chan_skinny.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * chan_skinny was developed by Jeremy McNamara & Florian Overkamp
 * chan_skinny was heavily modified/fixed by North Antara
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief Implementation of the Skinny protocol
 *
 * \author Jeremy McNamara & Florian Overkamp & North Antara
 * \ingroup channel_drivers
 */

/*** MODULEINFO
   <support_level>extended</support_level>
 ***/

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision: 354429 $")

#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <fcntl.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/signal.h>
#include <signal.h>
#include <ctype.h>

#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/sched.h"
#include "asterisk/io.h"
#include "asterisk/rtp_engine.h"
#include "asterisk/netsock.h"
#include "asterisk/acl.h"
#include "asterisk/callerid.h"
#include "asterisk/cli.h"
#include "asterisk/manager.h"
#include "asterisk/say.h"
#include "asterisk/cdr.h"
#include "asterisk/astdb.h"
#include "asterisk/features.h"
#include "asterisk/app.h"
#include "asterisk/musiconhold.h"
#include "asterisk/utils.h"
#include "asterisk/dsp.h"
#include "asterisk/stringfields.h"
#include "asterisk/abstract_jb.h"
#include "asterisk/threadstorage.h"
#include "asterisk/devicestate.h"
#include "asterisk/event.h"
#include "asterisk/indications.h"
#include "asterisk/linkedlists.h"

/*** DOCUMENTATION
   <manager name="SKINNYdevices" language="en_US">
      <synopsis>
         List SKINNY devices (text format).
      </synopsis>
      <syntax>
         <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
      </syntax>
      <description>
         <para>Lists Skinny devices in text format with details on current status.
         Devicelist will follow as separate events, followed by a final event called
         DevicelistComplete.</para>
      </description>
   </manager>
   <manager name="SKINNYshowdevice" language="en_US">
      <synopsis>
         Show SKINNY device (text format).
      </synopsis>
      <syntax>
         <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
         <parameter name="Device" required="true">
            <para>The device name you want to check.</para>
         </parameter>
      </syntax>
      <description>
         <para>Show one SKINNY device with details on current status.</para>
      </description>
   </manager>
   <manager name="SKINNYlines" language="en_US">
      <synopsis>
         List SKINNY lines (text format).
      </synopsis>
      <syntax>
         <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
      </syntax>
      <description>
         <para>Lists Skinny lines in text format with details on current status.
         Linelist will follow as separate events, followed by a final event called
         LinelistComplete.</para>
      </description>
   </manager>
   <manager name="SKINNYshowline" language="en_US">
      <synopsis>
         Show SKINNY line (text format).
      </synopsis>
      <syntax>
         <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
         <parameter name="Line" required="true">
            <para>The line name you want to check.</para>
         </parameter>
      </syntax>
      <description>
         <para>Show one SKINNY line with details on current status.</para>
      </description>
   </manager>
 ***/

/* Hack to allow for easy debugging in trunk.
    This block should be removed in branches. */
#ifndef SKINNY_DEVMODE
#define SKINNY_DEVMODE
#endif
/* end hack */

#ifdef SKINNY_DEVMODE
#define SKINNY_DEVONLY(code)  \
   code
#else
#define SKINNY_DEVONLY(code)
#endif

/*************************************
 * Skinny/Asterisk Protocol Settings *
 *************************************/
static const char tdesc[] = "Skinny Client Control Protocol (Skinny)";
static const char config[] = "skinny.conf";

static struct ast_format_cap *default_cap;
static struct ast_codec_pref default_prefs;

enum skinny_codecs {
   SKINNY_CODEC_ALAW = 2,
   SKINNY_CODEC_ULAW = 4,
   SKINNY_CODEC_G723_1 = 9,
   SKINNY_CODEC_G729A = 12,
   SKINNY_CODEC_G726_32 = 82, /* XXX Which packing order does this translate to? */
   SKINNY_CODEC_H261 = 100,
   SKINNY_CODEC_H263 = 101
};

#define DEFAULT_SKINNY_PORT 2000
#define DEFAULT_SKINNY_BACKLOG 2
#define SKINNY_MAX_PACKET 2000
#define DEFAULT_AUTH_TIMEOUT 30
#define DEFAULT_AUTH_LIMIT 50

static struct {
   unsigned int tos;
   unsigned int tos_audio;
   unsigned int tos_video;
   unsigned int cos;
   unsigned int cos_audio;
   unsigned int cos_video;
} qos = { 0, 0, 0, 0, 0, 0 };

static int keep_alive = 120;
static int auth_timeout = DEFAULT_AUTH_TIMEOUT;
static int auth_limit = DEFAULT_AUTH_LIMIT;
static int unauth_sessions = 0;
static char global_vmexten[AST_MAX_EXTENSION];      /* Voicemail pilot number */
static char used_context[AST_MAX_EXTENSION]; /* placeholder to check if context are already used in regcontext */
static char regcontext[AST_MAX_CONTEXT];     /* Context for auto-extension */
static char date_format[6] = "D-M-Y";
static char version_id[16] = "P002F202";

#if __BYTE_ORDER == __LITTLE_ENDIAN
#define letohl(x) (x)
#define letohs(x) (x)
#define htolel(x) (x)
#define htoles(x) (x)
#else
#if defined(HAVE_BYTESWAP_H)
#include <byteswap.h>
#define letohl(x) bswap_32(x)
#define letohs(x) bswap_16(x)
#define htolel(x) bswap_32(x)
#define htoles(x) bswap_16(x)
#elif defined(HAVE_SYS_ENDIAN_SWAP16)
#include <sys/endian.h>
#define letohl(x) __swap32(x)
#define letohs(x) __swap16(x)
#define htolel(x) __swap32(x)
#define htoles(x) __swap16(x)
#elif defined(HAVE_SYS_ENDIAN_BSWAP16)
#include <sys/endian.h>
#define letohl(x) bswap32(x)
#define letohs(x) bswap16(x)
#define htolel(x) bswap32(x)
#define htoles(x) bswap16(x)
#else
#define __bswap_16(x) \
   ((((x) & 0xff00) >> 8) | \
    (((x) & 0x00ff) << 8))
#define __bswap_32(x) \
   ((((x) & 0xff000000) >> 24) | \
    (((x) & 0x00ff0000) >>  8) | \
    (((x) & 0x0000ff00) <<  8) | \
    (((x) & 0x000000ff) << 24))
#define letohl(x) __bswap_32(x)
#define letohs(x) __bswap_16(x)
#define htolel(x) __bswap_32(x)
#define htoles(x) __bswap_16(x)
#endif
#endif

/*! Global jitterbuffer configuration - by default, jb is disabled
 *  \note Values shown here match the defaults shown in skinny.conf.sample */
static struct ast_jb_conf default_jbconf =
{
   .flags = 0,
   .max_size = 200,
   .resync_threshold = 1000,
   .impl = "fixed",
   .target_extra = 40,
};
static struct ast_jb_conf global_jbconf;

#ifdef SKINNY_DEVMODE
AST_THREADSTORAGE(message2str_threadbuf);
#define MESSAGE2STR_BUFSIZE   35
#endif

AST_THREADSTORAGE(device2str_threadbuf);
#define DEVICE2STR_BUFSIZE   15

AST_THREADSTORAGE(control2str_threadbuf);
#define CONTROL2STR_BUFSIZE   100

AST_THREADSTORAGE(substate2str_threadbuf);
#define SUBSTATE2STR_BUFSIZE   15

AST_THREADSTORAGE(callstate2str_threadbuf);
#define CALLSTATE2STR_BUFSIZE   15

/*********************
 * Protocol Messages *
 *********************/
/* message types */
#define KEEP_ALIVE_MESSAGE 0x0000
/* no additional struct */

#define REGISTER_MESSAGE 0x0001
struct register_message {
   char name[16];
   uint32_t userId;
   uint32_t instance;
   uint32_t ip;
   uint32_t type;
   uint32_t maxStreams;
   uint32_t space;
   uint8_t protocolVersion;
   /*! \brief space2 is used for newer version of skinny */
   char space2[3];
};

#define IP_PORT_MESSAGE 0x0002

#define KEYPAD_BUTTON_MESSAGE 0x0003
struct keypad_button_message {
   uint32_t button;
   uint32_t lineInstance;
   uint32_t callReference;
};


#define ENBLOC_CALL_MESSAGE 0x0004
struct enbloc_call_message {
   char calledParty[24];
};

#define STIMULUS_MESSAGE 0x0005
struct stimulus_message {
   uint32_t stimulus;
   uint32_t stimulusInstance;
   uint32_t callreference;
};

#define OFFHOOK_MESSAGE 0x0006
struct offhook_message {
   uint32_t instance;
   uint32_t reference;
};

#define ONHOOK_MESSAGE 0x0007
struct onhook_message {
   uint32_t instance;
   uint32_t reference;
};

#define CAPABILITIES_RES_MESSAGE 0x0010
struct station_capabilities {
   uint32_t codec; /* skinny codec, not ast codec */
   uint32_t frames;
   union {
      char res[8];
      uint32_t rate;
   } payloads;
};

#define SKINNY_MAX_CAPABILITIES 18

struct capabilities_res_message {
   uint32_t count;
   struct station_capabilities caps[SKINNY_MAX_CAPABILITIES];
};

#define SPEED_DIAL_STAT_REQ_MESSAGE 0x000A
struct speed_dial_stat_req_message {
   uint32_t speedDialNumber;
};

#define LINE_STATE_REQ_MESSAGE 0x000B
struct line_state_req_message {
   uint32_t lineNumber;
};

#define TIME_DATE_REQ_MESSAGE 0x000D
#define BUTTON_TEMPLATE_REQ_MESSAGE 0x000E
#define VERSION_REQ_MESSAGE 0x000F
#define SERVER_REQUEST_MESSAGE 0x0012

#define ALARM_MESSAGE 0x0020
struct alarm_message {
   uint32_t alarmSeverity;
   char displayMessage[80];
   uint32_t alarmParam1;
   uint32_t alarmParam2;
};

#define OPEN_RECEIVE_CHANNEL_ACK_MESSAGE 0x0022
struct open_receive_channel_ack_message_ip4 {
   uint32_t status;
   uint32_t ipAddr;
   uint32_t port;
   uint32_t callReference;
};
struct open_receive_channel_ack_message_ip6 {
   uint32_t status;
   uint32_t space;
   char ipAddr[16];
   uint32_t port;
   uint32_t callReference;
};

#define SOFT_KEY_SET_REQ_MESSAGE 0x0025

#define SOFT_KEY_EVENT_MESSAGE 0x0026
struct soft_key_event_message {
   uint32_t softKeyEvent;
   uint32_t instance;
   uint32_t callreference;
};

#define UNREGISTER_MESSAGE 0x0027
#define SOFT_KEY_TEMPLATE_REQ_MESSAGE 0x0028
#define HEADSET_STATUS_MESSAGE 0x002B
#define REGISTER_AVAILABLE_LINES_MESSAGE 0x002D

#define REGISTER_ACK_MESSAGE 0x0081
struct register_ack_message {
   uint32_t keepAlive;
   char dateTemplate[6];
   char res[2];
   uint32_t secondaryKeepAlive;
   char res2[4];
};

#define START_TONE_MESSAGE 0x0082
struct start_tone_message {
   uint32_t tone;
   uint32_t space;
   uint32_t instance;
   uint32_t reference;
};

#define STOP_TONE_MESSAGE 0x0083
struct stop_tone_message {
   uint32_t instance;
   uint32_t reference;
   uint32_t space;
};

#define SET_RINGER_MESSAGE 0x0085
struct set_ringer_message {
   uint32_t ringerMode;
   uint32_t unknown1; /* See notes in transmit_ringer_mode */
   uint32_t unknown2;
   uint32_t space[2];
};

#define SET_LAMP_MESSAGE 0x0086
struct set_lamp_message {
   uint32_t stimulus;
   uint32_t stimulusInstance;
   uint32_t deviceStimulus;
};

#define SET_SPEAKER_MESSAGE 0x0088
struct set_speaker_message {
   uint32_t mode;
};

/* XXX When do we need to use this? */
#define SET_MICROPHONE_MESSAGE 0x0089
struct set_microphone_message {
   uint32_t mode;
};

#define START_MEDIA_TRANSMISSION_MESSAGE 0x008A
struct media_qualifier {
   uint32_t precedence;
   uint32_t vad;
   uint32_t packets;
   uint32_t bitRate;
};

struct start_media_transmission_message_ip4 {
   uint32_t conferenceId;
   uint32_t passThruPartyId;
   uint32_t remoteIp;
   uint32_t remotePort;
   uint32_t packetSize;
   uint32_t payloadType;
   struct media_qualifier qualifier;
   uint32_t space[19];
};

struct start_media_transmission_message_ip6 {
   uint32_t conferenceId;
   uint32_t passThruPartyId;
   uint32_t space;
   char remoteIp[16];
   uint32_t remotePort;
   uint32_t packetSize;
   uint32_t payloadType;
   struct media_qualifier qualifier;
   /*! \brief space2 is used for newer version of skinny */
   uint32_t space2[19];
};

#define STOP_MEDIA_TRANSMISSION_MESSAGE 0x008B
struct stop_media_transmission_message {
   uint32_t conferenceId;
   uint32_t passThruPartyId;
   uint32_t space[3];
};

#define CALL_INFO_MESSAGE 0x008F
struct call_info_message {
   char callingPartyName[40];
   char callingParty[24];
   char calledPartyName[40];
   char calledParty[24];
   uint32_t instance;
   uint32_t reference;
   uint32_t type;
   char originalCalledPartyName[40];
   char originalCalledParty[24];
   char lastRedirectingPartyName[40];
   char lastRedirectingParty[24];
   uint32_t originalCalledPartyRedirectReason;
   uint32_t lastRedirectingReason;
   char callingPartyVoiceMailbox[24];
   char calledPartyVoiceMailbox[24];
   char originalCalledPartyVoiceMailbox[24];
   char lastRedirectingVoiceMailbox[24];
   uint32_t space[3];
};

#define FORWARD_STAT_MESSAGE 0x0090
struct forward_stat_message {
   uint32_t activeforward;
   uint32_t lineNumber;
   uint32_t fwdall;
   char fwdallnum[24];
   uint32_t fwdbusy;
   char fwdbusynum[24];
   uint32_t fwdnoanswer;
   char fwdnoanswernum[24];
};

#define SPEED_DIAL_STAT_RES_MESSAGE 0x0091
struct speed_dial_stat_res_message {
   uint32_t speedDialNumber;
   char speedDialDirNumber[24];
   char speedDialDisplayName[40];
};

#define LINE_STAT_RES_MESSAGE 0x0092
struct line_stat_res_message {
   uint32_t lineNumber;
   char lineDirNumber[24];
   char lineDisplayName[24];
   uint32_t space[15];
};

#define DEFINETIMEDATE_MESSAGE 0x0094
struct definetimedate_message {
   uint32_t year; /* since 1900 */
   uint32_t month;
   uint32_t dayofweek; /* monday = 1 */
   uint32_t day;
   uint32_t hour;
   uint32_t minute;
   uint32_t seconds;
   uint32_t milliseconds;
   uint32_t timestamp;
};

#define BUTTON_TEMPLATE_RES_MESSAGE 0x0097
struct button_definition {
   uint8_t instanceNumber;
   uint8_t buttonDefinition;
};

struct button_definition_template {
   uint8_t buttonDefinition;
   /* for now, anything between 0xB0 and 0xCF is custom */
   /*int custom;*/
};

#define STIMULUS_REDIAL 0x01
#define STIMULUS_SPEEDDIAL 0x02
#define STIMULUS_HOLD 0x03
#define STIMULUS_TRANSFER 0x04
#define STIMULUS_FORWARDALL 0x05
#define STIMULUS_FORWARDBUSY 0x06
#define STIMULUS_FORWARDNOANSWER 0x07
#define STIMULUS_DISPLAY 0x08
#define STIMULUS_LINE 0x09
#define STIMULUS_VOICEMAIL 0x0F
#define STIMULUS_AUTOANSWER 0x11
#define STIMULUS_DND 0x3F
#define STIMULUS_CONFERENCE 0x7D
#define STIMULUS_CALLPARK 0x7E
#define STIMULUS_CALLPICKUP 0x7F
#define STIMULUS_NONE 0xFF

/* Button types */
#define BT_REDIAL STIMULUS_REDIAL
#define BT_SPEEDDIAL STIMULUS_SPEEDDIAL
#define BT_HOLD STIMULUS_HOLD
#define BT_TRANSFER STIMULUS_TRANSFER
#define BT_FORWARDALL STIMULUS_FORWARDALL
#define BT_FORWARDBUSY STIMULUS_FORWARDBUSY
#define BT_FORWARDNOANSWER STIMULUS_FORWARDNOANSWER
#define BT_DISPLAY STIMULUS_DISPLAY
#define BT_LINE STIMULUS_LINE
#define BT_VOICEMAIL STIMULUS_VOICEMAIL
#define BT_AUTOANSWER STIMULUS_AUTOANSWER
#define BT_DND STIMULUS_DND
#define BT_CONFERENCE STIMULUS_CONFERENCE
#define BT_CALLPARK STIMULUS_CALLPARK
#define BT_CALLPICKUP STIMULUS_CALLPICKUP
#define BT_NONE 0x00

/* Custom button types - add our own between 0xB0 and 0xCF.
   This may need to be revised in the future,
   if stimuluses are ever added in this range. */
#define BT_CUST_LINESPEEDDIAL 0xB0 /* line or speeddial with/without hint */
#define BT_CUST_LINE 0xB1          /* line or speeddial with hint only */

struct button_template_res_message {
   uint32_t buttonOffset;
   uint32_t buttonCount;
   uint32_t totalButtonCount;
   struct button_definition definition[42];
};

#define VERSION_RES_MESSAGE 0x0098
struct version_res_message {
   char version[16];
};

#define DISPLAYTEXT_MESSAGE 0x0099
struct displaytext_message {
   char text[40];
};

#define CLEAR_NOTIFY_MESSAGE  0x0115
#define CLEAR_DISPLAY_MESSAGE 0x009A
struct clear_display_message {
   uint32_t space;
};

#define CAPABILITIES_REQ_MESSAGE 0x009B

#define REGISTER_REJ_MESSAGE 0x009D
struct register_rej_message {
   char errMsg[33];
};

#define SERVER_RES_MESSAGE 0x009E
struct server_identifier {
   char serverName[48];
};

struct server_res_message {
   struct server_identifier server[5];
   uint32_t serverListenPort[5];
   uint32_t serverIpAddr[5];
};

#define RESET_MESSAGE 0x009F
struct reset_message {
   uint32_t resetType;
};

#define KEEP_ALIVE_ACK_MESSAGE 0x0100

#define OPEN_RECEIVE_CHANNEL_MESSAGE 0x0105
struct open_receive_channel_message {
   uint32_t conferenceId;
   uint32_t partyId;
   uint32_t packets;
   uint32_t capability;
   uint32_t echo;
   uint32_t bitrate;
   uint32_t space[36];
};

#define CLOSE_RECEIVE_CHANNEL_MESSAGE 0x0106
struct close_receive_channel_message {
   uint32_t conferenceId;
   uint32_t partyId;
   uint32_t space[2];
};

#define SOFT_KEY_TEMPLATE_RES_MESSAGE 0x0108

struct soft_key_template_definition {
   char softKeyLabel[16];
   uint32_t softKeyEvent;
};

#define KEYDEF_ONHOOK 0
#define KEYDEF_CONNECTED 1
#define KEYDEF_ONHOLD 2
#define KEYDEF_RINGIN 3
#define KEYDEF_OFFHOOK 4
#define KEYDEF_CONNWITHTRANS 5
#define KEYDEF_DADFD 6 /* Digits After Dialing First Digit */
#define KEYDEF_CONNWITHCONF 7
#define KEYDEF_RINGOUT 8
#define KEYDEF_OFFHOOKWITHFEAT 9
#define KEYDEF_UNKNOWN 10
#define KEYDEF_SLAHOLD 11
#define KEYDEF_SLACONNECTEDNOTACTIVE 12

#define SOFTKEY_NONE 0x00
#define SOFTKEY_REDIAL 0x01
#define SOFTKEY_NEWCALL 0x02
#define SOFTKEY_HOLD 0x03
#define SOFTKEY_TRNSFER 0x04
#define SOFTKEY_CFWDALL 0x05
#define SOFTKEY_CFWDBUSY 0x06
#define SOFTKEY_CFWDNOANSWER 0x07
#define SOFTKEY_BKSPC 0x08
#define SOFTKEY_ENDCALL 0x09
#define SOFTKEY_RESUME 0x0A
#define SOFTKEY_ANSWER 0x0B
#define SOFTKEY_INFO 0x0C
#define SOFTKEY_CONFRN 0x0D
#define SOFTKEY_PARK 0x0E
#define SOFTKEY_JOIN 0x0F
#define SOFTKEY_MEETME 0x10
#define SOFTKEY_PICKUP 0x11
#define SOFTKEY_GPICKUP 0x12
#define SOFTKEY_DND 0x13
#define SOFTKEY_IDIVERT 0x14

static struct soft_key_template_definition soft_key_template_default[] = {
   { "\200\001", SOFTKEY_REDIAL },
   { "\200\002", SOFTKEY_NEWCALL },
   { "\200\003", SOFTKEY_HOLD },
   { "\200\004", SOFTKEY_TRNSFER },
   { "\200\005", SOFTKEY_CFWDALL },
   { "\200\006", SOFTKEY_CFWDBUSY },
   { "\200\007", SOFTKEY_CFWDNOANSWER },
   { "\200\010", SOFTKEY_BKSPC },
   { "\200\011", SOFTKEY_ENDCALL },
   { "\200\012", SOFTKEY_RESUME },
   { "\200\013", SOFTKEY_ANSWER },
   { "\200\014", SOFTKEY_INFO },
   { "\200\015", SOFTKEY_CONFRN },
   { "\200\016", SOFTKEY_PARK },
   { "\200\017", SOFTKEY_JOIN },
   { "\200\020", SOFTKEY_MEETME },
   { "\200\021", SOFTKEY_PICKUP },
   { "\200\022", SOFTKEY_GPICKUP },
   { "\200\077", SOFTKEY_DND },
   { "\200\120", SOFTKEY_IDIVERT },
};

/* Localized message "codes" (in octal)
   Below is en_US (taken from a 7970)

   \200\xxx
       \000: ???
       \001: Redial
       \002: New Call
       \003: Hold
       \004: Transfer
       \005: CFwdALL
       \006: CFwdBusy
       \007: CFwdNoAnswer
       \010: <<
       \011: EndCall
       \012: Resume
       \013: Answer
       \014: Info
       \015: Confrn
       \016: Park
       \017: Join
       \020: MeetMe
       \021: PickUp
       \022: GPickUp
       \023: Your current options
       \024: Off Hook
       \025: On Hook
       \026: Ring out
       \027: From
       \030: Connected
       \031: Busy
       \032: Line In Use
       \033: Call Waiting
       \034: Call Transfer
       \035: Call Park
       \036: Call Proceed
       \037: In Use Remote
       \040: Enter number
       \041: Call park At
       \042: Primary Only
       \043: Temp Fail
       \044: You Have VoiceMail
       \045: Forwarded to
       \046: Can Not Complete Conference
       \047: No Conference Bridge
       \050: Can Not Hold Primary Control
       \051: Invalid Conference Participant
       \052: In Conference Already
       \053: No Participant Info
       \054: Exceed Maximum Parties
       \055: Key Is Not Active
       \056: Error No License
       \057: Error DBConfig
       \060: Error Database
       \061: Error Pass Limit
       \062: Error Unknown
       \063: Error Mismatch
       \064: Conference
       \065: Park Number
       \066: Private
       \067: Not Enough Bandwidth
       \070: Unknown Number
       \071: RmLstC
       \072: Voicemail
       \073: ImmDiv
       \074: Intrcpt
       \075: SetWtch
       \076: TrnsfVM
       \077: DND
       \100: DivAll
       \101: CallBack
       \102: Network congestion,rerouting
       \103: Barge
       \104: Failed to setup Barge
       \105: Another Barge exists
       \106: Incompatible device type
       \107: No Park Number Available
       \110: CallPark Reversion
       \111: Service is not Active
       \112: High Traffic Try Again Later
       \113: QRT
       \114: MCID
       \115: DirTrfr
       \116: Select
       \117: ConfList
       \120: iDivert
       \121: cBarge
       \122: Can Not Complete Transfer
       \123: Can Not Join Calls
       \124: Mcid Successful
       \125: Number Not Configured
       \126: Security Error
       \127: Video Bandwidth Unavailable
       \130: VidMode
       \131: Max Call Duration Timeout
       \132: Max Hold Duration Timeout
       \133: OPickUp
       \134: ???
       \135: ???
       \136: ???
       \137: ???
       \140: ???
       \141: External Transfer Restricted
       \142: ???
       \143: ???
       \144: ???
       \145: Mac Address
       \146: Host Name
       \147: Domain Name
       \150: IP Address
       \151: Subnet Mask
       \152: TFTP Server 1
       \153: Default Router 1
       \154: Default Router 2
       \155: Default Router 3
       \156: Default Router 4
       \157: Default Router 5
       \160: DNS Server 1
       \161: DNS Server 2
       \162: DNS Server 3
       \163: DNS Server 4
       \164: DNS Server 5
       \165: Operational VLAN Id
       \166: Admin. VLAN Id
       \167: CallManager 1
       \170: CallManager 2
       \171: CallManager 3
       \172: CallManager 4
       \173: CallManager 5
       \174: Information URL
       \175: Directories URL
       \176: Messages URL
       \177: Services URL
 */

struct soft_key_definitions {
   const uint8_t mode;
   const uint8_t *defaults;
   const int count;
};

static const uint8_t soft_key_default_onhook[] = {
   SOFTKEY_REDIAL,
   SOFTKEY_NEWCALL,
   SOFTKEY_CFWDALL,
   SOFTKEY_CFWDBUSY,
   SOFTKEY_DND,
   /*SOFTKEY_GPICKUP,
   SOFTKEY_CONFRN,*/
};

static const uint8_t soft_key_default_connected[] = {
   SOFTKEY_HOLD,
   SOFTKEY_ENDCALL,
   SOFTKEY_TRNSFER,
   SOFTKEY_PARK,
   SOFTKEY_CFWDALL,
   SOFTKEY_CFWDBUSY,
};

static const uint8_t soft_key_default_onhold[] = {
   SOFTKEY_RESUME,
   SOFTKEY_NEWCALL,
   SOFTKEY_ENDCALL,
   SOFTKEY_TRNSFER,
};

static const uint8_t soft_key_default_ringin[] = {
   SOFTKEY_ANSWER,
   SOFTKEY_ENDCALL,
   SOFTKEY_TRNSFER,
};

static const uint8_t soft_key_default_offhook[] = {
   SOFTKEY_REDIAL,
   SOFTKEY_ENDCALL,
   SOFTKEY_CFWDALL,
   SOFTKEY_CFWDBUSY,
   /*SOFTKEY_GPICKUP,*/
};

static const uint8_t soft_key_default_connwithtrans[] = {
   SOFTKEY_HOLD,
   SOFTKEY_ENDCALL,
   SOFTKEY_TRNSFER,
   SOFTKEY_PARK,
   SOFTKEY_CFWDALL,
   SOFTKEY_CFWDBUSY,
};

static const uint8_t soft_key_default_dadfd[] = {
   SOFTKEY_BKSPC,
   SOFTKEY_ENDCALL,
};

static const uint8_t soft_key_default_connwithconf[] = {
   SOFTKEY_NONE,
};

static const uint8_t soft_key_default_ringout[] = {
   SOFTKEY_NONE,
   SOFTKEY_ENDCALL,
};

static const uint8_t soft_key_default_offhookwithfeat[] = {
   SOFTKEY_REDIAL,
   SOFTKEY_ENDCALL,
   SOFTKEY_TRNSFER,
};

static const uint8_t soft_key_default_unknown[] = {
   SOFTKEY_NONE,
};

static const uint8_t soft_key_default_SLAhold[] = {
   SOFTKEY_REDIAL,
   SOFTKEY_NEWCALL,
   SOFTKEY_RESUME,
};

static const uint8_t soft_key_default_SLAconnectednotactive[] = {
   SOFTKEY_REDIAL,
   SOFTKEY_NEWCALL,
   SOFTKEY_JOIN,
};

static const struct soft_key_definitions soft_key_default_definitions[] = {
   {KEYDEF_ONHOOK, soft_key_default_onhook, sizeof(soft_key_default_onhook) / sizeof(uint8_t)},
   {KEYDEF_CONNECTED, soft_key_default_connected, sizeof(soft_key_default_connected) / sizeof(uint8_t)},
   {KEYDEF_ONHOLD, soft_key_default_onhold, sizeof(soft_key_default_onhold) / sizeof(uint8_t)},
   {KEYDEF_RINGIN, soft_key_default_ringin, sizeof(soft_key_default_ringin) / sizeof(uint8_t)},
   {KEYDEF_OFFHOOK, soft_key_default_offhook, sizeof(soft_key_default_offhook) / sizeof(uint8_t)},
   {KEYDEF_CONNWITHTRANS, soft_key_default_connwithtrans, sizeof(soft_key_default_connwithtrans) / sizeof(uint8_t)},
   {KEYDEF_DADFD, soft_key_default_dadfd, sizeof(soft_key_default_dadfd) / sizeof(uint8_t)},
   {KEYDEF_CONNWITHCONF, soft_key_default_connwithconf, sizeof(soft_key_default_connwithconf) / sizeof(uint8_t)},
   {KEYDEF_RINGOUT, soft_key_default_ringout, sizeof(soft_key_default_ringout) / sizeof(uint8_t)},
   {KEYDEF_OFFHOOKWITHFEAT, soft_key_default_offhookwithfeat, sizeof(soft_key_default_offhookwithfeat) / sizeof(uint8_t)},
   {KEYDEF_UNKNOWN, soft_key_default_unknown, sizeof(soft_key_default_unknown) / sizeof(uint8_t)},
   {KEYDEF_SLAHOLD, soft_key_default_SLAhold, sizeof(soft_key_default_SLAhold) / sizeof(uint8_t)},
   {KEYDEF_SLACONNECTEDNOTACTIVE, soft_key_default_SLAconnectednotactive, sizeof(soft_key_default_SLAconnectednotactive) / sizeof(uint8_t)}
};

struct soft_key_template_res_message {
   uint32_t softKeyOffset;
   uint32_t softKeyCount;
   uint32_t totalSoftKeyCount;
   struct soft_key_template_definition softKeyTemplateDefinition[32];
};

#define SOFT_KEY_SET_RES_MESSAGE 0x0109

struct soft_key_set_definition {
   uint8_t softKeyTemplateIndex[16];
   uint16_t softKeyInfoIndex[16];
};

struct soft_key_set_res_message {
   uint32_t softKeySetOffset;
   uint32_t softKeySetCount;
   uint32_t totalSoftKeySetCount;
   struct soft_key_set_definition softKeySetDefinition[16];
   uint32_t res;
};

#define SELECT_SOFT_KEYS_MESSAGE 0x0110
struct select_soft_keys_message {
   uint32_t instance;
   uint32_t reference;
   uint32_t softKeySetIndex;
   uint32_t validKeyMask;
};

#define CALL_STATE_MESSAGE 0x0111
struct call_state_message {
   uint32_t callState;
   uint32_t lineInstance;
   uint32_t callReference;
   uint32_t space[3];
};

#define DISPLAY_PROMPT_STATUS_MESSAGE 0x0112
struct display_prompt_status_message {
   uint32_t messageTimeout;
   char promptMessage[32];
   uint32_t lineInstance;
   uint32_t callReference;
   uint32_t space[3];
};

#define CLEAR_PROMPT_MESSAGE  0x0113
struct clear_prompt_message {
   uint32_t lineInstance;
   uint32_t callReference;
};

#define DISPLAY_NOTIFY_MESSAGE 0x0114
struct display_notify_message {
   uint32_t displayTimeout;
   char displayMessage[100];
};

#define ACTIVATE_CALL_PLANE_MESSAGE 0x0116
struct activate_call_plane_message {
   uint32_t lineInstance;
};

#define DIALED_NUMBER_MESSAGE 0x011D
struct dialed_number_message {
   char dialedNumber[24];
   uint32_t lineInstance;
   uint32_t callReference;
};

union skinny_data {
   struct alarm_message alarm;
   struct speed_dial_stat_req_message speeddialreq;
   struct register_message reg;
   struct register_ack_message regack;
   struct register_rej_message regrej;
   struct capabilities_res_message caps;
   struct version_res_message version;
   struct button_template_res_message buttontemplate;
   struct displaytext_message displaytext;
   struct clear_display_message cleardisplay;
   struct display_prompt_status_message displaypromptstatus;
   struct clear_prompt_message clearpromptstatus;
   struct definetimedate_message definetimedate;
   struct start_tone_message starttone;
   struct stop_tone_message stoptone;
   struct speed_dial_stat_res_message speeddial;
   struct line_state_req_message line;
   struct line_stat_res_message linestat;
   struct soft_key_set_res_message softkeysets;
   struct soft_key_template_res_message softkeytemplate;
   struct server_res_message serverres;
   struct reset_message reset;
   struct set_lamp_message setlamp;
   struct set_ringer_message setringer;
   struct call_state_message callstate;
   struct keypad_button_message keypad;
   struct select_soft_keys_message selectsoftkey;
   struct activate_call_plane_message activatecallplane;
   struct stimulus_message stimulus;
   struct offhook_message offhook;
   struct onhook_message onhook;
   struct set_speaker_message setspeaker;
   struct set_microphone_message setmicrophone;
   struct call_info_message callinfo;
   struct start_media_transmission_message_ip4 startmedia_ip4;
   struct start_media_transmission_message_ip6 startmedia_ip6;
   struct stop_media_transmission_message stopmedia;
   struct open_receive_channel_message openreceivechannel;
   struct open_receive_channel_ack_message_ip4 openreceivechannelack_ip4;
   struct open_receive_channel_ack_message_ip6 openreceivechannelack_ip6;
   struct close_receive_channel_message closereceivechannel;
   struct display_notify_message displaynotify;
   struct dialed_number_message dialednumber;
   struct soft_key_event_message softkeyeventmessage;
   struct enbloc_call_message enbloccallmessage;
   struct forward_stat_message forwardstat;
};

/* packet composition */
struct skinny_req {
   int len;
   int res;
   int e;
   union skinny_data data;
};

/* XXX This is the combined size of the variables above.  (len, res, e)
   If more are added, this MUST change.
   (sizeof(skinny_req) - sizeof(skinny_data)) DOES NOT WORK on all systems (amd64?). */
static int skinny_header_size = 12;

/*****************************
 * Asterisk specific globals *
 *****************************/

static int skinnydebug = 0;
static int skinnyreload = 0;

/* a hostname, portnumber, socket and such is usefull for VoIP protocols */
static struct sockaddr_in bindaddr;
static char ourhost[256];
static int ourport;
static struct in_addr __ourip;
static struct ast_hostent ahp;
static struct hostent *hp;
static int skinnysock = -1;
static pthread_t accept_t;
static int callnums = 1;

#define SKINNY_DEVICE_UNKNOWN -1
#define SKINNY_DEVICE_NONE 0
#define SKINNY_DEVICE_30SPPLUS 1
#define SKINNY_DEVICE_12SPPLUS 2
#define SKINNY_DEVICE_12SP 3
#define SKINNY_DEVICE_12 4
#define SKINNY_DEVICE_30VIP 5
#define SKINNY_DEVICE_7910 6
#define SKINNY_DEVICE_7960 7
#define SKINNY_DEVICE_7940 8
#define SKINNY_DEVICE_7935 9
#define SKINNY_DEVICE_ATA186 12 /* Cisco ATA-186 */
#define SKINNY_DEVICE_7941 115
#define SKINNY_DEVICE_7971 119
#define SKINNY_DEVICE_7914 124 /* Expansion module */
#define SKINNY_DEVICE_7985 302
#define SKINNY_DEVICE_7911 307
#define SKINNY_DEVICE_7961GE 308
#define SKINNY_DEVICE_7941GE 309
#define SKINNY_DEVICE_7931 348
#define SKINNY_DEVICE_7921 365
#define SKINNY_DEVICE_7906 369
#define SKINNY_DEVICE_7962 404 /* Not found */
#define SKINNY_DEVICE_7937 431
#define SKINNY_DEVICE_7942 434
#define SKINNY_DEVICE_7945 435
#define SKINNY_DEVICE_7965 436
#define SKINNY_DEVICE_7975 437
#define SKINNY_DEVICE_7905 20000
#define SKINNY_DEVICE_7920 30002
#define SKINNY_DEVICE_7970 30006
#define SKINNY_DEVICE_7912 30007
#define SKINNY_DEVICE_7902 30008
#define SKINNY_DEVICE_CIPC 30016 /* Cisco IP Communicator */
#define SKINNY_DEVICE_7961 30018
#define SKINNY_DEVICE_7936 30019
#define SKINNY_DEVICE_SCCPGATEWAY_AN 30027 /* Analog gateway */
#define SKINNY_DEVICE_SCCPGATEWAY_BRI 30028 /* BRI gateway */

#define SKINNY_SPEAKERON 1
#define SKINNY_SPEAKEROFF 2

#define SKINNY_MICON 1
#define SKINNY_MICOFF 2

#define SKINNY_OFFHOOK 1
#define SKINNY_ONHOOK 2
#define SKINNY_RINGOUT 3
#define SKINNY_RINGIN 4
#define SKINNY_CONNECTED 5
#define SKINNY_BUSY 6
#define SKINNY_CONGESTION 7
#define SKINNY_HOLD 8
#define SKINNY_CALLWAIT 9
#define SKINNY_TRANSFER 10
#define SKINNY_PARK 11
#define SKINNY_PROGRESS 12
#define SKINNY_CALLREMOTEMULTILINE 13
#define SKINNY_INVALID 14

#define SKINNY_INCOMING 1
#define SKINNY_OUTGOING 2

#define SKINNY_SILENCE 0x00      /* Note sure this is part of the protocol, remove? */
#define SKINNY_DIALTONE 0x21
#define SKINNY_BUSYTONE 0x23
#define SKINNY_ALERT 0x24
#define SKINNY_REORDER 0x25
#define SKINNY_CALLWAITTONE 0x2D
#define SKINNY_ZIPZIP 0x31
#define SKINNY_ZIP 0x32
#define SKINNY_BEEPBONK 0x33
#define SKINNY_BARGIN 0x43
#define SKINNY_NOTONE 0x7F

#define SKINNY_LAMP_OFF 1
#define SKINNY_LAMP_ON 2
#define SKINNY_LAMP_WINK 3
#define SKINNY_LAMP_FLASH 4
#define SKINNY_LAMP_BLINK 5

#define SKINNY_RING_OFF 1
#define SKINNY_RING_INSIDE 2
#define SKINNY_RING_OUTSIDE 3
#define SKINNY_RING_FEATURE 4

#define SKINNY_CFWD_ALL       (1 << 0)
#define SKINNY_CFWD_BUSY      (1 << 1)
#define SKINNY_CFWD_NOANSWER  (1 << 2)

/* Skinny rtp stream modes. Do we really need this? */
#define SKINNY_CX_SENDONLY 0
#define SKINNY_CX_RECVONLY 1
#define SKINNY_CX_SENDRECV 2
#define SKINNY_CX_CONF 3
#define SKINNY_CX_CONFERENCE 3
#define SKINNY_CX_MUTE 4
#define SKINNY_CX_INACTIVE 4

#if 0
static const char * const skinny_cxmodes[] = {
   "sendonly",
   "recvonly",
   "sendrecv",
   "confrnce",
   "inactive"
};
#endif

/* driver scheduler */
static struct ast_sched_context *sched = NULL;

/* Protect the network socket */
AST_MUTEX_DEFINE_STATIC(netlock);

/* Wait up to 16 seconds for first digit */
static int firstdigittimeout = 16000;

/* How long to wait for following digits */
static int gendigittimeout = 8000;

/* How long to wait for an extra digit, if there is an ambiguous match */
static int matchdigittimeout = 3000;

#define SUBSTATE_UNSET 0
#define SUBSTATE_OFFHOOK 1
#define SUBSTATE_ONHOOK 2
#define SUBSTATE_RINGOUT 3
#define SUBSTATE_RINGIN 4
#define SUBSTATE_CONNECTED 5
#define SUBSTATE_BUSY 6
#define SUBSTATE_CONGESTION 7
#define SUBSTATE_HOLD 8
#define SUBSTATE_CALLWAIT 9
#define SUBSTATE_PROGRESS 12
#define SUBSTATE_DIALING 101

struct skinny_subchannel {
   ast_mutex_t lock;
   struct ast_channel *owner;
   struct ast_rtp_instance *rtp;
   struct ast_rtp_instance *vrtp;
   unsigned int callid;
   char exten[AST_MAX_EXTENSION];
   /* time_t lastouttime; */ /* Unused */
   int progress;
   int ringing;
   /* int lastout; */ /* Unused */
   int cxmode;
   int nat;
   int calldirection;
   int blindxfer;
   int xferor;
   int substate;
   int aa_sched;
   int aa_beep;
   int aa_mute;

   AST_LIST_ENTRY(skinny_subchannel) list;
   struct skinny_subchannel *related;
   struct skinny_line *line;
   struct skinny_subline *subline;
};

#define SKINNY_LINE_OPTIONS            \
   char name[80];             \
   char label[24];               \
   char accountcode[AST_MAX_ACCOUNT_CODE];      \
   char exten[AST_MAX_EXTENSION];         \
   char context[AST_MAX_CONTEXT];         \
   char language[MAX_LANGUAGE];        \
   char cid_num[AST_MAX_EXTENSION];       \
   char cid_name[AST_MAX_EXTENSION];      \
   char lastcallerid[AST_MAX_EXTENSION];     \
   int cfwdtype;              \
   char call_forward_all[AST_MAX_EXTENSION]; \
   char call_forward_busy[AST_MAX_EXTENSION];   \
   char call_forward_noanswer[AST_MAX_EXTENSION];  \
   char mailbox[AST_MAX_EXTENSION];    \
   char vmexten[AST_MAX_EXTENSION];    \
   char regexten[AST_MAX_EXTENSION];      \
   char regcontext[AST_MAX_CONTEXT];      \
   char parkinglot[AST_MAX_CONTEXT];      \
   char mohinterpret[MAX_MUSICCLASS];     \
   char mohsuggest[MAX_MUSICCLASS];    \
   char lastnumberdialed[AST_MAX_EXTENSION]; \
   char dialoutexten[AST_MAX_EXTENSION];     \
   char dialoutcontext[AST_MAX_CONTEXT];     \
   ast_group_t callgroup;           \
   ast_group_t pickupgroup;         \
   int callwaiting;           \
   int transfer;              \
   int threewaycalling;          \
   int mwiblink;              \
   int cancallforward;           \
   int getforward;               \
   int dnd;             \
   int hidecallerid;          \
   int amaflags;              \
   int instance;              \
   int group;              \
   struct ast_codec_pref confprefs;    \
   struct ast_codec_pref prefs;        \
   int nonCodecCapability;          \
   int immediate;             \
   int nat;             \
   int directmedia;           \
   int prune;

struct skinny_line {
   SKINNY_LINE_OPTIONS
   ast_mutex_t lock;
   struct skinny_container *container;
   struct ast_event_sub *mwi_event_sub; /* Event based MWI */
   struct skinny_subchannel *activesub;
   AST_LIST_HEAD(, skinny_subchannel) sub;
   AST_LIST_HEAD(, skinny_subline) sublines;
   AST_LIST_ENTRY(skinny_line) list;
   AST_LIST_ENTRY(skinny_line) all;
   struct skinny_device *device;
   struct ast_format_cap *cap;
   struct ast_format_cap *confcap;
   struct ast_variable *chanvars; /*!< Channel variables to set for inbound call */
   int newmsgs;
};

static struct skinny_line_options{
   SKINNY_LINE_OPTIONS
} default_line_struct = {
   .callwaiting = 1,
   .transfer = 1,
   .mwiblink = 0,
   .dnd = 0,
   .hidecallerid = 0,
   .amaflags = 0,
   .instance = 0,
   .directmedia = 0,
   .nat = 0,
   .getforward = 0,
   .prune = 0,
};
static struct skinny_line_options *default_line = &default_line_struct;

static AST_LIST_HEAD_STATIC(lines, skinny_line);

struct skinny_subline {
   struct skinny_container *container;
   struct skinny_line *line;
   struct skinny_subchannel *sub;
   AST_LIST_ENTRY(skinny_subline) list;
   char name[80];
   char context[AST_MAX_CONTEXT];
   char exten[AST_MAX_EXTENSION];
   char stname[AST_MAX_EXTENSION];
   char lnname[AST_MAX_EXTENSION];
   char ourName[40];
   char ourNum[24];
   char theirName[40];
   char theirNum[24];
   int calldirection;
   int substate;
   int extenstate;
   unsigned int callid;
};

struct skinny_speeddial {
   ast_mutex_t lock;
   struct skinny_container *container;
   char label[42];
   char context[AST_MAX_CONTEXT];
   char exten[AST_MAX_EXTENSION];
   int instance;
   int stateid;
   int laststate;
   int isHint;

   AST_LIST_ENTRY(skinny_speeddial) list;
   struct skinny_device *parent;
};

#define SKINNY_DEVICECONTAINER 1
#define SKINNY_LINECONTAINER 2
#define SKINNY_SUBLINECONTAINER 3
#define SKINNY_SDCONTAINER 4

struct skinny_container {
   int type;
   void *data;
};

struct skinny_addon {
   ast_mutex_t lock;
   char type[10];
   AST_LIST_ENTRY(skinny_addon) list;
   struct skinny_device *parent;
};

#define SKINNY_DEVICE_OPTIONS             \
   char name[80];                \
   char id[16];                  \
   char version_id[16];             \
   char vmexten[AST_MAX_EXTENSION];       \
   int type;                  \
   int protocolversion;          \
   int registered;                  \
   int hookstate;             \
   int lastlineinstance;               \
   int lastcallreference;              \
   struct ast_codec_pref confprefs;       \
   int earlyrtp;                 \
   int transfer;                 \
   int callwaiting;              \
   int mwiblink;                 \
   int dnd;                \
   int prune;

struct skinny_device {
   SKINNY_DEVICE_OPTIONS
   struct type *first;
   struct type *last;
   ast_mutex_t lock;
   struct sockaddr_in addr;
   struct in_addr ourip;
   struct ast_ha *ha;
   struct skinnysession *session;
   struct skinny_line *activeline;
   struct ast_format_cap *cap;
   struct ast_format_cap *confcap;
   AST_LIST_HEAD(, skinny_line) lines;
   AST_LIST_HEAD(, skinny_speeddial) speeddials;
   AST_LIST_HEAD(, skinny_addon) addons;
   AST_LIST_ENTRY(skinny_device) list;
};

static struct skinny_device_options {
   SKINNY_DEVICE_OPTIONS
} default_device_struct = {
   .transfer = 1,
   .earlyrtp = 1,
   .callwaiting = 1,
   .mwiblink = 0,
   .dnd = 0,
   .prune = 0,
   .hookstate = SKINNY_ONHOOK,
};
static struct skinny_device_options *default_device = &default_device_struct;
   
static AST_LIST_HEAD_STATIC(devices, skinny_device);

struct skinnysession {
   pthread_t t;
   ast_mutex_t lock;
   time_t start;
   struct sockaddr_in sin;
   int fd;
   char inbuf[SKINNY_MAX_PACKET];
   char outbuf[SKINNY_MAX_PACKET];
   struct skinny_device *device;
   AST_LIST_ENTRY(skinnysession) list;
};

static struct ast_channel *skinny_request(const char *type, struct ast_format_cap *cap, const struct ast_channel *requestor, const char *dest, int *cause);
static AST_LIST_HEAD_STATIC(sessions, skinnysession);

static int skinny_devicestate(const char *data);
static int skinny_call(struct ast_channel *ast, const char *dest, int timeout);
static int skinny_hangup(struct ast_channel *ast);
static int skinny_answer(struct ast_channel *ast);
static struct ast_frame *skinny_read(struct ast_channel *ast);
static int skinny_write(struct ast_channel *ast, struct ast_frame *frame);
static int skinny_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen);
static int skinny_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
static int skinny_senddigit_begin(struct ast_channel *ast, char digit);
static int skinny_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration);
static void mwi_event_cb(const struct ast_event *event, void *userdata);
static int skinny_reload(void);

static void setsubstate(struct skinny_subchannel *sub, int state);
static void dumpsub(struct skinny_subchannel *sub, int forcehangup);
static void activatesub(struct skinny_subchannel *sub, int state);
static void dialandactivatesub(struct skinny_subchannel *sub, char exten[AST_MAX_EXTENSION]);

static struct ast_channel_tech skinny_tech = {
   .type = "Skinny",
   .description = tdesc,
   .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
   .requester = skinny_request,
   .devicestate = skinny_devicestate,
   .call = skinny_call,
   .hangup = skinny_hangup,
   .answer = skinny_answer,
   .read = skinny_read,
   .write = skinny_write,
   .indicate = skinny_indicate,
   .fixup = skinny_fixup,
   .send_digit_begin = skinny_senddigit_begin,
   .send_digit_end = skinny_senddigit_end,
   .bridge = ast_rtp_instance_bridge, 
};

static int skinny_extensionstate_cb(const char *context, const char *exten, enum ast_extension_states state, void *data);
static int skinny_transfer(struct skinny_subchannel *sub);

static struct skinny_line *skinny_line_alloc(void)
{
   struct skinny_line *l;
   if (!(l = ast_calloc(1, sizeof(*l)))) {
      return NULL;
   }

   l->cap = ast_format_cap_alloc_nolock();
   l->confcap = ast_format_cap_alloc_nolock();
   if (!l->cap || !l->confcap) {
      l->cap = ast_format_cap_destroy(l->cap);
      l->confcap = ast_format_cap_destroy(l->confcap);
      ast_free(l);
      return NULL;
   }
   return l;
}
static struct skinny_line *skinny_line_destroy(struct skinny_line *l)
{
   l->cap = ast_format_cap_destroy(l->cap);
   l->confcap = ast_format_cap_destroy(l->confcap);
   ast_free(l->container);
   ast_free(l);
   return NULL;
}
static struct skinny_device *skinny_device_alloc(void)
{
   struct skinny_device *d;
   if (!(d = ast_calloc(1, sizeof(*d)))) {
      return NULL;
   }

   d->cap = ast_format_cap_alloc_nolock();
   d->confcap = ast_format_cap_alloc_nolock();
   if (!d->cap || !d->confcap) {
      d->cap = ast_format_cap_destroy(d->cap);
      d->confcap = ast_format_cap_destroy(d->confcap);
      ast_free(d);
      return NULL;
   }
   return d;
}
static struct skinny_device *skinny_device_destroy(struct skinny_device *d)
{
   d->cap = ast_format_cap_destroy(d->cap);
   d->confcap = ast_format_cap_destroy(d->confcap);
   ast_free(d);
   return NULL;
}

static void *get_button_template(struct skinnysession *s, struct button_definition_template *btn)
{
   struct skinny_device *d = s->device;
   struct skinny_addon *a;
   int i;

   switch (d->type) {
      case SKINNY_DEVICE_30SPPLUS:
      case SKINNY_DEVICE_30VIP:
         /* 13 rows, 2 columns */
         for (i = 0; i < 4; i++)
            (btn++)->buttonDefinition = BT_CUST_LINE;
         (btn++)->buttonDefinition = BT_REDIAL;
         (btn++)->buttonDefinition = BT_VOICEMAIL;
         (btn++)->buttonDefinition = BT_CALLPARK;
         (btn++)->buttonDefinition = BT_FORWARDALL;
         (btn++)->buttonDefinition = BT_CONFERENCE;
         for (i = 0; i < 4; i++)
            (btn++)->buttonDefinition = BT_NONE;
         for (i = 0; i < 13; i++)
            (btn++)->buttonDefinition = BT_SPEEDDIAL;
         
         break;
      case SKINNY_DEVICE_12SPPLUS:
      case SKINNY_DEVICE_12SP:
      case SKINNY_DEVICE_12:
         /* 6 rows, 2 columns */
         for (i = 0; i < 2; i++)
            (btn++)->buttonDefinition = BT_CUST_LINE;
         for (i = 0; i < 4; i++)
            (btn++)->buttonDefinition = BT_SPEEDDIAL;
         (btn++)->buttonDefinition = BT_HOLD;
         (btn++)->buttonDefinition = BT_REDIAL;
         (btn++)->buttonDefinition = BT_TRANSFER;
         (btn++)->buttonDefinition = BT_FORWARDALL;
         (btn++)->buttonDefinition = BT_CALLPARK;
         (btn++)->buttonDefinition = BT_VOICEMAIL;
         break;
      case SKINNY_DEVICE_7910:
         (btn++)->buttonDefinition = BT_LINE;
         (btn++)->buttonDefinition = BT_HOLD;
         (btn++)->buttonDefinition = BT_TRANSFER;
         (btn++)->buttonDefinition = BT_DISPLAY;
         (btn++)->buttonDefinition = BT_VOICEMAIL;
         (btn++)->buttonDefinition = BT_CONFERENCE;
         (btn++)->buttonDefinition = BT_FORWARDALL;
         for (i = 0; i < 2; i++)
            (btn++)->buttonDefinition = BT_SPEEDDIAL;
         (btn++)->buttonDefinition = BT_REDIAL;
         break;
      case SKINNY_DEVICE_7960:
      case SKINNY_DEVICE_7961:
      case SKINNY_DEVICE_7961GE:
      case SKINNY_DEVICE_7962:
      case SKINNY_DEVICE_7965:
         for (i = 0; i < 6; i++)
            (btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
         break;
      case SKINNY_DEVICE_7940:
      case SKINNY_DEVICE_7941:
      case SKINNY_DEVICE_7941GE:
      case SKINNY_DEVICE_7942:
      case SKINNY_DEVICE_7945:
         for (i = 0; i < 2; i++)
            (btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
         break;
      case SKINNY_DEVICE_7935:
      case SKINNY_DEVICE_7936:
         for (i = 0; i < 2; i++)
            (btn++)->buttonDefinition = BT_LINE;
         break;
      case SKINNY_DEVICE_ATA186:
         (btn++)->buttonDefinition = BT_LINE;
         break;
      case SKINNY_DEVICE_7970:
      case SKINNY_DEVICE_7971:
      case SKINNY_DEVICE_7975:
      case SKINNY_DEVICE_CIPC:
         for (i = 0; i < 8; i++)
            (btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
         break;
      case SKINNY_DEVICE_7985:
         /* XXX I have no idea what the buttons look like on these. */
         ast_log(LOG_WARNING, "Unsupported device type '%d (7985)' found.\n", d->type);
         break;
      case SKINNY_DEVICE_7912:
      case SKINNY_DEVICE_7911:
      case SKINNY_DEVICE_7905:
         (btn++)->buttonDefinition = BT_LINE;
         (btn++)->buttonDefinition = BT_HOLD;
         break;
      case SKINNY_DEVICE_7920:
         /* XXX I don't know if this is right. */
         for (i = 0; i < 4; i++)
            (btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
         break;
      case SKINNY_DEVICE_7921:
         for (i = 0; i < 6; i++)
            (btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
         break;
      case SKINNY_DEVICE_7902:
         ast_log(LOG_WARNING, "Unsupported device type '%d (7902)' found.\n", d->type);
         break;
      case SKINNY_DEVICE_7906:
         ast_log(LOG_WARNING, "Unsupported device type '%d (7906)' found.\n", d->type);
         break;
      case SKINNY_DEVICE_7931:
         ast_log(LOG_WARNING, "Unsupported device type '%d (7931)' found.\n", d->type);
         break;
      case SKINNY_DEVICE_7937:
         ast_log(LOG_WARNING, "Unsupported device type '%d (7937)' found.\n", d->type);
         break;
      case SKINNY_DEVICE_7914:
         ast_log(LOG_WARNING, "Unsupported device type '%d (7914)' found.  Expansion module registered by itself?\n", d->type);
         break;
      case SKINNY_DEVICE_SCCPGATEWAY_AN:
      case SKINNY_DEVICE_SCCPGATEWAY_BRI:
         ast_log(LOG_WARNING, "Unsupported device type '%d (SCCP gateway)' found.\n", d->type);
         break;
      default:
         ast_log(LOG_WARNING, "Unknown device type '%d' found.\n", d->type);
         break;
   }

   AST_LIST_LOCK(&d->addons);
   AST_LIST_TRAVERSE(&d->addons, a, list) {
      if (!strcasecmp(a->type, "7914")) {
         for (i = 0; i < 14; i++)
            (btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
      } else {
         ast_log(LOG_WARNING, "Unknown addon type '%s' found.  Skipping.\n", a->type);
      }
   }
   AST_LIST_UNLOCK(&d->addons);

   return btn;
}

static struct skinny_req *req_alloc(size_t size, int response_message)
{
   struct skinny_req *req;

   if (!(req = ast_calloc(1, skinny_header_size + size + 4)))
      return NULL;

   req->len = htolel(size+4);
   req->e = htolel(response_message);

   return req;
}

static struct skinny_line *find_line_by_instance(struct skinny_device *d, int instance)
{
   struct skinny_line *l;

   /*Dialing from on hook or on a 7920 uses instance 0 in requests
     but we need to start looking at instance 1 */

   if (!instance)
      instance = 1;

   AST_LIST_TRAVERSE(&d->lines, l, list){
      if (l->instance == instance)
         break;
   }

   if (!l) {
      ast_log(LOG_WARNING, "Could not find line with instance '%d' on device '%s'\n", instance, d->name);
   }
   return l;
}

static struct skinny_line *find_line_by_name(const char *dest)
{
   struct skinny_line *l;
   struct skinny_line *tmpl = NULL;
   struct skinny_device *d;
   char line[256];
   char *at;
   char *device;
   int checkdevice = 0;

   ast_copy_string(line, dest, sizeof(line));
   at = strchr(line, '@');
   if (at)
      *at++ = '\0';
   device = at;

   if (!ast_strlen_zero(device))
      checkdevice = 1;

   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE(&devices, d, list){
      if (checkdevice && tmpl)
         break;
      else if (!checkdevice) {
         /* This is a match, since we're checking for line on every device. */
      } else if (!strcasecmp(d->name, device)) {
         if (skinnydebug)
            ast_verb(2, "Found device: %s\n", d->name);
      } else
         continue;

      /* Found the device (or we don't care which device) */
      AST_LIST_TRAVERSE(&d->lines, l, list){
         /* Search for the right line */
         if (!strcasecmp(l->name, line)) {
            if (tmpl) {
               ast_verb(2, "Ambiguous line name: %s\n", line);
               AST_LIST_UNLOCK(&devices);
               return NULL;
            } else
               tmpl = l;
         }
      }
   }
   AST_LIST_UNLOCK(&devices);
   return tmpl;
}

static struct skinny_subline *find_subline_by_name(const char *dest)
{
   struct skinny_line *l;
   struct skinny_subline *subline;
   struct skinny_subline *tmpsubline = NULL;
   struct skinny_device *d;

   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE(&devices, d, list){
      AST_LIST_TRAVERSE(&d->lines, l, list){
         AST_LIST_TRAVERSE(&l->sublines, subline, list){
            if (!strcasecmp(subline->name, dest)) {
               if (tmpsubline) {
                  ast_verb(2, "Ambiguous subline name: %s\n", dest);
                  AST_LIST_UNLOCK(&devices);
                  return NULL;
               } else
                  tmpsubline = subline;
            }
         }
      }
   }
   AST_LIST_UNLOCK(&devices);
   return tmpsubline;
}

static struct skinny_subline *find_subline_by_callid(struct skinny_device *d, int callid)
{
   struct skinny_subline *subline;
   struct skinny_line *l;
   
   AST_LIST_TRAVERSE(&d->lines, l, list){
      AST_LIST_TRAVERSE(&l->sublines, subline, list){
         if (subline->callid == callid) {
            return subline;
         }
      }
   }
   return NULL;
}

/*!
 * implement the setvar config line
 */
static struct ast_variable *add_var(const char *buf, struct ast_variable *list)
{
   struct ast_variable *tmpvar = NULL;
   char *varname = ast_strdupa(buf), *varval = NULL;

   if ((varval = strchr(varname,'='))) {
      *varval++ = '\0';
      if ((tmpvar = ast_variable_new(varname, varval, ""))) {
         tmpvar->next = list;
         list = tmpvar;
      }
   }
   return list;
}

static int skinny_sched_del(int sched_id)
{
   return ast_sched_del(sched, sched_id);
}

static int skinny_sched_add(int when, ast_sched_cb callback, const void *data)
{
   return ast_sched_add(sched, when, callback, data);
}

/* It's quicker/easier to find the subchannel when we know the instance number too */
static struct skinny_subchannel *find_subchannel_by_instance_reference(struct skinny_device *d, int instance, int reference)
{
   struct skinny_line *l = find_line_by_instance(d, instance);
   struct skinny_subchannel *sub;

   if (!l) {
      return NULL;
   }

   /* 7920 phones set call reference to 0, so use the first
      sub-channel on the list.
           This MIGHT need more love to be right */
   if (!reference)
      sub = AST_LIST_FIRST(&l->sub);
   else {
      AST_LIST_TRAVERSE(&l->sub, sub, list) {
         if (sub->callid == reference)
            break;
      }
   }
   if (!sub) {
      ast_log(LOG_WARNING, "Could not find subchannel with reference '%d' on '%s'\n", reference, d->name);
   }
   return sub;
}

/* Find the subchannel when we only have the callid - this shouldn't happen often */
static struct skinny_subchannel *find_subchannel_by_reference(struct skinny_device *d, int reference)
{
   struct skinny_line *l;
   struct skinny_subchannel *sub = NULL;

   AST_LIST_TRAVERSE(&d->lines, l, list){
      AST_LIST_TRAVERSE(&l->sub, sub, list){
         if (sub->callid == reference)
            break;
      }
      if (sub)
         break;
   }

   if (!l) {
      ast_log(LOG_WARNING, "Could not find any lines that contained a subchannel with reference '%d' on device '%s'\n", reference, d->name);
   } else {
      if (!sub) {
         ast_log(LOG_WARNING, "Could not find subchannel with reference '%d' on '%s@%s'\n", reference, l->name, d->name);
      }
   }
   return sub;
}

static struct skinny_speeddial *find_speeddial_by_instance(struct skinny_device *d, int instance, int isHint)
{
   struct skinny_speeddial *sd;

   AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
      if (sd->isHint == isHint && sd->instance == instance)
         break;
   }

   if (!sd) {
      ast_log(LOG_WARNING, "Could not find speeddial with instance '%d' on device '%s'\n", instance, d->name);
   }
   return sd;
}

static struct ast_format *codec_skinny2ast(enum skinny_codecs skinnycodec, struct ast_format *result)
{
   switch (skinnycodec) {
   case SKINNY_CODEC_ALAW:
      return ast_format_set(result, AST_FORMAT_ALAW, 0);
   case SKINNY_CODEC_ULAW:
      return ast_format_set(result, AST_FORMAT_ULAW, 0);
   case SKINNY_CODEC_G723_1:
      return ast_format_set(result, AST_FORMAT_G723_1, 0);
   case SKINNY_CODEC_G729A:
      return ast_format_set(result, AST_FORMAT_G729A, 0);
   case SKINNY_CODEC_G726_32:
      return ast_format_set(result, AST_FORMAT_G726_AAL2, 0); /* XXX Is this right? */
   case SKINNY_CODEC_H261:
      return ast_format_set(result, AST_FORMAT_H261, 0);
   case SKINNY_CODEC_H263:
      return ast_format_set(result, AST_FORMAT_H263 ,0);
   default:
      ast_format_clear(result);
      return result;
   }
}

static int codec_ast2skinny(const struct ast_format *astcodec)
{
   switch (astcodec->id) {
   case AST_FORMAT_ALAW:
      return SKINNY_CODEC_ALAW;
   case AST_FORMAT_ULAW:
      return SKINNY_CODEC_ULAW;
   case AST_FORMAT_G723_1:
      return SKINNY_CODEC_G723_1;
   case AST_FORMAT_G729A:
      return SKINNY_CODEC_G729A;
   case AST_FORMAT_G726_AAL2: /* XXX Is this right? */
      return SKINNY_CODEC_G726_32;
   case AST_FORMAT_H261:
      return SKINNY_CODEC_H261;
   case AST_FORMAT_H263:
      return SKINNY_CODEC_H263;
   default:
      return 0;
   }
}

static int set_callforwards(struct skinny_line *l, const char *cfwd, int cfwdtype)
{
   if (!l)
      return 0;

   if (!ast_strlen_zero(cfwd)) {
      if (cfwdtype & SKINNY_CFWD_ALL) {
         l->cfwdtype |= SKINNY_CFWD_ALL;
         ast_copy_string(l->call_forward_all, cfwd, sizeof(l->call_forward_all));
      }
      if (cfwdtype & SKINNY_CFWD_BUSY) {
         l->cfwdtype |= SKINNY_CFWD_BUSY;
         ast_copy_string(l->call_forward_busy, cfwd, sizeof(l->call_forward_busy));
      }
      if (cfwdtype & SKINNY_CFWD_NOANSWER) {
         l->cfwdtype |= SKINNY_CFWD_NOANSWER;
         ast_copy_string(l->call_forward_noanswer, cfwd, sizeof(l->call_forward_noanswer));
      }
   } else {
      if (cfwdtype & SKINNY_CFWD_ALL) {
         l->cfwdtype &= ~SKINNY_CFWD_ALL;
         memset(l->call_forward_all, 0, sizeof(l->call_forward_all));
      }
      if (cfwdtype & SKINNY_CFWD_BUSY) {
         l->cfwdtype &= ~SKINNY_CFWD_BUSY;
         memset(l->call_forward_busy, 0, sizeof(l->call_forward_busy));
      }
      if (cfwdtype & SKINNY_CFWD_NOANSWER) {
         l->cfwdtype &= ~SKINNY_CFWD_NOANSWER;
         memset(l->call_forward_noanswer, 0, sizeof(l->call_forward_noanswer));
      }
   }
   return l->cfwdtype;
}

static void cleanup_stale_contexts(char *new, char *old)
{
   char *oldcontext, *newcontext, *stalecontext, *stringp, newlist[AST_MAX_CONTEXT];

   while ((oldcontext = strsep(&old, "&"))) {
      stalecontext = '\0';
      ast_copy_string(newlist, new, sizeof(newlist));
      stringp = newlist;
      while ((newcontext = strsep(&stringp, "&"))) {
         if (strcmp(newcontext, oldcontext) == 0) {
            /* This is not the context you're looking for */
            stalecontext = '\0';
            break;
         } else if (strcmp(newcontext, oldcontext)) {
            stalecontext = oldcontext;
         }
         
      }
      if (stalecontext)
         ast_context_destroy(ast_context_find(stalecontext), "Skinny");
   }
}

static void register_exten(struct skinny_line *l)
{
   char multi[256];
   char *stringp, *ext, *context;

   if (ast_strlen_zero(regcontext))
      return;

   ast_copy_string(multi, S_OR(l->regexten, l->name), sizeof(multi));
   stringp = multi;
   while ((ext = strsep(&stringp, "&"))) {
      if ((context = strchr(ext, '@'))) {
         *context++ = '\0'; /* split ext@context */
         if (!ast_context_find(context)) {
            ast_log(LOG_WARNING, "Context %s must exist in regcontext= in skinny.conf!\n", context);
            continue;
         }
      } else {
         context = regcontext;
      }
      ast_add_extension(context, 1, ext, 1, NULL, NULL, "Noop",
          ast_strdup(l->name), ast_free_ptr, "Skinny");
   }
}

static void unregister_exten(struct skinny_line *l)
{
   char multi[256];
   char *stringp, *ext, *context;

   if (ast_strlen_zero(regcontext))
      return;

   ast_copy_string(multi, S_OR(l->regexten, l->name), sizeof(multi));
   stringp = multi;
   while ((ext = strsep(&stringp, "&"))) {
      if ((context = strchr(ext, '@'))) {
         *context++ = '\0'; /* split ext@context */
         if (!ast_context_find(context)) {
            ast_log(LOG_WARNING, "Context %s must exist in regcontext= in skinny.conf!\n", context);
            continue;
         }
      } else {
         context = regcontext;
      }
      ast_context_remove_extension(context, ext, 1, NULL);
   }
}

static int skinny_register(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d;
   struct skinny_line *l;
   struct skinny_subline *subline;
   struct skinny_speeddial *sd;
   struct sockaddr_in sin;
   socklen_t slen;
   int instance;

   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE(&devices, d, list){
      struct ast_sockaddr addr;
      ast_sockaddr_from_sin(&addr, &s->sin);
      if (!strcasecmp(req->data.reg.name, d->id)
            && ast_apply_ha(d->ha, &addr)) {
         s->device = d;
         d->type = letohl(req->data.reg.type);
         d->protocolversion = letohl(req->data.reg.protocolVersion);
         if (ast_strlen_zero(d->version_id)) {
            ast_copy_string(d->version_id, version_id, sizeof(d->version_id));
         }
         d->registered = 1;
         d->session = s;

         slen = sizeof(sin);
         if (getsockname(s->fd, (struct sockaddr *)&sin, &slen)) {
            ast_log(LOG_WARNING, "Cannot get socket name\n");
            sin.sin_addr = __ourip;
         }
         d->ourip = sin.sin_addr;

         AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
            sd->stateid = ast_extension_state_add(sd->context, sd->exten, skinny_extensionstate_cb, sd->container);
         }
         instance = 0;
         AST_LIST_TRAVERSE(&d->lines, l, list) {
            instance++;
         }
         AST_LIST_TRAVERSE(&d->lines, l, list) {
            /* FIXME: All sorts of issues will occur if this line is already connected to a device */
            if (l->device) {
               manager_event(EVENT_FLAG_SYSTEM, "PeerStatus", "ChannelType: Skinny\r\nPeer: Skinny/%s@%s\r\nPeerStatus: Rejected\r\nCause: LINE_ALREADY_CONNECTED\r\n", l->name, l->device->name); 
               ast_verb(1, "Line %s already connected to %s. Not connecting to %s.\n", l->name, l->device->name, d->name);
            } else {
               l->device = d;
               ast_format_cap_joint_copy(l->confcap, d->cap, l->cap);
               l->prefs = l->confprefs;
               if (!l->prefs.order[0]) {
                  l->prefs = d->confprefs;
               }
               /* l->capability = d->capability;
               l->prefs = d->prefs; */
               l->instance = instance;
               l->newmsgs = ast_app_has_voicemail(l->mailbox, NULL);
               set_callforwards(l, NULL, 0);
               manager_event(EVENT_FLAG_SYSTEM, "PeerStatus", "ChannelType: Skinny\r\nPeer: Skinny/%s@%s\r\nPeerStatus: Registered\r\n", l->name, d->name);
               register_exten(l);
               /* initialize MWI on line and device */
               mwi_event_cb(0, l);
               AST_LIST_TRAVERSE(&l->sublines, subline, list) {
                  ast_extension_state_add(subline->context, subline->exten, skinny_extensionstate_cb, subline->container);
               }
               ast_devstate_changed(AST_DEVICE_NOT_INUSE, "Skinny/%s", l->name);
            }
            --instance;
         }
         break;
      }
   }
   AST_LIST_UNLOCK(&devices);
   if (!d) {
      return 0;
   }
   return 1;
}

static int skinny_unregister(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d;
   struct skinny_line *l;
   struct skinny_speeddial *sd;

   d = s->device;

   if (d) {
      d->session = NULL;
      d->registered = 0;

      AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
         if (sd->stateid > -1)
            ast_extension_state_del(sd->stateid, NULL);
      }
      AST_LIST_TRAVERSE(&d->lines, l, list) {
         if (l->device == d) {
            l->device = NULL;
            ast_format_cap_remove_all(l->cap);
            ast_parse_allow_disallow(&l->prefs, l->cap, "all", 0);
            l->instance = 0;
            manager_event(EVENT_FLAG_SYSTEM, "PeerStatus", "ChannelType: Skinny\r\nPeer: Skinny/%s@%s\r\nPeerStatus: Unregistered\r\n", l->name, d->name);
            unregister_exten(l);
            ast_devstate_changed(AST_DEVICE_UNAVAILABLE, "Skinny/%s", l->name);
         }
      }
   }

   return -1; /* main loop will destroy the session */
}

#ifdef SKINNY_DEVMODE
static char *message2str(int type)
{
   char *tmp;

   switch (letohl(type)) {
   case KEEP_ALIVE_MESSAGE:
      return "KEEP_ALIVE_MESSAGE";
   case REGISTER_MESSAGE:
      return "REGISTER_MESSAGE";
   case IP_PORT_MESSAGE:
      return "IP_PORT_MESSAGE";
   case KEYPAD_BUTTON_MESSAGE:
      return "KEYPAD_BUTTON_MESSAGE";
   case ENBLOC_CALL_MESSAGE:
      return "ENBLOC_CALL_MESSAGE";
   case STIMULUS_MESSAGE:
      return "STIMULUS_MESSAGE";
   case OFFHOOK_MESSAGE:
      return "OFFHOOK_MESSAGE";
   case ONHOOK_MESSAGE:
      return "ONHOOK_MESSAGE";
   case CAPABILITIES_RES_MESSAGE:
      return "CAPABILITIES_RES_MESSAGE";
   case SPEED_DIAL_STAT_REQ_MESSAGE:
      return "SPEED_DIAL_STAT_REQ_MESSAGE";
   case LINE_STATE_REQ_MESSAGE:
      return "LINE_STATE_REQ_MESSAGE";
   case TIME_DATE_REQ_MESSAGE:
      return "TIME_DATE_REQ_MESSAGE";
   case BUTTON_TEMPLATE_REQ_MESSAGE:
      return "BUTTON_TEMPLATE_REQ_MESSAGE";
   case VERSION_REQ_MESSAGE:
      return "VERSION_REQ_MESSAGE";
   case SERVER_REQUEST_MESSAGE:
      return "SERVER_REQUEST_MESSAGE";
   case ALARM_MESSAGE:
      return "ALARM_MESSAGE";
   case OPEN_RECEIVE_CHANNEL_ACK_MESSAGE:
      return "OPEN_RECEIVE_CHANNEL_ACK_MESSAGE";
   case SOFT_KEY_SET_REQ_MESSAGE:
      return "SOFT_KEY_SET_REQ_MESSAGE";
   case SOFT_KEY_EVENT_MESSAGE:
      return "SOFT_KEY_EVENT_MESSAGE";
   case UNREGISTER_MESSAGE:
      return "UNREGISTER_MESSAGE";
   case SOFT_KEY_TEMPLATE_REQ_MESSAGE:
      return "SOFT_KEY_TEMPLATE_REQ_MESSAGE";
   case HEADSET_STATUS_MESSAGE:
      return "HEADSET_STATUS_MESSAGE";
   case REGISTER_AVAILABLE_LINES_MESSAGE:
      return "REGISTER_AVAILABLE_LINES_MESSAGE";
   case REGISTER_ACK_MESSAGE:
      return "REGISTER_ACK_MESSAGE";
   case START_TONE_MESSAGE:
      return "START_TONE_MESSAGE";
   case STOP_TONE_MESSAGE:
      return "STOP_TONE_MESSAGE";
   case SET_RINGER_MESSAGE:
      return "SET_RINGER_MESSAGE";
   case SET_LAMP_MESSAGE:
      return "SET_LAMP_MESSAGE";
   case SET_SPEAKER_MESSAGE:
      return "SET_SPEAKER_MESSAGE";
   case SET_MICROPHONE_MESSAGE:
      return "SET_MICROPHONE_MESSAGE";
   case START_MEDIA_TRANSMISSION_MESSAGE:
      return "START_MEDIA_TRANSMISSION_MESSAGE";
   case STOP_MEDIA_TRANSMISSION_MESSAGE:
      return "STOP_MEDIA_TRANSMISSION_MESSAGE";
   case CALL_INFO_MESSAGE:
      return "CALL_INFO_MESSAGE";
   case FORWARD_STAT_MESSAGE:
      return "FORWARD_STAT_MESSAGE";
   case SPEED_DIAL_STAT_RES_MESSAGE:
      return "SPEED_DIAL_STAT_RES_MESSAGE";
   case LINE_STAT_RES_MESSAGE:
      return "LINE_STAT_RES_MESSAGE";
   case DEFINETIMEDATE_MESSAGE:
      return "DEFINETIMEDATE_MESSAGE";
   case BUTTON_TEMPLATE_RES_MESSAGE:
      return "BUTTON_TEMPLATE_RES_MESSAGE";
   case VERSION_RES_MESSAGE:
      return "VERSION_RES_MESSAGE";
   case DISPLAYTEXT_MESSAGE:
      return "DISPLAYTEXT_MESSAGE";
   case CLEAR_NOTIFY_MESSAGE:
      return "CLEAR_NOTIFY_MESSAGE";
   case CLEAR_DISPLAY_MESSAGE:
      return "CLEAR_DISPLAY_MESSAGE";
   case CAPABILITIES_REQ_MESSAGE:
      return "CAPABILITIES_REQ_MESSAGE";
   case REGISTER_REJ_MESSAGE:
      return "REGISTER_REJ_MESSAGE";
   case SERVER_RES_MESSAGE:
      return "SERVER_RES_MESSAGE";
   case RESET_MESSAGE:
      return "RESET_MESSAGE";
   case KEEP_ALIVE_ACK_MESSAGE:
      return "KEEP_ALIVE_ACK_MESSAGE";
   case OPEN_RECEIVE_CHANNEL_MESSAGE:
      return "OPEN_RECEIVE_CHANNEL_MESSAGE";
   case CLOSE_RECEIVE_CHANNEL_MESSAGE:
      return "CLOSE_RECEIVE_CHANNEL_MESSAGE";
   case SOFT_KEY_TEMPLATE_RES_MESSAGE:
      return "SOFT_KEY_TEMPLATE_RES_MESSAGE";
   case SOFT_KEY_SET_RES_MESSAGE:
      return "SOFT_KEY_SET_RES_MESSAGE";
   case SELECT_SOFT_KEYS_MESSAGE:
      return "SELECT_SOFT_KEYS_MESSAGE";
   case CALL_STATE_MESSAGE:
      return "CALL_STATE_MESSAGE";
   case DISPLAY_PROMPT_STATUS_MESSAGE:
      return "DISPLAY_PROMPT_STATUS_MESSAGE";
   case CLEAR_PROMPT_MESSAGE:
      return "CLEAR_PROMPT_MESSAGE";
   case DISPLAY_NOTIFY_MESSAGE:
      return "DISPLAY_NOTIFY_MESSAGE";
   case ACTIVATE_CALL_PLANE_MESSAGE:
      return "ACTIVATE_CALL_PLANE_MESSAGE";
   case DIALED_NUMBER_MESSAGE:
      return "DIALED_NUMBER_MESSAGE";
   default:
      if (!(tmp = ast_threadstorage_get(&message2str_threadbuf, MESSAGE2STR_BUFSIZE)))
         return "Unknown";
      snprintf(tmp, MESSAGE2STR_BUFSIZE, "UNKNOWN_MESSAGE-%d", type);
      return tmp;
   }
}

static char *callstate2str(int ind)
{
   char *tmp;

   switch (ind) {
   case SUBSTATE_OFFHOOK:
      return "SKINNY_OFFHOOK";
   case SKINNY_ONHOOK:
      return "SKINNY_ONHOOK";
   case SKINNY_RINGOUT:
      return "SKINNY_RINGOUT";
   case SKINNY_RINGIN:
      return "SKINNY_RINGIN";
   case SKINNY_CONNECTED:
      return "SKINNY_CONNECTED";
   case SKINNY_BUSY:
      return "SKINNY_BUSY";
   case SKINNY_CONGESTION:
      return "SKINNY_CONGESTION";
   case SKINNY_PROGRESS:
      return "SKINNY_PROGRESS";
   case SKINNY_HOLD:
      return "SKINNY_HOLD";
   case SKINNY_CALLWAIT:
      return "SKINNY_CALLWAIT";
   default:
      if (!(tmp = ast_threadstorage_get(&callstate2str_threadbuf, CALLSTATE2STR_BUFSIZE)))
                        return "Unknown";
      snprintf(tmp, CALLSTATE2STR_BUFSIZE, "UNKNOWN-%d", ind);
      return tmp;
   }
}

#endif

static int transmit_response_bysession(struct skinnysession *s, struct skinny_req *req)
{
   int res = 0;

   if (!s) {
      ast_log(LOG_WARNING, "Asked to transmit to a non-existent session!\n");
      return -1;
   }

   ast_mutex_lock(&s->lock);

   SKINNY_DEVONLY(if (skinnydebug>1) ast_verb(4, "Transmitting %s to %s\n", message2str(req->e), s->device->name);)

   if ((letohl(req->len) > SKINNY_MAX_PACKET) || (letohl(req->len) < 0)) {
      ast_log(LOG_WARNING, "transmit_response: the length of the request (%d) is out of bounds (%d)\n", letohl(req->len), SKINNY_MAX_PACKET);
      ast_mutex_unlock(&s->lock);
      return -1;
   }

   memset(s->outbuf, 0, sizeof(s->outbuf));
   memcpy(s->outbuf, req, skinny_header_size);
   memcpy(s->outbuf+skinny_header_size, &req->data, letohl(req->len));

   res = write(s->fd, s->outbuf, letohl(req->len)+8);
   
   if (res != letohl(req->len)+8) {
      ast_log(LOG_WARNING, "Transmit: write only sent %d out of %d bytes: %s\n", res, letohl(req->len)+8, strerror(errno));
      if (res == -1) {
         if (skinnydebug)
            ast_log(LOG_WARNING, "Transmit: Skinny Client was lost, unregistering\n");
         skinny_unregister(NULL, s);
      }
      
   }
   
   ast_free(req);
   ast_mutex_unlock(&s->lock);
   return 1;
}

static void transmit_response(struct skinny_device *d, struct skinny_req *req)
{
   transmit_response_bysession(d->session, req);
}

static void transmit_registerrej(struct skinnysession *s)
{
   struct skinny_req *req;
   char name[16];

   if (!(req = req_alloc(sizeof(struct register_rej_message), REGISTER_REJ_MESSAGE)))
      return;

   memcpy(&name, req->data.reg.name, sizeof(name));
   snprintf(req->data.regrej.errMsg, sizeof(req->data.regrej.errMsg), "No Authority: %s", name);

   transmit_response_bysession(s, req);
}  

static void transmit_speaker_mode(struct skinny_device *d, int mode)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct set_speaker_message), SET_SPEAKER_MESSAGE)))
      return;

   req->data.setspeaker.mode = htolel(mode);
   transmit_response(d, req);
}

static void transmit_microphone_mode(struct skinny_device *d, int mode)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct set_microphone_message), SET_MICROPHONE_MESSAGE)))
      return;

   req->data.setmicrophone.mode = htolel(mode);
   transmit_response(d, req);
}

//static void transmit_callinfo(struct skinny_subchannel *sub)
static void transmit_callinfo(struct skinny_device *d, int instance, int callid, char *fromname, char *fromnum, char *toname, char *tonum, int calldirection)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct call_info_message), CALL_INFO_MESSAGE)))
      return;

   if (skinnydebug) {
      ast_verb(1, "Setting Callinfo to %s(%s) from %s(%s) (dir=%d) on %s(%d)\n", toname, tonum, fromname, fromnum, calldirection, d->name, instance);
   }
   
   ast_copy_string(req->data.callinfo.callingPartyName, fromname, sizeof(req->data.callinfo.callingPartyName));
   ast_copy_string(req->data.callinfo.callingParty, fromnum, sizeof(req->data.callinfo.callingParty));
   ast_copy_string(req->data.callinfo.calledPartyName, toname, sizeof(req->data.callinfo.calledPartyName));
   ast_copy_string(req->data.callinfo.calledParty, tonum, sizeof(req->data.callinfo.calledParty));
   req->data.callinfo.instance = htolel(instance);
   req->data.callinfo.reference = htolel(callid);
   req->data.callinfo.type = htolel(calldirection);
   transmit_response(d, req);
}

static void send_callinfo(struct skinny_subchannel *sub)
{
   struct ast_channel *ast;
   struct skinny_device *d;
   struct skinny_line *l;
   char *fromname;
   char *fromnum;
   char *toname;
   char *tonum;

   if (!sub || !sub->owner || !sub->line || !sub->line->device) {
      return;
   }
   
   ast = sub->owner;
   l = sub->line;
   d = l->device;
   
   if (sub->calldirection == SKINNY_INCOMING) {
      fromname = S_COR(ast->connected.id.name.valid, ast->connected.id.name.str, "");
      fromnum = S_COR(ast->connected.id.number.valid, ast->connected.id.number.str, "");
      toname = S_COR(ast->caller.id.name.valid, ast->caller.id.name.str, "");
      tonum = S_COR(ast->caller.id.number.valid, ast->caller.id.number.str, "");
   } else if (sub->calldirection == SKINNY_OUTGOING) {
      fromname = S_COR(ast->caller.id.name.valid, ast->caller.id.name.str, "");
      fromnum = S_COR(ast->caller.id.number.valid, ast->caller.id.number.str, "");
      toname = S_COR(ast->connected.id.name.valid, ast->connected.id.name.str, l->lastnumberdialed);
      tonum = S_COR(ast->connected.id.number.valid, ast->connected.id.number.str, l->lastnumberdialed);
   } else {
      ast_verb(1, "Error sending Callinfo to %s(%d) - No call direction in sub\n", d->name, l->instance);
      return;
   }
   transmit_callinfo(d, l->instance, sub->callid, fromname, fromnum, toname, tonum, sub->calldirection);
}

static void push_callinfo(struct skinny_subline *subline, struct skinny_subchannel *sub)
{
   struct ast_channel *ast;
   struct skinny_device *d;
   struct skinny_line *l;
   char *fromname;
   char *fromnum;
   char *toname;
   char *tonum;

   if (!sub || !sub->owner || !sub->line || !sub->line->device) {
      return;
   }
   
   ast = sub->owner;
   l = sub->line;
   d = l->device;
   
   if (sub->calldirection == SKINNY_INCOMING) {
      fromname = S_COR(ast->connected.id.name.valid, ast->connected.id.name.str, "");
      fromnum = S_COR(ast->connected.id.number.valid, ast->connected.id.number.str, "");
      toname = S_COR(ast->caller.id.name.valid, ast->caller.id.name.str, "");
      tonum = S_COR(ast->caller.id.number.valid, ast->caller.id.number.str, "");
   } else if (sub->calldirection == SKINNY_OUTGOING) {
      fromname = S_COR(ast->caller.id.name.valid, ast->caller.id.name.str, "");
      fromnum = S_COR(ast->caller.id.number.valid, ast->caller.id.number.str, "");
      toname = S_COR(ast->connected.id.name.valid, ast->connected.id.name.str, l->lastnumberdialed);
      tonum = S_COR(ast->connected.id.number.valid, ast->connected.id.number.str, l->lastnumberdialed);
   } else {
      ast_verb(1, "Error sending Callinfo to %s(%d) - No call direction in sub\n", d->name, l->instance);
      return;
   }
   transmit_callinfo(subline->line->device, subline->line->instance, subline->callid, fromname, fromnum, toname, tonum, sub->calldirection);
}

static void transmit_connect(struct skinny_device *d, struct skinny_subchannel *sub)
{
   struct skinny_req *req;
   struct skinny_line *l = sub->line;
   struct ast_format_list fmt;
   struct ast_format tmpfmt;

   if (!(req = req_alloc(sizeof(struct open_receive_channel_message), OPEN_RECEIVE_CHANNEL_MESSAGE)))
      return;
   ast_best_codec(l->cap, &tmpfmt);
   fmt = ast_codec_pref_getsize(&l->prefs, &tmpfmt);

   req->data.openreceivechannel.conferenceId = htolel(sub->callid);
   req->data.openreceivechannel.partyId = htolel(sub->callid);
   req->data.openreceivechannel.packets = htolel(fmt.cur_ms);
   req->data.openreceivechannel.capability = htolel(codec_ast2skinny(&fmt.format));
   req->data.openreceivechannel.echo = htolel(0);
   req->data.openreceivechannel.bitrate = htolel(0);
   transmit_response(d, req);
}

static void transmit_start_tone(struct skinny_device *d, int tone, int instance, int reference)
{
   struct skinny_req *req;
   if (!(req = req_alloc(sizeof(struct start_tone_message), START_TONE_MESSAGE)))
      return;
   req->data.starttone.tone = htolel(tone);
   req->data.starttone.instance = htolel(instance);
   req->data.starttone.reference = htolel(reference);
   transmit_response(d, req);
}

static void transmit_stop_tone(struct skinny_device *d, int instance, int reference)
{
   struct skinny_req *req;
   if (!(req = req_alloc(sizeof(struct stop_tone_message), STOP_TONE_MESSAGE)))
      return;
   req->data.stoptone.instance = htolel(instance);
   req->data.stoptone.reference = htolel(reference);
   transmit_response(d, req);
}

static void transmit_selectsoftkeys(struct skinny_device *d, int instance, int callid, int softkey)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct select_soft_keys_message), SELECT_SOFT_KEYS_MESSAGE)))
      return;

   req->data.selectsoftkey.instance = htolel(instance);
   req->data.selectsoftkey.reference = htolel(callid);
   req->data.selectsoftkey.softKeySetIndex = htolel(softkey);
   req->data.selectsoftkey.validKeyMask = htolel(0xFFFFFFFF);
   transmit_response(d, req);
}

static void transmit_lamp_indication(struct skinny_device *d, int stimulus, int instance, int indication)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct set_lamp_message), SET_LAMP_MESSAGE)))
      return;

   req->data.setlamp.stimulus = htolel(stimulus);
   req->data.setlamp.stimulusInstance = htolel(instance);
   req->data.setlamp.deviceStimulus = htolel(indication);
   transmit_response(d, req);
}

static void transmit_ringer_mode(struct skinny_device *d, int mode)
{
   struct skinny_req *req;

   if (skinnydebug)
      ast_verb(1, "Setting ringer mode to '%d'.\n", mode);

   if (!(req = req_alloc(sizeof(struct set_ringer_message), SET_RINGER_MESSAGE)))
      return;

   req->data.setringer.ringerMode = htolel(mode);
   /* XXX okay, I don't quite know what this is, but here's what happens (on a 7960).
      Note: The phone will always show as ringing on the display.

      1: phone will audibly ring over and over
      2: phone will audibly ring only once
      any other value, will NOT cause the phone to audibly ring
   */
   req->data.setringer.unknown1 = htolel(1);
   /* XXX the value here doesn't seem to change anything.  Must be higher than 0.
      Perhaps a packet capture can shed some light on this. */
   req->data.setringer.unknown2 = htolel(1);
   transmit_response(d, req);
}

static void transmit_clear_display_message(struct skinny_device *d, int instance, int reference)
{
   struct skinny_req *req;
   if (!(req = req_alloc(sizeof(struct clear_display_message), CLEAR_DISPLAY_MESSAGE)))
      return;

   //what do we want hear CLEAR_DISPLAY_MESSAGE or CLEAR_PROMPT_STATUS???
   //if we are clearing the display, it appears there is no instance and refernece info (size 0)
   //req->data.clearpromptstatus.lineInstance = instance;
   //req->data.clearpromptstatus.callReference = reference;

   if (skinnydebug)
      ast_verb(1, "Clearing Display\n");
   transmit_response(d, req);
}

/* This function is not currently used, but will be (wedhorn)*/
/* static void transmit_display_message(struct skinny_device *d, const char *text, int instance, int reference)
{
   struct skinny_req *req;

   if (text == 0) {
      ast_verb(1, "Bug, Asked to display empty message\n");
      return;
   }

   if (!(req = req_alloc(sizeof(struct displaytext_message), DISPLAYTEXT_MESSAGE)))
      return;

   ast_copy_string(req->data.displaytext.text, text, sizeof(req->data.displaytext.text));
   if (skinnydebug)
      ast_verb(1, "Displaying message '%s'\n", req->data.displaytext.text);
   transmit_response(d, req);
} */

static void transmit_displaynotify(struct skinny_device *d, const char *text, int t)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct display_notify_message), DISPLAY_NOTIFY_MESSAGE)))
      return;

   ast_copy_string(req->data.displaynotify.displayMessage, text, sizeof(req->data.displaynotify.displayMessage));
   req->data.displaynotify.displayTimeout = htolel(t);

   if (skinnydebug)
      ast_verb(1, "Displaying notify '%s'\n", text);

   transmit_response(d, req);
}

static void transmit_displaypromptstatus(struct skinny_device *d, const char *text, int t, int instance, int callid)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct display_prompt_status_message), DISPLAY_PROMPT_STATUS_MESSAGE)))
      return;

   ast_copy_string(req->data.displaypromptstatus.promptMessage, text, sizeof(req->data.displaypromptstatus.promptMessage));
   req->data.displaypromptstatus.messageTimeout = htolel(t);
   req->data.displaypromptstatus.lineInstance = htolel(instance);
   req->data.displaypromptstatus.callReference = htolel(callid);

   if (skinnydebug)
      ast_verb(1, "Displaying Prompt Status '%s'\n", text);

   transmit_response(d, req);
}

static void transmit_clearpromptmessage(struct skinny_device *d, int instance, int callid)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct clear_prompt_message), CLEAR_PROMPT_MESSAGE)))
      return;

   req->data.clearpromptstatus.lineInstance = htolel(instance);
   req->data.clearpromptstatus.callReference = htolel(callid);

   if (skinnydebug)
      ast_verb(1, "Clearing Prompt\n");

   transmit_response(d, req);
}

static void transmit_dialednumber(struct skinny_device *d, const char *text, int instance, int callid)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct dialed_number_message), DIALED_NUMBER_MESSAGE)))
      return;

   ast_copy_string(req->data.dialednumber.dialedNumber, text, sizeof(req->data.dialednumber.dialedNumber));
   req->data.dialednumber.lineInstance = htolel(instance);
   req->data.dialednumber.callReference = htolel(callid);

   transmit_response(d, req);
}

static void transmit_closereceivechannel(struct skinny_device *d, struct skinny_subchannel *sub)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct close_receive_channel_message), CLOSE_RECEIVE_CHANNEL_MESSAGE)))
      return;

   req->data.closereceivechannel.conferenceId = htolel(0);
   req->data.closereceivechannel.partyId = htolel(sub->callid);
   transmit_response(d, req);
}

static void transmit_stopmediatransmission(struct skinny_device *d, struct skinny_subchannel *sub)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct stop_media_transmission_message), STOP_MEDIA_TRANSMISSION_MESSAGE)))
      return;

   req->data.stopmedia.conferenceId = htolel(0);
   req->data.stopmedia.passThruPartyId = htolel(sub->callid);
   transmit_response(d, req);
}

static void transmit_startmediatransmission(struct skinny_device *d, struct skinny_subchannel *sub, struct sockaddr_in dest, struct ast_format_list fmt)
{
   struct skinny_req *req;

   if (d->protocolversion < 17) {
      if (!(req = req_alloc(sizeof(struct start_media_transmission_message_ip4), START_MEDIA_TRANSMISSION_MESSAGE)))
         return;
      req->data.startmedia_ip4.conferenceId = htolel(sub->callid);
      req->data.startmedia_ip4.passThruPartyId = htolel(sub->callid);
      req->data.startmedia_ip4.remoteIp = dest.sin_addr.s_addr;
      req->data.startmedia_ip4.remotePort = htolel(ntohs(dest.sin_port));
      req->data.startmedia_ip4.packetSize = htolel(fmt.cur_ms);
      req->data.startmedia_ip4.payloadType = htolel(codec_ast2skinny(&fmt.format));
      req->data.startmedia_ip4.qualifier.precedence = htolel(127);
      req->data.startmedia_ip4.qualifier.vad = htolel(0);
      req->data.startmedia_ip4.qualifier.packets = htolel(0);
      req->data.startmedia_ip4.qualifier.bitRate = htolel(0);
   } else {
      if (!(req = req_alloc(sizeof(struct start_media_transmission_message_ip6), START_MEDIA_TRANSMISSION_MESSAGE)))
         return;
      req->data.startmedia_ip6.conferenceId = htolel(sub->callid);
      req->data.startmedia_ip6.passThruPartyId = htolel(sub->callid);
      memcpy(req->data.startmedia_ip6.remoteIp, &dest.sin_addr.s_addr, sizeof(dest.sin_addr.s_addr));
      req->data.startmedia_ip6.remotePort = htolel(ntohs(dest.sin_port));
      req->data.startmedia_ip6.packetSize = htolel(fmt.cur_ms);
      req->data.startmedia_ip6.payloadType = htolel(codec_ast2skinny(&fmt.format));
      req->data.startmedia_ip6.qualifier.precedence = htolel(127);
      req->data.startmedia_ip6.qualifier.vad = htolel(0);
      req->data.startmedia_ip6.qualifier.packets = htolel(0);
      req->data.startmedia_ip6.qualifier.bitRate = htolel(0);
   }
   transmit_response(d, req);
}

static void transmit_activatecallplane(struct skinny_device *d, struct skinny_line *l)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct activate_call_plane_message), ACTIVATE_CALL_PLANE_MESSAGE)))
      return;

   req->data.activatecallplane.lineInstance = htolel(l->instance);
   transmit_response(d, req);
}

static void transmit_callstate(struct skinny_device *d, int buttonInstance, unsigned callid, int state)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct call_state_message), CALL_STATE_MESSAGE)))
      return;
   
#ifdef SKINNY_DEVMODE
   if (skinnydebug) {
      ast_verb(3, "Transmitting CALL_STATE_MESSAGE to %s - line %d, callid %d, state %s\n", d->name, buttonInstance, callid, callstate2str(state));
   }
#endif

   req->data.callstate.callState = htolel(state);
   req->data.callstate.lineInstance = htolel(buttonInstance);
   req->data.callstate.callReference = htolel(callid);
   transmit_response(d, req);
}

static void transmit_cfwdstate(struct skinny_device *d, struct skinny_line *l)
{
   struct skinny_req *req;
   int anyon = 0;

   if (!(req = req_alloc(sizeof(struct forward_stat_message), FORWARD_STAT_MESSAGE)))
      return;

   if (l->cfwdtype & SKINNY_CFWD_ALL) {
      if (!ast_strlen_zero(l->call_forward_all)) {
         ast_copy_string(req->data.forwardstat.fwdallnum, l->call_forward_all, sizeof(req->data.forwardstat.fwdallnum));
         req->data.forwardstat.fwdall = htolel(1);
         anyon++;
      } else {
         req->data.forwardstat.fwdall = htolel(0);
      }
   }
   if (l->cfwdtype & SKINNY_CFWD_BUSY) {
      if (!ast_strlen_zero(l->call_forward_busy)) {
         ast_copy_string(req->data.forwardstat.fwdbusynum, l->call_forward_busy, sizeof(req->data.forwardstat.fwdbusynum));
         req->data.forwardstat.fwdbusy = htolel(1);
         anyon++;
      } else {
         req->data.forwardstat.fwdbusy = htolel(0);
      }
   }
   if (l->cfwdtype & SKINNY_CFWD_NOANSWER) {
      if (!ast_strlen_zero(l->call_forward_noanswer)) {
         ast_copy_string(req->data.forwardstat.fwdnoanswernum, l->call_forward_noanswer, sizeof(req->data.forwardstat.fwdnoanswernum));
         req->data.forwardstat.fwdnoanswer = htolel(1);
         anyon++;
      } else {
         req->data.forwardstat.fwdnoanswer = htolel(0);
      }
   }
   req->data.forwardstat.lineNumber = htolel(l->instance);
   if (anyon)
      req->data.forwardstat.activeforward = htolel(7);
   else
      req->data.forwardstat.activeforward = htolel(0);

   transmit_response(d, req);
}

static void transmit_speeddialstatres(struct skinny_device *d, struct skinny_speeddial *sd)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct speed_dial_stat_res_message), SPEED_DIAL_STAT_RES_MESSAGE)))
      return;

   req->data.speeddialreq.speedDialNumber = htolel(sd->instance);
   ast_copy_string(req->data.speeddial.speedDialDirNumber, sd->exten, sizeof(req->data.speeddial.speedDialDirNumber));
   ast_copy_string(req->data.speeddial.speedDialDisplayName, sd->label, sizeof(req->data.speeddial.speedDialDisplayName));

   transmit_response(d, req);
}

//static void transmit_linestatres(struct skinny_device *d, struct skinny_line *l)
static void transmit_linestatres(struct skinny_device *d, int instance)
{
   struct skinny_req *req;
   struct skinny_line *l;
   struct skinny_speeddial *sd;

   if (!(req = req_alloc(sizeof(struct line_stat_res_message), LINE_STAT_RES_MESSAGE)))
      return;

   if ((l = find_line_by_instance(d, instance))) {
      req->data.linestat.lineNumber = letohl(l->instance);
      memcpy(req->data.linestat.lineDirNumber, l->name, sizeof(req->data.linestat.lineDirNumber));
      memcpy(req->data.linestat.lineDisplayName, l->label, sizeof(req->data.linestat.lineDisplayName));
   } else if ((sd = find_speeddial_by_instance(d, instance, 1))) {
      req->data.linestat.lineNumber = letohl(sd->instance);
      memcpy(req->data.linestat.lineDirNumber, sd->label, sizeof(req->data.linestat.lineDirNumber));
      memcpy(req->data.linestat.lineDisplayName, sd->label, sizeof(req->data.linestat.lineDisplayName));
   }
   transmit_response(d, req);
}

static void transmit_definetimedate(struct skinny_device *d)
{
   struct skinny_req *req;
   struct timeval now = ast_tvnow();
   struct ast_tm cmtime;

   if (!(req = req_alloc(sizeof(struct definetimedate_message), DEFINETIMEDATE_MESSAGE)))
      return;

   ast_localtime(&now, &cmtime, NULL);
   req->data.definetimedate.year = htolel(cmtime.tm_year+1900);
   req->data.definetimedate.month = htolel(cmtime.tm_mon+1);
   req->data.definetimedate.dayofweek = htolel(cmtime.tm_wday);
   req->data.definetimedate.day = htolel(cmtime.tm_mday);
   req->data.definetimedate.hour = htolel(cmtime.tm_hour);
   req->data.definetimedate.minute = htolel(cmtime.tm_min);
   req->data.definetimedate.seconds = htolel(cmtime.tm_sec);
   req->data.definetimedate.milliseconds = htolel(cmtime.tm_usec / 1000);
   req->data.definetimedate.timestamp = htolel(now.tv_sec);
   transmit_response(d, req);
}

static void transmit_versionres(struct skinny_device *d)
{
   struct skinny_req *req;
   if (!(req = req_alloc(sizeof(struct version_res_message), VERSION_RES_MESSAGE)))
      return;

   ast_copy_string(req->data.version.version, d->version_id, sizeof(req->data.version.version));
   transmit_response(d, req);
}

static void transmit_serverres(struct skinny_device *d)
{
   struct skinny_req *req;
   if (!(req = req_alloc(sizeof(struct server_res_message), SERVER_RES_MESSAGE)))
      return;

   memcpy(req->data.serverres.server[0].serverName, ourhost,
         sizeof(req->data.serverres.server[0].serverName));
   req->data.serverres.serverListenPort[0] = htolel(ourport);
   req->data.serverres.serverIpAddr[0] = htolel(d->ourip.s_addr);
   transmit_response(d, req);
}

static void transmit_softkeysetres(struct skinny_device *d)
{
   struct skinny_req *req;
   int i;
   int x;
   int y;
   const struct soft_key_definitions *softkeymode = soft_key_default_definitions;

   if (!(req = req_alloc(sizeof(struct soft_key_set_res_message), SOFT_KEY_SET_RES_MESSAGE)))
      return;

   req->data.softkeysets.softKeySetOffset = htolel(0);
   req->data.softkeysets.softKeySetCount = htolel(13);
   req->data.softkeysets.totalSoftKeySetCount = htolel(13);
   for (x = 0; x < sizeof(soft_key_default_definitions) / sizeof(struct soft_key_definitions); x++) {
      const uint8_t *defaults = softkeymode->defaults;
      /* XXX I wanted to get the size of the array dynamically, but that wasn't wanting to work.
         This will have to do for now. */
      for (y = 0; y < softkeymode->count; y++) {
         for (i = 0; i < (sizeof(soft_key_template_default) / sizeof(struct soft_key_template_definition)); i++) {
            if (defaults[y] == i+1) {
               req->data.softkeysets.softKeySetDefinition[softkeymode->mode].softKeyTemplateIndex[y] = (i+1);
               req->data.softkeysets.softKeySetDefinition[softkeymode->mode].softKeyInfoIndex[y] = htoles(i+301);
                    if (skinnydebug)   
                  ast_verbose("softKeySetDefinition : softKeyTemplateIndex: %d softKeyInfoIndex: %d\n", i+1, i+301);
            }
         }
      }
      softkeymode++;
   }
   transmit_response(d, req);
}

static void transmit_softkeytemplateres(struct skinny_device *d)
{
   struct skinny_req *req;
   if (!(req = req_alloc(sizeof(struct soft_key_template_res_message), SOFT_KEY_TEMPLATE_RES_MESSAGE)))
      return;

   req->data.softkeytemplate.softKeyOffset = htolel(0);
   req->data.softkeytemplate.softKeyCount = htolel(sizeof(soft_key_template_default) / sizeof(struct soft_key_template_definition));
   req->data.softkeytemplate.totalSoftKeyCount = htolel(sizeof(soft_key_template_default) / sizeof(struct soft_key_template_definition));
   memcpy(req->data.softkeytemplate.softKeyTemplateDefinition,
      soft_key_template_default,
      sizeof(soft_key_template_default));
   transmit_response(d, req);
}

static void transmit_reset(struct skinny_device *d, int fullrestart)
{
   struct skinny_req *req;
  
   if (!(req = req_alloc(sizeof(struct reset_message), RESET_MESSAGE)))
      return;
  
   if (fullrestart)
      req->data.reset.resetType = 2;
   else
      req->data.reset.resetType = 1;

   ast_verb(3, "%s device %s.\n", (fullrestart) ? "Restarting" : "Resetting", d->id);
   transmit_response(d, req);
}

static void transmit_keepaliveack(struct skinny_device *d)
{
   struct skinny_req *req;

   if (!(req = req_alloc(0, KEEP_ALIVE_ACK_MESSAGE)))
      return;

   transmit_response(d, req);
}

static void transmit_registerack(struct skinny_device *d)
{
   struct skinny_req *req;

   if (!(req = req_alloc(sizeof(struct register_ack_message), REGISTER_ACK_MESSAGE)))
      return;

   req->data.regack.res[0] = '0';
   req->data.regack.res[1] = '\0';
   req->data.regack.keepAlive = htolel(keep_alive);
   memcpy(req->data.regack.dateTemplate, date_format, sizeof(req->data.regack.dateTemplate));
   req->data.regack.res2[0] = '0';
   req->data.regack.res2[1] = '\0';
   req->data.regack.secondaryKeepAlive = htolel(keep_alive);

   transmit_response(d, req);
}

static void transmit_capabilitiesreq(struct skinny_device *d)
{
   struct skinny_req *req;

   if (!(req = req_alloc(0, CAPABILITIES_REQ_MESSAGE)))
      return;

   if (skinnydebug)
      ast_verb(1, "Requesting capabilities\n");

   transmit_response(d, req);
}

static int skinny_extensionstate_cb(const char *context, const char *exten, enum ast_extension_states state, void *data)
{
   struct skinny_container *container = data;
   struct skinny_device *d = NULL;
   char hint[AST_MAX_EXTENSION];

   if (container->type == SKINNY_SDCONTAINER) {
      struct skinny_speeddial *sd = container->data;
      d = sd->parent;

      if (skinnydebug) {
         ast_verb(2, "Got hint %s on speeddial %s\n", ast_extension_state2str(state), sd->label);
      }

      if (ast_get_hint(hint, sizeof(hint), NULL, 0, NULL, sd->context, sd->exten)) {
         /* If they are not registered, we will override notification and show no availability */
         if (ast_device_state(hint) == AST_DEVICE_UNAVAILABLE) {
            transmit_lamp_indication(d, STIMULUS_LINE, sd->instance, SKINNY_LAMP_FLASH);
            transmit_callstate(d, sd->instance, 0, SKINNY_ONHOOK);
            return 0;
         }
         switch (state) {
         case AST_EXTENSION_DEACTIVATED: /* Retry after a while */
         case AST_EXTENSION_REMOVED:     /* Extension is gone */
            ast_verb(2, "Extension state: Watcher for hint %s %s. Notify Device %s\n", exten, state == AST_EXTENSION_DEACTIVATED ? "deactivated" : "removed", d->name);
            sd->stateid = -1;
            transmit_lamp_indication(d, STIMULUS_LINE, sd->instance, SKINNY_LAMP_OFF);
            transmit_callstate(d, sd->instance, 0, SKINNY_ONHOOK);
            break;
         case AST_EXTENSION_RINGING:
         case AST_EXTENSION_UNAVAILABLE:
            transmit_lamp_indication(d, STIMULUS_LINE, sd->instance, SKINNY_LAMP_BLINK);
            transmit_callstate(d, sd->instance, 0, SKINNY_RINGIN);
            break;
         case AST_EXTENSION_BUSY: /* callstate = SKINNY_BUSY wasn't wanting to work - I'll settle for this */
         case AST_EXTENSION_INUSE:
            transmit_lamp_indication(d, STIMULUS_LINE, sd->instance, SKINNY_LAMP_ON);
            transmit_callstate(d, sd->instance, 0, SKINNY_CALLREMOTEMULTILINE);
            break;
         case AST_EXTENSION_ONHOLD:
            transmit_lamp_indication(d, STIMULUS_LINE, sd->instance, SKINNY_LAMP_WINK);
            transmit_callstate(d, sd->instance, 0, SKINNY_HOLD);
            break;
         case AST_EXTENSION_NOT_INUSE:
         default:
            transmit_lamp_indication(d, STIMULUS_LINE, sd->instance, SKINNY_LAMP_OFF);
            transmit_callstate(d, sd->instance, 0, SKINNY_ONHOOK);
            break;
         }
      }
      sd->laststate = state;
   } else if (container->type == SKINNY_SUBLINECONTAINER) {
      struct skinny_subline *subline = container->data;
      struct skinny_line *l = subline->line;
      d = l->device;

      if (skinnydebug) {
         ast_verb(2, "Got hint %s on subline %s (%s@%s)\n", ast_extension_state2str(state), subline->name, exten, context);
      }
      
      subline->extenstate = state;

      if (subline->callid == 0) {
         return 0;
      }

      switch (state) {
      case AST_EXTENSION_RINGING: /* Handled by normal ringin */
         break;
      case AST_EXTENSION_INUSE:
         if (subline->sub && (subline->sub->substate == SKINNY_CONNECTED)) { /* Device has a real call */
            transmit_callstate(d, l->instance, subline->callid, SKINNY_CONNECTED);
            transmit_selectsoftkeys(d, l->instance, subline->callid, KEYDEF_CONNECTED);
            transmit_displaypromptstatus(d, "Connected", 0, l->instance, subline->callid);
         } else { /* Some other device has active call */
            transmit_callstate(d, l->instance, subline->callid, SKINNY_CALLREMOTEMULTILINE);
            transmit_selectsoftkeys(d, l->instance, subline->callid, KEYDEF_SLACONNECTEDNOTACTIVE);
            transmit_displaypromptstatus(d, "In Use", 0, l->instance, subline->callid);
         }
         transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_ON);
         transmit_ringer_mode(d, SKINNY_RING_OFF);
         transmit_activatecallplane(d, l);
         break;
      case AST_EXTENSION_ONHOLD:
         transmit_callstate(d, l->instance, subline->callid, SKINNY_HOLD);
         transmit_selectsoftkeys(d, l->instance, subline->callid, KEYDEF_SLAHOLD);
         transmit_displaypromptstatus(d, "Hold", 0, l->instance, subline->callid);
         transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_BLINK);
         transmit_activatecallplane(d, l);
         break;
      case AST_EXTENSION_NOT_INUSE:
         transmit_callstate(d, l->instance, subline->callid, SKINNY_ONHOOK);
         transmit_selectsoftkeys(d, l->instance, subline->callid, KEYDEF_ONHOOK);
         transmit_clearpromptmessage(d, l->instance, subline->callid);
         transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_OFF);
         transmit_activatecallplane(d, l);
         subline->callid = 0;
         break;
      default:
         ast_log(LOG_WARNING, "AST_EXTENSION_STATE %s not configured\n", ast_extension_state2str(state));
      }
   } else {
      ast_log(LOG_WARNING, "Invalid data supplied to skinny_extensionstate_cb\n");
   }

   return 0;
}

static void update_connectedline(struct skinny_subchannel *sub, const void *data, size_t datalen)
{
   struct ast_channel *c = sub->owner;
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;

   if (!c->caller.id.number.valid
      || ast_strlen_zero(c->caller.id.number.str)
      || !c->connected.id.number.valid
      || ast_strlen_zero(c->connected.id.number.str))
      return;

   if (skinnydebug) {
      ast_verb(3,"Sub %d - Updating\n", sub->callid);
   }
   
   send_callinfo(sub);
   if (sub->owner->_state == AST_STATE_UP) {
      transmit_callstate(d, l->instance, sub->callid, SKINNY_CONNECTED);
      transmit_displaypromptstatus(d, "Connected", 0, l->instance, sub->callid);
   } else {
      if (sub->calldirection == SKINNY_INCOMING) {
         transmit_callstate(d, l->instance, sub->callid, SKINNY_RINGIN);
         transmit_displaypromptstatus(d, "Ring-In", 0, l->instance, sub->callid);
      } else {
         if (!sub->ringing) {
            transmit_callstate(d, l->instance, sub->callid, SKINNY_RINGOUT);
            transmit_displaypromptstatus(d, "Ring-Out", 0, l->instance, sub->callid);
            sub->ringing = 1;
         } else {
            transmit_callstate(d, l->instance, sub->callid, SKINNY_PROGRESS);
            transmit_displaypromptstatus(d, "Call Progress", 0, l->instance, sub->callid);
            sub->progress = 1;
         }
      }
   }
}

static void mwi_event_cb(const struct ast_event *event, void *userdata)
{
   struct skinny_line *l = userdata;
   struct skinny_device *d = l->device;
   if (d) {
      struct skinnysession *s = d->session;
      struct skinny_line *l2;
      int new_msgs = 0;
      int dev_msgs = 0;

      if (s) {
         if (event) {
            l->newmsgs = ast_event_get_ie_uint(event, AST_EVENT_IE_NEWMSGS);
         }

         if (l->newmsgs) {
            transmit_lamp_indication(d, STIMULUS_VOICEMAIL, l->instance, l->mwiblink?SKINNY_LAMP_BLINK:SKINNY_LAMP_ON);
         } else {
            transmit_lamp_indication(d, STIMULUS_VOICEMAIL, l->instance, SKINNY_LAMP_OFF);
         }

         /* find out wether the device lamp should be on or off */
         AST_LIST_TRAVERSE(&d->lines, l2, list) {
            if (l2->newmsgs) {
               dev_msgs++;
            }
         }

         if (dev_msgs) {
            transmit_lamp_indication(d, STIMULUS_VOICEMAIL, 0, d->mwiblink?SKINNY_LAMP_BLINK:SKINNY_LAMP_ON);
         } else {
            transmit_lamp_indication(d, STIMULUS_VOICEMAIL, 0, SKINNY_LAMP_OFF);
         }
         ast_verb(3, "Skinny mwi_event_cb found %d new messages\n", new_msgs);
      }
   }
}

/* I do not believe skinny can deal with video.
   Anyone know differently? */
/* Yes, it can.  Currently 7985 and Cisco VT Advantage do video. */
static enum ast_rtp_glue_result skinny_get_vrtp_peer(struct ast_channel *c, struct ast_rtp_instance **instance)
{
   struct skinny_subchannel *sub = NULL;

   if (!(sub = c->tech_pvt) || !(sub->vrtp))
      return AST_RTP_GLUE_RESULT_FORBID;

   ao2_ref(sub->vrtp, +1);
   *instance = sub->vrtp;

   return AST_RTP_GLUE_RESULT_REMOTE;
}

static enum ast_rtp_glue_result skinny_get_rtp_peer(struct ast_channel *c, struct ast_rtp_instance **instance)
{
   struct skinny_subchannel *sub = NULL;
   struct skinny_line *l;
   enum ast_rtp_glue_result res = AST_RTP_GLUE_RESULT_REMOTE;

   if (skinnydebug)
      ast_verb(1, "skinny_get_rtp_peer() Channel = %s\n", ast_channel_name(c));


   if (!(sub = c->tech_pvt))
      return AST_RTP_GLUE_RESULT_FORBID;

   ast_mutex_lock(&sub->lock);

   if (!(sub->rtp)){
      ast_mutex_unlock(&sub->lock);
      return AST_RTP_GLUE_RESULT_FORBID;
   }

   ao2_ref(sub->rtp, +1);
   *instance = sub->rtp;

   l = sub->line;

   if (!l->directmedia || l->nat){
      res = AST_RTP_GLUE_RESULT_LOCAL;
      if (skinnydebug)
         ast_verb(1, "skinny_get_rtp_peer() Using AST_RTP_GLUE_RESULT_LOCAL \n");
   }

   ast_mutex_unlock(&sub->lock);

   return res;

}

static int skinny_set_rtp_peer(struct ast_channel *c, struct ast_rtp_instance *rtp, struct ast_rtp_instance *vrtp, struct ast_rtp_instance *trtp, const struct ast_format_cap *codecs, int nat_active)
{
   struct skinny_subchannel *sub;
   struct skinny_line *l;
   struct skinny_device *d;
   struct ast_format_list fmt;
   struct sockaddr_in us = { 0, };
   struct sockaddr_in them = { 0, };
   struct ast_sockaddr them_tmp;
   struct ast_sockaddr us_tmp;
   
   sub = c->tech_pvt;

   if (c->_state != AST_STATE_UP)
      return 0;

   if (!sub) {
      return -1;
   }

   l = sub->line;
   d = l->device;

   if (rtp){
      struct ast_format tmpfmt;
      ast_rtp_instance_get_remote_address(rtp, &them_tmp);
      ast_sockaddr_to_sin(&them_tmp, &them);

      /* Shutdown any early-media or previous media on re-invite */
      transmit_stopmediatransmission(d, sub);
      
      if (skinnydebug)
         ast_verb(1, "Peerip = %s:%d\n", ast_inet_ntoa(them.sin_addr), ntohs(them.sin_port));

      ast_best_codec(l->cap, &tmpfmt);
      fmt = ast_codec_pref_getsize(&l->prefs, &tmpfmt);

      if (skinnydebug)
         ast_verb(1, "Setting payloadType to '%s' (%d ms)\n", ast_getformatname(&fmt.format), fmt.cur_ms);

      if (!(l->directmedia) || (l->nat)){
         ast_rtp_instance_get_local_address(rtp, &us_tmp);
         ast_sockaddr_to_sin(&us_tmp, &us);
         us.sin_addr.s_addr = us.sin_addr.s_addr ? us.sin_addr.s_addr : d->ourip.s_addr;
         transmit_startmediatransmission(d, sub, us, fmt);
      } else {
         transmit_startmediatransmission(d, sub, them, fmt);
      }

      return 0;
   }
   /* Need a return here to break the bridge */
   return 0;
}

static struct ast_rtp_glue skinny_rtp_glue = {
   .type = "Skinny",
   .get_rtp_info = skinny_get_rtp_peer,
   .get_vrtp_info = skinny_get_vrtp_peer,
   .update_peer = skinny_set_rtp_peer,
};

static char *handle_skinny_set_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch (cmd) {
   case CLI_INIT:
#ifdef SKINNY_DEVMODE
      e->command = "skinny set debug {off|on|packet}";
      e->usage =
         "Usage: skinny set debug {off|on|packet}\n"
         "       Enables/Disables dumping of Skinny packets for debugging purposes\n";
#else
      e->command = "skinny set debug {off|on}";
      e->usage =
         "Usage: skinny set debug {off|on}\n"
         "       Enables/Disables dumping of Skinny packets for debugging purposes\n";
#endif
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }
   
   if (a->argc != e->args)
      return CLI_SHOWUSAGE;

   if (!strncasecmp(a->argv[e->args - 1], "on", 2)) {
      skinnydebug = 1;
      ast_cli(a->fd, "Skinny Debugging Enabled\n");
      return CLI_SUCCESS;
   } else if (!strncasecmp(a->argv[e->args - 1], "off", 3)) {
      skinnydebug = 0;
      ast_cli(a->fd, "Skinny Debugging Disabled\n");
      return CLI_SUCCESS;
#ifdef SKINNY_DEVMODE
   } else if (!strncasecmp(a->argv[e->args - 1], "packet", 6)) {
      skinnydebug = 2;
      ast_cli(a->fd, "Skinny Debugging Enabled including Packets\n");
      return CLI_SUCCESS;
#endif
   } else {
      return CLI_SHOWUSAGE;
   }
}

static char *handle_skinny_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch (cmd) {
   case CLI_INIT:
      e->command = "skinny reload";
      e->usage =
         "Usage: skinny reload\n"
         "       Reloads the chan_skinny configuration\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }
   
   if (a->argc != e->args)
      return CLI_SHOWUSAGE;

   skinny_reload();
   return CLI_SUCCESS;

}

static char *complete_skinny_devices(const char *word, int state)
{
   struct skinny_device *d;
   char *result = NULL;
   int wordlen = strlen(word), which = 0;

   AST_LIST_TRAVERSE(&devices, d, list) {
      if (!strncasecmp(word, d->id, wordlen) && ++which > state)
         result = ast_strdup(d->id);
   }

   return result;
}

static char *complete_skinny_show_device(const char *line, const char *word, int pos, int state)
{
   return (pos == 3 ? ast_strdup(complete_skinny_devices(word, state)) : NULL);
}

static char *complete_skinny_reset(const char *line, const char *word, int pos, int state)
{
   return (pos == 2 ? ast_strdup(complete_skinny_devices(word, state)) : NULL);
}

static char *complete_skinny_show_line(const char *line, const char *word, int pos, int state)
{
   struct skinny_device *d;
   struct skinny_line *l;
   char *result = NULL;
   int wordlen = strlen(word), which = 0;

   if (pos != 3)
      return NULL;
   
   AST_LIST_TRAVERSE(&devices, d, list) {
      AST_LIST_TRAVERSE(&d->lines, l, list) {
         if (!strncasecmp(word, l->name, wordlen) && ++which > state)
            result = ast_strdup(l->name);
      }
   }

   return result;
}

static char *handle_skinny_reset(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   struct skinny_device *d;

   switch (cmd) {
   case CLI_INIT:
      e->command = "skinny reset";
      e->usage =
         "Usage: skinny reset <DeviceId|DeviceName|all> [restart]\n"
         "       Causes a Skinny device to reset itself, optionally with a full restart\n";
      return NULL;
   case CLI_GENERATE:
      return complete_skinny_reset(a->line, a->word, a->pos, a->n);
   }

   if (a->argc < 3 || a->argc > 4)
      return CLI_SHOWUSAGE;

   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE(&devices, d, list) {
      int fullrestart = 0;
      if (!strcasecmp(a->argv[2], d->id) || !strcasecmp(a->argv[2], d->name) || !strcasecmp(a->argv[2], "all")) {
         if (!(d->session))
            continue;

         if (a->argc == 4 && !strcasecmp(a->argv[3], "restart"))
            fullrestart = 1;
         
         transmit_reset(d, fullrestart);
      }
   }
   AST_LIST_UNLOCK(&devices);
   return CLI_SUCCESS;
}

static char *device2str(int type)
{
   char *tmp;

   switch (type) {
   case SKINNY_DEVICE_NONE:
      return "No Device";
   case SKINNY_DEVICE_30SPPLUS:
      return "30SP Plus";
   case SKINNY_DEVICE_12SPPLUS:
      return "12SP Plus";
   case SKINNY_DEVICE_12SP:
      return "12SP";
   case SKINNY_DEVICE_12:
      return "12";
   case SKINNY_DEVICE_30VIP:
      return "30VIP";
   case SKINNY_DEVICE_7910:
      return "7910";
   case SKINNY_DEVICE_7960:
      return "7960";
   case SKINNY_DEVICE_7940:
      return "7940";
   case SKINNY_DEVICE_7935:
      return "7935";
   case SKINNY_DEVICE_ATA186:
      return "ATA186";
   case SKINNY_DEVICE_7941:
      return "7941";
   case SKINNY_DEVICE_7971:
      return "7971";
   case SKINNY_DEVICE_7914:
      return "7914";
   case SKINNY_DEVICE_7985:
      return "7985";
   case SKINNY_DEVICE_7911:
      return "7911";
   case SKINNY_DEVICE_7961GE:
      return "7961GE";
   case SKINNY_DEVICE_7941GE:
      return "7941GE";
   case SKINNY_DEVICE_7931:
      return "7931";
   case SKINNY_DEVICE_7921:
      return "7921";
   case SKINNY_DEVICE_7906:
      return "7906";
   case SKINNY_DEVICE_7962:
      return "7962";
   case SKINNY_DEVICE_7937:
      return "7937";
   case SKINNY_DEVICE_7942:
      return "7942";
   case SKINNY_DEVICE_7945:
      return "7945";
   case SKINNY_DEVICE_7965:
      return "7965";
   case SKINNY_DEVICE_7975:
      return "7975";
   case SKINNY_DEVICE_7905:
      return "7905";
   case SKINNY_DEVICE_7920:
      return "7920";
   case SKINNY_DEVICE_7970:
      return "7970";
   case SKINNY_DEVICE_7912:
      return "7912";
   case SKINNY_DEVICE_7902:
      return "7902";
   case SKINNY_DEVICE_CIPC:
      return "IP Communicator";
   case SKINNY_DEVICE_7961:
      return "7961";
   case SKINNY_DEVICE_7936:
      return "7936";
   case SKINNY_DEVICE_SCCPGATEWAY_AN:
      return "SCCPGATEWAY_AN";
   case SKINNY_DEVICE_SCCPGATEWAY_BRI:
      return "SCCPGATEWAY_BRI";
   case SKINNY_DEVICE_UNKNOWN:
      return "Unknown";
   default:
      if (!(tmp = ast_threadstorage_get(&device2str_threadbuf, DEVICE2STR_BUFSIZE)))
         return "Unknown";
      snprintf(tmp, DEVICE2STR_BUFSIZE, "UNKNOWN-%d", type);
      return tmp;
   }
}

/*! \brief Print codec list from preference to CLI/manager */
static void print_codec_to_cli(int fd, struct ast_codec_pref *pref)
{
   int x;
   struct ast_format tmpfmt;

   for(x = 0; x < 32 ; x++) {
      ast_codec_pref_index(pref, x, &tmpfmt);
      if (!tmpfmt.id)
         break;
      ast_cli(fd, "%s", ast_getformatname(&tmpfmt));
      ast_cli(fd, ":%d", pref->framing[x]);
      if (x < 31 && ast_codec_pref_index(pref, x + 1, &tmpfmt))
         ast_cli(fd, ",");
   }
   if (!x)
      ast_cli(fd, "none");
}

static char *_skinny_show_devices(int fd, int *total, struct mansession *s, const struct message *m, int argc, const char *argv[])
{
   struct skinny_device *d;
   struct skinny_line *l;
   const char *id;
   char idtext[256] = "";
   int total_devices = 0;

   if (s) { /* Manager - get ActionID */
      id = astman_get_header(m, "ActionID");
      if (!ast_strlen_zero(id))
         snprintf(idtext, sizeof(idtext), "ActionID: %s\r\n", id);
   }

   switch (argc) {
   case 3:
      break;
   default:
      return CLI_SHOWUSAGE;
   }

   if (!s) {
      ast_cli(fd, "Name                 DeviceId         IP              Type            R NL\n");
      ast_cli(fd, "-------------------- ---------------- --------------- --------------- - --\n");
   }

   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE(&devices, d, list) {
      int numlines = 0;
      total_devices++;
      AST_LIST_TRAVERSE(&d->lines, l, list) {
         numlines++;
      }
      if (!s) {
         ast_cli(fd, "%-20s %-16s %-15s %-15s %c %2d\n",
            d->name,
            d->id,
            d->session?ast_inet_ntoa(d->session->sin.sin_addr):"",
            device2str(d->type),
            d->registered?'Y':'N',
            numlines);
      } else {
         astman_append(s,
            "Event: DeviceEntry\r\n%s"
            "Channeltype: SKINNY\r\n"
            "ObjectName: %s\r\n"
            "ChannelObjectType: device\r\n"
            "DeviceId: %s\r\n"
            "IPaddress: %s\r\n"
            "Type: %s\r\n"
            "Devicestatus: %s\r\n"
            "NumberOfLines: %d\r\n",
            idtext,
            d->name,
            d->id,
            d->session?ast_inet_ntoa(d->session->sin.sin_addr):"-none-",
            device2str(d->type),
            d->registered?"registered":"unregistered",
            numlines);
      }
   }
   AST_LIST_UNLOCK(&devices);

   if (total)
      *total = total_devices;
   
   return CLI_SUCCESS;
}

/*! \brief  Show SKINNY devices in the manager API */
/*    Inspired from chan_sip */
static int manager_skinny_show_devices(struct mansession *s, const struct message *m)
{
   const char *id = astman_get_header(m, "ActionID");
   const char *a[] = {"skinny", "show", "devices"};
   char idtext[256] = "";
   int total = 0;

   if (!ast_strlen_zero(id))
      snprintf(idtext, sizeof(idtext), "ActionID: %s\r\n", id);

   astman_send_listack(s, m, "Device status list will follow", "start");
   /* List the devices in separate manager events */
   _skinny_show_devices(-1, &total, s, m, 3, a);
   /* Send final confirmation */
   astman_append(s,
   "Event: DevicelistComplete\r\n"
   "EventList: Complete\r\n"
   "ListItems: %d\r\n"
   "%s"
   "\r\n", total, idtext);
   return 0;
}

static char *handle_skinny_show_devices(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{

   switch (cmd) {
   case CLI_INIT:
      e->command = "skinny show devices";
      e->usage =
         "Usage: skinny show devices\n"
         "       Lists all devices known to the Skinny subsystem.\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }

   return _skinny_show_devices(a->fd, NULL, NULL, NULL, a->argc, (const char **) a->argv);
}

static char *_skinny_show_device(int type, int fd, struct mansession *s, const struct message *m, int argc, const char *argv[])
{
   struct skinny_device *d;
   struct skinny_line *l;
   struct skinny_speeddial *sd;
   struct skinny_addon *sa;
   char codec_buf[512];

   if (argc < 4) {
      return CLI_SHOWUSAGE;
   }

   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE(&devices, d, list) {
      if (!strcasecmp(argv[3], d->id) || !strcasecmp(argv[3], d->name)) {
         int numlines = 0, numaddons = 0, numspeeddials = 0;

         AST_LIST_TRAVERSE(&d->lines, l, list){
            numlines++;
         }

         AST_LIST_TRAVERSE(&d->addons, sa, list) {
            numaddons++;
         }

         AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
            numspeeddials++;
         }

         if (type == 0) { /* CLI */
            ast_cli(fd, "Name:        %s\n", d->name);
            ast_cli(fd, "Id:          %s\n", d->id);
            ast_cli(fd, "version:     %s\n", S_OR(d->version_id, "Unknown"));
            ast_cli(fd, "Ip address:  %s\n", (d->session ? ast_inet_ntoa(d->session->sin.sin_addr) : "Unknown"));
            ast_cli(fd, "Port:        %d\n", (d->session ? ntohs(d->session->sin.sin_port) : 0));
            ast_cli(fd, "Device Type: %s\n", device2str(d->type));
            ast_cli(fd, "Conf Codecs:");
            ast_getformatname_multiple(codec_buf, sizeof(codec_buf) - 1, d->confcap);
            ast_cli(fd, "%s\n", codec_buf);
            ast_cli(fd, "Neg Codecs: ");
            ast_getformatname_multiple(codec_buf, sizeof(codec_buf) - 1, d->cap);
            ast_cli(fd, "%s\n", codec_buf);
            ast_cli(fd, "Registered:  %s\n", (d->registered ? "Yes" : "No"));
            ast_cli(fd, "Lines:       %d\n", numlines);
            AST_LIST_TRAVERSE(&d->lines, l, list) {
               ast_cli(fd, "  %s (%s)\n", l->name, l->label);
            }
            AST_LIST_TRAVERSE(&d->addons, sa, list) {
               numaddons++;
            }  
            ast_cli(fd, "Addons:      %d\n", numaddons);
            AST_LIST_TRAVERSE(&d->addons, sa, list) {
               ast_cli(fd, "  %s\n", sa->type);
            }
            AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
               numspeeddials++;
            }
            ast_cli(fd, "Speeddials:  %d\n", numspeeddials);
            AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
               ast_cli(fd, "  %s (%s) ishint: %d\n", sd->exten, sd->label, sd->isHint);
            }
         } else { /* manager */
            astman_append(s, "Channeltype: SKINNY\r\n");
            astman_append(s, "ObjectName: %s\r\n", d->name);
            astman_append(s, "ChannelObjectType: device\r\n");
            astman_append(s, "Id: %s\r\n", d->id);
            astman_append(s, "version: %s\r\n", S_OR(d->version_id, "Unknown"));
            astman_append(s, "Ipaddress: %s\r\n", (d->session ? ast_inet_ntoa(d->session->sin.sin_addr) : "Unknown"));
            astman_append(s, "Port: %d\r\n", (d->session ? ntohs(d->session->sin.sin_port) : 0));
            astman_append(s, "DeviceType: %s\r\n", device2str(d->type));
            astman_append(s, "Codecs: ");
            ast_getformatname_multiple(codec_buf, sizeof(codec_buf) -1, d->confcap);
            astman_append(s, "%s\r\n", codec_buf);
            astman_append(s, "CodecOrder: ");
            ast_getformatname_multiple(codec_buf, sizeof(codec_buf) -1, d->cap);
            astman_append(s, "%s\r\n", codec_buf);
            astman_append(s, "Devicestatus: %s\r\n", (d->registered?"registered":"unregistered"));
            astman_append(s, "NumberOfLines: %d\r\n", numlines);
            AST_LIST_TRAVERSE(&d->lines, l, list) {
               astman_append(s, "Line: %s (%s)\r\n", l->name, l->label);
            }
            astman_append(s, "NumberOfAddons: %d\r\n", numaddons);
            AST_LIST_TRAVERSE(&d->addons, sa, list) {
               astman_append(s, "Addon: %s\r\n", sa->type);
            }
            astman_append(s, "NumberOfSpeeddials: %d\r\n", numspeeddials);
            AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
               astman_append(s, "Speeddial: %s (%s) ishint: %d\r\n", sd->exten, sd->label, sd->isHint);
            }
         }
      }
   }
   AST_LIST_UNLOCK(&devices);
   return CLI_SUCCESS;
}

static int manager_skinny_show_device(struct mansession *s, const struct message *m)
{
   const char *a[4];
   const char *device;

   device = astman_get_header(m, "Device");
   if (ast_strlen_zero(device)) {
      astman_send_error(s, m, "Device: <name> missing.");
      return 0;
   }
   a[0] = "skinny";
   a[1] = "show";
   a[2] = "device";
   a[3] = device;

   _skinny_show_device(1, -1, s, m, 4, a);
   astman_append(s, "\r\n\r\n" );
   return 0;
}

/*! \brief Show device information */
static char *handle_skinny_show_device(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch (cmd) {
   case CLI_INIT:
      e->command = "skinny show device";
      e->usage =
         "Usage: skinny show device <DeviceId|DeviceName>\n"
         "       Lists all deviceinformation of a specific device known to the Skinny subsystem.\n";
      return NULL;
   case CLI_GENERATE:
      return complete_skinny_show_device(a->line, a->word, a->pos, a->n);
   }

   return _skinny_show_device(0, a->fd, NULL, NULL, a->argc, (const char **) a->argv);
}

static char *_skinny_show_lines(int fd, int *total, struct mansession *s, const struct message *m, int argc, const char *argv[])
{
   struct skinny_line *l;
   struct skinny_subchannel *sub;
   int total_lines = 0;
   int verbose = 0;
   const char *id;
   char idtext[256] = "";

   if (s) { /* Manager - get ActionID */
      id = astman_get_header(m, "ActionID");
      if (!ast_strlen_zero(id))
         snprintf(idtext, sizeof(idtext), "ActionID: %s\r\n", id);
   }

   switch (argc) {
   case 4:
      verbose = 1;
      break;
   case 3:
      verbose = 0;
      break;
   default:
      return CLI_SHOWUSAGE;
   }

   if (!s) {
      ast_cli(fd, "Name                 Device Name          Instance Label               \n");
      ast_cli(fd, "-------------------- -------------------- -------- --------------------\n");
   }
   AST_LIST_LOCK(&lines);
   AST_LIST_TRAVERSE(&lines, l, all) {
      total_lines++;
      if (!s) {
         ast_cli(fd, "%-20s %-20s %8d %-20s\n",
            l->name,
            (l->device ? l->device->name : "Not connected"),
            l->instance,
            l->label);
         if (verbose) {
            AST_LIST_TRAVERSE(&l->sub, sub, list) {
               ast_cli(fd, "  %s> %s to %s\n",
                  (sub == l->activesub?"Active  ":"Inactive"),
                  ast_channel_name(sub->owner),
                  (ast_bridged_channel(sub->owner)?ast_channel_name(ast_bridged_channel(sub->owner)):"")
               );
            }
         }
      } else {
         astman_append(s,
            "Event: LineEntry\r\n%s"
            "Channeltype: SKINNY\r\n"
            "ObjectName: %s\r\n"
            "ChannelObjectType: line\r\n"
            "Device: %s\r\n"
            "Instance: %d\r\n"
            "Label: %s\r\n",
            idtext,
            l->name,
            (l->device?l->device->name:"None"),
            l->instance,
            l->label);
      }
   }
   AST_LIST_UNLOCK(&lines);

   if (total) {
      *total = total_lines;
   }

   return CLI_SUCCESS;
}

/*! \brief  Show Skinny lines in the manager API */
/*    Inspired from chan_sip */
static int manager_skinny_show_lines(struct mansession *s, const struct message *m)
{
   const char *id = astman_get_header(m, "ActionID");
   const char *a[] = {"skinny", "show", "lines"};
   char idtext[256] = "";
   int total = 0;

   if (!ast_strlen_zero(id))
      snprintf(idtext, sizeof(idtext), "ActionID: %s\r\n", id);

   astman_send_listack(s, m, "Line status list will follow", "start");
   /* List the lines in separate manager events */
   _skinny_show_lines(-1, &total, s, m, 3, a);
   /* Send final confirmation */
   astman_append(s,
   "Event: LinelistComplete\r\n"
   "EventList: Complete\r\n"
   "ListItems: %d\r\n"
   "%s"
   "\r\n", total, idtext);
   return 0;
}

static char *handle_skinny_show_lines(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch (cmd) {
   case CLI_INIT:
      e->command = "skinny show lines [verbose]";
      e->usage =
         "Usage: skinny show lines\n"
         "       Lists all lines known to the Skinny subsystem.\n"
         "       If 'verbose' is specified, the output includes\n"
         "       information about subs for each line.\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }

   if (a->argc == e->args) {
      if (strcasecmp(a->argv[e->args-1], "verbose")) {
         return CLI_SHOWUSAGE;
      }
   } else if (a->argc != e->args - 1) {
      return CLI_SHOWUSAGE;
   }

   return _skinny_show_lines(a->fd, NULL, NULL, NULL, a->argc, (const char **) a->argv);
}

static char *_skinny_show_line(int type, int fd, struct mansession *s, const struct message *m, int argc, const char *argv[])
{
   struct skinny_device *d;
   struct skinny_line *l;
   struct skinny_subline *subline;
   struct ast_codec_pref *pref;
   int x = 0;
   char codec_buf[512];
   char group_buf[256];
   char cbuf[256];

   switch (argc) {
   case 4:
      break;
   case 6:
      break;
   default:
      return CLI_SHOWUSAGE;
   }

   AST_LIST_LOCK(&devices);

   /* Show all lines matching the one supplied */
   AST_LIST_TRAVERSE(&devices, d, list) {
      if (argc == 6 && (strcasecmp(argv[5], d->id) && strcasecmp(argv[5], d->name))) {
         continue;
      }
      AST_LIST_TRAVERSE(&d->lines, l, list) {
         if (strcasecmp(argv[3], l->name)) {
            continue;
         }
         if (type == 0) { /* CLI */
            ast_cli(fd, "Line:             %s\n", l->name);
            ast_cli(fd, "On Device:        %s\n", d->name);
            ast_cli(fd, "Line Label:       %s\n", l->label);
            ast_cli(fd, "Extension:        %s\n", S_OR(l->exten, "<not set>"));
            ast_cli(fd, "Context:          %s\n", l->context);
            ast_cli(fd, "CallGroup:        %s\n", ast_print_group(group_buf, sizeof(group_buf), l->callgroup));
            ast_cli(fd, "PickupGroup:      %s\n", ast_print_group(group_buf, sizeof(group_buf), l->pickupgroup));
            ast_cli(fd, "Language:         %s\n", S_OR(l->language, "<not set>"));
            ast_cli(fd, "Accountcode:      %s\n", S_OR(l->accountcode, "<not set>"));
            ast_cli(fd, "AmaFlag:          %s\n", ast_cdr_flags2str(l->amaflags));
            ast_cli(fd, "CallerId Number:  %s\n", S_OR(l->cid_num, "<not set>"));
            ast_cli(fd, "CallerId Name:    %s\n", S_OR(l->cid_name, "<not set>"));
            ast_cli(fd, "Hide CallerId:    %s\n", (l->hidecallerid ? "Yes" : "No"));
            ast_cli(fd, "CFwdAll:          %s\n", S_COR((l->cfwdtype & SKINNY_CFWD_ALL), l->call_forward_all, "<not set>"));
            ast_cli(fd, "CFwdBusy:         %s\n", S_COR((l->cfwdtype & SKINNY_CFWD_BUSY), l->call_forward_busy, "<not set>"));
            ast_cli(fd, "CFwdNoAnswer:     %s\n", S_COR((l->cfwdtype & SKINNY_CFWD_NOANSWER), l->call_forward_noanswer, "<not set>"));
            ast_cli(fd, "VoicemailBox:     %s\n", S_OR(l->mailbox, "<not set>"));
            ast_cli(fd, "VoicemailNumber:  %s\n", S_OR(l->vmexten, "<not set>"));
            ast_cli(fd, "MWIblink:         %d\n", l->mwiblink);
            ast_cli(fd, "Regextension:     %s\n", S_OR(l->regexten, "<not set>"));
            ast_cli(fd, "Regcontext:       %s\n", S_OR(l->regcontext, "<not set>"));
            ast_cli(fd, "MoHInterpret:     %s\n", S_OR(l->mohinterpret, "<not set>"));
            ast_cli(fd, "MoHSuggest:       %s\n", S_OR(l->mohsuggest, "<not set>"));
            ast_cli(fd, "Last dialed nr:   %s\n", S_OR(l->lastnumberdialed, "<no calls made yet>"));
            ast_cli(fd, "Last CallerID:    %s\n", S_OR(l->lastcallerid, "<not set>"));
            ast_cli(fd, "Transfer enabled: %s\n", (l->transfer ? "Yes" : "No"));
            ast_cli(fd, "Callwaiting:      %s\n", (l->callwaiting ? "Yes" : "No"));
            ast_cli(fd, "3Way Calling:     %s\n", (l->threewaycalling ? "Yes" : "No"));
            ast_cli(fd, "Can forward:      %s\n", (l->cancallforward ? "Yes" : "No"));
            ast_cli(fd, "Do Not Disturb:   %s\n", (l->dnd ? "Yes" : "No"));
            ast_cli(fd, "NAT:              %s\n", (l->nat ? "Yes" : "No"));
            ast_cli(fd, "immediate:        %s\n", (l->immediate ? "Yes" : "No"));
            ast_cli(fd, "Group:            %d\n", l->group);
            ast_cli(fd, "Parkinglot:       %s\n", S_OR(l->parkinglot, "<not set>"));
            ast_cli(fd, "Conf Codecs:      ");
            ast_getformatname_multiple(codec_buf, sizeof(codec_buf) - 1, l->confcap);
            ast_cli(fd, "%s\n", codec_buf);
            ast_cli(fd, "Neg Codecs:       ");
            ast_getformatname_multiple(codec_buf, sizeof(codec_buf) - 1, l->cap);
            ast_cli(fd, "%s\n", codec_buf);
            ast_cli(fd, "Codec Order:      (");
            print_codec_to_cli(fd, &l->prefs);
            ast_cli(fd, ")\n");
            if  (AST_LIST_FIRST(&l->sublines)) {
               ast_cli(fd, "Sublines:\n");
               AST_LIST_TRAVERSE(&l->sublines, subline, list) {
                  ast_cli(fd, "     %s, %s@%s\n", subline->name, subline->exten, subline->context);
               }
            }
            ast_cli(fd, "\n");
         } else { /* manager */
            astman_append(s, "Channeltype: SKINNY\r\n");
            astman_append(s, "ObjectName: %s\r\n", l->name);
            astman_append(s, "ChannelObjectType: line\r\n");
            astman_append(s, "Device: %s\r\n", d->name);
            astman_append(s, "LineLabel: %s\r\n", l->label);
            astman_append(s, "Extension: %s\r\n", S_OR(l->exten, "<not set>"));
            astman_append(s, "Context: %s\r\n", l->context);
            astman_append(s, "CallGroup: %s\r\n", ast_print_group(group_buf, sizeof(group_buf), l->callgroup));
            astman_append(s, "PickupGroup: %s\r\n", ast_print_group(group_buf, sizeof(group_buf), l->pickupgroup));
            astman_append(s, "Language: %s\r\n", S_OR(l->language, "<not set>"));
            astman_append(s, "Accountcode: %s\r\n", S_OR(l->accountcode, "<not set>"));
            astman_append(s, "AMAflags: %s\r\n", ast_cdr_flags2str(l->amaflags));
            astman_append(s, "Callerid: %s\r\n", ast_callerid_merge(cbuf, sizeof(cbuf), l->cid_name, l->cid_num, ""));
            astman_append(s, "HideCallerId: %s\r\n", (l->hidecallerid ? "Yes" : "No"));
            astman_append(s, "CFwdAll: %s\r\n", S_COR((l->cfwdtype & SKINNY_CFWD_ALL), l->call_forward_all, "<not set>"));
            astman_append(s, "CFwdBusy: %s\r\n", S_COR((l->cfwdtype & SKINNY_CFWD_BUSY), l->call_forward_busy, "<not set>"));
            astman_append(s, "CFwdNoAnswer: %s\r\n", S_COR((l->cfwdtype & SKINNY_CFWD_NOANSWER), l->call_forward_noanswer, "<not set>"));
            astman_append(s, "VoicemailBox: %s\r\n", S_OR(l->mailbox, "<not set>"));
            astman_append(s, "VoicemailNumber: %s\r\n", S_OR(l->vmexten, "<not set>"));
            astman_append(s, "MWIblink: %d\r\n", l->mwiblink);
            astman_append(s, "RegExtension: %s\r\n", S_OR(l->regexten, "<not set>"));
            astman_append(s, "Regcontext: %s\r\n", S_OR(l->regcontext, "<not set>"));
            astman_append(s, "MoHInterpret: %s\r\n", S_OR(l->mohinterpret, "<not set>"));
            astman_append(s, "MoHSuggest: %s\r\n", S_OR(l->mohsuggest, "<not set>"));
            astman_append(s, "LastDialedNr: %s\r\n", S_OR(l->lastnumberdialed, "<no calls made yet>"));
            astman_append(s, "LastCallerID: %s\r\n", S_OR(l->lastcallerid, "<not set>"));
            astman_append(s, "Transfer: %s\r\n", (l->transfer ? "Yes" : "No"));
            astman_append(s, "Callwaiting: %s\r\n", (l->callwaiting ? "Yes" : "No"));
            astman_append(s, "3WayCalling: %s\r\n", (l->threewaycalling ? "Yes" : "No"));
            astman_append(s, "CanForward: %s\r\n", (l->cancallforward ? "Yes" : "No"));
            astman_append(s, "DoNotDisturb: %s\r\n", (l->dnd ? "Yes" : "No"));
            astman_append(s, "NAT: %s\r\n", (l->nat ? "Yes" : "No"));
            astman_append(s, "immediate: %s\r\n", (l->immediate ? "Yes" : "No"));
            astman_append(s, "Group: %d\r\n", l->group);
            astman_append(s, "Parkinglot: %s\r\n", S_OR(l->parkinglot, "<not set>"));
            ast_getformatname_multiple(codec_buf, sizeof(codec_buf) - 1, l->confcap);
            astman_append(s, "Codecs: %s\r\n", codec_buf);
            astman_append(s, "CodecOrder: ");
            pref = &l->prefs;
            for(x = 0; x < 32 ; x++) {
               struct ast_format tmpfmt;
               ast_codec_pref_index(pref, x, &tmpfmt);
               if (!tmpfmt.id)
                  break;
               astman_append(s, "%s", ast_getformatname(&tmpfmt));
               if (x < 31 && ast_codec_pref_index(pref, x+1, &tmpfmt))
                  astman_append(s, ",");
            }
            astman_append(s, "\r\n");
         }
      }
   }
   
   AST_LIST_UNLOCK(&devices);
   return CLI_SUCCESS;
}

static int manager_skinny_show_line(struct mansession *s, const struct message *m)
{
   const char *a[4];
   const char *line;

   line = astman_get_header(m, "Line");
   if (ast_strlen_zero(line)) {
      astman_send_error(s, m, "Line: <name> missing.");
      return 0;
   }
   a[0] = "skinny";
   a[1] = "show";
   a[2] = "line";
   a[3] = line;

   _skinny_show_line(1, -1, s, m, 4, a);
   astman_append(s, "\r\n\r\n" );
   return 0;
}

/*! \brief List line information. */
static char *handle_skinny_show_line(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch (cmd) {
   case CLI_INIT:
      e->command = "skinny show line";
      e->usage =
         "Usage: skinny show line <Line> [ on <DeviceID|DeviceName> ]\n"
         "       List all lineinformation of a specific line known to the Skinny subsystem.\n";
      return NULL;
   case CLI_GENERATE:
      return complete_skinny_show_line(a->line, a->word, a->pos, a->n);
   }

   return _skinny_show_line(0, a->fd, NULL, NULL, a->argc, (const char **) a->argv);
}

/*! \brief List global settings for the Skinny subsystem. */
static char *handle_skinny_show_settings(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch (cmd) {
   case CLI_INIT:
      e->command = "skinny show settings";
      e->usage =
         "Usage: skinny show settings\n"
         "       Lists all global configuration settings of the Skinny subsystem.\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }  

   if (a->argc != 3)
      return CLI_SHOWUSAGE;

   ast_cli(a->fd, "\nGlobal Settings:\n");
   ast_cli(a->fd, "  Skinny Port:            %d\n", ntohs(bindaddr.sin_port));
   ast_cli(a->fd, "  Bindaddress:            %s\n", ast_inet_ntoa(bindaddr.sin_addr));
   ast_cli(a->fd, "  KeepAlive:              %d\n", keep_alive);
   ast_cli(a->fd, "  Date Format:            %s\n", date_format);
   ast_cli(a->fd, "  Voice Mail Extension:   %s\n", S_OR(global_vmexten, "(not set)"));
   ast_cli(a->fd, "  Reg. context:           %s\n", S_OR(regcontext, "(not set)"));
   ast_cli(a->fd, "  Jitterbuffer enabled:   %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_ENABLED)));
    if (ast_test_flag(&global_jbconf, AST_JB_ENABLED)) {
      ast_cli(a->fd, "  Jitterbuffer forced:    %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_FORCED)));
      ast_cli(a->fd, "  Jitterbuffer max size:  %ld\n", global_jbconf.max_size);
      ast_cli(a->fd, "  Jitterbuffer resync:    %ld\n", global_jbconf.resync_threshold);
      ast_cli(a->fd, "  Jitterbuffer impl:      %s\n", global_jbconf.impl);
      if (!strcasecmp(global_jbconf.impl, "adaptive")) {
         ast_cli(a->fd, "  Jitterbuffer tgt extra: %ld\n", global_jbconf.target_extra);
      }
      ast_cli(a->fd, "  Jitterbuffer log:       %s\n", AST_CLI_YESNO(ast_test_flag(&global_jbconf, AST_JB_LOG)));
   }

   return CLI_SUCCESS;
}

static struct ast_cli_entry cli_skinny[] = {
   AST_CLI_DEFINE(handle_skinny_show_devices, "List defined Skinny devices"),
   AST_CLI_DEFINE(handle_skinny_show_device, "List Skinny device information"),
   AST_CLI_DEFINE(handle_skinny_show_lines, "List defined Skinny lines per device"),
   AST_CLI_DEFINE(handle_skinny_show_line, "List Skinny line information"),
   AST_CLI_DEFINE(handle_skinny_show_settings, "List global Skinny settings"),
   AST_CLI_DEFINE(handle_skinny_set_debug, "Enable/Disable Skinny debugging"),
   AST_CLI_DEFINE(handle_skinny_reset, "Reset Skinny device(s)"),
   AST_CLI_DEFINE(handle_skinny_reload, "Reload Skinny config"),
};

static void start_rtp(struct skinny_subchannel *sub)
{
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;
   int hasvideo = 0;
   struct ast_sockaddr bindaddr_tmp;

   ast_mutex_lock(&sub->lock);
   /* Allocate the RTP */
   ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
   sub->rtp = ast_rtp_instance_new("asterisk", sched, &bindaddr_tmp, NULL);
   if (hasvideo)
      sub->vrtp = ast_rtp_instance_new("asterisk", sched, &bindaddr_tmp, NULL);

   if (sub->rtp) {
      ast_rtp_instance_set_prop(sub->rtp, AST_RTP_PROPERTY_RTCP, 1);
   }
   if (sub->vrtp) {
      ast_rtp_instance_set_prop(sub->vrtp, AST_RTP_PROPERTY_RTCP, 1);
   }

   if (sub->rtp && sub->owner) {
      ast_channel_set_fd(sub->owner, 0, ast_rtp_instance_fd(sub->rtp, 0));
      ast_channel_set_fd(sub->owner, 1, ast_rtp_instance_fd(sub->rtp, 1));
   }
   if (hasvideo && sub->vrtp && sub->owner) {
      ast_channel_set_fd(sub->owner, 2, ast_rtp_instance_fd(sub->vrtp, 0));
      ast_channel_set_fd(sub->owner, 3, ast_rtp_instance_fd(sub->vrtp, 1));
   }
   if (sub->rtp) {
      ast_rtp_instance_set_qos(sub->rtp, qos.tos_audio, qos.cos_audio, "Skinny RTP");
      ast_rtp_instance_set_prop(sub->rtp, AST_RTP_PROPERTY_NAT, l->nat);
   }
   if (sub->vrtp) {
      ast_rtp_instance_set_qos(sub->vrtp, qos.tos_video, qos.cos_video, "Skinny VRTP");
      ast_rtp_instance_set_prop(sub->vrtp, AST_RTP_PROPERTY_NAT, l->nat);
   }
   /* Set Frame packetization */
   if (sub->rtp)
      ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp, &l->prefs);

   /* Create the RTP connection */
   transmit_connect(d, sub);
   ast_mutex_unlock(&sub->lock);
}

static void *skinny_newcall(void *data)
{
   struct ast_channel *c = data;
   struct skinny_subchannel *sub = c->tech_pvt;
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;
   int res = 0;

   ast_set_callerid(c,
      l->hidecallerid ? "" : l->cid_num,
      l->hidecallerid ? "" : l->cid_name,
      c->caller.ani.number.valid ? NULL : l->cid_num);
#if 1 /* XXX This code is probably not necessary */
   ast_party_number_free(&c->connected.id.number);
   ast_party_number_init(&c->connected.id.number);
   c->connected.id.number.valid = 1;
   c->connected.id.number.str = ast_strdup(c->exten);
   ast_party_name_free(&c->connected.id.name);
   ast_party_name_init(&c->connected.id.name);
#endif
   ast_setstate(c, AST_STATE_RING);
   if (!sub->rtp) {
      start_rtp(sub);
   }
   ast_verb(3, "Sub %d - Calling %s@%s\n", sub->callid, c->exten, c->context);
   res = ast_pbx_run(c);
   if (res) {
      ast_log(LOG_WARNING, "PBX exited non-zero\n");
      transmit_start_tone(d, SKINNY_REORDER, l->instance, sub->callid);
   }
   return NULL;
}

static void *skinny_ss(void *data)
{
   struct ast_channel *c = data;
   struct skinny_subchannel *sub = c->tech_pvt;
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;
   int len = 0;
   int timeout = firstdigittimeout;
   int res = 0;
   int loop_pause = 100;

   ast_verb(3, "Starting simple switch on '%s@%s'\n", l->name, d->name);

   len = strlen(sub->exten);

   while (len < AST_MAX_EXTENSION-1) {
      res = 1;  /* Assume that we will get a digit */
      while (strlen(sub->exten) == len){
         ast_safe_sleep(c, loop_pause);
         timeout -= loop_pause;
         if ( (timeout -= loop_pause) <= 0){
             res = 0;
             break;
         }
      res = 1;
      }
      
      if (sub != l->activesub) {
         break;
      }

      timeout = 0;
      len = strlen(sub->exten);

      if (!ast_ignore_pattern(c->context, sub->exten)) {
         transmit_stop_tone(d, l->instance, sub->callid);
      }
      if (ast_exists_extension(c, c->context, sub->exten, 1, l->cid_num)) {
         if (!res || !ast_matchmore_extension(c, c->context, sub->exten, 1, l->cid_num)) {
            if (l->getforward) {
               /* Record this as the forwarding extension */
               set_callforwards(l, sub->exten, l->getforward);
               ast_verb(3, "Setting call forward (%d) to '%s' on channel %s\n",
                     l->cfwdtype, sub->exten, ast_channel_name(c));
               transmit_start_tone(d, SKINNY_DIALTONE, l->instance, sub->callid);
               transmit_lamp_indication(d, STIMULUS_FORWARDALL, 1, SKINNY_LAMP_ON);
               transmit_displaynotify(d, "CFwd enabled", 10);
               transmit_cfwdstate(d, l);
               ast_safe_sleep(c, 500);
               ast_indicate(c, -1);
               ast_safe_sleep(c, 1000);
               len = 0;
               l->getforward = 0;
               if (sub->owner && sub->owner->_state != AST_STATE_UP) {
                  ast_indicate(c, -1);
                  ast_hangup(c);
               }
               return NULL;
            } else {
               if (sub->substate == SUBSTATE_OFFHOOK) {
                  dialandactivatesub(sub, sub->exten);
               }
               return NULL;
            }
         } else {
            /* It's a match, but they just typed a digit, and there is an ambiguous match,
               so just set the timeout to matchdigittimeout and wait some more */
            timeout = matchdigittimeout;
         }
      } else if (res == 0) {
         ast_debug(1, "Not enough digits (%s) (and no ambiguous match)...\n", sub->exten);
         if (d->hookstate == SKINNY_OFFHOOK) {
            transmit_start_tone(d, SKINNY_REORDER, l->instance, sub->callid);
         }
         if (sub->owner && sub->owner->_state != AST_STATE_UP) {
            ast_indicate(c, -1);
            ast_hangup(c);
         }
         return NULL;
      } else if (!ast_canmatch_extension(c, c->context, sub->exten, 1,
         S_COR(c->caller.id.number.valid, c->caller.id.number.str, NULL))
         && ((sub->exten[0] != '*') || (!ast_strlen_zero(sub->exten) > 2))) {
         ast_log(LOG_WARNING, "Can't match [%s] from '%s' in context %s\n", sub->exten,
            S_COR(c->caller.id.number.valid, c->caller.id.number.str, "<Unknown Caller>"),
            c->context);
         if (d->hookstate == SKINNY_OFFHOOK) {
            transmit_start_tone(d, SKINNY_REORDER, l->instance, sub->callid);
            /* hang out for 3 seconds to let congestion play */
            ast_safe_sleep(c, 3000);
         }
         break;
      }
      if (!timeout) {
         timeout = gendigittimeout;
      }
      if (len && !ast_ignore_pattern(c->context, sub->exten)) {
         ast_indicate(c, -1);
      }
   }
   if (c)
      ast_hangup(c);
   return NULL;
}

static int skinny_autoanswer_cb(const void *data)
{
   struct skinny_subchannel *sub = (struct skinny_subchannel *)data;
   sub->aa_sched = 0;
   setsubstate(sub, SKINNY_CONNECTED);
   return 0;
}

static int skinny_call(struct ast_channel *ast, const char *dest, int timeout)
{
   int res = 0;
   struct skinny_subchannel *sub = ast->tech_pvt;
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;
   struct ast_var_t *current;
   int doautoanswer = 0;

   if (!d->registered) {
      ast_log(LOG_ERROR, "Device not registered, cannot call %s\n", dest);
      return -1;
   }

   if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
      ast_log(LOG_WARNING, "skinny_call called on %s, neither down nor reserved\n", ast_channel_name(ast));
      return -1;
   }

   if (skinnydebug)
      ast_verb(3, "skinny_call(%s)\n", ast_channel_name(ast));

   if (l->dnd) {
      ast_queue_control(ast, AST_CONTROL_BUSY);
      return -1;
   }

   if (AST_LIST_NEXT(sub,list) && !l->callwaiting) {
      ast_queue_control(ast, AST_CONTROL_BUSY);
      return -1;
   }

   AST_LIST_TRAVERSE(&ast->varshead, current, entries) {
      if (!(strcasecmp(ast_var_name(current),"SKINNY_AUTOANSWER"))) {
         if (d->hookstate == SKINNY_ONHOOK && !sub->aa_sched) {
            char buf[24];
            int aatime;
            char *stringp = buf, *curstr;
            ast_copy_string(buf, ast_var_value(current), sizeof(buf));
            curstr = strsep(&stringp, ":");
            ast_verb(3, "test %s\n", curstr);
            aatime = atoi(curstr);
            while ((curstr = strsep(&stringp, ":"))) {
               if (!(strcasecmp(curstr,"BEEP"))) {
                  sub->aa_beep = 1;
               } else if (!(strcasecmp(curstr,"MUTE"))) {
                  sub->aa_mute = 1;
               }
            }
            if (skinnydebug)
               ast_verb(3, "Sub %d - setting autoanswer time=%dms %s%s\n", sub->callid, aatime, sub->aa_beep?"BEEP ":"", sub->aa_mute?"MUTE":"");
            if (aatime) {
               //sub->aa_sched = ast_sched_add(sched, aatime, skinny_autoanswer_cb, sub);
               sub->aa_sched = skinny_sched_add(aatime, skinny_autoanswer_cb, sub);
            } else {
               doautoanswer = 1;
            }
         }
      }
   }

   setsubstate(sub, SUBSTATE_RINGIN);
   if (doautoanswer) {
      setsubstate(sub, SUBSTATE_CONNECTED);
   }
   return res;
}

static int skinny_hangup(struct ast_channel *ast)
{
   struct skinny_subchannel *sub = ast->tech_pvt;

   if (!sub) {
      ast_debug(1, "Asked to hangup channel not connected\n");
      return 0;
   }
   
   dumpsub(sub, 1);

   if (skinnydebug)
      ast_verb(3,"Sub %d - Destroying\n", sub->callid);

   ast_mutex_lock(&sub->lock);
   sub->owner = NULL;
   ast->tech_pvt = NULL;
   if (sub->rtp) {
      ast_rtp_instance_destroy(sub->rtp);
      sub->rtp = NULL;
   }
   ast_mutex_unlock(&sub->lock);
   ast_free(sub);
   ast_module_unref(ast_module_info->self);
   return 0;
}

static int skinny_answer(struct ast_channel *ast)
{
   int res = 0;
   struct skinny_subchannel *sub = ast->tech_pvt;
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;

   if (sub->blindxfer) {
      if (skinnydebug)
         ast_debug(1, "skinny_answer(%s) on %s@%s-%d with BlindXFER, transferring\n",
            ast_channel_name(ast), l->name, d->name, sub->callid);
      ast_setstate(ast, AST_STATE_UP);
      skinny_transfer(sub);
      return 0;
   }

   sub->cxmode = SKINNY_CX_SENDRECV;

   if (skinnydebug)
      ast_verb(1, "skinny_answer(%s) on %s@%s-%d\n", ast_channel_name(ast), l->name, d->name, sub->callid);
   
   setsubstate(sub, SUBSTATE_CONNECTED);

   return res;
}

/* Retrieve audio/etc from channel.  Assumes sub->lock is already held. */
static struct ast_frame *skinny_rtp_read(struct skinny_subchannel *sub)
{
   struct ast_channel *ast = sub->owner;
   struct ast_frame *f;

   if (!sub->rtp) {
      /* We have no RTP allocated for this channel */
      return &ast_null_frame;
   }

   switch(ast->fdno) {
   case 0:
      f = ast_rtp_instance_read(sub->rtp, 0); /* RTP Audio */
      break;
   case 1:
      f = ast_rtp_instance_read(sub->rtp, 1); /* RTCP Control Channel */
      break;
   case 2:
      f = ast_rtp_instance_read(sub->vrtp, 0); /* RTP Video */
      break;
   case 3:
      f = ast_rtp_instance_read(sub->vrtp, 1); /* RTCP Control Channel for video */
      break;
#if 0
   case 5:
      /* Not yet supported */
      f = ast_udptl_read(sub->udptl); /* UDPTL for T.38 */
      break;
#endif
   default:
      f = &ast_null_frame;
   }

   if (ast) {
      /* We already hold the channel lock */
      if (f->frametype == AST_FRAME_VOICE) {
         if (!(ast_format_cap_iscompatible(ast->nativeformats, &f->subclass.format))) {
            ast_debug(1, "Oooh, format changed to %s\n", ast_getformatname(&f->subclass.format));
            ast_format_cap_set(ast->nativeformats, &f->subclass.format);
            ast_set_read_format(ast, &ast->readformat);
            ast_set_write_format(ast, &ast->writeformat);
         }
      }
   }
   return f;
}

static struct ast_frame *skinny_read(struct ast_channel *ast)
{
   struct ast_frame *fr;
   struct skinny_subchannel *sub = ast->tech_pvt;
   ast_mutex_lock(&sub->lock);
   fr = skinny_rtp_read(sub);
   ast_mutex_unlock(&sub->lock);
   return fr;
}

static int skinny_write(struct ast_channel *ast, struct ast_frame *frame)
{
   struct skinny_subchannel *sub = ast->tech_pvt;
   int res = 0;
   if (frame->frametype != AST_FRAME_VOICE) {
      if (frame->frametype == AST_FRAME_IMAGE) {
         return 0;
      } else {
         ast_log(LOG_WARNING, "Can't send %d type frames with skinny_write\n", frame->frametype);
         return 0;
      }
   } else {
      if (!(ast_format_cap_iscompatible(ast->nativeformats, &frame->subclass.format))) {
         char buf[256];
         ast_log(LOG_WARNING, "Asked to transmit frame type %s, while native formats is %s (read/write = %s/%s)\n",
            ast_getformatname(&frame->subclass.format),
            ast_getformatname_multiple(buf, sizeof(buf), ast->nativeformats),
            ast_getformatname(&ast->readformat),
            ast_getformatname(&ast->writeformat));
         return -1;
      }
   }
   if (sub) {
      ast_mutex_lock(&sub->lock);
      if (sub->rtp) {
         res = ast_rtp_instance_write(sub->rtp, frame);
      }
      ast_mutex_unlock(&sub->lock);
   }
   return res;
}

static int skinny_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
{
   struct skinny_subchannel *sub = newchan->tech_pvt;
   ast_log(LOG_NOTICE, "skinny_fixup(%s, %s)\n", ast_channel_name(oldchan), ast_channel_name(newchan));
   if (sub->owner != oldchan) {
      ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, sub->owner);
      return -1;
   }
   sub->owner = newchan;
   return 0;
}

static int skinny_senddigit_begin(struct ast_channel *ast, char digit)
{
   return -1; /* Start inband indications */
}

static int skinny_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration)
{
#if 0
   struct skinny_subchannel *sub = ast->tech_pvt;
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;
   int tmp;
   /* not right */
   sprintf(tmp, "%d", digit);
   //transmit_tone(d, digit, l->instance, sub->callid);
#endif
   return -1; /* Stop inband indications */
}

static int get_devicestate(struct skinny_line *l)
{
   struct skinny_subchannel *sub;
   int res = AST_DEVICE_UNKNOWN;

   if (!l)
      res = AST_DEVICE_INVALID;
   else if (!l->device)
      res = AST_DEVICE_UNAVAILABLE;
   else if (l->dnd)
      res = AST_DEVICE_BUSY;
   else {
      if (l->device->hookstate == SKINNY_ONHOOK) {
         res = AST_DEVICE_NOT_INUSE;
      } else {
         res = AST_DEVICE_INUSE;
      }

      AST_LIST_TRAVERSE(&l->sub, sub, list) {
         if (sub->substate == SUBSTATE_HOLD) {
            res = AST_DEVICE_ONHOLD;
            break;
         }
      }
   }

   return res;
}

static char *control2str(int ind) {
   char *tmp;

   switch (ind) {
   case AST_CONTROL_HANGUP:
      return "Other end has hungup";
   case AST_CONTROL_RING:
      return "Local ring";
   case AST_CONTROL_RINGING:
      return "Remote end is ringing";
   case AST_CONTROL_ANSWER:
      return "Remote end has answered";
   case AST_CONTROL_BUSY:
      return "Remote end is busy";
   case AST_CONTROL_TAKEOFFHOOK:
      return "Make it go off hook";
   case AST_CONTROL_OFFHOOK:
      return "Line is off hook";
   case AST_CONTROL_CONGESTION:
      return "Congestion (circuits busy)";
   case AST_CONTROL_FLASH:
      return "Flash hook";
   case AST_CONTROL_WINK:
      return "Wink";
   case AST_CONTROL_OPTION:
      return "Set a low-level option";
   case AST_CONTROL_RADIO_KEY:
      return "Key Radio";
   case AST_CONTROL_RADIO_UNKEY:
      return "Un-Key Radio";
   case AST_CONTROL_PROGRESS:
      return "Remote end is making Progress";
   case AST_CONTROL_PROCEEDING:
      return "Remote end is proceeding";
   case AST_CONTROL_HOLD:
      return "Hold";
   case AST_CONTROL_UNHOLD:
      return "Unhold";
   case AST_CONTROL_VIDUPDATE:
      return "VidUpdate";
   case AST_CONTROL_SRCUPDATE:
      return "Media Source Update";
   case AST_CONTROL_TRANSFER:
      return "Transfer";
   case AST_CONTROL_CONNECTED_LINE:
      return "Connected Line";
   case AST_CONTROL_REDIRECTING:
      return "Redirecting";
   case AST_CONTROL_T38_PARAMETERS:
      return "T38_Parameters";
   case AST_CONTROL_CC:
      return "CC Not Possible";
   case AST_CONTROL_SRCCHANGE:
      return "Media Source Change";
   case AST_CONTROL_INCOMPLETE:
      return "Incomplete";
   case -1:
      return "Stop tone";
   default:
      if (!(tmp = ast_threadstorage_get(&control2str_threadbuf, CONTROL2STR_BUFSIZE)))
                        return "Unknown";
      snprintf(tmp, CONTROL2STR_BUFSIZE, "UNKNOWN-%d", ind);
      return tmp;
   }
}

static int skinny_transfer(struct skinny_subchannel *sub)
{
   struct skinny_subchannel *xferor; /* the sub doing the transferring */
   struct skinny_subchannel *xferee; /* the sub being transferred */
   struct ast_tone_zone_sound *ts = NULL;

   if (ast_bridged_channel(sub->owner) || ast_bridged_channel(sub->related->owner)) {
      if (sub->xferor) {
         xferor = sub;
         xferee = sub->related;
      } else {
         xferor = sub;
         xferee = sub->related;
      }

      if (skinnydebug) {
         ast_debug(1, "Transferee channels (local/remote): %s and %s\n",
            ast_channel_name(xferee->owner), ast_bridged_channel(xferee->owner)?ast_channel_name(ast_bridged_channel(xferee->owner)):"");
         ast_debug(1, "Transferor channels (local/remote): %s and %s\n",
            ast_channel_name(xferor->owner), ast_bridged_channel(xferor->owner)?ast_channel_name(ast_bridged_channel(xferor->owner)):"");
      }
      if (ast_bridged_channel(xferor->owner)) {
         if (ast_bridged_channel(xferee->owner)) {
            ast_queue_control(xferee->owner, AST_CONTROL_UNHOLD);
         }
         if (xferor->owner->_state == AST_STATE_RING) {
            /* play ringing inband */
            if ((ts = ast_get_indication_tone(xferor->owner->zone, "ring"))) {
               ast_playtones_start(xferor->owner, 0, ts->data, 1);
               ts = ast_tone_zone_sound_unref(ts);
            }
         }
         if (skinnydebug)
            ast_debug(1, "Transfer Masquerading %s to %s\n",
               ast_channel_name(xferee->owner), ast_bridged_channel(xferor->owner)?ast_channel_name(ast_bridged_channel(xferor->owner)):"");
         if (ast_channel_masquerade(xferee->owner, ast_bridged_channel(xferor->owner))) {
            ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
               ast_channel_name(ast_bridged_channel(xferor->owner)), ast_channel_name(xferee->owner));
            return -1;
         }
      } else if (ast_bridged_channel(xferee->owner)) {
         ast_queue_control(xferee->owner, AST_CONTROL_UNHOLD);
         if (xferor->owner->_state == AST_STATE_RING) {
            /* play ringing inband */
            if ((ts = ast_get_indication_tone(xferor->owner->zone, "ring"))) {
               ast_playtones_start(xferor->owner, 0, ts->data, 1);
               ts = ast_tone_zone_sound_unref(ts);
            }
         }
         if (skinnydebug)
            ast_debug(1, "Transfer Masquerading %s to %s\n",
               ast_channel_name(xferor->owner), ast_bridged_channel(xferee->owner)?ast_channel_name(ast_bridged_channel(xferee->owner)):"");
         if (ast_channel_masquerade(xferor->owner, ast_bridged_channel(xferee->owner))) {
            ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
               ast_channel_name(ast_bridged_channel(xferee->owner)), ast_channel_name(xferor->owner));
            return -1;
         }
         return 0;
      } else {
         ast_debug(1, "Neither %s nor %s are in a bridge, nothing to transfer\n",
            ast_channel_name(xferor->owner), ast_channel_name(xferee->owner));
      }
   }
   return 0;
}

static int skinny_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen)
{
   struct skinny_subchannel *sub = ast->tech_pvt;
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;
   struct skinnysession *s = d->session;

   if (!s) {
      ast_log(LOG_NOTICE, "Asked to indicate '%s' condition on channel %s, but session does not exist.\n", control2str(ind), ast_channel_name(ast));
      return -1;
   }

   if (skinnydebug)
      ast_verb(3, "Asked to indicate '%s' condition on channel %s\n", control2str(ind), ast_channel_name(ast));
   switch(ind) {
   case AST_CONTROL_RINGING:
      if (sub->blindxfer) {
         if (skinnydebug)
            ast_debug(1, "Channel %s set up for Blind Xfer, so Xfer rather than ring device\n", ast_channel_name(ast));
         skinny_transfer(sub);
         break;
      }
      setsubstate(sub, SUBSTATE_RINGOUT);
      return (d->earlyrtp ? -1 : 0); /* Tell asterisk to provide inband signalling if rtp started */
   case AST_CONTROL_BUSY:
      setsubstate(sub, SUBSTATE_BUSY);
      return (d->earlyrtp ? -1 : 0); /* Tell asterisk to provide inband signalling if rtp started */
   case AST_CONTROL_INCOMPLETE:
      /* Support for incomplete not supported for chan_skinny; treat as congestion */
   case AST_CONTROL_CONGESTION:
      setsubstate(sub, SUBSTATE_CONGESTION);
      return (d->earlyrtp ? -1 : 0); /* Tell asterisk to provide inband signalling if rtp started */
   case AST_CONTROL_PROGRESS:
      setsubstate(sub, SUBSTATE_PROGRESS);
      return (d->earlyrtp ? -1 : 0); /* Tell asterisk to provide inband signalling if rtp started */
   case -1:  /* STOP_TONE */
      transmit_stop_tone(d, l->instance, sub->callid);
      break;
   case AST_CONTROL_HOLD:
      ast_moh_start(ast, data, l->mohinterpret);
      break;
   case AST_CONTROL_UNHOLD:
      ast_moh_stop(ast);
      break;
   case AST_CONTROL_PROCEEDING:
      break;
   case AST_CONTROL_SRCUPDATE:
      if (sub->rtp) {
         ast_rtp_instance_update_source(sub->rtp);
      }
      break;
   case AST_CONTROL_SRCCHANGE:
      if (sub->rtp) {
         ast_rtp_instance_change_source(sub->rtp);
      }
      break;
   case AST_CONTROL_CONNECTED_LINE:
      update_connectedline(sub, data, datalen);
      break;
   default:
      ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", ind);
      return -1; /* Tell asterisk to provide inband signalling */
   }
   return 0;
}

static struct ast_channel *skinny_new(struct skinny_line *l, struct skinny_subline *subline, int state, const char *linkedid, int direction)
{
   struct ast_channel *tmp;
   struct skinny_subchannel *sub;
   struct skinny_device *d = l->device;
   struct ast_variable *v = NULL;
   struct ast_format tmpfmt;

   if (!l->device) {
      ast_log(LOG_WARNING, "Device for line %s is not registered.\n", l->name);
      return NULL;
   }

   tmp = ast_channel_alloc(1, state, l->cid_num, l->cid_name, l->accountcode, l->exten, l->context, linkedid, l->amaflags, "Skinny/%s@%s-%d", l->name, d->name, callnums);
   if (!tmp) {
      ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
      return NULL;
   } else {
      sub = ast_calloc(1, sizeof(*sub));
      if (!sub) {
         ast_log(LOG_WARNING, "Unable to allocate Skinny subchannel\n");
         return NULL;
      } else {
         ast_mutex_init(&sub->lock);

         sub->owner = tmp;
         sub->callid = callnums++;
         d->lastlineinstance = l->instance;
         d->lastcallreference = sub->callid;
         sub->cxmode = SKINNY_CX_INACTIVE;
         sub->nat = l->nat;
         sub->line = l;
         sub->blindxfer = 0;
         sub->xferor = 0;
         sub->related = NULL;
         sub->calldirection = direction;

         if (subline) {
            sub->subline = subline;
            subline->sub = sub;
         } else {
            sub->subline = NULL;
         }
         
         AST_LIST_INSERT_HEAD(&l->sub, sub, list);
         //l->activesub = sub;
      }
      tmp->tech = &skinny_tech;
      tmp->tech_pvt = sub;
      ast_format_cap_copy(tmp->nativeformats, l->cap);
      if (ast_format_cap_is_empty(tmp->nativeformats)) {
         // Should throw an error
         ast_format_cap_copy(tmp->nativeformats, default_cap);
      }
      ast_best_codec(tmp->nativeformats, &tmpfmt);
      if (skinnydebug) {
         char buf[256];
         ast_verb(1, "skinny_new: tmp->nativeformats=%s fmt=%s\n",
            ast_getformatname_multiple(buf, sizeof(buf), tmp->nativeformats),
            ast_getformatname(&tmpfmt));
      }
      if (sub->rtp) {
         ast_channel_set_fd(tmp, 0, ast_rtp_instance_fd(sub->rtp, 0));
      }
      if (state == AST_STATE_RING) {
         tmp->rings = 1;
      }
      ast_format_copy(&tmp->writeformat, &tmpfmt);
      ast_format_copy(&tmp->rawwriteformat, &tmpfmt);
      ast_format_copy(&tmp->readformat, &tmpfmt);
      ast_format_copy(&tmp->rawreadformat, &tmpfmt);

      if (!ast_strlen_zero(l->language))
         ast_channel_language_set(tmp, l->language);
      if (!ast_strlen_zero(l->accountcode))
         ast_channel_accountcode_set(tmp, l->accountcode);
      if (!ast_strlen_zero(l->parkinglot))
         ast_channel_parkinglot_set(tmp, l->parkinglot);
      if (l->amaflags)
         tmp->amaflags = l->amaflags;

      ast_module_ref(ast_module_info->self);
      tmp->callgroup = l->callgroup;
      tmp->pickupgroup = l->pickupgroup;

      /* XXX Need to figure out how to handle CFwdNoAnswer */
      if (l->cfwdtype & SKINNY_CFWD_ALL) {
         ast_channel_call_forward_set(tmp, l->call_forward_all);
      } else if (l->cfwdtype & SKINNY_CFWD_BUSY) {
         if (get_devicestate(l) != AST_DEVICE_NOT_INUSE) {
            ast_channel_call_forward_set(tmp, l->call_forward_busy);
         }
      }

      if (subline) {
         ast_copy_string(tmp->context, subline->context, sizeof(tmp->context));
      } else {
         ast_copy_string(tmp->context, l->context, sizeof(tmp->context));
      }
      ast_copy_string(tmp->exten, l->exten, sizeof(tmp->exten));

      /* Don't use ast_set_callerid() here because it will
       * generate a needless NewCallerID event */
      if (!ast_strlen_zero(l->cid_num)) {
         tmp->caller.ani.number.valid = 1;
         tmp->caller.ani.number.str = ast_strdup(l->cid_num);
      }

      tmp->priority = 1;
      tmp->adsicpe = AST_ADSI_UNAVAILABLE;

      if (sub->rtp)
         ast_jb_configure(tmp, &global_jbconf);

      /* Set channel variables for this call from configuration */
      for (v = l->chanvars ; v ; v = v->next)
         pbx_builtin_setvar_helper(tmp, v->name, v->value);

      if (state != AST_STATE_DOWN) {
         if (ast_pbx_start(tmp)) {
            ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ast_channel_name(tmp));
            ast_hangup(tmp);
            tmp = NULL;
         }
      }
   }
   return tmp;
}
static char *substate2str(int ind) {
   char *tmp;

   switch (ind) {
   case SUBSTATE_UNSET:
      return "SUBSTATE_UNSET";
   case SUBSTATE_OFFHOOK:
      return "SUBSTATE_OFFHOOK";
   case SUBSTATE_ONHOOK:
      return "SUBSTATE_ONHOOK";
   case SUBSTATE_RINGOUT:
      return "SUBSTATE_RINGOUT";
   case SUBSTATE_RINGIN:
      return "SUBSTATE_RINGIN";
   case SUBSTATE_CONNECTED:
      return "SUBSTATE_CONNECTED";
   case SUBSTATE_BUSY:
      return "SUBSTATE_BUSY";
   case SUBSTATE_CONGESTION:
      return "SUBSTATE_CONGESTION";
   case SUBSTATE_PROGRESS:
      return "SUBSTATE_PROGRESS";
   case SUBSTATE_HOLD:
      return "SUBSTATE_HOLD";
   case SUBSTATE_CALLWAIT:
      return "SUBSTATE_CALLWAIT";
   case SUBSTATE_DIALING:
      return "SUBSTATE_DIALING";
   default:
      if (!(tmp = ast_threadstorage_get(&substate2str_threadbuf, SUBSTATE2STR_BUFSIZE)))
                        return "Unknown";
      snprintf(tmp, SUBSTATE2STR_BUFSIZE, "UNKNOWN-%d", ind);
      return tmp;
   }
}

static void setsubstate(struct skinny_subchannel *sub, int state)
{
   struct skinny_line *l = sub->line;
   struct skinny_subline *subline = sub->subline;
   struct skinny_device *d = l->device;
   struct ast_channel *c = sub->owner;
   pthread_t t;
   int actualstate = state;

   if (sub->substate == SUBSTATE_ONHOOK) {
      return;
   }

   if (state != SUBSTATE_RINGIN && sub->aa_sched) {
      skinny_sched_del(sub->aa_sched);
      sub->aa_sched = 0;
      sub->aa_beep = 0;
      sub->aa_mute = 0;
   }
   
   if ((state == SUBSTATE_RINGIN) && ((d->hookstate == SKINNY_OFFHOOK) || (AST_LIST_NEXT(AST_LIST_FIRST(&l->sub), list)))) {
      actualstate = SUBSTATE_CALLWAIT;
   }

   if ((state == SUBSTATE_CONNECTED) && (!subline) && (AST_LIST_FIRST(&l->sublines))) {
      const char *slastation;
      struct skinny_subline *tmpsubline;
      slastation = pbx_builtin_getvar_helper(c, "SLASTATION");
      ast_verb(3, "Connecting %s to subline\n", slastation);
      if (slastation) {
         AST_LIST_TRAVERSE(&l->sublines, tmpsubline, list) {
            if (!strcasecmp(tmpsubline->stname, slastation)) {
               subline = tmpsubline;
               break;
            }
         }
         if (subline) {
            struct skinny_line *tmpline;
            subline->sub = sub;
            sub->subline = subline;
            subline->callid = sub->callid;
            send_callinfo(sub);
            AST_LIST_TRAVERSE(&lines, tmpline, all) {
               AST_LIST_TRAVERSE(&tmpline->sublines, tmpsubline, list) {
                  if (!(subline == tmpsubline)) {
                     if (!strcasecmp(subline->lnname, tmpsubline->lnname)) {
                        tmpsubline->callid = callnums++;
                        transmit_callstate(tmpsubline->line->device, tmpsubline->line->instance, tmpsubline->callid, SKINNY_OFFHOOK);
                        push_callinfo(tmpsubline, sub);
                        skinny_extensionstate_cb(NULL, NULL, tmpsubline->extenstate, tmpsubline->container);
                     }
                  }
               }
            }
         }
      }
   }

   if (subline) { /* Different handling for subs under a subline, indications come through hints */
      switch (actualstate) {
      case SUBSTATE_ONHOOK:
         AST_LIST_REMOVE(&l->sub, sub, list);
         if (sub->related) {
            sub->related->related = NULL;
         }

         if (sub == l->activesub) {
            l->activesub = NULL;
            transmit_closereceivechannel(d, sub);
            transmit_stopmediatransmission(d, sub);
         }
         
         if (subline->callid) {
            transmit_stop_tone(d, l->instance, sub->callid);
            transmit_callstate(d, l->instance, subline->callid, SKINNY_CALLREMOTEMULTILINE);
            transmit_selectsoftkeys(d, l->instance, subline->callid, KEYDEF_SLACONNECTEDNOTACTIVE);
            transmit_displaypromptstatus(d, "In Use", 0, l->instance, subline->callid);
         }
         
         sub->cxmode = SKINNY_CX_RECVONLY;   
         sub->substate = SUBSTATE_ONHOOK;
         if (sub->rtp) {
            ast_rtp_instance_destroy(sub->rtp);
            sub->rtp = NULL;
         }
         sub->substate = SUBSTATE_ONHOOK;
         if (sub->owner) {
            ast_queue_hangup(sub->owner);
         }
         return;
      case SUBSTATE_CONNECTED:
         transmit_activatecallplane(d, l);
         transmit_stop_tone(d, l->instance, sub->callid);
         transmit_selectsoftkeys(d, l->instance, subline->callid, KEYDEF_CONNECTED);
         transmit_callstate(d, l->instance, subline->callid, SKINNY_CONNECTED);
         if (!sub->rtp) {
            start_rtp(sub);
         }
         if (sub->substate == SUBSTATE_RINGIN || sub->substate == SUBSTATE_CALLWAIT) {
            ast_queue_control(sub->owner, AST_CONTROL_ANSWER);
         }
         if (sub->substate == SUBSTATE_DIALING || sub->substate == SUBSTATE_RINGOUT) {
            transmit_dialednumber(d, l->lastnumberdialed, l->instance, sub->callid);
         }
         if (sub->owner->_state != AST_STATE_UP) {
            ast_setstate(sub->owner, AST_STATE_UP);
         }
         sub->substate = SUBSTATE_CONNECTED;
         l->activesub = sub;
         return; 
      case SUBSTATE_HOLD:
         if (sub->substate != SUBSTATE_CONNECTED) {
            ast_log(LOG_WARNING, "Cannot set substate to SUBSTATE_HOLD from %s (on call-%d)\n", substate2str(sub->substate), sub->callid);
            return;
         }
         transmit_activatecallplane(d, l);
         transmit_closereceivechannel(d, sub);
         transmit_stopmediatransmission(d, sub);

         transmit_callstate(d, l->instance, subline->callid, SKINNY_CALLREMOTEMULTILINE);
         transmit_selectsoftkeys(d, l->instance, subline->callid, KEYDEF_SLACONNECTEDNOTACTIVE);
         transmit_displaypromptstatus(d, "In Use", 0, l->instance, subline->callid);
         
         sub->substate = SUBSTATE_HOLD;

         ast_queue_control_data(sub->owner, AST_CONTROL_HOLD,
            S_OR(l->mohsuggest, NULL),
            !ast_strlen_zero(l->mohsuggest) ? strlen(l->mohsuggest) + 1 : 0);

         return;
      default:
         ast_log(LOG_WARNING, "Substate handling under subline for state %d not implemented on Sub-%d\n", state, sub->callid);
      }
   }

   if ((d->hookstate == SKINNY_ONHOOK) && ((actualstate == SUBSTATE_OFFHOOK) || (actualstate == SUBSTATE_DIALING)
      || (actualstate == SUBSTATE_RINGOUT) || (actualstate == SUBSTATE_CONNECTED) || (actualstate == SUBSTATE_BUSY)
      || (actualstate == SUBSTATE_CONGESTION) || (actualstate == SUBSTATE_PROGRESS))) {
         d->hookstate = SKINNY_OFFHOOK;
         transmit_speaker_mode(d, SKINNY_SPEAKERON);
   }

   if (skinnydebug) {
      ast_verb(3, "Sub %d - change state from %s to %s\n", sub->callid, substate2str(sub->substate), substate2str(actualstate));
   }

   if (actualstate == sub->substate) {
      send_callinfo(sub);
      transmit_callstate(d, l->instance, sub->callid, SKINNY_HOLD);
      return;
   }

   switch (actualstate) {
   case SUBSTATE_OFFHOOK:
      ast_verb(1, "Call-id: %d\n", sub->callid);
      l->activesub = sub;
      transmit_callstate(d, l->instance, sub->callid, SKINNY_OFFHOOK);
      transmit_activatecallplane(d, l);
      transmit_clear_display_message(d, l->instance, sub->callid);
      transmit_start_tone(d, SKINNY_DIALTONE, l->instance, sub->callid);
      transmit_selectsoftkeys(d, l->instance, sub->callid, KEYDEF_OFFHOOK);
      transmit_displaypromptstatus(d, "Enter number", 0, l->instance, sub->callid);

      sub->substate = SUBSTATE_OFFHOOK;
   
      /* start the switch thread */
      if (ast_pthread_create(&t, NULL, skinny_ss, sub->owner)) {
         ast_log(LOG_WARNING, "Unable to create switch thread: %s\n", strerror(errno));
         ast_hangup(sub->owner);
      }
      break;
   case SUBSTATE_ONHOOK:
      AST_LIST_REMOVE(&l->sub, sub, list);
      if (sub->related) {
         sub->related->related = NULL;
      }

      if (sub == l->activesub) {
         l->activesub = NULL;
         transmit_closereceivechannel(d, sub);
         transmit_stopmediatransmission(d, sub);
         transmit_stop_tone(d, l->instance, sub->callid);
         transmit_callstate(d, l->instance, sub->callid, SKINNY_ONHOOK);
         transmit_clearpromptmessage(d, l->instance, sub->callid);
         transmit_ringer_mode(d, SKINNY_RING_OFF);
         transmit_definetimedate(d); 
         transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_OFF);
      } else {
         transmit_stop_tone(d, l->instance, sub->callid);
         transmit_callstate(d, l->instance, sub->callid, SKINNY_ONHOOK);
         transmit_clearpromptmessage(d, l->instance, sub->callid);
      }

      sub->cxmode = SKINNY_CX_RECVONLY;   
      sub->substate = SUBSTATE_ONHOOK;
      if (sub->rtp) {
         ast_rtp_instance_destroy(sub->rtp);
         sub->rtp = NULL;
      }
      if (sub->owner) {
         ast_queue_hangup(sub->owner);
      }
      break;
   case SUBSTATE_DIALING:
      if (ast_strlen_zero(sub->exten) || !ast_exists_extension(c, c->context, sub->exten, 1, l->cid_num)) {
         ast_log(LOG_WARNING, "Exten (%s)@(%s) does not exist, unable to set substate DIALING on sub %d\n", sub->exten, c->context, sub->callid);
         return;
      }

      if (d->hookstate == SKINNY_ONHOOK) {
         d->hookstate = SKINNY_OFFHOOK;
         transmit_speaker_mode(d, SKINNY_SPEAKERON);
         transmit_activatecallplane(d, l);
      }

      if (!sub->subline) {
         transmit_callstate(d, l->instance, sub->callid, SKINNY_OFFHOOK);
         transmit_stop_tone(d, l->instance, sub->callid);
         transmit_clear_display_message(d, l->instance, sub->callid);
         transmit_selectsoftkeys(d, l->instance, sub->callid, KEYDEF_RINGOUT);
         transmit_displaypromptstatus(d, "Dialing", 0, l->instance, sub->callid);
      }

      if  (AST_LIST_FIRST(&l->sublines)) {
         if (subline) {
            ast_copy_string(c->exten, subline->exten, sizeof(c->exten));
            ast_copy_string(c->context, "sla_stations", sizeof(c->context));
         } else {
            pbx_builtin_setvar_helper(c, "_DESTEXTEN", sub->exten);
            pbx_builtin_setvar_helper(c, "_DESTCONTEXT", c->context);
            ast_copy_string(c->exten, l->dialoutexten, sizeof(c->exten));
            ast_copy_string(c->context, l->dialoutcontext, sizeof(c->context));
            ast_copy_string(l->lastnumberdialed, sub->exten, sizeof(l->lastnumberdialed));
         }
      } else {
         ast_copy_string(c->exten, sub->exten, sizeof(c->exten));
         ast_copy_string(l->lastnumberdialed, sub->exten, sizeof(l->lastnumberdialed));
      }
      
      sub->substate = SUBSTATE_DIALING;
   
      if (ast_pthread_create(&t, NULL, skinny_newcall, c)) {
         ast_log(LOG_WARNING, "Unable to create new call thread: %s\n", strerror(errno));
         ast_hangup(c);
      }
      break;
   case SUBSTATE_RINGOUT:
      if (!(sub->substate == SUBSTATE_DIALING || sub->substate == SUBSTATE_PROGRESS)) {
         ast_log(LOG_WARNING, "Cannot set substate to SUBSTATE_RINGOUT from %s (on call-%d)\n", substate2str(sub->substate), sub->callid);
         return;
      }
   
      if (!d->earlyrtp) {
         transmit_start_tone(d, SKINNY_ALERT, l->instance, sub->callid);
      }
      transmit_callstate(d, l->instance, sub->callid, SKINNY_RINGOUT);
      transmit_dialednumber(d, l->lastnumberdialed, l->instance, sub->callid);
      transmit_displaypromptstatus(d, "Ring Out", 0, l->instance, sub->callid);
      send_callinfo(sub);
      sub->substate = SUBSTATE_RINGOUT;
      break;
   case SUBSTATE_RINGIN:
      transmit_callstate(d, l->instance, sub->callid, SKINNY_RINGIN);
      transmit_selectsoftkeys(d, l->instance, sub->callid, KEYDEF_RINGIN);
      transmit_displaypromptstatus(d, "Ring-In", 0, l->instance, sub->callid);
      send_callinfo(sub);
      transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_BLINK);
      transmit_ringer_mode(d, SKINNY_RING_INSIDE);
      transmit_activatecallplane(d, l);

      if (d->hookstate == SKINNY_ONHOOK) {
         l->activesub = sub;
      }
   
      if (sub->substate != SUBSTATE_RINGIN || sub->substate != SUBSTATE_CALLWAIT) {
         ast_setstate(c, AST_STATE_RINGING);
         ast_queue_control(c, AST_CONTROL_RINGING);
      }
      sub->substate = SUBSTATE_RINGIN;
      break;
   case SUBSTATE_CALLWAIT:
      transmit_callstate(d, l->instance, sub->callid, SKINNY_RINGIN);
      transmit_callstate(d, l->instance, sub->callid, SKINNY_CALLWAIT);
      transmit_selectsoftkeys(d, l->instance, sub->callid, KEYDEF_RINGIN);
      transmit_displaypromptstatus(d, "Callwaiting", 0, l->instance, sub->callid);
      send_callinfo(sub);
      transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_BLINK);
      transmit_start_tone(d, SKINNY_CALLWAITTONE, l->instance, sub->callid);
   
      ast_setstate(c, AST_STATE_RINGING);
      ast_queue_control(c, AST_CONTROL_RINGING);
      sub->substate = SUBSTATE_CALLWAIT;
      break;
   case SUBSTATE_CONNECTED:
      if (sub->substate == SUBSTATE_HOLD) {
         ast_queue_control(sub->owner, AST_CONTROL_UNHOLD);
         transmit_connect(d, sub);
      }
      transmit_ringer_mode(d, SKINNY_RING_OFF);
      transmit_activatecallplane(d, l);
      transmit_stop_tone(d, l->instance, sub->callid);
      send_callinfo(sub);
      transmit_callstate(d, l->instance, sub->callid, SKINNY_CONNECTED);
      transmit_displaypromptstatus(d, "Connected", 0, l->instance, sub->callid);
      transmit_selectsoftkeys(d, l->instance, sub->callid, KEYDEF_CONNECTED);
      if (!sub->rtp) {
         start_rtp(sub);
      }
      if (sub->aa_beep) {
         transmit_start_tone(d, SKINNY_ZIP, l->instance, sub->callid);
      }
      if (sub->aa_mute) {
         transmit_microphone_mode(d, SKINNY_MICOFF);
      }
      if (sub->substate == SUBSTATE_RINGIN || sub->substate == SUBSTATE_CALLWAIT) {
         ast_queue_control(sub->owner, AST_CONTROL_ANSWER);
      }
      if (sub->substate == SUBSTATE_DIALING || sub->substate == SUBSTATE_RINGOUT) {
         transmit_dialednumber(d, l->lastnumberdialed, l->instance, sub->callid);
      }
      if (sub->owner->_state != AST_STATE_UP) {
         ast_setstate(sub->owner, AST_STATE_UP);
      }
      sub->substate = SUBSTATE_CONNECTED;
      l->activesub = sub;
      break;
   case SUBSTATE_BUSY:
      if (!(sub->substate == SUBSTATE_DIALING || sub->substate == SUBSTATE_PROGRESS || sub->substate == SUBSTATE_RINGOUT)) {
         ast_log(LOG_WARNING, "Cannot set substate to SUBSTATE_BUSY from %s (on call-%d)\n", substate2str(sub->substate), sub->callid);
         return;
      }

      if (!d->earlyrtp) {
         transmit_start_tone(d, SKINNY_BUSYTONE, l->instance, sub->callid);
      }
      send_callinfo(sub);
      transmit_callstate(d, l->instance, sub->callid, SKINNY_BUSY);
      transmit_displaypromptstatus(d, "Busy", 0, l->instance, sub->callid);
      sub->substate = SUBSTATE_BUSY;
      break;
   case SUBSTATE_CONGESTION:
      if (!(sub->substate == SUBSTATE_DIALING || sub->substate == SUBSTATE_PROGRESS || sub->substate == SUBSTATE_RINGOUT)) {
         ast_log(LOG_WARNING, "Cannot set substate to SUBSTATE_CONGESTION from %s (on call-%d)\n", substate2str(sub->substate), sub->callid);
         return;
      }

      if (!d->earlyrtp) {
         transmit_start_tone(d, SKINNY_REORDER, l->instance, sub->callid);
      }
      send_callinfo(sub);
      transmit_callstate(d, l->instance, sub->callid, SKINNY_CONGESTION);
      transmit_displaypromptstatus(d, "Congestion", 0, l->instance, sub->callid);
      sub->substate = SUBSTATE_CONGESTION;
      break;
   case SUBSTATE_PROGRESS:
      if (sub->substate != SUBSTATE_DIALING) {
         ast_log(LOG_WARNING, "Cannot set substate to SUBSTATE_PROGRESS from %s (on call-%d)\n", substate2str(sub->substate), sub->callid);
         return;
      }

      if (!d->earlyrtp) {
         transmit_start_tone(d, SKINNY_ALERT, l->instance, sub->callid);
      }
      send_callinfo(sub);
      transmit_callstate(d, l->instance, sub->callid, SKINNY_PROGRESS);
      transmit_displaypromptstatus(d, "Call Progress", 0, l->instance, sub->callid);
      sub->substate = SUBSTATE_PROGRESS;
      break;
   case SUBSTATE_HOLD:
      if (sub->substate != SUBSTATE_CONNECTED) {
         ast_log(LOG_WARNING, "Cannot set substate to SUBSTATE_HOLD from %s (on call-%d)\n", substate2str(sub->substate), sub->callid);
         return;
      }
      ast_queue_control_data(sub->owner, AST_CONTROL_HOLD,
         S_OR(l->mohsuggest, NULL),
         !ast_strlen_zero(l->mohsuggest) ? strlen(l->mohsuggest) + 1 : 0);

      transmit_activatecallplane(d, l);
      transmit_closereceivechannel(d, sub);
      transmit_stopmediatransmission(d, sub);

      transmit_callstate(d, l->instance, sub->callid, SKINNY_HOLD);
      transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_WINK);
      transmit_selectsoftkeys(d, l->instance, sub->callid, KEYDEF_ONHOLD);
      sub->substate = SUBSTATE_HOLD;
      break;
   default:
      ast_log(LOG_WARNING, "Was asked to change to nonexistant substate %d on Sub-%d\n", state, sub->callid);
   }
}

static void dumpsub(struct skinny_subchannel *sub, int forcehangup)
{
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;
   struct skinny_subchannel *activatesub = NULL;
   struct skinny_subchannel *tsub;

   if (skinnydebug) {
      ast_verb(3, "Sub %d - Dumping\n", sub->callid);
   }
   
   if (!forcehangup && sub->substate == SUBSTATE_HOLD) {
      l->activesub = NULL;
      return;
   }
   
   if (sub == l->activesub) {
      d->hookstate = SKINNY_ONHOOK;
      transmit_speaker_mode(d, SKINNY_SPEAKEROFF); 
      if (sub->related) {
         activatesub = sub->related;
         setsubstate(sub, SUBSTATE_ONHOOK);
         l->activesub = activatesub;
         if (l->activesub->substate != SUBSTATE_HOLD) {
            ast_log(LOG_WARNING, "Sub-%d was related but not at SUBSTATE_HOLD\n", sub->callid);
            return;
         }
         setsubstate(l->activesub, SUBSTATE_HOLD);
      } else {
         setsubstate(sub, SUBSTATE_ONHOOK);
         AST_LIST_TRAVERSE(&l->sub, tsub, list) {
            if (tsub->substate == SUBSTATE_CALLWAIT) {
               activatesub = tsub;
            }
         }
         if (activatesub) {
            setsubstate(activatesub, SUBSTATE_RINGIN);
            return;
         }
         AST_LIST_TRAVERSE(&l->sub, tsub, list) {
            if (tsub->substate == SUBSTATE_HOLD) {
               activatesub = tsub;
            }
         }
         if (activatesub) {
            setsubstate(activatesub, SUBSTATE_HOLD);
            return;
         }
      }
   } else {
      setsubstate(sub, SUBSTATE_ONHOOK);
   }
}

static void activatesub(struct skinny_subchannel *sub, int state)
{
   struct skinny_line *l = sub->line;

   if (skinnydebug) {
      ast_verb(3, "Sub %d - Activating, and deactivating sub %d\n", sub->callid, l->activesub?l->activesub->callid:0);
   }
   
   ast_channel_lock(sub->owner);

   if (sub == l->activesub) {
      setsubstate(sub, state);
   } else {
      if (l->activesub) {
         if (l->activesub->substate == SUBSTATE_RINGIN) {
            setsubstate(l->activesub, SUBSTATE_CALLWAIT);
         } else if (l->activesub->substate != SUBSTATE_HOLD) {
            setsubstate(l->activesub, SUBSTATE_ONHOOK);
         }
      }
      l->activesub = sub;
      setsubstate(sub, state);
   }

   ast_channel_unlock(sub->owner);
}

static void dialandactivatesub(struct skinny_subchannel *sub, char exten[AST_MAX_EXTENSION])
{
   if (skinnydebug) {
      ast_verb(3, "Sub %d - Dial %s and Activate\n", sub->callid, exten);
   }
   ast_copy_string(sub->exten, exten, sizeof(sub->exten));
   activatesub(sub, SUBSTATE_DIALING);
}
   
static int handle_hold_button(struct skinny_subchannel *sub)
{
   if (!sub)
      return -1;
   if (sub->related) {
      setsubstate(sub, SUBSTATE_HOLD);
      activatesub(sub->related, SUBSTATE_CONNECTED);
   } else {
      if (sub->substate == SUBSTATE_HOLD) {
         activatesub(sub, SUBSTATE_CONNECTED);
      } else {
         setsubstate(sub, SUBSTATE_HOLD);
      }
   }
   return 1;
}

static int handle_transfer_button(struct skinny_subchannel *sub)
{
   struct skinny_line *l;
   struct skinny_device *d;
   struct skinny_subchannel *newsub;
   struct ast_channel *c;

   if (!sub) {
      ast_verbose("Transfer: No subchannel to transfer\n");
      return -1;
   }

   l = sub->line;
   d = l->device;

   if (!sub->related) {
      /* Another sub has not been created so this must be first XFER press */
      if (!(sub->substate == SUBSTATE_HOLD)) {
         setsubstate(sub, SUBSTATE_HOLD);
      }
      c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      if (c) {
         newsub = c->tech_pvt;
         /* point the sub and newsub at each other so we know they are related */
         newsub->related = sub;
         sub->related = newsub;
         newsub->xferor = 1;
         setsubstate(newsub, SUBSTATE_OFFHOOK);
      } else {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      }
   } else {
      /* We already have a related sub so we can either complete XFER or go into BLINDXFER (or cancel BLINDXFER */
      if (sub->blindxfer) {
         /* toggle blindxfer off */
         sub->blindxfer = 0;
         sub->related->blindxfer = 0;
         /* we really need some indications */
      } else {
         /* We were doing attended transfer */
         if (sub->owner->_state == AST_STATE_DOWN || sub->related->owner->_state == AST_STATE_DOWN) {
            /* one of the subs so we cant transfer yet, toggle blindxfer on */
            sub->blindxfer = 1;
            sub->related->blindxfer = 1;
         } else {
            /* big assumption we have two channels, lets transfer */
            skinny_transfer(sub);
         }
      }
   }
   return 0;
}

static int handle_callforward_button(struct skinny_subchannel *sub, int cfwdtype)
{
   struct skinny_line *l = sub->line;
   struct skinny_device *d = l->device;
   struct ast_channel *c = sub->owner;

   if (d->hookstate == SKINNY_ONHOOK) {
      d->hookstate = SKINNY_OFFHOOK;
      transmit_speaker_mode(d, SKINNY_SPEAKERON);
      transmit_callstate(d, l->instance, sub->callid, SKINNY_OFFHOOK);
      transmit_activatecallplane(d, l);
   }
   transmit_clear_display_message(d, l->instance, sub->callid);

   if (l->cfwdtype & cfwdtype) {
      set_callforwards(l, NULL, cfwdtype);
      ast_safe_sleep(c, 500);
      transmit_speaker_mode(d, SKINNY_SPEAKEROFF);
      transmit_closereceivechannel(d, sub);
      transmit_stopmediatransmission(d, sub);
      transmit_speaker_mode(d, SKINNY_SPEAKEROFF);
      transmit_clearpromptmessage(d, l->instance, sub->callid);
      transmit_callstate(d, l->instance, sub->callid, SKINNY_ONHOOK);
      transmit_selectsoftkeys(d, 0, 0, KEYDEF_ONHOOK);
      transmit_activatecallplane(d, l);
      transmit_displaynotify(d, "CFwd disabled", 10);
      if (sub->owner && sub->owner->_state != AST_STATE_UP) {
         ast_indicate(c, -1);
         ast_hangup(c);
      }
      transmit_cfwdstate(d, l);
   } else {
      l->getforward = cfwdtype;
      setsubstate(sub, SUBSTATE_OFFHOOK);
   }
   return 0;
}
static int handle_ip_port_message(struct skinny_req *req, struct skinnysession *s)
{
   /* no response necessary */
   return 1;
}

static int handle_keypad_button_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_subchannel *sub = NULL;
   struct skinny_line *l;
   struct skinny_device *d = s->device;
   struct ast_frame f = { 0, };
   char dgt;
   int digit;
   int lineInstance;
   int callReference;

   digit = letohl(req->data.keypad.button);
   lineInstance = letohl(req->data.keypad.lineInstance);
   callReference = letohl(req->data.keypad.callReference);

   if (digit == 14) {
      dgt = '*';
   } else if (digit == 15) {
      dgt = '#';
   } else if (digit >= 0 && digit <= 9) {
      dgt = '0' + digit;
   } else {
      /* digit=10-13 (A,B,C,D ?), or
       * digit is bad value
       *
       * probably should not end up here, but set
       * value for backward compatibility, and log
       * a warning.
       */
      dgt = '0' + digit;
      ast_log(LOG_WARNING, "Unsupported digit %d\n", digit);
   }

   f.subclass.integer = dgt;

   f.src = "skinny";

   if (lineInstance && callReference)
      sub = find_subchannel_by_instance_reference(d, lineInstance, callReference);
   else
      sub = d->activeline->activesub;
      //sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);

   if (!sub)
      return 0;

   l = sub->line;
   if (sub->owner) {
      if (sub->owner->_state == 0) {
         f.frametype = AST_FRAME_DTMF_BEGIN;
         ast_queue_frame(sub->owner, &f);
      }
      /* XXX MUST queue this frame to all lines in threeway call if threeway call is active */
      f.frametype = AST_FRAME_DTMF_END;
      ast_queue_frame(sub->owner, &f);
      /* XXX This seriously needs to be fixed */
      if (AST_LIST_NEXT(sub, list) && AST_LIST_NEXT(sub, list)->owner) {
         if (sub->owner->_state == 0) {
            f.frametype = AST_FRAME_DTMF_BEGIN;
            ast_queue_frame(AST_LIST_NEXT(sub, list)->owner, &f);
         }
         f.frametype = AST_FRAME_DTMF_END;
         ast_queue_frame(AST_LIST_NEXT(sub, list)->owner, &f);
      }
   } else {
      if (skinnydebug)
         ast_verb(1, "No owner: %s\n", l->name);
   }
   return 1;
}

static int handle_stimulus_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d = s->device;
   struct skinny_line *l;
   struct skinny_subchannel *sub;
   /*struct skinny_speeddial *sd;*/
   struct ast_channel *c;
   int event;
   int instance;
   int callreference;
   /*int res = 0;*/

   event = letohl(req->data.stimulus.stimulus);
   instance = letohl(req->data.stimulus.stimulusInstance);
   callreference = letohl(req->data.stimulus.callreference); 
   if (skinnydebug)
      ast_verb(1, "callreference in handle_stimulus_message is '%d'\n", callreference);

   /*  Note that this call should be using the passed in instance and callreference */
   sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);

   if (!sub) {
      l = find_line_by_instance(d, d->lastlineinstance);
      if (!l) {
         return 0;
      }
      sub = l->activesub;
   } else {
      l = sub->line;
   }

   switch(event) {
   case STIMULUS_REDIAL:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Redial(%d/%d)\n", instance, callreference);

      if (ast_strlen_zero(l->lastnumberdialed)) {
         ast_log(LOG_WARNING, "Attempted redial, but no previously dialed number found. Ignoring button.\n");
         break;
      }

      c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         l = sub->line;
         dialandactivatesub(sub, l->lastnumberdialed);
      }
      break;
   case STIMULUS_SPEEDDIAL:
       {
      struct skinny_speeddial *sd;

      if (skinnydebug)
         ast_verb(1, "Received Stimulus: SpeedDial(%d/%d)\n", instance, callreference);
      if (!(sd = find_speeddial_by_instance(d, instance, 0))) {
         return 0;
      }

      if (!sub || !sub->owner)
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      else
         c = sub->owner;

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         dialandactivatesub(sub, sd->exten);
      }
       }
      break;
   case STIMULUS_HOLD:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Hold(%d/%d)\n", instance, callreference);
      handle_hold_button(sub);
      break;
   case STIMULUS_TRANSFER:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Transfer(%d/%d)\n", instance, callreference);
      if (l->transfer)
         handle_transfer_button(sub);
      else
         transmit_displaynotify(d, "Transfer disabled", 10);
      break;
   case STIMULUS_CONFERENCE:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Conference(%d/%d)\n", instance, callreference);
      /* XXX determine the best way to pull off a conference.  Meetme? */
      break;
   case STIMULUS_VOICEMAIL:
      if (skinnydebug) {
         ast_verb(1, "Received Stimulus: Voicemail(%d/%d)\n", instance, callreference);
      }

      if (!sub || !sub->owner) {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      } else {
         c = sub->owner;
      }
      
      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
         break;
      }
      
      sub = c->tech_pvt;
      if (sub->substate == SUBSTATE_UNSET || sub->substate == SUBSTATE_OFFHOOK){
         dialandactivatesub(sub, l->vmexten);
      }
      break;
   case STIMULUS_CALLPARK:
      {
      int extout;
      char message[32];

      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Park Call(%d/%d)\n", instance, callreference);

      if ((sub && sub->owner) && (sub->owner->_state ==  AST_STATE_UP)){
         c = sub->owner;
         if (ast_bridged_channel(c)) {
            if (!ast_masq_park_call(ast_bridged_channel(c), c, 0, &extout)) {
               snprintf(message, sizeof(message), "Call Parked at: %d", extout);
               transmit_displaynotify(d, message, 10);
            } else {
               transmit_displaynotify(d, "Call Park failed", 10);
            }
         } else {
            transmit_displaynotify(d, "Call Park not available", 10);
         }
      } else {
         transmit_displaynotify(d, "Call Park not available", 10);
      }
      break;
      }
   case STIMULUS_DND:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: DND (%d/%d)\n", instance, callreference);

      /* Do not disturb */
      if (l->dnd != 0){
         ast_verb(3, "Disabling DND on %s@%s\n", l->name, d->name);
         l->dnd = 0;
         transmit_lamp_indication(d, STIMULUS_DND, 1, SKINNY_LAMP_ON);
         transmit_displaynotify(d, "DnD disabled", 10);
      } else {
         ast_verb(3, "Enabling DND on %s@%s\n", l->name, d->name);
         l->dnd = 1;
         transmit_lamp_indication(d, STIMULUS_DND, 1, SKINNY_LAMP_OFF);
         transmit_displaynotify(d, "DnD enabled", 10);
      }
      break;
   case STIMULUS_FORWARDALL:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Forward All(%d/%d)\n", instance, callreference);

      if (!sub || !sub->owner) {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      } else {
         c = sub->owner;
      }

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         handle_callforward_button(sub, SKINNY_CFWD_ALL);
      }
      break;
   case STIMULUS_FORWARDBUSY:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Forward Busy (%d/%d)\n", instance, callreference);

      if (!sub || !sub->owner) {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      } else {
         c = sub->owner;
      }

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         handle_callforward_button(sub, SKINNY_CFWD_BUSY);
      }
      break;
   case STIMULUS_FORWARDNOANSWER:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Forward No Answer (%d/%d)\n", instance, callreference);

#if 0 /* Not sure how to handle this yet */
      if (!sub || !sub->owner) {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      } else {
         c = sub->owner;
      }

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         handle_callforward_button(sub, SKINNY_CFWD_NOANSWER);
      }
#endif
      break;
   case STIMULUS_DISPLAY:
      /* Not sure what this is */
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Display(%d/%d)\n", instance, callreference);
      break;
   case STIMULUS_LINE:
      if (skinnydebug)
         ast_verb(1, "Received Stimulus: Line(%d/%d)\n", instance, callreference);

      l = find_line_by_instance(d, instance);

      if (!l) {
         return 0;
      }

      d->activeline = l;

      /* turn the speaker on */
      transmit_speaker_mode(d, SKINNY_SPEAKERON);
      transmit_ringer_mode(d, SKINNY_RING_OFF);
      transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_ON);

      d->hookstate = SKINNY_OFFHOOK;

      if (sub && sub->calldirection == SKINNY_INCOMING) {
         setsubstate(sub, SUBSTATE_CONNECTED);
      } else {
         if (sub && sub->owner) {
            ast_debug(1, "Current subchannel [%s] already has owner\n", ast_channel_name(sub->owner));
         } else {
            c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
            if (c) {
               setsubstate(c->tech_pvt, SUBSTATE_OFFHOOK);
            } else {
               ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
            }
         }
      }
      break;
   default:
      if (skinnydebug)
         ast_verb(1, "RECEIVED UNKNOWN STIMULUS:  %d(%d/%d)\n", event, instance, callreference);
      break;
   }
   ast_devstate_changed(AST_DEVICE_UNKNOWN, "Skinny/%s", l->name);

   return 1;
}

static int handle_offhook_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d = s->device;
   struct skinny_line *l = NULL;
   struct skinny_subchannel *sub = NULL;
   struct ast_channel *c;
   int instance;
   int reference;

   instance = letohl(req->data.offhook.instance);
   reference = letohl(req->data.offhook.reference);

   SKINNY_DEVONLY(if (skinnydebug > 1) {
      ast_verb(4, "Received OFFHOOK_MESSAGE from %s, instance=%d, callid=%d\n", d->name, instance, reference);
   })

   if (d->hookstate == SKINNY_OFFHOOK) {
      ast_verb(3, "Got offhook message when device (%s) already offhook\n", d->name);
      return 0;
   }

   if (reference) {
      sub = find_subchannel_by_instance_reference(d, instance, reference);
      if (sub) {
         l = sub->line;
      }
   }
   if (!sub) {
      if (instance) {
         l = find_line_by_instance(d, instance);
      } else {
         l = d->activeline;
      }
      sub = l->activesub;
   }

   transmit_ringer_mode(d, SKINNY_RING_OFF);
   d->hookstate = SKINNY_OFFHOOK;

   ast_devstate_changed(AST_DEVICE_INUSE, "Skinny/%s", l->name);

   if (sub && sub->substate == SUBSTATE_HOLD) {
      return 1;
   }

   transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_ON);

   if (sub && sub->calldirection == SKINNY_INCOMING) {
      setsubstate(sub, SUBSTATE_CONNECTED);
   } else {
      /* Not ideal, but let's send updated time at onhook and offhook, as it clears the display */
      transmit_definetimedate(d);

      if (sub && sub->owner) {
         ast_debug(1, "Current sub [%s] already has owner\n", ast_channel_name(sub->owner));
      } else {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
         if (c) {
            setsubstate(c->tech_pvt, SUBSTATE_OFFHOOK);
         } else {
            ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
         }
      }
   }
   return 1;
}

static int handle_onhook_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d = s->device;
   struct skinny_line *l;
   struct skinny_subchannel *sub;
   int instance;
   int reference;

   instance = letohl(req->data.onhook.instance);
   reference = letohl(req->data.onhook.reference);

   if (instance && reference) {
      sub = find_subchannel_by_instance_reference(d, instance, reference);
      if (!sub) {
         return 0;
      }
      l = sub->line;
   } else {
      l = d->activeline;
      sub = l->activesub;
      if (!sub) {
         return 0;
      }
   }

   if (d->hookstate == SKINNY_ONHOOK) {
      /* Something else already put us back on hook */
      /* Not ideal, but let's send updated time anyway, as it clears the display */
      transmit_definetimedate(d);
      return 0;
   }

   if (l->transfer && sub->xferor && sub->owner->_state >= AST_STATE_RING) {
      /* We're allowed to transfer, we have two active calls and
         we made at least one of the calls.  Let's try and transfer */
      handle_transfer_button(sub);
      return 0;
   }
   
   ast_devstate_changed(AST_DEVICE_NOT_INUSE, "Skinny/%s", l->name);
   
   dumpsub(sub, 0);

   d->hookstate = SKINNY_ONHOOK;
   
   /* Not ideal, but let's send updated time at onhook and offhook, as it clears the display */
   transmit_definetimedate(d);

   return 1;
}

static int handle_capabilities_res_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d = s->device;
   struct skinny_line *l;
   uint32_t count = 0;
   struct ast_format_cap *codecs = ast_format_cap_alloc();
   int i;
   char buf[256];

   if (!codecs) {
      return 0;
   }

   count = letohl(req->data.caps.count);
   if (count > SKINNY_MAX_CAPABILITIES) {
      count = SKINNY_MAX_CAPABILITIES;
      ast_log(LOG_WARNING, "Received more capabilities than we can handle (%d).  Ignoring the rest.\n", SKINNY_MAX_CAPABILITIES);
   }

   for (i = 0; i < count; i++) {
      struct ast_format acodec;
      int scodec = 0;
      scodec = letohl(req->data.caps.caps[i].codec);
      codec_skinny2ast(scodec, &acodec);
      if (skinnydebug)
         ast_verb(1, "Adding codec capability %s (%d)'\n", ast_getformatname(&acodec), scodec);
      ast_format_cap_add(codecs, &acodec);
   }

   ast_format_cap_joint_copy(d->confcap, codecs, d->cap);
   ast_verb(0, "Device capability set to '%s'\n", ast_getformatname_multiple(buf, sizeof(buf), d->cap));
   AST_LIST_TRAVERSE(&d->lines, l, list) {
      ast_mutex_lock(&l->lock);
      ast_format_cap_joint_copy(l->confcap, d->cap, l->cap);
      ast_mutex_unlock(&l->lock);
   }

   codecs = ast_format_cap_destroy(codecs);
   return 1;
}

static int handle_button_template_req_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d = s->device;
   struct skinny_line *l;
   int i;

   struct skinny_speeddial *sd;
   struct button_definition_template btn[42];
   int lineInstance = 1;
   int speeddialInstance = 1;
   int buttonCount = 0;

   if (!(req = req_alloc(sizeof(struct button_template_res_message), BUTTON_TEMPLATE_RES_MESSAGE)))
      return -1;

   memset(&btn, 0, sizeof(btn));

   get_button_template(s, btn);

   for (i=0; i<42; i++) {
      int btnSet = 0;
      switch (btn[i].buttonDefinition) {
         case BT_CUST_LINE:
            /* assume failure */
            req->data.buttontemplate.definition[i].buttonDefinition = BT_NONE;
            req->data.buttontemplate.definition[i].instanceNumber = 0;

            AST_LIST_TRAVERSE(&d->lines, l, list) {
               if (l->instance == lineInstance) {
                  ast_verb(0, "Adding button: %d, %d\n", BT_LINE, lineInstance);
                  req->data.buttontemplate.definition[i].buttonDefinition = BT_LINE;
                  req->data.buttontemplate.definition[i].instanceNumber = lineInstance;
                  lineInstance++;
                  buttonCount++;
                  btnSet = 1;
                  break;
               }
            }

            if (!btnSet) {
               AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
                  if (sd->isHint && sd->instance == lineInstance) {
                     ast_verb(0, "Adding button: %d, %d\n", BT_LINE, lineInstance);
                     req->data.buttontemplate.definition[i].buttonDefinition = BT_LINE;
                     req->data.buttontemplate.definition[i].instanceNumber = lineInstance;
                     lineInstance++;
                     buttonCount++;
                     btnSet = 1;
                     break;
                  }
               }
            }
            break;
         case BT_CUST_LINESPEEDDIAL:
            /* assume failure */
            req->data.buttontemplate.definition[i].buttonDefinition = BT_NONE;
            req->data.buttontemplate.definition[i].instanceNumber = 0;

            AST_LIST_TRAVERSE(&d->lines, l, list) {
               if (l->instance == lineInstance) {
                  ast_verb(0, "Adding button: %d, %d\n", BT_LINE, lineInstance);
                  req->data.buttontemplate.definition[i].buttonDefinition = BT_LINE;
                  req->data.buttontemplate.definition[i].instanceNumber = lineInstance;
                  lineInstance++;
                  buttonCount++;
                  btnSet = 1;
                  break;
               }
            }

            if (!btnSet) {
               AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
                  if (sd->isHint && sd->instance == lineInstance) {
                     ast_verb(0, "Adding button: %d, %d\n", BT_LINE, lineInstance);
                     req->data.buttontemplate.definition[i].buttonDefinition = BT_LINE;
                     req->data.buttontemplate.definition[i].instanceNumber = lineInstance;
                     lineInstance++;
                     buttonCount++;
                     btnSet = 1;
                     break;
                  } else if (!sd->isHint && sd->instance == speeddialInstance) {
                     ast_verb(0, "Adding button: %d, %d\n", BT_SPEEDDIAL, speeddialInstance);
                     req->data.buttontemplate.definition[i].buttonDefinition = BT_SPEEDDIAL;
                     req->data.buttontemplate.definition[i].instanceNumber = speeddialInstance;
                     speeddialInstance++;
                     buttonCount++;
                     btnSet = 1;
                     break;
                  }
               }
            }
            break;
         case BT_LINE:
            req->data.buttontemplate.definition[i].buttonDefinition = htolel(BT_NONE);
            req->data.buttontemplate.definition[i].instanceNumber = htolel(0);

            AST_LIST_TRAVERSE(&d->lines, l, list) {
               if (l->instance == lineInstance) {
                  ast_verb(0, "Adding button: %d, %d\n", BT_LINE, lineInstance);
                  req->data.buttontemplate.definition[i].buttonDefinition = BT_LINE;
                  req->data.buttontemplate.definition[i].instanceNumber = lineInstance;
                  lineInstance++;
                  buttonCount++;
                  btnSet = 1;
                  break;
               }
            }
            break;
         case BT_SPEEDDIAL:
            req->data.buttontemplate.definition[i].buttonDefinition = BT_NONE;
            req->data.buttontemplate.definition[i].instanceNumber = 0;

            AST_LIST_TRAVERSE(&d->speeddials, sd, list) {
               if (!sd->isHint && sd->instance == speeddialInstance) {
                  ast_verb(0, "Adding button: %d, %d\n", BT_SPEEDDIAL, speeddialInstance);
                  req->data.buttontemplate.definition[i].buttonDefinition = BT_SPEEDDIAL;
                  req->data.buttontemplate.definition[i].instanceNumber = speeddialInstance - 1;
                  speeddialInstance++;
                  buttonCount++;
                  btnSet = 1;
                  break;
               }
            }
            break;
         case BT_NONE:
            break;
         default:
            ast_verb(0, "Adding button: %d, %d\n", btn[i].buttonDefinition, 0);
            req->data.buttontemplate.definition[i].buttonDefinition = htolel(btn[i].buttonDefinition);
            req->data.buttontemplate.definition[i].instanceNumber = 0;
            buttonCount++;
            btnSet = 1;
            break;
      }
   }

   req->data.buttontemplate.buttonOffset = 0;
   req->data.buttontemplate.buttonCount = htolel(buttonCount);
   req->data.buttontemplate.totalButtonCount = htolel(buttonCount);

   if (skinnydebug)
      ast_verb(1, "Sending %d template to %s\n",
               d->type,
               d->name);
   transmit_response(d, req);
   return 1;
}

static int handle_open_receive_channel_ack_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d = s->device;
   struct skinny_line *l;
   struct skinny_subchannel *sub;
   struct ast_format_list fmt;
   struct sockaddr_in sin = { 0, };
   struct sockaddr_in us = { 0, };
   struct ast_sockaddr sin_tmp;
   struct ast_sockaddr us_tmp;
   struct ast_format tmpfmt;
   uint32_t addr;
   int port;
   int status;
   int callid;

   status = (d->protocolversion<17)?letohl(req->data.openreceivechannelack_ip4.status):letohl(req->data.openreceivechannelack_ip6.status);
   if (status) {
      ast_log(LOG_ERROR, "Open Receive Channel Failure\n");
      return 0;
   }
   if (d->protocolversion<17) {
      addr = req->data.openreceivechannelack_ip4.ipAddr;
      port = letohl(req->data.openreceivechannelack_ip4.port);
      callid = letohl(req->data.openreceivechannelack_ip4.callReference);
   } else {
      memcpy(&addr, &req->data.openreceivechannelack_ip6.ipAddr, sizeof(addr));
      port = letohl(req->data.openreceivechannelack_ip6.port);
      callid = letohl(req->data.openreceivechannelack_ip6.callReference);
   }

   sin.sin_family = AF_INET;
   sin.sin_addr.s_addr = addr;
   sin.sin_port = htons(port);

   sub = find_subchannel_by_reference(d, callid);

   if (!sub) {
      ast_log(LOG_ERROR, "Open Receive Channel Failure - can't find sub for %d\n", callid);
      return 0;
   }

   l = sub->line;

   if (sub->rtp) {
      ast_sockaddr_from_sin(&sin_tmp, &sin);
      ast_rtp_instance_set_remote_address(sub->rtp, &sin_tmp);
      ast_rtp_instance_get_local_address(sub->rtp, &us_tmp);
      ast_sockaddr_to_sin(&us_tmp, &us);
      us.sin_addr.s_addr = us.sin_addr.s_addr ? us.sin_addr.s_addr : d->ourip.s_addr;
   } else {
      ast_log(LOG_ERROR, "No RTP structure, this is very bad\n");
      return 0;
   }

   if (skinnydebug) {
      ast_verb(1, "device ipaddr = %s:%d\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
      ast_verb(1, "asterisk ipaddr = %s:%d\n", ast_inet_ntoa(us.sin_addr), ntohs(us.sin_port));
   }
   ast_best_codec(l->cap, &tmpfmt);
   fmt = ast_codec_pref_getsize(&l->prefs, &tmpfmt);

   if (skinnydebug)
      ast_verb(1, "Setting payloadType to '%s' (%d ms)\n", ast_getformatname(&fmt.format), fmt.cur_ms);

   transmit_startmediatransmission(d, sub, us, fmt);

   return 1;
}

static int handle_enbloc_call_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d = s->device;
   struct skinny_line *l;
   struct skinny_subchannel *sub = NULL;
   struct ast_channel *c;

   if (skinnydebug)
      ast_verb(1, "Received Enbloc Call: %s\n", req->data.enbloccallmessage.calledParty);

   sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);

   if (!sub) {
      l = find_line_by_instance(d, d->lastlineinstance);
      if (!l) {
         return 0;
      }
   } else {
      l = sub->line;
   }

   c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);

   if(!c) {
      ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
   } else {
      d->hookstate = SKINNY_OFFHOOK;

      sub = c->tech_pvt;
      dialandactivatesub(sub, req->data.enbloccallmessage.calledParty);
   }
   
   return 1;
}


static int handle_soft_key_event_message(struct skinny_req *req, struct skinnysession *s)
{
   struct skinny_device *d = s->device;
   struct skinny_line *l;
   struct skinny_subchannel *sub = NULL;
   struct ast_channel *c;
   int event;
   int instance;
   int callreference;

   event = letohl(req->data.softkeyeventmessage.softKeyEvent);
   instance = letohl(req->data.softkeyeventmessage.instance);
   callreference = letohl(req->data.softkeyeventmessage.callreference);

   if (instance) {
      l = find_line_by_instance(d, instance);
      if (callreference) {
         sub = find_subchannel_by_instance_reference(d, instance, callreference);
      } else {
         sub = find_subchannel_by_instance_reference(d, instance, d->lastcallreference);
      }
   } else {
      l = find_line_by_instance(d, d->lastlineinstance);
   }

   if (!l) {
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: %d(%d/%d)\n", event, instance, callreference);
      return 0;
   }

   ast_devstate_changed(AST_DEVICE_INUSE, "Skinny/%s", l->name);

   switch(event) {
   case SOFTKEY_NONE:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: None(%d/%d)\n", instance, callreference);
      break;
   case SOFTKEY_REDIAL:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Redial(%d/%d)\n", instance, callreference);

      if (ast_strlen_zero(l->lastnumberdialed)) {
         ast_log(LOG_WARNING, "Attempted redial, but no previously dialed number found. Ignoring button.\n");
         break;
      }

      if (!sub || !sub->owner) {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      } else {
         c = sub->owner;
      }

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         dialandactivatesub(sub, l->lastnumberdialed);
      }
      break;
   case SOFTKEY_NEWCALL:  /* Actually the DIAL softkey */
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: New Call(%d/%d)\n", instance, callreference);

      /* New Call ALWAYS gets a new sub-channel */
      c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      sub = c->tech_pvt;

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         activatesub(sub, SUBSTATE_OFFHOOK);
      }
      break;
   case SOFTKEY_HOLD:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Hold(%d/%d)\n", instance, callreference);
      
      if (sub) {
         setsubstate(sub, SUBSTATE_HOLD); 
      } else { /* No sub, maybe an SLA call */
         struct skinny_subline *subline;
         if ((subline = find_subline_by_callid(d, callreference))) {
            setsubstate(subline->sub, SUBSTATE_HOLD); 
         }
      }

      break;
   case SOFTKEY_TRNSFER:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Transfer(%d/%d)\n", instance, callreference);
      if (l->transfer)
         handle_transfer_button(sub);
      else
         transmit_displaynotify(d, "Transfer disabled", 10);

      break;
   case SOFTKEY_DND:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: DND(%d/%d)\n", instance, callreference);

      /* Do not disturb */
      if (l->dnd != 0){
         ast_verb(3, "Disabling DND on %s@%s\n", l->name, d->name);
         l->dnd = 0;
         transmit_lamp_indication(d, STIMULUS_DND, 1, SKINNY_LAMP_ON);
         transmit_displaynotify(d, "DnD disabled", 10);
      } else {
         ast_verb(3, "Enabling DND on %s@%s\n", l->name, d->name);
         l->dnd = 1;
         transmit_lamp_indication(d, STIMULUS_DND, 1, SKINNY_LAMP_OFF);
         transmit_displaynotify(d, "DnD enabled", 10);
      }
      break;
   case SOFTKEY_CFWDALL:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Forward All(%d/%d)\n", instance, callreference);

      if (!sub || !sub->owner) {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      } else {
         c = sub->owner;
      }

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         l->activesub = sub;
         handle_callforward_button(sub, SKINNY_CFWD_ALL);
      }
      break;
   case SOFTKEY_CFWDBUSY:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Forward Busy (%d/%d)\n", instance, callreference);

      if (!sub || !sub->owner) {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      } else {
         c = sub->owner;
      }

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         l->activesub = sub;
         handle_callforward_button(sub, SKINNY_CFWD_BUSY);
      }
      break;
   case SOFTKEY_CFWDNOANSWER:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Forward No Answer (%d/%d)\n", instance, callreference);

#if 0 /* Not sure how to handle this yet */
      if (!sub || !sub->owner) {
         c = skinny_new(l, NULL, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
      } else {
         c = sub->owner;
      }

      if (!c) {
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
      } else {
         sub = c->tech_pvt;
         l->activesub = sub;
         handle_callforward_button(sub, SKINNY_CFWD_NOANSWER);
      }
#endif
      break;
   case SOFTKEY_BKSPC:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Backspace(%d/%d)\n", instance, callreference);
      break;
   case SOFTKEY_ENDCALL:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: End Call(%d/%d)\n", instance, callreference);

      if (l->transfer && sub && sub->xferor && sub->owner->_state >= AST_STATE_RING) {
         /* We're allowed to transfer, we have two active calls and
             we made at least one of the calls.  Let's try and transfer */
         handle_transfer_button(sub);
         return 0;
      }
   
      ast_devstate_changed(AST_DEVICE_NOT_INUSE, "Skinny/%s", l->name);
   
      if (sub) {
         dumpsub(sub, 1);
      } else { /* No sub, maybe an SLA call */
         struct skinny_subline *subline;
         if ((subline = find_subline_by_callid(d, callreference))) {
            dumpsub(subline->sub, 1);
         }
      }

      d->hookstate = SKINNY_ONHOOK;
   
      /* Not ideal, but let's send updated time at onhook and offhook, as it clears the display */
      transmit_definetimedate(d);

      break;
   case SOFTKEY_RESUME:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Resume(%d/%d)\n", instance, callreference);
      
      if (sub) {
         activatesub(sub, SUBSTATE_CONNECTED);
      } else { /* No sub, maybe an inactive SLA call */
         struct skinny_subline *subline;
         subline = find_subline_by_callid(d, callreference);
         c = skinny_new(l, subline, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
         if (!c) {
            ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
         } else {
            sub = c->tech_pvt;
            dialandactivatesub(sub, subline->exten);
         }
      }
      break;
   case SOFTKEY_ANSWER:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Answer(%d/%d)\n", instance, callreference);

      transmit_ringer_mode(d, SKINNY_RING_OFF);
      transmit_lamp_indication(d, STIMULUS_LINE, l->instance, SKINNY_LAMP_ON);
      if (d->hookstate == SKINNY_ONHOOK) {
         transmit_speaker_mode(d, SKINNY_SPEAKERON);
         d->hookstate = SKINNY_OFFHOOK;
      }

      if (sub && sub->calldirection == SKINNY_INCOMING) {
         activatesub(sub, SUBSTATE_CONNECTED);
      }
      break;
   case SOFTKEY_INFO:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Info(%d/%d)\n", instance, callreference);
      break;
   case SOFTKEY_CONFRN:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Conference(%d/%d)\n", instance, callreference);
      /* XXX determine the best way to pull off a conference.  Meetme? */
      break;
   case SOFTKEY_PARK:
      {
      int extout;
      char message[32];

      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Park Call(%d/%d)\n", instance, callreference);

      if ((sub && sub->owner) && (sub->owner->_state ==  AST_STATE_UP)){
         c = sub->owner;
         if (ast_bridged_channel(c)) {
            if (!ast_masq_park_call(ast_bridged_channel(c), c, 0, &extout)) {
               snprintf(message, sizeof(message), "Call Parked at: %d", extout);
               transmit_displaynotify(d, message, 10);
            } else {
               transmit_displaynotify(d, "Call Park failed", 10);
            }
         } else {
            transmit_displaynotify(d, "Call Park not available", 10);
         }
      } else {
         transmit_displaynotify(d, "Call Park not available", 10);
      }
      break;
      }
   case SOFTKEY_JOIN:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Join(%d/%d)\n", instance, callreference);
      /* this is SLA territory, should not get here unless there is a meetme at subline */
      {
         struct skinny_subline *subline;
         subline = find_subline_by_callid(d, callreference);
         c = skinny_new(l, subline, AST_STATE_DOWN, NULL, SKINNY_OUTGOING);
         if (!c) {
            ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
         } else {
            sub = c->tech_pvt;
            dialandactivatesub(sub, subline->exten);
         }
      }
      break;
   case SOFTKEY_MEETME:
      /* XXX How is this different from CONFRN? */
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Meetme(%d/%d)\n", instance, callreference);
      break;
   case SOFTKEY_PICKUP:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Pickup(%d/%d)\n", instance, callreference);
      break;
   case SOFTKEY_GPICKUP:
      if (skinnydebug)
         ast_verb(1, "Received Softkey Event: Group Pickup(%d/%d)\n", instance, callreference);
      break;
   default:
      if (skinnydebug)
         ast_verb(1, "Received unknown Softkey Event: %d(%d/%d)\n", event, instance, callreference);
      break;
   }

   return 1;
}

static int handle_message(struct skinny_req *req, struct skinnysession *s)
{
   int res = 0;
   struct skinny_speeddial *sd;
   struct skinny_device *d = s->device;
   
   if ((!s->device) && (letohl(req->e) != REGISTER_MESSAGE && letohl(req->e) != ALARM_MESSAGE)) {
      ast_log(LOG_WARNING, "Client sent message #%d without first registering.\n", req->e);
      ast_free(req);
      return 0;
   }

   SKINNY_DEVONLY(if (skinnydebug > 1) {
      ast_verb(4, "Received %s from %s\n", message2str(req->e), s->device->name);
   })

   switch(letohl(req->e)) {
   case KEEP_ALIVE_MESSAGE:
      transmit_keepaliveack(s->device);
      break;
   case REGISTER_MESSAGE:
      if (skinny_register(req, s)) {
         ast_atomic_fetchadd_int(&unauth_sessions, -1);
         ast_verb(3, "Device '%s' successfully registered (protoVers %d)\n", s->device->name, s->device->protocolversion);
         transmit_registerack(s->device);
         transmit_capabilitiesreq(s->device);
      } else {
         transmit_registerrej(s);
         ast_free(req);
         return -1;
      }
   case IP_PORT_MESSAGE:
      res = handle_ip_port_message(req, s);
      break;
   case KEYPAD_BUTTON_MESSAGE:
       {
      struct skinny_device *d = s->device;
      struct skinny_subchannel *sub;
      int lineInstance;
      int callReference;

      if (skinnydebug)
         ast_verb(1, "Collected digit: [%d]\n", letohl(req->data.keypad.button));

      lineInstance = letohl(req->data.keypad.lineInstance);
      callReference = letohl(req->data.keypad.callReference);

      if (lineInstance) {
         sub = find_subchannel_by_instance_reference(d, lineInstance, callReference);
      } else {
         sub = d->activeline->activesub;
      }

      if (sub && ((sub->owner && sub->owner->_state <  AST_STATE_UP) || sub->substate == SUBSTATE_HOLD)) {
         char dgt;
         int digit = letohl(req->data.keypad.button);

         if (digit == 14) {
            dgt = '*';
         } else if (digit == 15) {
            dgt = '#';
         } else if (digit >= 0 && digit <= 9) {
            dgt = '0' + digit;
         } else {
            /* digit=10-13 (A,B,C,D ?), or
            * digit is bad value
            *
            * probably should not end up here, but set
            * value for backward compatibility, and log
            * a warning.
            */
            dgt = '0' + digit;
            ast_log(LOG_WARNING, "Unsupported digit %d\n", digit);
         }

         sub->exten[strlen(sub->exten)] = dgt;
         sub->exten[strlen(sub->exten)+1] = '\0';
      } else
         res = handle_keypad_button_message(req, s);
      }
      break;
   case ENBLOC_CALL_MESSAGE:
      res = handle_enbloc_call_message(req, s);
      break;
   case STIMULUS_MESSAGE:
      res = handle_stimulus_message(req, s);
      break;
   case OFFHOOK_MESSAGE:
      res = handle_offhook_message(req, s);
      break;
   case ONHOOK_MESSAGE:
      res = handle_onhook_message(req, s);
      break;
   case CAPABILITIES_RES_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received CapabilitiesRes\n");

      res = handle_capabilities_res_message(req, s);
      break;
   case SPEED_DIAL_STAT_REQ_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received SpeedDialStatRequest\n");
      if ( (sd = find_speeddial_by_instance(s->device, letohl(req->data.speeddialreq.speedDialNumber), 0)) ) {
         transmit_speeddialstatres(d, sd);
      }
      break;
   case LINE_STATE_REQ_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received LineStatRequest\n");
      transmit_linestatres(d, letohl(req->data.line.lineNumber));
      break;
   case TIME_DATE_REQ_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received Time/Date Request\n");

      transmit_definetimedate(d);
      break;
   case BUTTON_TEMPLATE_REQ_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Buttontemplate requested\n");

      res = handle_button_template_req_message(req, s);
      break;
   case VERSION_REQ_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Version Request\n");
      transmit_versionres(d);
      break;
   case SERVER_REQUEST_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received Server Request\n");
      transmit_serverres(d);
      break;
   case ALARM_MESSAGE:
      /* no response necessary */
      if (skinnydebug)
         ast_verb(1, "Received Alarm Message: %s\n", req->data.alarm.displayMessage);
      break;
   case OPEN_RECEIVE_CHANNEL_ACK_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received Open Receive Channel Ack\n");

      res = handle_open_receive_channel_ack_message(req, s);
      break;
   case SOFT_KEY_SET_REQ_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received SoftKeySetReq\n");
      transmit_softkeysetres(d);
      transmit_selectsoftkeys(d, 0, 0, KEYDEF_ONHOOK);
      break;
   case SOFT_KEY_EVENT_MESSAGE:
      res = handle_soft_key_event_message(req, s);
      break;
   case UNREGISTER_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received Unregister Request\n");

      res = skinny_unregister(req, s);
      break;
   case SOFT_KEY_TEMPLATE_REQ_MESSAGE:
      if (skinnydebug)
         ast_verb(1, "Received SoftKey Template Request\n");
      transmit_softkeytemplateres(d);
      break;
   case HEADSET_STATUS_MESSAGE:
      /* XXX umm...okay?  Why do I care? */
      break;
   case REGISTER_AVAILABLE_LINES_MESSAGE:
      /* XXX I have no clue what this is for, but my phone was sending it, so... */
      break;
   default:
      if (skinnydebug)
         ast_verb(1, "RECEIVED UNKNOWN MESSAGE TYPE:  %x\n", letohl(req->e));
      break;
   }
   if (res >= 0 && req)
      ast_free(req);
   return res;
}

static void destroy_session(struct skinnysession *s)
{
   struct skinnysession *cur;
   AST_LIST_LOCK(&sessions);
   AST_LIST_TRAVERSE_SAFE_BEGIN(&sessions, cur, list) {
      if (cur == s) {
         AST_LIST_REMOVE_CURRENT(list);
         if (s->fd > -1) 
            close(s->fd);
         
         if (!s->device)
            ast_atomic_fetchadd_int(&unauth_sessions, -1);

         ast_mutex_destroy(&s->lock);
         
         ast_free(s);
      }
   }
   AST_LIST_TRAVERSE_SAFE_END
   AST_LIST_UNLOCK(&sessions);
}

static int get_input(struct skinnysession *s)
{
   int res;
   int dlen = 0;
   int timeout = keep_alive * 1100;
   time_t now;
   int *bufaddr;
   struct pollfd fds[1];

   if (!s->device) {
      if(time(&now) == -1) {
         ast_log(LOG_ERROR, "error executing time(): %s\n", strerror(errno));
         return -1;
      }

      timeout = (auth_timeout - (now - s->start)) * 1000;
      if (timeout < 0) {
         /* we have timed out */
         if (skinnydebug)
            ast_verb(1, "Skinny Client failed to authenticate in %d seconds\n", auth_timeout);
         return -1;
      }
   }

   fds[0].fd = s->fd;
   fds[0].events = POLLIN;
   fds[0].revents = 0;
   res = ast_poll(fds, 1, timeout); /* If nothing has happen, client is dead */
                   /* we add 10% to the keep_alive to deal */
                   /* with network delays, etc */
   if (res < 0) {
      if (errno != EINTR) {
         ast_log(LOG_WARNING, "Select returned error: %s\n", strerror(errno));
         return res;
      }
   } else if (res == 0) {
      if (skinnydebug) {
         if (s->device) {
            ast_verb(1, "Skinny Client was lost, unregistering\n");
         } else {
            ast_verb(1, "Skinny Client failed to authenticate in %d seconds\n", auth_timeout);
         }
      }
      skinny_unregister(NULL, s);
      return -1;
   }
           
   if (fds[0].revents) {
      ast_mutex_lock(&s->lock);
      memset(s->inbuf, 0, sizeof(s->inbuf));
      res = read(s->fd, s->inbuf, 4);
      if (res < 0) {
         ast_log(LOG_WARNING, "read() returned error: %s\n", strerror(errno));

         if (skinnydebug)
            ast_verb(1, "Skinny Client was lost, unregistering\n");

         skinny_unregister(NULL, s);
         ast_mutex_unlock(&s->lock);
         return res;
      } else if (res != 4) {
         ast_log(LOG_WARNING, "Skinny Client sent less data than expected.  Expected 4 but got %d.\n", res);
         ast_mutex_unlock(&s->lock);

         if (res == 0) {
            if (skinnydebug)
               ast_verb(1, "Skinny Client was lost, unregistering\n");
            skinny_unregister(NULL, s);
         }

         return -1;
      }

      bufaddr = (int *)s->inbuf;
      dlen = letohl(*bufaddr);
      if (dlen < 4) {
         ast_debug(1, "Skinny Client sent invalid data.\n");
         ast_mutex_unlock(&s->lock);
         return -1;
      }
      if (dlen+8 > sizeof(s->inbuf)) {
         ast_log(LOG_WARNING, "Skinny packet too large (%d bytes), max length(%d bytes)\n", dlen+8, SKINNY_MAX_PACKET);
         dlen = sizeof(s->inbuf) - 8;
      }
      *bufaddr = htolel(dlen);

      res = read(s->fd, s->inbuf+4, dlen+4);
      ast_mutex_unlock(&s->lock);
      if (res < 0) {
         ast_log(LOG_WARNING, "read() returned error: %s\n", strerror(errno));
         return res;
      } else if (res != (dlen+4)) {
         ast_log(LOG_WARNING, "Skinny Client sent less data than expected.\n");
         return -1;
      }
      return res;
   }
   return 0;
}

static struct skinny_req *skinny_req_parse(struct skinnysession *s)
{
   struct skinny_req *req;
   int *bufaddr;

   if (!(req = ast_calloc(1, SKINNY_MAX_PACKET)))
      return NULL;

   ast_mutex_lock(&s->lock);
   memcpy(req, s->inbuf, skinny_header_size);
   bufaddr = (int *)(s->inbuf);
   memcpy(&req->data, s->inbuf+skinny_header_size, letohl(*bufaddr)-4);

   ast_mutex_unlock(&s->lock);

   if (letohl(req->e) < 0) {
      ast_log(LOG_ERROR, "Event Message is NULL from socket %d, This is bad\n", s->fd);
      ast_free(req);
      return NULL;
   }

   return req;
}

static void *skinny_session(void *data)
{
   int res;
   struct skinny_req *req;
   struct skinnysession *s = data;

   ast_verb(3, "Starting Skinny session from %s\n", ast_inet_ntoa(s->sin.sin_addr));

   for (;;) {
      res = get_input(s);
      if (res < 0) {
         ast_verb(3, "Ending Skinny session from %s (bad input)\n", ast_inet_ntoa(s->sin.sin_addr));
         break;
      }

      if (res > 0)
      {
         if (!(req = skinny_req_parse(s))) {
            destroy_session(s);
            ast_verb(3, "Ending Skinny session from %s (failed parse)\n", ast_inet_ntoa(s->sin.sin_addr));
            return NULL;
         }

         res = handle_message(req, s);
         if (res < 0) {
            destroy_session(s);
            ast_verb(3, "Ending Skinny session from %s\n", ast_inet_ntoa(s->sin.sin_addr));
            return NULL;
         }
      }
   }
   ast_debug(3, "Skinny Session returned: %s\n", strerror(errno));

   if (s)
      destroy_session(s);

   return 0;
}

static void *accept_thread(void *ignore)
{
   int as;
   struct sockaddr_in sin;
   socklen_t sinlen;
   struct skinnysession *s;
   struct protoent *p;
   int arg = 1;

   for (;;) {
      sinlen = sizeof(sin);
      as = accept(skinnysock, (struct sockaddr *)&sin, &sinlen);
      if (as < 0) {
         ast_log(LOG_NOTICE, "Accept returned -1: %s\n", strerror(errno));
         continue;
      }

      if (ast_atomic_fetchadd_int(&unauth_sessions, +1) >= auth_limit) {
         close(as);
         ast_atomic_fetchadd_int(&unauth_sessions, -1);
         continue;
      }

      p = getprotobyname("tcp");
      if(p) {
         if( setsockopt(as, p->p_proto, TCP_NODELAY, (char *)&arg, sizeof(arg) ) < 0 ) {
            ast_log(LOG_WARNING, "Failed to set Skinny tcp connection to TCP_NODELAY mode: %s\n", strerror(errno));
         }
      }
      if (!(s = ast_calloc(1, sizeof(struct skinnysession)))) {
         close(as);
         ast_atomic_fetchadd_int(&unauth_sessions, -1);
         continue;
      }

      memcpy(&s->sin, &sin, sizeof(sin));
      ast_mutex_init(&s->lock);
      s->fd = as;

      if(time(&s->start) == -1) {
         ast_log(LOG_ERROR, "error executing time(): %s; disconnecting client\n", strerror(errno));
         destroy_session(s);
         continue;
      }

      AST_LIST_LOCK(&sessions);
      AST_LIST_INSERT_HEAD(&sessions, s, list);
      AST_LIST_UNLOCK(&sessions);

      if (ast_pthread_create(&s->t, NULL, skinny_session, s)) {
         destroy_session(s);
      }
   }
   if (skinnydebug)
      ast_verb(1, "killing accept thread\n");
   close(as);
   return 0;
}

static int skinny_devicestate(const char *data)
{
   struct skinny_line *l;
   char *tmp;

   tmp = ast_strdupa(data);

   l = find_line_by_name(tmp);

   return get_devicestate(l);
}

static struct ast_channel *skinny_request(const char *type, struct ast_format_cap *cap, const struct ast_channel *requestor, const char *dest, int *cause)
{
   struct skinny_line *l;
   struct skinny_subline *subline = NULL;
   struct ast_channel *tmpc = NULL;
   char tmp[256];

   if (!(ast_format_cap_has_type(cap, AST_FORMAT_TYPE_AUDIO))) {
      ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%s'\n", ast_getformatname_multiple(tmp, sizeof(tmp), cap));
      return NULL;
   }

   ast_copy_string(tmp, dest, sizeof(tmp));
   if (ast_strlen_zero(tmp)) {
      ast_log(LOG_NOTICE, "Skinny channels require a device\n");
      return NULL;
   }
   l = find_line_by_name(tmp);
   if (!l) {
      subline = find_subline_by_name(tmp);
      if (!subline) {
         ast_log(LOG_NOTICE, "No available lines on: %s\n", dest);
         return NULL;
      }
      l = subline->line;
   }
   ast_verb(3, "skinny_request(%s)\n", tmp);
   tmpc = skinny_new(l, subline, AST_STATE_DOWN, requestor ? ast_channel_linkedid(requestor) : NULL, SKINNY_INCOMING);
   if (!tmpc) {
      ast_log(LOG_WARNING, "Unable to make channel for '%s'\n", tmp);
   } else if (subline) {
      struct skinny_subchannel *sub = tmpc->tech_pvt;
      subline->sub = sub;
      subline->calldirection = SKINNY_INCOMING;
      subline->substate = SUBSTATE_UNSET;
      subline->callid = sub->callid;
      sub->subline = subline;
   }
   return tmpc;
}

 #define TYPE_GENERAL   1
 #define TYPE_DEF_DEVICE 2
 #define TYPE_DEF_LINE  4
 #define TYPE_DEVICE    8
 #define TYPE_LINE   16
 
 #define CLINE_OPTS  ((struct skinny_line_options *)item)
 #define CLINE    ((struct skinny_line *)item)
 #define CDEV_OPTS   ((struct skinny_device_options *)item)
 #define CDEV     ((struct skinny_device *)item)
 
 static void config_parse_variables(int type, void *item, struct ast_variable *vptr)
 {
   struct ast_variable *v;
   int lineInstance = 1;
   int speeddialInstance = 1;
   
   while(vptr) {
      v = vptr;
      vptr = vptr->next;
 
      if (type & (TYPE_GENERAL)) {
         char newcontexts[AST_MAX_CONTEXT];
         char oldcontexts[AST_MAX_CONTEXT];
         char *stringp, *context, *oldregcontext;
         if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) {
            v = v->next;
            continue;
         }
         if (!strcasecmp(v->name, "bindaddr")) {
            if (!(hp = ast_gethostbyname(v->value, &ahp))) {
               ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
            } else {
               memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
            }
            continue;
         } else if (!strcasecmp(v->name, "keepalive")) {
            keep_alive = atoi(v->value);
            continue;
         } else if (!strcasecmp(v->name, "authtimeout")) {
            int timeout = atoi(v->value);

            if (timeout < 1) {
               ast_log(LOG_WARNING, "Invalid authtimeout value '%s', using default value\n", v->value);
               auth_timeout = DEFAULT_AUTH_TIMEOUT;
            } else {
               auth_timeout = timeout;
            }
            continue;
         } else if (!strcasecmp(v->name, "authlimit")) {
            int limit = atoi(v->value);

            if (limit < 1) {
               ast_log(LOG_WARNING, "Invalid authlimit value '%s', using default value\n", v->value);
               auth_limit = DEFAULT_AUTH_LIMIT;
            } else {
               auth_limit = limit;
            }
            continue;
         } else if (!strcasecmp(v->name, "regcontext")) {
            ast_copy_string(newcontexts, v->value, sizeof(newcontexts));
            stringp = newcontexts;
            /* Initialize copy of current global_regcontext for later use in removing stale contexts */
            ast_copy_string(oldcontexts, regcontext, sizeof(oldcontexts));
            oldregcontext = oldcontexts;
            /* Let's remove any contexts that are no longer defined in regcontext */
            cleanup_stale_contexts(stringp, oldregcontext);
            /* Create contexts if they don't exist already */
            while ((context = strsep(&stringp, "&"))) {
               ast_copy_string(used_context, context, sizeof(used_context));
               ast_context_find_or_create(NULL, NULL, context, "Skinny");
            }
            ast_copy_string(regcontext, v->value, sizeof(regcontext));
            continue;
         } else if (!strcasecmp(v->name, "dateformat")) {
            memcpy(date_format, v->value, sizeof(date_format));
            continue;
         } else if (!strcasecmp(v->name, "tos")) {
            if (ast_str2tos(v->value, &qos.tos))
               ast_log(LOG_WARNING, "Invalid tos value at line %d, refer to QoS documentation\n", v->lineno);
            continue;
         } else if (!strcasecmp(v->name, "tos_audio")) {
            if (ast_str2tos(v->value, &qos.tos_audio))
               ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno);
            continue;
         } else if (!strcasecmp(v->name, "tos_video")) {
            if (ast_str2tos(v->value, &qos.tos_video))
               ast_log(LOG_WARNING, "Invalid tos_video value at line %d, refer to QoS documentation\n", v->lineno);
            continue;
         } else if (!strcasecmp(v->name, "cos")) {
            if (ast_str2cos(v->value, &qos.cos))
               ast_log(LOG_WARNING, "Invalid cos value at line %d, refer to QoS documentation\n", v->lineno);
            continue;
         } else if (!strcasecmp(v->name, "cos_audio")) {
            if (ast_str2cos(v->value, &qos.cos_audio))
               ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno);
            continue;
         } else if (!strcasecmp(v->name, "cos_video")) {
            if (ast_str2cos(v->value, &qos.cos_video))
               ast_log(LOG_WARNING, "Invalid cos_video value at line %d, refer to QoS documentation\n", v->lineno);
            continue;
         } else if (!strcasecmp(v->name, "bindport")) {
            if (sscanf(v->value, "%5d", &ourport) == 1) {
               bindaddr.sin_port = htons(ourport);
            } else {
               ast_log(LOG_WARNING, "Invalid bindport '%s' at line %d of %s\n", v->value, v->lineno, config);
            }
            continue;
         } else if (!strcasecmp(v->name, "allow")) {
            ast_parse_allow_disallow(&default_prefs, default_cap, v->value, 1);
            continue;
         } else if (!strcasecmp(v->name, "disallow")) {
            ast_parse_allow_disallow(&default_prefs, default_cap, v->value, 0);
            continue;
         } 
      }
 
      if (!strcasecmp(v->name, "transfer")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE)) {
            CDEV_OPTS->transfer = ast_true(v->value);
            continue;
         } else if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->transfer = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "callwaiting")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE)) {
            CDEV_OPTS->callwaiting = ast_true(v->value);
            continue;
         } else if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->callwaiting = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "directmedia") || !strcasecmp(v->name, "canreinvite")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->directmedia = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "nat")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->nat = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "context")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->context, v->value, sizeof(CLINE_OPTS->context));
            continue;
         }
      }else if (!strcasecmp(v->name, "vmexten")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE)) {
            ast_copy_string(CDEV_OPTS->vmexten, v->value, sizeof(CDEV_OPTS->vmexten));
            continue;
         } else if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->vmexten, v->value, sizeof(CLINE_OPTS->vmexten));
            continue;
         }
      } else if (!strcasecmp(v->name, "mwiblink")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE)) {
            CDEV_OPTS->mwiblink = ast_true(v->value);
            continue;
         } else if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->mwiblink = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "linelabel")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->label, v->value, sizeof(CLINE_OPTS->label));
            continue;
         }
      } else if (!strcasecmp(v->name, "callerid")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            if (!strcasecmp(v->value, "asreceived")) {
               CLINE_OPTS->cid_num[0] = '\0';
               CLINE_OPTS->cid_name[0] = '\0';
            } else {
               ast_callerid_split(v->value, CLINE_OPTS->cid_name, sizeof(CLINE_OPTS->cid_name), CLINE_OPTS->cid_num, sizeof(CLINE_OPTS->cid_num));
            }
            continue;
         }
      } else if (!strcasecmp(v->name, "amaflags")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            int tempamaflags = ast_cdr_amaflags2int(v->value);
            if (tempamaflags < 0) {
               ast_log(LOG_WARNING, "Invalid AMA flags: %s at line %d\n", v->value, v->lineno);
            } else {
               CLINE_OPTS->amaflags = tempamaflags;
            }
            continue;
         }
      } else if (!strcasecmp(v->name, "regexten")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->regexten, v->value, sizeof(CLINE_OPTS->regexten));
            continue;
         }
      } else if (!strcasecmp(v->name, "language")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->language, v->value, sizeof(CLINE_OPTS->language));
            continue;
         }
      } else if (!strcasecmp(v->name, "accountcode")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->accountcode, v->value, sizeof(CLINE_OPTS->accountcode));
            continue;
         }
      } else if (!strcasecmp(v->name, "mohinterpret") || !strcasecmp(v->name, "musiconhold")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->mohinterpret, v->value, sizeof(CLINE_OPTS->mohinterpret));
            continue;
         }
      } else if (!strcasecmp(v->name, "mohsuggest")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->mohsuggest, v->value, sizeof(CLINE_OPTS->mohsuggest));
            continue;
         }
      } else if (!strcasecmp(v->name, "callgroup")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->callgroup = ast_get_group(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "pickupgroup")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->pickupgroup = ast_get_group(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "immediate")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE | TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->immediate = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "cancallforward")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->cancallforward = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "mailbox")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->mailbox, v->value, sizeof(CLINE_OPTS->mailbox));
            continue;
         }
      } else if ( !strcasecmp(v->name, "parkinglot")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->parkinglot, v->value, sizeof(CLINE_OPTS->parkinglot));
            continue;
         }
      } else if (!strcasecmp(v->name, "hasvoicemail")) {
         if (type & (TYPE_LINE)) {
            if (ast_true(v->value) && ast_strlen_zero(CLINE->mailbox)) {
               ast_copy_string(CLINE->mailbox, CLINE->name, sizeof(CLINE->mailbox));
            }
            continue;
         }
      } else if (!strcasecmp(v->name, "threewaycalling")) {
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            CLINE_OPTS->threewaycalling = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "setvar")) {
         if (type & (TYPE_LINE)) {
            CLINE->chanvars = add_var(v->value, CLINE->chanvars);
            continue;
         }
      } else if (!strcasecmp(v->name, "earlyrtp")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE)) {
            CDEV_OPTS->earlyrtp = ast_true(v->value);
            continue;
         }
      } else if (!strcasecmp(v->name, "host")) {
         if (type & (TYPE_DEVICE)) {
            struct ast_sockaddr CDEV_addr_tmp;

            CDEV_addr_tmp.ss.ss_family = AF_INET;
            if (ast_get_ip(&CDEV_addr_tmp, v->value)) {
               ast_log(LOG_WARNING, "Bad IP '%s' at line %d.\n", v->value, v->lineno);
            }
            ast_sockaddr_to_sin(&CDEV_addr_tmp,
                      &CDEV->addr);
            continue;
         }
      } else if (!strcasecmp(v->name, "port")) {
         if (type & (TYPE_DEF_DEVICE)) {
            CDEV->addr.sin_port = htons(atoi(v->value));
            continue;
         }
      } else if (!strcasecmp(v->name, "device")) {
         if (type & (TYPE_DEVICE)) {
            ast_copy_string(CDEV_OPTS->id, v->value, sizeof(CDEV_OPTS->id));
            continue;
         }
      } else if (!strcasecmp(v->name, "permit") || !strcasecmp(v->name, "deny")) {
         if (type & (TYPE_DEVICE)) {
            CDEV->ha = ast_append_ha(v->name, v->value, CDEV->ha, NULL);
            continue;
         }
      } else if (!strcasecmp(v->name, "allow")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE)) {
            ast_parse_allow_disallow(&CDEV->confprefs, CDEV->confcap, v->value, 1);
            continue;
         }
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_parse_allow_disallow(&CLINE->confprefs, CLINE->confcap, v->value, 1);
            continue;
         }
      } else if (!strcasecmp(v->name, "disallow")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE)) {
            ast_parse_allow_disallow(&CDEV->confprefs, CDEV->confcap, v->value, 0);
            continue;
         }
         if (type & (TYPE_DEF_LINE | TYPE_LINE)) {
            ast_parse_allow_disallow(&CLINE->confprefs, CLINE->confcap, v->value, 0);
            continue;
         }
      } else if (!strcasecmp(v->name, "version")) {
         if (type & (TYPE_DEF_DEVICE | TYPE_DEVICE)) {
            ast_copy_string(CDEV_OPTS->version_id, v->value, sizeof(CDEV_OPTS->version_id));
            continue;
         }
      } else if (!strcasecmp(v->name, "line")) {
         if (type & (TYPE_DEVICE)) {
            struct skinny_line *l;
            AST_LIST_TRAVERSE(&lines, l, all) {
               if (!strcasecmp(v->value, l->name) && !l->prune) {

                  /* FIXME: temp solution about line conflicts */
                  struct skinny_device *d;
                  struct skinny_line *l2;
                  int lineinuse = 0;
                  AST_LIST_TRAVERSE(&devices, d, list) {
                     AST_LIST_TRAVERSE(&d->lines, l2, list) {
                        if (l2 == l && strcasecmp(d->id, CDEV->id)) {
                           ast_log(LOG_WARNING, "Line %s already used by %s. Not connecting to %s.\n", l->name, d->name, CDEV->name);
                           lineinuse++;
                        }
                     }
                  }
                  if (!lineinuse) {
                     if (!AST_LIST_FIRST(&CDEV->lines)) {
                        CDEV->activeline = l;
                     }
                     lineInstance++;
                     AST_LIST_INSERT_HEAD(&CDEV->lines, l, list);
                  }
                  break;
               }
            }
            continue;
         }
      } else if (!strcasecmp(v->name, "subline")) {
         if (type & (TYPE_LINE)) {
            struct skinny_subline *subline;
            struct skinny_container *container;
            char buf[256];
            char *stringp = buf, *exten, *stname, *context;

            if (!(subline = ast_calloc(1, sizeof(*subline)))) {
               ast_log(LOG_WARNING, "Unable to allocate memory for subline %s. Ignoring subline.\n", v->value);
               continue;
            }
            if (!(container = ast_calloc(1, sizeof(*container)))) {
               ast_log(LOG_WARNING, "Unable to allocate memory for subline %s container. Ignoring subline.\n", v->value);
               ast_free(subline);
               continue;
            }
            
            ast_copy_string(buf, v->value, sizeof(buf));
            exten = strsep(&stringp, "@");
            ast_copy_string(subline->exten, ast_strip(exten), sizeof(subline->exten));
            stname = strsep(&exten, "_");
            ast_copy_string(subline->stname, ast_strip(stname), sizeof(subline->stname));
            ast_copy_string(subline->lnname, ast_strip(exten), sizeof(subline->lnname));
            context = strsep(&stringp, ",");
            ast_copy_string(subline->name, ast_strip(stringp), sizeof(subline->name));
            ast_copy_string(subline->context, ast_strip(context), sizeof(subline->context));

            subline->line = CLINE;
            subline->sub = NULL;

            container->type = SKINNY_SUBLINECONTAINER;
            container->data = subline;
            subline->container = container;
            AST_LIST_INSERT_HEAD(&CLINE->sublines, subline, list);
            continue;
         }
      } else if (!strcasecmp(v->name, "dialoutcontext")) {
         if (type & (TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->dialoutcontext, v->value, sizeof(CLINE_OPTS->dialoutcontext));
            continue;
         }
      } else if (!strcasecmp(v->name, "dialoutexten")) {
         if (type & (TYPE_LINE)) {
            ast_copy_string(CLINE_OPTS->dialoutexten, v->value, sizeof(CLINE_OPTS->dialoutexten));
            continue;
         }
      } else if (!strcasecmp(v->name, "speeddial")) {
         if (type & (TYPE_DEVICE)) {
            struct skinny_speeddial *sd;
            struct skinny_container *container;
            char buf[256];
            char *stringp = buf, *exten, *context, *label;

            if (!(sd = ast_calloc(1, sizeof(*sd)))) {
               ast_log(LOG_WARNING, "Unable to allocate memory for speeddial %s. Ignoring speeddial.\n", v->name);
               continue;
            }
            if (!(container = ast_calloc(1, sizeof(*container)))) {
               ast_log(LOG_WARNING, "Unable to allocate memory for speeddial %s container. Ignoring speeddial.\n", v->name);
               ast_free(sd);
               continue;
            }

            ast_copy_string(buf, v->value, sizeof(buf));
            exten = strsep(&stringp, ",");
            if ((context = strchr(exten, '@'))) {
               *context++ = '\0';
            }
            label = stringp;
            ast_mutex_init(&sd->lock);
            ast_copy_string(sd->exten, exten, sizeof(sd->exten));
            if (!ast_strlen_zero(context)) {
               sd->isHint = 1;
               sd->instance = lineInstance++;
               ast_copy_string(sd->context, context, sizeof(sd->context));
            } else {
               sd->isHint = 0;
               sd->instance = speeddialInstance++;
               sd->context[0] = '\0';
            }
            ast_copy_string(sd->label, S_OR(label, exten), sizeof(sd->label));
            sd->parent = CDEV;
            container->type = SKINNY_SDCONTAINER;
            container->data = sd;
            sd->container = container;
            AST_LIST_INSERT_HEAD(&CDEV->speeddials, sd, list);
            continue;
         }
      } else if (!strcasecmp(v->name, "addon")) {
         if (type & (TYPE_DEVICE)) {
            struct skinny_addon *a;
            if (!(a = ast_calloc(1, sizeof(*a)))) {
               ast_log(LOG_WARNING, "Unable to allocate memory for addon %s. Ignoring addon.\n", v->name);
               continue;
            } else {
               ast_mutex_init(&a->lock);
               ast_copy_string(a->type, v->value, sizeof(a->type));
               AST_LIST_INSERT_HEAD(&CDEV->addons, a, list);
            }
            continue;
         }

      } else {
         ast_log(LOG_WARNING, "Don't know keyword '%s' at line %d\n", v->name, v->lineno);
         continue;
      }
      ast_log(LOG_WARNING, "Invalid category used: %s at line %d\n", v->name, v->lineno);
   }
 }
 
 static struct skinny_line *config_line(const char *lname, struct ast_variable *v)
 {
   struct skinny_line *l, *temp;
   int update = 0;
   struct skinny_container *container;
 
   ast_log(LOG_NOTICE, "Configuring skinny line %s.\n", lname);

   /* We find the old line and remove it just before the new
      line is created */
   AST_LIST_LOCK(&lines);
   AST_LIST_TRAVERSE(&lines, temp, all) {
      if (!strcasecmp(lname, temp->name) && temp->prune) {
         update = 1;
         break;
      }
   }

   if (!(l = skinny_line_alloc())) {
      ast_verb(1, "Unable to allocate memory for line %s.\n", lname);
      AST_LIST_UNLOCK(&lines);
      return NULL;
   }
   if (!(container = ast_calloc(1, sizeof(*container)))) {
      ast_log(LOG_WARNING, "Unable to allocate memory for line %s container.\n", lname);
      skinny_line_destroy(l);
      AST_LIST_UNLOCK(&lines);
      return NULL;
   }

   container->type = SKINNY_LINECONTAINER;
   container->data = l;
   l->container = container;
   
   memcpy(l, default_line, sizeof(*default_line));
   ast_mutex_init(&l->lock);
   ast_copy_string(l->name, lname, sizeof(l->name));
   ast_format_cap_copy(l->confcap, default_cap);
   AST_LIST_INSERT_TAIL(&lines, l, all);

   ast_mutex_lock(&l->lock);
   AST_LIST_UNLOCK(&lines);

   config_parse_variables(TYPE_LINE, l, v);
         
   if (!ast_strlen_zero(l->mailbox)) {
      char *cfg_mailbox, *cfg_context;
      cfg_context = cfg_mailbox = ast_strdupa(l->mailbox);
      ast_verb(3, "Setting mailbox '%s' on line %s\n", cfg_mailbox, l->name);
      strsep(&cfg_context, "@");
      if (ast_strlen_zero(cfg_context))
          cfg_context = "default";
      l->mwi_event_sub = ast_event_subscribe(AST_EVENT_MWI, mwi_event_cb, "skinny MWI subsciption", l,
         AST_EVENT_IE_MAILBOX, AST_EVENT_IE_PLTYPE_STR, cfg_mailbox,
         AST_EVENT_IE_CONTEXT, AST_EVENT_IE_PLTYPE_STR, cfg_context,
         AST_EVENT_IE_NEWMSGS, AST_EVENT_IE_PLTYPE_EXISTS,
         AST_EVENT_IE_END);
   }
 
   ast_mutex_unlock(&l->lock);
   
   /* We do not want to unlink or free the line yet, it needs
      to be available to detect a device reconfig when we load the
      devices.  Old lines will be pruned after the reload completes */

   ast_verb(3, "%s config for line '%s'\n", update ? "Updated" : (skinnyreload ? "Reloaded" : "Created"), l->name);

   return l;
 }
 
 static struct skinny_device *config_device(const char *dname, struct ast_variable *v)
 {
   struct skinny_device *d, *temp;
   struct skinny_line *l, *ltemp;
   struct skinny_subchannel *sub;
   int update = 0;
 
   ast_log(LOG_NOTICE, "Configuring skinny device %s.\n", dname);

   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE(&devices, temp, list) {
      if (!strcasecmp(dname, temp->name) && temp->prune) {
         update = 1;
         break;
      }
   }

   if (!(d = skinny_device_alloc())) {
      ast_verb(1, "Unable to allocate memory for device %s.\n", dname);
      AST_LIST_UNLOCK(&devices);
      return NULL;
   }
   memcpy(d, default_device, sizeof(*default_device));
   ast_mutex_init(&d->lock);
   ast_copy_string(d->name, dname, sizeof(d->name));
   ast_format_cap_copy(d->confcap, default_cap);
   AST_LIST_INSERT_TAIL(&devices, d, list);

   ast_mutex_lock(&d->lock);
   AST_LIST_UNLOCK(&devices);
 
   config_parse_variables(TYPE_DEVICE, d, v);
 
   if (!AST_LIST_FIRST(&d->lines)) {
      ast_log(LOG_ERROR, "A Skinny device must have at least one line!\n");
      ast_mutex_unlock(&d->lock);
      return NULL;
   }
   if (/*d->addr.sin_addr.s_addr && */!ntohs(d->addr.sin_port)) {
      d->addr.sin_port = htons(DEFAULT_SKINNY_PORT);
   }
 
   if (skinnyreload){
      AST_LIST_LOCK(&devices);
      AST_LIST_TRAVERSE(&devices, temp, list) {
         if (strcasecmp(d->id, temp->id) || !temp->prune || !temp->session) {
            continue;
         }
         ast_mutex_lock(&d->lock);
         d->session = temp->session;
         d->session->device = d;
         d->hookstate = temp->hookstate;

         AST_LIST_LOCK(&d->lines);
         AST_LIST_TRAVERSE(&d->lines, l, list){
            l->device = d; 

            AST_LIST_LOCK(&temp->lines);
            AST_LIST_TRAVERSE(&temp->lines, ltemp, list) {
               if (strcasecmp(l->name, ltemp->name)) {
                  continue;
               }
               ast_mutex_lock(&ltemp->lock);
               l->instance = ltemp->instance;
               if (!AST_LIST_EMPTY(&ltemp->sub)) {
                  ast_mutex_lock(&l->lock);
                  l->sub = ltemp->sub;
                  AST_LIST_TRAVERSE(&l->sub, sub, list) {
                     sub->line = l;
                  }
                  ast_mutex_unlock(&l->lock);
               }
               ast_mutex_unlock(&ltemp->lock);
            }
            AST_LIST_UNLOCK(&temp->lines);
         }
         AST_LIST_UNLOCK(&d->lines);
         ast_mutex_unlock(&d->lock);
      }
      AST_LIST_UNLOCK(&devices);
   }

   ast_mutex_unlock(&d->lock);

   ast_verb(3, "%s config for device '%s'\n", update ? "Updated" : (skinnyreload ? "Reloaded" : "Created"), d->name);
   
   return d;

 }
 
 static int config_load(void)
 {
   int on = 1;
   struct ast_config *cfg;
   char *cat;
   int oldport = ntohs(bindaddr.sin_port);
   struct ast_flags config_flags = { 0 };
   
   ast_log(LOG_NOTICE, "Configuring skinny from %s\n", config);
  
   if (gethostname(ourhost, sizeof(ourhost))) {
      ast_log(LOG_WARNING, "Unable to get hostname, Skinny disabled.\n");
      return 0;
   }
   cfg = ast_config_load(config, config_flags);
  
   /* We *must* have a config file otherwise stop immediately */
   if (!cfg || cfg == CONFIG_STATUS_FILEINVALID) {
      ast_log(LOG_NOTICE, "Unable to load config %s, Skinny disabled.\n", config);
      return -1;
   }
   memset(&bindaddr, 0, sizeof(bindaddr));
   memset(&default_prefs, 0, sizeof(default_prefs));

   /* Copy the default jb config over global_jbconf */
   memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));

   /* load the general section */
   cat = ast_category_browse(cfg, "general");
   config_parse_variables(TYPE_GENERAL, NULL, ast_variable_browse(cfg, "general"));

   if (ntohl(bindaddr.sin_addr.s_addr)) {
      __ourip = bindaddr.sin_addr;
   } else {
      hp = ast_gethostbyname(ourhost, &ahp);
      if (!hp) {
         ast_log(LOG_WARNING, "Unable to get our IP address, Skinny disabled\n");
         ast_config_destroy(cfg);
         return 0;
      }
      memcpy(&__ourip, hp->h_addr, sizeof(__ourip));
   }
   if (!ntohs(bindaddr.sin_port)) {
      bindaddr.sin_port = htons(DEFAULT_SKINNY_PORT);
   }
   bindaddr.sin_family = AF_INET;

   /* load the lines sections */
   default_line->confprefs = default_prefs;
   config_parse_variables(TYPE_DEF_LINE, default_line, ast_variable_browse(cfg, "lines"));
   cat = ast_category_browse(cfg, "lines");
   while (cat && strcasecmp(cat, "general") && strcasecmp(cat, "devices")) {
      config_line(cat, ast_variable_browse(cfg, cat));
      cat = ast_category_browse(cfg, cat);
   }
      
   /* load the devices sections */
   default_device->confprefs = default_prefs;
   config_parse_variables(TYPE_DEF_DEVICE, default_device, ast_variable_browse(cfg, "devices"));
   cat = ast_category_browse(cfg, "devices");
   while (cat && strcasecmp(cat, "general") && strcasecmp(cat, "lines")) {
      config_device(cat, ast_variable_browse(cfg, cat));
      cat = ast_category_browse(cfg, cat);
   }

   ast_mutex_lock(&netlock);
   if ((skinnysock > -1) && (ntohs(bindaddr.sin_port) != oldport)) {
      close(skinnysock);
      skinnysock = -1;
   }
   if (skinnysock < 0) {
      skinnysock = socket(AF_INET, SOCK_STREAM, 0);
      if(setsockopt(skinnysock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
         ast_log(LOG_ERROR, "Set Socket Options failed: errno %d, %s\n", errno, strerror(errno));
         ast_config_destroy(cfg);
         ast_mutex_unlock(&netlock);
         return 0;
      }
      if (skinnysock < 0) {
         ast_log(LOG_WARNING, "Unable to create Skinny socket: %s\n", strerror(errno));
      } else {
         if (bind(skinnysock, (struct sockaddr *)&bindaddr, sizeof(bindaddr)) < 0) {
            ast_log(LOG_WARNING, "Failed to bind to %s:%d: %s\n",
                  ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port),
                     strerror(errno));
            close(skinnysock);
            skinnysock = -1;
            ast_config_destroy(cfg);
            ast_mutex_unlock(&netlock);
            return 0;
         }
         if (listen(skinnysock, DEFAULT_SKINNY_BACKLOG)) {
               ast_log(LOG_WARNING, "Failed to start listening to %s:%d: %s\n",
                  ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port),
                     strerror(errno));
               close(skinnysock);
               skinnysock = -1;
               ast_config_destroy(cfg);
               ast_mutex_unlock(&netlock);
               return 0;
         }
         ast_verb(2, "Skinny listening on %s:%d\n",
               ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port));
         ast_netsock_set_qos(skinnysock, qos.tos, qos.cos, "Skinny");
         ast_pthread_create_background(&accept_t, NULL, accept_thread, NULL);
      }
   }
   ast_mutex_unlock(&netlock);
   ast_config_destroy(cfg);
   return 1;
}

static void delete_devices(void)
{
   struct skinny_device *d;
   struct skinny_line *l;
   struct skinny_speeddial *sd;
   struct skinny_addon *a;

   AST_LIST_LOCK(&devices);
   AST_LIST_LOCK(&lines);

   /* Delete all devices */
   while ((d = AST_LIST_REMOVE_HEAD(&devices, list))) {
      /* Delete all lines for this device */
      while ((l = AST_LIST_REMOVE_HEAD(&d->lines, list))) {
         AST_LIST_REMOVE(&lines, l, all);
         AST_LIST_REMOVE(&d->lines, l, list);
         l = skinny_line_destroy(l);
      }
      /* Delete all speeddials for this device */
      while ((sd = AST_LIST_REMOVE_HEAD(&d->speeddials, list))) {
         free(sd->container);
         free(sd);
      }
      /* Delete all addons for this device */
      while ((a = AST_LIST_REMOVE_HEAD(&d->addons, list))) {
         free(a);
      }
      d = skinny_device_destroy(d);
   }
   AST_LIST_UNLOCK(&lines);
   AST_LIST_UNLOCK(&devices);
}

int skinny_reload(void)
{
   struct skinny_device *d;
   struct skinny_line *l;
   struct skinny_speeddial *sd;
   struct skinny_addon *a;
   struct skinny_req *req;

   if (skinnyreload) {
      ast_verb(3, "Chan_skinny is already reloading.\n");
      return 0;
   }

   skinnyreload = 1;

   /* Mark all devices and lines as candidates to be pruned */
   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE(&devices, d, list) {
      d->prune = 1;
   }
   AST_LIST_UNLOCK(&devices);

   AST_LIST_LOCK(&lines);
   AST_LIST_TRAVERSE(&lines, l, all) {
      l->prune = 1;
   }
   AST_LIST_UNLOCK(&lines);

        config_load();

   /* Remove any devices that no longer exist in the config */
   AST_LIST_LOCK(&devices);
   AST_LIST_TRAVERSE_SAFE_BEGIN(&devices, d, list) {
      if (!d->prune) {
         continue;
      }
      ast_verb(3, "Removing device '%s'\n", d->name);
      /* Delete all lines for this device. 
         We do not want to free the line here, that
         will happen below. */
      while ((l = AST_LIST_REMOVE_HEAD(&d->lines, list))) {
      }
      /* Delete all speeddials for this device */
      while ((sd = AST_LIST_REMOVE_HEAD(&d->speeddials, list))) {
         free(sd);
      }
      /* Delete all addons for this device */
      while ((a = AST_LIST_REMOVE_HEAD(&d->addons, list))) {
         free(a);
      }
      AST_LIST_REMOVE_CURRENT(list);
      d = skinny_device_destroy(d);
   }
   AST_LIST_TRAVERSE_SAFE_END;
   AST_LIST_UNLOCK(&devices);

   AST_LIST_LOCK(&lines);  
   AST_LIST_TRAVERSE_SAFE_BEGIN(&lines, l, all) {
      if (l->prune) {
         AST_LIST_REMOVE_CURRENT(all);
         l = skinny_line_destroy(l);
      }
   }
   AST_LIST_TRAVERSE_SAFE_END;
   AST_LIST_UNLOCK(&lines);  

   AST_LIST_TRAVERSE(&devices, d, list) {
      /* Do a soft reset to re-register the devices after
         cleaning up the removed devices and lines */
      if (d->session) {
         ast_verb(3, "Restarting device '%s'\n", d->name);
         if ((req = req_alloc(sizeof(struct reset_message), RESET_MESSAGE))) {
            req->data.reset.resetType = 2;
            transmit_response(d, req);
         }
      }
   }
   
   skinnyreload = 0;
        return 0;
}

static int load_module(void)
{
   int res = 0;
   struct ast_format tmpfmt;
   if (!(default_cap = ast_format_cap_alloc())) {
      return AST_MODULE_LOAD_DECLINE;
   }
   if (!(skinny_tech.capabilities = ast_format_cap_alloc())) {
      return AST_MODULE_LOAD_DECLINE;
   }

   ast_format_cap_add_all_by_type(skinny_tech.capabilities, AST_FORMAT_TYPE_AUDIO);
   ast_format_cap_add(default_cap, ast_format_set(&tmpfmt, AST_FORMAT_ULAW, 0));
   ast_format_cap_add(default_cap, ast_format_set(&tmpfmt, AST_FORMAT_ALAW, 0));

   for (; res < ARRAY_LEN(soft_key_template_default); res++) {
      soft_key_template_default[res].softKeyEvent = htolel(soft_key_template_default[res].softKeyEvent);
   }
   /* load and parse config */
   res = config_load();
   if (res == -1) {
      return AST_MODULE_LOAD_DECLINE;
   }

   /* Make sure we can register our skinny channel type */
   if (ast_channel_register(&skinny_tech)) {
      ast_log(LOG_ERROR, "Unable to register channel class 'Skinny'\n");
      return -1;
   }

   ast_rtp_glue_register(&skinny_rtp_glue);
   ast_cli_register_multiple(cli_skinny, ARRAY_LEN(cli_skinny));

   ast_manager_register_xml("SKINNYdevices", EVENT_FLAG_SYSTEM | EVENT_FLAG_REPORTING, manager_skinny_show_devices);
   ast_manager_register_xml("SKINNYshowdevice", EVENT_FLAG_SYSTEM | EVENT_FLAG_REPORTING, manager_skinny_show_device);
   ast_manager_register_xml("SKINNYlines", EVENT_FLAG_SYSTEM | EVENT_FLAG_REPORTING, manager_skinny_show_lines);
   ast_manager_register_xml("SKINNYshowline", EVENT_FLAG_SYSTEM | EVENT_FLAG_REPORTING, manager_skinny_show_line);

   sched = ast_sched_context_create();
   if (!sched) {
      ast_log(LOG_WARNING, "Unable to create schedule context\n");
      return AST_MODULE_LOAD_FAILURE;
   }
   if (ast_sched_start_thread(sched)) {
      ast_sched_context_destroy(sched);
      sched = NULL;
      return AST_MODULE_LOAD_FAILURE;
   }

   return AST_MODULE_LOAD_SUCCESS;
}

static int unload_module(void)
{
   struct skinnysession *s;
   struct skinny_device *d;
   struct skinny_line *l;
   struct skinny_subchannel *sub;
   struct ast_context *con;

   ast_rtp_glue_unregister(&skinny_rtp_glue);
   ast_channel_unregister(&skinny_tech);
   ast_cli_unregister_multiple(cli_skinny, ARRAY_LEN(cli_skinny));

   ast_manager_unregister("SKINNYdevices");
   ast_manager_unregister("SKINNYshowdevice");
   ast_manager_unregister("SKINNYlines");
   ast_manager_unregister("SKINNYshowline");
   
   AST_LIST_LOCK(&sessions);
   /* Destroy all the interfaces and free their memory */
   while((s = AST_LIST_REMOVE_HEAD(&sessions, list))) {
      d = s->device;
      AST_LIST_TRAVERSE(&d->lines, l, list){
         ast_mutex_lock(&l->lock);
         AST_LIST_TRAVERSE(&l->sub, sub, list) {
            ast_mutex_lock(&sub->lock);
            if (sub->owner) {
               ast_softhangup(sub->owner, AST_SOFTHANGUP_APPUNLOAD);
            }
            ast_mutex_unlock(&sub->lock);
         }
         if (l->mwi_event_sub)
            ast_event_unsubscribe(l->mwi_event_sub);
         ast_mutex_unlock(&l->lock);
         manager_event(EVENT_FLAG_SYSTEM, "PeerStatus", "ChannelType: Skinny\r\nPeer: Skinny/%s@%s\r\nPeerStatus: Unregistered\r\n", l->name, d->name);
         unregister_exten(l);
      }
      if (s->fd > -1)
         close(s->fd);
      pthread_cancel(s->t);
      pthread_kill(s->t, SIGURG);
      pthread_join(s->t, NULL);
      free(s);
   }
   AST_LIST_UNLOCK(&sessions);

   delete_devices();

   ast_mutex_lock(&netlock);
   if (accept_t && (accept_t != AST_PTHREADT_STOP)) {
      pthread_cancel(accept_t);
      pthread_kill(accept_t, SIGURG);
      pthread_join(accept_t, NULL);
   }
   accept_t = AST_PTHREADT_STOP;
   ast_mutex_unlock(&netlock);

   close(skinnysock);
   if (sched) {
      ast_sched_context_destroy(sched);
   }

   con = ast_context_find(used_context);
   if (con)
      ast_context_destroy(con, "Skinny");

   default_cap = ast_format_cap_destroy(default_cap);
   skinny_tech.capabilities = ast_format_cap_destroy(skinny_tech.capabilities);
   return 0;
}

static int reload(void)
{
   skinny_reload();
   return 0;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Skinny Client Control Protocol (Skinny)",
      .load = load_module,
      .unload = unload_module,
      .reload = reload,
      .load_pri = AST_MODPRI_CHANNEL_DRIVER,
);