Sat Nov 1 06:28:34 2008

Asterisk developer's documentation

---

isdn_msg_parser.c

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/*
 * Chan_Misdn -- Channel Driver for Asterisk
 *
 * Interface to mISDN
 *
 * Copyright (C) 2004, Christian Richter
 *
 * Christian Richter <crich@beronet.com>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */


#include "isdn_lib_intern.h"


#include "isdn_lib.h"

#include "ie.c"


static void set_channel(struct misdn_bchannel *bc, int channel)
{

   cb_log(3,bc->port,"set_channel: bc->channel:%d channel:%d\n", bc->channel, channel);
   
   
   if (channel==0xff) {
      /* any channel */
      channel=-1;
   }
   
   /*  ALERT: is that everytime true ?  */
   if (channel > 0 && bc->nt ) {
      
      if (bc->channel && ( bc->channel != 0xff) ) {
         cb_log(0,bc->port,"We already have a channel (%d)\n", bc->channel);
      } else {
         bc->channel = channel;
         cb_event(EVENT_NEW_CHANNEL,bc,NULL);
      }
   }
   
   if (channel > 0 && !bc->nt ) {
      bc->channel = channel;
      cb_event(EVENT_NEW_CHANNEL,bc,NULL);
   }
}

static void parse_proceeding (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   CALL_PROCEEDING_t *proceeding=(CALL_PROCEEDING_t*)((unsigned long)msg->data+ HEADER_LEN);
   //struct misdn_stack *stack=get_stack_by_bc(bc);
   
   {
      int  exclusive, channel;
      dec_ie_channel_id(proceeding->CHANNEL_ID, (Q931_info_t *)proceeding, &exclusive, &channel, nt,bc);

      set_channel(bc,channel);
      
   }
   
   dec_ie_progress(proceeding->PROGRESS, (Q931_info_t *)proceeding, &bc->progress_coding, &bc->progress_location, &bc->progress_indicator, nt, bc);
   
   
#if DEBUG 
   printf("Parsing PROCEEDING Msg\n"); 
#endif
}
static msg_t *build_proceeding (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   CALL_PROCEEDING_t *proceeding;
   msg_t *msg =(msg_t*)create_l3msg(CC_PROCEEDING | REQUEST, MT_CALL_PROCEEDING,  bc?bc->l3_id:-1, sizeof(CALL_PROCEEDING_t) ,nt); 
  
   proceeding=(CALL_PROCEEDING_t*)((msg->data+HEADER_LEN));

   enc_ie_channel_id(&proceeding->CHANNEL_ID, msg, 1,bc->channel, nt,bc);
  
   if (nt) 
      enc_ie_progress(&proceeding->PROGRESS, msg, 0, nt?1:5, 8, nt,bc);
  

#if DEBUG 
   printf("Building PROCEEDING Msg\n"); 
#endif
   return msg; 
}

static void parse_alerting (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN; 
   ALERTING_t *alerting=(ALERTING_t*)((unsigned long)(msg->data+HEADER_LEN));
   //Q931_info_t *qi=(Q931_info_t*)(msg->data+HEADER_LEN);
   
   dec_ie_progress(alerting->PROGRESS, (Q931_info_t *)alerting, &bc->progress_coding, &bc->progress_location, &bc->progress_indicator, nt, bc);
   
#if DEBUG 
   printf("Parsing ALERTING Msg\n"); 
#endif

 
}

static msg_t *build_alerting (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   ALERTING_t *alerting;
   msg_t *msg =(msg_t*)create_l3msg(CC_ALERTING | REQUEST, MT_ALERTING,  bc?bc->l3_id:-1, sizeof(ALERTING_t) ,nt); 
  
   alerting=(ALERTING_t*)((msg->data+HEADER_LEN)); 
  
   enc_ie_channel_id(&alerting->CHANNEL_ID, msg, 1,bc->channel, nt,bc);
   
   if (nt) 
      enc_ie_progress(&alerting->PROGRESS, msg, 0, nt?1:5, 8, nt,bc);
#if DEBUG 
   printf("Building ALERTING Msg\n"); 
#endif
   return msg; 
}


static void parse_progress (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   PROGRESS_t *progress=(PROGRESS_t*)((unsigned long)(msg->data+HEADER_LEN)); 
   //Q931_info_t *qi=(Q931_info_t*)(msg->data+HEADER_LEN);  
   
   dec_ie_progress(progress->PROGRESS, (Q931_info_t *)progress, &bc->progress_coding, &bc->progress_location, &bc->progress_indicator, nt, bc);
   
#if DEBUG 
   printf("Parsing PROGRESS Msg\n"); 
#endif
}

static msg_t *build_progress (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   PROGRESS_t *progress;
   msg_t *msg =(msg_t*)create_l3msg(CC_PROGRESS | REQUEST, MT_PROGRESS,  bc?bc->l3_id:-1, sizeof(PROGRESS_t) ,nt); 
 
   progress=(PROGRESS_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building PROGRESS Msg\n"); 
#endif
   return msg; 
}

static void parse_setup (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{ 
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   SETUP_t *setup= (SETUP_t*)((unsigned long)msg->data+HEADER_LEN);
   Q931_info_t *qi=(Q931_info_t*)((unsigned long)msg->data+HEADER_LEN);

#if DEBUG 
   printf("Parsing SETUP Msg\n"); 
#endif
   {
      int type,plan,present, screen;
      char id[32];
      dec_ie_calling_pn(setup->CALLING_PN, qi, &type, &plan, &present, &screen, id, sizeof(id)-1, nt,bc);

      bc->onumplan=type; 
      strcpy(bc->oad, id);
      switch (present) {
      case 0:
         bc->pres=0; /* screened */
         break;
      case 1:
         bc->pres=1; /* not screened */
         break;
      default:
         bc->pres=0;
      }
      switch (screen) {
      case 0:
         break;
      default:
         ;
      } 
   }
   {
      int  type, plan;
      char number[32]; 
      dec_ie_called_pn(setup->CALLED_PN, (Q931_info_t *)setup, &type, &plan, number, sizeof(number)-1, nt,bc);
      strcpy(bc->dad, number);
      bc->dnumplan=type; 
   }
   {
      char keypad[32];
      dec_ie_keypad(setup->KEYPAD, (Q931_info_t *)setup, keypad, sizeof(keypad)-1, nt,bc);
      strcpy(bc->keypad, keypad);
   }

   {
      dec_ie_complete(setup->COMPLETE, (Q931_info_t *)setup, &bc->sending_complete, nt,bc);
      
   }
  
   {
      int  type, plan, present, screen, reason;
      char id[32]; 
      dec_ie_redir_nr(setup->REDIR_NR, (Q931_info_t *)setup, &type, &plan, &present, &screen, &reason, id, sizeof(id)-1, nt,bc);
    
      strcpy(bc->rad, id);
      bc->rnumplan=type; 
   }
   {
      int  coding, capability, mode, rate, multi, user, async, urate, stopbits, dbits, parity;
      dec_ie_bearer(setup->BEARER, (Q931_info_t *)setup, &coding, &capability, &mode, &rate, &multi, &user, &async, &urate, &stopbits, &dbits, &parity, nt,bc);
      switch (capability) {
      case -1: bc->capability=INFO_CAPABILITY_DIGITAL_UNRESTRICTED; 
         break;
      case 0: bc->capability=INFO_CAPABILITY_SPEECH;
         break;
      case 18: bc->capability=INFO_CAPABILITY_VIDEO;
         break;
      case 8: bc->capability=INFO_CAPABILITY_DIGITAL_UNRESTRICTED;
         bc->user1 = user;
         bc->urate = urate;
         
         bc->rate = rate;
         bc->mode = mode;
         break;
      case 9: bc->capability=INFO_CAPABILITY_DIGITAL_RESTRICTED;
         break;
      default:
         break;
      }
      
      switch(user) {
      case 2:
         bc->law=INFO_CODEC_ULAW;
         break;
      case 3:
         bc->law=INFO_CODEC_ALAW;
         break;
      default:
         bc->law=INFO_CODEC_ALAW;
         
      }
      
      bc->capability=capability; 
   }
   {
      int  exclusive, channel;
      dec_ie_channel_id(setup->CHANNEL_ID, (Q931_info_t *)setup, &exclusive, &channel, nt,bc);
      
      set_channel(bc,channel);
   }

   {
      int  protocol ;
      dec_ie_useruser(setup->USER_USER, (Q931_info_t *)setup, &protocol, bc->uu, &bc->uulen, nt,bc);
      if (bc->uulen) cb_log(1,bc->port,"USERUESRINFO:%s\n",bc->uu);
      else
      cb_log(1,bc->port,"NO USERUESRINFO\n");
   }
   
   dec_ie_progress(setup->PROGRESS, (Q931_info_t *)setup, &bc->progress_coding, &bc->progress_location, &bc->progress_indicator, nt, bc);
   
}

#define ANY_CHANNEL 0xff /* IE attribut for 'any channel' */
static msg_t *build_setup (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   SETUP_t *setup;
   msg_t *msg =(msg_t*)create_l3msg(CC_SETUP | REQUEST, MT_SETUP,  bc?bc->l3_id:-1, sizeof(SETUP_t) ,nt); 
  
   setup=(SETUP_t*)((msg->data+HEADER_LEN)); 
  
   if (bc->channel == 0 || bc->channel == ANY_CHANNEL || bc->channel==-1)
      enc_ie_channel_id(&setup->CHANNEL_ID, msg, 0, bc->channel, nt,bc);
   else 
      enc_ie_channel_id(&setup->CHANNEL_ID, msg, 1, bc->channel, nt,bc);
   
   
   {
      int type=bc->onumplan,plan=1,present=bc->pres,screen=bc->screen;
      enc_ie_calling_pn(&setup->CALLING_PN, msg, type, plan, present,
              screen, bc->oad, nt, bc);
   }
  
   {
      if (bc->dad[0])
         enc_ie_called_pn(&setup->CALLED_PN, msg, bc->dnumplan, 1, bc->dad, nt,bc);
   }

   {
      if (bc->rad[0])
         enc_ie_redir_nr(&setup->REDIR_NR, msg, 1, 1,  bc->pres, bc->screen, 0, bc->rad, nt,bc);
   }

   {
      if (bc->keypad[0])
         enc_ie_keypad(&setup->KEYPAD, msg, bc->keypad, nt,bc);
   }
   
  
   if (*bc->display) {
      enc_ie_display(&setup->DISPLAY, msg, bc->display, nt,bc);
   }
  
   {
      int coding=0, capability, mode=0 /*  2 for packet ! */
         ,user, rate=0x10;

      switch (bc->law) {
      case INFO_CODEC_ULAW: user=2;
         break;
      case INFO_CODEC_ALAW: user=3;
         break;
      default:
         user=3;
      }
      
      switch (bc->capability) {
      case INFO_CAPABILITY_SPEECH: capability = 0;
         break;
      case INFO_CAPABILITY_DIGITAL_UNRESTRICTED: capability = 8;
         user=-1;
         mode=bc->mode;
         rate=bc->rate;
         break;
      case INFO_CAPABILITY_DIGITAL_RESTRICTED: capability = 9;
         user=-1;
         break;
      default:
         capability=bc->capability; 
      }
      
      
    
      enc_ie_bearer(&setup->BEARER, msg, coding, capability, mode, rate, -1, user, nt,bc);
   }

   if (bc->sending_complete) {
      enc_ie_complete(&setup->COMPLETE,msg, bc->sending_complete, nt, bc);
   }
  
   if (bc->uulen) {
      int  protocol=4;
      enc_ie_useruser(&setup->USER_USER, msg, protocol, bc->uu, bc->uulen, nt,bc);
      cb_log(1,bc->port,"ENCODING USERUESRINFO:%s\n",bc->uu);
   }

#if DEBUG 
   printf("Building SETUP Msg\n"); 
#endif
   return msg; 
}

static void parse_connect (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   CONNECT_t *connect=(CONNECT_t*)((unsigned long)(msg->data+HEADER_LEN));
  
   int plan,pres,screen;
   
   bc->ces = connect->ces;
   bc->ces = connect->ces;

   dec_ie_progress(connect->PROGRESS, (Q931_info_t *)connect, &bc->progress_coding, &bc->progress_location, &bc->progress_indicator, nt, bc);

   dec_ie_connected_pn(connect->CONNECT_PN,(Q931_info_t *)connect, &bc->cpnnumplan, &plan, &pres, &screen, bc->cad, 31, nt, bc);

   /*
      cb_log(1,bc->port,"CONNETED PN: %s cpn_dialplan:%d\n", connected_pn, type);
   */
   
#if DEBUG 
   printf("Parsing CONNECT Msg\n"); 
#endif
}

static msg_t *build_connect (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   CONNECT_t *connect;
   msg_t *msg =(msg_t*)create_l3msg(CC_CONNECT | REQUEST, MT_CONNECT,  bc?bc->l3_id:-1, sizeof(CONNECT_t) ,nt); 
   
   cb_log(6,bc->port,"BUILD_CONNECT: bc:%p bc->l3id:%d, nt:%d\n",bc,bc->l3_id,nt);

   connect=(CONNECT_t*)((msg->data+HEADER_LEN)); 

   if (nt) {
      time_t now;
      time(&now);
      enc_ie_date(&connect->DATE, msg, now, nt,bc);
   }
  
   {
      int type=bc->cpnnumplan, plan=1, present=2, screen=0;
      enc_ie_connected_pn(&connect->CONNECT_PN, msg, type,plan, present, screen, bc->cad, nt , bc);
   }

#if DEBUG 
   printf("Building CONNECT Msg\n"); 
#endif
   return msg; 
}

static void parse_setup_acknowledge (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   SETUP_ACKNOWLEDGE_t *setup_acknowledge=(SETUP_ACKNOWLEDGE_t*)((unsigned long)(msg->data+HEADER_LEN));

   {
      int  exclusive, channel;
      dec_ie_channel_id(setup_acknowledge->CHANNEL_ID, (Q931_info_t *)setup_acknowledge, &exclusive, &channel, nt,bc);


      set_channel(bc, channel);
   }
   
   dec_ie_progress(setup_acknowledge->PROGRESS, (Q931_info_t *)setup_acknowledge, &bc->progress_coding, &bc->progress_location, &bc->progress_indicator, nt, bc);
#if DEBUG 
   printf("Parsing SETUP_ACKNOWLEDGE Msg\n"); 
#endif

 
}

static msg_t *build_setup_acknowledge (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   SETUP_ACKNOWLEDGE_t *setup_acknowledge;
   msg_t *msg =(msg_t*)create_l3msg(CC_SETUP_ACKNOWLEDGE | REQUEST, MT_SETUP_ACKNOWLEDGE,  bc?bc->l3_id:-1, sizeof(SETUP_ACKNOWLEDGE_t) ,nt); 
 
   setup_acknowledge=(SETUP_ACKNOWLEDGE_t*)((msg->data+HEADER_LEN)); 
  
   enc_ie_channel_id(&setup_acknowledge->CHANNEL_ID, msg, 1,bc->channel, nt,bc);
  
   if (nt) 
      enc_ie_progress(&setup_acknowledge->PROGRESS, msg, 0, nt?1:5, 8, nt,bc);
  
#if DEBUG 
   printf("Building SETUP_ACKNOWLEDGE Msg\n"); 
#endif
   return msg; 
}

static void parse_connect_acknowledge (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing CONNECT_ACKNOWLEDGE Msg\n"); 
#endif

 
}

static msg_t *build_connect_acknowledge (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   CONNECT_ACKNOWLEDGE_t *connect_acknowledge;
   msg_t *msg =(msg_t*)create_l3msg(CC_CONNECT | RESPONSE, MT_CONNECT,  bc?bc->l3_id:-1, sizeof(CONNECT_ACKNOWLEDGE_t) ,nt); 
 
   connect_acknowledge=(CONNECT_ACKNOWLEDGE_t*)((msg->data+HEADER_LEN)); 
  
   enc_ie_channel_id(&connect_acknowledge->CHANNEL_ID, msg, 1, bc->channel, nt,bc);
  
#if DEBUG 
   printf("Building CONNECT_ACKNOWLEDGE Msg\n"); 
#endif
   return msg; 
}

static void parse_user_information (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing USER_INFORMATION Msg\n"); 
#endif

 
}

static msg_t *build_user_information (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   USER_INFORMATION_t *user_information;
   msg_t *msg =(msg_t*)create_l3msg(CC_USER_INFORMATION | REQUEST, MT_USER_INFORMATION,  bc?bc->l3_id:-1, sizeof(USER_INFORMATION_t) ,nt); 
 
   user_information=(USER_INFORMATION_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building USER_INFORMATION Msg\n"); 
#endif
   return msg; 
}

static void parse_suspend_reject (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing SUSPEND_REJECT Msg\n"); 
#endif

 
}

static msg_t *build_suspend_reject (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   SUSPEND_REJECT_t *suspend_reject;
   msg_t *msg =(msg_t*)create_l3msg(CC_SUSPEND_REJECT | REQUEST, MT_SUSPEND_REJECT,  bc?bc->l3_id:-1, sizeof(SUSPEND_REJECT_t) ,nt); 
 
   suspend_reject=(SUSPEND_REJECT_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building SUSPEND_REJECT Msg\n"); 
#endif
   return msg; 
}

static void parse_resume_reject (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing RESUME_REJECT Msg\n"); 
#endif

 
}

static msg_t *build_resume_reject (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RESUME_REJECT_t *resume_reject;
   msg_t *msg =(msg_t*)create_l3msg(CC_RESUME_REJECT | REQUEST, MT_RESUME_REJECT,  bc?bc->l3_id:-1, sizeof(RESUME_REJECT_t) ,nt); 
 
   resume_reject=(RESUME_REJECT_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building RESUME_REJECT Msg\n"); 
#endif
   return msg; 
}

static void parse_hold (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing HOLD Msg\n"); 
#endif

 
}

static msg_t *build_hold (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   HOLD_t *hold;
   msg_t *msg =(msg_t*)create_l3msg(CC_HOLD | REQUEST, MT_HOLD,  bc?bc->l3_id:-1, sizeof(HOLD_t) ,nt); 
 
   hold=(HOLD_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building HOLD Msg\n"); 
#endif
   return msg; 
}

static void parse_suspend (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing SUSPEND Msg\n"); 
#endif

 
}

static msg_t *build_suspend (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   SUSPEND_t *suspend;
   msg_t *msg =(msg_t*)create_l3msg(CC_SUSPEND | REQUEST, MT_SUSPEND,  bc?bc->l3_id:-1, sizeof(SUSPEND_t) ,nt); 
 
   suspend=(SUSPEND_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building SUSPEND Msg\n"); 
#endif
   return msg; 
}

static void parse_resume (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing RESUME Msg\n"); 
#endif

 
}

static msg_t *build_resume (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RESUME_t *resume;
   msg_t *msg =(msg_t*)create_l3msg(CC_RESUME | REQUEST, MT_RESUME,  bc?bc->l3_id:-1, sizeof(RESUME_t) ,nt); 
 
   resume=(RESUME_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building RESUME Msg\n"); 
#endif
   return msg; 
}

static void parse_hold_acknowledge (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing HOLD_ACKNOWLEDGE Msg\n"); 
#endif

 
}

static msg_t *build_hold_acknowledge (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   HOLD_ACKNOWLEDGE_t *hold_acknowledge;
   msg_t *msg =(msg_t*)create_l3msg(CC_HOLD_ACKNOWLEDGE | REQUEST, MT_HOLD_ACKNOWLEDGE,  bc?bc->l3_id:-1, sizeof(HOLD_ACKNOWLEDGE_t) ,nt); 
 
   hold_acknowledge=(HOLD_ACKNOWLEDGE_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building HOLD_ACKNOWLEDGE Msg\n"); 
#endif
   return msg; 
}

static void parse_suspend_acknowledge (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing SUSPEND_ACKNOWLEDGE Msg\n"); 
#endif

 
}

static msg_t *build_suspend_acknowledge (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   SUSPEND_ACKNOWLEDGE_t *suspend_acknowledge;
   msg_t *msg =(msg_t*)create_l3msg(CC_SUSPEND_ACKNOWLEDGE | REQUEST, MT_SUSPEND_ACKNOWLEDGE,  bc?bc->l3_id:-1, sizeof(SUSPEND_ACKNOWLEDGE_t) ,nt); 
 
   suspend_acknowledge=(SUSPEND_ACKNOWLEDGE_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building SUSPEND_ACKNOWLEDGE Msg\n"); 
#endif
   return msg; 
}

static void parse_resume_acknowledge (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing RESUME_ACKNOWLEDGE Msg\n"); 
#endif

 
}

static msg_t *build_resume_acknowledge (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RESUME_ACKNOWLEDGE_t *resume_acknowledge;
   msg_t *msg =(msg_t*)create_l3msg(CC_RESUME_ACKNOWLEDGE | REQUEST, MT_RESUME_ACKNOWLEDGE,  bc?bc->l3_id:-1, sizeof(RESUME_ACKNOWLEDGE_t) ,nt); 
 
   resume_acknowledge=(RESUME_ACKNOWLEDGE_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building RESUME_ACKNOWLEDGE Msg\n"); 
#endif
   return msg; 
}

static void parse_hold_reject (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing HOLD_REJECT Msg\n"); 
#endif

 
}

static msg_t *build_hold_reject (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   HOLD_REJECT_t *hold_reject;
   msg_t *msg =(msg_t*)create_l3msg(CC_HOLD_REJECT | REQUEST, MT_HOLD_REJECT,  bc?bc->l3_id:-1, sizeof(HOLD_REJECT_t) ,nt); 
 
   hold_reject=(HOLD_REJECT_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building HOLD_REJECT Msg\n"); 
#endif
   return msg; 
}

static void parse_retrieve (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing RETRIEVE Msg\n"); 
#endif

 
}

static msg_t *build_retrieve (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RETRIEVE_t *retrieve;
   msg_t *msg =(msg_t*)create_l3msg(CC_RETRIEVE | REQUEST, MT_RETRIEVE,  bc?bc->l3_id:-1, sizeof(RETRIEVE_t) ,nt); 
 
   retrieve=(RETRIEVE_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building RETRIEVE Msg\n"); 
#endif
   return msg; 
}

static void parse_retrieve_acknowledge (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing RETRIEVE_ACKNOWLEDGE Msg\n"); 
#endif

 
}

static msg_t *build_retrieve_acknowledge (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RETRIEVE_ACKNOWLEDGE_t *retrieve_acknowledge;
   msg_t *msg =(msg_t*)create_l3msg(CC_RETRIEVE_ACKNOWLEDGE | REQUEST, MT_RETRIEVE_ACKNOWLEDGE,  bc?bc->l3_id:-1, sizeof(RETRIEVE_ACKNOWLEDGE_t) ,nt); 
 
   retrieve_acknowledge=(RETRIEVE_ACKNOWLEDGE_t*)((msg->data+HEADER_LEN)); 

   enc_ie_channel_id(&retrieve_acknowledge->CHANNEL_ID, msg, 1, bc->channel, nt,bc);
#if DEBUG 
   printf("Building RETRIEVE_ACKNOWLEDGE Msg\n"); 
#endif
   return msg; 
}

static void parse_retrieve_reject (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
#if DEBUG 
   printf("Parsing RETRIEVE_REJECT Msg\n"); 
#endif

 
}

static msg_t *build_retrieve_reject (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RETRIEVE_REJECT_t *retrieve_reject;
   msg_t *msg =(msg_t*)create_l3msg(CC_RETRIEVE_REJECT | REQUEST, MT_RETRIEVE_REJECT,  bc?bc->l3_id:-1, sizeof(RETRIEVE_REJECT_t) ,nt); 
 
   retrieve_reject=(RETRIEVE_REJECT_t*)((msg->data+HEADER_LEN)); 

#if DEBUG 
   printf("Building RETRIEVE_REJECT Msg\n"); 
#endif
   return msg; 
}

static void parse_disconnect (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   DISCONNECT_t *disconnect=(DISCONNECT_t*)((unsigned long)(msg->data+HEADER_LEN));
   int location;
   int cause; 
   dec_ie_cause(disconnect->CAUSE, (Q931_info_t *)(disconnect), &location, &cause, nt,bc);
   if (cause>0) bc->cause=cause;

   dec_ie_progress(disconnect->PROGRESS, (Q931_info_t *)disconnect, &bc->progress_coding, &bc->progress_location, &bc->progress_indicator, nt, bc);
#if DEBUG 
   printf("Parsing DISCONNECT Msg\n"); 
#endif

 
}

static msg_t *build_disconnect (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   DISCONNECT_t *disconnect;
   msg_t *msg =(msg_t*)create_l3msg(CC_DISCONNECT | REQUEST, MT_DISCONNECT,  bc?bc->l3_id:-1, sizeof(DISCONNECT_t) ,nt); 
   
   disconnect=(DISCONNECT_t*)((msg->data+HEADER_LEN)); 
   
   enc_ie_cause(&disconnect->CAUSE, msg, (nt)?1:0, bc->out_cause,nt,bc);
   if (nt) enc_ie_progress(&disconnect->PROGRESS, msg, 0, nt?1:5, 8 ,nt,bc);

   if (bc->uulen) {
      int  protocol=4;
      enc_ie_useruser(&disconnect->USER_USER, msg, protocol, bc->uu, bc->uulen, nt,bc);
      cb_log(1,bc->port,"ENCODING USERUESRINFO:%s\n",bc->uu);
   }
  
#if DEBUG 
   printf("Building DISCONNECT Msg\n"); 
#endif
   return msg; 
}

static void parse_restart (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt) 
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RESTART_t *restart=(RESTART_t*)((unsigned long)(msg->data+HEADER_LEN));

   struct misdn_stack *stack=get_stack_by_bc(bc);
   
#if DEBUG 
   printf("Parsing RESTART Msg\n");
#endif
  
   {