isdn_msg_parser.c

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/*
 * Chan_Misdn -- Channel Driver for Asterisk
 *
 * Interface to mISDN
 *
 * Copyright (C) 2004, Christian Richter
 *
 * Christian Richter <[email protected]>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */

/*! \file
 * \brief Interface to mISDN - message parser
 * \author Christian Richter <[email protected]>
 */

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

#include "isdn_lib_intern.h"


#include "isdn_lib.h"

#include "ie.c"

/*!
 * \internal
 * \brief Build the name, number, name/number display message string
 *
 * \param display Display buffer to fill in
 * \param display_length Length of the display buffer to fill in
 * \param display_format Display format enumeration
 * \param name Name string to use
 * \param number Number string to use
 *
 * \return Nothing
 */
static void build_display_str(char *display, size_t display_length, int display_format, const char *name, const char *number)
{
   display[0] = 0;
   switch (display_format) {
   default:
   case 0:     /* none */
      break;

   case 1:     /* name */
      snprintf(display, display_length, "%s", name);
      break;

   case 2:     /* number */
      snprintf(display, display_length, "%s", number);
      break;

   case 3:     /* both */
      if (name[0] || number[0]) {
         snprintf(display, display_length, "\"%s\" <%s>", name, number);
      }
      break;
   }
}

/*!
 * \internal
 * \brief Encode the Facility IE and put it into the message structure.
 *
 * \param ntmode Where the encoded facility was put when in NT mode.
 * \param msg General message structure
 * \param fac Data to encode into the facility ie.
 * \param nt TRUE if in NT mode.
 *
 * \return Nothing
 */
static void enc_ie_facility(unsigned char **ntmode, msg_t *msg, struct FacParm *fac, int nt)
{
   int len;
   Q931_info_t *qi;
   unsigned char *p;
   unsigned char buf[256];

   len = encodeFac(buf, fac);
   if (len <= 0) {
      /*
       * mISDN does not know how to build the requested facility structure
       * Clear facility information
       */
      fac->Function = Fac_None;
      return;
   }

   p = msg_put(msg, len);
   if (nt) {
      *ntmode = p + 1;
   } else {
      qi = (Q931_info_t *) (msg->data + mISDN_HEADER_LEN);
      qi->QI_ELEMENT(facility) = p - (unsigned char *) qi - sizeof(Q931_info_t);
   }

   memcpy(p, buf, len);

   /* Clear facility information */
   fac->Function = Fac_None;
}

/*!
 * \internal
 * \brief Decode the Facility IE.
 *
 * \param p Encoded facility ie data to decode. (NT mode)
 * \param qi Encoded facility ie data to decode. (TE mode)
 * \param fac Where to put the decoded facility ie data if it is available.
 * \param nt TRUE if in NT mode.
 * \param bc Associated B channel
 *
 * \return Nothing
 */
static void dec_ie_facility(unsigned char *p, Q931_info_t *qi, struct FacParm *fac, int nt, struct misdn_bchannel *bc)
{
   fac->Function = Fac_None;

   if (!nt) {
      p = NULL;
      if (qi->QI_ELEMENT(facility)) {
         p = (unsigned char *) qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(facility) + 1;
      }
   }
   if (!p) {
      return;
   }

   if (decodeFac(p, fac)) {
      cb_log(3, bc->port, "Decoding facility ie failed! Unrecognized facility message?\n");
   }
}



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 *) (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);

   dec_ie_facility(proceeding->FACILITY, (Q931_info_t *) proceeding, &bc->fac_in, nt, bc);

   /* dec_ie_redir_dn */

#ifdef 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 (bc->fac_out.Function != Fac_None) {
      enc_ie_facility(&proceeding->FACILITY, msg, &bc->fac_out, nt);
   }

   /* enc_ie_redir_dn */

#ifdef 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 *) (msg->data + HEADER_LEN);
   //Q931_info_t *qi=(Q931_info_t*)(msg->data+HEADER_LEN);

   dec_ie_facility(alerting->FACILITY, (Q931_info_t *) alerting, &bc->fac_in, nt, bc);

   /* dec_ie_redir_dn */

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

#ifdef 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 (bc->fac_out.Function != Fac_None) {
      enc_ie_facility(&alerting->FACILITY, msg, &bc->fac_out, nt);
   }

   /* enc_ie_redir_dn */

#ifdef 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 *) (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);

   dec_ie_facility(progress->FACILITY, (Q931_info_t *) progress, &bc->fac_in, nt, bc);

#ifdef 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));

   enc_ie_progress(&progress->PROGRESS, msg, 0, nt ? 1 : 5, 8, nt, bc);

   if (bc->fac_out.Function != Fac_None) {
      enc_ie_facility(&progress->FACILITY, msg, &bc->fac_out, nt);
   }

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

#if defined(AST_MISDN_ENHANCEMENTS)
/*!
 * \internal
 * \brief Extract the SETUP message's BC, HLC, and LLC encoded ie contents.
 *
 * \param setup Indexed setup message contents
 * \param nt TRUE if in NT mode.
 * \param bc Associated B channel
 *
 * \return Nothing
 */
static void extract_setup_Bc_Hlc_Llc(SETUP_t *setup, int nt, struct misdn_bchannel *bc)
{
   __u8 *p;
   Q931_info_t *qi;

   qi = (Q931_info_t *) setup;

   /* Extract Bearer Capability */
   if (nt) {
      p = (__u8 *) setup->BEARER;
   } else {
      if (qi->QI_ELEMENT(bearer_capability)) {
         p = (__u8 *) qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(bearer_capability) + 1;
      } else {
         p = NULL;
      }
   }
   if (!p || *p == 0 || sizeof(bc->setup_bc_hlc_llc.Bc.Contents) < *p) {
      bc->setup_bc_hlc_llc.Bc.Length = 0;
   } else {
      bc->setup_bc_hlc_llc.Bc.Length = *p;
      memcpy(bc->setup_bc_hlc_llc.Bc.Contents, p + 1, *p);
   }

   /* Extract Low Layer Compatibility */
   if (nt) {
      p = (__u8 *) setup->LLC;
   } else {
      if (qi->QI_ELEMENT(llc)) {
         p = (__u8 *) qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(llc) + 1;
      } else {
         p = NULL;
      }
   }
   if (!p || *p == 0 || sizeof(bc->setup_bc_hlc_llc.Llc.Contents) < *p) {
      bc->setup_bc_hlc_llc.Llc.Length = 0;
   } else {
      bc->setup_bc_hlc_llc.Llc.Length = *p;
      memcpy(bc->setup_bc_hlc_llc.Llc.Contents, p + 1, *p);
   }

   /* Extract High Layer Compatibility */
   if (nt) {
      p = (__u8 *) setup->HLC;
   } else {
      if (qi->QI_ELEMENT(hlc)) {
         p = (__u8 *) qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(hlc) + 1;
      } else {
         p = NULL;
      }
   }
   if (!p || *p == 0 || sizeof(bc->setup_bc_hlc_llc.Hlc.Contents) < *p) {
      bc->setup_bc_hlc_llc.Hlc.Length = 0;
   } else {
      bc->setup_bc_hlc_llc.Hlc.Length = *p;
      memcpy(bc->setup_bc_hlc_llc.Hlc.Contents, p + 1, *p);
   }
}
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */

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 *) (msg->data + HEADER_LEN);
   Q931_info_t *qi = (Q931_info_t *) (msg->data + HEADER_LEN);
   int type;
   int plan;
   int present;
   int screen;
   int reason;

#ifdef DEBUG
   printf("Parsing SETUP Msg\n");
#endif

   dec_ie_calling_pn(setup->CALLING_PN, qi, &type, &plan, &present, &screen, bc->caller.number, sizeof(bc->caller.number), nt, bc);
   bc->caller.number_type = type;
   bc->caller.number_plan = plan;
   switch (present) {
   default:
   case 0:
      bc->caller.presentation = 0;  /* presentation allowed */
      break;
   case 1:
      bc->caller.presentation = 1;  /* presentation restricted */
      break;
   case 2:
      bc->caller.presentation = 2;  /* Number not available */
      break;
   }
   if (0 <= screen) {
      bc->caller.screening = screen;
   } else {
      bc->caller.screening = 0;  /* Unscreened */
   }

   dec_ie_facility(setup->FACILITY, (Q931_info_t *) setup, &bc->fac_in, nt, bc);

   dec_ie_called_pn(setup->CALLED_PN, (Q931_info_t *) setup, &type, &plan, bc->dialed.number, sizeof(bc->dialed.number), nt, bc);
   bc->dialed.number_type = type;
   bc->dialed.number_plan = plan;

   dec_ie_keypad(setup->KEYPAD, (Q931_info_t *) setup, bc->keypad, sizeof(bc->keypad), nt, bc);

   dec_ie_complete(setup->COMPLETE, (Q931_info_t *) setup, &bc->sending_complete, nt, bc);

   dec_ie_redir_nr(setup->REDIR_NR, (Q931_info_t *) setup, &type, &plan, &present, &screen, &reason, bc->redirecting.from.number, sizeof(bc->redirecting.from.number), nt, bc);
   bc->redirecting.from.number_type = type;
   bc->redirecting.from.number_plan = plan;
   switch (present) {
   default:
   case 0:
      bc->redirecting.from.presentation = 0; /* presentation allowed */
      break;
   case 1:
      bc->redirecting.from.presentation = 1; /* presentation restricted */
      break;
   case 2:
      bc->redirecting.from.presentation = 2; /* Number not available */
      break;
   }
   if (0 <= screen) {
      bc->redirecting.from.screening = screen;
   } else {
      bc->redirecting.from.screening = 0; /* Unscreened */
   }
   if (0 <= reason) {
      bc->redirecting.reason = reason;
   } else {
      bc->redirecting.reason = mISDN_REDIRECTING_REASON_UNKNOWN;
   }

   {
      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, "USERUSERINFO:%s\n", bc->uu);
      else
      cb_log(1, bc->port, "NO USERUSERINFO\n");
   }

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

#if defined(AST_MISDN_ENHANCEMENTS)
   extract_setup_Bc_Hlc_Llc(setup, nt, bc);
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */
}

#define ANY_CHANNEL 0xff /* IE attribute 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);
   int is_ptp;
   enum FacFunction fac_type;

   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);

   fac_type = bc->fac_out.Function;
   if (fac_type != Fac_None) {
      enc_ie_facility(&setup->FACILITY, msg, &bc->fac_out, nt);
   }

   enc_ie_calling_pn(&setup->CALLING_PN, msg, bc->caller.number_type, bc->caller.number_plan,
      bc->caller.presentation, bc->caller.screening, bc->caller.number, nt, bc);

   if (bc->dialed.number[0]) {
      enc_ie_called_pn(&setup->CALLED_PN, msg, bc->dialed.number_type, bc->dialed.number_plan, bc->dialed.number, nt, bc);
   }

   switch (bc->outgoing_colp) {
   case 0:/* pass */
   case 1:/* restricted */
      is_ptp = misdn_lib_is_ptp(bc->port);
      if (bc->redirecting.from.number[0]
         && ((!is_ptp && nt)
            || (is_ptp
#if defined(AST_MISDN_ENHANCEMENTS)
               /*
                * There is no need to send out this ie when we are also sending
                * a Fac_DivertingLegInformation2 as well.  The
                * Fac_DivertingLegInformation2 supercedes the information in
                * this ie.
                */
               && fac_type != Fac_DivertingLegInformation2
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */
         ))) {
#if 1
         /* ETSI and Q.952 do not define the screening field */
         enc_ie_redir_nr(&setup->REDIR_NR, msg, bc->redirecting.from.number_type,
            bc->redirecting.from.number_plan, bc->redirecting.from.presentation, 0,
            bc->redirecting.reason, bc->redirecting.from.number, nt, bc);
#else
         /* Q.931 defines the screening field */
         enc_ie_redir_nr(&setup->REDIR_NR, msg, bc->redirecting.from.number_type,
            bc->redirecting.from.number_plan, bc->redirecting.from.presentation,
            bc->redirecting.from.screening, bc->redirecting.reason,
            bc->redirecting.from.number, nt, bc);
#endif
      }
      break;
   default:
      break;
   }

   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);
   } else if (nt && bc->caller.presentation == 0) {
      char display[sizeof(bc->display)];

      /* Presentation is allowed */
      build_display_str(display, sizeof(display), bc->display_setup, bc->caller.name, bc->caller.number);
      if (display[0]) {
         enc_ie_display(&setup->DISPLAY, msg, display, nt, bc);
      }
   }

   {
      int coding = 0;
      int capability;
      int mode = 0;  /* 2 for packet! */
      int user;
      int 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 USERUSERINFO:%s\n", bc->uu);
   }

#if defined(AST_MISDN_ENHANCEMENTS)
   extract_setup_Bc_Hlc_Llc(setup, nt, bc);
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */

#ifdef 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 *) (msg->data + HEADER_LEN);
   int type;
   int plan;
   int pres;
   int screen;

   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, &type, &plan,
      &pres, &screen, bc->connected.number, sizeof(bc->connected.number), nt, bc);
   bc->connected.number_type = type;
   bc->connected.number_plan = plan;
   switch (pres) {
   default:
   case 0:
      bc->connected.presentation = 0;  /* presentation allowed */
      break;
   case 1:
      bc->connected.presentation = 1;  /* presentation restricted */
      break;
   case 2:
      bc->connected.presentation = 2;  /* Number not available */
      break;
   }
   if (0 <= screen) {
      bc->connected.screening = screen;
   } else {
      bc->connected.screening = 0;  /* Unscreened */
   }

   dec_ie_facility(connect->FACILITY, (Q931_info_t *) connect, &bc->fac_in, nt, bc);

   /*
      cb_log(1,bc->port,"CONNETED PN: %s cpn_dialplan:%d\n", connected_pn, type);
   */

#ifdef 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);
   }

   switch (bc->outgoing_colp) {
   case 0:/* pass */
   case 1:/* restricted */
      enc_ie_connected_pn(&connect->CONNECT_PN, msg, bc->connected.number_type,
         bc->connected.number_plan, bc->connected.presentation,
         bc->connected.screening, bc->connected.number, nt, bc);
      break;
   default:
      break;
   }

   if (nt && bc->connected.presentation == 0) {
      char display[sizeof(bc->display)];

      /* Presentation is allowed */
      build_display_str(display, sizeof(display), bc->display_connected, bc->connected.name, bc->connected.number);
      if (display[0]) {
         enc_ie_display(&connect->DISPLAY, msg, display, nt, bc);
      }
   }

   if (bc->fac_out.Function != Fac_None) {
      enc_ie_facility(&connect->FACILITY, msg, &bc->fac_out, nt);
   }

#ifdef 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 *) (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);

   dec_ie_facility(setup_acknowledge->FACILITY, (Q931_info_t *) setup_acknowledge, &bc->fac_in, nt, bc);

#ifdef 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 (bc->fac_out.Function != Fac_None) {
      enc_ie_facility(&setup_acknowledge->FACILITY, msg, &bc->fac_out, nt);
   }

#ifdef 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)
{
#ifdef 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);

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing USER_INFORMATION Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing SUSPEND_REJECT Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing RESUME_REJECT Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing HOLD Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing SUSPEND Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing RESUME Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing HOLD_ACKNOWLEDGE Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing SUSPEND_ACKNOWLEDGE Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing RESUME_ACKNOWLEDGE Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing HOLD_REJECT Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing RETRIEVE Msg\n");
#endif


}

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

#ifdef 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)
{
#ifdef 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);
#ifdef 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)
{
#ifdef DEBUG
   printf("Parsing RETRIEVE_REJECT Msg\n");
#endif


}

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

#ifdef 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 *) (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_facility(disconnect->FACILITY, (Q931_info_t *) disconnect, &bc->fac_in, nt, bc);

   dec_ie_progress(disconnect->PROGRESS, (Q931_info_t *)disconnect, &bc->progress_coding, &bc->progress_location, &bc->progress_indicator, nt, bc);
#ifdef 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->fac_out.Function != Fac_None) {
      enc_ie_facility(&disconnect->FACILITY, msg, &bc->fac_out, nt);
   }

   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 USERUSERINFO:%s\n", bc->uu);
   }

#ifdef 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 *) (msg->data + HEADER_LEN);

   struct misdn_stack *stack=get_stack_by_bc(bc);

#ifdef DEBUG
   printf("Parsing RESTART Msg\n");
#endif

   {
      int  exclusive;
      dec_ie_channel_id(restart->CHANNEL_ID, (Q931_info_t *)restart, &exclusive, &bc->restart_channel, nt,bc);
      cb_log(3, stack->port, "CC_RESTART Request on channel:%d on this port.\n", bc->restart_channel);
   }

}

static msg_t *build_restart (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RESTART_t *restart;
   msg_t *msg =(msg_t*)create_l3msg(CC_RESTART | REQUEST, MT_RESTART,  bc?bc->l3_id:-1, sizeof(RESTART_t) ,nt);

   restart=(RESTART_t*)((msg->data+HEADER_LEN));

#ifdef DEBUG
   printf("Building RESTART Msg\n");
#endif

   if (bc->channel > 0) {
      enc_ie_channel_id(&restart->CHANNEL_ID, msg, 1,bc->channel, nt,bc);
      enc_ie_restart_ind(&restart->RESTART_IND, msg, 0x80, nt, bc);
   } else {
      enc_ie_restart_ind(&restart->RESTART_IND, msg, 0x87, nt, bc);
   }

   cb_log(0,bc->port, "Restarting channel %d\n", bc->channel);
   return msg;
}

static void parse_release (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RELEASE_t *release = (RELEASE_t *) (msg->data + HEADER_LEN);
   int location;
   int cause;

   dec_ie_cause(release->CAUSE, (Q931_info_t *)(release), &location, &cause, nt,bc);
   if (cause>0) bc->cause=cause;

   dec_ie_facility(release->FACILITY, (Q931_info_t *) release, &bc->fac_in, nt, bc);

#ifdef DEBUG
   printf("Parsing RELEASE Msg\n");
#endif


}

static msg_t *build_release (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RELEASE_t *release;
   msg_t *msg =(msg_t*)create_l3msg(CC_RELEASE | REQUEST, MT_RELEASE,  bc?bc->l3_id:-1, sizeof(RELEASE_t) ,nt);

   release=(RELEASE_t*)((msg->data+HEADER_LEN));

   if (bc->out_cause>= 0)
      enc_ie_cause(&release->CAUSE, msg, nt?1:0, bc->out_cause, nt,bc);

   if (bc->fac_out.Function != Fac_None) {
      enc_ie_facility(&release->FACILITY, msg, &bc->fac_out, nt);
   }

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

#ifdef DEBUG
   printf("Building RELEASE Msg\n");
#endif
   return msg;
}

static void parse_release_complete (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RELEASE_COMPLETE_t *release_complete = (RELEASE_COMPLETE_t *) (msg->data + HEADER_LEN);
   int location;
   int cause;
   iframe_t *frm = (iframe_t*) msg->data;

   struct misdn_stack *stack=get_stack_by_bc(bc);
   mISDNuser_head_t *hh;
   hh=(mISDNuser_head_t*)msg->data;

   /*hh=(mISDN_head_t*)msg->data;
   mISDN_head_t *hh;*/

   if (nt) {
      if (hh->prim == (CC_RELEASE_COMPLETE|CONFIRM)) {
         cb_log(0, stack->port, "CC_RELEASE_COMPLETE|CONFIRM [NT] \n");
         return;
      }
   } else {
      if (frm->prim == (CC_RELEASE_COMPLETE|CONFIRM)) {
         cb_log(0, stack->port, "CC_RELEASE_COMPLETE|CONFIRM [TE] \n");
         return;
      }
   }
   dec_ie_cause(release_complete->CAUSE, (Q931_info_t *)(release_complete), &location, &cause, nt,bc);
   if (cause>0) bc->cause=cause;

   dec_ie_facility(release_complete->FACILITY, (Q931_info_t *) release_complete, &bc->fac_in, nt, bc);

#ifdef DEBUG
   printf("Parsing RELEASE_COMPLETE Msg\n");
#endif
}

static msg_t *build_release_complete (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   RELEASE_COMPLETE_t *release_complete;
   msg_t *msg =(msg_t*)create_l3msg(CC_RELEASE_COMPLETE | REQUEST, MT_RELEASE_COMPLETE,  bc?bc->l3_id:-1, sizeof(RELEASE_COMPLETE_t) ,nt);

   release_complete=(RELEASE_COMPLETE_t*)((msg->data+HEADER_LEN));

   enc_ie_cause(&release_complete->CAUSE, msg, nt?1:0, bc->out_cause, nt,bc);

   if (bc->fac_out.Function != Fac_None) {
      enc_ie_facility(&release_complete->FACILITY, msg, &bc->fac_out, nt);
   }

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

#ifdef DEBUG
   printf("Building RELEASE_COMPLETE Msg\n");
#endif
   return msg;
}

static void parse_facility (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt ? mISDNUSER_HEAD_SIZE : mISDN_HEADER_LEN;
   FACILITY_t *facility = (FACILITY_t*)(msg->data+HEADER_LEN);
   Q931_info_t *qi = (Q931_info_t*)(msg->data+HEADER_LEN);
   unsigned char *p = NULL;
#if defined(AST_MISDN_ENHANCEMENTS)
   int description_code;
   int type;
   int plan;
   int present;
   char number[sizeof(bc->redirecting.to.number)];
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */

#ifdef DEBUG
   printf("Parsing FACILITY Msg\n");
#endif

   bc->fac_in.Function = Fac_None;

   if (!bc->nt) {
      if (qi->QI_ELEMENT(facility))
         p = (unsigned char *)qi + sizeof(Q931_info_t) + qi->QI_ELEMENT(facility) + 1;
   } else {
      p = facility->FACILITY;
   }
   if (!p)
      return;

   if (decodeFac(p, &bc->fac_in)) {
      cb_log(3, bc->port, "Decoding facility ie failed! Unrecognized facility message?\n");
   }

#if defined(AST_MISDN_ENHANCEMENTS)
   dec_ie_notify(facility->NOTIFY, qi, &description_code, nt, bc);
   if (description_code < 0) {
      bc->notify_description_code = mISDN_NOTIFY_CODE_INVALID;
   } else {
      bc->notify_description_code = description_code;
   }

   dec_ie_redir_dn(facility->REDIR_DN, qi, &type, &plan, &present, number, sizeof(number), nt, bc);
   if (0 <= type) {
      bc->redirecting.to_changed = 1;

      bc->redirecting.to.number_type = type;
      bc->redirecting.to.number_plan = plan;
      switch (present) {
      default:
      case 0:
         bc->redirecting.to.presentation = 0;   /* presentation allowed */
         break;
      case 1:
         bc->redirecting.to.presentation = 1;   /* presentation restricted */
         break;
      case 2:
         bc->redirecting.to.presentation = 2;   /* Number not available */
         break;
      }
      bc->redirecting.to.screening = 0;   /* Unscreened */
      strcpy(bc->redirecting.to.number, number);
   }
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */
}

static msg_t *build_facility (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   int len;
   int HEADER_LEN;
   unsigned char *ie_fac;
   unsigned char fac_tmp[256];
   msg_t *msg;
   FACILITY_t *facility;
   Q931_info_t *qi;

#ifdef DEBUG
   printf("Building FACILITY Msg\n");
#endif

   len = encodeFac(fac_tmp, &(bc->fac_out));
   if (len <= 0) {
      /*
       * mISDN does not know how to build the requested facility structure
       * Clear facility information
       */
      bc->fac_out.Function = Fac_None;

#if defined(AST_MISDN_ENHANCEMENTS)
      /* Clear other one shot information. */
      bc->notify_description_code = mISDN_NOTIFY_CODE_INVALID;
      bc->redirecting.to_changed = 0;
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */
      return NULL;
   }

   msg = (msg_t *) create_l3msg(CC_FACILITY | REQUEST, MT_FACILITY, bc ? bc->l3_id : -1, sizeof(FACILITY_t), nt);
   HEADER_LEN = nt ? mISDNUSER_HEAD_SIZE : mISDN_HEADER_LEN;
   facility = (FACILITY_t *) (msg->data + HEADER_LEN);

   ie_fac = msg_put(msg, len);
   if (bc->nt) {
      facility->FACILITY = ie_fac + 1;
   } else {
      qi = (Q931_info_t *)(msg->data + mISDN_HEADER_LEN);
      qi->QI_ELEMENT(facility) = ie_fac - (unsigned char *)qi - sizeof(Q931_info_t);
   }

   memcpy(ie_fac, fac_tmp, len);

   /* Clear facility information */
   bc->fac_out.Function = Fac_None;

   if (*bc->display) {
#ifdef DEBUG
      printf("Sending %s as Display\n", bc->display);
#endif
      enc_ie_display(&facility->DISPLAY, msg, bc->display, nt,bc);
   }

#if defined(AST_MISDN_ENHANCEMENTS)
   if (bc->notify_description_code != mISDN_NOTIFY_CODE_INVALID) {
      enc_ie_notify(&facility->NOTIFY, msg, bc->notify_description_code, nt, bc);
      bc->notify_description_code = mISDN_NOTIFY_CODE_INVALID;
   }

   if (bc->redirecting.to_changed) {
      bc->redirecting.to_changed = 0;
      switch (bc->outgoing_colp) {
      case 0:/* pass */
      case 1:/* restricted */
         enc_ie_redir_dn(&facility->REDIR_DN, msg, bc->redirecting.to.number_type,
            bc->redirecting.to.number_plan, bc->redirecting.to.presentation,
            bc->redirecting.to.number, nt, bc);
         break;
      default:
         break;
      }
   }
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */

   return msg;
}

#if defined(AST_MISDN_ENHANCEMENTS)
/*!
 * \internal
 * \brief Parse a received REGISTER message
 *
 * \param msgs Search table entry that called us.
 * \param msg Received message contents
 * \param bc Associated B channel
 * \param nt TRUE if in NT mode.
 *
 * \return Nothing
 */
static void parse_register(struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN;
   REGISTER_t *reg;

   HEADER_LEN = nt ? mISDNUSER_HEAD_SIZE : mISDN_HEADER_LEN;
   reg = (REGISTER_t *) (msg->data + HEADER_LEN);

   /*
    * A facility ie is optional.
    * The peer may just be establishing a connection to send
    * messages later.
    */
   dec_ie_facility(reg->FACILITY, (Q931_info_t *) reg, &bc->fac_in, nt, bc);
}
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */

#if defined(AST_MISDN_ENHANCEMENTS)
/*!
 * \internal
 * \brief Construct a REGISTER message
 *
 * \param msgs Search table entry that called us.
 * \param bc Associated B channel
 * \param nt TRUE if in NT mode.
 *
 * \return Allocated built message
 */
static msg_t *build_register(struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN;
   REGISTER_t *reg;
   msg_t *msg;

   msg = (msg_t *) create_l3msg(CC_REGISTER | REQUEST, MT_REGISTER,  bc ? bc->l3_id : -1, sizeof(REGISTER_t), nt);
   HEADER_LEN = nt ? mISDNUSER_HEAD_SIZE : mISDN_HEADER_LEN;
   reg = (REGISTER_t *) (msg->data + HEADER_LEN);

   if (bc->fac_out.Function != Fac_None) {
      enc_ie_facility(&reg->FACILITY, msg, &bc->fac_out, nt);
   }

   return msg;
}
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */

static void parse_notify (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt ? mISDNUSER_HEAD_SIZE : mISDN_HEADER_LEN;
   NOTIFY_t *notify = (NOTIFY_t *) (msg->data + HEADER_LEN);
   int description_code;
   int type;
   int plan;
   int present;
   char number[sizeof(bc->redirecting.to.number)];

#ifdef DEBUG
   printf("Parsing NOTIFY Msg\n");
#endif

   dec_ie_notify(notify->NOTIFY, (Q931_info_t *) notify, &description_code, nt, bc);
   if (description_code < 0) {
      bc->notify_description_code = mISDN_NOTIFY_CODE_INVALID;
   } else {
      bc->notify_description_code = description_code;
   }

   dec_ie_redir_dn(notify->REDIR_DN, (Q931_info_t *) notify, &type, &plan, &present, number, sizeof(number), nt, bc);
   if (0 <= type) {
      bc->redirecting.to_changed = 1;

      bc->redirecting.to.number_type = type;
      bc->redirecting.to.number_plan = plan;
      switch (present) {
      default:
      case 0:
         bc->redirecting.to.presentation = 0;   /* presentation allowed */
         break;
      case 1:
         bc->redirecting.to.presentation = 1;   /* presentation restricted */
         break;
      case 2:
         bc->redirecting.to.presentation = 2;   /* Number not available */
         break;
      }
      bc->redirecting.to.screening = 0;   /* Unscreened */
      strcpy(bc->redirecting.to.number, number);
   }
}

static msg_t *build_notify (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   NOTIFY_t *notify;
   msg_t *msg =(msg_t*)create_l3msg(CC_NOTIFY | REQUEST, MT_NOTIFY,  bc?bc->l3_id:-1, sizeof(NOTIFY_t) ,nt);

#ifdef DEBUG
   printf("Building NOTIFY Msg\n");
#endif

   notify = (NOTIFY_t *) (msg->data + HEADER_LEN);

   enc_ie_notify(&notify->NOTIFY, msg, bc->notify_description_code, nt, bc);
   bc->notify_description_code = mISDN_NOTIFY_CODE_INVALID;

   if (bc->redirecting.to_changed) {
      bc->redirecting.to_changed = 0;
      switch (bc->outgoing_colp) {
      case 0:/* pass */
      case 1:/* restricted */
         enc_ie_redir_dn(&notify->REDIR_DN, msg, bc->redirecting.to.number_type,
            bc->redirecting.to.number_plan, bc->redirecting.to.presentation,
            bc->redirecting.to.number, nt, bc);
         break;
      default:
         break;
      }
   }
   return msg;
}

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

static msg_t *build_status_enquiry (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   msg_t *msg =(msg_t*)create_l3msg(CC_STATUS_ENQUIRY | REQUEST, MT_STATUS_ENQUIRY,  bc?bc->l3_id:-1, sizeof(STATUS_ENQUIRY_t) ,nt);

#ifdef DEBUG
   printf("Building STATUS_ENQUIRY Msg\n");
#endif
   return msg;
}

static void parse_information (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   INFORMATION_t *information = (INFORMATION_t *) (msg->data + HEADER_LEN);
   int type, plan;

   dec_ie_called_pn(information->CALLED_PN, (Q931_info_t *) information, &type, &plan, bc->info_dad, sizeof(bc->info_dad), nt, bc);
   dec_ie_keypad(information->KEYPAD, (Q931_info_t *) information, bc->keypad, sizeof(bc->keypad), nt, bc);

#ifdef DEBUG
   printf("Parsing INFORMATION Msg\n");
#endif
}

static msg_t *build_information (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   INFORMATION_t *information;
   msg_t *msg =(msg_t*)create_l3msg(CC_INFORMATION | REQUEST, MT_INFORMATION,  bc?bc->l3_id:-1, sizeof(INFORMATION_t) ,nt);

   information=(INFORMATION_t*)((msg->data+HEADER_LEN));

   enc_ie_called_pn(&information->CALLED_PN, msg, 0, 1, bc->info_dad, nt,bc);

   {
      if (*bc->display) {
#ifdef DEBUG
         printf("Sending %s as Display\n", bc->display);
#endif
         enc_ie_display(&information->DISPLAY, msg, bc->display, nt,bc);
      }
   }

#ifdef DEBUG
   printf("Building INFORMATION Msg\n");
#endif
   return msg;
}

static void parse_status (struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt)
{
   int HEADER_LEN = nt?mISDNUSER_HEAD_SIZE:mISDN_HEADER_LEN;
   STATUS_t *status = (STATUS_t *) (msg->data + HEADER_LEN);
   int location;
   int cause;

   dec_ie_cause(status->CAUSE, (Q931_info_t *)(status), &location, &cause, nt,bc);
   if (cause>0) bc->cause=cause;

#ifdef DEBUG
   printf("Parsing STATUS Msg\n");
#endif
}

static msg_t *build_status (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   msg_t *msg =(msg_t*)create_l3msg(CC_STATUS | REQUEST, MT_STATUS,  bc?bc->l3_id:-1, sizeof(STATUS_t) ,nt);

#ifdef DEBUG
   printf("Building STATUS Msg\n");
#endif
   return msg;
}

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

static msg_t *build_timeout (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
{
   msg_t *msg =(msg_t*)create_l3msg(CC_STATUS | REQUEST, MT_STATUS,  bc?bc->l3_id:-1, sizeof(STATUS_t) ,nt);

#ifdef DEBUG
   printf("Building STATUS Msg\n");
#endif
   return msg;
}


/************************************/




/** Msg Array **/

struct isdn_msg msgs_g[] = {
/* *INDENT-OFF* */
   /* misdn_msg,               event,                      msg_parser,                 msg_builder,                info */
   { CC_PROCEEDING,            EVENT_PROCEEDING,           parse_proceeding,           build_proceeding,           "PROCEEDING" },
   { CC_ALERTING,              EVENT_ALERTING,             parse_alerting,             build_alerting,             "ALERTING" },
   { CC_PROGRESS,              EVENT_PROGRESS,             parse_progress,             build_progress,             "PROGRESS" },
   { CC_SETUP,                 EVENT_SETUP,                parse_setup,                build_setup,                "SETUP" },
#if defined(AST_MISDN_ENHANCEMENTS)
   { CC_REGISTER,              EVENT_REGISTER,             parse_register,             build_register,             "REGISTER" },
#endif   /* defined(AST_MISDN_ENHANCEMENTS) */
   { CC_CONNECT,               EVENT_CONNECT,              parse_connect,              build_connect,              "CONNECT" },
   { CC_SETUP_ACKNOWLEDGE,     EVENT_SETUP_ACKNOWLEDGE,    parse_setup_acknowledge,    build_setup_acknowledge,    "SETUP_ACKNOWLEDGE" },
   { CC_CONNECT_ACKNOWLEDGE,   EVENT_CONNECT_ACKNOWLEDGE,  parse_connect_acknowledge,  build_connect_acknowledge,  "CONNECT_ACKNOWLEDGE " },
   { CC_USER_INFORMATION,      EVENT_USER_INFORMATION,     parse_user_information,     build_user_information,     "USER_INFORMATION" },
   { CC_SUSPEND_REJECT,        EVENT_SUSPEND_REJECT,       parse_suspend_reject,       build_suspend_reject,       "SUSPEND_REJECT" },
   { CC_RESUME_REJECT,         EVENT_RESUME_REJECT,        parse_resume_reject,        build_resume_reject,        "RESUME_REJECT" },
   { CC_HOLD,                  EVENT_HOLD,                 parse_hold,                 build_hold,                 "HOLD" },
   { CC_SUSPEND,               EVENT_SUSPEND,              parse_suspend,              build_suspend,              "SUSPEND" },
   { CC_RESUME,                EVENT_RESUME,               parse_resume,               build_resume,               "RESUME" },
   { CC_HOLD_ACKNOWLEDGE,      EVENT_HOLD_ACKNOWLEDGE,     parse_hold_acknowledge,     build_hold_acknowledge,     "HOLD_ACKNOWLEDGE" },
   { CC_SUSPEND_ACKNOWLEDGE,   EVENT_SUSPEND_ACKNOWLEDGE,  parse_suspend_acknowledge,  build_suspend_acknowledge,  "SUSPEND_ACKNOWLEDGE" },
   { CC_RESUME_ACKNOWLEDGE,    EVENT_RESUME_ACKNOWLEDGE,   parse_resume_acknowledge,   build_resume_acknowledge,   "RESUME_ACKNOWLEDGE" },
   { CC_HOLD_REJECT,           EVENT_HOLD_REJECT,          parse_hold_reject,          build_hold_reject,          "HOLD_REJECT" },
   { CC_RETRIEVE,              EVENT_RETRIEVE,             parse_retrieve,             build_retrieve,             "RETRIEVE" },
   { CC_RETRIEVE_ACKNOWLEDGE,  EVENT_RETRIEVE_ACKNOWLEDGE, parse_retrieve_acknowledge, build_retrieve_acknowledge, "RETRIEVE_ACKNOWLEDGE" },
   { CC_RETRIEVE_REJECT,       EVENT_RETRIEVE_REJECT,      parse_retrieve_reject,      build_retrieve_reject,      "RETRIEVE_REJECT" },
   { CC_DISCONNECT,            EVENT_DISCONNECT,           parse_disconnect,           build_disconnect,           "DISCONNECT" },
   { CC_RESTART,               EVENT_RESTART,              parse_restart,              build_restart,              "RESTART" },
   { CC_RELEASE,               EVENT_RELEASE,              parse_release,              build_release,              "RELEASE" },
   { CC_RELEASE_COMPLETE,      EVENT_RELEASE_COMPLETE,     parse_release_complete,     build_release_complete,     "RELEASE_COMPLETE" },
   { CC_FACILITY,              EVENT_FACILITY,             parse_facility,             build_facility,             "FACILITY" },
   { CC_NOTIFY,                EVENT_NOTIFY,               parse_notify,               build_notify,               "NOTIFY" },
   { CC_STATUS_ENQUIRY,        EVENT_STATUS_ENQUIRY,       parse_status_enquiry,       build_status_enquiry,       "STATUS_ENQUIRY" },
   { CC_INFORMATION,           EVENT_INFORMATION,          parse_information,          build_information,          "INFORMATION" },
   { CC_STATUS,                EVENT_STATUS,               parse_status,               build_status,               "STATUS" },
   { CC_TIMEOUT,               EVENT_TIMEOUT,              parse_timeout,              build_timeout,              "TIMEOUT" },
   { 0, 0, NULL, NULL, NULL }
/* *INDENT-ON* */
};

#define msgs_max (sizeof(msgs_g)/sizeof(struct isdn_msg))

/** INTERFACE FCTS ***/
int isdn_msg_get_index(struct isdn_msg msgs[], msg_t *msg, int nt)
{
   int i;

   if (nt){
      mISDNuser_head_t *hh = (mISDNuser_head_t*)msg->data;

      for (i=0; i< msgs_max -1; i++) {
         if ( (hh->prim&COMMAND_MASK)==(msgs[i].misdn_msg&COMMAND_MASK)) return i;
      }

   } else {
      iframe_t *frm = (iframe_t*)msg->data;

      for (i=0; i< msgs_max -1; i++)
         if ( (frm->prim&COMMAND_MASK)==(msgs[i].misdn_msg&COMMAND_MASK)) return i;
   }

   return -1;
}

int isdn_msg_get_index_by_event(struct isdn_msg msgs[], enum event_e event, int nt)
{
   int i;
   for (i=0; i< msgs_max; i++)
      if ( event == msgs[i].event) return i;

   cb_log(10,0, "get_index: event not found!\n");

   return -1;
}

enum event_e isdn_msg_get_event(struct isdn_msg msgs[], msg_t *msg, int nt)
{
   int i=isdn_msg_get_index(msgs, msg, nt);
   if(i>=0) return msgs[i].event;
   return EVENT_UNKNOWN;
}

char * isdn_msg_get_info(struct isdn_msg msgs[], msg_t *msg, int nt)
{
   int i=isdn_msg_get_index(msgs, msg, nt);
   if(i>=0) return msgs[i].info;
   return NULL;
}


char EVENT_CLEAN_INFO[] = "CLEAN_UP";
char EVENT_DTMF_TONE_INFO[] = "DTMF_TONE";
char EVENT_NEW_L3ID_INFO[] = "NEW_L3ID";
char EVENT_NEW_BC_INFO[] = "NEW_BC";
char EVENT_PORT_ALARM_INFO[] = "ALARM";
char EVENT_NEW_CHANNEL_INFO[] = "NEW_CHANNEL";
char EVENT_BCHAN_DATA_INFO[] = "BCHAN_DATA";
char EVENT_BCHAN_ACTIVATED_INFO[] = "BCHAN_ACTIVATED";
char EVENT_TONE_GENERATE_INFO[] = "TONE_GENERATE";
char EVENT_BCHAN_ERROR_INFO[] = "BCHAN_ERROR";

char * isdn_get_info(struct isdn_msg msgs[], enum event_e event, int nt)
{
   int i=isdn_msg_get_index_by_event(msgs, event, nt);

   if(i>=0) return msgs[i].info;

   if (event == EVENT_CLEANUP) return EVENT_CLEAN_INFO;
   if (event == EVENT_DTMF_TONE) return EVENT_DTMF_TONE_INFO;
   if (event == EVENT_NEW_L3ID) return EVENT_NEW_L3ID_INFO;
   if (event == EVENT_NEW_BC) return EVENT_NEW_BC_INFO;
   if (event == EVENT_NEW_CHANNEL) return EVENT_NEW_CHANNEL_INFO;
   if (event == EVENT_BCHAN_DATA) return EVENT_BCHAN_DATA_INFO;
   if (event == EVENT_BCHAN_ACTIVATED) return EVENT_BCHAN_ACTIVATED_INFO;
   if (event == EVENT_TONE_GENERATE) return EVENT_TONE_GENERATE_INFO;
   if (event == EVENT_PORT_ALARM) return EVENT_PORT_ALARM_INFO;
   if (event == EVENT_BCHAN_ERROR) return EVENT_BCHAN_ERROR_INFO;

   return NULL;
}

int isdn_msg_parse_event(struct isdn_msg msgs[], msg_t *msg, struct misdn_bchannel *bc, int nt)
{
   int i=isdn_msg_get_index(msgs, msg, nt);
   if(i<0) return -1;

   msgs[i].msg_parser(msgs, msg, bc, nt);
   return 0;
}

msg_t * isdn_msg_build_event(struct isdn_msg msgs[], struct misdn_bchannel *bc, enum event_e event, int nt)
{
   int i=isdn_msg_get_index_by_event(msgs, event, nt);
   if(i<0) return NULL;

   return  msgs[i].msg_builder(msgs, bc, nt);
}