/*  The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)  Copyright (C) 2001,2002,2003  Aymeric MOIZARD jack@atosc.org    This library is free software; you can redistribute it and/or  modify it under the terms of the GNU Lesser General Public  License as published by the Free Software Foundation; either  version 2.1 of the License, or (at your option) any later version.    This library is distributed in the hope that it will be useful,  but WITHOUT ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  Lesser General Public License for more details.    You should have received a copy of the GNU Lesser General Public  License along with this library; if not, write to the Free Software  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*/#include <osip2/internal.h>#include <osip2/osip.h>#include "fsm.h"#include <osip2/osip_dialog.h>voidosip_dialog_set_state (osip_dialog_t * dialog, state_t state){  dialog->state = state;}intosip_dialog_update_route_set_as_uas (osip_dialog_t * dialog, osip_message_t * invite){  osip_contact_t *contact;  int i;  if (osip_list_eol (invite->contacts, 0))    {      OSIP_TRACE (osip_trace		  (__FILE__, __LINE__, OSIP_WARNING, NULL,		   "missing a contact in invite!\n"));    }  else    {      if (dialog->remote_contact_uri != NULL)	{	  osip_contact_free (dialog->remote_contact_uri);	}      dialog->remote_contact_uri = NULL;      contact = osip_list_get (invite->contacts, 0);      i = osip_contact_clone (contact, &(dialog->remote_contact_uri));      if (i != 0)	return -1;    }  return 0;}intosip_dialog_update_osip_cseq_as_uas (osip_dialog_t * dialog, osip_message_t * invite){  dialog->remote_cseq = osip_atoi (invite->cseq->number);  return 0;}intosip_dialog_update_route_set_as_uac (osip_dialog_t * dialog, osip_message_t * response){  /* only the remote target URI is updated here... */  osip_contact_t *contact;  int i;  if (osip_list_eol (response->contacts, 0))    { /* no contact header in response? */      OSIP_TRACE (osip_trace		  (__FILE__, __LINE__, OSIP_WARNING, NULL,		   "missing a contact in response!\n"));    }  else    {      /* I personally think it's a bad idea to keep the old	 value in case the new one is broken... */      if (dialog->remote_contact_uri != NULL)	{	  osip_contact_free (dialog->remote_contact_uri);	}      dialog->remote_contact_uri = NULL;      contact = osip_list_get (response->contacts, 0);      i = osip_contact_clone (contact, &(dialog->remote_contact_uri));      if (i != 0)	return -1;    }  if (dialog->state == DIALOG_EARLY && osip_list_size (dialog->route_set) == 0)    {				/* update the route set */      int pos = 0;      while (!osip_list_eol (response->record_routes, pos))	{	  osip_record_route_t *rr;	  osip_record_route_t *rr2;	  rr = (osip_record_route_t *) osip_list_get (response->record_routes, pos);	  i = osip_record_route_clone (rr, &rr2);	  if (i != 0)	    return -1;	  osip_list_add (dialog->route_set, rr2, -1);	  pos++;	}    }  if (MSG_IS_STATUS_2XX (response))    dialog->state = DIALOG_CONFIRMED;  return 0;}intosip_dialog_update_tag_as_uac (osip_dialog_t * dialog, osip_message_t * response){  osip_generic_param_t *tag;  int i;  i = osip_to_get_tag (response->to, &tag);  if (i != 0)    {      OSIP_TRACE (osip_trace		  (__FILE__, __LINE__, OSIP_WARNING, NULL,		   "Remote UA is not compliant: missing a tag in response!\n"));      dialog->remote_tag = NULL;    }  else    dialog->remote_tag = osip_strdup (tag->gvalue);  return 0;}intosip_dialog_match_as_uac (osip_dialog_t * dlg, osip_message_t * answer){  osip_generic_param_t *tag_param_local;  osip_generic_param_t *tag_param_remote;  char *tmp;  int i;  osip_call_id_to_str (answer->call_id, &tmp);  if (0 != strcmp (dlg->call_id, tmp))    {      osip_free (tmp);      return -1;    }  osip_free (tmp);  /* for INCOMING RESPONSE:     To: remote_uri;remote_tag     From: local_uri;local_tag           <- LOCAL TAG ALWAYS EXIST   */  i = osip_from_get_tag (answer->from, &tag_param_local);  if (i != 0)    return -1;  if (dlg->local_tag == NULL)    /* NOT POSSIBLE BECAUSE I MANAGE REMOTE_TAG AND I ALWAYS ADD IT! */    return -1;  if (0 != strcmp (tag_param_local->gvalue, dlg->local_tag))    return -1;  i = osip_to_get_tag (answer->to, &tag_param_remote);  if (i != 0 && dlg->remote_tag != NULL)	/* no tag in response but tag in dialog */    return -1;			/* impossible... */  if (i != 0 && dlg->remote_tag == NULL)	/* no tag in response AND no tag in dialog */    {      if (0 ==	  osip_from_compare ((osip_from_t *) dlg->local_uri, (osip_from_t *) answer->from)	  && 0 == osip_from_compare (dlg->remote_uri, answer->to))	return 0;      return -1;    }  /* we don't have to compare     remote_uri with from     && local_uri with to.    ----> we have both tag recognized, it's enough..   */  if (0 == strcmp (tag_param_remote->gvalue, dlg->remote_tag))    return 0;  return -1;}intosip_dialog_match_as_uas (osip_dialog_t * dlg, osip_message_t * request){  osip_generic_param_t *tag_param_remote;  int i;  char *tmp;  osip_call_id_to_str (request->call_id, &tmp);  if (0 != strcmp (dlg->call_id, tmp))    {      osip_free (tmp);      return -1;    }  osip_free (tmp);  /* for INCOMING REQUEST:     To: local_uri;local_tag           <- LOCAL TAG ALWAYS EXIST     From: remote_uri;remote_tag   */  if (dlg->local_tag == NULL)    /* NOT POSSIBLE BECAUSE I MANAGE REMOTE_TAG AND I ALWAYS ADD IT! */    return -1;  i = osip_from_get_tag (request->from, &tag_param_remote);  if (i != 0 && dlg->remote_tag != NULL)	/* no tag in request but tag in dialog */    return -1;			/* impossible... */  if (i != 0 && dlg->remote_tag == NULL)	/* no tag in request AND no tag in dialog */    {      if (0 ==	  osip_from_compare ((osip_from_t *) dlg->remote_uri, (osip_from_t *) request->from)	  && 0 == osip_from_compare (dlg->local_uri, request->to))	return 0;      return -1;    }  /* we don't have to compare     remote_uri with from     && local_uri with to.    ----> we have both tag recognized, it's enough..   */  if (0 == strcmp (tag_param_remote->gvalue, dlg->remote_tag))    return 0;  return -1;}intosip_dialog_init_as_uac (osip_dialog_t ** dialog, osip_message_t * response){  int i;  int pos;  osip_generic_param_t *tag;  *dialog = NULL;  i = osip_to_get_tag (response->to, &tag);  if (i != 0)    {      OSIP_TRACE (osip_trace		  (__FILE__, __LINE__, OSIP_WARNING, NULL,		   "Remote UA is not compliant: missing a tag in response!\n"));      return -1;    }  (*dialog) = (osip_dialog_t *) osip_malloc (sizeof (osip_dialog_t));  if (*dialog == NULL)    return -1;  (*dialog)->type = CALLER;  if (MSG_IS_STATUS_2XX (response))    (*dialog)->state = DIALOG_CONFIRMED;  else				/* 1XX */    (*dialog)->state = DIALOG_EARLY;  i = osip_call_id_to_str (response->call_id, &((*dialog)->call_id));  if (i != 0)    goto diau_error_0;  i = osip_from_get_tag (response->from, &tag);  if (i != 0)    goto diau_error_1;  (*dialog)->local_tag = osip_strdup (tag->gvalue);  i = osip_to_get_tag (response->to, &tag);  if (i != 0)    {      OSIP_TRACE (osip_trace		  (__FILE__, __LINE__, OSIP_WARNING, NULL,		   "Remote UA is not compliant: missing a tag in response!\n"));      (*dialog)->remote_tag = NULL;    }  else    (*dialog)->remote_tag = osip_strdup (tag->gvalue);  (*dialog)->route_set = (osip_list_t *) osip_malloc (sizeof (osip_list_t));  osip_list_init ((*dialog)->route_set);  pos = 0;  while (!osip_list_eol (response->record_routes, pos))    {      osip_record_route_t *rr;      osip_record_route_t *rr2;      rr = (osip_record_route_t *) osip_list_get (response->record_routes, pos);      i = osip_record_route_clone (rr, &rr2);      if (i != 0)	goto diau_error_2;      osip_list_add ((*dialog)->route_set, rr2, -1);      pos++;    }  (*dialog)->local_cseq = osip_atoi (response->cseq->number);  (*dialog)->remote_cseq = -1;  i = osip_to_clone (response->to, &((*dialog)->remote_uri));  if (i != 0)    goto diau_error_3;  i = osip_from_clone (response->from, &((*dialog)->local_uri));  if (i != 0)    goto diau_error_4;  {    osip_contact_t *contact;    if (!osip_list_eol (response->contacts, 0))      {	contact = osip_list_get (response->contacts, 0);	i = osip_contact_clone (contact, &((*dialog)->remote_contact_uri));	if (i != 0)	  goto diau_error_5;      }    else      {	(*dialog)->remote_contact_uri = NULL;	OSIP_TRACE (osip_trace		    (__FILE__, __LINE__, OSIP_WARNING, NULL,		     "Remote UA is not compliant: missing a contact in response!\n"));      }  }  (*dialog)->secure = -1;	/* non secure */  return 0;diau_error_5:  osip_from_free ((*dialog)->local_uri);diau_error_4:  osip_from_free ((*dialog)->remote_uri);diau_error_3:diau_error_2:  osip_list_special_free ((*dialog)->route_set,		     (void *(*)(void *)) &osip_record_route_free);  osip_free ((*dialog)->remote_tag);  osip_free ((*dialog)->local_tag);diau_error_1:  osip_free ((*dialog)->call_id);diau_error_0:  OSIP_TRACE (osip_trace	      (__FILE__, __LINE__, OSIP_ERROR, NULL,	       "Could not establish dialog!\n"));  osip_free (*dialog);  *dialog = NULL;  return -1;}#if 1 /* SIPIT13 */intosip_dialog_init_as_uac_with_remote_request (osip_dialog_t ** dialog, osip_message_t *next_request, int local_cseq){  int i;  osip_generic_param_t *tag;  *dialog = NULL;  i = osip_to_get_tag (next_request->from, &tag);  if (i != 0)    {      OSIP_TRACE (osip_trace		  (__FILE__, __LINE__, OSIP_WARNING, NULL,		   "Remote UA is not compliant: missing a tag in next request!\n"));      return -1;    }  (*dialog) = (osip_dialog_t *) osip_malloc (sizeof (osip_dialog_t));  if (*dialog == NULL)    return -1;  (*dialog)->type = CALLER;#if 0  (*dialog)->state = DIALOG_CONFIRMED;#endif  (*dialog)->state = DIALOG_EARLY;  i = osip_call_id_to_str (next_request->call_id, &((*dialog)->call_id));  if (i != 0)    goto diau_error_0;  i = osip_from_get_tag (next_request->to, &tag);  if (i != 0)    goto diau_error_1;  (*dialog)->local_tag = osip_strdup (tag->gvalue);  i = osip_to_get_tag (next_request->from, &tag);  if (i != 0)    {      OSIP_TRACE (osip_trace		  (__FILE__, __LINE__, OSIP_WARNING, NULL,		   "Remote UA is not compliant: missing a tag in next request!\n"));      (*dialog)->remote_tag = NULL;    }  else    (*dialog)->remote_tag = osip_strdup (tag->gvalue);  (*dialog)->route_set = (osip_list_t *) osip_malloc (sizeof (osip_list_t));  osip_list_init ((*dialog)->route_set);  (*dialog)->local_cseq = local_cseq; /* -1 osip_atoi (xxx->cseq->number); */  (*dialog)->remote_cseq = osip_atoi (next_request->cseq->number);  i = osip_to_clone (next_request->from, &((*dialog)->remote_uri));  if (i != 0)    goto diau_error_3;  i = osip_from_clone (next_request->to, &((*dialog)->local_uri));  if (i != 0)    goto diau_error_4;  (*dialog)->secure = -1;	/* non secure */  return 0;diau_error_4:  osip_from_free ((*dialog)->remote_uri);diau_error_3:  osip_free ((*dialog)->remote_tag);  osip_free ((*dialog)->local_tag);diau_error_1:  osip_free ((*dialog)->call_id);diau_error_0:  OSIP_TRACE (osip_trace	      (__FILE__, __LINE__, OSIP_ERROR, NULL,	       "Could not establish dialog!\n"));  osip_free (*dialog);  *dialog = NULL;  return -1;}#endifintosip_dialog_init_as_uas (osip_dialog_t ** dialog, osip_message_t * invite, osip_message_t * response){  int i;  int pos;  osip_generic_param_t *tag;  (*dialog) = (osip_dialog_t *) osip_malloc (sizeof (osip_dialog_t));  if (*dialog == NULL)    return -1;  (*dialog)->type = CALLEE;  if (MSG_IS_STATUS_2XX (response))    (*dialog)->state = DIALOG_CONFIRMED;  else				/* 1XX */    (*dialog)->state = DIALOG_EARLY;  i = osip_call_id_to_str (response->call_id, &((*dialog)->call_id));  if (i != 0)    goto diau_error_0;  i = osip_to_get_tag (response->to, &tag);  if (i != 0)    goto diau_error_1;  (*dialog)->local_tag = osip_strdup (tag->gvalue);  i = osip_from_get_tag (response->from, &tag);  if (i != 0)    {      OSIP_TRACE (osip_trace		  (__FILE__, __LINE__, OSIP_WARNING, NULL,		   "Remote UA is not compliant: missing a tag in response!\n"));      (*dialog)->remote_tag = NULL;    }  else    (*dialog)->remote_tag = osip_strdup (tag->gvalue);  (*dialog)->route_set = (osip_list_t *) osip_malloc (sizeof (osip_list_t));  osip_list_init ((*dialog)->route_set);  pos = 0;  while (!osip_list_eol (response->record_routes, pos))    {      osip_record_route_t *rr;      osip_record_route_t *rr2;      rr = (osip_record_route_t *) osip_list_get (response->record_routes, pos);      i = osip_record_route_clone (rr, &rr2);      if (i != 0)	goto diau_error_2;      osip_list_add ((*dialog)->route_set, rr2, -1);      pos++;    }  /* local_cseq is set to response->cseq->number for better     handling of bad UA */  (*dialog)->local_cseq = osip_atoi (response->cseq->number);  (*dialog)->remote_cseq = osip_atoi (response->cseq->number);  i = osip_from_clone (response->from, &((*dialog)->remote_uri));  if (i != 0)    goto diau_error_3;  i = osip_to_clone (response->to, &((*dialog)->local_uri));  if (i != 0)    goto diau_error_4;  {    osip_contact_t *contact;    if (!osip_list_eol (invite->contacts, 0))      {	contact = osip_list_get (invite->contacts, 0);	i = osip_contact_clone (contact, &((*dialog)->remote_contact_uri));	if (i != 0)	  goto diau_error_5;      }    else      {	(*dialog)->remote_contact_uri = NULL;	OSIP_TRACE (osip_trace		    (__FILE__, __LINE__, OSIP_WARNING, NULL,		     "Remote UA is not compliant: missing a contact in response!\n"));      }  }  (*dialog)->secure = -1;	/* non secure */  return 0;diau_error_5:  osip_from_free ((*dialog)->local_uri);diau_error_4:  osip_from_free ((*dialog)->remote_uri);diau_error_3:diau_error_2:  osip_list_special_free ((*dialog)->route_set,		     (void *(*)(void *)) &osip_record_route_free);  osip_free ((*dialog)->remote_tag);  osip_free ((*dialog)->local_tag);diau_error_1:  osip_free ((*dialog)->call_id);diau_error_0:  OSIP_TRACE (osip_trace	      (__FILE__, __LINE__, OSIP_ERROR, NULL,	       "Could not establish dialog!\n"));  osip_free (*dialog);  *dialog = NULL;  return -1;}voidosip_dialog_free (osip_dialog_t * dialog){  if (dialog == NULL)    return;  osip_contact_free (dialog->remote_contact_uri);  osip_from_free (dialog->local_uri);  osip_to_free (dialog->remote_uri);  osip_list_special_free (dialog->route_set,		     (void *(*)(void *)) &osip_record_route_free);  osip_free (dialog->remote_tag);  osip_free (dialog->local_tag);  osip_free (dialog->call_id);  osip_free (dialog);}