text: ﻿/*
    The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
    Copyright (C) 2001,2002,2003,2004,2005,2006,2007 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 <stdlib.h>
  #include <stdio.h>
  
  #include <osipparser2/osip_port.h>
  #include <osipparser2/osip_message.h>
  #include <osipparser2/osip_parser.h>
  
  int osip_cseq_init(osip_cseq_t ** cseq)
  {
  	*cseq = (osip_cseq_t *) osip_malloc(sizeof(osip_cseq_t));
  	if (*cseq == NULL)
  		return OSIP_NOMEM;
  	(*cseq)->method = NULL;
  	(*cseq)->number = NULL;
  	return OSIP_SUCCESS;
  }
  
  /* fills the cseq header of message.               */
  /* INPUT :  char *hvalue | value of header.   */
  /* OUTPUT: osip_message_t *sip | structure to save results. */
  /* returns -1 on error. */
  int osip_message_set_cseq(osip_message_t * sip, const char *hvalue)
  {
  	int i;
  
  	if (hvalue == NULL || hvalue[0] == '\0')
  		return OSIP_SUCCESS;
  
  	if (sip->cseq != NULL)
  		return OSIP_BADPARAMETER;
  	i = osip_cseq_init(&(sip->cseq));
  	if (i != 0)
  		return i;
  	sip->message_property = 2;
  	i = osip_cseq_parse(sip->cseq, hvalue);
  	if (i != 0) {
  		osip_cseq_free(sip->cseq);
  		sip->cseq = NULL;
  		return i;
  	}
  	return OSIP_SUCCESS;
  }
  
  /* fills the cseq strucuture.                      */
  /* INPUT : char *hvalue | value of header.         */
  /* OUTPUT: osip_message_t *sip | structure to save results. */
  /* returns -1 on error. */
  int osip_cseq_parse(osip_cseq_t * cseq, const char *hvalue)
  {
  	char *method = NULL;
  	const char *end = NULL;
  
  	if (cseq == NULL || hvalue == NULL)
  		return OSIP_BADPARAMETER;
  
  	cseq->number = NULL;
  	cseq->method = NULL;
  
  	method = strchr(hvalue, ' ');	/* SEARCH FOR SPACE */
  	if (method == NULL)
  		return OSIP_SYNTAXERROR;
  
  	end = hvalue + strlen(hvalue);
  
  	if (method - hvalue + 1 < 2)
  		return OSIP_SYNTAXERROR;
  	cseq->number = (char *) osip_malloc(method - hvalue + 1);
  	if (cseq->number == NULL)
  		return OSIP_NOMEM;
  	osip_clrncpy(cseq->number, hvalue, method - hvalue);
  
  	if (end - method + 1 < 2)
  		return OSIP_SYNTAXERROR;
  	cseq->method = (char *) osip_malloc(end - method + 1);
  	if (cseq->method == NULL)
  		return OSIP_NOMEM;
  	osip_clrncpy(cseq->method, method + 1, end - method);
  
  	return OSIP_SUCCESS;		/* ok */
  }
  
  #ifndef MINISIZE
  /* returns the cseq header.            */
  /* INPUT : osip_message_t *sip | sip message.   */
  /* returns null on error. */
  osip_cseq_t *osip_message_get_cseq(const osip_message_t * sip)
  {
  	return sip->cseq;
  }
  #endif
  
  char *osip_cseq_get_number(osip_cseq_t * cseq)
  {
  	return cseq->number;
  }
  
  char *osip_cseq_get_method(osip_cseq_t * cseq)
  {
  	return cseq->method;
  }
  
  void osip_cseq_set_number(osip_cseq_t * cseq, char *number)
  {
  	cseq->number = (char *) number;
  }
  
  void osip_cseq_set_method(osip_cseq_t * cseq, char *method)
  {
  	cseq->method = (char *) method;
  }
  
  /* returns the cseq header as a string.          */
  /* INPUT : osip_cseq_t *cseq | cseq header.  */
  /* returns null on error. */
  int osip_cseq_to_str(const osip_cseq_t * cseq, char **dest)
  {
  	size_t len;
  
  	*dest = NULL;
  	if ((cseq == NULL) || (cseq->number == NULL) || (cseq->method == NULL))
  		return OSIP_BADPARAMETER;
  	len = strlen(cseq->method) + strlen(cseq->number) + 2;
  	*dest = (char *) osip_malloc(len);
  	if (*dest == NULL)
  		return OSIP_NOMEM;
  	snprintf(*dest, len, "%s %s", cseq->number, cseq->method);
  	return OSIP_SUCCESS;
  }
  
  /* deallocates a osip_cseq_t structure.  */
  /* INPUT : osip_cseq_t *cseq | cseq. */
  void osip_cseq_free(osip_cseq_t * cseq)
  {
  	if (cseq == NULL)
  		return;
  	osip_free(cseq->method);
  	osip_free(cseq->number);
  	osip_free(cseq);
  }
  
  int osip_cseq_clone(const osip_cseq_t * cseq, osip_cseq_t ** dest)
  {
  	int i;
  	osip_cseq_t *cs;
  
  	*dest = NULL;
  	if (cseq == NULL)
  		return OSIP_BADPARAMETER;
  	if (cseq->method == NULL)
  		return OSIP_BADPARAMETER;
  	if (cseq->number == NULL)
  		return OSIP_BADPARAMETER;
  
  	i = osip_cseq_init(&cs);
  	if (i != 0) {
  		osip_cseq_free(cs);
  		return i;
  	}
  	cs->method = osip_strdup(cseq->method);
  	cs->number = osip_strdup(cseq->number);
  
  	*dest = cs;
  	return OSIP_SUCCESS;
  }
  
  int osip_cseq_match(osip_cseq_t * cseq1, osip_cseq_t * cseq2)
  {
  	if (cseq1 == NULL || cseq2 == NULL)
  		return OSIP_BADPARAMETER;
  	if (cseq1->number == NULL || cseq2->number == NULL
  		|| cseq1->method == NULL || cseq2->method == NULL)
  		return OSIP_BADPARAMETER;
  
  	if (0 == strcmp(cseq1->number, cseq2->number)) {
  		if (0 == strcmp(cseq2->method, "INVITE")
  			|| 0 == strcmp(cseq2->method, "ACK")) {
  			if (0 == strcmp(cseq1->method, "INVITE") ||
  				0 == strcmp(cseq1->method, "ACK"))
  				return OSIP_SUCCESS;
  		} else {
  			if (0 == strcmp(cseq1->method, cseq2->method))
  				return OSIP_SUCCESS;
  		}
  	}
  	return OSIP_UNDEFINED_ERROR;
  }
  