parser/parse_diversion.c
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 /*
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  * Copyright (C) 2001-2003 FhG Fokus
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  *
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  * This file is part of Kamailio, a free SIP server.
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  *
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  * Kamailio is free software; you can redistribute it and/or modify
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  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version
  *
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  * Kamailio is distributed in the hope that it will be useful,
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  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
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  * You should have received a copy of the GNU General Public License
  *
  * along with this program; if not, write to the Free Software
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  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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  */
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 /*! \file
  * \brief Parser :: Diversion header
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  *
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  * \ingroup parser
  */
 
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 #include <stdlib.h>
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 #include <string.h>
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 #include "../dprint.h"
 #include "../ut.h"
 #include "../mem/mem.h"
 #include "parse_from.h"
 #include "parse_to.h"
 #include "msg_parser.h"
 
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 /*! \brief
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  * This method is used to parse DIVERSION header.
  *
  * params: msg : sip msg
  * returns 0 on success,
  *        -1 on failure.
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  *
  * limitations: it parses only the first occurence
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  */
 int parse_diversion_header(struct sip_msg *msg)
 {
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 	struct to_body* diversion_b;
 
 	if (!msg->diversion && (parse_headers(msg, HDR_DIVERSION_F, 0) == -1)) {
 		goto error;
 	}
 
 	if (!msg->diversion) {
 		/* header not found */
 		return -1;
 	}
 
 	/* maybe the header is already parsed! */
 	if (msg->diversion->parsed)
 		return 0;
 
 	/* bad luck! :-( - we have to parse it */
 	/* first, get some memory */
 	diversion_b = pkg_malloc(sizeof(struct to_body));
 	if (diversion_b == 0) {
 		LM_ERR("out of pkg_memory\n");
 		goto error;
 	}
 
 	/* now parse it!! */
 	memset(diversion_b, 0, sizeof(struct to_body));
 	parse_addr_spec(msg->diversion->body.s,
 			msg->diversion->body.s + msg->diversion->body.len + 1,
 			diversion_b, 1);
 	if (diversion_b->error == PARSE_ERROR) {
 		LM_ERR("bad diversion header\n");
 		free_to(diversion_b);
 		goto error;
 	}
 	msg->diversion->parsed = diversion_b;
 
 	return 0;
 error:
 	return -1;
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 }
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 /*! \brief
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  * Get the value of a given diversion parameter
  */
 str *get_diversion_param(struct sip_msg *msg, str* name)
 {
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 	struct to_param *params;
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 	if (parse_diversion_header(msg) < 0) {
 		LM_ERR("could not get diversion parameter\n");
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 		return 0;
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 	}
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 	params =  ((struct to_body*)(msg->diversion->parsed))->param_lst;
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 	while (params) {
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 		if ((params->name.len == name->len) &&
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 				(strncmp(params->name.s, name->s, name->len) == 0)) {
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 			return &params->value;
 		}
 		params = params->next;
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 	}
 
 	return 0;
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 }