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path.c
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path.c
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/*
* $Id$
*
* Helper functions for Path support.
*
* Copyright (C) 2006 Andreas Granig <agranig@linguin.org>
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio is free software; you can redistribute it and/or modify
* 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
*
* Kamailio 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/*!
* \file
* \brief SIP registrar module - Helper functions for Path support
* \ingroup registrar
*/
#include "../../core/data_lump.h"
#include "../../core/parser/parse_rr.h"
#include "../../core/parser/parse_uri.h"
#include "path.h"
#include "ims_registrar_scscf_mod.h"
/*! \brief
* Combines all Path HF bodies into one string.
*/
int build_path_vector(struct sip_msg *_m, str *path, str *received)
{
static char buf[MAX_PATH_BUFFER];
char *p;
struct hdr_field *hdr;
struct sip_uri puri;
rr_t *route = 0;
path->len = 0;
path->s = 0;
received->s = 0;
received->len = 0;
if(parse_headers(_m, HDR_EOH_F, 0) < 0) {
LM_ERR("failed to parse the message\n");
goto error;
}
for(hdr = _m->path, p = buf; hdr; hdr = next_sibling_hdr(hdr)) {
/* check for max. Path length */
if(p - buf + hdr->body.len + 1 >= MAX_PATH_BUFFER) {
LM_ERR("Overall Path body exceeds max. length of %d - trying to "
"add header [%.*s] and already have [%.*s]\n",
MAX_PATH_BUFFER, hdr->body.len, hdr->body.s, (int)(p - buf),
buf);
goto error;
}
if(p != buf)
*(p++) = ',';
memcpy(p, hdr->body.s, hdr->body.len);
p += hdr->body.len;
}
if(p != buf) {
/* check if next hop is a loose router */
if(parse_rr_body(buf, p - buf, &route) < 0) {
LM_ERR("failed to parse Path body, no head found\n");
goto error;
}
if(parse_uri(route->nameaddr.uri.s, route->nameaddr.uri.len, &puri)
< 0) {
LM_ERR("failed to parse the first Path URI\n");
goto error;
}
if(!puri.lr.s) {
LM_ERR("first Path URI is not a loose-router, not supported\n");
goto error;
}
if(path_use_params) {
param_hooks_t hooks;
param_t *params;
if(parse_params(&(puri.params), CLASS_CONTACT, &hooks, ¶ms)
!= 0) {
LM_ERR("failed to parse parameters of first hop\n");
goto error;
}
if(hooks.contact.received)
*received = hooks.contact.received->body;
/*for (;params; params = params->next) {
if (params->type == P_RECEIVED) {
*received = hooks.contact.received->body;
break;
}
}*/
free_params(params);
}
free_rr(&route);
}
path->s = buf;
path->len = p - buf;
return 0;
error:
if(route)
free_rr(&route);
return -1;
}