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sip_msg.c
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sip_msg.c
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/**************************************************************************
**
** sngrep - SIP Messages flow viewer
**
** Copyright (C) 2013-2018 Ivan Alonso (Kaian)
** Copyright (C) 2013-2018 Irontec SL. All rights reserved.
**
** This program 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 3 of the License, or
** (at your option) any later version.
**
** This program 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, see <http://www.gnu.org/licenses/>.
**
****************************************************************************/
/**
* @file sip_msg.c
* @author Ivan Alonso [aka Kaian] <kaian@irontec.com>
*
* @brief Functions to manage SIP call data
*
* This file contains the functions and structure to manage SIP message data
*
*/
#include "sip_msg.h"
#include "media.h"
#include "sip.h"
sip_msg_t *
msg_create()
{
sip_msg_t *msg;
if (!(msg = sng_malloc(sizeof(sip_msg_t))))
return NULL;
return msg;
}
void
msg_destroy(sip_msg_t *msg)
{
// Free message SDP media
if (!msg->retrans)
vector_destroy(msg->medias);
// Free message packets
packet_destroy(msg->packet);
// Free all memory
sng_free(msg->resp_str);
sng_free(msg->sip_from);
sng_free(msg->sip_to);
sng_free(msg);
}
void
msg_destroyer(void *msg)
{
msg_destroy((sip_msg_t *)msg);
}
struct sip_call *
msg_get_call(const sip_msg_t *msg) {
return msg->call;
}
int
msg_media_count(sip_msg_t *msg)
{
return vector_count(msg->medias);
}
int
msg_has_sdp(void *item)
{
return vector_count(((sip_msg_t *)item)->medias) ? 1 : 0;
}
int
msg_is_request(sip_msg_t *msg)
{
return msg->reqresp < 100;
}
void
msg_add_media(sip_msg_t *msg, sdp_media_t *media)
{
if (!msg->medias) {
// Create a vector to store sdp
msg->medias = vector_create(2, 2);
vector_set_destroyer(msg->medias, media_destroyer);
}
vector_append(msg->medias, media);
}
const char *
msg_get_payload(sip_msg_t *msg)
{
return (const char *) packet_payload(msg->packet);
}
struct timeval
msg_get_time(sip_msg_t *msg) {
struct timeval t = { };
frame_t *frame;
if (msg && (frame = vector_first(msg->packet->frames))) {
t.tv_sec = frame->header->ts.tv_sec;
t.tv_usec = frame->header->ts.tv_usec;
}
return t;
}
const char *
msg_get_attribute(sip_msg_t *msg, int id, char *value)
{
char *ar;
switch (id) {
case SIP_ATTR_SRC:
if (msg->packet->ip_version == 6) {
sprintf(value, "[%s]:%u", msg->packet->src.ip, msg->packet->src.port);
} else {
sprintf(value, "%s:%u", msg->packet->src.ip, msg->packet->src.port);
}
break;
case SIP_ATTR_DST:
if (msg->packet->ip_version == 6) {
sprintf(value, "[%s]:%u", msg->packet->dst.ip, msg->packet->dst.port);
} else {
sprintf(value, "%s:%u", msg->packet->dst.ip, msg->packet->dst.port);
}
break;
case SIP_ATTR_METHOD:
sprintf(value, "%.*s", SIP_ATTR_MAXLEN, sip_get_msg_reqresp_str(msg));
break;
case SIP_ATTR_SIPFROM:
sprintf(value, "%.*s", SIP_ATTR_MAXLEN, msg->sip_from);
break;
case SIP_ATTR_SIPTO:
sprintf(value, "%.*s", SIP_ATTR_MAXLEN, msg->sip_to);
break;
case SIP_ATTR_SIPFROMUSER:
if (msg->sip_from && (ar = strchr(msg->sip_from, '@'))) {
strncpy(value, msg->sip_from, ar - msg->sip_from);
value[ar - msg->sip_from] = '\0';
}
break;
case SIP_ATTR_SIPTOUSER:
if (msg->sip_to && (ar = strchr(msg->sip_to, '@'))) {
strncpy(value, msg->sip_to, ar - msg->sip_to);
value[ar - msg->sip_to] = '\0';
}
break;
case SIP_ATTR_DATE:
timeval_to_date(msg_get_time(msg), value);
break;
case SIP_ATTR_TIME:
timeval_to_time(msg_get_time(msg), value);
break;
default:
fprintf(stderr, "Unhandled attribute %s (%d)\n", sip_attr_get_name(id), id); abort();
break;
}
return strlen(value) ? value : NULL;
}
int
msg_is_older(sip_msg_t *one, sip_msg_t *two)
{
// Yes, you are older than nothing
if (!two)
return 1;
// No, you are not older than yourself
if (one == two)
return 0;
// Otherwise
return timeval_is_older(msg_get_time(one), msg_get_time(two));
}