forked from OpenSIPS/opensips
/
receive.c
224 lines (197 loc) · 6.18 KB
/
receive.c
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/*
*$Id$
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of opensips, a free SIP server.
*
* opensips 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
*
* opensips 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* History:
* ---------
* 2003-02-28 scratchpad compatibility abandoned (jiri)
* 2003-01-29 transport-independent message zero-termination in
* receive_msg (jiri)
* 2003-02-07 undoed jiri's zero term. changes (they break tcp) (andrei)
* 2003-02-10 moved zero-term in the calling functions (udp_receive &
* tcp_read_req)
* 2003-08-13 fixed exec_pre_cb returning 0 (backported from stable) (andrei)
* 2004-02-06 added user preferences support - destroy_avps() (bogdan)
* 2004-04-30 exec_pre_cb is called after basic sanity checks (at least one
* via present & parsed ok) (andrei)
* 2004-08-23 avp core changed - destroy_avp-> reset_avps (bogdan)
* 2005-07-26 default onreply route added (andrei)
* 2006-12-22 functions for script flags added (bogdan)
*/
/*!
* \file
* \brief Receive message and process routing for it
*/
#include <string.h>
#include <stdlib.h>
#include <sys/time.h>
#include "receive.h"
#include "globals.h"
#include "dprint.h"
#include "route.h"
#include "parser/msg_parser.h"
#include "forward.h"
#include "action.h"
#include "mem/mem.h"
#include "ip_addr.h"
#include "script_cb.h"
#include "dset.h"
#include "usr_avp.h"
#include "core_stats.h"
#include "tcp_server.h" /* for tcpconn_add_alias */
#ifdef DEBUG_DMALLOC
#include <mem/dmalloc.h>
#endif
static unsigned int msg_no=0;
/* address preset vars */
str default_global_address={0,0};
str default_global_port={0,0};
str default_via_address={0,0};
str default_via_port={0,0};
unsigned int get_next_msg_no(void)
{
return ++msg_no;
}
/*! \note WARNING: buf must be 0 terminated (buf[len]=0) or some things might
* break (e.g.: modules/textops)
*/
int receive_msg(char* buf, unsigned int len, struct receive_info* rcv_info)
{
struct sip_msg* msg;
msg=pkg_malloc(sizeof(struct sip_msg));
if (msg==0) {
LM_ERR("no pkg mem left for sip_msg\n");
goto error00;
}
msg_no++;
/* number of vias parsed -- good for diagnostic info in replies */
via_cnt=0;
memset(msg,0, sizeof(struct sip_msg)); /* init everything to 0 */
/* fill in msg */
msg->buf=buf;
msg->len=len;
/* zero termination (termination of orig message bellow not that
useful as most of the work is done with scratch-pad; -jiri */
/* buf[len]=0; */ /* WARNING: zero term removed! */
msg->rcv=*rcv_info;
msg->id=msg_no;
msg->set_global_address=default_global_address;
msg->set_global_port=default_global_port;
if (parse_msg(buf,len, msg)!=0){
LM_ERR("parse_msg failed\n");
goto error02;
}
LM_DBG("After parse_msg...\n");
/* ... clear branches from previous message */
clear_branches();
if (msg->first_line.type==SIP_REQUEST) {
update_stat( rcv_reqs, 1);
/* sanity checks */
if ((msg->via1==0) || (msg->via1->error!=PARSE_OK)){
/* no via, send back error ? */
LM_ERR("no via found in request\n");
update_stat( err_reqs, 1);
goto error02;
}
/* check if necessary to add receive?->moved to forward_req */
/* check for the alias stuff */
#ifdef USE_TCP
if (msg->via1->alias && tcp_accept_aliases &&
(((rcv_info->proto==PROTO_TCP) && !tcp_disable)
#ifdef USE_TLS
|| ((rcv_info->proto==PROTO_TLS) && !tls_disable)
#endif
)
){
if (tcpconn_add_alias(rcv_info->proto_reserved1, msg->via1->port,
rcv_info->proto)!=0){
LM_ERR("tcp alias failed\n");
/* continue */
}
}
#endif
LM_DBG("preparing to run routing scripts...\n");
/* set request route type --bogdan*/
set_route_type( REQUEST_ROUTE );
/* execute pre-script callbacks, if any;
* if some of the callbacks said not to continue with
* script processing, don't do so;
* if we are here basic sanity checks are already done
* (like presence of at least one via), so you can count
* on via1 being parsed in a pre-script callback --andrei
*/
if (exec_pre_req_cb(msg)==0 ) {
update_stat( drp_reqs, 1);
goto end; /* drop the message */
}
/* exec the routing script */
run_top_route(rlist[DEFAULT_RT], msg);
/* execute post request-script callbacks */
exec_post_req_cb(msg);
} else if (msg->first_line.type==SIP_REPLY) {
update_stat( rcv_rpls, 1);
/* sanity checks */
if ((msg->via1==0) || (msg->via1->error!=PARSE_OK)){
/* no via, send back error ? */
LM_ERR("no via found in reply\n");
update_stat( err_rpls, 1);
goto error02;
}
/* set reply route type --bogdan*/
set_route_type( ONREPLY_ROUTE );
/* execute pre-script callbacks, if any ;
* if some of the callbacks said not to continue with
* script processing, don't do so ;
* if we are here, basic sanity checks are already done
* (like presence of at least one via), so you can count
* on via1 being parsed in a pre-script callback --andrei
*/
if (exec_pre_rpl_cb(msg)==0 ) {
update_stat( drp_rpls, 1);
goto end; /* drop the reply */
}
/* exec the onreply routing script */
if ( onreply_rlist[DEFAULT_RT]!=0 &&
(run_top_route(onreply_rlist[DEFAULT_RT],msg)&ACT_FL_DROP)
&& msg->REPLY_STATUS<200 ) {
LM_DBG("dropping provisional reply %d\n", msg->REPLY_STATUS);
update_stat( drp_rpls, 1);
goto end; /* drop the message */
} else {
/* send the msg */
forward_reply(msg);
/* TODO - TX reply stat */
}
/* execute post reply-script callbacks */
exec_post_rpl_cb(msg);
}
end:
/* free possible loaded avps -bogdan */
reset_avps();
LM_DBG("cleaning up\n");
free_sip_msg(msg);
pkg_free(msg);
return 0;
error02:
free_sip_msg(msg);
pkg_free(msg);
error00:
return -1;
}