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kamailio/modules/rtpproxy-ng/rtpproxy.c

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/* $Id$
*
* Copyright (C) 2003-2008 Sippy Software, Inc., http://www.sippysoft.com
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* History:
* ---------
* 2003-10-09 nat_uac_test introduced (jiri)
*
* 2003-11-06 nat_uac_test permitted from onreply_route (jiri)
*
* 2003-12-01 unforce_rtp_proxy introduced (sobomax)
*
* 2004-01-07 RTP proxy support updated to support new version of the
* RTP proxy (20040107).
*
* force_rtp_proxy() now inserts a special flag
* into the SDP body to indicate that this session already
* proxied and ignores sessions with such flag.
*
* Added run-time check for version of command protocol
* supported by the RTP proxy.
*
* 2004-01-16 Integrated slightly modified patch from Tristan Colgate,
* force_rtp_proxy function with IP as a parameter (janakj)
*
* 2004-01-28 nat_uac_test extended to allow testing SDP body (sobomax)
*
* nat_uac_test extended to allow testing top Via (sobomax)
*
* 2004-02-21 force_rtp_proxy now accepts option argument, which
* consists of string of chars, each of them turns "on"
* some feature, currently supported ones are:
*
* `a' - flags that UA from which message is received
* doesn't support symmetric RTP;
* `l' - force "lookup", that is, only rewrite SDP when
* corresponding session is already exists in the
* RTP proxy. Only makes sense for SIP requests,
* replies are always processed in "lookup" mode;
* `i' - flags that message is received from UA in the
* LAN. Only makes sense when RTP proxy is running
* in the bridge mode.
*
* force_rtp_proxy can now be invoked without any arguments,
* as previously, with one argument - in this case argument
* is treated as option string and with two arguments, in
* which case 1st argument is option string and the 2nd
* one is IP address which have to be inserted into
* SDP (IP address on which RTP proxy listens).
*
* 2004-03-12 Added support for IPv6 addresses in SDPs. Particularly,
* force_rtp_proxy now can work with IPv6-aware RTP proxy,
* replacing IPv4 address in SDP with IPv6 one and vice versa.
* This allows creating full-fledged IPv4<->IPv6 gateway.
* See 4to6.cfg file for example.
*
* Two new options added into force_rtp_proxy:
*
* `f' - instructs nathelper to ignore marks inserted
* by another nathelper in transit to indicate
* that the session is already goes through another
* proxy. Allows creating chain of proxies.
* `r' - flags that IP address in SDP should be trusted.
* Without this flag, nathelper ignores address in the
* SDP and uses source address of the SIP message
* as media address which is passed to the RTP proxy.
*
* Protocol between nathelper and RTP proxy in bridge
* mode has been slightly changed. Now RTP proxy expects SER
* to provide 2 flags when creating or updating session
* to indicate direction of this session. Each of those
* flags can be either `e' or `i'. For example `ei' means
* that we received INVITE from UA on the "external" network
* network and will send it to the UA on "internal" one.
* Also possible `ie' (internal->external), `ii'
* (internal->internal) and `ee' (external->external). See
* example file alg.cfg for details.
*
* 2004-03-15 If the rtp proxy test failed (wrong version or not started)
* retry test from time to time, when some *rtpproxy* function
* is invoked. Minimum interval between retries can be
* configured via rtpproxy_disable_tout module parameter (default
* is 60 seconds). Setting it to -1 will disable periodic
* rechecks completely, setting it to 0 will force checks
* for each *rtpproxy* function call. (andrei)
*
* 2004-03-22 Fix assignment of rtpproxy_retr and rtpproxy_tout module
* parameters.
*
* 2004-03-22 Fix get_body position (should be called before get_callid)
* (andrei)
*
* 2004-03-24 Fix newport for null ip address case (e.g onhold re-INVITE)
* (andrei)
*
* 2004-09-30 added received port != via port test (andrei)
*
* 2004-10-10 force_socket option introduced (jiri)
*
* 2005-02-24 Added support for using more than one rtp proxy, in which
* case traffic will be distributed evenly among them. In addition,
* each such proxy can be assigned a weight, which will specify
* which share of the traffic should be placed to this particular
* proxy.
*
* Introduce failover mechanism, so that if SER detects that one
* of many proxies is no longer available it temporarily decreases
* its weight to 0, so that no traffic will be assigned to it.
* Such "disabled" proxies are periodically checked to see if they
* are back to normal in which case respective weight is restored
* resulting in traffic being sent to that proxy again.
*
* Those features can be enabled by specifying more than one "URI"
* in the rtpproxy_sock parameter, optionally followed by the weight,
* which if absent is assumed to be 1, for example:
*
* rtpproxy_sock="unix:/foo/bar=4 udp:1.2.3.4:3456=3 udp:5.6.7.8:5432=1"
*
* 2005-02-25 Force for pinging the socket returned by USRLOC (bogdan)
*
* 2005-03-22 support for multiple media streams added (netch)
*
* 2005-07-11 SIP ping support added (bogdan)
*
* 2005-07-14 SDP origin (o=) IP may be also changed (bogdan)
*
* 2006-03-08 fix_nated_sdp() may take one more param to force a specific IP;
* force_rtp_proxy() accepts a new flag 's' to swap creation/
* confirmation between requests/replies;
* add_rcv_param() may take as parameter a flag telling if the
* parameter should go to the contact URI or contact header;
* (bogdan)
* 2006-03-28 Support for changing session-level SDP connection (c=) IP when
* media-description also includes connection information (bayan)
* 2007-04-13 Support multiple sets of rtpproxies and set selection added
* (ancuta)
* 2007-04-26 Added some MI commands:
* nh_enable_ping used to enable or disable natping
* nh_enable_rtpp used to enable or disable a specific rtp proxy
* nh_show_rtpp used to display information for all rtp proxies
* (ancuta)
* 2007-05-09 New function start_recording() allowing to start recording RTP
* session in the RTP proxy (Carsten Bock - ported from SER)
* 2007-09-11 Separate timer process and support for multiple timer processes
* (bogdan)
* 2008-12-12 Support for RTCP attribute in the SDP
* (Min Wang/BASIS AudioNet - ported from SER)
* 2010-08-05 Core SDP parser integrated into nathelper (osas)
* 2010-10-08 Removal of deprecated force_rtp_proxy and swap flag (osas)
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#ifndef __USE_BSD
#define __USE_BSD
#endif
#include <netinet/ip.h>
#ifndef __FAVOR_BSD
#define __FAVOR_BSD
#endif
#include <netinet/udp.h>
#include <arpa/inet.h>
#include <sys/uio.h>
#include <sys/un.h>
#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../../flags.h"
#include "../../sr_module.h"
#include "../../dprint.h"
#include "../../data_lump.h"
#include "../../data_lump_rpl.h"
#include "../../error.h"
#include "../../forward.h"
#include "../../mem/mem.h"
#include "../../parser/parse_from.h"
#include "../../parser/parse_to.h"
#include "../../parser/parse_uri.h"
#include "../../parser/parser_f.h"
#include "../../parser/sdp/sdp.h"
#include "../../resolve.h"
#include "../../timer.h"
#include "../../trim.h"
#include "../../ut.h"
#include "../../pt.h"
#include "../../timer_proc.h"
#include "../../lib/kmi/mi.h"
#include "../../pvar.h"
#include "../../lvalue.h"
#include "../../msg_translator.h"
#include "../../usr_avp.h"
#include "../../socket_info.h"
#include "../../mod_fix.h"
#include "../../dset.h"
#include "../../route.h"
#include "../../modules/tm/tm_load.h"
#include "rtpproxy.h"
#include "rtpproxy_funcs.h"
#include "bencode.h"
#include "bencode_glue.h"
MODULE_VERSION
#if !defined(AF_LOCAL)
#define AF_LOCAL AF_UNIX
#endif
#if !defined(PF_LOCAL)
#define PF_LOCAL PF_UNIX
#endif
/* NAT UAC test constants */
#define NAT_UAC_TEST_C_1918 0x01
#define NAT_UAC_TEST_RCVD 0x02
#define NAT_UAC_TEST_V_1918 0x04
#define NAT_UAC_TEST_S_1918 0x08
#define NAT_UAC_TEST_RPORT 0x10
#define DEFAULT_RTPP_SET_ID 0
#define MI_SET_NATPING_STATE "nh_enable_ping"
#define MI_DEFAULT_NATPING_STATE 1
#define MI_ENABLE_RTP_PROXY "nh_enable_rtpp"
#define MI_MIN_RECHECK_TICKS 0
#define MI_MAX_RECHECK_TICKS (unsigned int)-1
#define MI_SHOW_RTP_PROXIES "nh_show_rtpp"
#define MI_RTP_PROXY_NOT_FOUND "RTP proxy not found"
#define MI_RTP_PROXY_NOT_FOUND_LEN (sizeof(MI_RTP_PROXY_NOT_FOUND)-1)
#define MI_PING_DISABLED "NATping disabled from script"
#define MI_PING_DISABLED_LEN (sizeof(MI_PING_DISABLED)-1)
#define MI_SET "set"
#define MI_SET_LEN (sizeof(MI_SET)-1)
#define MI_INDEX "index"
#define MI_INDEX_LEN (sizeof(MI_INDEX)-1)
#define MI_DISABLED "disabled"
#define MI_DISABLED_LEN (sizeof(MI_DISABLED)-1)
#define MI_WEIGHT "weight"
#define MI_WEIGHT_LEN (sizeof(MI_WEIGHT)-1)
#define MI_RECHECK_TICKS "recheck_ticks"
#define MI_RECHECK_T_LEN (sizeof(MI_RECHECK_TICKS)-1)
/* Supported version of the RTP proxy command protocol */
#define SUP_CPROTOVER 20040107
/* Required additional version of the RTP proxy command protocol */
#define REQ_CPROTOVER "20050322"
/* Additional version necessary for re-packetization support */
#define REP_CPROTOVER "20071116"
#define PTL_CPROTOVER "20081102"
#define CPORT "22222"
struct rtpproxy_flags {
bencode_item_t *dictionary, *flags, *direction;
int flookup, via;
};
static char *gencookie();
static int rtpp_test(struct rtpp_node*, int, int);
static int unforce_rtp_proxy0_f(struct sip_msg *, char *, char *);
static int unforce_rtp_proxy1_f(struct sip_msg *, char *, char *);
static int force_rtp_proxy(struct sip_msg *, char *, char *, int, int);
static int start_recording_f(struct sip_msg *, char *, char *);
static int rtpproxy_answer1_f(struct sip_msg *, char *, char *);
static int rtpproxy_answer2_f(struct sip_msg *, char *, char *);
static int rtpproxy_offer1_f(struct sip_msg *, char *, char *);
static int rtpproxy_offer2_f(struct sip_msg *, char *, char *);
static int rtpproxy_manage0(struct sip_msg *msg, char *flags, char *ip);
static int rtpproxy_manage1(struct sip_msg *msg, char *flags, char *ip);
static int rtpproxy_manage2(struct sip_msg *msg, char *flags, char *ip);
static int add_rtpproxy_socks(struct rtpp_set * rtpp_list, char * rtpproxy);
static int fixup_set_id(void ** param, int param_no);
static int set_rtp_proxy_set_f(struct sip_msg * msg, char * str1, char * str2);
static struct rtpp_set * select_rtpp_set(int id_set);
static int rtpproxy_set_store(modparam_t type, void * val);
static int rtpproxy_add_rtpproxy_set( char * rtp_proxies);
static int mod_init(void);
static int child_init(int);
static void mod_destroy(void);
/* Pseudo-Variables */
static int pv_get_rtpstat_f(struct sip_msg *, pv_param_t *, pv_value_t *);
/*mi commands*/
static struct mi_root* mi_enable_rtp_proxy(struct mi_root* cmd_tree,
void* param );
static struct mi_root* mi_show_rtpproxies(struct mi_root* cmd_tree,
void* param);
static int rtpproxy_disable_tout = 60;
static int rtpproxy_retr = 5;
static int rtpproxy_tout = 1;
static pid_t mypid;
static unsigned int myseqn = 0;
static char ** rtpp_strings=0;
static int rtpp_sets=0; /*used in rtpproxy_set_store()*/
static int rtpp_set_count = 0;
static unsigned int current_msg_id = (unsigned int)-1;
/* RTP proxy balancing list */
struct rtpp_set_head * rtpp_set_list =0;
struct rtpp_set * selected_rtpp_set =0;
struct rtpp_set * default_rtpp_set=0;
/* array with the sockets used by rtpporxy (per process)*/
static unsigned int rtpp_no = 0;
static int *rtpp_socks = 0;
/* tm */
static struct tm_binds tmb;
/*0-> disabled, 1 ->enabled*/
unsigned int *natping_state=0;
static str timeout_socket_str = {0, 0};
static cmd_export_t cmds[] = {
{"set_rtp_proxy_set", (cmd_function)set_rtp_proxy_set_f, 1,
fixup_set_id, 0,
ANY_ROUTE},
{"unforce_rtp_proxy", (cmd_function)unforce_rtp_proxy0_f, 0,
0, 0,
ANY_ROUTE},
{"unforce_rtp_proxy", (cmd_function)unforce_rtp_proxy1_f, 1,
0, 0,
ANY_ROUTE},
{"rtpproxy_destroy", (cmd_function)unforce_rtp_proxy0_f, 0,
0, 0,
ANY_ROUTE},
{"rtpproxy_destroy", (cmd_function)unforce_rtp_proxy1_f, 1,
0, 0,
ANY_ROUTE},
{"start_recording", (cmd_function)start_recording_f, 0,
0, 0,
ANY_ROUTE },
{"rtpproxy_offer", (cmd_function)rtpproxy_offer1_f, 0,
0, 0,
ANY_ROUTE},
{"rtpproxy_offer", (cmd_function)rtpproxy_offer1_f, 1,
0, 0,
ANY_ROUTE},
{"rtpproxy_offer", (cmd_function)rtpproxy_offer2_f, 2,
0, 0,
ANY_ROUTE},
{"rtpproxy_answer", (cmd_function)rtpproxy_answer1_f, 0,
0, 0,
ANY_ROUTE},
{"rtpproxy_answer", (cmd_function)rtpproxy_answer1_f, 1,
0, 0,
ANY_ROUTE},
{"rtpproxy_answer", (cmd_function)rtpproxy_answer2_f, 2,
0, 0,
ANY_ROUTE},
#if 0
{"rtpproxy_stream2uac",(cmd_function)rtpproxy_stream2uac2_f, 2,
fixup_var_str_int, 0,
ANY_ROUTE },
{"rtpproxy_stream2uas",(cmd_function)rtpproxy_stream2uas2_f, 2,
fixup_var_str_int, 0,
ANY_ROUTE },
{"rtpproxy_stop_stream2uac",(cmd_function)rtpproxy_stop_stream2uac2_f,0,
NULL, 0,
ANY_ROUTE },
{"rtpproxy_stop_stream2uas",(cmd_function)rtpproxy_stop_stream2uas2_f,0,
NULL, 0,
ANY_ROUTE },
#endif
{"rtpproxy_manage", (cmd_function)rtpproxy_manage0, 0,
0, 0,
ANY_ROUTE},
{"rtpproxy_manage", (cmd_function)rtpproxy_manage1, 1,
0, 0,
ANY_ROUTE},
{"rtpproxy_manage", (cmd_function)rtpproxy_manage2, 2,
0, 0,
ANY_ROUTE},
{0, 0, 0, 0, 0, 0}
};
static pv_export_t mod_pvs[] = {
{{"rtpstat", (sizeof("rtpstat")-1)}, /* RTP-Statistics */
PVT_OTHER, pv_get_rtpstat_f, 0, 0, 0, 0, 0},
{{0, 0}, 0, 0, 0, 0, 0, 0, 0}
};
static param_export_t params[] = {
{"rtpproxy_sock", STR_PARAM|USE_FUNC_PARAM,
(void*)rtpproxy_set_store },
{"rtpproxy_disable_tout", INT_PARAM, &rtpproxy_disable_tout },
{"rtpproxy_retr", INT_PARAM, &rtpproxy_retr },
{"rtpproxy_tout", INT_PARAM, &rtpproxy_tout },
{"timeout_socket", STR_PARAM, &timeout_socket_str.s },
{0, 0, 0}
};
static mi_export_t mi_cmds[] = {
{MI_ENABLE_RTP_PROXY, mi_enable_rtp_proxy, 0, 0, 0},
{MI_SHOW_RTP_PROXIES, mi_show_rtpproxies, MI_NO_INPUT_FLAG, 0, 0},
{ 0, 0, 0, 0, 0}
};
struct module_exports exports = {
"rtpproxy",
DEFAULT_DLFLAGS, /* dlopen flags */
cmds,
params,
0, /* exported statistics */
mi_cmds, /* exported MI functions */
mod_pvs, /* exported pseudo-variables */
0, /* extra processes */
mod_init,
0, /* reply processing */
mod_destroy, /* destroy function */
child_init
};
static int rtpproxy_set_store(modparam_t type, void * val){
char * p;
int len;
p = (char* )val;
if(p==0 || *p=='\0'){
return 0;
}
if(rtpp_sets==0){
rtpp_strings = (char**)pkg_malloc(sizeof(char*));
if(!rtpp_strings){
LM_ERR("no pkg memory left\n");
return -1;
}
} else {/*realloc to make room for the current set*/
rtpp_strings = (char**)pkg_realloc(rtpp_strings,
(rtpp_sets+1)* sizeof(char*));
if(!rtpp_strings){
LM_ERR("no pkg memory left\n");
return -1;
}
}
/*allocate for the current set of urls*/
len = strlen(p);
rtpp_strings[rtpp_sets] = (char*)pkg_malloc((len+1)*sizeof(char));
if(!rtpp_strings[rtpp_sets]){
LM_ERR("no pkg memory left\n");
return -1;
}
memcpy(rtpp_strings[rtpp_sets], p, len);
rtpp_strings[rtpp_sets][len] = '\0';
rtpp_sets++;
return 0;
}
static int add_rtpproxy_socks(struct rtpp_set * rtpp_list,
char * rtpproxy){
/* Make rtp proxies list. */
char *p, *p1, *p2, *plim;
struct rtpp_node *pnode;
int weight;
p = rtpproxy;
plim = p + strlen(p);
for(;;) {
weight = 1;
while (*p && isspace((int)*p))
++p;
if (p >= plim)
break;
p1 = p;
while (*p && !isspace((int)*p))
++p;
if (p <= p1)
break; /* may happen??? */
/* Have weight specified? If yes, scan it */
p2 = memchr(p1, '=', p - p1);
if (p2 != NULL) {
weight = strtoul(p2 + 1, NULL, 10);
} else {
p2 = p;
}
pnode = shm_malloc(sizeof(struct rtpp_node));
if (pnode == NULL) {
LM_ERR("no shm memory left\n");
return -1;
}
memset(pnode, 0, sizeof(*pnode));
pnode->idx = rtpp_no++;
pnode->rn_recheck_ticks = 0;
pnode->rn_weight = weight;
pnode->rn_umode = 0;
pnode->rn_disabled = 0;
pnode->rn_url.s = shm_malloc(p2 - p1 + 1);
if (pnode->rn_url.s == NULL) {
shm_free(pnode);
LM_ERR("no shm memory left\n");
return -1;
}
memmove(pnode->rn_url.s, p1, p2 - p1);
pnode->rn_url.s[p2 - p1] = 0;
pnode->rn_url.len = p2-p1;
LM_DBG("url is %s, len is %i\n", pnode->rn_url.s, pnode->rn_url.len);
/* Leave only address in rn_address */
pnode->rn_address = pnode->rn_url.s;
if (strncasecmp(pnode->rn_address, "udp:", 4) == 0) {
pnode->rn_umode = 1;
pnode->rn_address += 4;
} else if (strncasecmp(pnode->rn_address, "udp6:", 5) == 0) {
pnode->rn_umode = 6;
pnode->rn_address += 5;
} else if (strncasecmp(pnode->rn_address, "unix:", 5) == 0) {
pnode->rn_umode = 0;
pnode->rn_address += 5;
}
if (rtpp_list->rn_first == NULL) {
rtpp_list->rn_first = pnode;
} else {
rtpp_list->rn_last->rn_next = pnode;
}
rtpp_list->rn_last = pnode;
rtpp_list->rtpp_node_count++;
}
return 0;
}
/* 0-succes
* -1 - erorr
* */
static int rtpproxy_add_rtpproxy_set( char * rtp_proxies)
{
char *p,*p2;
struct rtpp_set * rtpp_list;
unsigned int my_current_id;
str id_set;
int new_list;
/* empty definition? */
p= rtp_proxies;
if(!p || *p=='\0'){
return 0;
}
for(;*p && isspace(*p);p++);
if(*p=='\0'){
return 0;
}
rtp_proxies = strstr(p, "==");
if(rtp_proxies){
if(*(rtp_proxies +2)=='\0'){
LM_ERR("script error -invalid rtp proxy list!\n");
return -1;
}
*rtp_proxies = '\0';
p2 = rtp_proxies-1;
for(;isspace(*p2); *p2 = '\0',p2--);
id_set.s = p; id_set.len = p2 - p+1;
if(id_set.len <= 0 ||str2int(&id_set, &my_current_id)<0 ){
LM_ERR("script error -invalid set_id value!\n");
return -1;
}
rtp_proxies+=2;
}else{
rtp_proxies = p;
my_current_id = DEFAULT_RTPP_SET_ID;
}
for(;*rtp_proxies && isspace(*rtp_proxies);rtp_proxies++);
if(!(*rtp_proxies)){
LM_ERR("script error -empty rtp_proxy list\n");
return -1;;
}
/*search for the current_id*/
rtpp_list = rtpp_set_list ? rtpp_set_list->rset_first : 0;
while( rtpp_list != 0 && rtpp_list->id_set!=my_current_id)
rtpp_list = rtpp_list->rset_next;
if(rtpp_list==NULL){ /*if a new id_set : add a new set of rtpp*/
rtpp_list = shm_malloc(sizeof(struct rtpp_set));
if(!rtpp_list){
LM_ERR("no shm memory left\n");
return -1;
}
memset(rtpp_list, 0, sizeof(struct rtpp_set));
rtpp_list->id_set = my_current_id;
new_list = 1;
} else {
new_list = 0;
}
if(add_rtpproxy_socks(rtpp_list, rtp_proxies)!= 0){
/*if this list will not be inserted, clean it up*/
goto error;
}
if (new_list) {
if(!rtpp_set_list){/*initialize the list of set*/
rtpp_set_list = shm_malloc(sizeof(struct rtpp_set_head));
if(!rtpp_set_list){
LM_ERR("no shm memory left\n");
return -1;
}
memset(rtpp_set_list, 0, sizeof(struct rtpp_set_head));
}
/*update the list of set info*/
if(!rtpp_set_list->rset_first){
rtpp_set_list->rset_first = rtpp_list;
}else{
rtpp_set_list->rset_last->rset_next = rtpp_list;
}
rtpp_set_list->rset_last = rtpp_list;
rtpp_set_count++;
if(my_current_id == DEFAULT_RTPP_SET_ID){
default_rtpp_set = rtpp_list;
}
}
return 0;
error:
return -1;
}
static int fixup_set_id(void ** param, int param_no)
{
int int_val, err;
struct rtpp_set* rtpp_list;
int_val = str2s(*param, strlen(*param), &err);
if (err == 0) {
pkg_free(*param);
if((rtpp_list = select_rtpp_set(int_val)) ==0){
LM_ERR("rtpp_proxy set %i not configured\n", int_val);
return E_CFG;
}
*param = (void *)rtpp_list;
return 0;
} else {
LM_ERR("bad number <%s>\n", (char *)(*param));
return E_CFG;
}
}
static struct mi_root* mi_enable_rtp_proxy(struct mi_root* cmd_tree,
void* param )
{ struct mi_node* node;
str rtpp_url;
unsigned int enable;
struct rtpp_set * rtpp_list;
struct rtpp_node * crt_rtpp;
int found;
found = 0;
if(rtpp_set_list ==NULL)
goto end;
node = cmd_tree->node.kids;
if(node == NULL)
return init_mi_tree( 400, MI_MISSING_PARM_S, MI_MISSING_PARM_LEN);
if(node->value.s == NULL || node->value.len ==0)
return init_mi_tree( 400, MI_BAD_PARM_S, MI_BAD_PARM_LEN);
rtpp_url = node->value;
node = node->next;
if(node == NULL)
return init_mi_tree( 400, MI_MISSING_PARM_S, MI_MISSING_PARM_LEN);
enable = 0;
if( strno2int( &node->value, &enable) <0)
goto error;
for(rtpp_list = rtpp_set_list->rset_first; rtpp_list != NULL;
rtpp_list = rtpp_list->rset_next){
for(crt_rtpp = rtpp_list->rn_first; crt_rtpp != NULL;
crt_rtpp = crt_rtpp->rn_next){
/*found a matching rtpp*/
if(crt_rtpp->rn_url.len == rtpp_url.len){
if(strncmp(crt_rtpp->rn_url.s, rtpp_url.s, rtpp_url.len) == 0){
/*set the enabled/disabled status*/
found = 1;
crt_rtpp->rn_recheck_ticks =
enable? MI_MIN_RECHECK_TICKS : MI_MAX_RECHECK_TICKS;
crt_rtpp->rn_disabled = enable?0:1;
}
}
}
}
end:
if(found)
return init_mi_tree( 200, MI_OK_S, MI_OK_LEN);
return init_mi_tree(404,MI_RTP_PROXY_NOT_FOUND,MI_RTP_PROXY_NOT_FOUND_LEN);
error:
return init_mi_tree( 400, MI_BAD_PARM_S, MI_BAD_PARM_LEN);
}
#define add_rtpp_node_int_info(_parent, _name, _name_len, _value, _child,\
_len, _string, _error)\
do {\
(_string) = int2str((_value), &(_len));\
if((_string) == 0){\
LM_ERR("cannot convert int value\n");\
goto _error;\
}\
if(((_child) = add_mi_node_child((_parent), MI_DUP_VALUE, (_name), \
(_name_len), (_string), (_len)) ) == 0)\
goto _error;\
}while(0);
static struct mi_root* mi_show_rtpproxies(struct mi_root* cmd_tree,
void* param)
{
struct mi_node* node, *crt_node, *child;
struct mi_root* root;
struct mi_attr * attr;
struct rtpp_set * rtpp_list;
struct rtpp_node * crt_rtpp;
char * string, *id;
int id_len, len;
string = id = 0;
root = init_mi_tree(200, MI_OK_S, MI_OK_LEN);
if (!root) {
LM_ERR("the MI tree cannot be initialized!\n");
return 0;
}
if(rtpp_set_list ==NULL)
return root;
node = &root->node;
for(rtpp_list = rtpp_set_list->rset_first; rtpp_list != NULL;
rtpp_list = rtpp_list->rset_next){
for(crt_rtpp = rtpp_list->rn_first; crt_rtpp != NULL;
crt_rtpp = crt_rtpp->rn_next){
id = int2str(rtpp_list->id_set, &id_len);
if(!id){
LM_ERR("cannot convert set id\n");
goto error;
}
if(!(crt_node = add_mi_node_child(node, 0, crt_rtpp->rn_url.s,
crt_rtpp->rn_url.len, 0,0)) ) {
LM_ERR("cannot add the child node to the tree\n");
goto error;
}
LM_DBG("adding node name %s \n",crt_rtpp->rn_url.s );
if((attr = add_mi_attr(crt_node, MI_DUP_VALUE, MI_SET, MI_SET_LEN,
id, id_len))== 0){
LM_ERR("cannot add attributes to the node\n");
goto error;
}
add_rtpp_node_int_info(crt_node, MI_INDEX, MI_INDEX_LEN,
crt_rtpp->idx, child, len,string,error);
add_rtpp_node_int_info(crt_node, MI_DISABLED, MI_DISABLED_LEN,
crt_rtpp->rn_disabled, child, len,string,error);
add_rtpp_node_int_info(crt_node, MI_WEIGHT, MI_WEIGHT_LEN,
crt_rtpp->rn_weight, child, len, string,error);
add_rtpp_node_int_info(crt_node, MI_RECHECK_TICKS,MI_RECHECK_T_LEN,
crt_rtpp->rn_recheck_ticks, child, len, string, error);
}
}
return root;
error:
if (root)
free_mi_tree(root);
return 0;
}
static int
mod_init(void)
{
int i;
if(register_mi_mod(exports.name, mi_cmds)!=0)
{
LM_ERR("failed to register MI commands\n");
return -1;
}
/* any rtpproxy configured? */
if(rtpp_set_list)
default_rtpp_set = select_rtpp_set(DEFAULT_RTPP_SET_ID);
/* storing the list of rtp proxy sets in shared memory*/
for(i=0;i<rtpp_sets;i++){
if(rtpproxy_add_rtpproxy_set(rtpp_strings[i]) !=0){
for(;i<rtpp_sets;i++)
if(rtpp_strings[i])
pkg_free(rtpp_strings[i]);
pkg_free(rtpp_strings);
return -1;
}
if(rtpp_strings[i])
pkg_free(rtpp_strings[i]);
}
if (timeout_socket_str.s==NULL || timeout_socket_str.s[0]==0) {
timeout_socket_str.len = 0;
timeout_socket_str.s = NULL;
} else {
timeout_socket_str.len = strlen(timeout_socket_str.s);
}
if (rtpp_strings)
pkg_free(rtpp_strings);
if (load_tm_api( &tmb ) < 0)
{
LM_DBG("could not load the TM-functions - answer-offer model"
" auto-detection is disabled\n");
memset(&tmb, 0, sizeof(struct tm_binds));
}
return 0;
}
static int
child_init(int rank)
{
int n;
char *cp;
struct addrinfo hints, *res;
struct rtpp_set *rtpp_list;
struct rtpp_node *pnode;
if(rtpp_set_list==NULL )
return 0;
/* Iterate known RTP proxies - create sockets */
mypid = getpid();
rtpp_socks = (int*)pkg_malloc( sizeof(int)*rtpp_no );
if (rtpp_socks==NULL) {
LM_ERR("no more pkg memory\n");
return -1;
}
for(rtpp_list = rtpp_set_list->rset_first; rtpp_list != 0;
rtpp_list = rtpp_list->rset_next){
for (pnode=rtpp_list->rn_first; pnode!=0; pnode = pnode->rn_next){
char *hostname;
if (pnode->rn_umode == 0) {
rtpp_socks[pnode->idx] = -1;
goto rptest;
}
/*
* This is UDP or UDP6. Detect host and port; lookup host;
* do connect() in order to specify peer address
*/
hostname = (char*)pkg_malloc(sizeof(char) * (strlen(pnode->rn_address) + 1));
if (hostname==NULL) {
LM_ERR("no more pkg memory\n");
return -1;
}
strcpy(hostname, pnode->rn_address);
cp = strrchr(hostname, ':');
if (cp != NULL) {
*cp = '\0';
cp++;
}
if (cp == NULL || *cp == '\0')
cp = CPORT;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = (pnode->rn_umode == 6) ? AF_INET6 : AF_INET;
hints.ai_socktype = SOCK_DGRAM;
if ((n = getaddrinfo(hostname, cp, &hints, &res)) != 0) {
LM_ERR("%s\n", gai_strerror(n));
pkg_free(hostname);
return -1;
}
pkg_free(hostname);
rtpp_socks[pnode->idx] = socket((pnode->rn_umode == 6)
? AF_INET6 : AF_INET, SOCK_DGRAM, 0);
if ( rtpp_socks[pnode->idx] == -1) {
LM_ERR("can't create socket\n");
freeaddrinfo(res);
return -1;
}
if (connect( rtpp_socks[pnode->idx], res->ai_addr, res->ai_addrlen) == -1) {
LM_ERR("can't connect to a RTP proxy\n");
close( rtpp_socks[pnode->idx] );
rtpp_socks[pnode->idx] = -1;
freeaddrinfo(res);
return -1;
}
freeaddrinfo(res);
rptest:
pnode->rn_disabled = rtpp_test(pnode, 0, 1);
}
}
return 0;
}
static void mod_destroy(void)
{
struct rtpp_set * crt_list, * last_list;
struct rtpp_node * crt_rtpp, *last_rtpp;
/*free the shared memory*/
if (natping_state)
shm_free(natping_state);
if(rtpp_set_list == NULL)
return;
for(crt_list = rtpp_set_list->rset_first; crt_list != NULL; ){
for(crt_rtpp = crt_list->rn_first; crt_rtpp != NULL; ){
if(crt_rtpp->rn_url.s)
shm_free(crt_rtpp->rn_url.s);
last_rtpp = crt_rtpp;
crt_rtpp = last_rtpp->rn_next;
shm_free(last_rtpp);
}
last_list = crt_list;
crt_list = last_list->rset_next;
shm_free(last_list);
}
shm_free(rtpp_set_list);
}
#define ADD_ADIRECTION 0x01
#define FIX_MEDIP 0x02
#define ADD_ANORTPPROXY 0x04
#define FIX_ORGIP 0x08
#define ADIRECTION "a=direction:active"
#define ADIRECTION_LEN (sizeof(ADIRECTION) - 1)
#define AOLDMEDIP "a=oldmediaip:"
#define AOLDMEDIP_LEN (sizeof(AOLDMEDIP) - 1)
#define AOLDMEDIP6 "a=oldmediaip6:"
#define AOLDMEDIP6_LEN (sizeof(AOLDMEDIP6) - 1)
#define AOLDMEDPRT "a=oldmediaport:"
#define AOLDMEDPRT_LEN (sizeof(AOLDMEDPRT) - 1)
static char * gencookie(void)
{
static char cook[34];
sprintf(cook, "%d_%u ", (int)mypid, myseqn);
myseqn++;
return cook;
}
#if 0
/* XXX */
static int
rtpp_checkcap(struct rtpp_node *node, char *cap, int caplen)
{
char *cp;
struct iovec vf[4] = {{NULL, 0}, {"VF", 2}, {" ", 1}, {NULL, 0}};
vf[3].iov_base = cap;
vf[3].iov_len = caplen;
cp = send_rtpp_command(node, vf, 4);
if (cp == NULL)
return -1;
if (cp[0] == 'E' || atoi(cp) != 1)
return 0;
return 1;
}
#endif
/* XXX */
static int
rtpp_test(struct rtpp_node *node, int isdisabled, int force)
{
#if 0
int rtpp_ver, rval;
char *cp;
struct iovec v[2] = {{NULL, 0}, {"V", 1}};
if(node->rn_recheck_ticks == MI_MAX_RECHECK_TICKS){
LM_DBG("rtpp %s disabled for ever\n", node->rn_url.s);
return 1;
}
if (force == 0) {
if (isdisabled == 0)
return 0;
if (node->rn_recheck_ticks > get_ticks())
return 1;
}
cp = send_rtpp_command(node, v, 2);
if (cp == NULL) {
LM_WARN("can't get version of the RTP proxy\n");
goto error;
}
rtpp_ver = atoi(cp);
if (rtpp_ver != SUP_CPROTOVER) {
LM_WARN("unsupported version of RTP proxy <%s> found: %d supported,"
"%d present\n", node->rn_url.s, SUP_CPROTOVER, rtpp_ver);
goto error;
}
rval = rtpp_checkcap(node, REQ_CPROTOVER, sizeof(REQ_CPROTOVER) - 1);
if (rval == -1) {
LM_WARN("RTP proxy went down during version query\n");
goto error;
}
if (rval == 0) {
LM_WARN("of RTP proxy <%s> doesn't support required protocol version"
"%s\n", node->rn_url.s, REQ_CPROTOVER);
goto error;
}
LM_INFO("rtp proxy <%s> found, support for it %senabled\n",
node->rn_url.s, force == 0 ? "re-" : "");
/* Check for optional capabilities */
rval = rtpp_checkcap(node, REP_CPROTOVER, sizeof(REP_CPROTOVER) - 1);
if (rval != -1) {
node->rn_rep_supported = rval;
} else {
node->rn_rep_supported = 0;
}
rval = rtpp_checkcap(node, PTL_CPROTOVER, sizeof(PTL_CPROTOVER) - 1);
if (rval != -1) {
node->rn_ptl_supported = rval;
} else {
node->rn_ptl_supported = 0;
}
return 0;
error:
LM_WARN("support for RTP proxy <%s> has been disabled%s\n", node->rn_url.s,
rtpproxy_disable_tout < 0 ? "" : " temporarily");
if (rtpproxy_disable_tout >= 0)
node->rn_recheck_ticks = get_ticks() + rtpproxy_disable_tout;
#endif
return 1;
}
char *
send_rtpp_command(struct rtpp_node *node, struct iovec *v, int vcnt, int *outlen)
{
struct sockaddr_un addr;
int fd, len, i;
char *cp;
static char buf[4096];
struct pollfd fds[1];
len = 0;
cp = buf;
if (node->rn_umode == 0) {
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_LOCAL;
strncpy(addr.sun_path, node->rn_address,
sizeof(addr.sun_path) - 1);
#ifdef HAVE_SOCKADDR_SA_LEN
addr.sun_len = strlen(addr.sun_path);
#endif
fd = socket(AF_LOCAL, SOCK_STREAM, 0);
if (fd < 0) {
LM_ERR("can't create socket\n");
goto badproxy;
}
if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
close(fd);
LM_ERR("can't connect to RTP proxy\n");
goto badproxy;
}
do {
len = writev(fd, v + 1, vcnt - 1);
} while (len == -1 && errno == EINTR);
if (len <= 0) {
close(fd);
LM_ERR("can't send command to a RTP proxy\n");
goto badproxy;
}
do {
len = read(fd, buf, sizeof(buf) - 1);
} while (len == -1 && errno == EINTR);
close(fd);
if (len <= 0) {
LM_ERR("can't read reply from a RTP proxy\n");
goto badproxy;
}
} else {
fds[0].fd = rtpp_socks[node->idx];
fds[0].events = POLLIN;
fds[0].revents = 0;
/* Drain input buffer */
while ((poll(fds, 1, 0) == 1) &&
((fds[0].revents & POLLIN) != 0)) {
recv(rtpp_socks[node->idx], buf, sizeof(buf) - 1, 0);
fds[0].revents = 0;
}
v[0].iov_base = gencookie();
v[0].iov_len = strlen(v[0].iov_base);
for (i = 0; i < rtpproxy_retr; i++) {
do {
len = writev(rtpp_socks[node->idx], v, vcnt);
} while (len == -1 && (errno == EINTR || errno == ENOBUFS));
if (len <= 0) {
LM_ERR("can't send command to a RTP proxy\n");
goto badproxy;
}
while ((poll(fds, 1, rtpproxy_tout * 1000) == 1) &&
(fds[0].revents & POLLIN) != 0) {
do {
len = recv(rtpp_socks[node->idx], buf, sizeof(buf)-1, 0);
} while (len == -1 && errno == EINTR);
if (len <= 0) {
LM_ERR("can't read reply from a RTP proxy\n");
goto badproxy;
}
if (len >= (v[0].iov_len - 1) &&
memcmp(buf, v[0].iov_base, (v[0].iov_len - 1)) == 0) {
len -= (v[0].iov_len - 1);
cp += (v[0].iov_len - 1);
if (len != 0) {
len--;
cp++;
}
goto out;
}
fds[0].revents = 0;
}
}
if (i == rtpproxy_retr) {
LM_ERR("timeout waiting reply from a RTP proxy\n");
goto badproxy;
}
}
out:
cp[len] = '\0';
*outlen = len;
return cp;
badproxy:
LM_ERR("proxy <%s> does not respond, disable it\n", node->rn_url.s);
node->rn_disabled = 1;
node->rn_recheck_ticks = get_ticks() + rtpproxy_disable_tout;
return NULL;
}
/*
* select the set with the id_set id
*/
static struct rtpp_set * select_rtpp_set(int id_set ){
struct rtpp_set * rtpp_list;
/*is it a valid set_id?*/
if(!rtpp_set_list || !rtpp_set_list->rset_first){
LM_ERR("no rtp_proxy configured\n");
return 0;
}
for(rtpp_list=rtpp_set_list->rset_first; rtpp_list!=0 &&
rtpp_list->id_set!=id_set; rtpp_list=rtpp_list->rset_next);
if(!rtpp_list){
LM_ERR(" script error-invalid id_set to be selected\n");
}
return rtpp_list;
}
/*
* Main balancing routine. This does not try to keep the same proxy for
* the call if some proxies were disabled or enabled; proxy death considered
* too rare. Otherwise we should implement "mature" HA clustering, which is
* too expensive here.
*/
struct rtpp_node *
select_rtpp_node(str callid, int do_test)
{
unsigned sum, sumcut, weight_sum;
struct rtpp_node* node;
int was_forced;
if(!selected_rtpp_set){
LM_ERR("script error -no valid set selected\n");
return NULL;
}
/* Most popular case: 1 proxy, nothing to calculate */
if (selected_rtpp_set->rtpp_node_count == 1) {
node = selected_rtpp_set->rn_first;
if (node->rn_disabled && node->rn_recheck_ticks <= get_ticks())
node->rn_disabled = rtpp_test(node, 1, 0);
return node->rn_disabled ? NULL : node;
}
/* XXX Use quick-and-dirty hashing algo */
for(sum = 0; callid.len > 0; callid.len--)
sum += callid.s[callid.len - 1];
sum &= 0xff;
was_forced = 0;
retry:
weight_sum = 0;
for (node=selected_rtpp_set->rn_first; node!=NULL; node=node->rn_next) {
if (node->rn_disabled && node->rn_recheck_ticks <= get_ticks()){
/* Try to enable if it's time to try. */
node->rn_disabled = rtpp_test(node, 1, 0);
}
if (!node->rn_disabled)
weight_sum += node->rn_weight;
}
if (weight_sum == 0) {
/* No proxies? Force all to be redetected, if not yet */
if (was_forced)
return NULL;
was_forced = 1;
for(node=selected_rtpp_set->rn_first; node!=NULL; node=node->rn_next) {
node->rn_disabled = rtpp_test(node, 1, 1);
}
goto retry;
}
sumcut = sum % weight_sum;
/*
* sumcut here lays from 0 to weight_sum-1.
* Scan proxy list and decrease until appropriate proxy is found.
*/
for (node=selected_rtpp_set->rn_first; node!=NULL; node=node->rn_next) {
if (node->rn_disabled)
continue;
if (sumcut < node->rn_weight)
goto found;
sumcut -= node->rn_weight;
}
/* No node list */
return NULL;
found:
if (do_test) {
node->rn_disabled = rtpp_test(node, node->rn_disabled, 0);
if (node->rn_disabled)
goto retry;
}
return node;
}
static int
unforce_rtp_proxy0_f(struct sip_msg* msg, char* str1, char* str2)
{
char arg[1] = {'\0'};
return unforce_rtp_proxy1_f(msg, arg, str2);
}
static inline int parse_rtpproxy_flags(const char *str1, struct rtpproxy_flags *flags, bencode_item_t *dict, int offer)
{
const char *cp;
for (cp = str1; cp != NULL && *cp != '\0'; cp++) {
switch (*cp) {
case '1':
flags->via = 1;
break;
case '2':
flags->via = 2;
break;
case 'a':
case 'A':
if (flags->flags) {
if (!bencode_list_add_string(flags->flags, "asymmetric"))
goto benc_error;
}
break;
case 'i':
case 'I':
if (flags->flags) {
if (!bencode_list_add_string(flags->direction, "internal"))
goto benc_error;
}
break;
case 'e':
case 'E':
if (flags->direction) {
if (!bencode_list_add_string(flags->direction, "external"))
goto benc_error;
}
break;
case 'l':
case 'L':
if (offer == 0)
goto error;
flags->flookup = 1;
break;
case 'f':
case 'F':
case 'r':
case 'R':
case 'o':
case 'O':
case 'c':
case 'C':
/* ignored for compatibility */
break;
case 'w':
case 'W':
if (flags->flags) {
if (!bencode_list_add_string(flags->flags, "symmetric"))
goto benc_error;
}
break;
#if 0
case 'z':
case 'Z':
if (append_opts(&rep_opts, 'Z') == -1) {
LM_ERR("out of pkg memory\n");
goto error;
}
/* If there are any digits following Z copy them into the command */
for (; cp[1] != '\0' && isdigit(cp[1]); cp++) {
if (append_opts(&rep_opts, cp[1]) == -1) {
LM_ERR("out of pkg memory\n");
goto error;
}
}
break;
#endif
default:
LM_ERR("unknown option `%c'\n", *cp);
goto error;
}
}
/* only add those if any flags were given at all */
if (flags->direction && flags->direction->child) {
if (!bencode_dictionary_add(dict, "direction", flags->direction))
goto benc_error;
}
if (flags->flags && flags->flags->child) {
if (!bencode_dictionary_add(dict, "flags", flags->flags))
goto benc_error;
}
return 0;
benc_error:
LM_ERR("out of memory - bencode failed\n");
error:
return -1;
}
static int
unforce_rtp_proxy1_f(struct sip_msg* msg, char* str1, char* str2)
{
bencode_buffer_t bencbuf;
bencode_item_t *dict;
int ret, iov_cnt;
struct iovec *iov;
str callid, from_tag, to_tag, viabranch;
char *cp;
struct rtpp_node *node;
struct rtpproxy_flags flags;
if (bencode_buffer_init(&bencbuf)) {
LM_ERR("could not initialized bencode_buffer_t\n");
goto error_nb;
}
dict = bencode_dictionary(&bencbuf);
if (!dict)
goto benc_error;
memset(&flags, 0, sizeof(flags));
if (parse_rtpproxy_flags(str1, &flags, dict, 0))
goto error;
if (get_callid(msg, &callid) == -1 || callid.len == 0) {
LM_ERR("can't get Call-Id field\n");
goto error;
}
if (!bencode_dictionary_add_str(dict, "call-id", &callid))
goto benc_error;
to_tag.s = 0;
if (get_to_tag(msg, &to_tag) == -1) {
LM_ERR("can't get To tag\n");
goto error;
}
if (get_from_tag(msg, &from_tag) == -1 || from_tag.len == 0) {
LM_ERR("can't get From tag\n");
goto error;
}
if (flags.via) {
if (flags.via == 1)
ret = get_via_branch(msg, 1, &viabranch);
else /* (via == 2) */
ret = get_via_branch(msg, 2, &viabranch);
if (ret == -1 || viabranch.len == 0) {
LM_ERR("can't get Via branch\n");
goto error;
}
if (!bencode_dictionary_add_str(dict, "via-branch", &viabranch))
goto benc_error;
}
if (!bencode_dictionary_add_str(dict, "from-tag", &to_tag))
goto benc_error;
if (to_tag.s && to_tag.len && !bencode_dictionary_add_str(dict, "to-tag", &to_tag))
goto benc_error;
if(msg->id != current_msg_id)
selected_rtpp_set = default_rtpp_set;
if (!bencode_dictionary_add_string(dict, "command", "delete"))
goto benc_error;
node = select_rtpp_node(callid, 1);
if (!node) {
LM_ERR("no available proxies\n");
goto error;
}
iov = bencode_iovec(dict, &iov_cnt, 1, 0);
if (!iov)
goto benc_error;
iov_cnt++; /* cookie */
cp = send_rtpp_command(node, iov, iov_cnt, &ret);
/* XXX do something with the response here */
bencode_buffer_free(&bencbuf);
return 1;
benc_error:
LM_ERR("out of memory - bencode failed\n");
error:
bencode_buffer_free(&bencbuf);
error_nb:
return -1;
}
/* This function assumes p points to a line of requested type. */
static int
set_rtp_proxy_set_f(struct sip_msg * msg, char * str1, char * str2)
{
current_msg_id = msg->id;
selected_rtpp_set = (struct rtpp_set *)str1;
return 1;
}
static int
rtpproxy_manage(struct sip_msg *msg, char *flags, char *ip)
{
char *cp = NULL;
char newip[IP_ADDR_MAX_STR_SIZE];
int method;
int nosdp;
if(msg->cseq==NULL && ((parse_headers(msg, HDR_CSEQ_F, 0)==-1)
|| (msg->cseq==NULL)))
{
LM_ERR("no CSEQ header\n");
return -1;
}
method = get_cseq(msg)->method_id;
if(!(method==METHOD_INVITE || method==METHOD_ACK || method==METHOD_CANCEL
|| method==METHOD_BYE || method==METHOD_UPDATE))
return -1;
if(method==METHOD_CANCEL || method==METHOD_BYE)
return unforce_rtp_proxy0_f(msg, 0, 0);
if(ip==NULL)
{
cp = ip_addr2a(&msg->rcv.dst_ip);
strcpy(newip, cp);
}
if(msg->msg_flags & FL_SDP_BODY)
nosdp = 0;
else
nosdp = parse_sdp(msg);
if(msg->first_line.type == SIP_REQUEST) {
if(method==METHOD_ACK && nosdp==0)
return force_rtp_proxy(msg, flags, (cp!=NULL)?newip:ip, 0,
(ip!=NULL)?1:0);
if(method==METHOD_UPDATE && nosdp==0)
return force_rtp_proxy(msg, flags, (cp!=NULL)?newip:ip, 1,
(ip!=NULL)?1:0);
if(method==METHOD_INVITE && nosdp==0) {
msg->msg_flags |= FL_SDP_BODY;
if(tmb.t_gett!=NULL && tmb.t_gett()!=NULL
&& tmb.t_gett()!=T_UNDEFINED)
tmb.t_gett()->uas.request->msg_flags |= FL_SDP_BODY;
if(route_type==FAILURE_ROUTE)
return unforce_rtp_proxy0_f(msg, 0, 0);
return force_rtp_proxy(msg, flags, (cp!=NULL)?newip:ip, 1,
(ip!=NULL)?1:0);
}
} else if(msg->first_line.type == SIP_REPLY) {
if(msg->first_line.u.reply.statuscode>=300)
return unforce_rtp_proxy0_f(msg, 0, 0);
if(nosdp==0) {
if(method==METHOD_UPDATE)
return force_rtp_proxy(msg, flags, (cp!=NULL)?newip:ip, 0,
(ip!=NULL)?1:0);
if(tmb.t_gett==NULL || tmb.t_gett()==NULL
|| tmb.t_gett()==T_UNDEFINED)
return force_rtp_proxy(msg, flags, (cp!=NULL)?newip:ip, 0,
(ip!=NULL)?1:0);
if(tmb.t_gett()->uas.request->msg_flags & FL_SDP_BODY)
return force_rtp_proxy(msg, flags, (cp!=NULL)?newip:ip, 0,
(ip!=NULL)?1:0);
return force_rtp_proxy(msg, flags, (cp!=NULL)?newip:ip, 1,
(ip!=NULL)?1:0);
}
}
return -1;
}
static int
rtpproxy_manage0(struct sip_msg *msg, char *flags, char *ip)
{
return rtpproxy_manage(msg, 0, 0);
}
static int
rtpproxy_manage1(struct sip_msg *msg, char *flags, char *ip)
{
return rtpproxy_manage(msg, flags, 0);
}
static int
rtpproxy_manage2(struct sip_msg *msg, char *flags, char *ip)
{
return rtpproxy_manage(msg, flags, ip);
}
static int
rtpproxy_offer1_f(struct sip_msg *msg, char *str1, char *str2)
{
char *cp;
char newip[IP_ADDR_MAX_STR_SIZE];
cp = ip_addr2a(&msg->rcv.dst_ip);
strcpy(newip, cp);
return force_rtp_proxy(msg, str1, newip, 1, 0);
}
static int
rtpproxy_offer2_f(struct sip_msg *msg, char *param1, char *param2)
{
return force_rtp_proxy(msg, param1, param2, 1, 1);
}
static int
rtpproxy_answer1_f(struct sip_msg *msg, char *str1, char *str2)
{
char *cp;
char newip[IP_ADDR_MAX_STR_SIZE];
if (msg->first_line.type == SIP_REQUEST)
if (msg->first_line.u.request.method_value != METHOD_ACK)
return -1;
cp = ip_addr2a(&msg->rcv.dst_ip);
strcpy(newip, cp);
return force_rtp_proxy(msg, str1, newip, 0, 0);
}
static int
rtpproxy_answer2_f(struct sip_msg *msg, char *param1, char *param2)
{
if (msg->first_line.type == SIP_REQUEST)
if (msg->first_line.u.request.method_value != METHOD_ACK)
return -1;
return force_rtp_proxy(msg, param1, param2, 0, 1);
}
static int
force_rtp_proxy(struct sip_msg* msg, char* str1, char* str2, int offer, int forcedIP)
{
bencode_buffer_t bencbuf;
bencode_item_t *dict;
int ret, iov_cnt, create;
struct iovec *iov;
str body, newbody;
str callid, from_tag, to_tag, viabranch, tmp;
struct lump *anchor;
struct rtpp_node *node;
char *cp;
struct rtpproxy_flags flags;
newbody.s = NULL;
if (bencode_buffer_init(&bencbuf)) {
LM_ERR("could not initialized bencode_buffer_t\n");
goto error_nb;
}
dict = bencode_dictionary(&bencbuf);
if (!dict)
goto benc_error;
memset(&flags, 0, sizeof(flags));
flags.flags = bencode_list(&bencbuf);
if (!flags.flags)
goto benc_error;
flags.direction = bencode_list(&bencbuf);
if (!flags.direction)
goto benc_error;
if (parse_rtpproxy_flags(str1, &flags, dict, offer))
goto error;
create = offer ? 1 : 0;
/* extract_body will also parse all the headers in the message as
* a side effect => don't move get_callid/get_to_tag in front of it
* -- andrei */
if (extract_body(msg, &body) == -1) {
LM_ERR("can't extract body from the message\n");
goto error;
}
if (!bencode_dictionary_add_str(dict, "sdp", &body))
goto benc_error;
if (get_callid(msg, &callid) == -1 || callid.len == 0) {
LM_ERR("can't get Call-Id field\n");
goto error;
}
if (!bencode_dictionary_add_str(dict, "call-id", &callid))
goto benc_error;
to_tag.s = 0;
if (get_to_tag(msg, &to_tag) == -1) {
LM_ERR("can't get To tag\n");
goto error;
}
if (get_from_tag(msg, &from_tag) == -1 || from_tag.len == 0) {
LM_ERR("can't get From tag\n");
goto error;
}
if (flags.via) {
if (flags.via == 1)
ret = get_via_branch(msg, 1, &viabranch);
else /* (via == 2) */
ret = get_via_branch(msg, 2, &viabranch);
if (ret == -1 || viabranch.len == 0) {
LM_ERR("can't get Via branch\n");
goto error;
}
if (!bencode_dictionary_add_str(dict, "via-branch", &viabranch))
goto benc_error;
}
if (flags.flookup != 0) {
if (to_tag.len == 0) {
goto error;
}
create = 0;
} else if ((msg->first_line.type == SIP_REPLY && offer != 0)
|| (msg->first_line.type == SIP_REQUEST && offer == 0)) {
if (to_tag.len == 0) {
goto error;
}
tmp = from_tag;
from_tag = to_tag;
to_tag = tmp;
}
if (!bencode_dictionary_add_str(dict, "from-tag", &to_tag))
goto benc_error;
if (to_tag.s && to_tag.len && !bencode_dictionary_add_str(dict, "to-tag", &to_tag))
goto benc_error;
if(msg->id != current_msg_id)
selected_rtpp_set = default_rtpp_set;
if (!bencode_dictionary_add_string(dict, "command", (create == 0) ? "answer" : "offer"))
goto benc_error;
iov = bencode_iovec(dict, &iov_cnt, 1, 0);
if (!iov)
goto benc_error;
iov_cnt++; /* cookie */
do {
node = select_rtpp_node(callid, 1);
if (!node) {
LM_ERR("no available proxies\n");
goto error;
}
cp = send_rtpp_command(node, iov, iov_cnt, &ret);
} while (cp == NULL);
LM_DBG("proxy reply: %.*s\n", ret, cp);
dict = bencode_decode_expect(&bencbuf, cp, ret, BENCODE_DICTIONARY);
if (!dict) {
LM_ERR("failed to decode bencoded reply from proxy: %.*s\n", ret, cp);
goto error;
}
if (bencode_dictionary_get_str_pkg(&newbody, dict, "sdp")) {
LM_ERR("failed to extract sdp body from proxy reply: %.*s\n", ret, cp);
goto error;
}
anchor = del_lump(msg, body.s - msg->buf, body.len, 0);
if (!anchor) {
LM_ERR("del_lump failed\n");
goto error;
}
if (!insert_new_lump_after(anchor, newbody.s, newbody.len, 0)) {
LM_ERR("insert_new_lump_after failed\n");
goto error;
}
newbody.s = NULL;
bencode_buffer_free(&bencbuf);
return 1;
benc_error:
LM_ERR("out of memory - bencode failed\n");
error:
bencode_buffer_free(&bencbuf);
error_nb:
if (newbody.s)
pkg_free(newbody.s);
return -1;
}
static int start_recording_f(struct sip_msg* msg, char *foo, char *bar)
{
#if 0
int nitems;
str callid = {0, 0};
str from_tag = {0, 0};
str to_tag = {0, 0};
struct rtpp_node *node;
struct iovec v[1 + 4 + 3] = {{NULL, 0}, {"R", 1}, {" ", 1}, {NULL, 0}, {" ", 1}, {NULL, 0}, {" ", 1}, {NULL, 0}};
/* 1 */ /* 2 */ /* 3 */ /* 4 */ /* 5 */ /* 6 */ /* 1 */
if (get_callid(msg, &callid) == -1 || callid.len == 0) {
LM_ERR("can't get Call-Id field\n");
return -1;
}
if (get_to_tag(msg, &to_tag) == -1) {
LM_ERR("can't get To tag\n");
return -1;
}
if (get_from_tag(msg, &from_tag) == -1 || from_tag.len == 0) {
LM_ERR("can't get From tag\n");
return -1;
}
if(msg->id != current_msg_id){
selected_rtpp_set = default_rtpp_set;
}
STR2IOVEC(callid, v[3]);
STR2IOVEC(from_tag, v[5]);
STR2IOVEC(to_tag, v[7]);
node = select_rtpp_node(callid, 1);
if (!node) {
LM_ERR("no available proxies\n");
return -1;
}
nitems = 8;
if (msg->first_line.type == SIP_REPLY) {
if (to_tag.len == 0)
return -1;
STR2IOVEC(to_tag, v[5]);
STR2IOVEC(from_tag, v[7]);
} else {
STR2IOVEC(from_tag, v[5]);
STR2IOVEC(to_tag, v[7]);
if (to_tag.len <= 0)
nitems = 6;
}
send_rtpp_command(node, v, nitems);
#endif
return 1;
}
/*
* Returns the current RTP-Statistics from the RTP-Proxy
*/
static int
pv_get_rtpstat_f(struct sip_msg *msg, pv_param_t *param,
pv_value_t *res)
{
#if 0
str ret_val = {0, 0};
int nitems;
str callid = {0, 0};
str from_tag = {0, 0};
str to_tag = {0, 0};
struct rtpp_node *node;
struct iovec v[1 + 4 + 3 + 1] = {{NULL, 0}, {"Q", 1}, {" ", 1}, {NULL, 0},
{" ", 1}, {NULL, 0}, {";1 ", 3}, {";1", }, {NULL, 0}};
if (get_callid(msg, &callid) == -1 || callid.len == 0) {
LM_ERR("can't get Call-Id field\n");
return pv_get_null(msg, param, res);
}
if (get_to_tag(msg, &to_tag) == -1) {
LM_ERR("can't get To tag\n");
return pv_get_null(msg, param, res);
}
if (get_from_tag(msg, &from_tag) == -1 || from_tag.len == 0) {
LM_ERR("can't get From tag\n");
return pv_get_null(msg, param, res);
}
if(msg->id != current_msg_id){
selected_rtpp_set = default_rtpp_set;
}
STR2IOVEC(callid, v[3]);
STR2IOVEC(from_tag, v[5]);
STR2IOVEC(to_tag, v[7]);
node = select_rtpp_node(callid, 1);
if (!node) {
LM_ERR("no available proxies\n");
return -1;
}
nitems = 8;
if (msg->first_line.type == SIP_REPLY) {
if (to_tag.len == 0)
return -1;
STR2IOVEC(to_tag, v[5]);
STR2IOVEC(from_tag, v[7]);
} else {
STR2IOVEC(from_tag, v[5]);
STR2IOVEC(to_tag, v[7]);
if (to_tag.len <= 0)
nitems = 6;
}
ret_val.s = send_rtpp_command(node, v, nitems);
if(ret_val.s==NULL)
return pv_get_null(msg, param, res);
ret_val.len = strlen(ret_val.s);
return pv_get_strval(msg, param, res, &ret_val);
#else
return 1;
#endif
}
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