Target : oepnsips load balance freeswitch, and use rtpengine to proxy rtp media stream
1、网络拓图扑
opensips-fs-rtpengine
2、准备环境（后续文章更新...）
在debian 10.10系统安装：OpenSIPS 2.14、FreeSWITCH 1.10.5、rtpengine、postgreSQL 9.6、redis 5.*
3、修改数据（注：根据自己环境修改）
opensips database：dispatcher table
INSERT INTO "dispatcher" ("id", "setid", "destination", "socket", "state", "weight", "priority", "attrs", "description") VALUES (1, 1, 'sip:192.168.10.114:5060', '', 0, '50', 0, 'fs1', 'inbound Gateway1');
INSERT INTO "dispatcher" ("id", "setid", "destination", "socket", "state", "weight", "priority", "attrs", "description") VALUES (2, 1, 'sip:192.168.10.112:5060', '', 0, '50', 0, 'fs2', 'inbound Gateway2');
opensips database：load_balancer table
INSERT INTO "load_balancer" ("id", "group_id", "dst_uri", "resources", "probe_mode", "description") VALUES (1, 1, 'sip:192.168.10.112:5060', 'vm=100;conf=100;transc=100;pstn=500', 1, 'internal FS1');
INSERT INTO "load_balancer" ("id", "group_id", "dst_uri", "resources", "probe_mode", "description") VALUES (2, 1, 'sip:192.168.10.114:5060', 'vm=100;conf=100;transc=100;pstn=500', 1, 'internal FS2');
INSERT INTO "load_balancer" ("id", "group_id", "dst_uri", "resources", "probe_mode", "description") VALUES (4, 3, 'sip:192.168.10.114:5080', 'vm=100;conf=100;transc=100;pstn=500', 1, 'external FS1');
INSERT INTO "load_balancer" ("id", "group_id", "dst_uri", "resources", "probe_mode", "description") VALUES (5, 3, 'sip:192.168.10.112:5080', 'vm=100;conf=100;transc=100;pstn=500', 1, 'external FS2');
opensips database：rtpengine table
INSERT INTO "rtpengine" ("id", "socket_uri", "set_id") VALUES (1, 'udp:192.168.10.113:7722', 1);
4、修改opensips.cfg配置（注：根据自己环境修改）
#
# OpenSIPS residential configuration script
# by OpenSIPS Solutions <team@opensips-solutions.com>
#
# This script was generated via "make menuconfig", from
# the "Residential" scenario.
# You can enable / disable more features / functionalities by
# re-generating the scenario with different options.#
#
# Please refer to the Core CookBook at:
# https://opensips.org/Resources/DocsCookbooks
# for a explanation of possible statements, functions and parameters.
#
####### Global Parameters #########
log_level=3
log_stderror=no
log_facility=LOG_LOCAL0
children=4
/* uncomment the following lines to enable debugging */
#debug_mode=yes
/* uncomment the next line to enable the auto temporary blacklisting of
not available destinations (default disabled) */
#disable_dns_blacklist=no
/* uncomment the next line to enable IPv6 lookup after IPv4 dns
lookup failures (default disabled) */
#dns_try_ipv6=yes
/* comment the next line to enable the auto discovery of local aliases
based on reverse DNS on IPs */
auto_aliases=no
listen=udp:192.168.10.109:5060 # CUSTOMIZE ME
listen=tcp:192.168.10.109:5060 # CUSTOMIZE ME
listen=ws:192.168.10.109:5062 # CUSTOMIZE ME
listen=wss:192.168.10.109:5063 # CUSTOMIZE ME
####### Modules Section ########
#set module path
mpath="/tools/install/opensips/lib64/opensips/modules/"
#### SIGNALING module
loadmodule "signaling.so"
#### StateLess module
loadmodule "sl.so"
#### Transaction Module
loadmodule "tm.so"
modparam("tm", "fr_timeout", 5)
modparam("tm", "fr_inv_timeout", 30)
modparam("tm", "restart_fr_on_each_reply", 0)
modparam("tm", "onreply_avp_mode", 1)
#### Record Route Module
loadmodule "rr.so"
/* do not append from tag to the RR (no need for this script) */
modparam("rr", "append_fromtag", 0)
#### MAX ForWarD module
loadmodule "maxfwd.so"
#### SIP MSG OPerationS module
loadmodule "sipmsgops.so"
#### FIFO Management Interface
loadmodule "mi_fifo.so"
modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
modparam("mi_fifo", "fifo_mode", 0666)
#### URI module
loadmodule "uri.so"
modparam("uri", "use_uri_table", 0)
#### PostgreSQL module
loadmodule "db_postgres.so"
#### HTTPD module
loadmodule "httpd.so"
modparam("httpd", "port", 8888)
#### USeR LOCation module
loadmodule "usrloc.so"
modparam("usrloc", "nat_bflag", "NAT")
modparam("usrloc", "db_mode", 2)
modparam("usrloc", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
#### REGISTRAR module
loadmodule "registrar.so"
modparam("registrar", "tcp_persistent_flag", "TCP_PERSISTENT")
modparam("registrar", "received_avp", "$avp(received_nh)")/* uncomment the next line not to allow more than 10 contacts per AOR */
modparam("registrar", "max_contacts", 1)
#### ACCounting module
loadmodule "acc.so"
/* what special events should be accounted ? */
modparam("acc", "early_media", 0)
modparam("acc", "report_cancels", 0)
/* by default we do not adjust the direct of the sequential requests.
if you enable this parameter, be sure the enable "append_fromtag"
in "rr" module */
modparam("acc", "detect_direction", 0)
modparam("acc", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
#### AUTHentication modules
loadmodule "auth.so"
loadmodule "auth_db.so"
modparam("auth_db", "calculate_ha1", yes)
modparam("auth_db", "password_column", "password")
modparam("auth_db|uri", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
modparam("auth_db", "load_credentials", "")
#### ALIAS module
loadmodule "alias_db.so"
modparam("alias_db", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
#### DOMAIN module
loadmodule "domain.so"
modparam("domain", "db_url",
"postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
modparam("domain", "db_mode", 1) # Use caching
modparam("auth_db|usrloc|uri", "use_domain", 1)
#### PRESENCE modules
loadmodule "xcap.so"
loadmodule "presence.so"
loadmodule "presence_xml.so"
modparam("xcap|presence", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
modparam("presence_xml", "force_active", 1)
modparam("presence", "fallback2db", 0)
#### DIALOG module
loadmodule "dialog.so"
modparam("dialog", "dlg_match_mode", 1)
modparam("dialog", "default_timeout", 21600) # 6 hours timeout
modparam("dialog", "db_mode", 2)
modparam("dialog", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
#### NAT modules
loadmodule "nathelper.so"
modparam("nathelper", "natping_interval", 10)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", "SIP_PING_FLAG")
modparam("nathelper", "sipping_from", "sip:pinger@192.168.10.109") # CUSTOMIZE ME
modparam("nathelper", "received_avp", "$avp(received_nh)")
#loadmodule "rtpproxy.so"
#modparam("rtpproxy", "rtpproxy_sock", "udp:192.168.10.113:12221") # CUSTOMIZE ME
#modparam("rtpproxy", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
#modparam("rtpproxy", "default_set", 1)
#modparam("rtpproxy", "rtpproxy_retr", 1)
#modparam("rtpproxy", "rtpproxy_autobridge", 1)
#### RTPengine protocol
loadmodule "rtpengine.so"
modparam("rtpengine", "db_url", "postgres://opensips:123456@192.168.10.114/opensips")
modparam("rtpengine", "socket_column", "socket_uri")
#### DIALPLAN module
loadmodule "dialplan.so"
modparam("dialplan", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
#### DYNAMMIC ROUTING module
loadmodule "drouting.so"
modparam("drouting", "db_url","postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
#### MI_HTTP module
loadmodule "mi_http.so"
loadmodule "mi_json.so"
modparam("mi_json", "mi_json_root", "json")
loadmodule "proto_udp.so"
loadmodule "proto_ws.so"
loadmodule "proto_wss.so"
modparam("proto_ws", "ws_port", 5062)
modparam("proto_wss", "wss_port", 5063)
loadmodule "proto_udp.so"
loadmodule "proto_tcp.so"
loadmodule "proto_tls.so"
loadmodule "tls_mgm.so"
modparam("tls_mgm","tls_method", "TLSv1_2")
modparam("tls_mgm","verify_cert", "0")
modparam("tls_mgm","require_cert", "0")
modparam("tls_mgm","certificate", "/tools/install/opensips/ssl/api.atomscat.com/cert.pem")
modparam("tls_mgm","private_key", "/tools/install/opensips/ssl/api.atomscat.com/privkey.pem")
loadmodule "cachedb_redis.so"
# modparam("cachedb_redis", "cachedb_url","redis:prod://Aa123456@192.168.10.114:6379/")
modparam("cachedb_redis", "cachedb_url","redis://root:Aa123456@192.168.10.114:6379/0")
#### DISPATCHER module
loadmodule "dispatcher.so"
modparam("dispatcher", "db_url", "postgres://opensips:123456@192.168.10.114/opensips")
modparam("dispatcher", "ds_ping_method", "INFO")
modparam("dispatcher", "ds_ping_interval", 5)
modparam("dispatcher", "ds_probing_threshhold", 2)
modparam("dispatcher", "ds_probing_mode", 1)
#### load_balancer
loadmodule "load_balancer.so"
modparam("load_balancer", "db_url", "postgres://opensips:123456@192.168.10.114/opensips") # CUSTOMIZE ME
modparam("load_balancer", "probing_method", "INFO")
modparam("load_balancer", "probing_interval", 5)
modparam("load_balancer", "probing_reply_codes", "501, 403")
loadmodule "msilo.so"
modparam("msilo", "db_url", "postgres://opensips:123456@192.168.10.114/opensips")
#### AVPOPS module
loadmodule "avpops.so"
modparam("avpops", "db_url", "postgres://opensips:123456@192.168.10.114/opensips")
####### Routing Logic ########
# main request routing logic
route{
# initial NAT handling; detect if the request comes from behind a NAT
# and apply contact fixing
force_rport();
if (nat_uac_test("23")) {
if (is_method("REGISTER")) {
fix_nated_register();
setbflag(NAT);
} else {
fix_nated_contact();
setflag(NAT);
}
}
if (!mf_process_maxfwd_header("10")) {
send_reply("483","Too Many Hops");
exit;
}
if (is_method("BYE")) {
rtpengine_use_set("1");
rtpengine_delete();
}
if ($pr == "ws" || $pr == "wss") {
setflag(SRC_WS);
xlog("ws: $pr " );
}
if (has_totag()) {
# handle hop-by-hop ACK (no routing required)
if ( is_method("ACK") && t_check_trans() ) {
t_relay();
exit;
}
# sequential request within a dialog should
# take the path determined by record-routing
if ( !loose_route() ) {
if (is_method("SUBSCRIBE") && is_myself("$rd")) {
# in-dialog subscribe requests
route(handle_presence);
exit;
}
# we do record-routing for all our traffic, so we should not
# receive any sequential requests without Route hdr.
send_reply("404","Not here");
exit;
}
# validate the sequential request against dialog
if ( $DLG_status!=NULL && !validate_dialog() ) {
xlog("In-Dialog $rm from $si (callid=$ci) is not valid according to dialog\n");
## exit;
}
if (is_method("BYE")) {
# do accounting even if the transaction fails
do_accounting("db","failed");
}
if (check_route_param("nat=yes"))
setflag(NAT);
# route it out to whatever destination was set by loose_route()
# in $du (destination URI).
route(relay);
exit;
}
# CANCEL processing
if (is_method("CANCEL")) {
if (t_check_trans())
t_relay();
exit;
}
# absorb retransmissions, but do not create transaction
t_check_trans();
if ( !(is_method("REGISTER") || is_from_gw() ) ) {
if (is_from_local()) {
# authenticate if from local subscriber
# authenticate all initial non-REGISTER request that pretend to be
# generated by local subscriber (domain from FROM URI is local)
if (!proxy_authorize("", "subscriber")) {
proxy_challenge("", "0");
exit;
}
if (!db_check_from()) {
send_reply("403","Forbidden auth ID");
exit;
}
consume_credentials();
# caller authenticated
} else {
# if caller is not local, then called number must be local
if (!is_uri_host_local()) {
send_reply("403","Relay Forbidden");
exit;
}
}
}
# preloaded route checking
if (loose_route()) {
xlog("L_ERR",
"Attempt to route with preloaded Route's [$fu/$tu/$ru/$ci]");
if (!is_method("ACK"))
send_reply("403","Preload Route denied");
exit;
}
# record routing
if (!is_method("REGISTER"))
record_route();
if (is_method("MESSAGE")) {
# 获取呼叫的目标
if (!lookup("location","m")) {
}
xlog("MESSAGE: $ru");
}
# account only INVITEs
if (is_method("INVITE")) {
#if (!lookup("location","m")) {
#}
xlog("si: $si, sp: $sp, ru: $ru");
# remove_hf("To");
# append_hf("To: $ru\r\n", "From");
# create dialog with timeout
if ( !create_dialog("B") ) {
send_reply("500","Internal Server Error");
exit;
}
# 判断请求的来源ip、端口是不是“3”集群中的地址
if (lb_is_destination("$si","$sp","3") ) {
xlog("FS TO OPENSIPS，再到终端");
if (!lookup("location", "m")) {
t_reply("404", "Not Found");
exit;
}
} else {
xlog("终端 TO OPENSIPS，再到 FS");
# 选举 fs, todo
if (!lb_start_or_next("1","pstn","ns")) {
send_reply("500","Internal Server Error");
exit;
}
}
$avp(received_nh) = $ru;
xlog("$du , $ru ");
do_accounting("db");
}
if (!is_uri_host_local()) {
append_hf("P-hint: outbound\r\n");
route(relay);
}
# requests for my domain
if( is_method("PUBLISH|SUBSCRIBE"))
route(handle_presence);
if (is_method("REGISTER")) {
# authenticate the REGISTER requests
if (!www_authorize("", "subscriber")) {
www_challenge("", "0");
exit;
}
if (!db_check_to()) {
send_reply("403","Forbidden auth ID");
exit;
}
if ($proto == "tcp" || $proto == "tls")
setflag(TCP_PERSISTENT);
if (isflagset(NAT)) {
setbflag(SIP_PING_FLAG);
}
# store the registration and generate a SIP reply
if($pr == "ws" || $pr == "wss") {
setbflag(DST_WS);
fix_nated_register();
if(!save("location","f")) {
xlog(" ws registerer error");
}
} else {
if (!save("location")) {
xlog("failed to register AoR $tu\n");
}
}
xlog("$fd:$aU $ct.fields(uri) ");
cache_store("redis", "$fd:$au", "$ct.fields(uri)", 3600);
exit;
}
if ($rU==NULL) {
# request with no Username in RURI
send_reply("484","Address Incomplete");
exit;
}
# apply DB based aliases
alias_db_lookup("dbaliases");
# apply transformations from dialplan table
dp_translate("0","$rU/$rU");
if ($rU=~"^\+[1-9][0-9]+$") {
if (!do_routing("0")) {
send_reply("500","No PSTN Route found");
exit;
}
route(relay);
exit;
}
if (isbflagset(NAT)) setflag(NAT);
# when routing via usrloc, log the missed calls also
do_accounting("db","missed");
route(relay);
}
route[relay] {
# for INVITEs enable some additional helper routes
if (is_method("INVITE")) {
if (isflagset(NAT) && has_body("application/sdp") ) {
route(rtpengine_offer);
}
t_on_branch("per_branch_ops");
t_on_reply("handle_nat");
t_on_failure("missed_call");
xlog(" $du");
}
if (isflagset(NAT)) {
add_rr_param(";nat=yes");
}
if (!t_relay()) {
send_reply("500","Internal Error");
}
exit;
}
# Presence route
route[handle_presence]
{
if (!t_newtran()) {
sl_reply_error();
exit;
}
if(is_method("PUBLISH")) {
handle_publish();
} else
if( is_method("SUBSCRIBE")) {
handle_subscribe();
}
exit;
}
branch_route[per_branch_ops] {
xlog("new branch at $ru\n");
}
onreply_route[handle_nat] {
if (nat_uac_test("1")) {
fix_nated_contact();
xlog(" reply route: $du $ru $avp(received_nh)");
}
if ( isflagset(NAT) && has_body("application/sdp")) {
route(rtpengine_answer);
}
xlog("incoming reply\n");
}
failure_route[missed_call] {
if (t_was_cancelled()) {
exit;
}
# redirect the failed to a different VM system
if (t_check_status("486|408")) {
# do not set the missed call flag again
xlog("486|408");
t_reply("486","Busy Here");
exit;
}
}
local_route {
if (is_method("BYE") && $DLG_dir=="UPSTREAM") {
acc_db_request("200 Dialog Timeout", "acc");
}
}
route[rtpengine_offer] {
if (isflagset(SRC_WS) && isbflagset(DST_WS))
# - Web to web
$var(reflags) = "trust-addres sreplace-origin replace-session-connection SDES-off ICE=force";
else if (isflagset(SRC_WS))
# - Web to SIP
$var(reflags) = "trust-addres replace-origin replace-session-connection rtcp-mux-demux ICE=remove RTP/AVP";
else if (isbflagset(DST_WS))
# - SIP to web
$var(reflags) = "trust-addres replace-origin replace-session-connection rtcp-mux-offer ICE=force transcode-opus transcode-G722 transcode-PCMU SDES-off UDP/TLS/RTP/SAVP";
else
# - SIP to SIP
$var(reflags) = "trust-addres replace-origin replace-session-connection rtcp-mux-demux ICE=remove RTP/AVP";
rtpengine_use_set("1");
rtpengine_offer("$var(reflags)");
}
route[rtpengine_answer] {
if (isflagset(SRC_WS) && isbflagset(DST_WS))
# - Web to web
$var(reflags) = "trust-addres replace-origin replace-session-connection SDES-off ICE=force";
else if (isflagset(SRC_WS))
# - Web to SIP
$var(reflags) = "trust-addres replace-origin replace-session-connection rtcp-mux-require ICE=force RTP/SAVPF";
else if (isbflagset(DST_WS))
# - SIP to web
$var(reflags) = "trust-addres replace-origin replace-session-connection rtcp-mux-offer ICE=force transcode-opus transcode-G722 transcode-PCMU SDES-off UDP/TLS/RTP/SAVP";
else
# - SIP to SIP
$var(reflags) = "trust-addres replace-origin replace-session-connection rtcp-mux-demux ICE=remove RTP/AVP";
rtpengine_use_set("1");
rtpengine_answer("$var(reflags)");
}
5、修改freeswitch拨号计划：${freeswitch_home}/conf/dialplan/default.xml
<extension name="Local_Extension">
<condition field="destination_number" expression="^(10[01][0-9])$">
<!-- 获取opensips 的 headre 属性 to 呼叫 -->
<action application="bridge" data="sofia/external/${sip_to_uri}" />
</condition>
</extension>
