New subject: [EXTERNAL] Re: Kamailio not deleteing rtp sessions

22 Oct 2024


      Hello,
I'm using Kamailio + RTPEngine. Everything works well except one thing. I
noticed rtp sessions are not being deleted after call termination. Instead,
they remain lingering on RTPEngine waiting for a timeout.
kamailio --version
version: kamailio 5.5.2 (x86_64/linux) 55e232
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE,
USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC,
TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST,
HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024,
BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: 55e232
compiled on 14:13:04 Aug 25 2021 with gcc 8.4.1
rtpengine --version
Version: 9.5.1.1-1.el8
rtpengine-ctl list totals tells me every session went to timeout :)
--- snip ---
Total statistics (does not include current running sessions):
Uptime of rtpengine                             :914 seconds
 Total managed sessions                          :51
 Total rejected sessions                         :0
 Total timed-out sessions via TIMEOUT            :51
 Total timed-out sessions via SILENT_TIMEOUT     :0
 Total timed-out sessions via FINAL_TIMEOUT      :0
 Total timed-out sessions via OFFER_TIMEOUT      :0
 Total regular terminated sessions               :0
 Total forced terminated sessions                :0
--- snip ---
I'm using rtpengine_manage in two routes "route[RELAY]" and
onreply_route[MANAGE_REPLY] . Do I need to add a specific rtpengine_delete
somewhere ?
route[RELAY] {
...
$xavp(r=>$T_branch_idx) = "replace-origin
replace-session-connection";
        if (!nat_uac_test("8")) {
                $xavp(r=>$T_branch_idx) = $xavp(r=>$T_branch_idx) + "
trust-address";
        }
        if (!has_totag()) {
                xlog("L_INFO", "NEXIOS: proto = [$proto], ru = [$ru]");
                if ($proto =~ "ws" && !($ru =~ "transport=ws")) {
                        xlog("L_INFO", "####################### FROM WS to
any ########################\n");
                        $xavp(r=>$T_branch_idx) = $xavp(r=>$T_branch_idx) +
" rtcp-mux-demux DTLS=off SDES-off ICE=remove RTP/AVP direction=external
direction=internal";
} else if (!($proto =~ "ws") && $ru =~ "transport=ws") {
                        xlog("L_INFO", "####################### FROM any to
WS ########################\n");
                        setbflag(FLB_TOWEBRTC);
                        $xavp(r=>$T_branch_idx) = $xavp(r=>$T_branch_idx) +
" rtcp-mux-offer generate-mid DTLS=active SDES-off ICE=force RTP/SAVPF
direction=internal direction=external";
} else if (($proto =~ "udp") && $ru =~ "transport=udp" &&
$fs =~ "MY_IP2_ADDR") {
                        xlog("L_INFO", "####################### FROM ?? to
?? $ru ########################\n");
}
        }
        # we engage RTPEngine
        if (has_body("application/sdp")) {
                xlog("L_INFO", "NEXIOS: # $xavp(r=>$T_branch_idx) #\n");
                rtpengine_manage($xavp(r=>$T_branch_idx));
        }
if (!t_relay()) {
                sl_reply_error();
        }
        exit;
}
onreply_route[MANAGE_REPLY] {
...
$xavp(r=>$T_branch_idx) = "replace-origin
replace-session-connection";
        if (!nat_uac_test("8")) {
                $xavp(r=>$T_branch_idx) = $xavp(r=>$T_branch_idx) + "
trust-address";
        }
        if (has_totag()) {
                xlog("L_INFO", "onreply_route proto = [$proto], ru =
[$ru]");
                if ($proto =~ "ws" && !($ru =~ "transport=ws")) {
                        xlog("L_INFO", "onreply_route
####################### FROM WS to any ########################\n");
                        $xavp(r=>$T_branch_idx) = $xavp(r=>$T_branch_idx) +
" rtcp-mux-demux DTLS=off SDES-off ICE=remove RTP/AVP direction=external
direction=internal";
} else if (!($proto =~ "ws") && $ru =~ "transport=ws") {
                        xlog("L_INFO", "onreply_route
####################### FROM any to WS ########################\n");
setbflag(FLB_TOWEBRTC);
                        $xavp(r=>$T_branch_idx) = $xavp(r=>$T_branch_idx) +
" rtcp-mux-offer generate-mid DTLS=active SDES-off ICE=force RTP/SAVPF
direction=internal direction=external";
} else if (($proto =~ "udp") && $ru =~ "transport=udp" &&
$fs =~ "MY_IP2_ADDR") {
                        xlog("L_INFO", "onreply_route
####################### FROM ?? to ?? $ru ########################\n");
}
}
        if (has_body("application/sdp")) {
                xlog("L_INFO", "onreply_route # $xavp(r=>$T_branch_idx)
#\n");
                rtpengine_manage($xavp(r=>$T_branch_idx));
        }
}
Any ideas are appreciated.
Regards,
Tihomir.