Re: [SR-Users] WebRTC ACK Protocol [solved]

Hi, Just a suggestion to put the contact alias function under the "is_first_hop()" condition. That'll help you in case multiple Kamailios are in the call path.

if(is_first_hop()){ add_contact_alias(); }

Regards, Sammy

On Thu, Apr 4, 2019 at 6:07 AM Ilie Soltanici iliusha.md@gmail.com wrote:

Adding Contact alias in 200 OK, fixed the issue:

if (nat_uac_test(64)) { add_contact_alias(); }

Thank You.

În mie., 3 apr. 2019 la 23:58, Ilie Soltanici iliusha.md@gmail.com a scris:

...

Hello,

Config is more or less like the standard one:

route[WITHINDLG] { if (!has_totag()) return; if (loose_route()) { route(RURIALIAS); if ( is_method("ACK") ) { xlogl("L_INFO", "[$cfg(route)] ACK is forwarded statelessy\n"); route(NATMANAGE); } else if (is_method("NOTIFY") ) { # Add Record-Route for in-dialog NOTIFY as per RFC 6665. route(RECORD_ROUTE); } xlogl("L_INFO", "[$cfg(route)] In Dialog loose_route, Relaying\n"); route(RELAY); exit; };

if (is_method("SUBSCRIBE") && uri == myself) {
  xlogl("L_INFO", "[$cfg(route)] in-dialog subscribe requests,

Checking Dialog.\n"); route(PRESENCE); exit; }

if ( is_method("ACK") ) {
  if ( t_check_trans() ) {
    xlogl("L_INFO", "[$cfg(route)] ACK in transaction. Relaying\n");
    route(RELAY);
    exit;
    } else {
      xlogl("L_WARN", "[$cfg(route)] ACK without matching transaction

... ignore and discard\n"); sl_send_reply("606", "Not Acceptable"); exit; } }

  xlogl("L_WARN", "[$cfg(route)] Unknown Dialog\n");
  sl_send_reply("404","Not Found");
  exit;

}

route[RURIALIAS] { if(isdsturiset() || ($du != "")) { xlogl("L_INFO", "[$cfg(route)]: Destination URI is set, no un-aliasing is needed\n"); return; }

xlogl("L_INFO", "[$cfg(route)] --Start Route--\n");
xlogl("L_INFO", "[$cfg(route)]: Route using R-URI, any alias on R-URI

('$ru')?\n");

handle_ruri_alias();
switch ($rc) {
case -1:
    xlogl("L_WARN", "[$cfg(route)]: Failed to handle alias of R-URI

$ru\n"); send_reply("400","Bad Request"); exit; case 1: xlogl("L_INFO", "[$cfg(route)]: Alias parsed, routing $rm from $fu to $du\n"); break; case 2: xlogl("L_INFO", "[$cfg(route)]: Alias not found, routing $rm from $fu to $ru\n"); break; };

return;

}

route[NATMANAGE] { if(has_body("application/sdp")) { route(RTPMANAGE); }

# Set FLB_NATB? Only in within-dialog request with nat=yes on Route

header initiated by AS if (is_request() && has_totag() && check_route_param("nat=yes") && isflagset(FLS_FROM_ASTERISK)) { setbflag(FLB_NATB); }

# Return unless FLT_NATS or FLB_NATB are set
if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB))) {
    xlogl("L_INFO", "[$cfg(route)] No endpoint is behind NAT,

return\n"); if(nat_uac_test("1")) { xlogl("L_INFO", "[$cfg(route)] Contact is behind NAT, Fixing\n"); fix_nated_contact(); } return; } else { xlogl("L_INFO", "[$cfg(route)] One or both endpoints are behind NAT, continue!\n"); }

# Add nat=yes in record-route? Only in initial requests when called

from branch_route if (is_request() && !has_totag() && t_is_branch_route()) { xlogl("L_INFO", "[$cfg(route)] Add nat=yes to record-route (reason: initial request called from branch route)\n"); add_rr_param(";nat=yes"); }

if (is_reply()) { if(isbflagset(FLB_NATB)) { fix_nated_contact(); } } }

route[RELAY] { route(SETUP_BY_TRANSPORT);

if (is_method("INVITE|BYE|SUBSCRIBE|UPDATE")) { if(!t_is_set("branch_route")) t_on_branch("MANAGE_BRANCH"); } if (is_method("INVITE|SUBSCRIBE|UPDATE")) { if(!t_is_set("onreply_route")) t_on_reply("MANAGE_REPLY"); } if (is_method("INVITE")) { if(!t_is_set("failure_route")) t_on_failure("MANAGE_FAILURE"); }

if (!t_relay()) { sl_reply_error(); } exit; }

}

route[SETUP_BY_TRANSPORT] {

if ($ru =~ "transport=ws") { xlogl("L_INFO","[$cfg(route)] Request going to WS"); if(sdp_with_transport("RTP/SAVPF")) { xlogl("L_INFO","[$cfg(route)] Request going from WS to WS"); rtpengine_manage("force trust-address replace-origin replace-session-connection ICE=force"); t_on_reply("REPLY_WS_TO_WS"); return; } xlogl("L_INFO","[$cfg(route)] Request going to WS from AS"); rtpengine_manage("rtcp-mux-offer generate-mid DTLS=passive SDES-off ICE=force RTP/SAVPF"); force_send_socket(tls:MY_EXTERNAL_IP_ADDR:10443); t_on_reply("REPLY_FROM_WS"); } else if ($proto =~ "ws") { xlog("L_INFO", "Request coming from WS"); rtpengine_manage("rtcp-mux-demux DTLS=off SDES-off ICE=remove RTP/AVP"); t_on_reply("REPLY_TO_WS"); } else { xlog("L_INFO", "This is a classic phone call"); rtpengine_manage("replace-origin replace-session-connection"); t_on_reply("MANAGE_CLASSIC_REPLY"); } }

onreply_route[REPLY_TO_WS] {

xlog("L_INFO", "Reply from softphone: $rs");

if (t_check_status("183")) { change_reply_status("180", "Ringing"); remove_body(); exit; }

if(!(status=~"[12][0-9][0-9]")) return;

# rtpengine_manage("froc+SP"); xlogl("L_INFO","Fixing ICE/SAVPF Parameters"); rtpengine_manage("rtcp-mux-offer generate-mid DTLS=passive SDES-off ICE=force RTP/SAVPF");

}

onreply_route[REPLY_FROM_WS] {

xlog("L_INFO", "Reply from webrtc client: $rs");

if(status=~"[12][0-9][0-9]") { rtpengine_manage("force trust-address replace-origin replace-session-connection ICE=remove RTP/AVP"); # rtpengine_manage("froc-sp"); route(NATMANAGE); } }

onreply_route[MANAGE_CLASSIC_REPLY] { xlog("L_INFO", "Boring reply from softphone: $rs");

if(status=~"[12][0-9][0-9]") { rtpengine_manage("replace-origin replace-session-connection"); # rtpengine_manage("co"); route(NATMANAGE); } }

onreply_route[REPLY_WS_TO_WS] { xlog("L_INFO", "WS to WS"); if(status=~"[12][0-9][0-9]") { rtpengine_manage("force trust-address replace-origin replace-session-connection ICE=force"); route(NATMANAGE); } }

Thank you.

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