[html5/audio] Add hackViaWs to SIP.js and make it configurable in settings.yml, 1002 workaround

This adds the possibility to configure the SIP Via header to plain WS to allow reverse proxying from WSS to WS, internally, to work around a bug in freeswitch where the WSS stack would get deadlocked due to a still unidentified bug in there that has to do with SSL termination

bigbluebutton-html5/imports/api/audio/client/bridge/sip.js

@@ -23,6 +23,7 @@ const MEDIA_TAG = MEDIA.mediaTag;
 const CALL_TRANSFER_TIMEOUT = MEDIA.callTransferTimeout;
 const CALL_HANGUP_TIMEOUT = MEDIA.callHangupTimeout;
 const CALL_HANGUP_MAX_RETRIES = MEDIA.callHangupMaximumRetries;
+const SIPJS_HACK_VIA_WS = MEDIA.sipjsHackViaWs;
 const IPV4_FALLBACK_DOMAIN = Meteor.settings.public.app.ipv4FallbackDomain;
 const CALL_CONNECT_TIMEOUT = 20000;
 const ICE_NEGOTIATION_TIMEOUT = 20000;
@@ -379,6 +380,7 @@ class SIPSession {
         displayName: callerIdName,
         register: false,
         userAgentString: 'BigBlueButton',
+        hackViaWs: SIPJS_HACK_VIA_WS,
       });
 
       const handleUserAgentConnection = () => {

bigbluebutton-html5/private/config/settings.yml

@@ -289,6 +289,7 @@ public:
     #so far. Increasing this value might help avoiding 1004 error when
     #user activates microphone.
     iceGatheringTimeout: 5000
+    sipjsHackViaWs: false
   presentation:
     defaultPresentationFile: default.pdf
     panZoomThrottle: 32

bigbluebutton-html5/public/compatibility/sip.js

@@ -3831,6 +3831,7 @@ class OutgoingRequestMessage {
             fromTag: "",
             forceRport: false,
             hackViaTcp: false,
+            hackViaWs: false,
             optionTags: ["outbound"],
             routeSet: [],
             userAgentString: "sip.js",
@@ -3937,6 +3938,8 @@ class OutgoingRequestMessage {
         // FIXME: Hack
         if (this.options.hackViaTcp) {
             transport = "TCP";
+        } else if (this.options.hackViaWs) {
+            transport = "WS";
         }
         let via = "SIP/2.0/" + transport;
         via += " " + this.options.viaHost + ";branch=" + branch;
@@ -9812,6 +9815,7 @@ class UserAgentCore {
         const fromDisplayName = this.configuration.displayName;
         const forceRport = this.configuration.viaForceRport;
         const hackViaTcp = this.configuration.hackViaTcp;
+        const hackViaWs = this.configuration.hackViaWs;
         const optionTags = this.configuration.supportedOptionTags.slice();
         if (method === _messages__WEBPACK_IMPORTED_MODULE_0__["C"].REGISTER) {
             optionTags.push("path", "gruu");
@@ -9827,6 +9831,7 @@ class UserAgentCore {
             forceRport,
             fromDisplayName,
             hackViaTcp,
+            hackViaWs,
             optionTags,
             routeSet,
             userAgentString,
@@ -17303,6 +17308,7 @@ class UserAgent {
             hackAllowUnregisteredOptionTags: false,
             hackIpInContact: false,
             hackViaTcp: false,
+            hackViaWs: false,
             hackWssInTransport: false,
             logBuiltinEnabled: true,
             logConfiguration: true,
@@ -17657,6 +17663,7 @@ class UserAgent {
             displayName: this.options.displayName,
             loggerFactory: this.loggerFactory,
             hackViaTcp: this.options.hackViaTcp,
+            hackViaWs: this.options.hackViaWs,
             routeSet: this.options.preloadedRouteSet,
             supportedOptionTags,
             supportedOptionTagsResponse,