var grammar = module.exports = { v: [{ name: 'version', reg: /^(\d*)$/ }], o: [{ // o=- 20518 0 IN IP4 203.0.113.1 // NB: sessionId will be a String in most cases because it is huge name: 'origin', reg: /^(\S*) (\d*) (\d*) (\S*) IP(\d) (\S*)/, names: ['username', 'sessionId', 'sessionVersion', 'netType', 'ipVer', 'address'], format: '%s %s %d %s IP%d %s' }], // default parsing of these only (though some of these feel outdated) s: [{ name: 'name' }], i: [{ name: 'description' }], u: [{ name: 'uri' }], e: [{ name: 'email' }], p: [{ name: 'phone' }], z: [{ name: 'timezones' }], // TODO: this one can actually be parsed properly... r: [{ name: 'repeats' }], // TODO: this one can also be parsed properly // k: [{}], // outdated thing ignored t: [{ // t=0 0 name: 'timing', reg: /^(\d*) (\d*)/, names: ['start', 'stop'], format: '%d %d' }], c: [{ // c=IN IP4 10.47.197.26 name: 'connection', reg: /^IN IP(\d) (\S*)/, names: ['version', 'ip'], format: 'IN IP%d %s' }], b: [{ // b=AS:4000 push: 'bandwidth', reg: /^(TIAS|AS|CT|RR|RS):(\d*)/, names: ['type', 'limit'], format: '%s:%s' }], m: [{ // m=video 51744 RTP/AVP 126 97 98 34 31 // NB: special - pushes to session // TODO: rtp/fmtp should be filtered by the payloads found here? reg: /^(\w*) (\d*) ([\w/]*)(?: (.*))?/, names: ['type', 'port', 'protocol', 'payloads'], format: '%s %d %s %s' }], a: [ { // a=rtpmap:110 opus/48000/2 push: 'rtp', reg: /^rtpmap:(\d*) ([\w\-.]*)(?:\s*\/(\d*)(?:\s*\/(\S*))?)?/, names: ['payload', 'codec', 'rate', 'encoding'], format: function (o) { return (o.encoding) ? 'rtpmap:%d %s/%s/%s' : o.rate ? 'rtpmap:%d %s/%s' : 'rtpmap:%d %s'; } }, { // a=fmtp:108 profile-level-id=24;object=23;bitrate=64000 // a=fmtp:111 minptime=10; useinbandfec=1 push: 'fmtp', reg: /^fmtp:(\d*) ([\S| ]*)/, names: ['payload', 'config'], format: 'fmtp:%d %s' }, { // a=control:streamid=0 name: 'control', reg: /^control:(.*)/, format: 'control:%s' }, { // a=rtcp:65179 IN IP4 193.84.77.194 name: 'rtcp', reg: /^rtcp:(\d*)(?: (\S*) IP(\d) (\S*))?/, names: ['port', 'netType', 'ipVer', 'address'], format: function (o) { return (o.address != null) ? 'rtcp:%d %s IP%d %s' : 'rtcp:%d'; } }, { // a=rtcp-fb:98 trr-int 100 push: 'rtcpFbTrrInt', reg: /^rtcp-fb:(\*|\d*) trr-int (\d*)/, names: ['payload', 'value'], format: 'rtcp-fb:%d trr-int %d' }, { // a=rtcp-fb:98 nack rpsi push: 'rtcpFb', reg: /^rtcp-fb:(\*|\d*) ([\w-_]*)(?: ([\w-_]*))?/, names: ['payload', 'type', 'subtype'], format: function (o) { return (o.subtype != null) ? 'rtcp-fb:%s %s %s' : 'rtcp-fb:%s %s'; } }, { // a=extmap:2 urn:ietf:params:rtp-hdrext:toffset // a=extmap:1/recvonly URI-gps-string // a=extmap:3 urn:ietf:params:rtp-hdrext:encrypt urn:ietf:params:rtp-hdrext:smpte-tc 25@600/24 push: 'ext', reg: /^extmap:(\d+)(?:\/(\w+))?(?: (urn:ietf:params:rtp-hdrext:encrypt))? (\S*)(?: (\S*))?/, names: ['value', 'direction', 'encrypt-uri', 'uri', 'config'], format: function (o) { return ( 'extmap:%d' + (o.direction ? '/%s' : '%v') + (o['encrypt-uri'] ? ' %s' : '%v') + ' %s' + (o.config ? ' %s' : '') ); } }, { // a=extmap-allow-mixed name: 'extmapAllowMixed', reg: /^(extmap-allow-mixed)/ }, { // a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:PS1uQCVeeCFCanVmcjkpPywjNWhcYD0mXXtxaVBR|2^20|1:32 push: 'crypto', reg: /^crypto:(\d*) ([\w_]*) (\S*)(?: (\S*))?/, names: ['id', 'suite', 'config', 'sessionConfig'], format: function (o) { return (o.sessionConfig != null) ? 'crypto:%d %s %s %s' : 'crypto:%d %s %s'; } }, { // a=setup:actpass name: 'setup', reg: /^setup:(\w*)/, format: 'setup:%s' }, { // a=connection:new name: 'connectionType', reg: /^connection:(new|existing)/, format: 'connection:%s' }, { // a=mid:1 name: 'mid', reg: /^mid:([^\s]*)/, format: 'mid:%s' }, { // a=msid:0c8b064d-d807-43b4-b434-f92a889d8587 98178685-d409-46e0-8e16-7ef0db0db64a name: 'msid', reg: /^msid:(.*)/, format: 'msid:%s' }, { // a=ptime:20 name: 'ptime', reg: /^ptime:(\d*(?:\.\d*)*)/, format: 'ptime:%d' }, { // a=maxptime:60 name: 'maxptime', reg: /^maxptime:(\d*(?:\.\d*)*)/, format: 'maxptime:%d' }, { // a=sendrecv name: 'direction', reg: /^(sendrecv|recvonly|sendonly|inactive)/ }, { // a=ice-lite name: 'icelite', reg: /^(ice-lite)/ }, { // a=ice-ufrag:F7gI name: 'iceUfrag', reg: /^ice-ufrag:(\S*)/, format: 'ice-ufrag:%s' }, { // a=ice-pwd:x9cml/YzichV2+XlhiMu8g name: 'icePwd', reg: /^ice-pwd:(\S*)/, format: 'ice-pwd:%s' }, { // a=fingerprint:SHA-1 00:11:22:33:44:55:66:77:88:99:AA:BB:CC:DD:EE:FF:00:11:22:33 name: 'fingerprint', reg: /^fingerprint:(\S*) (\S*)/, names: ['type', 'hash'], format: 'fingerprint:%s %s' }, { // a=candidate:0 1 UDP 2113667327 203.0.113.1 54400 typ host // a=candidate:1162875081 1 udp 2113937151 192.168.34.75 60017 typ host generation 0 network-id 3 network-cost 10 // a=candidate:3289912957 2 udp 1845501695 193.84.77.194 60017 typ srflx raddr 192.168.34.75 rport 60017 generation 0 network-id 3 network-cost 10 // a=candidate:229815620 1 tcp 1518280447 192.168.150.19 60017 typ host tcptype active generation 0 network-id 3 network-cost 10 // a=candidate:3289912957 2 tcp 1845501695 193.84.77.194 60017 typ srflx raddr 192.168.34.75 rport 60017 tcptype passive generation 0 network-id 3 network-cost 10 push: 'candidates', reg: /^candidate:(\S*) (\d*) (\S*) (\d*) (\S*) (\d*) typ (\S*)(?: raddr (\S*) rport (\d*))?(?: tcptype (\S*))?(?: generation (\d*))?(?: network-id (\d*))?(?: network-cost (\d*))?/, names: ['foundation', 'component', 'transport', 'priority', 'ip', 'port', 'type', 'raddr', 'rport', 'tcptype', 'generation', 'network-id', 'network-cost'], format: function (o) { var str = 'candidate:%s %d %s %d %s %d typ %s'; str += (o.raddr != null) ? ' raddr %s rport %d' : '%v%v'; // NB: candidate has three optional chunks, so %void middles one if it's missing str += (o.tcptype != null) ? ' tcptype %s' : '%v'; if (o.generation != null) { str += ' generation %d'; } str += (o['network-id'] != null) ? ' network-id %d' : '%v'; str += (o['network-cost'] != null) ? ' network-cost %d' : '%v'; return str; } }, { // a=end-of-candidates (keep after the candidates line for readability) name: 'endOfCandidates', reg: /^(end-of-candidates)/ }, { // a=remote-candidates:1 203.0.113.1 54400 2 203.0.113.1 54401 ... name: 'remoteCandidates', reg: /^remote-candidates:(.*)/, format: 'remote-candidates:%s' }, { // a=ice-options:google-ice name: 'iceOptions', reg: /^ice-options:(\S*)/, format: 'ice-options:%s' }, { // a=ssrc:2566107569 cname:t9YU8M1UxTF8Y1A1 push: 'ssrcs', reg: /^ssrc:(\d*) ([\w_-]*)(?::(.*))?/, names: ['id', 'attribute', 'value'], format: function (o) { var str = 'ssrc:%d'; if (o.attribute != null) { str += ' %s'; if (o.value != null) { str += ':%s'; } } return str; } }, { // a=ssrc-group:FEC 1 2 // a=ssrc-group:FEC-FR 3004364195 1080772241 push: 'ssrcGroups', // token-char = %x21 / %x23-27 / %x2A-2B / %x2D-2E / %x30-39 / %x41-5A / %x5E-7E reg: /^ssrc-group:([\x21\x23\x24\x25\x26\x27\x2A\x2B\x2D\x2E\w]*) (.*)/, names: ['semantics', 'ssrcs'], format: 'ssrc-group:%s %s' }, { // a=msid-semantic: WMS Jvlam5X3SX1OP6pn20zWogvaKJz5Hjf9OnlV name: 'msidSemantic', reg: /^msid-semantic:\s?(\w*) (\S*)/, names: ['semantic', 'token'], format: 'msid-semantic: %s %s' // space after ':' is not accidental }, { // a=group:BUNDLE audio video push: 'groups', reg: /^group:(\w*) (.*)/, names: ['type', 'mids'], format: 'group:%s %s' }, { // a=rtcp-mux name: 'rtcpMux', reg: /^(rtcp-mux)/ }, { // a=rtcp-rsize name: 'rtcpRsize', reg: /^(rtcp-rsize)/ }, { // a=sctpmap:5000 webrtc-datachannel 1024 name: 'sctpmap', reg: /^sctpmap:([\w_/]*) (\S*)(?: (\S*))?/, names: ['sctpmapNumber', 'app', 'maxMessageSize'], format: function (o) { return (o.maxMessageSize != null) ? 'sctpmap:%s %s %s' : 'sctpmap:%s %s'; } }, { // a=x-google-flag:conference name: 'xGoogleFlag', reg: /^x-google-flag:([^\s]*)/, format: 'x-google-flag:%s' }, { // a=rid:1 send max-width=1280;max-height=720;max-fps=30;depend=0 push: 'rids', reg: /^rid:([\d\w]+) (\w+)(?: ([\S| ]*))?/, names: ['id', 'direction', 'params'], format: function (o) { return (o.params) ? 'rid:%s %s %s' : 'rid:%s %s'; } }, { // a=imageattr:97 send [x=800,y=640,sar=1.1,q=0.6] [x=480,y=320] recv [x=330,y=250] // a=imageattr:* send [x=800,y=640] recv * // a=imageattr:100 recv [x=320,y=240] push: 'imageattrs', reg: new RegExp( // a=imageattr:97 '^imageattr:(\\d+|\\*)' + // send [x=800,y=640,sar=1.1,q=0.6] [x=480,y=320] '[\\s\\t]+(send|recv)[\\s\\t]+(\\*|\\[\\S+\\](?:[\\s\\t]+\\[\\S+\\])*)' + // recv [x=330,y=250] '(?:[\\s\\t]+(recv|send)[\\s\\t]+(\\*|\\[\\S+\\](?:[\\s\\t]+\\[\\S+\\])*))?' ), names: ['pt', 'dir1', 'attrs1', 'dir2', 'attrs2'], format: function (o) { return 'imageattr:%s %s %s' + (o.dir2 ? ' %s %s' : ''); } }, { // a=simulcast:send 1,2,3;~4,~5 recv 6;~7,~8 // a=simulcast:recv 1;4,5 send 6;7 name: 'simulcast', reg: new RegExp( // a=simulcast: '^simulcast:' + // send 1,2,3;~4,~5 '(send|recv) ([a-zA-Z0-9\\-_~;,]+)' + // space + recv 6;~7,~8 '(?:\\s?(send|recv) ([a-zA-Z0-9\\-_~;,]+))?' + // end '$' ), names: ['dir1', 'list1', 'dir2', 'list2'], format: function (o) { return 'simulcast:%s %s' + (o.dir2 ? ' %s %s' : ''); } }, { // old simulcast draft 03 (implemented by Firefox) // https://tools.ietf.org/html/draft-ietf-mmusic-sdp-simulcast-03 // a=simulcast: recv pt=97;98 send pt=97 // a=simulcast: send rid=5;6;7 paused=6,7 name: 'simulcast_03', reg: /^simulcast:[\s\t]+([\S+\s\t]+)$/, names: ['value'], format: 'simulcast: %s' }, { // a=framerate:25 // a=framerate:29.97 name: 'framerate', reg: /^framerate:(\d+(?:$|\.\d+))/, format: 'framerate:%s' }, { // RFC4570 // a=source-filter: incl IN IP4 239.5.2.31 10.1.15.5 name: 'sourceFilter', reg: /^source-filter: *(excl|incl) (\S*) (IP4|IP6|\*) (\S*) (.*)/, names: ['filterMode', 'netType', 'addressTypes', 'destAddress', 'srcList'], format: 'source-filter: %s %s %s %s %s' }, { // a=bundle-only name: 'bundleOnly', reg: /^(bundle-only)/ }, { // a=label:1 name: 'label', reg: /^label:(.+)/, format: 'label:%s' }, { // RFC version 26 for SCTP over DTLS // https://tools.ietf.org/html/draft-ietf-mmusic-sctp-sdp-26#section-5 name: 'sctpPort', reg: /^sctp-port:(\d+)$/, format: 'sctp-port:%s' }, { // RFC version 26 for SCTP over DTLS // https://tools.ietf.org/html/draft-ietf-mmusic-sctp-sdp-26#section-6 name: 'maxMessageSize', reg: /^max-message-size:(\d+)$/, format: 'max-message-size:%s' }, { // RFC7273 // a=ts-refclk:ptp=IEEE1588-2008:39-A7-94-FF-FE-07-CB-D0:37 push: 'tsRefClocks', reg: /^ts-refclk:([^\s=]*)(?:=(\S*))?/, names: ['clksrc', 'clksrcExt'], format: function (o) { return 'ts-refclk:%s' + (o.clksrcExt != null ? '=%s' : ''); } }, { // RFC7273 // a=mediaclk:direct=963214424 name: 'mediaClk', reg: /^mediaclk:(?:id=(\S*))? *([^\s=]*)(?:=(\S*))?(?: *rate=(\d+)\/(\d+))?/, names: ['id', 'mediaClockName', 'mediaClockValue', 'rateNumerator', 'rateDenominator'], format: function (o) { var str = 'mediaclk:'; str += (o.id != null ? 'id=%s %s' : '%v%s'); str += (o.mediaClockValue != null ? '=%s' : ''); str += (o.rateNumerator != null ? ' rate=%s' : ''); str += (o.rateDenominator != null ? '/%s' : ''); return str; } }, { // a=keywds:keywords name: 'keywords', reg: /^keywds:(.+)$/, format: 'keywds:%s' }, { // a=content:main name: 'content', reg: /^content:(.+)/, format: 'content:%s' }, // BFCP https://tools.ietf.org/html/rfc4583 { // a=floorctrl:c-s name: 'bfcpFloorCtrl', reg: /^floorctrl:(c-only|s-only|c-s)/, format: 'floorctrl:%s' }, { // a=confid:1 name: 'bfcpConfId', reg: /^confid:(\d+)/, format: 'confid:%s' }, { // a=userid:1 name: 'bfcpUserId', reg: /^userid:(\d+)/, format: 'userid:%s' }, { // a=floorid:1 name: 'bfcpFloorId', reg: /^floorid:(.+) (?:m-stream|mstrm):(.+)/, names: ['id', 'mStream'], format: 'floorid:%s mstrm:%s' }, { // any a= that we don't understand is kept verbatim on media.invalid push: 'invalid', names: ['value'] } ], y: [{ name: 'ssrc' }], }; // set sensible defaults to avoid polluting the grammar with boring details Object.keys(grammar).forEach(function (key) { var objs = grammar[key]; objs.forEach(function (obj) { if (!obj.reg) { obj.reg = /(.*)/; } if (!obj.format) { obj.format = '%s'; } }); });