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Diffstat (limited to 'contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.util.js')
| -rw-r--r-- | contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.util.js | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.util.js b/contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.util.js new file mode 100644 index 00000000..042a123c --- /dev/null +++ b/contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.util.js @@ -0,0 +1,408 @@ +/** + * Contains utility classes used in SDP class. + * + */ + +/** + * Class holds a=ssrc lines and media type a=mid + * @param ssrc synchronization source identifier number(a=ssrc lines from SDP) + * @param type media type eg. "audio" or "video"(a=mid frm SDP) + * @constructor + */ +function ChannelSsrc(ssrc, type) { + this.ssrc = ssrc; + this.type = type; + this.lines = []; +} + +/** + * Class holds a=ssrc-group: lines + * @param semantics + * @param ssrcs + * @constructor + */ +function ChannelSsrcGroup(semantics, ssrcs, line) { + this.semantics = semantics; + this.ssrcs = ssrcs; +} + +/** + * Helper class represents media channel. Is a container for ChannelSsrc, holds channel idx and media type. + * @param channelNumber channel idx in SDP media array. + * @param mediaType media type(a=mid) + * @constructor + */ +function MediaChannel(channelNumber, mediaType) { + /** + * SDP channel number + * @type {*} + */ + this.chNumber = channelNumber; + /** + * Channel media type(a=mid) + * @type {*} + */ + this.mediaType = mediaType; + /** + * The maps of ssrc numbers to ChannelSsrc objects. + */ + this.ssrcs = {}; + + /** + * The array of ChannelSsrcGroup objects. + * @type {Array} + */ + this.ssrcGroups = []; +} + +SDPUtil = { + iceparams: function (mediadesc, sessiondesc) { + var data = null; + if (SDPUtil.find_line(mediadesc, 'a=ice-ufrag:', sessiondesc) && + SDPUtil.find_line(mediadesc, 'a=ice-pwd:', sessiondesc)) { + data = { + ufrag: SDPUtil.parse_iceufrag(SDPUtil.find_line(mediadesc, 'a=ice-ufrag:', sessiondesc)), + pwd: SDPUtil.parse_icepwd(SDPUtil.find_line(mediadesc, 'a=ice-pwd:', sessiondesc)) + }; + } + return data; + }, + parse_iceufrag: function (line) { + return line.substring(12); + }, + build_iceufrag: function (frag) { + return 'a=ice-ufrag:' + frag; + }, + parse_icepwd: function (line) { + return line.substring(10); + }, + build_icepwd: function (pwd) { + return 'a=ice-pwd:' + pwd; + }, + parse_mid: function (line) { + return line.substring(6); + }, + parse_mline: function (line) { + var parts = line.substring(2).split(' '), + data = {}; + data.media = parts.shift(); + data.port = parts.shift(); + data.proto = parts.shift(); + if (parts[parts.length - 1] === '') { // trailing whitespace + parts.pop(); + } + data.fmt = parts; + return data; + }, + build_mline: function (mline) { + return 'm=' + mline.media + ' ' + mline.port + ' ' + mline.proto + ' ' + mline.fmt.join(' '); + }, + parse_rtpmap: function (line) { + var parts = line.substring(9).split(' '), + data = {}; + data.id = parts.shift(); + parts = parts[0].split('/'); + data.name = parts.shift(); + data.clockrate = parts.shift(); + data.channels = parts.length ? parts.shift() : '1'; + return data; + }, + /** + * Parses SDP line "a=sctpmap:..." and extracts SCTP port from it. + * @param line eg. "a=sctpmap:5000 webrtc-datachannel" + * @returns [SCTP port number, protocol, streams] + */ + parse_sctpmap: function (line) + { + var parts = line.substring(10).split(' '); + var sctpPort = parts[0]; + var protocol = parts[1]; + // Stream count is optional + var streamCount = parts.length > 2 ? parts[2] : null; + return [sctpPort, protocol, streamCount];// SCTP port + }, + build_rtpmap: function (el) { + var line = 'a=rtpmap:' + el.getAttribute('id') + ' ' + el.getAttribute('name') + '/' + el.getAttribute('clockrate'); + if (el.getAttribute('channels') && el.getAttribute('channels') != '1') { + line += '/' + el.getAttribute('channels'); + } + return line; + }, + parse_crypto: function (line) { + var parts = line.substring(9).split(' '), + data = {}; + data.tag = parts.shift(); + data['crypto-suite'] = parts.shift(); + data['key-params'] = parts.shift(); + if (parts.length) { + data['session-params'] = parts.join(' '); + } + return data; + }, + parse_fingerprint: function (line) { // RFC 4572 + var parts = line.substring(14).split(' '), + data = {}; + data.hash = parts.shift(); + data.fingerprint = parts.shift(); + // TODO assert that fingerprint satisfies 2UHEX *(":" 2UHEX) ? + return data; + }, + parse_fmtp: function (line) { + var parts = line.split(' '), + i, key, value, + data = []; + parts.shift(); + parts = parts.join(' ').split(';'); + for (i = 0; i < parts.length; i++) { + key = parts[i].split('=')[0]; + while (key.length && key[0] == ' ') { + key = key.substring(1); + } + value = parts[i].split('=')[1]; + if (key && value) { + data.push({name: key, value: value}); + } else if (key) { + // rfc 4733 (DTMF) style stuff + data.push({name: '', value: key}); + } + } + return data; + }, + parse_icecandidate: function (line) { + var candidate = {}, + elems = line.split(' '); + candidate.foundation = elems[0].substring(12); + candidate.component = elems[1]; + candidate.protocol = elems[2].toLowerCase(); + candidate.priority = elems[3]; + candidate.ip = elems[4]; + candidate.port = elems[5]; + // elems[6] => "typ" + candidate.type = elems[7]; + candidate.generation = 0; // default value, may be overwritten below + for (var i = 8; i < elems.length; i += 2) { + switch (elems[i]) { + case 'raddr': + candidate['rel-addr'] = elems[i + 1]; + break; + case 'rport': + candidate['rel-port'] = elems[i + 1]; + break; + case 'generation': + candidate.generation = elems[i + 1]; + break; + case 'tcptype': + candidate.tcptype = elems[i + 1]; + break; + default: // TODO + console.log('parse_icecandidate not translating "' + elems[i] + '" = "' + elems[i + 1] + '"'); + } + } + candidate.network = '1'; + candidate.id = Math.random().toString(36).substr(2, 10); // not applicable to SDP -- FIXME: should be unique, not just random + return candidate; + }, + build_icecandidate: function (cand) { + var line = ['a=candidate:' + cand.foundation, cand.component, cand.protocol, cand.priority, cand.ip, cand.port, 'typ', cand.type].join(' '); + line += ' '; + switch (cand.type) { + case 'srflx': + case 'prflx': + case 'relay': + if (cand.hasOwnAttribute('rel-addr') && cand.hasOwnAttribute('rel-port')) { + line += 'raddr'; + line += ' '; + line += cand['rel-addr']; + line += ' '; + line += 'rport'; + line += ' '; + line += cand['rel-port']; + line += ' '; + } + break; + } + if (cand.hasOwnAttribute('tcptype')) { + line += 'tcptype'; + line += ' '; + line += cand.tcptype; + line += ' '; + } + line += 'generation'; + line += ' '; + line += cand.hasOwnAttribute('generation') ? cand.generation : '0'; + return line; + }, + parse_ssrc: function (desc) { + // proprietary mapping of a=ssrc lines + // TODO: see "Jingle RTP Source Description" by Juberti and P. Thatcher on google docs + // and parse according to that + var lines = desc.split('\r\n'), + data = {}; + for (var i = 0; i < lines.length; i++) { + if (lines[i].substring(0, 7) == 'a=ssrc:') { + var idx = lines[i].indexOf(' '); + data[lines[i].substr(idx + 1).split(':', 2)[0]] = lines[i].substr(idx + 1).split(':', 2)[1]; + } + } + return data; + }, + parse_rtcpfb: function (line) { + var parts = line.substr(10).split(' '); + var data = {}; + data.pt = parts.shift(); + data.type = parts.shift(); + data.params = parts; + return data; + }, + parse_extmap: function (line) { + var parts = line.substr(9).split(' '); + var data = {}; + data.value = parts.shift(); + if (data.value.indexOf('/') != -1) { + data.direction = data.value.substr(data.value.indexOf('/') + 1); + data.value = data.value.substr(0, data.value.indexOf('/')); + } else { + data.direction = 'both'; + } + data.uri = parts.shift(); + data.params = parts; + return data; + }, + find_line: function (haystack, needle, sessionpart) { + var lines = haystack.split('\r\n'); + for (var i = 0; i < lines.length; i++) { + if (lines[i].substring(0, needle.length) == needle) { + return lines[i]; + } + } + if (!sessionpart) { + return false; + } + // search session part + lines = sessionpart.split('\r\n'); + for (var j = 0; j < lines.length; j++) { + if (lines[j].substring(0, needle.length) == needle) { + return lines[j]; + } + } + return false; + }, + find_lines: function (haystack, needle, sessionpart) { + var lines = haystack.split('\r\n'), + needles = []; + for (var i = 0; i < lines.length; i++) { + if (lines[i].substring(0, needle.length) == needle) + needles.push(lines[i]); + } + if (needles.length || !sessionpart) { + return needles; + } + // search session part + lines = sessionpart.split('\r\n'); + for (var j = 0; j < lines.length; j++) { + if (lines[j].substring(0, needle.length) == needle) { + needles.push(lines[j]); + } + } + return needles; + }, + candidateToJingle: function (line) { + // a=candidate:2979166662 1 udp 2113937151 192.168.2.100 57698 typ host generation 0 + // <candidate component=... foundation=... generation=... id=... ip=... network=... port=... priority=... protocol=... type=.../> + if (line.indexOf('candidate:') === 0) { + line = 'a=' + line; + } else if (line.substring(0, 12) != 'a=candidate:') { + console.log('parseCandidate called with a line that is not a candidate line'); + console.log(line); + return null; + } + if (line.substring(line.length - 2) == '\r\n') // chomp it + line = line.substring(0, line.length - 2); + var candidate = {}, + elems = line.split(' '), + i; + if (elems[6] != 'typ') { + console.log('did not find typ in the right place'); + console.log(line); + return null; + } + candidate.foundation = elems[0].substring(12); + candidate.component = elems[1]; + candidate.protocol = elems[2].toLowerCase(); + candidate.priority = elems[3]; + candidate.ip = elems[4]; + candidate.port = elems[5]; + // elems[6] => "typ" + candidate.type = elems[7]; + + candidate.generation = '0'; // default, may be overwritten below + for (i = 8; i < elems.length; i += 2) { + switch (elems[i]) { + case 'raddr': + candidate['rel-addr'] = elems[i + 1]; + break; + case 'rport': + candidate['rel-port'] = elems[i + 1]; + break; + case 'generation': + candidate.generation = elems[i + 1]; + break; + case 'tcptype': + candidate.tcptype = elems[i + 1]; + break; + default: // TODO + console.log('not translating "' + elems[i] + '" = "' + elems[i + 1] + '"'); + } + } + candidate.network = '1'; + candidate.id = Math.random().toString(36).substr(2, 10); // not applicable to SDP -- FIXME: should be unique, not just random + return candidate; + }, + candidateFromJingle: function (cand) { + var line = 'a=candidate:'; + line += cand.getAttribute('foundation'); + line += ' '; + line += cand.getAttribute('component'); + line += ' '; + line += cand.getAttribute('protocol'); //.toUpperCase(); // chrome M23 doesn't like this + line += ' '; + line += cand.getAttribute('priority'); + line += ' '; + line += cand.getAttribute('ip'); + line += ' '; + line += cand.getAttribute('port'); + line += ' '; + line += 'typ'; + line += ' ' + cand.getAttribute('type'); + line += ' '; + switch (cand.getAttribute('type')) { + case 'srflx': + case 'prflx': + case 'relay': + if (cand.getAttribute('rel-addr') && cand.getAttribute('rel-port')) { + line += 'raddr'; + line += ' '; + line += cand.getAttribute('rel-addr'); + line += ' '; + line += 'rport'; + line += ' '; + line += cand.getAttribute('rel-port'); + line += ' '; + } + break; + } + if (cand.getAttribute('protocol').toLowerCase() == 'tcp') { + line += 'tcptype'; + line += ' '; + line += cand.getAttribute('tcptype'); + line += ' '; + } + line += 'generation'; + line += ' '; + line += cand.getAttribute('generation') || '0'; + return line + '\r\n'; + } +}; + +exports.SDPUtil = SDPUtil; + |