802 lines
30 KiB
JavaScript
802 lines
30 KiB
JavaScript
/* jshint -W117 */
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// SDP STUFF
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function SDP(sdp) {
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this.media = sdp.split('\r\nm=');
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for (var i = 1; i < this.media.length; i++) {
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this.media[i] = 'm=' + this.media[i];
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if (i != this.media.length - 1) {
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this.media[i] += '\r\n';
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}
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}
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this.session = this.media.shift() + '\r\n';
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this.raw = this.session + this.media.join('');
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}
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// remove iSAC and CN from SDP
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SDP.prototype.mangle = function () {
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var i, j, mline, lines, rtpmap, newdesc;
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for (i = 0; i < this.media.length; i++) {
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lines = this.media[i].split('\r\n');
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lines.pop(); // remove empty last element
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mline = SDPUtil.parse_mline(lines.shift());
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if (mline.media != 'audio')
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continue;
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newdesc = '';
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mline.fmt.length = 0;
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for (j = 0; j < lines.length; j++) {
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if (lines[j].substr(0, 9) == 'a=rtpmap:') {
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rtpmap = SDPUtil.parse_rtpmap(lines[j]);
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if (rtpmap.name == 'CN' || rtpmap.name == 'ISAC')
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continue;
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mline.fmt.push(rtpmap.id);
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newdesc += lines[j] + '\r\n';
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} else {
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newdesc += lines[j] + '\r\n';
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}
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}
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this.media[i] = SDPUtil.build_mline(mline) + '\r\n';
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this.media[i] += newdesc;
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}
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this.raw = this.session + this.media.join('');
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};
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// remove lines matching prefix from session section
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SDP.prototype.removeSessionLines = function(prefix) {
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var self = this;
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var lines = SDPUtil.find_lines(this.session, prefix);
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lines.forEach(function(line) {
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self.session = self.session.replace(line + '\r\n', '');
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});
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this.raw = this.session + this.media.join('');
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return lines;
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}
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// remove lines matching prefix from a media section specified by mediaindex
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// TODO: non-numeric mediaindex could match mid
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SDP.prototype.removeMediaLines = function(mediaindex, prefix) {
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var self = this;
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var lines = SDPUtil.find_lines(this.media[mediaindex], prefix);
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lines.forEach(function(line) {
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self.media[mediaindex] = self.media[mediaindex].replace(line + '\r\n', '');
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});
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this.raw = this.session + this.media.join('');
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return lines;
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}
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// add content's to a jingle element
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SDP.prototype.toJingle = function (elem, thecreator) {
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var i, j, k, mline, ssrc, rtpmap, tmp, line, lines;
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var self = this;
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// new bundle plan
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if (SDPUtil.find_line(this.session, 'a=group:')) {
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lines = SDPUtil.find_lines(this.session, 'a=group:');
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for (i = 0; i < lines.length; i++) {
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tmp = lines[i].split(' ');
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var semantics = tmp.shift().substr(8);
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elem.c('group', {xmlns: 'urn:xmpp:jingle:apps:grouping:0', semantics:semantics});
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for (j = 0; j < tmp.length; j++) {
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elem.c('content', {name: tmp[j]}).up();
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}
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elem.up();
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}
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}
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// old bundle plan, to be removed
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var bundle = [];
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if (SDPUtil.find_line(this.session, 'a=group:BUNDLE')) {
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bundle = SDPUtil.find_line(this.session, 'a=group:BUNDLE ').split(' ');
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bundle.shift();
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}
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for (i = 0; i < this.media.length; i++) {
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mline = SDPUtil.parse_mline(this.media[i].split('\r\n')[0]);
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if (!(mline.media == 'audio' || mline.media == 'video')) {
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continue;
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}
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if (SDPUtil.find_line(this.media[i], 'a=ssrc:')) {
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ssrc = SDPUtil.find_line(this.media[i], 'a=ssrc:').substring(7).split(' ')[0]; // take the first
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} else {
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ssrc = false;
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}
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elem.c('content', {creator: thecreator, name: mline.media});
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if (SDPUtil.find_line(this.media[i], 'a=mid:')) {
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// prefer identifier from a=mid if present
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var mid = SDPUtil.parse_mid(SDPUtil.find_line(this.media[i], 'a=mid:'));
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elem.attrs({ name: mid });
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// old BUNDLE plan, to be removed
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if (bundle.indexOf(mid) != -1) {
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elem.c('bundle', {xmlns: 'http://estos.de/ns/bundle'}).up();
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bundle.splice(bundle.indexOf(mid), 1);
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}
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}
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if (SDPUtil.find_line(this.media[i], 'a=rtpmap:').length) {
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elem.c('description',
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{xmlns: 'urn:xmpp:jingle:apps:rtp:1',
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media: mline.media });
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if (ssrc) {
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elem.attrs({ssrc: ssrc});
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}
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for (j = 0; j < mline.fmt.length; j++) {
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rtpmap = SDPUtil.find_line(this.media[i], 'a=rtpmap:' + mline.fmt[j]);
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elem.c('payload-type', SDPUtil.parse_rtpmap(rtpmap));
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// put any 'a=fmtp:' + mline.fmt[j] lines into <param name=foo value=bar/>
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if (SDPUtil.find_line(this.media[i], 'a=fmtp:' + mline.fmt[j])) {
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tmp = SDPUtil.parse_fmtp(SDPUtil.find_line(this.media[i], 'a=fmtp:' + mline.fmt[j]));
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for (k = 0; k < tmp.length; k++) {
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elem.c('parameter', tmp[k]).up();
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}
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}
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this.RtcpFbToJingle(i, elem, mline.fmt[j]); // XEP-0293 -- map a=rtcp-fb
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elem.up();
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}
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if (SDPUtil.find_line(this.media[i], 'a=crypto:', this.session)) {
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elem.c('encryption', {required: 1});
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var crypto = SDPUtil.find_lines(this.media[i], 'a=crypto:', this.session);
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crypto.forEach(function(line) {
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elem.c('crypto', SDPUtil.parse_crypto(line)).up();
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});
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elem.up(); // end of encryption
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}
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if (ssrc) {
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// new style mapping
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elem.c('source', { ssrc: ssrc, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' });
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// FIXME: group by ssrc and support multiple different ssrcs
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var ssrclines = SDPUtil.find_lines(this.media[i], 'a=ssrc:');
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ssrclines.forEach(function(line) {
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idx = line.indexOf(' ');
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var linessrc = line.substr(0, idx).substr(7);
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if (linessrc != ssrc) {
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elem.up();
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ssrc = linessrc;
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elem.c('source', { ssrc: ssrc, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' });
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}
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var kv = line.substr(idx + 1);
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elem.c('parameter');
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if (kv.indexOf(':') == -1) {
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elem.attrs({ name: kv });
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} else {
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elem.attrs({ name: kv.split(':', 2)[0] });
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elem.attrs({ value: kv.split(':', 2)[1] });
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}
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elem.up();
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});
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elem.up();
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// old proprietary mapping, to be removed at some point
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tmp = SDPUtil.parse_ssrc(this.media[i]);
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tmp.xmlns = 'http://estos.de/ns/ssrc';
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tmp.ssrc = ssrc;
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elem.c('ssrc', tmp).up(); // ssrc is part of description
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}
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if (SDPUtil.find_line(this.media[i], 'a=rtcp-mux')) {
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elem.c('rtcp-mux').up();
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}
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// XEP-0293 -- map a=rtcp-fb:*
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this.RtcpFbToJingle(i, elem, '*');
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// XEP-0294
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if (SDPUtil.find_line(this.media[i], 'a=extmap:')) {
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lines = SDPUtil.find_lines(this.media[i], 'a=extmap:');
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for (j = 0; j < lines.length; j++) {
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tmp = SDPUtil.parse_extmap(lines[j]);
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elem.c('rtp-hdrext', { xmlns: 'urn:xmpp:jingle:apps:rtp:rtp-hdrext:0',
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uri: tmp.uri,
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id: tmp.value });
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if (tmp.hasOwnProperty('direction')) {
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switch (tmp.direction) {
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case 'sendonly':
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elem.attrs({senders: 'responder'});
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break;
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case 'recvonly':
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elem.attrs({senders: 'initiator'});
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break;
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case 'sendrecv':
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elem.attrs({senders: 'both'});
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break;
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case 'inactive':
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elem.attrs({senders: 'none'});
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break;
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}
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}
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// TODO: handle params
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elem.up();
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}
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}
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elem.up(); // end of description
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}
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// map ice-ufrag/pwd, dtls fingerprint, candidates
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this.TransportToJingle(i, elem);
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if (SDPUtil.find_line(this.media[i], 'a=sendrecv', this.session)) {
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elem.attrs({senders: 'both'});
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} else if (SDPUtil.find_line(this.media[i], 'a=sendonly', this.session)) {
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elem.attrs({senders: 'initiator'});
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} else if (SDPUtil.find_line(this.media[i], 'a=recvonly', this.session)) {
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elem.attrs({senders: 'responder'});
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} else if (SDPUtil.find_line(this.media[i], 'a=inactive', this.session)) {
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elem.attrs({senders: 'none'});
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}
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if (mline.port == '0') {
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// estos hack to reject an m-line
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elem.attrs({senders: 'rejected'});
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}
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elem.up(); // end of content
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}
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elem.up();
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return elem;
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};
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SDP.prototype.TransportToJingle = function (mediaindex, elem) {
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var i = mediaindex;
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var tmp;
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var self = this;
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elem.c('transport');
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// XEP-0320
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var fingerprints = SDPUtil.find_lines(this.media[mediaindex], 'a=fingerprint:', this.session);
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fingerprints.forEach(function(line) {
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tmp = SDPUtil.parse_fingerprint(line);
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tmp.xmlns = 'urn:xmpp:tmp:jingle:apps:dtls:0';
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// tmp.xmlns = 'urn:xmpp:jingle:apps:dtls:0'; -- FIXME: update receivers first
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elem.c('fingerprint').t(tmp.fingerprint);
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delete tmp.fingerprint;
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line = SDPUtil.find_line(self.media[mediaindex], 'a=setup:', self.session);
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if (line) {
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tmp.setup = line.substr(8);
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}
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elem.attrs(tmp);
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elem.up(); // end of fingerprint
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});
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tmp = SDPUtil.iceparams(this.media[mediaindex], this.session);
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if (tmp) {
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tmp.xmlns = 'urn:xmpp:jingle:transports:ice-udp:1';
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elem.attrs(tmp);
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// XEP-0176
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if (SDPUtil.find_line(this.media[mediaindex], 'a=candidate:', this.session)) { // add any a=candidate lines
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var lines = SDPUtil.find_lines(this.media[mediaindex], 'a=candidate:', this.session);
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lines.forEach(function (line) {
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elem.c('candidate', SDPUtil.candidateToJingle(line)).up();
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});
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}
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}
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elem.up(); // end of transport
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}
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SDP.prototype.RtcpFbToJingle = function (mediaindex, elem, payloadtype) { // XEP-0293
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var lines = SDPUtil.find_lines(this.media[mediaindex], 'a=rtcp-fb:' + payloadtype);
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lines.forEach(function (line) {
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var tmp = SDPUtil.parse_rtcpfb(line);
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if (tmp.type == 'trr-int') {
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elem.c('rtcp-fb-trr-int', {xmlns: 'urn:xmpp:jingle:apps:rtp:rtcp-fb:0', value: tmp.params[0]});
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elem.up();
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} else {
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elem.c('rtcp-fb', {xmlns: 'urn:xmpp:jingle:apps:rtp:rtcp-fb:0', type: tmp.type});
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if (tmp.params.length > 0) {
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elem.attrs({'subtype': tmp.params[0]});
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}
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elem.up();
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}
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});
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};
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SDP.prototype.RtcpFbFromJingle = function (elem, payloadtype) { // XEP-0293
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var media = '';
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var tmp = elem.find('>rtcp-fb-trr-int[xmlns="urn:xmpp:jingle:apps:rtp:rtcp-fb:0"]');
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if (tmp.length) {
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media += 'a=rtcp-fb:' + '*' + ' ' + 'trr-int' + ' ';
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if (tmp.attr('value')) {
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media += tmp.attr('value');
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} else {
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media += '0';
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}
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media += '\r\n';
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}
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tmp = elem.find('>rtcp-fb[xmlns="urn:xmpp:jingle:apps:rtp:rtcp-fb:0"]');
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tmp.each(function () {
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media += 'a=rtcp-fb:' + payloadtype + ' ' + $(this).attr('type');
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if ($(this).attr('subtype')) {
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media += ' ' + $(this).attr('subtype');
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}
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media += '\r\n';
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});
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return media;
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};
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// construct an SDP from a jingle stanza
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SDP.prototype.fromJingle = function (jingle) {
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var self = this;
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this.raw = 'v=0\r\n' +
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'o=- ' + '1923518516' + ' 2 IN IP4 0.0.0.0\r\n' +// FIXME
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's=-\r\n' +
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't=0 0\r\n';
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// http://tools.ietf.org/html/draft-ietf-mmusic-sdp-bundle-negotiation-04#section-8
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if ($(jingle).find('>group[xmlns="urn:xmpp:jingle:apps:grouping:0"]').length) {
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$(jingle).find('>group[xmlns="urn:xmpp:jingle:apps:grouping:0"]').each(function (idx, group) {
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var contents = $(group).find('>content').map(function (idx, content) {
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return content.getAttribute('name');
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}).get();
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if (contents.length > 0) {
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self.raw += 'a=group:' + (group.getAttribute('semantics') || group.getAttribute('type')) + ' ' + contents.join(' ') + '\r\n';
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}
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});
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} else if ($(jingle).find('>group[xmlns="urn:ietf:rfc:5888"]').length) {
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// temporary namespace, not to be used. to be removed soon.
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$(jingle).find('>group[xmlns="urn:ietf:rfc:5888"]').each(function (idx, group) {
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var contents = $(group).find('>content').map(function (idx, content) {
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return content.getAttribute('name');
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}).get();
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if (group.getAttribute('type') !== null && contents.length > 0) {
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self.raw += 'a=group:' + group.getAttribute('type') + ' ' + contents.join(' ') + '\r\n';
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}
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});
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} else {
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// for backward compability, to be removed soon
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// assume all contents are in the same bundle group, can be improved upon later
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var bundle = $(jingle).find('>content').filter(function (idx, content) {
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//elem.c('bundle', {xmlns:'http://estos.de/ns/bundle'});
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return $(content).find('>bundle').length > 0;
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}).map(function (idx, content) {
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return content.getAttribute('name');
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}).get();
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if (bundle.length) {
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this.raw += 'a=group:BUNDLE ' + bundle.join(' ') + '\r\n';
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}
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}
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this.session = this.raw;
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jingle.find('>content').each(function () {
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var m = self.jingle2media($(this));
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self.media.push(m);
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});
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// reconstruct msid-semantic -- apparently not necessary
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/*
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var msid = SDPUtil.parse_ssrc(this.raw);
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if (msid.hasOwnProperty('mslabel')) {
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this.session += "a=msid-semantic: WMS " + msid.mslabel + "\r\n";
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}
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*/
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this.raw = this.session + this.media.join('');
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};
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// translate a jingle content element into an an SDP media part
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SDP.prototype.jingle2media = function (content) {
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var media = '',
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desc = content.find('description'),
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ssrc = desc.attr('ssrc'),
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self = this,
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tmp;
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tmp = { media: desc.attr('media') };
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tmp.port = '1';
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if (content.attr('senders') == 'rejected') {
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// estos hack to reject an m-line.
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tmp.port = '0';
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}
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if (content.find('>transport>fingerprint').length || desc.find('encryption').length) {
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tmp.proto = 'RTP/SAVPF';
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} else {
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tmp.proto = 'RTP/AVPF';
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}
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tmp.fmt = desc.find('payload-type').map(function () { return this.getAttribute('id'); }).get();
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media += SDPUtil.build_mline(tmp) + '\r\n';
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media += 'c=IN IP4 0.0.0.0\r\n';
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media += 'a=rtcp:1 IN IP4 0.0.0.0\r\n';
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tmp = content.find('>transport[xmlns="urn:xmpp:jingle:transports:ice-udp:1"]');
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if (tmp.length) {
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if (tmp.attr('ufrag')) {
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media += SDPUtil.build_iceufrag(tmp.attr('ufrag')) + '\r\n';
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}
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if (tmp.attr('pwd')) {
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media += SDPUtil.build_icepwd(tmp.attr('pwd')) + '\r\n';
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}
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tmp.find('>fingerprint').each(function () {
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// FIXME: check namespace at some point
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media += 'a=fingerprint:' + this.getAttribute('hash');
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media += ' ' + $(this).text();
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media += '\r\n';
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if (this.getAttribute('setup')) {
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media += 'a=setup:' + this.getAttribute('setup') + '\r\n';
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}
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});
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}
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switch (content.attr('senders')) {
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case 'initiator':
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media += 'a=sendonly\r\n';
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break;
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case 'responder':
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media += 'a=recvonly\r\n';
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break;
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case 'none':
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media += 'a=inactive\r\n';
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break;
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case 'both':
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media += 'a=sendrecv\r\n';
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break;
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}
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media += 'a=mid:' + content.attr('name') + '\r\n';
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// <description><rtcp-mux/></description>
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// see http://code.google.com/p/libjingle/issues/detail?id=309 -- no spec though
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// and http://mail.jabber.org/pipermail/jingle/2011-December/001761.html
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if (desc.find('rtcp-mux').length) {
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media += 'a=rtcp-mux\r\n';
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}
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|
if (desc.find('encryption').length) {
|
|
desc.find('encryption>crypto').each(function () {
|
|
media += 'a=crypto:' + this.getAttribute('tag');
|
|
media += ' ' + this.getAttribute('crypto-suite');
|
|
media += ' ' + this.getAttribute('key-params');
|
|
if (this.getAttribute('session-params')) {
|
|
media += ' ' + this.getAttribute('session-params');
|
|
}
|
|
media += '\r\n';
|
|
});
|
|
}
|
|
desc.find('payload-type').each(function () {
|
|
media += SDPUtil.build_rtpmap(this) + '\r\n';
|
|
if ($(this).find('>parameter').length) {
|
|
media += 'a=fmtp:' + this.getAttribute('id') + ' ';
|
|
media += $(this).find('parameter').map(function () { return (this.getAttribute('name') ? (this.getAttribute('name') + '=') : '') + this.getAttribute('value'); }).get().join(';');
|
|
media += '\r\n';
|
|
}
|
|
// xep-0293
|
|
media += self.RtcpFbFromJingle($(this), this.getAttribute('id'));
|
|
});
|
|
|
|
// xep-0293
|
|
media += self.RtcpFbFromJingle(desc, '*');
|
|
|
|
// xep-0294
|
|
tmp = desc.find('>rtp-hdrext[xmlns="urn:xmpp:jingle:apps:rtp:rtp-hdrext:0"]');
|
|
tmp.each(function () {
|
|
media += 'a=extmap:' + this.getAttribute('id') + ' ' + this.getAttribute('uri') + '\r\n';
|
|
});
|
|
|
|
content.find('>transport[xmlns="urn:xmpp:jingle:transports:ice-udp:1"]>candidate').each(function () {
|
|
media += SDPUtil.candidateFromJingle(this);
|
|
});
|
|
|
|
tmp = content.find('description>source[xmlns="urn:xmpp:jingle:apps:rtp:ssma:0"]');
|
|
tmp.each(function () {
|
|
var ssrc = this.getAttribute('ssrc');
|
|
$(this).find('>parameter').each(function () {
|
|
media += 'a=ssrc:' + ssrc + ' ' + this.getAttribute('name');
|
|
if (this.getAttribute('value') && this.getAttribute('value').length)
|
|
media += ':' + this.getAttribute('value');
|
|
media += '\r\n';
|
|
});
|
|
});
|
|
|
|
if (tmp.length === 0) {
|
|
// fallback to proprietary mapping of a=ssrc lines
|
|
tmp = content.find('description>ssrc[xmlns="http://estos.de/ns/ssrc"]');
|
|
if (tmp.length) {
|
|
media += 'a=ssrc:' + ssrc + ' cname:' + tmp.attr('cname') + '\r\n';
|
|
media += 'a=ssrc:' + ssrc + ' msid:' + tmp.attr('msid') + '\r\n';
|
|
media += 'a=ssrc:' + ssrc + ' mslabel:' + tmp.attr('mslabel') + '\r\n';
|
|
media += 'a=ssrc:' + ssrc + ' label:' + tmp.attr('label') + '\r\n';
|
|
}
|
|
}
|
|
return media;
|
|
};
|
|
|
|
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;
|
|
},
|
|
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;
|
|
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;
|
|
}
|
|
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.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];
|
|
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;
|
|
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;
|
|
}
|
|
line += 'generation';
|
|
line += ' ';
|
|
line += cand.getAttribute('generation') || '0';
|
|
return line + '\r\n';
|
|
}
|
|
};
|