Modify PeerConnection for end-to-end QuicDataChannel usage

webrtc/api/webrtcsdp.cc

 /*
  *  Copyright 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 133 matching lines @@
 static const char kAttributeRtcpFb[] = "rtcp-fb";
 static const char kAttributeSendRecv[] = "sendrecv";
 static const char kAttributeInactive[] = "inactive";
 // draft-ietf-mmusic-sctp-sdp-07
 // a=sctp-port
 static const char kAttributeSctpPort[] = "sctp-port";
 
 // Experimental flags
 static const char kAttributeXGoogleFlag[] = "x-google-flag";
 static const char kValueConference[] = "conference";
+static const char kAttributeQuic[] = "quic";

[Taylor Brandstetter, 2016/04/01 23:23:42]

Does it make sense for this to be an attribute? I think it would make more sense
as a profile string. Instead of "UDP/TLS/RTP/SAVPF" we could use "UDP/QUIC".

 
 // Candidate
 static const char kCandidateHost[] = "host";
 static const char kCandidateSrflx[] = "srflx";
 static const char kCandidatePrflx[] = "prflx";
 static const char kCandidateRelay[] = "relay";
 static const char kTcpCandidateType[] = "tcptype";
 
 static const char kSdpDelimiterEqual = '=';
 static const char kSdpDelimiterSpace = ' ';
@@ skipping 649 matching lines @@
       kSessionOriginSessionVersion : jdesc.session_version();
   os << " " << session_id << " " << session_version << " "
      << kSessionOriginNettype << " " << kSessionOriginAddrtype << " "
      << kSessionOriginAddress;
   AddLine(os.str(), &message);
   AddLine(kSessionName, &message);
 
   // Time Description.
   AddLine(kTimeDescription, &message);
 
+  // QUIC Description.
+  if (desc->quic()) {
+    AddLine("a=quic", &message);

[Taylor Brandstetter, 2016/04/01 23:23:42]

Replace this with:
     InitAttrLine(kAttributeQuic, &os);
     AddLine(os.str(), &message);

+  }
+
   // Group
   if (desc->HasGroup(cricket::GROUP_TYPE_BUNDLE)) {
     std::string group_line = kAttrGroup;
     const cricket::ContentGroup* group =
         desc->GetGroupByName(cricket::GROUP_TYPE_BUNDLE);
     ASSERT(group != NULL);
     const cricket::ContentNames& content_names = group->content_names();
     for (cricket::ContentNames::const_iterator it = content_names.begin();
          it != content_names.end(); ++it) {
       group_line.append(" ");
@@ skipping 1164 matching lines @@
         return false;
       }
       desc->set_msid_supported(
           CaseInsensitiveFind(semantics, kMediaStreamSemantic));
     } else if (HasAttribute(line, kAttributeExtmap)) {
       RtpHeaderExtension extmap;
       if (!ParseExtmap(line, &extmap, error)) {
         return false;
       }
       session_extmaps->push_back(extmap);
+    } else if (HasAttribute(line, kAttributeQuic)) {
+      desc->set_quic(true);
     }
   }
 
   return true;
 }
 
 bool ParseGroupAttribute(const std::string& line,
                          cricket::SessionDescription* desc,
                          SdpParseError* error) {
   ASSERT(desc != NULL);
@@ skipping 1139 matching lines @@
     UpdateCodec<AudioContentDescription, cricket::AudioCodec>(
         media_desc, payload_type, feedback_param);
   } else if (media_type == cricket::MEDIA_TYPE_VIDEO) {
     UpdateCodec<VideoContentDescription, cricket::VideoCodec>(
         media_desc, payload_type, feedback_param);
   }
   return true;
 }
 
 }  // namespace webrtc