SCTP: Stopped accepting SSRCs higher than max.

talk/media/sctp/sctpdataengine.cc

 /*
  * libjingle
  * Copyright 2012 Google Inc. and Robin Seggelmann
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 711 matching lines @@
                     << " len=" << buffer->size() << " before SetReceive(true).";
   }
 }
 
 bool SctpDataMediaChannel::AddStream(const StreamParams& stream) {
   if (!stream.has_ssrcs()) {
     return false;
   }
 
   const uint32_t ssrc = stream.first_ssrc();
-  if (open_streams_.find(ssrc) != open_streams_.end()) {
+  if (ssrc >= cricket::kMaxSctpSid) {
     LOG(LS_WARNING) << debug_name_ << "->Add(Send|Recv)Stream(...): "
                     << "Not adding data stream '" << stream.id
                     << "' with ssrc=" << ssrc
+                    << " because stream ssrc is too high.";
+    return false;
+  } else if (open_streams_.find(ssrc) != open_streams_.end()) {
+    LOG(LS_WARNING) << debug_name_ << "->Add(Send|Recv)Stream(...): "
+                    << "Not adding data stream '" << stream.id
+                    << "' with ssrc=" << ssrc
                     << " because stream is already open.";
     return false;
   } else if (queued_reset_streams_.find(ssrc) != queued_reset_streams_.end()
              || sent_reset_streams_.find(ssrc) != sent_reset_streams_.end()) {
     LOG(LS_WARNING) << debug_name_ << "->Add(Send|Recv)Stream(...): "
                     << "Not adding data stream '" << stream.id
                     << "' with ssrc=" << ssrc
                     << " because stream is still closing.";
     return false;
   }
@@ skipping 292 matching lines @@
     }
     case MSG_SCTPOUTBOUNDPACKET: {
       rtc::scoped_ptr<OutboundPacketMessage> pdata(
           static_cast<OutboundPacketMessage*>(msg->pdata));
       OnPacketFromSctpToNetwork(pdata->data().get());
       break;
     }
   }
 }
 }  // namespace cricket