pRevert 5371 "Revert 5367 "Update talk to 59410372.""

> Revert 5367 "Update talk to 59410372."
> 
> > Update talk to 59410372.
> > 
> > R=jiayl@webrtc.org, wu@webrtc.org
> > 
> > Review URL: https://webrtc-codereview.appspot.com/6929004
> 
> TBR=mallinath@webrtc.org
> 
> Review URL: https://webrtc-codereview.appspot.com/6999004

TBR=henrika@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/7109004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5381 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/app/webrtc/sctputils.h b/talk/app/webrtc/sctputils.h
new file mode 100644
index 0000000..d0b4e9c
--- /dev/null
+++ b/talk/app/webrtc/sctputils.h
@@ -0,0 +1,55 @@
+/*
+ * libjingle
+ * Copyright 2013 Google Inc.
+ *
+ * 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,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef TALK_APP_WEBRTC_SCTPUTILS_H_
+#define TALK_APP_WEBRTC_SCTPUTILS_H_
+
+#include <string>
+
+#include "talk/app/webrtc/datachannelinterface.h"
+
+namespace talk_base {
+class Buffer;
+}  // namespace talk_base
+
+namespace webrtc {
+struct DataChannelInit;
+
+bool ParseDataChannelOpenMessage(const talk_base::Buffer& payload,
+                                 std::string* label,
+                                 DataChannelInit* config);
+
+bool ParseDataChannelOpenAckMessage(const talk_base::Buffer& payload);
+
+bool WriteDataChannelOpenMessage(const std::string& label,
+                                 const DataChannelInit& config,
+                                 talk_base::Buffer* payload);
+
+void WriteDataChannelOpenAckMessage(talk_base::Buffer* payload);
+}  // namespace webrtc
+
+#endif  // TALK_APP_WEBRTC_SCTPUTILS_H_