1 /* 2 * libjingle 3 * Copyright 2004--2005, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_BASE_SCHANNELADAPTER_H__ 29 #define TALK_BASE_SCHANNELADAPTER_H__ 30 31 #include <string> 32 #include "talk/base/ssladapter.h" 33 #include "talk/base/messagequeue.h" 34 struct _SecBufferDesc; 35 36 namespace talk_base { 37 38 /////////////////////////////////////////////////////////////////////////////// 39 40 class SChannelAdapter : public SSLAdapter, public MessageHandler { 41 public: 42 SChannelAdapter(AsyncSocket* socket); 43 virtual ~SChannelAdapter(); 44 45 virtual int StartSSL(const char* hostname, bool restartable); 46 virtual int Send(const void* pv, size_t cb); 47 virtual int Recv(void* pv, size_t cb); 48 virtual int Close(); 49 50 // Note that the socket returns ST_CONNECTING while SSL is being negotiated. 51 virtual ConnState GetState() const; 52 53 protected: 54 enum SSLState { 55 SSL_NONE, SSL_WAIT, SSL_CONNECTING, SSL_CONNECTED, SSL_ERROR 56 }; 57 struct SSLImpl; 58 59 virtual void OnConnectEvent(AsyncSocket* socket); 60 virtual void OnReadEvent(AsyncSocket* socket); 61 virtual void OnWriteEvent(AsyncSocket* socket); 62 virtual void OnCloseEvent(AsyncSocket* socket, int err); 63 virtual void OnMessage(Message* pmsg); 64 65 int BeginSSL(); 66 int ContinueSSL(); 67 int ProcessContext(long int status, _SecBufferDesc* sbd_in, 68 _SecBufferDesc* sbd_out); 69 int DecryptData(); 70 71 int Read(); 72 int Flush(); 73 void Error(const char* context, int err, bool signal = true); 74 void Cleanup(); 75 76 void PostEvent(); 77 78 private: 79 SSLState state_; 80 std::string ssl_host_name_; 81 // If true, socket will retain SSL configuration after Close. 82 bool restartable_; 83 // If true, we are delaying signalling close until all data is read. 84 bool signal_close_; 85 // If true, we are waiting to be woken up to signal readability or closure. 86 bool message_pending_; 87 SSLImpl* impl_; 88 }; 89 90 ///////////////////////////////////////////////////////////////////////////// 91 92 } // namespace talk_base 93 94 #endif // TALK_BASE_SCHANNELADAPTER_H__ 95