Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmpp/asyncsocket.h

Index: webrtc/libjingle/xmpp/asyncsocket.h
diff --git a/webrtc/libjingle/xmpp/asyncsocket.h b/webrtc/libjingle/xmpp/asyncsocket.h
new file mode 100644
index 0000000000000000000000000000000000000000..6d77ce0842ca0fe9313415557b74903d2152503b
--- /dev/null
+++ b/webrtc/libjingle/xmpp/asyncsocket.h
@@ -0,0 +1,72 @@
+/*
+ *  Copyright 2004 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.
+ */
+
+#ifndef WEBRTC_LIBJINGLE_XMPP_ASYNCSOCKET_H_
+#define WEBRTC_LIBJINGLE_XMPP_ASYNCSOCKET_H_
+
+#include <string>
+
+#include "webrtc/base/sigslot.h"
+
+namespace rtc {
+  class SocketAddress;
+}
+
+namespace buzz {
+
+class AsyncSocket {
+public:
+  enum State {
+    STATE_CLOSED = 0,      //!< Socket is not open.
+    STATE_CLOSING,         //!< Socket is closing but can have buffered data
+    STATE_CONNECTING,      //!< In the process of
+    STATE_OPEN,            //!< Socket is connected
+#if defined(FEATURE_ENABLE_SSL)
+    STATE_TLS_CONNECTING,  //!< Establishing TLS connection
+    STATE_TLS_OPEN,        //!< TLS connected
+#endif
+  };
+
+  enum Error {
+    ERROR_NONE = 0,         //!< No error
+    ERROR_WINSOCK,          //!< Winsock error
+    ERROR_DNS,              //!< Couldn't resolve host name
+    ERROR_WRONGSTATE,       //!< Call made while socket is in the wrong state
+#if defined(FEATURE_ENABLE_SSL)
+    ERROR_SSL,              //!< Something went wrong with OpenSSL
+#endif
+  };
+
+  virtual ~AsyncSocket() {}
+  virtual State state() = 0;
+  virtual Error error() = 0;
+  virtual int GetError() = 0;    // winsock error code
+
+  virtual bool Connect(const rtc::SocketAddress& addr) = 0;
+  virtual bool Read(char * data, size_t len, size_t* len_read) = 0;
+  virtual bool Write(const char * data, size_t len) = 0;
+  virtual bool Close() = 0;
+#if defined(FEATURE_ENABLE_SSL)
+  // We allow matching any passed domain.  This allows us to avoid
+  // handling the valuable certificates for logins into proxies.  If
+  // both names are passed as empty, we do not require a match.
+  virtual bool StartTls(const std::string & domainname) = 0;
+#endif
+
+  sigslot::signal0<> SignalConnected;
+  sigslot::signal0<> SignalSSLConnected;
+  sigslot::signal0<> SignalClosed;
+  sigslot::signal0<> SignalRead;
+  sigslot::signal0<> SignalError;
+};
+
+}
+
+#endif  // WEBRTC_LIBJINGLE_XMPP_ASYNCSOCKET_H_