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* 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.
#include <string>
#include "webrtc/base/sigslot.h"
namespace rtc {
class SocketAddress;
namespace buzz {
class AsyncSocket {
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
STATE_TLS_CONNECTING, //!< Establishing TLS connection
STATE_TLS_OPEN, //!< TLS connected
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
ERROR_SSL, //!< Something went wrong with OpenSSL
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;
// 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;
sigslot::signal0<> SignalConnected;
sigslot::signal0<> SignalSSLConnected;
sigslot::signal0<> SignalClosed;
sigslot::signal0<> SignalRead;
sigslot::signal0<> SignalError;