blob: 062f75c3feb1fffc300944144719eee5238a7942 [file] [log] [blame]
/*
* 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 RTC_BASE_SOCKETADAPTERS_H_
#define RTC_BASE_SOCKETADAPTERS_H_
#include <string>
#include "rtc_base/asyncsocket.h"
#include "rtc_base/constructormagic.h"
#include "rtc_base/cryptstring.h"
namespace rtc {
struct HttpAuthContext;
class ByteBufferReader;
class ByteBufferWriter;
///////////////////////////////////////////////////////////////////////////////
// Implements a socket adapter that can buffer and process data internally,
// as in the case of connecting to a proxy, where you must speak the proxy
// protocol before commencing normal socket behavior.
class BufferedReadAdapter : public AsyncSocketAdapter {
public:
BufferedReadAdapter(AsyncSocket* socket, size_t buffer_size);
~BufferedReadAdapter() override;
int Send(const void* pv, size_t cb) override;
int Recv(void* pv, size_t cb, int64_t* timestamp) override;
protected:
int DirectSend(const void* pv, size_t cb) {
return AsyncSocketAdapter::Send(pv, cb);
}
void BufferInput(bool on = true);
virtual void ProcessInput(char* data, size_t* len) = 0;
void OnReadEvent(AsyncSocket* socket) override;
private:
char* buffer_;
size_t buffer_size_, data_len_;
bool buffering_;
RTC_DISALLOW_COPY_AND_ASSIGN(BufferedReadAdapter);
};
///////////////////////////////////////////////////////////////////////////////
// Interface for implementing proxy server sockets.
class AsyncProxyServerSocket : public BufferedReadAdapter {
public:
AsyncProxyServerSocket(AsyncSocket* socket, size_t buffer_size);
~AsyncProxyServerSocket() override;
sigslot::signal2<AsyncProxyServerSocket*, const SocketAddress&>
SignalConnectRequest;
virtual void SendConnectResult(int err, const SocketAddress& addr) = 0;
};
///////////////////////////////////////////////////////////////////////////////
// Implements a socket adapter that performs the client side of a
// fake SSL handshake. Used for "ssltcp" P2P functionality.
class AsyncSSLSocket : public BufferedReadAdapter {
public:
explicit AsyncSSLSocket(AsyncSocket* socket);
int Connect(const SocketAddress& addr) override;
protected:
void OnConnectEvent(AsyncSocket* socket) override;
void ProcessInput(char* data, size_t* len) override;
RTC_DISALLOW_COPY_AND_ASSIGN(AsyncSSLSocket);
};
// Implements a socket adapter that performs the server side of a
// fake SSL handshake. Used when implementing a relay server that does "ssltcp".
class AsyncSSLServerSocket : public BufferedReadAdapter {
public:
explicit AsyncSSLServerSocket(AsyncSocket* socket);
protected:
void ProcessInput(char* data, size_t* len) override;
RTC_DISALLOW_COPY_AND_ASSIGN(AsyncSSLServerSocket);
};
///////////////////////////////////////////////////////////////////////////////
// Implements a socket adapter that speaks the HTTP/S proxy protocol.
class AsyncHttpsProxySocket : public BufferedReadAdapter {
public:
AsyncHttpsProxySocket(AsyncSocket* socket,
const std::string& user_agent,
const SocketAddress& proxy,
const std::string& username,
const CryptString& password);
~AsyncHttpsProxySocket() override;
// If connect is forced, the adapter will always issue an HTTP CONNECT to the
// target address. Otherwise, it will connect only if the destination port
// is not port 80.
void SetForceConnect(bool force) { force_connect_ = force; }
int Connect(const SocketAddress& addr) override;
SocketAddress GetRemoteAddress() const override;
int Close() override;
ConnState GetState() const override;
protected:
void OnConnectEvent(AsyncSocket* socket) override;
void OnCloseEvent(AsyncSocket* socket, int err) override;
void ProcessInput(char* data, size_t* len) override;
bool ShouldIssueConnect() const;
void SendRequest();
void ProcessLine(char* data, size_t len);
void EndResponse();
void Error(int error);
private:
SocketAddress proxy_, dest_;
std::string agent_, user_, headers_;
CryptString pass_;
bool force_connect_;
size_t content_length_;
int defer_error_;
bool expect_close_;
enum ProxyState {
PS_INIT,
PS_LEADER,
PS_AUTHENTICATE,
PS_SKIP_HEADERS,
PS_ERROR_HEADERS,
PS_TUNNEL_HEADERS,
PS_SKIP_BODY,
PS_TUNNEL,
PS_WAIT_CLOSE,
PS_ERROR
} state_;
HttpAuthContext* context_;
std::string unknown_mechanisms_;
RTC_DISALLOW_COPY_AND_ASSIGN(AsyncHttpsProxySocket);
};
///////////////////////////////////////////////////////////////////////////////
// Implements a socket adapter that speaks the SOCKS proxy protocol.
class AsyncSocksProxySocket : public BufferedReadAdapter {
public:
AsyncSocksProxySocket(AsyncSocket* socket,
const SocketAddress& proxy,
const std::string& username,
const CryptString& password);
~AsyncSocksProxySocket() override;
int Connect(const SocketAddress& addr) override;
SocketAddress GetRemoteAddress() const override;
int Close() override;
ConnState GetState() const override;
protected:
void OnConnectEvent(AsyncSocket* socket) override;
void ProcessInput(char* data, size_t* len) override;
void SendHello();
void SendConnect();
void SendAuth();
void Error(int error);
private:
enum State { SS_INIT, SS_HELLO, SS_AUTH, SS_CONNECT, SS_TUNNEL, SS_ERROR };
State state_;
SocketAddress proxy_, dest_;
std::string user_;
CryptString pass_;
RTC_DISALLOW_COPY_AND_ASSIGN(AsyncSocksProxySocket);
};
// Implements a proxy server socket for the SOCKS protocol.
class AsyncSocksProxyServerSocket : public AsyncProxyServerSocket {
public:
explicit AsyncSocksProxyServerSocket(AsyncSocket* socket);
private:
void ProcessInput(char* data, size_t* len) override;
void DirectSend(const ByteBufferWriter& buf);
void HandleHello(ByteBufferReader* request);
void SendHelloReply(uint8_t method);
void HandleAuth(ByteBufferReader* request);
void SendAuthReply(uint8_t result);
void HandleConnect(ByteBufferReader* request);
void SendConnectResult(int result, const SocketAddress& addr) override;
void Error(int error);
static const int kBufferSize = 1024;
enum State {
SS_HELLO,
SS_AUTH,
SS_CONNECT,
SS_CONNECT_PENDING,
SS_TUNNEL,
SS_ERROR
};
State state_;
RTC_DISALLOW_COPY_AND_ASSIGN(AsyncSocksProxyServerSocket);
};
} // namespace rtc
#endif // RTC_BASE_SOCKETADAPTERS_H_