Removing HTTPS and SOCKS proxy server code.

webrtc/base/socketadapters.cc

 /*
  *  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.
  */
 
@@ skipping 10 matching lines @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #define SECURITY_WIN32
 #include <security.h>
 #endif
 
 #include <algorithm>
 
 #include "webrtc/base/bytebuffer.h"
 #include "webrtc/base/checks.h"
-#include "webrtc/base/httpcommon.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/socketadapters.h"
 #include "webrtc/base/stringencode.h"
 #include "webrtc/base/stringutils.h"
 
 namespace rtc {
 
 BufferedReadAdapter::BufferedReadAdapter(AsyncSocket* socket, size_t size)
     : AsyncSocketAdapter(socket), buffer_size_(size),
       data_len_(0), buffering_(false) {
@@ skipping 193 matching lines @@
   // Clients should not send more data until the handshake is completed.
   RTC_DCHECK(*len == 0);
 
   // Send a server hello back to the client.
   DirectSend(kSslServerHello, sizeof(kSslServerHello));
 
   // Handshake completed for us, redirect input to our parent.
   BufferInput(false);
 }
 
-///////////////////////////////////////////////////////////////////////////////
-
-AsyncHttpsProxySocket::AsyncHttpsProxySocket(AsyncSocket* socket,
-                                             const std::string& user_agent,
-                                             const SocketAddress& proxy,
-                                             const std::string& username,
-                                             const CryptString& password)
-  : BufferedReadAdapter(socket, 1024), proxy_(proxy), agent_(user_agent),
-    user_(username), pass_(password), force_connect_(false), state_(PS_ERROR),
-    context_(0) {
-}
-
-AsyncHttpsProxySocket::~AsyncHttpsProxySocket() {
-  delete context_;
-}
-
-int AsyncHttpsProxySocket::Connect(const SocketAddress& addr) {
-  int ret;
-  LOG(LS_VERBOSE) << "AsyncHttpsProxySocket::Connect("
-                  << proxy_.ToSensitiveString() << ")";
-  dest_ = addr;
-  state_ = PS_INIT;
-  if (ShouldIssueConnect()) {
-    BufferInput(true);
-  }
-  ret = BufferedReadAdapter::Connect(proxy_);
-  // TODO: Set state_ appropriately if Connect fails.
-  return ret;
-}
-
-SocketAddress AsyncHttpsProxySocket::GetRemoteAddress() const {
-  return dest_;
-}
-
-int AsyncHttpsProxySocket::Close() {
-  headers_.clear();
-  state_ = PS_ERROR;
-  dest_.Clear();
-  delete context_;
-  context_ = nullptr;
-  return BufferedReadAdapter::Close();
-}
-
-Socket::ConnState AsyncHttpsProxySocket::GetState() const {
-  if (state_ < PS_TUNNEL) {
-    return CS_CONNECTING;
-  } else if (state_ == PS_TUNNEL) {
-    return CS_CONNECTED;
-  } else {
-    return CS_CLOSED;
-  }
-}
-
-void AsyncHttpsProxySocket::OnConnectEvent(AsyncSocket * socket) {
-  LOG(LS_VERBOSE) << "AsyncHttpsProxySocket::OnConnectEvent";
-  if (!ShouldIssueConnect()) {
-    state_ = PS_TUNNEL;
-    BufferedReadAdapter::OnConnectEvent(socket);
-    return;
-  }
-  SendRequest();
-}
-
-void AsyncHttpsProxySocket::OnCloseEvent(AsyncSocket * socket, int err) {
-  LOG(LS_VERBOSE) << "AsyncHttpsProxySocket::OnCloseEvent(" << err << ")";
-  if ((state_ == PS_WAIT_CLOSE) && (err == 0)) {
-    state_ = PS_ERROR;
-    Connect(dest_);
-  } else {
-    BufferedReadAdapter::OnCloseEvent(socket, err);
-  }
-}
-
-void AsyncHttpsProxySocket::ProcessInput(char* data, size_t* len) {
-  size_t start = 0;
-  for (size_t pos = start; state_ < PS_TUNNEL && pos < *len;) {
-    if (state_ == PS_SKIP_BODY) {
-      size_t consume = std::min(*len - pos, content_length_);
-      pos += consume;
-      start = pos;
-      content_length_ -= consume;
-      if (content_length_ == 0) {
-        EndResponse();
-      }
-      continue;
-    }
-
-    if (data[pos++] != '\n')
-      continue;
-
-    size_t len = pos - start - 1;
-    if ((len > 0) && (data[start + len - 1] == '\r'))
-      --len;
-
-    data[start + len] = 0;
-    ProcessLine(data + start, len);
-    start = pos;
-  }
-
-  *len -= start;
-  if (*len > 0) {
-    memmove(data, data + start, *len);
-  }
-
-  if (state_ != PS_TUNNEL)
-    return;
-
-  bool remainder = (*len > 0);
-  BufferInput(false);
-  SignalConnectEvent(this);
-
-  // FIX: if SignalConnect causes the socket to be destroyed, we are in trouble
-  if (remainder)
-    SignalReadEvent(this);  // TODO: signal this??
-}
-
-bool AsyncHttpsProxySocket::ShouldIssueConnect() const {
-  // TODO: Think about whether a more sophisticated test
-  // than dest port == 80 is needed.
-  return force_connect_ || (dest_.port() != 80);
-}
-
-void AsyncHttpsProxySocket::SendRequest() {
-  std::stringstream ss;
-  ss << "CONNECT " << dest_.ToString() << " HTTP/1.0\r\n";
-  ss << "User-Agent: " << agent_ << "\r\n";
-  ss << "Host: " << dest_.HostAsURIString() << "\r\n";
-  ss << "Content-Length: 0\r\n";
-  ss << "Proxy-Connection: Keep-Alive\r\n";
-  ss << headers_;
-  ss << "\r\n";
-  std::string str = ss.str();
-  DirectSend(str.c_str(), str.size());
-  state_ = PS_LEADER;
-  expect_close_ = true;
-  content_length_ = 0;
-  headers_.clear();
-
-  LOG(LS_VERBOSE) << "AsyncHttpsProxySocket >> " << str;
-}
-
-void AsyncHttpsProxySocket::ProcessLine(char * data, size_t len) {
-  LOG(LS_VERBOSE) << "AsyncHttpsProxySocket << " << data;
-
-  if (len == 0) {
-    if (state_ == PS_TUNNEL_HEADERS) {
-      state_ = PS_TUNNEL;
-    } else if (state_ == PS_ERROR_HEADERS) {
-      Error(defer_error_);
-      return;
-    } else if (state_ == PS_SKIP_HEADERS) {
-      if (content_length_) {
-        state_ = PS_SKIP_BODY;
-      } else {
-        EndResponse();
-        return;
-      }
-    } else {
-      static bool report = false;
-      if (!unknown_mechanisms_.empty() && !report) {
-        report = true;
-        std::string msg(
-          "Unable to connect to the Google Talk service due to an incompatibility "
-          "with your proxy.\r\nPlease help us resolve this issue by submitting the "
-          "following information to us using our technical issue submission form "
-          "at:\r\n\r\n"
-          "http://www.google.com/support/talk/bin/request.py\r\n\r\n"
-          "We apologize for the inconvenience.\r\n\r\n"
-          "Information to submit to Google: "
-          );
-        //std::string msg("Please report the following information to foo@bar.com:\r\nUnknown methods: ");
-        msg.append(unknown_mechanisms_);
-#if defined(WEBRTC_WIN)
-        MessageBoxA(0, msg.c_str(), "Oops!", MB_OK);
-#endif
-#if defined(WEBRTC_POSIX)
-        // TODO: Raise a signal so the UI can be separated.
-        LOG(LS_ERROR) << "Oops!\n\n" << msg;
-#endif
-      }
-      // Unexpected end of headers
-      Error(0);
-      return;
-    }
-  } else if (state_ == PS_LEADER) {
-    unsigned int code;
-    if (sscanf(data, "HTTP/%*u.%*u %u", &code) != 1) {
-      Error(0);
-      return;
-    }
-    switch (code) {
-    case 200:
-      // connection good!
-      state_ = PS_TUNNEL_HEADERS;
-      return;
-#if defined(HTTP_STATUS_PROXY_AUTH_REQ) && (HTTP_STATUS_PROXY_AUTH_REQ != 407)
-#error Wrong code for HTTP_STATUS_PROXY_AUTH_REQ
-#endif
-    case 407:  // HTTP_STATUS_PROXY_AUTH_REQ
-      state_ = PS_AUTHENTICATE;
-      return;
-    default:
-      defer_error_ = 0;
-      state_ = PS_ERROR_HEADERS;
-      return;
-    }
-  } else if ((state_ == PS_AUTHENTICATE)
-             && (_strnicmp(data, "Proxy-Authenticate:", 19) == 0)) {
-    std::string response, auth_method;
-    switch (HttpAuthenticate(data + 19, len - 19,
-                             proxy_, "CONNECT", "/",
-                             user_, pass_, context_, response, auth_method)) {
-    case HAR_IGNORE:
-      LOG(LS_VERBOSE) << "Ignoring Proxy-Authenticate: " << auth_method;
-      if (!unknown_mechanisms_.empty())
-        unknown_mechanisms_.append(", ");
-      unknown_mechanisms_.append(auth_method);
-      break;
-    case HAR_RESPONSE:
-      headers_ = "Proxy-Authorization: ";
-      headers_.append(response);
-      headers_.append("\r\n");
-      state_ = PS_SKIP_HEADERS;
-      unknown_mechanisms_.clear();
-      break;
-    case HAR_CREDENTIALS:
-      defer_error_ = SOCKET_EACCES;
-      state_ = PS_ERROR_HEADERS;
-      unknown_mechanisms_.clear();
-      break;
-    case HAR_ERROR:
-      defer_error_ = 0;
-      state_ = PS_ERROR_HEADERS;
-      unknown_mechanisms_.clear();
-      break;
-    }
-  } else if (_strnicmp(data, "Content-Length:", 15) == 0) {
-    content_length_ = strtoul(data + 15, 0, 0);
-  } else if (_strnicmp(data, "Proxy-Connection: Keep-Alive", 28) == 0) {
-    expect_close_ = false;
-    /*
-  } else if (_strnicmp(data, "Connection: close", 17) == 0) {
-    expect_close_ = true;
-    */
-  }
-}
-
-void AsyncHttpsProxySocket::EndResponse() {
-  if (!expect_close_) {
-    SendRequest();
-    return;
-  }
-
-  // No point in waiting for the server to close... let's close now
-  // TODO: Refactor out PS_WAIT_CLOSE
-  state_ = PS_WAIT_CLOSE;
-  BufferedReadAdapter::Close();
-  OnCloseEvent(this, 0);
-}
-
-void AsyncHttpsProxySocket::Error(int error) {
-  BufferInput(false);
-  Close();
-  SetError(error);
-  SignalCloseEvent(this, error);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-AsyncSocksProxySocket::AsyncSocksProxySocket(AsyncSocket* socket,
-                                             const SocketAddress& proxy,
-                                             const std::string& username,
-                                             const CryptString& password)
-    : BufferedReadAdapter(socket, 1024), state_(SS_ERROR), proxy_(proxy),
-      user_(username), pass_(password) {
-}
-
-AsyncSocksProxySocket::~AsyncSocksProxySocket() = default;
-
-int AsyncSocksProxySocket::Connect(const SocketAddress& addr) {
-  int ret;
-  dest_ = addr;
-  state_ = SS_INIT;
-  BufferInput(true);
-  ret = BufferedReadAdapter::Connect(proxy_);
-  // TODO: Set state_ appropriately if Connect fails.
-  return ret;
-}
-
-SocketAddress AsyncSocksProxySocket::GetRemoteAddress() const {
-  return dest_;
-}
-
-int AsyncSocksProxySocket::Close() {
-  state_ = SS_ERROR;
-  dest_.Clear();
-  return BufferedReadAdapter::Close();
-}
-
-Socket::ConnState AsyncSocksProxySocket::GetState() const {
-  if (state_ < SS_TUNNEL) {
-    return CS_CONNECTING;
-  } else if (state_ == SS_TUNNEL) {
-    return CS_CONNECTED;
-  } else {
-    return CS_CLOSED;
-  }
-}
-
-void AsyncSocksProxySocket::OnConnectEvent(AsyncSocket* socket) {
-  SendHello();
-}
-
-void AsyncSocksProxySocket::ProcessInput(char* data, size_t* len) {
-  RTC_DCHECK(state_ < SS_TUNNEL);
-
-  ByteBufferReader response(data, *len);
-
-  if (state_ == SS_HELLO) {
-    uint8_t ver, method;
-    if (!response.ReadUInt8(&ver) ||
-        !response.ReadUInt8(&method))
-      return;
-
-    if (ver != 5) {
-      Error(0);
-      return;
-    }
-
-    if (method == 0) {
-      SendConnect();
-    } else if (method == 2) {
-      SendAuth();
-    } else {
-      Error(0);
-      return;
-    }
-  } else if (state_ == SS_AUTH) {
-    uint8_t ver, status;
-    if (!response.ReadUInt8(&ver) ||
-        !response.ReadUInt8(&status))
-      return;
-
-    if ((ver != 1) || (status != 0)) {
-      Error(SOCKET_EACCES);
-      return;
-    }
-
-    SendConnect();
-  } else if (state_ == SS_CONNECT) {
-    uint8_t ver, rep, rsv, atyp;
-    if (!response.ReadUInt8(&ver) ||
-        !response.ReadUInt8(&rep) ||
-        !response.ReadUInt8(&rsv) ||
-        !response.ReadUInt8(&atyp))
-      return;
-
-    if ((ver != 5) || (rep != 0)) {
-      Error(0);
-      return;
-    }
-
-    uint16_t port;
-    if (atyp == 1) {
-      uint32_t addr;
-      if (!response.ReadUInt32(&addr) ||
-          !response.ReadUInt16(&port))
-        return;
-      LOG(LS_VERBOSE) << "Bound on " << addr << ":" << port;
-    } else if (atyp == 3) {
-      uint8_t len;
-      std::string addr;
-      if (!response.ReadUInt8(&len) ||
-          !response.ReadString(&addr, len) ||
-          !response.ReadUInt16(&port))
-        return;
-      LOG(LS_VERBOSE) << "Bound on " << addr << ":" << port;
-    } else if (atyp == 4) {
-      std::string addr;
-      if (!response.ReadString(&addr, 16) ||
-          !response.ReadUInt16(&port))
-        return;
-      LOG(LS_VERBOSE) << "Bound on <IPV6>:" << port;
-    } else {
-      Error(0);
-      return;
-    }
-
-    state_ = SS_TUNNEL;
-  }
-
-  // Consume parsed data
-  *len = response.Length();
-  memmove(data, response.Data(), *len);
-
-  if (state_ != SS_TUNNEL)
-    return;
-
-  bool remainder = (*len > 0);
-  BufferInput(false);
-  SignalConnectEvent(this);
-
-  // FIX: if SignalConnect causes the socket to be destroyed, we are in trouble
-  if (remainder)
-    SignalReadEvent(this);  // TODO: signal this??
-}
-
-void AsyncSocksProxySocket::SendHello() {
-  ByteBufferWriter request;
-  request.WriteUInt8(5);    // Socks Version
-  if (user_.empty()) {
-    request.WriteUInt8(1);  // Authentication Mechanisms
-    request.WriteUInt8(0);  // No authentication
-  } else {
-    request.WriteUInt8(2);  // Authentication Mechanisms
-    request.WriteUInt8(0);  // No authentication
-    request.WriteUInt8(2);  // Username/Password
-  }
-  DirectSend(request.Data(), request.Length());
-  state_ = SS_HELLO;
-}
-
-void AsyncSocksProxySocket::SendAuth() {
-  ByteBufferWriter request;
-  request.WriteUInt8(1);           // Negotiation Version
-  request.WriteUInt8(static_cast<uint8_t>(user_.size()));
-  request.WriteString(user_);      // Username
-  request.WriteUInt8(static_cast<uint8_t>(pass_.GetLength()));
-  size_t len = pass_.GetLength() + 1;
-  char * sensitive = new char[len];
-  pass_.CopyTo(sensitive, true);
-  request.WriteString(sensitive);  // Password
-  memset(sensitive, 0, len);
-  delete [] sensitive;
-  DirectSend(request.Data(), request.Length());
-  state_ = SS_AUTH;
-}
-
-void AsyncSocksProxySocket::SendConnect() {
-  ByteBufferWriter request;
-  request.WriteUInt8(5);              // Socks Version
-  request.WriteUInt8(1);              // CONNECT
-  request.WriteUInt8(0);              // Reserved
-  if (dest_.IsUnresolvedIP()) {
-    std::string hostname = dest_.hostname();
-    request.WriteUInt8(3);            // DOMAINNAME
-    request.WriteUInt8(static_cast<uint8_t>(hostname.size()));
-    request.WriteString(hostname);    // Destination Hostname
-  } else {
-    request.WriteUInt8(1);            // IPV4
-    request.WriteUInt32(dest_.ip());  // Destination IP
-  }
-  request.WriteUInt16(dest_.port());  // Destination Port
-  DirectSend(request.Data(), request.Length());
-  state_ = SS_CONNECT;
-}
-
-void AsyncSocksProxySocket::Error(int error) {
-  state_ = SS_ERROR;
-  BufferInput(false);
-  Close();
-  SetError(SOCKET_EACCES);
-  SignalCloseEvent(this, error);
-}
-
-AsyncSocksProxyServerSocket::AsyncSocksProxyServerSocket(AsyncSocket* socket)
-    : AsyncProxyServerSocket(socket, kBufferSize), state_(SS_HELLO) {
-  BufferInput(true);
-}
-
-void AsyncSocksProxyServerSocket::ProcessInput(char* data, size_t* len) {
-  // TODO: See if the whole message has arrived
-  RTC_DCHECK(state_ < SS_CONNECT_PENDING);
-
-  ByteBufferReader response(data, *len);
-  if (state_ == SS_HELLO) {
-    HandleHello(&response);
-  } else if (state_ == SS_AUTH) {
-    HandleAuth(&response);
-  } else if (state_ == SS_CONNECT) {
-    HandleConnect(&response);
-  }
-
-  // Consume parsed data
-  *len = response.Length();
-  memmove(data, response.Data(), *len);
-}
-
-void AsyncSocksProxyServerSocket::DirectSend(const ByteBufferWriter& buf) {
-  BufferedReadAdapter::DirectSend(buf.Data(), buf.Length());
-}
-
-void AsyncSocksProxyServerSocket::HandleHello(ByteBufferReader* request) {
-  uint8_t ver, num_methods;
-  if (!request->ReadUInt8(&ver) ||
-      !request->ReadUInt8(&num_methods)) {
-    Error(0);
-    return;
-  }
-
-  if (ver != 5) {
-    Error(0);
-    return;
-  }
-
-  // Handle either no-auth (0) or user/pass auth (2)
-  uint8_t method = 0xFF;
-  if (num_methods > 0 && !request->ReadUInt8(&method)) {
-    Error(0);
-    return;
-  }
-
-  // TODO: Ask the server which method to use.
-  SendHelloReply(method);
-  if (method == 0) {
-    state_ = SS_CONNECT;
-  } else if (method == 2) {
-    state_ = SS_AUTH;
-  } else {
-    state_ = SS_ERROR;
-  }
-}
-
-void AsyncSocksProxyServerSocket::SendHelloReply(uint8_t method) {
-  ByteBufferWriter response;
-  response.WriteUInt8(5);  // Socks Version
-  response.WriteUInt8(method);  // Auth method
-  DirectSend(response);
-}
-
-void AsyncSocksProxyServerSocket::HandleAuth(ByteBufferReader* request) {
-  uint8_t ver, user_len, pass_len;
-  std::string user, pass;
-  if (!request->ReadUInt8(&ver) ||
-      !request->ReadUInt8(&user_len) ||
-      !request->ReadString(&user, user_len) ||
-      !request->ReadUInt8(&pass_len) ||
-      !request->ReadString(&pass, pass_len)) {
-    Error(0);
-    return;
-  }
-
-  // TODO: Allow for checking of credentials.
-  SendAuthReply(0);
-  state_ = SS_CONNECT;
-}
-
-void AsyncSocksProxyServerSocket::SendAuthReply(uint8_t result) {
-  ByteBufferWriter response;
-  response.WriteUInt8(1);  // Negotiation Version
-  response.WriteUInt8(result);
-  DirectSend(response);
-}
-
-void AsyncSocksProxyServerSocket::HandleConnect(ByteBufferReader* request) {
-  uint8_t ver, command, reserved, addr_type;
-  uint32_t ip;
-  uint16_t port;
-  if (!request->ReadUInt8(&ver) ||
-      !request->ReadUInt8(&command) ||
-      !request->ReadUInt8(&reserved) ||
-      !request->ReadUInt8(&addr_type) ||
-      !request->ReadUInt32(&ip) ||
-      !request->ReadUInt16(&port)) {
-      Error(0);
-      return;
-  }
-
-  if (ver != 5 || command != 1 ||
-      reserved != 0 || addr_type != 1) {
-      Error(0);
-      return;
-  }
-
-  SignalConnectRequest(this, SocketAddress(ip, port));
-  state_ = SS_CONNECT_PENDING;
-}
-
-void AsyncSocksProxyServerSocket::SendConnectResult(int result,
-                                                    const SocketAddress& addr) {
-  if (state_ != SS_CONNECT_PENDING)
-    return;
-
-  ByteBufferWriter response;
-  response.WriteUInt8(5);  // Socks version
-  response.WriteUInt8((result != 0));  // 0x01 is generic error
-  response.WriteUInt8(0);  // reserved
-  response.WriteUInt8(1);  // IPv4 address
-  response.WriteUInt32(addr.ip());
-  response.WriteUInt16(addr.port());
-  DirectSend(response);
-  BufferInput(false);
-  state_ = SS_TUNNEL;
-}
-
-void AsyncSocksProxyServerSocket::Error(int error) {
-  state_ = SS_ERROR;
-  BufferInput(false);
-  Close();
-  SetError(SOCKET_EACCES);
-  SignalCloseEvent(this, error);
-}
-
 }  // namespace rtc