Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "shill/openvpn_management_server.h" |
| 6 | |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 7 | #include <netinet/in.h> |
| 8 | |
| 9 | #include <base/bind.h> |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 10 | #include <base/logging.h> |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 11 | #include <base/string_split.h> |
| 12 | #include <base/string_util.h> |
| 13 | #include <base/stringprintf.h> |
| 14 | |
| 15 | #include "shill/event_dispatcher.h" |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame^] | 16 | #include "shill/openvpn_driver.h" |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 17 | #include "shill/sockets.h" |
| 18 | |
| 19 | using base::Bind; |
| 20 | using base::SplitString; |
| 21 | using base::StringPrintf; |
| 22 | using std::string; |
| 23 | using std::vector; |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 24 | |
| 25 | namespace shill { |
| 26 | |
| 27 | OpenVPNManagementServer::OpenVPNManagementServer(OpenVPNDriver *driver) |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 28 | : driver_(driver), |
| 29 | weak_ptr_factory_(this), |
| 30 | ready_callback_(Bind(&OpenVPNManagementServer::OnReady, |
| 31 | weak_ptr_factory_.GetWeakPtr())), |
| 32 | input_callback_(Bind(&OpenVPNManagementServer::OnInput, |
| 33 | weak_ptr_factory_.GetWeakPtr())), |
| 34 | sockets_(NULL), |
| 35 | socket_(-1), |
| 36 | dispatcher_(NULL), |
| 37 | connected_socket_(-1) {} |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 38 | |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 39 | OpenVPNManagementServer::~OpenVPNManagementServer() { |
| 40 | Stop(); |
| 41 | } |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 42 | |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 43 | bool OpenVPNManagementServer::Start(EventDispatcher *dispatcher, |
| 44 | Sockets *sockets) { |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 45 | VLOG(2) << __func__; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 46 | if (sockets_) { |
| 47 | return true; |
| 48 | } |
| 49 | |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame^] | 50 | int socket = sockets->Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 51 | if (socket < 0) { |
| 52 | PLOG(ERROR) << "Unable to create management server socket."; |
| 53 | return false; |
| 54 | } |
| 55 | |
| 56 | struct sockaddr_in addr; |
| 57 | socklen_t addrlen = sizeof(addr); |
| 58 | memset(&addr, 0, sizeof(addr)); |
| 59 | addr.sin_family = AF_INET; |
| 60 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 61 | if (sockets->Bind( |
| 62 | socket, reinterpret_cast<struct sockaddr *>(&addr), addrlen) < 0 || |
| 63 | sockets->Listen(socket, 1) < 0 || |
| 64 | sockets->GetSockName( |
| 65 | socket, reinterpret_cast<struct sockaddr *>(&addr), &addrlen) < 0) { |
| 66 | PLOG(ERROR) << "Socket setup failed."; |
| 67 | sockets->Close(socket); |
| 68 | return false; |
| 69 | } |
| 70 | |
| 71 | VLOG(2) << "Listening socket: " << socket; |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame^] | 72 | sockets_ = sockets; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 73 | socket_ = socket; |
| 74 | ready_handler_.reset( |
| 75 | dispatcher->CreateReadyHandler( |
| 76 | socket, IOHandler::kModeInput, ready_callback_)); |
| 77 | dispatcher_ = dispatcher; |
| 78 | return true; |
| 79 | } |
| 80 | |
| 81 | void OpenVPNManagementServer::Stop() { |
| 82 | VLOG(2) << __func__; |
| 83 | if (!sockets_) { |
| 84 | return; |
| 85 | } |
| 86 | input_handler_.reset(); |
| 87 | if (connected_socket_ >= 0) { |
| 88 | sockets_->Close(connected_socket_); |
| 89 | connected_socket_ = -1; |
| 90 | } |
| 91 | dispatcher_ = NULL; |
| 92 | ready_handler_.reset(); |
| 93 | if (socket_ >= 0) { |
| 94 | sockets_->Close(socket_); |
| 95 | socket_ = -1; |
| 96 | } |
| 97 | sockets_ = NULL; |
| 98 | } |
| 99 | |
| 100 | void OpenVPNManagementServer::OnReady(int fd) { |
| 101 | VLOG(2) << __func__ << "(" << fd << ")"; |
| 102 | connected_socket_ = sockets_->Accept(fd, NULL, NULL); |
| 103 | if (connected_socket_ < 0) { |
| 104 | PLOG(ERROR) << "Connected socket accept failed."; |
| 105 | return; |
| 106 | } |
| 107 | ready_handler_.reset(); |
| 108 | input_handler_.reset( |
| 109 | dispatcher_->CreateInputHandler(connected_socket_, input_callback_)); |
| 110 | SendState("on"); |
| 111 | } |
| 112 | |
| 113 | void OpenVPNManagementServer::OnInput(InputData *data) { |
| 114 | VLOG(2) << __func__ << "(" << data->len << ")"; |
| 115 | vector<string> messages; |
| 116 | SplitString( |
| 117 | string(reinterpret_cast<char *>(data->buf), data->len), '\n', &messages); |
| 118 | for (vector<string>::const_iterator it = messages.begin(); |
| 119 | it != messages.end(); ++it) { |
| 120 | ProcessMessage(*it); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | void OpenVPNManagementServer::ProcessMessage(const string &message) { |
| 125 | VLOG(2) << __func__ << "(" << message << ")"; |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame^] | 126 | LOG_IF(WARNING, |
| 127 | !ProcessInfoMessage(message) && |
| 128 | !ProcessNeedPasswordMessage(message) && |
| 129 | !ProcessFailedPasswordMessage(message) && |
| 130 | !ProcessStateMessage(message)) |
| 131 | << "OpenVPN management message ignored: " << message; |
| 132 | } |
| 133 | |
| 134 | bool OpenVPNManagementServer::ProcessInfoMessage(const string &message) { |
| 135 | return StartsWithASCII(message, ">INFO:", true); |
| 136 | } |
| 137 | |
| 138 | bool OpenVPNManagementServer::ProcessNeedPasswordMessage( |
| 139 | const string &message) { |
| 140 | if (!StartsWithASCII(message, ">PASSWORD:Need ", true)) { |
| 141 | return false; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 142 | } |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame^] | 143 | NOTIMPLEMENTED(); |
| 144 | return true; |
| 145 | } |
| 146 | |
| 147 | bool OpenVPNManagementServer::ProcessFailedPasswordMessage( |
| 148 | const string &message) { |
| 149 | if (!StartsWithASCII(message, ">PASSWORD:Verification Failed:", true)) { |
| 150 | return false; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 151 | } |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame^] | 152 | NOTIMPLEMENTED(); |
| 153 | return true; |
| 154 | } |
| 155 | |
| 156 | // >STATE:* message support. State messages are of the form: |
| 157 | // >STATE:<date>,<state>,<detail>,<local-ip>,<remote-ip> |
| 158 | // where: |
| 159 | // <date> is the current time (since epoch) in seconds |
| 160 | // <state> is one of: |
| 161 | // INITIAL, CONNECTING, WAIT, AUTH, GET_CONFIG, ASSIGN_IP, ADD_ROUTES, |
| 162 | // CONNECTED, RECONNECTING, EXITING, RESOLVE, TCP_CONNECT |
| 163 | // <detail> is a free-form string giving details about the state change |
| 164 | // <local-ip> is a dotted-quad for the local IPv4 address (when available) |
| 165 | // <remote-ip> is a dotted-quad for the remote IPv4 address (when available) |
| 166 | bool OpenVPNManagementServer::ProcessStateMessage(const string &message) { |
| 167 | if (!StartsWithASCII(message, ">STATE:", true)) { |
| 168 | return false; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 169 | } |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame^] | 170 | vector<string> details; |
| 171 | SplitString(message, ',', &details); |
| 172 | if (details.size() > 1) { |
| 173 | if (details[1] == "RECONNECTING") { |
| 174 | driver_->OnReconnecting(); |
| 175 | } |
| 176 | // The rest of the states are currently ignored. |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 177 | } |
Darin Petkov | 271fe52 | 2012-03-27 13:47:29 +0200 | [diff] [blame^] | 178 | return true; |
Darin Petkov | 78f6326 | 2012-03-26 01:30:24 +0200 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | void OpenVPNManagementServer::Send(const string &data) { |
| 182 | VLOG(2) << __func__ << "(" << data << ")"; |
| 183 | ssize_t len = sockets_->Send(connected_socket_, data.data(), data.size(), 0); |
| 184 | PLOG_IF(ERROR, len < 0 || static_cast<size_t>(len) != data.size()) |
| 185 | << "Send failed: " << data; |
| 186 | } |
| 187 | |
| 188 | void OpenVPNManagementServer::SendState(const string &state) { |
| 189 | VLOG(2) << __func__ << "(" << state << ")"; |
| 190 | Send(StringPrintf("state %s\n", state.c_str())); |
Darin Petkov | 1c11520 | 2012-03-22 15:35:47 +0100 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | } // namespace shill |