server/Server.cpp

   1 //\r
   2 // Server.cpp\r
   3 //\r
   4 \r
   5 #include "Server.hpp"\r
   6 #include "version.hpp"\r
   7 #include <algorithm>\r
   8 #include <boost/make_shared.hpp>\r
   9 #include <boost/foreach.hpp>\r
  10 #include "../common/Logger.hpp"\r
  11 #include "../common/network/Command.hpp"\r
  12 #include "../common/network/Utils.hpp"\r
  13 \r
  14 namespace network {\r
  15 \r
  16     Server::Server(Config& config) :\r
  17                         config_(config),\r
  18             endpoint_(tcp::v4(), config.port()),\r
  19             acceptor_(io_service_, endpoint_),\r
  20             socket_udp_(io_service_, udp::endpoint(udp::v4(), config.port())),\r
  21             udp_packet_count_(0)\r
  22     {\r
  23     }\r
  24 \r
  25     void Server::Start(CallbackFuncPtr callback)\r
  26     {\r
  27         callback_ = std::make_shared<CallbackFunc>(\r
  28                 [&](network::Command c){\r
  29 \r
  30             // ログアウト\r
  31             if (c.header() == network::header::FatalConnectionError) {\r
  32                 if (callback) {\r
  33                                         (*callback)(c);\r
  34                                 }\r
  35             } else if (auto session = c.session().lock()) {\r
  36                                 auto read_average = session->GetReadByteAverage();\r
  37                                 if (read_average > config_.receive_limit_2()) {\r
  38                                         Logger::Info(_T("Banished a session: %d %dbyte/s"), session->id(), read_average);\r
  39                                         session->Close();\r
  40                                 } else if(read_average > config_.receive_limit_1()) {\r
  41                                         Logger::Info(_T("Receive limit exceeded: %d: %d byte/s"), session->id(), read_average);\r
  42                                 } else {\r
  43                                         if (callback) {\r
  44                                                 (*callback)(c);\r
  45                                         }\r
  46                 }\r
  47             }\r
  48 \r
  49         });\r
  50 \r
  51         {\r
  52         auto new_session = boost::make_shared<ServerSession>(io_service_);\r
  53         acceptor_.async_accept(new_session->tcp_socket(),\r
  54                               boost::bind(&Server::ReceiveSession, this, new_session, boost::asio::placeholders::error));\r
  55         }\r
  56 \r
  57         {\r
  58             socket_udp_.async_receive_from(\r
  59                 boost::asio::buffer(receive_buf_udp_, UDP_MAX_RECEIVE_LENGTH), sender_endpoint_,\r
  60                 boost::bind(&Server::ReceiveUDP, this,\r
  61                   boost::asio::placeholders::error,\r
  62                   boost::asio::placeholders::bytes_transferred));\r
  63         }\r
  64 \r
  65         boost::asio::io_service::work work(io_service_);\r
  66         io_service_.run();\r
  67     }\r
  68 \r
  69     void Server::Stop()\r
  70     {\r
  71         io_service_.stop();\r
  72                 Logger::Info("stop server");\r
  73     }\r
  74     void Server::Stop(int innterrupt_type)\r
  75     {\r
  76         io_service_.stop();\r
  77         Logger::Info(_T("stop server innterrupt_type=%d"),innterrupt_type);\r
  78     }\r
  79 \r
  80         int Server::GetUserCount() const\r
  81         {\r
  82                 auto count = std::count_if(sessions_.begin(), sessions_.end(),\r
  83                         [](const SessionWeakPtr& s){ return !s.expired() && s.lock()->online(); });\r
  84 \r
  85                 return count;\r
  86         }\r
  87 \r
  88         std::string Server::GetStatusJSON() const\r
  89         {\r
  90                 auto msg = (\r
  91                                         boost::format("{\"nam\":\"%s\",\"ver\":\"%d.%d.%d\",\"cnt\":%d,\"cap\":%d,\"stg\":\"%s\"}")\r
  92                                                 % config_.server_name()\r
  93                                                 % MMO_VERSION_MAJOR % MMO_VERSION_MINOR % MMO_VERSION_REVISION\r
  94                                                 % GetUserCount()\r
  95                                                 % config_.capacity()\r
  96                                                 % config_.stage()\r
  97                                         ).str();\r
  98 \r
  99                 return msg;\r
 100         }\r
 101 \r
 102     bool Server::Empty() const\r
 103     {\r
 104         return GetUserCount() == 0;\r
 105     }\r
 106 \r
 107         bool Server::IsBlockedAddress(const boost::asio::ip::address& address)\r
 108         {\r
 109                 BOOST_FOREACH(const auto& pattern, config_.blocking_address_patterns()) {\r
 110                         if (network::Utils::MatchWithWildcard(pattern, address.to_string())) {\r
 111                                 return true;\r
 112                         }\r
 113                 }\r
 114                 return false;\r
 115         }\r
 116 \r
 117     void Server::ReceiveSession(const SessionPtr& session, const boost::system::error_code& error)\r
 118     {\r
 119                 \r
 120                 config_.Reload();\r
 121 \r
 122                 const auto address = session->tcp_socket().remote_endpoint().address();\r
 123                 if(IsBlockedAddress(address)) {\r
 124                         Logger::Info("Blocked IP Address: %s", address);\r
 125             session->Close();\r
 126 \r
 127                 } else if (GetUserCount() >= config_.capacity()) {\r
 128                         Logger::Info("Refused Session");\r
 129             session->SyncSend(ClientReceiveServerCrowdedError());\r
 130             session->Close();\r
 131 \r
 132         } else {\r
 133             session->set_on_receive(callback_);\r
 134             session->Start();\r
 135             sessions_.push_back(SessionWeakPtr(session));\r
 136 \r
 137             // クライアント情報を要求\r
 138             session->Send(ClientRequestedClientInfo());\r
 139         }\r
 140 \r
 141         auto new_session = boost::make_shared<ServerSession>(io_service_);\r
 142          acceptor_.async_accept(new_session->tcp_socket(),\r
 143                  boost::bind(&Server::ReceiveSession, this, new_session, boost::asio::placeholders::error));\r
 144 \r
 145                 RefreshSession();\r
 146     }\r
 147 \r
 148         void Server::RefreshSession()\r
 149         {\r
 150                 // 使用済のセッションのポインタを破棄\r
 151         auto it = std::remove_if(sessions_.begin(), sessions_.end(),\r
 152                 [](const SessionWeakPtr& ptr){\r
 153             return ptr.expired();\r
 154         });\r
 155         sessions_.erase(it, sessions_.end());\r
 156                 Logger::Info("Active connection: %d", GetUserCount());\r
 157         }\r
 158 \r
 159     void Server::SendAll(const Command& command, int channel, bool limited)\r
 160     {\r
 161         BOOST_FOREACH(SessionWeakPtr& ptr, sessions_) {\r
 162             if (auto session = ptr.lock()) {\r
 163                                 if (channel < 0 || (channel >= 0 && session->channel() == channel)) {\r
 164                                         if (!limited || session->write_average_limit() > session->GetWriteByteAverage()) {\r
 165                                                 session->Send(command);\r
 166                                         }\r
 167                                 }\r
 168             }\r
 169         }\r
 170     }\r
 171 \r
 172     void Server::SendOthers(const Command& command, uint32_t self_id, int channel, bool limited)\r
 173     {\r
 174         BOOST_FOREACH(SessionWeakPtr& ptr, sessions_) {\r
 175             if (auto session = ptr.lock()) {\r
 176                                 if (channel < 0 || (channel >= 0 && session->channel() == channel)) {\r
 177                                         if (!limited || session->write_average_limit() > session->GetWriteByteAverage()) {\r
 178                                                 if (session->id() != self_id) {\r
 179                                                         session->Send(command);\r
 180                                                 }\r
 181                                         }\r
 182                                 }\r
 183             }\r
 184         }\r
 185     }\r
 186         \r
 187     void Server::SendTo(const Command& command, uint32_t user_id)\r
 188         {\r
 189                 auto it = std::find_if(sessions_.begin(), sessions_.end(),\r
 190                         [user_id](SessionWeakPtr& ptr){\r
 191                                 return ptr.lock()->id() == user_id;\r
 192                         });\r
 193                 \r
 194                 if (it != sessions_.end()) {\r
 195                         it->lock()->Send(command);\r
 196                 }\r
 197         }\r
 198 \r
 199     void Server::SendUDPTestPacket(const std::string& ip_address, uint16_t port)\r
 200     {\r
 201         using boost::asio::ip::udp;\r
 202 \r
 203         std::stringstream port_str;\r
 204         port_str << (int)port;\r
 205 \r
 206         udp::resolver resolver(io_service_);\r
 207         udp::resolver::query query(udp::v4(), ip_address.c_str(), port_str.str().c_str());\r
 208         udp::resolver::iterator iterator = resolver.resolve(query);\r
 209 \r
 210         static char request[] = "MMO UDP Test Packet";\r
 211         for (int i = 0; i < UDP_TEST_PACKET_TIME; i++) {\r
 212 \r
 213             io_service_.post(boost::bind(&Server::DoWriteUDP, this, request, *iterator));\r
 214         }\r
 215     }\r
 216 \r
 217     void Server::SendUDP(const std::string& message, const boost::asio::ip::udp::endpoint endpoint)\r
 218     {\r
 219                 io_service_.post(boost::bind(&Server::DoWriteUDP, this, message, endpoint));\r
 220     }\r
 221 \r
 222     void Server::ReceiveUDP(const boost::system::error_code& error, size_t bytes_recvd)\r
 223     {\r
 224         if (bytes_recvd > 0) {\r
 225             std::string buffer(receive_buf_udp_, bytes_recvd);\r
 226             FetchUDP(buffer, sender_endpoint_);\r
 227         }\r
 228         if (!error) {\r
 229           socket_udp_.async_receive_from(\r
 230               boost::asio::buffer(receive_buf_udp_, UDP_MAX_RECEIVE_LENGTH), sender_endpoint_,\r
 231               boost::bind(&Server::ReceiveUDP, this,\r
 232                 boost::asio::placeholders::error,\r
 233                 boost::asio::placeholders::bytes_transferred));\r
 234         } else {\r
 235             Logger::Error("%s", error.message());\r
 236         }\r
 237     }\r
 238 \r
 239     void Server::DoWriteUDP(const std::string& msg, const udp::endpoint& endpoint)\r
 240     {\r
 241         boost::shared_ptr<std::string> s = \r
 242               boost::make_shared<std::string>(msg.data(), msg.size());\r
 243 \r
 244         socket_udp_.async_send_to(\r
 245             boost::asio::buffer(s->data(), s->size()), endpoint,\r
 246             boost::bind(&Server::WriteUDP, this,\r
 247               boost::asio::placeholders::error, s));\r
 248     }\r
 249 \r
 250     void Server::WriteUDP(const boost::system::error_code& error, boost::shared_ptr<std::string> holder)\r
 251     {\r
 252 //        if (!error) {\r
 253 //            if (!send_queue_.empty()) {\r
 254 //                  send_queue_.pop();\r
 255 //                  if (!send_queue_.empty())\r
 256 //                  {\r
 257 //                    boost::asio::async_write(socket_tcp_,\r
 258 //                        boost::asio::buffer(send_queue_.front().data(),\r
 259 //                          send_queue_.front().size()),\r
 260 //                        boost::bind(&Session::WriteTCP, this,\r
 261 //                          boost::asio::placeholders::error));\r
 262 //                  }\r
 263 //            }\r
 264 //        } else {\r
 265 //            FatalError();\r
 266 //        }\r
 267     }\r
 268 \r
 269     void Server::FetchUDP(const std::string& buffer, const boost::asio::ip::udp::endpoint endpoint)\r
 270     {\r
 271         uint8_t header;\r
 272         std::string body;\r
 273         SessionWeakPtr session;\r
 274 \r
 275                 // IPアドレスとポートからセッションを特定\r
 276                 auto it = std::find_if(sessions_.begin(), sessions_.end(),\r
 277                         [&endpoint](const SessionWeakPtr& session) -> bool {\r
 278                                 if (auto session_ptr = session.lock()) {\r
 279 \r
 280                                         const auto session_endpoint = session_ptr->tcp_socket().remote_endpoint();\r
 281                                         const auto session_port = session_ptr->udp_port();\r
 282 \r
 283                                         return (session_endpoint.address() == endpoint.address() &&\r
 284                                                 session_port == endpoint.port());\r
 285 \r
 286                                 } else {\r
 287                                         return false;\r
 288                                 }\r
 289                         });\r
 290 \r
 291                 if (it != sessions_.end()) {\r
 292                         session = *it;\r
 293                         Logger::Debug("Receive UDP Command: %d", session.lock()->id());\r
 294                 } else {\r
 295                         Logger::Debug("Receive anonymous UDP Command");\r
 296                 }\r
 297 \r
 298         if (buffer.size() > network::Utils::Deserialize(buffer, &header)) {\r
 299                         body = buffer.substr(sizeof(header));\r
 300                 }\r
 301 \r
 302         // 復号\r
 303         if (session.lock() && header == header::ENCRYPT_HEADER) {\r
 304             body.erase(0, sizeof(header));\r
 305                         body = session.lock()->encrypter().Decrypt(body);\r
 306             Utils::Deserialize(body, &header);\r
 307                         body = buffer.substr(sizeof(header));\r
 308         }\r
 309 \r
 310                 if (header == network::header::ServerRequstedStatus) {\r
 311                         SendUDP(GetStatusJSON(), endpoint);\r
 312                 } else {\r
 313                         if (callback_) {\r
 314                                 (*callback_)(Command(static_cast<network::header::CommandHeader>(header), body, session));\r
 315                         }\r
 316                 }\r
 317 \r
 318     }\r
 319 \r
 320     void Server::ServerSession::Start()\r
 321     {\r
 322         online_ = true;\r
 323 \r
 324         // Nagleアルゴリズムを無効化\r
 325         socket_tcp_.set_option(boost::asio::ip::tcp::no_delay(true));\r
 326 \r
 327                 // バッファサイズを変更 1MiB\r
 328                 boost::asio::socket_base::receive_buffer_size option(1048576);\r
 329                 socket_tcp_.set_option(option);\r
 330 \r
 331         // IPアドレスを取得\r
 332         global_ip_ = socket_tcp_.remote_endpoint().address().to_string();\r
 333 \r
 334         boost::asio::async_read_until(socket_tcp_,\r
 335             receive_buf_, NETWORK_UTILS_DELIMITOR,\r
 336             boost::bind(\r
 337               &ServerSession::ReceiveTCP, shared_from_this(),\r
 338               boost::asio::placeholders::error));\r
 339     }\r
 340 }\r