summaryrefslogtreecommitdiff
path: root/src/net/eathena/network.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/net/eathena/network.cpp')
-rw-r--r--src/net/eathena/network.cpp520
1 files changed, 520 insertions, 0 deletions
diff --git a/src/net/eathena/network.cpp b/src/net/eathena/network.cpp
new file mode 100644
index 000000000..17514d025
--- /dev/null
+++ b/src/net/eathena/network.cpp
@@ -0,0 +1,520 @@
+/*
+ * The ManaPlus Client
+ * Copyright (C) 2004-2009 The Mana World Development Team
+ * Copyright (C) 2009-2010 The Mana Developers
+ * Copyright (C) 2011-2012 The ManaPlus Developers
+ *
+ * This file is part of The ManaPlus Client.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "net/eathena/network.h"
+
+#include "configuration.h"
+#include "logger.h"
+
+#include "net/messagehandler.h"
+#include "net/messagein.h"
+
+#include "net/eathena/protocol.h"
+
+#include "utils/gettext.h"
+#include "utils/stringutils.h"
+
+#include <assert.h>
+#include <sstream>
+
+#include "debug.h"
+
+namespace EAthena
+{
+
+/** Warning: buffers and other variables are shared,
+ so there can be only one connection active at a time */
+
+short packet_lengths[] =
+{
+ 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+// #0x0040
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 50, 3, -1, 55, 17, 3, 37, 46, -1, 23, -1, 3, 108, 3, 2,
+ 3, 28, 19, 11, 3, -1, 9, 5, 55, 53, 58, 60, 44, 2, 6, 6,
+// #0x0080
+ 7, 3, 2, 2, 2, 5, 16, 12, 10, 7, 29, 23, -1, -1, -1, 0,
+ 7, 22, 28, 2, 6, 30, -1, -1, 3, -1, -1, 5, 9, 17, 17, 6,
+ 23, 6, 6, -1, -1, -1, -1, 8, 7, 6, 7, 4, 7, 0, -1, 6,
+ 8, 8, 3, 3, -1, 6, 6, -1, 7, 6, 2, 5, 6, 44, 5, 3,
+// #0x00C0
+ 7, 2, 6, 8, 6, 7, -1, -1, -1, -1, 3, 3, 6, 6, 2, 27,
+ 3, 4, 4, 2, -1, -1, 3, -1, 6, 14, 3, -1, 28, 29, -1, -1,
+ 30, 30, 26, 2, 6, 26, 3, 3, 8, 19, 5, 2, 3, 2, 2, 2,
+ 3, 2, 6, 8, 21, 8, 8, 2, 2, 26, 3, -1, 6, 27, 30, 10,
+// #0x0100
+ 2, 6, 6, 30, 79, 31, 10, 10, -1, -1, 4, 6, 6, 2, 11, -1,
+ 10, 39, 4, 10, 31, 35, 10, 18, 2, 13, 15, 20, 68, 2, 3, 16,
+ 6, 14, -1, -1, 21, 8, 8, 8, 8, 8, 2, 2, 3, 4, 2, -1,
+ 6, 86, 6, -1, -1, 7, -1, 6, 3, 16, 4, 4, 4, 6, 24, 26,
+// #0x0140
+ 22, 14, 6, 10, 23, 19, 6, 39, 8, 9, 6, 27, -1, 2, 6, 6,
+110, 6, -1, -1, -1, -1, -1, 6, -1, 54, 66, 54, 90, 42, 6, 42,
+ -1, -1, -1, -1, -1, 30, -1, 3, 14, 3, 30, 10, 43, 14, 186, 182,
+ 14, 30, 10, 3, -1, 6, 106, -1, 4, 5, 4, -1, 6, 7, -1, -1,
+// #0x0180
+ 6, 3, 106, 10, 10, 34, 0, 6, 8, 4, 4, 4, 29, -1, 10, 6,
+ 90, 86, 24, 6, 30, 102, 9, 4, 8, 4, 14, 10, 4, 6, 2, 6,
+ 3, 3, 35, 5, 11, 26, -1, 4, 4, 6, 10, 12, 6, -1, 4, 4,
+ 11, 7, -1, 67, 12, 18, 114, 6, 3, 6, 26, 26, 26, 26, 2, 3,
+// #0x01C0
+ 2, 14, 10, -1, 22, 22, 4, 2, 13, 97, 0, 9, 9, 29, 6, 28,
+ 8, 14, 10, 35, 6, 8, 4, 11, 54, 53, 60, 2, -1, 47, 33, 6,
+ 30, 8, 34, 14, 2, 6, 26, 2, 28, 81, 6, 10, 26, 2, -1, -1,
+ -1, -1, 20, 10, 32, 9, 34, 14, 2, 6, 48, 56, -1, 4, 5, 10,
+// #0x0200
+ 26, 0, 0, 0, 18, 0, 0, 0, 0, 0, 0, 19, 10, 0, 0, 0,
+ 2, -1, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ -1, 122, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+// #0x0240
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+// #0x0280
+ 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 191, 0, 0, 0, 0, 0, 0,
+// #0x02C0
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+// #0x0300
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+const unsigned int BUFFER_SIZE = 655360;
+
+int networkThread(void *data)
+{
+ Network *network = static_cast<Network*>(data);
+
+ if (!network || !network->realConnect())
+ return -1;
+
+ network->receive();
+
+ return 0;
+}
+
+Network *Network::mInstance = nullptr;
+
+Network::Network() :
+ mSocket(nullptr),
+ mInBuffer(new char[BUFFER_SIZE]),
+ mOutBuffer(new char[BUFFER_SIZE]),
+ mInSize(0),
+ mOutSize(0),
+ mToSkip(0),
+ mState(IDLE),
+ mWorkerThread(nullptr)
+{
+ SDLNet_Init();
+
+ mMutex = SDL_CreateMutex();
+ mInstance = this;
+}
+
+Network::~Network()
+{
+ clearHandlers();
+
+ if (mState != IDLE && mState != NET_ERROR)
+ disconnect();
+
+ SDL_DestroyMutex(mMutex);
+ mMutex = nullptr;
+ mInstance = nullptr;
+
+ delete []mInBuffer;
+ delete []mOutBuffer;
+
+ SDLNet_Quit();
+}
+
+bool Network::connect(ServerInfo server)
+{
+ if (mState != IDLE && mState != NET_ERROR)
+ {
+ logger->log1("Tried to connect an already connected socket!");
+ assert(false);
+ return false;
+ }
+
+ if (server.hostname.empty())
+ {
+ setError(_("Empty address given to Network::connect()!"));
+ return false;
+ }
+
+ logger->log("Network::Connecting to %s:%i",
+ server.hostname.c_str(), server.port);
+
+ mServer.hostname = server.hostname;
+ mServer.port = server.port;
+
+ // Reset to sane values
+ mOutSize = 0;
+ mInSize = 0;
+ mToSkip = 0;
+
+ mState = CONNECTING;
+ mWorkerThread = SDL_CreateThread(networkThread, this);
+ if (!mWorkerThread)
+ {
+ setError("Unable to create network worker thread");
+ return false;
+ }
+
+ return true;
+}
+
+void Network::disconnect()
+{
+ mState = IDLE;
+
+ if (mWorkerThread && SDL_GetThreadID(mWorkerThread))
+ {
+ SDL_WaitThread(mWorkerThread, nullptr);
+ mWorkerThread = nullptr;
+ }
+
+ if (mSocket)
+ {
+ // need call SDLNet_TCP_DelSocket?
+ SDLNet_TCP_Close(mSocket);
+ mSocket = nullptr;
+ int sleep = config.getIntValue("networksleep");
+ if (sleep > 0)
+ SDL_Delay(sleep);
+ }
+}
+
+void Network::registerHandler(MessageHandler *handler)
+{
+ if (!handler)
+ return;
+
+ for (const uint16_t *i = handler->handledMessages; *i; ++i)
+ mMessageHandlers[*i] = handler;
+
+ handler->setNetwork(this);
+}
+
+void Network::unregisterHandler(MessageHandler *handler)
+{
+ if (!handler)
+ return;
+
+ for (const uint16_t *i = handler->handledMessages; *i; ++i)
+ mMessageHandlers.erase(*i);
+
+ handler->setNetwork(nullptr);
+}
+
+void Network::clearHandlers()
+{
+ for (MessageHandlerIterator i = mMessageHandlers.begin();
+ i != mMessageHandlers.end(); ++i)
+ {
+ if (i->second)
+ i->second->setNetwork(nullptr);
+ }
+ mMessageHandlers.clear();
+}
+
+void Network::dispatchMessages()
+{
+ while (messageReady())
+ {
+ MessageIn msg = getNextMessage();
+
+ MessageHandlerIterator iter = mMessageHandlers.find(msg.getId());
+
+ if (msg.getLength() == 0)
+ logger->safeError("Zero length packet received. Exiting.");
+
+ if (iter != mMessageHandlers.end())
+ {
+ if (iter->second)
+ iter->second->handleMessage(msg);
+ }
+ else
+ {
+ logger->log("Unhandled packet: %x", msg.getId());
+ }
+
+ skip(msg.getLength());
+ }
+}
+
+void Network::flush()
+{
+ if (!mOutSize || mState != CONNECTED)
+ return;
+
+ int ret;
+
+ SDL_mutexP(mMutex);
+ ret = SDLNet_TCP_Send(mSocket, mOutBuffer, mOutSize);
+ DEBUGLOG("Send " + toString(mOutSize) + " bytes");
+ if (ret < static_cast<int>(mOutSize))
+ {
+ setError("Error in SDLNet_TCP_Send(): " +
+ std::string(SDLNet_GetError()));
+ }
+ mOutSize = 0;
+ SDL_mutexV(mMutex);
+}
+
+void Network::skip(int len)
+{
+ SDL_mutexP(mMutex);
+ mToSkip += len;
+ if (!mInSize)
+ {
+ SDL_mutexV(mMutex);
+ return;
+ }
+
+ if (mInSize >= mToSkip)
+ {
+ mInSize -= mToSkip;
+ memmove(mInBuffer, mInBuffer + mToSkip, mInSize);
+ mToSkip = 0;
+ }
+ else
+ {
+ mToSkip -= mInSize;
+ mInSize = 0;
+ }
+ SDL_mutexV(mMutex);
+}
+
+bool Network::messageReady()
+{
+ int len = -1;
+
+ SDL_mutexP(mMutex);
+ if (mInSize >= 2)
+ {
+ int msgId = readWord(0);
+ if (msgId == SMSG_SERVER_VERSION_RESPONSE)
+ len = 10;
+ else if (msgId == SMSG_UPDATE_HOST2)
+ len = -1;
+ else
+ len = packet_lengths[msgId];
+
+ if (len == -1 && mInSize > 4)
+ len = readWord(2);
+ }
+
+ bool ret = (mInSize >= static_cast<unsigned int>(len));
+ SDL_mutexV(mMutex);
+
+ return ret;
+}
+
+MessageIn Network::getNextMessage()
+{
+ while (!messageReady())
+ {
+ if (mState == NET_ERROR)
+ break;
+ }
+
+ SDL_mutexP(mMutex);
+ int msgId = readWord(0);
+ int len;
+ if (msgId == SMSG_SERVER_VERSION_RESPONSE)
+ len = 10;
+ else if (msgId == SMSG_UPDATE_HOST2)
+ len = -1;
+ else
+ len = packet_lengths[msgId];
+
+ if (len == -1)
+ len = readWord(2);
+
+#ifdef ENABLEDEBUGLOG
+ logger->dlog(strprintf("Received packet 0x%x of length %d\n",
+ msgId, len));
+#endif
+
+ MessageIn msg(mInBuffer, len);
+ SDL_mutexV(mMutex);
+
+ return msg;
+}
+
+bool Network::realConnect()
+{
+ IPaddress ipAddress;
+
+ if (SDLNet_ResolveHost(&ipAddress, mServer.hostname.c_str(),
+ mServer.port) == -1)
+ {
+ std::string errorMessage = _("Unable to resolve host \"") +
+ mServer.hostname + "\"";
+ setError(errorMessage);
+ logger->log("SDLNet_ResolveHost: %s", errorMessage.c_str());
+ return false;
+ }
+
+ mState = CONNECTING;
+
+ mSocket = SDLNet_TCP_Open(&ipAddress);
+ if (!mSocket)
+ {
+ logger->log("Error in SDLNet_TCP_Open(): %s", SDLNet_GetError());
+ setError(SDLNet_GetError());
+ return false;
+ }
+
+ logger->log("Network::Started session with %s:%i",
+ ipToString(ipAddress.host), ipAddress.port);
+
+ mState = CONNECTED;
+
+ return true;
+}
+
+void Network::receive()
+{
+ SDLNet_SocketSet set;
+
+ if (!(set = SDLNet_AllocSocketSet(1)))
+ {
+ setError("Error in SDLNet_AllocSocketSet(): " +
+ std::string(SDLNet_GetError()));
+ return;
+ }
+
+ if (SDLNet_TCP_AddSocket(set, mSocket) == -1)
+ {
+ setError("Error in SDLNet_AddSocket(): " +
+ std::string(SDLNet_GetError()));
+ }
+
+ while (mState == CONNECTED)
+ {
+ // TODO Try to get this to block all the time while still being able
+ // to escape the loop
+ int numReady = SDLNet_CheckSockets(set, (static_cast<uint32_t>(500)));
+ int ret;
+ switch (numReady)
+ {
+ case -1:
+ logger->log1("Error: SDLNet_CheckSockets");
+ // FALLTHROUGH
+ case 0:
+ break;
+
+ case 1:
+ // Receive data from the socket
+ SDL_mutexP(mMutex);
+ ret = SDLNet_TCP_Recv(mSocket, mInBuffer + mInSize,
+ BUFFER_SIZE - mInSize);
+
+ if (!ret)
+ {
+ // We got disconnected
+ mState = IDLE;
+ logger->log1("Disconnected.");
+ }
+ else if (ret < 0)
+ {
+ setError(_("Connection to server terminated. ") +
+ std::string(SDLNet_GetError()));
+ }
+ else
+ {
+// DEBUGLOG("Receive " + toString(ret) + " bytes");
+ mInSize += ret;
+ if (mToSkip)
+ {
+ if (mInSize >= mToSkip)
+ {
+ mInSize -= mToSkip;
+ memmove(mInBuffer, mInBuffer + mToSkip, mInSize);
+ mToSkip = 0;
+ }
+ else
+ {
+ mToSkip -= mInSize;
+ mInSize = 0;
+ }
+ }
+ }
+ SDL_mutexV(mMutex);
+ break;
+
+ default:
+ // more than one socket is ready..
+ // this should not happen since we only listen once socket.
+ std::stringstream errorStream;
+ errorStream << "Error in SDLNet_TCP_Recv(), " << numReady
+ << " sockets are ready: " << SDLNet_GetError();
+ setError(errorStream.str());
+ break;
+ }
+ }
+
+ if (SDLNet_TCP_DelSocket(set, mSocket) == -1)
+ logger->log("Error in SDLNet_DelSocket(): %s", SDLNet_GetError());
+
+ SDLNet_FreeSocketSet(set);
+}
+
+Network *Network::instance()
+{
+ return mInstance;
+}
+
+void Network::setError(const std::string &error)
+{
+ logger->log("Network error: %s", error.c_str());
+ mError = error;
+ mState = NET_ERROR;
+}
+
+uint16_t Network::readWord(int pos)
+{
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ return SDL_Swap16((*(uint16_t*)(mInBuffer + (pos))));
+#else
+ return (*reinterpret_cast<uint16_t*>(mInBuffer + (pos)));
+#endif
+}
+
+} // namespace EAthena