/*
* The Mana Client
* Copyright (C) 2004-2009 The Mana World Development Team
* Copyright (C) 2009-2012 The Mana Developers
*
* This file is part of The Mana 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 .
*/
#include "net/tmwa/network.h"
#include "log.h"
#include "net/tmwa/messagein.h"
#include "net/tmwa/protocol.h"
#include "utils/gettext.h"
#include "utils/stringutils.h"
#include
#include
/** Warning: buffers and other variables are shared,
so there can be only one connection active at a time */
namespace TmwAthena {
struct PacketInfo
{
uint16_t id;
uint16_t length;
const char *name;
};
// indicator for a variable-length packet
const uint16_t VAR = 1;
static const PacketInfo packet_infos[] = {
// login server messages
{ SMSG_UPDATE_HOST, VAR, "SMSG_UPDATE_HOST" },
{ CMSG_LOGIN_REGISTER, 55, "CMSG_LOGIN_REGISTER" },
{ SMSG_LOGIN_DATA, VAR, "SMSG_LOGIN_DATA" },
{ SMSG_LOGIN_ERROR, 23, "SMSG_LOGIN_ERROR" },
// char server messages
{ CMSG_CHAR_PASSWORD_CHANGE, 50, "CMSG_CHAR_PASSWORD_CHANGE" },
{ SMSG_CHAR_PASSWORD_RESPONSE, 3, "SMSG_CHAR_PASSWORD_RESPONSE" },
{ CMSG_CHAR_SERVER_CONNECT, 17, "CMSG_CHAR_SERVER_CONNECT" },
{ CMSG_CHAR_SELECT, 3, "CMSG_CHAR_SELECT" },
{ CMSG_CHAR_CREATE, 37, "CMSG_CHAR_CREATE" },
{ CMSG_CHAR_DELETE, 46, "CMSG_CHAR_DELETE" },
{ SMSG_CHAR_LOGIN, VAR, "SMSG_CHAR_LOGIN" },
{ SMSG_CHAR_LOGIN_ERROR, 3, "SMSG_CHAR_LOGIN_ERROR" },
{ SMSG_CHAR_CREATE_SUCCEEDED, 108, "SMSG_CHAR_CREATE_SUCCEEDED" },
{ SMSG_CHAR_CREATE_FAILED, 3, "SMSG_CHAR_CREATE_FAILED" },
{ SMSG_CHAR_DELETE_SUCCEEDED, 2, "SMSG_CHAR_DELETE_SUCCEEDED" },
{ SMSG_CHAR_DELETE_FAILED, 3, "SMSG_CHAR_DELETE_FAILED" },
{ SMSG_CHAR_MAP_INFO, 28, "SMSG_CHAR_MAP_INFO" },
// map server messages
{ CMSG_MAP_SERVER_CONNECT, 19, "CMSG_MAP_SERVER_CONNECT" },
{ SMSG_MAP_LOGIN_SUCCESS, 11, "SMSG_MAP_LOGIN_SUCCESS" },
{ SMSG_BEING_VISIBLE, 54, "SMSG_BEING_VISIBLE" },
{ SMSG_BEING_MOVE, 60, "SMSG_BEING_MOVE" },
{ SMSG_BEING_SPAWN, 41, "SMSG_BEING_SPAWN" },
{ CMSG_MAP_LOADED, 2, "CMSG_MAP_LOADED" },
{ CMSG_MAP_PING, 6, "CMSG_MAP_PING" },
{ SMSG_SERVER_PING, 6, "SMSG_SERVER_PING" },
{ SMSG_BEING_REMOVE, 7, "SMSG_BEING_REMOVE" },
{ CMSG_PLAYER_CHANGE_DEST, 5, "CMSG_PLAYER_CHANGE_DEST" },
{ SMSG_WALK_RESPONSE, 12, "SMSG_WALK_RESPONSE" },
{ SMSG_PLAYER_STOP, 10, "SMSG_PLAYER_STOP" },
{ CMSG_PLAYER_CHANGE_ACT, 7, "CMSG_PLAYER_CHANGE_ACT" },
{ SMSG_BEING_ACTION, 29, "SMSG_BEING_ACTION" },
{ CMSG_CHAT_MESSAGE, VAR, "CMSG_CHAT_MESSAGE" },
{ SMSG_BEING_CHAT, VAR, "SMSG_BEING_CHAT" },
{ SMSG_PLAYER_CHAT, VAR, "SMSG_PLAYER_CHAT" },
{ CMSG_NPC_TALK, 7, "CMSG_NPC_TALK" },
{ SMSG_PLAYER_WARP, 22, "SMSG_PLAYER_WARP" },
{ SMSG_CHANGE_MAP_SERVER, 28, "SMSG_CHANGE_MAP_SERVER" },
{ CMSG_NAME_REQUEST, 6, "CMSG_NAME_REQUEST" },
{ SMSG_BEING_NAME_RESPONSE, 30, "SMSG_BEING_NAME_RESPONSE" },
{ CMSG_CHAT_WHISPER, VAR, "CMSG_CHAT_WHISPER" },
{ SMSG_WHISPER, VAR, "SMSG_WHISPER" },
{ SMSG_WHISPER_RESPONSE, 3, "SMSG_WHISPER_RESPONSE" },
{ SMSG_GM_CHAT, VAR, "SMSG_GM_CHAT" },
{ CMSG_PLAYER_CHANGE_DIR, 5, "CMSG_PLAYER_CHANGE_DIR" },
{ SMSG_BEING_CHANGE_DIRECTION, 9, "SMSG_BEING_CHANGE_DIRECTION" },
{ SMSG_ITEM_VISIBLE, 17, "SMSG_ITEM_VISIBLE" },
{ SMSG_ITEM_DROPPED, 17, "SMSG_ITEM_DROPPED" },
{ CMSG_ITEM_PICKUP, 6, "CMSG_ITEM_PICKUP" },
{ SMSG_PLAYER_INVENTORY_ADD, 23, "SMSG_PLAYER_INVENTORY_ADD" },
{ SMSG_ITEM_REMOVE, 6, "SMSG_ITEM_REMOVE" },
{ CMSG_PLAYER_INVENTORY_DROP, 6, "CMSG_PLAYER_INVENTORY_DROP" },
{ SMSG_PLAYER_EQUIPMENT, VAR, "SMSG_PLAYER_EQUIPMENT" },
{ SMSG_PLAYER_STORAGE_EQUIP, VAR, "SMSG_PLAYER_STORAGE_EQUIP" },
{ CMSG_PLAYER_INVENTORY_USE, 8, "CMSG_PLAYER_INVENTORY_USE" },
{ SMSG_ITEM_USE_RESPONSE, 7, "SMSG_ITEM_USE_RESPONSE" },
{ CMSG_PLAYER_EQUIP, 6, "CMSG_PLAYER_EQUIP" },
{ SMSG_PLAYER_EQUIP, 7, "SMSG_PLAYER_EQUIP" },
{ CMSG_PLAYER_UNEQUIP, 4, "CMSG_PLAYER_UNEQUIP" },
{ SMSG_PLAYER_UNEQUIP, 7, "SMSG_PLAYER_UNEQUIP" },
{ SMSG_PLAYER_INVENTORY_REMOVE, 6, "SMSG_PLAYER_INVENTORY_REMOVE" },
{ SMSG_PLAYER_STAT_UPDATE_1, 8, "SMSG_PLAYER_STAT_UPDATE_1" },
{ SMSG_PLAYER_STAT_UPDATE_2, 8, "SMSG_PLAYER_STAT_UPDATE_2" },
{ CMSG_PLAYER_REBOOT, 3, "CMSG_PLAYER_REBOOT" },
{ SMSG_CHAR_SWITCH_RESPONSE, 3, "SMSG_CHAR_SWITCH_RESPONSE" },
{ SMSG_NPC_MESSAGE, VAR, "SMSG_NPC_MESSAGE" },
{ SMSG_NPC_NEXT, 6, "SMSG_NPC_NEXT" },
{ SMSG_NPC_CLOSE, 6, "SMSG_NPC_CLOSE" },
{ SMSG_NPC_CHOICE, VAR, "SMSG_NPC_CHOICE" },
{ CMSG_NPC_LIST_CHOICE, 7, "CMSG_NPC_LIST_CHOICE" },
{ CMSG_NPC_NEXT_REQUEST, 6, "CMSG_NPC_NEXT_REQUEST" },
{ CMSG_STAT_UPDATE_REQUEST, 5, "CMSG_STAT_UPDATE_REQUEST" },
{ SMSG_PLAYER_STAT_UPDATE_4, 6, "SMSG_PLAYER_STAT_UPDATE_4" },
{ SMSG_PLAYER_STAT_UPDATE_5, 44, "SMSG_PLAYER_STAT_UPDATE_5" },
{ SMSG_PLAYER_STAT_UPDATE_6, 5, "SMSG_PLAYER_STAT_UPDATE_6" },
{ CMSG_PLAYER_EMOTE, 3, "CMSG_PLAYER_EMOTE" },
{ SMSG_BEING_EMOTION, 7, "SMSG_BEING_EMOTION" },
{ SMSG_NPC_BUY_SELL_CHOICE, 6, "SMSG_NPC_BUY_SELL_CHOICE" },
{ CMSG_NPC_BUY_SELL_REQUEST, 7, "CMSG_NPC_BUY_SELL_REQUEST" },
{ SMSG_NPC_BUY, VAR, "SMSG_NPC_BUY" },
{ SMSG_NPC_SELL, VAR, "SMSG_NPC_SELL" },
{ CMSG_NPC_BUY_REQUEST, VAR, "CMSG_NPC_BUY_REQUEST" },
{ CMSG_NPC_SELL_REQUEST, VAR, "CMSG_NPC_SELL_REQUEST" },
{ SMSG_NPC_BUY_RESPONSE, 3, "SMSG_NPC_BUY_RESPONSE" },
{ SMSG_NPC_SELL_RESPONSE, 3, "SMSG_NPC_SELL_RESPONSE" },
{ SMSG_ADMIN_KICK_ACK, 6, "SMSG_ADMIN_KICK_ACK" },
{ CMSG_TRADE_REQUEST, 6, "CMSG_TRADE_REQUEST" },
{ SMSG_TRADE_REQUEST, 26, "SMSG_TRADE_REQUEST" },
{ CMSG_TRADE_RESPONSE, 3, "CMSG_TRADE_RESPONSE" },
{ SMSG_TRADE_RESPONSE, 3, "SMSG_TRADE_RESPONSE" },
{ CMSG_TRADE_ITEM_ADD_REQUEST, 8, "CMSG_TRADE_ITEM_ADD_REQUEST" },
{ SMSG_TRADE_ITEM_ADD, 19, "SMSG_TRADE_ITEM_ADD" },
{ CMSG_TRADE_ADD_COMPLETE, 2, "CMSG_TRADE_ADD_COMPLETE" },
{ SMSG_TRADE_OK, 3, "SMSG_TRADE_OK" },
{ CMSG_TRADE_CANCEL_REQUEST, 2, "CMSG_TRADE_CANCEL_REQUEST" },
{ SMSG_TRADE_CANCEL, 2, "SMSG_TRADE_CANCEL" },
{ CMSG_TRADE_OK, 2, "CMSG_TRADE_OK" },
{ SMSG_TRADE_COMPLETE, 3, "SMSG_TRADE_COMPLETE" },
{ SMSG_PLAYER_STORAGE_STATUS, 6, "SMSG_PLAYER_STORAGE_STATUS" },
{ CMSG_MOVE_TO_STORAGE, 8, "CMSG_MOVE_TO_STORAGE" },
{ SMSG_PLAYER_STORAGE_ADD, 21, "SMSG_PLAYER_STORAGE_ADD" },
{ CMSG_MOVE_FROM_STORAGE, 8, "CMSG_MOVE_FROM_STORAGE" },
{ SMSG_PLAYER_STORAGE_REMOVE, 8, "SMSG_PLAYER_STORAGE_REMOVE" },
{ CMSG_CLOSE_STORAGE, 2, "CMSG_CLOSE_STORAGE" },
{ SMSG_PLAYER_STORAGE_CLOSE, 2, "SMSG_PLAYER_STORAGE_CLOSE" },
{ CMSG_PARTY_CREATE, 26, "CMSG_PARTY_CREATE" },
{ SMSG_PARTY_CREATE, 3, "SMSG_PARTY_CREATE" },
{ SMSG_PARTY_INFO, VAR, "SMSG_PARTY_INFO" },
{ CMSG_PARTY_INVITE, 6, "CMSG_PARTY_INVITE" },
{ SMSG_PARTY_INVITE_RESPONSE, 27, "SMSG_PARTY_INVITE_RESPONSE" },
{ SMSG_PARTY_INVITED, 30, "SMSG_PARTY_INVITED" },
{ CMSG_PARTY_INVITED, 10, "CMSG_PARTY_INVITED" },
{ CMSG_PARTY_LEAVE, 2, "CMSG_PARTY_LEAVE" },
{ SMSG_PARTY_SETTINGS, 6, "SMSG_PARTY_SETTINGS" },
{ CMSG_PARTY_SETTINGS, 6, "CMSG_PARTY_SETTINGS" },
{ CMSG_PARTY_KICK, 30, "CMSG_PARTY_KICK" },
{ SMSG_PARTY_LEAVE, 31, "SMSG_PARTY_LEAVE" },
{ SMSG_PARTY_UPDATE_HP, 10, "SMSG_PARTY_UPDATE_HP" },
{ SMSG_PARTY_UPDATE_COORDS, 10, "SMSG_PARTY_UPDATE_COORDS" },
{ CMSG_PARTY_MESSAGE, VAR, "CMSG_PARTY_MESSAGE" },
{ SMSG_PARTY_MESSAGE, VAR, "SMSG_PARTY_MESSAGE" },
{ SMSG_PLAYER_SKILL_UP, 11, "SMSG_PLAYER_SKILL_UP" },
{ SMSG_PLAYER_SKILLS, VAR, "SMSG_PLAYER_SKILLS" },
{ SMSG_SKILL_FAILED, 10, "SMSG_SKILL_FAILED" },
{ CMSG_SKILL_LEVELUP_REQUEST, 4, "CMSG_SKILL_LEVELUP_REQUEST" },
{ CMSG_PLAYER_STOP_ATTACK, 2, "CMSG_PLAYER_STOP_ATTACK" },
{ SMSG_PLAYER_STATUS_CHANGE, 13, "SMSG_PLAYER_STATUS_CHANGE" },
{ SMSG_PLAYER_MOVE_TO_ATTACK, 16, "SMSG_PLAYER_MOVE_TO_ATTACK" },
{ SMSG_PLAYER_ATTACK_RANGE, 4, "SMSG_PLAYER_ATTACK_RANGE" },
{ SMSG_PLAYER_ARROW_MESSAGE, 4, "SMSG_PLAYER_ARROW_MESSAGE" },
{ SMSG_PLAYER_ARROW_EQUIP, 4, "SMSG_PLAYER_ARROW_EQUIP" },
{ SMSG_PLAYER_STAT_UPDATE_3, 14, "SMSG_PLAYER_STAT_UPDATE_3" },
{ SMSG_NPC_INT_INPUT, 6, "SMSG_NPC_INT_INPUT" },
{ CMSG_NPC_INT_RESPONSE, 10, "CMSG_NPC_INT_RESPONSE" },
{ CMSG_NPC_CLOSE, 6, "CMSG_NPC_CLOSE" },
{ SMSG_BEING_RESURRECT, 8, "SMSG_BEING_RESURRECT" },
{ CMSG_CLIENT_QUIT, 4, "CMSG_CLIENT_QUIT" },
{ SMSG_MAP_QUIT_RESPONSE, 4, "SMSG_MAP_QUIT_RESPONSE" },
{ SMSG_PLAYER_GUILD_PARTY_INFO, 102, "SMSG_PLAYER_GUILD_PARTY_INFO" },
{ SMSG_BEING_STATUS_CHANGE, 9, "SMSG_BEING_STATUS_CHANGE" },
{ SMSG_PVP_MAP_MODE, 4, "SMSG_PVP_MAP_MODE" },
{ SMSG_PVP_SET, 14, "SMSG_PVP_SET" },
{ SMSG_BEING_SELFEFFECT, 10, "SMSG_BEING_SELFEFFECT" },
{ SMSG_TRADE_ITEM_ADD_RESPONSE, 7, "SMSG_TRADE_ITEM_ADD_RESPONSE" },
{ SMSG_PLAYER_INVENTORY_USE, 13, "SMSG_PLAYER_INVENTORY_USE" },
{ SMSG_NPC_STR_INPUT, 6, "SMSG_NPC_STR_INPUT" },
{ CMSG_NPC_STR_RESPONSE, VAR, "CMSG_NPC_STR_RESPONSE" },
{ SMSG_BEING_CHANGE_LOOKS2, 11, "SMSG_BEING_CHANGE_LOOKS2" },
{ SMSG_PLAYER_UPDATE_1, 54, "SMSG_PLAYER_UPDATE_1" },
{ SMSG_PLAYER_UPDATE_2, 53, "SMSG_PLAYER_UPDATE_2" },
{ SMSG_PLAYER_MOVE, 60, "SMSG_PLAYER_MOVE" },
{ SMSG_SKILL_DAMAGE, 33, "SMSG_SKILL_DAMAGE" },
{ SMSG_PLAYER_INVENTORY, VAR, "SMSG_PLAYER_INVENTORY" },
{ SMSG_PLAYER_STORAGE_ITEMS, VAR, "SMSG_PLAYER_STORAGE_ITEMS" },
{ SMSG_BEING_IP_RESPONSE, 10, "SMSG_BEING_IP_RESPONSE" },
{ CMSG_ONLINE_LIST, 2, "CMSG_ONLINE_LIST" },
{ SMSG_ONLINE_LIST, VAR, "SMSG_ONLINE_LIST" },
{ SMSG_NPC_COMMAND, 16, "SMSG_NPC_COMMAND" },
{ SMSG_QUEST_SET_VAR, 8, "SMSG_QUEST_SET_VAR" },
{ SMSG_QUEST_PLAYER_VARS, VAR, "SMSG_QUEST_PLAYER_VARS" },
{ SMSG_BEING_MOVE3, VAR, "SMSG_BEING_MOVE3" },
{ SMSG_MAP_MASK, 10, "SMSG_MAP_MASK" },
{ SMSG_MAP_MUSIC, VAR, "SMSG_MAP_MUSIC" },
{ SMSG_NPC_CHANGETITLE, VAR, "SMSG_NPC_CHANGETITLE" },
{ SMSG_SCRIPT_MESSAGE, VAR, "SMSG_SCRIPT_MESSAGE" },
{ SMSG_PLAYER_CLIENT_COMMAND, VAR, "SMSG_PLAYER_CLIENT_COMMAND" },
{ SMSG_MAP_SET_TILES_TYPE, 34, "SMSG_MAP_SET_TILES_TYPE" },
{ SMSG_PLAYER_HP, 10, "SMSG_PLAYER_HP" },
{ SMSG_PLAYER_HP_FULL, 14, "SMSG_PLAYER_HP_FULL" },
// any server messages
{ SMSG_CONNECTION_PROBLEM, 3, "SMSG_CONNECTION_PROBLEM" },
{ CMSG_SERVER_VERSION_REQUEST, 2, "CMSG_SERVER_VERSION_REQUEST" },
{ SMSG_SERVER_VERSION_RESPONSE, 10, "SMSG_SERVER_VERSION_RESPONSE" },
{ CMSG_CLIENT_DISCONNECT, 2, "CMSG_CLIENT_DISCONNECT" },
};
const unsigned int BUFFER_SIZE = 65536;
int networkThread(void *data)
{
auto *network = static_cast(data);
if (!network->realConnect())
return -1;
network->receive();
return 0;
}
Network *Network::mInstance = nullptr;
Network::Network():
mInBuffer(new char[BUFFER_SIZE]),
mOutBuffer(new char[BUFFER_SIZE])
{
SDLNet_Init();
mInstance = this;
for (const auto &packetInfo : packet_infos)
{
assert(packetInfo.length != 0);
mPacketInfo[packetInfo.id] = &packetInfo;
}
}
Network::~Network()
{
clearHandlers();
if (mState != IDLE && mState != NET_ERROR)
disconnect();
mInstance = nullptr;
delete[] mInBuffer;
delete[] mOutBuffer;
SDLNet_Quit();
}
bool Network::connect(const ServerInfo &server)
{
if (mState != IDLE && mState != NET_ERROR)
{
logger->log("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, "Network", this);
if (!mWorkerThread)
{
setError("Unable to create network worker thread");
return false;
}
return true;
}
void Network::disconnect()
{
mState = IDLE;
if (mWorkerThread)
{
SDL_WaitThread(mWorkerThread, nullptr);
mWorkerThread = nullptr;
}
if (mSocket)
{
SDLNet_TCP_Close(mSocket);
mSocket = nullptr;
}
}
void Network::registerHandler(MessageHandler *handler)
{
for (const Uint16 *i = handler->handledMessages; *i; ++i)
{
mMessageHandlers[*i] = handler;
}
handler->setNetwork(this);
}
void Network::unregisterHandler(MessageHandler *handler)
{
for (const Uint16 *i = handler->handledMessages; *i; ++i)
{
mMessageHandlers.erase(*i);
}
handler->setNetwork(nullptr);
}
void Network::clearHandlers()
{
for (auto& [_, messageHandler] : mMessageHandlers)
{
messageHandler->setNetwork(nullptr);
}
mMessageHandlers.clear();
}
void Network::dispatchMessages()
{
MutexLocker lock(&mMutex);
while (true) {
// Not even a message ID has been received
if (mInSize < 2)
break;
const uint16_t msgId = readWord(0);
auto packetInfoIt = mPacketInfo.find(msgId);
if (packetInfoIt == mPacketInfo.end())
{
auto error = strprintf("Unknown packet 0x%x received.", msgId);
logger->error(error);
break;
}
auto packetInfo = packetInfoIt->second;
// Determine the length of the packet
uint16_t len = packetInfo->length;
if (len == VAR)
{
// We have not received the length yet
if (mInSize < 4)
break;
len = readWord(2);
if (len < 4)
{
auto error = strprintf("Variable length packet 0x%x has invalid length %d.",
msgId, len);
logger->error(error);
break;
}
}
// The message has not been fully received yet
if (mInSize < len)
break;
MessageIn message(mInBuffer, len);
// Dispatch the message to the appropriate handler
auto iter = mMessageHandlers.find(msgId);
if (iter != mMessageHandlers.end())
{
#ifdef DEBUG
logger->log("Handling %s (0x%x) of length %d", packetInfo->name, msgId, len);
#endif
iter->second->handleMessage(message);
}
else
{
logger->log("Unhandled %s (0x%x) of length %d", packetInfo->name, msgId, len);
}
skip(len);
}
}
void Network::flush()
{
if (!mOutSize || mState != CONNECTED)
return;
int ret;
MutexLocker lock(&mMutex);
ret = SDLNet_TCP_Send(mSocket, mOutBuffer, mOutSize);
if (ret < (int)mOutSize)
{
setError("Error in SDLNet_TCP_Send(): " +
std::string(SDLNet_GetError()));
}
mOutSize = 0;
}
void Network::skip(int len)
{
MutexLocker lock(&mMutex);
mToSkip += len;
if (!mInSize)
return;
if (mInSize >= mToSkip)
{
mInSize -= mToSkip;
memmove(mInBuffer, mInBuffer + mToSkip, mInSize);
mToSkip = 0;
}
else
{
mToSkip -= mInSize;
mInSize = 0;
}
}
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, ((Uint32)500));
int ret;
switch (numReady)
{
case -1:
logger->log("Error: SDLNet_CheckSockets");
// FALLTHROUGH
case 0:
break;
case 1:
{
// Receive data from the socket
MutexLocker lock(&mMutex);
ret = SDLNet_TCP_Recv(mSocket, mInBuffer + mInSize, BUFFER_SIZE - mInSize);
if (!ret)
{
// We got disconnected
mState = IDLE;
logger->log("Disconnected.");
}
else if (ret < 0)
{
setError(_("Connection to server terminated. ") +
std::string(SDLNet_GetError()));
}
else
{
mInSize += ret;
if (mToSkip)
{
if (mInSize >= mToSkip)
{
mInSize -= mToSkip;
memmove(mInBuffer, mInBuffer + mToSkip, mInSize);
mToSkip = 0;
}
else
{
mToSkip -= mInSize;
mInSize = 0;
}
}
}
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);
}
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)
{
uint16_t value;
memcpy(&value, mInBuffer + pos, sizeof(uint16_t));
return SDL_SwapLE16(value);
}
} // namespace TmwAthena