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/*
* The Mana World Server
* Copyright 2004 The Mana World Development Team
*
* This file is part of The Mana World.
*
* The Mana World 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.
*
* The Mana World 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 The Mana World; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
*/
#include <iostream>
#include <vector>
#include <sstream>
#include "connectionhandler.h"
#include "netsession.h"
#include "utils/logger.h"
#ifdef SCRIPT_SUPPORT
#include "script.h"
#endif
#define MAX_CLIENTS 1024
/**
* TEMPORARY
* Split a string into a std::vector delimiting elements by 'split'. This
* function could be used for ASCII message handling (as we do not have
* a working client yet, using ASCII allows tools like Netcat to be used
* to test server functionality).
*
* This function may seem unoptimized, except it is this way to allow for
* thread safety.
*/
std::vector<std::string> stringSplit(const std::string &str,
const std::string &split)
{
std::vector<std::string> result; // temporary result
unsigned int i;
unsigned int last = 0;
// iterate through string
for (i = 0; i < str.length(); i++) {
if (str.compare(i, split.length(), split.c_str(), split.length()) == 0) {
result.push_back(str.substr(last, i - last));
last = i + 1;
}
}
// add remainder of string
if (last < str.length()) {
result.push_back(str.substr(last, str.length()));
}
return result;
}
/**
* Convert a IP4 address into its string representation
*/
std::string ip4ToString(unsigned int ip4addr)
{
std::stringstream ss;
ss << (ip4addr & 0x000000ff) << "."
<< ((ip4addr & 0x0000ff00) >> 8) << "."
<< ((ip4addr & 0x00ff0000) >> 16) << "."
<< ((ip4addr & 0xff000000) >> 24);
return ss.str();
}
////////////////
ClientData::ClientData():
inp(0)
{
}
ConnectionHandler::ConnectionHandler()
{
}
void ConnectionHandler::startListen(ListenThreadData *ltd)
{
// Allocate a socket set
SDLNet_SocketSet set = SDLNet_AllocSocketSet(MAX_CLIENTS);
if (!set) {
LOG_FATAL("SDLNet_AllocSocketSet: " << SDLNet_GetError())
exit(1);
}
// Add the server socket to the socket set
if (SDLNet_TCP_AddSocket(set, ltd->socket) < 0) {
LOG_FATAL("SDLNet_AddSocket: " << SDLNet_GetError())
exit(1);
}
// Keep checking for socket activity while running
while (ltd->running) {
int numready = SDLNet_CheckSockets(set, 100);
if (numready == -1) {
LOG_ERROR("SDLNet_CheckSockets: " << SDLNet_GetError())
// When this is a system error, perror may help us
perror("SDLNet_CheckSockets");
}
else if (numready > 0) {
LOG_INFO(numready << " sockets with activity!")
// Check server socket
if (SDLNet_SocketReady(ltd->socket)) {
TCPsocket client = SDLNet_TCP_Accept(ltd->socket);
if (client) {
// Add the client socket to the socket set
if (SDLNet_TCP_AddSocket(set, client) < 0) {
LOG_ERROR("SDLNet_AddSocket: " << SDLNet_GetError())
}
else {
NetComputer *comp = new NetComputer(this);
clients[comp] = client;
computerConnected(comp);
LOG_INFO(clients.size() << " clients connected")
}
}
}
// Check client sockets
std::map<NetComputer*, TCPsocket>::iterator i;
for (i = clients.begin(); i != clients.end(); ) {
NetComputer *comp = (*i).first;
TCPsocket s = (*i).second;
if (SDLNet_SocketReady(s)) {
char buffer[1024];
int result = SDLNet_TCP_Recv(s, buffer, 1024);
if (result <= 0) {
SDLNet_TCP_DelSocket(set, s);
SDLNet_TCP_Close(s);
computerDisconnected(comp);
delete comp;
comp = NULL;
}
else {
// Copy the incoming data to the in buffer of this
// client
buffer[result] = 0;
LOG_INFO("Received " << buffer);
#ifdef SCRIPT_SUPPORT
// this could be good if you wanted to extend the
// server protocol using a scripting language. This
// could be attained by using allowing scripts to
// "hook" certain messages.
//script->message(buffer);
#endif
// if the scripting subsystem didn't hook the message
// it will be handled by the default message handler.
// convert the client IP address to string representation
std::string ipaddr = ip4ToString(SDLNet_TCP_GetPeerAddress(s)->host);
// generate packet
Packet *packet = new Packet(buffer, strlen(buffer));
MessageIn msg(packet); // (MessageIn frees packet)
// make sure that the packet is big enough
if (strlen(buffer) >= 4) {
unsigned int messageType = (unsigned int)*packet->data;
if (handlers.find(messageType) != handlers.end()) {
// send message to appropriate handler
handlers[messageType]->receiveMessage(*comp, msg);
} else {
// bad message (no registered handler)
LOG_ERROR("Unhandled message received from "
<< ipaddr);
}
} else {
LOG_ERROR("Message too short from " << ipaddr);
}
//
}
}
// Traverse to next client, possibly deleting current
if (comp == NULL) {
std::map<NetComputer*, TCPsocket>::iterator ii = i;
ii++;
clients.erase(i);
i = ii;
}
else {
i++;
}
}
}
}
// - Disconnect all clients (close sockets)
SDLNet_FreeSocketSet(set);
}
void ConnectionHandler::computerConnected(NetComputer *comp)
{
LOG_INFO("A client connected!")
}
void ConnectionHandler::computerDisconnected(NetComputer *comp)
{
LOG_INFO("A client disconnected!")
}
void ConnectionHandler::registerHandler(
unsigned int msgId, MessageHandler *handler)
{
handlers[msgId] = handler;
}
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