/* * The Mana World * 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 "network.h" #include #include #include #include "messagein.h" #include "../log.h" #include "../main.h" /** 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, 0, 0, 0, 55, 17, 3, 37, 46, -1, 23, -1, 3,108, 3, 2, 3, 28, 19, 11, 3, -1, 9, 5, 54, 53, 58, 60, 41, 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, // #0x200 26, 0, 0, 0, 18, 0, 0, 0, 0, 0, 0, 19, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }; unsigned int buffer_size = 65536; char *in = NULL; char *out = NULL; unsigned int in_size = 0; unsigned int out_size = 0; bool connectionOpen = false; TCPsocket sock; SDLNet_SocketSet set; char *iptostring(int address) { static char asciiIP[16]; sprintf(asciiIP, "%i.%i.%i.%i", (unsigned char)(address), (unsigned char)(address >> 8), (unsigned char)(address >> 16), (unsigned char)(address >> 24)); return asciiIP; } int open_session(const char* address, short port) { assert(!connectionOpen); // Initialize SDL_net if (SDLNet_Init() == -1) { logger->log("Error in SDLNet_Init(): %s", SDLNet_GetError()); return -1; } IPaddress ip; // Resolve host name if (SDLNet_ResolveHost(&ip, address, port) == -1) { logger->log("Error in SDLNet_ResolveHost(): %s", SDLNet_GetError()); return -1; } // Create the socket for the current session sock = SDLNet_TCP_Open(&ip); if (!sock) { logger->log("Error in SDLNet_TCP_Open(): %s", SDLNet_GetError()); return -1; } // Create a socket set to listen to socket set = SDLNet_AllocSocketSet(1); if (!set) { logger->log("Error in SDLNet_AllocSocketSet(): %s", SDLNet_GetError()); return -1; } // Add the socket to the set int ret = SDLNet_TCP_AddSocket(set, sock); if (ret == -1) { logger->log("Error in SDLNet_AddSocket(): %s", SDLNet_GetError()); return -1; } // Init buffers in = (char*)malloc(buffer_size); out = (char*)malloc(buffer_size); memset(in, '\0', buffer_size); memset(out, '\0', buffer_size); in_size = 0; out_size = 0; logger->log("Network::Started session with %s:%i", address, port); connectionOpen = true; return 0; } void close_session() { assert(connectionOpen); // Remove the socket from the socket set int ret = SDLNet_TCP_DelSocket(set, sock); if (ret == -1) { logger->log("Error in SDLNet_DelSocket(): %s", SDLNet_GetError()); } // Close the TCP connection SDLNet_TCP_Close(sock); // Free the socket set SDLNet_FreeSocketSet(set); set = NULL; // Clear buffers if (in != NULL) { free(in); in = NULL; } if (out != NULL) { free(out); out = NULL; } in_size = 0; out_size = 0; // Shutdown the network API SDLNet_Quit(); logger->log("Network::Closed session"); connectionOpen = false; } void flush() { // Send all available data, waits if not all data can be sent immediately if (out_size > 0) { int ret = SDLNet_TCP_Send(sock, (char*)out, out_size); if (ret < (int)out_size) { logger->log("Error in SDLNet_TCP_Send(): %s", SDLNet_GetError()); errorMessage = "You got disconnected from server"; state = ERROR_STATE; return; } out_size -= ret; } int numReady = SDLNet_CheckSockets(set, 0); if (numReady == -1) { logger->log("Error: SDLNet_CheckSockets"); return; } else if (numReady == 0) // any socket ready { return; } else if (numReady == 1) // one socket is ready { // Receive data from the socket int ret = SDLNet_TCP_Recv(sock, in + in_size, buffer_size - in_size); if (ret <= 0) { logger->log("Error in SDLNet_TCP_Recv(): %s", SDLNet_GetError()); errorMessage = "You got disconnected from server"; state = ERROR_STATE; return; } else { in_size += ret; } } else // more than one socket is ready.. this should not happen since we only listen once socket. { logger->log("Error in SDLNet_TCP_Recv(), %d sockets are ready : %s", numReady, SDLNet_GetError()); errorMessage = "You got disconnected from server"; state = ERROR_STATE; return; } } unsigned short readWord(int pos) { #if SDL_BYTEORDER == SDL_BIG_ENDIAN return SDL_Swap16((*(unsigned short*)(in+(pos)))); #else return (*(unsigned short *)(in+(pos))); #endif } MessageIn get_next_message() { // At least 2 bytes should be received for the message ID while (in_size < 2 && state != ERROR_STATE) flush(); int length = packet_lengths[readWord(0)]; if (length == -1) { // Another 2 bytes should be received for the length while (in_size < 4) flush(); length = readWord(2); } #ifdef DEBUG printf("Received packet 0x%x of length %d\n", readWord(0), length); #endif // Make sure the whole packet is received while (in_size < static_cast(length) && state != ERROR_STATE) flush(); return MessageIn(in, length); } void skip(int len) { memcpy(in, in + len, in_size - len); in_size -= len; }