ref: a46588d36c95922d3b42c08c4ccec54b32b94b1c
dir: /src/i_net.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // $Id: i_net.c 58 2005-08-30 22:15:11Z fraggle $ // // Copyright(C) 1993-1996 Id Software, Inc. // Copyright(C) 2005 Simon Howard // // 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 (at your option) 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, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // // $Log$ // Revision 1.7 2005/08/30 22:15:11 fraggle // More Windows fixes // // Revision 1.6 2005/08/30 22:11:10 fraggle // Windows fixes // // Revision 1.5 2005/08/12 16:54:15 fraggle // Port network code to use SDL_net // // Revision 1.4 2005/08/04 18:42:15 fraggle // Silence compiler warnings // // Revision 1.3 2005/07/23 18:56:07 fraggle // Remove unneccessary pragmas // // Revision 1.2 2005/07/23 16:44:55 fraggle // Update copyright to GNU GPL // // Revision 1.1.1.1 2005/07/23 16:20:32 fraggle // Initial import // // // DESCRIPTION: // //----------------------------------------------------------------------------- static const char rcsid[] = "$Id: i_net.c 58 2005-08-30 22:15:11Z fraggle $"; #include <stdlib.h> #include <string.h> #include <stdio.h> #include <SDL_net.h> #include "i_system.h" #include "d_event.h" #include "d_net.h" #include "m_argv.h" #include "doomstat.h" #include "i_net.h" void NetSend (void); boolean NetListen (void); // // NETWORKING // int DOOMPORT = 8626; #ifndef NO_SDL_NET static UDPsocket udpsocket; static UDPpacket *packet; static IPaddress sendaddress[MAXNETNODES]; void (*netget) (void); void (*netsend) (void); unsigned short host_to_net16(unsigned int value) { union { unsigned short s; char b[2]; } data; SDLNet_Write16(value, data.b); return data.s; } unsigned short net_to_host16(unsigned int value) { unsigned short s = value; return SDLNet_Read16(&s); } unsigned long host_to_net32(unsigned int value) { union { unsigned long l; char b[4]; } data; SDLNet_Write32(value, data.b); return data.l; } unsigned long net_to_host32(unsigned int value) { union { unsigned long l; char b[4]; } data; data.l = value; return SDLNet_Read32(data.b); } // // PacketSend // void PacketSend (void) { int c; doomdata_t *sw; sw = (doomdata_t *) packet->data; // byte swap sw->checksum = host_to_net32(netbuffer->checksum); sw->player = netbuffer->player; sw->retransmitfrom = netbuffer->retransmitfrom; sw->starttic = netbuffer->starttic; sw->numtics = netbuffer->numtics; for (c=0 ; c< netbuffer->numtics ; c++) { sw->cmds[c].forwardmove = netbuffer->cmds[c].forwardmove; sw->cmds[c].sidemove = netbuffer->cmds[c].sidemove; sw->cmds[c].angleturn = host_to_net16(netbuffer->cmds[c].angleturn); sw->cmds[c].consistancy = host_to_net16(netbuffer->cmds[c].consistancy); sw->cmds[c].chatchar = netbuffer->cmds[c].chatchar; sw->cmds[c].buttons = netbuffer->cmds[c].buttons; } packet->len = doomcom->datalength; packet->address = sendaddress[doomcom->remotenode]; if (!SDLNet_UDP_Send(udpsocket, -1, packet)) { I_Error("Error sending packet: %s", SDLNet_GetError()); } } // // PacketGet // void PacketGet (void) { int i; int c; doomdata_t *sw; int packets_read; packets_read = SDLNet_UDP_Recv(udpsocket, packet); if (packets_read < 0) { I_Error("Error reading packet: %s\n", SDLNet_GetError()); } if (packets_read == 0) { doomcom->remotenode = -1; return; } // find remote node number for (i=0 ; i<doomcom->numnodes ; i++) if (packet->address.host == sendaddress[i].host && packet->address.port == sendaddress[i].port) break; if (i == doomcom->numnodes) { // packet is not from one of the players (new game broadcast) doomcom->remotenode = -1; // no packet return; } doomcom->remotenode = i; // good packet from a game player doomcom->datalength = packet->len; sw = (doomdata_t *) packet->data; // byte swap netbuffer->checksum = net_to_host32(sw->checksum); netbuffer->player = sw->player; netbuffer->retransmitfrom = sw->retransmitfrom; netbuffer->starttic = sw->starttic; netbuffer->numtics = sw->numtics; for (c=0 ; c< netbuffer->numtics ; c++) { netbuffer->cmds[c].forwardmove = sw->cmds[c].forwardmove; netbuffer->cmds[c].sidemove = sw->cmds[c].sidemove; netbuffer->cmds[c].angleturn = net_to_host16(sw->cmds[c].angleturn); netbuffer->cmds[c].consistancy = net_to_host16(sw->cmds[c].consistancy); netbuffer->cmds[c].chatchar = sw->cmds[c].chatchar; netbuffer->cmds[c].buttons = sw->cmds[c].buttons; } } // // I_InitNetwork // void I_InitNetwork (void) { int i; int p; doomcom = malloc (sizeof (*doomcom) ); memset (doomcom, 0, sizeof(*doomcom) ); // set up for network i = M_CheckParm ("-dup"); if (i && i< myargc-1) { doomcom->ticdup = myargv[i+1][0]-'0'; if (doomcom->ticdup < 1) doomcom->ticdup = 1; if (doomcom->ticdup > 9) doomcom->ticdup = 9; } else doomcom-> ticdup = 1; if (M_CheckParm ("-extratic")) doomcom-> extratics = 1; else doomcom-> extratics = 0; p = M_CheckParm ("-port"); if (p && p<myargc-1) { DOOMPORT = atoi (myargv[p+1]); printf ("using alternate port %i\n",DOOMPORT); } // parse network game options, // -net <consoleplayer> <host> <host> ... i = M_CheckParm ("-net"); if (!i) { // single player game netgame = false; doomcom->id = DOOMCOM_ID; doomcom->numplayers = doomcom->numnodes = 1; doomcom->deathmatch = false; doomcom->consoleplayer = 0; return; } netsend = PacketSend; netget = PacketGet; netgame = true; // parse player number and host list doomcom->consoleplayer = myargv[i+1][0]-'1'; doomcom->numnodes = 1; // this node for sure SDLNet_Init(); i++; while (++i < myargc && myargv[i][0] != '-') { if (SDLNet_ResolveHost(&sendaddress[doomcom->numnodes], myargv[i], DOOMPORT)) { I_Error("Unable to resolve %s", myargv[i]); } doomcom->numnodes++; } doomcom->id = DOOMCOM_ID; doomcom->numplayers = doomcom->numnodes; // build message to receive udpsocket = SDLNet_UDP_Open(DOOMPORT); packet = SDLNet_AllocPacket(5000); } void I_NetCmd (void) { if (doomcom->command == CMD_SEND) { netsend (); } else if (doomcom->command == CMD_GET) { netget (); } else I_Error ("Bad net cmd: %i\n",doomcom->command); } #else void I_NetCmd(void) { } void I_InitNetwork (void) { doomcom = malloc (sizeof (*doomcom) ); memset (doomcom, 0, sizeof(*doomcom) ); doomcom->ticdup = 1; doomcom->extratics = 0; // single player game netgame = false; doomcom->id = DOOMCOM_ID; doomcom->numplayers = doomcom->numnodes = 1; doomcom->deathmatch = false; doomcom->consoleplayer = 0; return; } #endif /* #ifndef NO_SDL_NET */