ref: 14737bd64c6b7f0a02c4f26055d5f9a93c6cac53
dir: /src/i_net.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // $Id: i_net.c 18 2005-07-23 18:56:07Z 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 1.3 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 18 2005-07-23 18:56:07Z fraggle $"; #include <stdlib.h> #include <string.h> #include <stdio.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <errno.h> #include <unistd.h> #include <netdb.h> #include <sys/ioctl.h> #include "i_system.h" #include "d_event.h" #include "d_net.h" #include "m_argv.h" #include "doomstat.h" #include "i_net.h" // For some odd reason... #define ntohl(x) \ ((unsigned long int)((((unsigned long int)(x) & 0x000000ffU) << 24) | \ (((unsigned long int)(x) & 0x0000ff00U) << 8) | \ (((unsigned long int)(x) & 0x00ff0000U) >> 8) | \ (((unsigned long int)(x) & 0xff000000U) >> 24))) #define ntohs(x) \ ((unsigned short int)((((unsigned short int)(x) & 0x00ff) << 8) | \ (((unsigned short int)(x) & 0xff00) >> 8))) \ #define htonl(x) ntohl(x) #define htons(x) ntohs(x) void NetSend (void); boolean NetListen (void); // // NETWORKING // int DOOMPORT = (IPPORT_USERRESERVED +0x1d ); int sendsocket; int insocket; struct sockaddr_in sendaddress[MAXNETNODES]; void (*netget) (void); void (*netsend) (void); // // UDPsocket // int UDPsocket (void) { int s; // allocate a socket s = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); if (s<0) I_Error ("can't create socket: %s",strerror(errno)); return s; } // // BindToLocalPort // void BindToLocalPort ( int s, int port ) { int v; struct sockaddr_in address; memset (&address, 0, sizeof(address)); address.sin_family = AF_INET; address.sin_addr.s_addr = INADDR_ANY; address.sin_port = port; v = bind (s, (void *)&address, sizeof(address)); if (v == -1) I_Error ("BindToPort: bind: %s", strerror(errno)); } // // PacketSend // void PacketSend (void) { int c; doomdata_t sw; // byte swap sw.checksum = htonl(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 = htons(netbuffer->cmds[c].angleturn); sw.cmds[c].consistancy = htons(netbuffer->cmds[c].consistancy); sw.cmds[c].chatchar = netbuffer->cmds[c].chatchar; sw.cmds[c].buttons = netbuffer->cmds[c].buttons; } //printf ("sending %i\n",gametic); c = sendto (sendsocket , &sw, doomcom->datalength ,0,(void *)&sendaddress[doomcom->remotenode] ,sizeof(sendaddress[doomcom->remotenode])); // if (c == -1) // I_Error ("SendPacket error: %s",strerror(errno)); } // // PacketGet // void PacketGet (void) { int i; int c; struct sockaddr_in fromaddress; int fromlen; doomdata_t sw; fromlen = sizeof(fromaddress); c = recvfrom (insocket, &sw, sizeof(sw), 0 , (struct sockaddr *)&fromaddress, &fromlen ); if (c == -1 ) { if (errno != EWOULDBLOCK) I_Error ("GetPacket: %s",strerror(errno)); doomcom->remotenode = -1; // no packet return; } { static int first=1; if (first) printf("len=%d:p=[0x%x 0x%x] \n", c, *(int*)&sw, *((int*)&sw+1)); first = 0; } // find remote node number for (i=0 ; i<doomcom->numnodes ; i++) if ( fromaddress.sin_addr.s_addr == sendaddress[i].sin_addr.s_addr ) 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 = c; // byte swap netbuffer->checksum = ntohl(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 = ntohs(sw.cmds[c].angleturn); netbuffer->cmds[c].consistancy = ntohs(sw.cmds[c].consistancy); netbuffer->cmds[c].chatchar = sw.cmds[c].chatchar; netbuffer->cmds[c].buttons = sw.cmds[c].buttons; } } int GetLocalAddress (void) { char hostname[1024]; struct hostent* hostentry; // host information entry int v; // get local address v = gethostname (hostname, sizeof(hostname)); if (v == -1) I_Error ("GetLocalAddress : gethostname: errno %d",errno); hostentry = gethostbyname (hostname); if (!hostentry) I_Error ("GetLocalAddress : gethostbyname: couldn't get local host"); return *(int *)hostentry->h_addr_list[0]; } // // I_InitNetwork // void I_InitNetwork (void) { boolean trueval = true; int i; int p; struct hostent* hostentry; // host information entry 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 i++; while (++i < myargc && myargv[i][0] != '-') { sendaddress[doomcom->numnodes].sin_family = AF_INET; sendaddress[doomcom->numnodes].sin_port = htons(DOOMPORT); if (myargv[i][0] == '.') { sendaddress[doomcom->numnodes].sin_addr.s_addr = inet_addr (myargv[i]+1); } else { hostentry = gethostbyname (myargv[i]); if (!hostentry) I_Error ("gethostbyname: couldn't find %s", myargv[i]); sendaddress[doomcom->numnodes].sin_addr.s_addr = *(int *)hostentry->h_addr_list[0]; } doomcom->numnodes++; } doomcom->id = DOOMCOM_ID; doomcom->numplayers = doomcom->numnodes; // build message to receive insocket = UDPsocket (); BindToLocalPort (insocket,htons(DOOMPORT)); ioctl (insocket, FIONBIO, &trueval); sendsocket = UDPsocket (); } 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); }