440 lines
12 KiB
C
Executable file
440 lines
12 KiB
C
Executable file
/* $Id: linuxnet.c,v 1.1.1.1 2006/03/17 19:53:47 zicodxx Exp $ */
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/*
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THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
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END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
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ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
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SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
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FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
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AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
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COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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/*
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*
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* Linux lower-level network code.
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* implements functions declared in include/ipx.h
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <conf.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <netinet/in.h> /* for htons & co. */
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#include "pstypes.h"
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#include "args.h"
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#include "error.h"
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#include "ipx.h"
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#include "ipx_drv.h"
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#ifdef NATIVE_IPX
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# include "ipx_bsd.h"
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#endif //NATIVE_IPX
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#ifdef KALINIX
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#include "ipx_kali.h"
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#endif
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#include "error.h"
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#include "../../main/player.h" /* for Players */
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#include "../../main/multi.h" /* for NetPlayers */
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//added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
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//#include "checker.h"
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//end addition -MM
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#include "byteswap.h"
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#define MAX_IPX_DATA 576
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int ipx_fd;
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ipx_socket_t ipx_socket_data;
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ubyte ipx_installed=0;
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ushort ipx_socket = 0;
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uint ipx_network = 0;
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ubyte ipx_MyAddress[10];
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int ipx_packetnum = 0; /* Sequence number */
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//int ipx_packettotal=0,ipx_lastspeed=0;
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/* User defined routing stuff */
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typedef struct user_address {
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ubyte network[4];
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ubyte node[6];
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ubyte address[6];
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} user_address;
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#define MAX_USERS 64
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int Ipx_num_users = 0;
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user_address Ipx_users[MAX_USERS];
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#define MAX_NETWORKS 64
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int Ipx_num_networks = 0;
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uint Ipx_networks[MAX_NETWORKS];
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int ipx_general_PacketReady(ipx_socket_t *s) {
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fd_set set;
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struct timeval tv;
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FD_ZERO(&set);
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FD_SET(s->fd, &set);
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tv.tv_sec = tv.tv_usec = 0;
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if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
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return 1;
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else
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return 0;
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}
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struct ipx_driver *driver;
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extern struct ipx_driver ipx_ip;
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ubyte * ipx_get_my_server_address()
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{
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return (ubyte *)&ipx_network;
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}
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ubyte * ipx_get_my_local_address()
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{
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return (ubyte *)(ipx_MyAddress + 4);
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}
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void arch_ipx_set_driver(int ipx_driver)
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{
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switch(ipx_driver) {
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#ifdef NATIVE_IPX
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case IPX_DRIVER_IPX: driver = &ipx_bsd; break;
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#endif //NATIVE_IPX
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#ifdef KALINIX
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case IPX_DRIVER_KALI: driver = &ipx_kali; break;
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#endif
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case IPX_DRIVER_UDP: driver = &ipx_ip; break;
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default: Int3();
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}
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}
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int ipx_init(int socket_number)
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{
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if (GameArg.MplIpxNetwork)
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{
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unsigned long n = strtol(GameArg.MplIpxNetwork, NULL, 16);
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ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
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ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
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printf("IPX: Using network %08x\n", (unsigned int)n);
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}
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if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
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return IPX_NOT_INSTALLED;
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}
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driver->GetMyAddress();
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memcpy(&ipx_network, ipx_MyAddress, 4);
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Ipx_num_networks = 0;
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memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
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ipx_installed = 1;
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atexit(ipx_close);
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return IPX_INIT_OK;
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}
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void ipx_close()
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{
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if (ipx_installed)
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driver->CloseSocket(&ipx_socket_data);
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ipx_installed = 0;
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}
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int ipx_get_packet_data( ubyte * data )
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{
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struct ipx_recv_data rd;
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char buf[MAX_IPX_DATA];
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//killed 6-15-99 to get rid of compile warnings - OE
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// uint best_id = 0;
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// uint pkt_num;
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//end kill - OE
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int size;
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int best_size = 0;
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//edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
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//--killed-- Like the original, only take latest packet, throw away rest
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//do _NOT_ throw them away!
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while (driver->PacketReady(&ipx_socket_data)) {
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if ((size =
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driver->ReceivePacket(&ipx_socket_data, buf,
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sizeof(buf), &rd)) > 4) {
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if (!memcmp(rd.src_network, ipx_MyAddress, 10))
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continue; /* don't get own pkts */
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//--killed-- pkt_num = INTEL_INT(*(uint *)buf);
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//--killed-- if (pkt_num >= best_id) {
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memcpy(data, buf + 4, size - 4);
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return size-4;
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//--killed-- best_id = pkt_num;
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//--killed-- best_size = size - 4;
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//--killed-- }
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//end edit -MM
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}
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}
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return best_size;
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}
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void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
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{
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u_char buf[MAX_IPX_DATA];
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IPXPacket_t ipx_header;
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Assert(datasize <= MAX_IPX_DATA+4);
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memcpy(ipx_header.Destination.Network, network, 4);
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memcpy(ipx_header.Destination.Node, immediate_address, 6);
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*(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
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ipx_header.PacketType = 4; /* Packet Exchange */
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*(uint *)buf = INTEL_INT(ipx_packetnum);
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ipx_packetnum++;
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//ipx_packettotal+=datasize+4;
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//if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
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//{
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// ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
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// printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
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// ipx_packetnum/(int)f2i(Players[Player_num].time_level),
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// ipx_packettotal/(int)f2i(Players[Player_num].time_level));
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//}
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memcpy(buf + 4, data, datasize);
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driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
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}
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void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
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{
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// let's hope Linux knows how to route it
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memcpy( local_target, node, 6 );
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}
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void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
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{
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int i, j;
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ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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ubyte local_address[6];
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// Set to all networks besides mine
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for (i=0; i<Ipx_num_networks; i++ ) {
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if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) ) {
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ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
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ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
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} else {
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ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
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}
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}
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//OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
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// Send directly to all users not on my network or in the network list.
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for (i=0; i<Ipx_num_users; i++ ) {
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if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) ) {
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for (j=0; j<Ipx_num_networks; j++ ) {
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if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
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goto SkipUser;
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}
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ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
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SkipUser:
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j = 0;
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}
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}
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}
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// Sends a non-localized packet... needs 4 byte server, 6 byte address
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void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
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{
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ubyte local_address[6];
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#ifdef WORDS_NEED_ALIGNMENT
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int zero = 0;
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if (memcmp(server, &zero, 4)) {
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#else // WORDS_NEED_ALIGNMENT
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if ((*(uint *)server) != 0) {
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#endif // WORDS_NEED_ALIGNMENT
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ipx_get_local_target( server, address, local_address );
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ipx_send_packet_data( data, datasize, server, address, local_address );
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} else {
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// Old method, no server info.
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ipx_send_packet_data( data, datasize, server, address, address );
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}
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}
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int ipx_check_ready_to_join(ubyte *server, ubyte *node){
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if (!driver->CheckReadyToJoin)
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return 1;
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return driver->CheckReadyToJoin(server,node);
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}
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int ipx_change_default_socket( ushort socket_number )
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{
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if ( !ipx_installed ) return -3;
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driver->CloseSocket(&ipx_socket_data);
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if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
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return -3;
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}
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return 0;
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}
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void ipx_read_user_file(char * filename)
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{
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FILE * fp;
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user_address tmp;
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char temp_line[132], *p1;
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int n, ln=0, x;
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if (!filename) return;
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Ipx_num_users = 0;
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fp = fopen( filename, "rt" );
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if ( !fp ) return;
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printf( "Broadcast Users:\n" );
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while (fgets(temp_line, 132, fp)) {
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ln++;
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p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
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p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
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#if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
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if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
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for (n = 0; n < 4; n++) {
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if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
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break;
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tmp.network[n] = x;
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}
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if (n != 4)
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continue;
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for (n = 0; n < 6; n++) {
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if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
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break;
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tmp.node[n] = x;
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}
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if (n != 6)
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continue;
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} else
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continue;
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#else
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n = sscanf( temp_line, "%2x%2x%2x%2x/%2x%2x%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3], &tmp.node[0], &tmp.node[1], &tmp.node[2],&tmp.node[3], &tmp.node[4], &tmp.node[5] );
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if ( n != 10 ) continue;
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#endif
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if ( Ipx_num_users < MAX_USERS ) {
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ubyte * ipx_real_buffer = (ubyte *)&tmp;
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ipx_get_local_target( tmp.network, tmp.node, tmp.address );
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Ipx_users[Ipx_num_users++] = tmp;
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printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
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printf( "%02X%02X%02X%02X%02X%02X\n", ipx_real_buffer[4],ipx_real_buffer[5],ipx_real_buffer[6],ipx_real_buffer[7],ipx_real_buffer[8],ipx_real_buffer[9] );
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} else {
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printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
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fclose(fp);
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return;
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}
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}
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fclose(fp);
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}
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void ipx_read_network_file(char * filename)
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{
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FILE * fp;
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user_address tmp;
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char temp_line[132], *p1;
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int i, n, ln=0, x;
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if (!filename) return;
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fp = fopen( filename, "rt" );
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if ( !fp ) return;
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printf( "Using Networks:\n" );
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for (i=0; i<Ipx_num_networks; i++ ) {
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ubyte * n1 = (ubyte *)&Ipx_networks[i];
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printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
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}
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while (fgets(temp_line, 132, fp)) {
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ln++;
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p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
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p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
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#if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
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if (strlen(temp_line) >= 8) {
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for (n = 0; n < 4; n++) {
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if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
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break;
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tmp.network[n] = x;
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}
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if (n != 4)
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continue;
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} else
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continue;
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#else
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n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
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if ( n != 4 ) continue;
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#endif
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if ( Ipx_num_networks < MAX_NETWORKS ) {
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int j;
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for (j=0; j<Ipx_num_networks; j++ )
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if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
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break;
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if ( j >= Ipx_num_networks ) {
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memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
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printf(" %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
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}
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} else {
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printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
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fclose(fp);
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return;
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}
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}
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fclose(fp);
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}
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// Initalizes the protocol-specific member of the netgame packet.
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void ipx_init_netgame_aux_data(ubyte buf[])
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{
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if(driver->InitNetgameAuxData)
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driver->InitNetgameAuxData(&ipx_socket_data, buf);
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}
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// Handles the protocol-specific member of the netgame packet.
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int ipx_handle_netgame_aux_data(const ubyte buf[])
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{
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if(driver->HandleNetgameAuxData)
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return driver->HandleNetgameAuxData(&ipx_socket_data, buf);
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return 0;
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}
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// Notifies the protocol that we're done with a particular game
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void ipx_handle_leave_game()
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{
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if(driver->HandleLeaveGame)
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driver->HandleLeaveGame(&ipx_socket_data);
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}
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// Send a packet to every member of the game.
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int ipx_send_game_packet(ubyte *data, int datasize)
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{
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if(driver->SendGamePacket) {
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u_char buf[MAX_IPX_DATA];
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*(uint *)buf = ipx_packetnum++;
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memcpy(buf + 4, data, datasize);
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*(uint *)data = ipx_packetnum++;
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return driver->SendGamePacket(&ipx_socket_data, buf, datasize + 4);
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} else {
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// Loop through all the players unicasting the packet.
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int i;
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//printf("Sending game packet: N_players = %i\n", N_players);
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for(i=0; i<N_players; i++) {
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if(Players[i].connected && (i != Player_num))
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ipx_send_packet_data(data, datasize, NetPlayers.players[i].network.ipx.server, NetPlayers.players[i].network.ipx.node,Players[i].net_address);
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}
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return datasize;
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}
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return 0;
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}
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