1 /* $Id: linuxnet.c,v 1.8 2003/03/19 23:20:09 btb Exp $ */
2 /*
3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
4 SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
7 IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
9 FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
12 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
13 */
14
15 /*
16 *
17 * Linux net
18 *
19 */
20
21 #ifdef HAVE_CONFIG_H
22 #include <conf.h>
23 #endif
24
25 #ifdef NETWORK
26 #include <stdlib.h>
27 #include <stdio.h>
28 #include <string.h>
29 #include <sys/types.h>
30 #include <sys/time.h>
31 #include <netinet/in.h> /* for htons & co. */
32
33 #include "pstypes.h"
34 #include "args.h"
35
36 #include "ipx_drv.h"
37 #include "ipx_bsd.h"
38 #include "ipx_kali.h"
39 #include "ipx_udp.h"
40 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
41 //#include "checker.h"
42 //end addition -MM
43 #define MAX_IPX_DATA 576
44
45 int ipx_fd;
46 ipx_socket_t ipx_socket_data;
47 ubyte ipx_installed=0;
48 ushort ipx_socket = 0;
49 uint ipx_network = 0;
50 ubyte ipx_MyAddress[10];
51 int ipx_packetnum = 0; /* Sequence number */
52 //int ipx_packettotal=0,ipx_lastspeed=0;
53
54 /* User defined routing stuff */
55 typedef struct user_address {
56 ubyte network[4];
57 ubyte node[6];
58 ubyte address[6];
59 } user_address;
60 #define MAX_USERS 64
61 int Ipx_num_users = 0;
62 user_address Ipx_users[MAX_USERS];
63
64 #define MAX_NETWORKS 64
65 int Ipx_num_networks = 0;
66 uint Ipx_networks[MAX_NETWORKS];
67
68 void ipx_close(void);
69
ipx_general_PacketReady(ipx_socket_t * s)70 int ipx_general_PacketReady(ipx_socket_t *s) {
71 fd_set set;
72 struct timeval tv;
73
74 FD_ZERO(&set);
75 FD_SET(s->fd, &set);
76 tv.tv_sec = tv.tv_usec = 0;
77 if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
78 return 1;
79 else
80 return 0;
81 }
82
83 struct ipx_driver *driver = &ipx_bsd;
84
ipx_get_my_server_address()85 ubyte * ipx_get_my_server_address()
86 {
87 return (ubyte *)&ipx_network;
88 }
89
ipx_get_my_local_address()90 ubyte * ipx_get_my_local_address()
91 {
92 return (ubyte *)(ipx_MyAddress + 4);
93 }
94
95 //---------------------------------------------------------------
96 // Initializes all IPX internals.
97 // If socket_number==0, then opens next available socket.
98 // Returns: 0 if successful.
99 // -1 if socket already open.
100 // -2 if socket table full.
101 // -3 if IPX not installed.
102 // -4 if couldn't allocate low dos memory
103 // -5 if error with getting internetwork address
ipx_init(int socket_number,int show_address)104 int ipx_init( int socket_number, int show_address )
105 {
106 int i;
107
108 if (FindArg("-kali")) {
109 printf("Using Kali for network games\n");
110 driver = &ipx_kali;
111 //added on 12/20/98 by Jan Kratochvil for direct TCP/IP games
112 } else if (FindArg("-udp")) {
113 printf("Using native TCP/IP (UDP) for network games\n");
114 driver = &ipx_udp;
115 //end this section addition - JK
116 } else {
117 printf("Using real IPX for network games\n");
118 driver = &ipx_bsd;
119 }
120 if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
121 unsigned long n = strtol(Args[i + 1], NULL, 16);
122 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
123 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
124 printf("IPX: Using network %08x\n", (unsigned int)n);
125 }
126 if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
127 return -3;
128 }
129 driver->GetMyAddress();
130 memcpy(&ipx_network, ipx_MyAddress, 4);
131 Ipx_num_networks = 0;
132 memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
133 ipx_installed = 1;
134 atexit(ipx_close);
135 return 0;
136 }
137
ipx_close()138 void ipx_close()
139 {
140 if (ipx_installed)
141 driver->CloseSocket(&ipx_socket_data);
142 ipx_installed = 0;
143 }
144
ipx_get_packet_data(ubyte * data)145 int ipx_get_packet_data( ubyte * data )
146 {
147 struct ipx_recv_data rd;
148 char buf[MAX_IPX_DATA];
149 //killed 6-15-99 to get rid of compile warnings - OE
150 // uint best_id = 0;
151 // uint pkt_num;
152 //end kill - OE
153 int size;
154 int best_size = 0;
155 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
156 //--killed-- Like the original, only take latest packet, throw away rest
157 //do _NOT_ throw them away!
158 while (driver->PacketReady(&ipx_socket_data)) {
159 if ((size =
160 driver->ReceivePacket(&ipx_socket_data, buf,
161 sizeof(buf), &rd)) > 4) {
162 if (!memcmp(rd.src_network, ipx_MyAddress, 10))
163 continue; /* don't get own pkts */
164 //--killed-- pkt_num = *(uint *)buf;
165 //--killed-- if (pkt_num >= best_id) {
166 memcpy(data, buf + 4, size - 4);
167 return size-4;
168 //--killed-- best_id = pkt_num;
169 //--killed-- best_size = size - 4;
170 //--killed-- }
171 //end edit -MM
172 }
173 }
174 return best_size;
175 }
176
ipx_send_packet_data(ubyte * data,int datasize,ubyte * network,ubyte * address,ubyte * immediate_address)177 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
178 {
179 u_char buf[MAX_IPX_DATA];
180 IPXPacket_t ipx_header;
181
182 memcpy(ipx_header.Destination.Network, network, 4);
183 memcpy(ipx_header.Destination.Node, immediate_address, 6);
184 *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
185 ipx_header.PacketType = 4; /* Packet Exchange */
186 *(uint *)buf = ipx_packetnum++;
187 //ipx_packettotal+=datasize+4;
188 //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
189 //{
190 // ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
191 // printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
192 // ipx_packetnum/(int)f2i(Players[Player_num].time_level),
193 // ipx_packettotal/(int)f2i(Players[Player_num].time_level));
194 //}
195 memcpy(buf + 4, data, datasize);
196 driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
197 }
198
ipx_get_local_target(ubyte * server,ubyte * node,ubyte * local_target)199 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
200 {
201 // let's hope Linux knows how to route it
202 memcpy( local_target, node, 6 );
203 }
204
ipx_send_broadcast_packet_data(ubyte * data,int datasize)205 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
206 {
207 int i, j;
208 ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
209 ubyte local_address[6];
210
211 // Set to all networks besides mine
212 for (i=0; i<Ipx_num_networks; i++ ) {
213 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) ) {
214 ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
215 ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
216 } else {
217 ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
218 }
219 }
220
221 //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
222
223 // Send directly to all users not on my network or in the network list.
224 for (i=0; i<Ipx_num_users; i++ ) {
225 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) ) {
226 for (j=0; j<Ipx_num_networks; j++ ) {
227 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
228 goto SkipUser;
229 }
230 ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
231 SkipUser:
232 j = 0;
233 }
234 }
235 }
236
237 // Sends a non-localized packet... needs 4 byte server, 6 byte address
ipx_send_internetwork_packet_data(ubyte * data,int datasize,ubyte * server,ubyte * address)238 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
239 {
240 ubyte local_address[6];
241
242 if ( (*(uint *)server) != 0 ) {
243 ipx_get_local_target( server, address, local_address );
244 ipx_send_packet_data( data, datasize, server, address, local_address );
245 } else {
246 // Old method, no server info.
247 ipx_send_packet_data( data, datasize, server, address, address );
248 }
249 }
250
ipx_change_default_socket(ushort socket_number)251 int ipx_change_default_socket( ushort socket_number )
252 {
253 if ( !ipx_installed ) return -3;
254
255 driver->CloseSocket(&ipx_socket_data);
256 if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
257 return -3;
258 }
259 return 0;
260 }
261
ipx_read_user_file(char * filename)262 void ipx_read_user_file(char * filename)
263 {
264 FILE * fp;
265 user_address tmp;
266 char temp_line[132], *p1;
267 int n, ln=0, x;
268
269 if (!filename) return;
270
271 Ipx_num_users = 0;
272
273 fp = fopen( filename, "rt" );
274 if ( !fp ) return;
275
276 printf( "Broadcast Users:\n" );
277
278 while (fgets(temp_line, 132, fp)) {
279 ln++;
280 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
281 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
282 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
283 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
284 for (n = 0; n < 4; n++) {
285 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
286 break;
287 tmp.network[n] = x;
288 }
289 if (n != 4)
290 continue;
291 for (n = 0; n < 6; n++) {
292 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
293 break;
294 tmp.node[n] = x;
295 }
296 if (n != 6)
297 continue;
298 } else
299 continue;
300 #else
301 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] );
302 if ( n != 10 ) continue;
303 #endif
304 if ( Ipx_num_users < MAX_USERS ) {
305 ubyte * ipx_real_buffer = (ubyte *)&tmp;
306 ipx_get_local_target( tmp.network, tmp.node, tmp.address );
307 Ipx_users[Ipx_num_users++] = tmp;
308 printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
309 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] );
310 } else {
311 printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
312 fclose(fp);
313 return;
314 }
315 }
316 fclose(fp);
317 }
318
319
ipx_read_network_file(char * filename)320 void ipx_read_network_file(char * filename)
321 {
322 FILE * fp;
323 user_address tmp;
324 char temp_line[132], *p1;
325 int i, n, ln=0, x;
326
327 if (!filename) return;
328
329 fp = fopen( filename, "rt" );
330 if ( !fp ) return;
331
332 printf( "Using Networks:\n" );
333 for (i=0; i<Ipx_num_networks; i++ ) {
334 ubyte * n1 = (ubyte *)&Ipx_networks[i];
335 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
336 }
337
338 while (fgets(temp_line, 132, fp)) {
339 ln++;
340 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
341 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
342 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
343 if (strlen(temp_line) >= 8) {
344 for (n = 0; n < 4; n++) {
345 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
346 break;
347 tmp.network[n] = x;
348 }
349 if (n != 4)
350 continue;
351 } else
352 continue;
353 #else
354 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
355 if ( n != 4 ) continue;
356 #endif
357 if ( Ipx_num_networks < MAX_NETWORKS ) {
358 int j;
359 for (j=0; j<Ipx_num_networks; j++ )
360 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
361 break;
362 if ( j >= Ipx_num_networks ) {
363 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
364 printf(" %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
365 }
366 } else {
367 printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
368 fclose(fp);
369 return;
370 }
371 }
372 fclose(fp);
373 }
374 #endif //NETWORK
375