1 /* $Id: linuxnet.c,v 1.12 2003-10-12 09:17:47 btb Exp $ */
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12 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
17 * Linux lower-level network code.
18 * implements functions declared in include/ipx.h
31 #include <sys/types.h>
33 #include <netinet/in.h> /* for htons & co. */
46 #include "ipx_mcast4.h"
48 #include "../../main/player.h" /* for Players */
49 #include "../../main/multi.h" /* for NetPlayers */
50 //added 05/17/99 Matt Mueller - needed to redefine FD_* so that no asm is used
51 //#include "checker.h"
55 #define MAX_IPX_DATA 576
58 ipx_socket_t ipx_socket_data;
59 ubyte ipx_installed=0;
60 ushort ipx_socket = 0;
62 ubyte ipx_MyAddress[10];
63 int ipx_packetnum = 0; /* Sequence number */
64 //int ipx_packettotal=0,ipx_lastspeed=0;
66 /* User defined routing stuff */
67 typedef struct user_address {
73 int Ipx_num_users = 0;
74 user_address Ipx_users[MAX_USERS];
76 #define MAX_NETWORKS 64
77 int Ipx_num_networks = 0;
78 uint Ipx_networks[MAX_NETWORKS];
80 int ipx_general_PacketReady(ipx_socket_t *s) {
86 tv.tv_sec = tv.tv_usec = 0;
87 if (select(s->fd + 1, &set, NULL, NULL, &tv) > 0)
93 struct ipx_driver *driver = &ipx_udp;
95 ubyte * ipx_get_my_server_address()
97 return (ubyte *)&ipx_network;
100 ubyte * ipx_get_my_local_address()
102 return (ubyte *)(ipx_MyAddress + 4);
105 void arch_ipx_set_driver(int ipx_driver)
109 case IPX_DRIVER_IPX: driver = &ipx_bsd; break;
111 case IPX_DRIVER_KALI: driver = &ipx_kali; break;
112 case IPX_DRIVER_UDP: driver = &ipx_udp; break;
113 case IPX_DRIVER_MCAST4: driver = &ipx_mcast4; break;
118 int ipx_init(int socket_number)
122 if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
123 unsigned long n = strtol(Args[i + 1], NULL, 16);
124 ipx_MyAddress[0] = n >> 24; ipx_MyAddress[1] = (n >> 16) & 255;
125 ipx_MyAddress[2] = (n >> 8) & 255; ipx_MyAddress[3] = n & 255;
126 printf("IPX: Using network %08x\n", (unsigned int)n);
128 if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
129 return IPX_NOT_INSTALLED;
131 driver->GetMyAddress();
132 memcpy(&ipx_network, ipx_MyAddress, 4);
133 Ipx_num_networks = 0;
134 memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
143 driver->CloseSocket(&ipx_socket_data);
147 int ipx_get_packet_data( ubyte * data )
149 struct ipx_recv_data rd;
150 char buf[MAX_IPX_DATA];
151 //killed 6-15-99 to get rid of compile warnings - OE
157 //edited 04/12/99 Matt Mueller - duh, we don't want to throw all that data away!
158 //--killed-- Like the original, only take latest packet, throw away rest
159 //do _NOT_ throw them away!
160 while (driver->PacketReady(&ipx_socket_data)) {
162 driver->ReceivePacket(&ipx_socket_data, buf,
163 sizeof(buf), &rd)) > 4) {
164 if (!memcmp(rd.src_network, ipx_MyAddress, 10))
165 continue; /* don't get own pkts */
166 //--killed-- pkt_num = INTEL_INT(*(uint *)buf);
167 //--killed-- if (pkt_num >= best_id) {
168 memcpy(data, buf + 4, size - 4);
170 //--killed-- best_id = pkt_num;
171 //--killed-- best_size = size - 4;
179 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
181 u_char buf[MAX_IPX_DATA];
182 IPXPacket_t ipx_header;
184 Assert(datasize <= MAX_IPX_DATA+4);
186 memcpy(ipx_header.Destination.Network, network, 4);
187 memcpy(ipx_header.Destination.Node, immediate_address, 6);
188 *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
189 ipx_header.PacketType = 4; /* Packet Exchange */
190 *(uint *)buf = INTEL_INT(ipx_packetnum);
192 //ipx_packettotal+=datasize+4;
193 //if (f2i(Players[Player_num].time_level) && (f2i(Players[Player_num].time_level)%10!=ipx_lastspeed))
195 // ipx_lastspeed=f2i(Players[Player_num].time_level)%10;
196 // printf("tot=%i,t2=%i,time=%i,avg=%i,a2=%i\n",ipx_packetnum,ipx_packettotal,(int)f2i(Players[Player_num].time_level),
197 // ipx_packetnum/(int)f2i(Players[Player_num].time_level),
198 // ipx_packettotal/(int)f2i(Players[Player_num].time_level));
200 memcpy(buf + 4, data, datasize);
201 driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
204 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
206 // let's hope Linux knows how to route it
207 memcpy( local_target, node, 6 );
210 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
213 ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
214 ubyte local_address[6];
216 // Set to all networks besides mine
217 for (i=0; i<Ipx_num_networks; i++ ) {
218 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) ) {
219 ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
220 ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
222 ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
226 //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
228 // Send directly to all users not on my network or in the network list.
229 for (i=0; i<Ipx_num_users; i++ ) {
230 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) ) {
231 for (j=0; j<Ipx_num_networks; j++ ) {
232 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
235 ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
242 // Sends a non-localized packet... needs 4 byte server, 6 byte address
243 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
245 ubyte local_address[6];
247 #ifdef WORDS_NEED_ALIGNMENT
249 if (memcmp(server, &zero, 4)) {
250 #else // WORDS_NEED_ALIGNMENT
251 if ((*(uint *)server) != 0) {
252 #endif // WORDS_NEED_ALIGNMENT
253 ipx_get_local_target( server, address, local_address );
254 ipx_send_packet_data( data, datasize, server, address, local_address );
256 // Old method, no server info.
257 ipx_send_packet_data( data, datasize, server, address, address );
261 int ipx_change_default_socket( ushort socket_number )
263 if ( !ipx_installed ) return -3;
265 driver->CloseSocket(&ipx_socket_data);
266 if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
272 void ipx_read_user_file(char * filename)
276 char temp_line[132], *p1;
279 if (!filename) return;
283 fp = fopen( filename, "rt" );
286 printf( "Broadcast Users:\n" );
288 while (fgets(temp_line, 132, fp)) {
290 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
291 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
292 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
293 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
294 for (n = 0; n < 4; n++) {
295 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
301 for (n = 0; n < 6; n++) {
302 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
311 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] );
312 if ( n != 10 ) continue;
314 if ( Ipx_num_users < MAX_USERS ) {
315 ubyte * ipx_real_buffer = (ubyte *)&tmp;
316 ipx_get_local_target( tmp.network, tmp.node, tmp.address );
317 Ipx_users[Ipx_num_users++] = tmp;
318 printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
319 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] );
321 printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
330 void ipx_read_network_file(char * filename)
334 char temp_line[132], *p1;
337 if (!filename) return;
339 fp = fopen( filename, "rt" );
342 printf( "Using Networks:\n" );
343 for (i=0; i<Ipx_num_networks; i++ ) {
344 ubyte * n1 = (ubyte *)&Ipx_networks[i];
345 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
348 while (fgets(temp_line, 132, fp)) {
350 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
351 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
352 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
353 if (strlen(temp_line) >= 8) {
354 for (n = 0; n < 4; n++) {
355 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
364 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
365 if ( n != 4 ) continue;
367 if ( Ipx_num_networks < MAX_NETWORKS ) {
369 for (j=0; j<Ipx_num_networks; j++ )
370 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
372 if ( j >= Ipx_num_networks ) {
373 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
374 printf(" %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
377 printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
385 // Initalizes the protocol-specific member of the netgame packet.
386 void ipx_init_netgame_aux_data(ubyte buf[])
388 if(driver->InitNetgameAuxData)
389 driver->InitNetgameAuxData(&ipx_socket_data, buf);
392 // Handles the protocol-specific member of the netgame packet.
393 int ipx_handle_netgame_aux_data(const ubyte buf[])
395 if(driver->HandleNetgameAuxData)
396 return driver->HandleNetgameAuxData(&ipx_socket_data, buf);
400 // Notifies the protocol that we're done with a particular game
401 void ipx_handle_leave_game()
403 if(driver->HandleLeaveGame)
404 driver->HandleLeaveGame(&ipx_socket_data);
407 // Send a packet to every member of the game.
408 int ipx_send_game_packet(ubyte *data, int datasize)
410 if(driver->SendGamePacket) {
411 u_char buf[MAX_IPX_DATA];
413 *(uint *)buf = ipx_packetnum++;
414 memcpy(buf + 4, data, datasize);
415 *(uint *)data = ipx_packetnum++;
416 return driver->SendGamePacket(&ipx_socket_data, buf, datasize + 4);
418 // Loop through all the players unicasting the packet.
421 //printf("Sending game packet: N_players = %i\n", N_players);
423 for(i=0; i<N_players; i++) {
424 if(Players[i].connected && (i != Player_num))
425 ipx_send_packet_data(data, datasize, NetPlayers.players[i].network.ipx.server, NetPlayers.players[i].network.ipx.node,Players[i].net_address);