main.c revision 122760
1251512Semaste/* 2251512Semaste * Copyright (c) 1985, 1993 3251512Semaste * The Regents of the University of California. All rights reserved. 4251512Semaste * 5251512Semaste * Copyright (c) 1995 John Hay. All rights reserved. 6251512Semaste * 7251512Semaste * This file includes significant work done at Cornell University by 8251512Semaste * Bill Nesheim. That work included by permission. 9251512Semaste * 10251512Semaste * Redistribution and use in source and binary forms, with or without 11251512Semaste * modification, are permitted provided that the following conditions 12251512Semaste * are met: 13251512Semaste * 1. Redistributions of source code must retain the above copyright 14251512Semaste * notice, this list of conditions and the following disclaimer. 15251512Semaste * 2. Redistributions in binary form must reproduce the above copyright 16251512Semaste * notice, this list of conditions and the following disclaimer in the 17251512Semaste * documentation and/or other materials provided with the distribution. 18251512Semaste * 3. All advertising materials mentioning features or use of this software 19251512Semaste * must display the following acknowledgement: 20251512Semaste * This product includes software developed by the University of 21251512Semaste * California, Berkeley and its contributors. 22251512Semaste * 4. Neither the name of the University nor the names of its contributors 23251512Semaste * may be used to endorse or promote products derived from this software 24251512Semaste * without specific prior written permission. 25251512Semaste * 26251512Semaste * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27251512Semaste * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28251512Semaste * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29251512Semaste * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30251512Semaste * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31251512Semaste * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32251512Semaste * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33251512Semaste * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34251512Semaste * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35251512Semaste * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36251512Semaste * SUCH DAMAGE. 37251512Semaste * 38251512Semaste * $FreeBSD: head/usr.sbin/IPXrouted/main.c 122760 2003-11-15 17:10:56Z trhodes $ 39251512Semaste */ 40251512Semaste 41251512Semaste#ifndef lint 42251512Semastestatic const char copyright[] = 43251512Semaste"@(#) Copyright (c) 1985, 1993\n\ 44251512Semaste The Regents of the University of California. All rights reserved.\n"; 45251512Semaste#endif /* not lint */ 46251512Semaste 47251512Semaste#ifndef lint 48251512Semastestatic const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/5/93"; 49#endif /* not lint */ 50 51/* 52 * IPX Routing Information Protocol Daemon 53 */ 54#include "defs.h" 55#include <sys/time.h> 56 57#include <net/if.h> 58 59#include <errno.h> 60#include <nlist.h> 61#include <signal.h> 62#include <paths.h> 63#include <stdlib.h> 64#include <unistd.h> 65 66#define SAP_PKT 0 67#define RIP_PKT 1 68 69struct sockaddr_ipx addr; /* Daemon's Address */ 70int ripsock; /* RIP Socket to listen on */ 71int sapsock; /* SAP Socket to listen on */ 72int kmem; 73int install; /* if 1 call kernel */ 74int lookforinterfaces; /* if 1 probe kernel for new up interfaces */ 75int performnlist; /* if 1 check if /kernel has changed */ 76int externalinterfaces; /* # of remote and local interfaces */ 77int timeval; /* local idea of time */ 78int noteremoterequests; /* squawk on requests from non-local nets */ 79int r; /* Routing socket to install updates with */ 80struct sockaddr_ipx ipx_netmask; /* Used in installing routes */ 81 82char packet[MAXRXPACKETSIZE+1]; 83 84char **argv0; 85 86int supplier = -1; /* process should supply updates */ 87int dosap = 1; /* By default do SAP services. */ 88int dobcast = 1; /* A RIP/SAP broadcast is needed. */ 89time_t lastbcast; /* Time of last RIP/SAP broadcast */ 90 91struct rip *msg = (struct rip *) &packet[sizeof (struct ipx)]; 92struct sap_packet *sap_msg = 93 (struct sap_packet *) &packet[sizeof (struct ipx)]; 94void hup(), fkexit(), timer(); 95void process(int fd, int pkt_type); 96int getsocket(int type, int proto, struct sockaddr_ipx *sipx); 97void getinfo(); 98void catchtimer(); 99 100int 101main(argc, argv) 102 int argc; 103 char *argv[]; 104{ 105 int nfds; 106 fd_set fdvar; 107 time_t ttime; 108 struct itimerval tval; 109 110 argv0 = argv; 111 argv++, argc--; 112 while (argc > 0 && **argv == '-') { 113 if (strcmp(*argv, "-s") == 0) { 114 supplier = 1; 115 argv++, argc--; 116 continue; 117 } 118 if (strcmp(*argv, "-q") == 0) { 119 supplier = 0; 120 argv++, argc--; 121 continue; 122 } 123 if (strcmp(*argv, "-R") == 0) { 124 noteremoterequests++; 125 argv++, argc--; 126 continue; 127 } 128 if (strcmp(*argv, "-S") == 0) { 129 dosap = 0; 130 argv++, argc--; 131 continue; 132 } 133 if (strcmp(*argv, "-t") == 0) { 134 tracepackets++; 135 argv++, argc--; 136 ftrace = stderr; 137 tracing = 1; 138 continue; 139 } 140 if (strcmp(*argv, "-g") == 0) { 141 gateway = 1; 142 argv++, argc--; 143 continue; 144 } 145 if (strcmp(*argv, "-l") == 0) { 146 gateway = -1; 147 argv++, argc--; 148 continue; 149 } 150 if (strcmp(*argv, "-N") == 0) { 151 dognreply = 0; 152 argv++, argc--; 153 continue; 154 } 155 fprintf(stderr, 156 "usage: ipxrouted [ -s ] [ -q ] [ -t ] [ -g ] [ -l ] [ -N ]\n"); 157 exit(1); 158 } 159 160 161#ifndef DEBUG 162 if (!tracepackets) 163 daemon(0, 0); 164#endif 165 openlog("IPXrouted", LOG_PID, LOG_DAEMON); 166 167 addr.sipx_family = AF_IPX; 168 addr.sipx_len = sizeof(addr); 169 addr.sipx_port = htons(IPXPORT_RIP); 170 ipx_anynet.s_net[0] = ipx_anynet.s_net[1] = -1; 171 ipx_netmask.sipx_addr.x_net = ipx_anynet; 172 ipx_netmask.sipx_len = 6; 173 ipx_netmask.sipx_family = AF_IPX; 174 r = socket(AF_ROUTE, SOCK_RAW, 0); 175 /* later, get smart about lookingforinterfaces */ 176 if (r) 177 shutdown(r, 0); /* for now, don't want reponses */ 178 else { 179 fprintf(stderr, "IPXrouted: no routing socket\n"); 180 exit(1); 181 } 182 ripsock = getsocket(SOCK_DGRAM, 0, &addr); 183 if (ripsock < 0) 184 exit(1); 185 186 if (dosap) { 187 addr.sipx_port = htons(IPXPORT_SAP); 188 sapsock = getsocket(SOCK_DGRAM, 0, &addr); 189 if (sapsock < 0) 190 exit(1); 191 } else 192 sapsock = -1; 193 194 /* 195 * Any extra argument is considered 196 * a tracing log file. 197 */ 198 if (argc > 0) 199 traceon(*argv); 200 /* 201 * Collect an initial view of the world by 202 * snooping in the kernel. Then, send a request packet on all 203 * directly connected networks to find out what 204 * everyone else thinks. 205 */ 206 rtinit(); 207 sapinit(); 208 ifinit(); 209 if (supplier < 0) 210 supplier = 0; 211 /* request the state of the world */ 212 msg->rip_cmd = htons(RIPCMD_REQUEST); 213 msg->rip_nets[0].rip_dst = ipx_anynet; 214 msg->rip_nets[0].rip_metric = htons(HOPCNT_INFINITY); 215 msg->rip_nets[0].rip_ticks = htons(-1); 216 toall(sndmsg, NULL, 0); 217 218 if (dosap) { 219 sap_msg->sap_cmd = htons(SAP_REQ); 220 sap_msg->sap[0].ServType = htons(SAP_WILDCARD); 221 toall(sapsndmsg, NULL, 0); 222 } 223 224 signal(SIGALRM, catchtimer); 225 signal(SIGHUP, hup); 226 signal(SIGINT, hup); 227 signal(SIGEMT, fkexit); 228 signal(SIGINFO, getinfo); 229 230 tval.it_interval.tv_sec = TIMER_RATE; 231 tval.it_interval.tv_usec = 0; 232 tval.it_value.tv_sec = TIMER_RATE; 233 tval.it_value.tv_usec = 0; 234 setitimer(ITIMER_REAL, &tval, NULL); 235 236 nfds = 1 + max(sapsock, ripsock); 237 238 for (;;) { 239 if (dobcast) { 240 dobcast = 0; 241 lastbcast = time(NULL); 242 timer(); 243 } 244 245 FD_ZERO(&fdvar); 246 if (dosap) { 247 FD_SET(sapsock, &fdvar); 248 } 249 FD_SET(ripsock, &fdvar); 250 251 if(select(nfds, &fdvar, (fd_set *)NULL, (fd_set *)NULL, 252 (struct timeval *)NULL) < 0) { 253 if(errno == EINTR) 254 continue; 255 perror("during select"); 256 exit(1); 257 } 258 259 if(FD_ISSET(ripsock, &fdvar)) 260 process(ripsock, RIP_PKT); 261 262 if(dosap && FD_ISSET(sapsock, &fdvar)) 263 process(sapsock, SAP_PKT); 264 265 ttime = time(NULL); 266 if (ttime > (lastbcast + TIMER_RATE + (TIMER_RATE * 2 / 3))) { 267 dobcast = 1; 268 syslog(LOG_ERR, "Missed alarm"); 269 } 270 } 271} 272 273void 274process(fd, pkt_type) 275 int fd; 276 int pkt_type; 277{ 278 struct sockaddr from; 279 int fromlen = sizeof (from), cc, omask; 280 struct ipx *ipxdp = (struct ipx *)packet; 281 282 cc = recvfrom(fd, packet, sizeof (packet), 0, &from, &fromlen); 283 if (cc <= 0) { 284 if (cc < 0 && errno != EINTR) 285 syslog(LOG_ERR, "recvfrom: %m"); 286 return; 287 } 288 if (tracepackets > 1 && ftrace) { 289 fprintf(ftrace,"rcv %d bytes on %s ", 290 cc, ipxdp_ntoa(&ipxdp->ipx_dna)); 291 fprintf(ftrace," from %s\n", ipxdp_ntoa(&ipxdp->ipx_sna)); 292 } 293 294 if (noteremoterequests && 295 !ipx_neteqnn(ipxdp->ipx_sna.x_net, ipx_zeronet) && 296 !ipx_neteq(ipxdp->ipx_sna, ipxdp->ipx_dna)) 297 { 298 syslog(LOG_ERR, 299 "net of interface (%s) != net on ether (%s)!\n", 300 ipxdp_nettoa(ipxdp->ipx_dna.x_net), 301 ipxdp_nettoa(ipxdp->ipx_sna.x_net)); 302 } 303 304 /* We get the IPX header in front of the RIF packet*/ 305 cc -= sizeof (struct ipx); 306#define mask(s) (1<<((s)-1)) 307 omask = sigblock(mask(SIGALRM)); 308 switch(pkt_type) { 309 case SAP_PKT: sap_input(&from, cc); 310 break; 311 case RIP_PKT: rip_input(&from, cc); 312 break; 313 } 314 sigsetmask(omask); 315} 316 317int 318getsocket(type, proto, sipx) 319 int type, proto; 320 struct sockaddr_ipx *sipx; 321{ 322 int domain = sipx->sipx_family; 323 int retry, s, on = 1; 324 325 retry = 1; 326 while ((s = socket(domain, type, proto)) < 0 && retry) { 327 syslog(LOG_ERR, "socket: %m"); 328 sleep(5 * retry); 329 retry <<= 1; 330 } 331 if (retry == 0) 332 return (-1); 333 while (bind(s, (struct sockaddr *)sipx, sizeof (*sipx)) < 0 && retry) { 334 syslog(LOG_ERR, "bind: %m"); 335 sleep(5 * retry); 336 retry <<= 1; 337 } 338 if (retry == 0) 339 return (-1); 340 if (domain==AF_IPX) { 341 struct ipx ipxdp; 342 if (setsockopt(s, 0, SO_HEADERS_ON_INPUT, &on, sizeof(on))) { 343 syslog(LOG_ERR, "setsockopt SEE HEADERS: %m"); 344 exit(1); 345 } 346 if (ntohs(sipx->sipx_addr.x_port) == IPXPORT_RIP) 347 ipxdp.ipx_pt = IPXPROTO_RI; 348 else if (ntohs(sipx->sipx_addr.x_port) == IPXPORT_SAP) 349#ifdef IPXPROTO_SAP 350 ipxdp.ipx_pt = IPXPROTO_SAP; 351#else 352 ipxdp.ipx_pt = IPXPROTO_PXP; 353#endif 354 else { 355 syslog(LOG_ERR, "port should be either RIP or SAP"); 356 exit(1); 357 } 358 if (setsockopt(s, 0, SO_DEFAULT_HEADERS, &ipxdp, sizeof(ipxdp))) { 359 syslog(LOG_ERR, "setsockopt SET HEADER: %m"); 360 exit(1); 361 } 362 } 363 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) { 364 syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m"); 365 exit(1); 366 } 367 return (s); 368} 369 370/* 371 * Fork and exit on EMT-- for profiling. 372 */ 373void 374fkexit() 375{ 376 if (fork() == 0) 377 exit(0); 378} 379 380void 381catchtimer() 382{ 383 dobcast = 1; 384} 385 386void 387getinfo() 388{ 389 FILE *fh; 390 391 fh = fopen("/var/log/ipxrouted.dmp", "a"); 392 if(fh == NULL) 393 return; 394 395 dumpriptable(fh); 396 dumpsaptable(fh, sap_head); 397 398 fclose(fh); 399} 400 401