Commit | Line | Data |
---|---|---|
ab6da654 DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
dd020e70 | 7 | #ifndef lint |
2de3e885 KM |
8 | char copyright[] = |
9 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
13 | #ifndef lint | |
2d474861 | 14 | static char sccsid[] = "@(#)htable.c 5.5 (Berkeley) %G%"; |
ab6da654 | 15 | #endif not lint |
dd020e70 SL |
16 | |
17 | /* | |
18 | * htable - convert NIC host table into a UNIX format. | |
19 | * NIC format is described in RFC 810, 1 March 1982. | |
20 | */ | |
21 | #include <stdio.h> | |
22 | #include <ctype.h> | |
5494cf94 | 23 | #include <errno.h> |
7df00d98 | 24 | #include <netdb.h> |
7df00d98 | 25 | |
5494cf94 | 26 | #include "htable.h" /* includes <sys/types.h> */ |
dd020e70 | 27 | |
f7a7a9a9 | 28 | #include <sys/socket.h> |
5494cf94 SL |
29 | #include <netinet/in.h> |
30 | ||
1750308c | 31 | #define DATELINES 3 /* these lines usually contain the date */ |
99d3ae94 | 32 | #define MAXNETS 30 /* array size for local, connected nets */ |
1750308c | 33 | |
5494cf94 SL |
34 | FILE *hf; /* hosts file */ |
35 | FILE *gf; /* gateways file */ | |
36 | FILE *nf; /* networks file */ | |
99d3ae94 MK |
37 | struct gateway *savegateway(), *gatewayto(); |
38 | ||
39 | int connected_nets[MAXNETS]; | |
40 | int nconnected; | |
41 | int local_nets[MAXNETS]; | |
42 | int nlocal; | |
43 | char *myname; | |
dd020e70 SL |
44 | |
45 | main(argc, argv) | |
46 | int argc; | |
47 | char *argv[]; | |
48 | { | |
99d3ae94 MK |
49 | int errs; |
50 | ||
dd020e70 | 51 | infile = "(stdin)"; |
99d3ae94 MK |
52 | myname = argv[0]; |
53 | argc--; | |
54 | argv++; | |
55 | while (argc--) { | |
56 | if (*argv[0] == '-') { | |
57 | switch (argv[0][1]) { | |
58 | case 'c': | |
59 | nconnected = addlocal(argv[1], connected_nets); | |
60 | argv++; | |
61 | argc--; | |
62 | break; | |
63 | case 'l': | |
64 | nlocal = addlocal(argv[1], local_nets); | |
65 | argv++; | |
66 | argc--; | |
67 | break; | |
68 | default: | |
69 | usage(); | |
70 | /*NOTREACHED*/ | |
71 | } | |
72 | } else { | |
73 | infile = argv[0]; | |
74 | if (freopen(infile, "r", stdin) == NULL) { | |
75 | perror(infile); | |
76 | exit(1); | |
77 | } | |
dd020e70 | 78 | } |
99d3ae94 | 79 | argv++; |
dd020e70 SL |
80 | } |
81 | hf = fopen("hosts", "w"); | |
82 | if (hf == NULL) { | |
83 | perror("hosts"); | |
84 | exit(1); | |
85 | } | |
5494cf94 SL |
86 | copylocal(hf, "localhosts"); |
87 | gf = fopen("gateways", "w"); | |
88 | if (gf == NULL) { | |
dd020e70 SL |
89 | perror("gateways"); |
90 | exit(1); | |
91 | } | |
99d3ae94 | 92 | copygateways(gf, "localgateways"); |
5494cf94 SL |
93 | nf = fopen("networks", "w"); |
94 | if (nf == NULL) { | |
95 | perror("networks"); | |
96 | exit(1); | |
97 | } | |
98 | copylocal(nf, "localnetworks"); | |
1750308c | 99 | copycomments(stdin, hf, DATELINES); |
99d3ae94 MK |
100 | errs = yyparse(); |
101 | dogateways(); | |
102 | exit(errs); | |
103 | } | |
104 | ||
105 | usage() | |
106 | { | |
107 | fprintf(stderr, | |
108 | "usage: %s [ -c connected-nets ] [-l local-nets ] [ input-file ]\n", | |
109 | myname); | |
110 | exit(1); | |
111 | } | |
112 | ||
113 | /* | |
114 | * Turn a comma-separated list of network names or numbers in dot notation | |
115 | * (e.g. "arpanet, 128.32") into an array of net numbers. | |
116 | */ | |
117 | addlocal(arg, nets) | |
118 | char *arg; | |
119 | int *nets; | |
120 | { | |
121 | register char *p, c; | |
122 | register int nfound = 0; | |
123 | ||
124 | do { | |
125 | p = arg; | |
126 | while (*p && *p != ',' && !isspace(*p)) | |
127 | p++; | |
128 | c = *p; | |
129 | *p = 0; | |
130 | while (*arg && isspace(*arg)) | |
131 | arg++; | |
132 | if (*arg == 0) | |
133 | continue; | |
134 | if (nfound == MAXNETS) { | |
135 | fprintf(stderr, "%s: Too many networks in list\n", | |
136 | myname); | |
137 | return (nfound); | |
138 | } | |
139 | if (getnetaddr(arg, &nets[nfound])) | |
140 | nfound++; | |
141 | else { | |
142 | fprintf(stderr, "%s: %s: unknown network\n", | |
143 | myname, arg); | |
144 | exit(1); | |
145 | } | |
573c06ae | 146 | arg = p + 1; |
99d3ae94 MK |
147 | } while (c); |
148 | return (nfound); | |
dd020e70 SL |
149 | } |
150 | ||
151 | struct name * | |
152 | newname(str) | |
153 | char *str; | |
154 | { | |
155 | char *p; | |
156 | struct name *nm; | |
157 | ||
158 | p = malloc(strlen(str) + 1); | |
159 | strcpy(p, str); | |
5494cf94 | 160 | nm = (struct name *)malloc(sizeof (struct name)); |
dd020e70 SL |
161 | nm->name_val = p; |
162 | nm->name_link = NONAME; | |
163 | return (nm); | |
164 | } | |
165 | ||
166 | char * | |
167 | lower(str) | |
168 | char *str; | |
169 | { | |
170 | register char *cp = str; | |
171 | ||
172 | while (*cp) { | |
173 | if (isupper(*cp)) | |
174 | *cp = tolower(*cp); | |
1bcba0d9 MK |
175 | if (*cp == '.') |
176 | break; | |
dd020e70 SL |
177 | cp++; |
178 | } | |
179 | return (str); | |
180 | } | |
181 | ||
182 | do_entry(keyword, addrlist, namelist, cputype, opsys, protos) | |
183 | int keyword; | |
184 | struct addr *addrlist; | |
185 | struct name *namelist, *cputype, *opsys, *protos; | |
186 | { | |
187 | register struct addr *al, *al2; | |
5494cf94 | 188 | register struct name *nl; |
99d3ae94 MK |
189 | struct addr *connect_addr; |
190 | char *cp; | |
dd020e70 SL |
191 | |
192 | switch (keyword) { | |
193 | ||
194 | case KW_NET: | |
5494cf94 SL |
195 | nl = namelist; |
196 | if (nl == NONAME) { | |
197 | fprintf(stderr, "htable: net"); | |
6e2735e4 | 198 | putnet(stderr, inet_netof(addrlist->addr_val)); |
5494cf94 SL |
199 | fprintf(stderr, " missing names.\n"); |
200 | break; | |
201 | } | |
202 | fprintf(nf, "%-16.16s", lower(nl->name_val)); | |
203 | al2 = addrlist; | |
204 | while (al = al2) { | |
205 | char *cp; | |
206 | ||
6e2735e4 | 207 | putnet(nf, inet_netof(al->addr_val)); |
5494cf94 SL |
208 | cp = "\t%s"; |
209 | while (nl = nl->name_link) { | |
210 | fprintf(nf, cp, lower(nl->name_val)); | |
211 | cp = " %s"; | |
212 | } | |
213 | putc('\n', nf); | |
214 | al2 = al->addr_link; | |
215 | free((char *)al); | |
216 | } | |
99d3ae94 | 217 | break; |
dd020e70 SL |
218 | |
219 | case KW_GATEWAY: | |
99d3ae94 | 220 | /* locate locally connected address, if one */ |
7df00d98 | 221 | for (al = addrlist; al; al = al->addr_link) |
99d3ae94 | 222 | if (connectedto(inet_netof(al->addr_val))) |
7df00d98 | 223 | break; |
99d3ae94 MK |
224 | if (al == NULL) { |
225 | /* | |
226 | * Not connected to known networks. Save for later. | |
227 | */ | |
228 | struct gateway *gw, *firstgw = (struct gateway *) NULL; | |
229 | ||
230 | for (al = addrlist; al; al = al->addr_link) { | |
231 | register int net; | |
232 | ||
233 | net = inet_netof(al->addr_val); | |
234 | gw = savegateway(namelist, net, | |
235 | al->addr_val, 0); | |
236 | if (firstgw == (struct gateway *) NULL) | |
237 | firstgw = gw; | |
238 | gw->g_firstent = firstgw; | |
239 | } | |
240 | freeaddrs(addrlist); | |
241 | goto dontfree; | |
242 | } | |
243 | /* | |
244 | * Connected to a known network. | |
245 | * Mark this as the gateway to all other networks | |
246 | * that are on the addrlist (unless we already have | |
247 | * gateways to them). | |
248 | */ | |
249 | connect_addr = al; | |
250 | for (al = addrlist; al; al = al->addr_link) { | |
7df00d98 | 251 | register int net; |
5494cf94 SL |
252 | |
253 | /* suppress duplicates -- not optimal */ | |
7df00d98 | 254 | net = inet_netof(al->addr_val); |
49cdcf9f | 255 | if (connectedto(net) || gatewayto(net)) |
99d3ae94 MK |
256 | continue; |
257 | printgateway(net, namelist->name_val, 1); | |
258 | (void) savegateway(namelist, net, al->addr_val, 1); | |
7df00d98 | 259 | } |
99d3ae94 MK |
260 | /* |
261 | * Put the gateway in the hosts file. | |
262 | */ | |
263 | putaddr(hf, connect_addr->addr_val); | |
264 | cp = "%s"; | |
265 | for (nl = namelist; nl; nl = nl->name_link) { | |
266 | fprintf(hf, cp, lower(nl->name_val)); | |
267 | cp = " %s"; | |
5494cf94 | 268 | } |
99d3ae94 MK |
269 | fprintf(hf, "\t# gateway\n"); |
270 | freeaddrs(addrlist); | |
271 | goto dontfree; | |
dd020e70 SL |
272 | |
273 | case KW_HOST: | |
5494cf94 SL |
274 | al2 = addrlist; |
275 | while (al = al2) { | |
99d3ae94 | 276 | if (!local(inet_netof(al->addr_val))) { |
5494cf94 SL |
277 | char *cp; |
278 | ||
279 | putaddr(hf, al->addr_val); | |
280 | cp = "%s"; | |
281 | for (nl = namelist; nl; nl = nl->name_link) { | |
282 | fprintf(hf, cp, lower(nl->name_val)); | |
283 | cp = " %s"; | |
284 | } | |
dd020e70 SL |
285 | putc('\n', hf); |
286 | } | |
287 | al2 = al->addr_link; | |
5494cf94 | 288 | free((char *)al); |
dd020e70 | 289 | } |
99d3ae94 | 290 | break; |
dd020e70 SL |
291 | |
292 | default: | |
293 | fprintf(stderr, "Unknown keyword: %d.\n", keyword); | |
294 | } | |
5494cf94 | 295 | freenames(namelist); |
99d3ae94 | 296 | dontfree: |
5494cf94 | 297 | freenames(protos); |
dd020e70 SL |
298 | } |
299 | ||
99d3ae94 MK |
300 | printgateway(net, name, metric) |
301 | int net; | |
302 | char *name; | |
303 | int metric; | |
304 | { | |
305 | struct netent *np; | |
306 | ||
307 | fprintf(gf, "net "); | |
308 | np = getnetbyaddr(net, AF_INET); | |
309 | if (np) | |
310 | fprintf(gf, "%s", np->n_name); | |
311 | else | |
312 | putnet(gf, net); | |
313 | fprintf(gf, " gateway %s metric %d passive\n", | |
314 | lower(name), metric); | |
315 | } | |
316 | ||
5494cf94 SL |
317 | copylocal(f, filename) |
318 | FILE *f; | |
319 | char *filename; | |
dd020e70 SL |
320 | { |
321 | register FILE *lhf; | |
322 | register cc; | |
323 | char buf[BUFSIZ]; | |
5494cf94 | 324 | extern int errno; |
dd020e70 | 325 | |
5494cf94 | 326 | lhf = fopen(filename, "r"); |
dd020e70 | 327 | if (lhf == NULL) { |
5494cf94 SL |
328 | if (errno != ENOENT) { |
329 | perror(filename); | |
330 | exit(1); | |
331 | } | |
332 | fprintf(stderr, "Warning, no %s file.\n", filename); | |
dd020e70 SL |
333 | return; |
334 | } | |
335 | while (cc = fread(buf, 1, sizeof(buf), lhf)) | |
5494cf94 | 336 | fwrite(buf, 1, cc, f); |
dd020e70 SL |
337 | fclose(lhf); |
338 | } | |
5494cf94 | 339 | |
99d3ae94 MK |
340 | copygateways(f, filename) |
341 | FILE *f; | |
342 | char *filename; | |
343 | { | |
344 | register FILE *lhf; | |
99d3ae94 MK |
345 | struct name *nl; |
346 | char type[80]; | |
347 | char dname[80]; | |
348 | char gname[80]; | |
349 | char junk[80]; | |
581d366a | 350 | char buf[500]; |
99d3ae94 MK |
351 | u_long addr; |
352 | int net, metric; | |
353 | extern int errno; | |
354 | ||
355 | lhf = fopen(filename, "r"); | |
356 | if (lhf == NULL) { | |
357 | if (errno != ENOENT) { | |
358 | perror(filename); | |
359 | exit(1); | |
360 | } | |
361 | fprintf(stderr, "Warning, no %s file.\n", filename); | |
362 | return; | |
363 | } | |
364 | /* format: {net | host} XX gateway XX metric DD [passive]\n */ | |
6e2735e4 MK |
365 | for (;;) { |
366 | junk[0] = 0; | |
581d366a | 367 | if (fgets(buf, sizeof(buf), lhf) == (char *)NULL) |
6e2735e4 | 368 | break; |
581d366a MK |
369 | fputs(buf, gf); |
370 | if (buf[0] == '#' || | |
371 | sscanf(buf, "%s %s gateway %s metric %d %s", | |
372 | type, dname, gname, &metric, junk) < 5) | |
373 | continue; | |
99d3ae94 | 374 | if (strcmp(type, "net")) |
581d366a | 375 | continue; |
99d3ae94 | 376 | if (!getnetaddr(dname, &net)) |
581d366a | 377 | continue; |
99d3ae94 | 378 | if (!gethostaddr(gname, &addr)) |
581d366a | 379 | continue; |
99d3ae94 MK |
380 | nl = newname(gname); |
381 | (void) savegateway(nl, net, addr, metric); | |
99d3ae94 MK |
382 | } |
383 | fclose(lhf); | |
384 | } | |
385 | ||
386 | getnetaddr(name, addr) | |
387 | char *name; | |
388 | int *addr; | |
389 | { | |
390 | struct netent *np = getnetbyname(name); | |
391 | int n; | |
392 | ||
393 | if (np == 0) { | |
394 | *addr = inet_network(name); | |
395 | return (*addr != -1); | |
396 | } else { | |
397 | if (np->n_addrtype != AF_INET) | |
398 | return (0); | |
399 | *addr = np->n_net; | |
400 | return (1); | |
401 | } | |
402 | } | |
403 | ||
404 | gethostaddr(name, addr) | |
405 | char *name; | |
406 | u_long *addr; | |
407 | { | |
408 | struct hostent *hp; | |
409 | ||
410 | hp = gethostbyname(name); | |
411 | if (hp) { | |
412 | *addr = *(u_long *)(hp->h_addr); | |
413 | return (1); | |
414 | } | |
415 | *addr = inet_addr(name); | |
416 | return (*addr != -1); | |
417 | } | |
418 | ||
1750308c MD |
419 | copycomments(in, out, ccount) |
420 | FILE *in, *out; | |
421 | int ccount; | |
422 | { | |
423 | char buf[BUFSIZ]; | |
424 | int length; | |
425 | int count; | |
426 | char *fgets(); | |
427 | ||
428 | for (count=0; count < ccount; count++) { | |
429 | if ((fgets(buf, sizeof(buf), in) == NULL) || (buf[0] != ';')) | |
430 | return; | |
431 | buf[0] = '#'; | |
432 | fputs(buf, out); | |
433 | } | |
434 | return; | |
435 | } | |
5494cf94 SL |
436 | #define UC(b) (((int)(b))&0xff) |
437 | ||
3dbccebd MK |
438 | /* |
439 | * Print network number in internet-standard dot notation; | |
440 | * v is in host byte order. | |
441 | */ | |
5494cf94 SL |
442 | putnet(f, v) |
443 | FILE *f; | |
6e2735e4 | 444 | register int v; |
5494cf94 | 445 | { |
3dbccebd MK |
446 | if (v < 128) |
447 | fprintf(f, "%d", v); | |
448 | else if (v < 65536) | |
6e2735e4 | 449 | fprintf(f, "%d.%d", UC(v >> 8), UC(v)); |
5494cf94 | 450 | else |
6e2735e4 | 451 | fprintf(f, "%d.%d.%d", UC(v >> 16), UC(v >> 8), UC(v)); |
5494cf94 SL |
452 | } |
453 | ||
454 | putaddr(f, v) | |
455 | FILE *f; | |
456 | u_long v; | |
457 | { | |
458 | register char *a = (char *)&v; | |
459 | char buf[32]; | |
460 | ||
461 | sprintf(buf,"%d.%d.%d.%d", UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3])); | |
462 | fprintf(f, "%-16.16s", buf); | |
463 | } | |
464 | ||
465 | freenames(list) | |
466 | struct name *list; | |
467 | { | |
468 | register struct name *nl, *nl2; | |
469 | ||
470 | nl2 = list; | |
471 | while (nl = nl2) { | |
472 | nl2 = nl->name_link; | |
473 | free(nl->name_val); | |
474 | free((char *)nl); | |
475 | } | |
476 | } | |
99d3ae94 MK |
477 | |
478 | freeaddrs(list) | |
479 | struct addr *list; | |
480 | { | |
481 | register struct addr *al, *al2; | |
482 | ||
483 | al2 = list; | |
484 | while (al = al2) | |
485 | al2 = al->addr_link, free((char *)al); | |
486 | } | |
5494cf94 SL |
487 | |
488 | struct gateway *gateways = 0; | |
99d3ae94 | 489 | struct gateway *lastgateway = 0; |
5494cf94 | 490 | |
99d3ae94 MK |
491 | struct gateway * |
492 | gatewayto(net) | |
5494cf94 SL |
493 | register int net; |
494 | { | |
495 | register struct gateway *gp; | |
496 | ||
497 | for (gp = gateways; gp; gp = gp->g_link) | |
99d3ae94 MK |
498 | if ((gp->g_net == net) && (gp->g_metric > 0)) |
499 | return (gp); | |
500 | return ((struct gateway *) NULL); | |
5494cf94 SL |
501 | } |
502 | ||
99d3ae94 MK |
503 | struct gateway * |
504 | savegateway(namelist, net, addr, metric) | |
505 | struct name *namelist; | |
506 | u_long addr; | |
507 | int net, metric; | |
5494cf94 SL |
508 | { |
509 | register struct gateway *gp; | |
510 | ||
511 | gp = (struct gateway *)malloc(sizeof (struct gateway)); | |
512 | if (gp == 0) { | |
513 | fprintf(stderr, "htable: out of memory\n"); | |
514 | exit(1); | |
515 | } | |
99d3ae94 MK |
516 | gp->g_link = (struct gateway *) NULL; |
517 | if (lastgateway) | |
518 | lastgateway->g_link = gp; | |
519 | else | |
520 | gateways = gp; | |
521 | lastgateway = gp; | |
522 | gp->g_name = namelist; | |
5494cf94 | 523 | gp->g_net = net; |
99d3ae94 MK |
524 | gp->g_addr = addr; |
525 | gp->g_metric = metric; | |
526 | if (metric == 1) | |
527 | gp->g_dst = gp; | |
2d474861 | 528 | return (gp); |
99d3ae94 MK |
529 | } |
530 | ||
531 | connectedto(net) | |
532 | u_long net; | |
533 | { | |
534 | register i; | |
535 | ||
536 | for (i = 0; i < nconnected; i++) | |
537 | if (connected_nets[i] == net) | |
538 | return(1); | |
539 | return(0); | |
540 | } | |
541 | ||
542 | local(net) | |
543 | u_long net; | |
544 | { | |
545 | register i; | |
546 | ||
547 | for (i = 0; i < nlocal; i++) | |
548 | if (local_nets[i] == net) | |
549 | return(1); | |
550 | return(0); | |
551 | } | |
552 | ||
553 | #define MAXHOPS 10 | |
554 | ||
555 | /* | |
556 | * Go through list of gateways, finding connections for gateways | |
557 | * that are not yet connected. | |
558 | */ | |
559 | dogateways() | |
560 | { | |
561 | register struct gateway *gp, *gw, *ggp; | |
562 | register int hops, changed = 1; | |
563 | struct name *nl; | |
564 | char *cp; | |
565 | ||
566 | for (hops = 0; hops < MAXHOPS && changed; hops++, changed = 0) { | |
567 | for (gp = gateways; gp; gp = gp->g_link) | |
568 | if ((gp->g_metric == 0) && (gw = gatewayto(gp->g_net))) { | |
569 | /* | |
570 | * Found a new connection. | |
571 | * For each other network that this gateway is on, | |
572 | * add a new gateway to that network. | |
573 | */ | |
574 | changed = 1; | |
575 | gp->g_dst = gw->g_dst; | |
576 | gp->g_metric = gw->g_metric + 1; | |
577 | for (ggp = gp->g_firstent; ggp->g_name == gp->g_name; | |
578 | ggp = ggp->g_link) { | |
579 | if (ggp == gp) | |
580 | continue; | |
581 | if (gatewayto(ggp->g_net)) | |
582 | continue; | |
583 | ggp->g_dst = gp->g_dst; | |
584 | ggp->g_metric = gp->g_metric; | |
585 | printgateway(ggp->g_net, | |
586 | gw->g_dst->g_name->name_val, gp->g_metric); | |
587 | } | |
588 | /* | |
589 | * Put the gateway in the hosts file, | |
590 | * using the address for the connected net. | |
591 | */ | |
592 | putaddr(hf, gp->g_addr); | |
593 | cp = "%s"; | |
594 | for (nl = gp->g_name; nl; nl = nl->name_link) { | |
595 | fprintf(hf, cp, lower(nl->name_val)); | |
596 | cp = " %s"; | |
597 | } | |
598 | fprintf(hf, "\t# gateway\n"); | |
599 | } | |
600 | } | |
5494cf94 | 601 | } |