1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char copyright[] =
10 "@(#) Copyright (c) 1983, 1993\n\
11 The Regents of the University of California. All rights reserved.\n";
12 #endif /* not lint */
13
14 #ifndef lint
15 static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 02/16/94";
16 #endif /* not lint */
17
18 #include <sys/param.h>
19 #include <sys/socket.h>
20 #include <sys/ioctl.h>
21
22 #include <net/if.h>
23 #include <netinet/in.h>
24 #include <arpa/inet.h>
25
26 #define NSIP
27 #include <netns/ns.h>
28 #include <netns/ns_if.h>
29 #include <netdb.h>
30
31 #define EON
32 #include <netiso/iso.h>
33 #include <netiso/iso_var.h>
34 #include <sys/protosw.h>
35
36 #include <ctype.h>
37 #include <err.h>
38 #include <errno.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 struct ifreq ifr, ridreq;
45 struct ifaliasreq addreq;
46 struct iso_ifreq iso_ridreq;
47 struct iso_aliasreq iso_addreq;
48 struct sockaddr_in netmask;
49
50 char name[30];
51 int flags;
52 int metric;
53 int nsellength = 1;
54 int setaddr;
55 int setipdst;
56 int doalias;
57 int clearaddr;
58 int newaddr = 1;
59 int s;
60 extern int errno;
61
62 int setifflags(), setifaddr(), setifdstaddr(), setifnetmask();
63 int setifmetric(), setifbroadaddr(), setifipdst();
64 int notealias(), setsnpaoffset(), setnsellength(), notrailers();
65
66 #define NEXTARG 0xffffff
67
68 struct cmd {
69 char *c_name;
70 int c_parameter; /* NEXTARG means next argv */
71 int (*c_func)();
72 } cmds[] = {
73 { "up", IFF_UP, setifflags } ,
74 { "down", -IFF_UP, setifflags },
75 { "trailers", -1, notrailers },
76 { "-trailers", 1, notrailers },
77 { "arp", -IFF_NOARP, setifflags },
78 { "-arp", IFF_NOARP, setifflags },
79 { "debug", IFF_DEBUG, setifflags },
80 { "-debug", -IFF_DEBUG, setifflags },
81 { "alias", IFF_UP, notealias },
82 { "-alias", -IFF_UP, notealias },
83 { "delete", -IFF_UP, notealias },
84 #ifdef notdef
85 #define EN_SWABIPS 0x1000
86 { "swabips", EN_SWABIPS, setifflags },
87 { "-swabips", -EN_SWABIPS, setifflags },
88 #endif
89 { "netmask", NEXTARG, setifnetmask },
90 { "metric", NEXTARG, setifmetric },
91 { "broadcast", NEXTARG, setifbroadaddr },
92 { "ipdst", NEXTARG, setifipdst },
93 { "snpaoffset", NEXTARG, setsnpaoffset },
94 { "nsellength", NEXTARG, setnsellength },
95 { "link0", IFF_LINK0, setifflags } ,
96 { "-link0", -IFF_LINK0, setifflags } ,
97 { "link1", IFF_LINK1, setifflags } ,
98 { "-link1", -IFF_LINK1, setifflags } ,
99 { "link2", IFF_LINK2, setifflags } ,
100 { "-link2", -IFF_LINK2, setifflags } ,
101 { 0, 0, setifaddr },
102 { 0, 0, setifdstaddr },
103 };
104
105 /*
106 * XNS support liberally adapted from code written at the University of
107 * Maryland principally by James O'Toole and Chris Torek.
108 */
109 int in_status(), in_getaddr();
110 int xns_status(), xns_getaddr();
111 int iso_status(), iso_getaddr();
112
113 /* Known address families */
114 struct afswtch {
115 char *af_name;
116 short af_af;
117 int (*af_status)();
118 int (*af_getaddr)();
119 int af_difaddr;
120 int af_aifaddr;
121 caddr_t af_ridreq;
122 caddr_t af_addreq;
123 } afs[] = {
124 #define C(x) ((caddr_t) &x)
125 { "inet", AF_INET, in_status, in_getaddr,
126 SIOCDIFADDR, SIOCAIFADDR, C(ridreq), C(addreq) },
127 { "ns", AF_NS, xns_status, xns_getaddr,
128 SIOCDIFADDR, SIOCAIFADDR, C(ridreq), C(addreq) },
129 { "iso", AF_ISO, iso_status, iso_getaddr,
130 SIOCDIFADDR_ISO, SIOCAIFADDR_ISO, C(iso_ridreq), C(iso_addreq) },
131 { 0, 0, 0, 0 }
132 };
133
134 struct afswtch *afp; /*the address family being set or asked about*/
135
main(argc,argv)136 main(argc, argv)
137 int argc;
138 char *argv[];
139 {
140 int af = AF_INET;
141 register struct afswtch *rafp;
142
143 if (argc < 2) {
144 fprintf(stderr, "usage: ifconfig interface\n%s%s%s%s%s",
145 "\t[ af [ address [ dest_addr ] ] [ up ] [ down ]",
146 "[ netmask mask ] ]\n",
147 "\t[ metric n ]\n",
148 "\t[ arp | -arp ]\n",
149 "\t[ link0 | -link0 ] [ link1 | -link1 ] [ link2 | -link2 ] \n");
150 exit(1);
151 }
152 argc--, argv++;
153 strncpy(name, *argv, sizeof(name));
154 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
155 argc--, argv++;
156 if (argc > 0) {
157 for (afp = rafp = afs; rafp->af_name; rafp++)
158 if (strcmp(rafp->af_name, *argv) == 0) {
159 afp = rafp; argc--; argv++;
160 break;
161 }
162 rafp = afp;
163 af = ifr.ifr_addr.sa_family = rafp->af_af;
164 }
165 s = socket(af, SOCK_DGRAM, 0);
166 if (s < 0) {
167 perror("ifconfig: socket");
168 exit(1);
169 }
170 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
171 Perror("ioctl (SIOCGIFFLAGS)");
172 exit(1);
173 }
174 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
175 flags = ifr.ifr_flags;
176 if (ioctl(s, SIOCGIFMETRIC, (caddr_t)&ifr) < 0)
177 perror("ioctl (SIOCGIFMETRIC)");
178 else
179 metric = ifr.ifr_metric;
180 if (argc == 0) {
181 status();
182 exit(0);
183 }
184 while (argc > 0) {
185 register struct cmd *p;
186
187 for (p = cmds; p->c_name; p++)
188 if (strcmp(*argv, p->c_name) == 0)
189 break;
190 if (p->c_name == 0 && setaddr)
191 p++; /* got src, do dst */
192 if (p->c_func) {
193 if (p->c_parameter == NEXTARG) {
194 if (argv[1] == NULL)
195 errx(1, "'%s' requires argument",
196 p->c_name);
197 (*p->c_func)(argv[1]);
198 argc--, argv++;
199 } else
200 (*p->c_func)(*argv, p->c_parameter);
201 }
202 argc--, argv++;
203 }
204 if (af == AF_ISO)
205 adjust_nsellength();
206 if (setipdst && af==AF_NS) {
207 struct nsip_req rq;
208 int size = sizeof(rq);
209
210 rq.rq_ns = addreq.ifra_addr;
211 rq.rq_ip = addreq.ifra_dstaddr;
212
213 if (setsockopt(s, 0, SO_NSIP_ROUTE, &rq, size) < 0)
214 Perror("Encapsulation Routing");
215 }
216 if (clearaddr) {
217 int ret;
218 strncpy(rafp->af_ridreq, name, sizeof ifr.ifr_name);
219 if ((ret = ioctl(s, rafp->af_difaddr, rafp->af_ridreq)) < 0) {
220 if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
221 /* means no previous address for interface */
222 } else
223 Perror("ioctl (SIOCDIFADDR)");
224 }
225 }
226 if (newaddr) {
227 strncpy(rafp->af_addreq, name, sizeof ifr.ifr_name);
228 if (ioctl(s, rafp->af_aifaddr, rafp->af_addreq) < 0)
229 Perror("ioctl (SIOCAIFADDR)");
230 }
231 exit(0);
232 }
233 #define RIDADDR 0
234 #define ADDR 1
235 #define MASK 2
236 #define DSTADDR 3
237
238 /*ARGSUSED*/
setifaddr(addr,param)239 setifaddr(addr, param)
240 char *addr;
241 short param;
242 {
243 /*
244 * Delay the ioctl to set the interface addr until flags are all set.
245 * The address interpretation may depend on the flags,
246 * and the flags may change when the address is set.
247 */
248 setaddr++;
249 if (doalias == 0)
250 clearaddr = 1;
251 (*afp->af_getaddr)(addr, (doalias >= 0 ? ADDR : RIDADDR));
252 }
253
setifnetmask(addr)254 setifnetmask(addr)
255 char *addr;
256 {
257 (*afp->af_getaddr)(addr, MASK);
258 }
259
setifbroadaddr(addr)260 setifbroadaddr(addr)
261 char *addr;
262 {
263 (*afp->af_getaddr)(addr, DSTADDR);
264 }
265
setifipdst(addr)266 setifipdst(addr)
267 char *addr;
268 {
269 in_getaddr(addr, DSTADDR);
270 setipdst++;
271 clearaddr = 0;
272 newaddr = 0;
273 }
274 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
275 /*ARGSUSED*/
notealias(addr,param)276 notealias(addr, param)
277 char *addr;
278 {
279 if (setaddr && doalias == 0 && param < 0)
280 bcopy((caddr_t)rqtosa(af_addreq),
281 (caddr_t)rqtosa(af_ridreq),
282 rqtosa(af_addreq)->sa_len);
283 doalias = param;
284 if (param < 0) {
285 clearaddr = 1;
286 newaddr = 0;
287 } else
288 clearaddr = 0;
289 }
290
291 /*ARGSUSED*/
notrailers(vname,value)292 notrailers(vname, value)
293 char *vname;
294 int value;
295 {
296 printf("Note: trailers are no longer sent, but always received\n");
297 }
298
299 /*ARGSUSED*/
setifdstaddr(addr,param)300 setifdstaddr(addr, param)
301 char *addr;
302 int param;
303 {
304 (*afp->af_getaddr)(addr, DSTADDR);
305 }
306
setifflags(vname,value)307 setifflags(vname, value)
308 char *vname;
309 short value;
310 {
311 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
312 Perror("ioctl (SIOCGIFFLAGS)");
313 exit(1);
314 }
315 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
316 flags = ifr.ifr_flags;
317
318 if (value < 0) {
319 value = -value;
320 flags &= ~value;
321 } else
322 flags |= value;
323 ifr.ifr_flags = flags;
324 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0)
325 Perror(vname);
326 }
327
setifmetric(val)328 setifmetric(val)
329 char *val;
330 {
331 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
332 ifr.ifr_metric = atoi(val);
333 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
334 perror("ioctl (set metric)");
335 }
336
setsnpaoffset(val)337 setsnpaoffset(val)
338 char *val;
339 {
340 iso_addreq.ifra_snpaoffset = atoi(val);
341 }
342
343 #define IFFBITS \
344 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS\7RUNNING\10NOARP\
345 \11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2\20MULTICAST"
346
347 /*
348 * Print the status of the interface. If an address family was
349 * specified, show it and it only; otherwise, show them all.
350 */
status()351 status()
352 {
353 register struct afswtch *p = afp;
354 short af = ifr.ifr_addr.sa_family;
355
356 printf("%s: ", name);
357 printb("flags", flags, IFFBITS);
358 if (metric)
359 printf(" metric %d", metric);
360 putchar('\n');
361 if ((p = afp) != NULL) {
362 (*p->af_status)(1);
363 } else for (p = afs; p->af_name; p++) {
364 ifr.ifr_addr.sa_family = p->af_af;
365 (*p->af_status)(0);
366 }
367 }
368
in_status(force)369 in_status(force)
370 int force;
371 {
372 struct sockaddr_in *sin;
373 char *inet_ntoa();
374
375 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
376 if (ioctl(s, SIOCGIFADDR, (caddr_t)&ifr) < 0) {
377 if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
378 if (!force)
379 return;
380 bzero((char *)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
381 } else
382 perror("ioctl (SIOCGIFADDR)");
383 }
384 sin = (struct sockaddr_in *)&ifr.ifr_addr;
385 printf("\tinet %s ", inet_ntoa(sin->sin_addr));
386 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
387 if (ioctl(s, SIOCGIFNETMASK, (caddr_t)&ifr) < 0) {
388 if (errno != EADDRNOTAVAIL)
389 perror("ioctl (SIOCGIFNETMASK)");
390 bzero((char *)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
391 } else
392 netmask.sin_addr =
393 ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
394 if (flags & IFF_POINTOPOINT) {
395 if (ioctl(s, SIOCGIFDSTADDR, (caddr_t)&ifr) < 0) {
396 if (errno == EADDRNOTAVAIL)
397 bzero((char *)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
398 else
399 perror("ioctl (SIOCGIFDSTADDR)");
400 }
401 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
402 sin = (struct sockaddr_in *)&ifr.ifr_dstaddr;
403 printf("--> %s ", inet_ntoa(sin->sin_addr));
404 }
405 printf("netmask 0x%x ", ntohl(netmask.sin_addr.s_addr));
406 if (flags & IFF_BROADCAST) {
407 if (ioctl(s, SIOCGIFBRDADDR, (caddr_t)&ifr) < 0) {
408 if (errno == EADDRNOTAVAIL)
409 bzero((char *)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
410 else
411 perror("ioctl (SIOCGIFADDR)");
412 }
413 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
414 sin = (struct sockaddr_in *)&ifr.ifr_addr;
415 if (sin->sin_addr.s_addr != 0)
416 printf("broadcast %s", inet_ntoa(sin->sin_addr));
417 }
418 putchar('\n');
419 }
420
421
xns_status(force)422 xns_status(force)
423 int force;
424 {
425 struct sockaddr_ns *sns;
426
427 close(s);
428 s = socket(AF_NS, SOCK_DGRAM, 0);
429 if (s < 0) {
430 if (errno == EPROTONOSUPPORT)
431 return;
432 perror("ifconfig: socket");
433 exit(1);
434 }
435 if (ioctl(s, SIOCGIFADDR, (caddr_t)&ifr) < 0) {
436 if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
437 if (!force)
438 return;
439 bzero((char *)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
440 } else
441 perror("ioctl (SIOCGIFADDR)");
442 }
443 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
444 sns = (struct sockaddr_ns *)&ifr.ifr_addr;
445 printf("\tns %s ", ns_ntoa(sns->sns_addr));
446 if (flags & IFF_POINTOPOINT) { /* by W. Nesheim@Cornell */
447 if (ioctl(s, SIOCGIFDSTADDR, (caddr_t)&ifr) < 0) {
448 if (errno == EADDRNOTAVAIL)
449 bzero((char *)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
450 else
451 Perror("ioctl (SIOCGIFDSTADDR)");
452 }
453 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
454 sns = (struct sockaddr_ns *)&ifr.ifr_dstaddr;
455 printf("--> %s ", ns_ntoa(sns->sns_addr));
456 }
457 putchar('\n');
458 }
459
iso_status(force)460 iso_status(force)
461 int force;
462 {
463 struct sockaddr_iso *siso;
464 struct iso_ifreq ifr;
465
466 close(s);
467 s = socket(AF_ISO, SOCK_DGRAM, 0);
468 if (s < 0) {
469 if (errno == EPROTONOSUPPORT)
470 return;
471 perror("ifconfig: socket");
472 exit(1);
473 }
474 bzero((caddr_t)&ifr, sizeof(ifr));
475 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
476 if (ioctl(s, SIOCGIFADDR_ISO, (caddr_t)&ifr) < 0) {
477 if (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT) {
478 if (!force)
479 return;
480 bzero((char *)&ifr.ifr_Addr, sizeof(ifr.ifr_Addr));
481 } else {
482 perror("ioctl (SIOCGIFADDR_ISO)");
483 exit(1);
484 }
485 }
486 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
487 siso = &ifr.ifr_Addr;
488 printf("\tiso %s ", iso_ntoa(&siso->siso_addr));
489 if (ioctl(s, SIOCGIFNETMASK_ISO, (caddr_t)&ifr) < 0) {
490 if (errno != EADDRNOTAVAIL)
491 perror("ioctl (SIOCGIFNETMASK_ISO)");
492 } else {
493 printf(" netmask %s ", iso_ntoa(&siso->siso_addr));
494 }
495 if (flags & IFF_POINTOPOINT) {
496 if (ioctl(s, SIOCGIFDSTADDR_ISO, (caddr_t)&ifr) < 0) {
497 if (errno == EADDRNOTAVAIL)
498 bzero((char *)&ifr.ifr_Addr, sizeof(ifr.ifr_Addr));
499 else
500 Perror("ioctl (SIOCGIFDSTADDR_ISO)");
501 }
502 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
503 siso = &ifr.ifr_Addr;
504 printf("--> %s ", iso_ntoa(&siso->siso_addr));
505 }
506 putchar('\n');
507 }
508
Perror(cmd)509 Perror(cmd)
510 char *cmd;
511 {
512 extern int errno;
513
514 switch (errno) {
515
516 case ENXIO:
517 errx(1, "%s: no such interface", cmd);
518 break;
519
520 case EPERM:
521 errx(1, "%s: permission denied", cmd);
522 break;
523
524 default:
525 err(1, "%s", cmd);
526 }
527 }
528
529 struct in_addr inet_makeaddr();
530
531 #define SIN(x) ((struct sockaddr_in *) &(x))
532 struct sockaddr_in *sintab[] = {
533 SIN(ridreq.ifr_addr), SIN(addreq.ifra_addr),
534 SIN(addreq.ifra_mask), SIN(addreq.ifra_broadaddr)};
535
in_getaddr(s,which)536 in_getaddr(s, which)
537 char *s;
538 {
539 register struct sockaddr_in *sin = sintab[which];
540 struct hostent *hp;
541 struct netent *np;
542 int val;
543
544 sin->sin_len = sizeof(*sin);
545 if (which != MASK)
546 sin->sin_family = AF_INET;
547
548 if ((val = inet_addr(s)) != -1)
549 sin->sin_addr.s_addr = val;
550 else if (hp = gethostbyname(s))
551 bcopy(hp->h_addr, (char *)&sin->sin_addr, hp->h_length);
552 else if (np = getnetbyname(s))
553 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
554 else
555 errx(1, "%s: bad value", s);
556 }
557
558 /*
559 * Print a value a la the %b format of the kernel's printf
560 */
printb(s,v,bits)561 printb(s, v, bits)
562 char *s;
563 register char *bits;
564 register unsigned short v;
565 {
566 register int i, any = 0;
567 register char c;
568
569 if (bits && *bits == 8)
570 printf("%s=%o", s, v);
571 else
572 printf("%s=%x", s, v);
573 bits++;
574 if (bits) {
575 putchar('<');
576 while (i = *bits++) {
577 if (v & (1 << (i-1))) {
578 if (any)
579 putchar(',');
580 any = 1;
581 for (; (c = *bits) > 32; bits++)
582 putchar(c);
583 } else
584 for (; *bits > 32; bits++)
585 ;
586 }
587 putchar('>');
588 }
589 }
590
591 #define SNS(x) ((struct sockaddr_ns *) &(x))
592 struct sockaddr_ns *snstab[] = {
593 SNS(ridreq.ifr_addr), SNS(addreq.ifra_addr),
594 SNS(addreq.ifra_mask), SNS(addreq.ifra_broadaddr)};
595
xns_getaddr(addr,which)596 xns_getaddr(addr, which)
597 char *addr;
598 {
599 struct sockaddr_ns *sns = snstab[which];
600 struct ns_addr ns_addr();
601
602 sns->sns_family = AF_NS;
603 sns->sns_len = sizeof(*sns);
604 sns->sns_addr = ns_addr(addr);
605 if (which == MASK)
606 printf("Attempt to set XNS netmask will be ineffectual\n");
607 }
608
609 #define SISO(x) ((struct sockaddr_iso *) &(x))
610 struct sockaddr_iso *sisotab[] = {
611 SISO(iso_ridreq.ifr_Addr), SISO(iso_addreq.ifra_addr),
612 SISO(iso_addreq.ifra_mask), SISO(iso_addreq.ifra_dstaddr)};
613
iso_getaddr(addr,which)614 iso_getaddr(addr, which)
615 char *addr;
616 {
617 register struct sockaddr_iso *siso = sisotab[which];
618 struct iso_addr *iso_addr();
619 siso->siso_addr = *iso_addr(addr);
620
621 if (which == MASK) {
622 siso->siso_len = TSEL(siso) - (caddr_t)(siso);
623 siso->siso_nlen = 0;
624 } else {
625 siso->siso_len = sizeof(*siso);
626 siso->siso_family = AF_ISO;
627 }
628 }
629
setnsellength(val)630 setnsellength(val)
631 char *val;
632 {
633 nsellength = atoi(val);
634 if (nsellength < 0)
635 errx(1, "Negative NSEL length is absurd");
636 if (afp == 0 || afp->af_af != AF_ISO)
637 errx(1, "Setting NSEL length valid only for iso");
638 }
639
fixnsel(s)640 fixnsel(s)
641 register struct sockaddr_iso *s;
642 {
643 if (s->siso_family == 0)
644 return;
645 s->siso_tlen = nsellength;
646 }
647
adjust_nsellength()648 adjust_nsellength()
649 {
650 fixnsel(sisotab[RIDADDR]);
651 fixnsel(sisotab[ADDR]);
652 fixnsel(sisotab[DSTADDR]);
653 }
654