1 /* $NetBSD: rtutil.c,v 1.11 2020/08/29 19:27:40 christos Exp $ */
2 /* $OpenBSD: show.c,v 1.1 2006/05/27 19:16:37 claudio Exp $ */
3
4 /*
5 * Copyright (c) 1983, 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/param.h>
34 #include <sys/protosw.h>
35 #include <sys/socket.h>
36 #include <sys/sysctl.h>
37
38 #include <net/if.h>
39 #include <net/if_dl.h>
40 #include <net/if_types.h>
41 #include <net/pfvar.h>
42 #include <net/pfkeyv2.h>
43 #include <net/route.h>
44 #include <netinet/in.h>
45 #include <netinet/if_ether.h>
46 #include <netatalk/at.h>
47 #include <netmpls/mpls.h>
48 #include <arpa/inet.h>
49
50 #include <err.h>
51 #include <errno.h>
52 #include <netdb.h>
53 #include <stdio.h>
54 #include <stddef.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <unistd.h>
58
59 #include "prog_ops.h"
60 #include "rtutil.h"
61
62 #define PLEN (LONG_BIT / 4 + 2)
63 #define PFKEYV2_CHUNK sizeof(u_int64_t)
64 static char *link_print(const struct sockaddr *);
65
66 /*
67 * Definitions for showing gateway flags.
68 */
69 struct bits {
70 int b_mask;
71 char b_val;
72 };
73 static const struct bits bits[] = {
74 { RTF_UP, 'U' },
75 { RTF_GATEWAY, 'G' },
76 { RTF_HOST, 'H' },
77 { RTF_REJECT, 'R' },
78 { RTF_BLACKHOLE, 'B' },
79 { RTF_DYNAMIC, 'D' },
80 { RTF_MODIFIED, 'M' },
81 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */
82 { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */
83 /* { RTF_CLONING, 'C' }, */
84 { RTF_CONNECTED, 'C' },
85 /* { RTF_XRESOLVE, 'X' }, */
86 { RTF_LLDATA, 'L' },
87 { RTF_STATIC, 'S' },
88 { RTF_PROTO1, '1' },
89 { RTF_PROTO2, '2' },
90 /* { RTF_PROTO3, '3' }, */
91 /* { RTF_CLONED, 'c' }, */
92 /* { RTF_JUMBO, 'J' }, */
93 { RTF_ANNOUNCE, 'p' },
94 { RTF_LOCAL, 'l'},
95 { RTF_BROADCAST, 'b'},
96 { 0, 0 }
97 };
98
99 #ifndef SMALL
100 static void p_tag(const struct sockaddr *sa);
101 #endif
102 static void p_rtentry(struct rt_msghdr *, int, int);
103
104 /*
105 * Print routing tables.
106 */
107 void
p_rttables(int paf,int flags,int pflags,int interesting)108 p_rttables(int paf, int flags, int pflags, int interesting)
109 {
110 struct rt_msghdr *rtm;
111 char *buf = NULL, *next, *lim = NULL;
112 size_t needed;
113 int mib[6];
114 struct sockaddr *sa;
115
116 mib[0] = CTL_NET;
117 mib[1] = PF_ROUTE;
118 mib[2] = 0;
119 mib[3] = paf;
120 mib[4] = NET_RT_DUMP;
121 mib[5] = 0;
122 if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
123 err(1, "route-sysctl-estimate");
124 if (needed > 0) {
125 if ((buf = malloc(needed)) == 0)
126 err(1, NULL);
127 if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
128 err(1, "sysctl of routing table");
129 lim = buf + needed;
130 }
131
132 printf("Routing tables\n");
133
134 if (buf) {
135 for (next = buf; next < lim; next += rtm->rtm_msglen) {
136 rtm = (struct rt_msghdr *)next;
137 sa = (struct sockaddr *)(rtm + 1);
138 if ((rtm->rtm_flags & pflags) != pflags)
139 continue;
140 if (paf != AF_UNSPEC && sa->sa_family != paf)
141 continue;
142 p_rtentry(rtm, flags, interesting);
143 }
144 free(buf);
145 buf = NULL;
146 }
147
148 if (paf != 0 && paf != PF_KEY)
149 return;
150
151 #if 0 /* XXX-elad */
152 mib[0] = CTL_NET;
153 mib[1] = PF_KEY;
154 mib[2] = PF_KEY_V2;
155 mib[3] = NET_KEY_SPD_DUMP;
156 mib[4] = mib[5] = 0;
157
158 if (prog_sysctl(mib, 4, NULL, &needed, NULL, 0) == -1) {
159 if (errno == ENOPROTOOPT)
160 return;
161 err(1, "spd-sysctl-estimate");
162 }
163 if (needed > 0) {
164 if ((buf = malloc(needed)) == 0)
165 err(1, NULL);
166 if (prog_sysctl(mib, 4, buf, &needed, NULL, 0) == -1)
167 err(1,"sysctl of spd");
168 lim = buf + needed;
169 }
170
171 if (buf) {
172 printf("\nEncap:\n");
173
174 for (next = buf; next < lim; next += msg->sadb_msg_len *
175 PFKEYV2_CHUNK) {
176 msg = (struct sadb_msg *)next;
177 if (msg->sadb_msg_len == 0)
178 break;
179 p_pfkentry(msg);
180 }
181 free(buf);
182 buf = NULL;
183 }
184 #endif /* 0 */
185 }
186
187 /*
188 * column widths; each followed by one space
189 * width of destination/gateway column
190 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 = 34
191 * strlen("aaaa:bbbb:cccc:dddd:eeee:ffff:gggg:hhhh") == 39
192 */
193 #ifndef INET6
194 #define WID_DST(af) 18 /* width of destination column */
195 #define WID_GW(af) 18 /* width of gateway column */
196 #else
197 #define WID_DST(af) ((af) == AF_INET6 ? ((flags & RT_NFLAG) ? 39 : 18) : 18)
198 #define WID_GW(af) ((af) == AF_INET6 ? ((flags & RT_NFLAG) ? 30 : 18) : 18)
199 #endif
200
201 /*
202 * Print header for routing table columns.
203 */
204 void
p_rthdr(int paf,int flags)205 p_rthdr(int paf, int flags)
206 {
207 #ifndef SMALL
208 if (flags & RT_AFLAG)
209 printf("%-*.*s ", PLEN, PLEN, "Address");
210 if (paf == PF_KEY) {
211 printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
212 "Source", "Port", "Destination",
213 "Port", "Proto", "SA(Address/Proto/Type/Direction)");
214 return;
215 }
216 if (flags & RT_TFLAG) {
217 printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %7.7s"
218 " %s\n", WID_DST(paf), WID_DST(paf), "Destination",
219 WID_GW(paf), WID_GW(paf), "Gateway",
220 "Flags", "Refs", "Use", "Mtu", "Tag", "Interface");
221 return;
222 }
223 #endif
224 #ifndef SMALL
225 printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %s\n",
226 WID_DST(paf), WID_DST(paf), "Destination",
227 WID_GW(paf), WID_GW(paf), "Gateway",
228 "Flags", "Refs", "Use", "Mtu", "Interface");
229 #else
230 printf("%-*.*s %-*.*s %-6.6s\n",
231 WID_DST(paf), WID_DST(paf), "Destination",
232 WID_GW(paf), WID_GW(paf), "Gateway",
233 "Flags");
234 #endif
235 }
236
237 static void
get_rtaddrs(int addrs,struct sockaddr * sa,struct sockaddr ** rti_info)238 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
239 {
240 int i;
241
242 for (i = 0; i < RTAX_MAX; i++) {
243 if (addrs & (1 << i)) {
244 rti_info[i] = sa;
245 sa = (struct sockaddr *)((char *)(sa) +
246 RT_ROUNDUP(sa->sa_len));
247 } else
248 rti_info[i] = NULL;
249 }
250 }
251
252 /*
253 * Print a routing table entry.
254 */
255 static void
p_rtentry(struct rt_msghdr * rtm,int flags,int interesting)256 p_rtentry(struct rt_msghdr *rtm, int flags, int interesting)
257 {
258 static int old_af = -1;
259 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
260 struct sockaddr *mask, *rti_info[RTAX_MAX];
261 #ifndef SMALL
262 char ifbuf[IF_NAMESIZE];
263 #endif
264
265 if ((flags & RT_LFLAG) && (rtm->rtm_flags & RTF_LLDATA))
266 return;
267
268 if (old_af != sa->sa_family) {
269 old_af = sa->sa_family;
270 p_family(sa->sa_family);
271 p_rthdr(sa->sa_family, flags);
272 }
273 get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
274
275 mask = rti_info[RTAX_NETMASK];
276 if ((sa = rti_info[RTAX_DST]) == NULL)
277 return;
278
279 p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family), flags);
280 p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
281 WID_GW(sa->sa_family), flags);
282 p_flags(rtm->rtm_flags & interesting);
283 #if 0 /* XXX-elad */
284 printf("%6d %8"PRId64" ", (int)rtm->rtm_rmx.rmx_refcnt,
285 rtm->rtm_rmx.rmx_pksent);
286 #else
287 printf("%6s %8s ", "-", "-");
288 #endif
289 #ifndef SMALL
290 if (rtm->rtm_rmx.rmx_mtu)
291 printf("%6"PRId64, rtm->rtm_rmx.rmx_mtu);
292 else
293 printf("%6s", "-");
294 putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
295 if (flags & RT_TFLAG)
296 p_tag(rti_info[RTAX_TAG]);
297 printf(" %.16s", if_indextoname(rtm->rtm_index, ifbuf));
298 putchar('\n');
299 if (flags & RT_VFLAG)
300 p_rtrmx(&rtm->rtm_rmx);
301 #else
302 putchar('\n');
303 #endif
304 }
305
306 /*
307 * Print address family header before a section of the routing table.
308 */
309 void
p_family(int paf)310 p_family(int paf)
311 {
312 const char *afname;
313
314 switch (paf) {
315 case AF_INET:
316 afname = "Internet";
317 break;
318 #ifdef INET6
319 case AF_INET6:
320 afname = "Internet6";
321 break;
322 #endif
323 case PF_KEY:
324 afname = "Encap";
325 break;
326 case AF_APPLETALK:
327 afname = "AppleTalk";
328 break;
329 #ifndef SMALL
330 case AF_MPLS:
331 afname = "MPLS";
332 break;
333 #endif
334 default:
335 afname = NULL;
336 break;
337 }
338 if (afname)
339 printf("\n%s:\n", afname);
340 else
341 printf("\nProtocol Family %d:\n", paf);
342 }
343
344 void
p_sockaddr(const struct sockaddr * sa,const struct sockaddr * mask,int rflags,int width,int flags)345 p_sockaddr(const struct sockaddr *sa, const struct sockaddr *mask, int rflags,
346 int width, int flags)
347 {
348 char *cp;
349
350 switch (sa->sa_family) {
351 #ifdef INET6
352 case AF_INET6:
353 {
354 struct sockaddr_in6 sa6 = *(const struct sockaddr_in6 *)sa;
355
356 inet6_getscopeid(&sa6, INET6_IS_ADDR_LINKLOCAL|
357 INET6_IS_ADDR_MC_LINKLOCAL);
358 if (rflags & RTF_HOST)
359 cp = routename((const struct sockaddr *)&sa6, flags);
360 else
361 cp = netname((const struct sockaddr *)&sa6, mask, flags);
362 break;
363 }
364 #endif
365 default:
366 if ((rflags & RTF_HOST) || mask == NULL)
367 cp = routename(sa, flags);
368 else
369 cp = netname(sa, mask, flags);
370 break;
371 }
372 if (width < 0)
373 printf("%s", cp);
374 else {
375 if (flags & RT_NFLAG)
376 printf("%-*s ", width, cp);
377 else
378 printf("%-*.*s ", width, width, cp);
379 }
380 }
381
382 void
p_flags(int f)383 p_flags(int f)
384 {
385 char name[33], *flags;
386 const struct bits *p = bits;
387
388 for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++)
389 if (p->b_mask & f)
390 *flags++ = p->b_val;
391 *flags = '\0';
392 printf("%-6.6s ", name);
393 }
394
395 #ifndef SMALL
396 void
p_rtrmx(const struct rt_metrics * rmx)397 p_rtrmx(const struct rt_metrics *rmx)
398 {
399 printf("\texpire %10"PRId64"%c recvpipe %10"PRIu64"%c "
400 "sendpipe %10"PRIu64"%c\n",
401 (int64_t)rmx->rmx_expire,
402 (rmx->rmx_locks & RTV_EXPIRE) ? 'L' : ' ', rmx->rmx_recvpipe,
403 (rmx->rmx_locks & RTV_RPIPE) ? 'L' : ' ', rmx->rmx_sendpipe,
404 (rmx->rmx_locks & RTV_SPIPE) ? 'L' : ' ');
405 printf("\tssthresh %10"PRIu64"%c rtt %10"PRIu64"%c "
406 "rttvar %10"PRIu64"%c\n", rmx->rmx_ssthresh,
407 (rmx->rmx_locks & RTV_SSTHRESH) ? 'L' : ' ',
408 rmx->rmx_rtt, (rmx->rmx_locks & RTV_RTT) ? 'L' : ' ',
409 rmx->rmx_rttvar, (rmx->rmx_locks & RTV_RTTVAR) ? 'L' : ' ');
410 printf("\thopcount %10"PRIu64"%c\n",
411 rmx->rmx_hopcount, (rmx->rmx_locks & RTV_HOPCOUNT) ? 'L' : ' ');
412 }
413
414 static void
p_tag(const struct sockaddr * sa)415 p_tag(const struct sockaddr *sa)
416 {
417 char *line;
418
419 if (sa == NULL || sa->sa_family != AF_MPLS) {
420 printf("%7s", "-");
421 return;
422 }
423 line = mpls_ntoa(sa);
424 if (strlen(line) < 7)
425 printf("%7s", line);
426 else
427 printf("%s", line);
428 }
429 #endif
430
431 static char line[MAXHOSTNAMELEN];
432 static char domain[MAXHOSTNAMELEN];
433
434 char *
routename(const struct sockaddr * sa,int flags)435 routename(const struct sockaddr *sa, int flags)
436 {
437 char *cp = NULL;
438 static int first = 1;
439
440 if (first) {
441 first = 0;
442 if (gethostname(domain, sizeof(domain)) == 0 &&
443 (cp = strchr(domain, '.')))
444 (void)strlcpy(domain, cp + 1, sizeof(domain));
445 else
446 domain[0] = '\0';
447 cp = NULL;
448 }
449
450 if (sa->sa_len == 0) {
451 (void)strlcpy(line, "default", sizeof(line));
452 return (line);
453 }
454
455 switch (sa->sa_family) {
456 case AF_INET:
457 return routename4(
458 ((const struct sockaddr_in *)sa)->sin_addr.s_addr,
459 flags);
460 #ifdef INET6
461 case AF_INET6:
462 {
463 struct sockaddr_in6 sin6;
464
465 memset(&sin6, 0, sizeof(sin6));
466 memcpy(&sin6, sa, sa->sa_len);
467 sin6.sin6_len = sizeof(struct sockaddr_in6);
468 sin6.sin6_family = AF_INET6;
469 if (sa->sa_len == sizeof(struct sockaddr_in6))
470 inet6_getscopeid(&sin6, INET6_IS_ADDR_LINKLOCAL|
471 INET6_IS_ADDR_MC_LINKLOCAL);
472 return routename6(&sin6, flags);
473 }
474 #endif
475 case AF_LINK:
476 return link_print(sa);
477
478 #ifndef SMALL
479 case AF_MPLS:
480 return mpls_ntoa(sa);
481
482 case AF_APPLETALK:
483 (void)snprintf(line, sizeof(line), "atalk %d.%d",
484 ((const struct sockaddr_at *)sa)->sat_addr.s_net,
485 ((const struct sockaddr_at *)sa)->sat_addr.s_node);
486 break;
487 #endif
488
489 #if 0 /* XXX-elad */
490 case AF_UNSPEC:
491 if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) {
492 static char name[RTLABEL_LEN];
493 struct sockaddr_rtlabel *sr;
494
495 sr = (struct sockaddr_rtlabel *)sa;
496 strlcpy(name, sr->sr_label, sizeof(name));
497 return (name);
498 }
499 /* FALLTHROUGH */
500 #endif
501 default:
502 (void)snprintf(line, sizeof(line), "(%d) %s",
503 sa->sa_family, any_ntoa(sa));
504 break;
505 }
506 return (line);
507 }
508
509 char *
routename4(in_addr_t in,int flags)510 routename4(in_addr_t in, int flags)
511 {
512 const char *cp = NULL;
513 struct in_addr ina;
514 struct hostent *hp;
515
516 if (in == INADDR_ANY)
517 cp = "default";
518 if (!cp && (flags & RT_NFLAG) == 0) {
519 if ((hp = gethostbyaddr((char *)&in,
520 sizeof(in), AF_INET)) != NULL) {
521 char *p;
522 if ((p = strchr(hp->h_name, '.')) &&
523 !strcmp(p + 1, domain))
524 *p = '\0';
525 cp = hp->h_name;
526 }
527 }
528 ina.s_addr = in;
529 strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));
530
531 return (line);
532 }
533
534 #ifdef INET6
535 char *
routename6(const struct sockaddr_in6 * sin6,int flags)536 routename6(const struct sockaddr_in6 *sin6, int flags)
537 {
538 int niflags = 0;
539
540 if ((flags & RT_NFLAG))
541 niflags |= NI_NUMERICHOST;
542 else
543 niflags |= NI_NOFQDN;
544
545 if (getnameinfo((const struct sockaddr *)sin6, sin6->sin6_len,
546 line, sizeof(line), NULL, 0, niflags) != 0)
547 strncpy(line, "invalid", sizeof(line));
548
549 return (line);
550 }
551 #endif
552
553 /*
554 * Return the name of the network whose address is given.
555 * The address is assumed to be that of a net or subnet, not a host.
556 */
557 char *
netname4(const struct sockaddr_in * sa4,const struct sockaddr_in * mask,int flags)558 netname4(const struct sockaddr_in* sa4, const struct sockaddr_in *mask, int flags)
559 {
560 const char *cp = NULL;
561 struct netent *np = NULL;
562 int mbits;
563 in_addr_t in = sa4->sin_addr.s_addr;
564
565 if (mask) {
566 in_addr_t m = mask->sin_addr.s_addr ;
567 m = ntohl(m);
568 mbits = m ? 33 - ffs(m) : 0;
569 } else
570 mbits = 0;
571
572 in = ntohl(in);
573 if (in == INADDR_ANY && !mbits)
574 cp = "default";
575 else if (!(flags & RT_NFLAG) && in != INADDR_ANY) {
576 if ((np = getnetbyaddr(in, AF_INET)) != NULL)
577 cp = np->n_name;
578 }
579 if (cp)
580 strlcpy(line, cp, sizeof(line));
581 #define C(x) ((x) & 0xff)
582 else if (mbits < 9)
583 snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits);
584 else if (mbits < 17)
585 snprintf(line, sizeof(line), "%u.%u/%d",
586 C(in >> 24) , C(in >> 16), mbits);
587 else if (mbits < 25)
588 snprintf(line, sizeof(line), "%u.%u.%u/%d",
589 C(in >> 24), C(in >> 16), C(in >> 8), mbits);
590 else
591 snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24),
592 C(in >> 16), C(in >> 8), C(in), mbits);
593 #undef C
594 return line;
595 }
596
597 #ifdef INET6
598 char *
netname6(const struct sockaddr_in6 * sa6,const struct sockaddr_in6 * mask,int flags)599 netname6(const struct sockaddr_in6 *sa6, const struct sockaddr_in6 *mask, int flags)
600 {
601 struct sockaddr_in6 sin6;
602 const u_char *p;
603 int masklen, final = 0, illegal = 0;
604 int i, lim, flag, error;
605 char hbuf[NI_MAXHOST];
606
607 sin6 = *sa6;
608
609 flag = 0;
610 masklen = 0;
611 if (mask) {
612 lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr);
613 if (lim < 0)
614 lim = 0;
615 else if (lim > (int)sizeof(struct in6_addr))
616 lim = sizeof(struct in6_addr);
617 for (p = (const u_char *)&mask->sin6_addr, i = 0; i < lim; p++) {
618 if (final && *p) {
619 illegal++;
620 sin6.sin6_addr.s6_addr[i++] = 0x00;
621 continue;
622 }
623
624 switch (*p & 0xff) {
625 case 0xff:
626 masklen += 8;
627 break;
628 case 0xfe:
629 masklen += 7;
630 final++;
631 break;
632 case 0xfc:
633 masklen += 6;
634 final++;
635 break;
636 case 0xf8:
637 masklen += 5;
638 final++;
639 break;
640 case 0xf0:
641 masklen += 4;
642 final++;
643 break;
644 case 0xe0:
645 masklen += 3;
646 final++;
647 break;
648 case 0xc0:
649 masklen += 2;
650 final++;
651 break;
652 case 0x80:
653 masklen += 1;
654 final++;
655 break;
656 case 0x00:
657 final++;
658 break;
659 default:
660 final++;
661 illegal++;
662 break;
663 }
664
665 if (!illegal)
666 sin6.sin6_addr.s6_addr[i++] &= *p;
667 else
668 sin6.sin6_addr.s6_addr[i++] = 0x00;
669 }
670 while (i < (int)sizeof(struct in6_addr))
671 sin6.sin6_addr.s6_addr[i++] = 0x00;
672 } else
673 masklen = 128;
674
675 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
676 snprintf(line, sizeof(line), "default");
677 return (line);
678 }
679
680 if (illegal)
681 warnx("illegal prefixlen");
682
683 if (flags & RT_NFLAG)
684 flag |= NI_NUMERICHOST;
685 error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
686 hbuf, sizeof(hbuf), NULL, 0, flag);
687 if (error)
688 snprintf(hbuf, sizeof(hbuf), "invalid");
689
690 snprintf(line, sizeof(line), "%s/%d", hbuf, masklen);
691 return (line);
692 }
693 #endif
694
695 /*
696 * Return the name of the network whose address is given.
697 * The address is assumed to be that of a net or subnet, not a host.
698 */
699 char *
netname(const struct sockaddr * sa,const struct sockaddr * mask,int flags)700 netname(const struct sockaddr *sa, const struct sockaddr *mask, int flags)
701 {
702 switch (sa->sa_family) {
703
704 case AF_INET:
705 return netname4((const struct sockaddr_in *)sa,
706 (const struct sockaddr_in *)mask, flags);
707 #ifdef INET6
708 case AF_INET6:
709 return netname6((const struct sockaddr_in6 *)sa,
710 (const struct sockaddr_in6 *)mask, flags);
711 #endif
712 case AF_LINK:
713 return link_print(sa);
714 default:
715 snprintf(line, sizeof(line), "af %d: %s",
716 sa->sa_family, any_ntoa(sa));
717 break;
718 }
719 return (line);
720 }
721
722 static const char hexlist[] = "0123456789abcdef";
723
724 char *
any_ntoa(const struct sockaddr * sa)725 any_ntoa(const struct sockaddr *sa)
726 {
727 static char obuf[240];
728 const char *in = sa->sa_data;
729 char *out = obuf;
730 int len = sa->sa_len - offsetof(struct sockaddr, sa_data);
731
732 *out++ = 'Q';
733 do {
734 *out++ = hexlist[(*in >> 4) & 15];
735 *out++ = hexlist[(*in++) & 15];
736 *out++ = '.';
737 } while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]);
738 out[-1] = '\0';
739 return (obuf);
740 }
741
742 static char *
link_print(const struct sockaddr * sa)743 link_print(const struct sockaddr *sa)
744 {
745 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)sa;
746 const u_char *lla = (const u_char *)sdl->sdl_data + sdl->sdl_nlen;
747
748 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
749 sdl->sdl_slen == 0) {
750 (void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index);
751 return (line);
752 }
753 switch (sdl->sdl_type) {
754 case IFT_ETHER:
755 case IFT_CARP:
756 return ether_ntoa((const struct ether_addr *)lla);
757 default:
758 return link_ntoa(sdl);
759 }
760 }
761
762 #ifndef SMALL
763 char *
mpls_ntoa(const struct sockaddr * sa)764 mpls_ntoa(const struct sockaddr *sa)
765 {
766 static char obuf[16];
767 size_t olen;
768 const union mpls_shim *pms;
769 union mpls_shim ms;
770 int psize = sizeof(struct sockaddr_mpls);
771
772 pms = &((const struct sockaddr_mpls*)sa)->smpls_addr;
773 ms.s_addr = ntohl(pms->s_addr);
774
775 snprintf(obuf, sizeof(obuf), "%u", ms.shim.label);
776
777 while(psize < sa->sa_len) {
778 pms++;
779 ms.s_addr = ntohl(pms->s_addr);
780 olen = strlen(obuf);
781 snprintf(obuf + olen, sizeof(obuf) - olen, ",%u",
782 ms.shim.label);
783 psize+=sizeof(ms);
784 }
785 return obuf;
786 }
787 #endif
788
789 void
p_addr(const struct sockaddr * sa,const struct sockaddr * mask,int rflags,int flags)790 p_addr(const struct sockaddr *sa, const struct sockaddr *mask, int rflags, int flags)
791 {
792 p_sockaddr(sa, mask, rflags, WID_DST(sa->sa_family), flags);
793 }
794
795 void
p_gwaddr(const struct sockaddr * sa,int gwaf,int flags)796 p_gwaddr(const struct sockaddr *sa, int gwaf, int flags)
797 {
798 p_sockaddr(sa, 0, RTF_HOST, WID_GW(gwaf), flags);
799 }
800