1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1988, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #if 0
33 #ifndef lint
34 static char sccsid[] = "From: @(#)route.c 8.6 (Berkeley) 4/28/95";
35 #endif /* not lint */
36 #endif
37
38 #include <sys/cdefs.h>
39 #include <sys/param.h>
40 #include <sys/protosw.h>
41 #include <sys/socket.h>
42 #include <sys/socketvar.h>
43 #include <sys/sysctl.h>
44 #include <sys/time.h>
45
46 #include <net/ethernet.h>
47 #include <net/if.h>
48 #include <net/if_dl.h>
49 #include <net/if_types.h>
50 #include <net/route.h>
51
52 #include <netinet/in.h>
53 #include <netgraph/ng_socket.h>
54
55 #include <arpa/inet.h>
56 #include <ifaddrs.h>
57 #include <libutil.h>
58 #include <netdb.h>
59 #include <stdbool.h>
60 #include <stdint.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <stdbool.h>
64 #include <string.h>
65 #include <sysexits.h>
66 #include <unistd.h>
67 #include <err.h>
68 #include <libxo/xo.h>
69 #include "netstat.h"
70 #include "common.h"
71 #include "nl_defs.h"
72
73 /*
74 * Definitions for showing gateway flags.
75 */
76 struct bits rt_bits[] = {
77 { RTF_UP, 'U', "up" },
78 { RTF_GATEWAY, 'G', "gateway" },
79 { RTF_HOST, 'H', "host" },
80 { RTF_REJECT, 'R', "reject" },
81 { RTF_DYNAMIC, 'D', "dynamic" },
82 { RTF_MODIFIED, 'M', "modified" },
83 { RTF_DONE, 'd', "done" }, /* Completed -- for routing msgs only */
84 { RTF_XRESOLVE, 'X', "xresolve" },
85 { RTF_STATIC, 'S', "static" },
86 { RTF_PROTO1, '1', "proto1" },
87 { RTF_PROTO2, '2', "proto2" },
88 { RTF_PROTO3, '3', "proto3" },
89 { RTF_BLACKHOLE,'B', "blackhole" },
90 { RTF_BROADCAST,'b', "broadcast" },
91 #ifdef RTF_LLINFO
92 { RTF_LLINFO, 'L', "llinfo" },
93 #endif
94 { 0 , 0, NULL }
95 };
96
97 static struct ifmap_entry *ifmap;
98 static size_t ifmap_size;
99 static struct timespec uptime;
100
101 static const char *netname4(in_addr_t, in_addr_t);
102 #ifdef INET6
103 static const char *netname6(struct sockaddr_in6 *, struct sockaddr_in6 *);
104 #endif
105 static void p_rtable_sysctl(int, int);
106 static void p_rtentry_sysctl(const char *name, struct rt_msghdr *);
107 static void p_flags(int, const char *);
108 static void domask(char *, size_t, u_long);
109
110
111 /*
112 * Print routing tables.
113 */
114 void
routepr(int fibnum,int af)115 routepr(int fibnum, int af)
116 {
117 size_t intsize;
118 int numfibs;
119
120 if (live == 0)
121 return;
122
123 intsize = sizeof(int);
124 if (fibnum == -1 &&
125 sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1)
126 fibnum = 0;
127 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
128 numfibs = 1;
129 if (fibnum < 0 || fibnum > numfibs - 1)
130 errx(EX_USAGE, "%d: invalid fib", fibnum);
131 /*
132 * Since kernel & userland use different timebase
133 * (time_uptime vs time_second) and we are reading kernel memory
134 * directly we should do rt_expire --> expire_time conversion.
135 */
136 if (clock_gettime(CLOCK_UPTIME, &uptime) < 0)
137 err(EX_OSERR, "clock_gettime() failed");
138
139 xo_open_container("route-information");
140 xo_emit("{T:Routing tables}");
141 if (fibnum)
142 xo_emit(" ({L:fib}: {:fib/%d})", fibnum);
143 xo_emit("\n");
144 p_rtable_sysctl(fibnum, af);
145 xo_close_container("route-information");
146 }
147
148
149 /*
150 * Print address family header before a section of the routing table.
151 */
152 void
pr_family(int af1)153 pr_family(int af1)
154 {
155 const char *afname;
156
157 switch (af1) {
158 case AF_INET:
159 afname = "Internet";
160 break;
161 #ifdef INET6
162 case AF_INET6:
163 afname = "Internet6";
164 break;
165 #endif /*INET6*/
166 case AF_ISO:
167 afname = "ISO";
168 break;
169 case AF_CCITT:
170 afname = "X.25";
171 break;
172 case AF_NETGRAPH:
173 afname = "Netgraph";
174 break;
175 default:
176 afname = NULL;
177 break;
178 }
179 if (afname)
180 xo_emit("\n{k:address-family/%s}:\n", afname);
181 else
182 xo_emit("\n{L:Protocol Family} {k:address-family/%d}:\n", af1);
183 }
184
185 /* column widths; each followed by one space */
186 #define WID_IF_DEFAULT (Wflag ? IFNAMSIZ : 12) /* width of netif column */
187 #ifndef INET6
188 #define WID_DST_DEFAULT(af) 18 /* width of destination column */
189 #define WID_GW_DEFAULT(af) 18 /* width of gateway column */
190 #else
191 #define WID_DST_DEFAULT(af) \
192 ((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
193 #define WID_GW_DEFAULT(af) \
194 ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
195 #endif /*INET6*/
196
197 static int wid_dst;
198 static int wid_gw;
199 static int wid_flags;
200 static int wid_pksent;
201 static int wid_mtu;
202 static int wid_if;
203 static int wid_expire;
204
205 /*
206 * Print header for routing table columns.
207 */
208 static void
pr_rthdr(int af1 __unused)209 pr_rthdr(int af1 __unused)
210 {
211
212 if (Wflag) {
213 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
214 "{T:/%*.*s} {T:/%*.*s} {T:/%*s}\n",
215 wid_dst, wid_dst, "Destination",
216 wid_gw, wid_gw, "Gateway",
217 wid_flags, wid_flags, "Flags",
218 wid_mtu, wid_mtu, "Nhop#",
219 wid_mtu, wid_mtu, "Mtu",
220 wid_if, wid_if, "Netif",
221 wid_expire, "Expire");
222 } else {
223 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
224 "{T:/%*s}\n",
225 wid_dst, wid_dst, "Destination",
226 wid_gw, wid_gw, "Gateway",
227 wid_flags, wid_flags, "Flags",
228 wid_if, wid_if, "Netif",
229 wid_expire, "Expire");
230 }
231 }
232
233 static void
p_rtable_sysctl(int fibnum,int af)234 p_rtable_sysctl(int fibnum, int af)
235 {
236 size_t needed;
237 int mib[7];
238 char *buf, *next, *lim;
239 struct rt_msghdr *rtm;
240 struct sockaddr *sa;
241 int fam = AF_UNSPEC;
242 int need_table_close = false;
243
244 ifmap = prepare_ifmap(&ifmap_size);
245
246 mib[0] = CTL_NET;
247 mib[1] = PF_ROUTE;
248 mib[2] = 0;
249 mib[3] = af;
250 mib[4] = NET_RT_DUMP;
251 mib[5] = 0;
252 mib[6] = fibnum;
253 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
254 err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d estimate", af,
255 fibnum);
256 if ((buf = malloc(needed)) == NULL)
257 errx(2, "malloc(%lu)", (unsigned long)needed);
258 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0)
259 err(1, "sysctl: net.route.0.%d.dump.%d", af, fibnum);
260 lim = buf + needed;
261 xo_open_container("route-table");
262 xo_open_list("rt-family");
263 for (next = buf; next < lim; next += rtm->rtm_msglen) {
264 rtm = (struct rt_msghdr *)next;
265 if (rtm->rtm_version != RTM_VERSION)
266 continue;
267 /*
268 * Peek inside header to determine AF
269 */
270 sa = (struct sockaddr *)(rtm + 1);
271 /* Only print family first time. */
272 if (fam != sa->sa_family) {
273 if (need_table_close) {
274 xo_close_list("rt-entry");
275 xo_close_instance("rt-family");
276 }
277 need_table_close = true;
278
279 fam = sa->sa_family;
280 wid_dst = WID_DST_DEFAULT(fam);
281 wid_gw = WID_GW_DEFAULT(fam);
282 wid_flags = 6;
283 wid_pksent = 8;
284 wid_mtu = 6;
285 wid_if = WID_IF_DEFAULT;
286 wid_expire = 6;
287 xo_open_instance("rt-family");
288 pr_family(fam);
289 xo_open_list("rt-entry");
290
291 pr_rthdr(fam);
292 }
293 p_rtentry_sysctl("rt-entry", rtm);
294 }
295 if (need_table_close) {
296 xo_close_list("rt-entry");
297 xo_close_instance("rt-family");
298 }
299 xo_close_list("rt-family");
300 xo_close_container("route-table");
301 free(buf);
302 }
303
304 static void
p_rtentry_sysctl(const char * name,struct rt_msghdr * rtm)305 p_rtentry_sysctl(const char *name, struct rt_msghdr *rtm)
306 {
307 struct sockaddr *sa, *addr[RTAX_MAX];
308 char buffer[128];
309 char prettyname[128];
310 int i, protrusion;
311
312 xo_open_instance(name);
313 sa = (struct sockaddr *)(rtm + 1);
314 for (i = 0; i < RTAX_MAX; i++) {
315 if (rtm->rtm_addrs & (1 << i)) {
316 addr[i] = sa;
317 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa));
318 }
319 }
320
321 protrusion = p_sockaddr("destination", addr[RTAX_DST],
322 addr[RTAX_NETMASK],
323 rtm->rtm_flags, wid_dst);
324 protrusion = p_sockaddr("gateway", addr[RTAX_GATEWAY], NULL, RTF_HOST,
325 wid_gw - protrusion);
326 snprintf(buffer, sizeof(buffer), "{[:-%d}{:flags/%%s}{]:} ",
327 wid_flags - protrusion);
328 p_flags(rtm->rtm_flags, buffer);
329 /* Output path weight as non-visual property */
330 xo_emit("{e:weight/%u}", rtm->rtm_rmx.rmx_weight);
331 if (Wflag) {
332 /* XXX: use=0? */
333 xo_emit("{t:nhop/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_nhidx);
334
335 if (rtm->rtm_rmx.rmx_mtu != 0)
336 xo_emit("{t:mtu/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_mtu);
337 else
338 xo_emit("{P:/%*s} ", wid_mtu, "");
339 }
340
341 memset(prettyname, 0, sizeof(prettyname));
342 if (rtm->rtm_index < ifmap_size) {
343 strlcpy(prettyname, ifmap[rtm->rtm_index].ifname,
344 sizeof(prettyname));
345 if (*prettyname == '\0')
346 strlcpy(prettyname, "---", sizeof(prettyname));
347 }
348
349 if (Wflag)
350 xo_emit("{t:interface-name/%*s}", wid_if, prettyname);
351 else
352 xo_emit("{t:interface-name/%*.*s}", wid_if, wid_if,
353 prettyname);
354 if (rtm->rtm_rmx.rmx_expire) {
355 time_t expire_time;
356
357 if ((expire_time = rtm->rtm_rmx.rmx_expire - uptime.tv_sec) > 0)
358 xo_emit(" {:expire-time/%*d}", wid_expire,
359 (int)expire_time);
360 }
361
362 xo_emit("\n");
363 xo_close_instance(name);
364 }
365
366 int
p_sockaddr(const char * name,struct sockaddr * sa,struct sockaddr * mask,int flags,int width)367 p_sockaddr(const char *name, struct sockaddr *sa, struct sockaddr *mask,
368 int flags, int width)
369 {
370 const char *cp;
371 char buf[128];
372 int protrusion;
373
374 cp = fmt_sockaddr(sa, mask, flags);
375
376 if (width < 0) {
377 snprintf(buf, sizeof(buf), "{:%s/%%s} ", name);
378 xo_emit(buf, cp);
379 protrusion = 0;
380 } else {
381 if (Wflag != 0 || numeric_addr) {
382 snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%s}{]:} ",
383 -width, name);
384 xo_emit(buf, cp);
385 protrusion = strlen(cp) - width;
386 if (protrusion < 0)
387 protrusion = 0;
388 } else {
389 snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%-.*s}{]:} ",
390 -width, name);
391 xo_emit(buf, width, cp);
392 protrusion = 0;
393 }
394 }
395 return (protrusion);
396 }
397
398 const char *
fmt_sockaddr(struct sockaddr * sa,struct sockaddr * mask,int flags)399 fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
400 {
401 static char buf[128];
402 const char *cp;
403
404 if (sa == NULL)
405 return ("null");
406
407 switch(sa->sa_family) {
408 #ifdef INET6
409 case AF_INET6:
410 /*
411 * The sa6->sin6_scope_id must be filled here because
412 * this sockaddr is extracted from kmem(4) directly
413 * and has KAME-specific embedded scope id in
414 * sa6->sin6_addr.s6_addr[2].
415 */
416 in6_fillscopeid(satosin6(sa));
417 /* FALLTHROUGH */
418 #endif /*INET6*/
419 case AF_INET:
420 if (flags & RTF_HOST)
421 cp = routename(sa, numeric_addr);
422 else if (mask)
423 cp = netname(sa, mask);
424 else
425 cp = netname(sa, NULL);
426 break;
427 case AF_NETGRAPH:
428 {
429 strlcpy(buf, ((struct sockaddr_ng *)sa)->sg_data,
430 sizeof(buf));
431 cp = buf;
432 break;
433 }
434 case AF_LINK:
435 {
436 #if 0
437 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
438
439 /* Interface route. */
440 if (sdl->sdl_nlen)
441 cp = sdl->sdl_data;
442 else
443 #endif
444 cp = routename(sa, 1);
445 break;
446 }
447 default:
448 {
449 u_char *s = (u_char *)sa->sa_data, *slim;
450 char *cq, *cqlim;
451
452 cq = buf;
453 slim = sa->sa_len + (u_char *) sa;
454 cqlim = cq + sizeof(buf) - sizeof(" ffff");
455 snprintf(cq, sizeof(buf), "(%d)", sa->sa_family);
456 cq += strlen(cq);
457 while (s < slim && cq < cqlim) {
458 snprintf(cq, sizeof(" ff"), " %02x", *s++);
459 cq += strlen(cq);
460 if (s < slim) {
461 snprintf(cq, sizeof("ff"), "%02x", *s++);
462 cq += strlen(cq);
463 }
464 }
465 cp = buf;
466 }
467 }
468
469 return (cp);
470 }
471
472 static void
p_flags(int f,const char * format)473 p_flags(int f, const char *format)
474 {
475
476 print_flags_generic(f, rt_bits, format, "flags_pretty");
477 }
478
479
480 char *
routename(struct sockaddr * sa,int flags)481 routename(struct sockaddr *sa, int flags)
482 {
483 static char line[NI_MAXHOST];
484 int error, f;
485
486 f = (flags) ? NI_NUMERICHOST : 0;
487 error = getnameinfo(sa, sa->sa_len, line, sizeof(line),
488 NULL, 0, f);
489 if (error) {
490 const void *src;
491 switch (sa->sa_family) {
492 #ifdef INET
493 case AF_INET:
494 src = &satosin(sa)->sin_addr;
495 break;
496 #endif /* INET */
497 #ifdef INET6
498 case AF_INET6:
499 src = &satosin6(sa)->sin6_addr;
500 break;
501 #endif /* INET6 */
502 default:
503 return(line);
504 }
505 inet_ntop(sa->sa_family, src, line, sizeof(line) - 1);
506 return (line);
507 }
508 trimdomain(line, strlen(line));
509
510 return (line);
511 }
512
513 #define NSHIFT(m) ( \
514 (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT : \
515 (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT : \
516 (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT : \
517 0)
518
519 static void
domask(char * dst,size_t buflen,u_long mask)520 domask(char *dst, size_t buflen, u_long mask)
521 {
522 int b, i;
523
524 if (mask == 0) {
525 *dst = '\0';
526 return;
527 }
528 i = 0;
529 for (b = 0; b < 32; b++)
530 if (mask & (1 << b)) {
531 int bb;
532
533 i = b;
534 for (bb = b+1; bb < 32; bb++)
535 if (!(mask & (1 << bb))) {
536 i = -1; /* noncontig */
537 break;
538 }
539 break;
540 }
541 if (i == -1)
542 snprintf(dst, buflen, "&0x%lx", mask);
543 else
544 snprintf(dst, buflen, "/%d", 32-i);
545 }
546
547 /*
548 * Return the name of the network whose address is given.
549 */
550 const char *
netname(struct sockaddr * sa,struct sockaddr * mask)551 netname(struct sockaddr *sa, struct sockaddr *mask)
552 {
553 switch (sa->sa_family) {
554 case AF_INET:
555 if (mask != NULL)
556 return (netname4(satosin(sa)->sin_addr.s_addr,
557 satosin(mask)->sin_addr.s_addr));
558 else
559 return (netname4(satosin(sa)->sin_addr.s_addr,
560 INADDR_ANY));
561 break;
562 #ifdef INET6
563 case AF_INET6:
564 return (netname6(satosin6(sa), satosin6(mask)));
565 #endif /* INET6 */
566 default:
567 return (NULL);
568 }
569 }
570
571 static const char *
netname4(in_addr_t in,in_addr_t mask)572 netname4(in_addr_t in, in_addr_t mask)
573 {
574 char *cp = 0;
575 static char line[MAXHOSTNAMELEN + sizeof("&0xffffffff")];
576 char nline[INET_ADDRSTRLEN];
577 struct netent *np = 0;
578 in_addr_t i;
579
580 if (in == INADDR_ANY && mask == 0) {
581 strlcpy(line, "default", sizeof(line));
582 return (line);
583 }
584
585 /* It is ok to supply host address. */
586 in &= mask;
587
588 i = ntohl(in);
589 if (!numeric_addr && i) {
590 np = getnetbyaddr(i >> NSHIFT(ntohl(mask)), AF_INET);
591 if (np != NULL) {
592 cp = np->n_name;
593 trimdomain(cp, strlen(cp));
594 }
595 }
596 if (cp != NULL)
597 strlcpy(line, cp, sizeof(line));
598 else {
599 inet_ntop(AF_INET, &in, nline, sizeof(nline));
600 strlcpy(line, nline, sizeof(line));
601 domask(line + strlen(line), sizeof(line) - strlen(line), ntohl(mask));
602 }
603
604 return (line);
605 }
606
607 #undef NSHIFT
608
609 #ifdef INET6
610 void
in6_fillscopeid(struct sockaddr_in6 * sa6)611 in6_fillscopeid(struct sockaddr_in6 *sa6)
612 {
613 #if defined(__KAME__)
614 /*
615 * XXX: This is a special workaround for KAME kernels.
616 * sin6_scope_id field of SA should be set in the future.
617 */
618 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) ||
619 IN6_IS_ADDR_MC_NODELOCAL(&sa6->sin6_addr) ||
620 IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr)) {
621 if (sa6->sin6_scope_id == 0)
622 sa6->sin6_scope_id =
623 ntohs(*(u_int16_t *)&sa6->sin6_addr.s6_addr[2]);
624 sa6->sin6_addr.s6_addr[2] = sa6->sin6_addr.s6_addr[3] = 0;
625 }
626 #endif
627 }
628
629 /* Mask to length table. To check an invalid value, (length + 1) is used. */
630 static const u_char masktolen[256] = {
631 [0xff] = 8 + 1,
632 [0xfe] = 7 + 1,
633 [0xfc] = 6 + 1,
634 [0xf8] = 5 + 1,
635 [0xf0] = 4 + 1,
636 [0xe0] = 3 + 1,
637 [0xc0] = 2 + 1,
638 [0x80] = 1 + 1,
639 [0x00] = 0 + 1,
640 };
641
642 static const char *
netname6(struct sockaddr_in6 * sa6,struct sockaddr_in6 * mask)643 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
644 {
645 static char line[NI_MAXHOST + sizeof("/xxx") - 1];
646 struct sockaddr_in6 addr;
647 char nline[NI_MAXHOST];
648 char maskbuf[sizeof("/xxx")];
649 u_char *p, *lim;
650 u_char masklen;
651 int i;
652 bool illegal = false;
653
654 if (mask) {
655 p = (u_char *)&mask->sin6_addr;
656 for (masklen = 0, lim = p + 16; p < lim; p++) {
657 if (masktolen[*p] > 0) {
658 /* -1 is required. */
659 masklen += (masktolen[*p] - 1);
660 } else
661 illegal = true;
662 }
663 if (illegal)
664 xo_error("illegal prefixlen\n");
665
666 memcpy(&addr, sa6, sizeof(addr));
667 for (i = 0; i < 16; ++i)
668 addr.sin6_addr.s6_addr[i] &=
669 mask->sin6_addr.s6_addr[i];
670 sa6 = &addr;
671 }
672 else
673 masklen = 128;
674
675 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
676 return("default");
677
678 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, nline, sizeof(nline),
679 NULL, 0, NI_NUMERICHOST);
680 if (numeric_addr)
681 strlcpy(line, nline, sizeof(line));
682 else
683 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line,
684 sizeof(line), NULL, 0, 0);
685 if (numeric_addr || strcmp(line, nline) == 0) {
686 snprintf(maskbuf, sizeof(maskbuf), "/%d", masklen);
687 strlcat(line, maskbuf, sizeof(line));
688 }
689
690 return (line);
691 }
692 #endif /*INET6*/
693
694 /*
695 * Print routing statistics
696 */
697 void
rt_stats(void)698 rt_stats(void)
699 {
700 struct rtstat rtstat;
701 u_long rtsaddr;
702
703 if ((rtsaddr = nl[N_RTSTAT].n_value) == 0) {
704 xo_emit("{W:rtstat: symbol not in namelist}\n");
705 return;
706 }
707 kread_counters(rtsaddr, (char *)&rtstat, sizeof (rtstat));
708 xo_emit("{T:routing}:\n");
709
710 #define p(f, m) if (rtstat.f || sflag <= 1) \
711 xo_emit(m, rtstat.f, plural(rtstat.f))
712
713 p(rts_badredirect, "\t{:bad-redirects/%ju} "
714 "{N:/bad routing redirect%s}\n");
715 p(rts_dynamic, "\t{:dynamically-created/%ju} "
716 "{N:/dynamically created route%s}\n");
717 p(rts_newgateway, "\t{:new-gateways/%ju} "
718 "{N:/new gateway%s due to redirects}\n");
719 p(rts_unreach, "\t{:unreachable-destination/%ju} "
720 "{N:/destination%s found unreachable}\n");
721 p(rts_wildcard, "\t{:wildcard-uses/%ju} "
722 "{N:/use%s of a wildcard route}\n");
723 #undef p
724 }
725