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 __FBSDID("$FreeBSD$");
40
41 #include <sys/param.h>
42 #include <sys/protosw.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
45 #include <sys/sysctl.h>
46 #include <sys/time.h>
47
48 #include <net/ethernet.h>
49 #include <net/if.h>
50 #include <net/if_dl.h>
51 #include <net/if_types.h>
52 #include <net/route.h>
53
54 #include <netinet/in.h>
55 #include <netgraph/ng_socket.h>
56
57 #include <arpa/inet.h>
58 #include <ifaddrs.h>
59 #include <libutil.h>
60 #include <netdb.h>
61 #include <stdbool.h>
62 #include <stdint.h>
63 #include <stdio.h>
64 #include <stdlib.h>
65 #include <stdbool.h>
66 #include <string.h>
67 #include <sysexits.h>
68 #include <unistd.h>
69 #include <err.h>
70 #include <libxo/xo.h>
71 #include "netstat.h"
72 #include "common.h"
73 #include "nl_defs.h"
74
75 /*
76 * Definitions for showing gateway flags.
77 */
78 struct bits rt_bits[] = {
79 { RTF_UP, 'U', "up" },
80 { RTF_GATEWAY, 'G', "gateway" },
81 { RTF_HOST, 'H', "host" },
82 { RTF_REJECT, 'R', "reject" },
83 { RTF_DYNAMIC, 'D', "dynamic" },
84 { RTF_MODIFIED, 'M', "modified" },
85 { RTF_DONE, 'd', "done" }, /* Completed -- for routing msgs only */
86 { RTF_XRESOLVE, 'X', "xresolve" },
87 { RTF_STATIC, 'S', "static" },
88 { RTF_PROTO1, '1', "proto1" },
89 { RTF_PROTO2, '2', "proto2" },
90 { RTF_PROTO3, '3', "proto3" },
91 { RTF_BLACKHOLE,'B', "blackhole" },
92 { RTF_BROADCAST,'b', "broadcast" },
93 #ifdef RTF_LLINFO
94 { RTF_LLINFO, 'L', "llinfo" },
95 #endif
96 { 0 , 0, NULL }
97 };
98
99 static struct ifmap_entry *ifmap;
100 static size_t ifmap_size;
101 static struct timespec uptime;
102
103 static const char *netname4(in_addr_t, in_addr_t);
104 #ifdef INET6
105 static const char *netname6(struct sockaddr_in6 *, struct sockaddr_in6 *);
106 #endif
107 static void p_rtable_sysctl(int, int);
108 static void p_rtentry_sysctl(const char *name, struct rt_msghdr *);
109 static void p_flags(int, const char *);
110 static void domask(char *, size_t, u_long);
111
112
113 /*
114 * Print routing tables.
115 */
116 void
routepr(int fibnum,int af)117 routepr(int fibnum, int af)
118 {
119 size_t intsize;
120 int numfibs;
121
122 if (live == 0)
123 return;
124
125 intsize = sizeof(int);
126 if (fibnum == -1 &&
127 sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1)
128 fibnum = 0;
129 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
130 numfibs = 1;
131 if (fibnum < 0 || fibnum > numfibs - 1)
132 errx(EX_USAGE, "%d: invalid fib", fibnum);
133 /*
134 * Since kernel & userland use different timebase
135 * (time_uptime vs time_second) and we are reading kernel memory
136 * directly we should do rt_expire --> expire_time conversion.
137 */
138 if (clock_gettime(CLOCK_UPTIME, &uptime) < 0)
139 err(EX_OSERR, "clock_gettime() failed");
140
141 xo_open_container("route-information");
142 xo_emit("{T:Routing tables}");
143 if (fibnum)
144 xo_emit(" ({L:fib}: {:fib/%d})", fibnum);
145 xo_emit("\n");
146 p_rtable_sysctl(fibnum, af);
147 xo_close_container("route-information");
148 }
149
150
151 /*
152 * Print address family header before a section of the routing table.
153 */
154 void
pr_family(int af1)155 pr_family(int af1)
156 {
157 const char *afname;
158
159 switch (af1) {
160 case AF_INET:
161 afname = "Internet";
162 break;
163 #ifdef INET6
164 case AF_INET6:
165 afname = "Internet6";
166 break;
167 #endif /*INET6*/
168 case AF_ISO:
169 afname = "ISO";
170 break;
171 case AF_CCITT:
172 afname = "X.25";
173 break;
174 case AF_NETGRAPH:
175 afname = "Netgraph";
176 break;
177 default:
178 afname = NULL;
179 break;
180 }
181 if (afname)
182 xo_emit("\n{k:address-family/%s}:\n", afname);
183 else
184 xo_emit("\n{L:Protocol Family} {k:address-family/%d}:\n", af1);
185 }
186
187 /* column widths; each followed by one space */
188 #ifndef INET6
189 #define WID_DST_DEFAULT(af) 18 /* width of destination column */
190 #define WID_GW_DEFAULT(af) 18 /* width of gateway column */
191 #define WID_IF_DEFAULT(af) (Wflag ? 10 : 8) /* width of netif column */
192 #else
193 #define WID_DST_DEFAULT(af) \
194 ((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
195 #define WID_GW_DEFAULT(af) \
196 ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
197 #define WID_IF_DEFAULT(af) ((af) == AF_INET6 ? 8 : (Wflag ? 10 : 8))
198 #endif /*INET6*/
199
200 static int wid_dst;
201 static int wid_gw;
202 static int wid_flags;
203 static int wid_pksent;
204 static int wid_mtu;
205 static int wid_if;
206 static int wid_expire;
207
208 /*
209 * Print header for routing table columns.
210 */
211 static void
pr_rthdr(int af1 __unused)212 pr_rthdr(int af1 __unused)
213 {
214
215 if (Wflag) {
216 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
217 "{T:/%*.*s} {T:/%*.*s} {T:/%*s}\n",
218 wid_dst, wid_dst, "Destination",
219 wid_gw, wid_gw, "Gateway",
220 wid_flags, wid_flags, "Flags",
221 wid_mtu, wid_mtu, "Nhop#",
222 wid_mtu, wid_mtu, "Mtu",
223 wid_if, wid_if, "Netif",
224 wid_expire, "Expire");
225 } else {
226 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
227 "{T:/%*s}\n",
228 wid_dst, wid_dst, "Destination",
229 wid_gw, wid_gw, "Gateway",
230 wid_flags, wid_flags, "Flags",
231 wid_if, wid_if, "Netif",
232 wid_expire, "Expire");
233 }
234 }
235
236 static void
p_rtable_sysctl(int fibnum,int af)237 p_rtable_sysctl(int fibnum, int af)
238 {
239 size_t needed;
240 int mib[7];
241 char *buf, *next, *lim;
242 struct rt_msghdr *rtm;
243 struct sockaddr *sa;
244 int fam = AF_UNSPEC;
245 int need_table_close = false;
246
247 ifmap = prepare_ifmap(&ifmap_size);
248
249 mib[0] = CTL_NET;
250 mib[1] = PF_ROUTE;
251 mib[2] = 0;
252 mib[3] = af;
253 mib[4] = NET_RT_DUMP;
254 mib[5] = 0;
255 mib[6] = fibnum;
256 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
257 err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d estimate", af,
258 fibnum);
259 if ((buf = malloc(needed)) == NULL)
260 errx(2, "malloc(%lu)", (unsigned long)needed);
261 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0)
262 err(1, "sysctl: net.route.0.%d.dump.%d", af, fibnum);
263 lim = buf + needed;
264 xo_open_container("route-table");
265 xo_open_list("rt-family");
266 for (next = buf; next < lim; next += rtm->rtm_msglen) {
267 rtm = (struct rt_msghdr *)next;
268 if (rtm->rtm_version != RTM_VERSION)
269 continue;
270 /*
271 * Peek inside header to determine AF
272 */
273 sa = (struct sockaddr *)(rtm + 1);
274 /* Only print family first time. */
275 if (fam != sa->sa_family) {
276 if (need_table_close) {
277 xo_close_list("rt-entry");
278 xo_close_instance("rt-family");
279 }
280 need_table_close = true;
281
282 fam = sa->sa_family;
283 wid_dst = WID_DST_DEFAULT(fam);
284 wid_gw = WID_GW_DEFAULT(fam);
285 wid_flags = 6;
286 wid_pksent = 8;
287 wid_mtu = 6;
288 wid_if = WID_IF_DEFAULT(fam);
289 wid_expire = 6;
290 xo_open_instance("rt-family");
291 pr_family(fam);
292 xo_open_list("rt-entry");
293
294 pr_rthdr(fam);
295 }
296 p_rtentry_sysctl("rt-entry", rtm);
297 }
298 if (need_table_close) {
299 xo_close_list("rt-entry");
300 xo_close_instance("rt-family");
301 }
302 xo_close_list("rt-family");
303 xo_close_container("route-table");
304 free(buf);
305 }
306
307 static void
p_rtentry_sysctl(const char * name,struct rt_msghdr * rtm)308 p_rtentry_sysctl(const char *name, struct rt_msghdr *rtm)
309 {
310 struct sockaddr *sa, *addr[RTAX_MAX];
311 char buffer[128];
312 char prettyname[128];
313 int i, protrusion;
314
315 xo_open_instance(name);
316 sa = (struct sockaddr *)(rtm + 1);
317 for (i = 0; i < RTAX_MAX; i++) {
318 if (rtm->rtm_addrs & (1 << i)) {
319 addr[i] = sa;
320 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa));
321 }
322 }
323
324 protrusion = p_sockaddr("destination", addr[RTAX_DST],
325 addr[RTAX_NETMASK],
326 rtm->rtm_flags, wid_dst);
327 protrusion = p_sockaddr("gateway", addr[RTAX_GATEWAY], NULL, RTF_HOST,
328 wid_gw - protrusion);
329 snprintf(buffer, sizeof(buffer), "{[:-%d}{:flags/%%s}{]:} ",
330 wid_flags - protrusion);
331 p_flags(rtm->rtm_flags, buffer);
332 if (Wflag) {
333 /* XXX: use=0? */
334 xo_emit("{t:nhop/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_nhidx);
335
336 if (rtm->rtm_rmx.rmx_mtu != 0)
337 xo_emit("{t:mtu/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_mtu);
338 else
339 xo_emit("{P:/%*s} ", wid_mtu, "");
340 }
341
342 memset(prettyname, 0, sizeof(prettyname));
343 if (rtm->rtm_index < ifmap_size) {
344 strlcpy(prettyname, ifmap[rtm->rtm_index].ifname,
345 sizeof(prettyname));
346 if (*prettyname == '\0')
347 strlcpy(prettyname, "---", sizeof(prettyname));
348 }
349
350 if (Wflag)
351 xo_emit("{t:interface-name/%*s}", wid_if, prettyname);
352 else
353 xo_emit("{t:interface-name/%*.*s}", wid_if, wid_if,
354 prettyname);
355 if (rtm->rtm_rmx.rmx_expire) {
356 time_t expire_time;
357
358 if ((expire_time = rtm->rtm_rmx.rmx_expire - uptime.tv_sec) > 0)
359 xo_emit(" {:expire-time/%*d}", wid_expire,
360 (int)expire_time);
361 }
362
363 xo_emit("\n");
364 xo_close_instance(name);
365 }
366
367 int
p_sockaddr(const char * name,struct sockaddr * sa,struct sockaddr * mask,int flags,int width)368 p_sockaddr(const char *name, struct sockaddr *sa, struct sockaddr *mask,
369 int flags, int width)
370 {
371 const char *cp;
372 char buf[128];
373 int protrusion;
374
375 cp = fmt_sockaddr(sa, mask, flags);
376
377 if (width < 0) {
378 snprintf(buf, sizeof(buf), "{:%s/%%s} ", name);
379 xo_emit(buf, cp);
380 protrusion = 0;
381 } else {
382 if (Wflag != 0 || numeric_addr) {
383 snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%s}{]:} ",
384 -width, name);
385 xo_emit(buf, cp);
386 protrusion = strlen(cp) - width;
387 if (protrusion < 0)
388 protrusion = 0;
389 } else {
390 snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%-.*s}{]:} ",
391 -width, name);
392 xo_emit(buf, width, cp);
393 protrusion = 0;
394 }
395 }
396 return (protrusion);
397 }
398
399 const char *
fmt_sockaddr(struct sockaddr * sa,struct sockaddr * mask,int flags)400 fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
401 {
402 static char buf[128];
403 const char *cp;
404
405 if (sa == NULL)
406 return ("null");
407
408 switch(sa->sa_family) {
409 #ifdef INET6
410 case AF_INET6:
411 /*
412 * The sa6->sin6_scope_id must be filled here because
413 * this sockaddr is extracted from kmem(4) directly
414 * and has KAME-specific embedded scope id in
415 * sa6->sin6_addr.s6_addr[2].
416 */
417 in6_fillscopeid(satosin6(sa));
418 /* FALLTHROUGH */
419 #endif /*INET6*/
420 case AF_INET:
421 if (flags & RTF_HOST)
422 cp = routename(sa, numeric_addr);
423 else if (mask)
424 cp = netname(sa, mask);
425 else
426 cp = netname(sa, NULL);
427 break;
428 case AF_NETGRAPH:
429 {
430 strlcpy(buf, ((struct sockaddr_ng *)sa)->sg_data,
431 sizeof(buf));
432 cp = buf;
433 break;
434 }
435 case AF_LINK:
436 {
437 #if 0
438 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
439
440 /* Interface route. */
441 if (sdl->sdl_nlen)
442 cp = sdl->sdl_data;
443 else
444 #endif
445 cp = routename(sa, 1);
446 break;
447 }
448 default:
449 {
450 u_char *s = (u_char *)sa->sa_data, *slim;
451 char *cq, *cqlim;
452
453 cq = buf;
454 slim = sa->sa_len + (u_char *) sa;
455 cqlim = cq + sizeof(buf) - sizeof(" ffff");
456 snprintf(cq, sizeof(buf), "(%d)", sa->sa_family);
457 cq += strlen(cq);
458 while (s < slim && cq < cqlim) {
459 snprintf(cq, sizeof(" ff"), " %02x", *s++);
460 cq += strlen(cq);
461 if (s < slim) {
462 snprintf(cq, sizeof("ff"), "%02x", *s++);
463 cq += strlen(cq);
464 }
465 }
466 cp = buf;
467 }
468 }
469
470 return (cp);
471 }
472
473 static void
p_flags(int f,const char * format)474 p_flags(int f, const char *format)
475 {
476
477 print_flags_generic(f, rt_bits, format, "flags_pretty");
478 }
479
480
481 char *
routename(struct sockaddr * sa,int flags)482 routename(struct sockaddr *sa, int flags)
483 {
484 static char line[NI_MAXHOST];
485 int error, f;
486
487 f = (flags) ? NI_NUMERICHOST : 0;
488 error = getnameinfo(sa, sa->sa_len, line, sizeof(line),
489 NULL, 0, f);
490 if (error) {
491 const void *src;
492 switch (sa->sa_family) {
493 #ifdef INET
494 case AF_INET:
495 src = &satosin(sa)->sin_addr;
496 break;
497 #endif /* INET */
498 #ifdef INET6
499 case AF_INET6:
500 src = &satosin6(sa)->sin6_addr;
501 break;
502 #endif /* INET6 */
503 default:
504 return(line);
505 }
506 inet_ntop(sa->sa_family, src, line, sizeof(line) - 1);
507 return (line);
508 }
509 trimdomain(line, strlen(line));
510
511 return (line);
512 }
513
514 #define NSHIFT(m) ( \
515 (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT : \
516 (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT : \
517 (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT : \
518 0)
519
520 static void
domask(char * dst,size_t buflen,u_long mask)521 domask(char *dst, size_t buflen, u_long mask)
522 {
523 int b, i;
524
525 if (mask == 0) {
526 *dst = '\0';
527 return;
528 }
529 i = 0;
530 for (b = 0; b < 32; b++)
531 if (mask & (1 << b)) {
532 int bb;
533
534 i = b;
535 for (bb = b+1; bb < 32; bb++)
536 if (!(mask & (1 << bb))) {
537 i = -1; /* noncontig */
538 break;
539 }
540 break;
541 }
542 if (i == -1)
543 snprintf(dst, buflen, "&0x%lx", mask);
544 else
545 snprintf(dst, buflen, "/%d", 32-i);
546 }
547
548 /*
549 * Return the name of the network whose address is given.
550 */
551 const char *
netname(struct sockaddr * sa,struct sockaddr * mask)552 netname(struct sockaddr *sa, struct sockaddr *mask)
553 {
554 switch (sa->sa_family) {
555 case AF_INET:
556 if (mask != NULL)
557 return (netname4(satosin(sa)->sin_addr.s_addr,
558 satosin(mask)->sin_addr.s_addr));
559 else
560 return (netname4(satosin(sa)->sin_addr.s_addr,
561 INADDR_ANY));
562 break;
563 #ifdef INET6
564 case AF_INET6:
565 return (netname6(satosin6(sa), satosin6(mask)));
566 #endif /* INET6 */
567 default:
568 return (NULL);
569 }
570 }
571
572 static const char *
netname4(in_addr_t in,in_addr_t mask)573 netname4(in_addr_t in, in_addr_t mask)
574 {
575 char *cp = 0;
576 static char line[MAXHOSTNAMELEN + sizeof("&0xffffffff")];
577 char nline[INET_ADDRSTRLEN];
578 struct netent *np = 0;
579 in_addr_t i;
580
581 if (in == INADDR_ANY && mask == 0) {
582 strlcpy(line, "default", sizeof(line));
583 return (line);
584 }
585
586 /* It is ok to supply host address. */
587 in &= mask;
588
589 i = ntohl(in);
590 if (!numeric_addr && i) {
591 np = getnetbyaddr(i >> NSHIFT(ntohl(mask)), AF_INET);
592 if (np != NULL) {
593 cp = np->n_name;
594 trimdomain(cp, strlen(cp));
595 }
596 }
597 if (cp != NULL)
598 strlcpy(line, cp, sizeof(line));
599 else {
600 inet_ntop(AF_INET, &in, nline, sizeof(nline));
601 strlcpy(line, nline, sizeof(line));
602 domask(line + strlen(line), sizeof(line) - strlen(line), ntohl(mask));
603 }
604
605 return (line);
606 }
607
608 #undef NSHIFT
609
610 #ifdef INET6
611 void
in6_fillscopeid(struct sockaddr_in6 * sa6)612 in6_fillscopeid(struct sockaddr_in6 *sa6)
613 {
614 #if defined(__KAME__)
615 /*
616 * XXX: This is a special workaround for KAME kernels.
617 * sin6_scope_id field of SA should be set in the future.
618 */
619 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) ||
620 IN6_IS_ADDR_MC_NODELOCAL(&sa6->sin6_addr) ||
621 IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr)) {
622 if (sa6->sin6_scope_id == 0)
623 sa6->sin6_scope_id =
624 ntohs(*(u_int16_t *)&sa6->sin6_addr.s6_addr[2]);
625 sa6->sin6_addr.s6_addr[2] = sa6->sin6_addr.s6_addr[3] = 0;
626 }
627 #endif
628 }
629
630 /* Mask to length table. To check an invalid value, (length + 1) is used. */
631 static const u_char masktolen[256] = {
632 [0xff] = 8 + 1,
633 [0xfe] = 7 + 1,
634 [0xfc] = 6 + 1,
635 [0xf8] = 5 + 1,
636 [0xf0] = 4 + 1,
637 [0xe0] = 3 + 1,
638 [0xc0] = 2 + 1,
639 [0x80] = 1 + 1,
640 [0x00] = 0 + 1,
641 };
642
643 static const char *
netname6(struct sockaddr_in6 * sa6,struct sockaddr_in6 * mask)644 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
645 {
646 static char line[NI_MAXHOST + sizeof("/xxx") - 1];
647 struct sockaddr_in6 addr;
648 char nline[NI_MAXHOST];
649 char maskbuf[sizeof("/xxx")];
650 u_char *p, *lim;
651 u_char masklen;
652 int i;
653 bool illegal = false;
654
655 if (mask) {
656 p = (u_char *)&mask->sin6_addr;
657 for (masklen = 0, lim = p + 16; p < lim; p++) {
658 if (masktolen[*p] > 0) {
659 /* -1 is required. */
660 masklen += (masktolen[*p] - 1);
661 } else
662 illegal = true;
663 }
664 if (illegal)
665 xo_error("illegal prefixlen\n");
666
667 memcpy(&addr, sa6, sizeof(addr));
668 for (i = 0; i < 16; ++i)
669 addr.sin6_addr.s6_addr[i] &=
670 mask->sin6_addr.s6_addr[i];
671 sa6 = &addr;
672 }
673 else
674 masklen = 128;
675
676 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
677 return("default");
678
679 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, nline, sizeof(nline),
680 NULL, 0, NI_NUMERICHOST);
681 if (numeric_addr)
682 strlcpy(line, nline, sizeof(line));
683 else
684 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line,
685 sizeof(line), NULL, 0, 0);
686 if (numeric_addr || strcmp(line, nline) == 0) {
687 snprintf(maskbuf, sizeof(maskbuf), "/%d", masklen);
688 strlcat(line, maskbuf, sizeof(line));
689 }
690
691 return (line);
692 }
693 #endif /*INET6*/
694
695 /*
696 * Print routing statistics
697 */
698 void
rt_stats(void)699 rt_stats(void)
700 {
701 struct rtstat rtstat;
702 u_long rtsaddr;
703
704 if ((rtsaddr = nl[N_RTSTAT].n_value) == 0) {
705 xo_emit("{W:rtstat: symbol not in namelist}\n");
706 return;
707 }
708 kread_counters(rtsaddr, (char *)&rtstat, sizeof (rtstat));
709 xo_emit("{T:routing}:\n");
710
711 #define p(f, m) if (rtstat.f || sflag <= 1) \
712 xo_emit(m, rtstat.f, plural(rtstat.f))
713
714 p(rts_badredirect, "\t{:bad-redirects/%ju} "
715 "{N:/bad routing redirect%s}\n");
716 p(rts_dynamic, "\t{:dynamically-created/%ju} "
717 "{N:/dynamically created route%s}\n");
718 p(rts_newgateway, "\t{:new-gateways/%ju} "
719 "{N:/new gateway%s due to redirects}\n");
720 p(rts_unreach, "\t{:unreachable-destination/%ju} "
721 "{N:/destination%s found unreachable}\n");
722 p(rts_wildcard, "\t{:wildcard-uses/%ju} "
723 "{N:/use%s of a wildcard route}\n");
724 #undef p
725 }
726