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 #include <sys/param.h>
33 #include <sys/protosw.h>
34 #include <sys/socket.h>
35 #include <sys/socketvar.h>
36 #include <sys/sysctl.h>
37 #include <sys/time.h>
38
39 #include <net/ethernet.h>
40 #include <net/if.h>
41 #include <net/if_dl.h>
42 #include <net/if_types.h>
43 #include <net/route.h>
44
45 #include <netinet/in.h>
46 #include <netgraph/ng_socket.h>
47
48 #include <arpa/inet.h>
49 #include <ifaddrs.h>
50 #include <libutil.h>
51 #include <netdb.h>
52 #include <stdbool.h>
53 #include <stdint.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <stdbool.h>
57 #include <string.h>
58 #include <sysexits.h>
59 #include <unistd.h>
60 #include <libxo/xo.h>
61 #include "netstat.h"
62 #include "common.h"
63 #include "nl_defs.h"
64
65 /*
66 * Definitions for showing gateway flags.
67 */
68 struct bits rt_bits[] = {
69 { RTF_UP, 'U', "up" },
70 { RTF_GATEWAY, 'G', "gateway" },
71 { RTF_HOST, 'H', "host" },
72 { RTF_REJECT, 'R', "reject" },
73 { RTF_DYNAMIC, 'D', "dynamic" },
74 { RTF_MODIFIED, 'M', "modified" },
75 { RTF_DONE, 'd', "done" }, /* Completed -- for routing msgs only */
76 { RTF_XRESOLVE, 'X', "xresolve" },
77 { RTF_STATIC, 'S', "static" },
78 { RTF_PROTO1, '1', "proto1" },
79 { RTF_PROTO2, '2', "proto2" },
80 { RTF_PROTO3, '3', "proto3" },
81 { RTF_BLACKHOLE,'B', "blackhole" },
82 { RTF_BROADCAST,'b', "broadcast" },
83 #ifdef RTF_LLINFO
84 { RTF_LLINFO, 'L', "llinfo" },
85 #endif
86 { 0 , 0, NULL }
87 };
88
89 #ifdef WITHOUT_NETLINK
90 static struct ifmap_entry *ifmap;
91 static size_t ifmap_size;
92 #endif
93 static struct timespec uptime;
94
95 static const char *netname4(in_addr_t, in_addr_t);
96 #ifdef INET6
97 static const char *netname6(struct sockaddr_in6 *, struct sockaddr_in6 *);
98 #endif
99 #ifdef WITHOUT_NETLINK
100 static void p_rtable_sysctl(int, int);
101 static void p_rtentry_sysctl(const char *name, struct rt_msghdr *);
102 #endif
103 static void domask(char *, size_t, u_long);
104
105 const uint32_t rt_default_weight = RT_DEFAULT_WEIGHT;
106
107 /*
108 * Print routing tables.
109 */
110 void
routepr(int fibnum,int af)111 routepr(int fibnum, int af)
112 {
113 size_t intsize;
114 int numfibs;
115
116 if (live == 0)
117 return;
118
119 intsize = sizeof(int);
120 if (fibnum == -1 &&
121 sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1)
122 fibnum = 0;
123 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
124 numfibs = 1;
125 if (fibnum < 0 || fibnum > numfibs - 1)
126 xo_errx(EX_USAGE, "%d: invalid fib", fibnum);
127 /*
128 * Since kernel & userland use different timebase
129 * (time_uptime vs time_second) and we are reading kernel memory
130 * directly we should do rt_expire --> expire_time conversion.
131 */
132 if (clock_gettime(CLOCK_UPTIME, &uptime) < 0)
133 xo_err(EX_OSERR, "clock_gettime() failed");
134
135 xo_open_container("route-information");
136 xo_emit("{T:Routing tables}");
137 if (fibnum)
138 xo_emit(" ({L:fib}: {:fib/%d})", fibnum);
139 xo_emit("\n");
140 #ifdef WITHOUT_NETLINK
141 p_rtable_sysctl(fibnum, af);
142 #else
143 p_rtable_netlink(fibnum, af);
144 #endif
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 struct _wid wid;
198
199 /*
200 * Print header for routing table columns.
201 */
202 void
pr_rthdr(int af1 __unused)203 pr_rthdr(int af1 __unused)
204 {
205
206 if (Wflag) {
207 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
208 "{T:/%*.*s} {T:/%*.*s} {T:/%*s}\n",
209 wid.dst, wid.dst, "Destination",
210 wid.gw, wid.gw, "Gateway",
211 wid.flags, wid.flags, "Flags",
212 wid.mtu, wid.mtu, "Nhop#",
213 wid.mtu, wid.mtu, "Mtu",
214 wid.iface, wid.iface, "Netif",
215 wid.expire, "Expire");
216 } else {
217 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
218 "{T:/%*s}\n",
219 wid.dst, wid.dst, "Destination",
220 wid.gw, wid.gw, "Gateway",
221 wid.flags, wid.flags, "Flags",
222 wid.iface, wid.iface, "Netif",
223 wid.expire, "Expire");
224 }
225 }
226
227 void
set_wid(int fam)228 set_wid(int fam)
229 {
230 wid.dst = WID_DST_DEFAULT(fam);
231 wid.gw = WID_GW_DEFAULT(fam);
232 wid.flags = 6;
233 wid.pksent = 8;
234 wid.mtu = 6;
235 wid.iface = WID_IF_DEFAULT;
236 wid.expire = 6;
237 }
238
239 #ifdef WITHOUT_NETLINK
240 static void
p_rtable_sysctl(int fibnum,int af)241 p_rtable_sysctl(int fibnum, int af)
242 {
243 size_t needed;
244 int mib[7];
245 char *buf, *next, *lim;
246 struct rt_msghdr *rtm;
247 struct sockaddr *sa;
248 int fam = AF_UNSPEC;
249 int need_table_close = false;
250
251 ifmap = prepare_ifmap(&ifmap_size);
252
253 mib[0] = CTL_NET;
254 mib[1] = PF_ROUTE;
255 mib[2] = 0;
256 mib[3] = af;
257 mib[4] = NET_RT_DUMP;
258 mib[5] = 0;
259 mib[6] = fibnum;
260 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
261 xo_err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d estimate", af,
262 fibnum);
263 if ((buf = malloc(needed)) == NULL)
264 xo_errx(EX_OSERR, "malloc(%lu)", (unsigned long)needed);
265 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0)
266 xo_err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d", af, fibnum);
267 lim = buf + needed;
268 xo_open_container("route-table");
269 xo_open_list("rt-family");
270 for (next = buf; next < lim; next += rtm->rtm_msglen) {
271 rtm = (struct rt_msghdr *)next;
272 if (rtm->rtm_version != RTM_VERSION)
273 continue;
274 /*
275 * Peek inside header to determine AF
276 */
277 sa = (struct sockaddr *)(rtm + 1);
278 /* Only print family first time. */
279 if (fam != sa->sa_family) {
280 if (need_table_close) {
281 xo_close_list("rt-entry");
282 xo_close_instance("rt-family");
283 }
284 need_table_close = true;
285 fam = sa->sa_family;
286 set_wid(fam);
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.iface, prettyname);
351 else
352 xo_emit("{t:interface-name/%*.*s}", wid.iface, wid.iface,
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 #endif
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 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 (!numeric_addr && 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 (!numeric_addr && masklen == 0 &&
677 IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
678 return("default");
679
680 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, nline, sizeof(nline),
681 NULL, 0, NI_NUMERICHOST);
682 if (numeric_addr)
683 strlcpy(line, nline, sizeof(line));
684 else
685 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line,
686 sizeof(line), NULL, 0, 0);
687 if (numeric_addr || strcmp(line, nline) == 0) {
688 snprintf(maskbuf, sizeof(maskbuf), "/%d", masklen);
689 strlcat(line, maskbuf, sizeof(line));
690 }
691
692 return (line);
693 }
694 #endif /*INET6*/
695
696 /*
697 * Print routing statistics
698 */
699 void
rt_stats(void)700 rt_stats(void)
701 {
702 struct rtstat rtstat;
703
704 if (fetch_stats("net.route.stats", nl[N_RTSTAT].n_value, &rtstat,
705 sizeof(rtstat), kread_counters) != 0)
706 return;
707
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