1 /*-
2 * Copyright (c) 1983, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #if 0
31 #ifndef lint
32 static char sccsid[] = "From: @(#)route.c 8.6 (Berkeley) 4/28/95";
33 #endif /* not lint */
34 #endif
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38
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 <stdint.h>
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <stdbool.h>
63 #include <string.h>
64 #include <sysexits.h>
65 #include <unistd.h>
66 #include <err.h>
67 #include <libxo/xo.h>
68 #include "netstat.h"
69 #include "nl_defs.h"
70
71 /*
72 * Definitions for showing gateway flags.
73 */
74 static struct bits {
75 u_long b_mask;
76 char b_val;
77 const char *b_name;
78 } 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 struct ifmap_entry {
100 char ifname[IFNAMSIZ];
101 };
102 static struct ifmap_entry *ifmap;
103 static int ifmap_size;
104 static struct timespec uptime;
105
106 static const char *netname4(in_addr_t, in_addr_t);
107 static const char *netname6(struct sockaddr_in6 *, struct sockaddr_in6 *);
108 static void p_rtable_sysctl(int, int);
109 static void p_rtentry_sysctl(const char *name, struct rt_msghdr *);
110 static int p_sockaddr(const char *name, struct sockaddr *, struct sockaddr *,
111 int, int);
112 static const char *fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask,
113 int flags);
114 static void p_flags(int, const char *);
115 static const char *fmt_flags(int f);
116 static void domask(char *, in_addr_t, u_long);
117
118
119 /*
120 * Print routing tables.
121 */
122 void
routepr(int fibnum,int af)123 routepr(int fibnum, int af)
124 {
125 size_t intsize;
126 int numfibs;
127
128 if (live == 0)
129 return;
130
131 intsize = sizeof(int);
132 if (fibnum == -1 &&
133 sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1)
134 fibnum = 0;
135 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
136 numfibs = 1;
137 if (fibnum < 0 || fibnum > numfibs - 1)
138 errx(EX_USAGE, "%d: invalid fib", fibnum);
139 /*
140 * Since kernel & userland use different timebase
141 * (time_uptime vs time_second) and we are reading kernel memory
142 * directly we should do rt_expire --> expire_time conversion.
143 */
144 if (clock_gettime(CLOCK_UPTIME, &uptime) < 0)
145 err(EX_OSERR, "clock_gettime() failed");
146
147 xo_open_container("route-information");
148 xo_emit("{T:Routing tables}");
149 if (fibnum)
150 xo_emit(" ({L:fib}: {:fib/%d})", fibnum);
151 xo_emit("\n");
152 p_rtable_sysctl(fibnum, af);
153 xo_close_container("route-information");
154 }
155
156
157 /*
158 * Print address family header before a section of the routing table.
159 */
160 void
pr_family(int af1)161 pr_family(int af1)
162 {
163 const char *afname;
164
165 switch (af1) {
166 case AF_INET:
167 afname = "Internet";
168 break;
169 #ifdef INET6
170 case AF_INET6:
171 afname = "Internet6";
172 break;
173 #endif /*INET6*/
174 case AF_ISO:
175 afname = "ISO";
176 break;
177 case AF_CCITT:
178 afname = "X.25";
179 break;
180 case AF_NETGRAPH:
181 afname = "Netgraph";
182 break;
183 default:
184 afname = NULL;
185 break;
186 }
187 if (afname)
188 xo_emit("\n{k:address-family/%s}:\n", afname);
189 else
190 xo_emit("\n{L:Protocol Family} {k:address-family/%d}:\n", af1);
191 }
192
193 /* column widths; each followed by one space */
194 #ifndef INET6
195 #define WID_DST_DEFAULT(af) 18 /* width of destination column */
196 #define WID_GW_DEFAULT(af) 18 /* width of gateway column */
197 #define WID_IF_DEFAULT(af) (Wflag ? 10 : 8) /* width of netif column */
198 #else
199 #define WID_DST_DEFAULT(af) \
200 ((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
201 #define WID_GW_DEFAULT(af) \
202 ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
203 #define WID_IF_DEFAULT(af) ((af) == AF_INET6 ? 8 : (Wflag ? 10 : 8))
204 #endif /*INET6*/
205
206 static int wid_dst;
207 static int wid_gw;
208 static int wid_flags;
209 static int wid_pksent;
210 static int wid_mtu;
211 static int wid_if;
212 static int wid_expire;
213
214 /*
215 * Print header for routing table columns.
216 */
217 static void
pr_rthdr(int af1 __unused)218 pr_rthdr(int af1 __unused)
219 {
220
221 if (Wflag) {
222 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
223 "{T:/%*.*s} {T:/%*.*s} {T:/%*s}\n",
224 wid_dst, wid_dst, "Destination",
225 wid_gw, wid_gw, "Gateway",
226 wid_flags, wid_flags, "Flags",
227 wid_pksent, wid_pksent, "Use",
228 wid_mtu, wid_mtu, "Mtu",
229 wid_if, wid_if, "Netif",
230 wid_expire, "Expire");
231 } else {
232 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
233 "{T:/%*s}\n",
234 wid_dst, wid_dst, "Destination",
235 wid_gw, wid_gw, "Gateway",
236 wid_flags, wid_flags, "Flags",
237 wid_if, wid_if, "Netif",
238 wid_expire, "Expire");
239 }
240 }
241
242 static void
p_rtable_sysctl(int fibnum,int af)243 p_rtable_sysctl(int fibnum, int af)
244 {
245 size_t needed;
246 int mib[7];
247 char *buf, *next, *lim;
248 struct rt_msghdr *rtm;
249 struct sockaddr *sa;
250 int fam = AF_UNSPEC, ifindex = 0, size;
251 int need_table_close = false;
252
253 struct ifaddrs *ifap, *ifa;
254 struct sockaddr_dl *sdl;
255
256 /*
257 * Retrieve interface list at first
258 * since we need #ifindex -> if_xname match
259 */
260 if (getifaddrs(&ifap) != 0)
261 err(EX_OSERR, "getifaddrs");
262
263 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
264
265 if (ifa->ifa_addr->sa_family != AF_LINK)
266 continue;
267
268 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
269 ifindex = sdl->sdl_index;
270
271 if (ifindex >= ifmap_size) {
272 size = roundup(ifindex + 1, 32) *
273 sizeof(struct ifmap_entry);
274 if ((ifmap = realloc(ifmap, size)) == NULL)
275 errx(2, "realloc(%d) failed", size);
276 memset(&ifmap[ifmap_size], 0,
277 size - ifmap_size *
278 sizeof(struct ifmap_entry));
279
280 ifmap_size = roundup(ifindex + 1, 32);
281 }
282
283 if (*ifmap[ifindex].ifname != '\0')
284 continue;
285
286 strlcpy(ifmap[ifindex].ifname, ifa->ifa_name, IFNAMSIZ);
287 }
288
289 freeifaddrs(ifap);
290
291 mib[0] = CTL_NET;
292 mib[1] = PF_ROUTE;
293 mib[2] = 0;
294 mib[3] = af;
295 mib[4] = NET_RT_DUMP;
296 mib[5] = 0;
297 mib[6] = fibnum;
298 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
299 err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d estimate", af,
300 fibnum);
301 if ((buf = malloc(needed)) == NULL)
302 errx(2, "malloc(%lu)", (unsigned long)needed);
303 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0)
304 err(1, "sysctl: net.route.0.%d.dump.%d", af, fibnum);
305 lim = buf + needed;
306 xo_open_container("route-table");
307 xo_open_list("rt-family");
308 for (next = buf; next < lim; next += rtm->rtm_msglen) {
309 rtm = (struct rt_msghdr *)next;
310 if (rtm->rtm_version != RTM_VERSION)
311 continue;
312 /*
313 * Peek inside header to determine AF
314 */
315 sa = (struct sockaddr *)(rtm + 1);
316 /* Only print family first time. */
317 if (fam != sa->sa_family) {
318 if (need_table_close) {
319 xo_close_list("rt-entry");
320 xo_close_instance("rt-family");
321 }
322 need_table_close = true;
323
324 fam = sa->sa_family;
325 wid_dst = WID_DST_DEFAULT(fam);
326 wid_gw = WID_GW_DEFAULT(fam);
327 wid_flags = 6;
328 wid_pksent = 8;
329 wid_mtu = 6;
330 wid_if = WID_IF_DEFAULT(fam);
331 wid_expire = 6;
332 xo_open_instance("rt-family");
333 pr_family(fam);
334 xo_open_list("rt-entry");
335
336 pr_rthdr(fam);
337 }
338 p_rtentry_sysctl("rt-entry", rtm);
339 }
340 if (need_table_close) {
341 xo_close_list("rt-entry");
342 xo_close_instance("rt-family");
343 }
344 xo_close_list("rt-family");
345 xo_close_container("route-table");
346 free(buf);
347 }
348
349 static void
p_rtentry_sysctl(const char * name,struct rt_msghdr * rtm)350 p_rtentry_sysctl(const char *name, struct rt_msghdr *rtm)
351 {
352 struct sockaddr *sa, *addr[RTAX_MAX];
353 char buffer[128];
354 char prettyname[128];
355 int i, protrusion;
356
357 xo_open_instance(name);
358 sa = (struct sockaddr *)(rtm + 1);
359 for (i = 0; i < RTAX_MAX; i++) {
360 if (rtm->rtm_addrs & (1 << i))
361 addr[i] = sa;
362 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa));
363 }
364
365 protrusion = p_sockaddr("destination", addr[RTAX_DST],
366 addr[RTAX_NETMASK],
367 rtm->rtm_flags, wid_dst);
368 protrusion = p_sockaddr("gateway", addr[RTAX_GATEWAY], NULL, RTF_HOST,
369 wid_gw - protrusion);
370 snprintf(buffer, sizeof(buffer), "{[:-%d}{:flags/%%s}{]:} ",
371 wid_flags - protrusion);
372 p_flags(rtm->rtm_flags, buffer);
373 if (Wflag) {
374 xo_emit("{t:use/%*lu} ", wid_pksent, rtm->rtm_rmx.rmx_pksent);
375
376 if (rtm->rtm_rmx.rmx_mtu != 0)
377 xo_emit("{t:mtu/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_mtu);
378 else
379 xo_emit("{P:/%*s} ", wid_mtu, "");
380 }
381
382 memset(prettyname, 0, sizeof(prettyname));
383 if (rtm->rtm_index < ifmap_size) {
384 strlcpy(prettyname, ifmap[rtm->rtm_index].ifname,
385 sizeof(prettyname));
386 if (*prettyname == '\0')
387 strlcpy(prettyname, "---", sizeof(prettyname));
388 }
389
390 if (Wflag)
391 xo_emit("{t:interface-name/%*s}", wid_if, prettyname);
392 else
393 xo_emit("{t:interface-name/%*.*s}", wid_if, wid_if,
394 prettyname);
395 if (rtm->rtm_rmx.rmx_expire) {
396 time_t expire_time;
397
398 if ((expire_time = rtm->rtm_rmx.rmx_expire - uptime.tv_sec) > 0)
399 xo_emit(" {:expire-time/%*d}", wid_expire,
400 (int)expire_time);
401 }
402
403 xo_emit("\n");
404 xo_close_instance(name);
405 }
406
407 static int
p_sockaddr(const char * name,struct sockaddr * sa,struct sockaddr * mask,int flags,int width)408 p_sockaddr(const char *name, struct sockaddr *sa, struct sockaddr *mask,
409 int flags, int width)
410 {
411 const char *cp;
412 char buf[128];
413 int protrusion;
414
415 cp = fmt_sockaddr(sa, mask, flags);
416
417 if (width < 0) {
418 snprintf(buf, sizeof(buf), "{:%s/%%s} ", name);
419 xo_emit(buf, cp);
420 } else {
421 if (Wflag != 0 || numeric_addr) {
422 snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%s}{]:} ",
423 -width, name);
424 xo_emit(buf, cp);
425 protrusion = strlen(cp) - width;
426 if (protrusion < 0)
427 protrusion = 0;
428 } else {
429 snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%-.*s}{]:} ",
430 -width, name);
431 xo_emit(buf, width, cp);
432 protrusion = 0;
433 }
434 }
435 return (protrusion);
436 }
437
438 static const char *
fmt_sockaddr(struct sockaddr * sa,struct sockaddr * mask,int flags)439 fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
440 {
441 static char buf[128];
442 const char *cp;
443
444 if (sa == NULL)
445 return ("null");
446
447 switch(sa->sa_family) {
448 #ifdef INET6
449 case AF_INET6:
450 /*
451 * The sa6->sin6_scope_id must be filled here because
452 * this sockaddr is extracted from kmem(4) directly
453 * and has KAME-specific embedded scope id in
454 * sa6->sin6_addr.s6_addr[2].
455 */
456 in6_fillscopeid(satosin6(sa));
457 /* FALLTHROUGH */
458 #endif /*INET6*/
459 case AF_INET:
460 if (flags & RTF_HOST)
461 cp = routename(sa, numeric_addr);
462 else if (mask)
463 cp = netname(sa, mask);
464 else
465 cp = netname(sa, NULL);
466 break;
467 case AF_NETGRAPH:
468 {
469 strlcpy(buf, ((struct sockaddr_ng *)sa)->sg_data,
470 sizeof(buf));
471 cp = buf;
472 break;
473 }
474 case AF_LINK:
475 {
476 #if 0
477 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
478
479 /* Interface route. */
480 if (sdl->sdl_nlen)
481 cp = sdl->sdl_data;
482 else
483 #endif
484 cp = routename(sa, 1);
485 break;
486 }
487 default:
488 {
489 u_char *s = (u_char *)sa->sa_data, *slim;
490 char *cq, *cqlim;
491
492 cq = buf;
493 slim = sa->sa_len + (u_char *) sa;
494 cqlim = cq + sizeof(buf) - 6;
495 cq += sprintf(cq, "(%d)", sa->sa_family);
496 while (s < slim && cq < cqlim) {
497 cq += sprintf(cq, " %02x", *s++);
498 if (s < slim)
499 cq += sprintf(cq, "%02x", *s++);
500 }
501 cp = buf;
502 }
503 }
504
505 return (cp);
506 }
507
508 static void
p_flags(int f,const char * format)509 p_flags(int f, const char *format)
510 {
511 struct bits *p;
512
513 xo_emit(format, fmt_flags(f));
514
515 xo_open_list("flags_pretty");
516 for (p = bits; p->b_mask; p++)
517 if (p->b_mask & f)
518 xo_emit("{le:flags_pretty/%s}", p->b_name);
519 xo_close_list("flags_pretty");
520 }
521
522 static const char *
fmt_flags(int f)523 fmt_flags(int f)
524 {
525 static char name[33];
526 char *flags;
527 struct bits *p = bits;
528
529 for (flags = name; p->b_mask; p++)
530 if (p->b_mask & f)
531 *flags++ = p->b_val;
532 *flags = '\0';
533 return (name);
534 }
535
536 char *
routename(struct sockaddr * sa,int flags)537 routename(struct sockaddr *sa, int flags)
538 {
539 static char line[NI_MAXHOST];
540 int error, f;
541
542 f = (flags) ? NI_NUMERICHOST : 0;
543 error = getnameinfo(sa, sa->sa_len, line, sizeof(line),
544 NULL, 0, f);
545 if (error) {
546 const void *src;
547 switch (sa->sa_family) {
548 #ifdef INET
549 case AF_INET:
550 src = &satosin(sa)->sin_addr;
551 break;
552 #endif /* INET */
553 #ifdef INET6
554 case AF_INET6:
555 src = &satosin6(sa)->sin6_addr;
556 break;
557 #endif /* INET6 */
558 default:
559 return(line);
560 }
561 inet_ntop(sa->sa_family, src, line, sizeof(line) - 1);
562 return (line);
563 }
564 trimdomain(line, strlen(line));
565
566 return (line);
567 }
568
569 #define NSHIFT(m) ( \
570 (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT : \
571 (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT : \
572 (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT : \
573 0)
574
575 static void
domask(char * dst,in_addr_t addr __unused,u_long mask)576 domask(char *dst, in_addr_t addr __unused, u_long mask)
577 {
578 int b, i;
579
580 if (mask == 0) {
581 *dst = '\0';
582 return;
583 }
584 i = 0;
585 for (b = 0; b < 32; b++)
586 if (mask & (1 << b)) {
587 int bb;
588
589 i = b;
590 for (bb = b+1; bb < 32; bb++)
591 if (!(mask & (1 << bb))) {
592 i = -1; /* noncontig */
593 break;
594 }
595 break;
596 }
597 if (i == -1)
598 sprintf(dst, "&0x%lx", mask);
599 else
600 sprintf(dst, "/%d", 32-i);
601 }
602
603 /*
604 * Return the name of the network whose address is given.
605 */
606 const char *
netname(struct sockaddr * sa,struct sockaddr * mask)607 netname(struct sockaddr *sa, struct sockaddr *mask)
608 {
609 switch (sa->sa_family) {
610 case AF_INET:
611 if (mask != NULL)
612 return (netname4(satosin(sa)->sin_addr.s_addr,
613 satosin(mask)->sin_addr.s_addr));
614 else
615 return (netname4(satosin(sa)->sin_addr.s_addr,
616 INADDR_ANY));
617 break;
618 #ifdef INET6
619 case AF_INET6:
620 return (netname6(satosin6(sa), satosin6(mask)));
621 #endif /* INET6 */
622 default:
623 return (NULL);
624 }
625 }
626
627 static const char *
netname4(in_addr_t in,in_addr_t mask)628 netname4(in_addr_t in, in_addr_t mask)
629 {
630 char *cp = 0;
631 static char line[MAXHOSTNAMELEN + sizeof("/xx")];
632 char nline[INET_ADDRSTRLEN];
633 struct netent *np = 0;
634 in_addr_t i;
635
636 if (in == INADDR_ANY && mask == 0) {
637 strlcpy(line, "default", sizeof(line));
638 return (line);
639 }
640
641 /* It is ok to supply host address. */
642 in &= mask;
643
644 i = ntohl(in);
645 if (!numeric_addr && i) {
646 np = getnetbyaddr(i >> NSHIFT(ntohl(mask)), AF_INET);
647 if (np != NULL) {
648 cp = np->n_name;
649 trimdomain(cp, strlen(cp));
650 }
651 }
652 if (cp != NULL)
653 strlcpy(line, cp, sizeof(line));
654 else {
655 inet_ntop(AF_INET, &in, nline, sizeof(nline));
656 strlcpy(line, nline, sizeof(line));
657 domask(line + strlen(line), i, ntohl(mask));
658 }
659
660 return (line);
661 }
662
663 #undef NSHIFT
664
665 #ifdef INET6
666 void
in6_fillscopeid(struct sockaddr_in6 * sa6)667 in6_fillscopeid(struct sockaddr_in6 *sa6)
668 {
669 #if defined(__KAME__)
670 /*
671 * XXX: This is a special workaround for KAME kernels.
672 * sin6_scope_id field of SA should be set in the future.
673 */
674 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) ||
675 IN6_IS_ADDR_MC_NODELOCAL(&sa6->sin6_addr) ||
676 IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr)) {
677 if (sa6->sin6_scope_id == 0)
678 sa6->sin6_scope_id =
679 ntohs(*(u_int16_t *)&sa6->sin6_addr.s6_addr[2]);
680 sa6->sin6_addr.s6_addr[2] = sa6->sin6_addr.s6_addr[3] = 0;
681 }
682 #endif
683 }
684
685 /* Mask to length table. To check an invalid value, (length + 1) is used. */
686 static int masktolen[256] = {
687 [0xff] = 8 + 1,
688 [0xfe] = 7 + 1,
689 [0xfc] = 6 + 1,
690 [0xf8] = 5 + 1,
691 [0xf0] = 4 + 1,
692 [0xe0] = 3 + 1,
693 [0xc0] = 2 + 1,
694 [0x80] = 1 + 1,
695 [0x00] = 0 + 1,
696 };
697
698 static const char *
netname6(struct sockaddr_in6 * sa6,struct sockaddr_in6 * mask)699 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
700 {
701 static char line[NI_MAXHOST + sizeof("/xxx") - 1];
702 struct sockaddr_in6 addr;
703 char nline[NI_MAXHOST];
704 u_char *p, *lim;
705 int masklen, illegal = 0, i;
706
707 if (mask) {
708 p = (u_char *)&mask->sin6_addr;
709 for (masklen = 0, lim = p + 16; p < lim; p++) {
710 if (masktolen[*p] > 0)
711 /* -1 is required. */
712 masklen += masktolen[*p] - 1;
713 else
714 illegal++;
715 }
716 if (illegal)
717 xo_error("illegal prefixlen\n");
718
719 memcpy(&addr, sa6, sizeof(addr));
720 for (i = 0; i < 16; ++i)
721 addr.sin6_addr.s6_addr[i] &=
722 mask->sin6_addr.s6_addr[i];
723 sa6 = &addr;
724 }
725 else
726 masklen = 128;
727
728 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
729 return("default");
730
731 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, nline, sizeof(nline),
732 NULL, 0, NI_NUMERICHOST);
733 if (numeric_addr)
734 strlcpy(line, nline, sizeof(line));
735 else
736 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line,
737 sizeof(line), NULL, 0, 0);
738 if (numeric_addr || strcmp(line, nline) == 0)
739 sprintf(&line[strlen(line)], "/%d", masklen);
740
741 return (line);
742 }
743 #endif /*INET6*/
744
745 /*
746 * Print routing statistics
747 */
748 void
rt_stats(void)749 rt_stats(void)
750 {
751 struct rtstat rtstat;
752 u_long rtsaddr, rttaddr;
753 int rttrash;
754
755 if ((rtsaddr = nl[N_RTSTAT].n_value) == 0) {
756 xo_emit("{W:rtstat: symbol not in namelist}\n");
757 return;
758 }
759 if ((rttaddr = nl[N_RTTRASH].n_value) == 0) {
760 xo_emit("{W:rttrash: symbol not in namelist}\n");
761 return;
762 }
763 kread(rtsaddr, (char *)&rtstat, sizeof (rtstat));
764 kread(rttaddr, (char *)&rttrash, sizeof (rttrash));
765 xo_emit("{T:routing}:\n");
766
767 #define p(f, m) if (rtstat.f || sflag <= 1) \
768 xo_emit(m, rtstat.f, plural(rtstat.f))
769
770 p(rts_badredirect, "\t{:bad-redirects/%hu} "
771 "{N:/bad routing redirect%s}\n");
772 p(rts_dynamic, "\t{:dynamically-created/%hu} "
773 "{N:/dynamically created route%s}\n");
774 p(rts_newgateway, "\t{:new-gateways/%hu} "
775 "{N:/new gateway%s due to redirects}\n");
776 p(rts_unreach, "\t{:unreachable-destination/%hu} "
777 "{N:/destination%s found unreachable}\n");
778 p(rts_wildcard, "\t{:wildcard-uses/%hu} "
779 "{N:/use%s of a wildcard route}\n");
780 #undef p
781
782 if (rttrash || sflag <= 1)
783 xo_emit("\t{:unused-but-not-freed/%u} "
784 "{N:/route%s not in table but not freed}\n",
785 rttrash, plural(rttrash));
786 }
787