Bug Summary

File:src/usr.sbin/ndp/ndp.c
Warning:line 801, column 7
Although the value stored to 'rlen' is used in the enclosing expression, the value is never actually read from 'rlen'

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name ndp.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/usr.sbin/ndp/obj -resource-dir /usr/local/llvm16/lib/clang/16 -internal-isystem /usr/local/llvm16/lib/clang/16/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.sbin/ndp/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fno-jump-tables -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/scan/2024-01-11-140451-98009-1 -x c /usr/src/usr.sbin/ndp/ndp.c
1/* $OpenBSD: ndp.c,v 1.109 2023/04/05 13:56:41 bluhm Exp $ */
2/* $KAME: ndp.c,v 1.101 2002/07/17 08:46:33 itojun Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
6 * 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 project 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 PROJECT 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 PROJECT 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 * Copyright (c) 1984, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * This code is derived from software contributed to Berkeley by
37 * Sun Microsystems, Inc.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. Neither the name of the University nor the names of its contributors
48 * may be used to endorse or promote products derived from this software
49 * without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * SUCH DAMAGE.
62 */
63
64/*
65 * Based on:
66 * "@(#) Copyright (c) 1984, 1993\n\
67 * The Regents of the University of California. All rights reserved.\n";
68 *
69 * "@(#)arp.c 8.2 (Berkeley) 1/2/94";
70 */
71
72/*
73 * ndp - display, set, delete and flush neighbor cache
74 */
75
76
77#include <sys/ioctl.h>
78#include <sys/socket.h>
79#include <sys/sysctl.h>
80#include <sys/time.h>
81#include <sys/queue.h>
82
83#include <net/if.h>
84#include <net/if_dl.h>
85#include <net/if_types.h>
86#include <net/route.h>
87
88#include <netinet/in.h>
89
90#include <netinet/icmp6.h>
91#include <netinet6/in6_var.h>
92#include <netinet6/nd6.h>
93
94#include <arpa/inet.h>
95
96#include <stdio.h>
97#include <errno(*__errno()).h>
98#include <fcntl.h>
99#include <netdb.h>
100#include <stdlib.h>
101#include <string.h>
102#include <unistd.h>
103#include <limits.h>
104#include <err.h>
105
106/* packing rule for routing socket */
107#define ROUNDUP(a)((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof
(long)) \
108 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
109#define ADVANCE(x, n)(x += (((n)->sa_len) > 0 ? (1 + ((((n)->sa_len) - 1)
| (sizeof(long) - 1))) : sizeof(long))) (x += ROUNDUP((n)->sa_len)(((n)->sa_len) > 0 ? (1 + ((((n)->sa_len) - 1) | (sizeof
(long) - 1))) : sizeof(long)))
110
111static pid_t pid;
112static int nflag;
113static int tflag;
114static int rtsock = -1;
115static int repeat = 0;
116
117char host_buf[NI_MAXHOST256]; /* getnameinfo() */
118char ifix_buf[IFNAMSIZ16]; /* if_indextoname() */
119
120int file(char *);
121void getsocket(void);
122int parse_host(const char *, struct sockaddr_in6 *);
123int set(int, char **);
124void get(const char *);
125int delete(const char *);
126void dump(struct sockaddr_in6 *, int);
127static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
128static char *ether_str(struct sockaddr_dl *);
129int ndp_ether_aton(const char *, u_char *);
130void usage(void);
131int rtmsg(int);
132int rtget(struct sockaddr_in6 **, struct sockaddr_dl **);
133void ifinfo(const char *);
134static char *sec2str(time_t);
135static int rdomain;
136
137int
138main(int argc, char *argv[])
139{
140 int ch, mode = 0, error = 0;
141 char *arg = NULL((void *)0);
142 const char *errstr;
143
144 pid = getpid();
145 rdomain = getrtable();
146 while ((ch = getopt(argc, argv, "acd:f:i:nstA:V:")) != -1) {
147 switch (ch) {
148 case 'a':
149 case 'c':
150 case 'p':
151 case 'r':
152 case 'P':
153 case 's':
154 if (mode) {
155 usage();
156 }
157 mode = ch;
158 arg = NULL((void *)0);
159 break;
160 case 'd':
161 case 'f':
162 case 'i' :
163 if (mode) {
164 usage();
165 }
166 mode = ch;
167 arg = optarg;
168 break;
169 case 'n':
170 nflag = 1;
171 break;
172 case 't':
173 tflag = 1;
174 break;
175 case 'A':
176 if (mode) {
177 usage();
178 }
179 mode = 'a';
180 repeat = strtonum(optarg, 1, INT_MAX0x7fffffff, &errstr);
181 if (errstr) {
182 usage();
183 }
184 break;
185 case 'V':
186 rdomain = strtonum(optarg, 0, RT_TABLEID_MAX255, &errstr);
187 if (errstr != NULL((void *)0)) {
188 warn("bad rdomain: %s", errstr);
189 usage();
190 }
191 break;
192 default:
193 usage();
194 }
195 }
196 argc -= optind;
197 argv += optind;
198
199 switch (mode) {
200 case 'a':
201 case 'c':
202 if (argc != 0) {
203 usage();
204 }
205 dump(NULL((void *)0), mode == 'c');
206 break;
207 case 'd':
208 if (argc != 0) {
209 usage();
210 }
211 error = delete(arg);
212 break;
213 case 'f':
214 if (argc != 0)
215 usage();
216 file(arg);
217 break;
218 case 'i':
219 if (argc != 0)
220 usage();
221 ifinfo(arg);
222 break;
223 case 's':
224 if (argc < 2 || argc > 4)
225 usage();
226 exit(set(argc, argv) ? 1 : 0);
227 case 0:
228 if (argc != 1) {
229 usage();
230 }
231 get(argv[0]);
232 break;
233 }
234 return (error);
235}
236
237/*
238 * Process a file to set standard ndp entries
239 */
240int
241file(char *name)
242{
243 FILE *fp;
244 int i, retval;
245 char line[100], arg[5][50], *args[5];
246
247 if ((fp = fopen(name, "r")) == NULL((void *)0)) {
248 err(1, "cannot open %s", name);
249 }
250 args[0] = &arg[0][0];
251 args[1] = &arg[1][0];
252 args[2] = &arg[2][0];
253 args[3] = &arg[3][0];
254 args[4] = &arg[4][0];
255 retval = 0;
256 while (fgets(line, sizeof(line), fp) != NULL((void *)0)) {
257 i = sscanf(line, "%49s %49s %49s %49s %49s",
258 arg[0], arg[1], arg[2], arg[3], arg[4]);
259 if (i < 2) {
260 warnx("bad line: %s", line);
261 retval = 1;
262 continue;
263 }
264 if (set(i, args))
265 retval = 1;
266 }
267 fclose(fp);
268 return (retval);
269}
270
271void
272getsocket(void)
273{
274 socklen_t len = sizeof(rdomain);
275
276 if (rtsock >= 0)
277 return;
278 rtsock = socket(AF_ROUTE17, SOCK_RAW3, 0);
279 if (rtsock == -1)
280 err(1, "routing socket");
281 if (setsockopt(rtsock, AF_ROUTE17, ROUTE_TABLEFILTER2, &rdomain, len) == -1)
282 err(1, "ROUTE_TABLEFILTER");
283
284 if (pledge("stdio dns", NULL((void *)0)) == -1)
285 err(1, "pledge");
286}
287
288int
289parse_host(const char *host, struct sockaddr_in6 *sin6)
290{
291 struct addrinfo hints, *res;
292 int gai_error;
293
294 bzero(&hints, sizeof(hints));
295 hints.ai_family = AF_INET624;
296 if (nflag)
297 hints.ai_flags = AI_NUMERICHOST4;
298
299 gai_error = getaddrinfo(host, NULL((void *)0), &hints, &res);
300 if (gai_error) {
301 warnx("%s: %s", host, gai_strerror(gai_error));
302 return 1;
303 }
304 *sin6 = *(struct sockaddr_in6 *)res->ai_addr;
305 freeaddrinfo(res);
306 return 0;
307}
308
309struct sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET624 };
310struct sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET624 }, sin_m;
311struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK18 }, sdl_m;
312struct sockaddr_dl ifp_m = { sizeof(ifp_m), AF_LINK18 };
313time_t expire_time;
314int flags, found_entry;
315struct {
316 struct rt_msghdr m_rtm;
317 char m_space[512];
318} m_rtmsg;
319
320/*
321 * Set an individual neighbor cache entry
322 */
323int
324set(int argc, char *argv[])
325{
326 struct sockaddr_in6 *sin = &sin_m;
327 struct sockaddr_dl *sdl;
328 struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
329 u_char *ea;
330 const char *host = argv[0], *eaddr = argv[1];
331
332 getsocket();
333 argc -= 2;
334 argv += 2;
335 sdl_m = blank_sdl;
336 sin_m = blank_sin;
337
338 if (parse_host(host, sin))
339 return 1;
340 ea = (u_char *)LLADDR(&sdl_m)((caddr_t)((&sdl_m)->sdl_data + (&sdl_m)->sdl_nlen
));
341 if (ndp_ether_aton(eaddr, ea) == 0)
342 sdl_m.sdl_alen = 6;
343 expire_time = 0;
344 flags = 0;
345 while (argc-- > 0) {
346 if (strncmp(argv[0], "temp", 4) == 0) {
347 struct timeval now;
348
349 gettimeofday(&now, 0);
350 expire_time = now.tv_sec + 20 * 60;
351 } else if (strncmp(argv[0], "proxy", 5) == 0)
352 flags |= RTF_ANNOUNCE0x4000;
353 argv++;
354 }
355
356 if (rtget(&sin, &sdl)) {
357 errx(1, "RTM_GET(%s) failed", host);
358 }
359
360 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)(memcmp(&(&sin->sin6_addr)->__u6_addr.__u6_addr8
[0], &(&sin_m.sin6_addr)->__u6_addr.__u6_addr8[0],
sizeof(struct in6_addr)) == 0) &&
361 sin->sin6_scope_id == sin_m.sin6_scope_id) {
362 if (sdl->sdl_family == AF_LINK18 &&
363 (rtm->rtm_flags & RTF_LLINFO0x400) &&
364 !(rtm->rtm_flags & RTF_GATEWAY0x2)) {
365 switch (sdl->sdl_type) {
366 case IFT_ETHER0x06: case IFT_FDDI0x0f: case IFT_ISO880230x07:
367 case IFT_ISO880240x08: case IFT_ISO880250x09:
368 goto overwrite;
369 }
370 }
371 /*
372 * IPv4 arp command retries with sin_other = SIN_PROXY here.
373 */
374 warnx("set: cannot configure a new entry");
375 return 1;
376 }
377
378overwrite:
379 if (sdl->sdl_family != AF_LINK18) {
380 printf("cannot intuit interface index and type for %s\n", host);
381 return (1);
382 }
383 sdl_m.sdl_type = sdl->sdl_type;
384 sdl_m.sdl_index = sdl->sdl_index;
385 return (rtmsg(RTM_ADD0x1));
386}
387
388/*
389 * Display an individual neighbor cache entry
390 */
391void
392get(const char *host)
393{
394 struct sockaddr_in6 *sin = &sin_m;
395
396 sin_m = blank_sin;
397 if (parse_host(host, sin))
398 return;
399
400 dump(sin, 0);
401 if (found_entry == 0) {
402 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
403 sizeof(host_buf), NULL((void *)0) ,0,
404 (nflag ? NI_NUMERICHOST1 : 0));
405 printf("%s (%s) -- no entry\n", host, host_buf);
406 exit(1);
407 }
408}
409
410/*
411 * Delete a neighbor cache entry
412 */
413int
414delete(const char *host)
415{
416 struct sockaddr_in6 *sin;
417 struct rt_msghdr *rtm;
418 struct sockaddr_dl *sdl;
419
420 sin = &sin_m;
421 rtm = &m_rtmsg.m_rtm;
422
423 getsocket();
424 sin_m = blank_sin; /* struct copy */
425 if (parse_host(host, sin))
426 return 1;
427 if (rtget(&sin, &sdl)) {
428 warn("%s", host);
429 return 1;
430 }
431 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)(memcmp(&(&sin->sin6_addr)->__u6_addr.__u6_addr8
[0], &(&sin_m.sin6_addr)->__u6_addr.__u6_addr8[0],
sizeof(struct in6_addr)) == 0) &&
432 sin->sin6_scope_id == sin_m.sin6_scope_id) {
433 if (sdl->sdl_family == AF_LINK18 && rtm->rtm_flags & RTF_LLINFO0x400) {
434 if (rtm->rtm_flags & RTF_LOCAL0x200000)
435 return 0;
436 if ((rtm->rtm_flags & RTF_GATEWAY0x2) == 0)
437 goto delete;
438 }
439 }
440
441 /*
442 * IPv4 arp command retries with sin_other = SIN_PROXY here.
443 */
444 warnx("delete: cannot locate %s", host);
445 return 1;
446
447delete:
448 if (sdl->sdl_family != AF_LINK18) {
449 printf("cannot locate %s\n", host);
450 return 1;
451 }
452 if (rtmsg(RTM_DELETE0x2))
453 return 1;
454 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
455 sizeof(host_buf), NULL((void *)0), 0, (nflag ? NI_NUMERICHOST1 : 0));
456 printf("%s (%s) deleted\n", host, host_buf);
457 return 0;
458}
459
460/*
461 * strlen("2001:0db8:3333:4444:5555:6666:7777:8888") == 39
462 */
463#define W_ADDR39 39
464#define W_LL17 17
465#define W_IF7 7
466
467/*
468 * Dump the entire neighbor cache
469 */
470void
471dump(struct sockaddr_in6 *addr, int cflag)
472{
473 int mib[7];
474 size_t needed;
475 char *lim, *buf = NULL((void *)0), *next;
476 struct rt_msghdr *rtm;
477 struct sockaddr_in6 *sin;
478 struct sockaddr_dl *sdl;
479 struct in6_nbrinfo *nbi;
480 struct timeval now;
481 int addrwidth;
482 int llwidth;
483 int ifwidth;
484 char *ifname;
485
486 /* Print header */
487 if (!tflag && !cflag)
488 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
489 W_ADDR39, W_ADDR39, "Neighbor", W_LL17, W_LL17, "Linklayer Address",
490 W_IF7, W_IF7, "Netif", "Expire", "S", "Flags");
491
492again:;
493 lim = NULL((void *)0);
494 mib[0] = CTL_NET4;
495 mib[1] = PF_ROUTE17;
496 mib[2] = 0;
497 mib[3] = AF_INET624;
498 mib[4] = NET_RT_FLAGS2;
499 mib[5] = RTF_LLINFO0x400;
500 mib[6] = rdomain;
501 while (1) {
502 if (sysctl(mib, 7, NULL((void *)0), &needed, NULL((void *)0), 0) == -1)
503 err(1, "sysctl(PF_ROUTE estimate)");
504 if (needed == 0)
505 break;
506 if ((buf = realloc(buf, needed)) == NULL((void *)0))
507 err(1, "realloc");
508 if (sysctl(mib, 7, buf, &needed, NULL((void *)0), 0) == -1) {
509 if (errno(*__errno()) == ENOMEM12)
510 continue;
511 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
512 }
513 lim = buf + needed;
514 break;
515 }
516
517 for (next = buf; next && lim && next < lim; next += rtm->rtm_msglen) {
518 int isrouter = 0, prbs = 0;
519
520 rtm = (struct rt_msghdr *)next;
521 if (rtm->rtm_version != RTM_VERSION5)
522 continue;
523 sin = (struct sockaddr_in6 *)(next + rtm->rtm_hdrlen);
524#ifdef __KAME__
525 {
526 struct in6_addr *in6 = &sin->sin6_addr;
527 if ((IN6_IS_ADDR_LINKLOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xfe) && (((in6
)->__u6_addr.__u6_addr8[1] & 0xc0) == 0x80)) ||
528 IN6_IS_ADDR_MC_LINKLOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xff) && (((in6
)->__u6_addr.__u6_addr8[1] & 0x0f) == 0x02)) ||
529 IN6_IS_ADDR_MC_INTFACELOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xff) && (((in6
)->__u6_addr.__u6_addr8[1] & 0x0f) == 0x01))) &&
530 sin->sin6_scope_id == 0) {
531 sin->sin6_scope_id = (u_int32_t)
532 ntohs(*(u_short *)&in6->s6_addr[2])(__uint16_t)(__builtin_constant_p(*(u_short *)&in6->__u6_addr
.__u6_addr8[2]) ? (__uint16_t)(((__uint16_t)(*(u_short *)&
in6->__u6_addr.__u6_addr8[2]) & 0xffU) << 8 | ((
__uint16_t)(*(u_short *)&in6->__u6_addr.__u6_addr8[2])
& 0xff00U) >> 8) : __swap16md(*(u_short *)&in6
->__u6_addr.__u6_addr8[2]));
533 *(u_short *)&in6->s6_addr__u6_addr.__u6_addr8[2] = 0;
534 }
535 }
536#endif
537 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len)((sin->sin6_len) > 0 ? (1 + (((sin->sin6_len) - 1) |
(sizeof(long) - 1))) : sizeof(long)));
538
539 /*
540 * Some OSes can produce a route that has the LINK flag but
541 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
542 * and BSD/OS, where xx is not the interface identifier on
543 * lo0). Such routes entry would annoy getnbrinfo() below,
544 * so we skip them.
545 * XXX: such routes should have the GATEWAY flag, not the
546 * LINK flag. However, there is rotten routing software
547 * that advertises all routes that have the GATEWAY flag.
548 * Thus, KAME kernel intentionally does not set the LINK flag.
549 * What is to be fixed is not ndp, but such routing software
550 * (and the kernel workaround)...
551 */
552 if (sdl->sdl_family != AF_LINK18)
553 continue;
554
555 if (!(rtm->rtm_flags & RTF_HOST0x4))
556 continue;
557
558 if (addr) {
559 if (!IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,(memcmp(&(&addr->sin6_addr)->__u6_addr.__u6_addr8
[0], &(&sin->sin6_addr)->__u6_addr.__u6_addr8[0
], sizeof(struct in6_addr)) == 0)
560 &sin->sin6_addr)(memcmp(&(&addr->sin6_addr)->__u6_addr.__u6_addr8
[0], &(&sin->sin6_addr)->__u6_addr.__u6_addr8[0
], sizeof(struct in6_addr)) == 0) || addr->sin6_scope_id !=
561 sin->sin6_scope_id)
562 continue;
563 found_entry = 1;
564 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)((&sin->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff
))
565 continue;
566 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
567 sizeof(host_buf), NULL((void *)0), 0, (nflag ? NI_NUMERICHOST1 : 0));
568 if (cflag) {
569 if (rtm->rtm_flags & RTF_CLONED0x10000)
570 delete(host_buf);
571 continue;
572 }
573 gettimeofday(&now, 0);
574 if (tflag) {
575 char buf[sizeof("00:00:00")];
576 struct tm *tm;
577
578 tm = localtime(&now.tv_sec);
579 if (tm != NULL((void *)0)) {
580 strftime(buf, sizeof(buf), "%H:%M:%S", tm);
581 printf("%s.%06ld ", buf, now.tv_usec);
582 }
583 }
584
585 addrwidth = strlen(host_buf);
586 if (addrwidth < W_ADDR39)
587 addrwidth = W_ADDR39;
588 llwidth = strlen(ether_str(sdl));
589 if (W_ADDR39 + W_LL17 - addrwidth > llwidth)
590 llwidth = W_ADDR39 + W_LL17 - addrwidth;
591 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
592 if (!ifname)
593 ifname = "?";
594 ifwidth = strlen(ifname);
595 if (W_ADDR39 + W_LL17 + W_IF7 - addrwidth - llwidth > ifwidth)
596 ifwidth = W_ADDR39 + W_LL17 + W_IF7 - addrwidth - llwidth;
597
598 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
599 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
600
601 /* Print neighbor discovery specific information */
602 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
603 if (nbi) {
604 if (nbi->expire > now.tv_sec) {
605 printf(" %-9.9s",
606 sec2str(nbi->expire - now.tv_sec));
607 } else if (nbi->expire == 0)
608 printf(" %-9.9s", "permanent");
609 else
610 printf(" %-9.9s", "expired");
611
612 switch (nbi->state) {
613 case ND6_LLINFO_NOSTATE-2:
614 printf(" N");
615 break;
616 case ND6_LLINFO_INCOMPLETE0:
617 printf(" I");
618 break;
619 case ND6_LLINFO_REACHABLE1:
620 printf(" R");
621 break;
622 case ND6_LLINFO_STALE2:
623 printf(" S");
624 break;
625 case ND6_LLINFO_DELAY3:
626 printf(" D");
627 break;
628 case ND6_LLINFO_PROBE4:
629 printf(" P");
630 break;
631 default:
632 printf(" ?");
633 break;
634 }
635
636 isrouter = nbi->isrouter;
637 prbs = nbi->asked;
638 } else {
639 warnx("failed to get neighbor information");
640 printf(" ");
641 }
642
643 printf(" %s%s%s",
644 (rtm->rtm_flags & RTF_LOCAL0x200000) ? "l" : "",
645 isrouter ? "R" : "",
646 (rtm->rtm_flags & RTF_ANNOUNCE0x4000) ? "p" : "");
647
648 if (prbs)
649 printf(" %d", prbs);
650
651 printf("\n");
652 }
653
654 if (repeat) {
655 printf("\n");
656 fflush(stdout(&__sF[1]));
657 sleep(repeat);
658 goto again;
659 }
660
661 free(buf);
662}
663
664static struct in6_nbrinfo *
665getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
666{
667 static struct in6_nbrinfo nbi;
668 int s;
669
670 if ((s = socket(AF_INET624, SOCK_DGRAM2, 0)) == -1)
671 err(1, "socket");
672
673 bzero(&nbi, sizeof(nbi));
674 if_indextoname(ifindex, nbi.ifname);
675 nbi.addr = *addr;
676 if (ioctl(s, SIOCGNBRINFO_IN6(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof
(struct in6_nbrinfo) & 0x1fff) << 16) | ((('i')) <<
8) | ((78))), (caddr_t)&nbi) == -1) {
677 if (warning)
678 warn("ioctl(SIOCGNBRINFO_IN6)");
679 close(s);
680 return(NULL((void *)0));
681 }
682
683 close(s);
684 return(&nbi);
685}
686
687static char *
688ether_str(struct sockaddr_dl *sdl)
689{
690 static char hbuf[NI_MAXHOST256];
691 u_char *cp;
692
693 if (sdl->sdl_alen) {
694 cp = (u_char *)LLADDR(sdl)((caddr_t)((sdl)->sdl_data + (sdl)->sdl_nlen));
695 snprintf(hbuf, sizeof(hbuf), "%02x:%02x:%02x:%02x:%02x:%02x",
696 cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
697 } else
698 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
699
700 return(hbuf);
701}
702
703int
704ndp_ether_aton(const char *a, u_char *n)
705{
706 int i, o[6];
707
708 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
709 &o[3], &o[4], &o[5]);
710 if (i != 6) {
711 warnx("invalid Ethernet address '%s'", a);
712 return (1);
713 }
714 for (i = 0; i < 6; i++)
715 n[i] = o[i];
716 return (0);
717}
718
719void
720usage(void)
721{
722 printf("usage: ndp [-acnt] ");
723 printf("[-A wait] [-d hostname] [-f filename] [-i interface]\n");
724 printf("\t[-s nodename ether_addr [temp] [proxy]] ");
725 printf("[-V rdomain] [hostname]\n");
726 exit(1);
727}
728
729int
730rtmsg(int cmd)
731{
732 static int seq;
733 int rlen;
734 struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
735 char *cp = m_rtmsg.m_space;
736 int l;
737
738 errno(*__errno()) = 0;
739 if (cmd == RTM_DELETE0x2)
740 goto doit;
741 bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
742 rtm->rtm_flags = flags;
743 rtm->rtm_version = RTM_VERSION5;
744 rtm->rtm_tableid = rdomain;
745
746 switch (cmd) {
747 default:
748 errx(1, "internal wrong cmd");
749 case RTM_ADD0x1:
750 rtm->rtm_addrs |= RTA_GATEWAY0x2;
751 if (expire_time) {
752 rtm->rtm_rmx.rmx_expire = expire_time;
753 rtm->rtm_inits = RTV_EXPIRE0x4;
754 }
755 rtm->rtm_flags |= (RTF_HOST0x4 | RTF_STATIC0x800);
756#if 0 /* we don't support ipv6addr/128 type proxying. */
757 if (rtm->rtm_flags & RTF_ANNOUNCE0x4000) {
758 rtm->rtm_flags &= ~RTF_HOST0x4;
759 rtm->rtm_addrs |= RTA_NETMASK0x4;
760 }
761#endif
762 /* FALLTHROUGH */
763 case RTM_GET0x4:
764 rtm->rtm_addrs |= (RTA_DST0x1 | RTA_IFP0x10);
765 }
766
767#define NEXTADDR(w, s)if (rtm->rtm_addrs & (w)) { memcpy(cp, &(s), sizeof
(s)); (cp += ((((struct sockaddr *)&(s))->sa_len) >
0 ? (1 + (((((struct sockaddr *)&(s))->sa_len) - 1) |
(sizeof(long) - 1))) : sizeof(long))); } \
768 if (rtm->rtm_addrs & (w)) { \
769 memcpy(cp, &(s), sizeof(s)); \
770 ADVANCE(cp, (struct sockaddr *)&(s))(cp += ((((struct sockaddr *)&(s))->sa_len) > 0 ? (
1 + (((((struct sockaddr *)&(s))->sa_len) - 1) | (sizeof
(long) - 1))) : sizeof(long))); \
771 }
772
773#ifdef __KAME__
774 {
775 struct sockaddr_in6 sin6 = sin_m;
776 struct in6_addr *in6 = &sin6.sin6_addr;
777 if (IN6_IS_ADDR_LINKLOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xfe) && (((in6
)->__u6_addr.__u6_addr8[1] & 0xc0) == 0x80)) ||
778 IN6_IS_ADDR_MC_LINKLOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xff) && (((in6
)->__u6_addr.__u6_addr8[1] & 0x0f) == 0x02)) ||
779 IN6_IS_ADDR_MC_INTFACELOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xff) && (((in6
)->__u6_addr.__u6_addr8[1] & 0x0f) == 0x01))) {
780 *(u_int16_t *)& in6->s6_addr__u6_addr.__u6_addr8[2] =
781 htons(sin6.sin6_scope_id)(__uint16_t)(__builtin_constant_p(sin6.sin6_scope_id) ? (__uint16_t
)(((__uint16_t)(sin6.sin6_scope_id) & 0xffU) << 8 |
((__uint16_t)(sin6.sin6_scope_id) & 0xff00U) >> 8)
: __swap16md(sin6.sin6_scope_id));
782 sin6.sin6_scope_id = 0;
783 }
784 NEXTADDR(RTA_DST, sin6)if (rtm->rtm_addrs & (0x1)) { memcpy(cp, &(sin6), sizeof
(sin6)); (cp += ((((struct sockaddr *)&(sin6))->sa_len
) > 0 ? (1 + (((((struct sockaddr *)&(sin6))->sa_len
) - 1) | (sizeof(long) - 1))) : sizeof(long))); };
785 }
786#else
787 NEXTADDR(RTA_DST, sin_m)if (rtm->rtm_addrs & (0x1)) { memcpy(cp, &(sin_m),
sizeof(sin_m)); (cp += ((((struct sockaddr *)&(sin_m))->
sa_len) > 0 ? (1 + (((((struct sockaddr *)&(sin_m))->
sa_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); };
788#endif
789 NEXTADDR(RTA_GATEWAY, sdl_m)if (rtm->rtm_addrs & (0x2)) { memcpy(cp, &(sdl_m),
sizeof(sdl_m)); (cp += ((((struct sockaddr *)&(sdl_m))->
sa_len) > 0 ? (1 + (((((struct sockaddr *)&(sdl_m))->
sa_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); };
790#if 0 /* we don't support ipv6addr/128 type proxying. */
791 memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
792 NEXTADDR(RTA_NETMASK, so_mask)if (rtm->rtm_addrs & (0x4)) { memcpy(cp, &(so_mask
), sizeof(so_mask)); (cp += ((((struct sockaddr *)&(so_mask
))->sa_len) > 0 ? (1 + (((((struct sockaddr *)&(so_mask
))->sa_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); };
793#endif
794 NEXTADDR(RTA_IFP, ifp_m)if (rtm->rtm_addrs & (0x10)) { memcpy(cp, &(ifp_m)
, sizeof(ifp_m)); (cp += ((((struct sockaddr *)&(ifp_m))->
sa_len) > 0 ? (1 + (((((struct sockaddr *)&(ifp_m))->
sa_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); };
795
796 rtm->rtm_msglen = cp - (char *)&m_rtmsg;
797doit:
798 l = rtm->rtm_msglen;
799 rtm->rtm_seq = ++seq;
800 rtm->rtm_type = cmd;
801 if ((rlen = write(rtsock, (char *)&m_rtmsg, l)) == -1) {
Although the value stored to 'rlen' is used in the enclosing expression, the value is never actually read from 'rlen'
802 if (errno(*__errno()) != ESRCH3 || cmd != RTM_DELETE0x2) {
803 err(1, "writing to routing socket");
804 }
805 }
806 do {
807 l = read(rtsock, (char *)&m_rtmsg, sizeof(m_rtmsg));
808 } while (l > 0 && (rtm->rtm_version != RTM_VERSION5 ||
809 rtm->rtm_seq != seq || rtm->rtm_pid != pid));
810 if (l == -1)
811 warn("read from routing socket");
812 return (0);
813}
814
815int
816rtget(struct sockaddr_in6 **sinp, struct sockaddr_dl **sdlp)
817{
818 struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
819 struct sockaddr_in6 *sin = NULL((void *)0);
820 struct sockaddr_dl *sdl = NULL((void *)0);
821 struct sockaddr *sa;
822 char *cp;
823 unsigned int i;
824
825 if (rtmsg(RTM_GET0x4) < 0)
826 return (1);
827
828 if (rtm->rtm_addrs) {
829 cp = ((char *)rtm + rtm->rtm_hdrlen);
830 for (i = 1; i; i <<= 1) {
831 if (i & rtm->rtm_addrs) {
832 sa = (struct sockaddr *)cp;
833 switch (i) {
834 case RTA_DST0x1:
835 sin = (struct sockaddr_in6 *)sa;
836 break;
837 case RTA_IFP0x10:
838 sdl = (struct sockaddr_dl *)sa;
839 break;
840 default:
841 break;
842 }
843 ADVANCE(cp, sa)(cp += (((sa)->sa_len) > 0 ? (1 + ((((sa)->sa_len) -
1) | (sizeof(long) - 1))) : sizeof(long)));
844 }
845 }
846 }
847
848 if (sin == NULL((void *)0) || sdl == NULL((void *)0))
849 return (1);
850
851#ifdef __KAME__
852 {
853 static struct sockaddr_in6 ksin;
854 struct in6_addr *in6;
855
856 /* do not damage the route message, we need it for delete */
857 ksin = *sin;
858 sin = &ksin;
859 in6 = &sin->sin6_addr;
860
861 if ((IN6_IS_ADDR_LINKLOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xfe) && (((in6
)->__u6_addr.__u6_addr8[1] & 0xc0) == 0x80)) ||
862 IN6_IS_ADDR_MC_LINKLOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xff) && (((in6
)->__u6_addr.__u6_addr8[1] & 0x0f) == 0x02)) ||
863 IN6_IS_ADDR_MC_INTFACELOCAL(in6)(((in6)->__u6_addr.__u6_addr8[0] == 0xff) && (((in6
)->__u6_addr.__u6_addr8[1] & 0x0f) == 0x01))) &&
864 sin->sin6_scope_id == 0) {
865 sin->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)(__uint16_t)(__builtin_constant_p(*(u_short *) &in6->__u6_addr
.__u6_addr8[2]) ? (__uint16_t)(((__uint16_t)(*(u_short *) &
in6->__u6_addr.__u6_addr8[2]) & 0xffU) << 8 | ((
__uint16_t)(*(u_short *) &in6->__u6_addr.__u6_addr8[2]
) & 0xff00U) >> 8) : __swap16md(*(u_short *) &in6
->__u6_addr.__u6_addr8[2]))
866 &in6->s6_addr[2])(__uint16_t)(__builtin_constant_p(*(u_short *) &in6->__u6_addr
.__u6_addr8[2]) ? (__uint16_t)(((__uint16_t)(*(u_short *) &
in6->__u6_addr.__u6_addr8[2]) & 0xffU) << 8 | ((
__uint16_t)(*(u_short *) &in6->__u6_addr.__u6_addr8[2]
) & 0xff00U) >> 8) : __swap16md(*(u_short *) &in6
->__u6_addr.__u6_addr8[2]));
867 *(u_short *)&in6->s6_addr__u6_addr.__u6_addr8[2] = 0;
868 }
869 }
870#endif
871 *sinp = sin;
872 *sdlp = sdl;
873
874 return (0);
875}
876
877void
878ifinfo(const char *ifname)
879{
880 struct in6_ndireq nd;
881 int s;
882
883 if ((s = socket(AF_INET624, SOCK_DGRAM2, 0)) == -1) {
884 err(1, "socket");
885 }
886 bzero(&nd, sizeof(nd));
887 strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
888 if (ioctl(s, SIOCGIFINFO_IN6(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof
(struct in6_ndireq) & 0x1fff) << 16) | ((('i')) <<
8) | ((108))), (caddr_t)&nd) == -1)
889 err(1, "ioctl(SIOCGIFINFO_IN6)");
890
891 printf("reachable=%ds\n", nd.ndi.reachable);
892
893 close(s);
894}
895
896static char *
897sec2str(time_t total)
898{
899 static char result[256];
900 int days, hours, mins, secs;
901 int first = 1;
902 char *p = result;
903 char *ep = &result[sizeof(result)];
904 int n;
905
906 days = total / 3600 / 24;
907 hours = (total / 3600) % 24;
908 mins = (total / 60) % 60;
909 secs = total % 60;
910
911 if (days) {
912 first = 0;
913 n = snprintf(p, ep - p, "%dd", days);
914 if (n < 0 || n >= ep - p)
915 return "?";
916 p += n;
917 }
918 if (!first || hours) {
919 first = 0;
920 n = snprintf(p, ep - p, "%dh", hours);
921 if (n < 0 || n >= ep - p)
922 return "?";
923 p += n;
924 }
925 if (!first || mins) {
926 first = 0;
927 n = snprintf(p, ep - p, "%dm", mins);
928 if (n < 0 || n >= ep - p)
929 return "?";
930 p += n;
931 }
932 snprintf(p, ep - p, "%ds", secs);
933
934 return(result);
935}