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Changes for kernel and Busybox
[tomato.git] / release / src / router / busybox / networking / libiproute / ipaddress.c
blobb3748e8c591323783f609ea28c0ef991156788d4
1 /* vi: set sw=4 ts=4: */
2 /*
3 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
4 *
5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
6 *
7 * Changes:
8 * Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated
9 */
10
11 #include <fnmatch.h>
12 #include <net/if.h>
13 #include <net/if_arp.h>
14
15 #include "ip_common.h" /* #include "libbb.h" is inside */
16 #include "rt_names.h"
17 #include "utils.h"
18
19 #ifndef IFF_LOWER_UP
20 /* from linux/if.h */
21 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
22 #endif
23
24 struct filter_t {
25 char *label;
26 char *flushb;
27 struct rtnl_handle *rth;
28 int scope, scopemask;
29 int flags, flagmask;
30 int flushp;
31 int flushe;
32 int ifindex;
33 family_t family;
34 smallint showqueue;
35 smallint oneline;
36 smallint up;
37 smallint flushed;
38 inet_prefix pfx;
39 } FIX_ALIASING;
40 typedef struct filter_t filter_t;
41
42 #define G_filter (*(filter_t*)&bb_common_bufsiz1)
43
44
45 static void print_link_flags(unsigned flags, unsigned mdown)
46 {
47 static const int flag_masks[] = {
48 IFF_LOOPBACK, IFF_BROADCAST, IFF_POINTOPOINT,
49 IFF_MULTICAST, IFF_NOARP, IFF_UP, IFF_LOWER_UP };
50 static const char flag_labels[] ALIGN1 =
51 "LOOPBACK\0""BROADCAST\0""POINTOPOINT\0"
52 "MULTICAST\0""NOARP\0""UP\0""LOWER_UP\0";
53
54 bb_putchar('<');
55 if (flags & IFF_UP && !(flags & IFF_RUNNING))
56 printf("NO-CARRIER,");
57 flags &= ~IFF_RUNNING;
58 #if 0
59 _PF(ALLMULTI);
60 _PF(PROMISC);
61 _PF(MASTER);
62 _PF(SLAVE);
63 _PF(DEBUG);
64 _PF(DYNAMIC);
65 _PF(AUTOMEDIA);
66 _PF(PORTSEL);
67 _PF(NOTRAILERS);
68 #endif
69 flags = print_flags_separated(flag_masks, flag_labels, flags, ",");
70 if (flags)
71 printf("%x", flags);
72 if (mdown)
73 printf(",M-DOWN");
74 printf("> ");
75 }
76
77 static void print_queuelen(char *name)
78 {
79 struct ifreq ifr;
80 int s;
81
82 s = socket(AF_INET, SOCK_STREAM, 0);
83 if (s < 0)
84 return;
85
86 memset(&ifr, 0, sizeof(ifr));
87 strncpy_IFNAMSIZ(ifr.ifr_name, name);
88 if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) {
89 close(s);
90 return;
91 }
92 close(s);
93
94 if (ifr.ifr_qlen)
95 printf("qlen %d", ifr.ifr_qlen);
96 }
97
98 static NOINLINE int print_linkinfo(const struct nlmsghdr *n)
99 {
100 struct ifinfomsg *ifi = NLMSG_DATA(n);
101 struct rtattr *tb[IFLA_MAX+1];
102 int len = n->nlmsg_len;
103
104 if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
105 return 0;
106
107 len -= NLMSG_LENGTH(sizeof(*ifi));
108 if (len < 0)
109 return -1;
110
111 if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
112 return 0;
113 if (G_filter.up && !(ifi->ifi_flags & IFF_UP))
114 return 0;
115
116 memset(tb, 0, sizeof(tb));
117 parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
118 if (tb[IFLA_IFNAME] == NULL) {
119 bb_error_msg("nil ifname");
120 return -1;
121 }
122 if (G_filter.label
123 && (!G_filter.family || G_filter.family == AF_PACKET)
124 && fnmatch(G_filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0)
125 ) {
126 return 0;
127 }
128
129 if (n->nlmsg_type == RTM_DELLINK)
130 printf("Deleted ");
131
132 printf("%d: %s", ifi->ifi_index,
133 /*tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>" - we checked tb[IFLA_IFNAME] above*/
134 (char*)RTA_DATA(tb[IFLA_IFNAME])
135 );
136
137 {
138 unsigned m_flag = 0;
139 if (tb[IFLA_LINK]) {
140 SPRINT_BUF(b1);
141 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
142 if (iflink == 0)
143 printf("@NONE: ");
144 else {
145 printf("@%s: ", ll_idx_n2a(iflink, b1));
146 m_flag = ll_index_to_flags(iflink);
147 m_flag = !(m_flag & IFF_UP);
148 }
149 } else {
150 printf(": ");
151 }
152 print_link_flags(ifi->ifi_flags, m_flag);
153 }
154
155 if (tb[IFLA_MTU])
156 printf("mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
157 if (tb[IFLA_QDISC])
158 printf("qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
159 #ifdef IFLA_MASTER
160 if (tb[IFLA_MASTER]) {
161 SPRINT_BUF(b1);
162 printf("master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
163 }
164 #endif
165 /* IFLA_OPERSTATE was added to kernel with the same commit as IFF_DORMANT */
166 #ifdef IFF_DORMANT
167 if (tb[IFLA_OPERSTATE]) {
168 static const char operstate_labels[] ALIGN1 =
169 "UNKNOWN\0""NOTPRESENT\0""DOWN\0""LOWERLAYERDOWN\0"
170 "TESTING\0""DORMANT\0""UP\0";
171 printf("state %s ", nth_string(operstate_labels,
172 *(uint8_t *)RTA_DATA(tb[IFLA_OPERSTATE])));
173 }
174 #endif
175 if (G_filter.showqueue)
176 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
177
178 if (!G_filter.family || G_filter.family == AF_PACKET) {
179 SPRINT_BUF(b1);
180 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
181
182 if (tb[IFLA_ADDRESS]) {
183 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
184 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
185 ifi->ifi_type,
186 b1, sizeof(b1)), stdout);
187 }
188 if (tb[IFLA_BROADCAST]) {
189 if (ifi->ifi_flags & IFF_POINTOPOINT)
190 printf(" peer ");
191 else
192 printf(" brd ");
193 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
194 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
195 ifi->ifi_type,
196 b1, sizeof(b1)), stdout);
197 }
198 }
199 bb_putchar('\n');
200 /*fflush_all();*/
201 return 0;
202 }
203
204 static int flush_update(void)
205 {
206 if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
207 bb_perror_msg("can't send flush request");
208 return -1;
209 }
210 G_filter.flushp = 0;
211 return 0;
212 }
213
214 static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
215 struct nlmsghdr *n, void *arg UNUSED_PARAM)
216 {
217 struct ifaddrmsg *ifa = NLMSG_DATA(n);
218 int len = n->nlmsg_len;
219 struct rtattr * rta_tb[IFA_MAX+1];
220 char abuf[256];
221 SPRINT_BUF(b1);
222
223 if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
224 return 0;
225 len -= NLMSG_LENGTH(sizeof(*ifa));
226 if (len < 0) {
227 bb_error_msg("wrong nlmsg len %d", len);
228 return -1;
229 }
230
231 if (G_filter.flushb && n->nlmsg_type != RTM_NEWADDR)
232 return 0;
233
234 memset(rta_tb, 0, sizeof(rta_tb));
235 parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
236
237 if (!rta_tb[IFA_LOCAL])
238 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
239 if (!rta_tb[IFA_ADDRESS])
240 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
241
242 if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
243 return 0;
244 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
245 return 0;
246 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
247 return 0;
248 if (G_filter.label) {
249 const char *label;
250 if (rta_tb[IFA_LABEL])
251 label = RTA_DATA(rta_tb[IFA_LABEL]);
252 else
253 label = ll_idx_n2a(ifa->ifa_index, b1);
254 if (fnmatch(G_filter.label, label, 0) != 0)
255 return 0;
256 }
257 if (G_filter.pfx.family) {
258 if (rta_tb[IFA_LOCAL]) {
259 inet_prefix dst;
260 memset(&dst, 0, sizeof(dst));
261 dst.family = ifa->ifa_family;
262 memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
263 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
264 return 0;
265 }
266 }
267
268 if (G_filter.flushb) {
269 struct nlmsghdr *fn;
270 if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
271 if (flush_update())
272 return -1;
273 }
274 fn = (struct nlmsghdr*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
275 memcpy(fn, n, n->nlmsg_len);
276 fn->nlmsg_type = RTM_DELADDR;
277 fn->nlmsg_flags = NLM_F_REQUEST;
278 fn->nlmsg_seq = ++G_filter.rth->seq;
279 G_filter.flushp = (((char*)fn) + n->nlmsg_len) - G_filter.flushb;
280 G_filter.flushed = 1;
281 return 0;
282 }
283
284 if (n->nlmsg_type == RTM_DELADDR)
285 printf("Deleted ");
286
287 if (G_filter.oneline)
288 printf("%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
289 if (ifa->ifa_family == AF_INET)
290 printf(" inet ");
291 else if (ifa->ifa_family == AF_INET6)
292 printf(" inet6 ");
293 else
294 printf(" family %d ", ifa->ifa_family);
295
296 if (rta_tb[IFA_LOCAL]) {
297 fputs(rt_addr_n2a(ifa->ifa_family,
298 RTA_DATA(rta_tb[IFA_LOCAL]),
299 abuf, sizeof(abuf)), stdout);
300
301 if (rta_tb[IFA_ADDRESS] == NULL
302 || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
303 ) {
304 printf("/%d ", ifa->ifa_prefixlen);
305 } else {
306 printf(" peer %s/%d ",
307 rt_addr_n2a(ifa->ifa_family,
308 RTA_DATA(rta_tb[IFA_ADDRESS]),
309 abuf, sizeof(abuf)),
310 ifa->ifa_prefixlen);
311 }
312 }
313
314 if (rta_tb[IFA_BROADCAST]) {
315 printf("brd %s ",
316 rt_addr_n2a(ifa->ifa_family,
317 RTA_DATA(rta_tb[IFA_BROADCAST]),
318 abuf, sizeof(abuf)));
319 }
320 if (rta_tb[IFA_ANYCAST]) {
321 printf("any %s ",
322 rt_addr_n2a(ifa->ifa_family,
323 RTA_DATA(rta_tb[IFA_ANYCAST]),
324 abuf, sizeof(abuf)));
325 }
326 printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1));
327 if (ifa->ifa_flags & IFA_F_SECONDARY) {
328 ifa->ifa_flags &= ~IFA_F_SECONDARY;
329 printf("secondary ");
330 }
331 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
332 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
333 printf("tentative ");
334 }
335 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
336 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
337 printf("deprecated ");
338 }
339 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
340 printf("dynamic ");
341 } else
342 ifa->ifa_flags &= ~IFA_F_PERMANENT;
343 if (ifa->ifa_flags)
344 printf("flags %02x ", ifa->ifa_flags);
345 if (rta_tb[IFA_LABEL])
346 fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
347 if (rta_tb[IFA_CACHEINFO]) {
348 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
349 char buf[128];
350 bb_putchar(_SL_);
351 if (ci->ifa_valid == 0xFFFFFFFFU)
352 sprintf(buf, "valid_lft forever");
353 else
354 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
355 if (ci->ifa_prefered == 0xFFFFFFFFU)
356 sprintf(buf+strlen(buf), " preferred_lft forever");
357 else
358 sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
359 printf(" %s", buf);
360 }
361 bb_putchar('\n');
362 /*fflush_all();*/
363 return 0;
364 }
365
366
367 struct nlmsg_list {
368 struct nlmsg_list *next;
369 struct nlmsghdr h;
370 };
371
372 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
373 {
374 for (; ainfo; ainfo = ainfo->next) {
375 struct nlmsghdr *n = &ainfo->h;
376 struct ifaddrmsg *ifa = NLMSG_DATA(n);
377
378 if (n->nlmsg_type != RTM_NEWADDR)
379 continue;
380 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
381 return -1;
382 if (ifa->ifa_index != ifindex
383 || (G_filter.family && G_filter.family != ifa->ifa_family)
384 ) {
385 continue;
386 }
387 print_addrinfo(NULL, n, NULL);
388 }
389 return 0;
390 }
391
392
393 static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
394 {
395 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
396 struct nlmsg_list *h;
397 struct nlmsg_list **lp;
398
399 h = xzalloc(n->nlmsg_len + sizeof(void*));
400
401 memcpy(&h->h, n, n->nlmsg_len);
402 /*h->next = NULL; - xzalloc did it */
403
404 for (lp = linfo; *lp; lp = &(*lp)->next)
405 continue;
406 *lp = h;
407
408 ll_remember_index(who, n, NULL);
409 return 0;
410 }
411
412 static void ipaddr_reset_filter(int _oneline)
413 {
414 memset(&G_filter, 0, sizeof(G_filter));
415 G_filter.oneline = _oneline;
416 }
417
418 /* Return value becomes exitcode. It's okay to not return at all */
419 int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
420 {
421 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
422
423 struct nlmsg_list *linfo = NULL;
424 struct nlmsg_list *ainfo = NULL;
425 struct nlmsg_list *l;
426 struct rtnl_handle rth;
427 char *filter_dev = NULL;
428 int no_link = 0;
429
430 ipaddr_reset_filter(oneline);
431 G_filter.showqueue = 1;
432
433 if (G_filter.family == AF_UNSPEC)
434 G_filter.family = preferred_family;
435
436 if (flush) {
437 if (!*argv) {
438 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
439 }
440 if (G_filter.family == AF_PACKET) {
441 bb_error_msg_and_die("can't flush link addresses");
442 }
443 }
444
445 while (*argv) {
446 const smalluint key = index_in_strings(option, *argv);
447 if (key == 0) { /* to */
448 NEXT_ARG();
449 get_prefix(&G_filter.pfx, *argv, G_filter.family);
450 if (G_filter.family == AF_UNSPEC) {
451 G_filter.family = G_filter.pfx.family;
452 }
453 } else if (key == 1) { /* scope */
454 uint32_t scope = 0;
455 NEXT_ARG();
456 G_filter.scopemask = -1;
457 if (rtnl_rtscope_a2n(&scope, *argv)) {
458 if (strcmp(*argv, "all") != 0) {
459 invarg(*argv, "scope");
460 }
461 scope = RT_SCOPE_NOWHERE;
462 G_filter.scopemask = 0;
463 }
464 G_filter.scope = scope;
465 } else if (key == 2) { /* up */
466 G_filter.up = 1;
467 } else if (key == 3) { /* label */
468 NEXT_ARG();
469 G_filter.label = *argv;
470 } else {
471 if (key == 4) /* dev */
472 NEXT_ARG();
473 if (filter_dev)
474 duparg2("dev", *argv);
475 filter_dev = *argv;
476 }
477 argv++;
478 }
479
480 xrtnl_open(&rth);
481
482 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
483 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
484
485 if (filter_dev) {
486 G_filter.ifindex = xll_name_to_index(filter_dev);
487 }
488
489 if (flush) {
490 char flushb[4096-512];
491
492 G_filter.flushb = flushb;
493 G_filter.flushp = 0;
494 G_filter.flushe = sizeof(flushb);
495 G_filter.rth = &rth;
496
497 for (;;) {
498 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
499 G_filter.flushed = 0;
500 xrtnl_dump_filter(&rth, print_addrinfo, NULL);
501 if (G_filter.flushed == 0) {
502 return 0;
503 }
504 if (flush_update() < 0) {
505 return 1;
506 }
507 }
508 }
509
510 if (G_filter.family != AF_PACKET) {
511 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
512 xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
513 }
514
515
516 if (G_filter.family && G_filter.family != AF_PACKET) {
517 struct nlmsg_list **lp;
518 lp = &linfo;
519
520 if (G_filter.oneline)
521 no_link = 1;
522
523 while ((l = *lp) != NULL) {
524 int ok = 0;
525 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
526 struct nlmsg_list *a;
527
528 for (a = ainfo; a; a = a->next) {
529 struct nlmsghdr *n = &a->h;
530 struct ifaddrmsg *ifa = NLMSG_DATA(n);
531
532 if (ifa->ifa_index != ifi->ifi_index
533 || (G_filter.family && G_filter.family != ifa->ifa_family)
534 ) {
535 continue;
536 }
537 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
538 continue;
539 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
540 continue;
541 if (G_filter.pfx.family || G_filter.label) {
542 struct rtattr *tb[IFA_MAX+1];
543 memset(tb, 0, sizeof(tb));
544 parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
545 if (!tb[IFA_LOCAL])
546 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
547
548 if (G_filter.pfx.family && tb[IFA_LOCAL]) {
549 inet_prefix dst;
550 memset(&dst, 0, sizeof(dst));
551 dst.family = ifa->ifa_family;
552 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
553 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
554 continue;
555 }
556 if (G_filter.label) {
557 SPRINT_BUF(b1);
558 const char *label;
559 if (tb[IFA_LABEL])
560 label = RTA_DATA(tb[IFA_LABEL]);
561 else
562 label = ll_idx_n2a(ifa->ifa_index, b1);
563 if (fnmatch(G_filter.label, label, 0) != 0)
564 continue;
565 }
566 }
567
568 ok = 1;
569 break;
570 }
571 if (!ok)
572 *lp = l->next;
573 else
574 lp = &l->next;
575 }
576 }
577
578 for (l = linfo; l; l = l->next) {
579 if (no_link || print_linkinfo(&l->h) == 0) {
580 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
581 if (G_filter.family != AF_PACKET)
582 print_selected_addrinfo(ifi->ifi_index, ainfo);
583 }
584 }
585
586 return 0;
587 }
588
589 static int default_scope(inet_prefix *lcl)
590 {
591 if (lcl->family == AF_INET) {
592 if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
593 return RT_SCOPE_HOST;
594 }
595 return 0;
596 }
597
598 /* Return value becomes exitcode. It's okay to not return at all */
599 static int ipaddr_modify(int cmd, char **argv)
600 {
601 static const char option[] ALIGN1 =
602 "peer\0""remote\0""broadcast\0""brd\0"
603 "anycast\0""scope\0""dev\0""label\0""local\0";
604 struct rtnl_handle rth;
605 struct {
606 struct nlmsghdr n;
607 struct ifaddrmsg ifa;
608 char buf[256];
609 } req;
610 char *d = NULL;
611 char *l = NULL;
612 inet_prefix lcl;
613 inet_prefix peer;
614 int local_len = 0;
615 int peer_len = 0;
616 int brd_len = 0;
617 int any_len = 0;
618 bool scoped = 0;
619
620 memset(&req, 0, sizeof(req));
621
622 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
623 req.n.nlmsg_flags = NLM_F_REQUEST;
624 req.n.nlmsg_type = cmd;
625 req.ifa.ifa_family = preferred_family;
626
627 while (*argv) {
628 const smalluint arg = index_in_strings(option, *argv);
629 if (arg <= 1) { /* peer, remote */
630 NEXT_ARG();
631
632 if (peer_len) {
633 duparg("peer", *argv);
634 }
635 get_prefix(&peer, *argv, req.ifa.ifa_family);
636 peer_len = peer.bytelen;
637 if (req.ifa.ifa_family == AF_UNSPEC) {
638 req.ifa.ifa_family = peer.family;
639 }
640 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
641 req.ifa.ifa_prefixlen = peer.bitlen;
642 } else if (arg <= 3) { /* broadcast, brd */
643 inet_prefix addr;
644 NEXT_ARG();
645 if (brd_len) {
646 duparg("broadcast", *argv);
647 }
648 if (LONE_CHAR(*argv, '+')) {
649 brd_len = -1;
650 } else if (LONE_DASH(*argv)) {
651 brd_len = -2;
652 } else {
653 get_addr(&addr, *argv, req.ifa.ifa_family);
654 if (req.ifa.ifa_family == AF_UNSPEC)
655 req.ifa.ifa_family = addr.family;
656 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
657 brd_len = addr.bytelen;
658 }
659 } else if (arg == 4) { /* anycast */
660 inet_prefix addr;
661 NEXT_ARG();
662 if (any_len) {
663 duparg("anycast", *argv);
664 }
665 get_addr(&addr, *argv, req.ifa.ifa_family);
666 if (req.ifa.ifa_family == AF_UNSPEC) {
667 req.ifa.ifa_family = addr.family;
668 }
669 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
670 any_len = addr.bytelen;
671 } else if (arg == 5) { /* scope */
672 uint32_t scope = 0;
673 NEXT_ARG();
674 if (rtnl_rtscope_a2n(&scope, *argv)) {
675 invarg(*argv, "scope");
676 }
677 req.ifa.ifa_scope = scope;
678 scoped = 1;
679 } else if (arg == 6) { /* dev */
680 NEXT_ARG();
681 d = *argv;
682 } else if (arg == 7) { /* label */
683 NEXT_ARG();
684 l = *argv;
685 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
686 } else {
687 if (arg == 8) /* local */
688 NEXT_ARG();
689 if (local_len) {
690 duparg2("local", *argv);
691 }
692 get_prefix(&lcl, *argv, req.ifa.ifa_family);
693 if (req.ifa.ifa_family == AF_UNSPEC) {
694 req.ifa.ifa_family = lcl.family;
695 }
696 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
697 local_len = lcl.bytelen;
698 }
699 argv++;
700 }
701
702 if (!d) {
703 /* There was no "dev IFACE", but we need that */
704 bb_error_msg_and_die("need \"dev IFACE\"");
705 }
706 if (l && strncmp(d, l, strlen(d)) != 0) {
707 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
708 }
709
710 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
711 peer = lcl;
712 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
713 }
714 if (req.ifa.ifa_prefixlen == 0)
715 req.ifa.ifa_prefixlen = lcl.bitlen;
716
717 if (brd_len < 0 && cmd != RTM_DELADDR) {
718 inet_prefix brd;
719 int i;
720 if (req.ifa.ifa_family != AF_INET) {
721 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
722 }
723 brd = peer;
724 if (brd.bitlen <= 30) {
725 for (i=31; i>=brd.bitlen; i--) {
726 if (brd_len == -1)
727 brd.data[0] |= htonl(1<<(31-i));
728 else
729 brd.data[0] &= ~htonl(1<<(31-i));
730 }
731 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
732 brd_len = brd.bytelen;
733 }
734 }
735 if (!scoped && cmd != RTM_DELADDR)
736 req.ifa.ifa_scope = default_scope(&lcl);
737
738 xrtnl_open(&rth);
739
740 ll_init_map(&rth);
741
742 req.ifa.ifa_index = xll_name_to_index(d);
743
744 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
745 return 2;
746
747 return 0;
748 }
749
750 /* Return value becomes exitcode. It's okay to not return at all */
751 int FAST_FUNC do_ipaddr(char **argv)
752 {
753 static const char commands[] ALIGN1 =
754 "add\0""delete\0""list\0""show\0""lst\0""flush\0";
755 smalluint cmd = 2;
756 if (*argv) {
757 cmd = index_in_substrings(commands, *argv);
758 if (cmd > 5)
759 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
760 argv++;
761 if (cmd <= 1)
762 return ipaddr_modify((cmd == 0) ? RTM_NEWADDR : RTM_DELADDR, argv);
763 }
764 /* 2 == list, 3 == show, 4 == lst */
765 return ipaddr_list_or_flush(argv, cmd == 5);
766 }
Tomato firmware and modifications.