source: MondoRescue/branches/3.2/mindi-busybox/networking/libiproute/ipaddress.c@ 3186

Last change on this file since 3186 was 2725, checked in by Bruno Cornec, 13 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
File size: 18.6 KB
Line 
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
24struct 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;
40typedef struct filter_t filter_t;
41
42#define G_filter (*(filter_t*)&bb_common_bufsiz1)
43
44
45static 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
77static 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
98static 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 if (tb[IFLA_OPERSTATE]) {
166 static const char operstate_labels[] ALIGN1 =
167 "UNKNOWN\0""NOTPRESENT\0""DOWN\0""LOWERLAYERDOWN\0"
168 "TESTING\0""DORMANT\0""UP\0";
169 printf("state %s ", nth_string(operstate_labels,
170 *(uint8_t *)RTA_DATA(tb[IFLA_OPERSTATE])));
171 }
172 if (G_filter.showqueue)
173 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
174
175 if (!G_filter.family || G_filter.family == AF_PACKET) {
176 SPRINT_BUF(b1);
177 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
178
179 if (tb[IFLA_ADDRESS]) {
180 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
181 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
182 ifi->ifi_type,
183 b1, sizeof(b1)), stdout);
184 }
185 if (tb[IFLA_BROADCAST]) {
186 if (ifi->ifi_flags & IFF_POINTOPOINT)
187 printf(" peer ");
188 else
189 printf(" brd ");
190 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
191 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
192 ifi->ifi_type,
193 b1, sizeof(b1)), stdout);
194 }
195 }
196 bb_putchar('\n');
197 /*fflush_all();*/
198 return 0;
199}
200
201static int flush_update(void)
202{
203 if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
204 bb_perror_msg("can't send flush request");
205 return -1;
206 }
207 G_filter.flushp = 0;
208 return 0;
209}
210
211static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
212 struct nlmsghdr *n, void *arg UNUSED_PARAM)
213{
214 struct ifaddrmsg *ifa = NLMSG_DATA(n);
215 int len = n->nlmsg_len;
216 struct rtattr * rta_tb[IFA_MAX+1];
217 char abuf[256];
218 SPRINT_BUF(b1);
219
220 if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
221 return 0;
222 len -= NLMSG_LENGTH(sizeof(*ifa));
223 if (len < 0) {
224 bb_error_msg("wrong nlmsg len %d", len);
225 return -1;
226 }
227
228 if (G_filter.flushb && n->nlmsg_type != RTM_NEWADDR)
229 return 0;
230
231 memset(rta_tb, 0, sizeof(rta_tb));
232 parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
233
234 if (!rta_tb[IFA_LOCAL])
235 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
236 if (!rta_tb[IFA_ADDRESS])
237 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
238
239 if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
240 return 0;
241 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
242 return 0;
243 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
244 return 0;
245 if (G_filter.label) {
246 const char *label;
247 if (rta_tb[IFA_LABEL])
248 label = RTA_DATA(rta_tb[IFA_LABEL]);
249 else
250 label = ll_idx_n2a(ifa->ifa_index, b1);
251 if (fnmatch(G_filter.label, label, 0) != 0)
252 return 0;
253 }
254 if (G_filter.pfx.family) {
255 if (rta_tb[IFA_LOCAL]) {
256 inet_prefix dst;
257 memset(&dst, 0, sizeof(dst));
258 dst.family = ifa->ifa_family;
259 memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
260 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
261 return 0;
262 }
263 }
264
265 if (G_filter.flushb) {
266 struct nlmsghdr *fn;
267 if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
268 if (flush_update())
269 return -1;
270 }
271 fn = (struct nlmsghdr*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
272 memcpy(fn, n, n->nlmsg_len);
273 fn->nlmsg_type = RTM_DELADDR;
274 fn->nlmsg_flags = NLM_F_REQUEST;
275 fn->nlmsg_seq = ++G_filter.rth->seq;
276 G_filter.flushp = (((char*)fn) + n->nlmsg_len) - G_filter.flushb;
277 G_filter.flushed = 1;
278 return 0;
279 }
280
281 if (n->nlmsg_type == RTM_DELADDR)
282 printf("Deleted ");
283
284 if (G_filter.oneline)
285 printf("%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
286 if (ifa->ifa_family == AF_INET)
287 printf(" inet ");
288 else if (ifa->ifa_family == AF_INET6)
289 printf(" inet6 ");
290 else
291 printf(" family %d ", ifa->ifa_family);
292
293 if (rta_tb[IFA_LOCAL]) {
294 fputs(rt_addr_n2a(ifa->ifa_family,
295 RTA_DATA(rta_tb[IFA_LOCAL]),
296 abuf, sizeof(abuf)), stdout);
297
298 if (rta_tb[IFA_ADDRESS] == NULL
299 || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
300 ) {
301 printf("/%d ", ifa->ifa_prefixlen);
302 } else {
303 printf(" peer %s/%d ",
304 rt_addr_n2a(ifa->ifa_family,
305 RTA_DATA(rta_tb[IFA_ADDRESS]),
306 abuf, sizeof(abuf)),
307 ifa->ifa_prefixlen);
308 }
309 }
310
311 if (rta_tb[IFA_BROADCAST]) {
312 printf("brd %s ",
313 rt_addr_n2a(ifa->ifa_family,
314 RTA_DATA(rta_tb[IFA_BROADCAST]),
315 abuf, sizeof(abuf)));
316 }
317 if (rta_tb[IFA_ANYCAST]) {
318 printf("any %s ",
319 rt_addr_n2a(ifa->ifa_family,
320 RTA_DATA(rta_tb[IFA_ANYCAST]),
321 abuf, sizeof(abuf)));
322 }
323 printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1));
324 if (ifa->ifa_flags & IFA_F_SECONDARY) {
325 ifa->ifa_flags &= ~IFA_F_SECONDARY;
326 printf("secondary ");
327 }
328 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
329 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
330 printf("tentative ");
331 }
332 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
333 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
334 printf("deprecated ");
335 }
336 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
337 printf("dynamic ");
338 } else
339 ifa->ifa_flags &= ~IFA_F_PERMANENT;
340 if (ifa->ifa_flags)
341 printf("flags %02x ", ifa->ifa_flags);
342 if (rta_tb[IFA_LABEL])
343 fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
344 if (rta_tb[IFA_CACHEINFO]) {
345 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
346 char buf[128];
347 bb_putchar(_SL_);
348 if (ci->ifa_valid == 0xFFFFFFFFU)
349 sprintf(buf, "valid_lft forever");
350 else
351 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
352 if (ci->ifa_prefered == 0xFFFFFFFFU)
353 sprintf(buf+strlen(buf), " preferred_lft forever");
354 else
355 sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
356 printf(" %s", buf);
357 }
358 bb_putchar('\n');
359 /*fflush_all();*/
360 return 0;
361}
362
363
364struct nlmsg_list {
365 struct nlmsg_list *next;
366 struct nlmsghdr h;
367};
368
369static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
370{
371 for (; ainfo; ainfo = ainfo->next) {
372 struct nlmsghdr *n = &ainfo->h;
373 struct ifaddrmsg *ifa = NLMSG_DATA(n);
374
375 if (n->nlmsg_type != RTM_NEWADDR)
376 continue;
377 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
378 return -1;
379 if (ifa->ifa_index != ifindex
380 || (G_filter.family && G_filter.family != ifa->ifa_family)
381 ) {
382 continue;
383 }
384 print_addrinfo(NULL, n, NULL);
385 }
386 return 0;
387}
388
389
390static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
391{
392 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
393 struct nlmsg_list *h;
394 struct nlmsg_list **lp;
395
396 h = xzalloc(n->nlmsg_len + sizeof(void*));
397
398 memcpy(&h->h, n, n->nlmsg_len);
399 /*h->next = NULL; - xzalloc did it */
400
401 for (lp = linfo; *lp; lp = &(*lp)->next)
402 continue;
403 *lp = h;
404
405 ll_remember_index(who, n, NULL);
406 return 0;
407}
408
409static void ipaddr_reset_filter(int _oneline)
410{
411 memset(&G_filter, 0, sizeof(G_filter));
412 G_filter.oneline = _oneline;
413}
414
415/* Return value becomes exitcode. It's okay to not return at all */
416int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
417{
418 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
419
420 struct nlmsg_list *linfo = NULL;
421 struct nlmsg_list *ainfo = NULL;
422 struct nlmsg_list *l;
423 struct rtnl_handle rth;
424 char *filter_dev = NULL;
425 int no_link = 0;
426
427 ipaddr_reset_filter(oneline);
428 G_filter.showqueue = 1;
429
430 if (G_filter.family == AF_UNSPEC)
431 G_filter.family = preferred_family;
432
433 if (flush) {
434 if (!*argv) {
435 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
436 }
437 if (G_filter.family == AF_PACKET) {
438 bb_error_msg_and_die("can't flush link addresses");
439 }
440 }
441
442 while (*argv) {
443 const smalluint key = index_in_strings(option, *argv);
444 if (key == 0) { /* to */
445 NEXT_ARG();
446 get_prefix(&G_filter.pfx, *argv, G_filter.family);
447 if (G_filter.family == AF_UNSPEC) {
448 G_filter.family = G_filter.pfx.family;
449 }
450 } else if (key == 1) { /* scope */
451 uint32_t scope = 0;
452 NEXT_ARG();
453 G_filter.scopemask = -1;
454 if (rtnl_rtscope_a2n(&scope, *argv)) {
455 if (strcmp(*argv, "all") != 0) {
456 invarg(*argv, "scope");
457 }
458 scope = RT_SCOPE_NOWHERE;
459 G_filter.scopemask = 0;
460 }
461 G_filter.scope = scope;
462 } else if (key == 2) { /* up */
463 G_filter.up = 1;
464 } else if (key == 3) { /* label */
465 NEXT_ARG();
466 G_filter.label = *argv;
467 } else {
468 if (key == 4) /* dev */
469 NEXT_ARG();
470 if (filter_dev)
471 duparg2("dev", *argv);
472 filter_dev = *argv;
473 }
474 argv++;
475 }
476
477 xrtnl_open(&rth);
478
479 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
480 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
481
482 if (filter_dev) {
483 G_filter.ifindex = xll_name_to_index(filter_dev);
484 }
485
486 if (flush) {
487 char flushb[4096-512];
488
489 G_filter.flushb = flushb;
490 G_filter.flushp = 0;
491 G_filter.flushe = sizeof(flushb);
492 G_filter.rth = &rth;
493
494 for (;;) {
495 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
496 G_filter.flushed = 0;
497 xrtnl_dump_filter(&rth, print_addrinfo, NULL);
498 if (G_filter.flushed == 0) {
499 return 0;
500 }
501 if (flush_update() < 0) {
502 return 1;
503 }
504 }
505 }
506
507 if (G_filter.family != AF_PACKET) {
508 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
509 xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
510 }
511
512
513 if (G_filter.family && G_filter.family != AF_PACKET) {
514 struct nlmsg_list **lp;
515 lp = &linfo;
516
517 if (G_filter.oneline)
518 no_link = 1;
519
520 while ((l = *lp) != NULL) {
521 int ok = 0;
522 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
523 struct nlmsg_list *a;
524
525 for (a = ainfo; a; a = a->next) {
526 struct nlmsghdr *n = &a->h;
527 struct ifaddrmsg *ifa = NLMSG_DATA(n);
528
529 if (ifa->ifa_index != ifi->ifi_index
530 || (G_filter.family && G_filter.family != ifa->ifa_family)
531 ) {
532 continue;
533 }
534 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
535 continue;
536 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
537 continue;
538 if (G_filter.pfx.family || G_filter.label) {
539 struct rtattr *tb[IFA_MAX+1];
540 memset(tb, 0, sizeof(tb));
541 parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
542 if (!tb[IFA_LOCAL])
543 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
544
545 if (G_filter.pfx.family && tb[IFA_LOCAL]) {
546 inet_prefix dst;
547 memset(&dst, 0, sizeof(dst));
548 dst.family = ifa->ifa_family;
549 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
550 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
551 continue;
552 }
553 if (G_filter.label) {
554 SPRINT_BUF(b1);
555 const char *label;
556 if (tb[IFA_LABEL])
557 label = RTA_DATA(tb[IFA_LABEL]);
558 else
559 label = ll_idx_n2a(ifa->ifa_index, b1);
560 if (fnmatch(G_filter.label, label, 0) != 0)
561 continue;
562 }
563 }
564
565 ok = 1;
566 break;
567 }
568 if (!ok)
569 *lp = l->next;
570 else
571 lp = &l->next;
572 }
573 }
574
575 for (l = linfo; l; l = l->next) {
576 if (no_link || print_linkinfo(&l->h) == 0) {
577 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
578 if (G_filter.family != AF_PACKET)
579 print_selected_addrinfo(ifi->ifi_index, ainfo);
580 }
581 }
582
583 return 0;
584}
585
586static int default_scope(inet_prefix *lcl)
587{
588 if (lcl->family == AF_INET) {
589 if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
590 return RT_SCOPE_HOST;
591 }
592 return 0;
593}
594
595/* Return value becomes exitcode. It's okay to not return at all */
596static int ipaddr_modify(int cmd, char **argv)
597{
598 static const char option[] ALIGN1 =
599 "peer\0""remote\0""broadcast\0""brd\0"
600 "anycast\0""scope\0""dev\0""label\0""local\0";
601 struct rtnl_handle rth;
602 struct {
603 struct nlmsghdr n;
604 struct ifaddrmsg ifa;
605 char buf[256];
606 } req;
607 char *d = NULL;
608 char *l = NULL;
609 inet_prefix lcl;
610 inet_prefix peer;
611 int local_len = 0;
612 int peer_len = 0;
613 int brd_len = 0;
614 int any_len = 0;
615 bool scoped = 0;
616
617 memset(&req, 0, sizeof(req));
618
619 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
620 req.n.nlmsg_flags = NLM_F_REQUEST;
621 req.n.nlmsg_type = cmd;
622 req.ifa.ifa_family = preferred_family;
623
624 while (*argv) {
625 const smalluint arg = index_in_strings(option, *argv);
626 if (arg <= 1) { /* peer, remote */
627 NEXT_ARG();
628
629 if (peer_len) {
630 duparg("peer", *argv);
631 }
632 get_prefix(&peer, *argv, req.ifa.ifa_family);
633 peer_len = peer.bytelen;
634 if (req.ifa.ifa_family == AF_UNSPEC) {
635 req.ifa.ifa_family = peer.family;
636 }
637 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
638 req.ifa.ifa_prefixlen = peer.bitlen;
639 } else if (arg <= 3) { /* broadcast, brd */
640 inet_prefix addr;
641 NEXT_ARG();
642 if (brd_len) {
643 duparg("broadcast", *argv);
644 }
645 if (LONE_CHAR(*argv, '+')) {
646 brd_len = -1;
647 } else if (LONE_DASH(*argv)) {
648 brd_len = -2;
649 } else {
650 get_addr(&addr, *argv, req.ifa.ifa_family);
651 if (req.ifa.ifa_family == AF_UNSPEC)
652 req.ifa.ifa_family = addr.family;
653 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
654 brd_len = addr.bytelen;
655 }
656 } else if (arg == 4) { /* anycast */
657 inet_prefix addr;
658 NEXT_ARG();
659 if (any_len) {
660 duparg("anycast", *argv);
661 }
662 get_addr(&addr, *argv, req.ifa.ifa_family);
663 if (req.ifa.ifa_family == AF_UNSPEC) {
664 req.ifa.ifa_family = addr.family;
665 }
666 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
667 any_len = addr.bytelen;
668 } else if (arg == 5) { /* scope */
669 uint32_t scope = 0;
670 NEXT_ARG();
671 if (rtnl_rtscope_a2n(&scope, *argv)) {
672 invarg(*argv, "scope");
673 }
674 req.ifa.ifa_scope = scope;
675 scoped = 1;
676 } else if (arg == 6) { /* dev */
677 NEXT_ARG();
678 d = *argv;
679 } else if (arg == 7) { /* label */
680 NEXT_ARG();
681 l = *argv;
682 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
683 } else {
684 if (arg == 8) /* local */
685 NEXT_ARG();
686 if (local_len) {
687 duparg2("local", *argv);
688 }
689 get_prefix(&lcl, *argv, req.ifa.ifa_family);
690 if (req.ifa.ifa_family == AF_UNSPEC) {
691 req.ifa.ifa_family = lcl.family;
692 }
693 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
694 local_len = lcl.bytelen;
695 }
696 argv++;
697 }
698
699 if (!d) {
700 /* There was no "dev IFACE", but we need that */
701 bb_error_msg_and_die("need \"dev IFACE\"");
702 }
703 if (l && strncmp(d, l, strlen(d)) != 0) {
704 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
705 }
706
707 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
708 peer = lcl;
709 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
710 }
711 if (req.ifa.ifa_prefixlen == 0)
712 req.ifa.ifa_prefixlen = lcl.bitlen;
713
714 if (brd_len < 0 && cmd != RTM_DELADDR) {
715 inet_prefix brd;
716 int i;
717 if (req.ifa.ifa_family != AF_INET) {
718 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
719 }
720 brd = peer;
721 if (brd.bitlen <= 30) {
722 for (i=31; i>=brd.bitlen; i--) {
723 if (brd_len == -1)
724 brd.data[0] |= htonl(1<<(31-i));
725 else
726 brd.data[0] &= ~htonl(1<<(31-i));
727 }
728 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
729 brd_len = brd.bytelen;
730 }
731 }
732 if (!scoped && cmd != RTM_DELADDR)
733 req.ifa.ifa_scope = default_scope(&lcl);
734
735 xrtnl_open(&rth);
736
737 ll_init_map(&rth);
738
739 req.ifa.ifa_index = xll_name_to_index(d);
740
741 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
742 return 2;
743
744 return 0;
745}
746
747/* Return value becomes exitcode. It's okay to not return at all */
748int FAST_FUNC do_ipaddr(char **argv)
749{
750 static const char commands[] ALIGN1 =
751 "add\0""delete\0""list\0""show\0""lst\0""flush\0";
752 smalluint cmd = 2;
753 if (*argv) {
754 cmd = index_in_substrings(commands, *argv);
755 if (cmd > 5)
756 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
757 argv++;
758 if (cmd <= 1)
759 return ipaddr_modify((cmd == 0) ? RTM_NEWADDR : RTM_DELADDR, argv);
760 }
761 /* 2 == list, 3 == show, 4 == lst */
762 return ipaddr_list_or_flush(argv, cmd == 5);
763}
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