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 "common_bufsiz.h"
17 #include "rt_names.h"
18 #include "utils.h"
19
20 #ifndef IFF_LOWER_UP
21 /* from linux/if.h */
22 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
23 #endif
24
25 struct filter_t {
26 char *label;
27 char *flushb;
28 struct rtnl_handle *rth;
29 int scope, scopemask;
30 int flags, flagmask;
31 int flushp;
32 int flushe;
33 int ifindex;
34 family_t family;
35 smallint showqueue;
36 smallint oneline;
37 smallint up;
38 smallint flushed;
39 inet_prefix pfx;
40 } FIX_ALIASING;
41 typedef struct filter_t filter_t;
42
43 #define G_filter (*(filter_t*)bb_common_bufsiz1)
44 #define INIT_G() do { setup_common_bufsiz(); } while (0)
45
print_link_flags(unsigned flags,unsigned mdown)46 static void print_link_flags(unsigned flags, unsigned mdown)
47 {
48 static const int flag_masks[] = {
49 IFF_LOOPBACK, IFF_BROADCAST, IFF_POINTOPOINT,
50 IFF_MULTICAST, IFF_NOARP, IFF_UP, IFF_LOWER_UP };
51 static const char flag_labels[] ALIGN1 =
52 "LOOPBACK\0""BROADCAST\0""POINTOPOINT\0"
53 "MULTICAST\0""NOARP\0""UP\0""LOWER_UP\0";
54
55 bb_putchar('<');
56 if (flags & IFF_UP && !(flags & IFF_RUNNING))
57 printf("NO-CARRIER,");
58 flags &= ~IFF_RUNNING;
59 #if 0
60 _PF(ALLMULTI);
61 _PF(PROMISC);
62 _PF(MASTER);
63 _PF(SLAVE);
64 _PF(DEBUG);
65 _PF(DYNAMIC);
66 _PF(AUTOMEDIA);
67 _PF(PORTSEL);
68 _PF(NOTRAILERS);
69 #endif
70 flags = print_flags_separated(flag_masks, flag_labels, flags, ",");
71 if (flags)
72 printf("%x", flags);
73 if (mdown)
74 printf(",M-DOWN");
75 printf("> ");
76 }
77
print_queuelen(char * name)78 static void print_queuelen(char *name)
79 {
80 struct ifreq ifr;
81 int s;
82
83 s = socket(AF_INET, SOCK_STREAM, 0);
84 if (s < 0)
85 return;
86
87 memset(&ifr, 0, sizeof(ifr));
88 strncpy_IFNAMSIZ(ifr.ifr_name, name);
89 if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) {
90 close(s);
91 return;
92 }
93 close(s);
94
95 if (ifr.ifr_qlen)
96 printf("qlen %d", ifr.ifr_qlen);
97 }
98
print_linkinfo(const struct nlmsghdr * n)99 static NOINLINE int print_linkinfo(const struct nlmsghdr *n)
100 {
101 struct ifinfomsg *ifi = NLMSG_DATA(n);
102 struct rtattr *tb[IFLA_MAX+1];
103 int len = n->nlmsg_len;
104
105 if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
106 return 0;
107
108 len -= NLMSG_LENGTH(sizeof(*ifi));
109 if (len < 0)
110 return -1;
111
112 if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
113 return 0;
114 if (G_filter.up && !(ifi->ifi_flags & IFF_UP))
115 return 0;
116
117 memset(tb, 0, sizeof(tb));
118 parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
119 if (tb[IFLA_IFNAME] == NULL) {
120 bb_error_msg("nil ifname");
121 return -1;
122 }
123 if (G_filter.label
124 && (!G_filter.family || G_filter.family == AF_PACKET)
125 && fnmatch(G_filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0)
126 ) {
127 return 0;
128 }
129
130 if (n->nlmsg_type == RTM_DELLINK)
131 printf("Deleted ");
132
133 printf("%d: %s", ifi->ifi_index,
134 /*tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>" - we checked tb[IFLA_IFNAME] above*/
135 (char*)RTA_DATA(tb[IFLA_IFNAME])
136 );
137
138 {
139 unsigned m_flag = 0;
140 if (tb[IFLA_LINK]) {
141 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
142 if (iflink == 0)
143 printf("@NONE: ");
144 else {
145 printf("@%s: ", ll_index_to_name(iflink));
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 printf("master %s ", ll_index_to_name(*(int*)RTA_DATA(tb[IFLA_MASTER])));
162 }
163 #endif
164 /* IFLA_OPERSTATE was added to kernel with the same commit as IFF_DORMANT */
165 #ifdef IFF_DORMANT
166 if (tb[IFLA_OPERSTATE]) {
167 static const char operstate_labels[] ALIGN1 =
168 "UNKNOWN\0""NOTPRESENT\0""DOWN\0""LOWERLAYERDOWN\0"
169 "TESTING\0""DORMANT\0""UP\0";
170 printf("state %s ", nth_string(operstate_labels,
171 *(uint8_t *)RTA_DATA(tb[IFLA_OPERSTATE])));
172 }
173 #endif
174 if (G_filter.showqueue)
175 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
176
177 if (!G_filter.family || G_filter.family == AF_PACKET) {
178 SPRINT_BUF(b1);
179 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
180
181 if (tb[IFLA_ADDRESS]) {
182 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
183 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
184 ifi->ifi_type,
185 b1, sizeof(b1)), stdout);
186 }
187 if (tb[IFLA_BROADCAST]) {
188 if (ifi->ifi_flags & IFF_POINTOPOINT)
189 printf(" peer ");
190 else
191 printf(" brd ");
192 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
193 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
194 ifi->ifi_type,
195 b1, sizeof(b1)), stdout);
196 }
197 }
198 bb_putchar('\n');
199 /*fflush_all();*/
200 return 0;
201 }
202
flush_update(void)203 static int flush_update(void)
204 {
205 if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
206 bb_perror_msg("can't send flush request");
207 return -1;
208 }
209 G_filter.flushp = 0;
210 return 0;
211 }
212
print_addrinfo(const struct sockaddr_nl * who UNUSED_PARAM,struct nlmsghdr * n,void * arg UNUSED_PARAM)213 static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
214 struct nlmsghdr *n, void *arg UNUSED_PARAM)
215 {
216 struct ifaddrmsg *ifa = NLMSG_DATA(n);
217 int len = n->nlmsg_len;
218 struct rtattr *rta_tb[IFA_MAX+1];
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_index_to_name(ifa->ifa_index);
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, RTA_DATA(rta_tb[IFA_LOCAL])),
295 stdout
296 );
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, RTA_DATA(rta_tb[IFA_ADDRESS])),
305 ifa->ifa_prefixlen
306 );
307 }
308 }
309
310 if (rta_tb[IFA_BROADCAST]) {
311 printf("brd %s ",
312 rt_addr_n2a(ifa->ifa_family,
313 RTA_DATA(rta_tb[IFA_BROADCAST]))
314 );
315 }
316 if (rta_tb[IFA_ANYCAST]) {
317 printf("any %s ",
318 rt_addr_n2a(ifa->ifa_family,
319 RTA_DATA(rta_tb[IFA_ANYCAST]))
320 );
321 }
322 printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope));
323 if (ifa->ifa_flags & IFA_F_SECONDARY) {
324 ifa->ifa_flags &= ~IFA_F_SECONDARY;
325 printf("secondary ");
326 }
327 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
328 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
329 printf("tentative ");
330 }
331 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
332 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
333 printf("deprecated ");
334 }
335 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
336 printf("dynamic ");
337 } else
338 ifa->ifa_flags &= ~IFA_F_PERMANENT;
339 if (ifa->ifa_flags)
340 printf("flags %02x ", ifa->ifa_flags);
341 if (rta_tb[IFA_LABEL])
342 fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
343 if (rta_tb[IFA_CACHEINFO]) {
344 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
345 char buf[128];
346 bb_putchar(_SL_);
347 if (ci->ifa_valid == 0xFFFFFFFFU)
348 sprintf(buf, "valid_lft forever");
349 else
350 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
351 if (ci->ifa_prefered == 0xFFFFFFFFU)
352 sprintf(buf+strlen(buf), " preferred_lft forever");
353 else
354 sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
355 printf(" %s", buf);
356 }
357 bb_putchar('\n');
358 /*fflush_all();*/
359 return 0;
360 }
361
362
363 struct nlmsg_list {
364 struct nlmsg_list *next;
365 struct nlmsghdr h;
366 };
367
print_selected_addrinfo(int ifindex,struct nlmsg_list * ainfo)368 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
369 {
370 for (; ainfo; ainfo = ainfo->next) {
371 struct nlmsghdr *n = &ainfo->h;
372 struct ifaddrmsg *ifa = NLMSG_DATA(n);
373
374 if (n->nlmsg_type != RTM_NEWADDR)
375 continue;
376 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
377 return -1;
378 if (ifa->ifa_index != ifindex
379 || (G_filter.family && G_filter.family != ifa->ifa_family)
380 ) {
381 continue;
382 }
383 print_addrinfo(NULL, n, NULL);
384 }
385 return 0;
386 }
387
388
store_nlmsg(const struct sockaddr_nl * who,struct nlmsghdr * n,void * arg)389 static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
390 {
391 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
392 struct nlmsg_list *h;
393 struct nlmsg_list **lp;
394
395 h = xzalloc(n->nlmsg_len + sizeof(void*));
396
397 memcpy(&h->h, n, n->nlmsg_len);
398 /*h->next = NULL; - xzalloc did it */
399
400 for (lp = linfo; *lp; lp = &(*lp)->next)
401 continue;
402 *lp = h;
403
404 ll_remember_index(who, n, NULL);
405 return 0;
406 }
407
ipaddr_reset_filter(int _oneline)408 static void ipaddr_reset_filter(int _oneline)
409 {
410 memset(&G_filter, 0, sizeof(G_filter));
411 G_filter.oneline = _oneline;
412 }
413
414 /* Return value becomes exitcode. It's okay to not return at all */
ipaddr_list_or_flush(char ** argv,int flush)415 int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
416 {
417 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
418
419 struct nlmsg_list *linfo = NULL;
420 struct nlmsg_list *ainfo = NULL;
421 struct nlmsg_list *l;
422 struct rtnl_handle rth;
423 char *filter_dev = NULL;
424 int no_link = 0;
425
426 ipaddr_reset_filter(oneline);
427 G_filter.showqueue = 1;
428
429 if (G_filter.family == AF_UNSPEC)
430 G_filter.family = preferred_family;
431
432 if (flush) {
433 if (!*argv) {
434 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
435 }
436 if (G_filter.family == AF_PACKET) {
437 bb_error_msg_and_die("can't flush link addresses");
438 }
439 }
440
441 while (*argv) {
442 const smalluint key = index_in_strings(option, *argv);
443 if (key == 0) { /* to */
444 NEXT_ARG();
445 get_prefix(&G_filter.pfx, *argv, G_filter.family);
446 if (G_filter.family == AF_UNSPEC) {
447 G_filter.family = G_filter.pfx.family;
448 }
449 } else if (key == 1) { /* scope */
450 uint32_t scope = 0;
451 NEXT_ARG();
452 G_filter.scopemask = -1;
453 if (rtnl_rtscope_a2n(&scope, *argv)) {
454 if (strcmp(*argv, "all") != 0) {
455 invarg_1_to_2(*argv, "scope");
456 }
457 scope = RT_SCOPE_NOWHERE;
458 G_filter.scopemask = 0;
459 }
460 G_filter.scope = scope;
461 } else if (key == 2) { /* up */
462 G_filter.up = 1;
463 } else if (key == 3) { /* label */
464 NEXT_ARG();
465 G_filter.label = *argv;
466 } else {
467 if (key == 4) /* dev */
468 NEXT_ARG();
469 if (filter_dev)
470 duparg2("dev", *argv);
471 filter_dev = *argv;
472 }
473 argv++;
474 }
475
476 xrtnl_open(&rth);
477
478 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
479 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
480
481 if (filter_dev) {
482 G_filter.ifindex = xll_name_to_index(filter_dev);
483 }
484
485 if (flush) {
486 char flushb[4096-512];
487
488 G_filter.flushb = flushb;
489 G_filter.flushp = 0;
490 G_filter.flushe = sizeof(flushb);
491 G_filter.rth = &rth;
492
493 for (;;) {
494 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
495 G_filter.flushed = 0;
496 xrtnl_dump_filter(&rth, print_addrinfo, NULL);
497 if (G_filter.flushed == 0) {
498 return 0;
499 }
500 if (flush_update() < 0) {
501 return 1;
502 }
503 }
504 }
505
506 if (G_filter.family != AF_PACKET) {
507 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
508 xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
509 }
510
511
512 if (G_filter.family && G_filter.family != AF_PACKET) {
513 struct nlmsg_list **lp;
514 lp = &linfo;
515
516 if (G_filter.oneline)
517 no_link = 1;
518
519 while ((l = *lp) != NULL) {
520 int ok = 0;
521 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
522 struct nlmsg_list *a;
523
524 for (a = ainfo; a; a = a->next) {
525 struct nlmsghdr *n = &a->h;
526 struct ifaddrmsg *ifa = NLMSG_DATA(n);
527
528 if (ifa->ifa_index != ifi->ifi_index
529 || (G_filter.family && G_filter.family != ifa->ifa_family)
530 ) {
531 continue;
532 }
533 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
534 continue;
535 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
536 continue;
537 if (G_filter.pfx.family || G_filter.label) {
538 struct rtattr *tb[IFA_MAX+1];
539 memset(tb, 0, sizeof(tb));
540 parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
541 if (!tb[IFA_LOCAL])
542 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
543
544 if (G_filter.pfx.family && tb[IFA_LOCAL]) {
545 inet_prefix dst;
546 memset(&dst, 0, sizeof(dst));
547 dst.family = ifa->ifa_family;
548 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
549 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
550 continue;
551 }
552 if (G_filter.label) {
553 const char *label;
554 if (tb[IFA_LABEL])
555 label = RTA_DATA(tb[IFA_LABEL]);
556 else
557 label = ll_index_to_name(ifa->ifa_index);
558 if (fnmatch(G_filter.label, label, 0) != 0)
559 continue;
560 }
561 }
562
563 ok = 1;
564 break;
565 }
566 if (!ok)
567 *lp = l->next;
568 else
569 lp = &l->next;
570 }
571 }
572
573 for (l = linfo; l; l = l->next) {
574 if (no_link || print_linkinfo(&l->h) == 0) {
575 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
576 if (G_filter.family != AF_PACKET)
577 print_selected_addrinfo(ifi->ifi_index, ainfo);
578 }
579 }
580
581 return 0;
582 }
583
default_scope(inet_prefix * lcl)584 static int default_scope(inet_prefix *lcl)
585 {
586 if (lcl->family == AF_INET) {
587 if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
588 return RT_SCOPE_HOST;
589 }
590 return 0;
591 }
592
593 /* Return value becomes exitcode. It's okay to not return at all */
ipaddr_modify(int cmd,int flags,char ** argv)594 static int ipaddr_modify(int cmd, int flags, char **argv)
595 {
596 static const char option[] ALIGN1 =
597 "peer\0""remote\0""broadcast\0""brd\0"
598 "anycast\0""scope\0""dev\0""label\0""local\0";
599 struct rtnl_handle rth;
600 struct {
601 struct nlmsghdr n;
602 struct ifaddrmsg ifa;
603 char buf[256];
604 } req;
605 char *d = NULL;
606 char *l = NULL;
607 inet_prefix lcl;
608 inet_prefix peer;
609 int local_len = 0;
610 int peer_len = 0;
611 int brd_len = 0;
612 int any_len = 0;
613 bool scoped = 0;
614
615 memset(&req, 0, sizeof(req));
616
617 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
618 req.n.nlmsg_flags = NLM_F_REQUEST | flags;
619 req.n.nlmsg_type = cmd;
620 req.ifa.ifa_family = preferred_family;
621
622 while (*argv) {
623 unsigned arg = index_in_strings(option, *argv);
624 /* if search fails, "local" is assumed */
625 if ((int)arg >= 0)
626 NEXT_ARG();
627
628 if (arg <= 1) { /* peer, remote */
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 if (brd_len) {
642 duparg("broadcast", *argv);
643 }
644 if (LONE_CHAR(*argv, '+')) {
645 brd_len = -1;
646 } else if (LONE_DASH(*argv)) {
647 brd_len = -2;
648 } else {
649 get_addr(&addr, *argv, req.ifa.ifa_family);
650 if (req.ifa.ifa_family == AF_UNSPEC)
651 req.ifa.ifa_family = addr.family;
652 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
653 brd_len = addr.bytelen;
654 }
655 } else if (arg == 4) { /* anycast */
656 inet_prefix addr;
657 if (any_len) {
658 duparg("anycast", *argv);
659 }
660 get_addr(&addr, *argv, req.ifa.ifa_family);
661 if (req.ifa.ifa_family == AF_UNSPEC) {
662 req.ifa.ifa_family = addr.family;
663 }
664 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
665 any_len = addr.bytelen;
666 } else if (arg == 5) { /* scope */
667 uint32_t scope = 0;
668 if (rtnl_rtscope_a2n(&scope, *argv)) {
669 invarg_1_to_2(*argv, "scope");
670 }
671 req.ifa.ifa_scope = scope;
672 scoped = 1;
673 } else if (arg == 6) { /* dev */
674 d = *argv;
675 } else if (arg == 7) { /* label */
676 l = *argv;
677 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
678 } else {
679 /* local (specified or assumed) */
680 if (local_len) {
681 duparg2("local", *argv);
682 }
683 get_prefix(&lcl, *argv, req.ifa.ifa_family);
684 if (req.ifa.ifa_family == AF_UNSPEC) {
685 req.ifa.ifa_family = lcl.family;
686 }
687 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
688 local_len = lcl.bytelen;
689 }
690 argv++;
691 }
692
693 if (!d) {
694 /* There was no "dev IFACE", but we need that */
695 bb_error_msg_and_die("need \"dev IFACE\"");
696 }
697 if (l && !is_prefixed_with(l, d)) {
698 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
699 }
700
701 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
702 peer = lcl;
703 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
704 }
705 if (req.ifa.ifa_prefixlen == 0)
706 req.ifa.ifa_prefixlen = lcl.bitlen;
707
708 if (brd_len < 0 && cmd != RTM_DELADDR) {
709 inet_prefix brd;
710 int i;
711 if (req.ifa.ifa_family != AF_INET) {
712 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
713 }
714 brd = peer;
715 if (brd.bitlen <= 30) {
716 for (i = 31; i >= brd.bitlen; i--) {
717 if (brd_len == -1)
718 brd.data[0] |= htonl(1<<(31-i));
719 else
720 brd.data[0] &= ~htonl(1<<(31-i));
721 }
722 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
723 brd_len = brd.bytelen;
724 }
725 }
726 if (!scoped && cmd != RTM_DELADDR)
727 req.ifa.ifa_scope = default_scope(&lcl);
728
729 xrtnl_open(&rth);
730
731 ll_init_map(&rth);
732
733 req.ifa.ifa_index = xll_name_to_index(d);
734
735 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
736 return 2;
737
738 return 0;
739 }
740
741 /* Return value becomes exitcode. It's okay to not return at all */
do_ipaddr(char ** argv)742 int FAST_FUNC do_ipaddr(char **argv)
743 {
744 static const char commands[] ALIGN1 =
745 /* 0 1 2 3 4 5 6 7 8 */
746 "add\0""change\0""chg\0""replace\0""delete\0""list\0""show\0""lst\0""flush\0";
747 int cmd = 2;
748
749 INIT_G();
750
751 if (*argv) {
752 cmd = index_in_substrings(commands, *argv);
753 if (cmd < 0)
754 invarg_1_to_2(*argv, applet_name);
755 argv++;
756 if (cmd <= 4) {
757 return ipaddr_modify(
758 /*cmd:*/ cmd == 4 ? RTM_DELADDR : RTM_NEWADDR,
759 /*flags:*/
760 cmd == 0 ? NLM_F_CREATE|NLM_F_EXCL : /* add */
761 cmd == 1 || cmd == 2 ? NLM_F_REPLACE : /* change */
762 cmd == 3 ? NLM_F_CREATE|NLM_F_REPLACE : /* replace */
763 0 /* delete */
764 , argv);
765 }
766 }
767 return ipaddr_list_or_flush(argv, cmd == 8);
768 }
769