1 /* vi: set sw=4 ts=4: */
3 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
8 * Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated
13 #include <net/if_arp.h>
15 #include "ip_common.h" /* #include "libbb.h" is inside */
21 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
27 struct rtnl_handle *rth;
40 typedef struct filter_t filter_t;
42 #define G_filter (*(filter_t*)&bb_common_bufsiz1)
45 static void print_link_flags(unsigned flags, unsigned mdown)
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";
55 if (flags & IFF_UP && !(flags & IFF_RUNNING))
56 printf("NO-CARRIER,");
57 flags &= ~IFF_RUNNING;
69 flags = print_flags_separated(flag_masks, flag_labels, flags, ",");
77 static void print_queuelen(char *name)
82 s = socket(AF_INET, SOCK_STREAM, 0);
86 memset(&ifr, 0, sizeof(ifr));
87 strncpy_IFNAMSIZ(ifr.ifr_name, name);
88 if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) {
95 printf("qlen %d", ifr.ifr_qlen);
98 static NOINLINE int print_linkinfo(const struct nlmsghdr *n)
100 struct ifinfomsg *ifi = NLMSG_DATA(n);
101 struct rtattr *tb[IFLA_MAX+1];
102 int len = n->nlmsg_len;
104 if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
107 len -= NLMSG_LENGTH(sizeof(*ifi));
111 if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
113 if (G_filter.up && !(ifi->ifi_flags & IFF_UP))
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");
123 && (!G_filter.family || G_filter.family == AF_PACKET)
124 && fnmatch(G_filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0)
129 if (n->nlmsg_type == RTM_DELLINK)
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])
141 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
145 printf("@%s: ", ll_idx_n2a(iflink, b1));
146 m_flag = ll_index_to_flags(iflink);
147 m_flag = !(m_flag & IFF_UP);
152 print_link_flags(ifi->ifi_flags, m_flag);
156 printf("mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
158 printf("qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
160 if (tb[IFLA_MASTER]) {
162 printf("master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
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])));
172 if (G_filter.showqueue)
173 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
175 if (!G_filter.family || G_filter.family == AF_PACKET) {
177 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
179 if (tb[IFLA_ADDRESS]) {
180 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
181 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
183 b1, sizeof(b1)), stdout);
185 if (tb[IFLA_BROADCAST]) {
186 if (ifi->ifi_flags & IFF_POINTOPOINT)
190 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
191 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
193 b1, sizeof(b1)), stdout);
201 static int flush_update(void)
203 if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
204 bb_perror_msg("can't send flush request");
211 static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
212 struct nlmsghdr *n, void *arg UNUSED_PARAM)
214 struct ifaddrmsg *ifa = NLMSG_DATA(n);
215 int len = n->nlmsg_len;
216 struct rtattr * rta_tb[IFA_MAX+1];
220 if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
222 len -= NLMSG_LENGTH(sizeof(*ifa));
224 bb_error_msg("wrong nlmsg len %d", len);
228 if (G_filter.flushb && n->nlmsg_type != RTM_NEWADDR)
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)));
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];
239 if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
241 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
243 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
245 if (G_filter.label) {
247 if (rta_tb[IFA_LABEL])
248 label = RTA_DATA(rta_tb[IFA_LABEL]);
250 label = ll_idx_n2a(ifa->ifa_index, b1);
251 if (fnmatch(G_filter.label, label, 0) != 0)
254 if (G_filter.pfx.family) {
255 if (rta_tb[IFA_LOCAL]) {
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))
265 if (G_filter.flushb) {
267 if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
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;
281 if (n->nlmsg_type == RTM_DELADDR)
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)
288 else if (ifa->ifa_family == AF_INET6)
291 printf(" family %d ", ifa->ifa_family);
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);
298 if (rta_tb[IFA_ADDRESS] == NULL
299 || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
301 printf("/%d ", ifa->ifa_prefixlen);
303 printf(" peer %s/%d ",
304 rt_addr_n2a(ifa->ifa_family,
305 RTA_DATA(rta_tb[IFA_ADDRESS]),
311 if (rta_tb[IFA_BROADCAST]) {
313 rt_addr_n2a(ifa->ifa_family,
314 RTA_DATA(rta_tb[IFA_BROADCAST]),
315 abuf, sizeof(abuf)));
317 if (rta_tb[IFA_ANYCAST]) {
319 rt_addr_n2a(ifa->ifa_family,
320 RTA_DATA(rta_tb[IFA_ANYCAST]),
321 abuf, sizeof(abuf)));
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 ");
328 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
329 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
330 printf("tentative ");
332 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
333 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
334 printf("deprecated ");
336 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
339 ifa->ifa_flags &= ~IFA_F_PERMANENT;
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]);
348 if (ci->ifa_valid == 0xFFFFFFFFU)
349 sprintf(buf, "valid_lft forever");
351 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
352 if (ci->ifa_prefered == 0xFFFFFFFFU)
353 sprintf(buf+strlen(buf), " preferred_lft forever");
355 sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
365 struct nlmsg_list *next;
369 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
371 for (; ainfo; ainfo = ainfo->next) {
372 struct nlmsghdr *n = &ainfo->h;
373 struct ifaddrmsg *ifa = NLMSG_DATA(n);
375 if (n->nlmsg_type != RTM_NEWADDR)
377 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
379 if (ifa->ifa_index != ifindex
380 || (G_filter.family && G_filter.family != ifa->ifa_family)
384 print_addrinfo(NULL, n, NULL);
390 static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
392 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
393 struct nlmsg_list *h;
394 struct nlmsg_list **lp;
396 h = xzalloc(n->nlmsg_len + sizeof(void*));
398 memcpy(&h->h, n, n->nlmsg_len);
399 /*h->next = NULL; - xzalloc did it */
401 for (lp = linfo; *lp; lp = &(*lp)->next)
405 ll_remember_index(who, n, NULL);
409 static void ipaddr_reset_filter(int _oneline)
411 memset(&G_filter, 0, sizeof(G_filter));
412 G_filter.oneline = _oneline;
415 /* Return value becomes exitcode. It's okay to not return at all */
416 int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
418 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
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;
427 ipaddr_reset_filter(oneline);
428 G_filter.showqueue = 1;
430 if (G_filter.family == AF_UNSPEC)
431 G_filter.family = preferred_family;
435 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
437 if (G_filter.family == AF_PACKET) {
438 bb_error_msg_and_die("can't flush link addresses");
443 const smalluint key = index_in_strings(option, *argv);
444 if (key == 0) { /* to */
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;
450 } else if (key == 1) { /* scope */
453 G_filter.scopemask = -1;
454 if (rtnl_rtscope_a2n(&scope, *argv)) {
455 if (strcmp(*argv, "all") != 0) {
456 invarg(*argv, "scope");
458 scope = RT_SCOPE_NOWHERE;
459 G_filter.scopemask = 0;
461 G_filter.scope = scope;
462 } else if (key == 2) { /* up */
464 } else if (key == 3) { /* label */
466 G_filter.label = *argv;
468 if (key == 4) /* dev */
471 duparg2("dev", *argv);
479 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
480 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
483 G_filter.ifindex = xll_name_to_index(filter_dev);
487 char flushb[4096-512];
489 G_filter.flushb = flushb;
491 G_filter.flushe = sizeof(flushb);
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) {
501 if (flush_update() < 0) {
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);
513 if (G_filter.family && G_filter.family != AF_PACKET) {
514 struct nlmsg_list **lp;
517 if (G_filter.oneline)
520 while ((l = *lp) != NULL) {
522 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
523 struct nlmsg_list *a;
525 for (a = ainfo; a; a = a->next) {
526 struct nlmsghdr *n = &a->h;
527 struct ifaddrmsg *ifa = NLMSG_DATA(n);
529 if (ifa->ifa_index != ifi->ifi_index
530 || (G_filter.family && G_filter.family != ifa->ifa_family)
534 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
536 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
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));
543 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
545 if (G_filter.pfx.family && tb[IFA_LOCAL]) {
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))
553 if (G_filter.label) {
557 label = RTA_DATA(tb[IFA_LABEL]);
559 label = ll_idx_n2a(ifa->ifa_index, b1);
560 if (fnmatch(G_filter.label, label, 0) != 0)
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);
586 static int default_scope(inet_prefix *lcl)
588 if (lcl->family == AF_INET) {
589 if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
590 return RT_SCOPE_HOST;
595 /* Return value becomes exitcode. It's okay to not return at all */
596 static int ipaddr_modify(int cmd, char **argv)
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;
604 struct ifaddrmsg ifa;
617 memset(&req, 0, sizeof(req));
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;
625 const smalluint arg = index_in_strings(option, *argv);
626 if (arg <= 1) { /* peer, remote */
630 duparg("peer", *argv);
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;
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 */
643 duparg("broadcast", *argv);
645 if (LONE_CHAR(*argv, '+')) {
647 } else if (LONE_DASH(*argv)) {
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;
656 } else if (arg == 4) { /* anycast */
660 duparg("anycast", *argv);
662 get_addr(&addr, *argv, req.ifa.ifa_family);
663 if (req.ifa.ifa_family == AF_UNSPEC) {
664 req.ifa.ifa_family = addr.family;
666 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
667 any_len = addr.bytelen;
668 } else if (arg == 5) { /* scope */
671 if (rtnl_rtscope_a2n(&scope, *argv)) {
672 invarg(*argv, "scope");
674 req.ifa.ifa_scope = scope;
676 } else if (arg == 6) { /* dev */
679 } else if (arg == 7) { /* label */
682 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
684 if (arg == 8) /* local */
687 duparg2("local", *argv);
689 get_prefix(&lcl, *argv, req.ifa.ifa_family);
690 if (req.ifa.ifa_family == AF_UNSPEC) {
691 req.ifa.ifa_family = lcl.family;
693 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
694 local_len = lcl.bytelen;
700 /* There was no "dev IFACE", but we need that */
701 bb_error_msg_and_die("need \"dev IFACE\"");
703 if (l && strncmp(d, l, strlen(d)) != 0) {
704 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
707 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
709 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
711 if (req.ifa.ifa_prefixlen == 0)
712 req.ifa.ifa_prefixlen = lcl.bitlen;
714 if (brd_len < 0 && cmd != RTM_DELADDR) {
717 if (req.ifa.ifa_family != AF_INET) {
718 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
721 if (brd.bitlen <= 30) {
722 for (i=31; i>=brd.bitlen; i--) {
724 brd.data[0] |= htonl(1<<(31-i));
726 brd.data[0] &= ~htonl(1<<(31-i));
728 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
729 brd_len = brd.bytelen;
732 if (!scoped && cmd != RTM_DELADDR)
733 req.ifa.ifa_scope = default_scope(&lcl);
739 req.ifa.ifa_index = xll_name_to_index(d);
741 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
747 /* Return value becomes exitcode. It's okay to not return at all */
748 int FAST_FUNC do_ipaddr(char **argv)
750 static const char commands[] ALIGN1 =
751 "add\0""delete\0""list\0""show\0""lst\0""flush\0";
754 cmd = index_in_substrings(commands, *argv);
756 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
759 return ipaddr_modify((cmd == 0) ? RTM_NEWADDR : RTM_DELADDR, argv);
761 /* 2 == list, 3 == show, 4 == lst */
762 return ipaddr_list_or_flush(argv, cmd == 5);