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 /* IFLA_OPERSTATE was added to kernel with the same commit as 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])));
175 if (G_filter.showqueue)
176 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
178 if (!G_filter.family || G_filter.family == AF_PACKET) {
180 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
182 if (tb[IFLA_ADDRESS]) {
183 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
184 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
186 b1, sizeof(b1)), stdout);
188 if (tb[IFLA_BROADCAST]) {
189 if (ifi->ifi_flags & IFF_POINTOPOINT)
193 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
194 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
196 b1, sizeof(b1)), stdout);
204 static int flush_update(void)
206 if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
207 bb_perror_msg("can't send flush request");
214 static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
215 struct nlmsghdr *n, void *arg UNUSED_PARAM)
217 struct ifaddrmsg *ifa = NLMSG_DATA(n);
218 int len = n->nlmsg_len;
219 struct rtattr * rta_tb[IFA_MAX+1];
223 if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
225 len -= NLMSG_LENGTH(sizeof(*ifa));
227 bb_error_msg("wrong nlmsg len %d", len);
231 if (G_filter.flushb && n->nlmsg_type != RTM_NEWADDR)
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)));
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];
242 if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
244 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
246 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
248 if (G_filter.label) {
250 if (rta_tb[IFA_LABEL])
251 label = RTA_DATA(rta_tb[IFA_LABEL]);
253 label = ll_idx_n2a(ifa->ifa_index, b1);
254 if (fnmatch(G_filter.label, label, 0) != 0)
257 if (G_filter.pfx.family) {
258 if (rta_tb[IFA_LOCAL]) {
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))
268 if (G_filter.flushb) {
270 if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
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;
284 if (n->nlmsg_type == RTM_DELADDR)
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)
291 else if (ifa->ifa_family == AF_INET6)
294 printf(" family %d ", ifa->ifa_family);
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);
301 if (rta_tb[IFA_ADDRESS] == NULL
302 || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
304 printf("/%d ", ifa->ifa_prefixlen);
306 printf(" peer %s/%d ",
307 rt_addr_n2a(ifa->ifa_family,
308 RTA_DATA(rta_tb[IFA_ADDRESS]),
314 if (rta_tb[IFA_BROADCAST]) {
316 rt_addr_n2a(ifa->ifa_family,
317 RTA_DATA(rta_tb[IFA_BROADCAST]),
321 if (rta_tb[IFA_ANYCAST]) {
323 rt_addr_n2a(ifa->ifa_family,
324 RTA_DATA(rta_tb[IFA_ANYCAST]),
328 printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1));
329 if (ifa->ifa_flags & IFA_F_SECONDARY) {
330 ifa->ifa_flags &= ~IFA_F_SECONDARY;
331 printf("secondary ");
333 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
334 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
335 printf("tentative ");
337 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
338 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
339 printf("deprecated ");
341 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
344 ifa->ifa_flags &= ~IFA_F_PERMANENT;
346 printf("flags %02x ", ifa->ifa_flags);
347 if (rta_tb[IFA_LABEL])
348 fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
349 if (rta_tb[IFA_CACHEINFO]) {
350 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
353 if (ci->ifa_valid == 0xFFFFFFFFU)
354 sprintf(buf, "valid_lft forever");
356 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
357 if (ci->ifa_prefered == 0xFFFFFFFFU)
358 sprintf(buf+strlen(buf), " preferred_lft forever");
360 sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
370 struct nlmsg_list *next;
374 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
376 for (; ainfo; ainfo = ainfo->next) {
377 struct nlmsghdr *n = &ainfo->h;
378 struct ifaddrmsg *ifa = NLMSG_DATA(n);
380 if (n->nlmsg_type != RTM_NEWADDR)
382 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
384 if (ifa->ifa_index != ifindex
385 || (G_filter.family && G_filter.family != ifa->ifa_family)
389 print_addrinfo(NULL, n, NULL);
395 static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
397 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
398 struct nlmsg_list *h;
399 struct nlmsg_list **lp;
401 h = xzalloc(n->nlmsg_len + sizeof(void*));
403 memcpy(&h->h, n, n->nlmsg_len);
404 /*h->next = NULL; - xzalloc did it */
406 for (lp = linfo; *lp; lp = &(*lp)->next)
410 ll_remember_index(who, n, NULL);
414 static void ipaddr_reset_filter(int _oneline)
416 memset(&G_filter, 0, sizeof(G_filter));
417 G_filter.oneline = _oneline;
420 /* Return value becomes exitcode. It's okay to not return at all */
421 int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
423 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
425 struct nlmsg_list *linfo = NULL;
426 struct nlmsg_list *ainfo = NULL;
427 struct nlmsg_list *l;
428 struct rtnl_handle rth;
429 char *filter_dev = NULL;
432 ipaddr_reset_filter(oneline);
433 G_filter.showqueue = 1;
435 if (G_filter.family == AF_UNSPEC)
436 G_filter.family = preferred_family;
440 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
442 if (G_filter.family == AF_PACKET) {
443 bb_error_msg_and_die("can't flush link addresses");
448 const smalluint key = index_in_strings(option, *argv);
449 if (key == 0) { /* to */
451 get_prefix(&G_filter.pfx, *argv, G_filter.family);
452 if (G_filter.family == AF_UNSPEC) {
453 G_filter.family = G_filter.pfx.family;
455 } else if (key == 1) { /* scope */
458 G_filter.scopemask = -1;
459 if (rtnl_rtscope_a2n(&scope, *argv)) {
460 if (strcmp(*argv, "all") != 0) {
461 invarg(*argv, "scope");
463 scope = RT_SCOPE_NOWHERE;
464 G_filter.scopemask = 0;
466 G_filter.scope = scope;
467 } else if (key == 2) { /* up */
469 } else if (key == 3) { /* label */
471 G_filter.label = *argv;
473 if (key == 4) /* dev */
476 duparg2("dev", *argv);
484 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
485 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
488 G_filter.ifindex = xll_name_to_index(filter_dev);
492 char flushb[4096-512];
494 G_filter.flushb = flushb;
496 G_filter.flushe = sizeof(flushb);
500 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
501 G_filter.flushed = 0;
502 xrtnl_dump_filter(&rth, print_addrinfo, NULL);
503 if (G_filter.flushed == 0) {
506 if (flush_update() < 0) {
512 if (G_filter.family != AF_PACKET) {
513 xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
514 xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
518 if (G_filter.family && G_filter.family != AF_PACKET) {
519 struct nlmsg_list **lp;
522 if (G_filter.oneline)
525 while ((l = *lp) != NULL) {
527 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
528 struct nlmsg_list *a;
530 for (a = ainfo; a; a = a->next) {
531 struct nlmsghdr *n = &a->h;
532 struct ifaddrmsg *ifa = NLMSG_DATA(n);
534 if (ifa->ifa_index != ifi->ifi_index
535 || (G_filter.family && G_filter.family != ifa->ifa_family)
539 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
541 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
543 if (G_filter.pfx.family || G_filter.label) {
544 struct rtattr *tb[IFA_MAX+1];
545 memset(tb, 0, sizeof(tb));
546 parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
548 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
550 if (G_filter.pfx.family && tb[IFA_LOCAL]) {
552 memset(&dst, 0, sizeof(dst));
553 dst.family = ifa->ifa_family;
554 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
555 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
558 if (G_filter.label) {
562 label = RTA_DATA(tb[IFA_LABEL]);
564 label = ll_idx_n2a(ifa->ifa_index, b1);
565 if (fnmatch(G_filter.label, label, 0) != 0)
580 for (l = linfo; l; l = l->next) {
581 if (no_link || print_linkinfo(&l->h) == 0) {
582 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
583 if (G_filter.family != AF_PACKET)
584 print_selected_addrinfo(ifi->ifi_index, ainfo);
591 static int default_scope(inet_prefix *lcl)
593 if (lcl->family == AF_INET) {
594 if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
595 return RT_SCOPE_HOST;
600 /* Return value becomes exitcode. It's okay to not return at all */
601 static int ipaddr_modify(int cmd, char **argv)
603 static const char option[] ALIGN1 =
604 "peer\0""remote\0""broadcast\0""brd\0"
605 "anycast\0""scope\0""dev\0""label\0""local\0";
606 struct rtnl_handle rth;
609 struct ifaddrmsg ifa;
622 memset(&req, 0, sizeof(req));
624 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
625 req.n.nlmsg_flags = NLM_F_REQUEST;
626 req.n.nlmsg_type = cmd;
627 req.ifa.ifa_family = preferred_family;
630 unsigned arg = index_in_strings(option, *argv);
631 /* if search fails, "local" is assumed */
635 if (arg <= 1) { /* peer, remote */
637 duparg("peer", *argv);
639 get_prefix(&peer, *argv, req.ifa.ifa_family);
640 peer_len = peer.bytelen;
641 if (req.ifa.ifa_family == AF_UNSPEC) {
642 req.ifa.ifa_family = peer.family;
644 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
645 req.ifa.ifa_prefixlen = peer.bitlen;
646 } else if (arg <= 3) { /* broadcast, brd */
649 duparg("broadcast", *argv);
651 if (LONE_CHAR(*argv, '+')) {
653 } else if (LONE_DASH(*argv)) {
656 get_addr(&addr, *argv, req.ifa.ifa_family);
657 if (req.ifa.ifa_family == AF_UNSPEC)
658 req.ifa.ifa_family = addr.family;
659 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
660 brd_len = addr.bytelen;
662 } else if (arg == 4) { /* anycast */
665 duparg("anycast", *argv);
667 get_addr(&addr, *argv, req.ifa.ifa_family);
668 if (req.ifa.ifa_family == AF_UNSPEC) {
669 req.ifa.ifa_family = addr.family;
671 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
672 any_len = addr.bytelen;
673 } else if (arg == 5) { /* scope */
675 if (rtnl_rtscope_a2n(&scope, *argv)) {
676 invarg(*argv, "scope");
678 req.ifa.ifa_scope = scope;
680 } else if (arg == 6) { /* dev */
682 } else if (arg == 7) { /* label */
684 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
686 /* local (specified or assumed) */
688 duparg2("local", *argv);
690 get_prefix(&lcl, *argv, req.ifa.ifa_family);
691 if (req.ifa.ifa_family == AF_UNSPEC) {
692 req.ifa.ifa_family = lcl.family;
694 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
695 local_len = lcl.bytelen;
701 /* There was no "dev IFACE", but we need that */
702 bb_error_msg_and_die("need \"dev IFACE\"");
704 if (l && strncmp(d, l, strlen(d)) != 0) {
705 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
708 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
710 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
712 if (req.ifa.ifa_prefixlen == 0)
713 req.ifa.ifa_prefixlen = lcl.bitlen;
715 if (brd_len < 0 && cmd != RTM_DELADDR) {
718 if (req.ifa.ifa_family != AF_INET) {
719 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
722 if (brd.bitlen <= 30) {
723 for (i = 31; i >= brd.bitlen; i--) {
725 brd.data[0] |= htonl(1<<(31-i));
727 brd.data[0] &= ~htonl(1<<(31-i));
729 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
730 brd_len = brd.bytelen;
733 if (!scoped && cmd != RTM_DELADDR)
734 req.ifa.ifa_scope = default_scope(&lcl);
740 req.ifa.ifa_index = xll_name_to_index(d);
742 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
748 /* Return value becomes exitcode. It's okay to not return at all */
749 int FAST_FUNC do_ipaddr(char **argv)
751 static const char commands[] ALIGN1 =
752 "add\0""delete\0""list\0""show\0""lst\0""flush\0";
755 cmd = index_in_substrings(commands, *argv);
757 invarg(*argv, applet_name);
760 return ipaddr_modify((cmd == 0) ? RTM_NEWADDR : RTM_DELADDR, argv);
762 /* 2 == list, 3 == show, 4 == lst */
763 return ipaddr_list_or_flush(argv, cmd == 5);