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 */
16 #include "common_bufsiz.h"
22 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
28 struct rtnl_handle *rth;
41 typedef struct filter_t filter_t;
43 #define G_filter (*(filter_t*)bb_common_bufsiz1)
46 static void print_link_flags(unsigned flags, unsigned mdown)
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";
56 if (flags & IFF_UP && !(flags & IFF_RUNNING))
57 printf("NO-CARRIER,");
58 flags &= ~IFF_RUNNING;
70 flags = print_flags_separated(flag_masks, flag_labels, flags, ",");
78 static void print_queuelen(char *name)
83 s = socket(AF_INET, SOCK_STREAM, 0);
87 memset(&ifr, 0, sizeof(ifr));
88 strncpy_IFNAMSIZ(ifr.ifr_name, name);
89 if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) {
96 printf("qlen %d", ifr.ifr_qlen);
99 static NOINLINE int print_linkinfo(const struct nlmsghdr *n)
101 struct ifinfomsg *ifi = NLMSG_DATA(n);
102 struct rtattr *tb[IFLA_MAX+1];
103 int len = n->nlmsg_len;
105 if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
108 len -= NLMSG_LENGTH(sizeof(*ifi));
112 if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
114 if (G_filter.up && !(ifi->ifi_flags & IFF_UP))
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");
124 && (!G_filter.family || G_filter.family == AF_PACKET)
125 && fnmatch(G_filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0)
130 if (n->nlmsg_type == RTM_DELLINK)
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])
141 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
145 printf("@%s: ", ll_index_to_name(iflink));
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]) {
161 printf("master %s ", ll_index_to_name(*(int*)RTA_DATA(tb[IFLA_MASTER])));
164 /* IFLA_OPERSTATE was added to kernel with the same commit as 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])));
174 if (G_filter.showqueue)
175 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
177 if (!G_filter.family || G_filter.family == AF_PACKET) {
179 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
181 if (tb[IFLA_ADDRESS]) {
182 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
183 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
185 b1, sizeof(b1)), stdout);
187 if (tb[IFLA_BROADCAST]) {
188 if (ifi->ifi_flags & IFF_POINTOPOINT)
192 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
193 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
195 b1, sizeof(b1)), stdout);
203 static int flush_update(void)
205 if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
206 bb_perror_msg("can't send flush request");
213 static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
214 struct nlmsghdr *n, void *arg UNUSED_PARAM)
216 struct ifaddrmsg *ifa = NLMSG_DATA(n);
217 int len = n->nlmsg_len;
218 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_index_to_name(ifa->ifa_index);
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, RTA_DATA(rta_tb[IFA_LOCAL])),
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, RTA_DATA(rta_tb[IFA_ADDRESS])),
310 if (rta_tb[IFA_BROADCAST]) {
312 rt_addr_n2a(ifa->ifa_family,
313 RTA_DATA(rta_tb[IFA_BROADCAST]))
316 if (rta_tb[IFA_ANYCAST]) {
318 rt_addr_n2a(ifa->ifa_family,
319 RTA_DATA(rta_tb[IFA_ANYCAST]))
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 ");
327 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
328 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
329 printf("tentative ");
331 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
332 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
333 printf("deprecated ");
335 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
338 ifa->ifa_flags &= ~IFA_F_PERMANENT;
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]);
347 if (ci->ifa_valid == 0xFFFFFFFFU)
348 sprintf(buf, "valid_lft forever");
350 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
351 if (ci->ifa_prefered == 0xFFFFFFFFU)
352 sprintf(buf+strlen(buf), " preferred_lft forever");
354 sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
364 struct nlmsg_list *next;
368 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
370 for (; ainfo; ainfo = ainfo->next) {
371 struct nlmsghdr *n = &ainfo->h;
372 struct ifaddrmsg *ifa = NLMSG_DATA(n);
374 if (n->nlmsg_type != RTM_NEWADDR)
376 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
378 if (ifa->ifa_index != ifindex
379 || (G_filter.family && G_filter.family != ifa->ifa_family)
383 print_addrinfo(NULL, n, NULL);
389 static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
391 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
392 struct nlmsg_list *h;
393 struct nlmsg_list **lp;
395 h = xzalloc(n->nlmsg_len + sizeof(void*));
397 memcpy(&h->h, n, n->nlmsg_len);
398 /*h->next = NULL; - xzalloc did it */
400 for (lp = linfo; *lp; lp = &(*lp)->next)
404 ll_remember_index(who, n, NULL);
408 static void ipaddr_reset_filter(int _oneline)
410 memset(&G_filter, 0, sizeof(G_filter));
411 G_filter.oneline = _oneline;
414 /* Return value becomes exitcode. It's okay to not return at all */
415 int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
417 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
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;
426 ipaddr_reset_filter(oneline);
427 G_filter.showqueue = 1;
429 if (G_filter.family == AF_UNSPEC)
430 G_filter.family = preferred_family;
434 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
436 if (G_filter.family == AF_PACKET) {
437 bb_error_msg_and_die("can't flush link addresses");
442 const smalluint key = index_in_strings(option, *argv);
443 if (key == 0) { /* to */
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;
449 } else if (key == 1) { /* scope */
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");
457 scope = RT_SCOPE_NOWHERE;
458 G_filter.scopemask = 0;
460 G_filter.scope = scope;
461 } else if (key == 2) { /* up */
463 } else if (key == 3) { /* label */
465 G_filter.label = *argv;
467 if (key == 4) /* dev */
470 duparg2("dev", *argv);
478 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
479 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
482 G_filter.ifindex = xll_name_to_index(filter_dev);
486 char flushb[4096-512];
488 G_filter.flushb = flushb;
490 G_filter.flushe = sizeof(flushb);
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) {
500 if (flush_update() < 0) {
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);
512 if (G_filter.family && G_filter.family != AF_PACKET) {
513 struct nlmsg_list **lp;
516 if (G_filter.oneline)
519 while ((l = *lp) != NULL) {
521 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
522 struct nlmsg_list *a;
524 for (a = ainfo; a; a = a->next) {
525 struct nlmsghdr *n = &a->h;
526 struct ifaddrmsg *ifa = NLMSG_DATA(n);
528 if (ifa->ifa_index != ifi->ifi_index
529 || (G_filter.family && G_filter.family != ifa->ifa_family)
533 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
535 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
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));
542 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
544 if (G_filter.pfx.family && tb[IFA_LOCAL]) {
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))
552 if (G_filter.label) {
555 label = RTA_DATA(tb[IFA_LABEL]);
557 label = ll_index_to_name(ifa->ifa_index);
558 if (fnmatch(G_filter.label, label, 0) != 0)
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);
584 static int default_scope(inet_prefix *lcl)
586 if (lcl->family == AF_INET) {
587 if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
588 return RT_SCOPE_HOST;
593 /* Return value becomes exitcode. It's okay to not return at all */
594 static int ipaddr_modify(int cmd, int flags, char **argv)
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;
602 struct ifaddrmsg ifa;
615 memset(&req, 0, sizeof(req));
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;
623 unsigned arg = index_in_strings(option, *argv);
624 /* if search fails, "local" is assumed */
628 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 */
642 duparg("broadcast", *argv);
644 if (LONE_CHAR(*argv, '+')) {
646 } else if (LONE_DASH(*argv)) {
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;
655 } else if (arg == 4) { /* anycast */
658 duparg("anycast", *argv);
660 get_addr(&addr, *argv, req.ifa.ifa_family);
661 if (req.ifa.ifa_family == AF_UNSPEC) {
662 req.ifa.ifa_family = addr.family;
664 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
665 any_len = addr.bytelen;
666 } else if (arg == 5) { /* scope */
668 if (rtnl_rtscope_a2n(&scope, *argv)) {
669 invarg_1_to_2(*argv, "scope");
671 req.ifa.ifa_scope = scope;
673 } else if (arg == 6) { /* dev */
675 } else if (arg == 7) { /* label */
677 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
679 /* local (specified or assumed) */
681 duparg2("local", *argv);
683 get_prefix(&lcl, *argv, req.ifa.ifa_family);
684 if (req.ifa.ifa_family == AF_UNSPEC) {
685 req.ifa.ifa_family = lcl.family;
687 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
688 local_len = lcl.bytelen;
694 /* There was no "dev IFACE", but we need that */
695 bb_error_msg_and_die("need \"dev IFACE\"");
697 if (l && !is_prefixed_with(l, d)) {
698 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
701 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
703 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
705 if (req.ifa.ifa_prefixlen == 0)
706 req.ifa.ifa_prefixlen = lcl.bitlen;
708 if (brd_len < 0 && cmd != RTM_DELADDR) {
711 if (req.ifa.ifa_family != AF_INET) {
712 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
715 if (brd.bitlen <= 30) {
716 for (i = 31; i >= brd.bitlen; i--) {
718 brd.data[0] |= htonl(1<<(31-i));
720 brd.data[0] &= ~htonl(1<<(31-i));
722 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
723 brd_len = brd.bytelen;
726 if (!scoped && cmd != RTM_DELADDR)
727 req.ifa.ifa_scope = default_scope(&lcl);
733 req.ifa.ifa_index = xll_name_to_index(d);
735 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
741 /* Return value becomes exitcode. It's okay to not return at all */
742 int FAST_FUNC do_ipaddr(char **argv)
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";
749 cmd = index_in_substrings(commands, *argv);
751 invarg_1_to_2(*argv, applet_name);
754 return ipaddr_modify(
755 /*cmd:*/ cmd == 4 ? RTM_DELADDR : RTM_NEWADDR,
757 cmd == 0 ? NLM_F_CREATE|NLM_F_EXCL : /* add */
758 cmd == 1 || cmd == 2 ? NLM_F_REPLACE : /* change */
759 cmd == 3 ? NLM_F_CREATE|NLM_F_REPLACE : /* replace */
764 return ipaddr_list_or_flush(argv, cmd == 8);