1 /* vi: set sw=4 ts=4: */
3 * ipaddress.c "ip address".
5 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
7 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated
15 #include <net/if_arp.h>
17 #include "ip_common.h" /* #include "libbb.h" is inside */
23 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up*/
26 typedef struct filter_t {
29 struct rtnl_handle *rth;
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 flags &= ~IFF_RUNNING;
68 flags = print_flags_separated(flag_masks, flag_labels, flags, ",");
76 static void print_queuelen(char *name)
81 s = socket(AF_INET, SOCK_STREAM, 0);
85 memset(&ifr, 0, sizeof(ifr));
86 strncpy_IFNAMSIZ(ifr.ifr_name, name);
87 if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) {
94 printf("qlen %d", ifr.ifr_qlen);
97 static NOINLINE int print_linkinfo(const struct nlmsghdr *n)
99 struct ifinfomsg *ifi = NLMSG_DATA(n);
100 struct rtattr *tb[IFLA_MAX+1];
101 int len = n->nlmsg_len;
103 if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
106 len -= NLMSG_LENGTH(sizeof(*ifi));
110 if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
112 if (G_filter.up && !(ifi->ifi_flags & IFF_UP))
115 memset(tb, 0, sizeof(tb));
116 parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
117 if (tb[IFLA_IFNAME] == NULL) {
118 bb_error_msg("nil ifname");
122 && (!G_filter.family || G_filter.family == AF_PACKET)
123 && fnmatch(G_filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0)
128 if (n->nlmsg_type == RTM_DELLINK)
131 printf("%d: %s", ifi->ifi_index,
132 /*tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>" - we checked tb[IFLA_IFNAME] above*/
133 (char*)RTA_DATA(tb[IFLA_IFNAME])
140 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
144 printf("@%s: ", ll_idx_n2a(iflink, b1));
145 m_flag = ll_index_to_flags(iflink);
146 m_flag = !(m_flag & IFF_UP);
151 print_link_flags(ifi->ifi_flags, m_flag);
155 printf("mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
157 printf("qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
159 if (tb[IFLA_MASTER]) {
161 printf("master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
164 if (G_filter.showqueue)
165 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
167 if (!G_filter.family || G_filter.family == AF_PACKET) {
169 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
171 if (tb[IFLA_ADDRESS]) {
172 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
173 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
175 b1, sizeof(b1)), stdout);
177 if (tb[IFLA_BROADCAST]) {
178 if (ifi->ifi_flags & IFF_POINTOPOINT)
182 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
183 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
185 b1, sizeof(b1)), stdout);
193 static int flush_update(void)
195 if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
196 bb_perror_msg("failed to send flush request");
203 static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
204 struct nlmsghdr *n, void *arg UNUSED_PARAM)
206 struct ifaddrmsg *ifa = NLMSG_DATA(n);
207 int len = n->nlmsg_len;
208 struct rtattr * rta_tb[IFA_MAX+1];
212 if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
214 len -= NLMSG_LENGTH(sizeof(*ifa));
216 bb_error_msg("wrong nlmsg len %d", len);
220 if (G_filter.flushb && n->nlmsg_type != RTM_NEWADDR)
223 memset(rta_tb, 0, sizeof(rta_tb));
224 parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
226 if (!rta_tb[IFA_LOCAL])
227 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
228 if (!rta_tb[IFA_ADDRESS])
229 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
231 if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
233 if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
235 if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
237 if (G_filter.label) {
239 if (rta_tb[IFA_LABEL])
240 label = RTA_DATA(rta_tb[IFA_LABEL]);
242 label = ll_idx_n2a(ifa->ifa_index, b1);
243 if (fnmatch(G_filter.label, label, 0) != 0)
246 if (G_filter.pfx.family) {
247 if (rta_tb[IFA_LOCAL]) {
249 memset(&dst, 0, sizeof(dst));
250 dst.family = ifa->ifa_family;
251 memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
252 if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
257 if (G_filter.flushb) {
259 if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
263 fn = (struct nlmsghdr*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
264 memcpy(fn, n, n->nlmsg_len);
265 fn->nlmsg_type = RTM_DELADDR;
266 fn->nlmsg_flags = NLM_F_REQUEST;
267 fn->nlmsg_seq = ++G_filter.rth->seq;
268 G_filter.flushp = (((char*)fn) + n->nlmsg_len) - G_filter.flushb;
269 G_filter.flushed = 1;
273 if (n->nlmsg_type == RTM_DELADDR)
276 if (G_filter.oneline)
277 printf("%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
278 if (ifa->ifa_family == AF_INET)
280 else if (ifa->ifa_family == AF_INET6)
283 printf(" family %d ", ifa->ifa_family);
285 if (rta_tb[IFA_LOCAL]) {
286 fputs(rt_addr_n2a(ifa->ifa_family,
287 RTA_DATA(rta_tb[IFA_LOCAL]),
288 abuf, sizeof(abuf)), stdout);
290 if (rta_tb[IFA_ADDRESS] == NULL
291 || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
293 printf("/%d ", ifa->ifa_prefixlen);
295 printf(" peer %s/%d ",
296 rt_addr_n2a(ifa->ifa_family,
297 RTA_DATA(rta_tb[IFA_ADDRESS]),
303 if (rta_tb[IFA_BROADCAST]) {
305 rt_addr_n2a(ifa->ifa_family,
306 RTA_DATA(rta_tb[IFA_BROADCAST]),
307 abuf, sizeof(abuf)));
309 if (rta_tb[IFA_ANYCAST]) {
311 rt_addr_n2a(ifa->ifa_family,
312 RTA_DATA(rta_tb[IFA_ANYCAST]),
313 abuf, sizeof(abuf)));
315 printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1));
316 if (ifa->ifa_flags & IFA_F_SECONDARY) {
317 ifa->ifa_flags &= ~IFA_F_SECONDARY;
318 printf("secondary ");
320 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
321 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
322 printf("tentative ");
324 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
325 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
326 printf("deprecated ");
328 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
331 ifa->ifa_flags &= ~IFA_F_PERMANENT;
333 printf("flags %02x ", ifa->ifa_flags);
334 if (rta_tb[IFA_LABEL])
335 fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
336 if (rta_tb[IFA_CACHEINFO]) {
337 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
340 if (ci->ifa_valid == 0xFFFFFFFFU)
341 sprintf(buf, "valid_lft forever");
343 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
344 if (ci->ifa_prefered == 0xFFFFFFFFU)
345 sprintf(buf+strlen(buf), " preferred_lft forever");
347 sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
357 struct nlmsg_list *next;
361 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
363 for (; ainfo; ainfo = ainfo->next) {
364 struct nlmsghdr *n = &ainfo->h;
365 struct ifaddrmsg *ifa = NLMSG_DATA(n);
367 if (n->nlmsg_type != RTM_NEWADDR)
369 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
371 if (ifa->ifa_index != ifindex
372 || (G_filter.family && G_filter.family != ifa->ifa_family)
376 print_addrinfo(NULL, n, NULL);
382 static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
384 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
385 struct nlmsg_list *h;
386 struct nlmsg_list **lp;
388 h = xzalloc(n->nlmsg_len + sizeof(void*));
390 memcpy(&h->h, n, n->nlmsg_len);
391 /*h->next = NULL; - xzalloc did it */
393 for (lp = linfo; *lp; lp = &(*lp)->next)
397 ll_remember_index(who, n, NULL);
401 static void ipaddr_reset_filter(int _oneline)
403 memset(&G_filter, 0, sizeof(G_filter));
404 G_filter.oneline = _oneline;
407 /* Return value becomes exitcode. It's okay to not return at all */
408 int ipaddr_list_or_flush(char **argv, int flush)
410 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
412 struct nlmsg_list *linfo = NULL;
413 struct nlmsg_list *ainfo = NULL;
414 struct nlmsg_list *l;
415 struct rtnl_handle rth;
416 char *filter_dev = NULL;
419 ipaddr_reset_filter(oneline);
420 G_filter.showqueue = 1;
422 if (G_filter.family == AF_UNSPEC)
423 G_filter.family = preferred_family;
427 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
429 if (G_filter.family == AF_PACKET) {
430 bb_error_msg_and_die("can't flush link addresses");
435 const int option_num = index_in_strings(option, *argv);
436 switch (option_num) {
439 get_prefix(&G_filter.pfx, *argv, G_filter.family);
440 if (G_filter.family == AF_UNSPEC) {
441 G_filter.family = G_filter.pfx.family;
444 case 1: { /* scope */
447 G_filter.scopemask = -1;
448 if (rtnl_rtscope_a2n(&scope, *argv)) {
449 if (strcmp(*argv, "all") != 0) {
450 invarg(*argv, "scope");
452 scope = RT_SCOPE_NOWHERE;
453 G_filter.scopemask = 0;
455 G_filter.scope = scope;
463 G_filter.label = *argv;
469 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) {
556 label = RTA_DATA(tb[IFA_LABEL]);
558 label = ll_idx_n2a(ifa->ifa_index, b1);
559 if (fnmatch(G_filter.label, label, 0) != 0)
574 for (l = linfo; l; l = l->next) {
575 if (no_link || print_linkinfo(&l->h) == 0) {
576 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
577 if (G_filter.family != AF_PACKET)
578 print_selected_addrinfo(ifi->ifi_index, ainfo);
585 static int default_scope(inet_prefix *lcl)
587 if (lcl->family == AF_INET) {
588 if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
589 return RT_SCOPE_HOST;
594 /* Return value becomes exitcode. It's okay to not return at all */
595 static int ipaddr_modify(int cmd, char **argv)
597 static const char option[] ALIGN1 =
598 "peer\0""remote\0""broadcast\0""brd\0"
599 "anycast\0""scope\0""dev\0""label\0""local\0";
600 struct rtnl_handle rth;
603 struct ifaddrmsg ifa;
616 memset(&req, 0, sizeof(req));
618 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
619 req.n.nlmsg_flags = NLM_F_REQUEST;
620 req.n.nlmsg_type = cmd;
621 req.ifa.ifa_family = preferred_family;
624 const int option_num = index_in_strings(option, *argv);
625 switch (option_num) {
631 duparg("peer", *argv);
633 get_prefix(&peer, *argv, req.ifa.ifa_family);
634 peer_len = peer.bytelen;
635 if (req.ifa.ifa_family == AF_UNSPEC) {
636 req.ifa.ifa_family = peer.family;
638 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
639 req.ifa.ifa_prefixlen = peer.bitlen;
641 case 2: /* broadcast */
647 duparg("broadcast", *argv);
649 if (LONE_CHAR(*argv, '+')) {
651 } else if (LONE_DASH(*argv)) {
654 get_addr(&addr, *argv, req.ifa.ifa_family);
655 if (req.ifa.ifa_family == AF_UNSPEC)
656 req.ifa.ifa_family = addr.family;
657 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
658 brd_len = addr.bytelen;
662 case 4: /* anycast */
667 duparg("anycast", *argv);
669 get_addr(&addr, *argv, req.ifa.ifa_family);
670 if (req.ifa.ifa_family == AF_UNSPEC) {
671 req.ifa.ifa_family = addr.family;
673 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
674 any_len = addr.bytelen;
681 if (rtnl_rtscope_a2n(&scope, *argv)) {
682 invarg(*argv, "scope");
684 req.ifa.ifa_scope = scope;
695 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
701 duparg2("local", *argv);
703 get_prefix(&lcl, *argv, req.ifa.ifa_family);
704 if (req.ifa.ifa_family == AF_UNSPEC) {
705 req.ifa.ifa_family = lcl.family;
707 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
708 local_len = lcl.bytelen;
714 bb_error_msg(bb_msg_requires_arg, "\"dev\"");
717 if (l && strncmp(d, l, strlen(d)) != 0) {
718 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
721 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
723 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
725 if (req.ifa.ifa_prefixlen == 0)
726 req.ifa.ifa_prefixlen = lcl.bitlen;
728 if (brd_len < 0 && cmd != RTM_DELADDR) {
731 if (req.ifa.ifa_family != AF_INET) {
732 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
735 if (brd.bitlen <= 30) {
736 for (i=31; i>=brd.bitlen; i--) {
738 brd.data[0] |= htonl(1<<(31-i));
740 brd.data[0] &= ~htonl(1<<(31-i));
742 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
743 brd_len = brd.bytelen;
746 if (!scoped && cmd != RTM_DELADDR)
747 req.ifa.ifa_scope = default_scope(&lcl);
753 req.ifa.ifa_index = xll_name_to_index(d);
755 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
761 /* Return value becomes exitcode. It's okay to not return at all */
762 int do_ipaddr(char **argv)
764 static const char commands[] ALIGN1 =
765 "add\0""delete\0""list\0""show\0""lst\0""flush\0";
767 int command_num = 2; /* default command is list */
770 command_num = index_in_substrings(commands, *argv);
771 if (command_num < 0 || command_num > 5)
772 bb_error_msg_and_die("unknown command %s", *argv);
775 if (command_num == 0) /* add */
776 return ipaddr_modify(RTM_NEWADDR, argv);
777 if (command_num == 1) /* delete */
778 return ipaddr_modify(RTM_DELADDR, argv);
779 if (command_num == 5) /* flush */
780 return ipaddr_list_or_flush(argv, 1);
781 /* 2 == list, 3 == show, 4 == lst */
782 return ipaddr_list_or_flush(argv, 0);