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 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 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;
104 if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
107 len -= NLMSG_LENGTH(sizeof(*ifi));
111 if (filter.ifindex && ifi->ifi_index != filter.ifindex)
113 if (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 && (!filter.family || filter.family == AF_PACKET)
124 && fnmatch(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>");
137 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
141 printf("@%s: ", ll_idx_n2a(iflink, b1));
142 m_flag = ll_index_to_flags(iflink);
143 m_flag = !(m_flag & IFF_UP);
148 print_link_flags(ifi->ifi_flags, m_flag);
151 printf("mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
153 printf("qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
155 if (tb[IFLA_MASTER]) {
157 printf("master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
160 if (filter.showqueue)
161 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
163 if (!filter.family || filter.family == AF_PACKET) {
165 printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1, sizeof(b1)));
167 if (tb[IFLA_ADDRESS]) {
168 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
169 RTA_PAYLOAD(tb[IFLA_ADDRESS]),
171 b1, sizeof(b1)), stdout);
173 if (tb[IFLA_BROADCAST]) {
174 if (ifi->ifi_flags & IFF_POINTOPOINT)
178 fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
179 RTA_PAYLOAD(tb[IFLA_BROADCAST]),
181 b1, sizeof(b1)), stdout);
189 static int flush_update(void)
191 if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
192 bb_perror_msg("failed to send flush request");
199 static int print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
200 struct nlmsghdr *n, void *arg UNUSED_PARAM)
202 struct ifaddrmsg *ifa = NLMSG_DATA(n);
203 int len = n->nlmsg_len;
204 struct rtattr * rta_tb[IFA_MAX+1];
208 if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
210 len -= NLMSG_LENGTH(sizeof(*ifa));
212 bb_error_msg("wrong nlmsg len %d", len);
216 if (filter.flushb && n->nlmsg_type != RTM_NEWADDR)
219 memset(rta_tb, 0, sizeof(rta_tb));
220 parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
222 if (!rta_tb[IFA_LOCAL])
223 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
224 if (!rta_tb[IFA_ADDRESS])
225 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
227 if (filter.ifindex && filter.ifindex != ifa->ifa_index)
229 if ((filter.scope ^ ifa->ifa_scope) & filter.scopemask)
231 if ((filter.flags ^ ifa->ifa_flags) & filter.flagmask)
235 if (rta_tb[IFA_LABEL])
236 label = RTA_DATA(rta_tb[IFA_LABEL]);
238 label = ll_idx_n2a(ifa->ifa_index, b1);
239 if (fnmatch(filter.label, label, 0) != 0)
242 if (filter.pfx.family) {
243 if (rta_tb[IFA_LOCAL]) {
245 memset(&dst, 0, sizeof(dst));
246 dst.family = ifa->ifa_family;
247 memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
248 if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
255 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
259 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
260 memcpy(fn, n, n->nlmsg_len);
261 fn->nlmsg_type = RTM_DELADDR;
262 fn->nlmsg_flags = NLM_F_REQUEST;
263 fn->nlmsg_seq = ++filter.rth->seq;
264 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
269 if (n->nlmsg_type == RTM_DELADDR)
273 printf("%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
274 if (ifa->ifa_family == AF_INET)
276 else if (ifa->ifa_family == AF_INET6)
279 printf(" family %d ", ifa->ifa_family);
281 if (rta_tb[IFA_LOCAL]) {
282 fputs(rt_addr_n2a(ifa->ifa_family,
283 RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
284 RTA_DATA(rta_tb[IFA_LOCAL]),
285 abuf, sizeof(abuf)), stdout);
287 if (rta_tb[IFA_ADDRESS] == NULL ||
288 memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
289 printf("/%d ", ifa->ifa_prefixlen);
291 printf(" peer %s/%d ",
292 rt_addr_n2a(ifa->ifa_family,
293 RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
294 RTA_DATA(rta_tb[IFA_ADDRESS]),
300 if (rta_tb[IFA_BROADCAST]) {
302 rt_addr_n2a(ifa->ifa_family,
303 RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
304 RTA_DATA(rta_tb[IFA_BROADCAST]),
305 abuf, sizeof(abuf)));
307 if (rta_tb[IFA_ANYCAST]) {
309 rt_addr_n2a(ifa->ifa_family,
310 RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
311 RTA_DATA(rta_tb[IFA_ANYCAST]),
312 abuf, sizeof(abuf)));
314 printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1)));
315 if (ifa->ifa_flags & IFA_F_SECONDARY) {
316 ifa->ifa_flags &= ~IFA_F_SECONDARY;
317 printf("secondary ");
319 if (ifa->ifa_flags & IFA_F_TENTATIVE) {
320 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
321 printf("tentative ");
323 if (ifa->ifa_flags & IFA_F_DEPRECATED) {
324 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
325 printf("deprecated ");
327 if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
330 ifa->ifa_flags &= ~IFA_F_PERMANENT;
332 printf("flags %02x ", ifa->ifa_flags);
333 if (rta_tb[IFA_LABEL])
334 fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
335 if (rta_tb[IFA_CACHEINFO]) {
336 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
339 if (ci->ifa_valid == 0xFFFFFFFFU)
340 sprintf(buf, "valid_lft forever");
342 sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
343 if (ci->ifa_prefered == 0xFFFFFFFFU)
344 sprintf(buf+strlen(buf), " preferred_lft forever");
346 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)
370 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
373 if (ifa->ifa_index != ifindex ||
374 (filter.family && filter.family != ifa->ifa_family))
377 print_addrinfo(NULL, n, NULL);
383 static int store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
385 struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
386 struct nlmsg_list *h;
387 struct nlmsg_list **lp;
389 h = malloc(n->nlmsg_len+sizeof(void*));
393 memcpy(&h->h, n, n->nlmsg_len);
396 for (lp = linfo; *lp; lp = &(*lp)->next)
400 ll_remember_index(who, n, NULL);
404 static void ipaddr_reset_filter(int _oneline)
406 memset(&filter, 0, sizeof(filter));
407 filter.oneline = _oneline;
410 /* Return value becomes exitcode. It's okay to not return at all */
411 int ipaddr_list_or_flush(char **argv, int flush)
413 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
415 struct nlmsg_list *linfo = NULL;
416 struct nlmsg_list *ainfo = NULL;
417 struct nlmsg_list *l;
418 struct rtnl_handle rth;
419 char *filter_dev = NULL;
422 ipaddr_reset_filter(oneline);
423 filter.showqueue = 1;
425 if (filter.family == AF_UNSPEC)
426 filter.family = preferred_family;
430 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
432 if (filter.family == AF_PACKET) {
433 bb_error_msg_and_die("cannot flush link addresses");
438 const int option_num = index_in_strings(option, *argv);
439 switch (option_num) {
442 get_prefix(&filter.pfx, *argv, filter.family);
443 if (filter.family == AF_UNSPEC) {
444 filter.family = filter.pfx.family;
451 filter.scopemask = -1;
452 if (rtnl_rtscope_a2n(&scope, *argv)) {
453 if (strcmp(*argv, "all") != 0) {
454 invarg(*argv, "scope");
456 scope = RT_SCOPE_NOWHERE;
457 filter.scopemask = 0;
459 filter.scope = scope;
467 filter.label = *argv;
473 duparg2("dev", *argv);
482 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
483 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
486 filter.ifindex = xll_name_to_index(filter_dev);
490 char flushb[4096-512];
492 filter.flushb = flushb;
494 filter.flushe = sizeof(flushb);
498 xrtnl_wilddump_request(&rth, filter.family, RTM_GETADDR);
500 xrtnl_dump_filter(&rth, print_addrinfo, NULL);
501 if (filter.flushed == 0) {
504 if (flush_update() < 0)
509 if (filter.family != AF_PACKET) {
510 xrtnl_wilddump_request(&rth, filter.family, RTM_GETADDR);
511 xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
515 if (filter.family && filter.family != AF_PACKET) {
516 struct nlmsg_list **lp;
522 while ((l = *lp) != NULL) {
524 struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
525 struct nlmsg_list *a;
527 for (a = ainfo; a; a = a->next) {
528 struct nlmsghdr *n = &a->h;
529 struct ifaddrmsg *ifa = NLMSG_DATA(n);
531 if (ifa->ifa_index != ifi->ifi_index ||
532 (filter.family && filter.family != ifa->ifa_family))
534 if ((filter.scope ^ ifa->ifa_scope) & filter.scopemask)
536 if ((filter.flags ^ ifa->ifa_flags) & filter.flagmask)
538 if (filter.pfx.family || 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 (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, &filter.pfx, filter.pfx.bitlen))
557 label = RTA_DATA(tb[IFA_LABEL]);
559 label = ll_idx_n2a(ifa->ifa_index, b1);
560 if (fnmatch(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 (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 int option_num = index_in_strings(option, *argv);
626 switch (option_num) {
632 duparg("peer", *argv);
634 get_prefix(&peer, *argv, req.ifa.ifa_family);
635 peer_len = peer.bytelen;
636 if (req.ifa.ifa_family == AF_UNSPEC) {
637 req.ifa.ifa_family = peer.family;
639 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
640 req.ifa.ifa_prefixlen = peer.bitlen;
642 case 2: /* broadcast */
648 duparg("broadcast", *argv);
650 if (LONE_CHAR(*argv, '+')) {
652 } else if (LONE_DASH(*argv)) {
655 get_addr(&addr, *argv, req.ifa.ifa_family);
656 if (req.ifa.ifa_family == AF_UNSPEC)
657 req.ifa.ifa_family = addr.family;
658 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
659 brd_len = addr.bytelen;
663 case 4: /* anycast */
668 duparg("anycast", *argv);
670 get_addr(&addr, *argv, req.ifa.ifa_family);
671 if (req.ifa.ifa_family == AF_UNSPEC) {
672 req.ifa.ifa_family = addr.family;
674 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
675 any_len = addr.bytelen;
682 if (rtnl_rtscope_a2n(&scope, *argv)) {
683 invarg(*argv, "scope");
685 req.ifa.ifa_scope = scope;
696 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
702 duparg2("local", *argv);
704 get_prefix(&lcl, *argv, req.ifa.ifa_family);
705 if (req.ifa.ifa_family == AF_UNSPEC) {
706 req.ifa.ifa_family = lcl.family;
708 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
709 local_len = lcl.bytelen;
715 bb_error_msg(bb_msg_requires_arg, "\"dev\"");
718 if (l && strncmp(d, l, strlen(d)) != 0) {
719 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
722 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
724 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
726 if (req.ifa.ifa_prefixlen == 0)
727 req.ifa.ifa_prefixlen = lcl.bitlen;
729 if (brd_len < 0 && cmd != RTM_DELADDR) {
732 if (req.ifa.ifa_family != AF_INET) {
733 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
736 if (brd.bitlen <= 30) {
737 for (i=31; i>=brd.bitlen; i--) {
739 brd.data[0] |= htonl(1<<(31-i));
741 brd.data[0] &= ~htonl(1<<(31-i));
743 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
744 brd_len = brd.bytelen;
747 if (!scoped && cmd != RTM_DELADDR)
748 req.ifa.ifa_scope = default_scope(&lcl);
754 req.ifa.ifa_index = xll_name_to_index(d);
756 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
762 /* Return value becomes exitcode. It's okay to not return at all */
763 int do_ipaddr(char **argv)
765 static const char commands[] ALIGN1 =
766 "add\0""delete\0""list\0""show\0""lst\0""flush\0";
768 int command_num = 2; /* default command is list */
771 command_num = index_in_substrings(commands, *argv);
772 if (command_num < 0 || command_num > 5)
773 bb_error_msg_and_die("unknown command %s", *argv);
776 if (command_num == 0) /* add */
777 return ipaddr_modify(RTM_NEWADDR, argv);
778 if (command_num == 1) /* delete */
779 return ipaddr_modify(RTM_DELADDR, argv);
780 if (command_num == 5) /* flush */
781 return ipaddr_list_or_flush(argv, 1);
782 /* 2 == list, 3 == show, 4 == lst */
783 return ipaddr_list_or_flush(argv, 0);