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 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 (filter.ifindex && ifi->ifi_index != filter.ifindex)
112 if (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 && (!filter.family || filter.family == AF_PACKET)
123 && fnmatch(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 (filter.showqueue)
165 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
167 if (!filter.family || 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(filter.rth, filter.flushb, 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 (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 (filter.ifindex && filter.ifindex != ifa->ifa_index)
233 if ((filter.scope ^ ifa->ifa_scope) & filter.scopemask)
235 if ((filter.flags ^ ifa->ifa_flags) & filter.flagmask)
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(filter.label, label, 0) != 0)
246 if (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, &filter.pfx, filter.pfx.bitlen))
259 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
263 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(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 = ++filter.rth->seq;
268 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
273 if (n->nlmsg_type == RTM_DELADDR)
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)
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 FAST_FUNC 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 = xzalloc(n->nlmsg_len + sizeof(void*));
391 memcpy(&h->h, n, n->nlmsg_len);
392 /*h->next = NULL; - xzalloc did it */
394 for (lp = linfo; *lp; lp = &(*lp)->next)
398 ll_remember_index(who, n, NULL);
402 static void ipaddr_reset_filter(int _oneline)
404 memset(&filter, 0, sizeof(filter));
405 filter.oneline = _oneline;
408 /* Return value becomes exitcode. It's okay to not return at all */
409 int ipaddr_list_or_flush(char **argv, int flush)
411 static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
413 struct nlmsg_list *linfo = NULL;
414 struct nlmsg_list *ainfo = NULL;
415 struct nlmsg_list *l;
416 struct rtnl_handle rth;
417 char *filter_dev = NULL;
420 ipaddr_reset_filter(oneline);
421 filter.showqueue = 1;
423 if (filter.family == AF_UNSPEC)
424 filter.family = preferred_family;
428 bb_error_msg_and_die(bb_msg_requires_arg, "flush");
430 if (filter.family == AF_PACKET) {
431 bb_error_msg_and_die("can't flush link addresses");
436 const int option_num = index_in_strings(option, *argv);
437 switch (option_num) {
440 get_prefix(&filter.pfx, *argv, filter.family);
441 if (filter.family == AF_UNSPEC) {
442 filter.family = filter.pfx.family;
449 filter.scopemask = -1;
450 if (rtnl_rtscope_a2n(&scope, *argv)) {
451 if (strcmp(*argv, "all") != 0) {
452 invarg(*argv, "scope");
454 scope = RT_SCOPE_NOWHERE;
455 filter.scopemask = 0;
457 filter.scope = scope;
465 filter.label = *argv;
471 duparg2("dev", *argv);
480 xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
481 xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
484 filter.ifindex = xll_name_to_index(filter_dev);
488 char flushb[4096-512];
490 filter.flushb = flushb;
492 filter.flushe = sizeof(flushb);
496 xrtnl_wilddump_request(&rth, filter.family, RTM_GETADDR);
498 xrtnl_dump_filter(&rth, print_addrinfo, NULL);
499 if (filter.flushed == 0) {
502 if (flush_update() < 0)
507 if (filter.family != AF_PACKET) {
508 xrtnl_wilddump_request(&rth, filter.family, RTM_GETADDR);
509 xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
513 if (filter.family && filter.family != AF_PACKET) {
514 struct nlmsg_list **lp;
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 (filter.family && filter.family != ifa->ifa_family))
532 if ((filter.scope ^ ifa->ifa_scope) & filter.scopemask)
534 if ((filter.flags ^ ifa->ifa_flags) & filter.flagmask)
536 if (filter.pfx.family || filter.label) {
537 struct rtattr *tb[IFA_MAX+1];
538 memset(tb, 0, sizeof(tb));
539 parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
541 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
543 if (filter.pfx.family && tb[IFA_LOCAL]) {
545 memset(&dst, 0, sizeof(dst));
546 dst.family = ifa->ifa_family;
547 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
548 if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
555 label = RTA_DATA(tb[IFA_LABEL]);
557 label = ll_idx_n2a(ifa->ifa_index, b1);
558 if (fnmatch(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 (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, 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;
619 req.n.nlmsg_type = cmd;
620 req.ifa.ifa_family = preferred_family;
623 const int option_num = index_in_strings(option, *argv);
624 switch (option_num) {
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;
640 case 2: /* broadcast */
646 duparg("broadcast", *argv);
648 if (LONE_CHAR(*argv, '+')) {
650 } else if (LONE_DASH(*argv)) {
653 get_addr(&addr, *argv, req.ifa.ifa_family);
654 if (req.ifa.ifa_family == AF_UNSPEC)
655 req.ifa.ifa_family = addr.family;
656 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
657 brd_len = addr.bytelen;
661 case 4: /* anycast */
666 duparg("anycast", *argv);
668 get_addr(&addr, *argv, req.ifa.ifa_family);
669 if (req.ifa.ifa_family == AF_UNSPEC) {
670 req.ifa.ifa_family = addr.family;
672 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
673 any_len = addr.bytelen;
680 if (rtnl_rtscope_a2n(&scope, *argv)) {
681 invarg(*argv, "scope");
683 req.ifa.ifa_scope = scope;
694 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
700 duparg2("local", *argv);
702 get_prefix(&lcl, *argv, req.ifa.ifa_family);
703 if (req.ifa.ifa_family == AF_UNSPEC) {
704 req.ifa.ifa_family = lcl.family;
706 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
707 local_len = lcl.bytelen;
713 bb_error_msg(bb_msg_requires_arg, "\"dev\"");
716 if (l && strncmp(d, l, strlen(d)) != 0) {
717 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
720 if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
722 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
724 if (req.ifa.ifa_prefixlen == 0)
725 req.ifa.ifa_prefixlen = lcl.bitlen;
727 if (brd_len < 0 && cmd != RTM_DELADDR) {
730 if (req.ifa.ifa_family != AF_INET) {
731 bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
734 if (brd.bitlen <= 30) {
735 for (i=31; i>=brd.bitlen; i--) {
737 brd.data[0] |= htonl(1<<(31-i));
739 brd.data[0] &= ~htonl(1<<(31-i));
741 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
742 brd_len = brd.bytelen;
745 if (!scoped && cmd != RTM_DELADDR)
746 req.ifa.ifa_scope = default_scope(&lcl);
752 req.ifa.ifa_index = xll_name_to_index(d);
754 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
760 /* Return value becomes exitcode. It's okay to not return at all */
761 int do_ipaddr(char **argv)
763 static const char commands[] ALIGN1 =
764 "add\0""delete\0""list\0""show\0""lst\0""flush\0";
766 int command_num = 2; /* default command is list */
769 command_num = index_in_substrings(commands, *argv);
770 if (command_num < 0 || command_num > 5)
771 bb_error_msg_and_die("unknown command %s", *argv);
774 if (command_num == 0) /* add */
775 return ipaddr_modify(RTM_NEWADDR, argv);
776 if (command_num == 1) /* delete */
777 return ipaddr_modify(RTM_DELADDR, argv);
778 if (command_num == 5) /* flush */
779 return ipaddr_list_or_flush(argv, 1);
780 /* 2 == list, 3 == show, 4 == lst */
781 return ipaddr_list_or_flush(argv, 0);