4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
20 #include <sys/socket.h>
22 #include <linux/if_packet.h>
23 #include <linux/if_ether.h>
24 #include <linux/sockios.h>
25 #include <netinet/in.h>
26 #include <arpa/inet.h>
28 #include <sys/ioctl.h>
29 #include <linux/sockios.h>
33 #include "ip_common.h"
35 #define IPLINK_IOCTL_COMPAT 1
37 #define LIBDIR "/usr/lib/"
40 static void usage(void) __attribute__((noreturn));
41 static int iplink_have_newlink(void);
43 void iplink_usage(void)
45 if (iplink_have_newlink()) {
46 fprintf(stderr, "Usage: ip link add [link DEV] [ name ] NAME\n");
47 fprintf(stderr, " [ txqueuelen PACKETS ]\n");
48 fprintf(stderr, " [ address LLADDR ]\n");
49 fprintf(stderr, " [ broadcast LLADDR ]\n");
50 fprintf(stderr, " [ mtu MTU ]\n");
51 fprintf(stderr, " type TYPE [ ARGS ]\n");
52 fprintf(stderr, " ip link delete DEV type TYPE [ ARGS ]\n");
53 fprintf(stderr, "\n");
54 fprintf(stderr, " ip link set { dev DEVICE | group DEVGROUP } [ { up | down } ]\n");
56 fprintf(stderr, "Usage: ip link set DEVICE [ { up | down } ]\n");
58 fprintf(stderr, " [ arp { on | off } ]\n");
59 fprintf(stderr, " [ dynamic { on | off } ]\n");
60 fprintf(stderr, " [ multicast { on | off } ]\n");
61 fprintf(stderr, " [ allmulticast { on | off } ]\n");
62 fprintf(stderr, " [ promisc { on | off } ]\n");
63 fprintf(stderr, " [ trailers { on | off } ]\n");
64 fprintf(stderr, " [ txqueuelen PACKETS ]\n");
65 fprintf(stderr, " [ name NEWNAME ]\n");
66 fprintf(stderr, " [ address LLADDR ]\n");
67 fprintf(stderr, " [ broadcast LLADDR ]\n");
68 fprintf(stderr, " [ mtu MTU ]\n");
69 fprintf(stderr, " [ netns PID ]\n");
70 fprintf(stderr, " [ netns NAME ]\n");
71 fprintf(stderr, " [ alias NAME ]\n");
72 fprintf(stderr, " [ vf NUM [ mac LLADDR ]\n");
73 fprintf(stderr, " [ vlan VLANID [ qos VLAN-QOS ] ]\n");
75 fprintf(stderr, " [ rate TXRATE ] ] \n");
77 fprintf(stderr, " [ spoofchk { on | off} ] ] \n");
78 fprintf(stderr, " [ master DEVICE ]\n");
79 fprintf(stderr, " [ nomaster ]\n");
80 fprintf(stderr, " ip link show [ DEVICE | group GROUP ]\n");
82 if (iplink_have_newlink()) {
83 fprintf(stderr, "\n");
84 fprintf(stderr, "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | can | bridge }\n");
89 static void usage(void)
94 static int on_off(char *msg)
96 fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg);
100 static void *BODY; /* cached dlopen(NULL) handle */
101 static struct link_util *linkutil_list;
103 struct link_util *get_link_kind(const char *id)
109 for (l = linkutil_list; l; l = l->next)
110 if (strcmp(l->id, id) == 0)
113 snprintf(buf, sizeof(buf), LIBDIR "/ip/link_%s.so", id);
114 dlh = dlopen(buf, RTLD_LAZY);
116 /* look in current binary, only open once */
119 dlh = BODY = dlopen(NULL, RTLD_LAZY);
125 snprintf(buf, sizeof(buf), "%s_link_util", id);
130 l->next = linkutil_list;
135 #if IPLINK_IOCTL_COMPAT
136 static int have_rtnl_newlink = -1;
138 static int accept_msg(const struct sockaddr_nl *who,
139 struct nlmsghdr *n, void *arg)
141 struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n);
143 if (n->nlmsg_type == NLMSG_ERROR &&
144 (err->error == -EOPNOTSUPP || err->error == -EINVAL))
145 have_rtnl_newlink = 0;
147 have_rtnl_newlink = 1;
151 static int iplink_have_newlink(void)
159 if (have_rtnl_newlink < 0) {
160 memset(&req, 0, sizeof(req));
162 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
163 req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
164 req.n.nlmsg_type = RTM_NEWLINK;
165 req.i.ifi_family = AF_UNSPEC;
167 rtnl_send(&rth, &req.n, req.n.nlmsg_len);
168 rtnl_listen(&rth, accept_msg, NULL);
170 return have_rtnl_newlink;
172 #else /* IPLINK_IOCTL_COMPAT */
173 static int iplink_have_newlink(void)
177 #endif /* ! IPLINK_IOCTL_COMPAT */
185 int iplink_parse_vf(int vf, int *argcp, char ***argvp,
186 struct iplink_req *req)
188 int len, argc = *argcp;
189 char **argv = *argvp;
190 struct rtattr *vfinfo;
192 vfinfo = addattr_nest(&req->n, sizeof(*req), IFLA_VF_INFO);
194 while (NEXT_ARG_OK()) {
196 if (matches(*argv, "mac") == 0) {
197 struct ifla_vf_mac ivm;
200 len = ll_addr_a2n((char *)ivm.mac, 32, *argv);
203 addattr_l(&req->n, sizeof(*req), IFLA_VF_MAC, &ivm, sizeof(ivm));
204 } else if (matches(*argv, "vlan") == 0) {
205 struct ifla_vf_vlan ivv;
207 if (get_unsigned(&ivv.vlan, *argv, 0)) {
208 invarg("Invalid \"vlan\" value\n", *argv);
214 if (matches(*argv, "qos") == 0) {
216 if (get_unsigned(&ivv.qos, *argv, 0)) {
217 invarg("Invalid \"qos\" value\n", *argv);
224 addattr_l(&req->n, sizeof(*req), IFLA_VF_VLAN, &ivv, sizeof(ivv));
225 } else if (matches(*argv, "rate") == 0) {
226 struct ifla_vf_tx_rate ivt;
228 if (get_unsigned(&ivt.rate, *argv, 0)) {
229 invarg("Invalid \"rate\" value\n", *argv);
232 addattr_l(&req->n, sizeof(*req), IFLA_VF_TX_RATE, &ivt, sizeof(ivt));
234 } else if (matches(*argv, "spoofchk") == 0) {
235 struct ifla_vf_spoofchk ivs;
237 if (matches(*argv, "on") == 0)
239 else if (matches(*argv, "off") == 0)
242 invarg("Invalid \"spoofchk\" value\n", *argv);
244 addattr_l(&req->n, sizeof(*req), IFLA_VF_SPOOFCHK, &ivs, sizeof(ivs));
254 incomplete_command();
256 addattr_nest_end(&req->n, vfinfo);
264 int iplink_parse(int argc, char **argv, struct iplink_req *req,
265 char **name, char **type, char **link, char **dev, int *group)
278 if (strcmp(*argv, "up") == 0) {
279 req->i.ifi_change |= IFF_UP;
280 req->i.ifi_flags |= IFF_UP;
281 } else if (strcmp(*argv, "down") == 0) {
282 req->i.ifi_change |= IFF_UP;
283 req->i.ifi_flags &= ~IFF_UP;
284 } else if (strcmp(*argv, "name") == 0) {
287 } else if (matches(*argv, "link") == 0) {
290 } else if (matches(*argv, "address") == 0) {
292 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
295 addattr_l(&req->n, sizeof(*req), IFLA_ADDRESS, abuf, len);
296 } else if (matches(*argv, "broadcast") == 0 ||
297 strcmp(*argv, "brd") == 0) {
299 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
302 addattr_l(&req->n, sizeof(*req), IFLA_BROADCAST, abuf, len);
303 } else if (matches(*argv, "txqueuelen") == 0 ||
304 strcmp(*argv, "qlen") == 0 ||
305 matches(*argv, "txqlen") == 0) {
308 duparg("txqueuelen", *argv);
309 if (get_integer(&qlen, *argv, 0))
310 invarg("Invalid \"txqueuelen\" value\n", *argv);
311 addattr_l(&req->n, sizeof(*req), IFLA_TXQLEN, &qlen, 4);
312 } else if (strcmp(*argv, "mtu") == 0) {
315 duparg("mtu", *argv);
316 if (get_integer(&mtu, *argv, 0))
317 invarg("Invalid \"mtu\" value\n", *argv);
318 addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4);
319 } else if (strcmp(*argv, "netns") == 0) {
322 duparg("netns", *argv);
323 if ((netns = get_netns_fd(*argv)) >= 0)
324 addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_FD, &netns, 4);
325 else if (get_integer(&netns, *argv, 0) == 0)
326 addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_PID, &netns, 4);
328 invarg("Invalid \"netns\" value\n", *argv);
329 } else if (strcmp(*argv, "multicast") == 0) {
331 req->i.ifi_change |= IFF_MULTICAST;
332 if (strcmp(*argv, "on") == 0) {
333 req->i.ifi_flags |= IFF_MULTICAST;
334 } else if (strcmp(*argv, "off") == 0) {
335 req->i.ifi_flags &= ~IFF_MULTICAST;
337 return on_off("multicast");
338 } else if (strcmp(*argv, "allmulticast") == 0) {
340 req->i.ifi_change |= IFF_ALLMULTI;
341 if (strcmp(*argv, "on") == 0) {
342 req->i.ifi_flags |= IFF_ALLMULTI;
343 } else if (strcmp(*argv, "off") == 0) {
344 req->i.ifi_flags &= ~IFF_ALLMULTI;
346 return on_off("allmulticast");
347 } else if (strcmp(*argv, "promisc") == 0) {
349 req->i.ifi_change |= IFF_PROMISC;
350 if (strcmp(*argv, "on") == 0) {
351 req->i.ifi_flags |= IFF_PROMISC;
352 } else if (strcmp(*argv, "off") == 0) {
353 req->i.ifi_flags &= ~IFF_PROMISC;
355 return on_off("promisc");
356 } else if (strcmp(*argv, "trailers") == 0) {
358 req->i.ifi_change |= IFF_NOTRAILERS;
359 if (strcmp(*argv, "off") == 0) {
360 req->i.ifi_flags |= IFF_NOTRAILERS;
361 } else if (strcmp(*argv, "on") == 0) {
362 req->i.ifi_flags &= ~IFF_NOTRAILERS;
364 return on_off("trailers");
365 } else if (strcmp(*argv, "arp") == 0) {
367 req->i.ifi_change |= IFF_NOARP;
368 if (strcmp(*argv, "on") == 0) {
369 req->i.ifi_flags &= ~IFF_NOARP;
370 } else if (strcmp(*argv, "off") == 0) {
371 req->i.ifi_flags |= IFF_NOARP;
373 return on_off("noarp");
374 } else if (strcmp(*argv, "vf") == 0) {
375 struct rtattr *vflist;
377 if (get_integer(&vf, *argv, 0)) {
378 invarg("Invalid \"vf\" value\n", *argv);
380 vflist = addattr_nest(&req->n, sizeof(*req),
382 len = iplink_parse_vf(vf, &argc, &argv, req);
385 addattr_nest_end(&req->n, vflist);
386 } else if (matches(*argv, "master") == 0) {
389 ifindex = ll_name_to_index(*argv);
391 invarg("Device does not exist\n", *argv);
392 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
394 } else if (matches(*argv, "nomaster") == 0) {
396 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
398 } else if (matches(*argv, "dynamic") == 0) {
400 req->i.ifi_change |= IFF_DYNAMIC;
401 if (strcmp(*argv, "on") == 0) {
402 req->i.ifi_flags |= IFF_DYNAMIC;
403 } else if (strcmp(*argv, "off") == 0) {
404 req->i.ifi_flags &= ~IFF_DYNAMIC;
406 return on_off("dynamic");
407 } else if (matches(*argv, "type") == 0) {
412 } else if (matches(*argv, "alias") == 0) {
414 addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
415 *argv, strlen(*argv));
418 } else if (strcmp(*argv, "group") == 0) {
421 duparg("group", *argv);
422 if (rtnl_group_a2n(group, *argv))
423 invarg("Invalid \"group\" value\n", *argv);
425 if (strcmp(*argv, "dev") == 0) {
428 if (matches(*argv, "help") == 0)
431 duparg2("dev", *argv);
440 static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
448 struct link_util *lu = NULL;
449 struct iplink_req req;
452 memset(&req, 0, sizeof(req));
454 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
455 req.n.nlmsg_flags = NLM_F_REQUEST|flags;
456 req.n.nlmsg_type = cmd;
457 req.i.ifi_family = preferred_family;
459 ret = iplink_parse(argc, argv, &req, &name, &type, &link, &dev, &group);
468 addattr_l(&req.n, sizeof(req), IFLA_GROUP,
469 &group, sizeof(group));
472 fprintf(stderr, "Garbage instead of arguments "
473 "\"%s ...\". Try \"ip link "
477 if (flags & NLM_F_CREATE) {
478 fprintf(stderr, "group cannot be used when "
479 "creating devices.\n");
484 addattr32(&req.n, sizeof(req), IFLA_GROUP, group);
485 if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0)
494 struct rtattr *linkinfo = NLMSG_TAIL(&req.n);
495 addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
496 addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
499 lu = get_link_kind(type);
501 struct rtattr * data = NLMSG_TAIL(&req.n);
502 addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0);
505 lu->parse_opt(lu, argc, argv, &req.n))
508 data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data;
510 if (matches(*argv, "help") == 0)
512 fprintf(stderr, "Garbage instead of arguments \"%s ...\". "
513 "Try \"ip link help\".\n", *argv);
516 linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
517 } else if (flags & NLM_F_CREATE) {
518 fprintf(stderr, "Not enough information: \"type\" argument "
523 if (!(flags & NLM_F_CREATE)) {
525 fprintf(stderr, "Not enough information: \"dev\" "
526 "argument is required.\n");
530 req.i.ifi_index = ll_name_to_index(dev);
531 if (req.i.ifi_index == 0) {
532 fprintf(stderr, "Cannot find device \"%s\"\n", dev);
536 /* Allow "ip link add dev" and "ip link add name" */
543 ifindex = ll_name_to_index(link);
545 fprintf(stderr, "Cannot find device \"%s\"\n",
549 addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4);
554 len = strlen(name) + 1;
556 invarg("\"\" is not a valid device identifier\n", "name");
558 invarg("\"name\" too long\n", name);
559 addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len);
562 if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0)
568 #if IPLINK_IOCTL_COMPAT
569 static int get_ctl_fd(void)
574 fd = socket(PF_INET, SOCK_DGRAM, 0);
578 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
581 fd = socket(PF_INET6, SOCK_DGRAM, 0);
585 perror("Cannot create control socket");
589 static int do_chflags(const char *dev, __u32 flags, __u32 mask)
595 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
599 err = ioctl(fd, SIOCGIFFLAGS, &ifr);
601 perror("SIOCGIFFLAGS");
605 if ((ifr.ifr_flags^flags)&mask) {
606 ifr.ifr_flags &= ~mask;
607 ifr.ifr_flags |= mask&flags;
608 err = ioctl(fd, SIOCSIFFLAGS, &ifr);
610 perror("SIOCSIFFLAGS");
616 static int do_changename(const char *dev, const char *newdev)
622 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
623 strncpy(ifr.ifr_newname, newdev, IFNAMSIZ);
627 err = ioctl(fd, SIOCSIFNAME, &ifr);
629 perror("SIOCSIFNAME");
637 static int set_qlen(const char *dev, int qlen)
646 memset(&ifr, 0, sizeof(ifr));
647 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
649 if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
650 perror("SIOCSIFXQLEN");
659 static int set_mtu(const char *dev, int mtu)
668 memset(&ifr, 0, sizeof(ifr));
669 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
671 if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
672 perror("SIOCSIFMTU");
681 static int get_address(const char *dev, int *htype)
684 struct sockaddr_ll me;
688 s = socket(PF_PACKET, SOCK_DGRAM, 0);
690 perror("socket(PF_PACKET)");
694 memset(&ifr, 0, sizeof(ifr));
695 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
696 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
697 perror("SIOCGIFINDEX");
702 memset(&me, 0, sizeof(me));
703 me.sll_family = AF_PACKET;
704 me.sll_ifindex = ifr.ifr_ifindex;
705 me.sll_protocol = htons(ETH_P_LOOP);
706 if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {
713 if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
714 perror("getsockname");
719 *htype = me.sll_hatype;
723 static int parse_address(const char *dev, int hatype, int halen,
724 char *lla, struct ifreq *ifr)
728 memset(ifr, 0, sizeof(*ifr));
729 strncpy(ifr->ifr_name, dev, IFNAMSIZ);
730 ifr->ifr_hwaddr.sa_family = hatype;
731 alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
735 fprintf(stderr, "Wrong address (%s) length: expected %d bytes\n", lla, halen);
741 static int set_address(struct ifreq *ifr, int brd)
748 if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
749 perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
758 static int do_set(int argc, char **argv)
765 char *newaddr = NULL;
767 struct ifreq ifr0, ifr1;
768 char *newname = NULL;
772 if (strcmp(*argv, "up") == 0) {
775 } else if (strcmp(*argv, "down") == 0) {
778 } else if (strcmp(*argv, "name") == 0) {
781 } else if (matches(*argv, "address") == 0) {
784 } else if (matches(*argv, "broadcast") == 0 ||
785 strcmp(*argv, "brd") == 0) {
788 } else if (matches(*argv, "txqueuelen") == 0 ||
789 strcmp(*argv, "qlen") == 0 ||
790 matches(*argv, "txqlen") == 0) {
793 duparg("txqueuelen", *argv);
794 if (get_integer(&qlen, *argv, 0))
795 invarg("Invalid \"txqueuelen\" value\n", *argv);
796 } else if (strcmp(*argv, "mtu") == 0) {
799 duparg("mtu", *argv);
800 if (get_integer(&mtu, *argv, 0))
801 invarg("Invalid \"mtu\" value\n", *argv);
802 } else if (strcmp(*argv, "multicast") == 0) {
804 mask |= IFF_MULTICAST;
805 if (strcmp(*argv, "on") == 0) {
806 flags |= IFF_MULTICAST;
807 } else if (strcmp(*argv, "off") == 0) {
808 flags &= ~IFF_MULTICAST;
810 return on_off("multicast");
811 } else if (strcmp(*argv, "allmulticast") == 0) {
813 mask |= IFF_ALLMULTI;
814 if (strcmp(*argv, "on") == 0) {
815 flags |= IFF_ALLMULTI;
816 } else if (strcmp(*argv, "off") == 0) {
817 flags &= ~IFF_ALLMULTI;
819 return on_off("allmulticast");
820 } else if (strcmp(*argv, "promisc") == 0) {
823 if (strcmp(*argv, "on") == 0) {
824 flags |= IFF_PROMISC;
825 } else if (strcmp(*argv, "off") == 0) {
826 flags &= ~IFF_PROMISC;
828 return on_off("promisc");
829 } else if (strcmp(*argv, "trailers") == 0) {
831 mask |= IFF_NOTRAILERS;
832 if (strcmp(*argv, "off") == 0) {
833 flags |= IFF_NOTRAILERS;
834 } else if (strcmp(*argv, "on") == 0) {
835 flags &= ~IFF_NOTRAILERS;
837 return on_off("trailers");
838 } else if (strcmp(*argv, "arp") == 0) {
841 if (strcmp(*argv, "on") == 0) {
843 } else if (strcmp(*argv, "off") == 0) {
846 return on_off("noarp");
847 } else if (matches(*argv, "dynamic") == 0) {
850 if (strcmp(*argv, "on") == 0) {
851 flags |= IFF_DYNAMIC;
852 } else if (strcmp(*argv, "off") == 0) {
853 flags &= ~IFF_DYNAMIC;
855 return on_off("dynamic");
857 if (strcmp(*argv, "dev") == 0) {
860 if (matches(*argv, "help") == 0)
863 duparg2("dev", *argv);
870 fprintf(stderr, "Not enough of information: \"dev\" argument is required.\n");
874 if (newaddr || newbrd) {
875 halen = get_address(dev, &htype);
879 if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0)
883 if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0)
888 if (newname && strcmp(dev, newname)) {
889 if (strlen(newname) == 0)
890 invarg("\"\" is not a valid device identifier\n", "name");
891 if (do_changename(dev, newname) < 0)
896 if (set_qlen(dev, qlen) < 0)
900 if (set_mtu(dev, mtu) < 0)
903 if (newaddr || newbrd) {
905 if (set_address(&ifr1, 1) < 0)
909 if (set_address(&ifr0, 0) < 0)
914 return do_chflags(dev, flags, mask);
917 #endif /* IPLINK_IOCTL_COMPAT */
919 int do_iplink(int argc, char **argv)
922 if (iplink_have_newlink()) {
923 if (matches(*argv, "add") == 0)
924 return iplink_modify(RTM_NEWLINK,
925 NLM_F_CREATE|NLM_F_EXCL,
927 if (matches(*argv, "set") == 0 ||
928 matches(*argv, "change") == 0)
929 return iplink_modify(RTM_NEWLINK, 0,
931 if (matches(*argv, "replace") == 0)
932 return iplink_modify(RTM_NEWLINK,
933 NLM_F_CREATE|NLM_F_REPLACE,
935 if (matches(*argv, "delete") == 0)
936 return iplink_modify(RTM_DELLINK, 0,
939 #if IPLINK_IOCTL_COMPAT
940 if (matches(*argv, "set") == 0)
941 return do_set(argc-1, argv+1);
944 if (matches(*argv, "show") == 0 ||
945 matches(*argv, "lst") == 0 ||
946 matches(*argv, "list") == 0)
947 return ipaddr_list_link(argc-1, argv+1);
948 if (matches(*argv, "help") == 0)
951 return ipaddr_list_link(0, NULL);
953 fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n", *argv);