1 /*
2 * iplink.c "ip link".
3 *
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.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <syslog.h>
17 #include <fcntl.h>
18 #include <dlfcn.h>
19 #include <errno.h>
20 #include <sys/socket.h>
21 #include <linux/if.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>
27 #include <string.h>
28 #include <sys/ioctl.h>
29 #include <linux/sockios.h>
30
31 #include "rt_names.h"
32 #include "utils.h"
33 #include "ip_common.h"
34
35 #define IPLINK_IOCTL_COMPAT 1
36 #ifndef LIBDIR
37 #define LIBDIR "/usr/lib/"
38 #endif
39
40 static void usage(void) __attribute__((noreturn));
41 static int iplink_have_newlink(void);
42
iplink_usage(void)43 void iplink_usage(void)
44 {
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 DEVICE [ { up | down } ]\n");
55 } else
56 fprintf(stderr, "Usage: ip link set DEVICE [ { up | down } ]\n");
57
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, " [ alias NAME ]\n");
71 fprintf(stderr, " ip link show [ DEVICE ]\n");
72
73 if (iplink_have_newlink()) {
74 fprintf(stderr, "\n");
75 fprintf(stderr, "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | can }\n");
76 }
77 exit(-1);
78 }
79
usage(void)80 static void usage(void)
81 {
82 iplink_usage();
83 }
84
on_off(char * msg)85 static int on_off(char *msg)
86 {
87 fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg);
88 return -1;
89 }
90
91 static void *BODY; /* cached dlopen(NULL) handle */
92 static struct link_util *linkutil_list;
93
get_link_kind(const char * id)94 struct link_util *get_link_kind(const char *id)
95 {
96 void *dlh;
97 char buf[256];
98 struct link_util *l;
99
100 for (l = linkutil_list; l; l = l->next)
101 if (strcmp(l->id, id) == 0)
102 return l;
103
104 snprintf(buf, sizeof(buf), LIBDIR "/ip/link_%s.so", id);
105 dlh = dlopen(buf, RTLD_LAZY);
106 if (dlh == NULL) {
107 /* look in current binary, only open once */
108 dlh = BODY;
109 if (dlh == NULL) {
110 dlh = BODY = dlopen(NULL, RTLD_LAZY);
111 if (dlh == NULL)
112 return NULL;
113 }
114 }
115
116 snprintf(buf, sizeof(buf), "%s_link_util", id);
117 l = dlsym(dlh, buf);
118 if (l == NULL)
119 return NULL;
120
121 l->next = linkutil_list;
122 linkutil_list = l;
123 return l;
124 }
125
126 #if IPLINK_IOCTL_COMPAT
127 static int have_rtnl_newlink = -1;
128
accept_msg(const struct sockaddr_nl * who,struct nlmsghdr * n,void * arg)129 static int accept_msg(const struct sockaddr_nl *who,
130 struct nlmsghdr *n, void *arg)
131 {
132 struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n);
133
134 if (n->nlmsg_type == NLMSG_ERROR &&
135 (err->error == -EOPNOTSUPP || err->error == -EINVAL))
136 have_rtnl_newlink = 0;
137 else
138 have_rtnl_newlink = 1;
139 return -1;
140 }
141
iplink_have_newlink(void)142 static int iplink_have_newlink(void)
143 {
144 struct {
145 struct nlmsghdr n;
146 struct ifinfomsg i;
147 char buf[1024];
148 } req;
149
150 if (have_rtnl_newlink < 0) {
151 memset(&req, 0, sizeof(req));
152
153 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
154 req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
155 req.n.nlmsg_type = RTM_NEWLINK;
156 req.i.ifi_family = AF_UNSPEC;
157
158 rtnl_send(&rth, (char *)&req.n, req.n.nlmsg_len);
159 rtnl_listen(&rth, accept_msg, NULL);
160 }
161 return have_rtnl_newlink;
162 }
163 #else /* IPLINK_IOCTL_COMPAT */
iplink_have_newlink(void)164 static int iplink_have_newlink(void)
165 {
166 return 1;
167 }
168 #endif /* ! IPLINK_IOCTL_COMPAT */
169
170 struct iplink_req {
171 struct nlmsghdr n;
172 struct ifinfomsg i;
173 char buf[1024];
174 };
175
iplink_parse(int argc,char ** argv,struct iplink_req * req,char ** name,char ** type,char ** link,char ** dev)176 int iplink_parse(int argc, char **argv, struct iplink_req *req,
177 char **name, char **type, char **link, char **dev)
178 {
179 int ret, len;
180 char abuf[32];
181 int qlen = -1;
182 int mtu = -1;
183 int netns = -1;
184
185 ret = argc;
186
187 while (argc > 0) {
188 if (strcmp(*argv, "up") == 0) {
189 req->i.ifi_change |= IFF_UP;
190 req->i.ifi_flags |= IFF_UP;
191 } else if (strcmp(*argv, "down") == 0) {
192 req->i.ifi_change |= IFF_UP;
193 req->i.ifi_flags &= ~IFF_UP;
194 } else if (strcmp(*argv, "name") == 0) {
195 NEXT_ARG();
196 *name = *argv;
197 } else if (matches(*argv, "link") == 0) {
198 NEXT_ARG();
199 *link = *argv;
200 } else if (matches(*argv, "address") == 0) {
201 NEXT_ARG();
202 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
203 if (len < 0)
204 return -1;
205 addattr_l(&req->n, sizeof(*req), IFLA_ADDRESS, abuf, len);
206 } else if (matches(*argv, "broadcast") == 0 ||
207 strcmp(*argv, "brd") == 0) {
208 NEXT_ARG();
209 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
210 if (len < 0)
211 return -1;
212 addattr_l(&req->n, sizeof(*req), IFLA_BROADCAST, abuf, len);
213 } else if (matches(*argv, "txqueuelen") == 0 ||
214 strcmp(*argv, "qlen") == 0 ||
215 matches(*argv, "txqlen") == 0) {
216 NEXT_ARG();
217 if (qlen != -1)
218 duparg("txqueuelen", *argv);
219 if (get_integer(&qlen, *argv, 0))
220 invarg("Invalid \"txqueuelen\" value\n", *argv);
221 addattr_l(&req->n, sizeof(*req), IFLA_TXQLEN, &qlen, 4);
222 } else if (strcmp(*argv, "mtu") == 0) {
223 NEXT_ARG();
224 if (mtu != -1)
225 duparg("mtu", *argv);
226 if (get_integer(&mtu, *argv, 0))
227 invarg("Invalid \"mtu\" value\n", *argv);
228 addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4);
229 } else if (strcmp(*argv, "netns") == 0) {
230 NEXT_ARG();
231 if (netns != -1)
232 duparg("netns", *argv);
233 if (get_integer(&netns, *argv, 0))
234 invarg("Invalid \"netns\" value\n", *argv);
235 addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_PID, &netns, 4);
236 } else if (strcmp(*argv, "multicast") == 0) {
237 NEXT_ARG();
238 req->i.ifi_change |= IFF_MULTICAST;
239 if (strcmp(*argv, "on") == 0) {
240 req->i.ifi_flags |= IFF_MULTICAST;
241 } else if (strcmp(*argv, "off") == 0) {
242 req->i.ifi_flags &= ~IFF_MULTICAST;
243 } else
244 return on_off("multicast");
245 } else if (strcmp(*argv, "allmulticast") == 0) {
246 NEXT_ARG();
247 req->i.ifi_change |= IFF_ALLMULTI;
248 if (strcmp(*argv, "on") == 0) {
249 req->i.ifi_flags |= IFF_ALLMULTI;
250 } else if (strcmp(*argv, "off") == 0) {
251 req->i.ifi_flags &= ~IFF_ALLMULTI;
252 } else
253 return on_off("allmulticast");
254 } else if (strcmp(*argv, "promisc") == 0) {
255 NEXT_ARG();
256 req->i.ifi_change |= IFF_PROMISC;
257 if (strcmp(*argv, "on") == 0) {
258 req->i.ifi_flags |= IFF_PROMISC;
259 } else if (strcmp(*argv, "off") == 0) {
260 req->i.ifi_flags &= ~IFF_PROMISC;
261 } else
262 return on_off("promisc");
263 } else if (strcmp(*argv, "trailers") == 0) {
264 NEXT_ARG();
265 req->i.ifi_change |= IFF_NOTRAILERS;
266 if (strcmp(*argv, "off") == 0) {
267 req->i.ifi_flags |= IFF_NOTRAILERS;
268 } else if (strcmp(*argv, "on") == 0) {
269 req->i.ifi_flags &= ~IFF_NOTRAILERS;
270 } else
271 return on_off("trailers");
272 } else if (strcmp(*argv, "arp") == 0) {
273 NEXT_ARG();
274 req->i.ifi_change |= IFF_NOARP;
275 if (strcmp(*argv, "on") == 0) {
276 req->i.ifi_flags &= ~IFF_NOARP;
277 } else if (strcmp(*argv, "off") == 0) {
278 req->i.ifi_flags |= IFF_NOARP;
279 } else
280 return on_off("noarp");
281 #ifdef IFF_DYNAMIC
282 } else if (matches(*argv, "dynamic") == 0) {
283 NEXT_ARG();
284 req->i.ifi_change |= IFF_DYNAMIC;
285 if (strcmp(*argv, "on") == 0) {
286 req->i.ifi_flags |= IFF_DYNAMIC;
287 } else if (strcmp(*argv, "off") == 0) {
288 req->i.ifi_flags &= ~IFF_DYNAMIC;
289 } else
290 return on_off("dynamic");
291 #endif
292 } else if (matches(*argv, "type") == 0) {
293 NEXT_ARG();
294 *type = *argv;
295 argc--; argv++;
296 break;
297 } else if (matches(*argv, "alias") == 0) {
298 NEXT_ARG();
299 addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
300 *argv, strlen(*argv));
301 argc--; argv++;
302 break;
303 } else {
304 if (strcmp(*argv, "dev") == 0) {
305 NEXT_ARG();
306 }
307 if (matches(*argv, "help") == 0)
308 usage();
309 if (*dev)
310 duparg2("dev", *argv);
311 *dev = *argv;
312 }
313 argc--; argv++;
314 }
315
316 return ret - argc;
317 }
318
iplink_modify(int cmd,unsigned int flags,int argc,char ** argv)319 static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
320 {
321 int len;
322 char *dev = NULL;
323 char *name = NULL;
324 char *link = NULL;
325 char *type = NULL;
326 struct link_util *lu = NULL;
327 struct iplink_req req;
328 int ret;
329
330 memset(&req, 0, sizeof(req));
331
332 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
333 req.n.nlmsg_flags = NLM_F_REQUEST|flags;
334 req.n.nlmsg_type = cmd;
335 req.i.ifi_family = preferred_family;
336
337 ret = iplink_parse(argc, argv, &req, &name, &type, &link, &dev);
338 if (ret < 0)
339 return ret;
340
341 argc -= ret;
342 argv += ret;
343 ll_init_map(&rth);
344
345 if (type) {
346 struct rtattr *linkinfo = NLMSG_TAIL(&req.n);
347 addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
348 addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
349 strlen(type));
350
351 lu = get_link_kind(type);
352 if (lu && argc) {
353 struct rtattr * data = NLMSG_TAIL(&req.n);
354 addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0);
355
356 if (lu->parse_opt &&
357 lu->parse_opt(lu, argc, argv, &req.n))
358 return -1;
359
360 data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data;
361 } else if (argc) {
362 if (matches(*argv, "help") == 0)
363 usage();
364 fprintf(stderr, "Garbage instead of arguments \"%s ...\". "
365 "Try \"ip link help\".\n", *argv);
366 return -1;
367 }
368 linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
369 } else if (flags & NLM_F_CREATE) {
370 fprintf(stderr, "Not enough information: \"type\" argument "
371 "is required\n");
372 return -1;
373 }
374
375 if (!(flags & NLM_F_CREATE)) {
376 if (!dev) {
377 fprintf(stderr, "Not enough information: \"dev\" "
378 "argument is required.\n");
379 exit(-1);
380 }
381
382 req.i.ifi_index = ll_name_to_index(dev);
383 if (req.i.ifi_index == 0) {
384 fprintf(stderr, "Cannot find device \"%s\"\n", dev);
385 return -1;
386 }
387 } else {
388 /* Allow "ip link add dev" and "ip link add name" */
389 if (!name)
390 name = dev;
391
392 if (link) {
393 int ifindex;
394
395 ifindex = ll_name_to_index(link);
396 if (ifindex == 0) {
397 fprintf(stderr, "Cannot find device \"%s\"\n",
398 link);
399 return -1;
400 }
401 addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4);
402 }
403 }
404
405 if (name) {
406 len = strlen(name) + 1;
407 if (len == 1)
408 invarg("\"\" is not a valid device identifier\n", "name");
409 if (len > IFNAMSIZ)
410 invarg("\"name\" too long\n", name);
411 addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len);
412 }
413
414 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
415 exit(2);
416
417 return 0;
418 }
419
420 #if IPLINK_IOCTL_COMPAT
get_ctl_fd(void)421 static int get_ctl_fd(void)
422 {
423 int s_errno;
424 int fd;
425
426 fd = socket(PF_INET, SOCK_DGRAM, 0);
427 if (fd >= 0)
428 return fd;
429 s_errno = errno;
430 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
431 if (fd >= 0)
432 return fd;
433 fd = socket(PF_INET6, SOCK_DGRAM, 0);
434 if (fd >= 0)
435 return fd;
436 errno = s_errno;
437 perror("Cannot create control socket");
438 return -1;
439 }
440
do_chflags(const char * dev,__u32 flags,__u32 mask)441 static int do_chflags(const char *dev, __u32 flags, __u32 mask)
442 {
443 struct ifreq ifr;
444 int fd;
445 int err;
446
447 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
448 fd = get_ctl_fd();
449 if (fd < 0)
450 return -1;
451 err = ioctl(fd, SIOCGIFFLAGS, &ifr);
452 if (err) {
453 perror("SIOCGIFFLAGS");
454 close(fd);
455 return -1;
456 }
457 if ((ifr.ifr_flags^flags)&mask) {
458 ifr.ifr_flags &= ~mask;
459 ifr.ifr_flags |= mask&flags;
460 err = ioctl(fd, SIOCSIFFLAGS, &ifr);
461 if (err)
462 perror("SIOCSIFFLAGS");
463 }
464 close(fd);
465 return err;
466 }
467
do_changename(const char * dev,const char * newdev)468 static int do_changename(const char *dev, const char *newdev)
469 {
470 struct ifreq ifr;
471 int fd;
472 int err;
473
474 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
475 strncpy(ifr.ifr_newname, newdev, IFNAMSIZ);
476 fd = get_ctl_fd();
477 if (fd < 0)
478 return -1;
479 err = ioctl(fd, SIOCSIFNAME, &ifr);
480 if (err) {
481 perror("SIOCSIFNAME");
482 close(fd);
483 return -1;
484 }
485 close(fd);
486 return err;
487 }
488
set_qlen(const char * dev,int qlen)489 static int set_qlen(const char *dev, int qlen)
490 {
491 struct ifreq ifr;
492 int s;
493
494 s = get_ctl_fd();
495 if (s < 0)
496 return -1;
497
498 memset(&ifr, 0, sizeof(ifr));
499 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
500 ifr.ifr_qlen = qlen;
501 if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
502 perror("SIOCSIFXQLEN");
503 close(s);
504 return -1;
505 }
506 close(s);
507
508 return 0;
509 }
510
set_mtu(const char * dev,int mtu)511 static int set_mtu(const char *dev, int mtu)
512 {
513 struct ifreq ifr;
514 int s;
515
516 s = get_ctl_fd();
517 if (s < 0)
518 return -1;
519
520 memset(&ifr, 0, sizeof(ifr));
521 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
522 ifr.ifr_mtu = mtu;
523 if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
524 perror("SIOCSIFMTU");
525 close(s);
526 return -1;
527 }
528 close(s);
529
530 return 0;
531 }
532
get_address(const char * dev,int * htype)533 static int get_address(const char *dev, int *htype)
534 {
535 struct ifreq ifr;
536 struct sockaddr_ll me;
537 socklen_t alen;
538 int s;
539
540 s = socket(PF_PACKET, SOCK_DGRAM, 0);
541 if (s < 0) {
542 perror("socket(PF_PACKET)");
543 return -1;
544 }
545
546 memset(&ifr, 0, sizeof(ifr));
547 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
548 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
549 perror("SIOCGIFINDEX");
550 close(s);
551 return -1;
552 }
553
554 memset(&me, 0, sizeof(me));
555 me.sll_family = AF_PACKET;
556 me.sll_ifindex = ifr.ifr_ifindex;
557 me.sll_protocol = htons(ETH_P_LOOP);
558 if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {
559 perror("bind");
560 close(s);
561 return -1;
562 }
563
564 alen = sizeof(me);
565 if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
566 perror("getsockname");
567 close(s);
568 return -1;
569 }
570 close(s);
571 *htype = me.sll_hatype;
572 return me.sll_halen;
573 }
574
parse_address(const char * dev,int hatype,int halen,char * lla,struct ifreq * ifr)575 static int parse_address(const char *dev, int hatype, int halen,
576 char *lla, struct ifreq *ifr)
577 {
578 int alen;
579
580 memset(ifr, 0, sizeof(*ifr));
581 strncpy(ifr->ifr_name, dev, IFNAMSIZ);
582 ifr->ifr_hwaddr.sa_family = hatype;
583 alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
584 if (alen < 0)
585 return -1;
586 if (alen != halen) {
587 fprintf(stderr, "Wrong address (%s) length: expected %d bytes\n", lla, halen);
588 return -1;
589 }
590 return 0;
591 }
592
set_address(struct ifreq * ifr,int brd)593 static int set_address(struct ifreq *ifr, int brd)
594 {
595 int s;
596
597 s = get_ctl_fd();
598 if (s < 0)
599 return -1;
600 if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
601 perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
602 close(s);
603 return -1;
604 }
605 close(s);
606 return 0;
607 }
608
609
do_set(int argc,char ** argv)610 static int do_set(int argc, char **argv)
611 {
612 char *dev = NULL;
613 __u32 mask = 0;
614 __u32 flags = 0;
615 int qlen = -1;
616 int mtu = -1;
617 char *newaddr = NULL;
618 char *newbrd = NULL;
619 struct ifreq ifr0, ifr1;
620 char *newname = NULL;
621 int htype, halen;
622
623 while (argc > 0) {
624 if (strcmp(*argv, "up") == 0) {
625 mask |= IFF_UP;
626 flags |= IFF_UP;
627 } else if (strcmp(*argv, "down") == 0) {
628 mask |= IFF_UP;
629 flags &= ~IFF_UP;
630 } else if (strcmp(*argv, "name") == 0) {
631 NEXT_ARG();
632 newname = *argv;
633 } else if (matches(*argv, "address") == 0) {
634 NEXT_ARG();
635 newaddr = *argv;
636 } else if (matches(*argv, "broadcast") == 0 ||
637 strcmp(*argv, "brd") == 0) {
638 NEXT_ARG();
639 newbrd = *argv;
640 } else if (matches(*argv, "txqueuelen") == 0 ||
641 strcmp(*argv, "qlen") == 0 ||
642 matches(*argv, "txqlen") == 0) {
643 NEXT_ARG();
644 if (qlen != -1)
645 duparg("txqueuelen", *argv);
646 if (get_integer(&qlen, *argv, 0))
647 invarg("Invalid \"txqueuelen\" value\n", *argv);
648 } else if (strcmp(*argv, "mtu") == 0) {
649 NEXT_ARG();
650 if (mtu != -1)
651 duparg("mtu", *argv);
652 if (get_integer(&mtu, *argv, 0))
653 invarg("Invalid \"mtu\" value\n", *argv);
654 } else if (strcmp(*argv, "multicast") == 0) {
655 NEXT_ARG();
656 mask |= IFF_MULTICAST;
657 if (strcmp(*argv, "on") == 0) {
658 flags |= IFF_MULTICAST;
659 } else if (strcmp(*argv, "off") == 0) {
660 flags &= ~IFF_MULTICAST;
661 } else
662 return on_off("multicast");
663 } else if (strcmp(*argv, "allmulticast") == 0) {
664 NEXT_ARG();
665 mask |= IFF_ALLMULTI;
666 if (strcmp(*argv, "on") == 0) {
667 flags |= IFF_ALLMULTI;
668 } else if (strcmp(*argv, "off") == 0) {
669 flags &= ~IFF_ALLMULTI;
670 } else
671 return on_off("allmulticast");
672 } else if (strcmp(*argv, "promisc") == 0) {
673 NEXT_ARG();
674 mask |= IFF_PROMISC;
675 if (strcmp(*argv, "on") == 0) {
676 flags |= IFF_PROMISC;
677 } else if (strcmp(*argv, "off") == 0) {
678 flags &= ~IFF_PROMISC;
679 } else
680 return on_off("promisc");
681 } else if (strcmp(*argv, "trailers") == 0) {
682 NEXT_ARG();
683 mask |= IFF_NOTRAILERS;
684 if (strcmp(*argv, "off") == 0) {
685 flags |= IFF_NOTRAILERS;
686 } else if (strcmp(*argv, "on") == 0) {
687 flags &= ~IFF_NOTRAILERS;
688 } else
689 return on_off("trailers");
690 } else if (strcmp(*argv, "arp") == 0) {
691 NEXT_ARG();
692 mask |= IFF_NOARP;
693 if (strcmp(*argv, "on") == 0) {
694 flags &= ~IFF_NOARP;
695 } else if (strcmp(*argv, "off") == 0) {
696 flags |= IFF_NOARP;
697 } else
698 return on_off("noarp");
699 #ifdef IFF_DYNAMIC
700 } else if (matches(*argv, "dynamic") == 0) {
701 NEXT_ARG();
702 mask |= IFF_DYNAMIC;
703 if (strcmp(*argv, "on") == 0) {
704 flags |= IFF_DYNAMIC;
705 } else if (strcmp(*argv, "off") == 0) {
706 flags &= ~IFF_DYNAMIC;
707 } else
708 return on_off("dynamic");
709 #endif
710 } else {
711 if (strcmp(*argv, "dev") == 0) {
712 NEXT_ARG();
713 }
714 if (matches(*argv, "help") == 0)
715 usage();
716 if (dev)
717 duparg2("dev", *argv);
718 dev = *argv;
719 }
720 argc--; argv++;
721 }
722
723 if (!dev) {
724 fprintf(stderr, "Not enough of information: \"dev\" argument is required.\n");
725 exit(-1);
726 }
727
728 if (newaddr || newbrd) {
729 halen = get_address(dev, &htype);
730 if (halen < 0)
731 return -1;
732 if (newaddr) {
733 if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0)
734 return -1;
735 }
736 if (newbrd) {
737 if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0)
738 return -1;
739 }
740 }
741
742 if (newname && strcmp(dev, newname)) {
743 if (strlen(newname) == 0)
744 invarg("\"\" is not a valid device identifier\n", "name");
745 if (do_changename(dev, newname) < 0)
746 return -1;
747 dev = newname;
748 }
749 if (qlen != -1) {
750 if (set_qlen(dev, qlen) < 0)
751 return -1;
752 }
753 if (mtu != -1) {
754 if (set_mtu(dev, mtu) < 0)
755 return -1;
756 }
757 if (newaddr || newbrd) {
758 if (newbrd) {
759 if (set_address(&ifr1, 1) < 0)
760 return -1;
761 }
762 if (newaddr) {
763 if (set_address(&ifr0, 0) < 0)
764 return -1;
765 }
766 }
767 if (mask)
768 return do_chflags(dev, flags, mask);
769 return 0;
770 }
771 #endif /* IPLINK_IOCTL_COMPAT */
772
do_iplink(int argc,char ** argv)773 int do_iplink(int argc, char **argv)
774 {
775 if (argc > 0) {
776 if (iplink_have_newlink()) {
777 if (matches(*argv, "add") == 0)
778 return iplink_modify(RTM_NEWLINK,
779 NLM_F_CREATE|NLM_F_EXCL,
780 argc-1, argv+1);
781 if (matches(*argv, "set") == 0 ||
782 matches(*argv, "change") == 0)
783 return iplink_modify(RTM_NEWLINK, 0,
784 argc-1, argv+1);
785 if (matches(*argv, "replace") == 0)
786 return iplink_modify(RTM_NEWLINK,
787 NLM_F_CREATE|NLM_F_REPLACE,
788 argc-1, argv+1);
789 if (matches(*argv, "delete") == 0)
790 return iplink_modify(RTM_DELLINK, 0,
791 argc-1, argv+1);
792 } else {
793 #if IPLINK_IOCTL_COMPAT
794 if (matches(*argv, "set") == 0)
795 return do_set(argc-1, argv+1);
796 #endif
797 }
798 if (matches(*argv, "show") == 0 ||
799 matches(*argv, "lst") == 0 ||
800 matches(*argv, "list") == 0)
801 return ipaddr_list_link(argc-1, argv+1);
802 if (matches(*argv, "help") == 0)
803 usage();
804 } else
805 return ipaddr_list_link(0, NULL);
806
807 fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n", *argv);
808 exit(-1);
809 }
810