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iproute2: support listing devices by group
[mirror_iproute2.git] / ip / iplink.c
CommitLineData
aba5acdf
SH		 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>
1d934839 18#include <dlfcn.h>
aba5acdf
SH		 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
1d934839 35#define IPLINK_IOCTL_COMPAT 1
5e3bb534
AH		 36#ifndef LIBDIR
37#define LIBDIR "/usr/lib/"
b514b358 38#endif
aba5acdf
SH		 39
40static void usage(void) __attribute__((noreturn));
750a405a 41static int iplink_have_newlink(void);
aba5acdf
SH		 42
43void iplink_usage(void)
44{
750a405a
SH		 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");
ace9c961 70 fprintf(stderr, " [ alias NAME ]\n");
ae7229d5
WM		 71 fprintf(stderr, " [ vf NUM [ mac LLADDR ]\n");
72 fprintf(stderr, " [ vlan VLANID [ qos VLAN-QOS ] ]\n");
1598b9ef 73 fprintf(stderr, " [ rate TXRATE ] ] \n");
ac694c33 74 fprintf(stderr, " ip link show [ DEVICE | group GROUP ]\n");
750a405a
SH		 75
76 if (iplink_have_newlink()) {
77 fprintf(stderr, "\n");
5a204478 78 fprintf(stderr, "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | can }\n");
750a405a 79 }
aba5acdf
SH		 80 exit(-1);
81}
82
83static void usage(void)
84{
85 iplink_usage();
86}
87
88static int on_off(char *msg)
89{
90 fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg);
91 return -1;
92}
93
1d934839
PM		 94static void *BODY; /* cached dlopen(NULL) handle */
95static struct link_util *linkutil_list;
96
97struct link_util *get_link_kind(const char *id)
98{
99 void *dlh;
100 char buf[256];
101 struct link_util *l;
102
103 for (l = linkutil_list; l; l = l->next)
104 if (strcmp(l->id, id) == 0)
105 return l;
106
5e3bb534 107 snprintf(buf, sizeof(buf), LIBDIR "/ip/link_%s.so", id);
1d934839
PM		 108 dlh = dlopen(buf, RTLD_LAZY);
109 if (dlh == NULL) {
110 /* look in current binary, only open once */
111 dlh = BODY;
112 if (dlh == NULL) {
113 dlh = BODY = dlopen(NULL, RTLD_LAZY);
114 if (dlh == NULL)
115 return NULL;
116 }
117 }
118
119 snprintf(buf, sizeof(buf), "%s_link_util", id);
120 l = dlsym(dlh, buf);
121 if (l == NULL)
122 return NULL;
123
124 l->next = linkutil_list;
125 linkutil_list = l;
126 return l;
127}
128
129#if IPLINK_IOCTL_COMPAT
130static int have_rtnl_newlink = -1;
131
132static int accept_msg(const struct sockaddr_nl *who,
133 struct nlmsghdr *n, void *arg)
134{
135 struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n);
136
66e529f5
PM		 137 if (n->nlmsg_type == NLMSG_ERROR &&
138 (err->error == -EOPNOTSUPP || err->error == -EINVAL))
1d934839
PM		 139 have_rtnl_newlink = 0;
140 else
141 have_rtnl_newlink = 1;
142 return -1;
143}
144
145static int iplink_have_newlink(void)
146{
147 struct {
148 struct nlmsghdr n;
149 struct ifinfomsg i;
150 char buf[1024];
151 } req;
152
153 if (have_rtnl_newlink < 0) {
154 memset(&req, 0, sizeof(req));
155
156 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
157 req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
158 req.n.nlmsg_type = RTM_NEWLINK;
159 req.i.ifi_family = AF_UNSPEC;
160
161 rtnl_send(&rth, (char *)&req.n, req.n.nlmsg_len);
162 rtnl_listen(&rth, accept_msg, NULL);
163 }
164 return have_rtnl_newlink;
165}
166#else /* IPLINK_IOCTL_COMPAT */
167static int iplink_have_newlink(void)
168{
169 return 1;
170}
171#endif /* ! IPLINK_IOCTL_COMPAT */
172
909dfe2c
PE		 173struct iplink_req {
174 struct nlmsghdr n;
175 struct ifinfomsg i;
176 char buf[1024];
177};
178
1598b9ef
SH		 179int iplink_parse_vf(int vf, int *argcp, char ***argvp,
180 struct iplink_req *req)
3fd86630
CW		 181{
182 int len, argc = *argcp;
183 char **argv = *argvp;
184 struct rtattr *vfinfo;
1598b9ef
SH		 185
186 vfinfo = addattr_nest(&req->n, sizeof(*req), IFLA_VF_INFO);
3fd86630
CW		 187
188 while (NEXT_ARG_OK()) {
189 NEXT_ARG();
1598b9ef
SH		 190 if (matches(*argv, "mac") == 0) {
191 struct ifla_vf_mac ivm;
3fd86630 192 NEXT_ARG();
1598b9ef
SH		 193 ivm.vf = vf;
194 len = ll_addr_a2n((char *)ivm.mac, 32, *argv);
195 if (len < 0)
196 return -1;
197 addattr_l(&req->n, sizeof(*req), IFLA_VF_MAC, &ivm, sizeof(ivm));
3fd86630 198 } else if (matches(*argv, "vlan") == 0) {
1598b9ef 199 struct ifla_vf_vlan ivv;
3fd86630 200 NEXT_ARG();
1598b9ef
SH		 201 if (get_unsigned(&ivv.vlan, *argv, 0)) {
202 invarg("Invalid \"vlan\" value\n", *argv);
203 }
204 ivv.vf = vf;
205 ivv.qos = 0;
3fd86630
CW		 206 if (NEXT_ARG_OK()) {
207 NEXT_ARG();
208 if (matches(*argv, "qos") == 0) {
209 NEXT_ARG();
1598b9ef
SH		 210 if (get_unsigned(&ivv.qos, *argv, 0)) {
211 invarg("Invalid \"qos\" value\n", *argv);
212 }
3fd86630
CW		 213 } else {
214 /* rewind arg */
215 PREV_ARG();
216 }
217 }
1598b9ef 218 addattr_l(&req->n, sizeof(*req), IFLA_VF_VLAN, &ivv, sizeof(ivv));
3fd86630 219 } else if (matches(*argv, "rate") == 0) {
1598b9ef 220 struct ifla_vf_tx_rate ivt;
3fd86630 221 NEXT_ARG();
1598b9ef
SH		 222 if (get_unsigned(&ivt.rate, *argv, 0)) {
223 invarg("Invalid \"rate\" value\n", *argv);
224 }
225 ivt.vf = vf;
226 addattr_l(&req->n, sizeof(*req), IFLA_VF_TX_RATE, &ivt, sizeof(ivt));
227
3fd86630
CW		 228 } else {
229 /* rewind arg */
230 PREV_ARG();
231 break;
232 }
233 }
234
235 if (argc == *argcp)
236 incomplete_command();
237
1598b9ef 238 addattr_nest_end(&req->n, vfinfo);
3fd86630
CW		 239
240 *argcp = argc;
241 *argvp = argv;
1598b9ef 242 return 0;
3fd86630
CW		 243}
244
245
909dfe2c
PE		 246int iplink_parse(int argc, char **argv, struct iplink_req *req,
247 char **name, char **type, char **link, char **dev)
1d934839 248{
909dfe2c
PE		 249 int ret, len;
250 char abuf[32];
1d934839
PM		 251 int qlen = -1;
252 int mtu = -1;
e2613dc8 253 int netns = -1;
ae7229d5 254 int vf = -1;
1d934839 255
909dfe2c 256 ret = argc;
1d934839
PM		 257
258 while (argc > 0) {
259 if (strcmp(*argv, "up") == 0) {
909dfe2c
PE		 260 req->i.ifi_change |= IFF_UP;
261 req->i.ifi_flags |= IFF_UP;
1d934839 262 } else if (strcmp(*argv, "down") == 0) {
909dfe2c
PE		 263 req->i.ifi_change |= IFF_UP;
264 req->i.ifi_flags &= ~IFF_UP;
1d934839
PM		 265 } else if (strcmp(*argv, "name") == 0) {
266 NEXT_ARG();
909dfe2c 267 *name = *argv;
1d934839
PM		 268 } else if (matches(*argv, "link") == 0) {
269 NEXT_ARG();
909dfe2c 270 *link = *argv;
1d934839
PM		 271 } else if (matches(*argv, "address") == 0) {
272 NEXT_ARG();
273 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
cb2eb999
AH		 274 if (len < 0)
275 return -1;
909dfe2c 276 addattr_l(&req->n, sizeof(*req), IFLA_ADDRESS, abuf, len);
1d934839 277 } else if (matches(*argv, "broadcast") == 0 ||
909dfe2c 278 strcmp(*argv, "brd") == 0) {
1d934839
PM		 279 NEXT_ARG();
280 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
cb2eb999
AH		 281 if (len < 0)
282 return -1;
909dfe2c 283 addattr_l(&req->n, sizeof(*req), IFLA_BROADCAST, abuf, len);
1d934839 284 } else if (matches(*argv, "txqueuelen") == 0 ||
909dfe2c
PE		 285 strcmp(*argv, "qlen") == 0 ||
286 matches(*argv, "txqlen") == 0) {
1d934839
PM		 287 NEXT_ARG();
288 if (qlen != -1)
289 duparg("txqueuelen", *argv);
290 if (get_integer(&qlen, *argv, 0))
291 invarg("Invalid \"txqueuelen\" value\n", *argv);
909dfe2c 292 addattr_l(&req->n, sizeof(*req), IFLA_TXQLEN, &qlen, 4);
1d934839
PM		 293 } else if (strcmp(*argv, "mtu") == 0) {
294 NEXT_ARG();
295 if (mtu != -1)
296 duparg("mtu", *argv);
297 if (get_integer(&mtu, *argv, 0))
298 invarg("Invalid \"mtu\" value\n", *argv);
909dfe2c 299 addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4);
e2613dc8
BT		 300 } else if (strcmp(*argv, "netns") == 0) {
301 NEXT_ARG();
302 if (netns != -1)
303 duparg("netns", *argv);
304 if (get_integer(&netns, *argv, 0))
305 invarg("Invalid \"netns\" value\n", *argv);
306 addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_PID, &netns, 4);
1d934839
PM		 307 } else if (strcmp(*argv, "multicast") == 0) {
308 NEXT_ARG();
909dfe2c 309 req->i.ifi_change |= IFF_MULTICAST;
1d934839 310 if (strcmp(*argv, "on") == 0) {
909dfe2c 311 req->i.ifi_flags |= IFF_MULTICAST;
1d934839 312 } else if (strcmp(*argv, "off") == 0) {
909dfe2c 313 req->i.ifi_flags &= ~IFF_MULTICAST;
1d934839
PM		 314 } else
315 return on_off("multicast");
316 } else if (strcmp(*argv, "allmulticast") == 0) {
317 NEXT_ARG();
909dfe2c 318 req->i.ifi_change |= IFF_ALLMULTI;
1d934839 319 if (strcmp(*argv, "on") == 0) {
909dfe2c 320 req->i.ifi_flags |= IFF_ALLMULTI;
1d934839 321 } else if (strcmp(*argv, "off") == 0) {
909dfe2c 322 req->i.ifi_flags &= ~IFF_ALLMULTI;
1d934839
PM		 323 } else
324 return on_off("allmulticast");
325 } else if (strcmp(*argv, "promisc") == 0) {
326 NEXT_ARG();
909dfe2c 327 req->i.ifi_change |= IFF_PROMISC;
1d934839 328 if (strcmp(*argv, "on") == 0) {
909dfe2c 329 req->i.ifi_flags |= IFF_PROMISC;
1d934839 330 } else if (strcmp(*argv, "off") == 0) {
909dfe2c 331 req->i.ifi_flags &= ~IFF_PROMISC;
1d934839
PM		 332 } else
333 return on_off("promisc");
334 } else if (strcmp(*argv, "trailers") == 0) {
335 NEXT_ARG();
909dfe2c 336 req->i.ifi_change |= IFF_NOTRAILERS;
1d934839 337 if (strcmp(*argv, "off") == 0) {
909dfe2c 338 req->i.ifi_flags |= IFF_NOTRAILERS;
1d934839 339 } else if (strcmp(*argv, "on") == 0) {
909dfe2c 340 req->i.ifi_flags &= ~IFF_NOTRAILERS;
1d934839
PM		 341 } else
342 return on_off("trailers");
343 } else if (strcmp(*argv, "arp") == 0) {
344 NEXT_ARG();
909dfe2c 345 req->i.ifi_change |= IFF_NOARP;
1d934839 346 if (strcmp(*argv, "on") == 0) {
909dfe2c 347 req->i.ifi_flags &= ~IFF_NOARP;
1d934839 348 } else if (strcmp(*argv, "off") == 0) {
909dfe2c 349 req->i.ifi_flags |= IFF_NOARP;
1d934839
PM		 350 } else
351 return on_off("noarp");
ae7229d5 352 } else if (strcmp(*argv, "vf") == 0) {
1598b9ef 353 struct rtattr *vflist;
ae7229d5
WM		 354 NEXT_ARG();
355 if (get_integer(&vf, *argv, 0)) {
356 invarg("Invalid \"vf\" value\n", *argv);
357 }
1598b9ef
SH		 358 vflist = addattr_nest(&req->n, sizeof(*req),
359 IFLA_VFINFO_LIST);
360 len = iplink_parse_vf(vf, &argc, &argv, req);
361 if (len < 0)
362 return -1;
363 addattr_nest_end(&req->n, vflist);
1d934839
PM		 364#ifdef IFF_DYNAMIC
365 } else if (matches(*argv, "dynamic") == 0) {
366 NEXT_ARG();
909dfe2c 367 req->i.ifi_change |= IFF_DYNAMIC;
1d934839 368 if (strcmp(*argv, "on") == 0) {
909dfe2c 369 req->i.ifi_flags |= IFF_DYNAMIC;
1d934839 370 } else if (strcmp(*argv, "off") == 0) {
909dfe2c 371 req->i.ifi_flags &= ~IFF_DYNAMIC;
1d934839
PM		 372 } else
373 return on_off("dynamic");
374#endif
375 } else if (matches(*argv, "type") == 0) {
376 NEXT_ARG();
909dfe2c 377 *type = *argv;
1d934839
PM		 378 argc--; argv++;
379 break;
ace9c961
SH		 380 } else if (matches(*argv, "alias") == 0) {
381 NEXT_ARG();
382 addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
383 *argv, strlen(*argv));
384 argc--; argv++;
385 break;
1d934839 386 } else {
909dfe2c 387 if (strcmp(*argv, "dev") == 0) {
1d934839
PM		 388 NEXT_ARG();
389 }
05325552
PM		 390 if (matches(*argv, "help") == 0)
391 usage();
909dfe2c 392 if (*dev)
1d934839 393 duparg2("dev", *argv);
909dfe2c 394 *dev = *argv;
1d934839
PM		 395 }
396 argc--; argv++;
397 }
398
909dfe2c
PE		 399 return ret - argc;
400}
401
402static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
403{
404 int len;
405 char *dev = NULL;
406 char *name = NULL;
407 char *link = NULL;
408 char *type = NULL;
409 struct link_util *lu = NULL;
410 struct iplink_req req;
411 int ret;
412
413 memset(&req, 0, sizeof(req));
414
415 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
416 req.n.nlmsg_flags = NLM_F_REQUEST|flags;
417 req.n.nlmsg_type = cmd;
418 req.i.ifi_family = preferred_family;
419
420 ret = iplink_parse(argc, argv, &req, &name, &type, &link, &dev);
421 if (ret < 0)
422 return ret;
423
424 argc -= ret;
425 argv += ret;
1d934839
PM		 426 ll_init_map(&rth);
427
428 if (type) {
429 struct rtattr *linkinfo = NLMSG_TAIL(&req.n);
430 addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
431 addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
432 strlen(type));
433
434 lu = get_link_kind(type);
435 if (lu && argc) {
436 struct rtattr * data = NLMSG_TAIL(&req.n);
437 addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0);
438
439 if (lu->parse_opt &&
440 lu->parse_opt(lu, argc, argv, &req.n))
441 return -1;
442
443 data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data;
444 } else if (argc) {
445 if (matches(*argv, "help") == 0)
446 usage();
447 fprintf(stderr, "Garbage instead of arguments \"%s ...\". "
448 "Try \"ip link help\".\n", *argv);
449 return -1;
450 }
451 linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
3ef0c859
PM		 452 } else if (flags & NLM_F_CREATE) {
453 fprintf(stderr, "Not enough information: \"type\" argument "
454 "is required\n");
455 return -1;
1d934839
PM		 456 }
457
458 if (!(flags & NLM_F_CREATE)) {
459 if (!dev) {
460 fprintf(stderr, "Not enough information: \"dev\" "
461 "argument is required.\n");
462 exit(-1);
463 }
464
465 req.i.ifi_index = ll_name_to_index(dev);
466 if (req.i.ifi_index == 0) {
467 fprintf(stderr, "Cannot find device \"%s\"\n", dev);
468 return -1;
469 }
470 } else {
471 /* Allow "ip link add dev" and "ip link add name" */
472 if (!name)
473 name = dev;
474
475 if (link) {
476 int ifindex;
477
478 ifindex = ll_name_to_index(link);
479 if (ifindex == 0) {
480 fprintf(stderr, "Cannot find device \"%s\"\n",
481 link);
482 return -1;
483 }
484 addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4);
485 }
486 }
487
488 if (name) {
489 len = strlen(name) + 1;
ca78b0e7
PM		 490 if (len == 1)
491 invarg("\"\" is not a valid device identifier\n", "name");
1d934839 492 if (len > IFNAMSIZ)
ca78b0e7 493 invarg("\"name\" too long\n", name);
1d934839
PM		 494 addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len);
495 }
496
497 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
498 exit(2);
499
500 return 0;
501}
502
503#if IPLINK_IOCTL_COMPAT
aba5acdf
SH		 504static int get_ctl_fd(void)
505{
506 int s_errno;
507 int fd;
508
509 fd = socket(PF_INET, SOCK_DGRAM, 0);
510 if (fd >= 0)
511 return fd;
512 s_errno = errno;
513 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
514 if (fd >= 0)
515 return fd;
516 fd = socket(PF_INET6, SOCK_DGRAM, 0);
517 if (fd >= 0)
518 return fd;
519 errno = s_errno;
520 perror("Cannot create control socket");
521 return -1;
522}
523
71058eb8 524static int do_chflags(const char *dev, __u32 flags, __u32 mask)
aba5acdf
SH		 525{
526 struct ifreq ifr;
527 int fd;
528 int err;
529
71058eb8 530 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
aba5acdf
SH		 531 fd = get_ctl_fd();
532 if (fd < 0)
533 return -1;
534 err = ioctl(fd, SIOCGIFFLAGS, &ifr);
535 if (err) {
536 perror("SIOCGIFFLAGS");
537 close(fd);
538 return -1;
539 }
540 if ((ifr.ifr_flags^flags)&mask) {
541 ifr.ifr_flags &= ~mask;
542 ifr.ifr_flags |= mask&flags;
543 err = ioctl(fd, SIOCSIFFLAGS, &ifr);
544 if (err)
545 perror("SIOCSIFFLAGS");
546 }
547 close(fd);
548 return err;
549}
550
71058eb8 551static int do_changename(const char *dev, const char *newdev)
aba5acdf
SH		 552{
553 struct ifreq ifr;
554 int fd;
555 int err;
556
71058eb8
SH		 557 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
558 strncpy(ifr.ifr_newname, newdev, IFNAMSIZ);
aba5acdf
SH		 559 fd = get_ctl_fd();
560 if (fd < 0)
561 return -1;
562 err = ioctl(fd, SIOCSIFNAME, &ifr);
563 if (err) {
564 perror("SIOCSIFNAME");
565 close(fd);
566 return -1;
567 }
568 close(fd);
569 return err;
570}
571
71058eb8 572static int set_qlen(const char *dev, int qlen)
aba5acdf
SH		 573{
574 struct ifreq ifr;
575 int s;
576
577 s = get_ctl_fd();
578 if (s < 0)
579 return -1;
580
581 memset(&ifr, 0, sizeof(ifr));
ae665a52
SH		 582 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
583 ifr.ifr_qlen = qlen;
aba5acdf
SH		 584 if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
585 perror("SIOCSIFXQLEN");
586 close(s);
587 return -1;
588 }
589 close(s);
590
ae665a52 591 return 0;
aba5acdf
SH		 592}
593
71058eb8 594static int set_mtu(const char *dev, int mtu)
aba5acdf
SH		 595{
596 struct ifreq ifr;
597 int s;
598
599 s = get_ctl_fd();
600 if (s < 0)
601 return -1;
602
603 memset(&ifr, 0, sizeof(ifr));
ae665a52
SH		 604 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
605 ifr.ifr_mtu = mtu;
aba5acdf
SH		 606 if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
607 perror("SIOCSIFMTU");
608 close(s);
609 return -1;
610 }
611 close(s);
612
ae665a52 613 return 0;
aba5acdf
SH		 614}
615
71058eb8 616static int get_address(const char *dev, int *htype)
aba5acdf
SH		 617{
618 struct ifreq ifr;
619 struct sockaddr_ll me;
f332d169 620 socklen_t alen;
aba5acdf
SH		 621 int s;
622
623 s = socket(PF_PACKET, SOCK_DGRAM, 0);
ae665a52 624 if (s < 0) {
aba5acdf
SH		 625 perror("socket(PF_PACKET)");
626 return -1;
627 }
628
629 memset(&ifr, 0, sizeof(ifr));
71058eb8 630 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
aba5acdf
SH		 631 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
632 perror("SIOCGIFINDEX");
633 close(s);
634 return -1;
635 }
636
637 memset(&me, 0, sizeof(me));
638 me.sll_family = AF_PACKET;
639 me.sll_ifindex = ifr.ifr_ifindex;
640 me.sll_protocol = htons(ETH_P_LOOP);
641 if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) {
642 perror("bind");
643 close(s);
644 return -1;
645 }
646
647 alen = sizeof(me);
648 if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) {
649 perror("getsockname");
650 close(s);
651 return -1;
652 }
653 close(s);
654 *htype = me.sll_hatype;
655 return me.sll_halen;
656}
657
ae665a52 658static int parse_address(const char *dev, int hatype, int halen,
7b565754 659 char *lla, struct ifreq *ifr)
aba5acdf
SH		 660{
661 int alen;
662
663 memset(ifr, 0, sizeof(*ifr));
71058eb8 664 strncpy(ifr->ifr_name, dev, IFNAMSIZ);
aba5acdf
SH		 665 ifr->ifr_hwaddr.sa_family = hatype;
666 alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
667 if (alen < 0)
668 return -1;
669 if (alen != halen) {
670 fprintf(stderr, "Wrong address (%s) length: expected %d bytes\n", lla, halen);
671 return -1;
672 }
ae665a52 673 return 0;
aba5acdf
SH		 674}
675
676static int set_address(struct ifreq *ifr, int brd)
677{
678 int s;
679
680 s = get_ctl_fd();
681 if (s < 0)
682 return -1;
683 if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
684 perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
685 close(s);
686 return -1;
687 }
688 close(s);
ae665a52 689 return 0;
aba5acdf
SH		 690}
691
692
693static int do_set(int argc, char **argv)
694{
695 char *dev = NULL;
696 __u32 mask = 0;
697 __u32 flags = 0;
698 int qlen = -1;
699 int mtu = -1;
700 char *newaddr = NULL;
701 char *newbrd = NULL;
702 struct ifreq ifr0, ifr1;
703 char *newname = NULL;
704 int htype, halen;
705
706 while (argc > 0) {
707 if (strcmp(*argv, "up") == 0) {
708 mask |= IFF_UP;
709 flags |= IFF_UP;
710 } else if (strcmp(*argv, "down") == 0) {
711 mask |= IFF_UP;
712 flags &= ~IFF_UP;
713 } else if (strcmp(*argv, "name") == 0) {
714 NEXT_ARG();
715 newname = *argv;
716 } else if (matches(*argv, "address") == 0) {
717 NEXT_ARG();
718 newaddr = *argv;
719 } else if (matches(*argv, "broadcast") == 0 ||
720 strcmp(*argv, "brd") == 0) {
721 NEXT_ARG();
722 newbrd = *argv;
723 } else if (matches(*argv, "txqueuelen") == 0 ||
724 strcmp(*argv, "qlen") == 0 ||
725 matches(*argv, "txqlen") == 0) {
726 NEXT_ARG();
727 if (qlen != -1)
728 duparg("txqueuelen", *argv);
729 if (get_integer(&qlen, *argv, 0))
730 invarg("Invalid \"txqueuelen\" value\n", *argv);
731 } else if (strcmp(*argv, "mtu") == 0) {
732 NEXT_ARG();
733 if (mtu != -1)
734 duparg("mtu", *argv);
735 if (get_integer(&mtu, *argv, 0))
736 invarg("Invalid \"mtu\" value\n", *argv);
737 } else if (strcmp(*argv, "multicast") == 0) {
738 NEXT_ARG();
739 mask |= IFF_MULTICAST;
740 if (strcmp(*argv, "on") == 0) {
741 flags |= IFF_MULTICAST;
742 } else if (strcmp(*argv, "off") == 0) {
743 flags &= ~IFF_MULTICAST;
744 } else
745 return on_off("multicast");
d27b1b5b 746 } else if (strcmp(*argv, "allmulticast") == 0) {
747 NEXT_ARG();
748 mask |= IFF_ALLMULTI;
749 if (strcmp(*argv, "on") == 0) {
750 flags |= IFF_ALLMULTI;
751 } else if (strcmp(*argv, "off") == 0) {
752 flags &= ~IFF_ALLMULTI;
753 } else
754 return on_off("allmulticast");
755 } else if (strcmp(*argv, "promisc") == 0) {
756 NEXT_ARG();
757 mask |= IFF_PROMISC;
758 if (strcmp(*argv, "on") == 0) {
759 flags |= IFF_PROMISC;
760 } else if (strcmp(*argv, "off") == 0) {
761 flags &= ~IFF_PROMISC;
762 } else
763 return on_off("promisc");
764 } else if (strcmp(*argv, "trailers") == 0) {
765 NEXT_ARG();
766 mask |= IFF_NOTRAILERS;
767 if (strcmp(*argv, "off") == 0) {
768 flags |= IFF_NOTRAILERS;
769 } else if (strcmp(*argv, "on") == 0) {
770 flags &= ~IFF_NOTRAILERS;
771 } else
772 return on_off("trailers");
aba5acdf
SH		 773 } else if (strcmp(*argv, "arp") == 0) {
774 NEXT_ARG();
775 mask |= IFF_NOARP;
776 if (strcmp(*argv, "on") == 0) {
777 flags &= ~IFF_NOARP;
778 } else if (strcmp(*argv, "off") == 0) {
779 flags |= IFF_NOARP;
780 } else
781 return on_off("noarp");
782#ifdef IFF_DYNAMIC
783 } else if (matches(*argv, "dynamic") == 0) {
784 NEXT_ARG();
785 mask |= IFF_DYNAMIC;
786 if (strcmp(*argv, "on") == 0) {
787 flags |= IFF_DYNAMIC;
788 } else if (strcmp(*argv, "off") == 0) {
789 flags &= ~IFF_DYNAMIC;
790 } else
791 return on_off("dynamic");
792#endif
793 } else {
794 if (strcmp(*argv, "dev") == 0) {
795 NEXT_ARG();
796 }
797 if (matches(*argv, "help") == 0)
798 usage();
799 if (dev)
800 duparg2("dev", *argv);
801 dev = *argv;
802 }
803 argc--; argv++;
804 }
805
806 if (!dev) {
807 fprintf(stderr, "Not enough of information: \"dev\" argument is required.\n");
808 exit(-1);
809 }
810
811 if (newaddr || newbrd) {
812 halen = get_address(dev, &htype);
813 if (halen < 0)
814 return -1;
815 if (newaddr) {
816 if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0)
817 return -1;
818 }
819 if (newbrd) {
820 if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0)
ae665a52 821 return -1;
aba5acdf
SH		 822 }
823 }
824
825 if (newname && strcmp(dev, newname)) {
ca78b0e7
PM		 826 if (strlen(newname) == 0)
827 invarg("\"\" is not a valid device identifier\n", "name");
aba5acdf
SH		 828 if (do_changename(dev, newname) < 0)
829 return -1;
830 dev = newname;
831 }
ae665a52 832 if (qlen != -1) {
aba5acdf 833 if (set_qlen(dev, qlen) < 0)
ae665a52 834 return -1;
aba5acdf 835 }
ae665a52 836 if (mtu != -1) {
aba5acdf 837 if (set_mtu(dev, mtu) < 0)
ae665a52 838 return -1;
aba5acdf
SH		 839 }
840 if (newaddr || newbrd) {
841 if (newbrd) {
842 if (set_address(&ifr1, 1) < 0)
ae665a52 843 return -1;
aba5acdf
SH		 844 }
845 if (newaddr) {
846 if (set_address(&ifr0, 0) < 0)
847 return -1;
848 }
849 }
850 if (mask)
851 return do_chflags(dev, flags, mask);
852 return 0;
853}
1d934839 854#endif /* IPLINK_IOCTL_COMPAT */
aba5acdf
SH		 855
856int do_iplink(int argc, char **argv)
857{
858 if (argc > 0) {
1d934839
PM		 859 if (iplink_have_newlink()) {
860 if (matches(*argv, "add") == 0)
861 return iplink_modify(RTM_NEWLINK,
862 NLM_F_CREATE|NLM_F_EXCL,
863 argc-1, argv+1);
864 if (matches(*argv, "set") == 0 ||
865 matches(*argv, "change") == 0)
866 return iplink_modify(RTM_NEWLINK, 0,
867 argc-1, argv+1);
868 if (matches(*argv, "replace") == 0)
869 return iplink_modify(RTM_NEWLINK,
870 NLM_F_CREATE|NLM_F_REPLACE,
871 argc-1, argv+1);
872 if (matches(*argv, "delete") == 0)
873 return iplink_modify(RTM_DELLINK, 0,
874 argc-1, argv+1);
875 } else {
876#if IPLINK_IOCTL_COMPAT
877 if (matches(*argv, "set") == 0)
878 return do_set(argc-1, argv+1);
879#endif
880 }
aba5acdf
SH		 881 if (matches(*argv, "show") == 0 ||
882 matches(*argv, "lst") == 0 ||
883 matches(*argv, "list") == 0)
884 return ipaddr_list_link(argc-1, argv+1);
885 if (matches(*argv, "help") == 0)
886 usage();
887 } else
888 return ipaddr_list_link(0, NULL);
889
890 fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n", *argv);
891 exit(-1);
892}
Upstream mirror of iproute2