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Merge branch 'master' into net-next
[mirror_iproute2.git] / ip / iplink.c
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 #include <stdbool.h>
31 #include <linux/mpls.h>
32
33 #include "rt_names.h"
34 #include "utils.h"
35 #include "ip_common.h"
36 #include "xdp.h"
37 #include "namespace.h"
38
39 #define IPLINK_IOCTL_COMPAT 1
40 #ifndef LIBDIR
41 #define LIBDIR "/usr/lib"
42 #endif
43
44 static void usage(void) __attribute__((noreturn));
45 static int iplink_have_newlink(void);
46
47 void iplink_usage(void)
48 {
49 if (iplink_have_newlink()) {
50 fprintf(stderr,
51 "Usage: ip link add [link DEV] [ name ] NAME\n"
52 " [ txqueuelen PACKETS ]\n"
53 " [ address LLADDR ]\n"
54 " [ broadcast LLADDR ]\n"
55 " [ mtu MTU ] [index IDX ]\n"
56 " [ numtxqueues QUEUE_COUNT ]\n"
57 " [ numrxqueues QUEUE_COUNT ]\n"
58 " type TYPE [ ARGS ]\n"
59 "\n"
60 " ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n"
61 "\n"
62 " ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n"
63 " [ { up | down } ]\n"
64 " [ type TYPE ARGS ]\n");
65 } else
66 fprintf(stderr,
67 "Usage: ip link set DEVICE [ { up | down } ]\n");
68
69 fprintf(stderr,
70 " [ arp { on | off } ]\n"
71 " [ dynamic { on | off } ]\n"
72 " [ multicast { on | off } ]\n"
73 " [ allmulticast { on | off } ]\n"
74 " [ promisc { on | off } ]\n"
75 " [ trailers { on | off } ]\n"
76 " [ carrier { on | off } ]\n"
77 " [ txqueuelen PACKETS ]\n"
78 " [ name NEWNAME ]\n"
79 " [ address LLADDR ]\n"
80 " [ broadcast LLADDR ]\n"
81 " [ mtu MTU ]\n"
82 " [ netns { PID | NAME } ]\n"
83 " [ link-netnsid ID ]\n"
84 " [ alias NAME ]\n"
85 " [ vf NUM [ mac LLADDR ]\n"
86 " [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-PROTO ] ]\n"
87 " [ rate TXRATE ]\n"
88 " [ max_tx_rate TXRATE ]\n"
89 " [ min_tx_rate TXRATE ]\n"
90 " [ spoofchk { on | off} ]\n"
91 " [ query_rss { on | off} ]\n"
92 " [ state { auto | enable | disable} ] ]\n"
93 " [ trust { on | off} ] ]\n"
94 " [ node_guid { eui64 } ]\n"
95 " [ port_guid { eui64 } ]\n"
96 " [ xdp { off |\n"
97 " object FILE [ section NAME ] [ verbose ] |\n"
98 " pinned FILE } ]\n"
99 " [ master DEVICE ][ vrf NAME ]\n"
100 " [ nomaster ]\n"
101 " [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
102 " [ protodown { on | off } ]\n"
103 "\n"
104 " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n");
105
106 fprintf(stderr, "\n ip link xstats type TYPE [ ARGS ]\n");
107 fprintf(stderr, "\n ip link afstats [ dev DEVICE ]\n");
108
109 if (iplink_have_newlink()) {
110 fprintf(stderr,
111 "\n"
112 " ip link help [ TYPE ]\n"
113 "\n"
114 "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | macvtap |\n"
115 " bridge | bond | team | ipoib | ip6tnl | ipip | sit | vxlan |\n"
116 " gre | gretap | ip6gre | ip6gretap | vti | nlmon | team_slave |\n"
117 " bond_slave | ipvlan | geneve | bridge_slave | vrf | macsec }\n");
118 }
119 exit(-1);
120 }
121
122 static void usage(void)
123 {
124 iplink_usage();
125 }
126
127 static int on_off(const char *msg, const char *realval)
128 {
129 fprintf(stderr,
130 "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
131 msg, realval);
132 return -1;
133 }
134
135 static void *BODY; /* cached dlopen(NULL) handle */
136 static struct link_util *linkutil_list;
137
138 struct link_util *get_link_kind(const char *id)
139 {
140 void *dlh;
141 char buf[256];
142 struct link_util *l;
143
144 for (l = linkutil_list; l; l = l->next)
145 if (strcmp(l->id, id) == 0)
146 return l;
147
148 snprintf(buf, sizeof(buf), LIBDIR "/ip/link_%s.so", id);
149 dlh = dlopen(buf, RTLD_LAZY);
150 if (dlh == NULL) {
151 /* look in current binary, only open once */
152 dlh = BODY;
153 if (dlh == NULL) {
154 dlh = BODY = dlopen(NULL, RTLD_LAZY);
155 if (dlh == NULL)
156 return NULL;
157 }
158 }
159
160 snprintf(buf, sizeof(buf), "%s_link_util", id);
161 l = dlsym(dlh, buf);
162 if (l == NULL)
163 return NULL;
164
165 l->next = linkutil_list;
166 linkutil_list = l;
167 return l;
168 }
169
170 static int get_link_mode(const char *mode)
171 {
172 if (strcasecmp(mode, "default") == 0)
173 return IF_LINK_MODE_DEFAULT;
174 if (strcasecmp(mode, "dormant") == 0)
175 return IF_LINK_MODE_DORMANT;
176 return -1;
177 }
178
179 static int get_addr_gen_mode(const char *mode)
180 {
181 if (strcasecmp(mode, "eui64") == 0)
182 return IN6_ADDR_GEN_MODE_EUI64;
183 if (strcasecmp(mode, "none") == 0)
184 return IN6_ADDR_GEN_MODE_NONE;
185 if (strcasecmp(mode, "stable_secret") == 0)
186 return IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
187 if (strcasecmp(mode, "random") == 0)
188 return IN6_ADDR_GEN_MODE_RANDOM;
189 return -1;
190 }
191
192 #if IPLINK_IOCTL_COMPAT
193 static int have_rtnl_newlink = -1;
194
195 static int accept_msg(const struct sockaddr_nl *who,
196 struct rtnl_ctrl_data *ctrl,
197 struct nlmsghdr *n, void *arg)
198 {
199 struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n);
200
201 if (n->nlmsg_type == NLMSG_ERROR &&
202 (err->error == -EOPNOTSUPP || err->error == -EINVAL))
203 have_rtnl_newlink = 0;
204 else
205 have_rtnl_newlink = 1;
206 return -1;
207 }
208
209 static int iplink_have_newlink(void)
210 {
211 struct {
212 struct nlmsghdr n;
213 struct ifinfomsg i;
214 char buf[1024];
215 } req = {
216 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
217 .n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
218 .n.nlmsg_type = RTM_NEWLINK,
219 .i.ifi_family = AF_UNSPEC,
220 };
221
222 if (have_rtnl_newlink < 0) {
223 if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) {
224 perror("request send failed");
225 exit(1);
226 }
227 rtnl_listen(&rth, accept_msg, NULL);
228 }
229 return have_rtnl_newlink;
230 }
231 #else /* IPLINK_IOCTL_COMPAT */
232 static int iplink_have_newlink(void)
233 {
234 return 1;
235 }
236 #endif /* ! IPLINK_IOCTL_COMPAT */
237
238 static int nl_get_ll_addr_len(unsigned int dev_index)
239 {
240 int len;
241 struct iplink_req req = {
242 .n = {
243 .nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
244 .nlmsg_type = RTM_GETLINK,
245 .nlmsg_flags = NLM_F_REQUEST
246 },
247 .i = {
248 .ifi_family = preferred_family,
249 .ifi_index = dev_index,
250 }
251 };
252 struct rtattr *tb[IFLA_MAX+1];
253
254 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
255 return -1;
256
257 len = req.n.nlmsg_len - NLMSG_LENGTH(sizeof(req.i));
258 if (len < 0)
259 return -1;
260
261 parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(&req.i), len, NLA_F_NESTED);
262 if (!tb[IFLA_ADDRESS])
263 return -1;
264
265 return RTA_PAYLOAD(tb[IFLA_ADDRESS]);
266 }
267
268 static void iplink_parse_vf_vlan_info(int vf, int *argcp, char ***argvp,
269 struct ifla_vf_vlan_info *ivvip)
270 {
271 int argc = *argcp;
272 char **argv = *argvp;
273
274 NEXT_ARG();
275 if (get_unsigned(&ivvip->vlan, *argv, 0))
276 invarg("Invalid \"vlan\" value\n", *argv);
277
278 ivvip->vf = vf;
279 ivvip->qos = 0;
280 ivvip->vlan_proto = htons(ETH_P_8021Q);
281 if (NEXT_ARG_OK()) {
282 NEXT_ARG();
283 if (matches(*argv, "qos") == 0) {
284 NEXT_ARG();
285 if (get_unsigned(&ivvip->qos, *argv, 0))
286 invarg("Invalid \"qos\" value\n", *argv);
287 } else {
288 /* rewind arg */
289 PREV_ARG();
290 }
291 }
292 if (NEXT_ARG_OK()) {
293 NEXT_ARG();
294 if (matches(*argv, "proto") == 0) {
295 NEXT_ARG();
296 if (ll_proto_a2n(&ivvip->vlan_proto, *argv))
297 invarg("protocol is invalid\n", *argv);
298 if (ivvip->vlan_proto != htons(ETH_P_8021AD) &&
299 ivvip->vlan_proto != htons(ETH_P_8021Q)) {
300 SPRINT_BUF(b1);
301 SPRINT_BUF(b2);
302 char msg[64 + sizeof(b1) + sizeof(b2)];
303
304 sprintf(msg,
305 "Invalid \"vlan protocol\" value - supported %s, %s\n",
306 ll_proto_n2a(htons(ETH_P_8021Q),
307 b1, sizeof(b1)),
308 ll_proto_n2a(htons(ETH_P_8021AD),
309 b2, sizeof(b2)));
310 invarg(msg, *argv);
311 }
312 } else {
313 /* rewind arg */
314 PREV_ARG();
315 }
316 }
317
318 *argcp = argc;
319 *argvp = argv;
320 }
321
322 static int iplink_parse_vf(int vf, int *argcp, char ***argvp,
323 struct iplink_req *req, int dev_index)
324 {
325 char new_rate_api = 0, count = 0, override_legacy_rate = 0;
326 struct ifla_vf_rate tivt;
327 int len, argc = *argcp;
328 char **argv = *argvp;
329 struct rtattr *vfinfo;
330
331 tivt.min_tx_rate = -1;
332 tivt.max_tx_rate = -1;
333
334 vfinfo = addattr_nest(&req->n, sizeof(*req), IFLA_VF_INFO);
335
336 while (NEXT_ARG_OK()) {
337 NEXT_ARG();
338 count++;
339 if (!matches(*argv, "max_tx_rate")) {
340 /* new API in use */
341 new_rate_api = 1;
342 /* override legacy rate */
343 override_legacy_rate = 1;
344 } else if (!matches(*argv, "min_tx_rate")) {
345 /* new API in use */
346 new_rate_api = 1;
347 }
348 }
349
350 while (count--) {
351 /* rewind arg */
352 PREV_ARG();
353 }
354
355 while (NEXT_ARG_OK()) {
356 NEXT_ARG();
357 if (matches(*argv, "mac") == 0) {
358 struct ifla_vf_mac ivm = { 0 };
359 int halen = nl_get_ll_addr_len(dev_index);
360
361 NEXT_ARG();
362 ivm.vf = vf;
363 len = ll_addr_a2n((char *)ivm.mac, 32, *argv);
364 if (len < 0)
365 return -1;
366 if (halen > 0 && len != halen) {
367 fprintf(stderr,
368 "Invalid address length %d - must be %d bytes\n",
369 len, halen);
370 return -1;
371 }
372 addattr_l(&req->n, sizeof(*req), IFLA_VF_MAC,
373 &ivm, sizeof(ivm));
374 } else if (matches(*argv, "vlan") == 0) {
375 struct ifla_vf_vlan_info ivvi;
376
377 iplink_parse_vf_vlan_info(vf, &argc, &argv, &ivvi);
378 /* support the old interface in case of older kernel*/
379 if (ivvi.vlan_proto == htons(ETH_P_8021Q)) {
380 struct ifla_vf_vlan ivv;
381
382 ivv.vf = ivvi.vf;
383 ivv.vlan = ivvi.vlan;
384 ivv.qos = ivvi.qos;
385 addattr_l(&req->n, sizeof(*req),
386 IFLA_VF_VLAN, &ivv, sizeof(ivv));
387 } else {
388 struct rtattr *vfvlanlist;
389
390 vfvlanlist = addattr_nest(&req->n, sizeof(*req),
391 IFLA_VF_VLAN_LIST);
392 addattr_l(&req->n, sizeof(*req),
393 IFLA_VF_VLAN_INFO, &ivvi,
394 sizeof(ivvi));
395
396 while (NEXT_ARG_OK()) {
397 NEXT_ARG();
398 if (matches(*argv, "vlan") != 0) {
399 PREV_ARG();
400 break;
401 }
402 iplink_parse_vf_vlan_info(vf, &argc,
403 &argv, &ivvi);
404 addattr_l(&req->n, sizeof(*req),
405 IFLA_VF_VLAN_INFO, &ivvi,
406 sizeof(ivvi));
407 }
408 addattr_nest_end(&req->n, vfvlanlist);
409 }
410 } else if (matches(*argv, "rate") == 0) {
411 struct ifla_vf_tx_rate ivt;
412
413 NEXT_ARG();
414 if (get_unsigned(&ivt.rate, *argv, 0))
415 invarg("Invalid \"rate\" value\n", *argv);
416
417 ivt.vf = vf;
418 if (!new_rate_api)
419 addattr_l(&req->n, sizeof(*req),
420 IFLA_VF_TX_RATE, &ivt, sizeof(ivt));
421 else if (!override_legacy_rate)
422 tivt.max_tx_rate = ivt.rate;
423
424 } else if (matches(*argv, "max_tx_rate") == 0) {
425 NEXT_ARG();
426 if (get_unsigned(&tivt.max_tx_rate, *argv, 0))
427 invarg("Invalid \"max tx rate\" value\n",
428 *argv);
429 tivt.vf = vf;
430
431 } else if (matches(*argv, "min_tx_rate") == 0) {
432 NEXT_ARG();
433 if (get_unsigned(&tivt.min_tx_rate, *argv, 0))
434 invarg("Invalid \"min tx rate\" value\n",
435 *argv);
436 tivt.vf = vf;
437
438 } else if (matches(*argv, "spoofchk") == 0) {
439 struct ifla_vf_spoofchk ivs;
440
441 NEXT_ARG();
442 if (matches(*argv, "on") == 0)
443 ivs.setting = 1;
444 else if (matches(*argv, "off") == 0)
445 ivs.setting = 0;
446 else
447 return on_off("spoofchk", *argv);
448 ivs.vf = vf;
449 addattr_l(&req->n, sizeof(*req), IFLA_VF_SPOOFCHK,
450 &ivs, sizeof(ivs));
451
452 } else if (matches(*argv, "query_rss") == 0) {
453 struct ifla_vf_rss_query_en ivs;
454
455 NEXT_ARG();
456 if (matches(*argv, "on") == 0)
457 ivs.setting = 1;
458 else if (matches(*argv, "off") == 0)
459 ivs.setting = 0;
460 else
461 return on_off("query_rss", *argv);
462 ivs.vf = vf;
463 addattr_l(&req->n, sizeof(*req), IFLA_VF_RSS_QUERY_EN,
464 &ivs, sizeof(ivs));
465
466 } else if (matches(*argv, "trust") == 0) {
467 struct ifla_vf_trust ivt;
468
469 NEXT_ARG();
470 if (matches(*argv, "on") == 0)
471 ivt.setting = 1;
472 else if (matches(*argv, "off") == 0)
473 ivt.setting = 0;
474 else
475 invarg("Invalid \"trust\" value\n", *argv);
476 ivt.vf = vf;
477 addattr_l(&req->n, sizeof(*req), IFLA_VF_TRUST,
478 &ivt, sizeof(ivt));
479
480 } else if (matches(*argv, "state") == 0) {
481 struct ifla_vf_link_state ivl;
482
483 NEXT_ARG();
484 if (matches(*argv, "auto") == 0)
485 ivl.link_state = IFLA_VF_LINK_STATE_AUTO;
486 else if (matches(*argv, "enable") == 0)
487 ivl.link_state = IFLA_VF_LINK_STATE_ENABLE;
488 else if (matches(*argv, "disable") == 0)
489 ivl.link_state = IFLA_VF_LINK_STATE_DISABLE;
490 else
491 invarg("Invalid \"state\" value\n", *argv);
492 ivl.vf = vf;
493 addattr_l(&req->n, sizeof(*req), IFLA_VF_LINK_STATE,
494 &ivl, sizeof(ivl));
495 } else if (matches(*argv, "node_guid") == 0) {
496 struct ifla_vf_guid ivg;
497
498 NEXT_ARG();
499 ivg.vf = vf;
500 if (get_guid(&ivg.guid, *argv)) {
501 invarg("Invalid GUID format\n", *argv);
502 return -1;
503 }
504 addattr_l(&req->n, sizeof(*req), IFLA_VF_IB_NODE_GUID,
505 &ivg, sizeof(ivg));
506 } else if (matches(*argv, "port_guid") == 0) {
507 struct ifla_vf_guid ivg;
508
509 NEXT_ARG();
510 ivg.vf = vf;
511 if (get_guid(&ivg.guid, *argv)) {
512 invarg("Invalid GUID format\n", *argv);
513 return -1;
514 }
515 addattr_l(&req->n, sizeof(*req), IFLA_VF_IB_PORT_GUID,
516 &ivg, sizeof(ivg));
517 } else {
518 /* rewind arg */
519 PREV_ARG();
520 break;
521 }
522 }
523
524 if (new_rate_api) {
525 int tmin, tmax;
526
527 if (tivt.min_tx_rate == -1 || tivt.max_tx_rate == -1) {
528 ipaddr_get_vf_rate(tivt.vf, &tmin, &tmax, dev_index);
529 if (tivt.min_tx_rate == -1)
530 tivt.min_tx_rate = tmin;
531 if (tivt.max_tx_rate == -1)
532 tivt.max_tx_rate = tmax;
533 }
534 addattr_l(&req->n, sizeof(*req), IFLA_VF_RATE, &tivt,
535 sizeof(tivt));
536 }
537
538 if (argc == *argcp)
539 incomplete_command();
540
541 addattr_nest_end(&req->n, vfinfo);
542
543 *argcp = argc;
544 *argvp = argv;
545 return 0;
546 }
547
548 int iplink_parse(int argc, char **argv, struct iplink_req *req,
549 char **name, char **type, char **link, char **dev,
550 int *group, int *index)
551 {
552 int ret, len;
553 char abuf[32];
554 int qlen = -1;
555 int mtu = -1;
556 int netns = -1;
557 int vf = -1;
558 int numtxqueues = -1;
559 int numrxqueues = -1;
560 int dev_index = 0;
561 int link_netnsid = -1;
562 int addr_len = 0;
563
564 *group = -1;
565 ret = argc;
566
567 while (argc > 0) {
568 if (strcmp(*argv, "up") == 0) {
569 req->i.ifi_change |= IFF_UP;
570 req->i.ifi_flags |= IFF_UP;
571 } else if (strcmp(*argv, "down") == 0) {
572 req->i.ifi_change |= IFF_UP;
573 req->i.ifi_flags &= ~IFF_UP;
574 } else if (strcmp(*argv, "name") == 0) {
575 NEXT_ARG();
576 *name = *argv;
577 } else if (strcmp(*argv, "index") == 0) {
578 NEXT_ARG();
579 *index = atoi(*argv);
580 if (*index < 0)
581 invarg("Invalid \"index\" value", *argv);
582 } else if (matches(*argv, "link") == 0) {
583 NEXT_ARG();
584 *link = *argv;
585 } else if (matches(*argv, "address") == 0) {
586 NEXT_ARG();
587 addr_len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
588 if (addr_len < 0)
589 return -1;
590 addattr_l(&req->n, sizeof(*req),
591 IFLA_ADDRESS, abuf, addr_len);
592 } else if (matches(*argv, "broadcast") == 0 ||
593 strcmp(*argv, "brd") == 0) {
594 NEXT_ARG();
595 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
596 if (len < 0)
597 return -1;
598 addattr_l(&req->n, sizeof(*req),
599 IFLA_BROADCAST, abuf, len);
600 } else if (matches(*argv, "txqueuelen") == 0 ||
601 strcmp(*argv, "qlen") == 0 ||
602 matches(*argv, "txqlen") == 0) {
603 NEXT_ARG();
604 if (qlen != -1)
605 duparg("txqueuelen", *argv);
606 if (get_integer(&qlen, *argv, 0))
607 invarg("Invalid \"txqueuelen\" value\n", *argv);
608 addattr_l(&req->n, sizeof(*req),
609 IFLA_TXQLEN, &qlen, 4);
610 } else if (strcmp(*argv, "mtu") == 0) {
611 NEXT_ARG();
612 if (mtu != -1)
613 duparg("mtu", *argv);
614 if (get_integer(&mtu, *argv, 0))
615 invarg("Invalid \"mtu\" value\n", *argv);
616 addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4);
617 } else if (strcmp(*argv, "xdpgeneric") == 0 ||
618 strcmp(*argv, "xdpdrv") == 0 ||
619 strcmp(*argv, "xdpoffload") == 0 ||
620 strcmp(*argv, "xdp") == 0) {
621 bool generic = strcmp(*argv, "xdpgeneric") == 0;
622 bool drv = strcmp(*argv, "xdpdrv") == 0;
623 bool offload = strcmp(*argv, "xdpoffload") == 0;
624
625 NEXT_ARG();
626 if (xdp_parse(&argc, &argv, req, generic, drv,
627 offload))
628 exit(-1);
629 } else if (strcmp(*argv, "netns") == 0) {
630 NEXT_ARG();
631 if (netns != -1)
632 duparg("netns", *argv);
633 netns = netns_get_fd(*argv);
634 if (netns >= 0)
635 addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_FD,
636 &netns, 4);
637 else if (get_integer(&netns, *argv, 0) == 0)
638 addattr_l(&req->n, sizeof(*req),
639 IFLA_NET_NS_PID, &netns, 4);
640 else
641 invarg("Invalid \"netns\" value\n", *argv);
642 } else if (strcmp(*argv, "multicast") == 0) {
643 NEXT_ARG();
644 req->i.ifi_change |= IFF_MULTICAST;
645
646 if (strcmp(*argv, "on") == 0)
647 req->i.ifi_flags |= IFF_MULTICAST;
648 else if (strcmp(*argv, "off") == 0)
649 req->i.ifi_flags &= ~IFF_MULTICAST;
650 else
651 return on_off("multicast", *argv);
652 } else if (strcmp(*argv, "allmulticast") == 0) {
653 NEXT_ARG();
654 req->i.ifi_change |= IFF_ALLMULTI;
655
656 if (strcmp(*argv, "on") == 0)
657 req->i.ifi_flags |= IFF_ALLMULTI;
658 else if (strcmp(*argv, "off") == 0)
659 req->i.ifi_flags &= ~IFF_ALLMULTI;
660 else
661 return on_off("allmulticast", *argv);
662 } else if (strcmp(*argv, "promisc") == 0) {
663 NEXT_ARG();
664 req->i.ifi_change |= IFF_PROMISC;
665
666 if (strcmp(*argv, "on") == 0)
667 req->i.ifi_flags |= IFF_PROMISC;
668 else if (strcmp(*argv, "off") == 0)
669 req->i.ifi_flags &= ~IFF_PROMISC;
670 else
671 return on_off("promisc", *argv);
672 } else if (strcmp(*argv, "trailers") == 0) {
673 NEXT_ARG();
674 req->i.ifi_change |= IFF_NOTRAILERS;
675
676 if (strcmp(*argv, "off") == 0)
677 req->i.ifi_flags |= IFF_NOTRAILERS;
678 else if (strcmp(*argv, "on") == 0)
679 req->i.ifi_flags &= ~IFF_NOTRAILERS;
680 else
681 return on_off("trailers", *argv);
682 } else if (strcmp(*argv, "arp") == 0) {
683 NEXT_ARG();
684 req->i.ifi_change |= IFF_NOARP;
685
686 if (strcmp(*argv, "on") == 0)
687 req->i.ifi_flags &= ~IFF_NOARP;
688 else if (strcmp(*argv, "off") == 0)
689 req->i.ifi_flags |= IFF_NOARP;
690 else
691 return on_off("arp", *argv);
692 } else if (strcmp(*argv, "carrier") == 0) {
693 int carrier;
694
695 NEXT_ARG();
696 if (strcmp(*argv, "on") == 0)
697 carrier = 1;
698 else if (strcmp(*argv, "off") == 0)
699 carrier = 0;
700 else
701 return on_off("carrier", *argv);
702
703 addattr8(&req->n, sizeof(*req), IFLA_CARRIER, carrier);
704 } else if (strcmp(*argv, "vf") == 0) {
705 struct rtattr *vflist;
706
707 NEXT_ARG();
708 if (get_integer(&vf, *argv, 0))
709 invarg("Invalid \"vf\" value\n", *argv);
710
711 vflist = addattr_nest(&req->n, sizeof(*req),
712 IFLA_VFINFO_LIST);
713 if (dev_index == 0)
714 missarg("dev");
715
716 len = iplink_parse_vf(vf, &argc, &argv, req, dev_index);
717 if (len < 0)
718 return -1;
719 addattr_nest_end(&req->n, vflist);
720 } else if (matches(*argv, "master") == 0) {
721 int ifindex;
722
723 NEXT_ARG();
724 ifindex = ll_name_to_index(*argv);
725 if (!ifindex)
726 invarg("Device does not exist\n", *argv);
727 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
728 &ifindex, 4);
729 } else if (strcmp(*argv, "vrf") == 0) {
730 int ifindex;
731
732 NEXT_ARG();
733 ifindex = ll_name_to_index(*argv);
734 if (!ifindex)
735 invarg("Not a valid VRF name\n", *argv);
736 if (!name_is_vrf(*argv))
737 invarg("Not a valid VRF name\n", *argv);
738 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
739 &ifindex, sizeof(ifindex));
740 } else if (matches(*argv, "nomaster") == 0) {
741 int ifindex = 0;
742
743 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
744 &ifindex, 4);
745 } else if (matches(*argv, "dynamic") == 0) {
746 NEXT_ARG();
747 req->i.ifi_change |= IFF_DYNAMIC;
748
749 if (strcmp(*argv, "on") == 0)
750 req->i.ifi_flags |= IFF_DYNAMIC;
751 else if (strcmp(*argv, "off") == 0)
752 req->i.ifi_flags &= ~IFF_DYNAMIC;
753 else
754 return on_off("dynamic", *argv);
755 } else if (matches(*argv, "type") == 0) {
756 NEXT_ARG();
757 *type = *argv;
758 argc--; argv++;
759 break;
760 } else if (matches(*argv, "alias") == 0) {
761 NEXT_ARG();
762 addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
763 *argv, strlen(*argv));
764 argc--; argv++;
765 break;
766 } else if (strcmp(*argv, "group") == 0) {
767 NEXT_ARG();
768 if (*group != -1)
769 duparg("group", *argv);
770 if (rtnl_group_a2n(group, *argv))
771 invarg("Invalid \"group\" value\n", *argv);
772 } else if (strcmp(*argv, "mode") == 0) {
773 int mode;
774
775 NEXT_ARG();
776 mode = get_link_mode(*argv);
777 if (mode < 0)
778 invarg("Invalid link mode\n", *argv);
779 addattr8(&req->n, sizeof(*req), IFLA_LINKMODE, mode);
780 } else if (strcmp(*argv, "state") == 0) {
781 int state;
782
783 NEXT_ARG();
784 state = get_operstate(*argv);
785 if (state < 0)
786 invarg("Invalid operstate\n", *argv);
787
788 addattr8(&req->n, sizeof(*req), IFLA_OPERSTATE, state);
789 } else if (matches(*argv, "numtxqueues") == 0) {
790 NEXT_ARG();
791 if (numtxqueues != -1)
792 duparg("numtxqueues", *argv);
793 if (get_integer(&numtxqueues, *argv, 0))
794 invarg("Invalid \"numtxqueues\" value\n",
795 *argv);
796 addattr_l(&req->n, sizeof(*req), IFLA_NUM_TX_QUEUES,
797 &numtxqueues, 4);
798 } else if (matches(*argv, "numrxqueues") == 0) {
799 NEXT_ARG();
800 if (numrxqueues != -1)
801 duparg("numrxqueues", *argv);
802 if (get_integer(&numrxqueues, *argv, 0))
803 invarg("Invalid \"numrxqueues\" value\n",
804 *argv);
805 addattr_l(&req->n, sizeof(*req), IFLA_NUM_RX_QUEUES,
806 &numrxqueues, 4);
807 } else if (matches(*argv, "addrgenmode") == 0) {
808 struct rtattr *afs, *afs6;
809 int mode;
810
811 NEXT_ARG();
812 mode = get_addr_gen_mode(*argv);
813 if (mode < 0)
814 invarg("Invalid address generation mode\n",
815 *argv);
816 afs = addattr_nest(&req->n, sizeof(*req), IFLA_AF_SPEC);
817 afs6 = addattr_nest(&req->n, sizeof(*req), AF_INET6);
818 addattr8(&req->n, sizeof(*req),
819 IFLA_INET6_ADDR_GEN_MODE, mode);
820 addattr_nest_end(&req->n, afs6);
821 addattr_nest_end(&req->n, afs);
822 } else if (matches(*argv, "link-netnsid") == 0) {
823 NEXT_ARG();
824 if (link_netnsid != -1)
825 duparg("link-netnsid", *argv);
826 if (get_integer(&link_netnsid, *argv, 0))
827 invarg("Invalid \"link-netnsid\" value\n",
828 *argv);
829 addattr32(&req->n, sizeof(*req), IFLA_LINK_NETNSID,
830 link_netnsid);
831 } else if (strcmp(*argv, "protodown") == 0) {
832 unsigned int proto_down;
833
834 NEXT_ARG();
835 if (strcmp(*argv, "on") == 0)
836 proto_down = 1;
837 else if (strcmp(*argv, "off") == 0)
838 proto_down = 0;
839 else
840 return on_off("protodown", *argv);
841 addattr8(&req->n, sizeof(*req), IFLA_PROTO_DOWN,
842 proto_down);
843 } else {
844 if (matches(*argv, "help") == 0)
845 usage();
846
847 if (strcmp(*argv, "dev") == 0)
848 NEXT_ARG();
849 if (*dev)
850 duparg2("dev", *argv);
851 *dev = *argv;
852 dev_index = ll_name_to_index(*dev);
853 }
854 argc--; argv++;
855 }
856
857 if (dev_index && addr_len) {
858 int halen = nl_get_ll_addr_len(dev_index);
859
860 if (halen >= 0 && halen != addr_len) {
861 fprintf(stderr,
862 "Invalid address length %d - must be %d bytes\n",
863 addr_len, halen);
864 return -1;
865 }
866 }
867
868 return ret - argc;
869 }
870
871 static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
872 {
873 int len;
874 char *dev = NULL;
875 char *name = NULL;
876 char *link = NULL;
877 char *type = NULL;
878 int index = -1;
879 int group;
880 struct link_util *lu = NULL;
881 struct iplink_req req = {
882 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
883 .n.nlmsg_flags = NLM_F_REQUEST | flags,
884 .n.nlmsg_type = cmd,
885 .i.ifi_family = preferred_family,
886 };
887 int ret;
888
889 ret = iplink_parse(argc, argv,
890 &req, &name, &type, &link, &dev, &group, &index);
891 if (ret < 0)
892 return ret;
893
894 argc -= ret;
895 argv += ret;
896
897 if (group != -1) {
898 if (dev)
899 addattr_l(&req.n, sizeof(req), IFLA_GROUP,
900 &group, sizeof(group));
901 else {
902 if (argc) {
903 fprintf(stderr,
904 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
905 *argv);
906 return -1;
907 }
908 if (flags & NLM_F_CREATE) {
909 fprintf(stderr,
910 "group cannot be used when creating devices.\n");
911 return -1;
912 }
913
914 req.i.ifi_index = 0;
915 addattr32(&req.n, sizeof(req), IFLA_GROUP, group);
916 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
917 return -2;
918 return 0;
919 }
920 }
921
922 if (!(flags & NLM_F_CREATE)) {
923 if (!dev) {
924 fprintf(stderr,
925 "Not enough information: \"dev\" argument is required.\n");
926 exit(-1);
927 }
928 if (cmd == RTM_NEWLINK && index != -1) {
929 fprintf(stderr,
930 "index can be used only when creating devices.\n");
931 exit(-1);
932 }
933
934 req.i.ifi_index = ll_name_to_index(dev);
935 if (req.i.ifi_index == 0) {
936 fprintf(stderr, "Cannot find device \"%s\"\n", dev);
937 return -1;
938 }
939 } else {
940 /* Allow "ip link add dev" and "ip link add name" */
941 if (!name)
942 name = dev;
943
944 if (link) {
945 int ifindex;
946
947 ifindex = ll_name_to_index(link);
948 if (ifindex == 0) {
949 fprintf(stderr, "Cannot find device \"%s\"\n",
950 link);
951 return -1;
952 }
953 addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4);
954 }
955
956 if (index == -1)
957 req.i.ifi_index = 0;
958 else
959 req.i.ifi_index = index;
960 }
961
962 if (name) {
963 len = strlen(name) + 1;
964 if (len == 1)
965 invarg("\"\" is not a valid device identifier\n",
966 "name");
967 if (len > IFNAMSIZ)
968 invarg("\"name\" too long\n", name);
969 addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len);
970 }
971
972 if (type) {
973 struct rtattr *linkinfo;
974 char *ulinep = strchr(type, '_');
975 int iflatype;
976
977 linkinfo = addattr_nest(&req.n, sizeof(req), IFLA_LINKINFO);
978 addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
979 strlen(type));
980
981 lu = get_link_kind(type);
982 if (ulinep && !strcmp(ulinep, "_slave"))
983 iflatype = IFLA_INFO_SLAVE_DATA;
984 else
985 iflatype = IFLA_INFO_DATA;
986 if (lu && argc) {
987 struct rtattr *data
988 = addattr_nest(&req.n,
989 sizeof(req), iflatype);
990
991 if (lu->parse_opt &&
992 lu->parse_opt(lu, argc, argv, &req.n))
993 return -1;
994
995 addattr_nest_end(&req.n, data);
996 } else if (argc) {
997 if (matches(*argv, "help") == 0)
998 usage();
999 fprintf(stderr,
1000 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
1001 *argv);
1002 return -1;
1003 }
1004 addattr_nest_end(&req.n, linkinfo);
1005 } else if (flags & NLM_F_CREATE) {
1006 fprintf(stderr,
1007 "Not enough information: \"type\" argument is required\n");
1008 return -1;
1009 }
1010
1011 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
1012 return -2;
1013
1014 return 0;
1015 }
1016
1017 int iplink_get(unsigned int flags, char *name, __u32 filt_mask)
1018 {
1019 int len;
1020 struct iplink_req req = {
1021 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
1022 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1023 .n.nlmsg_type = RTM_GETLINK,
1024 .i.ifi_family = preferred_family,
1025 };
1026 struct {
1027 struct nlmsghdr n;
1028 char buf[16384];
1029 } answer;
1030
1031 if (name) {
1032 len = strlen(name) + 1;
1033 if (len == 1)
1034 invarg("\"\" is not a valid device identifier\n",
1035 "name");
1036 if (len > IFNAMSIZ)
1037 invarg("\"name\" too long\n", name);
1038 addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len);
1039 }
1040 addattr32(&req.n, sizeof(req), IFLA_EXT_MASK, filt_mask);
1041
1042 if (rtnl_talk(&rth, &req.n, &answer.n, sizeof(answer)) < 0)
1043 return -2;
1044
1045 if (brief)
1046 print_linkinfo_brief(NULL, &answer.n, stdout, NULL);
1047 else
1048 print_linkinfo(NULL, &answer.n, stdout);
1049
1050 return 0;
1051 }
1052
1053 #if IPLINK_IOCTL_COMPAT
1054 static int get_ctl_fd(void)
1055 {
1056 int s_errno;
1057 int fd;
1058
1059 fd = socket(PF_INET, SOCK_DGRAM, 0);
1060 if (fd >= 0)
1061 return fd;
1062 s_errno = errno;
1063 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
1064 if (fd >= 0)
1065 return fd;
1066 fd = socket(PF_INET6, SOCK_DGRAM, 0);
1067 if (fd >= 0)
1068 return fd;
1069 errno = s_errno;
1070 perror("Cannot create control socket");
1071 return -1;
1072 }
1073
1074 static int do_chflags(const char *dev, __u32 flags, __u32 mask)
1075 {
1076 struct ifreq ifr;
1077 int fd;
1078 int err;
1079
1080 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1081 fd = get_ctl_fd();
1082 if (fd < 0)
1083 return -1;
1084 err = ioctl(fd, SIOCGIFFLAGS, &ifr);
1085 if (err) {
1086 perror("SIOCGIFFLAGS");
1087 close(fd);
1088 return -1;
1089 }
1090 if ((ifr.ifr_flags^flags)&mask) {
1091 ifr.ifr_flags &= ~mask;
1092 ifr.ifr_flags |= mask&flags;
1093 err = ioctl(fd, SIOCSIFFLAGS, &ifr);
1094 if (err)
1095 perror("SIOCSIFFLAGS");
1096 }
1097 close(fd);
1098 return err;
1099 }
1100
1101 static int do_changename(const char *dev, const char *newdev)
1102 {
1103 struct ifreq ifr;
1104 int fd;
1105 int err;
1106
1107 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1108 strncpy(ifr.ifr_newname, newdev, IFNAMSIZ);
1109 fd = get_ctl_fd();
1110 if (fd < 0)
1111 return -1;
1112 err = ioctl(fd, SIOCSIFNAME, &ifr);
1113 if (err) {
1114 perror("SIOCSIFNAME");
1115 close(fd);
1116 return -1;
1117 }
1118 close(fd);
1119 return err;
1120 }
1121
1122 static int set_qlen(const char *dev, int qlen)
1123 {
1124 struct ifreq ifr = { .ifr_qlen = qlen };
1125 int s;
1126
1127 s = get_ctl_fd();
1128 if (s < 0)
1129 return -1;
1130
1131 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1132 if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
1133 perror("SIOCSIFXQLEN");
1134 close(s);
1135 return -1;
1136 }
1137 close(s);
1138
1139 return 0;
1140 }
1141
1142 static int set_mtu(const char *dev, int mtu)
1143 {
1144 struct ifreq ifr = { .ifr_mtu = mtu };
1145 int s;
1146
1147 s = get_ctl_fd();
1148 if (s < 0)
1149 return -1;
1150
1151 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1152 if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
1153 perror("SIOCSIFMTU");
1154 close(s);
1155 return -1;
1156 }
1157 close(s);
1158
1159 return 0;
1160 }
1161
1162 static int get_address(const char *dev, int *htype)
1163 {
1164 struct ifreq ifr = {};
1165 struct sockaddr_ll me = {
1166 .sll_family = AF_PACKET,
1167 .sll_protocol = htons(ETH_P_LOOP),
1168 };
1169 socklen_t alen;
1170 int s;
1171
1172 s = socket(PF_PACKET, SOCK_DGRAM, 0);
1173 if (s < 0) {
1174 perror("socket(PF_PACKET)");
1175 return -1;
1176 }
1177
1178 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1179 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
1180 perror("SIOCGIFINDEX");
1181 close(s);
1182 return -1;
1183 }
1184
1185 me.sll_ifindex = ifr.ifr_ifindex;
1186 if (bind(s, (struct sockaddr *)&me, sizeof(me)) == -1) {
1187 perror("bind");
1188 close(s);
1189 return -1;
1190 }
1191
1192 alen = sizeof(me);
1193 if (getsockname(s, (struct sockaddr *)&me, &alen) == -1) {
1194 perror("getsockname");
1195 close(s);
1196 return -1;
1197 }
1198 close(s);
1199 *htype = me.sll_hatype;
1200 return me.sll_halen;
1201 }
1202
1203 static int parse_address(const char *dev, int hatype, int halen,
1204 char *lla, struct ifreq *ifr)
1205 {
1206 int alen;
1207
1208 memset(ifr, 0, sizeof(*ifr));
1209 strncpy(ifr->ifr_name, dev, IFNAMSIZ);
1210 ifr->ifr_hwaddr.sa_family = hatype;
1211 alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
1212 if (alen < 0)
1213 return -1;
1214 if (alen != halen) {
1215 fprintf(stderr,
1216 "Wrong address (%s) length: expected %d bytes\n",
1217 lla, halen);
1218 return -1;
1219 }
1220 return 0;
1221 }
1222
1223 static int set_address(struct ifreq *ifr, int brd)
1224 {
1225 int s;
1226
1227 s = get_ctl_fd();
1228 if (s < 0)
1229 return -1;
1230 if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
1231 perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
1232 close(s);
1233 return -1;
1234 }
1235 close(s);
1236 return 0;
1237 }
1238
1239 static int do_set(int argc, char **argv)
1240 {
1241 char *dev = NULL;
1242 __u32 mask = 0;
1243 __u32 flags = 0;
1244 int qlen = -1;
1245 int mtu = -1;
1246 char *newaddr = NULL;
1247 char *newbrd = NULL;
1248 struct ifreq ifr0, ifr1;
1249 char *newname = NULL;
1250 int htype, halen;
1251
1252 while (argc > 0) {
1253 if (strcmp(*argv, "up") == 0) {
1254 mask |= IFF_UP;
1255 flags |= IFF_UP;
1256 } else if (strcmp(*argv, "down") == 0) {
1257 mask |= IFF_UP;
1258 flags &= ~IFF_UP;
1259 } else if (strcmp(*argv, "name") == 0) {
1260 NEXT_ARG();
1261 newname = *argv;
1262 } else if (matches(*argv, "address") == 0) {
1263 NEXT_ARG();
1264 newaddr = *argv;
1265 } else if (matches(*argv, "broadcast") == 0 ||
1266 strcmp(*argv, "brd") == 0) {
1267 NEXT_ARG();
1268 newbrd = *argv;
1269 } else if (matches(*argv, "txqueuelen") == 0 ||
1270 strcmp(*argv, "qlen") == 0 ||
1271 matches(*argv, "txqlen") == 0) {
1272 NEXT_ARG();
1273 if (qlen != -1)
1274 duparg("txqueuelen", *argv);
1275 if (get_integer(&qlen, *argv, 0))
1276 invarg("Invalid \"txqueuelen\" value\n", *argv);
1277 } else if (strcmp(*argv, "mtu") == 0) {
1278 NEXT_ARG();
1279 if (mtu != -1)
1280 duparg("mtu", *argv);
1281 if (get_integer(&mtu, *argv, 0))
1282 invarg("Invalid \"mtu\" value\n", *argv);
1283 } else if (strcmp(*argv, "multicast") == 0) {
1284 NEXT_ARG();
1285 mask |= IFF_MULTICAST;
1286
1287 if (strcmp(*argv, "on") == 0)
1288 flags |= IFF_MULTICAST;
1289 else if (strcmp(*argv, "off") == 0)
1290 flags &= ~IFF_MULTICAST;
1291 else
1292 return on_off("multicast", *argv);
1293 } else if (strcmp(*argv, "allmulticast") == 0) {
1294 NEXT_ARG();
1295 mask |= IFF_ALLMULTI;
1296
1297 if (strcmp(*argv, "on") == 0)
1298 flags |= IFF_ALLMULTI;
1299 else if (strcmp(*argv, "off") == 0)
1300 flags &= ~IFF_ALLMULTI;
1301 else
1302 return on_off("allmulticast", *argv);
1303 } else if (strcmp(*argv, "promisc") == 0) {
1304 NEXT_ARG();
1305 mask |= IFF_PROMISC;
1306
1307 if (strcmp(*argv, "on") == 0)
1308 flags |= IFF_PROMISC;
1309 else if (strcmp(*argv, "off") == 0)
1310 flags &= ~IFF_PROMISC;
1311 else
1312 return on_off("promisc", *argv);
1313 } else if (strcmp(*argv, "trailers") == 0) {
1314 NEXT_ARG();
1315 mask |= IFF_NOTRAILERS;
1316
1317 if (strcmp(*argv, "off") == 0)
1318 flags |= IFF_NOTRAILERS;
1319 else if (strcmp(*argv, "on") == 0)
1320 flags &= ~IFF_NOTRAILERS;
1321 else
1322 return on_off("trailers", *argv);
1323 } else if (strcmp(*argv, "arp") == 0) {
1324 NEXT_ARG();
1325 mask |= IFF_NOARP;
1326
1327 if (strcmp(*argv, "on") == 0)
1328 flags &= ~IFF_NOARP;
1329 else if (strcmp(*argv, "off") == 0)
1330 flags |= IFF_NOARP;
1331 else
1332 return on_off("arp", *argv);
1333 } else if (matches(*argv, "dynamic") == 0) {
1334 NEXT_ARG();
1335 mask |= IFF_DYNAMIC;
1336
1337 if (strcmp(*argv, "on") == 0)
1338 flags |= IFF_DYNAMIC;
1339 else if (strcmp(*argv, "off") == 0)
1340 flags &= ~IFF_DYNAMIC;
1341 else
1342 return on_off("dynamic", *argv);
1343 } else {
1344 if (strcmp(*argv, "dev") == 0)
1345 NEXT_ARG();
1346 else if (matches(*argv, "help") == 0)
1347 usage();
1348
1349 if (dev)
1350 duparg2("dev", *argv);
1351 dev = *argv;
1352 }
1353 argc--; argv++;
1354 }
1355
1356 if (!dev) {
1357 fprintf(stderr,
1358 "Not enough of information: \"dev\" argument is required.\n");
1359 exit(-1);
1360 }
1361
1362 if (newaddr || newbrd) {
1363 halen = get_address(dev, &htype);
1364 if (halen < 0)
1365 return -1;
1366 if (newaddr) {
1367 if (parse_address(dev, htype, halen,
1368 newaddr, &ifr0) < 0)
1369 return -1;
1370 }
1371 if (newbrd) {
1372 if (parse_address(dev, htype, halen,
1373 newbrd, &ifr1) < 0)
1374 return -1;
1375 }
1376 }
1377
1378 if (newname && strcmp(dev, newname)) {
1379 if (strlen(newname) == 0)
1380 invarg("\"\" is not a valid device identifier\n",
1381 "name");
1382 if (do_changename(dev, newname) < 0)
1383 return -1;
1384 dev = newname;
1385 }
1386 if (qlen != -1) {
1387 if (set_qlen(dev, qlen) < 0)
1388 return -1;
1389 }
1390 if (mtu != -1) {
1391 if (set_mtu(dev, mtu) < 0)
1392 return -1;
1393 }
1394 if (newaddr || newbrd) {
1395 if (newbrd) {
1396 if (set_address(&ifr1, 1) < 0)
1397 return -1;
1398 }
1399 if (newaddr) {
1400 if (set_address(&ifr0, 0) < 0)
1401 return -1;
1402 }
1403 }
1404 if (mask)
1405 return do_chflags(dev, flags, mask);
1406 return 0;
1407 }
1408 #endif /* IPLINK_IOCTL_COMPAT */
1409
1410 static void print_mpls_stats(FILE *fp, struct rtattr *attr)
1411 {
1412 struct rtattr *mrtb[MPLS_STATS_MAX+1];
1413 struct mpls_link_stats *stats;
1414
1415 parse_rtattr(mrtb, MPLS_STATS_MAX, RTA_DATA(attr),
1416 RTA_PAYLOAD(attr));
1417 if (!mrtb[MPLS_STATS_LINK])
1418 return;
1419
1420 stats = RTA_DATA(mrtb[MPLS_STATS_LINK]);
1421
1422 fprintf(fp, " mpls:\n");
1423 fprintf(fp, " RX: bytes packets errors dropped noroute\n");
1424 fprintf(fp, " ");
1425 print_num(fp, 10, stats->rx_bytes);
1426 print_num(fp, 8, stats->rx_packets);
1427 print_num(fp, 7, stats->rx_errors);
1428 print_num(fp, 8, stats->rx_dropped);
1429 print_num(fp, 7, stats->rx_noroute);
1430 fprintf(fp, "\n");
1431 fprintf(fp, " TX: bytes packets errors dropped\n");
1432 fprintf(fp, " ");
1433 print_num(fp, 10, stats->tx_bytes);
1434 print_num(fp, 8, stats->tx_packets);
1435 print_num(fp, 7, stats->tx_errors);
1436 print_num(fp, 7, stats->tx_dropped);
1437 fprintf(fp, "\n");
1438 }
1439
1440 static void print_af_stats_attr(FILE *fp, int ifindex, struct rtattr *attr)
1441 {
1442 bool if_printed = false;
1443 struct rtattr *i;
1444 int rem;
1445
1446 rem = RTA_PAYLOAD(attr);
1447 for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
1448 if (preferred_family != AF_UNSPEC &&
1449 i->rta_type != preferred_family)
1450 continue;
1451
1452 if (!if_printed) {
1453 fprintf(fp, "%u: %s\n", ifindex,
1454 ll_index_to_name(ifindex));
1455 if_printed = true;
1456 }
1457
1458 switch (i->rta_type) {
1459 case AF_MPLS:
1460 print_mpls_stats(fp, i);
1461 break;
1462 default:
1463 fprintf(fp, " unknown af(%d)\n", i->rta_type);
1464 break;
1465 }
1466 }
1467 }
1468
1469 struct af_stats_ctx {
1470 FILE *fp;
1471 int ifindex;
1472 };
1473
1474 static int print_af_stats(const struct sockaddr_nl *who,
1475 struct nlmsghdr *n,
1476 void *arg)
1477 {
1478 struct if_stats_msg *ifsm = NLMSG_DATA(n);
1479 struct rtattr *tb[IFLA_STATS_MAX+1];
1480 int len = n->nlmsg_len;
1481 struct af_stats_ctx *ctx = arg;
1482 FILE *fp = ctx->fp;
1483
1484 len -= NLMSG_LENGTH(sizeof(*ifsm));
1485 if (len < 0) {
1486 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
1487 return -1;
1488 }
1489
1490 if (ctx->ifindex && ifsm->ifindex != ctx->ifindex)
1491 return 0;
1492
1493 parse_rtattr(tb, IFLA_STATS_MAX, IFLA_STATS_RTA(ifsm), len);
1494
1495 if (tb[IFLA_STATS_AF_SPEC])
1496 print_af_stats_attr(fp, ifsm->ifindex, tb[IFLA_STATS_AF_SPEC]);
1497
1498 fflush(fp);
1499 return 0;
1500 }
1501
1502 static int iplink_afstats(int argc, char **argv)
1503 {
1504 __u32 filt_mask = IFLA_STATS_FILTER_BIT(IFLA_STATS_AF_SPEC);
1505 const char *filter_dev = NULL;
1506 struct af_stats_ctx ctx = {
1507 .fp = stdout,
1508 .ifindex = 0,
1509 };
1510
1511 while (argc > 0) {
1512 if (strcmp(*argv, "dev") == 0) {
1513 NEXT_ARG();
1514 if (filter_dev)
1515 duparg2("dev", *argv);
1516 filter_dev = *argv;
1517 } else if (matches(*argv, "help") == 0) {
1518 usage();
1519 } else {
1520 fprintf(stderr,
1521 "Command \"%s\" is unknown, try \"ip link help\".\n",
1522 *argv);
1523 exit(-1);
1524 }
1525
1526 argv++; argc--;
1527 }
1528
1529 if (filter_dev) {
1530 ctx.ifindex = ll_name_to_index(filter_dev);
1531 if (ctx.ifindex <= 0) {
1532 fprintf(stderr,
1533 "Device \"%s\" does not exist.\n",
1534 filter_dev);
1535 return -1;
1536 }
1537 }
1538
1539 if (rtnl_wilddump_stats_req_filter(&rth, AF_UNSPEC,
1540 RTM_GETSTATS,
1541 filt_mask) < 0) {
1542 perror("Cannont send dump request");
1543 return 1;
1544 }
1545
1546 if (rtnl_dump_filter(&rth, print_af_stats, &ctx) < 0) {
1547 fprintf(stderr, "Dump terminated\n");
1548 return 1;
1549 }
1550
1551 return 0;
1552 }
1553
1554 static void do_help(int argc, char **argv)
1555 {
1556 struct link_util *lu = NULL;
1557
1558 if (argc <= 0) {
1559 usage();
1560 return;
1561 }
1562
1563 lu = get_link_kind(*argv);
1564 if (lu && lu->print_help)
1565 lu->print_help(lu, argc-1, argv+1, stdout);
1566 else
1567 usage();
1568 }
1569
1570 int do_iplink(int argc, char **argv)
1571 {
1572 if (argc < 1)
1573 return ipaddr_list_link(0, NULL);
1574
1575 if (iplink_have_newlink()) {
1576 if (matches(*argv, "add") == 0)
1577 return iplink_modify(RTM_NEWLINK,
1578 NLM_F_CREATE|NLM_F_EXCL,
1579 argc-1, argv+1);
1580 if (matches(*argv, "set") == 0 ||
1581 matches(*argv, "change") == 0)
1582 return iplink_modify(RTM_NEWLINK, 0,
1583 argc-1, argv+1);
1584 if (matches(*argv, "replace") == 0)
1585 return iplink_modify(RTM_NEWLINK,
1586 NLM_F_CREATE|NLM_F_REPLACE,
1587 argc-1, argv+1);
1588 if (matches(*argv, "delete") == 0)
1589 return iplink_modify(RTM_DELLINK, 0,
1590 argc-1, argv+1);
1591 } else {
1592 #if IPLINK_IOCTL_COMPAT
1593 if (matches(*argv, "set") == 0)
1594 return do_set(argc-1, argv+1);
1595 #endif
1596 }
1597
1598 if (matches(*argv, "show") == 0 ||
1599 matches(*argv, "lst") == 0 ||
1600 matches(*argv, "list") == 0)
1601 return ipaddr_list_link(argc-1, argv+1);
1602
1603 if (matches(*argv, "xstats") == 0)
1604 return iplink_ifla_xstats(argc-1, argv+1);
1605
1606 if (matches(*argv, "afstats") == 0) {
1607 iplink_afstats(argc-1, argv+1);
1608 return 0;
1609 }
1610
1611 if (matches(*argv, "help") == 0) {
1612 do_help(argc-1, argv+1);
1613 return 0;
1614 }
1615
1616 fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n",
1617 *argv);
1618 exit(-1);
1619 }
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