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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 <stdbool.h>
30 #include <linux/mpls.h>
31
32 #include "rt_names.h"
33 #include "utils.h"
34 #include "ip_common.h"
35 #include "xdp.h"
36 #include "namespace.h"
37
38 #define IPLINK_IOCTL_COMPAT 1
39 #ifndef LIBDIR
40 #define LIBDIR "/usr/lib"
41 #endif
42
43 static void usage(void) __attribute__((noreturn));
44 static int iplink_have_newlink(void);
45
46 void iplink_usage(void)
47 {
48 if (iplink_have_newlink()) {
49 fprintf(stderr,
50 "Usage: ip link add [link DEV] [ name ] NAME\n"
51 " [ txqueuelen PACKETS ]\n"
52 " [ address LLADDR ]\n"
53 " [ broadcast LLADDR ]\n"
54 " [ mtu MTU ] [index IDX ]\n"
55 " [ numtxqueues QUEUE_COUNT ]\n"
56 " [ numrxqueues QUEUE_COUNT ]\n"
57 " type TYPE [ ARGS ]\n"
58 "\n"
59 " ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n"
60 "\n"
61 " ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n"
62 " [ { up | down } ]\n"
63 " [ type TYPE ARGS ]\n");
64 } else
65 fprintf(stderr,
66 "Usage: ip link set DEVICE [ { up | down } ]\n");
67
68 fprintf(stderr,
69 " [ arp { on | off } ]\n"
70 " [ dynamic { on | off } ]\n"
71 " [ multicast { on | off } ]\n"
72 " [ allmulticast { on | off } ]\n"
73 " [ promisc { on | off } ]\n"
74 " [ trailers { on | off } ]\n"
75 " [ carrier { on | off } ]\n"
76 " [ txqueuelen PACKETS ]\n"
77 " [ name NEWNAME ]\n"
78 " [ address LLADDR ]\n"
79 " [ broadcast LLADDR ]\n"
80 " [ mtu MTU ]\n"
81 " [ netns { PID | NAME } ]\n"
82 " [ link-netnsid ID ]\n"
83 " [ alias NAME ]\n"
84 " [ vf NUM [ mac LLADDR ]\n"
85 " [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-PROTO ] ]\n"
86 " [ rate TXRATE ]\n"
87 " [ max_tx_rate TXRATE ]\n"
88 " [ min_tx_rate TXRATE ]\n"
89 " [ spoofchk { on | off} ]\n"
90 " [ query_rss { on | off} ]\n"
91 " [ state { auto | enable | disable} ] ]\n"
92 " [ trust { on | off} ] ]\n"
93 " [ node_guid { eui64 } ]\n"
94 " [ port_guid { eui64 } ]\n"
95 " [ xdp { off |\n"
96 " object FILE [ section NAME ] [ verbose ] |\n"
97 " pinned FILE } ]\n"
98 " [ master DEVICE ][ vrf NAME ]\n"
99 " [ nomaster ]\n"
100 " [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
101 " [ protodown { on | off } ]\n"
102 "\n"
103 " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n");
104
105 fprintf(stderr, "\n ip link xstats type TYPE [ ARGS ]\n");
106 fprintf(stderr, "\n ip link afstats [ dev DEVICE ]\n");
107
108 if (iplink_have_newlink()) {
109 fprintf(stderr,
110 "\n"
111 " ip link help [ TYPE ]\n"
112 "\n"
113 "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | macvtap |\n"
114 " bridge | bond | team | ipoib | ip6tnl | ipip | sit | vxlan |\n"
115 " gre | gretap | erspan | ip6gre | ip6gretap | vti | nlmon |\n"
116 " team_slave | bond_slave | ipvlan | geneve | bridge_slave |\n"
117 " 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 open_json_object(NULL);
1046 if (brief)
1047 print_linkinfo_brief(NULL, &answer.n, stdout, NULL);
1048 else
1049 print_linkinfo(NULL, &answer.n, stdout);
1050 close_json_object();
1051
1052 return 0;
1053 }
1054
1055 #if IPLINK_IOCTL_COMPAT
1056 static int get_ctl_fd(void)
1057 {
1058 int s_errno;
1059 int fd;
1060
1061 fd = socket(PF_INET, SOCK_DGRAM, 0);
1062 if (fd >= 0)
1063 return fd;
1064 s_errno = errno;
1065 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
1066 if (fd >= 0)
1067 return fd;
1068 fd = socket(PF_INET6, SOCK_DGRAM, 0);
1069 if (fd >= 0)
1070 return fd;
1071 errno = s_errno;
1072 perror("Cannot create control socket");
1073 return -1;
1074 }
1075
1076 static int do_chflags(const char *dev, __u32 flags, __u32 mask)
1077 {
1078 struct ifreq ifr;
1079 int fd;
1080 int err;
1081
1082 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1083 fd = get_ctl_fd();
1084 if (fd < 0)
1085 return -1;
1086 err = ioctl(fd, SIOCGIFFLAGS, &ifr);
1087 if (err) {
1088 perror("SIOCGIFFLAGS");
1089 close(fd);
1090 return -1;
1091 }
1092 if ((ifr.ifr_flags^flags)&mask) {
1093 ifr.ifr_flags &= ~mask;
1094 ifr.ifr_flags |= mask&flags;
1095 err = ioctl(fd, SIOCSIFFLAGS, &ifr);
1096 if (err)
1097 perror("SIOCSIFFLAGS");
1098 }
1099 close(fd);
1100 return err;
1101 }
1102
1103 static int do_changename(const char *dev, const char *newdev)
1104 {
1105 struct ifreq ifr;
1106 int fd;
1107 int err;
1108
1109 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1110 strncpy(ifr.ifr_newname, newdev, IFNAMSIZ);
1111 fd = get_ctl_fd();
1112 if (fd < 0)
1113 return -1;
1114 err = ioctl(fd, SIOCSIFNAME, &ifr);
1115 if (err) {
1116 perror("SIOCSIFNAME");
1117 close(fd);
1118 return -1;
1119 }
1120 close(fd);
1121 return err;
1122 }
1123
1124 static int set_qlen(const char *dev, int qlen)
1125 {
1126 struct ifreq ifr = { .ifr_qlen = qlen };
1127 int s;
1128
1129 s = get_ctl_fd();
1130 if (s < 0)
1131 return -1;
1132
1133 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1134 if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
1135 perror("SIOCSIFXQLEN");
1136 close(s);
1137 return -1;
1138 }
1139 close(s);
1140
1141 return 0;
1142 }
1143
1144 static int set_mtu(const char *dev, int mtu)
1145 {
1146 struct ifreq ifr = { .ifr_mtu = mtu };
1147 int s;
1148
1149 s = get_ctl_fd();
1150 if (s < 0)
1151 return -1;
1152
1153 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1154 if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
1155 perror("SIOCSIFMTU");
1156 close(s);
1157 return -1;
1158 }
1159 close(s);
1160
1161 return 0;
1162 }
1163
1164 static int get_address(const char *dev, int *htype)
1165 {
1166 struct ifreq ifr = {};
1167 struct sockaddr_ll me = {
1168 .sll_family = AF_PACKET,
1169 .sll_protocol = htons(ETH_P_LOOP),
1170 };
1171 socklen_t alen;
1172 int s;
1173
1174 s = socket(PF_PACKET, SOCK_DGRAM, 0);
1175 if (s < 0) {
1176 perror("socket(PF_PACKET)");
1177 return -1;
1178 }
1179
1180 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1181 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
1182 perror("SIOCGIFINDEX");
1183 close(s);
1184 return -1;
1185 }
1186
1187 me.sll_ifindex = ifr.ifr_ifindex;
1188 if (bind(s, (struct sockaddr *)&me, sizeof(me)) == -1) {
1189 perror("bind");
1190 close(s);
1191 return -1;
1192 }
1193
1194 alen = sizeof(me);
1195 if (getsockname(s, (struct sockaddr *)&me, &alen) == -1) {
1196 perror("getsockname");
1197 close(s);
1198 return -1;
1199 }
1200 close(s);
1201 *htype = me.sll_hatype;
1202 return me.sll_halen;
1203 }
1204
1205 static int parse_address(const char *dev, int hatype, int halen,
1206 char *lla, struct ifreq *ifr)
1207 {
1208 int alen;
1209
1210 memset(ifr, 0, sizeof(*ifr));
1211 strncpy(ifr->ifr_name, dev, IFNAMSIZ);
1212 ifr->ifr_hwaddr.sa_family = hatype;
1213 alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
1214 if (alen < 0)
1215 return -1;
1216 if (alen != halen) {
1217 fprintf(stderr,
1218 "Wrong address (%s) length: expected %d bytes\n",
1219 lla, halen);
1220 return -1;
1221 }
1222 return 0;
1223 }
1224
1225 static int set_address(struct ifreq *ifr, int brd)
1226 {
1227 int s;
1228
1229 s = get_ctl_fd();
1230 if (s < 0)
1231 return -1;
1232 if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
1233 perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
1234 close(s);
1235 return -1;
1236 }
1237 close(s);
1238 return 0;
1239 }
1240
1241 static int do_set(int argc, char **argv)
1242 {
1243 char *dev = NULL;
1244 __u32 mask = 0;
1245 __u32 flags = 0;
1246 int qlen = -1;
1247 int mtu = -1;
1248 char *newaddr = NULL;
1249 char *newbrd = NULL;
1250 struct ifreq ifr0, ifr1;
1251 char *newname = NULL;
1252 int htype, halen;
1253
1254 while (argc > 0) {
1255 if (strcmp(*argv, "up") == 0) {
1256 mask |= IFF_UP;
1257 flags |= IFF_UP;
1258 } else if (strcmp(*argv, "down") == 0) {
1259 mask |= IFF_UP;
1260 flags &= ~IFF_UP;
1261 } else if (strcmp(*argv, "name") == 0) {
1262 NEXT_ARG();
1263 newname = *argv;
1264 } else if (matches(*argv, "address") == 0) {
1265 NEXT_ARG();
1266 newaddr = *argv;
1267 } else if (matches(*argv, "broadcast") == 0 ||
1268 strcmp(*argv, "brd") == 0) {
1269 NEXT_ARG();
1270 newbrd = *argv;
1271 } else if (matches(*argv, "txqueuelen") == 0 ||
1272 strcmp(*argv, "qlen") == 0 ||
1273 matches(*argv, "txqlen") == 0) {
1274 NEXT_ARG();
1275 if (qlen != -1)
1276 duparg("txqueuelen", *argv);
1277 if (get_integer(&qlen, *argv, 0))
1278 invarg("Invalid \"txqueuelen\" value\n", *argv);
1279 } else if (strcmp(*argv, "mtu") == 0) {
1280 NEXT_ARG();
1281 if (mtu != -1)
1282 duparg("mtu", *argv);
1283 if (get_integer(&mtu, *argv, 0))
1284 invarg("Invalid \"mtu\" value\n", *argv);
1285 } else if (strcmp(*argv, "multicast") == 0) {
1286 NEXT_ARG();
1287 mask |= IFF_MULTICAST;
1288
1289 if (strcmp(*argv, "on") == 0)
1290 flags |= IFF_MULTICAST;
1291 else if (strcmp(*argv, "off") == 0)
1292 flags &= ~IFF_MULTICAST;
1293 else
1294 return on_off("multicast", *argv);
1295 } else if (strcmp(*argv, "allmulticast") == 0) {
1296 NEXT_ARG();
1297 mask |= IFF_ALLMULTI;
1298
1299 if (strcmp(*argv, "on") == 0)
1300 flags |= IFF_ALLMULTI;
1301 else if (strcmp(*argv, "off") == 0)
1302 flags &= ~IFF_ALLMULTI;
1303 else
1304 return on_off("allmulticast", *argv);
1305 } else if (strcmp(*argv, "promisc") == 0) {
1306 NEXT_ARG();
1307 mask |= IFF_PROMISC;
1308
1309 if (strcmp(*argv, "on") == 0)
1310 flags |= IFF_PROMISC;
1311 else if (strcmp(*argv, "off") == 0)
1312 flags &= ~IFF_PROMISC;
1313 else
1314 return on_off("promisc", *argv);
1315 } else if (strcmp(*argv, "trailers") == 0) {
1316 NEXT_ARG();
1317 mask |= IFF_NOTRAILERS;
1318
1319 if (strcmp(*argv, "off") == 0)
1320 flags |= IFF_NOTRAILERS;
1321 else if (strcmp(*argv, "on") == 0)
1322 flags &= ~IFF_NOTRAILERS;
1323 else
1324 return on_off("trailers", *argv);
1325 } else if (strcmp(*argv, "arp") == 0) {
1326 NEXT_ARG();
1327 mask |= IFF_NOARP;
1328
1329 if (strcmp(*argv, "on") == 0)
1330 flags &= ~IFF_NOARP;
1331 else if (strcmp(*argv, "off") == 0)
1332 flags |= IFF_NOARP;
1333 else
1334 return on_off("arp", *argv);
1335 } else if (matches(*argv, "dynamic") == 0) {
1336 NEXT_ARG();
1337 mask |= IFF_DYNAMIC;
1338
1339 if (strcmp(*argv, "on") == 0)
1340 flags |= IFF_DYNAMIC;
1341 else if (strcmp(*argv, "off") == 0)
1342 flags &= ~IFF_DYNAMIC;
1343 else
1344 return on_off("dynamic", *argv);
1345 } else {
1346 if (strcmp(*argv, "dev") == 0)
1347 NEXT_ARG();
1348 else if (matches(*argv, "help") == 0)
1349 usage();
1350
1351 if (dev)
1352 duparg2("dev", *argv);
1353 dev = *argv;
1354 }
1355 argc--; argv++;
1356 }
1357
1358 if (!dev) {
1359 fprintf(stderr,
1360 "Not enough of information: \"dev\" argument is required.\n");
1361 exit(-1);
1362 }
1363
1364 if (newaddr || newbrd) {
1365 halen = get_address(dev, &htype);
1366 if (halen < 0)
1367 return -1;
1368 if (newaddr) {
1369 if (parse_address(dev, htype, halen,
1370 newaddr, &ifr0) < 0)
1371 return -1;
1372 }
1373 if (newbrd) {
1374 if (parse_address(dev, htype, halen,
1375 newbrd, &ifr1) < 0)
1376 return -1;
1377 }
1378 }
1379
1380 if (newname && strcmp(dev, newname)) {
1381 if (strlen(newname) == 0)
1382 invarg("\"\" is not a valid device identifier\n",
1383 "name");
1384 if (do_changename(dev, newname) < 0)
1385 return -1;
1386 dev = newname;
1387 }
1388 if (qlen != -1) {
1389 if (set_qlen(dev, qlen) < 0)
1390 return -1;
1391 }
1392 if (mtu != -1) {
1393 if (set_mtu(dev, mtu) < 0)
1394 return -1;
1395 }
1396 if (newaddr || newbrd) {
1397 if (newbrd) {
1398 if (set_address(&ifr1, 1) < 0)
1399 return -1;
1400 }
1401 if (newaddr) {
1402 if (set_address(&ifr0, 0) < 0)
1403 return -1;
1404 }
1405 }
1406 if (mask)
1407 return do_chflags(dev, flags, mask);
1408 return 0;
1409 }
1410 #endif /* IPLINK_IOCTL_COMPAT */
1411
1412 static void print_mpls_stats(FILE *fp, struct rtattr *attr)
1413 {
1414 struct rtattr *mrtb[MPLS_STATS_MAX+1];
1415 struct mpls_link_stats *stats;
1416
1417 parse_rtattr(mrtb, MPLS_STATS_MAX, RTA_DATA(attr),
1418 RTA_PAYLOAD(attr));
1419 if (!mrtb[MPLS_STATS_LINK])
1420 return;
1421
1422 stats = RTA_DATA(mrtb[MPLS_STATS_LINK]);
1423
1424 fprintf(fp, " mpls:\n");
1425 fprintf(fp, " RX: bytes packets errors dropped noroute\n");
1426 fprintf(fp, " ");
1427 print_num(fp, 10, stats->rx_bytes);
1428 print_num(fp, 8, stats->rx_packets);
1429 print_num(fp, 7, stats->rx_errors);
1430 print_num(fp, 8, stats->rx_dropped);
1431 print_num(fp, 7, stats->rx_noroute);
1432 fprintf(fp, "\n");
1433 fprintf(fp, " TX: bytes packets errors dropped\n");
1434 fprintf(fp, " ");
1435 print_num(fp, 10, stats->tx_bytes);
1436 print_num(fp, 8, stats->tx_packets);
1437 print_num(fp, 7, stats->tx_errors);
1438 print_num(fp, 7, stats->tx_dropped);
1439 fprintf(fp, "\n");
1440 }
1441
1442 static void print_af_stats_attr(FILE *fp, int ifindex, struct rtattr *attr)
1443 {
1444 bool if_printed = false;
1445 struct rtattr *i;
1446 int rem;
1447
1448 rem = RTA_PAYLOAD(attr);
1449 for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
1450 if (preferred_family != AF_UNSPEC &&
1451 i->rta_type != preferred_family)
1452 continue;
1453
1454 if (!if_printed) {
1455 fprintf(fp, "%u: %s\n", ifindex,
1456 ll_index_to_name(ifindex));
1457 if_printed = true;
1458 }
1459
1460 switch (i->rta_type) {
1461 case AF_MPLS:
1462 print_mpls_stats(fp, i);
1463 break;
1464 default:
1465 fprintf(fp, " unknown af(%d)\n", i->rta_type);
1466 break;
1467 }
1468 }
1469 }
1470
1471 struct af_stats_ctx {
1472 FILE *fp;
1473 int ifindex;
1474 };
1475
1476 static int print_af_stats(const struct sockaddr_nl *who,
1477 struct nlmsghdr *n,
1478 void *arg)
1479 {
1480 struct if_stats_msg *ifsm = NLMSG_DATA(n);
1481 struct rtattr *tb[IFLA_STATS_MAX+1];
1482 int len = n->nlmsg_len;
1483 struct af_stats_ctx *ctx = arg;
1484 FILE *fp = ctx->fp;
1485
1486 len -= NLMSG_LENGTH(sizeof(*ifsm));
1487 if (len < 0) {
1488 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
1489 return -1;
1490 }
1491
1492 if (ctx->ifindex && ifsm->ifindex != ctx->ifindex)
1493 return 0;
1494
1495 parse_rtattr(tb, IFLA_STATS_MAX, IFLA_STATS_RTA(ifsm), len);
1496
1497 if (tb[IFLA_STATS_AF_SPEC])
1498 print_af_stats_attr(fp, ifsm->ifindex, tb[IFLA_STATS_AF_SPEC]);
1499
1500 fflush(fp);
1501 return 0;
1502 }
1503
1504 static int iplink_afstats(int argc, char **argv)
1505 {
1506 __u32 filt_mask = IFLA_STATS_FILTER_BIT(IFLA_STATS_AF_SPEC);
1507 const char *filter_dev = NULL;
1508 struct af_stats_ctx ctx = {
1509 .fp = stdout,
1510 .ifindex = 0,
1511 };
1512
1513 while (argc > 0) {
1514 if (strcmp(*argv, "dev") == 0) {
1515 NEXT_ARG();
1516 if (filter_dev)
1517 duparg2("dev", *argv);
1518 filter_dev = *argv;
1519 } else if (matches(*argv, "help") == 0) {
1520 usage();
1521 } else {
1522 fprintf(stderr,
1523 "Command \"%s\" is unknown, try \"ip link help\".\n",
1524 *argv);
1525 exit(-1);
1526 }
1527
1528 argv++; argc--;
1529 }
1530
1531 if (filter_dev) {
1532 ctx.ifindex = ll_name_to_index(filter_dev);
1533 if (ctx.ifindex <= 0) {
1534 fprintf(stderr,
1535 "Device \"%s\" does not exist.\n",
1536 filter_dev);
1537 return -1;
1538 }
1539 }
1540
1541 if (rtnl_wilddump_stats_req_filter(&rth, AF_UNSPEC,
1542 RTM_GETSTATS,
1543 filt_mask) < 0) {
1544 perror("Cannont send dump request");
1545 return 1;
1546 }
1547
1548 if (rtnl_dump_filter(&rth, print_af_stats, &ctx) < 0) {
1549 fprintf(stderr, "Dump terminated\n");
1550 return 1;
1551 }
1552
1553 return 0;
1554 }
1555
1556 static void do_help(int argc, char **argv)
1557 {
1558 struct link_util *lu = NULL;
1559
1560 if (argc <= 0) {
1561 usage();
1562 return;
1563 }
1564
1565 lu = get_link_kind(*argv);
1566 if (lu && lu->print_help)
1567 lu->print_help(lu, argc-1, argv+1, stdout);
1568 else
1569 usage();
1570 }
1571
1572 int do_iplink(int argc, char **argv)
1573 {
1574 if (argc < 1)
1575 return ipaddr_list_link(0, NULL);
1576
1577 if (iplink_have_newlink()) {
1578 if (matches(*argv, "add") == 0)
1579 return iplink_modify(RTM_NEWLINK,
1580 NLM_F_CREATE|NLM_F_EXCL,
1581 argc-1, argv+1);
1582 if (matches(*argv, "set") == 0 ||
1583 matches(*argv, "change") == 0)
1584 return iplink_modify(RTM_NEWLINK, 0,
1585 argc-1, argv+1);
1586 if (matches(*argv, "replace") == 0)
1587 return iplink_modify(RTM_NEWLINK,
1588 NLM_F_CREATE|NLM_F_REPLACE,
1589 argc-1, argv+1);
1590 if (matches(*argv, "delete") == 0)
1591 return iplink_modify(RTM_DELLINK, 0,
1592 argc-1, argv+1);
1593 } else {
1594 #if IPLINK_IOCTL_COMPAT
1595 if (matches(*argv, "set") == 0)
1596 return do_set(argc-1, argv+1);
1597 #endif
1598 }
1599
1600 if (matches(*argv, "show") == 0 ||
1601 matches(*argv, "lst") == 0 ||
1602 matches(*argv, "list") == 0)
1603 return ipaddr_list_link(argc-1, argv+1);
1604
1605 if (matches(*argv, "xstats") == 0)
1606 return iplink_ifla_xstats(argc-1, argv+1);
1607
1608 if (matches(*argv, "afstats") == 0) {
1609 iplink_afstats(argc-1, argv+1);
1610 return 0;
1611 }
1612
1613 if (matches(*argv, "help") == 0) {
1614 do_help(argc-1, argv+1);
1615 return 0;
1616 }
1617
1618 fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n",
1619 *argv);
1620 exit(-1);
1621 }
Upstream mirror of iproute2