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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 <fcntl.h>
17 #include <dlfcn.h>
18 #include <errno.h>
19 #include <sys/socket.h>
20 #include <linux/if.h>
21 #include <linux/if_packet.h>
22 #include <linux/if_ether.h>
23 #include <linux/sockios.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
26 #include <string.h>
27 #include <sys/ioctl.h>
28 #include <stdbool.h>
29 #include <linux/mpls.h>
30
31 #include "rt_names.h"
32 #include "utils.h"
33 #include "ip_common.h"
34 #include "namespace.h"
35
36 #define IPLINK_IOCTL_COMPAT 1
37 #ifndef LIBDIR
38 #define LIBDIR "/usr/lib"
39 #endif
40
41 #ifndef GSO_MAX_SIZE
42 #define GSO_MAX_SIZE 65536
43 #endif
44 #ifndef GSO_MAX_SEGS
45 #define GSO_MAX_SEGS 65535
46 #endif
47
48
49 static void usage(void) __attribute__((noreturn));
50 static int iplink_have_newlink(void);
51
52 void iplink_usage(void)
53 {
54 if (iplink_have_newlink()) {
55 fprintf(stderr,
56 "Usage: ip link add [link DEV] [ name ] NAME\n"
57 " [ txqueuelen PACKETS ]\n"
58 " [ address LLADDR ]\n"
59 " [ broadcast LLADDR ]\n"
60 " [ mtu MTU ] [index IDX ]\n"
61 " [ numtxqueues QUEUE_COUNT ]\n"
62 " [ numrxqueues QUEUE_COUNT ]\n"
63 " type TYPE [ ARGS ]\n"
64 "\n"
65 " ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n"
66 "\n"
67 " ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n"
68 " [ { up | down } ]\n"
69 " [ type TYPE ARGS ]\n");
70 } else
71 fprintf(stderr,
72 "Usage: ip link set DEVICE [ { up | down } ]\n");
73
74 fprintf(stderr,
75 " [ arp { on | off } ]\n"
76 " [ dynamic { on | off } ]\n"
77 " [ multicast { on | off } ]\n"
78 " [ allmulticast { on | off } ]\n"
79 " [ promisc { on | off } ]\n"
80 " [ trailers { on | off } ]\n"
81 " [ carrier { on | off } ]\n"
82 " [ txqueuelen PACKETS ]\n"
83 " [ name NEWNAME ]\n"
84 " [ address LLADDR ]\n"
85 " [ broadcast LLADDR ]\n"
86 " [ mtu MTU ]\n"
87 " [ netns { PID | NAME } ]\n"
88 " [ link-netnsid ID ]\n"
89 " [ alias NAME ]\n"
90 " [ vf NUM [ mac LLADDR ]\n"
91 " [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-PROTO ] ]\n"
92 " [ rate TXRATE ]\n"
93 " [ max_tx_rate TXRATE ]\n"
94 " [ min_tx_rate TXRATE ]\n"
95 " [ spoofchk { on | off} ]\n"
96 " [ query_rss { on | off} ]\n"
97 " [ state { auto | enable | disable} ] ]\n"
98 " [ trust { on | off} ] ]\n"
99 " [ node_guid { eui64 } ]\n"
100 " [ port_guid { eui64 } ]\n"
101 " [ xdp { off |\n"
102 " object FILE [ section NAME ] [ verbose ] |\n"
103 " pinned FILE } ]\n"
104 " [ master DEVICE ][ vrf NAME ]\n"
105 " [ nomaster ]\n"
106 " [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
107 " [ protodown { on | off } ]\n"
108 " [ gso_max_size BYTES ] | [ gso_max_segs PACKETS ]\n"
109 "\n"
110 " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n");
111
112 fprintf(stderr, "\n ip link xstats type TYPE [ ARGS ]\n");
113 fprintf(stderr, "\n ip link afstats [ dev DEVICE ]\n");
114
115 if (iplink_have_newlink()) {
116 fprintf(stderr,
117 "\n"
118 " ip link help [ TYPE ]\n"
119 "\n"
120 "TYPE := { vlan | veth | vcan | vxcan | dummy | ifb | macvlan | macvtap |\n"
121 " bridge | bond | team | ipoib | ip6tnl | ipip | sit | vxlan |\n"
122 " gre | gretap | erspan | ip6gre | ip6gretap | ip6erspan |\n"
123 " vti | nlmon | team_slave | bond_slave | ipvlan | geneve |\n"
124 " bridge_slave | vrf | macsec | netdevsim }\n");
125 }
126 exit(-1);
127 }
128
129 static void usage(void)
130 {
131 iplink_usage();
132 }
133
134 static int on_off(const char *msg, const char *realval)
135 {
136 fprintf(stderr,
137 "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
138 msg, realval);
139 return -1;
140 }
141
142 static void *BODY; /* cached dlopen(NULL) handle */
143 static struct link_util *linkutil_list;
144
145 struct link_util *get_link_kind(const char *id)
146 {
147 void *dlh;
148 char buf[256];
149 struct link_util *l;
150
151 for (l = linkutil_list; l; l = l->next)
152 if (strcmp(l->id, id) == 0)
153 return l;
154
155 snprintf(buf, sizeof(buf), LIBDIR "/ip/link_%s.so", id);
156 dlh = dlopen(buf, RTLD_LAZY);
157 if (dlh == NULL) {
158 /* look in current binary, only open once */
159 dlh = BODY;
160 if (dlh == NULL) {
161 dlh = BODY = dlopen(NULL, RTLD_LAZY);
162 if (dlh == NULL)
163 return NULL;
164 }
165 }
166
167 snprintf(buf, sizeof(buf), "%s_link_util", id);
168 l = dlsym(dlh, buf);
169 if (l == NULL)
170 return NULL;
171
172 l->next = linkutil_list;
173 linkutil_list = l;
174 return l;
175 }
176
177 static int get_link_mode(const char *mode)
178 {
179 if (strcasecmp(mode, "default") == 0)
180 return IF_LINK_MODE_DEFAULT;
181 if (strcasecmp(mode, "dormant") == 0)
182 return IF_LINK_MODE_DORMANT;
183 return -1;
184 }
185
186 static int get_addr_gen_mode(const char *mode)
187 {
188 if (strcasecmp(mode, "eui64") == 0)
189 return IN6_ADDR_GEN_MODE_EUI64;
190 if (strcasecmp(mode, "none") == 0)
191 return IN6_ADDR_GEN_MODE_NONE;
192 if (strcasecmp(mode, "stable_secret") == 0)
193 return IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
194 if (strcasecmp(mode, "random") == 0)
195 return IN6_ADDR_GEN_MODE_RANDOM;
196 return -1;
197 }
198
199 #if IPLINK_IOCTL_COMPAT
200 static int have_rtnl_newlink = -1;
201
202 static int accept_msg(const struct sockaddr_nl *who,
203 struct rtnl_ctrl_data *ctrl,
204 struct nlmsghdr *n, void *arg)
205 {
206 struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n);
207
208 if (n->nlmsg_type == NLMSG_ERROR &&
209 (err->error == -EOPNOTSUPP || err->error == -EINVAL))
210 have_rtnl_newlink = 0;
211 else
212 have_rtnl_newlink = 1;
213 return -1;
214 }
215
216 static int iplink_have_newlink(void)
217 {
218 struct {
219 struct nlmsghdr n;
220 struct ifinfomsg i;
221 char buf[1024];
222 } req = {
223 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
224 .n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
225 .n.nlmsg_type = RTM_NEWLINK,
226 .i.ifi_family = AF_UNSPEC,
227 };
228
229 if (have_rtnl_newlink < 0) {
230 if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) {
231 perror("request send failed");
232 exit(1);
233 }
234 rtnl_listen(&rth, accept_msg, NULL);
235 }
236 return have_rtnl_newlink;
237 }
238 #else /* IPLINK_IOCTL_COMPAT */
239 static int iplink_have_newlink(void)
240 {
241 return 1;
242 }
243 #endif /* ! IPLINK_IOCTL_COMPAT */
244
245 static int nl_get_ll_addr_len(unsigned int dev_index)
246 {
247 int len;
248 struct iplink_req req = {
249 .n = {
250 .nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
251 .nlmsg_type = RTM_GETLINK,
252 .nlmsg_flags = NLM_F_REQUEST
253 },
254 .i = {
255 .ifi_family = preferred_family,
256 .ifi_index = dev_index,
257 }
258 };
259 struct nlmsghdr *answer;
260 struct rtattr *tb[IFLA_MAX+1];
261
262 if (rtnl_talk(&rth, &req.n, &answer) < 0)
263 return -1;
264
265 len = answer->nlmsg_len - NLMSG_LENGTH(sizeof(struct ifinfomsg));
266 if (len < 0) {
267 free(answer);
268 return -1;
269 }
270
271 parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)),
272 len, NLA_F_NESTED);
273 if (!tb[IFLA_ADDRESS]) {
274 free(answer);
275 return -1;
276 }
277
278 free(answer);
279 return RTA_PAYLOAD(tb[IFLA_ADDRESS]);
280 }
281
282 static void iplink_parse_vf_vlan_info(int vf, int *argcp, char ***argvp,
283 struct ifla_vf_vlan_info *ivvip)
284 {
285 int argc = *argcp;
286 char **argv = *argvp;
287 unsigned int vci;
288
289 NEXT_ARG();
290 if (get_unsigned(&vci, *argv, 0) || vci > 4095)
291 invarg("Invalid \"vlan\" value\n", *argv);
292
293 ivvip->vlan = vci;
294 ivvip->vf = vf;
295 ivvip->qos = 0;
296 ivvip->vlan_proto = htons(ETH_P_8021Q);
297 if (NEXT_ARG_OK()) {
298 NEXT_ARG();
299 if (matches(*argv, "qos") == 0) {
300 NEXT_ARG();
301 if (get_unsigned(&ivvip->qos, *argv, 0))
302 invarg("Invalid \"qos\" value\n", *argv);
303 } else {
304 /* rewind arg */
305 PREV_ARG();
306 }
307 }
308 if (NEXT_ARG_OK()) {
309 NEXT_ARG();
310 if (matches(*argv, "proto") == 0) {
311 NEXT_ARG();
312 if (ll_proto_a2n(&ivvip->vlan_proto, *argv))
313 invarg("protocol is invalid\n", *argv);
314 if (ivvip->vlan_proto != htons(ETH_P_8021AD) &&
315 ivvip->vlan_proto != htons(ETH_P_8021Q)) {
316 SPRINT_BUF(b1);
317 SPRINT_BUF(b2);
318 char msg[64 + sizeof(b1) + sizeof(b2)];
319
320 sprintf(msg,
321 "Invalid \"vlan protocol\" value - supported %s, %s\n",
322 ll_proto_n2a(htons(ETH_P_8021Q),
323 b1, sizeof(b1)),
324 ll_proto_n2a(htons(ETH_P_8021AD),
325 b2, sizeof(b2)));
326 invarg(msg, *argv);
327 }
328 } else {
329 /* rewind arg */
330 PREV_ARG();
331 }
332 }
333
334 *argcp = argc;
335 *argvp = argv;
336 }
337
338 static int iplink_parse_vf(int vf, int *argcp, char ***argvp,
339 struct iplink_req *req, int dev_index)
340 {
341 char new_rate_api = 0, count = 0, override_legacy_rate = 0;
342 struct ifla_vf_rate tivt;
343 int len, argc = *argcp;
344 char **argv = *argvp;
345 struct rtattr *vfinfo;
346
347 tivt.min_tx_rate = -1;
348 tivt.max_tx_rate = -1;
349
350 vfinfo = addattr_nest(&req->n, sizeof(*req), IFLA_VF_INFO);
351
352 while (NEXT_ARG_OK()) {
353 NEXT_ARG();
354 count++;
355 if (!matches(*argv, "max_tx_rate")) {
356 /* new API in use */
357 new_rate_api = 1;
358 /* override legacy rate */
359 override_legacy_rate = 1;
360 } else if (!matches(*argv, "min_tx_rate")) {
361 /* new API in use */
362 new_rate_api = 1;
363 }
364 }
365
366 while (count--) {
367 /* rewind arg */
368 PREV_ARG();
369 }
370
371 while (NEXT_ARG_OK()) {
372 NEXT_ARG();
373 if (matches(*argv, "mac") == 0) {
374 struct ifla_vf_mac ivm = { 0 };
375 int halen = nl_get_ll_addr_len(dev_index);
376
377 NEXT_ARG();
378 ivm.vf = vf;
379 len = ll_addr_a2n((char *)ivm.mac, 32, *argv);
380 if (len < 0)
381 return -1;
382 if (halen > 0 && len != halen) {
383 fprintf(stderr,
384 "Invalid address length %d - must be %d bytes\n",
385 len, halen);
386 return -1;
387 }
388 addattr_l(&req->n, sizeof(*req), IFLA_VF_MAC,
389 &ivm, sizeof(ivm));
390 } else if (matches(*argv, "vlan") == 0) {
391 struct ifla_vf_vlan_info ivvi;
392
393 iplink_parse_vf_vlan_info(vf, &argc, &argv, &ivvi);
394 /* support the old interface in case of older kernel*/
395 if (ivvi.vlan_proto == htons(ETH_P_8021Q)) {
396 struct ifla_vf_vlan ivv;
397
398 ivv.vf = ivvi.vf;
399 ivv.vlan = ivvi.vlan;
400 ivv.qos = ivvi.qos;
401 addattr_l(&req->n, sizeof(*req),
402 IFLA_VF_VLAN, &ivv, sizeof(ivv));
403 } else {
404 struct rtattr *vfvlanlist;
405
406 vfvlanlist = addattr_nest(&req->n, sizeof(*req),
407 IFLA_VF_VLAN_LIST);
408 addattr_l(&req->n, sizeof(*req),
409 IFLA_VF_VLAN_INFO, &ivvi,
410 sizeof(ivvi));
411
412 while (NEXT_ARG_OK()) {
413 NEXT_ARG();
414 if (matches(*argv, "vlan") != 0) {
415 PREV_ARG();
416 break;
417 }
418 iplink_parse_vf_vlan_info(vf, &argc,
419 &argv, &ivvi);
420 addattr_l(&req->n, sizeof(*req),
421 IFLA_VF_VLAN_INFO, &ivvi,
422 sizeof(ivvi));
423 }
424 addattr_nest_end(&req->n, vfvlanlist);
425 }
426 } else if (matches(*argv, "rate") == 0) {
427 struct ifla_vf_tx_rate ivt;
428
429 NEXT_ARG();
430 if (get_unsigned(&ivt.rate, *argv, 0))
431 invarg("Invalid \"rate\" value\n", *argv);
432
433 ivt.vf = vf;
434 if (!new_rate_api)
435 addattr_l(&req->n, sizeof(*req),
436 IFLA_VF_TX_RATE, &ivt, sizeof(ivt));
437 else if (!override_legacy_rate)
438 tivt.max_tx_rate = ivt.rate;
439
440 } else if (matches(*argv, "max_tx_rate") == 0) {
441 NEXT_ARG();
442 if (get_unsigned(&tivt.max_tx_rate, *argv, 0))
443 invarg("Invalid \"max tx rate\" value\n",
444 *argv);
445 tivt.vf = vf;
446
447 } else if (matches(*argv, "min_tx_rate") == 0) {
448 NEXT_ARG();
449 if (get_unsigned(&tivt.min_tx_rate, *argv, 0))
450 invarg("Invalid \"min tx rate\" value\n",
451 *argv);
452 tivt.vf = vf;
453
454 } else if (matches(*argv, "spoofchk") == 0) {
455 struct ifla_vf_spoofchk ivs;
456
457 NEXT_ARG();
458 if (matches(*argv, "on") == 0)
459 ivs.setting = 1;
460 else if (matches(*argv, "off") == 0)
461 ivs.setting = 0;
462 else
463 return on_off("spoofchk", *argv);
464 ivs.vf = vf;
465 addattr_l(&req->n, sizeof(*req), IFLA_VF_SPOOFCHK,
466 &ivs, sizeof(ivs));
467
468 } else if (matches(*argv, "query_rss") == 0) {
469 struct ifla_vf_rss_query_en ivs;
470
471 NEXT_ARG();
472 if (matches(*argv, "on") == 0)
473 ivs.setting = 1;
474 else if (matches(*argv, "off") == 0)
475 ivs.setting = 0;
476 else
477 return on_off("query_rss", *argv);
478 ivs.vf = vf;
479 addattr_l(&req->n, sizeof(*req), IFLA_VF_RSS_QUERY_EN,
480 &ivs, sizeof(ivs));
481
482 } else if (matches(*argv, "trust") == 0) {
483 struct ifla_vf_trust ivt;
484
485 NEXT_ARG();
486 if (matches(*argv, "on") == 0)
487 ivt.setting = 1;
488 else if (matches(*argv, "off") == 0)
489 ivt.setting = 0;
490 else
491 invarg("Invalid \"trust\" value\n", *argv);
492 ivt.vf = vf;
493 addattr_l(&req->n, sizeof(*req), IFLA_VF_TRUST,
494 &ivt, sizeof(ivt));
495
496 } else if (matches(*argv, "state") == 0) {
497 struct ifla_vf_link_state ivl;
498
499 NEXT_ARG();
500 if (matches(*argv, "auto") == 0)
501 ivl.link_state = IFLA_VF_LINK_STATE_AUTO;
502 else if (matches(*argv, "enable") == 0)
503 ivl.link_state = IFLA_VF_LINK_STATE_ENABLE;
504 else if (matches(*argv, "disable") == 0)
505 ivl.link_state = IFLA_VF_LINK_STATE_DISABLE;
506 else
507 invarg("Invalid \"state\" value\n", *argv);
508 ivl.vf = vf;
509 addattr_l(&req->n, sizeof(*req), IFLA_VF_LINK_STATE,
510 &ivl, sizeof(ivl));
511 } else if (matches(*argv, "node_guid") == 0) {
512 struct ifla_vf_guid ivg;
513
514 NEXT_ARG();
515 ivg.vf = vf;
516 if (get_guid(&ivg.guid, *argv)) {
517 invarg("Invalid GUID format\n", *argv);
518 return -1;
519 }
520 addattr_l(&req->n, sizeof(*req), IFLA_VF_IB_NODE_GUID,
521 &ivg, sizeof(ivg));
522 } else if (matches(*argv, "port_guid") == 0) {
523 struct ifla_vf_guid ivg;
524
525 NEXT_ARG();
526 ivg.vf = vf;
527 if (get_guid(&ivg.guid, *argv)) {
528 invarg("Invalid GUID format\n", *argv);
529 return -1;
530 }
531 addattr_l(&req->n, sizeof(*req), IFLA_VF_IB_PORT_GUID,
532 &ivg, sizeof(ivg));
533 } else {
534 /* rewind arg */
535 PREV_ARG();
536 break;
537 }
538 }
539
540 if (new_rate_api) {
541 int tmin, tmax;
542
543 if (tivt.min_tx_rate == -1 || tivt.max_tx_rate == -1) {
544 ipaddr_get_vf_rate(tivt.vf, &tmin, &tmax, dev_index);
545 if (tivt.min_tx_rate == -1)
546 tivt.min_tx_rate = tmin;
547 if (tivt.max_tx_rate == -1)
548 tivt.max_tx_rate = tmax;
549 }
550
551 if (tivt.max_tx_rate && tivt.min_tx_rate > tivt.max_tx_rate) {
552 fprintf(stderr,
553 "Invalid min_tx_rate %d - must be <= max_tx_rate %d\n",
554 tivt.min_tx_rate, tivt.max_tx_rate);
555 return -1;
556 }
557
558 addattr_l(&req->n, sizeof(*req), IFLA_VF_RATE, &tivt,
559 sizeof(tivt));
560 }
561
562 if (argc == *argcp)
563 incomplete_command();
564
565 addattr_nest_end(&req->n, vfinfo);
566
567 *argcp = argc;
568 *argvp = argv;
569 return 0;
570 }
571
572 int iplink_parse(int argc, char **argv, struct iplink_req *req,
573 char **name, char **type, char **link, char **dev,
574 int *group, int *index)
575 {
576 int ret, len;
577 char abuf[32];
578 int qlen = -1;
579 int mtu = -1;
580 int netns = -1;
581 int vf = -1;
582 int numtxqueues = -1;
583 int numrxqueues = -1;
584 int dev_index = 0;
585 int link_netnsid = -1;
586 int addr_len = 0;
587
588 *group = -1;
589 ret = argc;
590
591 while (argc > 0) {
592 if (strcmp(*argv, "up") == 0) {
593 req->i.ifi_change |= IFF_UP;
594 req->i.ifi_flags |= IFF_UP;
595 } else if (strcmp(*argv, "down") == 0) {
596 req->i.ifi_change |= IFF_UP;
597 req->i.ifi_flags &= ~IFF_UP;
598 } else if (strcmp(*argv, "name") == 0) {
599 NEXT_ARG();
600 if (check_ifname(*argv))
601 invarg("\"name\" not a valid ifname", *argv);
602 *name = *argv;
603 } else if (strcmp(*argv, "index") == 0) {
604 NEXT_ARG();
605 if (*index)
606 duparg("index", *argv);
607 *index = atoi(*argv);
608 if (*index <= 0)
609 invarg("Invalid \"index\" value", *argv);
610 } else if (matches(*argv, "link") == 0) {
611 NEXT_ARG();
612 *link = *argv;
613 } else if (matches(*argv, "address") == 0) {
614 NEXT_ARG();
615 addr_len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
616 if (addr_len < 0)
617 return -1;
618 addattr_l(&req->n, sizeof(*req),
619 IFLA_ADDRESS, abuf, addr_len);
620 } else if (matches(*argv, "broadcast") == 0 ||
621 strcmp(*argv, "brd") == 0) {
622 NEXT_ARG();
623 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
624 if (len < 0)
625 return -1;
626 addattr_l(&req->n, sizeof(*req),
627 IFLA_BROADCAST, abuf, len);
628 } else if (matches(*argv, "txqueuelen") == 0 ||
629 strcmp(*argv, "qlen") == 0 ||
630 matches(*argv, "txqlen") == 0) {
631 NEXT_ARG();
632 if (qlen != -1)
633 duparg("txqueuelen", *argv);
634 if (get_integer(&qlen, *argv, 0))
635 invarg("Invalid \"txqueuelen\" value\n", *argv);
636 addattr_l(&req->n, sizeof(*req),
637 IFLA_TXQLEN, &qlen, 4);
638 } else if (strcmp(*argv, "mtu") == 0) {
639 NEXT_ARG();
640 if (mtu != -1)
641 duparg("mtu", *argv);
642 if (get_integer(&mtu, *argv, 0))
643 invarg("Invalid \"mtu\" value\n", *argv);
644 addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4);
645 } else if (strcmp(*argv, "xdpgeneric") == 0 ||
646 strcmp(*argv, "xdpdrv") == 0 ||
647 strcmp(*argv, "xdpoffload") == 0 ||
648 strcmp(*argv, "xdp") == 0) {
649 bool generic = strcmp(*argv, "xdpgeneric") == 0;
650 bool drv = strcmp(*argv, "xdpdrv") == 0;
651 bool offload = strcmp(*argv, "xdpoffload") == 0;
652
653 NEXT_ARG();
654 if (xdp_parse(&argc, &argv, req, dev_index,
655 generic, drv, offload))
656 exit(-1);
657 } else if (strcmp(*argv, "netns") == 0) {
658 NEXT_ARG();
659 if (netns != -1)
660 duparg("netns", *argv);
661 netns = netns_get_fd(*argv);
662 if (netns >= 0)
663 addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_FD,
664 &netns, 4);
665 else if (get_integer(&netns, *argv, 0) == 0)
666 addattr_l(&req->n, sizeof(*req),
667 IFLA_NET_NS_PID, &netns, 4);
668 else
669 invarg("Invalid \"netns\" value\n", *argv);
670 } else if (strcmp(*argv, "multicast") == 0) {
671 NEXT_ARG();
672 req->i.ifi_change |= IFF_MULTICAST;
673
674 if (strcmp(*argv, "on") == 0)
675 req->i.ifi_flags |= IFF_MULTICAST;
676 else if (strcmp(*argv, "off") == 0)
677 req->i.ifi_flags &= ~IFF_MULTICAST;
678 else
679 return on_off("multicast", *argv);
680 } else if (strcmp(*argv, "allmulticast") == 0) {
681 NEXT_ARG();
682 req->i.ifi_change |= IFF_ALLMULTI;
683
684 if (strcmp(*argv, "on") == 0)
685 req->i.ifi_flags |= IFF_ALLMULTI;
686 else if (strcmp(*argv, "off") == 0)
687 req->i.ifi_flags &= ~IFF_ALLMULTI;
688 else
689 return on_off("allmulticast", *argv);
690 } else if (strcmp(*argv, "promisc") == 0) {
691 NEXT_ARG();
692 req->i.ifi_change |= IFF_PROMISC;
693
694 if (strcmp(*argv, "on") == 0)
695 req->i.ifi_flags |= IFF_PROMISC;
696 else if (strcmp(*argv, "off") == 0)
697 req->i.ifi_flags &= ~IFF_PROMISC;
698 else
699 return on_off("promisc", *argv);
700 } else if (strcmp(*argv, "trailers") == 0) {
701 NEXT_ARG();
702 req->i.ifi_change |= IFF_NOTRAILERS;
703
704 if (strcmp(*argv, "off") == 0)
705 req->i.ifi_flags |= IFF_NOTRAILERS;
706 else if (strcmp(*argv, "on") == 0)
707 req->i.ifi_flags &= ~IFF_NOTRAILERS;
708 else
709 return on_off("trailers", *argv);
710 } else if (strcmp(*argv, "arp") == 0) {
711 NEXT_ARG();
712 req->i.ifi_change |= IFF_NOARP;
713
714 if (strcmp(*argv, "on") == 0)
715 req->i.ifi_flags &= ~IFF_NOARP;
716 else if (strcmp(*argv, "off") == 0)
717 req->i.ifi_flags |= IFF_NOARP;
718 else
719 return on_off("arp", *argv);
720 } else if (strcmp(*argv, "carrier") == 0) {
721 int carrier;
722
723 NEXT_ARG();
724 if (strcmp(*argv, "on") == 0)
725 carrier = 1;
726 else if (strcmp(*argv, "off") == 0)
727 carrier = 0;
728 else
729 return on_off("carrier", *argv);
730
731 addattr8(&req->n, sizeof(*req), IFLA_CARRIER, carrier);
732 } else if (strcmp(*argv, "vf") == 0) {
733 struct rtattr *vflist;
734
735 NEXT_ARG();
736 if (get_integer(&vf, *argv, 0))
737 invarg("Invalid \"vf\" value\n", *argv);
738
739 vflist = addattr_nest(&req->n, sizeof(*req),
740 IFLA_VFINFO_LIST);
741 if (dev_index == 0)
742 missarg("dev");
743
744 len = iplink_parse_vf(vf, &argc, &argv, req, dev_index);
745 if (len < 0)
746 return -1;
747 addattr_nest_end(&req->n, vflist);
748 } else if (matches(*argv, "master") == 0) {
749 int ifindex;
750
751 NEXT_ARG();
752 ifindex = ll_name_to_index(*argv);
753 if (!ifindex)
754 invarg("Device does not exist\n", *argv);
755 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
756 &ifindex, 4);
757 } else if (strcmp(*argv, "vrf") == 0) {
758 int ifindex;
759
760 NEXT_ARG();
761 ifindex = ll_name_to_index(*argv);
762 if (!ifindex)
763 invarg("Not a valid VRF name\n", *argv);
764 if (!name_is_vrf(*argv))
765 invarg("Not a valid VRF name\n", *argv);
766 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
767 &ifindex, sizeof(ifindex));
768 } else if (matches(*argv, "nomaster") == 0) {
769 int ifindex = 0;
770
771 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
772 &ifindex, 4);
773 } else if (matches(*argv, "dynamic") == 0) {
774 NEXT_ARG();
775 req->i.ifi_change |= IFF_DYNAMIC;
776
777 if (strcmp(*argv, "on") == 0)
778 req->i.ifi_flags |= IFF_DYNAMIC;
779 else if (strcmp(*argv, "off") == 0)
780 req->i.ifi_flags &= ~IFF_DYNAMIC;
781 else
782 return on_off("dynamic", *argv);
783 } else if (matches(*argv, "type") == 0) {
784 NEXT_ARG();
785 *type = *argv;
786 argc--; argv++;
787 break;
788 } else if (matches(*argv, "alias") == 0) {
789 NEXT_ARG();
790 len = strlen(*argv);
791 if (len >= IFALIASZ)
792 invarg("alias too long\n", *argv);
793 addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
794 *argv, len);
795 } else if (strcmp(*argv, "group") == 0) {
796 NEXT_ARG();
797 if (*group != -1)
798 duparg("group", *argv);
799 if (rtnl_group_a2n(group, *argv))
800 invarg("Invalid \"group\" value\n", *argv);
801 } else if (strcmp(*argv, "mode") == 0) {
802 int mode;
803
804 NEXT_ARG();
805 mode = get_link_mode(*argv);
806 if (mode < 0)
807 invarg("Invalid link mode\n", *argv);
808 addattr8(&req->n, sizeof(*req), IFLA_LINKMODE, mode);
809 } else if (strcmp(*argv, "state") == 0) {
810 int state;
811
812 NEXT_ARG();
813 state = get_operstate(*argv);
814 if (state < 0)
815 invarg("Invalid operstate\n", *argv);
816
817 addattr8(&req->n, sizeof(*req), IFLA_OPERSTATE, state);
818 } else if (matches(*argv, "numtxqueues") == 0) {
819 NEXT_ARG();
820 if (numtxqueues != -1)
821 duparg("numtxqueues", *argv);
822 if (get_integer(&numtxqueues, *argv, 0))
823 invarg("Invalid \"numtxqueues\" value\n",
824 *argv);
825 addattr_l(&req->n, sizeof(*req), IFLA_NUM_TX_QUEUES,
826 &numtxqueues, 4);
827 } else if (matches(*argv, "numrxqueues") == 0) {
828 NEXT_ARG();
829 if (numrxqueues != -1)
830 duparg("numrxqueues", *argv);
831 if (get_integer(&numrxqueues, *argv, 0))
832 invarg("Invalid \"numrxqueues\" value\n",
833 *argv);
834 addattr_l(&req->n, sizeof(*req), IFLA_NUM_RX_QUEUES,
835 &numrxqueues, 4);
836 } else if (matches(*argv, "addrgenmode") == 0) {
837 struct rtattr *afs, *afs6;
838 int mode;
839
840 NEXT_ARG();
841 mode = get_addr_gen_mode(*argv);
842 if (mode < 0)
843 invarg("Invalid address generation mode\n",
844 *argv);
845 afs = addattr_nest(&req->n, sizeof(*req), IFLA_AF_SPEC);
846 afs6 = addattr_nest(&req->n, sizeof(*req), AF_INET6);
847 addattr8(&req->n, sizeof(*req),
848 IFLA_INET6_ADDR_GEN_MODE, mode);
849 addattr_nest_end(&req->n, afs6);
850 addattr_nest_end(&req->n, afs);
851 } else if (matches(*argv, "link-netnsid") == 0) {
852 NEXT_ARG();
853 if (link_netnsid != -1)
854 duparg("link-netnsid", *argv);
855 if (get_integer(&link_netnsid, *argv, 0))
856 invarg("Invalid \"link-netnsid\" value\n",
857 *argv);
858 addattr32(&req->n, sizeof(*req), IFLA_LINK_NETNSID,
859 link_netnsid);
860 } else if (strcmp(*argv, "protodown") == 0) {
861 unsigned int proto_down;
862
863 NEXT_ARG();
864 if (strcmp(*argv, "on") == 0)
865 proto_down = 1;
866 else if (strcmp(*argv, "off") == 0)
867 proto_down = 0;
868 else
869 return on_off("protodown", *argv);
870 addattr8(&req->n, sizeof(*req), IFLA_PROTO_DOWN,
871 proto_down);
872 } else if (strcmp(*argv, "gso_max_size") == 0) {
873 unsigned int max_size;
874
875 NEXT_ARG();
876 if (get_unsigned(&max_size, *argv, 0) ||
877 max_size > GSO_MAX_SIZE)
878 invarg("Invalid \"gso_max_size\" value\n",
879 *argv);
880 addattr32(&req->n, sizeof(*req),
881 IFLA_GSO_MAX_SIZE, max_size);
882 } else if (strcmp(*argv, "gso_max_segs") == 0) {
883 unsigned int max_segs;
884
885 NEXT_ARG();
886 if (get_unsigned(&max_segs, *argv, 0) ||
887 max_segs > GSO_MAX_SEGS)
888 invarg("Invalid \"gso_max_segs\" value\n",
889 *argv);
890 addattr32(&req->n, sizeof(*req),
891 IFLA_GSO_MAX_SEGS, max_segs);
892 } else {
893 if (matches(*argv, "help") == 0)
894 usage();
895
896 if (strcmp(*argv, "dev") == 0)
897 NEXT_ARG();
898 if (*dev)
899 duparg2("dev", *argv);
900 if (check_ifname(*argv))
901 invarg("\"dev\" not a valid ifname", *argv);
902 *dev = *argv;
903 dev_index = ll_name_to_index(*dev);
904 }
905 argc--; argv++;
906 }
907
908 if (dev_index && addr_len) {
909 int halen = nl_get_ll_addr_len(dev_index);
910
911 if (halen >= 0 && halen != addr_len) {
912 fprintf(stderr,
913 "Invalid address length %d - must be %d bytes\n",
914 addr_len, halen);
915 return -1;
916 }
917 }
918
919 return ret - argc;
920 }
921
922 static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
923 {
924 char *dev = NULL;
925 char *name = NULL;
926 char *link = NULL;
927 char *type = NULL;
928 int index = 0;
929 int group;
930 struct link_util *lu = NULL;
931 struct iplink_req req = {
932 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
933 .n.nlmsg_flags = NLM_F_REQUEST | flags,
934 .n.nlmsg_type = cmd,
935 .i.ifi_family = preferred_family,
936 };
937 int ret;
938
939 ret = iplink_parse(argc, argv,
940 &req, &name, &type, &link, &dev, &group, &index);
941 if (ret < 0)
942 return ret;
943
944 argc -= ret;
945 argv += ret;
946
947 if (group != -1) {
948 if (dev)
949 addattr_l(&req.n, sizeof(req), IFLA_GROUP,
950 &group, sizeof(group));
951 else {
952 if (argc) {
953 fprintf(stderr,
954 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
955 *argv);
956 return -1;
957 }
958 if (flags & NLM_F_CREATE) {
959 fprintf(stderr,
960 "group cannot be used when creating devices.\n");
961 return -1;
962 }
963
964 addattr32(&req.n, sizeof(req), IFLA_GROUP, group);
965 if (rtnl_talk(&rth, &req.n, NULL) < 0)
966 return -2;
967 return 0;
968 }
969 }
970
971 if (!(flags & NLM_F_CREATE)) {
972 if (!dev) {
973 fprintf(stderr,
974 "Not enough information: \"dev\" argument is required.\n");
975 exit(-1);
976 }
977 if (cmd == RTM_NEWLINK && index) {
978 fprintf(stderr,
979 "index can be used only when creating devices.\n");
980 exit(-1);
981 }
982
983 req.i.ifi_index = ll_name_to_index(dev);
984 if (req.i.ifi_index == 0) {
985 fprintf(stderr, "Cannot find device \"%s\"\n", dev);
986 return -1;
987 }
988 } else {
989 /* Allow "ip link add dev" and "ip link add name" */
990 if (!name)
991 name = dev;
992
993 if (link) {
994 int ifindex;
995
996 ifindex = ll_name_to_index(link);
997 if (ifindex == 0) {
998 fprintf(stderr, "Cannot find device \"%s\"\n",
999 link);
1000 return -1;
1001 }
1002 addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4);
1003 }
1004
1005 req.i.ifi_index = index;
1006 }
1007
1008 if (name) {
1009 addattr_l(&req.n, sizeof(req),
1010 IFLA_IFNAME, name, strlen(name) + 1);
1011 }
1012
1013 if (type) {
1014 struct rtattr *linkinfo;
1015 char *ulinep = strchr(type, '_');
1016 int iflatype;
1017
1018 linkinfo = addattr_nest(&req.n, sizeof(req), IFLA_LINKINFO);
1019 addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
1020 strlen(type));
1021
1022 lu = get_link_kind(type);
1023 if (ulinep && !strcmp(ulinep, "_slave"))
1024 iflatype = IFLA_INFO_SLAVE_DATA;
1025 else
1026 iflatype = IFLA_INFO_DATA;
1027 if (lu && argc) {
1028 struct rtattr *data;
1029
1030 data = addattr_nest(&req.n, sizeof(req), iflatype);
1031
1032 if (lu->parse_opt &&
1033 lu->parse_opt(lu, argc, argv, &req.n))
1034 return -1;
1035
1036 addattr_nest_end(&req.n, data);
1037 } else if (argc) {
1038 if (matches(*argv, "help") == 0)
1039 usage();
1040 fprintf(stderr,
1041 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
1042 *argv);
1043 return -1;
1044 }
1045 addattr_nest_end(&req.n, linkinfo);
1046 } else if (flags & NLM_F_CREATE) {
1047 fprintf(stderr,
1048 "Not enough information: \"type\" argument is required\n");
1049 return -1;
1050 }
1051
1052 if (rtnl_talk(&rth, &req.n, NULL) < 0)
1053 return -2;
1054
1055 return 0;
1056 }
1057
1058 int iplink_get(unsigned int flags, char *name, __u32 filt_mask)
1059 {
1060 struct iplink_req req = {
1061 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
1062 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1063 .n.nlmsg_type = RTM_GETLINK,
1064 .i.ifi_family = preferred_family,
1065 };
1066 struct nlmsghdr *answer;
1067
1068 if (name) {
1069 addattr_l(&req.n, sizeof(req),
1070 IFLA_IFNAME, name, strlen(name) + 1);
1071 }
1072 addattr32(&req.n, sizeof(req), IFLA_EXT_MASK, filt_mask);
1073
1074 if (rtnl_talk(&rth, &req.n, &answer) < 0)
1075 return -2;
1076
1077 open_json_object(NULL);
1078 print_linkinfo(NULL, answer, stdout);
1079 close_json_object();
1080
1081 free(answer);
1082 return 0;
1083 }
1084
1085 #if IPLINK_IOCTL_COMPAT
1086 static int get_ctl_fd(void)
1087 {
1088 int s_errno;
1089 int fd;
1090
1091 fd = socket(PF_INET, SOCK_DGRAM, 0);
1092 if (fd >= 0)
1093 return fd;
1094 s_errno = errno;
1095 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
1096 if (fd >= 0)
1097 return fd;
1098 fd = socket(PF_INET6, SOCK_DGRAM, 0);
1099 if (fd >= 0)
1100 return fd;
1101 errno = s_errno;
1102 perror("Cannot create control socket");
1103 return -1;
1104 }
1105
1106 static int do_chflags(const char *dev, __u32 flags, __u32 mask)
1107 {
1108 struct ifreq ifr;
1109 int fd;
1110 int err;
1111
1112 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1113 fd = get_ctl_fd();
1114 if (fd < 0)
1115 return -1;
1116 err = ioctl(fd, SIOCGIFFLAGS, &ifr);
1117 if (err) {
1118 perror("SIOCGIFFLAGS");
1119 close(fd);
1120 return -1;
1121 }
1122 if ((ifr.ifr_flags^flags)&mask) {
1123 ifr.ifr_flags &= ~mask;
1124 ifr.ifr_flags |= mask&flags;
1125 err = ioctl(fd, SIOCSIFFLAGS, &ifr);
1126 if (err)
1127 perror("SIOCSIFFLAGS");
1128 }
1129 close(fd);
1130 return err;
1131 }
1132
1133 static int do_changename(const char *dev, const char *newdev)
1134 {
1135 struct ifreq ifr;
1136 int fd;
1137 int err;
1138
1139 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1140 strncpy(ifr.ifr_newname, newdev, IFNAMSIZ);
1141 fd = get_ctl_fd();
1142 if (fd < 0)
1143 return -1;
1144 err = ioctl(fd, SIOCSIFNAME, &ifr);
1145 if (err) {
1146 perror("SIOCSIFNAME");
1147 close(fd);
1148 return -1;
1149 }
1150 close(fd);
1151 return err;
1152 }
1153
1154 static int set_qlen(const char *dev, int qlen)
1155 {
1156 struct ifreq ifr = { .ifr_qlen = qlen };
1157 int s;
1158
1159 s = get_ctl_fd();
1160 if (s < 0)
1161 return -1;
1162
1163 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1164 if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
1165 perror("SIOCSIFXQLEN");
1166 close(s);
1167 return -1;
1168 }
1169 close(s);
1170
1171 return 0;
1172 }
1173
1174 static int set_mtu(const char *dev, int mtu)
1175 {
1176 struct ifreq ifr = { .ifr_mtu = mtu };
1177 int s;
1178
1179 s = get_ctl_fd();
1180 if (s < 0)
1181 return -1;
1182
1183 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1184 if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
1185 perror("SIOCSIFMTU");
1186 close(s);
1187 return -1;
1188 }
1189 close(s);
1190
1191 return 0;
1192 }
1193
1194 static int get_address(const char *dev, int *htype)
1195 {
1196 struct ifreq ifr = {};
1197 struct sockaddr_ll me = {
1198 .sll_family = AF_PACKET,
1199 .sll_protocol = htons(ETH_P_LOOP),
1200 };
1201 socklen_t alen;
1202 int s;
1203
1204 s = socket(PF_PACKET, SOCK_DGRAM, 0);
1205 if (s < 0) {
1206 perror("socket(PF_PACKET)");
1207 return -1;
1208 }
1209
1210 strncpy(ifr.ifr_name, dev, IFNAMSIZ);
1211 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
1212 perror("SIOCGIFINDEX");
1213 close(s);
1214 return -1;
1215 }
1216
1217 me.sll_ifindex = ifr.ifr_ifindex;
1218 if (bind(s, (struct sockaddr *)&me, sizeof(me)) == -1) {
1219 perror("bind");
1220 close(s);
1221 return -1;
1222 }
1223
1224 alen = sizeof(me);
1225 if (getsockname(s, (struct sockaddr *)&me, &alen) == -1) {
1226 perror("getsockname");
1227 close(s);
1228 return -1;
1229 }
1230 close(s);
1231 *htype = me.sll_hatype;
1232 return me.sll_halen;
1233 }
1234
1235 static int parse_address(const char *dev, int hatype, int halen,
1236 char *lla, struct ifreq *ifr)
1237 {
1238 int alen;
1239
1240 memset(ifr, 0, sizeof(*ifr));
1241 strncpy(ifr->ifr_name, dev, IFNAMSIZ);
1242 ifr->ifr_hwaddr.sa_family = hatype;
1243 alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
1244 if (alen < 0)
1245 return -1;
1246 if (alen != halen) {
1247 fprintf(stderr,
1248 "Wrong address (%s) length: expected %d bytes\n",
1249 lla, halen);
1250 return -1;
1251 }
1252 return 0;
1253 }
1254
1255 static int set_address(struct ifreq *ifr, int brd)
1256 {
1257 int s;
1258
1259 s = get_ctl_fd();
1260 if (s < 0)
1261 return -1;
1262 if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
1263 perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
1264 close(s);
1265 return -1;
1266 }
1267 close(s);
1268 return 0;
1269 }
1270
1271 static int do_set(int argc, char **argv)
1272 {
1273 char *dev = NULL;
1274 __u32 mask = 0;
1275 __u32 flags = 0;
1276 int qlen = -1;
1277 int mtu = -1;
1278 char *newaddr = NULL;
1279 char *newbrd = NULL;
1280 struct ifreq ifr0, ifr1;
1281 char *newname = NULL;
1282 int htype, halen;
1283
1284 while (argc > 0) {
1285 if (strcmp(*argv, "up") == 0) {
1286 mask |= IFF_UP;
1287 flags |= IFF_UP;
1288 } else if (strcmp(*argv, "down") == 0) {
1289 mask |= IFF_UP;
1290 flags &= ~IFF_UP;
1291 } else if (strcmp(*argv, "name") == 0) {
1292 NEXT_ARG();
1293 if (check_ifname(*argv))
1294 invarg("\"name\" not a valid ifname", *argv);
1295 newname = *argv;
1296 } else if (matches(*argv, "address") == 0) {
1297 NEXT_ARG();
1298 newaddr = *argv;
1299 } else if (matches(*argv, "broadcast") == 0 ||
1300 strcmp(*argv, "brd") == 0) {
1301 NEXT_ARG();
1302 newbrd = *argv;
1303 } else if (matches(*argv, "txqueuelen") == 0 ||
1304 strcmp(*argv, "qlen") == 0 ||
1305 matches(*argv, "txqlen") == 0) {
1306 NEXT_ARG();
1307 if (qlen != -1)
1308 duparg("txqueuelen", *argv);
1309 if (get_integer(&qlen, *argv, 0))
1310 invarg("Invalid \"txqueuelen\" value\n", *argv);
1311 } else if (strcmp(*argv, "mtu") == 0) {
1312 NEXT_ARG();
1313 if (mtu != -1)
1314 duparg("mtu", *argv);
1315 if (get_integer(&mtu, *argv, 0))
1316 invarg("Invalid \"mtu\" value\n", *argv);
1317 } else if (strcmp(*argv, "multicast") == 0) {
1318 NEXT_ARG();
1319 mask |= IFF_MULTICAST;
1320
1321 if (strcmp(*argv, "on") == 0)
1322 flags |= IFF_MULTICAST;
1323 else if (strcmp(*argv, "off") == 0)
1324 flags &= ~IFF_MULTICAST;
1325 else
1326 return on_off("multicast", *argv);
1327 } else if (strcmp(*argv, "allmulticast") == 0) {
1328 NEXT_ARG();
1329 mask |= IFF_ALLMULTI;
1330
1331 if (strcmp(*argv, "on") == 0)
1332 flags |= IFF_ALLMULTI;
1333 else if (strcmp(*argv, "off") == 0)
1334 flags &= ~IFF_ALLMULTI;
1335 else
1336 return on_off("allmulticast", *argv);
1337 } else if (strcmp(*argv, "promisc") == 0) {
1338 NEXT_ARG();
1339 mask |= IFF_PROMISC;
1340
1341 if (strcmp(*argv, "on") == 0)
1342 flags |= IFF_PROMISC;
1343 else if (strcmp(*argv, "off") == 0)
1344 flags &= ~IFF_PROMISC;
1345 else
1346 return on_off("promisc", *argv);
1347 } else if (strcmp(*argv, "trailers") == 0) {
1348 NEXT_ARG();
1349 mask |= IFF_NOTRAILERS;
1350
1351 if (strcmp(*argv, "off") == 0)
1352 flags |= IFF_NOTRAILERS;
1353 else if (strcmp(*argv, "on") == 0)
1354 flags &= ~IFF_NOTRAILERS;
1355 else
1356 return on_off("trailers", *argv);
1357 } else if (strcmp(*argv, "arp") == 0) {
1358 NEXT_ARG();
1359 mask |= IFF_NOARP;
1360
1361 if (strcmp(*argv, "on") == 0)
1362 flags &= ~IFF_NOARP;
1363 else if (strcmp(*argv, "off") == 0)
1364 flags |= IFF_NOARP;
1365 else
1366 return on_off("arp", *argv);
1367 } else if (matches(*argv, "dynamic") == 0) {
1368 NEXT_ARG();
1369 mask |= IFF_DYNAMIC;
1370
1371 if (strcmp(*argv, "on") == 0)
1372 flags |= IFF_DYNAMIC;
1373 else if (strcmp(*argv, "off") == 0)
1374 flags &= ~IFF_DYNAMIC;
1375 else
1376 return on_off("dynamic", *argv);
1377 } else {
1378 if (strcmp(*argv, "dev") == 0)
1379 NEXT_ARG();
1380 else if (matches(*argv, "help") == 0)
1381 usage();
1382
1383 if (dev)
1384 duparg2("dev", *argv);
1385 if (check_ifname(*argv))
1386 invarg("\"dev\" not a valid ifname", *argv);
1387 dev = *argv;
1388 }
1389 argc--; argv++;
1390 }
1391
1392 if (!dev) {
1393 fprintf(stderr,
1394 "Not enough of information: \"dev\" argument is required.\n");
1395 exit(-1);
1396 }
1397
1398 if (newaddr || newbrd) {
1399 halen = get_address(dev, &htype);
1400 if (halen < 0)
1401 return -1;
1402 if (newaddr) {
1403 if (parse_address(dev, htype, halen,
1404 newaddr, &ifr0) < 0)
1405 return -1;
1406 }
1407 if (newbrd) {
1408 if (parse_address(dev, htype, halen,
1409 newbrd, &ifr1) < 0)
1410 return -1;
1411 }
1412 }
1413
1414 if (newname && strcmp(dev, newname)) {
1415 if (do_changename(dev, newname) < 0)
1416 return -1;
1417 dev = newname;
1418 }
1419 if (qlen != -1) {
1420 if (set_qlen(dev, qlen) < 0)
1421 return -1;
1422 }
1423 if (mtu != -1) {
1424 if (set_mtu(dev, mtu) < 0)
1425 return -1;
1426 }
1427 if (newaddr || newbrd) {
1428 if (newbrd) {
1429 if (set_address(&ifr1, 1) < 0)
1430 return -1;
1431 }
1432 if (newaddr) {
1433 if (set_address(&ifr0, 0) < 0)
1434 return -1;
1435 }
1436 }
1437 if (mask)
1438 return do_chflags(dev, flags, mask);
1439 return 0;
1440 }
1441 #endif /* IPLINK_IOCTL_COMPAT */
1442
1443 static void print_mpls_stats(FILE *fp, struct rtattr *attr)
1444 {
1445 struct rtattr *mrtb[MPLS_STATS_MAX+1];
1446 struct mpls_link_stats *stats;
1447
1448 parse_rtattr(mrtb, MPLS_STATS_MAX, RTA_DATA(attr),
1449 RTA_PAYLOAD(attr));
1450 if (!mrtb[MPLS_STATS_LINK])
1451 return;
1452
1453 stats = RTA_DATA(mrtb[MPLS_STATS_LINK]);
1454
1455 fprintf(fp, " mpls:\n");
1456 fprintf(fp, " RX: bytes packets errors dropped noroute\n");
1457 fprintf(fp, " ");
1458 print_num(fp, 10, stats->rx_bytes);
1459 print_num(fp, 8, stats->rx_packets);
1460 print_num(fp, 7, stats->rx_errors);
1461 print_num(fp, 8, stats->rx_dropped);
1462 print_num(fp, 7, stats->rx_noroute);
1463 fprintf(fp, "\n");
1464 fprintf(fp, " TX: bytes packets errors dropped\n");
1465 fprintf(fp, " ");
1466 print_num(fp, 10, stats->tx_bytes);
1467 print_num(fp, 8, stats->tx_packets);
1468 print_num(fp, 7, stats->tx_errors);
1469 print_num(fp, 7, stats->tx_dropped);
1470 fprintf(fp, "\n");
1471 }
1472
1473 static void print_af_stats_attr(FILE *fp, int ifindex, struct rtattr *attr)
1474 {
1475 bool if_printed = false;
1476 struct rtattr *i;
1477 int rem;
1478
1479 rem = RTA_PAYLOAD(attr);
1480 for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
1481 if (preferred_family != AF_UNSPEC &&
1482 i->rta_type != preferred_family)
1483 continue;
1484
1485 if (!if_printed) {
1486 fprintf(fp, "%u: %s\n", ifindex,
1487 ll_index_to_name(ifindex));
1488 if_printed = true;
1489 }
1490
1491 switch (i->rta_type) {
1492 case AF_MPLS:
1493 print_mpls_stats(fp, i);
1494 break;
1495 default:
1496 fprintf(fp, " unknown af(%d)\n", i->rta_type);
1497 break;
1498 }
1499 }
1500 }
1501
1502 struct af_stats_ctx {
1503 FILE *fp;
1504 int ifindex;
1505 };
1506
1507 static int print_af_stats(const struct sockaddr_nl *who,
1508 struct nlmsghdr *n,
1509 void *arg)
1510 {
1511 struct if_stats_msg *ifsm = NLMSG_DATA(n);
1512 struct rtattr *tb[IFLA_STATS_MAX+1];
1513 int len = n->nlmsg_len;
1514 struct af_stats_ctx *ctx = arg;
1515 FILE *fp = ctx->fp;
1516
1517 len -= NLMSG_LENGTH(sizeof(*ifsm));
1518 if (len < 0) {
1519 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
1520 return -1;
1521 }
1522
1523 if (ctx->ifindex && ifsm->ifindex != ctx->ifindex)
1524 return 0;
1525
1526 parse_rtattr(tb, IFLA_STATS_MAX, IFLA_STATS_RTA(ifsm), len);
1527
1528 if (tb[IFLA_STATS_AF_SPEC])
1529 print_af_stats_attr(fp, ifsm->ifindex, tb[IFLA_STATS_AF_SPEC]);
1530
1531 fflush(fp);
1532 return 0;
1533 }
1534
1535 static int iplink_afstats(int argc, char **argv)
1536 {
1537 __u32 filt_mask = IFLA_STATS_FILTER_BIT(IFLA_STATS_AF_SPEC);
1538 const char *filter_dev = NULL;
1539 struct af_stats_ctx ctx = {
1540 .fp = stdout,
1541 .ifindex = 0,
1542 };
1543
1544 while (argc > 0) {
1545 if (strcmp(*argv, "dev") == 0) {
1546 NEXT_ARG();
1547 if (filter_dev)
1548 duparg2("dev", *argv);
1549 filter_dev = *argv;
1550 } else if (matches(*argv, "help") == 0) {
1551 usage();
1552 } else {
1553 fprintf(stderr,
1554 "Command \"%s\" is unknown, try \"ip link help\".\n",
1555 *argv);
1556 exit(-1);
1557 }
1558
1559 argv++; argc--;
1560 }
1561
1562 if (filter_dev) {
1563 ctx.ifindex = ll_name_to_index(filter_dev);
1564 if (ctx.ifindex <= 0) {
1565 fprintf(stderr,
1566 "Device \"%s\" does not exist.\n",
1567 filter_dev);
1568 return -1;
1569 }
1570 }
1571
1572 if (rtnl_wilddump_stats_req_filter(&rth, AF_UNSPEC,
1573 RTM_GETSTATS,
1574 filt_mask) < 0) {
1575 perror("Cannont send dump request");
1576 return 1;
1577 }
1578
1579 if (rtnl_dump_filter(&rth, print_af_stats, &ctx) < 0) {
1580 fprintf(stderr, "Dump terminated\n");
1581 return 1;
1582 }
1583
1584 return 0;
1585 }
1586
1587 static void do_help(int argc, char **argv)
1588 {
1589 struct link_util *lu = NULL;
1590
1591 if (argc <= 0) {
1592 usage();
1593 return;
1594 }
1595
1596 lu = get_link_kind(*argv);
1597 if (lu && lu->print_help)
1598 lu->print_help(lu, argc-1, argv+1, stdout);
1599 else
1600 usage();
1601 }
1602
1603 int do_iplink(int argc, char **argv)
1604 {
1605 if (argc < 1)
1606 return ipaddr_list_link(0, NULL);
1607
1608 if (iplink_have_newlink()) {
1609 if (matches(*argv, "add") == 0)
1610 return iplink_modify(RTM_NEWLINK,
1611 NLM_F_CREATE|NLM_F_EXCL,
1612 argc-1, argv+1);
1613 if (matches(*argv, "set") == 0 ||
1614 matches(*argv, "change") == 0)
1615 return iplink_modify(RTM_NEWLINK, 0,
1616 argc-1, argv+1);
1617 if (matches(*argv, "replace") == 0)
1618 return iplink_modify(RTM_NEWLINK,
1619 NLM_F_CREATE|NLM_F_REPLACE,
1620 argc-1, argv+1);
1621 if (matches(*argv, "delete") == 0)
1622 return iplink_modify(RTM_DELLINK, 0,
1623 argc-1, argv+1);
1624 } else {
1625 #if IPLINK_IOCTL_COMPAT
1626 if (matches(*argv, "set") == 0)
1627 return do_set(argc-1, argv+1);
1628 #endif
1629 }
1630
1631 if (matches(*argv, "show") == 0 ||
1632 matches(*argv, "lst") == 0 ||
1633 matches(*argv, "list") == 0)
1634 return ipaddr_list_link(argc-1, argv+1);
1635
1636 if (matches(*argv, "xstats") == 0)
1637 return iplink_ifla_xstats(argc-1, argv+1);
1638
1639 if (matches(*argv, "afstats") == 0) {
1640 iplink_afstats(argc-1, argv+1);
1641 return 0;
1642 }
1643
1644 if (matches(*argv, "help") == 0) {
1645 do_help(argc-1, argv+1);
1646 return 0;
1647 }
1648
1649 fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n",
1650 *argv);
1651 exit(-1);
1652 }
Upstream mirror of iproute2