1 /* vi: set sw=4 ts=4: */
2 /*
3 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
4 * Patrick McHardy <kaber@trash.net>
5 *
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
7 */
8 #include <net/if.h>
9 /*#include <net/if_packet.h> - not needed? */
10 #include <netpacket/packet.h>
11 #include <netinet/if_ether.h>
12
13 #include <linux/if_vlan.h>
14 #include "ip_common.h" /* #include "libbb.h" is inside */
15 #include "rt_names.h"
16 #include "utils.h"
17
18 #undef ETH_P_8021AD
19 #define ETH_P_8021AD 0x88A8
20 #undef VLAN_FLAG_REORDER_HDR
21 #define VLAN_FLAG_REORDER_HDR 0x1
22 #undef VLAN_FLAG_GVRP
23 #define VLAN_FLAG_GVRP 0x2
24 #undef VLAN_FLAG_LOOSE_BINDING
25 #define VLAN_FLAG_LOOSE_BINDING 0x4
26 #undef VLAN_FLAG_MVRP
27 #define VLAN_FLAG_MVRP 0x8
28 #undef IFLA_VLAN_PROTOCOL
29 #define IFLA_VLAN_PROTOCOL 5
30
31 #ifndef IFLA_LINKINFO
32 # define IFLA_LINKINFO 18
33 # define IFLA_INFO_KIND 1
34 # define IFLA_INFO_DATA 2
35 #endif
36
37 #ifndef IFLA_VLAN_MAX
38 # define IFLA_VLAN_ID 1
39 # define IFLA_VLAN_FLAGS 2
40 struct ifla_vlan_flags {
41 uint32_t flags;
42 uint32_t mask;
43 };
44 #endif
45
46 /* taken from linux/sockios.h */
47 #define SIOCSIFNAME 0x8923 /* set interface name */
48
49 #if 0
50 # define dbg(...) bb_error_msg(__VA_ARGS__)
51 #else
52 # define dbg(...) ((void)0)
53 #endif
54
55 /* Exits on error */
get_ctl_fd(void)56 static int get_ctl_fd(void)
57 {
58 int fd;
59
60 fd = socket(PF_INET, SOCK_DGRAM, 0);
61 if (fd >= 0)
62 return fd;
63 fd = socket(PF_PACKET, SOCK_DGRAM, 0);
64 if (fd >= 0)
65 return fd;
66 return xsocket(PF_INET6, SOCK_DGRAM, 0);
67 }
68
69 /* Exits on error */
do_chflags(char * dev,uint32_t flags,uint32_t mask)70 static void do_chflags(char *dev, uint32_t flags, uint32_t mask)
71 {
72 struct ifreq ifr;
73 int fd;
74
75 strncpy_IFNAMSIZ(ifr.ifr_name, dev);
76 fd = get_ctl_fd();
77 xioctl(fd, SIOCGIFFLAGS, &ifr);
78 if ((ifr.ifr_flags ^ flags) & mask) {
79 ifr.ifr_flags &= ~mask;
80 ifr.ifr_flags |= mask & flags;
81 xioctl(fd, SIOCSIFFLAGS, &ifr);
82 }
83 close(fd);
84 }
85
86 /* Exits on error */
do_changename(char * dev,char * newdev)87 static void do_changename(char *dev, char *newdev)
88 {
89 struct ifreq ifr;
90 int fd;
91
92 strncpy_IFNAMSIZ(ifr.ifr_name, dev);
93 strncpy_IFNAMSIZ(ifr.ifr_newname, newdev);
94 fd = get_ctl_fd();
95 xioctl(fd, SIOCSIFNAME, &ifr);
96 close(fd);
97 }
98
99 /* Exits on error */
set_qlen(char * dev,int qlen)100 static void set_qlen(char *dev, int qlen)
101 {
102 struct ifreq ifr;
103 int s;
104
105 s = get_ctl_fd();
106 memset(&ifr, 0, sizeof(ifr));
107 strncpy_IFNAMSIZ(ifr.ifr_name, dev);
108 ifr.ifr_qlen = qlen;
109 xioctl(s, SIOCSIFTXQLEN, &ifr);
110 close(s);
111 }
112
113 /* Exits on error */
set_mtu(char * dev,int mtu)114 static void set_mtu(char *dev, int mtu)
115 {
116 struct ifreq ifr;
117 int s;
118
119 s = get_ctl_fd();
120 memset(&ifr, 0, sizeof(ifr));
121 strncpy_IFNAMSIZ(ifr.ifr_name, dev);
122 ifr.ifr_mtu = mtu;
123 xioctl(s, SIOCSIFMTU, &ifr);
124 close(s);
125 }
126
127 /* Exits on error */
get_address(char * dev,int * htype)128 static int get_address(char *dev, int *htype)
129 {
130 struct ifreq ifr;
131 struct sockaddr_ll me;
132 socklen_t alen;
133 int s;
134
135 s = xsocket(PF_PACKET, SOCK_DGRAM, 0);
136
137 memset(&ifr, 0, sizeof(ifr));
138 strncpy_IFNAMSIZ(ifr.ifr_name, dev);
139 xioctl(s, SIOCGIFINDEX, &ifr);
140
141 memset(&me, 0, sizeof(me));
142 me.sll_family = AF_PACKET;
143 me.sll_ifindex = ifr.ifr_ifindex;
144 me.sll_protocol = htons(ETH_P_LOOP);
145 xbind(s, (struct sockaddr*)&me, sizeof(me));
146 alen = sizeof(me);
147 getsockname(s, (struct sockaddr*)&me, &alen);
148 //never happens:
149 //if (getsockname(s, (struct sockaddr*)&me, &alen) == -1)
150 // bb_perror_msg_and_die("getsockname");
151 close(s);
152 *htype = me.sll_hatype;
153 return me.sll_halen;
154 }
155
156 /* Exits on error */
parse_address(char * dev,int hatype,int halen,char * lla,struct ifreq * ifr)157 static void parse_address(char *dev, int hatype, int halen, char *lla, struct ifreq *ifr)
158 {
159 int alen;
160
161 memset(ifr, 0, sizeof(*ifr));
162 strncpy_IFNAMSIZ(ifr->ifr_name, dev);
163 ifr->ifr_hwaddr.sa_family = hatype;
164
165 alen = hatype == 1/*ARPHRD_ETHER*/ ? 14/*ETH_HLEN*/ : 19/*INFINIBAND_HLEN*/;
166 alen = ll_addr_a2n((unsigned char *)(ifr->ifr_hwaddr.sa_data), alen, lla);
167 if (alen < 0)
168 exit(EXIT_FAILURE);
169 if (alen != halen) {
170 bb_error_msg_and_die("wrong address (%s) length: expected %d bytes", lla, halen);
171 }
172 }
173
174 /* Exits on error */
set_address(struct ifreq * ifr,int brd)175 static void set_address(struct ifreq *ifr, int brd)
176 {
177 int s;
178
179 s = get_ctl_fd();
180 if (brd)
181 xioctl(s, SIOCSIFHWBROADCAST, ifr);
182 else
183 xioctl(s, SIOCSIFHWADDR, ifr);
184 close(s);
185 }
186
187
188 static void die_must_be_on_off(const char *msg) NORETURN;
die_must_be_on_off(const char * msg)189 static void die_must_be_on_off(const char *msg)
190 {
191 bb_error_msg_and_die("argument of \"%s\" must be \"on\" or \"off\"", msg);
192 }
193
194 /* Return value becomes exitcode. It's okay to not return at all */
do_set(char ** argv)195 static int do_set(char **argv)
196 {
197 char *dev = NULL;
198 uint32_t mask = 0;
199 uint32_t flags = 0;
200 int qlen = -1;
201 int mtu = -1;
202 char *newaddr = NULL;
203 char *newbrd = NULL;
204 struct ifreq ifr0, ifr1;
205 char *newname = NULL;
206 int htype, halen;
207 static const char keywords[] ALIGN1 =
208 "up\0""down\0""name\0""mtu\0""qlen\0""multicast\0"
209 "arp\0""address\0""dev\0";
210 enum { ARG_up = 0, ARG_down, ARG_name, ARG_mtu, ARG_qlen, ARG_multicast,
211 ARG_arp, ARG_addr, ARG_dev };
212 static const char str_on_off[] ALIGN1 = "on\0""off\0";
213 enum { PARM_on = 0, PARM_off };
214 smalluint key;
215
216 while (*argv) {
217 /* substring search ensures that e.g. "addr" and "address"
218 * are both accepted */
219 key = index_in_substrings(keywords, *argv);
220 if (key == ARG_up) {
221 mask |= IFF_UP;
222 flags |= IFF_UP;
223 } else if (key == ARG_down) {
224 mask |= IFF_UP;
225 flags &= ~IFF_UP;
226 } else if (key == ARG_name) {
227 NEXT_ARG();
228 newname = *argv;
229 } else if (key == ARG_mtu) {
230 NEXT_ARG();
231 if (mtu != -1)
232 duparg("mtu", *argv);
233 mtu = get_unsigned(*argv, "mtu");
234 } else if (key == ARG_qlen) {
235 NEXT_ARG();
236 if (qlen != -1)
237 duparg("qlen", *argv);
238 qlen = get_unsigned(*argv, "qlen");
239 } else if (key == ARG_addr) {
240 NEXT_ARG();
241 newaddr = *argv;
242 } else if (key >= ARG_dev) {
243 if (key == ARG_dev) {
244 NEXT_ARG();
245 }
246 if (dev)
247 duparg2("dev", *argv);
248 dev = *argv;
249 } else {
250 int param;
251 NEXT_ARG();
252 param = index_in_strings(str_on_off, *argv);
253 if (key == ARG_multicast) {
254 if (param < 0)
255 die_must_be_on_off("multicast");
256 mask |= IFF_MULTICAST;
257 if (param == PARM_on)
258 flags |= IFF_MULTICAST;
259 else
260 flags &= ~IFF_MULTICAST;
261 } else if (key == ARG_arp) {
262 if (param < 0)
263 die_must_be_on_off("arp");
264 mask |= IFF_NOARP;
265 if (param == PARM_on)
266 flags &= ~IFF_NOARP;
267 else
268 flags |= IFF_NOARP;
269 }
270 }
271 argv++;
272 }
273
274 if (!dev) {
275 bb_error_msg_and_die(bb_msg_requires_arg, "\"dev\"");
276 }
277
278 if (newaddr || newbrd) {
279 halen = get_address(dev, &htype);
280 if (newaddr) {
281 parse_address(dev, htype, halen, newaddr, &ifr0);
282 set_address(&ifr0, 0);
283 }
284 if (newbrd) {
285 parse_address(dev, htype, halen, newbrd, &ifr1);
286 set_address(&ifr1, 1);
287 }
288 }
289
290 if (newname && strcmp(dev, newname)) {
291 do_changename(dev, newname);
292 dev = newname;
293 }
294 if (qlen != -1) {
295 set_qlen(dev, qlen);
296 }
297 if (mtu != -1) {
298 set_mtu(dev, mtu);
299 }
300 if (mask)
301 do_chflags(dev, flags, mask);
302 return 0;
303 }
304
ipaddr_list_link(char ** argv)305 static int ipaddr_list_link(char **argv)
306 {
307 preferred_family = AF_PACKET;
308 return ipaddr_list_or_flush(argv, 0);
309 }
310
vlan_parse_opt(char ** argv,struct nlmsghdr * n,unsigned int size)311 static void vlan_parse_opt(char **argv, struct nlmsghdr *n, unsigned int size)
312 {
313 static const char keywords[] ALIGN1 =
314 "id\0"
315 "protocol\0"
316 "reorder_hdr\0"
317 "gvrp\0"
318 "mvrp\0"
319 "loose_binding\0"
320 ;
321 static const char protocols[] ALIGN1 =
322 "802.1q\0"
323 "802.1ad\0"
324 ;
325 static const char str_on_off[] ALIGN1 =
326 "on\0"
327 "off\0"
328 ;
329 enum {
330 ARG_id = 0,
331 ARG_reorder_hdr,
332 ARG_gvrp,
333 ARG_mvrp,
334 ARG_loose_binding,
335 ARG_protocol,
336 };
337 enum {
338 PROTO_8021Q = 0,
339 PROTO_8021AD,
340 };
341 enum {
342 PARM_on = 0,
343 PARM_off
344 };
345 int arg;
346 uint16_t id, proto;
347 struct ifla_vlan_flags flags = {};
348
349 while (*argv) {
350 arg = index_in_substrings(keywords, *argv);
351 if (arg < 0)
352 invarg_1_to_2(*argv, "type vlan");
353
354 NEXT_ARG();
355 if (arg == ARG_id) {
356 id = get_u16(*argv, "id");
357 addattr_l(n, size, IFLA_VLAN_ID, &id, sizeof(id));
358 } else if (arg == ARG_protocol) {
359 arg = index_in_substrings(protocols, *argv);
360 if (arg == PROTO_8021Q)
361 proto = ETH_P_8021Q;
362 else if (arg == PROTO_8021AD)
363 proto = ETH_P_8021AD;
364 else
365 bb_error_msg_and_die("unknown VLAN encapsulation protocol '%s'",
366 *argv);
367 addattr_l(n, size, IFLA_VLAN_PROTOCOL, &proto, sizeof(proto));
368 } else {
369 int param = index_in_strings(str_on_off, *argv);
370 if (param < 0)
371 die_must_be_on_off(nth_string(keywords, arg));
372
373 if (arg == ARG_reorder_hdr) {
374 flags.mask |= VLAN_FLAG_REORDER_HDR;
375 flags.flags &= ~VLAN_FLAG_REORDER_HDR;
376 if (param == PARM_on)
377 flags.flags |= VLAN_FLAG_REORDER_HDR;
378 } else if (arg == ARG_gvrp) {
379 flags.mask |= VLAN_FLAG_GVRP;
380 flags.flags &= ~VLAN_FLAG_GVRP;
381 if (param == PARM_on)
382 flags.flags |= VLAN_FLAG_GVRP;
383 } else if (arg == ARG_mvrp) {
384 flags.mask |= VLAN_FLAG_MVRP;
385 flags.flags &= ~VLAN_FLAG_MVRP;
386 if (param == PARM_on)
387 flags.flags |= VLAN_FLAG_MVRP;
388 } else { /*if (arg == ARG_loose_binding) */
389 flags.mask |= VLAN_FLAG_LOOSE_BINDING;
390 flags.flags &= ~VLAN_FLAG_LOOSE_BINDING;
391 if (param == PARM_on)
392 flags.flags |= VLAN_FLAG_LOOSE_BINDING;
393 }
394 }
395 argv++;
396 }
397
398 if (flags.mask)
399 addattr_l(n, size, IFLA_VLAN_FLAGS, &flags, sizeof(flags));
400 }
401
402 #ifndef NLMSG_TAIL
403 #define NLMSG_TAIL(nmsg) \
404 ((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
405 #endif
406 /* Return value becomes exitcode. It's okay to not return at all */
do_add_or_delete(char ** argv,const unsigned rtm)407 static int do_add_or_delete(char **argv, const unsigned rtm)
408 {
409 static const char keywords[] ALIGN1 =
410 "link\0""name\0""type\0""dev\0""address\0";
411 enum {
412 ARG_link,
413 ARG_name,
414 ARG_type,
415 ARG_dev,
416 ARG_address,
417 };
418 struct rtnl_handle rth;
419 struct {
420 struct nlmsghdr n;
421 struct ifinfomsg i;
422 char buf[1024];
423 } req;
424 smalluint arg;
425 char *name_str = NULL;
426 char *link_str = NULL;
427 char *type_str = NULL;
428 char *dev_str = NULL;
429 char *address_str = NULL;
430
431 memset(&req, 0, sizeof(req));
432
433 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
434 req.n.nlmsg_flags = NLM_F_REQUEST;
435 req.n.nlmsg_type = rtm;
436 req.i.ifi_family = preferred_family;
437 if (rtm == RTM_NEWLINK)
438 req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
439
440 while (*argv) {
441 arg = index_in_substrings(keywords, *argv);
442 if (arg == ARG_type) {
443 NEXT_ARG();
444 type_str = *argv++;
445 dbg("type_str:'%s'", type_str);
446 break;
447 }
448 if (arg == ARG_link) {
449 NEXT_ARG();
450 link_str = *argv;
451 dbg("link_str:'%s'", link_str);
452 } else if (arg == ARG_name) {
453 NEXT_ARG();
454 name_str = *argv;
455 dbg("name_str:'%s'", name_str);
456 } else if (arg == ARG_address) {
457 NEXT_ARG();
458 address_str = *argv;
459 dbg("address_str:'%s'", name_str);
460 } else {
461 if (arg == ARG_dev) {
462 if (dev_str)
463 duparg(*argv, "dev");
464 NEXT_ARG();
465 }
466 dev_str = *argv;
467 dbg("dev_str:'%s'", dev_str);
468 }
469 argv++;
470 }
471 xrtnl_open(&rth);
472 ll_init_map(&rth);
473 if (type_str) {
474 struct rtattr *linkinfo = NLMSG_TAIL(&req.n);
475
476 addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
477 addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type_str,
478 strlen(type_str));
479
480 if (*argv) {
481 struct rtattr *data = NLMSG_TAIL(&req.n);
482 addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0);
483
484 if (strcmp(type_str, "vlan") == 0)
485 vlan_parse_opt(argv, &req.n, sizeof(req));
486
487 data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data;
488 }
489
490 linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
491 }
492 if (rtm != RTM_NEWLINK) {
493 if (!dev_str)
494 return 1; /* Need a device to delete */
495 req.i.ifi_index = xll_name_to_index(dev_str);
496 } else {
497 if (!name_str)
498 name_str = dev_str;
499 if (link_str) {
500 int idx = xll_name_to_index(link_str);
501 addattr_l(&req.n, sizeof(req), IFLA_LINK, &idx, 4);
502 }
503 if (address_str) {
504 unsigned char abuf[32];
505 int len = ll_addr_a2n(abuf, sizeof(abuf), address_str);
506 dbg("address len:%d", len);
507 if (len < 0)
508 return -1;
509 addattr_l(&req.n, sizeof(req), IFLA_ADDRESS, abuf, len);
510 }
511 }
512 if (name_str) {
513 const size_t name_len = strlen(name_str) + 1;
514 if (name_len < 2 || name_len > IFNAMSIZ)
515 invarg_1_to_2(name_str, "name");
516 addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name_str, name_len);
517 }
518 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
519 return 2;
520 return 0;
521 }
522
523 /* Other keywords recognized by iproute2-3.12.0: */
524 #if 0
525 } else if (matches(*argv, "broadcast") == 0 ||
526 strcmp(*argv, "brd") == 0) {
527 NEXT_ARG();
528 len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
529 if (len < 0)
530 return -1;
531 addattr_l(&req->n, sizeof(*req), IFLA_BROADCAST, abuf, len);
532 } else if (matches(*argv, "txqueuelen") == 0 ||
533 strcmp(*argv, "qlen") == 0 ||
534 matches(*argv, "txqlen") == 0) {
535 NEXT_ARG();
536 if (qlen != -1)
537 duparg("txqueuelen", *argv);
538 if (get_integer(&qlen, *argv, 0))
539 invarg_1_to_2(*argv, "txqueuelen");
540 addattr_l(&req->n, sizeof(*req), IFLA_TXQLEN, &qlen, 4);
541 } else if (strcmp(*argv, "mtu") == 0) {
542 NEXT_ARG();
543 if (mtu != -1)
544 duparg("mtu", *argv);
545 if (get_integer(&mtu, *argv, 0))
546 invarg_1_to_2(*argv, "mtu");
547 addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4);
548 } else if (strcmp(*argv, "netns") == 0) {
549 NEXT_ARG();
550 if (netns != -1)
551 duparg("netns", *argv);
552 if ((netns = get_netns_fd(*argv)) >= 0)
553 addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_FD, &netns, 4);
554 else if (get_integer(&netns, *argv, 0) == 0)
555 addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_PID, &netns, 4);
556 else
557 invarg_1_to_2(*argv, "netns");
558 } else if (strcmp(*argv, "multicast") == 0) {
559 NEXT_ARG();
560 req->i.ifi_change |= IFF_MULTICAST;
561 if (strcmp(*argv, "on") == 0) {
562 req->i.ifi_flags |= IFF_MULTICAST;
563 } else if (strcmp(*argv, "off") == 0) {
564 req->i.ifi_flags &= ~IFF_MULTICAST;
565 } else
566 return on_off("multicast", *argv);
567 } else if (strcmp(*argv, "allmulticast") == 0) {
568 NEXT_ARG();
569 req->i.ifi_change |= IFF_ALLMULTI;
570 if (strcmp(*argv, "on") == 0) {
571 req->i.ifi_flags |= IFF_ALLMULTI;
572 } else if (strcmp(*argv, "off") == 0) {
573 req->i.ifi_flags &= ~IFF_ALLMULTI;
574 } else
575 return on_off("allmulticast", *argv);
576 } else if (strcmp(*argv, "promisc") == 0) {
577 NEXT_ARG();
578 req->i.ifi_change |= IFF_PROMISC;
579 if (strcmp(*argv, "on") == 0) {
580 req->i.ifi_flags |= IFF_PROMISC;
581 } else if (strcmp(*argv, "off") == 0) {
582 req->i.ifi_flags &= ~IFF_PROMISC;
583 } else
584 return on_off("promisc", *argv);
585 } else if (strcmp(*argv, "trailers") == 0) {
586 NEXT_ARG();
587 req->i.ifi_change |= IFF_NOTRAILERS;
588 if (strcmp(*argv, "off") == 0) {
589 req->i.ifi_flags |= IFF_NOTRAILERS;
590 } else if (strcmp(*argv, "on") == 0) {
591 req->i.ifi_flags &= ~IFF_NOTRAILERS;
592 } else
593 return on_off("trailers", *argv);
594 } else if (strcmp(*argv, "arp") == 0) {
595 NEXT_ARG();
596 req->i.ifi_change |= IFF_NOARP;
597 if (strcmp(*argv, "on") == 0) {
598 req->i.ifi_flags &= ~IFF_NOARP;
599 } else if (strcmp(*argv, "off") == 0) {
600 req->i.ifi_flags |= IFF_NOARP;
601 } else
602 return on_off("noarp", *argv);
603 } else if (strcmp(*argv, "vf") == 0) {
604 struct rtattr *vflist;
605 NEXT_ARG();
606 if (get_integer(&vf, *argv, 0)) {
607 invarg_1_to_2(*argv, "vf");
608 }
609 vflist = addattr_nest(&req->n, sizeof(*req),
610 IFLA_VFINFO_LIST);
611 len = iplink_parse_vf(vf, &argc, &argv, req);
612 if (len < 0)
613 return -1;
614 addattr_nest_end(&req->n, vflist);
615 } else if (matches(*argv, "master") == 0) {
616 int ifindex;
617 NEXT_ARG();
618 ifindex = ll_name_to_index(*argv);
619 if (!ifindex)
620 invarg_1_to_2(*argv, "master");
621 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
622 &ifindex, 4);
623 } else if (matches(*argv, "nomaster") == 0) {
624 int ifindex = 0;
625 addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
626 &ifindex, 4);
627 } else if (matches(*argv, "dynamic") == 0) {
628 NEXT_ARG();
629 req->i.ifi_change |= IFF_DYNAMIC;
630 if (strcmp(*argv, "on") == 0) {
631 req->i.ifi_flags |= IFF_DYNAMIC;
632 } else if (strcmp(*argv, "off") == 0) {
633 req->i.ifi_flags &= ~IFF_DYNAMIC;
634 } else
635 return on_off("dynamic", *argv);
636 } else if (matches(*argv, "alias") == 0) {
637 NEXT_ARG();
638 addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
639 *argv, strlen(*argv));
640 argc--; argv++;
641 break;
642 } else if (strcmp(*argv, "group") == 0) {
643 NEXT_ARG();
644 if (*group != -1)
645 duparg("group", *argv);
646 if (rtnl_group_a2n(group, *argv))
647 invarg_1_to_2(*argv, "group");
648 } else if (strcmp(*argv, "mode") == 0) {
649 int mode;
650 NEXT_ARG();
651 mode = get_link_mode(*argv);
652 if (mode < 0)
653 invarg_1_to_2(*argv, "mode");
654 addattr8(&req->n, sizeof(*req), IFLA_LINKMODE, mode);
655 } else if (strcmp(*argv, "state") == 0) {
656 int state;
657 NEXT_ARG();
658 state = get_operstate(*argv);
659 if (state < 0)
660 invarg_1_to_2(*argv, "state");
661 addattr8(&req->n, sizeof(*req), IFLA_OPERSTATE, state);
662 } else if (matches(*argv, "numtxqueues") == 0) {
663 NEXT_ARG();
664 if (numtxqueues != -1)
665 duparg("numtxqueues", *argv);
666 if (get_integer(&numtxqueues, *argv, 0))
667 invarg_1_to_2(*argv, "numtxqueues");
668 addattr_l(&req->n, sizeof(*req), IFLA_NUM_TX_QUEUES,
669 &numtxqueues, 4);
670 } else if (matches(*argv, "numrxqueues") == 0) {
671 NEXT_ARG();
672 if (numrxqueues != -1)
673 duparg("numrxqueues", *argv);
674 if (get_integer(&numrxqueues, *argv, 0))
675 invarg_1_to_2(*argv, "numrxqueues");
676 addattr_l(&req->n, sizeof(*req), IFLA_NUM_RX_QUEUES,
677 &numrxqueues, 4);
678 }
679 #endif
680
681 /* Return value becomes exitcode. It's okay to not return at all */
do_iplink(char ** argv)682 int FAST_FUNC do_iplink(char **argv)
683 {
684 static const char keywords[] ALIGN1 =
685 "add\0""delete\0""set\0""show\0""lst\0""list\0";
686 if (*argv) {
687 int key = index_in_substrings(keywords, *argv);
688 if (key < 0) /* invalid argument */
689 invarg_1_to_2(*argv, applet_name);
690 argv++;
691 if (key <= 1) /* add/delete */
692 return do_add_or_delete(argv, key ? RTM_DELLINK : RTM_NEWLINK);
693 if (key == 2) /* set */
694 return do_set(argv);
695 }
696 /* show, lst, list */
697 return ipaddr_list_link(argv);
698 }
699