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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
19 #include <sys/socket.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>
27 #include <sys/ioctl.h>
29 #include <linux/mpls.h>
33 #include "ip_common.h"
35 #include "namespace.h"
37 #define IPLINK_IOCTL_COMPAT 1
39 #define LIBDIR "/usr/lib"
42 static void usage(void) __attribute__((noreturn
));
43 static int iplink_have_newlink(void);
45 void iplink_usage(void)
47 if (iplink_have_newlink()) {
49 "Usage: ip link add [link DEV] [ name ] NAME\n"
50 " [ txqueuelen PACKETS ]\n"
51 " [ address LLADDR ]\n"
52 " [ broadcast LLADDR ]\n"
53 " [ mtu MTU ] [index IDX ]\n"
54 " [ numtxqueues QUEUE_COUNT ]\n"
55 " [ numrxqueues QUEUE_COUNT ]\n"
56 " type TYPE [ ARGS ]\n"
58 " ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n"
60 " ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n"
61 " [ { up | down } ]\n"
62 " [ type TYPE ARGS ]\n");
65 "Usage: ip link set DEVICE [ { up | down } ]\n");
68 " [ arp { on | off } ]\n"
69 " [ dynamic { on | off } ]\n"
70 " [ multicast { on | off } ]\n"
71 " [ allmulticast { on | off } ]\n"
72 " [ promisc { on | off } ]\n"
73 " [ trailers { on | off } ]\n"
74 " [ carrier { on | off } ]\n"
75 " [ txqueuelen PACKETS ]\n"
77 " [ address LLADDR ]\n"
78 " [ broadcast LLADDR ]\n"
80 " [ netns { PID | NAME } ]\n"
81 " [ link-netnsid ID ]\n"
83 " [ vf NUM [ mac LLADDR ]\n"
84 " [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-PROTO ] ]\n"
86 " [ max_tx_rate TXRATE ]\n"
87 " [ min_tx_rate TXRATE ]\n"
88 " [ spoofchk { on | off} ]\n"
89 " [ query_rss { on | off} ]\n"
90 " [ state { auto | enable | disable} ] ]\n"
91 " [ trust { on | off} ] ]\n"
92 " [ node_guid { eui64 } ]\n"
93 " [ port_guid { eui64 } ]\n"
95 " object FILE [ section NAME ] [ verbose ] |\n"
97 " [ master DEVICE ][ vrf NAME ]\n"
99 " [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
100 " [ protodown { on | off } ]\n"
102 " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n");
104 fprintf(stderr
, "\n ip link xstats type TYPE [ ARGS ]\n");
105 fprintf(stderr
, "\n ip link afstats [ dev DEVICE ]\n");
107 if (iplink_have_newlink()) {
110 " ip link help [ TYPE ]\n"
112 "TYPE := { vlan | veth | vcan | vxcan | dummy | ifb | macvlan | macvtap |\n"
113 " bridge | bond | team | ipoib | ip6tnl | ipip | sit | vxlan |\n"
114 " gre | gretap | erspan | ip6gre | ip6gretap | ip6erspan |\n"
115 " vti | nlmon | team_slave | bond_slave | ipvlan | geneve |\n"
116 " bridge_slave | vrf | macsec }\n");
121 static void usage(void)
126 static int on_off(const char *msg
, const char *realval
)
129 "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
134 static void *BODY
; /* cached dlopen(NULL) handle */
135 static struct link_util
*linkutil_list
;
137 struct link_util
*get_link_kind(const char *id
)
143 for (l
= linkutil_list
; l
; l
= l
->next
)
144 if (strcmp(l
->id
, id
) == 0)
147 snprintf(buf
, sizeof(buf
), LIBDIR
"/ip/link_%s.so", id
);
148 dlh
= dlopen(buf
, RTLD_LAZY
);
150 /* look in current binary, only open once */
153 dlh
= BODY
= dlopen(NULL
, RTLD_LAZY
);
159 snprintf(buf
, sizeof(buf
), "%s_link_util", id
);
164 l
->next
= linkutil_list
;
169 static int get_link_mode(const char *mode
)
171 if (strcasecmp(mode
, "default") == 0)
172 return IF_LINK_MODE_DEFAULT
;
173 if (strcasecmp(mode
, "dormant") == 0)
174 return IF_LINK_MODE_DORMANT
;
178 static int get_addr_gen_mode(const char *mode
)
180 if (strcasecmp(mode
, "eui64") == 0)
181 return IN6_ADDR_GEN_MODE_EUI64
;
182 if (strcasecmp(mode
, "none") == 0)
183 return IN6_ADDR_GEN_MODE_NONE
;
184 if (strcasecmp(mode
, "stable_secret") == 0)
185 return IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
186 if (strcasecmp(mode
, "random") == 0)
187 return IN6_ADDR_GEN_MODE_RANDOM
;
191 #if IPLINK_IOCTL_COMPAT
192 static int have_rtnl_newlink
= -1;
194 static int accept_msg(const struct sockaddr_nl
*who
,
195 struct rtnl_ctrl_data
*ctrl
,
196 struct nlmsghdr
*n
, void *arg
)
198 struct nlmsgerr
*err
= (struct nlmsgerr
*)NLMSG_DATA(n
);
200 if (n
->nlmsg_type
== NLMSG_ERROR
&&
201 (err
->error
== -EOPNOTSUPP
|| err
->error
== -EINVAL
))
202 have_rtnl_newlink
= 0;
204 have_rtnl_newlink
= 1;
208 static int iplink_have_newlink(void)
215 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
216 .n
.nlmsg_flags
= NLM_F_REQUEST
| NLM_F_ACK
,
217 .n
.nlmsg_type
= RTM_NEWLINK
,
218 .i
.ifi_family
= AF_UNSPEC
,
221 if (have_rtnl_newlink
< 0) {
222 if (rtnl_send(&rth
, &req
.n
, req
.n
.nlmsg_len
) < 0) {
223 perror("request send failed");
226 rtnl_listen(&rth
, accept_msg
, NULL
);
228 return have_rtnl_newlink
;
230 #else /* IPLINK_IOCTL_COMPAT */
231 static int iplink_have_newlink(void)
235 #endif /* ! IPLINK_IOCTL_COMPAT */
237 static int nl_get_ll_addr_len(unsigned int dev_index
)
240 struct iplink_req req
= {
242 .nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
243 .nlmsg_type
= RTM_GETLINK
,
244 .nlmsg_flags
= NLM_F_REQUEST
247 .ifi_family
= preferred_family
,
248 .ifi_index
= dev_index
,
251 struct nlmsghdr
*answer
;
252 struct rtattr
*tb
[IFLA_MAX
+1];
254 if (rtnl_talk(&rth
, &req
.n
, &answer
) < 0)
257 len
= answer
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct ifinfomsg
));
263 parse_rtattr_flags(tb
, IFLA_MAX
, IFLA_RTA(NLMSG_DATA(answer
)),
265 if (!tb
[IFLA_ADDRESS
]) {
271 return RTA_PAYLOAD(tb
[IFLA_ADDRESS
]);
274 static void iplink_parse_vf_vlan_info(int vf
, int *argcp
, char ***argvp
,
275 struct ifla_vf_vlan_info
*ivvip
)
278 char **argv
= *argvp
;
281 if (get_unsigned(&ivvip
->vlan
, *argv
, 0))
282 invarg("Invalid \"vlan\" value\n", *argv
);
286 ivvip
->vlan_proto
= htons(ETH_P_8021Q
);
289 if (matches(*argv
, "qos") == 0) {
291 if (get_unsigned(&ivvip
->qos
, *argv
, 0))
292 invarg("Invalid \"qos\" value\n", *argv
);
300 if (matches(*argv
, "proto") == 0) {
302 if (ll_proto_a2n(&ivvip
->vlan_proto
, *argv
))
303 invarg("protocol is invalid\n", *argv
);
304 if (ivvip
->vlan_proto
!= htons(ETH_P_8021AD
) &&
305 ivvip
->vlan_proto
!= htons(ETH_P_8021Q
)) {
308 char msg
[64 + sizeof(b1
) + sizeof(b2
)];
311 "Invalid \"vlan protocol\" value - supported %s, %s\n",
312 ll_proto_n2a(htons(ETH_P_8021Q
),
314 ll_proto_n2a(htons(ETH_P_8021AD
),
328 static int iplink_parse_vf(int vf
, int *argcp
, char ***argvp
,
329 struct iplink_req
*req
, int dev_index
)
331 char new_rate_api
= 0, count
= 0, override_legacy_rate
= 0;
332 struct ifla_vf_rate tivt
;
333 int len
, argc
= *argcp
;
334 char **argv
= *argvp
;
335 struct rtattr
*vfinfo
;
337 tivt
.min_tx_rate
= -1;
338 tivt
.max_tx_rate
= -1;
340 vfinfo
= addattr_nest(&req
->n
, sizeof(*req
), IFLA_VF_INFO
);
342 while (NEXT_ARG_OK()) {
345 if (!matches(*argv
, "max_tx_rate")) {
348 /* override legacy rate */
349 override_legacy_rate
= 1;
350 } else if (!matches(*argv
, "min_tx_rate")) {
361 while (NEXT_ARG_OK()) {
363 if (matches(*argv
, "mac") == 0) {
364 struct ifla_vf_mac ivm
= { 0 };
365 int halen
= nl_get_ll_addr_len(dev_index
);
369 len
= ll_addr_a2n((char *)ivm
.mac
, 32, *argv
);
372 if (halen
> 0 && len
!= halen
) {
374 "Invalid address length %d - must be %d bytes\n",
378 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_MAC
,
380 } else if (matches(*argv
, "vlan") == 0) {
381 struct ifla_vf_vlan_info ivvi
;
383 iplink_parse_vf_vlan_info(vf
, &argc
, &argv
, &ivvi
);
384 /* support the old interface in case of older kernel*/
385 if (ivvi
.vlan_proto
== htons(ETH_P_8021Q
)) {
386 struct ifla_vf_vlan ivv
;
389 ivv
.vlan
= ivvi
.vlan
;
391 addattr_l(&req
->n
, sizeof(*req
),
392 IFLA_VF_VLAN
, &ivv
, sizeof(ivv
));
394 struct rtattr
*vfvlanlist
;
396 vfvlanlist
= addattr_nest(&req
->n
, sizeof(*req
),
398 addattr_l(&req
->n
, sizeof(*req
),
399 IFLA_VF_VLAN_INFO
, &ivvi
,
402 while (NEXT_ARG_OK()) {
404 if (matches(*argv
, "vlan") != 0) {
408 iplink_parse_vf_vlan_info(vf
, &argc
,
410 addattr_l(&req
->n
, sizeof(*req
),
411 IFLA_VF_VLAN_INFO
, &ivvi
,
414 addattr_nest_end(&req
->n
, vfvlanlist
);
416 } else if (matches(*argv
, "rate") == 0) {
417 struct ifla_vf_tx_rate ivt
;
420 if (get_unsigned(&ivt
.rate
, *argv
, 0))
421 invarg("Invalid \"rate\" value\n", *argv
);
425 addattr_l(&req
->n
, sizeof(*req
),
426 IFLA_VF_TX_RATE
, &ivt
, sizeof(ivt
));
427 else if (!override_legacy_rate
)
428 tivt
.max_tx_rate
= ivt
.rate
;
430 } else if (matches(*argv
, "max_tx_rate") == 0) {
432 if (get_unsigned(&tivt
.max_tx_rate
, *argv
, 0))
433 invarg("Invalid \"max tx rate\" value\n",
437 } else if (matches(*argv
, "min_tx_rate") == 0) {
439 if (get_unsigned(&tivt
.min_tx_rate
, *argv
, 0))
440 invarg("Invalid \"min tx rate\" value\n",
444 } else if (matches(*argv
, "spoofchk") == 0) {
445 struct ifla_vf_spoofchk ivs
;
448 if (matches(*argv
, "on") == 0)
450 else if (matches(*argv
, "off") == 0)
453 return on_off("spoofchk", *argv
);
455 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_SPOOFCHK
,
458 } else if (matches(*argv
, "query_rss") == 0) {
459 struct ifla_vf_rss_query_en ivs
;
462 if (matches(*argv
, "on") == 0)
464 else if (matches(*argv
, "off") == 0)
467 return on_off("query_rss", *argv
);
469 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_RSS_QUERY_EN
,
472 } else if (matches(*argv
, "trust") == 0) {
473 struct ifla_vf_trust ivt
;
476 if (matches(*argv
, "on") == 0)
478 else if (matches(*argv
, "off") == 0)
481 invarg("Invalid \"trust\" value\n", *argv
);
483 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_TRUST
,
486 } else if (matches(*argv
, "state") == 0) {
487 struct ifla_vf_link_state ivl
;
490 if (matches(*argv
, "auto") == 0)
491 ivl
.link_state
= IFLA_VF_LINK_STATE_AUTO
;
492 else if (matches(*argv
, "enable") == 0)
493 ivl
.link_state
= IFLA_VF_LINK_STATE_ENABLE
;
494 else if (matches(*argv
, "disable") == 0)
495 ivl
.link_state
= IFLA_VF_LINK_STATE_DISABLE
;
497 invarg("Invalid \"state\" value\n", *argv
);
499 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_LINK_STATE
,
501 } else if (matches(*argv
, "node_guid") == 0) {
502 struct ifla_vf_guid ivg
;
506 if (get_guid(&ivg
.guid
, *argv
)) {
507 invarg("Invalid GUID format\n", *argv
);
510 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_IB_NODE_GUID
,
512 } else if (matches(*argv
, "port_guid") == 0) {
513 struct ifla_vf_guid ivg
;
517 if (get_guid(&ivg
.guid
, *argv
)) {
518 invarg("Invalid GUID format\n", *argv
);
521 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_IB_PORT_GUID
,
533 if (tivt
.min_tx_rate
== -1 || tivt
.max_tx_rate
== -1) {
534 ipaddr_get_vf_rate(tivt
.vf
, &tmin
, &tmax
, dev_index
);
535 if (tivt
.min_tx_rate
== -1)
536 tivt
.min_tx_rate
= tmin
;
537 if (tivt
.max_tx_rate
== -1)
538 tivt
.max_tx_rate
= tmax
;
540 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_RATE
, &tivt
,
545 incomplete_command();
547 addattr_nest_end(&req
->n
, vfinfo
);
554 int iplink_parse(int argc
, char **argv
, struct iplink_req
*req
,
555 char **name
, char **type
, char **link
, char **dev
,
556 int *group
, int *index
)
564 int numtxqueues
= -1;
565 int numrxqueues
= -1;
567 int link_netnsid
= -1;
574 if (strcmp(*argv
, "up") == 0) {
575 req
->i
.ifi_change
|= IFF_UP
;
576 req
->i
.ifi_flags
|= IFF_UP
;
577 } else if (strcmp(*argv
, "down") == 0) {
578 req
->i
.ifi_change
|= IFF_UP
;
579 req
->i
.ifi_flags
&= ~IFF_UP
;
580 } else if (strcmp(*argv
, "name") == 0) {
582 if (check_ifname(*argv
))
583 invarg("\"name\" not a valid ifname", *argv
);
585 } else if (strcmp(*argv
, "index") == 0) {
587 *index
= atoi(*argv
);
589 invarg("Invalid \"index\" value", *argv
);
590 } else if (matches(*argv
, "link") == 0) {
593 } else if (matches(*argv
, "address") == 0) {
595 addr_len
= ll_addr_a2n(abuf
, sizeof(abuf
), *argv
);
598 addattr_l(&req
->n
, sizeof(*req
),
599 IFLA_ADDRESS
, abuf
, addr_len
);
600 } else if (matches(*argv
, "broadcast") == 0 ||
601 strcmp(*argv
, "brd") == 0) {
603 len
= ll_addr_a2n(abuf
, sizeof(abuf
), *argv
);
606 addattr_l(&req
->n
, sizeof(*req
),
607 IFLA_BROADCAST
, abuf
, len
);
608 } else if (matches(*argv
, "txqueuelen") == 0 ||
609 strcmp(*argv
, "qlen") == 0 ||
610 matches(*argv
, "txqlen") == 0) {
613 duparg("txqueuelen", *argv
);
614 if (get_integer(&qlen
, *argv
, 0))
615 invarg("Invalid \"txqueuelen\" value\n", *argv
);
616 addattr_l(&req
->n
, sizeof(*req
),
617 IFLA_TXQLEN
, &qlen
, 4);
618 } else if (strcmp(*argv
, "mtu") == 0) {
621 duparg("mtu", *argv
);
622 if (get_integer(&mtu
, *argv
, 0))
623 invarg("Invalid \"mtu\" value\n", *argv
);
624 addattr_l(&req
->n
, sizeof(*req
), IFLA_MTU
, &mtu
, 4);
625 } else if (strcmp(*argv
, "xdpgeneric") == 0 ||
626 strcmp(*argv
, "xdpdrv") == 0 ||
627 strcmp(*argv
, "xdpoffload") == 0 ||
628 strcmp(*argv
, "xdp") == 0) {
629 bool generic
= strcmp(*argv
, "xdpgeneric") == 0;
630 bool drv
= strcmp(*argv
, "xdpdrv") == 0;
631 bool offload
= strcmp(*argv
, "xdpoffload") == 0;
634 if (xdp_parse(&argc
, &argv
, req
, dev_index
,
635 generic
, drv
, offload
))
637 } else if (strcmp(*argv
, "netns") == 0) {
640 duparg("netns", *argv
);
641 netns
= netns_get_fd(*argv
);
643 addattr_l(&req
->n
, sizeof(*req
), IFLA_NET_NS_FD
,
645 else if (get_integer(&netns
, *argv
, 0) == 0)
646 addattr_l(&req
->n
, sizeof(*req
),
647 IFLA_NET_NS_PID
, &netns
, 4);
649 invarg("Invalid \"netns\" value\n", *argv
);
650 } else if (strcmp(*argv
, "multicast") == 0) {
652 req
->i
.ifi_change
|= IFF_MULTICAST
;
654 if (strcmp(*argv
, "on") == 0)
655 req
->i
.ifi_flags
|= IFF_MULTICAST
;
656 else if (strcmp(*argv
, "off") == 0)
657 req
->i
.ifi_flags
&= ~IFF_MULTICAST
;
659 return on_off("multicast", *argv
);
660 } else if (strcmp(*argv
, "allmulticast") == 0) {
662 req
->i
.ifi_change
|= IFF_ALLMULTI
;
664 if (strcmp(*argv
, "on") == 0)
665 req
->i
.ifi_flags
|= IFF_ALLMULTI
;
666 else if (strcmp(*argv
, "off") == 0)
667 req
->i
.ifi_flags
&= ~IFF_ALLMULTI
;
669 return on_off("allmulticast", *argv
);
670 } else if (strcmp(*argv
, "promisc") == 0) {
672 req
->i
.ifi_change
|= IFF_PROMISC
;
674 if (strcmp(*argv
, "on") == 0)
675 req
->i
.ifi_flags
|= IFF_PROMISC
;
676 else if (strcmp(*argv
, "off") == 0)
677 req
->i
.ifi_flags
&= ~IFF_PROMISC
;
679 return on_off("promisc", *argv
);
680 } else if (strcmp(*argv
, "trailers") == 0) {
682 req
->i
.ifi_change
|= IFF_NOTRAILERS
;
684 if (strcmp(*argv
, "off") == 0)
685 req
->i
.ifi_flags
|= IFF_NOTRAILERS
;
686 else if (strcmp(*argv
, "on") == 0)
687 req
->i
.ifi_flags
&= ~IFF_NOTRAILERS
;
689 return on_off("trailers", *argv
);
690 } else if (strcmp(*argv
, "arp") == 0) {
692 req
->i
.ifi_change
|= IFF_NOARP
;
694 if (strcmp(*argv
, "on") == 0)
695 req
->i
.ifi_flags
&= ~IFF_NOARP
;
696 else if (strcmp(*argv
, "off") == 0)
697 req
->i
.ifi_flags
|= IFF_NOARP
;
699 return on_off("arp", *argv
);
700 } else if (strcmp(*argv
, "carrier") == 0) {
704 if (strcmp(*argv
, "on") == 0)
706 else if (strcmp(*argv
, "off") == 0)
709 return on_off("carrier", *argv
);
711 addattr8(&req
->n
, sizeof(*req
), IFLA_CARRIER
, carrier
);
712 } else if (strcmp(*argv
, "vf") == 0) {
713 struct rtattr
*vflist
;
716 if (get_integer(&vf
, *argv
, 0))
717 invarg("Invalid \"vf\" value\n", *argv
);
719 vflist
= addattr_nest(&req
->n
, sizeof(*req
),
724 len
= iplink_parse_vf(vf
, &argc
, &argv
, req
, dev_index
);
727 addattr_nest_end(&req
->n
, vflist
);
728 } else if (matches(*argv
, "master") == 0) {
732 ifindex
= ll_name_to_index(*argv
);
734 invarg("Device does not exist\n", *argv
);
735 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
737 } else if (strcmp(*argv
, "vrf") == 0) {
741 ifindex
= ll_name_to_index(*argv
);
743 invarg("Not a valid VRF name\n", *argv
);
744 if (!name_is_vrf(*argv
))
745 invarg("Not a valid VRF name\n", *argv
);
746 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
747 &ifindex
, sizeof(ifindex
));
748 } else if (matches(*argv
, "nomaster") == 0) {
751 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
753 } else if (matches(*argv
, "dynamic") == 0) {
755 req
->i
.ifi_change
|= IFF_DYNAMIC
;
757 if (strcmp(*argv
, "on") == 0)
758 req
->i
.ifi_flags
|= IFF_DYNAMIC
;
759 else if (strcmp(*argv
, "off") == 0)
760 req
->i
.ifi_flags
&= ~IFF_DYNAMIC
;
762 return on_off("dynamic", *argv
);
763 } else if (matches(*argv
, "type") == 0) {
768 } else if (matches(*argv
, "alias") == 0) {
770 addattr_l(&req
->n
, sizeof(*req
), IFLA_IFALIAS
,
771 *argv
, strlen(*argv
));
774 } else if (strcmp(*argv
, "group") == 0) {
777 duparg("group", *argv
);
778 if (rtnl_group_a2n(group
, *argv
))
779 invarg("Invalid \"group\" value\n", *argv
);
780 } else if (strcmp(*argv
, "mode") == 0) {
784 mode
= get_link_mode(*argv
);
786 invarg("Invalid link mode\n", *argv
);
787 addattr8(&req
->n
, sizeof(*req
), IFLA_LINKMODE
, mode
);
788 } else if (strcmp(*argv
, "state") == 0) {
792 state
= get_operstate(*argv
);
794 invarg("Invalid operstate\n", *argv
);
796 addattr8(&req
->n
, sizeof(*req
), IFLA_OPERSTATE
, state
);
797 } else if (matches(*argv
, "numtxqueues") == 0) {
799 if (numtxqueues
!= -1)
800 duparg("numtxqueues", *argv
);
801 if (get_integer(&numtxqueues
, *argv
, 0))
802 invarg("Invalid \"numtxqueues\" value\n",
804 addattr_l(&req
->n
, sizeof(*req
), IFLA_NUM_TX_QUEUES
,
806 } else if (matches(*argv
, "numrxqueues") == 0) {
808 if (numrxqueues
!= -1)
809 duparg("numrxqueues", *argv
);
810 if (get_integer(&numrxqueues
, *argv
, 0))
811 invarg("Invalid \"numrxqueues\" value\n",
813 addattr_l(&req
->n
, sizeof(*req
), IFLA_NUM_RX_QUEUES
,
815 } else if (matches(*argv
, "addrgenmode") == 0) {
816 struct rtattr
*afs
, *afs6
;
820 mode
= get_addr_gen_mode(*argv
);
822 invarg("Invalid address generation mode\n",
824 afs
= addattr_nest(&req
->n
, sizeof(*req
), IFLA_AF_SPEC
);
825 afs6
= addattr_nest(&req
->n
, sizeof(*req
), AF_INET6
);
826 addattr8(&req
->n
, sizeof(*req
),
827 IFLA_INET6_ADDR_GEN_MODE
, mode
);
828 addattr_nest_end(&req
->n
, afs6
);
829 addattr_nest_end(&req
->n
, afs
);
830 } else if (matches(*argv
, "link-netnsid") == 0) {
832 if (link_netnsid
!= -1)
833 duparg("link-netnsid", *argv
);
834 if (get_integer(&link_netnsid
, *argv
, 0))
835 invarg("Invalid \"link-netnsid\" value\n",
837 addattr32(&req
->n
, sizeof(*req
), IFLA_LINK_NETNSID
,
839 } else if (strcmp(*argv
, "protodown") == 0) {
840 unsigned int proto_down
;
843 if (strcmp(*argv
, "on") == 0)
845 else if (strcmp(*argv
, "off") == 0)
848 return on_off("protodown", *argv
);
849 addattr8(&req
->n
, sizeof(*req
), IFLA_PROTO_DOWN
,
852 if (matches(*argv
, "help") == 0)
855 if (strcmp(*argv
, "dev") == 0)
858 duparg2("dev", *argv
);
859 if (check_ifname(*argv
))
860 invarg("\"dev\" not a valid ifname", *argv
);
862 dev_index
= ll_name_to_index(*dev
);
867 if (dev_index
&& addr_len
) {
868 int halen
= nl_get_ll_addr_len(dev_index
);
870 if (halen
>= 0 && halen
!= addr_len
) {
872 "Invalid address length %d - must be %d bytes\n",
881 static int iplink_modify(int cmd
, unsigned int flags
, int argc
, char **argv
)
889 struct link_util
*lu
= NULL
;
890 struct iplink_req req
= {
891 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
892 .n
.nlmsg_flags
= NLM_F_REQUEST
| flags
,
894 .i
.ifi_family
= preferred_family
,
898 ret
= iplink_parse(argc
, argv
,
899 &req
, &name
, &type
, &link
, &dev
, &group
, &index
);
908 addattr_l(&req
.n
, sizeof(req
), IFLA_GROUP
,
909 &group
, sizeof(group
));
913 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
917 if (flags
& NLM_F_CREATE
) {
919 "group cannot be used when creating devices.\n");
924 addattr32(&req
.n
, sizeof(req
), IFLA_GROUP
, group
);
925 if (rtnl_talk(&rth
, &req
.n
, NULL
) < 0)
931 if (!(flags
& NLM_F_CREATE
)) {
934 "Not enough information: \"dev\" argument is required.\n");
937 if (cmd
== RTM_NEWLINK
&& index
!= -1) {
939 "index can be used only when creating devices.\n");
943 req
.i
.ifi_index
= ll_name_to_index(dev
);
944 if (req
.i
.ifi_index
== 0) {
945 fprintf(stderr
, "Cannot find device \"%s\"\n", dev
);
949 /* Allow "ip link add dev" and "ip link add name" */
956 ifindex
= ll_name_to_index(link
);
958 fprintf(stderr
, "Cannot find device \"%s\"\n",
962 addattr_l(&req
.n
, sizeof(req
), IFLA_LINK
, &ifindex
, 4);
968 req
.i
.ifi_index
= index
;
972 addattr_l(&req
.n
, sizeof(req
),
973 IFLA_IFNAME
, name
, strlen(name
) + 1);
977 struct rtattr
*linkinfo
;
978 char *ulinep
= strchr(type
, '_');
981 linkinfo
= addattr_nest(&req
.n
, sizeof(req
), IFLA_LINKINFO
);
982 addattr_l(&req
.n
, sizeof(req
), IFLA_INFO_KIND
, type
,
985 lu
= get_link_kind(type
);
986 if (ulinep
&& !strcmp(ulinep
, "_slave"))
987 iflatype
= IFLA_INFO_SLAVE_DATA
;
989 iflatype
= IFLA_INFO_DATA
;
992 = addattr_nest(&req
.n
,
993 sizeof(req
), iflatype
);
996 lu
->parse_opt(lu
, argc
, argv
, &req
.n
))
999 addattr_nest_end(&req
.n
, data
);
1001 if (matches(*argv
, "help") == 0)
1004 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
1008 addattr_nest_end(&req
.n
, linkinfo
);
1009 } else if (flags
& NLM_F_CREATE
) {
1011 "Not enough information: \"type\" argument is required\n");
1015 if (rtnl_talk(&rth
, &req
.n
, NULL
) < 0)
1021 int iplink_get(unsigned int flags
, char *name
, __u32 filt_mask
)
1023 struct iplink_req req
= {
1024 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
1025 .n
.nlmsg_flags
= NLM_F_REQUEST
| flags
,
1026 .n
.nlmsg_type
= RTM_GETLINK
,
1027 .i
.ifi_family
= preferred_family
,
1029 struct nlmsghdr
*answer
;
1032 addattr_l(&req
.n
, sizeof(req
),
1033 IFLA_IFNAME
, name
, strlen(name
) + 1);
1035 addattr32(&req
.n
, sizeof(req
), IFLA_EXT_MASK
, filt_mask
);
1037 if (rtnl_talk(&rth
, &req
.n
, &answer
) < 0)
1040 open_json_object(NULL
);
1042 print_linkinfo_brief(NULL
, answer
, stdout
, NULL
);
1044 print_linkinfo(NULL
, answer
, stdout
);
1045 close_json_object();
1051 #if IPLINK_IOCTL_COMPAT
1052 static int get_ctl_fd(void)
1057 fd
= socket(PF_INET
, SOCK_DGRAM
, 0);
1061 fd
= socket(PF_PACKET
, SOCK_DGRAM
, 0);
1064 fd
= socket(PF_INET6
, SOCK_DGRAM
, 0);
1068 perror("Cannot create control socket");
1072 static int do_chflags(const char *dev
, __u32 flags
, __u32 mask
)
1078 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1082 err
= ioctl(fd
, SIOCGIFFLAGS
, &ifr
);
1084 perror("SIOCGIFFLAGS");
1088 if ((ifr
.ifr_flags
^flags
)&mask
) {
1089 ifr
.ifr_flags
&= ~mask
;
1090 ifr
.ifr_flags
|= mask
&flags
;
1091 err
= ioctl(fd
, SIOCSIFFLAGS
, &ifr
);
1093 perror("SIOCSIFFLAGS");
1099 static int do_changename(const char *dev
, const char *newdev
)
1105 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1106 strncpy(ifr
.ifr_newname
, newdev
, IFNAMSIZ
);
1110 err
= ioctl(fd
, SIOCSIFNAME
, &ifr
);
1112 perror("SIOCSIFNAME");
1120 static int set_qlen(const char *dev
, int qlen
)
1122 struct ifreq ifr
= { .ifr_qlen
= qlen
};
1129 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1130 if (ioctl(s
, SIOCSIFTXQLEN
, &ifr
) < 0) {
1131 perror("SIOCSIFXQLEN");
1140 static int set_mtu(const char *dev
, int mtu
)
1142 struct ifreq ifr
= { .ifr_mtu
= mtu
};
1149 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1150 if (ioctl(s
, SIOCSIFMTU
, &ifr
) < 0) {
1151 perror("SIOCSIFMTU");
1160 static int get_address(const char *dev
, int *htype
)
1162 struct ifreq ifr
= {};
1163 struct sockaddr_ll me
= {
1164 .sll_family
= AF_PACKET
,
1165 .sll_protocol
= htons(ETH_P_LOOP
),
1170 s
= socket(PF_PACKET
, SOCK_DGRAM
, 0);
1172 perror("socket(PF_PACKET)");
1176 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1177 if (ioctl(s
, SIOCGIFINDEX
, &ifr
) < 0) {
1178 perror("SIOCGIFINDEX");
1183 me
.sll_ifindex
= ifr
.ifr_ifindex
;
1184 if (bind(s
, (struct sockaddr
*)&me
, sizeof(me
)) == -1) {
1191 if (getsockname(s
, (struct sockaddr
*)&me
, &alen
) == -1) {
1192 perror("getsockname");
1197 *htype
= me
.sll_hatype
;
1198 return me
.sll_halen
;
1201 static int parse_address(const char *dev
, int hatype
, int halen
,
1202 char *lla
, struct ifreq
*ifr
)
1206 memset(ifr
, 0, sizeof(*ifr
));
1207 strncpy(ifr
->ifr_name
, dev
, IFNAMSIZ
);
1208 ifr
->ifr_hwaddr
.sa_family
= hatype
;
1209 alen
= ll_addr_a2n(ifr
->ifr_hwaddr
.sa_data
, 14, lla
);
1212 if (alen
!= halen
) {
1214 "Wrong address (%s) length: expected %d bytes\n",
1221 static int set_address(struct ifreq
*ifr
, int brd
)
1228 if (ioctl(s
, brd
?SIOCSIFHWBROADCAST
:SIOCSIFHWADDR
, ifr
) < 0) {
1229 perror(brd
?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
1237 static int do_set(int argc
, char **argv
)
1244 char *newaddr
= NULL
;
1245 char *newbrd
= NULL
;
1246 struct ifreq ifr0
, ifr1
;
1247 char *newname
= NULL
;
1251 if (strcmp(*argv
, "up") == 0) {
1254 } else if (strcmp(*argv
, "down") == 0) {
1257 } else if (strcmp(*argv
, "name") == 0) {
1259 if (check_ifname(*argv
))
1260 invarg("\"name\" not a valid ifname", *argv
);
1262 } else if (matches(*argv
, "address") == 0) {
1265 } else if (matches(*argv
, "broadcast") == 0 ||
1266 strcmp(*argv
, "brd") == 0) {
1269 } else if (matches(*argv
, "txqueuelen") == 0 ||
1270 strcmp(*argv
, "qlen") == 0 ||
1271 matches(*argv
, "txqlen") == 0) {
1274 duparg("txqueuelen", *argv
);
1275 if (get_integer(&qlen
, *argv
, 0))
1276 invarg("Invalid \"txqueuelen\" value\n", *argv
);
1277 } else if (strcmp(*argv
, "mtu") == 0) {
1280 duparg("mtu", *argv
);
1281 if (get_integer(&mtu
, *argv
, 0))
1282 invarg("Invalid \"mtu\" value\n", *argv
);
1283 } else if (strcmp(*argv
, "multicast") == 0) {
1285 mask
|= IFF_MULTICAST
;
1287 if (strcmp(*argv
, "on") == 0)
1288 flags
|= IFF_MULTICAST
;
1289 else if (strcmp(*argv
, "off") == 0)
1290 flags
&= ~IFF_MULTICAST
;
1292 return on_off("multicast", *argv
);
1293 } else if (strcmp(*argv
, "allmulticast") == 0) {
1295 mask
|= IFF_ALLMULTI
;
1297 if (strcmp(*argv
, "on") == 0)
1298 flags
|= IFF_ALLMULTI
;
1299 else if (strcmp(*argv
, "off") == 0)
1300 flags
&= ~IFF_ALLMULTI
;
1302 return on_off("allmulticast", *argv
);
1303 } else if (strcmp(*argv
, "promisc") == 0) {
1305 mask
|= IFF_PROMISC
;
1307 if (strcmp(*argv
, "on") == 0)
1308 flags
|= IFF_PROMISC
;
1309 else if (strcmp(*argv
, "off") == 0)
1310 flags
&= ~IFF_PROMISC
;
1312 return on_off("promisc", *argv
);
1313 } else if (strcmp(*argv
, "trailers") == 0) {
1315 mask
|= IFF_NOTRAILERS
;
1317 if (strcmp(*argv
, "off") == 0)
1318 flags
|= IFF_NOTRAILERS
;
1319 else if (strcmp(*argv
, "on") == 0)
1320 flags
&= ~IFF_NOTRAILERS
;
1322 return on_off("trailers", *argv
);
1323 } else if (strcmp(*argv
, "arp") == 0) {
1327 if (strcmp(*argv
, "on") == 0)
1328 flags
&= ~IFF_NOARP
;
1329 else if (strcmp(*argv
, "off") == 0)
1332 return on_off("arp", *argv
);
1333 } else if (matches(*argv
, "dynamic") == 0) {
1335 mask
|= IFF_DYNAMIC
;
1337 if (strcmp(*argv
, "on") == 0)
1338 flags
|= IFF_DYNAMIC
;
1339 else if (strcmp(*argv
, "off") == 0)
1340 flags
&= ~IFF_DYNAMIC
;
1342 return on_off("dynamic", *argv
);
1344 if (strcmp(*argv
, "dev") == 0)
1346 else if (matches(*argv
, "help") == 0)
1350 duparg2("dev", *argv
);
1351 if (check_ifname(*argv
))
1352 invarg("\"dev\" not a valid ifname", *argv
);
1360 "Not enough of information: \"dev\" argument is required.\n");
1364 if (newaddr
|| newbrd
) {
1365 halen
= get_address(dev
, &htype
);
1369 if (parse_address(dev
, htype
, halen
,
1370 newaddr
, &ifr0
) < 0)
1374 if (parse_address(dev
, htype
, halen
,
1380 if (newname
&& strcmp(dev
, newname
)) {
1381 if (do_changename(dev
, newname
) < 0)
1386 if (set_qlen(dev
, qlen
) < 0)
1390 if (set_mtu(dev
, mtu
) < 0)
1393 if (newaddr
|| newbrd
) {
1395 if (set_address(&ifr1
, 1) < 0)
1399 if (set_address(&ifr0
, 0) < 0)
1404 return do_chflags(dev
, flags
, mask
);
1407 #endif /* IPLINK_IOCTL_COMPAT */
1409 static void print_mpls_stats(FILE *fp
, struct rtattr
*attr
)
1411 struct rtattr
*mrtb
[MPLS_STATS_MAX
+1];
1412 struct mpls_link_stats
*stats
;
1414 parse_rtattr(mrtb
, MPLS_STATS_MAX
, RTA_DATA(attr
),
1416 if (!mrtb
[MPLS_STATS_LINK
])
1419 stats
= RTA_DATA(mrtb
[MPLS_STATS_LINK
]);
1421 fprintf(fp
, " mpls:\n");
1422 fprintf(fp
, " RX: bytes packets errors dropped noroute\n");
1424 print_num(fp
, 10, stats
->rx_bytes
);
1425 print_num(fp
, 8, stats
->rx_packets
);
1426 print_num(fp
, 7, stats
->rx_errors
);
1427 print_num(fp
, 8, stats
->rx_dropped
);
1428 print_num(fp
, 7, stats
->rx_noroute
);
1430 fprintf(fp
, " TX: bytes packets errors dropped\n");
1432 print_num(fp
, 10, stats
->tx_bytes
);
1433 print_num(fp
, 8, stats
->tx_packets
);
1434 print_num(fp
, 7, stats
->tx_errors
);
1435 print_num(fp
, 7, stats
->tx_dropped
);
1439 static void print_af_stats_attr(FILE *fp
, int ifindex
, struct rtattr
*attr
)
1441 bool if_printed
= false;
1445 rem
= RTA_PAYLOAD(attr
);
1446 for (i
= RTA_DATA(attr
); RTA_OK(i
, rem
); i
= RTA_NEXT(i
, rem
)) {
1447 if (preferred_family
!= AF_UNSPEC
&&
1448 i
->rta_type
!= preferred_family
)
1452 fprintf(fp
, "%u: %s\n", ifindex
,
1453 ll_index_to_name(ifindex
));
1457 switch (i
->rta_type
) {
1459 print_mpls_stats(fp
, i
);
1462 fprintf(fp
, " unknown af(%d)\n", i
->rta_type
);
1468 struct af_stats_ctx
{
1473 static int print_af_stats(const struct sockaddr_nl
*who
,
1477 struct if_stats_msg
*ifsm
= NLMSG_DATA(n
);
1478 struct rtattr
*tb
[IFLA_STATS_MAX
+1];
1479 int len
= n
->nlmsg_len
;
1480 struct af_stats_ctx
*ctx
= arg
;
1483 len
-= NLMSG_LENGTH(sizeof(*ifsm
));
1485 fprintf(stderr
, "BUG: wrong nlmsg len %d\n", len
);
1489 if (ctx
->ifindex
&& ifsm
->ifindex
!= ctx
->ifindex
)
1492 parse_rtattr(tb
, IFLA_STATS_MAX
, IFLA_STATS_RTA(ifsm
), len
);
1494 if (tb
[IFLA_STATS_AF_SPEC
])
1495 print_af_stats_attr(fp
, ifsm
->ifindex
, tb
[IFLA_STATS_AF_SPEC
]);
1501 static int iplink_afstats(int argc
, char **argv
)
1503 __u32 filt_mask
= IFLA_STATS_FILTER_BIT(IFLA_STATS_AF_SPEC
);
1504 const char *filter_dev
= NULL
;
1505 struct af_stats_ctx ctx
= {
1511 if (strcmp(*argv
, "dev") == 0) {
1514 duparg2("dev", *argv
);
1516 } else if (matches(*argv
, "help") == 0) {
1520 "Command \"%s\" is unknown, try \"ip link help\".\n",
1529 ctx
.ifindex
= ll_name_to_index(filter_dev
);
1530 if (ctx
.ifindex
<= 0) {
1532 "Device \"%s\" does not exist.\n",
1538 if (rtnl_wilddump_stats_req_filter(&rth
, AF_UNSPEC
,
1541 perror("Cannont send dump request");
1545 if (rtnl_dump_filter(&rth
, print_af_stats
, &ctx
) < 0) {
1546 fprintf(stderr
, "Dump terminated\n");
1553 static void do_help(int argc
, char **argv
)
1555 struct link_util
*lu
= NULL
;
1562 lu
= get_link_kind(*argv
);
1563 if (lu
&& lu
->print_help
)
1564 lu
->print_help(lu
, argc
-1, argv
+1, stdout
);
1569 int do_iplink(int argc
, char **argv
)
1572 return ipaddr_list_link(0, NULL
);
1574 if (iplink_have_newlink()) {
1575 if (matches(*argv
, "add") == 0)
1576 return iplink_modify(RTM_NEWLINK
,
1577 NLM_F_CREATE
|NLM_F_EXCL
,
1579 if (matches(*argv
, "set") == 0 ||
1580 matches(*argv
, "change") == 0)
1581 return iplink_modify(RTM_NEWLINK
, 0,
1583 if (matches(*argv
, "replace") == 0)
1584 return iplink_modify(RTM_NEWLINK
,
1585 NLM_F_CREATE
|NLM_F_REPLACE
,
1587 if (matches(*argv
, "delete") == 0)
1588 return iplink_modify(RTM_DELLINK
, 0,
1591 #if IPLINK_IOCTL_COMPAT
1592 if (matches(*argv
, "set") == 0)
1593 return do_set(argc
-1, argv
+1);
1597 if (matches(*argv
, "show") == 0 ||
1598 matches(*argv
, "lst") == 0 ||
1599 matches(*argv
, "list") == 0)
1600 return ipaddr_list_link(argc
-1, argv
+1);
1602 if (matches(*argv
, "xstats") == 0)
1603 return iplink_ifla_xstats(argc
-1, argv
+1);
1605 if (matches(*argv
, "afstats") == 0) {
1606 iplink_afstats(argc
-1, argv
+1);
1610 if (matches(*argv
, "help") == 0) {
1611 do_help(argc
-1, argv
+1);
1615 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip link help\".\n",