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kernel / pub / scm / network / iproute2 / iproute2-next / fd4c1c816896919e5a86ee56d2c229ca730fb50e / . / ip / iplink.c
blob: 2fc0443ca587e241b0e3c6a3a2b298a10e91d5dd [file] [log] [blame]
/*
* iplink.c "ip link".
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <errno.h>
#include <sys/socket.h>
#include <linux/if.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h>
#include <linux/sockios.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <sys/ioctl.h>
#include <stdbool.h>
#include <linux/mpls.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "namespace.h"
#define IPLINK_IOCTL_COMPAT 1
#ifndef GSO_MAX_SIZE
#define GSO_MAX_SIZE 65536
#endif
#ifndef GSO_MAX_SEGS
#define GSO_MAX_SEGS 65535
#endif
static void usage(void) __attribute__((noreturn));
static int iplink_have_newlink(void);
void iplink_types_usage(void)
{
/* Remember to add new entry here if new type is added. */
fprintf(stderr,
"TYPE := { bareudp | bond | bond_slave | bridge | bridge_slave |\n"
" dummy | erspan | geneve | gre | gretap | ifb |\n"
" ip6erspan | ip6gre | ip6gretap | ip6tnl |\n"
" ipip | ipoib | ipvlan | ipvtap |\n"
" macsec | macvlan | macvtap |\n"
" netdevsim | nlmon | rmnet | sit | team | team_slave |\n"
" vcan | veth | vlan | vrf | vti | vxcan | vxlan | wwan |\n"
" xfrm }\n");
}
void iplink_usage(void)
{
if (iplink_have_newlink()) {
fprintf(stderr,
"Usage: ip link add [link DEV | parentdev NAME] [ name ] NAME\n"
" [ txqueuelen PACKETS ]\n"
" [ address LLADDR ]\n"
" [ broadcast LLADDR ]\n"
" [ mtu MTU ] [index IDX ]\n"
" [ numtxqueues QUEUE_COUNT ]\n"
" [ numrxqueues QUEUE_COUNT ]\n"
" type TYPE [ ARGS ]\n"
"\n"
" ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n"
"\n"
" ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n"
" [ { up | down } ]\n"
" [ type TYPE ARGS ]\n");
} else
fprintf(stderr,
"Usage: ip link set DEVICE [ { up | down } ]\n");
fprintf(stderr,
" [ arp { on | off } ]\n"
" [ dynamic { on | off } ]\n"
" [ multicast { on | off } ]\n"
" [ allmulticast { on | off } ]\n"
" [ promisc { on | off } ]\n"
" [ trailers { on | off } ]\n"
" [ carrier { on | off } ]\n"
" [ txqueuelen PACKETS ]\n"
" [ name NEWNAME ]\n"
" [ address LLADDR ]\n"
" [ broadcast LLADDR ]\n"
" [ mtu MTU ]\n"
" [ netns { PID | NAME } ]\n"
" [ link-netns NAME | link-netnsid ID ]\n"
" [ alias NAME ]\n"
" [ vf NUM [ mac LLADDR ]\n"
" [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-PROTO ] ]\n"
" [ rate TXRATE ]\n"
" [ max_tx_rate TXRATE ]\n"
" [ min_tx_rate TXRATE ]\n"
" [ spoofchk { on | off} ]\n"
" [ query_rss { on | off} ]\n"
" [ state { auto | enable | disable} ]\n"
" [ trust { on | off} ]\n"
" [ node_guid EUI64 ]\n"
" [ port_guid EUI64 ] ]\n"
" [ { xdp | xdpgeneric | xdpdrv | xdpoffload } { off |\n"
" object FILE [ section NAME ] [ verbose ] |\n"
" pinned FILE } ]\n"
" [ master DEVICE ][ vrf NAME ]\n"
" [ nomaster ]\n"
" [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
" [ protodown { on | off } ]\n"
" [ protodown_reason PREASON { on | off } ]\n"
" [ gso_max_size BYTES ] | [ gso_max_segs PACKETS ]\n"
"\n"
" ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n"
" [nomaster]\n"
"\n"
" ip link xstats type TYPE [ ARGS ]\n"
"\n"
" ip link afstats [ dev DEVICE ]\n"
" ip link property add dev DEVICE [ altname NAME .. ]\n"
" ip link property del dev DEVICE [ altname NAME .. ]\n");
if (iplink_have_newlink()) {
fprintf(stderr,
"\n"
" ip link help [ TYPE ]\n"
"\n");
iplink_types_usage();
}
exit(-1);
}
static void usage(void)
{
iplink_usage();
}
static int on_off(const char *msg, const char *realval)
{
fprintf(stderr,
"Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
msg, realval);
return -1;
}
static void *BODY; /* cached dlopen(NULL) handle */
static struct link_util *linkutil_list;
struct link_util *get_link_kind(const char *id)
{
void *dlh;
char buf[256];
struct link_util *l;
for (l = linkutil_list; l; l = l->next)
if (strcmp(l->id, id) == 0)
return l;
snprintf(buf, sizeof(buf), "%s/link_%s.so", get_ip_lib_dir(), id);
dlh = dlopen(buf, RTLD_LAZY);
if (dlh == NULL) {
/* look in current binary, only open once */
dlh = BODY;
if (dlh == NULL) {
dlh = BODY = dlopen(NULL, RTLD_LAZY);
if (dlh == NULL)
return NULL;
}
}
snprintf(buf, sizeof(buf), "%s_link_util", id);
l = dlsym(dlh, buf);
if (l == NULL)
return NULL;
l->next = linkutil_list;
linkutil_list = l;
return l;
}
static int get_link_mode(const char *mode)
{
if (strcasecmp(mode, "default") == 0)
return IF_LINK_MODE_DEFAULT;
if (strcasecmp(mode, "dormant") == 0)
return IF_LINK_MODE_DORMANT;
return -1;
}
static int get_addr_gen_mode(const char *mode)
{
if (strcasecmp(mode, "eui64") == 0)
return IN6_ADDR_GEN_MODE_EUI64;
if (strcasecmp(mode, "none") == 0)
return IN6_ADDR_GEN_MODE_NONE;
if (strcasecmp(mode, "stable_secret") == 0)
return IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
if (strcasecmp(mode, "random") == 0)
return IN6_ADDR_GEN_MODE_RANDOM;
return -1;
}
#if IPLINK_IOCTL_COMPAT
static int have_rtnl_newlink = -1;
static int accept_msg(struct rtnl_ctrl_data *ctrl,
struct nlmsghdr *n, void *arg)
{
struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n);
if (n->nlmsg_type == NLMSG_ERROR &&
(err->error == -EOPNOTSUPP || err->error == -EINVAL))
have_rtnl_newlink = 0;
else
have_rtnl_newlink = 1;
return -1;
}
static int iplink_have_newlink(void)
{
struct {
struct nlmsghdr n;
struct ifinfomsg i;
char buf[1024];
} req = {
.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
.n.nlmsg_type = RTM_NEWLINK,
.i.ifi_family = AF_UNSPEC,
};
if (have_rtnl_newlink < 0) {
if (rtnl_send(&rth, &req.n, req.n.nlmsg_len) < 0) {
perror("request send failed");
exit(1);
}
rtnl_listen(&rth, accept_msg, NULL);
}
return have_rtnl_newlink;
}
#else /* IPLINK_IOCTL_COMPAT */
static int iplink_have_newlink(void)
{
return 1;
}
#endif /* ! IPLINK_IOCTL_COMPAT */
static int nl_get_ll_addr_len(const char *ifname)
{
int len;
int dev_index = ll_name_to_index(ifname);
struct iplink_req req = {
.n = {
.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.nlmsg_type = RTM_GETLINK,
.nlmsg_flags = NLM_F_REQUEST
},
.i = {
.ifi_family = preferred_family,
.ifi_index = dev_index,
}
};
struct nlmsghdr *answer;
struct rtattr *tb[IFLA_MAX+1];
if (dev_index == 0)
return -1;
if (rtnl_talk(&rth, &req.n, &answer) < 0)
return -1;
len = answer->nlmsg_len - NLMSG_LENGTH(sizeof(struct ifinfomsg));
if (len < 0) {
free(answer);
return -1;
}
parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)),
len, NLA_F_NESTED);
if (!tb[IFLA_ADDRESS]) {
free(answer);
return -1;
}
len = RTA_PAYLOAD(tb[IFLA_ADDRESS]);
free(answer);
return len;
}
static void iplink_parse_vf_vlan_info(int vf, int *argcp, char ***argvp,
struct ifla_vf_vlan_info *ivvip)
{
int argc = *argcp;
char **argv = *argvp;
unsigned int vci;
NEXT_ARG();
if (get_unsigned(&vci, *argv, 0) || vci > 4095)
invarg("Invalid \"vlan\" value\n", *argv);
ivvip->vlan = vci;
ivvip->vf = vf;
ivvip->qos = 0;
ivvip->vlan_proto = htons(ETH_P_8021Q);
if (NEXT_ARG_OK()) {
NEXT_ARG();
if (matches(*argv, "qos") == 0) {
NEXT_ARG();
if (get_unsigned(&ivvip->qos, *argv, 0))
invarg("Invalid \"qos\" value\n", *argv);
} else {
/* rewind arg */
PREV_ARG();
}
}
if (NEXT_ARG_OK()) {
NEXT_ARG();
if (matches(*argv, "proto") == 0) {
NEXT_ARG();
if (ll_proto_a2n(&ivvip->vlan_proto, *argv))
invarg("protocol is invalid\n", *argv);
if (ivvip->vlan_proto != htons(ETH_P_8021AD) &&
ivvip->vlan_proto != htons(ETH_P_8021Q)) {
SPRINT_BUF(b1);
SPRINT_BUF(b2);
char msg[64 + sizeof(b1) + sizeof(b2)];
sprintf(msg,
"Invalid \"vlan protocol\" value - supported %s, %s\n",
ll_proto_n2a(htons(ETH_P_8021Q),
b1, sizeof(b1)),
ll_proto_n2a(htons(ETH_P_8021AD),
b2, sizeof(b2)));
invarg(msg, *argv);
}
} else {
/* rewind arg */
PREV_ARG();
}
}
*argcp = argc;
*argvp = argv;
}
static int iplink_parse_vf(int vf, int *argcp, char ***argvp,
struct iplink_req *req, const char *dev)
{
char new_rate_api = 0, count = 0, override_legacy_rate = 0;
struct ifla_vf_rate tivt;
int len, argc = *argcp;
char **argv = *argvp;
struct rtattr *vfinfo;
int ret;
tivt.min_tx_rate = -1;
tivt.max_tx_rate = -1;
vfinfo = addattr_nest(&req->n, sizeof(*req), IFLA_VF_INFO);
while (NEXT_ARG_OK()) {
NEXT_ARG();
count++;
if (!matches(*argv, "max_tx_rate")) {
/* new API in use */
new_rate_api = 1;
/* override legacy rate */
override_legacy_rate = 1;
} else if (!matches(*argv, "min_tx_rate")) {
/* new API in use */
new_rate_api = 1;
}
}
while (count--) {
/* rewind arg */
PREV_ARG();
}
while (NEXT_ARG_OK()) {
NEXT_ARG();
if (matches(*argv, "mac") == 0) {
struct ifla_vf_mac ivm = { 0 };
int halen = nl_get_ll_addr_len(dev);
NEXT_ARG();
ivm.vf = vf;
len = ll_addr_a2n((char *)ivm.mac, 32, *argv);
if (len < 0)
return -1;
if (halen > 0 && len != halen) {
fprintf(stderr,
"Invalid address length %d - must be %d bytes\n",
len, halen);
return -1;
}
addattr_l(&req->n, sizeof(*req), IFLA_VF_MAC,
&ivm, sizeof(ivm));
} else if (matches(*argv, "vlan") == 0) {
struct ifla_vf_vlan_info ivvi;
iplink_parse_vf_vlan_info(vf, &argc, &argv, &ivvi);
/* support the old interface in case of older kernel*/
if (ivvi.vlan_proto == htons(ETH_P_8021Q)) {
struct ifla_vf_vlan ivv;
ivv.vf = ivvi.vf;
ivv.vlan = ivvi.vlan;
ivv.qos = ivvi.qos;
addattr_l(&req->n, sizeof(*req),
IFLA_VF_VLAN, &ivv, sizeof(ivv));
} else {
struct rtattr *vfvlanlist;
vfvlanlist = addattr_nest(&req->n, sizeof(*req),
IFLA_VF_VLAN_LIST);
addattr_l(&req->n, sizeof(*req),
IFLA_VF_VLAN_INFO, &ivvi,
sizeof(ivvi));
while (NEXT_ARG_OK()) {
NEXT_ARG();
if (matches(*argv, "vlan") != 0) {
PREV_ARG();
break;
}
iplink_parse_vf_vlan_info(vf, &argc,
&argv, &ivvi);
addattr_l(&req->n, sizeof(*req),
IFLA_VF_VLAN_INFO, &ivvi,
sizeof(ivvi));
}
addattr_nest_end(&req->n, vfvlanlist);
}
} else if (matches(*argv, "rate") == 0) {
struct ifla_vf_tx_rate ivt;
NEXT_ARG();
if (get_unsigned(&ivt.rate, *argv, 0))
invarg("Invalid \"rate\" value\n", *argv);
ivt.vf = vf;
if (!new_rate_api)
addattr_l(&req->n, sizeof(*req),
IFLA_VF_TX_RATE, &ivt, sizeof(ivt));
else if (!override_legacy_rate)
tivt.max_tx_rate = ivt.rate;
} else if (matches(*argv, "max_tx_rate") == 0) {
NEXT_ARG();
if (get_unsigned(&tivt.max_tx_rate, *argv, 0))
invarg("Invalid \"max tx rate\" value\n",
*argv);
tivt.vf = vf;
} else if (matches(*argv, "min_tx_rate") == 0) {
NEXT_ARG();
if (get_unsigned(&tivt.min_tx_rate, *argv, 0))
invarg("Invalid \"min tx rate\" value\n",
*argv);
tivt.vf = vf;
} else if (matches(*argv, "spoofchk") == 0) {
struct ifla_vf_spoofchk ivs;
NEXT_ARG();
ivs.setting = parse_on_off("spoofchk", *argv, &ret);
if (ret)
return ret;
ivs.vf = vf;
addattr_l(&req->n, sizeof(*req), IFLA_VF_SPOOFCHK,
&ivs, sizeof(ivs));
} else if (matches(*argv, "query_rss") == 0) {
struct ifla_vf_rss_query_en ivs;
NEXT_ARG();
ivs.setting = parse_on_off("query_rss", *argv, &ret);
if (ret)
return ret;
ivs.vf = vf;
addattr_l(&req->n, sizeof(*req), IFLA_VF_RSS_QUERY_EN,
&ivs, sizeof(ivs));
} else if (matches(*argv, "trust") == 0) {
struct ifla_vf_trust ivt;
NEXT_ARG();
ivt.setting = parse_on_off("trust", *argv, &ret);
if (ret)
return ret;
ivt.vf = vf;
addattr_l(&req->n, sizeof(*req), IFLA_VF_TRUST,
&ivt, sizeof(ivt));
} else if (matches(*argv, "state") == 0) {
struct ifla_vf_link_state ivl;
NEXT_ARG();
if (matches(*argv, "auto") == 0)
ivl.link_state = IFLA_VF_LINK_STATE_AUTO;
else if (matches(*argv, "enable") == 0)
ivl.link_state = IFLA_VF_LINK_STATE_ENABLE;
else if (matches(*argv, "disable") == 0)
ivl.link_state = IFLA_VF_LINK_STATE_DISABLE;
else
invarg("Invalid \"state\" value\n", *argv);
ivl.vf = vf;
addattr_l(&req->n, sizeof(*req), IFLA_VF_LINK_STATE,
&ivl, sizeof(ivl));
} else if (matches(*argv, "node_guid") == 0) {
struct ifla_vf_guid ivg;
NEXT_ARG();
ivg.vf = vf;
if (get_guid(&ivg.guid, *argv)) {
invarg("Invalid GUID format\n", *argv);
return -1;
}
addattr_l(&req->n, sizeof(*req), IFLA_VF_IB_NODE_GUID,
&ivg, sizeof(ivg));
} else if (matches(*argv, "port_guid") == 0) {
struct ifla_vf_guid ivg;
NEXT_ARG();
ivg.vf = vf;
if (get_guid(&ivg.guid, *argv)) {
invarg("Invalid GUID format\n", *argv);
return -1;
}
addattr_l(&req->n, sizeof(*req), IFLA_VF_IB_PORT_GUID,
&ivg, sizeof(ivg));
} else {
/* rewind arg */
PREV_ARG();
break;
}
}
if (new_rate_api) {
int tmin, tmax;
if (tivt.min_tx_rate == -1 || tivt.max_tx_rate == -1) {
ipaddr_get_vf_rate(tivt.vf, &tmin, &tmax, dev);
if (tivt.min_tx_rate == -1)
tivt.min_tx_rate = tmin;
if (tivt.max_tx_rate == -1)
tivt.max_tx_rate = tmax;
}
if (tivt.max_tx_rate && tivt.min_tx_rate > tivt.max_tx_rate) {
fprintf(stderr,
"Invalid min_tx_rate %d - must be <= max_tx_rate %d\n",
tivt.min_tx_rate, tivt.max_tx_rate);
return -1;
}
addattr_l(&req->n, sizeof(*req), IFLA_VF_RATE, &tivt,
sizeof(tivt));
}
if (argc == *argcp)
incomplete_command();
addattr_nest_end(&req->n, vfinfo);
*argcp = argc;
*argvp = argv;
return 0;
}
int iplink_parse(int argc, char **argv, struct iplink_req *req, char **type)
{
char *name = NULL;
char *dev = NULL;
char *link = NULL;
int ret, len;
char abuf[32];
int qlen = -1;
int mtu = -1;
int netns = -1;
int vf = -1;
int numtxqueues = -1;
int numrxqueues = -1;
int link_netnsid = -1;
int index = 0;
int group = -1;
int addr_len = 0;
int err;
ret = argc;
while (argc > 0) {
if (strcmp(*argv, "up") == 0) {
req->i.ifi_change |= IFF_UP;
req->i.ifi_flags |= IFF_UP;
} else if (strcmp(*argv, "down") == 0) {
req->i.ifi_change |= IFF_UP;
req->i.ifi_flags &= ~IFF_UP;
} else if (strcmp(*argv, "name") == 0) {
NEXT_ARG();
if (name)
duparg("name", *argv);
if (check_ifname(*argv))
invarg("\"name\" not a valid ifname", *argv);
name = *argv;
if (!dev)
dev = name;
} else if (strcmp(*argv, "index") == 0) {
NEXT_ARG();
if (index)
duparg("index", *argv);
index = atoi(*argv);
if (index <= 0)
invarg("Invalid \"index\" value", *argv);
} else if (matches(*argv, "link") == 0) {
NEXT_ARG();
link = *argv;
} else if (matches(*argv, "address") == 0) {
NEXT_ARG();
addr_len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
if (addr_len < 0)
return -1;
addattr_l(&req->n, sizeof(*req),
IFLA_ADDRESS, abuf, addr_len);
} else if (matches(*argv, "broadcast") == 0 ||
strcmp(*argv, "brd") == 0) {
NEXT_ARG();
len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
if (len < 0)
return -1;
addattr_l(&req->n, sizeof(*req),
IFLA_BROADCAST, abuf, len);
} else if (matches(*argv, "txqueuelen") == 0 ||
strcmp(*argv, "qlen") == 0 ||
matches(*argv, "txqlen") == 0) {
NEXT_ARG();
if (qlen != -1)
duparg("txqueuelen", *argv);
if (get_integer(&qlen, *argv, 0))
invarg("Invalid \"txqueuelen\" value\n", *argv);
addattr_l(&req->n, sizeof(*req),
IFLA_TXQLEN, &qlen, 4);
} else if (strcmp(*argv, "mtu") == 0) {
NEXT_ARG();
if (mtu != -1)
duparg("mtu", *argv);
if (get_integer(&mtu, *argv, 0))
invarg("Invalid \"mtu\" value\n", *argv);
addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4);
} else if (strcmp(*argv, "xdpgeneric") == 0 ||
strcmp(*argv, "xdpdrv") == 0 ||
strcmp(*argv, "xdpoffload") == 0 ||
strcmp(*argv, "xdp") == 0) {
bool generic = strcmp(*argv, "xdpgeneric") == 0;
bool drv = strcmp(*argv, "xdpdrv") == 0;
bool offload = strcmp(*argv, "xdpoffload") == 0;
NEXT_ARG();
if (xdp_parse(&argc, &argv, req, dev,
generic, drv, offload))
exit(-1);
if (offload && name == dev)
dev = NULL;
} else if (strcmp(*argv, "netns") == 0) {
NEXT_ARG();
if (netns != -1)
duparg("netns", *argv);
netns = netns_get_fd(*argv);
if (netns >= 0)
addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_FD,
&netns, 4);
else if (get_integer(&netns, *argv, 0) == 0)
addattr_l(&req->n, sizeof(*req),
IFLA_NET_NS_PID, &netns, 4);
else
invarg("Invalid \"netns\" value\n", *argv);
} else if (strcmp(*argv, "multicast") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_MULTICAST;
if (strcmp(*argv, "on") == 0)
req->i.ifi_flags |= IFF_MULTICAST;
else if (strcmp(*argv, "off") == 0)
req->i.ifi_flags &= ~IFF_MULTICAST;
else
return on_off("multicast", *argv);
} else if (strcmp(*argv, "allmulticast") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_ALLMULTI;
if (strcmp(*argv, "on") == 0)
req->i.ifi_flags |= IFF_ALLMULTI;
else if (strcmp(*argv, "off") == 0)
req->i.ifi_flags &= ~IFF_ALLMULTI;
else
return on_off("allmulticast", *argv);
} else if (strcmp(*argv, "promisc") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_PROMISC;
if (strcmp(*argv, "on") == 0)
req->i.ifi_flags |= IFF_PROMISC;
else if (strcmp(*argv, "off") == 0)
req->i.ifi_flags &= ~IFF_PROMISC;
else
return on_off("promisc", *argv);
} else if (strcmp(*argv, "trailers") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_NOTRAILERS;
if (strcmp(*argv, "off") == 0)
req->i.ifi_flags |= IFF_NOTRAILERS;
else if (strcmp(*argv, "on") == 0)
req->i.ifi_flags &= ~IFF_NOTRAILERS;
else
return on_off("trailers", *argv);
} else if (strcmp(*argv, "arp") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_NOARP;
if (strcmp(*argv, "on") == 0)
req->i.ifi_flags &= ~IFF_NOARP;
else if (strcmp(*argv, "off") == 0)
req->i.ifi_flags |= IFF_NOARP;
else
return on_off("arp", *argv);
} else if (strcmp(*argv, "carrier") == 0) {
int carrier;
NEXT_ARG();
carrier = parse_on_off("carrier", *argv, &err);
if (err)
return err;
addattr8(&req->n, sizeof(*req), IFLA_CARRIER, carrier);
} else if (strcmp(*argv, "vf") == 0) {
struct rtattr *vflist;
NEXT_ARG();
if (get_integer(&vf, *argv, 0))
invarg("Invalid \"vf\" value\n", *argv);
vflist = addattr_nest(&req->n, sizeof(*req),
IFLA_VFINFO_LIST);
if (!dev)
missarg("dev");
len = iplink_parse_vf(vf, &argc, &argv, req, dev);
if (len < 0)
return -1;
addattr_nest_end(&req->n, vflist);
if (name == dev)
dev = NULL;
} else if (matches(*argv, "master") == 0) {
int ifindex;
NEXT_ARG();
ifindex = ll_name_to_index(*argv);
if (!ifindex)
invarg("Device does not exist\n", *argv);
addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
&ifindex, 4);
} else if (strcmp(*argv, "vrf") == 0) {
int ifindex;
NEXT_ARG();
ifindex = ll_name_to_index(*argv);
if (!ifindex)
invarg("Not a valid VRF name\n", *argv);
if (!name_is_vrf(*argv))
invarg("Not a valid VRF name\n", *argv);
addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
&ifindex, sizeof(ifindex));
} else if (matches(*argv, "nomaster") == 0) {
int ifindex = 0;
addattr_l(&req->n, sizeof(*req), IFLA_MASTER,
&ifindex, 4);
} else if (matches(*argv, "dynamic") == 0) {
NEXT_ARG();
req->i.ifi_change |= IFF_DYNAMIC;
if (strcmp(*argv, "on") == 0)
req->i.ifi_flags |= IFF_DYNAMIC;
else if (strcmp(*argv, "off") == 0)
req->i.ifi_flags &= ~IFF_DYNAMIC;
else
return on_off("dynamic", *argv);
} else if (matches(*argv, "type") == 0) {
NEXT_ARG();
*type = *argv;
argc--; argv++;
break;
} else if (matches(*argv, "alias") == 0) {
NEXT_ARG();
len = strlen(*argv);
if (len >= IFALIASZ)
invarg("alias too long\n", *argv);
addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
*argv, len);
} else if (strcmp(*argv, "group") == 0) {
NEXT_ARG();
if (group != -1)
duparg("group", *argv);
if (rtnl_group_a2n(&group, *argv))
invarg("Invalid \"group\" value\n", *argv);
addattr32(&req->n, sizeof(*req), IFLA_GROUP, group);
} else if (strcmp(*argv, "mode") == 0) {
int mode;
NEXT_ARG();
mode = get_link_mode(*argv);
if (mode < 0)
invarg("Invalid link mode\n", *argv);
addattr8(&req->n, sizeof(*req), IFLA_LINKMODE, mode);
} else if (strcmp(*argv, "state") == 0) {
int state;
NEXT_ARG();
state = get_operstate(*argv);
if (state < 0)
invarg("Invalid operstate\n", *argv);
addattr8(&req->n, sizeof(*req), IFLA_OPERSTATE, state);
} else if (matches(*argv, "numtxqueues") == 0) {
NEXT_ARG();
if (numtxqueues != -1)
duparg("numtxqueues", *argv);
if (get_integer(&numtxqueues, *argv, 0))
invarg("Invalid \"numtxqueues\" value\n",
*argv);
addattr_l(&req->n, sizeof(*req), IFLA_NUM_TX_QUEUES,
&numtxqueues, 4);
} else if (matches(*argv, "numrxqueues") == 0) {
NEXT_ARG();
if (numrxqueues != -1)
duparg("numrxqueues", *argv);
if (get_integer(&numrxqueues, *argv, 0))
invarg("Invalid \"numrxqueues\" value\n",
*argv);
addattr_l(&req->n, sizeof(*req), IFLA_NUM_RX_QUEUES,
&numrxqueues, 4);
} else if (matches(*argv, "addrgenmode") == 0) {
struct rtattr *afs, *afs6;
int mode;
NEXT_ARG();
mode = get_addr_gen_mode(*argv);
if (mode < 0)
invarg("Invalid address generation mode\n",
*argv);
afs = addattr_nest(&req->n, sizeof(*req), IFLA_AF_SPEC);
afs6 = addattr_nest(&req->n, sizeof(*req), AF_INET6);
addattr8(&req->n, sizeof(*req),
IFLA_INET6_ADDR_GEN_MODE, mode);
addattr_nest_end(&req->n, afs6);
addattr_nest_end(&req->n, afs);
} else if (matches(*argv, "link-netns") == 0) {
NEXT_ARG();
if (link_netnsid != -1)
duparg("link-netns/link-netnsid", *argv);
link_netnsid = get_netnsid_from_name(*argv);
/* No nsid? Try to assign one. */
if (link_netnsid < 0)
set_netnsid_from_name(*argv, -1);
link_netnsid = get_netnsid_from_name(*argv);
if (link_netnsid < 0)
invarg("Invalid \"link-netns\" value\n",
*argv);
addattr32(&req->n, sizeof(*req), IFLA_LINK_NETNSID,
link_netnsid);
} else if (matches(*argv, "link-netnsid") == 0) {
NEXT_ARG();
if (link_netnsid != -1)
duparg("link-netns/link-netnsid", *argv);
if (get_integer(&link_netnsid, *argv, 0))
invarg("Invalid \"link-netnsid\" value\n",
*argv);
addattr32(&req->n, sizeof(*req), IFLA_LINK_NETNSID,
link_netnsid);
} else if (strcmp(*argv, "protodown") == 0) {
unsigned int proto_down;
NEXT_ARG();
proto_down = parse_on_off("protodown", *argv, &err);
if (err)
return err;
addattr8(&req->n, sizeof(*req), IFLA_PROTO_DOWN,
proto_down);
} else if (strcmp(*argv, "protodown_reason") == 0) {
struct rtattr *pr;
__u32 preason = 0, prvalue = 0, prmask = 0;
NEXT_ARG();
if (protodown_reason_a2n(&preason, *argv))
invarg("invalid protodown reason\n", *argv);
NEXT_ARG();
prmask = 1 << preason;
if (matches(*argv, "on") == 0)
prvalue |= prmask;
else if (matches(*argv, "off") == 0)
prvalue &= ~prmask;
else
return on_off("protodown_reason", *argv);
pr = addattr_nest(&req->n, sizeof(*req),
IFLA_PROTO_DOWN_REASON | NLA_F_NESTED);
addattr32(&req->n, sizeof(*req),
IFLA_PROTO_DOWN_REASON_MASK, prmask);
addattr32(&req->n, sizeof(*req),
IFLA_PROTO_DOWN_REASON_VALUE, prvalue);
addattr_nest_end(&req->n, pr);
} else if (strcmp(*argv, "gso_max_size") == 0) {
unsigned int max_size;
NEXT_ARG();
if (get_unsigned(&max_size, *argv, 0) ||
max_size > GSO_MAX_SIZE)
invarg("Invalid \"gso_max_size\" value\n",
*argv);
addattr32(&req->n, sizeof(*req),
IFLA_GSO_MAX_SIZE, max_size);
} else if (strcmp(*argv, "gso_max_segs") == 0) {
unsigned int max_segs;
NEXT_ARG();
if (get_unsigned(&max_segs, *argv, 0) ||
max_segs > GSO_MAX_SEGS)
invarg("Invalid \"gso_max_segs\" value\n",
*argv);
addattr32(&req->n, sizeof(*req),
IFLA_GSO_MAX_SEGS, max_segs);
} else if (strcmp(*argv, "parentdev") == 0) {
NEXT_ARG();
addattr_l(&req->n, sizeof(*req), IFLA_PARENT_DEV_NAME,
*argv, strlen(*argv) + 1);
} else {
if (matches(*argv, "help") == 0)
usage();
if (strcmp(*argv, "dev") == 0)
NEXT_ARG();
if (dev != name)
duparg2("dev", *argv);
if (check_altifname(*argv))
invarg("\"dev\" not a valid ifname", *argv);
dev = *argv;
}
argc--; argv++;
}
ret -= argc;
/* Allow "ip link add dev" and "ip link add name" */
if (!name)
name = dev;
else if (!dev)
dev = name;
else if (!strcmp(name, dev))
name = dev;
if (dev && addr_len &&
!(req->n.nlmsg_flags & NLM_F_CREATE)) {
int halen = nl_get_ll_addr_len(dev);
if (halen >= 0 && halen != addr_len) {
fprintf(stderr,
"Invalid address length %d - must be %d bytes\n",
addr_len, halen);
return -1;
}
}
if (!(req->n.nlmsg_flags & NLM_F_CREATE) && index) {
fprintf(stderr,
"index can be used only when creating devices.\n");
exit(-1);
}
if (group != -1) {
if (!dev) {
if (argc) {
fprintf(stderr,
"Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
*argv);
exit(-1);
}
if (req->n.nlmsg_flags & NLM_F_CREATE) {
fprintf(stderr,
"group cannot be used when creating devices.\n");
exit(-1);
}
*type = NULL;
return ret;
}
}
if (!(req->n.nlmsg_flags & NLM_F_CREATE)) {
if (!dev) {
fprintf(stderr,
"Not enough information: \"dev\" argument is required.\n");
exit(-1);
}
req->i.ifi_index = ll_name_to_index(dev);
if (!req->i.ifi_index)
return nodev(dev);
/* Not renaming to the same name */
if (name == dev)
name = NULL;
} else {
if (name != dev) {
fprintf(stderr,
"both \"name\" and \"dev\" cannot be used when creating devices.\n");
exit(-1);
}
if (link) {
int ifindex;
ifindex = ll_name_to_index(link);
if (!ifindex)
return nodev(link);
addattr32(&req->n, sizeof(*req), IFLA_LINK, ifindex);
}
req->i.ifi_index = index;
}
if (name) {
addattr_l(&req->n, sizeof(*req),
IFLA_IFNAME, name, strlen(name) + 1);
}
return ret;
}
static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
{
char *type = NULL;
struct iplink_req req = {
.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.n.nlmsg_flags = NLM_F_REQUEST | flags,
.n.nlmsg_type = cmd,
.i.ifi_family = preferred_family,
};
int ret;
ret = iplink_parse(argc, argv, &req, &type);
if (ret < 0)
return ret;
if (type) {
struct link_util *lu;
struct rtattr *linkinfo;
char *ulinep = strchr(type, '_');
int iflatype;
linkinfo = addattr_nest(&req.n, sizeof(req), IFLA_LINKINFO);
addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
strlen(type));
lu = get_link_kind(type);
if (ulinep && !strcmp(ulinep, "_slave"))
iflatype = IFLA_INFO_SLAVE_DATA;
else
iflatype = IFLA_INFO_DATA;
argc -= ret;
argv += ret;
if (lu && argc) {
struct rtattr *data;
data = addattr_nest(&req.n, sizeof(req), iflatype);
if (lu->parse_opt &&
lu->parse_opt(lu, argc, argv, &req.n))
return -1;
addattr_nest_end(&req.n, data);
} else if (argc) {
if (matches(*argv, "help") == 0)
usage();
fprintf(stderr,
"Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
*argv);
return -1;
}
addattr_nest_end(&req.n, linkinfo);
} else if (flags & NLM_F_CREATE) {
fprintf(stderr,
"Not enough information: \"type\" argument is required\n");
return -1;
}
if (rtnl_talk(&rth, &req.n, NULL) < 0)
return -2;
/* remove device from cache; next use can refresh with new data */
ll_drop_by_index(req.i.ifi_index);
return 0;
}
int iplink_get(char *name, __u32 filt_mask)
{
struct iplink_req req = {
.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.n.nlmsg_flags = NLM_F_REQUEST,
.n.nlmsg_type = RTM_GETLINK,
.i.ifi_family = preferred_family,
};
struct nlmsghdr *answer;
if (name) {
addattr_l(&req.n, sizeof(req),
!check_ifname(name) ? IFLA_IFNAME : IFLA_ALT_IFNAME,
name, strlen(name) + 1);
}
addattr32(&req.n, sizeof(req), IFLA_EXT_MASK, filt_mask);
if (rtnl_talk(&rth, &req.n, &answer) < 0)
return -2;
open_json_object(NULL);
print_linkinfo(answer, stdout);
close_json_object();
free(answer);
return 0;
}
#if IPLINK_IOCTL_COMPAT
static int get_ctl_fd(void)
{
int s_errno;
int fd;
fd = socket(PF_INET, SOCK_DGRAM, 0);
if (fd >= 0)
return fd;
s_errno = errno;
fd = socket(PF_PACKET, SOCK_DGRAM, 0);
if (fd >= 0)
return fd;
fd = socket(PF_INET6, SOCK_DGRAM, 0);
if (fd >= 0)
return fd;
errno = s_errno;
perror("Cannot create control socket");
return -1;
}
static int do_chflags(const char *dev, __u32 flags, __u32 mask)
{
struct ifreq ifr;
int fd;
int err;
strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
fd = get_ctl_fd();
if (fd < 0)
return -1;
err = ioctl(fd, SIOCGIFFLAGS, &ifr);
if (err) {
perror("SIOCGIFFLAGS");
close(fd);
return -1;
}
if ((ifr.ifr_flags^flags)&mask) {
ifr.ifr_flags &= ~mask;
ifr.ifr_flags |= mask&flags;
err = ioctl(fd, SIOCSIFFLAGS, &ifr);
if (err)
perror("SIOCSIFFLAGS");
}
close(fd);
return err;
}
static int do_changename(const char *dev, const char *newdev)
{
struct ifreq ifr;
int fd;
int err;
strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
strlcpy(ifr.ifr_newname, newdev, IFNAMSIZ);
fd = get_ctl_fd();
if (fd < 0)
return -1;
err = ioctl(fd, SIOCSIFNAME, &ifr);
if (err) {
perror("SIOCSIFNAME");
close(fd);
return -1;
}
close(fd);
return err;
}
static int set_qlen(const char *dev, int qlen)
{
struct ifreq ifr = { .ifr_qlen = qlen };
int s;
s = get_ctl_fd();
if (s < 0)
return -1;
strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) {
perror("SIOCSIFXQLEN");
close(s);
return -1;
}
close(s);
return 0;
}
static int set_mtu(const char *dev, int mtu)
{
struct ifreq ifr = { .ifr_mtu = mtu };
int s;
s = get_ctl_fd();
if (s < 0)
return -1;
strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
if (ioctl(s, SIOCSIFMTU, &ifr) < 0) {
perror("SIOCSIFMTU");
close(s);
return -1;
}
close(s);
return 0;
}
static int get_address(const char *dev, int *htype)
{
struct ifreq ifr = {};
struct sockaddr_ll me = {
.sll_family = AF_PACKET,
.sll_protocol = htons(ETH_P_LOOP),
};
socklen_t alen;
int s;
s = socket(PF_PACKET, SOCK_DGRAM, 0);
if (s < 0) {
perror("socket(PF_PACKET)");
return -1;
}
strlcpy(ifr.ifr_name, dev, IFNAMSIZ);
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
perror("SIOCGIFINDEX");
close(s);
return -1;
}
me.sll_ifindex = ifr.ifr_ifindex;
if (bind(s, (struct sockaddr *)&me, sizeof(me)) == -1) {
perror("bind");
close(s);
return -1;
}
alen = sizeof(me);
if (getsockname(s, (struct sockaddr *)&me, &alen) == -1) {
perror("getsockname");
close(s);
return -1;
}
close(s);
*htype = me.sll_hatype;
return me.sll_halen;
}
static int parse_address(const char *dev, int hatype, int halen,
char *lla, struct ifreq *ifr)
{
int alen;
memset(ifr, 0, sizeof(*ifr));
strlcpy(ifr->ifr_name, dev, IFNAMSIZ);
ifr->ifr_hwaddr.sa_family = hatype;
alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla);
if (alen < 0)
return -1;
if (alen != halen) {
fprintf(stderr,
"Wrong address (%s) length: expected %d bytes\n",
lla, halen);
return -1;
}
return 0;
}
static int set_address(struct ifreq *ifr, int brd)
{
int s;
s = get_ctl_fd();
if (s < 0)
return -1;
if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) {
perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
close(s);
return -1;
}
close(s);
return 0;
}
static int do_set(int argc, char **argv)
{
char *dev = NULL;
__u32 mask = 0;
__u32 flags = 0;
int qlen = -1;
int mtu = -1;
char *newaddr = NULL;
char *newbrd = NULL;
struct ifreq ifr0, ifr1;
char *newname = NULL;
int htype, halen;
while (argc > 0) {
if (strcmp(*argv, "up") == 0) {
mask |= IFF_UP;
flags |= IFF_UP;
} else if (strcmp(*argv, "down") == 0) {
mask |= IFF_UP;
flags &= ~IFF_UP;
} else if (strcmp(*argv, "name") == 0) {
NEXT_ARG();
if (check_ifname(*argv))
invarg("\"name\" not a valid ifname", *argv);
newname = *argv;
} else if (matches(*argv, "address") == 0) {
NEXT_ARG();
newaddr = *argv;
} else if (matches(*argv, "broadcast") == 0 ||
strcmp(*argv, "brd") == 0) {
NEXT_ARG();
newbrd = *argv;
} else if (matches(*argv, "txqueuelen") == 0 ||
strcmp(*argv, "qlen") == 0 ||
matches(*argv, "txqlen") == 0) {
NEXT_ARG();
if (qlen != -1)
duparg("txqueuelen", *argv);
if (get_integer(&qlen, *argv, 0))
invarg("Invalid \"txqueuelen\" value\n", *argv);
} else if (strcmp(*argv, "mtu") == 0) {
NEXT_ARG();
if (mtu != -1)
duparg("mtu", *argv);
if (get_integer(&mtu, *argv, 0))
invarg("Invalid \"mtu\" value\n", *argv);
} else if (strcmp(*argv, "multicast") == 0) {
NEXT_ARG();
mask |= IFF_MULTICAST;
if (strcmp(*argv, "on") == 0)
flags |= IFF_MULTICAST;
else if (strcmp(*argv, "off") == 0)
flags &= ~IFF_MULTICAST;
else
return on_off("multicast", *argv);
} else if (strcmp(*argv, "allmulticast") == 0) {
NEXT_ARG();
mask |= IFF_ALLMULTI;
if (strcmp(*argv, "on") == 0)
flags |= IFF_ALLMULTI;
else if (strcmp(*argv, "off") == 0)
flags &= ~IFF_ALLMULTI;
else
return on_off("allmulticast", *argv);
} else if (strcmp(*argv, "promisc") == 0) {
NEXT_ARG();
mask |= IFF_PROMISC;
if (strcmp(*argv, "on") == 0)
flags |= IFF_PROMISC;
else if (strcmp(*argv, "off") == 0)
flags &= ~IFF_PROMISC;
else
return on_off("promisc", *argv);
} else if (strcmp(*argv, "trailers") == 0) {
NEXT_ARG();
mask |= IFF_NOTRAILERS;
if (strcmp(*argv, "off") == 0)
flags |= IFF_NOTRAILERS;
else if (strcmp(*argv, "on") == 0)
flags &= ~IFF_NOTRAILERS;
else
return on_off("trailers", *argv);
} else if (strcmp(*argv, "arp") == 0) {
NEXT_ARG();
mask |= IFF_NOARP;
if (strcmp(*argv, "on") == 0)
flags &= ~IFF_NOARP;
else if (strcmp(*argv, "off") == 0)
flags |= IFF_NOARP;
else
return on_off("arp", *argv);
} else if (matches(*argv, "dynamic") == 0) {
NEXT_ARG();
mask |= IFF_DYNAMIC;
if (strcmp(*argv, "on") == 0)
flags |= IFF_DYNAMIC;
else if (strcmp(*argv, "off") == 0)
flags &= ~IFF_DYNAMIC;
else
return on_off("dynamic", *argv);
} else {
if (strcmp(*argv, "dev") == 0)
NEXT_ARG();
else if (matches(*argv, "help") == 0)
usage();
if (dev)
duparg2("dev", *argv);
if (check_ifname(*argv))
invarg("\"dev\" not a valid ifname", *argv);
dev = *argv;
}
argc--; argv++;
}
if (!dev) {
fprintf(stderr,
"Not enough of information: \"dev\" argument is required.\n");
exit(-1);
}
if (newaddr || newbrd) {
halen = get_address(dev, &htype);
if (halen < 0)
return -1;
if (newaddr) {
if (parse_address(dev, htype, halen,
newaddr, &ifr0) < 0)
return -1;
}
if (newbrd) {
if (parse_address(dev, htype, halen,
newbrd, &ifr1) < 0)
return -1;
}
}
if (newname && strcmp(dev, newname)) {
if (do_changename(dev, newname) < 0)
return -1;
dev = newname;
}
if (qlen != -1) {
if (set_qlen(dev, qlen) < 0)
return -1;
}
if (mtu != -1) {
if (set_mtu(dev, mtu) < 0)
return -1;
}
if (newaddr || newbrd) {
if (newbrd) {
if (set_address(&ifr1, 1) < 0)
return -1;
}
if (newaddr) {
if (set_address(&ifr0, 0) < 0)
return -1;
}
}
if (mask)
return do_chflags(dev, flags, mask);
return 0;
}
#endif /* IPLINK_IOCTL_COMPAT */
static void print_mpls_stats(FILE *fp, struct rtattr *attr)
{
struct rtattr *mrtb[MPLS_STATS_MAX+1];
struct mpls_link_stats *stats;
parse_rtattr(mrtb, MPLS_STATS_MAX, RTA_DATA(attr),
RTA_PAYLOAD(attr));
if (!mrtb[MPLS_STATS_LINK])
return;
stats = RTA_DATA(mrtb[MPLS_STATS_LINK]);
fprintf(fp, " mpls:\n");
fprintf(fp, " RX: bytes packets errors dropped noroute\n");
fprintf(fp, " ");
print_num(fp, 10, stats->rx_bytes);
print_num(fp, 8, stats->rx_packets);
print_num(fp, 7, stats->rx_errors);
print_num(fp, 8, stats->rx_dropped);
print_num(fp, 7, stats->rx_noroute);
fprintf(fp, "\n");
fprintf(fp, " TX: bytes packets errors dropped\n");
fprintf(fp, " ");
print_num(fp, 10, stats->tx_bytes);
print_num(fp, 8, stats->tx_packets);
print_num(fp, 7, stats->tx_errors);
print_num(fp, 7, stats->tx_dropped);
fprintf(fp, "\n");
}
static void print_af_stats_attr(FILE *fp, int ifindex, struct rtattr *attr)
{
bool if_printed = false;
struct rtattr *i;
int rem;
rem = RTA_PAYLOAD(attr);
for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
if (preferred_family != AF_UNSPEC &&
i->rta_type != preferred_family)
continue;
if (!if_printed) {
fprintf(fp, "%u: %s\n", ifindex,
ll_index_to_name(ifindex));
if_printed = true;
}
switch (i->rta_type) {
case AF_MPLS:
print_mpls_stats(fp, i);
break;
default:
fprintf(fp, " unknown af(%d)\n", i->rta_type);
break;
}
}
}
struct af_stats_ctx {
FILE *fp;
int ifindex;
};
static int print_af_stats(struct nlmsghdr *n, void *arg)
{
struct if_stats_msg *ifsm = NLMSG_DATA(n);
struct rtattr *tb[IFLA_STATS_MAX+1];
int len = n->nlmsg_len;
struct af_stats_ctx *ctx = arg;
FILE *fp = ctx->fp;
len -= NLMSG_LENGTH(sizeof(*ifsm));
if (len < 0) {
fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
return -1;
}
if (ctx->ifindex && ifsm->ifindex != ctx->ifindex)
return 0;
parse_rtattr(tb, IFLA_STATS_MAX, IFLA_STATS_RTA(ifsm), len);
if (tb[IFLA_STATS_AF_SPEC])
print_af_stats_attr(fp, ifsm->ifindex, tb[IFLA_STATS_AF_SPEC]);
fflush(fp);
return 0;
}
static int iplink_afstats(int argc, char **argv)
{
__u32 filt_mask = IFLA_STATS_FILTER_BIT(IFLA_STATS_AF_SPEC);
const char *filter_dev = NULL;
struct af_stats_ctx ctx = {
.fp = stdout,
.ifindex = 0,
};
while (argc > 0) {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
if (filter_dev)
duparg2("dev", *argv);
filter_dev = *argv;
} else if (matches(*argv, "help") == 0) {
usage();
} else {
fprintf(stderr,
"Command \"%s\" is unknown, try \"ip link help\".\n",
*argv);
exit(-1);
}
argv++; argc--;
}
if (filter_dev) {
ctx.ifindex = ll_name_to_index(filter_dev);
if (ctx.ifindex <= 0) {
fprintf(stderr,
"Device \"%s\" does not exist.\n",
filter_dev);
return -1;
}
}
if (rtnl_statsdump_req_filter(&rth, AF_UNSPEC, filt_mask) < 0) {
perror("Cannont send dump request");
return 1;
}
if (rtnl_dump_filter(&rth, print_af_stats, &ctx) < 0) {
fprintf(stderr, "Dump terminated\n");
return 1;
}
return 0;
}
static int iplink_prop_mod(int argc, char **argv, struct iplink_req *req)
{
struct rtattr *proplist;
char *dev = NULL;
char *name;
proplist = addattr_nest(&req->n, sizeof(*req),
IFLA_PROP_LIST | NLA_F_NESTED);
while (argc > 0) {
if (matches(*argv, "altname") == 0) {
NEXT_ARG();
if (check_altifname(*argv))
invarg("not a valid altname", *argv);
name = *argv;
addattr_l(&req->n, sizeof(*req), IFLA_ALT_IFNAME,
name, strlen(name) + 1);
} else if (matches(*argv, "help") == 0) {
usage();
} else {
if (strcmp(*argv, "dev") == 0)
NEXT_ARG();
if (dev)
duparg2("dev", *argv);
if (check_altifname(*argv))
invarg("\"dev\" not a valid ifname", *argv);
dev = *argv;
}
argv++; argc--;
}
addattr_nest_end(&req->n, proplist);
if (!dev) {
fprintf(stderr, "Not enough of information: \"dev\" argument is required.\n");
exit(-1);
}
req->i.ifi_index = ll_name_to_index(dev);
if (!req->i.ifi_index)
return nodev(dev);
if (rtnl_talk(&rth, &req->n, NULL) < 0)
return -2;
return 0;
}
static int iplink_prop(int argc, char **argv)
{
struct iplink_req req = {
.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.n.nlmsg_flags = NLM_F_REQUEST,
.i.ifi_family = preferred_family,
};
if (argc <= 0) {
usage();
exit(-1);
}
if (matches(*argv, "add") == 0) {
req.n.nlmsg_flags |= NLM_F_EXCL | NLM_F_CREATE | NLM_F_APPEND;
req.n.nlmsg_type = RTM_NEWLINKPROP;
} else if (matches(*argv, "del") == 0) {
req.n.nlmsg_type = RTM_DELLINKPROP;
} else if (matches(*argv, "help") == 0) {
usage();
} else {
fprintf(stderr, "Operator required\n");
exit(-1);
}
return iplink_prop_mod(argc - 1, argv + 1, &req);
}
static void do_help(int argc, char **argv)
{
struct link_util *lu = NULL;
if (argc <= 0) {
usage();
return;
}
lu = get_link_kind(*argv);
if (lu && lu->print_help)
lu->print_help(lu, argc-1, argv+1, stdout);
else
usage();
}
int do_iplink(int argc, char **argv)
{
if (argc < 1)
return ipaddr_list_link(0, NULL);
if (iplink_have_newlink()) {
if (matches(*argv, "add") == 0)
return iplink_modify(RTM_NEWLINK,
NLM_F_CREATE|NLM_F_EXCL,
argc-1, argv+1);
if (matches(*argv, "set") == 0 ||
matches(*argv, "change") == 0)
return iplink_modify(RTM_NEWLINK, 0,
argc-1, argv+1);
if (matches(*argv, "replace") == 0)
return iplink_modify(RTM_NEWLINK,
NLM_F_CREATE|NLM_F_REPLACE,
argc-1, argv+1);
if (matches(*argv, "delete") == 0)
return iplink_modify(RTM_DELLINK, 0,
argc-1, argv+1);
} else {
#if IPLINK_IOCTL_COMPAT
if (matches(*argv, "set") == 0)
return do_set(argc-1, argv+1);
#endif
}
if (matches(*argv, "show") == 0 ||
matches(*argv, "lst") == 0 ||
matches(*argv, "list") == 0)
return ipaddr_list_link(argc-1, argv+1);
if (matches(*argv, "xstats") == 0)
return iplink_ifla_xstats(argc-1, argv+1);
if (matches(*argv, "afstats") == 0) {
iplink_afstats(argc-1, argv+1);
return 0;
}
if (matches(*argv, "property") == 0)
return iplink_prop(argc-1, argv+1);
if (matches(*argv, "help") == 0) {
do_help(argc-1, argv+1);
return 0;
}
fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n",
*argv);
exit(-1);
}