proxmox-mirrors/mirror_iproute2
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_iproute2 synced 2025-11-04 06:22:48 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
e2cfe5501f
mirror_iproute2/ip/iplink.c
Phil Sutter 08c0466b11 ip-link: add missing {min,max}_tx_rate to help text 
These vf options are described in man page already, they're just missing
in help output.

Signed-off-by: Phil Sutter <phil@nwl.cc>
2016-08-17 13:54:31 -07:00

1370 lines
34 KiB
C
Raw Blame History

/*
* 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 <syslog.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 <linux/sockios.h>
#include <stdbool.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "namespace.h"
#define IPLINK_IOCTL_COMPAT 1
#ifndef LIBDIR
#define LIBDIR "/usr/lib"
#endif
static void usage(void) __attribute__((noreturn));
static int iplink_have_newlink(void);
void iplink_usage(void)
{
if (iplink_have_newlink()) {
fprintf(stderr, "Usage: ip link add [link DEV] [ name ] NAME\n");
fprintf(stderr, " [ txqueuelen PACKETS ]\n");
fprintf(stderr, " [ address LLADDR ]\n");
fprintf(stderr, " [ broadcast LLADDR ]\n");
fprintf(stderr, " [ mtu MTU ] [index IDX ]\n");
fprintf(stderr, " [ numtxqueues QUEUE_COUNT ]\n");
fprintf(stderr, " [ numrxqueues QUEUE_COUNT ]\n");
fprintf(stderr, " type TYPE [ ARGS ]\n");
fprintf(stderr, " ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n");
fprintf(stderr, "\n");
fprintf(stderr, " ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n");
fprintf(stderr, " [ { up | down } ]\n");
fprintf(stderr, " [ type TYPE ARGS ]\n");
} else
fprintf(stderr, "Usage: ip link set DEVICE [ { up | down } ]\n");
fprintf(stderr, " [ arp { on | off } ]\n");
fprintf(stderr, " [ dynamic { on | off } ]\n");
fprintf(stderr, " [ multicast { on | off } ]\n");
fprintf(stderr, " [ allmulticast { on | off } ]\n");
fprintf(stderr, " [ promisc { on | off } ]\n");
fprintf(stderr, " [ trailers { on | off } ]\n");
fprintf(stderr, " [ txqueuelen PACKETS ]\n");
fprintf(stderr, " [ name NEWNAME ]\n");
fprintf(stderr, " [ address LLADDR ]\n");
fprintf(stderr, " [ broadcast LLADDR ]\n");
fprintf(stderr, " [ mtu MTU ]\n");
fprintf(stderr, " [ netns { PID | NAME } ]\n");
fprintf(stderr, " [ link-netnsid ID ]\n");
fprintf(stderr, " [ alias NAME ]\n");
fprintf(stderr, " [ vf NUM [ mac LLADDR ]\n");
fprintf(stderr, " [ vlan VLANID [ qos VLAN-QOS ] ]\n");
fprintf(stderr, " [ rate TXRATE ]\n");
fprintf(stderr, " [ max_tx_rate TXRATE ]\n");
fprintf(stderr, " [ min_tx_rate TXRATE ]\n");
fprintf(stderr, " [ spoofchk { on | off} ]\n");
fprintf(stderr, " [ query_rss { on | off} ]\n");
fprintf(stderr, " [ state { auto | enable | disable} ] ]\n");
fprintf(stderr, " [ trust { on | off} ] ]\n");
fprintf(stderr, " [ master DEVICE ][ vrf NAME ]\n");
fprintf(stderr, " [ nomaster ]\n");
fprintf(stderr, " [ addrgenmode { eui64 | none | stable_secret | random } ]\n");
fprintf(stderr, " [ protodown { on | off } ]\n");
fprintf(stderr, " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n");
if (iplink_have_newlink()) {
fprintf(stderr, " ip link help [ TYPE ]\n");
fprintf(stderr, "\n");
fprintf(stderr, "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | macvtap |\n");
fprintf(stderr, " bridge | bond | ipoib | ip6tnl | ipip | sit | vxlan |\n");
fprintf(stderr, " gre | gretap | ip6gre | ip6gretap | vti | nlmon |\n");
fprintf(stderr, " bond_slave | ipvlan | geneve | bridge_slave | vrf | macsec }\n");
}
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;
static struct link_util *__get_link_kind(const char *id, bool slave)
{
void *dlh;
char buf[256];
struct link_util *l;
for (l = linkutil_list; l; l = l->next)
if (strcmp(l->id, id) == 0 &&
l->slave == slave)
return l;
snprintf(buf, sizeof(buf), LIBDIR "/ip/link_%s.so", 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;
}
}
if (slave)
snprintf(buf, sizeof(buf), "%s_slave_link_util", id);
else
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;
}
struct link_util *get_link_kind(const char *id)
{
return __get_link_kind(id, false);
}
struct link_util *get_link_slave_kind(const char *id)
{
return __get_link_kind(id, true);
}
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(const struct sockaddr_nl *who,
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 */
struct iplink_req {
struct nlmsghdr n;
struct ifinfomsg i;
char buf[1024];
};
static int nl_get_ll_addr_len(unsigned int dev_index)
{
int len;
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 rtattr *tb[IFLA_MAX+1];
if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
return -1;
len = req.n.nlmsg_len - NLMSG_LENGTH(sizeof(req.i));
if (len < 0)
return -1;
parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(&req.i), len, NLA_F_NESTED);
if (!tb[IFLA_ADDRESS])
return -1;
return RTA_PAYLOAD(tb[IFLA_ADDRESS]);
}
static int iplink_parse_vf(int vf, int *argcp, char ***argvp,
struct iplink_req *req, int dev_index)
{
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;
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_index);
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 ivv;
NEXT_ARG();
if (get_unsigned(&ivv.vlan, *argv, 0))
invarg("Invalid \"vlan\" value\n", *argv);
ivv.vf = vf;
ivv.qos = 0;
if (NEXT_ARG_OK()) {
NEXT_ARG();
if (matches(*argv, "qos") == 0) {
NEXT_ARG();
if (get_unsigned(&ivv.qos, *argv, 0))
invarg("Invalid \"qos\" value\n", *argv);
} else {
/* rewind arg */
PREV_ARG();
}
}
addattr_l(&req->n, sizeof(*req), IFLA_VF_VLAN,
&ivv, sizeof(ivv));
} 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();
if (matches(*argv, "on") == 0)
ivs.setting = 1;
else if (matches(*argv, "off") == 0)
ivs.setting = 0;
else
return on_off("spoofchk", *argv);
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();
if (matches(*argv, "on") == 0)
ivs.setting = 1;
else if (matches(*argv, "off") == 0)
ivs.setting = 0;
else
return on_off("query_rss", *argv);
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();
if (matches(*argv, "on") == 0)
ivt.setting = 1;
else if (matches(*argv, "off") == 0)
ivt.setting = 0;
else
invarg("Invalid \"trust\" value\n", *argv);
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_index);
if (tivt.min_tx_rate == -1)
tivt.min_tx_rate = tmin;
if (tivt.max_tx_rate == -1)
tivt.max_tx_rate = tmax;
}
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 **name, char **type, char **link, char **dev,
int *group, int *index)
{
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 dev_index = 0;
int link_netnsid = -1;
int addr_len = 0;
*group = -1;
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();
*name = *argv;
} else if (strcmp(*argv, "index") == 0) {
NEXT_ARG();
*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, "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, "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_index == 0)
missarg("dev");
len = iplink_parse_vf(vf, &argc, &argv, req, dev_index);
if (len < 0)
return -1;
addattr_nest_end(&req->n, vflist);
} 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();
addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS,
*argv, strlen(*argv));
argc--; argv++;
break;
} 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);
} 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-netnsid") == 0) {
NEXT_ARG();
if (link_netnsid != -1)
duparg("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();
if (strcmp(*argv, "on") == 0)
proto_down = 1;
else if (strcmp(*argv, "off") == 0)
proto_down = 0;
else
return on_off("protodown", *argv);
addattr8(&req->n, sizeof(*req), IFLA_PROTO_DOWN,
proto_down);
} else {
if (matches(*argv, "help") == 0)
usage();
if (strcmp(*argv, "dev") == 0)
NEXT_ARG();
if (*dev)
duparg2("dev", *argv);
*dev = *argv;
dev_index = ll_name_to_index(*dev);
}
argc--; argv++;
}
if (dev_index && addr_len) {
int halen = nl_get_ll_addr_len(dev_index);
if (halen >= 0 && halen != addr_len) {
fprintf(stderr,
"Invalid address length %d - must be %d bytes\n",
addr_len, halen);
return -1;
}
}
return ret - argc;
}
static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
{
int len;
char *dev = NULL;
char *name = NULL;
char *link = NULL;
char *type = NULL;
int index = -1;
int group;
struct link_util *lu = 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, &name, &type, &link, &dev, &group, &index);
if (ret < 0)
return ret;
argc -= ret;
argv += ret;
if (group != -1) {
if (dev)
addattr_l(&req.n, sizeof(req), IFLA_GROUP,
&group, sizeof(group));
else {
if (argc) {
fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
*argv);
return -1;
}
if (flags & NLM_F_CREATE) {
fprintf(stderr, "group cannot be used when creating devices.\n");
return -1;
}
req.i.ifi_index = 0;
addattr32(&req.n, sizeof(req), IFLA_GROUP, group);
if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
return -2;
return 0;
}
}
if (!(flags & NLM_F_CREATE)) {
if (!dev) {
fprintf(stderr, "Not enough information: \"dev\" argument is required.\n");
exit(-1);
}
if (cmd == RTM_NEWLINK && index != -1) {
fprintf(stderr, "index can be used only when creating devices.\n");
exit(-1);
}
req.i.ifi_index = ll_name_to_index(dev);
if (req.i.ifi_index == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n", dev);
return -1;
}
} else {
/* Allow "ip link add dev" and "ip link add name" */
if (!name)
name = dev;
if (link) {
int ifindex;
ifindex = ll_name_to_index(link);
if (ifindex == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n",
link);
return -1;
}
addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4);
}
if (index == -1)
req.i.ifi_index = 0;
else
req.i.ifi_index = index;
}
if (name) {
len = strlen(name) + 1;
if (len == 1)
invarg("\"\" is not a valid device identifier\n",
"name");
if (len > IFNAMSIZ)
invarg("\"name\" too long\n", name);
addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len);
}
if (type) {
struct rtattr *linkinfo;
char slavebuf[128], *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));
if (ulinep && !strcmp(ulinep, "_slave")) {
strncpy(slavebuf, type, sizeof(slavebuf));
slavebuf[sizeof(slavebuf) - 1] = '\0';
ulinep = strchr(slavebuf, '_');
/* check in case it was after sizeof(slavebuf) - 1*/
if (ulinep)
*ulinep = '\0';
lu = get_link_slave_kind(slavebuf);
iflatype = IFLA_INFO_SLAVE_DATA;
} else {
lu = get_link_kind(type);
iflatype = IFLA_INFO_DATA;
}
if (lu && argc) {
struct rtattr *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) < 0)
return -2;
return 0;
}
int iplink_get(unsigned int flags, char *name, __u32 filt_mask)
{
int len;
struct iplink_req req = {
.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.n.nlmsg_flags = NLM_F_REQUEST | flags,
.n.nlmsg_type = RTM_GETLINK,
.i.ifi_family = preferred_family,
};
struct {
struct nlmsghdr n;
char buf[16384];
} answer;
if (name) {
len = strlen(name) + 1;
if (len == 1)
invarg("\"\" is not a valid device identifier\n",
"name");
if (len > IFNAMSIZ)
invarg("\"name\" too long\n", name);
addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len);
}
addattr32(&req.n, sizeof(req), IFLA_EXT_MASK, filt_mask);
if (rtnl_talk(&rth, &req.n, &answer.n, sizeof(answer)) < 0)
return -2;
if (brief)
print_linkinfo_brief(NULL, &answer.n, stdout);
else
print_linkinfo(NULL, &answer.n, stdout);
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;
strncpy(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;
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
strncpy(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;
strncpy(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;
strncpy(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;
}
strncpy(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));
strncpy(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();
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);
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 (strlen(newname) == 0)
invarg("\"\" is not a valid device identifier\n", "name");
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 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, "help") == 0) {
do_help(argc-1, argv+1);
return 0;
}
fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n",
*argv);
exit(-1);
}
Reference in New Issue View Git Blame Copy Permalink