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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* link_veth.c veth driver module
*
* Authors: Pavel Emelianov <xemul@openvz.org>
*/
#include <string.h>
#include <net/if.h>
#include <linux/veth.h>
#include "utils.h"
#include "ip_common.h"
static void print_usage(FILE *f)
{
printf("Usage: ip link <options> type veth [peer <options>]\n"
"To get <options> type 'ip link add help'\n");
}
static void usage(void)
{
print_usage(stderr);
}
static int veth_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
char *type = NULL;
int err;
struct rtattr *data;
struct ifinfomsg *ifm, *peer_ifm;
unsigned int ifi_flags, ifi_change, ifi_index;
if (strcmp(argv[0], "peer") != 0) {
usage();
return -1;
}
ifm = NLMSG_DATA(n);
ifi_flags = ifm->ifi_flags;
ifi_change = ifm->ifi_change;
ifi_index = ifm->ifi_index;
ifm->ifi_flags = 0;
ifm->ifi_change = 0;
ifm->ifi_index = 0;
data = addattr_nest(n, 1024, VETH_INFO_PEER);
n->nlmsg_len += sizeof(struct ifinfomsg);
err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)n, &type);
if (err < 0)
return err;
if (type)
duparg("type", argv[err]);
peer_ifm = RTA_DATA(data);
peer_ifm->ifi_index = ifm->ifi_index;
peer_ifm->ifi_flags = ifm->ifi_flags;
peer_ifm->ifi_change = ifm->ifi_change;
ifm->ifi_flags = ifi_flags;
ifm->ifi_change = ifi_change;
ifm->ifi_index = ifi_index;
addattr_nest_end(n, data);
return argc - 1 - err;
}
static void veth_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
print_usage(f);
}
struct link_util veth_link_util = {
.id = "veth",
.parse_opt = veth_parse_opt,
.print_help = veth_print_help,
};
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