1/* SPDX-License-Identifier: GPL-2.0 */
2#include <stdlib.h>
3#include <stdio.h>
4#include <linux/unistd.h>
5#include <unistd.h>
6#include <string.h>
7#include <errno.h>
8#include <linux/if_ether.h>
9#include <net/if.h>
10#include <linux/if_packet.h>
11#include <arpa/inet.h>
12
13static inline int open_raw_sock(const char *name)
14{
15	struct sockaddr_ll sll;
16	int sock;
17
18	sock = socket(PF_PACKET, SOCK_RAW | SOCK_NONBLOCK | SOCK_CLOEXEC, htons(ETH_P_ALL));
19	if (sock < 0) {
20		printf("cannot create raw socket\n");
21		return -1;
22	}
23
24	memset(&sll, 0, sizeof(sll));
25	sll.sll_family = AF_PACKET;
26	sll.sll_ifindex = if_nametoindex(name);
27	sll.sll_protocol = htons(ETH_P_ALL);
28	if (bind(sock, (struct sockaddr *)&sll, sizeof(sll)) < 0) {
29		printf("bind to %s: %s\n", name, strerror(errno));
30		close(sock);
31		return -1;
32	}
33
34	return sock;
35}
36