blob: a27d7579bc7309e1dadb9fc4da36604fb970cd2d [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Alexei Starovoitov3c731eb2014-09-26 00:17:07 -07002#include <stdlib.h>
3#include <stdio.h>
4#include <linux/unistd.h>
5#include <unistd.h>
6#include <string.h>
Alexei Starovoitov3c731eb2014-09-26 00:17:07 -07007#include <errno.h>
Arnaldo Carvalho de Meloee129962016-12-27 21:49:17 -03008#include <linux/if_ether.h>
Alexei Starovoitov03f47232014-12-01 15:06:36 -08009#include <net/if.h>
10#include <linux/if_packet.h>
11#include <arpa/inet.h>
Alexei Starovoitov3c731eb2014-09-26 00:17:07 -070012
Joe Stringer98996942016-12-08 18:46:20 -080013static inline int open_raw_sock(const char *name)
Alexei Starovoitov03f47232014-12-01 15:06:36 -080014{
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}