162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#include <stdlib.h> 362306a36Sopenharmony_ci#include <stdio.h> 462306a36Sopenharmony_ci#include <linux/unistd.h> 562306a36Sopenharmony_ci#include <unistd.h> 662306a36Sopenharmony_ci#include <string.h> 762306a36Sopenharmony_ci#include <errno.h> 862306a36Sopenharmony_ci#include <linux/if_ether.h> 962306a36Sopenharmony_ci#include <net/if.h> 1062306a36Sopenharmony_ci#include <linux/if_packet.h> 1162306a36Sopenharmony_ci#include <arpa/inet.h> 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_cistatic inline int open_raw_sock(const char *name) 1462306a36Sopenharmony_ci{ 1562306a36Sopenharmony_ci struct sockaddr_ll sll; 1662306a36Sopenharmony_ci int sock; 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ci sock = socket(PF_PACKET, SOCK_RAW | SOCK_NONBLOCK | SOCK_CLOEXEC, htons(ETH_P_ALL)); 1962306a36Sopenharmony_ci if (sock < 0) { 2062306a36Sopenharmony_ci printf("cannot create raw socket\n"); 2162306a36Sopenharmony_ci return -1; 2262306a36Sopenharmony_ci } 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ci memset(&sll, 0, sizeof(sll)); 2562306a36Sopenharmony_ci sll.sll_family = AF_PACKET; 2662306a36Sopenharmony_ci sll.sll_ifindex = if_nametoindex(name); 2762306a36Sopenharmony_ci sll.sll_protocol = htons(ETH_P_ALL); 2862306a36Sopenharmony_ci if (bind(sock, (struct sockaddr *)&sll, sizeof(sll)) < 0) { 2962306a36Sopenharmony_ci printf("bind to %s: %s\n", name, strerror(errno)); 3062306a36Sopenharmony_ci close(sock); 3162306a36Sopenharmony_ci return -1; 3262306a36Sopenharmony_ci } 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci return sock; 3562306a36Sopenharmony_ci} 36