sock_example.h 814 B

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  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. static inline int open_raw_sock(const char *name)
  13. {
  14. struct sockaddr_ll sll;
  15. int sock;
  16. sock = socket(PF_PACKET, SOCK_RAW | SOCK_NONBLOCK | SOCK_CLOEXEC, htons(ETH_P_ALL));
  17. if (sock < 0) {
  18. printf("cannot create raw socket\n");
  19. return -1;
  20. }
  21. memset(&sll, 0, sizeof(sll));
  22. sll.sll_family = AF_PACKET;
  23. sll.sll_ifindex = if_nametoindex(name);
  24. sll.sll_protocol = htons(ETH_P_ALL);
  25. if (bind(sock, (struct sockaddr *)&sll, sizeof(sll)) < 0) {
  26. printf("bind to %s: %s\n", name, strerror(errno));
  27. close(sock);
  28. return -1;
  29. }
  30. return sock;
  31. }