Eric Lee / smarc-fsl-linux-kernel

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samples/bpf/sock_example.h 834 Bytes
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b24413180   Greg Kroah-Hartman   License cleanup: ... 
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  /* SPDX-License-Identifier: GPL-2.0 */
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  #include <stdlib.h>
  #include <stdio.h>
  #include <linux/unistd.h>
  #include <unistd.h>
  #include <string.h>
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  #include <errno.h>
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  #include <linux/if_ether.h>
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  #include <net/if.h>
  #include <linux/if_packet.h>
  #include <arpa/inet.h>
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  #include "libbpf.h"
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  static inline int open_raw_sock(const char *name)
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  {
  	struct sockaddr_ll sll;
  	int sock;
  
  	sock = socket(PF_PACKET, SOCK_RAW | SOCK_NONBLOCK | SOCK_CLOEXEC, htons(ETH_P_ALL));
  	if (sock < 0) {
  		printf("cannot create raw socket
  ");
  		return -1;
  	}
  
  	memset(&sll, 0, sizeof(sll));
  	sll.sll_family = AF_PACKET;
  	sll.sll_ifindex = if_nametoindex(name);
  	sll.sll_protocol = htons(ETH_P_ALL);
  	if (bind(sock, (struct sockaddr *)&sll, sizeof(sll)) < 0) {
  		printf("bind to %s: %s
  ", name, strerror(errno));
  		close(sock);
  		return -1;
  	}
  
  	return sock;
  }