使用raw socket编程抓取goose报文

编写源文件goose.c

#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#include<netinet/ip_icmp.h>
#include<netinet/tcp.h>
#include<netinet/udp.h>
#include<net/if.h>
#include<arpa/inet.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<sys/ioctl.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <time.h>

#define BUFFSIZE 8024

struct goose_pkt{
	uint8_t dest[6];
	uint8_t src[6];
	uint16_t type;
	//uint32_t vlan;
	uint16_t app_id;
	uint16_t length;
	uint8_t reserve[6 * 16 + 2];
	uint16_t sq_num;
}__attribute__((packed));


struct session {
	time_t time;
	uint16_t seq_num;
	uint32_t cnt;
	uint32_t time_diff;
};

#define MAX_APP_ID 0x1200
struct session map[MAX_APP_ID];

/*
 * return:
 * 0 success
 * 1 timeout
 * -1 fail
 */
int get_goose_massage(int sockfd, uint8_t *buff, uint32_t *length)
{