我这里头文件无法打开7个，代码也错了一点。

#include <sys/types.h>
#include <sys/socket.h>
#include <algorithm.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <linux/if_packet.h>
#include <netinet/if_ether.h>
#include <netinet/in.h>

typedef struct _iphdr //定义IP首部 
{
    unsigned char h_verlen; //4位首部长度+4位IP版本号 
    unsigned char tos; //8位服务类型TOS 
    unsigned short total_len; //16位总长度（字节） 
    unsigned short ident; //16位标识 
    unsigned short frag_and_flags; //3位标志位 
    unsigned char ttl; //8位生存时间 TTL 
    unsigned char proto; //8位协议 (TCP, UDP 或其他) 
    unsigned short checksum; //16位IP首部校验和 
    unsigned int sourceIP; //32位源IP地址 
    unsigned int destIP; //32位目的IP地址 

}IP_HEADER;
typedef struct _udphdr //定义UDP首部
{
    unsigned short uh_sport;    //16位源端口
    unsigned short uh_dport;    //16位目的端口
    unsigned int uh_len;//16位UDP包长度
    unsigned int uh_sum;//16位校验和
}UDP_HEADER;

typedef struct _tcphdr //定义TCP首部 
{
    unsigned short th_sport; //16位源端口 
    unsigned short th_dport; //16位目的端口 
    unsigned int th_seq; //32位序列号 
    unsigned int th_ack; //32位确认号 
    unsigned char th_lenres;//4位首部长度/6位保留字 
    unsigned char th_flag; //6位标志位
    unsigned short th_win; //16位窗口大小
    unsigned short th_sum; //16位校验和
    unsigned short th_urp; //16位紧急数据偏移量
}TCP_HEADER;

typedef struct _icmphdr {
    unsigned char  icmp_type;
    unsigned char icmp_code; /* type sub code */
    unsigned short icmp_cksum;
    unsigned short icmp_id;
    unsigned short icmp_seq;
    /* This is not the std header, but we reserve space for time */
    unsigned short icmp_timestamp;
}ICMP_HEADER;

void analyseIP(IP_HEADER* ip);
void analyseTCP(TCP_HEADER* tcp);
void analyseUDP(UDP_HEADER* udp);
void analyseICMP(ICMP_HEADER* icmp);


int main(void)
{
    int sockfd;
    IP_HEADER* ip;
    char buf[10240];
    ssize_t n;
    /* capture ip datagram without ethernet header */
    if ((sockfd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) == -1)
    {
        printf("socket error!\n");
        return 1;
    }
    while (1)
    {
        n = recv(sockfd, buf, sizeof(buf), 0);
        if (n == -1)
        {
            printf("recv error!\n");
            break;
        }
        else if (n == 0)
            continue;
        //接收数据不包括数据链路帧头
        ip = (IP_HEADER*)(buf);
        analyseIP(ip);
        size_t iplen = (ip->h_verlen & 0x0f) * 4;
        TCP_HEADER* tcp = (TCP_HEADER*)(buf + iplen);
        if (ip->proto == IPPROTO_TCP)
        {
            TCP_HEADER* tcp = (TCP_HEADER*)(buf + iplen);
            analyseTCP(tcp);
        }
        else if (ip->proto == IPPROTO_UDP)
        {
            UDP_HEADER* udp = (UDP_HEADER*)(buf + iplen);
            analyseUDP(udp);
        }
        else if (ip->proto == IPPROTO_ICMP)
        {
            ICMP_HEADER* icmp = (ICMP_HEADER*)(buf + iplen);
            analyseICMP(icmp);
        }
        else if (ip->proto == IPPROTO_IGMP)
        {
            printf("IGMP----\n");
        }
        else
        {
            printf("other protocol!\n");
        }
        printf("\n\n");
    }
    close(sockfd);
    return 0;
}

void analyseIP(IP_HEADER* ip)
{
    unsigned char* p = (unsigned char*)&ip->sourceIP;
    printf("Source IP\t: %u.%u.%u.%u\n", p[0], p[1], p[2], p[3]);
    p = (unsigned char*)&ip->destIP;
    printf("Destination IP\t: %u.%u.%u.%u\n", p[0], p[1], p[2], p[3]);

}

void analyseTCP(TCP_HEADER* tcp)
{
    printf("TCP -----\n");
    printf("Source port: %u\n", ntohs(tcp->th_sport));
    printf("Dest port: %u\n", ntohs(tcp->th_dport));
}

void analyseUDP(UDP_HEADER* udp)
{
    printf("UDP -----\n");
    printf("Source port: %u\n", ntohs(udp->uh_sport));
    printf("Dest port: %u\n", ntohs(udp->uh_dport));
}

void analyseICMP(ICMP_HEADER* icmp)
{
    printf("ICMP -----\n");
    printf("type: %u\n", icmp->icmp_type);
    printf("sub code: %u\n", icmp->icmp_code);
}