采集IP报文头部的前60字节，数据格式如下图所示：

    /* ipheader.ip_hl*4 > 20 && ipheader.ip_p == 6 */
    struct trace_record_tcp_with_ip_option
    {
        struct timeval tv;    /* 8 bytes */
        struct ip ipheader;   /* 20 bytes */
        unsigned long option; /* 4 bytes */
        struct tcphdr tcpheader; /* 20 bytes */
    }

    /* ipheader.ip_hl*4 > 20 && ipheader.ip_p != 6 */
    struct trace_record_not_tcp_with_ip_option
    {
        struct timeval tv;    /* 8 bytes */
        struct ip ipheader;   /* 20 bytes */
        unsigned long option; /* 4 bytes */
        union
        {
            struct udphdr udpheader; /* 8 bytes */
            unsigned long long not_tcp_udp_header; /* 8 bytes */
        }
    }

    /* ipheader.ip_hl*4 == 20 && ipheader.ip_p == 6 */
    struct trace_record_tcp_without_ip_option
    {
        struct timeval tv;    /* 8 bytes */
        struct ip ipheader;   /* 20 bytes */
        struct tcphdr tcpheader; /* 20 bytes */
    }

    /* ipheader.ip_hl*4 == 20 && ipheader.ip_p != 6 */
    struct trace_record_not_tcp_without_ip_option
    {
        struct timeval tv;    /* 8 bytes */
        struct ip ipheader;   /* 20 bytes */
        union
        {
            struct udphdr udpheader; /* 8 bytes */
            unsigned long long not_tcp_udp_header; /* 8 bytes */
        }
    }