arphdr.h

一个很好用的linux 下的流量监控软件

/*
 * arp header format, stolen from the Linux include files.
 */

struct arp_hdr {
    unsigned short ar_hrd;      /* format of hardware address   */
    unsigned short ar_pro;      /* format of protocol address   */
    unsigned char ar_hln;       /* length of hardware address   */
    unsigned char ar_pln;       /* length of protocol address   */
    unsigned short ar_op;       /* ARP opcode (command)         */

    /*
     *      Ethernet looks like this : This bit is variable sized however...
     */
    unsigned char ar_sha[ETH_ALEN];     /* sender hardware address      */
    unsigned char ar_sip[4];    /* sender IP address            */
    unsigned char ar_tha[ETH_ALEN];     /* target hardware address      */
    unsigned char ar_tip[4];    /* target IP address            */

};