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networking/udhcp/arpping.c
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/* vi: set sw=4 ts=4: */  
/*  
 * arpping.c  
 *  
 * Mostly stolen from: dhcpcd - DHCP client daemon  
 * by Yoichi Hariguchi <yoichi@fore.com>  
 */  
  
#include <netinet/if_ether.h>   
#include <net/if_arp.h>   
  
#include "common.h"   
#include "dhcpd.h"   
  
//ÕâÀïÊÇarp°üµÄ¸ñʽ,ÆäÖеÄÊý¾Ý¸ñʽ¶¼ÊǺêÁË£¬±ÈÈçuint_8_tΪÎÞ·ûchar.   
struct arpMsg {   
    /* Ethernet header */  
    uint8_t  h_dest[6];     /* 00 destination ether addr */  
    uint8_t  h_source[6];   /* 06 source ether addr */  
    uint16_t h_proto;       /* 0c packet type ID field */  
  
    /* ARP packet */  
    uint16_t htype;         /* 0e hardware type (must be ARPHRD_ETHER) */  
    uint16_t ptype;         /* 10 protocol type (must be ETH_P_IP) */  
    uint8_t  hlen;   &nb


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