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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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