/*
?*?arp.c
?*
?*??Created?on:?2009-7-7
?*??????Author:?lele
?*
?*??????處理ARP請求
?*??????Hardware?type?	Protocol?type
		Hardware?address?length?	Protocol?address?length?	Opcode
		Source?hardware?address?:::
		Source?protocol?address?:::
		Destination?hardware?address?:::
		Destination?protocol?address?:::
		Data?:::
?*
?*/

#include?“sniffer.h“

void?handle_arp?（const?u_char*?packet）
{
	//ARP?頭
	struct?nast_arp_hdr?*arp;
	struct?libnet_ethernet_hdr?*eptr;
	u_short?ether_type;

	eptr?=?（struct?libnet_ethernet_hdr?*）?packet;
	arp?=?（struct?nast_arp_hdr?*）?（packet+offset）;
	ether_type?=?ntohs（eptr->ether_type）;
	if?（ether_type?==?ETHERTYPE_ARP）
	{
		fprintf（logfile?“\n---[?ARP?]-----------------------------------------------------------\n“）;
		fprintf（logfile?“%s?->?“?nast_hex_ntoa?（eptr->ether_shost））;
		fprintf（logfile?“%s\n“?nast_hex_ntoa?（eptr->ether_dhost））;

		switch?（ntohs（arp->ar_op））
		??{
		???case?1:
		???????{
			??fprintf（logfile?“類型:?ARP?請求:?“）;
			??fprintf（logfile?“Who?has?%d.%d.%d.%d??“arp->__ar_tip[0]arp->__ar_tip[1]arp->__ar_tip[2]arp->__ar_tip[3]）;
			??fprintf（logfile?“Tell?%d.%d.%d.%d\n“arp->__ar_sip[0]arp->__ar_sip[1]arp->__ar_sip[2]arp->__ar_sip[3]）;
		???????}
		?????break;
		???case?2:
		???????{
			??fprintf（logfile?“類型:?ARP?應答:?“）;
			??fprintf（logfile?“%d.%d.%d.%d?is?at?%s\n“arp->__ar_sip[0]arp->__ar_sip[1]arp->__ar_sip[2]arp->__ar_sip[3]?nast_hex_ntoa?（eptr->ether_shost））;
		???????}
		?????break;
		???case?8:
		?????fprintf（logfile?“類型:?InARP?請求“）;
		?????break;
		???case?9:
		?????fprintf（logfile?“類型:?InARP?應答\t“）;
		?????break;
		???default:
		?????fprintf（logfile?“類型:?未知操作符“）;
		?????break;
		??}

		fprintf（logfile?“硬件大小:?%d?-?“?arp->ar_hln）;
		fprintf（logfile?“協議大小:?%d\n“?arp->ar_pln）;

	}
	?else??if?（eptr->ether_type?==?ETHERTYPE_REVARP）
	?{
		fprintf（logfile?“\n---[?RARP?]----------------------------------------------------------\n“）;
		fprintf（logfile?“%s?->?“??nast_hex_ntoa?（eptr->ether_shost））;
		fprintf（logfile?“%s\n“?nast_hex_ntoa?（eptr->ether_dhost））;
		switch?（ntohs（arp->ar_op））
		??{
		???case?3:
		?????fprintf（logfile?“類型:?RARP?請求“）;
		?????break;
		???case?4:
		?????fprintf（logfile?“類型:?RARP?應答\t“）;
		?????break;
		???case?8:
		?????fprintf（logfile?“類型:?InARP?請求“）;
		?????break;
		???case?9:
		?????fprintf（logfile?“類型:?InARP?應答\t“）;
		?????break;
		???default:
		?????fprintf（logfile?“類型:?未知操作符“）;
		?????break;

		??}

		fprintf（logfile?“\t硬件大小:?%d?-?“arp->ar_hln）;
		fprintf（logfile?“協議大小:?%d\n“arp->ar_pln）;

	?}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????615705??2009-10-04?17:03??項目報告1.pdf

?????文件???????2680??2009-07-08?13:42??src\arp.c

?????文件???????2462??2009-07-08?13:42??src\common.c

?????文件????????800??2009-07-08?13:24??src\device.c

?????文件????????918??2009-07-07?21:15??src\ethernet.c

?????文件???????4977??2009-07-08?15:05??src\find_gateway.c

?????文件???????7581??2009-07-08?13:02??src\icmp.c

?????文件???????1965??2009-07-07?22:16??src\igmp.c

?????文件???????3730??2009-07-08?15:06??src\main.c

?????文件????????112??2009-07-08?20:43??src\makefile

?????文件???????7828??2009-07-08?13:17??src\port.c

?????文件??????38158??2009-07-08?22:38??src\sniffer

?????文件???????4052??2009-07-08?12:56??src\sniffer.c

?????文件???????2611??2009-07-08?14:28??src\sniffer.h

?????文件???????3776??2009-07-07?22:20??src\tcp.c

?????文件???????1834??2009-07-07?22:22??src\udp.c

?????目錄??????????0??2009-08-09?14:35??src

-----------?---------??----------?-----??----

???????????????699189????????????????????17