#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

#define?MAX_ROUTE_INFO?8;
#define?MAX_ARP_SIZE?8;
#define?MAX_DEVICE?4;
#define?BUFFER_MAX?2048

typedef?struct?route_item{
	unsigned?int?destination;
	unsigned?int?gateway;
	unsigned?int?netmask;
	unsigned?char?interface[14];
};
struct?route_item?route_info[8];
int?route_item_index;

typedef?struct?arp_table_item{
	unsigned?int?ip_addr;
	unsigned?char?mac_addr[6];
};
struct?arp_table_item?arp_table[8];
int?arp_item_index;

typedef?struct?device_item{
	unsigned?char?interface[14];
	unsigned?char?mac_addr[6];
	unsigned?int?ip_addr;
};
struct?device_item?device[4];
int?device_index;


/*初始化函數(shù)，首先是把你的靜態(tài)路由信息添加到你的route_info[]這個(gè)數(shù)組中
??我在自己機(jī)器上時(shí)如下添加的，具體情況根據(jù)你的網(wǎng)絡(luò)拓?fù)淝闆r添加
??參照l(shuí)inux自帶的路由結(jié)構(gòu)，destination表示的是目的網(wǎng)絡(luò)號(hào)，gateway表示要經(jīng)過(guò)
??的網(wǎng)關(guān)，如果為零說(shuō)明已經(jīng)到達(dá)最后一個(gè)路由節(jié)點(diǎn)，下一條就是目的地，netmask：
??用來(lái)提取目的網(wǎng)絡(luò)號(hào)：實(shí)際操作時(shí)把netmask?和?ip報(bào)文內(nèi)的目的地址進(jìn)行按位與操???
??作，然后把結(jié)果同當(dāng)前的目的網(wǎng)絡(luò)號(hào)對(duì)比
??下面說(shuō)一下device[]這個(gè)數(shù)組，它用來(lái)存放路由的網(wǎng)卡信息的，比如說(shuō)你在終端中輸
??入ifconfig后，會(huì)出現(xiàn)一些網(wǎng)卡的信息，比如說(shuō)eth0，在里面找到MAC和IP，填入我
??的device[]數(shù)組中
*/

void?initial（）
{	
	route_item_index?=?3;
	route_info[0].destination?=?inet_addr（“192.168.2.0“）;
	route_info[0].gateway?=?inet_addr（“192.168.1.2“）;
	route_info[0].netmask?=?inet_addr（“255.255.255.0“）;
	strcpy（route_info[0].interface?“eth0“）;

	route_info[1].destination?=?inet_addr（“192.168.1.0“）;
	route_info[1].gateway?=?0;
	route_info[1].netmask?=?inet_addr（“255.255.255.0“）;
	strcpy（route_info[1].interface?“eth0“）;

	route_info[2].destination?=?inet_addr（“192.168.0.0“）;
	route_info[2].gateway?=?0;
	route_info[2].netmask?=?inet_addr（“255.255.255.0“）;
	strcpy（route_info[2].interface?“eth1“）;
	

	arp_item_index?=?0;
	
	device_index?=?2;
	strcpy（device[0].interface?“eth0“）;
	device[0].mac_addr[0]?=?0X00;
	device[0].mac_addr[1]?=?0X0C;
	device[0].mac_addr[2]?=?0X29;
	device[0].mac_addr[3]?=?0XE3;
	device[0].mac_addr[4]?=?0X25;
	device[0].mac_addr[5]?=?0X86;
	device[0].ip_addr?=?inet_addr（“192.168.1.1“）;


	strcpy（device[1].interface?“eth1“）;
	device[1].mac_addr[0]?=?0X00;
	device[1].mac_addr[1]?=?0X0C;
	device[1].mac_addr[2]?=?0X29;
	device[1].mac_addr[3]?=?0XE3;
	device[1].mac_addr[4]?=?0X25;
	device[1].mac_addr[5]?=?0X90;
	device[1].ip_addr?=?inet_addr（“192.168.0.1“）;
};

void?UpdateArpTable（unsigned?char?Iface[]?int?n?unsigned?int?target）
{
	int?sockfdij;
	sockfd?=?socket（PF_INET?SOCK_PACKET?htons（ETH_P_ARP））;

	char?buffer[BUFFER_MAX];
	struct?sockaddr?tofrom;
	int?fromlen=sizeof（struct?sockaddr）;
	strcpy（to.sa_dataIface）;
	strcpy（from.sa_dataIface）;
	char?datagram[BUFFER_MAX];
	struct?ethhdr?*eth_header?=?datagram;
	struct?arphdr?*arp_header?=?datagram?+?sizeof（struct?ethhdr）;	
	memset?（datagram?0?BUFFER_MAX）;

	for（i?=?0;i?	eth_header->h_dest[i]?=?0XFF;
	int?flag;
	for（i?=?0;i?	if（strcmp（Iface

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

????.CA....??????9148??2010-04-12?22:36??route.c

????.CA....?????65334??2009-12-14?02:19??實(shí)驗(yàn)4?靜態(tài)路由編程實(shí)現(xiàn).docx

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

????????????????74482????????????????????2