计网：IP分组转发协议实验(c语言)

#include
#include
#include
#include
typedef struct ip{
	unsigned char one;
	unsigned char two;
	unsigned char three;
	unsigned char four;
}IP;
typedef struct message{
	IP sourceIP;
	IP targetIP;
	unsigned int data;
}MG;
typedef struct routertable{
	IP ip;
	unsigned char port;
	IP mask;
}RTAB;
typedef struct router{
	unsigned char id;
	IP ip1;
	IP ip2;
	RTAB rtab[100];
	unsigned char len;
}ROT;
void init(ROT *R,int len);
int main(){
	MG msg;
	ROT R[2];
	unsigned char t=10;
	init(R,2);
	msg.sourceIP.one=23;
	msg.sourceIP.two=24;
	msg.sourceIP.three=25;
	msg.sourceIP.four=26;
	while(t--){
		Sleep(1000);
		srand((unsigned)time(NULL));
		switch(rand()%3){
			case 0:{
				msg.data=t;
				msg.targetIP.one=58;
				msg.targetIP.two=rand()%256;
				msg.targetIP.three=rand()%256;
				msg.targetIP.four=rand()%256;
				break;
			}
			case 1:{
				msg.data=t;
				msg.targetIP.one=192;
				msg.targetIP.two=32;
				msg.targetIP.three=63;
				msg.targetIP.four=rand()%256;
				break;
			}
			case 2:{
				msg.data=t;
				msg.targetIP.one=128;
				msg.targetIP.two=54;
				msg.targetIP.three=rand()%256;
				msg.targetIP.four=rand()%256;
				break;
			}
			default :{
				msg.data=t;
				msg.targetIP.one=rand()%254+1;
				msg.targetIP.two=rand()%254+1;
				msg.targetIP.three=rand()%254+1;
				msg.targetIP.four=rand()%254+1;
				break;
			};
		}
		printf("%d号消息开始发送:n",10-t);
		printf("源IP地址:%d.%d.%d.%dn",msg.sourceIP.one,msg.sourceIP.two,msg.sourceIP.three,msg.sourceIP.four);
		printf("目的IP地址:%d.%d.%d.%dn",msg.targetIP.one,msg.targetIP.two,msg.targetIP.three,msg.targetIP.four);
		
		int i,sig=0;
		printf("到达路由器%cn",R[0].id);
		for(i=0;i