网络编程day3

#include
#define SERPORT 8888
#define SERIP "192.168.125.91"

#define CLIPORT 6213
#define CLIIP "192.168.125.93"
int main(int argc, const char *argv[])
{
    //1、创建用于通信的套接字
    int cfd = -1;
    if((cfd=socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
        perror("socket error");
        return -1;
    }
    printf("cfd = %d\n", cfd);           //3

    //将端口号快速重用
    int reuse = 1;
    if(setsockopt(cfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))==-1)
    {   
        perror("setsockopt error");
        return -1;                                                                     
    }  

    //2、可以绑定也可以不绑定
    //2.1 填充地址信息结构体
    struct sockaddr_in cin;
    cin.sin_family = AF_INET;
    cin.sin_port =         htons(CLIPORT);
    cin.sin_addr.s_addr = inet_addr(CLIIP);
    //2.2 绑定
    if(bind(cfd, (struct sockaddr *)&cin, sizeof(cin)) == -1)
    {
        perror("bind error");
        return -1;
    }
    
    //3、连接服务器
    //3.1 填充服务器地址信息结构体
    struct sockaddr_in sin;
    sin.sin_family =     AF_INET;    //地址族
    sin.sin_port =         htons(SERPORT);   //服务器端口号
    sin.sin_addr.s_addr = inet_addr(SERIP);   //服务器IP地址
	//3.2 连接服务器
	if(connect(cfd, (struct sockaddr*)&sin, sizeof(sin)) == -1)
	{
		perror("connect error");
		return -1;
	}
	printf("connect success\n");

	//4、数据收发
	char wbuf[5] = {0xff,0x02,0x00,0x00,0xff};
	unsigned char buf[5] = {0xff,0x02,0x01,0x00,0xff};
			send(cfd, wbuf, sizeof(wbuf), 0);
			send(cfd, buf, sizeof(buf), 0);
			char value;
	while(1)
	{
	//输入内容
		value=getchar();
		switch (value)
		{
	case 'w':
	case 'W':
			wbuf[3]+=10;
			if(-90<=wbuf[3]<=90)
			{
			send(cfd, wbuf, sizeof(wbuf), 0);
			}
			else
			{
			wbuf[3]-=10;
			}
			
			break;
	case 's':
	case 'S':
			wbuf[3]-=10;
			if(-90<=wbuf[3]<=90)
			{
			send(cfd, wbuf, sizeof(wbuf), 0);
			}
			else
			{
			wbuf[3]+=10;
			}
			break;
	case 'a':
	case 'A':
			buf[3]-=10;
			if(0<=buf[3]<=180)
			{
			send(cfd, buf, sizeof(buf), 0);
			}
			else
			{
			buf[3]+=10;
			}
			break;
	case 'd':
	case 'D':
			buf[3]+=10;
			if(0<=buf[3]<=180)
			{
			send(cfd, buf, sizeof(buf), 0);
			}
			else
			{
			buf[3]-=10;
			}
			break;
		}
	}
	//5、关闭套接字
	close(cfd);
	return 0;
}