TCP_SER

#include <myhead.h>

//定义处理错误的宏函数
#define ERR_MSG(msg) do{\
	fprintf(stderr,"line:%d   %s   %s",__LINE__, __FILE__, __func__);\
	perror(msg);\
}while(0)

//定义IP和端口号
#define IP "192.168.2.186"
#define PORT 6666

int main(int argc, const char *argv[])
{
	//1> 创建流式套接字socket

	int sfd = socket(AF_INET, SOCK_STREAM, 0);
	if(sfd < 0)
	{
		ERR_MSG("socket");
		return -1;
	}
	
	//2> 绑定服务器ip和端口bind
	//真实地址信息结构体
	struct sockaddr_in sin;
	sin.sin_family      = AF_INET;
	sin.sin_port        = htons(PORT);
	sin.sin_addr.s_addr = inet_addr(IP);
	
	if(bind(sfd, (struct sockaddr*)&sin, sizeof(sin)) < 0)
	{
		ERR_MSG("bind");
		return -1;
	}

	//3> 设置为被动监听状态listen
	if(listen(sfd, 128) < 0)
	{
		ERR_MSG("listen");
		return -1;
	}

	//4> 获取连接成功的套接字accept
	//获取接收的地址信息结构体
	struct sockaddr_in cin;
	socklen_t addrlen = sizeof(cin);

	int newfd = accept(sfd, (struct sockaddr*)&cin, &addrlen);
	if(newfd < 0)
	{
		ERR_MSG("accept");
		return -1;
	}
	printf("[%s:%d] 客户端连接成功 newfd = %d\n",\
			inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), newfd);

	while(1)
	{
		//5> 接收recv
		char buf[128] = "";
		//清
		bzero(buf, sizeof(buf));
		//收
		ssize_t res = recv(newfd, buf, sizeof(buf), 0);
		if(res < 0)
		{
			ERR_MSG("recv");
			return -1;
		}
		else if(res == 0)
		{
			printf("[%s:%d] 客户端下线 newfd = %d\n",\
					inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), newfd);
			break;
		}
	
		printf("[%s:%d] newfd = %d : %s\n",\
					inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), newfd, buf);
		//6> 发送send
		strcat(buf, "***");
		if(send(newfd, buf, sizeof(buf), 0) < 0)
		{
			ERR_MSG("send");
			return -1;
		}
	}
		
	//7> 关闭
	close(newfd);
	close(sfd);	
	return 0;
}

TCP_CLI

#include <myhead.h>

//定义处理错误的宏函数
#define ERR_MSG(msg) do{\
	fprintf(stderr,"line:%d   %s   %s",__LINE__, __FILE__, __func__);\
	perror(msg);\
}while(0)

//定义IP和端口号
#define IP "192.168.2.186"
#define PORT 6666

int main(int argc, const char *argv[])
{
	//1> 创建流式套接字socket

	int cfd = socket(AF_INET, SOCK_STREAM, 0);
	if(cfd < 0)
	{
		ERR_MSG("socket");
		return -1;
	}
	
	//真实地址信息结构体
	struct sockaddr_in sin;
	sin.sin_family      = AF_INET;
	sin.sin_port        = htons(PORT);
	sin.sin_addr.s_addr = inet_addr(IP);

	//2> 连接服务器connect
	if(connect(cfd, (struct sockaddr*)&sin, sizeof(sin)) < 0)
	{
		ERR_MSG("connect");
		return -1;
	}

	while(1)
	{
		//3> 发送send
		char buf[128] = "";
		fgets(buf, sizeof(buf), stdin);
		buf[strlen(buf) -1 ] = '\0';
		if(send(cfd, buf, sizeof(buf), 0) < 0)
		{
			ERR_MSG("send");
			return -1;
		}

		//4> 接收recv
		//清
		bzero(buf, sizeof(buf));
		//收
		ssize_t res = recv(cfd, buf, sizeof(buf), 0);
		if(res < 0)
		{
			ERR_MSG("recv");
			return -1;
		}
		else if(res == 0)
		{
			printf("服务器下线\n");
			break;
		}
		printf("cfd = %d : %s\n", cfd, buf);
	}

	//5> 关闭
	close(cfd);	
	return 0;
}

UDP_SER

#include <myhead.h>

//定义处理错误的宏函数
#define ERR_MSG(msg) do{\
	fprintf(stderr,"line:%d   %s   %s",__LINE__, __FILE__, __func__);\
	perror(msg);\
}while(0)

//定义IP和端口号
#define IP "192.168.2.186"
#define PORT 6666

int main(int argc, const char *argv[])
{
	//1> 创建报式套接字
	int sfd = socket(AF_INET, SOCK_DGRAM, 0);
	if(sfd < 0)
	{
		ERR_MSG("socket");
		return -1;
	}

	//2> 绑定服务器
	//真实地址信息结构体
	struct sockaddr_in sin;
	sin.sin_family      = AF_INET;
	sin.sin_port        = htons(PORT);
	sin.sin_addr.s_addr = inet_addr(IP);

	if(bind(sfd, (struct sockaddr*)&sin, sizeof(sin)) < 0)
	{
		ERR_MSG("bind");
		return -1;
	}

	while(1)
	{
		char buf[128] = "";
		struct sockaddr_in cin;
		socklen_t addrlen = sizeof(cin);
		//3> 接收
		bzero(buf, sizeof(buf));
		if(recvfrom(sfd, buf, sizeof(buf), 0, (struct sockaddr*)&cin, &addrlen) < 0)
		{
			ERR_MSG("recvfrom");
			return -1;
		}
		printf("[%s:%d] : %s\n", inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), buf);
	
		//4> 发送
		strcat(buf, "***");
		if(sendto(sfd, buf, sizeof(buf), 0, (struct sockaddr*)&cin, addrlen) < 0)
		{
			ERR_MSG("sendto");
			return -1;
		}
	}

	//5> 关闭
	close(sfd);
	
	return 0;
}

UDP_CLI

#include <myhead.h>

//定义处理错误的宏函数
#define ERR_MSG(msg) do{\
	fprintf(stderr,"line:%d   %s   %s",__LINE__, __FILE__, __func__);\
	perror(msg);\
}while(0)

//定义IP和端口号
#define IP "192.168.2.186"
#define PORT 6666

int main(int argc, const char *argv[])
{
	//1> 创建报式套接字
	int sfd = socket(AF_INET, SOCK_DGRAM, 0);
	if(sfd < 0)
	{
		ERR_MSG("socket");
		return -1;
	}

	//2> 绑定服务器
	//真实地址信息结构体
	struct sockaddr_in sin;
	sin.sin_family      = AF_INET;       
	sin.sin_port        = htons(PORT);    
	sin.sin_addr.s_addr = inet_addr(IP); 

	while(1)
	{
		char buf[128] = "";
		socklen_t addrlen = sizeof(sin);
		//3> 发送
		fgets(buf, sizeof(buf), stdin);
		buf[strlen(buf)-1] = '\0';

		if(sendto(sfd, buf, sizeof(buf), 0, (struct sockaddr*)&sin, addrlen) < 0)
		{
			ERR_MSG("send");
			return -1;
		}

		bzero(buf, sizeof(buf));
		//4> 接收
		if(recvfrom(sfd, buf, sizeof(buf), 0, (struct sockaddr*)&sin, &addrlen) < 0)
		{
			ERR_MSG("recv");
			return -1;
		}
		printf("[%s:%d] : %s\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), buf);
	}	


	//5> 关闭
	close(sfd);
	return 0;
}