首先是我的一个出错提示的头文件<myerr.h>，自从用了根本停不下来啊！！！

#ifndef			_MYERR_H_

#define			_MYERR_H_

#include <stdio.h>

#include <string.h>

#include <errno.h>

extern int errno;

#define MYDBG

#ifdef MYDBG

#define PRN_ERRMSG_EXIT(errmsg) \

	({ \

		fprintf(stderr, "Say->%s : File->%s : Line->%d : Fun->%s : Cause->%s\n\r", \

			errmsg,__FILE__,__LINE__,__func__,strerror(errno)); \

			exit(-1); \

	})

#else

#define PRN_ERRMSG_EXIT(errmsg) ({exit(-1);})

#endif

#ifdef MYDBG

#define PRN_ERRMSG_RETURN(errmsg) \

	({ \

		fprintf(stderr, "Say->%s : File->%s : Line->%d : Fun->%s : Cause->%s\n\r", \

			errmsg,__FILE__,__LINE__,__func__,strerror(errno)); \

			return(-1); \

	})

#else

#define PRN_ERRMSG_RETURN(errmsg) ({return(-1);})

#endif

#ifdef MYDBG

#define PRN_ERRMSG(errmsg) \

	({ \

		fprintf(stderr, "Say->%s : File->%s : Line->%d : Fun->%s : Cause->%s\n\r", \

			errmsg,__FILE__,__LINE__,__func__,strerror(errno)); \

	})

#else

#define PRN_ERRMSG(errmsg)

#endif

#ifdef MYDBG

#define ASSERT(EXP) \

	({\

		if(!(EXP)){\

		fprintf(stderr, "Say->%s : File->%s : Line->%d : Fun->%s : Cause->%s\n\r", \

				__FILE__,__LINE__,__func__,strerror(errno)); \

				exit(-1); \

		}\

	})

#else

#define ASSERT(EXP)

#endif

#endif		   //_ERROR_H_

然后就是我编写的简便代码，方便其他地方调用额。<socket.c>

#include "mysocket.h"

int ser_socket(const char *ipstr, const unsigned short port)

{

	/*创建一个流式套接字*/

	int s = socket(PF_INET, SOCK_STREAM, 0);

	if (0 > s)

		PRN_ERRMSG_RETURN("socket");

	int on = 1;

	if (0 > setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)))

		PRN_ERRMSG_RETURN("setsockopt");

	struct sockaddr_in addr = {

		.sin_family		 =	PF_INET,

		.sin_port		 =	htons(port),

		.sin_addr.s_addr =	(NULL==ipstr)?INADDR_ANY:inet_addr(ipstr),

	};

	memset(addr.sin_zero, 0, sizeof(addr.sin_zero));

	if (0 > bind(s, (struct sockaddr*)&addr, sizeof(struct sockaddr)))

		PRN_ERRMSG_RETURN("bind");

	if (0 > listen(s, BACKLOG))

		PRN_ERRMSG_RETURN("listen");

	return s;

}

int cli_socket(const char *ipstr, const unsigned short port)

{

	/*创建一个流式套接字*/

	int s = socket(PF_INET, SOCK_STREAM, 0);

	if (0 > s)

		PRN_ERRMSG_RETURN("socket");

	struct sockaddr_in addr = {

		.sin_family		 =	PF_INET,

		.sin_port		 =	htons(port),

		.sin_addr.s_addr =	inet_addr(ipstr),

	};

	memset(addr.sin_zero, 0, sizeof(addr.sin_zero));

	if (0 > connect(s, (struct sockaddr*)&addr, sizeof(struct sockaddr)))

		PRN_ERRMSG_RETURN("connect");

	return s;

}

int my_accept(int sockFd, struct sockaddr_in *addr)

{

	socklen_t len = sizeof(struct sockaddr_in);

	memset(addr, 0, len); // 将结构体清零

	int rws = accept(sockFd, (struct sockaddr*)addr, &len);

	if (0 > rws)

		PRN_ERRMSG_RETURN("accept");

	return rws;

}

当然也要为这个文件编写头文件了。。。<mysocket.h>

#ifndef		_SOCKET_H_

#define		_SOCKET_H_

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <sys/types.h>          /* See NOTES */

#include <sys/socket.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <myerr.h>

#define BACKLOG		5		/* length of listening queue on socket */

/*

 * 服务器开启服务

 * ipstr : 服务器ip

 * port  : 绑定的端口

 * 返回  : 一个网络套接字

 */

int ser_socket(const char *ipstr, const unsigned short port);

/*

 * 客户端连接服务器

 * ipstr : 服务器ip

 * port  : 服务器的端口

 * 返回  : 一个网络套接字

 */

int cli_socket(const char *ipstr, const unsigned short port);

/*

 * 等待客户端连接

 * sockFd  : 套接字

 * addr    : 接收客户端信息

 * 返回    : 与客户端通信的文件描述副

 */

int my_accept(int sockFd, struct sockaddr_in *addr);

#endif	   //_SOCKET_H_

然后就是服务器的代码了。<main_ser.c>

#include "mysocket.h"

int main(int argc,char *argv[])

{

	int serFd = ser_socket(NULL, 8888);

	struct sockaddr_in addr;

	char buffer[1024];

	while (1) {

		int accFd = my_accept(serFd, &addr);

		while (1) {

			memset(buffer, 0, 1024);

			if (0 >= recv(accFd, buffer, 1024, 0)) {

				PRN_ERRMSG("recv");

				close(accFd);

				break;

			}

			printf("client : %s\n", buffer);

			if (0 > send(accFd, buffer, strlen(buffer), 0)) {

				PRN_ERRMSG("recv");

				close(accFd);

				break;

			}

		}

	}

	return 0;

}

然后就是客户端的代码了<main_cli.c>

#include "mysocket.h"

int main(int argc,char *argv[])

{

	int sockFd = cli_socket("127.0.0.1", 8888);

	char buffer[1024];

	while (1) {

		printf("input :");

		fgets(buffer, 1024, stdin);

		*strchr(buffer, '\n') = '\0';// 采用这种方法可以避免输入超出缓冲区

		if (0 > send(sockFd, buffer, strlen(buffer), 0)) {

			PRN_ERRMSG("recv");

			close(sockFd);

			break;

		}

		memset(buffer, 0, 1024);

		if (0 >= recv(sockFd, buffer, 1024, 0)) {

			PRN_ERRMSG("recv");

			close(sockFd);

			break;

		}

		printf("server : %s\n", buffer);

	}

	return 0;

}