c socket

/*============================================================================
  Name : server.c
  Author : Vach
  Description : Hello World in C, Ansi-style
  ============================================================================*/
#include <stdlib.h>
#include <pthread.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h> /* inet(3) functions */
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>

int handle(int point);

int main(void) {
	int sfd, ind;
	struct sockaddr_in addr;
	struct sockaddr_in clent;
	char resv[1024], sendbuf[1024];
	char buf[1024];
	char * myaddr = "192.168.231.128";
	int ret; // 返回值设置
	socklen_t lent;
	int pid;
	addr.sin_family = AF_INET; //IPv4 Internet protocols
	addr.sin_port = htons(5050); //这里输入服务器端口号
	addr.sin_addr.s_addr = inet_addr(myaddr);; //INADDR_ANY表示本机IP//獲取socket描述符，IPV4asd
	printf("socket start n");
	sfd = socket(AF_INET, SOCK_STREAM, 0);
	if (sfd < 0) {
		printf("socket error n");
		return -1;
	}
	printf("bind start n");//将套接子与指定端口链接
	if (bind(sfd, (struct sockaddr *) &addr, sizeof(struct sockaddr)) < 0) 
	{
		printf("bind error n");
		return -1;
	}//监听套接子
	printf("listen start n");
	if (listen(sfd, 1024) < 0) 
	{
		printf("listen error n");
		return -1;}
	for (;;) 
	{
		//接受来自客户端的信息
		printf("accept start n");
		memset(&clent, 0, sizeof(clent));
		lent = sizeof(clent);
		ind = accept(sfd, (struct sockaddr *) &clent, &lent);
		if (ind < 0) 
		{
			printf("accept error %d n", ind);
			return -1;
		}
		printf("infor n");
		printf("clent addr%s porit %dn",inet_ntop(AF_INET, &clent.sin_addr, buf, sizeof(buf)),ntohs(clent.sin_port));
		pid = fork();
		if (pid == 0) 
		{//子进程
			close(sfd);
			handle(ind);
		} else if (pid < 0) 
		{
			//error
			close(ind);
		} else 
		{//父进程
		}
	}
	return EXIT_SUCCESS;
}
int handle(int point) 
{
	int retn;char buf[1024];
	for (;;)
	{
		retn = read(point, buf, sizeof(buf));
		if (retn < 0) 
		{
			printf("read error n");
			close(point);
			break;
		} else if (retn == 0) 
		{
			printf("client exit n");
			close(point);
			break;
		}
		printf("client:%sn", buf);
		if (strcmp("exit", buf) == 0) 
		{
			printf("exit n");
			close(point);
			return 0;
		}
		return 0;
	}

/* ============================================================================ 
   Name : client.c 
   Author : Vach 
   Version : 
   Description : Hello World in C, Ansi-style 
   ============================================================================ */ 
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h> /* inet(3) functions */ 

int handle(int fd); 
int main(void) 
{  
	int nsd; char buf[1024];  
	char * myaddr = "192.168.231.128"; 
	struct sockaddr_in addr;  
	printf("welcome to echo clientn"); 
	nsd = socket(AF_INET, SOCK_STREAM, 0); 
	printf("connect start1 n"); 
	//bzero(addr, sizeof(*addr)); 
	memset(&addr,0,sizeof(addr)); 
	printf("connect start2 n"); 
	addr.sin_family = AF_INET; 
	addr.sin_port = htons(5050); 
	addr.sin_addr.s_addr=inet_addr(myaddr);  
	printf("connect start3 n"); 
	if (connect(nsd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) < 0) 
	{ 
		printf("connect error n"); 
		return -1; 
	}  
	sleep(5);
	printf("handle startn"); 
	handle(nsd); 
	close(nsd); 
	return EXIT_SUCCESS;
} 

int handle(int fd) 
{  
	char sendl[1024], rev[1024];  int retn;  
	for (;;) 
	{  
		memset(sendl,0,sizeof(sendl)); 
		memset(rev,0,sizeof(rev)); 
		if (fgets(sendl, 1024, stdin) == NULL) 
		{ 
			break; 
		} // printf("wirte startn"); 
		write(fd, sendl, strlen(sendl)); 
		read(fd, rev,strlen(rev));  
	}  
	return 0;
}