client.c

这段代码是在LINUX系统下面

/* 
 * File:   cli.c
 * Author: udolf
 *
 * Created on 2009年4月27日, 上午8:31
 */

#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdlib.h>


#define PORT 5678
#define REMOTE_IP "127.0.0.1"
/*
 * 
 */
int main(int argc, char* argv[]) {
    int s;
    struct sockaddr_in addr;
    char mybuffer[256];
    
    if((s=socket(AF_INET,SOCK_STREAM,0))<0)
    {
        perror("socket");
        exit(1);
    }
    else
    {
        printf("socket created.\n");
        printf("socket id:%\n",s);
    }
        bzero(&addr,sizeof(addr));
        addr.sin_family=AF_INET;
        addr.sin_port=htons(PORT);
        addr.sin_addr.s_addr=inet_addr(REMOTE_IP);
  
    
    if(connect(s,&addr,sizeof(addr))<0)
    {
        perror("connect");
        exit(1);
    }
    else
    {
        printf("Connected ok!\n");
        printf("remote ip:%s\n",REMOTE_IP);
        printf("remote port:%d\n",PORT);
    }
    
    recv(s,mybuffer,sizeof(mybuffer),0);
    printf("%s\n",mybuffer);
    
    while(1)
    {
        bzerro(mybuffer,sizeof(mybuffer),0);
        read(STDIN_FILENO,mybuffer,sizeof(mybuffer));
        
        if(send(s,mybuffer,sizeof(mybuffer),0)<0)
        {
            perror("send");
            exit(1);
        }
        else
        {
            bzero(mybuffer,sizeof(mybuffer));
            recv(s,mybuffer,sizeof(mybuffer),0);
            printf("received:%s\n",mybuffer);
        }
    }
    return (EXIT_SUCCESS);
}