Linux 下简单TCP通信程序

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最新推荐文章于 2024-11-25 21:43:39 发布

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本文介绍了一个简单的TCP聊天程序实现，包括服务端与客户端代码。该程序使用C语言编写，通过socket编程实现双向通信。服务端监听指定端口，接收客户端发来的消息并打印；客户端连接服务端后发送预定义的字符串“exit”终止会话。

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服务端

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <unistd.h>
#include <stdlib.h>
int main(int argc,char *argv[])
{
    int server_sockfd;
    int client_sockfd;
    int server_len, client_len;
    struct sockaddr_in server_address;
    int byte;
    char char_recv[100];
    //创建套接字
    server_sockfd = socket(AF_INET, SOCK_STREAM, 0);

    server_address.sin_family = AF_INET;
    server_address.sin_addr.s_addr =  htonl(INADDR_ANY);
    server_address.sin_port = htons(8701);
    server_len = sizeof(server_address);

    //绑定套接字
    bind(server_sockfd, (struct sockaddr *)&server_address, server_len);
    //监听套接字
    listen(server_sockfd, 5);
    
    printf("server waiting for connect\n");
    //等待客户端连接
    client_sockfd = accept(server_sockfd, NULL, NULL);
    if(-1 == client_sockfd)
    {
        perror("accept");
        exit(0);
    }
    for(;;)
    {
        if((byte = recv(client_sockfd, char_recv, 100, 0)) == -1)
        {
            perror("recv");
            exit(EXIT_FAILURE);
        }
        if(strcmp(char_recv, "exit") == 0)//接受到exit时，跳出循环
            break;
        printf("receive from client is %s\n",char_recv);//打印收到的数据
    }
    close(client_sockfd);
    close(server_sockfd);
}

客户端

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
int main(int argc,char *argv[])
{
    int sockfd;
    int len;
    struct sockaddr_in address;
    int result;
    int i,byte;
    char char_send[100] = { 0 };
    //创建套接字
    if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
        perror("socket");
        exit(EXIT_FAILURE);
    }
    bzero(&address, sizeof(address));
    address.sin_family = AF_INET;
    address.sin_port = htons(8701);
    inet_pton(AF_INET, "192.168.1.11", &address.sin_addr);
    len = sizeof(address);
    //连接服务端进行握手
    if((result = connect(sockfd, (struct sockaddr *)&address, len)) == -1)
    {
        perror("connect");
        exit(EXIT_FAILURE);
    }
    char_send[0] = 'e';
    char_send[1] = 'x';
    char_send[2] = 'i';
    char_send[3] = 't';
    //如果输入exit，跳出循环
    if((byte = send(sockfd, char_send, 100, 0)) == -1)
    {
        perror("send");
        exit(EXIT_FAILURE);
    }
    close(sockfd);
}