Linux下的TCP Socket简单例子

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Linux下的TCP Socket简单例子

(2013-01-23 13:06:17)

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客户端代码 client.c

#include <stdio.h>

#include <string.h>

#include <sys/socket.h>

#include <netinet/in.h>

int main(int argc, char **argv)
{
    int sockfd;
    struct sockaddr_in servaddr;

    sockfd = socket(PF_INET, SOCK_STREAM, 0);

    bzero(&servaddr, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(50001);
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));

    char sendline[100];
    sprintf(sendline, "Hello, world!");

    write(sockfd, sendline, strlen(sendline));

    close(sockfd);

    return 1;
}

服务器端代码 server.c

#include <stdio.h>

#include <string.h>

#include <sys/socket.h>

#include <netinet/in.h>

int main(int argc, char **argv)
{
    int listenfd;
    int connfd;
    struct sockaddr_in servaddr;

    listenfd = socket(PF_INET, SOCK_STREAM, 0);

    bzero(&servaddr, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port = htons(50001);

    bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr));

    listen(listenfd, 10);
    connfd = accept(listenfd, (struct sockaddr *)NULL, NULL);

    int n;
    char recvline[1024];

    while((n=read(connfd, recvline, 1024)) > 0)
    {
        recvline[n] = 0;
        printf("%s\n", recvline);
    }

    close(connfd);
    close(listenfd);

    return 1;
}

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