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unix socket网络编程TCP简单例子

发表于：2025-12-02 作者：千家信息网编辑

千家信息网最后更新 2025年12月02日，server.c#include #include #include #include #include #include #include #include int main(int

千家信息网最后更新 2025年12月02日unix socket网络编程TCP简单例子

server.c
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char** argv)
{
int ret;
//创建socket文件
int sockfd = socket(AF_INET, SOCK_STREAM, 0);
if(sockfd == -1)
{
perror("socket\n");
exit(1);
}
printf("socket_fd = %d\n",sockfd);
//重复使用本地址与socket文件进行绑定，如果不设置系统，会保留此连接直到最后一引用才释放，即进程结束后系统需要几分钟后才能重新进行绑定
int i = 1;
ret = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
if(ret)
{
perror("setsockopt\n");
exit(1);
}
printf("setsockopt complete!\n");
//创建服务器socket地址sock_addr
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(4444);
//地址指定INADDR_ANY表示可以接收安装在系统里面所有网卡的数据包
server_addr.sin_addr.s_addr = INADDR_ANY;
memset(server_addr.sin_zero, 8, 8);
//将socket与地址进行绑定，这样可以使所有发向端口4444及协议为IPV4数据包指向socket文件
ret = bind(sockfd, (struct sockaddr*)&server_addr, sizeof(struct sockaddr));
if(ret)
{
perror("bind\n");
exit(1);
}
printf("bind complete!\n");
//监听连接到该socket上请求,不会发生阻塞行为，以下设置队列大小为1，即队列满的时候其它连接会被拒绝连接
ret = listen(sockfd, 10);
if(ret)
{
perror("listen\n");
exit(1);
}
printf("listen complete!\n");
//接收连接请求并建立连接, 如果没有连接请求 accept会一址阻塞，直到有请求来
struct sockaddr_in client_addr;
int client_fd;
socklen_t len = sizeof(struct sockaddr);
client_fd = accept(sockfd, (struct sockaddr*)&client_addr, &len);
if(client_fd == -1)
{
perror("bind\n");
exit(1);
}
printf("accept complete!\n");
//请取client发来的信息
char buf[100];
ssize_t readnum;
memset(buf,100,0);
//这里应该是客户端的socket文件描述符
readnum = recv(client_fd, (void*)buf, 100, MSG_WAITALL);
//清空标准输出
fflush(stdout);
printf("received:%s\nnumber byte:%d\n",buf,strlen(buf));
//发送信息到用户端
ssize_t sendnum;
char content[100]="\"server:received the data!\"";
sendsendnum = send(client_fd, content, 100, 0);
printf("reply:%s\nnumber byte:%d\n",content,sendnum);
// 关闭socket文件
close(sockfd);
close(client_fd);
return 0;
}
client.c
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <unistd.h>
#include <arpa/inet.h>
int main(int argc, char** argv)
{
int ret;
//创建socket文件
int sockfd = socket(AF_INET, SOCK_STREAM, 0);
if(sockfd == -1)
{
perror("socket\n");
exit(1);
}
printf("socket_fd = %d\n",sockfd);
//创建服务器socket地址sock_addr
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(4444);
//将字符串地址转换成网络地址，有两种方法
inet_pton(AF_INET, "127.0.0.1", (void*)&server_addr.sin_addr.s_addr);//IPV4 IPV6可用
//server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");//只能转IPV4
memset(server_addr.sin_zero, 8, 0);
//连接服务端
ret = connect(sockfd, (struct sockaddr*)&server_addr,sizeof(struct sockaddr));
if(ret == -1)
{
perror("connect\n");
exit(1);
}
printf("connect complete!\n");
//发送信息
char content[100] = "\"hello,i am client!\"";
ssize_t sendsendnum = send(sockfd, content, strlen(content)+1, 0);
printf("send complete\nnumber byte:%d\ncontent:%s\n",sendnum,content);
//收信息
char buf[100];
ssize_t readnum;
memset(buf,100,0);
readnum = recv(sockfd, (void*)buf, 100, MSG_WAITALL);
//清空标准输出
fflush(stdout);
printf("received:%s\nnumber byte:%d\n",buf,strlen(buf));
//关闭socket
close(sockfd);
return 0;
}