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/**
* @filename: tcp_server.c
* @brief: tcp communication
* @author: philia
* @date: 2026/4/19
* @version: ver1.0
* @note 服务端接收消息，先运行，加入10秒超时机制
* CopyRight (c) 2026 philia All Right Reseverd
*/
#include <stdio.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <netinet/ip.h> /* superset of previous */
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/select.h>
int main(int argc, const char *argv[])
{
int tcp_socket = socket(AF_INET, SOCK_STREAM, 0);
if (tcp_socket == -1)
{
fprintf(stderr, "tcp_socket error, errno:%d,%s", errno, strerror(errno));
exit(-1);
}
struct sockaddr_in host_addr;
// hostaddr结构体赋值
host_addr.sin_family = AF_INET;
host_addr.sin_port = htons(60001);
host_addr.sin_addr.s_addr = INADDR_ANY;
// 绑定地址
bind(tcp_socket, (struct sockaddr *)&host_addr, sizeof(host_addr));
// 监听
listen(tcp_socket, 5);
// 使用 setsockopt 设置接收超时机制 (Linux 系统下对 accept 也生效)
struct timeval timeout;
timeout.tv_sec = 10;
timeout.tv_usec = 0;
setsockopt(tcp_socket, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
printf("等待客户端连接，超时时间 10 秒...\n");
// 接受
struct sockaddr_in dest_addr;
socklen_t size = sizeof(dest_addr);
int accepted_tcp = accept(tcp_socket, (struct sockaddr *)&dest_addr, &size);
if (accepted_tcp == -1)
{
// 判断是否为超时引起的错误
if (errno == EAGAIN || errno == EWOULDBLOCK)
{
fprintf(stderr, "超时报错：10秒内无客户端发起连接\n");
}
else
{
perror("accept error");
}
close(tcp_socket);
exit(-1);
}
// 读取消息
char buf[128] = {0};
while (1)
{
read(accepted_tcp, &buf, sizeof(buf));
printf("read is [%s]\n", buf);
bzero(buf, sizeof(buf));
}
close(tcp_socket);
return 0;
}
