#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int main(int argc, char *argv[])
{
unsigned short port = 8080; // 本地端口
if(argc > 1)
{
port = atoi(argv[1]);
}
int sockfd = socket(AF_INET, SOCK_STREAM, 0); // 创建通信端点：套接字
if(sockfd < 0)
{
perror("socket");
exit(-1);
}
// 设置本地地址结构体
struct sockaddr_in my_addr;
bzero(&my_addr, sizeof(my_addr)); // 清空
my_addr.sin_family = AF_INET; // ipv4
my_addr.sin_port = htons(port); // 端口
my_addr.sin_addr.s_addr = htonl(INADDR_ANY); // ip
// 绑定
int err_log = bind(sockfd, (struct sockaddr*)&my_addr, sizeof(my_addr));
if( err_log != 0)
{
perror("binding");
close(sockfd);
exit(-1);
}
err_log = listen(sockfd, 10); // 监听，监听套接字改为被动
if(err_log != 0)
{
perror("listen");
close(sockfd);
exit(-1);
}
printf("listen client @port=%d...\n",port);
while(1)
{
struct sockaddr_in client_addr;
char cli_ip[INET_ADDRSTRLEN] = "";
socklen_t cliaddr_len = sizeof(client_addr);
int connfd;
// 等待连接
connfd = accept(sockfd, (struct sockaddr*)&client_addr, &cliaddr_len);
if(connfd < 0)
{
perror("accept");
continue;
}
inet_ntop(AF_INET, &client_addr.sin_addr, cli_ip, INET_ADDRSTRLEN);
printf("----------------------------------------------\n");
printf("client ip=%s,port=%d\n", cli_ip,ntohs(client_addr.sin_port));
char recv_buf[512] = "";
while( recv(connfd, recv_buf, sizeof(recv_buf), 0) > 0 ) // 接收数据
{
printf("\nrecv data:\n");
printf("%s\n",recv_buf);
}
close(connfd); //关闭已连接套接字
printf("client closed!\n");
}
close(sockfd); //关闭监听套接字
return 0;
}
