74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <sys/types.h>
|
||
#include <sys/socket.h>
|
||
#include <netinet/in.h>
|
||
#include <arpa/inet.h>
|
||
#include <fcntl.h>
|
||
#include <unistd.h>
|
||
#include <netinet/tcp.h>
|
||
#include <netdb.h>
|
||
#include <errno.h>
|
||
|
||
int main(int argc, const char * argv[]) {
|
||
// insert code here...
|
||
printf("Hello, World!\n");
|
||
|
||
int server_sockfd; //服务端套接字
|
||
int client_sockfd; //客户端套接字
|
||
int len;
|
||
struct sockaddr_in my_add; //服务器网络地址结构体
|
||
struct sockaddr_in remote_addr; //客户端网络地址结构体
|
||
socklen_t sin_size;
|
||
char buf[BUFSIZ]; //数据传送的缓冲区
|
||
memset(&my_add,0,sizeof(my_add)); //数据初始化--清零
|
||
my_add.sin_family = AF_INET; //设置为IP通信
|
||
my_add.sin_addr.s_addr = INADDR_ANY; //服务器IP地址--允许连接到所有本地地址上
|
||
my_add.sin_port = htons(8000); //服务器端口号
|
||
|
||
//创建服务器端套接字--IPV4协议 ，面向连接通信，TCP协议
|
||
if((server_sockfd=socket(PF_INET, SOCK_STREAM, 0))<0) {
|
||
perror("socket");
|
||
return 1;
|
||
}
|
||
|
||
//将套接字绑定到服务器的网络地址上
|
||
if (bind(server_sockfd, (struct sockaddr *)&my_add, sizeof(struct sockaddr))<0) {
|
||
perror("bind");
|
||
return 1;
|
||
}
|
||
|
||
//监听连接请求--监听队列长度为5
|
||
listen(server_sockfd, 5);
|
||
sin_size = sizeof(struct sockaddr_in);
|
||
|
||
//等待客户端连接请求到达
|
||
if ((client_sockfd=accept(server_sockfd, (struct sockaddr *)&remote_addr, &sin_size))<0) {
|
||
perror("accept");
|
||
return 1;
|
||
}
|
||
|
||
printf("accept client %s\n",inet_ntoa(remote_addr.sin_addr));
|
||
len = send(client_sockfd, "welcome to my server\n", 21, 0); //发送欢迎信息
|
||
|
||
//接受客户端的数据并将其发送给客户端--recv返回接收到的字节数，send返回发送的字节数
|
||
while (1) {
|
||
memset(buf,0,sizeof(buf));
|
||
len = recv(client_sockfd, buf, BUFSIZ, 0);
|
||
send(client_sockfd,buf, len, 0);
|
||
buf[len]='\0';
|
||
printf("receive:%s\n",buf);
|
||
if(buf[0]=='q'){
|
||
send(client_sockfd,'q', 1, 0);
|
||
break;
|
||
}
|
||
}
|
||
|
||
close(client_sockfd);
|
||
close(server_sockfd);
|
||
|
||
return 0;
|
||
}
|
||
|