server.c

linux环境下上下位机网络通讯服务器和客户端

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

int main()
{
	int server_sockfd, client_sockfd;
	int server_len, client_len;
	struct sockaddr_in server_address;
	struct sockaddr_in client_address;
	server_sockfd = socket(AF_INET, SOCK_STREAM, 0);
	server_address.sin_family = AF_INET;
	server_address.sin_addr.s_addr = inet_addr("192.168.0.22");
	server_address.sin_port = 9734;
	server_len = sizeof(server_address);
	bind(server_sockfd, (struct sockaddr *)&server_address, server_len);
	
	listen(server_sockfd, 5);
	while(1)
	{
		char str[10];
		char str1[10];
		int i;

		printf("server waiting\n");
		client_len = sizeof(client_address);
		client_sockfd = accept(server_sockfd, (struct sockaddr *)&client_address, &client_len);
		read(client_sockfd, &str[0], 10);
		for(i=0; i<10; i++)
		{
			str1[i]=str[9-i];
		}
		write(client_sockfd, &str1[0], 10);
		close(client_sockfd);
	}
}