server.c

linxu socket 的服务端

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/tcp.h>
#include <time.h>

int main()
{
	int fd;
	int address_len;
	struct sockaddr_in address;
	fd_set fdset,fcset;
	FILE *fb;
	fd = socket(AF_INET, SOCK_STREAM, 0);

	address.sin_family = AF_INET;
	address.sin_addr.s_addr = htonl(INADDR_ANY);
	address.sin_port = htons(8888);
	address_len = sizeof(address);
	
	bind(fd, (struct sockaddr *)&address, address_len);
	listen(fd, 64);
	while(1)
	{
		struct sockaddr_in client_address;
		int len,z;
		int client_sockfd;
		char data_send[29467],data_recv[20];
		struct timeval timeout;
		int on = 1;

		timeout.tv_sec = 1;
		timeout.tv_usec = 0;

		FD_ZERO(&fdset);
		FD_CLR(fd, &fdset);
		FD_SET(fd, &fdset);

		if((select(fd+1, &fdset, NULL, NULL, &timeout))< 0)
		{
			printf("cannot select.\n\r");
		}
		
		if ((fb = fopen("Blue.jpg","rb")) == NULL)
		{
			printf("Open faile!!!");
			exit(0);
		}	
		

		if(FD_ISSET(fd, &fdset))
		{
			len = sizeof(client_address);
			client_sockfd = accept(fd, (struct sockaddr *)&client_address, &len);
			setsockopt(client_sockfd,IPPROTO_TCP,TCP_NODELAY,(char*)&on,sizeof on);
			
			FD_ZERO(&fcset);
			FD_CLR(client_sockfd,&fcset);
			FD_SET(client_sockfd,&fcset);			
			
			select(client_sockfd+1,&fcset,NULL,NULL,&timeout);
			//strcpy(data_send,"wowowowhaha");

			//fread(buff_send,1,11740,fp);
			//z = send(s,buff_send,11740,0);

			fread(data_send,28468.2,1,fb);
			//z = send(s,buff_send,11740,0);

			//z = send(client_sockfd,data_recv, 20,0);
			z = send(client_sockfd,htonl(data_send), 28468.2,0);

			/*
		        while(z>0)
			{
				z = send(client_sockfd,data_send,20,0);
				//if(z<=0)
				//break;
					
				if(FD_ISSET(client_sockfd,&fcset))
				//printf("read buff=%s\n\r",data_recv);
				z = recv(client_sockfd,data_recv,20,0);
				usleep(10000);
			}
			*/
			printf("close socket now\n\r");
			close(fb);
			close(client_sockfd);
				
		} 

	}

}