xqd_server.c

这是一个简单的复数计算器

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <netinet/in.h>
#define SERVPORT 3333
#define BACKLOG 10
#define MAX_CONNECTED_NO 10
#define MAXDATASIZE 5

int main()
{
	struct sockaddr_in server_sockaddr,client_sockaddr;
	int sin_size,sendbytes;
	int sockfd,client_fd;
	int fd,size;
	char buf[MAXDATASIZE];
	if((sockfd = socket(AF_INET,SOCK_STREAM,0))==-1){
		perror("socket");
		exit(1);
	}
	printf("socket success!,sockfd=%d\n",sockfd);
	server_sockaddr.sin_family=AF_INET;
	server_sockaddr.sin_port=htons(SERVPORT);
	server_sockaddr.sin_addr.s_addr=INADDR_ANY;
	bzero(&(server_sockaddr.sin_zero),8);
	if(bind(sockfd,(struct sockaddr *)&server_sockaddr,sizeof(struct sockaddr))==-1){
		perror("bind");
		exit(1);
	}
	printf("bind success!\n");
	if(listen(sockfd,BACKLOG)==-1){
		perror("listen");
		exit(1);
	}
	printf("listening....\n");
	if((client_fd=accept(sockfd,(struct sockaddr *)&client_sockaddr,&sin_size))==-1){
		perror("accept");
		exit(1);
	}

        if((fd=open("./hello1.c",O_CREAT|O_TRUNC|O_WRONLY,0600))<0)
	  {
	    perror("open:");
	    exit(1);
	  }
	
	    while((size=read(fd,buf,100))>=0)
	      {
		if((sendbytes=send(client_fd,buf,size,0))==-1)
		  {
		    perror("send");
		    exit(1);
		  }
	      }
	printf("send a file!\n");
	close(sockfd);
	}