server.c~

unix高级编程开发环境

/* server.c */

#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdlib.h>

#define MYPORT 4000 
#define BACKLOG 10
#define DEFAULT_IP "219.225.51.250"

int main()
{
	int sockzw,sockbd,newzw,sin_size;
	struct sockaddr_in my_addr;
	struct sockaddr_in cl_addr;
	
	sockzw = socket(AF_INET, SOCK_STREAM, 0); 
	my_addr.sin_family = AF_INET; /* host byte order */ 
	my_addr.sin_port = htons(MYPORT); /* short, network byte order */ 
	my_addr.sin_addr.s_addr = inet_addr(DEFAULT_IP); 
	bzero(&(my_addr.sin_zero),8); /* zero the rest of the struct */

	printf("the IPADDR is:%d\n",sockzw); 
	
	/* don't forget your error checking for bind(): */ 
	sockbd = bind(sockzw,(struct sockaddr*)&my_addr,sizeof(struct sockaddr));
	printf("the sockbd is :%d\n",sockbd);

	if (sockbd==-1)
	{
		perror("bind failure!\n");
	}
	else
	{	
		printf("bind success!\n"); 
	}

	if (listen(sockzw, BACKLOG) == -1)
	{
		perror("listen.....");
		exit(1);
	}
	else
	{
		printf("listen success!\n");
	}

	
while(1)
 { printf("Waiting for client!\n");
   sin_size=sizeof(struct sockaddr_in);
  if((newzw=accept(sockzw,(struct sockaddr*)&cl_addr,&sin_size))==-1)
     {perror("accept....");
      continue;  }
  else
    printf("accept success!\n");
 
if(!fork())
 {if(send(newzw,"hello,zhongwei!\n",14,0)==-1)
  {perror("send.....");
   close(newzw);
   exit(0);
  }
  printf("send success!\n");
  close(newzw);
 }
 waitpid(-1,NULL,WNOHANG)>0;
}
}