linux tcp server

#include <stdio.h>
#include<stdlib.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<arpa/inet.h>
#include<string.h>
#include<unistd.h>
int main(int argc,void *argv[])
{
	int listenfd;
	listenfd=socket(AF_INET,SOCK_STREAM,0);
	struct sockaddr_in srv_addr;
	srv_addr.sin_family=AF_INET;
	srv_addr.sin_port=htons(9001);
	srv_addr.sin_addr.s_addr=htonl(INADDR_ANY);
	int ret;
	ret=bind(listenfd,(struct sockaddr*)&srv_addr,sizeof(struct sockaddr));
	if(ret<0){
		perror("bind");
	}	

	listen(listenfd,20);
	
	while(1)
	{
		int comfd;
		struct sockaddr_in clt_addr;
		int len;
		len=sizeof(clt_addr);
		comfd=accept(listenfd,(struct sockaddr*)&clt_addr,&len);
		if(comfd<0){
			perror("accept");
		}
		write(comfd,"hello client",12);
		close(comfd);
	}
	return 0;
}