#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <netdb.h>#include <time.h>#include <string.h>#define HOSTLEN 256#define BACKLOG 1int make_server_socket_q(int, int);int make_server_socket(int portnum){	return make_server_socket_q(portnum, BACKLOG);}int make_server_socket_q(int portnum, int backlog){	struct sockaddr_in saddr;	struct hostent *hp;	char hostname[HOSTLEN];	int sock_id;		sock_id = socket(PF_INET, SOCK_STREAM, 0);	if(sock_id == -1)		return -1;			bzero((void *)&saddr, sizeof(saddr));	gethostname(hostname, HOSTLEN);	saddr.sin_port = htons(portnum);	saddr.sin_family = AF_INET;	if(bind(sock_id, (struct sockaddr *)&saddr, sizeof(saddr)) != 0)		return -1;			if(listen(sock_id, backlog) != 0)		return -1;	return sock_id;		}int connet_to_server(char *host, int portnum){	int sock;	struct sockaddr_in servadd;	struct hostent *hp;		sock = socket(AF_INET, SOCK_STREAM, 0);	if(sock == -1)		return -1;			bzero(&servadd, sizeof(servadd));	hp = gethostbyname(host);	if(hp == NULL)		return -1;	bcopy(hp->h_addr, (struct sockaddr *)&servadd.sin_addr, hp->h_length);	servadd.sin_port = htons(portnum);	servadd.sin_family = AF_INET;		if(connect(sock, (struct sockaddr *)&servadd, sizeof(servadd)) != 0)		return -1;	return sock;		}