/*
	Copyright (C) 1991, Marcus J. Ranum. All rights reserved.
*/

/*
code to interface client MUDs with rwho server

this is a standalone library.
*/

#include	<stdio.h>
#include	<ctype.h>
#ifdef VMS
#include        "tintop_dec:[amolitor.foo]types.h"
#include        "tintop_dec:[amolitor.foo]socket.h"
#include        "tintop_dec:[amolitor.foo]in.h"
#include        "tintop_dec:[amolitor.foo]netdb.h"
#else
#include	<fcntl.h>
#include	<sys/file.h>
#include	<sys/time.h>
#include	<sys/types.h>
#include	<sys/socket.h>
#include	<netinet/in.h>
#include	<netdb.h>
#include	<string.h>
#endif /* VMS */

#include	"config.h"
#ifdef MUDWHO /* Whole file depends on this */
#include	"lint.h"

#define	DGRAMPORT		6888

#ifndef	NO_HUGE_RESOLVER_CODE
extern	struct	hostent	*gethostbyname();
#endif

extern	char	*malloc();


static	int	dgramfd = -1;
static	char	*password;
static	char	*localnam;
static	char	*lcomment;
static	struct	sockaddr_in	addr;
extern	int	current_time;

/* enable RWHO and send the server a "we are up" message */
int rwhocli_setup(server,serverpw,myname,comment)
char	*server;
char	*serverpw;
char	*myname;
char	*comment;
{
#ifndef	NO_HUGE_RESOLVER_CODE
	struct	hostent		*hp;
#endif
	char			pbuf[512];
	char			*p;

	if(dgramfd != -1)
		return(1);

	password = malloc(strlen(serverpw) + 1);
	localnam = malloc(strlen(myname) + 1);
	lcomment = malloc(strlen(comment) + 1);
	if(password == (char *)0 || localnam == (char *)0 || lcomment == (char *)0)
		return(1);
	strcpy(password,serverpw);
	strcpy(localnam,myname);
	strcpy(lcomment,comment);

	p = server;
	while(*p != '\0' && (*p == '.' || isdigit(*p)))
		p++;

	if(*p != '\0') {
#ifndef	NO_HUGE_RESOLVER_CODE
		if((hp = gethostbyname(server)) == (struct hostent *)0)
			return(1);
		(void)bcopy(hp->h_addr,(char *)&addr.sin_addr,hp->h_length);
#else
		return(1);
#endif
	} else {
		unsigned long	f;

		if((f = inet_addr(server)) == -1L)
			return(1);
		(void)bcopy((char *)&f,(char *)&addr.sin_addr,sizeof(f));
	}

	addr.sin_port = htons(DGRAMPORT);
	addr.sin_family = AF_INET;

	if((dgramfd = socket(AF_INET,SOCK_DGRAM,0)) < 0)
		return(1);

	sprintf(pbuf,"U\t%.20s\t%.20s\t%.20s\t%.10d\t0\t%.25s",
		localnam,password,localnam,current_time,comment);
	sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
	return(0);
}





/* disable RWHO */
int rwhocli_shutdown()
{
	char	pbuf[512];

	if(dgramfd != -1) {
		sprintf(pbuf,"D\t%.20s\t%.20s\t%.20s",localnam,password,localnam);
		sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
		close(dgramfd);
		dgramfd = -1;
		free(password);
		free(localnam);
	}
	return(0);
}





/* send an update ping that we're alive */
int rwhocli_pingalive()
{
	char	pbuf[512];

	if(dgramfd != -1) {
		sprintf(pbuf,"M\t%.20s\t%.20s\t%.20s\t%.10d\t0\t%.25s",
			localnam,password,localnam,current_time,lcomment);
		sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
	}
	return(0);
}





/* send a "so-and-so-logged in" message */
int rwhocli_userlogin(uid,name,tim)
char	*uid;
char	*name;
int	tim;
{
	char	pbuf[512];

	if(dgramfd != -1) {
		sprintf(pbuf,"A\t%.20s\t%.20s\t%.20s\t%.20s\t%.10d\t0\t%.20s",
			localnam,password,localnam,uid,tim,name);
		sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
	}
	return(0);
}





/* send a "so-and-so-logged out" message */
int rwhocli_userlogout(uid)
char	*uid;
{
	char	pbuf[512];

	if(dgramfd != -1) {
		sprintf(pbuf,"Z\t%.20s\t%.20s\t%.20s\t%.20s",
			localnam,password,localnam,uid);
		sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
	}
	return(0);
}

#endif /* MUDWHO whole file ! */
