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

#ifndef	lint
static char     RCSid[] = "$Header: /home/mjr/hacks/umud/RWHO/RCS/clilib.c,v 1.4 91/10/28 21:35:07 mjr Exp $";
#endif

#include "config.h"

#ifdef SUPPORT_RWHO
/*
 * 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	<sys/in.h> */
#include	<netinet/in.h>
#include	<netdb.h>
#endif	/* VMS */

#define	DGRAMPORT		6888

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

static int      dgramfd = -1;
static char    *password;
static char    *localnam;
static char    *lcomment;
static struct sockaddr_in addr;
time_t          senttime;

extern char    *ty_malloc();
extern void     ty_free();

/* enable RWHO and send the server a "we are up" message */
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 = ty_malloc(strlen(serverpw) + 1);
  localnam = ty_malloc(strlen(myname) + 1);
  lcomment = ty_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);

  time(&senttime);

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





/* disable RWHO */
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;
    ty_free(password);
    ty_free(localnam);
  }
  return (0);
}





/* send an update ping that we're alive */
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, senttime, lcomment);
    sendto(dgramfd, pbuf, strlen(pbuf), 0, &addr, sizeof(addr));
  }
  return (0);
}





/* send a "so-and-so-logged in" message */
rwhocli_userlogin(uid, name, tim)
  char           *uid;
  char           *name;
  time_t          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 */
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