/* hport.c
   Find a port in the HDB configuration files.

   Copyright (C) 1992, 1993 Ian Lance Taylor

   This file is part of the Taylor UUCP uuconf library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License
   as published by the Free Software Foundation; either version 2 of
   the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

   The author of the program may be contacted at ian@airs.com or
   c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
   */

#include "uucnfi.h"

#if USE_RCS_ID
const char _uuconf_hport_rcsid[] = "$Id: hport.c,v 1.1 1995/10/18 08:38:34 deraadt Exp $";
#endif

#include <errno.h>
#include <ctype.h>

/* Find a port in the HDB configuration files by name, baud rate, and
   special purpose function.  */

int
uuconf_hdb_find_port (pglobal, zname, ibaud, ihighbaud, pifn, pinfo, qport)
     pointer pglobal;
     const char *zname;
     long ibaud;
     long ihighbaud;
     int (*pifn) P((struct uuconf_port *, pointer));
     pointer pinfo;
     struct uuconf_port *qport;
{
  struct sglobal *qglobal = (struct sglobal *) pglobal;
  char *zline;
  size_t cline;
  char **pzsplit;
  size_t csplit;
  int iret;
  char **pz;

  zline = NULL;
  cline = 0;
  pzsplit = NULL;
  csplit = 0;

  iret = UUCONF_NOT_FOUND;

  for (pz = qglobal->qprocess->pzhdb_devices; *pz != NULL; pz++)
    {
      FILE *e;
      int cchars;

      qglobal->ilineno = 0;

      e = fopen (*pz, "r");
      if (e == NULL)
	{
	  if (FNO_SUCH_FILE ())
	    continue;
	  qglobal->ierrno = errno;
	  iret = UUCONF_FOPEN_FAILED | UUCONF_ERROR_ERRNO;
	  break;
	}

      iret = UUCONF_NOT_FOUND;

      while ((cchars = _uuconf_getline (qglobal, &zline, &cline, e)) > 0)
	{
	  int ctoks;
	  char *z, *zprotos, *zport;
	  long ilow, ihigh;
	  pointer pblock;
	  char ***ppzdialer;

	  ++qglobal->ilineno;

	  iret = UUCONF_NOT_FOUND;

	  --cchars;
	  if (zline[cchars] == '\n')
	    zline[cchars] = '\0';
	  if (isspace (BUCHAR (zline[0])) || zline[0] == '#')
	    continue;

	  ctoks = _uuconf_istrsplit (zline, '\0', &pzsplit, &csplit);
	  if (ctoks < 0)
	    {
	      qglobal->ierrno = errno;
	      iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
	      break;
	    }

	  /* An entry in Devices is

	     type device dial-device baud dialer-token pairs

	     The type (normally "ACU") is treated as the name.  */

	  /* If there aren't enough entries, ignore the line; this
	     should probably do something more useful.  */
	  if (ctoks < 4)
	    continue;

	  /* There may be a comma separated list of protocols after
	     the name.  */
	  zprotos = strchr (pzsplit[0], ',');
	  if (zprotos != NULL)
	    {
	      *zprotos = '\0';
	      ++zprotos;
	    }

	  zport = pzsplit[0];

	  /* Get any modem class, and pick up the baud rate while
	     we're at it.  The modem class will be appended to the
	     name, so we need to get it before we see if we've found
	     the port with the right name.  */
	  z = pzsplit[3];
	  if (strcasecmp (z, "Any") == 0
	      || strcmp (z, "-") == 0)
	    {
	      ilow = 0L;
	      ihigh = 0L;
	    }
	  else
	    {
	      char *zend;

	      while (*z != '\0' && ! isdigit (BUCHAR (*z)))
		++z;

	      ilow = strtol (z, &zend, 10);
	      if (*zend == '-')
		ihigh = strtol (zend + 1, (char **) NULL, 10);
	      else
		ihigh = ilow;

	      if (z != pzsplit[3])
		{
		  size_t cclass, cport;

		  cclass = z - pzsplit[3];
		  cport = strlen (pzsplit[0]);
		  zport = malloc (cport + cclass + 1);
		  if (zport == NULL)
		    {
		      qglobal->ierrno = errno;
		      iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
		      break;
		    }
		  memcpy ((pointer) zport, (pointer) pzsplit[0], cport);
		  memcpy ((pointer) (zport + cport), (pointer) pzsplit[3],
			  cclass);
		  zport[cport + cclass] = '\0';
		}
	    }

	  /* Make sure the name and baud rate match any argument.  */
	  if ((zname != NULL
	       && strcmp (zport, zname) != 0)
	      || (ibaud != 0
		  && ilow != 0
		  && (ilow > ibaud || ihigh < ibaud)))
	    {
	      if (zport != pzsplit[0])
		free ((pointer) zport);
	      continue;
	    }

	  /* Some systems permit ,M after the device name.  This means
	     to open the port with O_NDELAY and then change it.  We
	     just ignore this flag, although perhaps we should record
	     it somewhere.  */
	  pzsplit[1][strcspn (pzsplit[1], ",")] = '\0';

	  /* Now we must construct the port information, so that we
	     can pass it to pifn.  The port type is determined by its
	     name, unfortunately.  The name "Direct" is used for a
	     direct port, "TCP" for a TCP port, and anything else for
	     a modem port.  */
	  pblock = NULL;
	  _uuconf_uclear_port (qport);
	  qport->uuconf_zname = zport;
	  qport->uuconf_zprotocols = zprotos;
	  if (strcmp (pzsplit[0], "Direct") == 0)
	    {
	      qport->uuconf_ttype = UUCONF_PORTTYPE_DIRECT;
	      qport->uuconf_u.uuconf_sdirect.uuconf_zdevice = pzsplit[1];
	      qport->uuconf_u.uuconf_sdirect.uuconf_ibaud = ilow;
	      qport->uuconf_u.uuconf_sdirect.uuconf_fcarrier = FALSE;
	      qport->uuconf_u.uuconf_sdirect.uuconf_fhardflow = TRUE;
	      ppzdialer = NULL;
	    }
	  else if (strcmp (pzsplit[0], "TCP") == 0)
	    {
	      /* For a TCP port, the device name is taken as the TCP
		 port to use.  */
	      qport->uuconf_ttype = UUCONF_PORTTYPE_TCP;
	      qport->uuconf_ireliable
		= (UUCONF_RELIABLE_ENDTOEND | UUCONF_RELIABLE_RELIABLE
		   | UUCONF_RELIABLE_EIGHT | UUCONF_RELIABLE_FULLDUPLEX
		   | UUCONF_RELIABLE_SPECIFIED);
	      qport->uuconf_u.uuconf_stcp.uuconf_zport = pzsplit[1];
	      ppzdialer = &qport->uuconf_u.uuconf_stcp.uuconf_pzdialer;
	    }
	  else if (ctoks >= 5
		   && (strcmp (pzsplit[4], "TLI") == 0
		       || strcmp (pzsplit[4], "TLIS") == 0))
	    {
	      qport->uuconf_ttype = UUCONF_PORTTYPE_TLI;
	      qport->uuconf_u.uuconf_stli.uuconf_zdevice = pzsplit[1];
	      qport->uuconf_u.uuconf_stli.uuconf_fstream
		= strcmp (pzsplit[4], "TLIS") == 0;
	      qport->uuconf_u.uuconf_stli.uuconf_pzpush = NULL;
	      qport->uuconf_u.uuconf_stli.uuconf_zservaddr = NULL;
	      qport->uuconf_ireliable
		= (UUCONF_RELIABLE_ENDTOEND | UUCONF_RELIABLE_RELIABLE
		   | UUCONF_RELIABLE_EIGHT | UUCONF_RELIABLE_FULLDUPLEX
		   | UUCONF_RELIABLE_SPECIFIED);
	      ppzdialer = &qport->uuconf_u.uuconf_stli.uuconf_pzdialer;
	    }
	  else
	    {
	      qport->uuconf_ttype = UUCONF_PORTTYPE_MODEM;
	      qport->uuconf_u.uuconf_smodem.uuconf_zdevice = pzsplit[1];
	      if (strcmp (pzsplit[2], "-") != 0)
		qport->uuconf_u.uuconf_smodem.uuconf_zdial_device =
		  pzsplit[2];
	      else
		qport->uuconf_u.uuconf_smodem.uuconf_zdial_device = NULL;
	      if (ilow == ihigh)
		{
		  qport->uuconf_u.uuconf_smodem.uuconf_ibaud = ilow;
		  qport->uuconf_u.uuconf_smodem.uuconf_ilowbaud = 0L;
		  qport->uuconf_u.uuconf_smodem.uuconf_ihighbaud = 0L;
		}
	      else
		{
		  qport->uuconf_u.uuconf_smodem.uuconf_ibaud = 0L;
		  qport->uuconf_u.uuconf_smodem.uuconf_ilowbaud = ilow;
		  qport->uuconf_u.uuconf_smodem.uuconf_ihighbaud = ihigh;
		}
	      qport->uuconf_u.uuconf_smodem.uuconf_fcarrier = TRUE;
	      qport->uuconf_u.uuconf_smodem.uuconf_fhardflow = TRUE;
	      qport->uuconf_u.uuconf_smodem.uuconf_qdialer = NULL;
	      ppzdialer = &qport->uuconf_u.uuconf_smodem.uuconf_pzdialer;
	    }

	  if (ppzdialer != NULL)
	    {
	      if (ctoks < 5)
		*ppzdialer = NULL;
	      else
		{
		  size_t c;
		  char **pzd;

		  pblock = uuconf_malloc_block ();
		  if (pblock == NULL)
		    {
		      qglobal->ierrno = errno;
		      iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
		      break;
		    }
		  c = (ctoks - 4) * sizeof (char *);
		  pzd = (char **) uuconf_malloc (pblock, c + sizeof (char *));
		  if (pzd == NULL)
		    {
		      qglobal->ierrno = errno;
		      uuconf_free_block (pblock);
		      iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
		      break;
		    }
		  memcpy ((pointer) pzd, (pointer) (pzsplit + 4), c);
		  pzd[ctoks - 4] = NULL;

		  *ppzdialer = pzd;
		}
	    }

	  if (pifn != NULL)
	    {
	      iret = (*pifn) (qport, pinfo);
	      if (iret != UUCONF_SUCCESS)
		{
		  if (zport != pzsplit[0])
		    free ((pointer) zport);
		  if (pblock != NULL)
		    uuconf_free_block (pblock);
		  if (iret != UUCONF_NOT_FOUND)
		    break;
		  continue;
		}
	    }

	  /* This is the port we want.  */
	  if (pblock == NULL)
	    {
	      pblock = uuconf_malloc_block ();
	      if (pblock == NULL)
		{
		  qglobal->ierrno = errno;
		  iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
		  break;
		}
	    }

	  if (uuconf_add_block (pblock, zline) != 0
	      || (zport != pzsplit[0]
		  && uuconf_add_block (pblock, zport) != 0))
	    {
	      qglobal->ierrno = errno;
	      uuconf_free_block (pblock);
	      iret = UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
	      break;
	    }
	  zline = NULL;

	  qport->uuconf_palloc = pblock;

	  iret = UUCONF_SUCCESS;

	  break;
	}

      (void) fclose (e);

      if (iret != UUCONF_NOT_FOUND)
	break;
    }

  if (zline != NULL)
    free ((pointer) zline);
  if (pzsplit != NULL)
    free ((pointer) pzsplit);

  if (iret != UUCONF_SUCCESS && iret != UUCONF_NOT_FOUND)
    {
      qglobal->zfilename = *pz;
      iret |= UUCONF_ERROR_FILENAME | UUCONF_ERROR_LINENO;
    }

  return iret;
}