/*      $NetBSD: lcl.c,v 1.1.1.2 2012/09/09 16:07:56 christos Exp $     */

/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#if !defined(LINT) && !defined(CODECENTER)
static const char rcsid[] = "Id: lcl.c,v 1.4 2005/04/27 04:56:30 sra Exp ";
#endif

/* Imports */

#include "port_before.h"

#include <stdlib.h>
#include <errno.h>
#include <string.h>

#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>

#include <isc/memcluster.h>

#include <irs.h>

#include "port_after.h"

#include "irs_p.h"
#include "lcl_p.h"

/* Forward. */

static void             lcl_close(struct irs_acc *);
static struct __res_state *     lcl_res_get(struct irs_acc *);
static void             lcl_res_set(struct irs_acc *, struct __res_state *,
                               void (*)(void *));

/* Public */

struct irs_acc *
irs_lcl_acc(const char *options) {
       struct irs_acc *acc;
       struct lcl_p *lcl;

       UNUSED(options);

       if (!(acc = memget(sizeof *acc))) {
               errno = ENOMEM;
               return (NULL);
       }
       memset(acc, 0x5e, sizeof *acc);
       if (!(lcl = memget(sizeof *lcl))) {
               errno = ENOMEM;
               free(acc);
               return (NULL);
       }
       memset(lcl, 0x5e, sizeof *lcl);
       lcl->res = NULL;
       lcl->free_res = NULL;
       acc->private = lcl;
#ifdef WANT_IRS_GR
       acc->gr_map = irs_lcl_gr;
#else
       acc->gr_map = NULL;
#endif
#ifdef WANT_IRS_PW
       acc->pw_map = irs_lcl_pw;
#else
       acc->pw_map = NULL;
#endif
       acc->sv_map = irs_lcl_sv;
       acc->pr_map = irs_lcl_pr;
       acc->ho_map = irs_lcl_ho;
       acc->nw_map = irs_lcl_nw;
       acc->ng_map = irs_lcl_ng;
       acc->res_get = lcl_res_get;
       acc->res_set = lcl_res_set;
       acc->close = lcl_close;
       return (acc);
}

/* Methods */
static struct __res_state *
lcl_res_get(struct irs_acc *this) {
       struct lcl_p *lcl = (struct lcl_p *)this->private;

       if (lcl->res == NULL) {
               struct __res_state *res;
               res = (struct __res_state *)malloc(sizeof *res);
               if (res == NULL)
                       return (NULL);
               memset(res, 0, sizeof *res);
               lcl_res_set(this, res, free);
       }

       if ((lcl->res->options & RES_INIT) == 0U &&
           res_ninit(lcl->res) < 0)
               return (NULL);

       return (lcl->res);
}

static void
lcl_res_set(struct irs_acc *this, struct __res_state *res,
               void (*free_res)(void *)) {
       struct lcl_p *lcl = (struct lcl_p *)this->private;

       if (lcl->res && lcl->free_res) {
               res_nclose(lcl->res);
               (*lcl->free_res)(lcl->res);
       }

       lcl->res = res;
       lcl->free_res = free_res;
}

static void
lcl_close(struct irs_acc *this) {
       struct lcl_p *lcl = (struct lcl_p *)this->private;

       if (lcl) {
               if (lcl->free_res)
                       (*lcl->free_res)(lcl->res);
               memput(lcl, sizeof *lcl);
       }
       memput(this, sizeof *this);
}

/*! \file */