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https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
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145 lines
3.3 KiB
C
145 lines
3.3 KiB
C
/* $NetBSD: lcl.c,v 1.1.1.2 2012/09/09 16:07:56 christos Exp $ */
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/*
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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 1996-1999 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#if !defined(LINT) && !defined(CODECENTER)
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static const char rcsid[] = "Id: lcl.c,v 1.4 2005/04/27 04:56:30 sra Exp ";
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#endif
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/* Imports */
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#include "port_before.h"
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <resolv.h>
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#include <isc/memcluster.h>
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#include <irs.h>
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#include "port_after.h"
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#include "irs_p.h"
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#include "lcl_p.h"
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/* Forward. */
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static void lcl_close(struct irs_acc *);
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static struct __res_state * lcl_res_get(struct irs_acc *);
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static void lcl_res_set(struct irs_acc *, struct __res_state *,
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void (*)(void *));
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/* Public */
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struct irs_acc *
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irs_lcl_acc(const char *options) {
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struct irs_acc *acc;
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struct lcl_p *lcl;
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UNUSED(options);
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if (!(acc = memget(sizeof *acc))) {
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errno = ENOMEM;
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return (NULL);
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}
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memset(acc, 0x5e, sizeof *acc);
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if (!(lcl = memget(sizeof *lcl))) {
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errno = ENOMEM;
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free(acc);
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return (NULL);
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}
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memset(lcl, 0x5e, sizeof *lcl);
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lcl->res = NULL;
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lcl->free_res = NULL;
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acc->private = lcl;
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#ifdef WANT_IRS_GR
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acc->gr_map = irs_lcl_gr;
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#else
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acc->gr_map = NULL;
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#endif
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#ifdef WANT_IRS_PW
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acc->pw_map = irs_lcl_pw;
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#else
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acc->pw_map = NULL;
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#endif
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acc->sv_map = irs_lcl_sv;
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acc->pr_map = irs_lcl_pr;
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acc->ho_map = irs_lcl_ho;
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acc->nw_map = irs_lcl_nw;
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acc->ng_map = irs_lcl_ng;
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acc->res_get = lcl_res_get;
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acc->res_set = lcl_res_set;
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acc->close = lcl_close;
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return (acc);
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}
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/* Methods */
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static struct __res_state *
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lcl_res_get(struct irs_acc *this) {
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struct lcl_p *lcl = (struct lcl_p *)this->private;
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if (lcl->res == NULL) {
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struct __res_state *res;
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res = (struct __res_state *)malloc(sizeof *res);
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if (res == NULL)
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return (NULL);
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memset(res, 0, sizeof *res);
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lcl_res_set(this, res, free);
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}
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if ((lcl->res->options & RES_INIT) == 0U &&
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res_ninit(lcl->res) < 0)
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return (NULL);
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return (lcl->res);
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}
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static void
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lcl_res_set(struct irs_acc *this, struct __res_state *res,
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void (*free_res)(void *)) {
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struct lcl_p *lcl = (struct lcl_p *)this->private;
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if (lcl->res && lcl->free_res) {
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res_nclose(lcl->res);
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(*lcl->free_res)(lcl->res);
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}
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lcl->res = res;
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lcl->free_res = free_res;
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}
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static void
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lcl_close(struct irs_acc *this) {
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struct lcl_p *lcl = (struct lcl_p *)this->private;
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if (lcl) {
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if (lcl->free_res)
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(*lcl->free_res)(lcl->res);
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memput(lcl, sizeof *lcl);
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}
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memput(this, sizeof *this);
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}
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/*! \file */
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