/* * 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 1.1.206.2 2004/03/17 00:29:49 marka 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 voidlcl_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 voidlcl_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);}