lwaddr.c

来自「非常好的dns解析软件」· C语言 代码 · 共 95 行

/*
 * Copyright (C) 2004, 2005  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 2000, 2001  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.
 */

/* $Id: lwaddr.c,v 1.4.18.2 2005/04/29 00:15:23 marka Exp $ */

/*! \file */

#include <config.h>

#include <string.h>

#include <isc/result.h>
#include <isc/netaddr.h>
#include <isc/sockaddr.h>

#include <lwres/lwres.h>

#include <named/lwaddr.h>

/*%
 * Convert addresses from lwres to isc format.
 */
isc_result_t
lwaddr_netaddr_fromlwresaddr(isc_netaddr_t *na, lwres_addr_t *la) {
	if (la->family != LWRES_ADDRTYPE_V4 && la->family != LWRES_ADDRTYPE_V6)
		return (ISC_R_FAMILYNOSUPPORT);

	if (la->family == LWRES_ADDRTYPE_V4) {
		struct in_addr ina;
		memcpy(&ina.s_addr, la->address, 4);
		isc_netaddr_fromin(na, &ina);
	} else {
		struct in6_addr ina6;
		memcpy(&ina6.s6_addr, la->address, 16);
		isc_netaddr_fromin6(na, &ina6);
	}
	return (ISC_R_SUCCESS);
}

isc_result_t
lwaddr_sockaddr_fromlwresaddr(isc_sockaddr_t *sa, lwres_addr_t *la,
			      in_port_t port)
{
	isc_netaddr_t na;
	isc_result_t result;

	result = lwaddr_netaddr_fromlwresaddr(&na, la);
	if (result != ISC_R_SUCCESS)
		return (result);
	isc_sockaddr_fromnetaddr(sa, &na, port);
	return (ISC_R_SUCCESS);
}

/*%
 * Convert addresses from isc to lwres format.
 */

isc_result_t
lwaddr_lwresaddr_fromnetaddr(lwres_addr_t *la, isc_netaddr_t *na) {
	if (na->family != AF_INET && na->family != AF_INET6)
		return (ISC_R_FAMILYNOSUPPORT);

	if (na->family == AF_INET) {
		la->family = LWRES_ADDRTYPE_V4;
		la->length = 4;
		memcpy(la->address, &na->type.in, 4);
	} else {
		la->family = LWRES_ADDRTYPE_V6;
		la->length = 16;
		memcpy(la->address, &na->type.in, 16);
	}
	return (ISC_R_SUCCESS);
}

isc_result_t
lwaddr_lwresaddr_fromsockaddr(lwres_addr_t *la, isc_sockaddr_t *sa) {
	isc_netaddr_t na;
	isc_netaddr_fromsockaddr(&na, sa);
	return (lwaddr_lwresaddr_fromnetaddr(la, &na));
}