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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* gethostbyname_r() is defined in this file. It is implemented on top of
* _get_hostserv_inetnetdir_byname() which is also used to implement
* netdir_getbyname() for inet family transports. In turn the common code
* uses the name service switch policy for "hosts" and "services" unless
* the administrator chooses to bypass the name service switch by
* specifying third-party supplied nametoaddr libs for inet transports
* in /etc/netconfig.
*
* gethostbyaddr_r() is similarly related to _get_hostserv_inetnetdir_byaddr()
* and netdir_getbyaddr();
*
* The common code lives in netdir_inet.c.
*
* gethostent_r(), sethostent() and endhostent() are *not* implemented on top
* of the common interface; they go straight to the switch and are
* defined in gethostent_r.c.
*
* There is absolutely no data sharing, not even the stayopen flag or
* enumeration state, between gethostbyYY_r() and gethostent_r();
*/
#include "mt.h"
#include <netdb.h>
#include <netdir.h>
#include <sys/types.h>
#include <nss_netdir.h>
#include <string.h>
extern struct netconfig *__rpc_getconfip();
/*
* h_errno POLICY: The frontends expect the name service
* backends to modify the h_errno in "arg"; _switch_gethostbyYY_r()
* will copy that over onto user's h_errnop pointer. This h_errno is
* never used for "switching" -- status from nss_search serves
* the purpose. There is no explicit zeroing in the case of success.
*/
extern struct hostent *
_switch_gethostbyname_r(const char *nam, struct hostent *result, char *buffer,
int buflen, int *h_errnop);
extern struct hostent *
_switch_gethostbyaddr_r(const char *addr, int length, int type,
struct hostent *result, char *buffer, int buflen, int *h_errnop);
#ifdef PIC
struct hostent *
_uncached_gethostbyname_r(const char *nam, struct hostent *result,
char *buffer, int buflen, int *h_errnop)
{
return (_switch_gethostbyname_r(nam, result,
buffer, buflen, h_errnop));
}
struct hostent *
_uncached_gethostbyaddr_r(const char *addr, int length, int type,
struct hostent *result, char *buffer, int buflen, int *h_errnop)
{
return (_switch_gethostbyaddr_r(addr, length, type,
result, buffer, buflen, h_errnop));
}
#endif
extern struct hostent *
gethostbyname_r(const char *nam, struct hostent *result, char *buffer,
int buflen, int *h_errnop);
extern struct hostent *
gethostbyaddr_r(const char *addr, int length, int type,
struct hostent *result, char *buffer, int buflen, int *h_errnop);
struct hostent *
gethostbyname_r(const char *nam, struct hostent *result, char *buffer,
int buflen, int *h_errnop)
{
struct netconfig *nconf;
struct nss_netdirbyname_in nssin;
union nss_netdirbyname_out nssout;
int neterr, dummy;
if (h_errnop == NULL)
h_errnop = &dummy;
if (strlen(nam) == 0) {
*h_errnop = HOST_NOT_FOUND;
return (NULL);
}
if ((nconf = __rpc_getconfip("udp")) == NULL &&
(nconf = __rpc_getconfip("tcp")) == NULL) {
*h_errnop = NO_RECOVERY;
return (NULL);
}
nssin.op_t = NSS_HOST;
nssin.arg.nss.host.name = nam;
nssin.arg.nss.host.buf = buffer;
nssin.arg.nss.host.buflen = buflen;
nssout.nss.host.hent = result;
nssout.nss.host.herrno_p = h_errnop;
/*
* We pass in nconf and let the implementation of the long-named func
* decide whether to use the switch based on nc_nlookups.
*/
neterr = _get_hostserv_inetnetdir_byname(nconf, &nssin, &nssout);
(void) freenetconfigent(nconf);
if (neterr != ND_OK)
return (NULL);
return (nssout.nss.host.hent);
}
struct hostent *
gethostbyaddr_r(const char *addr, int length, int type,
struct hostent *result, char *buffer, int buflen, int *h_errnop)
{
struct netconfig *nconf;
struct nss_netdirbyaddr_in nssin;
union nss_netdirbyaddr_out nssout;
int neterr, dummy;
if (h_errnop == NULL)
h_errnop = &dummy;
if (type != AF_INET) {
*h_errnop = HOST_NOT_FOUND;
return (NULL);
}
if ((nconf = __rpc_getconfip("udp")) == NULL &&
(nconf = __rpc_getconfip("tcp")) == NULL) {
*h_errnop = NO_RECOVERY;
return (NULL);
}
nssin.op_t = NSS_HOST;
nssin.arg.nss.host.addr = addr;
nssin.arg.nss.host.len = length;
nssin.arg.nss.host.type = type;
nssin.arg.nss.host.buf = buffer;
nssin.arg.nss.host.buflen = buflen;
nssout.nss.host.hent = result;
nssout.nss.host.herrno_p = h_errnop;
/*
* We pass in nconf and let the implementation of this long-named func
* decide whether to use the switch based on nc_nlookups.
*/
neterr = _get_hostserv_inetnetdir_byaddr(nconf, &nssin, &nssout);
(void) freenetconfigent(nconf);
if (neterr != ND_OK)
return (NULL);
return (nssout.nss.host.hent);
}
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