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/* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Mark Kettenis <kettenis@gnu.org>, 2000.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <netdb.h>
#include <nss.h>
#include <lwres/netdb.h>
static int copytobuf(struct hostent *, struct hostent *, char *, int);
static enum nss_status
internal_getipnodebyname_r (const char *name, int af, int flags,
struct hostent *result, char *buffer,
size_t buflen, int *errnop, int *herrnop)
{
struct hostent *he;
int mapped_flags = 0;
int res;
he = lwres_getipnodebyname (name, af, mapped_flags, herrnop);
if (he == NULL)
{
switch (*herrnop)
{
case HOST_NOT_FOUND:
case NO_ADDRESS:
return NSS_STATUS_NOTFOUND;
default:
return NSS_STATUS_UNAVAIL;
}
}
res = copytobuf (he, result, buffer, buflen);
if (he != NULL)
lwres_freehostent (he);
if (res != 0)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_lwres_gethostbyname2_r (const char *name, int af, struct hostent *result,
char *buffer, size_t buflen, int *errnop,
int *herrnop)
{
return internal_getipnodebyname_r (name, af, 0, result, buffer, buflen,
errnop, herrnop);
}
enum nss_status
_nss_lwres_gethostbyname_r (const char *name, struct hostent *result,
char *buffer, size_t buflen, int *errnop,
int *herrnop)
{
/* FIXME: I suppose we need some other options here. */
return internal_getipnodebyname_r (name, AF_INET, 0, result,
buffer, buflen, errnop, herrnop);
}
enum nss_status
_nss_lwres_gethostbyaddr_r (const char *addr, size_t len, int type,
struct hostent *result, char *buffer,
size_t buflen, int *errnop, int *herrnop)
{
struct hostent *he;
int res;
he = lwres_getipnodebyaddr (addr, len, type, herrnop);
if (he == NULL)
{
switch (*herrnop)
{
case HOST_NOT_FOUND:
case NO_ADDRESS:
return NSS_STATUS_NOTFOUND;
default:
return NSS_STATUS_UNAVAIL;
}
}
res = copytobuf (he, result, buffer, buflen);
if (he != NULL)
lwres_freehostent (he);
if (res != 0)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
return NSS_STATUS_SUCCESS;
}
/* The function on this page is copied from the file
`lib/lwres/gethost.c' in the BIND9 distribution and has the
following copyright: */
/*
* Copyright (C) 2000 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM 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.
*/
/* $BIND9Id: gethost.c,v 1.20 2000/06/27 23:13:26 bwelling Exp $ */
#define LWRES_ALIGNBYTES (sizeof(char *) - 1)
#define LWRES_ALIGN(p) \
(((unsigned long)(p) + LWRES_ALIGNBYTES) &~ LWRES_ALIGNBYTES)
static int
copytobuf(struct hostent *he, struct hostent *hptr, char *buf, int buflen) {
char *cp;
char **ptr;
int i, n;
int nptr, len;
/*
* Find out the amount of space required to store the answer.
*/
nptr = 2; /* NULL ptrs */
len = (char *)LWRES_ALIGN(buf) - buf;
for (i = 0; he->h_addr_list[i]; i++, nptr++) {
len += he->h_length;
}
for (i = 0; he->h_aliases[i]; i++, nptr++) {
len += strlen(he->h_aliases[i]) + 1;
}
len += strlen(he->h_name) + 1;
len += nptr * sizeof(char*);
if (len > buflen) {
return (-1);
}
/*
* Copy address size and type.
*/
hptr->h_addrtype = he->h_addrtype;
n = hptr->h_length = he->h_length;
ptr = (char **)LWRES_ALIGN(buf);
cp = (char *)LWRES_ALIGN(buf) + nptr * sizeof(char *);
/*
* Copy address list.
*/
hptr->h_addr_list = ptr;
for (i = 0; he->h_addr_list[i]; i++, ptr++) {
memcpy(cp, he->h_addr_list[i], n);
hptr->h_addr_list[i] = cp;
cp += n;
}
hptr->h_addr_list[i] = NULL;
ptr++;
/*
* Copy official name.
*/
n = strlen(he->h_name) + 1;
strcpy(cp, he->h_name);
hptr->h_name = cp;
cp += n;
/*
* Copy aliases.
*/
hptr->h_aliases = ptr;
for (i = 0; he->h_aliases[i]; i++) {
n = strlen(he->h_aliases[i]) + 1;
strcpy(cp, he->h_aliases[i]);
hptr->h_aliases[i] = cp;
cp += n;
}
hptr->h_aliases[i] = NULL;
return (0);
}
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