/*-
* Copyright (c) 1985, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* -
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* 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, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION 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.
* -
* --Copyright--
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdarg.h>
#include <nsswitch.h>
#include <arpa/nameser.h> /* XXX */
#include <resolv.h> /* XXX */
#include <dirent.h>
#include <stdlib.h>
#include <errno.h>
static FILE *hostf = NULL;
static int stayopen = 0;
__LOCK_INIT(static, host_lock);
void
_sethosthtent_r(int f, FILE **hostfile, int *hstayopen)
{
if (!*hostfile)
*hostfile = fopen(_PATH_HOSTS, "r" );
else
rewind(*hostfile);
*hstayopen = f;
}
void
_endhosthtent_r(FILE **hostfile, int *hstayopen)
{
if (*hostfile && !*hstayopen) {
(void) fclose(*hostfile);
*hostfile = NULL;
}
}
void
_sethosthtent(f)
int f;
{
_sethosthtent_r(f, &hostf, &stayopen);
}
void
_endhosthtent()
{
_endhosthtent_r(&hostf, &stayopen);
}
struct hostent *
gethostent()
{
static struct hostent hp;
static char buffer[BUFSIZ+1];
static int len = BUFSIZ;
static int herr;
#ifdef HAVE_DD_LOCK
__lock_acquire(host_lock);
#endif
gethostent_r(&hp, buffer, len, &herr, &hostf);
#ifdef HAVE_DD_LOCK
__lock_release(host_lock);
#endif
return &hp;
}
int
gethostent_r(struct hostent *hp, char *buffer, int buflen, int *herr, FILE **hostfile)
{
char *p;
char *cp, **q;
int af, len;
if (!*hostfile && !(*hostfile = fopen(_PATH_HOSTS, "r" ))) {
*herr = NETDB_INTERNAL;
return -1;
}
again:
if (!(p = fgets(buffer, buflen, *hostfile))) {
*herr = HOST_NOT_FOUND;
return -1;
}
if (*p == '#')
goto again;
if (!(cp = strpbrk(p, "#\n")))
goto again;
*cp = '\0';
if (!(cp = strpbrk(p, " \t")))
goto again;
*cp++ = '\0';
hp->h_addr_list = hp->__host_addrs;
hp->__host_addrs[0] = (char *)hp->__host_addr;
if (inet_pton(AF_INET6, p, hp->h_addr_list[0]) > 0) {
af = AF_INET6;
len = IN6ADDRSZ;
} else if (inet_pton(AF_INET, p, hp->h_addr_list[0]) > 0) {
if (_res.options & RES_USE_INET6) {
_map_v4v6_address(hp->h_addr_list[0], hp->h_addr_list[0]);
af = AF_INET6;
len = IN6ADDRSZ;
} else {
af = AF_INET;
len = INADDRSZ;
}
} else {
goto again;
}
hp->h_addr_list[1] = NULL;
hp->h_addr = hp->__host_addrs[0];
hp->h_length = len;
hp->h_addrtype = af;
while (*cp == ' ' || *cp == '\t')
cp++;
hp->h_name = cp;
q = hp->h_aliases = hp->__host_aliases;
if ((cp = strpbrk(cp, " \t")) != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &hp->h_aliases[MAXALIASES - 1])
*q++ = cp;
if ((cp = strpbrk(cp, " \t")) != NULL)
*cp++ = '\0';
}
*q = NULL;
*herr = NETDB_SUCCESS;
return 0;
}
int
_ht_gethostbyname(void *rval, void *cb_data, va_list ap)
{
char **cp;
const char *name;
int af;
struct hostent *resultbuf;
char *buf;
int buflen;
int *herr;
FILE *hostfile = NULL;
int stayopen;
int p;
name = va_arg(ap, const char *);
af = va_arg(ap, int);
resultbuf = va_arg(ap, struct hostent *);
buf = va_arg(ap, char *);
buflen = va_arg(ap, int);
herr = va_arg(ap, int *);
sethostent_r(0, &hostfile, &stayopen);
while ((p = gethostent_r(resultbuf, buf, buflen, herr, &hostfile)) != -1) {
if (resultbuf->h_addrtype != af)
continue;
if (strcasecmp(resultbuf->h_name, name) == 0)
break;
for (cp = resultbuf->h_aliases; *cp != 0; cp++)
if (strcasecmp(*cp, name) == 0)
goto found;
}
found:
endhostent_r(&hostfile, &stayopen);
if (p == -1)
{
*(struct hostent **)rval = NULL;
return NS_NOTFOUND;
}
else
{
*(struct hostent **)rval = resultbuf;
return NS_SUCCESS;
}
}
int
_ht_gethostbyaddr(void *rval, void *cb_data, va_list ap)
{
const char *addr;
int len, af;
struct hostent *resultbuf;
char *buf;
int buflen;
int *herr;
FILE *hostfile = NULL;
int stayopen;
int p;
addr = va_arg(ap, const char *);
len = va_arg(ap, int);
af = va_arg(ap, int);
resultbuf = va_arg(ap, struct hostent *);
buf = va_arg(ap, char *);
buflen = va_arg(ap, int);
herr = va_arg(ap, int *);
sethostent_r(0, &hostfile, &stayopen);
while ((p = gethostent_r(resultbuf, buf, buflen, herr, &hostfile)) != -1)
if (resultbuf->h_addrtype == af && !memcmp(resultbuf->h_addr, addr, len))
break;
endhostent_r(&hostfile, &stayopen);
if (p == -1)
{
*(struct hostent **)rval = NULL;
return NS_NOTFOUND;
}
else
{
*(struct hostent **)rval = resultbuf;
return NS_SUCCESS;
}
}