/*-
* 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.
* 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>
__FBSDID("$FreeBSD$");
#include <rtems/bsd/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 <errno.h>
#include <string.h>
#include <stdarg.h>
#include <nsswitch.h>
#include <arpa/nameser.h> /* XXX */
#include <resolv.h> /* XXX */
#include "netdb_private.h"
void
_sethosthtent(int f, struct hostent_data *hed)
{
if (!hed->hostf)
hed->hostf = fopen(_PATH_HOSTS, "r");
else
rewind(hed->hostf);
hed->stayopen = f;
}
void
_endhosthtent(struct hostent_data *hed)
{
if (hed->hostf && !hed->stayopen) {
(void) fclose(hed->hostf);
hed->hostf = NULL;
}
}
static int
gethostent_p(struct hostent *he, struct hostent_data *hed, int mapped,
res_state statp)
{
char *p, *bp, *ep;
char *cp, **q;
int af, len;
char hostbuf[BUFSIZ + 1];
if (!hed->hostf && !(hed->hostf = fopen(_PATH_HOSTS, "r"))) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
return (-1);
}
again:
if (!(p = fgets(hostbuf, sizeof hostbuf, hed->hostf))) {
RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
return (-1);
}
if (*p == '#')
goto again;
cp = strpbrk(p, "#\n");
if (cp != NULL)
*cp = '\0';
if (!(cp = strpbrk(p, " \t")))
goto again;
*cp++ = '\0';
#ifdef INET6
if (inet_pton(AF_INET6, p, hed->host_addr) > 0) {
af = AF_INET6;
len = IN6ADDRSZ;
} else if (inet_pton(AF_INET, p, hed->host_addr) > 0) {
if (mapped) {
_map_v4v6_address((char *)hed->host_addr,
(char *)hed->host_addr);
af = AF_INET6;
len = IN6ADDRSZ;
} else {
af = AF_INET;
len = INADDRSZ;
}
} else {
goto again;
}
#else
if (inet_pton(AF_INET, p, hed->host_addr) > 0) {
af = AF_INET;
len = INADDRSZ;
}
#endif
hed->h_addr_ptrs[0] = (char *)hed->host_addr;
hed->h_addr_ptrs[1] = NULL;
he->h_addr_list = hed->h_addr_ptrs;
he->h_length = len;
he->h_addrtype = af;
while (*cp == ' ' || *cp == '\t')
cp++;
bp = hed->hostbuf;
ep = hed->hostbuf + sizeof hed->hostbuf;
he->h_name = bp;
q = he->h_aliases = hed->host_aliases;
if ((p = strpbrk(cp, " \t")) != NULL)
*p++ = '\0';
len = strlen(cp) + 1;
if (ep - bp < len) {
RES_SET_H_ERRNO(statp, NO_RECOVERY);
return (-1);
}
strlcpy(bp, cp, ep - bp);
bp += len;
cp = p;
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q >= &hed->host_aliases[_MAXALIASES - 1])
break;
if ((p = strpbrk(cp, " \t")) != NULL)
*p++ = '\0';
len = strlen(cp) + 1;
if (ep - bp < len)
break;
strlcpy(bp, cp, ep - bp);
*q++ = bp;
bp += len;
cp = p;
}
*q = NULL;
RES_SET_H_ERRNO(statp, NETDB_SUCCESS);
return (0);
}
int
gethostent_r(struct hostent *hptr, char *buffer, size_t buflen,
struct hostent **result, int *h_errnop)
{
struct hostent_data *hed;
struct hostent he;
res_state statp;
statp = __res_state();
if ((statp->options & RES_INIT) == 0 && res_ninit(statp) == -1) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (-1);
}
if ((hed = __hostent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (-1);
}
#ifdef INET6
if (gethostent_p(&he, hed, statp->options & RES_USE_INET6, statp) != 0)
return (-1);
#endif
if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return ((errno != 0) ? errno : -1);
}
*result = hptr;
return (0);
}
struct hostent *
gethostent(void)
{
struct hostdata *hd;
struct hostent *rval;
int ret_h_errno;
if ((hd = __hostdata_init()) == NULL)
return (NULL);
if (gethostent_r(&hd->host, hd->data, sizeof(hd->data), &rval,
&ret_h_errno) != 0)
return (NULL);
return (rval);
}
int
_ht_gethostbyname(void *rval, void *cb_data, va_list ap)
{
const char *name;
int af;
char *buffer;
size_t buflen;
int *errnop, *h_errnop;
struct hostent *hptr, he;
struct hostent_data *hed;
char **cp;
res_state statp;
int error;
name = va_arg(ap, const char *);
af = va_arg(ap, int);
hptr = va_arg(ap, struct hostent *);
buffer = va_arg(ap, char *);
buflen = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
h_errnop = va_arg(ap, int *);
*((struct hostent **)rval) = NULL;
statp = __res_state();
if ((hed = __hostent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
_sethosthtent(0, hed);
while ((error = gethostent_p(&he, hed, 0, statp)) == 0) {
if (he.h_addrtype != af)
continue;
#ifdef INET6
if (he.h_addrtype == AF_INET &&
statp->options & RES_USE_INET6) {
_map_v4v6_address(he.h_addr, he.h_addr);
he.h_length = IN6ADDRSZ;
he.h_addrtype = AF_INET6;
}
#endif
if (strcasecmp(he.h_name, name) == 0)
break;
for (cp = he.h_aliases; *cp != 0; cp++)
if (strcasecmp(*cp, name) == 0)
goto found;
}
found:
_endhosthtent(hed);
if (error != 0) {
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
*errnop = errno;
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_RETURN);
}
*((struct hostent **)rval) = hptr;
return (NS_SUCCESS);
}
int
_ht_gethostbyaddr(void *rval, void *cb_data, va_list ap)
{
const void *addr;
socklen_t len;
int af;
char *buffer;
size_t buflen;
int *errnop, *h_errnop;
struct hostent *hptr, he;
struct hostent_data *hed;
res_state statp;
int error;
addr = va_arg(ap, const void *);
len = va_arg(ap, socklen_t);
af = va_arg(ap, int);
hptr = va_arg(ap, struct hostent *);
buffer = va_arg(ap, char *);
buflen = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
h_errnop = va_arg(ap, int *);
*((struct hostent **)rval) = NULL;
statp = __res_state();
if ((hed = __hostent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
_sethosthtent(0, hed);
while ((error = gethostent_p(&he, hed, 0, statp)) == 0)
#ifdef INET6
if (he.h_addrtype == af && !bcmp(he.h_addr, addr, len)) {
if (he.h_addrtype == AF_INET &&
statp->options & RES_USE_INET6) {
_map_v4v6_address(he.h_addr, he.h_addr);
he.h_length = IN6ADDRSZ;
he.h_addrtype = AF_INET6;
}
break;
}
#endif
_endhosthtent(hed);
if (error != 0)
return (NS_NOTFOUND);
if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
*errnop = errno;
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_RETURN);
}
*((struct hostent **)rval) = hptr;
return (NS_SUCCESS);
}
