mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
332 lines
8.8 KiB
C
332 lines
8.8 KiB
C
/*-
|
|
* 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 <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 "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';
|
|
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;
|
|
}
|
|
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);
|
|
}
|
|
if (gethostent_p(&he, hed, statp->options & RES_USE_INET6, statp) != 0)
|
|
return (-1);
|
|
if (__copy_hostent(&he, hptr, buffer, buflen) != 0)
|
|
return (-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;
|
|
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;
|
|
}
|
|
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) {
|
|
*h_errnop = statp->res_h_errno;
|
|
return (NS_NOTFOUND);
|
|
}
|
|
*((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)
|
|
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;
|
|
}
|
|
_endhosthtent(hed);
|
|
|
|
if (error != 0)
|
|
return (NS_NOTFOUND);
|
|
if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
|
|
*h_errnop = statp->res_h_errno;
|
|
return (NS_NOTFOUND);
|
|
}
|
|
*((struct hostent **)rval) = hptr;
|
|
return (NS_SUCCESS);
|
|
}
|