/*-
* Copyright (c) 1994, Garrett Wollman
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE 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.
*/
#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 <arpa/nameser.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <nsswitch.h>
#include <resolv.h> /* XXX */
#ifdef YP
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#endif
#include "netdb_private.h"
#ifdef YP
static int
_gethostbynis(const char *name, char *map, int af, struct hostent *he,
struct hostent_data *hed)
{
char *p, *bp, *ep;
char *cp, **q;
char *result;
int resultlen, size, addrok = 0;
char ypbuf[YPMAXRECORD + 2];
res_state statp;
statp = __res_state();
switch(af) {
case AF_INET:
size = NS_INADDRSZ;
break;
case AF_INET6:
size = NS_IN6ADDRSZ;
break;
default:
errno = EAFNOSUPPORT;
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
return (-1);
}
if (hed->yp_domain == (char *)NULL)
if (yp_get_default_domain (&hed->yp_domain)) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
return (-1);
}
if (yp_match(hed->yp_domain, map, name, strlen(name), &result,
&resultlen)) {
RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
return (-1);
}
/* avoid potential memory leak */
bcopy((char *)result, (char *)&ypbuf, resultlen);
ypbuf[resultlen] = '\0';
free(result);
result = (char *)&ypbuf;
if ((cp = index(result, '\n')))
*cp = '\0';
cp = strpbrk(result, " \t");
*cp++ = '\0';
he->h_addr_list = hed->h_addr_ptrs;
he->h_addr = (char *)hed->host_addr;
switch (af) {
case AF_INET:
addrok = inet_aton(result, (struct in_addr *)hed->host_addr);
if (addrok != 1)
break;
if (statp->options & RES_USE_INET6) {
_map_v4v6_address((char *)hed->host_addr,
(char *)hed->host_addr);
af = AF_INET6;
size = NS_IN6ADDRSZ;
}
break;
case AF_INET6:
addrok = inet_pton(af, result, hed->host_addr);
break;
}
if (addrok != 1) {
RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
return (-1);
}
he->h_addr_list[1] = NULL;
he->h_length = size;
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;
p = strpbrk(cp, " \t");
if (p != NULL)
*p++ = '\0';
size = strlen(cp) + 1;
if (ep - bp < size) {
RES_SET_H_ERRNO(statp, NO_RECOVERY);
return (-1);
}
strlcpy(bp, cp, ep - bp);
bp += size;
cp = p;
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q >= &hed->host_aliases[_MAXALIASES - 1])
break;
p = strpbrk(cp, " \t");
if (p != NULL)
*p++ = '\0';
size = strlen(cp) + 1;
if (ep - bp < size)
break;
strlcpy(bp, cp, ep - bp);
*q++ = bp;
bp += size;
cp = p;
}
*q = NULL;
return (0);
}
static int
_gethostbynisname_r(const char *name, int af, struct hostent *he,
struct hostent_data *hed)
{
char *map;
switch (af) {
case AF_INET:
map = "hosts.byname";
break;
default:
map = "ipnodes.byname";
break;
}
return (_gethostbynis(name, map, af, he, hed));
}
static int
_gethostbynisaddr_r(const void *addr, socklen_t len, int af,
struct hostent *he, struct hostent_data *hed)
{
char *map;
char numaddr[46];
switch (af) {
case AF_INET:
map = "hosts.byaddr";
break;
default:
map = "ipnodes.byaddr";
break;
}
if (inet_ntop(af, addr, numaddr, sizeof(numaddr)) == NULL)
return (-1);
return (_gethostbynis(numaddr, map, af, he, hed));
}
#endif /* YP */
/* XXX _gethostbynisname/_gethostbynisaddr only used by getipnodeby*() */
struct hostent *
_gethostbynisname(const char *name, int af)
{
#ifdef YP
struct hostent *he;
struct hostent_data *hed;
u_long oresopt;
int error;
res_state statp;
statp = __res_state();
if ((he = __hostent_init()) == NULL ||
(hed = __hostent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
return (NULL);
}
oresopt = statp->options;
statp->options &= ~RES_USE_INET6;
error = _gethostbynisname_r(name, af, he, hed);
statp->options = oresopt;
return (error == 0) ? he : NULL;
#else
return (NULL);
#endif
}
struct hostent *
_gethostbynisaddr(const void *addr, socklen_t len, int af)
{
#ifdef YP
struct hostent *he;
struct hostent_data *hed;
u_long oresopt;
int error;
res_state statp;
statp = __res_state();
if ((he = __hostent_init()) == NULL ||
(hed = __hostent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
return (NULL);
}
oresopt = statp->options;
statp->options &= ~RES_USE_INET6;
error = _gethostbynisaddr_r(addr, len, af, he, hed);
statp->options = oresopt;
return (error == 0) ? he : NULL;
#else
return (NULL);
#endif
}
int
_nis_gethostbyname(void *rval, void *cb_data, va_list ap)
{
#ifdef YP
const char *name;
int af;
char *buffer;
size_t buflen;
int *errnop, *h_errnop;
struct hostent *hptr, he;
struct hostent_data *hed;
res_state statp;
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);
}
if (_gethostbynisname_r(name, af, &he, hed) != 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);
#else
*((struct hostent **)rval) = NULL;
return (NS_UNAVAIL);
#endif
}
int
_nis_gethostbyaddr(void *rval, void *cb_data, va_list ap)
{
#ifdef YP
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;
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);
}
if (_gethostbynisaddr_r(addr, len, af, &he, hed) != 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);
#else
*((struct hostent **)rval) = NULL;
return (NS_UNAVAIL);
#endif
}
