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/*-
* 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 <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <nsswitch.h>
#include <arpa/nameser.h>
#ifdef YP
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#endif
#include "netdb_private.h"
#ifdef YP
static int
_getnetbynis(const char *name, char *map, int af, struct netent *ne,
struct netent_data *ned)
{
char *p, *bp, *ep;
char *cp, **q;
char *result;
int resultlen, len;
char ypbuf[YPMAXRECORD + 2];
switch(af) {
case AF_INET:
break;
default:
case AF_INET6:
errno = EAFNOSUPPORT;
return (-1);
}
if (ned->yp_domain == (char *)NULL)
if (yp_get_default_domain (&ned->yp_domain))
return (-1);
if (yp_match(ned->yp_domain, map, name, strlen(name), &result,
&resultlen))
return (-1);
bcopy((char *)result, (char *)&ypbuf, resultlen);
ypbuf[resultlen] = '\0';
free(result);
result = (char *)&ypbuf;
if ((cp = strchr(result, '\n')))
*cp = '\0';
cp = strpbrk(result, " \t");
*cp++ = '\0';
bp = ned->netbuf;
ep = ned->netbuf + sizeof ned->netbuf;
len = strlen(result) + 1;
if (ep - bp < len) {
RES_SET_H_ERRNO(__res_state(), NO_RECOVERY);
return (-1);
}
strlcpy(bp, result, ep - bp);
ne->n_name = bp;
bp += len;
while (*cp == ' ' || *cp == '\t')
cp++;
ne->n_net = inet_network(cp);
ne->n_addrtype = AF_INET;
q = ne->n_aliases = ned->net_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q > &ned->net_aliases[_MAXALIASES - 1])
break;
p = strpbrk(cp, " \t");
if (p != 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;
return (0);
}
#endif /* YP */
int
_nis_getnetbyname(void *rval, void *cb_data, va_list ap)
{
#ifdef YP
const char *name;
char *buffer;
size_t buflen;
int *errnop, *h_errnop;
struct netent *nptr, ne;
struct netent_data *ned;
res_state statp;
name = va_arg(ap, const char *);
nptr = va_arg(ap, struct netent *);
buffer = va_arg(ap, char *);
buflen = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
h_errnop = va_arg(ap, int *);
statp = __res_state();
if ((ned = __netent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_UNAVAIL);
}
if (_getnetbynis(name, "networks.byname", AF_INET, &ne, ned) != 0) {
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
if (__copy_netent(&ne, nptr, buffer, buflen) != 0) {
*errnop = errno;
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_RETURN);
}
*((struct netent **)rval) = nptr;
return (NS_SUCCESS);
#else
return (NS_UNAVAIL);
#endif
}
int
_nis_getnetbyaddr(void *rval, void *cb_data, va_list ap)
{
#ifdef YP
uint32_t addr;
int af;
char *buffer;
size_t buflen;
int *errnop, *h_errnop;
struct netent *nptr, ne;
struct netent_data *ned;
char *str, *cp;
uint32_t net2;
int nn;
unsigned int netbr[4];
char buf[MAXDNAME];
res_state statp;
addr = va_arg(ap, uint32_t);
af = va_arg(ap, int);
nptr = va_arg(ap, struct netent *);
buffer = va_arg(ap, char *);
buflen = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
h_errnop = va_arg(ap, int *);
statp = __res_state();
if ((ned = __netent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_UNAVAIL);
}
if (af != AF_INET) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
errno = EAFNOSUPPORT;
return (NS_UNAVAIL);
}
for (nn = 4, net2 = addr; net2; net2 >>= 8) {
netbr[--nn] = net2 & 0xff;
}
switch (nn) {
case 3: /* Class A */
sprintf(buf, "%u", netbr[3]);
break;
case 2: /* Class B */
sprintf(buf, "%u.%u", netbr[2], netbr[3]);
break;
case 1: /* Class C */
sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]);
break;
case 0: /* Class D - E */
sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1],
netbr[2], netbr[3]);
break;
}
str = (char *)&buf;
cp = str + (strlen(str) - 2);
while(!strcmp(cp, ".0")) {
*cp = '\0';
cp = str + (strlen(str) - 2);
}
if (_getnetbynis(str, "networks.byaddr", af, &ne, ned) != 0) {
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
if (__copy_netent(&ne, nptr, buffer, buflen) != 0) {
*errnop = errno;
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_RETURN);
}
*((struct netent **)rval) = nptr;
return (NS_SUCCESS);
#else
return (NS_UNAVAIL);
#endif /* YP */
}
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