freebsd-dev/lib/libc/net/getnetbynis.c

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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("$FreeBSD$");
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#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
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#include <stdlib.h>
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#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
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#define MAXALIASES 35
#define MAXADDRS 35
#ifdef YP
static char *host_aliases[MAXALIASES];
static struct netent *
_getnetbynis(const char *name, char *map, int af)
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{
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char *cp, **q;
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static char *result;
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int resultlen;
static struct netent h;
static char *domain = (char *)NULL;
static char ypbuf[YPMAXRECORD + 2];
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switch(af) {
case AF_INET:
break;
default:
case AF_INET6:
errno = EAFNOSUPPORT;
return NULL;
}
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if (domain == (char *)NULL)
if (yp_get_default_domain (&domain))
return (NULL);
if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
return (NULL);
bcopy((char *)result, (char *)&ypbuf, resultlen);
ypbuf[resultlen] = '\0';
free(result);
result = (char *)&ypbuf;
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if ((cp = index(result, '\n')))
*cp = '\0';
cp = strpbrk(result, " \t");
*cp++ = '\0';
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h.n_name = result;
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while (*cp == ' ' || *cp == '\t')
cp++;
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h.n_net = inet_network(cp);
h.n_addrtype = AF_INET;
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q = h.n_aliases = host_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &host_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&h);
}
#endif /* YP */
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int
_nis_getnetbyname(void *rval, void *cb_data, va_list ap)
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{
#ifdef YP
const char *name;
name = va_arg(ap, const char *);
*(struct netent **)rval = _getnetbynis(name, "networks.byname", AF_INET);
return (*(struct netent **)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND;
#else
return NS_UNAVAIL;
#endif
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}
int
_nis_getnetbyaddr(void *rval, void *cb_data, va_list ap)
{
#ifdef YP
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unsigned long addr;
int af;
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char *str, *cp;
unsigned long net2;
int nn;
unsigned int netbr[4];
char buf[MAXDNAME];
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addr = va_arg(ap, unsigned long);
af = va_arg(ap, int);
*(struct netent **)rval = NULL;
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if (af != AF_INET) {
errno = EAFNOSUPPORT;
return NS_UNAVAIL;
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}
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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);
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while(!strcmp(cp, ".0")) {
*cp = '\0';
cp = str + (strlen(str) - 2);
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}
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*(struct netent **)rval = _getnetbynis(str, "networks.byaddr", af);
return (*(struct netent**)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND;
#else
return NS_UNAVAIL;
#endif /* YP */
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}