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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* From "tsol_tndb_parser.c 7.24 01/09/05 SMI; TSOL 2.x"
*
* These functions parse entries in the "thrhdb" (remote host database) file.
* Each entry in the file has two fields, separated by a colon. The first
* field is the IP host or network address. The second is the name of the
* template to use (from tnrhtp).
*
* In order to help preserve sanity, we do not allow more than one unescaped
* colon in a line.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <strings.h>
#include <libtsnet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <inet/ip.h>
#include <arpa/inet.h>
#include <nss.h>
#include <errno.h>
/*
* This routine deals with old pre-CIDR subnet address specifications. In the
* bad old days, a subnet was represented as:
*
* Expression Implied Prefix
* 10.1.1.0 /24
* 10.1.0.0 /16
* 10.0.0.0 /8
* 0.0.0.0 /0
*/
static int
get_classful_prefix(in_addr_t addr)
{
int bits;
if (addr == 0)
return (0);
addr = ntohl(addr);
for (bits = IP_ABITS; bits > 0 && (addr & 0xFF) == 0; bits -= 8)
addr >>= 8;
return (bits);
}
/*
* This routine deals with old pre-CIDR network address specifications. In the
* bad old days, a network was represented as:
*
* Expression Implied Prefix
* 10.1.1 /24
* 10.1 /16
* 10 /8
*
* This routine must compute the mask and left-align the address.
*/
static int
get_network_prefix(in_addr_t *addrp)
{
int bits;
in_addr_t addr;
addr = ntohl(*addrp);
for (bits = IP_ABITS; bits > 0 && addr < 0x01000000; bits -= 8)
addr <<= 8;
*addrp = htonl(addr);
return (bits);
}
static boolean_t
parse_address(tsol_rhent_t *rh, const char *addrbuf)
{
int upper_lim;
int len;
const uchar_t *aptr;
if (strchr(addrbuf, ':') == NULL) {
/* IPv4 address */
rh->rh_address.ta_family = AF_INET;
if (inet_pton(AF_INET, addrbuf,
&rh->rh_address.ta_addr_v4) > 0) {
if (rh->rh_prefix == -1)
rh->rh_prefix = get_classful_prefix(rh->
rh_address.ta_addr_v4.s_addr);
} else if ((rh->rh_address.ta_addr_v4.s_addr =
inet_network(addrbuf)) != (in_addr_t)-1) {
len = get_network_prefix(&rh->rh_address.ta_addr_v4.
s_addr);
if (rh->rh_prefix == -1)
rh->rh_prefix = len;
} else {
return (B_FALSE);
}
upper_lim = IP_ABITS;
aptr = (const uchar_t *)&rh->rh_address.ta_addr_v4;
} else {
/* IPv6 address */
rh->rh_address.ta_family = AF_INET6;
if (inet_pton(AF_INET6, addrbuf,
&rh->rh_address.ta_addr_v6) <= 0)
return (B_FALSE);
if (rh->rh_prefix == -1)
rh->rh_prefix = IPV6_ABITS;
upper_lim = IPV6_ABITS;
aptr = (const uchar_t *)&rh->rh_address.ta_addr_v6;
}
if (rh->rh_prefix < 0 || rh->rh_prefix > upper_lim)
return (B_FALSE);
/*
* Verify that there are no bits set in the "host" portion of the
* IP address.
*/
len = rh->rh_prefix;
aptr += len / 8;
if ((len & 7) != 0) {
if ((*aptr++ & (0xff >> (len & 7))) != 0)
return (B_FALSE);
len = (len + 7) & ~7;
}
while (len < upper_lim) {
if (*aptr++ != 0)
return (B_FALSE);
len += 8;
}
return (B_TRUE);
}
tsol_rhent_t *
rhstr_to_ent(tsol_rhstr_t *rhstrp, int *errp, char **errstrp)
{
int len;
int err = 0;
char *cp, *cp2, *errstr;
char *address = rhstrp->address;
char *template = rhstrp->template;
char addrbuf[1024];
tsol_rhent_t *rhentp = NULL;
/*
* The user can specify NULL pointers for these. Make sure that we
* don't have to deal with checking for NULL everywhere by just
* pointing to our own variables if the user gives NULL.
*/
if (errp == NULL)
errp = &err;
if (errstrp == NULL)
errstrp = &errstr;
/* The default, unless we find a more specific error locus. */
*errstrp = address;
if (address == NULL || *address == '#' || *address == '\n') {
*errp = LTSNET_EMPTY;
if (template && *template != '\0' && *template != '#' &&
*template != '\n')
*errstrp = template;
else if (address == NULL)
*errstrp = " ";
goto err_ret;
}
if (*address == '\0') {
*errp = LTSNET_NO_ADDR;
if (template && *template != '\0' && *template != '#' &&
*template != '\n')
*errstrp = template;
goto err_ret;
}
if (template == NULL || *template == '#' || *template == '\n' ||
*template == '\0') {
*errp = LTSNET_NO_HOSTTYPE;
goto err_ret;
}
if ((rhentp = calloc(1, sizeof (*rhentp))) == NULL) {
*errp = LTSNET_SYSERR;
return (NULL);
}
if ((cp = strrchr(address, '/')) != NULL) {
len = cp - address;
if (len >= sizeof (addrbuf)) {
*errp = LTSNET_ILL_ADDR;
goto err_ret;
}
(void) memset(addrbuf, '\0', sizeof (addrbuf));
(void) memcpy(addrbuf, address, len);
cp++;
errno = 0;
rhentp->rh_prefix = strtol(cp, &cp2, 0);
if (errno != 0) {
*errp = LTSNET_SYSERR;
*errstrp = cp2;
goto err_ret;
}
if ((isdigit(*cp) == 0)) {
*errp = LTSNET_ILL_ADDR;
*errstrp = address;
goto err_ret;
}
} else {
rhentp->rh_prefix = -1;
(void) strlcpy(addrbuf, address, sizeof (addrbuf));
}
if (strlcpy(rhentp->rh_template, template,
sizeof (rhentp->rh_template)) >= sizeof (rhentp->rh_template)) {
*errstrp = template;
*errp = LTSNET_ILL_NAME;
goto err_ret;
}
if (!parse_address(rhentp, addrbuf)) {
*errp = LTSNET_ILL_ADDR;
*errstrp = address;
goto err_ret;
}
#ifdef DEBUG
(void) fprintf(stdout, "rhstr_to_ent: %s:%s\n",
address, rhentp->rh_template);
#endif /* DEBUG */
return (rhentp);
err_ret:
err = errno;
tsol_freerhent(rhentp);
errno = err;
#ifdef DEBUG
(void) fprintf(stderr, "\nrhstr_to_ent: %s: %s\n",
*errstrp, (char *)tsol_strerror(*errp, errno));
#endif /* DEBUG */
return (NULL);
}
void
tsol_freerhent(tsol_rhent_t *rh)
{
if (rh != NULL)
free(rh);
}
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