inetutil.c revision 64639aaf7beb84086b88f186ea1fa9ccf0be8c57
/*
* 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
* 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
*/
/*
*/
#include <unistd.h>
#include <libinetutil.h>
#include <strings.h>
#include <stddef.h>
#include <errno.h>
#include <libsocket_priv.h>
/*
* Internet utility functions.
*/
/*
* Given a host-order address, calculate client's default net mask.
* Consult netmasks database to see if net is further subnetted.
* We'll only snag the first netmask that matches our criteria.
* We return the resultant netmask in host order.
*/
void
{
/*
* First check if VLSM is in use.
*/
return;
}
/*
* Fall back on standard classed networks.
*/
else
}
/*
* Checks if the IP addresses `ssp1' and `ssp2' are equal.
*/
const struct sockaddr_storage *ssp2)
{
return (B_FALSE);
return (B_TRUE);
case AF_INET:
case AF_INET6:
}
return (B_FALSE);
}
/*
* Stores the netmask in `mask' for the given prefixlen `plen' and also sets
* `sa_family' in `mask'. Because this function does not require aligned
* access to the data inside of the sockaddr_in/6 structures, the code can
* use offsetof() to find the right place in the incoming structure. Why is
* using that beneficial? Less issues with lint. When using a direct cast
* of the struct sockaddr_storage structure to sockaddr_in6, a lint warning
* is generated because the former is composed of 16bit & 8bit elements whilst
* sockaddr_in6 has a 32bit alignment requirement.
*/
int
{
return (EINVAL);
} else {
if (prefixlen > IPV6_ABITS)
return (EINVAL);
}
while (prefixlen > 0) {
if (prefixlen >= 8) {
*addr++ = 0xFF;
prefixlen -= 8;
continue;
}
prefixlen--;
}
return (0);
}
/*
* Convert a mask to a prefix length.
* Returns prefix length on success, -1 otherwise.
* The comments (above) for plen2mask about the use of `mask' also apply
* to this function and the choice to use offsetof here too.
*/
int
{
int rc = 0;
int limit;
} else {
limit = IPV6_ABITS;
}
while (*addr == 0xff) {
rc += 8;
return (limit);
addr++;
}
while (last != 0) {
rc++;
}
return (rc);
}
/*
* Returns B_TRUE if the address in `ss' is INADDR_ANY for IPv4 or
* :: for IPv6. Otherwise, returns B_FALSE.
*/
{
struct sockaddr_storage data;
case AF_INET:
case AF_INET6:
return (IN6_IS_ADDR_UNSPECIFIED(
}
return (B_FALSE);
}