HardenedBSD/lib/libifconfig/libifconfig_inet6.c
Warner Losh b3e7694832 Remove $FreeBSD$: two-line .h pattern
Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/
2023-08-16 11:54:16 -06:00

104 lines
3.2 KiB
C

/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND 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/param.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <errno.h>
#include <ifaddrs.h>
#include <string.h>
#include <strings.h>
#include "libifconfig.h"
#include "libifconfig_internal.h"
static int
inet6_prefixlen(struct in6_addr *addr)
{
int prefixlen = 0;
int i;
for (i = 0; i < 4; i++) {
int x = ffs(ntohl(addr->__u6_addr.__u6_addr32[i]));
prefixlen += x == 0 ? 0 : 33 - x;
if (x != 1) {
break;
}
}
return (prefixlen);
}
int
ifconfig_inet6_get_addrinfo(ifconfig_handle_t *h,
const char *name, struct ifaddrs *ifa, struct ifconfig_inet6_addr *addr)
{
struct sockaddr_in6 *netmask;
struct in6_ifreq ifr6;
bzero(addr, sizeof(*addr));
/* Set the address */
addr->sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
/* Set the destination address */
if (ifa->ifa_flags & IFF_POINTOPOINT) {
addr->dstin6 = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
}
/* Set the prefixlen */
netmask = (struct sockaddr_in6 *)ifa->ifa_netmask;
addr->prefixlen = inet6_prefixlen(&netmask->sin6_addr);
/* Set the flags */
strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_name));
ifr6.ifr_addr = *addr->sin6;
if (ifconfig_ioctlwrap(h, AF_INET6, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
return (-1);
}
addr->flags = ifr6.ifr_ifru.ifru_flags6;
/* Set the lifetimes */
memset(&addr->lifetime, 0, sizeof(addr->lifetime));
ifr6.ifr_addr = *addr->sin6;
if (ifconfig_ioctlwrap(h, AF_INET6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) {
return (-1);
}
addr->lifetime = ifr6.ifr_ifru.ifru_lifetime; /* struct copy */
/* Set the vhid */
if (ifa->ifa_data) {
addr->vhid = ((struct if_data *)ifa->ifa_data)->ifi_vhid;
}
return (0);
}