mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-28 11:57:28 +00:00
293 lines
6.6 KiB
C
293 lines
6.6 KiB
C
/*
|
|
* Copyright (C) 1998 WIDE Project.
|
|
* 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 project 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 PROJECT 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 PROJECT 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.
|
|
*/
|
|
/*
|
|
* Questions concerning this software should be directed to
|
|
* Mickael Hoerdt (hoerdt@clarinet.u-strasbg.fr) LSIIT Strasbourg.
|
|
*
|
|
*/
|
|
/*
|
|
* This program has been derived from pim6dd.
|
|
* The pim6dd program is covered by the license in the accompanying file
|
|
* named "LICENSE.pim6dd".
|
|
*/
|
|
/*
|
|
* This program has been derived from pimd.
|
|
* The pimd program is covered by the license in the accompanying file
|
|
* named "LICENSE.pimd".
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <stdio.h>
|
|
#include <netdb.h>
|
|
#include <string.h>
|
|
#include "defs.h"
|
|
#include "vif.h"
|
|
#include "inet6.h"
|
|
#include <arpa/inet.h>
|
|
|
|
/* flag if address to hostname resolution should be perfomed */
|
|
int numerichost = TRUE;
|
|
|
|
int
|
|
inet6_uvif2scopeid(struct sockaddr_in6 * sa, struct uvif * v)
|
|
{
|
|
if (IN6_IS_ADDR_MULTICAST(&sa->sin6_addr))
|
|
{
|
|
if (IN6_IS_ADDR_MC_LINKLOCAL(&sa->sin6_addr))
|
|
return (v->uv_ifindex);
|
|
if (IN6_IS_ADDR_MC_SITELOCAL(&sa->sin6_addr))
|
|
return (v->uv_siteid);
|
|
}
|
|
else
|
|
{
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sa->sin6_addr))
|
|
return (v->uv_ifindex);
|
|
|
|
if (IN6_IS_ADDR_SITELOCAL(&sa->sin6_addr))
|
|
return (v->uv_siteid);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
inet6_localif_address(struct sockaddr_in6 * sa, struct uvif * v)
|
|
{
|
|
struct phaddr *pa;
|
|
|
|
for (pa = v->uv_addrs; pa; pa = pa->pa_next)
|
|
if (inet6_equal(sa, &pa->pa_addr))
|
|
return (TRUE);
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
int
|
|
inet6_valid_host(struct sockaddr_in6 * addr)
|
|
{
|
|
if (IN6_IS_ADDR_MULTICAST(&addr->sin6_addr))
|
|
return (FALSE);
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
int
|
|
inet6_equal(struct sockaddr_in6 * sa1, struct sockaddr_in6 * sa2)
|
|
{
|
|
if (sa1->sin6_scope_id == sa2->sin6_scope_id &&
|
|
IN6_ARE_ADDR_EQUAL(&sa1->sin6_addr, &sa2->sin6_addr))
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
inet6_lessthan(struct sockaddr_in6 * sa1, struct sockaddr_in6 * sa2)
|
|
{
|
|
u_int32_t s32_1,
|
|
s32_2;
|
|
int i;
|
|
|
|
if (sa1->sin6_scope_id < sa2->sin6_scope_id)
|
|
return (1);
|
|
if (sa1->sin6_scope_id == sa2->sin6_scope_id)
|
|
{
|
|
for (i = 0; i < 4; i++)
|
|
{
|
|
s32_1 = ntohl(*(u_int32_t *)&sa1->sin6_addr.s6_addr[i * 4]);
|
|
s32_2 = ntohl(*(u_int32_t *)&sa2->sin6_addr.s6_addr[i * 4]);
|
|
|
|
if (s32_1 > s32_2)
|
|
return (0);
|
|
if (s32_1 < s32_2)
|
|
return (1);
|
|
|
|
/* otherwide, continue to compare */
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
inet6_greaterthan(struct sockaddr_in6 * sa1, struct sockaddr_in6 * sa2)
|
|
{
|
|
u_int32_t s32_1,
|
|
s32_2;
|
|
int i;
|
|
|
|
if (sa1->sin6_scope_id > sa2->sin6_scope_id)
|
|
return (1);
|
|
if (sa1->sin6_scope_id == sa2->sin6_scope_id)
|
|
{
|
|
for (i = 0; i < 4; i++)
|
|
{
|
|
s32_1 = ntohl(*(u_int32_t *)&sa1->sin6_addr.s6_addr[i * 4]);
|
|
s32_2 = ntohl(*(u_int32_t *)&sa2->sin6_addr.s6_addr[i * 4]);
|
|
|
|
if (s32_1 < s32_2)
|
|
return (0);
|
|
if (s32_1 > s32_2)
|
|
return (1);
|
|
|
|
/* otherwide, continue to compare */
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
inet6_match_prefix(sa1, sa2, mask)
|
|
struct sockaddr_in6 *sa1,
|
|
*sa2;
|
|
struct in6_addr *mask;
|
|
{
|
|
int i;
|
|
|
|
if (sa1->sin6_scope_id != sa2->sin6_scope_id)
|
|
return (0);
|
|
|
|
for (i = 0; i < 16; i++)
|
|
{
|
|
if ((sa1->sin6_addr.s6_addr[i] ^ sa2->sin6_addr.s6_addr[i]) &
|
|
mask->s6_addr[i])
|
|
return (0);
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
|
|
char *
|
|
sa6_fmt(struct sockaddr_in6 *sa6)
|
|
{
|
|
static char ip6buf[8][MAXHOSTNAMELEN];
|
|
static int ip6round = 0;
|
|
int flags = NI_WITHSCOPEID;
|
|
char *cp;
|
|
|
|
ip6round = (ip6round + 1) & 7;
|
|
cp = ip6buf[ip6round];
|
|
|
|
if (numerichost)
|
|
flags |= NI_NUMERICHOST;
|
|
getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, cp, MAXHOSTNAMELEN,
|
|
NULL, 0, flags);
|
|
|
|
return(cp);
|
|
}
|
|
|
|
char *
|
|
inet6_fmt(struct in6_addr * addr)
|
|
{
|
|
struct sockaddr_in6 sa6;
|
|
|
|
|
|
memset(&sa6, 0, sizeof(sa6));
|
|
sa6.sin6_len = sizeof(sa6);
|
|
sa6.sin6_family = AF_INET6;
|
|
sa6.sin6_addr = *addr;
|
|
sa6.sin6_scope_id = 0; /* XXX */
|
|
|
|
return(sa6_fmt(&sa6));
|
|
}
|
|
|
|
char *
|
|
ifindex2str(int ifindex)
|
|
{
|
|
static char ifname[IFNAMSIZ];
|
|
|
|
return (if_indextoname(ifindex, ifname));
|
|
}
|
|
|
|
int
|
|
inet6_mask2plen(struct in6_addr * mask)
|
|
{
|
|
int masklen;
|
|
u_char *p = (u_char *) mask;
|
|
u_char *lim = p + 16;
|
|
|
|
for (masklen = 0; p < lim; p++)
|
|
{
|
|
switch (*p)
|
|
{
|
|
case 0xff:
|
|
masklen += 8;
|
|
break;
|
|
case 0xfe:
|
|
masklen += 7;
|
|
break;
|
|
case 0xfc:
|
|
masklen += 6;
|
|
break;
|
|
case 0xf8:
|
|
masklen += 5;
|
|
break;
|
|
case 0xf0:
|
|
masklen += 4;
|
|
break;
|
|
case 0xe0:
|
|
masklen += 3;
|
|
break;
|
|
case 0xc0:
|
|
masklen += 2;
|
|
break;
|
|
case 0x80:
|
|
masklen += 1;
|
|
break;
|
|
case 0x00:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (masklen);
|
|
}
|
|
|
|
char *
|
|
net6name(struct in6_addr * prefix, struct in6_addr * mask)
|
|
{
|
|
static char ip6buf[8][INET6_ADDRSTRLEN + 4]; /* length of addr/plen */
|
|
static int ip6round = 0;
|
|
char *cp;
|
|
|
|
ip6round = (ip6round + 1) & 7;
|
|
cp = ip6buf[ip6round];
|
|
|
|
inet_ntop(AF_INET6, prefix, cp, INET6_ADDRSTRLEN);
|
|
cp += strlen(cp);
|
|
*cp = '/';
|
|
cp++;
|
|
sprintf(cp, "%d", inet6_mask2plen(mask));
|
|
|
|
return (ip6buf[ip6round]);
|
|
}
|