0fea3d5165
kernel IPv6 multicast routing support. pim6 dense mode daemon pim6 sparse mode daemon netstat support of IPv6 multicast routing statistics Merging to the current and testing with other existing multicast routers is done by Tatsuya Jinmei <jinmei@kame.net>, who writes and maintainances the base code in KAME distribution. Make world check and kernel build check was also successful.
284 lines
6.5 KiB
C
284 lines
6.5 KiB
C
/*
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* Copyright (C) 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Questions concerning this software should be directed to
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* Mickael Hoerdt (hoerdt@clarinet.u-strasbg.fr) LSIIT Strasbourg.
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*
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*/
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/*
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* This program has been derived from pim6dd.
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* The pim6dd program is covered by the license in the accompanying file
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* named "LICENSE.pim6dd".
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*/
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/*
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* This program has been derived from pimd.
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* The pimd program is covered by the license in the accompanying file
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* named "LICENSE.pimd".
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*
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*/
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#include <stdio.h>
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#include <netdb.h>
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#include <string.h>
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#include "defs.h"
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#include "vif.h"
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#include "inet6.h"
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#include <arpa/inet.h>
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/* flag if address to hostname resolution should be perfomed */
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int numerichost = TRUE;
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int
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inet6_uvif2scopeid(struct sockaddr_in6 * sa, struct uvif * v)
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{
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if (IN6_IS_ADDR_MULTICAST(&sa->sin6_addr))
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{
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if (IN6_IS_ADDR_MC_LINKLOCAL(&sa->sin6_addr))
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return (v->uv_ifindex);
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if (IN6_IS_ADDR_MC_SITELOCAL(&sa->sin6_addr))
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return (v->uv_siteid);
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}
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else
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{
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if (IN6_IS_ADDR_LINKLOCAL(&sa->sin6_addr))
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return (v->uv_ifindex);
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if (IN6_IS_ADDR_SITELOCAL(&sa->sin6_addr))
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return (v->uv_siteid);
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}
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return (0);
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}
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int
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inet6_localif_address(struct sockaddr_in6 * sa, struct uvif * v)
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{
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struct phaddr *pa;
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for (pa = v->uv_addrs; pa; pa = pa->pa_next)
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if (inet6_equal(sa, &pa->pa_addr))
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return (TRUE);
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return (FALSE);
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}
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int
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inet6_valid_host(struct sockaddr_in6 * addr)
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{
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if (IN6_IS_ADDR_MULTICAST(&addr->sin6_addr))
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return (FALSE);
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return (TRUE);
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}
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int
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inet6_equal(struct sockaddr_in6 * sa1, struct sockaddr_in6 * sa2)
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{
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if (sa1->sin6_scope_id == sa2->sin6_scope_id &&
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IN6_ARE_ADDR_EQUAL(&sa1->sin6_addr, &sa2->sin6_addr))
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return (1);
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return (0);
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}
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int
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inet6_lessthan(struct sockaddr_in6 * sa1, struct sockaddr_in6 * sa2)
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{
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u_int32_t s32_1,
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s32_2;
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int i;
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if (sa1->sin6_scope_id < sa2->sin6_scope_id)
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return (1);
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if (sa1->sin6_scope_id == sa2->sin6_scope_id)
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{
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for (i = 0; i < 4; i++)
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{
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s32_1 = ntohl(*(u_int32_t *)&sa1->sin6_addr.s6_addr[i * 4]);
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s32_2 = ntohl(*(u_int32_t *)&sa2->sin6_addr.s6_addr[i * 4]);
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if (s32_1 > s32_2)
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return (0);
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if (s32_1 < s32_2)
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return (1);
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/* otherwide, continue to compare */
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}
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}
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return (0);
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}
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int
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inet6_greaterthan(struct sockaddr_in6 * sa1, struct sockaddr_in6 * sa2)
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{
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u_int32_t s32_1,
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s32_2;
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int i;
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if (sa1->sin6_scope_id > sa2->sin6_scope_id)
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return (1);
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if (sa1->sin6_scope_id == sa2->sin6_scope_id)
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{
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for (i = 0; i < 4; i++)
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{
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s32_1 = ntohl(*(u_int32_t *)&sa1->sin6_addr.s6_addr[i * 4]);
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s32_2 = ntohl(*(u_int32_t *)&sa2->sin6_addr.s6_addr[i * 4]);
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if (s32_1 < s32_2)
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return (0);
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if (s32_1 > s32_2)
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return (1);
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/* otherwide, continue to compare */
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}
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}
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return (0);
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}
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int
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inet6_match_prefix(sa1, sa2, mask)
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struct sockaddr_in6 *sa1,
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*sa2;
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struct in6_addr *mask;
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{
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int i;
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if (sa1->sin6_scope_id != sa2->sin6_scope_id)
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return (0);
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for (i = 0; i < 16; i++)
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{
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if ((sa1->sin6_addr.s6_addr[i] ^ sa2->sin6_addr.s6_addr[i]) &
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mask->s6_addr[i])
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return (0);
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}
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return (1);
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}
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char *
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inet6_fmt(struct in6_addr * addr)
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{
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static char ip6buf[8][MAXHOSTNAMELEN];
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static int ip6round = 0;
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char *cp;
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struct sockaddr_in6 sa6;
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int flags = NI_WITHSCOPEID;
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ip6round = (ip6round + 1) & 7;
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cp = ip6buf[ip6round];
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memset(&sa6, 0, sizeof(sa6));
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sa6.sin6_len = sizeof(sa6);
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sa6.sin6_family = AF_INET6;
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sa6.sin6_addr = *addr;
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sa6.sin6_scope_id = 0; /* XXX */
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if (numerichost)
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flags |= NI_NUMERICHOST;
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getnameinfo((struct sockaddr *)&sa6, sa6.sin6_len, cp, MAXHOSTNAMELEN,
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NULL, 0, flags);
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return(cp);
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}
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char *
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ifindex2str(int ifindex)
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{
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static char ifname[IFNAMSIZ];
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return (if_indextoname(ifindex, ifname));
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}
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int
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inet6_mask2plen(struct in6_addr * mask)
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{
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int masklen;
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u_char *p = (u_char *) mask;
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u_char *lim = p + 16;
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for (masklen = 0; p < lim; p++)
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{
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switch (*p)
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{
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case 0xff:
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masklen += 8;
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break;
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case 0xfe:
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masklen += 7;
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break;
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case 0xfc:
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masklen += 6;
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break;
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case 0xf8:
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masklen += 5;
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break;
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case 0xf0:
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masklen += 4;
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break;
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case 0xe0:
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masklen += 3;
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break;
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case 0xc0:
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masklen += 2;
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break;
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case 0x80:
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masklen += 1;
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break;
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case 0x00:
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break;
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}
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}
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return (masklen);
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}
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char *
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net6name(struct in6_addr * prefix, struct in6_addr * mask)
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{
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static char ip6buf[8][INET6_ADDRSTRLEN + 4]; /* length of addr/plen */
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static int ip6round = 0;
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char *cp;
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ip6round = (ip6round + 1) & 7;
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cp = ip6buf[ip6round];
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inet_ntop(AF_INET6, prefix, cp, INET6_ADDRSTRLEN);
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cp += strlen(cp);
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*cp = '/';
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cp++;
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sprintf(cp, "%d", inet6_mask2plen(mask));
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return (ip6buf[ip6round]);
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}
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