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293 lines
6.6 KiB
C
293 lines
6.6 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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/*
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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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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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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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sa6_fmt(struct sockaddr_in6 *sa6)
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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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int flags = NI_WITHSCOPEID;
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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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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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inet6_fmt(struct in6_addr * addr)
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{
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struct sockaddr_in6 sa6;
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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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return(sa6_fmt(&sa6));
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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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