/* $NetBSD: inet6.c,v 1.1 1999/07/17 14:06:25 itojun Exp $ */ /* * 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. */ #include "defs.h" 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(sa1->sin6_addr.s6_addr32[i]); s32_2 = ntohl(sa2->sin6_addr.s6_addr32[i]); if (s32_1 > s32_2) return(0); if (s32_1 < s32_2) return(1); /* otherwide, continue to compare */ } } return(0); } int inet6_lessoreq(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(sa1->sin6_addr.s6_addr32[i]); s32_2 = ntohl(sa2->sin6_addr.s6_addr32[i]); if (s32_1 > s32_2) return(0); if (s32_1 < s32_2) return(1); /* otherwide, continue to compare */ } /* sa1 == sa2 */ return(1); } 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(sa1->sin6_addr.s6_addr32[i]); s32_2 = ntohl(sa2->sin6_addr.s6_addr32[i]); if (s32_1 < s32_2) return(0); if (s32_1 > s32_2) return(1); /* otherwide, continue to compare */ } } return(0); } int inet6_greateroreq(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(sa1->sin6_addr.s6_addr32[i]); s32_2 = ntohl(sa2->sin6_addr.s6_addr32[i]); if (s32_1 < s32_2) return(0); if (s32_1 > s32_2) return(1); /* otherwide, continue to compare */ } /* sa1 == sa2 */ return(1); } 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 * inet6_fmt(struct in6_addr *addr) { static char ip6buf[8][INET6_ADDRSTRLEN]; static int ip6round = 0; char *cp; ip6round = (ip6round + 1) & 7; cp = ip6buf[ip6round]; inet_ntop(AF_INET6, addr, cp, INET6_ADDRSTRLEN); return(cp); } 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]); }