netaddr.c revision dafcb997e390efa4423883dafd100c975c4095d6
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
12b42c76672a66c2d4ea7212c14f8f1b5a62b78dTom Gundersen * Copyright (C) 1999-2002 Internet Software Consortium.
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * Permission to use, copy, modify, and distribute this software for any
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * purpose with or without fee is hereby granted, provided that the above
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * copyright notice and this permission notice appear in all copies.
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
ffa16db02673ffa155ffb2649e72a935a1ff70f5Lennart Poettering * PERFORMANCE OF THIS SOFTWARE.
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering/* $Id: netaddr.c,v 1.27 2004/03/05 05:10:47 marka Exp $ */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_equal(const isc_netaddr_t *a, const isc_netaddr_t *b) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek REQUIRE(a != NULL && b != NULL);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if (a->type.in.s_addr != b->type.in.s_addr)
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if (memcmp(&a->type.in6, &b->type.in6,
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_eqprefix(const isc_netaddr_t *a, const isc_netaddr_t *b,
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek unsigned int ipabytes; /* Length of whole IP address in bytes */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek unsigned int nbytes; /* Number of significant whole bytes */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek unsigned int nbits; /* Number of significant leftover bits */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek REQUIRE(a != NULL && b != NULL);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek pa = (const unsigned char *) &a->type.in;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek pb = (const unsigned char *) &b->type.in;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek pa = (const unsigned char *) &a->type.in6;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek pb = (const unsigned char *) &b->type.in6;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek pa = pb = NULL; /* Avoid silly compiler warning. */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek * Don't crash if we get a pattern like 10.0.0.1/9999999.
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if (memcmp(pa, pb, nbytes) != 0)
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek unsigned int bytea, byteb, mask;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek mask = (0xFF << (8-nbits)) & 0xFF;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if ((bytea & mask) != (byteb & mask))
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_totext(const isc_netaddr_t *netaddr, isc_buffer_t *target) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek char abuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek char zbuf[sizeof("%4294967295")];
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek r = inet_ntop(netaddr->family, type, abuf, sizeof(abuf));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if (netaddr->family == AF_INET6 && netaddr->zone != 0) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek zlen = snprintf(zbuf, sizeof(zbuf), "%%%u", netaddr->zone);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek INSIST((unsigned int)zlen < sizeof(zbuf));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if (alen + zlen > isc_buffer_availablelength(target))
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek isc_buffer_putmem(target, (unsigned char *)abuf, alen);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek isc_buffer_putmem(target, (unsigned char *)zbuf, zlen);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_format(const isc_netaddr_t *na, char *array, unsigned int size) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek isc_buffer_init(&buf, array, size);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek result = isc_netaddr_totext(na, &buf);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek * Null terminate.
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if (isc_buffer_availablelength(&buf) >= 1)
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek isc_msgcat_get(isc_msgcat, ISC_MSGSET_NETADDR,
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek "<unknown address, family %u>"),
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek unsigned int nbits, nbytes, ipbytes, i;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek const unsigned char *p;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek p = (const unsigned char *) &s->type.in;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek p = (const unsigned char *) &s->type.in6;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek for (i = 0; i < ipbytes; i++) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if (p[i] != 0xFF)
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek unsigned int c = p[nbytes];
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek while ((c & 0x80) != 0 && nbits < 8) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek if ((c & 0xFF) != 0)
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek for (; i < ipbytes; i++) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_fromin(isc_netaddr_t *netaddr, const struct in_addr *ina) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek memset(netaddr, 0, sizeof(*netaddr));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_fromin6(isc_netaddr_t *netaddr, const struct in6_addr *ina6) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek memset(netaddr, 0, sizeof(*netaddr));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_setzone(isc_netaddr_t *netaddr, isc_uint32_t zone) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek /* we currently only support AF_INET6. */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek REQUIRE(netaddr->family == AF_INET6);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_getzone(const isc_netaddr_t *netaddr) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_fromsockaddr(isc_netaddr_t *t, const isc_sockaddr_t *s) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek int family = s->type.sa.sa_family;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek t->type.in = s->type.sin.sin_addr;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek memcpy(&t->type.in6, &s->type.sin6.sin6_addr, 16);
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek t->zone = s->type.sin6.sin6_scope_id;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_any(isc_netaddr_t *netaddr) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek memset(netaddr, 0, sizeof(*netaddr));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek netaddr->type.in.s_addr = INADDR_ANY;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_any6(isc_netaddr_t *netaddr) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek memset(netaddr, 0, sizeof(*netaddr));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek netaddr->type.in6 = in6addr_any;
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_ismulticast(isc_netaddr_t *na) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek return (ISC_TF(ISC_IPADDR_ISMULTICAST(na->type.in.s_addr)));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek return (ISC_TF(IN6_IS_ADDR_MULTICAST(&na->type.in6)));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek return (ISC_FALSE); /* XXXMLG ? */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_isexperimental(isc_netaddr_t *na) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek return (ISC_TF(ISC_IPADDR_ISEXPERIMENTAL(na->type.in.s_addr)));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek return (ISC_FALSE); /* XXXMLG ? */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_islinklocal(isc_netaddr_t *na) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek return (ISC_TF(IN6_IS_ADDR_LINKLOCAL(&na->type.in6)));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_issitelocal(isc_netaddr_t *na) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek return (ISC_TF(IN6_IS_ADDR_SITELOCAL(&na->type.in6)));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmekisc_netaddr_fromv4mapped(isc_netaddr_t *t, const isc_netaddr_t *s) {
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek DE_CONST(s, src); /* Must come before IN6_IS_ADDR_V4MAPPED. */
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek REQUIRE(IN6_IS_ADDR_V4MAPPED(&src->type.in6));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek memset(t, 0, sizeof(*t));
798d3a524ea57aaf40cb53858aaa45ec702f012dZbigniew Jędrzejewski-Szmek memcpy(&t->type.in, (char *)&src->type.in6 + 12, 4);