netaddr.c revision ab023a65562e62b85a824509d829b6fad87e00b1
ebf264ea105fc78b8316a1166bae0624d488d83bMark Andrews * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
a7038d1a0513c8e804937ebc95fc9cb3a46c04f5Mark Andrews * Copyright (C) 1999-2002 Internet Software Consortium.
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson * Permission to use, copy, modify, and distribute this software for any
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson * purpose with or without fee is hereby granted, provided that the above
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson * copyright notice and this permission notice appear in all copies.
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * PERFORMANCE OF THIS SOFTWARE.
ab023a65562e62b85a824509d829b6fad87e00b1Rob Austein/* $Id: netaddr.c,v 1.35 2005/04/27 04:57:13 sra Exp $ */
b356893425f18a2399771faa875e91318f204fb5Andreas Gustafssonisc_netaddr_equal(const isc_netaddr_t *a, const isc_netaddr_t *b) {
b356893425f18a2399771faa875e91318f204fb5Andreas Gustafsson if (a->type.in.s_addr != b->type.in.s_addr)
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafssonisc_netaddr_eqprefix(const isc_netaddr_t *a, const isc_netaddr_t *b,
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson unsigned int ipabytes; /* Length of whole IP address in bytes */
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson unsigned int nbytes; /* Number of significant whole bytes */
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson unsigned int nbits; /* Number of significant leftover bits */
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson pa = pb = NULL; /* Avoid silly compiler warning. */
87cafc5e70f79f2586d067fbdd64f61bbab069d2David Lawrence * Don't crash if we get a pattern like 10.0.0.1/9999999.
8eaa51a6991ea6bc6c9db0b907beacde8dd1fed2Andreas Gustafssonisc_netaddr_totext(const isc_netaddr_t *netaddr, isc_buffer_t *target) {
91cd0f93ad34d23e8b09dca337120f64fbe8f0a1Andreas Gustafsson char abuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
8eaa51a6991ea6bc6c9db0b907beacde8dd1fed2Andreas Gustafsson const char *r;
6526fd032fc418411da3af4201214e95c113d3e2Mark Andrews const void *type;
6526fd032fc418411da3af4201214e95c113d3e2Mark Andrews r = inet_ntop(netaddr->family, type, abuf, sizeof(abuf));
6526fd032fc418411da3af4201214e95c113d3e2Mark Andrews if (netaddr->family == AF_INET6 && netaddr->zone != 0) {
6526fd032fc418411da3af4201214e95c113d3e2Mark Andrews zlen = snprintf(zbuf, sizeof(zbuf), "%%%u", netaddr->zone);
6526fd032fc418411da3af4201214e95c113d3e2Mark Andrews if (alen + zlen > isc_buffer_availablelength(target))
8eaa51a6991ea6bc6c9db0b907beacde8dd1fed2Andreas Gustafsson isc_buffer_putmem(target, (unsigned char *)abuf, alen);
6526fd032fc418411da3af4201214e95c113d3e2Mark Andrews isc_buffer_putmem(target, (unsigned char *)zbuf, zlen);
28e509b145c3d241d1d2d9102fea38afad95bbd4Andreas Gustafssonisc_netaddr_format(const isc_netaddr_t *na, char *array, unsigned int size) {
8eaa51a6991ea6bc6c9db0b907beacde8dd1fed2Andreas Gustafsson * Null terminate.
8eaa51a6991ea6bc6c9db0b907beacde8dd1fed2Andreas Gustafsson if (isc_buffer_availablelength(&buf) >= 1)
9cd6d409b78a6f833b681c13a68fbdc7c024fe66David Lawrence isc_msgcat_get(isc_msgcat, ISC_MSGSET_NETADDR,
9cd6d409b78a6f833b681c13a68fbdc7c024fe66David Lawrence "<unknown address, family %u>"),
4844ed026a9b5a91044e76399cee80a6514cbf0dMark Andrewsisc_netaddr_prefixok(const isc_netaddr_t *na, unsigned int prefixlen) {
4844ed026a9b5a91044e76399cee80a6514cbf0dMark Andrews const unsigned char *p;
4844ed026a9b5a91044e76399cee80a6514cbf0dMark Andrews if (memcmp(p + nbytes, zeros, ipbytes - nbytes) != 0)
87cafc5e70f79f2586d067fbdd64f61bbab069d2David Lawrenceisc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp) {
87cafc5e70f79f2586d067fbdd64f61bbab069d2David Lawrence const unsigned char *p;
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson for (i = 0; i < ipbytes; i++) {
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson if (p[i] != 0xFF)
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson unsigned int c = p[nbytes];
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson if ((c & 0xFF) != 0)
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson for (; i < ipbytes; i++) {
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson if (p[i] != 0)
87cafc5e70f79f2586d067fbdd64f61bbab069d2David Lawrenceisc_netaddr_fromin(isc_netaddr_t *netaddr, const struct in_addr *ina) {
87cafc5e70f79f2586d067fbdd64f61bbab069d2David Lawrenceisc_netaddr_fromin6(isc_netaddr_t *netaddr, const struct in6_addr *ina6) {
4423c99613db1399dbb5c51e86ef0d351a1418c2Mark Andrewsisc_netaddr_frompath(isc_netaddr_t *netaddr, const char *path) {
4423c99613db1399dbb5c51e86ef0d351a1418c2Mark Andrews if (strlen(path) > sizeof(netaddr->type.un) - 1)
e12b02b62c0176646aad3097b3576cd47665e347Mark Andrewsisc_netaddr_setzone(isc_netaddr_t *netaddr, isc_uint32_t zone) {
6526fd032fc418411da3af4201214e95c113d3e2Mark Andrews /* we currently only support AF_INET6. */
6526fd032fc418411da3af4201214e95c113d3e2Mark Andrewsisc_netaddr_getzone(const isc_netaddr_t *netaddr) {
d80da258e377f02f0dcd703b89a1044cc58e949fMichael Graffisc_netaddr_fromsockaddr(isc_netaddr_t *t, const isc_sockaddr_t *s) {
5d82424f5d3c77c092c111b935041fd3dc4b3e98Andreas Gustafsson memcpy(&t->type.in6, &s->type.sin6.sin6_addr, 16);
15683369e0113bd08863a705a8a1785c093455d3Mark Andrews memcpy(t->type.un, s->type.sunix.sun_path, sizeof(t->type.un));
7e361074bc8a2df7a0891a7040eea02ca3a5e286Andreas Gustafssonisc_netaddr_any6(isc_netaddr_t *netaddr) {
d80da258e377f02f0dcd703b89a1044cc58e949fMichael Graff return (ISC_TF(ISC_IPADDR_ISMULTICAST(na->type.in.s_addr)));
d80da258e377f02f0dcd703b89a1044cc58e949fMichael Graff return (ISC_TF(IN6_IS_ADDR_MULTICAST(&na->type.in6)));
22fa4e3206c2048cabaf75a3ae21132fd5542848Mark Andrews return (ISC_TF(ISC_IPADDR_ISEXPERIMENTAL(na->type.in.s_addr)));
79a6a33184abff1999ba13b10922ccb34a2758a5Mark Andrews return (ISC_TF(IN6_IS_ADDR_LINKLOCAL(&na->type.in6)));
79a6a33184abff1999ba13b10922ccb34a2758a5Mark Andrews return (ISC_TF(IN6_IS_ADDR_SITELOCAL(&na->type.in6)));
6eccf5bd07eb9abf65cc08fec4a8fc97b62c0e1bBrian Wellingtonisc_netaddr_fromv4mapped(isc_netaddr_t *t, const isc_netaddr_t *s) {
de6fe5ebe289d8e922b2fd8e8d642b6dd4f2a8efDavid Lawrence DE_CONST(s, src); /* Must come before IN6_IS_ADDR_V4MAPPED. */
900d7d9c9bc443110f9a2b93c94def44093d64b0David Lawrence REQUIRE(IN6_IS_ADDR_V4MAPPED(&src->type.in6));
de6fe5ebe289d8e922b2fd8e8d642b6dd4f2a8efDavid Lawrence memset(t, 0, sizeof(*t));
de6fe5ebe289d8e922b2fd8e8d642b6dd4f2a8efDavid Lawrence memcpy(&t->type.in, (char *)&src->type.in6 + 12, 4);