2 * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2002 Internet Software Consortium.
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: netaddr.c,v 1.18.12.9 2004/05/15 03:46:12 jinmei Exp $ */
24 #include <isc/buffer.h>
27 #include <isc/netaddr.h>
28 #include <isc/print.h>
29 #include <isc/sockaddr.h>
30 #include <isc/string.h>
34 isc_netaddr_equal(const isc_netaddr_t *a, const isc_netaddr_t *b) {
35 REQUIRE(a != NULL && b != NULL);
37 if (a->family != b->family)
40 if (a->zone != b->zone)
45 if (a->type.in.s_addr != b->type.in.s_addr)
49 if (memcmp(&a->type.in6, &b->type.in6,
50 sizeof(a->type.in6)) != 0 ||
61 isc_netaddr_eqprefix(const isc_netaddr_t *a, const isc_netaddr_t *b,
62 unsigned int prefixlen)
64 const unsigned char *pa, *pb;
65 unsigned int ipabytes; /* Length of whole IP address in bytes */
66 unsigned int nbytes; /* Number of significant whole bytes */
67 unsigned int nbits; /* Number of significant leftover bits */
69 REQUIRE(a != NULL && b != NULL);
71 if (a->family != b->family)
74 if (a->zone != b->zone)
79 pa = (const unsigned char *) &a->type.in;
80 pb = (const unsigned char *) &b->type.in;
84 pa = (const unsigned char *) &a->type.in6;
85 pb = (const unsigned char *) &b->type.in6;
89 pa = pb = NULL; /* Avoid silly compiler warning. */
90 ipabytes = 0; /* Ditto. */
95 * Don't crash if we get a pattern like 10.0.0.1/9999999.
97 if (prefixlen > ipabytes * 8)
98 prefixlen = ipabytes * 8;
100 nbytes = prefixlen / 8;
101 nbits = prefixlen % 8;
104 if (memcmp(pa, pb, nbytes) != 0)
108 unsigned int bytea, byteb, mask;
109 INSIST(nbytes < ipabytes);
113 mask = (0xFF << (8-nbits)) & 0xFF;
114 if ((bytea & mask) != (byteb & mask))
121 isc_netaddr_totext(const isc_netaddr_t *netaddr, isc_buffer_t *target) {
122 char abuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
123 char zbuf[sizeof("%4294967295")];
129 REQUIRE(netaddr != NULL);
131 switch (netaddr->family) {
133 type = &netaddr->type.in;
136 type = &netaddr->type.in6;
139 return (ISC_R_FAILURE);
141 r = inet_ntop(netaddr->family, type, abuf, sizeof(abuf));
143 return (ISC_R_FAILURE);
146 INSIST(alen < sizeof(abuf));
149 if (netaddr->family == AF_INET6 && netaddr->zone != 0) {
150 zlen = snprintf(zbuf, sizeof(zbuf), "%%%u", netaddr->zone);
152 return (ISC_R_FAILURE);
153 INSIST((unsigned int)zlen < sizeof(zbuf));
156 if (alen + zlen > isc_buffer_availablelength(target))
157 return (ISC_R_NOSPACE);
159 isc_buffer_putmem(target, (unsigned char *)abuf, alen);
160 isc_buffer_putmem(target, (unsigned char *)zbuf, zlen);
162 return (ISC_R_SUCCESS);
166 isc_netaddr_format(const isc_netaddr_t *na, char *array, unsigned int size) {
170 isc_buffer_init(&buf, array, size);
171 result = isc_netaddr_totext(na, &buf);
176 if (result == ISC_R_SUCCESS) {
177 if (isc_buffer_availablelength(&buf) >= 1)
178 isc_buffer_putuint8(&buf, 0);
180 result = ISC_R_NOSPACE;
183 if (result != ISC_R_SUCCESS) {
184 snprintf(array, size,
185 isc_msgcat_get(isc_msgcat, ISC_MSGSET_NETADDR,
187 "<unknown address, family %u>"),
189 array[size - 1] = '\0';
194 isc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp) {
195 unsigned int nbits, nbytes, ipbytes, i;
196 const unsigned char *p;
200 p = (const unsigned char *) &s->type.in;
204 p = (const unsigned char *) &s->type.in6;
209 return (ISC_R_NOTIMPLEMENTED);
212 for (i = 0; i < ipbytes; i++) {
218 unsigned int c = p[nbytes];
219 while ((c & 0x80) != 0 && nbits < 8) {
223 return (ISC_R_MASKNONCONTIG);
226 for (; i < ipbytes; i++) {
228 return (ISC_R_MASKNONCONTIG);
231 *lenp = nbytes * 8 + nbits;
232 return (ISC_R_SUCCESS);
236 isc_netaddr_fromin(isc_netaddr_t *netaddr, const struct in_addr *ina) {
237 memset(netaddr, 0, sizeof(*netaddr));
238 netaddr->family = AF_INET;
239 netaddr->type.in = *ina;
243 isc_netaddr_fromin6(isc_netaddr_t *netaddr, const struct in6_addr *ina6) {
244 memset(netaddr, 0, sizeof(*netaddr));
245 netaddr->family = AF_INET6;
246 netaddr->type.in6 = *ina6;
250 isc_netaddr_setzone(isc_netaddr_t *netaddr, isc_uint32_t zone) {
251 /* we currently only support AF_INET6. */
252 REQUIRE(netaddr->family == AF_INET6);
254 netaddr->zone = zone;
258 isc_netaddr_getzone(const isc_netaddr_t *netaddr) {
259 return (netaddr->zone);
263 isc_netaddr_fromsockaddr(isc_netaddr_t *t, const isc_sockaddr_t *s) {
264 int family = s->type.sa.sa_family;
268 t->type.in = s->type.sin.sin_addr;
272 memcpy(&t->type.in6, &s->type.sin6.sin6_addr, 16);
273 #ifdef ISC_PLATFORM_HAVESCOPEID
274 t->zone = s->type.sin6.sin6_scope_id;
285 isc_netaddr_any(isc_netaddr_t *netaddr) {
286 memset(netaddr, 0, sizeof(*netaddr));
287 netaddr->family = AF_INET;
288 netaddr->type.in.s_addr = INADDR_ANY;
292 isc_netaddr_any6(isc_netaddr_t *netaddr) {
293 memset(netaddr, 0, sizeof(*netaddr));
294 netaddr->family = AF_INET6;
295 netaddr->type.in6 = in6addr_any;
299 isc_netaddr_ismulticast(isc_netaddr_t *na) {
300 switch (na->family) {
302 return (ISC_TF(ISC_IPADDR_ISMULTICAST(na->type.in.s_addr)));
304 return (ISC_TF(IN6_IS_ADDR_MULTICAST(&na->type.in6)));
306 return (ISC_FALSE); /* XXXMLG ? */
311 isc_netaddr_isexperimental(isc_netaddr_t *na) {
312 switch (na->family) {
314 return (ISC_TF(ISC_IPADDR_ISEXPERIMENTAL(na->type.in.s_addr)));
316 return (ISC_FALSE); /* XXXMLG ? */
321 isc_netaddr_islinklocal(isc_netaddr_t *na) {
322 switch (na->family) {
326 return (ISC_TF(IN6_IS_ADDR_LINKLOCAL(&na->type.in6)));
333 isc_netaddr_issitelocal(isc_netaddr_t *na) {
334 switch (na->family) {
338 return (ISC_TF(IN6_IS_ADDR_SITELOCAL(&na->type.in6)));
345 isc_netaddr_fromv4mapped(isc_netaddr_t *t, const isc_netaddr_t *s) {
348 DE_CONST(s, src); /* Must come before IN6_IS_ADDR_V4MAPPED. */
350 REQUIRE(s->family == AF_INET6);
351 REQUIRE(IN6_IS_ADDR_V4MAPPED(&src->type.in6));
353 memset(t, 0, sizeof(*t));
355 memcpy(&t->type.in, (char *)&src->type.in6 + 12, 4);