2 * Copyright (C) 2004, 2005, 2007, 2010-2012 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2002 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or 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.
26 #include <isc/buffer.h>
29 #include <isc/netaddr.h>
30 #include <isc/print.h>
31 #include <isc/sockaddr.h>
32 #include <isc/string.h>
34 #include "ntp_stdlib.h" /* NTP change for strlcpy, strlcat */
37 isc_netaddr_equal(const isc_netaddr_t *a, const isc_netaddr_t *b) {
38 REQUIRE(a != NULL && b != NULL);
40 if (a->family != b->family)
43 if (a->zone != b->zone)
48 if (a->type.in.s_addr != b->type.in.s_addr)
52 if (memcmp(&a->type.in6, &b->type.in6,
53 sizeof(a->type.in6)) != 0 ||
57 #ifdef ISC_PLATFORM_HAVESYSUNH
59 if (strcmp(a->type.un, b->type.un) != 0)
70 isc_netaddr_eqprefix(const isc_netaddr_t *a, const isc_netaddr_t *b,
71 unsigned int prefixlen)
73 const unsigned char *pa = NULL, *pb = NULL;
74 unsigned int ipabytes = 0; /* Length of whole IP address in bytes */
75 unsigned int nbytes; /* Number of significant whole bytes */
76 unsigned int nbits; /* Number of significant leftover bits */
78 REQUIRE(a != NULL && b != NULL);
80 if (a->family != b->family)
83 if (a->zone != b->zone && b->zone != 0)
88 pa = (const unsigned char *) &a->type.in;
89 pb = (const unsigned char *) &b->type.in;
93 pa = (const unsigned char *) &a->type.in6;
94 pb = (const unsigned char *) &b->type.in6;
102 * Don't crash if we get a pattern like 10.0.0.1/9999999.
104 if (prefixlen > ipabytes * 8)
105 prefixlen = ipabytes * 8;
107 nbytes = prefixlen / 8;
108 nbits = prefixlen % 8;
111 if (memcmp(pa, pb, nbytes) != 0)
115 unsigned int bytea, byteb, mask;
116 INSIST(nbytes < ipabytes);
120 mask = (0xFF << (8-nbits)) & 0xFF;
121 if ((bytea & mask) != (byteb & mask))
128 isc_netaddr_totext(const isc_netaddr_t *netaddr, isc_buffer_t *target) {
129 char abuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
130 char zbuf[sizeof("%4294967295")];
136 REQUIRE(netaddr != NULL);
138 switch (netaddr->family) {
140 type = &netaddr->type.in;
143 type = &netaddr->type.in6;
145 #ifdef ISC_PLATFORM_HAVESYSUNH
147 alen = strlen(netaddr->type.un);
148 if (alen > isc_buffer_availablelength(target))
149 return (ISC_R_NOSPACE);
150 isc_buffer_putmem(target,
151 (const unsigned char *)(netaddr->type.un),
153 return (ISC_R_SUCCESS);
156 return (ISC_R_FAILURE);
158 r = inet_ntop(netaddr->family, type, abuf, sizeof(abuf));
160 return (ISC_R_FAILURE);
162 alen = (unsigned int)strlen(abuf); /* no overflow possible */
163 INSIST(alen < sizeof(abuf));
166 if (netaddr->family == AF_INET6 && netaddr->zone != 0) {
167 zlen = snprintf(zbuf, sizeof(zbuf), "%%%u", netaddr->zone);
169 return (ISC_R_FAILURE);
170 INSIST((unsigned int)zlen < sizeof(zbuf));
173 if (alen + zlen > isc_buffer_availablelength(target))
174 return (ISC_R_NOSPACE);
176 isc_buffer_putmem(target, (unsigned char *)abuf, alen);
177 isc_buffer_putmem(target, (unsigned char *)zbuf, zlen);
179 return (ISC_R_SUCCESS);
183 isc_netaddr_format(const isc_netaddr_t *na, char *array, unsigned int size) {
187 isc_buffer_init(&buf, array, size);
188 result = isc_netaddr_totext(na, &buf);
196 if (result == ISC_R_SUCCESS) {
197 if (isc_buffer_availablelength(&buf) >= 1)
198 isc_buffer_putuint8(&buf, 0);
200 result = ISC_R_NOSPACE;
203 if (result != ISC_R_SUCCESS) {
204 snprintf(array, size,
206 isc_msgcat_get(isc_msgcat, ISC_MSGSET_NETADDR,
208 "unknown address, family"),
210 array[size - 1] = '\0';
216 isc_netaddr_prefixok(const isc_netaddr_t *na, unsigned int prefixlen) {
217 static const unsigned char zeros[16] = { 0 };
218 unsigned int nbits, nbytes, ipbytes = 0;
219 const unsigned char *p;
221 switch (na->family) {
223 p = (const unsigned char *) &na->type.in;
226 return (ISC_R_RANGE);
229 p = (const unsigned char *) &na->type.in6;
232 return (ISC_R_RANGE);
235 return (ISC_R_NOTIMPLEMENTED);
237 nbytes = prefixlen / 8;
238 nbits = prefixlen % 8;
240 if ((p[nbytes] & (0xff>>nbits)) != 0U)
241 return (ISC_R_FAILURE);
244 if (memcmp(p + nbytes, zeros, ipbytes - nbytes) != 0)
245 return (ISC_R_FAILURE);
246 return (ISC_R_SUCCESS);
250 isc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp) {
251 unsigned int nbits = 0, nbytes = 0, ipbytes = 0, i;
252 const unsigned char *p;
256 p = (const unsigned char *) &s->type.in;
260 p = (const unsigned char *) &s->type.in6;
264 return (ISC_R_NOTIMPLEMENTED);
266 for (i = 0; i < ipbytes; i++) {
272 unsigned int c = p[nbytes];
273 while ((c & 0x80) != 0 && nbits < 8) {
277 return (ISC_R_MASKNONCONTIG);
280 for (; i < ipbytes; i++) {
282 return (ISC_R_MASKNONCONTIG);
285 *lenp = nbytes * 8 + nbits;
286 return (ISC_R_SUCCESS);
290 isc_netaddr_fromin(isc_netaddr_t *netaddr, const struct in_addr *ina) {
291 memset(netaddr, 0, sizeof(*netaddr));
292 netaddr->family = AF_INET;
293 netaddr->type.in = *ina;
297 isc_netaddr_fromin6(isc_netaddr_t *netaddr, const struct in6_addr *ina6) {
298 memset(netaddr, 0, sizeof(*netaddr));
299 netaddr->family = AF_INET6;
300 netaddr->type.in6 = *ina6;
304 isc_netaddr_frompath(isc_netaddr_t *netaddr, const char *path) {
305 #ifdef ISC_PLATFORM_HAVESYSUNH
306 if (strlen(path) > sizeof(netaddr->type.un) - 1)
307 return (ISC_R_NOSPACE);
309 memset(netaddr, 0, sizeof(*netaddr));
310 netaddr->family = AF_UNIX;
311 strlcpy(netaddr->type.un, path, sizeof(netaddr->type.un));
313 return (ISC_R_SUCCESS);
317 return (ISC_R_NOTIMPLEMENTED);
323 isc_netaddr_setzone(isc_netaddr_t *netaddr, isc_uint32_t zone) {
324 /* we currently only support AF_INET6. */
325 REQUIRE(netaddr->family == AF_INET6);
327 netaddr->zone = zone;
331 isc_netaddr_getzone(const isc_netaddr_t *netaddr) {
332 return (netaddr->zone);
336 isc_netaddr_fromsockaddr(isc_netaddr_t *t, const isc_sockaddr_t *s) {
337 int family = s->type.sa.sa_family;
341 t->type.in = s->type.sin.sin_addr;
345 memcpy(&t->type.in6, &s->type.sin6.sin6_addr, 16);
346 #ifdef ISC_PLATFORM_HAVESCOPEID
347 t->zone = s->type.sin6.sin6_scope_id;
352 #ifdef ISC_PLATFORM_HAVESYSUNH
354 memcpy(t->type.un, s->type.sunix.sun_path, sizeof(t->type.un));
364 isc_netaddr_any(isc_netaddr_t *netaddr) {
365 memset(netaddr, 0, sizeof(*netaddr));
366 netaddr->family = AF_INET;
367 netaddr->type.in.s_addr = INADDR_ANY;
371 isc_netaddr_any6(isc_netaddr_t *netaddr) {
372 memset(netaddr, 0, sizeof(*netaddr));
373 netaddr->family = AF_INET6;
374 netaddr->type.in6 = in6addr_any;
378 isc_netaddr_ismulticast(isc_netaddr_t *na) {
379 switch (na->family) {
381 return (ISC_TF(ISC_IPADDR_ISMULTICAST(na->type.in.s_addr)));
383 return (ISC_TF(IN6_IS_ADDR_MULTICAST(&na->type.in6)));
385 return (ISC_FALSE); /* XXXMLG ? */
390 isc_netaddr_isexperimental(isc_netaddr_t *na) {
391 switch (na->family) {
393 return (ISC_TF(ISC_IPADDR_ISEXPERIMENTAL(na->type.in.s_addr)));
395 return (ISC_FALSE); /* XXXMLG ? */
400 isc_netaddr_islinklocal(isc_netaddr_t *na) {
401 switch (na->family) {
405 return (ISC_TF(IN6_IS_ADDR_LINKLOCAL(&na->type.in6)));
412 isc_netaddr_issitelocal(isc_netaddr_t *na) {
413 switch (na->family) {
417 return (ISC_TF(IN6_IS_ADDR_SITELOCAL(&na->type.in6)));
424 isc_netaddr_fromv4mapped(isc_netaddr_t *t, const isc_netaddr_t *s) {
427 DE_CONST(s, src); /* Must come before IN6_IS_ADDR_V4MAPPED. */
429 REQUIRE(s->family == AF_INET6);
430 REQUIRE(IN6_IS_ADDR_V4MAPPED(&src->type.in6));
432 memset(t, 0, sizeof(*t));
434 memcpy(&t->type.in, (char *)&src->type.in6 + 12, 4);