Annotation of embedaddon/ntp/lib/isc/sockaddr.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
3: * Copyright (C) 1999-2003 Internet Software Consortium.
4: *
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.
8: *
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.
16: */
17:
18: /* $Id: sockaddr.c,v 1.70 2007/06/19 23:47:17 tbox Exp $ */
19:
20: /*! \file */
21:
22: #include <config.h>
23:
24: #include <stdio.h>
25:
26: #include <isc/buffer.h>
27: #include <isc/hash.h>
28: #include <isc/msgs.h>
29: #include <isc/netaddr.h>
30: #include <isc/print.h>
31: #include <isc/region.h>
32: #include <isc/sockaddr.h>
33: #include <isc/string.h>
34: #include <isc/util.h>
35:
36: isc_boolean_t
37: isc_sockaddr_equal(const isc_sockaddr_t *a, const isc_sockaddr_t *b) {
38: return (isc_sockaddr_compare(a, b, ISC_SOCKADDR_CMPADDR|
39: ISC_SOCKADDR_CMPPORT|
40: ISC_SOCKADDR_CMPSCOPE));
41: }
42:
43: isc_boolean_t
44: isc_sockaddr_eqaddr(const isc_sockaddr_t *a, const isc_sockaddr_t *b) {
45: return (isc_sockaddr_compare(a, b, ISC_SOCKADDR_CMPADDR|
46: ISC_SOCKADDR_CMPSCOPE));
47: }
48:
49: isc_boolean_t
50: isc_sockaddr_compare(const isc_sockaddr_t *a, const isc_sockaddr_t *b,
51: unsigned int flags)
52: {
53: REQUIRE(a != NULL && b != NULL);
54:
55: if (a->length != b->length)
56: return (ISC_FALSE);
57:
58: /*
59: * We don't just memcmp because the sin_zero field isn't always
60: * zero.
61: */
62:
63: if (a->type.sa.sa_family != b->type.sa.sa_family)
64: return (ISC_FALSE);
65: switch (a->type.sa.sa_family) {
66: case AF_INET:
67: if ((flags & ISC_SOCKADDR_CMPADDR) != 0 &&
68: memcmp(&a->type.sin.sin_addr, &b->type.sin.sin_addr,
69: sizeof(a->type.sin.sin_addr)) != 0)
70: return (ISC_FALSE);
71: if ((flags & ISC_SOCKADDR_CMPPORT) != 0 &&
72: a->type.sin.sin_port != b->type.sin.sin_port)
73: return (ISC_FALSE);
74: break;
75: case AF_INET6:
76: if ((flags & ISC_SOCKADDR_CMPADDR) != 0 &&
77: memcmp(&a->type.sin6.sin6_addr, &b->type.sin6.sin6_addr,
78: sizeof(a->type.sin6.sin6_addr)) != 0)
79: return (ISC_FALSE);
80: #ifdef ISC_PLATFORM_HAVESCOPEID
81: /*
82: * If ISC_SOCKADDR_CMPSCOPEZERO is set then don't return
83: * ISC_FALSE if one of the scopes in zero.
84: */
85: if ((flags & ISC_SOCKADDR_CMPSCOPE) != 0 &&
86: a->type.sin6.sin6_scope_id != b->type.sin6.sin6_scope_id &&
87: ((flags & ISC_SOCKADDR_CMPSCOPEZERO) == 0 ||
88: (a->type.sin6.sin6_scope_id != 0 &&
89: b->type.sin6.sin6_scope_id != 0)))
90: return (ISC_FALSE);
91: #endif
92: if ((flags & ISC_SOCKADDR_CMPPORT) != 0 &&
93: a->type.sin6.sin6_port != b->type.sin6.sin6_port)
94: return (ISC_FALSE);
95: break;
96: default:
97: if (memcmp(&a->type, &b->type, a->length) != 0)
98: return (ISC_FALSE);
99: }
100: return (ISC_TRUE);
101: }
102:
103: isc_boolean_t
104: isc_sockaddr_eqaddrprefix(const isc_sockaddr_t *a, const isc_sockaddr_t *b,
105: unsigned int prefixlen)
106: {
107: isc_netaddr_t na, nb;
108: isc_netaddr_fromsockaddr(&na, a);
109: isc_netaddr_fromsockaddr(&nb, b);
110: return (isc_netaddr_eqprefix(&na, &nb, prefixlen));
111: }
112:
113: isc_result_t
114: isc_sockaddr_totext(const isc_sockaddr_t *sockaddr, isc_buffer_t *target) {
115: isc_result_t result;
116: isc_netaddr_t netaddr;
117: char pbuf[sizeof("65000")];
118: unsigned int plen;
119: isc_region_t avail;
120:
121: REQUIRE(sockaddr != NULL);
122:
123: /*
124: * Do the port first, giving us the opportunity to check for
125: * unsupported address families before calling
126: * isc_netaddr_fromsockaddr().
127: */
128: switch (sockaddr->type.sa.sa_family) {
129: case AF_INET:
130: snprintf(pbuf, sizeof(pbuf), "%u", ntohs(sockaddr->type.sin.sin_port));
131: break;
132: case AF_INET6:
133: snprintf(pbuf, sizeof(pbuf), "%u", ntohs(sockaddr->type.sin6.sin6_port));
134: break;
135: #ifdef ISC_PLAFORM_HAVESYSUNH
136: case AF_UNIX:
137: plen = strlen(sockaddr->type.sunix.sun_path);
138: if (plen >= isc_buffer_availablelength(target))
139: return (ISC_R_NOSPACE);
140:
141: isc_buffer_putmem(target, sockaddr->type.sunix.sun_path, plen);
142:
143: /*
144: * Null terminate after used region.
145: */
146: isc_buffer_availableregion(target, &avail);
147: INSIST(avail.length >= 1);
148: avail.base[0] = '\0';
149:
150: return (ISC_R_SUCCESS);
151: #endif
152: default:
153: return (ISC_R_FAILURE);
154: }
155:
156: plen = strlen(pbuf);
157: INSIST(plen < sizeof(pbuf));
158:
159: isc_netaddr_fromsockaddr(&netaddr, sockaddr);
160: result = isc_netaddr_totext(&netaddr, target);
161: if (result != ISC_R_SUCCESS)
162: return (result);
163:
164: if (1 + plen + 1 > isc_buffer_availablelength(target))
165: return (ISC_R_NOSPACE);
166:
167: isc_buffer_putmem(target, (const unsigned char *)"#", 1);
168: isc_buffer_putmem(target, (const unsigned char *)pbuf, plen);
169:
170: /*
171: * Null terminate after used region.
172: */
173: isc_buffer_availableregion(target, &avail);
174: INSIST(avail.length >= 1);
175: avail.base[0] = '\0';
176:
177: return (ISC_R_SUCCESS);
178: }
179:
180: void
181: isc_sockaddr_format(const isc_sockaddr_t *sa, char *array, unsigned int size) {
182: isc_result_t result;
183: isc_buffer_t buf;
184:
185: isc_buffer_init(&buf, array, size);
186: result = isc_sockaddr_totext(sa, &buf);
187: if (result != ISC_R_SUCCESS) {
188: /*
189: * The message is the same as in netaddr.c.
190: */
191: snprintf(array, size,
192: isc_msgcat_get(isc_msgcat, ISC_MSGSET_NETADDR,
193: ISC_MSG_UNKNOWNADDR,
194: "<unknown address, family %u>"),
195: sa->type.sa.sa_family);
196: array[size - 1] = '\0';
197: }
198: }
199:
200: unsigned int
201: isc_sockaddr_hash(const isc_sockaddr_t *sockaddr, isc_boolean_t address_only) {
202: unsigned int length = 0;
203: const unsigned char *s = NULL;
204: unsigned int h = 0;
205: unsigned int g;
206: unsigned int p = 0;
207: const struct in6_addr *in6;
208:
209: REQUIRE(sockaddr != NULL);
210:
211: switch (sockaddr->type.sa.sa_family) {
212: case AF_INET:
213: s = (const unsigned char *)&sockaddr->type.sin.sin_addr;
214: p = ntohs(sockaddr->type.sin.sin_port);
215: length = sizeof(sockaddr->type.sin.sin_addr.s_addr);
216: break;
217: case AF_INET6:
218: in6 = &sockaddr->type.sin6.sin6_addr;
219: if (IN6_IS_ADDR_V4MAPPED(in6)) {
220: s = (const unsigned char *)&in6[12];
221: length = sizeof(sockaddr->type.sin.sin_addr.s_addr);
222: } else {
223: s = (const unsigned char *)in6;
224: length = sizeof(sockaddr->type.sin6.sin6_addr);
225: }
226: p = ntohs(sockaddr->type.sin6.sin6_port);
227: break;
228: default:
229: UNEXPECTED_ERROR(__FILE__, __LINE__,
230: isc_msgcat_get(isc_msgcat,
231: ISC_MSGSET_SOCKADDR,
232: ISC_MSG_UNKNOWNFAMILY,
233: "unknown address family: %d"),
234: (int)sockaddr->type.sa.sa_family);
235: s = (const unsigned char *)&sockaddr->type;
236: length = sockaddr->length;
237: p = 0;
238: }
239:
240: h = isc_hash_calc(s, length, ISC_TRUE);
241: if (!address_only) {
242: g = isc_hash_calc((const unsigned char *)&p, sizeof(p),
243: ISC_TRUE);
244: h = h ^ g; /* XXX: we should concatenate h and p first */
245: }
246:
247: return (h);
248: }
249:
250: void
251: isc_sockaddr_any(isc_sockaddr_t *sockaddr)
252: {
253: memset(sockaddr, 0, sizeof(*sockaddr));
254: sockaddr->type.sin.sin_family = AF_INET;
255: #ifdef ISC_PLATFORM_HAVESALEN
256: sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
257: #endif
258: sockaddr->type.sin.sin_addr.s_addr = INADDR_ANY;
259: sockaddr->type.sin.sin_port = 0;
260: sockaddr->length = sizeof(sockaddr->type.sin);
261: ISC_LINK_INIT(sockaddr, link);
262: }
263:
264: void
265: isc_sockaddr_any6(isc_sockaddr_t *sockaddr)
266: {
267: memset(sockaddr, 0, sizeof(*sockaddr));
268: sockaddr->type.sin6.sin6_family = AF_INET6;
269: #ifdef ISC_PLATFORM_HAVESALEN
270: sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
271: #endif
272: sockaddr->type.sin6.sin6_addr = in6addr_any;
273: sockaddr->type.sin6.sin6_port = 0;
274: sockaddr->length = sizeof(sockaddr->type.sin6);
275: ISC_LINK_INIT(sockaddr, link);
276: }
277:
278: void
279: isc_sockaddr_fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina,
280: in_port_t port)
281: {
282: memset(sockaddr, 0, sizeof(*sockaddr));
283: sockaddr->type.sin.sin_family = AF_INET;
284: #ifdef ISC_PLATFORM_HAVESALEN
285: sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
286: #endif
287: sockaddr->type.sin.sin_addr = *ina;
288: sockaddr->type.sin.sin_port = htons(port);
289: sockaddr->length = sizeof(sockaddr->type.sin);
290: ISC_LINK_INIT(sockaddr, link);
291: }
292:
293: void
294: isc_sockaddr_anyofpf(isc_sockaddr_t *sockaddr, int pf) {
295: switch (pf) {
296: case AF_INET:
297: isc_sockaddr_any(sockaddr);
298: break;
299: case AF_INET6:
300: isc_sockaddr_any6(sockaddr);
301: break;
302: default:
303: INSIST(0);
304: }
305: }
306:
307: void
308: isc_sockaddr_fromin6(isc_sockaddr_t *sockaddr, const struct in6_addr *ina6,
309: in_port_t port)
310: {
311: memset(sockaddr, 0, sizeof(*sockaddr));
312: sockaddr->type.sin6.sin6_family = AF_INET6;
313: #ifdef ISC_PLATFORM_HAVESALEN
314: sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
315: #endif
316: sockaddr->type.sin6.sin6_addr = *ina6;
317: sockaddr->type.sin6.sin6_port = htons(port);
318: sockaddr->length = sizeof(sockaddr->type.sin6);
319: ISC_LINK_INIT(sockaddr, link);
320: }
321:
322: void
323: isc_sockaddr_v6fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina,
324: in_port_t port)
325: {
326: memset(sockaddr, 0, sizeof(*sockaddr));
327: sockaddr->type.sin6.sin6_family = AF_INET6;
328: #ifdef ISC_PLATFORM_HAVESALEN
329: sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
330: #endif
331: sockaddr->type.sin6.sin6_addr.s6_addr[10] = 0xff;
332: sockaddr->type.sin6.sin6_addr.s6_addr[11] = 0xff;
333: memcpy(&sockaddr->type.sin6.sin6_addr.s6_addr[12], ina, 4);
334: sockaddr->type.sin6.sin6_port = htons(port);
335: sockaddr->length = sizeof(sockaddr->type.sin6);
336: ISC_LINK_INIT(sockaddr, link);
337: }
338:
339: int
340: isc_sockaddr_pf(const isc_sockaddr_t *sockaddr) {
341:
342: /*
343: * Get the protocol family of 'sockaddr'.
344: */
345:
346: #if (AF_INET == PF_INET && AF_INET6 == PF_INET6)
347: /*
348: * Assume that PF_xxx == AF_xxx for all AF and PF.
349: */
350: return (sockaddr->type.sa.sa_family);
351: #else
352: switch (sockaddr->type.sa.sa_family) {
353: case AF_INET:
354: return (PF_INET);
355: case AF_INET6:
356: return (PF_INET6);
357: default:
358: FATAL_ERROR(__FILE__, __LINE__,
359: isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
360: ISC_MSG_UNKNOWNFAMILY,
361: "unknown address family: %d"),
362: (int)sockaddr->type.sa.sa_family);
363: }
364: #endif
365: }
366:
367: void
368: isc_sockaddr_fromnetaddr(isc_sockaddr_t *sockaddr, const isc_netaddr_t *na,
369: in_port_t port)
370: {
371: memset(sockaddr, 0, sizeof(*sockaddr));
372: sockaddr->type.sin.sin_family = (short)na->family;
373: switch (na->family) {
374: case AF_INET:
375: sockaddr->length = sizeof(sockaddr->type.sin);
376: #ifdef ISC_PLATFORM_HAVESALEN
377: sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
378: #endif
379: sockaddr->type.sin.sin_addr = na->type.in;
380: sockaddr->type.sin.sin_port = htons(port);
381: break;
382: case AF_INET6:
383: sockaddr->length = sizeof(sockaddr->type.sin6);
384: #ifdef ISC_PLATFORM_HAVESALEN
385: sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
386: #endif
387: memcpy(&sockaddr->type.sin6.sin6_addr, &na->type.in6, 16);
388: #ifdef ISC_PLATFORM_HAVESCOPEID
389: sockaddr->type.sin6.sin6_scope_id = isc_netaddr_getzone(na);
390: #endif
391: sockaddr->type.sin6.sin6_port = htons(port);
392: break;
393: default:
394: INSIST(0);
395: }
396: ISC_LINK_INIT(sockaddr, link);
397: }
398:
399: void
400: isc_sockaddr_setport(isc_sockaddr_t *sockaddr, in_port_t port) {
401: switch (sockaddr->type.sa.sa_family) {
402: case AF_INET:
403: sockaddr->type.sin.sin_port = htons(port);
404: break;
405: case AF_INET6:
406: sockaddr->type.sin6.sin6_port = htons(port);
407: break;
408: default:
409: FATAL_ERROR(__FILE__, __LINE__,
410: isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
411: ISC_MSG_UNKNOWNFAMILY,
412: "unknown address family: %d"),
413: (int)sockaddr->type.sa.sa_family);
414: }
415: }
416:
417: in_port_t
418: isc_sockaddr_getport(const isc_sockaddr_t *sockaddr) {
419: in_port_t port = 0;
420:
421: switch (sockaddr->type.sa.sa_family) {
422: case AF_INET:
423: port = ntohs(sockaddr->type.sin.sin_port);
424: break;
425: case AF_INET6:
426: port = ntohs(sockaddr->type.sin6.sin6_port);
427: break;
428: default:
429: FATAL_ERROR(__FILE__, __LINE__,
430: isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
431: ISC_MSG_UNKNOWNFAMILY,
432: "unknown address family: %d"),
433: (int)sockaddr->type.sa.sa_family);
434: }
435:
436: return (port);
437: }
438:
439: isc_boolean_t
440: isc_sockaddr_ismulticast(const isc_sockaddr_t *sockaddr) {
441: isc_netaddr_t netaddr;
442:
443: if (sockaddr->type.sa.sa_family == AF_INET ||
444: sockaddr->type.sa.sa_family == AF_INET6) {
445: isc_netaddr_fromsockaddr(&netaddr, sockaddr);
446: return (isc_netaddr_ismulticast(&netaddr));
447: }
448: return (ISC_FALSE);
449: }
450:
451: isc_boolean_t
452: isc_sockaddr_isexperimental(const isc_sockaddr_t *sockaddr) {
453: isc_netaddr_t netaddr;
454:
455: if (sockaddr->type.sa.sa_family == AF_INET) {
456: isc_netaddr_fromsockaddr(&netaddr, sockaddr);
457: return (isc_netaddr_isexperimental(&netaddr));
458: }
459: return (ISC_FALSE);
460: }
461:
462: isc_boolean_t
463: isc_sockaddr_issitelocal(const isc_sockaddr_t *sockaddr) {
464: isc_netaddr_t netaddr;
465:
466: if (sockaddr->type.sa.sa_family == AF_INET6) {
467: isc_netaddr_fromsockaddr(&netaddr, sockaddr);
468: return (isc_netaddr_issitelocal(&netaddr));
469: }
470: return (ISC_FALSE);
471: }
472:
473: isc_boolean_t
474: isc_sockaddr_islinklocal(const isc_sockaddr_t *sockaddr) {
475: isc_netaddr_t netaddr;
476:
477: if (sockaddr->type.sa.sa_family == AF_INET6) {
478: isc_netaddr_fromsockaddr(&netaddr, sockaddr);
479: return (isc_netaddr_islinklocal(&netaddr));
480: }
481: return (ISC_FALSE);
482: }
483:
484: isc_result_t
485: isc_sockaddr_frompath(isc_sockaddr_t *sockaddr, const char *path) {
486: #ifdef ISC_PLATFORM_HAVESYSUNH
487: if (strlen(path) >= sizeof(sockaddr->type.sunix.sun_path))
488: return (ISC_R_NOSPACE);
489: memset(sockaddr, 0, sizeof(*sockaddr));
490: sockaddr->length = sizeof(sockaddr->type.sunix);
491: sockaddr->type.sunix.sun_family = AF_UNIX;
492: #ifdef ISC_PLATFORM_HAVESALEN
493: sockaddr->type.sunix.sun_len =
494: (unsigned char)sizeof(sockaddr->type.sunix);
495: #endif
496: strcpy(sockaddr->type.sunix.sun_path, path);
497: return (ISC_R_SUCCESS);
498: #else
499: UNUSED(sockaddr);
500: UNUSED(path);
501: return (ISC_R_NOTIMPLEMENTED);
502: #endif
503: }
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