mirror of
https://github.com/isc-projects/bind9.git
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88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*
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* Copyright (C) 1999 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#include <config.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <isc/types.h>
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#include <isc/assertions.h>
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#include <isc/error.h>
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#include <isc/sockaddr.h>
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isc_boolean_t
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isc_sockaddr_equal(isc_sockaddr_t *a, isc_sockaddr_t *b)
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{
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REQUIRE(a != NULL && b != NULL);
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if (a->length != b->length)
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return (ISC_FALSE);
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if (memcmp(&a->type, &b->type, a->length) != 0)
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return (ISC_FALSE);
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return (ISC_TRUE);
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}
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unsigned int
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isc_sockaddr_hash(isc_sockaddr_t *sockaddr, isc_boolean_t address_only) {
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unsigned int length;
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const unsigned char *s;
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unsigned int h = 0;
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unsigned int g;
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/*
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* Provide a hash value for 'sockaddr'.
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*/
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REQUIRE(sockaddr != NULL);
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if (address_only) {
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switch (sockaddr->type.sa.sa_family) {
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case AF_INET:
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return (ntohl(sockaddr->type.sin.sin_addr.s_addr));
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case AF_INET6:
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s = (unsigned char *)&sockaddr->type.sin6.sin6_addr;
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length = sizeof sockaddr->type.sin6.sin6_addr;
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break;
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default:
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UNEXPECTED_ERROR(__FILE__, __LINE__,
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"unknown address family: %d\n",
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(int)sockaddr->type.sa.sa_family);
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s = (unsigned char *)&sockaddr->type;
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length = sockaddr->length;
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}
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} else {
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s = (unsigned char *)&sockaddr->type;
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length = sockaddr->length;
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}
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while (length > 0) {
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h = ( h << 4 ) + *s;
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if ((g = ( h & 0xf0000000 )) != 0) {
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h = h ^ (g >> 24);
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h = h ^ g;
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}
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s++;
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length--;
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}
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return (h);
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}
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