mx_15.c revision 82ca33427bdd4f3bc4ed3431e86bd810fe751674
/*
* Copyright (C) 1998, 1999, 2000 Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/* $Id: mx_15.c,v 1.30 2000/04/28 01:24:05 gson Exp $ */
/* reviewed: Wed Mar 15 18:05:46 PST 2000 by brister */
#ifndef RDATA_GENERIC_MX_15_C
#define RDATA_GENERIC_MX_15_C
#define RRTYPE_MX_ATTRIBUTES (0)
static inline isc_result_t
fromtext_mx(dns_rdataclass_t rdclass, dns_rdatatype_t type,
isc_lex_t *lexer, dns_name_t *origin,
isc_boolean_t downcase, isc_buffer_t *target)
{
isc_token_t token;
dns_name_t name;
isc_buffer_t buffer;
REQUIRE(type == 15);
UNUSED(rdclass);
RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
RETERR(uint16_tobuffer(token.value.as_ulong, target));
RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));
dns_name_init(&name, NULL);
buffer_fromregion(&buffer, &token.value.as_region);
origin = (origin != NULL) ? origin : dns_rootname;
return (dns_name_fromtext(&name, &buffer, origin, downcase, target));
}
static inline isc_result_t
totext_mx(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
isc_buffer_t *target)
{
isc_region_t region;
dns_name_t name;
dns_name_t prefix;
isc_boolean_t sub;
char buf[sizeof "64000"];
unsigned short num;
REQUIRE(rdata->type == 15);
dns_name_init(&name, NULL);
dns_name_init(&prefix, NULL);
dns_rdata_toregion(rdata, &region);
num = uint16_fromregion(&region);
isc_region_consume(&region, 2);
sprintf(buf, "%u", num);
RETERR(str_totext(buf, target));
RETERR(str_totext(" ", target));
dns_name_fromregion(&name, &region);
sub = name_prefix(&name, tctx->origin, &prefix);
return (dns_name_totext(&prefix, sub, target));
}
static inline isc_result_t
fromwire_mx(dns_rdataclass_t rdclass, dns_rdatatype_t type,
isc_buffer_t *source, dns_decompress_t *dctx,
isc_boolean_t downcase, isc_buffer_t *target)
{
dns_name_t name;
isc_region_t sregion;
REQUIRE(type == 15);
UNUSED(rdclass);
if (dns_decompress_edns(dctx) >= 1 || !dns_decompress_strict(dctx))
dns_decompress_setmethods(dctx, DNS_COMPRESS_ALL);
else
dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
dns_name_init(&name, NULL);
isc_buffer_activeregion(source, &sregion);
if (sregion.length < 2)
return (ISC_R_UNEXPECTEDEND);
RETERR(mem_tobuffer(target, sregion.base, 2));
isc_buffer_forward(source, 2);
return (dns_name_fromwire(&name, source, dctx, downcase, target));
}
static inline isc_result_t
towire_mx(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target)
{
dns_name_t name;
isc_region_t region;
REQUIRE(rdata->type == 15);
if (dns_compress_getedns(cctx) >= 1)
dns_compress_setmethods(cctx, DNS_COMPRESS_ALL);
else
dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
dns_rdata_toregion(rdata, &region);
RETERR(mem_tobuffer(target, region.base, 2));
isc_region_consume(&region, 2);
dns_name_init(&name, NULL);
dns_name_fromregion(&name, &region);
return (dns_name_towire(&name, cctx, target));
}
static inline int
compare_mx(dns_rdata_t *rdata1, dns_rdata_t *rdata2)
{
dns_name_t name1;
dns_name_t name2;
isc_region_t region1;
isc_region_t region2;
int order;
REQUIRE(rdata1->type == rdata2->type);
REQUIRE(rdata1->rdclass == rdata2->rdclass);
REQUIRE(rdata1->type == 15);
order = memcmp(rdata1->data, rdata2->data, 2);
if (order != 0)
return (order < 0 ? -1 : 1);
dns_name_init(&name1, NULL);
dns_name_init(&name2, NULL);
dns_rdata_toregion(rdata1, &region1);
dns_rdata_toregion(rdata2, &region2);
isc_region_consume(&region1, 2);
isc_region_consume(&region2, 2);
dns_name_fromregion(&name1, &region1);
dns_name_fromregion(&name2, &region2);
return (dns_name_rdatacompare(&name1, &name2));
}
static inline isc_result_t
fromstruct_mx(dns_rdataclass_t rdclass, dns_rdatatype_t type, void *source,
isc_buffer_t *target)
{
REQUIRE(type == 15);
UNUSED(rdclass);
UNUSED(source);
UNUSED(target);
return (ISC_R_NOTIMPLEMENTED);
}
static inline isc_result_t
tostruct_mx(dns_rdata_t *rdata, void *target, isc_mem_t *mctx)
{
REQUIRE(rdata->type == 15);
UNUSED(rdata);
UNUSED(target);
UNUSED(mctx);
return (ISC_R_NOTIMPLEMENTED);
}
static inline void
freestruct_mx(void *source)
{
REQUIRE(source != NULL);
REQUIRE(ISC_FALSE); /*XXX*/
UNUSED(source);
}
static inline isc_result_t
additionaldata_mx(dns_rdata_t *rdata, dns_additionaldatafunc_t add,
void *arg)
{
dns_name_t name;
isc_region_t region;
REQUIRE(rdata->type == 15);
dns_name_init(&name, NULL);
dns_rdata_toregion(rdata, &region);
isc_region_consume(&region, 2);
dns_name_fromregion(&name, &region);
return ((add)(arg, &name, dns_rdatatype_a));
}
static inline isc_result_t
digest_mx(dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg)
{
isc_region_t r1, r2;
dns_name_t name;
REQUIRE(rdata->type == 15);
dns_rdata_toregion(rdata, &r1);
r2 = r1;
isc_region_consume(&r2, 2);
r1.length = 2;
RETERR((digest)(arg, &r1));
dns_name_init(&name, NULL);
dns_name_fromregion(&name, &r2);
return (dns_name_digest(&name, digest, arg));
}
#endif /* RDATA_GENERIC_MX_15_C */