mx_15.c revision cdc50af0bff41accc02c613b9c6d8cd41b171ffe
/*
* Copyright (C) 1998-2001 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 1.45 2001/02/12 03:04:48 bwelling 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(ARGS_FROMTEXT) {
isc_token_t token;
dns_name_t name;
isc_buffer_t buffer;
REQUIRE(type == 15);
UNUSED(rdclass);
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
ISC_FALSE));
if (token.value.as_ulong > 0xffff)
return (ISC_R_RANGE);
RETERR(uint16_tobuffer(token.value.as_ulong, target));
RETERR(isc_lex_getmastertoken(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(ARGS_TOTEXT) {
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);
REQUIRE(rdata->length != 0);
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(ARGS_FROMWIRE) {
dns_name_t name;
isc_region_t sregion;
REQUIRE(type == 15);
UNUSED(rdclass);
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(ARGS_TOWIRE) {
dns_name_t name;
dns_offsets_t offsets;
isc_region_t region;
REQUIRE(rdata->type == 15);
REQUIRE(rdata->length != 0);
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, offsets);
dns_name_fromregion(&name, &region);
return (dns_name_towire(&name, cctx, target));
}
static inline int
compare_mx(ARGS_COMPARE) {
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);
REQUIRE(rdata1->length != 0);
REQUIRE(rdata2->length != 0);
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(ARGS_FROMSTRUCT) {
dns_rdata_mx_t *mx = source;
isc_region_t region;
REQUIRE(type == 15);
REQUIRE(source != NULL);
REQUIRE(mx->common.rdtype == type);
REQUIRE(mx->common.rdclass == rdclass);
UNUSED(rdclass);
RETERR(uint16_tobuffer(mx->pref, target));
dns_name_toregion(&mx->mx, &region);
return (isc_buffer_copyregion(target, &region));
}
static inline isc_result_t
tostruct_mx(ARGS_TOSTRUCT) {
isc_region_t region;
dns_rdata_mx_t *mx = target;
dns_name_t name;
REQUIRE(rdata->type == 15);
REQUIRE(target != NULL);
REQUIRE(rdata->length != 0);
mx->common.rdclass = rdata->rdclass;
mx->common.rdtype = rdata->type;
ISC_LINK_INIT(&mx->common, link);
dns_name_init(&name, NULL);
dns_rdata_toregion(rdata, &region);
mx->pref = uint16_fromregion(&region);
isc_region_consume(&region, 2);
dns_name_fromregion(&name, &region);
dns_name_init(&mx->mx, NULL);
RETERR(name_duporclone(&name, mctx, &mx->mx));
mx->mctx = mctx;
return (ISC_R_SUCCESS);
}
static inline void
freestruct_mx(ARGS_FREESTRUCT) {
dns_rdata_mx_t *mx = source;
REQUIRE(source != NULL);
REQUIRE(mx->common.rdtype == 15);
if (mx->mctx == NULL)
return;
dns_name_free(&mx->mx, mx->mctx);
mx->mctx = NULL;
}
static inline isc_result_t
additionaldata_mx(ARGS_ADDLDATA) {
dns_name_t name;
dns_offsets_t offsets;
isc_region_t region;
REQUIRE(rdata->type == 15);
dns_name_init(&name, offsets);
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(ARGS_DIGEST) {
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 */