a_1.c revision b0ba1a6059b6d6c4b3aa77d8bc84cc443b981e01
/*
* Copyright (C) 2005, 2007, 2009, 2014 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC 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: a_1.c,v 1.8 2009/12/04 22:06:37 tbox Exp $ */
/* by Bjorn.Victor@it.uu.se, 2005-05-07 */
/* Based on generic/soa_6.c and generic/mx_15.c */
#ifndef RDATA_CH_3_A_1_C
#define RDATA_CH_3_A_1_C
#include <isc/net.h>
#define RRTYPE_A_ATTRIBUTES (0)
static inline isc_result_t
fromtext_ch_a(ARGS_FROMTEXT) {
isc_token_t token;
dns_name_t name;
isc_buffer_t buffer;
REQUIRE(type == dns_rdatatype_a);
REQUIRE(rdclass == dns_rdataclass_ch); /* 3 */
UNUSED(type);
UNUSED(callbacks);
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
ISC_FALSE));
/* get domain name */
dns_name_init(&name, NULL);
buffer_fromregion(&buffer, &token.value.as_region);
origin = (origin != NULL) ? origin : dns_rootname;
RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
if ((options & DNS_RDATA_CHECKNAMES) != 0 &&
(options & DNS_RDATA_CHECKREVERSE) != 0) {
isc_boolean_t ok;
ok = dns_name_ishostname(&name, ISC_FALSE);
if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
RETTOK(DNS_R_BADNAME);
if (!ok && callbacks != NULL)
warn_badname(&name, lexer, callbacks);
}
/* 16-bit octal address */
RETERR(isc_lex_getoctaltoken(lexer, &token, ISC_FALSE));
if (token.value.as_ulong > 0xffffU)
RETTOK(ISC_R_RANGE);
return (uint16_tobuffer(token.value.as_ulong, target));
}
static inline isc_result_t
totext_ch_a(ARGS_TOTEXT) {
isc_region_t region;
dns_name_t name;
dns_name_t prefix;
isc_boolean_t sub;
char buf[sizeof("0177777")];
isc_uint16_t addr;
REQUIRE(rdata->type == dns_rdatatype_a);
REQUIRE(rdata->rdclass == dns_rdataclass_ch); /* 3 */
REQUIRE(rdata->length != 0);
dns_name_init(&name, NULL);
dns_name_init(&prefix, NULL);
dns_rdata_toregion(rdata, &region);
dns_name_fromregion(&name, &region);
isc_region_consume(&region, name_length(&name));
addr = uint16_fromregion(&region);
sub = name_prefix(&name, tctx->origin, &prefix);
RETERR(dns_name_totext(&prefix, sub, target));
sprintf(buf, "%o", addr); /* note octal */
RETERR(str_totext(" ", target));
return (str_totext(buf, target));
}
static inline isc_result_t
fromwire_ch_a(ARGS_FROMWIRE) {
isc_region_t sregion;
isc_region_t tregion;
dns_name_t name;
REQUIRE(type == dns_rdatatype_a);
REQUIRE(rdclass == dns_rdataclass_ch);
UNUSED(type);
UNUSED(rdclass);
dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
dns_name_init(&name, NULL);
RETERR(dns_name_fromwire(&name, source, dctx, options, target));
isc_buffer_activeregion(source, &sregion);
isc_buffer_availableregion(target, &tregion);
if (sregion.length < 2)
return (ISC_R_UNEXPECTEDEND);
if (tregion.length < 2)
return (ISC_R_NOSPACE);
memmove(tregion.base, sregion.base, 2);
isc_buffer_forward(source, 2);
isc_buffer_add(target, 2);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
towire_ch_a(ARGS_TOWIRE) {
dns_name_t name;
dns_offsets_t offsets;
isc_region_t sregion;
isc_region_t tregion;
REQUIRE(rdata->type == dns_rdatatype_a);
REQUIRE(rdata->rdclass == dns_rdataclass_ch);
REQUIRE(rdata->length != 0);
dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
dns_name_init(&name, offsets);
dns_rdata_toregion(rdata, &sregion);
dns_name_fromregion(&name, &sregion);
isc_region_consume(&sregion, name_length(&name));
RETERR(dns_name_towire(&name, cctx, target));
isc_buffer_availableregion(target, &tregion);
if (tregion.length < 2)
return (ISC_R_NOSPACE);
memmove(tregion.base, sregion.base, 2);
isc_buffer_add(target, 2);
return (ISC_R_SUCCESS);
}
static inline int
compare_ch_a(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 == dns_rdatatype_a);
REQUIRE(rdata1->rdclass == dns_rdataclass_ch);
REQUIRE(rdata1->length != 0);
REQUIRE(rdata2->length != 0);
dns_name_init(&name1, NULL);
dns_name_init(&name2, NULL);
dns_rdata_toregion(rdata1, &region1);
dns_rdata_toregion(rdata2, &region2);
dns_name_fromregion(&name1, &region1);
dns_name_fromregion(&name2, &region2);
isc_region_consume(&region1, name_length(&name1));
isc_region_consume(&region2, name_length(&name2));
order = dns_name_rdatacompare(&name1, &name2);
if (order != 0)
return (order);
order = memcmp(rdata1->data, rdata2->data, 2);
if (order != 0)
order = (order < 0) ? -1 : 1;
return (order);
}
static inline isc_result_t
fromstruct_ch_a(ARGS_FROMSTRUCT) {
dns_rdata_ch_a_t *a = source;
isc_region_t region;
REQUIRE(type == dns_rdatatype_a);
REQUIRE(source != NULL);
REQUIRE(a->common.rdtype == type);
REQUIRE(a->common.rdclass == rdclass);
UNUSED(type);
UNUSED(rdclass);
dns_name_toregion(&a->ch_addr_dom, &region);
RETERR(isc_buffer_copyregion(target, &region));
return (uint16_tobuffer(ntohs(a->ch_addr), target));
}
static inline isc_result_t
tostruct_ch_a(ARGS_TOSTRUCT) {
dns_rdata_ch_a_t *a = target;
isc_region_t region;
dns_name_t name;
REQUIRE(rdata->type == dns_rdatatype_a);
REQUIRE(rdata->rdclass == dns_rdataclass_ch);
REQUIRE(rdata->length != 0);
a->common.rdclass = rdata->rdclass;
a->common.rdtype = rdata->type;
ISC_LINK_INIT(&a->common, link);
dns_rdata_toregion(rdata, &region);
dns_name_init(&name, NULL);
dns_name_fromregion(&name, &region);
isc_region_consume(&region, name_length(&name));
dns_name_init(&a->ch_addr_dom, NULL);
RETERR(name_duporclone(&name, mctx, &a->ch_addr_dom));
a->ch_addr = htons(uint16_fromregion(&region));
a->mctx = mctx;
return (ISC_R_SUCCESS);
}
static inline void
freestruct_ch_a(ARGS_FREESTRUCT) {
dns_rdata_ch_a_t *a = source;
REQUIRE(source != NULL);
REQUIRE(a->common.rdtype == dns_rdatatype_a);
if (a->mctx == NULL)
return;
dns_name_free(&a->ch_addr_dom, a->mctx);
a->mctx = NULL;
}
static inline isc_result_t
additionaldata_ch_a(ARGS_ADDLDATA) {
REQUIRE(rdata->type == dns_rdatatype_a);
REQUIRE(rdata->rdclass == dns_rdataclass_ch);
UNUSED(rdata);
UNUSED(add);
UNUSED(arg);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
digest_ch_a(ARGS_DIGEST) {
isc_region_t r;
dns_name_t name;
REQUIRE(rdata->type == dns_rdatatype_a);
REQUIRE(rdata->rdclass == dns_rdataclass_ch);
dns_rdata_toregion(rdata, &r);
dns_name_init(&name, NULL);
dns_name_fromregion(&name, &r);
isc_region_consume(&r, name_length(&name));
RETERR(dns_name_digest(&name, digest, arg));
return ((digest)(arg, &r));
}
static inline isc_boolean_t
checkowner_ch_a(ARGS_CHECKOWNER) {
REQUIRE(type == dns_rdatatype_a);
REQUIRE(rdclass == dns_rdataclass_ch);
UNUSED(type);
return (dns_name_ishostname(name, wildcard));
}
static inline isc_boolean_t
checknames_ch_a(ARGS_CHECKNAMES) {
isc_region_t region;
dns_name_t name;
REQUIRE(rdata->type == dns_rdatatype_a);
REQUIRE(rdata->rdclass == dns_rdataclass_ch);
UNUSED(owner);
dns_rdata_toregion(rdata, &region);
dns_name_init(&name, NULL);
dns_name_fromregion(&name, &region);
if (!dns_name_ishostname(&name, ISC_FALSE)) {
if (bad != NULL)
dns_name_clone(&name, bad);
return (ISC_FALSE);
}
return (ISC_TRUE);
}
static inline int
casecompare_ch_a(ARGS_COMPARE) {
return (compare_ch_a(rdata1, rdata2));
}
#endif /* RDATA_CH_3_A_1_C */