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/*
* Copyright (C) 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: apl_42.c,v 1.14 2020/09/14 08:40:44 florian Exp $ */
/* RFC3123 */
#ifndef RDATA_IN_1_APL_42_C
#define RDATA_IN_1_APL_42_C
static inline isc_result_t
totext_in_apl(ARGS_TOTEXT) {
isc_region_t sr;
isc_region_t ir;
uint16_t afi;
uint8_t prefix;
uint8_t len;
int neg;
unsigned char buf[16];
char txt[sizeof(" !64000:")];
const char *sep = "";
int n;
REQUIRE(rdata->type == dns_rdatatype_apl);
REQUIRE(rdata->rdclass == dns_rdataclass_in);
UNUSED(tctx);
dns_rdata_toregion(rdata, &sr);
ir.base = buf;
ir.length = sizeof(buf);
while (sr.length > 0) {
INSIST(sr.length >= 4);
afi = uint16_fromregion(&sr);
isc_region_consume(&sr, 2);
prefix = *sr.base;
isc_region_consume(&sr, 1);
len = (*sr.base & 0x7f);
neg = (*sr.base & 0x80) != 0;
isc_region_consume(&sr, 1);
INSIST(len <= sr.length);
n = snprintf(txt, sizeof(txt), "%s%s%u:", sep,
neg ? "!" : "", afi);
INSIST(n < (int)sizeof(txt));
RETERR(isc_str_tobuffer(txt, target));
switch (afi) {
case 1:
INSIST(len <= 4);
INSIST(prefix <= 32);
memset(buf, 0, sizeof(buf));
memmove(buf, sr.base, len);
RETERR(inet_totext(AF_INET, &ir, target));
break;
case 2:
INSIST(len <= 16);
INSIST(prefix <= 128);
memset(buf, 0, sizeof(buf));
memmove(buf, sr.base, len);
RETERR(inet_totext(AF_INET6, &ir, target));
break;
default:
return (ISC_R_NOTIMPLEMENTED);
}
n = snprintf(txt, sizeof(txt), "/%u", prefix);
INSIST(n < (int)sizeof(txt));
RETERR(isc_str_tobuffer(txt, target));
isc_region_consume(&sr, len);
sep = " ";
}
return (ISC_R_SUCCESS);
}
static inline isc_result_t
fromwire_in_apl(ARGS_FROMWIRE) {
isc_region_t sr, sr2;
isc_region_t tr;
uint16_t afi;
uint8_t prefix;
uint8_t len;
REQUIRE(type == dns_rdatatype_apl);
REQUIRE(rdclass == dns_rdataclass_in);
UNUSED(type);
UNUSED(dctx);
UNUSED(rdclass);
UNUSED(options);
isc_buffer_activeregion(source, &sr);
isc_buffer_availableregion(target, &tr);
if (sr.length > tr.length)
return (ISC_R_NOSPACE);
sr2 = sr;
/* Zero or more items */
while (sr.length > 0) {
if (sr.length < 4)
return (ISC_R_UNEXPECTEDEND);
afi = uint16_fromregion(&sr);
isc_region_consume(&sr, 2);
prefix = *sr.base;
isc_region_consume(&sr, 1);
len = (*sr.base & 0x7f);
isc_region_consume(&sr, 1);
if (len > sr.length)
return (ISC_R_UNEXPECTEDEND);
switch (afi) {
case 1:
if (prefix > 32 || len > 4)
return (ISC_R_RANGE);
break;
case 2:
if (prefix > 128 || len > 16)
return (ISC_R_RANGE);
}
if (len > 0 && sr.base[len - 1] == 0)
return (DNS_R_FORMERR);
isc_region_consume(&sr, len);
}
isc_buffer_forward(source, sr2.length);
return (isc_mem_tobuffer(target, sr2.base, sr2.length));
}
static inline isc_result_t
towire_in_apl(ARGS_TOWIRE) {
UNUSED(cctx);
REQUIRE(rdata->type == dns_rdatatype_apl);
REQUIRE(rdata->rdclass == dns_rdataclass_in);
return (isc_mem_tobuffer(target, rdata->data, rdata->length));
}
#endif /* RDATA_IN_1_APL_42_C */
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