1 /* 2 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 10 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 14 * PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 /* $Id: nxt_30.c,v 1.13 2020/09/14 08:40:43 florian Exp $ */ 18 19 /* reviewed: Wed Mar 15 18:21:15 PST 2000 by brister */ 20 21 /* RFC2535 */ 22 23 #ifndef RDATA_GENERIC_NXT_30_C 24 #define RDATA_GENERIC_NXT_30_C 25 26 /* 27 * The attributes do not include DNS_RDATATYPEATTR_SINGLETON 28 * because we must be able to handle a parent/child NXT pair. 29 */ 30 31 static inline isc_result_t 32 totext_nxt(ARGS_TOTEXT) { 33 isc_region_t sr; 34 unsigned int i, j; 35 dns_name_t name; 36 dns_name_t prefix; 37 int sub; 38 39 REQUIRE(rdata->type == dns_rdatatype_nxt); 40 REQUIRE(rdata->length != 0); 41 42 dns_name_init(&name, NULL); 43 dns_name_init(&prefix, NULL); 44 dns_rdata_toregion(rdata, &sr); 45 dns_name_fromregion(&name, &sr); 46 isc_region_consume(&sr, name_length(&name)); 47 sub = name_prefix(&name, tctx->origin, &prefix); 48 RETERR(dns_name_totext(&prefix, sub, target)); 49 50 for (i = 0; i < sr.length; i++) { 51 if (sr.base[i] != 0) 52 for (j = 0; j < 8; j++) 53 if ((sr.base[i] & (0x80 >> j)) != 0) { 54 dns_rdatatype_t t = i * 8 + j; 55 RETERR(isc_str_tobuffer(" ", target)); 56 RETERR(dns_rdatatype_totext(t, target)); 57 } 58 } 59 return (ISC_R_SUCCESS); 60 } 61 62 static inline isc_result_t 63 fromwire_nxt(ARGS_FROMWIRE) { 64 isc_region_t sr; 65 dns_name_t name; 66 67 REQUIRE(type == dns_rdatatype_nxt); 68 69 UNUSED(type); 70 UNUSED(rdclass); 71 72 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE); 73 74 dns_name_init(&name, NULL); 75 RETERR(dns_name_fromwire(&name, source, dctx, options, target)); 76 77 isc_buffer_activeregion(source, &sr); 78 if (sr.length > 0 && (sr.base[0] & 0x80) == 0 && 79 ((sr.length > 16) || sr.base[sr.length - 1] == 0)) 80 return (DNS_R_BADBITMAP); 81 RETERR(isc_mem_tobuffer(target, sr.base, sr.length)); 82 isc_buffer_forward(source, sr.length); 83 return (ISC_R_SUCCESS); 84 } 85 86 static inline isc_result_t 87 towire_nxt(ARGS_TOWIRE) { 88 isc_region_t sr; 89 dns_name_t name; 90 dns_offsets_t offsets; 91 92 REQUIRE(rdata->type == dns_rdatatype_nxt); 93 REQUIRE(rdata->length != 0); 94 95 dns_compress_setmethods(cctx, DNS_COMPRESS_NONE); 96 dns_name_init(&name, offsets); 97 dns_rdata_toregion(rdata, &sr); 98 dns_name_fromregion(&name, &sr); 99 isc_region_consume(&sr, name_length(&name)); 100 RETERR(dns_name_towire(&name, cctx, target)); 101 102 return (isc_mem_tobuffer(target, sr.base, sr.length)); 103 } 104 105 #endif /* RDATA_GENERIC_NXT_30_C */ 106