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: px_26.c,v 1.13 2020/09/14 08:40:44 florian Exp $ */ 18 19 /* Reviewed: Mon Mar 20 10:44:27 PST 2000 */ 20 21 /* RFC2163 */ 22 23 #ifndef RDATA_IN_1_PX_26_C 24 #define RDATA_IN_1_PX_26_C 25 26 static inline isc_result_t 27 totext_in_px(ARGS_TOTEXT) { 28 isc_region_t region; 29 dns_name_t name; 30 dns_name_t prefix; 31 int sub; 32 char buf[sizeof("64000")]; 33 unsigned short num; 34 35 REQUIRE(rdata->type == dns_rdatatype_px); 36 REQUIRE(rdata->rdclass == dns_rdataclass_in); 37 REQUIRE(rdata->length != 0); 38 39 dns_name_init(&name, NULL); 40 dns_name_init(&prefix, NULL); 41 42 /* 43 * Preference. 44 */ 45 dns_rdata_toregion(rdata, ®ion); 46 num = uint16_fromregion(®ion); 47 isc_region_consume(®ion, 2); 48 snprintf(buf, sizeof(buf), "%u", num); 49 RETERR(isc_str_tobuffer(buf, target)); 50 RETERR(isc_str_tobuffer(" ", target)); 51 52 /* 53 * MAP822. 54 */ 55 dns_name_fromregion(&name, ®ion); 56 sub = name_prefix(&name, tctx->origin, &prefix); 57 isc_region_consume(®ion, name_length(&name)); 58 RETERR(dns_name_totext(&prefix, sub, target)); 59 RETERR(isc_str_tobuffer(" ", target)); 60 61 /* 62 * MAPX400. 63 */ 64 dns_name_fromregion(&name, ®ion); 65 sub = name_prefix(&name, tctx->origin, &prefix); 66 return(dns_name_totext(&prefix, sub, target)); 67 } 68 69 static inline isc_result_t 70 fromwire_in_px(ARGS_FROMWIRE) { 71 dns_name_t name; 72 isc_region_t sregion; 73 74 REQUIRE(type == dns_rdatatype_px); 75 REQUIRE(rdclass == dns_rdataclass_in); 76 77 UNUSED(type); 78 UNUSED(rdclass); 79 80 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE); 81 82 dns_name_init(&name, NULL); 83 84 /* 85 * Preference. 86 */ 87 isc_buffer_activeregion(source, &sregion); 88 if (sregion.length < 2) 89 return (ISC_R_UNEXPECTEDEND); 90 RETERR(isc_mem_tobuffer(target, sregion.base, 2)); 91 isc_buffer_forward(source, 2); 92 93 /* 94 * MAP822. 95 */ 96 RETERR(dns_name_fromwire(&name, source, dctx, options, target)); 97 98 /* 99 * MAPX400. 100 */ 101 return (dns_name_fromwire(&name, source, dctx, options, target)); 102 } 103 104 static inline isc_result_t 105 towire_in_px(ARGS_TOWIRE) { 106 dns_name_t name; 107 dns_offsets_t offsets; 108 isc_region_t region; 109 110 REQUIRE(rdata->type == dns_rdatatype_px); 111 REQUIRE(rdata->rdclass == dns_rdataclass_in); 112 REQUIRE(rdata->length != 0); 113 114 dns_compress_setmethods(cctx, DNS_COMPRESS_NONE); 115 /* 116 * Preference. 117 */ 118 dns_rdata_toregion(rdata, ®ion); 119 RETERR(isc_mem_tobuffer(target, region.base, 2)); 120 isc_region_consume(®ion, 2); 121 122 /* 123 * MAP822. 124 */ 125 dns_name_init(&name, offsets); 126 dns_name_fromregion(&name, ®ion); 127 RETERR(dns_name_towire(&name, cctx, target)); 128 isc_region_consume(®ion, name_length(&name)); 129 130 /* 131 * MAPX400. 132 */ 133 dns_name_init(&name, offsets); 134 dns_name_fromregion(&name, ®ion); 135 return (dns_name_towire(&name, cctx, target)); 136 } 137 138 #endif /* RDATA_IN_1_PX_26_C */ 139