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: a_1.c,v 1.11 2020/02/26 18:47:58 florian Exp $ */ 18 19 /* by Bjorn.Victor@it.uu.se, 2005-05-07 */ 20 /* Based on generic/soa_6.c and generic/mx_15.c */ 21 22 #ifndef RDATA_CH_3_A_1_C 23 #define RDATA_CH_3_A_1_C 24 25 #include <isc/net.h> 26 27 static inline isc_result_t 28 totext_ch_a(ARGS_TOTEXT) { 29 isc_region_t region; 30 dns_name_t name; 31 dns_name_t prefix; 32 isc_boolean_t sub; 33 char buf[sizeof("0177777")]; 34 uint16_t addr; 35 36 REQUIRE(rdata->type == dns_rdatatype_a); 37 REQUIRE(rdata->rdclass == dns_rdataclass_ch); /* 3 */ 38 REQUIRE(rdata->length != 0); 39 40 dns_name_init(&name, NULL); 41 dns_name_init(&prefix, NULL); 42 43 dns_rdata_toregion(rdata, ®ion); 44 dns_name_fromregion(&name, ®ion); 45 isc_region_consume(®ion, name_length(&name)); 46 addr = uint16_fromregion(®ion); 47 48 sub = name_prefix(&name, tctx->origin, &prefix); 49 RETERR(dns_name_totext(&prefix, sub, target)); 50 51 snprintf(buf, sizeof(buf), "%o", addr); /* note octal */ 52 RETERR(isc_str_tobuffer(" ", target)); 53 return (isc_str_tobuffer(buf, target)); 54 } 55 56 static inline isc_result_t 57 fromwire_ch_a(ARGS_FROMWIRE) { 58 isc_region_t sregion; 59 isc_region_t tregion; 60 dns_name_t name; 61 62 REQUIRE(type == dns_rdatatype_a); 63 REQUIRE(rdclass == dns_rdataclass_ch); 64 65 UNUSED(type); 66 UNUSED(rdclass); 67 68 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); 69 70 dns_name_init(&name, NULL); 71 72 RETERR(dns_name_fromwire(&name, source, dctx, options, target)); 73 74 isc_buffer_activeregion(source, &sregion); 75 isc_buffer_availableregion(target, &tregion); 76 if (sregion.length < 2) 77 return (ISC_R_UNEXPECTEDEND); 78 if (tregion.length < 2) 79 return (ISC_R_NOSPACE); 80 81 memmove(tregion.base, sregion.base, 2); 82 isc_buffer_forward(source, 2); 83 isc_buffer_add(target, 2); 84 85 return (ISC_R_SUCCESS); 86 } 87 88 static inline isc_result_t 89 towire_ch_a(ARGS_TOWIRE) { 90 dns_name_t name; 91 dns_offsets_t offsets; 92 isc_region_t sregion; 93 isc_region_t tregion; 94 95 REQUIRE(rdata->type == dns_rdatatype_a); 96 REQUIRE(rdata->rdclass == dns_rdataclass_ch); 97 REQUIRE(rdata->length != 0); 98 99 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); 100 101 dns_name_init(&name, offsets); 102 103 dns_rdata_toregion(rdata, &sregion); 104 105 dns_name_fromregion(&name, &sregion); 106 isc_region_consume(&sregion, name_length(&name)); 107 RETERR(dns_name_towire(&name, cctx, target)); 108 109 isc_buffer_availableregion(target, &tregion); 110 if (tregion.length < 2) 111 return (ISC_R_NOSPACE); 112 113 memmove(tregion.base, sregion.base, 2); 114 isc_buffer_add(target, 2); 115 return (ISC_R_SUCCESS); 116 } 117 118 #endif /* RDATA_CH_3_A_1_C */ 119