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 1.13 2020/09/14 08:40:43 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 static inline isc_result_t 26 totext_ch_a(ARGS_TOTEXT) { 27 isc_region_t region; 28 dns_name_t name; 29 dns_name_t prefix; 30 int sub; 31 char buf[sizeof("0177777")]; 32 uint16_t addr; 33 34 REQUIRE(rdata->type == dns_rdatatype_a); 35 REQUIRE(rdata->rdclass == dns_rdataclass_ch); /* 3 */ 36 REQUIRE(rdata->length != 0); 37 38 dns_name_init(&name, NULL); 39 dns_name_init(&prefix, NULL); 40 41 dns_rdata_toregion(rdata, ®ion); 42 dns_name_fromregion(&name, ®ion); 43 isc_region_consume(®ion, name_length(&name)); 44 addr = uint16_fromregion(®ion); 45 46 sub = name_prefix(&name, tctx->origin, &prefix); 47 RETERR(dns_name_totext(&prefix, sub, target)); 48 49 snprintf(buf, sizeof(buf), "%o", addr); /* note octal */ 50 RETERR(isc_str_tobuffer(" ", target)); 51 return (isc_str_tobuffer(buf, target)); 52 } 53 54 static inline isc_result_t 55 fromwire_ch_a(ARGS_FROMWIRE) { 56 isc_region_t sregion; 57 isc_region_t tregion; 58 dns_name_t name; 59 60 REQUIRE(type == dns_rdatatype_a); 61 REQUIRE(rdclass == dns_rdataclass_ch); 62 63 UNUSED(type); 64 UNUSED(rdclass); 65 66 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); 67 68 dns_name_init(&name, NULL); 69 70 RETERR(dns_name_fromwire(&name, source, dctx, options, target)); 71 72 isc_buffer_activeregion(source, &sregion); 73 isc_buffer_availableregion(target, &tregion); 74 if (sregion.length < 2) 75 return (ISC_R_UNEXPECTEDEND); 76 if (tregion.length < 2) 77 return (ISC_R_NOSPACE); 78 79 memmove(tregion.base, sregion.base, 2); 80 isc_buffer_forward(source, 2); 81 isc_buffer_add(target, 2); 82 83 return (ISC_R_SUCCESS); 84 } 85 86 static inline isc_result_t 87 towire_ch_a(ARGS_TOWIRE) { 88 dns_name_t name; 89 dns_offsets_t offsets; 90 isc_region_t sregion; 91 isc_region_t tregion; 92 93 REQUIRE(rdata->type == dns_rdatatype_a); 94 REQUIRE(rdata->rdclass == dns_rdataclass_ch); 95 REQUIRE(rdata->length != 0); 96 97 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); 98 99 dns_name_init(&name, offsets); 100 101 dns_rdata_toregion(rdata, &sregion); 102 103 dns_name_fromregion(&name, &sregion); 104 isc_region_consume(&sregion, name_length(&name)); 105 RETERR(dns_name_towire(&name, cctx, target)); 106 107 isc_buffer_availableregion(target, &tregion); 108 if (tregion.length < 2) 109 return (ISC_R_NOSPACE); 110 111 memmove(tregion.base, sregion.base, 2); 112 isc_buffer_add(target, 2); 113 return (ISC_R_SUCCESS); 114 } 115 116 #endif /* RDATA_CH_3_A_1_C */ 117