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: mx_15.c,v 1.14 2020/09/14 08:40:43 florian Exp $ */ 18 19 /* reviewed: Wed Mar 15 18:05:46 PST 2000 by brister */ 20 21 #ifndef RDATA_GENERIC_MX_15_C 22 #define RDATA_GENERIC_MX_15_C 23 24 #include <string.h> 25 26 static inline isc_result_t 27 totext_mx(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_mx); 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 num = uint16_fromregion(®ion); 43 isc_region_consume(®ion, 2); 44 snprintf(buf, sizeof(buf), "%u", num); 45 RETERR(isc_str_tobuffer(buf, target)); 46 47 RETERR(isc_str_tobuffer(" ", target)); 48 49 dns_name_fromregion(&name, ®ion); 50 sub = name_prefix(&name, tctx->origin, &prefix); 51 return (dns_name_totext(&prefix, sub, target)); 52 } 53 54 static inline isc_result_t 55 fromwire_mx(ARGS_FROMWIRE) { 56 dns_name_t name; 57 isc_region_t sregion; 58 59 REQUIRE(type == dns_rdatatype_mx); 60 61 UNUSED(type); 62 UNUSED(rdclass); 63 64 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14); 65 66 dns_name_init(&name, NULL); 67 68 isc_buffer_activeregion(source, &sregion); 69 if (sregion.length < 2) 70 return (ISC_R_UNEXPECTEDEND); 71 RETERR(isc_mem_tobuffer(target, sregion.base, 2)); 72 isc_buffer_forward(source, 2); 73 return (dns_name_fromwire(&name, source, dctx, options, target)); 74 } 75 76 static inline isc_result_t 77 towire_mx(ARGS_TOWIRE) { 78 dns_name_t name; 79 dns_offsets_t offsets; 80 isc_region_t region; 81 82 REQUIRE(rdata->type == dns_rdatatype_mx); 83 REQUIRE(rdata->length != 0); 84 85 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14); 86 87 dns_rdata_toregion(rdata, ®ion); 88 RETERR(isc_mem_tobuffer(target, region.base, 2)); 89 isc_region_consume(®ion, 2); 90 91 dns_name_init(&name, offsets); 92 dns_name_fromregion(&name, ®ion); 93 94 return (dns_name_towire(&name, cctx, target)); 95 } 96 97 #endif /* RDATA_GENERIC_MX_15_C */ 98