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: wks_11.c,v 1.14 2020/09/14 08:39:12 florian Exp $ */ 18 19 /* Reviewed: Fri Mar 17 15:01:49 PST 2000 by explorer */ 20 21 #ifndef RDATA_IN_1_WKS_11_C 22 #define RDATA_IN_1_WKS_11_C 23 24 #include <netdb.h> 25 #include <limits.h> 26 #include <stdlib.h> 27 28 static inline isc_result_t 29 totext_in_wks(ARGS_TOTEXT) { 30 isc_region_t sr; 31 unsigned short proto; 32 char buf[sizeof("65535")]; 33 unsigned int i, j; 34 35 UNUSED(tctx); 36 37 REQUIRE(rdata->type == dns_rdatatype_wks); 38 REQUIRE(rdata->rdclass == dns_rdataclass_in); 39 REQUIRE(rdata->length >= 5); 40 41 dns_rdata_toregion(rdata, &sr); 42 RETERR(inet_totext(AF_INET, &sr, target)); 43 isc_region_consume(&sr, 4); 44 45 proto = uint8_fromregion(&sr); 46 snprintf(buf, sizeof(buf), "%u", proto); 47 RETERR(isc_str_tobuffer(" ", target)); 48 RETERR(isc_str_tobuffer(buf, target)); 49 isc_region_consume(&sr, 1); 50 51 INSIST(sr.length <= 8*1024); 52 for (i = 0; i < sr.length; i++) { 53 if (sr.base[i] != 0) 54 for (j = 0; j < 8; j++) 55 if ((sr.base[i] & (0x80 >> j)) != 0) { 56 snprintf(buf, sizeof(buf), 57 "%u", i * 8 + j); 58 RETERR(isc_str_tobuffer(" ", target)); 59 RETERR(isc_str_tobuffer(buf, target)); 60 } 61 } 62 63 return (ISC_R_SUCCESS); 64 } 65 66 static inline isc_result_t 67 fromwire_in_wks(ARGS_FROMWIRE) { 68 isc_region_t sr; 69 isc_region_t tr; 70 71 REQUIRE(type == dns_rdatatype_wks); 72 REQUIRE(rdclass == dns_rdataclass_in); 73 74 UNUSED(type); 75 UNUSED(dctx); 76 UNUSED(options); 77 UNUSED(rdclass); 78 79 isc_buffer_activeregion(source, &sr); 80 isc_buffer_availableregion(target, &tr); 81 82 if (sr.length < 5) 83 return (ISC_R_UNEXPECTEDEND); 84 if (sr.length > 8 * 1024 + 5) 85 return (DNS_R_EXTRADATA); 86 if (tr.length < sr.length) 87 return (ISC_R_NOSPACE); 88 89 memmove(tr.base, sr.base, sr.length); 90 isc_buffer_add(target, sr.length); 91 isc_buffer_forward(source, sr.length); 92 93 return (ISC_R_SUCCESS); 94 } 95 96 static inline isc_result_t 97 towire_in_wks(ARGS_TOWIRE) { 98 isc_region_t sr; 99 100 UNUSED(cctx); 101 102 REQUIRE(rdata->type == dns_rdatatype_wks); 103 REQUIRE(rdata->rdclass == dns_rdataclass_in); 104 REQUIRE(rdata->length != 0); 105 106 dns_rdata_toregion(rdata, &sr); 107 return (isc_mem_tobuffer(target, sr.base, sr.length)); 108 } 109 110 #endif /* RDATA_IN_1_WKS_11_C */ 111