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 1.13 2020/02/26 18:47:59 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 #include <isc/net.h> 29 30 static inline isc_result_t 31 totext_in_wks(ARGS_TOTEXT) { 32 isc_region_t sr; 33 unsigned short proto; 34 char buf[sizeof("65535")]; 35 unsigned int i, j; 36 37 UNUSED(tctx); 38 39 REQUIRE(rdata->type == dns_rdatatype_wks); 40 REQUIRE(rdata->rdclass == dns_rdataclass_in); 41 REQUIRE(rdata->length >= 5); 42 43 dns_rdata_toregion(rdata, &sr); 44 RETERR(inet_totext(AF_INET, &sr, target)); 45 isc_region_consume(&sr, 4); 46 47 proto = uint8_fromregion(&sr); 48 snprintf(buf, sizeof(buf), "%u", proto); 49 RETERR(isc_str_tobuffer(" ", target)); 50 RETERR(isc_str_tobuffer(buf, target)); 51 isc_region_consume(&sr, 1); 52 53 INSIST(sr.length <= 8*1024); 54 for (i = 0; i < sr.length; i++) { 55 if (sr.base[i] != 0) 56 for (j = 0; j < 8; j++) 57 if ((sr.base[i] & (0x80 >> j)) != 0) { 58 snprintf(buf, sizeof(buf), 59 "%u", i * 8 + j); 60 RETERR(isc_str_tobuffer(" ", target)); 61 RETERR(isc_str_tobuffer(buf, target)); 62 } 63 } 64 65 return (ISC_R_SUCCESS); 66 } 67 68 static inline isc_result_t 69 fromwire_in_wks(ARGS_FROMWIRE) { 70 isc_region_t sr; 71 isc_region_t tr; 72 73 REQUIRE(type == dns_rdatatype_wks); 74 REQUIRE(rdclass == dns_rdataclass_in); 75 76 UNUSED(type); 77 UNUSED(dctx); 78 UNUSED(options); 79 UNUSED(rdclass); 80 81 isc_buffer_activeregion(source, &sr); 82 isc_buffer_availableregion(target, &tr); 83 84 if (sr.length < 5) 85 return (ISC_R_UNEXPECTEDEND); 86 if (sr.length > 8 * 1024 + 5) 87 return (DNS_R_EXTRADATA); 88 if (tr.length < sr.length) 89 return (ISC_R_NOSPACE); 90 91 memmove(tr.base, sr.base, sr.length); 92 isc_buffer_add(target, sr.length); 93 isc_buffer_forward(source, sr.length); 94 95 return (ISC_R_SUCCESS); 96 } 97 98 static inline isc_result_t 99 towire_in_wks(ARGS_TOWIRE) { 100 isc_region_t sr; 101 102 UNUSED(cctx); 103 104 REQUIRE(rdata->type == dns_rdatatype_wks); 105 REQUIRE(rdata->rdclass == dns_rdataclass_in); 106 REQUIRE(rdata->length != 0); 107 108 dns_rdata_toregion(rdata, &sr); 109 return (isc_mem_tobuffer(target, sr.base, sr.length)); 110 } 111 112 #endif /* RDATA_IN_1_WKS_11_C */ 113