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
totext_in_wks(ARGS_TOTEXT)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
fromwire_in_wks(ARGS_FROMWIRE)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
towire_in_wks(ARGS_TOWIRE)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