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: srv_33.c,v 1.13 2020/09/14 08:40:44 florian Exp $ */
18
19 /* Reviewed: Fri Mar 17 13:01:00 PST 2000 by bwelling */
20
21 /* RFC2782 */
22
23 #ifndef RDATA_IN_1_SRV_33_C
24 #define RDATA_IN_1_SRV_33_C
25
26 static inline isc_result_t
totext_in_srv(ARGS_TOTEXT)27 totext_in_srv(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_srv);
36 REQUIRE(rdata->rdclass == dns_rdataclass_in);
37 REQUIRE(rdata->length != 0);
38
39 dns_name_init(&name, NULL);
40 dns_name_init(&prefix, NULL);
41
42 /*
43 * Priority.
44 */
45 dns_rdata_toregion(rdata, ®ion);
46 num = uint16_fromregion(®ion);
47 isc_region_consume(®ion, 2);
48 snprintf(buf, sizeof buf, "%u", num);
49 RETERR(isc_str_tobuffer(buf, target));
50 RETERR(isc_str_tobuffer(" ", target));
51
52 /*
53 * Weight.
54 */
55 num = uint16_fromregion(®ion);
56 isc_region_consume(®ion, 2);
57 snprintf(buf, sizeof buf, "%u", num);
58 RETERR(isc_str_tobuffer(buf, target));
59 RETERR(isc_str_tobuffer(" ", target));
60
61 /*
62 * Port.
63 */
64 num = uint16_fromregion(®ion);
65 isc_region_consume(®ion, 2);
66 snprintf(buf, sizeof buf, "%u", num);
67 RETERR(isc_str_tobuffer(buf, target));
68 RETERR(isc_str_tobuffer(" ", target));
69
70 /*
71 * Target.
72 */
73 dns_name_fromregion(&name, ®ion);
74 sub = name_prefix(&name, tctx->origin, &prefix);
75 return (dns_name_totext(&prefix, sub, target));
76 }
77
78 static inline isc_result_t
fromwire_in_srv(ARGS_FROMWIRE)79 fromwire_in_srv(ARGS_FROMWIRE) {
80 dns_name_t name;
81 isc_region_t sr;
82
83 REQUIRE(type == dns_rdatatype_srv);
84 REQUIRE(rdclass == dns_rdataclass_in);
85
86 UNUSED(type);
87 UNUSED(rdclass);
88
89 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
90
91 dns_name_init(&name, NULL);
92
93 /*
94 * Priority, weight, port.
95 */
96 isc_buffer_activeregion(source, &sr);
97 if (sr.length < 6)
98 return (ISC_R_UNEXPECTEDEND);
99 RETERR(isc_mem_tobuffer(target, sr.base, 6));
100 isc_buffer_forward(source, 6);
101
102 /*
103 * Target.
104 */
105 return (dns_name_fromwire(&name, source, dctx, options, target));
106 }
107
108 static inline isc_result_t
towire_in_srv(ARGS_TOWIRE)109 towire_in_srv(ARGS_TOWIRE) {
110 dns_name_t name;
111 dns_offsets_t offsets;
112 isc_region_t sr;
113
114 REQUIRE(rdata->type == dns_rdatatype_srv);
115 REQUIRE(rdata->length != 0);
116
117 dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
118 /*
119 * Priority, weight, port.
120 */
121 dns_rdata_toregion(rdata, &sr);
122 RETERR(isc_mem_tobuffer(target, sr.base, 6));
123 isc_region_consume(&sr, 6);
124
125 /*
126 * Target.
127 */
128 dns_name_init(&name, offsets);
129 dns_name_fromregion(&name, &sr);
130 return (dns_name_towire(&name, cctx, target));
131 }
132
133 #endif /* RDATA_IN_1_SRV_33_C */
134