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: px_26.c,v 1.13 2020/09/14 08:40:44 florian Exp $ */
18
19 /* Reviewed: Mon Mar 20 10:44:27 PST 2000 */
20
21 /* RFC2163 */
22
23 #ifndef RDATA_IN_1_PX_26_C
24 #define RDATA_IN_1_PX_26_C
25
26 static inline isc_result_t
totext_in_px(ARGS_TOTEXT)27 totext_in_px(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_px);
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 * Preference.
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 * MAP822.
54 */
55 dns_name_fromregion(&name, ®ion);
56 sub = name_prefix(&name, tctx->origin, &prefix);
57 isc_region_consume(®ion, name_length(&name));
58 RETERR(dns_name_totext(&prefix, sub, target));
59 RETERR(isc_str_tobuffer(" ", target));
60
61 /*
62 * MAPX400.
63 */
64 dns_name_fromregion(&name, ®ion);
65 sub = name_prefix(&name, tctx->origin, &prefix);
66 return(dns_name_totext(&prefix, sub, target));
67 }
68
69 static inline isc_result_t
fromwire_in_px(ARGS_FROMWIRE)70 fromwire_in_px(ARGS_FROMWIRE) {
71 dns_name_t name;
72 isc_region_t sregion;
73
74 REQUIRE(type == dns_rdatatype_px);
75 REQUIRE(rdclass == dns_rdataclass_in);
76
77 UNUSED(type);
78 UNUSED(rdclass);
79
80 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
81
82 dns_name_init(&name, NULL);
83
84 /*
85 * Preference.
86 */
87 isc_buffer_activeregion(source, &sregion);
88 if (sregion.length < 2)
89 return (ISC_R_UNEXPECTEDEND);
90 RETERR(isc_mem_tobuffer(target, sregion.base, 2));
91 isc_buffer_forward(source, 2);
92
93 /*
94 * MAP822.
95 */
96 RETERR(dns_name_fromwire(&name, source, dctx, options, target));
97
98 /*
99 * MAPX400.
100 */
101 return (dns_name_fromwire(&name, source, dctx, options, target));
102 }
103
104 static inline isc_result_t
towire_in_px(ARGS_TOWIRE)105 towire_in_px(ARGS_TOWIRE) {
106 dns_name_t name;
107 dns_offsets_t offsets;
108 isc_region_t region;
109
110 REQUIRE(rdata->type == dns_rdatatype_px);
111 REQUIRE(rdata->rdclass == dns_rdataclass_in);
112 REQUIRE(rdata->length != 0);
113
114 dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
115 /*
116 * Preference.
117 */
118 dns_rdata_toregion(rdata, ®ion);
119 RETERR(isc_mem_tobuffer(target, region.base, 2));
120 isc_region_consume(®ion, 2);
121
122 /*
123 * MAP822.
124 */
125 dns_name_init(&name, offsets);
126 dns_name_fromregion(&name, ®ion);
127 RETERR(dns_name_towire(&name, cctx, target));
128 isc_region_consume(®ion, name_length(&name));
129
130 /*
131 * MAPX400.
132 */
133 dns_name_init(&name, offsets);
134 dns_name_fromregion(&name, ®ion);
135 return (dns_name_towire(&name, cctx, target));
136 }
137
138 #endif /* RDATA_IN_1_PX_26_C */
139