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: rt_21.c,v 1.12 2020/09/14 08:40:43 florian Exp $ */
18
19 /* reviewed: Thu Mar 16 15:02:31 PST 2000 by brister */
20
21 /* RFC1183 */
22
23 #ifndef RDATA_GENERIC_RT_21_C
24 #define RDATA_GENERIC_RT_21_C
25
26 static inline isc_result_t
totext_rt(ARGS_TOTEXT)27 totext_rt(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_rt);
36 REQUIRE(rdata->length != 0);
37
38 dns_name_init(&name, NULL);
39 dns_name_init(&prefix, NULL);
40
41 dns_rdata_toregion(rdata, ®ion);
42 num = uint16_fromregion(®ion);
43 isc_region_consume(®ion, 2);
44 snprintf(buf, sizeof(buf), "%u", num);
45 RETERR(isc_str_tobuffer(buf, target));
46 RETERR(isc_str_tobuffer(" ", target));
47 dns_name_fromregion(&name, ®ion);
48 sub = name_prefix(&name, tctx->origin, &prefix);
49 return (dns_name_totext(&prefix, sub, target));
50 }
51
52 static inline isc_result_t
fromwire_rt(ARGS_FROMWIRE)53 fromwire_rt(ARGS_FROMWIRE) {
54 dns_name_t name;
55 isc_region_t sregion;
56 isc_region_t tregion;
57
58 REQUIRE(type == dns_rdatatype_rt);
59
60 UNUSED(type);
61 UNUSED(rdclass);
62
63 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
64
65 dns_name_init(&name, NULL);
66
67 isc_buffer_activeregion(source, &sregion);
68 isc_buffer_availableregion(target, &tregion);
69 if (tregion.length < 2)
70 return (ISC_R_NOSPACE);
71 if (sregion.length < 2)
72 return (ISC_R_UNEXPECTEDEND);
73 memmove(tregion.base, sregion.base, 2);
74 isc_buffer_forward(source, 2);
75 isc_buffer_add(target, 2);
76 return (dns_name_fromwire(&name, source, dctx, options, target));
77 }
78
79 static inline isc_result_t
towire_rt(ARGS_TOWIRE)80 towire_rt(ARGS_TOWIRE) {
81 dns_name_t name;
82 dns_offsets_t offsets;
83 isc_region_t region;
84 isc_region_t tr;
85
86 REQUIRE(rdata->type == dns_rdatatype_rt);
87 REQUIRE(rdata->length != 0);
88
89 dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
90 isc_buffer_availableregion(target, &tr);
91 dns_rdata_toregion(rdata, ®ion);
92 if (tr.length < 2)
93 return (ISC_R_NOSPACE);
94 memmove(tr.base, region.base, 2);
95 isc_region_consume(®ion, 2);
96 isc_buffer_add(target, 2);
97
98 dns_name_init(&name, offsets);
99 dns_name_fromregion(&name, ®ion);
100
101 return (dns_name_towire(&name, cctx, target));
102 }
103
104 #endif /* RDATA_GENERIC_RT_21_C */
105