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: mx_15.c,v 1.14 2020/09/14 08:40:43 florian Exp $ */
18
19 /* reviewed: Wed Mar 15 18:05:46 PST 2000 by brister */
20
21 #ifndef RDATA_GENERIC_MX_15_C
22 #define RDATA_GENERIC_MX_15_C
23
24 #include <string.h>
25
26 static inline isc_result_t
totext_mx(ARGS_TOTEXT)27 totext_mx(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_mx);
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
47 RETERR(isc_str_tobuffer(" ", target));
48
49 dns_name_fromregion(&name, ®ion);
50 sub = name_prefix(&name, tctx->origin, &prefix);
51 return (dns_name_totext(&prefix, sub, target));
52 }
53
54 static inline isc_result_t
fromwire_mx(ARGS_FROMWIRE)55 fromwire_mx(ARGS_FROMWIRE) {
56 dns_name_t name;
57 isc_region_t sregion;
58
59 REQUIRE(type == dns_rdatatype_mx);
60
61 UNUSED(type);
62 UNUSED(rdclass);
63
64 dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);
65
66 dns_name_init(&name, NULL);
67
68 isc_buffer_activeregion(source, &sregion);
69 if (sregion.length < 2)
70 return (ISC_R_UNEXPECTEDEND);
71 RETERR(isc_mem_tobuffer(target, sregion.base, 2));
72 isc_buffer_forward(source, 2);
73 return (dns_name_fromwire(&name, source, dctx, options, target));
74 }
75
76 static inline isc_result_t
towire_mx(ARGS_TOWIRE)77 towire_mx(ARGS_TOWIRE) {
78 dns_name_t name;
79 dns_offsets_t offsets;
80 isc_region_t region;
81
82 REQUIRE(rdata->type == dns_rdatatype_mx);
83 REQUIRE(rdata->length != 0);
84
85 dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);
86
87 dns_rdata_toregion(rdata, ®ion);
88 RETERR(isc_mem_tobuffer(target, region.base, 2));
89 isc_region_consume(®ion, 2);
90
91 dns_name_init(&name, offsets);
92 dns_name_fromregion(&name, ®ion);
93
94 return (dns_name_towire(&name, cctx, target));
95 }
96
97 #endif /* RDATA_GENERIC_MX_15_C */
98