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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include "resolved-dns-answer.h" | |
23 | ||
24 | DnsAnswer *dns_answer_new(unsigned n) { | |
25 | DnsAnswer *a; | |
26 | ||
27 | assert(n > 0); | |
28 | ||
29 | a = malloc0(offsetof(DnsAnswer, rrs) + sizeof(DnsResourceRecord*) * n); | |
30 | if (!a) | |
31 | return NULL; | |
32 | ||
33 | a->n_ref = 1; | |
34 | a->n_allocated = n; | |
35 | ||
36 | return a; | |
37 | } | |
38 | ||
39 | DnsAnswer *dns_answer_ref(DnsAnswer *a) { | |
40 | if (!a) | |
41 | return NULL; | |
42 | ||
43 | assert(a->n_ref > 0); | |
44 | a->n_ref++; | |
45 | return a; | |
46 | } | |
47 | ||
48 | DnsAnswer *dns_answer_unref(DnsAnswer *a) { | |
49 | if (!a) | |
50 | return NULL; | |
51 | ||
52 | assert(a->n_ref > 0); | |
53 | ||
54 | if (a->n_ref == 1) { | |
55 | unsigned i; | |
56 | ||
57 | for (i = 0; i < a->n_rrs; i++) | |
58 | dns_resource_record_unref(a->rrs[i]); | |
59 | ||
60 | free(a); | |
61 | } else | |
62 | a->n_ref--; | |
63 | ||
64 | return NULL; | |
65 | } | |
66 | ||
67 | int dns_answer_add(DnsAnswer *a, DnsResourceRecord *rr) { | |
68 | assert(a); | |
69 | assert(rr); | |
70 | ||
71 | if (a->n_rrs >= a->n_allocated) | |
72 | return -ENOSPC; | |
73 | ||
74 | a->rrs[a->n_rrs++] = dns_resource_record_ref(rr); | |
75 | return 0; | |
76 | } |