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1 | /* |
2 | libloc - A library to determine the location of someone on the Internet | |
3 | ||
4 | Copyright (C) 2017 IPFire Development Team <info@ipfire.org> | |
5 | ||
6 | This library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | This library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <arpa/inet.h> | |
18 | #include <errno.h> | |
19 | #include <stdint.h> | |
20 | #include <stdlib.h> | |
21 | ||
22 | #include <loc/libloc.h> | |
23 | #include <loc/format.h> | |
24 | ||
25 | #include "libloc-private.h" | |
26 | #include "as.h" | |
27 | #include "stringpool.h" | |
28 | ||
29 | struct loc_as { | |
30 | struct loc_ctx* ctx; | |
31 | int refcount; | |
32 | ||
33 | struct loc_stringpool* pool; | |
34 | ||
35 | uint32_t number; | |
36 | off_t name; | |
37 | }; | |
38 | ||
39 | LOC_EXPORT int loc_as_new(struct loc_ctx* ctx, struct loc_stringpool* pool, struct loc_as** as, uint32_t number) { | |
40 | struct loc_as* a = calloc(1, sizeof(*a)); | |
41 | if (!a) | |
42 | return -ENOMEM; | |
43 | ||
44 | a->ctx = loc_ref(ctx); | |
45 | a->refcount = 1; | |
46 | a->pool = loc_stringpool_ref(pool); | |
47 | ||
48 | a->number = number; | |
49 | ||
50 | DEBUG(a->ctx, "AS%u allocated at %p\n", a->number, a); | |
51 | *as = a; | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
56 | LOC_EXPORT struct loc_as* loc_as_ref(struct loc_as* as) { | |
57 | as->refcount++; | |
58 | ||
59 | return as; | |
60 | } | |
61 | ||
62 | static void loc_as_free(struct loc_as* as) { | |
63 | DEBUG(as->ctx, "Releasing AS%u %p\n", as->number, as); | |
64 | ||
65 | loc_stringpool_unref(as->pool); | |
66 | loc_unref(as->ctx); | |
67 | ||
68 | free(as); | |
69 | } | |
70 | ||
71 | LOC_EXPORT struct loc_as* loc_as_unref(struct loc_as* as) { | |
72 | if (--as->refcount > 0) | |
73 | return NULL; | |
74 | ||
75 | loc_as_free(as); | |
76 | ||
77 | return NULL; | |
78 | } | |
79 | ||
80 | LOC_EXPORT uint32_t loc_as_get_number(struct loc_as* as) { | |
81 | return as->number; | |
82 | } | |
83 | ||
84 | LOC_EXPORT const char* loc_as_get_name(struct loc_as* as) { | |
85 | return loc_stringpool_get(as->pool, as->name); | |
86 | } | |
87 | ||
88 | LOC_EXPORT int loc_as_set_name(struct loc_as* as, const char* name) { | |
89 | // Add the string to the string pool | |
90 | off_t offset = loc_stringpool_add(as->pool, name); | |
91 | if (offset < 0) | |
92 | return offset; | |
93 | ||
94 | as->name = offset; | |
95 | return 0; | |
96 | } | |
97 | ||
98 | LOC_EXPORT int loc_as_cmp(struct loc_as* as1, struct loc_as* as2) { | |
99 | if (as1->number > as2->number) | |
100 | return 1; | |
101 | ||
102 | if (as1->number < as2->number) | |
103 | return -1; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | int loc_as_new_from_database_v0(struct loc_ctx* ctx, struct loc_stringpool* pool, | |
109 | struct loc_as** as, const struct loc_database_as_v0* dbobj) { | |
110 | uint32_t number = ntohl(dbobj->number); | |
111 | ||
112 | int r = loc_as_new(ctx, pool, as, number); | |
113 | if (r) | |
114 | return r; | |
115 | ||
116 | (*as)->name = ntohl(dbobj->name); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | int loc_as_to_database_v0(struct loc_as* as, struct loc_database_as_v0* dbobj) { | |
122 | dbobj->number = htonl(as->number); | |
123 | dbobj->name = htonl(as->name); | |
124 | ||
125 | return 0; | |
126 | } |