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84a2f0c2 MT |
1 | /* |
2 | libloc - A library to determine the location of someone on the Internet | |
3 | ||
4 | Copyright (C) 2020 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 <errno.h> | |
18 | #include <stdlib.h> | |
19 | ||
20 | #include <loc/as.h> | |
21 | #include <loc/as-list.h> | |
22 | #include <loc/private.h> | |
23 | ||
24 | struct loc_as_list { | |
25 | struct loc_ctx* ctx; | |
26 | int refcount; | |
27 | ||
1a415f8c MT |
28 | struct loc_as** elements; |
29 | size_t elements_size; | |
30 | ||
84a2f0c2 | 31 | size_t size; |
84a2f0c2 MT |
32 | }; |
33 | ||
1a415f8c MT |
34 | static int loc_as_list_grow(struct loc_as_list* list, size_t size) { |
35 | DEBUG(list->ctx, "Growing AS list %p by %zu to %zu\n", | |
36 | list, size, list->elements_size + size); | |
37 | ||
38 | struct loc_as** elements = reallocarray(list->elements, | |
39 | list->elements_size + size, sizeof(*list->elements)); | |
40 | if (!elements) | |
41 | return -errno; | |
42 | ||
43 | list->elements = elements; | |
44 | list->elements_size += size; | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
84a2f0c2 MT |
49 | LOC_EXPORT int loc_as_list_new(struct loc_ctx* ctx, |
50 | struct loc_as_list** list) { | |
51 | struct loc_as_list* l = calloc(1, sizeof(*l)); | |
52 | if (!l) | |
53 | return -ENOMEM; | |
54 | ||
55 | l->ctx = loc_ref(ctx); | |
56 | l->refcount = 1; | |
57 | ||
84a2f0c2 MT |
58 | DEBUG(l->ctx, "AS list allocated at %p\n", l); |
59 | *list = l; | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | LOC_EXPORT struct loc_as_list* loc_as_list_ref(struct loc_as_list* list) { | |
65 | list->refcount++; | |
66 | ||
67 | return list; | |
68 | } | |
69 | ||
70 | static void loc_as_list_free(struct loc_as_list* list) { | |
71 | DEBUG(list->ctx, "Releasing AS list at %p\n", list); | |
72 | ||
73 | loc_as_list_clear(list); | |
74 | ||
75 | loc_unref(list->ctx); | |
76 | free(list); | |
77 | } | |
78 | ||
79 | LOC_EXPORT struct loc_as_list* loc_as_list_unref(struct loc_as_list* list) { | |
80 | if (!list) | |
81 | return NULL; | |
82 | ||
83 | if (--list->refcount > 0) | |
84 | return list; | |
85 | ||
86 | loc_as_list_free(list); | |
87 | return NULL; | |
88 | } | |
89 | ||
90 | LOC_EXPORT size_t loc_as_list_size(struct loc_as_list* list) { | |
91 | return list->size; | |
92 | } | |
93 | ||
94 | LOC_EXPORT int loc_as_list_empty(struct loc_as_list* list) { | |
95 | return list->size == 0; | |
96 | } | |
97 | ||
98 | LOC_EXPORT void loc_as_list_clear(struct loc_as_list* list) { | |
99 | for (unsigned int i = 0; i < list->size; i++) | |
1a415f8c | 100 | loc_as_unref(list->elements[i]); |
84a2f0c2 MT |
101 | } |
102 | ||
103 | LOC_EXPORT struct loc_as* loc_as_list_get(struct loc_as_list* list, size_t index) { | |
104 | // Check index | |
105 | if (index >= list->size) | |
106 | return NULL; | |
107 | ||
1a415f8c | 108 | return loc_as_ref(list->elements[index]); |
84a2f0c2 MT |
109 | } |
110 | ||
111 | LOC_EXPORT int loc_as_list_append( | |
112 | struct loc_as_list* list, struct loc_as* as) { | |
113 | if (loc_as_list_contains(list, as)) | |
114 | return 0; | |
115 | ||
116 | // Check if we have space left | |
1a415f8c MT |
117 | if (list->size >= list->elements_size) { |
118 | int r = loc_as_list_grow(list, 64); | |
119 | if (r) | |
120 | return r; | |
84a2f0c2 MT |
121 | } |
122 | ||
123 | DEBUG(list->ctx, "%p: Appending AS %p to list\n", list, as); | |
124 | ||
1a415f8c | 125 | list->elements[list->size++] = loc_as_ref(as); |
84a2f0c2 MT |
126 | |
127 | return 0; | |
128 | } | |
129 | ||
130 | LOC_EXPORT int loc_as_list_contains( | |
131 | struct loc_as_list* list, struct loc_as* as) { | |
132 | for (unsigned int i = 0; i < list->size; i++) { | |
1a415f8c | 133 | if (loc_as_cmp(as, list->elements[i]) == 0) |
84a2f0c2 MT |
134 | return 1; |
135 | } | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | LOC_EXPORT int loc_as_list_contains_number( | |
141 | struct loc_as_list* list, uint32_t number) { | |
142 | struct loc_as* as; | |
143 | ||
144 | int r = loc_as_new(list->ctx, &as, number); | |
145 | if (r) | |
146 | return -1; | |
147 | ||
148 | r = loc_as_list_contains(list, as); | |
149 | loc_as_unref(as); | |
150 | ||
151 | return r; | |
152 | } |