]>
Commit | Line | Data |
---|---|---|
46aded9a MT |
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 | ||
2a30e4de MT |
17 | #include <arpa/inet.h> |
18 | #include <netinet/in.h> | |
46aded9a MT |
19 | #include <stdio.h> |
20 | #include <stdlib.h> | |
21 | #include <stddef.h> | |
22 | #include <stdarg.h> | |
23 | #include <unistd.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include <ctype.h> | |
27 | ||
28 | #include <loc/libloc.h> | |
9fc7f001 | 29 | #include <loc/private.h> |
46aded9a MT |
30 | |
31 | struct loc_ctx { | |
32 | int refcount; | |
33 | void (*log_fn)(struct loc_ctx* ctx, | |
34 | int priority, const char *file, int line, const char *fn, | |
35 | const char *format, va_list args); | |
36 | int log_priority; | |
37 | }; | |
38 | ||
39 | void loc_log(struct loc_ctx* ctx, | |
40 | int priority, const char* file, int line, const char* fn, | |
41 | const char* format, ...) { | |
42 | va_list args; | |
43 | ||
44 | va_start(args, format); | |
45 | ctx->log_fn(ctx, priority, file, line, fn, format, args); | |
46 | va_end(args); | |
47 | } | |
48 | ||
49 | static void log_stderr(struct loc_ctx* ctx, | |
50 | int priority, const char* file, int line, const char* fn, | |
51 | const char* format, va_list args) { | |
52 | fprintf(stderr, "libloc: %s: ", fn); | |
53 | vfprintf(stderr, format, args); | |
54 | } | |
55 | ||
56 | static int log_priority(const char* priority) { | |
57 | char *endptr; | |
58 | ||
59 | int prio = strtol(priority, &endptr, 10); | |
60 | ||
61 | if (endptr[0] == '\0' || isspace(endptr[0])) | |
62 | return prio; | |
63 | ||
64 | if (strncmp(priority, "err", 3) == 0) | |
65 | return LOG_ERR; | |
66 | ||
67 | if (strncmp(priority, "info", 4) == 0) | |
68 | return LOG_INFO; | |
69 | ||
70 | if (strncmp(priority, "debug", 5) == 0) | |
71 | return LOG_DEBUG; | |
72 | ||
73 | return 0; | |
74 | } | |
75 | ||
76 | LOC_EXPORT int loc_new(struct loc_ctx** ctx) { | |
77 | struct loc_ctx* c = calloc(1, sizeof(*c)); | |
78 | if (!c) | |
79 | return -ENOMEM; | |
80 | ||
81 | c->refcount = 1; | |
82 | c->log_fn = log_stderr; | |
83 | c->log_priority = LOG_ERR; | |
84 | ||
85 | const char* env = secure_getenv("LOC_LOG"); | |
86 | if (env) | |
87 | loc_set_log_priority(c, log_priority(env)); | |
88 | ||
89 | INFO(c, "ctx %p created\n", c); | |
90 | DEBUG(c, "log_priority=%d\n", c->log_priority); | |
91 | *ctx = c; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | LOC_EXPORT struct loc_ctx* loc_ref(struct loc_ctx* ctx) { | |
97 | if (!ctx) | |
98 | return NULL; | |
99 | ||
100 | ctx->refcount++; | |
101 | ||
102 | return ctx; | |
103 | } | |
104 | ||
105 | LOC_EXPORT struct loc_ctx* loc_unref(struct loc_ctx* ctx) { | |
106 | if (!ctx) | |
107 | return NULL; | |
108 | ||
109 | if (--ctx->refcount > 0) | |
110 | return NULL; | |
111 | ||
112 | INFO(ctx, "context %p released\n", ctx); | |
113 | free(ctx); | |
114 | ||
115 | return NULL; | |
116 | } | |
117 | ||
118 | LOC_EXPORT void loc_set_log_fn(struct loc_ctx* ctx, | |
119 | void (*log_fn)(struct loc_ctx* ctx, int priority, const char* file, | |
120 | int line, const char* fn, const char* format, va_list args)) { | |
121 | ctx->log_fn = log_fn; | |
122 | INFO(ctx, "custom logging function %p registered\n", log_fn); | |
123 | } | |
124 | ||
125 | LOC_EXPORT int loc_get_log_priority(struct loc_ctx* ctx) { | |
126 | return ctx->log_priority; | |
127 | } | |
128 | ||
129 | LOC_EXPORT void loc_set_log_priority(struct loc_ctx* ctx, int priority) { | |
130 | ctx->log_priority = priority; | |
131 | } | |
2601e83e | 132 | |
2a30e4de MT |
133 | LOC_EXPORT int loc_parse_address(struct loc_ctx* ctx, const char* string, struct in6_addr* address) { |
134 | DEBUG(ctx, "Paring IP address %s\n", string); | |
135 | ||
136 | // Try parsing this as an IPv6 address | |
137 | int r = inet_pton(AF_INET6, string, address); | |
138 | ||
139 | // If inet_pton returns one it has been successful | |
140 | if (r == 1) { | |
141 | DEBUG(ctx, "%s is an IPv6 address\n", string); | |
142 | return 0; | |
143 | } | |
144 | ||
145 | // Try parsing this as an IPv4 address | |
146 | struct in_addr ipv4_address; | |
147 | r = inet_pton(AF_INET, string, &ipv4_address); | |
148 | if (r == 1) { | |
149 | DEBUG(ctx, "%s is an IPv4 address\n", string); | |
150 | ||
151 | // Convert to IPv6-mapped address | |
152 | address->s6_addr32[0] = htonl(0x0000); | |
153 | address->s6_addr32[1] = htonl(0x0000); | |
154 | address->s6_addr32[2] = htonl(0xffff); | |
155 | address->s6_addr32[3] = ipv4_address.s_addr; | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | DEBUG(ctx, "%s is not an valid IP address\n", string); | |
161 | return 1; | |
162 | } |