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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 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 "bus-internal.h" | |
ac89bf1d LP |
23 | |
24 | bool object_path_is_valid(const char *p) { | |
25 | const char *q; | |
26 | bool slash; | |
27 | ||
28 | if (!p) | |
29 | return false; | |
30 | ||
31 | if (p[0] != '/') | |
32 | return false; | |
33 | ||
34 | if (p[1] == 0) | |
35 | return true; | |
36 | ||
37 | for (slash = true, q = p+1; *q; q++) | |
38 | if (*q == '/') { | |
39 | if (slash) | |
40 | return false; | |
41 | ||
42 | slash = true; | |
43 | } else { | |
44 | bool good; | |
45 | ||
46 | good = | |
47 | (*q >= 'a' && *q <= 'z') || | |
48 | (*q >= 'A' && *q <= 'Z') || | |
49 | (*q >= '0' && *q <= '9') || | |
50 | *q == '_'; | |
51 | ||
52 | if (!good) | |
53 | return false; | |
54 | ||
55 | slash = false; | |
56 | } | |
57 | ||
58 | if (slash) | |
59 | return false; | |
60 | ||
61 | return true; | |
62 | } | |
6693860f | 63 | |
29ddb38f LP |
64 | char* object_path_startswith(const char *a, const char *b) { |
65 | const char *p; | |
66 | ||
67 | if (!object_path_is_valid(a) || | |
68 | !object_path_is_valid(b)) | |
69 | return NULL; | |
70 | ||
71 | if (streq(b, "/")) | |
72 | return (char*) a + 1; | |
73 | ||
74 | p = startswith(a, b); | |
75 | if (!p) | |
76 | return NULL; | |
77 | ||
78 | if (*p == 0) | |
79 | return (char*) p; | |
80 | ||
81 | if (*p == '/') | |
82 | return (char*) p + 1; | |
83 | ||
84 | return NULL; | |
85 | } | |
86 | ||
6693860f LP |
87 | bool interface_name_is_valid(const char *p) { |
88 | const char *q; | |
f5f6e41a | 89 | bool dot, found_dot = false; |
6693860f LP |
90 | |
91 | if (isempty(p)) | |
92 | return false; | |
93 | ||
94 | for (dot = true, q = p; *q; q++) | |
95 | if (*q == '.') { | |
96 | if (dot) | |
97 | return false; | |
98 | ||
99 | found_dot = dot = true; | |
100 | } else { | |
101 | bool good; | |
102 | ||
103 | good = | |
104 | (*q >= 'a' && *q <= 'z') || | |
105 | (*q >= 'A' && *q <= 'Z') || | |
106 | (!dot && *q >= '0' && *q <= '9') || | |
107 | *q == '_'; | |
108 | ||
109 | if (!good) | |
110 | return false; | |
111 | ||
112 | dot = false; | |
113 | } | |
114 | ||
115 | if (q - p > 255) | |
116 | return false; | |
117 | ||
118 | if (dot) | |
119 | return false; | |
120 | ||
121 | if (!found_dot) | |
122 | return false; | |
123 | ||
124 | return true; | |
125 | } | |
126 | ||
127 | bool service_name_is_valid(const char *p) { | |
128 | const char *q; | |
f5f6e41a | 129 | bool dot, found_dot = false, unique; |
6693860f LP |
130 | |
131 | if (isempty(p)) | |
132 | return false; | |
133 | ||
134 | unique = p[0] == ':'; | |
135 | ||
136 | for (dot = true, q = unique ? p+1 : p; *q; q++) | |
137 | if (*q == '.') { | |
138 | if (dot) | |
139 | return false; | |
140 | ||
141 | found_dot = dot = true; | |
142 | } else { | |
143 | bool good; | |
144 | ||
145 | good = | |
146 | (*q >= 'a' && *q <= 'z') || | |
147 | (*q >= 'A' && *q <= 'Z') || | |
148 | ((!dot || unique) && *q >= '0' && *q <= '9') || | |
149 | *q == '_' || *q == '-'; | |
150 | ||
151 | if (!good) | |
152 | return false; | |
153 | ||
154 | dot = false; | |
155 | } | |
156 | ||
157 | if (q - p > 255) | |
158 | return false; | |
159 | ||
160 | if (dot) | |
161 | return false; | |
162 | ||
163 | if (!found_dot) | |
164 | return false; | |
165 | ||
166 | return true; | |
6693860f LP |
167 | } |
168 | ||
f5d8989c LP |
169 | char* service_name_startswith(const char *a, const char *b) { |
170 | const char *p; | |
171 | ||
172 | if (!service_name_is_valid(a) || | |
173 | !service_name_is_valid(b)) | |
174 | return NULL; | |
175 | ||
176 | p = startswith(a, b); | |
177 | if (!p) | |
178 | return NULL; | |
179 | ||
180 | if (*p == 0) | |
181 | return (char*) p; | |
182 | ||
183 | if (*p == '.') | |
184 | return (char*) p + 1; | |
185 | ||
186 | return NULL; | |
187 | } | |
188 | ||
6693860f LP |
189 | bool member_name_is_valid(const char *p) { |
190 | const char *q; | |
191 | ||
192 | if (isempty(p)) | |
193 | return false; | |
194 | ||
195 | for (q = p; *q; q++) { | |
196 | bool good; | |
197 | ||
198 | good = | |
199 | (*q >= 'a' && *q <= 'z') || | |
200 | (*q >= 'A' && *q <= 'Z') || | |
201 | (*q >= '0' && *q <= '9') || | |
202 | *q == '_'; | |
203 | ||
204 | if (!good) | |
205 | return false; | |
206 | } | |
207 | ||
208 | if (q - p > 255) | |
209 | return false; | |
210 | ||
211 | return true; | |
212 | } | |
392d5b37 LP |
213 | |
214 | static bool complex_pattern_check(char c, const char *a, const char *b) { | |
215 | bool separator = false; | |
216 | ||
42c5aaf3 LP |
217 | if (!a && !b) |
218 | return true; | |
219 | ||
220 | if (!a || !b) | |
221 | return false; | |
222 | ||
392d5b37 LP |
223 | for (;;) { |
224 | if (*a != *b) | |
225 | return (separator && (*a == 0 || *b == 0)) || | |
226 | (*a == 0 && *b == c && b[1] == 0) || | |
227 | (*b == 0 && *a == c && a[1] == 0); | |
228 | ||
229 | if (*a == 0) | |
230 | return true; | |
231 | ||
232 | separator = *a == c; | |
233 | ||
234 | a++, b++; | |
235 | } | |
236 | } | |
237 | ||
238 | bool namespace_complex_pattern(const char *pattern, const char *value) { | |
239 | return complex_pattern_check('.', pattern, value); | |
240 | } | |
241 | ||
242 | bool path_complex_pattern(const char *pattern, const char *value) { | |
243 | return complex_pattern_check('/', pattern, value); | |
244 | } | |
245 | ||
246 | static bool simple_pattern_check(char c, const char *a, const char *b) { | |
42c5aaf3 LP |
247 | |
248 | if (!a && !b) | |
249 | return true; | |
250 | ||
251 | if (!a || !b) | |
252 | return false; | |
253 | ||
392d5b37 LP |
254 | for (;;) { |
255 | if (*a != *b) | |
256 | return *a == 0 && *b == c; | |
257 | ||
258 | if (*a == 0) | |
259 | return true; | |
260 | ||
261 | a++, b++; | |
262 | } | |
263 | } | |
264 | ||
265 | bool namespace_simple_pattern(const char *pattern, const char *value) { | |
266 | return simple_pattern_check('.', pattern, value); | |
267 | } | |
268 | ||
269 | bool path_simple_pattern(const char *pattern, const char *value) { | |
270 | return simple_pattern_check('/', pattern, value); | |
271 | } | |
272 | ||
273 | int bus_message_type_from_string(const char *s, uint8_t *u) { | |
274 | if (streq(s, "signal")) | |
40ca29a1 | 275 | *u = SD_BUS_MESSAGE_SIGNAL; |
392d5b37 | 276 | else if (streq(s, "method_call")) |
40ca29a1 | 277 | *u = SD_BUS_MESSAGE_METHOD_CALL; |
392d5b37 | 278 | else if (streq(s, "error")) |
40ca29a1 | 279 | *u = SD_BUS_MESSAGE_METHOD_ERROR; |
392d5b37 | 280 | else if (streq(s, "method_return")) |
40ca29a1 | 281 | *u = SD_BUS_MESSAGE_METHOD_RETURN; |
392d5b37 LP |
282 | else |
283 | return -EINVAL; | |
284 | ||
285 | return 0; | |
286 | } | |
a56f19c4 LP |
287 | |
288 | const char *bus_message_type_to_string(uint8_t u) { | |
40ca29a1 | 289 | if (u == SD_BUS_MESSAGE_SIGNAL) |
a56f19c4 | 290 | return "signal"; |
40ca29a1 | 291 | else if (u == SD_BUS_MESSAGE_METHOD_CALL) |
a56f19c4 | 292 | return "method_call"; |
40ca29a1 | 293 | else if (u == SD_BUS_MESSAGE_METHOD_ERROR) |
a56f19c4 | 294 | return "error"; |
40ca29a1 | 295 | else if (u == SD_BUS_MESSAGE_METHOD_RETURN) |
a56f19c4 LP |
296 | return "method_return"; |
297 | else | |
298 | return NULL; | |
299 | } | |
0f8bd8de LP |
300 | |
301 | char *bus_address_escape(const char *v) { | |
302 | const char *a; | |
303 | char *r, *b; | |
304 | ||
305 | r = new(char, strlen(v)*3+1); | |
306 | if (!r) | |
307 | return NULL; | |
308 | ||
309 | for (a = v, b = r; *a; a++) { | |
310 | ||
311 | if ((*a >= '0' && *a <= '9') || | |
312 | (*a >= 'a' && *a <= 'z') || | |
313 | (*a >= 'A' && *a <= 'Z') || | |
314 | strchr("_-/.", *a)) | |
315 | *(b++) = *a; | |
316 | else { | |
317 | *(b++) = '%'; | |
318 | *(b++) = hexchar(*a >> 4); | |
319 | *(b++) = hexchar(*a & 0xF); | |
320 | } | |
321 | } | |
322 | ||
323 | *b = 0; | |
324 | return r; | |
325 | } |