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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 LP |
63 | |
64 | bool interface_name_is_valid(const char *p) { | |
65 | const char *q; | |
66 | bool dot, found_dot; | |
67 | ||
68 | if (isempty(p)) | |
69 | return false; | |
70 | ||
71 | for (dot = true, q = p; *q; q++) | |
72 | if (*q == '.') { | |
73 | if (dot) | |
74 | return false; | |
75 | ||
76 | found_dot = dot = true; | |
77 | } else { | |
78 | bool good; | |
79 | ||
80 | good = | |
81 | (*q >= 'a' && *q <= 'z') || | |
82 | (*q >= 'A' && *q <= 'Z') || | |
83 | (!dot && *q >= '0' && *q <= '9') || | |
84 | *q == '_'; | |
85 | ||
86 | if (!good) | |
87 | return false; | |
88 | ||
89 | dot = false; | |
90 | } | |
91 | ||
92 | if (q - p > 255) | |
93 | return false; | |
94 | ||
95 | if (dot) | |
96 | return false; | |
97 | ||
98 | if (!found_dot) | |
99 | return false; | |
100 | ||
101 | return true; | |
102 | } | |
103 | ||
104 | bool service_name_is_valid(const char *p) { | |
105 | const char *q; | |
106 | bool dot, found_dot, unique; | |
107 | ||
108 | if (isempty(p)) | |
109 | return false; | |
110 | ||
111 | unique = p[0] == ':'; | |
112 | ||
113 | for (dot = true, q = unique ? p+1 : p; *q; q++) | |
114 | if (*q == '.') { | |
115 | if (dot) | |
116 | return false; | |
117 | ||
118 | found_dot = dot = true; | |
119 | } else { | |
120 | bool good; | |
121 | ||
122 | good = | |
123 | (*q >= 'a' && *q <= 'z') || | |
124 | (*q >= 'A' && *q <= 'Z') || | |
125 | ((!dot || unique) && *q >= '0' && *q <= '9') || | |
126 | *q == '_' || *q == '-'; | |
127 | ||
128 | if (!good) | |
129 | return false; | |
130 | ||
131 | dot = false; | |
132 | } | |
133 | ||
134 | if (q - p > 255) | |
135 | return false; | |
136 | ||
137 | if (dot) | |
138 | return false; | |
139 | ||
140 | if (!found_dot) | |
141 | return false; | |
142 | ||
143 | return true; | |
6693860f LP |
144 | } |
145 | ||
146 | bool member_name_is_valid(const char *p) { | |
147 | const char *q; | |
148 | ||
149 | if (isempty(p)) | |
150 | return false; | |
151 | ||
152 | for (q = p; *q; q++) { | |
153 | bool good; | |
154 | ||
155 | good = | |
156 | (*q >= 'a' && *q <= 'z') || | |
157 | (*q >= 'A' && *q <= 'Z') || | |
158 | (*q >= '0' && *q <= '9') || | |
159 | *q == '_'; | |
160 | ||
161 | if (!good) | |
162 | return false; | |
163 | } | |
164 | ||
165 | if (q - p > 255) | |
166 | return false; | |
167 | ||
168 | return true; | |
169 | } | |
392d5b37 LP |
170 | |
171 | static bool complex_pattern_check(char c, const char *a, const char *b) { | |
172 | bool separator = false; | |
173 | ||
42c5aaf3 LP |
174 | if (!a && !b) |
175 | return true; | |
176 | ||
177 | if (!a || !b) | |
178 | return false; | |
179 | ||
392d5b37 LP |
180 | for (;;) { |
181 | if (*a != *b) | |
182 | return (separator && (*a == 0 || *b == 0)) || | |
183 | (*a == 0 && *b == c && b[1] == 0) || | |
184 | (*b == 0 && *a == c && a[1] == 0); | |
185 | ||
186 | if (*a == 0) | |
187 | return true; | |
188 | ||
189 | separator = *a == c; | |
190 | ||
191 | a++, b++; | |
192 | } | |
193 | } | |
194 | ||
195 | bool namespace_complex_pattern(const char *pattern, const char *value) { | |
196 | return complex_pattern_check('.', pattern, value); | |
197 | } | |
198 | ||
199 | bool path_complex_pattern(const char *pattern, const char *value) { | |
200 | return complex_pattern_check('/', pattern, value); | |
201 | } | |
202 | ||
203 | static bool simple_pattern_check(char c, const char *a, const char *b) { | |
42c5aaf3 LP |
204 | |
205 | if (!a && !b) | |
206 | return true; | |
207 | ||
208 | if (!a || !b) | |
209 | return false; | |
210 | ||
392d5b37 LP |
211 | for (;;) { |
212 | if (*a != *b) | |
213 | return *a == 0 && *b == c; | |
214 | ||
215 | if (*a == 0) | |
216 | return true; | |
217 | ||
218 | a++, b++; | |
219 | } | |
220 | } | |
221 | ||
222 | bool namespace_simple_pattern(const char *pattern, const char *value) { | |
223 | return simple_pattern_check('.', pattern, value); | |
224 | } | |
225 | ||
226 | bool path_simple_pattern(const char *pattern, const char *value) { | |
227 | return simple_pattern_check('/', pattern, value); | |
228 | } | |
229 | ||
230 | int bus_message_type_from_string(const char *s, uint8_t *u) { | |
231 | if (streq(s, "signal")) | |
232 | *u = SD_BUS_MESSAGE_TYPE_SIGNAL; | |
233 | else if (streq(s, "method_call")) | |
234 | *u = SD_BUS_MESSAGE_TYPE_METHOD_CALL; | |
235 | else if (streq(s, "error")) | |
236 | *u = SD_BUS_MESSAGE_TYPE_METHOD_ERROR; | |
237 | else if (streq(s, "method_return")) | |
238 | *u = SD_BUS_MESSAGE_TYPE_METHOD_RETURN; | |
239 | else | |
240 | return -EINVAL; | |
241 | ||
242 | return 0; | |
243 | } | |
a56f19c4 LP |
244 | |
245 | const char *bus_message_type_to_string(uint8_t u) { | |
246 | if (u == SD_BUS_MESSAGE_TYPE_SIGNAL) | |
247 | return "signal"; | |
248 | else if (u == SD_BUS_MESSAGE_TYPE_METHOD_CALL) | |
249 | return "method_call"; | |
250 | else if (u == SD_BUS_MESSAGE_TYPE_METHOD_ERROR) | |
251 | return "error"; | |
252 | else if (u == SD_BUS_MESSAGE_TYPE_METHOD_RETURN) | |
253 | return "method_return"; | |
254 | else | |
255 | return NULL; | |
256 | } |