1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
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.
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.
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/>.
22 #include "bus-message.h"
23 #include "bus-internal.h"
25 bool object_path_is_valid(const char *p) {
38 for (slash = true, q = p+1; *q; q++)
48 (*q >= 'a' && *q <= 'z') ||
49 (*q >= 'A' && *q <= 'Z') ||
50 (*q >= '0' && *q <= '9') ||
65 char* object_path_startswith(const char *a, const char *b) {
68 if (!object_path_is_valid(a) ||
69 !object_path_is_valid(b))
88 bool interface_name_is_valid(const char *p) {
90 bool dot, found_dot = false;
95 for (dot = true, q = p; *q; q++)
100 found_dot = dot = true;
105 (*q >= 'a' && *q <= 'z') ||
106 (*q >= 'A' && *q <= 'Z') ||
107 (!dot && *q >= '0' && *q <= '9') ||
128 bool service_name_is_valid(const char *p) {
130 bool dot, found_dot = false, unique;
135 unique = p[0] == ':';
137 for (dot = true, q = unique ? p+1 : p; *q; q++)
142 found_dot = dot = true;
147 (*q >= 'a' && *q <= 'z') ||
148 (*q >= 'A' && *q <= 'Z') ||
149 ((!dot || unique) && *q >= '0' && *q <= '9') ||
150 *q == '_' || *q == '-';
170 /// UNNEEDED by elogind
172 char* service_name_startswith(const char *a, const char *b) {
175 if (!service_name_is_valid(a) ||
176 !service_name_is_valid(b))
179 p = startswith(a, b);
187 return (char*) p + 1;
193 bool member_name_is_valid(const char *p) {
199 for (q = p; *q; q++) {
203 (*q >= 'a' && *q <= 'z') ||
204 (*q >= 'A' && *q <= 'Z') ||
205 (*q >= '0' && *q <= '9') ||
219 * Complex pattern match
220 * This checks whether @a is a 'complex-prefix' of @b, or @b is a
221 * 'complex-prefix' of @a, based on strings that consist of labels with @c as
222 * spearator. This function returns true if:
223 * - both strings are equal
224 * - either is a prefix of the other and ends with @c
225 * The second rule makes sure that either string needs to be fully included in
226 * the other, and the string which is considered the prefix needs to end with a
229 static bool complex_pattern_check(char c, const char *a, const char *b) {
230 bool separator = false;
240 return (separator && (*a == 0 || *b == 0));
251 bool namespace_complex_pattern(const char *pattern, const char *value) {
252 return complex_pattern_check('.', pattern, value);
255 bool path_complex_pattern(const char *pattern, const char *value) {
256 return complex_pattern_check('/', pattern, value);
260 * Simple pattern match
261 * This checks whether @a is a 'simple-prefix' of @b, based on strings that
262 * consist of labels with @c as separator. This function returns true, if:
263 * - if @a and @b are equal
264 * - if @a is a prefix of @b, and the first following character in @b (or the
265 * last character in @a) is @c
266 * The second rule basically makes sure that if @a is a prefix of @b, then @b
267 * must follow with a new label separated by @c. It cannot extend the label.
269 static bool simple_pattern_check(char c, const char *a, const char *b) {
270 bool separator = false;
280 return *a == 0 && (*b == c || separator);
291 bool namespace_simple_pattern(const char *pattern, const char *value) {
292 return simple_pattern_check('.', pattern, value);
295 bool path_simple_pattern(const char *pattern, const char *value) {
296 return simple_pattern_check('/', pattern, value);
299 int bus_message_type_from_string(const char *s, uint8_t *u) {
300 if (streq(s, "signal"))
301 *u = SD_BUS_MESSAGE_SIGNAL;
302 else if (streq(s, "method_call"))
303 *u = SD_BUS_MESSAGE_METHOD_CALL;
304 else if (streq(s, "error"))
305 *u = SD_BUS_MESSAGE_METHOD_ERROR;
306 else if (streq(s, "method_return"))
307 *u = SD_BUS_MESSAGE_METHOD_RETURN;
314 const char *bus_message_type_to_string(uint8_t u) {
315 if (u == SD_BUS_MESSAGE_SIGNAL)
317 else if (u == SD_BUS_MESSAGE_METHOD_CALL)
318 return "method_call";
319 else if (u == SD_BUS_MESSAGE_METHOD_ERROR)
321 else if (u == SD_BUS_MESSAGE_METHOD_RETURN)
322 return "method_return";
327 char *bus_address_escape(const char *v) {
331 r = new(char, strlen(v)*3+1);
335 for (a = v, b = r; *a; a++) {
337 if ((*a >= '0' && *a <= '9') ||
338 (*a >= 'a' && *a <= 'z') ||
339 (*a >= 'A' && *a <= 'Z') ||
344 *(b++) = hexchar(*a >> 4);
345 *(b++) = hexchar(*a & 0xF);
353 int bus_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error) {
357 if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
358 sd_bus_reply_method_errno(m, r, error);
360 } else if (sd_bus_error_is_set(error)) {
361 if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
362 sd_bus_reply_method_error(m, error);
366 log_debug("Failed to process message [type=%s sender=%s path=%s interface=%s member=%s signature=%s]: %s",
367 bus_message_type_to_string(m->header->type),
372 strna(m->root_container.signature),
373 bus_error_message(error, r));