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-rw-r--r--src/libsystemd/sd-bus/bus-internal.c338
1 files changed, 338 insertions, 0 deletions
diff --git a/src/libsystemd/sd-bus/bus-internal.c b/src/libsystemd/sd-bus/bus-internal.c
new file mode 100644
index 0000000..3f03ad7
--- /dev/null
+++ b/src/libsystemd/sd-bus/bus-internal.c
@@ -0,0 +1,338 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "bus-internal.h"
+#include "bus-message.h"
+#include "hexdecoct.h"
+#include "string-util.h"
+
+bool object_path_is_valid(const char *p) {
+ const char *q;
+ bool slash;
+
+ if (!p)
+ return false;
+
+ if (p[0] != '/')
+ return false;
+
+ if (p[1] == 0)
+ return true;
+
+ for (slash = true, q = p+1; *q; q++)
+ if (*q == '/') {
+ if (slash)
+ return false;
+
+ slash = true;
+ } else {
+ bool good;
+
+ good =
+ (*q >= 'a' && *q <= 'z') ||
+ (*q >= 'A' && *q <= 'Z') ||
+ (*q >= '0' && *q <= '9') ||
+ *q == '_';
+
+ if (!good)
+ return false;
+
+ slash = false;
+ }
+
+ if (slash)
+ return false;
+
+ return (q - p) <= BUS_PATH_SIZE_MAX;
+}
+
+char* object_path_startswith(const char *a, const char *b) {
+ const char *p;
+
+ if (!object_path_is_valid(a) ||
+ !object_path_is_valid(b))
+ return NULL;
+
+ if (streq(b, "/"))
+ return (char*) a + 1;
+
+ p = startswith(a, b);
+ if (!p)
+ return NULL;
+
+ if (*p == 0)
+ return (char*) p;
+
+ if (*p == '/')
+ return (char*) p + 1;
+
+ return NULL;
+}
+
+bool interface_name_is_valid(const char *p) {
+ const char *q;
+ bool dot, found_dot = false;
+
+ if (isempty(p))
+ return false;
+
+ for (dot = true, q = p; *q; q++)
+ if (*q == '.') {
+ if (dot)
+ return false;
+
+ found_dot = dot = true;
+ } else {
+ bool good;
+
+ good =
+ (*q >= 'a' && *q <= 'z') ||
+ (*q >= 'A' && *q <= 'Z') ||
+ (!dot && *q >= '0' && *q <= '9') ||
+ *q == '_';
+
+ if (!good)
+ return false;
+
+ dot = false;
+ }
+
+ if (q - p > SD_BUS_MAXIMUM_NAME_LENGTH)
+ return false;
+
+ if (dot)
+ return false;
+
+ if (!found_dot)
+ return false;
+
+ return true;
+}
+
+bool service_name_is_valid(const char *p) {
+ const char *q;
+ bool dot, found_dot = false, unique;
+
+ if (isempty(p))
+ return false;
+
+ unique = p[0] == ':';
+
+ for (dot = true, q = unique ? p+1 : p; *q; q++)
+ if (*q == '.') {
+ if (dot)
+ return false;
+
+ found_dot = dot = true;
+ } else {
+ bool good;
+
+ good =
+ (*q >= 'a' && *q <= 'z') ||
+ (*q >= 'A' && *q <= 'Z') ||
+ ((!dot || unique) && *q >= '0' && *q <= '9') ||
+ IN_SET(*q, '_', '-');
+
+ if (!good)
+ return false;
+
+ dot = false;
+ }
+
+ if (q - p > SD_BUS_MAXIMUM_NAME_LENGTH)
+ return false;
+
+ if (dot)
+ return false;
+
+ if (!found_dot)
+ return false;
+
+ return true;
+}
+
+bool member_name_is_valid(const char *p) {
+ const char *q;
+
+ if (isempty(p))
+ return false;
+
+ for (q = p; *q; q++) {
+ bool good;
+
+ good =
+ (*q >= 'a' && *q <= 'z') ||
+ (*q >= 'A' && *q <= 'Z') ||
+ (*q >= '0' && *q <= '9') ||
+ *q == '_';
+
+ if (!good)
+ return false;
+ }
+
+ if (q - p > SD_BUS_MAXIMUM_NAME_LENGTH)
+ return false;
+
+ return true;
+}
+
+/*
+ * Complex pattern match
+ * This checks whether @a is a 'complex-prefix' of @b, or @b is a
+ * 'complex-prefix' of @a, based on strings that consist of labels with @c as
+ * separator. This function returns true if:
+ * - both strings are equal
+ * - either is a prefix of the other and ends with @c
+ * The second rule makes sure that either string needs to be fully included in
+ * the other, and the string which is considered the prefix needs to end with a
+ * separator.
+ */
+static bool complex_pattern_check(char c, const char *a, const char *b) {
+ bool separator = false;
+
+ if (!a && !b)
+ return true;
+
+ if (!a || !b)
+ return false;
+
+ for (;;) {
+ if (*a != *b)
+ return (separator && (*a == 0 || *b == 0));
+
+ if (*a == 0)
+ return true;
+
+ separator = *a == c;
+
+ a++, b++;
+ }
+}
+
+bool namespace_complex_pattern(const char *pattern, const char *value) {
+ return complex_pattern_check('.', pattern, value);
+}
+
+bool path_complex_pattern(const char *pattern, const char *value) {
+ return complex_pattern_check('/', pattern, value);
+}
+
+/*
+ * Simple pattern match
+ * This checks whether @a is a 'simple-prefix' of @b, based on strings that
+ * consist of labels with @c as separator. This function returns true, if:
+ * - if @a and @b are equal
+ * - if @a is a prefix of @b, and the first following character in @b (or the
+ * last character in @a) is @c
+ * The second rule basically makes sure that if @a is a prefix of @b, then @b
+ * must follow with a new label separated by @c. It cannot extend the label.
+ */
+static bool simple_pattern_check(char c, const char *a, const char *b) {
+ bool separator = false;
+
+ if (!a && !b)
+ return true;
+
+ if (!a || !b)
+ return false;
+
+ for (;;) {
+ if (*a != *b)
+ return *a == 0 && (*b == c || separator);
+
+ if (*a == 0)
+ return true;
+
+ separator = *a == c;
+
+ a++, b++;
+ }
+}
+
+bool namespace_simple_pattern(const char *pattern, const char *value) {
+ return simple_pattern_check('.', pattern, value);
+}
+
+bool path_simple_pattern(const char *pattern, const char *value) {
+ return simple_pattern_check('/', pattern, value);
+}
+
+int bus_message_type_from_string(const char *s, uint8_t *u) {
+ if (streq(s, "signal"))
+ *u = SD_BUS_MESSAGE_SIGNAL;
+ else if (streq(s, "method_call"))
+ *u = SD_BUS_MESSAGE_METHOD_CALL;
+ else if (streq(s, "error"))
+ *u = SD_BUS_MESSAGE_METHOD_ERROR;
+ else if (streq(s, "method_return"))
+ *u = SD_BUS_MESSAGE_METHOD_RETURN;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+const char *bus_message_type_to_string(uint8_t u) {
+ if (u == SD_BUS_MESSAGE_SIGNAL)
+ return "signal";
+ else if (u == SD_BUS_MESSAGE_METHOD_CALL)
+ return "method_call";
+ else if (u == SD_BUS_MESSAGE_METHOD_ERROR)
+ return "error";
+ else if (u == SD_BUS_MESSAGE_METHOD_RETURN)
+ return "method_return";
+ else
+ return NULL;
+}
+
+char *bus_address_escape(const char *v) {
+ const char *a;
+ char *r, *b;
+
+ r = new(char, strlen(v)*3+1);
+ if (!r)
+ return NULL;
+
+ for (a = v, b = r; *a; a++) {
+
+ if ((*a >= '0' && *a <= '9') ||
+ (*a >= 'a' && *a <= 'z') ||
+ (*a >= 'A' && *a <= 'Z') ||
+ strchr("_-/.", *a))
+ *(b++) = *a;
+ else {
+ *(b++) = '%';
+ *(b++) = hexchar(*a >> 4);
+ *(b++) = hexchar(*a & 0xF);
+ }
+ }
+
+ *b = 0;
+ return r;
+}
+
+int bus_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error) {
+ assert(m);
+
+ if (sd_bus_error_is_set(error) || r < 0) {
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
+ sd_bus_reply_method_errno(m, r, error);
+ } else
+ return r;
+
+ log_debug("Failed to process message type=%s sender=%s destination=%s path=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " signature=%s error-name=%s error-message=%s: %s",
+ bus_message_type_to_string(m->header->type),
+ strna(sd_bus_message_get_sender(m)),
+ strna(sd_bus_message_get_destination(m)),
+ strna(sd_bus_message_get_path(m)),
+ strna(sd_bus_message_get_interface(m)),
+ strna(sd_bus_message_get_member(m)),
+ BUS_MESSAGE_COOKIE(m),
+ m->reply_cookie,
+ strna(m->root_container.signature),
+ strna(m->error.name),
+ strna(m->error.message),
+ bus_error_message(error, r));
+
+ return 1;
+}
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