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nest-open-source / nest-cam / 4320010 / dbus / 0a7bbbd55c15c34dfd8cf7395faabe97cf421e08 / . / dbus / bus / signals.c
blob: 28506d3fdf6b18c7879d9b8d73bb57bb60a04f96 [file] [log] [blame]
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* signals.c Bus signal connection implementation
*
* Copyright (C) 2003, 2005 Red Hat, Inc.
*
* Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <config.h>
#include "signals.h"
#include "services.h"
#include "utils.h"
#include <dbus/dbus-marshal-validate.h>
struct BusMatchRule
{
int refcount; /**< reference count */
DBusConnection *matches_go_to; /**< Owner of the rule */
unsigned int flags; /**< BusMatchFlags */
int message_type;
char *interface;
char *member;
char *sender;
char *destination;
char *path;
unsigned int *arg_lens;
char **args;
int args_len;
};
#define BUS_MATCH_ARG_NAMESPACE 0x4000000u
#define BUS_MATCH_ARG_IS_PATH 0x8000000u
#define BUS_MATCH_ARG_FLAGS (BUS_MATCH_ARG_NAMESPACE | BUS_MATCH_ARG_IS_PATH)
BusMatchRule*
bus_match_rule_new (DBusConnection *matches_go_to)
{
BusMatchRule *rule;
rule = dbus_new0 (BusMatchRule, 1);
if (rule == NULL)
return NULL;
rule->refcount = 1;
rule->matches_go_to = matches_go_to;
#ifndef DBUS_BUILD_TESTS
_dbus_assert (rule->matches_go_to != NULL);
#endif
return rule;
}
BusMatchRule *
bus_match_rule_ref (BusMatchRule *rule)
{
_dbus_assert (rule->refcount > 0);
rule->refcount += 1;
return rule;
}
void
bus_match_rule_unref (BusMatchRule *rule)
{
_dbus_assert (rule->refcount > 0);
rule->refcount -= 1;
if (rule->refcount == 0)
{
dbus_free (rule->interface);
dbus_free (rule->member);
dbus_free (rule->sender);
dbus_free (rule->destination);
dbus_free (rule->path);
dbus_free (rule->arg_lens);
/* can't use dbus_free_string_array() since there
* are embedded NULL
*/
if (rule->args)
{
int i;
i = 0;
while (i < rule->args_len)
{
if (rule->args[i])
dbus_free (rule->args[i]);
++i;
}
dbus_free (rule->args);
}
dbus_free (rule);
}
}
#ifdef DBUS_ENABLE_VERBOSE_MODE
/* Note this function does not do escaping, so it's only
* good for debug spew at the moment
*/
static char*
match_rule_to_string (BusMatchRule *rule)
{
DBusString str;
char *ret;
if (!_dbus_string_init (&str))
{
char *s;
while ((s = _dbus_strdup ("nomem")) == NULL)
; /* only OK for debug spew... */
return s;
}
if (rule->flags & BUS_MATCH_MESSAGE_TYPE)
{
if (!_dbus_string_append_printf (&str, "type='%s'",
dbus_message_type_to_string (rule->message_type)))
goto nomem;
}
if (rule->flags & BUS_MATCH_INTERFACE)
{
if (_dbus_string_get_length (&str) > 0)
{
if (!_dbus_string_append (&str, ","))
goto nomem;
}
if (!_dbus_string_append_printf (&str, "interface='%s'", rule->interface))
goto nomem;
}
if (rule->flags & BUS_MATCH_MEMBER)
{
if (_dbus_string_get_length (&str) > 0)
{
if (!_dbus_string_append (&str, ","))
goto nomem;
}
if (!_dbus_string_append_printf (&str, "member='%s'", rule->member))
goto nomem;
}
if (rule->flags & BUS_MATCH_PATH)
{
if (_dbus_string_get_length (&str) > 0)
{
if (!_dbus_string_append (&str, ","))
goto nomem;
}
if (!_dbus_string_append_printf (&str, "path='%s'", rule->path))
goto nomem;
}
if (rule->flags & BUS_MATCH_PATH_NAMESPACE)
{
if (_dbus_string_get_length (&str) > 0)
{
if (!_dbus_string_append (&str, ","))
goto nomem;
}
if (!_dbus_string_append_printf (&str, "path_namespace='%s'", rule->path))
goto nomem;
}
if (rule->flags & BUS_MATCH_SENDER)
{
if (_dbus_string_get_length (&str) > 0)
{
if (!_dbus_string_append (&str, ","))
goto nomem;
}
if (!_dbus_string_append_printf (&str, "sender='%s'", rule->sender))
goto nomem;
}
if (rule->flags & BUS_MATCH_DESTINATION)
{
if (_dbus_string_get_length (&str) > 0)
{
if (!_dbus_string_append (&str, ","))
goto nomem;
}
if (!_dbus_string_append_printf (&str, "destination='%s'", rule->destination))
goto nomem;
}
if (rule->flags & BUS_MATCH_CLIENT_IS_EAVESDROPPING)
{
if (_dbus_string_get_length (&str) > 0)
{
if (!_dbus_string_append (&str, ","))
goto nomem;
}
if (!_dbus_string_append_printf (&str, "eavesdrop='%s'",
(rule->flags & BUS_MATCH_CLIENT_IS_EAVESDROPPING) ?
"true" : "false"))
goto nomem;
}
if (rule->flags & BUS_MATCH_ARGS)
{
int i;
_dbus_assert (rule->args != NULL);
i = 0;
while (i < rule->args_len)
{
if (rule->args[i] != NULL)
{
dbus_bool_t is_path, is_namespace;
if (_dbus_string_get_length (&str) > 0)
{
if (!_dbus_string_append (&str, ","))
goto nomem;
}
is_path = (rule->arg_lens[i] & BUS_MATCH_ARG_IS_PATH) != 0;
is_namespace = (rule->arg_lens[i] & BUS_MATCH_ARG_NAMESPACE) != 0;
if (!_dbus_string_append_printf (&str,
"arg%d%s='%s'",
i,
is_path ? "path" :
is_namespace ? "namespace" : "",
rule->args[i]))
goto nomem;
}
++i;
}
}
if (!_dbus_string_steal_data (&str, &ret))
goto nomem;
_dbus_string_free (&str);
return ret;
nomem:
_dbus_string_free (&str);
{
char *s;
while ((s = _dbus_strdup ("nomem")) == NULL)
; /* only OK for debug spew... */
return s;
}
}
#endif /* DBUS_ENABLE_VERBOSE_MODE */
dbus_bool_t
bus_match_rule_set_message_type (BusMatchRule *rule,
int type)
{
rule->flags |= BUS_MATCH_MESSAGE_TYPE;
rule->message_type = type;
return TRUE;
}
dbus_bool_t
bus_match_rule_set_interface (BusMatchRule *rule,
const char *interface)
{
char *new;
_dbus_assert (interface != NULL);
new = _dbus_strdup (interface);
if (new == NULL)
return FALSE;
rule->flags |= BUS_MATCH_INTERFACE;
dbus_free (rule->interface);
rule->interface = new;
return TRUE;
}
dbus_bool_t
bus_match_rule_set_member (BusMatchRule *rule,
const char *member)
{
char *new;
_dbus_assert (member != NULL);
new = _dbus_strdup (member);
if (new == NULL)
return FALSE;
rule->flags |= BUS_MATCH_MEMBER;
dbus_free (rule->member);
rule->member = new;
return TRUE;
}
dbus_bool_t
bus_match_rule_set_sender (BusMatchRule *rule,
const char *sender)
{
char *new;
_dbus_assert (sender != NULL);
new = _dbus_strdup (sender);
if (new == NULL)
return FALSE;
rule->flags |= BUS_MATCH_SENDER;
dbus_free (rule->sender);
rule->sender = new;
return TRUE;
}
dbus_bool_t
bus_match_rule_set_destination (BusMatchRule *rule,
const char *destination)
{
char *new;
_dbus_assert (destination != NULL);
new = _dbus_strdup (destination);
if (new == NULL)
return FALSE;
rule->flags |= BUS_MATCH_DESTINATION;
dbus_free (rule->destination);
rule->destination = new;
return TRUE;
}
void
bus_match_rule_set_client_is_eavesdropping (BusMatchRule *rule,
dbus_bool_t is_eavesdropping)
{
if (is_eavesdropping)
rule->flags |= BUS_MATCH_CLIENT_IS_EAVESDROPPING;
else
rule->flags &= ~(BUS_MATCH_CLIENT_IS_EAVESDROPPING);
}
dbus_bool_t
bus_match_rule_set_path (BusMatchRule *rule,
const char *path,
dbus_bool_t is_namespace)
{
char *new;
_dbus_assert (path != NULL);
new = _dbus_strdup (path);
if (new == NULL)
return FALSE;
rule->flags &= ~(BUS_MATCH_PATH|BUS_MATCH_PATH_NAMESPACE);
if (is_namespace)
rule->flags |= BUS_MATCH_PATH_NAMESPACE;
else
rule->flags |= BUS_MATCH_PATH;
dbus_free (rule->path);
rule->path = new;
return TRUE;
}
dbus_bool_t
bus_match_rule_set_arg (BusMatchRule *rule,
int arg,
const DBusString *value,
dbus_bool_t is_path,
dbus_bool_t is_namespace)
{
int length;
char *new;
_dbus_assert (value != NULL);
/* args_len is the number of args not including null termination
* in the char**
*/
if (arg >= rule->args_len)
{
unsigned int *new_arg_lens;
char **new_args;
int new_args_len;
int i;
new_args_len = arg + 1;
/* add another + 1 here for null termination */
new_args = dbus_realloc (rule->args,
sizeof (char *) * (new_args_len + 1));
if (new_args == NULL)
return FALSE;
/* NULL the new slots */
i = rule->args_len;
while (i <= new_args_len) /* <= for null termination */
{
new_args[i] = NULL;
++i;
}
rule->args = new_args;
/* and now add to the lengths */
new_arg_lens = dbus_realloc (rule->arg_lens,
sizeof (int) * (new_args_len + 1));
if (new_arg_lens == NULL)
return FALSE;
/* zero the new slots */
i = rule->args_len;
while (i <= new_args_len) /* <= for null termination */
{
new_arg_lens[i] = 0;
++i;
}
rule->arg_lens = new_arg_lens;
rule->args_len = new_args_len;
}
length = _dbus_string_get_length (value);
if (!_dbus_string_copy_data (value, &new))
return FALSE;
rule->flags |= BUS_MATCH_ARGS;
dbus_free (rule->args[arg]);
rule->arg_lens[arg] = length;
rule->args[arg] = new;
if (is_path)
rule->arg_lens[arg] |= BUS_MATCH_ARG_IS_PATH;
if (is_namespace)
rule->arg_lens[arg] |= BUS_MATCH_ARG_NAMESPACE;
/* NULL termination didn't get busted */
_dbus_assert (rule->args[rule->args_len] == NULL);
_dbus_assert (rule->arg_lens[rule->args_len] == 0);
return TRUE;
}
#define ISWHITE(c) (((c) == ' ') || ((c) == '\t') || ((c) == '\n') || ((c) == '\r'))
static dbus_bool_t
find_key (const DBusString *str,
int start,
DBusString *key,
int *value_pos,
DBusError *error)
{
const char *p;
const char *s;
const char *key_start;
const char *key_end;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
s = _dbus_string_get_const_data (str);
p = s + start;
while (*p && ISWHITE (*p))
++p;
key_start = p;
while (*p && *p != '=' && !ISWHITE (*p))
++p;
key_end = p;
while (*p && ISWHITE (*p))
++p;
if (key_start == key_end)
{
/* Empty match rules or trailing whitespace are OK */
*value_pos = p - s;
return TRUE;
}
if (*p != '=')
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Match rule has a key with no subsequent '=' character");
return FALSE;
}
++p;
if (!_dbus_string_append_len (key, key_start, key_end - key_start))
{
BUS_SET_OOM (error);
return FALSE;
}
*value_pos = p - s;
return TRUE;
}
static dbus_bool_t
find_value (const DBusString *str,
int start,
const char *key,
DBusString *value,
int *value_end,
DBusError *error)
{
const char *p;
const char *s;
char quote_char;
int orig_len;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
orig_len = _dbus_string_get_length (value);
s = _dbus_string_get_const_data (str);
p = s + start;
quote_char = '\0';
while (*p)
{
if (quote_char == '\0')
{
switch (*p)
{
case '\0':
goto done;
case '\'':
quote_char = '\'';
goto next;
case ',':
++p;
goto done;
case '\\':
quote_char = '\\';
goto next;
default:
if (!_dbus_string_append_byte (value, *p))
{
BUS_SET_OOM (error);
goto failed;
}
}
}
else if (quote_char == '\\')
{
/* \ only counts as an escape if escaping a quote mark */
if (*p != '\'')
{
if (!_dbus_string_append_byte (value, '\\'))
{
BUS_SET_OOM (error);
goto failed;
}
}
if (!_dbus_string_append_byte (value, *p))
{
BUS_SET_OOM (error);
goto failed;
}
quote_char = '\0';
}
else
{
_dbus_assert (quote_char == '\'');
if (*p == '\'')
{
quote_char = '\0';
}
else
{
if (!_dbus_string_append_byte (value, *p))
{
BUS_SET_OOM (error);
goto failed;
}
}
}
next:
++p;
}
done:
if (quote_char == '\\')
{
if (!_dbus_string_append_byte (value, '\\'))
{
BUS_SET_OOM (error);
goto failed;
}
}
else if (quote_char == '\'')
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Unbalanced quotation marks in match rule");
goto failed;
}
else
_dbus_assert (quote_char == '\0');
/* Zero-length values are allowed */
*value_end = p - s;
return TRUE;
failed:
_DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_string_set_length (value, orig_len);
return FALSE;
}
/* duplicates aren't allowed so the real legitimate max is only 6 or
* so. Leaving extra so we don't have to bother to update it.
* FIXME this is sort of busted now with arg matching, but we let
* you match on up to 10 args for now
*/
#define MAX_RULE_TOKENS 16
/* this is slightly too high level to be termed a "token"
* but let's not be pedantic.
*/
typedef struct
{
char *key;
char *value;
} RuleToken;
static dbus_bool_t
tokenize_rule (const DBusString *rule_text,
RuleToken tokens[MAX_RULE_TOKENS],
DBusError *error)
{
int i;
int pos;
DBusString key;
DBusString value;
dbus_bool_t retval;
retval = FALSE;
if (!_dbus_string_init (&key))
{
BUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_init (&value))
{
_dbus_string_free (&key);
BUS_SET_OOM (error);
return FALSE;
}
i = 0;
pos = 0;
while (i < MAX_RULE_TOKENS &&
pos < _dbus_string_get_length (rule_text))
{
_dbus_assert (tokens[i].key == NULL);
_dbus_assert (tokens[i].value == NULL);
if (!find_key (rule_text, pos, &key, &pos, error))
goto out;
if (_dbus_string_get_length (&key) == 0)
goto next;
if (!_dbus_string_steal_data (&key, &tokens[i].key))
{
BUS_SET_OOM (error);
goto out;
}
if (!find_value (rule_text, pos, tokens[i].key, &value, &pos, error))
goto out;
if (!_dbus_string_steal_data (&value, &tokens[i].value))
{
BUS_SET_OOM (error);
goto out;
}
next:
++i;
}
retval = TRUE;
out:
if (!retval)
{
i = 0;
while (tokens[i].key || tokens[i].value)
{
dbus_free (tokens[i].key);
dbus_free (tokens[i].value);
tokens[i].key = NULL;
tokens[i].value = NULL;
++i;
}
}
_dbus_string_free (&key);
_dbus_string_free (&value);
return retval;
}
static dbus_bool_t
bus_match_rule_parse_arg_match (BusMatchRule *rule,
const char *key,
const DBusString *value,
DBusError *error)
{
dbus_bool_t is_path = FALSE;
dbus_bool_t is_namespace = FALSE;
DBusString key_str;
unsigned long arg;
int length;
int end;
/* For now, arg0='foo' always implies that 'foo' is a
* DBUS_TYPE_STRING. Someday we could add an arg0type='int32' thing
* if we wanted, which would specify another type, in which case
* arg0='5' would have the 5 parsed as an int rather than string.
*/
/* First we need to parse arg0 = 0, arg27 = 27 */
_dbus_string_init_const (&key_str, key);
length = _dbus_string_get_length (&key_str);
if (_dbus_string_get_length (&key_str) < 4)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key '%s' in match rule starts with 'arg' but lacks an arg number. Should be 'arg0' or 'arg7' for example.\n", key);
goto failed;
}
if (!_dbus_string_parse_uint (&key_str, 3, &arg, &end))
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key '%s' in match rule starts with 'arg' but could not parse arg number. Should be 'arg0' or 'arg7' for example.\n", key);
goto failed;
}
if (end != length)
{
if ((end + strlen ("path")) == length &&
_dbus_string_ends_with_c_str (&key_str, "path"))
{
is_path = TRUE;
}
else if (_dbus_string_equal_c_str (&key_str, "arg0namespace"))
{
int value_len = _dbus_string_get_length (value);
is_namespace = TRUE;
if (!_dbus_validate_bus_namespace (value, 0, value_len))
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"arg0namespace='%s' is not a valid prefix of a bus name",
_dbus_string_get_const_data (value));
goto failed;
}
}
else
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key '%s' in match rule contains junk after argument number (%u). Only 'arg%upath' (for example) or 'arg0namespace' are valid", key, arg, arg);
goto failed;
}
}
/* If we didn't check this we could allocate a huge amount of RAM */
if (arg > DBUS_MAXIMUM_MATCH_RULE_ARG_NUMBER)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key '%s' in match rule has arg number %lu but the maximum is %d.\n", key, (unsigned long) arg, DBUS_MAXIMUM_MATCH_RULE_ARG_NUMBER);
goto failed;
}
if ((rule->flags & BUS_MATCH_ARGS) &&
rule->args_len > (int) arg &&
rule->args[arg] != NULL)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Argument %d matched more than once in match rule\n", key);
goto failed;
}
if (!bus_match_rule_set_arg (rule, arg, value, is_path, is_namespace))
{
BUS_SET_OOM (error);
goto failed;
}
return TRUE;
failed:
_DBUS_ASSERT_ERROR_IS_SET (error);
return FALSE;
}
/*
* The format is comma-separated with strings quoted with single quotes
* as for the shell (to escape a literal single quote, use '\'').
*
* type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='Foo',
* path='/bar/foo',destination=':452345.34'
*
*/
BusMatchRule*
bus_match_rule_parse (DBusConnection *matches_go_to,
const DBusString *rule_text,
DBusError *error)
{
BusMatchRule *rule;
RuleToken tokens[MAX_RULE_TOKENS+1]; /* NULL termination + 1 */
int i;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
if (_dbus_string_get_length (rule_text) > DBUS_MAXIMUM_MATCH_RULE_LENGTH)
{
dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
"Match rule text is %d bytes, maximum is %d",
_dbus_string_get_length (rule_text),
DBUS_MAXIMUM_MATCH_RULE_LENGTH);
return NULL;
}
memset (tokens, '\0', sizeof (tokens));
rule = bus_match_rule_new (matches_go_to);
if (rule == NULL)
{
BUS_SET_OOM (error);
goto failed;
}
if (!tokenize_rule (rule_text, tokens, error))
goto failed;
i = 0;
while (tokens[i].key != NULL)
{
DBusString tmp_str;
int len;
const char *key = tokens[i].key;
const char *value = tokens[i].value;
_dbus_string_init_const (&tmp_str, value);
len = _dbus_string_get_length (&tmp_str);
if (strcmp (key, "type") == 0)
{
int t;
if (rule->flags & BUS_MATCH_MESSAGE_TYPE)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key %s specified twice in match rule\n", key);
goto failed;
}
t = dbus_message_type_from_string (value);
if (t == DBUS_MESSAGE_TYPE_INVALID)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Invalid message type (%s) in match rule\n", value);
goto failed;
}
if (!bus_match_rule_set_message_type (rule, t))
{
BUS_SET_OOM (error);
goto failed;
}
}
else if (strcmp (key, "sender") == 0)
{
if (rule->flags & BUS_MATCH_SENDER)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key %s specified twice in match rule\n", key);
goto failed;
}
if (!_dbus_validate_bus_name (&tmp_str, 0, len))
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Sender name '%s' is invalid\n", value);
goto failed;
}
if (!bus_match_rule_set_sender (rule, value))
{
BUS_SET_OOM (error);
goto failed;
}
}
else if (strcmp (key, "interface") == 0)
{
if (rule->flags & BUS_MATCH_INTERFACE)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key %s specified twice in match rule\n", key);
goto failed;
}
if (!_dbus_validate_interface (&tmp_str, 0, len))
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Interface name '%s' is invalid\n", value);
goto failed;
}
if (!bus_match_rule_set_interface (rule, value))
{
BUS_SET_OOM (error);
goto failed;
}
}
else if (strcmp (key, "member") == 0)
{
if (rule->flags & BUS_MATCH_MEMBER)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key %s specified twice in match rule\n", key);
goto failed;
}
if (!_dbus_validate_member (&tmp_str, 0, len))
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Member name '%s' is invalid\n", value);
goto failed;
}
if (!bus_match_rule_set_member (rule, value))
{
BUS_SET_OOM (error);
goto failed;
}
}
else if (strcmp (key, "path") == 0 ||
strcmp (key, "path_namespace") == 0)
{
dbus_bool_t is_namespace = (strcmp (key, "path_namespace") == 0);
if (rule->flags & (BUS_MATCH_PATH | BUS_MATCH_PATH_NAMESPACE))
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"path or path_namespace specified twice in match rule\n");
goto failed;
}
if (!_dbus_validate_path (&tmp_str, 0, len))
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Path '%s' is invalid\n", value);
goto failed;
}
if (!bus_match_rule_set_path (rule, value, is_namespace))
{
BUS_SET_OOM (error);
goto failed;
}
}
else if (strcmp (key, "destination") == 0)
{
if (rule->flags & BUS_MATCH_DESTINATION)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Key %s specified twice in match rule\n", key);
goto failed;
}
if (!_dbus_validate_bus_name (&tmp_str, 0, len))
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Destination name '%s' is invalid\n", value);
goto failed;
}
if (!bus_match_rule_set_destination (rule, value))
{
BUS_SET_OOM (error);
goto failed;
}
}
else if (strcmp (key, "eavesdrop") == 0)
{
/* do not detect "eavesdrop" being used more than once in rule:
* 1) it's not possible, it's only in the flags
* 2) it might be used twice to disable eavesdropping when it's
* automatically added (eg dbus-monitor/bustle) */
/* we accept only "true|false" as possible values */
if ((strcmp (value, "true") == 0))
{
bus_match_rule_set_client_is_eavesdropping (rule, TRUE);
}
else if (strcmp (value, "false") == 0)
{
bus_match_rule_set_client_is_eavesdropping (rule, FALSE);
}
else
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"eavesdrop='%s' is invalid, "
"it should be 'true' or 'false'\n",
value);
goto failed;
}
}
else if (strncmp (key, "arg", 3) == 0)
{
if (!bus_match_rule_parse_arg_match (rule, key, &tmp_str, error))
goto failed;
}
else
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_INVALID,
"Unknown key \"%s\" in match rule",
key);
goto failed;
}
++i;
}
goto out;
failed:
_DBUS_ASSERT_ERROR_IS_SET (error);
if (rule)
{
bus_match_rule_unref (rule);
rule = NULL;
}
out:
i = 0;
while (tokens[i].key || tokens[i].value)
{
_dbus_assert (i < MAX_RULE_TOKENS);
dbus_free (tokens[i].key);
dbus_free (tokens[i].value);
++i;
}
return rule;
}
typedef struct RulePool RulePool;
struct RulePool
{
/* Maps non-NULL interface names to non-NULL (DBusList **)s */
DBusHashTable *rules_by_iface;
/* List of BusMatchRules which don't specify an interface */
DBusList *rules_without_iface;
};
struct BusMatchmaker
{
int refcount;
/* Pools of rules, grouped by the type of message they match. 0
* (DBUS_MESSAGE_TYPE_INVALID) represents rules that do not specify a message
* type.
*/
RulePool rules_by_type[DBUS_NUM_MESSAGE_TYPES];
};
static void
rule_list_free (DBusList **rules)
{
while (*rules != NULL)
{
BusMatchRule *rule;
rule = (*rules)->data;
bus_match_rule_unref (rule);
_dbus_list_remove_link (rules, *rules);
}
}
static void
rule_list_ptr_free (DBusList **list)
{
/* We have to cope with NULL because the hash table frees the "existing"
* value (which is NULL) when creating a new table entry...
*/
if (list != NULL)
{
rule_list_free (list);
dbus_free (list);
}
}
BusMatchmaker*
bus_matchmaker_new (void)
{
BusMatchmaker *matchmaker;
int i;
matchmaker = dbus_new0 (BusMatchmaker, 1);
if (matchmaker == NULL)
return NULL;
matchmaker->refcount = 1;
for (i = DBUS_MESSAGE_TYPE_INVALID; i < DBUS_NUM_MESSAGE_TYPES; i++)
{
RulePool *p = matchmaker->rules_by_type + i;
p->rules_by_iface = _dbus_hash_table_new (DBUS_HASH_STRING,
dbus_free, (DBusFreeFunction) rule_list_ptr_free);
if (p->rules_by_iface == NULL)
goto nomem;
}
return matchmaker;
nomem:
for (i = DBUS_MESSAGE_TYPE_INVALID; i < DBUS_NUM_MESSAGE_TYPES; i++)
{
RulePool *p = matchmaker->rules_by_type + i;
if (p->rules_by_iface == NULL)
break;
else
_dbus_hash_table_unref (p->rules_by_iface);
}
dbus_free (matchmaker);
return NULL;
}
static DBusList **
bus_matchmaker_get_rules (BusMatchmaker *matchmaker,
int message_type,
const char *interface,
dbus_bool_t create)
{
RulePool *p;
_dbus_assert (message_type >= 0);
_dbus_assert (message_type < DBUS_NUM_MESSAGE_TYPES);
_dbus_verbose ("Looking up rules for message_type %d, interface %s\n",
message_type,
interface != NULL ? interface : "<null>");
p = matchmaker->rules_by_type + message_type;
if (interface == NULL)
{
return &p->rules_without_iface;
}
else
{
DBusList **list;
list = _dbus_hash_table_lookup_string (p->rules_by_iface, interface);
if (list == NULL && create)
{
char *dupped_interface;
list = dbus_new0 (DBusList *, 1);
if (list == NULL)
return NULL;
dupped_interface = _dbus_strdup (interface);
if (dupped_interface == NULL)
{
dbus_free (list);
return NULL;
}
_dbus_verbose ("Adding list for type %d, iface %s\n", message_type,
interface);
if (!_dbus_hash_table_insert_string (p->rules_by_iface,
dupped_interface, list))
{
dbus_free (list);
dbus_free (dupped_interface);
return NULL;
}
}
return list;
}
}
static void
bus_matchmaker_gc_rules (BusMatchmaker *matchmaker,
int message_type,
const char *interface,
DBusList **rules)
{
RulePool *p;
if (interface == NULL)
return;
if (*rules != NULL)
return;
_dbus_verbose ("GCing HT entry for message_type %u, interface %s\n",
message_type, interface);
p = matchmaker->rules_by_type + message_type;
_dbus_assert (_dbus_hash_table_lookup_string (p->rules_by_iface, interface)
== rules);
_dbus_hash_table_remove_string (p->rules_by_iface, interface);
}
BusMatchmaker *
bus_matchmaker_ref (BusMatchmaker *matchmaker)
{
_dbus_assert (matchmaker->refcount > 0);
matchmaker->refcount += 1;
return matchmaker;
}
void
bus_matchmaker_unref (BusMatchmaker *matchmaker)
{
_dbus_assert (matchmaker->refcount > 0);
matchmaker->refcount -= 1;
if (matchmaker->refcount == 0)
{
int i;
for (i = DBUS_MESSAGE_TYPE_INVALID; i < DBUS_NUM_MESSAGE_TYPES; i++)
{
RulePool *p = matchmaker->rules_by_type + i;
_dbus_hash_table_unref (p->rules_by_iface);
rule_list_free (&p->rules_without_iface);
}
dbus_free (matchmaker);
}
}
/* The rule can't be modified after it's added. */
dbus_bool_t
bus_matchmaker_add_rule (BusMatchmaker *matchmaker,
BusMatchRule *rule)
{
DBusList **rules;
_dbus_assert (bus_connection_is_active (rule->matches_go_to));
_dbus_verbose ("Adding rule with message_type %d, interface %s\n",
rule->message_type,
rule->interface != NULL ? rule->interface : "<null>");
rules = bus_matchmaker_get_rules (matchmaker, rule->message_type,
rule->interface, TRUE);
if (rules == NULL)
return FALSE;
if (!_dbus_list_append (rules, rule))
return FALSE;
if (!bus_connection_add_match_rule (rule->matches_go_to, rule))
{
_dbus_list_remove_last (rules, rule);
bus_matchmaker_gc_rules (matchmaker, rule->message_type,
rule->interface, rules);
return FALSE;
}
bus_match_rule_ref (rule);
#ifdef DBUS_ENABLE_VERBOSE_MODE
{
char *s = match_rule_to_string (rule);
_dbus_verbose ("Added match rule %s to connection %p\n",
s, rule->matches_go_to);
dbus_free (s);
}
#endif
return TRUE;
}
static dbus_bool_t
match_rule_equal (BusMatchRule *a,
BusMatchRule *b)
{
if (a->flags != b->flags)
return FALSE;
if (a->matches_go_to != b->matches_go_to)
return FALSE;
if ((a->flags & BUS_MATCH_MESSAGE_TYPE) &&
a->message_type != b->message_type)
return FALSE;
if ((a->flags & BUS_MATCH_MEMBER) &&
strcmp (a->member, b->member) != 0)
return FALSE;
if ((a->flags & BUS_MATCH_PATH) &&
strcmp (a->path, b->path) != 0)
return FALSE;
if ((a->flags & BUS_MATCH_INTERFACE) &&
strcmp (a->interface, b->interface) != 0)
return FALSE;
if ((a->flags & BUS_MATCH_SENDER) &&
strcmp (a->sender, b->sender) != 0)
return FALSE;
if ((a->flags & BUS_MATCH_DESTINATION) &&
strcmp (a->destination, b->destination) != 0)
return FALSE;
/* we already compared the value of flags, and
* BUS_MATCH_CLIENT_IS_EAVESDROPPING does not have another struct member */
if (a->flags & BUS_MATCH_ARGS)
{
int i;
if (a->args_len != b->args_len)
return FALSE;
i = 0;
while (i < a->args_len)
{
int length;
if ((a->args[i] != NULL) != (b->args[i] != NULL))
return FALSE;
if (a->arg_lens[i] != b->arg_lens[i])
return FALSE;
length = a->arg_lens[i] & ~BUS_MATCH_ARG_FLAGS;
if (a->args[i] != NULL)
{
_dbus_assert (b->args[i] != NULL);
if (memcmp (a->args[i], b->args[i], length) != 0)
return FALSE;
}
++i;
}
}
return TRUE;
}
static void
bus_matchmaker_remove_rule_link (DBusList **rules,
DBusList *link)
{
BusMatchRule *rule = link->data;
bus_connection_remove_match_rule (rule->matches_go_to, rule);
_dbus_list_remove_link (rules, link);
#ifdef DBUS_ENABLE_VERBOSE_MODE
{
char *s = match_rule_to_string (rule);
_dbus_verbose ("Removed match rule %s for connection %p\n",
s, rule->matches_go_to);
dbus_free (s);
}
#endif
bus_match_rule_unref (rule);
}
void
bus_matchmaker_remove_rule (BusMatchmaker *matchmaker,
BusMatchRule *rule)
{
DBusList **rules;
_dbus_verbose ("Removing rule with message_type %d, interface %s\n",
rule->message_type,
rule->interface != NULL ? rule->interface : "<null>");
bus_connection_remove_match_rule (rule->matches_go_to, rule);
rules = bus_matchmaker_get_rules (matchmaker, rule->message_type,
rule->interface, FALSE);
/* We should only be asked to remove a rule by identity right after it was
* added, so there should be a list for it.
*/
_dbus_assert (rules != NULL);
_dbus_list_remove (rules, rule);
bus_matchmaker_gc_rules (matchmaker, rule->message_type, rule->interface,
rules);
#ifdef DBUS_ENABLE_VERBOSE_MODE
{
char *s = match_rule_to_string (rule);
_dbus_verbose ("Removed match rule %s for connection %p\n",
s, rule->matches_go_to);
dbus_free (s);
}
#endif
bus_match_rule_unref (rule);
}
/* Remove a single rule which is equal to the given rule by value */
dbus_bool_t
bus_matchmaker_remove_rule_by_value (BusMatchmaker *matchmaker,
BusMatchRule *value,
DBusError *error)
{
DBusList **rules;
DBusList *link = NULL;
_dbus_verbose ("Removing rule by value with message_type %d, interface %s\n",
value->message_type,
value->interface != NULL ? value->interface : "<null>");
rules = bus_matchmaker_get_rules (matchmaker, value->message_type,
value->interface, FALSE);
if (rules != NULL)
{
/* we traverse backward because bus_connection_remove_match_rule()
* removes the most-recently-added rule
*/
link = _dbus_list_get_last_link (rules);
while (link != NULL)
{
BusMatchRule *rule;
DBusList *prev;
rule = link->data;
prev = _dbus_list_get_prev_link (rules, link);
if (match_rule_equal (rule, value))
{
bus_matchmaker_remove_rule_link (rules, link);
break;
}
link = prev;
}
}
if (link == NULL)
{
dbus_set_error (error, DBUS_ERROR_MATCH_RULE_NOT_FOUND,
"The given match rule wasn't found and can't be removed");
return FALSE;
}
bus_matchmaker_gc_rules (matchmaker, value->message_type, value->interface,
rules);
return TRUE;
}
static void
rule_list_remove_by_connection (DBusList **rules,
DBusConnection *connection)
{
DBusList *link;
link = _dbus_list_get_first_link (rules);
while (link != NULL)
{
BusMatchRule *rule;
DBusList *next;
rule = link->data;
next = _dbus_list_get_next_link (rules, link);
if (rule->matches_go_to == connection)
{
bus_matchmaker_remove_rule_link (rules, link);
}
else if (((rule->flags & BUS_MATCH_SENDER) && *rule->sender == ':') ||
((rule->flags & BUS_MATCH_DESTINATION) && *rule->destination == ':'))
{
/* The rule matches to/from a base service, see if it's the
* one being disconnected, since we know this service name
* will never be recycled.
*/
const char *name;
name = bus_connection_get_name (connection);
_dbus_assert (name != NULL); /* because we're an active connection */
if (((rule->flags & BUS_MATCH_SENDER) &&
strcmp (rule->sender, name) == 0) ||
((rule->flags & BUS_MATCH_DESTINATION) &&
strcmp (rule->destination, name) == 0))
{
bus_matchmaker_remove_rule_link (rules, link);
}
}
link = next;
}
}
void
bus_matchmaker_disconnected (BusMatchmaker *matchmaker,
DBusConnection *connection)
{
int i;
/* FIXME
*
* This scans all match rules on the bus. We could avoid that
* for the rules belonging to the connection, since we keep
* a list of those; but for the rules that just refer to
* the connection we'd need to do something more elaborate.
*/
_dbus_assert (bus_connection_is_active (connection));
_dbus_verbose ("Removing all rules for connection %p\n", connection);
for (i = DBUS_MESSAGE_TYPE_INVALID; i < DBUS_NUM_MESSAGE_TYPES; i++)
{
RulePool *p = matchmaker->rules_by_type + i;
DBusHashIter iter;
rule_list_remove_by_connection (&p->rules_without_iface, connection);
_dbus_hash_iter_init (p->rules_by_iface, &iter);
while (_dbus_hash_iter_next (&iter))
{
DBusList **items = _dbus_hash_iter_get_value (&iter);
rule_list_remove_by_connection (items, connection);
if (*items == NULL)
_dbus_hash_iter_remove_entry (&iter);
}
}
}
static dbus_bool_t
connection_is_primary_owner (DBusConnection *connection,
const char *service_name)
{
BusService *service;
DBusString str;
BusRegistry *registry;
_dbus_assert (connection != NULL);
registry = bus_connection_get_registry (connection);
_dbus_string_init_const (&str, service_name);
service = bus_registry_lookup (registry, &str);
if (service == NULL)
return FALSE; /* Service doesn't exist so connection can't own it. */
return bus_service_get_primary_owners_connection (service) == connection;
}
static dbus_bool_t
str_has_prefix (const char *str, const char *prefix)
{
size_t prefix_len;
prefix_len = strlen (prefix);
if (strncmp (str, prefix, prefix_len) == 0)
return TRUE;
else
return FALSE;
}
static dbus_bool_t
match_rule_matches (BusMatchRule *rule,
DBusConnection *sender,
DBusConnection *addressed_recipient,
DBusMessage *message,
BusMatchFlags already_matched)
{
dbus_bool_t wants_to_eavesdrop = FALSE;
int flags;
/* All features of the match rule are AND'd together,
* so FALSE if any of them don't match.
*/
/* sender/addressed_recipient of #NULL may mean bus driver,
* or for addressed_recipient may mean a message with no
* specific recipient (i.e. a signal)
*/
/* Don't bother re-matching features we've already checked implicitly. */
flags = rule->flags & (~already_matched);
if (flags & BUS_MATCH_CLIENT_IS_EAVESDROPPING)
wants_to_eavesdrop = TRUE;
if (flags & BUS_MATCH_MESSAGE_TYPE)
{
_dbus_assert (rule->message_type != DBUS_MESSAGE_TYPE_INVALID);
if (rule->message_type != dbus_message_get_type (message))
return FALSE;
}
if (flags & BUS_MATCH_INTERFACE)
{
const char *iface;
_dbus_assert (rule->interface != NULL);
iface = dbus_message_get_interface (message);
if (iface == NULL)
return FALSE;
if (strcmp (iface, rule->interface) != 0)
return FALSE;
}
if (flags & BUS_MATCH_MEMBER)
{
const char *member;
_dbus_assert (rule->member != NULL);
member = dbus_message_get_member (message);
if (member == NULL)
return FALSE;
if (strcmp (member, rule->member) != 0)
return FALSE;
}
if (flags & BUS_MATCH_SENDER)
{
_dbus_assert (rule->sender != NULL);
if (sender == NULL)
{
if (strcmp (rule->sender,
DBUS_SERVICE_DBUS) != 0)
return FALSE;
}
else
{
if (!connection_is_primary_owner (sender, rule->sender))
return FALSE;
}
}
/* Note: this part is relevant for eavesdropper rules:
* Two cases:
* 1) rule has a destination to be matched
* (flag BUS_MATCH_DESTINATION present). Rule will match if:
* - rule->destination matches the addressed_recipient
* AND
* - wants_to_eavesdrop=TRUE
*
* Note: (the case in which addressed_recipient is the actual rule owner
* is handled elsewere in dispatch.c:bus_dispatch_matches().
*
* 2) rule has no destination. Rule will match if:
* - message has no specified destination (ie broadcasts)
* (Note: this will rule out unicast method calls and unicast signals,
* fixing FDO#269748)
* OR
* - wants_to_eavesdrop=TRUE (destination-catch-all situation)
*/
if (flags & BUS_MATCH_DESTINATION)
{
const char *destination;
_dbus_assert (rule->destination != NULL);
destination = dbus_message_get_destination (message);
if (destination == NULL)
/* broadcast, but this rule specified a destination: no match */
return FALSE;
/* rule owner does not intend to eavesdrop: we'll deliver only msgs
* directed to it, NOT MATCHING */
if (!wants_to_eavesdrop)
return FALSE;
if (addressed_recipient == NULL)
{
if (strcmp (rule->destination,
DBUS_SERVICE_DBUS) != 0)
return FALSE;
}
else
{
if (!connection_is_primary_owner (addressed_recipient, rule->destination))
return FALSE;
}
} else { /* no destination in rule */
dbus_bool_t msg_is_broadcast;
_dbus_assert (rule->destination == NULL);
msg_is_broadcast = (dbus_message_get_destination (message) == NULL);
if (!wants_to_eavesdrop && !msg_is_broadcast)
return FALSE;
/* if we are here rule owner intends to eavesdrop
* OR
* message is being broadcasted */
}
if (flags & BUS_MATCH_PATH)
{
const char *path;
_dbus_assert (rule->path != NULL);
path = dbus_message_get_path (message);
if (path == NULL)
return FALSE;
if (strcmp (path, rule->path) != 0)
return FALSE;
}
if (flags & BUS_MATCH_PATH_NAMESPACE)
{
const char *path;
int len;
_dbus_assert (rule->path != NULL);
path = dbus_message_get_path (message);
if (path == NULL)
return FALSE;
if (!str_has_prefix (path, rule->path))
return FALSE;
len = strlen (rule->path);
/* Check that the actual argument is within the expected
* namespace, rather than just starting with that string,
* by checking that the matched prefix is followed by a '/'
* or the end of the path.
*/
if (path[len] != '\0' && path[len] != '/')
return FALSE;
}
if (flags & BUS_MATCH_ARGS)
{
int i;
DBusMessageIter iter;
_dbus_assert (rule->args != NULL);
dbus_message_iter_init (message, &iter);
i = 0;
while (i < rule->args_len)
{
int current_type;
const char *expected_arg;
int expected_length;
dbus_bool_t is_path, is_namespace;
expected_arg = rule->args[i];
expected_length = rule->arg_lens[i] & ~BUS_MATCH_ARG_FLAGS;
is_path = (rule->arg_lens[i] & BUS_MATCH_ARG_IS_PATH) != 0;
is_namespace = (rule->arg_lens[i] & BUS_MATCH_ARG_NAMESPACE) != 0;
current_type = dbus_message_iter_get_arg_type (&iter);
if (expected_arg != NULL)
{
const char *actual_arg;
int actual_length;
if (current_type != DBUS_TYPE_STRING &&
(!is_path || current_type != DBUS_TYPE_OBJECT_PATH))
return FALSE;
actual_arg = NULL;
dbus_message_iter_get_basic (&iter, &actual_arg);
_dbus_assert (actual_arg != NULL);
actual_length = strlen (actual_arg);
if (is_path)
{
if (actual_length < expected_length &&
actual_arg[actual_length - 1] != '/')
return FALSE;
if (expected_length < actual_length &&
expected_arg[expected_length - 1] != '/')
return FALSE;
if (memcmp (actual_arg, expected_arg,
MIN (actual_length, expected_length)) != 0)
return FALSE;
}
else if (is_namespace)
{
if (expected_length > actual_length)
return FALSE;
/* If the actual argument doesn't start with the expected
* namespace, then we don't match.
*/
if (memcmp (expected_arg, actual_arg, expected_length) != 0)
return FALSE;
if (expected_length < actual_length)
{
/* Check that the actual argument is within the expected
* namespace, rather than just starting with that string,
* by checking that the matched prefix ends in a '.'.
*
* This doesn't stop "foo.bar." matching "foo.bar..baz"
* which is an invalid namespace, but at some point the
* daemon can't cover up for broken services.
*/
if (actual_arg[expected_length] != '.')
return FALSE;
}
/* otherwise we had an exact match. */
}
else
{
if (expected_length != actual_length ||
memcmp (expected_arg, actual_arg, expected_length) != 0)
return FALSE;
}
}
if (current_type != DBUS_TYPE_INVALID)
dbus_message_iter_next (&iter);
++i;
}
}
return TRUE;
}
static dbus_bool_t
get_recipients_from_list (DBusList **rules,
DBusConnection *sender,
DBusConnection *addressed_recipient,
DBusMessage *message,
DBusList **recipients_p)
{
DBusList *link;
if (rules == NULL)
return TRUE;
link = _dbus_list_get_first_link (rules);
while (link != NULL)
{
BusMatchRule *rule;
rule = link->data;
#ifdef DBUS_ENABLE_VERBOSE_MODE
{
char *s = match_rule_to_string (rule);
_dbus_verbose ("Checking whether message matches rule %s for connection %p\n",
s, rule->matches_go_to);
dbus_free (s);
}
#endif
if (match_rule_matches (rule,
sender, addressed_recipient, message,
BUS_MATCH_MESSAGE_TYPE | BUS_MATCH_INTERFACE))
{
_dbus_verbose ("Rule matched\n");
/* Append to the list if we haven't already */
if (bus_connection_mark_stamp (rule->matches_go_to))
{
if (!_dbus_list_append (recipients_p, rule->matches_go_to))
return FALSE;
}
#ifdef DBUS_ENABLE_VERBOSE_MODE
else
{
_dbus_verbose ("Connection already receiving this message, so not adding again\n");
}
#endif /* DBUS_ENABLE_VERBOSE_MODE */
}
link = _dbus_list_get_next_link (rules, link);
}
return TRUE;
}
dbus_bool_t
bus_matchmaker_get_recipients (BusMatchmaker *matchmaker,
BusConnections *connections,
DBusConnection *sender,
DBusConnection *addressed_recipient,
DBusMessage *message,
DBusList **recipients_p)
{
int type;
const char *interface;
DBusList **neither, **just_type, **just_iface, **both;
_dbus_assert (*recipients_p == NULL);
/* This avoids sending same message to the same connection twice.
* Purpose of the stamp instead of a bool is to avoid iterating over
* all connections resetting the bool each time.
*/
bus_connections_increment_stamp (connections);
/* addressed_recipient is already receiving the message, don't add to list.
* NULL addressed_recipient means either bus driver, or this is a signal
* and thus lacks a specific addressed_recipient.
*/
if (addressed_recipient != NULL)
bus_connection_mark_stamp (addressed_recipient);
type = dbus_message_get_type (message);
interface = dbus_message_get_interface (message);
neither = bus_matchmaker_get_rules (matchmaker, DBUS_MESSAGE_TYPE_INVALID,
NULL, FALSE);
just_type = just_iface = both = NULL;
if (interface != NULL)
just_iface = bus_matchmaker_get_rules (matchmaker,
DBUS_MESSAGE_TYPE_INVALID, interface, FALSE);
if (type > DBUS_MESSAGE_TYPE_INVALID && type < DBUS_NUM_MESSAGE_TYPES)
{
just_type = bus_matchmaker_get_rules (matchmaker, type, NULL, FALSE);
if (interface != NULL)
both = bus_matchmaker_get_rules (matchmaker, type, interface, FALSE);
}
if (!(get_recipients_from_list (neither, sender, addressed_recipient,
message, recipients_p) &&
get_recipients_from_list (just_iface, sender, addressed_recipient,
message, recipients_p) &&
get_recipients_from_list (just_type, sender, addressed_recipient,
message, recipients_p) &&
get_recipients_from_list (both, sender, addressed_recipient,
message, recipients_p)))
{
_dbus_list_clear (recipients_p);
return FALSE;
}
return TRUE;
}
#ifdef DBUS_BUILD_TESTS
#include "test.h"
#include <stdlib.h>
static BusMatchRule*
check_parse (dbus_bool_t should_succeed,
const char *text)
{
BusMatchRule *rule;
DBusString str;
DBusError error;
dbus_error_init (&error);
_dbus_string_init_const (&str, text);
rule = bus_match_rule_parse (NULL, &str, &error);
if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
{
dbus_error_free (&error);
return NULL;
}
if (should_succeed && rule == NULL)
{
_dbus_warn ("Failed to parse: %s: %s: \"%s\"\n",
error.name, error.message,
_dbus_string_get_const_data (&str));
exit (1);
}
if (!should_succeed && rule != NULL)
{
_dbus_warn ("Failed to fail to parse: \"%s\"\n",
_dbus_string_get_const_data (&str));
exit (1);
}
dbus_error_free (&error);
return rule;
}
static void
assert_large_rule (BusMatchRule *rule)
{
_dbus_assert (rule->flags & BUS_MATCH_MESSAGE_TYPE);
_dbus_assert (rule->flags & BUS_MATCH_SENDER);
_dbus_assert (rule->flags & BUS_MATCH_INTERFACE);
_dbus_assert (rule->flags & BUS_MATCH_MEMBER);
_dbus_assert (rule->flags & BUS_MATCH_DESTINATION);
_dbus_assert (rule->flags & BUS_MATCH_PATH);
_dbus_assert (rule->message_type == DBUS_MESSAGE_TYPE_SIGNAL);
_dbus_assert (rule->interface != NULL);
_dbus_assert (rule->member != NULL);
_dbus_assert (rule->sender != NULL);
_dbus_assert (rule->destination != NULL);
_dbus_assert (rule->path != NULL);
_dbus_assert (strcmp (rule->interface, "org.freedesktop.DBusInterface") == 0);
_dbus_assert (strcmp (rule->sender, "org.freedesktop.DBusSender") == 0);
_dbus_assert (strcmp (rule->member, "Foo") == 0);
_dbus_assert (strcmp (rule->path, "/bar/foo") == 0);
_dbus_assert (strcmp (rule->destination, ":452345.34") == 0);
}
static dbus_bool_t
test_parsing (void *data)
{
BusMatchRule *rule;
rule = check_parse (TRUE, "type='signal',sender='org.freedesktop.DBusSender',interface='org.freedesktop.DBusInterface',member='Foo',path='/bar/foo',destination=':452345.34'");
if (rule != NULL)
{
assert_large_rule (rule);
bus_match_rule_unref (rule);
}
/* With extra whitespace and useless quotes */
rule = check_parse (TRUE, " type='signal', \tsender='org.freedes''ktop.DBusSender', interface='org.freedesktop.DBusInterface''''', \tmember='Foo',path='/bar/foo',destination=':452345.34'''''");
if (rule != NULL)
{
assert_large_rule (rule);
bus_match_rule_unref (rule);
}
/* A simple signal connection */
rule = check_parse (TRUE, "type='signal',path='/foo',interface='org.Bar'");
if (rule != NULL)
{
_dbus_assert (rule->flags & BUS_MATCH_MESSAGE_TYPE);
_dbus_assert (rule->flags & BUS_MATCH_INTERFACE);
_dbus_assert (rule->flags & BUS_MATCH_PATH);
_dbus_assert (rule->message_type == DBUS_MESSAGE_TYPE_SIGNAL);
_dbus_assert (rule->interface != NULL);
_dbus_assert (rule->path != NULL);
_dbus_assert (strcmp (rule->interface, "org.Bar") == 0);
_dbus_assert (strcmp (rule->path, "/foo") == 0);
bus_match_rule_unref (rule);
}
/* argN */
rule = check_parse (TRUE, "arg0='foo'");
if (rule != NULL)
{
_dbus_assert (rule->flags == BUS_MATCH_ARGS);
_dbus_assert (rule->args != NULL);
_dbus_assert (rule->args_len == 1);
_dbus_assert (rule->args[0] != NULL);
_dbus_assert (rule->args[1] == NULL);
_dbus_assert (strcmp (rule->args[0], "foo") == 0);
bus_match_rule_unref (rule);
}
rule = check_parse (TRUE, "arg1='foo'");
if (rule != NULL)
{
_dbus_assert (rule->flags == BUS_MATCH_ARGS);
_dbus_assert (rule->args != NULL);
_dbus_assert (rule->args_len == 2);
_dbus_assert (rule->args[0] == NULL);
_dbus_assert (rule->args[1] != NULL);
_dbus_assert (rule->args[2] == NULL);
_dbus_assert (strcmp (rule->args[1], "foo") == 0);
bus_match_rule_unref (rule);
}
rule = check_parse (TRUE, "arg2='foo'");
if (rule != NULL)
{
_dbus_assert (rule->flags == BUS_MATCH_ARGS);
_dbus_assert (rule->args != NULL);
_dbus_assert (rule->args_len == 3);
_dbus_assert (rule->args[0] == NULL);
_dbus_assert (rule->args[1] == NULL);
_dbus_assert (rule->args[2] != NULL);
_dbus_assert (rule->args[3] == NULL);
_dbus_assert (strcmp (rule->args[2], "foo") == 0);
bus_match_rule_unref (rule);
}
rule = check_parse (TRUE, "arg40='foo'");
if (rule != NULL)
{
_dbus_assert (rule->flags == BUS_MATCH_ARGS);
_dbus_assert (rule->args != NULL);
_dbus_assert (rule->args_len == 41);
_dbus_assert (rule->args[0] == NULL);
_dbus_assert (rule->args[1] == NULL);
_dbus_assert (rule->args[40] != NULL);
_dbus_assert (rule->args[41] == NULL);
_dbus_assert (strcmp (rule->args[40], "foo") == 0);
bus_match_rule_unref (rule);
}
rule = check_parse (TRUE, "arg63='foo'");
if (rule != NULL)
{
_dbus_assert (rule->flags == BUS_MATCH_ARGS);
_dbus_assert (rule->args != NULL);
_dbus_assert (rule->args_len == 64);
_dbus_assert (rule->args[0] == NULL);
_dbus_assert (rule->args[1] == NULL);
_dbus_assert (rule->args[63] != NULL);
_dbus_assert (rule->args[64] == NULL);
_dbus_assert (strcmp (rule->args[63], "foo") == 0);
bus_match_rule_unref (rule);
}
rule = check_parse (TRUE, "arg7path='/foo'");
if (rule != NULL)
{
_dbus_assert (rule->flags = BUS_MATCH_ARGS);
_dbus_assert (rule->args != NULL);
_dbus_assert (rule->args_len == 8);
_dbus_assert (rule->args[7] != NULL);
_dbus_assert (rule->args[8] == NULL);
_dbus_assert (strcmp (rule->args[7], "/foo") == 0);
_dbus_assert ((rule->arg_lens[7] & BUS_MATCH_ARG_IS_PATH)
== BUS_MATCH_ARG_IS_PATH);
bus_match_rule_unref (rule);
}
/* Arg 0 namespace matches */
rule = check_parse (TRUE, "arg0namespace='foo'");
if (rule != NULL)
{
_dbus_assert (rule->flags == BUS_MATCH_ARGS);
_dbus_assert (rule->args != NULL);
_dbus_assert (rule->args_len == 1);
_dbus_assert (strcmp (rule->args[0], "foo") == 0);
_dbus_assert ((rule->arg_lens[0] & BUS_MATCH_ARG_NAMESPACE)
== BUS_MATCH_ARG_NAMESPACE);
bus_match_rule_unref (rule);
}
rule = check_parse (TRUE, "arg0namespace='foo.bar'");
if (rule != NULL)
{
_dbus_assert (rule->flags == BUS_MATCH_ARGS);
_dbus_assert (rule->args != NULL);
_dbus_assert (rule->args_len == 1);
_dbus_assert (strcmp (rule->args[0], "foo.bar") == 0);
_dbus_assert ((rule->arg_lens[0] & BUS_MATCH_ARG_NAMESPACE)
== BUS_MATCH_ARG_NAMESPACE);
bus_match_rule_unref (rule);
}
/* Only arg0namespace is supported. */
rule = check_parse (FALSE, "arg1namespace='foo'");
_dbus_assert (rule == NULL);
/* An empty string isn't a valid namespace prefix (you should just not
* specify this key at all).
*/
rule = check_parse (FALSE, "arg0namespace=''");
_dbus_assert (rule == NULL);
/* Trailing periods aren't allowed (earlier versions of the arg0namespace
* spec allowed a single trailing period, which altered the semantics) */
rule = check_parse (FALSE, "arg0namespace='foo.'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "arg0namespace='foo.bar.'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "arg0namespace='foo..'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "arg0namespace='foo.bar..'");
_dbus_assert (rule == NULL);
/* Too-large argN */
rule = check_parse (FALSE, "arg300='foo'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "arg64='foo'");
_dbus_assert (rule == NULL);
/* No N in argN */
rule = check_parse (FALSE, "arg='foo'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "argv='foo'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "arg3junk='foo'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "argument='foo'");
_dbus_assert (rule == NULL);
/* Reject duplicates */
rule = check_parse (FALSE, "type='signal',type='method_call'");
_dbus_assert (rule == NULL);
rule = check_parse (TRUE, "path_namespace='/foo/bar'");
if (rule != NULL)
{
_dbus_assert (rule->flags == BUS_MATCH_PATH_NAMESPACE);
_dbus_assert (rule->path != NULL);
_dbus_assert (strcmp (rule->path, "/foo/bar") == 0);
bus_match_rule_unref (rule);
}
/* Almost a duplicate */
rule = check_parse (FALSE, "path='/foo',path_namespace='/foo'");
_dbus_assert (rule == NULL);
/* Trailing / was supported in the initial proposal, but now isn't */
rule = check_parse (FALSE, "path_namespace='/foo/'");
_dbus_assert (rule == NULL);
/* Duplicates with the argN code */
rule = check_parse (FALSE, "arg0='foo',arg0='bar'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "arg3='foo',arg3='bar'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "arg30='foo',arg30='bar'");
_dbus_assert (rule == NULL);
/* Reject broken keys */
rule = check_parse (FALSE, "blah='signal'");
_dbus_assert (rule == NULL);
/* Reject broken values */
rule = check_parse (FALSE, "type='chouin'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "interface='abc@def++'");
_dbus_assert (rule == NULL);
rule = check_parse (FALSE, "service='youpi'");
_dbus_assert (rule == NULL);
/* Allow empty rule */
rule = check_parse (TRUE, "");
if (rule != NULL)
{
_dbus_assert (rule->flags == 0);
bus_match_rule_unref (rule);
}
/* All-whitespace rule is the same as empty */
rule = check_parse (TRUE, " \t");
if (rule != NULL)
{
_dbus_assert (rule->flags == 0);
bus_match_rule_unref (rule);
}
/* But with non-whitespace chars and no =value, it's not OK */
rule = check_parse (FALSE, "type");
_dbus_assert (rule == NULL);
return TRUE;
}
static struct {
const char *first;
const char *second;
} equality_tests[] = {
{ "type='signal'", "type='signal'" },
{ "type='signal',interface='foo.bar'", "interface='foo.bar',type='signal'" },
{ "type='signal',member='bar'", "member='bar',type='signal'" },
{ "type='method_call',sender=':1.0'", "sender=':1.0',type='method_call'" },
{ "type='method_call',destination=':1.0'", "destination=':1.0',type='method_call'" },
{ "type='method_call',path='/foo/bar'", "path='/foo/bar',type='method_call'" },
{ "type='method_call',arg0='blah'", "arg0='blah',type='method_call'" },
{ "type='method_call',arg0='boo'", "arg0='boo',type='method_call'" },
{ "type='method_call',arg0='blah',arg1='baz'", "arg0='blah',arg1='baz',type='method_call'" },
{ "type='method_call',arg3='foosh'", "arg3='foosh',type='method_call'" },
{ "arg3='fool'", "arg3='fool'" },
{ "arg0namespace='fool'", "arg0namespace='fool'" },
{ "member='food'", "member='food'" }
};
static void
test_equality (void)
{
int i;
i = 0;
while (i < _DBUS_N_ELEMENTS (equality_tests))
{
BusMatchRule *first;
BusMatchRule *second;
int j;
first = check_parse (TRUE, equality_tests[i].first);
_dbus_assert (first != NULL);
second = check_parse (TRUE, equality_tests[i].second);
_dbus_assert (second != NULL);
if (!match_rule_equal (first, second))
{
_dbus_warn ("rule %s and %s should have been equal\n",
equality_tests[i].first,
equality_tests[i].second);
exit (1);
}
bus_match_rule_unref (second);
/* Check that the rule is not equal to any of the
* others besides its pair match
*/
j = 0;
while (j < _DBUS_N_ELEMENTS (equality_tests))
{
if (i != j)
{
second = check_parse (TRUE, equality_tests[j].second);
if (match_rule_equal (first, second))
{
_dbus_warn ("rule %s and %s should not have been equal\n",
equality_tests[i].first,
equality_tests[j].second);
exit (1);
}
bus_match_rule_unref (second);
}
++j;
}
bus_match_rule_unref (first);
++i;
}
}
static const char*
should_match_message_1[] = {
"type='signal'",
"member='Frobated'",
"arg0='foobar'",
"type='signal',member='Frobated'",
"type='signal',member='Frobated',arg0='foobar'",
"member='Frobated',arg0='foobar'",
"type='signal',arg0='foobar'",
/* The definition of argXpath matches says: "As with normal argument matches,
* if the argument is exactly equal to the string given in the match rule
* then the rule is satisfied." So this should match (even though the
* argument is not a valid path)!
*/
"arg0path='foobar'",
"arg0namespace='foobar'",
NULL
};
static const char*
should_not_match_message_1[] = {
"type='method_call'",
"type='error'",
"type='method_return'",
"type='signal',member='Oopsed'",
"arg0='blah'",
"arg1='foobar'",
"arg2='foobar'",
"arg3='foobar'",
"arg0='3'",
"arg1='3'",
"arg0='foobar',arg1='abcdef'",
"arg0='foobar',arg1='abcdef',arg2='abcdefghi',arg3='abcdefghi',arg4='abcdefghi'",
"arg0='foobar',arg1='abcdef',arg4='abcdefghi',arg3='abcdefghi',arg2='abcdefghi'",
"arg0path='foo'",
"arg0path='foobar/'",
"arg1path='3'",
"arg0namespace='foo'",
"arg0namespace='foo',arg1='abcdef'",
"arg0namespace='moo'",
NULL
};
#define EXAMPLE_NAME "com.example.backend.foo"
static const char *
should_match_message_2[] = {
/* EXAMPLE_NAME is in all of these namespaces */
"arg0namespace='com.example.backend'",
"arg0namespace='com.example'",
"arg0namespace='com'",
/* If the client specifies the name exactly, with no trailing period, then
* it should match.
*/
"arg0namespace='com.example.backend.foo'",
NULL
};
static const char *
should_not_match_message_2[] = {
/* These are not even prefixes */
"arg0namespace='com.example.backend.foo.bar'",
"arg0namespace='com.example.backend.foobar'",
/* These are prefixes, but they're not parent namespaces. */
"arg0namespace='com.example.backend.fo'",
"arg0namespace='com.example.backen'",
"arg0namespace='com.exampl'",
"arg0namespace='co'",
NULL
};
static void
check_matches (dbus_bool_t expected_to_match,
int number,
DBusMessage *message,
const char *rule_text)
{
BusMatchRule *rule;
dbus_bool_t matched;
rule = check_parse (TRUE, rule_text);
_dbus_assert (rule != NULL);
/* We can't test sender/destination rules since we pass NULL here */
matched = match_rule_matches (rule, NULL, NULL, message, 0);
if (matched != expected_to_match)
{
_dbus_warn ("Expected rule %s to %s message %d, failed\n",
rule_text, expected_to_match ?
"match" : "not match", number);
exit (1);
}
bus_match_rule_unref (rule);
}
static void
check_matching (DBusMessage *message,
int number,
const char **should_match,
const char **should_not_match)
{
int i;
i = 0;
while (should_match[i] != NULL)
{
check_matches (TRUE, number, message, should_match[i]);
++i;
}
i = 0;
while (should_not_match[i] != NULL)
{
check_matches (FALSE, number, message, should_not_match[i]);
++i;
}
}
static void
test_matching (void)
{
DBusMessage *message1, *message2;
const char *v_STRING;
dbus_int32_t v_INT32;
message1 = dbus_message_new (DBUS_MESSAGE_TYPE_SIGNAL);
_dbus_assert (message1 != NULL);
if (!dbus_message_set_member (message1, "Frobated"))
_dbus_assert_not_reached ("oom");
v_STRING = "foobar";
v_INT32 = 3;
if (!dbus_message_append_args (message1,
DBUS_TYPE_STRING, &v_STRING,
DBUS_TYPE_INT32, &v_INT32,
NULL))
_dbus_assert_not_reached ("oom");
check_matching (message1, 1,
should_match_message_1,
should_not_match_message_1);
dbus_message_unref (message1);
message2 = dbus_message_new (DBUS_MESSAGE_TYPE_SIGNAL);
_dbus_assert (message2 != NULL);
if (!dbus_message_set_member (message2, "NameOwnerChanged"))
_dbus_assert_not_reached ("oom");
/* Obviously this isn't really a NameOwnerChanged signal. */
v_STRING = EXAMPLE_NAME;
if (!dbus_message_append_args (message2,
DBUS_TYPE_STRING, &v_STRING,
NULL))
_dbus_assert_not_reached ("oom");
check_matching (message2, 2,
should_match_message_2,
should_not_match_message_2);
dbus_message_unref (message2);
}
#define PATH_MATCH_RULE "arg0path='/aa/bb/'"
/* This is a list of paths that should be matched by PATH_MATCH_RULE, taken
* from the specification. Notice that not all of them are actually legal D-Bus
* paths.
*
* The author of this test takes no responsibility for the semantics of
* this match rule key.
*/
static const char *paths_that_should_be_matched[] = {
"/aa/",
"/aa/bb/",
"/aa/bb/cc/",
#define FIRST_VALID_PATH_WHICH_SHOULD_MATCH 3
"/",
"/aa/bb/cc",
NULL
};
/* These paths should not be matched by PATH_MATCH_RULE. */
static const char *paths_that_should_not_be_matched[] = {
"/aa/b",
"/aa",
/* or even... */
"/aa/bb",
NULL
};
static void
test_path_match (int type,
const char *path,
const char *rule_text,
BusMatchRule *rule,
dbus_bool_t should_match)
{
DBusMessage *message = dbus_message_new (DBUS_MESSAGE_TYPE_SIGNAL);
dbus_bool_t matched;
_dbus_assert (message != NULL);
if (!dbus_message_set_member (message, "Foo"))
_dbus_assert_not_reached ("oom");
if (!dbus_message_append_args (message,
type, &path,
NULL))
_dbus_assert_not_reached ("oom");
matched = match_rule_matches (rule, NULL, NULL, message, 0);
if (matched != should_match)
{
_dbus_warn ("Expected rule %s to %s message "
"with first arg %s of type '%c', failed\n",
rule_text,
should_match ? "match" : "not match",
path,
(char) type);
exit (1);
}
dbus_message_unref (message);
}
static void
test_path_matching (void)
{
BusMatchRule *rule;
const char **s;
rule = check_parse (TRUE, PATH_MATCH_RULE);
_dbus_assert (rule != NULL);
for (s = paths_that_should_be_matched; *s != NULL; s++)
test_path_match (DBUS_TYPE_STRING, *s, PATH_MATCH_RULE, rule, TRUE);
for (s = paths_that_should_be_matched + FIRST_VALID_PATH_WHICH_SHOULD_MATCH;
*s != NULL; s++)
test_path_match (DBUS_TYPE_OBJECT_PATH, *s, PATH_MATCH_RULE, rule, TRUE);
for (s = paths_that_should_not_be_matched; *s != NULL; s++)
{
test_path_match (DBUS_TYPE_STRING, *s, PATH_MATCH_RULE, rule, FALSE);
test_path_match (DBUS_TYPE_OBJECT_PATH, *s, PATH_MATCH_RULE, rule, FALSE);
}
bus_match_rule_unref (rule);
}
static const char*
path_namespace_should_match_message_1[] = {
"type='signal',path_namespace='/foo'",
"type='signal',path_namespace='/foo/TheObjectManager'",
NULL
};
static const char*
path_namespace_should_not_match_message_1[] = {
"type='signal',path_namespace='/bar'",
"type='signal',path_namespace='/bar/TheObjectManager'",
NULL
};
static const char*
path_namespace_should_match_message_2[] = {
"type='signal',path_namespace='/foo/TheObjectManager'",
NULL
};
static const char*
path_namespace_should_not_match_message_2[] = {
NULL
};
static const char*
path_namespace_should_match_message_3[] = {
NULL
};
static const char*
path_namespace_should_not_match_message_3[] = {
"type='signal',path_namespace='/foo/TheObjectManager'",
NULL
};
static void
test_matching_path_namespace (void)
{
DBusMessage *message1;
DBusMessage *message2;
DBusMessage *message3;
message1 = dbus_message_new (DBUS_MESSAGE_TYPE_SIGNAL);
_dbus_assert (message1 != NULL);
if (!dbus_message_set_path (message1, "/foo/TheObjectManager"))
_dbus_assert_not_reached ("oom");
message2 = dbus_message_new (DBUS_MESSAGE_TYPE_SIGNAL);
_dbus_assert (message2 != NULL);
if (!dbus_message_set_path (message2, "/foo/TheObjectManager/child_object"))
_dbus_assert_not_reached ("oom");
message3 = dbus_message_new (DBUS_MESSAGE_TYPE_SIGNAL);
_dbus_assert (message3 != NULL);
if (!dbus_message_set_path (message3, "/foo/TheObjectManagerOther"))
_dbus_assert_not_reached ("oom");
check_matching (message1, 1,
path_namespace_should_match_message_1,
path_namespace_should_not_match_message_1);
check_matching (message2, 2,
path_namespace_should_match_message_2,
path_namespace_should_not_match_message_2);
check_matching (message3, 3,
path_namespace_should_match_message_3,
path_namespace_should_not_match_message_3);
dbus_message_unref (message3);
dbus_message_unref (message2);
dbus_message_unref (message1);
}
dbus_bool_t
bus_signals_test (const DBusString *test_data_dir)
{
BusMatchmaker *matchmaker;
matchmaker = bus_matchmaker_new ();
bus_matchmaker_ref (matchmaker);
bus_matchmaker_unref (matchmaker);
bus_matchmaker_unref (matchmaker);
if (!_dbus_test_oom_handling ("parsing match rules", test_parsing, NULL))
_dbus_assert_not_reached ("Parsing match rules test failed");
test_equality ();
test_matching ();
test_path_matching ();
test_matching_path_namespace ();
return TRUE;
}
#endif /* DBUS_BUILD_TESTS */