/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-***/
-
#include <pthread.h>
-#include <sys/socket.h>
#include "sd-bus.h"
#include "hashmap.h"
#include "list.h"
#include "prioq.h"
-#include "refcnt.h"
#include "socket-util.h"
-#include "util.h"
+#include "time-util.h"
+
+/* Note that we use the new /run prefix here (instead of /var/run) since we require them to be aliases and
+ * that way we become independent of /var being mounted */
+#define DEFAULT_SYSTEM_BUS_ADDRESS "unix:path=/run/dbus/system_bus_socket"
+#define DEFAULT_USER_BUS_ADDRESS_FMT "unix:path=%s/bus"
struct reply_callback {
sd_bus_message_handler_t callback;
unsigned last_iteration;
+ /* Don't dispatch this slot with with messages that arrived in any iteration before or at the this
+ * one. We use this to ensure that matches don't apply "retroactively" and thus can confuse the
+ * caller: matches will only match incoming messages from the moment on the match was installed. */
+ uint64_t after;
+
char *match_string;
struct bus_match_node *match_node;
struct node_callback {
struct node *node;
- bool is_fallback;
- sd_bus_message_handler_t callback;
-
+ bool is_fallback:1;
unsigned last_iteration;
+ sd_bus_message_handler_t callback;
+
LIST_FIELDS(struct node_callback, callbacks);
};
struct node_vtable {
struct node *node;
+ bool is_fallback:1;
+ unsigned last_iteration;
+
char *interface;
- bool is_fallback;
const sd_bus_vtable *vtable;
sd_bus_object_find_t find;
- unsigned last_iteration;
-
LIST_FIELDS(struct node_vtable, vtables);
};
struct sd_bus_slot {
unsigned n_ref;
- sd_bus *bus;
- void *userdata;
BusSlotType type:5;
/* Slots can be "floating" or not. If they are not floating (the usual case) then they reference the bus object
bool floating:1;
bool match_added:1;
+
+ sd_bus *bus;
+ void *userdata;
+ sd_bus_destroy_t destroy_callback;
+
char *description;
LIST_FIELDS(sd_bus_slot, slots);
};
struct sd_bus {
- /* We use atomic ref counting here since sd_bus_message
- objects retain references to their originating sd_bus but
- we want to allow them to be processed in a different
- thread. We won't provide full thread safety, but only the
- bare minimum that makes it possible to use sd_bus and
- sd_bus_message objects independently and on different
- threads as long as each object is used only once at the
- same time. */
- RefCount n_ref;
+ unsigned n_ref;
enum bus_state state;
int input_fd, output_fd;
bool accept_fd:1;
bool attach_timestamp:1;
bool connected_signal:1;
+ bool close_on_exit:1;
- int use_memfd;
+ signed int use_memfd:2;
void *rbuffer;
size_t rbuffer_size;
sd_bus_message **rqueue;
- unsigned rqueue_size;
+ size_t rqueue_size;
size_t rqueue_allocated;
sd_bus_message **wqueue;
- unsigned wqueue_size;
+ size_t wqueue_size;
size_t windex;
size_t wqueue_allocated;
uint64_t cookie;
+ uint64_t read_counter; /* A counter for each incoming msg */
char *unique_name;
uint64_t unique_id;
union sockaddr_union sockaddr;
socklen_t sockaddr_size;
- char *machine;
pid_t nspid;
+ char *machine;
sd_id128_t server_id;
int last_connect_error;
enum bus_auth auth;
- size_t auth_rbegin;
- struct iovec auth_iovec[3];
unsigned auth_index;
+ struct iovec auth_iovec[3];
+ size_t auth_rbegin;
char *auth_buffer;
usec_t auth_timeout;
char *exec_path;
char **exec_argv;
- unsigned iteration_counter;
-
/* We do locking around the memfd cache, since we want to
* allow people to process a sd_bus_message in a different
* thread then it was generated on and free it there. Since
pid_t original_pid;
pid_t busexec_pid;
+ unsigned iteration_counter;
+
sd_event_source *input_io_event_source;
sd_event_source *output_io_event_source;
sd_event_source *time_event_source;
sd_event *event;
int event_priority;
+ pid_t tid;
+
sd_bus_message *current_message;
sd_bus_slot *current_slot;
sd_bus_message_handler_t current_handler;
void *current_userdata;
sd_bus **default_bus_ptr;
- pid_t tid;
-
- char *cgroup_root;
char *description;
char *patch_sender;
int *inotify_watches;
size_t n_inotify_watches;
+
+ /* zero means use value specified by $SYSTEMD_BUS_TIMEOUT= environment variable or built-in default */
+ usec_t method_call_timeout;
};
-/* For method calls we time-out at 25s, like in the D-Bus reference implementation */
+/* For method calls we timeout at 25s, like in the D-Bus reference implementation */
#define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
/* For the authentication phase we grant 90s, to provide extra room during boot, when RNGs and such are not filled up
* with enough entropy yet and might delay the boot */
#define BUS_AUTH_TIMEOUT ((usec_t) DEFAULT_TIMEOUT_USEC)
-#define BUS_WQUEUE_MAX (192*1024)
-#define BUS_RQUEUE_MAX (192*1024)
+#define BUS_WQUEUE_MAX (384*1024)
+#define BUS_RQUEUE_MAX (384*1024)
#define BUS_MESSAGE_SIZE_MAX (128*1024*1024)
#define BUS_AUTH_SIZE_MAX (64*1024)
+/* Note that the D-Bus specification states that bus paths shall have no size limit. We enforce here one
+ * anyway, since truly unbounded strings are a security problem. The limit we pick is relatively large however,
+ * to not clash unnecessarily with real-life applications. */
+#define BUS_PATH_SIZE_MAX (64*1024)
#define BUS_CONTAINER_DEPTH 128
-/* Defined by the specification as maximum size of an array in
- * bytes */
+/* Defined by the specification as maximum size of an array in bytes */
#define BUS_ARRAY_MAX_SIZE 67108864
#define BUS_FDS_MAX 1024
bool interface_name_is_valid(const char *p) _pure_;
bool service_name_is_valid(const char *p) _pure_;
-char* service_name_startswith(const char *a, const char *b);
bool member_name_is_valid(const char *p) _pure_;
bool object_path_is_valid(const char *p) _pure_;
char *object_path_startswith(const char *a, const char *b) _pure_;
#define OBJECT_PATH_FOREACH_PREFIX(prefix, path) \
for (char *_slash = ({ strcpy((prefix), (path)); streq((prefix), "/") ? NULL : strrchr((prefix), '/'); }) ; \
- _slash && !(_slash[(_slash) == (prefix)] = 0); \
+ _slash && ((_slash[(_slash) == (prefix)] = 0), true); \
_slash = streq((prefix), "/") ? NULL : strrchr((prefix), '/'))
/* If we are invoking callbacks of a bus object, ensure unreffing the
- * bus from the callback doesn't destroy the object we are working
- * on */
+ * bus from the callback doesn't destroy the object we are working on */
#define BUS_DONT_DESTROY(bus) \
_cleanup_(sd_bus_unrefp) _unused_ sd_bus *_dont_destroy_##bus = sd_bus_ref(bus)
int bus_set_address_system_remote(sd_bus *b, const char *host);
int bus_set_address_system_machine(sd_bus *b, const char *machine);
-int bus_get_root_path(sd_bus *bus);
-
int bus_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error);
#define bus_assert_return(expr, r, error) \
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