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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#pragma once
/***
This file is part of systemd.
Copyright 2013 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <pthread.h>
#include "hashmap.h"
#include "prioq.h"
#include "list.h"
#include "util.h"
#include "refcnt.h"
#include "sd-bus.h"
#include "bus-error.h"
#include "bus-match.h"
#include "bus-kernel.h"
struct reply_callback {
sd_bus_message_handler_t callback;
void *userdata;
usec_t timeout;
uint64_t serial;
unsigned prioq_idx;
};
struct filter_callback {
sd_bus_message_handler_t callback;
void *userdata;
unsigned last_iteration;
LIST_FIELDS(struct filter_callback, callbacks);
};
struct object_callback {
sd_bus_message_handler_t callback;
void *userdata;
char *path;
bool is_fallback;
unsigned last_iteration;
};
enum bus_state {
BUS_UNSET,
BUS_OPENING,
BUS_AUTHENTICATING,
BUS_HELLO,
BUS_RUNNING,
BUS_CLOSED
};
static inline bool BUS_IS_OPEN(enum bus_state state) {
return state > BUS_UNSET && state < BUS_CLOSED;
}
enum bus_auth {
_BUS_AUTH_INVALID,
BUS_AUTH_EXTERNAL,
BUS_AUTH_ANONYMOUS
};
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;
enum bus_state state;
int input_fd, output_fd;
int message_version;
bool is_kernel:1;
bool can_fds:1;
bool bus_client:1;
bool ucred_valid:1;
bool is_server:1;
bool anonymous_auth:1;
bool prefer_readv:1;
bool prefer_writev:1;
bool processing:1;
bool match_callbacks_modified:1;
bool filter_callbacks_modified:1;
bool object_callbacks_modified:1;
void *rbuffer;
size_t rbuffer_size;
sd_bus_message **rqueue;
unsigned rqueue_size;
sd_bus_message **wqueue;
unsigned wqueue_size;
size_t windex;
uint64_t serial;
char *unique_name;
struct bus_match_node match_callbacks;
Prioq *reply_callbacks_prioq;
Hashmap *reply_callbacks;
LIST_HEAD(struct filter_callback, filter_callbacks);
Hashmap *object_callbacks;
union {
struct sockaddr sa;
struct sockaddr_un un;
struct sockaddr_in in;
struct sockaddr_in6 in6;
} sockaddr;
socklen_t sockaddr_size;
char *kernel;
sd_id128_t server_id;
char *address;
unsigned address_index;
int last_connect_error;
enum bus_auth auth;
size_t auth_rbegin;
struct iovec auth_iovec[3];
unsigned auth_index;
char *auth_buffer;
usec_t auth_timeout;
struct ucred ucred;
char label[NAME_MAX];
int *fds;
unsigned n_fds;
char *exec_path;
char **exec_argv;
uint64_t hello_serial;
unsigned iteration_counter;
void *kdbus_buffer;
/* 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
* adding something to the memfd cache might happen when a
* message is released, we hence need to protect this bit with
* a mutex. */
pthread_mutex_t memfd_cache_mutex;
struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
unsigned n_memfd_cache;
pid_t original_pid;
uint64_t hello_flags;
};
static inline void bus_unrefp(sd_bus **b) {
sd_bus_unref(*b);
}
#define _cleanup_bus_unref_ __attribute__((cleanup(bus_unrefp)))
#define _cleanup_bus_error_free_ __attribute__((cleanup(sd_bus_error_free)))
#define BUS_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
#define BUS_WQUEUE_MAX 128
#define BUS_RQUEUE_MAX 128
#define BUS_MESSAGE_SIZE_MAX (64*1024*1024)
#define BUS_AUTH_SIZE_MAX (64*1024)
#define BUS_CONTAINER_DEPTH 128
/* Defined by the specification as maximum size of an array in
* bytes */
#define BUS_ARRAY_MAX_SIZE 67108864
#define BUS_FDS_MAX 1024
#define BUS_EXEC_ARGV_MAX 256
bool object_path_is_valid(const char *p);
bool interface_name_is_valid(const char *p);
bool service_name_is_valid(const char *p);
bool member_name_is_valid(const char *p);
bool namespace_complex_pattern(const char *pattern, const char *value);
bool path_complex_pattern(const char *pattern, const char *value);
bool namespace_simple_pattern(const char *pattern, const char *value);
bool path_simple_pattern(const char *pattern, const char *value);
int bus_message_type_from_string(const char *s, uint8_t *u);
const char *bus_message_type_to_string(uint8_t u);
#define error_name_is_valid interface_name_is_valid
int bus_ensure_running(sd_bus *bus);
int bus_start_running(sd_bus *bus);
int bus_next_address(sd_bus *bus);
bool bus_pid_changed(sd_bus *bus);
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