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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
/***
This file is part of systemd.
Copyright 2010 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/>.
***/
typedef struct Socket Socket;
typedef struct SocketPeer SocketPeer;
#include "mount.h"
#include "service.h"
#include "socket-util.h"
typedef enum SocketExecCommand {
SOCKET_EXEC_START_PRE,
SOCKET_EXEC_START_CHOWN,
SOCKET_EXEC_START_POST,
SOCKET_EXEC_STOP_PRE,
SOCKET_EXEC_STOP_POST,
_SOCKET_EXEC_COMMAND_MAX,
_SOCKET_EXEC_COMMAND_INVALID = -1
} SocketExecCommand;
typedef enum SocketType {
SOCKET_SOCKET,
SOCKET_FIFO,
SOCKET_SPECIAL,
SOCKET_MQUEUE,
SOCKET_USB_FUNCTION,
_SOCKET_FIFO_MAX,
_SOCKET_FIFO_INVALID = -1
} SocketType;
typedef enum SocketResult {
SOCKET_SUCCESS,
SOCKET_FAILURE_RESOURCES,
SOCKET_FAILURE_TIMEOUT,
SOCKET_FAILURE_EXIT_CODE,
SOCKET_FAILURE_SIGNAL,
SOCKET_FAILURE_CORE_DUMP,
SOCKET_FAILURE_START_LIMIT_HIT,
SOCKET_FAILURE_TRIGGER_LIMIT_HIT,
SOCKET_FAILURE_SERVICE_START_LIMIT_HIT,
_SOCKET_RESULT_MAX,
_SOCKET_RESULT_INVALID = -1
} SocketResult;
typedef struct SocketPort {
Socket *socket;
SocketType type;
int fd;
int *auxiliary_fds;
int n_auxiliary_fds;
SocketAddress address;
char *path;
sd_event_source *event_source;
LIST_FIELDS(struct SocketPort, port);
} SocketPort;
struct Socket {
Unit meta;
LIST_HEAD(SocketPort, ports);
Set *peers_by_address;
unsigned n_accepted;
unsigned n_connections;
unsigned max_connections;
unsigned max_connections_per_source;
unsigned backlog;
unsigned keep_alive_cnt;
usec_t timeout_usec;
usec_t keep_alive_time;
usec_t keep_alive_interval;
usec_t defer_accept;
ExecCommand* exec_command[_SOCKET_EXEC_COMMAND_MAX];
ExecContext exec_context;
KillContext kill_context;
CGroupContext cgroup_context;
ExecRuntime *exec_runtime;
DynamicCreds dynamic_creds;
/* For Accept=no sockets refers to the one service we'll
activate. For Accept=yes sockets is either NULL, or filled
when the next service we spawn. */
UnitRef service;
SocketState state, deserialized_state;
sd_event_source *timer_event_source;
ExecCommand* control_command;
SocketExecCommand control_command_id;
pid_t control_pid;
mode_t directory_mode;
mode_t socket_mode;
SocketResult result;
char **symlinks;
bool accept;
bool remove_on_stop;
bool writable;
int socket_protocol;
/* Socket options */
bool keep_alive;
bool no_delay;
bool free_bind;
bool transparent;
bool broadcast;
bool pass_cred;
bool pass_sec;
/* Only for INET6 sockets: issue IPV6_V6ONLY sockopt */
SocketAddressBindIPv6Only bind_ipv6_only;
int priority;
int mark;
size_t receive_buffer;
size_t send_buffer;
int ip_tos;
int ip_ttl;
size_t pipe_size;
char *bind_to_device;
char *tcp_congestion;
bool reuse_port;
long mq_maxmsg;
long mq_msgsize;
char *smack;
char *smack_ip_in;
char *smack_ip_out;
bool selinux_context_from_net;
char *user, *group;
char *fdname;
RateLimit trigger_limit;
};
SocketPeer *socket_peer_ref(SocketPeer *p);
SocketPeer *socket_peer_unref(SocketPeer *p);
int socket_acquire_peer(Socket *s, int fd, SocketPeer **p);
DEFINE_TRIVIAL_CLEANUP_FUNC(SocketPeer*, socket_peer_unref);
/* Called from the service code when collecting fds */
int socket_collect_fds(Socket *s, int **fds);
/* Called from the service code when a per-connection service ended */
void socket_connection_unref(Socket *s);
void socket_free_ports(Socket *s);
int socket_instantiate_service(Socket *s);
char *socket_fdname(Socket *s);
extern const UnitVTable socket_vtable;
const char* socket_exec_command_to_string(SocketExecCommand i) _const_;
SocketExecCommand socket_exec_command_from_string(const char *s) _pure_;
const char* socket_result_to_string(SocketResult i) _const_;
SocketResult socket_result_from_string(const char *s) _pure_;
const char* socket_port_type_to_string(SocketPort *p) _pure_;
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