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cebf8b2092
Hi, attached path extends socket configurables with another knob - TCP Congestion Avoidance selection. Linux implements handful of those, useful in various situations. For example, TCP Low Priority may be used by FTP service to gracefully yield bandwidth for more important TCP/IP streams. Until recently TCP_CONGESTION was Linux-specific, recently FreeBSD 8 and OpenSolaris gained compatible support.
148 lines
3.9 KiB
C
148 lines
3.9 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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#ifndef foosockethfoo
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#define foosockethfoo
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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typedef struct Socket Socket;
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#include "manager.h"
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#include "unit.h"
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#include "socket-util.h"
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#include "mount.h"
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typedef enum SocketState {
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SOCKET_DEAD,
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SOCKET_START_PRE,
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SOCKET_START_POST,
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SOCKET_LISTENING,
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SOCKET_RUNNING,
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SOCKET_STOP_PRE,
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SOCKET_STOP_PRE_SIGTERM,
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SOCKET_STOP_PRE_SIGKILL,
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SOCKET_STOP_POST,
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SOCKET_FINAL_SIGTERM,
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SOCKET_FINAL_SIGKILL,
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SOCKET_MAINTENANCE,
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_SOCKET_STATE_MAX,
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_SOCKET_STATE_INVALID = -1
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} SocketState;
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typedef enum SocketExecCommand {
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SOCKET_EXEC_START_PRE,
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SOCKET_EXEC_START_POST,
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SOCKET_EXEC_STOP_PRE,
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SOCKET_EXEC_STOP_POST,
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_SOCKET_EXEC_COMMAND_MAX,
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_SOCKET_EXEC_COMMAND_INVALID = -1
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} SocketExecCommand;
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typedef enum SocketType {
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SOCKET_SOCKET,
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SOCKET_FIFO,
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_SOCKET_FIFO_MAX,
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_SOCKET_FIFO_INVALID = -1
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} SocketType;
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typedef struct SocketPort {
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SocketType type;
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int fd;
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SocketAddress address;
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char *path;
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Watch fd_watch;
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LIST_FIELDS(struct SocketPort, port);
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} SocketPort;
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struct Socket {
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Meta meta;
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LIST_HEAD(SocketPort, ports);
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unsigned backlog;
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usec_t timeout_usec;
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ExecCommand* exec_command[_SOCKET_EXEC_COMMAND_MAX];
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ExecContext exec_context;
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/* For Accept=no sockets refers to the one service we'll
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activate. For Accept=yes sockets is either NULL, or filled
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when the next service we spawn. */
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Service *service;
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SocketState state, deserialized_state;
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ExecCommand* control_command;
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SocketExecCommand control_command_id;
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pid_t control_pid;
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bool accept;
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unsigned n_accepted;
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unsigned n_connections;
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unsigned max_connections;
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bool failure;
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Watch timer_watch;
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/* Socket options */
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bool keep_alive;
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int priority;
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size_t receive_buffer;
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size_t send_buffer;
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int ip_tos;
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int ip_ttl;
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size_t pipe_size;
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int mark;
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bool free_bind;
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char *bind_to_device;
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char *tcp_congestion;
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/* Only for INET6 sockets: issue IPV6_V6ONLY sockopt */
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SocketAddressBindIPv6Only bind_ipv6_only;
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mode_t directory_mode;
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mode_t socket_mode;
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};
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/* Called from the service code when collecting fds */
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int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds);
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/* Called from the service when it shut down */
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void socket_notify_service_dead(Socket *s);
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/* Called from the mount code figure out if a mount is a dependency of
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* any of the sockets of this socket */
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int socket_add_one_mount_link(Socket *s, Mount *m);
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/* Called from the service code when a per-connection service ended */
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void socket_connection_unref(Socket *s);
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extern const UnitVTable socket_vtable;
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const char* socket_state_to_string(SocketState i);
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SocketState socket_state_from_string(const char *s);
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const char* socket_exec_command_to_string(SocketExecCommand i);
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SocketExecCommand socket_exec_command_from_string(const char *s);
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#endif
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