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-rw-r--r--src/core/socket.h182
1 files changed, 182 insertions, 0 deletions
diff --git a/src/core/socket.h b/src/core/socket.h
new file mode 100644
index 0000000..c4e25db
--- /dev/null
+++ b/src/core/socket.h
@@ -0,0 +1,182 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+typedef struct Socket Socket;
+typedef struct SocketPeer SocketPeer;
+
+#include "mount.h"
+#include "service.h"
+#include "socket-util.h"
+#include "unit.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_TYPE_MAX,
+ _SOCKET_TYPE_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;
+ size_t 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 n_refused;
+ 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
+ * to refer to 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_;
+SocketType socket_port_type_from_string(const char *p) _pure_;
+
+DEFINE_CAST(SOCKET, Socket);