sig.h File Reference

#include "status.h"
#include "win32.h"

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Data Structures
struct	signal_info

Macros
#define	SIG_SOURCE_SOFT   0
#define	SIG_SOURCE_HARD   1
#define	SIG_SOURCE_CONNECTION_FAILED   2
#define	IS_SIG(c)   ((c)->sig->signal_received)

Functions
int	parse_signal (const char *signame)
const char *	signal_name (const int sig, const bool upper)
const char *	signal_description (const int signum, const char *sigtext)
void	throw_signal (const int signum)
	Throw a hard signal. More...
void	throw_signal_soft (const int signum, const char *signal_text)
	Throw a soft global signal. More...
void	pre_init_signal_catch (void)
void	post_init_signal_catch (void)
void	restore_signal_state (void)
void	print_signal (const struct signal_info *si, const char *title, int msglevel)
void	print_status (struct context *c, struct status_output *so)
void	remap_signal (struct context *c)
void	signal_restart_status (const struct signal_info *si)
bool	process_signal (struct context *c)
void	register_signal (struct signal_info *si, int sig, const char *text)
	Register a soft signal in the signal_info struct si respecting priority. More...
void	process_explicit_exit_notification_timer_wakeup (struct context *c)
int	signal_reset (struct signal_info *si, int signum)
	Clear the signal if its current value equals signum. More...
static void	halt_non_edge_triggered_signals (void)
static void	get_signal (volatile int *sig)
	Copy the global signal_received (if non-zero) to the passed-in argument sig. More...

Variables
struct signal_info	siginfo_static

Macro Definition Documentation

IS_SIG

#define IS_SIG

(

c

)

((c)->sig->signal_received)

Definition at line 48 of file sig.h.

SIG_SOURCE_CONNECTION_FAILED

#define SIG_SOURCE_CONNECTION_FAILED   2

Definition at line 35 of file sig.h.

SIG_SOURCE_HARD

#define SIG_SOURCE_HARD   1

Definition at line 31 of file sig.h.

SIG_SOURCE_SOFT

#define SIG_SOURCE_SOFT   0

Definition at line 30 of file sig.h.

Function Documentation

get_signal()

static void get_signal ( volatile int *  sig )

inlinestatic

Copy the global signal_received (if non-zero) to the passed-in argument sig.

As the former is volatile, do not assign if sig and &signal_received are the same. Even on windows signal_received is really volatile as it can change if a ctrl-C or ctrl-break is delivered. So use the same logic as above.

Also, on windows always call win32_signal_get to pickup any signals simulated by key-board short cuts or the exit event.

Definition at line 110 of file sig.h.

References siginfo_static, signal_info::signal_received, and win32_signal_get().

Referenced by dco_connect_wait(), io_wait_dowork(), man_check_for_signals(), multi_tcp_process_io(), openvpn_connect(), openvpn_getaddrinfo(), recv_line(), recv_socks_reply(), socket_connect(), socket_listen_accept(), socks_handshake(), and socks_username_password_auth().

halt_non_edge_triggered_signals()

static void halt_non_edge_triggered_signals ( void  )

inlinestatic

Definition at line 92 of file sig.h.

References win32_signal_close().

Referenced by process_explicit_exit_notification_init().

parse_signal()

int parse_signal

(

const char *

signame

)

Definition at line 66 of file sig.c.

References signames, SIZE, signame::upper, and signame::value.

Referenced by man_signal().

post_init_signal_catch()

void post_init_signal_catch

(

void

)

Definition at line 427 of file sig.c.

References CLEAR, signal_mode, and SM_POST_INIT.

Referenced by init_instance_handle_signals(), and restore_signal_state().

pre_init_signal_catch()

void pre_init_signal_catch

(

void

)

Definition at line 398 of file sig.c.

References CLEAR, siginfo_static, signal_mode, signal_reset(), and SM_PRE_INIT.

Referenced by init_instance_handle_signals(), openvpn_main(), and restore_signal_state().

print_signal()

void print_signal	(	const struct signal_info *	si,
		const char *	title,
		int	msglevel
	)

Definition at line 294 of file sig.c.

References ASSERT, msg, SIG_SOURCE_CONNECTION_FAILED, SIG_SOURCE_HARD, SIG_SOURCE_SOFT, signal_name(), signal_info::signal_received, signal_info::signal_text, and signal_info::source.

Referenced by multi_close_instance_on_signal(), and openvpn_main().

print_status()

void print_status	(	struct context *	c,
		struct status_output *	so
	)

Definition at line 484 of file sig.c.

References context::c1, context::c2, counter_format, dco_enabled(), dco_get_peer_stats(), context_2::dco_read_bytes, context_2::dco_write_bytes, gc_free(), gc_new(), context_2::link_read_bytes, context_2::link_read_bytes_auth, context_2::link_write_bytes, context::options, status_flush(), status_printf(), status_reset(), tap_win_getinfo(), time_string(), context_2::tun_read_bytes, context_2::tun_write_bytes, context_1::tuntap, and tuntap_defined().

Referenced by check_status_file(), management_callback_status_p2p(), and process_sigusr2().

process_explicit_exit_notification_timer_wakeup()

void process_explicit_exit_notification_timer_wakeup

(

struct context *

c

)

Definition at line 564 of file sig.c.

References ASSERT, context::c2, cc_exit_notify_enabled(), options::ce, ETT_DEFAULT, event_timeout_clear(), event_timeout_trigger(), connection_entry::explicit_exit_notification, context_2::explicit_exit_notification_interval, context_2::explicit_exit_notification_time_wait, now, OCC_EXIT, context_2::occ_op, context::options, register_signal(), context::sig, and context_2::timeval.

Referenced by process_coarse_timers().

process_signal()

bool process_signal

(

struct context *

c

)

Definition at line 637 of file sig.c.

References process_sigterm(), process_sigusr2(), remap_restart_signals(), context::sig, and signal_info::signal_received.

Referenced by process_signal_p2p().

register_signal()

void register_signal	(	struct signal_info *	si,
		int	signum,
		const char *	signal_text
	)

Register a soft signal in the signal_info struct si respecting priority.

si may be a pointer to the global siginfo_static or a context-specific signal in a multi-instance or a temporary variable.

Definition at line 231 of file sig.c.

References block_async_signals(), D_SIGNAL_DEBUG, msg, SIG_SOURCE_CONNECTION_FAILED, SIG_SOURCE_SOFT, siginfo_static, signal_name(), signal_info::signal_received, signal_info::signal_text, signal_info::source, try_throw_signal(), and unblock_async_signals().

Referenced by check_add_routes(), check_connection_established(), check_dco_key_status(), check_inactivity_timeout(), check_scheduled_exit(), check_server_poll_timeout(), check_session_timeout(), check_tls(), check_tls_errors_co(), check_tls_errors_nco(), close_context(), dco_connect_wait(), do_init_crypto_tls_c1(), establish_http_proxy_passthru(), establish_socks_proxy_passthru(), establish_socks_proxy_udpassoc(), incoming_push_message(), link_socket_init_phase2(), multi_client_generate_tls_keys(), phase2_tcp_server(), process_explicit_exit_notification_timer_wakeup(), process_incoming_link_part1(), process_outgoing_link(), process_received_occ_msg(), read_incoming_link(), read_incoming_tun(), receive_auth_failed(), receive_exit_message(), remap_restart_signals(), remap_signal(), resolve_remote(), send_push_request(), server_pushed_signal(), socket_connect(), and trigger_ping_timeout_signal().

remap_signal()

void remap_signal

(

struct context *

c

)

Definition at line 588 of file sig.c.

References context::options, register_signal(), options::remap_sigusr1, context::sig, signal_info::signal_received, and signal_info::signal_text.

Referenced by init_instance_handle_signals(), multi_close_instance_on_signal(), and process_signal_p2p().

restore_signal_state()

void restore_signal_state

(

void

)

Definition at line 466 of file sig.c.

References post_init_signal_catch(), pre_init_signal_catch(), signal_mode, SM_POST_INIT, and SM_PRE_INIT.

Referenced by possibly_become_daemon().

signal_description()

const char* signal_description	(	const int	signum,
		const char *	sigtext
	)

Definition at line 107 of file sig.c.

References signal_name().

Referenced by do_close_tun().

signal_name()

const char* signal_name	(	const int	sig,
		const bool	upper
	)

Definition at line 93 of file sig.c.

References signame::lower, signames, SIZE, signame::upper, and signame::value.

Referenced by man_signal(), print_signal(), register_signal(), remap_restart_signals(), signal_description(), signal_reset(), signal_restart_status(), throw_signal(), and throw_signal_soft().

signal_reset()

int signal_reset	(	struct signal_info *	si,
		int	signum
	)

Clear the signal if its current value equals signum.

If signum is zero the signal is cleared independent of its current value.

Returns

the current value of the signal.

If signum is zero the signal is cleared independent of its current value. Returns the current value of the signal.

Definition at line 266 of file sig.c.

References block_async_signals(), D_SIGNAL_DEBUG, msg, SIG_SOURCE_SOFT, siginfo_static, signal_name(), signal_info::signal_received, signal_info::signal_text, signal_info::source, and unblock_async_signals().

Referenced by link_socket_init_phase2(), multi_process_signal(), multi_push_restart_schedule_exit(), openvpn_getaddrinfo(), openvpn_main(), pre_init_signal_catch(), process_explicit_exit_notification_init(), and process_sigusr2().

signal_restart_status()

void signal_restart_status

(

const struct signal_info *

si

)

Definition at line 348 of file sig.c.

References management_set_state(), OPENVPN_STATE_EXITING, OPENVPN_STATE_RECONNECTING, signal_name(), signal_info::signal_received, and signal_info::signal_text.

Referenced by openvpn_main().

throw_signal()

void throw_signal

(

const int

signum

)

Throw a hard signal.

Called from management and when windows signals are received through ctrl-c, exit event etc.

Definition at line 177 of file sig.c.

References ASSERT, block_async_signals(), D_SIGNAL_DEBUG, ignored_hard_signals_mask, msg, SIG_SOURCE_HARD, siginfo_static, signal_name(), signal_info::signal_received, try_throw_signal(), and unblock_async_signals().

Referenced by link_socket_init_phase2(), man_connect(), man_signal(), multi_process_timeout(), win32_signal_get(), and win_ctrl_handler().

throw_signal_soft()

void throw_signal_soft	(	const int	signum,
		const char *	signal_text
	)

Throw a soft global signal.

Used to register internally generated signals due to errors that require a restart or exit, or restart requests received from the server. A textual description of the signal may be provided.

Definition at line 206 of file sig.c.

References block_async_signals(), D_SIGNAL_DEBUG, msg, SIG_SOURCE_SOFT, siginfo_static, signal_name(), signal_info::signal_received, signal_info::signal_text, try_throw_signal(), and unblock_async_signals().

Referenced by apply_pull_filter(), do_preresolve(), man_connect(), and man_reset_client_socket().

Variable Documentation

siginfo_static

struct signal_info siginfo_static

Definition at line 45 of file sig.c.

Referenced by get_signal(), link_socket_init_phase2(), openvpn_main(), pre_init_signal_catch(), register_signal(), signal_reset(), throw_signal(), throw_signal_soft(), win32_signal_get(), and win_ctrl_handler().