Defines
#define	LOCK_PER_CALLBACK_SUBID 1
#define	CALLBACK_LOCK(maj, min) ++_locks[maj][min]
#define	CALLBACK_UNLOCK(maj, min) --_locks[maj][min]
#define	CALLBACK_LOCK_COUNT(maj, min) _locks[maj][min]
Functions
	netsnmp_feature_child_of (callbacks_all, libnetsnmp)
NETSNMP_STATIC_INLINE int	_callback_lock (int major, int minor, const char *warn, int do_assert)
NETSNMP_STATIC_INLINE void	_callback_unlock (int major, int minor)
void	init_callbacks (void)
int	snmp_register_callback (int major, int minor, SNMPCallback new_callback, void arg)
	This function registers a generic callback function.
int	netsnmp_register_callback (int major, int minor, SNMPCallback new_callback, void arg, int priority)
	Register a callback function.
int	snmp_call_callbacks (int major, int minor, void *caller_arg)
	This function calls the callback function for each registered callback of type major and minor.
int	snmp_count_callbacks (int major, int minor)
int	snmp_callback_available (int major, int minor)
int	snmp_unregister_callback (int major, int minor, SNMPCallback target, void arg, int matchargs)
	This function unregisters a specified callback function given a major and minor type.
int	netsnmp_callback_clear_client_arg (void *ptr, int i, int j)
	find and clear client args that match ptr
void	clear_callback (void)
struct snmp_gen_callback *	snmp_callback_list (int major, int minor)

Function Documentation

int netsnmp_callback_clear_client_arg	(	void *	ptr,
		int	i,
		int	j
	)

find and clear client args that match ptr

Parameters:

ptr	pointer to search for
i	callback id to start at
j	callback subid to start at

Definition at line 498 of file callback.c.

int netsnmp_register_callback	(	int	major,
		int	minor,
		SNMPCallback *	new_callback,
		void *	arg,
		int	priority
	)

Register a callback function.

Parameters:

major	Major callback event type.
minor	Minor callback event type.
new_callback	Callback function being registered.
arg	Argument that will be passed to the callback function. Handler invocation priority. When multiple handlers have been registered for the same (major, minor) callback event type, handlers with the numerically lowest priority will be invoked first. Handlers with identical priority are invoked in the order they have been registered.

See also:: snmp_register_callback

Definition at line 260 of file callback.c.

int snmp_call_callbacks	(	int	major,
		int	minor,
		void *	caller_arg
	)

This function calls the callback function for each registered callback of type major and minor.

Parameters:

major	is the SNMP callback major type used
minor	is the SNMP callback minor type used
caller_arg	is a void pointer which is sent in as the callback's serverarg parameter, if needed.

Returns:: Returns SNMPERR_GENERR if major is >= MAX_CALLBACK_IDS or minor is >= MAX_CALLBACK_SUBIDS, otherwise SNMPERR_SUCCESS is returned.

See also:: snmp_register_callback; snmp_unregister_callback

Definition at line 320 of file callback.c.

int snmp_register_callback	(	int	major,
		int	minor,
		SNMPCallback *	new_callback,
		void *	arg
	)

This function registers a generic callback function.

The major and minor values are used to set the new_callback function into a global static multi-dimensional array of type struct snmp_gen_callback. The function makes sure to append this callback function at the end of the link list, snmp_gen_callback->next.

Parameters:

major

is the SNMP callback major type used

SNMP_CALLBACK_LIBRARY

SNMP_CALLBACK_APPLICATION

Parameters:

minor	is the SNMP callback minor type used SNMP_CALLBACK_POST_READ_CONFIG SNMP_CALLBACK_STORE_DATA SNMP_CALLBACK_SHUTDOWN SNMP_CALLBACK_POST_PREMIB_READ_CONFIG SNMP_CALLBACK_LOGGING SNMP_CALLBACK_SESSION_INIT
new_callback	is the callback function that is registered.
arg	when not NULL is a void pointer used whenever new_callback function is exercised. Ownership is transferred to the twodimensional thecallbacks[][] array. The function clear_callback() will deallocate the memory pointed at by calling free().

Returns:

Returns SNMPERR_GENERR if major is >= MAX_CALLBACK_IDS or minor is >= MAX_CALLBACK_SUBIDS or a snmp_gen_callback pointer could not be allocated, otherwise SNMPERR_SUCCESS is returned.

#define MAX_CALLBACK_IDS 2
#define MAX_CALLBACK_SUBIDS 16

See also:: snmp_call_callbacks; snmp_unregister_callback

Definition at line 238 of file callback.c.

int snmp_unregister_callback	(	int	major,
		int	minor,
		SNMPCallback *	target,
		void *	arg,
		int	matchargs
	)

This function unregisters a specified callback function given a major and minor type.

Note: no bound checking on major and minor.

Parameters:

major	is the SNMP callback major type used
minor	is the SNMP callback minor type used
target	is the callback function that will be unregistered.
arg	is a void pointer used for comparison against the registered callback's sc_client_arg variable.
matchargs	is an integer used to bypass the comparison of arg and the callback's sc_client_arg variable only when matchargs is set to 0.

Returns:: Returns the number of callbacks that were unregistered.

See also:: snmp_register_callback; snmp_call_callbacks

set cleanup flag?

Definition at line 442 of file callback.c.

Defines

Functions

Function Documentation