|
|
On latency in event processing network
08-05-2008
|
|
net_hook_register(9F) Kernel Functions for Drivers net_hook_register(9F) NAME
net_hook_register - add a hook to be called in event processing SYNOPSIS
#include <sys/neti.h> net_hook_t net_hook_register(const net_data_t net, hook_t *hook); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). PARAMETERS
net value returned from a successful call to net_protocol_register(). hook pointer to a hook_t structure. DESCRIPTION
The net_hook_register() function uses hooks that allow callbacks to be registered with events that belong to a network protocol. A success- ful call to net_hook_register() requires that a valid handle for a network protocol be provided (the net parameter), along with a hook description that includes a reference to an available event. While it is possible to use the same hook_t structure with multiple calls to net_hook_register(), it is not encouraged. The hook_t structure passed in with this function is described by hook_t(9S). The following describes how this structure is used. h_func Must be non-NULL and represent a function that fits the specified interface. h_name Gives the hook a name that represents its owner. No duplication of h_name among the hooks present for an event is allowed. h_flags Currently unused and must be set to 0. h_hint, h_hintvalue Specify a hint to net_hook_register() on how to insert this hook. If the hint cannot be specified, then an error is returned. h_arg; May take any value that the consumer wishes to have passed back when the hook is activated. RETURN VALUES
If the net_hook_register() function succeeds, 0 is returned. Otherwise, one of the following errors is returned: ENOMEM The system cannot allocate any more memory to support registering this hook. ENXIO A hook cannot be found among the given family of events. EEXIST A hook with the given h_name already exists on that event. ESRCH A before or after dependency cannot be satisfied due to the hook with EBUSY The h_hint field specifies a hint that cannot currently be satisfied because it conflicts with another hook. An example of this might be specifying HH_FIRST or HH_LAST when another hook has already been registered with this value. CONTEXT
The net_hook_register() function may be called from user or kernel context. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ SEE ALSO
net_hook_unregister(9F), hook_t(9S) SunOS 5.11 1 May 2008 net_hook_register(9F)