Module: NetlinkProcEvent

Defined in:
lib/netlink_proc_event/version.rb,
lib/netlink_proc_event.rb,
lib/netlink_proc_event/libnl.rb

Overview

Copyright © 2015, Christopher Aue <[email protected]>

This file is part of the ruby netlink_proc_event gem. It is subject to the license terms in the LICENSE file found in the top-level directory of this distribution and at github.com/christopheraue/netlink_proc_event.

Defined Under Namespace

Modules: Libnl

Constant Summary collapse

VERSION = 
"0.2.0"

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.logger=(value) ⇒ Object (writeonly)

Sets the attribute logger

Parameters:

  • value —

    the value to set the attribute logger to.



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# File 'lib/netlink_proc_event.rb', line 15

def logger=(value)
  @logger = value
end

Class Method Details

.handle_events ⇒ Object 



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# File 'lib/netlink_proc_event.rb', line 21

def handle_events
  nl_sockaddr = FFI::MemoryPointer.new(32)
  ptr_to_msg_ptr = FFI::MemoryPointer.new(:pointer)

  msg_length = Libnl.nl_recv(nl_socket, nl_sockaddr, ptr_to_msg_ptr, nil)
  msg_ptr = ptr_to_msg_ptr.read_pointer
  msg_valid = Libnl.nlmsg_ok(msg_ptr, msg_length) > 0

  if msg_length > 0 && msg_ptr && msg_valid
    msg_payload_ptr = Libnl.nlmsg_data(msg_ptr)
    msg_payload = Libnl::ProcEvent.new(msg_payload_ptr)
    handle_event(msg_payload)
  end
end

.off(event, handler) ⇒ Object 



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# File 'lib/netlink_proc_event.rb', line 44

def off(event, handler)
  check_event(event)
  return unless event_handlers[event]
  event_handlers[event].delete(handler)
  event_handlers.delete(event) if event_handlers[event].empty?
end

.on(event, &handler) ⇒ Object 



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# File 'lib/netlink_proc_event.rb', line 36

def on(event, &handler)
  check_event(event)
  subscribe_to_proc_events
  event_handlers[event] ||= []
  event_handlers[event] << handler
  handler
end

.socket ⇒ Object 



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# File 'lib/netlink_proc_event.rb', line 17

def socket
  UNIXSocket.for_fd(Libnl.nl_socket_get_fd(nl_socket))
end