ruby/trema/dsl/runner.rb
#
# Runs DSL objects in right order.
#
# Copyright (C) 2008-2013 NEC Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
require "trema/tremashark"
module Trema
module DSL
class Runner
def initialize context
@context = context
end
def run
maybe_run_trema_services
maybe_run_apps
end
def daemonize
maybe_run_trema_services
maybe_daemonize_apps
end
def maybe_run_switch_manager
# FIXME
return if FileTest.exists? File.join( Trema.pid, "switch_manager.pid" )
switch_manager =
if @context.switch_manager and @context.apps.values.size > 0
last_app = @context.apps.values.last.name
if not @context.switch_manager.rule.has_key?( :port_status )
@context.switch_manager.rule[ :port_status ] = last_app
end
if not @context.switch_manager.rule.has_key?( :packet_in )
@context.switch_manager.rule[ :packet_in ] = last_app
end
if not @context.switch_manager.rule.has_key?( :state_notify )
@context.switch_manager.rule[ :state_notify ] = last_app
end
if not @context.switch_manager.rule.has_key?( :vendor )
@context.switch_manager.rule[ :vendor ] = last_app
end
@context.switch_manager
else
if @context.apps.values.size == 0
rule = { :port_status => "default", :packet_in => "default", :state_notify => "default", :vendor => "default" }
elsif @context.apps.values.size == 1
app_name = @context.apps.values[ 0 ].name
rule = { :port_status => app_name, :packet_in => app_name, :state_notify => app_name, :vendor => app_name }
else
# two or more apps without switch_manager.
raise "No event routing configured. Use `event' directive to specify event routing."
end
SwitchManager.new( rule, @context.port )
end
switch_manager.run!
end
################################################################################
private
################################################################################
def maybe_run_trema_services
maybe_run_tremashark
maybe_run_switch_manager
maybe_run_packetin_filter
maybe_create_links
maybe_run_hosts
maybe_run_switches
maybe_run_trema_switch
maybe_run_netnss
end
def maybe_run_tremashark
Trema::Tremashark.new.run if $use_tremashark
end
def maybe_run_packetin_filter
@context.packetin_filter.run! if @context.packetin_filter
end
def maybe_create_links
maybe_delete_links # Fool proof
@context.links.each do | name, link |
link.enable!
end
end
def maybe_delete_links
@context.links.each do | name, link |
link.delete!
end
end
def maybe_run_hosts
@context.hosts.each do | name, host |
host.run!
end
end
def maybe_run_switches
@context.switches.each do | name, switch |
switch.run!
end
@context.hosts.each do | name, host |
host.add_arp_entry @context.hosts.values - [ host ]
end
end
def maybe_run_netnss
@context.netnss.each do | name, netns |
netns.run!
end
end
def maybe_run_trema_switch
@context.trema_switches.each do | name, trema_switch |
trema_switch.run!
end
end
def maybe_run_apps
return if @context.apps.values.empty?
@context.apps.values[ 0..-2 ].each do | each |
each.daemonize!
end
trap( "SIGINT" ) do
print( "\nterminated\n" )
exit(0)
end
pid = ::Process.fork do
@context.apps.values.last.run!
end
::Process.waitpid pid
end
def maybe_daemonize_apps
@context.apps.each do | name, app |
app.daemonize!
end
end
end
end
end
### Local variables:
### mode: Ruby
### coding: utf-8-unix
### indent-tabs-mode: nil
### End: