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#
# Author:: Bryan McLellan (btm@loftninjas.org), Jesse Nelson (spheromak@gmail.com)
# Copyright:: Copyright (c) 2009 Bryan McLellan
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require 'chef/log'
require 'chef/mixin/command'
require 'chef/provider'
require 'ipaddr'
class Chef::Provider::Route < Chef::Provider
include Chef::Mixin::Command
attr_accessor :is_running
MASK = {'0.0.0.0' => '0',
'128.0.0.0' => '1',
'192.0.0.0' => '2',
'224.0.0.0' => '3',
'240.0.0.0' => '4',
'248.0.0.0' => '5',
'252.0.0.0' => '6',
'254.0.0.0' => '7',
'255.0.0.0' => '8',
'255.128.0.0' => '9',
'255.192.0.0' => '10',
'255.224.0.0' => '11',
'255.240.0.0' => '12',
'255.248.0.0' => '13',
'255.252.0.0' => '14',
'255.254.0.0' => '15',
'255.255.0.0' => '16',
'255.255.128.0' => '17',
'255.255.192.0' => '18',
'255.255.224.0' => '19',
'255.255.240.0' => '20',
'255.255.248.0' => '21',
'255.255.252.0' => '22',
'255.255.254.0' => '23',
'255.255.255.0' => '24',
'255.255.255.128' => '25',
'255.255.255.192' => '26',
'255.255.255.224' => '27',
'255.255.255.240' => '28',
'255.255.255.248' => '29',
'255.255.255.252' => '30',
'255.255.255.254' => '31',
'255.255.255.255' => '32' }
def hex2ip(hex_data)
# Cleanup hex data
hex_ip = hex_data.to_s.downcase.gsub(/[^0-9a-f]/, '')
# Check hex data format (IP is a 32bit integer, so should be 8 chars long)
return nil if hex_ip.length != hex_data.length || hex_ip.length != 8
# Extract octets from hex data
octets = hex_ip.scan(/../).reverse.collect { |octet| [octet].pack('H2').unpack("C").first }
# Validate IP
ip = octets.join('.')
begin
IPAddr.new(ip, Socket::AF_INET).to_s
rescue ArgumentError
Chef::Log.debug("Invalid IP address data: hex=#{hex_ip}, ip=#{ip}")
return nil
end
end
def whyrun_supported?
true
end
def load_current_resource
self.is_running = false
# cidr or quad dot mask
if @new_resource.netmask
new_ip = IPAddr.new("#{@new_resource.target}/#{@new_resource.netmask}")
else
new_ip = IPAddr.new(@new_resource.target)
end
# For linux, we use /proc/net/route file to read proc table info
if node[:os] == "linux"
route_file = ::File.open("/proc/net/route", "r")
# Read all routes
while (line = route_file.gets)
# Get all the fields for a route
iface,destination,gateway,flags,refcnt,use,metric,mask,mtu,window,irtt = line.split
# Convert hex-encoded values to quad-dotted notation (e.g. 0064A8C0 => 192.168.100.0)
destination = hex2ip(destination)
gateway = hex2ip(gateway)
mask = hex2ip(mask)
# Skip formatting lines (header, etc)
next unless destination && gateway && mask
Chef::Log.debug("#{@new_resource} system has route: dest=#{destination} mask=#{mask} gw=#{gateway}")
# check if what were trying to configure is already there
# use an ipaddr object with ip/mask this way we can have
# a new resource be in cidr format (i don't feel like
# expanding bitmask by hand.
#
running_ip = IPAddr.new("#{destination}/#{mask}")
Chef::Log.debug("#{@new_resource} new ip: #{new_ip.inspect} running ip: #{running_ip.inspect}")
self.is_running = true if running_ip == new_ip && gateway == @new_resource.gateway
end
route_file.close
end
end
def action_add
# check to see if load_current_resource found the route
if is_running
Chef::Log.debug("#{@new_resource} route already active - nothing to do")
else
command = generate_command(:add)
converge_by ("run #{ command } to add route") do
run_command( :command => command )
Chef::Log.info("#{@new_resource} added")
end
end
#for now we always write the file (ugly but its what it is)
generate_config
end
def action_delete
if is_running
command = generate_command(:delete)
converge_by ("run #{ command } to delete route ") do
run_command( :command => command )
Chef::Log.info("#{@new_resource} removed")
end
else
Chef::Log.debug("#{@new_resource} route does not exist - nothing to do")
end
end
def generate_config
conf = Hash.new
case node[:platform]
when "centos", "redhat", "fedora"
# walk the collection
run_context.resource_collection.each do |resource|
if resource.is_a? Chef::Resource::Route
# default to eth0
if resource.device
dev = resource.device
else
dev = "eth0"
end
conf[dev] = String.new if conf[dev].nil?
if resource.action == :add
conf[dev] << config_file_contents(:add, :target => resource.target, :netmask => resource.netmask, :gateway => resource.gateway)
else
# need to do this for the case when the last route on an int
# is removed
conf[dev] << config_file_contents(:delete)
end
end
end
conf.each do |k, v|
network_file_name = "/etc/sysconfig/network-scripts/route-#{k}"
converge_by ("write route route.#{k}\n#{conf[k]} to #{ network_file_name }") do
network_file = ::File.new(network_file_name, "w")
network_file.puts(conf[k])
Chef::Log.debug("#{@new_resource} writing route.#{k}\n#{conf[k]}")
network_file.close
end
end
end
end
def generate_command(action)
common_route_items = ''
common_route_items << "/#{MASK[@new_resource.netmask.to_s]}" if @new_resource.netmask
common_route_items << " via #{@new_resource.gateway} " if @new_resource.gateway
case action
when :add
command = "ip route replace #{@new_resource.target}"
command << common_route_items
command << " dev #{@new_resource.device} " if @new_resource.device
when :delete
command = "ip route delete #{@new_resource.target}"
command << common_route_items
end
return command
end
def config_file_contents(action, options={})
content = ''
case action
when :add
content << "#{options[:target]}"
content << "/#{options[:netmask]}" if options[:netmask]
content << " via #{options[:gateway]}" if options[:gateway]
content << "\n"
end
return content
end
end
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