1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
#
# Author:: Bryan McLellan (btm@loftninjas.org), Jesse Nelson (spheromak@gmail.com)
# Copyright:: Copyright 2009-2016, 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/provider"
require "ipaddr"
class Chef
class Provider
class Route < Chef::Provider
provides :route
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" }.freeze
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
logger.trace("Invalid IP address data: hex=#{hex_ip}, ip=#{ip}")
return nil
end
end
def load_current_resource
self.is_running = false
# cidr or quad dot mask
new_ip = if new_resource.target == "default"
IPAddr.new(new_resource.gateway)
elsif new_resource.netmask
IPAddr.new("#{new_resource.target}/#{new_resource.netmask}")
else
IPAddr.new(new_resource.target)
end
# For linux, we use /proc/net/route file to read proc table info
return 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
_, destination, gateway, _, _, _, _, mask = 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
logger.trace("#{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}")
logger.trace("#{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
def action_add
# check to see if load_current_resource found the route
if is_running
logger.trace("#{new_resource} route already active - nothing to do")
else
command = generate_command(:add)
converge_by("run #{command.join(' ')} to add route") do
shell_out_compact!(command)
logger.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.join(' ')} to delete route ") do
shell_out_compact!(command)
logger.info("#{new_resource} removed")
end
else
logger.trace("#{new_resource} route does not exist - nothing to do")
end
# for now we always write the file (ugly but its what it is)
generate_config
end
def generate_config
conf = {}
case node[:platform]
when "centos", "redhat", "fedora"
# walk the collection
run_context.resource_collection.each do |resource|
next unless resource.is_a? Chef::Resource::Route
# default to eth0
dev = if resource.device
resource.device
else
"eth0"
end
conf[dev] = "" if conf[dev].nil?
case @action
when :add
conf[dev] << config_file_contents(:add, comment: resource.comment, target: resource.target, netmask: resource.netmask, gateway: resource.gateway) if resource.action == [:add]
when :delete
# need to do this for the case when the last route on an int
# is removed
conf[dev] << config_file_contents(:delete)
end
end
conf.each_key do |k|
if new_resource.target == "default"
network_file_name = "/etc/sysconfig/network"
converge_by("write route default route to #{network_file_name}") do
logger.trace("#{new_resource} writing default route #{new_resource.gateway} to #{network_file_name}")
if ::File.exist?(network_file_name)
network_file = ::Chef::Util::FileEdit.new(network_file_name)
network_file.search_file_replace_line /^GATEWAY=/, "GATEWAY=#{new_resource.gateway}"
network_file.insert_line_if_no_match /^GATEWAY=/, "GATEWAY=#{new_resource.gateway}"
network_file.write_file
else
network_file = ::File.new(network_file_name, "w")
network_file.puts("GATEWAY=#{new_resource.gateway}")
network_file.close
end
end
else
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])
logger.trace("#{new_resource} writing route.#{k}\n#{conf[k]}")
network_file.close
end
end
end
end
end
def generate_command(action)
target = new_resource.target
target = "#{target}/#{MASK[new_resource.netmask.to_s]}" if new_resource.netmask
case action
when :add
command = [ "ip", "route", "replace", target ]
command += [ "via", new_resource.gateway ] if new_resource.gateway
command += [ "dev", new_resource.device ] if new_resource.device
when :delete
command = [ "ip", "route", "delete", target ]
command += [ "via", new_resource.gateway ] if new_resource.gateway
end
command
end
def config_file_contents(action, options = {})
content = ""
case action
when :add
content << "# #{options[:comment]}\n" if options[:comment]
content << (options[:target]).to_s
content << "/#{MASK[options[:netmask].to_s]}" if options[:netmask]
content << " via #{options[:gateway]}" if options[:gateway]
content << "\n"
end
content
end
end
end
end
|
