/usr/lib/ruby/vendor_ruby/ohai/plugins/linux/network.rb is in ohai 8.4.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Chris Read <chris.read@gmail.com>
# Copyright:: Copyright (c) 2008 Opscode, Inc.
# 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.
#
Ohai.plugin(:Network) do
provides "network", "network/interfaces"
provides "counters/network", "counters/network/interfaces"
provides "ipaddress", "ip6address", "macaddress"
def linux_encaps_lookup(encap)
return "Loopback" if encap.eql?("Local Loopback") || encap.eql?("loopback")
return "PPP" if encap.eql?("Point-to-Point Protocol")
return "SLIP" if encap.eql?("Serial Line IP")
return "VJSLIP" if encap.eql?("VJ Serial Line IP")
return "IPIP" if encap.eql?("IPIP Tunnel")
return "6to4" if encap.eql?("IPv6-in-IPv4")
return "Ethernet" if encap.eql?("ether")
encap
end
def ipv6_enabled?
File.exist? "/proc/net/if_inet6"
end
def iproute2_binary_available?
["/sbin/ip", "/usr/bin/ip", "/bin/ip"].any? { |path| File.exist?(path) }
end
collect_data(:linux) do
require 'ipaddr'
iface = Mash.new
net_counters = Mash.new
network Mash.new unless network
network[:interfaces] = Mash.new unless network[:interfaces]
counters Mash.new unless counters
counters[:network] = Mash.new unless counters[:network]
# Match the lead line for an interface from iproute2
# 3: eth0.11@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
# The '@eth0:' portion doesn't exist on primary interfaces and thus is optional in the regex
IPROUTE_INT_REGEX = /^(\d+): ([0-9a-zA-Z@:\.\-_]*?)(@[0-9a-zA-Z]+|):\s/ unless defined? IPROUTE_INT_REGEX
if iproute2_binary_available?
# families to get default routes from
families = [{
:name => "inet",
:default_route => "0.0.0.0/0",
:default_prefix => :default,
:neighbour_attribute => :arp
}]
families << {
:name => "inet6",
:default_route => "::/0",
:default_prefix => :default_inet6,
:neighbour_attribute => :neighbour_inet6
} if ipv6_enabled?
so = shell_out("ip addr")
cint = nil
so.stdout.lines do |line|
if line =~ IPROUTE_INT_REGEX
cint = $2
iface[cint] = Mash.new
if cint =~ /^(\w+)(\d+.*)/
iface[cint][:type] = $1
iface[cint][:number] = $2
end
if line =~ /mtu (\d+)/
iface[cint][:mtu] = $1
end
flags = line.scan(/(UP|BROADCAST|DEBUG|LOOPBACK|POINTTOPOINT|NOTRAILERS|LOWER_UP|NOARP|PROMISC|ALLMULTI|SLAVE|MASTER|MULTICAST|DYNAMIC)/)
if flags.length > 1
iface[cint][:flags] = flags.flatten.uniq
end
end
if line =~ /link\/(\w+) ([\da-f\:]+) /
iface[cint][:encapsulation] = linux_encaps_lookup($1)
unless $2 == "00:00:00:00:00:00"
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][$2.upcase] = { "family" => "lladdr" }
end
end
if line =~ /inet (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})(\/(\d{1,2}))?/
tmp_addr, tmp_prefix = $1, $3
tmp_prefix ||= "32"
original_int = nil
# Are we a formerly aliased interface?
if line =~ /#{cint}:(\d+)$/
sub_int = $1
alias_int = "#{cint}:#{sub_int}"
original_int = cint
cint = alias_int
end
iface[cint] = Mash.new unless iface[cint] # Create the fake alias interface if needed
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][tmp_addr] = { "family" => "inet", "prefixlen" => tmp_prefix }
iface[cint][:addresses][tmp_addr][:netmask] = IPAddr.new("255.255.255.255").mask(tmp_prefix.to_i).to_s
if line =~ /peer (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses][tmp_addr][:peer] = $1
end
if line =~ /brd (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses][tmp_addr][:broadcast] = $1
end
if line =~ /scope (\w+)/
iface[cint][:addresses][tmp_addr][:scope] = ($1.eql?("host") ? "Node" : $1.capitalize)
end
# If we found we were an an alias interface, restore cint to its original value
cint = original_int unless original_int.nil?
end
if line =~ /inet6 ([a-f0-9\:]+)\/(\d+) scope (\w+)/
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
tmp_addr = $1
iface[cint][:addresses][tmp_addr] = { "family" => "inet6", "prefixlen" => $2, "scope" => ($3.eql?("host") ? "Node" : $3.capitalize) }
end
end
so = shell_out("ip -d -s link")
tmp_int = nil
on_rx = true
so.stdout.lines do |line|
if line =~ IPROUTE_INT_REGEX
tmp_int = $2
iface[tmp_int] = Mash.new unless iface[tmp_int]
net_counters[tmp_int] = Mash.new unless net_counters[tmp_int]
end
if line =~ /(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/
int = on_rx ? :rx : :tx
net_counters[tmp_int][int] = Mash.new unless net_counters[tmp_int][int]
net_counters[tmp_int][int][:bytes] = $1
net_counters[tmp_int][int][:packets] = $2
net_counters[tmp_int][int][:errors] = $3
net_counters[tmp_int][int][:drop] = $4
if(int == :rx)
net_counters[tmp_int][int][:overrun] = $5
else
net_counters[tmp_int][int][:carrier] = $5
net_counters[tmp_int][int][:collisions] = $6
end
on_rx = !on_rx
end
if line =~ /qlen (\d+)/
net_counters[tmp_int][:tx] = Mash.new unless net_counters[tmp_int][:tx]
net_counters[tmp_int][:tx][:queuelen] = $1
end
if line =~ /vlan id (\d+)/ or line =~ /vlan protocol ([\w\.]+) id (\d+)/
if $2
tmp_prot = $1
tmp_id = $2
else
tmp_id = $1
end
iface[tmp_int][:vlan] = Mash.new unless iface[tmp_int][:vlan]
iface[tmp_int][:vlan][:id] = tmp_id
iface[tmp_int][:vlan][:protocol] = tmp_prot if tmp_prot
vlan_flags = line.scan(/(REORDER_HDR|GVRP|LOOSE_BINDING)/)
if vlan_flags.length > 0
iface[tmp_int][:vlan][:flags] = vlan_flags.flatten.uniq
end
end
if line =~ /state (\w+)/
iface[tmp_int]['state'] = $1.downcase
end
end
families.each do |family|
neigh_attr = family[:neighbour_attribute]
default_prefix = family[:default_prefix]
so = shell_out("ip -f #{family[:name]} neigh show")
so.stdout.lines do |line|
if line =~ /^([a-f0-9\:\.]+)\s+dev\s+([^\s]+)\s+lladdr\s+([a-fA-F0-9\:]+)/
unless iface[$2]
Ohai::Log.warn("neighbour list has entries for unknown interface #{iface[$2]}")
next
end
iface[$2][neigh_attr] = Mash.new unless iface[$2][neigh_attr]
iface[$2][neigh_attr][$1] = $3.downcase
end
end
# checking the routing tables
# why ?
# 1) to set the default gateway and default interfaces attributes
# 2) on some occasions, the best way to select node[:ipaddress] is to look at
# the routing table source field.
# 3) and since we're at it, let's populate some :routes attributes
# (going to do that for both inet and inet6 addresses)
so = shell_out("ip -o -f #{family[:name]} route show")
so.stdout.lines do |line|
line.strip!
Ohai::Log.debug("Parsing #{line}")
if line =~ /\\/
parts = line.split('\\')
route_dest = parts.shift.strip
route_endings = parts
elsif line =~ /^([^\s]+)\s(.*)$/
route_dest = $1
route_endings = [$2]
else
next
end
route_endings.each do |route_ending|
if route_ending =~ /\bdev\s+([^\s]+)\b/
route_int = $1
else
Ohai::Log.debug("Skipping route entry without a device: '#{line}'")
next
end
unless iface[route_int]
Ohai::Log.debug("Skipping previously unseen interface from 'ip route show': #{route_int}")
next
end
route_entry = Mash.new( :destination => route_dest,
:family => family[:name] )
%w[via scope metric proto src].each do |k|
route_entry[k] = $1 if route_ending =~ /\b#{k}\s+([^\s]+)\b/
end
# a sanity check, especially for Linux-VServer, OpenVZ and LXC:
# don't report the route entry if the src address isn't set on the node
next if route_entry[:src] and not iface[route_int][:addresses].has_key? route_entry[:src]
iface[route_int][:routes] = Array.new unless iface[route_int][:routes]
iface[route_int][:routes] << route_entry
end
end
# now looking at the routes to set the default attributes
# for information, default routes can be of this form :
# - default via 10.0.2.4 dev br0
# - default dev br0 scope link
# - default via 10.0.3.1 dev eth1 src 10.0.3.2 metric 10
# - default via 10.0.4.1 dev eth2 src 10.0.4.2 metric 20
# using a temporary var to hold routes and their interface name
routes = iface.collect do |i,iv|
iv[:routes].collect do |r|
r.merge(:dev=>i) if r[:family] == family[:name]
end.compact if iv[:routes]
end.compact.flatten
# using a temporary var to hold the default route
# in case there are more than 1 default route, sort it by its metric
# and return the first one
# (metric value when unspecified is 0)
default_route = routes.select do |r|
r[:destination] == "default"
end.sort do |x,y|
(x[:metric].nil? ? 0 : x[:metric].to_i) <=> (y[:metric].nil? ? 0 : y[:metric].to_i)
end.first
if default_route.nil? or default_route.empty?
Ohai::Log.debug("Unable to determine default #{family[:name]} interface")
else
network["#{default_prefix}_interface"] = default_route[:dev]
Ohai::Log.debug("#{default_prefix}_interface set to #{default_route[:dev]}")
# setting gateway to 0.0.0.0 or :: if the default route is a link level one
network["#{default_prefix}_gateway"] = default_route[:via] ? default_route[:via] : family[:default_route].chomp("/0")
Ohai::Log.debug("#{default_prefix}_gateway set to #{network["#{default_prefix}_gateway"]}")
# since we're at it, let's populate {ip,mac,ip6}address with the best values
# using the source field when it's specified :
# 1) in the default route
# 2) in the route entry used to reach the default gateway
route = routes.select do |r|
# selecting routes
r[:src] and # it has a src field
iface[r[:dev]] and # the iface exists
iface[r[:dev]][:addresses].has_key? r[:src] and # the src ip is set on the node
iface[r[:dev]][:addresses][r[:src]][:scope].downcase != "link" and # this isn't a link level addresse
( r[:destination] == "default" or
( default_route[:via] and # the default route has a gateway
IPAddress(r[:destination]).include? IPAddress(default_route[:via]) # the route matches the gateway
)
)
end.sort_by do |r|
# sorting the selected routes:
# - getting default routes first
# - then sort by metric
# - then by prefixlen
[
r[:destination] == "default" ? 0 : 1,
r[:metric].nil? ? 0 : r[:metric].to_i,
# for some reason IPAddress doesn't accept "::/0", it doesn't like prefix==0
# just a quick workaround: use 0 if IPAddress fails
begin
IPAddress( r[:destination] == "default" ? family[:default_route] : r[:destination] ).prefix
rescue
0
end
]
end.first
unless route.nil? or route.empty?
if family[:name] == "inet"
ipaddress route[:src]
macaddress iface[route[:dev]][:addresses].select{|k,v| v["family"]=="lladdr"}.first.first unless iface[route[:dev]][:flags].include? "NOARP"
else
ip6address route[:src]
end
end
end
end
else
begin
so = shell_out("route -n")
route_result = so.stdout.split($/).grep( /^0.0.0.0/ )[0].split( /[ \t]+/ )
network[:default_gateway], network[:default_interface] = route_result.values_at(1,7)
rescue Ohai::Exceptions::Exec
Ohai::Log.debug("Unable to determine default interface")
end
so = shell_out("ifconfig -a")
cint = nil
so.stdout.lines do |line|
tmp_addr = nil
# dev_valid_name in the kernel only excludes slashes, nulls, spaces
# http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=blob;f=net/core/dev.c#l851
if line =~ /^([0-9a-zA-Z@\.\:\-_]+)\s+/
cint = $1
iface[cint] = Mash.new
if cint =~ /^(\w+)(\d+.*)/
iface[cint][:type] = $1
iface[cint][:number] = $2
end
end
if line =~ /Link encap:(Local Loopback)/ || line =~ /Link encap:(.+?)\s/
iface[cint][:encapsulation] = linux_encaps_lookup($1)
end
if line =~ /HWaddr (.+?)\s/
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][$1] = { "family" => "lladdr" }
end
if line =~ /inet addr:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][$1] = { "family" => "inet" }
tmp_addr = $1
end
if line =~ /inet6 addr: ([a-f0-9\:]+)\/(\d+) Scope:(\w+)/
iface[cint][:addresses] = Mash.new unless iface[cint][:addresses]
iface[cint][:addresses][$1] = { "family" => "inet6", "prefixlen" => $2, "scope" => ($3.eql?("Host") ? "Node" : $3) }
end
if line =~ /Bcast:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses][tmp_addr]["broadcast"] = $1
end
if line =~ /Mask:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:addresses][tmp_addr]["netmask"] = $1
end
flags = line.scan(/(UP|BROADCAST|DEBUG|LOOPBACK|POINTTOPOINT|NOTRAILERS|RUNNING|NOARP|PROMISC|ALLMULTI|SLAVE|MASTER|MULTICAST|DYNAMIC)\s/)
if flags.length > 1
iface[cint][:flags] = flags.flatten
end
if line =~ /MTU:(\d+)/
iface[cint][:mtu] = $1
end
if line =~ /P-t-P:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
iface[cint][:peer] = $1
end
if line =~ /RX packets:(\d+) errors:(\d+) dropped:(\d+) overruns:(\d+) frame:(\d+)/
net_counters[cint] = Mash.new unless net_counters[cint]
net_counters[cint][:rx] = { "packets" => $1, "errors" => $2, "drop" => $3, "overrun" => $4, "frame" => $5 }
end
if line =~ /TX packets:(\d+) errors:(\d+) dropped:(\d+) overruns:(\d+) carrier:(\d+)/
net_counters[cint][:tx] = { "packets" => $1, "errors" => $2, "drop" => $3, "overrun" => $4, "carrier" => $5 }
end
if line =~ /collisions:(\d+)/
net_counters[cint][:tx]["collisions"] = $1
end
if line =~ /txqueuelen:(\d+)/
net_counters[cint][:tx]["queuelen"] = $1
end
if line =~ /RX bytes:(\d+) \((\d+?\.\d+ .+?)\)/
net_counters[cint][:rx]["bytes"] = $1
end
if line =~ /TX bytes:(\d+) \((\d+?\.\d+ .+?)\)/
net_counters[cint][:tx]["bytes"] = $1
end
end
so = shell_out("arp -an")
so.stdout.lines do |line|
if line =~ /^\S+ \((\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\) at ([a-fA-F0-9\:]+) \[(\w+)\] on ([0-9a-zA-Z\.\:\-]+)/
next unless iface[$4] # this should never happen
iface[$4][:arp] = Mash.new unless iface[$4][:arp]
iface[$4][:arp][$1] = $2.downcase
end
end
end
counters[:network][:interfaces] = net_counters
network["interfaces"] = iface
end
end
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