Class: Bandshell::StaticAddressing

Inherits:
Object
  • Object
show all
Defined in:
lib/bandshell/netconfig.rb

Overview

Static IPv4 addressing. We use the IPAddress gem to validate that the address information is vaguely correct (weeding out errors like the gateway being on another subnet)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ StaticAddressing

Returns a new instance of StaticAddressing.



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# File 'lib/bandshell/netconfig.rb', line 314

def initialize(args={})
  @nameservers = args['nameservers']
  @address = args['address']
  @netmask = args['netmask']
  @gateway = args['gateway']
end

Instance Attribute Details

#address ⇒ Object

Returns the value of attribute address.



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# File 'lib/bandshell/netconfig.rb', line 355

def address
  @address
end

#gateway ⇒ Object

Returns the value of attribute gateway.



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# File 'lib/bandshell/netconfig.rb', line 355

def gateway
  @gateway
end

#nameservers ⇒ Object

Returns the value of attribute nameservers.



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# File 'lib/bandshell/netconfig.rb', line 355

def nameservers
  @nameservers
end

#netmask ⇒ Object

Returns the value of attribute netmask.



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# File 'lib/bandshell/netconfig.rb', line 355

def netmask
  @netmask
end

Class Method Details

.description ⇒ Object 



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# File 'lib/bandshell/netconfig.rb', line 351

def self.description
  "Static Addressing"
end

Instance Method Details

#addressing_type ⇒ Object 



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# File 'lib/bandshell/netconfig.rb', line 321

def addressing_type
  'static'
end

#args ⇒ Object 



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# File 'lib/bandshell/netconfig.rb', line 325

def args
  {
    'address' => @address,
    'netmask' => @netmask,
    'gateway' => @gateway,
    'nameservers' => @nameservers
  }
end

#interfaces_lines ⇒ Object 



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# File 'lib/bandshell/netconfig.rb', line 334

def interfaces_lines
  [
    "address #{@address}",
    "netmask #{@netmask}",
    "gateway #{@gateway}"
  ]
end

#nameservers_flat ⇒ Object 



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# File 'lib/bandshell/netconfig.rb', line 398

def nameservers_flat
  @nameservers.join(',')
end

#nameservers_flat=(separated_list) ⇒ Object

These next two methods are for the web interface, where it’s more convenient to enter a bunch of nameservers on one line than to have to deal with an array of fields.



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# File 'lib/bandshell/netconfig.rb', line 386

def nameservers_flat=(separated_list)
  servers = separated_list.strip.split(/\s*[,|:;\s]\s*/)
  servers.each do |server|
    server.strip!
    p server
    if not IPAddress.valid? server
      fail "One or more invalid IP addresses in nameserver list"
    end
  end
  @nameservers = servers
end

#safe_assign ⇒ Object 



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# File 'lib/bandshell/netconfig.rb', line 357

def safe_assign
  [ :address, :netmask, :gateway, :nameservers_flat ]
end

#validate ⇒ Object 



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# File 'lib/bandshell/netconfig.rb', line 361

def validate
  @address.strip!
  @netmask.strip!
  @gateway.strip!

  if not IPAddress.valid_ipv4?(@address)
    fail "Static address is invalid"
  end

  p @netmask
  if not IPAddress.valid_ipv4_netmask?(@netmask)
    fail "Static netmask is invalid"
  end

  p @netmask
  subnet = IPAddress::IPv4.new(@address)
  subnet.netmask = @netmask
  if not subnet.include? IPAddress::IPv4.new(gateway)
    fail "Gateway provided is unreachable"
  end
end

#write_configs ⇒ Object 



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# File 'lib/bandshell/netconfig.rb', line 343

def write_configs
  File.open('/etc/resolv.conf','w') do |resolvconf|
    @nameservers.each do |nameserver|
      resolvconf.puts("nameserver #{nameserver}");
    end
  end
end