Class: ConcertoConfig::WirelessConnection

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

Overview

802.11* unencrypted wireless connections. These are managed by wpa_supplicant on Debian so we need to create its configuration file and link it to the interfaces file.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ WirelessConnection

Returns a new instance of WirelessConnection.



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# File 'lib/concerto_client/netconfig.rb', line 242

def initialize(args={})
    @ssid = args['ssid'] || ''
    @interface_name = args['interface_name'] if args['interface_name']
    @wpa_config_file = '/tmp/wpa_supplicant.concerto.conf'
end

Instance Attribute Details

#interface_name ⇒ Object

Returns the value of attribute interface_name.



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# File 'lib/concerto_client/netconfig.rb', line 248

def interface_name
  @interface_name
end

#ssid ⇒ Object

Returns the value of attribute ssid.



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# File 'lib/concerto_client/netconfig.rb', line 248

def ssid
  @ssid
end

Class Method Details

.description ⇒ Object 



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# File 'lib/concerto_client/netconfig.rb', line 297

def self.description
    "Wireless connection (no encryption)"
end

.interfaces ⇒ Object 



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# File 'lib/concerto_client/netconfig.rb', line 301

def self.interfaces
    # Again this is not guaranteed to be a catch all.
    devices = Dir.glob('/sys/class/net/{ath,wlan}*')
    devices.map { |d| Interface.new(File.basename(d)) }
end

Instance Method Details

#args ⇒ Object 



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# File 'lib/concerto_client/netconfig.rb', line 290

def args
    {
        'interface_name' => @interface_name,
        'ssid' => @ssid
    }
end

#config_interface_name ⇒ Object 



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# File 'lib/concerto_client/netconfig.rb', line 250

def config_interface_name
    # If the user has requested a specific interface, use it.
    # Otherwise, just pick the first wlan interface, assuming
    # it works and all wlan interfaces have approximately equal
    # reception. When this assumption is wrong the user must force.
    if @interface_name && @interface_name != ''
        @interface_name
    else
        self.class.interfaces[0].name
    end
end

#interfaces_lines ⇒ Object 



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# File 'lib/concerto_client/netconfig.rb', line 285

def interfaces_lines
    # This links the wpa config to the interfaces file.
    ["wpa-conf #{@wpa_config_file}"]
end

#safe_assign ⇒ Object 



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# File 'lib/concerto_client/netconfig.rb', line 268

def safe_assign
    [ :ssid, :interface_name ]
end

#validate ⇒ Object 



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# File 'lib/concerto_client/netconfig.rb', line 262

def validate
    if @ssid == ''
        fail "Need SSID for wireless connection"
    end
end

#write_configs ⇒ Object 



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# File 'lib/concerto_client/netconfig.rb', line 272

def write_configs
    # Write a wpa_supplicant.conf file for an unsecured network.
    File.open(@wpa_config_file, 'w') do |wpaconf|
        # long lines, sorry!
        wpaconf.puts "ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev"
        wpaconf.puts "network={"
        wpaconf.puts "ssid=\"#{@ssid}\""
        wpaconf.puts "scan_ssid=1"
        wpaconf.puts "key_mgmt=NONE"
        wpaconf.puts "}"
    end
end