Class: Metis::NrpePacket
- Inherits:
-
Object
- Object
- Metis::NrpePacket
- Defined in:
- lib/metis/nrpe_packet.rb
Constant Summary collapse
- NRPE_PACKET_VERSION_3 =
3
- NRPE_PACKET_VERSION_2 =
2
- NRPE_PACKET_VERSION_1 =
1
- QUERY_PACKET =
1
- RESPONSE_PACKET =
2
- MAX_PACKETBUFFER_LENGTH =
1024
- MAX_PACKET_SIZE =
12 + 1024
Instance Attribute Summary collapse
-
#buffer ⇒ Object
Returns the value of attribute buffer.
-
#crc32 ⇒ Object
Returns the value of attribute crc32.
-
#packet_version ⇒ Object
Returns the value of attribute packet_version.
-
#result_code ⇒ Object
Returns the value of attribute result_code.
Class Method Summary collapse
Instance Method Summary collapse
- #calculate_crc32 ⇒ Object
-
#initialize(unpacked = nil) ⇒ NrpePacket
constructor
A new instance of NrpePacket.
- #packet_type ⇒ Object
- #packet_type=(type) ⇒ Object
- #to_bytes(use_crc32 = self.calculate_crc32) ⇒ Object
- #validate_crc32 ⇒ Object
Constructor Details
#initialize(unpacked = nil) ⇒ NrpePacket
Returns a new instance of NrpePacket.
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# File 'lib/metis/nrpe_packet.rb', line 18 def initialize(unpacked=nil) @packet_version = NRPE_PACKET_VERSION_2 @random = 1 if unpacked @packet_version = unpacked[0] @packet_type = unpacked[1] @crc32 = unpacked[2] @result_code = unpacked[3] @buffer = unpacked[4] @random = unpacked[5] end end |
Instance Attribute Details
#buffer ⇒ Object
Returns the value of attribute buffer.
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# File 'lib/metis/nrpe_packet.rb', line 16 def buffer @buffer end |
#crc32 ⇒ Object
Returns the value of attribute crc32.
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# File 'lib/metis/nrpe_packet.rb', line 16 def crc32 @crc32 end |
#packet_version ⇒ Object
Returns the value of attribute packet_version.
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# File 'lib/metis/nrpe_packet.rb', line 16 def packet_version @packet_version end |
#result_code ⇒ Object
Returns the value of attribute result_code.
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# File 'lib/metis/nrpe_packet.rb', line 16 def result_code @result_code end |
Class Method Details
.read(io) ⇒ Object
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# File 'lib/metis/nrpe_packet.rb', line 60 def self.read(io) bytes = io.read(MAX_PACKET_SIZE) values = bytes.unpack("nnNnA#{MAX_PACKETBUFFER_LENGTH}n") packet = self.new(values) packet.validate_crc32 packet end |
Instance Method Details
#calculate_crc32 ⇒ Object
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# File 'lib/metis/nrpe_packet.rb', line 48 def calculate_crc32 Zlib::crc32(self.to_bytes(0)) end |
#packet_type ⇒ Object
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# File 'lib/metis/nrpe_packet.rb', line 32 def packet_type case @packet_type when QUERY_PACKET then :query when RESPONSE_PACKET then :response end end |
#packet_type=(type) ⇒ Object
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# File 'lib/metis/nrpe_packet.rb', line 39 def packet_type=(type) case type when :query then @packet_type = QUERY_PACKET when :response then @packet_type = RESPONSE_PACKET else raise "Invalid packet type" end end |
#to_bytes(use_crc32 = self.calculate_crc32) ⇒ Object
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# File 'lib/metis/nrpe_packet.rb', line 56 def to_bytes(use_crc32=self.calculate_crc32) [ @packet_version, @packet_type, use_crc32, @result_code, @buffer, @random].pack("nnNna#{MAX_PACKETBUFFER_LENGTH}n") end |
#validate_crc32 ⇒ Object
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# File 'lib/metis/nrpe_packet.rb', line 52 def validate_crc32 raise 'Invalid CRC32' unless @crc32 == self.calculate_crc32 end |