Class: Syspy::TdsPackageStream
- Inherits:
-
Object
- Object
- Syspy::TdsPackageStream
- Defined in:
- lib/tds_package_stream.rb
Constant Summary collapse
- HEADER_LENGTH =
45
- HEADER_REGEXP =
/\d{3}\.\d{3}\.\d{3}\.\d{3}\.\d{5}-\d{3}\.\d{3}\.\d{3}\.\d{3}\.\d{5}: /
Instance Method Summary collapse
- #each_package ⇒ Object
- #handle_package(io) ⇒ Object
-
#initialize(interface, dst, dst_port) ⇒ TdsPackageStream
constructor
A new instance of TdsPackageStream.
Constructor Details
#initialize(interface, dst, dst_port) ⇒ TdsPackageStream
Returns a new instance of TdsPackageStream.
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# File 'lib/tds_package_stream.rb', line 14 def initialize(interface,dst,dst_port) @interface = interface @dst = dst @dst_port = dst_port @in,@out = IO.pipe() end |
Instance Method Details
#each_package ⇒ Object
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# File 'lib/tds_package_stream.rb', line 21 def each_package() Thread.abort_on_exception = true @tcpdump_thread = Thread.new(){ IO.popen("#{File.dirname(__FILE__)}/tcpflow -c -B -i #{@interface} tcp and dst #{@dst} and dst port #{@dst_port} 2>/dev/null"){|io| content = "" loop(){ content << io.read(1) if(content.match(HEADER_REGEXP)) payload = content[0..(-2 - HEADER_LENGTH)] @out.write(payload) @out.flush content = "" end Log.debug "Network package done" } } } content = "" @in.each_byte(){|byte| if(byte == 0x0F) last_packet_indicator = Bytes.uint(@in) length = Bytes.uint16be(@in) # skip next 4 bytes of the header if(Bytes.uint32be(@in) == 0x00) content << @in.read(length - 8) if(last_packet_indicator == 0x1) begin io = StringIO.new(content) package = handle_package(io) yield package if package ensure content = "" end end end end } end |
#handle_package(io) ⇒ Object
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# File 'lib/tds_package_stream.rb', line 65 def handle_package(io) token = Bytes.uint(io) token_class = TdsTokens.token_class(token) if(token_class) length = TdsTokens.fixed_length(token) unless(length) length_field_size = TdsTokens.length_field_size(token) if(length_field_size) length = Bytes.uintle(io,length_field_size) end end Log.debug("Got #{TdsTokens.token_name(token)} of #{length} bytes") package = token_class.new(io,length) return package end nil end |