Class: Metasploit::Aggregator::Tlv::Tlv
- Inherits:
-
Object
- Object
- Metasploit::Aggregator::Tlv::Tlv
- Defined in:
- lib/metasploit/aggregator/tlv/packet.rb
Overview
Base TLV (Type-Length-Value) class
Direct Known Subclasses
Instance Attribute Summary collapse
-
#compress ⇒ Object
Returns the value of attribute compress.
-
#type ⇒ Object
Returns the value of attribute type.
-
#value ⇒ Object
Returns the value of attribute value.
Instance Method Summary collapse
-
#from_r(raw) ⇒ Object
Translates the raw format of the TLV into a sanitize version.
-
#initialize(type, value = nil, compress = false) ⇒ Tlv
constructor
Returns an instance of a TLV.
- #inspect ⇒ Object
-
#meta_type?(meta) ⇒ Boolean
Checks to see if a TLVs meta type is equivalent to the meta type passed.
-
#to_r ⇒ Object
Converts the TLV to raw.
-
#type?(type) ⇒ Boolean
Checks to see if the TLVs type is equivalent to the type passed.
-
#value?(value) ⇒ Boolean
Checks to see if the TLVs value is equivalent to the value passed.
Constructor Details
#initialize(type, value = nil, compress = false) ⇒ Tlv
Returns an instance of a TLV.
149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 149 def initialize(type, value = nil, compress=false) @type = type @compress = compress if (value != nil) if (type & TLV_META_TYPE_STRING == TLV_META_TYPE_STRING) if (value.kind_of?(Integer)) @value = value.to_s else @value = value.dup end else @value = value end end end |
Instance Attribute Details
#compress ⇒ Object
Returns the value of attribute compress.
138 139 140 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 138 def compress @compress end |
#type ⇒ Object
Returns the value of attribute type.
138 139 140 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 138 def type @type end |
#value ⇒ Object
Returns the value of attribute value.
138 139 140 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 138 def value @value end |
Instance Method Details
#from_r(raw) ⇒ Object
Translates the raw format of the TLV into a sanitize version.
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 279 def from_r(raw) self.value = nil length, self.type = raw.unpack("NN"); # check if the tlv value has been compressed... if( self.type & TLV_META_TYPE_COMPRESSED == TLV_META_TYPE_COMPRESSED ) # set this TLV as using compression @compress = true # remove the TLV_META_TYPE_COMPRESSED flag from the tlv type to restore the # tlv type to its origional, allowing for transparent data compression. self.type = self.type ^ TLV_META_TYPE_COMPRESSED # decompress the compressed data (skipping the length and type DWORD's) raw_decompressed = Rex::Text.zlib_inflate( raw[8..length-1] ) # update the length to reflect the decompressed data length (+8 for the length and type DWORD's) length = raw_decompressed.length + 8 # update the raw buffer with the new length, decompressed data and updated type. raw = [length, self.type].pack("NN") + raw_decompressed end if (self.type & TLV_META_TYPE_STRING == TLV_META_TYPE_STRING) if (raw.length > 0) self.value = raw[8..length-2] else self.value = nil end elsif (self.type & TLV_META_TYPE_UINT == TLV_META_TYPE_UINT) self.value = raw.unpack("NNN")[2] elsif (self.type & TLV_META_TYPE_QWORD == TLV_META_TYPE_QWORD) self.value = raw.unpack("NNQ<")[2] self.value = self.ntohq( self.value ) elsif (self.type & TLV_META_TYPE_BOOL == TLV_META_TYPE_BOOL) self.value = raw.unpack("NNc")[2] if (self.value == 1) self.value = true else self.value = false end else self.value = raw[8..length-1] end return length; end |
#inspect ⇒ Object
166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 166 def inspect utype = type ^ TLV_META_TYPE_COMPRESSED group = false = case (utype & TLV_META_MASK) when TLV_META_TYPE_STRING; "STRING" when TLV_META_TYPE_UINT; "INT" when TLV_META_TYPE_RAW; "RAW" when TLV_META_TYPE_BOOL; "BOOL" when TLV_META_TYPE_QWORD; "QWORD" when TLV_META_TYPE_GROUP; group=true; "GROUP" when TLV_META_TYPE_COMPLEX; "COMPLEX" else; 'unknown-meta-type' end stype = "unknown-#{type}" Metasploit::Aggregator::Tlv.constants.each do |value| next unless Metasploit::Aggregator::Tlv.const_get(value) == type stype = value.to_s break end val = value.inspect if val.length > 50 val = val[0,50] + ' ..."' end group ||= (self.class.to_s =~ /Packet/) if group tlvs_inspect = "tlvs=[\n" @tlvs.each { |t| tlvs_inspect << " #{t.inspect}\n" } tlvs_inspect << "]" else tlvs_inspect = "meta=#{.ljust 10} value=#{val}" end "#<#{self.class} type=#{stype.ljust 15} #{tlvs_inspect}>" end |
#meta_type?(meta) ⇒ Boolean
Checks to see if a TLVs meta type is equivalent to the meta type passed.
211 212 213 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 211 def () return (self.type & == ) end |
#to_r ⇒ Object
Converts the TLV to raw.
238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 238 def to_r # Forcibly convert to ASCII-8BIT encoding raw = value.to_s.unpack("C*").pack("C*") if (self.type & TLV_META_TYPE_STRING == TLV_META_TYPE_STRING) raw += "\x00" elsif (self.type & TLV_META_TYPE_UINT == TLV_META_TYPE_UINT) raw = [value].pack("N") elsif (self.type & TLV_META_TYPE_QWORD == TLV_META_TYPE_QWORD) raw = [ self.htonq( value.to_i ) ].pack("Q<") elsif (self.type & TLV_META_TYPE_BOOL == TLV_META_TYPE_BOOL) if (value == true) raw = [1].pack("c") else raw = [0].pack("c") end end # check if the tlv is to be compressed... if( @compress ) raw_uncompressed = raw # compress the raw data raw_compressed = Rex::Text.zlib_deflate( raw_uncompressed ) # check we have actually made the raw data smaller... # (small blobs often compress slightly larger then the origional) # if the compressed data is not smaller, we dont use the compressed data if( raw_compressed.length < raw_uncompressed.length ) # if so, set the TLV's type to indicate compression is used self.type = self.type | TLV_META_TYPE_COMPRESSED # update the raw data with the uncompressed data length + compressed data # (we include the uncompressed data length as the C side will need to know this for decompression) raw = [ raw_uncompressed.length ].pack("N") + raw_compressed end end return [raw.length + 8, self.type].pack("NN") + raw end |
#type?(type) ⇒ Boolean
Checks to see if the TLVs type is equivalent to the type passed.
218 219 220 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 218 def type?(type) return self.type == type end |
#value?(value) ⇒ Boolean
Checks to see if the TLVs value is equivalent to the value passed.
225 226 227 |
# File 'lib/metasploit/aggregator/tlv/packet.rb', line 225 def value?(value) return self.value == value end |