| 336 | |
| 337 | |
| 338 | class NBTDatagram(Packet): |
| 339 | name = "NBT Datagram Packet" |
| 340 | fields_desc = [ByteField("Type", 0x10), |
| 341 | ByteField("Flags", 0x02), |
| 342 | ShortField("ID", 0), |
| 343 | IPField("SourceIP", "127.0.0.1"), |
| 344 | ShortField("SourcePort", 138), |
| 345 | ShortField("Length", None), |
| 346 | ShortField("Offset", 0), |
| 347 | NetBIOSNameField("SourceName", "windows"), |
| 348 | ShortEnumField("SUFFIX1", 0x4141, _NETBIOS_SUFFIXES), |
| 349 | ByteField("NULL1", 0), |
| 350 | NetBIOSNameField("DestinationName", "windows"), |
| 351 | ShortEnumField("SUFFIX2", 0x4141, _NETBIOS_SUFFIXES), |
| 352 | ByteField("NULL2", 0)] |
| 353 | |
| 354 | def post_build(self, pkt, pay): |
| 355 | if self.Length is None: |
| 356 | length = len(pay) + 68 |
| 357 | pkt = pkt[:10] + struct.pack("!H", length) + pkt[12:] |
| 358 | return pkt + pay |
| 359 | |
| 360 | |
| 361 | # SESSION SERVICE PACKETS |
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