2. Example using Structure fromString to parse binary data of a SMB message:python from impacket.structure import Structure class SMBHeader(Structure): structure = ( ('protocol', '3s="SMB"'), ('command', 'B'), ('ntStatus', 'I=0'), ('flags', 'B=0x18'), ('flags2', 'H=0'), ('pidHigh', 'H=0'), ('securityFeatures', ':'), ('reserved', 'H=0'), ('tid', 'H=0'), ('pid', 'H=0'), ('uid', 'H=0'), ('mid', 'H=0'), ) # binary data of a SMB message data = b'\xff\x53\x4d\x42\x72\x00\x00\x00\x00\x18\x53\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' # create new SMBHeader instance from binary data smb = SMBHeader.fromString(data) # access properties of the SMBHeader instance print(smb.protocol) # b'SMB' print(smb.command) # 0x72 print(smb.ntStatus) # 0 print(smb.flags) # 0x18 print(smb.flags2) # 0 print(smb.tid) # 0 print(smb.pid) # 0 print(smb.uid) # 0 print(smb.mid) # 0 ``` Package library: The Structure fromString method is part of the Impacket package library. Impacket is a collection of Python classes for working with network protocols. It provides low-level and high-level APIs for different protocols like SMB, HTTP, LDAP etc.