How to reassemble TCP packets in Python?

python tcp packet
Tianyang Li picture Tianyang Li · Mar 7, 2011 · Viewed 7.6k times · Source

How to reassemble TCP packets in Python? Is there any existing tools for this?

Thanks! :-)

Answer

Justin picture Justin · Mar 27, 2011

To do perform TCP reassembly you'll need to use something like pynids http://jon.oberheide.org/pynids/.

You can also build your own using pylibpcap, dpkt or scapy.

TCP reassembly is very tricky with a LOT of edge cases. I wouldn't recommend doing it yourself if you need a robust solution.

Related questions

Send/receive Packets with TCP sockets

Recently, I managed to create sockets on my PC and my Raspberry Pi to enable communication between both devices. Currently, the client is able to automatically send messages to the server. I was wondering, if it is possible to modify …

Read More
Get TCP Flags with Scapy

I'm parsing a PCAP file and I need to extract TCP flags (SYN, ACK, PSH, URG, ...). I'm using the packet['TCP'].flags value to obtain all the flags at once. pkts = PcapReader(infile) for p in pkts: F = bin(p[…

Read More
Python: Binding Socket: "Address already in use"

I have a question regarding client socket on TCP/IP network. Let's say I use try: comSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) comSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) except socket.error, msg: sys.stderr.write("[…

Read More