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TCP/IP from Scratch

Build a TCP stack yourself. Implement UDP clients and servers with raw syscalls, the TCP 3-way handshake, data transfer with sequence numbers, retransmission, sliding windows, congestion control, and connection teardown.

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~360 Minutes 8 Challenges

Tasks (8)

Implement a UDP Client and Server Using Only Syscalls

medium

Implement the TCP 3-Way Handshake Using Raw Sockets

hard

TCP/IP from Scratch

Tasks (8)

Implement a UDP Client and Server Using Only Syscalls

Implement the TCP 3-Way Handshake Using Raw Sockets

Implement TCP Data Transfer with Sequence Numbers and ACKs

Add Retransmission for Unacknowledged Segments

Implement TCP Sliding Window Flow Control

Implement TCP Connection Teardown (FIN/ACK Sequence)

Implement a Simple Congestion Control Algorithm

Use a TUN/TAP Interface to Inject Your TCP Stack