Subtrack

Network Stack Fundamentals

Trace packets through every network layer. Capture traffic with libpcap, parse Ethernet frames, IPv4 packets, TCP segments, and UDP/ICMP datagrams by hand.

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~405 Minutes 9 Challenges

Tasks (9)

Split an IPv4 Address into Octets

easy

Classify a TCP/UDP Port Number

easy

Network Stack Fundamentals

Tasks (9)

Split an IPv4 Address into Octets

Classify a TCP/UDP Port Number

Trace a Packet Through Every Network Layer

Capture Packets with libpcap

Parse an Ethernet Frame Manually

Parse an IPv4 Packet Manually

Implement the IPv4 Header Checksum Algorithm

Parse a TCP Segment Manually

Parse UDP Datagrams and ICMP Echo Requests