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

parse ethernet IP TCP packets C

About this subtrack

Network Stack Fundamentals decodes frames and packets layer by layer so Wireshark stops being magic.

Tasks (9)

Split an IPv4 Address into Octets

Network Stack Fundamentals

About this subtrack

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