Rust

ICMP Ping Tool in Rust

Network

Implement a real ping utility from scratch using low-level networking.

⏱️ 5h 20min

📦 16 modules

Full Version

What you'll build

We'll build a fully functional ICMP ping utility from the ground up in Rust. Starting with a bare project scaffold, we progressively add command-line parsing, DNS resolution, raw socket management, and ICMP packet construction using the pnet crate.

Along the way we'll learn how ping actually works at the protocol level — crafting Echo Request packets byte by byte, computing Internet checksums, filtering replies by process ID and sequence number, and measuring round-trip latency with monotonic clocks. By the end, our tool behaves like the real ping command: resolving hostnames, sending repeated requests at configurable intervals, and reporting per-packet timing.

Playground Contents

Project Baseline
Command-Line Arguments
DNS Resolution
First Resolved Address
Ping Service Structure
Transport Channel
Ping Method Skeleton
ICMP Packet Construction
Sending the Packet
Packet Fields and Checksum
Receiving a Reply
Reply Filtering
Repeated Pings
Sequence Tracking
Ping Interval
Round-Trip Reporting

ICMP Ping Tool in Rust

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