Netsem

Standardized, pure-functional IP address validation and port checking utilities.

netsem (Network Semantics) provides synchronous tools for parsing, classifying, and validating network primitives (IPs, Ports, Sockets). It is designed to be a lightweight foundation for network applications, offering a clear separation between semantic validation (syntax, logic) and OS-level interactions (binding, connecting).

Features

• Pure Validation: Parse and validate IPs and Ports without touching the OS.
• IP Classification: Categorize IPs into Loopback, Private, Global, Multicast, or Unspecified.
• Port Classification: Identify System, User, or Dynamic ports.
• OS Checks (Optional): Perform actual bind or connect checks using the check feature (powered by socket2).
• Sync-First: Zero async dependencies. Ready to be wrapped in spawn_blocking if needed.
• Error Handling: Uses thiserror for structured, inspectable errors.

Usage Examples

Check the examples directory for runnable code:

• Basic Usage: examples/simple.rs - Parse a socket address and optionally check if it can be bound.
• IP Classification: examples/ip_classification.rs - Categorize different IP addresses (Loopback, Private, Global, etc.).
• Port Ranges: examples/port_ranges.rs - Classify ports into System, User, and Dynamic ranges.
• OS Checks: examples/os_check.rs - Perform actual bind and connect tests (requires check feature).

Installation

[dependencies]
netsem = { version = "0.1", features = ["full"] }

Feature Flags

License

Released under the MIT License © 2026 Canmi