usrlibsystemdnetwork

usrlibsystemdnetwork is a library component within the systemd project that provides a C application programming interface (API) for interacting with the system’s network configuration and state, with particular alignment to systemd-networkd. It is designed for software that needs to query network topology, interfaces, addresses, routes, DNS settings, and related data in a consistent, platform-aware manner.

The library focuses on representing and manipulating network-related data structures and enabling communication with the systemd-networkd daemon to obtain current network state. It does not implement the network stack itself; instead, it offers data accessors and helpers that applications can use to reflect or respond to network configurations managed by systemd-networkd. Changes to network configuration are typically performed through systemd-networkd configuration files or other system management interfaces, while the library provides read-only or convenience access to the resulting state.

APIs are exposed as a C interface and are intended for use by system software and tooling that require tight integration with systemd’s network facilities. Developers link against the libsystemd-network library and include the corresponding headers to retrieve information about interfaces, addresses, routes, DNS settings, and related network data, or to receive notifications about relevant state changes.

Availability and licensing: the library is distributed as part of the systemd project and is packaged by many Linux distributions under the systemd umbrella. Licensing follows the systemd project terms for the components, typically aligning with permissive open-source licenses used by systemd. Documentation and usage examples are provided in the systemd documentation and associated man pages alongside other libsystemd components. See also systemd, systemd-networkd, and libsystemd.