KasperskyOS Community Edition 1.0

multi_vfs_dhcpcd example

Example use of the kl.Dhcpcd entity.

The Dhcpcd entity is an implementation of a DHCP client, which gets network interface parameters from an external DHCP server in the background and passes them to a virtual file system (VFS) entity.

The example also demonstrates the use of different VFS in a single solution. The example uses different VFS to access the functions for working with the file system and functions for working with the network:

• VfsNet is used for working with the network.
• VfsRamfs and VfsSdCardFs are used for working with the file system.

The Client entity uses standard libc library functions for getting information on network interfaces (ioctl), which are converted to calls to VFS entities via IPC.

The Env entity is used to pass environment variables and main function arguments to other entities.

The CMake system, which is included with KasperskyOS Community Edition, is used to build and run the example.

Supplied resources

The following configuration files are included in the example:

• ./resources/include/config.h.in contains a description of the backend file system that will be used in the solution: sdcard or ramfs.

  Each backend in the solution also uses a separate VFS: respectively VfsSdCardFs or VfsRamfs.

• The ./resources/ramfs/etc and /resources/sdcard/etc directories contain configuration files for the VFS and Dhcpcd entities.

Example files

The code of the example and build scripts are available at the following path:

Building and running example

To run an example on QEMU, go to the directory containing the example, build the example and run the following commands:

See also Building and running examples section.