Module linux 

Linux /dev/dvb/adapterN/caM CaDevice implementation (the linux feature).

This is the one place the crate uses unsafe — the DVB CA ioctls (CA_RESET, CA_GET_SLOT_INFO) via libc. The ioctl request numbers are computed from the standard Linux _IOC encoding (Documentation/userspace-api

• include/uapi/linux/dvb/ca.h), not hard-coded magic.

Runtime behaviour requires a real DVB card with a CI slot; it is compile-checked in CI but exercised only on hardware.

Structs

LinuxCaDevice

A CaDevice backed by a Linux DVB CA character device.

LinuxCiDataDevice

A CiDataDevice backed by a Linux DVB CI TS data-plane device (/dev/dvb/adapterN/ciM). The host writes scrambled TS and reads the descrambled TS back; I/O is in whole 188-byte packets.