dvb-ci-runtime 0.14.1

Pure-Rust EN 50221 DVB Common Interface driver runtime — device I/O, TPDU/SPDU poll loop, resource state machines, and CAM/card hot-plug notifications over the dvb-ci codecs.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157

//! Pure-Rust EN 50221 DVB Common Interface **runtime** — the driver loop over
//! the [`dvb_ci`] codecs.
//!
//! [`dvb_ci`] is `no_std` and owns the *wire* layer (TPDU / SPDU / APDU
//! parse+serialize, CA_PMT building, CI Plus extensions). This crate adds the
//! *runtime*: device I/O, the TPDU poll loop, SPDU session management, and the
//! per-resource state machines that together drive a physical CAM, per
//! ETSI EN 50221 and TS 101 699.
//!
//! # Design
//!
//! The whole runtime is written against the [`CaDevice`] trait (the
//! hardware-abstraction boundary), so it runs against either:
//! - a real Linux CA device (`/dev/dvb/adapterN/caM`, the `linux` feature), or
//! - the in-memory [`MockCaDevice`], which makes the state machines testable
//!   without hardware and enables differential testing against an external
//!   reference (drive both with the same scripted mock CAM and assert the
//!   emitted `write`/ioctl byte sequences match).
//!
//! Implemented from the EN 50221 specification.
//!
//! # What's implemented
//!
//! - **Transport** (TPDU, §A.4): `Create_T_C` handshake, empty-`T_Data_Last`
//!   poll cadence, `T_SB` data-available → `T_RCV`, `T_Data_More/Last`
//!   reassembly, reply timeout.
//! - **Session** (SPDU, §7.2): session table; `open_session_request`/response,
//!   host-initiated `create_session`, `close_session`; `session_number` + APDU
//!   routing.
//! - **Resources** (§8): Resource Manager handshake (profile exchange →
//!   [`Notification::CamReady`], then opens module resources),
//!   application_information, conditional_access (`ca_pmt`/`ca_pmt_reply`),
//!   date_time (MJD + BCD), and mmi (surfaces module menus/enquiries as
//!   [`Notification::Mmi`]).
//! - **Descramble helper**: [`Driver::descramble`](crate::driver::Driver::descramble)
//!   / [`HostRequest::Descramble`] runs the full `ca_pmt` query → reply →
//!   ok_descrambling sequence, CAID-filtered to the CAM's `ca_info`.
//! - **Devices**: the in-memory [`MockCaDevice`] + [`MockCiDataDevice`], and the
//!   Linux `/dev/dvb/adapterN/caM` (control) + `ciM` (TS data-plane) devices
//!   behind the `linux` feature. The data plane ([`CiDataDevice`]) carries the
//!   scrambled-in / descrambled-out TS for separate-CI hardware.
//!
//! - **Diagnostics**: [`RecordingCaDevice`] captures the link in both directions;
//!   [`trace::decode_frame`]/[`decode_log`](crate::trace::decode_log) annotate a
//!   capture (TPDU → SPDU → APDU) for live-CAM debugging.
//!
//! # Managed CAS layer (#763)
//!
//! A single-slot CA orchestration layer sits on top of the raw `ca_pmt` /
//! `ca_pmt_reply` surface, fed **parsed `dvb-si` structs** (never raw bytes):
//!
//! - [`Driver::add_service`](crate::Driver::add_service) /
//!   [`remove_service`](crate::Driver::remove_service) — build + send the
//!   `ca_pmt` from a [`dvb_si::tables::pmt::PmtSection`] and track the slot's
//!   active service set (multi-programme list-management handled internally).
//! - [`Driver::set_cat`](crate::Driver::set_cat) — feed the CAT; the EMM-PID
//!   set becomes the CAT's EMM PIDs ∩ the CAM's advertised `ca_info` CAIDs.
//! - [`Driver::emm_pids`](crate::Driver::emm_pids) /
//!   [`descramble_pids`](crate::Driver::descramble_pids) /
//!   [`ca_pids`](crate::Driver::ca_pids) /
//!   [`required_pids`](crate::Driver::required_pids) — the PIDs to route into
//!   the `ci0` data plane (EMM ∪ ES ∪ ECM ∪ PCR = `required_pids`).
//! - [`Driver::set_requery_interval`](crate::Driver::set_requery_interval) — a
//!   periodic `ca_pmt` re-query (`cmd_id = query`) so a card entitled *after*
//!   the initial `ca_pmt` still refreshes; a per-programme status transition
//!   surfaces as an edge-triggered [`Notification::Entitlement`].
//! - [`CaDescrambler`] — a turnkey wrapper that additionally owns the `ci0`
//!   [`CiDataDevice`]: `feed_ts` filters a scrambled TS chunk to
//!   `required_pids()` and returns the descrambled TS. One `CaDescrambler` =
//!   one CI slot = one TS path (multi-tuner ⇒ one per slot).
//!
//! # `ci-probe`
//!
//! With the `linux` feature this crate also builds a **`ci-probe`** binary that
//! discovers and engages an installed CAM: `ci-probe list` / `info` /
//! `descramble <pmt>` / `mmi`, with `--trace` for an annotated link dump.
//!
//! Roadmap: the `host_control` resource and a differential test harness against
//! an external reference.
//!
//! # Example
//!
//! Drive a CAM with the [`MockCaDevice`] — the same `Driver` API works against
//! the real Linux device:
//!
//! ```
//! use std::time::Duration;
//! use dvb_ci_runtime::{Driver, HotPlug, MockCaDevice, Notification};
//! use dvb_ci_runtime::dvb_ci::tpdu::tags;
//!
//! # fn main() -> std::io::Result<()> {
//! // Script a module that accepts the transport connection.
//! let dev = MockCaDevice::new([vec![tags::C_T_C_REPLY, 0x01, 0x01]]);
//! let mut driver = Driver::new(dev);
//!
//! driver.init()?; // reset + open the transport connection
//!
//! // Pump the device: reads frames when readable, otherwise advances the
//! // EN 50221 poll cadence by the timeout.
//! for _ in 0..4 {
//!     driver.pump(Duration::from_millis(100))?;
//! }
//!
//! // Host-facing events (CamReady, ApplicationInfo, CaInfo, Mmi, HotPlug, …)
//! // surface here — either poll-drained:
//! for note in driver.take_notifications() {
//!     match note {
//!         Notification::CamReady => { /* now safe to send a ca_pmt */ }
//!         other => { let _ = other; }
//!     }
//! }
//!
//! // …or, since this crate is sync/sans-IO (no channels), delivered by a
//! // closure callback per pump — `pump_with` for every notification, or
//! // `pump_hotplug` to react only to CAM/card hot-plug transitions:
//! driver.pump_hotplug(Duration::from_millis(100), |hp| match hp {
//!     HotPlug::CamPresent => { /* CAM (re)inserted — re-send any pending ca_pmt */ }
//!     HotPlug::CamRemoved => { /* CAM removed — stop descrambling */ }
//!     _ => {}
//! })?;
//! # Ok(())
//! # }
//! ```

// The portable core is unsafe-free; only the optional Linux device leaf
// (`#[allow(unsafe_code)]` in `linux`) uses ioctls, so this is `deny`, not
// `forbid`.
#![deny(unsafe_code)]
#![warn(missing_docs)]

pub mod dataplane;
pub mod descrambler;
pub mod device;
pub mod driver;
pub mod event;
pub mod managed;
pub mod resource;
pub mod session;
pub mod stack;
pub mod trace;
pub mod transport;

#[cfg(all(feature = "linux", target_os = "linux"))]
pub mod linux;

pub use dataplane::{CiDataDevice, MockCiDataDevice, TS_PACKET_LEN};
pub use descrambler::CaDescrambler;
pub use device::{CaDevice, DeviceOp, LinkEvent, MockCaDevice, RecordingCaDevice, SlotInfo};
pub use driver::Driver;
pub use event::{Action, Event, HostRequest, HotPlug, Notification};
#[cfg(all(feature = "linux", target_os = "linux"))]
pub use linux::{LinuxCaDevice, LinuxCiDataDevice};
pub use managed::{CaError, ManagedCa, ManagedService, REQUERY_DEFAULT};
pub use stack::CiStack;

/// Re-export of the wire-codec crate this runtime drives.
pub use dvb_ci;