Keep `_stream_name_events()` non-blocking so a slow memory-channel
consumer cannot back up the kernel topology queue. Raise
`TIPCNameEventOverflow` and end the subscription rather than drop a
transition or let the socket reader stall. Discovery consumers must
then resubscribe and rebuild their name-table view.
Also,
- document topology semantics and scope with Linux references
- diagram the `.connect()`/`.getpeername()` withdrawal schedules
- explain the child-service and callable requirements in the
two-host example
Review: PR #493 (copilot-pull-request-reviewer[bot],goodboy)
https://github.com/goodboy/tractor/pull/493
(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))
Stop labeling topology events with caller-supplied scope that the
kernel never reports. Event addresses now carry an explicit unknown
scope instead of fabricated reachability.
Apply memory-channel backpressure rather than silently dropping
publish/withdraw transitions, and close the stream after delivering
the terminal event from a finite subscription.
Review: PR #493 (copilot-pull-request-reviewer[bot],goodboy)
https://github.com/goodboy/tractor/pull/493
(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))
Reject TIPC availability outside Linux before probing the fallback
socket-family integer, which can alias an unrelated family on
another OS.
Keep dialled sockets under setup ownership through transport
construction, then reuse the constructor's tolerant peer
observation. A peer withdrawing after `.connect()` can no longer
trigger a second raw `getpeername()` or leak setup resources.
Review: PR #493 (copilot-pull-request-reviewer[bot],goodboy)
https://github.com/goodboy/tractor/pull/493
(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))
TIPC service names span the cluster while PIDs remain host-local.
Hashing only `(name, pid)` could therefore make same-named actors
on different hosts silently share one round-robin service name.
Derive the live-runtime seed from `Aid.uid` so the actor UUID
separates those names while keeping each identity reproducible.
Pin both properties with a deterministic regression test.
Review: PR #493 (copilot-pull-request-reviewer[bot],goodboy)
https://github.com/goodboy/tractor/pull/493
(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))
Restrict proto-key matching to numeric 3- or 4-element
descriptors so a UDS directory named `tipc` stays UDS.
Route `/tipc` parsing through `TIPCAddress.from_addr()` to
normalize zone scope and report malformed input clearly. Also
align UDS unwrapped metadata with its actual `(str, str)` shape.
Keep the TIPC test module portable by importing `SOL_TIPC` from
the backend's UAPI fallback instead of the host `socket` module.
Review: PR #493 (copilot-pull-request-reviewer[bot],goodboy)
https://github.com/goodboy/tractor/pull/493
(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))
Second half of layer B: an `@acm` yielding a `trio` receive-chan
of `TIPCNameEvent` fed by a nursery-spawned reader on a
`SOCK_SEQPACKET` conn to `TIPC_TOP_SRV`.
This is the bit that makes #378's "end game cluster proto" claim
real — the kernel *tells* us when any actor anywhere in the
cluster publishes or withdraws a service name, so a registrar
never has to poll `find_actor()`. Groundwork for the push
registry in `discovery/_registry.py` (gh #184, #216).
Deats,
- `filt` selects granularity; `TIPC_SUB_SERVICE` is one event
per *name*, `TIPC_SUB_PORTS` one per *publisher* — the latter
makes the §2.3 duplicate-name/round-robin crosstalk case
externally observable, which is how a push-registry could
ever detect it.
- a full event buf **drops** w/ a loud warning rather than
blocking the reader; stalling it just backs up the kernel's
own queue and loses the event less visibly.
- `SOCK_SEQPACKET` is fine here bc this sock never goes through
`MsgpackTransport` — the contract's "`SOCK_STREAM` only" rule
is about `MsgTransport` streams, not this.
XXX teardown order is load-bearing: cancel the nursery BEFORE
closing the fd. `.close()`ing out from under a pending
`.recv()` races — trio's retry can land on an already-freed fd
and raise a bare `OSError(EBADF)` instead of the
`ClosedResourceError` the reader guards for, which then escapes
the nursery as an eg.
(this patch was generated in some part by `claude-code` using `claude-opus-5` (`anthropic`))
First half of plan 01 §5.2 (layer B): the `struct` layouts and
the `TIPCNameEvent` type for the kernel's *push-based* name
table, w/o any socket plumbing yet. Pure-python, so it tests
w/o a loaded `tipc` module.
Deats,
- `_SUBSCR_FMT = '=5I8s'` (28B `struct tipc_subscr`) and
`_EVENT_FMT = '=10I8s'` (48B `struct tipc_event`).
- `_mk_subscr()` masks the timeout: python exposes
`TIPC_WAIT_FOREVER` as **`-1`** which `struct` flat refuses
to pack into an unsigned `'I'`.
- `_decode_name_event()` *drops* runt frames and unknown event
codes rather than raising — a confused kernel must not be
able to kill the reader task.
XXX two corrections to what the plan §5.2 sketch claimed, both
verified against a live kernel,
- the event is **48B** (`4+4+4+8+28`), NOT 40.
- native (`'='`) byte-order is **accepted**; publish+withdraw
both round-tripped w/ the 28B subscription echoed back
intact. So the proposed `_detect_topsrv_endianness()` `'>'`
retry-probe is unnecessary and is NOT implemented.
Note the event carries no *scope* — the name-table doesn't
report one — so the decoded `.addr` echoes the subscription's
own rather than pretending to observe it.
(this patch was generated in some part by `claude-code` using `claude-opus-5` (`anthropic`))
`mk_maddr()`/`parse_maddr()` learn,
/tipc/<stype>/<instance>/<scope>
mirroring how `uds` maps onto the spec-legal `/unix`.
XXX `str`-ONLY for now: there is no registered `/tipc` proto
in the multiaddr table (upstream track gh #483 +
multiformats/py-multiaddr#107) and `Multiaddr()` rejects an
unregistered name outright. `MsgTransport.maddr`s return type
is already `Multiaddr|str` (and `MsgpackUDSStream` already
exercises the `str` branch), so this fits — but it IS why gh
`parse_maddr()` therefore special-cases the `/tipc/` prefix
BEFORE handing anything to `Multiaddr()`.
Also drive the maddr mapping-table tests off `_address_types`
instead of a hardcoded len/dict so the next backend can't
fail them for the wrong reason.
(this patch was generated in some part by `claude-code` using `claude-opus-5` (`anthropic`))
Wire `.connect_to()` (dial by service name), `.connected()`
and `.get_stream_addrs()` on top of `MsgpackTransport` so
`trio.SocketStream` + the existing `<I`-prefix framing carry
`msgpack` msgs over TIPC unchanged.
XXX both ends of a connected TIPC sock answer `TIPC_ADDR_ID`
port-ids and a port-id carries NO service name, so,
- the *dialling* side re-asserts the name it actually dialled
over `._raddr` (same move as `MsgpackUDSStream`s peer-pid
re-assign),
- the *accepting* side keeps a `TIPC_NAME_UNKNOWN` sentinel
plus the observed `(node, ref)`. It doesn't need more — the
`Aid` from `._do_handshake()` already carries the peer's
logical identity.
Also normalize dial failures: TIPC answers an unpublished-name
lookup with `EHOSTUNREACH`, which python maps to a **bare**
`OSError` and NOT a `ConnectionError` subtype the way
`ECONNREFUSED` maps to `ConnectionRefusedError`. The
discovery-ping path needs the `ConnectionError` shape, so the
`_reraise_as_connerr()` wrap is load-bearing, not polish.
XXX ALSO tolerate a dead peer in `.get_stream_addrs()`!
Unlike tcp/uds — where the kernel keeps answering the peer
addr until *we* close — TIPC answers `ENOTCONN` once the peer
is gone. Since `MsgpackTransport.__init__()` calls
`.get_stream_addrs()` (via `Channel.from_stream()`) BEFORE the
handshake, an unguarded `OSError` there escapes
`handle_stream_from_peer()`s handshake tolerance (contract §4)
and tears down the WHOLE actor. Any connect-then-drop peer — a
port scan, a liveness probe, a cancelled dial — was a remote
actor-kill. A dead peer must cost us an addr, not the runtime.
Deats,
- `TIPC_IMPORTANCE` exposed as a `.connect_to()` kwarg — TIPC
can rank a conn's traffic under congestion, which no other
backend can do. Defaulted to the kernel default for now;
wiring the parent<->child chan to `HIGH` is a follow-up.
- `TIPC_DEST_DROPPABLE = 0` so undeliverable msgs surface as
errors instead of being silently dropped.
(this patch was generated in some part by `claude-code` using `claude-opus-5` (`anthropic`))
First slice of the `AF_TIPC` tpt backend: the addr type, the
`is_tipc_available()` capability predicate and the
name-publishing listener. No `MsgTransport` yet.
An actor's TIPC addr is a *service name* `(stype, instance)`:
`.bind()`ing the singleton `TIPC_ADDR_NAMESEQ` range IS the
service registration (it shows up in `tipc nametable show`)
and a peer's `.connect()`-by-name IS the lookup — so the
kernel does discovery for us, no registrar hop.
Deats,
- `.unwrap()` is proto-keyed as `('tipc', stype, inst, scope)`
using the `multiaddr` proto spelling so `wrap_address()`
can't confuse it with `tcp`s or `uds`s 2-tuples.
- `.rebind_from_sockname = False` bc `getsockname()` answers
a port-id; `.from_addr()` raises on a bare `TIPC_ADDR_ID`
rather than fabricate an un-dialable addr.
- `.bindspace` is the TIPC *scope*, i.e. literally the set of
hosts a published name is reachable from. `ZONE` scope is
deprecated/aliased so fold it to `CLUSTER` on input.
- mod stays importable on non-linux (uapi-value fallbacks,
the `_uds.SO_PASSCRED` precedent) bc `._addr` builds its
registration tables at import time.
XXX a `.get_random()` clash does NOT raise `EADDRINUSE` —
TIPC accepts multiple publishers of one name and round-robins
connects between them (verified against a live kernel), so a
collision is *silent crosstalk*. Hence the `blake2b` digest
and its (birthday-bounded) collision test.
Also,
- a generic `.is_available() -> (ok, why_not)` classmethod;
deliberately spelled generically (NOT `is_tipc_*`) so the
sibling env-dependent backends — `quic`/`iroh` (gh #353)
and the `wg` netns bindspace (gh #482) — get the same gate
for free. Its consumer lands w/ the reg tables.
- register a `tipc` pytest mark; the kernel-touching cases
self-skip unless `sudo modprobe tipc` has been run.
(this patch was generated in some part by `claude-code` using `claude-opus-5` (`anthropic`))
Gud Boi