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init: a protocol you were not granted does not exist

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The registry consults the open rows it has been parsing since P2, so
reaching a contract now takes a grant as well as a binding. A caller
without one is answered exactly as it would be for a name nobody ever
bound: same status, same empty reply, same absent capability, byte for
byte, and no log line on either path — klog_read is ungated, so a line on
one and not the other would be the oracle the design set out to remove.
Refusal and absence being one answer is what lets a supervisor later
narrow, fake or park a child's namespace without the child learning what
it was denied.

The manifest gains a third permission for a shape the plan did not
foresee: attestation is one hop, but the driver tree is three deep — the
PS/2 keyboard and mouse are spawned by ps2-bus, which the device manager
spawned — so no row could name them and PS/2 input would simply stop.
 lets a delegate vouch for what its children *reach*, never for
what they claim; the bind path is untouched, and the laundering deputy is
still refused.

The review found the receive side of a rule this track had already
written down. Every process holds a sendable handle to the registrar —
resolve installs one for anyone who asks — and ipc_reply_wait never asked
who owned the endpoint, so a stranger could dequeue there: take the
provider endpoints riding bind requests, and answer other clients' opens
in the registrar's name. Receiving is the owner's privilege, like binding
a signal or a timer; sending remains anyone's.

Suite 109/109.
This commit is contained in:
Daniel Samson
2026-08-01 04:44:15 +01:00
parent 1379b699f3
commit 7f3eb848f0
13 changed files with 670 additions and 24 deletions
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docs/os-development/protocol-namespace.md
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# The protocol namespace
*Design, agreed 2026-07-31. Supersedes the `ServiceId` registry. Not yet implemented —
the migration plan at the end is the work list.*
*Design, agreed 2026-07-31. Supersedes the `ServiceId` registry. P1–P3 of the
migration plan at the end have landed (the envelope, the registry and the
`ServiceId` flag-day, and restriction stage one); P4 and P5 are the remaining
work list.*
How a program finds, connects to, and is restricted from the things it talks to.
Three ideas, kept deliberately separate: