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Add channel-aware delivery and update roadmap

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This commit is contained in:
Christian Nennemann
2026-02-22 06:31:16 +01:00
parent 9a3fa94858
commit d1ddef4cea
11 changed files with 374 additions and 85 deletions
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14
M3_STATUS.md
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@@ -8,7 +8,7 @@
## What is M3?
M3 adds:
1. **Delivery Service (DS)** — store-and-forward relay for MLS messages (Cap'n Proto RPC on port 7001)
1. **Delivery Service (DS)** — store-and-forward relay for MLS messages (Cap'n Proto RPC on the unified NodeService endpoint)
2. **MLS Group Lifecycle** — `GroupMember` struct: create group, add member (Welcome), join group, send/receive encrypted application messages
---
@@ -47,14 +47,10 @@ Exposes `pub mod delivery_capnp`.
Exposes `pub use group::GroupMember`.
### `quicnprotochat-server/src/main.rs` ✅
Two listeners on one `LocalSet`:
- Port 7000 (AS): `AuthServiceImpl` — unchanged from M2
- Port 7001 (DS): `DeliveryServiceImpl` — new; uses `DashMap<Vec<u8>, VecDeque<Vec<u8>>>` keyed by Ed25519 public key
New CLI flag: `--ds-listen` (default `0.0.0.0:7001`, env `QUICNPROTOCHAT_DS_LISTEN`).
Unified NodeService listener (Auth + Delivery) on one QUIC/TLS endpoint; uses `DashMap<Vec<u8>, VecDeque<Vec<u8>>>` keyed by Ed25519 public key.
### `quicnprotochat-client/src/main.rs` ✅
Added `demo-group` subcommand to exercise the full Alice↔Bob MLS flow against live AS (7000) and DS (7001): uploads both KeyPackages, delivers Welcome via DS, and exchanges application messages.
Added `demo-group` subcommand to exercise the full Alice↔Bob MLS flow against live NodeService (4201): uploads both KeyPackages, delivers Welcome, and exchanges application messages.
### `quicnprotochat-client/tests` ✅
`cargo test -p quicnprotochat-client --tests` passes, including the MLS round-trip integration test.
@@ -69,8 +65,8 @@ Open question (future work): if we need persistent groups instead of ephemeral d
## Key Design Decisions
### DS Port (7001) vs same port
The server uses **two separate listeners** (7000 for AS, 7001 for DS) because capnp-rpc supports only one bootstrap capability per connection. No new schema was needed.
### DS Port (single endpoint)
The server now exposes a **single NodeService** endpoint (default 4201) that combines Authentication and Delivery over one capnp-rpc bootstrap capability.
### GroupMember lifecycle (CRITICAL)
The `OpenMlsRustCrypto` backend holds the HPKE init private key **in memory**. The **same `GroupMember` instance** must be used from `generate_key_package()` through `join_group()`. Do NOT create a new GroupMember between these calls.