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feat(torad): upgrade librqbit to 9.0.0-rc.0 and add --bind-device

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Pinned exactly (=9.0.0-rc.0) — no v9 stable exists yet, so a caret range
would silently drift onto a future prerelease.

Two source changes were needed for the upgrade:

- `torrent_from_bytes_ext` moved to `librqbit_core::torrent_metainfo::
  torrent_from_bytes` and no longer wraps the result in a `meta` field.
- `peer_stats.live` / `.not_needed` are now `u32`, so the casts are
  redundant.

v9 also adds `SessionOptions::bind_device_name`, which is the reason for
the upgrade: it applies SO_BINDTODEVICE to every librqbit socket — peer
connections, trackers, DHT and LSD. Binding those to a VPN interface
means that when the interface goes away the sockets error out instead of
falling back to the host route, giving a kernel-enforced kill switch.
Exposed as --bind-device / TORAD_BIND_DEVICE; unset reproduces today's
behaviour exactly.

Note that `listen` stays at its default of None, so there is no listener
and no uTP socket in either direction — torad is TCP-only and leech-only.
That is unchanged from v8 but now written down, since incoming
connections need NAT-PMP port forwarding that we have not built.

Also drops torad's `nix` pin from 0.29 to 0.31.3 to match the sibling
tora crate; the workspace was carrying three copies.

Verified end-to-end against a real swarm rather than by compiling alone:
a 755 MiB torrent added via HTTP .torrent URL, driven through
pending -> downloading -> finished, with pause/resume on an active
torrent, remove, and the notification stream all exercised. Evidence in
.omo/evidence/task-5-torad-vpn-namespace.txt.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Alexander
2026-08-15 00:17:09 +02:00
parent 7842b5aeba
commit dd41f1961f
5 changed files with 384 additions and 100 deletions
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crates/torad/Cargo.toml
+3 -2
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@@ -7,8 +7,9 @@ edition = "2024"
anyhow = "1.0.103"
async-trait = "0.1"
clap = { version = "4.6.1", features = ["derive", "env"] }
librqbit = { version = "8.1.1", default-features = false, features = ["rust-tls", "http-api-client"] }
librqbit-core = { version = "5.0.0", default-features = false }
librqbit = { version = "=9.0.0-rc.0", default-features = false, features = ["rust-tls", "http-api-client"] }
librqbit-core = { version = "=9.0.0-rc.0", default-features = false }
nix = { version = "0.31.3", features = ["user", "sched", "fs", "process"] }
reqwest = { version = "0.12", default-features = false, features = ["rustls-tls"] }
sha1 = "0.10"
sqlx = { version = "0.9.0", features = ["postgres", "runtime-tokio", "tls-rustls", "uuid"] }