Johnathan Corgan 989ae65fc5 Align the datagram hop-limit helpers with the forwarder's semantics ...

The forwarding path was corrected to full IP semantics: local delivery is not
hop-limit gated, and forwarding decrements first and drops at zero. Two helpers
on SessionDatagram were left implementing the old rule. decrement_ttl still
checked before decrementing, and can_forward still answered true at a hop limit
of one, where the decrement leaves zero and the datagram is dropped. Neither is
called anywhere today, which is precisely why they are worth correcting rather
than leaving as an invitation to reintroduce the defect.

The TtlExhausted reject doc described behaviour that no longer exists. The
reject is charged for a transit arrival at one as well as at zero, and is never
charged for a datagram addressed to this node, whose delivery is decided ahead
of the test.

Both helpers are pinned by tests at the boundary, which fail against the
previous implementations.

2026-07-25 17:05:20 +00:00

..

handlers

Test cost-based parent selection and kernel-drop detection as unit tests

2026-07-23 23:33:01 +00:00

tests

Test cost-based parent selection and kernel-drop detection as unit tests

2026-07-23 23:33:01 +00:00

acl.rs

node: migrate peer ACL to the Reloadable trait and hot-reload the host map

2026-05-29 02:36:00 +00:00

bloom.rs

node: extract immutable state into a shared context and atomic metric registry

2026-06-02 13:05:03 +00:00

context.rs

node: make the shared context the sole store of immutable state

2026-06-02 16:42:05 +00:00

decrypt_worker.rs

data-plane perf overhaul: off-task encrypt + decrypt, GSO, connected UDP

2026-05-19 20:53:31 +00:00

discovery_rate_limit.rs

Tune overly aggressive discovery rate limiting

2026-04-26 19:12:19 +00:00

encrypt_worker.rs

data-plane perf overhaul: off-task encrypt + decrypt, GSO, connected UDP

2026-05-19 20:53:31 +00:00

lifecycle.rs

docs: correct stale doc-comments for LAN handshake and mesh-size

2026-06-14 15:14:05 +00:00

metrics.rs

tree: remove redundant parent_switched metric counter

2026-07-12 15:53:03 +00:00

mod.rs

Correct what the address-to-link map claims to be for

2026-07-25 01:50:40 +00:00

rate_limit.rs

Apply rustfmt to master-only code

2026-04-10 08:47:02 +00:00

reject.rs

Align the datagram hop-limit helpers with the forwarder's semantics

2026-07-25 17:05:20 +00:00

reloadable.rs

node: migrate peer ACL to the Reloadable trait and hot-reload the host map

2026-05-29 02:36:00 +00:00

retry.rs

node: make the shared context the sole store of immutable state

2026-06-02 16:42:05 +00:00

routing_error_rate_limit.rs

Add rustfmt formatting policy and reformat codebase

2026-04-10 08:27:07 +00:00

session_wire.rs

Add rustfmt formatting policy and reformat codebase

2026-04-10 08:27:07 +00:00

session.rs

Make FSP session rekey hitless under packet loss and reordering

2026-05-23 01:54:04 +00:00

stats_history.rs

control: serve high-traffic show_* queries off the rx_loop hot path

2026-06-10 02:31:54 +00:00

stats.rs

tree: remove redundant parent_switched metric counter

2026-07-12 15:53:03 +00:00

tree.rs

tree: remove redundant parent_switched metric counter

2026-07-12 15:53:03 +00:00

wire.rs

Add rustfmt formatting policy and reformat codebase

2026-04-10 08:27:07 +00:00