connectd: add dev_uniform_padding to connectd_wire.csv
What the developer wrote
Authored by Sangbida Chaudhuri
connectd: add dev_uniform_padding to connectd_wire.csv
This boolean allows lightningd and connectd to be on the same page on whether the uniform padding experimental flag is enabled.
What changed, and why it matters
This commit adds a new internal flag called dev_uniform_padding to a wiring definition file so two parts of the Core Lightning software can agree on whether an experimental traffic-padding feature is turned on. It is a one-line metadata addition with no executable code changes and no security fix.
No security action required. Treat as a normal feature/infrastructure commit.
Security signals we found
No strong security signals were identified.
Evidence from the diff
The diff adds a single msgdata field dev_uniform_padding of type bool to the connectd_init message in connectd/connectd_wire.csv. This is a wire-protocol schema file used to generate serialization code. The accompanying comment states the flag controls padding outgoing messages to uniform 1460-byte segments as a traffic-analysis defence. There is no logic change, no bug fix, and no vulnerability remediation in the patch.
Changed components
connectd/connectd_wire.csvInspect captured patch +2 / −0
diff --git a/connectd/connectd_wire.csv b/connectd/connectd_wire.csv
index d5f6aee3..700e6829 100644
--- a/connectd/connectd_wire.csv
+++ b/connectd/connectd_wire.csv
@@ -29,6 +29,8 @@ msgdata,connectd_init,dev_no_reconnect,bool,
msgdata,connectd_init,dev_fast_reconnect,bool,
msgdata,connectd_init,dev_limit_connections_inflight,bool,
msgdata,connectd_init,dev_keep_nagle,bool,
+# Pad outgoing messages to uniform 1460-byte segments (traffic analysis defence)
+msgdata,connectd_init,dev_uniform_padding,bool,
# Connectd->master, here are the addresses I bound, can announce.
msgtype,connectd_init_reply,2100
Why this scored 15/100
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