Files
pyxis/lib/auto_interface
torlando-tech 2504fefa66 fix(autointerface): explicit mld6_joingroup + LOOP + RX/TX diagnostics
Three changes, motivated by debugging "Sideband + pyxis on the same
WiFi don't hear each other's announces":

1. Always call \`mld6_joingroup_netif()\` in addition to \`setsockopt
   IPV6_JOIN_GROUP\`. On ESP-IDF lwIP, the setsockopt path returns
   success but doesn't reliably push the multicast hash into the
   WiFi MAC filter — incoming multicast frames get silently dropped
   at L2. Calling the netif's mld6 API directly programs the chip
   filter. Joining twice on the netif is refcount-safe.

2. Set IPV6_MULTICAST_LOOP=1 so pyxis receives its own multicast
   echoes. ESP-IDF lwIP defaults this off, which makes upstream's
   "carrier lost / multicast echo timeout" warning fire even on a
   functioning network. With LOOP=1, the initial-echo path actually
   works on isolated test setups too. Logged as DEBUG if the
   platform doesn't support the option.

3. Add a periodic \`AutoInterface: stats announce_tx=N tx_fail=N
   disc_rx=N disc_self=N data_rx=N peers=N\` heartbeat (every 10s).
   Without this it's hard to tell whether pyxis isn't sending,
   isn't receiving, or is sending+receiving but rejecting the
   tokens. Discovery-RX from non-self addresses with bad tokens
   now also logs once with the hex prefix so token-mismatch cases
   are visible (group_id drift, scope-suffix encoding mismatches).
   Added _initial_echo_received update on first self-echo so the
   firewall warning at startup_grace fires correctly.

After this, pyxis's own multicast loopback works (disc_self=N
matches announce_tx=N within 10s). Cross-LAN multicast against
rnsd / Sideband still doesn't make it through, which is an ESP32
WiFi multicast TX limitation — pyxis's frames aren't reaching the
AP. Not a fix here; the diagnostics make the boundary visible.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-09 13:29:33 -04:00
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