Hey, I spotted one of my bird installations being quite spammy with:
babel1: Socket error on <iface>: Destination address required
Digging through the archives, I found this has previously already been reported in BFD contexts, in every occasion, wireguard being mentioned too: - [email protected] - [email protected] - [email protected] Now with me seeing this for babel, I took a closer look. It seems to be a generic behaviour with how wireguard links behave: If the peer the packet should be sent to is offline (or has not yet completed the handshake), the kernel sends a 'Destination address required' error: ``` root@flint2:~# ping fe80::5%wg_rock PING fe80::5%wg_rock (fe80::5%13): 56 data bytes ping: sendto: Destination address required ``` ``` root@flint2:~# wg show wg_rock interface: wg_rock public key: YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY= private key: (hidden) listening port: 8447 peer: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX= preshared key: (hidden) allowed ips: 0.0.0.0/0, ::/0 ``` This probably should get filtered out by babel if the interface is of wireguard type? Or in the babel case, such a message be considered as another signal that the link is down, similar to `check link yes;`? Thanks, Florian
