Stale cache contents

[hyc]

It seems that avahi-daemon needs a mechanism to flush its cache contents when its network interfaces change state. After months of uptime on my laptop, multiple suspend/resume cycles in hotels and conference centers scattered around the world, I noticed that it was broadcasting a lot of nonexistent services on my home LAN.

20:23:16.243797 IP (tos 0x0, ttl 255, id 50905, offset 0, flags [DF], proto UDP (17), length 575)
192.168.1.204.5353 > 224.0.0.251.5353: 0 [41q] PTR (QM)? _ipps._tcp.local. SRV (QM)? CharlieM-bM-^@M-^Ys MacBook Air._afpovertcp._tcp.local. SRV (QM)? CharlieM-bM-^@M-^Ys MacBook Air._smb._tcp.local. SRV (QM)? CharlieM-bM-^@M-^Ys MacBook Air._sftp-ssh._tcp.local. TXT (QM)? CharlieM-bM-^@M-^Ys MacBook Air._smb._tcp.local. TXT (QM)? CharlieM-bM-^@M-^Ys MacBook Air._afpovertcp._tcp.local. TXT (QM)? CharlieM-bM-^@M-^Ys MacBook Air._sftp-ssh._tcp.local. SRV (QM)? e7450._sftp-ssh._tcp.local. TXT (QM)? e7450._sftp-ssh._tcp.local. SRV (QM)? linux-oe2k._sftp-ssh._tcp.local. TXT (QM)? linux-oe2k._sftp-ssh._tcp.local. SRV (QM)? linux-hufw._sftp-ssh._tcp.local. TXT (QM)? linux-hufw._sftp-ssh._tcp.local. SRV (QM)? ultra-trouble._sftp-ssh._tcp.local. TXT (QM)? ultra-trouble._sftp-ssh._tcp.local. SRV (QM)? MTHELENA._smb._tcp.local. SRV (QM)? SMF-THINKPAD-P51._smb._tcp.local. TXT (QM)? MTHELENA._smb._tcp.local. TXT (QM)? SMF-THINKPAD-P51._smb._tcp.local. SRV (QM)? Erics MacBook Pro._afpovertcp._tcp.local. TXT (QM)? Erics MacBook Pro._afpovertcp._tcp.local. SRV (QM)? Inti._smb._tcp.local. SRV (QM)? Inti._sftp-ssh._tcp.local. TXT (QM)? Inti._smb._tcp.local. TXT (QM)? Inti._sftp-ssh._tcp.local. SRV (QM)? moncayo._sftp-ssh._tcp.local. TXT (QM)? moncayo._sftp-ssh._tcp.local. SRV (QM)? i-113204.local._sftp-ssh._tcp.local. TXT (QM)? i-113204.local._sftp-ssh._tcp.local. SRV (QM)? Magickakiin._ftp._tcp.local. TXT (QM)? Magickakiin._ftp._tcp.local. SRV (QM)? (:<>!^u---._ftp._tcp.local. TXT (QM)? (:<>!^u---._ftp._tcp.local. PTR (QM)? _ftp._tcp.local. PTR (QM)? _webdav._tcp.local. PTR (QM)? _webdavs._tcp.local. PTR (QM)? _sftp-ssh._tcp.local. PTR (QM)? _smb._tcp.local. PTR (QM)? _afpovertcp._tcp.local. PTR (QM)? _nfs._tcp.local. PTR (QM)? _ipp._tcp.local. (547)

After killing and restarting avahi-daemon these all went away. Should not have to kill/restart the daemon just to flush obsolete records from its cache.

[lathiat]

Thanks for the report.

This definitely looks like an issue. I wonder if this would be fixed by the monotonic timer changes I have yet to merge.

Will need to look into this further

[lathiat]

This is probably fixed by #96 (not yet merged)