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ZNC fails at finding an available nick name #377

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opened 2026-10-05 04:16:28 +02:00 by adam · 0 comments
adam commented 2026-10-05 04:16:28 +02:00
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When the main nick isn't available, znc first tries the alternative nick (if configured), then the main nick with "-" appended, with "|" etc (lots and lots of different things).

Let's say we have Nick=eric and AltNick=eric-. Then the following can happen:

IRC::eric::efnet == Connected()
[CAP LS]
[NICK eric]
[USER eric "eric" "eric" :eric]
[NOTICE AUTH :*** Processing connection to irc.underworld.no]
[NOTICE AUTH :*** Processing connection to irc.underworld.no]
[NOTICE AUTH :*** Looking up your hostname...]
[NOTICE AUTH :*** Looking up your hostname...]
[NOTICE AUTH :*** Checking Ident]
[NOTICE AUTH :*** Checking Ident]
[NOTICE AUTH :*** Couldn't look up your hostname]
[NOTICE AUTH :*** Couldn't look up your hostname]
[NOTICE AUTH :*** Got Ident response]
[NOTICE AUTH :*** Got Ident response]
[:irc.underworld.no CAP * LS :multi-prefix]
[CAP REQ :multi-prefix]
[:irc.underworld.no 433 * eric :Nickname is already in use.]
[NICK eric-]
[:irc.underworld.no CAP * ACK :multi-prefix ]
[CAP END]
[:irc.underworld.no 433 * eric- :Nickname is already in use.]
[NICK eric-]
[:irc.underworld.no 433 * eric- :Nickname is already in use.]
[NICK eric-]
[:irc.underworld.no 433 * eric- :Nickname is already in use.]
[NICK eric-]
[:irc.underworld.no 433 * eric- :Nickname is already in use.]
[NICK eric-]

(etc)

This happens because znc thinks it only now tried the AltNick (eric-) and the next thing it does is trying if Nick with "-" appended works (also "eric-").

Fixing this properly might be non-trivial. Why don't we just drop AltNick?

When the main nick isn't available, znc first tries the alternative nick (if configured), then the main nick with "-" appended, with "|" etc (lots and lots of different things). Let's say we have Nick=eric and AltNick=eric-. Then the following can happen: ``` IRC::eric::efnet == Connected() [CAP LS] [NICK eric] [USER eric "eric" "eric" :eric] [NOTICE AUTH :*** Processing connection to irc.underworld.no] [NOTICE AUTH :*** Processing connection to irc.underworld.no] [NOTICE AUTH :*** Looking up your hostname...] [NOTICE AUTH :*** Looking up your hostname...] [NOTICE AUTH :*** Checking Ident] [NOTICE AUTH :*** Checking Ident] [NOTICE AUTH :*** Couldn't look up your hostname] [NOTICE AUTH :*** Couldn't look up your hostname] [NOTICE AUTH :*** Got Ident response] [NOTICE AUTH :*** Got Ident response] [:irc.underworld.no CAP * LS :multi-prefix] [CAP REQ :multi-prefix] [:irc.underworld.no 433 * eric :Nickname is already in use.] [NICK eric-] [:irc.underworld.no CAP * ACK :multi-prefix ] [CAP END] [:irc.underworld.no 433 * eric- :Nickname is already in use.] [NICK eric-] [:irc.underworld.no 433 * eric- :Nickname is already in use.] [NICK eric-] [:irc.underworld.no 433 * eric- :Nickname is already in use.] [NICK eric-] [:irc.underworld.no 433 * eric- :Nickname is already in use.] [NICK eric-] ``` (etc) This happens because znc thinks it only now tried the AltNick (eric-) and the next thing it does is trying if Nick with "-" appended works (also "eric-"). Fixing this properly might be non-trivial. Why don't we just drop AltNick? <!-- github-sync-id:40604591 -->
adam closed this issue 2026-10-05 04:16:28 +02:00
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Reference: adam/znc#377