Improve client nickname syntax description #208
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I disagree. This forbids servers and bridges from using some characters which don't cause any issues in clients. |
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iirc when I was putting these restrictions together originally I was wary of bridges that allow lots of weird characters and some server impls like plexus that are less restrictive and may also allow weird chars. A big inspiration for the denied chars here was the... rfc7700? doc submitted to IRCv3, I think it was. That doc that was focused on unicode nicknames and using PRECIS. |
_includes/concepts.md
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| - They MUST NOT start with a character listed as a [channel type](#channel-types) prefix. | ||
| - They SHOULD NOT contain any dot character `('.', 0x2E)`. | ||
| - They MUST NOT start with a character listed as a [channel membership prefix](#channel-membership-prefixes), or prefix listed in the IRCv3 [`multi-prefix` Extension](https://ircv3.net/specs/extensions/multi-prefix). | ||
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| Servers MAY have additional implementation-specific nickname restrictions. |
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This effectively makes all of the MUST NOT above moot, and allows servers to completely break the protocol.
…dvise server implementations to avoid possible detrimental ambiguity. Should solve ircdocs#203
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| @@ -55,9 +55,10 @@ Nicknames are non-empty strings with the following restrictions: | |||
| - They MUST NOT contain any of the following characters: space `(' ', 0x20)`, comma `(',', 0x2C)`, asterisk `('*', 0x2A)`, question mark `('?', 0x3F)`, exclamation mark `('!', 0x21)`, at sign `('@', 0x40)`. | |||
| - They MUST NOT start with any of the following characters: dollar `('$', 0x24)`, colon `(':', 0x3A)`. | |||
| - They MUST NOT start with a character listed as a [channel type](#channel-types) prefix. | |||
| - They MUST NOT start with a character listed as a [channel membership prefix](#channel-membership-prefixes), or prefix listed in the IRCv3 [`multi-prefix` Extension](https://ircv3.net/specs/extensions/multi-prefix). | |||
| - They SHOULD NOT contain any dot character `('.', 0x2E)`. | |||
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This line should probably be merged into "They MUST NOT contain any of the following characters..."
Align the text with RFC2812 which has a slightly more relaxed nickname syntax as RFC1459 and is the most commonly used one. I'm unsure why the modern documentation tries to be so loose and unspecific about this syntax considering it already clearly states "Servers MAY have additional implementation-specific nickname restrictions.".List channel membership prefixes in the nickname as prohibited, and advise server implementations to avoid possible detrimental ambiguity.
Should solve #203