Re: Re: userID starting with numeric char

[antihackrz@xxxxxxxxxxxx (anti hack)]

AFAIK, When UniqueID is implemented, leading digits is reserved to server set nicks.  Users are not allowed to select a nick that begins with a number.  Restricting nicks this way, by allowing only servers to set random nick identifiers prevents nick collisions intentionally caused by users duplicating existing nicks across split servers.

Any such server which is hacked to allow users to set nicks beginning with a number which would defeat this nick collide protection would not likely be allowed to link to IRCnet.

UniqueID also provides for more secure routing of private messages so that nick impostors do not intercept messages not intended for them.


"Prashant  Desai" <reach_prashant@xxxxxxxxxxxxxx> wrote:
>
> 
> whould you please guide me what kind of the trouble it could create ? we will never ,ever have same login(nick name) for two users ? 
> 
> please guide me what kind of problems it can create so that we can think before changing the you suggested 
> 
> 
> thanks & regards
> Prashant Desai 
> 
> ------------- Original Message --------------
> grega@xxxxxxxxxx wrote:
> To:"Prashant  Desai" <reach_prashant@xxxxxxxxxxxxxx>
> From:grega@xxxxxxxxxx
> Date:Wed, 09 May 2001 21:00:16 +0200
> CC:ircd-users@xxxxxxx
> Subject:Re: userID starting with numeric char
> 
> > is it possible if i change something in ircd source code ? it should be
> possible ? 
> > why its not possible to have nickname starting with a numeric char ? can
> some > one  guide me in a bit brief way ?
> 
> This limitation is afaik there because of long ago
> channels where just a number.
> (BTW: also because of that we have join 0 - to part all channels)
> So ircd had to distinguish if a message was ment for a user or a channel 
> this (digit / char) way. (There was no prefix char - like #, & or such)
> 
> You can change the behavior in s_user.c
> in do_nick_name()
> remove
> if (isdigit(*nick) && !server) /* first character in [0..9] */
> return 0;
> and recompile.
> 
> But be aware that it may cause trouble!
> 
> Especially with the new 2.11 ircd - since this nick limitation is going to
> be used to have a unique id (a nick nobody can choose) to avoid killing a
> user after a nickname collision. The server will then automaticaly change
> your nick to such an UID instead
> of disconnecting you.
> 
> c'ya,
> fiction
> 
> 
> 
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