From: Dave Thomas <Dave@...>
Date: 2001-02-04T05:16:45+09:00
Subject: [ruby-talk:10319] Re: TCPServer - bug in documentation ?

Michael Neumann <neumann@s-direktnet.de> writes:

> It seems to be, that there's either an bug in TCPServer, or
> the description in "Programming Ruby" is wrong.

I'd always assume the latter ;-)

> 
> The book says about TCPServer.new, that if a host is omitted, it
> will listen on *all* interfaces (equivalent to "0.0.0.0").

That's very strange, because on my box 

> But that's not the case.
> 
> I tried following code:
>   require "socket"
>   s = TCPServer.new(8080)
>   s.accept
> 
> Then 'telnet 192.168.1.1 8080' and got a "Connection refused".
> (192.168.1.1 is my local IP-adress) But 'telnet localhost 8080'
> works!!!  (where localhost is 127.0.0.1)

   dave[ext/socket 14:11:50] ruby -v -e'p RUBY_PLATFORM'
   ruby 1.6.2 (2001-02-02) [i686-linux]
   "i686-linux"

   dave[ext/socket 14:13:10] ruby -r socket -e 's=TCPServer.new(5678);loop{s.accept}'&

   dave[ext/socket 14:13:48] telnet localhost 5678
   Trying 127.0.0.1...
   Connected to localhost.
   Escape character is '^]'.
   ^]
   telnet> Connection closed.

   dave[ext/socket 14:14:02] telnet zip.local.thomases.com 5678
   Trying 10.96.0.14...
   Connected to zip.local.thomases.com.
   Escape character is '^]'.
   ^]
   telnet> Connection closed.


So, we seem to have some kind of different behavior between us. That's 
interesting, because Guy and I are also experiencing a different in
TCP behavior.

I'm wondering if this might be a libc issue?

Anyone with networking experience any ideas?


Dave