From: "Hal E. Fulton" <hal9000@...>
Date: 2001-09-25T13:09:38+09:00
Subject: [ruby-talk:21654] IPSocket#addr

I'm seeing some behavior that is (to me)
unexpected.

I want to find the IP name at the other end
of a socket (I'm on the server side).

I'm using gets and puts for simplicity -- not
using recvfrom, so I can't use the extra info
it returns (unless I change my code).

Thought I would use #addr, since it returns
this info. I looked in The Book, and it says:

  u = UDPSocket.new
  u.bind('localhost', 8765)
  u.addr � ["AF_INET", 8765, "localhost", "127.0.0.1"]
  BasicSocket.do_not_reverse_lookup = true
  u.addr � ["AF_INET", 8765, "127.0.0.1", "127.0.0.1"]

This is under IPSocket (from which TCPSocket inherits).

Problem is, it always seems to give me an address, not
a name.

Noting the example above, I thought, "Well, maybe that
Boolean value doesn't default to false." So I set it to false.
But it hangs!

I wasn't sure whether I should actually use BasicSocket
or use the object -- tried it both ways, and it just hangs.

Ideas??

Hal