From: "Grzegorz M." <marszalki@...>
Date: 2011-10-05T22:12:02+09:00
Subject: net-ssh problem with port forwarding

Hello!

I'm trying to forward few ports via ssh - this is only reason I use
net::ssh.

I've tried following code on windows - both newest ruby 1.8.7 and 1.9.2
from rubyinstaller.

log = Logger.new(STDOUT)
ssh = Net::SSH.start($sshconfig["sshhost"], $sshconfig["sshaccount"],
{:port => $sshconfig["sshport"], :config => false, :key_data =>
[$sshconfig["sshkey"]], :keys_only => true, :logger => log})
ssh.forward.local(222, "10.213.0.6", 223)
ssh.forward.remote(222, "localhost", 10000)
ssh.loop { true }

It works, but each time I try to connect to localhost:222 from windows,
OR localhost:222 on remote server, I get following error:

E, [2011-10-05T15:08:45.343750 #29848] ERROR --
net.ssh.connection.session[b93ed
4]: channel_open_failed: 1 2 Connection refused
E, [2011-10-05T15:08:45.343750 #29848] ERROR --
net.ssh.connection.channel[b7204
0]: could not establish direct channel: Connection refused (2)
C:/Ruby192/lib/ruby/gems/1.9.1/gems/net-ssh-2.2.1/lib/net/ssh/ruby_compat.rb:22:
in `select': closed stream (IOError)
        from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/net-ssh-2.2.1/lib/net/ssh/ruby_
compat.rb:22:in `io_select'
        from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/net-ssh-2.2.1/lib/net/ssh/conne
ction/session.rb:201:in `process'
        from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/net-ssh-2.2.1/lib/net/ssh/conne
ction/session.rb:161:in `block in loop'
        from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/net-ssh-2.2.1/lib/net/ssh/conne
ction/session.rb:161:in `loop'
        from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/net-ssh-2.2.1/lib/net/ssh/conne
ction/session.rb:161:in `loop'
        from test.rb:44:in `<main>'

I understand, what's that mean - there is nothing listening on the other
side of forwarded connection - BUT why it crashes with so bizzare
exception?

I expect in my code this to by not so uncommon situation - I forward
remote port to local service, which is ie.: restarting in this
particualr moment. Then - bam! Whole app is crashing.

Is that a bug? Or maybe I just don't know how to tell net-ssh to ignore
such errors, log it and continue loop? Any ideas?

-- 
Posted via http://www.ruby-forum.com/.