| Subject: | Hung when connecting Linux SSH servier on Windows(win7, winxp) |
Steps to reproduce the problem:
Run following testing script. It will hang on the lines.
Testing Scripts:
#! /usr/bin/perl
use strict;
use warnings;
use Socket qw{ :crlf };
use Net::SSH::Perl;
my $ssh = Net::SSH::Perl->new(
"192.168.22.170",
(
debug => 1,
protocol => '2,1',
)
);
$ssh->login("root", "rootpassword");
my ($o, $e, $rv) = $ssh->cmd("ls", "\n");
print STDERR "\$o = $o\n";
print STDERR "\$e = $e\n";
print STDERR "\$rv = $rv\n";
Trace of the testing script:
alphatan-x200: Reading configuration data C:\Users\alphatan/.ssh/config
alphatan-x200: Reading configuration data /etc/ssh_config
alphatan-x200: Connecting to sdf.org, port 22.
alphatan-x200: Remote protocol version 1.99, remote software version
OpenSSH_5.8
alphatan-x200: Net::SSH::Perl Version 1.34, protocol version 2.0.
alphatan-x200: No compat match: OpenSSH_5.8.
alphatan-x200: Connection established.
alphatan-x200: Sent key-exchange init (KEXINIT), wait response.
alphatan-x200: Algorithms, c->s: 3des-cbc hmac-sha1 none
alphatan-x200: Algorithms, s->c: 3des-cbc hmac-sha1 none
alphatan-x200: Entering Diffie-Hellman Group 1 key exchange.
alphatan-x200: Sent DH public key, waiting for reply.
alphatan-x200: Received host key, type 'ssh-dss'.
alphatan-x200: Host 'sdf.org' is known and matches the host key.
alphatan-x200: Computing shared secret key.
alphatan-x200: Verifying server signature.
alphatan-x200: Waiting for NEWKEYS message.
alphatan-x200: Send NEWKEYS.
alphatan-x200: Enabling encryption/MAC/compression.
alphatan-x200: Sending request for user-authentication service.
alphatan-x200: Service accepted: ssh-userauth.
alphatan-x200: Trying empty user-authentication request.
alphatan-x200: Authentication methods that can continue:
publickey,password,keyboard-interactive,hostbased.
alphatan-x200: Next method to try is publickey.
alphatan-x200: Next method to try is password.
alphatan-x200: Trying password authentication.
alphatan-x200: Login completed, opening dummy shell channel.
alphatan-x200: channel 0: new [client-session]
alphatan-x200: Requesting channel_open for channel 0.
alphatan-x200: channel 0: open confirm rwindow 0 rmax 32768
alphatan-x200: Got channel open confirmation, requesting shell.
alphatan-x200: Requesting service shell on channel 0.
alphatan-x200: channel 1: new [client-session]
alphatan-x200: Requesting channel_open for channel 1.
alphatan-x200: Entering interactive session.
alphatan-x200: Sending command: ls
alphatan-x200: Sending command: ls
alphatan-x200: Requesting service exec on channel 1.
alphatan-x200: channel 1: send eof
alphatan-x200: channel 1: open confirm rwindow 2097151 rmax 32768
Guess on the reason(May not be right, but just a hint):
It may be caused by the CRLF notions on socket operations. After
creating a new socket, call 'binmode(SOCK, ":raw:perlio")' to make it
raw mode and setting 'local $/=CRLF;' before reading and append $CRLF as
line separator;
Distribution Name and Version:
Net::SSH::Perl 1.34
Perl Version
osname=MSWin32, osvers=5.1, archname=MSWin32-x86-multi-thread
uname='Win32 strawberryperl 5.12.2.0 #1 Fri Nov 5 05:17:27 2010 i386'
Operating System vendor and version
WinXP and Win7