Re: problem with ipv6 address in libssh

[Bharath Kumar <bharath_vankadara@xxxxxxxxxxx>]

Hi,
         If i use the ipv6 address (::1), ssh_connect function returns success. 
         If i user the ipv6 address of the local machine (fe80::20c:29ff:feeb:c4f5) it is returning error and the ssh_get_error() is  "Socket error: Transport endpoint is not connected" and
         output of /usr/sbin/sshd -6 -d is
           
  <SYS_CTRLI0> root@sixthree:/opt/wasp/log # /usr/sbin/sshd -6 -d
debug1: sshd version OpenSSH_5.9p1 Debian-5ubuntu1
debug1: read PEM private key done: type RSA
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: private host key: #0 type 1 RSA
debug1: read PEM private key done: type DSA
debug1: Checking blacklist file /usr/share/ssh/blacklist.DSA-1024
debug1: Checking blacklist file /etc/ssh/blacklist.DSA-1024
debug1: private host key: #1 type 2 DSA
debug1: read PEM private key done: type ECDSA
debug1: Checking blacklist file /usr/share/ssh/blacklist.ECDSA-256
debug1: Checking blacklist file /etc/ssh/blacklist.ECDSA-256
debug1: private host key: #2 type 3 ECDSA
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-6'
debug1: rexec_argv[2]='-d'
Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 22 on ::.
Server listening on :: port 22.

What is the problem. Does libssh works for ipv6 addresses other than (::1) ?

Regards,
Bharath.         

________________________________
 From: Bharath Kumar <bharath_vankadara@xxxxxxxxxxx>
To: "libssh@xxxxxxxxxx" <libssh@xxxxxxxxxx> 
Sent: Monday, July 15, 2013 6:48 AM
Subject: Re: problem with ipv6 address in libssh
 


Hi,
        Where are the libssh logs stored ??

Regards,
Bharath.




________________________________
 From: Aris Adamantiadis <aris@xxxxxxxxxxxx>
To: Bharath Kumar <bharath_vankadara@xxxxxxxxxxx> 
Cc: "libssh@xxxxxxxxxx" <libssh@xxxxxxxxxx> 
Sent: Monday, July 15, 2013 6:00 AM
Subject: Re: problem with ipv6 address in libssh
 

Hi,

According to this log, it's working perfectly. Could you provide the log
generated by libssh itself ?
A sample of your code would be appreciated as well.

Aris

Le 15/07/13 11:50, Bharath Kumar a écrit :
> Hi,
> 
> I am using ssh_connect( ) function to connect to the address ::1(ipv6).
> But it is returning error.
> I ran sshd daemon in debug mode. Here is the output
> 
> 
> debug1: sshd version OpenSSH_5.9p1 Debian-5ubuntu1
> debug1: read PEM private key done: type RSA
> debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
> debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
> debug1: private host key: #0 type 1 RSA
> debug1: read PEM private key done: type DSA
> debug1: Checking blacklist file
 /usr/share/ssh/blacklist.DSA-1024
> debug1: Checking blacklist file /etc/ssh/blacklist.DSA-1024
> debug1: private host key: #1 type 2 DSA
> debug1: read PEM private key done: type ECDSA
> debug1: Checking blacklist file /usr/share/ssh/blacklist.ECDSA-256
> debug1: Checking blacklist file /etc/ssh/blacklist.ECDSA-256
> debug1: private host key: #2 type 3 ECDSA
> debug1: rexec_argv[0]='/usr/sbin/sshd'
> debug1: rexec_argv[1]='-d'
> Set /proc/self/oom_score_adj from 0 to -1000
> debug1: Bind to port 22 on ::1.
> Server listening on ::1 port 22.
> debug1: Server will not fork when running in debugging mode.
> debug1: rexec start in 4 out 4 newsock 4 pipe -1 sock 7
> debug1: inetd sockets after dupping: 3, 3
> Connection from ::1 port 60470
> debug1: Client protocol version 2.0; client software version libssh-0.5.2
> debug1: no match: libssh-0.5.2
>
 debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1
> debug1: permanently_set_uid: 116/65534 [preauth]
> debug1: list_hostkey_types: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256 [preauth]
> debug1: SSH2_MSG_KEXINIT sent [preauth]
> debug1: SSH2_MSG_KEXINIT received [preauth]
> debug1: kex: client->server aes256-ctr hmac-sha1 none [preauth]
> debug1: kex: server->client aes256-ctr hmac-sha1 none [preauth]
> debug1: expecting SSH2_MSG_KEXDH_INIT [preauth]
> debug1: SSH2_MSG_NEWKEYS sent [preauth]
> debug1: expecting SSH2_MSG_NEWKEYS [preauth]
> debug1: SSH2_MSG_NEWKEYS received [preauth]
> debug1: KEX done [preauth]
> debug1: userauth-request for user bharath service ssh-connection method
> password [preauth]
> debug1: attempt 0 failures 0 [preauth]
> debug1: PAM: initializing for
 "bharath"
> debug1: PAM: setting PAM_RHOST to "ip6-localhost"
> debug1: PAM: setting PAM_TTY to "ssh"
> debug1: PAM: password authentication accepted for bharath
> debug1: do_pam_account: called
> Accepted password for bharath from ::1 port 60470 ssh2
> debug1: monitor_read_log: child log fd closed
> debug1: monitor_child_preauth: bharath has been authenticated by
> privileged process
> debug1: PAM: establishing credentials
> User child is on pid 23594
> debug1: SELinux support disabled
> debug1: PAM: establishing credentials
> debug1: permanently_set_uid: 1000/1000
> debug1: Entering interactive session for SSH2.
> debug1: server_init_dispatch_20
> debug1: server_input_channel_open: ctype session rchan 43 win 64000 max
> 32768
> debug1: input_session_request
> debug1: channel 0: new [server-session]
> debug1: session_new: session
 0
> debug1: session_open: channel 0
> debug1: session_open: session 0: link with channel 0
> debug1: server_input_channel_open: confirm session
> debug1: server_input_channel_req: channel 0 request subsystem reply 1
> debug1: session_by_channel: session 0 channel 0
> debug1: session_input_channel_req: session 0 req subsystem
> subsystem request for sftp by user bharath
> debug1: subsystem: exec() /usr/lib/openssh/sftp-server
> 
> Is there anything wrong with this??
>