IO08105: WINSCP SFTP CLIENT CANNOT CONNECT TO 4690 SFTP SERVER.

APAR status

• Closed as program error.

Error description

• Customer is unable to login to 4690 SFTP server from Windows
  client.  They use WinSCP as a SFTP client.  4690 V5R1 07G0 is
  running on the controller.  We can connect from 4690 SFTP
  client, so 4690 server must be configured correctly.
  .
  
  Following controller events are logged on the controller even
  even though the message "error listing directory 'c:'." is
  displayed on the client side.
  .
  ----------------------------------------------------------------
   11/28 12:09 CC     5 W891 FTP logout ID=4690
                              B4/S247/E030
   SOURCE: Unknown
   UNIQUE DATA:  343639300000000000000000006F6E001700
  *4690.........on...*
   ---------------------------------------------------------------
    11/28 12:09 CC     5 W890 FTP login ID=4690
                              B4/S247/E030
   SOURCE: Unknown
   UNIQUE DATA:  343639300000000000000000000000000000
  *4690..............*
   ---------------------------------------------------------------
    11/28 12:09 CC     5 W889 FTP connection from 10.47.99.100
                              B4/S247/E030
   SOURCE: Unknown
   UNIQUE DATA:  31302E34372E39392E313030000000000000
  *10.47.99.100......*
  ---------------------------------------------------------------
  .
   Following message is logged in WinSCP.log.
   . 2007-11-28 11:09:43.906 Server unexpectedly closed network
  connection
   * 2007-11-28 11:09:43.921 (ESshFatal) Server unexpectedly
  closed network connection.
  

Local fix

Problem summary

• When a SFTP client was sending the path "C:", the
  4690 sftp server was getting a null pointer
  trying to find the '/' character. The client sends this
  path when trying to perform function SSH2_FXP_OPENDIR
  which returns a directory on the path sent to the server.
  

Problem conclusion

• A null pointer validation was added to the function
  strchr() in case there is no '/' in the path
  sent by the client. This validation lets the code continue
  command validation and confirm that the path is correct.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  IO08694

Modules/Macros

• SFTP-SER ADXSSHPL
  

Fix information

• Fixed component name

  IBM 4690OS V5

• Fixed component ID

  5639GG100

Applicable component levels

• R101 PSY UO00730

     UP08/05/05 P 08G0