PM58814: A LINEMODE CLIENT RECEIVES GARBLED DATA FROM TELNET SERVER

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A linemode (VT100) client connects to the Telnet server. TSO is
  entered as the target application. The 'HELP' command is entered
  from the TSO READY prompt. The HELP response, however, is
  garbled. Translation of EBCDIC newlines (x'15') into the ASCII
  string x'0D0A' does not always occur.  If DEBUG DETAIL is
  specified in the Telnet profile then the following message
  will also be produced:
  
  EZZ6035I TN3270 DEBUG CONN   DETAIL 755
    IP..PORT: ::FFFF:nn.nn.nn.nn..nnnn
    CONN: nnnnnnnn  LU: luname   MOD: EZBTPLMT
    RCODE: nnnn-00  Return code explanation not available.
    PARM1: 00000000 PARM2: 00000000 PARM3: 00000000
  
  Note: The RCODE will contain a random value.
  

Local fix

• Connect to the Telnet server with either a TN3270 or TN3270E
  type client.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of Communications Server for       *
  *                 z/OS Version 1 Release(s) 13 IP:             *
  *                 Telnet facilities                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: EBCDIC linefeed characters (x'15')      *
  *                      from TSO are not always being           *
  *                      converted to an ASCII x'0D0A'           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A linemode client connected to the Telnet server and
  logged on to TSO.  The HELP command was entered from
  the TSO READY prompt.  The response from the HELP
  command was incorrectly displayed at the client.
  Analysis of the data revealed that many of the EBCDIC
  newline characters (x'15') were not appropriately
  converted to the ASCII string x'0D0A' (Carriage
  return/linefeed).
  
  The following EZZ6035I message is displayed if Telnet
  DEBUG option is in effect:
  
  09.19.04  EZZ6035I TN3270 DEBUG CONN   DETAIL
    IP..PORT: x.xx.xxx.xxx..yyyy
    CONN: 00000014  LU: TCPM1152 MOD: EZBTPLMT
    RCODE: 54B4-00  Return code explanation not available.
    PARM1: 00000000 PARM2: 00000000 PARM3: 00000000
  
  Translation errors also occurred when data containing
  a large number of EBCDIC newlines was received from the
  host application.
  +-------------------------------------------------------------+
  + Please check our Communications Server for OS/390 homepages +
  + for common networking tips and fixes.  The URL for these    +
  + homepages can be found in Informational APAR II11334.       +
  +-------------------------------------------------------------+
  

Problem conclusion

• Module EZBTPLMT has been amended to ensure correct
  allocation for the transient buffer used to perform
  EBCDIC to ASCII translation.
  
  * Cross Reference between External and Internal Names
  

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:

  UK76708

Modules/Macros

• EZBTPLMT
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R1D0 PSY UK76708

     UP12/04/03 P F204

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.