PH03785: USING SMC-D WITH TLS DSNL511I @ DSNLIENO TCP/IP CONVERSATION FAILED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Using SMC with AT-TLS the connection comes up ok and data is
  sent
  over the SMC connection which quickly fails with DSNL511I @
  DSNLIENO TCP/IP CONVERSATION FAILED
  
  TO LOCATION ::xxxx:xx.xx.xx.xx
  IPADDR=::xxxx:xx.xx.xx.xx
  PORT=xxxxx
  SOCKET=SENDMSG RETURN CODE=140 REASON
  CODE=77F37242
  DSNL511I @ DSNLIENO TCP/IP CONVERSATION FAILED
  
  TO LOCATION
  IPADDR=::xxxx:xx.xx.xx.xx
  PORT=xxxx
  SOCKET=CONNECT RETURN CODE=1128 REASON
  CODE=76630291
  
  SMC-R SMCR SMC-D SMCD AT-TLS ATTLS
  ASYNC RECV COMMON BUFFERS
  SHARED MEMORY OBJECTS SMO
  

Local fix

• turn off TLS for this connection.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the IBM Communications Server for z/OS Version  *
  * 2 Releases 2 and 3 IP: AT-TLS and SMC                        *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * An async receive using common buffers can cause an AT-TLS    *
  * data decryption failure for an SMC connection.               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply the PTF                                                *
  ****************************************************************
  The async receive with common buffers caused a recursive call to
  the data decryption routine for the same data. This caused the
  data decryption to fail and the connection to be terminated.
  

Problem conclusion

• The code was changed to update the data address before the
  recursive call so that the recursive call will decrypt new data.
  

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:

  UI59391 UI59393

Modules/Macros

• EZBTLFWR EZBTCFWR EZBTCFRD EZBLCINB EZBT6FWR EZBTLSRH EZBTLFIO
  EZBT6LWR EZBSCINB EZBTCRD
  

Fix information

• Fixed component name

  TCP/IP MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R220 PSY UI59391

     UP18/12/11 P F812

• R230 PSY UI59393

     UP18/12/12 P F812

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.