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The information required for two programs to communicate is stored in CPI-C side information entries in the SNAP-IX configuration file. Each side information entry is identified by a Symbolic Destination Name, which is the sym_dest_name parameter specified by the Initialize_Conversation call. The parameter sym_dest_name is an 8-byte ASCII character string and can contain any displayable characters. It contains the following fields:
Partner LU name
Partner program type and name
Mode name
Conversation security type (see Multiple Conversations)
Security user ID and password required to access the partner program
CPI-C also provides two mechanisms for an application to override the configured side information entries, as follows. Both of these mechanisms apply only to the application's own use of this information, and do not modify the original version stored in the configuration file.
The application can use the Set_CPIC_Side_Information, Extract_CPIC_Side_Information, and Delete_CPIC_Side_Information calls to manage its own local copy of complete side information entries. (These functions are not available in Java CPI-C.)
The application can use CPI-C Set_* functions (such as Set_Partner_LU_Name) to override an individual parameter from the side information before allocating the conversation.
For more information, see Side Information.
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