TCP/IP support is provided by the CICS® sockets
domain, with network services supplied by z/OS®. The sockets
domain provides support for:
- The listener
- The listener monitors specified TCP/IP ports for incoming requests.
It is configured by a TCPIPSERVICE resource definition to listen
on a specific TCP/IP port and to attach a specified request receiver
transaction to handle each connection. Once the connection has
been established between a client program and a particular request
receiver, all subsequent requests from the client program over that
connection flow to the same request receiver. The listener supports
user applications initiated by TCP/IP services for the following protocols:
- External Call Interface (ECI)
- The External Call Interface (ECI) allows client applications
to use TCP/IP directly to CICS regions without any intervening
products such as protocol-mapping software. The External Call Interface
(ECI) is supported, but not the External Presentation Interface (EPI).
See the CICS Family: Communicating from CICS on System/390® manual for information
about the External Call Interface.
- Hypertext Transfer Protocol (HTTP)
- HTTP messages are received and sent over the Internet, using CICS Web
support. See the CICS Internet Guide for information
about the transmission of HTTP messages on the Web.
- Internet InterORB Protocol (IIOP)
- IIOP messages are sent between client and server applications
that conform to the Common Object request Broker Architecture (CORBA).
See the Java™ Applications in CICS manual for information
about IIOP messages.
- Outbound socket support
- This allows CICS to initiate an IP connection.
Sockets can be created by one task, shared by other tasks, and remain
active after task termination, for re-use by another task.
[[ Contents Previous Page | Next Page Index ]]