gtpc1m0l | Transmission Control Protocol/Internet Protocol |
TPF Common Link Access to Workstation (CLAW) system services enables the TPF CLAW device interface to receive inbound messages from the TCP/IP offload device by sending an internal RECEIVE request to the TPF CLAW device interface. When TPF CLAW system services receives a message from the TCP/IP offload device, TPF CLAW system services forwards the message to TPF CLAW system services. TPF CLAW system services determines whether the message is to be forwarded to socket OPZERO or to the generic entry point (EP). If TPF CLAW system services forwards the message to socket OPZERO, socket OPZERO returns the message to the socket application either directly or through socket API support. If TPF CLAW system services forwards the message to the generic EP, generic EP enters the appropriate CLAW EP program to display information regarding the message on the TPF console.
Figure 10 shows an inbound message flow through the TCP/IP support components from the TCP/IP offload device.
Figure 10. Inbound Message Flow
The following describes the inbound message flow for a message received from the TCP/IP offload device:
The generic EP forwards the unsolicited message to the appropriate CLAW EP program, which displays information regarding the message on the TPF console. The following CLAW EP programs are entered from the generic EP.