NetIPC 3000/XL Programmer's Reference Manual (5958-8600)

Table Of Contents

122 Chapter3

NetIPC Intrinsics

IPCSHUTDOWN

• Data is being sent from the connection. This could occur, for

example, if IPCSEND was called in nowait mode and has not yet

completed.

Cross-System Considerations For TCP

The following are cross-system programming considerations for this

intrinsic:

HP 3000 to HP 1000: Socket shut down — The HP 3000 provides a

graceful release ﬂag (flag 17) that is not available on the HP 1000. Do

not set the graceful release ﬂag on the HP 3000. Otherwise, the

HP 1000 will not perform a normal shutdown. If the HP 3000 process

sets the graceful release ﬂag, the HP 1000 IPCRecv call will return a

NetIPC error 68 (No more data). The HP 1000 process should handle

error 68 as if it were an error 64 (Connection aborted by peer). After

receiving an error 68, subsequent IPCRecv calls on the HP 1000 will

return an error 109 (Remote connection has already graceful released

the socket).

HP 3000 to HP 9000: Socket shut down — The HP 3000 provides a

graceful release ﬂag that is not available on the HP 9000. If the graceful

release ﬂag (flag 17) is set on the HP 3000, the HP 9000 will respond

as though it were a normal shutdown. The HP 3000 does not support

shared sockets; the HP 9000 does. Shared sockets are destroyed only

when the descriptor being released is the sole descriptor for that socket.

Therefore, the HP 9000 process may take longer to close the connection

than expected.

HP 3000 to PC NetIPC: Socket shut down — The HP 3000

provides a graceful release ﬂag that is not available on the PC. If the

graceful release ﬂag (flag 17) is set on the HP 3000, the PC will

respond as though it were a normal shutdown.