HP-UX SNAplus2 MS Programmer's Guide

Writing MS Applications

Description of the MS API Entry Points

Chapter 2 41

• If an MDS-level application uses

REGISTER_NMVT_APPLICATION to receive incoming NMVTs

after conversion to MDS_MUs, it must be capable of receiving a data

length of 700 bytes, which allows for the maximum NMVT size

together with the MDS_MU header information. (This requirement

does not apply to an application using

REGISTER_MS_APPLICATION to receive MDS_MUs, because the

application can specify the maximum data length it can accept, and

SNAplus2 segments the data if necessary.)

• If an MDS-level application uses REGISTER_MS_APPLICATION to

receive incoming MDS_MUs, it must be capable of receiving data of

length up to the value speciﬁed for the

max_rcv_size

parameter on

the REGISTER_MS_APPLICATION verb.

Scope of Target Handle

Each application that needs to use MS must issue the

CONNECT_MS_NODE verb to obtain its own handle. No two MS

applications can use the same MS target handle.

In particular, if the application that issued CONNECT_MS_NODE later

forks to create a child process, the child process cannot issue any MS

verbs that use the target handle obtained by the parent process.

However, the child process can issue another CONNECT_MS_NODE to

obtain its own target handle.