STREAMS Programming Guide

Message Linkage

A complex message can consist of several linked message blocks. If buffer size is limited or if processing expands the message, multiple message blocks are formed in the message, as shown in Figure 7–2. When a message is composed of multiple message blocks, the type associated with the first message block determines the overall message type, regardless of the types of the attached message blocks.

Figure 7–2 Linked Message Blocks

Diagram shows a complex message composed of linked message blocks.