SAC Messages

The format of messages from the SAC is defined by the structure sacmsg:

struct sacmsg {
 	int sc_size; /* size of optional data portion */
 	char sc_type; /* type of message */
};

The SAC can send four types of messages to port monitors. The type of message is indicated by setting the sc_type field of the sacmsg structure to one of the following:

• SC_STATUS status request.

• SC_ENABLE enable message.

• SC_DISABLE disable message.

• SC_READDB message indicating that the port monitor's _pmtab file should be read.

• sc_size indicates the size of the optional data part of the message. See Message Classes. For the Solaris environment, sc_size should always be set to 0.

A port monitor must respond to every message sent by the SAC.