HP-UX C SIP Stack Message Layer Reference Guide (February 2008)

CSeq Header Functions 399

CSEQ HEADER FUNCTIONS

CSeq header functions enable you to construct, copy, encode, parse, access and

change CSeq header parameters. This section contains CSeq header functions

found in the RvSipCSeqHeader.h header file.

CSEQ WORKING MODES

The two working modes with the CSeq header utility functions are as follows:

Signed numeric CSeq value, which means that the maximum

numeric value of the CSeq is 2^31-1. Consequently, an un-

initialized numeric CSeq value is represented by the (-1) value.

This mode is defined in RFC 3261, section 8.1.1.5, and thus is

the default Stack mode.

Unsigned numeric CSeq value, which means that the maximum

numeric value of the CSeq is 2^32-1. This mode is defined in

RFC 3261, section 20.16. To work in this mode, the

RV_SIP_UNSIGNED_CSEQ compilation flag must be set.

Note Turning on the RV_SIP_UNSIGNED_CSEQ compilation

flag changes the prototype definition of the

RvSipCSeqHeaderGetStep() function.

The functions included in this section are:

Control Functions