Require

An example of the header is shown below:

Require: 100rel

The header properties are shown in the following table:

Header Level Action

Add

Delete

Modify

List Entries

Operations Supported

Yes

Yes

Yes

N/A

Keyword

Sub Types

Attributes

Capabilities

SIPCapabilities Struct

Read/Write

Below are header manipulation examples:

Example 1

Rule:

Add a Require header to all messages:

MessageManipulations 1 = 1, , ,header.require, 0, 'early-session,em,replaces', 0;

Result:

 
Require: em,replaces,early-session

Example 2

Rule:

If a Require header exists, then delete it:

MessageManipulations 2 = 1, Invite, header.require exists ,header.require, 1, '', 0;

Result:

The Require header is deleted.

Example 3

Rule:

Set the early media options tag in the header:

MessageManipulations 0 = 0, invite, , header.require.capabilities.earlymedia, 0, 1 , 0;

Result:

 
Require: em,replaces,early-session, early-media

Example 4

Rule:

Set the privacy options tag in the Require header:

MessageManipulations 0 = 0, invite, , header.require.capabilities.privacy, 0, 1 , 0;

Result:

 
Require: em,replaces,early-session, privacy