Version 6.2
527
February 2011
SIP User's Manual
8. IP Telephony Capabilities
8.4.9.2.34 Via
An example of the header is shown below:
Via: SIP/2.0/UDP 10.132.10.128;branch=z9hG4bKUGOKMQPAVFKTAVYDQPTB
The header properties as shown in the table below:
Header Level Action
Add
Delete
Modify
List Entries
Operations Supported
No
No
No
10
Keyword
Sub Types
Attributes
Alias Boolean
Read
Only
Branch String
Read
Only
Host
Host Structure (see ''Host''
on page
)
Read Only
MAddrIp gnTIPAddress
Read
Only
Param Param
Read/Write
Port Integer
Read
Only
TransportType
Enum TransportType (see
''TransportType'' on page
Read Only
Below is a header manipulation example:
Rule:
Check the transport type in the first Via header and if it's set to UDP, then modify the
From header's URL:
MessageManipulations 0 = 1, Invite.request,
"header.VIA.0.transporttype == '0'", header.from.url, 2,
'sip:3200@110.18.5.41;tusunami=0', 0;
Result:
From: <sip:3200@110.18.5.41;user=phone;tusunami=0>;tag=1c7874
8.4.9.2.35 Warning
An example of the header is shown below:
Warning: 307 isi.edu "Session parameter 'foo' not understood"
Warning: 301 isi.edu "Incompatible network address type 'E.164'"
The header properties as shown in the table below:
Header Level Action
Add
Delete
Modify
List Entries
Operations Supported
Yes
Yes
Yes
1
Keyword
Sub Types
Attributes
N/A N/A
N/A
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