[asterisk-users] Finding the user agent of a channel using PJSIP?

[John Kiniston]

I'm working on my sip to pjsip translation.

Right now I do some functionality based on what the user agent is on the
calling phone using:

${SIPPEER(${CHANNEL(peername)},useragent)}

I'm trying to replace it with

PJSIP_CONTACT(${CHANNEL(contact)},user-agent}) but I'm not getting any data
returned when I query ${CHANNEL(contact)}

Is there a different function I should use to get my needed user agent of
the active call?
-- 
A human being should be able to change a diaper, plan an invasion, butcher
a hog, conn a ship, design a building, write a sonnet, balance accounts,
build a wall, set a bone, comfort the dying, take orders, give orders,
cooperate, act alone, solve equations, analyze a new problem, pitch manure,
program a computer, cook a tasty meal, fight efficiently, die gallantly.
Specialization is for insects.
---Heinlein
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