Help with Async transaction responses - sr-users

19 Nov 2021

Hello,
I am attempting to perform some asynchronous lookup upon receiving an INVITE and then
reply with a 3xx response with a modified From header.  My workflow now is to create a
transaction when receiving the INVITE, suspend the transaction, perform the asynchronous
lookup, continue the transaction upon response, and then modify the From header and reply.
 The ONLY problem I am having is modifying the From header!  How can I modify the From
header in this scenario?

function ksr_request_route()
    if KSR.is_INVITE() then
      if KSR.tm.t_newtran() then
            cache_transaction_info()
            KSR.tmx.t_suspend()
            --perform async loookup
        end
    end
    return 1
end

--This function called on response from async lookup. Equivalent of ONREPLY_ROUTE
function ksr_reply_route()
    --Finds the transaction_index and transaction_label from a cache
    KSR.tmx.t_continue(transaction_index, transaction_label,
"redirect_transaction");
    KSR.x.drop()
    return 1
end

function redirect_transaction()
    KSR.pv.sets("$fU", "Jenny") --Doesn't actually modify the from
username for 302 response!
    KSR.tm.t_reply(302, "Redirecting")
    return 1
end

Thank you much!
-Michael