[reSIProcate-users] a question about maddr param

[吴振宇 <ssosun@xxxxxxxxx>]

hi,all
     i get a question when i learn rfc3261 in detail,then see the resip code.
     18.2.2 Sending Responses:
"Otherwise, if the Via header field value contains a "maddr"
         parameter, the response MUST be forwarded to the address listed
         there, using the port indicated in "sent-by", or port 5060 if
         none is present.  If the address is a multicast address, the
         response SHOULD be sent using the TTL indicated in the "ttl"
         parameter, or with a TTL of 1 if that parameter is not present."

sending response may use maddr.

19.1 SIP and SIPS Uniform Resource Indicators:
"The maddr parameter indicates the server address to be
         contacted for this user, overriding any address derived from
         the host field.  When an maddr parameter is present, the port
         and transport components of the URI apply to the address
         indicated in the maddr parameter value.  [4] describes the
         proper interpretation of the transport, maddr, and hostport in
         order to obtain the destination address, port, and transport
         for sending a request."

then i see the sendToWire function of  transactionstate.cxx,i can't
find the process of the maddr param.
are there some process of this at other postion?
ps: i don't test this