Hi, i have some devices that register properly (challenge/response) but can't challenge/response on INVITE and MESSAGE messages. turning accept-blind-auth on and changing some logic in mod_sofia got me to a satisfactory point concerning INVITE. i want to do the same for messages so i turned auth-messages on and was hoping that the same logic would apply when sending the message with devices that don't have to challenge/response besides register. i know what to change in sofia_presence_handle_sip_i_message but i would a session and it always comes up NULL, even with devices that have the capability to challenge/response, maybe session will only get a value for INVITE messages. what would be the best approach to make sip message perform a clean blind-auth like in INVITE without sending the proxy-authenticate back to the device ? sofia-lib / nua ? thank you.