I tried latest Linphone and when it tried to register, K complained:
Sep 13 20:56:06 box /usr/bin/sip-proxy[111574]: WARNING: registrar [sip_msg.c:194]:
check_contacts(): contact uri is too long:
[sip:username@host:port;app-id=929724111839;pn-type=firebase;pn-tok=dYqC3AnzCxI:APA91bF84yDlViEZtJyuUd-9icZYAxsn0f8AAsV97kYzBiSo1uu1VRcI6IWsUQP8evlYCltEHJpjKf9alnyIxcRiRaVDugu4CF7ZgaI3vVw2Ls22mW6K7TGJJ90iTs7g-G1sE5oVTdC1;pn-silent=1;transport=tls]
I haven't checked yet, what RFC 3261 says about length of contact uri
(if anything).
Comments?
-- Juha