Registrator constructor
Implementation
Registrator(PitelUA ua, [Transport? transport]) {
int regId = 1; // Force reg_id to 1.
_ua = ua;
_transport = transport;
_registrar = ua.configuration!.registrarServer;
_expires = ua.configuration!.registerExpires;
// Call-ID and CSeq values RFC3261 10.2.
_callId = utils.createRandomToken(22);
_cseq = 0;
_toUri = ua.configuration!.uri;
_registrationTimer = null;
// Ongoing Register request.
_registering = false;
// Set status.
_registered = false;
// Contact header.
_contact = _ua!.contact.toString();
// Sip.ice media feature tag (RFC 5768).
_contact += ';+sip.ice';
// Custom headers for REGISTER and un-REGISTER.
_extraHeaders = <String>[];
// Custom Contact header params for REGISTER and un-REGISTER.
_extraContactParams = '';
// Custom Contact URI params for REGISTER and un-REGISTER.
setExtraContactUriParams(ua.configuration!.registerExtraContactUriParams);
_contact += ';reg-id=$regId';
_contact += ';+sip.instance="<urn:uuid:${_ua!.configuration!.instanceId}>"';
}