ProtocolFor
KPPPProtocol *protocol = ProtocolFor(protocolNumber);
ProtocolFor(protocolNumber, protocol->NextProtocol()) : NULL;
KPPPProtocol *protocol = ProtocolFor(protocolNumber);
ProtocolFor(protocolNumber, protocol->NextProtocol()) : NULL) {
KPPPProtocol *authenticator = Interface().ProtocolFor(ntohs(item->protocolNumber));
fLocalAuthenticator = Interface().ProtocolFor(ntohs(item->protocolNumber));
KPPPProtocol *ProtocolFor(uint16 protocolNumber,