cip Directory Reference

Files
	cip.cpp
	CIP message request builder + response parser (pure, host-tested; constants per Wireshark).
	cip.h
	CIP (Common Industrial Protocol) message codec (PC_ENABLE_CIP) - zero-heap request builder + response parser for the message that rides inside an EtherNet/IP Unconnected Data item (services/fieldbus/enip). Together they form a working CIP read path.