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Function create should create a new frame to be transmitted. While function parse will be called for parsing a received frame.

Function ''create'' should create a new frame to be transmitted. While function ''parse'' will be called for parsing a received frame.

The ''Framer'' type ''framer-nullmac'' is defined by files ''core/net/mac/framer-nullmac.c'' and ''core/net/mac/framer-nullmac.h''. It should be used together with ''nullmac'' (MAC layer). The auxiliary function simply populate the 2 fields of ''nullmac_hdr'', which are: receiver address and sender address. This is the very basic type of ''Framer'' that can be used on ''ContikiOS''.

The ''Framer'' type ''framer-nullmac'' is defined by files ''core/net/mac/framer-nullmac.c'' and ''core/net/mac/framer-nullmac.h''. It should be used together with ''nullmac'' (MAC layer). The auxiliary function simply fill in the 2 fields of ''nullmac_hdr'', which are: receiver address and sender address. This is the very basic type of ''Framer'' that can be used on ''ContikiOS''.