rlp.h

ACN Root Layer Protocol and Networking Interface

Summary
rlp.hACN Root Layer Protocol and Networking Interface
rxbuf_sAt minimum, the rxbuffer needs a usecount attaching.

rxbuf_s

typedef struct rxbuf_s rxbuf_s

At minimum, the rxbuffer needs a usecount attaching.  There are several possibilities.

  • Define a structure with the usecount ahead of the data.  This allows a size field too and variable size data blocks.  However, it does not work in an OS/Stack where the raw packet is used and the space ahead of the data is filled with UDP and IP headers.
  • As previous, but in the case of a stack supplying a raw packet, the UDP/IP headers get overwritten by the usecount.  Only works if the stack will tolerate this.
  • Place the usecount after the end of the data.  This limits the data buffer to a fixed size so we know where the usecount is.
  • Use a separate structure supplying the usecount and a pointer to the data buffer.  This adds the overhead of memory management for a very small structure.  In many impolementations, the pointer to the buffer is bigger than the whole of the rest of the structure.

The definition here assumes the first.

typedef struct rxbuf_s rxbuf_s
At minimum, the rxbuffer needs a usecount attaching.
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