pub fn peek_arp_types<B: SplitByteSlice>(
bytes: B,
) -> ParseResult<(ArpHardwareType, ArpNetworkType)>Expand description
Peek at an ARP header to see what hardware and protocol address types are used.
Since ArpPacket is statically typed with the hardware and protocol address
types expected in the header and body, these types must be known ahead of
time before calling parse. If multiple different types are valid in a
given parsing context, and so the caller cannot know ahead of time which
types to use, peek_arp_types can be used to peek at the header first to
figure out which static types should be used in a subsequent call to
parse.
Note that peek_arp_types only inspects certain fields in the header, and
so peek_arp_types succeeding does not guarantee that a subsequent call to
parse will also succeed.