Function parse 

pub fn parse(buf: &[u8]) -> Result<(ProxyInfo, usize), ParseError>

Parse a Proxy Protocol header (v1 or v2) from a byte slice

Returns the parsed ProxyInfo and the number of bytes consumed.

Errors

• ParseError::Incomplete — the buffer does not yet contain a full header; the caller should read more data and retry
• ParseError::NotProxyProtocol — the first bytes do not match any Proxy Protocol signature
• ParseError::Invalid — the header is structurally malformed (bad version, unknown command, address family mismatch, truncated TLV, etc)
• ParseError::CrcMismatch — a CRC32c TLV is present and the checksum does not match