ppp 2.3.0

A Proxy Protocol Parser written in Rust. See HAProxy for the protocol specification.
Documentation 
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//! Errors for the binary proxy protocol.

/// An error in parsing a binary PROXY protocol header.
#[derive(thiserror::Error, Debug, PartialEq)]
pub enum ParseError {
    #[error("Expected header to the protocol prefix plus 4 bytes after the prefix (length {0}).")]
    Incomplete(usize),
    #[error("Expected header to start with a prefix of '\\r\\n\\r\\n\\0\\r\\nQUIT\\n'.")]
    Prefix,
    #[error("Expected version {0:X} to be equal to 2.")]
    Version(u8),
    #[error("Invalid command {0:X}. Command must be one of: Local, Proxy.")]
    Command(u8),
    #[error(
        "Invalid Address Family {0:X}. Address Family must be one of: Unspecified, IPv4, IPv6, Unix."
    )]
    AddressFamily(u8),
    #[error("Invalid protocol {0:X}. Protocol must be one of: Unspecified, Stream, or Datagram.")]
    Protocol(u8),
    #[error("Header does not contain the advertised length of the address information and TLVs (has {0} out of {1} bytes).")]
    Partial(usize, usize),
    #[error(
        "Header length of {0} bytes cannot store the {1} bytes required for the address family."
    )]
    InvalidAddresses(usize, usize),
    #[error("Header is not long enough to contain TLV {0} with length {1}.")]
    InvalidTLV(u8, u16),
    #[error("Header contains leftover {0} bytes not accounted for by the address family or TLVs.")]
    Leftovers(usize),
}