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use failure::Error;
/// Data received right after initializing the connection
///
/// ConnAck is serialized sequentially
#[derive(Debug)]
pub struct ConnAck {
/// The Flag 0x01 for TLS
/// and 0x02 for Deflate Compression
pub flags: u8,
/// Some extra protocol version specific data
/// So far unused
pub extra: i16,
/// The version of the protocol
/// 0x00000001 for the legacy protocol
/// 0x00000002 for the datastream protocol
///
/// Only the datastream protocol is supported by this crate
pub version: i8,
}
impl Default for ConnAck {
fn default() -> Self {
Self {
flags: 0x00,
extra: 0x00,
version: 0x00000002,
}
}
}
impl crate::Serialize for ConnAck {
fn serialize(&self) -> Result<Vec<std::primitive::u8>, Error> {
let mut bytes: Vec<u8> = Vec::new();
bytes.append(&mut self.flags.serialize()?);
bytes.append(&mut self.extra.serialize()?);
bytes.append(&mut self.version.serialize()?);
Ok(bytes)
}
}
impl crate::Deserialize for ConnAck {
fn parse(b: &[u8]) -> Result<(usize, Self), Error> {
let (flen, flags) = u8::parse(b)?;
let (elen, extra) = i16::parse(&b[flen..])?;
let (vlen, version) = i8::parse(&b[(flen + elen)..])?;
return Ok((
flen + elen + vlen,
Self {
flags,
extra,
version,
},
));
}
}