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//! Handles parsing of UDP header
use nom::be_u16;
#[derive(Debug, PartialEq, Eq)]
#[cfg_attr(feature = "derive", derive(Serialize, Deserialize))]
pub struct UdpHeader {
pub source_port: u16,
pub dest_port: u16,
pub length: u16,
pub checksum: u16,
}
named!(pub parse_udp_header<&[u8], UdpHeader>, do_parse!(
source_port: be_u16 >>
dest_port: be_u16 >>
length: be_u16 >>
checksum: be_u16 >>
(
UdpHeader{source_port: source_port, dest_port: dest_port, length: length, checksum: checksum}
)
));
#[cfg(test)]
mod tests {
use super::{UdpHeader, parse_udp_header};
const EMPTY_SLICE: &'static [u8] = &[];
#[test]
fn udp_header_works() {
let bytes = [0x00, 0x12, 0x11, 0x11, // source & destination ports
0x00, 0x1b, 0x21, 0x0f, // length & checksum
];
let expectation = UdpHeader {
source_port: 0x12,
dest_port: 0x1111,
length: 0x1b,
checksum: 0x210f,
};
assert_eq!(parse_udp_header(&bytes), Ok((EMPTY_SLICE, expectation)));
}
}
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