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use {Name, Error};
use byteorder::{BigEndian, ByteOrder};
#[derive(Debug, Clone, Copy)]
pub struct Record<'a> {
pub priority: u16,
pub weight: u16,
pub port: u16,
pub target: Name<'a>,
}
impl<'a> super::Record<'a> for Record<'a> {
const TYPE: isize = 33;
fn parse(rdata: &'a [u8], original: &'a [u8]) -> super::RDataResult<'a> {
if rdata.len() < 7 {
return Err(Error::WrongRdataLength);
}
let record = Record {
priority: BigEndian::read_u16(&rdata[..2]),
weight: BigEndian::read_u16(&rdata[2..4]),
port: BigEndian::read_u16(&rdata[4..6]),
target: Name::scan(&rdata[6..], original)?,
};
Ok(super::RData::SRV(record))
}
}
#[cfg(test)]
mod test {
use {Packet, Header};
use Opcode::*;
use ResponseCode::NoError;
use QueryType as QT;
use QueryClass as QC;
use Class as C;
use RData;
use super::*;
#[test]
fn parse_response() {
let response = b"[\xd9\x81\x80\x00\x01\x00\x05\x00\x00\x00\x00\
\x0c_xmpp-server\x04_tcp\x05gmail\x03com\x00\x00!\x00\x01\
\xc0\x0c\x00!\x00\x01\x00\x00\x03\x84\x00 \x00\x05\x00\x00\
\x14\x95\x0bxmpp-server\x01l\x06google\x03com\x00\xc0\x0c\x00!\
\x00\x01\x00\x00\x03\x84\x00%\x00\x14\x00\x00\x14\x95\
\x04alt3\x0bxmpp-server\x01l\x06google\x03com\x00\
\xc0\x0c\x00!\x00\x01\x00\x00\x03\x84\x00%\x00\x14\x00\x00\
\x14\x95\x04alt1\x0bxmpp-server\x01l\x06google\x03com\x00\
\xc0\x0c\x00!\x00\x01\x00\x00\x03\x84\x00%\x00\x14\x00\x00\
\x14\x95\x04alt2\x0bxmpp-server\x01l\x06google\x03com\x00\
\xc0\x0c\x00!\x00\x01\x00\x00\x03\x84\x00%\x00\x14\x00\x00\
\x14\x95\x04alt4\x0bxmpp-server\x01l\x06google\x03com\x00";
let packet = Packet::parse(response).unwrap();
assert_eq!(packet.header, Header {
id: 23513,
query: false,
opcode: StandardQuery,
authoritative: false,
truncated: false,
recursion_desired: true,
recursion_available: true,
authenticated_data: false,
checking_disabled: false,
response_code: NoError,
questions: 1,
answers: 5,
nameservers: 0,
additional: 0,
});
assert_eq!(packet.questions.len(), 1);
assert_eq!(packet.questions[0].qtype, QT::SRV);
assert_eq!(packet.questions[0].qclass, QC::IN);
assert_eq!(&packet.questions[0].qname.to_string()[..],
"_xmpp-server._tcp.gmail.com");
assert_eq!(packet.answers.len(), 5);
let items = vec![
(5, 0, 5269, "xmpp-server.l.google.com"),
(20, 0, 5269, "alt3.xmpp-server.l.google.com"),
(20, 0, 5269, "alt1.xmpp-server.l.google.com"),
(20, 0, 5269, "alt2.xmpp-server.l.google.com"),
(20, 0, 5269, "alt4.xmpp-server.l.google.com"),
];
for i in 0..5 {
assert_eq!(&packet.answers[i].name.to_string()[..],
"_xmpp-server._tcp.gmail.com");
assert_eq!(packet.answers[i].cls, C::IN);
assert_eq!(packet.answers[i].ttl, 900);
match *&packet.answers[i].data {
RData::SRV(Record { priority, weight, port, target }) => {
assert_eq!(priority, items[i].0);
assert_eq!(weight, items[i].1);
assert_eq!(port, items[i].2);
assert_eq!(target.to_string(), (items[i].3).to_string());
}
ref x => panic!("Wrong rdata {:?}", x),
}
}
}
}