79 lines
2.2 KiB
Rust
79 lines
2.2 KiB
Rust
use bytes::Bytes;
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use errors::*;
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use ser::packet::{DnsPacketData, DnsPacketWriteContext};
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use ser::text::{DnsTextData, DnsTextFormatter, DnsTextContext, next_field};
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use std::fmt;
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use std::io::Cursor;
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mod epoch;
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/// timestamp in seconds since epoch (ignoring leap seconds)
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///
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/// Is expected to wrap around.
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#[derive(Clone, PartialEq, Eq, Debug)]
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pub struct Time(pub u32);
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impl DnsPacketData for Time {
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fn deserialize(data: &mut Cursor<Bytes>) -> Result<Self> {
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Ok(Time(DnsPacketData::deserialize(data)?))
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}
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fn serialize(&self, context: &mut DnsPacketWriteContext, packet: &mut Vec<u8>) -> Result<()> {
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self.0.serialize(context, packet)
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}
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}
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impl DnsTextData for Time {
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fn dns_parse(_context: &DnsTextContext, data: &mut &str) -> ::errors::Result<Self> {
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let field = next_field(data)?;
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let epoch = field.parse::<u32>();
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if field.len() == 14 && epoch.is_err() {
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let tm = epoch::Tm::parse_YYYYMMDDHHmmSS(field)?;
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Ok(Time(tm.epoch() as u32))
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} else {
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Ok(Time(epoch?))
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}
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}
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fn dns_format(&self, f: &mut DnsTextFormatter) -> fmt::Result {
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epoch::Tm::from_epoch(self.0 as i64).unwrap().format_YYYYMMDDHHmmSS(&mut*f.format_field()?)
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// write!(f, "{}", self.0)
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}
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}
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pub const TIME48_MAX: u64 = 0xffff_ffff_ffff;
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/// 48-bit timestamp in seconds since epoch (ignoring leap seconds)
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#[derive(Clone, PartialEq, Eq, Debug)]
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pub struct Time48(pub u64);
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impl DnsPacketData for Time48 {
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fn deserialize(data: &mut Cursor<Bytes>) -> Result<Self> {
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let high16 = u16::deserialize(data)? as u64;
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let low32 = u32::deserialize(data)? as u64;
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Ok(Time48(high16 | low32))
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}
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fn serialize(&self, context: &mut DnsPacketWriteContext, packet: &mut Vec<u8>) -> Result<()> {
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ensure!(self.0 <= TIME48_MAX, "time48 overflow");
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let high16 = (self.0 >> 32) as u16;
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let low32 = self.0 as u32;
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high16.serialize(context, packet)?;
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low32.serialize(context, packet)?;
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Ok(())
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}
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}
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impl DnsTextData for Time48 {
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fn dns_parse(_context: &DnsTextContext, data: &mut &str) -> ::errors::Result<Self> {
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let field = next_field(data)?;
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let epoch = field.parse::<u64>()?;
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ensure!(epoch <= TIME48_MAX, "time48 overflow");
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Ok(Time48(epoch))
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}
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fn dns_format(&self, f: &mut DnsTextFormatter) -> fmt::Result {
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write!(f, "{}", self.0)
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}
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}
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