221 lines
7.2 KiB
Rust
221 lines
7.2 KiB
Rust
|
use byteorder::{ByteOrder, NetworkEndian};
|
||
|
|
||
|
use super::icmpv6::*;
|
||
|
use time::Duration;
|
||
|
use super::Ipv6Address;
|
||
|
|
||
|
/// Getters for the Router Advertisement message header.
|
||
|
/// See [RFC 4861 § 4.2].
|
||
|
///
|
||
|
/// [RFC 4861 § 4.2]: https://tools.ietf.org/html/rfc4861#section-4.2
|
||
|
impl<T: AsRef<[u8]>> Packet<T> {
|
||
|
/// Return the current hop limit field.
|
||
|
#[inline]
|
||
|
pub fn current_hop_limit(&self) -> u8 {
|
||
|
let data = self.buffer.as_ref();
|
||
|
data[field::CUR_HOP_LIMIT]
|
||
|
}
|
||
|
|
||
|
/// Return the Router Advertisement flags.
|
||
|
#[inline]
|
||
|
pub fn router_flags(&self) -> RouterFlags {
|
||
|
let data = self.buffer.as_ref();
|
||
|
RouterFlags::from_bits_truncate(data[field::ROUTER_FLAGS])
|
||
|
}
|
||
|
|
||
|
/// Return the router lifetime field.
|
||
|
#[inline]
|
||
|
pub fn router_lifetime(&self) -> Duration {
|
||
|
let data = self.buffer.as_ref();
|
||
|
Duration::from_secs(NetworkEndian::read_u16(&data[field::ROUTER_LT]) as u64)
|
||
|
}
|
||
|
|
||
|
/// Return the reachable time field.
|
||
|
#[inline]
|
||
|
pub fn reachable_time(&self) -> Duration {
|
||
|
let data = self.buffer.as_ref();
|
||
|
Duration::from_millis(NetworkEndian::read_u32(&data[field::REACHABLE_TM]) as u64)
|
||
|
}
|
||
|
|
||
|
/// Return the retransmit time field.
|
||
|
#[inline]
|
||
|
pub fn retrans_time(&self) -> Duration {
|
||
|
let data = self.buffer.as_ref();
|
||
|
Duration::from_millis(NetworkEndian::read_u32(&data[field::RETRANS_TM]) as u64)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/// Getters for the [Neighbor Solicitation], [Neighbor Advertisement], and
|
||
|
/// [Redirect] message types.
|
||
|
///
|
||
|
/// [Neighbor Solicitation]: https://tools.ietf.org/html/rfc4861#section-4.3
|
||
|
/// [Neighbor Advertisement]: https://tools.ietf.org/html/rfc4861#section-4.4
|
||
|
/// [Redirect]: https://tools.ietf.org/html/rfc4861#section-4.5
|
||
|
impl<T: AsRef<[u8]>> Packet<T> {
|
||
|
/// Return the target address field.
|
||
|
#[inline]
|
||
|
pub fn target_addr(&self) -> Ipv6Address {
|
||
|
let data = self.buffer.as_ref();
|
||
|
Ipv6Address::from_bytes(&data[field::TARGET_ADDR])
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
/// Getters for the Neighbor Solicitation message header.
|
||
|
/// See [RFC 4861 § 4.3].
|
||
|
///
|
||
|
/// [RFC 4861 § 4.3]: https://tools.ietf.org/html/rfc4861#section-4.3
|
||
|
impl<T: AsRef<[u8]>> Packet<T> {
|
||
|
/// Return the Neighbor Solicitation flags.
|
||
|
#[inline]
|
||
|
pub fn neighbor_flags(&self) -> NeighborFlags {
|
||
|
let data = self.buffer.as_ref();
|
||
|
NeighborFlags::from_bits_truncate(data[field::NEIGH_FLAGS])
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/// Getters for the Redirect message header.
|
||
|
/// See [RFC 4861 § 4.5].
|
||
|
///
|
||
|
/// [RFC 4861 § 4.5]: https://tools.ietf.org/html/rfc4861#section-4.5
|
||
|
impl<T: AsRef<[u8]>> Packet<T> {
|
||
|
/// Return the destination address field.
|
||
|
#[inline]
|
||
|
pub fn dest_addr(&self) -> Ipv6Address {
|
||
|
let data = self.buffer.as_ref();
|
||
|
Ipv6Address::from_bytes(&data[field::DEST_ADDR])
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/// Setters for the Router Solicitation message header.
|
||
|
/// See [RFC 4861 § 4.1].
|
||
|
///
|
||
|
/// [RFC 4861 § 4.1]: https://tools.ietf.org/html/rfc4861#section-4.1
|
||
|
impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
|
||
|
/// Clear the reserved field.
|
||
|
#[inline]
|
||
|
pub fn clear_reserved(&mut self) {
|
||
|
let data = self.buffer.as_mut();
|
||
|
NetworkEndian::write_u32(&mut data[field::UNUSED], 0);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/// Setters for the Router Advertisement message header.
|
||
|
/// See [RFC 4861 § 4.2].
|
||
|
///
|
||
|
/// [RFC 4861 § 4.2]: https://tools.ietf.org/html/rfc4861#section-4.2
|
||
|
impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
|
||
|
/// Set the current hop limit field.
|
||
|
#[inline]
|
||
|
pub fn set_current_hop_limit(&mut self, value: u8) {
|
||
|
let data = self.buffer.as_mut();
|
||
|
data[field::CUR_HOP_LIMIT] = value;
|
||
|
}
|
||
|
|
||
|
/// Set the Router Advertisement flags.
|
||
|
#[inline]
|
||
|
pub fn set_router_flags(&mut self, flags: RouterFlags) {
|
||
|
self.buffer.as_mut()[field::ROUTER_FLAGS] = flags.bits();
|
||
|
}
|
||
|
|
||
|
/// Set the router lifetime field.
|
||
|
#[inline]
|
||
|
pub fn set_router_lifetime(&mut self, value: Duration) {
|
||
|
let data = self.buffer.as_mut();
|
||
|
NetworkEndian::write_u16(&mut data[field::ROUTER_LT], value.secs() as u16);
|
||
|
}
|
||
|
|
||
|
/// Set the reachable time field.
|
||
|
#[inline]
|
||
|
pub fn set_reachable_time(&mut self, value: Duration) {
|
||
|
let data = self.buffer.as_mut();
|
||
|
NetworkEndian::write_u32(&mut data[field::REACHABLE_TM], value.total_millis() as u32);
|
||
|
}
|
||
|
|
||
|
/// Set the retransmit time field.
|
||
|
#[inline]
|
||
|
pub fn set_retrans_time(&mut self, value: Duration) {
|
||
|
let data = self.buffer.as_mut();
|
||
|
NetworkEndian::write_u32(&mut data[field::RETRANS_TM], value.total_millis() as u32);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/// Setters for the [Neighbor Solicitation], [Neighbor Advertisement], and
|
||
|
/// [Redirect] message types.
|
||
|
///
|
||
|
/// [Neighbor Solicitation]: https://tools.ietf.org/html/rfc4861#section-4.3
|
||
|
/// [Neighbor Advertisement]: https://tools.ietf.org/html/rfc4861#section-4.4
|
||
|
/// [Redirect]: https://tools.ietf.org/html/rfc4861#section-4.5
|
||
|
impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
|
||
|
/// Set the target address field.
|
||
|
#[inline]
|
||
|
pub fn set_target_addr(&mut self, value: Ipv6Address) {
|
||
|
let data = self.buffer.as_mut();
|
||
|
data[field::TARGET_ADDR].copy_from_slice(value.as_bytes());
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/// Setters for the Neighbor Solicitation message header.
|
||
|
/// See [RFC 4861 § 4.3].
|
||
|
///
|
||
|
/// [RFC 4861 § 4.3]: https://tools.ietf.org/html/rfc4861#section-4.3
|
||
|
impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
|
||
|
/// Set the Neighbor Solicitation flags.
|
||
|
#[inline]
|
||
|
pub fn set_neighbor_flags(&mut self, flags: NeighborFlags) {
|
||
|
self.buffer.as_mut()[field::NEIGH_FLAGS] = flags.bits();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/// Setters for the Redirect message header.
|
||
|
/// See [RFC 4861 § 4.5].
|
||
|
///
|
||
|
/// [RFC 4861 § 4.5]: https://tools.ietf.org/html/rfc4861#section-4.5
|
||
|
impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
|
||
|
/// Set the destination address field.
|
||
|
#[inline]
|
||
|
pub fn set_dest_addr(&mut self, value: Ipv6Address) {
|
||
|
let data = self.buffer.as_mut();
|
||
|
data[field::DEST_ADDR].copy_from_slice(value.as_bytes());
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
#[cfg(test)]
|
||
|
mod test {
|
||
|
use super::*;
|
||
|
|
||
|
static ROUTER_ADVERT_BYTES: [u8; 16] =
|
||
|
[0x86, 0x00, 0x2e, 0xf3,
|
||
|
0x40, 0x80, 0x03, 0x84,
|
||
|
0x00, 0x00, 0x03, 0x84,
|
||
|
0x00, 0x00, 0x03, 0x84];
|
||
|
|
||
|
#[test]
|
||
|
fn test_router_advert_deconstruct() {
|
||
|
let packet = Packet::new(&ROUTER_ADVERT_BYTES[..]);
|
||
|
assert_eq!(packet.msg_type(), Message::RouterAdvert);
|
||
|
assert_eq!(packet.msg_code(), 0);
|
||
|
assert_eq!(packet.current_hop_limit(), 64);
|
||
|
assert_eq!(packet.router_flags(), RouterFlags::MANAGED);
|
||
|
assert_eq!(packet.router_lifetime(), Duration::from_secs(900));
|
||
|
assert_eq!(packet.reachable_time(), Duration::from_millis(900));
|
||
|
assert_eq!(packet.retrans_time(), Duration::from_millis(900));
|
||
|
}
|
||
|
|
||
|
#[test]
|
||
|
fn test_router_advert_construct() {
|
||
|
let mut bytes = vec![0x0; 16];
|
||
|
let mut packet = Packet::new(&mut bytes);
|
||
|
packet.set_msg_type(Message::RouterAdvert);
|
||
|
packet.set_msg_code(0);
|
||
|
packet.set_current_hop_limit(64);
|
||
|
packet.set_router_flags(RouterFlags::MANAGED);
|
||
|
packet.set_router_lifetime(Duration::from_secs(900));
|
||
|
packet.set_reachable_time(Duration::from_millis(900));
|
||
|
packet.set_retrans_time(Duration::from_millis(900));
|
||
|
packet.fill_checksum();
|
||
|
assert_eq!(&packet.into_inner()[..], &ROUTER_ADVERT_BYTES[..]);
|
||
|
}
|
||
|
}
|