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use crate::*;
/// Laxly parsed payload together with an identifier the type of content & the
/// information if the payload is incomplete.
#[derive(Debug, Clone, Eq, PartialEq, Hash, PartialOrd, Ord)]
pub enum LaxPayloadSlice<'a> {
/// Payload with it's type identified by an ether type number
/// (e.g. after an ethernet II or vlan header).
Ether(EtherPayloadSlice<'a>),
/// Payload with is's type identified by an ip number (e.g.
/// after an IP header or after an)
Ip(LaxIpPayloadSlice<'a>),
/// UDP payload.
Udp { payload: &'a [u8], incomplete: bool },
/// TCP payload.
Tcp {
payload: &'a [u8],
/// True if the payload has been cut off.
incomplete: bool,
},
/// Payload part of an ICMP V4 message. Check [`crate::Icmpv4Type`]
/// for a description what will be part of the payload.
Icmpv4 {
payload: &'a [u8],
/// True if the payload has been cut off.
incomplete: bool,
},
/// Payload part of an ICMP V4 message. Check [`crate::Icmpv6Type`]
/// for a description what will be part of the payload.
Icmpv6 {
payload: &'a [u8],
/// True if the payload has been cut off.
incomplete: bool,
},
}
impl<'a> LaxPayloadSlice<'a> {
pub fn slice(&self) -> &'a [u8] {
match self {
LaxPayloadSlice::Ether(e) => e.payload,
LaxPayloadSlice::Ip(i) => i.payload,
LaxPayloadSlice::Udp {
payload,
incomplete: _,
} => payload,
LaxPayloadSlice::Tcp {
payload,
incomplete: _,
} => payload,
LaxPayloadSlice::Icmpv4 {
payload,
incomplete: _,
} => payload,
LaxPayloadSlice::Icmpv6 {
payload,
incomplete: _,
} => payload,
}
}
}
#[cfg(test)]
mod test {
use super::*;
use alloc::format;
#[test]
fn debug() {
assert_eq!(
format!("Udp {{ payload: {:?}, incomplete: {} }}", &[0u8; 0], false),
format!(
"{:?}",
LaxPayloadSlice::Udp {
payload: &[],
incomplete: false
}
)
);
}
#[test]
fn clone_eq_hash_ord() {
let s = LaxPayloadSlice::Udp {
payload: &[],
incomplete: false,
};
assert_eq!(s.clone(), s);
use std::collections::hash_map::DefaultHasher;
use std::hash::{Hash, Hasher};
let a_hash = {
let mut hasher = DefaultHasher::new();
s.hash(&mut hasher);
hasher.finish()
};
let b_hash = {
let mut hasher = DefaultHasher::new();
s.clone().hash(&mut hasher);
hasher.finish()
};
assert_eq!(a_hash, b_hash);
use std::cmp::Ordering;
assert_eq!(s.clone().cmp(&s), Ordering::Equal);
assert_eq!(s.clone().partial_cmp(&s), Some(Ordering::Equal));
}
#[test]
fn slice() {
let payload = [1, 2, 3, 4];
use LaxPayloadSlice::*;
assert_eq!(
Ether(EtherPayloadSlice {
ether_type: EtherType::IPV4,
payload: &payload
})
.slice(),
&payload
);
assert_eq!(
Ip(LaxIpPayloadSlice {
ip_number: IpNumber::IPV4,
fragmented: false,
len_source: LenSource::Slice,
payload: &payload,
incomplete: true,
})
.slice(),
&payload
);
assert_eq!(
Udp {
payload: &payload,
incomplete: false
}
.slice(),
&payload
);
assert_eq!(
Tcp {
payload: &payload,
incomplete: false
}
.slice(),
&payload
);
assert_eq!(
Icmpv4 {
payload: &payload,
incomplete: false
}
.slice(),
&payload
);
assert_eq!(
Icmpv6 {
payload: &payload,
incomplete: false
}
.slice(),
&payload
);
}
}