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Macros for ICMP and ICMPv6 payloads #51

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Macros for ICMP and ICMPv6 payloads #51

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56 changes: 56 additions & 0 deletions nftnl/src/expr/payload.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -185,6 +185,7 @@ impl HeaderField for Ipv6HeaderField {
pub enum TransportHeaderField {
Tcp(TcpHeaderField),
Udp(UdpHeaderField),
Icmp(IcmpHeaderField),
Icmpv6(Icmpv6HeaderField),
}

Expand All @@ -194,6 +195,7 @@ impl HeaderField for TransportHeaderField {
match *self {
Tcp(ref f) => f.offset(),
Udp(ref f) => f.offset(),
Icmp(ref f) => f.offset(),
Icmpv6(ref f) => f.offset(),
}
}
Expand All @@ -203,6 +205,7 @@ impl HeaderField for TransportHeaderField {
match *self {
Tcp(ref f) => f.len(),
Udp(ref f) => f.len(),
Icmp(ref f) => f.len(),
Icmpv6(ref f) => f.len(),
}
}
Expand Down Expand Up @@ -261,6 +264,34 @@ impl HeaderField for UdpHeaderField {
}
}

#[derive(Copy, Clone, Eq, PartialEq)]
#[non_exhaustive]
pub enum IcmpHeaderField {
Type,
Code,
Checksum,
}

impl HeaderField for IcmpHeaderField {
fn offset(&self) -> u32 {
use self::IcmpHeaderField::*;
match *self {
Type => 0,
Code => 1,
Checksum => 2,
}
}

fn len(&self) -> u32 {
use self::IcmpHeaderField::*;
match *self {
Type => 1,
Code => 1,
Checksum => 2,
}
}
}

#[derive(Copy, Clone, Eq, PartialEq)]
#[non_exhaustive]
pub enum Icmpv6HeaderField {
Expand Down Expand Up @@ -334,6 +365,20 @@ macro_rules! nft_expr_payload {
$crate::expr::UdpHeaderField::Len
};

(@icmp_field icmptype) => {
$crate::expr::IcmpHeaderField::Type
};
(@icmp_field code) => {
$crate::expr::IcmpHeaderField::Code
};

(@icmpv6_field icmptype) => {
$crate::expr::Icmpv6HeaderField::Type
};
(@icmpv6_field code) => {
$crate::expr::Icmpv6HeaderField::Code
};

(ethernet daddr) => {
$crate::expr::Payload::LinkLayer($crate::expr::LLHeaderField::Daddr)
};
Expand Down Expand Up @@ -365,4 +410,15 @@ macro_rules! nft_expr_payload {
nft_expr_payload!(@udp_field $field),
))
};

(icmp $field:ident) => {
$crate::expr::Payload::Transport($crate::expr::TransportHeaderField::Icmp(
nft_expr_payload!(@icmp_field $field),
))
};
(icmpv6 $field:ident) => {
$crate::expr::Payload::Transport($crate::expr::TransportHeaderField::Icmpv6(
nft_expr_payload!(@icmpv6_field $field),
))
};
}