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add dns field and check

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zedddie 2026-03-16 23:50:51 +01:00 • committed by tuturuu
parent e8c1fbd7d4
commit 81e1ed42a0
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GPG key ID: B352C3C2894405A7
1 changed files with 16 additions and 6 deletions
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22
src/sniffing/headers.rs
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@ -20,7 +20,8 @@ pub enum PacketInfo {
src_port: Port,
dst_ip: Ipv4,
dst_port: Port,
protocol: Protocol
protocol: Protocol,
dns: bool
},
// <https://www.geeksforgeeks.org/computer-networks/internet-protocol-version-6-ipv6-header/>
V6 {
@ -28,7 +29,8 @@ pub enum PacketInfo {
src_port: Port,
dst_ip: Ipv6,
dst_port: Port,
protocol: Protocol
protocol: Protocol,
dns: bool
}
}
@ -49,17 +51,21 @@ pub fn sniff_raw_packets(packet: &[u8]) -> SniffedPacket {
dbg!(ver);
match ver {
4 => {
let dst_port = Port::from_be_bytes([packet[22], packet[23]]);
let dns;
if dst_port == 53 { dns = true; } else { dns = false; };
// FIXME: hardcoded IPv4 port offset
let v4 = PacketInfo::V4{
src_ip: <Ipv4>::try_from(&packet[12..16])?,
src_port: Port::from_be_bytes([packet[20], packet[21]]),
dst_ip: <Ipv4>::try_from(&packet[16..20])?,
dst_port: Port::from_be_bytes([packet[22], packet[23]]),
dst_port,
protocol: match packet[9] {
6 => Protocol::TCP,
17 => Protocol::UDP,
p => Protocol::Unsupported(p)
}
},
dns
};
if !matches!(v4.protocol(), Protocol::Unsupported(_)) {
println!("{v4:?}");
@ -70,16 +76,20 @@ pub fn sniff_raw_packets(packet: &[u8]) -> SniffedPacket {
},
6 => {
println!("im in 6!");
let dst_port = Port::from_be_bytes([packet[22], packet[23]]);
let dns;
if dst_port == 53 { dns = true; } else { dns = false; };
let v6 = PacketInfo::V6{
src_ip: <Ipv6>::try_from(&packet[8..24])?,
src_port: Port::from_be_bytes([packet[40], packet[41]]),
dst_ip: <Ipv6>::try_from(&packet[24..40])?,
dst_port: Port::from_be_bytes([packet[42], packet[43]]),
dst_port,
protocol: match packet[6] {
6 => Protocol::TCP,
17 => Protocol::UDP,
p => Protocol::Unsupported(p)
}
},
dns
};
if !matches!(v6.protocol(), Protocol::Unsupported(_)) {
println!("{v6:?}");