diff options
Diffstat (limited to 'src/sniffing')
| -rw-r--r-- | src/sniffing/headers.rs | 50 |
1 files changed, 36 insertions, 14 deletions
diff --git a/src/sniffing/headers.rs b/src/sniffing/headers.rs index 0a1a742..c90a849 100644 --- a/src/sniffing/headers.rs +++ b/src/sniffing/headers.rs @@ -4,9 +4,10 @@ use tun::Error; use crate::config::Config; #[derive(Debug)] -enum Protocol { +pub enum Protocol { TCP, - UDP + UDP, + Unsupported(u8) } type Ipv4 = [u8; 4]; type Ipv6 = [u8; 16]; @@ -30,36 +31,57 @@ pub enum PacketInfo { protocol: Protocol } } + +impl PacketInfo { + pub fn protocol(&self) -> &Protocol { + match self { + PacketInfo::V4 { protocol, .. } => protocol, + PacketInfo::V6 { protocol, .. } => protocol, + } + } +} pub fn sniff_raw_packets(packet: &[u8]) -> Result<PacketInfo, Box<dyn std::error::Error + Send + Sync + 'static>> { - println!("something"); let ver = packet[0] >> 4; dbg!(ver); match ver { 4 => { - Ok(PacketInfo::V4{ - src_ip: packet[12..16].try_into()?, + let v4 = PacketInfo::V4{ + src_ip: <[u8; 4]>::try_from(&packet[12..16])?, src_port: u16::from_be_bytes([packet[20], packet[21]]), - dst_ip: packet[16..20].try_into()?, + dst_ip: <[u8; 4]>::try_from(&packet[16..20])?, dst_port: u16::from_be_bytes([packet[22], packet[23]]), protocol: match packet[9] { 6 => Protocol::TCP, - 4 => Protocol::UDP, - p => return Err(format!("unsuppiorted protocol: {p}").into()) + 17 => Protocol::UDP, + p => Protocol::Unsupported(p) } - }) + }; + if !matches!(v4.protocol(), Protocol::Unsupported(_)) { + println!("{v4:?}"); + } else { + println!("oppsie unsupported"); + } + Ok(v4) }, 6 => { - Ok(PacketInfo::V6{ - src_ip: packet[8..24].try_into()?, + println!("im in 6!"); + let v6 = PacketInfo::V6{ + src_ip: <[u8; 16]>::try_from(&packet[8..24])?, src_port: u16::from_be_bytes([packet[40], packet[41]]), - dst_ip: packet[24..40].try_into()?, + dst_ip: <[u8; 16]>::try_from(&packet[24..40])?, dst_port: u16::from_be_bytes([packet[42], packet[43]]), protocol: match packet[6] { 6 => Protocol::TCP, 4 => Protocol::UDP, - p => return Err(format!("unsuppiorted protocol: {p}").into()) + p => Protocol::Unsupported(p) } - }) + }; + if !matches!(v6.protocol(), Protocol::Unsupported(_)) { + println!("{v6:?}"); + } else { + println!("oppsie unsupported"); + } + Ok(v6) }, ver => { Err(format!("unsuppiorted ver: {ver}").into()) |
