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Diffstat (limited to '')
| -rw-r--r-- | packet/src/record.rs | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/packet/src/record.rs b/packet/src/record.rs deleted file mode 100644 index c7ff1ac..0000000 --- a/packet/src/record.rs +++ /dev/null @@ -1,227 +0,0 @@ -use std::net::{Ipv4Addr, Ipv6Addr}; - -use super::{query::QueryType, buffer::PacketBuffer, Result}; - -#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)] -#[allow(dead_code)] -pub enum DnsRecord { - UNKNOWN { - domain: String, - qtype: u16, - data_len: u16, - ttl: u32, - }, // 0 - A { - domain: String, - addr: Ipv4Addr, - ttl: u32, - }, // 1 - NS { - domain: String, - host: String, - ttl: u32, - }, // 2 - CNAME { - domain: String, - host: String, - ttl: u32, - }, // 5 - MX { - domain: String, - priority: u16, - host: String, - ttl: u32, - }, // 15 - AAAA { - domain: String, - addr: Ipv6Addr, - ttl: u32, - }, // 28 -} - -impl DnsRecord { - pub fn read(buffer: &mut PacketBuffer) -> Result<Self> { - let mut domain = String::new(); - buffer.read_qname(&mut domain)?; - - let qtype_num = buffer.read_u16()?; - let qtype = QueryType::from_num(qtype_num); - let _ = buffer.read_u16()?; - let ttl = buffer.read_u32()?; - let data_len = buffer.read_u16()?; - - match qtype { - QueryType::A => { - let raw_addr = buffer.read_u32()?; - let addr = Ipv4Addr::new( - ((raw_addr >> 24) & 0xFF) as u8, - ((raw_addr >> 16) & 0xFF) as u8, - ((raw_addr >> 8) & 0xFF) as u8, - (raw_addr & 0xFF) as u8, - ); - - Ok(Self::A { domain, addr, ttl }) - } - QueryType::AAAA => { - let raw_addr1 = buffer.read_u32()?; - let raw_addr2 = buffer.read_u32()?; - let raw_addr3 = buffer.read_u32()?; - let raw_addr4 = buffer.read_u32()?; - let addr = Ipv6Addr::new( - ((raw_addr1 >> 16) & 0xFFFF) as u16, - (raw_addr1 & 0xFFFF) as u16, - ((raw_addr2 >> 16) & 0xFFFF) as u16, - (raw_addr2 & 0xFFFF) as u16, - ((raw_addr3 >> 16) & 0xFFFF) as u16, - (raw_addr3 & 0xFFFF) as u16, - ((raw_addr4 >> 16) & 0xFFFF) as u16, - (raw_addr4 & 0xFFFF) as u16, - ); - - Ok(Self::AAAA { domain, addr, ttl }) - } - QueryType::NS => { - let mut ns = String::new(); - buffer.read_qname(&mut ns)?; - - Ok(Self::NS { - domain, - host: ns, - ttl, - }) - } - QueryType::CNAME => { - let mut cname = String::new(); - buffer.read_qname(&mut cname)?; - - Ok(Self::CNAME { - domain, - host: cname, - ttl, - }) - } - QueryType::MX => { - let priority = buffer.read_u16()?; - let mut mx = String::new(); - buffer.read_qname(&mut mx)?; - - Ok(Self::MX { - domain, - priority, - host: mx, - ttl, - }) - } - QueryType::UNKNOWN(_) => { - buffer.step(data_len as usize)?; - - Ok(Self::UNKNOWN { - domain, - qtype: qtype_num, - data_len, - ttl, - }) - } - } - } - - pub fn write(&self, buffer: &mut PacketBuffer) -> Result<usize> { - let start_pos = buffer.pos(); - - match *self { - Self::A { - ref domain, - ref addr, - ttl, - } => { - buffer.write_qname(domain)?; - buffer.write_u16(QueryType::A.to_num())?; - buffer.write_u16(1)?; - buffer.write_u32(ttl)?; - buffer.write_u16(4)?; - - let octets = addr.octets(); - buffer.write_u8(octets[0])?; - buffer.write_u8(octets[1])?; - buffer.write_u8(octets[2])?; - buffer.write_u8(octets[3])?; - } - Self::NS { - ref domain, - ref host, - ttl, - } => { - buffer.write_qname(domain)?; - buffer.write_u16(QueryType::NS.to_num())?; - buffer.write_u16(1)?; - buffer.write_u32(ttl)?; - - let pos = buffer.pos(); - buffer.write_u16(0)?; - - buffer.write_qname(host)?; - - let size = buffer.pos() - (pos + 2); - buffer.set_u16(pos, size as u16)?; - } - Self::CNAME { - ref domain, - ref host, - ttl, - } => { - buffer.write_qname(domain)?; - buffer.write_u16(QueryType::CNAME.to_num())?; - buffer.write_u16(1)?; - buffer.write_u32(ttl)?; - - let pos = buffer.pos(); - buffer.write_u16(0)?; - - buffer.write_qname(host)?; - - let size = buffer.pos() - (pos + 2); - buffer.set_u16(pos, size as u16)?; - } - Self::MX { - ref domain, - priority, - ref host, - ttl, - } => { - buffer.write_qname(domain)?; - buffer.write_u16(QueryType::MX.to_num())?; - buffer.write_u16(1)?; - buffer.write_u32(ttl)?; - - let pos = buffer.pos(); - buffer.write_u16(0)?; - - buffer.write_u16(priority)?; - buffer.write_qname(host)?; - - let size = buffer.pos() - (pos + 2); - buffer.set_u16(pos, size as u16)?; - } - Self::AAAA { - ref domain, - ref addr, - ttl, - } => { - buffer.write_qname(domain)?; - buffer.write_u16(QueryType::AAAA.to_num())?; - buffer.write_u16(1)?; - buffer.write_u32(ttl)?; - buffer.write_u16(16)?; - - for octet in &addr.segments() { - buffer.write_u16(*octet)?; - } - } - Self::UNKNOWN { .. } => { - println!("Skipping record: {self:?}"); - } - } - - Ok(buffer.pos() - start_pos) - } -}
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