finialize initial dns + caching

1 files changed, 0 insertions, 192 deletions

diff --git a/packet/src/buffer.rs b/packet/src/buffer.rs
deleted file mode 100644
index 4394705..0000000
--- a/packet/src/buffer.rs
+++ /dev/null
@@ -1,192 +0,0 @@
-use super::Result;
-
-pub struct PacketBuffer {
-    pub buf: [u8; 512],
-    pub pos: usize,
-}
-
-impl PacketBuffer {
-    pub fn new() -> Self {
-        Self {
-            buf: [0; 512],
-            pos: 0,
-        }
-    }
-
-    pub fn pos(&self) -> usize {
-        self.pos
-    }
-
-    pub fn step(&mut self, steps: usize) -> Result<()> {
-        self.pos += steps;
-
-        Ok(())
-    }
-
-    pub fn seek(&mut self, pos: usize) -> Result<()> {
-        self.pos = pos;
-
-        Ok(())
-    }
-
-    pub fn read(&mut self) -> Result<u8> {
-        if self.pos >= 512 {
-            return Err("End of buffer".into());
-        }
-        let res = self.buf[self.pos];
-        self.pos += 1;
-
-        Ok(res)
-    }
-
-    pub fn get(&mut self, pos: usize) -> Result<u8> {
-        if pos >= 512 {
-            return Err("End of buffer".into());
-        }
-        Ok(self.buf[pos])
-    }
-
-    pub fn get_range(&mut self, start: usize, len: usize) -> Result<&[u8]> {
-        if start + len >= 512 {
-            return Err("End of buffer".into());
-        }
-        Ok(&self.buf[start..start + len])
-    }
-
-    pub fn read_u16(&mut self) -> Result<u16> {
-        let res = ((self.read()? as u16) << 8) | (self.read()? as u16);
-
-        Ok(res)
-    }
-
-    pub fn read_u32(&mut self) -> Result<u32> {
-        let res = ((self.read()? as u32) << 24)
-            | ((self.read()? as u32) << 16)
-            | ((self.read()? as u32) << 8)
-            | (self.read()? as u32);
-
-        Ok(res)
-    }
-
-    pub fn read_qname(&mut self, outstr: &mut String) -> Result<()> {
-        let mut pos = self.pos();
-        let mut jumped = false;
-
-        let mut delim = "";
-        let max_jumps = 5;
-        let mut jumps_performed = 0;
-        loop {
-            // Dns Packets are untrusted data, so we need to be paranoid. Someone
-            // can craft a packet with a cycle in the jump instructions. This guards
-            // against such packets.
-            if jumps_performed > max_jumps {
-                return Err(format!("Limit of {max_jumps} jumps exceeded").into());
-            }
-
-            let len = self.get(pos)?;
-
-            // A two byte sequence, where the two highest bits of the first byte is
-            // set, represents a offset relative to the start of the buffer. We
-            // handle this by jumping to the offset, setting a flag to indicate
-            // that we shouldn't update the shared buffer position once done.
-            if (len & 0xC0) == 0xC0 {
-                // When a jump is performed, we only modify the shared buffer
-                // position once, and avoid making the change later on.
-                if !jumped {
-                    self.seek(pos + 2)?;
-                }
-
-                let b2 = self.get(pos + 1)? as u16;
-                let offset = (((len as u16) ^ 0xC0) << 8) | b2;
-                pos = offset as usize;
-                jumped = true;
-                jumps_performed += 1;
-                continue;
-            }
-
-            pos += 1;
-
-            // Names are terminated by an empty label of length 0
-            if len == 0 {
-                break;
-            }
-
-            outstr.push_str(delim);
-
-            let str_buffer = self.get_range(pos, len as usize)?;
-            outstr.push_str(&String::from_utf8_lossy(str_buffer).to_lowercase());
-
-            delim = ".";
-
-            pos += len as usize;
-        }
-
-        if !jumped {
-            self.seek(pos)?;
-        }
-
-        Ok(())
-    }
-
-    pub fn write(&mut self, val: u8) -> Result<()> {
-        if self.pos >= 512 {
-            return Err("End of buffer".into());
-        }
-        self.buf[self.pos] = val;
-        self.pos += 1;
-        Ok(())
-    }
-
-    pub fn write_u8(&mut self, val: u8) -> Result<()> {
-        self.write(val)?;
-
-        Ok(())
-    }
-
-    pub fn write_u16(&mut self, val: u16) -> Result<()> {
-        self.write((val >> 8) as u8)?;
-        self.write((val & 0xFF) as u8)?;
-
-        Ok(())
-    }
-
-    pub fn write_u32(&mut self, val: u32) -> Result<()> {
-        self.write(((val >> 24) & 0xFF) as u8)?;
-        self.write(((val >> 16) & 0xFF) as u8)?;
-        self.write(((val >> 8) & 0xFF) as u8)?;
-        self.write((val & 0xFF) as u8)?;
-
-        Ok(())
-    }
-
-    pub fn write_qname(&mut self, qname: &str) -> Result<()> {
-        for label in qname.split('.') {
-            let len = label.len();
-            if len > 0x34 {
-                return Err("Single label exceeds 63 characters of length".into());
-            }
-
-            self.write_u8(len as u8)?;
-            for b in label.as_bytes() {
-                self.write_u8(*b)?;
-            }
-        }
-
-        self.write_u8(0)?;
-
-        Ok(())
-    }
-
-    pub fn set(&mut self, pos: usize, val: u8) -> Result<()> {
-        self.buf[pos] = val;
-
-        Ok(())
-    }
-
-    pub fn set_u16(&mut self, pos: usize, val: u16) -> Result<()> {
-        self.set(pos, (val >> 8) as u8)?;
-        self.set(pos + 1, (val & 0xFF) as u8)?;
-
-        Ok(())
-    }
-}
\ No newline at end of file