impl `AsRef<[u8]>` for packet types

Closes: #158
Approved by: whitequark

src/wire/arp.rs

@@ -242,6 +242,12 @@ impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
     }
 }
 
+impl<T: AsRef<[u8]>> AsRef<[u8]> for Packet<T> {
+    fn as_ref(&self) -> &[u8] {
+        self.buffer.as_ref()
+    }
+}
+
 use super::{EthernetAddress, Ipv4Address};
 
 /// A high-level representation of an Address Resolution Protocol packet.

src/wire/ethernet.rs

@@ -196,6 +196,12 @@ impl<T: AsRef<[u8]> + AsMut<[u8]>> Frame<T> {
     }
 }
 
+impl<T: AsRef<[u8]>> AsRef<[u8]> for Frame<T> {
+    fn as_ref(&self) -> &[u8] {
+        self.buffer.as_ref()
+    }
+}
+
 impl<T: AsRef<[u8]>> fmt::Display for Frame<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "EthernetII src={} dst={} type={}",

src/wire/icmpv4.rs

@@ -358,6 +358,12 @@ impl<'a, T: AsRef<[u8]> + AsMut<[u8]> + ?Sized> Packet<&'a mut T> {
     }
 }
 
+impl<T: AsRef<[u8]>> AsRef<[u8]> for Packet<T> {
+    fn as_ref(&self) -> &[u8] {
+        self.buffer.as_ref()
+    }
+}
+
 /// A high-level representation of an Internet Control Message Protocol version 4 packet header.
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum Repr<'a> {

src/wire/icmpv6.rs

@@ -367,6 +367,12 @@ impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
     }
 }
 
+impl<T: AsRef<[u8]>> AsRef<[u8]> for Packet<T> {
+    fn as_ref(&self) -> &[u8] {
+        self.buffer.as_ref()
+    }
+}
+
 /// A high-level representation of an Internet Control Message Protocol version 6 packet header.
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum Repr<'a> {

src/wire/ipv4.rs

@@ -534,6 +534,12 @@ impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
     }
 }
 
+impl<T: AsRef<[u8]>> AsRef<[u8]> for Packet<T> {
+    fn as_ref(&self) -> &[u8] {
+        self.buffer.as_ref()
+    }
+}
+
 /// A high-level representation of an Internet Protocol version 4 packet header.
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub struct Repr {

src/wire/ipv6.rs

@@ -560,6 +560,12 @@ impl<'a, T: AsRef<[u8]> + ?Sized> fmt::Display for Packet<&'a T> {
     }
 }
 
+impl<T: AsRef<[u8]>> AsRef<[u8]> for Packet<T> {
+    fn as_ref(&self) -> &[u8] {
+        self.buffer.as_ref()
+    }
+}
+
 /// A high-level representation of an Internet Protocol version 6 packet header.
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub struct Repr {

src/wire/tcp.rs

@@ -510,6 +510,12 @@ impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
     }
 }
 
+impl<T: AsRef<[u8]>> AsRef<[u8]> for Packet<T> {
+    fn as_ref(&self) -> &[u8] {
+        self.buffer.as_ref()
+    }
+}
+
 /// A representation of a single TCP option.
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum TcpOption<'a> {

src/wire/udp.rs

@@ -190,6 +190,12 @@ impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
     }
 }
 
+impl<T: AsRef<[u8]>> AsRef<[u8]> for Packet<T> {
+    fn as_ref(&self) -> &[u8] {
+        self.buffer.as_ref()
+    }
+}
+
 /// A high-level representation of an User Datagram Protocol packet.
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub struct Repr<'a> {