Remove dependency on byteorder

Cargo.lock

@@ -459,7 +459,6 @@ name = "redox_netstack"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "byteorder 1.5.0",
  "dns-parser",
  "ioslice",
  "libredox",

Cargo.toml

@@ -21,7 +21,6 @@ redox_event = "0.4.1"
 redox-daemon = "0.1.2"
 redox_syscall = "0.5"
 redox-log = "0.1"
-byteorder = { version = "1.0", default-features = false }
 dns-parser = "0.7.1"
 libredox = { version = "0.1.3", features = ["mkns"] }
 anyhow = "1.0.81"

src/smolnetd/scheme/icmp.rs

@@ -1,4 +1,3 @@
-use byteorder::{ByteOrder, NetworkEndian};
 use smoltcp::iface::SocketHandle;
 use smoltcp::socket::icmp::{
     Endpoint as IcmpEndpoint, PacketBuffer as IcmpSocketBuffer,
@@ -178,8 +177,8 @@ impl<'a> SchemeSocket for IcmpSocket<'a> {
                     if buf.len() < mem::size_of::<u16>() {
                         return Err(SyscallError::new(syscall::EINVAL));
                     }
-                    let (seq_buf, payload) = buf.split_at(mem::size_of::<u16>());
-                    let seq_no = NetworkEndian::read_u16(seq_buf);
+                    let (&seq_buf, payload) = buf.split_first_chunk::<2>().unwrap();
+                    let seq_no = u16::from_be_bytes(seq_buf);
                     let icmp_repr = Icmpv4Repr::EchoRequest {
                         ident: file.data.ident,
                         seq_no,
@@ -218,7 +217,7 @@ impl<'a> SchemeSocket for IcmpSocket<'a> {
                 if buf.len() < mem::size_of::<u16>() + data.len() {
                     return Err(SyscallError::new(syscall::EINVAL));
                 }
-                NetworkEndian::write_u16(&mut buf[0..2], seq_no);
+                buf[0..2].copy_from_slice(&seq_no.to_be_bytes());
 
                 for i in 0..data.len() {
                     buf[mem::size_of::<u16>() + i] = data[i];