Fix clippy lints

src/packet.rs

@@ -133,7 +133,7 @@ fn custom_tag<'a>(tag: &'static [u8]) -> impl Fn(&'a [u8]) -> IResult<&'a [u8],
     }
 }
 fn custom_be_u8(input: &[u8]) -> IResult<&[u8], u8> {
-    if input.len() < 1 {
+    if input.is_empty() {
         return Err(CustomErr::InvalidHlen);
     }
 
@@ -184,16 +184,11 @@ fn decode(input: &[u8]) -> IResult<&[u8], Packet> {
     let mut options = Vec::new();
     let mut rest = input;
 
-    loop {
-        match decode_option(rest) {
-            Ok((new_rest, option)) => {
-                rest = new_rest;
-                options.push(option);
-                if rest.starts_with(&[END]) {
-                    break;
-                }
-            }
-            Err(_) => break,
+    while let Ok((new_rest, option)) = decode_option(rest) {
+        rest = new_rest;
+        options.push(option);
+        if rest.starts_with(&[END]) {
+            break;
         }
     }
 
@@ -226,12 +221,7 @@ impl Packet {
 
     /// Extracts requested option payload from packet if available
     pub fn option(&self, code: u8) -> Option<&DhcpOption> {
-        for option in &self.options {
-            if option.code() == code {
-                return Some(&option);
-            }
-        }
-        None
+        self.options.iter().find(|&option| option.code() == code)
     }
 
     /// Convenience function for extracting a packet's message type.

src/server.rs

@@ -1,3 +1,5 @@
+//! This is a convenience module that simplifies the writing of a DHCP server service.
+
 use std::cell::Cell;
 use std::net::{IpAddr, Ipv4Addr, SocketAddr, UdpSocket};
 
@@ -5,8 +7,6 @@ use crate::options;
 use crate::options::{DhcpOption, MessageType};
 use crate::packet::*;
 
-///! This is a convenience module that simplifies the writing of a DHCP server service.
-
 pub struct Server {
     out_buf: Cell<[u8; 1500]>,
     socket: UdpSocket,
@@ -22,12 +22,12 @@ pub trait Handler {
 pub fn filter_options_by_req(opts: &mut Vec<DhcpOption>, req_params: &[u8]) {
     let mut pos = 0;
     let h = &[
-        options::DHCP_MESSAGE_TYPE as u8,
-        options::SERVER_IDENTIFIER as u8,
-        options::SUBNET_MASK as u8,
-        options::IP_ADDRESS_LEASE_TIME as u8,
-        options::DOMAIN_NAME_SERVER as u8,
-        options::ROUTER as u8,
+        options::DHCP_MESSAGE_TYPE,
+        options::SERVER_IDENTIFIER,
+        options::SUBNET_MASK,
+        options::IP_ADDRESS_LEASE_TIME,
+        options::DOMAIN_NAME_SERVER,
+        options::ROUTER,
     ] as &[u8];
 
     // Process options from req_params
@@ -132,7 +132,7 @@ impl Server {
         if let Some(DhcpOption::ParameterRequestList(prl)) =
             req_packet.option(options::PARAMETER_REQUEST_LIST)
         {
-            filter_options_by_req(&mut opts, &prl);
+            filter_options_by_req(&mut opts, prl);
         }
 
         self.send(Packet {