Fix clippy warnings

src/attribute.rs

@@ -8,11 +8,11 @@ use chrono::{DateTime, Utc, TimeZone};
 pub struct Attribute(pub(crate) Vec<u8>);
 
 impl Attribute {
-    pub fn from_integer32(v: &u32) -> Self {
-        Attribute(u32::to_be_bytes(*v).to_vec())
+    pub fn from_integer32(v: u32) -> Self {
+        Attribute(u32::to_be_bytes(v).to_vec())
     }
 
-    pub fn from_string(v: &String) -> Self {
+    pub fn from_string(v: &str) -> Self {
         Attribute(v.as_bytes().to_vec())
     }
 
@@ -33,7 +33,7 @@ impl Attribute {
             return Err("the length of plain_text has to be within 128, but the given value is longer".to_owned());
         }
 
-        if secret.len() == 0 {
+        if secret.is_empty() {
             return Err("secret hasn't be empty, but the given value is empty".to_owned());
         }
 
@@ -127,7 +127,7 @@ impl Attribute {
             return Err(format!("invalid attribute length {}", self.0.len()));
         }
 
-        if secret.len() == 0 {
+        if secret.is_empty() {
             return Err("secret hasn't be empty, but the given value is empty".to_owned());
         }
 

src/attributes.rs

@@ -81,6 +81,6 @@ impl Attributes {
             encoded = encoded[size..].to_owned();
         }
 
-        return encoded;
+        encoded
     }
 }

src/client.rs

@@ -47,7 +47,7 @@ impl Client {
 
         let request_data = match request_packet.encode() {
             Ok(encoded) => encoded,
-            Err(e) => return Err(FailedRadiusPacketEncoding(e.to_string()))
+            Err(e) => return Err(FailedRadiusPacketEncoding(e))
         };
 
         match conn.send(request_data.as_slice()).await {
@@ -63,7 +63,7 @@ impl Client {
 
         match Packet::parse(&buf[..len].to_vec(), request_packet.get_secret()) {
             Ok(response_packet) => Ok(response_packet),
-            Err(e) => Err(FailedParsingUDPResponse(e.to_string()))
+            Err(e) => Err(FailedParsingUDPResponse(e))
         }
     }
 }

src/packet.rs

@@ -64,9 +64,9 @@ impl Packet {
         })
     }
 
-    pub fn response(&self, code: &Code) -> Self {
+    pub fn response(&self, code: Code) -> Self {
         Packet {
-            code: code.clone(),
+            code,
             identifier: self.identifier,
             authenticator: self.authenticator.clone(),
             secret: self.secret.clone(),
@@ -77,7 +77,7 @@ impl Packet {
     pub fn encode(&self) -> Result<Vec<u8>, String> {
         let bs = match self.marshal_binary() {
             Ok(bs) => bs,
-            Err(e) => return Err(e.to_string()),
+            Err(e) => return Err(e),
         };
 
         match self.code {
@@ -107,7 +107,7 @@ impl Packet {
     pub fn marshal_binary(&self) -> Result<Vec<u8>, String> {
         let attributes_len = match self.attributes.attributes_encoded_len() {
             Ok(attributes_len) => attributes_len,
-            Err(e) => return Err(e.to_string())
+            Err(e) => return Err(e)
         };
 
         let size = 20 + attributes_len;
@@ -116,7 +116,7 @@ impl Packet {
         }
 
         let mut bs: Vec<u8> = Vec::new();
-        bs.push(self.code.clone() as u8);
+        bs.push(self.code as u8);
         bs.push(self.identifier);
         bs.extend(u16::to_be_bytes(size).to_vec());
         bs.extend(self.authenticator.to_vec());
@@ -124,7 +124,7 @@ impl Packet {
     }
 
     pub fn is_authentic_response(response: Vec<u8>, request: Vec<u8>, secret: Vec<u8>) -> bool {
-        if response.len() < 20 || request.len() < 20 || secret.len() == 0 {
+        if response.len() < 20 || request.len() < 20 || secret.is_empty() {
             return false;
         }
 
@@ -137,7 +137,7 @@ impl Packet {
     }
 
     pub fn is_authentic_request(request: &[u8], secret: &[u8]) -> bool {
-        if request.len() < 20 || secret.len() == 0 {
+        if request.len() < 20 || secret.is_empty() {
             return false;
         }
 
@@ -146,7 +146,7 @@ impl Packet {
             Code::AccountingRequest | Code::DisconnectRequest | Code::CoARequest => {
                 md5::compute([
                     &request[..4],
-                    &vec![
+                    &[
                         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                     ],

src/server.rs

@@ -88,7 +88,7 @@ impl Server {
 
     async fn process_request<T: RequestHandler, U: SecretProvider>(
         conn: Arc<UdpSocket>,
-        request_data: &Vec<u8>, // TODO
+        request_data: &[u8],
         local_addr: SocketAddr,
         remote_addr: SocketAddr,
         undergoing_requests_lock: Arc<RwLock<HashSet<RequestKey>>>,
@@ -103,7 +103,7 @@ impl Server {
                 return;
             }
         };
-        if secret.len() == 0 {
+        if secret.is_empty() {
             error!("empty secret returned from secret source; empty secret is prohibited");
             return;
         }