diff --git a/kernel/src/net/net_core.rs b/kernel/src/net/net_core.rs
index d7e9bc8f4..9038e7dec 100644
--- a/kernel/src/net/net_core.rs
+++ b/kernel/src/net/net_core.rs
@@ -7,10 +7,7 @@ use crate::{
     driver::net::{Iface, Operstate},
     libs::rwlock::RwLockReadGuard,
     net::NET_DEVICES,
-    time::{
-        sleep::nanosleep,
-        PosixTimeSpec,
-    },
+    time::{sleep::nanosleep, PosixTimeSpec},
 };
 
 pub fn net_init() -> Result<(), SystemError> {
@@ -21,7 +18,12 @@ fn dhcp_query() -> Result<(), SystemError> {
     let binding = NET_DEVICES.write_irqsave();
 
     // Default iface, misspelled to net_face
-    let net_face = binding.iter().find(|(_, iface)| iface.common().is_default_iface()).unwrap().1.clone();
+    let net_face = binding
+        .iter()
+        .find(|(_, iface)| iface.common().is_default_iface())
+        .unwrap()
+        .1
+        .clone();
 
     drop(binding);
 
diff --git a/kernel/src/net/socket/inet/datagram/inner.rs b/kernel/src/net/socket/inet/datagram/inner.rs
index 50020d97f..cbd49a57e 100644
--- a/kernel/src/net/socket/inet/datagram/inner.rs
+++ b/kernel/src/net/socket/inet/datagram/inner.rs
@@ -33,13 +33,14 @@ impl UnboundUdp {
     }
 
     pub fn bind(self, local_endpoint: smoltcp::wire::IpEndpoint) -> Result<BoundUdp, SystemError> {
-
         let inner = BoundInner::bind(self.socket, &local_endpoint.addr)?;
         let bind_addr = local_endpoint.addr;
         let bind_port = if local_endpoint.port == 0 {
             inner.port_manager().bind_ephemeral_port(InetTypes::Udp)?
         } else {
-            inner.port_manager().bind_port(InetTypes::Udp, local_endpoint.port)?;
+            inner
+                .port_manager()
+                .bind_port(InetTypes::Udp, local_endpoint.port)?;
             local_endpoint.port
         };
 
diff --git a/kernel/src/net/socket/inet/datagram/mod.rs b/kernel/src/net/socket/inet/datagram/mod.rs
index e6d8796e3..dbf6a6304 100644
--- a/kernel/src/net/socket/inet/datagram/mod.rs
+++ b/kernel/src/net/socket/inet/datagram/mod.rs
@@ -90,7 +90,7 @@ impl UdpSocket {
                 let ret = bound.try_recv(buf);
                 poll_ifaces();
                 ret
-            },
+            }
             _ => Err(ENOTCONN),
         }
     }
@@ -199,7 +199,8 @@ impl Socket for UdpSocket {
             if !self.is_bound() {
                 self.bind_emphemeral(remote.addr)?;
             }
-            if let UdpInner::Bound(inner) = self.inner.read().as_ref().expect("UDP Inner disappear") {
+            if let UdpInner::Bound(inner) = self.inner.read().as_ref().expect("UDP Inner disappear")
+            {
                 inner.connect(remote);
                 return Ok(());
             } else {