Update smoltcp

Cargo.toml

@@ -29,7 +29,12 @@ features = ["release_max_level_warn"]
 [dependencies.smoltcp]
 path = "smoltcp"
 default-features = false
-features = ["std", "socket-raw", "proto-ipv4", "socket-udp", "socket-tcp", "socket-icmp"]
+features = [
+    "std",
+    "ethernet",
+    "proto-ipv4",
+    "socket-raw", "socket-icmp", "socket-udp", "socket-tcp"
+]
 #For debugging: "log", "verbose"
 
 [profile.release]

src/smolnetd/device.rs

@@ -45,11 +45,11 @@ pub struct RxToken {
 }
 
 impl smoltcp::phy::RxToken for RxToken {
-    fn consume<R, F>(self, _timestamp: Instant, f: F) -> smoltcp::Result<R>
+    fn consume<R, F>(mut self, _timestamp: Instant, f: F) -> smoltcp::Result<R>
     where
-        F: FnOnce(&[u8]) -> smoltcp::Result<R>,
+        F: FnOnce(&mut [u8]) -> smoltcp::Result<R>,
     {
-        f(&self.buffer)
+        f(&mut self.buffer)
     }
 }