Log "Set" Actions in Tun (Linux)

I've used the log library and its info method.

I've also added but not used env-logger.

tun/Cargo.toml

@@ -10,13 +10,17 @@ nix = { version = "0.26", features = ["ioctl"] }
 socket2 = "0.4"
 tokio = { version = "1.28", features = [] }
 byteorder = "1.4"
+log = "0.4"
 
 [target.'cfg(windows)'.dependencies]
 lazy_static = "1.4"
 libloading = "0.7"
 tempfile = "3.5"
 widestring = "1.0"
-windows = { version = "0.48", features = ["Win32_Foundation", "Win32_NetworkManagement_IpHelper"] }
+windows = { version = "0.48", features = [
+    "Win32_Foundation",
+    "Win32_NetworkManagement_IpHelper",
+] }
 
 [target.'cfg(windows)'.build-dependencies]
 anyhow = "1.0"

tun/src/unix/linux/mod.rs

@@ -4,10 +4,12 @@ use socket2::{Domain, SockAddr, Socket, Type};
 use std::fs::OpenOptions;
 use std::io::{Error, Write};
 use std::mem;
-use std::net::{Ipv4Addr, Ipv6Addr, SocketAddrV4, SocketAddrV6};
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddrV4};
 use std::os::fd::RawFd;
 use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd};
 
+use log::info;
+
 use libc::in6_ifreq;
 
 use super::{ifname_to_string, string_to_ifname};
@@ -73,23 +75,7 @@ impl TunInterface {
         let mut iff = self.ifreq()?;
         iff.ifr_ifru.ifru_addr = unsafe { *addr.as_ptr() };
         self.perform(|fd| unsafe { sys::if_set_addr(fd, &iff) })?;
-    }
-
-    #[throws]
-    pub fn set_mtu(&self, mtu: i32) {
-        let mut iff = self.ifreq()?;
-        iff.ifr_ifru.ifru_mtu = mtu;
-        self.perform(|fd| unsafe { sys::if_set_mtu(fd, &iff) })?;
-    }
-
-    #[throws]
-    pub fn set_netmask(&self, addr: Ipv4Addr) {
-        let addr = SockAddr::from(SocketAddrV4::new(addr, 0));
-
-        let mut iff = self.ifreq()?;
-        iff.ifr_ifru.ifru_netmask = unsafe { *addr.as_ptr() };
-
-        self.perform(|fd| unsafe { sys::if_set_netmask(fd, &iff) })?;
+        info!("ipv4_addr_set: {:?} (fd: {:?})", addr, self.as_raw_fd())
     }
 
     #[throws]
@@ -105,6 +91,15 @@ impl TunInterface {
         let mut iff = self.in6_ifreq()?;
         iff.ifr6_addr.s6_addr = addr.octets();
         self.perform6(|fd| unsafe { sys::if_set_addr6(fd, &iff) })?;
+        info!("ipv6_addr_set: {:?} (fd: {:?})", addr, self.as_raw_fd())
+    }
+
+    #[throws]
+    pub fn set_mtu(&self, mtu: i32) {
+        let mut iff = self.ifreq()?;
+        iff.ifr_ifru.ifru_mtu = mtu;
+        self.perform(|fd| unsafe { sys::if_set_mtu(fd, &iff) })?;
+        info!("mtu_set: {:?} (fd: {:?})", mtu, self.as_raw_fd())
     }
 
     #[throws]
@@ -116,6 +111,22 @@ impl TunInterface {
         mtu
     }
 
+    #[throws]
+    pub fn set_netmask(&self, addr: Ipv4Addr) {
+        let addr = SockAddr::from(SocketAddrV4::new(addr, 0));
+
+        let mut iff = self.ifreq()?;
+        iff.ifr_ifru.ifru_netmask = unsafe { *addr.as_ptr() };
+
+        self.perform(|fd| unsafe { sys::if_set_netmask(fd, &iff) })?;
+
+        info!(
+            "netmask_set: {:?} (fd: {:?})",
+            unsafe { iff.ifr_ifru.ifru_netmask },
+            self.as_raw_fd()
+        )
+    }
+
     #[throws]
     pub fn netmask(&self) -> Ipv4Addr {
         let mut iff = self.ifreq()?;