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.

Cargo.lock

@@ -20,6 +20,15 @@ dependencies = [
  "opaque-debug",
 ]
 
+[[package]]
+name = "aho-corasick"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43f6cb1bf222025340178f382c426f13757b2960e89779dfcb319c32542a5a41"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "anstream"
 version = "0.3.2"
@@ -143,6 +152,8 @@ version = "0.1.0"
 dependencies = [
  "caps",
  "clap",
+ "env_logger",
+ "log",
  "nix",
  "tokio",
  "tun",
@@ -368,6 +379,19 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85cdab6a89accf66733ad5a1693a4dcced6aeff64602b634530dd73c1f3ee9f0"
+dependencies = [
+ "humantime",
+ "is-terminal",
+ "log",
+ "regex",
+ "termcolor",
+]
+
 [[package]]
 name = "errno"
 version = "0.3.1"
@@ -599,6 +623,12 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
 
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
 [[package]]
 name = "hyper"
 version = "0.14.26"
@@ -754,12 +784,9 @@ checksum = "ece97ea872ece730aed82664c424eb4c8291e1ff2480247ccf7409044bc6479f"
 
 [[package]]
 name = "log"
-version = "0.4.17"
+version = "0.4.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+checksum = "b06a4cde4c0f271a446782e3eff8de789548ce57dbc8eca9292c27f4a42004b4"
-dependencies = [
- "cfg-if",
-]
 
 [[package]]
 name = "memchr"
@@ -1032,6 +1059,8 @@ version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "af83e617f331cc6ae2da5443c602dfa5af81e517212d9d611a5b3ba1777b5370"
 dependencies = [
+ "aho-corasick",
+ "memchr",
  "regex-syntax",
 ]
 
@@ -1292,6 +1321,15 @@ dependencies = [
  "windows-sys 0.45.0",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be55cf8942feac5c765c2c993422806843c9a9a45d4d5c407ad6dd2ea95eb9b6"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.40"
@@ -1437,6 +1475,7 @@ dependencies = [
  "lazy_static",
  "libc",
  "libloading",
+ "log",
  "nix",
  "reqwest",
  "socket2",
@@ -1642,6 +1681,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"

Cargo.toml

@@ -1,6 +1,2 @@
 [workspace]
-members = [
+members = ["burrow", "tun-async", "tun"]
-    "burrow",
-    "tun-async",
-    "tun"
-]

burrow/Cargo.toml

@@ -10,6 +10,8 @@ crate-type = ["lib", "staticlib"]
 tokio = { version = "1.21", features = ["rt", "macros"] }
 tun = { version = "0.1", path = "../tun" }
 clap = { version = "4.3.2", features = ["derive"] }
+env_logger = "0.10"
+log = "0.4"
 
 [target.'cfg(target_os = "linux")'.dependencies]
 caps = "0.5.5"

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) })?;
-    }
+        info!("ipv4_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) })?;
-    }
-
-    #[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) })?;
     }
 
     #[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()?;