Support build for target_os android

The target_os `android` is quite similar to `linux` but must be
mentioned in the guards explicitly. Tested for target
`aarch64-linux-android`.

CHANGELOG.md

@@ -12,6 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 * Remove unnecessary logging synchronisation #381 - @cyqsimon
 * Apply suggestions from new clippy lint clippy::assigning_clones #382 - @cyqsimon
 * Fix IPv6 socket detect logic #383 - @cyqsimon
+* Support build for `target_os`` `android` #384 - @flxo
 
 ## Added
 * CI: include generated assets in release archive #359 - @cyqsimon

Cargo.toml

@@ -43,7 +43,7 @@ trust-dns-resolver = "0.23.2"
 unicode-width = "0.1.11"
 strum = { version = "0.26.2", features = ["derive"] }
 
-[target.'cfg(target_os = "linux")'.dependencies]
+[target.'cfg(any(target_os = "android", target_os = "linux"))'.dependencies]
 procfs = "0.16.0"
 
 [target.'cfg(any(target_os = "macos", target_os = "freebsd"))'.dependencies]

src/os/mod.rs

@@ -1,4 +1,4 @@
-#[cfg(target_os = "linux")]
+#[cfg(any(target_os = "android", target_os = "linux"))]
 mod linux;
 
 #[cfg(any(target_os = "macos", target_os = "freebsd"))]

src/os/shared.rs

@@ -13,7 +13,7 @@ use tokio::runtime::Runtime;
 
 use crate::{network::dns, os::errors::GetInterfaceError, OsInputOutput};
 
-#[cfg(target_os = "linux")]
+#[cfg(any(target_os = "android", target_os = "linux"))]
 use crate::os::linux::get_open_sockets;
 #[cfg(any(target_os = "macos", target_os = "freebsd"))]
 use crate::os::lsof::get_open_sockets;
@@ -220,7 +220,7 @@ fn eperm_message() -> &'static str {
 }
 
 #[inline]
-#[cfg(target_os = "linux")]
+#[cfg(any(target_os = "android", target_os = "linux"))]
 fn eperm_message() -> &'static str {
     r#"
     Insufficient permissions to listen on network interface(s). You can work around