add support for OpenBSD/pf

Author: ge9

crates/shadowsocks-service/Cargo.toml

@@ -206,7 +206,7 @@ bson = { version = "2.10.0", optional = true }
 shadowsocks = { version = "1.20.1", path = "../shadowsocks", default-features = false }
 
 # Just for the ioctl call macro
-[target.'cfg(any(target_os = "macos", target_os = "ios", target_os = "freebsd"))'.dependencies]
+[target.'cfg(any(target_os = "macos", target_os = "ios", target_os = "freebsd", target_os = "openbsd"))'.dependencies]
 nix = { version = "0.29", features = ["ioctl"] }
 
 [target.'cfg(windows)'.dependencies]

crates/shadowsocks-service/src/config.rs

@@ -487,6 +487,7 @@ cfg_if! {
             /// Document: <https://www.freebsd.org/doc/handbook/firewalls-pf.html>
             #[cfg(any(
                 target_os = "freebsd",
+                target_os = "openbsd",
                 target_os = "macos",
                 target_os = "ios"
             ))]
@@ -551,6 +552,30 @@ cfg_if! {
                         const AVAILABLE_TYPES: &[&str] = &[RedirType::PacketFilter.name(), RedirType::IpFirewall.name()];
                         AVAILABLE_TYPES
                     }
+                } else if #[cfg(target_os = "openbsd")] {
+                    /// Default TCP transparent proxy solution on this platform
+                    pub fn tcp_default() -> RedirType {
+                        RedirType::PacketFilter
+                    }
+
+                    /// Available TCP transparent proxy types
+                    #[doc(hidden)]
+                    pub fn tcp_available_types() -> &'static [&'static str] {
+                        const AVAILABLE_TYPES: &[&str] = &[RedirType::PacketFilter.name()];
+                        AVAILABLE_TYPES
+                    }
+
+                    /// Default UDP transparent proxy solution on this platform
+                    pub fn udp_default() -> RedirType {
+                        RedirType::PacketFilter
+                    }
+
+                    /// Available UDP transparent proxy types
+                    #[doc(hidden)]
+                    pub const fn udp_available_types() -> &'static [&'static str] {
+                        const AVAILABLE_TYPES: &[&str] = &[RedirType::PacketFilter.name()];
+                        AVAILABLE_TYPES
+                    }
                 } else if #[cfg(any(target_os = "macos", target_os = "ios"))] {
                     /// Default TCP transparent proxy solution on this platform
                     pub fn tcp_default() -> RedirType {
@@ -621,6 +646,7 @@ cfg_if! {
 
                     #[cfg(any(
                         target_os = "freebsd",
+                        target_os = "openbsd",
                         target_os = "macos",
                         target_os = "ios"
                     ))]
@@ -661,6 +687,7 @@ cfg_if! {
 
                     #[cfg(any(
                         target_os = "freebsd",
+                        target_os = "openbsd",
                         target_os = "macos",
                         target_os = "ios",
                     ))]

crates/shadowsocks-service/src/local/redir/sys/unix/mod.rs

@@ -20,5 +20,10 @@ cfg_if! {
         #[allow(dead_code, non_upper_case_globals, non_snake_case, non_camel_case_types)]
         #[allow(clippy::useless_transmute, clippy::too_many_arguments, clippy::unnecessary_cast)]
         mod pfvar;
+    } else if #[cfg(target_os = "openbsd")] {
+        #[path = "pfvar_bindgen_openbsd.rs"]
+        #[allow(dead_code, non_upper_case_globals, non_snake_case, non_camel_case_types)]
+        #[allow(clippy::useless_transmute, clippy::too_many_arguments, clippy::unnecessary_cast)]
+        mod pfvar;
     }
 }