fix(android): send Cidr format instead of IpNetwork format

rust/connlib/clients/android/src/lib.rs

@@ -4,9 +4,9 @@
 // ecosystem, so it's used here for consistency.
 
 use connlib_client_shared::{
-    file_logger, keypair, Callbacks, Error, LoginUrl, LoginUrlError, ResourceDescription, Session,
+    file_logger, keypair, Callbacks, Cidrv4, Cidrv6, Error, LoginUrl, LoginUrlError,
+    ResourceDescription, Session,
 };
-use ip_network::{Ipv4Network, Ipv6Network};
 use jni::{
     objects::{GlobalRef, JByteArray, JClass, JObject, JObjectArray, JString, JValue, JValueGen},
     strings::JNIString,
@@ -196,8 +196,8 @@ impl Callbacks for CallbackHandler {
 
     fn on_update_routes(
         &self,
-        route_list_4: Vec<Ipv4Network>,
-        route_list_6: Vec<Ipv6Network>,
+        route_list_4: Vec<Cidrv4>,
+        route_list_6: Vec<Cidrv6>,
     ) -> Result<Option<RawFd>, Self::Error> {
         self.env(|mut env| {
             let route_list_4 = env

rust/connlib/clients/apple/src/lib.rs

@@ -2,9 +2,8 @@
 #![allow(clippy::unnecessary_cast, improper_ctypes, non_camel_case_types)]
 
 use connlib_client_shared::{
-    file_logger, keypair, Callbacks, Error, LoginUrl, ResourceDescription, Session,
+    file_logger, keypair, Callbacks, Cidrv4, Cidrv6, Error, LoginUrl, ResourceDescription, Session,
 };
-use ip_network::{Ipv4Network, Ipv6Network};
 use secrecy::SecretString;
 use std::{
     net::{IpAddr, Ipv4Addr, Ipv6Addr},
@@ -122,8 +121,8 @@ impl Callbacks for CallbackHandler {
 
     fn on_update_routes(
         &self,
-        route_list_4: Vec<Ipv4Network>,
-        route_list_6: Vec<Ipv6Network>,
+        route_list_4: Vec<Cidrv4>,
+        route_list_6: Vec<Cidrv6>,
     ) -> Result<Option<RawFd>, Self::Error> {
         self.inner.on_update_routes(
             serde_json::to_string(&route_list_4).unwrap(),

rust/connlib/clients/shared/src/lib.rs

@@ -1,6 +1,8 @@
 //! Main connlib library for clients.
 pub use connlib_shared::messages::ResourceDescription;
-pub use connlib_shared::{keypair, Callbacks, Error, LoginUrl, LoginUrlError, StaticSecret};
+pub use connlib_shared::{
+    keypair, Callbacks, Cidrv4, Cidrv6, Error, LoginUrl, LoginUrlError, StaticSecret,
+};
 pub use tracing_appender::non_blocking::WorkerGuard;
 
 use backoff::ExponentialBackoffBuilder;

rust/connlib/shared/src/callbacks.rs

@@ -1,5 +1,6 @@
 use crate::messages::ResourceDescription;
 use ip_network::{Ipv4Network, Ipv6Network};
+use serde::Serialize;
 use std::error::Error;
 use std::fmt::{Debug, Display};
 use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
@@ -8,6 +9,36 @@ use std::path::PathBuf;
 // Avoids having to map types for Windows
 type RawFd = i32;
 
+#[derive(Serialize, Clone, Copy, Debug)]
+pub struct Cidrv4 {
+    address: Ipv4Addr,
+    prefix: u8,
+}
+
+#[derive(Serialize, Clone, Copy, Debug)]
+pub struct Cidrv6 {
+    address: Ipv6Addr,
+    prefix: u8,
+}
+
+impl From<Ipv4Network> for Cidrv4 {
+    fn from(value: Ipv4Network) -> Self {
+        Self {
+            address: value.network_address(),
+            prefix: value.netmask(),
+        }
+    }
+}
+
+impl From<Ipv6Network> for Cidrv6 {
+    fn from(value: Ipv6Network) -> Self {
+        Self {
+            address: value.network_address(),
+            prefix: value.netmask(),
+        }
+    }
+}
+
 /// Traits that will be used by connlib to callback the client upper layers.
 pub trait Callbacks: Clone + Send + Sync {
     /// Error returned when a callback fails.
@@ -35,8 +66,8 @@ pub trait Callbacks: Clone + Send + Sync {
     /// Called when the route list changes.
     fn on_update_routes(
         &self,
-        _: Vec<Ipv4Network>,
-        _: Vec<Ipv6Network>,
+        _: Vec<Cidrv4>,
+        _: Vec<Cidrv6>,
     ) -> Result<Option<RawFd>, Self::Error> {
         Ok(None)
     }

rust/connlib/shared/src/callbacks_error_facade.rs

@@ -1,5 +1,4 @@
-use ip_network::{Ipv4Network, Ipv6Network};
-
+use crate::callbacks::{Cidrv4, Cidrv6};
 use crate::messages::ResourceDescription;
 use crate::{Callbacks, Error, Result};
 use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
@@ -43,8 +42,8 @@ impl<CB: Callbacks> Callbacks for CallbackErrorFacade<CB> {
 
     fn on_update_routes(
         &self,
-        routes4: Vec<Ipv4Network>,
-        routes6: Vec<Ipv6Network>,
+        routes4: Vec<Cidrv4>,
+        routes6: Vec<Cidrv6>,
     ) -> Result<Option<RawFd>> {
         let result = self
             .0

rust/connlib/shared/src/lib.rs

@@ -21,7 +21,7 @@ pub mod windows;
 
 pub use boringtun::x25519::PublicKey;
 pub use boringtun::x25519::StaticSecret;
-pub use callbacks::Callbacks;
+pub use callbacks::{Callbacks, Cidrv4, Cidrv6};
 pub use callbacks_error_facade::CallbackErrorFacade;
 pub use error::ConnlibError as Error;
 pub use error::Result;

rust/connlib/tunnel/src/device_channel.rs

@@ -19,10 +19,9 @@ mod tun;
 mod tun;
 
 use crate::ip_packet::{IpPacket, MutableIpPacket};
-use connlib_shared::error::ConnlibError;
-use connlib_shared::messages::Interface;
-use connlib_shared::{Callbacks, Error};
-use ip_network::{IpNetwork, Ipv4Network, Ipv6Network};
+use connlib_shared::{error::ConnlibError, messages::Interface, Callbacks, Error};
+use connlib_shared::{Cidrv4, Cidrv6};
+use ip_network::IpNetwork;
 use pnet_packet::Packet;
 use std::collections::HashSet;
 use std::io;
@@ -39,18 +38,18 @@ pub struct Device {
 }
 
 #[allow(dead_code)]
-fn ipv4(ip: &IpNetwork) -> Option<&Ipv4Network> {
+fn ipv4(ip: IpNetwork) -> Option<Cidrv4> {
     match ip {
-        IpNetwork::V4(v4) => Some(v4),
+        IpNetwork::V4(v4) => Some(v4.into()),
         IpNetwork::V6(_) => None,
     }
 }
 
 #[allow(dead_code)]
-fn ipv6(ip: &IpNetwork) -> Option<&Ipv6Network> {
+fn ipv6(ip: IpNetwork) -> Option<Cidrv6> {
     match ip {
         IpNetwork::V4(_) => None,
-        IpNetwork::V6(v6) => Some(v6),
+        IpNetwork::V6(v6) => Some(v6.into()),
     }
 }
 

rust/connlib/tunnel/src/device_channel/tun_android.rs

@@ -67,8 +67,8 @@ impl Tun {
     ) -> Result<()> {
         let fd = callbacks
             .on_update_routes(
-                routes.iter().filter_map(ipv4).copied().collect(),
-                routes.iter().filter_map(ipv6).copied().collect(),
+                routes.iter().copied().filter_map(ipv4).collect(),
+                routes.iter().copied().filter_map(ipv6).collect(),
             )?
             .ok_or(Error::NoFd)?;
 

rust/connlib/tunnel/src/device_channel/tun_darwin.rs

@@ -152,8 +152,8 @@ impl Tun {
     ) -> Result<()> {
         // This will always be None in macos
         callbacks.on_update_routes(
-            routes.iter().filter_map(ipv4).copied().collect(),
-            routes.iter().filter_map(ipv6).copied().collect(),
+            routes.iter().copied().filter_map(ipv4).collect(),
+            routes.iter().copied().filter_map(ipv6).collect(),
         )?;
 
         Ok(())

swift/apple/FirezoneNetworkExtension/Adapter.swift

@@ -451,18 +451,15 @@ extension Adapter: CallbackHandlerDelegate {
     workQueue.async { [weak self] in
       guard let self = self else { return }
 
-      self.logger.log("Adapter.onUpdateRoutes")
-
-      let routes4 = try! JSONDecoder().decode([String].self, from: routeList4.data(using: .utf8)!)
-      let routes6 = try! JSONDecoder().decode([String].self, from: routeList6.data(using: .utf8)!)
+      self.logger.log("Adapter.onUpdateRoutes \(routeList4) \(routeList6)")
 
       guard let networkSettings = self.networkSettings else {
         self.logger.error("Adapter.onUpdateRoutes: No network settings")
         return
       }
 
-      networkSettings.routes4 = NetworkSettings.parseRoutes4(routes4: routes4)
-      networkSettings.routes6 = NetworkSettings.parseRoutes6(routes6: routes6)
+      networkSettings.routes4 = try! JSONDecoder().decode([NetworkSettings.Cidr].self, from: routeList4.data(using: .utf8)!).compactMap { $0.asNEIPv4Route }
+      networkSettings.routes6 = try! JSONDecoder().decode([NetworkSettings.Cidr].self, from: routeList6.data(using: .utf8)!).compactMap { $0.asNEIPv6Route }
 
       networkSettings.apply(on: packetTunnelProvider, logger: self.logger, completionHandler: nil)
     }

swift/apple/FirezoneNetworkExtension/NetworkSettings.swift

@@ -154,47 +154,18 @@ enum IPv4SubnetMaskLookup {
   ]
 }
 
-extension NetworkSettings {
-  static func parseRoutes4(routes4: [String]) -> [NEIPv4Route] {
-    return routes4.map { route4 in
-      let components = route4.split(separator: "/")
-      let address = String(components[0])
-      let prefix: Int = Int(components[1])!
-      let mask = IPv4SubnetMaskLookup.table[prefix]!
-      return NEIPv4Route(destinationAddress: address, subnetMask: mask)
-    }
-  }
-
-  static func parseRoutes6(routes6: [String]) -> [NEIPv6Route] {
-    routes6.map { route6 in
-        let components = route6.split(separator: "/")
-        let address = String(components[0])
-        let prefix: NSNumber = NSNumber(value: Int(components.last!)!)
-        return NEIPv6Route(destinationAddress: address, networkPrefixLength: prefix)
-    }
-  }
 
-  private static func validNetworkPrefixLength(fromString string: String, maximumValue: Int) -> Int
-  {
-    guard let networkPrefixLength = Int(string) else { return 0 }
-    if networkPrefixLength < 0 { return 0 }
-    if networkPrefixLength > maximumValue { return maximumValue }
-    return networkPrefixLength
-  }
+extension NetworkSettings {
+  struct Cidr: Codable {
+      let address: String
+      let prefix: Int
 
-  private static func ipv4SubnetMask(networkPrefixLength: Int) -> String {
-    precondition(networkPrefixLength >= 0 && networkPrefixLength <= 32)
-    let mask: UInt32 = 0xFFFF_FFFF
-    let maxPrefixLength = 32
-    let octets = 4
-
-    let subnetMask = mask & (mask << (maxPrefixLength - networkPrefixLength))
-    var parts: [String] = []
-    for idx in 0...(octets - 1) {
-      let part = String(UInt32(0x0000_00FF) & (subnetMask >> ((octets - 1 - idx) * 8)), radix: 10)
-      parts.append(part)
-    }
+      var asNEIPv4Route: NEIPv4Route {
+          return NEIPv4Route(destinationAddress: address, subnetMask: String(prefix))
+      }
 
-    return parts.joined(separator: ".")
+      var asNEIPv6Route: NEIPv6Route {
+          return NEIPv6Route(destinationAddress: address, networkPrefixLength: NSNumber(value: prefix))
+      }
   }
 }