Log if Same IP is used when starting a tunnel

2 files changed, 18 insertions, 1 deletions

diff --git a/ios/PacketTunnel/PacketTunnelProvider.swift b/ios/PacketTunnel/PacketTunnelProvider.swift
index e132952ee3..910c8b2bef 100644
--- a/ios/PacketTunnel/PacketTunnelProvider.swift
+++ b/ios/PacketTunnel/PacketTunnelProvider.swift
@@ -208,6 +208,7 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
             let selectorResult = tunnelConfiguration.selectorResult
             self.selectorResult = selectorResult
             self.providerLogger.debug("Set tunnel relay to \(selectorResult.relay.hostname).")
+            self.logIfDeviceHasSameIP(than: tunnelConfiguration.wgTunnelConfig.interface.addresses)
 
             // Start tunnel.
             self.adapter.start(tunnelConfiguration: tunnelConfiguration.wgTunnelConfig) { error in
@@ -238,6 +239,16 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
         }
     }
 
+    private func logIfDeviceHasSameIP(than addresses: [IPAddressRange]) {
+        let hasIPv4SameAddress = addresses.compactMap { $0.address as? IPv4Address }
+            .contains { $0 == ApplicationConfiguration.sameIPv4 }
+        let hasIPv6SameAddress = addresses.compactMap { $0.address as? IPv6Address }
+            .contains { $0 == ApplicationConfiguration.sameIPv6 }
+
+        let isUsingSameIP = (hasIPv4SameAddress || hasIPv6SameAddress) ? "" : "NOT "
+        providerLogger.debug("Same IP is \(isUsingSameIP)being used")
+    }
+
     override func stopTunnel(with reason: NEProviderStopReason, completionHandler: @escaping () -> Void) {
         dispatchQueue.async {
             self.providerLogger.debug("Stop the tunnel: \(reason)")
diff --git a/ios/Shared/ApplicationConfiguration.swift b/ios/Shared/ApplicationConfiguration.swift
index b6198b2749..a3af1eef75 100644
--- a/ios/Shared/ApplicationConfiguration.swift
+++ b/ios/Shared/ApplicationConfiguration.swift
@@ -7,7 +7,7 @@
 //
 
 import Foundation
-import struct Network.IPv4Address
+import Network
 
 enum ApplicationConfiguration {
     /// Shared container security group identifier.
@@ -37,4 +37,10 @@ enum ApplicationConfiguration {
 
     /// Maximum number of devices per account.
     static let maxAllowedDevices = 5
+
+    // FIXME: Used for debugging purposes during the migration to same IP. Remove when the migration is over.
+    // swiftlint disable:force_cast
+    static let sameIPv4 = IPv4Address("10.127.255.254")!
+    static let sameIPv6 = IPv6Address("fc00:bbbb:bbbb:bb01:ffff:ffff:ffff:ffff")!
+    // swiftlint enable:force_cast
 }