From: Jason A. Donenfeld <Jason@zx2c4.com>
Date: Sat, 22 Dec 2018 04:12:53 +0000 (+0100)
Subject: Do not crash if we can't get socket.fileDescriptor
X-Git-Tag: 0.0.20181225-1~17
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b0b6866c518735ddb96b7f54a1ad2aec6972116f;p=thirdparty%2Fwireguard-apple.git

Do not crash if we can't get socket.fileDescriptor

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---

diff --git a/WireGuard/WireGuardNetworkExtension/PacketTunnelProvider.swift b/WireGuard/WireGuardNetworkExtension/PacketTunnelProvider.swift
index fd6bb9b..e44d298 100644
--- a/WireGuard/WireGuardNetworkExtension/PacketTunnelProvider.swift
+++ b/WireGuard/WireGuardNetworkExtension/PacketTunnelProvider.swift
@@ -38,7 +38,7 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
 
         packetTunnelSettingsGenerator = PacketTunnelSettingsGenerator(tunnelConfiguration: tunnelConfiguration, resolvedEndpoints: resolvedEndpoints)
 
-        let fileDescriptor = packetFlow.value(forKeyPath: "socket.fileDescriptor") as! Int32 //swiftlint:disable:this force_cast
+        let fileDescriptor = (packetFlow.value(forKeyPath: "socket.fileDescriptor") as? Int32) ?? -1
         if fileDescriptor < 0 {
             wg_log(.error, staticMessage: "Starting tunnel failed: Could not determine file descriptor")
             errorNotifier.notify(PacketTunnelProviderError.couldNotDetermineFileDescriptor)