turns out Windows can do packetInfoIPv6

Author: gregcotten

FlyingSocks/Sources/Socket+WinSock2.swift

@@ -62,6 +62,7 @@ extension Socket {
     static let ipproto_ipv6 = Int32(IPPROTO_IPV6.rawValue)
     static let ip_pktinfo = Int32(IP_PKTINFO)
     static let ipv6_pktinfo = Int32(IPV6_PKTINFO)
+    static let ipv6_recvpktinfo = Int32(IPV6_PKTINFO)
 
     static func makeAddressINET(port: UInt16) -> WinSDK.sockaddr_in {
         WinSDK.sockaddr_in(

FlyingSocks/Sources/Socket.swift

@@ -126,10 +126,8 @@ public struct Socket: Sendable, Hashable {
         switch domain {
         case AF_INET:
             try setValue(true, for: .packetInfoIP)
-        #if !canImport(WinSDK)
         case AF_INET6:
             try setValue(true, for: .packetInfoIPv6)
-        #endif
         default:
             return
         }
@@ -568,18 +566,16 @@ public extension SocketOption where Self == BoolSocketOption {
         BoolSocketOption(level: Socket.ipproto_ip, name: Socket.ip_pktinfo)
     }
 
+    static var packetInfoIPv6: Self {
+        BoolSocketOption(level: Socket.ipproto_ipv6, name: Socket.ipv6_recvpktinfo)
+    }
+
     #if canImport(WinSDK)
     static var exclusiveLocalAddressReuse: Self {
         BoolSocketOption(name: ~SO_REUSEADDR) // SO_EXCLUSIVEADDRUSE macro
     }
     #endif
 
-    #if !canImport(WinSDK)
-    static var packetInfoIPv6: Self {
-        BoolSocketOption(level: Socket.ipproto_ipv6, name: Socket.ipv6_recvpktinfo)
-    }
-    #endif
-
     #if canImport(Darwin)
     // Prevents SIG_TRAP when app is paused / running in background.
     static var noSIGPIPE: Self {

FlyingSocks/Tests/SocketTests.swift

@@ -331,7 +331,6 @@ struct SocketTests {
         )
     }
 
-    #if !canImport(WinSDK)
     @Test
     func makes_datagram_ip6() throws {
         let socket = try Socket(domain: Int32(sa_family_t(AF_INET6)), type: .datagram)
@@ -340,7 +339,6 @@ struct SocketTests {
             try socket.getValue(for: .packetInfoIPv6) == true
         )
     }
-    #endif
 }
 
 extension Socket.Flags {