SocketsBSDIOS.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "IPAddressBSDIOS.h"
#include "BSDSockets/SocketSubsystemBSDPrivate.h"
#include "Sockets.h"
#include "BSDSockets/SocketsBSD.h"
 
class FInternetAddr;
 
class FSocketBSDIOS
    : public FSocketBSD
{
public:
 
    FSocketBSDIOS(SOCKET InSocket, ESocketType InSocketType, const FString& InSocketDescription, const FName& InSocketProtocol, ISocketSubsystem* InSubsystem)
        :FSocketBSD(InSocket, InSocketType, InSocketDescription, InSocketProtocol, InSubsystem)
    {
    }
 
    virtual ~FSocketBSDIOS()
    {
        FSocketBSD::Close();
    }
 
    virtual bool JoinMulticastGroup(const FInternetAddr& GroupAddress, const FInternetAddr& InterfaceAddress) override
    {
        const FInternetAddrBSDIOS& IOSInterfaceAddr = static_cast<const FInternetAddrBSDIOS&>(InterfaceAddress);
        // iOS does not allow usage of an interface id of 0, so redirect to using the group address instead
        if (GroupAddress.GetProtocolType() == FNetworkProtocolTypes::IPv6 && IOSInterfaceAddr.GetScopeId() == 0)
        {
            return FSocketBSD::JoinMulticastGroup(GroupAddress);
        }
 
        return FSocketBSD::JoinMulticastGroup(GroupAddress, InterfaceAddress);
    }
 
    virtual bool LeaveMulticastGroup(const FInternetAddr& GroupAddress, const FInternetAddr& InterfaceAddress) override
    {
        const FInternetAddrBSDIOS& IOSInterfaceAddr = static_cast<const FInternetAddrBSDIOS&>(InterfaceAddress);
        if (GroupAddress.GetProtocolType() == FNetworkProtocolTypes::IPv6 && IOSInterfaceAddr.GetScopeId() == 0)
        {
            return FSocketBSD::LeaveMulticastGroup(GroupAddress);
        }
 
        return FSocketBSD::LeaveMulticastGroup(GroupAddress, InterfaceAddress);
    }
};