IPAddressBSDIOS.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "SocketSubsystemIOS.h"
#include "BSDSockets/SocketSubsystemBSDPrivate.h"
#include "BSDSockets/IPAddressBSD.h"
 
#if PLATFORM_HAS_BSD_IPV6_SOCKETS
 
class FInternetAddrBSDIOS : public FInternetAddrBSD
{
public:
 
    FInternetAddrBSDIOS(FSocketSubsystemBSD* InSocketSubsystem, FName RequestedProtocol = NAME_None) : 
        FInternetAddrBSD(InSocketSubsystem, RequestedProtocol)
    {
    }
 
    virtual void SetIPv6BroadcastAddress() override
    {
        FSocketSubsystemIOS* SocketSubsystemIOS = static_cast<FSocketSubsystemIOS*>(SocketSubsystem);
        if (SocketSubsystemIOS)
        {
            TSharedPtr<FInternetAddrBSDIOS> MultiCastAddr = StaticCastSharedPtr<FInternetAddrBSDIOS>(SocketSubsystemIOS->GetAddressFromString(TEXT("ff02::1")));
            if (!MultiCastAddr.IsValid())
            {
                UE_LOG(LogSockets, Warning, TEXT("Could not resolve the broadcast address for iOS, this address will just be blank"));
            }
            else
            {
                // Set the address from the query
                SetRawIp(MultiCastAddr->GetRawIp());
 
                // Grab the scope id to set the broadcast address to
                // We could potentially do this with less loops but it's best to make sure that we set an IPv6 scope
                // And iOS could return an IPv4 address if we just called GetLocalHostAddr
                TArray<TSharedRef<FInternetAddr>> BindingAddresses = SocketSubsystemIOS->GetLocalBindAddresses();
                if (BindingAddresses.Num() > 0)
                {
                    for (const auto& BindAddress : BindingAddresses)
                    {
                        if (BindAddress->GetProtocolType() == FNetworkProtocolTypes::IPv6)
                        {
                            uint32 ScopeId = StaticCastSharedRef<FInternetAddrBSDIOS>(BindAddress)->GetScopeId();
                            SetScopeId(ScopeId);
                            break;
                        }
                    }
                }
                else
                {
                    UE_LOG(LogSockets, Warning, TEXT("Could not get binding addresses to set the internal scope id for the broadcast address"));
                }
            }
        }
        else
        {
            UE_LOG(LogSockets, Warning, TEXT("Could not get the socketsubsystem for querying the scope id of the broadcast address"));
        }
        SetPort(0);
    }
};
 
#endif