Can not connect on iOS

[peetonn]

Not sure what is happening exactly, but connection is not established -- I see no incoming connections on ROS side and on iOS side I see this log output:

[2021.12.06-23.27.43:612][  0]LogIOS:  FSocketSubsystemIOS::InternalBSDSocketFactory
[2021.12.06-23.27.43:612][  0]LogSockets: Warning: Tried to connect with an address with protocol IPv4 using a socket with protocol IPv6
[2021.12.06-23.27.43:612][  0]LogROSBridge: Error: Could not connect to: 192.168.0.17:9090
[2021.12.06-23.27.43:612][  0]LogROSBridge: Warning: You first have to initialize your ROSTopic before you Subscribe to it.

Trying TCP connection (WebSocket connection crashes right away when app starts).
I thought that it might be expecting IPv6 address and modified UTCPConnection::Initialize call by specifying protocol type:

TSharedRef<FInternetAddr> InternetAddress = ISocketSubsystem::Get(PLATFORM_SOCKETSUBSYSTEM)->CreateInternetAddr(FNetworkProtocolTypes::IPv4);

However, it didn't help. Any ideas on why connection can not be established or how can I get more info on what the problem is?

[peetonn]

Fixed it by enforcing socket to be IPv4. See here.