Ipv4 multicast addresses not working

kuligs2

Also u sure its a correct multicast addr?
https://networkingtoolbox.net/reference/multicast

Try any of these maybe?

Chukwubuikem

kuligs2
I now understand the cause of the problem. The ipv4 addresses weren't the culprits. The issue was that I assumed that every interface on my computer supports multicast. I have five network interfaces. Only two support multicasting, three don't, so when iterating over the network interfaces and calling the
join_multicast_group(MULTICAST_ADDRESS, interface_name) on each interface, the interfaces which didn't support multicasting were causing the errors. I can now successfully multicast on the two interfaces that supports it.

This brings me to a second problem. The multicasting works well on window machines. I can send or receive udp messages. But somehow, if I export to android, the app can't send out multicast or receive it even after enabling all necessary permissions. I don't know what seem to cause this

Chukwubuikem

kuligs2
kuligs2
I now understand the cause of the problem. The ipv4 addresses weren't the culprits. The issue was that I assumed that every interface on my computer supports multicast. I have five network interfaces. Only two support multicasting, three don't, so when iterating over the network interfaces and calling the
join_multicast_group(MULTICAST_ADDRESS, interface_name) on each interface, the interfaces which didn't support multicasting were causing the errors. I can now successfully multicast on the two interfaces that supports it.

Toxe

What is the exact error message with the line of the engine source code?

Chukwubuikem

Toxe
These

Condition "ret!=0" is true. Returning FAILED
Condition "ret!=0" is true. Returning FAILED
Condition "ret!=0" is true. Returning FAILED

All these errors are flagged on line 17 and it is on line 17 that I called the join_multicast_group method of PeerPacketUDP

kuligs2

Chukwubuikem running your code in 4.4 dev6 does not produce the error.

Toxe

Chukwubuikem I meant what part of the Godot source code produces these errors.

Toxe

Chukwubuikem Firewall issue maybe?

kuligs2

Chukwubuikem

Note: Some Android devices might require the CHANGE_WIFI_MULTICAST_STATE permission for multicast to work.
https://docs.godotengine.org/en/stable/classes/class_packetpeerudp.html#class-packetpeerudp-method-join-multicast-group

Chukwubuikem

Toxe

<C++> drivers/windows/net_socket_winsock.cpp:209 @ _change_multicast_group()

Chukwubuikem

kuligs2
I enabled this and other permission but it's not working

kuligs2

Chukwubuikem yeah but it makes no sense, i mean what does ret means? is this some derogatory abbreviation?

Also are you sure your android is working in IPV4?

Toxe

It's probably this code. I would step through it with a debugger and look at the value of ret.