USB ECM/RNDIS Can't receive broadcast messages

[Coi-l]

Describe the bug
I can't receive udp broadcast messages when using usb ecm or usb rndis.

Board: blackpill: blackpill_f411ce

To Reproduce
Code used:

   struct sockaddr server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    net_sin(&server_addr)->sin_family = AF_INET;
    net_sin(&server_addr)->sin_port = htons(DHCP_SERVER_PORT);
    net_sin(&server_addr)->sin_addr.s_addr = htonl(INADDR_ANY);

    sock = zsock_socket(server_addr.sa_family, SOCK_DGRAM, IPPROTO_UDP);

	ret = zsock_bind(sock, &server_addr, sizeof(server_addr));
	if (ret < 0) {
		LOG_ERR("Failed to bind UDP socket: %d", errno);
		ret = -errno;
	}

Expected behavior
Broadcast packets should be received

Impact
Can't continue with the current feature

Logs and console output

I get this from the usb system:
[00:00:00.475,000] usb_ecm: len 0 req_type 0x21 req 0x43 enabled 1
[00:00:00.475,000] usb_ecm: Set Interface 0 Packet Filter 0x000c not supported
[00:00:00.525,000] usb_ecm: len 0 req_type 0x21 req 0x43 enabled 1
[00:00:00.525,000] usb_ecm: Set Interface 0 Packet Filter 0x000e not supported
[00:00:00.527,000] usb_ecm: len 0 req_type 0x21 req 0x43 enabled 1

I can see the dhcp packets being sent in wireshark

Environment (please complete the following information):

• OS: Linux
• Toolchain: Zephyr SDK
• Commit SHA: Zephyr: 47850a3

Additional context
I am not sure if this is supposed to be supported and I am doing this the wrong way, missing some config option or the like. Or if the current usb system just doesn't support it.

[jfischer-no]

For CDC ECM, SetEthernetPacketFilter, filter bitmaps PACKET_TYPE_MULTICAST and PACKET_TYPE_BROADCAST are required but not implemented by CDC ECM function, what can be considered as a bug.