Generate a random SRT socket ID for each connection

[michelsbautzen]

Description

The SRT handshake currently uses a fixed socket ID (762640158 / 0x2D74F71E).

This can cause problems when multiple Android devices using RootEncoder connect simultaneously to the same SRT server.

I encountered this issue using two Android devices with Opticast and MediaMTX. Both devices could connect individually, but the second connection failed while the first one was active.

A Wireshark capture showed that both devices were using the same SRT socket ID:

0x2D74F71E

This change generates a random socket ID instead of using the fixed value.

Testing

Tested with:

• two Android devices
• Opticast
• MediaMTX
• both devices connecting simultaneously to the same SRT UDP port
• different SRT stream paths

Before the change, only one device could connect at a time.

After the change, both devices can stream simultaneously through the same MediaMTX SRT listener.

[pedroSG94]

Hello,

This error should be already fixed in the version 2.8.1.
Your PR can be added since the default value proposed is better than my previous value but it is not necessary to work since the value is override and generated in each connection.

Can you confirm that it is fixed using 2.8.1?

[michelsbautzen]

Yes, I can confirm that the issue is fixed in version 2.8.1. I was able to receive both SRT streams from the phones successfully.