Checking the HTTPS API or UDP connectivity for WHIP tests can be difficult. For example, if the UDP port isn't available but the API is fine, OBS only says it can't connect to the server. It's hard to see the HTTPS API response or check if the UDP port is available.

This feature lets you set the ice username and password in SRS. You can then send a STUN request using nc and see the response, making it easier to check UDP port connectivity.

1. Use curl to test the WHIP API, including ice-frag and ice-pwd queries.
2. Use nc to send a STUN binding request to test UDP connectivity.
3. If both the API and UDP are working, you should get a STUN response.