Summary

Pion ICE cannot create a connection to turn server if peers are behind a Corporate Proxy.

Motivation

When user configure a turn server in ICEServer configuration using transport tcp, e.g. turn:<my-server>:3478?transport=tcp. The ICE is not able to resolve the TCP address or Dial the turn server if the peers are behind a corporate proxy.
The ICE package uses net.DialTCP which is not aware of the proxy settings hence the dial and connection fails.

Describe alternatives you've considered

User should be able to tell/configure the ICE package that he/she is behind a proxy.
The Ice package implements a Dial method, preferly using "golang.org/x/net/proxy" to dial the turn server via the proxy.

Additional context

We can help implement this if you see above proposal as an acceptable solution.