[stable21] Add support for "turns:" scheme #5087
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Until now no scheme could be configured to connect to the TURN server and "turn:" was used by default. The "turns:" scheme defines a connection over TLS, which in some cases is needed by clients behind a very restrictive firewall that only allows TLS connections. However, encrypted TURN connections also require a certificate to be set in the TURN server, which may not be always available. Moreover, encrypted TURN connections also require a domain. Due to all this now it is possible to set the TURN server scheme to "turn:", "turns:" or both, so the administrator can set the best suiting one. Already configured TURN servers that have no scheme configured yet defaults to "turn:" to keep the same behaviour as before. New configured TURN servers also default to "turn:", as "turns:" has some additional requirements as explained above. Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
"turns:" scheme must be used with a domain. Moreover, in the case of Firefox using "turns:" with an IP address not only prevents connecting with the TURN server even if "turn:" is also specified, it fully breaks the gathering of all candidates. Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
The STUN scheme can not be specified (browsers do not support "stuns:"), but a literal text was added to clarify that the scheme does not need to be included in the input field. Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
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Test failures are unrelated. |
This was referenced Feb 12, 2021
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backport of #5086