krossbow-websocket-core/org.hildan.krossbow.websocket/WebSocketCloseCodes/TLS_HANDSHAKE_FAILURE

TLS_HANDSHAKE_FAILURE

const val TLS_HANDSHAKE_FAILURE: Int = 1015(source)

"1015 is a reserved value and MUST NOT be set as a status code in a Close control frame by an endpoint. It is designated for use in applications expecting a status code to indicate that the connection was closed due to a failure to perform a TLS handshake (e.g., the server certificate can't be verified)."