net: add test for TLS_FALLBACK_SCSV

third_party/tlslite/tlslite/errors.py

 """Exception classes.
 @sort: TLSError, TLSAbruptCloseError, TLSAlert, TLSLocalAlert, TLSRemoteAlert,
 TLSAuthenticationError, TLSNoAuthenticationError, TLSAuthenticationTypeError,
 TLSFingerprintError, TLSAuthorizationError, TLSValidationError, TLSFaultError
 """
 
 from constants import AlertDescription, AlertLevel
 
 class TLSError(Exception):
     """Base class for all TLS Lite exceptions."""
@@ skipping 30 matching lines @@
         AlertDescription.certificate_unknown: "certificate_unknown",\
         AlertDescription.illegal_parameter: "illegal_parameter",\
         AlertDescription.unknown_ca: "unknown_ca",\
         AlertDescription.access_denied: "access_denied",\
         AlertDescription.decode_error: "decode_error",\
         AlertDescription.decrypt_error: "decrypt_error",\
         AlertDescription.export_restriction: "export_restriction",\
         AlertDescription.protocol_version: "protocol_version",\
         AlertDescription.insufficient_security: "insufficient_security",\
         AlertDescription.internal_error: "internal_error",\
+        AlertDescription.inappropriate_fallback: "inappropriate_fallback",\
         AlertDescription.user_canceled: "user_canceled",\
         AlertDescription.no_renegotiation: "no_renegotiation",\
         AlertDescription.unknown_srp_username: "unknown_srp_username",\
         AlertDescription.missing_srp_username: "missing_srp_username"}
 
 class TLSLocalAlert(TLSAlert):
     """A TLS alert has been signalled by the local implementation.
 
     @type description: int
     @ivar description: Set to one of the constants in
@@ skipping 79 matching lines @@
     pass
 
 class TLSFaultError(TLSError):
     """The other party responded incorrectly to an induced fault.
 
     This exception will only occur during fault testing, when a
     TLSConnection's fault variable is set to induce some sort of
     faulty behavior, and the other party doesn't respond appropriately.
     """
     pass