Fields
server_name = 0,
RFC 6066
max_fragment_length = 1,
RFC 6066
status_request = 5,
RFC 6066
supported_groups = 10,
RFC 8422, 7919
signature_algorithms = 13,
RFC 8446
use_srtp = 14,
RFC 5764
heartbeat = 15,
RFC 6520
application_layer_protocol_negotiation = 16,
RFC 7301
signed_certificate_timestamp = 18,
RFC 6962
client_certificate_type = 19,
RFC 7250
server_certificate_type = 20,
RFC 7250
padding = 21,
RFC 7685
pre_shared_key = 41,
RFC 8446
early_data = 42,
RFC 8446
supported_versions = 43,
RFC 8446
cookie = 44,
RFC 8446
psk_key_exchange_modes = 45,
RFC 8446
certificate_authorities = 47,
RFC 8446
oid_filters = 48,
RFC 8446
post_handshake_auth = 49,
RFC 8446
signature_algorithms_cert = 50,
RFC 8446
key_share = 51,
RFC 8446