NULL, NULL, NULL, tls_construct_ctos_supported_versions, NULL
},
{
- /* Must be before key_share */
TLSEXT_TYPE_psk_kex_modes,
EXT_CLIENT_HELLO | EXT_TLS_IMPLEMENTATION_ONLY | EXT_TLS1_3_ONLY,
init_psk_kex_modes, tls_parse_ctos_psk_kex_modes, NULL, NULL,