Function build_response_full 

pub fn build_response_full(
    dialect: u16,
    guid: &[u8; 16],
    now: u64,
    salt: &[u8; 32],
    encryption: Option<u16>,
    signing_algo: Option<u16>,
    compression: &[u16],
    compression_chained: bool,
    require_signing: bool,
    notifications: bool,
) -> Vec<u8> 

Build the NEGOTIATE response body (§2.2.3.1) — no security blob (clients initiate NTLMSSP in SESSION_SETUP).

For dialect 3.1.1 the response carries negotiate contexts ([MS-SMB2] §2.2.3.1.1): PREAUTH_INTEGRITY_CAPABILITIES announcing SHA-512 with a random salt.