Enum PreLoginError 

pub enum PreLoginError {
    UnknownToken(u8),
    InvalidEncrypt(u8),
    MissingTerminator,
    TruncatedOptionTable,
    TerminatorOption,
    OptionOutOfBounds {
        offset: usize,
        len: usize,
    },
    MessageTooLarge,
    Packet(PacketFrameError),
    MissingEncryption,
}

Error returned while decoding a pre-login helper value.

Variants

UnknownToken(u8)

The option token is not defined by this helper.

InvalidEncrypt(u8)

The encryption value is not defined by TDS.

MissingTerminator

The option table did not include a terminator byte.

TruncatedOptionTable

The option table terminator appeared in the middle of an option entry.

TerminatorOption

A regular pre-login option used the terminator token.

OptionOutOfBounds

An option offset and length point outside the message buffer.

Fields

offset: usize

Option payload offset.

len: usize

Option payload length.

MessageTooLarge

The assembled pre-login message exceeds the protocol’s 16-bit offsets.

Packet(PacketFrameError)

Packet framing failed.

MissingEncryption

The server PRELOGIN response did not include an encryption option.

Trait Implementations

impl Debug for PreLoginError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for PreLoginError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for PreLoginError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<PacketFrameError> for PreLoginError

fn from(source: PacketFrameError) -> Self

Converts to this type from the input type.

impl PartialEq for PreLoginError

fn eq(&self, other: &PreLoginError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for PreLoginError

impl StructuralPartialEq for PreLoginError