Enum ConfigError 

pub enum ConfigError {
    Env(String),
    FileOpen {
        path_to_open: String,
        io_error: Error,
    },
    FileRead {
        path_to_read: String,
        io_error: Error,
    },
    Incompatible {
        kind: IncompatibilityKind,
        object: ObjectKind,
        id: String,
    },
    InvalidFrontendConfig(String),
    InvalidPath(PathBuf),
    ListenerAddressAlreadyInUse(SocketAddr),
    Missing(MissingKind),
    NoFileParent(String),
    SaveStatePath(String),
    SocketPathError(String),
    DeserializeToml(String),
    WrongFrontendProtocol(ListenerProtocol),
    WrongListenerProtocol {
        expected: ListenerProtocol,
        found: Option<ListenerProtocol>,
    },
    InvalidAlpnProtocol(String),
    DisableHttp11WithHttp11Alpn {
        address: String,
    },
    BufferSizeTooSmallForH2 {
        buffer_size: u64,
        minimum: u64,
        listeners: usize,
    },
    InvalidRedirectPolicy(String),
    InvalidRedirectScheme(String),
    InvalidHeaderPosition {
        index: usize,
        position: String,
    },
    InvalidHeaderBytes {
        index: usize,
        field: &'static str,
    },
    HstsEnabledRequired(String),
    HstsOnPlainHttp(String),
}

Variants

Env(String)

FileOpen

Fields

path_to_open: String

io_error: Error

FileRead

Fields

path_to_read: String

io_error: Error

Incompatible

Fields

kind: IncompatibilityKind

object: ObjectKind

id: String

InvalidFrontendConfig(String)

InvalidPath(PathBuf)

ListenerAddressAlreadyInUse(SocketAddr)

Missing(MissingKind)

NoFileParent(String)

SaveStatePath(String)

SocketPathError(String)

DeserializeToml(String)

WrongFrontendProtocol(ListenerProtocol)

WrongListenerProtocol

Fields

expected: ListenerProtocol

found: Option<ListenerProtocol>

InvalidAlpnProtocol(String)

DisableHttp11WithHttp11Alpn

disable_http11 = true and alpn_protocols containing "http/1.1" are mutually exclusive: the proxy advertises http/1.1 to peers, then refuses every connection that negotiates it. The combination is a self-DoS at handshake time. Either drop http/1.1 from alpn_protocols or unset disable_http11.

Fields

address: String

BufferSizeTooSmallForH2

buffer_size is below the H2 minimum (16 393 bytes) but at least one HTTPS listener advertises h2 in its ALPN list. The H2 mux requires 16 384-byte frame payload + 9-byte header to fit in a single kawa buffer; smaller values deadlock streams that carry full-size frames. Either raise buffer_size to ≥ 16 393 or remove h2 from the affected listeners’ alpn_protocols.

Fields

buffer_size: u64

minimum: u64

listeners: usize

InvalidRedirectPolicy(String)

redirect = "<value>" on a frontend used a value the parser doesn’t recognise. Accepted values are forward, permanent, unauthorized (case-insensitive).

InvalidRedirectScheme(String)

redirect_scheme = "<value>" on a frontend used a value the parser doesn’t recognise. Accepted values are use-same, use-http, use-https (case-insensitive).

InvalidHeaderPosition

A [[clusters.<id>.frontends.headers]] entry carried an unknown position value. Accepted values are request, response, both (case-insensitive).

Fields

index: usize

position: String

InvalidHeaderBytes

A [[clusters.<id>.frontends.headers]] entry contains a forbidden byte (NUL, CR, LF, or another C0 control) in its key or value. Accepting these would produce HTTP request/response splitting on the wire (CWE-113) — the worker’s H2 emission path filters them at runtime, but the H1 path serialises raw, so we reject at config-load time as a defense in depth.

Fields

index: usize

field: &'static str

HstsEnabledRequired(String)

An [hsts] block populated max_age, include_subdomains, or preload but did not set enabled. The TOML representation requires enabled to be present whenever the block is — that single field disambiguates “preserve current” / “explicit disable” / “enable” on hot-reconfig partial updates.

HstsOnPlainHttp(String)

An [hsts] block on an HTTP-only listener or frontend. RFC 6797 §7.2 forbids emitting Strict-Transport-Security over plaintext HTTP; sozu rejects the configuration at load time so the non-conformant policy never ships to a worker.

Trait Implementations

impl Debug for ConfigError

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

Formats the value using the given formatter.

impl Display for ConfigError

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

Formats the value using the given formatter.

impl Error for ConfigError

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.