Struct DisplayMessage 

pub struct DisplayMessage<'a> {
    pub title: Cow<'a, str>,
    pub text: Cow<'a, str>,
    pub severity: Cow<'a, str>,
    pub impacts_connectivity: bool,
    pub primary_action: Option<DisplayMessageAction<'a>>,
}

A structured health/display message pushed by the control plane (Go tailcfg.DisplayMessage, capver 117), surfaced to the user as a warning/notice about node or tailnet state.

#[serde(default)] makes every field optional (Go marshals Title/Text/Severity with no omitempty, but a tolerant decode shouldn’t fail on a sparse message), and there is deliberately no deny_unknown_fields: Go adds fields to this struct over time, and an unknown field must not fail the whole netmap decode.

Fields

title: Cow<'a, str>

Short, human-readable title summarizing the message.

Cow because admin/control-authored prose can contain a JSON escape (a literal ", \, or — since Go’s json.Marshal escapes &/</> by default — an &); a borrowed &str cannot decode an escaped string and would fail the whole MapResponse decode.

text: Cow<'a, str>

Longer, human-readable body text describing the message. Cow for the same escape-tolerance reason as title (and body prose is the most likely to contain a newline).

severity: Cow<'a, str>

Severity of the message. Go’s DisplayMessageSeverity is a string with known values "high", "medium", and "low"; this is kept as an open Cow<'a, str> (rather than a closed enum) so an unrecognized future severity decodes rather than failing the netmap.

impacts_connectivity: bool

Whether the condition this message describes impacts the node’s connectivity.

primary_action: Option<DisplayMessageAction<'a>>

Optional primary call-to-action (e.g. a “learn more”/“fix it” link) for this message.

Trait Implementations

impl<'a> Clone for DisplayMessage<'a>

fn clone(&self) -> DisplayMessage<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for DisplayMessage<'a>

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

Formats the value using the given formatter.

impl<'a> Default for DisplayMessage<'a>

fn default() -> DisplayMessage<'a>

Returns the “default value” for a type.

impl<'de: 'a, 'a> Deserialize<'de> for DisplayMessage<'a>

where DisplayMessage<'a>: Default,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a> Eq for DisplayMessage<'a>

impl<'a> PartialEq for DisplayMessage<'a>

fn eq(&self, other: &DisplayMessage<'a>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<'a> StructuralPartialEq for DisplayMessage<'a>