src/runtime.rs


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use crate::model::Trojan;
use anyhow::{Result, bail};
use async_trait::async_trait;

#[async_trait]
pub trait Runtime: Send {
    /// Protection must be installed before durable enabled intent changes.
    async fn arm(&mut self) -> Result<()>;
    async fn apply(&mut self, connection: Option<&Trojan>, generation: u64) -> Result<()>;
    async fn maintain(&mut self, connection: Option<&Trojan>, generation: u64) -> Result<()> {
        self.apply(connection, generation).await
    }
    /// Called only after disabled intent has been durably recorded.
    async fn disable(&mut self) -> Result<()>;
    fn routing(&self) -> &str;
}

/// Allows managing saved subscriptions without claiming that host capture is available.
pub struct OfflineRuntime;
#[async_trait]
impl Runtime for OfflineRuntime {
    async fn arm(&mut self) -> Result<()> {
        bail!("Host networking is unavailable; install and start the Roentgen service")
    }
    async fn apply(&mut self, _: Option<&Trojan>, _: u64) -> Result<()> {
        bail!("Host networking is unavailable")
    }
    async fn disable(&mut self) -> Result<()> {
        Ok(())
    }
    fn routing(&self) -> &str {
        "unavailable"
    }
}