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#![forbid(unsafe_code)]
use crate::{effects::Effect, instance::Instance};
use anyhow::Result;
use async_trait::async_trait;
use diem_logger::info;
use std::fmt;
pub struct PacketLoss {
instance: Instance,
percent: f32,
}
impl PacketLoss {
pub fn new(instance: Instance, percent: f32) -> Self {
Self { instance, percent }
}
}
#[async_trait]
impl Effect for PacketLoss {
async fn activate(&mut self) -> Result<()> {
info!("PacketLoss {:.*}% for {}", 2, self.percent, self.instance);
let cmd = format!(
"tc qdisc add dev eth0 root netem loss {:.*}%",
2, self.percent
);
self.instance.util_cmd(cmd, "ac-packet-loss").await
}
async fn deactivate(&mut self) -> Result<()> {
info!("PacketLoss {:.*}% for {}", 2, self.percent, self.instance);
let cmd = "tc qdisc delete dev eth0 root; true".to_string();
self.instance.util_cmd(cmd, "de-packet-loss").await
}
}
impl fmt::Display for PacketLoss {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(
f,
"PacketLoss {:.*}% for {}",
2, self.percent, self.instance
)
}
}