Struct aya::maps::hash_map::HashMap

pub struct HashMap<T: Deref<Target = Map>, K, V> { /* fields omitted */ }

A hash map that can be shared between eBPF programs and user space.

Examples

use aya::maps::HashMap;
use std::convert::TryFrom;

let mut redirect_ports = HashMap::try_from(bpf.map_mut("REDIRECT_PORTS")?)?;

// redirect port 80 to 8080
redirect_ports.insert(80, 8080, 0);
// redirect port 443 to 8443
redirect_ports.insert(443, 8443, 0);

Implementations

impl<T: Deref<Target = Map>, K: Pod, V: Pod> HashMap<T, K, V>

pub unsafe fn get(&self, key: &K, flags: u64) -> Result<V, MapError>

Returns a copy of the value associated with the key.

pub unsafe fn iter(&self) -> MapIter<'_, K, V>

An iterator visiting all key-value pairs in arbitrary order. The iterator item type is Result<(K, V), MapError>.

pub unsafe fn keys(&self) -> MapKeys<'_, K>

An iterator visiting all keys in arbitrary order. The iterator element type is Result<K, MapError>.

impl<T: DerefMut<Target = Map>, K: Pod, V: Pod> HashMap<T, K, V>

pub fn insert(&mut self, key: K, value: V, flags: u64) -> Result<(), MapError>

Inserts a key-value pair into the map.

pub fn remove(&mut self, key: &K) -> Result<(), MapError>

Removes a key from the map.

Trait Implementations

impl<'a, K: Pod, V: Pod> TryFrom<&'a Map> for HashMap<&'a Map, K, V>

type Error = MapError

The type returned in the event of a conversion error.

fn try_from(a: &'a Map) -> Result<HashMap<&'a Map, K, V>, MapError>

Performs the conversion.

impl<'a, K: Pod, V: Pod> TryFrom<&'a mut Map> for HashMap<&'a mut Map, K, V>

type Error = MapError

The type returned in the event of a conversion error.

fn try_from(a: &'a mut Map) -> Result<HashMap<&'a mut Map, K, V>, MapError>

Performs the conversion.

impl<K: Pod, V: Pod> TryFrom<MapRef> for HashMap<MapRef, K, V>

type Error = MapError

The type returned in the event of a conversion error.

fn try_from(a: MapRef) -> Result<HashMap<MapRef, K, V>, MapError>

Performs the conversion.

impl<K: Pod, V: Pod> TryFrom<MapRefMut> for HashMap<MapRefMut, K, V>

type Error = MapError

The type returned in the event of a conversion error.

fn try_from(a: MapRefMut) -> Result<HashMap<MapRefMut, K, V>, MapError>

Performs the conversion.