Struct BpfFilters 

pub struct BpfFilters<const N: usize>(/* private fields */);

Collection of BPF socket filters for kernel events.

Implementations

impl<const N: usize> BpfFilters<N>

pub const fn new() -> Self

Creates a new BpfFilters.

pub fn filters(&self) -> &[sock_filter]

Gets a reference to the list of sock_filters.

pub fn bpf_stmt(&mut self, i: &mut usize, code: u16, data: u32) -> Result<()>

Sets the code and data in the BPF socket filter.

Increments the filter index on success.

Returns: Err(Error) if the index is out-of-bounds

pub fn bpf_jmp( &mut self, i: &mut usize, code: u16, data: u32, jt: u8, jf: u8, ) -> Result<()>

Sets all the fields in the BPF socket filter.

Increments the filter index on success.

Returns: Err(Error) if the index is out-of-bounds

pub fn len(&self) -> usize

Gets the length of set socket filters in the BpfFilters.

pub fn is_empty(&self) -> bool

Gets whether the BpfFilters has any set socket filters.

pub fn as_sock_fprog(&mut self) -> sock_fprog

Gets the BpfFilters as a sock_fprog FFI object.

SAFETY: the resulting sock_fprog contains a mutable pointer that should not be accessed directly. The result is meant to be passed to Linux API functions that require sock_fprog.

Trait Implementations

impl<const N: usize> Default for BpfFilters<N>

fn default() -> Self

Returns the “default value” for a type.