Constant BPF_F_HDR_FIELD_MASK

pub const BPF_F_HDR_FIELD_MASK: i32 = 0xf; // 15i32

Available on crate feature dep_nc only.

BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.

First 4 bits are for passing the header field size.