// Copyright 2017 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build linux package ipv4 import ( "unsafe" "golang.org/x/net/bpf" "golang.org/x/net/internal/socket" "golang.org/x/sys/unix" ) func (so *sockOpt) setAttachFilter(c *socket.Conn, f []bpf.RawInstruction) error { prog := unix.SockFprog{ Len: uint16(len(f)), Filter: (*unix.SockFilter)(unsafe.Pointer(&f[0])), } b := (*[unix.SizeofSockFprog]byte)(unsafe.Pointer(&prog))[:unix.SizeofSockFprog] return so.Set(c, b) }