| // 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. |
| |
| // +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) |
| } |