| // Copyright 2011 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. |
| |
| package net |
| |
| import ( |
| "runtime" |
| "syscall" |
| ) |
| |
| func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error { |
| var v int32 |
| if ifi != nil { |
| v = int32(ifi.Index) |
| } |
| mreq := &syscall.IPMreqn{Ifindex: v} |
| err := fd.pfd.SetsockoptIPMreqn(syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, mreq) |
| runtime.KeepAlive(fd) |
| return wrapSyscallError("setsockopt", err) |
| } |
| |
| func setIPv4MulticastLoopback(fd *netFD, v bool) error { |
| err := fd.pfd.SetsockoptInt(syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v)) |
| runtime.KeepAlive(fd) |
| return wrapSyscallError("setsockopt", err) |
| } |
