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Source file src/net/sockoptip_linux.go

     1	// Copyright 2011 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	package net
     6	
     7	import (
     8		"os"
     9		"syscall"
    10	)
    11	
    12	func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
    13		var v int32
    14		if ifi != nil {
    15			v = int32(ifi.Index)
    16		}
    17		mreq := &syscall.IPMreqn{Ifindex: v}
    18		if err := fd.incref(); err != nil {
    19			return err
    20		}
    21		defer fd.decref()
    22		return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreqn(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, mreq))
    23	}
    24	
    25	func setIPv4MulticastLoopback(fd *netFD, v bool) error {
    26		if err := fd.incref(); err != nil {
    27			return err
    28		}
    29		defer fd.decref()
    30		return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v)))
    31	}
    32	

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