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| 1 // Copyright 2014 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 // +build freebsd linux |
| 6 |
| 7 package ipv4 |
| 8 |
| 9 import ( |
| 10 "net" |
| 11 "os" |
| 12 "syscall" |
| 13 ) |
| 14 |
| 15 func joinIPv4Group(fd int, ifi *net.Interface, grp net.IP) error { |
| 16 mreqn := syscall.IPMreqn{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[
3]}} |
| 17 if ifi != nil { |
| 18 mreqn.Ifindex = int32(ifi.Index) |
| 19 } |
| 20 return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreqn(fd, ia
naProtocolIP, sysSockoptJoinGroup, &mreqn)) |
| 21 } |
| 22 |
| 23 func leaveIPv4Group(fd int, ifi *net.Interface, grp net.IP) error { |
| 24 mreqn := syscall.IPMreqn{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[
3]}} |
| 25 if ifi != nil { |
| 26 mreqn.Ifindex = int32(ifi.Index) |
| 27 } |
| 28 return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreqn(fd, ia
naProtocolIP, sysSockoptLeaveGroup, &mreqn)) |
| 29 } |
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