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1 // Copyright 2012 The Go Authors. All rights reserved. | 1 // Copyright 2012 The Go Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style | 2 // Use of this source code is governed by a BSD-style |
3 // license that can be found in the LICENSE file. | 3 // license that can be found in the LICENSE file. |
4 | 4 |
5 package ipv4 | 5 package ipv4 |
6 | 6 |
7 import ( | 7 import ( |
8 "net" | 8 "net" |
9 "os" | 9 "os" |
10 "syscall" | 10 "syscall" |
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22 err := syscall.SetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_RECVTOS,
boolint(v)) | 22 err := syscall.SetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_RECVTOS,
boolint(v)) |
23 if err != nil { | 23 if err != nil { |
24 return os.NewSyscallError("setsockopt", err) | 24 return os.NewSyscallError("setsockopt", err) |
25 } | 25 } |
26 return nil | 26 return nil |
27 } | 27 } |
28 | 28 |
29 func ipv4MulticastTTL(fd int) (int, error) { | 29 func ipv4MulticastTTL(fd int) (int, error) { |
30 v, err := syscall.GetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_MULTI
CAST_TTL) | 30 v, err := syscall.GetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_MULTI
CAST_TTL) |
31 if err != nil { | 31 if err != nil { |
32 » » return -1, os.NewSyscallError("getsockopt", err) | 32 » » return 0, os.NewSyscallError("getsockopt", err) |
33 } | 33 } |
34 return v, nil | 34 return v, nil |
35 } | 35 } |
36 | 36 |
37 func setIPv4MulticastTTL(fd int, v int) error { | 37 func setIPv4MulticastTTL(fd int, v int) error { |
38 err := syscall.SetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_MULTICAS
T_TTL, v) | 38 err := syscall.SetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_MULTICAS
T_TTL, v) |
39 if err != nil { | 39 if err != nil { |
40 return os.NewSyscallError("setsockopt", err) | 40 return os.NewSyscallError("setsockopt", err) |
41 } | 41 } |
42 return nil | 42 return nil |
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113 mreqn := &syscall.IPMreqn{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp
[3]}} | 113 mreqn := &syscall.IPMreqn{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp
[3]}} |
114 if ifi != nil { | 114 if ifi != nil { |
115 mreqn.Ifindex = int32(ifi.Index) | 115 mreqn.Ifindex = int32(ifi.Index) |
116 } | 116 } |
117 err := syscall.SetsockoptIPMreqn(fd, syscall.IPPROTO_IP, syscall.IP_DROP
_MEMBERSHIP, mreqn) | 117 err := syscall.SetsockoptIPMreqn(fd, syscall.IPPROTO_IP, syscall.IP_DROP
_MEMBERSHIP, mreqn) |
118 if err != nil { | 118 if err != nil { |
119 return os.NewSyscallError("setsockopt", err) | 119 return os.NewSyscallError("setsockopt", err) |
120 } | 120 } |
121 return nil | 121 return nil |
122 } | 122 } |
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