mirror of
https://github.com/Luzifer/vault-openvpn.git
synced 2024-11-10 01:00:08 +00:00
93 lines
4.5 KiB
Go
93 lines
4.5 KiB
Go
// Copyright 2014 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 ipv4
|
|
|
|
import (
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
"syscall"
|
|
"unsafe"
|
|
|
|
"golang.org/x/net/internal/iana"
|
|
"golang.org/x/net/internal/socket"
|
|
)
|
|
|
|
var (
|
|
ctlOpts = [ctlMax]ctlOpt{
|
|
ctlTTL: {sysIP_RECVTTL, 1, marshalTTL, parseTTL},
|
|
ctlDst: {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
|
|
ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
|
|
}
|
|
|
|
sockOpts = map[int]*sockOpt{
|
|
ssoTOS: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
|
|
ssoTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
|
|
ssoMulticastTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 1}},
|
|
ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
|
|
ssoMulticastLoopback: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
|
|
ssoReceiveTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVTTL, Len: 4}},
|
|
ssoReceiveDst: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVDSTADDR, Len: 4}},
|
|
ssoReceiveInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVIF, Len: 4}},
|
|
ssoHeaderPrepend: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
|
|
ssoStripHeader: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_STRIPHDR, Len: 4}},
|
|
ssoJoinGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_ADD_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
|
|
ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_DROP_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
|
|
}
|
|
)
|
|
|
|
func init() {
|
|
// Seems like kern.osreldate is veiled on latest OS X. We use
|
|
// kern.osrelease instead.
|
|
s, err := syscall.Sysctl("kern.osrelease")
|
|
if err != nil {
|
|
return
|
|
}
|
|
ss := strings.Split(s, ".")
|
|
if len(ss) == 0 {
|
|
return
|
|
}
|
|
// The IP_PKTINFO and protocol-independent multicast API were
|
|
// introduced in OS X 10.7 (Darwin 11). But it looks like
|
|
// those features require OS X 10.8 (Darwin 12) or above.
|
|
// See http://support.apple.com/kb/HT1633.
|
|
if mjver, err := strconv.Atoi(ss[0]); err != nil || mjver < 12 {
|
|
return
|
|
}
|
|
ctlOpts[ctlPacketInfo].name = sysIP_PKTINFO
|
|
ctlOpts[ctlPacketInfo].length = sizeofInetPktinfo
|
|
ctlOpts[ctlPacketInfo].marshal = marshalPacketInfo
|
|
ctlOpts[ctlPacketInfo].parse = parsePacketInfo
|
|
sockOpts[ssoPacketInfo] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVPKTINFO, Len: 4}}
|
|
sockOpts[ssoMulticastInterface] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: sizeofIPMreqn}, typ: ssoTypeIPMreqn}
|
|
sockOpts[ssoJoinGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}
|
|
sockOpts[ssoLeaveGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}
|
|
sockOpts[ssoJoinSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
|
|
sockOpts[ssoLeaveSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
|
|
sockOpts[ssoBlockSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
|
|
sockOpts[ssoUnblockSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
|
|
}
|
|
|
|
func (pi *inetPktinfo) setIfindex(i int) {
|
|
pi.Ifindex = uint32(i)
|
|
}
|
|
|
|
func (gr *groupReq) setGroup(grp net.IP) {
|
|
sa := (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gr)) + 4))
|
|
sa.Len = sizeofSockaddrInet
|
|
sa.Family = syscall.AF_INET
|
|
copy(sa.Addr[:], grp)
|
|
}
|
|
|
|
func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
|
|
sa := (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 4))
|
|
sa.Len = sizeofSockaddrInet
|
|
sa.Family = syscall.AF_INET
|
|
copy(sa.Addr[:], grp)
|
|
sa = (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 132))
|
|
sa.Len = sizeofSockaddrInet
|
|
sa.Family = syscall.AF_INET
|
|
copy(sa.Addr[:], src)
|
|
}
|