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// Copyright 2013 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 ipv6
import (
"net"
"syscall"
"unsafe"
"golang.org/x/net/internal/iana"
)
type sysSockoptLen int32
var (
ctlOpts = [ctlMax]ctlOpt{
ctlHopLimit: {sysIPV6_2292HOPLIMIT, 4, marshal2292HopLimit, parseHopLimit},
ctlPacketInfo: {sysIPV6_2292PKTINFO, sysSizeofInet6Pktinfo, marshal2292PacketInfo, parsePacketInfo},
}
sockOpts = [ssoMax]sockOpt{
ssoHopLimit: {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
ssoMulticastInterface: {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
ssoMulticastHopLimit: {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
ssoMulticastLoopback: {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
ssoReceiveHopLimit: {iana.ProtocolIPv6, sysIPV6_2292HOPLIMIT, ssoTypeInt},
ssoReceivePacketInfo: {iana.ProtocolIPv6, sysIPV6_2292PKTINFO, ssoTypeInt},
ssoChecksum: {iana.ProtocolIPv6, sysIPV6_CHECKSUM, ssoTypeInt},
ssoICMPFilter: {iana.ProtocolIPv6ICMP, sysICMP6_FILTER, ssoTypeICMPFilter},
ssoJoinGroup: {iana.ProtocolIPv6, sysIPV6_JOIN_GROUP, ssoTypeIPMreq},
ssoLeaveGroup: {iana.ProtocolIPv6, sysIPV6_LEAVE_GROUP, ssoTypeIPMreq},
}
)
func init() {
// Seems like kern.osreldate is veiled on latest OS X. We use
// kern.osrelease instead.
osver, err := syscall.Sysctl("kern.osrelease")
if err != nil {
return
}
var i int
for i = range osver {
if osver[i] == '.' {
break
}
}
// The IP_PKTINFO and protocol-independent multicast API were
// introduced in OS X 10.7 (Darwin 11.0.0). But it looks like
// those features require OS X 10.8 (Darwin 12.0.0) and above.
// See http://support.apple.com/kb/HT1633.
if i > 2 || i == 2 && osver[0] >= '1' && osver[1] >= '2' {
ctlOpts[ctlTrafficClass].name = sysIPV6_TCLASS
ctlOpts[ctlTrafficClass].length = 4
ctlOpts[ctlTrafficClass].marshal = marshalTrafficClass
ctlOpts[ctlTrafficClass].parse = parseTrafficClass
ctlOpts[ctlHopLimit].name = sysIPV6_HOPLIMIT
ctlOpts[ctlHopLimit].marshal = marshalHopLimit
ctlOpts[ctlPacketInfo].name = sysIPV6_PKTINFO
ctlOpts[ctlPacketInfo].marshal = marshalPacketInfo
ctlOpts[ctlNextHop].name = sysIPV6_NEXTHOP
ctlOpts[ctlNextHop].length = sysSizeofSockaddrInet6
ctlOpts[ctlNextHop].marshal = marshalNextHop
ctlOpts[ctlNextHop].parse = parseNextHop
ctlOpts[ctlPathMTU].name = sysIPV6_PATHMTU
ctlOpts[ctlPathMTU].length = sysSizeofIPv6Mtuinfo
ctlOpts[ctlPathMTU].marshal = marshalPathMTU
ctlOpts[ctlPathMTU].parse = parsePathMTU
sockOpts[ssoTrafficClass].level = iana.ProtocolIPv6
sockOpts[ssoTrafficClass].name = sysIPV6_TCLASS
sockOpts[ssoTrafficClass].typ = ssoTypeInt
sockOpts[ssoReceiveTrafficClass].level = iana.ProtocolIPv6
sockOpts[ssoReceiveTrafficClass].name = sysIPV6_RECVTCLASS
sockOpts[ssoReceiveTrafficClass].typ = ssoTypeInt
sockOpts[ssoReceiveHopLimit].name = sysIPV6_RECVHOPLIMIT
sockOpts[ssoReceivePacketInfo].name = sysIPV6_RECVPKTINFO
sockOpts[ssoReceivePathMTU].level = iana.ProtocolIPv6
sockOpts[ssoReceivePathMTU].name = sysIPV6_RECVPATHMTU
sockOpts[ssoReceivePathMTU].typ = ssoTypeInt
sockOpts[ssoPathMTU].level = iana.ProtocolIPv6
sockOpts[ssoPathMTU].name = sysIPV6_PATHMTU
sockOpts[ssoPathMTU].typ = ssoTypeMTUInfo
sockOpts[ssoJoinGroup].name = sysMCAST_JOIN_GROUP
sockOpts[ssoJoinGroup].typ = ssoTypeGroupReq
sockOpts[ssoLeaveGroup].name = sysMCAST_LEAVE_GROUP
sockOpts[ssoLeaveGroup].typ = ssoTypeGroupReq
sockOpts[ssoJoinSourceGroup].level = iana.ProtocolIPv6
sockOpts[ssoJoinSourceGroup].name = sysMCAST_JOIN_SOURCE_GROUP
sockOpts[ssoJoinSourceGroup].typ = ssoTypeGroupSourceReq
sockOpts[ssoLeaveSourceGroup].level = iana.ProtocolIPv6
sockOpts[ssoLeaveSourceGroup].name = sysMCAST_LEAVE_SOURCE_GROUP
sockOpts[ssoLeaveSourceGroup].typ = ssoTypeGroupSourceReq
sockOpts[ssoBlockSourceGroup].level = iana.ProtocolIPv6
sockOpts[ssoBlockSourceGroup].name = sysMCAST_BLOCK_SOURCE
sockOpts[ssoBlockSourceGroup].typ = ssoTypeGroupSourceReq
sockOpts[ssoUnblockSourceGroup].level = iana.ProtocolIPv6
sockOpts[ssoUnblockSourceGroup].name = sysMCAST_UNBLOCK_SOURCE
sockOpts[ssoUnblockSourceGroup].typ = ssoTypeGroupSourceReq
}
}
func (sa *sysSockaddrInet6) setSockaddr(ip net.IP, i int) {
sa.Len = sysSizeofSockaddrInet6
sa.Family = syscall.AF_INET6
copy(sa.Addr[:], ip)
sa.Scope_id = uint32(i)
}
func (pi *sysInet6Pktinfo) setIfindex(i int) {
pi.Ifindex = uint32(i)
}
func (mreq *sysIPv6Mreq) setIfindex(i int) {
mreq.Interface = uint32(i)
}
func (gr *sysGroupReq) setGroup(grp net.IP) {
sa := (*sysSockaddrInet6)(unsafe.Pointer(&gr.Pad_cgo_0[0]))
sa.Len = sysSizeofSockaddrInet6
sa.Family = syscall.AF_INET6
copy(sa.Addr[:], grp)
}
func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
sa := (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Pad_cgo_0[0]))
sa.Len = sysSizeofSockaddrInet6
sa.Family = syscall.AF_INET6
copy(sa.Addr[:], grp)
sa = (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Pad_cgo_1[0]))
sa.Len = sysSizeofSockaddrInet6
sa.Family = syscall.AF_INET6
copy(sa.Addr[:], src)
}
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