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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"
"strconv"
"strings"
"syscall"
"unsafe"
"golang.org/x/net/internal/iana"
)
var (
ctlOpts = [ctlMax]ctlOpt{
ctlHopLimit: {sysIPV6_2292HOPLIMIT, 4, marshal2292HopLimit, parseHopLimit},
ctlPacketInfo: {sysIPV6_2292PKTINFO, sizeofInet6Pktinfo, 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.
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[ctlTrafficClass] = ctlOpt{sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass}
ctlOpts[ctlHopLimit] = ctlOpt{sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit}
ctlOpts[ctlPacketInfo] = ctlOpt{sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo}
ctlOpts[ctlNextHop] = ctlOpt{sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop}
ctlOpts[ctlPathMTU] = ctlOpt{sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU}
sockOpts[ssoTrafficClass] = sockOpt{iana.ProtocolIPv6, sysIPV6_TCLASS, ssoTypeInt}
sockOpts[ssoReceiveTrafficClass] = sockOpt{iana.ProtocolIPv6, sysIPV6_RECVTCLASS, ssoTypeInt}
sockOpts[ssoReceiveHopLimit] = sockOpt{iana.ProtocolIPv6, sysIPV6_RECVHOPLIMIT, ssoTypeInt}
sockOpts[ssoReceivePacketInfo] = sockOpt{iana.ProtocolIPv6, sysIPV6_RECVPKTINFO, ssoTypeInt}
sockOpts[ssoReceivePathMTU] = sockOpt{iana.ProtocolIPv6, sysIPV6_RECVPATHMTU, ssoTypeInt}
sockOpts[ssoPathMTU] = sockOpt{iana.ProtocolIPv6, sysIPV6_PATHMTU, ssoTypeMTUInfo}
sockOpts[ssoJoinGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_JOIN_GROUP, ssoTypeGroupReq}
sockOpts[ssoLeaveGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_LEAVE_GROUP, ssoTypeGroupReq}
sockOpts[ssoJoinSourceGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_JOIN_SOURCE_GROUP, ssoTypeGroupSourceReq}
sockOpts[ssoLeaveSourceGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_LEAVE_SOURCE_GROUP, ssoTypeGroupSourceReq}
sockOpts[ssoBlockSourceGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_BLOCK_SOURCE, ssoTypeGroupSourceReq}
sockOpts[ssoUnblockSourceGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_UNBLOCK_SOURCE, ssoTypeGroupSourceReq}
}
func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
sa.Len = sizeofSockaddrInet6
sa.Family = syscall.AF_INET6
copy(sa.Addr[:], ip)
sa.Scope_id = uint32(i)
}
func (pi *inet6Pktinfo) setIfindex(i int) {
pi.Ifindex = uint32(i)
}
func (mreq *ipv6Mreq) setIfindex(i int) {
mreq.Interface = uint32(i)
}
func (gr *groupReq) setGroup(grp net.IP) {
sa := (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gr)) + 4))
sa.Len = sizeofSockaddrInet6
sa.Family = syscall.AF_INET6
copy(sa.Addr[:], grp)
}
func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
sa := (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 4))
sa.Len = sizeofSockaddrInet6
sa.Family = syscall.AF_INET6
copy(sa.Addr[:], grp)
sa = (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 132))
sa.Len = sizeofSockaddrInet6
sa.Family = syscall.AF_INET6
copy(sa.Addr[:], src)
}
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