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Merge pull request #1354 from aboch/pol

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Few changes in encryption overlay
This commit is contained in:
Madhu Venugopal 2017-03-11 18:21:55 -08:00 • committed by GitHub
commit c85473ad37
1 changed files with 55 additions and 15 deletions
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70
libnetwork/drivers/overlay/encryption.go
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@ -20,7 +20,7 @@ import (
)
const (
mark = uint32(0xD0C4E3)
r = 0xD0C4E3
timeout = 30
pktExpansion = 26 // SPI(4) + SeqN(4) + IV(8) + PadLength(1) + NextHeader(1) + ICV(8)
)
@ -31,6 +31,8 @@ const (
bidir
)
var spMark = netlink.XfrmMark{Value: uint32(r), Mask: 0xffffffff}
type key struct {
value []byte
tag uint32
@ -201,7 +203,7 @@ func programMangle(vni uint32, add bool) (err error) {
var (
p = strconv.FormatUint(uint64(vxlanPort), 10)
c = fmt.Sprintf("0>>22&0x3C@12&0xFFFFFF00=%d", int(vni)<<8)
m = strconv.FormatUint(uint64(mark), 10)
m = strconv.FormatUint(uint64(r), 10)
chain = "OUTPUT"
rule = []string{"-p", "udp", "--dport", p, "-m", "u32", "--u32", c, "-j", "MARK", "--set-mark", m}
a = "-A"
@ -271,6 +273,7 @@ func programSA(localIP, remoteIP net.IP, spi *spi, k *key, dir int, add bool) (f
Proto: netlink.XFRM_PROTO_ESP,
Spi: spi.reverse,
Mode: netlink.XFRM_MODE_TRANSPORT,
Reqid: r,
}
if add {
rSA.Aead = buildAeadAlgo(k, spi.reverse)
@ -296,6 +299,7 @@ func programSA(localIP, remoteIP net.IP, spi *spi, k *key, dir int, add bool) (f
Proto: netlink.XFRM_PROTO_ESP,
Spi: spi.forward,
Mode: netlink.XFRM_MODE_TRANSPORT,
Reqid: r,
}
if add {
fSA.Aead = buildAeadAlgo(k, spi.forward)
@ -325,17 +329,18 @@ func programSP(fSA *netlink.XfrmState, rSA *netlink.XfrmState, add bool) error {
xfrmProgram = ns.NlHandle().XfrmPolicyAdd
}
fullMask := net.CIDRMask(8*len(fSA.Src), 8*len(fSA.Src))
// Create a congruent cidr
s := types.GetMinimalIP(fSA.Src)
d := types.GetMinimalIP(fSA.Dst)
fullMask := net.CIDRMask(8*len(s), 8*len(s))
fPol := &netlink.XfrmPolicy{
Src: &net.IPNet{IP: fSA.Src, Mask: fullMask},
Dst: &net.IPNet{IP: fSA.Dst, Mask: fullMask},
Src: &net.IPNet{IP: s, Mask: fullMask},
Dst: &net.IPNet{IP: d, Mask: fullMask},
Dir: netlink.XFRM_DIR_OUT,
Proto: 17,
DstPort: 4789,
Mark: &netlink.XfrmMark{
Value: mark,
},
Mark: &spMark,
Tmpls: []netlink.XfrmPolicyTmpl{
{
Src: fSA.Src,
@ -343,6 +348,7 @@ func programSP(fSA *netlink.XfrmState, rSA *netlink.XfrmState, add bool) error {
Proto: netlink.XFRM_PROTO_ESP,
Mode: netlink.XFRM_MODE_TRANSPORT,
Spi: fSA.Spi,
Reqid: r,
},
},
}
@ -426,6 +432,8 @@ func (d *driver) secMapWalk(f func(string, []*spi) ([]*spi, bool)) error {
}
func (d *driver) setKeys(keys []*key) error {
// Remove any stale policy, state
clearEncryptionStates()
// Accept the encryption keys and clear any stale encryption map
d.Lock()
d.keys = keys
@ -526,7 +534,7 @@ func updateNodeKey(lIP, aIP, rIP net.IP, idxs []*spi, curKeys []*key, newIdx, pr
}
if newIdx > -1 {
// +RSA2
// +rSA2
programSA(lIP, rIP, spis[newIdx], curKeys[newIdx], reverse, true)
}
@ -535,16 +543,17 @@ func updateNodeKey(lIP, aIP, rIP net.IP, idxs []*spi, curKeys []*key, newIdx, pr
fSA2, _, _ := programSA(lIP, rIP, spis[priIdx], curKeys[priIdx], forward, true)
// +fSP2, -fSP1
fullMask := net.CIDRMask(8*len(fSA2.Src), 8*len(fSA2.Src))
s := types.GetMinimalIP(fSA2.Src)
d := types.GetMinimalIP(fSA2.Dst)
fullMask := net.CIDRMask(8*len(s), 8*len(s))
fSP1 := &netlink.XfrmPolicy{
Src: &net.IPNet{IP: fSA2.Src, Mask: fullMask},
Dst: &net.IPNet{IP: fSA2.Dst, Mask: fullMask},
Src: &net.IPNet{IP: s, Mask: fullMask},
Dst: &net.IPNet{IP: d, Mask: fullMask},
Dir: netlink.XFRM_DIR_OUT,
Proto: 17,
DstPort: 4789,
Mark: &netlink.XfrmMark{
Value: mark,
},
Mark: &spMark,
Tmpls: []netlink.XfrmPolicyTmpl{
{
Src: fSA2.Src,
@ -552,6 +561,7 @@ func updateNodeKey(lIP, aIP, rIP net.IP, idxs []*spi, curKeys []*key, newIdx, pr
Proto: netlink.XFRM_PROTO_ESP,
Mode: netlink.XFRM_MODE_TRANSPORT,
Spi: fSA2.Spi,
Reqid: r,
},
},
}
@ -597,3 +607,33 @@ func (n *network) maxMTU() int {
}
return mtu
}
func clearEncryptionStates() {
nlh := ns.NlHandle()
spList, err := nlh.XfrmPolicyList(netlink.FAMILY_ALL)
if err != nil {
logrus.Warnf("Failed to retrieve SP list for cleanup: %v", err)
}
saList, err := nlh.XfrmStateList(netlink.FAMILY_ALL)
if err != nil {
logrus.Warnf("Failed to retrieve SA list for cleanup: %v", err)
}
for _, sp := range spList {
if sp.Mark != nil && sp.Mark.Value == spMark.Value {
if err := nlh.XfrmPolicyDel(&sp); err != nil {
logrus.Warnf("Failed to delete stale SP %s: %v", sp, err)
continue
}
logrus.Debugf("Removed stale SP: %s", sp)
}
}
for _, sa := range saList {
if sa.Reqid == r {
if err := nlh.XfrmStateDel(&sa); err != nil {
logrus.Warnf("Failed to delete stale SA %s: %v", sa, err)
continue
}
logrus.Debugf("Removed stale SA: %s", sa)
}
}
}