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Allow SPI to be passed in policy template (#127)

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- It is part of the ID and it is needed when you
  program policies for different SAs which share
  same src and dst

Signed-off-by: Alessandro Boch <aboch@docker.com>
This commit is contained in:
Alessandro Boch 2016-05-25 11:10:56 -07:00 committed by Vish Ishaya
parent 388bbd0e99
commit 9b552a7a61
3 changed files with 7 additions and 3 deletions
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5
xfrm_policy.go
View File

@ -43,12 +43,13 @@ type XfrmPolicyTmpl struct {
Src net.IP
Proto Proto
Mode Mode
Spi int
Reqid int
}
func (t XfrmPolicyTmpl) String() string {
return fmt.Sprintf("{Dst: %v, Src: %v, Proto: %s, Mode: %s, Reqid: 0x%x}",
t.Dst, t.Src, t.Proto, t.Mode, t.Reqid)
return fmt.Sprintf("{Dst: %v, Src: %v, Proto: %s, Mode: %s, Spi: 0x%x, Reqid: 0x%x}",
t.Dst, t.Src, t.Proto, t.Mode, t.Spi, t.Reqid)
}
// XfrmPolicy represents an ipsec policy. It represents the overlay network

2
xfrm_policy_linux.go
View File

@ -75,6 +75,7 @@ func (h *Handle) xfrmPolicyAddOrUpdate(policy *XfrmPolicy, nlProto int) error {
userTmpl.XfrmId.Daddr.FromIP(tmpl.Dst)
userTmpl.Saddr.FromIP(tmpl.Src)
userTmpl.XfrmId.Proto = uint8(tmpl.Proto)
userTmpl.XfrmId.Spi = nl.Swap32(uint32(tmpl.Spi))
userTmpl.Mode = uint8(tmpl.Mode)
userTmpl.Reqid = uint32(tmpl.Reqid)
userTmpl.Aalgos = ^uint32(0)
@ -240,6 +241,7 @@ func parseXfrmPolicy(m []byte, family int) (*XfrmPolicy, error) {
resTmpl.Src = tmpl.Saddr.ToIP()
resTmpl.Proto = Proto(tmpl.XfrmId.Proto)
resTmpl.Mode = Mode(tmpl.Mode)
resTmpl.Spi = int(nl.Swap32(tmpl.XfrmId.Spi))
resTmpl.Reqid = int(tmpl.Reqid)
policy.Tmpls = append(policy.Tmpls, resTmpl)
}

3
xfrm_policy_test.go
View File

@ -147,7 +147,7 @@ func compareTemplates(a, b []XfrmPolicyTmpl) bool {
}
for i, ta := range a {
tb := b[i]
if !ta.Dst.Equal(tb.Dst) || !ta.Src.Equal(tb.Src) ||
if !ta.Dst.Equal(tb.Dst) || !ta.Src.Equal(tb.Src) || ta.Spi != tb.Spi ||
ta.Mode != tb.Mode || ta.Reqid != tb.Reqid || ta.Proto != tb.Proto {
return false
}
@ -190,6 +190,7 @@ func getPolicy() *XfrmPolicy {
Dst: net.ParseIP("127.0.0.2"),
Proto: XFRM_PROTO_ESP,
Mode: XFRM_MODE_TUNNEL,
Spi: 0xabcdef99,
}
policy.Tmpls = append(policy.Tmpls, tmpl)
return policy