[strongSwan-dev] Fwd: [StrongSwan]:IPSEC: StrongSwan: reqid mismatching between SA and SP

[jegathesh malaiyappan]

Hi All,

Strongswan Version: Linux strongSwan U4.5.0/K2.6.32.58

I am facing the issue in allocating the req id for IPSec tunnel and Policy.

If we have both the side become a initiator then two SA (in & out) tunnels
created for Single SP.

"reqid" is mismatching between SA and SP.

Node A <------------> Node B

Tunnel established between Node A and Node B.

I am sending the Ping from Node A to Node B and its failing.

Sender Side: (PING Request)
=========================

root at 10:~ >ping -I 2.2.2.2 12.12.12.12
PING 12.12.12.12 (12.12.12.12) from 2.2.2.2 : 56(84) bytes of data.
01:21:03.207543 IP 10.10.10.10 > 10.10.10.11: ESP(spi=0xc869e935,seq=0x1f),
length 96
01:21:04.208366 IP 10.10.10.10 > 10.10.10.11: ESP(spi=0xc869e935,seq=0x20),
length 96

Security Association Table:
========================
root at 10:~ >ip x s
src 10.10.10.10 dst 10.10.10.11
proto esp spi 0xc869e935 reqid 1 mode tunnel
replay-window 0 flag 20
auth hmac(sha1) 0x000e5af11f3ff6385af7c1452e1e472b5e997f16
enc cbc(aes) 0x6eca8ddfa393bb18207de3e75e60bd1d
src 10.10.10.11 dst 10.10.10.10
proto esp spi 0xc699d2d5 reqid 1 mode tunnel
replay-window 0 flag 20
auth hmac(sha1) 0xc8b39b92ac18c211f5eb32cd6d7d9e10095b0413
enc cbc(aes) 0x4997e1f2a391bfdaf1e251fcd18eafd7
src 10.10.10.10 dst 10.10.10.11
proto esp spi 0xc6c50120 reqid 2 mode tunnel
replay-window 0 flag 20
auth hmac(sha1) 0xf132e706c40deeda21e9147f2dee624423468fa0
enc cbc(aes) 0xafdf0fa8e923e35112ace1975044cc75
src 10.10.10.11 dst 10.10.10.10
proto esp spi 0xc599369c reqid 2 mode tunnel
replay-window 0 flag 20
auth hmac(sha1) 0xbf6a1a52216d4daebb5bb18f9b84e119a7248c9e
enc cbc(aes) 0xed45eb6c03ae379b0c51c6739fb74bf9
root at 10:~ >


Receiver Side:
=============
root at 10:~ >01:23:28.005013 IP 10.10.10.10 > 10.10.10.11:
ESP(spi=0xc869e935,seq=0x22),
length 94
01:23:28.005090 IP 2.2.2.2 > 12.12.12.12: ICMP echo request, id 10901, seq
1, length 64

Security Association:
=================
root at 10:~ >ip x s
src 10.10.10.11 dst 10.10.10.10
proto esp spi 0xc599369c reqid 1 mode tunnel
replay-window 0 flag 20
auth hmac(sha1) 0xbf6a1a52216d4daebb5bb18f9b84e119a7248c9e
enc cbc(aes) 0xed45eb6c03ae379b0c51c6739fb74bf9
src 10.10.10.10 dst 10.10.10.11
proto esp spi 0xc6c50120 reqid 1 mode tunnel
replay-window 0 flag 20
auth hmac(sha1) 0xf132e706c40deeda21e9147f2dee624423468fa0
enc cbc(aes) 0xafdf0fa8e923e35112ace1975044cc75
src 10.10.10.11 dst 10.10.10.10
proto esp spi 0xc699d2d5 reqid 2 mode tunnel
replay-window 0 flag 20
auth hmac(sha1) 0xc8b39b92ac18c211f5eb32cd6d7d9e10095b0413
enc cbc(aes) 0x4997e1f2a391bfdaf1e251fcd18eafd7
src 10.10.10.10 dst 10.10.10.11
proto esp spi 0xc869e935 reqid 2 mode tunnel
replay-window 0 flag 20
auth hmac(sha1) 0x000e5af11f3ff6385af7c1452e1e472b5e997f16
enc cbc(aes) 0x6eca8ddfa393bb18207de3e75e60bd1d

Security Policy:
=============
root at 10:~ >ip x p
src 2.2.2.2/32 dst 12.12.12.12/32
dir fwd priority 1
tmpl src 10.10.10.10 dst 10.10.10.11
proto esp reqid 1 mode tunnel
src 2.2.2.2/32 dst 12.12.12.12/32
dir in priority 1
tmpl src 10.10.10.10 dst 10.10.10.11
proto esp reqid 1 mode tunnel
src 12.12.12.12/32 dst 2.2.2.2/32
dir out priority 1
tmpl src 10.10.10.11 dst 10.10.10.10
proto esp reqid 1 mode tunnel


root at 10:~ >cat /proc/net/xfrm_stat
XfrmInError 0
XfrmInBufferError 0
XfrmInHdrError 0
XfrmInNoStates 10
XfrmInStateProtoError 0
XfrmInStateModeError 0
XfrmInStateSeqError 0
XfrmInStateExpired 0
XfrmInStateMismatch 0
XfrmInStateInvalid 0
XfrmInTmplMismatch 121
XfrmInNoPols 0
XfrmInPolBlock 0


Please help me on this.

Thanks.

Regards,
Jegathesh.M
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