Find an IP address on this machine to use as a source IP, and
make up a destination IP address based on the source IP.  No
actual messages will be sent, just a couple of IPsec rules are
created and deleted.

Fixes: 5e596ee171ba ("selftests: add xfrm state-policy-monitor to rtnetlink.sh")
Reported-by: Anders Roxell <anders.rox...@linaro.org>
Signed-off-by: Shannon Nelson <shannon.nel...@oracle.com>
---
 tools/testing/selftests/net/rtnetlink.sh | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/rtnetlink.sh 
b/tools/testing/selftests/net/rtnetlink.sh
index 0a2bc6e..b33a371 100755
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -522,8 +522,12 @@ kci_test_macsec()
 #-------------------------------------------------------------------
 kci_test_ipsec()
 {
-       srcip="14.0.0.52"
-       dstip="14.0.0.70"
+       # find an ip address on this machine and make up a destination
+       srcip=`ip -o addr | awk '/inet / { print $4; }' | grep -v "^127" | head 
-1 | cut -f1 -d/`
+       net=`echo $srcip | cut -f1-3 -d.`
+       base=`echo $srcip | cut -f4 -d.`
+       dstip="$net."`expr $base + 1`
+
        algo="aead rfc4106(gcm(aes)) 0x3132333435363738393031323334353664636261 
128"
 
        # flush to be sure there's nothing configured
-- 
2.7.4

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