[Openswan dev] [Openswan Users] IP XFRM/Netkey/Stale Routes/%pass

[Martin Lambev]

Hi Rick, 

I'm into the exact same problem as you describe in your openswan mailing list. 

Reference: 
My post:

[Openswan Users] ERROR: netlink XFRM_MSG_DELPOLICY response for	flow eroute_connection delete included errno 2: No such file	or directory

https://lists.openswan.org/pipermail/users/2012-June/021668.html , I'm not going to any tech details, but the main problem remains even in openswan 2.6.38 

Your post:
[Openswan Users] IP XFRM/Netkey/Stale Routes/%pass

https://lists.openswan.org/pipermail/users/2010-September/019322.html


#ip xfrm policy
src 50.50.50.10/32 dst 116.55.126.226/32 proto udp sport 1701 dport 55103 
	dir out priority 2080 ptype main 
	tmpl src 0.0.0.0 dst 0.0.0.0
		proto esp reqid 16401 mode transport
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 4 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 3 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 4 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 3 priority 0 ptype main 

The problem described by you match exactly the trouble that I have, I also try to dig it to the code and compare old vs. new versions 2.6.26 to 2.6.38 kernel_netlink.c file but because I do not understand C I'm lost….

tested with EPEL Openswan 2.6.32 - same issue… 

pluto try to delete the xfrm dir out policy but because there is not exact match ( I think it's client 'dport' is not there at all in the delete statement  ) that's why  it yells: "ERROR: netlink XFRM_MSG_DELPOLICY response for flow eroute_connection delete included errno 2: No such file or directory "

Especially " No such file or directory " shows up if  only if the policy that is left does not match completely. Examlpe could be applaied to the policy shown above:
If we try to delete it with this statement Missing is dport (clients port) # ip xfrm policy delete dir out src 50.50.50.10/32 dst 116.55.126.226/32 proto udp sport 1701
we get this error: RTNETLINK answers: No such file or directory

#ip xfrm policy
src 50.50.50.10/32 dst 116.55.126.226/32 proto udp sport 1701 dport 55103 
	dir out priority 2080 ptype main 
	tmpl src 0.0.0.0 dst 0.0.0.0
		proto esp reqid 16401 mode transport
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 4 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 3 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 4 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 3 priority 0 ptype main

but if we do: # ip xfrm policy delete dir out src 50.50.50.10/32 dst 116.55.126.226/32 proto udp sport 1701 dport 55103
we get no error and dir out policy is deleted, so I guess that dport either is missed in the pluto xfrm delete code ( which I could not locate clearly in kernel_netlink.c  if this is the correct file) 

ip xfrm policy
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 4 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 3 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 4 priority 0 ptype main 
src 0.0.0.0/0 dst 0.0.0.0/0 
	dir 3 priority 0 ptype main 


So can you explain your "dirty hack" with _updown.netkey script? Where are you put this script and how you call it? Is this full script code?

Best Regards,

Martin

 


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