[Openswan dev] Invalid argument NULL (patch from users)

Nicolas Thauvin nicolas.thauvin at cellicium.com
Fri Dec 16 15:22:12 CET 2005

Hi all,

  We have been trying to establish a tunnel using null-sha as ESP with an  
egyptian peer (encryption is not allowed there). Using v2.4.4, we got the  
following error in logs :

ERROR: netlink response for Add SA esp.<.....>@<ip obscured> included  
errno 22: Invalid argument

Digging the mailing list, we found a patch in Openswan Users ML from  
Herbert Xu


Question is : why this patch was not ported into mainstream for the last  
year as it allows to establish an unencrypted tunnel with a Cisco without  
apparent drawback ?

(See attachment for a 2.4.5dr3 version of the patch)
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