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l2tp : multicast notification to the registered listeners

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Previously l2tp module did not provide any means for the user space to
get notified when tunnels/sessions are added/modified/deleted.
This change contains the following
- create a multicast group for the listeners to register.
- notify the registered listeners when the tunnels/sessions are
  created/modified/deleted.

Signed-off-by: Bill Hong <bhong@brocade.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: Sven-Thorsten Dietrich <sven@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bill Hong 2014-12-27 10:12:39 -08:00 • committed by David S. Miller
parent 957f094f22
commit 33f72e6f0c
2 changed files with 92 additions and 10 deletions
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1
include/uapi/linux/l2tp.h
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@ -178,5 +178,6 @@ enum l2tp_seqmode {
*/
#define L2TP_GENL_NAME "l2tp"
#define L2TP_GENL_VERSION 0x1
#define L2TP_GENL_MCGROUP "l2tp"
#endif /* _UAPI_LINUX_L2TP_H_ */