XFRM_MAX_DEPTH is a limit of transformation states to be applied to the same
flow. Two extension headers are used by Mobile IPv6 transformation.
Based on MIPL2 kernel patch.
---
 include/net/xfrm.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index de62a8f..67fe834 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -327,7 +327,11 @@ struct xfrm_tmpl
        __u32                   calgos;
 };
 
+#ifdef CONFIG_XFRM_ADVANCED
+#define XFRM_MAX_DEPTH         6
+#else
 #define XFRM_MAX_DEPTH         4
+#endif
 
 struct xfrm_policy
 {
-- 
1.4.1

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