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authorVenkat Yekkirala <vyekkirala@TrustedCS.com>2006-07-24 23:28:37 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 14:53:23 -0700
commitb6340fcd761acf9249b3acbc95c4dc555d9beb07 (patch)
treed7691da37f840833dae9a14bacd4b657101f5c79 /Documentation/networking/secid.txt
parent892c141e62982272b9c738b5520ad0e5e1ad7b42 (diff)
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[MLSXFRM]: Add security sid to flowi
This adds security to flow key for labeling of flows as also to allow for making flow cache lookups based on the security label seemless. Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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+flowi structure:
+
+The secid member in the flow structure is used in LSMs (e.g. SELinux) to indicate
+the label of the flow. This label of the flow is currently used in selecting
+matching labeled xfrm(s).
+
+If this is an outbound flow, the label is derived from the socket, if any, or
+the incoming packet this flow is being generated as a response to (e.g. tcp
+resets, timewait ack, etc.). It is also conceivable that the label could be
+derived from other sources such as process context, device, etc., in special
+cases, as may be appropriate.
+
+If this is an inbound flow, the label is derived from the IPSec security
+associations, if any, used by the packet.