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flow_dissector: Add flag to stop parsing at L3

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Add an input flag to flow dissector on rather dissection should be
stopped when an L3 packet is encountered. This would be useful if a
caller just wanted to get IP addresses of the outermost header (e.g.
to do an L3 hash).

Signed-off-by: Tom Herbert <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Tom Herbert 2015-09-01 09:24:30 -07:00 • committed by David S. Miller
commit 8306b688f1
2 changed files with 7 additions and 0 deletions
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6
net/core/flow_dissector.c
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@ -200,6 +200,9 @@ ip:
}
}
if (flags & FLOW_DISSECTOR_F_STOP_AT_L3)
goto out_good;
break;
}
case htons(ETH_P_IPV6): {
@ -238,6 +241,9 @@ ipv6:
}
}
if (flags & FLOW_DISSECTOR_F_STOP_AT_L3)
goto out_good;
break;
}
case htons(ETH_P_8021AD):