implementation of the forwarding table based on Bloom filters. More...
#include <btable.h>
Public Member Functions | |
virtual void | consolidate () |
Prepares the forwarding table for matching. More... | |
Public Member Functions inherited from siena::BTable | |
virtual void | ifconfig (if_t, const predicate &) |
Associates a predicate to an interface. More... | |
virtual void | match (const message &, MatchHandler &) const |
Processes a message, calling the output() function on the given MatchHandler object for each matching interface. More... | |
virtual void | match (const message &, MatchMessageHandler &) const |
Processes a message, calling the output() function on the given MatchMessageHandler object for each matching interface. More... | |
virtual void | clear () |
Clears the forwarding table. More... | |
virtual void | clear_recycle () |
Clears the forwarding table. More... | |
virtual size_t | allocated_bytesize () const |
Memory allocated by the forwarding table. More... | |
virtual size_t | bytesize () const |
Memory used by the forwarding table. More... | |
Public Member Functions inherited from siena::ForwardingTable | |
virtual | ~ForwardingTable () |
Destroys the forwarding including all its internal data structures. | |
Additional Inherited Members | |
Protected Attributes inherited from siena::BTable | |
FTAllocator | memory |
Protected allocator of the forwarding table. More... | |
BPredicate * | plist |
list of predicates. More... | |
implementation of the forwarding table based on Bloom filters.
This implementation extends the BTable algorithm simply by sorting the Bloom filters within each predicate. Bloom filters are sorted by their Hamming weight in ascending order. The rationale for this is that the basic BTable algorithm shortcuts the evaluation (only) when a match is found. Therefore, it is advantageous to try "smaller" Bloom filters first, because those are more likely to yield a match.
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virtual |
Prepares the forwarding table for matching.
This function processes the forwarding table, packing some of its internal data structures and preparing them to be used to match events. This function must therefore be called after all the necessary calls to ifconfig and before matching messages with match().
The forwarding table can be reset by calling clear or clear_recycle.
Reimplemented from siena::ForwardingTable.