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f9f7bde3bc
dscp as a search key in table lookups;
+ (re)implement a sysctl variable to control the expire frequency of
pipes and queues when they become empty;
+ add 'queue number' as optional part of the flow_id. This can be
enabled with the command
queue X config mask queue ...
and makes it possible to support priority-based schedulers, where
packets should be grouped according to the priority and not some
fields in the 5-tuple.
This is implemented as follows:
- redefine a field in the ipfw_flow_id (in sys/netinet/ip_fw.h) but
without changing the size or shape of the structure, so there are
no ABI changes. On passing, also document how other fields are
used, and remove some useless assignments in ip_fw2.c
- implement small changes in the userland code to set/read the field;
- revise the functions in ip_dummynet.c to manipulate masks so they
also handle the additional field;
There are no ABI changes in this commit.
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