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Use a hierarchical bitmap in a routing table to assign ids to routes, and
then use bitmaps (indexed by route id) in channels to keep track whether
routes were exported. This avoids unreliable and inefficient re-evaluation
of filters for old routes in order to determine whether they were exported.
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Continuation lines may use short form (with space instead of message
number), but this should not be done when previous line is final.
Thanks to Kenth Eriksson for the bugreport and analysis.
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There is a pending draft to make them obsolete
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We already had them defined on BGP level, but they are more general.
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For regular channels do not compare src in export table, as we want to
keep here only the best (exported) route per network.
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The route is changed by rte_make_tmp_attrs(), so we need to compare
net->routes to the original one.
Thanks to Kenth Eriksson for the bugreport.
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(CHECK keyword added by commiter)
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When non-MPLS recursive route resolves to MPLS underlying route,
then it should get MPLS labels from the the underlying route.
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Underlying (IGP) route may lead to PtP link, in this case it does not
need gateway. Which is different than direct route without gateway.
When recursive (BGP) route uses PtP route, it should not use recursive
next hop as immediate next hop, while for direct routes it should.
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Missing cleanup can lead to dangling pointer to old next hops.
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Exported route may be in modified state, we need to get cached one for
rte_same() and rta_clone() to work properly.
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Only channels that are up can be reloaded.
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The patch implements optional internal export table to a channel and
hooks it to BGP so it can be used as Adj-RIB-Out. When enabled, all
exported (post-filtered) routes are stored there. An export table can be
examined using e.g. 'show route export table bgp1.ipv4'.
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Allow to not only use set literals in path masks, but also existing
set constants or set expressions.
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Several BGP channel options (including 'next hop self') could be
reconfigured without session reset, with just route refeed/refresh.
The patch improves reconfiguration code to do it that way.
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Protocol can have specified VRF, in such case it is restricted to a set
of ifaces associated with the VRF, otherwise it can use all interfaces.
The patch allows to specify VRF as 'default', in which case it is
restricted to a set of iface not associated with any VRF.
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Allow multiple BFD instances in separate VRFs, dispatch BFD requests
according to VRFs.
Thanks to Alexander Zubkov for notice and patches.
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Thanks to Vincent Bernat for reporting this.
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Nest requires that nexthops are sorted, the kernel protocol have to
ensure that for alien routes.
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When 'graceful down' command is entered, protocols are shut down
with regard to graceful restart. Namely Kernel protocol does
not remove routes and BGP protocol does not send notification,
just closes the connection.
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"linearize" instead.
This is just a naming change.
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Support for dynamically spawning BGP protocols for incoming connections.
Use 'neighbor range' to specify range of valid neighbor addresses, then
incoming connections from these addresses spawn new BGP instances.
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The temporary atttributes are no longer removed by ea_do_prune(), but
they are undefined by store_tmp_attrs() protocol hooks. This fixes
several bugs where temporary attributes were removed when they should
not or not removed when they should be. The flag EAF_TEMP is no longer
needed and was removed.
Update all protocol make_tmp_attrs() / store_tmp_attrs() hooks to use
helper functions and to handle unset attributes properly.
Also fix some related bugs like improper handling of empty eattr list.
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Keep track of whether OSPF tmpattrs are actually defined for given route
(using flags in rte->pflags). That makes them behave more like real
eattrs so a protocol can define just a subset of them or they can be
undefined by filters.
Do not set ospf_metric2 for other than type 2 external OSPF routes and do
not set ospf_tag for non-external OSPF routes. That also fixes a bug
where internal/inter-area route propagated from one OSPF instance to
another is initiated with infinity ospf_metric2.
Thanks to Yaroslav Dronskii for the bugreport.
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Route flags are mosty internal state of rtable, they are not significant
to whether a route has changed. With the old code, all routes received as
a part of enhanced route refresh are always re-announced to other peers
due to change in REF_STALE.
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... and consted some declarations.
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instruction construct
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This should be revised, there are still ugly things in the filter API.
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This is a major change of how the filters are interpreted. If everything
works how it should, it should not affect you unless you are hacking the
filters themselves.
Anyway, this change should make a huge improvement in the filter performance
as previous benchmarks showed that our major problem lies in the
recursion itself.
There are also some changes in nest and protocols, related mostly to
spreading const declarations throughout the whole BIRD and also to
refactored dynamic attribute definitions. The need of these came up
during the whole work and it is too difficult to split out these
not-so-related changes.
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This also drops the multiplexing of errors with the f_val itself
together with the T_RETURN f_val type flag.
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