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Put new non-best routes to the end of list instead of the second
position. Put updated routes to their old position. Position is changed
just by best route selection.
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Most commands like 'show ospf neighbors' fail when protocol is not
specified and there are multiple instances of given protocol type.
This is annoying in BIRD 2, as many protocols have IPv4 and IPv6
instances. The patch changes that by showing output from all protocol
instances of appropriate type.
Note that the patch also removes terminating cli_msg() call from these
commands and moves it to the common iterating code.
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There is nothing in RFCs specifying that id 0 is not allowed. Some
implementations does not support it, while some other use key id 0 by
default. We allow it but start with key id 1 by default.
Thanks to Kenth Eriksson for the bugreport.
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Implement regex-like '+' operator in BGP path masks to match previous
path mask item multiple times. This is useful as ASNs may appear
multiple times in paths due to path prepending for traffic engineering
purposes.
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Resolve neighbors using longest prefix match. Although interface ranges
should not generally collide, it may happen for unnumbered links.
Thanks to Kenth Eriksson for the bugreport.
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change anything
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The bug generated invalid AGGREGATOR attribute during translation of
32bit ASN to 16bit-only BGP peer. The patch fixes that.
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This is merely a const propagation. There was no problem in there.
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Use separate IPv4 and IPv6 implementation of prefix sets. Just this
change makes IPv4 prefix sets 60% smaller and 50% faster.
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Thanks to Robert Scheck <bird@robert-scheck.de> who reported it
and Toke Høiland-Jørgensen <toke@toke.dk> who suggested this patch.
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The old code stored route verdicts and temporary routes directly in
rtable. The new code do not store received routes (it immediately
compares them with exported routes and resolves conflicts) and uses
internal bitmap to keep track of which routes were received and which
needs to be reinstalled.
By not putting 'invalid' temporary routes to rtable, we keep rtable
in consistent state, therefore scan no longer needs to be atomic
operation and could be splitted to multiple events.
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This info is now stored in an internal bmap. Unfortunately, net.flags
is still needed for temporary kernel data.
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The same information is stored in export_map of kernel protocol.
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Channel currently does not have independent pool and uses protocol pool,
which is freed when protocol changes state to down, while channel is
still in flushing. Move some some cleanup code to channel_do_flush()
so it is done before freeing of protocol pool.
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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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