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Channels have now included rt_import_req and rt_export_req to hook into
the table instead of just one list node. This will (in future) allow for:
* channel import and export bound to different tables
* more efficient pipe code (dropping most of the channel code)
* conversion of 'show route' to a special kind of export
* temporary static routes from CLI
The import / export states are also updated to the new algorithms.
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table structures directly
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If a route has been rejected by filter, store that information
to avoid repeated export filter runs on rejected routes.
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information
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Routes are now allocated only when they are just to be inserted to the
table. Updating a route needs a locally allocated route structure.
Ownership of the attributes is also now not transfered from protocols to
tables and vice versa but just borrowed which should be easier to handle
in a multithreaded environment.
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pflags
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Kernel route sync is done by other ways now and this code is not used
currently.
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Direct protocol hooks for IGP metric inside nest/rt-table.c make the
protocol API unnecessarily complex. Instead, we use a proper callback.
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It is an auxiliary key in the routing table, not a route attribute.
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This is needed to provide the protocols the full old route after filters
when export table is enabled.
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tables are present
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Remove assumption that main channel is the only channel.
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One of previous patches broke password list parsing code, fix that.
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Add min/max key length fields to the MAC algorithm description and
validate configured keys before they are used.
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Add support for specifying a password in hexadecimal format, The result
is the same whether a password is specified as a quoted string or a
hex-encoded byte string, this just makes it more convenient to input
high-entropy byte strings as MAC keys.
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The Babel MAC authentication RFC recommends implementing Blake2s as one of
the supported algorithms. In order to achieve do this, add the blake2b and
blake2s hash functions for MAC authentication. The hashing function
implementations are the reference implementations from blake2.net.
The Blake2 algorithms allow specifying an arbitrary output size, and the
Babel MAC spec says to implement Blake2s with 128-bit output. To satisfy
this, we add two different variants of each of the algorithms, one using
the default size (256 bits for Blake2s, 512 bits for Blake2b), and one
using half the default output size.
Update to BIRD coding style done by committer.
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This fixes an internal table cleanup bug introduced
in ff397df7edcbe7a8abca5b419729b9c64c063847.
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This saves some bytes of memory for complex ea's.
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This also fixes memory leaks from import/export tables being never
cleaned up and freed.
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Pipe channels are kind-of implicit, so setting protocol debug flags
should also set pipe debug flags.
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In general, events are code handling some some condition, which is
scheduled when such condition happened and executed independently from
I/O loop. Work-events are a subgroup of events that are scheduled
repeatedly until some (often significant) work is done (e.g. feeding
routes to protocol). All scheduled events are executed during each
I/O loop iteration.
Separate work-events from regular events to a separate queue and
rate limit their execution to a fixed number per I/O loop iteration.
That should prevent excess latency when many work-events are
scheduled at one time (e.g. simultaneous reload of many BGP sessions).
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Also, no automatic reload for BGP channels without import/export table.
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This is an implementation of draft-walton-bgp-hostname-capability-02.
It is implemented since quite some time for FRR and in datacenter, this
gives a nice output to avoid using IP addresses.
It is disabled by default. The hostname is retrieved from uname(2) and
can be overriden with "hostname" option. The domain name is never set
nor displayed.
Minor changes by committer.
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If there are roa_check() calls in channel filters, then the channel
subscribes to ROA table notifications, which are sent when ROA tables
are updated (subject to settle time) and trigger channel reload or
refeed.
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Add macros for recursive filter iteration that allows to examine
all instructions reachable from a filter.
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No longer needed after redesign of export handling.
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(Minor syntactic changes by committer)
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The patch add support for per-channel debug flags, currently just
'states', 'routes', and 'filters'. Flag 'states' is used for channel
state changes, remaining two for routes passed through the channel.
The per-protocol debug flags 'routes'/'filters' still enable reporting
of routes for all channels, to keep existing behavior.
The patch causes minor changes in some log messages.
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Also fixes some more failed asserts due to add_tail().
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When config structures are copied due to template application,
we need to reset list node structure before calling add_tail().
Thanks to Mikael Magnusson for patches.
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