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Commit Graph

4174 Commits

Author SHA1 Message Date
Katerina Kubecova
bcf2327425 BGP: Send hold timer
Implement BGP Send hold timer according to draft-ietf-idr-bgp-sendholdtimer.
The Send hold timer drops the session if the neighbor is sending keepalives,
but does not receive our messages, causing the TCP connection to stall.
2023-12-05 04:14:45 +01:00
Ondrej Zajicek
3fb06fea1d BGP: Add options to require BGP capabilities
Some BGP capabilities change the BGP behavior in a significant way, so if
the configuration depends on it, it is better to not establish BGP
session when the capability is not available.

Add several BGP option to require individual BGP capabilities during
session negotiation.
2023-11-23 20:54:22 +01:00
Ondrej Zajicek
b6923f6386 BGP: Simplify capability handling 2023-11-23 17:18:04 +01:00
Soha Jin
31aa62ae6d OSPF: On physical PtP links, skip next-hop resolving
Signed-off-by: Soha Jin <soha@jin.sh>
Co-developed-by: Wende Tan <twd2.me@gmail.com>
2023-11-09 14:33:25 +01:00
Ondrej Zajicek
a740054db5 Nest: Minor fixes in MPLS 2023-10-25 18:25:46 +02:00
Michal Rada
06301a991d Doc: prefix match prefix pattern definition typo (in sets of prefixes definition) 2023-10-24 18:02:40 +02:00
Ondrej Zajicek
63f1c4d918 Use RTA_MAX_SIZE in rta_do_cow()
This allows to modify MPLS label stack in filters. Fixes a bug in
handling of 'gw_mpls' attribute.
2023-10-24 14:25:18 +02:00
Maria Matejka
108c4cfaf3 Autoconf: minor reduction of redundancy
Joined BIRD_CHECK_GCC_OPTION and BIRD_ADD_GCC_OPTION.
2023-10-24 12:45:08 +02:00
Ondrej Zajicek
c9b7b03211 CI: Update for new netlab worker
- Change tag from 'birdlab' to 'netlab'
 - Change path of gitlab-runner home dir
 - Use stayrtr from Debian
2023-10-18 03:37:59 +02:00
Ondrej Zajicek
5973031460 CI: Add MPLS tests 2023-10-16 15:34:01 +02:00
Ondrej Zajicek
b5e9e5197b MPLS: Fix issue with recursive MPLS routes
Recursive MPLS routes used hostentry from the original route, which
triggered different table than MPLS table, and therefore were not
updated.
2023-10-16 15:21:36 +02:00
Ondrej Zajicek
0e1fbaa5b2 NEWS and version update 2023-10-06 18:53:25 +02:00
Ondrej Zajicek
23f94b1368 Doc: Minor fixes 2023-10-06 18:52:02 +02:00
Ondrej Zajicek
c5c3a22bcc Conf: Bytestrings with hex: should use the same general format as ones without.
Either hex:01234567, or hex:01:23:45:67. No confusing formats like
hex:0123:4567🆎cdef, which looks like there is an implicit zero byte.
2023-10-06 04:59:47 +02:00
Pavel Šorejs
e83beb70bd KRT: Allow to learn routes with RTPROT_KERNEL
The Kernel protocol, even with the option 'learn' enabled, ignores
direct routes created by the OS kernel (on Linux these are routes
with rtm_protocol == RTPROT_KERNEL).

Implement optional behavior where both OS kernel and third-party routes
are learned, it can be enabled by 'learn all' option.

Minor changes by committer.
2023-10-06 04:55:56 +02:00
Ondrej Zajicek
57aa077227 BGP: Improve custom BGP attributes
- Implement EA_GET for custom BGP attributes
 - Forbid EA_SET on existing opaque attributes
 - Forbid redefining existing attributes
 - Document possible compatibility problems
2023-10-05 21:54:25 +02:00
Ondrej Zajicek
ba01a6f2e6 MPLS: Handle compatibility with old configs
Old configs do not define MPLS domains and may use a static protocol
to define static MPLS routes.

When MPLS channel is the only channel of static protocol, handle it
as a main channel. Also, define implicit MPLS domain if needed and
none is defined.
2023-10-05 17:54:43 +02:00
Ondrej Zajicek
de09fda5dc Filter: Fix scope handling in for loops
Changes in scope implementation broke scope handling in for loops.
The term in for loops is supposed to be parsed in the parent scope.
2023-10-05 14:26:22 +02:00
Ondrej Zajicek
abae806efd Conf: Fix 'show symbols'
Seems like the root scope was not marked as active.
2023-10-04 20:16:13 +02:00
Ondrej Zajicek
ab47c2ae46 BGP: Custom attribute definitions should use cfg_alloc(), not malloc()
Otherwise we would get memory leaks.
2023-10-04 20:16:13 +02:00
Maria Matejka
d41b06238d Filter: explicitly forbidden for-loop with pre-defined variable 2023-10-04 19:57:55 +02:00
Ondrej Zajicek
6a242b3ec6 IO: Fix race condition in event processing
When regular event was added from work event, we did remember that
regular event list was empty and therefore we did not use zero time
in poll(). This leads to ~3 s latency in route reload during
reconfiguration.
2023-10-04 17:36:03 +02:00
Ondrej Zajicek
0bfa216f49 Doc: Fix syntax errors in SGML 2023-10-04 15:25:05 +02:00
Ondrej Zajicek
be09b030ed MPLS: Update to support and use 64bit source id 2023-10-04 15:00:24 +02:00
Ondrej Zajicek
cab5fce2b6 Doc: L3VPN documentation 2023-10-04 13:12:05 +02:00
Ondrej Zajicek
8a70885694 Doc: MPLS documentation 2023-10-04 13:12:05 +02:00
Ondrej Zajicek
8f5511dafb L3VPN: Import/export target reconfiguration 2023-10-04 13:12:05 +02:00
Ondrej Zajicek
d8130da86b BGP, L3VPN: Fix MPLS channel reload
When a MPLS channel is reloaded, it should reload all regular MPLS-aware
channels. This causes re-evaluation of routes in FEC map and possibly
reannouncement of MPLS routes.
2023-10-04 13:12:05 +02:00
Ondrej Zajicek
a7a9df8639 MPLS: Implement FEC map reconfiguration
This allows changing label policy or label range without restart.
2023-10-04 13:12:05 +02:00
Ondrej Zajicek
9b775859cd MPLS: Handle label allocation failures 2023-10-04 13:12:05 +02:00
Ondrej Zajicek
e915f99e1c L3VPN: Fix bug in reconfiguration
Fields import_target / export_target link to config structures, must be
updated during reconfiguration.
2023-10-04 13:12:05 +02:00
Ondrej Zajicek
b6385decb3 MPLS: Improve handling of static label allocations
Use mpls_new_label() / mpls_free_label() also for static labels, to keep
track of allocated labels and to enforce label ranges.

Static label allocations always use static label range, regardless of
configured label range.
2023-10-04 13:12:05 +02:00
Ondrej Zajicek
81a20ca5d8 Static: Add syntax for static MPLS labels
Instead of just using route attributes, static routes with
static MPLS labels can be defined just by e.g.:

  route 10.1.1.0/24 mpls 100 via 10.1.2.1 mpls 200;
2023-10-04 13:12:05 +02:00
Ondrej Zajicek
3572605151 MPLS: Label range non-intersection check 2023-10-04 13:12:05 +02:00
Ondrej Zajicek
fcf2258620 MPLS: Improve label range reconfiguration
Allow to shorten label range over unused area.
2023-10-04 13:12:05 +02:00
Ondrej Zajicek
8e9e013b0d MPLS: Add command 'show mpls ranges'
Add command to show MPLS label ranges and their stats.
2023-10-04 13:12:05 +02:00
Ondrej Zajicek
3397ca51f8 Nest: Fix missing RTS_* values in filters 2023-10-04 13:12:05 +02:00
Ondrej Zajicek
e338c4b63c Lib: Extend MPLS label allocator bitmap
Add function lmap_last_one_in_range() for finding the last active label
in a label range.
2023-10-04 13:07:33 +02:00
Ondrej Zajicek
bcff3ae79a L3VPN: BGP/MPLS VPNs using MPLS backbone
The L3VPN protocol implements RFC 4364 BGP/MPLS VPNs using MPLS backbone.
It works similarly to pipe. It connects IP table (one per VRF) with (global)
VPN table. Routes passed from VPN table to IP table are stripped of RD and
filtered by import targets, routes passed in the other direction are extended
with RD, MPLS labels and export targets in extended communities. A separate
MPLS channel is used to announce MPLS routes for the labels.
2023-10-04 13:07:28 +02:00
Ondrej Zajicek
9ca86ef69c MPLS: Add support for per-VRF labeling policy
The new labeling policy MPLS_POLICY_VRF assigns one label to all routes
(from the same FEC map associated with one VRF), while replaces their
next hops with a lookup to a VRF table. This is useful for L3VPN
protocol.
2023-10-04 13:01:21 +02:00
Ondrej Zajicek
9d456d5366 BGP: Add MPLS support
When MPLS is active, received routes on MPLS-aware SAFIs (ipvX-mpls,
vpnX-mpls) are automatically labeled according to active label policy and
corresponding MPLS routes are automatically generated. Also routes sent
on MPLS-aware SAFIs announce local labels when it should be done.
2023-10-04 13:01:21 +02:00
Ondrej Zajicek
15c86ed061 Static: Add MPLS support
When MPLS is active, static IP/VPN routes are automatically labeled
according to active label policy and corresponding MPLS routes are
automatically generated.
2023-10-04 13:01:21 +02:00
Ondrej Zajicek
333ddd4f98 MPLS subsystem
The MPLS subsystem manages MPLS labels and handles their allocation to
MPLS-aware routing protocols. These labels are then attached to IP or VPN
routes representing label switched paths -- LSPs.

There was already a preliminary MPLS support consisting of MPLS label
net_addr, MPLS routing tables with static MPLS routes, remote labels in
next hops, and kernel protocol support.

This patch adds the MPLS domain as a basic structure representing local
label space with dynamic label allocator and configurable label ranges.
To represent LSPs, allocated local labels can be attached as route
attributes to IP or VPN routes with local labels as attributes.

There are several steps for handling LSP routes in routing protocols --
deciding to which forwarding equivalence class (FEC) the LSP route
belongs, allocating labels for new FECs, announcing MPLS routes for new
FECs, attaching labels to LSP routes. The FEC map structure implements
basic code for managing FECs in routing protocols, therefore existing
protocols can be made MPLS-aware by adding FEC map and delegating
most work related to local label management to it.
2023-10-04 13:01:21 +02:00
Ondrej Zajicek (work)
e55696a4f8 Lib: Indirect bitmap for MPLS label allocator 2023-10-04 13:01:21 +02:00
Ondrej Zajicek
21213be523 Nest: Expand rte_src.private_id to u64
In general, private_id is sparse and protocols may want to map some
internal values directly into it. For example, L3VPN needs to
map VPN route discriminators to private_id.

OTOH, u32 is enough for global_id, as these identifiers are dense.
2023-10-02 15:09:30 +02:00
Maria Matejka
8ad9c4bb33 BGP config: Splitting Route Refresh and Enhanced Route Refresh
Both toggles are on by default but if some implementation needs one or
another to be switched off separately, then it's possible now.
2023-09-27 20:18:46 +02:00
Maria Matejka
a4adb09f5a Aggregator: brief documentation 2023-09-26 15:46:24 +02:00
Maria Matejka
018a77fc0b Aggregator: Forbidden dangerous filter computations 2023-09-26 15:46:24 +02:00
Maria Matejka
8674d7ab4b Aggregator: Fixed hashing of adata 2023-09-26 15:46:24 +02:00
Igor Putovny
977b82fba4 Basic route aggregation
Add a new protocol offering route aggregation.

User can specify list of route attributes in the configuration file and
run route aggregation on the export side of the pipe protocol. Routes are
sorted and for every group of equivalent routes new route is created and
exported to the routing table. It is also possible to specify filter
which will run for every route before aggregation.

Furthermore, it will be possible to set attributes of new routes
according to attributes of the aggregated routes.

This is a work in progress.

Original work by Igor Putovny, subsequent cleanups and finalization by
Maria Matejka.
2023-09-26 15:46:24 +02:00