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Commit Graph

611 Commits

Author SHA1 Message Date
Ondrej Zajicek
2c7555cf2a Log: Add support for UDP logging
Add support for UDP logging, using RFC 3164 syslog protocol.

Based on the patch from Alexander Zubkov <green@qrator.net>, thanks!
2023-12-13 04:01:09 +01:00
Maria Matejka
4aac1b259f Merge commit '54ddf90f' 2023-12-08 08:30:30 +01:00
Maria Matejka
54ddf90f63 Conf: debug tables
For now just a dummy config but it is needed for forward
compatibility with v3.
2023-12-07 14:38:05 +01:00
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
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
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
0bfa216f49 Doc: Fix syntax errors in SGML 2023-10-04 15:25:05 +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
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
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
katerina.kubecova
a0fb0eaa67 BGP: Setting and unsetting unknown attributes
All these must be declared as bytestring. Allows operators to delete
unwanted attributes breaking the Internet:

    https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling
2023-09-20 14:15:18 +02:00
Ondrej Zajicek
fc4398b4e1 Filter: Better syntax for function return types
The C-style syntax does not really fit into rest of our syntax.
2023-09-12 16:31:52 +02:00
Maria Matejka
fc9d471b36 Filter: Methods rework
Methods can now be called as x.m(y), as long as x can have its type
inferred in config time. If used as a command, it modifies the object,
if used as a value, it keeps the original object intact.

Also functions add(x,y), delete(x,y), filter(x,y) and prepend(x,y) now
spit a warning and are considered deprecated.

It's also possible to call a method on a constant, see filter/test.conf
for examples like bgp_path = +empty+.prepend(1).

Inside instruction definitions (filter/f-inst.c), a METHOD_CONSTRUCTOR()
call is added, which registers the instruction as a method for the type
of its first argument. Each type has its own method symbol table and
filter parser switches between them based on the inferred type of the
object calling the method.

Also FI_CLIST_(ADD|DELETE|FILTER) instructions have been split to allow
for this method dispatch. With type inference, it's now possible.
2023-09-12 16:19:33 +02:00
Maria Matejka
062ff65683 Filter: functions can and should have typed return values 2023-09-12 15:58:07 +02:00
Maria Matejka
5951dfbd5e Filter: any lvalue can get its methods called 2023-09-12 15:27:46 +02:00
Alexander Zubkov
9d8e4b01bc Doc: Document bytestring type 2023-08-24 18:04:33 +02:00
Alexander Zubkov
cbb43d6ff3 Doc: Document RAdv "custom option" configuration definition 2023-08-24 17:41:51 +02:00
Ondrej Zajicek
9bf2048476 BGP: Update RFC reference
RFC 5549 was obsoleted by RFC 8950.
2023-08-22 14:20:59 +02:00
Alexander Zubkov
ecbae010bf Fixed a typo in documentation
The problem was the "/" symbol in the prefix mask that finished the formatting definition prematurely.
2023-06-30 13:17:05 +02:00
Toke Høiland-Jørgensen
f08abcb8dd Babel: Add support for the RTT extension
This adds support to the Babel protocol for the RTT extension specified
in draft-ietf-babel-rtt-extension. While this extension is not yet at the
RFC stage, it is one of the more useful extensions to Babel[0], so it
seems worth having in Bird as well.

The extension adds timestamps to Hello and IHU TLVs and uses these to
compute an RTT to each neighbour. An extra per-neighbour cost is then
computed from the RTT based on a minimum and maximum interval and cost
value specified in the configuration. The primary use case for this is
improving routing in a geographically distributed tunnel-based overlay
network.

The implementation follows the babeld implementation when picking
constants and default configuration values. It also uses the same RTT
smoothing algorithm as babeld, and follows it in adding a new 'tunnel'
interface type which enables RTT by default.

[0] https://alioth-lists.debian.net/pipermail/babel-users/2022-April/003932.html
2023-06-02 00:31:53 +02:00
Ondrej Zajicek
f3b599afe5 BMP: Add some basic documentation 2023-04-21 04:42:13 +02:00
Trisha Biswas
9e44ace392 BGP: Add 'allow bgp_med' option for EBGP sessions
This option allows to treat bgp_med as regular transitive attribute
on EBGP sessions (without hacks in filters).

Minor changes from committer.
2023-04-14 04:28:37 +02:00
Johannes Moos
231c63851e Add missing references to "show route in" in the cli-help and doc.
The feature of showing all prefixes inside the given one has been added
in v2.0.9 but not well documented. Fixing it by this update.

Text in doc and commit message added by commiter.
2023-03-18 15:36:05 +01:00
Ondrej Zajicek
913ec57f27 BGP: Update RFC references 2023-02-19 15:42:18 +01:00
Ondrej Zajicek
501256cfc8 Babel: Update RFC references 2023-02-19 15:34:43 +01:00
Andreas Rammhold
eecc3f02e4 Babel: Implement IPv4 via IPv6 extension (RFC 9229)
The patch implements an IPv4 via IPv6 extension (RFC 9229) to the Babel
routing protocol (RFC 8966) that allows annoncing routes to an IPv4
prefix with an IPv6 next hop, which makes it possible for IPv4 traffic
to flow through interfaces that have not been assigned an IPv4 address.

The implementation is compatible with the current Babeld version.

Thanks to Toke Høiland-Jørgensen for early review on this work.

Minor changes from committer.
2023-02-14 16:17:03 +01:00
Maria Matejka
0851fcde65 Documentation: Adding roadmap as decided in January 2023 2023-02-03 09:12:34 +01:00
Radu Carpa
7144c9ca46 Filter: Allow setting the 'onlink' route attribute in filters
Add static route attribute to set onlink flag for route next hop. Can be
used to build a dynamically routed IP-in-IP overlay network. Usage:

     ifname = "tunl0";
     onlink = true;
     gw = bgp_next_hop;
2023-01-17 18:13:37 +01:00
Ondrej Zajicek
e48f898fda Doc: Document issue with import tables
The import table does not work reliably together with re-evaluation of
routes due to recursive next hops or flowspec validation. We will at
least document that here, as import tables are completely redesigned and
this issue is fixed in BIRD 3.x branch.
2022-12-09 22:43:27 +01:00
Ondrej Zajicek
3859e4efc1 BGP: Improve handling of hold and keepalive timers
The effective keepalive time now scales relative to the negotiated
hold time, to maintain proportion between the keepalive time and the
hold time. This avoids issues when both keepalive and hold times
were configured, the hold time was negotiated to a smaller value,
but the keepalive time stayed the same.

Add new options 'min hold time' and 'min keepalive time', which reject
session attempts with too small hold time.

Improve validation of config options an their documentation.

Thanks to Alexander Zubkov and Sergei Goriunov for suggestions.
2022-12-09 05:53:24 +01:00
Ondrej Zajicek
371eb49043 Conf: Free stored old config before parsing new one
BIRD keeps a previous (old) configuration for the purpose of undo. The
existing code frees it after a new configuration is successfully parsed
during reconfiguration. That causes memory usage spikes as there are
temporarily three configurations (old, current, and new). The patch
changes it to free the old one before parsing the new one (as user
already requested a new config). The disadvantage is that undo is
not available after failed reconfiguration.
2022-11-09 21:54:45 +01:00
Alexander Zubkov
5aebce5e0c Doc: Add documentation for "show route (import|export) table" 2022-10-18 04:25:29 +02:00
Ondrej Zajicek
8f79e6b93e BGP: Add option 'next hop prefer global'
Add BGP channel option 'next hop prefer global' that modifies BGP
recursive next hop resolution to use global next hop IPv6 address instead
of link-local next hop IPv6 address for immediate next hop of received
routes.
2022-10-10 05:06:19 +02:00
Ondrej Zajicek
2e484f8d29 Merge branch 'master' into backport 2022-07-24 20:08:02 +02:00
Ondrej Zajicek
971721c9b5 BGP: Minor improvements to BGP roles
Add support for bgp_otc in filters and warning for configuration
inside confederations.
2022-07-12 15:03:17 +02:00
Eugene Bogomazov
c73b5d2d3d BGP: Implement BGP roles
Implement BGP roles as described in RFC 9234. It is  a mechanism for
route leak prevention and automatic route filtering based on common BGP
topology relationships. It defines role capability (controlled by 'local
role' option) and OTC route attribute, which is used for automatic route
filtering and leak detection.

Minor changes done by commiter.
2022-07-11 17:25:54 +02:00
Maria Matejka
2e5bfeb73a Merge remote-tracking branch 'origin/master' into backport 2022-07-11 11:08:10 +02:00
Maria Matejka
7e9cede1fd Merge version 2.0.10 into backport 2022-07-10 14:19:24 +02:00
Ondrej Zajicek (work)
cb339a3067 Filter: Implement for loops
For loops allow to iterate over elements in compound data like BGP paths
or community lists. The syntax is:

  for [ <type> ] <variable> in <expr> do <command-body>
2022-06-27 21:13:32 +02:00
Ondrej Zajicek (work)
1ac8e11bba Filter: Implement mixed declarations of local variables
Allow variable declarations mixed with code, also in nested blocks with
proper scoping, and with variable initializers. E.g:

function fn(int a)
{
  int b;
  int c = 10;

  if a > 20 then
  {
    b = 30;
    int d = c * 2;
    print a, b, c, d;
  }

  string s = "Hello";
}
2022-06-27 21:13:32 +02:00
Ondrej Zajicek
a8a3d95be5 Nest: Improve GC strategy for rtables
Use timer (configurable as 'gc period') to schedule routing table
GC/pruning to ensure that prune is done on time but not too often.

Randomize GC timers to avoid concentration of GC events from different
tables in one loop cycle.

Fix a bug that caused minimum inter-GC interval be 5 us instead of 5 s.

Make default 'gc period' adaptive based on number of routing tables,
from 10 s for small setups to 600 s for large ones.

In marge multi-table RS setup, the patch improved time of flushing
a downed peer from 20-30 min to <2 min and removed 40s latencies.
2022-06-04 17:34:57 +02:00
Maria Matejka
652be92a21 Merge remote-tracking branch 'origin/master' into haugesund-to-2.0 2022-05-30 15:20:21 +02:00
Maria Matejka
097f157182 Merge commit '692055e3df6cc9f0d428d3b0dd8cdd8e825eb6f4' into haugesund-to-2.0 2022-05-30 15:17:52 +02:00
Vincent Bernat
207ac48533 Doc: fix mating -> matching in flowspec section 2022-04-22 17:06:27 +02:00