Commit graph

457 commits

Author SHA1 Message Date
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
Ondrej Zajicek (work)
692055e3df BFD: Add 'strict bind' option
Add BFD protocol option 'strict bind' to use separate listening socket
for each BFD interface bound to its address instead of using shared
listening sockets.
2022-04-07 19:33:40 +02:00
Maria Matejka
24773af9e0 Merge commit 'e42eedb9' into haugesund 2022-03-09 11:02:55 +01:00
Ondrej Filip
9b13fa4d9c Small changes related to the new release 2022-02-20 14:28:06 +01:00
Ondrej Zajicek (work)
53a2540687 Merge branch 'oz-trie-table' 2022-02-06 23:42:10 +01:00
Ondrej Zajicek (work)
d0f9a77f64 Doc: Describe routing table options 2022-02-06 23:27:13 +01:00
Ondrej Zajicek (work)
1f2eb2aca8 BGP: Implement flowspec validation procedure
Implement flowspec validation procedure as described in RFC 8955 sec. 6
and RFC 9117. The Validation procedure enforces that only routers in the
forwarding path for a network can originate flowspec rules for that
network.

The patch adds new mechanism for tracking inter-table dependencies, which
is necessary as the flowspec validation depends on IP routes, and flowspec
rules must be revalidated when best IP routes change.

The validation procedure is disabled by default and requires that
relevant IP table uses trie, as it uses interval queries for subnets.
2022-02-06 23:27:13 +01:00
Ondrej Zajicek (work)
81ee6cda2e Netlink: Add option to specify netlink socket receive buffer size
Add option 'netlink rx buffer' to specify netlink socket receive buffer
size. Uses SO_RCVBUFFORCE, so it can override rmem_max limit.

Thanks to Trisha Biswas and Michal for the original patches.
2022-01-17 05:11:29 +01:00
Ondrej Zajicek (work)
60e9def9ef BGP: Add option 'free bind'
The BGP 'free bind' option applies the IP_FREEBIND/IPV6_FREEBIND
socket option for the BGP listening socket.

Thanks to Alexander Zubkov for the idea.
2022-01-09 02:44:32 +01:00
Alexander Zubkov
77042292ff Doc: Document min/max operators for lists 2021-12-28 04:09:36 +01:00
Alexander Zubkov
e15e465720 Doc: Document community components access operators 2021-12-28 04:07:09 +01:00
Simon Ruderich
00410fd6c1 Doc: bgp: remove "advertise ipv4"
The option was removed in d15b0b0a ("BGP redesign", 2016-12-07)
but the documentation wasn't updated.
2021-12-18 03:17:48 +01:00
Maria Matejka
3660f19dd5 Dropping the RTS_DUMMY temporary route storage.
Kernel route sync is done by other ways now and this code is not used
currently.
2021-10-13 19:09:04 +02:00
Maria Matejka
6cd3771378 Multipage allocation
We can also quite simply allocate bigger blocks. Anyway, we need these
blocks to be aligned to their size which needs one mmap() two times
bigger and then two munmap()s returning the unaligned parts.

The user can specify -B <N> on startup when <N> is the exponent of 2,
setting the block size to 2^N. On most systems, N is 12, anyway if you
know that your configuration is going to eat gigabytes of RAM, you are
almost forced to raise your block size as you may easily get into memory
fragmentation issues or you have to raise your maximum mapping count,
e.g. "sysctl vm.max_map_count=(number)".
2021-10-13 19:01:22 +02:00
Ondrej Zajicek (work)
596f2e32e3 Nest: Allow both 'password' and 'key' keywords for authentication keys 2021-06-09 19:54:01 +02:00
Ondrej Zajicek (work)
b174cc0abc Babel: Add MAC authentication support - update
Some cleanups and bugfixes to the previous patch, including:

 - Fix rate limiting in index mismatch check

 - Fix missing BABEL_AUTH_INDEX_LEN in auth_tx_overhead computation

 - Fix missing auth_tx_overhead recalculation during reconfiguration

 - Fix pseudoheader construction in babel_auth_sign() (sport vs fport)

 - Fix typecasts for ptrdiffs in log messages

 - Make auth log messages similar to corresponding RIP/OSPF ones

 - Change auth log messages for events that happen during regular
   operation to debug messages

 - Switch meaning of babel_auth_check*() functions for consistency
   with corresponding RIP/OSPF ones

 - Remove requirement for min/max key length, only those required by
   given MAC code are enforced
2021-06-06 16:28:18 +02:00
Toke Høiland-Jørgensen
b218a28f61 Babel: Add MAC authentication support
This implements support for MAC authentication in the Babel protocol, as
specified by RFC 8967. The implementation seeks to follow the RFC as close
as possible, with the only deliberate deviation being the addition of
support for all the HMAC algorithms already supported by Bird, as well as
the Blake2b variant of the Blake algorithm.

For description of applicability, assumptions and security properties,
see RFC 8967 sections 1.1 and 1.2.
2021-06-06 16:28:18 +02:00
Toke Høiland-Jørgensen
35f88b305a Nest: Allow specifying security keys as hex bytes as well as strings
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.
2021-06-06 16:28:18 +02:00
Toke Høiland-Jørgensen
725d9af94a Lib: Add Blake2s and Blake2b hash functions
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.
2021-06-06 16:26:58 +02:00
Ondrej Zajicek (work)
c3c691e95c Flowspec: Documentation update 2021-05-18 20:41:01 +02:00
Ondrej Zajicek (work)
dd8481cc1c Flowspec: Do not use comma for bitmask operators
For numeric operators, comma is used for disjunction in expressions like
"10, 20, 30..40". But for bitmask operators, comma is used for
conjunction in a way that does not really make much sense. Use always
explicit logical operators (&& and ||) to connect bitmask operators.

Thanks to Matt Corallo for the bugreport.
2021-05-18 19:54:18 +02:00
Trisha Biswas
e5468d1685 Filter: Add MPLS label route attribute
Add support to set or read outgoing MPLS labels using filters. Currently
this supports the addition of one label per route for the first next hop.

Minor changes by committer.
2021-05-17 17:50:04 +02:00
Ondrej Zajicek (work)
5caf32efa2 Doc: Fix flowspec example
Thanks to Matt Corallo for the bugreport.
2021-04-03 20:09:32 +02:00
Ondrej Zajicek (work)
0d1a11cca3 Doc: Document automatic RPKI reload 2021-03-15 17:51:33 +01:00
Ondrej Zajicek (work)
6489a2450e Doc: Document channel debug options 2021-03-15 16:16:32 +01:00
Vincent Bernat
714238716e BGP: Add support for BGP hostname capability
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.
2021-02-10 16:53:57 +01:00
Ondrej Zajicek (work)
a141959f07 Doc: Describe per-nexthop static route options
Also remove description of (no longer supported) per-route 'bfd' option,
and add examples of IPv6 routes with link-local nexthops.
2021-01-07 01:20:56 +01:00
Ondrej Zajicek (work)
4155104c90 BGP: Deprecate 'missing lladdr' option
The option is not implemented since transition to 2.0 and no plan to add it.
Also remove some deprecated RTS_* valus from documentation.

Thanks to Sébastien Parisot for notification.
2021-01-06 14:44:23 +01:00
Ondrej Zajicek (work)
8cc5bb09e3 Filter: Add 'weight' route attribute
Add 'weight' route attribute that allows to get and set ECMP weight of
nexthops. Similar to 'gw' attribute, it is limited to the first nexthop,
but it is useful for handling BGP multipath, where an ECMP route is
merged from multiple regular routes.
2020-12-02 05:02:26 +01:00
Ondrej Zajicek (work)
3347aaafec Static: Support for multiple routes with the same network
Add support for proper handling of multiple routes with the same network
to the static protocol. Routes are distinguished by internal index, which
is assigned automatically (sequentially for routes within each network).
Having different route preference or igp_metric attribute is optional.
2020-11-19 16:38:39 +01:00
Nigel Kukard
df65d519d6 Doc: Added example of static routes with BGP large communities 2020-11-18 18:00:12 +01:00
Ondrej Zajicek (work)
4a42e7e925 BFD: Update documentation about per-session options 2020-11-12 04:50:45 +01:00
Ondrej Zajicek (work)
fc1e3211b1 RPKI: Add 'ignore max length' option
Add 'ignore max length' option to RPKI protocol, which ignores received
max length in ROA records and instead uses max value (32 or 128). This
may be useful for implementing loose RPKI check for blackholes.
2020-10-11 01:00:54 +02:00
Ondrej Zajicek (work)
6c11dbcf28 Doc: Fix missing semicolons
Thanks to Marco Gartmann for the bugreport.
2020-10-05 14:52:55 +02:00
Ondrej Zajicek (work)
14ce8904e7 Doc: Fix typo
Thanks to Sergey Kulikov for the bugreport.
2020-10-05 14:45:01 +02:00
Kenth Eriksson
71e08edd94 Doc: Add 'ptp address' to OSPF doc overview 2020-06-03 23:05:29 +02:00