Commit graph

1521 commits

Author SHA1 Message Date
Ondrej Zajicek (work)
c1511b92cc Babel: Log the reason when refusing to run on an interface
The babel protocol code checks whether iface supports multicast, and
whether it has a link-local address assigned. However, it doesn not give
any feedback if any of those checks fail, it just silently ignores the
interface. Fix this by explicitly logging when multicast check fails.

Based on patch from Toke Høiland-Jørgensen, thanks!
2021-05-10 20:09:31 +02:00
Ondrej Zajicek (work)
2a0af925b8 OSPF: Allow ifaces with host address as unnumbered PtP or PtMP ifaces
Ifaces with host address (/32) were forced to be stubby, but now they
can be used as PtP or PtMP. For these ifaces we need to:

 - Do not force stub mode
 - Accept packets from any IP as local
 - Accept any configured neighbor as local
 - Detect ifaces properly as unnumbered
 - Use ONLINK flag for nexthops
2021-05-10 13:39:55 +02:00
Ondrej Zajicek (work)
bc591061f6 OSPF: Packets on PtP networks should be always sent to AllSPFRouters
As specified in RFC 2328 8.1: "On physical point-to-point networks,
the IP destination is always set to the address AllSPFRouters."

Note that this likely break setups with multiple neighbors on a network
configured as PtP, which worked before. These should be configured as
PtMP.

Thanks to Senthil Kumar Nagappan for the original patch and to Joakim
Tjernlund for suggestions.
2021-05-09 15:26:13 +02:00
Ondrej Zajicek (work)
1647923bd8 OSPF: Minor refactoring of packet sending code
Common behavior for LSupd and delayed LSack moved to ospf_send_to_iface()
and other minor changes.
2021-05-09 14:51:39 +02:00
Maria Matejka
4635314cef Routing tables list iteration should use explicit node struct position 2021-03-30 21:56:08 +02:00
Ondrej Zajicek (work)
7a74ad5a61 BGP: Do not keep BAF_EXT_LEN flag internally
The flag makes sense just in external representation. It is reset during
BGP export, but keeping it internally broke MRT dumps for short attributes
that used it anyways.

Thanks to Simon Marsh for the bugreport and the patch.
2021-03-30 16:59:11 +02:00
Ondrej Zajicek (work)
5a6e8380f8 BGP: Do not show statistics
BGP statistics code was preliminary and i wanted to replace it by
separate 'show X stats' command. The patch hides the preliminary
output in 'show protocols all' so it is not part of the released
version.
2021-03-18 15:44:04 +01:00
Ondrej Zajicek (work)
454ae30445 RPKI: Improve error handling of DNS resolver 2021-03-17 17:24:00 +01:00
Ondrej Zajicek (work)
0a3db4c680 Minor fixes for restricted builds 2021-03-17 15:56:12 +01:00
Ondrej Zajicek (work)
2f98153490 Pipe: Propagate debug flags from protocol to channels
Pipe channels are kind-of implicit, so setting protocol debug flags
should also set pipe debug flags.
2021-03-16 20:10:00 +01:00
Ondrej Zajicek (work)
ae9ae864d3 OSPFv3: Update neighbor authentication state from Hello packets
In OSPFv3, only Hello and DBDes packets contain flags specifying whether
RFC 7166 authentication trailer is used. Other packets are processed
based on stored authentication state in neighbor structure. Update this
state with each received Hello to handle authentication change from
reconfigurations.

Thanks to Joakim Tjernlund and Kenth Eriksson for the bugreport.
2021-03-16 16:34:42 +01:00
Ondrej Zajicek (work)
9cf3d53311 Static: Implement reload hook 2021-03-10 15:07:19 +01:00
Ondrej Zajicek (work)
d3782c72b9 Nest: Add option to control automatic RPKI reload
Also, no automatic reload for BGP channels without import/export table.
2021-02-12 05:05:18 +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)
5d414309ec MRT: Fix MP-BGP next hops
Flag signalling that MP-BGP mode should be used got reset after first
batch of routes, so remaining routes were processed without that, leading
to missing MP_REACH_NLRI attribute.

Thanks to Piotr Wydrych for the bugreport.
2021-01-22 04:34:15 +01:00
Ondrej Zajicek (work)
d774f6d721 MRT: Fix IPv6 table dumps
Add fake MP_REACH_NLRI attribute with BGP next hop when encoding MRT
table dumps for IPv6 routes. That is necessary to encode next hop as
NEXT_HOP attribute is not used for MP-BGP.

Thanks to Santiago Aggio for the bugreport.
2021-01-12 15:37:01 +01:00
Ondrej Zajicek (work)
910adaa08b BFD: Dispatch sessions also by interface index
Direct BFD sessions needs to be dispatched not only by IP addresses, but
also by interfaces, in order to avoid collisions between neighbors with
the same IPv6 link-local addresses.

Extend BFD session hash_ip key by interface index to handle that. Use 0
for multihop sessions.

Thanks to Sebastian Hahn for the original patch.
2021-01-10 15:29:02 +01:00
Ondrej Zajicek (work)
17663b6a7c RPKI: Remove port (and SSH username) from 'Cache server' output line
It was mixed-up if hostname is IPv6 address, and reporting separate
values (like port) on separate lines fits better into key-value style
of 'show protocols all' output. Also, the patch simplifies transport
identification formatting (although it is unused now).

Thanks to Alarig Le Lay for the suggestion.
2021-01-07 06:04:31 +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)
ea3c6c1a15 Static: Fix handling of 'net' attribute in per-route filters
We need to define 'net' field temporarily as it may be accessed by
per-route filters.

Thanks to Damian Zaremba for the bugreport.
2020-12-28 21:19:27 +01:00
Ondrej Zajicek (work)
61dae32b29 Nest: Per-channel debug flags
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.
2020-12-07 22:19:40 +01:00
Ondrej Zajicek (work)
2465867712 BGP: Zero the newly allocated bucket structure
This fixes an issue with dirty node passed to add_tail().

Thanks to Andreas Rammhold for the initial patch.
2020-11-25 15:48:22 +01:00
Ondrej Zajicek (work)
1678bc0746 Fix some failed asserts due to add_tail()
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.
2020-11-24 03:42:23 +01:00
Ondrej Zajicek (work)
c9ae81656f Some minor sl_allocz() cleanups 2020-11-24 03:21:44 +01:00
Toke Høiland-Jørgensen
db2d29073a lib/slab: introduce sl_allocz() function and use it in Babel
The babel protocol code was initialising objects returned from the slab
allocator by assigning to each of the struct members individually, but
wasn't touching the NODE member while doing so. This leads to warnings on
debug builds since commit:

baac700906 ("List expensive check.")

To fix this, introduce an sl_allocz() variant of the slab allocator which
will zero out the memory before returning it, and switch all the babel call
sites to use this version. The overhead for doing this should be negligible
for small objects, and in the case of babel, the largest object being
allocated was being zeroed anyway, so we can drop the memset in
babel_read_tlv().
2020-11-24 02:36:31 +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
Ondrej Zajicek (work)
00ddd18b02 OSPFv3: Fix intra-area-prefix-LSA origination on DR
When a new link-LSA is originated, we need to notify intra-area-prefix-LSA
handling, like when a new link-LSA is received. Otherwise a new network
prefix added to a DR is not propagated immediately.

Thanks to Bala Sajja for the bugreport.
2020-11-18 17:37:29 +01:00
Ondrej Zajicek (work)
3b56bf8849 BFD: Better handling of BFD options in BGP configs
Merge multiple BFD option blocks in BGP configs instead of using the last
one. That is necessary for proper handling of templates when BFD options
are used both in a BGP template and in a BGP protocol derived from that
template.
2020-11-12 04:02:38 +01:00
Ondrej Zajicek (work)
99ad208dd7 BFD: Fix superfluous reconfiguration of sessions 2020-11-12 02:48:35 +01:00
Ondrej Zajicek (work)
9d3fc3062b BFD: Allow per-request session options
BFD session options are configured per interface in BFD protocol. This
patch allows to specify them also per-request in protocols requesting
sessions (currently limited to BGP).
2020-11-08 15:33:22 +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
Maria Matejka
600eb695b1 OSPF: Fixed a debug assert 2020-08-31 15:41:39 +02:00
Ondrej Zajicek (work)
dc8d9dec4a OSPF: Skip out-of-state packets earlier
Sometimes multicast OSPF packet is received when neighbor adjacency is
not established. Such packet should be ignored earlier in packet
processing as otherwise it causes strange error messages when OSPFv3
authentication is enabled.
2020-08-12 19:42:44 +02:00
Ondrej Zajicek (work)
c26c6bc2d7 Show info from multiple protocols when protocol is not specified
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.
2020-06-28 15:38:47 +02:00
Ondrej Zajicek (work)
82937b465b OSPF: Fix bad header length test
Thanks to Slava Aseev for the thorough bugreport.
2020-06-10 13:27:14 +02:00
Kazuki Yamaguchi
19f8f17320 RPKI: Fix unnecessary reconnection on reconfiguration
Compare the new timing parameters with the old configuration, not with
the temporary state of the current connection.

The timing values in struct rpki_cache is updated by a version 1 End Of
Data PDU, unless this behavior is suppressed by the configuration
explicitly by the "keep" keyword. Consequently, every reconfiguration
of BIRD triggers a reconnection even if it is not necessary.
2020-06-03 15:05:35 +02:00
Maria Matejka
eee8af4db2 OSPF: setting list node to zero before enlisting 2020-06-02 16:58:06 +02:00
Ondrej Zajicek (work)
4e8f8afc68 Babel: Set onlink flag for IPv4 routes with unreachable next hop
If the next hop of a route is not a reachable address, the route should be
installed as onlink. This enables a configuration common in mesh networks
where the mesh interface is assigned a /32 and babel handles the routing by
installing onlink routes.

Thanks to Toke Hoiland-Jorgensen for the patch.
2020-05-26 23:43:13 +02:00
Ondrej Zajicek (work)
c1632ad0f3 OSPF: Fix handling of unnumbered PtPs
This issue has a long history. In 2012, we changed data field for
unnumbered PtP links from iface id (specified by RFC) to IP address based
on reports of bugs in Quagga that required it, and we used out-of-band
information to distinquish unnumberred PtPs with the same local IP
address.

Then with OSPF graceful restart implementation, we found that we can no
longer use out-of-band information, and we need to use only LSAdb info
for routing table calculation, but i forgot to finish handling of this
case, so multiple unnumbered PtPs with the same local IP addresses were
broken.

Considering that even recent Mikrotik RouterOS has broken next hop
calculation that depends on IP address in PtP link data field, we
cannot just switch back to the iface id for unnumbered PtP links.

The patch makes two changes: First, it goes back to use out-of-band
(position) info for distinguishing local interfaces in SPF when graceful
restart is not enabled, while still uses LSAdb-only approach for SPF
calculation when graceful restart is enabled.

Second, it adds OSPF interface option 'ptp address', which controls
whether IP address or iface id is used in data field. It is enabled
by default except for unnumbered PtP links with enabled graceful
restart.

Thanks to Kenth Eriksson for the bugreport and Joakim Tjernlund for
suggestions.
2020-05-26 18:21:43 +02:00
Ondrej Zajicek (work)
b729e731f9 RIP: Triggered RIP (demand circuit) documentation 2020-05-19 02:42:22 +02:00
Ondrej Zajicek (work)
5fc8407177 RIP: Fix handling of passive mode for demand circuit interfaces 2020-05-12 03:46:47 +02:00
Maria Matejka
048eb2ddf1 Merge remote-tracking branch 'origin/mq-static-analysis' 2020-05-01 15:34:17 +02:00
Maria Matejka
258be56539 Nest: Added const to ea_show just to declare that this shouldn't really change anything 2020-05-01 15:19:12 +02:00
Maria Matejka
a7d9b8f116 OSPF: Zero-initialization of a temporary neighbor 2020-05-01 15:19:12 +02:00
Maria Matejka
5f60d14ede RPKI: fixed rare va_list leak 2020-05-01 15:19:12 +02:00
Maria Matejka
9e64ac4b7c OSPF: Adding a note about a static analyzer result. 2020-05-01 15:19:12 +02:00
Maria Matejka
dccee40826 OSPF: variable-length array of size 0 replaced by alloca()'d pointer
NULL pointer is safer than a random pointer onto stack if this function
gets changed and eventually broken.
2020-05-01 15:19:12 +02:00
Ondrej Zajicek (work)
17de3a023f BGP: Fix handling of strange IPv6 link-local-only next hops
There are three common ways how to encode IPv6 link-local-only next hops:
(:: ll), (ll), and (ll ll). We use the first one but we should accept all
three. The patch fixes handling of the last one.

Thanks to Sebastian Hahn for the bugreport.
2020-04-29 02:50:29 +02:00
Maria Matejka
d607205486 Not calling memcpy with n=0. 2020-04-28 16:21:06 +02:00
Nasato Goto
a6548d5b5b BGP: Fix handling of 16bit-only ASN translation
The bug generated invalid AGGREGATOR attribute during translation of
32bit ASN to 16bit-only BGP peer. The patch fixes that.
2020-04-15 03:46:53 +02:00