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161 commits

Author SHA1 Message Date
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)
9f2670277c OSPF: Fix bad initialization of tx_hdrlen field
Function ifa_tx_hdrlen() uses fields autype and passwords, so it must be
called after these are set.

Thanks to Kenth Eriksson for the bugreport.
2020-01-09 03:02:15 +01:00
Ondrej Zajicek (work)
fa1e0ba354 OSPF: Update DR when local priority changes
When priority is reconfigured locally, we need to trigger DR election.
2019-07-04 13:34:42 +02:00
Ondrej Zajicek (work)
1a2ad348f6 OSPF: Support for graceful restart
Implement OSPFv2 (RFC 3623) and OSPFv3 (RFC 5187) graceful restart,
for both restarting and helper sides. Graceful restart is initiated
by 'graceful down' command.
2019-06-30 21:30:41 +02:00
Ondrej Zajicek (work)
baeacdcfd3 OSPF: Fix reconfiguration of vlinks
Fix crash during reconfiguration of OSPF config with vlinks. When vlink
is reconfigured, a generic iface-reconfiguration code is used, which in
one place supposes that it is running on a regular iface.

Thanks to Cybertinus for a bugreport.
2018-12-10 02:15:06 +01:00
Ondrej Zajicek (work)
0ac9cb2c1f OSPF: Fix some trace messages
Missing argument in MTU change trace message can crash bird when MTU
change happens and trace messages are active.

Thanks to Alexander Velkov for the bugreport.
2018-10-25 17:22:37 +02:00
Ondrej Zajicek (work)
4727d1db9d OSPF: Support of authentication trailer for OSPFv3
Implement RFC 7166, crypthographic authentication for OSPFv3
analogous to authentication used for OSPFv2.
2018-04-25 15:54:53 +02:00
Ondrej Zajicek (work)
46434a3cad Merge commit '7b2c5f3d2826e3175bf31b1c36056c9efc587a2b' into int-new 2017-12-07 18:35:46 +01:00
Ondrej Zajicek (work)
a6f79ca57f Timers: Revert temporary names and remove old timer.h 2017-12-07 13:54:59 +01:00
Ondrej Zajicek (work)
b32d557a6e OSPF: Update to new timers
Note that recurrent timers are currently limited to ~1 hour.
2017-12-07 13:53:42 +01:00
Ondrej Zajicek (work)
025525266f Timers: Replace old timers with microsecond timers
The old timer interface is still kept, but implemented by new timers. The
plan is to switch from the old inteface to the new interface, then clean
it up.
2017-12-07 13:49:27 +01:00
Ondrej Zajicek (work)
d3f4f92b0e OSPF: Support of address families in OSPFv3
OSPFv3-AF can handle multiple topologies of diferent address families
(IPv4, IPv6, both unicast and multicast) using separate instances
distinguished by instance ID ranges.
2017-10-10 16:10:02 +02:00
Ondrej Zajicek (work)
943478b00f Basic VRF support
Add basic VRF (virtual routing and forwarding) support. Protocols can be
associated with VRFs, such protocols will be restricted to interfaces
assigned to the VRF (as reported by Linux kernel) and will use sockets
bound to the VRF. E.g., different multihop BGP instances can use diffent
kernel routing tables to handle BGP TCP connections.

The VRF support is preliminary, currently there are several limitations:

- Recent Linux kernels (4.11) do not handle correctly sockets bound
to interaces that are part of VRF, so most protocols other than multihop
BGP do not work. This will be fixed by future kernel versions.

- Neighbor cache ignores VRFs. Breaks config with the same prefix on
local interfaces in different VRFs. Not much problem as single hop
protocols do not work anyways.

- Olock code ignores VRFs. Breaks config with multiple BGP peers with the
same IP address in different VRFs.

- Incoming BGP connections are not dispatched according to VRFs.
Breaks config with multiple BGP peers with the same IP address in
different VRFs. Perhaps we would need some kernel API to read VRF of
incoming connection? Or probably use multiple listening sockets in
int-new branch.

- We should handle master VRF interface up/down events and perhaps
disable associated protocols when VRF goes down. Or at least disable
associated interfaces.

- Also we should check if the master iface is really VRF iface and
not some other kind of master iface.

- BFD session request dispatch should be aware of VRFs.

- Perhaps kernel protocol should read default kernel table ID from VRF
iface so it is not necessary to configure it.

- Perhaps we should have per-VRF default table.
2017-09-06 17:38:48 +02:00
Ondrej Zajicek (work)
8860e991f6 Merge branch 'master' into int-new 2016-11-08 19:27:58 +01:00
Ondrej Zajicek (work)
29239ba2bb OSPF: Use message authentication interface
Based on former commit from Pavel Tvrdik
2016-11-02 17:53:22 +01:00
Ondrej Zajicek (work)
08b3a24da5 IO: Minor changes in socket AF handing
AF can be specified implicitly by saddr or daddr, flags SKF_V4ONLY and
SKF_V6ONLY are to be removed.
2016-05-17 15:21:49 +02:00
Jan Moskyto Matejka
7a7ac65682 Merge branch 'master' into int-new-channels 2016-04-08 12:28:33 +02:00
Ondrej Zajicek (work)
e3f506f9b5 OSPF: Multicast ability is irrelevant for stub interfaces 2016-02-25 18:23:39 +01:00
Jan Moskyto Matejka
6ffa8f5393 Hidden AF_INET* inside sysdep/ 2016-01-11 09:29:51 +01:00
Ondrej Zajicek (work)
04632fd77f Follow-up work on integration 2015-12-24 15:56:04 +01:00
Ondrej Zajicek (work)
0bf95f99e6 Follow-up work on integration
Contains some patches from Jan Moskyto Matejka
2015-12-21 17:17:21 +01:00
Jan Moskyto Matejka
d7661fbe9d Removed BITS_PER_IP_ADDRESS, MAX_PREFIX_LENGTH, BIRD_AF
Explicit setting of AF_INET(6|) in IP socket creation. BFD set to listen
on v6, without setting the V6ONLY flag to catch both v4 and v6 traffic.

Squashing and minor changes by Ondrej Santiago Zajicek
2015-12-19 15:57:09 +01:00
Ondrej Zajicek (work)
d44e686e9b Follow-up commit on integrated BIRD
Use net_addr for interface address prefixes, support net_addr in
configuration parser.
2015-11-12 02:03:59 +01:00
Ondrej Zajicek (work)
fe9f1a6ded Initial commit on integrated BIRD
New data types net_addr and variants (in lib/net.h) describing
network addresses (prefix/pxlen). Modifications of FIB structures
to handle these data types and changing everything to use these
data types instead of prefix/pxlen pairs where possible.

The commit is WiP, some protocols are not yet updated (BGP, Kernel),
and the code contains some temporary scaffolding.

Comments are welcome.
2015-11-05 12:48:52 +01:00
Ondrej Zajicek
b5e76398de OSPF: Fixes some issues with link detection
Thanks to Bernardo Figueiredo and Israel G. Lugo for the bugreport.
2015-08-19 11:16:23 +02:00
Ondrej Filip
398f922531 Typo fix by Hans van Kranenburg 2015-06-01 10:41:17 +02:00
Ondrej Zajicek
ac9dc669d8 Bugfix in latest OSPF changes. 2014-11-03 20:35:25 +01:00
Ondrej Zajicek
cd3b700393 Bugfix to OSPF reconfiguration. 2014-11-03 14:53:59 +01:00
Ondrej Zajicek
6f8bbaa10b Fininshing integrated OSPF. 2014-11-03 10:42:55 +01:00
Ondrej Zajicek
f8fefde318 Refactoring of OSPF messages. 2014-10-24 11:07:38 +02:00
Ondrej Zajicek
742029eb78 Whitespace cleanup in OSPF. 2014-07-19 17:28:38 +02:00
Ondrej Zajicek
a7a7372aa7 Temporary integrated OSPF commit. 2014-07-18 18:24:12 +02:00
Ondrej Zajicek
70945cb645 Temporary integrated OSPF commit. 2014-06-26 11:58:57 +02:00
Ondrej Zajicek
05476c4d04 IPv4/IPv6 integrated socket code. 2014-05-18 11:42:26 +02:00
Ondrej Zajicek
48e5f32db6 Many changes in I/O and OSPF sockets and packet handling.
I/O:
 - BSD: specify src addr on IP sockets by IP_HDRINCL
 - BSD: specify src addr on UDP sockets by IP_SENDSRCADDR
 - Linux: specify src addr on IP/UDP sockets by IP_PKTINFO
 - IPv6: specify src addr on IP/UDP sockets by IPV6_PKTINFO
 - Alternative SKF_BIND flag for binding to IP address
 - Allows IP/UDP sockets without tx_hook, on these
   sockets a packet is discarded when TX queue is full
 - Use consistently SOL_ for socket layer values.

OSPF:
 - Packet src addr is always explicitly set
 - Support for secondary addresses in BSD
 - Dynamic RX/TX buffers
 - Fixes some minor buffer overruns
 - Interface option 'tx length'
 - Names for vlink pseudoifaces (vlinkX)
 - Vlinks use separate socket for TX
 - Vlinks do not use fixed associated iface
 - Fixes TTL for direct unicast packets
 - Fixes DONTROUTE for OSPF sockets
 - Use ifa->ifname instead of ifa->iface->name
2014-02-06 17:46:01 +01:00
Ondrej Zajicek
c72aca41e5 OSPF ifaces on loopback should be stub. 2013-11-24 22:12:51 +01:00
Ondrej Zajicek
1ec522538f BFD protocol, ready for release.
Supports OSPF and BGP and also statically configured sessions.
2013-11-19 22:33:48 +01:00
Ondrej Zajicek
354496ace8 Some fixes for TTL security. 2013-07-11 13:50:44 +02:00
Ondrej Zajicek
70e212f913 Implements TTL security for OSPF and RIP.
Interfaces for OSPF and RIP could be configured to use (and request)
TTL 255 for traffic to direct neighbors.

Thanks to Simon Dickhoven for the original patch for RIPng.
2013-06-25 15:39:44 +02:00
Ondrej Zajicek
ef4a50be10 Better packet priority and traffic class handling.
Implements support for IPv6 traffic class, sets higher priority for OSPF
and RIP outgoing packets by default and allows to configure ToS/DS/TClass
IP header field and the local priority of outgoing packets.
2013-06-24 16:37:30 +02:00
Ondrej Zajicek
924868543c Fixes crash with vlinks. 2013-05-28 10:48:14 +02:00
Ondrej Zajicek
8df02847e8 Fixes a compatibility issue in OSPFv2 PtP links.
BIRD used zero netmask in hello packets on all PtP links, not just on
unnumbered ones. This patch fixes it and adds option 'ptp netmask'
for overriding the default behavior.

Thanks to Alexander V. Chernikov for the original patch.
2013-04-17 13:06:40 +02:00
Ondrej Zajicek
9ff5257357 Better handling of global addresses as configured NBMA neighbors in OSPFv3.
Configured NBMA neighbors in OSPFv3 should be link-local addresses, old
behavior was to silently ignore global ones. The patch allows BIRD to
accept global ones, but adds a warning and a documentation notice.

Thanks to Wilco Baan Hofman for the bugreport.
2013-04-16 16:22:31 +02:00
Ondrej Zajicek
227af52fb5 Fixes OSPF reconfigure w.r.t. downed ifaces. 2012-11-10 16:18:12 +01:00
Ondrej Zajicek
dd4da6f640 Fixes another bug in OSPFv3 vlinks. 2012-10-31 17:14:35 +01:00
Ondrej Zajicek
95127cbbb7 Real broadcast mode for OSPFv2. 2012-05-14 11:47:41 +02:00
Ondrej Zajicek
fd087589f8 Fixes broken vlinks in OSPF. 2012-03-16 13:01:12 +01:00
Ondrej Zajicek
2f9955b5d5 Fixes TTL for multicast OSPF packets.
Thanks Alexander V. Chernikov for the suggestion.
2012-03-15 13:12:00 +01:00
Ondrej Zajicek
beeda6af44 Removes timers for stub interfaces. Also fixes some minor bugs. 2011-07-08 01:14:52 +02:00
Ondrej Zajicek
7d4e923603 Do not open sockets for stub interfaces. 2011-07-06 03:10:02 +02:00