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path: root/proto/bgp/bgp.c
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2017-09-19BGP: Shutdown communication (RFC 8203)Ondrej Zajicek (work)
The patch implements BGP Administrative Shutdown Communication (RFC 8203) allowing BGP operators to pass messages related to BGP session administrative shutdown/restart. It handles both transmit and receive of shutdown messages. Messages are logged and may be displayed by show protocol all command. Thanks to Job Snijders for the basic patch.
2017-09-12Nest: VRF support for neighbor cache and olock codeOndrej Zajicek (work)
Actually much simpler than expected.
2017-09-06Basic VRF supportOndrej Zajicek (work)
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.
2017-03-14BGP: Allow to specify interface for regular sessionsOndrej Zajicek (work)
This may be useful if multple interfaces share the same network range. Thanks to Fritz Grimpen for the original patch.
2016-11-25BGP: Fix memory leak in graceful restart codeOndrej Zajicek (work)
Prefix and bucket tables are initialized when entering established state but not explicitly freed when leaving it (that is handled by protocol restart). With graceful restart, BGP may enter and leave established state multiple times without hard protocol restart causing memory leak.
2016-11-01Build: switch on -Wextra, get rid of most of the warningsJan Moskyto Matejka
There are several unresolved -Wmissing-field-initializers on older versions of GCC than 5.1, all of them false positive.
2016-04-13BSD: Add the IPsec SA/SP database entries controlOndrej Zajicek (work)
Add code for manipulation with TCP-MD5 keys in the IPsec SA/SP database at FreeBSD systems. Now, BGP MD5 authentication (RFC 2385) keys are handled automatically on both Linux and FreeBSD. Based on patches from Pavel Tvrdik.
2016-04-06IO: Avoid multiple event cycles in one loop cycle.Ondrej Zajicek (work)
Event cycle may took too much time and trigger next timer events, so avoid cycling between timer and event cycles inside the loop cycle.
2016-04-06IO: Replace RX priority heuristic with explicit markOndrej Zajicek (work)
In BIRD, RX has lower priority than TX with the exception of RX from control socket. The patch replaces heuristic based on socket type with explicit mark and uses it for both control socket and BGP session waiting to be established. This should avoid an issue when during heavy load, outgoing connection could connect (TX event), send open, but then failed to receive OPEN / establish in time, not sending notifications between and therefore got hold timer expired error from the neighbor immediately after it finally established the connection.
2016-02-11BGP: Fix bug in incoming connection handlingOndrej Zajicek (work)
When a BGP session was established by an outgoing connection with Graceful Restart behavior negotiated, a pending incoming connection in OpenSent state, and another incoming connection was received, then the outgoing connection (and whole BGP session) was closed, but the old incoming connection was just overwritten by the new one. That later caused a crash when the hold timer from the old connection fired.
2015-07-18BGP: Extended messages supportOndrej Zajicek
Implements draft-ietf-idr-bgp-extended-messages-10, for now undocumented and with temporary private capability number.
2015-06-08BGP multipath supportOndrej Zajicek
Kernel option 'merge paths' allows to merge routes exported to kernel protocol (currently BGP and static routes) to multipath routes.
2015-03-29BGP: Enhanced route refresh (RFC 7313) supportOndrej Zajicek
Also hook feed_done is renamed to feed_end.
2015-02-22Rename BGP option 'start delay' to 'connect delay'Ondrej Zajicek
Also update log message for error-triggered startup delay.
2015-02-22Relax BGP neighbor parameterOndrej Zajicek
Permit specifying neighbor address, AS number and port independently. Add 'interface' parameter for specifying interface for link-local sessions independently. Thanks to Alexander V. Chernikov for the original patch.
2015-02-21Store protocol config size inside protocol structureOndrej Zajicek
Make proto_config_new() use this info instead of supplied size. Thanks to Alexander V. Chernikov for the patch.
2015-02-21Make BGP protocol instance search a separate functionOndrej Zajicek
Thanks to Alexander V. Chernikov for the patch.
2015-02-21Replacing GNU old-style field designator extensionPavel Tvrdik
2015-02-21Link state support in BGP.Ondrej Zajicek
Configurable fast shutdown of a BGP session when an interface loses link.
2014-10-24Integrated IP functions.Ondrej Zajicek
2014-10-02Allows to configure different remote port for BGP sessions.Ondrej Zajicek
Thanks to João Taveira Araújo for the original patch.
2014-05-18IPv4/IPv6 integrated socket code.Ondrej Zajicek
2014-03-24Fixes some minor issues in graceful restart.Ondrej Zajicek
2014-03-23Documentation (and minor fixes) for BGP graceful restart.Ondrej Zajicek
2014-03-20BGP graceful restart support.Ondrej Zajicek
Also significant core protocol state changes needed for that, global graceful restart recovery state and kernel proto support for recovery.
2014-02-06Merge branch 'add-path'Ondrej Zajicek
2013-12-10Merge branch 'add-path'Ondrej Zajicek
2013-12-02Fixes problem with source address selection in BGP and BFD.Ondrej Zajicek
2013-12-01Finishes add-path.Ondrej Zajicek
Fixes some bugs and uses generic hash implementation.
2013-11-25Merge branch 'master' into add-pathOndrej Zajicek
2013-11-24Enables multihop mode for IBGP by default.Ondrej Zajicek
This is more consistent with common usage and also with the behavior of other implementations (Cisco, Juniper). Also changes the default for gw mode to be based solely on direct/multihop.
2013-11-23Merge branch 'master' into add-pathOndrej Zajicek
Conflicts: filter/filter.c nest/proto.c nest/rt-table.c proto/bgp/bgp.h proto/bgp/config.Y
2013-11-22Minor fixes.Ondrej Zajicek
2013-11-19BFD protocol, ready for release.Ondrej Zajicek
Supports OSPF and BGP and also statically configured sessions.
2013-08-13Fixes a bug related to mixed up neighbor events in BGP.Ondrej Zajicek
Neighbor events related to received route next hops got mixed up with sticky neighbor node for an IP of the BGP peer. If a neighbor for a next hop disappears, BGP session is shut down.
2013-07-13Fixes stuck connection during BGP session shutdown.Ondrej Zajicek
If TX buffers were full during BGP session shutdown then a protocol waited indefinitely to be able to send notification packet to close the session.
2013-05-09Fixes a problem with BGP neighbors, link-local addresses and locking.Ondrej Zajicek
Thanks to Fritz Grimpen for the bugfix.
2013-01-10Separate import and receive limits.Ondrej Zajicek
They have different behavior w.r.t. filtered routes that are kept.
2012-12-27Implements interface masks for choosing router id.Ondrej Zajicek
Router ID could be automatically determined based of subset of ifaces/addresses specified by 'router id from' option. The patch also does some minor changes related to router ID reconfiguration. Thanks to Alexander V. Chernikov for most of the work.
2012-11-15Changes 'rejected' to 'filtered' in one of the last patches.Ondrej Zajicek
2012-11-10Allows rejected routes to be kept and examined.Ondrej Zajicek
When 'import keep rejected' protocol option is activated, routes rejected by the import filter are kept in the routing table, but they are hidden and not propagated to other protocols. It is possible to examine them using 'show route rejected'.
2012-08-14Implements ADD-PATH extension for BGP.Ondrej Zajicek
Allows to send and receive multiple routes for one network by one BGP session. Also contains necessary core changes to support this (routing tables accepting several routes for one network from one protocol). It needs some more cleanup before merging to the master branch.
2012-08-06Fixes BGP subcode during global shutdown.Ondrej Zajicek
2012-07-16Merge branch 'rt-accepted'Ondrej Zajicek
Conflicts: nest/config.Y nest/rt-table.c proto/bgp/bgp.c
2012-07-16Finalize RA_ACCEPTED handling.Ondrej Zajicek
2012-04-24Implements generalized export limits.Ondrej Zajicek
And also fixes some minor bugs in limits.
2012-04-21Fixes in generalized import limits.Ondrej Zajicek
2012-04-15Implements generalized import hooks.Ondrej Zajicek
Thanks to Alexander V. Chernikov for the original patch.
2012-04-15Implement RA_ACCEPTED mode of route propagation.Ondrej Zajicek
2012-03-15Better support for multitable protocols.Ondrej Zajicek
The nest-protocol interaction is changed to better handle multitable protocols. Multitable protocols now declare that by 'multitable' field, which tells nest that a protocol handles things related to proto-rtable interaction (table locking, announce hook adding, reconfiguration of filters) itself. Filters and stats are moved to announce hooks, a protocol could have different filters and stats to different tables. The patch is based on one from Alexander V. Chernikov, thanks.
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