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163 commits

Author SHA1 Message Date
Ondrej Zajicek d0e2d6d1e0 Show both IPv6 next hop addresses in BGP. 2009-11-17 14:17:23 +01:00
Ondrej Zajicek 3228c72cc0 Implements RFC 5004 - prefer older external routes. 2009-11-17 11:41:29 +01:00
Ondrej Zajicek 52b9b2a178 Rename as_path_get_last/as_path_get_first to be consistent. 2009-10-12 20:44:58 +02:00
Ondrej Zajicek 05198c12f4 Some cleanups. 2009-08-27 19:01:04 +02:00
Ondrej Zajicek 949bd34e81 Fixes bug related to AS2->AS4 conversion. 2009-08-25 19:01:37 +02:00
Ondrej Zajicek da95a7a7da Fixes bug in ORIGIN check. 2009-06-23 11:00:38 +02:00
Ondrej Zajicek 29c430f856 Changes handling of AS_PATH_CONFED_* segments in AS_PATH. 
Although standard says that if we receive AS_PATH_CONFED_*
(and we are not a part of a confederation) segment, we should
drop session, nobody does that and it is unwise to do that.

Now we drop session just in case that peer ASN is in
AS_PATH_CONFED_* segment (to detect peer that considers BIRD
as a part of its confederation).
 2009-06-23 10:50:57 +02:00
Ondrej Zajicek b7a735ea9d Allow 'third party' BGP updates for originated routes. 2009-04-29 22:17:40 +02:00
Ondrej Zajicek 4827b69ff4 Fixes BGP IPv6 link local next hop handling. 
When sending 'third party' BGP update, Bird used bogus link local
addresses instead of addresses it received before.
 2009-04-29 18:58:24 +02:00
Ondrej Zajicek ad440a570b Fixes handling of 'next hop self' and 'source address' configuration 
options.
 2009-04-28 18:11:56 +02:00
Ondrej Zajicek f307842ad8 Fixes BGPv6 bug - mandatory attributes weren't validated; 2009-04-23 14:44:02 +02:00
Ondrej Zajicek b9539e78d8 Fixes bug in BGPv6 causing crash by checking missing attributes. 2009-04-23 12:36:24 +02:00
Ondrej Zajicek 48d79d521c Better handling of AS4 optional attribute errors 
AS4 optional attribute errors were handled by session
drop (according to BGP RFC). This patch implements
error handling according to new BGP AS4 draft (*)
 - ignoring invalid AS4 optional attributes.

(*) http://www.ietf.org/internet-drafts/draft-chen-rfc4893bis-02.txt
 2009-03-18 20:30:21 +01:00
Ondrej Zajicek 82a79586e5 Better handling of too long attributes 
This patch extends the length for attributes from 1024 to 2048
(because both AS_PATH and AS4_PATH attributes take 2+4 B per AS).

If there is not enough space for attributes, Bird skips that
route group. Old behavior (skipping remaining attributes)
leads to skipping required attributes and session drop.
 2009-02-27 15:24:46 +01:00
Ondrej Zajicek cd17c651a6 Add format for BGP_AGGREGATOR attribute 2009-02-21 17:47:56 +01:00
Ondrej Zajicek 11b32d9117 Major changes to BGP 
Fixes two race conditions causing crash of Bird, several unhandled
cases during BGP initialization, and some other bugs. Also changes
handling of startup delay to be more useful and implement
reporting of last error in 'show protocols' command.
 2008-12-19 01:34:39 +01:00
Ondrej Zajicek aebe06b40c Proper format functions for ORIGINATOR_ID, CLUSTER_LIST 2008-11-08 23:33:22 +01:00
Ondrej Zajicek a92fe60717 Implementation of route server. 2008-11-01 12:55:43 +01:00
Ondrej Zajicek b6bf284a90 Bugfixes in MULIT_EXIT_DISC attribute handling. 
- Old MED handling was completely different from behavior
   specified in RFCs - for example they havn't been propagated
   to neighboring areas.

 - Update tie-breaking according to RFC 4271.

 - Change default value for 'default bgp_med' configuration
   option according to RFC 4271.
 2008-10-26 22:59:21 +01:00
Ondrej Zajicek 4819c3e17a Bugfix in LOCAL_PREF attribute handling. 2008-10-26 22:54:23 +01:00
Ondrej Zajicek ba5ed6f3e4 Implementation of an option for disabling AS4 support per BGP instance. 2008-10-26 22:48:02 +01:00
Ondrej Zajicek 4847a894bf Implementation of route reflection for BGP 2008-10-26 22:45:09 +01:00
Ondrej Zajicek 11cb620266 Implementation of 4B ASN support for BGP 2008-10-26 22:36:08 +01:00
Ondrej Filip 85ae398a61 The source address configuration in BGP added. 2008-08-24 23:20:46 +00:00
Ondrej Filip 98ac61766d A lot of changes: 
- metric is 3 byte long now
	- summary lsa originating
	- more OSPF areas possible
	- virtual links
	- better E1/E2 routes handling
	- some bug fixes..

I have to do:
	- md5 auth (last mandatory item from rfc2328)
	- !!!!DEBUG!!!!! (mainly virtual link system has probably a lot of bugs)
	- 2328 appendig E
 2004-06-25 16:39:53 +00:00
Martin Mares e21423bab8 ... in BGP. 2004-06-05 09:27:17 +00:00
Ondrej Filip 7fdd338c36 ALIGN -> BIRD_ALIGN 2004-06-01 10:28:25 +00:00
Martin Mares de10a974f2 Added missing semicolons. 2002-11-13 08:46:12 +00:00
Martin Mares 54e55169da BGP documented. 2000-06-04 17:06:18 +00:00
Martin Mares 5e88d73025 BGP now reports originating AS and origin type in get_route_info(). 2000-05-19 11:01:41 +00:00
Martin Mares 02bd064ab7 Adapted to new rt_notify semantics. 2000-05-13 11:02:02 +00:00
Martin Mares 2138d3b4d8 Use correct flags for the LOCAL_PREF attribute. 
When an invalid attribute is found, copy the entire attribute to the data
section of the NOTIFICATION message.
 2000-05-11 12:20:07 +00:00
Martin Mares beaf86e13c Removed RTS_RIP_EXT. 2000-05-04 21:23:10 +00:00
Martin Mares cf3d6470d7 IPv6 BGP support finished. Also simplified the BGP stuff a bit. 2000-05-04 20:02:56 +00:00
Martin Mares 1c1da87b27 Receive-only IPv6 BGP. 2000-05-04 09:03:31 +00:00
Martin Mares 85368cd4b7 Full protocol tracing. 2000-05-02 16:07:41 +00:00
Martin Mares d1a74339d4 Handle redistribution of unknown attributes correctly. 2000-05-02 12:51:39 +00:00
Martin Mares cea6366400 The `bgp_origin' attribute is now an enum. 2000-04-28 15:13:29 +00:00
Martin Mares 54896cbdba Path attribute can be missing if we process a packet with empty NLRI section. 2000-04-27 22:31:11 +00:00
Martin Mares 5db9bae286 IBGP fixes. 2000-04-26 13:26:31 +00:00
Martin Mares 99f70c78e1 Use the same attribute names as in filters. 2000-04-25 21:31:15 +00:00
Martin Mares 684c25d98f When sending BGP attributes, re-create the flags, so that attributes 
added by filters which get the flags wrong are fixed automagically.
 2000-04-25 21:21:52 +00:00
Martin Mares efcece2da3 Better reporting of both local and remote errors. 2000-04-25 21:13:25 +00:00
Martin Mares 8b258e4e65 LOCAL_PREF is now always present and exported over all ibgp connections [draft] 
Allow setting of address of the local end of the TCP connection.

Several bug fixes.
 2000-04-21 13:01:28 +00:00
Martin Mares 2a9e064d7b If no NLRI's are present in an UPDATE message, parse the attributes, but 
don't check presence of mandatory attributes. [draft-09]
 2000-04-21 12:25:35 +00:00
Martin Mares 7787ace61a Synced to draft-ietf-idr-bgp4-09. 2000-04-20 22:54:22 +00:00
Martin Mares f381cdce52 The ATOMIC_AGGREGATE parameter is optional transitive. 2000-04-19 13:54:17 +00:00
Martin Mares bd2d8190dd Honor standard communities (no_export, no_advertise, no_export_subconfed) 
when exporting routes.
 2000-04-17 13:13:08 +00:00
Martin Mares 56a2bed46b Don't import/export MED and LOCAL_PREF on external links. 
Added real comparison of BGP routes (inspired by the Cisco one).
Default local preference and default MED are now settable.
Defined filter keywords for all BGP attributes we know.
 2000-04-17 12:46:07 +00:00
Martin Mares e3558ab14e Normalize community sets when exporting. 
Set PARTIAL bits correctly.
 2000-04-17 11:25:15 +00:00
Martin Mares 1ed2fe9609 Send and receive communities. 2000-04-17 10:19:15 +00:00
Martin Mares f421cfdd80 Sending of update messages works! 2000-04-17 09:37:31 +00:00
Martin Mares c0668f3696 Created nest/a-path.c and a-set.c which should contain general operations 
on AS paths and community sets.

Moved as_path_prepend() there.

Pavel, please move the other functions as well.
 2000-04-17 07:53:29 +00:00
Martin Mares c8f685cb9d Made last Pavel's changes compile. 2000-04-12 14:14:47 +00:00
Pavel Machek 0a40e97328 as_path_prepend is usable outside bgp. 2000-04-12 14:12:37 +00:00
Martin Mares c2b28c9910 Real bucket lists. 2000-04-12 14:09:26 +00:00
Martin Mares 7750634946 Introduced `ARRAY_SIZE' macro to replace all the sizeof(a)/sizeof(*a) constructs. 2000-04-12 13:21:23 +00:00
Martin Mares ae8f558499 Implemented outgoing attribute cache. 2000-04-10 12:39:51 +00:00
Martin Mares 48e842cc98 Use neighbor cache to track direct route to the peer or multihop destination. 
Calculate next_hop properly based on the local address we get from the
neighbor entry.
 2000-04-10 11:21:40 +00:00
Martin Mares ef2c708dfa More BGP progress... 
For Pavel: You can use bgp_path_prepend() for prepending AS numbers to AS paths.
 2000-04-09 22:05:02 +00:00
Martin Mares 10be74da20 Formatting of dynamic attributes (except for paths and communities which 
will be added soon).
 2000-04-01 10:21:11 +00:00
Martin Mares c00d31befa Parsing of BGP attributes. 2000-03-31 23:21:37 +00:00
Martin Mares c01e37416d Started work on BGP. Wrote main part of the connection handling code. 2000-03-20 21:50:17 +00:00