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path: root/proto/bgp/bgp.h
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2022-11-07Merge commit '8f79e6b9' into thread-nextMaria Matejka
2022-11-07Merge commit '54430df9' into thread-nextMaria Matejka
2022-10-12BGP refeed and reload with Adj-RIB-In/Out is done without route refreshMaria Matejka
2022-10-10BGP: Add option 'next hop prefer global'Ondrej Zajicek
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.
2022-10-03BGP: Do not assume that all channels are struct bgp_channelOndrej Zajicek
In principle, the channel list is a list of parent struct proto and can contain general structures of type struct channel, That is useful e.g. for adding MPLS channels to BGP.
2022-09-08Table access is now locked.Maria Matejka
2022-08-05Merge commit '971721c9' into thread-nextMaria Matejka
2022-08-03Merge commit '97476e00' into thread-nextMaria Matejka
Had to fix route source locking inside BGP export table as we need to keep the route sources properly allocated until even last BGP pending update is sent out, therefore the export table printout is accurate.
2022-08-03BGP: The bucket/prefix hashes are now a resource to allow for proper cleanupMaria Matejka
2022-08-02Merge commit 'f0507f05ce57398e135651896dace4cb68eeed54' into thread-nextMaria Matejka
2022-08-02BGP: respecting table corkMaria Matejka
2022-07-24Merge branch 'master' into backportOndrej Zajicek
2022-07-12Removing the rte_modify APIMaria Matejka
For BGP LLGR purposes, there was an API allowing a protocol to directly modify their stale routes in table before flushing them. This API was called by the table prune routine which violates the future locking requirements. Instead of this, BGP now requests a special route export and reimports these routes into the table, allowing for asynchronous execution without locking the table on export.
2022-07-11BGP: Implement BGP rolesEugene Bogomazov
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.
2022-07-11Export tables merged with BGP prefix hashMaria Matejka
Until now, if export table was enabled, Nest was storing exactly the route before rt_notify() was called on it. This was quite sloppy and spooky and it also wasn't reflecting the changes BGP does before sending. And as BGP is storing the routes to be sent anyway, we are simply keeping the already-sent routes in there to better rule out unneeded reexports. Some of the route attributes (IGP metric, preference) make no sense in BGP, therefore these will be probably replaced by something sensible. Also the nexthop shown in the short output is the BGP nexthop.
2022-07-11Merge commit 'beb5f78a' into backportMaria Matejka
2022-06-27Preexport callback now takes the channel instead of protocol as argumentMaria Matejka
Passing protocol to preexport was in fact a historical relic from the old times when channels weren't a thing. Refactoring that to match current extensibility needs.
2022-06-16Showing the nexthop resolution target in import tablesMaria Matejka
2022-06-08Merge commit '938742decc6e1d6d3a0375dd012b75172e747bbc' into haugesundMaria Matejka
2022-06-08Merge commit '950775f6fa3d569a9d7cd05e33538d35e895d688' into haugesundMaria Matejka
There were quite a lot of conflicts in flowspec validation code which ultimately led to some code being a bit rewritten, not only adapted from this or that branch, yet it is still in a limit of a merge.
2022-05-31Merge commit '4fe9881d625f10e44109a649e369a413bd98de71' into haugesundMaria Matejka
2022-05-30Merge commit 'd8661a4397e4576ac404661b192dd99d928e7890' into haugesundMaria Matejka
2022-05-30Merge commit '17f91f9e6e70f7e3f29502e854823c0d48571eaa' into haugesundMaria Matejka
2022-05-30Merge commit 'ef4313e1667a8745c8d8813ac78342ec7c035895' into haugesundMaria Matejka
2022-05-30Merge commit 'ef6a903e6f44b467f9606018446095521ad01ef1' into haugesundMaria Matejka
2022-05-30Merge commit '0d0f6554a5c233bf2bf830ae319191c4b1808d49' into haugesundMaria Matejka
2022-05-30Merge commit '4a23ede2b056a41456790cc20a0c3d92a7137693' into haugesundMaria Matejka
2022-05-30Squashing the route attribute structure into one level.Maria Matejka
For now, all route attributes are stored as eattrs in ea_list. This should make route manipulation easier and it also allows for a layered approach of route attributes where updates from filters will be stored as an overlay over the previous version.
2022-05-30Route destination field merged with nexthop attribute; splitting flowspec ↵Maria Matejka
validation result out. As there is either a nexthop or another destination specification (or othing in case of ROAs and Flowspec), it may be merged together. This code is somehow quirky and should be replaced in future by better implementation of nexthop. Also flowspec validation result has its own attribute now as it doesn't have anything to do with route nexthop.
2022-05-26Moved hostentry to eattrMaria Matejka
2022-05-04Explicit definition structures of route attributesMaria Matejka
Changes in internal API: * Every route attribute must be defined as struct ea_class somewhere. * Registration of route attributes known at startup must be done by ea_register_init() from protocol build functions. * Every attribute has now its symbol registered in a global symbol table defined as SYM_ATTRIBUTE * All attribute ID's are dynamically allocated. * Attribute value custom formatting hook is defined in the ea_class. * Attribute names are the same for display and filters, always prefixed by protocol name. Also added some unit testing code for filters with route attributes.
2022-05-04Local route attributes are always allocated from tmp_linpoolMaria Matejka
2022-05-04Splitting route data structures out to libMaria Matejka
2022-05-04Unified attribute and filter typesMaria Matejka
This commit removes the EAF_TYPE_* namespace completely and also for route attributes, filter-based types T_* are used. This simplifies fetching and setting route attributes from filters. Also, there is now union bval which serves as an universal value holder instead of private unions held separately by eattr and filter code.
2022-04-06Unsetting route attributes without messing with type systemMaria Matejka
2022-03-09Merge commit '1b9189d5' into haugesundMaria Matejka
2022-03-09Merge commit '60880b539b8886f76961125d89a265c6e1112b7a' into haugesundMaria Matejka
2022-03-09BGP Flowspec validation: Removed in-route optimization for multithreading ↵Maria Matejka
compatibility
2022-03-09Merge commit 'e42eedb9' into haugesundMaria Matejka
2022-03-09Merge commit 'd5a32563' into haugesundMaria Matejka
2022-03-02Replacing BGP temporary linpools by the common temporary linpoolMaria Matejka
2022-02-06Merge branch 'oz-trie-table'Ondrej Zajicek (work)
2022-02-06BGP: Implement flowspec validation procedureOndrej Zajicek (work)
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.
2022-01-28BGP: Use proper class in attribute error messagesOndrej Zajicek (work)
Most error messages in attribute processing are in rx/decode step and these use L_REMOTE log class. But there are few that are in tx/export step and these should use L_ERR log class. Use tx-specific macro (REJECT()) in tx/export code and rename field err_withdraw to err_reject in struct bgp_export_state to ensure that appropriate error reporting macros are called in proper contexts.
2022-01-24BGP: Log route updates that were changed to withdrawsOndrej Zajicek (work)
Typical BGP error handling is treat-as-withdraw, where an invalid route is replaced with a withdraw. Log route network when it happens.
2022-01-09BGP: Add option 'free bind'Ondrej Zajicek (work)
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.
2021-11-22Route sources have an explicit ownerMaria Matejka
This commit prevents use-after-free of routes belonging to protocols which have been already destroyed, delaying also all the protocols' shutdown until all of their routes have been finally propagated through all the pipes down to the appropriate exports. The use-after-free was somehow hypothetic yet theoretically possible in rare conditions, when one BGP protocol authors a lot of routes and the user deletes that protocol by reconfiguring in the same time as next hop update is requested, causing rte_better() to be called on a not-yet-pruned network prefix while the owner protocol has been already freed. In parallel execution environments, this would happen an inter-thread use-after-free, causing possible heisenbugs or other nasty problems.
2021-11-22Special table hooks rectified.Maria Matejka
* internal tables are now more standalone, having their own import and export hooks * route refresh/reload uses stale counter instead of stale flag, allowing to drop walking the table at the beginning * route modify (by BGP LLGR) is now done by a special refeed hook, reimporting the modified routes directly without filters
2021-11-09Split route data structure to storage (ro) / manipulation (rw) structures.Maria Matejka
Routes are now allocated only when they are just to be inserted to the table. Updating a route needs a locally allocated route structure. Ownership of the attributes is also now not transfered from protocols to tables and vice versa but just borrowed which should be easier to handle in a multithreaded environment.
2021-10-13Preexport: No route modification, no linpool neededMaria Matejka