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2022-04-07BFD: Add 'strict bind' optionOndrej Zajicek (work)
Add BFD protocol option 'strict bind' to use separate listening socket for each BFD interface bound to its address instead of using shared listening sockets.
2022-02-27Babel: Fix bug in iface reconfigurationOndrej Zajicek (work)
A recent change in Babel causes ifaces to disappear after reconfiguration. The patch fixes that. Thanks to Johannes Kimmel for an insightful bugreport.
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.
2022-02-06Nest: Attach prefix trie to rtable for faster LPM and interval queriesOndrej Zajicek (work)
Attach a prefix trie to IP/VPN/ROA tables. Use it for net_route() and net_roa_check(). This leads to 3-5x speedups for IPv4 and 5-10x speedup for IPv6 of these calls. TODO: - Rebuild the trie during rt_prune_table() - Better way to avoid trie_add_prefix() in net_get() for existing tables - Make it configurable (?)
2022-01-28BGP: Make routing loops silentOndrej Zajicek (work)
One of previous commits added error logging of invalid routes. This also inadvertently caused error logging of route loops, which should be ignored silently. Fix that.
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.
2022-01-28BGP: Improve 'invalid next hop' error reportingOndrej Zajicek (work)
Distinguish multiple causes of 'invalid next hop' message and report the relevant next hop address. Thanks to Simon Ruderich for the original patch.
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.
2021-12-18RPKI: Add contextual out-of-bound checks in RTR Prefix PDU handlerJob Snijders
RFC 6810 and RFC 8210 specify that the "Max Length" value MUST NOT be less than the Prefix Length element (underflow). On the other side, overflow of the Max Length element also is possible, it being an 8-bit unsigned integer allows for values larger than 32 or 128. This also implicitly ensures there is no overflow of "Length" value. When a PDU is received where the Max Length field is corrputed, the RTR client (BIRD) should immediately terminate the session, flush all data learned from that cache, and log an error for the operator. Minor changes done by commiter.
2021-06-17Nest: Clean up main channel handlingOndrej Zajicek (work)
Remove assumption that main channel is the only channel.
2021-06-09Babel: Simplify auth expirationOndrej Zajicek (work)
Just use hello_expiry for that, keep init_expiry for initial unauthentized neighbors.
2021-06-06Babel: Add MAC authentication support - updateOndrej Zajicek (work)
Some cleanups and bugfixes to the previous patch, including: - Fix rate limiting in index mismatch check - Fix missing BABEL_AUTH_INDEX_LEN in auth_tx_overhead computation - Fix missing auth_tx_overhead recalculation during reconfiguration - Fix pseudoheader construction in babel_auth_sign() (sport vs fport) - Fix typecasts for ptrdiffs in log messages - Make auth log messages similar to corresponding RIP/OSPF ones - Change auth log messages for events that happen during regular operation to debug messages - Switch meaning of babel_auth_check*() functions for consistency with corresponding RIP/OSPF ones - Remove requirement for min/max key length, only those required by given MAC code are enforced
2021-06-06Babel: Add MAC authentication supportToke Høiland-Jørgensen
This implements support for MAC authentication in the Babel protocol, as specified by RFC 8967. The implementation seeks to follow the RFC as close as possible, with the only deliberate deviation being the addition of support for all the HMAC algorithms already supported by Bird, as well as the Blake2b variant of the Blake algorithm. For description of applicability, assumptions and security properties, see RFC 8967 sections 1.1 and 1.2.
2021-06-06Babel: Refactor TLV parsing code for easier reuseToke Høiland-Jørgensen
In preparation for adding authentication checks, refactor the TLV walking code so it can be reused for a separate pass of the packet for authentication checks.
2021-06-01BGP: Ensure that freed neighbor entry is not accessedOndrej Zajicek (work)
Routes from downed protocols stay in rtable (until next rtable prune cycle ends) and may be even exported to another protocol. In BGP case, source BGP protocol is examined, although dynamic parts (including neighbor entries) are already freed. That may lead to crash under some race conditions. Ensure that freed neighbor entry is not accessed to avoid this issue.
2021-05-30Babel: Seqno requests are properly decoupled from neighbors when the ↵Maria Matejka
underlying interface disappears When an interface disappears, all the neighbors are freed as well. Seqno requests were anyway not decoupled from them, leading to strange segfaults. This fix adds a proper seqno request list inside neighbors to make sure that no pointer to neighbor is kept after free.
2021-05-26OSPF: Fix OSPFv3 in IPv4 mode with multiple areasOndrej Zajicek (work)
Some area handling code got confused by IPv4 setup in OSPFv3 mode.
2021-05-10Babel: Log the reason when refusing to run on an interfaceOndrej Zajicek (work)
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!
2021-05-10OSPF: Allow ifaces with host address as unnumbered PtP or PtMP ifacesOndrej Zajicek (work)
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
2021-05-09OSPF: Packets on PtP networks should be always sent to AllSPFRoutersOndrej Zajicek (work)
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.
2021-05-09OSPF: Minor refactoring of packet sending codeOndrej Zajicek (work)
Common behavior for LSupd and delayed LSack moved to ospf_send_to_iface() and other minor changes.
2021-03-30Routing tables list iteration should use explicit node struct positionMaria Matejka
2021-03-30BGP: Do not keep BAF_EXT_LEN flag internallyOndrej Zajicek (work)
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.
2021-03-18BGP: Do not show statisticsOndrej Zajicek (work)
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.
2021-03-17RPKI: Improve error handling of DNS resolverOndrej Zajicek (work)
2021-03-17Minor fixes for restricted buildsOndrej Zajicek (work)
2021-03-16Pipe: Propagate debug flags from protocol to channelsOndrej Zajicek (work)
Pipe channels are kind-of implicit, so setting protocol debug flags should also set pipe debug flags.
2021-03-16OSPFv3: Update neighbor authentication state from Hello packetsOndrej Zajicek (work)
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.
2021-03-10Static: Implement reload hookOndrej Zajicek (work)
2021-02-12Nest: Add option to control automatic RPKI reloadOndrej Zajicek (work)
Also, no automatic reload for BGP channels without import/export table.
2021-02-10BGP: Add support for BGP hostname capabilityVincent Bernat
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.
2021-01-22MRT: Fix MP-BGP next hopsOndrej Zajicek (work)
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.
2021-01-12MRT: Fix IPv6 table dumpsOndrej Zajicek (work)
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.
2021-01-10BFD: Dispatch sessions also by interface indexOndrej Zajicek (work)
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.
2021-01-07RPKI: Remove port (and SSH username) from 'Cache server' output lineOndrej Zajicek (work)
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.
2021-01-06BGP: Deprecate 'missing lladdr' optionOndrej Zajicek (work)
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.
2020-12-28Static: Fix handling of 'net' attribute in per-route filtersOndrej Zajicek (work)
We need to define 'net' field temporarily as it may be accessed by per-route filters. Thanks to Damian Zaremba for the bugreport.
2020-12-07Nest: Per-channel debug flagsOndrej Zajicek (work)
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.
2020-11-25BGP: Zero the newly allocated bucket structureOndrej Zajicek (work)
This fixes an issue with dirty node passed to add_tail(). Thanks to Andreas Rammhold for the initial patch.
2020-11-24Fix some failed asserts due to add_tail()Ondrej Zajicek (work)
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.
2020-11-24Some minor sl_allocz() cleanupsOndrej Zajicek (work)
2020-11-24lib/slab: introduce sl_allocz() function and use it in BabelToke Høiland-Jørgensen
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: baac7009063d ("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().
2020-11-19Static: Support for multiple routes with the same networkOndrej Zajicek (work)
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.
2020-11-18OSPFv3: Fix intra-area-prefix-LSA origination on DROndrej Zajicek (work)
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.
2020-11-12BFD: Better handling of BFD options in BGP configsOndrej Zajicek (work)
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.
2020-11-12BFD: Fix superfluous reconfiguration of sessionsOndrej Zajicek (work)
2020-11-08BFD: Allow per-request session optionsOndrej Zajicek (work)
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).
2020-10-11RPKI: Add 'ignore max length' optionOndrej Zajicek (work)
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.
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