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path: root/src/vnet/fib/fib_path_list.c
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2018-03-20FIB Interpose SourceNeale Ranns1-5/+2
The interpose source allows the source/provider to insert/interpose a DPO in the forwarding chain of the FIB entry ahead of the forwarding provided by the next best source. For example if the API source (i.e the 'control plane') has provided an adjacency for forwarding, then an interpose source (e.g. a monitoring service) couold interpose a replicatte DPO to copy the traffic to another location AND forward using the API's adjacency. To use the interose feature an existing source (i.e FIB_SOURCE_PLUGIN_HI) cn specifiy as a flag FIB_ENTRY_FLAG_INTERPOSE and provide a DPO to interpose. One might also consider using interpose in conjunction with FIB_ENTRY_FLAG_COVER_INHERIT to ensure the interpose object affects all prefixes in the sub-tree. Change-Id: I8b2737b985f8f7c08123406d0491881def347b52 Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-12-19FIB memory leak during recursive loop detectionNeale Ranns1-0/+2
Change-Id: I5ecd43330b3329b072e6da62a4eed1641eb17f8f Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-12-15fib: fix show fib path-list and pathFlorin Coras1-2/+2
Change-Id: I465282e513b6a0482e96dd02fc7e0e4ed3e3731a Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-12-09BIER in non-MPLS netowrksNeale Ranns1-25/+32
as decsribed in section 2.2 ihttps://tools.ietf.org/html/draft-ietf-bier-mpls-encapsulation-10 with BIFT encoding from: https://tools.ietf.org/html/draft-wijnandsxu-bier-non-mpls-bift-encoding-00 changes: 1 - introduce the new BIFT lookup table. BIER tables that have an associated MPLS label are added to the MPLS-FIB. Those that don't are added to the BIER table 2 - BIER routes that have no associated output MPLS label will add a BIFT label. 3 - The BIER FMask has a path-list as a member to resolve via any possible path. Change-Id: I1fd4d9dbd074f0e855c16e9329b81460ebe1efce Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-11-26FIB: store the node type not the function pointer.Neale Ranns1-2/+0
Saves memory at no appreciable performance cost. before: DBGvpp# sh fib mem FIB memory Name Size in-use /allocated totals Entry 80 7 / 150 560/12000 after: DBGvpp# sh fib mem FIB memory Name Size in-use /allocated totals Entry 72 7 / 7 504/504 Change-Id: Ic5d3920ceb57b54260dc9af2078c26484335fef1 Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-11-09BIERNeale Ranns1-0/+5
- see draft-ietf-bier-mpls-encapsulation-10 - midpoint, head and tail functions - supported payload protocols; IPv4 and IPv6 only. Change-Id: I59d7363bb6fdfdce8e4016a68a9c8f5a5e5791cb Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-08-08L2 over MPLSNeale Ranns1-2/+2
[support for VPWS/VPLS] - switch to using dpo_proto_t rather than fib_protocol_t in fib_paths so that we can describe L2 paths - VLIB nodes to handle pop/push of MPLS labels to L2 Change-Id: Id050d06a11fd2c9c1c81ce5a0654e6c5ae6afa6e Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-07-18FIB path preferenceNeale Ranns1-0/+10
Paths are given a preference, lowest value is 'best'. Only paths that are up are up contribute to fprwarding - that's unchanged. What's new is that of the path's that re up only those that have the best preference contribute. A poor man's primary and backup. It's not true primary/backup function because the FIB must converge before the lower preference paths are used. Change-Id: Ie4453c4a7b1094c6c2b51fe1594b8302103bb68e Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-05-23ARP/ND entries for the same address on different interfaces (VPP-848)Neale Ranns1-9/+22
there are, intentionally, no validation checks in the ARP/ND code to prevent an ARP/ND entry from being installed for an address that is not local to the interface's sub-net. This is ok, since the adjacency/FIB code is designed to handle this case using the 'refinement' criteria - i.e. only installing a FIB entry for the address if the address 'refines' (i.e. is more specific than) the interface's sub-net. However, the refinement criteria currently operates on the FIB entry's prefix (which is a /32, so on the address) and not on the next-hop in the path. So, enter multiple ARP entries for the same address on different links, and this refinement criteria uses only the last added path, and so will remove the FIB entry should the ARP entries be added in the 'wrong' order. This fix updates the refinement criteria to work on each path of the FIB entry. The entry is installed if one of the paths refines the covers and only paths refining the cover contribute forwarding. Per-path refinement checks are stored in path-extensions. The patch is rather large as path-extension, which were previously used only for out-going MPLS labels, have been generalized. Change-Id: I00be359148cb948c32c52109e832a70537a7920a Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-04-24Improve Load-Balance MAPsNeale Ranns1-12/+61
- only build them for popular path-lists (where popular means more than 64 children) the reason to have a map is to improve convergence speed for recursive prefixes - if there are only a few this technique is not needed - only build them when there is at least one path that has recursive constraints, i.e. a path that can 'fail' in a PIC scenario. - Use the MAPS in the switch path. - PIC test cases for functionality (not convergence performance) Change-Id: I70705444c8469d22b07ae34be82cfb6a01358e10 Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-04-07MPLS McastNeale Ranns1-98/+172
1 - interface-DPO Used in the Data-plane to change a packet's input interface 2 - MPLS multicast FIB entry Same as a unicast entry but it links to a replicate not a load-balance DPO 3 - Multicast MPLS tunnel Update MPLS tunnels to use a FIB path-list to describe the endpoint[s]. Use the path-list to generate the forwarding chain (DPOs) to link to . 4 - Resolve a path via a local label (of an mLDP LSP) For IP multicast entries to use an LSP in the replication list, we need to decribe the 'resolve-via-label' where the label is that of a multicast LSP. 5 - MPLS disposition path sets RPF-ID For a interface-less LSP (i.e. mLDP not RSVP-TE) at the tail of the LSP we still need to perform an RPF check. An MPLS disposition DPO performs the MPLS pop validation checks and sets the RPF-ID in the packet. 6 - RPF check with per-entry RPF-ID An RPF-ID is used instead of a real interface SW if index in the case the IP traffic arrives from an LSP that does not have an associated interface. Change-Id: Ib92e177be919147bafeb599729abf3d1abc2f4b3 Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-02-25MFIB: changes to improve route add/delete performanceNeale Ranns1-5/+3
Change-Id: I063d85200d12b09545ae1c373c7fc69112ae3b34 Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-01-27IP Multicast FIB (mfib)Neale Ranns1-3/+6
- IPv[46] mfib tables with support for (*,G/m), (*,G) and (S,G) exact and longest prefix match - Replication represented via a new replicate DPO. - RPF configuration and data-plane checking - data-plane signals sent to listening control planes. The functions of multicast forwarding entries differ from their unicast conterparts, so we introduce a new mfib_table_t and mfib_entry_t objects. However, we re-use the fib_path_list to resolve and build the entry's output list. the fib_path_list provides the service to construct a replicate DPO for multicast. 'make tests' is added to with two new suites; TEST=mfib, this is invocation of the CLI command 'test mfib' which deals with many path add/remove, flag set/unset scenarios, TEST=ip-mcast, data-plane forwarding tests. Updated applications to use the new MIFB functions; - IPv6 NS/RA. - DHCPv6 unit tests for these are undated accordingly. Change-Id: I49ec37b01f1b170335a5697541c8fd30e6d3a961 Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-01-05FIB memory leaks (VPP-578)Neale Ranns1-8/+18
1) vec_free the fe_srcs of a fib_entry_t when the fib_entry_t is itself reed 2) in the load-balance fixup if a drop path is required add this to a new vector of next-hops 'fixed_nhs'. This vector is managed by the load-balance function. The caller continues to manage its own set. The function is now const implying that the caller is safe to assume the next-hops do not change. Change-Id: I0f29203ee16b9a270f40edf237488fa99ba65320 Signed-off-by: Neale Ranns <nranns@cisco.com> Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
2016-12-28Reorganize source tree to use single autotools instanceDamjan Marion1-0/+1223
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>