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path: root/src/plugins/linux-cp/lcp_node.c
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2023-07-11linux-cp: Basic MPLS support.Adrian Pistol1-1/+99
1) Imports ENCAP_MPLS labels from IPv4/IPv6 routes. Note that this requires libnl 3.6.0 or newer. In previous patches, the fib_path_ext_t had a path ID of -1. After a long investigation, it turned out to be caused by route weight being set to 0. There is a comment explaining more details. 2) Handles MPLS routes. MPLS routes were wrongly added as IPv4 routes before. POP and SWAP are now both supported. All the routes are installed as NON-EOS and EOS routes, as the Linux kernel does not differentiate. EOS POP used in PHP uses the next-hop address family to determine the resulting address family. This patch is sufficient for P setups. PE setups with implicit null should also function okay, as long as a seperate label gets programmed per address family. PE setups with explicit null will also forward packets, but punting is a bit odd and needs MPLS input enabled on the LCP host device. 3) Propagate MPLS input state to LCP Pair and Linux. Since the Linux kernel uses the MPLS routes itself, the LCP pair tap needs MPLS enabled to allow host originated packets. This also syncs the Linux `net.mpls.conf.<host_if>.input` sysctl to allow punted packets to have MPLS labels, mostly explicit nulls. In addition, a special feature is enabled to cross connect MPLS packets coming from Linux directly to interface-output untouched. Make sure to enable MPLS/add a table in VPP first and load the MPLS kernel modules!! Type: feature Change-Id: Ie4184bb4cc96905bf8b483a27e7ca6d251697374 Signed-off-by: Adrian Pistol <vifino@posteo.net> Signed-off-by: Pim van Pelt <pim@ipng.nl>
2022-08-11linux-cp: FIB lookup for P2MP tunnel interfacesMatthew Smith1-4/+22
Type: improvement If a tun/L3 interface is paired with a multipoint tunnel interface, pass packets arriving from the host to ip[46]-lookup instead of cross-connecting them to the tunnel interface. Adjacencies are used to drive the rewrite for Multipoint tunnel interfaces, so the generic adjacency used with a P2P tunnel will not work correctly. Change-Id: I2d8be56dc5029760978c05bc4953f84c8924a412 Signed-off-by: Matthew Smith <mgsmith@netgate.com>
2021-09-08linux-cp: fix crash on failed vlib_buffer_copyPim van Pelt1-12/+24
Type: fix Signed-off-by: Pim van Pelt <pim@ipng.nl> Change-Id: I390282ecc63600728cf11413510c0169178e305c
2021-06-03linux-cp: use default adjacencyMatthew Smith1-21/+16
Type: fix Outbound packets from the host have an adjacency lookup performed so buffer metadata can be filled in and output features can be applied. If no adjacency is found for a packet, it gets dropped. This breaks DHCP and possibly other things since the DHCP reply to a discover request is sent to a destination MAC address that is determined by the contents of the request packet rather than any existing neighbor table entry. If adjacency lookup for outbound packets does not find an entry, use the default adjacency for the interface & address family. Change-Id: Ia53a4df3a5bad2991768cfe4a84c560b879e656f Signed-off-by: Matthew Smith <mgsmith@netgate.com>
2021-02-04linux-cp: Linux Interface Mirroring for Control Plane IntegrationNeale Ranns1-0/+919
Type: feature please see FEATURE.yaml for details. Signed-off-by: Neale Ranns <nranns@cisco.com> Signed-off-by: Matthew Smith <mgsmith@netgate.com> Signed-off-by: Jon Loeliger <jdl@netgate.com> Signed-off-by: Pim van Pelt <pim@ipng.nl> Change-Id: I04a45c15c0838906aa787e06660fa29f39f755fa