Distributed Virtual Router Support - vpp - Vector Packet Processing

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author	Neale Ranns <nranns@cisco.com>	2017-10-03 08:20:21 -0700
committer	Damjan Marion <dmarion.lists@gmail.com>	2017-10-05 09:50:26 +0000
commit	6f6311560380d0e992f710558e213df1b098ef94 (patch)
tree	237e34a2165ed5d2fc0848a1daec457ce57acc3e /test/vpp_neighbor.py
parent	d3c008d108aa2187d1a2afe2833b4de25ca2c2ab (diff)

Distributed Virtual Router Support

A distributed virtual router works by attmpeting to switch a packet, but on failing to find a local consumer (i.e. the packet is destined to a locally attached host) then the packet is sent unmodified 'upstream' to where the rest of the 'distributed' router is present. When L3 switching a packet this means the L2 header must not be modifed. This patch adds a 'l2-bridge' object to the L3 FIB which re-injects packets from the L3 path back into the L2 path - use with extreme caution. Change-Id: I069724eb45956647d7980cbe40a80a788ee6ee82 Signed-off-by: Neale Ranns <nranns@cisco.com>

Diffstat (limited to 'test/vpp_neighbor.py')

0 files changed, 0 insertions, 0 deletions

/* * gre.h: types/functions for gre. * * Copyright (c) 2012 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef included_gre_h #define included_gre_h #include <vnet/vnet.h> #include <vnet/gre/packet.h> #include <vnet/ip/ip.h> #include <vnet/pg/pg.h> #include <vnet/ip/format.h> #include <vnet/adj/adj_types.h> extern vnet_hw_interface_class_t gre_hw_interface_class; typedef enum { #define gre_error(n,s) GRE_ERROR_##n, #include <vnet/gre/error.def> #undef gre_error GRE_N_ERROR, } gre_error_t; /** * A GRE payload protocol registration */ typedef struct { /** Name (a c string). */ char * name; /** GRE protocol type in host byte order. */ gre_protocol_t protocol; /** Node which handles this type. */ u32 node_index; /** Next index for this type. */ u32 next_index; } gre_protocol_info_t; /** * @brief The GRE tunnel type */ typedef enum gre_tunnel_tyoe_t_ { /** * L3 GRE (i.e. this tunnel is in L3 mode) */ GRE_TUNNEL_TYPE_L3, /** * Transparent Ethernet Bridging - the tunnel is in L2 mode */ GRE_TUNNEL_TYPE_TEB, } gre_tunnel_type_t; #define GRE_TUNNEL_TYPE_NAMES { \ [GRE_TUNNEL_TYPE_L3] = "L3", \ [GRE_TUNNEL_TYPE_TEB] = "TEB", \ } #define GRE_TUNNEL_N_TYPES ((gre_tunnel_type_t)GRE_TUNNEL_TYPE_TEB+1) /** * @brief A representation of a GRE tunnel */ typedef struct { /** * Linkage into the FIB object graph */ fib_node_t node; /** * The tunnel's source/local address */ ip46_address_t tunnel_src; /** * The tunnel's destination/remote address */ fib_prefix_t tunnel_dst; /** * The FIB in which the src.dst address are present */ u32 outer_fib_index; u32 hw_if_index; u32 sw_if_index; gre_tunnel_type_t type; /** * The FIB entry sourced by the tunnel for its destination prefix */ fib_node_index_t fib_entry_index; /** * The tunnel is a child of the FIB entry for its desintion. This is * so it receives updates when the forwarding information for that entry * changes. * The tunnels sibling index on the FIB entry's dependency list. */ u32 sibling_index; /** * on a L2 tunnel this is the VLIB arc from the L2-tx to the l2-midchain */ u32 l2_tx_arc; /** * an L2 tunnel always rquires an L2 midchain. cache here for DP. */ adj_index_t l2_adj_index; } gre_tunnel_t; /** * @brief GRE related global data */ typedef struct { /** * pool of tunnel instances */ gre_tunnel_t *tunnels; /** * GRE payload protocol registrations */ gre_protocol_info_t * protocol_infos; /** * Hash tables mapping name/protocol to protocol info index. */ uword * protocol_info_by_name, * protocol_info_by_protocol; /** * Hash mapping ipv4 src/dst addr pair to tunnel */ uword * tunnel_by_key4; /** * Hash mapping ipv6 src/dst addr pair to tunnel */ uword * tunnel_by_key6; /** * Free vlib hw_if_indices. * A free list per-tunnel type since the interfaces ctreated are fo different * types and we cannot change the type. */ u32 * free_gre_tunnel_hw_if_indices[GRE_TUNNEL_N_TYPES]; /** * Mapping from sw_if_index to tunnel index */ u32 * tunnel_index_by_sw_if_index; /* Sparse vector mapping gre protocol in network byte order to next index. */ u16 * next_by_protocol; /* convenience */ vlib_main_t * vlib_main; vnet_main_t * vnet_main; } gre_main_t; /** * @brief IPv4 and GRE header. */ typedef CLIB_PACKED (struct { ip4_header_t ip4; gre_header_t gre; }) ip4_and_gre_header_t; /** * @brief IPv6 and GRE header. */ typedef CLIB_PACKED (struct { ip6_header_t ip6; gre_header_t gre; }) ip6_and_gre_header_t; always_inline gre_protocol_info_t * gre_get_protocol_info (gre_main_t * em, gre_protocol_t protocol) { uword * p = hash_get (em->protocol_info_by_protocol, protocol); return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0; } extern gre_main_t gre_main; /* Register given node index to take input for given gre type. */ void gre_register_input_type (vlib_main_t * vm, gre_protocol_t protocol, u32 node_index); extern clib_error_t * gre_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags); extern void gre_tunnel_stack (adj_index_t ai); extern void gre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai); format_function_t format_gre_protocol; format_function_t format_gre_header; format_function_t format_gre_header_with_length; extern vlib_node_registration_t gre4_input_node; extern vlib_node_registration_t gre6_input_node; extern vnet_device_class_t gre_device_class; extern vnet_device_class_t gre_device_teb_class; /* Parse gre protocol as 0xXXXX or protocol name. In either host or network byte order. */ unformat_function_t unformat_gre_protocol_host_byte_order; unformat_function_t unformat_gre_protocol_net_byte_order; /* Parse gre header. */ unformat_function_t unformat_gre_header; unformat_function_t unformat_pg_gre_header; void gre_register_input_protocol (vlib_main_t * vm, gre_protocol_t protocol, u32 node_index); /* manually added to the interface output node in gre.c */ #define GRE_OUTPUT_NEXT_LOOKUP 1 typedef struct { u8 is_add; ip46_address_t src, dst; u8 is_ipv6; u32 outer_fib_id; u8 teb; } vnet_gre_add_del_tunnel_args_t; int vnet_gre_add_del_tunnel (vnet_gre_add_del_tunnel_args_t *a, u32 * sw_if_indexp); #endif /* included_gre_h */


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