/* * Copyright (c) 2016 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. */ /* * ip/ip6.h: ip6 main include file * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef included_ip_ip6_h #define included_ip_ip6_h #include #include #include #include #include #include #include #include #include /* * Default size of the ip6 fib hash table */ #define IP6_FIB_DEFAULT_HASH_NUM_BUCKETS (64 * 1024) #define IP6_FIB_DEFAULT_HASH_MEMORY_SIZE (32<<20) typedef struct { ip6_address_t addr; u32 dst_address_length; u32 vrf_index; } ip6_fib_key_t; typedef struct { /* Table ID (hash key) for this FIB. */ u32 table_id; /* Index into FIB vector. */ u32 index; /* flow hash configuration */ flow_hash_config_t flow_hash_config; } ip6_fib_t; struct ip6_main_t; typedef void (ip6_add_del_interface_address_function_t) (struct ip6_main_t * im, uword opaque, u32 sw_if_index, ip6_address_t * address, u32 address_length, u32 if_address_index, u32 is_del); typedef struct { ip6_add_del_interface_address_function_t *function; uword function_opaque; } ip6_add_del_interface_address_callback_t; /** * Enumeration of the FIB table instance types */ typedef enum ip6_fib_table_instance_type_t_ { /** * This table stores the routes that are used to forward traffic. * The key is the prefix, the result the adjacnecy to forward on. */ IP6_FIB_TABLE_FWDING, /** * The table that stores ALL routes learned by the DP. * Some of these routes may not be ready to install in forwarding * at a given time. * The key in this table is the prefix, the result is the fib_entry_t */ IP6_FIB_TABLE_NON_FWDING, } ip6_fib_table_instance_type_t; #define IP6_FIB_NUM_TABLES (IP6_FIB_TABLE_NON_FWDING+1) /** * A represenation of a single IP6 table */ typedef struct ip6_fib_table_instance_t_ { /* The hash table */ BVT (clib_bihash) ip6_hash; /* bitmap / refcounts / vector of mask widths to search */ uword *non_empty_dst_address_length_bitmap; u8 *prefix_lengths_in_search_order; i32 dst_address_length_refcounts[129]; } ip6_fib_table_instance_t; typedef struct ip6_main_t { /** * The two FIB tables; fwding and non-fwding */ ip6_fib_table_instance_t ip6_table[IP6_FIB_NUM_TABLES]; ip_lookup_main_t lookup_main; /* Pool of FIBs. */ struct fib_table_t_ *fibs; /* Network byte orders subnet mask for each prefix length */ ip6_address_t fib_masks[129]; /* Table index indexed by software interface. */ u32 *fib_index_by_sw_if_index; /* IP6 enabled count by software interface */ u8 *ip_enabled_by_sw_if_index; /* Hash table mapping table id to fib index. ID space is not necessarily dense; index space is dense. */ uword *fib_index_by_table_id; /* Hash table mapping interface rewrite adjacency index by sw if index. */ uword *interface_route_adj_index_by_sw_if_index; /* Functions to call when interface address changes. */ ip6_add_del_interface_address_callback_t * add_del_interface_address_callbacks; /* Template used to generate IP6 neighbor solicitation packets. */ vlib_packet_template_t discover_neighbor_packet_template; /* ip6 lookup table config parameters */ u32 lookup_table_nbuckets; uword lookup_table_size; /* Seed for Jenkins hash used to compute ip6 flow hash. */ u32 flow_hash_seed; struct { /* TTL to use for host generated packets. */ u8 ttl; u8 pad[3]; } host_config; /* HBH processing enabled? */ u8 hbh_enabled; } ip6_main_t; /* Global ip6 main structure. */ extern ip6_main_t ip6_main; /* Global ip6 input node. Errors get attached to ip6 input node. */ extern vlib_node_registration_t ip6_input_node; extern vlib_node_registration_t ip6_rewrite_node; extern vlib_node_registration_t ip6_rewrite_local_node; extern vlib_node_registration_t ip6_discover_neighbor_node; extern vlib_node_registration_t ip6_glean_node; extern vlib_node_registration_t ip6_midchain_node; extern vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node; /* ipv6 neighbor discovery - timer/event types */ typedef enum { ICMP6_ND_EVENT_INIT, } ip6_icmp_neighbor_discovery_event_type_t; typedef union { u32 add_del_swindex; struct { u32 up_down_swindex; u32 fib_index; } up_down_event; } ip6_icmp_neighbor_discovery_event_data_t; always_inline uword ip6_destination_matches_route (const ip6_main_t * im, const ip6_address_t * key, const ip6_address_t * dest, uword dest_length) { int i; for (i = 0; i < ARRAY_LEN (key->as_uword); i++) { if ((key->as_uword[i] ^ dest->as_uword[i]) & im-> fib_masks[dest_length].as_uword[i]) return 0; } return 1; } always_inline uword ip6_destination_matches_interface (ip6_main_t * im, ip6_address_t * key, ip_interface_address_t * ia) { ip6_address_t *a = ip_interface_address_get_address (&im->lookup_main, ia); return ip6_destination_matches_route (im, key, a, ia->address_length);