/* * Copyright (c) 2015 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/ip_lookup.h: ip (4 or 6) lookup structures, adjacencies, ... * * 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. */ /** * @file * Definitions for all things IP (v4|v6) unicast and multicast lookup related. * * - Adjacency definitions and registration. * - Callbacks on route add. * - Callbacks on interface address change. */ #ifndef included_ip_lookup_h #define included_ip_lookup_h //#include <vnet/vnet.h> #include <vlib/vlib.h> #include <vlib/buffer.h> #include <vnet/ip/ip4_packet.h> #include <vnet/ip/ip6_packet.h> #include <vnet/ip/ip_types.h> #include <vnet/fib/fib_node.h> #include <vnet/adj/adj.h> #include <vnet/dpo/dpo.h> ///#include <vnet/feature/feature.h> /* An all zeros address */ extern const ip46_address_t zero_addr; typedef enum ip_interface_address_flags_t_ { IP_INTERFACE_ADDRESS_FLAG_STALE = (1 << 0), } __clib_packed ip_interface_address_flags_t; typedef struct { fib_prefix_t prefix; u32 sw_if_index; } ip_interface_prefix_key_t; typedef struct { /* key - prefix and sw_if_index */ ip_interface_prefix_key_t key; /* number of addresses in this prefix on the interface */ u16 ref_count; /* index of the interface address used as a default source address */ u32 src_ia_index; } ip_interface_prefix_t; typedef struct { /* Key for mhash; in fact, just a byte offset into mhash key vector. */ u32 address_key; /* Interface which has this address. */ u32 sw_if_index; /* Address (prefix) length for this interface. */ u16 address_length; /* flags relating to this prefix */ ip_interface_address_flags_t flags; /* Next and previous pointers for doubly linked list of addresses per software interface. */ u32 next_this_sw_interface; u32 prev_this_sw_interface; } ip_interface_address_t; typedef enum { IP_LOCAL_NEXT_DROP, IP_LOCAL_NEXT_PUNT, IP_LOCAL_NEXT_UDP_LOOKUP, IP_LOCAL_NEXT_ICMP, IP_LOCAL_NEXT_REASSEMBLY, IP_LOCAL_N_NEXT, } ip_local_next_t; struct ip_lookup_main_t; typedef struct ip_lookup_main_t { /** Pool of addresses that are assigned to interfaces. */ ip_interface_address_t *if_address_pool; /** Hash table mapping address to index in interface address pool. */ mhash_t address_to_if_address_index; /** Head of doubly linked list of interface addresses for each software interface. ~0 means this interface has no address. */ u32 *if_address_pool_index_by_sw_if_index; /** Pool of prefixes containing addresses assigned to interfaces */ ip_interface_prefix_t *if_prefix_pool; /** Hash table mapping prefix to index in interface prefix pool */ mhash_t prefix_to_if_prefix_index; /** First table index to use for this interface, ~0 => none */ u32 *classify_table_index_by_sw_if_index; /** Feature arc indices */ u8 mcast_feature_arc_index; u8 ucast_feature_arc_index; u8 output_feature_arc_index; /** Number of bytes in a fib result. Must be at least sizeof (uword). First word is always adjacency index. */ u32 fib_result_n_bytes, fib_result_n_words; /** 1 for ip6; 0 for ip4. */ u32 is_ip6; /** Either format_ip4_address_and_length or format_ip6_address_and_length. */ format_function_t *format_address_and_length; /** Table mapping ip protocol to ip[46]-local node next index. */ u8 local_next_by_ip_protocol[256]; /** IP_BUILTIN_PROTOCOL_{TCP,UDP,ICMP,OTHER} by protocol in IP header. */ u8 builtin_protocol_by_ip_protocol[256]; } ip_lookup_main_t; u8 *format_ip_flow_hash_config (u8 * s, va_list * args); uword unformat_ip_flow_hash_config (unformat_input_t *input, va_list *args); always_inline void ip_lookup_set_buffer_fib_index (u32 * fib_index_by_sw_if_index, vlib_buffer_t * b) { /* *INDENT-OFF* */ vnet_buffer (b)->ip.fib_index = vec_elt (fib_index_by_sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_RX]); vnet_buffer (b)->ip.fib_index = ((vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? vnet_buffer (b)->ip.fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX]); /* *INDENT-ON* */ } void ip_lookup_init (ip_lookup_main_t * lm, u32 ip_lookup_node_index); #endif /* included_ip_lookup_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */