2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef __FIB_TYPES_H__
17 #define __FIB_TYPES_H__
19 #include <vlib/vlib.h>
20 #include <vnet/ip/ip6_packet.h>
21 #include <vnet/mpls/packet.h>
22 #include <vnet/dpo/dpo.h>
25 * A typedef of a node index.
26 * we make this typedef so the code becomes easier for a human to parse.
28 typedef u32 fib_node_index_t;
29 #define FIB_NODE_INDEX_INVALID ((fib_node_index_t)(~0))
32 * Protocol Type. packed so it consumes a u8 only
34 typedef enum fib_protocol_t_ {
42 } __attribute__ ((packed)) fib_protocol_t;
44 #define FIB_PROTOCOLS { \
45 [FIB_PROTOCOL_IP4] = "ipv4", \
46 [FIB_PROTOCOL_IP6] = "ipv6", \
47 [FIB_PROTOCOL_MPLS] = "MPLS", \
51 * Definition outside of enum so it does not need to be included in non-defaulted
54 #define FIB_PROTOCOL_MAX (FIB_PROTOCOL_MPLS + 1)
57 * Not part of the enum so it does not have to be handled in switch statements
59 #define FIB_PROTOCOL_NONE (FIB_PROTOCOL_MAX+1)
62 * Link Type. This maps directly into the ethertype.
64 typedef enum fib_link_t_ {
72 } __attribute__ ((packed)) fib_link_t;
75 * Definition outside of enum so it does not need to be included in non-defaulted
78 #define FIB_LINK_NUM (FIB_LINK_MPLS+1)
81 [FIB_LINK_IP4] = "ipv4", \
82 [FIB_LINK_IP6] = "ipv6", \
83 [FIB_LINK_MPLS] = "mpls", \
86 #define FOR_EACH_FIB_LINK(_item) \
87 for (_item = FIB_LINK_IP4; \
88 _item <= FIB_LINK_MPLS; \
91 #define FOR_EACH_FIB_IP_LINK(_item) \
92 for (_item = FIB_LINK_IP4; \
93 _item <= FIB_LINK_IP6; \
97 * @brief Convert from a protocol to a link type
99 fib_link_t fib_proto_to_link (fib_protocol_t proto);
102 * FIB output chain type. When a child object requests a forwarding contribution
103 * from a parent, it does so for a particular scenario. This enumererates those
106 typedef enum fib_forward_chain_type_t_ {
108 * Contribute an object that is to be used to forward IP4 packets
110 FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
112 * Contribute an object that is to be used to forward IP6 packets
114 FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
116 * Contribute an object that is to be used to forward non-end-of-stack
119 FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
121 * Contribute an object that is to be used to forward end-of-stack
122 * MPLS packets. This is a convenient ID for clients. A real EOS chain
123 * must be pay-load protocol specific. This
124 * option is converted into one of the other three internally.
126 FIB_FORW_CHAIN_TYPE_MPLS_EOS,
127 } __attribute__ ((packed)) fib_forward_chain_type_t;
129 #define FIB_FORW_CHAINS { \
130 [FIB_FORW_CHAIN_TYPE_UNICAST_IP4] = "unicast-ip4", \
131 [FIB_FORW_CHAIN_TYPE_UNICAST_IP6] = "unicast-ip6", \
132 [FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS] = "mpls-neos", \
133 [FIB_FORW_CHAIN_TYPE_MPLS_EOS] = "mpls-eos", \
136 #define FIB_FORW_CHAIN_NUM (FIB_FORW_CHAIN_TYPE_MPLS_EOS+1)
138 #define FOR_EACH_FIB_FORW_CHAIN(_item) \
139 for (_item = FIB_FORW_CHAIN_TYPE_UNICAST_IP4; \
140 _item <= FIB_FORW_CHAIN_TYPE_MPLS_EOS; \
144 * @brief Convert from a chain type to the adjacencies link type
146 extern fib_link_t fib_forw_chain_type_to_link_type(fib_forward_chain_type_t fct);
149 * @brief Convert from a payload-protocol to a chain type.
151 extern fib_forward_chain_type_t fib_proto_to_forw_chain_type(fib_protocol_t proto);
154 * @brief Convert from a chain type to the DPO proto it will install
156 extern dpo_proto_t fib_forw_chain_type_to_dpo_proto(fib_forward_chain_type_t fct);
159 * Aggregrate type for a prefix
161 typedef struct fib_prefix_t_ {
170 fib_protocol_t fp_proto;
173 * Pad to keep the address 4 byte aligned
179 * The address type is not deriveable from the fp_addr member.
180 * If it's v4, then the first 3 u32s of the address will be 0.
181 * v6 addresses (even v4 mapped ones) have at least 2 u32s assigned
182 * to non-zero values. true. but when it's all zero, one cannot decide.
184 ip46_address_t fp_addr;
187 mpls_label_t fp_label;
188 mpls_eos_bit_t fp_eos;
190 * This protocol determines the payload protocol of packets
191 * that will be forwarded by this entry once the label is popped.
192 * For a non-eos entry it will be MPLS.
194 dpo_proto_t fp_payload_proto;
199 _Static_assert(STRUCT_OFFSET_OF(fib_prefix_t, fp_addr) == 4,
200 "FIB Prefix's address is 4 byte aligned.");
203 * \brief Compare two prefixes for equality
205 extern int fib_prefix_cmp(const fib_prefix_t *p1,
206 const fib_prefix_t *p2);
209 * \brief Compare two prefixes for covering relationship
211 * \return non-zero if the first prefix is a cover for the second
213 extern int fib_prefix_is_cover(const fib_prefix_t *p1,
214 const fib_prefix_t *p2);
217 * \brief Return true is the prefix is a host prefix
219 extern int fib_prefix_is_host(const fib_prefix_t *p);
221 extern u8 * format_fib_prefix(u8 * s, va_list * args);
222 extern u8 * format_fib_forw_chain_type(u8 * s, va_list * args);
224 extern dpo_proto_t fib_proto_to_dpo(fib_protocol_t fib_proto);
225 extern fib_protocol_t dpo_proto_to_fib(dpo_proto_t dpo_proto);
228 * Enurmeration of special path/entry types
230 typedef enum fib_special_type_t_ {
232 * Marker. Add new types after this one.
234 FIB_SPECIAL_TYPE_FIRST = 0,
238 FIB_SPECIAL_TYPE_LOCAL = FIB_SPECIAL_TYPE_FIRST,
242 FIB_SPECIAL_TYPE_DROP,
244 * Marker. Add new types before this one, then update it.
246 FIB_SPECIAL_TYPE_LAST = FIB_SPECIAL_TYPE_DROP,
247 } __attribute__ ((packed)) fib_special_type_t;
250 * The maximum number of types
252 #define FIB_SPEICAL_TYPE_MAX (FIB_SPEICAL_TYPE_LAST + 1)
254 #define FOR_EACH_FIB_SPEICAL_TYPE(_item) \
255 for (_item = FIB_TYPE_SPEICAL_FIRST; \
256 _item <= FIB_SPEICAL_TYPE_LAST; _item++)
258 extern u8 * format_fib_protocol(u8 * s, va_list ap);
259 extern u8 * format_fib_link(u8 *s, va_list ap);
262 * Path flags from the control plane
264 typedef enum fib_route_path_flags_t_
266 FIB_ROUTE_PATH_FLAG_NONE = 0,
268 * Recursion constraint of via a host prefix
270 FIB_ROUTE_PATH_RESOLVE_VIA_HOST = (1 << 0),
272 * Recursion constraint of via an attahced prefix
274 FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED = (1 << 1),
275 } fib_route_path_flags_t;
279 * A representation of a path as described by a route producer.
280 * These paramenters will determine the path 'type', of which there are:
281 * 1) Attached-next-hop:
282 * a single peer on a link.
283 * It is 'attached' because it is in the same sub-net as the router, on a link
284 * directly connected to the route.
285 * It is 'next=hop' since the next-hop address of the peer is known.
287 * the next-hop is not known. but we can ARP for it.
289 * The next-hop is known but the interface is not. So to find the adj to use
290 * we must recursively resolve the next-hop.
291 * 3) deaggregate (deag)
292 * A further lookup is required.
294 typedef struct fib_route_path_t_ {
296 * The protocol of the address below. We need this since the all
297 * zeros address is ambiguous.
299 fib_protocol_t frp_proto;
301 * The next-hop address.
302 * Will be NULL for attached paths.
303 * Will be all zeros for attached-next-hop paths on a p2p interface
304 * Will be all zeros for a deag path.
306 ip46_address_t frp_addr;
309 * Will be invalid for recursive paths.
313 * The FIB index to lookup the nexthop
314 * Only valid for recursive paths.
318 * [un]equal cost path weight
324 fib_route_path_flags_t frp_flags;
326 * The outgoing MPLS label. INVALID implies no label.
328 mpls_label_t frp_label;