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)
61 #define FOR_EACH_FIB_PROTOCOL(_item) \
62 for (_item = FIB_PROTOCOL_IP4; \
63 _item <= FIB_PROTOCOL_MPLS; \
66 #define FOR_EACH_FIB_IP_PROTOCOL(_item) \
67 for (_item = FIB_PROTOCOL_IP4; \
68 _item <= FIB_PROTOCOL_IP6; \
72 * @brief Convert from a protocol to a link type
74 vnet_link_t fib_proto_to_link (fib_protocol_t proto);
77 * FIB output chain type. When a child object requests a forwarding contribution
78 * from a parent, it does so for a particular scenario. This enumererates those
81 typedef enum fib_forward_chain_type_t_ {
83 * Contribute an object that is to be used to forward IP4 packets
85 FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
87 * Contribute an object that is to be used to forward IP6 packets
89 FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
91 * Contribute an object that is to be used to forward non-end-of-stack
94 FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
96 * Contribute an object that is to be used to forward end-of-stack
97 * MPLS packets. This is a convenient ID for clients. A real EOS chain
98 * must be pay-load protocol specific. This
99 * option is converted into one of the other three internally.
101 FIB_FORW_CHAIN_TYPE_MPLS_EOS,
103 * Contribute an object that is to be used to forward Ethernet packets.
104 * This is last in the list since it is not valid for many FIB objects,
105 * and thus their array of per-chain-type DPOs can be sized smaller.
107 FIB_FORW_CHAIN_TYPE_ETHERNET,
108 } __attribute__ ((packed)) fib_forward_chain_type_t;
110 #define FIB_FORW_CHAINS { \
111 [FIB_FORW_CHAIN_TYPE_ETHERNET] = "ethernet", \
112 [FIB_FORW_CHAIN_TYPE_UNICAST_IP4] = "unicast-ip4", \
113 [FIB_FORW_CHAIN_TYPE_UNICAST_IP6] = "unicast-ip6", \
114 [FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS] = "mpls-neos", \
115 [FIB_FORW_CHAIN_TYPE_MPLS_EOS] = "mpls-eos", \
118 #define FIB_FORW_CHAIN_NUM (FIB_FORW_CHAIN_TYPE_MPLS_ETHERNET+1)
119 #define FIB_FORW_CHAIN_MPLS_NUM (FIB_FORW_CHAIN_TYPE_MPLS_EOS+1)
121 #define FOR_EACH_FIB_FORW_CHAIN(_item) \
122 for (_item = FIB_FORW_CHAIN_TYPE_UNICAST_IP4; \
123 _item <= FIB_FORW_CHAIN_TYPE_ETHERNET; \
126 #define FOR_EACH_FIB_FORW_MPLS_CHAIN(_item) \
127 for (_item = FIB_FORW_CHAIN_TYPE_UNICAST_IP4; \
128 _item <= FIB_FORW_CHAIN_TYPE_MPLS_EOS; \
132 * @brief Convert from a chain type to the adjacencies link type
134 extern vnet_link_t fib_forw_chain_type_to_link_type(fib_forward_chain_type_t fct);
137 * @brief Convert from a payload-protocol to a chain type.
139 extern fib_forward_chain_type_t fib_forw_chain_type_from_dpo_proto(dpo_proto_t proto);
142 * @brief Convert from a chain type to the DPO proto it will install
144 extern dpo_proto_t fib_forw_chain_type_to_dpo_proto(fib_forward_chain_type_t fct);
147 * Aggregrate type for a prefix
149 typedef struct fib_prefix_t_ {
158 fib_protocol_t fp_proto;
161 * Pad to keep the address 4 byte aligned
167 * The address type is not deriveable from the fp_addr member.
168 * If it's v4, then the first 3 u32s of the address will be 0.
169 * v6 addresses (even v4 mapped ones) have at least 2 u32s assigned
170 * to non-zero values. true. but when it's all zero, one cannot decide.
172 ip46_address_t fp_addr;
175 mpls_label_t fp_label;
176 mpls_eos_bit_t fp_eos;
178 * This protocol determines the payload protocol of packets
179 * that will be forwarded by this entry once the label is popped.
180 * For a non-eos entry it will be MPLS.
182 dpo_proto_t fp_payload_proto;
187 STATIC_ASSERT(STRUCT_OFFSET_OF(fib_prefix_t, fp_addr) == 4,
188 "FIB Prefix's address is 4 byte aligned.");
191 * \brief Compare two prefixes for equality
193 extern int fib_prefix_cmp(const fib_prefix_t *p1,
194 const fib_prefix_t *p2);
197 * \brief Compare two prefixes for covering relationship
199 * \return non-zero if the first prefix is a cover for the second
201 extern int fib_prefix_is_cover(const fib_prefix_t *p1,
202 const fib_prefix_t *p2);
205 * \brief Return true is the prefix is a host prefix
207 extern int fib_prefix_is_host(const fib_prefix_t *p);
209 extern u8 * format_fib_prefix(u8 * s, va_list * args);
210 extern u8 * format_fib_forw_chain_type(u8 * s, va_list * args);
212 extern dpo_proto_t fib_proto_to_dpo(fib_protocol_t fib_proto);
213 extern fib_protocol_t dpo_proto_to_fib(dpo_proto_t dpo_proto);
216 * Enurmeration of special path/entry types
218 typedef enum fib_special_type_t_ {
220 * Marker. Add new types after this one.
222 FIB_SPECIAL_TYPE_FIRST = 0,
226 FIB_SPECIAL_TYPE_LOCAL = FIB_SPECIAL_TYPE_FIRST,
230 FIB_SPECIAL_TYPE_DROP,
232 * Marker. Add new types before this one, then update it.
234 FIB_SPECIAL_TYPE_LAST = FIB_SPECIAL_TYPE_DROP,
235 } __attribute__ ((packed)) fib_special_type_t;
238 * The maximum number of types
240 #define FIB_SPEICAL_TYPE_MAX (FIB_SPEICAL_TYPE_LAST + 1)
242 #define FOR_EACH_FIB_SPEICAL_TYPE(_item) \
243 for (_item = FIB_TYPE_SPEICAL_FIRST; \
244 _item <= FIB_SPEICAL_TYPE_LAST; _item++)
246 extern u8 * format_fib_protocol(u8 * s, va_list ap);
247 extern u8 * format_vnet_link(u8 *s, va_list ap);
250 * Path flags from the control plane
252 typedef enum fib_route_path_flags_t_
254 FIB_ROUTE_PATH_FLAG_NONE = 0,
256 * Recursion constraint of via a host prefix
258 FIB_ROUTE_PATH_RESOLVE_VIA_HOST = (1 << 0),
260 * Recursion constraint of via an attahced prefix
262 FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED = (1 << 1),
263 } fib_route_path_flags_t;
267 * A representation of a path as described by a route producer.
268 * These paramenters will determine the path 'type', of which there are:
269 * 1) Attached-next-hop:
270 * a single peer on a link.
271 * It is 'attached' because it is in the same sub-net as the router, on a link
272 * directly connected to the route.
273 * It is 'next=hop' since the next-hop address of the peer is known.
275 * the next-hop is not known. but we can ARP for it.
277 * The next-hop is known but the interface is not. So to find the adj to use
278 * we must recursively resolve the next-hop.
279 * 3) deaggregate (deag)
280 * A further lookup is required.
282 typedef struct fib_route_path_t_ {
284 * The protocol of the address below. We need this since the all
285 * zeros address is ambiguous.
287 fib_protocol_t frp_proto;
289 * The next-hop address.
290 * Will be NULL for attached paths.
291 * Will be all zeros for attached-next-hop paths on a p2p interface
292 * Will be all zeros for a deag path.
294 ip46_address_t frp_addr;
297 * Will be invalid for recursive paths.
301 * The FIB index to lookup the nexthop
302 * Only valid for recursive paths.
306 * [un]equal cost path weight
312 fib_route_path_flags_t frp_flags;
314 * The outgoing MPLS label. INVALID implies no label.
316 mpls_label_t frp_label;
321 * A representation of a fib path for fib_path_encode to convey the information to the caller
323 typedef struct fib_route_path_encode_t_ {
324 fib_route_path_t rpath;
326 } fib_route_path_encode_t;