2 * Copyright (c) 2015 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.
18 * @brief Segment Routing data structures definitions
22 #ifndef included_vnet_sr_h
23 #define included_vnet_sr_h
25 #include <vnet/vnet.h>
26 #include <vnet/sr/sr_packet.h>
27 #include <vnet/ip/ip6_packet.h>
28 #include <vnet/ethernet/ethernet.h>
33 #define IPv6_DEFAULT_HEADER_LENGTH 40
34 #define IPv6_DEFAULT_HOP_LIMIT 64
35 #define IPv6_DEFAULT_MAX_MASK_WIDTH 128
37 #define SR_BEHAVIOR_END 1
38 #define SR_BEHAVIOR_X 2
39 #define SR_BEHAVIOR_D_FIRST 3 /* Unused. Separator in between regular and D */
40 #define SR_BEHAVIOR_DX2 4
41 #define SR_BEHAVIOR_DX6 5
42 #define SR_BEHAVIOR_DX4 6
43 #define SR_BEHAVIOR_DT6 7
44 #define SR_BEHAVIOR_DT4 8
45 #define SR_BEHAVIOR_LAST 9 /* Must always be the last one */
48 #define SR_STEER_IPV4 4
49 #define SR_STEER_IPV6 6
51 #define SR_FUNCTION_SIZE 4
52 #define SR_ARGUMENT_SIZE 4
54 #define SR_SEGMENT_LIST_WEIGHT_DEFAULT 1
57 * @brief SR Segment List (SID list)
61 ip6_address_t *segments; /**< SIDs (key) */
63 u32 weight; /**< SID list weight (wECMP / UCMP) */
65 u8 *rewrite; /**< Precomputed rewrite header */
66 u8 *rewrite_bsid; /**< Precomputed rewrite header for bindingSID */
68 dpo_id_t bsid_dpo; /**< DPO for Encaps/Insert for BSID */
69 dpo_id_t ip6_dpo; /**< DPO for Encaps/Insert IPv6 */
70 dpo_id_t ip4_dpo; /**< DPO for Encaps IPv6 */
74 #define SR_POLICY_TYPE_DEFAULT 0
75 #define SR_POLICY_TYPE_SPRAY 1
81 u32 *segments_lists; /**< SID lists indexes (vector) */
83 ip6_address_t bsid; /**< BindingSID (key) */
85 u8 type; /**< Type (default is 0) */
86 /* SR Policy specific DPO */
87 /* IF Type = DEFAULT Then Load Balancer DPO among SID lists */
88 /* IF Type = SPRAY then Spray DPO with all SID lists */
89 dpo_id_t bsid_dpo; /**< SR Policy specific DPO - BSID */
90 dpo_id_t ip4_dpo; /**< SR Policy specific DPO - IPv6 */
91 dpo_id_t ip6_dpo; /**< SR Policy specific DPO - IPv4 */
93 u32 fib_table; /**< FIB table */
95 u8 is_encap; /**< Mode (0 is SRH insert, 1 Encaps) */
103 ip6_address_t localsid; /**< LocalSID IPv6 address */
105 char end_psp; /**< Combined with End.PSP? */
107 u16 behavior; /**< Behavior associated to this localsid */
111 u32 sw_if_index; /**< xconnect only */
112 u32 vrf_index; /**< vrf only */
115 u32 fib_table; /**< FIB table where localsid is registered */
117 u32 vlan_index; /**< VLAN tag (not an index) */
119 ip46_address_t next_hop; /**< Next_hop for xconnect usage only */
121 u32 nh_adj; /**< Next_adj for xconnect usage only */
123 void *plugin_mem; /**< Memory to be used by the plugin callback functions */
126 typedef int (sr_plugin_callback_t) (ip6_sr_localsid_t * localsid);
129 * @brief SR LocalSID behavior registration
133 u16 sr_localsid_function_number; /**< SR LocalSID plugin function (>SR_BEHAVIOR_LAST) */
135 u8 *function_name; /**< Function name. (key). */
137 u8 *keyword_str; /**< Behavior keyword (i.e. End.X) */
139 u8 *def_str; /**< Behavior definition (i.e. Endpoint with cross-connect) */
141 u8 *params_str; /**< Behavior parameters (i.e. <oif> <IP46next_hop>) */
143 dpo_type_t dpo; /**< DPO type registration */
145 format_function_t *ls_format; /**< LocalSID format function */
147 unformat_function_t *ls_unformat; /**< LocalSID unformat function */
149 sr_plugin_callback_t *creation; /**< Function within plugin that will be called after localsid creation*/
151 sr_plugin_callback_t *removal; /**< Function within plugin that will be called before localsid removal */
152 } sr_localsid_fn_registration_t;
155 * @brief Steering db key
157 * L3 is IPv4/IPv6 + mask
158 * L2 is sf_if_index + vlan
166 ip46_address_t prefix; /**< IP address of the prefix */
167 u32 mask_width; /**< Mask width of the prefix */
168 u32 fib_table; /**< VRF of the prefix */
172 u32 sw_if_index; /**< Incoming software interface */
175 u8 traffic_type; /**< Traffic type (IPv4, IPv6, L2) */
181 sr_steering_key_t classify; /**< Traffic classification */
182 u32 sr_policy; /**< SR Policy index */
183 } ip6_sr_steering_policy_t;
186 * @brief Segment Routing main datastructure
190 /* L2-input -> SR rewrite next index */
191 u32 l2_sr_policy_rewrite_index;
194 ip6_sr_sl_t *sid_lists;
197 ip6_sr_policy_t *sr_policies;
199 /* Hash table mapping BindingSID to SR policy */
200 mhash_t sr_policies_index_hash;
202 /* Pool of SR localsid instances */
203 ip6_sr_localsid_t *localsids;
205 /* Hash table mapping LOC:FUNC to SR LocalSID instance */
206 mhash_t sr_localsids_index_hash;
208 /* Pool of SR steer policies instances */
209 ip6_sr_steering_policy_t *steer_policies;
211 /* Hash table mapping steering rules to SR steer instance */
212 mhash_t sr_steer_policies_hash;
214 /* L2 steering ifaces - sr_policies */
215 u32 *sw_iface_sr_policies;
218 dpo_type_t sr_pr_spray_dpo_type;
220 /* Plugin functions */
221 sr_localsid_fn_registration_t *plugin_functions;
223 /* Find plugin function by name */
224 uword *plugin_functions_by_key;
227 vlib_combined_counter_main_t sr_ls_valid_counters;
228 vlib_combined_counter_main_t sr_ls_invalid_counters;
230 /* SR Policies FIBs */
235 vlib_main_t *vlib_main;
236 vnet_main_t *vnet_main;
239 ip6_sr_main_t sr_main;
241 extern vlib_node_registration_t sr_policy_rewrite_encaps_node;
242 extern vlib_node_registration_t sr_policy_rewrite_insert_node;
243 extern vlib_node_registration_t sr_localsid_node;
244 extern vlib_node_registration_t sr_localsid_d_node;
246 void sr_dpo_lock (dpo_id_t * dpo);
247 void sr_dpo_unlock (dpo_id_t * dpo);
249 int sr_localsid_register_function (vlib_main_t * vm, u8 * fn_name,
250 u8 * keyword_str, u8 * def_str,
251 u8 * params_str, dpo_type_t * dpo,
252 format_function_t * ls_format,
253 unformat_function_t * ls_unformat,
254 sr_plugin_callback_t * creation_fn,
255 sr_plugin_callback_t * removal_fn);
258 sr_policy_add (ip6_address_t * bsid, ip6_address_t * segments,
259 u32 weight, u8 behavior, u32 fib_table, u8 is_encap);
261 sr_policy_mod (ip6_address_t * bsid, u32 index, u32 fib_table,
262 u8 operation, ip6_address_t * segments, u32 sl_index,
264 int sr_policy_del (ip6_address_t * bsid, u32 index);
266 int sr_cli_localsid (char is_del, ip6_address_t * localsid_addr,
267 char end_psp, u8 behavior, u32 sw_if_index,
268 u32 vlan_index, u32 fib_table, ip46_address_t * nh_addr,
269 void *ls_plugin_mem);
272 sr_steering_policy (int is_del, ip6_address_t * bsid, u32 sr_policy_index,
273 u32 table_id, ip46_address_t * prefix, u32 mask_width,
274 u32 sw_if_index, u8 traffic_type);
277 * @brief SR rewrite string computation for SRH insertion (inline)
279 * @param sl is a vector of IPv6 addresses composing the Segment List
281 * @return precomputed rewrite string for SRH insertion
284 ip6_sr_compute_rewrite_string_insert (ip6_address_t * sl)
286 ip6_sr_header_t *srh;
287 ip6_address_t *addrp, *this_address;
288 u32 header_length = 0;
292 header_length += sizeof (ip6_sr_header_t);
293 header_length += (vec_len (sl) + 1) * sizeof (ip6_address_t);
295 vec_validate (rs, header_length - 1);
297 srh = (ip6_sr_header_t *) rs;
298 srh->type = ROUTING_HEADER_TYPE_SR;
299 srh->segments_left = vec_len (sl);
300 srh->first_segment = vec_len (sl);
301 srh->length = ((sizeof (ip6_sr_header_t) +
302 ((vec_len (sl) + 1) * sizeof (ip6_address_t))) / 8) - 1;
304 srh->reserved = 0x0000;
305 addrp = srh->segments + vec_len (sl);
306 vec_foreach (this_address, sl)
308 clib_memcpy (addrp->as_u8, this_address->as_u8, sizeof (ip6_address_t));
315 #endif /* included_vnet_sr_h */
318 * fd.io coding-style-patch-verification: ON
321 * eval: (c-set-style "gnu")