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.
16 * ip/ip6.h: ip6 main include file
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #ifndef included_ip_ip6_h
41 #define included_ip_ip6_h
44 #include <vlib/buffer.h>
45 #include <vnet/ethernet/packet.h>
46 #include <vnet/ip/ip6_packet.h>
47 #include <vnet/ip/ip6_hop_by_hop_packet.h>
48 #include <vnet/ip/lookup.h>
49 #include <vnet/ip/ip_feature_registration.h>
51 #include <vppinfra/bihash_24_8.h>
52 #include <vppinfra/bihash_template.h>
55 * Default size of the ip6 fib hash table
57 #define IP6_FIB_DEFAULT_HASH_NUM_BUCKETS (64 * 1024)
58 #define IP6_FIB_DEFAULT_HASH_MEMORY_SIZE (32<<20)
62 u32 dst_address_length;
67 /* Table ID (hash key) for this FIB. */
70 /* Index into FIB vector. */
73 /* flow hash configuration */
74 flow_hash_config_t flow_hash_config;
79 typedef void (ip6_add_del_interface_address_function_t)
80 (struct ip6_main_t * im,
83 ip6_address_t * address,
89 ip6_add_del_interface_address_function_t * function;
90 uword function_opaque;
91 } ip6_add_del_interface_address_callback_t;
94 * Enumeration of the FIB table instance types
96 typedef enum ip6_fib_table_instance_type_t_ {
98 * This table stores the routes that are used to forward traffic.
99 * The key is the prefix, the result the adjacnecy to forward on.
101 IP6_FIB_TABLE_FWDING,
103 * The table that stores ALL routes learned by the DP.
104 * Some of these routes may not be ready to install in forwarding
106 * The key in this table is the prefix, the result is the fib_entry_t
108 IP6_FIB_TABLE_NON_FWDING,
109 } ip6_fib_table_instance_type_t;
111 #define IP6_FIB_NUM_TABLES (IP6_FIB_TABLE_NON_FWDING+1)
114 * A represenation of a single IP6 table
116 typedef struct ip6_fib_table_instance_t_ {
118 BVT(clib_bihash) ip6_hash;
120 /* bitmap / refcounts / vector of mask widths to search */
121 uword * non_empty_dst_address_length_bitmap;
122 u8 * prefix_lengths_in_search_order;
123 i32 dst_address_length_refcounts[129];
124 } ip6_fib_table_instance_t;
126 typedef struct ip6_main_t {
128 * The two FIB tables; fwding and non-fwding
130 ip6_fib_table_instance_t ip6_table[IP6_FIB_NUM_TABLES];
132 ip_lookup_main_t lookup_main;
135 struct fib_table_t_ * fibs;
137 /* Network byte orders subnet mask for each prefix length */
138 ip6_address_t fib_masks[129];
140 /* Table index indexed by software interface. */
141 u32 * fib_index_by_sw_if_index;
143 /* IP6 enabled count by software interface */
144 u8 * ip_enabled_by_sw_if_index;
146 /* Hash table mapping table id to fib index.
147 ID space is not necessarily dense; index space is dense. */
148 uword * fib_index_by_table_id;
150 /* Hash table mapping interface rewrite adjacency index by sw if index. */
151 uword * interface_route_adj_index_by_sw_if_index;
153 /* Functions to call when interface address changes. */
154 ip6_add_del_interface_address_callback_t * add_del_interface_address_callbacks;
156 /* Template used to generate IP6 neighbor solicitation packets. */
157 vlib_packet_template_t discover_neighbor_packet_template;
159 /* ip6 lookup table config parameters */
160 u32 lookup_table_nbuckets;
161 uword lookup_table_size;
163 /* feature path configuration lists */
164 vnet_ip_feature_registration_t * next_uc_feature;
165 vnet_ip_feature_registration_t * next_mc_feature;
166 vnet_ip_feature_registration_t * next_tx_feature;
168 /* Built-in unicast feature path indices, see ip_feature_init_cast(...) */
169 u32 ip6_unicast_rx_feature_check_access;
170 u32 ip6_unicast_rx_feature_policer_classify;
171 u32 ip6_unicast_rx_feature_ipsec;
172 u32 ip6_unicast_rx_feature_l2tp_decap;
173 u32 ip6_unicast_rx_feature_vpath;
174 u32 ip6_unicast_rx_feature_lookup;
175 u32 ip6_unicast_rx_feature_drop;
177 /* Built-in multicast feature path indices */
178 u32 ip6_multicast_rx_feature_drop;
179 u32 ip6_multicast_rx_feature_vpath;
180 u32 ip6_multicast_rx_feature_lookup;
182 /* Built-in tx feature path index */
183 u32 ip6_tx_feature_interface_output;
185 /* Save results for show command */
186 char ** feature_nodes[VNET_N_IP_FEAT];
188 /* Seed for Jenkins hash used to compute ip6 flow hash. */
192 /* TTL to use for host generated packets. */
198 /* HBH processing enabled? */
202 /* Global ip6 main structure. */
203 extern ip6_main_t ip6_main;
205 #define VNET_IP6_UNICAST_FEATURE_INIT(x,...) \
206 __VA_ARGS__ vnet_ip_feature_registration_t uc_##x; \
207 static void __vnet_add_feature_registration_uc_##x (void) \
208 __attribute__((__constructor__)) ; \
209 static void __vnet_add_feature_registration_uc_##x (void) \
211 ip6_main_t * im = &ip6_main; \
212 uc_##x.next = im->next_uc_feature; \
213 im->next_uc_feature = &uc_##x; \
215 __VA_ARGS__ vnet_ip_feature_registration_t uc_##x
217 #define VNET_IP6_MULTICAST_FEATURE_INIT(x,...) \
218 __VA_ARGS__ vnet_ip_feature_registration_t mc_##x; \
219 static void __vnet_add_feature_registration_mc_##x (void) \
220 __attribute__((__constructor__)) ; \
221 static void __vnet_add_feature_registration_mc_##x (void) \
223 ip6_main_t * im = &ip6_main; \
224 mc_##x.next = im->next_mc_feature; \
225 im->next_mc_feature = &mc_##x; \
227 __VA_ARGS__ vnet_ip_feature_registration_t mc_##x
229 #define VNET_IP6_TX_FEATURE_INIT(x,...) \
230 __VA_ARGS__ vnet_ip_feature_registration_t tx_##x; \
231 static void __vnet_add_feature_registration_tx_##x (void) \
232 __attribute__((__constructor__)) ; \
233 static void __vnet_add_feature_registration_tx_##x (void) \
235 ip6_main_t * im = &ip6_main; \
236 tx_##x.next = im->next_tx_feature; \
237 im->next_tx_feature = &tx_##x; \
239 __VA_ARGS__ vnet_ip_feature_registration_t tx_##x
242 /* Global ip6 input node. Errors get attached to ip6 input node. */
243 extern vlib_node_registration_t ip6_input_node;
244 extern vlib_node_registration_t ip6_rewrite_node;
245 extern vlib_node_registration_t ip6_rewrite_local_node;
246 extern vlib_node_registration_t ip6_discover_neighbor_node;
247 extern vlib_node_registration_t ip6_glean_node;
248 extern vlib_node_registration_t ip6_midchain_node;
250 extern vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node;
252 /* ipv6 neighbor discovery - timer/event types */
255 } ip6_icmp_neighbor_discovery_event_type_t;
263 } ip6_icmp_neighbor_discovery_event_data_t;
266 ip6_destination_matches_route (const ip6_main_t * im,
267 const ip6_address_t * key,
268 const ip6_address_t * dest,
272 for (i = 0; i < ARRAY_LEN (key->as_uword); i++)
274 if ((key->as_uword[i] ^ dest->as_uword[i]) & im->fib_masks[dest_length].as_uword[i])
281 ip6_destination_matches_interface (ip6_main_t * im,
283 ip_interface_address_t * ia)
285 ip6_address_t * a = ip_interface_address_get_address (&im->lookup_main, ia);
286 return ip6_destination_matches_route (im, key, a, ia->address_length);
289 /* As above but allows for unaligned destinations (e.g. works right from IP header of packet). */
291 ip6_unaligned_destination_matches_route (ip6_main_t * im,
293 ip6_address_t * dest,
297 for (i = 0; i < ARRAY_LEN (key->as_uword); i++)
299 if ((clib_mem_unaligned (&key->as_uword[i], uword) ^ dest->as_uword[i]) & im->fib_masks[dest_length].as_uword[i])
306 ip6_src_address_for_packet (ip_lookup_main_t * lm,
311 lm->if_address_pool_index_by_sw_if_index[sw_if_index];
312 if (PREDICT_TRUE(if_add_index != ~0)) {
313 ip_interface_address_t *if_add =
314 pool_elt_at_index(lm->if_address_pool, if_add_index);
315 ip6_address_t *if_ip =
316 ip_interface_address_get_address(lm, if_add);
328 /* Find interface address which matches destination. */
329 always_inline ip6_address_t *
330 ip6_interface_address_matching_destination (ip6_main_t * im, ip6_address_t * dst, u32 sw_if_index,
331 ip_interface_address_t ** result_ia)
333 ip_lookup_main_t * lm = &im->lookup_main;
334 ip_interface_address_t * ia;
335 ip6_address_t * result = 0;
337 foreach_ip_interface_address (lm, ia, sw_if_index,
338 1 /* honor unnumbered */,
340 ip6_address_t * a = ip_interface_address_get_address (lm, ia);
341 if (ip6_destination_matches_route (im, dst, a, ia->address_length))
348 *result_ia = result ? ia : 0;
353 ip6_add_del_interface_address (vlib_main_t * vm, u32 sw_if_index,
354 ip6_address_t * address, u32 address_length,
357 ip6_sw_interface_enable_disable (u32 sw_if_index,
360 int ip6_address_compare (ip6_address_t * a1, ip6_address_t * a2);
363 ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index);
366 ip6_set_neighbor_limit (u32 neighbor_limit);
369 ip6_udp_register_listener (vlib_main_t * vm,
371 u32 next_node_index);
373 u16 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, ip6_header_t * ip0, int *bogus_lengthp);
375 void ip6_register_protocol (u32 protocol, u32 node_index);
377 serialize_function_t serialize_vnet_ip6_main, unserialize_vnet_ip6_main;
380 vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
383 u8 * link_layer_address,
384 uword n_bytes_link_layer_address,
387 vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
390 u8 * link_layer_address,
391 uword n_bytes_link_layer_address);
394 ip6_link_local_address_from_ethernet_mac_address (ip6_address_t *ip,
398 ip6_ethernet_mac_address_from_link_local_address (u8 *mac,
401 int vnet_set_ip6_flow_hash (u32 table_id,
402 flow_hash_config_t flow_hash_config);
405 ip6_neighbor_ra_config(vlib_main_t * vm, u32 sw_if_index,
406 u8 suppress, u8 managed, u8 other,
407 u8 ll_option, u8 send_unicast, u8 cease,
408 u8 use_lifetime, u32 lifetime,
409 u32 initial_count, u32 initial_interval,
410 u32 max_interval, u32 min_interval,
414 ip6_neighbor_ra_prefix(vlib_main_t * vm, u32 sw_if_index,
415 ip6_address_t *prefix_addr, u8 prefix_len,
416 u8 use_default, u32 val_lifetime, u32 pref_lifetime,
417 u8 no_advertise, u8 off_link, u8 no_autoconfig, u8 no_onlink,
422 enable_ip6_interface(vlib_main_t * vm,
426 disable_ip6_interface(vlib_main_t * vm,
430 ip6_interface_enabled(vlib_main_t * vm,
434 set_ip6_link_local_address(vlib_main_t * vm,
436 ip6_address_t *address,
439 void vnet_register_ip6_neighbor_resolution_event(vnet_main_t * vnm,
445 int vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
446 void * data_callback,
454 int vnet_ip6_nd_term (vlib_main_t * vm,
455 vlib_node_runtime_t * node,
457 ethernet_header_t * eth,
463 int vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
465 extern vlib_node_registration_t ip6_lookup_node;
467 /* Compute flow hash. We'll use it to select which Sponge to use for this
468 flow. And other things. */
470 ip6_compute_flow_hash (const ip6_header_t * ip,
471 flow_hash_config_t flow_hash_config)
473 tcp_header_t * tcp = (void *) (ip + 1);
476 uword is_tcp_udp = (ip->protocol == IP_PROTOCOL_TCP
477 || ip->protocol == IP_PROTOCOL_UDP);
479 t1 = (ip->src_address.as_u64[0] ^ ip->src_address.as_u64[1]);
480 t1 = (flow_hash_config & IP_FLOW_HASH_SRC_ADDR) ? t1 : 0;
482 t2 = (ip->dst_address.as_u64[0] ^ ip->dst_address.as_u64[1]);
483 t2 = (flow_hash_config & IP_FLOW_HASH_DST_ADDR) ? t2 : 0;
485 a = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t2 : t1;
486 b = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t1 : t2;
487 b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? ip->protocol : 0;
489 t1 = is_tcp_udp ? tcp->ports.src : 0;
490 t2 = is_tcp_udp ? tcp->ports.dst : 0;
492 t1 = (flow_hash_config & IP_FLOW_HASH_SRC_PORT) ? t1 : 0;
493 t2 = (flow_hash_config & IP_FLOW_HASH_DST_PORT) ? t2 : 0;
495 c = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ?
496 ((t1<<16) | t2) : ((t2<<16) | t1);
498 hash_mix64 (a, b, c);
503 * Hop-by-Hop handling
506 /* Array of function pointers to HBH option handling routines */
507 int (*options[256])(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt);
508 u8 *(*trace[256])(u8 *s, ip6_hop_by_hop_option_t *opt);
510 } ip6_hop_by_hop_main_t;
512 extern ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
514 int ip6_hbh_register_option (u8 option,
515 int options(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt),
516 u8 *trace(u8 *s, ip6_hop_by_hop_option_t *opt));
517 int ip6_hbh_unregister_option (u8 option);
518 void ip6_hbh_set_next_override (uword next);
520 /* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
523 #endif /* included_ip_ip6_h */