2 * sr_localsid.c: ipv6 segment routing Endpoint behaviors
4 * Copyright (c) 2016 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
20 * @brief Processing of packets with a SRH
22 * CLI to define new Segment Routing End processing functions.
23 * Graph node to support such functions.
25 * Each function associates an SRv6 segment (IPv6 address) with an specific
26 * Segment Routing function.
30 #include <vlib/vlib.h>
31 #include <vnet/vnet.h>
32 #include <vnet/srv6/sr.h>
33 #include <vnet/ip/ip.h>
34 #include <vnet/srv6/sr_packet.h>
35 #include <vnet/ip/ip6_packet.h>
36 #include <vnet/fib/ip6_fib.h>
37 #include <vnet/dpo/dpo.h>
38 #include <vnet/adj/adj.h>
40 #include <vppinfra/error.h>
41 #include <vppinfra/elog.h>
44 * @brief Dynamically added SR localsid DPO type
46 static dpo_type_t sr_localsid_dpo_type;
47 static dpo_type_t sr_localsid_d_dpo_type;
50 * @brief SR localsid add/del
52 * Function to add or delete SR LocalSIDs.
54 * @param is_del Boolean of whether its a delete instruction
55 * @param localsid_addr IPv6 address of the localsid
56 * @param is_decap Boolean of whether decapsulation is allowed in this function
57 * @param behavior Type of behavior (function) for this localsid
58 * @param sw_if_index Only for L2/L3 xconnect. OIF. In VRF variant the fib_table.
59 * @param vlan_index Only for L2 xconnect. Outgoing VLAN tag.
60 * @param fib_table FIB table in which we should install the localsid entry
61 * @param nh_addr Next Hop IPv4/IPv6 address. Only for L2/L3 xconnect.
63 * @return 0 on success, error otherwise.
66 sr_cli_localsid (char is_del, ip6_address_t * localsid_addr, u16 prefixlen,
67 char end_psp, u8 behavior, u32 sw_if_index, u32 vlan_index,
68 u32 fib_table, ip46_address_t * nh_addr, void *ls_plugin_mem)
70 ip6_sr_main_t *sm = &sr_main;
74 sr_localsid_fn_registration_t *plugin = 0;
76 ip6_sr_localsid_t *ls = 0;
78 dpo_id_t dpo = DPO_INVALID;
80 /* Search for the item */
81 p = mhash_get (&sm->sr_localsids_index_hash, localsid_addr);
87 /* Retrieve localsid */
88 ls = pool_elt_at_index (sm->localsids, p[0]);
89 if (ls->behavior >= SR_BEHAVIOR_LAST)
91 plugin = pool_elt_at_index (sm->plugin_functions,
92 ls->behavior - SR_BEHAVIOR_LAST);
93 pref_length = plugin->prefix_length;
98 pref_length = prefixlen;
101 /* Delete FIB entry */
103 .fp_proto = FIB_PROTOCOL_IP6,
104 .fp_len = pref_length,
106 .ip6 = *localsid_addr,
110 fib_table_entry_delete (fib_table_find
111 (FIB_PROTOCOL_IP6, fib_table), &pfx,
114 /* In case it is a Xconnect iface remove the (OIF, NHOP) adj */
115 if (ls->behavior == SR_BEHAVIOR_X || ls->behavior == SR_BEHAVIOR_DX6
116 || ls->behavior == SR_BEHAVIOR_DX4)
117 adj_unlock (ls->nh_adj);
119 if (ls->behavior >= SR_BEHAVIOR_LAST)
121 /* Callback plugin removal function */
122 rv = plugin->removal (ls);
125 /* Delete localsid registry */
126 pool_put (sm->localsids, ls);
127 mhash_unset (&sm->sr_localsids_index_hash, localsid_addr, NULL);
130 else /* create with function already existing; complain */
134 /* delete; localsid does not exist; complain */
138 if (behavior >= SR_BEHAVIOR_LAST)
140 sr_localsid_fn_registration_t *plugin = 0;
142 pool_elt_at_index (sm->plugin_functions, behavior - SR_BEHAVIOR_LAST);
143 pref_length = plugin->prefix_length;
146 /* Check whether there exists a FIB entry with such address */
148 .fp_proto = FIB_PROTOCOL_IP6,
149 .fp_len = pref_length,
152 pfx.fp_addr.as_u64[0] = localsid_addr->as_u64[0];
153 pfx.fp_addr.as_u64[1] = localsid_addr->as_u64[1];
157 pfx.fp_len = prefixlen;
160 /* Lookup the FIB index associated to the table id provided */
161 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP6, fib_table);
165 /* Lookup the localsid in such FIB table */
166 fib_node_index_t fei = fib_table_lookup_exact_match (fib_index, &pfx);
167 if (FIB_NODE_INDEX_INVALID != fei)
168 return -4; //There is an entry for such address (the localsid addr)
170 /* Create a new localsid registry */
171 pool_get (sm->localsids, ls);
172 clib_memset (ls, 0, sizeof (*ls));
174 clib_memcpy (&ls->localsid, localsid_addr, sizeof (ip6_address_t));
175 ls->end_psp = end_psp;
176 ls->behavior = behavior;
177 ls->nh_adj = (u32) ~ 0;
178 ls->fib_table = fib_table;
179 ls->localsid_len = pfx.fp_len;
182 case SR_BEHAVIOR_END:
185 ls->sw_if_index = sw_if_index;
186 clib_memcpy (&ls->next_hop.ip6, &nh_addr->ip6, sizeof (ip6_address_t));
189 ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP6, sw_if_index);
191 case SR_BEHAVIOR_DX4:
192 ls->sw_if_index = sw_if_index;
193 clib_memcpy (&ls->next_hop.ip4, &nh_addr->ip4, sizeof (ip4_address_t));
195 case SR_BEHAVIOR_DX6:
196 ls->sw_if_index = sw_if_index;
197 clib_memcpy (&ls->next_hop.ip6, &nh_addr->ip6, sizeof (ip6_address_t));
199 case SR_BEHAVIOR_DT6:
200 ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP6, sw_if_index);
202 case SR_BEHAVIOR_DT4:
203 ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP4, sw_if_index);
205 case SR_BEHAVIOR_DX2:
206 ls->sw_if_index = sw_if_index;
207 ls->vlan_index = vlan_index;
211 /* Figure out the adjacency magic for Xconnect variants */
212 if (ls->behavior == SR_BEHAVIOR_X || ls->behavior == SR_BEHAVIOR_DX4
213 || ls->behavior == SR_BEHAVIOR_DX6)
215 adj_index_t nh_adj_index = ADJ_INDEX_INVALID;
217 /* Retrieve the adjacency corresponding to the (OIF, next_hop) */
218 if (ls->behavior == SR_BEHAVIOR_DX6 || ls->behavior == SR_BEHAVIOR_X)
219 nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6,
220 nh_addr, sw_if_index);
222 else if (ls->behavior == SR_BEHAVIOR_DX4)
223 nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, VNET_LINK_IP4,
224 nh_addr, sw_if_index);
226 /* Check for ADJ creation error. If so panic */
227 if (nh_adj_index == ADJ_INDEX_INVALID)
229 pool_put (sm->localsids, ls);
233 ls->nh_adj = nh_adj_index;
237 if (ls->behavior == SR_BEHAVIOR_END || ls->behavior == SR_BEHAVIOR_X
238 || ls->behavior == SR_BEHAVIOR_T)
239 dpo_set (&dpo, sr_localsid_dpo_type, DPO_PROTO_IP6, ls - sm->localsids);
240 else if (ls->behavior > SR_BEHAVIOR_D_FIRST
241 && ls->behavior < SR_BEHAVIOR_LAST)
242 dpo_set (&dpo, sr_localsid_d_dpo_type, DPO_PROTO_IP6, ls - sm->localsids);
243 else if (ls->behavior >= SR_BEHAVIOR_LAST)
245 sr_localsid_fn_registration_t *plugin = 0;
246 plugin = pool_elt_at_index (sm->plugin_functions,
247 ls->behavior - SR_BEHAVIOR_LAST);
248 /* Copy the unformat memory result */
249 ls->plugin_mem = ls_plugin_mem;
250 /* Callback plugin creation function */
251 rv = plugin->creation (ls);
254 pool_put (sm->localsids, ls);
257 dpo_set (&dpo, plugin->dpo, DPO_PROTO_IP6, ls - sm->localsids);
260 /* Set hash key for searching localsid by address */
261 mhash_set (&sm->sr_localsids_index_hash, localsid_addr, ls - sm->localsids,
264 fib_table_entry_special_dpo_add (fib_index, &pfx, FIB_SOURCE_SR,
265 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
268 /* Set counter to zero */
269 vlib_validate_combined_counter (&(sm->sr_ls_valid_counters),
271 vlib_validate_combined_counter (&(sm->sr_ls_invalid_counters),
274 vlib_zero_combined_counter (&(sm->sr_ls_valid_counters),
276 vlib_zero_combined_counter (&(sm->sr_ls_invalid_counters),
283 * @brief SR LocalSID CLI function.
285 * @see sr_cli_localsid
287 static clib_error_t *
288 sr_cli_localsid_command_fn (vlib_main_t * vm, unformat_input_t * input,
289 vlib_cli_command_t * cmd)
291 vnet_main_t *vnm = vnet_get_main ();
292 ip6_sr_main_t *sm = &sr_main;
293 u32 sw_if_index = (u32) ~ 0, vlan_index = (u32) ~ 0, fib_index = 0;
297 ip6_address_t resulting_address;
298 ip46_address_t next_hop;
299 char address_set = 0;
301 void *ls_plugin_mem = 0;
305 clib_memset (&resulting_address, 0, sizeof (ip6_address_t));
306 ip46_address_reset (&next_hop);
308 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
310 if (unformat (input, "del"))
312 else if (!address_set
313 && unformat (input, "address %U", unformat_ip6_address,
316 else if (!address_set
317 && unformat (input, "prefix %U/%d", unformat_ip6_address,
318 &resulting_address, &prefix_len))
320 else if (!address_set
321 && unformat (input, "addr %U", unformat_ip6_address,
324 else if (unformat (input, "fib-table %u", &fib_index));
325 else if (vlan_index == (u32) ~ 0
326 && unformat (input, "vlan %u", &vlan_index));
327 else if (!behavior && unformat (input, "behavior"))
329 if (unformat (input, "end.x %U %U",
330 unformat_vnet_sw_interface, vnm, &sw_if_index,
331 unformat_ip6_address, &next_hop.ip6))
332 behavior = SR_BEHAVIOR_X;
333 else if (unformat (input, "end.t %u", &sw_if_index))
334 behavior = SR_BEHAVIOR_T;
335 else if (unformat (input, "end.dx6 %U %U",
336 unformat_vnet_sw_interface, vnm, &sw_if_index,
337 unformat_ip6_address, &next_hop.ip6))
338 behavior = SR_BEHAVIOR_DX6;
339 else if (unformat (input, "end.dx4 %U %U",
340 unformat_vnet_sw_interface, vnm, &sw_if_index,
341 unformat_ip4_address, &next_hop.ip4))
342 behavior = SR_BEHAVIOR_DX4;
343 else if (unformat (input, "end.dx2 %U",
344 unformat_vnet_sw_interface, vnm, &sw_if_index))
345 behavior = SR_BEHAVIOR_DX2;
346 else if (unformat (input, "end.dt6 %u", &sw_if_index))
347 behavior = SR_BEHAVIOR_DT6;
348 else if (unformat (input, "end.dt4 %u", &sw_if_index))
349 behavior = SR_BEHAVIOR_DT4;
352 /* Loop over all the plugin behavior format functions */
353 sr_localsid_fn_registration_t *plugin = 0, **vec_plugins = 0;
354 sr_localsid_fn_registration_t **plugin_it = 0;
356 /* Create a vector out of the plugin pool as recommended */
358 pool_foreach (plugin, sm->plugin_functions,
360 vec_add1 (vec_plugins, plugin);
364 vec_foreach (plugin_it, vec_plugins)
367 (input, "%U", (*plugin_it)->ls_unformat, &ls_plugin_mem))
369 behavior = (*plugin_it)->sr_localsid_function_number;
377 if (unformat (input, "end"))
378 behavior = SR_BEHAVIOR_END;
383 else if (!end_psp && unformat (input, "psp"))
389 if (!behavior && end_psp)
390 behavior = SR_BEHAVIOR_END;
393 return clib_error_return (0,
394 "Error: SRv6 LocalSID address is mandatory.");
395 if (!is_del && !behavior)
396 return clib_error_return (0,
397 "Error: SRv6 LocalSID behavior is mandatory.");
398 if (vlan_index != (u32) ~ 0)
399 return clib_error_return (0,
400 "Error: SRv6 End.DX2 with rewrite VLAN tag not supported by now.");
401 if (end_psp && !(behavior == SR_BEHAVIOR_END || behavior == SR_BEHAVIOR_X))
402 return clib_error_return (0,
403 "Error: SRv6 PSP only compatible with End and End.X");
406 sr_cli_localsid (is_del, &resulting_address, prefix_len, end_psp,
407 behavior, sw_if_index, vlan_index, fib_index, &next_hop,
417 return clib_error_return (0,
418 "Identical localsid already exists. Requested localsid not created.");
420 return clib_error_return (0,
421 "The requested localsid could not be deleted. SR localsid not found");
423 return clib_error_return (0, "FIB table %u does not exist", fib_index);
425 return clib_error_return (0, "There is already one FIB entry for the"
426 "requested localsid non segment routing related");
428 return clib_error_return (0,
429 "Could not create ARP/ND entry for such next_hop. Internal error.");
431 return clib_error_return (0,
432 "Error on the plugin based localsid creation.");
434 return clib_error_return (0, "BUG: sr localsid returns %d", rv);
440 VLIB_CLI_COMMAND (sr_localsid_command, static) = {
441 .path = "sr localsid",
442 .short_help = "sr localsid (del) address XX:XX::YY:YY"
443 "(fib-table 8) behavior STRING",
445 "Create SR LocalSID and binds it to a particular behavior\n"
447 "\tlocalSID IPv6_addr(128b) LocalSID IPv6 address\n"
448 "\t(fib-table X) Optional. VRF where to install SRv6 localsid\n"
449 "\tbehavior STRING Specifies the behavior\n"
451 "\tEnd\t-> Endpoint.\n"
452 "\tEnd.X\t-> Endpoint with decapsulation and Layer-3 cross-connect.\n"
453 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
454 "\tEnd.DX2\t-> Endpoint with decapsulation and Layer-2 cross-connect.\n"
455 "\t\tParameters: '<iface>'\n"
456 "\tEnd.DX6\t-> Endpoint with decapsulation and IPv6 cross-connect.\n"
457 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
458 "\tEnd.DX4\t-> Endpoint with decapsulation and IPv4 cross-connect.\n"
459 "\t\tParameters: '<iface> <ip4_next_hop>'\n"
460 "\tEnd.DT6\t-> Endpoint with decapsulation and specific IPv6 table lookup.\n"
461 "\t\tParameters: '<ip6_fib_table>'\n"
462 "\tEnd.DT4\t-> Endpoint with decapsulation and specific IPv4 table lookup.\n"
463 "\t\tParameters: '<ip4_fib_table>'\n",
464 .function = sr_cli_localsid_command_fn,
469 * @brief CLI function to 'show' all SR LocalSIDs on console.
471 static clib_error_t *
472 show_sr_localsid_command_fn (vlib_main_t * vm, unformat_input_t * input,
473 vlib_cli_command_t * cmd)
475 vnet_main_t *vnm = vnet_get_main ();
476 ip6_sr_main_t *sm = &sr_main;
477 ip6_sr_localsid_t **localsid_list = 0;
478 ip6_sr_localsid_t *ls;
481 vlib_cli_output (vm, "SRv6 - My LocalSID Table:");
482 vlib_cli_output (vm, "=========================");
484 pool_foreach (ls, sm->localsids, ({ vec_add1 (localsid_list, ls); }));
486 for (i = 0; i < vec_len (localsid_list); i++)
488 ls = localsid_list[i];
489 switch (ls->behavior)
491 case SR_BEHAVIOR_END:
492 vlib_cli_output (vm, "\tAddress: \t%U\n\tBehavior: \tEnd",
493 format_ip6_address, &ls->localsid);
497 "\tAddress: \t%U\n\tBehavior: \tX (Endpoint with Layer-3 cross-connect)"
498 "\n\tIface: \t%U\n\tNext hop: \t%U",
499 format_ip6_address, &ls->localsid,
500 format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
501 format_ip6_address, &ls->next_hop.ip6);
505 "\tAddress: \t%U\n\tBehavior: \tT (Endpoint with specific IPv6 table lookup)"
507 format_ip6_address, &ls->localsid, ls->vrf_index);
509 case SR_BEHAVIOR_DX4:
511 "\tAddress: \t%U\n\tBehavior: \tDX4 (Endpoint with decapsulation and IPv4 cross-connect)"
512 "\n\tIface: \t%U\n\tNext hop: \t%U",
513 format_ip6_address, &ls->localsid,
514 format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
515 format_ip4_address, &ls->next_hop.ip4);
517 case SR_BEHAVIOR_DX6:
519 "\tAddress: \t%U\n\tBehavior: \tDX6 (Endpoint with decapsulation and IPv6 cross-connect)"
520 "\n\tIface: \t%U\n\tNext hop: \t%U",
521 format_ip6_address, &ls->localsid,
522 format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
523 format_ip6_address, &ls->next_hop.ip6);
525 case SR_BEHAVIOR_DX2:
526 if (ls->vlan_index == (u32) ~ 0)
528 "\tAddress: \t%U\n\tBehavior: \tDX2 (Endpoint with decapulation and Layer-2 cross-connect)"
529 "\n\tIface: \t%U", format_ip6_address,
530 &ls->localsid, format_vnet_sw_if_index_name, vnm,
534 "Unsupported yet. (DX2 with egress VLAN rewrite)");
536 case SR_BEHAVIOR_DT6:
538 "\tAddress: \t%U\n\tBehavior: \tDT6 (Endpoint with decapsulation and specific IPv6 table lookup)"
539 "\n\tTable: %u", format_ip6_address, &ls->localsid,
542 case SR_BEHAVIOR_DT4:
544 "\tAddress: \t%U\n\tBehavior: \tDT4 (Endpoint with decapsulation and specific IPv4 table lookup)"
545 "\n\tTable: \t%u", format_ip6_address,
546 &ls->localsid, ls->vrf_index);
549 if (ls->behavior >= SR_BEHAVIOR_LAST)
551 sr_localsid_fn_registration_t *plugin =
552 pool_elt_at_index (sm->plugin_functions,
553 ls->behavior - SR_BEHAVIOR_LAST);
555 vlib_cli_output (vm, "\tAddress: \t%U\n"
556 "\tBehavior: \t%s (%s)\n\t%U",
557 format_ip6_address, &ls->localsid,
558 plugin->keyword_str, plugin->def_str,
559 plugin->ls_format, ls->plugin_mem);
562 //Should never get here...
563 vlib_cli_output (vm, "Internal error");
567 vlib_cli_output (vm, "\tPSP: \tTrue\n");
570 vlib_counter_t valid, invalid;
571 vlib_get_combined_counter (&(sm->sr_ls_valid_counters), i, &valid);
572 vlib_get_combined_counter (&(sm->sr_ls_invalid_counters), i, &invalid);
573 vlib_cli_output (vm, "\tGood traffic: \t[%Ld packets : %Ld bytes]\n",
574 valid.packets, valid.bytes);
575 vlib_cli_output (vm, "\tBad traffic: \t[%Ld packets : %Ld bytes]\n",
576 invalid.packets, invalid.bytes);
577 vlib_cli_output (vm, "--------------------");
583 VLIB_CLI_COMMAND (show_sr_localsid_command, static) = {
584 .path = "show sr localsids",
585 .short_help = "show sr localsids",
586 .function = show_sr_localsid_command_fn,
591 * @brief Function to 'clear' ALL SR localsid counters
593 static clib_error_t *
594 clear_sr_localsid_counters_command_fn (vlib_main_t * vm,
595 unformat_input_t * input,
596 vlib_cli_command_t * cmd)
598 ip6_sr_main_t *sm = &sr_main;
600 vlib_clear_combined_counters (&(sm->sr_ls_valid_counters));
601 vlib_clear_combined_counters (&(sm->sr_ls_invalid_counters));
607 VLIB_CLI_COMMAND (clear_sr_localsid_counters_command, static) = {
608 .path = "clear sr localsid-counters",
609 .short_help = "clear sr localsid-counters",
610 .function = clear_sr_localsid_counters_command_fn,
614 /************************ SR LocalSID graphs node ****************************/
616 * @brief SR localsid node trace
620 ip6_address_t localsid;
625 } sr_localsid_trace_t;
627 #define foreach_sr_localsid_error \
628 _(NO_INNER_HEADER, "(SR-Error) No inner IP header") \
629 _(NO_MORE_SEGMENTS, "(SR-Error) No more segments") \
630 _(NO_SRH, "(SR-Error) No SR header") \
631 _(NO_PSP, "(SR-Error) PSP Not available (segments left > 0)") \
632 _(NOT_LS, "(SR-Error) Decaps not available (segments left > 0)") \
633 _(L2, "(SR-Error) SRv6 decapsulated a L2 frame without dest")
637 #define _(sym,str) SR_LOCALSID_ERROR_##sym,
638 foreach_sr_localsid_error
641 } sr_localsid_error_t;
643 static char *sr_localsid_error_strings[] = {
644 #define _(sym,string) string,
645 foreach_sr_localsid_error
649 #define foreach_sr_localsid_next \
650 _(ERROR, "error-drop") \
651 _(IP6_LOOKUP, "ip6-lookup") \
652 _(IP4_LOOKUP, "ip4-lookup") \
653 _(IP6_REWRITE, "ip6-rewrite") \
654 _(IP4_REWRITE, "ip4-rewrite") \
655 _(INTERFACE_OUTPUT, "interface-output")
659 #define _(s,n) SR_LOCALSID_NEXT_##s,
660 foreach_sr_localsid_next
663 } sr_localsid_next_t;
666 * @brief SR LocalSID graph node trace function
671 format_sr_localsid_trace (u8 * s, va_list * args)
673 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
674 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
675 sr_localsid_trace_t *t = va_arg (*args, sr_localsid_trace_t *);
678 format (s, "SR-LOCALSID:\n\tLocalsid: %U\n", format_ip6_address,
682 case SR_BEHAVIOR_END:
683 s = format (s, "\tBehavior: End\n");
685 case SR_BEHAVIOR_DX6:
686 s = format (s, "\tBehavior: Decapsulation with IPv6 L3 xconnect\n");
688 case SR_BEHAVIOR_DX4:
689 s = format (s, "\tBehavior: Decapsulation with IPv4 L3 xconnect\n");
692 s = format (s, "\tBehavior: IPv6 L3 xconnect\n");
695 s = format (s, "\tBehavior: IPv6 specific table lookup\n");
697 case SR_BEHAVIOR_DT6:
698 s = format (s, "\tBehavior: Decapsulation with IPv6 Table lookup\n");
700 case SR_BEHAVIOR_DT4:
701 s = format (s, "\tBehavior: Decapsulation with IPv4 Table lookup\n");
703 case SR_BEHAVIOR_DX2:
704 s = format (s, "\tBehavior: Decapsulation with L2 xconnect\n");
707 s = format (s, "\tBehavior: defined in plugin\n"); //TODO
710 if (t->num_segments != 0xFF)
712 if (t->num_segments > 0)
714 s = format (s, "\tSegments left: %d\n", t->segments_left);
715 s = format (s, "\tSID list: [in ietf order]");
717 for (i = 0; i < t->num_segments; i++)
719 s = format (s, "\n\t-> %U", format_ip6_address,
720 (ip6_address_t *) & t->sr[i *
721 sizeof (ip6_address_t)]);
729 * @brief Function doing End processing.
731 static_always_inline void
732 end_srh_processing (vlib_node_runtime_t * node,
735 ip6_sr_header_t * sr0,
736 ip6_sr_localsid_t * ls0,
737 u32 * next0, u8 psp, ip6_ext_header_t * prev0)
739 ip6_address_t *new_dst0;
741 if (PREDICT_TRUE (sr0->type == ROUTING_HEADER_TYPE_SR))
743 if (sr0->segments_left == 1 && psp)
746 u64 *copy_dst0, *copy_src0;
747 u32 copy_len_u64s0 = 0;
749 ip0->dst_address.as_u64[0] = sr0->segments->as_u64[0];
750 ip0->dst_address.as_u64[1] = sr0->segments->as_u64[1];
752 /* Remove the SRH taking care of the rest of IPv6 ext header */
754 prev0->next_hdr = sr0->protocol;
756 ip0->protocol = sr0->protocol;
758 sr_len = ip6_ext_header_len (sr0);
759 vlib_buffer_advance (b0, sr_len);
760 new_l0 = clib_net_to_host_u16 (ip0->payload_length) - sr_len;
761 ip0->payload_length = clib_host_to_net_u16 (new_l0);
762 copy_src0 = (u64 *) ip0;
763 copy_dst0 = copy_src0 + (sr0->length + 1);
764 /* number of 8 octet units to copy
765 * By default in absence of extension headers it is equal to length of ip6 header
766 * With extension headers it number of 8 octet units of ext headers preceding
770 (((u8 *) sr0 - (u8 *) ip0) - sizeof (ip6_header_t)) >> 3;
771 copy_dst0[4 + copy_len_u64s0] = copy_src0[4 + copy_len_u64s0];
772 copy_dst0[3 + copy_len_u64s0] = copy_src0[3 + copy_len_u64s0];
773 copy_dst0[2 + copy_len_u64s0] = copy_src0[2 + copy_len_u64s0];
774 copy_dst0[1 + copy_len_u64s0] = copy_src0[1 + copy_len_u64s0];
775 copy_dst0[0 + copy_len_u64s0] = copy_src0[0 + copy_len_u64s0];
778 for (i = copy_len_u64s0 - 1; i >= 0; i--)
780 copy_dst0[i] = copy_src0[i];
783 if (ls0->behavior == SR_BEHAVIOR_X)
785 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
786 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
788 else if (ls0->behavior == SR_BEHAVIOR_T)
790 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
793 else if (PREDICT_TRUE (sr0->segments_left > 0))
795 sr0->segments_left -= 1;
796 new_dst0 = (ip6_address_t *) (sr0->segments);
797 new_dst0 += sr0->segments_left;
798 ip0->dst_address.as_u64[0] = new_dst0->as_u64[0];
799 ip0->dst_address.as_u64[1] = new_dst0->as_u64[1];
801 if (ls0->behavior == SR_BEHAVIOR_X)
803 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
804 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
806 else if (ls0->behavior == SR_BEHAVIOR_T)
808 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
813 *next0 = SR_LOCALSID_NEXT_ERROR;
814 b0->error = node->errors[SR_LOCALSID_ERROR_NO_MORE_SEGMENTS];
819 /* Error. Routing header of type != SR */
820 *next0 = SR_LOCALSID_NEXT_ERROR;
821 b0->error = node->errors[SR_LOCALSID_ERROR_NO_SRH];
826 * @brief Function doing SRH processing for D* variants
828 static_always_inline void
829 end_decaps_srh_processing (vlib_node_runtime_t * node,
832 ip6_sr_header_t * sr0,
833 ip6_sr_localsid_t * ls0, u32 * next0)
835 /* Compute the size of the IPv6 header with all Ext. headers */
837 ip6_ext_header_t *next_ext_header;
840 next_proto = ip0->protocol;
841 next_ext_header = (void *) (ip0 + 1);
842 total_size = sizeof (ip6_header_t);
843 while (ip6_ext_hdr (next_proto))
845 total_size += ip6_ext_header_len (next_ext_header);
846 next_proto = next_ext_header->next_hdr;
847 next_ext_header = ip6_ext_next_header (next_ext_header);
850 /* Ensure this is the last segment. Otherwise drop. */
851 if (sr0 && sr0->segments_left != 0)
853 *next0 = SR_LOCALSID_NEXT_ERROR;
854 b0->error = node->errors[SR_LOCALSID_ERROR_NOT_LS];
860 case IP_PROTOCOL_IPV6:
861 /* Encap-End IPv6. Pop outer IPv6 header. */
862 if (ls0->behavior == SR_BEHAVIOR_DX6)
864 vlib_buffer_advance (b0, total_size);
865 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
866 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
869 else if (ls0->behavior == SR_BEHAVIOR_DT6)
871 vlib_buffer_advance (b0, total_size);
872 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
876 case IP_PROTOCOL_IP_IN_IP:
877 /* Encap-End IPv4. Pop outer IPv6 header */
878 if (ls0->behavior == SR_BEHAVIOR_DX4)
880 vlib_buffer_advance (b0, total_size);
881 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
882 *next0 = SR_LOCALSID_NEXT_IP4_REWRITE;
885 else if (ls0->behavior == SR_BEHAVIOR_DT4)
887 vlib_buffer_advance (b0, total_size);
888 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
889 *next0 = SR_LOCALSID_NEXT_IP4_LOOKUP;
893 case IP_PROTOCOL_IP6_NONXT:
895 if (ls0->behavior == SR_BEHAVIOR_DX2)
897 vlib_buffer_advance (b0, total_size);
898 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->sw_if_index;
899 *next0 = SR_LOCALSID_NEXT_INTERFACE_OUTPUT;
904 *next0 = SR_LOCALSID_NEXT_ERROR;
905 b0->error = node->errors[SR_LOCALSID_ERROR_NO_INNER_HEADER];
910 * @brief SR LocalSID graph node. Supports all default SR Endpoint variants with decaps
913 sr_localsid_d_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
914 vlib_frame_t * from_frame)
916 u32 n_left_from, next_index, *from, *to_next;
917 ip6_sr_main_t *sm = &sr_main;
918 from = vlib_frame_vector_args (from_frame);
919 n_left_from = from_frame->n_vectors;
920 next_index = node->cached_next_index;
921 u32 thread_index = vm->thread_index;
923 while (n_left_from > 0)
926 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
929 while (n_left_from >= 8 && n_left_to_next >= 4)
931 u32 bi0, bi1, bi2, bi3;
932 vlib_buffer_t *b0, *b1, *b2, *b3;
933 ip6_header_t *ip0, *ip1, *ip2, *ip3;
934 ip6_sr_header_t *sr0, *sr1, *sr2, *sr3;
935 u32 next0, next1, next2, next3;
936 next0 = next1 = next2 = next3 = SR_LOCALSID_NEXT_IP6_LOOKUP;
937 ip6_sr_localsid_t *ls0, *ls1, *ls2, *ls3;
939 /* Prefetch next iteration. */
941 vlib_buffer_t *p4, *p5, *p6, *p7;
943 p4 = vlib_get_buffer (vm, from[4]);
944 p5 = vlib_get_buffer (vm, from[5]);
945 p6 = vlib_get_buffer (vm, from[6]);
946 p7 = vlib_get_buffer (vm, from[7]);
948 /* Prefetch the buffer header and packet for the N+4 loop iteration */
949 vlib_prefetch_buffer_header (p4, LOAD);
950 vlib_prefetch_buffer_header (p5, LOAD);
951 vlib_prefetch_buffer_header (p6, LOAD);
952 vlib_prefetch_buffer_header (p7, LOAD);
954 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
955 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
956 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
957 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
960 to_next[0] = bi0 = from[0];
961 to_next[1] = bi1 = from[1];
962 to_next[2] = bi2 = from[2];
963 to_next[3] = bi3 = from[3];
969 b0 = vlib_get_buffer (vm, bi0);
970 b1 = vlib_get_buffer (vm, bi1);
971 b2 = vlib_get_buffer (vm, bi2);
972 b3 = vlib_get_buffer (vm, bi3);
975 pool_elt_at_index (sm->localsids,
976 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
978 pool_elt_at_index (sm->localsids,
979 vnet_buffer (b1)->ip.adj_index[VLIB_TX]);
981 pool_elt_at_index (sm->localsids,
982 vnet_buffer (b2)->ip.adj_index[VLIB_TX]);
984 pool_elt_at_index (sm->localsids,
985 vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
987 ip0 = vlib_buffer_get_current (b0);
988 ip1 = vlib_buffer_get_current (b1);
989 ip2 = vlib_buffer_get_current (b2);
990 ip3 = vlib_buffer_get_current (b3);
993 ip6_ext_header_find (vm, b0, ip0, IP_PROTOCOL_IPV6_ROUTE, NULL);
995 ip6_ext_header_find (vm, b1, ip1, IP_PROTOCOL_IPV6_ROUTE, NULL);
997 ip6_ext_header_find (vm, b2, ip2, IP_PROTOCOL_IPV6_ROUTE, NULL);
999 ip6_ext_header_find (vm, b3, ip3, IP_PROTOCOL_IPV6_ROUTE, NULL);
1001 end_decaps_srh_processing (node, b0, ip0, sr0, ls0, &next0);
1002 end_decaps_srh_processing (node, b1, ip1, sr1, ls1, &next1);
1003 end_decaps_srh_processing (node, b2, ip2, sr2, ls2, &next2);
1004 end_decaps_srh_processing (node, b3, ip3, sr3, ls3, &next3);
1006 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1008 sr_localsid_trace_t *tr =
1009 vlib_add_trace (vm, node, b0, sizeof (*tr));
1010 tr->num_segments = 0;
1011 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1012 sizeof (tr->localsid.as_u8));
1013 tr->behavior = ls0->behavior;
1014 if (ip0 == vlib_buffer_get_current (b0))
1016 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1017 && sr0->type == ROUTING_HEADER_TYPE_SR)
1019 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1021 sr0->length * 8 / sizeof (ip6_address_t);
1022 tr->segments_left = sr0->segments_left;
1026 tr->num_segments = 0xFF;
1029 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
1031 sr_localsid_trace_t *tr =
1032 vlib_add_trace (vm, node, b1, sizeof (*tr));
1033 tr->num_segments = 0;
1034 clib_memcpy (tr->localsid.as_u8, ls1->localsid.as_u8,
1035 sizeof (tr->localsid.as_u8));
1036 tr->behavior = ls1->behavior;
1037 if (ip1 == vlib_buffer_get_current (b1))
1039 if (ip1->protocol == IP_PROTOCOL_IPV6_ROUTE
1040 && sr1->type == ROUTING_HEADER_TYPE_SR)
1042 clib_memcpy (tr->sr, sr1->segments, sr1->length * 8);
1044 sr1->length * 8 / sizeof (ip6_address_t);
1045 tr->segments_left = sr1->segments_left;
1049 tr->num_segments = 0xFF;
1052 if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED))
1054 sr_localsid_trace_t *tr =
1055 vlib_add_trace (vm, node, b2, sizeof (*tr));
1056 tr->num_segments = 0;
1057 clib_memcpy (tr->localsid.as_u8, ls2->localsid.as_u8,
1058 sizeof (tr->localsid.as_u8));
1059 tr->behavior = ls2->behavior;
1060 if (ip2 == vlib_buffer_get_current (b2))
1062 if (ip2->protocol == IP_PROTOCOL_IPV6_ROUTE
1063 && sr2->type == ROUTING_HEADER_TYPE_SR)
1065 clib_memcpy (tr->sr, sr2->segments, sr2->length * 8);
1067 sr2->length * 8 / sizeof (ip6_address_t);
1068 tr->segments_left = sr2->segments_left;
1072 tr->num_segments = 0xFF;
1075 if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED))
1077 sr_localsid_trace_t *tr =
1078 vlib_add_trace (vm, node, b3, sizeof (*tr));
1079 tr->num_segments = 0;
1080 clib_memcpy (tr->localsid.as_u8, ls3->localsid.as_u8,
1081 sizeof (tr->localsid.as_u8));
1082 tr->behavior = ls3->behavior;
1083 if (ip3 == vlib_buffer_get_current (b3))
1085 if (ip3->protocol == IP_PROTOCOL_IPV6_ROUTE
1086 && sr3->type == ROUTING_HEADER_TYPE_SR)
1088 clib_memcpy (tr->sr, sr3->segments, sr3->length * 8);
1090 sr3->length * 8 / sizeof (ip6_address_t);
1091 tr->segments_left = sr3->segments_left;
1095 tr->num_segments = 0xFF;
1098 vlib_increment_combined_counter
1100 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1101 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1102 1, vlib_buffer_length_in_chain (vm, b0));
1104 vlib_increment_combined_counter
1106 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1107 &(sm->sr_ls_valid_counters)), thread_index, ls1 - sm->localsids,
1108 1, vlib_buffer_length_in_chain (vm, b1));
1110 vlib_increment_combined_counter
1112 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1113 &(sm->sr_ls_valid_counters)), thread_index, ls2 - sm->localsids,
1114 1, vlib_buffer_length_in_chain (vm, b2));
1116 vlib_increment_combined_counter
1118 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1119 &(sm->sr_ls_valid_counters)), thread_index, ls3 - sm->localsids,
1120 1, vlib_buffer_length_in_chain (vm, b3));
1122 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
1123 n_left_to_next, bi0, bi1, bi2, bi3,
1124 next0, next1, next2, next3);
1127 /* Single loop for potentially the last three packets */
1128 while (n_left_from > 0 && n_left_to_next > 0)
1133 ip6_sr_header_t *sr0;
1134 u32 next0 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1135 ip6_sr_localsid_t *ls0;
1142 n_left_to_next -= 1;
1144 b0 = vlib_get_buffer (vm, bi0);
1145 ip0 = vlib_buffer_get_current (b0);
1147 /* Lookup the SR End behavior based on IP DA (adj) */
1149 pool_elt_at_index (sm->localsids,
1150 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1152 /* Find SRH as well as previous header */
1154 ip6_ext_header_find (vm, b0, ip0, IP_PROTOCOL_IPV6_ROUTE, NULL);
1156 /* SRH processing and End variants */
1157 end_decaps_srh_processing (node, b0, ip0, sr0, ls0, &next0);
1159 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1161 sr_localsid_trace_t *tr =
1162 vlib_add_trace (vm, node, b0, sizeof (*tr));
1163 tr->num_segments = 0;
1164 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1165 sizeof (tr->localsid.as_u8));
1166 tr->behavior = ls0->behavior;
1167 if (ip0 == vlib_buffer_get_current (b0))
1169 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1170 && sr0->type == ROUTING_HEADER_TYPE_SR)
1172 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1174 sr0->length * 8 / sizeof (ip6_address_t);
1175 tr->segments_left = sr0->segments_left;
1179 tr->num_segments = 0xFF;
1182 /* Increase the counters */
1183 vlib_increment_combined_counter
1185 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1186 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1187 1, vlib_buffer_length_in_chain (vm, b0));
1189 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1190 n_left_to_next, bi0, next0);
1192 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1194 return from_frame->n_vectors;
1198 VLIB_REGISTER_NODE (sr_localsid_d_node) = {
1199 .function = sr_localsid_d_fn,
1200 .name = "sr-localsid-d",
1201 .vector_size = sizeof (u32),
1202 .format_trace = format_sr_localsid_trace,
1203 .type = VLIB_NODE_TYPE_INTERNAL,
1204 .n_errors = SR_LOCALSID_N_ERROR,
1205 .error_strings = sr_localsid_error_strings,
1206 .n_next_nodes = SR_LOCALSID_N_NEXT,
1208 #define _(s,n) [SR_LOCALSID_NEXT_##s] = n,
1209 foreach_sr_localsid_next
1216 * @brief SR LocalSID graph node. Supports all default SR Endpoint without decaps
1219 sr_localsid_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1220 vlib_frame_t * from_frame)
1222 u32 n_left_from, next_index, *from, *to_next;
1223 ip6_sr_main_t *sm = &sr_main;
1224 from = vlib_frame_vector_args (from_frame);
1225 n_left_from = from_frame->n_vectors;
1226 next_index = node->cached_next_index;
1227 u32 thread_index = vm->thread_index;
1229 while (n_left_from > 0)
1232 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1235 while (n_left_from >= 8 && n_left_to_next >= 4)
1237 u32 bi0, bi1, bi2, bi3;
1238 vlib_buffer_t *b0, *b1, *b2, *b3;
1239 ip6_header_t *ip0, *ip1, *ip2, *ip3;
1240 ip6_sr_header_t *sr0, *sr1, *sr2, *sr3;
1241 ip6_ext_header_t *prev0, *prev1, *prev2, *prev3;
1242 u32 next0, next1, next2, next3;
1243 next0 = next1 = next2 = next3 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1244 ip6_sr_localsid_t *ls0, *ls1, *ls2, *ls3;
1246 /* Prefetch next iteration. */
1248 vlib_buffer_t *p4, *p5, *p6, *p7;
1250 p4 = vlib_get_buffer (vm, from[4]);
1251 p5 = vlib_get_buffer (vm, from[5]);
1252 p6 = vlib_get_buffer (vm, from[6]);
1253 p7 = vlib_get_buffer (vm, from[7]);
1255 /* Prefetch the buffer header and packet for the N+2 loop iteration */
1256 vlib_prefetch_buffer_header (p4, LOAD);
1257 vlib_prefetch_buffer_header (p5, LOAD);
1258 vlib_prefetch_buffer_header (p6, LOAD);
1259 vlib_prefetch_buffer_header (p7, LOAD);
1261 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
1262 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
1263 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
1264 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
1267 to_next[0] = bi0 = from[0];
1268 to_next[1] = bi1 = from[1];
1269 to_next[2] = bi2 = from[2];
1270 to_next[3] = bi3 = from[3];
1274 n_left_to_next -= 4;
1276 b0 = vlib_get_buffer (vm, bi0);
1277 b1 = vlib_get_buffer (vm, bi1);
1278 b2 = vlib_get_buffer (vm, bi2);
1279 b3 = vlib_get_buffer (vm, bi3);
1281 ip0 = vlib_buffer_get_current (b0);
1282 ip1 = vlib_buffer_get_current (b1);
1283 ip2 = vlib_buffer_get_current (b2);
1284 ip3 = vlib_buffer_get_current (b3);
1287 ip6_ext_header_find (vm, b0, ip0, IP_PROTOCOL_IPV6_ROUTE, &prev0);
1289 ip6_ext_header_find (vm, b1, ip1, IP_PROTOCOL_IPV6_ROUTE, &prev1);
1291 ip6_ext_header_find (vm, b2, ip2, IP_PROTOCOL_IPV6_ROUTE, &prev2);
1293 ip6_ext_header_find (vm, b3, ip3, IP_PROTOCOL_IPV6_ROUTE, &prev3);
1296 pool_elt_at_index (sm->localsids,
1297 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1299 pool_elt_at_index (sm->localsids,
1300 vnet_buffer (b1)->ip.adj_index[VLIB_TX]);
1302 pool_elt_at_index (sm->localsids,
1303 vnet_buffer (b2)->ip.adj_index[VLIB_TX]);
1305 pool_elt_at_index (sm->localsids,
1306 vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
1308 end_srh_processing (node, b0, ip0, sr0, ls0, &next0, ls0->end_psp,
1310 end_srh_processing (node, b1, ip1, sr1, ls1, &next1, ls1->end_psp,
1312 end_srh_processing (node, b2, ip2, sr2, ls2, &next2, ls2->end_psp,
1314 end_srh_processing (node, b3, ip3, sr3, ls3, &next3, ls3->end_psp,
1317 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1319 sr_localsid_trace_t *tr =
1320 vlib_add_trace (vm, node, b0, sizeof (*tr));
1321 tr->num_segments = 0;
1322 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1323 sizeof (tr->localsid.as_u8));
1324 tr->behavior = ls0->behavior;
1325 if (ip0 == vlib_buffer_get_current (b0))
1327 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1328 && sr0->type == ROUTING_HEADER_TYPE_SR)
1330 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1332 sr0->length * 8 / sizeof (ip6_address_t);
1333 tr->segments_left = sr0->segments_left;
1337 tr->num_segments = 0xFF;
1340 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
1342 sr_localsid_trace_t *tr =
1343 vlib_add_trace (vm, node, b1, sizeof (*tr));
1344 tr->num_segments = 0;
1345 clib_memcpy (tr->localsid.as_u8, ls1->localsid.as_u8,
1346 sizeof (tr->localsid.as_u8));
1347 tr->behavior = ls1->behavior;
1348 if (ip1 == vlib_buffer_get_current (b1))
1350 if (ip1->protocol == IP_PROTOCOL_IPV6_ROUTE
1351 && sr1->type == ROUTING_HEADER_TYPE_SR)
1353 clib_memcpy (tr->sr, sr1->segments, sr1->length * 8);
1355 sr1->length * 8 / sizeof (ip6_address_t);
1356 tr->segments_left = sr1->segments_left;
1360 tr->num_segments = 0xFF;
1363 if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED))
1365 sr_localsid_trace_t *tr =
1366 vlib_add_trace (vm, node, b2, sizeof (*tr));
1367 tr->num_segments = 0;
1368 clib_memcpy (tr->localsid.as_u8, ls2->localsid.as_u8,
1369 sizeof (tr->localsid.as_u8));
1370 tr->behavior = ls2->behavior;
1371 if (ip2 == vlib_buffer_get_current (b2))
1373 if (ip2->protocol == IP_PROTOCOL_IPV6_ROUTE
1374 && sr2->type == ROUTING_HEADER_TYPE_SR)
1376 clib_memcpy (tr->sr, sr2->segments, sr2->length * 8);
1378 sr2->length * 8 / sizeof (ip6_address_t);
1379 tr->segments_left = sr2->segments_left;
1383 tr->num_segments = 0xFF;
1386 if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED))
1388 sr_localsid_trace_t *tr =
1389 vlib_add_trace (vm, node, b3, sizeof (*tr));
1390 tr->num_segments = 0;
1391 clib_memcpy (tr->localsid.as_u8, ls3->localsid.as_u8,
1392 sizeof (tr->localsid.as_u8));
1393 tr->behavior = ls3->behavior;
1394 if (ip3 == vlib_buffer_get_current (b3))
1396 if (ip3->protocol == IP_PROTOCOL_IPV6_ROUTE
1397 && sr3->type == ROUTING_HEADER_TYPE_SR)
1399 clib_memcpy (tr->sr, sr3->segments, sr3->length * 8);
1401 sr3->length * 8 / sizeof (ip6_address_t);
1402 tr->segments_left = sr3->segments_left;
1406 tr->num_segments = 0xFF;
1409 vlib_increment_combined_counter
1411 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1412 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1413 1, vlib_buffer_length_in_chain (vm, b0));
1415 vlib_increment_combined_counter
1417 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1418 &(sm->sr_ls_valid_counters)), thread_index, ls1 - sm->localsids,
1419 1, vlib_buffer_length_in_chain (vm, b1));
1421 vlib_increment_combined_counter
1423 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1424 &(sm->sr_ls_valid_counters)), thread_index, ls2 - sm->localsids,
1425 1, vlib_buffer_length_in_chain (vm, b2));
1427 vlib_increment_combined_counter
1429 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1430 &(sm->sr_ls_valid_counters)), thread_index, ls3 - sm->localsids,
1431 1, vlib_buffer_length_in_chain (vm, b3));
1433 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
1434 n_left_to_next, bi0, bi1, bi2, bi3,
1435 next0, next1, next2, next3);
1438 /* Single loop for potentially the last three packets */
1439 while (n_left_from > 0 && n_left_to_next > 0)
1443 ip6_header_t *ip0 = 0;
1444 ip6_ext_header_t *prev0;
1445 ip6_sr_header_t *sr0;
1446 u32 next0 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1447 ip6_sr_localsid_t *ls0;
1454 n_left_to_next -= 1;
1456 b0 = vlib_get_buffer (vm, bi0);
1457 ip0 = vlib_buffer_get_current (b0);
1459 ip6_ext_header_find (vm, b0, ip0, IP_PROTOCOL_IPV6_ROUTE, &prev0);
1461 /* Lookup the SR End behavior based on IP DA (adj) */
1463 pool_elt_at_index (sm->localsids,
1464 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1466 /* SRH processing */
1467 end_srh_processing (node, b0, ip0, sr0, ls0, &next0, ls0->end_psp,
1470 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1472 sr_localsid_trace_t *tr =
1473 vlib_add_trace (vm, node, b0, sizeof (*tr));
1474 tr->num_segments = 0;
1475 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1476 sizeof (tr->localsid.as_u8));
1477 tr->behavior = ls0->behavior;
1478 if (ip0 == vlib_buffer_get_current (b0))
1480 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1481 && sr0->type == ROUTING_HEADER_TYPE_SR)
1483 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1485 sr0->length * 8 / sizeof (ip6_address_t);
1486 tr->segments_left = sr0->segments_left;
1490 tr->num_segments = 0xFF;
1493 vlib_increment_combined_counter
1495 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1496 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1497 1, vlib_buffer_length_in_chain (vm, b0));
1499 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1500 n_left_to_next, bi0, next0);
1502 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1504 return from_frame->n_vectors;
1508 VLIB_REGISTER_NODE (sr_localsid_node) = {
1509 .function = sr_localsid_fn,
1510 .name = "sr-localsid",
1511 .vector_size = sizeof (u32),
1512 .format_trace = format_sr_localsid_trace,
1513 .type = VLIB_NODE_TYPE_INTERNAL,
1514 .n_errors = SR_LOCALSID_N_ERROR,
1515 .error_strings = sr_localsid_error_strings,
1516 .n_next_nodes = SR_LOCALSID_N_NEXT,
1518 #define _(s,n) [SR_LOCALSID_NEXT_##s] = n,
1519 foreach_sr_localsid_next
1526 format_sr_dpo (u8 * s, va_list * args)
1528 index_t index = va_arg (*args, index_t);
1529 CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
1531 return (format (s, "SR: localsid_index:[%d]", index));
1534 const static dpo_vft_t sr_loc_vft = {
1535 .dv_lock = sr_dpo_lock,
1536 .dv_unlock = sr_dpo_unlock,
1537 .dv_format = format_sr_dpo,
1540 const static char *const sr_loc_ip6_nodes[] = {
1545 const static char *const *const sr_loc_nodes[DPO_PROTO_NUM] = {
1546 [DPO_PROTO_IP6] = sr_loc_ip6_nodes,
1549 const static char *const sr_loc_d_ip6_nodes[] = {
1554 const static char *const *const sr_loc_d_nodes[DPO_PROTO_NUM] = {
1555 [DPO_PROTO_IP6] = sr_loc_d_ip6_nodes,
1559 /*************************** SR LocalSID plugins ******************************/
1561 * @brief SR LocalSID plugin registry
1564 sr_localsid_register_function (vlib_main_t * vm, u8 * fn_name,
1565 u8 * keyword_str, u8 * def_str,
1566 u8 * params_str, u8 prefix_length,
1568 format_function_t * ls_format,
1569 unformat_function_t * ls_unformat,
1570 sr_plugin_callback_t * creation_fn,
1571 sr_plugin_callback_t * removal_fn)
1573 ip6_sr_main_t *sm = &sr_main;
1576 sr_localsid_fn_registration_t *plugin;
1578 /* Did this function exist? If so update it */
1579 p = hash_get_mem (sm->plugin_functions_by_key, fn_name);
1582 plugin = pool_elt_at_index (sm->plugin_functions, p[0]);
1584 /* Else create a new one and set hash key */
1587 pool_get (sm->plugin_functions, plugin);
1588 hash_set_mem (sm->plugin_functions_by_key, fn_name,
1589 plugin - sm->plugin_functions);
1592 clib_memset (plugin, 0, sizeof (*plugin));
1594 plugin->sr_localsid_function_number = (plugin - sm->plugin_functions);
1595 plugin->sr_localsid_function_number += SR_BEHAVIOR_LAST;
1596 plugin->prefix_length = prefix_length;
1597 plugin->ls_format = ls_format;
1598 plugin->ls_unformat = ls_unformat;
1599 plugin->creation = creation_fn;
1600 plugin->removal = removal_fn;
1601 clib_memcpy (&plugin->dpo, dpo, sizeof (dpo_type_t));
1602 plugin->function_name = format (0, "%s%c", fn_name, 0);
1603 plugin->keyword_str = format (0, "%s%c", keyword_str, 0);
1604 plugin->def_str = format (0, "%s%c", def_str, 0);
1605 plugin->params_str = format (0, "%s%c", params_str, 0);
1607 return plugin->sr_localsid_function_number;
1611 * @brief CLI function to 'show' all available SR LocalSID behaviors
1613 static clib_error_t *
1614 show_sr_localsid_behaviors_command_fn (vlib_main_t * vm,
1615 unformat_input_t * input,
1616 vlib_cli_command_t * cmd)
1618 ip6_sr_main_t *sm = &sr_main;
1619 sr_localsid_fn_registration_t *plugin;
1620 sr_localsid_fn_registration_t **plugins_vec = 0;
1623 vlib_cli_output (vm,
1624 "SR LocalSIDs behaviors:\n-----------------------\n\n");
1627 pool_foreach (plugin, sm->plugin_functions,
1628 ({ vec_add1 (plugins_vec, plugin); }));
1631 /* Print static behaviors */
1632 vlib_cli_output (vm, "Default behaviors:\n"
1633 "\tEnd\t-> Endpoint.\n"
1634 "\tEnd.X\t-> Endpoint with Layer-3 cross-connect.\n"
1635 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
1636 "\tEnd.T\t-> Endpoint with specific IPv6 table lookup.\n"
1637 "\t\tParameters: '<fib_table>'\n"
1638 "\tEnd.DX2\t-> Endpoint with decapsulation and Layer-2 cross-connect.\n"
1639 "\t\tParameters: '<iface>'\n"
1640 "\tEnd.DX6\t-> Endpoint with decapsulation and IPv6 cross-connect.\n"
1641 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
1642 "\tEnd.DX4\t-> Endpoint with decapsulation and IPv4 cross-connect.\n"
1643 "\t\tParameters: '<iface> <ip4_next_hop>'\n"
1644 "\tEnd.DT6\t-> Endpoint with decapsulation and specific IPv6 table lookup.\n"
1645 "\t\tParameters: '<ip6_fib_table>'\n"
1646 "\tEnd.DT4\t-> Endpoint with decapsulation and specific IPv4 table lookup.\n"
1647 "\t\tParameters: '<ip4_fib_table>'\n");
1648 vlib_cli_output (vm, "Plugin behaviors:\n");
1649 for (i = 0; i < vec_len (plugins_vec); i++)
1651 plugin = plugins_vec[i];
1652 vlib_cli_output (vm, "\t%s\t-> %s.\n", plugin->keyword_str,
1654 vlib_cli_output (vm, "\t\tParameters: '%s'\n", plugin->params_str);
1660 VLIB_CLI_COMMAND (show_sr_localsid_behaviors_command, static) = {
1661 .path = "show sr localsids behaviors",
1662 .short_help = "show sr localsids behaviors",
1663 .function = show_sr_localsid_behaviors_command_fn,
1668 * @brief SR LocalSID initialization
1671 sr_localsids_init (vlib_main_t * vm)
1673 /* Init memory for function keys */
1674 ip6_sr_main_t *sm = &sr_main;
1675 mhash_init (&sm->sr_localsids_index_hash, sizeof (uword),
1676 sizeof (ip6_address_t));
1677 /* Init SR behaviors DPO type */
1678 sr_localsid_dpo_type = dpo_register_new_type (&sr_loc_vft, sr_loc_nodes);
1679 /* Init SR behaviors DPO type */
1680 sr_localsid_d_dpo_type =
1681 dpo_register_new_type (&sr_loc_vft, sr_loc_d_nodes);
1682 /* Init memory for localsid plugins */
1683 sm->plugin_functions_by_key = hash_create_string (0, sizeof (uword));
1687 VLIB_INIT_FUNCTION (sr_localsids_init);
1689 * fd.io coding-style-patch-verification: ON
1692 * eval: (c-set-style "gnu")