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,
508 fib_table_get_table_id (ls->vrf_index,
511 case SR_BEHAVIOR_DX4:
513 "\tAddress: \t%U\n\tBehavior: \tDX4 (Endpoint with decapsulation and IPv4 cross-connect)"
514 "\n\tIface: \t%U\n\tNext hop: \t%U",
515 format_ip6_address, &ls->localsid,
516 format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
517 format_ip4_address, &ls->next_hop.ip4);
519 case SR_BEHAVIOR_DX6:
521 "\tAddress: \t%U\n\tBehavior: \tDX6 (Endpoint with decapsulation and IPv6 cross-connect)"
522 "\n\tIface: \t%U\n\tNext hop: \t%U",
523 format_ip6_address, &ls->localsid,
524 format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
525 format_ip6_address, &ls->next_hop.ip6);
527 case SR_BEHAVIOR_DX2:
528 if (ls->vlan_index == (u32) ~ 0)
530 "\tAddress: \t%U\n\tBehavior: \tDX2 (Endpoint with decapulation and Layer-2 cross-connect)"
531 "\n\tIface: \t%U", format_ip6_address,
532 &ls->localsid, format_vnet_sw_if_index_name, vnm,
536 "Unsupported yet. (DX2 with egress VLAN rewrite)");
538 case SR_BEHAVIOR_DT6:
540 "\tAddress: \t%U\n\tBehavior: \tDT6 (Endpoint with decapsulation and specific IPv6 table lookup)"
541 "\n\tTable: %u", format_ip6_address, &ls->localsid,
542 fib_table_get_table_id (ls->vrf_index,
545 case SR_BEHAVIOR_DT4:
547 "\tAddress: \t%U\n\tBehavior: \tDT4 (Endpoint with decapsulation and specific IPv4 table lookup)"
548 "\n\tTable: \t%u", format_ip6_address,
550 fib_table_get_table_id (ls->vrf_index,
554 if (ls->behavior >= SR_BEHAVIOR_LAST)
556 sr_localsid_fn_registration_t *plugin =
557 pool_elt_at_index (sm->plugin_functions,
558 ls->behavior - SR_BEHAVIOR_LAST);
560 vlib_cli_output (vm, "\tAddress: \t%U\n"
561 "\tBehavior: \t%s (%s)\n\t%U",
562 format_ip6_address, &ls->localsid,
563 plugin->keyword_str, plugin->def_str,
564 plugin->ls_format, ls->plugin_mem);
567 //Should never get here...
568 vlib_cli_output (vm, "Internal error");
572 vlib_cli_output (vm, "\tPSP: \tTrue\n");
575 vlib_counter_t valid, invalid;
576 vlib_get_combined_counter (&(sm->sr_ls_valid_counters), i, &valid);
577 vlib_get_combined_counter (&(sm->sr_ls_invalid_counters), i, &invalid);
578 vlib_cli_output (vm, "\tGood traffic: \t[%Ld packets : %Ld bytes]\n",
579 valid.packets, valid.bytes);
580 vlib_cli_output (vm, "\tBad traffic: \t[%Ld packets : %Ld bytes]\n",
581 invalid.packets, invalid.bytes);
582 vlib_cli_output (vm, "--------------------");
588 VLIB_CLI_COMMAND (show_sr_localsid_command, static) = {
589 .path = "show sr localsids",
590 .short_help = "show sr localsids",
591 .function = show_sr_localsid_command_fn,
596 * @brief Function to 'clear' ALL SR localsid counters
598 static clib_error_t *
599 clear_sr_localsid_counters_command_fn (vlib_main_t * vm,
600 unformat_input_t * input,
601 vlib_cli_command_t * cmd)
603 ip6_sr_main_t *sm = &sr_main;
605 vlib_clear_combined_counters (&(sm->sr_ls_valid_counters));
606 vlib_clear_combined_counters (&(sm->sr_ls_invalid_counters));
612 VLIB_CLI_COMMAND (clear_sr_localsid_counters_command, static) = {
613 .path = "clear sr localsid-counters",
614 .short_help = "clear sr localsid-counters",
615 .function = clear_sr_localsid_counters_command_fn,
619 /************************ SR LocalSID graphs node ****************************/
621 * @brief SR localsid node trace
625 ip6_address_t localsid;
630 } sr_localsid_trace_t;
632 #define foreach_sr_localsid_error \
633 _(NO_INNER_HEADER, "(SR-Error) No inner IP header") \
634 _(NO_MORE_SEGMENTS, "(SR-Error) No more segments") \
635 _(NO_SRH, "(SR-Error) No SR header") \
636 _(NO_PSP, "(SR-Error) PSP Not available (segments left > 0)") \
637 _(NOT_LS, "(SR-Error) Decaps not available (segments left > 0)") \
638 _(L2, "(SR-Error) SRv6 decapsulated a L2 frame without dest")
642 #define _(sym,str) SR_LOCALSID_ERROR_##sym,
643 foreach_sr_localsid_error
646 } sr_localsid_error_t;
648 static char *sr_localsid_error_strings[] = {
649 #define _(sym,string) string,
650 foreach_sr_localsid_error
654 #define foreach_sr_localsid_next \
655 _(ERROR, "error-drop") \
656 _(IP6_LOOKUP, "ip6-lookup") \
657 _(IP4_LOOKUP, "ip4-lookup") \
658 _(IP6_REWRITE, "ip6-rewrite") \
659 _(IP4_REWRITE, "ip4-rewrite") \
660 _(INTERFACE_OUTPUT, "interface-output")
664 #define _(s,n) SR_LOCALSID_NEXT_##s,
665 foreach_sr_localsid_next
668 } sr_localsid_next_t;
671 * @brief SR LocalSID graph node trace function
676 format_sr_localsid_trace (u8 * s, va_list * args)
678 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
679 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
680 sr_localsid_trace_t *t = va_arg (*args, sr_localsid_trace_t *);
683 format (s, "SR-LOCALSID:\n\tLocalsid: %U\n", format_ip6_address,
687 case SR_BEHAVIOR_END:
688 s = format (s, "\tBehavior: End\n");
690 case SR_BEHAVIOR_DX6:
691 s = format (s, "\tBehavior: Decapsulation with IPv6 L3 xconnect\n");
693 case SR_BEHAVIOR_DX4:
694 s = format (s, "\tBehavior: Decapsulation with IPv4 L3 xconnect\n");
697 s = format (s, "\tBehavior: IPv6 L3 xconnect\n");
700 s = format (s, "\tBehavior: IPv6 specific table lookup\n");
702 case SR_BEHAVIOR_DT6:
703 s = format (s, "\tBehavior: Decapsulation with IPv6 Table lookup\n");
705 case SR_BEHAVIOR_DT4:
706 s = format (s, "\tBehavior: Decapsulation with IPv4 Table lookup\n");
708 case SR_BEHAVIOR_DX2:
709 s = format (s, "\tBehavior: Decapsulation with L2 xconnect\n");
712 s = format (s, "\tBehavior: defined in plugin\n"); //TODO
715 if (t->num_segments != 0xFF)
717 if (t->num_segments > 0)
719 s = format (s, "\tSegments left: %d\n", t->segments_left);
720 s = format (s, "\tSID list: [in ietf order]");
722 for (i = 0; i < t->num_segments; i++)
724 s = format (s, "\n\t-> %U", format_ip6_address,
725 (ip6_address_t *) & t->sr[i *
726 sizeof (ip6_address_t)]);
734 * @brief Function doing End processing.
736 static_always_inline void
737 end_srh_processing (vlib_node_runtime_t * node,
740 ip6_sr_header_t * sr0,
741 ip6_sr_localsid_t * ls0,
742 u32 * next0, u8 psp, ip6_ext_header_t * prev0)
744 ip6_address_t *new_dst0;
746 if (PREDICT_TRUE (sr0 && sr0->type == ROUTING_HEADER_TYPE_SR))
748 if (sr0->segments_left == 1 && psp)
751 u64 *copy_dst0, *copy_src0;
752 u32 copy_len_u64s0 = 0;
754 ip0->dst_address.as_u64[0] = sr0->segments->as_u64[0];
755 ip0->dst_address.as_u64[1] = sr0->segments->as_u64[1];
757 /* Remove the SRH taking care of the rest of IPv6 ext header */
759 prev0->next_hdr = sr0->protocol;
761 ip0->protocol = sr0->protocol;
763 sr_len = ip6_ext_header_len (sr0);
764 vlib_buffer_advance (b0, sr_len);
765 new_l0 = clib_net_to_host_u16 (ip0->payload_length) - sr_len;
766 ip0->payload_length = clib_host_to_net_u16 (new_l0);
767 copy_src0 = (u64 *) ip0;
768 copy_dst0 = copy_src0 + (sr0->length + 1);
769 /* number of 8 octet units to copy
770 * By default in absence of extension headers it is equal to length of ip6 header
771 * With extension headers it number of 8 octet units of ext headers preceding
775 (((u8 *) sr0 - (u8 *) ip0) - sizeof (ip6_header_t)) >> 3;
776 copy_dst0[4 + copy_len_u64s0] = copy_src0[4 + copy_len_u64s0];
777 copy_dst0[3 + copy_len_u64s0] = copy_src0[3 + copy_len_u64s0];
778 copy_dst0[2 + copy_len_u64s0] = copy_src0[2 + copy_len_u64s0];
779 copy_dst0[1 + copy_len_u64s0] = copy_src0[1 + copy_len_u64s0];
780 copy_dst0[0 + copy_len_u64s0] = copy_src0[0 + copy_len_u64s0];
783 for (i = copy_len_u64s0 - 1; i >= 0; i--)
785 copy_dst0[i] = copy_src0[i];
788 if (ls0->behavior == SR_BEHAVIOR_X)
790 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
791 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
793 else if (ls0->behavior == SR_BEHAVIOR_T)
795 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
798 else if (PREDICT_TRUE (sr0->segments_left > 0))
800 sr0->segments_left -= 1;
801 new_dst0 = (ip6_address_t *) (sr0->segments);
802 new_dst0 += sr0->segments_left;
803 ip0->dst_address.as_u64[0] = new_dst0->as_u64[0];
804 ip0->dst_address.as_u64[1] = new_dst0->as_u64[1];
806 if (ls0->behavior == SR_BEHAVIOR_X)
808 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
809 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
811 else if (ls0->behavior == SR_BEHAVIOR_T)
813 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
818 *next0 = SR_LOCALSID_NEXT_ERROR;
819 b0->error = node->errors[SR_LOCALSID_ERROR_NO_MORE_SEGMENTS];
824 /* Error. Routing header of type != SR */
825 *next0 = SR_LOCALSID_NEXT_ERROR;
826 b0->error = node->errors[SR_LOCALSID_ERROR_NO_SRH];
831 * @brief Function doing SRH processing for D* variants
833 static_always_inline void
834 end_decaps_srh_processing (vlib_node_runtime_t * node,
837 ip6_sr_header_t * sr0,
838 ip6_sr_localsid_t * ls0, u32 * next0)
840 /* Compute the size of the IPv6 header with all Ext. headers */
842 ip6_ext_header_t *next_ext_header;
845 next_proto = ip0->protocol;
846 next_ext_header = (void *) (ip0 + 1);
847 total_size = sizeof (ip6_header_t);
848 while (ip6_ext_hdr (next_proto))
850 total_size += ip6_ext_header_len (next_ext_header);
851 next_proto = next_ext_header->next_hdr;
852 next_ext_header = ip6_ext_next_header (next_ext_header);
855 /* Ensure this is the last segment. Otherwise drop. */
856 if (sr0 && sr0->segments_left != 0)
858 *next0 = SR_LOCALSID_NEXT_ERROR;
859 b0->error = node->errors[SR_LOCALSID_ERROR_NOT_LS];
865 case IP_PROTOCOL_IPV6:
866 /* Encap-End IPv6. Pop outer IPv6 header. */
867 if (ls0->behavior == SR_BEHAVIOR_DX6)
869 vlib_buffer_advance (b0, total_size);
870 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
871 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
874 else if (ls0->behavior == SR_BEHAVIOR_DT6)
876 vlib_buffer_advance (b0, total_size);
877 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
881 case IP_PROTOCOL_IP_IN_IP:
882 /* Encap-End IPv4. Pop outer IPv6 header */
883 if (ls0->behavior == SR_BEHAVIOR_DX4)
885 vlib_buffer_advance (b0, total_size);
886 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
887 *next0 = SR_LOCALSID_NEXT_IP4_REWRITE;
890 else if (ls0->behavior == SR_BEHAVIOR_DT4)
892 vlib_buffer_advance (b0, total_size);
893 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
894 *next0 = SR_LOCALSID_NEXT_IP4_LOOKUP;
898 case IP_PROTOCOL_IP6_ETHERNET:
900 if (ls0->behavior == SR_BEHAVIOR_DX2)
902 vlib_buffer_advance (b0, total_size);
903 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->sw_if_index;
904 *next0 = SR_LOCALSID_NEXT_INTERFACE_OUTPUT;
909 *next0 = SR_LOCALSID_NEXT_ERROR;
910 b0->error = node->errors[SR_LOCALSID_ERROR_NO_INNER_HEADER];
915 * @brief SR LocalSID graph node. Supports all default SR Endpoint variants with decaps
918 sr_localsid_d_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
919 vlib_frame_t * from_frame)
921 u32 n_left_from, next_index, *from, *to_next;
922 ip6_sr_main_t *sm = &sr_main;
923 from = vlib_frame_vector_args (from_frame);
924 n_left_from = from_frame->n_vectors;
925 next_index = node->cached_next_index;
926 u32 thread_index = vm->thread_index;
928 while (n_left_from > 0)
931 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
934 while (n_left_from >= 8 && n_left_to_next >= 4)
936 u32 bi0, bi1, bi2, bi3;
937 vlib_buffer_t *b0, *b1, *b2, *b3;
938 ip6_header_t *ip0, *ip1, *ip2, *ip3;
939 ip6_sr_header_t *sr0, *sr1, *sr2, *sr3;
940 u32 next0, next1, next2, next3;
941 next0 = next1 = next2 = next3 = SR_LOCALSID_NEXT_IP6_LOOKUP;
942 ip6_sr_localsid_t *ls0, *ls1, *ls2, *ls3;
944 /* Prefetch next iteration. */
946 vlib_buffer_t *p4, *p5, *p6, *p7;
948 p4 = vlib_get_buffer (vm, from[4]);
949 p5 = vlib_get_buffer (vm, from[5]);
950 p6 = vlib_get_buffer (vm, from[6]);
951 p7 = vlib_get_buffer (vm, from[7]);
953 /* Prefetch the buffer header and packet for the N+4 loop iteration */
954 vlib_prefetch_buffer_header (p4, LOAD);
955 vlib_prefetch_buffer_header (p5, LOAD);
956 vlib_prefetch_buffer_header (p6, LOAD);
957 vlib_prefetch_buffer_header (p7, LOAD);
959 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
960 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
961 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
962 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
965 to_next[0] = bi0 = from[0];
966 to_next[1] = bi1 = from[1];
967 to_next[2] = bi2 = from[2];
968 to_next[3] = bi3 = from[3];
974 b0 = vlib_get_buffer (vm, bi0);
975 b1 = vlib_get_buffer (vm, bi1);
976 b2 = vlib_get_buffer (vm, bi2);
977 b3 = vlib_get_buffer (vm, bi3);
980 pool_elt_at_index (sm->localsids,
981 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
983 pool_elt_at_index (sm->localsids,
984 vnet_buffer (b1)->ip.adj_index[VLIB_TX]);
986 pool_elt_at_index (sm->localsids,
987 vnet_buffer (b2)->ip.adj_index[VLIB_TX]);
989 pool_elt_at_index (sm->localsids,
990 vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
992 ip0 = vlib_buffer_get_current (b0);
993 ip1 = vlib_buffer_get_current (b1);
994 ip2 = vlib_buffer_get_current (b2);
995 ip3 = vlib_buffer_get_current (b3);
998 ip6_ext_header_find (vm, b0, ip0, IP_PROTOCOL_IPV6_ROUTE, NULL);
1000 ip6_ext_header_find (vm, b1, ip1, IP_PROTOCOL_IPV6_ROUTE, NULL);
1002 ip6_ext_header_find (vm, b2, ip2, IP_PROTOCOL_IPV6_ROUTE, NULL);
1004 ip6_ext_header_find (vm, b3, ip3, IP_PROTOCOL_IPV6_ROUTE, NULL);
1006 end_decaps_srh_processing (node, b0, ip0, sr0, ls0, &next0);
1007 end_decaps_srh_processing (node, b1, ip1, sr1, ls1, &next1);
1008 end_decaps_srh_processing (node, b2, ip2, sr2, ls2, &next2);
1009 end_decaps_srh_processing (node, b3, ip3, sr3, ls3, &next3);
1011 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1013 sr_localsid_trace_t *tr =
1014 vlib_add_trace (vm, node, b0, sizeof (*tr));
1015 tr->num_segments = 0;
1016 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1017 sizeof (tr->localsid.as_u8));
1018 tr->behavior = ls0->behavior;
1019 if (ip0 == vlib_buffer_get_current (b0))
1021 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1022 && sr0->type == ROUTING_HEADER_TYPE_SR)
1024 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1026 sr0->length * 8 / sizeof (ip6_address_t);
1027 tr->segments_left = sr0->segments_left;
1031 tr->num_segments = 0xFF;
1034 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
1036 sr_localsid_trace_t *tr =
1037 vlib_add_trace (vm, node, b1, sizeof (*tr));
1038 tr->num_segments = 0;
1039 clib_memcpy (tr->localsid.as_u8, ls1->localsid.as_u8,
1040 sizeof (tr->localsid.as_u8));
1041 tr->behavior = ls1->behavior;
1042 if (ip1 == vlib_buffer_get_current (b1))
1044 if (ip1->protocol == IP_PROTOCOL_IPV6_ROUTE
1045 && sr1->type == ROUTING_HEADER_TYPE_SR)
1047 clib_memcpy (tr->sr, sr1->segments, sr1->length * 8);
1049 sr1->length * 8 / sizeof (ip6_address_t);
1050 tr->segments_left = sr1->segments_left;
1054 tr->num_segments = 0xFF;
1057 if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED))
1059 sr_localsid_trace_t *tr =
1060 vlib_add_trace (vm, node, b2, sizeof (*tr));
1061 tr->num_segments = 0;
1062 clib_memcpy (tr->localsid.as_u8, ls2->localsid.as_u8,
1063 sizeof (tr->localsid.as_u8));
1064 tr->behavior = ls2->behavior;
1065 if (ip2 == vlib_buffer_get_current (b2))
1067 if (ip2->protocol == IP_PROTOCOL_IPV6_ROUTE
1068 && sr2->type == ROUTING_HEADER_TYPE_SR)
1070 clib_memcpy (tr->sr, sr2->segments, sr2->length * 8);
1072 sr2->length * 8 / sizeof (ip6_address_t);
1073 tr->segments_left = sr2->segments_left;
1077 tr->num_segments = 0xFF;
1080 if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED))
1082 sr_localsid_trace_t *tr =
1083 vlib_add_trace (vm, node, b3, sizeof (*tr));
1084 tr->num_segments = 0;
1085 clib_memcpy (tr->localsid.as_u8, ls3->localsid.as_u8,
1086 sizeof (tr->localsid.as_u8));
1087 tr->behavior = ls3->behavior;
1088 if (ip3 == vlib_buffer_get_current (b3))
1090 if (ip3->protocol == IP_PROTOCOL_IPV6_ROUTE
1091 && sr3->type == ROUTING_HEADER_TYPE_SR)
1093 clib_memcpy (tr->sr, sr3->segments, sr3->length * 8);
1095 sr3->length * 8 / sizeof (ip6_address_t);
1096 tr->segments_left = sr3->segments_left;
1100 tr->num_segments = 0xFF;
1103 vlib_increment_combined_counter
1105 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1106 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1107 1, vlib_buffer_length_in_chain (vm, b0));
1109 vlib_increment_combined_counter
1111 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1112 &(sm->sr_ls_valid_counters)), thread_index, ls1 - sm->localsids,
1113 1, vlib_buffer_length_in_chain (vm, b1));
1115 vlib_increment_combined_counter
1117 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1118 &(sm->sr_ls_valid_counters)), thread_index, ls2 - sm->localsids,
1119 1, vlib_buffer_length_in_chain (vm, b2));
1121 vlib_increment_combined_counter
1123 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1124 &(sm->sr_ls_valid_counters)), thread_index, ls3 - sm->localsids,
1125 1, vlib_buffer_length_in_chain (vm, b3));
1127 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
1128 n_left_to_next, bi0, bi1, bi2, bi3,
1129 next0, next1, next2, next3);
1132 /* Single loop for potentially the last three packets */
1133 while (n_left_from > 0 && n_left_to_next > 0)
1138 ip6_sr_header_t *sr0;
1139 u32 next0 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1140 ip6_sr_localsid_t *ls0;
1147 n_left_to_next -= 1;
1149 b0 = vlib_get_buffer (vm, bi0);
1150 ip0 = vlib_buffer_get_current (b0);
1152 /* Lookup the SR End behavior based on IP DA (adj) */
1154 pool_elt_at_index (sm->localsids,
1155 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1157 /* Find SRH as well as previous header */
1159 ip6_ext_header_find (vm, b0, ip0, IP_PROTOCOL_IPV6_ROUTE, NULL);
1161 /* SRH processing and End variants */
1162 end_decaps_srh_processing (node, b0, ip0, sr0, ls0, &next0);
1164 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1166 sr_localsid_trace_t *tr =
1167 vlib_add_trace (vm, node, b0, sizeof (*tr));
1168 tr->num_segments = 0;
1169 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1170 sizeof (tr->localsid.as_u8));
1171 tr->behavior = ls0->behavior;
1172 if (ip0 == vlib_buffer_get_current (b0))
1174 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1175 && sr0->type == ROUTING_HEADER_TYPE_SR)
1177 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1179 sr0->length * 8 / sizeof (ip6_address_t);
1180 tr->segments_left = sr0->segments_left;
1184 tr->num_segments = 0xFF;
1187 /* Increase the counters */
1188 vlib_increment_combined_counter
1190 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1191 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1192 1, vlib_buffer_length_in_chain (vm, b0));
1194 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1195 n_left_to_next, bi0, next0);
1197 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1199 return from_frame->n_vectors;
1203 VLIB_REGISTER_NODE (sr_localsid_d_node) = {
1204 .function = sr_localsid_d_fn,
1205 .name = "sr-localsid-d",
1206 .vector_size = sizeof (u32),
1207 .format_trace = format_sr_localsid_trace,
1208 .type = VLIB_NODE_TYPE_INTERNAL,
1209 .n_errors = SR_LOCALSID_N_ERROR,
1210 .error_strings = sr_localsid_error_strings,
1211 .n_next_nodes = SR_LOCALSID_N_NEXT,
1213 #define _(s,n) [SR_LOCALSID_NEXT_##s] = n,
1214 foreach_sr_localsid_next
1221 * @brief SR LocalSID graph node. Supports all default SR Endpoint without decaps
1224 sr_localsid_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1225 vlib_frame_t * from_frame)
1227 u32 n_left_from, next_index, *from, *to_next;
1228 ip6_sr_main_t *sm = &sr_main;
1229 from = vlib_frame_vector_args (from_frame);
1230 n_left_from = from_frame->n_vectors;
1231 next_index = node->cached_next_index;
1232 u32 thread_index = vm->thread_index;
1234 while (n_left_from > 0)
1237 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1240 while (n_left_from >= 8 && n_left_to_next >= 4)
1242 u32 bi0, bi1, bi2, bi3;
1243 vlib_buffer_t *b0, *b1, *b2, *b3;
1244 ip6_header_t *ip0, *ip1, *ip2, *ip3;
1245 ip6_sr_header_t *sr0, *sr1, *sr2, *sr3;
1246 ip6_ext_header_t *prev0, *prev1, *prev2, *prev3;
1247 u32 next0, next1, next2, next3;
1248 next0 = next1 = next2 = next3 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1249 ip6_sr_localsid_t *ls0, *ls1, *ls2, *ls3;
1251 /* Prefetch next iteration. */
1253 vlib_buffer_t *p4, *p5, *p6, *p7;
1255 p4 = vlib_get_buffer (vm, from[4]);
1256 p5 = vlib_get_buffer (vm, from[5]);
1257 p6 = vlib_get_buffer (vm, from[6]);
1258 p7 = vlib_get_buffer (vm, from[7]);
1260 /* Prefetch the buffer header and packet for the N+2 loop iteration */
1261 vlib_prefetch_buffer_header (p4, LOAD);
1262 vlib_prefetch_buffer_header (p5, LOAD);
1263 vlib_prefetch_buffer_header (p6, LOAD);
1264 vlib_prefetch_buffer_header (p7, LOAD);
1266 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
1267 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
1268 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
1269 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
1272 to_next[0] = bi0 = from[0];
1273 to_next[1] = bi1 = from[1];
1274 to_next[2] = bi2 = from[2];
1275 to_next[3] = bi3 = from[3];
1279 n_left_to_next -= 4;
1281 b0 = vlib_get_buffer (vm, bi0);
1282 b1 = vlib_get_buffer (vm, bi1);
1283 b2 = vlib_get_buffer (vm, bi2);
1284 b3 = vlib_get_buffer (vm, bi3);
1286 ip0 = vlib_buffer_get_current (b0);
1287 ip1 = vlib_buffer_get_current (b1);
1288 ip2 = vlib_buffer_get_current (b2);
1289 ip3 = vlib_buffer_get_current (b3);
1292 ip6_ext_header_find (vm, b0, ip0, IP_PROTOCOL_IPV6_ROUTE, &prev0);
1294 ip6_ext_header_find (vm, b1, ip1, IP_PROTOCOL_IPV6_ROUTE, &prev1);
1296 ip6_ext_header_find (vm, b2, ip2, IP_PROTOCOL_IPV6_ROUTE, &prev2);
1298 ip6_ext_header_find (vm, b3, ip3, IP_PROTOCOL_IPV6_ROUTE, &prev3);
1301 pool_elt_at_index (sm->localsids,
1302 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1304 pool_elt_at_index (sm->localsids,
1305 vnet_buffer (b1)->ip.adj_index[VLIB_TX]);
1307 pool_elt_at_index (sm->localsids,
1308 vnet_buffer (b2)->ip.adj_index[VLIB_TX]);
1310 pool_elt_at_index (sm->localsids,
1311 vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
1313 end_srh_processing (node, b0, ip0, sr0, ls0, &next0, ls0->end_psp,
1315 end_srh_processing (node, b1, ip1, sr1, ls1, &next1, ls1->end_psp,
1317 end_srh_processing (node, b2, ip2, sr2, ls2, &next2, ls2->end_psp,
1319 end_srh_processing (node, b3, ip3, sr3, ls3, &next3, ls3->end_psp,
1322 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1324 sr_localsid_trace_t *tr =
1325 vlib_add_trace (vm, node, b0, sizeof (*tr));
1326 tr->num_segments = 0;
1327 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1328 sizeof (tr->localsid.as_u8));
1329 tr->behavior = ls0->behavior;
1330 if (ip0 == vlib_buffer_get_current (b0))
1332 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1333 && sr0->type == ROUTING_HEADER_TYPE_SR)
1335 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1337 sr0->length * 8 / sizeof (ip6_address_t);
1338 tr->segments_left = sr0->segments_left;
1342 tr->num_segments = 0xFF;
1345 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
1347 sr_localsid_trace_t *tr =
1348 vlib_add_trace (vm, node, b1, sizeof (*tr));
1349 tr->num_segments = 0;
1350 clib_memcpy (tr->localsid.as_u8, ls1->localsid.as_u8,
1351 sizeof (tr->localsid.as_u8));
1352 tr->behavior = ls1->behavior;
1353 if (ip1 == vlib_buffer_get_current (b1))
1355 if (ip1->protocol == IP_PROTOCOL_IPV6_ROUTE
1356 && sr1->type == ROUTING_HEADER_TYPE_SR)
1358 clib_memcpy (tr->sr, sr1->segments, sr1->length * 8);
1360 sr1->length * 8 / sizeof (ip6_address_t);
1361 tr->segments_left = sr1->segments_left;
1365 tr->num_segments = 0xFF;
1368 if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED))
1370 sr_localsid_trace_t *tr =
1371 vlib_add_trace (vm, node, b2, sizeof (*tr));
1372 tr->num_segments = 0;
1373 clib_memcpy (tr->localsid.as_u8, ls2->localsid.as_u8,
1374 sizeof (tr->localsid.as_u8));
1375 tr->behavior = ls2->behavior;
1376 if (ip2 == vlib_buffer_get_current (b2))
1378 if (ip2->protocol == IP_PROTOCOL_IPV6_ROUTE
1379 && sr2->type == ROUTING_HEADER_TYPE_SR)
1381 clib_memcpy (tr->sr, sr2->segments, sr2->length * 8);
1383 sr2->length * 8 / sizeof (ip6_address_t);
1384 tr->segments_left = sr2->segments_left;
1388 tr->num_segments = 0xFF;
1391 if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED))
1393 sr_localsid_trace_t *tr =
1394 vlib_add_trace (vm, node, b3, sizeof (*tr));
1395 tr->num_segments = 0;
1396 clib_memcpy (tr->localsid.as_u8, ls3->localsid.as_u8,
1397 sizeof (tr->localsid.as_u8));
1398 tr->behavior = ls3->behavior;
1399 if (ip3 == vlib_buffer_get_current (b3))
1401 if (ip3->protocol == IP_PROTOCOL_IPV6_ROUTE
1402 && sr3->type == ROUTING_HEADER_TYPE_SR)
1404 clib_memcpy (tr->sr, sr3->segments, sr3->length * 8);
1406 sr3->length * 8 / sizeof (ip6_address_t);
1407 tr->segments_left = sr3->segments_left;
1411 tr->num_segments = 0xFF;
1414 vlib_increment_combined_counter
1416 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1417 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1418 1, vlib_buffer_length_in_chain (vm, b0));
1420 vlib_increment_combined_counter
1422 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1423 &(sm->sr_ls_valid_counters)), thread_index, ls1 - sm->localsids,
1424 1, vlib_buffer_length_in_chain (vm, b1));
1426 vlib_increment_combined_counter
1428 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1429 &(sm->sr_ls_valid_counters)), thread_index, ls2 - sm->localsids,
1430 1, vlib_buffer_length_in_chain (vm, b2));
1432 vlib_increment_combined_counter
1434 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1435 &(sm->sr_ls_valid_counters)), thread_index, ls3 - sm->localsids,
1436 1, vlib_buffer_length_in_chain (vm, b3));
1438 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
1439 n_left_to_next, bi0, bi1, bi2, bi3,
1440 next0, next1, next2, next3);
1443 /* Single loop for potentially the last three packets */
1444 while (n_left_from > 0 && n_left_to_next > 0)
1448 ip6_header_t *ip0 = 0;
1449 ip6_ext_header_t *prev0;
1450 ip6_sr_header_t *sr0;
1451 u32 next0 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1452 ip6_sr_localsid_t *ls0;
1459 n_left_to_next -= 1;
1461 b0 = vlib_get_buffer (vm, bi0);
1462 ip0 = vlib_buffer_get_current (b0);
1464 ip6_ext_header_find (vm, b0, ip0, IP_PROTOCOL_IPV6_ROUTE, &prev0);
1466 /* Lookup the SR End behavior based on IP DA (adj) */
1468 pool_elt_at_index (sm->localsids,
1469 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1471 /* SRH processing */
1472 end_srh_processing (node, b0, ip0, sr0, ls0, &next0, ls0->end_psp,
1475 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1477 sr_localsid_trace_t *tr =
1478 vlib_add_trace (vm, node, b0, sizeof (*tr));
1479 tr->num_segments = 0;
1480 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1481 sizeof (tr->localsid.as_u8));
1482 tr->behavior = ls0->behavior;
1483 if (ip0 == vlib_buffer_get_current (b0))
1485 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1486 && sr0->type == ROUTING_HEADER_TYPE_SR)
1488 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1490 sr0->length * 8 / sizeof (ip6_address_t);
1491 tr->segments_left = sr0->segments_left;
1495 tr->num_segments = 0xFF;
1498 vlib_increment_combined_counter
1500 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1501 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1502 1, vlib_buffer_length_in_chain (vm, b0));
1504 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1505 n_left_to_next, bi0, next0);
1507 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1509 return from_frame->n_vectors;
1513 VLIB_REGISTER_NODE (sr_localsid_node) = {
1514 .function = sr_localsid_fn,
1515 .name = "sr-localsid",
1516 .vector_size = sizeof (u32),
1517 .format_trace = format_sr_localsid_trace,
1518 .type = VLIB_NODE_TYPE_INTERNAL,
1519 .n_errors = SR_LOCALSID_N_ERROR,
1520 .error_strings = sr_localsid_error_strings,
1521 .n_next_nodes = SR_LOCALSID_N_NEXT,
1523 #define _(s,n) [SR_LOCALSID_NEXT_##s] = n,
1524 foreach_sr_localsid_next
1531 format_sr_dpo (u8 * s, va_list * args)
1533 index_t index = va_arg (*args, index_t);
1534 CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
1536 return (format (s, "SR: localsid_index:[%d]", index));
1539 const static dpo_vft_t sr_loc_vft = {
1540 .dv_lock = sr_dpo_lock,
1541 .dv_unlock = sr_dpo_unlock,
1542 .dv_format = format_sr_dpo,
1545 const static char *const sr_loc_ip6_nodes[] = {
1550 const static char *const *const sr_loc_nodes[DPO_PROTO_NUM] = {
1551 [DPO_PROTO_IP6] = sr_loc_ip6_nodes,
1554 const static char *const sr_loc_d_ip6_nodes[] = {
1559 const static char *const *const sr_loc_d_nodes[DPO_PROTO_NUM] = {
1560 [DPO_PROTO_IP6] = sr_loc_d_ip6_nodes,
1564 /*************************** SR LocalSID plugins ******************************/
1566 * @brief SR LocalSID plugin registry
1569 sr_localsid_register_function (vlib_main_t * vm, u8 * fn_name,
1570 u8 * keyword_str, u8 * def_str,
1571 u8 * params_str, u8 prefix_length,
1573 format_function_t * ls_format,
1574 unformat_function_t * ls_unformat,
1575 sr_plugin_callback_t * creation_fn,
1576 sr_plugin_callback_t * removal_fn)
1578 ip6_sr_main_t *sm = &sr_main;
1581 sr_localsid_fn_registration_t *plugin;
1583 /* Did this function exist? If so update it */
1584 p = hash_get_mem (sm->plugin_functions_by_key, fn_name);
1587 plugin = pool_elt_at_index (sm->plugin_functions, p[0]);
1589 /* Else create a new one and set hash key */
1592 pool_get (sm->plugin_functions, plugin);
1593 hash_set_mem (sm->plugin_functions_by_key, fn_name,
1594 plugin - sm->plugin_functions);
1597 clib_memset (plugin, 0, sizeof (*plugin));
1599 plugin->sr_localsid_function_number = (plugin - sm->plugin_functions);
1600 plugin->sr_localsid_function_number += SR_BEHAVIOR_LAST;
1601 plugin->prefix_length = prefix_length;
1602 plugin->ls_format = ls_format;
1603 plugin->ls_unformat = ls_unformat;
1604 plugin->creation = creation_fn;
1605 plugin->removal = removal_fn;
1606 clib_memcpy (&plugin->dpo, dpo, sizeof (dpo_type_t));
1607 plugin->function_name = format (0, "%s%c", fn_name, 0);
1608 plugin->keyword_str = format (0, "%s%c", keyword_str, 0);
1609 plugin->def_str = format (0, "%s%c", def_str, 0);
1610 plugin->params_str = format (0, "%s%c", params_str, 0);
1612 return plugin->sr_localsid_function_number;
1616 * @brief CLI function to 'show' all available SR LocalSID behaviors
1618 static clib_error_t *
1619 show_sr_localsid_behaviors_command_fn (vlib_main_t * vm,
1620 unformat_input_t * input,
1621 vlib_cli_command_t * cmd)
1623 ip6_sr_main_t *sm = &sr_main;
1624 sr_localsid_fn_registration_t *plugin;
1625 sr_localsid_fn_registration_t **plugins_vec = 0;
1628 vlib_cli_output (vm,
1629 "SR LocalSIDs behaviors:\n-----------------------\n\n");
1632 pool_foreach (plugin, sm->plugin_functions,
1633 ({ vec_add1 (plugins_vec, plugin); }));
1636 /* Print static behaviors */
1637 vlib_cli_output (vm, "Default behaviors:\n"
1638 "\tEnd\t-> Endpoint.\n"
1639 "\tEnd.X\t-> Endpoint with Layer-3 cross-connect.\n"
1640 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
1641 "\tEnd.T\t-> Endpoint with specific IPv6 table lookup.\n"
1642 "\t\tParameters: '<fib_table>'\n"
1643 "\tEnd.DX2\t-> Endpoint with decapsulation and Layer-2 cross-connect.\n"
1644 "\t\tParameters: '<iface>'\n"
1645 "\tEnd.DX6\t-> Endpoint with decapsulation and IPv6 cross-connect.\n"
1646 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
1647 "\tEnd.DX4\t-> Endpoint with decapsulation and IPv4 cross-connect.\n"
1648 "\t\tParameters: '<iface> <ip4_next_hop>'\n"
1649 "\tEnd.DT6\t-> Endpoint with decapsulation and specific IPv6 table lookup.\n"
1650 "\t\tParameters: '<ip6_fib_table>'\n"
1651 "\tEnd.DT4\t-> Endpoint with decapsulation and specific IPv4 table lookup.\n"
1652 "\t\tParameters: '<ip4_fib_table>'\n");
1653 vlib_cli_output (vm, "Plugin behaviors:\n");
1654 for (i = 0; i < vec_len (plugins_vec); i++)
1656 plugin = plugins_vec[i];
1657 vlib_cli_output (vm, "\t%s\t-> %s.\n", plugin->keyword_str,
1659 vlib_cli_output (vm, "\t\tParameters: '%s'\n", plugin->params_str);
1665 VLIB_CLI_COMMAND (show_sr_localsid_behaviors_command, static) = {
1666 .path = "show sr localsids behaviors",
1667 .short_help = "show sr localsids behaviors",
1668 .function = show_sr_localsid_behaviors_command_fn,
1673 * @brief SR LocalSID initialization
1676 sr_localsids_init (vlib_main_t * vm)
1678 /* Init memory for function keys */
1679 ip6_sr_main_t *sm = &sr_main;
1680 mhash_init (&sm->sr_localsids_index_hash, sizeof (uword),
1681 sizeof (ip6_address_t));
1682 /* Init SR behaviors DPO type */
1683 sr_localsid_dpo_type = dpo_register_new_type (&sr_loc_vft, sr_loc_nodes);
1684 /* Init SR behaviors DPO type */
1685 sr_localsid_d_dpo_type =
1686 dpo_register_new_type (&sr_loc_vft, sr_loc_d_nodes);
1687 /* Init memory for localsid plugins */
1688 sm->plugin_functions_by_key = hash_create_string (0, sizeof (uword));
1692 VLIB_INIT_FUNCTION (sr_localsids_init);
1694 * fd.io coding-style-patch-verification: ON
1697 * eval: (c-set-style "gnu")