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,
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 ip6_sr_localsid_t *ls = 0;
76 dpo_id_t dpo = DPO_INVALID;
78 /* Search for the item */
79 p = mhash_get (&sm->sr_localsids_index_hash, localsid_addr);
85 /* Retrieve localsid */
86 ls = pool_elt_at_index (sm->localsids, p[0]);
87 /* Delete FIB entry */
89 .fp_proto = FIB_PROTOCOL_IP6,
92 .ip6 = *localsid_addr,
96 fib_table_entry_delete (fib_table_find (FIB_PROTOCOL_IP6,
100 /* In case it is a Xconnect iface remove the (OIF, NHOP) adj */
101 if (ls->behavior == SR_BEHAVIOR_X || ls->behavior == SR_BEHAVIOR_DX6
102 || ls->behavior == SR_BEHAVIOR_DX4)
103 adj_unlock (ls->nh_adj);
105 if (ls->behavior >= SR_BEHAVIOR_LAST)
107 sr_localsid_fn_registration_t *plugin = 0;
108 plugin = pool_elt_at_index (sm->plugin_functions,
109 ls->behavior - SR_BEHAVIOR_LAST);
111 /* Callback plugin removal function */
112 rv = plugin->removal (ls);
115 /* Delete localsid registry */
116 pool_put (sm->localsids, ls);
117 mhash_unset (&sm->sr_localsids_index_hash, localsid_addr, NULL);
120 else /* create with function already existing; complain */
124 /* delete; localsid does not exist; complain */
128 /* Check whether there exists a FIB entry with such address */
130 .fp_proto = FIB_PROTOCOL_IP6,
134 pfx.fp_addr.as_u64[0] = localsid_addr->as_u64[0];
135 pfx.fp_addr.as_u64[1] = localsid_addr->as_u64[1];
137 /* Lookup the FIB index associated to the table id provided */
138 u32 fib_index = fib_table_find (FIB_PROTOCOL_IP6, fib_table);
142 /* Lookup the localsid in such FIB table */
143 fib_node_index_t fei = fib_table_lookup_exact_match (fib_index, &pfx);
144 if (FIB_NODE_INDEX_INVALID != fei)
145 return -4; //There is an entry for such address (the localsid addr)
147 /* Create a new localsid registry */
148 pool_get (sm->localsids, ls);
149 clib_memset (ls, 0, sizeof (*ls));
151 clib_memcpy (&ls->localsid, localsid_addr, sizeof (ip6_address_t));
152 ls->end_psp = end_psp;
153 ls->behavior = behavior;
154 ls->nh_adj = (u32) ~ 0;
155 ls->fib_table = fib_table;
158 case SR_BEHAVIOR_END:
161 ls->sw_if_index = sw_if_index;
162 clib_memcpy (&ls->next_hop.ip6, &nh_addr->ip6, sizeof (ip6_address_t));
165 ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP6, sw_if_index);
167 case SR_BEHAVIOR_DX4:
168 ls->sw_if_index = sw_if_index;
169 clib_memcpy (&ls->next_hop.ip4, &nh_addr->ip4, sizeof (ip4_address_t));
171 case SR_BEHAVIOR_DX6:
172 ls->sw_if_index = sw_if_index;
173 clib_memcpy (&ls->next_hop.ip6, &nh_addr->ip6, sizeof (ip6_address_t));
175 case SR_BEHAVIOR_DT6:
176 ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP6, sw_if_index);
178 case SR_BEHAVIOR_DT4:
179 ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP4, sw_if_index);
181 case SR_BEHAVIOR_DX2:
182 ls->sw_if_index = sw_if_index;
183 ls->vlan_index = vlan_index;
187 /* Figure out the adjacency magic for Xconnect variants */
188 if (ls->behavior == SR_BEHAVIOR_X || ls->behavior == SR_BEHAVIOR_DX4
189 || ls->behavior == SR_BEHAVIOR_DX6)
191 adj_index_t nh_adj_index = ADJ_INDEX_INVALID;
193 /* Retrieve the adjacency corresponding to the (OIF, next_hop) */
194 if (ls->behavior == SR_BEHAVIOR_DX6 || ls->behavior == SR_BEHAVIOR_X)
195 nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6,
196 nh_addr, sw_if_index);
198 else if (ls->behavior == SR_BEHAVIOR_DX4)
199 nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, VNET_LINK_IP4,
200 nh_addr, sw_if_index);
202 /* Check for ADJ creation error. If so panic */
203 if (nh_adj_index == ADJ_INDEX_INVALID)
205 pool_put (sm->localsids, ls);
209 ls->nh_adj = nh_adj_index;
213 if (ls->behavior == SR_BEHAVIOR_END || ls->behavior == SR_BEHAVIOR_X)
214 dpo_set (&dpo, sr_localsid_dpo_type, DPO_PROTO_IP6, ls - sm->localsids);
215 else if (ls->behavior > SR_BEHAVIOR_D_FIRST
216 && ls->behavior < SR_BEHAVIOR_LAST)
217 dpo_set (&dpo, sr_localsid_d_dpo_type, DPO_PROTO_IP6, ls - sm->localsids);
218 else if (ls->behavior >= SR_BEHAVIOR_LAST)
220 sr_localsid_fn_registration_t *plugin = 0;
221 plugin = pool_elt_at_index (sm->plugin_functions,
222 ls->behavior - SR_BEHAVIOR_LAST);
223 /* Copy the unformat memory result */
224 ls->plugin_mem = ls_plugin_mem;
225 /* Callback plugin creation function */
226 rv = plugin->creation (ls);
229 pool_put (sm->localsids, ls);
232 dpo_set (&dpo, plugin->dpo, DPO_PROTO_IP6, ls - sm->localsids);
235 /* Set hash key for searching localsid by address */
236 mhash_set (&sm->sr_localsids_index_hash, localsid_addr, ls - sm->localsids,
239 fib_table_entry_special_dpo_add (fib_index, &pfx, FIB_SOURCE_SR,
240 FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
243 /* Set counter to zero */
244 vlib_validate_combined_counter (&(sm->sr_ls_valid_counters),
246 vlib_validate_combined_counter (&(sm->sr_ls_invalid_counters),
249 vlib_zero_combined_counter (&(sm->sr_ls_valid_counters),
251 vlib_zero_combined_counter (&(sm->sr_ls_invalid_counters),
258 * @brief SR LocalSID CLI function.
260 * @see sr_cli_localsid
262 static clib_error_t *
263 sr_cli_localsid_command_fn (vlib_main_t * vm, unformat_input_t * input,
264 vlib_cli_command_t * cmd)
266 vnet_main_t *vnm = vnet_get_main ();
267 ip6_sr_main_t *sm = &sr_main;
268 u32 sw_if_index = (u32) ~ 0, vlan_index = (u32) ~ 0, fib_index = 0;
271 ip6_address_t resulting_address;
272 ip46_address_t next_hop;
273 char address_set = 0;
275 void *ls_plugin_mem = 0;
279 clib_memset (&resulting_address, 0, sizeof (ip6_address_t));
280 ip46_address_reset (&next_hop);
282 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
284 if (unformat (input, "del"))
286 else if (!address_set
287 && unformat (input, "address %U", unformat_ip6_address,
290 else if (!address_set
291 && unformat (input, "addr %U", unformat_ip6_address,
294 else if (unformat (input, "fib-table %u", &fib_index));
295 else if (vlan_index == (u32) ~ 0
296 && unformat (input, "vlan %u", &vlan_index));
297 else if (!behavior && unformat (input, "behavior"))
299 if (unformat (input, "end.x %U %U",
300 unformat_vnet_sw_interface, vnm, &sw_if_index,
301 unformat_ip6_address, &next_hop.ip6))
302 behavior = SR_BEHAVIOR_X;
303 else if (unformat (input, "end.t %u", &sw_if_index))
304 behavior = SR_BEHAVIOR_T;
305 else if (unformat (input, "end.dx6 %U %U",
306 unformat_vnet_sw_interface, vnm, &sw_if_index,
307 unformat_ip6_address, &next_hop.ip6))
308 behavior = SR_BEHAVIOR_DX6;
309 else if (unformat (input, "end.dx4 %U %U",
310 unformat_vnet_sw_interface, vnm, &sw_if_index,
311 unformat_ip4_address, &next_hop.ip4))
312 behavior = SR_BEHAVIOR_DX4;
313 else if (unformat (input, "end.dx2 %U",
314 unformat_vnet_sw_interface, vnm, &sw_if_index))
315 behavior = SR_BEHAVIOR_DX2;
316 else if (unformat (input, "end.dt6 %u", &sw_if_index))
317 behavior = SR_BEHAVIOR_DT6;
318 else if (unformat (input, "end.dt4 %u", &sw_if_index))
319 behavior = SR_BEHAVIOR_DT4;
322 /* Loop over all the plugin behavior format functions */
323 sr_localsid_fn_registration_t *plugin = 0, **vec_plugins = 0;
324 sr_localsid_fn_registration_t **plugin_it = 0;
326 /* Create a vector out of the plugin pool as recommended */
328 pool_foreach (plugin, sm->plugin_functions,
330 vec_add1 (vec_plugins, plugin);
334 vec_foreach (plugin_it, vec_plugins)
337 (input, "%U", (*plugin_it)->ls_unformat, &ls_plugin_mem))
339 behavior = (*plugin_it)->sr_localsid_function_number;
347 if (unformat (input, "end"))
348 behavior = SR_BEHAVIOR_END;
353 else if (!end_psp && unformat (input, "psp"))
359 if (!behavior && end_psp)
360 behavior = SR_BEHAVIOR_END;
363 return clib_error_return (0,
364 "Error: SRv6 LocalSID address is mandatory.");
365 if (!is_del && !behavior)
366 return clib_error_return (0,
367 "Error: SRv6 LocalSID behavior is mandatory.");
368 if (vlan_index != (u32) ~ 0)
369 return clib_error_return (0,
370 "Error: SRv6 End.DX2 with rewrite VLAN tag not supported by now.");
371 if (end_psp && !(behavior == SR_BEHAVIOR_END || behavior == SR_BEHAVIOR_X))
372 return clib_error_return (0,
373 "Error: SRv6 PSP only compatible with End and End.X");
375 rv = sr_cli_localsid (is_del, &resulting_address, end_psp, behavior,
376 sw_if_index, vlan_index, fib_index, &next_hop,
386 return clib_error_return (0,
387 "Identical localsid already exists. Requested localsid not created.");
389 return clib_error_return (0,
390 "The requested localsid could not be deleted. SR localsid not found");
392 return clib_error_return (0, "FIB table %u does not exist", fib_index);
394 return clib_error_return (0, "There is already one FIB entry for the"
395 "requested localsid non segment routing related");
397 return clib_error_return (0,
398 "Could not create ARP/ND entry for such next_hop. Internal error.");
400 return clib_error_return (0,
401 "Error on the plugin based localsid creation.");
403 return clib_error_return (0, "BUG: sr localsid returns %d", rv);
409 VLIB_CLI_COMMAND (sr_localsid_command, static) = {
410 .path = "sr localsid",
411 .short_help = "sr localsid (del) address XX:XX::YY:YY"
412 "(fib-table 8) behavior STRING",
414 "Create SR LocalSID and binds it to a particular behavior\n"
416 "\tlocalSID IPv6_addr(128b) LocalSID IPv6 address\n"
417 "\t(fib-table X) Optional. VRF where to install SRv6 localsid\n"
418 "\tbehavior STRING Specifies the behavior\n"
420 "\tEnd\t-> Endpoint.\n"
421 "\tEnd.X\t-> Endpoint with decapsulation and Layer-3 cross-connect.\n"
422 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
423 "\tEnd.DX2\t-> Endpoint with decapsulation and Layer-2 cross-connect.\n"
424 "\t\tParameters: '<iface>'\n"
425 "\tEnd.DX6\t-> Endpoint with decapsulation and IPv6 cross-connect.\n"
426 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
427 "\tEnd.DX4\t-> Endpoint with decapsulation and IPv4 cross-connect.\n"
428 "\t\tParameters: '<iface> <ip4_next_hop>'\n"
429 "\tEnd.DT6\t-> Endpoint with decapsulation and specific IPv6 table lookup.\n"
430 "\t\tParameters: '<ip6_fib_table>'\n"
431 "\tEnd.DT4\t-> Endpoint with decapsulation and specific IPv4 table lookup.\n"
432 "\t\tParameters: '<ip4_fib_table>'\n",
433 .function = sr_cli_localsid_command_fn,
438 * @brief CLI function to 'show' all SR LocalSIDs on console.
440 static clib_error_t *
441 show_sr_localsid_command_fn (vlib_main_t * vm, unformat_input_t * input,
442 vlib_cli_command_t * cmd)
444 vnet_main_t *vnm = vnet_get_main ();
445 ip6_sr_main_t *sm = &sr_main;
446 ip6_sr_localsid_t **localsid_list = 0;
447 ip6_sr_localsid_t *ls;
450 vlib_cli_output (vm, "SRv6 - My LocalSID Table:");
451 vlib_cli_output (vm, "=========================");
453 pool_foreach (ls, sm->localsids, ({ vec_add1 (localsid_list, ls); }));
455 for (i = 0; i < vec_len (localsid_list); i++)
457 ls = localsid_list[i];
458 switch (ls->behavior)
460 case SR_BEHAVIOR_END:
461 vlib_cli_output (vm, "\tAddress: \t%U\n\tBehavior: \tEnd",
462 format_ip6_address, &ls->localsid);
466 "\tAddress: \t%U\n\tBehavior: \tX (Endpoint with Layer-3 cross-connect)"
467 "\n\tIface: \t%U\n\tNext hop: \t%U",
468 format_ip6_address, &ls->localsid,
469 format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
470 format_ip6_address, &ls->next_hop.ip6);
474 "\tAddress: \t%U\n\tBehavior: \tT (Endpoint with specific IPv6 table lookup)"
476 format_ip6_address, &ls->localsid, ls->vrf_index);
478 case SR_BEHAVIOR_DX4:
480 "\tAddress: \t%U\n\tBehavior: \tDX4 (Endpoint with decapsulation and IPv4 cross-connect)"
481 "\n\tIface: \t%U\n\tNext hop: \t%U",
482 format_ip6_address, &ls->localsid,
483 format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
484 format_ip4_address, &ls->next_hop.ip4);
486 case SR_BEHAVIOR_DX6:
488 "\tAddress: \t%U\n\tBehavior: \tDX6 (Endpoint with decapsulation and IPv6 cross-connect)"
489 "\n\tIface: \t%U\n\tNext hop: \t%U",
490 format_ip6_address, &ls->localsid,
491 format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
492 format_ip6_address, &ls->next_hop.ip6);
494 case SR_BEHAVIOR_DX2:
495 if (ls->vlan_index == (u32) ~ 0)
497 "\tAddress: \t%U\n\tBehavior: \tDX2 (Endpoint with decapulation and Layer-2 cross-connect)"
498 "\n\tIface: \t%U", format_ip6_address,
499 &ls->localsid, format_vnet_sw_if_index_name, vnm,
503 "Unsupported yet. (DX2 with egress VLAN rewrite)");
505 case SR_BEHAVIOR_DT6:
507 "\tAddress: \t%U\n\tBehavior: \tDT6 (Endpoint with decapsulation and specific IPv6 table lookup)"
508 "\n\tTable: %u", format_ip6_address, &ls->localsid,
511 case SR_BEHAVIOR_DT4:
513 "\tAddress: \t%U\n\tBehavior: \tDT4 (Endpoint with decapsulation and specific IPv4 table lookup)"
514 "\n\tTable: \t%u", format_ip6_address,
515 &ls->localsid, ls->vrf_index);
518 if (ls->behavior >= SR_BEHAVIOR_LAST)
520 sr_localsid_fn_registration_t *plugin =
521 pool_elt_at_index (sm->plugin_functions,
522 ls->behavior - SR_BEHAVIOR_LAST);
524 vlib_cli_output (vm, "\tAddress: \t%U\n"
525 "\tBehavior: \t%s (%s)\n\t%U",
526 format_ip6_address, &ls->localsid,
527 plugin->keyword_str, plugin->def_str,
528 plugin->ls_format, ls->plugin_mem);
531 //Should never get here...
532 vlib_cli_output (vm, "Internal error");
536 vlib_cli_output (vm, "\tPSP: \tTrue\n");
539 vlib_counter_t valid, invalid;
540 vlib_get_combined_counter (&(sm->sr_ls_valid_counters), i, &valid);
541 vlib_get_combined_counter (&(sm->sr_ls_invalid_counters), i, &invalid);
542 vlib_cli_output (vm, "\tGood traffic: \t[%Ld packets : %Ld bytes]\n",
543 valid.packets, valid.bytes);
544 vlib_cli_output (vm, "\tBad traffic: \t[%Ld packets : %Ld bytes]\n",
545 invalid.packets, invalid.bytes);
546 vlib_cli_output (vm, "--------------------");
552 VLIB_CLI_COMMAND (show_sr_localsid_command, static) = {
553 .path = "show sr localsids",
554 .short_help = "show sr localsids",
555 .function = show_sr_localsid_command_fn,
560 * @brief Function to 'clear' ALL SR localsid counters
562 static clib_error_t *
563 clear_sr_localsid_counters_command_fn (vlib_main_t * vm,
564 unformat_input_t * input,
565 vlib_cli_command_t * cmd)
567 ip6_sr_main_t *sm = &sr_main;
569 vlib_clear_combined_counters (&(sm->sr_ls_valid_counters));
570 vlib_clear_combined_counters (&(sm->sr_ls_invalid_counters));
576 VLIB_CLI_COMMAND (clear_sr_localsid_counters_command, static) = {
577 .path = "clear sr localsid-counters",
578 .short_help = "clear sr localsid-counters",
579 .function = clear_sr_localsid_counters_command_fn,
583 /************************ SR LocalSID graphs node ****************************/
585 * @brief SR localsid node trace
589 ip6_address_t localsid;
594 } sr_localsid_trace_t;
596 #define foreach_sr_localsid_error \
597 _(NO_INNER_HEADER, "(SR-Error) No inner IP header") \
598 _(NO_MORE_SEGMENTS, "(SR-Error) No more segments") \
599 _(NO_SRH, "(SR-Error) No SR header") \
600 _(NO_PSP, "(SR-Error) PSP Not available (segments left > 0)") \
601 _(NOT_LS, "(SR-Error) Decaps not available (segments left > 0)") \
602 _(L2, "(SR-Error) SRv6 decapsulated a L2 frame without dest")
606 #define _(sym,str) SR_LOCALSID_ERROR_##sym,
607 foreach_sr_localsid_error
610 } sr_localsid_error_t;
612 static char *sr_localsid_error_strings[] = {
613 #define _(sym,string) string,
614 foreach_sr_localsid_error
618 #define foreach_sr_localsid_next \
619 _(ERROR, "error-drop") \
620 _(IP6_LOOKUP, "ip6-lookup") \
621 _(IP4_LOOKUP, "ip4-lookup") \
622 _(IP6_REWRITE, "ip6-rewrite") \
623 _(IP4_REWRITE, "ip4-rewrite") \
624 _(INTERFACE_OUTPUT, "interface-output")
628 #define _(s,n) SR_LOCALSID_NEXT_##s,
629 foreach_sr_localsid_next
632 } sr_localsid_next_t;
635 * @brief SR LocalSID graph node trace function
640 format_sr_localsid_trace (u8 * s, va_list * args)
642 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
643 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
644 sr_localsid_trace_t *t = va_arg (*args, sr_localsid_trace_t *);
647 format (s, "SR-LOCALSID:\n\tLocalsid: %U\n", format_ip6_address,
651 case SR_BEHAVIOR_END:
652 s = format (s, "\tBehavior: End\n");
654 case SR_BEHAVIOR_DX6:
655 s = format (s, "\tBehavior: Decapsulation with IPv6 L3 xconnect\n");
657 case SR_BEHAVIOR_DX4:
658 s = format (s, "\tBehavior: Decapsulation with IPv4 L3 xconnect\n");
661 s = format (s, "\tBehavior: IPv6 L3 xconnect\n");
664 s = format (s, "\tBehavior: IPv6 specific table lookup\n");
666 case SR_BEHAVIOR_DT6:
667 s = format (s, "\tBehavior: Decapsulation with IPv6 Table lookup\n");
669 case SR_BEHAVIOR_DT4:
670 s = format (s, "\tBehavior: Decapsulation with IPv4 Table lookup\n");
672 case SR_BEHAVIOR_DX2:
673 s = format (s, "\tBehavior: Decapsulation with L2 xconnect\n");
676 s = format (s, "\tBehavior: defined in plugin\n"); //TODO
679 if (t->num_segments != 0xFF)
681 if (t->num_segments > 0)
683 s = format (s, "\tSegments left: %d\n", t->segments_left);
684 s = format (s, "\tSID list: [in ietf order]");
686 for (i = 0; i < t->num_segments; i++)
688 s = format (s, "\n\t-> %U", format_ip6_address,
689 (ip6_address_t *) & t->sr[i *
690 sizeof (ip6_address_t)]);
698 * @brief Function doing End processing.
700 static_always_inline void
701 end_srh_processing (vlib_node_runtime_t * node,
704 ip6_sr_header_t * sr0,
705 ip6_sr_localsid_t * ls0,
706 u32 * next0, u8 psp, ip6_ext_header_t * prev0)
708 ip6_address_t *new_dst0;
710 if (PREDICT_TRUE (sr0->type == ROUTING_HEADER_TYPE_SR))
712 if (sr0->segments_left == 1 && psp)
715 u64 *copy_dst0, *copy_src0;
716 u32 copy_len_u64s0 = 0;
718 ip0->dst_address.as_u64[0] = sr0->segments->as_u64[0];
719 ip0->dst_address.as_u64[1] = sr0->segments->as_u64[1];
721 /* Remove the SRH taking care of the rest of IPv6 ext header */
723 prev0->next_hdr = sr0->protocol;
725 ip0->protocol = sr0->protocol;
727 sr_len = ip6_ext_header_len (sr0);
728 vlib_buffer_advance (b0, sr_len);
729 new_l0 = clib_net_to_host_u16 (ip0->payload_length) - sr_len;
730 ip0->payload_length = clib_host_to_net_u16 (new_l0);
731 copy_src0 = (u64 *) ip0;
732 copy_dst0 = copy_src0 + (sr0->length + 1);
733 /* number of 8 octet units to copy
734 * By default in absence of extension headers it is equal to length of ip6 header
735 * With extension headers it number of 8 octet units of ext headers preceding
739 (((u8 *) sr0 - (u8 *) ip0) - sizeof (ip6_header_t)) >> 3;
740 copy_dst0[4 + copy_len_u64s0] = copy_src0[4 + copy_len_u64s0];
741 copy_dst0[3 + copy_len_u64s0] = copy_src0[3 + copy_len_u64s0];
742 copy_dst0[2 + copy_len_u64s0] = copy_src0[2 + copy_len_u64s0];
743 copy_dst0[1 + copy_len_u64s0] = copy_src0[1 + copy_len_u64s0];
744 copy_dst0[0 + copy_len_u64s0] = copy_src0[0 + copy_len_u64s0];
747 for (i = copy_len_u64s0 - 1; i >= 0; i--)
749 copy_dst0[i] = copy_src0[i];
752 if (ls0->behavior == SR_BEHAVIOR_X)
754 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
755 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
757 else if (ls0->behavior == SR_BEHAVIOR_T)
759 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
762 else if (PREDICT_TRUE (sr0->segments_left > 0))
764 sr0->segments_left -= 1;
765 new_dst0 = (ip6_address_t *) (sr0->segments);
766 new_dst0 += sr0->segments_left;
767 ip0->dst_address.as_u64[0] = new_dst0->as_u64[0];
768 ip0->dst_address.as_u64[1] = new_dst0->as_u64[1];
770 if (ls0->behavior == SR_BEHAVIOR_X)
772 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
773 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
775 else if (ls0->behavior == SR_BEHAVIOR_T)
777 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
782 *next0 = SR_LOCALSID_NEXT_ERROR;
783 b0->error = node->errors[SR_LOCALSID_ERROR_NO_MORE_SEGMENTS];
788 /* Error. Routing header of type != SR */
789 *next0 = SR_LOCALSID_NEXT_ERROR;
790 b0->error = node->errors[SR_LOCALSID_ERROR_NO_SRH];
795 * @brief Function doing SRH processing for D* variants
797 static_always_inline void
798 end_decaps_srh_processing (vlib_node_runtime_t * node,
801 ip6_sr_header_t * sr0,
802 ip6_sr_localsid_t * ls0, u32 * next0)
804 /* Compute the size of the IPv6 header with all Ext. headers */
806 ip6_ext_header_t *next_ext_header;
809 next_proto = ip0->protocol;
810 next_ext_header = (void *) (ip0 + 1);
811 total_size = sizeof (ip6_header_t);
812 while (ip6_ext_hdr (next_proto))
814 total_size += ip6_ext_header_len (next_ext_header);
815 next_proto = next_ext_header->next_hdr;
816 next_ext_header = ip6_ext_next_header (next_ext_header);
819 /* Ensure this is the last segment. Otherwise drop. */
820 if (sr0 && sr0->segments_left != 0)
822 *next0 = SR_LOCALSID_NEXT_ERROR;
823 b0->error = node->errors[SR_LOCALSID_ERROR_NOT_LS];
829 case IP_PROTOCOL_IPV6:
830 /* Encap-End IPv6. Pop outer IPv6 header. */
831 if (ls0->behavior == SR_BEHAVIOR_DX6)
833 vlib_buffer_advance (b0, total_size);
834 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
835 *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
838 else if (ls0->behavior == SR_BEHAVIOR_DT6)
840 vlib_buffer_advance (b0, total_size);
841 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
845 case IP_PROTOCOL_IP_IN_IP:
846 /* Encap-End IPv4. Pop outer IPv6 header */
847 if (ls0->behavior == SR_BEHAVIOR_DX4)
849 vlib_buffer_advance (b0, total_size);
850 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
851 *next0 = SR_LOCALSID_NEXT_IP4_REWRITE;
854 else if (ls0->behavior == SR_BEHAVIOR_DT4)
856 vlib_buffer_advance (b0, total_size);
857 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
858 *next0 = SR_LOCALSID_NEXT_IP4_LOOKUP;
862 case IP_PROTOCOL_IP6_NONXT:
864 if (ls0->behavior == SR_BEHAVIOR_DX2)
866 vlib_buffer_advance (b0, total_size);
867 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->sw_if_index;
868 *next0 = SR_LOCALSID_NEXT_INTERFACE_OUTPUT;
873 *next0 = SR_LOCALSID_NEXT_ERROR;
874 b0->error = node->errors[SR_LOCALSID_ERROR_NO_INNER_HEADER];
879 * @brief SR LocalSID graph node. Supports all default SR Endpoint variants with decaps
882 sr_localsid_d_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
883 vlib_frame_t * from_frame)
885 u32 n_left_from, next_index, *from, *to_next;
886 ip6_sr_main_t *sm = &sr_main;
887 from = vlib_frame_vector_args (from_frame);
888 n_left_from = from_frame->n_vectors;
889 next_index = node->cached_next_index;
890 u32 thread_index = vm->thread_index;
892 while (n_left_from > 0)
895 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
898 while (n_left_from >= 8 && n_left_to_next >= 4)
900 u32 bi0, bi1, bi2, bi3;
901 vlib_buffer_t *b0, *b1, *b2, *b3;
902 ip6_header_t *ip0, *ip1, *ip2, *ip3;
903 ip6_ext_header_t *prev0, *prev1, *prev2, *prev3;
904 ip6_sr_header_t *sr0, *sr1, *sr2, *sr3;
905 u32 next0, next1, next2, next3;
906 next0 = next1 = next2 = next3 = SR_LOCALSID_NEXT_IP6_LOOKUP;
907 ip6_sr_localsid_t *ls0, *ls1, *ls2, *ls3;
909 /* Prefetch next iteration. */
911 vlib_buffer_t *p4, *p5, *p6, *p7;
913 p4 = vlib_get_buffer (vm, from[4]);
914 p5 = vlib_get_buffer (vm, from[5]);
915 p6 = vlib_get_buffer (vm, from[6]);
916 p7 = vlib_get_buffer (vm, from[7]);
918 /* Prefetch the buffer header and packet for the N+4 loop iteration */
919 vlib_prefetch_buffer_header (p4, LOAD);
920 vlib_prefetch_buffer_header (p5, LOAD);
921 vlib_prefetch_buffer_header (p6, LOAD);
922 vlib_prefetch_buffer_header (p7, LOAD);
924 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
925 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
926 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
927 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
930 to_next[0] = bi0 = from[0];
931 to_next[1] = bi1 = from[1];
932 to_next[2] = bi2 = from[2];
933 to_next[3] = bi3 = from[3];
939 b0 = vlib_get_buffer (vm, bi0);
940 b1 = vlib_get_buffer (vm, bi1);
941 b2 = vlib_get_buffer (vm, bi2);
942 b3 = vlib_get_buffer (vm, bi3);
945 pool_elt_at_index (sm->localsids,
946 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
948 pool_elt_at_index (sm->localsids,
949 vnet_buffer (b1)->ip.adj_index[VLIB_TX]);
951 pool_elt_at_index (sm->localsids,
952 vnet_buffer (b2)->ip.adj_index[VLIB_TX]);
954 pool_elt_at_index (sm->localsids,
955 vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
957 ip0 = vlib_buffer_get_current (b0);
958 ip1 = vlib_buffer_get_current (b1);
959 ip2 = vlib_buffer_get_current (b2);
960 ip3 = vlib_buffer_get_current (b3);
962 ip6_ext_header_find_t (ip0, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE);
963 ip6_ext_header_find_t (ip1, prev1, sr1, IP_PROTOCOL_IPV6_ROUTE);
964 ip6_ext_header_find_t (ip2, prev2, sr2, IP_PROTOCOL_IPV6_ROUTE);
965 ip6_ext_header_find_t (ip3, prev3, sr3, IP_PROTOCOL_IPV6_ROUTE);
967 end_decaps_srh_processing (node, b0, ip0, sr0, ls0, &next0);
968 end_decaps_srh_processing (node, b1, ip1, sr1, ls1, &next1);
969 end_decaps_srh_processing (node, b2, ip2, sr2, ls2, &next2);
970 end_decaps_srh_processing (node, b3, ip3, sr3, ls3, &next3);
972 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
974 sr_localsid_trace_t *tr =
975 vlib_add_trace (vm, node, b0, sizeof (*tr));
976 tr->num_segments = 0;
977 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
978 sizeof (tr->localsid.as_u8));
979 tr->behavior = ls0->behavior;
980 if (ip0 == vlib_buffer_get_current (b0))
982 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
983 && sr0->type == ROUTING_HEADER_TYPE_SR)
985 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
987 sr0->length * 8 / sizeof (ip6_address_t);
988 tr->segments_left = sr0->segments_left;
992 tr->num_segments = 0xFF;
995 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
997 sr_localsid_trace_t *tr =
998 vlib_add_trace (vm, node, b1, sizeof (*tr));
999 tr->num_segments = 0;
1000 clib_memcpy (tr->localsid.as_u8, ls1->localsid.as_u8,
1001 sizeof (tr->localsid.as_u8));
1002 tr->behavior = ls1->behavior;
1003 if (ip1 == vlib_buffer_get_current (b1))
1005 if (ip1->protocol == IP_PROTOCOL_IPV6_ROUTE
1006 && sr1->type == ROUTING_HEADER_TYPE_SR)
1008 clib_memcpy (tr->sr, sr1->segments, sr1->length * 8);
1010 sr1->length * 8 / sizeof (ip6_address_t);
1011 tr->segments_left = sr1->segments_left;
1015 tr->num_segments = 0xFF;
1018 if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED))
1020 sr_localsid_trace_t *tr =
1021 vlib_add_trace (vm, node, b2, sizeof (*tr));
1022 tr->num_segments = 0;
1023 clib_memcpy (tr->localsid.as_u8, ls2->localsid.as_u8,
1024 sizeof (tr->localsid.as_u8));
1025 tr->behavior = ls2->behavior;
1026 if (ip2 == vlib_buffer_get_current (b2))
1028 if (ip2->protocol == IP_PROTOCOL_IPV6_ROUTE
1029 && sr2->type == ROUTING_HEADER_TYPE_SR)
1031 clib_memcpy (tr->sr, sr2->segments, sr2->length * 8);
1033 sr2->length * 8 / sizeof (ip6_address_t);
1034 tr->segments_left = sr2->segments_left;
1038 tr->num_segments = 0xFF;
1041 if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED))
1043 sr_localsid_trace_t *tr =
1044 vlib_add_trace (vm, node, b3, sizeof (*tr));
1045 tr->num_segments = 0;
1046 clib_memcpy (tr->localsid.as_u8, ls3->localsid.as_u8,
1047 sizeof (tr->localsid.as_u8));
1048 tr->behavior = ls3->behavior;
1049 if (ip3 == vlib_buffer_get_current (b3))
1051 if (ip3->protocol == IP_PROTOCOL_IPV6_ROUTE
1052 && sr3->type == ROUTING_HEADER_TYPE_SR)
1054 clib_memcpy (tr->sr, sr3->segments, sr3->length * 8);
1056 sr3->length * 8 / sizeof (ip6_address_t);
1057 tr->segments_left = sr3->segments_left;
1061 tr->num_segments = 0xFF;
1064 vlib_increment_combined_counter
1066 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1067 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1068 1, vlib_buffer_length_in_chain (vm, b0));
1070 vlib_increment_combined_counter
1072 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1073 &(sm->sr_ls_valid_counters)), thread_index, ls1 - sm->localsids,
1074 1, vlib_buffer_length_in_chain (vm, b1));
1076 vlib_increment_combined_counter
1078 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1079 &(sm->sr_ls_valid_counters)), thread_index, ls2 - sm->localsids,
1080 1, vlib_buffer_length_in_chain (vm, b2));
1082 vlib_increment_combined_counter
1084 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1085 &(sm->sr_ls_valid_counters)), thread_index, ls3 - sm->localsids,
1086 1, vlib_buffer_length_in_chain (vm, b3));
1088 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
1089 n_left_to_next, bi0, bi1, bi2, bi3,
1090 next0, next1, next2, next3);
1093 /* Single loop for potentially the last three packets */
1094 while (n_left_from > 0 && n_left_to_next > 0)
1099 ip6_ext_header_t *prev0;
1100 ip6_sr_header_t *sr0;
1101 u32 next0 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1102 ip6_sr_localsid_t *ls0;
1109 n_left_to_next -= 1;
1111 b0 = vlib_get_buffer (vm, bi0);
1112 ip0 = vlib_buffer_get_current (b0);
1114 /* Lookup the SR End behavior based on IP DA (adj) */
1116 pool_elt_at_index (sm->localsids,
1117 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1119 /* Find SRH as well as previous header */
1120 ip6_ext_header_find_t (ip0, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE);
1122 /* SRH processing and End variants */
1123 end_decaps_srh_processing (node, b0, ip0, sr0, ls0, &next0);
1125 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1127 sr_localsid_trace_t *tr =
1128 vlib_add_trace (vm, node, b0, sizeof (*tr));
1129 tr->num_segments = 0;
1130 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1131 sizeof (tr->localsid.as_u8));
1132 tr->behavior = ls0->behavior;
1133 if (ip0 == vlib_buffer_get_current (b0))
1135 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1136 && sr0->type == ROUTING_HEADER_TYPE_SR)
1138 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1140 sr0->length * 8 / sizeof (ip6_address_t);
1141 tr->segments_left = sr0->segments_left;
1145 tr->num_segments = 0xFF;
1148 /* Increase the counters */
1149 vlib_increment_combined_counter
1151 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1152 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1153 1, vlib_buffer_length_in_chain (vm, b0));
1155 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1156 n_left_to_next, bi0, next0);
1158 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1160 return from_frame->n_vectors;
1164 VLIB_REGISTER_NODE (sr_localsid_d_node) = {
1165 .function = sr_localsid_d_fn,
1166 .name = "sr-localsid-d",
1167 .vector_size = sizeof (u32),
1168 .format_trace = format_sr_localsid_trace,
1169 .type = VLIB_NODE_TYPE_INTERNAL,
1170 .n_errors = SR_LOCALSID_N_ERROR,
1171 .error_strings = sr_localsid_error_strings,
1172 .n_next_nodes = SR_LOCALSID_N_NEXT,
1174 #define _(s,n) [SR_LOCALSID_NEXT_##s] = n,
1175 foreach_sr_localsid_next
1182 * @brief SR LocalSID graph node. Supports all default SR Endpoint without decaps
1185 sr_localsid_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1186 vlib_frame_t * from_frame)
1188 u32 n_left_from, next_index, *from, *to_next;
1189 ip6_sr_main_t *sm = &sr_main;
1190 from = vlib_frame_vector_args (from_frame);
1191 n_left_from = from_frame->n_vectors;
1192 next_index = node->cached_next_index;
1193 u32 thread_index = vm->thread_index;
1195 while (n_left_from > 0)
1198 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1201 while (n_left_from >= 8 && n_left_to_next >= 4)
1203 u32 bi0, bi1, bi2, bi3;
1204 vlib_buffer_t *b0, *b1, *b2, *b3;
1205 ip6_header_t *ip0, *ip1, *ip2, *ip3;
1206 ip6_sr_header_t *sr0, *sr1, *sr2, *sr3;
1207 ip6_ext_header_t *prev0, *prev1, *prev2, *prev3;
1208 u32 next0, next1, next2, next3;
1209 next0 = next1 = next2 = next3 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1210 ip6_sr_localsid_t *ls0, *ls1, *ls2, *ls3;
1212 /* Prefetch next iteration. */
1214 vlib_buffer_t *p4, *p5, *p6, *p7;
1216 p4 = vlib_get_buffer (vm, from[4]);
1217 p5 = vlib_get_buffer (vm, from[5]);
1218 p6 = vlib_get_buffer (vm, from[6]);
1219 p7 = vlib_get_buffer (vm, from[7]);
1221 /* Prefetch the buffer header and packet for the N+2 loop iteration */
1222 vlib_prefetch_buffer_header (p4, LOAD);
1223 vlib_prefetch_buffer_header (p5, LOAD);
1224 vlib_prefetch_buffer_header (p6, LOAD);
1225 vlib_prefetch_buffer_header (p7, LOAD);
1227 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
1228 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
1229 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
1230 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
1233 to_next[0] = bi0 = from[0];
1234 to_next[1] = bi1 = from[1];
1235 to_next[2] = bi2 = from[2];
1236 to_next[3] = bi3 = from[3];
1240 n_left_to_next -= 4;
1242 b0 = vlib_get_buffer (vm, bi0);
1243 b1 = vlib_get_buffer (vm, bi1);
1244 b2 = vlib_get_buffer (vm, bi2);
1245 b3 = vlib_get_buffer (vm, bi3);
1247 ip0 = vlib_buffer_get_current (b0);
1248 ip1 = vlib_buffer_get_current (b1);
1249 ip2 = vlib_buffer_get_current (b2);
1250 ip3 = vlib_buffer_get_current (b3);
1252 ip6_ext_header_find_t (ip0, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE);
1253 ip6_ext_header_find_t (ip1, prev1, sr1, IP_PROTOCOL_IPV6_ROUTE);
1254 ip6_ext_header_find_t (ip2, prev2, sr2, IP_PROTOCOL_IPV6_ROUTE);
1255 ip6_ext_header_find_t (ip3, prev3, sr3, IP_PROTOCOL_IPV6_ROUTE);
1258 pool_elt_at_index (sm->localsids,
1259 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1261 pool_elt_at_index (sm->localsids,
1262 vnet_buffer (b1)->ip.adj_index[VLIB_TX]);
1264 pool_elt_at_index (sm->localsids,
1265 vnet_buffer (b2)->ip.adj_index[VLIB_TX]);
1267 pool_elt_at_index (sm->localsids,
1268 vnet_buffer (b3)->ip.adj_index[VLIB_TX]);
1270 end_srh_processing (node, b0, ip0, sr0, ls0, &next0, ls0->end_psp,
1272 end_srh_processing (node, b1, ip1, sr1, ls1, &next1, ls1->end_psp,
1274 end_srh_processing (node, b2, ip2, sr2, ls2, &next2, ls2->end_psp,
1276 end_srh_processing (node, b3, ip3, sr3, ls3, &next3, ls3->end_psp,
1279 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1281 sr_localsid_trace_t *tr =
1282 vlib_add_trace (vm, node, b0, sizeof (*tr));
1283 tr->num_segments = 0;
1284 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1285 sizeof (tr->localsid.as_u8));
1286 tr->behavior = ls0->behavior;
1287 if (ip0 == vlib_buffer_get_current (b0))
1289 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1290 && sr0->type == ROUTING_HEADER_TYPE_SR)
1292 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1294 sr0->length * 8 / sizeof (ip6_address_t);
1295 tr->segments_left = sr0->segments_left;
1299 tr->num_segments = 0xFF;
1302 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
1304 sr_localsid_trace_t *tr =
1305 vlib_add_trace (vm, node, b1, sizeof (*tr));
1306 tr->num_segments = 0;
1307 clib_memcpy (tr->localsid.as_u8, ls1->localsid.as_u8,
1308 sizeof (tr->localsid.as_u8));
1309 tr->behavior = ls1->behavior;
1310 if (ip1 == vlib_buffer_get_current (b1))
1312 if (ip1->protocol == IP_PROTOCOL_IPV6_ROUTE
1313 && sr1->type == ROUTING_HEADER_TYPE_SR)
1315 clib_memcpy (tr->sr, sr1->segments, sr1->length * 8);
1317 sr1->length * 8 / sizeof (ip6_address_t);
1318 tr->segments_left = sr1->segments_left;
1322 tr->num_segments = 0xFF;
1325 if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED))
1327 sr_localsid_trace_t *tr =
1328 vlib_add_trace (vm, node, b2, sizeof (*tr));
1329 tr->num_segments = 0;
1330 clib_memcpy (tr->localsid.as_u8, ls2->localsid.as_u8,
1331 sizeof (tr->localsid.as_u8));
1332 tr->behavior = ls2->behavior;
1333 if (ip2 == vlib_buffer_get_current (b2))
1335 if (ip2->protocol == IP_PROTOCOL_IPV6_ROUTE
1336 && sr2->type == ROUTING_HEADER_TYPE_SR)
1338 clib_memcpy (tr->sr, sr2->segments, sr2->length * 8);
1340 sr2->length * 8 / sizeof (ip6_address_t);
1341 tr->segments_left = sr2->segments_left;
1345 tr->num_segments = 0xFF;
1348 if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED))
1350 sr_localsid_trace_t *tr =
1351 vlib_add_trace (vm, node, b3, sizeof (*tr));
1352 tr->num_segments = 0;
1353 clib_memcpy (tr->localsid.as_u8, ls3->localsid.as_u8,
1354 sizeof (tr->localsid.as_u8));
1355 tr->behavior = ls3->behavior;
1356 if (ip3 == vlib_buffer_get_current (b3))
1358 if (ip3->protocol == IP_PROTOCOL_IPV6_ROUTE
1359 && sr3->type == ROUTING_HEADER_TYPE_SR)
1361 clib_memcpy (tr->sr, sr3->segments, sr3->length * 8);
1363 sr3->length * 8 / sizeof (ip6_address_t);
1364 tr->segments_left = sr3->segments_left;
1368 tr->num_segments = 0xFF;
1371 vlib_increment_combined_counter
1373 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1374 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1375 1, vlib_buffer_length_in_chain (vm, b0));
1377 vlib_increment_combined_counter
1379 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1380 &(sm->sr_ls_valid_counters)), thread_index, ls1 - sm->localsids,
1381 1, vlib_buffer_length_in_chain (vm, b1));
1383 vlib_increment_combined_counter
1385 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1386 &(sm->sr_ls_valid_counters)), thread_index, ls2 - sm->localsids,
1387 1, vlib_buffer_length_in_chain (vm, b2));
1389 vlib_increment_combined_counter
1391 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1392 &(sm->sr_ls_valid_counters)), thread_index, ls3 - sm->localsids,
1393 1, vlib_buffer_length_in_chain (vm, b3));
1395 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
1396 n_left_to_next, bi0, bi1, bi2, bi3,
1397 next0, next1, next2, next3);
1400 /* Single loop for potentially the last three packets */
1401 while (n_left_from > 0 && n_left_to_next > 0)
1405 ip6_header_t *ip0 = 0;
1406 ip6_ext_header_t *prev0;
1407 ip6_sr_header_t *sr0;
1408 u32 next0 = SR_LOCALSID_NEXT_IP6_LOOKUP;
1409 ip6_sr_localsid_t *ls0;
1416 n_left_to_next -= 1;
1418 b0 = vlib_get_buffer (vm, bi0);
1419 ip0 = vlib_buffer_get_current (b0);
1420 ip6_ext_header_find_t (ip0, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE);
1422 /* Lookup the SR End behavior based on IP DA (adj) */
1424 pool_elt_at_index (sm->localsids,
1425 vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
1427 /* SRH processing */
1428 end_srh_processing (node, b0, ip0, sr0, ls0, &next0, ls0->end_psp,
1431 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1433 sr_localsid_trace_t *tr =
1434 vlib_add_trace (vm, node, b0, sizeof (*tr));
1435 tr->num_segments = 0;
1436 clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
1437 sizeof (tr->localsid.as_u8));
1438 tr->behavior = ls0->behavior;
1439 if (ip0 == vlib_buffer_get_current (b0))
1441 if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
1442 && sr0->type == ROUTING_HEADER_TYPE_SR)
1444 clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
1446 sr0->length * 8 / sizeof (ip6_address_t);
1447 tr->segments_left = sr0->segments_left;
1451 tr->num_segments = 0xFF;
1454 vlib_increment_combined_counter
1456 SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
1457 &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
1458 1, vlib_buffer_length_in_chain (vm, b0));
1460 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1461 n_left_to_next, bi0, next0);
1463 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1465 return from_frame->n_vectors;
1469 VLIB_REGISTER_NODE (sr_localsid_node) = {
1470 .function = sr_localsid_fn,
1471 .name = "sr-localsid",
1472 .vector_size = sizeof (u32),
1473 .format_trace = format_sr_localsid_trace,
1474 .type = VLIB_NODE_TYPE_INTERNAL,
1475 .n_errors = SR_LOCALSID_N_ERROR,
1476 .error_strings = sr_localsid_error_strings,
1477 .n_next_nodes = SR_LOCALSID_N_NEXT,
1479 #define _(s,n) [SR_LOCALSID_NEXT_##s] = n,
1480 foreach_sr_localsid_next
1487 format_sr_dpo (u8 * s, va_list * args)
1489 index_t index = va_arg (*args, index_t);
1490 CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
1492 return (format (s, "SR: localsid_index:[%d]", index));
1495 const static dpo_vft_t sr_loc_vft = {
1496 .dv_lock = sr_dpo_lock,
1497 .dv_unlock = sr_dpo_unlock,
1498 .dv_format = format_sr_dpo,
1501 const static char *const sr_loc_ip6_nodes[] = {
1506 const static char *const *const sr_loc_nodes[DPO_PROTO_NUM] = {
1507 [DPO_PROTO_IP6] = sr_loc_ip6_nodes,
1510 const static char *const sr_loc_d_ip6_nodes[] = {
1515 const static char *const *const sr_loc_d_nodes[DPO_PROTO_NUM] = {
1516 [DPO_PROTO_IP6] = sr_loc_d_ip6_nodes,
1520 /*************************** SR LocalSID plugins ******************************/
1522 * @brief SR LocalSID plugin registry
1525 sr_localsid_register_function (vlib_main_t * vm, u8 * fn_name,
1526 u8 * keyword_str, u8 * def_str,
1527 u8 * params_str, dpo_type_t * dpo,
1528 format_function_t * ls_format,
1529 unformat_function_t * ls_unformat,
1530 sr_plugin_callback_t * creation_fn,
1531 sr_plugin_callback_t * removal_fn)
1533 ip6_sr_main_t *sm = &sr_main;
1536 sr_localsid_fn_registration_t *plugin;
1538 /* Did this function exist? If so update it */
1539 p = hash_get_mem (sm->plugin_functions_by_key, fn_name);
1542 plugin = pool_elt_at_index (sm->plugin_functions, p[0]);
1544 /* Else create a new one and set hash key */
1547 pool_get (sm->plugin_functions, plugin);
1548 hash_set_mem (sm->plugin_functions_by_key, fn_name,
1549 plugin - sm->plugin_functions);
1552 clib_memset (plugin, 0, sizeof (*plugin));
1554 plugin->sr_localsid_function_number = (plugin - sm->plugin_functions);
1555 plugin->sr_localsid_function_number += SR_BEHAVIOR_LAST;
1556 plugin->ls_format = ls_format;
1557 plugin->ls_unformat = ls_unformat;
1558 plugin->creation = creation_fn;
1559 plugin->removal = removal_fn;
1560 clib_memcpy (&plugin->dpo, dpo, sizeof (dpo_type_t));
1561 plugin->function_name = format (0, "%s%c", fn_name, 0);
1562 plugin->keyword_str = format (0, "%s%c", keyword_str, 0);
1563 plugin->def_str = format (0, "%s%c", def_str, 0);
1564 plugin->params_str = format (0, "%s%c", params_str, 0);
1566 return plugin->sr_localsid_function_number;
1570 * @brief CLI function to 'show' all available SR LocalSID behaviors
1572 static clib_error_t *
1573 show_sr_localsid_behaviors_command_fn (vlib_main_t * vm,
1574 unformat_input_t * input,
1575 vlib_cli_command_t * cmd)
1577 ip6_sr_main_t *sm = &sr_main;
1578 sr_localsid_fn_registration_t *plugin;
1579 sr_localsid_fn_registration_t **plugins_vec = 0;
1582 vlib_cli_output (vm,
1583 "SR LocalSIDs behaviors:\n-----------------------\n\n");
1586 pool_foreach (plugin, sm->plugin_functions,
1587 ({ vec_add1 (plugins_vec, plugin); }));
1590 /* Print static behaviors */
1591 vlib_cli_output (vm, "Default behaviors:\n"
1592 "\tEnd\t-> Endpoint.\n"
1593 "\tEnd.X\t-> Endpoint with Layer-3 cross-connect.\n"
1594 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
1595 "\tEnd.T\t-> Endpoint with specific IPv6 table lookup.\n"
1596 "\t\tParameters: '<fib_table>'\n"
1597 "\tEnd.DX2\t-> Endpoint with decapsulation and Layer-2 cross-connect.\n"
1598 "\t\tParameters: '<iface>'\n"
1599 "\tEnd.DX6\t-> Endpoint with decapsulation and IPv6 cross-connect.\n"
1600 "\t\tParameters: '<iface> <ip6_next_hop>'\n"
1601 "\tEnd.DX4\t-> Endpoint with decapsulation and IPv4 cross-connect.\n"
1602 "\t\tParameters: '<iface> <ip4_next_hop>'\n"
1603 "\tEnd.DT6\t-> Endpoint with decapsulation and specific IPv6 table lookup.\n"
1604 "\t\tParameters: '<ip6_fib_table>'\n"
1605 "\tEnd.DT4\t-> Endpoint with decapsulation and specific IPv4 table lookup.\n"
1606 "\t\tParameters: '<ip4_fib_table>'\n");
1607 vlib_cli_output (vm, "Plugin behaviors:\n");
1608 for (i = 0; i < vec_len (plugins_vec); i++)
1610 plugin = plugins_vec[i];
1611 vlib_cli_output (vm, "\t%s\t-> %s.\n", plugin->keyword_str,
1613 vlib_cli_output (vm, "\t\tParameters: '%s'\n", plugin->params_str);
1619 VLIB_CLI_COMMAND (show_sr_localsid_behaviors_command, static) = {
1620 .path = "show sr localsids behaviors",
1621 .short_help = "show sr localsids behaviors",
1622 .function = show_sr_localsid_behaviors_command_fn,
1627 * @brief SR LocalSID initialization
1630 sr_localsids_init (vlib_main_t * vm)
1632 /* Init memory for function keys */
1633 ip6_sr_main_t *sm = &sr_main;
1634 mhash_init (&sm->sr_localsids_index_hash, sizeof (uword),
1635 sizeof (ip6_address_t));
1636 /* Init SR behaviors DPO type */
1637 sr_localsid_dpo_type = dpo_register_new_type (&sr_loc_vft, sr_loc_nodes);
1638 /* Init SR behaviors DPO type */
1639 sr_localsid_d_dpo_type =
1640 dpo_register_new_type (&sr_loc_vft, sr_loc_d_nodes);
1641 /* Init memory for localsid plugins */
1642 sm->plugin_functions_by_key = hash_create_string (0, sizeof (uword));
1646 VLIB_INIT_FUNCTION (sr_localsids_init);
1648 * fd.io coding-style-patch-verification: ON
1651 * eval: (c-set-style "gnu")