2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * node.c: srp packet processing
18 * Copyright (c) 2011 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vlib/vlib.h>
41 #include <vnet/ip/ip_packet.h> /* for ip_csum_fold */
42 #include <vnet/srp/srp.h>
48 static u8 * format_srp_input_trace (u8 * s, va_list * va)
50 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
51 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
52 srp_input_trace_t * t = va_arg (*va, srp_input_trace_t *);
54 s = format (s, "%U", format_srp_header, t->packet_data);
61 SRP_INPUT_NEXT_ETHERNET_INPUT,
62 SRP_INPUT_NEXT_CONTROL,
70 } srp_input_disposition_t;
72 static srp_input_disposition_t srp_input_disposition_by_mode[8] = {
73 [SRP_MODE_reserved0] = {
74 .next_index = SRP_INPUT_NEXT_ERROR,
75 .error = SRP_ERROR_UNKNOWN_MODE,
77 [SRP_MODE_reserved1] = {
78 .next_index = SRP_INPUT_NEXT_ERROR,
79 .error = SRP_ERROR_UNKNOWN_MODE,
81 [SRP_MODE_reserved2] = {
82 .next_index = SRP_INPUT_NEXT_ERROR,
83 .error = SRP_ERROR_UNKNOWN_MODE,
85 [SRP_MODE_reserved3] = {
86 .next_index = SRP_INPUT_NEXT_ERROR,
87 .error = SRP_ERROR_UNKNOWN_MODE,
89 [SRP_MODE_keep_alive] = {
90 .next_index = SRP_INPUT_NEXT_ERROR,
91 .error = SRP_ERROR_KEEP_ALIVE_DROPPED,
94 .next_index = SRP_INPUT_NEXT_ETHERNET_INPUT,
95 .buffer_advance = sizeof (srp_header_t),
97 [SRP_MODE_control_pass_to_host] = {
98 .next_index = SRP_INPUT_NEXT_CONTROL,
100 [SRP_MODE_control_locally_buffered_for_host] = {
101 .next_index = SRP_INPUT_NEXT_CONTROL,
106 srp_input (vlib_main_t * vm,
107 vlib_node_runtime_t * node,
108 vlib_frame_t * from_frame)
110 vnet_main_t * vnm = vnet_get_main();
111 srp_main_t * sm = &srp_main;
112 u32 n_left_from, next_index, * from, * to_next;
114 from = vlib_frame_vector_args (from_frame);
115 n_left_from = from_frame->n_vectors;
117 if (node->flags & VLIB_NODE_FLAG_TRACE)
118 vlib_trace_frame_buffers_only (vm, node,
122 sizeof (srp_input_trace_t));
124 next_index = node->cached_next_index;
126 while (n_left_from > 0)
130 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
132 while (n_left_from >= 4 && n_left_to_next >= 2)
134 u32 bi0, bi1, sw_if_index0, sw_if_index1;
135 vlib_buffer_t * b0, * b1;
136 u8 next0, next1, error0, error1;
137 srp_header_t * s0, * s1;
138 srp_input_disposition_t * d0, * d1;
139 vnet_hw_interface_t * hi0, * hi1;
140 srp_interface_t * si0, * si1;
142 /* Prefetch next iteration. */
144 vlib_buffer_t * b2, * b3;
146 b2 = vlib_get_buffer (vm, from[2]);
147 b3 = vlib_get_buffer (vm, from[3]);
149 vlib_prefetch_buffer_header (b2, LOAD);
150 vlib_prefetch_buffer_header (b3, LOAD);
152 CLIB_PREFETCH (b2->data, sizeof (srp_header_t), LOAD);
153 CLIB_PREFETCH (b3->data, sizeof (srp_header_t), LOAD);
165 b0 = vlib_get_buffer (vm, bi0);
166 b1 = vlib_get_buffer (vm, bi1);
168 s0 = (void *) (b0->data + b0->current_data);
169 s1 = (void *) (b1->data + b1->current_data);
171 /* Data packets are always assigned to side A (outer ring) interface. */
172 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
173 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
175 hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
176 hi1 = vnet_get_sup_hw_interface (vnm, sw_if_index1);
178 si0 = pool_elt_at_index (sm->interface_pool, hi0->hw_instance);
179 si1 = pool_elt_at_index (sm->interface_pool, hi1->hw_instance);
181 sw_if_index0 = (s0->mode == SRP_MODE_data
182 ? si0->rings[SRP_RING_OUTER].sw_if_index
184 sw_if_index1 = (s1->mode == SRP_MODE_data
185 ? si1->rings[SRP_RING_OUTER].sw_if_index
188 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0;
189 vnet_buffer (b1)->sw_if_index[VLIB_RX] = sw_if_index1;
191 d0 = srp_input_disposition_by_mode + s0->mode;
192 d1 = srp_input_disposition_by_mode + s1->mode;
194 next0 = d0->next_index;
195 next1 = d1->next_index;
200 vlib_buffer_advance (b0, d0->buffer_advance);
201 vlib_buffer_advance (b1, d1->buffer_advance);
203 b0->error = node->errors[error0];
204 b1->error = node->errors[error1];
206 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
207 to_next, n_left_to_next,
208 bi0, bi1, next0, next1);
211 while (n_left_from > 0 && n_left_to_next > 0)
213 u32 bi0, sw_if_index0;
217 srp_input_disposition_t * d0;
218 srp_interface_t * si0;
219 vnet_hw_interface_t * hi0;
228 b0 = vlib_get_buffer (vm, bi0);
230 s0 = (void *) (b0->data + b0->current_data);
232 /* Data packets are always assigned to side A (outer ring) interface. */
233 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
235 hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
237 si0 = pool_elt_at_index (sm->interface_pool, hi0->hw_instance);
239 sw_if_index0 = (s0->mode == SRP_MODE_data
240 ? si0->rings[SRP_RING_OUTER].sw_if_index
243 vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0;
245 d0 = srp_input_disposition_by_mode + s0->mode;
247 next0 = d0->next_index;
251 vlib_buffer_advance (b0, d0->buffer_advance);
253 b0->error = node->errors[error0];
255 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
256 to_next, n_left_to_next,
260 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
263 return from_frame->n_vectors;
266 static char * srp_error_strings[] = {
272 static vlib_node_registration_t srp_input_node = {
273 .function = srp_input,
275 /* Takes a vector of packets. */
276 .vector_size = sizeof (u32),
278 .n_errors = SRP_N_ERROR,
279 .error_strings = srp_error_strings,
281 .n_next_nodes = SRP_INPUT_N_NEXT,
283 [SRP_INPUT_NEXT_ERROR] = "error-drop",
284 [SRP_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",
285 [SRP_INPUT_NEXT_CONTROL] = "srp-control",
288 .format_buffer = format_srp_header_with_length,
289 .format_trace = format_srp_input_trace,
290 .unformat_buffer = unformat_srp_header,
294 srp_topology_packet (vlib_main_t * vm, u32 sw_if_index, u8 ** contents)
296 vnet_main_t * vnm = vnet_get_main();
297 vnet_hw_interface_t * hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
298 srp_topology_header_t * t;
299 srp_topology_mac_binding_t * mb;
302 t = (void *) *contents;
304 nb = clib_net_to_host_u16 (t->n_bytes_of_data_that_follows);
305 nmb = (nb - sizeof (t->originator_address)) / sizeof (mb[0]);
306 if (vec_len (*contents) < sizeof (t[0]) + nmb * sizeof (mb[0]))
307 return SRP_ERROR_TOPOLOGY_BAD_LENGTH;
309 /* Fill in our source MAC address. */
310 clib_memcpy (t->ethernet.src_address, hi->hw_address, vec_len (hi->hw_address));
312 /* Make space for our MAC binding. */
313 vec_resize (*contents, sizeof (srp_topology_mac_binding_t));
314 t = (void *) *contents;
315 t->n_bytes_of_data_that_follows = clib_host_to_net_u16 (nb + sizeof (mb[0]));
317 mb = t->bindings + nmb;
320 ((t->srp.is_inner_ring ? SRP_TOPOLOGY_MAC_BINDING_FLAG_IS_INNER_RING : 0)
321 | (/* is wrapped FIXME */ 0));
322 clib_memcpy (mb->address, hi->hw_address, vec_len (hi->hw_address));
325 = ~ip_csum_fold (ip_incremental_checksum (0, &t->control,
326 vec_len (*contents) - STRUCT_OFFSET_OF (srp_generic_control_header_t, control)));
329 vlib_frame_t * f = vlib_get_frame_to_node (vm, hi->output_node_index);
331 u32 * to_next = vlib_frame_vector_args (f);
334 bi = vlib_buffer_add_data (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
335 /* buffer to append to */ 0,
336 *contents, vec_len (*contents));
337 b = vlib_get_buffer (vm, bi);
338 vnet_buffer (b)->sw_if_index[VLIB_RX] = vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
341 vlib_put_frame_to_node (vm, hi->output_node_index, f);
344 return SRP_ERROR_CONTROL_PACKETS_PROCESSED;
347 typedef uword (srp_control_handler_function_t) (vlib_main_t * vm,
352 srp_control_input (vlib_main_t * vm,
353 vlib_node_runtime_t * node,
354 vlib_frame_t * from_frame)
356 u32 n_left_from, next_index, * from, * to_next;
357 vlib_node_runtime_t * error_node;
358 static u8 * contents;
360 error_node = vlib_node_get_runtime (vm, srp_input_node.index);
362 from = vlib_frame_vector_args (from_frame);
363 n_left_from = from_frame->n_vectors;
365 if (node->flags & VLIB_NODE_FLAG_TRACE)
366 vlib_trace_frame_buffers_only (vm, node,
370 sizeof (srp_input_trace_t));
372 next_index = node->cached_next_index;
374 while (n_left_from > 0)
378 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
380 while (n_left_from > 0 && n_left_to_next > 0)
382 u32 bi0, l2_len0, l3_len0;
385 srp_generic_control_header_t * s0;
394 b0 = vlib_get_buffer (vm, bi0);
396 s0 = (void *) (b0->data + b0->current_data);
397 l2_len0 = vlib_buffer_length_in_chain (vm, b0);
398 l3_len0 = l2_len0 - STRUCT_OFFSET_OF (srp_generic_control_header_t, control);
400 error0 = SRP_ERROR_CONTROL_PACKETS_PROCESSED;
402 error0 = s0->control.version != 0 ? SRP_ERROR_CONTROL_VERSION_NON_ZERO : error0;
405 u16 save0 = s0->control.checksum;
407 s0->control.checksum = 0;
408 computed0 = ~ip_csum_fold (ip_incremental_checksum (0, &s0->control, l3_len0));
409 error0 = save0 != computed0 ? SRP_ERROR_CONTROL_BAD_CHECKSUM : error0;
412 if (error0 == SRP_ERROR_CONTROL_PACKETS_PROCESSED)
414 static srp_control_handler_function_t * t[SRP_N_CONTROL_PACKET_TYPE] = {
415 [SRP_CONTROL_PACKET_TYPE_topology] = srp_topology_packet,
417 srp_control_handler_function_t * f;
420 if (s0->control.type < ARRAY_LEN (t))
421 f = t[s0->control.type];
425 vec_validate (contents, l2_len0 - 1);
426 vlib_buffer_contents (vm, bi0, contents);
427 error0 = f (vm, vnet_buffer (b0)->sw_if_index[VLIB_RX], &contents);
430 error0 = SRP_ERROR_UNKNOWN_CONTROL;
433 b0->error = error_node->errors[error0];
436 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
437 to_next, n_left_to_next,
441 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
444 return from_frame->n_vectors;
447 static vlib_node_registration_t srp_control_input_node = {
448 .function = srp_control_input,
449 .name = "srp-control",
450 /* Takes a vector of packets. */
451 .vector_size = sizeof (u32),
458 .format_buffer = format_srp_header_with_length,
459 .format_trace = format_srp_input_trace,
460 .unformat_buffer = unformat_srp_header,
463 static u8 * format_srp_ips_request_type (u8 * s, va_list * args)
465 u32 x = va_arg (*args, u32);
469 #define _(f,n) case SRP_IPS_REQUEST_##f: t = #f; break;
470 foreach_srp_ips_request_type
473 return format (s, "unknown 0x%x", x);
475 return format (s, "%U", format_c_identifier, t);
478 static u8 * format_srp_ips_status (u8 * s, va_list * args)
480 u32 x = va_arg (*args, u32);
484 #define _(f,n) case SRP_IPS_STATUS_##f: t = #f; break;
485 foreach_srp_ips_status
488 return format (s, "unknown 0x%x", x);
490 return format (s, "%U", format_c_identifier, t);
493 static u8 * format_srp_ips_state (u8 * s, va_list * args)
495 u32 x = va_arg (*args, u32);
499 #define _(f) case SRP_IPS_STATE_##f: t = #f; break;
500 foreach_srp_ips_state
503 return format (s, "unknown 0x%x", x);
505 return format (s, "%U", format_c_identifier, t);
508 static u8 * format_srp_ring (u8 * s, va_list * args)
510 u32 ring = va_arg (*args, u32);
511 return format (s, "%s", ring == SRP_RING_INNER ? "inner" : "outer");
514 static u8 * format_srp_ips_header (u8 * s, va_list * args)
516 srp_ips_header_t * h = va_arg (*args, srp_ips_header_t *);
518 s = format (s, "%U, %U, %U, %s-path",
519 format_srp_ips_request_type, h->request_type,
520 format_ethernet_address, h->originator_address,
521 format_srp_ips_status, h->status,
522 h->is_long_path ? "long" : "short");
527 static u8 * format_srp_interface (u8 * s, va_list * args)
529 srp_interface_t * si = va_arg (*args, srp_interface_t *);
530 srp_interface_ring_t * ir;
532 s = format (s, "address %U, IPS state %U",
533 format_ethernet_address, si->my_address,
534 format_srp_ips_state, si->current_ips_state);
535 for (ir = si->rings; ir < si->rings + SRP_N_RING; ir++)
536 if (ir->rx_neighbor_address_valid)
537 s = format (s, ", %U neighbor %U",
538 format_srp_ring, ir->ring,
539 format_ethernet_address, ir->rx_neighbor_address);
544 u8 * format_srp_device (u8 * s, va_list * args)
546 u32 hw_if_index = va_arg (*args, u32);
547 CLIB_UNUSED (int verbose) = va_arg (*args, int);
548 vnet_main_t * vnm = vnet_get_main();
549 srp_main_t * sm = &srp_main;
550 vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, hw_if_index);
551 srp_interface_t * si = pool_elt_at_index (sm->interface_pool, hi->hw_instance);
552 return format (s, "%U", format_srp_interface, si);
555 always_inline srp_interface_t *
556 srp_get_interface (u32 sw_if_index, srp_ring_type_t * ring)
558 vnet_main_t * vnm = vnet_get_main();
559 srp_main_t * sm = &srp_main;
560 vnet_hw_interface_t * hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
561 srp_interface_t * si;
563 ASSERT (hi->hw_class_index == srp_hw_interface_class.index);
564 si = pool_elt_at_index (sm->interface_pool, hi->hw_instance);
566 ASSERT (si->rings[SRP_RING_INNER].hw_if_index == hi->hw_if_index
567 || si->rings[SRP_RING_OUTER].hw_if_index == hi->hw_if_index);
570 (hi->hw_if_index == si->rings[SRP_RING_INNER].hw_if_index
577 static void init_ips_packet (srp_interface_t * si,
578 srp_ring_type_t tx_ring,
579 srp_ips_header_t * i)
581 memset (i, 0, sizeof (i[0]));
584 i->srp.is_inner_ring = tx_ring;
586 i->srp.mode = SRP_MODE_control_locally_buffered_for_host;
587 srp_header_compute_parity (&i->srp);
589 clib_memcpy (&i->ethernet.src_address, &si->my_address, sizeof (si->my_address));
590 i->ethernet.type = clib_host_to_net_u16 (ETHERNET_TYPE_SRP_CONTROL);
592 /* Checksum will be filled in later. */
593 i->control.version = 0;
594 i->control.type = SRP_CONTROL_PACKET_TYPE_ips;
595 i->control.ttl = 255;
597 clib_memcpy (&i->originator_address, &si->my_address, sizeof (si->my_address));
600 static void tx_ips_packet (srp_interface_t * si,
601 srp_ring_type_t tx_ring,
602 srp_ips_header_t * i)
604 srp_main_t * sm = &srp_main;
605 vnet_main_t * vnm = vnet_get_main();
606 vlib_main_t * vm = sm->vlib_main;
607 vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, si->rings[tx_ring].hw_if_index);
612 if (! vnet_sw_interface_is_admin_up (vnm, hi->sw_if_index))
614 if (hi->hw_class_index != srp_hw_interface_class.index)
618 = ~ip_csum_fold (ip_incremental_checksum (0, &i->control,
619 sizeof (i[0]) - STRUCT_OFFSET_OF (srp_ips_header_t, control)));
621 bi = vlib_buffer_add_data (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
622 /* buffer to append to */ 0,
627 clib_warning ("%U %U",
628 format_vnet_sw_if_index_name, vnm, hi->sw_if_index,
629 format_srp_ips_header, i);
631 b = vlib_get_buffer (vm, bi);
632 vnet_buffer (b)->sw_if_index[VLIB_RX] = vnet_buffer (b)->sw_if_index[VLIB_TX] = hi->sw_if_index;
634 f = vlib_get_frame_to_node (vm, hi->output_node_index);
635 to_next = vlib_frame_vector_args (f);
638 vlib_put_frame_to_node (vm, hi->output_node_index, f);
641 static void serialize_srp_interface_state_msg (serialize_main_t * m, va_list * va)
643 srp_interface_t * si = va_arg (*va, srp_interface_t *);
644 srp_main_t * sm = &srp_main;
647 ASSERT (! pool_is_free (sm->interface_pool, si));
648 serialize_integer (m, si - sm->interface_pool, sizeof (u32));
649 serialize_likely_small_unsigned_integer (m, si->current_ips_state);
650 for (r = 0; r < SRP_N_RING; r++)
652 srp_interface_ring_t * ir = &si->rings[r];
654 serialize_likely_small_unsigned_integer (m, ir->rx_neighbor_address_valid);
655 if (ir->rx_neighbor_address_valid)
657 p = serialize_get (m, sizeof (ir->rx_neighbor_address));
658 clib_memcpy (p, ir->rx_neighbor_address, sizeof (ir->rx_neighbor_address));
660 serialize_likely_small_unsigned_integer (m, ir->waiting_to_restore);
661 if (ir->waiting_to_restore)
662 serialize (m, serialize_f64, ir->wait_to_restore_start_time);
666 static void unserialize_srp_interface_state_msg (serialize_main_t * m, va_list * va)
668 CLIB_UNUSED (mc_main_t * mcm) = va_arg (*va, mc_main_t *);
669 srp_main_t * sm = &srp_main;
670 srp_interface_t * si;
673 unserialize_integer (m, &si_index, sizeof (u32));
674 si = pool_elt_at_index (sm->interface_pool, si_index);
675 si->current_ips_state = unserialize_likely_small_unsigned_integer (m);
676 for (r = 0; r < SRP_N_RING; r++)
678 srp_interface_ring_t * ir = &si->rings[r];
680 ir->rx_neighbor_address_valid = unserialize_likely_small_unsigned_integer (m);
681 if (ir->rx_neighbor_address_valid)
683 p = unserialize_get (m, sizeof (ir->rx_neighbor_address));
684 clib_memcpy (ir->rx_neighbor_address, p, sizeof (ir->rx_neighbor_address));
686 ir->waiting_to_restore = unserialize_likely_small_unsigned_integer (m);
687 if (ir->waiting_to_restore)
688 unserialize (m, unserialize_f64, &ir->wait_to_restore_start_time);
692 MC_SERIALIZE_MSG (srp_interface_state_msg, static) = {
693 .name = "vnet_srp_interface_state",
694 .serialize = serialize_srp_interface_state_msg,
695 .unserialize = unserialize_srp_interface_state_msg,
698 static int requests_switch (srp_ips_request_type_t r)
701 [SRP_IPS_REQUEST_forced_switch] = 1,
702 [SRP_IPS_REQUEST_manual_switch] = 1,
703 [SRP_IPS_REQUEST_signal_fail] = 1,
704 [SRP_IPS_REQUEST_signal_degrade] = 1,
706 return (int) r < ARRAY_LEN (t) ? t[r] : 0;
709 /* Called when an IPS control packet is received on given interface. */
710 void srp_ips_rx_packet (u32 sw_if_index, srp_ips_header_t * h)
712 vnet_main_t * vnm = vnet_get_main();
713 vlib_main_t * vm = srp_main.vlib_main;
714 srp_ring_type_t rx_ring;
715 srp_interface_t * si = srp_get_interface (sw_if_index, &rx_ring);
716 srp_interface_ring_t * ir = &si->rings[rx_ring];
717 int si_needs_broadcast = 0;
721 clib_warning ("%U %U %U",
722 format_time_interval, "h:m:s:u", vlib_time_now (vm),
723 format_vnet_sw_if_index_name, vnm, sw_if_index,
724 format_srp_ips_header, h);
726 /* Ignore self-generated IPS packets. */
727 if (! memcmp (h->originator_address, si->my_address, sizeof (h->originator_address)))
730 /* Learn neighbor address from short path messages. */
731 if (! h->is_long_path)
733 if (ir->rx_neighbor_address_valid
734 && memcmp (ir->rx_neighbor_address, h->originator_address, sizeof (ir->rx_neighbor_address)))
738 ir->rx_neighbor_address_valid = 1;
739 clib_memcpy (ir->rx_neighbor_address, h->originator_address, sizeof (ir->rx_neighbor_address));
742 switch (si->current_ips_state)
744 case SRP_IPS_STATE_idle:
745 /* Received {REQ,NEIGHBOR,W,S} in idle state: wrap. */
746 if (requests_switch (h->request_type)
748 && h->status == SRP_IPS_STATUS_wrapped)
750 srp_ips_header_t to_tx[2];
752 si_needs_broadcast = 1;
753 si->current_ips_state = SRP_IPS_STATE_wrapped;
754 si->hw_wrap_function (si->rings[SRP_SIDE_A].hw_if_index, /* enable_wrap */ 1);
755 si->hw_wrap_function (si->rings[SRP_SIDE_B].hw_if_index, /* enable_wrap */ 1);
757 init_ips_packet (si, rx_ring ^ 0, &to_tx[0]);
758 to_tx[0].request_type = SRP_IPS_REQUEST_idle;
759 to_tx[0].status = SRP_IPS_STATUS_wrapped;
760 to_tx[0].is_long_path = 0;
761 tx_ips_packet (si, rx_ring ^ 0, &to_tx[0]);
763 init_ips_packet (si, rx_ring ^ 1, &to_tx[1]);
764 to_tx[1].request_type = h->request_type;
765 to_tx[1].status = SRP_IPS_STATUS_wrapped;
766 to_tx[1].is_long_path = 1;
767 tx_ips_packet (si, rx_ring ^ 1, &to_tx[1]);
771 case SRP_IPS_STATE_wrapped:
772 if (! h->is_long_path
773 && h->request_type == SRP_IPS_REQUEST_idle
774 && h->status == SRP_IPS_STATUS_idle)
776 si_needs_broadcast = 1;
777 si->current_ips_state = SRP_IPS_STATE_idle;
778 si->hw_wrap_function (si->rings[SRP_SIDE_A].hw_if_index, /* enable_wrap */ 0);
779 si->hw_wrap_function (si->rings[SRP_SIDE_B].hw_if_index, /* enable_wrap */ 0);
783 case SRP_IPS_STATE_pass_thru:
793 if (vm->mc_main && si_needs_broadcast)
794 mc_serialize (vm->mc_main, &srp_interface_state_msg, si);
797 /* Preform local IPS request on given interface. */
798 void srp_ips_local_request (u32 sw_if_index, srp_ips_request_type_t request)
800 vnet_main_t * vnm = vnet_get_main();
801 srp_main_t * sm = &srp_main;
802 vlib_main_t * vm = sm->vlib_main;
803 srp_ring_type_t rx_ring;
804 srp_interface_t * si = srp_get_interface (sw_if_index, &rx_ring);
805 srp_interface_ring_t * ir = &si->rings[rx_ring];
806 int si_needs_broadcast = 0;
808 if (request == SRP_IPS_REQUEST_wait_to_restore)
810 if (si->current_ips_state != SRP_IPS_STATE_wrapped)
812 if (! ir->waiting_to_restore)
814 ir->wait_to_restore_start_time = vlib_time_now (sm->vlib_main);
815 ir->waiting_to_restore = 1;
816 si_needs_broadcast = 1;
821 /* FIXME handle local signal fail. */
822 si_needs_broadcast = ir->waiting_to_restore;
823 ir->wait_to_restore_start_time = 0;
824 ir->waiting_to_restore = 0;
829 clib_warning ("%U %U",
830 format_vnet_sw_if_index_name, vnm, sw_if_index,
831 format_srp_ips_request_type, request);
833 if (vm->mc_main && si_needs_broadcast)
834 mc_serialize (vm->mc_main, &srp_interface_state_msg, si);
837 static void maybe_send_ips_message (srp_interface_t * si)
839 srp_main_t * sm = &srp_main;
840 srp_ips_header_t to_tx[2];
841 srp_ring_type_t rx_ring = SRP_RING_OUTER;
842 srp_interface_ring_t * r0 = &si->rings[rx_ring ^ 0];
843 srp_interface_ring_t * r1 = &si->rings[rx_ring ^ 1];
844 f64 now = vlib_time_now (sm->vlib_main);
846 if (! si->ips_process_enable)
849 if (si->current_ips_state == SRP_IPS_STATE_wrapped
850 && r0->waiting_to_restore
851 && r1->waiting_to_restore
852 && now >= r0->wait_to_restore_start_time + si->config.wait_to_restore_idle_delay
853 && now >= r1->wait_to_restore_start_time + si->config.wait_to_restore_idle_delay)
855 si->current_ips_state = SRP_IPS_STATE_idle;
856 r0->waiting_to_restore = r1->waiting_to_restore = 0;
857 r0->wait_to_restore_start_time = r1->wait_to_restore_start_time = 0;
860 if (si->current_ips_state != SRP_IPS_STATE_idle)
863 init_ips_packet (si, rx_ring ^ 0, &to_tx[0]);
864 init_ips_packet (si, rx_ring ^ 1, &to_tx[1]);
866 if (si->current_ips_state == SRP_IPS_STATE_idle)
868 to_tx[0].request_type = to_tx[1].request_type = SRP_IPS_REQUEST_idle;
869 to_tx[0].status = to_tx[1].status = SRP_IPS_STATUS_idle;
870 to_tx[0].is_long_path = to_tx[1].is_long_path = 0;
873 else if (si->current_ips_state == SRP_IPS_STATE_wrapped)
875 to_tx[0].request_type =
876 (si->rings[rx_ring ^ 0].waiting_to_restore
877 ? SRP_IPS_REQUEST_wait_to_restore
878 : SRP_IPS_REQUEST_signal_fail);
879 to_tx[1].request_type =
880 (si->rings[rx_ring ^ 1].waiting_to_restore
881 ? SRP_IPS_REQUEST_wait_to_restore
882 : SRP_IPS_REQUEST_signal_fail);
883 to_tx[0].status = to_tx[1].status = SRP_IPS_STATUS_wrapped;
884 to_tx[0].is_long_path = 0;
885 to_tx[1].is_long_path = 1;
888 tx_ips_packet (si, rx_ring ^ 0, &to_tx[0]);
889 tx_ips_packet (si, rx_ring ^ 1, &to_tx[1]);
893 srp_ips_process (vlib_main_t * vm,
894 vlib_node_runtime_t * rt,
897 srp_main_t * sm = &srp_main;
898 srp_interface_t * si;
902 pool_foreach (si, sm->interface_pool, ({
903 maybe_send_ips_message (si);
905 vlib_process_suspend (vm, 1.0);
911 vlib_node_registration_t srp_ips_process_node = {
912 .function = srp_ips_process,
913 .type = VLIB_NODE_TYPE_PROCESS,
914 .name = "srp-ips-process",
915 .state = VLIB_NODE_STATE_DISABLED,
918 static clib_error_t * srp_init (vlib_main_t * vm)
920 srp_main_t * sm = &srp_main;
922 sm->default_data_ttl = 255;
924 vlib_register_node (vm, &srp_ips_process_node);
925 vlib_register_node (vm, &srp_input_node);
926 vlib_register_node (vm, &srp_control_input_node);
927 srp_setup_node (vm, srp_input_node.index);
932 VLIB_INIT_FUNCTION (srp_init);