--- /dev/null
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * node.c: srp packet processing
+ *
+ * Copyright (c) 2011 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/ip/ip_packet.h> /* for ip_csum_fold */
+#include <vnet/srp/srp.h>
+
+typedef struct {
+ u8 packet_data[32];
+} srp_input_trace_t;
+
+static u8 * format_srp_input_trace (u8 * s, va_list * va)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
+ srp_input_trace_t * t = va_arg (*va, srp_input_trace_t *);
+
+ s = format (s, "%U", format_srp_header, t->packet_data);
+
+ return s;
+}
+
+typedef enum {
+ SRP_INPUT_NEXT_ERROR,
+ SRP_INPUT_NEXT_ETHERNET_INPUT,
+ SRP_INPUT_NEXT_CONTROL,
+ SRP_INPUT_N_NEXT,
+} srp_input_next_t;
+
+typedef struct {
+ u8 next_index;
+ u8 buffer_advance;
+ u16 error;
+} srp_input_disposition_t;
+
+static srp_input_disposition_t srp_input_disposition_by_mode[8] = {
+ [SRP_MODE_reserved0] = {
+ .next_index = SRP_INPUT_NEXT_ERROR,
+ .error = SRP_ERROR_UNKNOWN_MODE,
+ },
+ [SRP_MODE_reserved1] = {
+ .next_index = SRP_INPUT_NEXT_ERROR,
+ .error = SRP_ERROR_UNKNOWN_MODE,
+ },
+ [SRP_MODE_reserved2] = {
+ .next_index = SRP_INPUT_NEXT_ERROR,
+ .error = SRP_ERROR_UNKNOWN_MODE,
+ },
+ [SRP_MODE_reserved3] = {
+ .next_index = SRP_INPUT_NEXT_ERROR,
+ .error = SRP_ERROR_UNKNOWN_MODE,
+ },
+ [SRP_MODE_keep_alive] = {
+ .next_index = SRP_INPUT_NEXT_ERROR,
+ .error = SRP_ERROR_KEEP_ALIVE_DROPPED,
+ },
+ [SRP_MODE_data] = {
+ .next_index = SRP_INPUT_NEXT_ETHERNET_INPUT,
+ .buffer_advance = sizeof (srp_header_t),
+ },
+ [SRP_MODE_control_pass_to_host] = {
+ .next_index = SRP_INPUT_NEXT_CONTROL,
+ },
+ [SRP_MODE_control_locally_buffered_for_host] = {
+ .next_index = SRP_INPUT_NEXT_CONTROL,
+ },
+};
+
+static uword
+srp_input (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ vnet_main_t * vnm = vnet_get_main();
+ srp_main_t * sm = &srp_main;
+ u32 n_left_from, next_index, * from, * to_next;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ vlib_trace_frame_buffers_only (vm, node,
+ from,
+ n_left_from,
+ sizeof (from[0]),
+ sizeof (srp_input_trace_t));
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1, sw_if_index0, sw_if_index1;
+ vlib_buffer_t * b0, * b1;
+ u8 next0, next1, error0, error1;
+ srp_header_t * s0, * s1;
+ srp_input_disposition_t * d0, * d1;
+ vnet_hw_interface_t * hi0, * hi1;
+ srp_interface_t * si0, * si1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * b2, * b3;
+
+ b2 = vlib_get_buffer (vm, from[2]);
+ b3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (b2, LOAD);
+ vlib_prefetch_buffer_header (b3, LOAD);
+
+ CLIB_PREFETCH (b2->data, sizeof (srp_header_t), LOAD);
+ CLIB_PREFETCH (b3->data, sizeof (srp_header_t), LOAD);
+ }
+
+ bi0 = from[0];
+ bi1 = from[1];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ s0 = (void *) (b0->data + b0->current_data);
+ s1 = (void *) (b1->data + b1->current_data);
+
+ /* Data packets are always assigned to side A (outer ring) interface. */
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+ hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ hi1 = vnet_get_sup_hw_interface (vnm, sw_if_index1);
+
+ si0 = pool_elt_at_index (sm->interface_pool, hi0->hw_instance);
+ si1 = pool_elt_at_index (sm->interface_pool, hi1->hw_instance);
+
+ sw_if_index0 = (s0->mode == SRP_MODE_data
+ ? si0->rings[SRP_RING_OUTER].sw_if_index
+ : sw_if_index0);
+ sw_if_index1 = (s1->mode == SRP_MODE_data
+ ? si1->rings[SRP_RING_OUTER].sw_if_index
+ : sw_if_index1);
+
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0;
+ vnet_buffer (b1)->sw_if_index[VLIB_RX] = sw_if_index1;
+
+ d0 = srp_input_disposition_by_mode + s0->mode;
+ d1 = srp_input_disposition_by_mode + s1->mode;
+
+ next0 = d0->next_index;
+ next1 = d1->next_index;
+
+ error0 = d0->error;
+ error1 = d1->error;
+
+ vlib_buffer_advance (b0, d0->buffer_advance);
+ vlib_buffer_advance (b1, d1->buffer_advance);
+
+ b0->error = node->errors[error0];
+ b1->error = node->errors[error1];
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, sw_if_index0;
+ vlib_buffer_t * b0;
+ u8 next0, error0;
+ srp_header_t * s0;
+ srp_input_disposition_t * d0;
+ srp_interface_t * si0;
+ vnet_hw_interface_t * hi0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+ n_left_from -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ s0 = (void *) (b0->data + b0->current_data);
+
+ /* Data packets are always assigned to side A (outer ring) interface. */
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+
+ si0 = pool_elt_at_index (sm->interface_pool, hi0->hw_instance);
+
+ sw_if_index0 = (s0->mode == SRP_MODE_data
+ ? si0->rings[SRP_RING_OUTER].sw_if_index
+ : sw_if_index0);
+
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0;
+
+ d0 = srp_input_disposition_by_mode + s0->mode;
+
+ next0 = d0->next_index;
+
+ error0 = d0->error;
+
+ vlib_buffer_advance (b0, d0->buffer_advance);
+
+ b0->error = node->errors[error0];
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return from_frame->n_vectors;
+}
+
+static char * srp_error_strings[] = {
+#define _(f,s) s,
+ foreach_srp_error
+#undef _
+};
+
+static vlib_node_registration_t srp_input_node = {
+ .function = srp_input,
+ .name = "srp-input",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+
+ .n_errors = SRP_N_ERROR,
+ .error_strings = srp_error_strings,
+
+ .n_next_nodes = SRP_INPUT_N_NEXT,
+ .next_nodes = {
+ [SRP_INPUT_NEXT_ERROR] = "error-drop",
+ [SRP_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",
+ [SRP_INPUT_NEXT_CONTROL] = "srp-control",
+ },
+
+ .format_buffer = format_srp_header_with_length,
+ .format_trace = format_srp_input_trace,
+ .unformat_buffer = unformat_srp_header,
+};
+
+static uword
+srp_topology_packet (vlib_main_t * vm, u32 sw_if_index, u8 ** contents)
+{
+ vnet_main_t * vnm = vnet_get_main();
+ vnet_hw_interface_t * hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
+ srp_topology_header_t * t;
+ srp_topology_mac_binding_t * mb;
+ u32 nb, nmb;
+
+ t = (void *) *contents;
+
+ nb = clib_net_to_host_u16 (t->n_bytes_of_data_that_follows);
+ nmb = (nb - sizeof (t->originator_address)) / sizeof (mb[0]);
+ if (vec_len (*contents) < sizeof (t[0]) + nmb * sizeof (mb[0]))
+ return SRP_ERROR_TOPOLOGY_BAD_LENGTH;
+
+ /* Fill in our source MAC address. */
+ clib_memcpy (t->ethernet.src_address, hi->hw_address, vec_len (hi->hw_address));
+
+ /* Make space for our MAC binding. */
+ vec_resize (*contents, sizeof (srp_topology_mac_binding_t));
+ t = (void *) *contents;
+ t->n_bytes_of_data_that_follows = clib_host_to_net_u16 (nb + sizeof (mb[0]));
+
+ mb = t->bindings + nmb;
+
+ mb->flags =
+ ((t->srp.is_inner_ring ? SRP_TOPOLOGY_MAC_BINDING_FLAG_IS_INNER_RING : 0)
+ | (/* is wrapped FIXME */ 0));
+ clib_memcpy (mb->address, hi->hw_address, vec_len (hi->hw_address));
+
+ t->control.checksum
+ = ~ip_csum_fold (ip_incremental_checksum (0, &t->control,
+ vec_len (*contents) - STRUCT_OFFSET_OF (srp_generic_control_header_t, control)));
+
+ {
+ vlib_frame_t * f = vlib_get_frame_to_node (vm, hi->output_node_index);
+ vlib_buffer_t * b;
+ u32 * to_next = vlib_frame_vector_args (f);
+ u32 bi;
+
+ bi = vlib_buffer_add_data (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
+ /* buffer to append to */ 0,
+ *contents, vec_len (*contents));
+ b = vlib_get_buffer (vm, bi);
+ vnet_buffer (b)->sw_if_index[VLIB_RX] = vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
+ to_next[0] = bi;
+ f->n_vectors = 1;
+ vlib_put_frame_to_node (vm, hi->output_node_index, f);
+ }
+
+ return SRP_ERROR_CONTROL_PACKETS_PROCESSED;
+}
+
+typedef uword (srp_control_handler_function_t) (vlib_main_t * vm,
+ u32 sw_if_index,
+ u8 ** contents);
+
+static uword
+srp_control_input (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ u32 n_left_from, next_index, * from, * to_next;
+ vlib_node_runtime_t * error_node;
+ static u8 * contents;
+
+ error_node = vlib_node_get_runtime (vm, srp_input_node.index);
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ vlib_trace_frame_buffers_only (vm, node,
+ from,
+ n_left_from,
+ sizeof (from[0]),
+ sizeof (srp_input_trace_t));
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, l2_len0, l3_len0;
+ vlib_buffer_t * b0;
+ u8 next0, error0;
+ srp_generic_control_header_t * s0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+ n_left_from -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ s0 = (void *) (b0->data + b0->current_data);
+ l2_len0 = vlib_buffer_length_in_chain (vm, b0);
+ l3_len0 = l2_len0 - STRUCT_OFFSET_OF (srp_generic_control_header_t, control);
+
+ error0 = SRP_ERROR_CONTROL_PACKETS_PROCESSED;
+
+ error0 = s0->control.version != 0 ? SRP_ERROR_CONTROL_VERSION_NON_ZERO : error0;
+
+ {
+ u16 save0 = s0->control.checksum;
+ u16 computed0;
+ s0->control.checksum = 0;
+ computed0 = ~ip_csum_fold (ip_incremental_checksum (0, &s0->control, l3_len0));
+ error0 = save0 != computed0 ? SRP_ERROR_CONTROL_BAD_CHECKSUM : error0;
+ }
+
+ if (error0 == SRP_ERROR_CONTROL_PACKETS_PROCESSED)
+ {
+ static srp_control_handler_function_t * t[SRP_N_CONTROL_PACKET_TYPE] = {
+ [SRP_CONTROL_PACKET_TYPE_topology] = srp_topology_packet,
+ };
+ srp_control_handler_function_t * f;
+
+ f = 0;
+ if (s0->control.type < ARRAY_LEN (t))
+ f = t[s0->control.type];
+
+ if (f)
+ {
+ vec_validate (contents, l2_len0 - 1);
+ vlib_buffer_contents (vm, bi0, contents);
+ error0 = f (vm, vnet_buffer (b0)->sw_if_index[VLIB_RX], &contents);
+ }
+ else
+ error0 = SRP_ERROR_UNKNOWN_CONTROL;
+ }
+
+ b0->error = error_node->errors[error0];
+ next0 = 0;
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return from_frame->n_vectors;
+}
+
+static vlib_node_registration_t srp_control_input_node = {
+ .function = srp_control_input,
+ .name = "srp-control",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+
+ .format_buffer = format_srp_header_with_length,
+ .format_trace = format_srp_input_trace,
+ .unformat_buffer = unformat_srp_header,
+};
+
+static u8 * format_srp_ips_request_type (u8 * s, va_list * args)
+{
+ u32 x = va_arg (*args, u32);
+ char * t = 0;
+ switch (x)
+ {
+#define _(f,n) case SRP_IPS_REQUEST_##f: t = #f; break;
+ foreach_srp_ips_request_type
+#undef _
+ default:
+ return format (s, "unknown 0x%x", x);
+ }
+ return format (s, "%U", format_c_identifier, t);
+}
+
+static u8 * format_srp_ips_status (u8 * s, va_list * args)
+{
+ u32 x = va_arg (*args, u32);
+ char * t = 0;
+ switch (x)
+ {
+#define _(f,n) case SRP_IPS_STATUS_##f: t = #f; break;
+ foreach_srp_ips_status
+#undef _
+ default:
+ return format (s, "unknown 0x%x", x);
+ }
+ return format (s, "%U", format_c_identifier, t);
+}
+
+static u8 * format_srp_ips_state (u8 * s, va_list * args)
+{
+ u32 x = va_arg (*args, u32);
+ char * t = 0;
+ switch (x)
+ {
+#define _(f) case SRP_IPS_STATE_##f: t = #f; break;
+ foreach_srp_ips_state
+#undef _
+ default:
+ return format (s, "unknown 0x%x", x);
+ }
+ return format (s, "%U", format_c_identifier, t);
+}
+
+static u8 * format_srp_ring (u8 * s, va_list * args)
+{
+ u32 ring = va_arg (*args, u32);
+ return format (s, "%s", ring == SRP_RING_INNER ? "inner" : "outer");
+}
+
+static u8 * format_srp_ips_header (u8 * s, va_list * args)
+{
+ srp_ips_header_t * h = va_arg (*args, srp_ips_header_t *);
+
+ s = format (s, "%U, %U, %U, %s-path",
+ format_srp_ips_request_type, h->request_type,
+ format_ethernet_address, h->originator_address,
+ format_srp_ips_status, h->status,
+ h->is_long_path ? "long" : "short");
+
+ return s;
+}
+
+static u8 * format_srp_interface (u8 * s, va_list * args)
+{
+ srp_interface_t * si = va_arg (*args, srp_interface_t *);
+ srp_interface_ring_t * ir;
+
+ s = format (s, "address %U, IPS state %U",
+ format_ethernet_address, si->my_address,
+ format_srp_ips_state, si->current_ips_state);
+ for (ir = si->rings; ir < si->rings + SRP_N_RING; ir++)
+ if (ir->rx_neighbor_address_valid)
+ s = format (s, ", %U neighbor %U",
+ format_srp_ring, ir->ring,
+ format_ethernet_address, ir->rx_neighbor_address);
+
+ return s;
+}
+
+u8 * format_srp_device (u8 * s, va_list * args)
+{
+ u32 hw_if_index = va_arg (*args, u32);
+ CLIB_UNUSED (int verbose) = va_arg (*args, int);
+ vnet_main_t * vnm = vnet_get_main();
+ srp_main_t * sm = &srp_main;
+ vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, hw_if_index);
+ srp_interface_t * si = pool_elt_at_index (sm->interface_pool, hi->hw_instance);
+ return format (s, "%U", format_srp_interface, si);
+}
+
+always_inline srp_interface_t *
+srp_get_interface (u32 sw_if_index, srp_ring_type_t * ring)
+{
+ vnet_main_t * vnm = vnet_get_main();
+ srp_main_t * sm = &srp_main;
+ vnet_hw_interface_t * hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
+ srp_interface_t * si;
+
+ ASSERT (hi->hw_class_index == srp_hw_interface_class.index);
+ si = pool_elt_at_index (sm->interface_pool, hi->hw_instance);
+
+ ASSERT (si->rings[SRP_RING_INNER].hw_if_index == hi->hw_if_index
+ || si->rings[SRP_RING_OUTER].hw_if_index == hi->hw_if_index);
+ if (ring)
+ *ring =
+ (hi->hw_if_index == si->rings[SRP_RING_INNER].hw_if_index
+ ? SRP_RING_INNER
+ : SRP_RING_OUTER);
+
+ return si;
+}
+
+static void init_ips_packet (srp_interface_t * si,
+ srp_ring_type_t tx_ring,
+ srp_ips_header_t * i)
+{
+ memset (i, 0, sizeof (i[0]));
+
+ i->srp.ttl = 1;
+ i->srp.is_inner_ring = tx_ring;
+ i->srp.priority = 7;
+ i->srp.mode = SRP_MODE_control_locally_buffered_for_host;
+ srp_header_compute_parity (&i->srp);
+
+ clib_memcpy (&i->ethernet.src_address, &si->my_address, sizeof (si->my_address));
+ i->ethernet.type = clib_host_to_net_u16 (ETHERNET_TYPE_SRP_CONTROL);
+
+ /* Checksum will be filled in later. */
+ i->control.version = 0;
+ i->control.type = SRP_CONTROL_PACKET_TYPE_ips;
+ i->control.ttl = 255;
+
+ clib_memcpy (&i->originator_address, &si->my_address, sizeof (si->my_address));
+}
+
+static void tx_ips_packet (srp_interface_t * si,
+ srp_ring_type_t tx_ring,
+ srp_ips_header_t * i)
+{
+ srp_main_t * sm = &srp_main;
+ vnet_main_t * vnm = vnet_get_main();
+ vlib_main_t * vm = sm->vlib_main;
+ vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, si->rings[tx_ring].hw_if_index);
+ vlib_frame_t * f;
+ vlib_buffer_t * b;
+ u32 * to_next, bi;
+
+ if (! vnet_sw_interface_is_admin_up (vnm, hi->sw_if_index))
+ return;
+ if (hi->hw_class_index != srp_hw_interface_class.index)
+ return;
+
+ i->control.checksum
+ = ~ip_csum_fold (ip_incremental_checksum (0, &i->control,
+ sizeof (i[0]) - STRUCT_OFFSET_OF (srp_ips_header_t, control)));
+
+ bi = vlib_buffer_add_data (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
+ /* buffer to append to */ 0,
+ i, sizeof (i[0]));
+
+ /* FIXME trace. */
+ if (0)
+ clib_warning ("%U %U",
+ format_vnet_sw_if_index_name, vnm, hi->sw_if_index,
+ format_srp_ips_header, i);
+
+ b = vlib_get_buffer (vm, bi);
+ vnet_buffer (b)->sw_if_index[VLIB_RX] = vnet_buffer (b)->sw_if_index[VLIB_TX] = hi->sw_if_index;
+
+ f = vlib_get_frame_to_node (vm, hi->output_node_index);
+ to_next = vlib_frame_vector_args (f);
+ to_next[0] = bi;
+ f->n_vectors = 1;
+ vlib_put_frame_to_node (vm, hi->output_node_index, f);
+}
+
+static void serialize_srp_interface_state_msg (serialize_main_t * m, va_list * va)
+{
+ srp_interface_t * si = va_arg (*va, srp_interface_t *);
+ srp_main_t * sm = &srp_main;
+ int r;
+
+ ASSERT (! pool_is_free (sm->interface_pool, si));
+ serialize_integer (m, si - sm->interface_pool, sizeof (u32));
+ serialize_likely_small_unsigned_integer (m, si->current_ips_state);
+ for (r = 0; r < SRP_N_RING; r++)
+ {
+ srp_interface_ring_t * ir = &si->rings[r];
+ void * p;
+ serialize_likely_small_unsigned_integer (m, ir->rx_neighbor_address_valid);
+ if (ir->rx_neighbor_address_valid)
+ {
+ p = serialize_get (m, sizeof (ir->rx_neighbor_address));
+ clib_memcpy (p, ir->rx_neighbor_address, sizeof (ir->rx_neighbor_address));
+ }
+ serialize_likely_small_unsigned_integer (m, ir->waiting_to_restore);
+ if (ir->waiting_to_restore)
+ serialize (m, serialize_f64, ir->wait_to_restore_start_time);
+ }
+}
+
+static void unserialize_srp_interface_state_msg (serialize_main_t * m, va_list * va)
+{
+ CLIB_UNUSED (mc_main_t * mcm) = va_arg (*va, mc_main_t *);
+ srp_main_t * sm = &srp_main;
+ srp_interface_t * si;
+ u32 si_index, r;
+
+ unserialize_integer (m, &si_index, sizeof (u32));
+ si = pool_elt_at_index (sm->interface_pool, si_index);
+ si->current_ips_state = unserialize_likely_small_unsigned_integer (m);
+ for (r = 0; r < SRP_N_RING; r++)
+ {
+ srp_interface_ring_t * ir = &si->rings[r];
+ void * p;
+ ir->rx_neighbor_address_valid = unserialize_likely_small_unsigned_integer (m);
+ if (ir->rx_neighbor_address_valid)
+ {
+ p = unserialize_get (m, sizeof (ir->rx_neighbor_address));
+ clib_memcpy (ir->rx_neighbor_address, p, sizeof (ir->rx_neighbor_address));
+ }
+ ir->waiting_to_restore = unserialize_likely_small_unsigned_integer (m);
+ if (ir->waiting_to_restore)
+ unserialize (m, unserialize_f64, &ir->wait_to_restore_start_time);
+ }
+}
+
+MC_SERIALIZE_MSG (srp_interface_state_msg, static) = {
+ .name = "vnet_srp_interface_state",
+ .serialize = serialize_srp_interface_state_msg,
+ .unserialize = unserialize_srp_interface_state_msg,
+};
+
+static int requests_switch (srp_ips_request_type_t r)
+{
+ static u8 t[16] = {
+ [SRP_IPS_REQUEST_forced_switch] = 1,
+ [SRP_IPS_REQUEST_manual_switch] = 1,
+ [SRP_IPS_REQUEST_signal_fail] = 1,
+ [SRP_IPS_REQUEST_signal_degrade] = 1,
+ };
+ return (int) r < ARRAY_LEN (t) ? t[r] : 0;
+}
+
+/* Called when an IPS control packet is received on given interface. */
+void srp_ips_rx_packet (u32 sw_if_index, srp_ips_header_t * h)
+{
+ vnet_main_t * vnm = vnet_get_main();
+ vlib_main_t * vm = srp_main.vlib_main;
+ srp_ring_type_t rx_ring;
+ srp_interface_t * si = srp_get_interface (sw_if_index, &rx_ring);
+ srp_interface_ring_t * ir = &si->rings[rx_ring];
+ int si_needs_broadcast = 0;
+
+ /* FIXME trace. */
+ if (0)
+ clib_warning ("%U %U %U",
+ format_time_interval, "h:m:s:u", vlib_time_now (vm),
+ format_vnet_sw_if_index_name, vnm, sw_if_index,
+ format_srp_ips_header, h);
+
+ /* Ignore self-generated IPS packets. */
+ if (! memcmp (h->originator_address, si->my_address, sizeof (h->originator_address)))
+ goto done;
+
+ /* Learn neighbor address from short path messages. */
+ if (! h->is_long_path)
+ {
+ if (ir->rx_neighbor_address_valid
+ && memcmp (ir->rx_neighbor_address, h->originator_address, sizeof (ir->rx_neighbor_address)))
+ {
+ ASSERT (0);
+ }
+ ir->rx_neighbor_address_valid = 1;
+ clib_memcpy (ir->rx_neighbor_address, h->originator_address, sizeof (ir->rx_neighbor_address));
+ }
+
+ switch (si->current_ips_state)
+ {
+ case SRP_IPS_STATE_idle:
+ /* Received {REQ,NEIGHBOR,W,S} in idle state: wrap. */
+ if (requests_switch (h->request_type)
+ && ! h->is_long_path
+ && h->status == SRP_IPS_STATUS_wrapped)
+ {
+ srp_ips_header_t to_tx[2];
+
+ si_needs_broadcast = 1;
+ si->current_ips_state = SRP_IPS_STATE_wrapped;
+ si->hw_wrap_function (si->rings[SRP_SIDE_A].hw_if_index, /* enable_wrap */ 1);
+ si->hw_wrap_function (si->rings[SRP_SIDE_B].hw_if_index, /* enable_wrap */ 1);
+
+ init_ips_packet (si, rx_ring ^ 0, &to_tx[0]);
+ to_tx[0].request_type = SRP_IPS_REQUEST_idle;
+ to_tx[0].status = SRP_IPS_STATUS_wrapped;
+ to_tx[0].is_long_path = 0;
+ tx_ips_packet (si, rx_ring ^ 0, &to_tx[0]);
+
+ init_ips_packet (si, rx_ring ^ 1, &to_tx[1]);
+ to_tx[1].request_type = h->request_type;
+ to_tx[1].status = SRP_IPS_STATUS_wrapped;
+ to_tx[1].is_long_path = 1;
+ tx_ips_packet (si, rx_ring ^ 1, &to_tx[1]);
+ }
+ break;
+
+ case SRP_IPS_STATE_wrapped:
+ if (! h->is_long_path
+ && h->request_type == SRP_IPS_REQUEST_idle
+ && h->status == SRP_IPS_STATUS_idle)
+ {
+ si_needs_broadcast = 1;
+ si->current_ips_state = SRP_IPS_STATE_idle;
+ si->hw_wrap_function (si->rings[SRP_SIDE_A].hw_if_index, /* enable_wrap */ 0);
+ si->hw_wrap_function (si->rings[SRP_SIDE_B].hw_if_index, /* enable_wrap */ 0);
+ }
+ break;
+
+ case SRP_IPS_STATE_pass_thru:
+ /* FIXME */
+ break;
+
+ default:
+ abort ();
+ break;
+ }
+
+ done:
+ if (vm->mc_main && si_needs_broadcast)
+ mc_serialize (vm->mc_main, &srp_interface_state_msg, si);
+}
+
+/* Preform local IPS request on given interface. */
+void srp_ips_local_request (u32 sw_if_index, srp_ips_request_type_t request)
+{
+ vnet_main_t * vnm = vnet_get_main();
+ srp_main_t * sm = &srp_main;
+ vlib_main_t * vm = sm->vlib_main;
+ srp_ring_type_t rx_ring;
+ srp_interface_t * si = srp_get_interface (sw_if_index, &rx_ring);
+ srp_interface_ring_t * ir = &si->rings[rx_ring];
+ int si_needs_broadcast = 0;
+
+ if (request == SRP_IPS_REQUEST_wait_to_restore)
+ {
+ if (si->current_ips_state != SRP_IPS_STATE_wrapped)
+ return;
+ if (! ir->waiting_to_restore)
+ {
+ ir->wait_to_restore_start_time = vlib_time_now (sm->vlib_main);
+ ir->waiting_to_restore = 1;
+ si_needs_broadcast = 1;
+ }
+ }
+ else
+ {
+ /* FIXME handle local signal fail. */
+ si_needs_broadcast = ir->waiting_to_restore;
+ ir->wait_to_restore_start_time = 0;
+ ir->waiting_to_restore = 0;
+ }
+
+ /* FIXME trace. */
+ if (0)
+ clib_warning ("%U %U",
+ format_vnet_sw_if_index_name, vnm, sw_if_index,
+ format_srp_ips_request_type, request);
+
+ if (vm->mc_main && si_needs_broadcast)
+ mc_serialize (vm->mc_main, &srp_interface_state_msg, si);
+}
+
+static void maybe_send_ips_message (srp_interface_t * si)
+{
+ srp_main_t * sm = &srp_main;
+ srp_ips_header_t to_tx[2];
+ srp_ring_type_t rx_ring = SRP_RING_OUTER;
+ srp_interface_ring_t * r0 = &si->rings[rx_ring ^ 0];
+ srp_interface_ring_t * r1 = &si->rings[rx_ring ^ 1];
+ f64 now = vlib_time_now (sm->vlib_main);
+
+ if (! si->ips_process_enable)
+ return;
+
+ if (si->current_ips_state == SRP_IPS_STATE_wrapped
+ && r0->waiting_to_restore
+ && r1->waiting_to_restore
+ && now >= r0->wait_to_restore_start_time + si->config.wait_to_restore_idle_delay
+ && now >= r1->wait_to_restore_start_time + si->config.wait_to_restore_idle_delay)
+ {
+ si->current_ips_state = SRP_IPS_STATE_idle;
+ r0->waiting_to_restore = r1->waiting_to_restore = 0;
+ r0->wait_to_restore_start_time = r1->wait_to_restore_start_time = 0;
+ }
+
+ if (si->current_ips_state != SRP_IPS_STATE_idle)
+ return;
+
+ init_ips_packet (si, rx_ring ^ 0, &to_tx[0]);
+ init_ips_packet (si, rx_ring ^ 1, &to_tx[1]);
+
+ if (si->current_ips_state == SRP_IPS_STATE_idle)
+ {
+ to_tx[0].request_type = to_tx[1].request_type = SRP_IPS_REQUEST_idle;
+ to_tx[0].status = to_tx[1].status = SRP_IPS_STATUS_idle;
+ to_tx[0].is_long_path = to_tx[1].is_long_path = 0;
+ }
+
+ else if (si->current_ips_state == SRP_IPS_STATE_wrapped)
+ {
+ to_tx[0].request_type =
+ (si->rings[rx_ring ^ 0].waiting_to_restore
+ ? SRP_IPS_REQUEST_wait_to_restore
+ : SRP_IPS_REQUEST_signal_fail);
+ to_tx[1].request_type =
+ (si->rings[rx_ring ^ 1].waiting_to_restore
+ ? SRP_IPS_REQUEST_wait_to_restore
+ : SRP_IPS_REQUEST_signal_fail);
+ to_tx[0].status = to_tx[1].status = SRP_IPS_STATUS_wrapped;
+ to_tx[0].is_long_path = 0;
+ to_tx[1].is_long_path = 1;
+ }
+
+ tx_ips_packet (si, rx_ring ^ 0, &to_tx[0]);
+ tx_ips_packet (si, rx_ring ^ 1, &to_tx[1]);
+}
+
+static uword
+srp_ips_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt,
+ vlib_frame_t * f)
+{
+ srp_main_t * sm = &srp_main;
+ srp_interface_t * si;
+
+ while (1)
+ {
+ pool_foreach (si, sm->interface_pool, ({
+ maybe_send_ips_message (si);
+ }));
+ vlib_process_suspend (vm, 1.0);
+ }
+
+ return 0;
+}
+
+vlib_node_registration_t srp_ips_process_node = {
+ .function = srp_ips_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "srp-ips-process",
+ .state = VLIB_NODE_STATE_DISABLED,
+};
+
+static clib_error_t * srp_init (vlib_main_t * vm)
+{
+ srp_main_t * sm = &srp_main;
+
+ sm->default_data_ttl = 255;
+ sm->vlib_main = vm;
+ vlib_register_node (vm, &srp_ips_process_node);
+ vlib_register_node (vm, &srp_input_node);
+ vlib_register_node (vm, &srp_control_input_node);
+ srp_setup_node (vm, srp_input_node.index);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (srp_init);
Code Review / vpp.git / blobdiff