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-rw-r--r--hicn-plugin/src/mapme_ack_node.c234
1 files changed, 234 insertions, 0 deletions
diff --git a/hicn-plugin/src/mapme_ack_node.c b/hicn-plugin/src/mapme_ack_node.c
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+++ b/hicn-plugin/src/mapme_ack_node.c
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+/*
+ * Copyright (c) 2017-2020 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.
+ */
+
+#include <vnet/ip/ip6_packet.h>
+
+#include "hicn.h"
+#include "mapme.h"
+#include "mapme_ack.h"
+#include "mapme_eventmgr.h"
+#include "mgmt.h"
+#include "parser.h"
+#include "data_fwd.h"
+#include "infra.h"
+#include "strategy_dpo_manager.h"
+#include "error.h"
+#include "state.h"
+
+extern hicn_mapme_main_t mapme_main;
+
+/* packet trace format function */
+static u8 *hicn_mapme_ack_format_trace (u8 * s, va_list * args);
+
+
+/* Stats string values */
+static char *hicn_mapme_ack_error_strings[] = {
+#define _(sym, string) string,
+ foreach_hicnfwd_error
+#undef _
+};
+
+/*
+ * @brief Process incoming ack messages (Interest Update Ack)
+ * @param vm vlib main data structure
+ * @param b Control packet (IU)
+ * @param face_id Ingress face id
+ */
+bool
+hicn_mapme_process_ack (vlib_main_t * vm, vlib_buffer_t * b,
+ hicn_face_id_t in_face)
+{
+ seq_t fib_seq;
+ const dpo_id_t *dpo;
+ hicn_prefix_t prefix;
+ mapme_params_t params;
+ int rc;
+
+ /* Parse incoming message */
+ rc =
+ hicn_mapme_parse_packet (vlib_buffer_get_current (b), &prefix, &params);
+ if (rc < 0)
+ goto ERR_PARSE;
+
+ /* if (params.seq == INVALID_SEQ) */
+ /* { */
+ /* DEBUG ("Invalid sequence number found in IU"); */
+ /* return true; */
+ /* } */
+
+ dpo = fib_epm_lookup (&(prefix.name), prefix.len);
+ if (!dpo)
+ {
+ DEBUG ("Ignored ACK for non-existing FIB entry. Ignored.");
+ return true;
+
+ }
+
+ /* We are only expecting ACKs for hICN DPOs */
+ ASSERT (dpo_is_hicn (dpo));
+
+ hicn_mapme_tfib_t *tfib =
+ TFIB (hicn_strategy_dpo_ctx_get (dpo->dpoi_index));
+
+ if (tfib == NULL)
+ {
+ WARN ("Unable to get strategy ctx.");
+ return false;
+ }
+
+ fib_seq = tfib->seq;
+
+ /*
+ * As we always retransmit IU with the latest seq, we are not interested in
+ * ACKs with inferior seq
+ */
+ if (params.seq < fib_seq)
+ {
+ DEBUG ("Ignored ACK for low seq");
+ return true;
+ }
+
+ hicn_mapme_tfib_del (tfib, in_face);
+
+ /*
+ * Is the ingress face in TFIB ? if so, remove it, otherwise it might be a
+ * duplicate
+ */
+ retx_t *retx = vlib_process_signal_event_data (vm,
+ hicn_mapme_eventmgr_process_node.
+ index,
+ HICN_MAPME_EVENT_FACE_PH_DEL,
+ 1,
+ sizeof (retx_t));
+ *retx = (retx_t)
+ {
+ .prefix = prefix,
+ .dpo = *dpo
+ };
+
+ return true;
+
+ERR_PARSE:
+ return false;
+}
+
+vlib_node_registration_t hicn_mapme_ack_node;
+
+static uword
+hicn_mapme_ack_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ hicn_buffer_t *hb;
+ hicn_mapme_ack_next_t next_index;
+ u32 n_left_from, *from, *to_next;
+ n_left_from = frame->n_vectors;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0) // buffers in the current frame
+ {
+ 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;
+ vlib_buffer_t *b0;
+ u32 next0 = HICN_MAPME_ACK_NEXT_ERROR_DROP;
+ u32 sw_if_index0;
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+ b0 = vlib_get_buffer (vm, bi0);
+
+ vlib_cli_output (vm, "Received IUAck");
+ hb = hicn_get_buffer (b0);
+ hicn_mapme_process_ack (vm, b0, hb->face_id);
+
+ /* Single loop: process 1 packet here */
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ hicn_mapme_ack_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+ /* $$$$$ Done processing 1 packet here $$$$$ */
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ 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);
+ }
+// vlib_node_increment_counter (vm, hicn_mapme_ack_node.index,
+// HICN_MAPME_ACK_ERROR_SWAPPED, pkts_swapped);
+ return (frame->n_vectors);
+}
+
+/* packet trace format function */
+static u8 *
+hicn_mapme_ack_format_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ hicn_mapme_ack_trace_t *t = va_arg (*args, hicn_mapme_ack_trace_t *);
+
+ s = format (s, "MAPME_ACK: pkt: %d, sw_if_index %d, next index %d",
+ (int) t->pkt_type, t->sw_if_index, t->next_index);
+ return (s);
+}
+
+
+/*
+ * Node registration for the MAP-Me node processing special interests
+ */
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (hicn_mapme_ack_node) =
+{
+ .function = hicn_mapme_ack_node_fn,
+ .name = "hicn-mapme-ack",
+ .vector_size = sizeof (u32),
+ .runtime_data_bytes = sizeof (hicn_mapme_ack_runtime_t),
+ .format_trace = hicn_mapme_ack_format_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (hicn_mapme_ack_error_strings),
+ .error_strings = hicn_mapme_ack_error_strings,
+ .n_next_nodes = HICN_MAPME_ACK_N_NEXT,
+ .next_nodes =
+ {
+ [HICN_MAPME_ACK_NEXT_ERROR_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */