From 15ad172a847fa667c57a4594ef4158405db9a984 Mon Sep 17 00:00:00 2001
From: Angelo Mantellini <angelo.mantellini@cisco.com>
Date: Tue, 31 Mar 2020 17:50:43 +0200
Subject: [HICN-554] hicn-light refactoring
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Change-Id: I36f2d393741d4502ce14d3791158e43e3e9cd4cf
Signed-off-by: Jordan Augé <jordan.auge+fdio@cisco.com>
---
 hicn-light/src/hicn/strategies/low_latency.h | 98 ++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 hicn-light/src/hicn/strategies/low_latency.h

(limited to 'hicn-light/src/hicn/strategies/low_latency.h')

diff --git a/hicn-light/src/hicn/strategies/low_latency.h b/hicn-light/src/hicn/strategies/low_latency.h
new file mode 100644
index 000000000..4745c4c47
--- /dev/null
+++ b/hicn-light/src/hicn/strategies/low_latency.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2017-2019 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.
+ */
+
+/**
+ * Forward on the path with lowest latency
+ */
+
+#ifndef HICNLIGHT_STRATEGY_LOW_LATENCY_H
+#define HICNLIGHT_STRATEGY_LOW_LATENCY_H
+
+#define MAX_FWD_STRATEGY_RELATED_PREFIXES 10
+
+typedef struct {
+} strategy_low_latency_nexthop_state_t;
+
+typedef struct {
+} strategy_low_latency_state_t;
+
+typedef struct {
+  //Name ** related_prefixes;
+  Name *related_prefixes[MAX_FWD_STRATEGY_RELATED_PREFIXES];
+  unsigned related_prefixes_len;
+} strategy_low_latency_options_t;
+
+#if 0
+
+/*
+ * We have global state in addition to state associated for each next hop :
+ */
+typedef struct {
+  bool in_use;
+  bool is_allowed; // XXX TODO the policy may not allow the use of this face
+//  unsigned face_id;
+  unsigned sent_packets;
+  /* switch metrics */
+  unsigned last_try_to_switch_round;
+  unsigned try_to_switch_counter;
+  /* probes counters */
+  unsigned recevied_probes;
+  unsigned rounds_without_probes;
+  unsigned sent_probes;
+  unsigned lost_probes;
+  unsigned non_lossy_rounds;
+  /* Averages */
+  double avg_rtt;
+  double avg_rtt_in_use;
+  double avg_queue;
+  double avg_loss_rate;
+} strategy_low_latency_nexthop_state_t;
+
+typedef struct {
+  // hash map from connectionId to StrategyNexthopStateLL
+  //PARCHashMap *strategy_state;
+  // XXX This is now store in each nexthop state
+
+  /*
+   * Hhash map from sequence number to ticks (sent time)
+   *
+   * TODO improvement: the tick and face id could be stored in the probe and
+   * repeated in the reply to avoid state to be maintained.
+   *
+   * Also, in case we have few probes, linear scan might be more effective
+   */
+  PARCHashMap *pending_probes_ticks;
+
+  /* hash map from sequence number to face id */
+  PARCHashMap *pending_probes_faces;
+
+  const Forwarder * forwarder;
+  PARCEventTimer *sendProbes;
+  PARCEventTimer *computeBestFace;
+  uint8_t * probe;
+  hicn_name_t * name;
+  StrategyNexthopStateLL * bestFaces[2];
+  unsigned round;
+  unsigned rounds_in_multipath;
+  unsigned rounds_with_error;
+  unsigned rounds_avoiding_multipath;
+  bool use2paths;
+  bool avoid_multipath;
+} strategy_low_latency_state_t;
+
+#endif
+
+
+#endif /* HICNLIGHT_STRATEGY_LOW_LATENCY_H */
-- 
cgit 1.2.3-korg