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+/*
+ * Copyright (c) 2021 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 a single path. Every time the strategy is reset with a command the
+ * forwarder starts to probe the available paths matching the probes on the
+ * original flow. if after the probing phase a better path exists (lower
+ * latency, less losses) the forwarder switch path, otherwise does nothing
+ */
+
+#ifndef HICNLIGHT_STRATEGY_BESTPATH_H
+#define HICNLIGHT_STRATEGY_BESTPATH_H
+
+#include "probe_generator.h"
+#include "local_prefixes.h"
+
+typedef enum {
+ PROBING_OFF,
+ PROBING_ON,
+ SENT_MAX_PROBES,
+ PROBING_ENDING, // waiting for probes to come back
+ UNKWNOWN,
+} probing_state_t;
+
+typedef struct {
+ // number or probes sent during a probing phase
+ unsigned int sent_probes;
+ // number or probes received during a probing phase
+ unsigned int recv_probes;
+ // sum of all rtt collected
+ Ticks rtt_sum;
+} strategy_bestpath_nexthop_state_t;
+
+typedef struct {
+ unsigned best_nexthop;
+ Ticks probing_time;
+ probing_state_t probing_state;
+ probe_generator_t *pg;
+} strategy_bestpath_state_t;
+
+typedef struct {
+ local_prefixes_t *local_prefixes;
+} strategy_bestpath_options_t;
+
+#endif /* HICNLIGHT_STRATEGY_BESTPATH_H */