This is the first commit of the hicn projectv19.01

Change-Id: I6f2544ad9b9f8891c88cc4bcce3cf19bd3cc863f
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>

1 files changed, 164 insertions, 0 deletions

diff --git a/hicn-light/src/processor/pitEntry.h b/hicn-light/src/processor/pitEntry.h
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+/*
+ * 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.
+ */
+
+/**
+ * @file pitEntry.h
+ * @brief The embodiment of a PIT entry
+ *
+ * Embodies a PIT entry
+ *
+ */
+
+#ifndef pitEntry_h
+#define pitEntry_h
+
+#include <src/core/message.h>
+#include <src/core/numberSet.h>
+#include <src/core/ticks.h>
+#include <src/processor/fibEntry.h>
+
+struct pit_entry;
+typedef struct pit_entry PitEntry;
+
+/**
+ * @function pitEntry_Create
+ * @abstract Takes ownership of the message inside the PitEntry
+ * @discussion
+ *   When the PIT entry is destroyed, will call <code>message_Release()</code>
+ * on the message.
+ *
+ */
+PitEntry *pitEntry_Create(Message *message, Ticks expiryTime,
+                          Ticks CreationTime);
+
+/**
+ * Release a previously acquired reference to the specified instance,
+ * decrementing the reference count for the instance.
+ *
+ * The pointer to the instance is set to NULL as a side-effect of this function.
+ *
+ * If the invocation causes the last reference to the instance to be released,
+ * the instance is deallocated and the instance's implementation will perform
+ * additional cleanup and release other privately held references.
+ *
+ * @param [in,out] pitEntryPtr A pointer to a PitEntry instance pointer, which
+ * will be set to zero on return.
+ *
+ */
+void pitEntry_Release(PitEntry **pitEntryPtr);
+
+/**
+ * @function pitEntry_Acquire
+ * @abstract Returns a reference counted copy
+ * @discussion
+ *   A reference counted copy that shares the same state as the original.
+ *   Caller must use <code>pitEntry_Release()</code> on it when done.
+ *
+ * @return A reference counted copy, use Destroy on it.
+ */
+PitEntry *pitEntry_Acquire(PitEntry *original);
+
+/**
+ * @function pitEntry_AddIngressId
+ * @abstract Add an ingress connection id to the list of reverse paths
+ * @discussion
+ *   A PitEntry has two NumberSets.  The first is the set of ingress ports,
+ * which make up the reverse path.  The second is the set of egress ports, which
+ * make up its forward path.
+ *
+ *   This function tracks which reverse paths have sent us the interest.
+ *
+ * @param ingressId the reverse path
+ */
+void pitEntry_AddIngressId(PitEntry *pitEntry, unsigned ingressId);
+
+/**
+ * @function pitEntry_AddEgressId
+ * @abstract Add an egress connection id to the list of attempted paths
+ * @discussion
+ *   A PitEntry has two NumberSets.  The first is the set of ingress ports,
+ * which make up the reverse path.  The second is the set of egress ports, which
+ * make up its forward path.
+ *
+ *   This function tracks which forward paths we've tried for the interest.
+ *
+ * @param egressId the forwarded path
+ */
+void pitEntry_AddEgressId(PitEntry *pitEntry, unsigned egressId);
+
+void pitEntry_AddFibEntry(PitEntry *pitEntry, FibEntry *fibEntry);
+
+FibEntry *pitEntry_GetFibEntry(PitEntry *pitEntry);
+
+/**
+ * @function pitEntry_GetIngressSet
+ * @abstract The Ingress connection id set
+ * @discussion
+ *   You must acquire a copy of the number set if you will store the result.
+ * This is the internal reference.
+ *
+ * @return May be empty, will not be null.  Must be destroyed.
+ */
+const NumberSet *pitEntry_GetIngressSet(const PitEntry *pitEntry);
+
+/**
+ * @function pitEntry_GetEgressSet
+ * @abstract The Egress connection id set
+ * @discussion
+ *   You must acquire a copy of the number set if you will store the result.
+ * This is the internal reference.
+ *
+ * @param <#param1#>
+ * @return May be empty, will not be null.  Must be destroyed.
+ */
+const NumberSet *pitEntry_GetEgressSet(const PitEntry *pitEntry);
+
+/**
+ * @function pitEntry_GetMessage
+ * @abstract Gets the interest underpinning the PIT entry
+ * @discussion
+ *   A reference counted copy, call <code>Message_Release()</code> on it.
+ *
+ * @return A reference counted copy, call <code>Message_Release()</code> on it.
+ */
+Message *pitEntry_GetMessage(const PitEntry *pitEntry);
+
+/**
+ * Returns the time (in ticks) at which the PIT entry is no longer valid
+ *
+ * The ExpiryTime is computed when the PIT entry is added (or via
+ * pitEntry_SetExpiryTime). It is the aboslute time (in Ticks) at which the Pit
+ * entry is no longer valid.
+ *
+ * @param [in] PitEntry An allocated PIT entry
+ *
+ * @retval number The abosolute time (in Ticks) of the Expiry
+ */
+Ticks pitEntry_GetExpiryTime(const PitEntry *pitEntry);
+
+Ticks pitEntry_GetCreationTime(const PitEntry *pitEntry);
+/**
+ * Sets the ExpriyTime of the PIT entry to the given value
+ *
+ * It is probalby an error to set the expiryTime to a smaller value than
+ * currently set to, but this is not enforced.  PIT entries use lazy delete.
+ *
+ * @param [in] pitEntry The allocated PIT entry to modify
+ * @param [in] expiryTime The new expiryTime (UTC in forwarder Ticks)
+ *
+ */
+void pitEntry_SetExpiryTime(PitEntry *pitEntry, Ticks expiryTime);
+
+#endif  // pitEntry_h