feat(hicn-ping): allow usage of random prefixes/suffixes in hicn-ping

Ref: HICN-783

Signed-off-by: Enrico Loparco (eloparco) <eloparco@cisco.com>
Change-Id: I41c804dd639ee15aee9619732f55e39a3baf1385

2 files changed, 73 insertions, 0 deletions

diff --git a/libtransport/includes/hicn/transport/utils/CMakeLists.txt b/libtransport/includes/hicn/transport/utils/CMakeLists.txt
index 1dba94451..060b83b63 100644
--- a/libtransport/includes/hicn/transport/utils/CMakeLists.txt
+++ b/libtransport/includes/hicn/transport/utils/CMakeLists.txt
@@ -34,6 +34,7 @@ list(APPEND HEADER_FILES
   ${CMAKE_CURRENT_SOURCE_DIR}/shared_ptr_utils.h
   ${CMAKE_CURRENT_SOURCE_DIR}/noncopyable.h
   ${CMAKE_CURRENT_SOURCE_DIR}/singleton.h
+  ${CMAKE_CURRENT_SOURCE_DIR}/traffic_generator.h
 )
 
 if(NOT WIN32)
diff --git a/libtransport/includes/hicn/transport/utils/traffic_generator.h b/libtransport/includes/hicn/transport/utils/traffic_generator.h
new file mode 100644
index 000000000..abd84886d
--- /dev/null
+++ b/libtransport/includes/hicn/transport/utils/traffic_generator.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2022 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.
+ */
+
+#pragma once
+
+#include <random>
+#include <string>
+
+namespace transport {
+
+class TrafficGenerator {
+ public:
+  TrafficGenerator(uint32_t count);
+  virtual ~TrafficGenerator() = default;
+  bool hasFinished();
+  uint32_t getSentCount();
+  virtual std::pair<std::string, uint32_t> getPrefixAndSuffix();
+
+  virtual std::string getPrefix() = 0;
+  virtual uint32_t getSuffix() = 0;
+  virtual void reset();
+
+ protected:
+  void onSuffixGenerated();
+
+  uint32_t count_;
+  uint32_t sent_;
+};
+
+/* Fixed prefix, incremental suffix */
+class IncrSuffixTrafficGenerator : public TrafficGenerator {
+ public:
+  explicit IncrSuffixTrafficGenerator(std::string prefix, uint32_t suffix,
+                                      uint32_t count);
+  std::string getPrefix() override;
+  uint32_t getSuffix() override;
+  void reset() override;
+
+ private:
+  std::string prefix_;
+  uint32_t suffix_;
+  uint32_t initial_suffix_;
+};
+
+/* Random prefix, random suffix */
+class RandomTrafficGenerator : public TrafficGenerator {
+ public:
+  static constexpr char NET_PREFIX[] = "2001:db8:1::/64";
+
+  RandomTrafficGenerator(uint32_t count, std::string net_prefix = NET_PREFIX);
+  std::string getPrefix() override;
+  uint32_t getSuffix() override;
+
+ private:
+  std::string net_prefix_;
+  std::default_random_engine rand_engine_;
+  std::uniform_int_distribution<uint32_t> uniform_distribution_;
+};
+
+}  // namespace transport
\ No newline at end of file