[HICN-534] Major rework on libtransport organization

Change-Id: I361b83a18b4fd59be136d5f0817fc28e17e89884
Signed-off-by: Mauro Sardara <msardara@cisco.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/libtransport/src/protocols/errors.h b/libtransport/src/protocols/errors.h
new file mode 100644
index 000000000..cb3d3474e
--- /dev/null
+++ b/libtransport/src/protocols/errors.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 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.
+ */
+
+#pragma once
+
+#include <string>
+#include <system_error>
+
+namespace transport {
+namespace protocol {
+
+/**
+ * @brief Get the default server error category.
+ * @return The default server error category instance.
+ *
+ * @warning The first call to this function is thread-safe only starting with
+ * C++11.
+ */
+const std::error_category& protocol_category();
+
+/**
+ * The list of errors.
+ */
+enum class protocol_error {
+  success = 0,
+  signature_verification_failed,
+  integrity_verification_failed,
+  no_verifier_provided,
+  io_error,
+  max_retransmissions_error,
+  session_aborted,
+};
+
+/**
+ * @brief Create an error_code instance for the given error.
+ * @param error The error.
+ * @return The error_code instance.
+ */
+inline std::error_code make_error_code(protocol_error error) {
+  return std::error_code(static_cast<int>(error), protocol_category());
+}
+
+/**
+ * @brief Create an error_condition instance for the given error.
+ * @param error The error.
+ * @return The error_condition instance.
+ */
+inline std::error_condition make_error_condition(protocol_error error) {
+  return std::error_condition(static_cast<int>(error), protocol_category());
+}
+
+/**
+ * @brief A server error category.
+ */
+class protocol_category_impl : public std::error_category {
+ public:
+  /**
+   * @brief Get the name of the category.
+   * @return The name of the category.
+   */
+  virtual const char* name() const throw();
+
+  /**
+   * @brief Get the error message for a given error.
+   * @param ev The error numeric value.
+   * @return The message associated to the error.
+   */
+  virtual std::string message(int ev) const;
+};
+}  // namespace protocol
+}  // namespace transport
+
+namespace std {
+// namespace system {
+template <>
+struct is_error_code_enum<::transport::protocol::protocol_error>
+    : public std::true_type {};
+// }  // namespace system
+}  // namespace std
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