1 files changed, 62 insertions, 0 deletions
diff --git a/libtransport/src/protocols/fec/fec_info.h b/libtransport/src/protocols/fec/fec_info.h
new file mode 100644
index 000000000..bdfc4d3af
--- /dev/null
+++ b/libtransport/src/protocols/fec/fec_info.h
@@ -0,0 +1,62 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <hicn/transport/errors/not_implemented_exception.h>
+
+namespace transport {
+namespace protocol {
+
+namespace fec {
+
+template <typename T>
+struct FecInfo {
+  static bool isFec() { throw errors::NotImplementedException(); }
+  static uint32_t nextSymbol(uint32_t index) {
+    throw errors::NotImplementedException();
+  }
+  static uint32_t nextSource(uint32_t index) {
+    throw errors::NotImplementedException();
+  }
+};
+
+template <uint32_t K, uint32_t N>
+struct Code {};
+
+template <uint32_t K, uint32_t N>
+struct FecInfo<Code<K, N>> {
+  static bool isFec(uint32_t index) { return (index % N) >= K; }
+
+  static uint32_t nextSymbol(uint32_t index) {
+    if (isFec(index)) {
+      return index;
+    }
+
+    return index + (K - (index % N));
+  }
+
+  static uint32_t nextSource(uint32_t index) {
+    if (!isFec(index)) {
+      return index;
+    }
+
+    return index + (N - (index % N));
+  }
+};
+
+}  // namespace fec
+}  // namespace protocol
+}  // namespace transport
+\ No newline at end of file