1 files changed, 72 insertions, 0 deletions
diff --git a/libtransport/src/protocols/reassembly.cc b/libtransport/src/protocols/reassembly.cc
new file mode 100644
index 000000000..c6602153c
--- /dev/null
+++ b/libtransport/src/protocols/reassembly.cc
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+#include <hicn/transport/interfaces/socket_consumer.h>
+#include <hicn/transport/utils/array.h>
+#include <hicn/transport/utils/membuf.h>
+
+#include <implementation/socket_consumer.h>
+#include <protocols/errors.h>
+#include <protocols/indexer.h>
+#include <protocols/reassembly.h>
+
+namespace transport {
+
+namespace protocol {
+
+void Reassembly::notifyApplication() {
+  interface::ConsumerSocket::ReadCallback *read_callback = nullptr;
+  reassembly_consumer_socket_->getSocketOption(
+      interface::ConsumerCallbacksOptions::READ_CALLBACK, &read_callback);
+
+  if (TRANSPORT_EXPECT_FALSE(!read_callback)) {
+    TRANSPORT_LOGE("Read callback not installed!");
+    return;
+  }
+
+  if (read_callback->isBufferMovable()) {
+    // No need to perform an additional copy. The whole buffer will be
+    // tranferred to the application.
+
+    read_callback->readBufferAvailable(std::move(read_buffer_));
+    read_buffer_ = utils::MemBuf::create(read_callback->maxBufferSize());
+  } else {
+    // The buffer will be copied into the application-provided buffer
+    uint8_t *buffer;
+    std::size_t length;
+    std::size_t total_length = read_buffer_->length();
+
+    while (read_buffer_->length()) {
+      buffer = nullptr;
+      length = 0;
+      read_callback->getReadBuffer(&buffer, &length);
+
+      if (!buffer || !length) {
+        throw errors::RuntimeException(
+            "Invalid buffer provided by the application.");
+      }
+
+      auto to_copy = std::min(read_buffer_->length(), length);
+      std::memcpy(buffer, read_buffer_->data(), to_copy);
+      read_buffer_->trimStart(to_copy);
+    }
+
+    read_callback->readDataAvailable(total_length);
+    read_buffer_->clear();
+  }
+}
+
+}  // namespace protocol
+}  // namespace transport