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-rw-r--r--libtransport/src/protocols/reassembly.cc72
1 files changed, 72 insertions, 0 deletions
diff --git a/libtransport/src/protocols/reassembly.cc b/libtransport/src/protocols/reassembly.cc
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+++ b/libtransport/src/protocols/reassembly.cc
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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.
+ */
+
+#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