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-rw-r--r--libtransport/src/hicn/transport/protocols/reassembly.cc78
1 files changed, 69 insertions, 9 deletions
diff --git a/libtransport/src/hicn/transport/protocols/reassembly.cc b/libtransport/src/hicn/transport/protocols/reassembly.cc
index 899f701c7..a2062df93 100644
--- a/libtransport/src/hicn/transport/protocols/reassembly.cc
+++ b/libtransport/src/hicn/transport/protocols/reassembly.cc
@@ -17,6 +17,7 @@
#include <hicn/transport/protocols/indexing_manager.h>
#include <hicn/transport/protocols/reassembly.h>
#include <hicn/transport/utils/array.h>
+#include <hicn/transport/utils/membuf.h>
namespace transport {
@@ -30,7 +31,8 @@ BaseReassembly::BaseReassembly(interface::ConsumerSocket *icn_socket,
manifest_index_manager_(
std::make_unique<ManifestIndexManager>(icn_socket)),
index_manager_(incremental_index_manager_.get()),
- index_(0) {
+ index_(0),
+ read_buffer_(nullptr) {
setContentCallback(content_callback);
}
@@ -54,30 +56,88 @@ void BaseReassembly::reassemble(ContentObject::Ptr &&content_object) {
void BaseReassembly::copyContent(const ContentObject &content_object) {
auto a = content_object.getPayload();
-
- std::shared_ptr<std::vector<uint8_t>> content_buffer;
- reassembly_consumer_socket_->getSocketOption(
- interface::GeneralTransportOptions::APPLICATION_BUFFER, content_buffer);
-
- content_buffer->insert(content_buffer->end(), (uint8_t *)a->data(),
- (uint8_t *)a->data() + a->length());
+ auto payload_length = a->length();
+ auto write_size = std::min(payload_length, read_buffer_->tailroom());
+ auto additional_bytes = payload_length > read_buffer_->tailroom()
+ ? payload_length - read_buffer_->tailroom()
+ : 0;
+
+ std::memcpy(read_buffer_->writableTail(), a->data(), write_size);
+ read_buffer_->append(write_size);
+
+ if (!read_buffer_->tailroom()) {
+ notifyApplication();
+ std::memcpy(read_buffer_->writableTail(), a->data() + write_size,
+ additional_bytes);
+ read_buffer_->append(additional_bytes);
+ }
bool download_completed =
index_manager_->getFinalSuffix() == content_object.getName().getSuffix();
if (TRANSPORT_EXPECT_FALSE(download_completed)) {
+ notifyApplication();
content_callback_->onContentReassembled(std::make_error_code(std::errc(0)));
}
}
+void BaseReassembly::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();
+ }
+}
+
void BaseReassembly::reset() {
manifest_index_manager_->reset();
incremental_index_manager_->reset();
index_ = index_manager_->getNextReassemblySegment();
received_packets_.clear();
+
+ // reset read buffer
+ interface::ConsumerSocket::ReadCallback *read_callback;
+ reassembly_consumer_socket_->getSocketOption(
+ interface::ConsumerCallbacksOptions::READ_CALLBACK, &read_callback);
+
+ read_buffer_ = utils::MemBuf::create(read_callback->maxBufferSize());
}
} // namespace protocol
-} // end namespace transport
+} // namespace transport