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authorLuca Muscariello <muscariello@ieee.org>2021-04-15 09:05:46 +0200
committerMauro Sardara <msardara@cisco.com>2021-04-15 16:36:16 +0200
commite92e9e839ca2cf42b56322b2489ccc0d8bf767af (patch)
tree9f1647c83a87fbf982ae329e800af25dbfb226b5 /libtransport/src/utils/membuf.cc
parent3e541d7c947cc2f9db145f26c9274efd29a6fb56 (diff)
[HICN-690] Transport Library Major Refactory
The current patch provides a major refactory of the transportlibrary. A summary of the different components that underwent major modifications is reported below. - Transport protocol updates The hierarchy of classes has been optimized to have common transport services across different transport protocols. This can allow to customize a transport protocol with new features. - A new real-time communication protocol The RTC protocol has been optimized in terms of algorithms to reduce consumer-producer synchronization latency. - A novel socket API The API has been reworked to be easier to consumer but also to have a more efficient integration in L4 proxies. - Several performance improvements A large number of performance improvements have been included in particular to make the entire stack zero-copy and optimize cache miss. - New memory buffer framework Memory management has been reworked entirely to provide a more efficient infra with a richer API. Buffers are now allocated in blocks and a single buffer holds the memory for (1) the shared_ptr control block, (2) the metadata of the packet (e.g. name, pointer to other buffers if buffer is chained and relevant offsets), and (3) the packet itself, as it is sent/received over the network. - A new slab allocator Dynamic memory allocation is now managed by a novel slab allocator that is optimised for packet processing and connection management. Memory is organized in pools of blocks all of the same size which are used during the processing of outgoing/incoming packets. When a memory block Is allocated is always taken from a global pool and when it is deallocated is returned to the pool, thus avoiding the cost of any heap allocation in the data path. - New transport connectors Consumer and producer end-points can communication either using an hicn packet forwarder or with direct connector based on shared memories or sockets. The usage of transport connectors typically for unit and funcitonal testing but may have additional usage. - Support for FEC/ECC for transport services FEC/ECC via reed solomon is supported by default and made available to transport services as a modular component. Reed solomon block codes is a default FEC model that can be replaced in a modular way by many other codes including RLNC not avaiable in this distribution. The current FEC framework support variable size padding and efficiently makes use of the infra memory buffers to avoid additiona copies. - Secure transport framework for signature computation and verification Crypto support is nativelty used in hICN for integrity and authenticity. Novel support that includes RTC has been implemented and made modular and reusable acrosso different transport protocols. - TLS - Transport layer security over hicn Point to point confidentiality is provided by integrating TLS on top of hICN reliable and non-reliable transport. The integration is common and makes a different use of the TLS record. - MLS - Messaging layer security over hicn MLS integration on top of hICN is made by using the MLSPP implemetation open sourced by Cisco. We have included instrumentation tools to deploy performance and functional tests of groups of end-points. - Android support The overall code has been heavily tested in Android environments and has received heavy lifting to better run natively in recent Android OS. Co-authored-by: Mauro Sardara <msardara@cisco.com> Co-authored-by: Michele Papalini <micpapal@cisco.com> Co-authored-by: Olivier Roques <oroques+fdio@cisco.com> Co-authored-by: Giulio Grassi <gigrassi@cisco.com> Change-Id: If477ba2fa686e6f47bdf96307ac60938766aef69 Signed-off-by: Luca Muscariello <muscariello@ieee.org>
Diffstat (limited to 'libtransport/src/utils/membuf.cc')
-rw-r--r--libtransport/src/utils/membuf.cc44
1 files changed, 38 insertions, 6 deletions
diff --git a/libtransport/src/utils/membuf.cc b/libtransport/src/utils/membuf.cc
index 94e5b13a1..73c45cf6d 100644
--- a/libtransport/src/utils/membuf.cc
+++ b/libtransport/src/utils/membuf.cc
@@ -145,6 +145,18 @@ void MemBuf::operator delete(void* /* ptr */, void* /* placement */) {
// constructor.
}
+bool MemBuf::operator==(const MemBuf& other) {
+ if (length() != other.length()) {
+ return false;
+ }
+
+ return (memcmp(data(), other.data(), length()) == 0);
+}
+
+bool MemBuf::operator!=(const MemBuf& other) {
+ return !this->operator==(other);
+}
+
void MemBuf::releaseStorage(HeapStorage* storage, uint16_t freeFlags) {
// Use relaxed memory order here. If we are unlucky and happen to get
// out-of-date data the compare_exchange_weak() call below will catch
@@ -299,21 +311,23 @@ unique_ptr<MemBuf> MemBuf::takeOwnership(void* buf, std::size_t capacity,
}
}
-MemBuf::MemBuf(WrapBufferOp, const void* buf, std::size_t capacity) noexcept
+MemBuf::MemBuf(WrapBufferOp, const void* buf, std::size_t length,
+ std::size_t capacity) noexcept
: MemBuf(InternalConstructor(), 0,
// We cast away the const-ness of the buffer here.
// This is okay since MemBuf users must use unshare() to create a
// copy of this buffer before writing to the buffer.
static_cast<uint8_t*>(const_cast<void*>(buf)), capacity,
- static_cast<uint8_t*>(const_cast<void*>(buf)), capacity) {}
+ static_cast<uint8_t*>(const_cast<void*>(buf)), length) {}
-unique_ptr<MemBuf> MemBuf::wrapBuffer(const void* buf, std::size_t capacity) {
- return std::make_unique<MemBuf>(WRAP_BUFFER, buf, capacity);
+unique_ptr<MemBuf> MemBuf::wrapBuffer(const void* buf, std::size_t length,
+ std::size_t capacity) {
+ return std::make_unique<MemBuf>(WRAP_BUFFER, buf, length, capacity);
}
-MemBuf MemBuf::wrapBufferAsValue(const void* buf,
+MemBuf MemBuf::wrapBufferAsValue(const void* buf, std::size_t length,
std::size_t capacity) noexcept {
- return MemBuf(WrapBufferOp::WRAP_BUFFER, buf, capacity);
+ return MemBuf(WrapBufferOp::WRAP_BUFFER, buf, length, capacity);
}
MemBuf::MemBuf() noexcept {}
@@ -862,4 +876,22 @@ void MemBuf::initExtBuffer(uint8_t* buf, size_t mallocSize,
*infoReturn = sharedInfo;
}
+bool MemBuf::ensureCapacity(std::size_t capacity) {
+ return !isChained() && std::size_t((bufferEnd() - data())) >= capacity;
+}
+
+bool MemBuf::ensureCapacityAndFillUnused(std::size_t capacity,
+ uint8_t placeholder) {
+ auto ret = ensureCapacity(capacity);
+ if (!ret) {
+ return ret;
+ }
+
+ if (length() < capacity) {
+ std::memset(writableTail(), placeholder, capacity - length());
+ }
+
+ return ret;
+}
+
} // namespace utils \ No newline at end of file