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#pragma once
#include <library/cpp/actors/core/event_pb.h>
#include <library/cpp/actors/core/event_load.h>
#include <library/cpp/actors/core/events.h>
#include <library/cpp/actors/core/actor.h>
#include <library/cpp/containers/stack_vector/stack_vec.h>
#include <library/cpp/actors/util/rope.h>
#include <library/cpp/actors/prof/tag.h>
#include <library/cpp/actors/wilson/wilson_span.h>
#include <library/cpp/digest/crc32c/crc32c.h>
#include <library/cpp/lwtrace/shuttle.h>
#include <util/generic/string.h>
#include <util/generic/list.h>
#include "types.h"
#include "outgoing_stream.h"
#ifndef FORCE_EVENT_CHECKSUM
#define FORCE_EVENT_CHECKSUM 0
#endif
Y_FORCE_INLINE ui32 Crc32cExtendMSanCompatible(ui32 checksum, const void *data, size_t len) {
if constexpr (NSan::MSanIsOn()) {
const char *begin = static_cast<const char*>(data);
const char *end = begin + len;
begin -= reinterpret_cast<uintptr_t>(begin) & 15;
end += -reinterpret_cast<uintptr_t>(end) & 15;
NSan::Unpoison(begin, end - begin);
}
return Crc32cExtend(checksum, data, len);
}
#pragma pack(push, 1)
struct TTcpPacketHeader_v2 {
ui64 Confirm;
ui64 Serial;
ui32 Checksum; // for the whole frame
ui16 PayloadLength;
};
#pragma pack(pop)
struct TTcpPacketBuf {
static constexpr ui64 PingRequestMask = 0x8000000000000000ULL;
static constexpr ui64 PingResponseMask = 0x4000000000000000ULL;
static constexpr ui64 ClockMask = 0x2000000000000000ULL;
static constexpr size_t PacketDataLen = 4096 * 2 - 96 - sizeof(TTcpPacketHeader_v2);
};
struct TEventData {
ui32 Type;
ui32 Flags;
TActorId Recipient;
TActorId Sender;
ui64 Cookie;
NWilson::TTraceId TraceId;
ui32 Checksum;
};
#pragma pack(push, 1)
struct TEventDescr2 {
ui32 Type;
ui32 Flags;
TActorId Recipient;
TActorId Sender;
ui64 Cookie;
NWilson::TTraceId::TSerializedTraceId TraceId;
ui32 Checksum;
};
#pragma pack(pop)
struct TEventHolder : TNonCopyable {
TEventData Descr;
TActorId ForwardRecipient;
THolder<IEventBase> Event;
TIntrusivePtr<TEventSerializedData> Buffer;
ui64 Serial;
ui32 EventSerializedSize;
ui32 EventActuallySerialized;
mutable NLWTrace::TOrbit Orbit;
NWilson::TSpan Span;
ui32 Fill(IEventHandle& ev);
void InitChecksum() {
Descr.Checksum = 0;
}
void UpdateChecksum(const void *buffer, size_t len) {
if (FORCE_EVENT_CHECKSUM) {
Descr.Checksum = Crc32cExtendMSanCompatible(Descr.Checksum, buffer, len);
}
}
void ForwardOnNondelivery(bool unsure) {
TEventData& d = Descr;
const TActorId& r = d.Recipient;
const TActorId& s = d.Sender;
const TActorId *f = ForwardRecipient ? &ForwardRecipient : nullptr;
Span.EndError("nondelivery");
auto ev = Event
? std::make_unique<IEventHandle>(r, s, Event.Release(), d.Flags, d.Cookie, f, Span.GetTraceId())
: std::make_unique<IEventHandle>(d.Type, d.Flags, r, s, std::move(Buffer), d.Cookie, f, Span.GetTraceId());
NActors::TActivationContext::Send(IEventHandle::ForwardOnNondelivery(std::move(ev), NActors::TEvents::TEvUndelivered::Disconnected, unsure));
}
void Clear() {
Event.Reset();
Buffer.Reset();
Orbit.Reset();
Span = {};
}
};
namespace NActors {
class TEventOutputChannel;
}
struct TTcpPacketOutTask : TNonCopyable {
const TSessionParams& Params;
NInterconnect::TOutgoingStream& OutgoingStream;
NInterconnect::TOutgoingStream::TBookmark HeaderBookmark;
size_t DataSize = 0;
mutable NLWTrace::TOrbit Orbit;
TTcpPacketOutTask(const TSessionParams& params, NInterconnect::TOutgoingStream& outgoingStream)
: Params(params)
, OutgoingStream(outgoingStream)
, HeaderBookmark(OutgoingStream.Bookmark(sizeof(TTcpPacketHeader_v2)))
{}
// Preallocate some space to fill it later.
NInterconnect::TOutgoingStream::TBookmark Bookmark(size_t len) {
Y_VERIFY_DEBUG(len <= GetVirtualFreeAmount());
DataSize += len;
return OutgoingStream.Bookmark(len);
}
// Write previously bookmarked space.
void WriteBookmark(NInterconnect::TOutgoingStream::TBookmark&& bookmark, const void *buffer, size_t len) {
OutgoingStream.WriteBookmark(std::move(bookmark), {static_cast<const char*>(buffer), len});
}
// Acquire raw pointer to write some data.
TMutableContiguousSpan AcquireSpanForWriting() {
return OutgoingStream.AcquireSpanForWriting(GetVirtualFreeAmount());
}
// Append reference to some data (acquired previously or external pointer).
void Append(const void *buffer, size_t len) {
Y_VERIFY_DEBUG(len <= GetVirtualFreeAmount());
DataSize += len;
OutgoingStream.Append({static_cast<const char*>(buffer), len});
}
// Write some data with copying.
void Write(const void *buffer, size_t len) {
Y_VERIFY_DEBUG(len <= GetVirtualFreeAmount());
DataSize += len;
OutgoingStream.Write({static_cast<const char*>(buffer), len});
}
void Finish(ui64 serial, ui64 confirm) {
Y_VERIFY(DataSize <= Max<ui16>());
TTcpPacketHeader_v2 header{
confirm,
serial,
0,
static_cast<ui16>(DataSize)
};
if (Checksumming()) {
// pre-write header without checksum for correct checksum calculation
WriteBookmark(NInterconnect::TOutgoingStream::TBookmark(HeaderBookmark), &header, sizeof(header));
size_t total = 0;
ui32 checksum = 0;
OutgoingStream.ScanLastBytes(GetFullSize(), [&](TContiguousSpan span) {
checksum = Crc32cExtendMSanCompatible(checksum, span.data(), span.size());
total += span.size();
});
header.Checksum = checksum;
Y_VERIFY(total == sizeof(header) + DataSize, "total# %zu DataSize# %zu GetFullSize# %zu", total, DataSize,
GetFullSize());
}
WriteBookmark(std::exchange(HeaderBookmark, {}), &header, sizeof(header));
}
bool Checksumming() const {
return !Params.Encryption;
}
bool IsFull() const { return GetVirtualFreeAmount() == 0; }
bool IsEmpty() const { return GetDataSize() == 0; }
size_t GetDataSize() const { return DataSize; }
size_t GetFullSize() const { return sizeof(TTcpPacketHeader_v2) + GetDataSize(); }
size_t GetVirtualFreeAmount() const { return TTcpPacketBuf::PacketDataLen - DataSize; }
};
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