Close connection on packet serialization failures in SerializePacket.
Protected by FLAGS_quic_reloadable_flag_quic_close_connection_on_serialization_failure.
PiperOrigin-RevId: 329331250
Change-Id: I04f27188e8c3288a58697f2b9bbaf825c0e3c652
diff --git a/quic/core/quic_packet_creator.cc b/quic/core/quic_packet_creator.cc
index 0bf8bdc..c06d167 100644
--- a/quic/core/quic_packet_creator.cc
+++ b/quic/core/quic_packet_creator.cc
@@ -133,6 +133,9 @@
fully_pad_crypto_handshake_packets_(true),
latched_hard_max_packet_length_(0),
max_datagram_frame_size_(0) {
+ if (close_connection_on_serialization_failure_) {
+ QUIC_RELOADABLE_FLAG_COUNT(quic_close_connection_on_serialization_failure);
+ }
SetMaxPacketLength(kDefaultMaxPacketSize);
if (!framer_->version().UsesTls()) {
// QUIC+TLS negotiates the maximum datagram frame size via the
@@ -470,12 +473,18 @@
}
DCHECK_EQ(nullptr, packet_.encrypted_buffer);
- SerializePacket(std::move(external_buffer), kMaxOutgoingPacketSize);
+ const bool success =
+ SerializePacket(std::move(external_buffer), kMaxOutgoingPacketSize);
+ if (close_connection_on_serialization_failure_ && !success) {
+ return;
+ }
OnSerializedPacket();
}
void QuicPacketCreator::OnSerializedPacket() {
- if (packet_.encrypted_buffer == nullptr) {
+ if (close_connection_on_serialization_failure_) {
+ QUIC_BUG_IF(packet_.encrypted_buffer == nullptr);
+ } else if (packet_.encrypted_buffer == nullptr) {
const std::string error_details = "Failed to SerializePacket.";
QUIC_BUG << error_details;
delegate_->OnUnrecoverableError(QUIC_FAILED_TO_SERIALIZE_PACKET,
@@ -543,8 +552,11 @@
return 0;
}
}
- SerializePacket(QuicOwnedPacketBuffer(buffer, nullptr), buffer_len);
- // TODO(b/166255274): report unrecoverable error on serialization failures.
+ const bool success =
+ SerializePacket(QuicOwnedPacketBuffer(buffer, nullptr), buffer_len);
+ if (close_connection_on_serialization_failure_ && !success) {
+ return 0;
+ }
const size_t encrypted_length = packet_.encrypted_length;
// Clear frames in packet_. No need to DeleteFrames since frames are owned by
// initial_packet.
@@ -562,6 +574,7 @@
bool fin,
TransmissionType transmission_type,
size_t* num_bytes_consumed) {
+ // TODO(b/167222597): consider using ScopedSerializationFailureHandler.
DCHECK(queued_frames_.empty());
DCHECK(!QuicUtils::IsCryptoStreamId(transport_version(), id));
// Write out the packet header
@@ -738,11 +751,22 @@
return false;
}
-void QuicPacketCreator::SerializePacket(QuicOwnedPacketBuffer encrypted_buffer,
+bool QuicPacketCreator::SerializePacket(QuicOwnedPacketBuffer encrypted_buffer,
size_t encrypted_buffer_len) {
- const bool use_queued_frames_cleaner = GetQuicReloadableFlag(
- quic_neuter_initial_packet_in_coalescer_with_initial_key_discarded);
- ScopedQueuedFramesCleaner cleaner(use_queued_frames_cleaner ? this : nullptr);
+ if (close_connection_on_serialization_failure_ &&
+ packet_.encrypted_buffer != nullptr) {
+ const std::string error_details =
+ "Packet's encrypted buffer is not empty before serialization";
+ QUIC_BUG << error_details;
+ delegate_->OnUnrecoverableError(QUIC_FAILED_TO_SERIALIZE_PACKET,
+ error_details);
+ return false;
+ }
+ const bool use_handler =
+ GetQuicReloadableFlag(
+ quic_neuter_initial_packet_in_coalescer_with_initial_key_discarded) ||
+ close_connection_on_serialization_failure_;
+ ScopedSerializationFailureHandler handler(use_handler ? this : nullptr);
DCHECK_LT(0u, encrypted_buffer_len);
QUIC_BUG_IF(queued_frames_.empty() && pending_padding_bytes_ == 0)
@@ -772,7 +796,7 @@
<< QuicFramesToString(queued_frames_)
<< " at missing encryption_level " << packet_.encryption_level
<< " using " << framer_->version();
- return;
+ return false;
}
DCHECK_GE(max_plaintext_size_, packet_size_);
@@ -790,7 +814,7 @@
<< latched_hard_max_packet_length_
<< ", max_packet_length_: " << max_packet_length_
<< ", header: " << header;
- return;
+ return false;
}
// ACK Frames will be truncated due to length only if they're the only frame
@@ -811,11 +835,11 @@
encrypted_buffer_len, encrypted_buffer.buffer);
if (encrypted_length == 0) {
QUIC_BUG << "Failed to encrypt packet number " << packet_.packet_number;
- return;
+ return false;
}
packet_size_ = 0;
- if (!use_queued_frames_cleaner) {
+ if (!use_handler) {
queued_frames_.clear();
}
packet_.encrypted_buffer = encrypted_buffer.buffer;
@@ -823,6 +847,7 @@
encrypted_buffer.buffer = nullptr;
packet_.release_encrypted_buffer = std::move(encrypted_buffer).release_buffer;
+ return true;
}
std::unique_ptr<QuicEncryptedPacket>
@@ -1983,15 +2008,25 @@
creator_->SetDefaultPeerAddress(old_peer_address_);
}
-QuicPacketCreator::ScopedQueuedFramesCleaner::ScopedQueuedFramesCleaner(
- QuicPacketCreator* creator)
+QuicPacketCreator::ScopedSerializationFailureHandler::
+ ScopedSerializationFailureHandler(QuicPacketCreator* creator)
: creator_(creator) {}
-QuicPacketCreator::ScopedQueuedFramesCleaner::~ScopedQueuedFramesCleaner() {
+QuicPacketCreator::ScopedSerializationFailureHandler::
+ ~ScopedSerializationFailureHandler() {
if (creator_ == nullptr) {
return;
}
+ // Always clear queued_frames_.
creator_->queued_frames_.clear();
+
+ if (creator_->close_connection_on_serialization_failure_ &&
+ creator_->packet_.encrypted_buffer == nullptr) {
+ const std::string error_details = "Failed to SerializePacket.";
+ QUIC_BUG << error_details;
+ creator_->delegate_->OnUnrecoverableError(QUIC_FAILED_TO_SERIALIZE_PACKET,
+ error_details);
+ }
}
void QuicPacketCreator::set_encryption_level(EncryptionLevel level) {
diff --git a/quic/core/quic_packet_creator.h b/quic/core/quic_packet_creator.h
index 02bc9e3..a82cec4 100644
--- a/quic/core/quic_packet_creator.h
+++ b/quic/core/quic_packet_creator.h
@@ -27,6 +27,7 @@
#include "net/third_party/quiche/src/quic/core/quic_packets.h"
#include "net/third_party/quiche/src/quic/core/quic_types.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_macros.h"
#include "net/third_party/quiche/src/common/platform/api/quiche_string_piece.h"
namespace quic {
@@ -472,11 +473,12 @@
private:
friend class test::QuicPacketCreatorPeer;
- // Used to clear queued_frames_ of creator upon exiting the scope.
- class QUIC_EXPORT_PRIVATE ScopedQueuedFramesCleaner {
+ // Used to 1) clear queued_frames_, 2) report unrecoverable error (if
+ // serialization fails) upon exiting the scope.
+ class QUIC_EXPORT_PRIVATE ScopedSerializationFailureHandler {
public:
- explicit ScopedQueuedFramesCleaner(QuicPacketCreator* creator);
- ~ScopedQueuedFramesCleaner();
+ explicit ScopedSerializationFailureHandler(QuicPacketCreator* creator);
+ ~ScopedSerializationFailureHandler();
private:
QuicPacketCreator* creator_; // Unowned.
@@ -507,10 +509,11 @@
// Serializes all frames which have been added and adds any which should be
// retransmitted to packet_.retransmittable_frames. All frames must fit into
- // a single packet.
- // Fails if |encrypted_buffer_len| isn't long enough for the encrypted packet.
- void SerializePacket(QuicOwnedPacketBuffer encrypted_buffer,
- size_t encrypted_buffer_len);
+ // a single packet. Returns true on success, otherwise, returns false.
+ // Fails if |encrypted_buffer| is not large enough for the encrypted packet.
+ QUIC_MUST_USE_RESULT bool SerializePacket(
+ QuicOwnedPacketBuffer encrypted_buffer,
+ size_t encrypted_buffer_len);
// Called after a new SerialiedPacket is created to call the delegate's
// OnSerializedPacket and reset state.
@@ -663,6 +666,9 @@
const bool coalesced_packet_of_higher_space_ =
GetQuicReloadableFlag(quic_coalesced_packet_of_higher_space2);
+
+ const bool close_connection_on_serialization_failure_ =
+ GetQuicReloadableFlag(quic_close_connection_on_serialization_failure);
};
} // namespace quic
