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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "net/quic/core/quic_connection.h" | 5 #include "net/quic/core/quic_connection.h" |
| 6 | 6 |
| 7 #include <string.h> | 7 #include <string.h> |
| 8 #include <sys/types.h> | 8 #include <sys/types.h> |
| 9 | 9 |
| 10 #include <algorithm> | 10 #include <algorithm> |
| 11 #include <iterator> | 11 #include <iterator> |
| 12 #include <limits> | 12 #include <limits> |
| 13 #include <memory> | 13 #include <memory> |
| 14 #include <set> | 14 #include <set> |
| 15 #include <utility> | 15 #include <utility> |
| 16 | 16 |
| 17 #include "base/format_macros.h" | 17 #include "base/format_macros.h" |
| 18 #include "base/logging.h" | 18 #include "base/logging.h" |
| 19 #include "base/macros.h" | 19 #include "base/macros.h" |
| 20 #include "base/metrics/histogram_macros.h" | 20 #include "base/metrics/histogram_macros.h" |
| 21 #include "base/stl_util.h" | 21 #include "base/stl_util.h" |
| 22 #include "base/strings/string_number_conversions.h" | |
| 23 #include "base/strings/stringprintf.h" | |
| 24 #include "net/base/address_family.h" | 22 #include "net/base/address_family.h" |
| 25 #include "net/base/ip_address.h" | 23 #include "net/base/ip_address.h" |
| 26 #include "net/base/net_errors.h" | 24 #include "net/base/net_errors.h" |
| 27 #include "net/quic/core/crypto/crypto_protocol.h" | 25 #include "net/quic/core/crypto/crypto_protocol.h" |
| 28 #include "net/quic/core/crypto/quic_decrypter.h" | 26 #include "net/quic/core/crypto/quic_decrypter.h" |
| 29 #include "net/quic/core/crypto/quic_encrypter.h" | 27 #include "net/quic/core/crypto/quic_encrypter.h" |
| 30 #include "net/quic/core/proto/cached_network_parameters.pb.h" | 28 #include "net/quic/core/proto/cached_network_parameters.pb.h" |
| 31 #include "net/quic/core/quic_bandwidth.h" | 29 #include "net/quic/core/quic_bandwidth.h" |
| 32 #include "net/quic/core/quic_bug_tracker.h" | 30 #include "net/quic/core/quic_bug_tracker.h" |
| 33 #include "net/quic/core/quic_config.h" | 31 #include "net/quic/core/quic_config.h" |
| 34 #include "net/quic/core/quic_flags.h" | 32 #include "net/quic/core/quic_flags.h" |
| 35 #include "net/quic/core/quic_packet_generator.h" | 33 #include "net/quic/core/quic_packet_generator.h" |
| 36 #include "net/quic/core/quic_pending_retransmission.h" | 34 #include "net/quic/core/quic_pending_retransmission.h" |
| 37 #include "net/quic/core/quic_sent_packet_manager.h" | 35 #include "net/quic/core/quic_sent_packet_manager.h" |
| 38 #include "net/quic/core/quic_utils.h" | 36 #include "net/quic/core/quic_utils.h" |
| 39 #include "net/quic/platform/api/quic_str_cat.h" | 37 #include "net/quic/platform/api/quic_str_cat.h" |
| 38 #include "net/quic/platform/api/quic_text_utils.h" |
| 40 | 39 |
| 41 using base::StringPiece; | 40 using base::StringPiece; |
| 42 using base::StringPrintf; | |
| 43 using std::string; | 41 using std::string; |
| 44 | 42 |
| 45 namespace net { | 43 namespace net { |
| 46 | 44 |
| 47 class QuicDecrypter; | 45 class QuicDecrypter; |
| 48 class QuicEncrypter; | 46 class QuicEncrypter; |
| 49 | 47 |
| 50 namespace { | 48 namespace { |
| 51 | 49 |
| 52 // The largest gap in packets we'll accept without closing the connection. | 50 // The largest gap in packets we'll accept without closing the connection. |
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| 1006 if (should_last_packet_instigate_acks_ && !ack_queued_) { | 1004 if (should_last_packet_instigate_acks_ && !ack_queued_) { |
| 1007 ++num_retransmittable_packets_received_since_last_ack_sent_; | 1005 ++num_retransmittable_packets_received_since_last_ack_sent_; |
| 1008 if (ack_mode_ != TCP_ACKING && | 1006 if (ack_mode_ != TCP_ACKING && |
| 1009 last_header_.packet_number > kMinReceivedBeforeAckDecimation) { | 1007 last_header_.packet_number > kMinReceivedBeforeAckDecimation) { |
| 1010 // Ack up to 10 packets at once. | 1008 // Ack up to 10 packets at once. |
| 1011 if (num_retransmittable_packets_received_since_last_ack_sent_ >= | 1009 if (num_retransmittable_packets_received_since_last_ack_sent_ >= |
| 1012 kMaxRetransmittablePacketsBeforeAck) { | 1010 kMaxRetransmittablePacketsBeforeAck) { |
| 1013 ack_queued_ = true; | 1011 ack_queued_ = true; |
| 1014 } else if (!ack_alarm_->IsSet()) { | 1012 } else if (!ack_alarm_->IsSet()) { |
| 1015 // Wait the minimum of a quarter min_rtt and the delayed ack time. | 1013 // Wait the minimum of a quarter min_rtt and the delayed ack time. |
| 1016 QuicTime::Delta ack_delay = std::min( | 1014 QuicTime::Delta ack_delay = |
| 1017 DelayedAckTime(), sent_packet_manager_->GetRttStats()->min_rtt() * | 1015 std::min(DelayedAckTime(), |
| 1018 ack_decimation_delay_); | 1016 sent_packet_manager_->GetRttStats()->min_rtt() * |
| 1017 ack_decimation_delay_); |
| 1019 ack_alarm_->Set(clock_->ApproximateNow() + ack_delay); | 1018 ack_alarm_->Set(clock_->ApproximateNow() + ack_delay); |
| 1020 } | 1019 } |
| 1021 } else { | 1020 } else { |
| 1022 // Ack with a timer or every 2 packets by default. | 1021 // Ack with a timer or every 2 packets by default. |
| 1023 if (num_retransmittable_packets_received_since_last_ack_sent_ >= | 1022 if (num_retransmittable_packets_received_since_last_ack_sent_ >= |
| 1024 kDefaultRetransmittablePacketsBeforeAck) { | 1023 kDefaultRetransmittablePacketsBeforeAck) { |
| 1025 ack_queued_ = true; | 1024 ack_queued_ = true; |
| 1026 } else if (!ack_alarm_->IsSet()) { | 1025 } else if (!ack_alarm_->IsSet()) { |
| 1027 ack_alarm_->Set(clock_->ApproximateNow() + DelayedAckTime()); | 1026 ack_alarm_->Set(clock_->ApproximateNow() + DelayedAckTime()); |
| 1028 } | 1027 } |
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| 1570 DCHECK_LE(encrypted_length, kMaxPacketSize); | 1569 DCHECK_LE(encrypted_length, kMaxPacketSize); |
| 1571 DCHECK_LE(encrypted_length, packet_generator_.GetCurrentMaxPacketLength()); | 1570 DCHECK_LE(encrypted_length, packet_generator_.GetCurrentMaxPacketLength()); |
| 1572 DVLOG(1) << ENDPOINT << "Sending packet " << packet_number << " : " | 1571 DVLOG(1) << ENDPOINT << "Sending packet " << packet_number << " : " |
| 1573 << (IsRetransmittable(*packet) == HAS_RETRANSMITTABLE_DATA | 1572 << (IsRetransmittable(*packet) == HAS_RETRANSMITTABLE_DATA |
| 1574 ? "data bearing " | 1573 ? "data bearing " |
| 1575 : " ack only ") | 1574 : " ack only ") |
| 1576 << ", encryption level: " | 1575 << ", encryption level: " |
| 1577 << QuicUtils::EncryptionLevelToString(packet->encryption_level) | 1576 << QuicUtils::EncryptionLevelToString(packet->encryption_level) |
| 1578 << ", encrypted length:" << encrypted_length; | 1577 << ", encrypted length:" << encrypted_length; |
| 1579 DVLOG(2) << ENDPOINT << "packet(" << packet_number << "): " << std::endl | 1578 DVLOG(2) << ENDPOINT << "packet(" << packet_number << "): " << std::endl |
| 1580 << QuicUtils::HexDump( | 1579 << QuicTextUtils::HexDump( |
| 1581 StringPiece(packet->encrypted_buffer, encrypted_length)); | 1580 StringPiece(packet->encrypted_buffer, encrypted_length)); |
| 1582 | 1581 |
| 1583 // Measure the RTT from before the write begins to avoid underestimating the | 1582 // Measure the RTT from before the write begins to avoid underestimating the |
| 1584 // min_rtt_, especially in cases where the thread blocks or gets swapped out | 1583 // min_rtt_, especially in cases where the thread blocks or gets swapped out |
| 1585 // during the WritePacket below. | 1584 // during the WritePacket below. |
| 1586 QuicTime packet_send_time = clock_->Now(); | 1585 QuicTime packet_send_time = clock_->Now(); |
| 1587 WriteResult result = writer_->WritePacket( | 1586 WriteResult result = writer_->WritePacket( |
| 1588 packet->encrypted_buffer, encrypted_length, self_address().host(), | 1587 packet->encrypted_buffer, encrypted_length, self_address().host(), |
| 1589 peer_address(), per_packet_options_); | 1588 peer_address(), per_packet_options_); |
| 1590 if (result.error_code == ERR_IO_PENDING) { | 1589 if (result.error_code == ERR_IO_PENDING) { |
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| 2458 | 2457 |
| 2459 void QuicConnection::CheckIfApplicationLimited() { | 2458 void QuicConnection::CheckIfApplicationLimited() { |
| 2460 if (queued_packets_.empty() && | 2459 if (queued_packets_.empty() && |
| 2461 !sent_packet_manager_->HasPendingRetransmissions() && | 2460 !sent_packet_manager_->HasPendingRetransmissions() && |
| 2462 !visitor_->WillingAndAbleToWrite()) { | 2461 !visitor_->WillingAndAbleToWrite()) { |
| 2463 sent_packet_manager_->OnApplicationLimited(); | 2462 sent_packet_manager_->OnApplicationLimited(); |
| 2464 } | 2463 } |
| 2465 } | 2464 } |
| 2466 | 2465 |
| 2467 } // namespace net | 2466 } // namespace net |
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