Initial import.

1 files changed, 355 insertions, 0 deletions

diff --git a/chromium/net/quic/quic_config.cc b/chromium/net/quic/quic_config.cc
new file mode 100644
index 00000000000..545d4c165e4
--- /dev/null
+++ b/chromium/net/quic/quic_config.cc
@@ -0,0 +1,355 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/quic/quic_config.h"
+
+#include <algorithm>
+
+#include "base/logging.h"
+
+using std::string;
+
+namespace net {
+
+QuicNegotiableValue::QuicNegotiableValue(QuicTag tag, Presence presence)
+    : tag_(tag),
+      presence_(presence),
+      negotiated_(false) {
+}
+
+QuicNegotiableUint32::QuicNegotiableUint32(QuicTag tag, Presence presence)
+    : QuicNegotiableValue(tag, presence) {
+}
+
+void QuicNegotiableUint32::set(uint32 max, uint32 default_value) {
+  DCHECK_LE(default_value, max);
+  max_value_ = max;
+  default_value_ = default_value;
+}
+
+uint32 QuicNegotiableUint32::GetUint32() const {
+  if (negotiated_) {
+    return negotiated_value_;
+  }
+  return default_value_;
+}
+
+void QuicNegotiableUint32::ToHandshakeMessage(
+    CryptoHandshakeMessage* out) const {
+  if (negotiated_) {
+    out->SetValue(tag_, negotiated_value_);
+  } else {
+    out->SetValue(tag_, max_value_);
+  }
+}
+
+QuicErrorCode QuicNegotiableUint32::ReadUint32(
+    const CryptoHandshakeMessage& msg,
+    uint32* out,
+    string* error_details) const {
+  DCHECK(error_details != NULL);
+  QuicErrorCode error = msg.GetUint32(tag_, out);
+  switch (error) {
+    case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
+      if (presence_ == QuicNegotiableValue::PRESENCE_REQUIRED) {
+        *error_details = "Missing " + QuicUtils::TagToString(tag_);
+        break;
+      }
+      error = QUIC_NO_ERROR;
+      *out = default_value_;
+
+    case QUIC_NO_ERROR:
+      break;
+    default:
+      *error_details = "Bad " + QuicUtils::TagToString(tag_);
+      break;
+  }
+  return error;
+}
+
+QuicErrorCode QuicNegotiableUint32::ProcessClientHello(
+    const CryptoHandshakeMessage& client_hello,
+    string* error_details) {
+  DCHECK(!negotiated_);
+  DCHECK(error_details != NULL);
+  uint32 value;
+  QuicErrorCode error = ReadUint32(client_hello, &value, error_details);
+  if (error != QUIC_NO_ERROR) {
+    return error;
+  }
+
+  negotiated_ = true;
+  negotiated_value_ = std::min(value, max_value_);
+
+  return QUIC_NO_ERROR;
+}
+
+QuicErrorCode QuicNegotiableUint32::ProcessServerHello(
+    const CryptoHandshakeMessage& server_hello,
+    string* error_details) {
+  DCHECK(!negotiated_);
+  DCHECK(error_details != NULL);
+  uint32 value;
+  QuicErrorCode error = ReadUint32(server_hello, &value, error_details);
+  if (error != QUIC_NO_ERROR) {
+    return error;
+  }
+
+  if (value > max_value_) {
+    *error_details = "Invalid value received for " +
+        QuicUtils::TagToString(tag_);
+    return QUIC_INVALID_NEGOTIATED_VALUE;
+  }
+
+  negotiated_ = true;
+  negotiated_value_ = value;
+  return QUIC_NO_ERROR;
+}
+
+QuicNegotiableTag::QuicNegotiableTag(QuicTag tag, Presence presence)
+    : QuicNegotiableValue(tag, presence) {
+}
+
+QuicNegotiableTag::~QuicNegotiableTag() {}
+
+void QuicNegotiableTag::set(const QuicTagVector& possible,
+                            QuicTag default_value) {
+  DCHECK(std::find(possible.begin(), possible.end(), default_value) !=
+            possible.end());
+  possible_values_ = possible;
+  default_value_ = default_value;
+}
+
+QuicTag QuicNegotiableTag::GetTag() const {
+  if (negotiated_) {
+    return negotiated_tag_;
+  }
+  return default_value_;
+}
+
+void QuicNegotiableTag::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
+  if (negotiated_) {
+    // Because of the way we serialize and parse handshake messages we can
+    // serialize this as value and still parse it as a vector.
+    out->SetValue(tag_, negotiated_tag_);
+  } else {
+    out->SetVector(tag_, possible_values_);
+  }
+}
+
+QuicErrorCode QuicNegotiableTag::ReadVector(
+    const CryptoHandshakeMessage& msg,
+    const QuicTag** out,
+    size_t* out_length,
+    string* error_details) const {
+  DCHECK(error_details != NULL);
+  QuicErrorCode error = msg.GetTaglist(tag_, out, out_length);
+  switch (error) {
+    case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
+      if (presence_ == PRESENCE_REQUIRED) {
+        *error_details = "Missing " + QuicUtils::TagToString(tag_);
+        break;
+      }
+      error = QUIC_NO_ERROR;
+      *out_length = 1;
+      *out = &default_value_;
+
+    case QUIC_NO_ERROR:
+      break;
+    default:
+      *error_details = "Bad " + QuicUtils::TagToString(tag_);
+      break;
+  }
+  return error;
+}
+
+QuicErrorCode QuicNegotiableTag::ProcessClientHello(
+    const CryptoHandshakeMessage& client_hello,
+    string* error_details) {
+  DCHECK(!negotiated_);
+  DCHECK(error_details != NULL);
+  const QuicTag* received_tags;
+  size_t received_tags_length;
+  QuicErrorCode error = ReadVector(client_hello, &received_tags,
+                                   &received_tags_length, error_details);
+  if (error != QUIC_NO_ERROR) {
+    return error;
+  }
+
+  QuicTag negotiated_tag;
+  if (!QuicUtils::FindMutualTag(possible_values_,
+                                received_tags,
+                                received_tags_length,
+                                QuicUtils::LOCAL_PRIORITY,
+                                &negotiated_tag,
+                                NULL)) {
+    *error_details = "Unsuported " + QuicUtils::TagToString(tag_);
+    return QUIC_CRYPTO_MESSAGE_PARAMETER_NO_OVERLAP;
+  }
+
+  negotiated_ = true;
+  negotiated_tag_ = negotiated_tag;
+  return QUIC_NO_ERROR;
+}
+
+QuicErrorCode QuicNegotiableTag::ProcessServerHello(
+    const CryptoHandshakeMessage& server_hello,
+    string* error_details) {
+  DCHECK(!negotiated_);
+  DCHECK(error_details != NULL);
+  const QuicTag* received_tags;
+  size_t received_tags_length;
+  QuicErrorCode error = ReadVector(server_hello, &received_tags,
+                                   &received_tags_length, error_details);
+  if (error != QUIC_NO_ERROR) {
+    return error;
+  }
+
+  if (received_tags_length != 1 ||
+      std::find(possible_values_.begin(), possible_values_.end(),
+                *received_tags) == possible_values_.end()) {
+    *error_details = "Invalid " + QuicUtils::TagToString(tag_);
+    return QUIC_INVALID_NEGOTIATED_VALUE;
+  }
+
+  negotiated_ = true;
+  negotiated_tag_ = *received_tags;
+  return QUIC_NO_ERROR;
+}
+
+QuicConfig::QuicConfig() :
+    congestion_control_(kCGST, QuicNegotiableValue::PRESENCE_REQUIRED),
+    idle_connection_state_lifetime_seconds_(
+        kICSL, QuicNegotiableValue::PRESENCE_REQUIRED),
+    keepalive_timeout_seconds_(kKATO, QuicNegotiableValue::PRESENCE_OPTIONAL),
+    max_streams_per_connection_(kMSPC, QuicNegotiableValue::PRESENCE_REQUIRED),
+    max_time_before_crypto_handshake_(QuicTime::Delta::Zero()) {
+  idle_connection_state_lifetime_seconds_.set(0, 0);
+  keepalive_timeout_seconds_.set(0, 0);
+}
+
+QuicConfig::~QuicConfig() {}
+
+void QuicConfig::set_congestion_control(
+    const QuicTagVector& congestion_control,
+    QuicTag default_congestion_control) {
+  congestion_control_.set(congestion_control, default_congestion_control);
+}
+
+QuicTag QuicConfig::congestion_control() const {
+  return congestion_control_.GetTag();
+}
+
+void QuicConfig::set_idle_connection_state_lifetime(
+    QuicTime::Delta max_idle_connection_state_lifetime,
+    QuicTime::Delta default_idle_conection_state_lifetime) {
+  idle_connection_state_lifetime_seconds_.set(
+      max_idle_connection_state_lifetime.ToSeconds(),
+      default_idle_conection_state_lifetime.ToSeconds());
+}
+
+QuicTime::Delta QuicConfig::idle_connection_state_lifetime() const {
+  return QuicTime::Delta::FromSeconds(
+      idle_connection_state_lifetime_seconds_.GetUint32());
+}
+
+QuicTime::Delta QuicConfig::keepalive_timeout() const {
+  return QuicTime::Delta::FromSeconds(
+      keepalive_timeout_seconds_.GetUint32());
+}
+
+void QuicConfig::set_max_streams_per_connection(size_t max_streams,
+                                                size_t default_streams) {
+  max_streams_per_connection_.set(max_streams, default_streams);
+}
+
+uint32 QuicConfig::max_streams_per_connection() const {
+  return max_streams_per_connection_.GetUint32();
+}
+
+void QuicConfig::set_max_time_before_crypto_handshake(
+    QuicTime::Delta max_time_before_crypto_handshake) {
+  max_time_before_crypto_handshake_ = max_time_before_crypto_handshake;
+}
+
+QuicTime::Delta QuicConfig::max_time_before_crypto_handshake() const {
+  return max_time_before_crypto_handshake_;
+}
+
+bool QuicConfig::negotiated() {
+  return congestion_control_.negotiated() &&
+      idle_connection_state_lifetime_seconds_.negotiated() &&
+      keepalive_timeout_seconds_.negotiated() &&
+      max_streams_per_connection_.negotiated();
+}
+
+void QuicConfig::SetDefaults() {
+  congestion_control_.set(QuicTagVector(1, kQBIC), kQBIC);
+  idle_connection_state_lifetime_seconds_.set(kDefaultTimeoutSecs,
+                                              kDefaultInitialTimeoutSecs);
+  // kKATO is optional. Return 0 if not negotiated.
+  keepalive_timeout_seconds_.set(0, 0);
+  max_streams_per_connection_.set(kDefaultMaxStreamsPerConnection,
+                                  kDefaultMaxStreamsPerConnection);
+  max_time_before_crypto_handshake_ = QuicTime::Delta::FromSeconds(
+      kDefaultMaxTimeForCryptoHandshakeSecs);
+}
+
+void QuicConfig::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
+  congestion_control_.ToHandshakeMessage(out);
+  idle_connection_state_lifetime_seconds_.ToHandshakeMessage(out);
+  keepalive_timeout_seconds_.ToHandshakeMessage(out);
+  max_streams_per_connection_.ToHandshakeMessage(out);
+}
+
+QuicErrorCode QuicConfig::ProcessClientHello(
+    const CryptoHandshakeMessage& client_hello,
+    string* error_details) {
+  DCHECK(error_details != NULL);
+
+  QuicErrorCode error = QUIC_NO_ERROR;
+  if (error == QUIC_NO_ERROR) {
+    error = congestion_control_.ProcessClientHello(client_hello, error_details);
+  }
+  if (error == QUIC_NO_ERROR) {
+    error = idle_connection_state_lifetime_seconds_.ProcessClientHello(
+        client_hello, error_details);
+  }
+  if (error == QUIC_NO_ERROR) {
+    error = keepalive_timeout_seconds_.ProcessClientHello(
+        client_hello, error_details);
+  }
+  if (error == QUIC_NO_ERROR) {
+    error = max_streams_per_connection_.ProcessClientHello(
+        client_hello, error_details);
+  }
+  return error;
+}
+
+QuicErrorCode QuicConfig::ProcessServerHello(
+    const CryptoHandshakeMessage& server_hello,
+    string* error_details) {
+  DCHECK(error_details != NULL);
+
+  QuicErrorCode error = QUIC_NO_ERROR;
+  if (error == QUIC_NO_ERROR) {
+    error = congestion_control_.ProcessServerHello(server_hello, error_details);
+  }
+  if (error == QUIC_NO_ERROR) {
+    error = idle_connection_state_lifetime_seconds_.ProcessServerHello(
+        server_hello, error_details);
+  }
+  if (error == QUIC_NO_ERROR) {
+    error = keepalive_timeout_seconds_.ProcessServerHello(
+        server_hello, error_details);
+  }
+  if (error == QUIC_NO_ERROR) {
+    error = max_streams_per_connection_.ProcessServerHello(
+        server_hello, error_details);
+  }
+  return error;
+}
+
+}  // namespace net
+