gecko/netwerk/protocol/http/ASpdySession.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// HttpLog.h should generally be included first
#include "HttpLog.h"

#include "nsHttp.h"
#include "nsHttpHandler.h"

#include "ASpdySession.h"
#include "SpdySession2.h"
#include "SpdySession3.h"

#include "mozilla/Telemetry.h"

namespace mozilla {
namespace net {

ASpdySession *
ASpdySession::NewSpdySession(uint32_t version,
                             nsAHttpTransaction *aTransaction,
                             nsISocketTransport *aTransport,
                             int32_t aPriority)
{
  // This is a necko only interface, so we can enforce version
  // requests as a precondition
  MOZ_ASSERT(version == SPDY_VERSION_2 ||
             version == SPDY_VERSION_3,
             "Unsupported spdy version");

  // Don't do a runtime check of IsSpdyV?Enabled() here because pref value
  // may have changed since starting negotiation. The selected protocol comes
  // from a list provided in the SERVER HELLO filtered by our acceptable
  // versions, so there is no risk of the server ignoring our prefs.

  Telemetry::Accumulate(Telemetry::SPDY_VERSION2, version);

  if (version == SPDY_VERSION_2)
    return new SpdySession2(aTransaction, aTransport, aPriority);

  return new SpdySession3(aTransaction, aTransport, aPriority);
}

SpdyInformation::SpdyInformation()
{
  // list the preferred version first
  Version[0] = SPDY_VERSION_3;
  VersionString[0] = NS_LITERAL_CSTRING("spdy/3");

  Version[1] = SPDY_VERSION_2;
  VersionString[1] = NS_LITERAL_CSTRING("spdy/2");
}

bool
SpdyInformation::ProtocolEnabled(uint32_t index)
{
  if (index == 0)
    return gHttpHandler->IsSpdyV3Enabled();

  if (index == 1)
    return gHttpHandler->IsSpdyV2Enabled();

  MOZ_ASSERT(false, "index out of range");
  return false;
}

nsresult
SpdyInformation::GetNPNVersionIndex(const nsACString &npnString,
                                    uint8_t *result)
{
  if (npnString.IsEmpty())
    return NS_ERROR_FAILURE;

  if (npnString.Equals(VersionString[0]))
    *result = Version[0];
  else if (npnString.Equals(VersionString[1]))
    *result = Version[1];
  else
    return NS_ERROR_FAILURE;

  return NS_OK;
}

} // namespace mozilla::net
} // namespace mozilla