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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef mozilla_net_ASpdySession_h
#define mozilla_net_ASpdySession_h
#include "nsAHttpTransaction.h"
#include "prinrval.h"
#include "nsString.h"
class nsISocketTransport;
namespace mozilla { namespace net {
class ASpdySession : public nsAHttpTransaction
{
public:
ASpdySession();
virtual ~ASpdySession();
virtual bool AddStream(nsAHttpTransaction *, int32_t,
bool, nsIInterfaceRequestor *) = 0;
virtual bool CanReuse() = 0;
virtual bool RoomForMoreStreams() = 0;
virtual PRIntervalTime IdleTime() = 0;
virtual uint32_t ReadTimeoutTick(PRIntervalTime now) = 0;
virtual void DontReuse() = 0;
virtual uint32_t SpdyVersion() = 0;
static ASpdySession *NewSpdySession(uint32_t version, nsISocketTransport *, bool);
// MaybeReTunnel() is called by the connection manager when it cannot
// dispatch a tunneled transaction. That might be because the tunnels it
// expects to see are dead (and we may or may not be able to make more),
// or it might just need to wait longer for one of them to become free.
//
// return true if the session takes back ownership of the transaction from
// the connection manager.
virtual bool MaybeReTunnel(nsAHttpTransaction *) = 0;
virtual void PrintDiagnostics (nsCString &log) = 0;
bool ResponseTimeoutEnabled() const override final {
return true;
}
virtual void SendPing() = 0;
const static uint32_t kSendingChunkSize = 4095;
const static uint32_t kTCPSendBufferSize = 131072;
// This is roughly the amount of data a suspended channel will have to
// buffer before h2 flow control kicks in.
const static uint32_t kInitialRwin = 12 * 1024 * 1024; // 12MB
const static uint32_t kDefaultMaxConcurrent = 100;
// soft errors are errors that terminate a stream without terminating the
// connection. In general non-network errors are stream errors as well
// as network specific items like cancels.
bool SoftStreamError(nsresult code)
{
if (NS_SUCCEEDED(code) || code == NS_BASE_STREAM_WOULD_BLOCK) {
return false;
}
// this could go either way, but because there are network instances of
// it being a hard error we should consider it hard.
if (code == NS_ERROR_FAILURE || code == NS_ERROR_OUT_OF_MEMORY) {
return false;
}
if (NS_ERROR_GET_MODULE(code) != NS_ERROR_MODULE_NETWORK) {
return true;
}
// these are network specific soft errors
return (code == NS_BASE_STREAM_CLOSED || code == NS_BINDING_FAILED ||
code == NS_BINDING_ABORTED || code == NS_BINDING_REDIRECTED ||
code == NS_ERROR_INVALID_CONTENT_ENCODING ||
code == NS_BINDING_RETARGETED || code == NS_ERROR_CORRUPTED_CONTENT);
}
};
typedef bool (*ALPNCallback) (nsISupports *); // nsISSLSocketControl is typical
// this is essentially a single instantiation as a member of nsHttpHandler.
// It could be all static except using static ctors of XPCOM objects is a
// bad idea.
class SpdyInformation
{
public:
SpdyInformation();
~SpdyInformation() {}
static const uint32_t kCount = 1;
// determine the index (0..kCount-1) of the spdy information that
// correlates to the npn string. NS_FAILED() if no match is found.
nsresult GetNPNIndex(const nsACString &npnString, uint32_t *result) const;
// determine if a version of the protocol is enabled for index < kCount
bool ProtocolEnabled(uint32_t index) const;
uint8_t Version[kCount]; // telemetry enum e.g. SPDY_VERSION_31
nsCString VersionString[kCount]; // npn string e.g. "spdy/3.1"
// the ALPNCallback function allows the protocol stack to decide whether or
// not to offer a particular protocol based on the known TLS information
// that we will offer in the client hello (such as version). There has
// not been a Server Hello received yet, so not much else can be considered.
ALPNCallback ALPNCallbacks[kCount];
};
} // namespace net
} // namespace mozilla
#endif // mozilla_net_ASpdySession_h
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