122 lines
4.2 KiB
C++
122 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_net_ASpdySession_h
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#define mozilla_net_ASpdySession_h
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#include "nsAHttpTransaction.h"
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#include "prinrval.h"
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#include "nsString.h"
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class nsISocketTransport;
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namespace mozilla { namespace net {
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class ASpdySession : public nsAHttpTransaction
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{
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public:
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ASpdySession();
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virtual ~ASpdySession();
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virtual bool AddStream(nsAHttpTransaction *, int32_t,
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bool, nsIInterfaceRequestor *) = 0;
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virtual bool CanReuse() = 0;
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virtual bool RoomForMoreStreams() = 0;
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virtual PRIntervalTime IdleTime() = 0;
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virtual uint32_t ReadTimeoutTick(PRIntervalTime now) = 0;
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virtual void DontReuse() = 0;
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static ASpdySession *NewSpdySession(uint32_t version, nsISocketTransport *);
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// MaybeReTunnel() is called by the connection manager when it cannot
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// dispatch a tunneled transaction. That might be because the tunnels it
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// expects to see are dead (and we may or may not be able to make more),
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// or it might just need to wait longer for one of them to become free.
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//
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// return true if the session takes back ownership of the transaction from
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// the connection manager.
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virtual bool MaybeReTunnel(nsAHttpTransaction *) = 0;
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virtual void PrintDiagnostics (nsCString &log) = 0;
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bool ResponseTimeoutEnabled() const override final {
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return true;
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}
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virtual void SendPing() = 0;
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const static uint32_t kSendingChunkSize = 4095;
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const static uint32_t kTCPSendBufferSize = 131072;
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// This is roughly the amount of data a suspended channel will have to
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// buffer before h2 flow control kicks in.
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const static uint32_t kInitialRwin = 12 * 1024 * 1024; // 12MB
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const static uint32_t kDefaultMaxConcurrent = 100;
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// soft errors are errors that terminate a stream without terminating the
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// connection. In general non-network errors are stream errors as well
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// as network specific items like cancels.
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bool SoftStreamError(nsresult code)
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{
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if (NS_SUCCEEDED(code) || code == NS_BASE_STREAM_WOULD_BLOCK) {
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return false;
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}
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// this could go either way, but because there are network instances of
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// it being a hard error we should consider it hard.
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if (code == NS_ERROR_FAILURE) {
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return false;
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}
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if (NS_ERROR_GET_MODULE(code) != NS_ERROR_MODULE_NETWORK) {
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return true;
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}
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// these are network specific soft errors
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return (code == NS_BASE_STREAM_CLOSED || code == NS_BINDING_FAILED ||
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code == NS_BINDING_ABORTED || code == NS_BINDING_REDIRECTED ||
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code == NS_ERROR_INVALID_CONTENT_ENCODING ||
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code == NS_BINDING_RETARGETED || code == NS_ERROR_CORRUPTED_CONTENT);
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}
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};
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typedef bool (*ALPNCallback) (nsISupports *); // nsISSLSocketControl is typical
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// this is essentially a single instantiation as a member of nsHttpHandler.
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// It could be all static except using static ctors of XPCOM objects is a
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// bad idea.
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class SpdyInformation
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{
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public:
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SpdyInformation();
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~SpdyInformation() {}
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static const uint32_t kCount = 2;
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// determine the index (0..kCount-1) of the spdy information that
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// correlates to the npn string. NS_FAILED() if no match is found.
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nsresult GetNPNIndex(const nsACString &npnString, uint32_t *result) const;
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// determine if a version of the protocol is enabled for index < kCount
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bool ProtocolEnabled(uint32_t index) const;
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uint8_t Version[kCount]; // telemetry enum e.g. SPDY_VERSION_31
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nsCString VersionString[kCount]; // npn string e.g. "spdy/3.1"
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// the ALPNCallback function allows the protocol stack to decide whether or
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// not to offer a particular protocol based on the known TLS information
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// that we will offer in the client hello (such as version). There has
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// not been a Server Hello received yet, so not much else can be considered.
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// Stacks without restrictions can just use SpdySessionTrue()
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ALPNCallback ALPNCallbacks[kCount];
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};
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} // namespace net
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} // namespace mozilla
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#endif // mozilla_net_ASpdySession_h
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