media/mtransport/transportlayerloopback.h@97036ab72558 (annotated)
media/mtransport/transportlayerloopback.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 5 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | // Original author: ekr@rtfm.com |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef transportlayerloopback_h__ |
| michael@0 | 10 | #define transportlayerloopback_h__ |
| michael@0 | 11 | |
| michael@0 | 12 | #include "nspr.h" |
| michael@0 | 13 | #include "prio.h" |
| michael@0 | 14 | #include "prlock.h" |
| michael@0 | 15 | |
| michael@0 | 16 | #include <memory> |
| michael@0 | 17 | #include <queue> |
| michael@0 | 18 | |
| michael@0 | 19 | |
| michael@0 | 20 | #include "nsAutoPtr.h" |
| michael@0 | 21 | #include "nsCOMPtr.h" |
| michael@0 | 22 | #include "nsITimer.h" |
| michael@0 | 23 | |
| michael@0 | 24 | |
| michael@0 | 25 | #include "m_cpp_utils.h" |
| michael@0 | 26 | #include "transportflow.h" |
| michael@0 | 27 | #include "transportlayer.h" |
| michael@0 | 28 | |
| michael@0 | 29 | // A simple loopback transport layer that is used for testing. |
| michael@0 | 30 | namespace mozilla { |
| michael@0 | 31 | |
| michael@0 | 32 | class TransportLayerLoopback : public TransportLayer { |
| michael@0 | 33 | public: |
| michael@0 | 34 | TransportLayerLoopback() : |
| michael@0 | 35 | peer_(nullptr), |
| michael@0 | 36 | timer_(nullptr), |
| michael@0 | 37 | packets_(), |
| michael@0 | 38 | packets_lock_(nullptr), |
| michael@0 | 39 | deliverer_(nullptr) {} |
| michael@0 | 40 | |
| michael@0 | 41 | ~TransportLayerLoopback() { |
| michael@0 | 42 | while (!packets_.empty()) { |
| michael@0 | 43 | QueuedPacket *packet = packets_.front(); |
| michael@0 | 44 | packets_.pop(); |
| michael@0 | 45 | delete packet; |
| michael@0 | 46 | } |
| michael@0 | 47 | if (packets_lock_) { |
| michael@0 | 48 | PR_DestroyLock(packets_lock_); |
| michael@0 | 49 | } |
| michael@0 | 50 | timer_->Cancel(); |
| michael@0 | 51 | deliverer_->Detach(); |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | // Init |
| michael@0 | 55 | nsresult Init(); |
| michael@0 | 56 | |
| michael@0 | 57 | // Connect to the other side |
| michael@0 | 58 | void Connect(TransportLayerLoopback* peer); |
| michael@0 | 59 | |
| michael@0 | 60 | // Disconnect |
| michael@0 | 61 | void Disconnect() { |
| michael@0 | 62 | TransportLayerLoopback *peer = peer_; |
| michael@0 | 63 | |
| michael@0 | 64 | peer_ = nullptr; |
| michael@0 | 65 | if (peer) { |
| michael@0 | 66 | peer->Disconnect(); |
| michael@0 | 67 | } |
| michael@0 | 68 | } |
| michael@0 | 69 | |
| michael@0 | 70 | // Overrides for TransportLayer |
| michael@0 | 71 | virtual TransportResult SendPacket(const unsigned char *data, size_t len); |
| michael@0 | 72 | |
| michael@0 | 73 | // Deliver queued packets |
| michael@0 | 74 | void DeliverPackets(); |
| michael@0 | 75 | |
| michael@0 | 76 | TRANSPORT_LAYER_ID("loopback") |
| michael@0 | 77 | |
| michael@0 | 78 | private: |
| michael@0 | 79 | DISALLOW_COPY_ASSIGN(TransportLayerLoopback); |
| michael@0 | 80 | |
| michael@0 | 81 | // A queued packet |
| michael@0 | 82 | class QueuedPacket { |
| michael@0 | 83 | public: |
| michael@0 | 84 | QueuedPacket() : data_(nullptr), len_(0) {} |
| michael@0 | 85 | ~QueuedPacket() { |
| michael@0 | 86 | delete [] data_; |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | void Assign(const unsigned char *data, size_t len) { |
| michael@0 | 90 | data_ = new unsigned char[len]; |
| michael@0 | 91 | memcpy(static_cast<void *>(data_), |
| michael@0 | 92 | static_cast<const void *>(data), len); |
| michael@0 | 93 | len_ = len; |
| michael@0 | 94 | } |
| michael@0 | 95 | |
| michael@0 | 96 | const unsigned char *data() const { return data_; } |
| michael@0 | 97 | size_t len() const { return len_; } |
| michael@0 | 98 | |
| michael@0 | 99 | private: |
| michael@0 | 100 | DISALLOW_COPY_ASSIGN(QueuedPacket); |
| michael@0 | 101 | |
| michael@0 | 102 | unsigned char *data_; |
| michael@0 | 103 | size_t len_; |
| michael@0 | 104 | }; |
| michael@0 | 105 | |
| michael@0 | 106 | // A timer to deliver packets if some are available |
| michael@0 | 107 | // Fires every 100 ms |
| michael@0 | 108 | class Deliverer : public nsITimerCallback { |
| michael@0 | 109 | public: |
| michael@0 | 110 | Deliverer(TransportLayerLoopback *layer) : |
| michael@0 | 111 | layer_(layer) {} |
| michael@0 | 112 | virtual ~Deliverer() { |
| michael@0 | 113 | } |
| michael@0 | 114 | void Detach() { |
| michael@0 | 115 | layer_ = nullptr; |
| michael@0 | 116 | } |
| michael@0 | 117 | |
| michael@0 | 118 | NS_DECL_THREADSAFE_ISUPPORTS |
| michael@0 | 119 | NS_DECL_NSITIMERCALLBACK |
| michael@0 | 120 | |
| michael@0 | 121 | private: |
| michael@0 | 122 | DISALLOW_COPY_ASSIGN(Deliverer); |
| michael@0 | 123 | |
| michael@0 | 124 | TransportLayerLoopback *layer_; |
| michael@0 | 125 | }; |
| michael@0 | 126 | |
| michael@0 | 127 | // Queue a packet for delivery |
| michael@0 | 128 | nsresult QueuePacket(const unsigned char *data, size_t len); |
| michael@0 | 129 | |
| michael@0 | 130 | TransportLayerLoopback* peer_; |
| michael@0 | 131 | nsCOMPtr<nsITimer> timer_; |
| michael@0 | 132 | std::queue<QueuedPacket *> packets_; |
| michael@0 | 133 | PRLock *packets_lock_; |
| michael@0 | 134 | nsRefPtr<Deliverer> deliverer_; |
| michael@0 | 135 | }; |
| michael@0 | 136 | |
| michael@0 | 137 | } // close namespace |
| michael@0 | 138 | #endif |
