media/mtransport/transportlayerloopback.cpp@97036ab72558 (annotated)
media/mtransport/transportlayerloopback.cpp
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 | #include "logging.h" |
| michael@0 | 10 | #include "nspr.h" |
| michael@0 | 11 | #include "prlock.h" |
| michael@0 | 12 | |
| michael@0 | 13 | #include "nsNetCID.h" |
| michael@0 | 14 | #include "nsIComponentManager.h" |
| michael@0 | 15 | #include "nsComponentManagerUtils.h" |
| michael@0 | 16 | #include "nsIComponentRegistrar.h" |
| michael@0 | 17 | #include "nsIEventTarget.h" |
| michael@0 | 18 | #include "nsIIOService.h" |
| michael@0 | 19 | #include "nsIServiceManager.h" |
| michael@0 | 20 | #include "nsISocketTransportService.h" |
| michael@0 | 21 | #include "nsServiceManagerUtils.h" |
| michael@0 | 22 | |
| michael@0 | 23 | #include "transportflow.h" |
| michael@0 | 24 | #include "transportlayerloopback.h" |
| michael@0 | 25 | |
| michael@0 | 26 | namespace mozilla { |
| michael@0 | 27 | |
| michael@0 | 28 | MOZ_MTLOG_MODULE("mtransport") |
| michael@0 | 29 | |
| michael@0 | 30 | nsresult TransportLayerLoopback::Init() { |
| michael@0 | 31 | timer_ = do_CreateInstance(NS_TIMER_CONTRACTID); |
| michael@0 | 32 | MOZ_ASSERT(timer_); |
| michael@0 | 33 | if (!timer_) |
| michael@0 | 34 | return NS_ERROR_FAILURE; |
| michael@0 | 35 | |
| michael@0 | 36 | nsresult rv; |
| michael@0 | 37 | target_ = do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID, &rv); |
| michael@0 | 38 | MOZ_ASSERT(NS_SUCCEEDED(rv)); |
| michael@0 | 39 | if (!NS_SUCCEEDED(rv)) |
| michael@0 | 40 | return rv; |
| michael@0 | 41 | |
| michael@0 | 42 | timer_->SetTarget(target_); |
| michael@0 | 43 | |
| michael@0 | 44 | packets_lock_ = PR_NewLock(); |
| michael@0 | 45 | MOZ_ASSERT(packets_lock_); |
| michael@0 | 46 | if (!packets_lock_) |
| michael@0 | 47 | return NS_ERROR_FAILURE; |
| michael@0 | 48 | |
| michael@0 | 49 | deliverer_ = new Deliverer(this); |
| michael@0 | 50 | |
| michael@0 | 51 | timer_->InitWithCallback(deliverer_, 100, nsITimer::TYPE_REPEATING_SLACK); |
| michael@0 | 52 | |
| michael@0 | 53 | return NS_OK; |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | // Connect to the other side |
| michael@0 | 57 | void TransportLayerLoopback::Connect(TransportLayerLoopback* peer) { |
| michael@0 | 58 | peer_ = peer; |
| michael@0 | 59 | |
| michael@0 | 60 | TL_SET_STATE(TS_OPEN); |
| michael@0 | 61 | } |
| michael@0 | 62 | |
| michael@0 | 63 | TransportResult |
| michael@0 | 64 | TransportLayerLoopback::SendPacket(const unsigned char *data, size_t len) { |
| michael@0 | 65 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "SendPacket(" << len << ")"); |
| michael@0 | 66 | |
| michael@0 | 67 | if (!peer_) { |
| michael@0 | 68 | MOZ_MTLOG(ML_ERROR, "Discarding packet because peer not attached"); |
| michael@0 | 69 | return TE_ERROR; |
| michael@0 | 70 | } |
| michael@0 | 71 | |
| michael@0 | 72 | nsresult res = peer_->QueuePacket(data, len); |
| michael@0 | 73 | if (!NS_SUCCEEDED(res)) |
| michael@0 | 74 | return TE_ERROR; |
| michael@0 | 75 | |
| michael@0 | 76 | return static_cast<TransportResult>(len); |
| michael@0 | 77 | } |
| michael@0 | 78 | |
| michael@0 | 79 | nsresult TransportLayerLoopback::QueuePacket(const unsigned char *data, |
| michael@0 | 80 | size_t len) { |
| michael@0 | 81 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << " Enqueuing packet of length " << len); |
| michael@0 | 82 | MOZ_ASSERT(packets_lock_); |
| michael@0 | 83 | |
| michael@0 | 84 | PR_Lock(packets_lock_); |
| michael@0 | 85 | |
| michael@0 | 86 | packets_.push(new QueuedPacket()); |
| michael@0 | 87 | packets_.back()->Assign(data, len); |
| michael@0 | 88 | |
| michael@0 | 89 | PRStatus r = PR_Unlock(packets_lock_); |
| michael@0 | 90 | MOZ_ASSERT(r == PR_SUCCESS); |
| michael@0 | 91 | if (r != PR_SUCCESS) |
| michael@0 | 92 | return NS_ERROR_FAILURE; |
| michael@0 | 93 | |
| michael@0 | 94 | return NS_OK; |
| michael@0 | 95 | } |
| michael@0 | 96 | |
| michael@0 | 97 | |
| michael@0 | 98 | void TransportLayerLoopback::DeliverPackets() { |
| michael@0 | 99 | while (!packets_.empty()) { |
| michael@0 | 100 | QueuedPacket *packet = packets_.front(); |
| michael@0 | 101 | packets_.pop(); |
| michael@0 | 102 | |
| michael@0 | 103 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << " Delivering packet of length " << |
| michael@0 | 104 | packet->len()); |
| michael@0 | 105 | SignalPacketReceived(this, packet->data(), packet->len()); |
| michael@0 | 106 | |
| michael@0 | 107 | delete packet; |
| michael@0 | 108 | } |
| michael@0 | 109 | } |
| michael@0 | 110 | |
| michael@0 | 111 | NS_IMPL_ISUPPORTS(TransportLayerLoopback::Deliverer, nsITimerCallback) |
| michael@0 | 112 | |
| michael@0 | 113 | NS_IMETHODIMP TransportLayerLoopback::Deliverer::Notify(nsITimer *timer) { |
| michael@0 | 114 | if (!layer_) |
| michael@0 | 115 | return NS_OK; |
| michael@0 | 116 | |
| michael@0 | 117 | layer_->DeliverPackets(); |
| michael@0 | 118 | |
| michael@0 | 119 | return NS_OK; |
| michael@0 | 120 | } |
| michael@0 | 121 | } // close namespace |
