media/mtransport/transportlayerprsock.cpp@97036ab72558 (annotated)
media/mtransport/transportlayerprsock.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 "prerror.h" |
| michael@0 | 12 | #include "prio.h" |
| michael@0 | 13 | |
| michael@0 | 14 | #include "nsCOMPtr.h" |
| michael@0 | 15 | #include "nsASocketHandler.h" |
| michael@0 | 16 | #include "nsISocketTransportService.h" |
| michael@0 | 17 | #include "nsNetCID.h" |
| michael@0 | 18 | #include "nsServiceManagerUtils.h" |
| michael@0 | 19 | #include "nsXPCOM.h" |
| michael@0 | 20 | |
| michael@0 | 21 | #include "transportflow.h" |
| michael@0 | 22 | #include "transportlayerprsock.h" |
| michael@0 | 23 | |
| michael@0 | 24 | namespace mozilla { |
| michael@0 | 25 | |
| michael@0 | 26 | MOZ_MTLOG_MODULE("mtransport") |
| michael@0 | 27 | |
| michael@0 | 28 | nsresult TransportLayerPrsock::InitInternal() { |
| michael@0 | 29 | // Get the transport service as a transport service |
| michael@0 | 30 | nsresult rv; |
| michael@0 | 31 | stservice_ = do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID, &rv); |
| michael@0 | 32 | |
| michael@0 | 33 | if (!NS_SUCCEEDED(rv)) { |
| michael@0 | 34 | MOZ_MTLOG(ML_ERROR, "Couldn't get socket transport service"); |
| michael@0 | 35 | return rv; |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | return NS_OK; |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | void TransportLayerPrsock::Import(PRFileDesc *fd, nsresult *result) { |
| michael@0 | 42 | if (state_ != TS_INIT) { |
| michael@0 | 43 | *result = NS_ERROR_NOT_INITIALIZED; |
| michael@0 | 44 | return; |
| michael@0 | 45 | } |
| michael@0 | 46 | |
| michael@0 | 47 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Importing()"); |
| michael@0 | 48 | fd_ = fd; |
| michael@0 | 49 | handler_ = new SocketHandler(this, fd); |
| michael@0 | 50 | |
| michael@0 | 51 | nsresult rv = stservice_->AttachSocket(fd_, handler_); |
| michael@0 | 52 | if (!NS_SUCCEEDED(rv)) { |
| michael@0 | 53 | *result = rv; |
| michael@0 | 54 | return; |
| michael@0 | 55 | } |
| michael@0 | 56 | |
| michael@0 | 57 | TL_SET_STATE(TS_OPEN); |
| michael@0 | 58 | |
| michael@0 | 59 | *result = NS_OK; |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | int TransportLayerPrsock::SendPacket(const unsigned char *data, size_t len) { |
| michael@0 | 63 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "SendPacket(" << len << ")"); |
| michael@0 | 64 | if (state_ != TS_OPEN) { |
| michael@0 | 65 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Can't send packet on closed interface"); |
| michael@0 | 66 | return TE_INTERNAL; |
| michael@0 | 67 | } |
| michael@0 | 68 | |
| michael@0 | 69 | int32_t status; |
| michael@0 | 70 | status = PR_Write(fd_, data, len); |
| michael@0 | 71 | if (status >= 0) { |
| michael@0 | 72 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Wrote " << len << " bytes"); |
| michael@0 | 73 | return status; |
| michael@0 | 74 | } |
| michael@0 | 75 | |
| michael@0 | 76 | PRErrorCode err = PR_GetError(); |
| michael@0 | 77 | if (err == PR_WOULD_BLOCK_ERROR) { |
| michael@0 | 78 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Write blocked"); |
| michael@0 | 79 | return TE_WOULDBLOCK; |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | |
| michael@0 | 83 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Write error; channel closed"); |
| michael@0 | 84 | TL_SET_STATE(TS_ERROR); |
| michael@0 | 85 | return TE_ERROR; |
| michael@0 | 86 | } |
| michael@0 | 87 | |
| michael@0 | 88 | void TransportLayerPrsock::OnSocketReady(PRFileDesc *fd, int16_t outflags) { |
| michael@0 | 89 | if (!(outflags & PR_POLL_READ)) { |
| michael@0 | 90 | return; |
| michael@0 | 91 | } |
| michael@0 | 92 | |
| michael@0 | 93 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "OnSocketReady(flags=" << outflags << ")"); |
| michael@0 | 94 | |
| michael@0 | 95 | unsigned char buf[1600]; |
| michael@0 | 96 | int32_t rv = PR_Read(fd, buf, sizeof(buf)); |
| michael@0 | 97 | |
| michael@0 | 98 | if (rv > 0) { |
| michael@0 | 99 | // Successful read |
| michael@0 | 100 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Read " << rv << " bytes"); |
| michael@0 | 101 | SignalPacketReceived(this, buf, rv); |
| michael@0 | 102 | } else if (rv == 0) { |
| michael@0 | 103 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Read 0 bytes; channel closed"); |
| michael@0 | 104 | TL_SET_STATE(TS_CLOSED); |
| michael@0 | 105 | } else { |
| michael@0 | 106 | PRErrorCode err = PR_GetError(); |
| michael@0 | 107 | |
| michael@0 | 108 | if (err != PR_WOULD_BLOCK_ERROR) { |
| michael@0 | 109 | MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Read error; channel closed"); |
| michael@0 | 110 | TL_SET_STATE(TS_ERROR); |
| michael@0 | 111 | } |
| michael@0 | 112 | } |
| michael@0 | 113 | } |
| michael@0 | 114 | |
| michael@0 | 115 | NS_IMPL_ISUPPORTS0(TransportLayerPrsock::SocketHandler) |
| michael@0 | 116 | } // close namespace |
