f9937d7f8a
Excluded llareslistener, as that appears to only be present for unit-testing Excluded new SSL methods because, well, they don't work right reliably in v2 for me
382 lines
8.4 KiB
C++
382 lines
8.4 KiB
C++
/**
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* @file llxfer.cpp
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* @brief implementation of LLXfer class for a single xfer.
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include "llxfer.h"
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#include "lluuid.h"
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#include "llerror.h"
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#include "llmath.h"
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#include "u64.h"
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//number of bytes sent in each message
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const U32 LL_XFER_CHUNK_SIZE = 1000;
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const U32 LLXfer::XFER_FILE = 1;
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const U32 LLXfer::XFER_VFILE = 2;
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const U32 LLXfer::XFER_MEM = 3;
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///////////////////////////////////////////////////////////
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LLXfer::LLXfer (S32 chunk_size)
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{
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init(chunk_size);
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}
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///////////////////////////////////////////////////////////
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LLXfer::~LLXfer ()
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{
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cleanup();
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}
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///////////////////////////////////////////////////////////
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void LLXfer::init (S32 chunk_size)
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{
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mID = 0;
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mPacketNum = -1; // there's a preincrement before sending the zeroth packet
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mXferSize = 0;
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mStatus = e_LL_XFER_UNINITIALIZED;
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mNext = NULL;
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mWaitingForACK = FALSE;
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mCallback = NULL;
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mCallbackDataHandle = NULL;
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mCallbackResult = 0;
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mBufferContainsEOF = FALSE;
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mBuffer = NULL;
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mBufferLength = 0;
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mBufferStartOffset = 0;
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mRetries = 0;
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if (chunk_size < 1)
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{
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chunk_size = LL_XFER_CHUNK_SIZE;
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}
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mChunkSize = chunk_size;
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}
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///////////////////////////////////////////////////////////
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void LLXfer::cleanup ()
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{
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if (mBuffer)
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{
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delete[] mBuffer;
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mBuffer = NULL;
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}
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}
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///////////////////////////////////////////////////////////
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S32 LLXfer::startSend (U64 xfer_id, const LLHost &remote_host)
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{
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llwarns << "undifferentiated LLXfer::startSend for " << getFileName() << llendl;
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return (-1);
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}
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///////////////////////////////////////////////////////////
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void LLXfer::setXferSize (S32 xfer_size)
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{
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mXferSize = xfer_size;
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// cout << "starting transfer of size: " << xfer_size << endl;
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}
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///////////////////////////////////////////////////////////
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S32 LLXfer::startDownload()
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{
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llwarns << "undifferentiated LLXfer::startDownload for " << getFileName()
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<< llendl;
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return (-1);
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}
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///////////////////////////////////////////////////////////
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S32 LLXfer::receiveData (char *datap, S32 data_size)
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{
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S32 retval = 0;
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if (((S32) mBufferLength + data_size) > getMaxBufferSize())
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{
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retval = flush();
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}
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if (!retval)
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{
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if (datap != NULL)
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{
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memcpy(&mBuffer[mBufferLength],datap,data_size); /*Flawfinder: ignore*/
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mBufferLength += data_size;
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}
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else
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{
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llerrs << "NULL data passed in receiveData" << llendl;
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}
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}
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return (retval);
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}
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///////////////////////////////////////////////////////////
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S32 LLXfer::flush()
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{
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// only files have somewhere to flush to
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// if we get called with a flush it means we've blown past our
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// allocated buffer size
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return (-1);
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}
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///////////////////////////////////////////////////////////
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S32 LLXfer::suck(S32 start_position)
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{
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llwarns << "Attempted to send a packet outside the buffer bounds in LLXfer::suck()" << llendl;
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return (-1);
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}
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///////////////////////////////////////////////////////////
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void LLXfer::sendPacket(S32 packet_num)
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{
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char fdata_buf[LL_XFER_LARGE_PAYLOAD+4]; /* Flawfinder: ignore */
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S32 fdata_size = mChunkSize;
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BOOL last_packet = FALSE;
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S32 num_copy = 0;
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// if the desired packet is not in our current buffered excerpt from the file. . .
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if (((U32)packet_num*fdata_size < mBufferStartOffset)
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|| ((U32)llmin((U32)mXferSize,(U32)((U32)(packet_num+1)*fdata_size)) > mBufferStartOffset + mBufferLength))
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{
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if (suck(packet_num*fdata_size)) // returns non-zero on failure
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{
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abort(LL_ERR_EOF);
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return;
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}
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}
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S32 desired_read_position = 0;
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desired_read_position = packet_num * fdata_size - mBufferStartOffset;
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fdata_size = llmin((S32)mBufferLength-desired_read_position, mChunkSize);
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if (fdata_size < 0)
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{
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llwarns << "negative data size in xfer send, aborting" << llendl;
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abort(LL_ERR_EOF);
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return;
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}
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if (((U32)(desired_read_position + fdata_size) >= (U32)mBufferLength) && (mBufferContainsEOF))
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{
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last_packet = TRUE;
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}
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if (packet_num)
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{
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num_copy = llmin(fdata_size, (S32)sizeof(fdata_buf));
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num_copy = llmin(num_copy, (S32)(mBufferLength - desired_read_position));
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if (num_copy > 0)
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{
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memcpy(fdata_buf,&mBuffer[desired_read_position],num_copy); /*Flawfinder: ignore*/
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}
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}
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else
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{
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// if we're the first packet, encode size as an additional S32
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// at start of data.
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num_copy = llmin(fdata_size, (S32)(sizeof(fdata_buf)-sizeof(S32)));
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num_copy = llmin(
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num_copy,
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(S32)(mBufferLength - desired_read_position));
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if (num_copy > 0)
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{
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memcpy( /*Flawfinder: ignore*/
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fdata_buf + sizeof(S32),
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&mBuffer[desired_read_position],
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num_copy);
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}
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fdata_size += sizeof(S32);
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htonmemcpy(fdata_buf,&mXferSize, MVT_S32, sizeof(S32));
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}
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S32 encoded_packetnum = encodePacketNum(packet_num,last_packet);
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if (fdata_size)
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{
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// send the packet
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gMessageSystem->newMessageFast(_PREHASH_SendXferPacket);
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gMessageSystem->nextBlockFast(_PREHASH_XferID);
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gMessageSystem->addU64Fast(_PREHASH_ID, mID);
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gMessageSystem->addU32Fast(_PREHASH_Packet, encoded_packetnum);
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gMessageSystem->nextBlockFast(_PREHASH_DataPacket);
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gMessageSystem->addBinaryDataFast(_PREHASH_Data, &fdata_buf,fdata_size);
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gMessageSystem->sendMessage(mRemoteHost);
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ACKTimer.reset();
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mWaitingForACK = TRUE;
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}
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if (last_packet)
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{
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mStatus = e_LL_XFER_COMPLETE;
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}
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else
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{
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mStatus = e_LL_XFER_IN_PROGRESS;
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}
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}
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///////////////////////////////////////////////////////////
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void LLXfer::sendNextPacket()
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{
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mRetries = 0;
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sendPacket(++mPacketNum);
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}
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///////////////////////////////////////////////////////////
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void LLXfer::resendLastPacket()
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{
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mRetries++;
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sendPacket(mPacketNum);
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}
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///////////////////////////////////////////////////////////
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S32 LLXfer::processEOF()
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{
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S32 retval = 0;
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mStatus = e_LL_XFER_COMPLETE;
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if (LL_ERR_NOERR == mCallbackResult)
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{
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llinfos << "xfer from " << mRemoteHost << " complete: " << getFileName()
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<< llendl;
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}
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else
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{
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llinfos << "xfer from " << mRemoteHost << " failed, code "
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<< mCallbackResult << ": " << getFileName() << llendl;
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}
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if (mCallback)
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{
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mCallback(mCallbackDataHandle,mCallbackResult,LL_EXSTAT_NONE);
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}
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return(retval);
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}
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///////////////////////////////////////////////////////////
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S32 LLXfer::encodePacketNum(S32 packet_num, BOOL is_EOF)
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{
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if (is_EOF)
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{
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packet_num |= 0x80000000;
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}
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return packet_num;
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}
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///////////////////////////////////////////////////////////
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void LLXfer::abort (S32 result_code)
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{
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mCallbackResult = result_code;
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llinfos << "Aborting xfer from " << mRemoteHost << " named " << getFileName()
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<< " - error: " << result_code << llendl;
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gMessageSystem->newMessageFast(_PREHASH_AbortXfer);
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gMessageSystem->nextBlockFast(_PREHASH_XferID);
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gMessageSystem->addU64Fast(_PREHASH_ID, mID);
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gMessageSystem->addS32Fast(_PREHASH_Result, result_code);
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gMessageSystem->sendMessage(mRemoteHost);
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mStatus = e_LL_XFER_ABORTED;
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}
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///////////////////////////////////////////////////////////
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std::string LLXfer::getFileName()
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{
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return U64_to_str(mID);
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}
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///////////////////////////////////////////////////////////
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U32 LLXfer::getXferTypeTag()
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{
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return 0;
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}
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///////////////////////////////////////////////////////////
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S32 LLXfer::getMaxBufferSize ()
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{
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return(mXferSize);
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}
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std::ostream& operator<< (std::ostream& os, LLXfer &hh)
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{
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os << hh.getFileName() ;
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return os;
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}
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