int32 MultiDataIO :: Write(const void * buffer, uint32 size)
{
int64 newSeekPos = -1; // just to shut the compiler up
uint32 maxWrittenBytes = 0;
uint32 minWrittenBytes = MUSCLE_NO_LIMIT;
for (int32 i=_childIOs.GetNumItems()-1; i>=0; i--)
{
int32 childRet = _childIOs[i]()->Write(buffer, muscleMin(size, minWrittenBytes));
if (childRet < 0)
{
if ((_absorbPartialErrors)&&(_childIOs.GetNumItems() > 1)) (void) _childIOs.RemoveItemAt(i);
else return -1;
}
else
{
if ((uint32)childRet < minWrittenBytes)
{
minWrittenBytes = childRet;
newSeekPos = _childIOs[i]()->GetPosition();
}
maxWrittenBytes = muscleMax(maxWrittenBytes, (uint32)childRet);
}
}
if (minWrittenBytes < maxWrittenBytes)
{
// Oh dear, some children wrote more bytes than others. To make their seek-positions equal again,
// we are going to seek everybody to the seek-position of the child that wrote the fewest bytes.
if (SeekAll(0, newSeekPos, IO_SEEK_CUR) != B_NO_ERROR) return -1;
}
return (maxWrittenBytes > 0) ? minWrittenBytes : 0; // the conditional is there in case minWrittenBytes is still MUSCLE_NO_LIMIT
}
String UnparseArgs(const Queue<String> & args, uint32 startIdx, uint32 endIdx)
{
String ret;
endIdx = muscleMin(endIdx, args.GetNumItems());
for (uint32 i=startIdx; i<endIdx; i++)
{
String subRet = args[i];
subRet.Replace("\"", "\\\"");
if (subRet.IndexOf(' ') >= 0) subRet = subRet.Append("\"").Prepend("\"");
if (ret.HasChars()) ret += ' ';
ret += subRet;
}
return ret;
}
static void WriteOctalASCII(uint8 * b, uint64 val, uint8 fieldSize)
{
// gotta pad out the file data to the nearest block boundary!
char formatStr[16]; strcpy(formatStr, UINT64_FORMAT_SPEC" ");
char * pi = strchr(formatStr, 'u');
if (pi) *pi = 'o'; // gotta use octal here!
char tmp[256];
sprintf(tmp, formatStr, val);
int numChars = muscleMin((int)fieldSize, ((int)(strlen(tmp)+1))); // include the NUL byte if possible
uint8 * dStart = (b+fieldSize)-numChars;
memcpy(dStart, tmp, numChars);
memset(b, '0', dStart-b); // initial zeros
}
int32
PlainTextMessageIOGateway ::
DoOutputImplementation(uint32 maxBytes)
{
TCHECKPOINT;
const Message * msg = _currentSendingMessage();
if (msg == NULL)
{
// try to get the next message from our queue
(void) GetOutgoingMessageQueue().RemoveHead(_currentSendingMessage);
msg = _currentSendingMessage();
_currentSendLineIndex = _currentSendOffset = -1;
}
if (msg)
{
if ((_currentSendOffset < 0)||(_currentSendOffset >= (int32)_currentSendText.Length()))
{
// Try to get the next line of text from our message
if (msg->FindString(PR_NAME_TEXT_LINE, ++_currentSendLineIndex, _currentSendText) == B_NO_ERROR)
{
_currentSendOffset = 0;
_currentSendText += _eolString;
}
else
{
_currentSendingMessage.Reset(); // no more text available? Go to the next message then.
return DoOutputImplementation(maxBytes);
}
}
if ((msg)&&(_currentSendOffset >= 0)&&(_currentSendOffset < (int32)_currentSendText.Length()))
{
// Send as much as we can of the current text line
const char * bytes = _currentSendText.Cstr() + _currentSendOffset;
int32 bytesWritten = GetDataIO()()->Write(bytes, muscleMin(_currentSendText.Length()-_currentSendOffset, maxBytes));
if (bytesWritten < 0) return -1;
else if (bytesWritten > 0)
{
_currentSendOffset += bytesWritten;
int32 subRet = DoOutputImplementation(maxBytes-bytesWritten);
return (subRet >= 0) ? subRet+bytesWritten : -1;
}
}
}
return 0;
}
int32 PacketizedProxyDataIO :: Read(void * buffer, uint32 size)
{
int32 ret = 0;
if (_inputBufferSizeBytesRead < sizeof(uint32))
{
uint8 * ip = (uint8 *) &_inputBufferSize;
const int32 numSizeBytesRead = ProxyDataIO::Read(&ip[_inputBufferSizeBytesRead], sizeof(uint32)-_inputBufferSizeBytesRead);
if (numSizeBytesRead < 0) return -1;
_inputBufferSizeBytesRead += numSizeBytesRead;
if (_inputBufferSizeBytesRead == sizeof(uint32))
{
_inputBufferSize = B_LENDIAN_TO_HOST_INT32(_inputBufferSize);
if (_inputBufferSize > _maxTransferUnit)
{
LogTime(MUSCLE_LOG_ERROR, "PacketizedProxyDataIO: Error, incoming packet with size " UINT32_FORMAT_SPEC ", max transfer unit is set to " UINT32_FORMAT_SPEC "\n", _inputBufferSize, _maxTransferUnit);
return -1;
}
if (_inputBuffer.SetNumBytes(_inputBufferSize, false) != B_NO_ERROR) return -1;
_inputBufferBytesRead = 0;
// Special case for empty packets
if (_inputBufferSize == 0) _inputBufferSizeBytesRead = 0;
}
}
const uint32 inBufSize = _inputBuffer.GetNumBytes();
if ((_inputBufferSizeBytesRead == sizeof(uint32))&&(_inputBufferBytesRead < inBufSize))
{
const int32 numBytesRead = ProxyDataIO::Read(_inputBuffer.GetBuffer()+_inputBufferBytesRead, inBufSize-_inputBufferBytesRead);
if (numBytesRead < 0) return -1;
_inputBufferBytesRead += numBytesRead;
if (_inputBufferBytesRead == inBufSize)
{
const uint32 copyBytes = muscleMin(size, inBufSize);
if (size < inBufSize) LogTime(MUSCLE_LOG_WARNING, "PacketizedProxyDataIO: Truncating incoming packet (" UINT32_FORMAT_SPEC " bytes available, only " UINT32_FORMAT_SPEC " bytes in user buffer)\n", inBufSize, size);
memcpy(buffer, _inputBuffer.GetBuffer(), copyBytes);
ret = copyBytes;
_inputBufferSizeBytesRead = _inputBufferBytesRead = 0;
_inputBuffer.Clear(inBufSize>(64*1024)); // free up memory after a large packet recv
}
}
return ret;
}
int32
PlainTextMessageIOGateway ::
DoInputImplementation(AbstractGatewayMessageReceiver & receiver, uint32 maxBytes)
{
TCHECKPOINT;
int32 ret = 0;
const int tempBufSize = 2048;
char buf[tempBufSize];
int32 bytesRead = GetDataIO()()->Read(buf, muscleMin(maxBytes, (uint32)(sizeof(buf)-1)));
if (bytesRead < 0)
{
FlushInput(receiver);
return -1;
}
if (bytesRead > 0)
{
uint32 filteredBytesRead = bytesRead;
FilterInputBuffer(buf, filteredBytesRead, sizeof(buf)-1);
ret += filteredBytesRead;
buf[filteredBytesRead] = '\0';
MessageRef inMsg; // demand-allocated
int32 beginAt = 0;
for (uint32 i=0; i<filteredBytesRead; i++)
{
char nextChar = buf[i];
if ((nextChar == '\r')||(nextChar == '\n'))
{
buf[i] = '\0'; // terminate the string here
if ((nextChar == '\r')||(_prevCharWasCarriageReturn == false)) inMsg = AddIncomingText(inMsg, &buf[beginAt]);
beginAt = i+1;
}
_prevCharWasCarriageReturn = (nextChar == '\r');
}
if (beginAt < (int32)filteredBytesRead)
{
if (_flushPartialIncomingLines) inMsg = AddIncomingText(inMsg, &buf[beginAt]);
else _incomingText += &buf[beginAt];
}
if (inMsg()) receiver.CallMessageReceivedFromGateway(inMsg);
}
return ret;
}
String CleanupDNSLabel(const String & s, const String & optAdditionalAllowedChars)
{
const uint32 len = muscleMin(s.Length(), (uint32)63); // DNS spec says maximum 63 chars per label!
String ret; if (ret.Prealloc(len) != B_NO_ERROR) return ret;
const char * p = s();
for (uint32 i=0; i<len; i++)
{
const char c = p[i];
switch(c)
{
case '\'': case '\"': case '(': case ')': case '[': case ']': case '{': case '}':
// do nothing -- we will omit delimiters
break;
default:
if ((muscleInRange(c, '0', '9'))||(muscleInRange(c, 'A', 'Z'))||(muscleInRange(c, 'a', 'z'))||(optAdditionalAllowedChars.Contains(c))) ret += c;
else if ((ret.HasChars())&&(ret.EndsWith('-') == false)) ret += '-';
break;
}
}
while(ret.EndsWith('-')) ret -= '-'; // remove any trailing dashes
return ret;
}
int32 PacketTunnelIOGateway :: DoOutputImplementation(uint32 maxBytes)
{
if (_outputPacketBuffer.SetNumBytes(_maxTransferUnit, false) != B_NO_ERROR) return -1;
uint32 totalBytesWritten = 0;
bool firstTime = true;
while((totalBytesWritten < maxBytes)&&((firstTime)||(IsSuggestedTimeSliceExpired() == false)))
{
firstTime = false;
// Step 1: Add as much data to our output packet buffer as we can fit into it
while((_outputPacketSize+FRAGMENT_HEADER_SIZE < _maxTransferUnit)&&(HasBytesToOutput()))
{
// Demand-create the next send-buffer
if (_currentOutputBuffer() == NULL)
{
MessageRef msg;
if (GetOutgoingMessageQueue().RemoveHead(msg) == B_NO_ERROR)
{
_currentOutputBufferOffset = 0;
_currentOutputBuffer.Reset();
if (_slaveGateway())
{
DataIORef oldIO = _slaveGateway()->GetDataIO(); // save slave gateway's old state
// Get the slave gateway to generate its output into our ByteBuffer
_fakeSendBuffer.SetNumBytes(0, false);
_fakeSendIO.Seek(0, SeekableDataIO::IO_SEEK_SET);
_slaveGateway()->SetDataIO(DataIORef(&_fakeSendIO, false));
_slaveGateway()->AddOutgoingMessage(msg);
while(_slaveGateway()->DoOutput() > 0) {/* empty */}
_slaveGateway()->SetDataIO(oldIO); // restore slave gateway's old state
_currentOutputBuffer.SetRef(&_fakeSendBuffer, false);
}
else if (_fakeSendBuffer.SetNumBytes(msg()->FlattenedSize(), false) == B_NO_ERROR)
{
// Default algorithm: Just flatten the Message into the buffer
msg()->Flatten(_fakeSendBuffer.GetBuffer());
_currentOutputBuffer.SetRef(&_fakeSendBuffer, false);
}
}
}
if (_currentOutputBuffer() == NULL) break; // oops, out of mem?
uint32 sbSize = _currentOutputBuffer()->GetNumBytes();
uint32 dataBytesToSend = muscleMin(_maxTransferUnit-(_outputPacketSize+FRAGMENT_HEADER_SIZE), sbSize-_currentOutputBufferOffset);
uint8 * p = _outputPacketBuffer.GetBuffer()+_outputPacketSize;
muscleCopyOut(&p[0*sizeof(uint32)], B_HOST_TO_LENDIAN_INT32(_magic)); // a well-known magic number, for sanity checking
muscleCopyOut(&p[1*sizeof(uint32)], B_HOST_TO_LENDIAN_INT32(_sexID)); // source exclusion ID
muscleCopyOut(&p[2*sizeof(uint32)], B_HOST_TO_LENDIAN_INT32(_sendMessageIDCounter)); // message ID tag so the receiver can track what belongs where
muscleCopyOut(&p[3*sizeof(uint32)], B_HOST_TO_LENDIAN_INT32(_currentOutputBufferOffset)); // start offset (within its message) for this sub-chunk
muscleCopyOut(&p[4*sizeof(uint32)], B_HOST_TO_LENDIAN_INT32(dataBytesToSend)); // size of this sub-chunk
muscleCopyOut(&p[5*sizeof(uint32)], B_HOST_TO_LENDIAN_INT32(sbSize)); // total size of this message
//printf("CREATING PACKET magic=" UINT32_FORMAT_SPEC " msgID=" UINT32_FORMAT_SPEC " offset=" UINT32_FORMAT_SPEC " chunkSize=" UINT32_FORMAT_SPEC " totalSize=" UINT32_FORMAT_SPEC "\n", _magic, _sendMessageIDCounter, _currentOutputBufferOffset, dataBytesToSend, sbSize);
memcpy(p+FRAGMENT_HEADER_SIZE, _currentOutputBuffer()->GetBuffer()+_currentOutputBufferOffset, dataBytesToSend);
_outputPacketSize += (FRAGMENT_HEADER_SIZE+dataBytesToSend);
_currentOutputBufferOffset += dataBytesToSend;
if (_currentOutputBufferOffset == sbSize)
{
_currentOutputBuffer.Reset();
_fakeSendBuffer.Clear(_fakeSendBuffer.GetNumBytes() > MAX_CACHE_SIZE); // don't keep too much memory around!
_sendMessageIDCounter++;
}
}
// Step 2: If we have a non-empty packet to send, send it!
if (_outputPacketSize > 0)
{
// If bytesWritten is set to zero, we just hold this buffer until our next call.
int32 bytesWritten = GetDataIO()()->Write(_outputPacketBuffer.GetBuffer(), _outputPacketSize);
//printf("WROTE " INT32_FORMAT_SPEC "/" UINT32_FORMAT_SPEC " bytes %s\n", bytesWritten, _outputPacketSize, (bytesWritten==(int32)_outputPacketSize)?"":"******** SHORT ***********");
if (bytesWritten > 0)
{
if (bytesWritten != (int32)_outputPacketSize) LogTime(MUSCLE_LOG_ERROR, "PacketTunnelIOGateway::DoOutput(): Short write! (" INT32_FORMAT_SPEC "/" UINT32_FORMAT_SPEC " bytes)\n", bytesWritten, _outputPacketSize);
_outputPacketBuffer.Clear();
_outputPacketSize = 0;
totalBytesWritten += bytesWritten;
}
else if (bytesWritten == 0) break; // no more space to write, for now
else return -1;
}
else break; // nothing more to do!
}
return totalBytesWritten;
}
uint64
AbstractReflectSession ::
GetPulseTime(const PulseArgs &)
{
return muscleMin(IsThisSessionScheduledForPostSleepReconnect()?MUSCLE_TIME_NEVER:_reconnectTime, _asyncConnectTimeoutTime);
}
int32
PlainTextMessageIOGateway ::
DoInputImplementation(AbstractGatewayMessageReceiver & receiver, uint32 maxBytes)
{
TCHECKPOINT;
int32 ret = 0;
const int tempBufSize = 2048;
char buf[tempBufSize];
const uint32 mtuSize = GetMaximumPacketSize();
if (mtuSize > 0)
{
// Packet-IO implementation
char * pbuf = buf;
int pbufSize = tempBufSize;
ByteBufferRef bigBuf;
if (mtuSize > tempBufSize)
{
// Just in case our MTU size is too big for our on-stack buffer
bigBuf = GetByteBufferFromPool(mtuSize);
if (bigBuf())
{
pbuf = (char *) bigBuf()->GetBuffer();
pbufSize = bigBuf()->GetNumBytes();
}
}
while(true)
{
IPAddressAndPort sourceIAP;
const int32 bytesRead = GetPacketDataIO()->ReadFrom(pbuf, muscleMin(maxBytes, (uint32)(pbufSize-1)), sourceIAP);
if (bytesRead < 0) return (ret > 0) ? ret : -1;
else if (bytesRead > 0)
{
uint32 filteredBytesRead = bytesRead;
FilterInputBuffer(pbuf, filteredBytesRead, pbufSize-1);
ret += filteredBytesRead;
pbuf[filteredBytesRead] = '\0';
bool prevCharWasCarriageReturn = false; // deliberately a local var, since UDP packets should be independent of each other
MessageRef inMsg; // demand-allocated
int32 beginAt = 0;
for (uint32 i=0; i<filteredBytesRead; i++)
{
char nextChar = pbuf[i];
if ((nextChar == '\r')||(nextChar == '\n'))
{
pbuf[i] = '\0'; // terminate the string here
if ((nextChar == '\r')||(prevCharWasCarriageReturn == false)) inMsg = AddIncomingText(inMsg, &pbuf[beginAt]);
beginAt = i+1;
}
prevCharWasCarriageReturn = (nextChar == '\r');
}
if (beginAt < (int32)filteredBytesRead) inMsg = AddIncomingText(inMsg, &pbuf[beginAt]);
if (inMsg())
{
(void) inMsg()->AddFlat(PR_NAME_PACKET_REMOTE_LOCATION, sourceIAP);
receiver.CallMessageReceivedFromGateway(inMsg);
inMsg.Reset();
}
ret += bytesRead;
}
else return ret;
}
}
else
{
// Stream-IO implementation
const int32 bytesRead = GetDataIO()()->Read(buf, muscleMin(maxBytes, (uint32)(sizeof(buf)-1)));
if (bytesRead < 0)
{
FlushInput(receiver);
return -1;
}
if (bytesRead > 0)
{
uint32 filteredBytesRead = bytesRead;
FilterInputBuffer(buf, filteredBytesRead, sizeof(buf)-1);
ret += filteredBytesRead;
buf[filteredBytesRead] = '\0';
MessageRef inMsg; // demand-allocated
int32 beginAt = 0;
for (uint32 i=0; i<filteredBytesRead; i++)
{
char nextChar = buf[i];
if ((nextChar == '\r')||(nextChar == '\n'))
{
buf[i] = '\0'; // terminate the string here
if ((nextChar == '\r')||(_prevCharWasCarriageReturn == false)) inMsg = AddIncomingText(inMsg, &buf[beginAt]);
beginAt = i+1;
}
_prevCharWasCarriageReturn = (nextChar == '\r');
}
if (beginAt < (int32)filteredBytesRead)
{
if (_flushPartialIncomingLines) inMsg = AddIncomingText(inMsg, &buf[beginAt]);
else _incomingText += &buf[beginAt];
}
if (inMsg()) receiver.CallMessageReceivedFromGateway(inMsg);
}
}
return ret;
}
