/**
* Produce a bundle by coping all payload and payload block metadata to buffer.
*
* @param bundle Bundle to produce
* @param block Payload block of Bundle
* @param buf Copy the data on the current position this buffer
* @param offset Offset of the block data. Keep track of how many bytes have been produced before.
* @param len Number of bytes to produce
*/
public void produce(
final Bundle bundle, final BlockInfo block, IByteBuffer buf, int offset, int len) {
int old_position = buf.position();
// First copy out the specified range of the preamble
if (offset < block.data_offset()) {
int tocopy = Math.min(len, block.data_offset() - offset);
BufferHelper.copy_data(buf, buf.position(), block.contents(), offset, tocopy);
buf.position(buf.position() + tocopy);
offset += tocopy;
len -= tocopy;
}
if (len == 0) {
buf.position(old_position);
return;
}
// Adjust offset to account for the preamble
int payload_offset = offset - block.data_offset();
int tocopy = (int) Math.min(len, bundle.payload().length() - payload_offset);
bundle.payload().read_data(payload_offset, tocopy, buf);
buf.position(old_position);
return;
}
/** Sending and receiving data by the socket */
@Override
void handle_poll_activity(int timeout) {
if (!socket_.isConnected()) {
Log.d(TAG, "Socket is not connected");
break_contact(ContactEvent.reason_t.BROKEN);
}
// if we have something to send , send it first
if (sendbuf_.position() > 0) send_data();
// poll to receive and process data
try {
num_to_read_ = read_stream_.available();
// check that there's something to read
if (num_to_read_ > 0) {
Log.d(TAG, "before reading position is " + recvbuf_.position());
java.nio.ByteBuffer temp_java_nio_buf = java.nio.ByteBuffer.allocate(recvbuf_.remaining());
read_channel_.read(temp_java_nio_buf);
BufferHelper.copy_data(
recvbuf_, recvbuf_.position(), temp_java_nio_buf, 0, temp_java_nio_buf.position());
recvbuf_.position(recvbuf_.position() + temp_java_nio_buf.position());
if (DTNService.is_test_data_logging())
TestDataLogger.getInstance()
.set_downloaded_size(
TestDataLogger.getInstance().downloaded_size() + temp_java_nio_buf.position());
Log.d(TAG, "buffer position now is " + recvbuf_.position());
process_data();
if (recvbuf_.remaining() == 0) {
Log.e(TAG, "after process_data left no space in recvbuf!!");
}
}
} catch (IOException e) {
Log.e(TAG, "IOException, in reading data from the read_stream_:" + e.getMessage());
}
// send keep alive message if we should send it
if (contact_up_ && !contact_broken_) {
check_keepalive();
}
if (!contact_broken_) check_timeout();
}
@Override
void send_data() {
int last_position = sendbuf_.position();
sendbuf_.rewind();
try {
Log.d(TAG, "Going to write " + last_position + " bytes to the stream");
java.nio.ByteBuffer temp = java.nio.ByteBuffer.allocate(last_position);
BufferHelper.copy_data(temp, 0, sendbuf_, 0, last_position);
WriteSocketTimeoutTimer write_socket_timeout_timer =
new WriteSocketTimeoutTimer(write_channel_);
Log.d(TAG, "scheduling write_timeout_task in " + SOCKET_TIMEOUT + " seconds");
try {
// add the timer to keep looking for Socket timeout
write_socket_timeout_timer.schedule_in(SOCKET_TIMEOUT);
} catch (IllegalStateException e) {
Log.e(TAG, "write socket timer stop when it shouldn't be stopped");
}
write_channel_.write(temp);
// cancel the timer if it's come here, this means the writting is
// successful
write_socket_timeout_timer.cancel();
write_socket_timeout_timer = null;
// move the remaining data back to beginning for next writting
// the position of the buffer will be moved to the newly available
// position after movement
sendbuf_.rewind();
if (DTNService.is_test_data_logging())
TestDataLogger.getInstance()
.set_uploaded_size(TestDataLogger.getInstance().uploaded_size() + last_position);
} catch (AsynchronousCloseException e) {
Log.e(TAG, "another thread close the channel because of the timeout");
break_contact(reason_t.CL_ERROR);
sendbuf_.position(last_position);
} catch (IOException e) {
Log.e(TAG, "writting broken pipe");
break_contact(reason_t.CL_ERROR);
sendbuf_.position(last_position);
}
}
/**
* This function consumes the primary block of the bundle. It is a virtual from BlockProcessor.
*
* @param bundle Bundle to set data after consuming
* @param blcok Primary block to set data after consuming
* @param buf Populated buffer to read data from for consuming
* @param len Number of bytes to consume
* @return Return number of bytes successfully consumed, In case of error return -1
*/
public int consume(Bundle bundle, BlockInfo block, IByteBuffer buffer, int len) {
int consumed = buffer.position();
PrimaryBlock primary = new PrimaryBlock();
// buf.position(0);
assert (!block.complete()) : TAG + ": consume() block already complete";
Dictionary dict = bundle.recv_blocks().dict();
IByteBuffer byte_buffer_temp = new SerializableByteBuffer(len);
// byte_buffer_temp = BufferHelper.reserve(byte_buffer_temp, len);
block.set_contents(byte_buffer_temp);
BufferHelper.copy_data(
byte_buffer_temp, byte_buffer_temp.position(), buffer, buffer.position(), len);
byte_buffer_temp.position(byte_buffer_temp.position() + len);
IByteBuffer buf_block_content = block.contents();
int primary_len = len = buf_block_content.capacity() - buf_block_content.remaining();
buf_block_content.position(0);
Log.d(TAG, " primary_len: " + primary_len + " : len:" + len);
assert (primary_len == len) : TAG + ": consume() primary!=len";
primary.set_version(buf_block_content.get());
if (primary.version() != BundleProtocol.CURRENT_VERSION) {
Log.e(
TAG,
String.format(
"protocol version mismatch %s != %s",
primary.version, BundleProtocol.CURRENT_VERSION));
return -1;
}
len -= 1;
try {
// Grab the SDNVs representing the flags and the block length.
len -= read_sdnv(buf_block_content, primary.processing_flags());
len -= read_sdnv(buf_block_content, primary.block_length());
Log.d(
TAG,
String.format(
"parsed primary block: version %s length %s",
primary.version(), block.data_length()));
// Parse the flags.
parse_bundle_flags(bundle, primary.processing_flags_value());
parse_cos_flags(bundle, primary.processing_flags_value());
parse_srr_flags(bundle, primary.processing_flags_value());
// What remains in the buffer should now be equal to what the block-length
// field advertised./
assert (len == block.data_length()) : TAG + ": consume() data and block length not equal";
// set data_offset
block.set_data_offset(buf_block_content.position());
block.set_data_length((int) primary.block_length_value());
len -= read_sdnv(buf_block_content, primary.dest_scheme_offset());
len -= read_sdnv(buf_block_content, primary.dest_ssp_offset());
len -= read_sdnv(buf_block_content, primary.source_scheme_offset());
len -= read_sdnv(buf_block_content, primary.source_ssp_offset());
len -= read_sdnv(buf_block_content, primary.replyto_scheme_offset());
len -= read_sdnv(buf_block_content, primary.replyto_ssp_offset());
len -= read_sdnv(buf_block_content, primary.custodian_scheme_offset());
len -= read_sdnv(buf_block_content, primary.custodian_ssp_offset());
len -= read_sdnv(buf_block_content, primary.creation_time());
if (primary.creation_time_value() > Integer.MAX_VALUE) {
Log.e(
TAG,
String.format(
"creation timestamp time is too large: %s", primary.creation_time_value()));
return -1;
}
len -= read_sdnv(buf_block_content, primary.creation_sequence());
if (primary.creation_sequence_value() > Integer.MAX_VALUE) {
Log.e(
TAG,
String.format(
"creation timestamp sequence is too large: %s", primary.creation_sequence()));
return -1;
}
len -= read_sdnv(buf_block_content, primary.lifetime());
if (primary.lifetime_value() > Integer.MAX_VALUE) {
Log.e(TAG, String.format("lifetime is too large: %s", primary.lifetime));
return -1;
}
len -= read_sdnv(buf_block_content, primary.dictionary_length());
// Make sure that the creation timestamp parts and the lifetime fit into
// a 32 bit integer.
bundle.set_creation_ts(
new BundleTimestamp(primary.creation_time_value(), primary.creation_sequence_value()));
bundle.set_expiration((int) primary.lifetime_value());
/*
* Verify that we have the whole dictionary.
*/
if (len < primary.dictionary_length_value()) {
Log.e(
TAG,
String.format("primary block advertised incorrect length %s", block.data_length()));
return -1;
}
/*
* Make sure that the dictionary ends with a null byte./
*/
if (buf_block_content.get(
(int) (buf_block_content.position() + primary.dictionary_length_value() - 1))
!= '\0') {
Log.e(TAG, "dictionary does not end with a NULL character! " + primary_len);
return -1;
}
/*
* Now use the dictionary buffer to parse out the various endpoint
* identifiers, making sure that none of them peeks past the end
* of the dictionary block.
*/
IByteBuffer dictionary = buf_block_content;
len -= primary.dictionary_length_value();
Log.d(TAG, "Dict starting point :" + (primary_len - primary.dictionary_length_value()));
// dictionary.position((int)(primary_len-primary.dictionary_length_value()));
dict.set_dict(dictionary, (int) primary.dictionary_length_value());
Log.d(TAG, "Extract source :" + (primary_len - primary.dictionary_length_value()));
if (!dict.extract_eid(
bundle.source(), primary.source_scheme_offset(), primary.source_ssp_offset())) {
Log.e(TAG, "Extract source fail:");
} else {
block.eid_list().add(bundle.source());
Log.d(TAG, "Extract source :" + bundle.source().str());
}
if (!dict.extract_eid(
bundle.dest(), primary.dest_scheme_offset(), primary.dest_ssp_offset())) {
Log.e(TAG, "Extract dest fail:");
} else {
block.eid_list().add(bundle.dest());
Log.d(TAG, "Extract dest :" + bundle.dest().str());
}
if (!dict.extract_eid(
bundle.replyto(), primary.replyto_scheme_offset(), primary.replyto_ssp_offset())) {
Log.e(TAG, "Extract reply fail :");
} else {
block.eid_list().add(bundle.replyto());
Log.d(TAG, "Extract reply :" + bundle.replyto().str());
}
if (!dict.extract_eid(
bundle.custodian(), primary.custodian_scheme_offset(), primary.custodian_ssp_offset())) {
Log.e(TAG, "Extract custodian fail:");
} else {
block.eid_list().add(bundle.custodian());
Log.d(TAG, "Extract custodian :" + bundle.custodian().str());
}
buf_block_content.position(
(int) (buf_block_content.position() + primary.dictionary_length_value()));
// If the bundle is a fragment, grab the fragment offset and original
// bundle size (and make sure they fit in a 32 bit integer).
if (bundle.is_fragment()) {
int[] sdnv_buf = new int[1];
sdnv_buf[0] = 0;
len -= read_sdnv(buf_block_content, sdnv_buf);
if ((int) sdnv_buf[0] > Integer.MAX_VALUE) {
Log.e(TAG, String.format("fragment offset is too large: %s", sdnv_buf));
return -1;
}
bundle.set_frag_offset(sdnv_buf[0]);
sdnv_buf[0] = 0;
len -= read_sdnv(buf_block_content, sdnv_buf);
if (sdnv_buf[0] > Integer.MAX_VALUE) {
Log.e(TAG, String.format("fragment original length is too large: %s", sdnv_buf));
return -1;
}
bundle.set_orig_length(sdnv_buf[0]);
Log.d(
TAG,
String.format(
TAG,
"parsed fragmentation info: offset %s orig_len %s",
bundle.frag_offset(),
bundle.orig_length()));
}
Log.d(TAG, "primary_len: " + primary_len + " : ln" + len + ": Consumed" + consumed);
block.set_complete(true);
return primary_len - len;
} catch (BlockProcessorTooShortException e) {
// revert position
buf_block_content.position();
return -1;
}
}