/**
* 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;
}
}
/**
* Internal function get the total length of primary block to write on the buffer
*
* @param bundle Bundle to generate
* @param dict Dictionary to get the offsets of the endpoint eids
* @param primary PrimaryBlock data strucre object
* @return Total numbers of Bytes required to write primary block
*/
protected static int get_primary_len(final Bundle bundle, Dictionary dict, PrimaryBlock primary) {
int primary_len = 0;
int block_len = 0;
primary.set_dictionary_length(0);
primary.set_block_length(0);
/*
* We need to figure out the total length of the primary block,
* except for the SDNVs used to encode flags and the length itself and
* the one byte version field.
*
* First, we determine the size of the dictionary by first
* figuring out all the unique strings, and in the process,
* remembering their offsets and summing up their lengths
* (including the null terminator for each).
*/
dict.get_offsets(bundle.dest(), primary.dest_scheme_offset(), primary.dest_ssp_offset());
block_len += SDNV.encoding_len(primary.dest_scheme_offset());
block_len += SDNV.encoding_len(primary.dest_ssp_offset());
dict.get_offsets(bundle.source(), primary.source_scheme_offset(), primary.source_ssp_offset());
block_len += SDNV.encoding_len(primary.source_scheme_offset());
block_len += SDNV.encoding_len(primary.source_ssp_offset());
dict.get_offsets(
bundle.replyto(), primary.replyto_scheme_offset(), primary.replyto_ssp_offset());
block_len += SDNV.encoding_len(primary.replyto_scheme_offset());
block_len += SDNV.encoding_len(primary.replyto_ssp_offset());
dict.get_offsets(
bundle.custodian(), primary.custodian_scheme_offset(), primary.custodian_ssp_offset());
block_len += SDNV.encoding_len(primary.custodian_scheme_offset());
block_len += SDNV.encoding_len(primary.custodian_ssp_offset());
primary.set_dictionary_length(dict.dict_length());
block_len += SDNV.encoding_len(bundle.creation_ts().seconds());
block_len += SDNV.encoding_len(bundle.creation_ts().seqno());
block_len += SDNV.encoding_len(bundle.expiration());
block_len += SDNV.encoding_len(primary.dictionary_length_value());
block_len += primary.dictionary_length_value();
/*
* If the bundle is a fragment, we need to include space for the
* fragment offset and the original payload length.
*
* Note: Any changes to this protocol must be reflected into the
* FragmentManager since it depends on this length when
* calculating fragment sizes.
*/
if (bundle.is_fragment()) {
block_len += SDNV.encoding_len(bundle.frag_offset());
block_len += SDNV.encoding_len(bundle.orig_length());
}
// Format the processing flags.
primary.set_processing_flags(format_bundle_flags(bundle));
primary.set_processing_flags(format_bundle_flags(bundle));
primary.set_processing_flags(primary.processing_flags_value() | format_cos_flags(bundle));
primary.set_processing_flags(primary.processing_flags_value() | format_srr_flags(bundle));
/*
* Finally, add up the initial preamble and the variable
* length part.
*/
primary.set_block_length(block_len);
primary_len =
(int)
(1
+ SDNV.encoding_len(primary.processing_flags)
+ SDNV.encoding_len(primary.block_length())
+ primary.block_length_value());
Log.d(TAG, "get_primary_len: for bundleid = " + bundle.bundleid() + ": " + primary_len);
// Fill in the remaining values of 'primary' just for the sake of returning
// a complete data structure.
primary.set_version(BundleProtocol.CURRENT_VERSION);
primary.set_creation_time(bundle.creation_ts().seconds());
primary.set_creation_sequence(bundle.creation_ts().seqno());
primary.set_lifetime(bundle.expiration());
return primary_len;
}
/**
* Generate primary block by encoding all the metadata of the primary block and copy to primary
* block writeable buffer.
*
* @param bundle Bundle to generate
* @param xmit_blocks xmit_blocks of the bundle
* @param block Primary block of the bundle to generate and write to the writeable buffer
*/
public void generate_primary(final Bundle bundle, BlockInfoVec xmit_blocks, BlockInfo block) {
// point at the local dictionary
Dictionary dict = xmit_blocks.dict();
int primary_len = 0; // total length of the primary block
PrimaryBlock primary = new PrimaryBlock();
primary_len = get_primary_len(bundle, dict, primary);
block.set_contents(new SerializableByteBuffer(primary_len));
block.set_data_length((int) primary.block_length_value());
block.set_data_offset((int) (primary_len - primary.block_length_value()));
/*
* Advance buf and decrement len as we go through the process.
*/
IByteBuffer buf = block.writable_contents();
int len = primary_len;
Log.d(TAG, String.format("generating primary: length %s", primary_len));
// Stick the version number in the first byte.
buf.put((byte) BundleProtocol.CURRENT_VERSION);
len -= 1;
len -= write_sdnv(primary.processing_flags(), buf);
len -= write_sdnv(primary.block_length(), buf);
len -= write_sdnv(primary.dest_scheme_offset(), buf);
len -= write_sdnv(primary.dest_ssp_offset(), buf);
len -= write_sdnv(primary.source_scheme_offset(), buf);
len -= write_sdnv(primary.source_ssp_offset(), buf);
len -= write_sdnv(primary.replyto_scheme_offset(), buf);
len -= write_sdnv(primary.replyto_ssp_offset(), buf);
len -= write_sdnv(primary.custodian_scheme_offset(), buf);
len -= write_sdnv(primary.custodian_ssp_offset(), buf);
len -= write_sdnv(bundle.creation_ts().seconds(), buf);
len -= write_sdnv(bundle.creation_ts().seqno(), buf);
len -= write_sdnv(bundle.expiration(), buf);
len -= write_sdnv(primary.dictionary_length(), buf);
// Add the dictionary.
Log.d(TAG, "Current Buf: " + buf.position());
Log.d(TAG, "Dict length: " + dict.dict_length());
Log.d(TAG, "Dict length: " + dict.dict_length());
buf.put(dict.dict());
// memcpy(buf, dict->dict(), dict->length());
// buf += dict->length();
len -= dict.dict_length();
Log.d(TAG, "Preparing len:" + len);
/*
* If the bundle is a fragment, stuff in SDNVs for the fragment
* offset and original length.
*/
if (bundle.is_fragment()) {
len -= write_sdnv(bundle.frag_offset(), buf);
Log.d(TAG, "Preparing len:" + len);
len -= write_sdnv(bundle.orig_length(), buf);
Log.d(TAG, "Preparing len:" + len);
}
/*
* Asuming that get_primary_len is written correctly, len should
* now be zero since we initialized it to primary_len at the
* beginning of the function.
*/
buf.position(0);
assert (len == 0) : TAG + ": len not ==0";
Log.e(TAG, "Current Len: " + len);
}