Examples with ByteBuffer java.nio.ByteBuffer used on opensource projects

Example 36 with ByteBuffer

use of java.nio.ByteBuffer in project AndroidAsync by koush.

the class DnsResponse method parse.

public static DnsResponse parse(ByteBufferList bb) {
    ByteBuffer b = bb.getAll();
    bb.add(b.duplicate());
    // naive parsing...
    bb.order(ByteOrder.BIG_ENDIAN);
    // id
    bb.getShort();
    // flags
    bb.getShort();
    // number questions
    int questions = bb.getShort();
    // number answer rr
    int answers = bb.getShort();
    // number authority rr
    int authorities = bb.getShort();
    // number additional rr
    int additionals = bb.getShort();
    for (int i = 0; i < questions; i++) {
        parseName(bb, b);
        // type
        bb.getShort();
        // class
        bb.getShort();
    }
    DnsResponse response = new DnsResponse();
    for (int i = 0; i < answers; i++) {
        String name = parseName(bb, b);
        // type
        int type = bb.getShort();
        // class
        int clazz = bb.getShort();
        // ttl
        int ttl = bb.getInt();
        // length of address
        int length = bb.getShort();
        try {
            if (type == 1) {
                // data
                byte[] data = new byte[length];
                bb.get(data);
                response.addresses.add(InetAddress.getByAddress(data));
            } else if (type == 0x000c) {
                response.names.add(parseName(bb, b));
            } else if (type == 16) {
                ByteBufferList txt = new ByteBufferList();
                bb.get(txt, length);
                response.parseTxt(txt);
            } else {
                bb.get(new byte[length]);
            }
        } catch (Exception e) {
        //                e.printStackTrace();
        }
    }
    // authorities
    for (int i = 0; i < authorities; i++) {
        String name = parseName(bb, b);
        // type
        int type = bb.getShort();
        // class
        int clazz = bb.getShort();
        // ttl
        int ttl = bb.getInt();
        // length of address
        int length = bb.getShort();
        try {
            bb.get(new byte[length]);
        } catch (Exception e) {
        //                e.printStackTrace();
        }
    }
    // additionals
    for (int i = 0; i < additionals; i++) {
        String name = parseName(bb, b);
        // type
        int type = bb.getShort();
        // class
        int clazz = bb.getShort();
        // ttl
        int ttl = bb.getInt();
        // length of address
        int length = bb.getShort();
        try {
            if (type == 16) {
                ByteBufferList txt = new ByteBufferList();
                bb.get(txt, length);
                response.parseTxt(txt);
            } else {
                bb.get(new byte[length]);
            }
        } catch (Exception e) {
        //                e.printStackTrace();
        }
    }
    return response;
}

Example 37 with ByteBuffer

use of java.nio.ByteBuffer in project AndroidAsync by koush.

the class DnsResponse method parseName.

private static String parseName(ByteBufferList bb, ByteBuffer backReference) {
    bb.order(ByteOrder.BIG_ENDIAN);
    String ret = "";
    int len;
    while (0 != (len = bb.get() & 0x00FF)) {
        // compressed
        if ((len & 0x00c0) == 0x00c0) {
            int offset = ((len & ~0xFFFFFFc0) << 8) | (bb.get() & 0x00FF);
            if (ret.length() > 0)
                ret += ".";
            ByteBufferList sub = new ByteBufferList();
            ByteBuffer duplicate = backReference.duplicate();
            duplicate.get(new byte[offset]);
            sub.add(duplicate);
            return ret + parseName(sub, backReference);
        }
        byte[] bytes = new byte[len];
        bb.get(bytes);
        if (ret.length() > 0)
            ret += ".";
        ret += new String(bytes);
    }
    return ret;
}

Example 38 with ByteBuffer

use of java.nio.ByteBuffer in project AndroidAsync by koush.

the class AsyncNetworkSocket method onReadable.

int onReadable() {
    spitPending();
    // already in the selector's ready queue.
    if (mPaused)
        return 0;
    int total = 0;
    try {
        boolean closed = false;
        //            ByteBufferList.obtainArray(buffers, Math.min(Math.max(mToAlloc, 2 << 11), maxAlloc));
        ByteBuffer b = allocator.allocate();
        // keep track of the max mount read during this read cycle
        // so we can be quicker about allocations during the next
        // time this socket reads.
        long read = mChannel.read(b);
        if (read < 0) {
            closeInternal();
            closed = true;
        } else {
            total += read;
        }
        if (read > 0) {
            allocator.track(read);
            b.flip();
            //                for (int i = 0; i < buffers.length; i++) {
            //                    ByteBuffer b = buffers[i];
            //                    buffers[i] = null;
            //                    b.flip();
            //                    pending.add(b);
            //                }
            pending.add(b);
            Util.emitAllData(this, pending);
        } else {
            ByteBufferList.reclaim(b);
        }
        if (closed) {
            reportEndPending(null);
            reportClose(null);
        }
    } catch (Exception e) {
        closeInternal();
        reportEndPending(e);
        reportClose(e);
    }
    return total;
}

Example 39 with ByteBuffer

use of java.nio.ByteBuffer in project libgdx by libgdx.

the class BufferUtils method newUnsafeByteBuffer.

/** Allocates a new direct ByteBuffer from native heap memory using the native byte order. Needs to be disposed with
	 * {@link #freeMemory(ByteBuffer)}.
	 * @param numBytes */
public static ByteBuffer newUnsafeByteBuffer(int numBytes) {
    ByteBuffer buffer = newDisposableByteBuffer(numBytes);
    buffer.order(ByteOrder.nativeOrder());
    allocatedUnsafe += numBytes;
    synchronized (unsafeBuffers) {
        unsafeBuffers.add(buffer);
    }
    return buffer;
}

Example 40 with ByteBuffer

use of java.nio.ByteBuffer in project hs4j by killme2008.

the class AbstractNioSession method doRealWrite.

protected final long doRealWrite(SelectableChannel channel, IoBuffer buffer) throws IOException {
    if (log.isDebugEnabled()) {
        StringBuffer bufMsg = new StringBuffer("send buffers:\n[\n");
        final ByteBuffer buff = buffer.buf();
        bufMsg.append(" buffer:position=").append(buff.position()).append(",limit=").append(buff.limit()).append(",capacity=").append(buff.capacity()).append("\n");
        bufMsg.append("]");
        bufMsg.append("\n");
        for (byte b : buff.array()) bufMsg.append("0x").append(Integer.toHexString(b)).append(",");
        bufMsg.append("\n");
        bufMsg.append(new String(buff.array()));
        log.debug(bufMsg.toString());
    }
    return ((WritableByteChannel) channel).write(buffer.buf());
}