Пример #1
0
def encode_comp_header(h_type, cs_id, time, size, msg_type, ms_id):
    """Serialize any type of chunk header."""

    if h_type == 3:
        # just the "basic header"
        return _encode_basic_header(h_type, cs_id, time)
    elif h_type == 0:
        # delegate
        return encode_full_header(cs_id, time, size, msg_type, ms_id)
    else:
        # check time field overflow
        write_time = time
        if time >= 0xffffff:
            write_time = 0xffffff
            h4 = _s_ulong_b.pack(time)
        else:
            write_time = time
            h4 = ''

        if h_type == 2:
            return (_encode_basic_header(h_type, cs_id) +
                    _s_time.pack((write_time >> 8) & 0xffff,
                                 write_time & 0xff) +
                    h4)

        return (_encode_basic_header(h_type, cs_id) +
                _s_time_size_type.pack((write_time >> 8) & 0xffff,
                                       write_time & 0xff,
                                       (size >> 8) & 0xffff, size & 0xff,
                                       msg_type) +
                h4)
Пример #2
0
def _encode_basic_header(h_type, cs_id, time=None):
    if cs_id > 0x013f:          # 256 + 63
        base = _s_ext_csid.pack((h_type << 6) | 1, cs_id - 64)
    elif cs_id > 0x3f:          # 63
        base = _s_double_uchar.pack(h_type << 6, cs_id - 64)
    else:
        base = _s_uchar.pack((h_type << 6) | cs_id)

    if time >= 0x00ffffff:       # implicit None < int
        return base + _s_ulong_b.pack(time)

    return base
Пример #3
0
def _encode_basic_header(h_type, cs_id, time=None):
    if cs_id > 0x013f:  # 256 + 63
        base = _s_ext_csid.pack((h_type << 6) | 1, cs_id - 64)
    elif cs_id > 0x3f:  # 63
        base = _s_double_uchar.pack(h_type << 6, cs_id - 64)
    else:
        base = _s_uchar.pack((h_type << 6) | cs_id)

    if time >= 0x00ffffff:  # implicit None < int
        return base + _s_ulong_b.pack(time)

    return base
Пример #4
0
def encode_full_header(cs_id, time, size, msg_type, ms_id):
    """Serialize an absolute (type 0) chunk header."""

    h1 = _encode_basic_header(0, cs_id)

    write_time = time
    if time >= 0xffffff:
        write_time = 0xffffff
        h4 = _s_ulong_b.pack(time)
    else:
        write_time = time
        h4 = ''

    h2 = _s_time_size_type.pack((write_time >> 8) & 0xffff, write_time & 0xff,
                                (size >> 8) & 0xffff, size & 0xff, msg_type)

    h3 = _s_ulong_l.pack(ms_id)

    return h1 + h2 + h3 + h4
Пример #5
0
def encode_full_header(cs_id, time, size, msg_type, ms_id):
    """Serialize an absolute (type 0) chunk header."""

    h1 = _encode_basic_header(0, cs_id)

    write_time = time
    if time >= 0xffffff:
        write_time = 0xffffff
        h4 = _s_ulong_b.pack(time)
    else:
        write_time = time
        h4 = ''

    h2 = _s_time_size_type.pack((write_time >> 8) & 0xffff, write_time & 0xff,
                                (size >> 8) & 0xffff, size & 0xff,
                                msg_type)

    h3 = _s_ulong_l.pack(ms_id)

    return h1 + h2 + h3 + h4
Пример #6
0
def encode_comp_header(h_type, cs_id, time, size, msg_type, ms_id):
    """Serialize any type of chunk header."""

    if h_type == 3:
        # just the "basic header"
        return _encode_basic_header(h_type, cs_id, time)
    elif h_type == 0:
        # delegate
        return encode_full_header(cs_id, time, size, msg_type, ms_id)
    else:
        # check time field overflow
        write_time = time
        if time >= 0xffffff:
            write_time = 0xffffff
            if time > 0xffffffff:
                time -= 0xffffffff
            try:
                h4 = _s_ulong_b.pack(time)
            except Exception, e:
                print 'BAH', h_type, time
                h4 = ''
        else:
Пример #7
0
def encode_comp_header(h_type, cs_id, time, size, msg_type, ms_id):
    """Serialize any type of chunk header."""

    if h_type == 3:
        # just the "basic header"
        return _encode_basic_header(h_type, cs_id, time)
    elif h_type == 0:
        # delegate
        return encode_full_header(cs_id, time, size, msg_type, ms_id)
    else:
        # check time field overflow
        write_time = time
        if time >= 0xffffff:
            write_time = 0xffffff
            if time > 0xffffffff:
                time -= 0xffffffff
            try:
                h4 = _s_ulong_b.pack(time)
            except Exception, e:
                print 'BAH', h_type, time
                h4 = ''
        else:
Пример #8
0
 def generate_response(self, request):
     return buffer(request, 0, 4) + (buffer(_s_ulong.pack(ms_time(self.epoch_time()))) + buffer(request, 8))
Пример #9
0
 def generate_response(self, request):
     return (buffer(request, 0, 4) +
             (buffer(_s_ulong.pack(ms_time(self.epoch_time()))) +
              buffer(request, 8)))