def te(s, exc):
print(s)
try:
bdecode(s)
except exc:
pass
else:
assert False, "didn't raise exception"
def t(s, value, remainder):
print(s)
# Test "one-shot":
rv, rr = bdecode(s)
assert rv == value, "expected value %s but got %s" % (rv, value)
rrstr = s[rr:]
assert rrstr == remainder, "expected remainder value %s but got %s" % (remainder, rrstr)
# With gibberish added:
g_str = s + "asdf"
rv, rr = bdecode(g_str)
assert rv == value, "expected value %s but got %s" % (rv, value)
rrstr = g_str[rr:]
assert rrstr.endswith("asdf")
def t(v, encstr=None):
be = bencode(v)
print("bencode(%s)=%s" % (v, be))
if encstr:
assert be==encstr
restored = bdecode(be)
print("decode(%s)=%s" % (be, restored))
list = restored[0]
if len(list)!=len(v):
print("MISMATCH!")
print("v=%s" % v)
print("l=%s" % list)
assert len(list)==2
assert list[0]==v[0]
for ok,ov in v[1].items():
d = list[1]
if ok not in d:
print("restored dict is missing %s" % ok)
return list
rv = d.get(ok)
if rv!=ov:
print("value for %s does not match: %s vs %s" % (ok, ov, rv))
return list
return list
def test_large_dict():
import gtk.gdk
from wimpiggy.lowlevel import get_keycode_mappings #@UnresolvedImport
mappings = get_keycode_mappings(gtk.gdk.get_default_root_window())
b = bencode(mappings)
print("bencode(%s)=%s" % (mappings, b))
d = bdecode(b)
print("bdecode(%s)=%s" % (b, d))
def _read_parse_thread_loop(self):
try:
read_buffer = None
current_packet_size = -1
while not self._closed:
buf = self._read_queue.get()
if not buf:
return self._call_connection_lost(
"empty marker in read queue")
if self._decompressor is not None:
buf = self._decompressor.decompress(buf)
if read_buffer:
read_buffer = read_buffer + buf
else:
read_buffer = buf
bl = len(read_buffer)
if self.max_packet_size > 0 and bl > self.max_packet_size:
return self._call_connection_lost(
"read buffer too big: %s (maximum is %s), dropping this connection!"
% (bl, self.max_packet_size))
while not self._closed:
bl = len(read_buffer)
if bl <= 0:
break
try:
if current_packet_size < 0 and bl > 0 and read_buffer[
0] in ["P", ord("P")]:
#spotted packet size header
if bl < 16:
break #incomplete
current_packet_size = int(read_buffer[2:16])
read_buffer = read_buffer[16:]
bl = len(read_buffer)
if current_packet_size > 0 and bl < current_packet_size:
log.debug(
"incomplete packet: only %s of %s bytes received",
bl, current_packet_size)
break
if sys.version >= '3':
result = bdecode(read_buffer.decode("latin1"))
else:
result = bdecode(read_buffer)
except ValueError, e:
import traceback
traceback.print_exc()
log.error("value error reading packet: %s", e)
#could be a partial packet (without size header)
#or could be just a broken packet...
def packet_error(buf, packet_size, data_size,
value_error):
if self._closed:
return
# Peek at the data we got, in case we can make sense of it:
self._process_packet([Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost(
"gibberish received: %s, packet size=%s, buffer size=%s, error=%s"
% (repr_ellipsized(buf), packet_size,
data_size, value_error))
if current_packet_size > 0:
#we had the size, so the packet should have been valid!
packet_error(read_buffer, current_packet_size, bl,
e)
return
else:
#wait a little before deciding
#unsized packets are either old clients (don't really care about them)
#or hello packets (small-ish)
def check_error_state(old_buffer, packet_size,
data_size, value_error):
log.info(
"check_error_state old_buffer=%s, read buffer=%s",
old_buffer, read_buffer)
if old_buffer == read_buffer:
packet_error(read_buffer, packet_size,
data_size, value_error)
log.info(
"error parsing packet without a size header: %s, current_packet_size=%s, will check again in 1 second",
e, current_packet_size)
gobject.timeout_add(1000, check_error_state,
read_buffer,
current_packet_size, bl, e)
break
current_packet_size = -1
if result is None or self._closed:
break
packet, l = result
gobject.idle_add(self._process_packet, packet)
unprocessed = read_buffer[l:]
if packet[0] == "set_deflate":
had_deflate = (self._decompressor is not None)
level = packet[1]
log(
"set_deflate packet, changing decompressor to level=%s",
level)
if level == 0:
self._decompressor = None
else:
self._decompressor = zlib.decompressobj()
if not had_deflate and (self._decompressor
is not None):
# deflate was just enabled: so decompress the unprocessed
# data
unprocessed = self._decompressor.decompress(
unprocessed)
read_buffer = unprocessed
finally:
log("read parse thread: ended")
def _read_parse_thread_loop(self):
try:
current_packet_size = -1
while not self._closed:
buf = self._read_queue.get()
if not buf:
return self._call_connection_lost(
"empty marker in read queue")
if self._decompressor is not None:
buf = self._decompressor.decompress(buf)
if self._read_buffer:
self._read_buffer = self._read_buffer + buf
else:
self._read_buffer = buf
while not self._closed and len(self._read_buffer) > 0:
had_deflate = (self._decompressor is not None)
try:
if current_packet_size < 0 and len(
self._read_buffer
) > 0 and self._read_buffer[0] == "P":
#spotted packet size header
if len(self._read_buffer) < 16:
break #incomplete
current_packet_size = int(self._read_buffer[2:16])
self._read_buffer = self._read_buffer[16:]
if current_packet_size > 0 and len(
self._read_buffer) < current_packet_size:
log.debug(
"incomplete packet: only %s of %s bytes received",
len(self._read_buffer), current_packet_size)
break
result = bdecode(self._read_buffer)
except ValueError:
#could be a partial packet (without size header)
#or could be just a broken packet...
def packet_error(buf):
if self._closed:
return
# Peek at the data we got, in case we can make sense of it:
self._process_packet([Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost(
"gibberish received: %s" %
repr_ellipsized(buf))
if current_packet_size > 0:
#we had the size, so the packet should have been valid!
packet_error(self._read_buffer)
return
else:
#wait a little before deciding
#unsized packets are either old clients (don't really care about them)
#or hello packets (small-ish)
def check_error_state(old_buffer):
if old_buffer == self._read_buffer:
packet_error(self._read_buffer)
gobject.timeout_add_seconds(
1000, check_error_state, self._read_buffer)
break
current_packet_size = -1
if result is None or self._closed:
break
packet, l = result
gobject.idle_add(self._process_packet, packet)
unprocessed = self._read_buffer[l:]
if packet[0] == "set_deflate":
level = packet[1]
log(
"set_deflate packet, changing decompressor to level=%s",
level)
if level == 0:
self._decompressor = None
else:
self._decompressor = zlib.decompressobj()
if not had_deflate and (self._decompressor is not None):
# deflate was just enabled: so decompress the unprocessed
# data
unprocessed = self._decompressor.decompress(
unprocessed)
self._read_buffer = unprocessed
finally:
log("read parse thread: ended")
def do_read_parse_thread_loop(self):
"""
Process the individual network packets placed in _read_queue.
We concatenate them, then try to parse them.
We extract the individual packets from the potentially large buffer,
saving the rest of the buffer for later, and optionally decompress this data
and re-construct the one python-object-packet from potentially multiple packets (see packet_index).
The 8 bytes packet header gives us information on the packet index, packet size and compression.
The actual processing of the packet is done in the main thread via gobject.idle_add
"""
read_buffer = None
current_packet_size = -1
packet_index = 0
compression_level = False
raw_packets = {}
while not self._closed:
buf = self._read_queue.get()
if not buf:
log("read thread: empty marker, exiting")
gobject.idle_add(self.close)
return
if read_buffer:
read_buffer = read_buffer + buf
else:
read_buffer = buf
bl = len(read_buffer)
while not self._closed:
bl = len(read_buffer)
if bl<=0:
break
if current_packet_size<0:
if read_buffer[0] not in ["P", ord("P")]:
return self._call_connection_lost("invalid packet header: ('%s...'), not an xpra client?" % read_buffer[:32])
if bl<8:
break #packet still too small
if read_buffer[1] in ["S", ord("S")]:
#old packet format: "PS%02d%012d" - 16 bytes
#can be dropped when we drop compatibility with clients older than 0.5
#0.3 and 0.4 still send the initial "hello" packet using this old format..
if bl<16:
break
current_packet_size = int(read_buffer[2:16])
packet_index = 0
compression_level = 0
protocol_version = 0 #only bencode supported with old protocol
read_buffer = read_buffer[16:]
else:
#packet format: struct.pack('cBBBL', ...) - 8 bytes
try:
(_, protocol_version, compression_level, packet_index, current_packet_size) = struct.unpack_from('!cBBBL', read_buffer)
except Exception, e:
raise Exception("invalid packet format: %s", e)
read_buffer = read_buffer[8:]
bl = len(read_buffer)
if current_packet_size>self.max_packet_size:
#this packet is seemingly too big, but check again from the main UI thread
#this gives 'set_max_packet_size' a chance to run
def check_packet_size(size_to_check, packet_header):
log("check_packet_size(%s, %s) limit is %s", size_to_check, packet_header, self.max_packet_size)
if size_to_check>self.max_packet_size:
return self._call_connection_lost("invalid packet: size requested is %s (maximum allowed is %s - packet header: '%s'), dropping this connection!" %
(size_to_check, self.max_packet_size, packet_header))
gobject.timeout_add(1000, check_packet_size, current_packet_size, read_buffer[:32])
if current_packet_size>0 and bl<current_packet_size:
# incomplete packet, wait for the rest to arrive
break
#chop this packet from the buffer:
if len(read_buffer)==current_packet_size:
raw_string = read_buffer
read_buffer = ''
else:
raw_string = read_buffer[:current_packet_size]
read_buffer = read_buffer[current_packet_size:]
if compression_level>0:
if self.chunked_compression:
raw_string = zlib.decompress(raw_string)
else:
raw_string = self._decompressor.decompress(raw_string)
if sys.version>='3':
raw_string = raw_string.decode("latin1")
if self._closed:
return
if packet_index>0:
#raw packet, store it and continue:
raw_packets[packet_index] = raw_string
current_packet_size = -1
packet_index = 0
continue
result = None
try:
#final packet (packet_index==0), decode it:
if protocol_version==0:
result = bdecode(raw_string)
if result is None:
break
packet, l = result
assert l==len(raw_string)
elif protocol_version==1:
assert has_rencode, "we don't support rencode mode but the other end sent us a rencoded packet!"
packet = list(rencode_loads(raw_string))
else:
raise Exception("unsupported protocol version: %s" % protocol_version)
except ValueError, e:
import traceback
traceback.print_exc()
log.error("value error reading packet: %s", e)
if self._closed:
return
def gibberish(buf):
# Peek at the data we got, in case we can make sense of it:
self._process_packet([Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost("gibberish received: %s, packet index=%s, packet size=%s, buffer size=%s, error=%s" % (repr_ellipsized(raw_string), packet_index, current_packet_size, bl, e))
gobject.idle_add(gibberish, raw_string)
return
if self._closed:
return
current_packet_size = -1
#add any raw packets back into it:
if raw_packets:
for index,raw_data in raw_packets.items():
#replace placeholder with the raw_data packet data:
packet[index] = raw_data
raw_packets = {}
gobject.idle_add(self._process_packet, packet)
def do_read_parse_thread_loop(self):
"""
Process the individual network packets placed in _read_queue.
We concatenate them, then try to parse them.
We extract the individual packets from the potentially large buffer,
saving the rest of the buffer for later, and optionally decompress this data
and re-construct the one python-object-packet from potentially multiple packets (see packet_index).
The 8 bytes packet header gives us information on the packet index, packet size and compression.
The actual processing of the packet is done in the main thread via gobject.idle_add
"""
read_buffer = None
payload_size = -1
padding = None
packet_index = 0
compression_level = False
raw_packets = {}
while not self._closed:
buf = self._read_queue.get()
if not buf:
log("read thread: empty marker, exiting")
gobject.idle_add(self.close)
return
if read_buffer:
read_buffer = read_buffer + buf
else:
read_buffer = buf
bl = len(read_buffer)
while not self._closed:
bl = len(read_buffer)
if bl<=0:
break
if payload_size<0:
if read_buffer[0] not in ("P", ord("P")):
return self._call_connection_lost("invalid packet header byte: ('%s...'), not an xpra client?" % read_buffer[:32])
if bl<8:
break #packet still too small
#packet format: struct.pack('cBBBL', ...) - 8 bytes
try:
_, protocol_flags, compression_level, packet_index, data_size = unpack_header(read_buffer[:8])
except Exception, e:
raise Exception("failed to parse packet header: %s" % list(read_buffer[:8]), e)
read_buffer = read_buffer[8:]
bl = len(read_buffer)
if protocol_flags & Protocol.FLAGS_CIPHER:
assert self.cipher_in_block_size>0, "received cipher block but we don't have a cipher do decrypt it with"
padding = (self.cipher_in_block_size - data_size % self.cipher_in_block_size) * " "
payload_size = data_size + len(padding)
else:
#no cipher, no padding:
padding = None
payload_size = data_size
assert payload_size>0
if payload_size>self.max_packet_size:
#this packet is seemingly too big, but check again from the main UI thread
#this gives 'set_max_packet_size' a chance to run from "hello"
def check_packet_size(size_to_check, packet_header):
log("check_packet_size(%s, %s) limit is %s", size_to_check, packet_header, self.max_packet_size)
if size_to_check>self.max_packet_size:
return self._call_connection_lost("invalid packet: size requested is %s (maximum allowed is %s - packet header: '%s'), dropping this connection!" %
(size_to_check, self.max_packet_size, packet_header))
gobject.timeout_add(1000, check_packet_size, payload_size, read_buffer[:32])
if bl<payload_size:
# incomplete packet, wait for the rest to arrive
break
#chop this packet from the buffer:
if len(read_buffer)==payload_size:
raw_string = read_buffer
read_buffer = ''
else:
raw_string = read_buffer[:payload_size]
read_buffer = read_buffer[payload_size:]
#decrypt if needed:
data = raw_string
if self.cipher_in and protocol_flags & Protocol.FLAGS_CIPHER:
log("received %s encrypted bytes with %s padding", payload_size, len(padding))
data = self.cipher_in.decrypt(raw_string)
if padding:
assert data.endswith(padding), "decryption failed: string does not end with '%s': %s (%s) -> %s (%s)" % (padding, list(bytearray(raw_string)), type(raw_string), list(bytearray(data)), type(data))
data = data[:-len(padding)]
#uncompress if needed:
if compression_level>0:
if self.chunked_compression:
data = decompress(data)
else:
data = self._decompressor.decompress(data)
if sys.version>='3':
data = data.decode("latin1")
if self.cipher_in and not (protocol_flags & Protocol.FLAGS_CIPHER):
return self._call_connection_lost("unencrypted packet dropped: %s" % repr_ellipsized(data))
if self._closed:
return
if packet_index>0:
#raw packet, store it and continue:
raw_packets[packet_index] = data
payload_size = -1
packet_index = 0
if len(raw_packets)>=4:
return self._call_connection_lost("too many raw packets: %s" % len(raw_packets))
continue
#final packet (packet_index==0), decode it:
try:
if protocol_flags & Protocol.FLAGS_RENCODE:
assert has_rencode, "we don't support rencode mode but the other end sent us a rencoded packet!"
packet = list(rencode_loads(data))
else:
packet, l = bdecode(data)
assert l==len(data)
except ValueError, e:
import traceback
traceback.print_exc()
log.error("value error reading packet: %s", e)
if self._closed:
return
def gibberish(buf):
# Peek at the data we got, in case we can make sense of it:
self._process_packet_cb(self, [Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost("gibberish received: %s, packet index=%s, packet size=%s, buffer size=%s, error=%s" % (repr_ellipsized(data), packet_index, payload_size, bl, e))
gobject.idle_add(gibberish, data)
return
if self._closed:
return
payload_size = -1
padding = None
#add any raw packets back into it:
if raw_packets:
for index,raw_data in raw_packets.items():
#replace placeholder with the raw_data packet data:
packet[index] = raw_data
raw_packets = {}
try:
self._process_packet_cb(self, packet)
self.input_packetcount += 1
except KeyboardInterrupt:
raise
except:
log.warn("Unhandled error while processing a '%s' packet from peer", packet[0], exc_info=True)
def _read_parse_thread_loop(self):
try:
current_packet_size = -1
while not self._closed:
buf = self._read_queue.get()
if not buf:
return self._call_connection_lost("empty marker in read queue")
if self._decompressor is not None:
buf = self._decompressor.decompress(buf)
if self._read_buffer:
self._read_buffer = self._read_buffer + buf
else:
self._read_buffer = buf
while not self._closed and len(self._read_buffer)>0:
had_deflate = (self._decompressor is not None)
try:
if current_packet_size<0 and len(self._read_buffer)>0 and self._read_buffer[0]=="P":
#spotted packet size header
if len(self._read_buffer)<16:
break #incomplete
current_packet_size = int(self._read_buffer[2:16])
self._read_buffer = self._read_buffer[16:]
if current_packet_size>0 and len(self._read_buffer)<current_packet_size:
log.debug("incomplete packet: only %s of %s bytes received", len(self._read_buffer), current_packet_size)
break
result = bdecode(self._read_buffer)
except ValueError:
#could be a partial packet (without size header)
#or could be just a broken packet...
def packet_error(buf):
if self._closed:
return
# Peek at the data we got, in case we can make sense of it:
self._process_packet([Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost("gibberish received: %s" % repr_ellipsized(buf))
if current_packet_size>0:
#we had the size, so the packet should have been valid!
packet_error(self._read_buffer)
return
else:
#wait a little before deciding
#unsized packets are either old clients (don't really care about them)
#or hello packets (small-ish)
def check_error_state(old_buffer):
if old_buffer==self._read_buffer:
packet_error(self._read_buffer)
gobject.timeout_add_seconds(1000, check_error_state, self._read_buffer)
break
current_packet_size = -1
if result is None or self._closed:
break
packet, l = result
gobject.idle_add(self._process_packet, packet)
unprocessed = self._read_buffer[l:]
if packet[0]=="set_deflate":
level = packet[1]
log("set_deflate packet, changing decompressor to level=%s", level)
if level==0:
self._decompressor = None
else:
self._decompressor = zlib.decompressobj()
if not had_deflate and (self._decompressor is not None):
# deflate was just enabled: so decompress the unprocessed
# data
unprocessed = self._decompressor.decompress(unprocessed)
self._read_buffer = unprocessed
finally:
log("read parse thread: ended")
def do_read_parse_thread_loop(self):
"""
Process the individual network packets placed in _read_queue.
We concatenate them, then try to parse them.
We extract the individual packets from the potentially large buffer,
saving the rest of the buffer for later, and optionally decompress this data
and re-construct the one python-object-packet from potentially multiple packets (see packet_index).
The 8 bytes packet header gives us information on the packet index, packet size and compression.
The actual processing of the packet is done in the main thread via gobject.idle_add
"""
read_buffer = None
payload_size = -1
padding = None
packet_index = 0
compression_level = False
raw_packets = {}
while not self._closed:
buf = self._read_queue.get()
if not buf:
log("read thread: empty marker, exiting")
gobject.idle_add(self.close)
return
if read_buffer:
read_buffer = read_buffer + buf
else:
read_buffer = buf
bl = len(read_buffer)
while not self._closed:
bl = len(read_buffer)
if bl <= 0:
break
if payload_size < 0:
if read_buffer[0] not in ("P", ord("P")):
return self._call_connection_lost(
"invalid packet header byte: ('%s...'), not an xpra client?"
% read_buffer[:32])
if bl < 8:
break #packet still too small
#packet format: struct.pack('cBBBL', ...) - 8 bytes
try:
_, protocol_flags, compression_level, packet_index, data_size = unpack_header(
read_buffer[:8])
except Exception, e:
raise Exception(
"failed to parse packet header: %s" %
list(read_buffer[:8]), e)
read_buffer = read_buffer[8:]
bl = len(read_buffer)
if protocol_flags & Protocol.FLAGS_CIPHER:
assert self.cipher_in_block_size > 0, "received cipher block but we don't have a cipher do decrypt it with"
padding = (self.cipher_in_block_size -
data_size % self.cipher_in_block_size) * " "
payload_size = data_size + len(padding)
else:
#no cipher, no padding:
padding = None
payload_size = data_size
assert payload_size > 0
if payload_size > self.max_packet_size:
#this packet is seemingly too big, but check again from the main UI thread
#this gives 'set_max_packet_size' a chance to run from "hello"
def check_packet_size(size_to_check, packet_header):
log("check_packet_size(%s, %s) limit is %s",
size_to_check, packet_header, self.max_packet_size)
if size_to_check > self.max_packet_size:
return self._call_connection_lost(
"invalid packet: size requested is %s (maximum allowed is %s - packet header: '%s'), dropping this connection!"
% (size_to_check, self.max_packet_size,
packet_header))
gobject.timeout_add(1000, check_packet_size, payload_size,
read_buffer[:32])
if bl < payload_size:
# incomplete packet, wait for the rest to arrive
break
#chop this packet from the buffer:
if len(read_buffer) == payload_size:
raw_string = read_buffer
read_buffer = ''
else:
raw_string = read_buffer[:payload_size]
read_buffer = read_buffer[payload_size:]
#decrypt if needed:
data = raw_string
if self.cipher_in and protocol_flags & Protocol.FLAGS_CIPHER:
log("received %s encrypted bytes with %s padding",
payload_size, len(padding))
data = self.cipher_in.decrypt(raw_string)
if padding:
assert data.endswith(
padding
), "decryption failed: string does not end with '%s': %s (%s) -> %s (%s)" % (
padding, list(bytearray(raw_string)),
type(raw_string), list(
bytearray(data)), type(data))
data = data[:-len(padding)]
#uncompress if needed:
if compression_level > 0:
if self.chunked_compression:
data = decompress(data)
else:
data = self._decompressor.decompress(data)
if sys.version >= '3':
data = data.decode("latin1")
if self.cipher_in and not (protocol_flags
& Protocol.FLAGS_CIPHER):
return self._call_connection_lost(
"unencrypted packet dropped: %s" %
repr_ellipsized(data))
if self._closed:
return
if packet_index > 0:
#raw packet, store it and continue:
raw_packets[packet_index] = data
payload_size = -1
packet_index = 0
if len(raw_packets) >= 4:
return self._call_connection_lost(
"too many raw packets: %s" % len(raw_packets))
continue
#final packet (packet_index==0), decode it:
try:
if protocol_flags & Protocol.FLAGS_RENCODE:
assert has_rencode, "we don't support rencode mode but the other end sent us a rencoded packet!"
packet = list(rencode_loads(data))
else:
packet, l = bdecode(data)
assert l == len(data)
except ValueError, e:
import traceback
traceback.print_exc()
log.error("value error reading packet: %s", e)
if self._closed:
return
def gibberish(buf):
# Peek at the data we got, in case we can make sense of it:
self._process_packet_cb(self,
[Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost(
"gibberish received: %s, packet index=%s, packet size=%s, buffer size=%s, error=%s"
% (repr_ellipsized(data), packet_index,
payload_size, bl, e))
gobject.idle_add(gibberish, data)
return
if self._closed:
return
payload_size = -1
padding = None
#add any raw packets back into it:
if raw_packets:
for index, raw_data in raw_packets.items():
#replace placeholder with the raw_data packet data:
packet[index] = raw_data
raw_packets = {}
try:
self._process_packet_cb(self, packet)
self.input_packetcount += 1
except KeyboardInterrupt:
raise
except:
log.warn(
"Unhandled error while processing a '%s' packet from peer",
packet[0],
exc_info=True)
def do_read_parse_thread_loop(self):
"""
Process the individual network packets placed in _read_queue.
We concatenate them, then try to parse them.
We extract the individual packets from the potentially large buffer,
saving the rest of the buffer for later, and optionally decompress this data
and re-construct the one python-object-packet from potentially multiple packets (see packet_index).
The 8 bytes packet header gives us information on the packet index, packet size and compression.
The actual processing of the packet is done in the main thread via gobject.idle_add
"""
read_buffer = None
current_packet_size = -1
packet_index = 0
compression_level = False
raw_packets = {}
while not self._closed:
buf = self._read_queue.get()
if not buf:
log("read thread: empty marker, exiting")
gobject.idle_add(self.close)
return
if read_buffer:
read_buffer = read_buffer + buf
else:
read_buffer = buf
bl = len(read_buffer)
while not self._closed:
bl = len(read_buffer)
if bl <= 0:
break
if current_packet_size < 0:
if read_buffer[0] not in ["P", ord("P")]:
return self._call_connection_lost(
"invalid packet header: ('%s...'), not an xpra client?"
% read_buffer[:32])
if bl < 8:
break #packet still too small
#packet format: struct.pack('cBBBL', ...) - 8 bytes
try:
(_, protocol_version, compression_level, packet_index,
current_packet_size) = struct.unpack_from(
'!cBBBL', read_buffer)
except Exception, e:
raise Exception(
"invalid packet header: %s" %
list(read_buffer[:8]), e)
read_buffer = read_buffer[8:]
bl = len(read_buffer)
if current_packet_size > self.max_packet_size:
#this packet is seemingly too big, but check again from the main UI thread
#this gives 'set_max_packet_size' a chance to run
def check_packet_size(size_to_check, packet_header):
log("check_packet_size(%s, %s) limit is %s",
size_to_check, packet_header, self.max_packet_size)
if size_to_check > self.max_packet_size:
return self._call_connection_lost(
"invalid packet: size requested is %s (maximum allowed is %s - packet header: '%s'), dropping this connection!"
% (size_to_check, self.max_packet_size,
packet_header))
gobject.timeout_add(1000, check_packet_size,
current_packet_size, read_buffer[:32])
if current_packet_size > 0 and bl < current_packet_size:
# incomplete packet, wait for the rest to arrive
break
#chop this packet from the buffer:
if len(read_buffer) == current_packet_size:
raw_string = read_buffer
read_buffer = ''
else:
raw_string = read_buffer[:current_packet_size]
read_buffer = read_buffer[current_packet_size:]
if compression_level > 0:
if self.chunked_compression:
raw_string = zlib.decompress(raw_string)
else:
raw_string = self._decompressor.decompress(raw_string)
if sys.version >= '3':
raw_string = raw_string.decode("latin1")
if self._closed:
return
if packet_index > 0:
#raw packet, store it and continue:
raw_packets[packet_index] = raw_string
current_packet_size = -1
packet_index = 0
continue
result = None
try:
#final packet (packet_index==0), decode it:
if protocol_version == 0:
result = bdecode(raw_string)
if result is None:
break
packet, l = result
assert l == len(raw_string)
elif protocol_version == 1:
assert has_rencode, "we don't support rencode mode but the other end sent us a rencoded packet!"
packet = list(rencode_loads(raw_string))
else:
raise Exception("unsupported protocol version: %s" %
protocol_version)
except ValueError, e:
import traceback
traceback.print_exc()
log.error("value error reading packet: %s", e)
if self._closed:
return
def gibberish(buf):
# Peek at the data we got, in case we can make sense of it:
self._process_packet_cb(self,
[Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost(
"gibberish received: %s, packet index=%s, packet size=%s, buffer size=%s, error=%s"
% (repr_ellipsized(raw_string), packet_index,
current_packet_size, bl, e))
gobject.idle_add(gibberish, raw_string)
return
if self._closed:
return
current_packet_size = -1
#add any raw packets back into it:
if raw_packets:
for index, raw_data in raw_packets.items():
#replace placeholder with the raw_data packet data:
packet[index] = raw_data
raw_packets = {}
try:
self._process_packet_cb(self, packet)
self.input_packetcount += 1
except KeyboardInterrupt:
raise
except:
log.warn(
"Unhandled error while processing packet from peer",
exc_info=True)
NOYIELD or time.sleep(0)
def do_read_parse_thread_loop(self):
"""
Process the individual network packets placed in _read_queue.
We concatenate them, then decompress them (old protocol only),
then try to parse them.
Either the old (16 bytes) header, or the new (8 bytes) header with extra attributes.
We extract the individual packet from the potentially large buffer,
saving the rest of the buffer for later, and optionally decompress this data
(new protocol only) and re-construct the one python-object-packet
from potentially multiple packets (see raw_packets and packet_index - new protocol only).
The actual processing of the packet is done in the main thread via gobject.idle_add
The "set_deflate" are a special case (old protocol) that we trap here in order
to ensure we enable compression synchronously within the thread.
(this due for removal when we drop old protocol support)
"""
try:
read_buffer = None
current_packet_size = -1
packet_index = 0
compression_level = 0
raw_packets = {}
while not self._closed:
buf = self._read_queue.get()
if not buf:
log("read thread: empty marker, exiting")
gobject.idle_add(self.close)
return
if read_buffer:
read_buffer = read_buffer + buf
else:
read_buffer = buf
bl = len(read_buffer)
while not self._closed:
bl = len(read_buffer)
if bl <= 0:
break
if current_packet_size < 0:
if read_buffer[0] not in ["P", ord("P")]:
return self._call_connection_lost(
"invalid packet header, not an xpra client?")
if bl < 2:
break
if read_buffer[1] in ["S", ord("S")]:
#old packet format: "PS%02d%012d" - 16 bytes
if bl < 16:
break
current_packet_size = int(read_buffer[2:16])
packet_index = 0
compression_level = 0
read_buffer = read_buffer[16:]
else:
#new packet format: struct.pack('cBBBL', ...) - 8 bytes
if bl < 8:
break
try:
(_, _, compression_level, packet_index,
current_packet_size) = struct.unpack_from(
'!cBBBL', read_buffer)
except Exception, e:
raise Exception("invalid packet format: %s", e)
read_buffer = read_buffer[8:]
bl = len(read_buffer)
if current_packet_size > self.max_packet_size:
#this packet is seemingly too big, but check again from the main UI thread
#this gives 'set_max_packet_size' a chance to run
def check_packet_size(size_to_check, packet_header):
log("check_packet_size(%s, %s) limit is %s",
size_to_check, packet_header,
self.max_packet_size)
if size_to_check > self.max_packet_size:
return self._call_connection_lost(
"invalid packet: size requested is %s (maximum allowed is %s - packet header: '%s'), dropping this connection!"
% (size_to_check, self.max_packet_size,
packet_header))
gobject.timeout_add(1000, check_packet_size,
current_packet_size,
read_buffer[:32])
if current_packet_size > 0 and bl < current_packet_size:
# incomplete packet
break
#chop this packet from the buffer:
if len(read_buffer) == current_packet_size:
raw_string = read_buffer
read_buffer = ''
else:
raw_string = read_buffer[:current_packet_size]
read_buffer = read_buffer[current_packet_size:]
if compression_level > 0:
if self.chunked_compression:
raw_string = zlib.decompress(raw_string)
else:
raw_string = self._decompressor.decompress(
raw_string)
if sys.version >= '3':
raw_string = raw_string.decode("latin1")
if packet_index > 0:
#raw packet, store it and continue:
raw_packets[packet_index] = raw_string
current_packet_size = -1
packet_index = 0
continue
result = None
try:
#final packet (packet_index==0), decode it:
result = bdecode(raw_string)
except ValueError, e:
import traceback
traceback.print_exc()
log.error("value error reading packet: %s", e)
if self._closed:
return
def gibberish(buf):
# Peek at the data we got, in case we can make sense of it:
self._process_packet([Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost(
"gibberish received: %s, packet index=%s, packet size=%s, buffer size=%s, error=%s"
% (repr_ellipsized(raw_string), packet_index,
current_packet_size, bl, e))
gobject.idle_add(gibberish, raw_string)
return
current_packet_size = -1
if result is None or self._closed:
break
packet, l = result
#add any raw packets back into it:
if raw_packets:
for index, raw_data in raw_packets.items():
#replace placeholder with the raw_data packet data:
packet[index] = raw_data
raw_packets = {}
gobject.idle_add(self._process_packet, packet)
assert l == len(raw_string)
if packet[0] == "set_deflate":
level = packet[1]
if level != self._compression_level:
log(
"set_deflate packet, changing compressor to level=%s",
level)
previous_level = self._compression_level
self._compression_level = level
if level > 0:
if previous_level == 0 and not self.raw_packets:
# deflate was just enabled: so decompress the unprocessed data:
read_buffer = self._decompressor.decompress(
read_buffer)
def do_read_parse_thread_loop(self):
"""
Process the individual network packets placed in _read_queue.
We concatenate them, then decompress them (old protocol only),
then try to parse them.
Either the old (16 bytes) header, or the new (8 bytes) header with extra attributes.
We extract the individual packet from the potentially large buffer,
saving the rest of the buffer for later, and optionally decompress this data
(new protocol only) and re-construct the one python-object-packet
from potentially multiple packets (see raw_packets and packet_index - new protocol only).
The actual processing of the packet is done in the main thread via gobject.idle_add
The "set_deflate" are a special case (old protocol) that we trap here in order
to ensure we enable compression synchronously within the thread.
(this due for removal when we drop old protocol support)
"""
read_buffer = None
current_packet_size = -1
packet_index = 0
compression_level = 0
raw_packets = {}
while not self._closed:
buf = self._read_queue.get()
if not buf:
log("read thread: empty marker, exiting")
gobject.idle_add(self.close)
return
if read_buffer:
read_buffer = read_buffer + buf
else:
read_buffer = buf
bl = len(read_buffer)
while not self._closed:
bl = len(read_buffer)
if bl<=0:
break
if current_packet_size<0:
if read_buffer[0] not in ["P", ord("P")]:
return self._call_connection_lost("invalid packet header: ('%s...'), not an xpra client?" % read_buffer[:32])
if bl<2:
break
if read_buffer[1] in ["S", ord("S")]:
#old packet format: "PS%02d%012d" - 16 bytes
if bl<16:
break
current_packet_size = int(read_buffer[2:16])
packet_index = 0
compression_level = 0
read_buffer = read_buffer[16:]
else:
#new packet format: struct.pack('cBBBL', ...) - 8 bytes
if bl<8:
break
try:
(_, _, compression_level, packet_index, current_packet_size) = struct.unpack_from('!cBBBL', read_buffer)
except Exception, e:
raise Exception("invalid packet format: %s", e)
read_buffer = read_buffer[8:]
bl = len(read_buffer)
if current_packet_size>self.max_packet_size:
#this packet is seemingly too big, but check again from the main UI thread
#this gives 'set_max_packet_size' a chance to run
def check_packet_size(size_to_check, packet_header):
log("check_packet_size(%s, %s) limit is %s", size_to_check, packet_header, self.max_packet_size)
if size_to_check>self.max_packet_size:
return self._call_connection_lost("invalid packet: size requested is %s (maximum allowed is %s - packet header: '%s'), dropping this connection!" %
(size_to_check, self.max_packet_size, packet_header))
gobject.timeout_add(1000, check_packet_size, current_packet_size, read_buffer[:32])
if current_packet_size>0 and bl<current_packet_size:
# incomplete packet, wait for the rest to arrive
break
#chop this packet from the buffer:
if len(read_buffer)==current_packet_size:
raw_string = read_buffer
read_buffer = ''
else:
raw_string = read_buffer[:current_packet_size]
read_buffer = read_buffer[current_packet_size:]
if compression_level>0:
if self.chunked_compression:
raw_string = zlib.decompress(raw_string)
else:
raw_string = self._decompressor.decompress(raw_string)
if sys.version>='3':
raw_string = raw_string.decode("latin1")
if self._closed:
return
if packet_index>0:
#raw packet, store it and continue:
raw_packets[packet_index] = raw_string
current_packet_size = -1
packet_index = 0
continue
result = None
try:
#final packet (packet_index==0), decode it:
result = bdecode(raw_string)
except ValueError, e:
import traceback
traceback.print_exc()
log.error("value error reading packet: %s", e)
if self._closed:
return
def gibberish(buf):
# Peek at the data we got, in case we can make sense of it:
self._process_packet([Protocol.GIBBERISH, buf])
# Then hang up:
return self._connection_lost("gibberish received: %s, packet index=%s, packet size=%s, buffer size=%s, error=%s" % (repr_ellipsized(raw_string), packet_index, current_packet_size, bl, e))
gobject.idle_add(gibberish, raw_string)
return
if self._closed:
return
current_packet_size = -1
if result is None:
break
packet, l = result
#add any raw packets back into it:
if raw_packets:
for index,raw_data in raw_packets.items():
#replace placeholder with the raw_data packet data:
packet[index] = raw_data
raw_packets = {}
gobject.idle_add(self._process_packet, packet)
assert l==len(raw_string)
#special case: we can't wait for idle_add to make the call...
#(this will be removed in 0.5 in favour of the per-packet compression header)
if packet[0]=="set_deflate":
level = packet[1]
if level!=self._compression_level:
log("set_deflate packet, changing compressor to level=%s", level)
previous_level = self._compression_level
self._compression_level = level
if level>0:
if previous_level==0 and not self.raw_packets:
# deflate was just enabled: so decompress the unprocessed data:
read_buffer = self._decompressor.decompress(read_buffer)
