def authenticate_hmac(self, challenge_response, client_salt):
self.sessions = None
if not self.salt:
log.error("Error: illegal challenge response received - salt cleared or unset")
return None
#ensure this salt does not get re-used:
if client_salt is None:
salt = self.salt
else:
salt = xor(self.salt, client_salt)
self.salt = None
entry = self.get_auth_info()
log("authenticate(%s) auth-info=%s", self.username, entry)
if entry is None:
log.error("Error: authentication failed")
log.error(" no password for '%s' in '%s'", self.username, self.password_filename)
return None
fpassword, uid, gid, displays, env_options, session_options = entry
verify = hmac.HMAC(strtobytes(fpassword), strtobytes(salt), digestmod=hashlib.md5).hexdigest()
log("authenticate(%s) password='******', hex(salt)=%s, hash=%s", challenge_response, fpassword, binascii.hexlify(strtobytes(salt)), verify)
if not hmac.compare_digest(verify, challenge_response):
log("expected '%s' but got '%s'", verify, challenge_response)
log.error("Error: hmac password challenge for '%s' does not match", self.username)
return False
self.sessions = uid, gid, displays, env_options, session_options
return True
def _test_file_auth(self, name, module, genauthdata):
#no file, no go:
a = self._init_auth(module)
assert a.requires_challenge()
p = a.get_password()
assert not p, "got a password from %s: %s" % (a, p)
#challenge twice is a fail
assert a.get_challenge()
assert not a.get_challenge()
assert not a.get_challenge()
for muck in (0, 1):
f = tempfile.NamedTemporaryFile(prefix=name)
filename = f.name
with f:
a = self._init_auth(module, {"password_file" : filename})
password, filedata = genauthdata(a)
print("saving password file data='%s' to '%s'", filedata, filename)
f.write(strtobytes(filedata))
f.flush()
assert a.requires_challenge()
salt, mac = a.get_challenge()
assert salt
assert mac=="hmac"
password = strtobytes(password)
client_salt = strtobytes(uuid.uuid4().hex+uuid.uuid4().hex)
auth_salt = strtobytes(xor(salt, client_salt))
if muck==0:
verify = hmac.HMAC(password, auth_salt, digestmod=hashlib.md5).hexdigest()
assert a.authenticate(verify, client_salt)
assert not a.authenticate(verify, client_salt)
assert a.get_password()==password
elif muck==1:
for verify in ("whatever", None, "bad"):
assert not a.authenticate(verify, client_salt)
def authenticate_hmac(self, challenge_response, client_salt):
if not self.salt:
log.error("Error: illegal challenge response received - salt cleared or unset")
return None
#ensure this salt does not get re-used:
if client_salt is None:
salt = self.salt
else:
salt = xor(self.salt, client_salt)
self.salt = None
password = self.get_password()
if not password:
log.error("Error: %s authentication failed", self)
log.error(" no password defined for '%s'", self.username)
return False
verify = hmac.HMAC(strtobytes(password), strtobytes(salt), digestmod=hashlib.md5).hexdigest()
log("authenticate(%s) password=%s, hex(salt)=%s, hash=%s", challenge_response, password, binascii.hexlify(strtobytes(salt)), verify)
if hasattr(hmac, "compare_digest"):
eq = hmac.compare_digest(verify, challenge_response)
else:
eq = verify==challenge_response
if not eq:
log("expected '%s' but got '%s'", verify, challenge_response)
log.error("Error: hmac password challenge for '%s' does not match", self.username)
return False
return True
def get_key(password, key_salt, block_size, iterations):
global backend
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
from cryptography.hazmat.primitives import hashes
kdf = PBKDF2HMAC(algorithm=hashes.SHA1(), length=block_size, salt=strtobytes(key_salt), iterations=iterations, backend=backend)
key = kdf.derive(strtobytes(password))
return key
def test_large_xor_speed(self):
start = time.time()
size = 1*1024*1024 #1MB
zeroes = strtobytes(chr(0)*size)
ones = strtobytes(chr(1)*size)
count = 10
for _ in range(count):
self.check_xor(zeroes, ones, ones)
end = time.time()
speed = size/(end-start)/1024/1024
#print("%iMB/s: took %ims on average (%s iterations)" % (speed, 1000*(end-start)/count, count))
assert speed>0, "running the xor speed test took too long"
def _process_challenge(self, packet):
authlog("processing challenge: %s", packet[1:])
def warn_server_and_exit(code, message, server_message="authentication failed"):
authlog.error("Error: authentication failed:")
authlog.error(" %s", message)
self.disconnect_and_quit(code, server_message)
if not self.has_password():
warn_server_and_exit(EXIT_PASSWORD_REQUIRED, "this server requires authentication, please provide a password", "no password available")
return
password = self.load_password()
if not password:
warn_server_and_exit(EXIT_PASSWORD_FILE_ERROR, "failed to load password from file %s" % self.password_file, "no password available")
return
salt = packet[1]
if self.encryption:
assert len(packet)>=3, "challenge does not contain encryption details to use for the response"
server_cipher = typedict(packet[2])
key = self.get_encryption_key()
if key is None:
warn_server_and_exit(EXIT_ENCRYPTION, "the server does not use any encryption", "client requires encryption")
return
if not self.set_server_encryption(server_cipher, key):
return
#all server versions support a client salt,
#they also tell us which digest to use:
digest = packet[3]
client_salt = get_hex_uuid()+get_hex_uuid()
#TODO: use some key stretching algorigthm? (meh)
try:
from xpra.codecs.xor.cyxor import xor_str #@UnresolvedImport
salt = xor_str(salt, client_salt)
except:
salt = xor(salt, client_salt)
if digest==b"hmac":
import hmac, hashlib
password = strtobytes(password)
salt = strtobytes(salt)
challenge_response = hmac.HMAC(password, salt, digestmod=hashlib.md5).hexdigest()
elif digest==b"xor":
#don't send XORed password unencrypted:
if not self._protocol.cipher_out and not ALLOW_UNENCRYPTED_PASSWORDS:
warn_server_and_exit(EXIT_ENCRYPTION, "server requested digest %s, cowardly refusing to use it without encryption" % digest, "invalid digest")
return
challenge_response = xor(password, salt)
else:
warn_server_and_exit(EXIT_PASSWORD_REQUIRED, "server requested an unsupported digest: %s" % digest, "invalid digest")
return
if digest:
authlog("%s(%s, %s)=%s", digest, binascii.hexlify(password), binascii.hexlify(salt), challenge_response)
self.password_sent = True
self.remove_packet_handlers("challenge")
self.send_hello(challenge_response, client_salt)
def _test_hmac_auth(self, auth_class, password, **kwargs): for x in (password, "somethingelse"): a = self._init_auth(auth_class, **kwargs) assert a.requires_challenge() assert a.get_password() salt, mac = a.get_challenge() assert salt assert mac=="hmac", "invalid mac: %s" % mac client_salt = strtobytes(uuid.uuid4().hex+uuid.uuid4().hex) auth_salt = strtobytes(xor(salt, client_salt)) verify = hmac.HMAC(x, auth_salt, digestmod=hashlib.md5).hexdigest() passed = a.authenticate(verify, client_salt) assert passed == (x==password), "expected authentication to %s with %s vs %s" % (["fail", "succeed"][x==password], x, password) assert not a.authenticate(verify, client_salt)
def send_hello(self, challenge_response=None, client_salt=None):
try:
hello = self.make_hello_base()
if self.has_password() and not challenge_response:
#avoid sending the full hello: tell the server we want
#a packet challenge first
hello["challenge"] = True
else:
hello.update(self.make_hello())
except InitExit as e:
log.error("error preparing connection:")
log.error(" %s", e)
self.quit(EXIT_INTERNAL_ERROR)
return
except Exception as e:
log.error("error preparing connection: %s", e, exc_info=True)
self.quit(EXIT_INTERNAL_ERROR)
return
if challenge_response:
assert self.has_password(), "got a password challenge response but we don't have a password! (malicious or broken server?)"
hello["challenge_response"] = challenge_response
if client_salt:
hello["challenge_client_salt"] = client_salt
log("send_hello(%s) packet=%s", binascii.hexlify(strtobytes(challenge_response or "")), hello)
self.send("hello", hello)
def get_pixbuf_from_data(rgb_data, has_alpha, w, h, rowstride):
if is_gtk3():
data = array.array('B', strtobytes(rgb_data))
return GdkPixbuf.Pixbuf.new_from_data(data, GdkPixbuf.Colorspace.RGB,
True, 8, w, h, rowstride,
None, None)
return gdk.pixbuf_new_from_data(rgb_data, gdk.COLORSPACE_RGB, has_alpha, 8, w, h, rowstride)
def test_xor_str(self):
zeroes = strtobytes(chr(0)*16)
ones = strtobytes(chr(1)*16)
ff = strtobytes(chr(255)*16)
fe = strtobytes(chr(254)*16)
empty = b""
lstr = b"\0x80"*64
self.check_xor(zeroes, zeroes, zeroes)
self.check_xor(ones, ones, zeroes)
self.check_xor(ff, ones, fe)
self.check_xor(fe, ones, ff)
#feed some invalid data:
self.fail_xor(ones, empty)
self.fail_xor(empty, zeroes)
self.fail_xor(lstr, ff)
self.fail_xor(bool, int)
def send_hello(self, challenge_response=None, client_salt=None):
try:
hello = self.make_hello_base()
if (self.password_file or os.environ.get('XPRA_PASSWORD')) and not challenge_response:
#avoid sending the full hello: tell the server we want
#a packet challenge first
hello["challenge"] = True
else:
hello.update(self.make_hello())
except InitExit as e:
log.error("error preparing connection:")
log.error(" %s", e)
self.quit(EXIT_INTERNAL_ERROR)
return
except Exception as e:
log.error("error preparing connection: %s", e, exc_info=True)
self.quit(EXIT_INTERNAL_ERROR)
return
if challenge_response:
assert self.password_file or os.environ.get('XPRA_PASSWORD')
hello["challenge_response"] = challenge_response
if client_salt:
hello["challenge_client_salt"] = client_salt
log("send_hello(%s) packet=%s", binascii.hexlify(strtobytes(challenge_response or "")), hello)
self.send("hello", hello)
def validate_backend(try_backend):
import binascii
from xpra.os_util import strtobytes
try_backend.init()
message = b"some message1234"
password = "******"
key_salt = DEFAULT_SALT
iterations = DEFAULT_ITERATIONS
block_size = DEFAULT_BLOCKSIZE
key = try_backend.get_key(password, key_salt, block_size, iterations)
log("validate_backend(%s) key=%s", try_backend, binascii.hexlify(key))
assert key is not None, "backend %s failed to generate a key" % try_backend
enc = try_backend.get_encryptor(key, DEFAULT_IV)
log("validate_backend(%s) encryptor=%s", try_backend, enc)
assert enc is not None, "backend %s failed to generate an encryptor" % enc
dec = try_backend.get_decryptor(key, DEFAULT_IV)
log("validate_backend(%s) decryptor=%s", try_backend, dec)
assert dec is not None, "backend %s failed to generate a decryptor" % enc
ev = enc.encrypt(message)
evs = binascii.hexlify(strtobytes(ev))
log("validate_backend(%s) encrypted(%s)=%s", try_backend, message, evs)
dv = dec.decrypt(ev)
log("validate_backend(%s) decrypted(%s)=%s", try_backend, evs, dv)
assert dv==message
log("validate_backend(%s) passed", try_backend)
def nasty_rgb_via_png_paint(self, cairo_format, has_alpha, img_data, x, y, width, height, rowstride, rgb_format):
log("nasty_rgb_via_png_paint%s", (cairo_format, has_alpha, len(img_data), x, y, width, height, rowstride, rgb_format))
#PIL fallback
PIL = get_codec("PIL")
if has_alpha:
oformat = "RGBA"
else:
oformat = "RGB"
#use frombytes rather than frombuffer to be compatible with python3 new-style buffers
#this is slower, but since this codepath is already dreadfully slow, we don't care
bdata = strtobytes(memoryview_to_bytes(img_data))
try:
img = PIL.Image.frombytes(oformat, (width,height), bdata, "raw", rgb_format.replace("X", "A"), rowstride, 1)
except ValueError as e:
raise Exception("failed to parse raw %s data to %s: %s" % (rgb_format, oformat, e))
#This is insane, the code below should work, but it doesn't:
# img_data = bytearray(img.tostring('raw', oformat, 0, 1))
# pixbuf = pixbuf_new_from_data(img_data, COLORSPACE_RGB, True, 8, width, height, rowstride)
# success = self.cairo_paint_pixbuf(pixbuf, x, y)
#So we still rountrip via PNG:
png = BytesIOClass()
img.save(png, format="PNG")
reader = BytesIOClass(png.getvalue())
png.close()
img = cairo.ImageSurface.create_from_png(reader)
self.cairo_paint_surface(img, x, y)
return True
def capsget(self, key, default=None):
v = self.get(key)
#py3k and bytes as keys...
if v is None and type(key)==str:
v = self.get(strtobytes(key), default)
if sys.version >= '3' and type(v)==bytes:
v = bytestostr(v)
return v
def get_default_systemd_run():
#don't use systemd-run on CentOS / RedHat
#(it causes failures with "Failed to create bus connection: No such file or directory")
from xpra.os_util import load_binary_file, strtobytes
data = strtobytes(load_binary_file("/etc/redhat-release") or "")
if data and (data.find(b"RedHat")>=0 or data.find(b"CentOS")>=0):
return "no"
return "auto"
def test_env(self):
for var_name in ("XPRA_PASSWORD", "SOME_OTHER_VAR_NAME"):
password = strtobytes(uuid.uuid4().hex)
os.environ[var_name] = password
try:
kwargs = {}
if var_name!="XPRA_PASSWORD":
kwargs["name"] = var_name
self._test_hmac_auth(env_auth, password, name=var_name)
finally:
del os.environ[var_name]
def check(self, str_value):
b = strtobytes(str_value)
assert b
s = bytestostr(b)
assert s
assert s==str_value
if not _memoryview:
return
mv = _memoryview(b)
mvb = memoryview_to_bytes(mv)
mvs = bytestostr(mvb)
assert mvs==str_value
def _add_chunks_to_queue(self,
chunks,
proto_flags,
start_send_cb=None,
end_send_cb=None):
""" the write_lock must be held when calling this function """
counter = 0
items = []
for index, level, data in chunks:
scb, ecb = None, None
#fire the start_send_callback just before the first packet is processed:
if counter == 0:
scb = start_send_cb
#fire the end_send callback when the last packet (index==0) makes it out:
if index == 0:
ecb = end_send_cb
payload_size = len(data)
actual_size = payload_size
if self.cipher_out:
proto_flags |= Protocol.FLAGS_CIPHER
#note: since we are padding: l!=len(data)
padding = (self.cipher_out_block_size -
len(data) % self.cipher_out_block_size) * " "
if len(padding) == 0:
padded = data
else:
padded = data + padding
actual_size = payload_size + len(padding)
assert len(padded) == actual_size
data = self.cipher_out.encrypt(padded)
assert len(data) == actual_size
log("sending %s bytes encrypted with %s padding", payload_size,
len(padding))
if proto_flags & Protocol.FLAGS_NOHEADER:
#for plain/text packets (ie: gibberish response)
items.append((data, scb, ecb))
elif pack_header_and_data is not None and actual_size < PACKET_JOIN_SIZE:
if type(data) == unicode:
data = str(data)
header_and_data = pack_header_and_data(
actual_size, proto_flags, level, index, payload_size, data)
items.append((header_and_data, scb, ecb))
else:
header = pack_header(proto_flags, level, index, payload_size)
items.append((header, scb, None))
items.append((strtobytes(data), None, ecb))
counter += 1
self._write_queue.put(items)
self.output_packetcount += 1
def init_client_mmap(token, mmap_group=None, socket_filename=None, size=128*1024*1024):
"""
Initializes an mmap area, writes the token in it and returns:
(success flag, mmap_area, mmap_size, temp_file, mmap_filename)
The caller must keep hold of temp_file to ensure it does not get deleted!
This is used by the client.
"""
if not can_use_mmap():
log.error("cannot use mmap: python version is too old?")
return False, None, 0, None, None
log("init_mmap(%s, %s, %s)", token, mmap_group, socket_filename)
try:
import mmap
import tempfile
from stat import S_IRUSR,S_IWUSR,S_IRGRP,S_IWGRP
mmap_dir = os.getenv("TMPDIR", "/tmp")
if not os.path.exists(mmap_dir):
raise Exception("TMPDIR %s does not exist!" % mmap_dir)
#create the mmap file, the mkstemp that is called via NamedTemporaryFile ensures
#that the file is readable and writable only by the creating user ID
temp = tempfile.NamedTemporaryFile(prefix="xpra.", suffix=".mmap", dir=mmap_dir)
#keep a reference to it so it does not disappear!
mmap_temp_file = temp
mmap_filename = temp.name
fd = temp.file.fileno()
#set the group permissions and gid if the mmap-group option is specified
if mmap_group and type(socket_filename)==str and os.path.exists(socket_filename):
s = os.stat(socket_filename)
os.fchown(fd, -1, s.st_gid)
os.fchmod(fd, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
assert size>=1024*1024, "mmap size is too small: %s (minimum is 1MB)" % to_std_unit(size)
assert size<=1024*1024*1024, "mmap is too big: %s (maximum is 1GB)" % to_std_unit(size)
unit = max(4096, mmap.PAGESIZE)
mmap_size = roundup(size + 8, unit)
log("using mmap file %s, fd=%s, size=%s", mmap_filename, fd, mmap_size)
SEEK_SET = 0 #os.SEEK_SET==0 but this is not available in python2.4
os.lseek(fd, mmap_size-1, SEEK_SET)
assert os.write(fd, strtobytes('\x00'))
os.lseek(fd, 0, SEEK_SET)
mmap_area = mmap.mmap(fd, length=mmap_size)
write_mmap_token(mmap_area, token)
return True, mmap_area, mmap_size, mmap_temp_file, mmap_filename
except Exception, e:
log.error("failed to setup mmap: %s", e, exc_info=True)
clean_mmap(mmap_filename)
return False, None, 0, None, None
def _add_chunks_to_queue(self, chunks, start_send_cb=None, end_send_cb=None):
""" the write_lock must be held when calling this function """
counter = 0
items = []
for proto_flags,index,level,data in chunks:
scb, ecb = None, None
#fire the start_send_callback just before the first packet is processed:
if counter==0:
scb = start_send_cb
#fire the end_send callback when the last packet (index==0) makes it out:
if index==0:
ecb = end_send_cb
payload_size = len(data)
actual_size = payload_size
if self.cipher_out:
proto_flags |= FLAGS_CIPHER
#note: since we are padding: l!=len(data)
padding_size = self.cipher_out_block_size - (payload_size % self.cipher_out_block_size)
if padding_size==0:
padded = data
else:
# pad byte value is number of padding bytes added
padded = data + pad(self.cipher_out_padding, padding_size)
actual_size += padding_size
assert len(padded)==actual_size, "expected padded size to be %i, but got %i" % (len(padded), actual_size)
data = self.cipher_out.encrypt(padded)
assert len(data)==actual_size, "expected encrypted size to be %i, but got %i" % (len(data), actual_size)
cryptolog("sending %s bytes %s encrypted with %s padding", payload_size, self.cipher_out_name, padding_size)
if proto_flags & FLAGS_NOHEADER:
assert not self.cipher_out
#for plain/text packets (ie: gibberish response)
log("sending %s bytes without header", payload_size)
items.append((data, scb, ecb))
elif actual_size<PACKET_JOIN_SIZE:
if type(data) not in JOIN_TYPES:
data = bytes(data)
header_and_data = pack_header(proto_flags, level, index, payload_size) + data
items.append((header_and_data, scb, ecb))
else:
header = pack_header(proto_flags, level, index, payload_size)
items.append((header, scb, None))
items.append((strtobytes(data), None, ecb))
counter += 1
self._write_queue.put(items)
self.output_packetcount += 1
def do_save(self, filename):
log("do_save(%s)", filename)
if not filename.lower().endswith(".zip"):
filename = filename+".zip"
basenoext, _ = os.path.splitext(os.path.basename(filename))
data = self.get_text_data()
import zipfile
zf = zipfile.ZipFile(filename, mode='w', compression=zipfile.ZIP_DEFLATED)
try:
for title, tooltip, dtype, s in data:
cfile = os.path.join(basenoext, title.replace(" ", "_")+"."+dtype)
info = zipfile.ZipInfo(cfile, date_time=time.localtime(time.time()))
info.compress_type = zipfile.ZIP_DEFLATED
#very poorly documented:
info.external_attr = 0o644 << 16
info.comment = strtobytes(tooltip)
zf.writestr(info, s)
finally:
zf.close()
def _cmp(o, r):
#our own deep compare function,
#ignores tuple vs list differences,
#and gives us a clue about where the problem is
if type(o)==type(r) and o==r:
return
if type(r) in (tuple, list) and type(o) in (tuple, list):
assert len(r)==len(o), "list/tuple differs in length: expected %s but got %s" % (o, r)
for i in range(len(r)):
_cmp(o[i], r[i])
return
if type(r)==dict and type(o)==dict:
for k,ov in o.items():
#with py3k, the key can end up being bytes instead of string...
rv = r.get(k, r.get(bytestostr(k), r.get(strtobytes(k))))
assert rv is not None, "restored dict is missing %s: %s" % (k, r)
_cmp(ov, rv)
return
import sys
if sys.version_info[0]<3 and type(o)==unicode and type(r)==str:
o = o.encode("utf-8")
elif type(o)==bytes and type(r)==str:
o = o.decode("utf-8")
elif type(o)==str and type(r)==bytes:
r = r.decode("utf-8")
if o==r:
return
print("")
print("original %s:" % type(o))
print("returned %s:" % type(r))
try:
print("original: %s" % binascii.hexlify(str(o)))
print("returned: %s" % binascii.hexlify(str(r)))
except:
pass
assert False, "value does not match: expected %s (%s) but got %s (%s)" % (o, type(o), r, type(r))
def run_server(error_cb,
opts,
mode,
xpra_file,
extra_args,
desktop_display=None):
try:
cwd = os.getcwd()
except:
cwd = os.path.expanduser("~")
warn("current working directory does not exist, using '%s'\n" % cwd)
validate_encryption(opts)
if opts.encoding == "help" or "help" in opts.encodings:
return show_encoding_help(opts)
from xpra.server.socket_util import parse_bind_tcp, parse_bind_vsock
bind_tcp = parse_bind_tcp(opts.bind_tcp)
bind_ssl = parse_bind_tcp(opts.bind_ssl)
bind_vsock = parse_bind_vsock(opts.bind_vsock)
assert mode in ("start", "start-desktop", "upgrade", "shadow", "proxy")
starting = mode == "start"
starting_desktop = mode == "start-desktop"
upgrading = mode == "upgrade"
shadowing = mode == "shadow"
proxying = mode == "proxy"
clobber = upgrading or opts.use_display
start_vfb = not shadowing and not proxying and not clobber
if upgrading or shadowing:
#there should already be one running
opts.pulseaudio = False
#get the display name:
if shadowing and len(extra_args) == 0:
if WIN32 or OSX:
#just a virtual name for the only display available:
display_name = ":0"
else:
from xpra.scripts.main import guess_X11_display
dotxpra = DotXpra(opts.socket_dir, opts.socket_dirs)
display_name = guess_X11_display(dotxpra)
elif upgrading and len(extra_args) == 0:
display_name = guess_xpra_display(opts.socket_dir, opts.socket_dirs)
else:
if len(extra_args) > 1:
error_cb(
"too many extra arguments (%i): only expected a display number"
% len(extra_args))
if len(extra_args) == 1:
display_name = extra_args[0]
if not shadowing and not proxying and not opts.use_display:
display_name_check(display_name)
else:
if proxying:
#find a free display number:
dotxpra = DotXpra(opts.socket_dir, opts.socket_dirs)
all_displays = dotxpra.sockets()
#ie: [("LIVE", ":100"), ("LIVE", ":200"), ...]
displays = [v[1] for v in all_displays]
display_name = None
for x in range(1000, 20000):
v = ":%s" % x
if v not in displays:
display_name = v
break
if not display_name:
error_cb(
"you must specify a free virtual display name to use with the proxy server"
)
elif opts.use_display:
#only use automatic guess for xpra displays and not X11 displays:
display_name = guess_xpra_display(opts.socket_dir,
opts.socket_dirs)
else:
# We will try to find one automaticaly
# Use the temporary magic value 'S' as marker:
display_name = 'S' + str(os.getpid())
if not shadowing and not proxying and not upgrading and opts.exit_with_children and not opts.start_child:
error_cb(
"--exit-with-children specified without any children to spawn; exiting immediately"
)
atexit.register(run_cleanups)
# Generate the script text now, because os.getcwd() will
# change if/when we daemonize:
from xpra.server.server_util import xpra_runner_shell_script, write_runner_shell_scripts, write_pidfile, find_log_dir
script = xpra_runner_shell_script(xpra_file, cwd, opts.socket_dir)
uid = int(opts.uid)
gid = int(opts.gid)
username = get_username_for_uid(uid)
home = get_home_for_uid(uid)
xauth_data = None
if start_vfb:
xauth_data = get_hex_uuid()
ROOT = POSIX and getuid() == 0
stdout = sys.stdout
stderr = sys.stderr
# Daemonize:
if POSIX and opts.daemon:
#daemonize will chdir to "/", so try to use an absolute path:
if opts.password_file:
opts.password_file = os.path.abspath(opts.password_file)
from xpra.server.server_util import daemonize
daemonize()
# if pam is present, try to create a new session:
pam = None
protected_fds = []
protected_env = {}
PAM_OPEN = POSIX and envbool("XPRA_PAM_OPEN", ROOT and uid != 0)
if PAM_OPEN:
try:
from xpra.server.pam import pam_session #@UnresolvedImport
except ImportError as e:
stderr.write("Error: failed to import pam module\n")
stderr.write(" %s" % e)
PAM_OPEN = False
if PAM_OPEN:
fdc = FDChangeCaptureContext()
with fdc:
pam = pam_session(username)
env = {
#"XDG_SEAT" : "seat1",
#"XDG_VTNR" : "0",
"XDG_SESSION_TYPE": "x11",
#"XDG_SESSION_CLASS" : "user",
"XDG_SESSION_DESKTOP": "xpra",
}
#maybe we should just bail out instead?
if pam.start():
pam.set_env(env)
items = {}
if display_name.startswith(":"):
items["XDISPLAY"] = display_name
if xauth_data:
items["XAUTHDATA"] = xauth_data
pam.set_items(items)
if pam.open():
#we can't close it, because we're not going to be root any more,
#but since we're the process leader for the session,
#terminating will also close the session
#add_cleanup(pam.close)
protected_env = pam.get_envlist()
os.environ.update(protected_env)
#closing the pam fd causes the session to be closed,
#and we don't want that!
protected_fds = fdc.get_new_fds()
xrd = create_runtime_dir(uid, gid)
if opts.pidfile:
write_pidfile(opts.pidfile, uid, gid)
if POSIX and not ROOT:
# Write out a shell-script so that we can start our proxy in a clean
# environment:
write_runner_shell_scripts(script)
if start_vfb or opts.daemon:
#we will probably need a log dir
#either for the vfb, or for our own log file
log_dir = opts.log_dir or ""
if not log_dir or log_dir.lower() == "auto":
log_dir = find_log_dir(username, uid=uid, gid=gid)
if not log_dir:
raise InitException(
"cannot find or create a logging directory")
#expose the log-dir as "XPRA_LOG_DIR",
#this is used by Xdummy for the Xorg log file
if "XPRA_LOG_DIR" not in os.environ:
os.environ["XPRA_LOG_DIR"] = log_dir
if opts.daemon:
from xpra.server.server_util import select_log_file, open_log_file, redirect_std_to_log
log_filename0 = select_log_file(log_dir, opts.log_file,
display_name)
logfd = open_log_file(log_filename0)
if ROOT and (uid > 0 or gid > 0):
try:
os.fchown(logfd, uid, gid)
except:
pass
stdout, stderr = redirect_std_to_log(logfd, *protected_fds)
stderr.write("Entering daemon mode; " +
"any further errors will be reported to:\n" +
(" %s\n" % log_filename0))
#warn early about this:
if (starting or starting_desktop) and desktop_display:
print_DE_warnings(desktop_display, opts.pulseaudio, opts.notifications,
opts.dbus_launch)
from xpra.log import Logger
log = Logger("server")
netlog = Logger("network")
mdns_recs = []
sockets = []
#SSL sockets:
wrap_socket_fn = None
need_ssl = False
ssl_opt = opts.ssl.lower()
if ssl_opt in TRUE_OPTIONS or bind_ssl:
need_ssl = True
if opts.bind_tcp:
if ssl_opt == "auto" and opts.ssl_cert:
need_ssl = True
elif ssl_opt == "tcp":
need_ssl = True
elif ssl_opt == "www":
need_ssl = True
if need_ssl:
from xpra.scripts.main import ssl_wrap_socket_fn
try:
wrap_socket_fn = ssl_wrap_socket_fn(opts, server_side=True)
netlog("wrap_socket_fn=%s", wrap_socket_fn)
except Exception as e:
netlog("SSL error", exc_info=True)
cpaths = csv("'%s'" % x for x in (opts.ssl_cert, opts.ssl_key)
if x)
raise InitException(
"cannot create SSL socket, check your certificate paths (%s): %s"
% (cpaths, e))
from xpra.server.socket_util import setup_tcp_socket, setup_vsock_socket, setup_local_sockets
min_port = int(opts.min_port)
netlog("setting up SSL sockets: %s", bind_ssl)
for host, iport in bind_ssl:
if iport < min_port:
error_cb("invalid %s port number %i (minimum value is %i)" %
(socktype, iport, min_port))
_, tcp_socket, host_port = setup_tcp_socket(host, iport, "SSL")
socket = ("SSL", wrap_socket_fn(tcp_socket), host_port)
sockets.append(socket)
rec = "ssl", [(host, iport)]
netlog("%s : %s", rec, socket)
mdns_recs.append(rec)
# Initialize the TCP sockets before the display,
# That way, errors won't make us kill the Xvfb
# (which may not be ours to kill at that point)
tcp_ssl = ssl_opt in TRUE_OPTIONS or (ssl_opt == "auto" and opts.ssl_cert)
def add_tcp_mdns_rec(host, iport):
rec = "tcp", [(host, iport)]
netlog("%s : %s", rec, socket)
mdns_recs.append(rec)
if tcp_ssl:
#SSL is also available on this TCP socket:
rec = "ssl", [(host, iport)]
netlog("%s : %s", rec, socket)
mdns_recs.append(rec)
netlog("setting up TCP sockets: %s", bind_tcp)
for host, iport in bind_tcp:
if iport < min_port:
error_cb("invalid %s port number %i (minimum value is %i)" %
(socktype, iport, min_port))
socket = setup_tcp_socket(host, iport)
sockets.append(socket)
add_tcp_mdns_rec(host, iport)
# VSOCK:
netlog("setting up vsock sockets: %s", bind_vsock)
for cid, iport in bind_vsock:
socket = setup_vsock_socket(cid, iport)
sockets.append(socket)
rec = "vsock", [("", iport)]
netlog("%s : %s", rec, socket)
mdns_recs.append(rec)
# systemd socket activation:
try:
from xpra.server.sd_listen import get_sd_listen_sockets
except ImportError:
pass
else:
sd_sockets = get_sd_listen_sockets()
netlog("systemd sockets: %s", sd_sockets)
for stype, socket, addr in sd_sockets:
sockets.append((stype, socket, addr))
netlog("%s : %s", (stype, [addr]), socket)
if stype == "tcp":
host, iport = addr
add_tcp_mdns_rec(host, iport)
sanitize_env()
if POSIX:
if xrd:
os.environ["XDG_RUNTIME_DIR"] = xrd
os.environ["XDG_SESSION_TYPE"] = "x11"
if not starting_desktop:
os.environ["XDG_CURRENT_DESKTOP"] = opts.wm_name
configure_imsettings_env(opts.input_method)
if display_name[0] != 'S':
os.environ["DISPLAY"] = display_name
os.environ["CKCON_X11_DISPLAY"] = display_name
else:
try:
del os.environ["DISPLAY"]
except:
pass
os.environ.update(protected_env)
log("env=%s", os.environ)
# Start the Xvfb server first to get the display_name if needed
from xpra.server.vfb_util import start_Xvfb, check_xvfb_process, verify_display_ready, verify_gdk_display, set_initial_resolution
odisplay_name = display_name
xvfb = None
xvfb_pid = None
if start_vfb:
assert not proxying and xauth_data
pixel_depth = validate_pixel_depth(opts.pixel_depth)
xvfb, display_name = start_Xvfb(opts.xvfb, pixel_depth, display_name,
cwd, uid, gid, xauth_data)
xvfb_pid = xvfb.pid
#always update as we may now have the "real" display name:
os.environ["DISPLAY"] = display_name
os.environ["CKCON_X11_DISPLAY"] = display_name
os.environ.update(protected_env)
if display_name != odisplay_name and pam:
pam.set_items({"XDISPLAY": display_name})
close_display = None
if not proxying:
def close_display():
# Close our display(s) first, so the server dying won't kill us.
# (if gtk has been loaded)
gtk_mod = sys.modules.get("gtk")
if gtk_mod:
for d in gtk_mod.gdk.display_manager_get().list_displays():
d.close()
if xvfb_pid:
log.info("killing xvfb with pid %s", xvfb_pid)
try:
os.kill(xvfb_pid, signal.SIGTERM)
except OSError as e:
log.info("failed to kill xvfb process with pid %s:",
xvfb_pid)
log.info(" %s", e)
add_cleanup(close_display)
if opts.daemon:
def noerr(fn, *args):
try:
fn(*args)
except:
pass
log_filename1 = select_log_file(log_dir, opts.log_file, display_name)
if log_filename0 != log_filename1:
# we now have the correct log filename, so use it:
os.rename(log_filename0, log_filename1)
if odisplay_name != display_name:
#this may be used by scripts, let's try not to change it:
noerr(stderr.write, "Actual display used: %s\n" % display_name)
noerr(stderr.write,
"Actual log file name is now: %s\n" % log_filename1)
noerr(stderr.flush)
noerr(stdout.close)
noerr(stderr.close)
#we should not be using stdout or stderr from this point:
del stdout
del stderr
if not check_xvfb_process(xvfb):
#xvfb problem: exit now
return 1
if ROOT and (uid != 0 or gid != 0):
log("root: switching to uid=%i, gid=%i", uid, gid)
setuidgid(uid, gid)
os.environ.update({
"HOME": home,
"USER": username,
"LOGNAME": username,
})
shell = get_shell_for_uid(uid)
if shell:
os.environ["SHELL"] = shell
os.environ.update(protected_env)
if opts.chdir:
os.chdir(opts.chdir)
display = None
if not proxying:
no_gtk()
if POSIX and (starting or starting_desktop or shadowing):
#check that we can access the X11 display:
if not verify_display_ready(xvfb, display_name, shadowing):
return 1
display = verify_gdk_display(display_name)
if not display:
return 1
import gtk #@Reimport
assert gtk
#on win32, this ensures that we get the correct screen size to shadow:
from xpra.platform.gui import init as gui_init
gui_init()
#setup unix domain socket:
if not opts.socket_dir and not opts.socket_dirs:
#we always need at least one valid socket dir
from xpra.platform.paths import get_socket_dirs
opts.socket_dirs = get_socket_dirs()
local_sockets = setup_local_sockets(opts.bind, opts.socket_dir,
opts.socket_dirs, display_name,
clobber, opts.mmap_group,
opts.socket_permissions, username, uid,
gid)
netlog("setting up local sockets: %s", local_sockets)
for rec, cleanup_socket in local_sockets:
socktype, socket, sockpath = rec
#ie: ("unix-domain", sock, sockpath), cleanup_socket
sockets.append(rec)
netlog("%s : %s", (socktype, [sockpath]), socket)
add_cleanup(cleanup_socket)
if opts.mdns:
ssh_port = get_ssh_port()
rec = "ssh", [("", ssh_port)]
netlog("%s : %s", rec, socket)
if ssh_port and rec not in mdns_recs:
mdns_recs.append(rec)
kill_dbus = None
if shadowing:
from xpra.platform.shadow_server import ShadowServer
app = ShadowServer()
server_type_info = "shadow"
elif proxying:
from xpra.server.proxy.proxy_server import ProxyServer
app = ProxyServer()
server_type_info = "proxy"
else:
assert starting or starting_desktop or upgrading
from xpra.x11.gtk2.gdk_display_source import init_gdk_display_source
init_gdk_display_source()
#(now we can access the X11 server)
if xvfb_pid is not None:
#save the new pid (we should have one):
save_xvfb_pid(xvfb_pid)
if POSIX:
dbus_pid = -1
dbus_env = {}
if clobber:
#get the saved pids and env
dbus_pid = get_dbus_pid()
dbus_env = get_dbus_env()
log("retrieved existing dbus attributes")
else:
assert starting or starting_desktop
if xvfb_pid is not None:
#save the new pid (we should have one):
save_xvfb_pid(xvfb_pid)
bus_address = protected_env.get("DBUS_SESSION_BUS_ADDRESS")
log("dbus_launch=%s, current DBUS_SESSION_BUS_ADDRESS=%s",
opts.dbus_launch, bus_address)
if opts.dbus_launch and not bus_address:
#start a dbus server:
def kill_dbus():
log("kill_dbus: dbus_pid=%s" % dbus_pid)
if dbus_pid <= 0:
return
try:
os.kill(dbus_pid, signal.SIGINT)
except Exception as e:
log.warn(
"Warning: error trying to stop dbus with pid %i:",
dbus_pid)
log.warn(" %s", e)
add_cleanup(kill_dbus)
#this also updates os.environ with the dbus attributes:
dbus_pid, dbus_env = start_dbus(opts.dbus_launch)
if dbus_pid > 0:
save_dbus_pid(dbus_pid)
if dbus_env:
save_dbus_env(dbus_env)
log("dbus attributes: pid=%s, env=%s", dbus_pid, dbus_env)
if dbus_env:
os.environ.update(dbus_env)
os.environ.update(protected_env)
log("env=%s", os.environ)
try:
# This import is delayed because the module depends on gtk:
from xpra.x11.bindings.window_bindings import X11WindowBindings
X11Window = X11WindowBindings()
if (starting or
starting_desktop) and not clobber and opts.resize_display:
set_initial_resolution(starting_desktop)
except ImportError as e:
log.error(
"Failed to load Xpra server components, check your installation: %s"
% e)
return 1
if starting or upgrading:
if not X11Window.displayHasXComposite():
log.error(
"Xpra 'start' subcommand runs as a compositing manager")
log.error(
" it cannot use a display which lacks the XComposite extension!"
)
return 1
if starting:
#check for an existing window manager:
from xpra.x11.gtk2.wm import wm_check
if not wm_check(display, opts.wm_name, upgrading):
return 1
log("XShape=%s", X11Window.displayHasXShape())
from xpra.x11.server import XpraServer
app = XpraServer(clobber)
server_type_info = "xpra"
else:
assert starting_desktop
from xpra.x11.desktop_server import XpraDesktopServer
app = XpraDesktopServer()
server_type_info = "xpra desktop"
#publish mdns records:
if opts.mdns:
from xpra.os_util import strtobytes
from xpra.platform.info import get_username
from xpra.server.socket_util import mdns_publish
mdns_info = {
"display": display_name,
"username": get_username(),
"uuid": strtobytes(app.uuid),
"platform": sys.platform,
"type": {
"xpra": "seamless",
"xpra desktop": "desktop"
}.get(server_type_info, server_type_info),
}
if opts.session_name:
mdns_info["session"] = opts.session_name
for mode, listen_on in mdns_recs:
mdns_publish(display_name, mode, listen_on, mdns_info)
try:
app._ssl_wrap_socket = wrap_socket_fn
app.original_desktop_display = desktop_display
app.exec_cwd = opts.chdir or cwd
app.init(opts)
app.init_components(opts)
except InitException as e:
log.error("xpra server initialization error:")
log.error(" %s", e)
return 1
except Exception as e:
log.error("Error: cannot start the %s server",
server_type_info,
exc_info=True)
log.error(str(e))
log.info("")
return 1
#honour start child, html webserver, and setup child reaper
if not proxying and not upgrading:
if opts.exit_with_children:
assert opts.start_child, "exit-with-children was specified but start-child is missing!"
app.start_commands = opts.start
app.start_child_commands = opts.start_child
app.start_after_connect = opts.start_after_connect
app.start_child_after_connect = opts.start_child_after_connect
app.start_on_connect = opts.start_on_connect
app.start_child_on_connect = opts.start_child_on_connect
app.exec_start_commands()
del opts
log("%s(%s)", app.init_sockets, sockets)
app.init_sockets(sockets)
log("%s(%s)", app.init_when_ready, _when_ready)
app.init_when_ready(_when_ready)
try:
#from here on, we own the vfb, even if we inherited one:
if (starting or starting_desktop or upgrading) and clobber:
#and it will be killed if exit cleanly:
xvfb_pid = get_xvfb_pid()
log("running %s", app.run)
e = app.run()
log("%s()=%s", app.run, e)
except KeyboardInterrupt:
log.info("stopping on KeyboardInterrupt")
e = 0
except Exception as e:
log.error("server error", exc_info=True)
e = -128
if e > 0:
# Upgrading/exiting, so leave X and dbus servers running
if close_display:
_cleanups.remove(close_display)
if kill_dbus:
_cleanups.remove(kill_dbus)
from xpra.server.server_core import ServerCore
if e == ServerCore.EXITING_CODE:
log.info("exiting: not cleaning up Xvfb")
else:
log.info("upgrading: not cleaning up Xvfb")
log("cleanups=%s", _cleanups)
e = 0
return e
def get_password(self):
file_data = self.load_password_file()
if file_data is None:
return None
return strtobytes(file_data)
def _process_challenge(self, packet):
authlog("processing challenge: %s", packet[1:])
def warn_server_and_exit(code,
message,
server_message="authentication failed"):
authlog.error("Error: authentication failed:")
authlog.error(" %s", message)
self.disconnect_and_quit(code, server_message)
if not self.has_password():
warn_server_and_exit(
EXIT_PASSWORD_REQUIRED,
"this server requires authentication, please provide a password",
"no password available")
return
password = self.load_password()
if not password:
warn_server_and_exit(
EXIT_PASSWORD_FILE_ERROR,
"failed to load password from file %s" % self.password_file,
"no password available")
return
salt = packet[1]
if self.encryption:
assert len(
packet
) >= 3, "challenge does not contain encryption details to use for the response"
server_cipher = typedict(packet[2])
key = self.get_encryption_key()
if key is None:
warn_server_and_exit(EXIT_ENCRYPTION,
"the server does not use any encryption",
"client requires encryption")
return
if not self.set_server_encryption(server_cipher, key):
return
#all server versions support a client salt,
#they also tell us which digest to use:
digest = packet[3]
client_salt = get_salt(len(salt))
#TODO: use some key stretching algorigthm? (meh)
salt = xor(salt, client_salt)
if digest == b"hmac":
import hmac, hashlib
password = strtobytes(password)
salt = strtobytes(salt)
challenge_response = hmac.HMAC(password,
salt,
digestmod=hashlib.md5).hexdigest()
elif digest == b"xor":
#don't send XORed password unencrypted:
encrypted = self._protocol.cipher_out or self._protocol.get_info(
).get("type") == "ssl"
if not encrypted and not ALLOW_UNENCRYPTED_PASSWORDS:
warn_server_and_exit(
EXIT_ENCRYPTION,
"server requested digest %s, cowardly refusing to use it without encryption"
% digest, "invalid digest")
return
salt = salt[:len(password)]
challenge_response = strtobytes(xor(password, salt))
else:
warn_server_and_exit(
EXIT_PASSWORD_REQUIRED,
"server requested an unsupported digest: %s" % digest,
"invalid digest")
return
if digest:
authlog("%s(%s, %s)=%s", digest, binascii.hexlify(password),
binascii.hexlify(salt), challenge_response)
self.password_sent = True
self.remove_packet_handlers("challenge")
self.send_hello(challenge_response, client_salt)
def get_auth_info(self):
self.load_password_file()
if not self.password_filedata:
return None
return self.password_filedata.get(strtobytes(self.username))
def process_server_packet(self, proto, packet):
packet_type = packet[0]
log("process_server_packet: %s", packet_type)
if packet_type==Protocol.CONNECTION_LOST:
self.stop("server connection lost", proto)
return
elif packet_type=="disconnect":
log("got disconnect from server: %s", packet[1])
if self.exit:
self.server_protocol.close()
else:
self.stop("disconnect from server: %s" % packet[1])
elif packet_type=="hello":
c = typedict(packet[1])
maxw, maxh = c.intpair("max_desktop_size", (4096, 4096))
caps = self.filter_server_caps(c)
#add new encryption caps:
if self.cipher:
from xpra.net.crypto import crypto_backend_init, new_cipher_caps, DEFAULT_PADDING
crypto_backend_init()
padding_options = self.caps.strlistget("cipher.padding.options", [DEFAULT_PADDING])
auth_caps = new_cipher_caps(self.client_protocol, self.cipher, self.encryption_key, padding_options)
caps.update(auth_caps)
#may need to bump packet size:
proto.max_packet_size = maxw*maxh*4*4
file_transfer = self.caps.boolget("file-transfer") and c.boolget("file-transfer")
file_size_limit = max(self.caps.intget("file-size-limit"), c.intget("file-size-limit"))
file_max_packet_size = int(file_transfer) * (1024 + file_size_limit*1024*1024)
self.client_protocol.max_packet_size = max(self.client_protocol.max_packet_size, file_max_packet_size)
self.server_protocol.max_packet_size = max(self.server_protocol.max_packet_size, file_max_packet_size)
packet = ("hello", caps)
elif packet_type=="info-response":
#adds proxy info:
#note: this is only seen by the client application
#"xpra info" is a new connection, which talks to the proxy server...
info = packet[1]
info.update(self.get_proxy_info(proto))
elif packet_type=="lost-window":
wid = packet[1]
#mark it as lost so we can drop any current/pending frames
self.lost_windows.add(wid)
#queue it so it gets cleaned safely (for video encoders mostly):
self.encode_queue.put(packet)
#and fall through so tell the client immediately
elif packet_type=="draw":
#use encoder thread:
self.encode_queue.put(packet)
#which will queue the packet itself when done:
return
#we do want to reformat cursor packets...
#as they will have been uncompressed by the network layer already:
elif packet_type=="cursor":
#packet = ["cursor", x, y, width, height, xhot, yhot, serial, pixels, name]
#or:
#packet = ["cursor", "png", x, y, width, height, xhot, yhot, serial, pixels, name]
#or:
#packet = ["cursor", ""]
if len(packet)>=8:
#hard to distinguish png cursors from normal cursors...
try:
int(packet[1])
self._packet_recompress(packet, 8, "cursor")
except:
self._packet_recompress(packet, 9, "cursor")
elif packet_type=="window-icon":
self._packet_recompress(packet, 5, "icon")
elif packet_type=="send-file":
if packet[6]:
packet[6] = Compressed("file-data", packet[6])
elif packet_type=="send-file-chunk":
if packet[3]:
packet[3] = Compressed("file-chunk-data", packet[3])
elif packet_type=="challenge":
from xpra.net.crypto import get_salt
#client may have already responded to the challenge,
#so we have to handle authentication from this end
salt = packet[1]
digest = packet[3]
client_salt = get_salt(len(salt))
salt = xor_str(salt, client_salt)
if digest!=b"hmac":
self.stop("digest mode '%s' not supported", std(digest))
return
password = self.session_options.get("password")
if not password:
self.stop("authentication requested by the server, but no password available for this session")
return
import hmac, hashlib
password = strtobytes(password)
salt = strtobytes(salt)
challenge_response = hmac.HMAC(password, salt, digestmod=hashlib.md5).hexdigest()
log.info("sending %s challenge response", digest)
self.send_hello(challenge_response, client_salt)
return
self.queue_client_packet(packet)
def _process_send_file_chunk(self, packet):
chunk_id, chunk, file_data, has_more = packet[1:5]
chunk_id = net_utf8(chunk_id)
filelog("_process_send_file_chunk%s", (chunk_id, chunk, "%i bytes" % len(file_data), has_more))
chunk_state = self.receive_chunks_in_progress.get(chunk_id)
if not chunk_state:
filelog.error("Error: cannot find the file transfer id '%r'", chunk_id)
self.cancel_file(chunk_id, "file transfer id %r not found" % chunk_id, chunk)
return
if chunk_state[-4]:
filelog("got chunk for a cancelled file transfer, ignoring it")
return
def progress(position, error=None):
start = chunk_state[0]
send_id = chunk_state[-3]
filesize = chunk_state[6]
self.transfer_progress_update(False, send_id, monotonic()-start, position, filesize, error)
fd = chunk_state[1]
if chunk_state[-1]+1!=chunk:
filelog.error("Error: chunk number mismatch, expected %i but got %i", chunk_state[-1]+1, chunk)
self.cancel_file(chunk_id, "chunk number mismatch", chunk)
osclose(fd)
progress(-1, "chunk no mismatch")
return
file_data = strtobytes(file_data)
#update chunk number:
chunk_state[-1] = chunk
digest = chunk_state[8]
written = chunk_state[9]
try:
os.write(fd, file_data)
digest.update(file_data)
written += len(file_data)
chunk_state[9] = written
except OSError as e:
filelog.error("Error: cannot write file chunk")
filelog.error(" %s", e)
self.cancel_file(chunk_id, "write error: %s" % e, chunk)
osclose(fd)
progress(-1, "write error (%s)" % e)
return
self.send("ack-file-chunk", chunk_id, True, "", chunk)
if has_more:
progress(written)
timer = chunk_state[-2]
if timer:
self.source_remove(timer)
#remote end will send more after receiving the ack
timer = self.timeout_add(CHUNK_TIMEOUT, self._check_chunk_receiving, chunk_id, chunk)
chunk_state[-2] = timer
return
self.receive_chunks_in_progress.pop(chunk_id, None)
osclose(fd)
#check file size and digest then process it:
filename, mimetype, printit, openit, filesize, options = chunk_state[2:8]
if written!=filesize:
filelog.error("Error: expected a file of %i bytes, got %i", filesize, written)
progress(-1, "file size mismatch")
return
expected_digest = options.strget("sha1")
if expected_digest and digest.hexdigest()!=expected_digest:
progress(-1, "checksum mismatch")
self.digest_mismatch(filename, digest, expected_digest, "sha1")
return
progress(written)
start_time = chunk_state[0]
elapsed = monotonic()-start_time
mimetype = bytestostr(mimetype)
filelog("%i bytes received in %i chunks, took %ims", filesize, chunk, elapsed*1000)
self.process_downloaded_file(filename, mimetype, printit, openit, filesize, options)
def capsget(self, capabilities, key, default):
v = capabilities.get(strtobytes(key), default)
if sys.version >= '3' and type(v) == bytes:
v = bytestostr(v)
return v
def run_server(error_cb,
opts,
mode,
xpra_file,
extra_args,
desktop_display=None):
try:
cwd = os.getcwd()
except:
cwd = os.path.expanduser("~")
warn("current working directory does not exist, using '%s'\n" % cwd)
validate_encryption(opts)
if opts.encoding == "help" or "help" in opts.encodings:
return show_encoding_help(opts)
from xpra.server.socket_util import parse_bind_ip, parse_bind_vsock, get_network_logger
bind_tcp = parse_bind_ip(opts.bind_tcp)
bind_udp = parse_bind_ip(opts.bind_udp)
bind_ssl = parse_bind_ip(opts.bind_ssl)
bind_ws = parse_bind_ip(opts.bind_ws)
bind_wss = parse_bind_ip(opts.bind_wss)
bind_rfb = parse_bind_ip(opts.bind_rfb, 5900)
bind_vsock = parse_bind_vsock(opts.bind_vsock)
assert mode in ("start", "start-desktop", "upgrade", "shadow", "proxy")
starting = mode == "start"
starting_desktop = mode == "start-desktop"
upgrading = mode == "upgrade"
shadowing = mode == "shadow"
proxying = mode == "proxy"
clobber = upgrading or opts.use_display
start_vfb = not shadowing and not proxying and not clobber
if upgrading or shadowing:
#there should already be one running
opts.pulseaudio = False
#get the display name:
if shadowing and len(extra_args) == 0:
if WIN32 or OSX:
#just a virtual name for the only display available:
display_name = ":0"
else:
from xpra.scripts.main import guess_X11_display
dotxpra = DotXpra(opts.socket_dir, opts.socket_dirs)
display_name = guess_X11_display(dotxpra, desktop_display)
elif upgrading and len(extra_args) == 0:
display_name = guess_xpra_display(opts.socket_dir, opts.socket_dirs)
else:
if len(extra_args) > 1:
error_cb(
"too many extra arguments (%i): only expected a display number"
% len(extra_args))
if len(extra_args) == 1:
display_name = extra_args[0]
if not shadowing and not proxying and not opts.use_display:
display_name_check(display_name)
else:
if proxying:
#find a free display number:
dotxpra = DotXpra(opts.socket_dir, opts.socket_dirs)
all_displays = dotxpra.sockets()
#ie: [("LIVE", ":100"), ("LIVE", ":200"), ...]
displays = [v[1] for v in all_displays]
display_name = None
for x in range(1000, 20000):
v = ":%s" % x
if v not in displays:
display_name = v
break
if not display_name:
error_cb(
"you must specify a free virtual display name to use with the proxy server"
)
elif opts.use_display:
#only use automatic guess for xpra displays and not X11 displays:
display_name = guess_xpra_display(opts.socket_dir,
opts.socket_dirs)
else:
# We will try to find one automaticaly
# Use the temporary magic value 'S' as marker:
display_name = 'S' + str(os.getpid())
if not shadowing and not proxying and not upgrading and opts.exit_with_children and not opts.start_child:
error_cb(
"--exit-with-children specified without any children to spawn; exiting immediately"
)
atexit.register(run_cleanups)
# Generate the script text now, because os.getcwd() will
# change if/when we daemonize:
from xpra.server.server_util import xpra_runner_shell_script, write_runner_shell_scripts, write_pidfile, find_log_dir, create_input_devices
script = xpra_runner_shell_script(xpra_file, cwd, opts.socket_dir)
uid = int(opts.uid)
gid = int(opts.gid)
username = get_username_for_uid(uid)
home = get_home_for_uid(uid)
xauth_data = None
if start_vfb:
xauth_data = get_hex_uuid()
ROOT = POSIX and getuid() == 0
protected_fds = []
protected_env = {}
stdout = sys.stdout
stderr = sys.stderr
# Daemonize:
if POSIX and opts.daemon:
#daemonize will chdir to "/", so try to use an absolute path:
if opts.password_file:
opts.password_file = tuple(
os.path.abspath(x) for x in opts.password_file)
from xpra.server.server_util import daemonize
daemonize()
displayfd = 0
if POSIX and opts.displayfd:
try:
displayfd = int(opts.displayfd)
if displayfd > 0:
protected_fds.append(displayfd)
except ValueError as e:
stderr.write("Error: invalid displayfd '%s':\n" % opts.displayfd)
stderr.write(" %s\n" % e)
del e
# if pam is present, try to create a new session:
pam = None
PAM_OPEN = POSIX and envbool("XPRA_PAM_OPEN", ROOT and uid != 0)
if PAM_OPEN:
try:
from xpra.server.pam import pam_session #@UnresolvedImport
except ImportError as e:
stderr.write("Error: failed to import pam module\n")
stderr.write(" %s" % e)
del e
PAM_OPEN = False
if PAM_OPEN:
fdc = FDChangeCaptureContext()
with fdc:
pam = pam_session(username)
env = {
#"XDG_SEAT" : "seat1",
#"XDG_VTNR" : "0",
"XDG_SESSION_TYPE": "x11",
#"XDG_SESSION_CLASS" : "user",
"XDG_SESSION_DESKTOP": "xpra",
}
#maybe we should just bail out instead?
if pam.start():
pam.set_env(env)
items = {}
if display_name.startswith(":"):
items["XDISPLAY"] = display_name
if xauth_data:
items["XAUTHDATA"] = xauth_data
pam.set_items(items)
if pam.open():
#we can't close it, because we're not going to be root any more,
#but since we're the process leader for the session,
#terminating will also close the session
#add_cleanup(pam.close)
protected_env = pam.get_envlist()
os.environ.update(protected_env)
#closing the pam fd causes the session to be closed,
#and we don't want that!
protected_fds += fdc.get_new_fds()
#get XDG_RUNTIME_DIR from env options,
#which may not be have updated os.environ yet when running as root with "--uid="
xrd = os.path.abspath(parse_env(opts.env).get("XDG_RUNTIME_DIR", ""))
if ROOT and (uid > 0 or gid > 0):
#we're going to chown the directory if we create it,
#ensure this cannot be abused, only use "safe" paths:
if not any(x for x in ("/run/user/%i" % uid, "/tmp", "/var/tmp")
if xrd.startswith(x)):
xrd = ""
#these paths could cause problems if we were to create and chown them:
if xrd.startswith("/tmp/.X11-unix") or xrd.startswith(
"/tmp/.XIM-unix"):
xrd = ""
if not xrd:
xrd = os.environ.get("XDG_RUNTIME_DIR")
xrd = create_runtime_dir(xrd, uid, gid)
if xrd:
#this may override the value we get from pam
#with the value supplied by the user:
protected_env["XDG_RUNTIME_DIR"] = xrd
if opts.pidfile:
write_pidfile(opts.pidfile, uid, gid)
if POSIX and not ROOT:
# Write out a shell-script so that we can start our proxy in a clean
# environment:
write_runner_shell_scripts(script)
if start_vfb or opts.daemon:
#we will probably need a log dir
#either for the vfb, or for our own log file
log_dir = opts.log_dir or ""
if not log_dir or log_dir.lower() == "auto":
log_dir = find_log_dir(username, uid=uid, gid=gid)
if not log_dir:
raise InitException(
"cannot find or create a logging directory")
#expose the log-dir as "XPRA_LOG_DIR",
#this is used by Xdummy for the Xorg log file
if "XPRA_LOG_DIR" not in os.environ:
os.environ["XPRA_LOG_DIR"] = log_dir
if opts.daemon:
from xpra.server.server_util import select_log_file, open_log_file, redirect_std_to_log
log_filename0 = osexpand(
select_log_file(log_dir, opts.log_file, display_name),
username, uid, gid)
logfd = open_log_file(log_filename0)
if ROOT and (uid > 0 or gid > 0):
try:
os.fchown(logfd, uid, gid)
except:
pass
stdout, stderr = redirect_std_to_log(logfd, *protected_fds)
try:
stderr.write("Entering daemon mode; " +
"any further errors will be reported to:\n" +
(" %s\n" % log_filename0))
except:
#we tried our best, logging another error won't help
pass
#warn early about this:
if (starting or starting_desktop
) and desktop_display and opts.notifications and not opts.dbus_launch:
print_DE_warnings()
log = get_util_logger()
netlog = get_network_logger()
mdns_recs = {}
sockets = []
#SSL sockets:
wrap_socket_fn = None
need_ssl = False
ssl_opt = opts.ssl.lower()
if ssl_opt in TRUE_OPTIONS or bind_ssl or bind_wss:
need_ssl = True
if opts.bind_tcp or opts.bind_ws:
if ssl_opt == "auto" and opts.ssl_cert:
need_ssl = True
elif ssl_opt == "tcp" and opts.bind_tcp:
need_ssl = True
elif ssl_opt == "www":
need_ssl = True
if need_ssl:
from xpra.scripts.main import ssl_wrap_socket_fn
try:
wrap_socket_fn = ssl_wrap_socket_fn(opts, server_side=True)
netlog("wrap_socket_fn=%s", wrap_socket_fn)
except Exception as e:
netlog("SSL error", exc_info=True)
cpaths = csv("'%s'" % x for x in (opts.ssl_cert, opts.ssl_key)
if x)
raise InitException(
"cannot create SSL socket, check your certificate paths (%s): %s"
% (cpaths, e))
from xpra.server.socket_util import setup_tcp_socket, setup_udp_socket, setup_vsock_socket, setup_local_sockets, has_dual_stack
min_port = int(opts.min_port)
def hosts(host_str):
if host_str == "*":
if has_dual_stack():
#IPv6 will also listen for IPv4:
return ["::"]
#no dual stack, so we have to listen on both IPv4 and IPv6 explicitly:
return ["0.0.0.0", "::"]
return [host_str]
def add_mdns(socktype, host_str, port):
recs = mdns_recs.setdefault(socktype.lower(), [])
for host in hosts(host_str):
rec = (host, port)
if rec not in recs:
recs.append(rec)
def add_tcp_socket(socktype, host_str, iport):
if iport < min_port:
error_cb("invalid %s port number %i (minimum value is %i)" %
(socktype, iport, min_port))
for host in hosts(host_str):
socket = setup_tcp_socket(host, iport, socktype)
sockets.append(socket)
add_mdns(socktype, host, iport)
def add_udp_socket(socktype, host_str, iport):
if iport < min_port:
error_cb("invalid %s port number %i (minimum value is %i)" %
(socktype, iport, min_port))
for host in hosts(host_str):
socket = setup_udp_socket(host, iport, socktype)
sockets.append(socket)
add_mdns(socktype, host, iport)
# Initialize the TCP sockets before the display,
# That way, errors won't make us kill the Xvfb
# (which may not be ours to kill at that point)
ws_upgrades = opts.html and (os.path.isabs(opts.html) or opts.html.lower()
in TRUE_OPTIONS + ["auto"])
netlog("setting up SSL sockets: %s", csv(bind_ssl))
for host, iport in bind_ssl:
add_tcp_socket("ssl", host, iport)
if ws_upgrades:
add_tcp_socket("wss", host, iport)
netlog("setting up https / wss (secure websockets): %s", csv(bind_wss))
for host, iport in bind_wss:
add_tcp_socket("wss", host, iport)
tcp_ssl = ssl_opt in TRUE_OPTIONS or (ssl_opt == "auto" and opts.ssl_cert)
netlog("setting up TCP sockets: %s", csv(bind_tcp))
for host, iport in bind_tcp:
add_tcp_socket("tcp", host, iport)
if tcp_ssl:
add_mdns("ssl", host, iport)
if ws_upgrades:
add_mdns("ws", host, iport)
if ws_upgrades and tcp_ssl:
add_mdns("wss", host, iport)
netlog("setting up UDP sockets: %s", csv(bind_udp))
for host, iport in bind_udp:
add_udp_socket("udp", host, iport)
netlog("setting up http / ws (websockets): %s", csv(bind_ws))
for host, iport in bind_ws:
add_tcp_socket("ws", host, iport)
if tcp_ssl:
add_mdns("wss", host, iport)
if bind_rfb and (proxying or starting):
log.warn("Warning: bind-rfb sockets cannot be used with '%s' mode" %
mode)
else:
netlog("setting up rfb sockets: %s", csv(bind_rfb))
for host, iport in bind_rfb:
add_tcp_socket("rfb", host, iport)
netlog("setting up vsock sockets: %s", csv(bind_vsock))
for cid, iport in bind_vsock:
socket = setup_vsock_socket(cid, iport)
sockets.append(socket)
#add_mdns("vsock", str(cid), iport)
# systemd socket activation:
try:
from xpra.platform.xposix.sd_listen import get_sd_listen_sockets
except ImportError:
pass
else:
sd_sockets = get_sd_listen_sockets()
netlog("systemd sockets: %s", sd_sockets)
for stype, socket, addr in sd_sockets:
sockets.append((stype, socket, addr))
netlog("%s : %s", (stype, [addr]), socket)
if stype == "tcp":
host, iport = addr
add_mdns("tcp", host, iport)
sanitize_env()
if POSIX:
if xrd:
os.environ["XDG_RUNTIME_DIR"] = xrd
os.environ["XDG_SESSION_TYPE"] = "x11"
if not starting_desktop:
os.environ["XDG_CURRENT_DESKTOP"] = opts.wm_name
configure_imsettings_env(opts.input_method)
if display_name[0] != 'S':
os.environ["DISPLAY"] = display_name
os.environ["CKCON_X11_DISPLAY"] = display_name
else:
try:
del os.environ["DISPLAY"]
except:
pass
os.environ.update(protected_env)
log("env=%s", os.environ)
UINPUT_UUID_LEN = 12
UINPUT_UUID_MIN_LEN = 12
UINPUT_UUID_MAX_LEN = 32
# Start the Xvfb server first to get the display_name if needed
odisplay_name = display_name
xvfb = None
xvfb_pid = None
uinput_uuid = None
if start_vfb:
assert not proxying and xauth_data
pixel_depth = validate_pixel_depth(opts.pixel_depth, starting_desktop)
from xpra.x11.vfb_util import start_Xvfb, check_xvfb_process
from xpra.server.server_util import has_uinput
uinput_uuid = None
if has_uinput() and opts.input_devices.lower() in (
"uinput", "auto") and not shadowing:
from xpra.os_util import get_rand_chars
uinput_uuid = get_rand_chars(UINPUT_UUID_LEN)
xvfb, display_name, cleanups = start_Xvfb(opts.xvfb, pixel_depth,
display_name, cwd, uid, gid,
username, xauth_data,
uinput_uuid)
for f in cleanups:
add_cleanup(f)
xvfb_pid = xvfb.pid
#always update as we may now have the "real" display name:
os.environ["DISPLAY"] = display_name
os.environ["CKCON_X11_DISPLAY"] = display_name
os.environ.update(protected_env)
if display_name != odisplay_name and pam:
pam.set_items({"XDISPLAY": display_name})
def check_xvfb():
return check_xvfb_process(xvfb)
else:
if POSIX and clobber:
#if we're meant to be using a private XAUTHORITY file,
#make sure to point to it:
from xpra.x11.vfb_util import get_xauthority_path
xauthority = get_xauthority_path(display_name, username, uid, gid)
if os.path.exists(xauthority):
os.environ["XAUTHORITY"] = xauthority
def check_xvfb():
return True
if POSIX and not OSX and displayfd > 0:
from xpra.platform.displayfd import write_displayfd
try:
display = display_name[1:]
log("writing display='%s' to displayfd=%i", display, displayfd)
assert write_displayfd(displayfd, display), "timeout"
except Exception as e:
log.error("write_displayfd failed", exc_info=True)
log.error("Error: failed to write '%s' to fd=%s", display_name,
displayfd)
log.error(" %s", str(e) or type(e))
del e
try:
os.close(displayfd)
except:
pass
kill_display = None
if not proxying:
add_cleanup(close_gtk_display)
if not proxying and not shadowing:
def kill_display():
if xvfb_pid:
kill_xvfb(xvfb_pid)
add_cleanup(kill_display)
if opts.daemon:
def noerr(fn, *args):
try:
fn(*args)
except:
pass
log_filename1 = osexpand(
select_log_file(log_dir, opts.log_file, display_name), username,
uid, gid)
if log_filename0 != log_filename1:
# we now have the correct log filename, so use it:
os.rename(log_filename0, log_filename1)
if odisplay_name != display_name:
#this may be used by scripts, let's try not to change it:
noerr(stderr.write, "Actual display used: %s\n" % display_name)
noerr(stderr.write,
"Actual log file name is now: %s\n" % log_filename1)
noerr(stderr.flush)
noerr(stdout.close)
noerr(stderr.close)
#we should not be using stdout or stderr from this point:
del stdout
del stderr
if not check_xvfb():
#xvfb problem: exit now
return 1
#create devices for vfb if needed:
devices = {}
if not start_vfb and not proxying and not shadowing:
#try to find the existing uinput uuid:
#use a subprocess to avoid polluting our current process
#with X11 connections before we get a chance to change uid
cmd = ["xprop", "-display", display_name, "-root", "_XPRA_UINPUT_ID"]
try:
code, out, err = get_status_output(cmd)
except Exception as e:
log("failed to get existing uinput id: %s", e)
del e
else:
log("Popen(%s)=%s", cmd, (code, out, err))
if code == 0 and out.find("=") > 0:
uinput_uuid = out.split("=", 1)[1]
log("raw uinput uuid=%s", uinput_uuid)
uinput_uuid = strtobytes(uinput_uuid.strip('\n\r"\\ '))
if uinput_uuid:
if len(uinput_uuid) > UINPUT_UUID_MAX_LEN or len(
uinput_uuid) < UINPUT_UUID_MIN_LEN:
log.warn("Warning: ignoring invalid uinput id:")
log.warn(" '%s'", uinput_uuid)
uinput_uuid = None
else:
log.info("retrieved existing uinput id: %s",
bytestostr(uinput_uuid))
if uinput_uuid:
devices = create_input_devices(uinput_uuid, uid)
if ROOT and (uid != 0 or gid != 0):
log("root: switching to uid=%i, gid=%i", uid, gid)
setuidgid(uid, gid)
os.environ.update({
"HOME": home,
"USER": username,
"LOGNAME": username,
})
shell = get_shell_for_uid(uid)
if shell:
os.environ["SHELL"] = shell
#now we've changed uid, it is safe to honour all the env updates:
configure_env(opts.env)
os.environ.update(protected_env)
if opts.chdir:
os.chdir(opts.chdir)
display = None
if not proxying:
no_gtk()
if POSIX and not OSX and (starting or starting_desktop or shadowing):
#check that we can access the X11 display:
from xpra.x11.vfb_util import verify_display_ready
if not verify_display_ready(xvfb, display_name, shadowing):
return 1
if not PYTHON3:
from xpra.x11.gtk2.gdk_display_util import verify_gdk_display #@UnusedImport
else:
from xpra.x11.gtk3.gdk_display_util import verify_gdk_display #@Reimport
display = verify_gdk_display(display_name)
if not display:
return 1
#on win32, this ensures that we get the correct screen size to shadow:
from xpra.platform.gui import init as gui_init
gui_init()
#setup unix domain socket:
if not opts.socket_dir and not opts.socket_dirs:
#we always need at least one valid socket dir
from xpra.platform.paths import get_socket_dirs
opts.socket_dirs = get_socket_dirs()
local_sockets = setup_local_sockets(opts.bind, opts.socket_dir,
opts.socket_dirs, display_name,
clobber, opts.mmap_group,
opts.socket_permissions, username, uid,
gid)
netlog("setting up local sockets: %s", local_sockets)
for rec, cleanup_socket in local_sockets:
socktype, socket, sockpath = rec
#ie: ("unix-domain", sock, sockpath), cleanup_socket
sockets.append(rec)
netlog("%s %s : %s", socktype, sockpath, socket)
add_cleanup(cleanup_socket)
if opts.mdns:
ssh_port = get_ssh_port()
netlog("ssh %s:%s : %s", "", ssh_port, socket)
if ssh_port:
add_mdns("ssh", "", ssh_port)
kill_dbus = None
if shadowing:
from xpra.platform.shadow_server import ShadowServer
app = ShadowServer()
elif proxying:
from xpra.server.proxy.proxy_server import ProxyServer
app = ProxyServer()
else:
if not check_xvfb():
return 1
assert starting or starting_desktop or upgrading
from xpra.x11.gtk2.gdk_display_source import init_gdk_display_source, close_gdk_display_source
init_gdk_display_source()
insert_cleanup(close_gdk_display_source)
#(now we can access the X11 server)
#make sure the pid we save is the real one:
if not check_xvfb():
return 1
if xvfb_pid is not None:
#save the new pid (we should have one):
save_xvfb_pid(xvfb_pid)
if POSIX:
save_uinput_id(uinput_uuid or "")
dbus_pid = -1
dbus_env = {}
if clobber:
#get the saved pids and env
dbus_pid = get_dbus_pid()
dbus_env = get_dbus_env()
log("retrieved existing dbus attributes")
else:
assert starting or starting_desktop
if xvfb_pid is not None:
#save the new pid (we should have one):
save_xvfb_pid(xvfb_pid)
bus_address = protected_env.get("DBUS_SESSION_BUS_ADDRESS")
log("dbus_launch=%s, current DBUS_SESSION_BUS_ADDRESS=%s",
opts.dbus_launch, bus_address)
if opts.dbus_launch and not bus_address:
#start a dbus server:
def kill_dbus():
log("kill_dbus: dbus_pid=%s" % dbus_pid)
if dbus_pid <= 0:
return
try:
os.kill(dbus_pid, signal.SIGINT)
except Exception as e:
log.warn(
"Warning: error trying to stop dbus with pid %i:",
dbus_pid)
log.warn(" %s", e)
add_cleanup(kill_dbus)
#this also updates os.environ with the dbus attributes:
dbus_pid, dbus_env = start_dbus(opts.dbus_launch)
if dbus_pid > 0:
save_dbus_pid(dbus_pid)
if dbus_env:
save_dbus_env(dbus_env)
log("dbus attributes: pid=%s, env=%s", dbus_pid, dbus_env)
if dbus_env:
os.environ.update(dbus_env)
os.environ.update(protected_env)
if opts.forward_xdg_open and os.environ.get(
"DISPLAY") and local_sockets:
#find one xdg-open can use to talk back to us:
udpaths = [
sockpath for (stype, _, sockpath), _ in local_sockets
if stype == "unix-domain"
]
if udpaths:
os.environ["XPRA_XDG_OPEN_SERVER_SOCKET"] = udpaths[0]
for x in ("/usr/libexec/xpra", "/usr/lib/xpra"):
xdg_override = os.path.join(x, "xdg-open")
if os.path.exists(xdg_override):
os.environ["PATH"] = x + os.pathsep + os.environ.get(
"PATH", "")
break
log("env=%s", os.environ)
try:
# This import is delayed because the module depends on gtk:
from xpra.x11.bindings.window_bindings import X11WindowBindings
X11Window = X11WindowBindings()
if (starting or
starting_desktop) and not clobber and opts.resize_display:
from xpra.x11.vfb_util import set_initial_resolution
set_initial_resolution(starting_desktop)
except ImportError as e:
log.error(
"Failed to load Xpra server components, check your installation: %s"
% e)
return 1
if starting or upgrading:
if not X11Window.displayHasXComposite():
log.error(
"Xpra 'start' subcommand runs as a compositing manager")
log.error(
" it cannot use a display which lacks the XComposite extension!"
)
return 1
assert not PYTHON3
if starting:
#check for an existing window manager:
from xpra.x11.gtk2.wm import wm_check
if not wm_check(display, opts.wm_name, upgrading):
return 1
log("XShape=%s", X11Window.displayHasXShape())
from xpra.x11.server import XpraServer
app = XpraServer(clobber)
else:
assert starting_desktop and not PYTHON3
from xpra.x11.desktop_server import XpraDesktopServer
app = XpraDesktopServer()
app.init_virtual_devices(devices)
if proxying or upgrading:
#when proxying or upgrading, don't exec any plain start commands:
opts.start = opts.start_child = []
elif opts.exit_with_children:
assert opts.start_child, "exit-with-children was specified but start-child is missing!"
elif opts.start_child:
log.warn("Warning: the 'start-child' option is used,")
log.warn(" but 'exit-with-children' is not enabled,")
log.warn(" use 'start' instead")
try:
app._ssl_wrap_socket = wrap_socket_fn
app.original_desktop_display = desktop_display
app.exec_cwd = opts.chdir or cwd
app.init(opts)
app.setup()
except InitException as e:
log.error("xpra server initialization error:")
log.error(" %s", e)
return 1
except Exception as e:
log.error("Error: cannot start the %s server",
app.session_type,
exc_info=True)
log.error(str(e))
log.info("")
return 1
#publish mdns records:
if opts.mdns:
from xpra.platform.info import get_username
from xpra.server.socket_util import mdns_publish
mdns_info = {
"display": display_name,
"username": get_username(),
"uuid": app.uuid,
"platform": sys.platform,
"type": app.session_type,
}
MDNS_EXPOSE_NAME = envbool("XPRA_MDNS_EXPOSE_NAME", True)
if MDNS_EXPOSE_NAME and app.session_name:
mdns_info["name"] = app.session_name
for mode, listen_on in mdns_recs.items():
mdns_publish(display_name, mode, listen_on, mdns_info)
del opts
log("%s(%s)", app.init_sockets, sockets)
app.init_sockets(sockets)
log("%s(%s)", app.init_when_ready, _when_ready)
app.init_when_ready(_when_ready)
try:
#from here on, we own the vfb, even if we inherited one:
if (starting or starting_desktop or upgrading) and clobber:
#and it will be killed if exit cleanly:
xvfb_pid = get_xvfb_pid()
log("running %s", app.run)
r = app.run()
log("%s()=%s", app.run, r)
except KeyboardInterrupt:
log.info("stopping on KeyboardInterrupt")
r = 0
except Exception:
log.error("server error", exc_info=True)
r = -128
if r > 0:
# Upgrading/exiting, so leave X and dbus servers running
if kill_display:
_cleanups.remove(kill_display)
if kill_dbus:
_cleanups.remove(kill_dbus)
from xpra.server import EXITING_CODE
if r == EXITING_CODE:
log.info("exiting: not cleaning up Xvfb")
else:
log.info("upgrading: not cleaning up Xvfb")
log("cleanups=%s", _cleanups)
r = 0
try:
return r
finally:
run_cleanups()
import gc
gc.collect()
def test_password(self):
password = strtobytes(uuid.uuid4().hex)
self._test_hmac_auth("password", password, value=password)
def _get_cipher(key, iv):
global backend
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
return Cipher(algorithms.AES(key),
modes.CBC(strtobytes(iv)),
backend=backend)
def get(key, default=None):
return capabilities.get(strtobytes(key), default)
def enc(x):
try:
return x.encode("utf8")
except:
return strtobytes(x)
def start_win32_shadow(self, username, password, new_session_dict):
log("start_win32_shadow%s", (username, "..", new_session_dict))
from xpra.platform.win32.wtsapi import find_session
session_info = find_session(username)
if not session_info:
#first, Logon:
try:
from xpra.platform.win32.desktoplogon_lib import Logon
Logon(strtobytes(username), strtobytes(password))
except Exception:
log.error("Error: failed to logon as '%s'",
username,
exc_info=True)
#hwinstaold = set_window_station("winsta0")
app_dir = get_app_dir()
shadow_command = os.path.join(app_dir, "Xpra-Shadow.exe")
paexec = os.path.join(app_dir, "paexec.exe")
named_pipe = username.replace(" ", "_")
cmd = []
exe = shadow_command
#use paexec to access the GUI session:
if envbool("XPRA_PAEXEC",
True) and os.path.exists(paexec) and os.path.isfile(paexec):
#find the session-id to shadow:
if not session_info:
session_info = find_session(username)
if session_info:
cmd = [
"paexec.exe",
"-i",
str(session_info["SessionID"]),
"-s",
]
exe = paexec
else:
log.warn("Warning: session not found for username '%s'",
username)
else:
log.warn("Warning: starting without paexec, expect a black screen")
cmd += [
shadow_command,
"--bind=%s" % named_pipe,
#"--tray=no",
]
#unless explicitly stated otherwise, exit with client:
if new_session_dict.get("exit-with-client", None) is not False:
cmd.append("--exit-with-client=yes")
from xpra.log import debug_enabled_categories
if debug_enabled_categories:
cmd += ["-d", ",".join(tuple(debug_enabled_categories))]
env = self.get_proxy_env()
env["XPRA_REDIRECT_OUTPUT"] = "1"
#env["XPRA_LOG_FILENAME"] = "E:\\Shadow-Instance.log"
proc = exec_command(username, cmd, exe, app_dir, env)
from xpra.platform.win32.dotxpra import DotXpra
dotxpra = DotXpra()
for t in range(10):
r = pollwait(proc, 1)
if r is not None:
log("pollwait=%s", r)
try:
log("stdout=%s", proc.stdout.read())
log("stderr=%s", proc.stderr.read())
except (OSError, AttributeError):
log("failed to read stdout / stderr of subprocess",
exc_info=True)
if r != 0:
raise Exception(
"shadow subprocess failed with exit code %s" % r)
else:
raise Exception("shadow subprocess has already terminated")
if t >= 4:
state = dotxpra.get_display_state(named_pipe)
log("get_display_state(%s)=%s", state)
if state == DotXpra.LIVE:
#TODO: test the named pipe
sleep(2)
break
self.child_reaper.add_process(proc, "server-%s" % username,
"xpra shadow", True, True)
return proc, "named-pipe://%s" % named_pipe, named_pipe
def _process_send_file(self, packet):
#the remote end is sending us a file
basefilename, mimetype, printit, openit, filesize, file_data, options = packet[1:8]
send_id = ""
if len(packet)>=9:
send_id = packet[8]
if not self.accept_data(send_id, b"file", basefilename, printit, openit):
filelog.warn("Warning: file transfer rejected for file '%s'", bytestostr(basefilename))
return
options = typedict(options)
if printit:
l = printlog
assert self.printing
else:
l = filelog
assert self.file_transfer
l("receiving file: %s",
[basefilename, mimetype, printit, openit, filesize, "%s bytes" % len(file_data), options])
assert filesize>0, "invalid file size: %s" % filesize
if filesize>self.file_size_limit*1024*1024:
l.error("Error: file '%s' is too large:", basefilename)
l.error(" %iMB, the file size limit is %iMB", filesize//1024//1024, self.file_size_limit)
return
#basefilename should be utf8:
try:
base = basefilename.decode("utf8")
except:
base = bytestostr(basefilename)
filename, fd = safe_open_download_file(base, mimetype)
self.file_descriptors.add(fd)
chunk_id = options.strget("file-chunk-id")
if chunk_id:
chunk_id = strtobytes(chunk_id)
if len(self.receive_chunks_in_progress)>=MAX_CONCURRENT_FILES:
self.send("ack-file-chunk", chunk_id, False, "too many file transfers in progress", 0)
os.close(fd)
return
digest = hashlib.sha1()
chunk = 0
timer = self.timeout_add(CHUNK_TIMEOUT, self._check_chunk_receiving, chunk_id, chunk)
chunk_state = [
monotonic_time(),
fd, filename, mimetype,
printit, openit, filesize,
options, digest, 0, timer, chunk,
]
self.receive_chunks_in_progress[chunk_id] = chunk_state
self.send("ack-file-chunk", chunk_id, True, "", chunk)
return
#not chunked, full file:
assert file_data, "no data, got %s" % (file_data,)
if len(file_data)!=filesize:
l.error("Error: invalid data size for file '%s'", basefilename)
l.error(" received %i bytes, expected %i bytes", len(file_data), filesize)
return
#check digest if present:
def check_digest(algo="sha1", libfn=hashlib.sha1):
digest = options.get(algo)
if digest:
u = libfn()
u.update(file_data)
l("%s digest: %s - expected: %s", algo, u.hexdigest(), digest)
self.check_digest(basefilename, u.hexdigest(), digest, algo)
check_digest("sha1", hashlib.sha1)
check_digest("md5", hashlib.md5)
try:
os.write(fd, file_data)
finally:
os.close(fd)
self.do_process_downloaded_file(filename, mimetype, printit, openit, filesize, options)
def get_cursor_data(hCursor):
#w, h = get_fixed_cursor_size()
if not hCursor:
return None
x, y = 0, 0
dc = None
memdc = None
bitmap = None
old_handle = None
pixels = None
try:
ii = ICONINFO()
ii.cbSize = ctypes.sizeof(ICONINFO)
if not GetIconInfo(hCursor, ctypes.byref(ii)):
raise WindowsError() #@UndefinedVariable
x = ii.xHotspot
y = ii.yHotspot
cursorlog(
"get_cursor_data(%#x) hotspot at %ix%i, hbmColor=%#x, hbmMask=%#x",
hCursor, x, y, ii.hbmColor or 0, ii.hbmMask or 0)
if not ii.hbmColor:
#FIXME: we don't handle black and white cursors
return None
iie = ICONINFOEXW()
iie.cbSize = ctypes.sizeof(ICONINFOEXW)
if not GetIconInfoExW(hCursor, ctypes.byref(iie)):
raise WindowsError() #@UndefinedVariable
name = iie.szResName[:MAX_PATH]
cursorlog("wResID=%i, sxModName=%s, szResName=%s", iie.wResID,
iie.sxModName[:MAX_PATH], name)
bm = Bitmap()
if not GetObjectA(ii.hbmColor, ctypes.sizeof(Bitmap),
ctypes.byref(bm)):
raise WindowsError() #@UndefinedVariable
cursorlog(
"cursor bitmap: type=%i, width=%i, height=%i, width bytes=%i, planes=%i, bits pixel=%i, bits=%#x",
bm.bmType, bm.bmWidth, bm.bmHeight, bm.bmWidthBytes, bm.bmPlanes,
bm.bmBitsPixel, bm.bmBits or 0)
w = bm.bmWidth
h = bm.bmHeight
dc = GetDC(None)
assert dc, "failed to get a drawing context"
memdc = CreateCompatibleDC(dc)
assert memdc, "failed to get a compatible drawing context from %s" % dc
bitmap = CreateCompatibleBitmap(dc, w, h)
assert bitmap, "failed to get a compatible bitmap from %s" % dc
old_handle = SelectObject(memdc, bitmap)
#check if icon is animated:
UINT_MAX = 2**32 - 1
if not DrawIconEx(memdc, 0, 0, hCursor, w, h, UINT_MAX, 0, 0):
cursorlog("cursor is animated!")
#if not DrawIcon(memdc, 0, 0, hCursor):
if not DrawIconEx(memdc, 0, 0, hCursor, w, h, 0, 0,
win32con.DI_NORMAL):
raise WindowsError() #@UndefinedVariable
buf_size = bm.bmWidthBytes * h
buf = ctypes.create_string_buffer(b"", buf_size)
r = GetBitmapBits(bitmap, buf_size, ctypes.byref(buf))
cursorlog("get_cursor_data(%#x) GetBitmapBits(%#x, %#x, %#x)=%i",
hCursor, bitmap, buf_size, ctypes.addressof(buf), r)
if r == 0:
cursorlog.error("Error: failed to copy screen bitmap data")
return None
elif r != buf_size:
cursorlog.warn(
"Warning: invalid cursor buffer size, got %i bytes but expected %i",
r, buf_size)
return None
else:
#32-bit data:
pixels = bytearray(strtobytes(buf.raw))
has_alpha = False
has_pixels = False
for i in range(len(pixels) // 4):
has_pixels = has_pixels or pixels[i * 4] != 0 or pixels[
i * 4 + 1] != 0 or pixels[i * 4 + 2] != 0
has_alpha = has_alpha or pixels[i * 4 + 3] != 0
if has_pixels and has_alpha:
break
if has_pixels and not has_alpha:
#generate missing alpha - don't ask me why
for i in range(len(pixels) // 4):
if pixels[i * 4] != 0 or pixels[i * 4 +
1] != 0 or pixels[i * 4 +
2] != 0:
pixels[i * 4 + 3] = 0xff
return [0, 0, w, h, x, y, hCursor, bytes(pixels), strtobytes(name)]
except Exception as e:
cursorlog("get_cursor_data(%#x)", hCursor, exc_info=True)
cursorlog.error("Error: failed to grab cursor:")
cursorlog.error(" %s", str(e) or type(e))
return None
finally:
if old_handle:
SelectObject(memdc, old_handle)
if bitmap:
DeleteObject(bitmap)
if memdc:
DeleteDC(memdc)
if dc:
ReleaseDC(None, dc)
def bytesget(self, k, default=None):
v = self.capsget(k, default)
if v is None:
return default
from xpra.os_util import strtobytes
return strtobytes(v)
def hexstr(v):
return binascii.hexlify(strtobytes(v))
def get_password(self) -> str:
file_data = self.load_password_file()
if file_data is None:
return None
return strtobytes(file_data)
def make_websocket_accept_hash(key):
GUID = b"258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
accept = sha1(strtobytes(key) + GUID).digest()
return b64encode(accept)
def do_run_server(error_cb, opts, mode, xpra_file, extra_args, desktop_display=None):
assert mode in (
"start", "start-desktop",
"upgrade", "upgrade-desktop",
"shadow", "proxy",
)
try:
cwd = os.getcwd()
except OSError:
cwd = os.path.expanduser("~")
warn("current working directory does not exist, using '%s'\n" % cwd)
validate_encryption(opts)
if opts.encoding=="help" or "help" in opts.encodings:
return show_encoding_help(opts)
#remove anything pointing to dbus from the current env
#(so we only detect a dbus instance started by pam,
# and override everything else)
for k in tuple(os.environ.keys()):
if k.startswith("DBUS_"):
del os.environ[k]
starting = mode == "start"
starting_desktop = mode == "start-desktop"
upgrading = mode == "upgrade"
upgrading_desktop = mode == "upgrade-desktop"
shadowing = mode == "shadow"
proxying = mode == "proxy"
clobber = upgrading or upgrading_desktop or opts.use_display
start_vfb = not (shadowing or proxying or clobber)
if not proxying and PYTHON3 and POSIX and not OSX:
#we don't support wayland servers,
#so make sure GDK will use the X11 backend:
os.environ["GDK_BACKEND"] = "x11"
if proxying or upgrading or upgrading_desktop:
#when proxying or upgrading, don't exec any plain start commands:
opts.start = opts.start_child = []
elif opts.exit_with_children:
assert opts.start_child, "exit-with-children was specified but start-child is missing!"
elif opts.start_child:
warn("Warning: the 'start-child' option is used,")
warn(" but 'exit-with-children' is not enabled,")
warn(" use 'start' instead")
if opts.bind_rfb and (proxying or starting):
get_util_logger().warn("Warning: bind-rfb sockets cannot be used with '%s' mode" % mode)
opts.bind_rfb = ""
if not shadowing and not starting_desktop:
opts.rfb_upgrade = 0
if upgrading or upgrading_desktop or shadowing:
#there should already be one running
opts.pulseaudio = False
#get the display name:
if shadowing and not extra_args:
if WIN32 or OSX:
#just a virtual name for the only display available:
display_name = ":0"
else:
from xpra.scripts.main import guess_X11_display
dotxpra = DotXpra(opts.socket_dir, opts.socket_dirs)
display_name = guess_X11_display(dotxpra, desktop_display)
elif (upgrading or upgrading_desktop) and not extra_args:
display_name = guess_xpra_display(opts.socket_dir, opts.socket_dirs)
else:
if len(extra_args) > 1:
error_cb("too many extra arguments (%i): only expected a display number" % len(extra_args))
if len(extra_args) == 1:
display_name = extra_args[0]
if not shadowing and not proxying and not opts.use_display:
display_name_check(display_name)
else:
if proxying:
#find a free display number:
dotxpra = DotXpra(opts.socket_dir, opts.socket_dirs)
all_displays = dotxpra.sockets()
#ie: [("LIVE", ":100"), ("LIVE", ":200"), ...]
displays = [v[1] for v in all_displays]
display_name = None
for x in range(1000, 20000):
v = ":%s" % x
if v not in displays:
display_name = v
break
if not display_name:
error_cb("you must specify a free virtual display name to use with the proxy server")
elif opts.use_display:
#only use automatic guess for xpra displays and not X11 displays:
display_name = guess_xpra_display(opts.socket_dir, opts.socket_dirs)
else:
# We will try to find one automaticaly
# Use the temporary magic value 'S' as marker:
display_name = 'S' + str(os.getpid())
if not (shadowing or proxying or upgrading or upgrading_desktop) and \
opts.exit_with_children and not opts.start_child:
error_cb("--exit-with-children specified without any children to spawn; exiting immediately")
atexit.register(run_cleanups)
# Generate the script text now, because os.getcwd() will
# change if/when we daemonize:
from xpra.server.server_util import (
xpra_runner_shell_script,
write_runner_shell_scripts,
find_log_dir,
create_input_devices,
)
script = xpra_runner_shell_script(xpra_file, cwd, opts.socket_dir)
uid = int(opts.uid)
gid = int(opts.gid)
username = get_username_for_uid(uid)
home = get_home_for_uid(uid)
xauth_data = None
if start_vfb:
xauth_data = get_hex_uuid()
ROOT = POSIX and getuid()==0
protected_fds = []
protected_env = {}
stdout = sys.stdout
stderr = sys.stderr
# Daemonize:
if POSIX and opts.daemon:
#daemonize will chdir to "/", so try to use an absolute path:
if opts.password_file:
opts.password_file = tuple(os.path.abspath(x) for x in opts.password_file)
from xpra.server.server_util import daemonize
daemonize()
displayfd = 0
if POSIX and opts.displayfd:
try:
displayfd = int(opts.displayfd)
if displayfd>0:
protected_fds.append(displayfd)
except ValueError as e:
stderr.write("Error: invalid displayfd '%s':\n" % opts.displayfd)
stderr.write(" %s\n" % e)
del e
# if pam is present, try to create a new session:
pam = None
PAM_OPEN = POSIX and envbool("XPRA_PAM_OPEN", ROOT and uid!=0)
if PAM_OPEN:
try:
from xpra.server.pam import pam_session #@UnresolvedImport
except ImportError as e:
stderr.write("Error: failed to import pam module\n")
stderr.write(" %s" % e)
del e
PAM_OPEN = False
if PAM_OPEN:
fdc = FDChangeCaptureContext()
with fdc:
pam = pam_session(username)
env = {
#"XDG_SEAT" : "seat1",
#"XDG_VTNR" : "0",
"XDG_SESSION_TYPE" : "x11",
#"XDG_SESSION_CLASS" : "user",
"XDG_SESSION_DESKTOP" : "xpra",
}
#maybe we should just bail out instead?
if pam.start():
pam.set_env(env)
items = {}
if display_name.startswith(":"):
items["XDISPLAY"] = display_name
if xauth_data:
items["XAUTHDATA"] = xauth_data
pam.set_items(items)
if pam.open():
#we can't close it, because we're not going to be root any more,
#but since we're the process leader for the session,
#terminating will also close the session
#add_cleanup(pam.close)
protected_env = pam.get_envlist()
os.environ.update(protected_env)
#closing the pam fd causes the session to be closed,
#and we don't want that!
protected_fds += fdc.get_new_fds()
#get XDG_RUNTIME_DIR from env options,
#which may not be have updated os.environ yet when running as root with "--uid="
xrd = os.path.abspath(parse_env(opts.env).get("XDG_RUNTIME_DIR", ""))
if ROOT and (uid>0 or gid>0):
#we're going to chown the directory if we create it,
#ensure this cannot be abused, only use "safe" paths:
if not any(x for x in ("/run/user/%i" % uid, "/tmp", "/var/tmp") if xrd.startswith(x)):
xrd = ""
#these paths could cause problems if we were to create and chown them:
if xrd.startswith("/tmp/.X11-unix") or xrd.startswith("/tmp/.XIM-unix"):
xrd = ""
if not xrd:
xrd = os.environ.get("XDG_RUNTIME_DIR")
xrd = create_runtime_dir(xrd, uid, gid)
if xrd:
#this may override the value we get from pam
#with the value supplied by the user:
protected_env["XDG_RUNTIME_DIR"] = xrd
if POSIX and not ROOT:
# Write out a shell-script so that we can start our proxy in a clean
# environment:
write_runner_shell_scripts(script)
if start_vfb or opts.daemon:
#we will probably need a log dir
#either for the vfb, or for our own log file
log_dir = opts.log_dir or ""
if not log_dir or log_dir.lower()=="auto":
log_dir = find_log_dir(username, uid=uid, gid=gid)
if not log_dir:
raise InitException("cannot find or create a logging directory")
#expose the log-dir as "XPRA_LOG_DIR",
#this is used by Xdummy for the Xorg log file
if "XPRA_LOG_DIR" not in os.environ:
os.environ["XPRA_LOG_DIR"] = log_dir
if opts.daemon:
from xpra.server.server_util import select_log_file, open_log_file, redirect_std_to_log
log_filename0 = osexpand(select_log_file(log_dir, opts.log_file, display_name), username, uid, gid)
logfd = open_log_file(log_filename0)
if ROOT and (uid>0 or gid>0):
try:
os.fchown(logfd, uid, gid)
except (OSError, IOError):
pass
stdout, stderr = redirect_std_to_log(logfd, *protected_fds)
try:
stderr.write("Entering daemon mode; "
+ "any further errors will be reported to:\n"
+ (" %s\n" % log_filename0))
except IOError:
#we tried our best, logging another error won't help
pass
#warn early about this:
if (starting or starting_desktop) and desktop_display and opts.notifications and not opts.dbus_launch:
print_DE_warnings()
from xpra.net.socket_util import get_network_logger, setup_local_sockets, create_sockets
sockets = create_sockets(opts, error_cb)
sanitize_env()
if POSIX:
if xrd:
os.environ["XDG_RUNTIME_DIR"] = xrd
if not OSX:
os.environ["XDG_SESSION_TYPE"] = "x11"
if not starting_desktop:
os.environ["XDG_CURRENT_DESKTOP"] = opts.wm_name
configure_imsettings_env(opts.input_method)
if display_name[0] != 'S':
os.environ["DISPLAY"] = display_name
if POSIX:
os.environ["CKCON_X11_DISPLAY"] = display_name
else:
try:
del os.environ["DISPLAY"]
except KeyError:
pass
os.environ.update(protected_env)
from xpra.log import Logger
log = Logger("server")
log("env=%s", os.environ)
UINPUT_UUID_LEN = 12
UINPUT_UUID_MIN_LEN = 12
UINPUT_UUID_MAX_LEN = 32
# Start the Xvfb server first to get the display_name if needed
odisplay_name = display_name
xvfb = None
xvfb_pid = None
uinput_uuid = None
if start_vfb:
assert not proxying and xauth_data
pixel_depth = validate_pixel_depth(opts.pixel_depth, starting_desktop)
from xpra.x11.vfb_util import start_Xvfb, check_xvfb_process
from xpra.server.server_util import has_uinput
uinput_uuid = None
if has_uinput() and opts.input_devices.lower() in ("uinput", "auto") and not shadowing:
from xpra.os_util import get_rand_chars
uinput_uuid = get_rand_chars(UINPUT_UUID_LEN)
xvfb, display_name, cleanups = start_Xvfb(opts.xvfb, pixel_depth, display_name, cwd,
uid, gid, username, xauth_data, uinput_uuid)
for f in cleanups:
add_cleanup(f)
xvfb_pid = xvfb.pid
#always update as we may now have the "real" display name:
os.environ["DISPLAY"] = display_name
os.environ["CKCON_X11_DISPLAY"] = display_name
os.environ.update(protected_env)
if display_name!=odisplay_name and pam:
pam.set_items({"XDISPLAY" : display_name})
def check_xvfb():
return check_xvfb_process(xvfb)
else:
if POSIX and clobber:
#if we're meant to be using a private XAUTHORITY file,
#make sure to point to it:
from xpra.x11.vfb_util import get_xauthority_path
xauthority = get_xauthority_path(display_name, username, uid, gid)
if os.path.exists(xauthority):
log("found XAUTHORITY=%s", xauthority)
os.environ["XAUTHORITY"] = xauthority
def check_xvfb():
return True
if POSIX and not OSX and displayfd>0:
from xpra.platform.displayfd import write_displayfd
try:
display_no = display_name[1:]
#ensure it is a string containing the number:
display_no = str(int(display_no))
log("writing display_no='%s' to displayfd=%i", display_no, displayfd)
assert write_displayfd(displayfd, display_no), "timeout"
except Exception as e:
log.error("write_displayfd failed", exc_info=True)
log.error("Error: failed to write '%s' to fd=%s", display_name, displayfd)
log.error(" %s", str(e) or type(e))
del e
if opts.daemon:
def noerr(fn, *args):
try:
fn(*args)
except Exception:
pass
log_filename1 = osexpand(select_log_file(log_dir, opts.log_file, display_name), username, uid, gid)
if log_filename0 != log_filename1:
# we now have the correct log filename, so use it:
os.rename(log_filename0, log_filename1)
if odisplay_name!=display_name:
#this may be used by scripts, let's try not to change it:
noerr(stderr.write, "Actual display used: %s\n" % display_name)
noerr(stderr.write, "Actual log file name is now: %s\n" % log_filename1)
noerr(stderr.flush)
noerr(stdout.close)
noerr(stderr.close)
#we should not be using stdout or stderr from this point:
del stdout
del stderr
if not check_xvfb():
#xvfb problem: exit now
return 1
#create devices for vfb if needed:
devices = {}
if not start_vfb and not proxying and not shadowing and envbool("XPRA_UINPUT", True):
#try to find the existing uinput uuid:
#use a subprocess to avoid polluting our current process
#with X11 connections before we get a chance to change uid
prop = "_XPRA_UINPUT_ID"
cmd = ["xprop", "-display", display_name, "-root", prop]
log("looking for '%s' on display '%s' with XAUTHORITY='%s'", prop, display_name, os.environ.get("XAUTHORITY"))
try:
code, out, err = get_status_output(cmd)
except Exception as e:
log("failed to get existing uinput id: %s", e)
del e
else:
log("Popen(%s)=%s", cmd, (code, out, err))
if code==0 and out.find("=")>0:
uinput_uuid = out.split("=", 1)[1]
log("raw uinput uuid=%s", uinput_uuid)
uinput_uuid = strtobytes(uinput_uuid.strip('\n\r"\\ '))
if uinput_uuid:
if len(uinput_uuid)>UINPUT_UUID_MAX_LEN or len(uinput_uuid)<UINPUT_UUID_MIN_LEN:
log.warn("Warning: ignoring invalid uinput id:")
log.warn(" '%s'", uinput_uuid)
uinput_uuid = None
else:
log.info("retrieved existing uinput id: %s", bytestostr(uinput_uuid))
if uinput_uuid:
devices = create_input_devices(uinput_uuid, uid)
if ROOT and (uid!=0 or gid!=0):
log("root: switching to uid=%i, gid=%i", uid, gid)
setuidgid(uid, gid)
os.environ.update({
"HOME" : home,
"USER" : username,
"LOGNAME" : username,
})
shell = get_shell_for_uid(uid)
if shell:
os.environ["SHELL"] = shell
#now we've changed uid, it is safe to honour all the env updates:
configure_env(opts.env)
os.environ.update(protected_env)
if opts.chdir:
log("chdir(%s)", opts.chdir)
os.chdir(opts.chdir)
dbus_pid, dbus_env = 0, {}
if not shadowing and POSIX and not OSX and not clobber:
no_gtk()
assert starting or starting_desktop or proxying
from xpra.server.dbus.dbus_start import start_dbus
dbus_pid, dbus_env = start_dbus(opts.dbus_launch)
if dbus_env:
os.environ.update(dbus_env)
display = None
if not proxying:
if POSIX and not OSX:
no_gtk()
if starting or starting_desktop or shadowing:
#check that we can access the X11 display:
from xpra.x11.vfb_util import verify_display_ready
if not verify_display_ready(xvfb, display_name, shadowing):
return 1
log("X11 display is ready")
no_gtk()
from xpra.x11.gtk_x11.gdk_display_source import verify_gdk_display
display = verify_gdk_display(display_name)
if not display:
return 1
log("GDK can access the display")
#on win32, this ensures that we get the correct screen size to shadow:
from xpra.platform.gui import init as gui_init
log("gui_init()")
gui_init()
#setup unix domain socket:
netlog = get_network_logger()
local_sockets = setup_local_sockets(opts.bind,
opts.socket_dir, opts.socket_dirs,
display_name, clobber,
opts.mmap_group, opts.socket_permissions,
username, uid, gid)
netlog("setting up local sockets: %s", local_sockets)
sockets += local_sockets
if POSIX and (starting or upgrading or starting_desktop or upgrading_desktop):
#all unix domain sockets:
ud_paths = [sockpath for stype, _, sockpath, _ in local_sockets if stype=="unix-domain"]
if ud_paths:
#choose one so our xdg-open override script can use to talk back to us:
if opts.forward_xdg_open:
for x in ("/usr/libexec/xpra", "/usr/lib/xpra"):
xdg_override = os.path.join(x, "xdg-open")
if os.path.exists(xdg_override):
os.environ["PATH"] = x+os.pathsep+os.environ.get("PATH", "")
os.environ["XPRA_SERVER_SOCKET"] = ud_paths[0]
break
else:
log.warn("Warning: no local server sockets,")
if opts.forward_xdg_open:
log.warn(" forward-xdg-open cannot be enabled")
log.warn(" non-embedded ssh connections will not be available")
set_server_features(opts)
if not proxying and POSIX and not OSX:
if not check_xvfb():
return 1
from xpra.x11.gtk_x11.gdk_display_source import init_gdk_display_source
if os.environ.get("NO_AT_BRIDGE") is None:
os.environ["NO_AT_BRIDGE"] = "1"
init_gdk_display_source()
#(now we can access the X11 server)
if uinput_uuid:
save_uinput_id(uinput_uuid)
if shadowing:
app = make_shadow_server()
elif proxying:
app = make_proxy_server()
else:
if starting or upgrading:
app = make_server(clobber)
else:
assert starting_desktop or upgrading_desktop
app = make_desktop_server(clobber)
app.init_virtual_devices(devices)
try:
app.exec_cwd = opts.chdir or cwd
app.display_name = display_name
app.init(opts)
app.init_sockets(sockets)
app.init_dbus(dbus_pid, dbus_env)
if not shadowing and (xvfb_pid or clobber):
app.init_display_pid(xvfb_pid)
app.original_desktop_display = desktop_display
del opts
if not app.server_ready():
return 1
app.server_init()
app.setup()
app.init_when_ready(_when_ready)
except InitException as e:
log.error("xpra server initialization error:")
log.error(" %s", e)
app.cleanup()
return 1
except Exception as e:
log.error("Error: cannot start the %s server", app.session_type, exc_info=True)
log.error(str(e))
log.info("")
app.cleanup()
return 1
try:
log("running %s", app.run)
r = app.run()
log("%s()=%s", app.run, r)
except KeyboardInterrupt:
log.info("stopping on KeyboardInterrupt")
app.cleanup()
return 0
except Exception:
log.error("server error", exc_info=True)
app.cleanup()
return -128
else:
if r>0:
r = 0
return r
def get_auth_info(self):
self.load_password_file()
if not self.password_filedata:
return None
return self.password_filedata.get(strtobytes(self.username))
def hexstr(v):
return binascii.hexlify(strtobytes(v))
def enc(x):
try:
return bytestostr(x).encode("utf8")
except UnicodeEncodeError:
return strtobytes(x)
def b(s):
try:
return s.encode("utf8")
except:
return strtobytes(s)
def _parse_security_result(self, packet):
self.share = packet != b"\0"
log("parse_security_result: sharing=%s, sending ClientInit with session-name=%s", self.share, self.session_name)
#send ClientInit
self._packet_parser = self._parse_rfb
w, h, bpp, depth, bigendian, truecolor, rmax, gmax, bmax, rshift, bshift, gshift = self._get_rfb_pixelformat()
packet = struct.pack(b"!HH"+PIXEL_FORMAT+b"I", w, h, bpp, depth, bigendian, truecolor, rmax, gmax, bmax, rshift, bshift, gshift, 0, 0, 0, len(self.session_name))+strtobytes(self.session_name)
self.send(packet)
self._process_packet_cb(self, [b"authenticated"])
return 1
def _bell_signaled(self, wm, event):
log("bell signaled on window %#x", get_xwindow(event.window))
if not self.bell:
return
wid = 0
if event.window!=get_default_root_window() and event.window_model is not None:
try:
wid = self._window_to_id[event.window_model]
except:
pass
log("_bell_signaled(%s,%r) wid=%s", wm, event, wid)
for ss in self._server_sources.values():
ss.bell(wid, event.device, event.percent, event.pitch, event.duration, event.bell_class, event.bell_id, strtobytes(event.bell_name or ""))
def do_update_server_settings(self,
settings,
reset=False,
dpi=0,
double_click_time=0,
double_click_distance=(-1, -1),
antialias={},
cursor_size=-1):
if not self._xsettings_enabled:
log("ignoring xsettings update: %s", settings)
return
if reset:
#FIXME: preserve serial? (what happens when we change values which had the same serial?)
self.reset_settings()
self._settings = {}
if self._default_xsettings:
#try to parse default xsettings into a dict:
try:
for _, prop_name, value, _ in self._default_xsettings[1]:
self._settings[prop_name] = value
except Exception as e:
log("failed to parse %s", self._default_xsettings)
log.warn("Warning: failed to parse default XSettings:")
log.warn(" %s", e)
old_settings = dict(self._settings)
log("server_settings: old=%s, updating with=%s", nonl(old_settings),
nonl(settings))
log(
"overrides: dpi=%s, double click time=%s, double click distance=%s",
dpi, double_click_time, double_click_distance)
log("overrides: antialias=%s", antialias)
self._settings.update(settings)
from xpra.x11.xsettings_prop import XSettingsTypeInteger, XSettingsTypeString, BLACKLISTED_XSETTINGS
for k, v in settings.items():
#cook the "resource-manager" value to add the DPI and/or antialias values:
if k == b"resource-manager" and (dpi > 0 or antialias
or cursor_size > 0):
value = bytestostr(v)
#parse the resources into a dict:
values = {}
options = value.split("\n")
for option in options:
if not option:
continue
parts = option.split(":\t", 1)
if len(parts) != 2:
log("skipped invalid option: '%s'", option)
continue
if parts[0] in BLACKLISTED_XSETTINGS:
log("skipped blacklisted option: '%s'", option)
continue
values[parts[0]] = parts[1]
if cursor_size > 0:
values["Xcursor.size"] = cursor_size
if dpi > 0:
values["Xft.dpi"] = dpi
values["Xft/DPI"] = dpi * 1024
values["gnome.Xft/DPI"] = dpi * 1024
if antialias:
ad = typedict(antialias)
subpixel_order = "none"
sss = tuple(self._server_sources.values())
if len(sss) == 1:
#only honour sub-pixel hinting if a single client is connected
#and only when it is not using any scaling (or overriden with SCALED_FONT_ANTIALIAS):
ss = sss[0]
ds_unscaled = getattr(ss, "desktop_size_unscaled",
None)
ds_scaled = getattr(ss, "desktop_size", None)
if SCALED_FONT_ANTIALIAS or (not ds_unscaled or
ds_unscaled == ds_scaled):
subpixel_order = ad.strget("orientation",
"none").lower()
values.update({
"Xft.antialias": ad.intget("enabled", -1),
"Xft.hinting": ad.intget("hinting", -1),
"Xft.rgba": subpixel_order,
"Xft.hintstyle": _get_antialias_hintstyle(ad)
})
log("server_settings: resource-manager values=%s",
nonl(values))
#convert the dict back into a resource string:
value = ''
for vk, vv in values.items():
value += "%s:\t%s\n" % (vk, vv)
#record the actual value used
self._settings[b"resource-manager"] = value
v = value.encode("utf-8")
#cook xsettings to add various settings:
#(as those may not be present in xsettings on some platforms.. like win32 and osx)
if k==b"xsettings-blob" and \
(self.double_click_time>0 or self.double_click_distance!=(-1, -1) or antialias or dpi>0):
#start by removing blacklisted options:
def filter_blacklisted():
serial, values = v
new_values = []
for _t, _n, _v, _s in values:
if bytestostr(_n) in BLACKLISTED_XSETTINGS:
log("skipped blacklisted option %s",
(_t, _n, _v, _s))
else:
new_values.append((_t, _n, _v, _s))
return serial, new_values
v = filter_blacklisted()
def set_xsettings_value(name, value_type, value):
#remove existing one, if any:
serial, values = v
new_values = [(_t, _n, _v, _s)
for (_t, _n, _v, _s) in values if _n != name]
new_values.append((value_type, name, value, 0))
return serial, new_values
def set_xsettings_int(name, value):
if value < 0: #not set, return v unchanged
return v
return set_xsettings_value(name, XSettingsTypeInteger,
value)
if dpi > 0:
v = set_xsettings_int(b"Xft/DPI", dpi * 1024)
if double_click_time > 0:
v = set_xsettings_int(b"Net/DoubleClickTime",
self.double_click_time)
if antialias:
ad = typedict(antialias)
v = set_xsettings_int(b"Xft/Antialias",
ad.intget("enabled", -1))
v = set_xsettings_int(b"Xft/Hinting",
ad.intget("hinting", -1))
v = set_xsettings_value(
b"Xft/RGBA", XSettingsTypeString,
ad.strget("orientation", "none").lower())
v = set_xsettings_value(b"Xft/HintStyle",
XSettingsTypeString,
_get_antialias_hintstyle(ad))
if double_click_distance != (-1, -1):
#some platforms give us a value for each axis,
#but X11 only has one, so take the average
try:
x, y = double_click_distance
if x > 0 and y > 0:
d = iround((x + y) / 2.0)
d = max(1, min(128, d)) #sanitize it a bit
v = set_xsettings_int(b"Net/DoubleClickDistance",
d)
except Exception as e:
log.warn(
"error setting double click distance from %s: %s",
double_click_distance, e)
if k not in old_settings or v != old_settings[k]:
if k == b"xsettings-blob":
self.set_xsettings(v)
elif k == b"resource-manager":
from xpra.x11.gtk_x11.prop import prop_set
p = "RESOURCE_MANAGER"
log("server_settings: setting %s to %s", nonl(p), nonl(v))
prop_set(self.root_window, p, "latin1",
strtobytes(v).decode("latin1"))
else:
log.warn("Warning: unexpected setting '%s'", bytestostr(k))
def capsget(self, capabilities, key, default):
v = capabilities.get(strtobytes(key), default)
if PYTHON3 and isinstance(v, bytes):
v = bytestostr(v)
return v
def get(key, default=None):
return capabilities.get(strtobytes(key), default)
def _test_file_auth(self, mod_name, genauthdata, display_count=0):
#no file, no go:
a = self._init_auth(mod_name)
assert a.requires_challenge()
p = a.get_passwords()
assert not p, "got passwords from %s: %s" % (a, p)
#challenge twice is a fail
assert a.get_challenge(get_digests())
assert not a.get_challenge(get_digests())
assert not a.get_challenge(get_digests())
#muck:
# 0 - OK
# 1 - bad: with warning about newline
# 2 - verify bad passwords
# 3 - verify no password
for muck in (0, 1, 2, 3):
with TempFileContext(prefix=mod_name) as context:
f = context.file
filename = context.filename
with f:
a = self._init_auth(mod_name, filename=filename)
password, filedata = genauthdata(a)
#print("saving password file data='%s' to '%s'" % (filedata, filename))
if muck != 3:
f.write(strtobytes(filedata))
if muck == 1:
f.write(b"\n")
f.flush()
assert a.requires_challenge()
salt, mac = a.get_challenge(get_digests())
assert salt
assert mac in get_digests()
assert mac != "xor"
password = strtobytes(password)
client_salt = strtobytes(uuid.uuid4().hex +
uuid.uuid4().hex)[:len(salt)]
salt_digest = a.choose_salt_digest(get_digests())
assert salt_digest
auth_salt = strtobytes(
gendigest(salt_digest, client_salt, salt))
if muck == 0:
digestmod = get_digest_module(mac)
verify = hmac.HMAC(password,
auth_salt,
digestmod=digestmod).hexdigest()
assert self.capsauth(
a, verify,
client_salt), "%s failed" % a.authenticate
if display_count > 0:
sessions = a.get_sessions()
assert len(sessions) >= 3
displays = sessions[2]
assert len(
displays
) == display_count, "expected %i displays but got %i : %s" % (
display_count, len(sessions), sessions)
assert not self.capsauth(
a, verify, client_salt), "authenticated twice!"
passwords = a.get_passwords()
assert len(
passwords
) == 1, "expected just one password in file, got %i" % len(
passwords)
assert password in passwords
else:
for verify in ("whatever", None, "bad"):
assert not self.capsauth(a, verify, client_salt)
return a
def test_password(self): password = strtobytes(uuid.uuid4().hex) self._test_hmac_auth(password_auth, password, value=password)
def test_bytes(self):
assert strtobytes(b"hello") == b"hello"
def _get_cipher(key, iv):
global backend
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
return Cipher(algorithms.AES(key), modes.CBC(strtobytes(iv)), backend=backend)
def parse_server_capabilities(self):
for c in CLIENT_BASES:
if not c.parse_server_capabilities(self):
log.info("failed to parse server capabilities in %s", c)
return False
c = self.server_capabilities
self.server_session_name = strtobytes(c.rawget("session_name",
b"")).decode("utf-8")
set_name("Xpra", self.session_name or self.server_session_name
or "Xpra")
self.server_platform = c.strget("platform")
self.server_sharing = c.boolget("sharing")
self.server_sharing_toggle = c.boolget("sharing-toggle")
self.server_lock = c.boolget("lock")
self.server_lock_toggle = c.boolget("lock-toggle")
self.server_keyboard = c.boolget("keyboard", True)
self.server_toggle_keyboard_sync = self.server_keyboard and c.boolget(
"toggle_keyboard_sync", True)
self.server_pointer = c.boolget("pointer", True)
self.server_start_new_commands = c.boolget("start-new-commands")
if self.server_start_new_commands:
self.server_xdg_menu = c.dictget("xdg-menu", None)
if self.start_new_commands or self.start_child_new_commands:
if self.server_start_new_commands:
self.after_handshake(self.send_start_new_commands)
else:
log.warn("Warning: cannot start new commands")
log.warn(" the feature is currently disabled on the server")
self.server_commands_info = c.boolget("server-commands-info")
self.server_commands_signals = c.strlistget("server-commands-signals")
self.server_readonly = c.boolget("readonly")
if self.server_readonly and not self.readonly:
log.info("server is read only")
self.readonly = True
if not self.server_keyboard and self.keyboard_helper:
#swallow packets:
def nosend(*_args):
pass
self.keyboard_helper.send = nosend
i = platform_name(
self._remote_platform,
c.strlistget("platform.linux_distribution")
or c.strget("platform.release", ""))
r = self._remote_version
if self._remote_revision:
r += "-r%s" % self._remote_revision
mode = c.strget("server.mode", "server")
bits = c.intget("python.bits", 32)
log.info("Xpra %s server version %s %i-bit", mode, std(r), bits)
if i:
log.info(" running on %s", std(i))
if c.boolget("proxy"):
proxy_hostname = c.strget("proxy.hostname")
proxy_platform = c.strget("proxy.platform")
proxy_release = c.strget("proxy.platform.release")
proxy_version = c.strget("proxy.version")
proxy_version = c.strget("proxy.build.version", proxy_version)
proxy_distro = c.strget("proxy.linux_distribution")
msg = "via: %s proxy version %s" % (platform_name(
proxy_platform, proxy_distro
or proxy_release), std(proxy_version or "unknown"))
if proxy_hostname:
msg += " on '%s'" % std(proxy_hostname)
log.info(msg)
return True
def capsget(self, capabilities, key, default):
v = capabilities.get(strtobytes(key), default)
if sys.version >= '3' and type(v)==bytes:
v = bytestostr(v)
return v
def get_pixbuf_from_data(rgb_data, has_alpha, w, h, rowstride):
data = array.array('B', strtobytes(rgb_data))
return GdkPixbuf.Pixbuf.new_from_data(data, GdkPixbuf.Colorspace.RGB,
has_alpha, 8, w, h, rowstride,
None, None)
from xpra.gtk_common.gobject_util import no_arg_signal, SIGNAL_RUN_LAST
from xpra.gtk_common.gtk_util import GetClipboard, selection_owner_set, selection_add_target, selectiondata_get_selection, selectiondata_get_target, selectiondata_get_data, selectiondata_get_data_type, selectiondata_get_format, selectiondata_set, clipboard_request_contents, set_clipboard_data, PROPERTY_CHANGE_MASK
from xpra.gtk_common.nested_main import NestedMainLoop
from xpra.net.compression import Compressible
from xpra.os_util import WIN32, POSIX, monotonic_time, strtobytes, bytestostr, hexstr, get_hex_uuid, is_X11, is_Wayland
from xpra.util import csv, envint, envbool, repr_ellipsized, typedict, first_time
from xpra.platform.features import CLIPBOARD_GREEDY
MIN_CLIPBOARD_COMPRESSION_SIZE = 512
MAX_CLIPBOARD_PACKET_SIZE = 4 * 1024 * 1024
MAX_CLIPBOARD_RECEIVE_SIZE = envint("XPRA_MAX_CLIPBOARD_RECEIVE_SIZE", -1)
MAX_CLIPBOARD_SEND_SIZE = envint("XPRA_MAX_CLIPBOARD_SEND_SIZE", -1)
from xpra.platform.features import CLIPBOARDS as PLATFORM_CLIPBOARDS
ALL_CLIPBOARDS = [strtobytes(x) for x in PLATFORM_CLIPBOARDS]
CLIPBOARDS = PLATFORM_CLIPBOARDS
CLIPBOARDS_ENV = os.environ.get("XPRA_CLIPBOARDS")
if CLIPBOARDS_ENV is not None:
CLIPBOARDS = CLIPBOARDS_ENV.split(",")
CLIPBOARDS = [strtobytes(x).upper().strip() for x in CLIPBOARDS]
del CLIPBOARDS_ENV
TEST_DROP_CLIPBOARD_REQUESTS = envint("XPRA_TEST_DROP_CLIPBOARD")
STORE_ON_EXIT = envbool("XPRA_CLIPBOARD_STORE_ON_EXIT", True)
DELAY_SEND_TOKEN = envint("XPRA_DELAY_SEND_TOKEN", 100)
LOOP_DISABLE = envbool("XPRA_CLIPBOARD_LOOP_DISABLE", True)
LOOP_PREFIX = os.environ.get("XPRA_CLIPBOARD_LOOP_PREFIX",
"Xpra-Clipboard-Loop-Detection:")
def parse_encoding_caps(self, c):
self.set_encoding(c.strget("encoding", None), None)
#encoding options (filter):
#1: these properties are special cased here because we
#defined their name before the "encoding." prefix convention,
#or because we want to pass default values (zlib/lz4):
for k, ek in {
"initial_quality": "initial_quality",
"quality": "quality",
}.items():
if k in c:
self.encoding_options[ek] = c.intget(k)
for k, ek in {
"zlib": "rgb_zlib",
"lz4": "rgb_lz4",
}.items():
if k in c:
self.encoding_options[ek] = c.boolget(k)
#2: standardized encoding options:
for k in c.keys():
#yaml gives us str..
k = strtobytes(k)
if k.startswith(b"theme.") or k.startswith(b"encoding.icons."):
self.icons_encoding_options[k.replace(b"encoding.icons.",
b"").replace(
b"theme.",
b"")] = c.get(k)
elif k.startswith(b"encoding."):
stripped_k = k[len(b"encoding."):]
if stripped_k in (
b"transparency",
b"rgb_zlib",
b"rgb_lz4",
b"rgb_lzo",
):
v = c.boolget(k)
elif stripped_k in (b"initial_quality", b"initial_speed",
b"min-quality", b"quality", b"min-speed",
b"speed"):
v = c.intget(k)
else:
v = c.get(k)
self.encoding_options[stripped_k] = v
log("encoding options: %s", self.encoding_options)
log("icons encoding options: %s", self.icons_encoding_options)
#handle proxy video: add proxy codec to video helper:
pv = self.encoding_options.boolget("proxy.video")
proxylog("proxy.video=%s", pv)
if pv:
#enabling video proxy:
try:
self.parse_proxy_video()
except Exception:
proxylog.error("failed to parse proxy video", exc_info=True)
sc = self.encoding_options.get("scaling.control", self.scaling_control)
if sc is not None:
#"encoding_options" are exposed via "xpra info",
#so we can't have None values in there (bencoder would choke)
self.default_encoding_options["scaling.control"] = sc
q = self.encoding_options.intget("quality",
self.default_quality) #0.7 onwards:
if q > 0:
self.default_encoding_options["quality"] = q
mq = self.encoding_options.intget("min-quality",
self.default_min_quality)
if mq > 0 and (q <= 0 or q > mq):
self.default_encoding_options["min-quality"] = mq
s = self.encoding_options.intget("speed", self.default_speed)
if s > 0:
self.default_encoding_options["speed"] = s
ms = self.encoding_options.intget("min-speed", self.default_min_speed)
if ms > 0 and (s <= 0 or s > ms):
self.default_encoding_options["min-speed"] = ms
log("default encoding options: %s", self.default_encoding_options)
self.auto_refresh_delay = c.intget("auto_refresh_delay", 0)
#are we going to need a cuda context?
common_encodings = tuple(x for x in self.encodings
if x in self.server_encodings)
from xpra.codecs.loader import has_codec
if "jpeg" in common_encodings and has_codec("enc_nvjpeg"):
from xpra.codecs.cuda_common.cuda_context import get_device_context
self.cuda_device_context = get_device_context(
self.encoding_options)
log.warn("cuda_device_context=%s", self.cuda_device_context)
