def make_protocol(self):
#figure out where we read from and write to:
if self.input_filename=="-":
#disable stdin buffering:
self._input = os.fdopen(sys.stdin.fileno(), 'rb', 0)
setbinarymode(self._input.fileno())
else:
self._input = open(self.input_filename, 'rb')
if self.output_filename=="-":
#disable stdout buffering:
self._output = os.fdopen(sys.stdout.fileno(), 'wb', 0)
setbinarymode(self._output.fileno())
else:
self._output = open(self.output_filename, 'wb')
#stdin and stdout wrapper:
conn = TwoFileConnection(self._output, self._input, abort_test=None, target=self.name, info=self.name, close_cb=self.net_stop)
conn.timeout = 0
protocol = Protocol(gobject, conn, self.process_packet, get_packet_cb=self.get_packet)
try:
protocol.enable_encoder("rencode")
except Exception as e:
log.warn("failed to enable rencode: %s", e)
protocol.enable_encoder("bencode")
protocol.enable_compressor("none")
protocol.large_packets = self.large_packets
return protocol
def make_protocol(self):
#figure out where we read from and write to:
if self.input_filename == "-":
#disable stdin buffering:
self._input = os.fdopen(sys.stdin.fileno(), 'rb', 0)
setbinarymode(self._input.fileno())
else:
self._input = open(self.input_filename, 'rb')
if self.output_filename == "-":
#disable stdout buffering:
self._output = os.fdopen(sys.stdout.fileno(), 'wb', 0)
setbinarymode(self._output.fileno())
else:
self._output = open(self.output_filename, 'wb')
#stdin and stdout wrapper:
conn = TwoFileConnection(self._output,
self._input,
abort_test=None,
target=self.name,
info=self.name,
close_cb=self.net_stop)
conn.timeout = 0
protocol = Protocol(gobject,
conn,
self.process_packet,
get_packet_cb=self.get_packet)
try:
protocol.enable_encoder("rencode")
except Exception as e:
log.warn("failed to enable rencode: %s", e)
protocol.enable_encoder("bencode")
protocol.enable_compressor("none")
protocol.large_packets = self.large_packets
return protocol
def make_protocol(self):
#figure out where we read from and write to:
if self.input_filename == "-":
#disable stdin buffering:
self._input = os.fdopen(sys.stdin.fileno(), 'rb', 0)
setbinarymode(self._input.fileno())
else:
self._input = open(self.input_filename, 'rb')
if self.output_filename == "-":
#disable stdout buffering:
self._output = os.fdopen(sys.stdout.fileno(), 'wb', 0)
setbinarymode(self._output.fileno())
else:
self._output = open(self.output_filename, 'wb')
#stdin and stdout wrapper:
conn = TwoFileConnection(self._output,
self._input,
abort_test=None,
target=self.name,
socktype=self.name,
close_cb=self.net_stop)
conn.timeout = 0
protocol = Protocol(self,
conn,
self.process_packet,
get_packet_cb=self.get_packet)
setup_fastencoder_nocompression(protocol)
protocol.large_packets = self.large_packets
return protocol
def make_protocol(self):
#make a connection using the process stdin / stdout
conn = TwoFileConnection(self.process.stdin, self.process.stdout, abort_test=self.abort_test, target=self.description, socktype=self.description, close_cb=self.subprocess_exit)
conn.timeout = 0
protocol = Protocol(self, conn, self.process_packet, get_packet_cb=self.get_packet)
setup_fastencoder_nocompression(protocol)
protocol.large_packets = self.large_packets
return protocol
def make_protocol(self):
#make a connection using the process stdin / stdout
conn = TwoFileConnection(self.process.stdin, self.process.stdout, abort_test=self.abort_test, target=self.description, socktype=self.description, close_cb=self.subprocess_exit)
conn.timeout = 0
protocol = Protocol(self, conn, self.process_packet, get_packet_cb=self.get_packet)
setup_fastencoder_nocompression(protocol)
protocol.large_packets = self.large_packets
return protocol
def make_protocol(self):
#make a connection using the process stdin / stdout
conn = TwoFileConnection(self.process.stdin, self.process.stdout, abort_test=None, target=self.description, info=self.description, close_cb=self.subprocess_exit)
conn.timeout = 0
protocol = Protocol(gobject, conn, self.process_packet, get_packet_cb=self.get_packet)
#we assume the other end has the same encoders (which is reasonable):
#TODO: fallback to bencoder
try:
protocol.enable_encoder("rencode")
except Exception as e:
log.warn("failed to enable rencode: %s", e)
protocol.enable_encoder("bencode")
#we assume this is local, so no compression:
protocol.enable_compressor("none")
protocol.large_packets = self.large_packets
return protocol
def make_protocol(self):
#make a connection using the process stdin / stdout
conn = TwoFileConnection(self.process.stdin,
self.process.stdout,
abort_test=self.abort_test,
target=self.description,
socktype=self.description,
close_cb=self.subprocess_exit)
conn.timeout = 0
protocol = Protocol(self,
conn,
self.process_packet,
get_packet_cb=self.get_packet)
if LOCAL_ALIASES:
protocol.send_aliases = LOCAL_SEND_ALIASES
protocol.receive_aliases = LOCAL_RECEIVE_ALIASES
setup_fastencoder_nocompression(protocol)
protocol.large_packets = self.large_packets
return protocol
def make_protocol(self):
#figure out where we read from and write to:
if self.input_filename=="-":
#disable stdin buffering:
self._input = os.fdopen(sys.stdin.fileno(), 'rb', 0)
setbinarymode(self._input.fileno())
else:
self._input = open(self.input_filename, 'rb')
if self.output_filename=="-":
#disable stdout buffering:
self._output = os.fdopen(sys.stdout.fileno(), 'wb', 0)
setbinarymode(self._output.fileno())
else:
self._output = open(self.output_filename, 'wb')
#stdin and stdout wrapper:
conn = TwoFileConnection(self._output, self._input, abort_test=None, target=self.name, socktype=self.name, close_cb=self.net_stop)
conn.timeout = 0
protocol = Protocol(self, conn, self.process_packet, get_packet_cb=self.get_packet)
setup_fastencoder_nocompression(protocol)
protocol.large_packets = self.large_packets
return protocol
def make_protocol(self):
#make a connection using the process stdin / stdout
conn = TwoFileConnection(self.process.stdin,
self.process.stdout,
abort_test=None,
target=self.description,
info=self.description,
close_cb=self.subprocess_exit)
conn.timeout = 0
protocol = Protocol(gobject,
conn,
self.process_packet,
get_packet_cb=self.get_packet)
#we assume the other end has the same encoders (which is reasonable):
#TODO: fallback to bencoder
try:
protocol.enable_encoder("rencode")
except Exception as e:
log.warn("failed to enable rencode: %s", e)
protocol.enable_encoder("bencode")
#we assume this is local, so no compression:
protocol.enable_compressor("none")
protocol.large_packets = self.large_packets
return protocol
def run_proxy(parser, opts, script_file, args, mode):
from xpra.server.proxy import XpraProxy
assert "gtk" not in sys.modules
if mode in ("_proxy_start", "_shadow_start"):
#we must use a subprocess to avoid messing things up - yuk
cmd = [script_file]
if mode=="_proxy_start":
cmd.append("start")
assert len(args)==1, "proxy/shadow-start: expected 1 argument but got %s" % len(args)
display_name = args[0]
else:
assert mode=="_shadow_start"
cmd.append("shadow")
if len(args)==1:
#display_name was provided:
display_name = args[0]
else:
display_name = guess_X11_display()
cmd += args
if opts.start_child and len(opts.start_child)>0:
for x in opts.start_child:
cmd.append("--start-child=%s" % x)
if opts.exit_with_children:
cmd.append("--exit-with-children")
if opts.exit_with_client or mode=="_shadow_start":
cmd.append("--exit-with-client")
def setsid():
os.setsid()
Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE, preexec_fn=setsid)
dotxpra = DotXpra()
start = time.time()
while dotxpra.server_state(display_name, 1)!=DotXpra.LIVE:
if time.time()-start>5:
warn("server failed to start after %.1f seconds - sorry!" % (time.time()-start))
return
time.sleep(0.10)
server_conn = connect_or_fail(pick_display(parser, opts, args))
app = XpraProxy(TwoFileConnection(sys.stdout, sys.stdin, info="stdin/stdout"), server_conn)
signal.signal(signal.SIGINT, app.quit)
signal.signal(signal.SIGTERM, app.quit)
app.run()
return 0
def ssh_exec_connect_to(display_desc, opts=None, debug_cb=None, ssh_fail_cb=ssh_connect_failed):
if not ssh_fail_cb:
ssh_fail_cb = ssh_connect_failed
sshpass_command = None
try:
cmd = list(display_desc["full_ssh"])
kwargs = {}
env = display_desc.get("env")
kwargs["stderr"] = sys.stderr
if WIN32:
from subprocess import CREATE_NEW_PROCESS_GROUP, CREATE_NEW_CONSOLE, STARTUPINFO, STARTF_USESHOWWINDOW
startupinfo = STARTUPINFO()
startupinfo.dwFlags |= STARTF_USESHOWWINDOW
startupinfo.wShowWindow = 0 #aka win32.con.SW_HIDE
flags = CREATE_NEW_PROCESS_GROUP | CREATE_NEW_CONSOLE
kwargs.update({
"startupinfo" : startupinfo,
"creationflags" : flags,
"stderr" : PIPE,
})
elif not display_desc.get("exit_ssh", False) and not OSX:
kwargs["start_new_session"] = True
remote_xpra = display_desc["remote_xpra"]
assert remote_xpra
socket_dir = display_desc.get("socket_dir")
proxy_command = display_desc["proxy_command"] #ie: "_proxy_start"
display_as_args = display_desc["display_as_args"] #ie: "--start=xterm :10"
remote_cmd = ""
for x in remote_xpra:
if not remote_cmd:
check = "if"
else:
check = "elif"
if x=="xpra":
#no absolute path, so use "which" to check that the command exists:
pc = ['%s which "%s" > /dev/null 2>&1; then' % (check, x)]
else:
pc = ['%s [ -x %s ]; then' % (check, x)]
pc += [x] + proxy_command + [shellquote(x) for x in display_as_args]
if socket_dir:
pc.append("--socket-dir=%s" % socket_dir)
remote_cmd += " ".join(pc)+";"
remote_cmd += "else echo \"no run-xpra command found\"; exit 1; fi"
if INITENV_COMMAND:
remote_cmd = INITENV_COMMAND + ";" + remote_cmd
#how many times we need to escape the remote command string
#depends on how many times the ssh command is parsed
nssh = sum(int(x=="ssh") for x in cmd)
if nssh>=2 and MAGIC_QUOTES:
for _ in range(nssh):
remote_cmd = shlex.quote(remote_cmd)
else:
remote_cmd = "'%s'" % remote_cmd
cmd.append("sh -c %s" % remote_cmd)
if debug_cb:
debug_cb("starting %s tunnel" % str(cmd[0]))
#non-string arguments can make Popen choke,
#instead of lazily converting everything to a string, we validate the command:
for x in cmd:
if not isinstance(x, str):
raise InitException("argument is not a string: %s (%s), found in command: %s" % (x, type(x), cmd))
password = display_desc.get("password")
if password and not display_desc.get("is_putty", False):
from xpra.platform.paths import get_sshpass_command
sshpass_command = get_sshpass_command()
if sshpass_command:
#sshpass -e ssh ...
cmd.insert(0, sshpass_command)
cmd.insert(1, "-e")
if env is None:
env = os.environ.copy()
env["SSHPASS"] = password
#the password will be used by ssh via sshpass,
#don't try to authenticate again over the ssh-proxy connection,
#which would trigger warnings if the server does not require
#authentication over unix-domain-sockets:
opts.password = None
del display_desc["password"]
if env:
kwargs["env"] = env
if is_debug_enabled("ssh"):
log.info("executing ssh command: %s" % (" ".join("\"%s\"" % x for x in cmd)))
child = Popen(cmd, stdin=PIPE, stdout=PIPE, **kwargs)
except OSError as e:
raise InitExit(EXIT_SSH_FAILURE,
"Error running ssh command '%s': %s" % (" ".join("\"%s\"" % x for x in cmd), e))
def abort_test(action):
""" if ssh dies, we don't need to try to read/write from its sockets """
e = child.poll()
if e is not None:
had_connected = conn.input_bytecount>0 or conn.output_bytecount>0
if had_connected:
error_message = "cannot %s using SSH" % action
else:
error_message = "SSH connection failure"
sshpass_error = None
if sshpass_command:
sshpass_error = {
1 : "Invalid command line argument",
2 : "Conflicting arguments given",
3 : "General runtime error",
4 : "Unrecognized response from ssh (parse error)",
5 : "Invalid/incorrect password",
6 : "Host public key is unknown. sshpass exits without confirming the new key.",
}.get(e)
if sshpass_error:
error_message += ": %s" % sshpass_error
if debug_cb:
debug_cb(error_message)
if ssh_fail_cb:
ssh_fail_cb(error_message)
if "ssh_abort" not in display_desc:
display_desc["ssh_abort"] = True
if not had_connected:
log.error("Error: SSH connection to the xpra server failed")
if sshpass_error:
log.error(" %s", sshpass_error)
else:
log.error(" check your username, hostname, display number, firewall, etc")
display_name = display_desc["display_name"]
log.error(" for server: %s", display_name)
else:
log.error("The SSH process has terminated with exit code %s", e)
cmd_info = " ".join(display_desc["full_ssh"])
log.error(" the command line used was:")
log.error(" %s", cmd_info)
raise ConnectionClosedException(error_message) from None
def stop_tunnel():
if POSIX:
#on posix, the tunnel may be shared with other processes
#so don't kill it... which may leave it behind after use.
#but at least make sure we close all the pipes:
for name,fd in {
"stdin" : child.stdin,
"stdout" : child.stdout,
"stderr" : child.stderr,
}.items():
try:
if fd:
fd.close()
except Exception as e:
print("error closing ssh tunnel %s: %s" % (name, e))
if not display_desc.get("exit_ssh", False):
#leave it running
return
try:
if child.poll() is None:
child.terminate()
except Exception as e:
print("error trying to stop ssh tunnel process: %s" % e)
host = display_desc["host"]
port = display_desc.get("ssh-port", 22)
username = display_desc.get("username")
display = display_desc.get("display")
info = {
"host" : host,
"port" : port,
}
from xpra.net.bytestreams import TwoFileConnection
conn = TwoFileConnection(child.stdin, child.stdout,
abort_test, target=(host, port),
socktype="ssh", close_cb=stop_tunnel, info=info)
conn.endpoint = host_target_string("ssh", username, host, port, display)
conn.timeout = 0 #taken care of by abort_test
conn.process = (child, "ssh", cmd)
if kwargs.get("stderr")==PIPE:
def stderr_reader():
errs = []
while child.poll() is None:
try:
v = child.stderr.readline()
except OSError:
log("stderr_reader()", exc_info=True)
break
if not v:
log("SSH EOF on stderr of %s", cmd)
break
s = bytestostr(v.rstrip(b"\n\r"))
if s:
errs.append(s)
if errs:
log.warn("remote SSH stderr:")
for e in errs:
log.warn(" %s", e)
start_thread(stderr_reader, "ssh-stderr-reader", daemon=True)
return conn
try:
if child.poll() is None:
#only supported on win32 since Python 2.7
if hasattr(child, "terminate"):
child.terminate()
elif hasattr(os, "kill"):
os.kill(child.pid, signal.SIGTERM)
else:
raise Exception(
"cannot find function to kill subprocess")
except Exception, e:
print("error trying to stop ssh tunnel process: %s" % e)
return TwoFileConnection(child.stdin,
child.stdout,
abort_test,
target=display_name,
info=dtype,
close_cb=stop_tunnel)
elif dtype == "unix-domain":
sockdir = DotXpra(display_desc["socket_dir"])
sock = socket.socket(socket.AF_UNIX)
sock.settimeout(5)
sockfile = sockdir.socket_path(display_desc["display"])
return _socket_connect(sock, sockfile, display_name, dtype)
elif dtype == "tcp":
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(10)
tcp_endpoint = (display_desc["host"], display_desc["port"])
return _socket_connect(sock, tcp_endpoint, display_name, dtype)