def run(self):
event = threading.Event()
while not self.server.wantshutdown:
if __debug__ and TRACE:
print self.getName() + ": About to call accept"
try:
transport = None
event.clear()
# blocking wait for new connection to come in
sock, peeraddr = self.listen.accept()
# ask if we allow this connection
msg = Server.Message(Server.Message.CMD_NEW_ACCEPT_REQUEST, self.responsequeue, peeraddr)
self.requestqueue.put(msg)
resp = self.responsequeue.get()
assert resp.cmd == resp.CMD_NEW_ACCEPT_RESPONSE
ok = resp.data
if not ok:
self.log("Connection from " + ` peeraddr ` + " not accepted")
sock.close()
continue
# startup ssh stuff
self.log("Connection from " + ` peeraddr ` + " accepted")
transport = paramiko.Transport(sock)
transport.add_server_key(self.server.ssh_server_key)
transport.setDaemon(True)
srvr = myServer(peeraddr, self)
transport.start_server(event, srvr)
except:
if __debug__ and TRACE:
print self.getName() + ": Exception in accept block\n" + guihelper.formatexception()
self.logexception("Exception in accept", sys.exc_info())
if transport is not None:
del transport
sock.close()
continue
# wait for it to become an SSH connection
event.wait()
if not event.isSet() or not transport.is_active():
self.log("Connection from " + ` peeraddr ` + " didn't do SSH negotiation")
transport.close()
sock.close()
continue
if __debug__ and TRACE:
print self.getName() + ": SSH connection from " + ` peeraddr `
self.log("SSH negotiated from " + ` peeraddr `)
chan = None
try:
chan = transport.accept()
serverchan = ServerChannel(chan, peeraddr, srvr.bf_auth_username)
serverchan.XMLRPCLoop(self)
except:
self.logexception("Exception in XMLRPCLoop", sys.exc_info())
if chan is not None:
chan.close()
del chan
if transport is not None:
transport.close()
del transport
msg = Server.Message(Server.Message.CMD_CONNECTION_CLOSE, None, peeraddr)
self.requestqueue.put(msg)
self.log("Connection from " + ` peeraddr ` + " closed")
def logexception(self, str, excinfo):
if __debug__ and TRACE:
print "exception %s\n%s" % (str, guihelper.formatexception(excinfo))
self.log(str)
msg = Server.Message(Server.Message.CMD_LOG_EXCEPTION, data=excinfo)
self.requestqueue.put(msg)
def run(self):
event=threading.Event()
while not self.server.wantshutdown:
if __debug__ and TRACE: print self.getName()+": About to call accept"
try:
transport=None
event.clear()
# blocking wait for new connection to come in
sock, peeraddr = self.listen.accept()
# ask if we allow this connection
msg=Server.Message(Server.Message.CMD_NEW_ACCEPT_REQUEST, self.responsequeue, peeraddr)
self.requestqueue.put(msg)
resp=self.responsequeue.get()
assert resp.cmd==resp.CMD_NEW_ACCEPT_RESPONSE
ok=resp.data
if not ok:
self.log("Connection from "+`peeraddr`+" not accepted")
sock.close()
continue
# startup ssh stuff
self.log("Connection from "+`peeraddr`+" accepted")
transport=paramiko.Transport(sock)
transport.add_server_key(self.server.ssh_server_key)
transport.setDaemon(True)
srvr=myServer(peeraddr, self)
transport.start_server(event,srvr)
except:
if __debug__ and TRACE: print self.getName()+": Exception in accept block\n"+guihelper.formatexception()
self.logexception("Exception in accept", sys.exc_info())
if transport is not None: del transport
sock.close()
continue
# wait for it to become an SSH connection
event.wait()
if not event.isSet() or not transport.is_active():
self.log("Connection from "+`peeraddr`+" didn't do SSH negotiation")
transport.close()
sock.close()
continue
if __debug__ and TRACE: print self.getName()+": SSH connection from "+`peeraddr`
self.log("SSH negotiated from "+`peeraddr`)
chan=None
try:
chan=transport.accept()
serverchan=ServerChannel(chan,peeraddr,srvr.bf_auth_username)
serverchan.XMLRPCLoop(self)
except:
self.logexception("Exception in XMLRPCLoop", sys.exc_info())
if chan is not None:
chan.close()
del chan
if transport is not None:
transport.close()
del transport
msg=Server.Message(Server.Message.CMD_CONNECTION_CLOSE, None, peeraddr)
self.requestqueue.put(msg)
self.log("Connection from "+`peeraddr`+" closed")
def __init__(self, chanid, peeraddr, username):
self.chan=chanid
self.peeraddr=peeraddr
self.username=username
paramiko.Channel.__init__(self, chanid)
def readall(self, amount):
result=""
while amount:
l=self.chan.recv(amount)
if len(l)==0:
return result
result+=l
amount-=len(l)
return result
def XMLRPCLoop(self, conn):
"""Main loop that deals with the XML-RPC data
@param conn: The connectionthread object we are working for
"""
while True:
try:
length=int(self.readall(8))
except ValueError:
return
xml=self.readall(length)
response=conn.processxmlrpcrequest(xml, self.peeraddr,
self.username)
self.chan.sendall( ("%08d" % (len(response),))+response)
class myServer (paramiko.ServerInterface) :
def __init__(self, peeraddr, onbehalfof):
self.event = threading.Event()
self.peeraddr=peeraddr
self.onbehalfof=onbehalfof
def get_allowed_auths(self, username):
return "password"
def check_auth_password(self, username, password):
self.bf_auth_username="******"
conn=self.onbehalfof
conn.log("Checking authentication for user "+`username`)
msg=Server.Message(Server.Message.CMD_NEW_USER_REQUEST, conn.responsequeue,
self.peeraddr, data=(username,password))
conn.requestqueue.put(msg)
resp=conn.responsequeue.get()
assert resp.cmd==resp.CMD_NEW_USER_RESPONSE
if hasattr(resp, 'exception'):
conn.logexception("Exception while checking authentication",resp.exception)
return paramiko.AUTH_FAILED
if resp.data:
conn.log("Credentials ok for user "+`username`)
self.bf_auth_username=username
return paramiko.AUTH_SUCCESSFUL
conn.log("Credentials not accepted for user "+`username`)
return paramiko.AUTH_FAILED
def check_channel_request(self, kind, chanid):
if kind == 'bitfling':
return paramiko.OPEN_SUCCEEDED
return paramiko.OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED
class Server (threading.Thread) :
class Message :
"""A message between a connection thread and the server object, or vice versa"""
CMD_LOG=0
CMD_LOG_EXCEPTION=1
CMD_NEW_ACCEPT_REQUEST=2
CMD_NEW_ACCEPT_RESPONSE=3
CMD_NEW_USER_REQUEST=4
CMD_NEW_USER_RESPONSE=5
CMD_XMLRPC_REQUEST=6
CMD_XMLRPC_RESPONSE=7
CMD_CONNECTION_CLOSE=8
def __init__(self, cmd, respondqueue=None, clientaddr=None, data=None):
self.cmd=cmd
self.respondqueue=respondqueue
self.clientaddr=clientaddr
self.data=data
def __repr__(self):
d=`self.data`
if len(d)>40:
d=d[:40]
str=`self.cmd`
for i in dir(self):
if i.startswith("CMD_") and getattr(self, i)==self.cmd:
str=i
break
return "Message: cmd=%s data=%s" % (str, d)
"""A message between a connection thread and the server object, or vice versa"""
class ConnectionThread (threading.Thread) :
def __init__(self, server, listen, queue, name):
"""Constructor
@param server: reference to server object
@param listen: socket object that is in listening state
@param queue: the queue object to send messages to
@param name: name of this thread"""
threading.Thread.__init__(self)
self.setDaemon(True)
self.setName(name)
self.responsequeue=Queue.Queue()
self.server=server
self.requestqueue=queue
self.listen=listen
def log(self, str):
now=time.time()
t=time.localtime(now)
timestr="&%d:%02d:%02d.%03d" % ( t[3], t[4], t[5], int((now-int(now))*1000))
msg=Server.Message(Server.Message.CMD_LOG, data="%s: %s: %s" % (timestr, self.getName(), str))
self.requestqueue.put(msg)
def logexception(self, str, excinfo):
if __debug__ and TRACE: print "exception %s\n%s" % (str, guihelper.formatexception(excinfo))
self.log(str)
msg=Server.Message(Server.Message.CMD_LOG_EXCEPTION, data=excinfo)
self.requestqueue.put(msg)
def run(self):
def logexception(self, str, excinfo):
if __debug__ and TRACE: print "exception %s\n%s" % (str, guihelper.formatexception(excinfo))
self.log(str)
msg=Server.Message(Server.Message.CMD_LOG_EXCEPTION, data=excinfo)
self.requestqueue.put(msg)