/usr/share/pyshared/d_rats/sessionmgr.py is in d-rats 0.3.3-3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright 2008 Dan Smith <dsmith@danplanet.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import time
import threading
import os
import struct
import socket
from ddt2 import DDT2EncodedFrame
import transport
from sessions import base, control, stateful, stateless
from sessions import file, form, sock, sniff
class SessionManager(object):
def set_comm(self, pipe, **kwargs):
self.pipe = pipe
if self.tport:
self.tport.disable()
self.tport = transport.Transporter(self.pipe,
inhandler=self.incoming,
**kwargs)
def set_call(self, callsign):
self.station = callsign
def __init__(self, pipe, station, **kwargs):
self.pipe = self.tport = None
self.station = station
self.sniff_session = None
self.last_frame = 0
self.sessions = {}
self.session_cb = {}
self.set_comm(pipe, **kwargs)
self._sid_counter = 0
self._sid_lock = threading.Lock()
self.control = control.ControlSession()
self._register_session(self.control, "CQCQCQ", "new,out")
self._stations_heard = {}
def get_heard_stations(self):
return dict(self._stations_heard)
def manual_heard_station(self, station):
self._stations_heard[station] = time.time()
def fire_session_cb(self, session, reason):
for f,d in self.session_cb.items():
try:
f(d, reason, session)
except Exception, e:
print "Exception in session CB: %s" % e
def register_session_cb(self, function, data):
self.session_cb[function] = data
for i,s in self.sessions.items():
self.fire_session_cb(s, "new,existing")
def shutdown(self, force=False):
if force:
self.tport.disable()
if self.sessions.has_key(self.control._id):
del self.sessions[self.control._id]
for s in self.sessions.values():
print "Stopping session `%s'" % s.name
s.close(force)
if not force:
self.tport.disable()
def incoming(self, frame):
self.last_frame = time.time()
if frame.s_station not in ["!"]:
self._stations_heard[frame.s_station] = time.time()
if self.sniff_session is not None:
self.sessions[self.sniff_session].handler(frame)
if frame.d_station != "CQCQCQ" and \
frame.d_station != self.station and \
frame.session != 1:
# Not CQ, not us, and not chat
print "Received frame for station `%s'" % frame.d_station
return
elif frame.s_station == self.station:
# Either there is another station using our callsign, or
# this packet arrived back at us due to a loop
print "Received looped frame"
return
if not frame.session in self.sessions.keys():
print "Incoming frame for unknown session `%i'" % frame.session
return
session = self.sessions[frame.session]
if session.stateless == False and \
session._st != frame.s_station:
print "Received frame from invalid station `%s' (expecting `%s'" % (frame.s_station, session._st)
return
if session.handler:
session.handler(frame)
else:
session.inq.enqueue(frame)
session.notify()
print "Received block %i:%i for session `%s'" % (frame.seq,
frame.type,
session.name)
def outgoing(self, session, block):
self.last_frame = time.time()
if not block.d_station:
block.d_station = session._st
block.s_station = self.station
if session._rs:
block.session = session._rs
else:
block.session = session._id
self.tport.send_frame(block)
def _get_new_session_id(self):
self._sid_lock.acquire()
if self._sid_counter >= 255:
for id in range(0, 255):
if id not in self.sessions.keys():
self._sid_counter = id
else:
id = self._sid_counter
self._sid_counter += 1
self._sid_lock.release()
return id
def _register_session(self, session, dest, reason):
id = self._get_new_session_id()
if id is None:
# FIXME
print "No free slots? I can't believe it!"
session._sm = self
session._id = id
session._st = dest
self.sessions[id] = session
self.fire_session_cb(session, reason)
return id
def _deregister_session(self, id):
if self.sessions.has_key(id):
self.fire_session_cb(self.sessions[id], "end")
try:
del self.sessions[id]
except Exception, e:
print "No session %s to deregister" % id
def start_session(self, name, dest=None, cls=None, **kwargs):
if not cls:
if dest:
s = stateful.StatefulSession(name)
else:
s = stateless.StatelessSession(name)
dest = "CQCQCQ"
else:
s = cls(name, **kwargs)
s.set_state(base.ST_SYNC)
id = self._register_session(s, dest, "new,out")
if dest != "CQCQCQ":
if not self.control.new_session(s):
self._deregister_session(id)
return s
def set_sniffer_session(self, id):
self.sniff_session = id
def stop_session(self, session):
for id, s in self.sessions.items():
if session.name == s.name:
self.tport.flush_blocks(id)
if session.get_state() != base.ST_CLSD:
self.control.end_session(session)
self._deregister_session(id)
session.close()
return True
return False
def end_session(self, id):
try:
del self.sessions[id]
except Exception, e:
print "Unable to deregister session"
def get_session(self, rid=None, rst=None, lid=None):
if not (rid or rst or lid):
print "get_station() with no selectors!"
return None
for s in self.sessions.values():
if rid and s._rs != rid:
continue
if rst and s._st != rst:
continue
if lid and s._id != lid:
continue
return s
return None
if __name__ == "__main__":
#p = transport.TestPipe(dst="KI4IFW")
import comm
import sys
import sessions
#if sys.argv[1] == "KI4IFW":
# p = comm.SerialDataPath(("/dev/ttyUSB0", 9600))
#else:
# p = comm.SerialDataPath(("/dev/ttyUSB0", 38400))
p = comm.SocketDataPath(("localhost", 9000))
#p.make_fake_data("SOMEONE", "CQCQCQ")
p.connect()
sm = SessionManager(p, sys.argv[1])
s = sm.start_session("chat", dest="CQCQCQ", cls=sessions.ChatSession)
def cb(data, args):
print "---------[ CHAT DATA ]------------"
s.register_cb(cb)
s.write("This is %s online" % sys.argv[1])
if sys.argv[1] == "KI4IFW":
S = sm.start_session("xfer", "KI4IFW", cls=sessions.FileTransferSession)
S.send_file("inputdialog.py")
else:
def h(data, reason, session):
print "Session CB: %s" % reason
if reason == "new,in":
print "Receiving file"
t = threading.Thread(target=session.recv_file,
args=("/tmp",))
t.setDaemon(True)
t.start()
print "Done"
sm.register_session_cb(h, None)
try:
while True:
time.sleep(30)
except Exception, e:
print "------- Closing"
sm.shutdown()
# blocks = s.recv_blocks()
# for b in blocks:
# print "Chat message: %s: %s" % (b.get_info()[2], b.get_data())
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