C4/SIP/acstest.py

   1 import operator
   2 import socket
   3 from time import strftime;
   4
   5 def SipSocket(host='localhost', port=5300):
   6     so = socket.socket()
   7     so.connect((host, port))
   8     return so
   9
  10 def login(so, uname='scclient', passwd='clientpwd', locn='The basement',
  11           seqno=0):
  12     port = so.getpeername()[1]
  13     if port == 5300:
  14         resp = send(so, '9300CN%s|CO%s|CP%s|' % (uname, passwd, locn), seqno)
  15         print "Received", repr(resp)
  16         print "Verified: ", verify(resp)
  17     else:
  18         raise "Logging in is only support for the raw transport on port 5300"
  19
  20 def send(so, msg, seqno=0):
  21     if seqno:
  22         msg += 'AY' + str(seqno)[0] + 'AZ'
  23         msg += ('%04X' % calculate_cksum(msg))
  24     msg += '\r'
  25     print 'Sending', repr(msg)
  26     so.send(msg)
  27     resp = so.recv(1000)
  28     return resp, verify(resp)
  29
  30 def calculate_cksum(msg):
  31     return (-reduce(operator.add, map(ord, msg)) & 0xFFFF)
  32
  33 def sipdate():
  34     return(strftime("%Y%m%d    %H%M%S"))
  35
  36 def verify(msg):
  37     if msg[-1] == '\r': msg = msg[:-2]
  38     if msg[-6:-4] == 'AZ':
  39         cksum = calculate_cksum(msg[:-4])
  40         return (msg[-4:] == ('%04X' % cksum))
  41     # If there's no checksum, then the message is ok
  42     return True