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42 lines
1.2 KiB
42 lines
1.2 KiB
import operator
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import socket
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from time import strftime;
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def SipSocket(host='localhost', port=5300):
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so = socket.socket()
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so.connect((host, port))
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return so
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def login(so, uname='scclient', passwd='clientpwd', locn='The basement',
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seqno=0):
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port = so.getpeername()[1]
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if port == 5300:
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resp = send(so, '9300CN%s|CO%s|CP%s|' % (uname, passwd, locn), seqno)
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print "Received", repr(resp)
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print "Verified: ", verify(resp)
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else:
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raise "Logging in is only support for the raw transport on port 5300"
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def send(so, msg, seqno=0):
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if seqno:
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msg += 'AY' + str(seqno)[0] + 'AZ'
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msg += ('%04X' % calculate_cksum(msg))
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msg += '\r'
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print 'Sending', repr(msg)
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so.send(msg)
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resp = so.recv(1000)
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return resp, verify(resp)
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def calculate_cksum(msg):
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return (-reduce(operator.add, map(ord, msg)) & 0xFFFF)
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def sipdate():
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return(strftime("%Y%m%d %H%M%S"))
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def verify(msg):
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if msg[-1] == '\r': msg = msg[:-2]
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if msg[-6:-4] == 'AZ':
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cksum = calculate_cksum(msg[:-4])
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return (msg[-4:] == ('%04X' % cksum))
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# If there's no checksum, then the message is ok
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return True
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