class SIPClient:
'''Send standard SIP request, receive reply & start audio thread'''
def __init__(self):
self.log = Logger(LOG_FILE)
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.sock.connect((PROXY[0], int(PROXY[1])))
self.sock.settimeout(0.05)
def receive(self):
try: # Check if the proxy send an answer to our request
data = self.sock.recv(1024).decode()
self.log.receive(PROXY, data) # Write in the log file
return data
except socket.timeout:
return '' # The server hasn't sent us new data
except socket.error: # The server is off
self.log.error('No server listening at {} port {}'.format(*PROXY))
raise SystemExit
def send(self, msg): # Send and create event in the log
if 'sdp' not in msg: # SDP don't need a blank line
msg = msg + '\r\n\r\n' # Add to original msg a blank line
self.sock.send(msg.encode())
self.log.send(PROXY, msg)
def do_register(self, expires): # Send REGISTER & create HASH response
header = 'REGISTER sip:{}:{} SIP/2.0\r\nExpires: {}'
header = header.format(MY_USER, SERVER[1], expires) # User, port, exp
self.send(header)
resp = self.receive()
if not resp or '401' not in resp: # Check authorization response
return # We don't continue the registration process
nonce = re.search(r'nonce="(.+)"', resp).group(1) # Search nonce value
md5 = hashlib.md5((nonce + MY_PASSWD).encode()).hexdigest()
resp = '{}\r\nAuthorization: Digest nonce="{}", response="{}"'
self.send(resp.format(header.strip(), nonce, md5)) # Add auth header
self.receive()
def do_invite(self, user): # Send invite, check resp, send ACK,start audio
header = 'INVITE sip:{} SIP/2.0\r\nContent-Type: application/sdp'
body = '\r\n\r\nv=0\r\no={} {}\r\ns=PTAVI\r\nt=0\r\nm=audio {} RTP'
self.send((header + body).format(user, MY_USER, SERVER[0], RTPORT))
codes = [] # Store each response from Proxy here
data = self.receive()
while data:
codes.append(data.split()[1]) # Store only response code
data = self.receive()
if codes == ['100', '180', '200']: # Must receive Trying,Ringing & OK
self.send('ACK sip:{} SIP/2.0'.format(user))
system('./mp32rtp -i {} -p {} < {}'.format(SERVER[0], RTPORT, AUD))
def do_bye(self, user): # Send bye request & finish log
self.send('BYE sip:{} SIP/2.0'.format(user))
self.receive()
def do_method(self, type_method, user): # !(REGISTER,INVITE,BYE)
self.send('{} sip:{} SIP/2.0'.format(type_method.upper(), user))
self.receive()
def __init__(self):
self.log = Logger(LOG_FILE)
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.sock.connect((PROXY[0], int(PROXY[1])))
self.sock.settimeout(0.05)
