61 lines
2.2 KiB
Python
Executable File
61 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python
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# Simple server for mgcp... send audit, receive response..
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import socket, time
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MGCP_GATEWAY_PORT = 2427
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MGCP_CALLAGENT_PORT = 2727
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rsip_resp = """200 321321332\r\n"""
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audit_packet = """AUEP %d 13@mgw MGCP 1.0\r\n"""
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crcx_packet = """CRCX %d 14@mgw MGCP 1.0\r\nC: 4a84ad5d25f\r\nL: p:20, a:GSM-EFR, nt:IN\r\nM: recvonly\r\n"""
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dlcx_packet = """DLCX %d 14@mgw MGCP 1.0\r\nC: 4a84ad5d25f\r\nI: %d\r\n"""
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mdcx_packet = """MDCX %d 14@mgw MGCP 1.0\r\nC: 4a84ad5d25f\r\nI: %d\r\nL: p:20, a:GSM-EFR, nt:IN\r\nM: recvonly\r\n\r\nv=0\r\no=- 258696477 0 IN IP4 172.16.1.107\r\ns=-\r\nc=IN IP4 172.16.1.107\r\nt=0 0\r\nm=audio 6666 RTP/AVP 127\r\na=rtpmap:127 GSM-EFR/8000/1\r\na=ptime:20\r\na=recvonly\r\nm=image 4402 udptl t38\r\na=T38FaxVersion:0\r\na=T38MaxBitRate:14400\r\n"""
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def hexdump(src, length=8):
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"""Recipe is from http://code.activestate.com/recipes/142812/"""
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result = []
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digits = 4 if isinstance(src, unicode) else 2
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for i in xrange(0, len(src), length):
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s = src[i:i+length]
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hexa = b' '.join(["%0*X" % (digits, ord(x)) for x in s])
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text = b''.join([x if 0x20 <= ord(x) < 0x7F else b'.' for x in s])
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result.append( b"%04X %-*s %s" % (i, length*(digits + 1), hexa, text) )
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return b'\n'.join(result)
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server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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server_socket.bind(("127.0.0.1", MGCP_CALLAGENT_PORT))
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server_socket.setblocking(1)
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last_ci = 1
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def send_and_receive(packet):
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global last_ci
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server_socket.sendto(packet, ("127.0.0.1", MGCP_GATEWAY_PORT))
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try:
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data, addr = server_socket.recvfrom(4096)
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# attempt to store the CI of the response
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list = data.split("\n")
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for item in list:
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if item.startswith("I: "):
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last_ci = int(item[3:])
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print hexdump(data), addr
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except socket.error, e:
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print e
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pass
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def generate_tid():
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import random
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return random.randint(0, 65123)
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while True:
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send_and_receive(audit_packet % generate_tid())
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send_and_receive(crcx_packet % generate_tid() )
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send_and_receive(mdcx_packet % (generate_tid(), last_ci))
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send_and_receive(dlcx_packet % (generate_tid(), last_ci))
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time.sleep(3)
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