[mgcp] Start to look into the MGCP messages and extract the CI

we will need the call identifier for the MDCX and DLCX message
for now we were just assuming it would increment, use som python
to extract the CI from a possible response, also switch back to
a blocking read to test the BSC nat.
neels/jolly/new_handover
Holger Hans Peter Freyther 13 years ago
parent 58df0ea9a0
commit e125d40f66
  1. 28
      openbsc/contrib/mgcp_server.py

@ -25,15 +25,24 @@ def hexdump(src, length=8):
server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
server_socket.bind(("127.0.0.1", MGCP_CALLAGENT_PORT))
server_socket.setblocking(0)
server_socket.setblocking(1)
def send_receive(packet):
last_ci = 1
def send_and_receive(packet):
global last_ci
server_socket.sendto(packet, ("127.0.0.1", MGCP_GATEWAY_PORT))
try:
data, addr = server_socket.recvfrom(4096)
# attempt to store the CI of the response
list = data.split("\n")
for item in list:
if item.startswith("I: "):
last_ci = int(item[3:])
print hexdump(data), addr
except socket.error:
except socket.error, e:
print e
pass
def generate_tid():
@ -42,13 +51,10 @@ def generate_tid():
i = 1
while True:
send_receive(rsip_resp)
send_receive(audit_packet % generate_tid())
send_receive(crcx_packet % generate_tid() )
send_receive(mdcx_packet % (generate_tid(), i))
send_receive(dlcx_packet % (generate_tid(), i))
i = i + 1
send_and_receive(audit_packet % generate_tid())
send_and_receive(crcx_packet % generate_tid() )
send_and_receive(mdcx_packet % (generate_tid(), last_ci))
send_and_receive(dlcx_packet % (generate_tid(), last_ci))
time.sleep(3)

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