[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.
diff --git a/openbsc/contrib/mgcp_server.py b/openbsc/contrib/mgcp_server.py
index 88963f3..ae8a6e2 100755
--- a/openbsc/contrib/mgcp_server.py
+++ b/openbsc/contrib/mgcp_server.py
@@ -25,15 +25,24 @@
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 @@
-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)