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# Test UDP reception when there are multiple incoming UDP packets that need to be
# queued internally in the TCP/IP stack.
import socket
NUM_NEW_SOCKETS = 4
NUM_PACKET_BURSTS = 6
NUM_PACKET_GROUPS = 5
TOTAL_PACKET_BURSTS = NUM_NEW_SOCKETS * NUM_PACKET_BURSTS
# The tast passes if more than 75% of packets are received in each group.
PACKET_RECV_THRESH = 0.75 * TOTAL_PACKET_BURSTS
PORT = 8000
# Server
def instance0():
recv_count = {i: 0 for i in range(NUM_PACKET_GROUPS)}
multitest.globals(IP=multitest.get_network_ip())
multitest.next()
for i in range(NUM_NEW_SOCKETS):
print("test socket", i)
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(socket.getaddrinfo("0.0.0.0", PORT + i)[0][-1])
s.settimeout(0.250)
multitest.broadcast("server ready")
for burst in range(NUM_PACKET_BURSTS):
# Wait for all packets to be sent, without receiving any yet.
multitest.wait("data sent burst={}".format(burst))
# Try to receive all packets (they should be waiting in the queue).
for group in range(NUM_PACKET_GROUPS):
try:
data, addr = s.recvfrom(1000)
except:
continue
recv_burst, recv_group = data.split(b":")
recv_burst = int(recv_burst)
recv_group = int(recv_group)
if recv_burst == burst:
recv_count[recv_group] += 1
# Inform the client that all data was received.
multitest.broadcast("data received burst={}".format(burst))
s.close()
# Check how many packets were received.
for group, count in recv_count.items():
if count >= PACKET_RECV_THRESH:
print("pass group={}".format(group))
else:
print("fail group={} received={}%".format(group, 100 * count // TOTAL_PACKET_BURSTS))
# Client
def instance1():
multitest.next()
for i in range(NUM_NEW_SOCKETS):
print("test socket", i)
ai = socket.getaddrinfo(IP, PORT + i)[0][-1]
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
multitest.wait("server ready")
for burst in range(NUM_PACKET_BURSTS):
# Send a bunch of packets all in a row.
for group in range(NUM_PACKET_GROUPS):
s.sendto(b"%d:%d" % (burst, group), ai)
# Inform the server that the data has been sent.
multitest.broadcast("data sent burst={}".format(burst))
# Wait for the server to finish receiving.
multitest.wait("data received burst={}".format(burst))
s.close()
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