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import stl_path
from trex_stl_lib.api import *
import time
import json
# simple packet creation
def create_pkt (size, direction):
ip_range = {'src': {'start': "10.0.0.1", 'end': "10.0.0.254"},
'dst': {'start': "8.0.0.1", 'end': "8.0.0.254"}}
if (direction == 0):
src = ip_range['src']
dst = ip_range['dst']
else:
src = ip_range['dst']
dst = ip_range['src']
vm = [
# src
STLVmFlowVar(name="src",min_value=src['start'],max_value=src['end'],size=4,op="inc"),
STLVmWrFlowVar(fv_name="src",pkt_offset= "IP.src"),
# dst
STLVmFlowVar(name="dst",min_value=dst['start'],max_value=dst['end'],size=4,op="inc"),
STLVmWrFlowVar(fv_name="dst",pkt_offset= "IP.dst"),
# checksum
STLVmFixIpv4(offset = "IP")
]
base = Ether()/IP()/UDP()
pad = max(0, size-len(base)) * 'x'
return STLPktBuilder(pkt = base/pad,
vm = vm)
def simple_burst ():
# create client
c = STLClient()
passed = True
try:
# turn this on for some information
#c.set_verbose("high")
# create two streams
s1 = STLStream(packet = create_pkt(200, 0),
mode = STLTXCont(pps = 100))
# second stream with a phase of 1ms (inter stream gap)
s2 = STLStream(packet = create_pkt(200, 1),
isg = 1000,
mode = STLTXCont(pps = 100))
# connect to server
c.connect()
# prepare our ports (my machine has 0 <--> 1 with static route)
c.reset(ports = [0, 1])
# add both streams to ports
c.add_streams(s1, ports = [0])
c.add_streams(s2, ports = [1])
# clear the stats before injecting
c.clear_stats()
# choose rate and start traffic for 10 seconds on 5 mpps
print("Running 100 Mbps on ports 0, 1 for 10 seconds...")
c.start(ports = [0, 1], mult = "100mbps", duration = 10)
# block until done
c.wait_on_traffic(ports = [0, 1])
# read the stats after the test
stats = c.get_stats()
print(json.dumps(stats[0], indent = 4, separators=(',', ': '), sort_keys = True))
print(json.dumps(stats[1], indent = 4, separators=(',', ': '), sort_keys = True))
lost_a = stats[0]["opackets"] - stats[1]["ipackets"]
lost_b = stats[1]["opackets"] - stats[0]["ipackets"]
print("\npackets lost from 0 --> 1: {0} pkts".format(lost_a))
print("packets lost from 1 --> 0: {0} pkts".format(lost_b))
if (lost_a == 0) and (lost_b == 0):
passed = True
else:
passed = False
except STLError as e:
passed = False
print(e)
finally:
c.disconnect()
if passed:
print("\nTest has passed :-)\n")
else:
print("\nTest has failed :-(\n")
while True:
# run the tests
simple_burst()
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