OVMS3-idf/examples/protocols/http_server/advanced_tests/scripts/test.py

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#!/usr/bin/env python
#
# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Utility for testing the web server. Test cases:
# Assume the device supports 'n' simultaneous open sockets
#
# HTTP Server Tests
#
# 0. Firmware Settings:
# - Create a dormant thread whose sole job is to call httpd_stop() when instructed
# - Measure the following before httpd_start() is called:
# - current free memory
# - current free sockets
# - Measure the same whenever httpd_stop is called
# - Register maximum possible URI handlers: should be successful
# - Register one more URI handler: should fail
# - Deregister on URI handler: should be successful
# - Register on more URI handler: should succeed
# - Register separate handlers for /hello, /hello/type_html. Also
# ensure that /hello/type_html is registered BEFORE /hello. (tests
# that largest matching URI is picked properly)
# - Create URI handler /adder. Make sure it uses a custom free_ctx
# structure to free it up
# 1. Using Standard Python HTTP Client
# - simple GET on /hello (returns Hello World. Ensures that basic
# firmware tests are complete, or returns error)
# - POST on /hello (should fail)
# - PUT on /hello (should fail)
# - simple POST on /echo (returns whatever the POST data)
# - simple PUT on /echo (returns whatever the PUT data)
# - GET on /echo (should fail)
# - simple GET on /hello/type_html (returns Content type as text/html)
# - simple GET on /hello/status_500 (returns HTTP status 500)
# - simple GET on /false_uri (returns HTTP status 404)
# - largest matching URI handler is picked is already verified because
# of /hello and /hello/type_html tests
#
#
# 2. Session Tests
# - Sessions + Pipelining basics:
# - Create max supported sessions
# - On session i,
# - send 3 back-to-back POST requests with data i on /adder
# - read back 3 responses. They should be i, 2i and 3i
# - Tests that
# - pipelining works
# - per-session context is maintained for all supported
# sessions
# - Close all sessions
#
# - Cleanup leftover data: Tests that the web server properly cleans
# up leftover data
# - Create a session
# - POST on /leftover_data with 52 bytes of data (data includes
# \r\n)(the handler only
# reads first 10 bytes and returns them, leaving the rest of the
# bytes unread)
# - GET on /hello (should return 'Hello World')
# - POST on /false_uri with 52 bytes of data (data includes \r\n)
# (should return HTTP 404)
# - GET on /hello (should return 'Hello World')
#
# - Test HTTPd Asynchronous response
# - Create a session
# - GET on /async_data
# - returns 'Hello World!' as a response
# - the handler schedules an async response, which generates a second
# response 'Hello Double World!'
#
# - Spillover test
# - Create max supported sessions with the web server
# - GET /hello on all the sessions (should return Hello World)
# - Create one more session, this should fail
# - GET /hello on all the sessions (should return Hello World)
#
# - Timeout test
# - Create a session and only Send 'GE' on the same (simulates a
# client that left the network halfway through a request)
# - Wait for recv-wait-timeout
# - Server should automatically close the socket
############# TODO TESTS #############
# 3. Stress Tests
#
# - httperf
# - Run the following httperf command:
# httperf --server=10.31.130.126 --wsess=8,50,0.5 --rate 8 --burst-length 2
#
# - The above implies that the test suite will open
# - 8 simultaneous connections with the server
# - the rate of opening the sessions will be 8 per sec. So in our
# case, a new connection will be opened every 0.2 seconds for 1 second
# - The burst length 2 indicates that 2 requests will be sent
# simultaneously on the same connection in a single go
# - 0.5 seconds is the time between sending out 2 bursts
# - 50 is the total number of requests that will be sent out
#
# - So in the above example, the test suite will open 8
# connections, each separated by 0.2 seconds. On each connection
# it will send 2 requests in a single burst. The bursts on a
# single connection will be separated by 0.5 seconds. A total of
# 25 bursts (25 x 2 = 50) will be sent out
# 4. Leak Tests
# - Simple Leak test
# - Simple GET on /hello/restart (returns success, stop web server, measures leaks, restarts webserver)
# - Simple GET on /hello/restart_results (returns the leak results)
# - Leak test with open sockets
# - Open 8 sessions
# - Simple GET on /hello/restart (returns success, stop web server,
# measures leaks, restarts webserver)
# - All sockets should get closed
# - Simple GET on /hello/restart_results (returns the leak results)
import threading
from multiprocessing import Process, Queue
import socket
import time
import argparse
import httplib
import sys
import string
import random
_verbose_ = False
class Session:
def __init__(self, addr, port):
self.client = socket.create_connection((addr, int(port)))
self.client.settimeout(15)
self.target = addr
self.status = 0
self.encoding = ''
self.content_type = ''
self.content_len = 0
def send_err_check(self, request, data=None):
rval = True
try:
self.client.sendall(request);
if data:
self.client.sendall(data)
except socket.error as err:
self.client.close()
print "Socket Error in send :", err
rval = False
return rval
def send_get(self, path, headers=None):
request = "GET " + path + " HTTP/1.1\r\nHost: " + self.target
if headers:
for field, value in headers.iteritems():
request += "\r\n"+field+": "+value
request += "\r\n\r\n"
return self.send_err_check(request)
def send_put(self, path, data, headers=None):
request = "PUT " + path + " HTTP/1.1\r\nHost: " + self.target
if headers:
for field, value in headers.iteritems():
request += "\r\n"+field+": "+value
request += "\r\nContent-Length: " + str(len(data)) +"\r\n\r\n"
return self.send_err_check(request, data)
def send_post(self, path, data, headers=None):
request = "POST " + path + " HTTP/1.1\r\nHost: " + self.target
if headers:
for field, value in headers.iteritems():
request += "\r\n"+field+": "+value
request += "\r\nContent-Length: " + str(len(data)) +"\r\n\r\n"
return self.send_err_check(request, data)
def read_resp_hdrs(self):
try:
state = 'nothing'
resp_read = ''
while True:
char = self.client.recv(1)
if char == '\r' and state == 'nothing':
state = 'first_cr'
elif char == '\n' and state == 'first_cr':
state = 'first_lf'
elif char == '\r' and state == 'first_lf':
state = 'second_cr'
elif char == '\n' and state == 'second_cr':
state = 'second_lf'
else:
state = 'nothing'
resp_read += char
if state == 'second_lf':
break
# Handle first line
line_hdrs = resp_read.splitlines()
line_comp = line_hdrs[0].split()
self.status = line_comp[1]
del line_hdrs[0]
self.encoding = ''
self.content_type = ''
headers = dict()
# Process other headers
for h in range(len(line_hdrs)):
line_comp = line_hdrs[h].split(':')
if line_comp[0] == 'Content-Length':
self.content_len = int(line_comp[1])
if line_comp[0] == 'Content-Type':
self.content_type = line_comp[1].lstrip()
if line_comp[0] == 'Transfer-Encoding':
self.encoding = line_comp[1].lstrip()
if len(line_comp) == 2:
headers[line_comp[0]] = line_comp[1].lstrip()
return headers
except socket.error as err:
self.client.close()
print "Socket Error in recv :", err
return None
def read_resp_data(self):
try:
read_data = ''
if self.encoding != 'chunked':
while len(read_data) != self.content_len:
read_data += self.client.recv(self.content_len)
else:
chunk_data_buf = ''
while (True):
# Read one character into temp buffer
read_ch = self.client.recv(1)
# Check CRLF
if (read_ch == '\r'):
read_ch = self.client.recv(1)
if (read_ch == '\n'):
# If CRLF decode length of chunk
chunk_len = int(chunk_data_buf, 16)
# Keep adding to contents
self.content_len += chunk_len
rem_len = chunk_len
while (rem_len):
new_data = self.client.recv(rem_len)
read_data += new_data
rem_len -= len(new_data)
chunk_data_buf = ''
# Fetch remaining CRLF
if self.client.recv(2) != "\r\n":
# Error in packet
print "Error in chunked data"
return None
if not chunk_len:
# If last chunk
break
continue
chunk_data_buf += '\r'
# If not CRLF continue appending
# character to chunked data buffer
chunk_data_buf += read_ch
return read_data
except socket.error as err:
self.client.close()
print "Socket Error in recv :", err
return None
def close(self):
self.client.close()
def test_val(text, expected, received):
if expected != received:
print " Fail!"
print " [reason] " + text + ":"
print " expected: " + str(expected)
print " received: " + str(received)
return False
return True
class adder_thread (threading.Thread):
def __init__(self, id, dut, port):
threading.Thread.__init__(self)
self.id = id
self.dut = dut
self.depth = 3
self.session = Session(dut, port)
def run(self):
self.response = []
# Pipeline 3 requests
if (_verbose_):
print " Thread: Using adder start " + str(self.id)
for _ in range(self.depth):
self.session.send_post('/adder', str(self.id))
time.sleep(2)
for _ in range(self.depth):
self.session.read_resp_hdrs()
self.response.append(self.session.read_resp_data())
def adder_result(self):
if len(self.response) != self.depth:
print "Error : missing response packets"
return False
for i in range(len(self.response)):
if not test_val("Thread" + str(self.id) + " response[" + str(i) + "]",
str(self.id * (i + 1)), str(self.response[i])):
return False
return True
def close(self):
self.session.close()
def get_hello(dut, port):
# GET /hello should return 'Hello World!'
print "[test] GET /hello returns 'Hello World!' =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("GET", "/hello")
resp = conn.getresponse()
if not test_val("status_code", 200, resp.status):
conn.close()
return False
if not test_val("data", "Hello World!", resp.read()):
conn.close()
return False
if not test_val("data", "application/json", resp.getheader('Content-Type')):
conn.close()
return False
print "Success"
conn.close()
return True
def put_hello(dut, port):
# PUT /hello returns 405'
print "[test] PUT /hello returns 405' =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("PUT", "/hello", "Hello")
resp = conn.getresponse()
if not test_val("status_code", 405, resp.status):
conn.close()
return False
print "Success"
conn.close()
return True
def post_hello(dut, port):
# POST /hello returns 405'
print "[test] POST /hello returns 404' =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("POST", "/hello", "Hello")
resp = conn.getresponse()
if not test_val("status_code", 405, resp.status):
conn.close()
return False
print "Success"
conn.close()
return True
def post_echo(dut, port):
# POST /echo echoes data'
print "[test] POST /echo echoes data' =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("POST", "/echo", "Hello")
resp = conn.getresponse()
if not test_val("status_code", 200, resp.status):
conn.close()
return False
if not test_val("data", "Hello", resp.read()):
conn.close()
return False
print "Success"
conn.close()
return True
def put_echo(dut, port):
# PUT /echo echoes data'
print "[test] PUT /echo echoes data' =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("PUT", "/echo", "Hello")
resp = conn.getresponse()
if not test_val("status_code", 200, resp.status):
conn.close()
return False
if not test_val("data", "Hello", resp.read()):
conn.close()
return False
print "Success"
conn.close()
return True
def get_echo(dut, port):
# GET /echo returns 404'
print "[test] GET /echo returns 405' =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("GET", "/echo")
resp = conn.getresponse()
if not test_val("status_code", 405, resp.status):
conn.close()
return False
print "Success"
conn.close()
return True
def get_hello_type(dut, port):
# GET /hello/type_html returns text/html as Content-Type'
print "[test] GET /hello/type_html has Content-Type of text/html =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("GET", "/hello/type_html")
resp = conn.getresponse()
if not test_val("status_code", 200, resp.status):
conn.close()
return False
if not test_val("data", "Hello World!", resp.read()):
conn.close()
return False
if not test_val("data", "text/html", resp.getheader('Content-Type')):
conn.close()
return False
print "Success"
conn.close()
return True
def get_hello_status(dut, port):
# GET /hello/status_500 returns status 500'
print "[test] GET /hello/status_500 returns status 500 =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("GET", "/hello/status_500")
resp = conn.getresponse()
if not test_val("status_code", 500, resp.status):
conn.close()
return False
print "Success"
conn.close()
return True
def get_false_uri(dut, port):
# GET /false_uri returns status 404'
print "[test] GET /false_uri returns status 404 =>",
conn = httplib.HTTPConnection(dut, int(port))
conn.request("GET", "/false_uri")
resp = conn.getresponse()
if not test_val("status_code", 404, resp.status):
conn.close()
return False
print "Success"
conn.close()
return True
def parallel_sessions_adder(dut, port, max_sessions):
# POSTs on /adder in parallel sessions
print "[test] POST {pipelined} on /adder in " + str(max_sessions) + " sessions =>",
t = []
# Create all sessions
for i in xrange(max_sessions):
t.append(adder_thread(i, dut, port))
for i in xrange(len(t)):
t[i].start()
for i in xrange(len(t)):
t[i].join()
res = True
for i in xrange(len(t)):
if not test_val("Thread" + str(i) + " Failed", t[i].adder_result(), True):
res = False
t[i].close()
if (res):
print "Success"
return res
def async_response_test(dut, port):
# Test that an asynchronous work is executed in the HTTPD's context
# This is tested by reading two responses over the same session
print "[test] Test HTTPD Work Queue (Async response) =>",
s = Session(dut, port)
s.send_get('/async_data')
s.read_resp_hdrs()
if not test_val("First Response", "Hello World!", s.read_resp_data()):
s.close()
return False
s.read_resp_hdrs()
if not test_val("Second Response", "Hello Double World!", s.read_resp_data()):
s.close()
return False
s.close()
print "Success"
return True
def leftover_data_test(dut, port):
# Leftover data in POST is purged (valid and invalid URIs)
print "[test] Leftover data in POST is purged (valid and invalid URIs) =>",
s = httplib.HTTPConnection(dut + ":" + port)
s.request("POST", url='/leftover_data', body="abcdefghijklmnopqrstuvwxyz\r\nabcdefghijklmnopqrstuvwxyz")
resp = s.getresponse()
if not test_val("Partial data", "abcdefghij", resp.read()):
s.close()
return False
s.request("GET", url='/hello')
resp = s.getresponse()
if not test_val("Hello World Data", "Hello World!", resp.read()):
s.close()
return False
s.request("POST", url='/false_uri', body="abcdefghijklmnopqrstuvwxyz\r\nabcdefghijklmnopqrstuvwxyz")
resp = s.getresponse()
if not test_val("False URI Status", str(404), str(resp.status)):
s.close()
return False
resp.read()
s.request("GET", url='/hello')
resp = s.getresponse()
if not test_val("Hello World Data", "Hello World!", resp.read()):
s.close()
return False
s.close()
print "Success"
return True
def spillover_session(dut, port, max_sess):
# Session max_sess_sessions + 1 is rejected
print "[test] Session max_sess_sessions (" + str(max_sess) + ") + 1 is rejected =>",
s = []
_verbose_ = True
for i in xrange(max_sess + 1):
if (_verbose_):
print "Executing " + str(i)
try:
a = httplib.HTTPConnection(dut + ":" + port)
a.request("GET", url='/hello')
resp = a.getresponse()
if not test_val("Connection " + str(i), "Hello World!", resp.read()):
a.close()
break
s.append(a)
except:
if (_verbose_):
print "Connection " + str(i) + " rejected"
a.close()
break
# Close open connections
for a in s:
a.close()
# Check if number of connections is equal to max_sess
print ["Fail","Success"][len(s) == max_sess]
return (len(s) == max_sess)
def recv_timeout_test(dut, port):
print "[test] Timeout occurs if partial packet sent =>",
s = Session(dut, port)
s.client.sendall("GE")
s.read_resp_hdrs()
resp = s.read_resp_data()
if not test_val("Request Timeout", "Server closed this connection", resp):
s.close()
return False
s.close()
print "Success"
return True
def packet_size_limit_test(dut, port, test_size):
print "[test] send size limit test =>",
retry = 5
while (retry):
retry -= 1
print "data size = ", test_size
s = httplib.HTTPConnection(dut + ":" + port)
random_data = ''.join(string.printable[random.randint(0,len(string.printable))-1] for _ in range(test_size))
path = "/echo"
s.request("POST", url=path, body=random_data)
resp = s.getresponse()
if not test_val("Error", "200", str(resp.status)):
if test_val("Error", "408", str(resp.status)):
print "Data too large to be allocated"
test_size = test_size/10
else:
print "Unexpected error"
s.close()
print "Retry..."
continue
resp = resp.read()
result = (resp == random_data)
if not result:
test_val("Data size", str(len(random_data)), str(len(resp)))
s.close()
print "Retry..."
continue
s.close()
print "Success"
return True
print "Failed"
return False
def code_500_server_error_test(dut, port):
print "[test] 500 Server Error test =>",
s = Session(dut, port)
s.client.sendall("abcdefgh\0")
s.read_resp_hdrs()
resp = s.read_resp_data()
# Presently server sends back 400 Bad Request
#if not test_val("Server Error", "500", s.status):
#s.close()
#return False
if not test_val("Server Error", "400", s.status):
s.close()
return False
s.close()
print "Success"
return True
def code_501_method_not_impl(dut, port):
print "[test] 501 Method Not Implemented =>",
s = Session(dut, port)
path = "/hello"
s.client.sendall("ABC " + path + " HTTP/1.1\r\nHost: " + dut + "\r\n\r\n")
s.read_resp_hdrs()
resp = s.read_resp_data()
# Presently server sends back 400 Bad Request
#if not test_val("Server Error", "501", s.status):
#s.close()
#return False
if not test_val("Server Error", "400", s.status):
s.close()
return False
s.close()
print "Success"
return True
def code_505_version_not_supported(dut, port):
print "[test] 505 Version Not Supported =>",
s = Session(dut, port)
path = "/hello"
s.client.sendall("GET " + path + " HTTP/2.0\r\nHost: " + dut + "\r\n\r\n")
s.read_resp_hdrs()
resp = s.read_resp_data()
if not test_val("Server Error", "505", s.status):
s.close()
return False
s.close()
print "Success"
return True
def code_400_bad_request(dut, port):
print "[test] 400 Bad Request =>",
s = Session(dut, port)
path = "/hello"
s.client.sendall("XYZ " + path + " HTTP/1.1\r\nHost: " + dut + "\r\n\r\n")
s.read_resp_hdrs()
resp = s.read_resp_data()
if not test_val("Client Error", "400", s.status):
s.close()
return False
s.close()
print "Success"
return True
def code_404_not_found(dut, port):
print "[test] 404 Not Found =>",
s = Session(dut, port)
path = "/dummy"
s.client.sendall("GET " + path + " HTTP/1.1\r\nHost: " + dut + "\r\n\r\n")
s.read_resp_hdrs()
resp = s.read_resp_data()
if not test_val("Client Error", "404", s.status):
s.close()
return False
s.close()
print "Success"
return True
def code_405_method_not_allowed(dut, port):
print "[test] 405 Method Not Allowed =>",
s = Session(dut, port)
path = "/hello"
s.client.sendall("POST " + path + " HTTP/1.1\r\nHost: " + dut + "\r\n\r\n")
s.read_resp_hdrs()
resp = s.read_resp_data()
if not test_val("Client Error", "405", s.status):
s.close()
return False
s.close()
print "Success"
return True
def code_408_req_timeout(dut, port):
print "[test] 408 Request Timeout =>",
s = Session(dut, port)
s.client.sendall("POST /echo HTTP/1.1\r\nHost: " + dut + "\r\nContent-Length: 10\r\n\r\nABCD")
s.read_resp_hdrs()
resp = s.read_resp_data()
if not test_val("Client Error", "408", s.status):
s.close()
return False
s.close()
print "Success"
return True
def code_411_length_required(dut, port):
print "[test] 411 Length Required =>",
s = Session(dut, port)
path = "/echo"
s.client.sendall("POST " + path + " HTTP/1.1\r\nHost: " + dut + "\r\nContent-Type: text/plain\r\nTransfer-Encoding: chunked\r\n\r\n")
s.read_resp_hdrs()
resp = s.read_resp_data()
# Presently server sends back 400 Bad Request
#if not test_val("Client Error", "411", s.status):
#s.close()
#return False
if not test_val("Client Error", "400", s.status):
s.close()
return False
s.close()
print "Success"
return True
def send_getx_uri_len(dut, port, length):
s = Session(dut, port)
method = "GET "
version = " HTTP/1.1\r\n"
path = "/"+"x"*(length - len(method) - len(version) - len("/"))
s.client.sendall(method)
time.sleep(1)
s.client.sendall(path)
time.sleep(1)
s.client.sendall(version + "Host: " + dut + "\r\n\r\n")
s.read_resp_hdrs()
resp = s.read_resp_data()
s.close()
return s.status
def code_414_uri_too_long(dut, port, max_uri_len):
print "[test] 414 URI Too Long =>",
status = send_getx_uri_len(dut, port, max_uri_len)
if not test_val("Client Error", "404", status):
return False
status = send_getx_uri_len(dut, port, max_uri_len + 1)
if not test_val("Client Error", "414", status):
return False
print "Success"
return True
def send_postx_hdr_len(dut, port, length):
s = Session(dut, port)
path = "/echo"
host = "Host: " + dut
custom_hdr_field = "\r\nCustom: "
custom_hdr_val = "x"*(length - len(host) - len(custom_hdr_field) - len("\r\n\r\n") + len("0"))
request = "POST " + path + " HTTP/1.1\r\n" + host + custom_hdr_field + custom_hdr_val + "\r\n\r\n"
s.client.sendall(request[:length/2])
time.sleep(1)
s.client.sendall(request[length/2:])
hdr = s.read_resp_hdrs()
resp = s.read_resp_data()
s.close()
if "Custom" in hdr:
return (hdr["Custom"] == custom_hdr_val), resp
return False, s.status
def code_431_hdr_too_long(dut, port, max_hdr_len):
print "[test] 431 Header Too Long =>",
res, status = send_postx_hdr_len(dut, port, max_hdr_len)
if not res:
return False
res, status = send_postx_hdr_len(dut, port, max_hdr_len + 1)
if not test_val("Client Error", "431", status):
return False
print "Success"
return True
def test_upgrade_not_supported(dut, port):
print "[test] Upgrade Not Supported =>",
s = Session(dut, port)
path = "/hello"
s.client.sendall("OPTIONS * HTTP/1.1\r\nHost:" + dut + "\r\nUpgrade: TLS/1.0\r\nConnection: Upgrade\r\n\r\n");
s.read_resp_hdrs()
resp = s.read_resp_data()
if not test_val("Client Error", "200", s.status):
s.close()
return False
s.close()
print "Success"
return True
if __name__ == '__main__':
########### Execution begins here...
# Configuration
# Max number of threads/sessions
max_sessions = 7
max_uri_len = 512
max_hdr_len = 512
parser = argparse.ArgumentParser(description='Run HTTPD Test')
parser.add_argument('-4','--ipv4', help='IPv4 address')
parser.add_argument('-6','--ipv6', help='IPv6 address')
parser.add_argument('-p','--port', help='Port')
args = vars(parser.parse_args())
dut4 = args['ipv4']
dut6 = args['ipv6']
port = args['port']
dut = dut4
_verbose_ = True
print "### Basic HTTP Client Tests"
get_hello(dut, port)
post_hello(dut, port)
put_hello(dut, port)
post_echo(dut, port)
get_echo(dut, port)
put_echo(dut, port)
get_hello_type(dut, port)
get_hello_status(dut, port)
get_false_uri(dut, port)
print "### Error code tests"
code_500_server_error_test(dut, port)
code_501_method_not_impl(dut, port)
code_505_version_not_supported(dut, port)
code_400_bad_request(dut, port)
code_404_not_found(dut, port)
code_405_method_not_allowed(dut, port)
code_408_req_timeout(dut, port)
code_414_uri_too_long(dut, port, max_uri_len)
code_431_hdr_too_long(dut, port, max_hdr_len)
test_upgrade_not_supported(dut, port)
# Not supported yet (Error on chunked request)
###code_411_length_required(dut, port)
print "### Sessions and Context Tests"
parallel_sessions_adder(dut, port, max_sessions)
leftover_data_test(dut, port)
async_response_test(dut, port)
spillover_session(dut, port, max_sessions)
recv_timeout_test(dut, port)
packet_size_limit_test(dut, port, 50*1024)
get_hello(dut, port)
sys.exit()