#!/usr/bin/env python3

import sys, os
import hashlib
from subprocess import Popen, PIPE

str2 = "test_test" * (1 << 20)
str1 = "Test_Test!"

src = os.getenv("TCP_SRC", "127.0.0.1")
dst = os.getenv("TCP_DST", "127.0.0.1")
sport = os.getenv("TCP_SPORT", "12345")
dport = os.getenv("TCP_DPORT", "54321")

print(sys.argv[1])
args = [
    sys.argv[1], "--addr", src, "--port", sport, "--seq", "555", "--next",
    "--addr", dst, "--port", dport, "--seq", "666", "--reverse", "--",
    "./tcp-test.py"
]

p1 = Popen(args + ["dst"], stdout=PIPE, stdin=PIPE)

args.remove("--reverse")

p2 = Popen(args + ["src"], stdout=PIPE, stdin=PIPE)

p1.stdout.read(5)
p2.stdout.read(5)
p1.stdin.write("start")
p2.stdin.write("start")

p1.stdin.write(str1)
p1.stdin.close()
p2.stdin.write(str2)
p2.stdin.close()

s = p1.stdout.read()
m = hashlib.md5()
m.update(str2)
str2 = m.hexdigest()

if str2 != eval(s):
    print("FAIL", repr(str2), repr(s))
    sys.exit(5)

s = p1.stdout.read()
m = hashlib.md5()
m.update(str1)
str1 = m.hexdigest()

s = p2.stdout.read()
if str1 != eval(s):
    print("FAIL", repr(str1), s)
    sys.exit(5)

if p1.wait():
    sys.exit(1)
if p2.wait():
    sys.exit(1)

print("PASS")