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#!/usr/bin/env python3
#
# SPDX-License-Identifier: GPL-2.0
#
import sys, os, os.path, getopt
import socket, time
import subprocess
import select
def read(sock, n):
buf = b''
while len(buf) < n:
rem = n - len(buf)
try: s = sock.recv(rem)
except (socket.error) as e: return b''
buf += s
return buf
def send(sock, s):
total = len(s)
count = 0
while count < total:
try: n = sock.send(s)
except (socket.error) as e: n = 0
if n == 0:
return count;
count += n
return count
SERVER_PORT = 12877
MAX_PORTS = 2
serverPort = SERVER_PORT
serverSocket = None
# create passive socket
serverSocket = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
try: serverSocket.bind(('::1', 0))
except socket.error as msg:
print('bind fails: ' + str(msg))
sn = serverSocket.getsockname()
serverPort = sn[1]
cmdStr = ("./tcp_client.py %d &") % (serverPort)
os.system(cmdStr)
buf = b''
n = 0
while n < 500:
buf += b'.'
n += 1
serverSocket.listen(MAX_PORTS)
readList = [serverSocket]
while True:
readyRead, readyWrite, inError = \
select.select(readList, [], [], 2)
if len(readyRead) > 0:
waitCount = 0
for sock in readyRead:
if sock == serverSocket:
(clientSocket, address) = serverSocket.accept()
address = str(address[0])
readList.append(clientSocket)
else:
sock.settimeout(1);
s = read(sock, 1000)
n = send(sock, buf)
sock.close()
serverSocket.close()
sys.exit(0)
else:
print('Select timeout!')
sys.exit(1)
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