moth/pollster/pollster.py

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#!/usr/bin/env python3
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#test
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import os
import re
import io
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import sys
import time
import socket
import traceback
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from ctf import config
from ctf import pointscli
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DEBUG = False
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POLL_INTERVAL = config.get('pollster', 'poll_interval')
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IP_DIR = config.get('pollster', 'heartbeat_dir')
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REPORT_PATH = config.get('pollster', 'results')
SOCK_TIMEOUT = config.get('pollster', 'poll_timeout')
def socket_poll(ip, port, msg, prot, max_recv=1):
''' Connect via socket to the specified <ip>:<port> using the
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specified <prot>, send the specified <msg> and return the
response or None if something went wrong. <max_recvs> specifies
how many times to read from the socket (default to once). '''
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# create a socket
try:
sock = socket.socket(socket.AF_INET, prot)
except Exception as e:
print('pollster: create socket failed (%s)' % e)
traceback.print_exc()
return None
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sock.settimeout(SOCK_TIMEOUT)
# connect
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try:
sock.connect((ip, port))
except socket.timeout as e:
print('pollster: attempt to connect to %s:%d timed out (%s)' % (ip, port, e))
traceback.print_exc()
return None
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except Exception as e:
print('pollster: attempt to connect to %s:%d failed (%s)' % (ip, port, e))
traceback.print_exc()
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return None
# send something
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sock.send(msg)
# get a response
resp = []
try:
# read from the socket until <max_recv> responses or read,
# a timeout occurs, the socket closes, or some other exception
# is raised
for i in range(max_recv):
data = sock.recv(1024)
if len(data) == 0:
break
resp.append(data)
except socket.timeout as e:
print('pollster: timed out waiting for a response from %s:%d (%s)' % (ip, port, e))
traceback.print_exc()
except Exception as e:
print('pollster: receive from %s:%d failed (%s)' % (ip, port, e))
traceback.print_exc()
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sock.close()
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if len(resp) == 0:
return None
return b''.join(resp)
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# PUT POLLS FUNCTIONS HERE
# Each function should take an IP address and return a team name or None
# if (a) the service is not up, (b) it doesn't return a valid team name.
def poll_fingerd(ip):
''' Poll the fingerd service. Returns None or a team name. '''
resp = socket_poll(ip, 79, b'flag\n', socket.SOCK_STREAM)
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if resp is None:
return None
return resp.strip(b'\r\n')
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def poll_noted(ip):
''' Poll the noted service. Returns None or a team name. '''
resp = socket_poll(ip, 4000, b'rflag\n', socket.SOCK_STREAM)
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if resp is None:
return None
return resp.strip(b'\r\n')
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def poll_catcgi(ip):
''' Poll the cat.cgi web service. Returns None or a team name. '''
request = bytes('GET /cat.cgi/flag HTTP/1.1\r\nHost: %s\r\n\r\n' % ip, 'ascii')
resp = socket_poll(ip, 80, request, socket.SOCK_STREAM, 3)
if resp is None:
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return None
content = resp.split(b'\r\n\r\n')
if len(content) < 3:
return None
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content = content[1].split(b'\r\n')
try:
content_len = int(content[0])
except Exception as e:
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return None
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if content_len <= 0:
return None
return content[1].strip(b'\r\n')
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def poll_tftpd(ip):
''' Poll the tftp service. Returns None or a team name. '''
resp = socket_poll(ip, 69, b'\x00\x01' + b'flag' + b'\x00' + b'octet' + b'\x00', socket.SOCK_DGRAM)
if resp is None:
return None
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if len(resp) <= 5:
return None
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resp = resp.split(b'\n')[0]
# ack
_ = socket_poll(ip, 69, b'\x00\x04' + resp[2:4], socket.SOCK_DGRAM, 0)
return resp[4:].strip(b'\r\n')
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# PUT POLL FUNCTIONS IN HERE OR THEY WONT BE POLLED
POLLS = {
'fingerd' : poll_fingerd,
'noted' : poll_noted,
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'catcgi' : poll_catcgi,
'tftpd' : poll_tftpd,
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}
ip_re = re.compile('(\d{1,3}\.){3}\d{1,3}')
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poll_no = 0
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# loop forever
while True:
t_start = time.time()
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# gather the list of IPs to poll
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ips = os.listdir(IP_DIR)
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out = io.StringIO()
out.write(config.start_html('Team Service Availability'))
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for ip in ips:
# check file name format is ip
if ip_re.match(ip) is None:
continue
# remove the file
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try:
os.remove(os.path.join(IP_DIR, ip))
except Exception as e:
print('pollster: could not remove %s' % os.path.join(IP_DIR, ip))
traceback.print_exc()
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results = {}
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if DEBUG is True:
print('ip: %s' % ip)
if out is not None:
out.write('<h2>%s</h2>\n' % ip)
out.write('<table class="pollster">\n<thead><tr><td>Service Name</td></td>')
out.write('<td>Flag Holder</td></tr></thead>\n')
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# perform polls
for service,func in POLLS.items():
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try:
team = func(ip).decode('utf-8')
except:
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team = 'dirtbags'
if DEBUG is True:
print('\t%s - %s' % (service, team))
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if out is not None:
out.write('<tr><td>%s</td><td>%s</td>\n' % (service, team))
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pointscli.submit('svc.' + service, team, 1)
if out is not None:
out.write('</table>\n')
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if DEBUG is True:
print('+-----------------------------------------+')
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out.write('<p>Poll number: %d</p>' % poll_no)
poll_no += 1
t_end = time.time()
exec_time = int(t_end - t_start)
sleep_time = POLL_INTERVAL - exec_time
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if out is not None:
out.write(config.end_html())
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open(REPORT_PATH, 'w').write(out.getvalue())
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# sleep until its time to poll again
time.sleep(sleep_time)
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