def analyze_ip_header(data):
ip_hdr = struct.unpack("!4H4s4s", data[:20])
ver = ip_hdr[0] >> 12 # Shift 12 bits to the right
ihl = (ip_hdr[0] >> 8) & 0x0F # 00001111
tos = ip_hdr[0] & 0x00ff # 0000000011111111
tot_length = ip_hdr[1]
ip_id = ip_hdr[2]
flags = ip_hdr[3] >> 13 # Only going to get the first 3 bits
frag_offset = ip_hdr[3] & 0x1FFFF
src_addr = socket.ntoa(ip_hdr[4])
dst_addr = socket.ntoa(ip_hdr[5])
return
def __http_request(self, url):
try:
payload = {'info_hash': self.torrent.info_hash, 'peer_id': self.peer_id,
'port': self.port, 'uploaded': self.uploaded, 'downloaded': self.downloaded,
'left': self.left, 'event': self.event, 'compact': self.compact, 'numwant': self.compact}
req = requests.get(url, params = payload, timeout = CONNECTION_TIME_OUT)
print "req.url = ", req.url
# print "req : ", req
res = req.content
# print "res type = ", type(res)
# print "tracker response = ", res
res = BEncode(res).parse()
print res
if res.get('peers'):
bpeers = res.get('peers')
blen = len(bpeers)
i = 0
while i < blen:
ip, port = struct.unpack('lH', bpeers[i: i + 6])
# ip = byte_helper.bytes42int(bpeers[i: i + 4])
print "ip before = ", ip, port
ip = socket.ntoa(struct.pack('l', socket.inet_htol(ip)))
print ip
ip_port = (socket.inet_ntoa(bpeers[i: i + 4]), byte_helper.bytes22int(bpeers[i + 4: i + 6]))
print "peer ip port = ", ip_port
self.peers.add(ip_port)
i += 6
except Exception, e:
print "Exception", e
def ip_hdr(data):
ip_hdr = struct.unpack("!6H4s4s", data[:20])
ver = ip_hdr[0] >> 12 #shift 12 bits the data is binary not decimal
ihl = (ip_hdr[0] >>
8) & 0x0f # shif 8 bits and have to remove version so hence logical
tos = ip_hdr[0] & 0x00ff
total_length = ip_hdr[1]
ip_id = ip_hdr[2]
flags = ip_hdr[3] >> 13 # we require only the first 3 bits
frag_offset = ip_hdr[3] & 0x1fff
ip_ttl = ip_hdr[4] >> 8
ip_proto = ip_hdr[4] & 0x00ff
ch_sum = ip_hdr[5]
src_addr = socket.ntoa(ip_hdr[6])
dest_addr = socket.ntoa(ip_hdr[7])
no_frag = flags >> 1
more_frag = flags & 0x1
print "===========================IP Header=============================="
print " Version \t %hu" % ver
print " IHL \t %hu" % ihl
print " TOS \t %hu" % tos
print " Total Length \t %hu" % total_length
print " ID \t %hu" % ip_id
print " No Frag \t %hu" % no_frag
print " More Frag \t %hu" % more_frag
print " Fragment offset \t %hu" % frag_offset
print " TTL \t %hu" % ip_ttl
print " Next Proto \t %hu" % ip_proto
print " CheckSum \t %hu" % ch_sum
print " Source IP \t %s" % src_addr
print " Destination IP \t %s" % dest_addr
if ip_proto == 6: #TCP
next_proto = "TCP"
elif ip_proto == 7: #UDP
next_proto = "UDP"
else:
next_proto = "OTHER"
data = data[20:]
return data, next_proto
def __repr__(self):
return "%s/%s" % (ntoa(pack('I', htonl(self.addr))), ntoa(pack('I', htonl(self.mask))) )
def __repr__(self):
return ntoa(pack('I', htonl(self.addr)))
def __repr__(self):
return "%s/%s" % (ntoa(pack('I', htonl(
self.addr))), ntoa(pack('I', htonl(self.mask))))
def __repr__(self):
return ntoa(pack('I', htonl(self.addr)))
