def _before_send(self):
super(Ping, self)._before_send()
self._sock = IpSocket(socket.IPPROTO_ICMP)
self._icmp_echo = IcmpEcho()
self._icmp_echo.header.type = ICMP_ECHO
print('PING {0} {1} bytes of data.'.format(self.args.destip,
self._icmp_echo.length))
def _send(self):
if self._icmp_echo.sequence > 0:
time.sleep(1)
self._icmp_echo.sequence += 1
addr = (self.args.destip, 0)
self._icmp_echo.timestamp = int(time.time() * 1000) & 0xffffffff
self._icmp_echo.header.checksum = 0
self._icmp_echo.header.checksum = socket.ntohs(
checksum(self._icmp_echo.dump()))
self._sock.sendto(self._icmp_echo.dump(), addr)
try:
timeout = 2
start_timestamp = time.time()
while timeout > 0:
self._sock.settimeout(timeout)
data, raddr = self._sock.recvfrom(1024)
recv_timestamp = int(time.time() * 1000) & 0xffffffff
if raddr == addr:
iphdr = IpHeader()
iphdr.load(data)
icmp_data = data[iphdr.ihl * 4:]
icmp_echo_reply = IcmpEcho()
icmp_echo_reply.load(icmp_data)
if icmp_echo_reply.header.type == ICMP_ECHOREPLY \
and icmp_echo_reply.id == self._icmp_echo.id \
and icmp_echo_reply.sequence == self._icmp_echo.sequence:
print(
'{0} bytes from {1}: icmp_req={2} ttl={3} time={4} ms'
.format(
len(icmp_data), addr[0],
self._icmp_echo.sequence, iphdr.ttl,
abs(recv_timestamp -
self._icmp_echo.timestamp)))
break
timeout -= time.time() - start_timestamp
if timeout < 0:
raise socket.timeout()
except socket.timeout:
print('timeout')
