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@gauravssnl
Forked from pyos/ping.py
Created Dec 14, 2016
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import time
import random
import struct
import select
import socket
def chk(data):
x = sum(x << 8 if i % 2 else x for i, x in enumerate(data)) & 0xFFFFFFFF
x = (x >> 16) + (x & 0xFFFF)
x = (x >> 16) + (x & 0xFFFF)
return struct.pack('<H', ~x & 0xFFFF)
def ping(addr, timeout=1, number=1, data=b''):
with socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_ICMP) as conn:
payload = struct.pack('!HH', random.randrange(0, 65536), number) + data
conn.connect((addr, 80))
conn.sendall(b'\x08\0' + chk(b'\x08\0\0\0' + payload) + payload)
start = time.time()
while select.select([conn], [], [], max(0, start + timeout - time.time()))[0]:
data = conn.recv(65536)
if len(data) < 20 or len(data) < struct.unpack_from('!xxH', data)[0]:
continue
if data[20:] == b'\0\0' + chk(b'\0\0\0\0' + payload) + payload:
return time.time() - start
if __name__ == '__main__':
print(ping('google.com'))
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