#!/usr/bin/env python

coding:utf-8
import os, sys, socket, struct, select, time
From /usr/include/linux/icmp.h; your milage may vary.
ICMP_ECHO_REQUEST = 8 # Seems to be the same on Solaris.
def checksum(source_string):
    """
    I'm not too confident that this is right but testing seems
    to suggest that it gives the same answers as in_cksum in ping.c
    """
    sum = 0
    countTo = (len(source_string)/2)2
    count = 0
    while count<countTo:
        thisVal = ord(source_string[count + 1])256 + ord(source_string[count])
        sum = sum + thisVal
        sum = sum & 0xffffffff # Necessary?
        count = count + 2

if countTo<len(source_string):
    sum = sum + ord(source_string[len(source_string) - 1])
    sum = sum & 0xffffffff # Necessary?

sum = (sum >> 16)  +  (sum & 0xffff)
sum = sum + (sum >> 16)
answer = ~sum
answer = answer & 0xffff

# Swap bytes. Bugger me if I know why.
answer = answer >> 8 | (answer << 8 & 0xff00)

return answer



def receive_one_ping(my_socket, ID, timeout):
    """
    receive the ping from the socket.
    """
    timeLeft = timeout
    while True:
        startedSelect = time.time()
        whatReady = select.select([my_socket], [], [], timeLeft)
        howLongInSelect = (time.time() - startedSelect)
        if whatReady[0] == []: # Timeout
            return

    timeReceived = time.time()
    recPacket, addr = my_socket.recvfrom(1024)
    icmpHeader = recPacket[20:28]
    type, code, checksum, packetID, sequence = struct.unpack(
        "bbHHh", icmpHeader
    )
    if packetID == ID:
        bytesInDouble = struct.calcsize("d")
        timeSent = struct.unpack("d", recPacket[28:28 + bytesInDouble])[0]
        return timeReceived - timeSent

    timeLeft = timeLeft - howLongInSelect
    if timeLeft <= 0:
        return



def send_one_ping(my_socket, dest_addr, ID):
    """
    Send one ping to the given >dest_addr<.
    """
    dest_addr  =  socket.gethostbyname(dest_addr)

# Header is type (8), code (8), checksum (16), id (16), sequence (16)
my_checksum = 0

# Make a dummy heder with a 0 checksum.
header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)  #壓包
#a1 = struct.unpack("bbHHh",header)    #my test
bytesInDouble = struct.calcsize("d")
data = (192 - bytesInDouble) * "Q"
data = struct.pack("d", time.time()) + data

# Calculate the checksum on the data and the dummy header.
my_checksum = checksum(header + data)

# Now that we have the right checksum, we put that in. It's just easier
# to make up a new header than to stuff it into the dummy.
header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1)
packet = header + data
my_socket.sendto(packet, (dest_addr, 1)) # Don't know about the 1



def do_one(dest_addr, timeout):
    """
    Returns either the delay (in seconds) or none on timeout.
    """
    icmp = socket.getprotobyname("icmp")
    try:
        my_socket = socket.socket(socket.AF_INET, socket.SOCK_RAW, icmp)
    except socket.error, (errno, msg):
        if errno == 1:

        # Operation not permitted
        msg = msg + (
            " - Note that ICMP messages can only be sent from processes"
            " running as root."
        )
        raise socket.error(msg)
    raise # raise the original error

my_ID = os.getpid() & 0xFFFF

send_one_ping(my_socket, dest_addr, my_ID)
delay = receive_one_ping(my_socket, my_ID, timeout)

my_socket.close()
return delay



def verbose_ping(dest_addr, timeout = 2, count = 100):
    """
    Send >count< ping to >dest_addr< with the given >timeout< and display
    the result.
    """
    for i in xrange(count):
        print "ping %s..." % dest_addr,
        try:
            delay  =  do_one(dest_addr, timeout)
        except socket.gaierror, e:
            print "failed. (socket error: '%s')" % e[1]
            break

    if delay  ==  None:
        print "failed. (timeout within %ssec.)" % timeout
    else:
        delay  =  delay * 1000
        print "get ping in %0.4fms" % delay


if name == 'main':
    verbose_ping("www.163.com",2,1)</pre>