005_ss-link.info的ping探测工具

用小工具ping.py测试距离您最快的节点

#!/usr/bin/env python
# coding: utf-8

"""
	A pure python ping implementation using raw sockets.

	Note that ICMP messages can only be send from processes running as root
	(in Windows, you must run this script as 'Administrator').

	Bugs are naturally mine. I'd be glad to hear about them. There are
	certainly word - size dependencies here.

	:homepage: https://github.com/socketubs/Pyping/
	:copyleft: 1989-2011 by the python-ping team, see AUTHORS for more details.
	:license: GNU GPL v2, see LICENSE for more details.
"""

import os
import select
import signal
import socket
import struct
import sys
import time

if sys.platform.startswith("win32"):
	# On Windows, the best timer is time.clock()
	default_timer = time.clock
else:
	# On most other platforms the best timer is time.time()
	default_timer = time.time

# ICMP parameters
ICMP_ECHOREPLY = 0 # Echo reply (per RFC792)
ICMP_ECHO = 8 # Echo request (per RFC792)
ICMP_MAX_RECV = 2048 # Max size of incoming buffer

MAX_SLEEP = 1000

def calculate_checksum(source_string):
	"""
	A port of the functionality of in_cksum() from ping.c
	Ideally this would act on the string as a series of 16-bit ints (host
	packed), but this works.
	Network data is big-endian, hosts are typically little-endian
	"""
	countTo = (int(len(source_string) / 2)) * 2
	sum = 0
	count = 0

	# Handle bytes in pairs (decoding as short ints)
	loByte = 0
	hiByte = 0
	while count < countTo:
		if (sys.byteorder == "little"):
			loByte = source_string[count]
			hiByte = source_string[count + 1]
		else:
			loByte = source_string[count + 1]
			hiByte = source_string[count]
		sum = sum + (ord(hiByte) * 256 + ord(loByte))
		count += 2

	# Handle last byte if applicable (odd-number of bytes)
	# Endianness should be irrelevant in this case
	if countTo < len(source_string): # Check for odd length
		loByte = source_string[len(source_string) - 1]
		sum += ord(loByte)

	sum &= 0xffffffff # Truncate sum to 32 bits (a variance from ping.c, which
					  # uses signed ints, but overflow is unlikely in ping)

	sum = (sum >> 16) + (sum & 0xffff)	# Add high 16 bits to low 16 bits
	sum += (sum >> 16)					# Add carry from above (if any)
	answer = ~sum & 0xffff				# Invert and truncate to 16 bits
	answer = socket.htons(answer)

	return answer

def is_valid_ip4_address(addr):
	parts = addr.split(".")
	if not len(parts) == 4:
		return False
	for part in parts:
		try:
			number = int(part)
		except ValueError:
			return False
		if number > 255:
			return False
	return True

def to_ip(addr):
	if is_valid_ip4_address(addr):
		return addr
	return socket.gethostbyname(addr)

class Response(object):
	def __init__(self):
		self.max_rtt = None
		self.min_rtt = None
		self.avg_rtt = None
		self.packet_lost = None
		self.ret_code = None
		self.output = []

		self.packet_size = None
		self.timeout = None
		self.destination = None
		self.destination_ip = None

class Ping(object):
	def __init__(self, destination, timeout=1000, packet_size=55, own_id=None, quiet_output=True, udp=False):
		self.quiet_output = quiet_output
		if quiet_output:
			self.response = Response()
			self.response.destination = destination
			self.response.timeout = timeout
			self.response.packet_size = packet_size

		self.destination = destination
		self.timeout = timeout
		self.packet_size = packet_size
		self.udp = udp

		if own_id is None:
			self.own_id = os.getpid() & 0xFFFF
		else:
			self.own_id = own_id

		try:
			# FIXME: Use destination only for display this line here? see: https://github.com/jedie/python-ping/issues/3
			self.dest_ip = to_ip(self.destination)
			if quiet_output:
				self.response.destination_ip = self.dest_ip
		except socket.gaierror as e:
			self.print_unknown_host(e)
		else:
			self.print_start()

		self.seq_number = 0
		self.send_count = 0
		self.receive_count = 0
		self.min_time = 999999999
		self.max_time = 0.0
		self.total_time = 0.0

	#--------------------------------------------------------------------------

	def print_start(self):
		msg = "\nPYTHON-PING %s (%s): %d data bytes" % (self.destination, self.dest_ip, self.packet_size)
		if self.quiet_output:
			self.response.output.append(msg)
		else:
			print(msg)

	def print_unknown_host(self, e):
		msg = "\nPYTHON-PING: Unknown host: %s (%s)\n" % (self.destination, e.args[1])
		if self.quiet_output:
			self.response.output.append(msg)
			self.response.ret_code = 1
		else:
			print(msg)

		sys.exit(-1)

	def print_success(self, delay, ip, packet_size, ip_header, icmp_header):
		if ip == self.destination:
			from_info = ip
		else:
			from_info = "%s (%s)" % (self.destination, ip)

	   	msg = "%d bytes from %s: icmp_seq=%d ttl=%d time=%.1f ms" % (packet_size, from_info, icmp_header["seq_number"], ip_header["ttl"], delay)

		if self.quiet_output:
			self.response.output.append(msg)
			self.response.ret_code = 0
		else:
			print(msg)
		#print("IP header: %r" % ip_header)
		#print("ICMP header: %r" % icmp_header)

	def print_failed(self):
		msg = "Request timed out."

		if self.quiet_output:
			self.response.output.append(msg)
			self.response.ret_code = 1
		else:
			print(msg)

	def print_exit(self):
		msg = "\n----%s PYTHON PING Statistics----" % (self.destination)

		if self.quiet_output:
			self.response.output.append(msg)
		else:
			print(msg)

		lost_count = self.send_count - self.receive_count
		#print("%i packets lost" % lost_count)
		lost_rate = float(lost_count) / self.send_count * 100.0

		msg = "%d packets transmitted, %d packets received, %0.1f%% packet loss" % (self.send_count, self.receive_count, lost_rate)

		if self.quiet_output:
			self.response.output.append(msg)
			self.response.packet_lost = lost_count
		else:
			print(msg)

		if self.receive_count > 0:
			msg = "round-trip (ms)  min/avg/max = %0.3f/%0.3f/%0.3f" % (self.min_time, self.total_time / self.receive_count, self.max_time)
			if self.quiet_output:
				self.response.min_rtt = '%.3f' % self.min_time
				self.response.avg_rtt = '%.3f' % (self.total_time / self.receive_count)
				self.response.max_rtt = '%.3f' % self.max_time
				self.response.output.append(msg)
			else:
				print(msg)

		if self.quiet_output:
			self.response.output.append('\n')
		else:
			print('')

	#--------------------------------------------------------------------------

	def signal_handler(self, signum, frame):
		"""
		Handle print_exit via signals
		"""
		self.print_exit()
		msg = "\n(Terminated with signal %d)\n" % (signum)

		if self.quiet_output:
			self.response.output.append(msg)
			self.response.ret_code = 0
		else:
			print(msg)

		sys.exit(0)

	def setup_signal_handler(self):
		signal.signal(signal.SIGINT, self.signal_handler)   # Handle Ctrl-C
		if hasattr(signal, "SIGBREAK"):
			# Handle Ctrl-Break e.g. under Windows
			signal.signal(signal.SIGBREAK, self.signal_handler)

	#--------------------------------------------------------------------------

	def header2dict(self, names, struct_format, data):
		""" unpack the raw received IP and ICMP header informations to a dict """
		unpacked_data = struct.unpack(struct_format, data)
		return dict(zip(names, unpacked_data))

	#--------------------------------------------------------------------------

	def run(self, count=None, deadline=None):
		"""
		send and receive pings in a loop. Stop if count or until deadline.
		"""
		if not self.quiet_output:
			self.setup_signal_handler()

		while True:
			delay = self.do()

			self.seq_number += 1
			if count and self.seq_number >= count:
				break
			if deadline and self.total_time >= deadline:
				break

			if delay == None:
				delay = 0

			# Pause for the remainder of the MAX_SLEEP period (if applicable)
			if (MAX_SLEEP > delay):
				time.sleep((MAX_SLEEP - delay) / 1000.0)

		self.print_exit()
		if self.quiet_output:
			return self.response

	def do(self):
		"""
		Send one ICMP ECHO_REQUEST and receive the response until self.timeout
		"""
		try: # One could use UDP here, but it's obscure
			if self.udp:
				current_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.getprotobyname("udp"))
			else:
				current_socket = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.getprotobyname("icmp"))
		except socket.error, (errno, msg):
			if errno == 1:
				# Operation not permitted - Add more information to traceback
				etype, evalue, etb = sys.exc_info()
				evalue = etype(
					"%s - Note that ICMP messages can only be send from processes running as root." % evalue
				)
				raise etype, evalue, etb
			raise # raise the original error

		send_time = self.send_one_ping(current_socket)
		if send_time == None:
			return
		self.send_count += 1

		receive_time, packet_size, ip, ip_header, icmp_header = self.receive_one_ping(current_socket)
		current_socket.close()

		if receive_time:
			self.receive_count += 1
			delay = (receive_time - send_time) * 1000.0
			self.total_time += delay
			if self.min_time > delay:
				self.min_time = delay
			if self.max_time < delay:
				self.max_time = delay

			self.print_success(delay, ip, packet_size, ip_header, icmp_header)
			return delay
		else:
			self.print_failed()

	def send_one_ping(self, current_socket):
		"""
		Send one ICMP ECHO_REQUEST
		"""
		# Header is type (8), code (8), checksum (16), id (16), sequence (16)
		checksum = 0

		# Make a dummy header with a 0 checksum.
		header = struct.pack(
			"!BBHHH", ICMP_ECHO, 0, checksum, self.own_id, self.seq_number
		)

		padBytes = []
		startVal = 0x42
		for i in range(startVal, startVal + (self.packet_size)):
			padBytes += [(i & 0xff)]  # Keep chars in the 0-255 range
		data = bytes(padBytes)

		# Calculate the checksum on the data and the dummy header.
		checksum = calculate_checksum(header + data) # Checksum is in network order

		# 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, 0, checksum, self.own_id, self.seq_number
		)

		packet = header + data

		send_time = default_timer()

		try:
			current_socket.sendto(packet, (self.destination, 1)) # Port number is irrelevant for ICMP
		except socket.error as e:
			self.response.output.append("General failure (%s)" % (e.args[1]))
			current_socket.close()
			return

		return send_time

	def receive_one_ping(self, current_socket):
		"""
		Receive the ping from the socket. timeout = in ms
		"""
		timeout = self.timeout / 1000.0

		while True: # Loop while waiting for packet or timeout
			select_start = default_timer()
			inputready, outputready, exceptready = select.select([current_socket], [], [], timeout)
			select_duration = (default_timer() - select_start)
			if inputready == []: # timeout
				return None, 0, 0, 0, 0

			receive_time = default_timer()

			packet_data, address = current_socket.recvfrom(ICMP_MAX_RECV)

			icmp_header = self.header2dict(
				names=[
					"type", "code", "checksum",
					"packet_id", "seq_number"
				],
				struct_format="!BBHHH",
				data=packet_data[20:28]
			)

			if icmp_header["packet_id"] == self.own_id: # Our packet
				ip_header = self.header2dict(
					names=[
						"version", "type", "length",
						"id", "flags", "ttl", "protocol",
						"checksum", "src_ip", "dest_ip"
					],
					struct_format="!BBHHHBBHII",
					data=packet_data[:20]
				)
				packet_size = len(packet_data) - 28
				ip = socket.inet_ntoa(struct.pack("!I", ip_header["src_ip"]))
				# XXX: Why not ip = address[0] ???
				return receive_time, packet_size, ip, ip_header, icmp_header

			timeout = timeout - select_duration
			if timeout <= 0:
				return None, 0, 0, 0, 0

def ping(hostname, timeout=1000, count=3, packet_size=55, udp=False,*args, **kwargs):
	p = Ping(hostname, timeout, packet_size, *args, **kwargs)
	return p.run(count)

def allIP():
	#return ["8.8.8.8","a8.8.4.4"]
	r=[]
	try:
		import urllib2
		hdr = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11',
				'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
				'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.3',
				'Accept-Encoding': 'none',
				'Accept-Language': 'en-US,en;q=0.8',
				'Connection': 'keep-alive'}
		req=urllib2.Request("https://www.ss-link.info/all",headers=hdr)

		s=urllib2.urlopen(req).read()
		r=s.split()
	except Exception,e:
		print "Network Error",e
	return r

totalCount=5
def mycompare(x,y):
	x1 = float(x.avg_rtt)+x.packet_lost*1000.0/totalCount
	y1 = float(y.avg_rtt)+y.packet_lost*1000.0/totalCount
	return int( 1000*(x1-y1) )
if __name__ == "__main__":
	ips=allIP()
	print "Start ..."
	results=[]
	for ip in ips:
		r=None
		try:
			r=ping(ip,count=totalCount)
		except Exception,e:
			print e
		if r:
			print r.destination_ip,"..."
			if r.avg_rtt == None: r.avg_rtt = 2000
			results.append(r)
	print ""
	print "The most fast IP:"
	results = sorted( results, cmp=mycompare )
	for r in results:
		print r.destination_ip,"AVG",r.avg_rtt,"LOST",r.packet_lost*1.0/totalCount

　　

小工具ping.py是用Python语言开发的，可以运行在Windows, Linux, Mac OS等平台。下载请点击这里。ping.py自动从www.ss-link.com网站获取所有可用的节点，然后对每个节点发送5个ICMP ping，按平均响应时间和丢包率排序，给出结果。ping.py需要管理员权限运行，因为发送ICMP是需要管理员权限的。

在Linux和Mac OS下使用这个工具的方法是运行命令：sudo python ping.py

在Windows下需要先下载安装Python 2.7，下载Python请点击这里，64位的Windows选择Windows x86-64 MSI installer，32位的选择Windows x86 MSI installer。安装Python建议默认安装即可，默认是安装在C:\Python27 目录下。小工具ping.py建议也放到C:\Python27 目录下。按照下面的步骤运行。

用管理员模式运行cmd。在Windows的菜单的搜索框中输入cmd，会搜索出“命令提示符”，旁边是一个黑色小窗口的图标，类似。在这个小图标上点击鼠标右键，选择“以管理员身份运行”，如图

然后出现cmd黑色窗口，请注意窗口的左上角应该有“管理员”字样，这样表示是用的管理员身份运行的。在这个窗口执行如下两个命令“cd C:\Python27” 和“python ping.py”，注意不要带双引号，如果ping.py保存到了别的地方比如D:\tools 那么需要修改第二个命令为“python D:\tools\ping.py”

这个命令需要几分钟才能运行完成，完成后输出的“The most fast IP:”后面的部分，越靠前的IP速度越快。