python判断ip能否ping通_使用Python测试Ping主机IP和某端口是否开放的实例

使用Python方法

比用各种命令方便，可以设置超时时间，到底通不通，端口是否开放一眼能看出来。

命令和返回

完整权限，可以ping通，端口开放，结果如下：

无root权限(省略了ping)，端口开放，结果如下：

完整权限，可以ping通，远端端口关闭，结果如下：

完整权限，可以ping通，本地端口关闭，结果如下：

完整权限，不能ping通(端口自然也无法访问)，结果如下：

pnp.py代码

#!/usr/bin/python

#name pnp.py

#ping and port

#coding:utf-8

import os, sys, socket, struct, select, time

ICMP_ECHO_REQUEST = 8 # Seems to be the same on Solaris.

socket.setdefaulttimeout(4)

#first argument

host=sys.argv[1]

#second argument

port=int(sys.argv[2])

#socket try connect

def PortOpen(ip,port):

print( " 33[1m*Port 33[0m %s:%d" %(ip,port)),

s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)

try:

s.connect((ip,port))

s.shutdown(2)

print( " 33[1;32m.... is OK. 33[0m" )

return True

except socket.timeout:

print( " 33[1;33m.... is down or network time out!!! 33[0m" )

return False

except:

print( " 33[1;31m.... is down!!! 33[0m" )

return False

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

thisVal = ord(source_string[count + 1])*256 + ord(source_string[count])

sum = sum + thisVal

sum = sum & 0xffffffff # Necessary?

count = count + 2

if countTo

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)

#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.

"""

delay=None

icmp = socket.getprotobyname("icmp")

try:

my_socket = socket.socket(socket.AF_INET, socket.SOCK_RAW, icmp)

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()

except socket.error, (errno, msg):

if errno == 1:

# Operation not permitted

msg = msg + (

" - not root."

)

raise socket.error(msg)

#raise # raise the original error

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 " 33[1m*Ping 33[0m %s ..." % dest_addr,

try:

delay = do_one(dest_addr, timeout)

except socket.error, e:

print " 33[1;31m... failed. (%s)" % e

break

if delay == None:

print " 33[1;31m... failed. (timeout within %ssec.) 33[0m" % timeout

else:

delay = delay * 1000

print " 33[1;32m... get ping in %0.4fms 33[0m" % delay

if __name__ == "__main__":

if os.geteuid() == 0:

verbose_ping(host,2,3)

else:

print " 33[1m*Ping 33[0m test must be sudo or root..."

PortOpen(host,port)

print( "Job finished.")

使用命令方法

使用命令ping就不说了，端口可以用下面的命令。

当时目前telnet基本不用，可能没有telnet客户端了。

测试通常连接不上会等很久，端口连上了也需要通过反馈内容自行判断。

telnet

telnet ip port

$telnet 192.168.234.1

Trying 192.168.234.1...

Connected to 192.168.234.1.

Escape character is "^]".

......

wget

wget ip:port

$wget 192.168.234.1:21

--2019-03-22 15:42:27-- http://192.168.234.1:21/

正在连接 192.168.234.1:21... 已连接。

已发出 HTTP 请求，正在等待回应... 200 没有 HTTP 头，尝试 HTTP/0.9

长度：未指定

正在保存至: “index.html”

......

SSH

ssh -v ip -p port

$ssh -v 192.168.234.1 -p 21

OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017

debug1: Reading configuration data /etc/ssh/ssh_config

debug1: /etc/ssh/ssh_config line 58: Applying options for *

debug1: Connecting to 192.168.234.1 [192.168.234.1] port 21.

debug1: Connection established.

......

curl

culr ip:port

$curl 192.168.234.1:21

220 Serv-U FTP Server v15.1 ready...

530 Not logged in.

......

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