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+#!/usr/bin/python2
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+
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+# (c) 2016 by Siegrist(SystemLoesungen) <PSS @ ZweierNet.ch>
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+# Website: [https://wiki.zweiernet.ch/wiki/Sinetstat]
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+#
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+# This program is free software.
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+#
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+# The program is based on a python netstat script that was written by da667 available on https://github.com/da667/netstat
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+# who had it adapted from Ricardo Pascal, available on http://voorloopnul.com/blog/a-python-netstat-in-less-than-100-lines-of-code.
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+#
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+# This version has some improvements make it an acceptable alternative to the original netstat command.
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+# So it can explore IPv4 in IPv6 listening sockets and some other information over and above the original netstat.
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+#
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+# Simply try: 'sinetstat -h'
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+#
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+
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+
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+import pwd
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+import os
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+import re
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+import glob
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+import socket
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+import sys
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+import string
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+import fcntl
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+import struct
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+import argparse
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+
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+
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+
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+VERSION = '1.0'
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+
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+PROC_TCP4 = "/proc/net/tcp"
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+PROC_UDP4 = "/proc/net/udp"
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+PROC_TCP6 = "/proc/net/tcp6"
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+PROC_UDP6 = "/proc/net/udp6"
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+PROC_PACKET = "/proc/net/packet"
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+
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+MAX_IPV4_ADDRESS = 0xffffffff
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+MAX_IPV6_ADDRESS = 0xffffffffffffffffffffffffffffffff
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+TCP_STATE = {
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+ '01':'ESTABLISHED',
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+ '02':'SYN_SENT',
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+ '03':'SYN_RECV',
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+ '04':'FIN_WAIT1',
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+ '05':'FIN_WAIT2',
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+ '06':'TIME_WAIT',
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+ '07':'CLOSE',
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+ '08':'CLOSE_WAIT',
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+ '09':'LAST_ACK',
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+ '0A':'LISTEN',
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+ '0B':'CLOSING'
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+ }
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+#MYIPV4 = os.popen('ip addr show eth0 | grep "\<inet\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
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+#MYIPV6 = os.popen('ip addr show eth0 | grep "\<inet\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
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+#MYIFS = os.popen("ifconfig | grep '^[a-z0-9]' | awk '{print $1}'").read().strip()
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+
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+v4ports = []
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+opt_l = True
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+
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+def xx():
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+ for a in MYIFS.split():
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+ print 'IFF:', a
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+ print 'v6:', os.popen('ip addr show ' + a + ' | grep "\<inet6\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
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+
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+def grep_b(list, search):
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+ return [True for i in list if search in i]
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+
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+def get_ip_address(ifname):
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+ s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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+ return socket.inet_ntoa(fcntl.ioctl(
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+ s.fileno(),
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+ 0x8915, # SIOCGIFADDR
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+ struct.pack('256s', ifname[:15])
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+ )[20:24])
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+
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+def _tcp4load():
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+ ''' Read the table of tcp connections & remove the header '''
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+ with open(PROC_TCP4,'r') as f:
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+ content = f.readlines()
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+ content.pop(0)
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+ return content
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+
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+def _tcp6load():
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+ ''' Read the table of tcpv6 connections & remove the header'''
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+ with open(PROC_TCP6,'r') as f:
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+ content = f.readlines()
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+ content.pop(0)
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+ return content
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+
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+def _udp4load():
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+ '''Read the table of udp connections & remove the header '''
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+ with open(PROC_UDP4,'r') as f:
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+ content = f.readlines()
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+ content.pop(0)
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+ return content
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+
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+def _udp6load():
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+ '''Read the table of udp connections & remove the header '''
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+ with open(PROC_UDP6,'r') as f:
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+ content = f.readlines()
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+ content.pop(0)
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+ return content
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+
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+def _hex2dec(s):
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+ return str(int(s,16))
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+
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+def _ip(s):
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+ ip = [(_hex2dec(s[6:8])),(_hex2dec(s[4:6])),(_hex2dec(s[2:4])),(_hex2dec(s[0:2]))]
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+ return '.'.join(ip)
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+
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+def _ip6(s):
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+ ip = [s[6:8],s[4:6],s[2:4],s[0:2],s[12:14],s[14:16],s[10:12],s[8:10],s[22:24],s[20:22],s[18:20],s[16:18],s[30:32],s[28:30],s[26:28],s[24:26]]
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+ #print '66666:', ':'.join(ip), s
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+ return ':'.join(ip)
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+
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+def _ip6q(s):
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+ ip = [s[6:8]+s[4:6],s[2:4]+s[0:2],s[12:14]+s[14:16],s[10:12]+s[8:10],s[22:24]+s[20:22],s[18:20]+s[16:18],s[30:32]+s[28:30],s[26:28]+s[24:26]]
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+ #print '666qqq:', ':'.join(ip), s
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+ return ':'.join(ip)
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+
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+def _conv_v6(s):
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+ return s
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+
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+
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+
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+def _remove_empty(array):
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+ return [x for x in array if x !='']
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+
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+def _convert_ipv4_port(array):
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+ host,port = array.split(':')
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+ return _ip(host),_hex2dec(port)
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+
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+def _convert_ipv6_port(array):
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+ host,port = array.split(':')
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+ return _ip6(host),_hex2dec(port)
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+
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+def _convert_ipv6(array):
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+ host,port = array.split(':')
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+ return _ip6q(host)
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+
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+def _addr_normal(s):
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+ return ':'.join(["%x" % x for x in [int(x, 16) for x in s.split(':')]])
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+
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+def _countFollowingZeros(l):
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+ """Return number of elements containing 0 at the beginning of the list."""
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+ #print 'aaa:', l
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+ if len(l) == 0:
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+ return 0
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+ elif l[0] != 0:
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+ return 0
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+ else:
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+ return 1 + _countFollowingZeros(l[1:])
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+
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+def _compress_v6(addr):
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+ hextets = [int(x, 16) for x in addr.split(':')]
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+ #print hextets
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+ followingzeros = [0] * 8
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+ for i in xrange(len(hextets)):
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+ followingzeros[i] = _countFollowingZeros(hextets[i:])
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+ # compressionpos is the position where we can start removing zeros
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+ compressionpos = followingzeros.index(max(followingzeros))
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+ if max(followingzeros) > 1:
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+ # genererate string with the longest number of zeros cut out
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+ # now we need hextets as strings
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+ hextets = [x for x in _addr_normal(addr).split(':')]
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+ while compressionpos < len(hextets) and hextets[compressionpos] == '0':
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+ del(hextets[compressionpos])
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+ hextets.insert(compressionpos, '')
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+ if compressionpos + 1 >= len(hextets):
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+ hextets.append('')
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+ if compressionpos == 0:
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+ hextets = [''] + hextets
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+ return ':'.join(hextets)
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+ else:
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+ return _addr_normal(addr)
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+
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+
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+def _resolve_ip(host):
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+ """
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+ resolve ip und update dictionary res_cache {'ip': 'name'}.
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+ If resolution for a ip failed, 'name' is n_try ... 0.
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+ """
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+ try:
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+ hname = socket.gethostbyaddr(host)[0]
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+ return str(hname)
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+ except:
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+ return str(host)
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+
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+
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+
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+
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+def netstat_tcp4():
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+ '''
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+ Function to return a list with status of tcp4 connections on Linux systems.
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+ '''
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+
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+ tcpcontent =_tcp4load()
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+ tcpresult = []
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+ for line in tcpcontent:
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+ line_array = _remove_empty(line.split(' ')) # Split lines and remove empty spaces.
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+ l_host,l_port = _convert_ipv4_port(line_array[1]) # Convert ipaddress and port from hex to decimal.
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+ r_host,r_port = _convert_ipv4_port(line_array[2])
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+ tcp_id = line_array[0]
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+ state = TCP_STATE[line_array[3]]
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+ if state != 'LISTEN' and o_listen == True:
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+ continue
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+ if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
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+ continue
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+
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+ try:
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+ uid = pwd.getpwuid(int(line_array[7]))[0] # Get user from UID.
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+ except:
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+ uid = line_array[7]
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+ inode = line_array[9] # Need the inode to get process pid.
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+ if int(inode) > 0:
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+ pid = _get_pid_of_inode(inode)
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+ try: # try read the process name.
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+ if o_wide == True:
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+ with open('/proc/'+pid+'/cmdline','r') as f:
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+ exe = ' '.join(f.read().split('\x00')).split(' ')[0]
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+ elif o_wider == True:
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+ with open('/proc/'+pid+'/cmdline','r') as f:
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+ exe = ' '.join(f.read().split('\x00'))
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+ else:
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+ exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
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+ except:
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+ exe = '-'
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+ else:
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+ pid = '-'
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+ exe = '-'
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+
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+ if o_numeric == False:
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+ r_host = _resolve_ip(r_host)
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+
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+ nline = '%-7s %-24s %-24s %-11s %-8s %-6s %-s' % ('TCP4', l_host+': '+l_port, r_host+': '+r_port, state, uid, pid, exe)
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+
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+ tcpresult.append(nline)
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+
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+ # update v4inv6check list
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+ v4ports.append(l_port)
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+
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+ return tcpresult
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+
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+def netstat_tcp6():
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+ '''
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+ This function returns a list of tcp connections utilizing ipv6.
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+ '''
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+ tcpcontent = _tcp6load()
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+ tcpresult = []
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+ for line in tcpcontent:
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+ line_array = _remove_empty(line.split(' '))
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+ l_host,l_port = _convert_ipv6_port(line_array[1])
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+ r_host,r_port = _convert_ipv6_port(line_array[2])
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+ tcp_id = line_array[0]
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+ state = TCP_STATE[line_array[3]]
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+ if state != 'LISTEN' and o_listen == True:
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+ continue
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+ if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
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+ continue
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+
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+ try:
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+ uid = pwd.getpwuid(int(line_array[7]))[0] # Get user from UID.
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+ except:
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+ uid = line_array[7]
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+ inode = line_array[9]
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+ if int(inode) > 0:
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+ pid = _get_pid_of_inode(inode)
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+ try: # try read the process name.
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+ if o_wide == True:
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+ with open('/proc/'+pid+'/cmdline','r') as f:
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+ exe = ' '.join(f.read().split('\x00')).split(' ')[0]
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+ elif o_wider == True:
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+ with open('/proc/'+pid+'/cmdline','r') as f:
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+ exe = ' '.join(f.read().split('\x00'))
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+ else:
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+ exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
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+ except:
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+ exe = '-'
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+ else:
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+ pid = '-'
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+ exe = '-'
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+
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+ nline = '%-7s %-24s %-24s %-11s %-8s %-6s %-s' % ('TCP6', _compress_v6(_convert_ipv6(line_array[1]))+': '+l_port, _compress_v6(_convert_ipv6(line_array[2]))+': '+r_port, state, uid, pid, exe)
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+
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+ tcpresult.append(nline)
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+
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+ return tcpresult
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+
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+
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+def netstat_tcp4in6():
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+ '''
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+ Returns a list of tcp ipv4 in ipv6 listen sockets.
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+ '''
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+ #print xx()
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+
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+ tcpcontent = _tcp6load()
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+ tcpresult = []
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+ for line in tcpcontent:
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+ line_array = _remove_empty(line.split(' '))
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+ #if TCP_STATE[line_array[3]] != 'LISTEN':
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+ # continue
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+
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+ l_host,l_port = _convert_ipv6_port(line_array[1])
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+ r_host,r_port = _convert_ipv6_port(line_array[2])
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+ if grep_b(v4ports,l_port):
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+ continue
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+ tcp_id = line_array[0]
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+ state = TCP_STATE[line_array[3]]
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+ if state != 'LISTEN' and o_listen == True:
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+ continue
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+ if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
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+ continue
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+
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+ try:
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+ uid = pwd.getpwuid(int(line_array[7]))[0] # Get user from UID.
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+ except:
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+ uid = line_array[7]
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+ inode = line_array[9]
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+ if int(inode) > 0:
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+ pid = _get_pid_of_inode(inode)
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+ try: # try read the process name.
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+ if o_wide == True:
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+ with open('/proc/'+pid+'/cmdline','r') as f:
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+ exe = ' '.join(f.read().split('\x00')).split(' ')[0]
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+ elif o_wider == True:
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+ with open('/proc/'+pid+'/cmdline','r') as f:
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+ exe = ' '.join(f.read().split('\x00'))
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+ else:
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+ exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
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+ except:
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+ exe = '-'
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+ else:
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+ pid = '-'
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+ exe = '-'
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+
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+ if l_host == '00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:01':
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+ if _check_v4inv6_port("127.0.0.1",l_port):
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+ nline = '%-7s %-24s %-24s %-11s %-8s %-6s %-s' % ('TCP4in6', '127.0.0.1: '+l_port, _compress_v6(_convert_ipv6(line_array[2]))+': '+r_port, state, uid, pid, exe)
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+ tcpresult.append(nline)
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+ if l_host == "00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00":
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+ if _check_v4inv6_port("0.0.0.0",l_port):
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+ nline = '%-7s %-24s %-24s %-11s %-8s %-6s %-s' % ('TCP4in6', '0.0.0.0: '+l_port, _compress_v6(_convert_ipv6(line_array[2]))+': '+r_port, state, uid, pid, exe)
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+ tcpresult.append(nline)
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+ #else:
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+ # for a in MYIFS.split():
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+ # _check_v4inv6_port(get_ip_address(a),l_port)
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+
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+ return tcpresult
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+
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+
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+def netstat_udp4():
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+ '''
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+ Function to return a list with status of udp connections.
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+ '''
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+
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+ udpcontent =_udp4load()
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+ udpresult = []
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+ for line in udpcontent:
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+ line_array = _remove_empty(line.split(' '))
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+ l_host,l_port = _convert_ipv4_port(line_array[1])
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+ r_host,r_port = _convert_ipv4_port(line_array[2])
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+ udp_id = line_array[0]
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+ udp_state = TCP_STATE[line_array[3]]
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+ if ( udp_state != 'ESTABLISHED' and o_estab == True ) or o_estab == False:
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+ continue
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+ if udp_state != 'ESTABLISHED':
|
|
|
+ udp_state =' ' #UDP is stateless
|
|
|
+ try:
|
|
|
+ uid = pwd.getpwuid(int(line_array[7]))[0] # Get user from UID.
|
|
|
+ except:
|
|
|
+ uid = line_array[7]
|
|
|
+ inode = line_array[9]
|
|
|
+ if int(inode) > 0:
|
|
|
+ pid = _get_pid_of_inode(inode)
|
|
|
+ try: # try read the process name.
|
|
|
+ if o_wide == True:
|
|
|
+ with open('/proc/'+pid+'/cmdline','r') as f:
|
|
|
+ exe = ' '.join(f.read().split('\x00')).split(' ')[0]
|
|
|
+ elif o_wider == True:
|
|
|
+ with open('/proc/'+pid+'/cmdline','r') as f:
|
|
|
+ exe = ' '.join(f.read().split('\x00'))
|
|
|
+ else:
|
|
|
+ exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
|
|
|
+ except:
|
|
|
+ exe = '-'
|
|
|
+ else:
|
|
|
+ pid = '-'
|
|
|
+ exe = '-'
|
|
|
+
|
|
|
+ nline = '%-7s %-24s %-24s %-11s %-8s %-6s %-s' % ('UDP4', l_host+': '+l_port, r_host+': '+r_port, udp_state, uid, pid, exe)
|
|
|
+
|
|
|
+ udpresult.append(nline)
|
|
|
+ return udpresult
|
|
|
+
|
|
|
+def netstat_udp6():
|
|
|
+ '''
|
|
|
+ Function to return a list of udp connection utilizing ipv6
|
|
|
+ '''
|
|
|
+
|
|
|
+ udpcontent =_udp6load()
|
|
|
+ udpresult = []
|
|
|
+ for line in udpcontent:
|
|
|
+ line_array = _remove_empty(line.split(' '))
|
|
|
+ l_host,l_port = _convert_ipv6_port(line_array[1])
|
|
|
+ r_host,r_port = _convert_ipv6_port(line_array[2])
|
|
|
+ udp_id = line_array[0]
|
|
|
+ udp_state = TCP_STATE[line_array[3]]
|
|
|
+ if ( udp_state != 'ESTABLISHED' and o_estab == True ) or o_estab == False:
|
|
|
+ continue
|
|
|
+ if udp_state != 'ESTABLISHED':
|
|
|
+ udp_state =' ' #UDP is stateless
|
|
|
+ try:
|
|
|
+ uid = pwd.getpwuid(int(line_array[7]))[0] # Get user from UID.
|
|
|
+ except:
|
|
|
+ uid = line_array[7]
|
|
|
+ inode = line_array[9]
|
|
|
+ if int(inode) > 0:
|
|
|
+ pid = _get_pid_of_inode(inode)
|
|
|
+ try: # try read the process name.
|
|
|
+ if o_wide == True:
|
|
|
+ with open('/proc/'+pid+'/cmdline','r') as f:
|
|
|
+ exe = ' '.join(f.read().split('\x00')).split(' ')[0]
|
|
|
+ elif o_wider == True:
|
|
|
+ with open('/proc/'+pid+'/cmdline','r') as f:
|
|
|
+ exe = ' '.join(f.read().split('\x00'))
|
|
|
+ else:
|
|
|
+ exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
|
|
|
+ except:
|
|
|
+ exe = '-'
|
|
|
+ else:
|
|
|
+ pid = '-'
|
|
|
+ exe = '-'
|
|
|
+
|
|
|
+ nline = '%-7s %-24s %-24s %-11s %-8s %-6s %-s' % ('UDP6', _compress_v6(_convert_ipv6(line_array[1]))+': '+l_port, _compress_v6(_convert_ipv6(line_array[2]))+': '+r_port, udp_state, uid, pid, exe)
|
|
|
+
|
|
|
+ udpresult.append(nline)
|
|
|
+ return udpresult
|
|
|
+
|
|
|
+
|
|
|
+def _get_pid_of_inode(inode):
|
|
|
+ '''
|
|
|
+ To retrieve the process pid, check every running process and look for one using
|
|
|
+ the given inode.
|
|
|
+ '''
|
|
|
+ for item in glob.glob('/proc/[0-9]*/fd/[0-9]*'):
|
|
|
+ try:
|
|
|
+ if re.search(inode,os.readlink(item)):
|
|
|
+ return item.split('/')[2]
|
|
|
+ except:
|
|
|
+ pass
|
|
|
+ return None
|
|
|
+
|
|
|
+def check_root():
|
|
|
+ if os.getuid() == 0:
|
|
|
+ return True
|
|
|
+ else:
|
|
|
+ return False
|
|
|
+
|
|
|
+def _check_v4inv6_port(addr,portnr):
|
|
|
+ '''
|
|
|
+ check if a v4 port is listening over ip6. Strange, we do a SYN connect for every port not listening v4.
|
|
|
+ thats because I think there is no image in the /proc filesystem
|
|
|
+ '''
|
|
|
+ #print 'aaacc:', addr, portnr
|
|
|
+ is_onnected = False
|
|
|
+ try:
|
|
|
+ try:
|
|
|
+ t_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
|
|
+ except:
|
|
|
+ print("Error: Can't open socket!\n")
|
|
|
+ return False
|
|
|
+ t_socket.connect((addr, int(portnr)))
|
|
|
+ is_onnected = True
|
|
|
+ except:
|
|
|
+ is_onnected = False
|
|
|
+ finally:
|
|
|
+ if(is_onnected and portnr != t_socket.getsockname()[1]):
|
|
|
+ #print("{}:{} Open \n".format(addr, portnr))
|
|
|
+ t_socket.close()
|
|
|
+ return True
|
|
|
+ t_socket.close()
|
|
|
+ return False
|
|
|
+
|
|
|
+
|
|
|
+if __name__ == '__main__':
|
|
|
+ if not check_root():
|
|
|
+ print("This program needs root privileges !\nThats because of reading the /proc filesystem and using functions like getpwuid().\nSo I give up\n")
|
|
|
+ sys.exit()
|
|
|
+
|
|
|
+
|
|
|
+ #print
|
|
|
+ # commandline params
|
|
|
+ o_numeric = True
|
|
|
+ o_listen = False
|
|
|
+ o_estab = None
|
|
|
+ o_wide = False
|
|
|
+ o_wider = False
|
|
|
+ o_udp = True
|
|
|
+ o_tcp = True
|
|
|
+ o_v6 = True
|
|
|
+ o_v4 = True
|
|
|
+ parser = argparse.ArgumentParser(description='netstat utility V'+VERSION+"\n2017 by sigi <https://wiki.zweiernet.ch/wiki/Informatik>",
|
|
|
+ formatter_class=argparse.RawDescriptionHelpFormatter )
|
|
|
+ parser.add_argument('-l', help="Only listening sockets", action="store_true")
|
|
|
+ parser.add_argument('-e', help="Only established sockets", action="store_true")
|
|
|
+ parser.add_argument('-r', help="Resolve IP-Addresses", action="store_true")
|
|
|
+ parser.add_argument('-w', help="Wide (show cmd)", action="store_true")
|
|
|
+ parser.add_argument('-W', help="Wider (show cmd with arguments)", action="store_true")
|
|
|
+ parser.add_argument('-t', help="Only TCP", action="store_true")
|
|
|
+ parser.add_argument('-u', help="Only UDP", action="store_true")
|
|
|
+ parser.add_argument('-4', dest='v4', help="Only IPv4", action="store_true")
|
|
|
+ parser.add_argument('-6', dest='v6', help="Only IPv6", action="store_true")
|
|
|
+ args = parser.parse_args()
|
|
|
+ if args.r:
|
|
|
+ o_numeric = False
|
|
|
+ if args.l:
|
|
|
+ o_listen = True
|
|
|
+ if args.e:
|
|
|
+ o_estab = True
|
|
|
+ o_listen = False
|
|
|
+ if args.w:
|
|
|
+ o_wide = True
|
|
|
+ if args.W:
|
|
|
+ o_wider = True
|
|
|
+ o_wide = False
|
|
|
+ if args.t:
|
|
|
+ o_udp = False
|
|
|
+ if args.u:
|
|
|
+ o_tcp = False
|
|
|
+ if args.v4:
|
|
|
+ o_v6 = False
|
|
|
+ if args.v6:
|
|
|
+ o_v4 = False
|
|
|
+
|
|
|
+
|
|
|
+ # Output
|
|
|
+ print '%-7s %-24s %-24s %-11s %-8s %-6s %-s' % ('Proto', 'Local Address', 'Remote Address', 'State', 'UID', 'PID', 'Program')
|
|
|
+ print '%-7s %-24s %-24s %-11s %-8s %-6s %-s' % ('-----', '-------------', '--------------', '-----', '---', '---', '-------')
|
|
|
+ #print "\nTCP (v4) Results:\n"
|
|
|
+ if o_v4 == True and o_tcp == True:
|
|
|
+ for conn_tcp in netstat_tcp4():
|
|
|
+ print conn_tcp
|
|
|
+ #print "\nTCP (v4inv6) Results:\n"
|
|
|
+ if o_v4 == True and o_tcp == True:
|
|
|
+ for conn_tcp46 in netstat_tcp4in6():
|
|
|
+ print conn_tcp46
|
|
|
+ #print "\nTCP (v6) Results:\n"
|
|
|
+ if o_v6 == True and o_tcp == True:
|
|
|
+ for conn_tcp6 in netstat_tcp6():
|
|
|
+ print conn_tcp6
|
|
|
+ #print "\nUDP (v4) Results:\n"
|
|
|
+ if o_v4 == True and o_udp == True and not args.l:
|
|
|
+ for conn_udp in netstat_udp4():
|
|
|
+ print conn_udp
|
|
|
+ #print "\nUDP (v6) Results:\n"
|
|
|
+ if o_v6 == True and o_udp == True and not args.l:
|
|
|
+ for conn_udp6 in netstat_udp6():
|
|
|
+ print conn_udp6
|
|
|
+
|