initial commit

si_netstat.py_SAV_08062017

@@ -1,560 +0,0 @@
-#!/usr/bin/python2
-
-# (c) 2016 by Siegrist(SystemLoesungen) <PSS @ ZweierNet.ch> 
-# Website: [https://wiki.zweiernet.ch/wiki/Sinetstat]
-# 
-# This program is free software. 
-#
-# The program is based on a python netstat script that was written by da667 available on https://github.com/da667/netstat
-# who had it adapted from Ricardo Pascal, available on http://voorloopnul.com/blog/a-python-netstat-in-less-than-100-lines-of-code.
-#
-# This version has some improvements make it an acceptable alternative to the original netstat command.
-# So it can explore IPv4 in IPv6 listening sockets and some other information over and above the original netstat.
-#
-# Simply try: 'sinetstat -h'
-#
-
-
-import pwd
-import os
-import re
-import glob
-import socket
-import sys
-import string
-import fcntl
-import struct
-import argparse
-
-
-
-VERSION = '1.0'
-
-PROC_TCP4 = "/proc/net/tcp"
-PROC_UDP4 = "/proc/net/udp"
-PROC_TCP6 = "/proc/net/tcp6"
-PROC_UDP6 = "/proc/net/udp6"
-PROC_PACKET = "/proc/net/packet"
-
-MAX_IPV4_ADDRESS = 0xffffffff
-MAX_IPV6_ADDRESS = 0xffffffffffffffffffffffffffffffff
-TCP_STATE = {
-        '01':'ESTABLISHED',
-        '02':'SYN_SENT',
-        '03':'SYN_RECV',
-        '04':'FIN_WAIT1',
-        '05':'FIN_WAIT2',
-        '06':'TIME_WAIT',
-        '07':'CLOSE',
-        '08':'CLOSE_WAIT',
-        '09':'LAST_ACK',
-        '0A':'LISTEN',
-        '0B':'CLOSING'
-        }
-#MYIPV4 = os.popen('ip addr show eth0 | grep "\<inet\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
-#MYIPV6 = os.popen('ip addr show eth0 | grep "\<inet\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
-#MYIFS = os.popen("ifconfig | grep '^[a-z0-9]' | awk '{print $1}'").read().strip()
-
-v4ports = []
-opt_l = True
-
-def xx():
-    for a in MYIFS.split():
-        print 'IFF:', a
-        print 'v6:', os.popen('ip addr show ' + a + ' | grep "\<inet6\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
-
-def grep_b(list, search):
-    return [True for i in list if search in i]
-    
-def get_ip_address(ifname):
-    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-    return socket.inet_ntoa(fcntl.ioctl(
-        s.fileno(),
-        0x8915,  # SIOCGIFADDR
-        struct.pack('256s', ifname[:15])
-    )[20:24])
-
-def _tcp4load():
-    ''' Read the table of tcp connections & remove the header  '''
-    with open(PROC_TCP4,'r') as f:
-        content = f.readlines()
-        content.pop(0)
-    return content
-
-def _tcp6load():
-    ''' Read the table of tcpv6 connections & remove the header'''
-    with open(PROC_TCP6,'r') as f:
-        content = f.readlines()
-        content.pop(0)
-    return content
-
-def _udp4load():
-    '''Read the table of udp connections & remove the header '''
-    with open(PROC_UDP4,'r') as f:
-        content = f.readlines()
-        content.pop(0)
-    return content
-
-def _udp6load():
-    '''Read the table of udp connections & remove the header '''
-    with open(PROC_UDP6,'r') as f:
-        content = f.readlines()
-        content.pop(0)
-    return content
-
-def _hex2dec(s):
-    return str(int(s,16))
-
-def _ip(s):
-    ip = [(_hex2dec(s[6:8])),(_hex2dec(s[4:6])),(_hex2dec(s[2:4])),(_hex2dec(s[0:2]))]
-    return '.'.join(ip)
-
-def _ip6(s):
-    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]]
-    #print '66666:', ':'.join(ip), s
-    return ':'.join(ip)
-
-def _ip6q(s):
-    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]]
-    #print '666qqq:', ':'.join(ip), s
-    return ':'.join(ip)
-
-def _conv_v6(s):
-    return s
-	
-	
-
-def _remove_empty(array):
-    return [x for x in array if x !='']
-
-def _convert_ipv4_port(array):
-    host,port = array.split(':')
-    return _ip(host),_hex2dec(port)
-
-def _convert_ipv6_port(array):
-    host,port = array.split(':')
-    return _ip6(host),_hex2dec(port)
-
-def _convert_ipv6(array):
-    host,port = array.split(':')
-    return _ip6q(host)
-    
-def _addr_normal(s):
-    return ':'.join(["%x" % x for x in [int(x, 16) for x in s.split(':')]])
-    
-def _countFollowingZeros(l):
-    """Return number of elements containing 0 at the beginning of the list."""
-    #print 'aaa:', l
-    if len(l) == 0:
-        return 0
-    elif l[0] != 0:
-        return 0
-    else:
-        return 1 + _countFollowingZeros(l[1:])
-
-def _compress_v6(addr):
-    hextets = [int(x, 16) for x in addr.split(':')]
-    #print hextets
-    followingzeros = [0] * 8
-    for i in xrange(len(hextets)):
-        followingzeros[i] = _countFollowingZeros(hextets[i:])
-    # compressionpos is the position where we can start removing zeros
-    compressionpos = followingzeros.index(max(followingzeros))
-    if max(followingzeros) > 1:
-        # genererate string with the longest number of zeros cut out
-        # now we need hextets as strings
-        hextets = [x for x in _addr_normal(addr).split(':')]
-        while compressionpos < len(hextets) and hextets[compressionpos] == '0':
-            del(hextets[compressionpos])
-        hextets.insert(compressionpos, '')
-        if compressionpos + 1 >= len(hextets):
-            hextets.append('')
-        if compressionpos == 0:
-            hextets = [''] + hextets
-        return ':'.join(hextets)
-    else:
-        return _addr_normal(addr)
-
-
-def _resolve_ip(host):
-    """
-    resolve ip und update dictionary res_cache {'ip': 'name'}.
-    If resolution for a ip failed, 'name' is n_try ... 0.
-    """
-    try:
-        hname = socket.gethostbyaddr(host)[0]
-        return str(hname)
-    except:
-        return str(host)
-    
-    
-    
-    
-def netstat_tcp4():
-    '''
-    Function to return a list with status of tcp4 connections on Linux systems.
-    '''
-
-    tcpcontent =_tcp4load()
-    tcpresult = []
-    for line in tcpcontent:
-        line_array = _remove_empty(line.split(' '))     # Split lines and remove empty spaces.
-        l_host,l_port = _convert_ipv4_port(line_array[1]) # Convert ipaddress and port from hex to decimal.
-        r_host,r_port = _convert_ipv4_port(line_array[2])
-        tcp_id = line_array[0]
-        state = TCP_STATE[line_array[3]]
-        if state != 'LISTEN' and o_listen == True:
-            continue
-        if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
-            continue
-            
-        try:
-            uid = pwd.getpwuid(int(line_array[7]))[0]       # Get user from UID.
-        except:
-            uid = line_array[7]
-        inode = line_array[9]                           # Need the inode to get process pid.
-        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 = '-'
-        
-        if o_numeric == False:
-            r_host = _resolve_ip(r_host)
-        
-        nline = '%-7s %-24s  %-24s  %-11s  %-8s  %-6s  %-s' % ('TCP4', l_host+': '+l_port, r_host+': '+r_port, state, uid, pid, exe)
-        
-        tcpresult.append(nline)
-        
-        # update v4inv6check list
-        v4ports.append(l_port)
-        
-    return tcpresult
-
-def netstat_tcp6():
-    '''
-    This function returns a list of tcp connections utilizing ipv6. 
-    '''
-    tcpcontent = _tcp6load()
-    tcpresult = []
-    for line in tcpcontent:
-        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])
-        tcp_id = line_array[0]
-        state = TCP_STATE[line_array[3]]
-        if state != 'LISTEN' and o_listen == True:
-            continue
-        if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
-            continue
-            
-        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' % ('TCP6', _compress_v6(_convert_ipv6(line_array[1]))+': '+l_port, _compress_v6(_convert_ipv6(line_array[2]))+': '+r_port, state, uid, pid, exe)
-        
-        tcpresult.append(nline)
-        	
-    return tcpresult
-
-
-def netstat_tcp4in6():
-    '''
-    Returns a list of tcp ipv4 in ipv6 listen sockets.
-    '''    
-    #print xx()
-    
-    tcpcontent = _tcp6load()
-    tcpresult = []
-    for line in tcpcontent:
-        line_array = _remove_empty(line.split(' '))
-        #if TCP_STATE[line_array[3]] != 'LISTEN':
-        #	continue
-        
-        l_host,l_port = _convert_ipv6_port(line_array[1])
-        r_host,r_port = _convert_ipv6_port(line_array[2])
-        if grep_b(v4ports,l_port):
-            continue
-        tcp_id = line_array[0]
-        state = TCP_STATE[line_array[3]]
-        if state != 'LISTEN' and o_listen == True:
-            continue
-        if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
-            continue
-                
-        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 = '-'
-            
-        if l_host == '00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:01':
-        	if _check_v4inv6_port("127.0.0.1",l_port):
-        	    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)
-        	    tcpresult.append(nline)
-        if l_host == "00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00":
-        	if _check_v4inv6_port("0.0.0.0",l_port):
-        	    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)
-        	    tcpresult.append(nline)
-        #else:
-        #    for a in MYIFS.split():
-        #       _check_v4inv6_port(get_ip_address(a),l_port) 
-        
-    return tcpresult
-
-
-def netstat_udp4():
-    '''
-    Function to return a list with status of udp connections.
-    '''
-
-    udpcontent =_udp4load()
-    udpresult = []
-    for line in udpcontent:
-        line_array = _remove_empty(line.split(' '))
-        l_host,l_port = _convert_ipv4_port(line_array[1])
-        r_host,r_port = _convert_ipv4_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' % ('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
-    

si_netstat.py_SAV_formatted

@@ -1,513 +0,0 @@
-#!/usr/bin/python2
-
-# (c) 2016 by Siegrist(SystemLoesungen) <PSS@ZweierNet.ch>
-#
-# This program is based on a python netstat script that was written by da667 available on https://github.com/da667/netstat
-# who had it adapted from Ricardo Pascal, available on http://voorloopnul.com/blog/a-python-netstat-in-less-than-100-lines-of-code.
-#
-# This version of program has some improvements make it an acceptable alternative to the original netstat command.
-# So you can explore IPv4 in IPv6 listening sockets and much more verfied information then the original netstat.
-# 
-# This program is free software. Use it as you like.
-#
-
-
-import pwd
-import os
-import re
-import glob
-import socket
-import sys
-import string
-import fcntl
-import struct
-import argparse
-
-
-
-VERSION = '0.95'
-
-PROC_TCP4 = "/proc/net/tcp"
-PROC_UDP4 = "/proc/net/udp"
-PROC_TCP6 = "/proc/net/tcp6"
-PROC_UDP6 = "/proc/net/udp6"
-PROC_PACKET = "/proc/net/packet"
-
-MAX_IPV4_ADDRESS = 0xffffffff
-MAX_IPV6_ADDRESS = 0xffffffffffffffffffffffffffffffff
-TCP_STATE = {
-        '01':'ESTABLISHED',
-        '02':'SYN_SENT',
-        '03':'SYN_RECV',
-        '04':'FIN_WAIT1',
-        '05':'FIN_WAIT2',
-        '06':'TIME_WAIT',
-        '07':'CLOSE',
-        '08':'CLOSE_WAIT',
-        '09':'LAST_ACK',
-        '0A':'LISTEN',
-        '0B':'CLOSING'
-        }
-#MYIPV4 = os.popen('ip addr show eth0 | grep "\<inet\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
-#MYIPV6 = os.popen('ip addr show eth0 | grep "\<inet\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
-#MYIFS = os.popen("ifconfig | grep '^[a-z0-9]' | awk '{print $1}'").read().strip()
-
-v4ports = []
-opt_l = True
-
-def xx():
-    for a in MYIFS.split():
-        print 'IFF:', a
-        print 'v6:', os.popen('ip addr show ' + a + ' | grep "\<inet6\>" | awk \'{ print $2 }\' | awk -F "/" \'{ print $1 }\'').read().strip()
-
-def grep_b(list, search):
-    return [True for i in list if search in i]
-    
-def get_ip_address(ifname):
-    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-    return socket.inet_ntoa(fcntl.ioctl(
-        s.fileno(),
-        0x8915,  # SIOCGIFADDR
-        struct.pack('256s', ifname[:15])
-    )[20:24])
-
-def _tcp4load():
-    ''' Read the table of tcp connections & remove the header  '''
-    with open(PROC_TCP4,'r') as f:
-        content = f.readlines()
-        content.pop(0)
-    return content
-
-def _tcp6load():
-    ''' Read the table of tcpv6 connections & remove the header'''
-    with open(PROC_TCP6,'r') as f:
-        content = f.readlines()
-        content.pop(0)
-    return content
-
-def _udp4load():
-    '''Read the table of udp connections & remove the header '''
-    with open(PROC_UDP4,'r') as f:
-        content = f.readlines()
-        content.pop(0)
-    return content
-
-def _udp6load():
-    '''Read the table of udp connections & remove the header '''
-    with open(PROC_UDP6,'r') as f:
-        content = f.readlines()
-        content.pop(0)
-    return content
-
-def _hex2dec(s):
-    return str(int(s,16))
-
-def _ip(s):
-    ip = [(_hex2dec(s[6:8])),(_hex2dec(s[4:6])),(_hex2dec(s[2:4])),(_hex2dec(s[0:2]))]
-    return '.'.join(ip)
-
-def _ip6(s):
-    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]]
-    #print '66666:', ':'.join(ip), s
-    return ':'.join(ip)
-
-def _ip6q(s):
-    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]]
-    #print '666qqq:', ':'.join(ip), s
-    return ':'.join(ip)
-
-def _conv_v6(s):
-    return s
-	
-	
-
-def _remove_empty(array):
-    return [x for x in array if x !='']
-
-def _convert_ipv4_port(array):
-    host,port = array.split(':')
-    return _ip(host),_hex2dec(port)
-
-def _convert_ipv6_port(array):
-    host,port = array.split(':')
-    return _ip6(host),_hex2dec(port)
-
-def _convert_ipv6(array):
-    host,port = array.split(':')
-    return _ip6q(host)
-    
-def _addr_normal(s):
-    return ':'.join(["%x" % x for x in [int(x, 16) for x in s.split(':')]])
-
-def _countFollowingZeros(l):
-    """Return number of elements containing 0 at the beginning of the list."""
-    #print 'aaa:', l
-    if len(l) == 0:
-        return 0
-    elif l[0] != 0:
-        return 0
-    else:
-        return 1 + _countFollowingZeros(l[1:])
-
-def _compress_v6(addr):
-    hextets = [int(x, 16) for x in addr.split(':')]
-    #print hextets
-    followingzeros = [0] * 8
-    for i in xrange(len(hextets)):
-        followingzeros[i] = _countFollowingZeros(hextets[i:])
-    # compressionpos is the position where we can start removing zeros
-    compressionpos = followingzeros.index(max(followingzeros))
-    if max(followingzeros) > 1:
-        # genererate string with the longest number of zeros cut out
-        # now we need hextets as strings
-        hextets = [x for x in _addr_normal(addr).split(':')]
-        while compressionpos < len(hextets) and hextets[compressionpos] == '0':
-            del(hextets[compressionpos])
-        hextets.insert(compressionpos, '')
-        if compressionpos + 1 >= len(hextets):
-            hextets.append('')
-        if compressionpos == 0:
-            hextets = [''] + hextets
-        return ':'.join(hextets)
-    else:
-        return _addr_normal(addr)
-
-
-def _resolve_ip(host):
-    """
-    resolve ip und update dictionary res_cache {'ip': 'name'}.
-    If resolution for a ip failed, 'name' is n_try ... 0.
-    """
-    try:
-        hname = socket.gethostbyaddr(host)[0]
-        return str(hname)
-    except:
-        return str(host)
-    
-    
-    
-    
-def netstat_tcp4():
-    '''
-    Function to return a list with status of tcp4 connections on Linux systems.
-    '''
-
-    tcpcontent =_tcp4load()
-    tcpresult = []
-    for line in tcpcontent:
-        line_array = _remove_empty(line.split(' '))     # Split lines and remove empty spaces.
-        l_host,l_port = _convert_ipv4_port(line_array[1]) # Convert ipaddress and port from hex to decimal.
-        r_host,r_port = _convert_ipv4_port(line_array[2])
-        tcp_id = line_array[0]
-        state = TCP_STATE[line_array[3]]
-        if state != 'LISTEN' and o_listen == True:
-            continue
-        if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
-            continue
-            
-        try:
-            uid = pwd.getpwuid(int(line_array[7]))[0]       # Get user from UID.
-        except:
-            uid = line_array[7]
-        inode = line_array[9]                           # Need the inode to get process pid.
-        if int(inode) > 0:
-            pid = _get_pid_of_inode(inode)
-            try:                                            # try read the process name.
-                exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
-            except:
-                exe = '-'
-        else:
-            pid = '-'
-            exe = '-'
-        
-        if o_numeric == False:
-            r_host = _resolve_ip(r_host)
-        
-        nline = '%-7s %-32s  %-32s  %-11s  %-8s  %-6s  %-s' % ('TCP4', l_host+':'+'\033[1m'+l_port+'\033[0m', r_host+':'+'\033[1m'+r_port+'\033[0m', state, uid, pid, exe)
-        
-        tcpresult.append(nline)
-        
-        # update v4inv6check list
-        v4ports.append(l_port)
-        
-    return tcpresult
-
-def netstat_tcp6():
-    '''
-    This function returns a list of tcp connections utilizing ipv6. 
-    '''
-    tcpcontent = _tcp6load()
-    tcpresult = []
-    for line in tcpcontent:
-        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])
-        tcp_id = line_array[0]
-        state = TCP_STATE[line_array[3]]
-        if state != 'LISTEN' and o_listen == True:
-            continue
-        if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
-            continue
-            
-        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.
-                exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
-            except:
-                exe = '-'
-        else:
-            pid = '-'
-            exe = '-'
-
-        nline = '%-7s %-32s  %-32s  %-11s  %-8s  %-6s  %-s' % ('TCP6', _compress_v6(_convert_ipv6(line_array[1]))+':'+'\033[1m'+l_port+'\033[0m', _compress_v6(_convert_ipv6(line_array[2]))+':'+'\033[1m'+r_port+'\033[0m', state, uid, pid, exe)
-        
-        tcpresult.append(nline)
-        	
-    return tcpresult
-
-
-def netstat_tcp4in6():
-    '''
-    Returns a list of tcp ipv4 in ipv6 listen sockets.
-    '''    
-    #print xx()
-    
-    tcpcontent = _tcp6load()
-    tcpresult = []
-    for line in tcpcontent:
-        line_array = _remove_empty(line.split(' '))
-        #if TCP_STATE[line_array[3]] != 'LISTEN':
-        #	continue
-        
-        l_host,l_port = _convert_ipv6_port(line_array[1])
-        r_host,r_port = _convert_ipv6_port(line_array[2])
-        if grep_b(v4ports,l_port):
-            continue
-        tcp_id = line_array[0]
-        state = TCP_STATE[line_array[3]]
-        if state != 'LISTEN' and o_listen == True:
-            continue
-        if ( state == 'LISTEN' or state == 'SYN_SENT' or state == 'SYN_RECV' ) and o_estab == True:
-            continue
-                
-        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.
-                exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
-            except:
-                exe = '-'
-        else:
-            pid = '-'
-            exe = '-'
-            
-        if l_host == '00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:01':
-        	if _check_v4inv6_port("127.0.0.1",l_port):
-        	    nline = '%-7s %-32s  %-32s  %-11s  %-8s  %-6s  %-s' % ('TCP4in6', '127.0.0.1:'+'\033[1m'+l_port+'\033[0m', _compress_v6(_convert_ipv6(line_array[2]))+':'+'\033[1m'+r_port+'\033[0m', state, uid, pid, exe)
-        	    tcpresult.append(nline)
-        if l_host == "00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00":
-        	if _check_v4inv6_port("0.0.0.0",l_port):
-        	    nline = '%-7s %-32s  %-32s  %-11s  %-8s  %-6s  %-s' % ('TCP4in6', '0.0.0.0:'+'\033[1m'+l_port+'\033[0m', _compress_v6(_convert_ipv6(line_array[2]))+':'+'\033[1m'+r_port+'\033[0m', state, uid, pid, exe)
-        	    tcpresult.append(nline)
-        #else:
-        #    for a in MYIFS.split():
-        #       _check_v4inv6_port(get_ip_address(a),l_port) 
-        
-    return tcpresult
-
-
-def netstat_udp4():
-    '''
-    Function to return a list with status of udp connections.
-    '''
-
-    udpcontent =_udp4load()
-    udpresult = []
-    for line in udpcontent:
-        line_array = _remove_empty(line.split(' '))
-        l_host,l_port = _convert_ipv4_port(line_array[1])
-        r_host,r_port = _convert_ipv4_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.
-                exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
-            except:
-                exe = '-'
-        else:
-            pid = '-'
-            exe = '-'
-
-        nline = '%-7s %-32s  %-32s  %-11s  %-8s  %-6s  %-s' % ('UDP4', l_host+':'+'\033[1m'+l_port+'\033[0m', r_host+':'+'\033[1m'+r_port+'\033[0m', 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.
-                exe = os.readlink('/proc/'+pid+'/exe').split('/')[-1]
-            except:
-                exe = '-'
-        else:
-            pid = '-'
-            exe = '-'
-
-        nline = '%-7s %-32s  %-32s  %-11s  %-8s  %-6s  %-s' % ('UDP6', _compress_v6(_convert_ipv6(line_array[1]))+':'+'\033[1m'+l_port+'\033[0m', _compress_v6(_convert_ipv6(line_array[2]))+':'+'\033[1m'+r_port+'\033[0m', 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_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('-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.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
-