title: TCP Traceroute in python
body: <p>I am writing a python script to perform 'TCP Traceroute'. I learned scapy is a useful library to do this but I`m not getting the results I need. Can anyone help me resolve this?  I want the python script to generate similar results as command line.</p>
  
  <p>I am using linux, python 2.7 with scapy 2.4. I am not sure why same ip addresses are shown for all the hops.</p>
  
  <pre><code>from scapy.layers.inet import traceroute
  
  result, unans = traceroute('172.217.17.46', maxttl=30)
     for snd, rcv in result:
     print snd.ttl, rcv.src, snd.sent_time, rcv.time
  </code></pre>
  
  <p>When I run this code I get following results:</p>
  
  <pre><code>1 10.0.2.2 1541113255.58 1541113255.6
  2 172.217.17.46 1541113255.58 1541113255.72
  3 172.217.17.46 1541113255.58 1541113255.72
  4 172.217.17.46 1541113255.58 1541113255.72
  5 172.217.17.46 1541113255.59 1541113255.73
  6 172.217.17.46 1541113255.59 1541113255.73
  7 172.217.17.46 1541113255.6 1541113255.74
  8 172.217.17.46 1541113255.6 1541113255.74
  9 172.217.17.46 1541113255.6 1541113255.74
  10 172.217.17.46 1541113255.61 1541113255.75
  11 172.217.17.46 1541113255.61 1541113255.75
  12 172.217.17.46 1541113255.61 1541113255.75
  13 172.217.17.46 1541113255.62 1541113255.76
  14 172.217.17.46 1541113255.62 1541113255.76
  15 172.217.17.46 1541113255.62 1541113255.76
  16 172.217.17.46 1541113255.62 1541113255.77
  17 172.217.17.46 1541113255.63 1541113255.77
  18 172.217.17.46 1541113255.63 1541113255.77
  19 172.217.17.46 1541113255.63 1541113255.77
  20 172.217.17.46 1541113255.63 1541113255.77
  21 172.217.17.46 1541113255.64 1541113255.78
  22 172.217.17.46 1541113255.64 1541113255.78
  23 172.217.17.46 1541113255.64 1541113255.78
  24 172.217.17.46 1541113255.64 1541113255.78
  25 172.217.17.46 1541113255.65 1541113255.79
  26 172.217.17.46 1541113255.65 1541113255.79
  27 172.217.17.46 1541113255.65 1541113255.79
  28 172.217.17.46 1541113255.66 1541113255.8
  29 172.217.17.46 1541113255.66 1541113255.8
  30 172.217.17.46 1541113255.66 1541113255.8
  </code></pre>
  
  <p>I want to get the same results which I get when I run tcptraceroute from command line: tcptraceroute 172.217.17.46</p>
  
  <p>Result from command line:</p>
  
  <pre><code>Selected device en0, address 192.168.86.24, port 49618 for outgoing packets
  Tracing the path to 172.217.17.46 on TCP port 80 (http), 30 hops max
   1  192.168.86.1  2.848 ms  1.224 ms  1.330 ms
   2  96.120.101.53  10.423 ms  13.646 ms  12.221 ms
   3  po-115-rur102.bellevue.wa.seattle.comcast.net (68.87.205.245)  18.877 ms  18.818 ms  12.593 ms
   4  be-103-ar01.seattle.wa.seattle.comcast.net (69.139.164.77)  15.188 ms  14.272 ms  14.005 ms
   5  be-33650-cr01.seattle.wa.ibone.comcast.net (68.86.93.165)  14.547 ms  15.273 ms  19.750 ms
   6  be-10846-pe01.seattle.wa.ibone.comcast.net (68.86.86.90)  14.546 ms  14.266 ms  13.521 ms
   7  50.242.150.242  14.159 ms  15.791 ms  14.037 ms
   8  74.125.243.195  14.635 ms  22.377 ms  13.558 ms
   9  72.14.236.174  15.051 ms  27.454 ms  14.312 ms
   10  108.170.235.60  66.430 ms  69.762 ms  68.606 ms
   11  216.239.58.255  85.531 ms  84.354 ms  85.303 ms
   12  172.253.51.157  153.310 ms  154.710 ms  153.375 ms
   13  209.85.142.166  157.376 ms  166.552 ms  157.562 ms
   14  216.239.43.37  170.523 ms  168.040 ms  158.182 ms
   15  108.170.241.225  158.953 ms  161.418 ms  169.103 ms
   16  108.170.236.137  158.561 ms  161.635 ms  157.510 ms
   17  ams16s29-in-f46.1e100.net (172.217.17.46) [open]  165.981 ms  160.451 ms  166.120 ms
  </code></pre>
  
  <p>Question1: Is scapy traceroute function really does TCP traceroute? 
  Question2: I am new to scapy and traceroute, Is there something obvious I am missing in the code? Is there any other library which I can use if scapy is not suitable? I would really appreciate the help and any pointers.</p>
  
  <p>NOTE: I WANT TO PERFORM TCP TRACE ROUTE FOR BOTH IPV6 AND IPV4.</p>