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PORaw socket python packet sniffer
 

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  1. PORaw socket python packet sniffer
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    <p>I have created a simple RAW socket based packet sniffer. But when I run it, it rarely captures up a packet. First I created this to capture packets in 1 second time intervals, but seeing no packets are captured I commented that line. I was connected to internet and a lot of http traffic are going here and there, but I could not capture a one. Is there a problem in this in the code where I created the socket? Please someone give me a solution. I am fairly new to python programming and could not understand how to solve this.</p> <pre><code>import socket, binascii, struct import time sock = socket.socket(socket.PF_PACKET, socket.SOCK_RAW, socket.htons(0x800)) print "Waiting.." pkt = sock.recv(2048) print "received" def processEth(data): #some code to process source mac and dest. mac return [smac, dmac] def processIP(data): sip = str(binascii.hexlify(data[1])) dip = str(binascii.hexlify(data[2])) return [sip, dip] def processTCP(data): sport = str(data[0]) dport = str(data[1]) return [sport, dport] while len(pkt) &gt; 0 : if(len(pkt)) &gt; 54: pkt = sock.recv(2048) ethHeader = pkt[0][0:14] ipHeader = pkt[0][14:34] tcpHeader = pkt[0][34:54] ethH = struct.unpack("!6s6s2s",ethHeader) ethdata = processEth(ethH) ipH = struct.unpack("!12s4s4s",ipHeader) ipdata = processIP(ipH) tcpH = struct.unpack("!HH16", tcpHeader) tcpdata = processTCP(tcpH) print "S.mac "+ethdata[0]+" D.mac "+ethdata[1]+" from: "+ipdata[0]+":"+tcpdata[0]+" to: "+ipdata[1]+":"+tcpdata[1] #time.sleep(1); else: continue </code></pre>
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    1. COFYI. http://stackoverflow.com/questions/6878603/strange-raw-socket-on-mac-os-x
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