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List: wireshark-dev
Subject: [Wireshark-dev] Internet Protocol: Header checksum BAD:True
From: "Rach, Darshan" <DarshanR () nds ! com>
Date: 2009-11-24 13:28:00
Message-ID: B62CF7DC92D6EF4E9E7C7D3155F3ACAC3D05CC0413 () INMA1 ! in ! nds ! com
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Hi,
I have developed a C# application like this.
public static void Main()
{
UdpClient sock = new UdpClient();
IPEndPoint iep = new IPEndPoint(IPAddress.Parse("10.201.234.112"), 32773);
int discarded;
byte[] data = HexEncoding.GetBytes("000300250000feca676574766f642e636f6de7424d5f \
3136313100000e10001505424d5f313631315f776974685f747261696c6f7200000edf090edc0554686572 \
65206172652074776f20726561736f6e7320666f722069742e20536865206c656674204d756d6261692061 \
6e642053616c6d616e204b68616e2077697468207468652070726f6d697365207468617420686572206269 \
7274686461792074686973207965617220776f756c642073747269636c747920626520612066616d696c79 \
206166666169722e204120667269656e64206f6620746865206269727468646179206769726c2073616964 \
2c20537570706f736520736865206d61646520616e20657863657074696f6e206a757374206265636175736520627564647920416b736861792077617320696e204c6f6e64", \
out discarded); sock.Send(data, data.Length, iep);
}
When I send packets this way, I am getting an exception when I sniff through \
Wireshark.
[cid:image001.png@01CA6D36.5DADC010]
Kindly let me know what might have gone wrong?
Regards,
Darshan
________________________________
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have developed a C# application like this.<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;
font-family:"Courier New";color:blue"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;
font-family:"Courier New";color:blue">public</span><span \
style="font-size:10.0pt; font-family:"Courier New"">
<span style="color:blue">static</span> <span style="color:blue">void</span> \
Main()<o:p></o:p></span></p> <p class="MsoNormal" style="text-autospace:none"><span \
style="font-size:10.0pt; font-family:"Courier New"">{<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:.5in;text-autospace:none"><span \
style="font-size:10.0pt;font-family:"Courier \
New";color:teal">UdpClient</span><span \
style="font-size:10.0pt;font-family:"Courier New""> sock = <span \
style="color:blue">new</span> <span \
style="color:teal">UdpClient</span>();<o:p></o:p></span></p> <p class="MsoNormal" \
style="text-autospace:none"><span style="font-size:10.0pt; font-family:"Courier \
New""> <span style="color:teal">IPEndPoint</span> \
iep = <span style="color:blue">new</span> <span \
style="color:teal">IPEndPoint</span>(<span \
style="color:teal">IPAddress</span>.Parse(<span \
style="color:maroon">"10.201.234.112"</span>), \
32773);<o:p></o:p></span></p> <p class="MsoNormal" style="text-autospace:none"><span \
style="font-size:10.0pt; font-family:"Courier \
New""> <span style="color:blue">int</span> \
discarded;<o:p></o:p></span></p> <p class="MsoNormal" \
style="text-autospace:none"><span style="font-size:10.0pt; font-family:"Courier \
New""> <span style="color:blue">byte</span>[] data \
= <span style="color:teal">HexEncoding</span>.GetBytes(<span \
style="color:maroon">"000300250000feca676574766f642e636f6de7424d5f3136313100000e1 \
0001505424d5f313631315f776974685f747261696c6f7200000edf090edc0554686572652061726520747 \
76f20726561736f6e7320666f722069742e20536865206c656674204d756d62616920616e642053616c6d6 \
16e204b68616e2077697468207468652070726f6d697365207468617420686572206269727468646179207 \
4686973207965617220776f756c642073747269636c747920626520612066616d696c79206166666169722 \
e204120667269656e64206f6620746865206269727468646179206769726c20736169642c20537570706f7 \
36520736865206d61646520616e20657863657074696f6e206a757374206265636175736520627564647920416b736861792077617320696e204c6f6e64"</span>,
<span style="color:blue">out</span> discarded);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier \
New""> sock.Send(data, data.Length, \
iep);<o:p></o:p></span></p> <p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Courier New"">}<o:p></o:p></span></p> \
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier \
New""><o:p> </o:p></span></p> <p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Courier New"">When I send packets this \
way, I am getting an exception when I sniff through Wireshark.<o:p></o:p></span></p> \
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier \
New""><o:p> </o:p></span></p> <p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Courier New""><img width="1024" \
height="738" id="Picture_x0020_1" \
src="cid:image001.png@01CA6D36.5DADC010"><o:p></o:p></span></p> <p \
class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">Kindly let me know what \
might have gone wrong?<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Darshan<o:p></o:p></p>
</div>
<br>
<hr>
<font face="Arial" color="Gray" size="1">This message is confidential and intended \
only for the addressee. If you have received this message in error, please \
immediately notify the postmaster@nds.com and delete it from your system as well as \
any copies. The content of e-mails as well as traffic data may be monitored by NDS \
for employment and security purposes.<br> To protect the environment please do not \
print this e-mail unless necessary.<br> <br>
An NDS Group Limited company. www.nds.com<br>
</font>
</body>
</html>
["image001.png" (image/png)]
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