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<DIV><FONT face=Arial size=2>Hello,</FONT></DIV>
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<DIV style="FONT: 10pt arial">ip_len = (ih->ver_ihl & 0xf) *
4;</DIV></BLOCKQUOTE>
<DIV style="FONT: 10pt arial">Look here <A
href="http://www.freesoft.org/CIE/Course/Section3/7.htm">http://www.freesoft.org/CIE/Course/Section3/7.htm</A></DIV>
<DIV style="FONT: 10pt arial"> </DIV>
<DIV style="FONT: 10pt arial">The (& 0xf) is there to only get the four bits
of ih->ver_ihl, and (* 4) is there so that we get the header length in bytes,
not in 32bit words.</DIV>
<DIV style="FONT: 10pt arial"> </DIV>
<DIV style="FONT: 10pt arial">Bye,</DIV>
<DIV style="FONT: 10pt arial">Ramiro Polla</DIV></BODY></HTML>