Anonymous - 2012-04-21

Hi~ I want to send packets to
However, there're some problems I cannot solve.

Here's the picture:,iqSNh,iqSNh#1

1. In IPv4 data ("Header length")
Header length of the packets I want to send is 20.
But the "Header length"  only accepts one digit number.
How to solve this kind of problem?

The packets I want to send didn't specify "TOS"(In IPv4 data) & "urgent pionter"(In TCP data)
Are these two arguments important when sending  TCP packets?

3.In IPv4 data ("options 0x")
TCP data options of the packets I want to send is 0x12
But it kept showing error message:"Wrong length of tcp options field(length mod 8 must be 0)"
0x12 mod 8 should be zero, I also tried 0x08, 0x00…etc. But the error message didn't change.
I have no idea why this happens, is it relevant to "Header length"?

Thanks! Any thought and help will be appreciated.