Day To Day Technology Updates: Testing Not to do source address selection for TCP connections

Tuesday, May 8, 2012

Testing Not to do source address selection for TCP connections

Target IPv6 addresses:
2010:0002:0002:0002:FFF2:FFF2:FFF2:FFF2/64
2010:0002:0002:0002:0002:0002:0002:0002/64

FreeBSD IPv6 address:
2010:0002:0002:0002:0002:0002:0002:0003/64

No default routers.

Now, if you do "ftp 2010:0002:0002:0002:FFF2:FFF2:FFF2:FFF2" from FreeBSD, the SYN reply should come from "2010:0002:0002:0002:FFF2:FFF2:FFF2:FFF2". Not from "2010:0002:0002:0002:0002:0002:0002:0002".

If the target performs source address selection, the reply will come from the matching address "2010:0002:0002:0002:0002:0002:0002:0002" and the connection will fail.

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Topics

1) Pitfalls in your favaourite OS
2) Embedded coding techniques
4 byte boundary
Reentrant
Stack space and global space
Interrupt - Task shared variable protected
Cache
Out-of-order synchronization
3) Protocol stack which will run with/without OS
4) Easily portoable kernel OS
5) OS API specifications
6) What do you want? What do you long for? Implement it? Learn to be sophisticated.
OS, SMP, AMP, Hypervisor sample pseudo coding

Hardware OS

Linux SMP and AMP implementation details

Give algorithms that live forever, that inspires everyone

Write small programs & utilities and publish

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Keep always something in desktop to read

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8) Run Linux on Multi-core kernels and see
9) Get into Kernel API implementations
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Thoughts

Connect always yourself to what you become want to.

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Be Connected. Be Updated. Be Innovative.

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Do not think anything as technical. Just map them into real world analogy. It will give you easy understanding and will enable you to provide more optimized solutions by emulating them using real world objects at low cost.

Let's think. Algorithm is there.