Author Archives: daveti

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About daveti

Interested in kernel hacking, compilers, machine learning and guitars.

itevad – How to write your own protocol and its stack – part 7

Posted on April 19, 2012 by daveti

Previous_Part_6 From this post, we will have to learn Flex and Bison, which are assumed to have very bizarre grammars to write and understand. Fortunately, we will step forwardly from Flex standalone, Flex+Bison and Flex+Bison+C finally. Please kindly note that … Continue reading →

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itevad – How to write your own protocol and its stack – part 6

Posted on April 19, 2012 by daveti

Previous_Part_5 From this post, we will start our Flex and Bison journey. Before that, we will need a clarification for BNF and ABNF again and give ABNF description of Iitevad accordingly. As mentioned in General Background, BNF and ABNF are … Continue reading →

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itevad – How to write your own protocol and its stack – part 5

Posted on April 19, 2012 by daveti

Previous_Part_4 In this post, we will begin our Itevad Protocol Text Encoder. Again, with the help of ASN.1 compiler, we have already got the structure of Itevad itself. Moreover, we have implemented binary encoder and decoder in previous post. For … Continue reading →

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itevad – How to write your own protocol and its stack – part 4

Posted on April 19, 2012 by daveti

Previous_Part_3 In this post, we will continue our Itevad Protocol Binary Ber Decoder. With the help of ANS.1 compiler, not only do we get the structural description of Itevad protocol itself but also the necessary converting functions used to convert … Continue reading →

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itevad – How to write your own protocol and its stack – part 3

Posted on April 19, 2012 by daveti

Previous_Part_2 In this post, we will focus on writing Itevad Protocol Binary Ber Encoder. With the necessary headers and sources generated in Part_2, now we could write our Ber Encoder. Then we will run our encoder and use hexdump to … Continue reading →

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itevad – How to write your own protocol and its stack – part 2

Posted on April 19, 2012 by daveti

Previous_Part_1 In this part, we will start to play with ASN.1 and asn1c – installing open source ASN.1 compiler, asn1c, writing ANS.1 description of Itevad and then compiling. Please note we will not cover detailed grammar of ASN.1 or how … Continue reading →

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itevad – How to write your own protocol and its stack – part 1

Posted on April 19, 2012 by daveti

From this post, as well as the following 4~6 posts, I will try to illustrate how to write your own protocol and its stack, step by step. You will learn all the related stuffs to write a carrier grade telecommunication … Continue reading →

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jmgsim again – jmgsim-ov, git and github fantastic!

Posted on April 10, 2012 by daveti

While Kenny (kenny.du@alcatel-lucent.com) is refactoring ‘jmgsim’ in java.net, I am looking for a better code repository to hold my initial, tested and verified source code of jmgsim for my personal reference as well as design mapping in first_post_of_jmgsim. Finally I … Continue reading →

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uninit member in destructor – Coverity UNINIT and UNINIT_CTOR checkers

Posted on March 14, 2012 by daveti

Recently we encountered a serious bug like the code below – destructor function delete one member ptr, which was never init’d. At first, we were assuming checker UNINIT could help figure it out as we do not see any difference … Continue reading →

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jmgsim – a Java implementation of H.248 media gateway simulator

Posted on March 13, 2012 by daveti

‘jmgsim’ is a Java implementation of H.248 Media Gateway (MG) simulator and Media Gateway Controller (MGC) simulator used for testing real MG/MGC. It is coded within NetBeans 7.1 and has been published as a public project at ‘java.net’, as ‘kenai’ … Continue reading →

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