Re: dev Digest, Vol 169, Issue 7

[Michael Hubbard <michael.hubbard999 () gmail com>]

Hello Stefan;
I don't know how to help, but I am excited to see the finished product! Good luck. 

Michael Hubbard


> On Apr 6, 2019, at 12:00, dev-request () nmap org wrote:
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> Today's Topics:
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>   1. Questions about custom IP/UDP/RPC packets (ste0640)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Fri, 5 Apr 2019 20:36:13 +0000
> From: ste0640 <ste0640 () thi de>
> To: "dev () nmap org" <dev () nmap org>
> Subject: Questions about custom IP/UDP/RPC packets
> Message-ID: <c7434a6c8eab4329a8da876c3df8e1ff () thi de>
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>
> Hi everyone,
>
>
>
> I hope I am not at the wrong place here for questions.
>
>
>
> I tried to write a script to discover profinet devices on an ip address and get information about them. Mostly to 
> test the knowledge I gathered about this topic in an internship and maybe make it useable for others too.
>
> I am new to lua and the nmap libs but they seemed suitable for this task.
>
>
>
> So I used a hex string for my packet and tried to send first with bind, connect and send, after that with ip_open and 
> ip_send. Both times the packet which I captured with Wireshark had no checksum although I calculated it and put it in 
> the right place.
>
> Does somebody know what I have done wrong? Or did I understand the documentation in the wrong way?
>
>
>
> Thanks in advance if somebody can help me there. Even if it's only a link for further studies.
>
>
>
> Regards,
>
> Stefan
>
>
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> End of dev Digest, Vol 169, Issue 7
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