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Re: [lwip-users] Callback when get any IP or ICMP packet?
From: |
narke |
Subject: |
Re: [lwip-users] Callback when get any IP or ICMP packet? |
Date: |
Sat, 8 Oct 2011 23:29:52 +0800 |
On 8 October 2011 16:51, Simon Goldschmidt <address@hidden> wrote:
> narke <address@hidden> wrote:
>
>> Could you please shortly hint me how to do it using raw pcb? Many thanks!
>
> RAW pcbs are used to send/receive IP packets and implement other transport
> protocols on it. For example, the ping example app in contrib uses a raw pcb
> or socket to send ICMP requests and receive responses. You can find out more
> about that by examining the ping source code.
>>
>>>
>
> On RX, when using a raw pcb, you can tell lwIP wether you handled the packet
> (called "eat" it) or pass it on to the rest of the stack. When using a raw
> socket, you always receive a copy of the packet.
>
> Simon
Simon,
For the technical you mentioned, would you please show me a code
illustration? I just need to 'listen' on any IP packet coming to my
interface but without changing it. Hacking ip_input() might be a
solution (as Kieran probably pointed out), but I am looking for a
better way.
Thanks in advance.
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--
Life is the only flaw in an otherwise perfect nonexistence
-- Schopenhauer
narke
public key at http://subkeys.pgp.net:11371 (address@hidden)
- [lwip-users] Callback when get any IP or ICMP packet?, narke, 2011/10/08
- Re: [lwip-users] Callback when get any IP or ICMP packet?, Simon Goldschmidt, 2011/10/08
- Re: [lwip-users] Callback when get any IP or ICMP packet?, narke, 2011/10/08
- Re: [lwip-users] Callback when get any IP or ICMP packet?, Simon Goldschmidt, 2011/10/08
- Re: [lwip-users] Callback when get any IP or ICMP packet?,
narke <=
- Re: [lwip-users] Callback when get any IP or ICMP packet?, Simon Goldschmidt, 2011/10/08
- Re: [lwip-users] Callback when get any IP or ICMP packet?, Paul Archer, 2011/10/09
- Re: [lwip-users] Callback when get any IP or ICMP packet?, Simon Goldschmidt, 2011/10/10
- Re: [lwip-users] Callback when get any IP or ICMP packet?, narke, 2011/10/12
- Re: [lwip-users] Callback when get any IP or ICMP packet?, narke, 2011/10/09