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Re: [lwip-devel] [patch #6539] ICMP broadcast

From: Frédéric BERNON
Subject: Re: [lwip-devel] [patch #6539] ICMP broadcast
Date: Fri, 13 Jun 2008 00:33:59 +0200

I don't have your chance: on a subnet, from a windows pc, ping only reports the first answer (with wireshark, I can see that everyone replies). But since you can't detect more than the IP subnet, it's not a very useful detection method.

----- Original Message ----- From: "Alain M." <address@hidden>
To: "lwip-devel" <address@hidden>
Sent: Friday, June 13, 2008 12:07 AM
Subject: Re: [lwip-devel] [patch #6539] ICMP broadcast

I can answer that: I didn't know of that broadcast ping, but I tested here on my LAN and it works. The answer is:

that is usefull for manual operation. You just go to any client machine and ping and you hava a list of everything. I surely will use it in the future :)


Bill Auerbach escreveu:
Every program I've looked at and responses to questions asked about it implement autoconfiguration with UDP broadcasts. I've done the same with lwIP and it works great. Why use ICMP?


I needed ICMP to be able to respond to broadcast pings for
I added flags: LWIP_BROADCAST_PING and LWIP_MULTICAST_PING that can be
in lwipopts.h if you want broadcast pings. The only patched file is

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