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| From: | Bill Auerbach |
| Subject: | RE: [lwip-users] lwip 1.3.0 "ping of death" |
| Date: | Mon, 7 Apr 2008 11:59:36 -0400 |
|
Maybe ICMP doesn’t support
fragmentation and you need to use ping –f to tell it not to fragment? Bill From:
address@hidden
[mailto:address@hidden On Behalf Of Martin Birkebæk, IO-Connect
ApS Hi list, I
have succesfully ported lwip 1.3.0 to LPC2468. Lwip is running in a threaded
environment, FreeRTOS. I have a basic example running, with a webserver. I
have enabled ip reassembly, see my lwipopts.h file attached to this mail. I
have a webbrowser running, which is requesting a webpage from the webserver
each second, and I am pinging the system continually, through the command The
system is running ok. But if I ping the system with a lot of data bytes, i.e.
ping <ip> -l 2048. The system crashes. I
end up in an data abort exception. The reason for this exception, is a pointer,
r, in function ip_reass() is containing an invalid address. The
line in C code is: iprh
= (struct
ip_reass_helper*)r->payload;
// line number: 572 in ip_frag.c What
can I do, to avoid this “ping of death” ? P.S.:
Please be aware that I have yet to optimize the system regarding values in
lwipopts.h. But that will be a topic for another question on this list. Regards, Martin |
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