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[lwip-devel] [bug #26658] ping tool ICMP checksum error.


From: hanhui
Subject: [lwip-devel] [bug #26658] ping tool ICMP checksum error.
Date: Sun, 24 May 2009 12:39:35 +0000
User-agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.1.4322; MEGAUPLOAD 2.0)

Follow-up Comment #1, bug #26658 (project lwip):

I have a advice,

need for speed, htons() htonl() ...

is macro like this:

#define LWIP_PLATFORM_HTONL(x)      (u32_t)((((x) & 0x000000ff) << 24) |     
 
                                            (((x) & 0x0000ff00) <<  8) |     
 
                                            (((x) & 0x00ff0000) >>  8) |     
 
                                            (((x) & 0xff000000) >> 24))

if like ping tool use htons() like this :

iecho->seqno  = htons(++ping_seq_num);

it will be error!!!

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  <http://savannah.nongnu.org/bugs/?26658>

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