[108] in Athena Bugs
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daemon@ATHENA.MIT.EDU (don@ATHENA.MIT.EDU)
Thu Mar 31 15:27:06 1988
From: <don@ATHENA.MIT.EDU>
Date: Thu, 31 Mar 88 15:26:36 EST
To: bugs@ATHENA.MIT.EDU
here's a fix for ping's "odd-byte" bug:
in the checksum routine, replace the lines
if( nleft == 1)
sum += *(u_char*)w;
with
if( nleft == 1) {
((u_char *)w)[1] = '\0';
sum += *w;
}
i ran into this when i borrowed ping's checksum to use in track.
the existing checksum gives different results on the rt & the vax,
if it's passed an odd number of bytes. interestingly, the results
seem always to differ by the value 0x9f6 == 2550. weird.
-don
