Date: Fri, 20 Aug 1999 09:40:22 -0700 From: Tamiji Homma <thomma@baynetworks.com> To: freebsd-current@freebsd.org Subject: ping/egcs Message-ID: <19990820094022B.thomma@baynetworks.com>
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Hi,
I just came across the problem with ping and egcs. If you do
# ping -s 57 localhost
PING localhost (127.0.0.1): 57 data bytes
^C
--- localhost ping statistics ---
2 packets transmitted, 0 packets received, 100% packet loss
if the data size is even number, it works OK. I think that
the problem is that EGCS generates bad code in in_cksum()
with -O.
Compiling with -O0 solves the problem as well as applying
following patch fixes it.
I wonder if how many problems like this go unnoticed....
*** ping.c-org Fri Aug 20 09:38:33 1999
--- ping.c Fri Aug 20 09:39:08 1999
***************
*** 944,949 ****
--- 944,950 ----
/* mop up an odd byte, if necessary */
if (nleft == 1) {
*(u_char *)(&answer) = *(u_char *)w ;
+ *((u_char *)(&answer)+1) = 0;
sum += answer;
}
Tammy
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