Dolda2000 GitWeb
/
icmp-dn.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
Updated cksum.
[icmp-dn.git]
/
idnlookup.c
diff --git
a/idnlookup.c
b/idnlookup.c
index
bd45b75
..
43518ef
100644
(file)
--- a/
idnlookup.c
+++ b/
idnlookup.c
@@
-86,7
+86,7
@@
void cksum(void *hdr, size_t len)
struct icmphdr *ih;
u_int8_t *cb;
int i;
struct icmphdr *ih;
u_int8_t *cb;
int i;
-
u_int8_
t b1, b2;
+
in
t b1, b2;
ih = (struct icmphdr *)hdr;
cb = (u_int8_t *)hdr;
ih = (struct icmphdr *)hdr;
cb = (u_int8_t *)hdr;
@@
-98,9
+98,22
@@
void cksum(void *hdr, size_t len)
}
if(i & 1)
b1 += cb[len - 1];
}
if(i & 1)
b1 += cb[len - 1];
+ while(1) {
+ if(b1 >= 256) {
+ b2 += b1 >> 8;
+ b1 &= 0xff;
+ continue;
+ }
+ if(b2 >= 256) {
+ b1 += b2 >> 8;
+ b2 &= 0xff;
+ continue;
+ }
+ break;
+ }
cb = (u_int8_t *)&ih->checksum;
cb = (u_int8_t *)&ih->checksum;
- cb[0] = ~b1;
- cb[1] = ~b2;
+ cb[0] = ~
(u_int8_t)
b1;
+ cb[1] = ~
(u_int8_t)
b2;
}
void usage(void)
}
void usage(void)