Unless a destination is specified by IP address, a ping flood results in a
gethostbyaddr() for every echo reply. Thus a DNS flood can accompany a
ping flood.
This patch makes it so a gethostbyaddr() is not performed with each echo
reply during a ping flood.
Signed-off-by: Chris Caputo <[EMAIL PROTECTED]>
---
ping_common.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
===================================================================
diff -ur iputils-s20071127/ping_common.c iputils/ping_common.c
--- iputils-s20071127/ping_common.c 2007-11-27 00:57:27.000000000 +0000
+++ iputils/ping_common.c 2008-02-06 12:38:01.000000000 +0000
@@ -114,10 +114,6 @@
case 'd':
options |= F_SO_DEBUG;
break;
- case 'f':
- options |= F_FLOOD;
- setbuf(stdout, (char *)NULL);
- break;
case 'i': /* wait between sending packets */
{
if (strchr(optarg, '.')) {
@@ -168,6 +164,10 @@
exit(2);
}
break;
+ case 'f':
+ options |= F_FLOOD;
+ setbuf(stdout, (char *)NULL);
+ /* fallthrough to numeric - avoid gethostbyaddr during flood */
case 'n':
options |= F_NUMERIC;
break;
--
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