netdev - [PATCH] iputils-s20101006.tar.bz2: "-w deadline" starts after "-c" xmitted, and "-c" was exceeded for flood ping

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <7D3B6706FA74174B8C1AC24710890745136F454081@USNAVSXCHMBSA1.ndc.alcatel-lucent.com>
Date:	Tue, 10 Jan 2012 12:00:42 -0600
From:	"Cloutier, Joseph (Joseph)" <joseph.cloutier@...atel-lucent.com>
To:	"'YOSHIFUJI Hideaki'" <yoshfuji@...ux-ipv6.org>
CC:	"'netdev@...r.kernel.org'" <netdev@...r.kernel.org>,
	"'Linus Torvalds'" <torvalds@...ux-foundation.org>
Subject: [PATCH] iputils-s20101006.tar.bz2: "-w deadline" starts after "-c"
 xmitted, and "-c" was exceeded for flood ping

From: Joseph Cloutier <jcloutier@...atel-lucent.com>

2 changes to ping & ping6.  Only ping_common.c affected.
  1- changed "-w deadline" to start deadline after "-c" pings have been transmitted, instead of from start of run.
  2- fixed bug where > "-c" pings are sent in flood ping mode when "-w deadline" option is also used.
Reason:
  Linux flood ping is an invaluable tool to finding duplex bugs, fiber problems, NE config problems-  especially
  when used to trouble shoot wireless system backhaul problems.  ANY dropped pings are red flag indicators.
  Current ping problem is that it terminates sometimes when outstanding pings are in transit, giving FALSE red
  flags.  Change "-w deadline" to start after last "-c" transmitted ping allows cleanup of stragglers.  Second fix is
  when "-f" option is running, "-c" is not rigorously checked when generating pings  A more rigorous check was
  added.

Signed-off-by: Joseph Cloutier <jcloutier@...atel-lucent.com>

---
--- iputils-s20101006/ping_common.c.orig        2012-01-10 10:37:40.399719858 -0500
+++ iputils-s20101006/ping_common.c     2012-01-10 11:33:37.084662882 -0500
@@ -523,16 +523,6 @@ void setup(int icmp_sock)

        gettimeofday(&start_time, NULL);

-       if (deadline) {
-               struct itimerval it;
-
-               it.it_interval.tv_sec = 0;
-               it.it_interval.tv_usec = 0;
-               it.it_value.tv_sec = deadline;
-               it.it_value.tv_usec = 0;
-               setitimer(ITIMER_REAL, &it, NULL);
-       }
-
        if (isatty(STDOUT_FILENO)) {
                struct winsize w;

@@ -553,6 +543,7 @@ void main_loop(int icmp_sock, __u8 *pack
        int cc;
        int next;
        int polling;
+       int sig_deadline = 0;

        iov.iov_base = (char *)packet;

@@ -567,9 +558,22 @@ void main_loop(int icmp_sock, __u8 *pack
                /* Check for and do special actions. */
                if (status_snapshot)
                        status();
+               if((npackets == ntransmitted) && deadline &&
+                       (sig_deadline == 0)){
+                       sig_deadline++;
+                       struct itimerval it;
+
+                       it.it_interval.tv_sec = 0;
+                       it.it_interval.tv_usec = 0;
+                       it.it_value.tv_sec = deadline;
+                       it.it_value.tv_usec = 0;
+                       setitimer(ITIMER_REAL, &it, NULL);
+               }

                /* Send probes scheduled to this time. */
                do {
+                       if(npackets == ntransmitted)
+                               break;
                        next = pinger();
                        next = schedule_exit(next);
                } while (next <= 0);
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html