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albright
Advocate
Joined: 16 Nov 2003
Posts: 2588
Location: Near Toronto
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 Posted: Thu Apr 16, 2015 5:45 pm Post subject: ping |
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when I ping an unreachable address ping returns
| Code: | WARNING: kernel is not very fresh, upgrade is recommended.
From olorin (192.168.0.5): icmp_seq=2 Destination Host Unreachable
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It is true I am using that ancient kernel ... 4.0.0
so what is going on?
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doing as simply messing about with Linux ...
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papahuhn
l33t
Joined: 06 Sep 2004
Posts: 626
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| Posted: Thu Apr 16, 2015 7:01 pm Post subject: |
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This is considered a bug and has been removed in Debian from iputils:
| Code: |
Remove buggy working_recverr checks per bug#709052
Index: iputils/ping.c
===================================================================
--- iputils.orig/ping.c 2013-12-08 13:41:47.077791445 -0800
+++ iputils/ping.c 2013-12-08 13:43:25.238278205 -0800
@@ -654,17 +654,6 @@
acknowledge(ntohs(icmph.un.echo.sequence));
- if (!working_recverr) {
- struct icmp_filter filt;
- working_recverr = 1;
- /* OK, it works. Add stronger filter. */
- filt.data = ~((1<<ICMP_SOURCE_QUENCH)|
- (1<<ICMP_REDIRECT)|
- (1<<ICMP_ECHOREPLY));
- if (setsockopt(icmp_sock, SOL_RAW, ICMP_FILTER, (char*)&filt, sizeof(filt)) == -1)
- perror("\rWARNING: setsockopt(ICMP_FILTER)");
- }
-
net_errors++;
nerrors++;
if (options & F_QUIET)
@@ -820,19 +809,7 @@
icp->type != ICMP_SOURCE_QUENCH);
if (error_pkt) {
acknowledge(ntohs(icp1->un.echo.sequence));
- if (working_recverr) {
- return 0;
- } else {
- static int once;
- /* Sigh, IP_RECVERR for raw socket
- * was broken until 2.4.9. So, we ignore
- * the first error and warn on the second.
- */
- if (once++ == 1)
- fprintf(stderr, "\rWARNING: kernel is not very fresh, upgrade is recommended.\n");
- if (once == 1)
- return 0;
- }
+ return 0;
}
nerrors+=error_pkt;
if (options&F_QUIET)
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