From: Pierre Lombard <pierre.lombard@imag.fr>
To: linux-kernel@vger.kernel.org
Subject: [PATCH] small doc update for /proc/sys/net/ipv4/icmp_rate{mask,limit}
Date: Wed, 12 Dec 2001 13:27:22 +0100 [thread overview]
Message-ID: <20011212122722.GA21997@sci41.imag.fr> (raw)
[-- Attachment #1: Type: text/plain, Size: 196 bytes --]
Hi,
Comments in the C code are incorrect and the documentation is
outdated.
Attached patch is for 2.4.17-pre8 but probably applies cleanly
against 2.5.x too.
--
Best regards,
Pierre Lombard
[-- Attachment #2: 20011212-icmpmask.diff --]
[-- Type: text/plain, Size: 1737 bytes --]
--- linux-2.4.17-pre8~/Documentation/networking/ip-sysctl.txt Wed Dec 12 12:52:25 2001
+++ linux-2.4.17-pre8/Documentation/networking/ip-sysctl.txt Wed Dec 12 12:53:17 2001
@@ -309,13 +309,20 @@
ICMP ECHO requests sent to it or just those to broadcast/multicast
addresses, respectively.
-icmp_destunreach_rate - INTEGER
-icmp_paramprob_rate - INTEGER
-icmp_timeexceed_rate - INTEGER
-icmp_echoreply_rate - INTEGER (not enabled per default)
- Limit the maximal rates for sending ICMP packets to specific targets.
+icmp_ratelimit - INTEGER
+ Limit the maximal rates for sending ICMP packets whose type matches
+ icmp_ratemask (see below) to specific targets.
0 to disable any limiting, otherwise the maximal rate in jiffies(1)
- See the source for more information.
+ Default: 1
+
+icmp_ratemask - INTEGER
+ Mask made of ICMP types for which rates are being limited.
+ Default: 6168
+ Note: 6168 = 0x1818 = 1<<ICMP_DEST_UNREACH + 1<<ICMP_SOURCE_QUENCH +
+ 1<<ICMP_TIME_EXCEEDED + 1<<ICMP_PARAMETERPROB, which means
+ dest unreachable (3), source quench (4), time exceeded (11)
+ and parameter problem (12) ICMP packets are rate limited
+ (check values in icmp.h)
icmp_ignore_bogus_error_responses - BOOLEAN
Some routers violate RFC 1122 by sending bogus responses to broadcast
--- linux-2.4.17-pre8~/net/ipv4/icmp.c Wed Dec 12 12:48:56 2001
+++ linux-2.4.17-pre8/net/ipv4/icmp.c Wed Dec 12 12:51:41 2001
@@ -154,8 +154,8 @@
* it's bit position.
*
* default:
- * dest unreachable (0x03), source quench (0x04),
- * time exceeded (0x11), parameter problem (0x12)
+ * dest unreachable (3), source quench (4),
+ * time exceeded (11), parameter problem (12)
*/
int sysctl_icmp_ratelimit = 1*HZ;
next reply other threads:[~2001-12-12 12:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-12 12:27 Pierre Lombard [this message]
2001-12-13 0:37 ` [PATCH] small doc update for /proc/sys/net/ipv4/icmp_rate{mask,limit} David S. Miller
2001-12-13 8:57 ` Pierre Lombard
2001-12-13 8:59 ` David S. Miller
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