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sysctl'ize ICMP_BANDLIM and ICMP_BANDLIM_SUPPRESS_OUTPUT.

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Suggested by: des/nbm
This commit is contained in:
Dan Moschuk 2000-05-22 16:12:28 +00:00
parent fcdc02160f
commit 4f14ee00f2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=60798
13 changed files with 10 additions and 65 deletions
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1
sys/alpha/conf/GENERIC
View File

@ -64,7 +64,6 @@ options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
options P1003_1B #Posix P1003_1B real-time extentions
options _KPOSIX_PRIORITY_SCHEDULING
options ICMP_BANDLIM #Rate limit bad replies
# Standard busses
device isa

1
sys/alpha/conf/NOTES
View File

@ -64,7 +64,6 @@ options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
options P1003_1B #Posix P1003_1B real-time extentions
options _KPOSIX_PRIORITY_SCHEDULING
options ICMP_BANDLIM #Rate limit bad replies
# Standard busses
device isa

1
sys/amd64/conf/GENERIC
View File

@ -51,7 +51,6 @@ options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
options P1003_1B #Posix P1003_1B real-time extensions
options _KPOSIX_PRIORITY_SCHEDULING
options ICMP_BANDLIM #Rate limit bad replies
options KBD_INSTALL_CDEV # install a CDEV entry in /dev
# To make an SMP kernel, the next two are needed

8
sys/conf/NOTES
View File

@ -542,14 +542,6 @@ options TCPDEBUG
options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN
options TCP_RESTRICT_RST #restrict emission of TCP RST
# ICMP_BANDLIM enables icmp error response bandwidth limiting. You
# typically want this option as it will help protect the machine from
# D.O.S. packet attacks. Use ICMP_BANDLIM_SUPPRESS_OUTPUT to prevent
# bandwidth limit messages from being dumped to console.
#
options ICMP_BANDLIM
options ICMP_BANDLIM_SUPPRESS_OUTPUT
# DUMMYNET enables the "dummynet" bandwidth limiter. You need
# IPFIREWALL as well. See the dummynet(4) manpage for more info.
# BRIDGE enables bridging between ethernet cards -- see bridge(4).

2
sys/conf/options
View File

@ -87,8 +87,6 @@ MSGSEG opt_sysvipc.h
MSGSSZ opt_sysvipc.h
MSGTQL opt_sysvipc.h
UCONSOLE
ICMP_BANDLIM
ICMP_BANDLIM_SUPPRESS_OUTPUT opt_icmp_bandlim.h
VFS_AIO
# POSIX kernel options

1
sys/i386/conf/GENERIC
View File

@ -51,7 +51,6 @@ options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
options P1003_1B #Posix P1003_1B real-time extensions
options _KPOSIX_PRIORITY_SCHEDULING
options ICMP_BANDLIM #Rate limit bad replies
options KBD_INSTALL_CDEV # install a CDEV entry in /dev
# To make an SMP kernel, the next two are needed

8
sys/i386/conf/LINT
View File

@ -542,14 +542,6 @@ options TCPDEBUG
options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN
options TCP_RESTRICT_RST #restrict emission of TCP RST
# ICMP_BANDLIM enables icmp error response bandwidth limiting. You
# typically want this option as it will help protect the machine from
# D.O.S. packet attacks. Use ICMP_BANDLIM_SUPPRESS_OUTPUT to prevent
# bandwidth limit messages from being dumped to console.
#
options ICMP_BANDLIM
options ICMP_BANDLIM_SUPPRESS_OUTPUT
# DUMMYNET enables the "dummynet" bandwidth limiter. You need
# IPFIREWALL as well. See the dummynet(4) manpage for more info.
# BRIDGE enables bridging between ethernet cards -- see bridge(4).

8
sys/i386/conf/NOTES
View File

@ -542,14 +542,6 @@ options TCPDEBUG
options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN
options TCP_RESTRICT_RST #restrict emission of TCP RST
# ICMP_BANDLIM enables icmp error response bandwidth limiting. You
# typically want this option as it will help protect the machine from
# D.O.S. packet attacks. Use ICMP_BANDLIM_SUPPRESS_OUTPUT to prevent
# bandwidth limit messages from being dumped to console.
#
options ICMP_BANDLIM
options ICMP_BANDLIM_SUPPRESS_OUTPUT
# DUMMYNET enables the "dummynet" bandwidth limiter. You need
# IPFIREWALL as well. See the dummynet(4) manpage for more info.
# BRIDGE enables bridging between ethernet cards -- see bridge(4).

5
sys/netinet/icmp_var.h
View File

@ -37,9 +37,6 @@
#ifndef _NETINET_ICMP_VAR_H_
#define _NETINET_ICMP_VAR_H_
#ifdef _KERNEL
#include "opt_icmp_bandlim.h" /* for ICMP_BANDLIM */
#endif
/*
* Variables related to this implementation
@ -79,9 +76,7 @@ struct icmpstat {
#ifdef _KERNEL
SYSCTL_DECL(_net_inet_icmp);
#ifdef ICMP_BANDLIM
extern int badport_bandlim __P((int));
#endif
#endif
#endif

24
sys/netinet/ip_icmp.c
View File

@ -91,23 +91,13 @@ static int log_redirect = 0;
SYSCTL_INT(_net_inet_icmp, OID_AUTO, log_redirect, CTLFLAG_RW,
&log_redirect, 0, "");
#ifdef ICMP_BANDLIM
/*
* ICMP error-response bandwidth limiting sysctl. If not enabled, sysctl
* variable content is -1 and read-only.
*/
static int icmplim = 200;
SYSCTL_INT(_net_inet_icmp, ICMPCTL_ICMPLIM, icmplim, CTLFLAG_RW,
&icmplim, 0, "");
#else
static int icmplim = -1;
SYSCTL_INT(_net_inet_icmp, ICMPCTL_ICMPLIM, icmplim, CTLFLAG_RD,
&icmplim, 0, "");
#endif
static int icmplim_output = 1;
SYSCTL_INT(_net_inet_icmp, OID_AUTO, icmplim_output, CTLFLAG_RW,
&icmplim_output, 0, "");
/*
* ICMP broadcast echo sysctl
@ -800,7 +790,6 @@ ip_next_mtu(mtu, dir)
}
#endif
#ifdef ICMP_BANDLIM
/*
* badport_bandlim() - check for ICMP bandwidth limit
@ -842,13 +831,11 @@ badport_bandlim(int which)
*/
if ((unsigned int)dticks > hz) {
if (lpackets[which] > icmplim) {
#ifndef ICMP_BANDLIM_SUPPRESS_OUTPUT
if (lpackets[which] > icmplim && icmplim_output) {
printf("icmp-response bandwidth limit %d/%d pps\n",
lpackets[which],
icmplim
);
#endif
}
lticks[which] = ticks;
lpackets[which] = 0;
@ -864,6 +851,3 @@ badport_bandlim(int which)
return(0);
}
#endif

6
sys/netinet/tcp_input.c
View File

@ -60,7 +60,7 @@
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h> /* for ICMP_BANDLIM */
#include <netinet/ip_icmp.h>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet/in_var.h>
@ -75,7 +75,7 @@
#ifdef INET6
#include <netinet6/ip6_var.h>
#endif
#include <netinet/icmp_var.h> /* for ICMP_BANDLIM */
#include <netinet/icmp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_seq.h>
@ -2251,10 +2251,8 @@ tcp_input(m, off0, proto)
* we think we are under attack or not.
*/
maybedropwithreset:
#ifdef ICMP_BANDLIM
if (badport_bandlim(1) < 0)
goto drop;
#endif
/* fall through */
dropwithreset:
#ifdef TCP_RESTRICT_RST

6
sys/netinet/tcp_reass.c
View File

@ -60,7 +60,7 @@
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h> /* for ICMP_BANDLIM */
#include <netinet/ip_icmp.h>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet/in_var.h>
@ -75,7 +75,7 @@
#ifdef INET6
#include <netinet6/ip6_var.h>
#endif
#include <netinet/icmp_var.h> /* for ICMP_BANDLIM */
#include <netinet/icmp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_seq.h>
@ -2251,10 +2251,8 @@ tcp_input(m, off0, proto)
* we think we are under attack or not.
*/
maybedropwithreset:
#ifdef ICMP_BANDLIM
if (badport_bandlim(1) < 0)
goto drop;
#endif
/* fall through */
dropwithreset:
#ifdef TCP_RESTRICT_RST

4
sys/netinet/udp_usrreq.c
View File

@ -350,10 +350,10 @@ udp_input(m, off, proto)
goto bad;
}
*ip = save_ip;
#ifdef ICMP_BANDLIM
if (badport_bandlim(0) < 0)
goto bad;
#endif
if (!blackhole)
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
else