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Commit 0dec456d authored by Stephen Hemminger's avatar Stephen Hemminger Committed by David S. Miller
Browse files

[NET]: Add CONFIG_NETDEBUG to suppress bad packet messages. 



If you are on a hostile network, or are running protocol tests, you can
easily get the logged swamped by messages about bad UDP and ICMP packets.
This turns those messages off unless a config option is enabled.

Signed-off-by: default avatarStephen Hemminger <shemminger@osdl.org>
Acked-by: default avatarDave Jones <davej@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6e2be3ea

include/net/sock.h

+4 −4
Original line number Diff line number Diff line
@@ -1354,12 +1354,12 @@ extern int sock_get_timestamp(struct sock *, struct timeval __user *); 
 *	Enable debug/info messages 

 */



#if 0

#define NETDEBUG(fmt, args...)	do { } while (0)

#define LIMIT_NETDEBUG(fmt, args...) do { } while(0)

#else

#ifdef CONFIG_NETDEBUG

#define NETDEBUG(fmt, args...)	printk(fmt,##args)

#define LIMIT_NETDEBUG(fmt, args...) do { if (net_ratelimit()) printk(fmt,##args); } while(0)

#else

#define NETDEBUG(fmt, args...)	do { } while (0)

#define LIMIT_NETDEBUG(fmt, args...) do { } while(0)

#endif



/*

net/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -27,6 +27,13 @@ if NET 


menu "Networking options"



config NETDEBUG

	bool "Network packet debugging"

	help

	  You can say Y here if you want to get additional messages useful in

	  debugging bad packets, but can overwhelm logs under denial of service

	  attacks.



source "net/packet/Kconfig"

source "net/unix/Kconfig"

source "net/xfrm/Kconfig"