From 0dec456d1fe73e0539625f0973ee8ef8fb805943 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Thu, 2 Feb 2006 20:40:09 -0800 Subject: [PATCH] [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: Stephen Hemminger Acked-by: Dave Jones Signed-off-by: David S. Miller --- include/net/sock.h | 8 ++++---- net/Kconfig | 7 +++++++ 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/include/net/sock.h b/include/net/sock.h index 1806e5b61419..30758035d616 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -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 /* diff --git a/net/Kconfig b/net/Kconfig index bc603d9aea56..5126f58d9c44 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -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" -- 2.20.1