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authorStephen Hemminger <shemminger@osdl.org>2006-02-02 20:40:09 -0800
committerDavid S. Miller <davem@davemloft.net>2006-02-02 20:40:09 -0800
commit0dec456d1fe73e0539625f0973ee8ef8fb805943 (patch)
tree56d37da8d8e37154030d3f45224ae852195977e6
parent6e2be3ea4fab4d1c02e369719311e8d7ae6cc7c1 (diff)
[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 <shemminger@osdl.org> Acked-by: Dave Jones <davej@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/sock.h8
-rw-r--r--net/Kconfig7
2 files changed, 11 insertions, 4 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 1806e5b6141..30758035d61 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 bc603d9aea5..5126f58d9c4 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"