linux-kernel - [PATCH 2/2] Netfilter: xt_LOG: Add timestamp support

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Message-Id: <1329262573-22048-2-git-send-email-richard@nod.at>
Date:	Wed, 15 Feb 2012 00:36:13 +0100
From:	Richard Weinberger <richard@....at>
To:	netfilter-devel@...r.kernel.org
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	eric.dumazet@...il.com, jengelh@...ozas.de, rostedt@...dmis.org,
	pablo@...filter.org, basti@...l.de,
	Richard Weinberger <richard@....at>
Subject: [PATCH 2/2] Netfilter: xt_LOG: Add timestamp support

Using XT_LOG_ADD_TIMESTAMP it is possible to have a timestamp
directly in the log message.

Signed-off-by: Richard Weinberger <richard@....at>
---
 include/linux/netfilter/xt_LOG.h |    1 +
 net/netfilter/xt_LOG.c           |   10 ++++++++++
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/include/linux/netfilter/xt_LOG.h b/include/linux/netfilter/xt_LOG.h
index e4b1177..d84710c 100644
--- a/include/linux/netfilter/xt_LOG.h
+++ b/include/linux/netfilter/xt_LOG.h
@@ -8,6 +8,7 @@
 #define XT_LOG_UID		0x08	/* Log UID owning local socket */
 #define XT_LOG_NFLOG		0x10	/* Unsupported, don't reuse */
 #define XT_LOG_MACDECODE	0x20	/* Decode MAC header */
+#define XT_LOG_ADD_TIMESTAMP	0x40	/* Add a timestamp */
 #define XT_LOG_MASK		0x6f
 
 struct xt_log_info {
diff --git a/net/netfilter/xt_LOG.c b/net/netfilter/xt_LOG.c
index 211d341..bd59dfd 100644
--- a/net/netfilter/xt_LOG.c
+++ b/net/netfilter/xt_LOG.c
@@ -490,6 +490,16 @@ log_packet_common(struct sbuff *m,
 	if (loginfo->type == NF_LOG_TYPE_LOG)
 		sb_add(m, "<%d>", loginfo->u.log.level);
 
+	if (loginfo->u.log.logflags & XT_LOG_ADD_TIMESTAMP) {
+		static struct timespec tv;
+		unsigned int msec;
+
+		getnstimeofday(&tv);
+		msec = tv.tv_nsec;
+		do_div(msec, 1000000);
+		sb_add(m, "TIMESTAMP=%li.%03li ", tv.tv_sec, msec);
+	}
+
 	sb_add(m, "%sIN=%s OUT=%s ", prefix, in ? in->name : "",
 	       out ? out->name : "");
 #ifdef CONFIG_BRIDGE_NETFILTER
-- 
1.7.7.3

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