netdev - Re: [PATCH 6/6] Netfilter: xt_LOG: Add timestamp support

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Date:	Wed, 07 Mar 2012 07:40:46 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Pablo Neira Ayuso <pablo@...filter.org>
Cc:	Richard Weinberger <richard@....at>, jengelh@...ozas.de,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, rostedt@...dmis.org
Subject: Re: [PATCH 6/6] Netfilter: xt_LOG: Add timestamp support

Le mercredi 07 mars 2012 à 16:29 +0100, Pablo Neira Ayuso a écrit :
> On Tue, Mar 06, 2012 at 12:19:48AM +0100, Richard Weinberger wrote:
> > 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 |    3 ++-
> >  net/netfilter/xt_LOG.c           |    8 ++++++++
> >  2 files changed, 10 insertions(+), 1 deletions(-)
> > 
> > diff --git a/include/linux/netfilter/xt_LOG.h b/include/linux/netfilter/xt_LOG.h
> > index 8ac25e0..9361374 100644
> > --- a/include/linux/netfilter/xt_LOG.h
> > +++ b/include/linux/netfilter/xt_LOG.h
> > @@ -8,7 +8,8 @@
> >  #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_MASK		0x2f
> > +#define XT_LOG_ADD_TIMESTAMP	0x40    /* Add a timestamp */
> > +#define XT_LOG_MASK		0x6f
> >  
> >  struct xt_log_info {
> >          unsigned char level;
> > diff --git a/net/netfilter/xt_LOG.c b/net/netfilter/xt_LOG.c
> > index f75f2d7..23db206 100644
> > --- a/net/netfilter/xt_LOG.c
> > +++ b/net/netfilter/xt_LOG.c
> > @@ -499,6 +499,14 @@ 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) {
> > +		struct timespec tv;
> > +
> > +		getnstimeofday(&tv);
> > +		sb_add(m, "TIMESTAMP=%li.%03u ", tv.tv_sec,
> > +			(unsigned int)tv.tv_nsec / NSEC_PER_MSEC);
> 
> net/netfilter/xt_LOG.c: In function ‘log_packet_common’:
> net/netfilter/xt_LOG.c:507:4: warning: format ‘%u’ expects argument of
> type ‘unsigned int’, but argument 4 has type ‘long int’ [-Wformat]
> 
> It has to be:
> 
>                 sb_add(m, "TIMESTAMP=%li.%03u ", tv.tv_sec,
>                         (unsigned int)(tv.tv_nsec / NSEC_PER_MSEC));
>                                       ^                          ^
> I've fixed, no need to resend this patch.

This is why I submitted the "netfilter: ipt_LOG: add __printf() to
sb_add()" patch :)



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