linux-kernel - Re: [PATCH 6/6] Netfilter: xt

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Date:	Wed, 07 Mar 2012 16:33:41 +0100
From:	Richard Weinberger <richard@....at>
To:	Pablo Neira Ayuso <pablo@...filter.org>
CC:	jengelh@...ozas.de, eric.dumazet@...il.com,
	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

On 07.03.2012 16:29, Pablo Neira Ayuso wrote:
> 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.

Which gcc version are you using?
I've not seen this warning. :(

Thanks,
//richard
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