Added support for ipt_time

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2854 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 240 insertions, 0 deletions

diff --git a/target/linux/linux-2.4/config/brcm b/target/linux/linux-2.4/config/brcm
index bc375e0ed..09344cda2 100644
--- a/target/linux/linux-2.4/config/brcm
+++ b/target/linux/linux-2.4/config/brcm
@@ -378,6 +378,7 @@ CONFIG_IP_NF_MATCH_PKTTYPE=m
 CONFIG_IP_NF_MATCH_MARK=y
 CONFIG_IP_NF_MATCH_MULTIPORT=y
 CONFIG_IP_NF_MATCH_TOS=m
+CONFIG_IP_NF_MATCH_TIME=m
 CONFIG_IP_NF_MATCH_CONDITION=m
 CONFIG_IP_NF_MATCH_RECENT=m
 CONFIG_IP_NF_MATCH_ECN=m
diff --git a/target/linux/linux-2.4/patches/generic/618-netfilter_time.patch b/target/linux/linux-2.4/patches/generic/618-netfilter_time.patch
new file mode 100644
index 000000000..3593571b4
--- /dev/null
+++ b/target/linux/linux-2.4/patches/generic/618-netfilter_time.patch
@@ -0,0 +1,238 @@
+diff -urN linux-2.4.32.orig/net/ipv4/netfilter/Config.in linux-2.4.32/net/ipv4/netfilter/Config.in
+--- linux-2.4.32.orig/net/ipv4/netfilter/Config.in	2006-01-07 12:11:37.000000000 +0100
++++ linux-2.4.32/net/ipv4/netfilter/Config.in	2006-01-07 12:15:45.000000000 +0100
+@@ -48,6 +48,7 @@
+   dep_tristate '  netfilter MARK match support' CONFIG_IP_NF_MATCH_MARK $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  Multiple port match support' CONFIG_IP_NF_MATCH_MULTIPORT $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  TOS match support' CONFIG_IP_NF_MATCH_TOS $CONFIG_IP_NF_IPTABLES
++  dep_tristate '  TIME match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_TIME $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  condition match support' CONFIG_IP_NF_MATCH_CONDITION $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  recent match support' CONFIG_IP_NF_MATCH_RECENT $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  ECN match support' CONFIG_IP_NF_MATCH_ECN $CONFIG_IP_NF_IPTABLES
+diff -urN linux-2.4.32.orig/net/ipv4/netfilter/ipt_time.c linux-2.4.32/net/ipv4/netfilter/ipt_time.c
+--- linux-2.4.32.orig/net/ipv4/netfilter/ipt_time.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.32/net/ipv4/netfilter/ipt_time.c	2006-01-07 12:14:32.000000000 +0100
+@@ -0,0 +1,193 @@
++/*
++  This is a module which is used for time matching
++  It is using some modified code from dietlibc (localtime() function)
++  that you can find at http://www.fefe.de/dietlibc/
++  This file is distributed under the terms of the GNU General Public
++  License (GPL). Copies of the GPL can be obtained from: ftp://prep.ai.mit.edu/pub/gnu/GPL
++  2001-05-04 Fabrice MARIE <fabrice@netfilter.org> : initial development.
++  2001-21-05 Fabrice MARIE <fabrice@netfilter.org> : bug fix in the match code,
++     thanks to "Zeng Yu" <zengy@capitel.com.cn> for bug report.
++  2001-26-09 Fabrice MARIE <fabrice@netfilter.org> : force the match to be in LOCAL_IN or PRE_ROUTING only.
++  2001-30-11 Fabrice : added the possibility to use the match in FORWARD/OUTPUT with a little hack,
++     added Nguyen Dang Phuoc Dong <dongnd@tlnet.com.vn> patch to support timezones.
++  2004-05-02 Fabrice : added support for date matching, from an idea of Fabien COELHO.
++*/
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ipt_time.h>
++#include <linux/time.h>
++
++MODULE_AUTHOR("Fabrice MARIE <fabrice@netfilter.org>");
++MODULE_DESCRIPTION("Match arrival timestamp/date");
++MODULE_LICENSE("GPL");
++
++struct tm
++{
++	int tm_sec;                   /* Seconds.     [0-60] (1 leap second) */
++	int tm_min;                   /* Minutes.     [0-59] */
++	int tm_hour;                  /* Hours.       [0-23] */
++	int tm_mday;                  /* Day.         [1-31] */
++	int tm_mon;                   /* Month.       [0-11] */
++	int tm_year;                  /* Year - 1900.  */
++	int tm_wday;                  /* Day of week. [0-6] */
++	int tm_yday;                  /* Days in year.[0-365] */
++	int tm_isdst;                 /* DST.         [-1/0/1]*/
++
++	long int tm_gmtoff;           /* we don't care, we count from GMT */
++	const char *tm_zone;          /* we don't care, we count from GMT */
++};
++
++void
++localtime(const time_t *timepr, struct tm *r);
++
++static int
++match(const struct sk_buff *skb,
++      const struct net_device *in,
++      const struct net_device *out,
++      const void *matchinfo,
++      int offset,
++      const void *hdr,
++      u_int16_t datalen,
++      int *hotdrop)
++{
++	const struct ipt_time_info *info = matchinfo;   /* match info for rule */
++	struct tm currenttime;                          /* time human readable */
++	u_int8_t days_of_week[7] = {64, 32, 16, 8, 4, 2, 1};
++	u_int16_t packet_time;
++	struct timeval kerneltimeval;
++	time_t packet_local_time;
++
++	/* if kerneltime=1, we don't read the skb->timestamp but kernel time instead */
++	if (info->kerneltime)
++	{
++		do_gettimeofday(&kerneltimeval);
++		packet_local_time = kerneltimeval.tv_sec;
++	}
++	else
++		packet_local_time = skb->stamp.tv_sec;
++
++	/* First we make sure we are in the date start-stop boundaries */
++	if ((packet_local_time < info->date_start) || (packet_local_time > info->date_stop))
++		return 0; /* We are outside the date boundaries */
++
++	/* Transform the timestamp of the packet, in a human readable form */
++	localtime(&packet_local_time, &currenttime);
++
++	/* check if we match this timestamp, we start by the days... */
++	if ((days_of_week[currenttime.tm_wday] & info->days_match) != days_of_week[currenttime.tm_wday])
++		return 0; /* the day doesn't match */
++
++	/* ... check the time now */
++	packet_time = (currenttime.tm_hour * 60) + currenttime.tm_min;
++	if ((packet_time < info->time_start) || (packet_time > info->time_stop))
++		return 0;
++
++	/* here we match ! */
++	return 1;
++}
++
++static int
++checkentry(const char *tablename,
++           const struct ipt_ip *ip,
++           void *matchinfo,
++           unsigned int matchsize,
++           unsigned int hook_mask)
++{
++	struct ipt_time_info *info = matchinfo;   /* match info for rule */
++
++	/* First, check that we are in the correct hooks */
++	if (hook_mask
++            & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD) | (1 << NF_IP_LOCAL_OUT)))
++	{
++		printk("ipt_time: error, only valid for PRE_ROUTING, LOCAL_IN, FORWARD and OUTPUT)\n");
++		return 0;
++	}
++	/* we use the kerneltime if we are in forward or output */
++	info->kerneltime = 1;
++	if (hook_mask & ~((1 << NF_IP_FORWARD) | (1 << NF_IP_LOCAL_OUT))) 
++		/* we use the skb time */
++		info->kerneltime = 0;
++
++	/* Check the size */
++	if (matchsize != IPT_ALIGN(sizeof(struct ipt_time_info)))
++		return 0;
++	/* Now check the coherence of the data ... */
++	if ((info->time_start > 1439) ||        /* 23*60+59 = 1439*/
++	    (info->time_stop  > 1439))
++	{
++		printk(KERN_WARNING "ipt_time: invalid argument\n");
++		return 0;
++	}
++
++	return 1;
++}
++
++static struct ipt_match time_match = {
++	.name		= "time",
++	.match		= match,
++	.checkentry	= checkentry,
++	.me		= THIS_MODULE,
++};
++
++static int __init init(void)
++{
++	printk("ipt_time loading\n");
++	return ipt_register_match(&time_match);
++}
++
++static void __exit fini(void)
++{
++	ipt_unregister_match(&time_match);
++	printk("ipt_time unloaded\n");
++}
++
++module_init(init);
++module_exit(fini);
++
++
++/* The part below is borowed and modified from dietlibc */
++
++/* seconds per day */
++#define SPD 24*60*60
++
++void
++localtime(const time_t *timepr, struct tm *r) {
++	time_t i;
++	time_t timep;
++	extern struct timezone sys_tz;
++	const unsigned int __spm[12] =
++		{ 0,
++		  (31),
++		  (31+28),
++		  (31+28+31),
++		  (31+28+31+30),
++		  (31+28+31+30+31),
++		  (31+28+31+30+31+30),
++		  (31+28+31+30+31+30+31),
++		  (31+28+31+30+31+30+31+31),
++		  (31+28+31+30+31+30+31+31+30),
++		  (31+28+31+30+31+30+31+31+30+31),
++		  (31+28+31+30+31+30+31+31+30+31+30),
++		};
++	register time_t work;
++
++	timep = (*timepr) - (sys_tz.tz_minuteswest * 60);
++	work=timep%(SPD);
++	r->tm_sec=work%60; work/=60;
++	r->tm_min=work%60; r->tm_hour=work/60;
++	work=timep/(SPD);
++	r->tm_wday=(4+work)%7;
++	for (i=1970; ; ++i) {
++		register time_t k= (!(i%4) && ((i%100) || !(i%400)))?366:365;
++		if (work>k)
++			work-=k;
++		else
++			break;
++	}
++	r->tm_year=i-1900;
++	for (i=11; i && __spm[i]>work; --i) ;
++	r->tm_mon=i;
++	r->tm_mday=work-__spm[i]+1;
++}
+diff -urN linux-2.4.32.orig/net/ipv4/netfilter/Makefile linux-2.4.32/net/ipv4/netfilter/Makefile
+--- linux-2.4.32.orig/net/ipv4/netfilter/Makefile	2006-01-07 12:11:37.000000000 +0100
++++ linux-2.4.32/net/ipv4/netfilter/Makefile	2006-01-07 12:16:07.000000000 +0100
+@@ -118,6 +118,7 @@
+ obj-$(CONFIG_IP_NF_MATCH_MULTIPORT) += ipt_multiport.o
+ obj-$(CONFIG_IP_NF_MATCH_OWNER) += ipt_owner.o
+ obj-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos.o
++obj-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time.o
+ obj-$(CONFIG_IP_NF_MATCH_CONDITION) += ipt_condition.o
+ 
+ obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
+diff -urN linux-2.4.32.orig/include/linux/netfilter_ipv4/ipt_time.h linux-2.4.32/include/linux/netfilter_ipv4/ipt_time.h
+--- linux-2.4.32.orig/include/linux/netfilter_ipv4/ipt_time.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.32/include/linux/netfilter_ipv4/ipt_time.h	2006-01-07 12:16:42.000000000 +0100
+@@ -0,0 +1,15 @@
++#ifndef __ipt_time_h_included__
++#define __ipt_time_h_included__
++
++
++struct ipt_time_info {
++	u_int8_t  days_match;   /* 1 bit per day. -SMTWTFS                      */
++	u_int16_t time_start;   /* 0 < time_start < 23*60+59 = 1439             */
++	u_int16_t time_stop;    /* 0:0 < time_stat < 23:59                      */
++	u_int8_t  kerneltime;   /* ignore skb time (and use kerneltime) or not. */
++	time_t    date_start;
++	time_t    date_stop;
++};
++
++
++#endif /* __ipt_time_h_included__ */
diff --git a/target/linux/netfilter.mk b/target/linux/netfilter.mk
index f272a8548..c137a08b1 100644
--- a/target/linux/netfilter.mk
+++ b/target/linux/netfilter.mk
@@ -40,6 +40,7 @@ IPT_IPOPT-$(CONFIG_IP_NF_TARGET_MARK) += ipt_MARK
 IPT_IPOPT-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss
 IPT_IPOPT-$(CONFIG_IP_NF_TARGET_TCPMSS) += ipt_TCPMSS
 IPT_IPOPT-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos
+IPT_IPOPT-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time
 IPT_IPOPT-$(CONFIG_IP_NF_TARGET_TOS) += ipt_TOS
 IPT_IPOPT-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl
 IPT_IPOPT-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL