Merged ipt_time to 2.6 kernel and added ipt_time for all 2.4 archs, closes #185

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2855 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 243 insertions, 0 deletions

diff --git a/target/linux/linux-2.6/config/brcm b/target/linux/linux-2.6/config/brcm
index ce357752e..fc4234343 100644
--- a/target/linux/linux-2.6/config/brcm
+++ b/target/linux/linux-2.6/config/brcm
@@ -336,6 +336,7 @@ 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_RECENT=m
 CONFIG_IP_NF_MATCH_ECN=m
 CONFIG_IP_NF_MATCH_DSCP=m
diff --git a/target/linux/linux-2.6/config/x86 b/target/linux/linux-2.6/config/x86
index 8cb65cc73..872232dff 100644
--- a/target/linux/linux-2.6/config/x86
+++ b/target/linux/linux-2.6/config/x86
@@ -357,6 +357,7 @@ 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_RECENT=m
 CONFIG_IP_NF_MATCH_ECN=m
 CONFIG_IP_NF_MATCH_DSCP=m
diff --git a/target/linux/linux-2.6/patches/generic/105-netfilter_time.patch b/target/linux/linux-2.6/patches/generic/105-netfilter_time.patch
new file mode 100644
index 000000000..34257ee93
--- /dev/null
+++ b/target/linux/linux-2.6/patches/generic/105-netfilter_time.patch
@@ -0,0 +1,241 @@
+diff -urN linux-2.6.15-rc6.orig/net/ipv4/netfilter/ipt_time.c linux-2.6.15-rc6/net/ipv4/netfilter/ipt_time.c
+--- linux-2.6.15-rc6.orig/net/ipv4/netfilter/ipt_time.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.15-rc6/net/ipv4/netfilter/ipt_time.c	2006-01-07 13:02:59.000000000 +0100
+@@ -0,0 +1,178 @@
++/*
++  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 u32 time, 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,
++      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;
++
++	/* We might not have a timestamp, get one */
++	if (skb->tstamp.off_sec == 0)
++		__net_timestamp((struct sk_buff *)skb);
++
++	/* First we make sure we are in the date start-stop boundaries */
++	if ((skb->tstamp.off_sec < info->date_start) || (skb->tstamp.off_sec > info->date_stop))
++		return 0; /* We are outside the date boundaries */
++
++	/* Transform the timestamp of the packet, in a human readable form */
++	localtime(skb->tstamp.off_sec, &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;
++	}
++
++	/* 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 u32 time, struct tm *r) {
++	u32 i, 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 u32 work;
++
++	timep = time - (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-2.6.15-rc6.orig/net/ipv4/netfilter/Kconfig linux-2.6.15-rc6/net/ipv4/netfilter/Kconfig
+--- linux-2.6.15-rc6.orig/net/ipv4/netfilter/Kconfig	2006-01-07 13:00:21.000000000 +0100
++++ linux-2.6.15-rc6/net/ipv4/netfilter/Kconfig	2006-01-07 13:05:07.000000000 +0100
+@@ -278,6 +278,22 @@
+ 
+ 	  To compile it as a module, choose M here.  If unsure, say N.
+ 
++	  
++config IP_NF_MATCH_TIME
++	tristate  'TIME match support'
++	depends on IP_NF_IPTABLES
++	help
++	  This option adds a `time' match, which allows you
++	  to match based on the packet arrival time/date
++	  (arrival time/date at the machine which netfilter is running on) or
++	  departure time/date (for locally generated packets).
++	  
++	  If you say Y here, try iptables -m time --help for more information.
++	  If you want to compile it as a module, say M here and read
++	  
++	  Documentation/modules.txt.  If unsure, say `N'.
++
++
+ config IP_NF_MATCH_RECENT
+ 	tristate "recent match support"
+ 	depends on IP_NF_IPTABLES
+diff -urN linux-2.6.15-rc6.orig/net/ipv4/netfilter/Makefile linux-2.6.15-rc6/net/ipv4/netfilter/Makefile
+--- linux-2.6.15-rc6.orig/net/ipv4/netfilter/Makefile	2006-01-07 13:00:21.000000000 +0100
++++ linux-2.6.15-rc6/net/ipv4/netfilter/Makefile	2006-01-07 13:03:50.000000000 +0100
+@@ -58,6 +58,7 @@
+ 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-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
+ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
+ obj-$(CONFIG_IP_NF_MATCH_DSCP) += ipt_dscp.o
+diff -urN linux-2.6.15-rc6.orig/include/linux/netfilter_ipv4/ipt_time.h linux-2.6.15-rc6/include/linux/netfilter_ipv4/ipt_time.h
+--- linux-2.6.15-rc6.orig/include/linux/netfilter_ipv4/ipt_time.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.15-rc6/include/linux/netfilter_ipv4/ipt_time.h	2006-01-07 13:02:14.000000000 +0100
+@@ -0,0 +1,18 @@
++#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                      */
++
++				/* FIXME: Keep this one for userspace iptables binary compability: */
++	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__ */