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openwrt/target/linux/generic-2.6/patches-2.6.25/140-netfilter_time.patch

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Index: linux-2.6.25.1/include/linux/netfilter_ipv4/ipt_time.h
===================================================================
--- /dev/null
+++ linux-2.6.25.1/include/linux/netfilter_ipv4/ipt_time.h
@@ -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__ */
Index: linux-2.6.25.1/net/ipv4/netfilter/ipt_time.c
===================================================================
--- /dev/null
+++ linux-2.6.25.1/net/ipv4/netfilter/ipt_time.c
@@ -0,0 +1,180 @@
+/*
+ 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 bool
+match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const struct xt_match *match,
+ const void *matchinfo,
+ int offset,
+ unsigned int protoff,
+ bool *hotdrop)
+{
+ const struct ipt_time_info *info = matchinfo; /* match info for rule */
+ struct timeval tv;
+ 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.tv64 == 0)
+ __net_timestamp((struct sk_buff *)skb);
+
+ skb_get_timestamp(skb, &tv);
+ /* First we make sure we are in the date start-stop boundaries */
+ if ((tv.tv_sec < info->date_start) || (tv.tv_sec > info->date_stop))
+ return 0; /* We are outside the date boundaries */
+
+ /* Transform the timestamp of the packet, in a human readable form */
+ localtime(tv.tv_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 bool
+checkentry(const char *tablename,
+ const void *ip,
+ const struct xt_match *match,
+ void *matchinfo,
+ 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_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD) | (1 << NF_INET_LOCAL_OUT)))
+ {
+ printk("ipt_time: error, only valid for PRE_ROUTING, LOCAL_IN, FORWARD and OUTPUT)\n");
+ 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,
+ .matchsize = sizeof(struct ipt_time_info),
+ .checkentry = &checkentry,
+ .me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+ printk("ipt_time loading\n");
+ return xt_register_match(&time_match);
+}
+
+static void __exit fini(void)
+{
+ xt_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;
+}
Index: linux-2.6.25.1/net/ipv4/netfilter/Kconfig
===================================================================
--- linux-2.6.25.1.orig/net/ipv4/netfilter/Kconfig
+++ linux-2.6.25.1/net/ipv4/netfilter/Kconfig
@@ -63,6 +63,22 @@ config IP_NF_MATCH_IPP2P
help
Module for matching traffic of various Peer-to-Peer applications
+
+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
Index: linux-2.6.25.1/net/ipv4/netfilter/Makefile
===================================================================
--- linux-2.6.25.1.orig/net/ipv4/netfilter/Makefile
+++ linux-2.6.25.1/net/ipv4/netfilter/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn
obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
obj-$(CONFIG_IP_NF_MATCH_SET) += ipt_set.o
+obj-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time.o
obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
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