+++ /dev/null
---- /dev/null
-+++ b/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__ */
---- /dev/null
-+++ b/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, ¤ttime);
-+
-+ /* 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_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;
-+ }
-+
-+ /* 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;
-+}
---- a/net/ipv4/netfilter/Kconfig
-+++ b/net/ipv4/netfilter/Kconfig
-@@ -72,6 +72,22 @@ config IP_NF_MATCH_TOS
-
- 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
---- a/net/ipv4/netfilter/Makefile
-+++ b/net/ipv4/netfilter/Makefile
-@@ -50,6 +50,7 @@ obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_
- obj-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos.o
- obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
- obj-$(CONFIG_IP_NF_MATCH_SET) += ipt_set.o
-+obj-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time.o
-
- # targets
- obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
projects / openwrt / svn-archive / archive.git / blobdiff