tags 310583 + patch
thanks
hi,
attached an updated diff which should cleanly apply against
kernel-source-2.4.27. I didnt test compile nor its functionality.
bye,
- michael
diff -ruN kernel-source-2.4.27/Documentation/Configure.help
kernel-source-2.4.27-time/Documentation/Configure.help
--- kernel-source-2.4.27/Documentation/Configure.help 2005-01-19
10:57:51.000000000 +0100
+++ kernel-source-2.4.27-time/Documentation/Configure.help 2005-05-27
10:37:46.000000000 +0200
@@ -2938,6 +2938,18 @@
If you want to compile it as a module, say M here and read
<file:Documentation/modules.txt>. If unsure, say `N'.
+TIME patch support
+CONFIG_IP_NF_MATCH_TIME
+ 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'.
+
AH/ESP match support
CONFIG_IP_NF_MATCH_AH_ESP
These two match extensions (`ah' and `esp') allow you to match a
diff -ruN kernel-source-2.4.27/include/linux/netfilter_ipv4/ipt_time.h
kernel-source-2.4.27-time/include/linux/netfilter_ipv4/ipt_time.h
--- kernel-source-2.4.27/include/linux/netfilter_ipv4/ipt_time.h
1970-01-01 01:00:00.000000000 +0100
+++ kernel-source-2.4.27-time/include/linux/netfilter_ipv4/ipt_time.h
2005-05-27 10:37:45.000000000 +0200
@@ -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 -ruN kernel-source-2.4.27/net/ipv4/netfilter/Config.in
kernel-source-2.4.27-time/net/ipv4/netfilter/Config.in
--- kernel-source-2.4.27/net/ipv4/netfilter/Config.in 2003-08-25
13:44:44.000000000 +0200
+++ kernel-source-2.4.27-time/net/ipv4/netfilter/Config.in 2005-05-27
10:37:46.000000000 +0200
@@ -24,6 +24,7 @@
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 ' recent match support' CONFIG_IP_NF_MATCH_RECENT
$CONFIG_IP_NF_IPTABLES
dep_tristate ' ECN match support' CONFIG_IP_NF_MATCH_ECN
$CONFIG_IP_NF_IPTABLES
diff -ruN kernel-source-2.4.27/net/ipv4/netfilter/Makefile
kernel-source-2.4.27-time/net/ipv4/netfilter/Makefile
--- kernel-source-2.4.27/net/ipv4/netfilter/Makefile 2003-08-25
13:44:44.000000000 +0200
+++ kernel-source-2.4.27-time/net/ipv4/netfilter/Makefile 2005-05-27
10:37:46.000000000 +0200
@@ -73,6 +73,9 @@
obj-$(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
diff -ruN kernel-source-2.4.27/net/ipv4/netfilter/ipt_time.c
kernel-source-2.4.27-time/net/ipv4/netfilter/ipt_time.c
--- kernel-source-2.4.27/net/ipv4/netfilter/ipt_time.c 1970-01-01
01:00:00.000000000 +0100
+++ kernel-source-2.4.27-time/net/ipv4/netfilter/ipt_time.c 2005-05-27
10:37:45.000000000 +0200
@@ -0,0 +1,189 @@
+/*
+ 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 <[EMAIL PROTECTED]> : initial development.
+ 2001-21-05 Fabrice MARIE <[EMAIL PROTECTED]> : bug fix in the match code,
+ thanks to "Zeng Yu" <[EMAIL PROTECTED]> for bug report.
+ 2001-26-09 Fabrice MARIE <[EMAIL PROTECTED]> : 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 <[EMAIL PROTECTED]> 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 <[EMAIL PROTECTED]>");
+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, ¤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 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
+= { { NULL, NULL }, "time", &match, &checkentry, NULL, 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;
+}
