diff -urN linux-2.6.19.old/include/linux/netfilter_ipv4/ipt_time.h linux-2.6.19.dev/include/linux/netfilter_ipv4/ipt_time.h --- linux-2.6.19.old/include/linux/netfilter_ipv4/ipt_time.h 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.19.dev/include/linux/netfilter_ipv4/ipt_time.h 2006-12-14 03:13:45.000000000 +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__ */ diff -urN linux-2.6.19.old/net/ipv4/netfilter/ipt_time.c linux-2.6.19.dev/net/ipv4/netfilter/ipt_time.c --- linux-2.6.19.old/net/ipv4/netfilter/ipt_time.c 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.19.dev/net/ipv4/netfilter/ipt_time.c 2006-12-14 03:13:45.000000000 +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 : initial development. + 2001-21-05 Fabrice MARIE : bug fix in the match code, + thanks to "Zeng Yu" for bug report. + 2001-26-09 Fabrice MARIE : 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 patch to support timezones. + 2004-05-02 Fabrice : added support for date matching, from an idea of Fabien COELHO. +*/ + +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Fabrice MARIE "); +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 struct xt_match *match, + const void *matchinfo, + int offset, + unsigned int protoff, + 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, ¤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 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 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-2.6.19.old/net/ipv4/netfilter/Kconfig linux-2.6.19.dev/net/ipv4/netfilter/Kconfig --- linux-2.6.19.old/net/ipv4/netfilter/Kconfig 2006-12-14 03:13:45.000000000 +0100 +++ linux-2.6.19.dev/net/ipv4/netfilter/Kconfig 2006-12-14 03:13:45.000000000 +0100 @@ -263,6 +263,22 @@ 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-2.6.19.old/net/ipv4/netfilter/Makefile linux-2.6.19.dev/net/ipv4/netfilter/Makefile --- linux-2.6.19.old/net/ipv4/netfilter/Makefile 2006-12-14 03:13:45.000000000 +0100 +++ linux-2.6.19.dev/net/ipv4/netfilter/Makefile 2006-12-14 03:13:45.000000000 +0100 @@ -58,6 +58,7 @@ obj-$(CONFIG_IP_NF_MATCH_IPRANGE) += ipt_iprange.o obj-$(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_AH) += ipt_ah.o