pom-ng-time-20060504.patch

   1  include/linux/netfilter_ipv4/ipt_time.h |   18 +++
   2  net/ipv4/netfilter/Kconfig              |   14 ++
   3  net/ipv4/netfilter/Makefile             |    1
   4  net/ipv4/netfilter/ipt_time.c           |  179 ++++++++++++++++++++++++++++++++
   5  4 files changed, 212 insertions(+)
   6
   7 diff -Nur --exclude '*.orig' linux.org/include/linux/netfilter_ipv4/ipt_time.h linux/include/linux/netfilter_ipv4/ipt_time.h
   8 --- linux.org/include/linux/netfilter_ipv4/ipt_time.h   1970-01-01 01:00:00.000000000 +0100
   9 +++ linux/include/linux/netfilter_ipv4/ipt_time.h       2006-05-04 10:29:15.000000000 +0200
  10 @@ -0,0 +1,18 @@
  11 +#ifndef __ipt_time_h_included__
  12 +#define __ipt_time_h_included__
  13 +
  14 +
  15 +struct ipt_time_info {
  16 +       u_int8_t  days_match;   /* 1 bit per day. -SMTWTFS                      */
  17 +       u_int16_t time_start;   /* 0 < time_start < 23*60+59 = 1439             */
  18 +       u_int16_t time_stop;    /* 0:0 < time_stat < 23:59                      */
  19 +
  20 +                               /* FIXME: Keep this one for userspace iptables binary compability: */
  21 +       u_int8_t  kerneltime;   /* ignore skb time (and use kerneltime) or not. */
  22 +
  23 +       time_t    date_start;
  24 +       time_t    date_stop;
  25 +};
  26 +
  27 +
  28 +#endif /* __ipt_time_h_included__ */
  29 diff -Nur --exclude '*.orig' linux.org/net/ipv4/netfilter/Kconfig linux/net/ipv4/netfilter/Kconfig
  30 --- linux.org/net/ipv4/netfilter/Kconfig        2006-05-02 23:38:44.000000000 +0200
  31 +++ linux/net/ipv4/netfilter/Kconfig    2006-05-04 10:29:15.000000000 +0200
  32 @@ -606,5 +606,19 @@
  33           Allows altering the ARP packet payload: source and destination
  34           hardware and network addresses.
  35
  36 +config IP_NF_MATCH_TIME
  37 +       tristate  'TIME match support'
  38 +       depends on IP_NF_IPTABLES
  39 +       help
  40 +         This option adds a `time' match, which allows you
  41 +         to match based on the packet arrival time/date
  42 +         (arrival time/date at the machine which netfilter is running on) or
  43 +         departure time/date (for locally generated packets).
  44 +
  45 +         If you say Y here, try iptables -m time --help for more information.
  46 +
  47 +         If you want to compile it as a module, say M here and read
  48 +         Documentation/modules.txt.  If unsure, say `N'.
  49 +
  50  endmenu
  51
  52 diff -Nur --exclude '*.orig' linux.org/net/ipv4/netfilter/Makefile linux/net/ipv4/netfilter/Makefile
  53 --- linux.org/net/ipv4/netfilter/Makefile       2006-05-02 23:38:44.000000000 +0200
  54 +++ linux/net/ipv4/netfilter/Makefile   2006-05-04 10:29:15.000000000 +0200
  55 @@ -0,0 +0,1 @@
  56 +obj-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time.o
  57 diff -Nur --exclude '*.orig' linux.org/net/ipv4/netfilter/ipt_time.c linux/net/ipv4/netfilter/ipt_time.c
  58 --- linux.org/net/ipv4/netfilter/ipt_time.c     1970-01-01 01:00:00.000000000 +0100
  59 +++ linux/net/ipv4/netfilter/ipt_time.c 2006-05-04 10:29:15.000000000 +0200
  60 @@ -0,0 +1,179 @@
  61 +/*
  62 +  This is a module which is used for time matching
  63 +  It is using some modified code from dietlibc (localtime() function)
  64 +  that you can find at http://www.fefe.de/dietlibc/
  65 +  This file is distributed under the terms of the GNU General Public
  66 +  License (GPL). Copies of the GPL can be obtained from: ftp://prep.ai.mit.edu/pub/gnu/GPL
  67 +  2001-05-04 Fabrice MARIE <fabrice@netfilter.org> : initial development.
  68 +  2001-21-05 Fabrice MARIE <fabrice@netfilter.org> : bug fix in the match code,
  69 +     thanks to "Zeng Yu" <zengy@capitel.com.cn> for bug report.
  70 +  2001-26-09 Fabrice MARIE <fabrice@netfilter.org> : force the match to be in LOCAL_IN or PRE_ROUTING only.
  71 +  2001-30-11 Fabrice : added the possibility to use the match in FORWARD/OUTPUT with a little hack,
  72 +     added Nguyen Dang Phuoc Dong <dongnd@tlnet.com.vn> patch to support timezones.
  73 +  2004-05-02 Fabrice : added support for date matching, from an idea of Fabien COELHO.
  74 +*/
  75 +
  76 +#include <linux/module.h>
  77 +#include <linux/skbuff.h>
  78 +#include <linux/netfilter_ipv4/ip_tables.h>
  79 +#include <linux/netfilter_ipv4/ipt_time.h>
  80 +#include <linux/time.h>
  81 +
  82 +MODULE_AUTHOR("Fabrice MARIE <fabrice@netfilter.org>");
  83 +MODULE_DESCRIPTION("Match arrival timestamp/date");
  84 +MODULE_LICENSE("GPL");
  85 +
  86 +struct tm
  87 +{
  88 +       int tm_sec;                   /* Seconds.     [0-60] (1 leap second) */
  89 +       int tm_min;                   /* Minutes.     [0-59] */
  90 +       int tm_hour;                  /* Hours.       [0-23] */
  91 +       int tm_mday;                  /* Day.         [1-31] */
  92 +       int tm_mon;                   /* Month.       [0-11] */
  93 +       int tm_year;                  /* Year - 1900.  */
  94 +       int tm_wday;                  /* Day of week. [0-6] */
  95 +       int tm_yday;                  /* Days in year.[0-365] */
  96 +       int tm_isdst;                 /* DST.         [-1/0/1]*/
  97 +
  98 +       long int tm_gmtoff;           /* we don't care, we count from GMT */
  99 +       const char *tm_zone;          /* we don't care, we count from GMT */
 100 +};
 101 +
 102 +void
 103 +localtime(const u32 time, struct tm *r);
 104 +
 105 +static int
 106 +match(const struct sk_buff *skb,
 107 +      const struct net_device *in,
 108 +      const struct net_device *out,
 109 +      const void *matchinfo,
 110 +      int offset,
 111 +      unsigned int protoff,
 112 +      int *hotdrop)
 113 +{
 114 +       const struct ipt_time_info *info = matchinfo;   /* match info for rule */
 115 +       struct tm currenttime;                          /* time human readable */
 116 +       u_int8_t days_of_week[7] = {64, 32, 16, 8, 4, 2, 1};
 117 +       u_int16_t packet_time;
 118 +
 119 +       /* We might not have a timestamp, get one */
 120 +       if (skb->tstamp.off_sec == 0)
 121 +               __net_timestamp((struct sk_buff *)skb);
 122 +
 123 +       /* First we make sure we are in the date start-stop boundaries */
 124 +       if ((skb->tstamp.off_sec < info->date_start) || (skb->tstamp.off_sec > info->date_stop))
 125 +               return 0; /* We are outside the date boundaries */
 126 +
 127 +       /* Transform the timestamp of the packet, in a human readable form */
 128 +       localtime(skb->tstamp.off_sec, &currenttime);
 129 +
 130 +       /* check if we match this timestamp, we start by the days... */
 131 +       if ((days_of_week[currenttime.tm_wday] & info->days_match) != days_of_week[currenttime.tm_wday])
 132 +               return 0; /* the day doesn't match */
 133 +
 134 +       /* ... check the time now */
 135 +       packet_time = (currenttime.tm_hour * 60) + currenttime.tm_min;
 136 +       if ((packet_time < info->time_start) || (packet_time > info->time_stop))
 137 +               return 0;
 138 +
 139 +       /* here we match ! */
 140 +       return 1;
 141 +}
 142 +
 143 +static int
 144 +checkentry(const char *tablename,
 145 +           const struct ipt_ip *ip,
 146 +           void *matchinfo,
 147 +           unsigned int matchsize,
 148 +           unsigned int hook_mask)
 149 +{
 150 +       struct ipt_time_info *info = matchinfo;   /* match info for rule */
 151 +
 152 +       /* First, check that we are in the correct hooks */
 153 +       if (hook_mask
 154 +            & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD) | (1 << NF_IP_LOCAL_OUT)))
 155 +       {
 156 +               printk("ipt_time: error, only valid for PRE_ROUTING, LOCAL_IN, FORWARD and OUTPUT)\n");
 157 +               return 0;
 158 +       }
 159 +
 160 +       /* Check the size */
 161 +       if (matchsize != IPT_ALIGN(sizeof(struct ipt_time_info)))
 162 +               return 0;
 163 +       /* Now check the coherence of the data ... */
 164 +       if ((info->time_start > 1439) ||        /* 23*60+59 = 1439*/
 165 +           (info->time_stop  > 1439))
 166 +       {
 167 +               printk(KERN_WARNING "ipt_time: invalid argument\n");
 168 +               return 0;
 169 +       }
 170 +
 171 +       return 1;
 172 +}
 173 +
 174 +static struct ipt_match time_match = {
 175 +       .name = "time",
 176 +       .match = &match,
 177 +       .checkentry = &checkentry,
 178 +       .me = THIS_MODULE
 179 +};
 180 +
 181 +static int __init init(void)
 182 +{
 183 +       printk("ipt_time loading\n");
 184 +       return ipt_register_match(&time_match);
 185 +}
 186 +
 187 +static void __exit fini(void)
 188 +{
 189 +       ipt_unregister_match(&time_match);
 190 +       printk("ipt_time unloaded\n");
 191 +}
 192 +
 193 +module_init(init);
 194 +module_exit(fini);
 195 +
 196 +
 197 +/* The part below is borowed and modified from dietlibc */
 198 +
 199 +/* seconds per day */
 200 +#define SPD 24*60*60
 201 +
 202 +void
 203 +localtime(const u32 time, struct tm *r) {
 204 +       u32 i, timep;
 205 +       extern struct timezone sys_tz;
 206 +       const unsigned int __spm[12] =
 207 +               { 0,
 208 +                 (31),
 209 +                 (31+28),
 210 +                 (31+28+31),
 211 +                 (31+28+31+30),
 212 +                 (31+28+31+30+31),
 213 +                 (31+28+31+30+31+30),
 214 +                 (31+28+31+30+31+30+31),
 215 +                 (31+28+31+30+31+30+31+31),
 216 +                 (31+28+31+30+31+30+31+31+30),
 217 +                 (31+28+31+30+31+30+31+31+30+31),
 218 +                 (31+28+31+30+31+30+31+31+30+31+30),
 219 +               };
 220 +       register u32 work;
 221 +
 222 +       timep = time - (sys_tz.tz_minuteswest * 60);
 223 +       work=timep%(SPD);
 224 +       r->tm_sec=work%60; work/=60;
 225 +       r->tm_min=work%60; r->tm_hour=work/60;
 226 +       work=timep/(SPD);
 227 +       r->tm_wday=(4+work)%7;
 228 +       for (i=1970; ; ++i) {
 229 +               register time_t k= (!(i%4) && ((i%100) || !(i%400)))?366:365;
 230 +               if (work>k)
 231 +                       work-=k;
 232 +               else
 233 +                       break;
 234 +       }
 235 +       r->tm_year=i-1900;
 236 +       for (i=11; i && __spm[i]>work; --i) ;
 237 +       r->tm_mon=i;
 238 +       r->tm_mday=work-__spm[i]+1;
 239 +}