imported original firmware WRT54GL_v4.30.11_11_US

1 files changed, 187 insertions, 0 deletions

diff --git a/release/src/linux/linux/net/ipv4/netfilter/ipt_time.c b/release/src/linux/linux/net/ipv4/netfilter/ipt_time.c
new file mode 100644
index 00000000..216098fc
--- /dev/null
+++ b/release/src/linux/linux/net/ipv4/netfilter/ipt_time.c
@@ -0,0 +1,187 @@
+/*
+  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.
+*/
+
+#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");
+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 */
+	unsigned int 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;
+
+	/* Transform the timestamp of the packet, in a human readable form */
+	localtime(&packet_local_time, &currenttime);
+
+	/* check if we match this timestamp, we start by the days... */
+	if (!((1 << currenttime.tm_wday) & info->days_match))
+		return 0; /* the day doesn't match */
+
+	/* ... check the time now */
+	packet_time = (currenttime.tm_hour * 60 * 60) + (currenttime.tm_min * 60) + currenttime.tm_sec;
+	if (info->time_start < info->time_stop) {
+		if ((packet_time < info->time_start) || (packet_time > info->time_stop))
+			return 0;
+	} else {
+		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 hook */
+	/* PRE_ROUTING, LOCAL_IN or FROWARD */
+	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;
+	}
+
+	/* always use kerneltime */
+	info->kerneltime = 1;
+
+	/* 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 > 86399) ||        /* 24*60*60-1 = 86399*/
+	    (info->time_stop  > 86399))
+	{
+		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;
+}