openwrt/target/linux/generic-2.4/patches/612-netfilter_quota.patch

   1 diff -ruN linux-2.4.30-old/Documentation/Configure.help linux-2.4.30-new/Documentation/Configure.help
   2 --- linux-2.4.30-old/Documentation/Configure.help       2005-11-13 22:30:42.000000000 +0100
   3 +++ linux-2.4.30-new/Documentation/Configure.help       2005-11-13 22:31:17.000000000 +0100
   4 @@ -2888,6 +2888,13 @@
   5    If you want to compile it as a module, say M here and read
   6    <file:Documentation/modules.txt>.  If unsure, say `N'.
   7
   8 +quota match support
   9 +CONFIG_IP_NF_MATCH_QUOTA
  10 +  This match implements network quotas.
  11 +
  12 +  If you want to compile it as a module, say M here and read
  13 +  Documentation/modules.txt.  If unsure, say `N'.
  14 +
  15  skb->pkt_type packet match support
  16  CONFIG_IP_NF_MATCH_PKTTYPE
  17    This patch allows you to match packet in accrodance
  18 diff -ruN linux-2.4.30-old/include/linux/netfilter_ipv4/ipt_quota.h linux-2.4.30-new/include/linux/netfilter_ipv4/ipt_quota.h
  19 --- linux-2.4.30-old/include/linux/netfilter_ipv4/ipt_quota.h   1970-01-01 01:00:00.000000000 +0100
  20 +++ linux-2.4.30-new/include/linux/netfilter_ipv4/ipt_quota.h   2005-11-13 22:31:17.000000000 +0100
  21 @@ -0,0 +1,12 @@
  22 +#ifndef _IPT_QUOTA_H
  23 +#define _IPT_QUOTA_H
  24 +
  25 +/* print debug info in both kernel/netfilter module & iptable library */
  26 +//#define DEBUG_IPT_QUOTA
  27 +
  28 +struct ipt_quota_info {
  29 +        u_int64_t quota;
  30 +       struct ipt_quota_info *master;
  31 +};
  32 +
  33 +#endif /*_IPT_QUOTA_H*/
  34 diff -ruN linux-2.4.30-old/net/ipv4/netfilter/Config.in linux-2.4.30-new/net/ipv4/netfilter/Config.in
  35 --- linux-2.4.30-old/net/ipv4/netfilter/Config.in       2005-11-13 22:30:42.000000000 +0100
  36 +++ linux-2.4.30-new/net/ipv4/netfilter/Config.in       2005-11-13 22:31:17.000000000 +0100
  37 @@ -24,6 +24,7 @@
  38  if [ "$CONFIG_IP_NF_IPTABLES" != "n" ]; then
  39  # The simple matches.
  40    dep_tristate '  limit match support' CONFIG_IP_NF_MATCH_LIMIT $CONFIG_IP_NF_IPTABLES
  41 +  dep_tristate '  quota match support' CONFIG_IP_NF_MATCH_QUOTA $CONFIG_IP_NF_IPTABLES
  42
  43    dep_tristate '  IP set support' CONFIG_IP_NF_SET $CONFIG_IP_NF_IPTABLES
  44    if [ "$CONFIG_IP_NF_SET" != "n" ]; then
  45 diff -ruN linux-2.4.30-old/net/ipv4/netfilter/Makefile linux-2.4.30-new/net/ipv4/netfilter/Makefile
  46 --- linux-2.4.30-old/net/ipv4/netfilter/Makefile        2005-11-13 22:30:42.000000000 +0100
  47 +++ linux-2.4.30-new/net/ipv4/netfilter/Makefile        2005-11-13 22:31:17.000000000 +0100
  48 @@ -74,6 +74,7 @@
  49  # matches
  50  obj-$(CONFIG_IP_NF_MATCH_HELPER) += ipt_helper.o
  51  obj-$(CONFIG_IP_NF_MATCH_LIMIT) += ipt_limit.o
  52 +obj-$(CONFIG_IP_NF_MATCH_QUOTA) += ipt_quota.o
  53  obj-$(CONFIG_IP_NF_MATCH_MARK) += ipt_mark.o
  54  obj-$(CONFIG_IP_NF_MATCH_SET) += ipt_set.o
  55  obj-$(CONFIG_IP_NF_TARGET_SET) += ipt_SET.o
  56 diff -ruN linux-2.4.30-old/net/ipv4/netfilter/ipt_quota.c linux-2.4.30-new/net/ipv4/netfilter/ipt_quota.c
  57 --- linux-2.4.30-old/net/ipv4/netfilter/ipt_quota.c     1970-01-01 01:00:00.000000000 +0100
  58 +++ linux-2.4.30-new/net/ipv4/netfilter/ipt_quota.c     2005-11-13 22:31:17.000000000 +0100
  59 @@ -0,0 +1,88 @@
  60 +/*
  61 + * netfilter module to enforce network quotas
  62 + *
  63 + * Sam Johnston <samj@samj.net>
  64 + *
  65 + * 30/01/05: Fixed on SMP --Pablo Neira <pablo@eurodev.net>
  66 + */
  67 +#include <linux/module.h>
  68 +#include <linux/skbuff.h>
  69 +#include <linux/spinlock.h>
  70 +#include <linux/interrupt.h>
  71 +
  72 +#include <linux/netfilter_ipv4/ip_tables.h>
  73 +#include <linux/netfilter_ipv4/ipt_quota.h>
  74 +
  75 +MODULE_LICENSE("GPL");
  76 +
  77 +static spinlock_t quota_lock = SPIN_LOCK_UNLOCKED;
  78 +
  79 +static int
  80 +match(const struct sk_buff *skb,
  81 +      const struct net_device *in,
  82 +      const struct net_device *out,
  83 +      const void *matchinfo,
  84 +      int offset, const void *hdr, u_int16_t datalen, int *hotdrop)
  85 +{
  86 +       struct ipt_quota_info *q =
  87 +               ((struct ipt_quota_info *) matchinfo)->master;
  88 +
  89 +        spin_lock_bh(&quota_lock);
  90 +
  91 +        if (q->quota >= datalen) {
  92 +                /* we can afford this one */
  93 +                q->quota -= datalen;
  94 +                spin_unlock_bh(&quota_lock);
  95 +
  96 +#ifdef DEBUG_IPT_QUOTA
  97 +                printk("IPT Quota OK: %llu datlen %d \n", q->quota, datalen);
  98 +#endif
  99 +                return 1;
 100 +        }
 101 +
 102 +        /* so we do not allow even small packets from now on */
 103 +        q->quota = 0;
 104 +
 105 +#ifdef DEBUG_IPT_QUOTA
 106 +        printk("IPT Quota Failed: %llu datlen %d \n", q->quota, datalen);
 107 +#endif
 108 +
 109 +        spin_unlock_bh(&quota_lock);
 110 +        return 0;
 111 +}
 112 +
 113 +static int
 114 +checkentry(const char *tablename,
 115 +           const struct ipt_ip *ip,
 116 +           void *matchinfo, unsigned int matchsize, unsigned int hook_mask)
 117 +{
 118 +        /* TODO: spinlocks? sanity checks? */
 119 +       struct ipt_quota_info *q = (struct ipt_quota_info *) matchinfo;
 120 +
 121 +        if (matchsize != IPT_ALIGN(sizeof (struct ipt_quota_info)))
 122 +                return 0;
 123 +
 124 +       /* For SMP, we only want to use one set of counters. */
 125 +       q->master = q;
 126 +
 127 +        return 1;
 128 +}
 129 +
 130 +static struct ipt_match quota_match
 131 +    = { {NULL, NULL}, "quota", &match, &checkentry, NULL, THIS_MODULE };
 132 +
 133 +static int __init
 134 +init(void)
 135 +{
 136 +        return ipt_register_match(&quota_match);
 137 +}
 138 +
 139 +static void __exit
 140 +fini(void)
 141 +{
 142 +        ipt_unregister_match(&quota_match);
 143 +}
 144 +
 145 +module_init(init);
 146 +module_exit(fini);
 147 +