target/linux/generic-2.4/patches/619-netfilter_classify.patch

   1 --- /dev/null
   2 +++ b/include/linux/netfilter_ipv4/ipt_CLASSIFY.h
   3 @@ -0,0 +1,8 @@
   4 +#ifndef _IPT_CLASSIFY_H
   5 +#define _IPT_CLASSIFY_H
   6 +
   7 +struct ipt_classify_target_info {
   8 +       u_int32_t priority;
   9 +};
  10 +
  11 +#endif /*_IPT_CLASSIFY_H */
  12 --- a/net/ipv4/netfilter/Config.in
  13 +++ b/net/ipv4/netfilter/Config.in
  14 @@ -171,6 +171,7 @@ if [ "$CONFIG_IP_NF_IPTABLES" != "n" ];
  15      dep_tristate '    DSCP target support' CONFIG_IP_NF_TARGET_DSCP $CONFIG_IP_NF_MANGLE
  16
  17      dep_tristate '    MARK target support' CONFIG_IP_NF_TARGET_MARK $CONFIG_IP_NF_MANGLE
  18 +    dep_tristate '    CLASSIFY target support (EXPERIMENTAL)' CONFIG_IP_NF_TARGET_CLASSIFY $CONFIG_IP_NF_MANGLE
  19      dep_tristate '    IMQ target support' CONFIG_IP_NF_TARGET_IMQ $CONFIG_IP_NF_MANGLE
  20    fi
  21    if [ "$CONFIG_IP_NF_CONNTRACK_MARK" != "n" ]; then
  22 --- /dev/null
  23 +++ b/net/ipv4/netfilter/ipt_CLASSIFY.c
  24 @@ -0,0 +1,82 @@
  25 +/*
  26 + * This is a module which is used for setting the skb->priority field
  27 + * of an skb for qdisc classification.
  28 + */
  29 +
  30 +#include <linux/module.h>
  31 +#include <linux/skbuff.h>
  32 +#include <linux/ip.h>
  33 +#include <net/checksum.h>
  34 +
  35 +#include <linux/netfilter_ipv4/ip_tables.h>
  36 +#include <linux/netfilter_ipv4/ipt_CLASSIFY.h>
  37 +
  38 +MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
  39 +MODULE_LICENSE("GPL");
  40 +MODULE_DESCRIPTION("iptables qdisc classification target module");
  41 +
  42 +static unsigned int
  43 +target(struct sk_buff **pskb,
  44 +       unsigned int hooknum,
  45 +       const struct net_device *in,
  46 +       const struct net_device *out,
  47 +       const void *targinfo,
  48 +       void *userinfo)
  49 +{
  50 +       const struct ipt_classify_target_info *clinfo = targinfo;
  51 +
  52 +       if((*pskb)->priority != clinfo->priority) {
  53 +               (*pskb)->priority = clinfo->priority;
  54 +               (*pskb)->nfcache |= NFC_ALTERED;
  55 +       }
  56 +
  57 +       return IPT_CONTINUE;
  58 +}
  59 +
  60 +static int
  61 +checkentry(const char *tablename,
  62 +           const struct ipt_entry *e,
  63 +           void *targinfo,
  64 +           unsigned int targinfosize,
  65 +           unsigned int hook_mask)
  66 +{
  67 +       if (targinfosize != IPT_ALIGN(sizeof(struct ipt_classify_target_info))){
  68 +               printk(KERN_ERR "CLASSIFY: invalid size (%u != %u).\n",
  69 +                      targinfosize,
  70 +                      IPT_ALIGN(sizeof(struct ipt_classify_target_info)));
  71 +               return 0;
  72 +       }
  73 +
  74 +       if (hook_mask & ~(1 << NF_IP_POST_ROUTING)) {
  75 +               printk(KERN_ERR "CLASSIFY: only valid in POST_ROUTING.\n");
  76 +               return 0;
  77 +       }
  78 +
  79 +       if (strcmp(tablename, "mangle") != 0) {
  80 +               printk(KERN_WARNING "CLASSIFY: can only be called from "
  81 +                                   "\"mangle\" table, not \"%s\".\n",
  82 +                                   tablename);
  83 +               return 0;
  84 +       }
  85 +
  86 +       return 1;
  87 +}
  88 +
  89 +static struct ipt_target ipt_classify_reg
  90 += { { NULL, NULL }, "CLASSIFY", target, checkentry, NULL, THIS_MODULE };
  91 +
  92 +static int __init init(void)
  93 +{
  94 +       if (ipt_register_target(&ipt_classify_reg))
  95 +               return -EINVAL;
  96 +
  97 +       return 0;
  98 +}
  99 +
 100 +static void __exit fini(void)
 101 +{
 102 +       ipt_unregister_target(&ipt_classify_reg);
 103 +}
 104 +
 105 +module_init(init);
 106 +module_exit(fini);
 107 --- a/net/ipv4/netfilter/Makefile
 108 +++ b/net/ipv4/netfilter/Makefile
 109 @@ -133,6 +133,7 @@ obj-$(CONFIG_IP_NF_MATCH_LAYER7) += ipt_
 110
 111  # targets
 112  obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
 113 +obj-$(CONFIG_IP_NF_TARGET_CLASSIFY) += ipt_CLASSIFY.o
 114  obj-$(CONFIG_IP_NF_TARGET_MIRROR) += ipt_MIRROR.o
 115  obj-$(CONFIG_IP_NF_TARGET_TOS) += ipt_TOS.o
 116  obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o