This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / net / ipv4 / netfilter / ipt_SET.c

diff --git a/net/ipv4/netfilter/ipt_SET.c b/net/ipv4/netfilter/ipt_SET.c
new file mode 100644 (file)
index 0000000..37e18ec
--- /dev/null
+++ b/net/ipv4/netfilter/ipt_SET.c
@@ -0,0 +1,128 @@
+/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
+ *                         Patrick Schaaf <bof@bof.de>
+ *                         Martin Josefsson <gandalf@wlug.westbo.se>
+ * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.  
+ */
+
+/* ipt_SET.c - netfilter target to manipulate IP sets */
+
+#include <linux/types.h>
+#include <linux/ip.h>
+#include <linux/timer.h>
+#include <linux/module.h>
+#include <linux/netfilter.h>
+#include <linux/netdevice.h>
+#include <linux/if.h>
+#include <linux/inetdevice.h>
+#include <net/protocol.h>
+#include <net/checksum.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv4/ip_nat_rule.h>
+#include <linux/netfilter_ipv4/ipt_set.h>
+
+static unsigned int
+target(struct sk_buff **pskb,
+       const struct net_device *in,
+       const struct net_device *out,
+       unsigned int hooknum,
+       const void *targinfo,
+       void *userinfo)
+{
+       const struct ipt_set_info_target *info = targinfo;
+       
+       if (info->add_set.index != IP_SET_INVALID_ID)
+               ip_set_addip_kernel(info->add_set.index,
+                                   *pskb,
+                                   info->add_set.flags);
+       if (info->del_set.index != IP_SET_INVALID_ID)
+               ip_set_delip_kernel(info->del_set.index,
+                                   *pskb,
+                                   info->del_set.flags);
+
+       return IPT_CONTINUE;
+}
+
+static int
+checkentry(const char *tablename,
+          const struct ipt_entry *e,
+          void *targinfo,
+          unsigned int targinfosize, unsigned int hook_mask)
+{
+       struct ipt_set_info_target *info = 
+               (struct ipt_set_info_target *) targinfo;
+       ip_set_id_t index;
+
+       if (targinfosize != IPT_ALIGN(sizeof(*info))) {
+               DP("bad target info size %u", targinfosize);
+               return 0;
+       }
+
+       if (info->add_set.index != IP_SET_INVALID_ID) {
+               index = ip_set_get_byindex(info->add_set.index);
+               if (index == IP_SET_INVALID_ID) {
+                       ip_set_printk("cannot find add_set index %u as target",
+                                     info->add_set.index);
+                       return 0;       /* error */
+               }
+       }
+
+       if (info->del_set.index != IP_SET_INVALID_ID) {
+               index = ip_set_get_byindex(info->del_set.index);
+               if (index == IP_SET_INVALID_ID) {
+                       ip_set_printk("cannot find del_set index %u as target",
+                                     info->del_set.index);
+                       return 0;       /* error */
+               }
+       }
+       if (info->add_set.flags[IP_SET_MAX_BINDINGS] != 0
+           || info->del_set.flags[IP_SET_MAX_BINDINGS] != 0) {
+               ip_set_printk("That's nasty!");
+               return 0;       /* error */
+       }
+
+       return 1;
+}
+
+static void destroy(void *targetinfo, unsigned int targetsize)
+{
+       struct ipt_set_info_target *info = targetinfo;
+
+       if (targetsize != IPT_ALIGN(sizeof(struct ipt_set_info_target))) {
+               ip_set_printk("invalid targetsize %d", targetsize);
+               return;
+       }
+
+       if (info->add_set.index != IP_SET_INVALID_ID)
+               ip_set_put(info->add_set.index);
+       if (info->del_set.index != IP_SET_INVALID_ID)
+               ip_set_put(info->del_set.index);
+}
+
+static struct ipt_target SET_target = {
+       .name           = "SET",
+       .target         = target,
+       .checkentry     = checkentry,
+       .destroy        = destroy,
+       .me             = THIS_MODULE
+};
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
+MODULE_DESCRIPTION("iptables IP set target module");
+
+static int __init init(void)
+{
+       return ipt_register_target(&SET_target);
+}
+
+static void __exit fini(void)
+{
+       ipt_unregister_target(&SET_target);
+}
+
+module_init(init);
+module_exit(fini);