Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / bridge / netfilter / ebt_dnat.c

diff --git a/kernel/net/bridge/netfilter/ebt_dnat.c b/kernel/net/bridge/netfilter/ebt_dnat.c
new file mode 100644 (file)
index 0000000..4e0b0c3
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_dnat.c
@@ -0,0 +1,74 @@
+/*
+ *  ebt_dnat
+ *
+ *     Authors:
+ *     Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  June, 2002
+ *
+ */
+#include <linux/module.h>
+#include <net/sock.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_nat.h>
+
+static unsigned int
+ebt_dnat_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+       const struct ebt_nat_info *info = par->targinfo;
+
+       if (!skb_make_writable(skb, 0))
+               return EBT_DROP;
+
+       ether_addr_copy(eth_hdr(skb)->h_dest, info->mac);
+       return info->target;
+}
+
+static int ebt_dnat_tg_check(const struct xt_tgchk_param *par)
+{
+       const struct ebt_nat_info *info = par->targinfo;
+       unsigned int hook_mask;
+
+       if (BASE_CHAIN && info->target == EBT_RETURN)
+               return -EINVAL;
+
+       hook_mask = par->hook_mask & ~(1 << NF_BR_NUMHOOKS);
+       if ((strcmp(par->table, "nat") != 0 ||
+           (hook_mask & ~((1 << NF_BR_PRE_ROUTING) |
+           (1 << NF_BR_LOCAL_OUT)))) &&
+           (strcmp(par->table, "broute") != 0 ||
+           hook_mask & ~(1 << NF_BR_BROUTING)))
+               return -EINVAL;
+       if (INVALID_TARGET)
+               return -EINVAL;
+       return 0;
+}
+
+static struct xt_target ebt_dnat_tg_reg __read_mostly = {
+       .name           = "dnat",
+       .revision       = 0,
+       .family         = NFPROTO_BRIDGE,
+       .hooks          = (1 << NF_BR_NUMHOOKS) | (1 << NF_BR_PRE_ROUTING) |
+                         (1 << NF_BR_LOCAL_OUT) | (1 << NF_BR_BROUTING),
+       .target         = ebt_dnat_tg,
+       .checkentry     = ebt_dnat_tg_check,
+       .targetsize     = sizeof(struct ebt_nat_info),
+       .me             = THIS_MODULE,
+};
+
+static int __init ebt_dnat_init(void)
+{
+       return xt_register_target(&ebt_dnat_tg_reg);
+}
+
+static void __exit ebt_dnat_fini(void)
+{
+       xt_unregister_target(&ebt_dnat_tg_reg);
+}
+
+module_init(ebt_dnat_init);
+module_exit(ebt_dnat_fini);
+MODULE_DESCRIPTION("Ebtables: Destination MAC address translation");
+MODULE_LICENSE("GPL");