Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / netfilter / xt_pkttype.c

diff --git a/kernel/net/netfilter/xt_pkttype.c b/kernel/net/netfilter/xt_pkttype.c
new file mode 100644 (file)
index 0000000..5b645cb
--- /dev/null
+++ b/kernel/net/netfilter/xt_pkttype.c
@@ -0,0 +1,65 @@
+/* (C) 1999-2001 Michal Ludvig <michal@logix.cz>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <linux/if_packet.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+
+#include <linux/netfilter/xt_pkttype.h>
+#include <linux/netfilter/x_tables.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michal Ludvig <michal@logix.cz>");
+MODULE_DESCRIPTION("Xtables: link layer packet type match");
+MODULE_ALIAS("ipt_pkttype");
+MODULE_ALIAS("ip6t_pkttype");
+
+static bool
+pkttype_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+       const struct xt_pkttype_info *info = par->matchinfo;
+       u_int8_t type;
+
+       if (skb->pkt_type != PACKET_LOOPBACK)
+               type = skb->pkt_type;
+       else if (par->family == NFPROTO_IPV4 &&
+           ipv4_is_multicast(ip_hdr(skb)->daddr))
+               type = PACKET_MULTICAST;
+       else if (par->family == NFPROTO_IPV6 &&
+           ipv6_hdr(skb)->daddr.s6_addr[0] == 0xFF)
+               type = PACKET_MULTICAST;
+       else
+               type = PACKET_BROADCAST;
+
+       return (type == info->pkttype) ^ info->invert;
+}
+
+static struct xt_match pkttype_mt_reg __read_mostly = {
+       .name      = "pkttype",
+       .revision  = 0,
+       .family    = NFPROTO_UNSPEC,
+       .match     = pkttype_mt,
+       .matchsize = sizeof(struct xt_pkttype_info),
+       .me        = THIS_MODULE,
+};
+
+static int __init pkttype_mt_init(void)
+{
+       return xt_register_match(&pkttype_mt_reg);
+}
+
+static void __exit pkttype_mt_exit(void)
+{
+       xt_unregister_match(&pkttype_mt_reg);
+}
+
+module_init(pkttype_mt_init);
+module_exit(pkttype_mt_exit);