patch-2.4.20 linux-2.4.20/net/ipv4/netfilter/ipt_pkttype.c
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- Lines: 60
- Date:
Thu Nov 28 15:53:15 2002
- Orig file:
linux-2.4.19/net/ipv4/netfilter/ipt_pkttype.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/net/ipv4/netfilter/ipt_pkttype.c linux-2.4.20/net/ipv4/netfilter/ipt_pkttype.c
@@ -0,0 +1,59 @@
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <linux/if_packet.h>
+
+#include <linux/netfilter_ipv4/ipt_pkttype.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+MODULE_LICENSE("GPL");
+
+static int match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ const void *hdr,
+ u_int16_t datalen,
+ int *hotdrop)
+{
+ const struct ipt_pkttype_info *info = matchinfo;
+
+ return (skb->pkt_type == info->pkttype) ^ info->invert;
+}
+
+static int checkentry(const char *tablename,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+/*
+ if (hook_mask
+ & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_IN)
+ | (1 << NF_IP_FORWARD))) {
+ printk("ipt_pkttype: only valid for PRE_ROUTING, LOCAL_IN or FORWARD.\n");
+ return 0;
+ }
+*/
+ if (matchsize != IPT_ALIGN(sizeof(struct ipt_pkttype_info)))
+ return 0;
+
+ return 1;
+}
+
+static struct ipt_match pkttype_match
+= { { NULL, NULL }, "pkttype", &match, &checkentry, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+ return ipt_register_match(&pkttype_match);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_match(&pkttype_match);
+}
+
+module_init(init);
+module_exit(fini);
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