patch-2.4.20 linux-2.4.20/net/ipv6/netfilter/ip6t_eui64.c
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- Lines: 90
- Date:
Thu Nov 28 15:53:15 2002
- Orig file:
linux-2.4.19/net/ipv6/netfilter/ip6t_eui64.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/net/ipv6/netfilter/ip6t_eui64.c linux-2.4.20/net/ipv6/netfilter/ip6t_eui64.c
@@ -0,0 +1,89 @@
+/* Kernel module to match EUI64 address parameters. */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ipv6.h>
+#include <linux/if_ether.h>
+
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+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)
+{
+
+ unsigned char eui64[8];
+ int i=0;
+
+ if ( !(skb->mac.raw >= skb->head
+ && (skb->mac.raw + ETH_HLEN) <= skb->data)
+ && offset != 0) {
+ *hotdrop = 1;
+ return 0;
+ }
+
+ memset(eui64, 0, sizeof(eui64));
+
+ if (skb->mac.ethernet->h_proto == ntohs(ETH_P_IPV6)) {
+ if (skb->nh.ipv6h->version == 0x6) {
+ memcpy(eui64, skb->mac.ethernet->h_source, 3);
+ memcpy(eui64 + 5, skb->mac.ethernet->h_source + 3, 3);
+ eui64[3]=0xff;
+ eui64[4]=0xfe;
+ eui64[0] |= 0x02;
+
+ i=0;
+ while ((skb->nh.ipv6h->saddr.in6_u.u6_addr8[8+i] ==
+ eui64[i]) && (i<8)) i++;
+
+ if ( i == 8 )
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int
+ip6t_eui64_checkentry(const char *tablename,
+ const struct ip6t_ip6 *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ if (hook_mask
+ & ~((1 << NF_IP6_PRE_ROUTING) | (1 << NF_IP6_LOCAL_IN) |
+ (1 << NF_IP6_PRE_ROUTING) )) {
+ printk("ip6t_eui64: only valid for PRE_ROUTING, LOCAL_IN or FORWARD.\n");
+ return 0;
+ }
+
+ if (matchsize != IP6T_ALIGN(sizeof(int)))
+ return 0;
+
+ return 1;
+}
+
+static struct ip6t_match eui64_match
+= { { NULL, NULL }, "eui64", &match, &ip6t_eui64_checkentry, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+ return ip6t_register_match(&eui64_match);
+}
+
+static void __exit fini(void)
+{
+ ip6t_unregister_match(&eui64_match);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_DESCRIPTION("IPv6 EUI64 address checking match");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
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