X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fipv6%2Fnetfilter%2Fip6t_esp.c;fp=net%2Fipv6%2Fnetfilter%2Fip6t_esp.c;h=724285df87115e5e75e26e99c248ca0cab823dfd;hb=64ba3f394c830ec48a1c31b53dcae312c56f1604;hp=e39dd236fd8e60e5fc2ae95e9d31b7969e9d1564;hpb=be1e6109ac94a859551f8e1774eb9a8469fe055c;p=linux-2.6.git

diff --git a/net/ipv6/netfilter/ip6t_esp.c b/net/ipv6/netfilter/ip6t_esp.c
index e39dd236f..724285df8 100644
--- a/net/ipv6/netfilter/ip6t_esp.c
+++ b/net/ipv6/netfilter/ip6t_esp.c
@@ -9,6 +9,7 @@
 
 #include <linux/module.h>
 #include <linux/skbuff.h>
+#include <linux/ip.h>
 #include <linux/ipv6.h>
 #include <linux/types.h>
 #include <net/checksum.h>
@@ -48,87 +49,22 @@ match(const struct sk_buff *skb,
       unsigned int protoff,
       int *hotdrop)
 {
-	struct ip_esp_hdr _esp, *eh = NULL;
+	struct ip_esp_hdr _esp, *eh;
 	const struct ip6t_esp *espinfo = matchinfo;
-	unsigned int temp;
-	int len;
-	u8 nexthdr;
 	unsigned int ptr;
 
 	/* Make sure this isn't an evil packet */
 	/*DEBUGP("ipv6_esp entered \n");*/
 
-	/* type of the 1st exthdr */
-	nexthdr = skb->nh.ipv6h->nexthdr;
-	/* pointer to the 1st exthdr */
-	ptr = sizeof(struct ipv6hdr);
-	/* available length */
-	len = skb->len - ptr;
-	temp = 0;
-
-	while (ip6t_ext_hdr(nexthdr)) {
-		struct ipv6_opt_hdr _hdr, *hp;
-		int hdrlen;
-
-		DEBUGP("ipv6_esp header iteration \n");
-
-		/* Is there enough space for the next ext header? */
-		if (len < sizeof(struct ipv6_opt_hdr))
-			return 0;
-		/* No more exthdr -> evaluate */
-		if (nexthdr == NEXTHDR_NONE)
-			break;
-		/* ESP -> evaluate */
-		if (nexthdr == NEXTHDR_ESP) {
-			temp |= MASK_ESP;
-			break;
-		}
-
-		hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
-		BUG_ON(hp == NULL);
-
-		/* Calculate the header length */
-		if (nexthdr == NEXTHDR_FRAGMENT)
-			hdrlen = 8;
-		else if (nexthdr == NEXTHDR_AUTH)
-			hdrlen = (hp->hdrlen+2)<<2;
-		else
-			hdrlen = ipv6_optlen(hp);
-
-		/* set the flag */
-		switch (nexthdr) {
-		case NEXTHDR_HOP:
-		case NEXTHDR_ROUTING:
-		case NEXTHDR_FRAGMENT:
-		case NEXTHDR_AUTH:
-		case NEXTHDR_DEST:
-			break;
-		default:
-			DEBUGP("ipv6_esp match: unknown nextheader %u\n",nexthdr);
-			return 0;
-		}
-
-		nexthdr = hp->nexthdr;
-		len -= hdrlen;
-		ptr += hdrlen;
-		if (ptr > skb->len) {
-			DEBUGP("ipv6_esp: new pointer too large! \n");
-			break;
-		}
-	}
-
-	/* ESP header not found */
-	if (temp != MASK_ESP)
+	if (ipv6_find_hdr(skb, &ptr, NEXTHDR_ESP, NULL) < 0)
 		return 0;
 
-	if (len < sizeof(struct ip_esp_hdr)) {
+	eh = skb_header_pointer(skb, ptr, sizeof(_esp), &_esp);
+	if (eh == NULL) {
 		*hotdrop = 1;
 		return 0;
 	}
 
-	eh = skb_header_pointer(skb, ptr, sizeof(_esp), &_esp);
-	BUG_ON(eh == NULL);
-
 	DEBUGP("IPv6 ESP SPI %u %08X\n", ntohl(eh->spi), ntohl(eh->spi));
 
 	return (eh != NULL)
@@ -140,7 +76,7 @@ match(const struct sk_buff *skb,
 /* Called when user tries to insert an entry of this type. */
 static int
 checkentry(const char *tablename,
-	   const struct ip6t_ip6 *ip,
+	   const void *ip,
 	   void *matchinfo,
 	   unsigned int matchinfosize,
 	   unsigned int hook_mask)