[NETFILTER]: ip6t_LOG and packets with hop-by-hop options.

Packet with IPPROTO_HOPOPTS extended header isn't logged properly by
ip6t_LOG.c. It only prints PROTO=0 and nothing more, because
IPPROTO_HOPOPTS=0 and in this file 0 is used to indicate last header.
This patch fix it by using IPPROTO_NONE to indicate last header.
Signed-off-by: Marcel Sebek <sebek64@post.cz>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@redhat.com>

net/ipv6/netfilter/ip6t_LOG.c

@@ -48,10 +48,10 @@ static spinlock_t log_lock = SPIN_LOCK_UNLOCKED;
 
 /* takes in current header and pointer to the header */
 /* if another header exists, sets hdrptr to the next header
-   and returns the new header value, else returns 0 */
+   and returns the new header value, else returns IPPROTO_NONE */
 static u_int8_t ip6_nexthdr(u_int8_t currenthdr, u_int8_t **hdrptr)
 {
-	u_int8_t hdrlen, nexthdr = 0;
+	u_int8_t hdrlen, nexthdr = IPPROTO_NONE;
 
 	switch(currenthdr){
 		case IPPROTO_AH:
@@ -77,7 +77,6 @@ static u_int8_t ip6_nexthdr(u_int8_t currenthdr, u_int8_t **hdrptr)
 			break;
 	}	
 	return nexthdr;
-
 }
 
 /* One level of recursion won't kill us */
@@ -101,7 +100,7 @@ static void dump_packet(const struct ip6t_log_info *info,
 
 	fragment = 0;
 	hdrptr = (u_int8_t *)(ipv6h + 1);
-	while (currenthdr) {
+	while (currenthdr != IPPROTO_NONE) {
 		if ((currenthdr == IPPROTO_TCP) ||
 		    (currenthdr == IPPROTO_UDP) ||
 		    (currenthdr == IPPROTO_ICMPV6))
@@ -264,7 +263,7 @@ static void dump_packet(const struct ip6t_log_info *info,
 		}
 		break;
 	}
-	/* Max length: 10 "PROTO 255 " */
+	/* Max length: 10 "PROTO=255 " */
 	default:
 		printk("PROTO=%u ", currenthdr);
 	}