[IPV6]: Bring Type 0 routing header in-line with rfc3542.

Signed-off-by: NBrian Haley <brian.haley@hp.com>
Signed-off-by: NYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/ipv6.h

@@ -68,7 +68,7 @@ struct ipv6_opt_hdr {
 
 struct rt0_hdr {
 	struct ipv6_rt_hdr	rt_hdr;
-	__u32			bitmap;		/* strict/loose bit map */
+	__u32			reserved;
 	struct in6_addr		addr[0];
 
 #define rt0_type		rt_hdr.type

net/ipv6/exthdrs.c

@@ -406,8 +406,7 @@ ipv6_invert_rthdr(struct sock *sk, struct ipv6_rt_hdr *hdr)
 
 	memcpy(opt->srcrt, hdr, sizeof(*hdr));
 	irthdr = (struct rt0_hdr*)opt->srcrt;
-	/* Obsolete field, MBZ, when originated by us */
-	irthdr->bitmap = 0;
+	irthdr->reserved = 0;
 	opt->srcrt->segments_left = n;
 	for (i=0; i<n; i++)
 		memcpy(irthdr->addr+i, rthdr->addr+(n-1-i), 16);

net/ipv6/netfilter/ip6t_rt.c

@@ -161,8 +161,8 @@ match(const struct sk_buff *skb,
                            ((rtinfo->hdrlen == hdrlen) ^
                            !!(rtinfo->invflags & IP6T_RT_INV_LEN))));
        DEBUGP("res %02X %02X %02X ", 
-       		(rtinfo->flags & IP6T_RT_RES), ((struct rt0_hdr *)rh)->bitmap,
-       		!((rtinfo->flags & IP6T_RT_RES) && (((struct rt0_hdr *)rh)->bitmap)));
+       		(rtinfo->flags & IP6T_RT_RES), ((struct rt0_hdr *)rh)->reserved,
+       		!((rtinfo->flags & IP6T_RT_RES) && (((struct rt0_hdr *)rh)->reserved)));
 
        ret = (rh != NULL)
        		&&
@@ -179,12 +179,12 @@ match(const struct sk_buff *skb,
                            !!(rtinfo->invflags & IP6T_RT_INV_TYP)));
 
 	if (ret && (rtinfo->flags & IP6T_RT_RES)) {
-		u_int32_t *bp, _bitmap;
-		bp = skb_header_pointer(skb,
-					ptr + offsetof(struct rt0_hdr, bitmap),
-					sizeof(_bitmap), &_bitmap);
+		u_int32_t *rp, _reserved;
+		rp = skb_header_pointer(skb,
+					ptr + offsetof(struct rt0_hdr, reserved),
+					sizeof(_reserved), &_reserved);
 
-		ret = (*bp == 0);
+		ret = (*rp == 0);
 	}
 
 	DEBUGP("#%d ",rtinfo->addrnr);