[IPV4/IPV6]: General cleanups.

- Use s6_XXX instead of in6_u.s6_XXX
- Use macros not magic numbers
- Avoid __constant_{hton,ntoh}{l,s} in runtime code.

net/ipv4/igmp.c

@@ -229,7 +229,7 @@ static int igmp_send_report(struct net_device *dev, u32 group, int type)
 	iph->version  = 4;
 	iph->ihl      = (sizeof(struct iphdr)+4)>>2;
 	iph->tos      = 0;
-	iph->frag_off = __constant_htons(IP_DF);
+	iph->frag_off = htons(IP_DF);
 	iph->ttl      = 1;
 	iph->daddr    = dst;
 	iph->saddr    = rt->rt_src;

net/ipv4/ip_gre.c

@@ -414,7 +414,7 @@ void ipgre_err(struct sk_buff *skb, u32 info)
 	struct sk_buff *skb2;
 	struct rtable *rt;
 
-	if (p[1] != __constant_htons(ETH_P_IP))
+	if (p[1] != htons(ETH_P_IP))
 		return;
 
 	flags = p[0];
@@ -537,10 +537,10 @@ void ipgre_err(struct sk_buff *skb, u32 info)
 static inline void ipgre_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
 {
 	if (INET_ECN_is_ce(iph->tos)) {
-		if (skb->protocol == __constant_htons(ETH_P_IP)) {
+		if (skb->protocol == htons(ETH_P_IP)) {
 			if (INET_ECN_is_not_ce(skb->nh.iph->tos))
 				IP_ECN_set_ce(skb->nh.iph);
-		} else if (skb->protocol == __constant_htons(ETH_P_IPV6)) {
+		} else if (skb->protocol == htons(ETH_P_IPV6)) {
 			if (INET_ECN_is_not_ce(ip6_get_dsfield(skb->nh.ipv6h)))
 				IP6_ECN_set_ce(skb->nh.ipv6h);
 		}
@@ -551,9 +551,9 @@ static inline u8
 ipgre_ecn_encapsulate(u8 tos, struct iphdr *old_iph, struct sk_buff *skb)
 {
 	u8 inner = 0;
-	if (skb->protocol == __constant_htons(ETH_P_IP))
+	if (skb->protocol == htons(ETH_P_IP))
 		inner = old_iph->tos;
-	else if (skb->protocol == __constant_htons(ETH_P_IPV6))
+	else if (skb->protocol == htons(ETH_P_IPV6))
 		inner = ip6_get_dsfield((struct ipv6hdr*)old_iph);
 	return INET_ECN_encapsulate(tos, inner);
 }
@@ -710,13 +710,13 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 			goto tx_error;
 		}
 
-		if (skb->protocol == __constant_htons(ETH_P_IP)) {
+		if (skb->protocol == htons(ETH_P_IP)) {
 			rt = (struct rtable*)skb->dst;
 			if ((dst = rt->rt_gateway) == 0)
 				goto tx_error_icmp;
 		}
 #ifdef CONFIG_IPV6
-		else if (skb->protocol == __constant_htons(ETH_P_IPV6)) {
+		else if (skb->protocol == htons(ETH_P_IPV6)) {
 			struct in6_addr *addr6;
 			int addr_type;
 			struct neighbour *neigh = skb->dst->neighbour;
@@ -744,7 +744,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	tos = tiph->tos;
 	if (tos&1) {
-		if (skb->protocol == __constant_htons(ETH_P_IP))
+		if (skb->protocol == htons(ETH_P_IP))
 			tos = old_iph->tos;
 		tos &= ~1;
 	}
@@ -767,13 +767,13 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	else
 		mtu = skb->dst ? skb->dst->pmtu : dev->mtu;
 
-	if (skb->protocol == __constant_htons(ETH_P_IP)) {
+	if (skb->protocol == htons(ETH_P_IP)) {
 		if (skb->dst && mtu < skb->dst->pmtu && mtu >= 68)
 			skb->dst->pmtu = mtu;
 
-		df |= (old_iph->frag_off&__constant_htons(IP_DF));
+		df |= (old_iph->frag_off&htons(IP_DF));
 
-		if ((old_iph->frag_off&__constant_htons(IP_DF)) &&
+		if ((old_iph->frag_off&htons(IP_DF)) &&
 		    mtu < ntohs(old_iph->tot_len)) {
 			icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu));
 			ip_rt_put(rt);
@@ -781,7 +781,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 		}
 	}
 #ifdef CONFIG_IPV6
-	else if (skb->protocol == __constant_htons(ETH_P_IPV6)) {
+	else if (skb->protocol == htons(ETH_P_IPV6)) {
 		struct rt6_info *rt6 = (struct rt6_info*)skb->dst;
 
 		if (rt6 && mtu < rt6->u.dst.pmtu && mtu >= IPV6_MIN_MTU) {
@@ -847,10 +847,10 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	iph->saddr		=	rt->rt_src;
 
 	if ((iph->ttl = tiph->ttl) == 0) {
-		if (skb->protocol == __constant_htons(ETH_P_IP))
+		if (skb->protocol == htons(ETH_P_IP))
 			iph->ttl = old_iph->ttl;
 #ifdef CONFIG_IPV6
-		else if (skb->protocol == __constant_htons(ETH_P_IPV6))
+		else if (skb->protocol == htons(ETH_P_IPV6))
 			iph->ttl = ((struct ipv6hdr*)old_iph)->hop_limit;
 #endif
 		else
@@ -938,11 +938,11 @@ ipgre_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
 
 		err = -EINVAL;
 		if (p.iph.version != 4 || p.iph.protocol != IPPROTO_GRE ||
-		    p.iph.ihl != 5 || (p.iph.frag_off&__constant_htons(~IP_DF)) ||
+		    p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF)) ||
 		    ((p.i_flags|p.o_flags)&(GRE_VERSION|GRE_ROUTING)))
 			goto done;
 		if (p.iph.ttl)
-			p.iph.frag_off |= __constant_htons(IP_DF);
+			p.iph.frag_off |= htons(IP_DF);
 
 		if (!(p.i_flags&GRE_KEY))
 			p.i_key = 0;

net/ipv4/ip_output.c

@@ -136,7 +136,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
 	iph->ihl      = 5;
 	iph->tos      = inet->tos;
 	if (ip_dont_fragment(sk, &rt->u.dst))
-		iph->frag_off = __constant_htons(IP_DF);
+		iph->frag_off = htons(IP_DF);
 	else
 		iph->frag_off = 0;
 	iph->ttl      = inet->ttl;
@@ -187,7 +187,7 @@ __inline__ int ip_finish_output(struct sk_buff *skb)
 	struct net_device *dev = skb->dst->dev;
 
 	skb->dev = dev;
-	skb->protocol = __constant_htons(ETH_P_IP);
+	skb->protocol = htons(ETH_P_IP);
 
 	return NF_HOOK(PF_INET, NF_IP_POST_ROUTING, skb, NULL, dev,
 		       ip_finish_output2);
@@ -209,7 +209,7 @@ int ip_mc_output(struct sk_buff *skb)
 #endif
 
 	skb->dev = dev;
-	skb->protocol = __constant_htons(ETH_P_IP);
+	skb->protocol = htons(ETH_P_IP);
 
 	/*
 	 *	Multicasts are looped back for other local users
@@ -394,7 +394,7 @@ int ip_queue_xmit(struct sk_buff *skb)
 	*((__u16 *)iph)	= htons((4 << 12) | (5 << 8) | (inet->tos & 0xff));
 	iph->tot_len = htons(skb->len);
 	if (ip_dont_fragment(sk, &rt->u.dst))
-		iph->frag_off = __constant_htons(IP_DF);
+		iph->frag_off = htons(IP_DF);
 	else
 		iph->frag_off = 0;
 	iph->ttl      = inet->ttl;
@@ -463,7 +463,7 @@ static int ip_build_xmit_slow(struct sock *sk,
 
 	mtu = rt->u.dst.pmtu;
 	if (ip_dont_fragment(sk, &rt->u.dst))
-		df = __constant_htons(IP_DF);
+		df = htons(IP_DF);
 
 	length -= sizeof(struct iphdr);
 
@@ -594,7 +594,7 @@ static int ip_build_xmit_slow(struct sock *sk,
 				/*
 				 *	Any further fragments will have MF set.
 				 */
-				mf = __constant_htons(IP_MF);
+				mf = htons(IP_MF);
 			}
 			if (rt->rt_type == RTN_MULTICAST)
 				iph->ttl = inet->mc_ttl;
@@ -693,7 +693,7 @@ int ip_build_xmit(struct sock *sk,
 	 */
 	df = 0;
 	if (ip_dont_fragment(sk, &rt->u.dst))
-		df = __constant_htons(IP_DF);
+		df = htons(IP_DF);
 
 	/* 
 	 *	Fast path for unfragmented frames without options. 
@@ -797,7 +797,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
 	 */
 
 	offset = (ntohs(iph->frag_off) & IP_OFFSET) << 3;
-	not_last_frag = iph->frag_off & __constant_htons(IP_MF);
+	not_last_frag = iph->frag_off & htons(IP_MF);
 
 	/*
 	 *	Keep copying data until we run out.
@@ -882,7 +882,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
 		 *		   last fragment then keep MF on each bit
 		 */
 		if (left > 0 || not_last_frag)
-			iph->frag_off |= __constant_htons(IP_MF);
+			iph->frag_off |= htons(IP_MF);
 		ptr += len;
 		offset += len;
 

net/ipv4/ipconfig.c

@@ -362,11 +362,11 @@ static int __init ic_defaults(void)
 
 	if (ic_netmask == INADDR_NONE) {
 		if (IN_CLASSA(ntohl(ic_myaddr)))
-			ic_netmask = __constant_htonl(IN_CLASSA_NET);
+			ic_netmask = htonl(IN_CLASSA_NET);
 		else if (IN_CLASSB(ntohl(ic_myaddr)))
-			ic_netmask = __constant_htonl(IN_CLASSB_NET);
+			ic_netmask = htonl(IN_CLASSB_NET);
 		else if (IN_CLASSC(ntohl(ic_myaddr)))
-			ic_netmask = __constant_htonl(IN_CLASSC_NET);
+			ic_netmask = htonl(IN_CLASSC_NET);
 		else {
 			printk(KERN_ERR "IP-Config: Unable to guess netmask for address %u.%u.%u.%u\n",
 				NIPQUAD(ic_myaddr));
@@ -432,11 +432,11 @@ ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 		goto drop;
 
 	/* If it's not a RARP reply, delete it. */
-	if (rarp->ar_op != __constant_htons(ARPOP_RREPLY))
+	if (rarp->ar_op != htons(ARPOP_RREPLY))
 		goto drop;
 
 	/* If it's not Ethernet, delete it. */
-	if (rarp->ar_pro != __constant_htons(ETH_P_IP))
+	if (rarp->ar_pro != htons(ETH_P_IP))
 		goto drop;
 
 	/* Extract variable-width fields */
@@ -672,15 +672,15 @@ static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_d
 	h->version = 4;
 	h->ihl = 5;
 	h->tot_len = htons(sizeof(struct bootp_pkt));
-	h->frag_off = __constant_htons(IP_DF);
+	h->frag_off = htons(IP_DF);
 	h->ttl = 64;
 	h->protocol = IPPROTO_UDP;
 	h->daddr = INADDR_BROADCAST;
 	h->check = ip_fast_csum((unsigned char *) h, h->ihl);
 
 	/* Construct UDP header */
-	b->udph.source = __constant_htons(68);
-	b->udph.dest = __constant_htons(67);
+	b->udph.source = htons(68);
+	b->udph.dest = htons(67);
 	b->udph.len = htons(sizeof(struct bootp_pkt) - sizeof(struct iphdr));
 	/* UDP checksum not calculated -- explicitly allowed in BOOTP RFC */
 
@@ -711,7 +711,7 @@ static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_d
 
 	/* Chain packet down the line... */
 	skb->dev = dev;
-	skb->protocol = __constant_htons(ETH_P_IP);
+	skb->protocol = htons(ETH_P_IP);
 	if ((dev->hard_header &&
 	     dev->hard_header(skb, dev, ntohs(skb->protocol), dev->broadcast, dev->dev_addr, skb->len) < 0) ||
 	    dev_queue_xmit(skb) < 0)
@@ -819,13 +819,13 @@ static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, str
 	    ip_fast_csum((char *) h, h->ihl) != 0 ||
 	    skb->len < ntohs(h->tot_len) ||
 	    h->protocol != IPPROTO_UDP ||
-	    b->udph.source != __constant_htons(67) ||
-	    b->udph.dest != __constant_htons(68) ||
+	    b->udph.source != htons(67) ||
+	    b->udph.dest != htons(68) ||
 	    ntohs(h->tot_len) < ntohs(b->udph.len) + sizeof(struct iphdr))
 		goto drop;
 
 	/* Fragments are not supported */
-	if (h->frag_off & __constant_htons(IP_OFFSET | IP_MF)) {
+	if (h->frag_off & htons(IP_OFFSET | IP_MF)) {
 		printk(KERN_ERR "DHCP/BOOTP: Ignoring fragmented reply.\n");
 		goto drop;
 	}

net/ipv4/ipip.c

@@ -483,7 +483,7 @@ int ipip_rcv(struct sk_buff *skb)
 	skb->mac.raw = skb->nh.raw;
 	skb->nh.raw = skb->data;
 	memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
-	skb->protocol = __constant_htons(ETH_P_IP);
+	skb->protocol = htons(ETH_P_IP);
 	skb->pkt_type = PACKET_HOST;
 
 	read_lock(&ipip_lock);
@@ -544,7 +544,7 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 		goto tx_error;
 	}
 
-	if (skb->protocol != __constant_htons(ETH_P_IP))
+	if (skb->protocol != htons(ETH_P_IP))
 		goto tx_error;
 
 	if (tos&1)
@@ -585,9 +585,9 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	if (skb->dst && mtu < skb->dst->pmtu)
 		skb->dst->pmtu = mtu;
 
-	df |= (old_iph->frag_off&__constant_htons(IP_DF));
+	df |= (old_iph->frag_off&htons(IP_DF));
 
-	if ((old_iph->frag_off&__constant_htons(IP_DF)) && mtu < ntohs(old_iph->tot_len)) {
+	if ((old_iph->frag_off&htons(IP_DF)) && mtu < ntohs(old_iph->tot_len)) {
 		icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu));
 		ip_rt_put(rt);
 		goto tx_error;
@@ -703,10 +703,10 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
 
 		err = -EINVAL;
 		if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP ||
-		    p.iph.ihl != 5 || (p.iph.frag_off&__constant_htons(~IP_DF)))
+		    p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF)))
 			goto done;
 		if (p.iph.ttl)
-			p.iph.frag_off |= __constant_htons(IP_DF);
+			p.iph.frag_off |= htons(IP_DF);
 
 		t = ipip_tunnel_locate(&p, cmd == SIOCADDTUNNEL);
 

net/ipv4/ipmr.c

@@ -1434,7 +1434,7 @@ int pim_rcv_v1(struct sk_buff * skb)
 	skb->nh.iph = (struct iphdr *)skb->data;
 	skb->dev = reg_dev;
 	memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
-	skb->protocol = __constant_htons(ETH_P_IP);
+	skb->protocol = htons(ETH_P_IP);
 	skb->ip_summed = 0;
 	skb->pkt_type = PACKET_HOST;
 	dst_release(skb->dst);
@@ -1501,7 +1501,7 @@ int pim_rcv(struct sk_buff * skb)
 	skb->nh.iph = (struct iphdr *)skb->data;
 	skb->dev = reg_dev;
 	memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
-	skb->protocol = __constant_htons(ETH_P_IP);
+	skb->protocol = htons(ETH_P_IP);
 	skb->ip_summed = 0;
 	skb->pkt_type = PACKET_HOST;
 	dst_release(skb->dst);

net/ipv4/netfilter/ip_nat_core.c

@@ -804,7 +804,7 @@ do_bindings(struct ip_conntrack *ct,
 
 		/* Always defragged for helpers */
 		IP_NF_ASSERT(!((*pskb)->nh.iph->frag_off
-			       & __constant_htons(IP_MF|IP_OFFSET)));
+			       & htons(IP_MF|IP_OFFSET)));
 
 		/* Have to grab read lock before sibling_list traversal */
 		READ_LOCK(&ip_conntrack_lock);

net/ipv4/netfilter/ip_nat_snmp_basic.c

@@ -1260,9 +1260,9 @@ static unsigned int nat_help(struct ip_conntrack *ct,
 	 * on post routing (SNAT).
 	 */
 	if (!((dir == IP_CT_DIR_REPLY && hooknum == NF_IP_PRE_ROUTING &&
-			udph->source == __constant_ntohs(SNMP_PORT)) ||
+			udph->source == ntohs(SNMP_PORT)) ||
 	      (dir == IP_CT_DIR_ORIGINAL && hooknum == NF_IP_POST_ROUTING &&
-	      		udph->dest == __constant_ntohs(SNMP_TRAP_PORT)))) {
+	      		udph->dest == ntohs(SNMP_TRAP_PORT)))) {
 		spin_unlock_bh(&snmp_lock);
 		return NF_ACCEPT;
 	}

net/ipv4/netfilter/ip_nat_standalone.c

@@ -75,7 +75,7 @@ ip_nat_fn(unsigned int hooknum,
 	/* We never see fragments: conntrack defrags on pre-routing
 	   and local-out, and ip_nat_out protects post-routing. */
 	IP_NF_ASSERT(!((*pskb)->nh.iph->frag_off
-		       & __constant_htons(IP_MF|IP_OFFSET)));
+		       & htons(IP_MF|IP_OFFSET)));
 
 	(*pskb)->nfcache |= NFC_UNKNOWN;
 
@@ -186,7 +186,7 @@ ip_nat_out(unsigned int hooknum,
 
 	   I'm starting to have nightmares about fragments.  */
 
-	if ((*pskb)->nh.iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) {
+	if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
 		*pskb = ip_ct_gather_frags(*pskb);
 
 		if (!*pskb)

net/ipv4/route.c

@@ -1244,7 +1244,7 @@ static int ip_route_input_mc(struct sk_buff *skb, u32 daddr, u32 saddr,
 		return -EINVAL;
 
 	if (MULTICAST(saddr) || BADCLASS(saddr) || LOOPBACK(saddr) ||
-	    skb->protocol != __constant_htons(ETH_P_IP))
+	    skb->protocol != htons(ETH_P_IP))
 		goto e_inval;
 
 	if (ZERONET(saddr)) {
@@ -1455,7 +1455,7 @@ int ip_route_input_slow(struct sk_buff *skb, u32 daddr, u32 saddr,
 	     inet_addr_onlink(out_dev, saddr, FIB_RES_GW(res))))
 		flags |= RTCF_DOREDIRECT;
 
-	if (skb->protocol != __constant_htons(ETH_P_IP)) {
+	if (skb->protocol != htons(ETH_P_IP)) {
 		/* Not IP (i.e. ARP). Do not create route, if it is
 		 * invalid for proxy arp. DNAT routes are always valid.
 		 */
@@ -1520,7 +1520,7 @@ int ip_route_input_slow(struct sk_buff *skb, u32 daddr, u32 saddr,
 out:	return err;
 
 brd_input:
-	if (skb->protocol != __constant_htons(ETH_P_IP))
+	if (skb->protocol != htons(ETH_P_IP))
 		goto e_inval;
 
 	if (ZERONET(saddr))
@@ -2154,7 +2154,7 @@ int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 		err = -ENODEV;
 		if (!dev)
 			goto out;
-		skb->protocol	= __constant_htons(ETH_P_IP);
+		skb->protocol	= htons(ETH_P_IP);
 		skb->dev	= dev;
 		local_bh_disable();
 		err = ip_route_input(skb, dst, src, rtm->rtm_tos, dev);

net/ipv4/tcp_diag.c

@@ -360,7 +360,7 @@ int tcpdiag_bc_run(char *bc, int len, struct sock *sk)
 				break;
 			if (sk->family == AF_INET6 && cond->family == AF_INET) {
 				if (addr[0] == 0 && addr[1] == 0 &&
-				    addr[2] == __constant_htonl(0xffff) &&
+				    addr[2] == htonl(0xffff) &&
 				    bitstring_match(addr+3, cond->addr, cond->prefix_len))
 					break;
 			}

net/ipv4/tcp_input.c

@@ -2103,7 +2103,7 @@ static __inline__ int tcp_fast_parse_options(struct sk_buff *skb, struct tcphdr
 	} else if (tp->tstamp_ok &&
 		   th->doff == (sizeof(struct tcphdr)>>2)+(TCPOLEN_TSTAMP_ALIGNED>>2)) {
 		__u32 *ptr = (__u32 *)(th + 1);
-		if (*ptr == __constant_ntohl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16)
+		if (*ptr == ntohl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16)
 				  | (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) {
 			tp->saw_tstamp = 1;
 			++ptr;
@@ -3275,7 +3275,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
 			__u32 *ptr = (__u32 *)(th + 1);
 
 			/* No? Slow path! */
-			if (*ptr != __constant_ntohl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16)
+			if (*ptr != ntohl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16)
 					  | (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP))
 				goto slow_path;
 

net/ipv6/addrconf.c

@@ -144,47 +144,47 @@ int ipv6_addr_type(struct in6_addr *addr)
 	/* Consider all addresses with the first three bits different of
 	   000 and 111 as unicasts.
 	 */
-	if ((st & __constant_htonl(0xE0000000)) != __constant_htonl(0x00000000) &&
-	    (st & __constant_htonl(0xE0000000)) != __constant_htonl(0xE0000000))
+	if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
+	    (st & htonl(0xE0000000)) != htonl(0xE0000000))
 		return IPV6_ADDR_UNICAST;
 
-	if ((st & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000)) {
+	if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
 		int type = IPV6_ADDR_MULTICAST;
 
-		switch((st & __constant_htonl(0x00FF0000))) {
-			case __constant_htonl(0x00010000):
+		switch((st & htonl(0x00FF0000))) {
+			case htonl(0x00010000):
 				type |= IPV6_ADDR_LOOPBACK;
 				break;
 
-			case __constant_htonl(0x00020000):
+			case htonl(0x00020000):
 				type |= IPV6_ADDR_LINKLOCAL;
 				break;
 
-			case __constant_htonl(0x00050000):
+			case htonl(0x00050000):
 				type |= IPV6_ADDR_SITELOCAL;
 				break;
 		};
 		return type;
 	}
 	
-	if ((st & __constant_htonl(0xFFC00000)) == __constant_htonl(0xFE800000))
+	if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
 		return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST);
 
-	if ((st & __constant_htonl(0xFFC00000)) == __constant_htonl(0xFEC00000))
+	if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
 		return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST);
 
 	if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
 		if (addr->s6_addr32[2] == 0) {
-			if (addr->in6_u.u6_addr32[3] == 0)
+			if (addr->s6_addr32[3] == 0)
 				return IPV6_ADDR_ANY;
 
-			if (addr->s6_addr32[3] == __constant_htonl(0x00000001))
+			if (addr->s6_addr32[3] == htonl(0x00000001))
 				return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST);
 
 			return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST);
 		}
 
-		if (addr->s6_addr32[2] == __constant_htonl(0x0000ffff))
+		if (addr->s6_addr32[2] == htonl(0x0000ffff))
 			return IPV6_ADDR_MAPPED;
 	}
 
@@ -755,7 +755,7 @@ static void addrconf_add_mroute(struct net_device *dev)
 
 	memset(&rtmsg, 0, sizeof(rtmsg));
 	ipv6_addr_set(&rtmsg.rtmsg_dst,
-		      __constant_htonl(0xFF000000), 0, 0, 0);
+		      htonl(0xFF000000), 0, 0, 0);
 	rtmsg.rtmsg_dst_len = 8;
 	rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
 	rtmsg.rtmsg_ifindex = dev->ifindex;
@@ -785,7 +785,7 @@ static void addrconf_add_lroute(struct net_device *dev)
 {
 	struct in6_addr addr;
 
-	ipv6_addr_set(&addr,  __constant_htonl(0xFE800000), 0, 0, 0);
+	ipv6_addr_set(&addr,  htonl(0xFE800000), 0, 0, 0);
 	addrconf_prefix_route(&addr, 10, dev, 0, RTF_ADDRCONF);
 }
 
@@ -1123,7 +1123,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
 	memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
 
 	if (idev->dev->flags&IFF_POINTOPOINT) {
-		addr.s6_addr32[0] = __constant_htonl(0xfe800000);
+		addr.s6_addr32[0] = htonl(0xfe800000);
 		scope = IFA_LINK;
 	} else {
 		scope = IPV6_ADDR_COMPATv4;
@@ -1237,9 +1237,7 @@ static void addrconf_dev_config(struct net_device *dev)
 		return;
 
 	memset(&addr, 0, sizeof(struct in6_addr));
-
-	addr.s6_addr[0] = 0xFE;
-	addr.s6_addr[1] = 0x80;
+	addr.s6_addr32[0] = htonl(0xFE800000);
 
 	if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
 		addrconf_add_linklocal(idev, &addr);

net/ipv6/datagram.c

@@ -150,7 +150,7 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
 			}
 		} else {
 			ipv6_addr_set(&sin->sin6_addr, 0, 0,
-				      __constant_htonl(0xffff),
+				      htonl(0xffff),
 				      *(u32*)(skb->nh.raw + serr->addr_offset));
 		}
 	}
@@ -173,7 +173,7 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
 			struct inet_opt *inet = inet_sk(sk);
 
 			ipv6_addr_set(&sin->sin6_addr, 0, 0,
-				      __constant_htonl(0xffff),
+				      htonl(0xffff),
 				      skb->nh.iph->saddr);
 			if (inet->cmsg_flags)
 				ip_cmsg_recv(msg, skb);

net/ipv6/icmp.c

@@ -198,7 +198,7 @@ static int is_ineligible(struct sk_buff *skb)
 		u8 type;
 		if (skb_copy_bits(skb, ptr+offsetof(struct icmp6hdr, icmp6_type),
 				  &type, 1)
-		    || !(type & 0x80))
+		    || !(type & ICMPV6_INFOMSG_MASK))
 			return 1;
 	}
 	return 0;
@@ -216,7 +216,7 @@ static inline int icmpv6_xrlim_allow(struct sock *sk, int type,
 	int res = 0;
 
 	/* Informational messages are not limited. */
-	if (type & 0x80)
+	if (type & ICMPV6_INFOMSG_MASK)
 		return 1;
 
 	/* Do not limit pmtu discovery, it would break it. */
@@ -519,22 +519,22 @@ static int icmpv6_rcv(struct sk_buff *skb)
 				    skb_checksum(skb, 0, skb->len, 0))) {
 			if (net_ratelimit())
 				printk(KERN_DEBUG "ICMPv6 checksum failed [%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x > %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x]\n",
-				       ntohs(saddr->in6_u.u6_addr16[0]),
-				       ntohs(saddr->in6_u.u6_addr16[1]),
-				       ntohs(saddr->in6_u.u6_addr16[2]),
-				       ntohs(saddr->in6_u.u6_addr16[3]),
-				       ntohs(saddr->in6_u.u6_addr16[4]),
-				       ntohs(saddr->in6_u.u6_addr16[5]),
-				       ntohs(saddr->in6_u.u6_addr16[6]),
-				       ntohs(saddr->in6_u.u6_addr16[7]),
-				       ntohs(daddr->in6_u.u6_addr16[0]),
-				       ntohs(daddr->in6_u.u6_addr16[1]),
-				       ntohs(daddr->in6_u.u6_addr16[2]),
-				       ntohs(daddr->in6_u.u6_addr16[3]),
-				       ntohs(daddr->in6_u.u6_addr16[4]),
-				       ntohs(daddr->in6_u.u6_addr16[5]),
-				       ntohs(daddr->in6_u.u6_addr16[6]),
-				       ntohs(daddr->in6_u.u6_addr16[7]));
+				       ntohs(saddr->s6_addr16[0]),
+				       ntohs(saddr->s6_addr16[1]),
+				       ntohs(saddr->s6_addr16[2]),
+				       ntohs(saddr->s6_addr16[3]),
+				       ntohs(saddr->s6_addr16[4]),
+				       ntohs(saddr->s6_addr16[5]),
+				       ntohs(saddr->s6_addr16[6]),
+				       ntohs(saddr->s6_addr16[7]),
+				       ntohs(daddr->s6_addr16[0]),
+				       ntohs(daddr->s6_addr16[1]),
+				       ntohs(daddr->s6_addr16[2]),
+				       ntohs(daddr->s6_addr16[3]),
+				       ntohs(daddr->s6_addr16[4]),
+				       ntohs(daddr->s6_addr16[5]),
+				       ntohs(daddr->s6_addr16[6]),
+				       ntohs(daddr->s6_addr16[7]));
 			goto discard_it;
 		}
 	}
@@ -613,7 +613,7 @@ static int icmpv6_rcv(struct sk_buff *skb)
 			printk(KERN_DEBUG "icmpv6: msg of unkown type\n");
 
 		/* informational */
-		if (type & 0x80)
+		if (type & ICMPV6_INFOMSG_MASK)
 			break;
 
 		/* 

net/ipv6/ip6_output.c

@@ -102,7 +102,7 @@ int ip6_output(struct sk_buff *skb)
 	struct dst_entry *dst = skb->dst;
 	struct net_device *dev = dst->dev;
 
-	skb->protocol = __constant_htons(ETH_P_IPV6);
+	skb->protocol = htons(ETH_P_IPV6);
 	skb->dev = dev;
 
 	if (ipv6_addr_is_multicast(&skb->nh.ipv6h->daddr)) {
@@ -223,7 +223,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
 	 *	Fill in the IPv6 header
 	 */
 
-	*(u32*)hdr = __constant_htonl(0x60000000) | fl->fl6_flowlabel;
+	*(u32*)hdr = htonl(0x60000000) | fl->fl6_flowlabel;
 	hlimit = -1;
 	if (np)
 		hlimit = np->hop_limit;
@@ -264,7 +264,7 @@ int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, struct net_device *dev,
 	struct ipv6hdr *hdr;
 	int totlen;
 
-	skb->protocol = __constant_htons(ETH_P_IPV6);
+	skb->protocol = htons(ETH_P_IPV6);
 	skb->dev = dev;
 
 	totlen = len + sizeof(struct ipv6hdr);

net/ipv6/netfilter/ip6_queue.c

@@ -408,14 +408,8 @@ ipq_mangle_ipv6(ipq_verdict_msg_t *v, struct ipq_queue_entry *e)
 	 */
 	if (e->info->hook == NF_IP_LOCAL_OUT) {
 		struct ipv6hdr *iph = e->skb->nh.ipv6h;
-		if (!(   iph->daddr.in6_u.u6_addr32[0] == e->rt_info.daddr.in6_u.u6_addr32[0]
-                      && iph->daddr.in6_u.u6_addr32[1] == e->rt_info.daddr.in6_u.u6_addr32[1]
-                      && iph->daddr.in6_u.u6_addr32[2] == e->rt_info.daddr.in6_u.u6_addr32[2]
-                      && iph->daddr.in6_u.u6_addr32[3] == e->rt_info.daddr.in6_u.u6_addr32[3]
-		      && iph->saddr.in6_u.u6_addr32[0] == e->rt_info.saddr.in6_u.u6_addr32[0]
-		      && iph->saddr.in6_u.u6_addr32[1] == e->rt_info.saddr.in6_u.u6_addr32[1]
-		      && iph->saddr.in6_u.u6_addr32[2] == e->rt_info.saddr.in6_u.u6_addr32[2]
-		      && iph->saddr.in6_u.u6_addr32[3] == e->rt_info.saddr.in6_u.u6_addr32[3]))
+		if (ipv6_addr_cmp(&iph->daddr, &e->rt_info.daddr) ||
+		    ipv6_addr_cmp(&iph->saddr, &e->rt_info.saddr))
 			return route6_me_harder(e->skb);
 	}
 	return 0;

net/ipv6/netfilter/ip6t_LOG.c

@@ -112,7 +112,7 @@ static void dump_packet(const struct ip6t_log_info *info,
 			printk("FRAG:%u ", ntohs(fhdr->frag_off) & 0xFFF8);
 
 			/* Max length: 11 "INCOMPLETE " */
-			if (fhdr->frag_off & __constant_htons(0x0001))
+			if (fhdr->frag_off & htons(0x0001))
 				printk("INCOMPLETE ");
 
 			printk("ID:%08x ", fhdr->identification);

net/ipv6/reassembly.c

@@ -372,7 +372,7 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
  				     csum_partial(skb->nh.raw, (u8*)(fhdr+1)-skb->nh.raw, 0));
 
 	/* Is this the final fragment? */
-	if (!(fhdr->frag_off & __constant_htons(0x0001))) {
+	if (!(fhdr->frag_off & htons(0x0001))) {
 		/* If we already have some bits beyond end
 		 * or have different end, the segment is corrupted.
 		 */
@@ -648,7 +648,7 @@ int ipv6_reassembly(struct sk_buff **skbp, int nhoff)
 	hdr = skb->nh.ipv6h;
 	fhdr = (struct frag_hdr *)skb->h.raw;
 
-	if (!(fhdr->frag_off & __constant_htons(0xFFF9))) {
+	if (!(fhdr->frag_off & htons(0xFFF9))) {
 		/* It is not a fragmented frame */
 		skb->h.raw += sizeof(struct frag_hdr);
 		IP6_INC_STATS_BH(Ip6ReasmOKs);

net/ipv6/sit.c

@@ -396,7 +396,7 @@ static int ipip6_rcv(struct sk_buff *skb)
 		skb->mac.raw = skb->nh.raw;
 		skb->nh.raw = skb->data;
 		memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
-		skb->protocol = __constant_htons(ETH_P_IPV6);
+		skb->protocol = htons(ETH_P_IPV6);
 		skb->pkt_type = PACKET_HOST;
 		tunnel->stat.rx_packets++;
 		tunnel->stat.rx_bytes += skb->len;
@@ -470,7 +470,7 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 		goto tx_error;
 	}
 
-	if (skb->protocol != __constant_htons(ETH_P_IPV6))
+	if (skb->protocol != htons(ETH_P_IPV6))
 		goto tx_error;
 
 	if (!dst)
@@ -588,7 +588,7 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	iph->version		=	4;
 	iph->ihl		=	sizeof(struct iphdr)>>2;
 	if (mtu > IPV6_MIN_MTU)
-		iph->frag_off	=	__constant_htons(IP_DF);
+		iph->frag_off	=	htons(IP_DF);
 	else
 		iph->frag_off	=	0;
 
@@ -659,10 +659,10 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
 
 		err = -EINVAL;
 		if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPV6 ||
-		    p.iph.ihl != 5 || (p.iph.frag_off&__constant_htons(~IP_DF)))
+		    p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF)))
 			goto done;
 		if (p.iph.ttl)
-			p.iph.frag_off |= __constant_htons(IP_DF);
+			p.iph.frag_off |= htons(IP_DF);
 
 		t = ipip6_tunnel_locate(&p, cmd == SIOCADDTUNNEL);
 

net/ipv6/udp.c

@@ -424,11 +424,11 @@ static int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, int len,
 		sin6->sin6_flowinfo = 0;
 		sin6->sin6_scope_id = 0;
 
-		if (skb->protocol == __constant_htons(ETH_P_IP)) {
+		if (skb->protocol == htons(ETH_P_IP)) {
 			struct inet_opt *inet = inet_sk(sk);
 
 			ipv6_addr_set(&sin6->sin6_addr, 0, 0,
-				      __constant_htonl(0xffff), skb->nh.iph->saddr);
+				      htonl(0xffff), skb->nh.iph->saddr);
 			if (inet->cmsg_flags)
 				ip_cmsg_recv(msg, skb);
 		} else {