diff --git a/include/net/ip.h b/include/net/ip.h
index 50c8889..66d5161 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -102,6 +102,8 @@
 extern int		ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
 extern int		ip_do_nat(struct sk_buff *skb);
 extern void		ip_send_check(struct iphdr *ip);
+extern int		__ip_local_out(struct sk_buff *skb);
+extern int		ip_local_out(struct sk_buff *skb);
 extern int		ip_queue_xmit(struct sk_buff *skb, int ipfragok);
 extern void		ip_init(void);
 extern int		ip_append_data(struct sock *sk,
diff --git a/include/net/ipip.h b/include/net/ipip.h
index 7cdc914..549e132 100644
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -2,6 +2,7 @@
 #define __NET_IPIP_H 1
 
 #include <linux/if_tunnel.h>
+#include <net/ip.h>
 
 /* Keep error state on tunnel for 30 sec */
 #define IPTUNNEL_ERR_TIMEO	(30*HZ)
@@ -30,11 +31,9 @@
 	int pkt_len = skb->len;						\
 									\
 	skb->ip_summed = CHECKSUM_NONE;					\
-	iph->tot_len = htons(skb->len);					\
 	ip_select_ident(iph, &rt->u.dst, NULL);				\
-	ip_send_check(iph);						\
 									\
-	err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev, dst_output);\
+	err = ip_local_out(skb);					\
 	if (net_xmit_eval(err) == 0) {					\
 		stats->tx_bytes += pkt_len;				\
 		stats->tx_packets++;					\
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 7015585..c560a93 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -349,17 +349,12 @@
 
 static int igmpv3_sendpack(struct sk_buff *skb)
 {
-	struct iphdr *pip = ip_hdr(skb);
 	struct igmphdr *pig = igmp_hdr(skb);
-	const int iplen = skb->tail - skb->network_header;
 	const int igmplen = skb->tail - skb->transport_header;
 
-	pip->tot_len = htons(iplen);
-	ip_send_check(pip);
 	pig->csum = ip_compute_csum(igmp_hdr(skb), igmplen);
 
-	return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, skb->dev,
-		       dst_output);
+	return ip_local_out(skb);
 }
 
 static int grec_size(struct ip_mc_list *pmc, int type, int gdel, int sdel)
@@ -680,13 +675,11 @@
 	iph->daddr    = dst;
 	iph->saddr    = rt->rt_src;
 	iph->protocol = IPPROTO_IGMP;
-	iph->tot_len  = htons(IGMP_SIZE);
 	ip_select_ident(iph, &rt->u.dst, NULL);
 	((u8*)&iph[1])[0] = IPOPT_RA;
 	((u8*)&iph[1])[1] = 4;
 	((u8*)&iph[1])[2] = 0;
 	((u8*)&iph[1])[3] = 0;
-	ip_send_check(iph);
 
 	ih = (struct igmphdr *)skb_put(skb, sizeof(struct igmphdr));
 	ih->type=type;
@@ -695,8 +688,7 @@
 	ih->group=group;
 	ih->csum=ip_compute_csum((void *)ih, sizeof(struct igmphdr));
 
-	return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
-		       dst_output);
+	return ip_local_out(skb);
 }
 
 static void igmp_gq_timer_expire(unsigned long data)
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index bc9e575..03b9b06 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -91,6 +91,28 @@
 	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
 }
 
+int __ip_local_out(struct sk_buff *skb)
+{
+	struct iphdr *iph = ip_hdr(skb);
+
+	iph->tot_len = htons(skb->len);
+	ip_send_check(iph);
+	return nf_hook(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, skb->dst->dev,
+		       dst_output);
+}
+
+int ip_local_out(struct sk_buff *skb)
+{
+	int err;
+
+	err = __ip_local_out(skb);
+	if (likely(err == 1))
+		err = dst_output(skb);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(ip_local_out);
+
 /* dev_loopback_xmit for use with netfilter. */
 static int ip_dev_loopback_xmit(struct sk_buff *newskb)
 {
@@ -138,20 +160,17 @@
 	iph->daddr    = rt->rt_dst;
 	iph->saddr    = rt->rt_src;
 	iph->protocol = sk->sk_protocol;
-	iph->tot_len  = htons(skb->len);
 	ip_select_ident(iph, &rt->u.dst, sk);
 
 	if (opt && opt->optlen) {
 		iph->ihl += opt->optlen>>2;
 		ip_options_build(skb, opt, daddr, rt, 0);
 	}
-	ip_send_check(iph);
 
 	skb->priority = sk->sk_priority;
 
 	/* Send it out. */
-	return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
-		       dst_output);
+	return ip_local_out(skb);
 }
 
 EXPORT_SYMBOL_GPL(ip_build_and_send_pkt);
@@ -347,7 +366,6 @@
 	skb_reset_network_header(skb);
 	iph = ip_hdr(skb);
 	*((__be16 *)iph) = htons((4 << 12) | (5 << 8) | (inet->tos & 0xff));
-	iph->tot_len = htons(skb->len);
 	if (ip_dont_fragment(sk, &rt->u.dst) && !ipfragok)
 		iph->frag_off = htons(IP_DF);
 	else
@@ -366,13 +384,9 @@
 	ip_select_ident_more(iph, &rt->u.dst, sk,
 			     (skb_shinfo(skb)->gso_segs ?: 1) - 1);
 
-	/* Add an IP checksum. */
-	ip_send_check(iph);
-
 	skb->priority = sk->sk_priority;
 
-	return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
-		       dst_output);
+	return ip_local_out(skb);
 
 no_route:
 	IP_INC_STATS(IPSTATS_MIB_OUTNOROUTES);
@@ -1262,14 +1276,12 @@
 		ip_options_build(skb, opt, inet->cork.addr, rt, 0);
 	}
 	iph->tos = inet->tos;
-	iph->tot_len = htons(skb->len);
 	iph->frag_off = df;
 	ip_select_ident(iph, &rt->u.dst, sk);
 	iph->ttl = ttl;
 	iph->protocol = sk->sk_protocol;
 	iph->saddr = rt->rt_src;
 	iph->daddr = rt->rt_dst;
-	ip_send_check(iph);
 
 	skb->priority = sk->sk_priority;
 	skb->dst = dst_clone(&rt->u.dst);
@@ -1279,8 +1291,7 @@
 			skb_transport_header(skb))->type);
 
 	/* Netfilter gets whole the not fragmented skb. */
-	err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL,
-		      skb->dst->dev, dst_output);
+	err = ip_local_out(skb);
 	if (err) {
 		if (err > 0)
 			err = inet->recverr ? net_xmit_errno(err) : 0;
diff --git a/net/ipv4/ipvs/ip_vs_xmit.c b/net/ipv4/ipvs/ip_vs_xmit.c
index 7c074e3..66775ad 100644
--- a/net/ipv4/ipvs/ip_vs_xmit.c
+++ b/net/ipv4/ipvs/ip_vs_xmit.c
@@ -16,8 +16,8 @@
  */
 
 #include <linux/kernel.h>
-#include <linux/ip.h>
 #include <linux/tcp.h>                  /* for tcphdr */
+#include <net/ip.h>
 #include <net/tcp.h>                    /* for csum_tcpudp_magic */
 #include <net/udp.h>
 #include <net/icmp.h>                   /* for icmp_send */
@@ -406,14 +406,12 @@
 	iph->daddr		=	rt->rt_dst;
 	iph->saddr		=	rt->rt_src;
 	iph->ttl		=	old_iph->ttl;
-	iph->tot_len		=	htons(skb->len);
 	ip_select_ident(iph, &rt->u.dst, NULL);
-	ip_send_check(iph);
 
 	/* Another hack: avoid icmp_send in ip_fragment */
 	skb->local_df = 1;
 
-	IP_VS_XMIT(skb, rt);
+	ip_local_out(skb);
 
 	LeaveFunction(10);
 
diff --git a/net/ipv4/netfilter/ipt_REJECT.c b/net/ipv4/netfilter/ipt_REJECT.c
index dcf4d21..ccb2a03 100644
--- a/net/ipv4/netfilter/ipt_REJECT.c
+++ b/net/ipv4/netfilter/ipt_REJECT.c
@@ -90,7 +90,6 @@
 	/* Truncate to length (no data) */
 	tcph->doff = sizeof(struct tcphdr)/4;
 	skb_trim(nskb, ip_hdrlen(nskb) + sizeof(struct tcphdr));
-	niph->tot_len = htons(nskb->len);
 
 	if (tcph->ack) {
 		needs_ack = 0;
@@ -139,18 +138,13 @@
 	/* Adjust IP TTL */
 	niph->ttl = dst_metric(nskb->dst, RTAX_HOPLIMIT);
 
-	/* Adjust IP checksum */
-	niph->check = 0;
-	niph->check = ip_fast_csum(skb_network_header(nskb), niph->ihl);
-
 	/* "Never happens" */
 	if (nskb->len > dst_mtu(nskb->dst))
 		goto free_nskb;
 
 	nf_ct_attach(nskb, oldskb);
 
-	NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, nskb, NULL, nskb->dst->dev,
-		dst_output);
+	ip_local_out(nskb);
 	return;
 
  free_nskb:
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index 13fd113..0ffc3d0 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -69,17 +69,12 @@
 
 static inline int xfrm4_output_one(struct sk_buff *skb)
 {
-	struct iphdr *iph;
 	int err;
 
 	err = xfrm_output(skb);
 	if (err)
 		goto error_nolock;
 
-	iph = ip_hdr(skb);
-	iph->tot_len = htons(skb->len);
-	ip_send_check(iph);
-
 	IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED;
 	err = 0;
 
@@ -97,8 +92,7 @@
 	while (likely((err = xfrm4_output_one(skb)) == 0)) {
 		nf_reset(skb);
 
-		err = nf_hook(PF_INET, NF_IP_LOCAL_OUT, skb, NULL,
-			      skb->dst->dev, dst_output);
+		err = __ip_local_out(skb);
 		if (unlikely(err != 1))
 			break;