13 int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)  in ip_route_me_harder()  argument
15 	struct net *net = dev_net(skb->dst->dev);  in ip_route_me_harder()
16 	const struct iphdr *iph = ip_hdr(skb);  in ip_route_me_harder()
24 	if (skb->sk && inet_sk(skb->sk)->transparent)  in ip_route_me_harder()
37 		fl.oif = skb->sk ? skb->sk->sk_bound_dev_if : 0;  in ip_route_me_harder()
38 		fl.mark = skb->mark;  in ip_route_me_harder()
39 		fl.flags = skb->sk ? inet_sk_flowi_flags(skb->sk) : 0;  in ip_route_me_harder()
44 		dst_release(skb->dst);  in ip_route_me_harder()
45 		skb->dst = &rt->u.dst;  in ip_route_me_harder()
53 		odst = skb->dst;  in ip_route_me_harder()
54 		if (ip_route_input(skb, iph->daddr, iph->saddr,  in ip_route_me_harder()
63 	if (skb->dst->error)  in ip_route_me_harder()
67 	if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&  in ip_route_me_harder()
68 	    xfrm_decode_session(skb, &fl, AF_INET) == 0)  in ip_route_me_harder()
69 		if (xfrm_lookup(net, &skb->dst, &fl, skb->sk, 0))  in ip_route_me_harder()
74 	hh_len = skb->dst->dev->hard_header_len;  in ip_route_me_harder()
75 	if (skb_headroom(skb) < hh_len &&  in ip_route_me_harder()
76 	    pskb_expand_head(skb, hh_len - skb_headroom(skb), 0, GFP_ATOMIC))  in ip_route_me_harder()
84 int ip_xfrm_me_harder(struct sk_buff *skb)  in ip_xfrm_me_harder()  argument
90 	if (IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED)  in ip_xfrm_me_harder()
92 	if (xfrm_decode_session(skb, &fl, AF_INET) < 0)  in ip_xfrm_me_harder()
95 	dst = skb->dst;  in ip_xfrm_me_harder()
100 	if (xfrm_lookup(dev_net(dst->dev), &dst, &fl, skb->sk, 0) < 0)  in ip_xfrm_me_harder()
103 	dst_release(skb->dst);  in ip_xfrm_me_harder()
104 	skb->dst = dst;  in ip_xfrm_me_harder()
107 	hh_len = skb->dst->dev->hard_header_len;  in ip_xfrm_me_harder()
108 	if (skb_headroom(skb) < hh_len &&  in ip_xfrm_me_harder()
109 	    pskb_expand_head(skb, hh_len - skb_headroom(skb), 0, GFP_ATOMIC))  in ip_xfrm_me_harder()
131 static void nf_ip_saveroute(const struct sk_buff *skb,  in nf_ip_saveroute()  argument
137 		const struct iphdr *iph = ip_hdr(skb);  in nf_ip_saveroute()
142 		rt_info->mark = skb->mark;  in nf_ip_saveroute()
146 static int nf_ip_reroute(struct sk_buff *skb,  in nf_ip_reroute()  argument
152 		const struct iphdr *iph = ip_hdr(skb);  in nf_ip_reroute()
155 		      && skb->mark == rt_info->mark  in nf_ip_reroute()
158 			return ip_route_me_harder(skb, RTN_UNSPEC);  in nf_ip_reroute()
163 __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,  in nf_ip_checksum()  argument
166 	const struct iphdr *iph = ip_hdr(skb);  in nf_ip_checksum()
169 	switch (skb->ip_summed) {  in nf_ip_checksum()
173 		if ((protocol == 0 && !csum_fold(skb->csum)) ||  in nf_ip_checksum()
175 				       skb->len - dataoff, protocol,  in nf_ip_checksum()
176 				       skb->csum)) {  in nf_ip_checksum()
177 			skb->ip_summed = CHECKSUM_UNNECESSARY;  in nf_ip_checksum()
183 			skb->csum = 0;  in nf_ip_checksum()
185 			skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,  in nf_ip_checksum()
186 						       skb->len - dataoff,  in nf_ip_checksum()
188 		csum = __skb_checksum_complete(skb);  in nf_ip_checksum()
194 static __sum16 nf_ip_checksum_partial(struct sk_buff *skb, unsigned int hook,  in nf_ip_checksum_partial()  argument
198 	const struct iphdr *iph = ip_hdr(skb);  in nf_ip_checksum_partial()
201 	switch (skb->ip_summed) {  in nf_ip_checksum_partial()
203 		if (len == skb->len - dataoff)  in nf_ip_checksum_partial()
204 			return nf_ip_checksum(skb, hook, dataoff, protocol);  in nf_ip_checksum_partial()
207 		skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr, protocol,  in nf_ip_checksum_partial()
208 					       skb->len - dataoff, 0);  in nf_ip_checksum_partial()
209 		skb->ip_summed = CHECKSUM_NONE;  in nf_ip_checksum_partial()
210 		csum = __skb_checksum_complete_head(skb, dataoff + len);  in nf_ip_checksum_partial()
212 			skb->ip_summed = CHECKSUM_UNNECESSARY;  in nf_ip_checksum_partial()