105 tcp_fast_csum_update(int af, struct tcphdr *tcph,  in tcp_fast_csum_update()  argument
112 		tcph->check =  in tcp_fast_csum_update()
115 						~csum_unfold(tcph->check))));  in tcp_fast_csum_update()
118 	tcph->check =  in tcp_fast_csum_update()
121 						~csum_unfold(tcph->check))));  in tcp_fast_csum_update()
126 tcp_partial_csum_update(int af, struct tcphdr *tcph,  in tcp_partial_csum_update()  argument
133 		tcph->check =  in tcp_partial_csum_update()
136 						csum_unfold(tcph->check))));  in tcp_partial_csum_update()
139 	tcph->check =  in tcp_partial_csum_update()
142 						csum_unfold(tcph->check))));  in tcp_partial_csum_update()
150 	struct tcphdr *tcph;  in tcp_snat_handler()  local
162 	if (skb_ensure_writable(skb, tcphoff + sizeof(*tcph)))  in tcp_snat_handler()
182 	tcph = (void *)skb_network_header(skb) + tcphoff;  in tcp_snat_handler()
183 	tcph->source = cp->vport;  in tcp_snat_handler()
187 		tcp_partial_csum_update(cp->af, tcph, &cp->daddr, &cp->vaddr,  in tcp_snat_handler()
192 		tcp_fast_csum_update(cp->af, tcph, &cp->daddr, &cp->vaddr,  in tcp_snat_handler()
199 		tcph->check = 0;  in tcp_snat_handler()
203 			tcph->check = csum_ipv6_magic(&cp->vaddr.in6,  in tcp_snat_handler()
209 			tcph->check = csum_tcpudp_magic(cp->vaddr.ip,  in tcp_snat_handler()
217 			  pp->name, tcph->check,  in tcp_snat_handler()
218 			  (char*)&(tcph->check) - (char*)tcph);  in tcp_snat_handler()
228 	struct tcphdr *tcph;  in tcp_dnat_handler()  local
240 	if (skb_ensure_writable(skb, tcphoff + sizeof(*tcph)))  in tcp_dnat_handler()
263 	tcph = (void *)skb_network_header(skb) + tcphoff;  in tcp_dnat_handler()
264 	tcph->dest = cp->dport;  in tcp_dnat_handler()
270 		tcp_partial_csum_update(cp->af, tcph, &cp->vaddr, &cp->daddr,  in tcp_dnat_handler()
275 		tcp_fast_csum_update(cp->af, tcph, &cp->vaddr, &cp->daddr,  in tcp_dnat_handler()
282 		tcph->check = 0;  in tcp_dnat_handler()
286 			tcph->check = csum_ipv6_magic(&cp->caddr.in6,  in tcp_dnat_handler()
292 			tcph->check = csum_tcpudp_magic(cp->caddr.ip,  in tcp_dnat_handler()