net/netfilter/nf_nat_proto.c

34 			   unsigned int iphdroff, __sum16 *check,
56 		nf_csum_update(skb, iphdroff, &hdr->check, tuple, maniptype);
57 		inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport,
59 		if (!hdr->check)
60 			hdr->check = CSUM_MANGLED_0;
76 	__udp_manip_pkt(skb, iphdroff, hdr, tuple, maniptype, !!hdr->check);
177 	nf_csum_update(skb, iphdroff, &hdr->check, tuple, maniptype);
178 	inet_proto_csum_replace2(&hdr->check, skb, oldport, newport, false);
372 		csum_replace4(&iph->check, iph->saddr, target->src.u3.ip);
375 		csum_replace4(&iph->check, iph->daddr, target->dst.u3.ip);
446 				    unsigned int iphdroff, __sum16 *check,
460 	inet_proto_csum_replace4(check, skb, oldip, newip, true);
464 				    unsigned int iphdroff, __sum16 *check,
479 	inet_proto_csum_replace16(check, skb, oldip->s6_addr32,
485 			   unsigned int iphdroff, __sum16 *check,
491 		nf_nat_ipv4_csum_update(skb, iphdroff, check, t, maniptype);
494 		nf_nat_ipv6_csum_update(skb, iphdroff, check, t, maniptype);
500 				    u8 proto, void *data, __sum16 *check,
509 		skb->csum_offset = (void *)check - data;
510 		*check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, datalen,
513 		inet_proto_csum_replace2(check, skb,
520 				    u8 proto, void *data, __sum16 *check,
529 		skb->csum_offset = (void *)check - data;
530 		*check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
533 		inet_proto_csum_replace2(check, skb,
540 			u8 nfproto, u8 proto, void *data, __sum16 *check,
545 		nf_nat_ipv4_csum_recalc(skb, proto, data, check,
550 		nf_nat_ipv6_csum_recalc(skb, proto, data, check,
738 	/* skb has a socket assigned via tcp edemux. We need to check