net/netfilter/nf_flow_table_ip.c

23 			       struct sk_buff *skb, unsigned int thoff)
30 	tcph = (void *)(skb_network_header(skb) + thoff);
39 static void nf_flow_nat_ip_tcp(struct sk_buff *skb, unsigned int thoff,
44 	tcph = (void *)(skb_network_header(skb) + thoff);
48 static void nf_flow_nat_ip_udp(struct sk_buff *skb, unsigned int thoff,
53 	udph = (void *)(skb_network_header(skb) + thoff);
63 				   unsigned int thoff, __be32 addr,
68 		nf_flow_nat_ip_tcp(skb, thoff, addr, new_addr);
71 		nf_flow_nat_ip_udp(skb, thoff, addr, new_addr);
78 			    unsigned int thoff, enum flow_offload_tuple_dir dir)
96 	nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
101 			    unsigned int thoff, enum flow_offload_tuple_dir dir)
119 	nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
123 			  unsigned int thoff, enum flow_offload_tuple_dir dir,
127 		nf_flow_snat_port(flow, skb, thoff, iph->protocol, dir);
128 		nf_flow_snat_ip(flow, skb, iph, thoff, dir);
131 		nf_flow_dnat_port(flow, skb, thoff, iph->protocol, dir);
132 		nf_flow_dnat_ip(flow, skb, iph, thoff, dir);
136 static bool ip_has_options(unsigned int thoff)
138 	return thoff != sizeof(struct iphdr);
177 	unsigned int thoff;
185 	thoff = (iph->ihl * 4);
188 	    unlikely(ip_has_options(thoff)))
191 	thoff += ctx->offset;
213 	if (!pskb_may_pull(skb, thoff + ctx->hdrsize))
219 		ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
226 		greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
370 	unsigned int thoff, mtu;
381 	thoff = (iph->ihl * 4) + ctx->offset;
382 	if (nf_flow_state_check(flow, iph->protocol, skb, thoff))
390 	if (skb_try_make_writable(skb, thoff + ctx->hdrsize))
396 	thoff -= ctx->offset;
399 	nf_flow_nat_ip(flow, skb, thoff, dir, iph);
472 static void nf_flow_nat_ipv6_tcp(struct sk_buff *skb, unsigned int thoff,
479 	tcph = (void *)(skb_network_header(skb) + thoff);
484 static void nf_flow_nat_ipv6_udp(struct sk_buff *skb, unsigned int thoff,
490 	udph = (void *)(skb_network_header(skb) + thoff);
500 				     unsigned int thoff, struct in6_addr *addr,
505 		nf_flow_nat_ipv6_tcp(skb, thoff, addr, new_addr, ip6h);
508 		nf_flow_nat_ipv6_udp(skb, thoff, addr, new_addr);
515 			      unsigned int thoff,
533 	nf_flow_nat_ipv6_l4proto(skb, ip6h, thoff, &addr, &new_addr);
538 			      unsigned int thoff,
556 	nf_flow_nat_ipv6_l4proto(skb, ip6h, thoff, &addr, &new_addr);
564 	unsigned int thoff = sizeof(*ip6h);
567 		nf_flow_snat_port(flow, skb, thoff, ip6h->nexthdr, dir);
568 		nf_flow_snat_ipv6(flow, skb, ip6h, thoff, dir);
571 		nf_flow_dnat_port(flow, skb, thoff, ip6h->nexthdr, dir);
572 		nf_flow_dnat_ipv6(flow, skb, ip6h, thoff, dir);
581 	unsigned int thoff;
584 	thoff = sizeof(*ip6h) + ctx->offset;
585 	if (!pskb_may_pull(skb, thoff))
610 	if (!pskb_may_pull(skb, thoff + ctx->hdrsize))
616 		ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
623 		greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
649 	unsigned int thoff, mtu;
660 	thoff = sizeof(*ip6h) + ctx->offset;
661 	if (nf_flow_state_check(flow, ip6h->nexthdr, skb, thoff))
669 	if (skb_try_make_writable(skb, thoff + ctx->hdrsize))