271 static ret_t accept_locally(struct __sk_buff *skb, encap_headers_t *encap)  in accept_locally()  argument
274 		sizeof(*encap) +  in accept_locally()
275 		sizeof(struct in_addr) * encap->unigue.hop_count;  in accept_locally()
279 	if (encap->gue.proto_ctype == IPPROTO_IPV6)  in accept_locally()
280 		encap->eth.h_proto = bpf_htons(ETH_P_IPV6);  in accept_locally()
292 			      encap_headers_t *encap, struct in_addr *next_hop,  in forward_with_gre()  argument
296 		sizeof(*encap) +  in forward_with_gre()
297 		sizeof(struct in_addr) * encap->unigue.hop_count;  in forward_with_gre()
314 	if (encap->gue.proto_ctype == IPPROTO_IPV6) {  in forward_with_gre()
419 				 encap_headers_t *encap, struct in_addr *next_hop,  in forward_to_next_hop()  argument
428 	memcpy(temp, encap->eth.h_dest, sizeof(temp));  in forward_to_next_hop()
429 	memcpy(encap->eth.h_dest, encap->eth.h_source,  in forward_to_next_hop()
430 	       sizeof(encap->eth.h_dest));  in forward_to_next_hop()
431 	memcpy(encap->eth.h_source, temp, sizeof(encap->eth.h_source));  in forward_to_next_hop()
433 	if (encap->unigue.next_hop == encap->unigue.hop_count - 1 &&  in forward_to_next_hop()
434 	    encap->unigue.last_hop_gre) {  in forward_to_next_hop()
435 		return forward_with_gre(skb, dynptr, encap, next_hop, metrics);  in forward_to_next_hop()
439 	uint32_t old_saddr = encap->ip.saddr;  in forward_to_next_hop()
440 	encap->ip.saddr = encap->ip.daddr;  in forward_to_next_hop()
441 	encap->ip.daddr = next_hop->s_addr;  in forward_to_next_hop()
442 	if (encap->unigue.next_hop < encap->unigue.hop_count) {  in forward_to_next_hop()
443 		encap->unigue.next_hop++;  in forward_to_next_hop()
447 	const uint64_t off = offsetof(typeof(*encap), ip.check);  in forward_to_next_hop()
475 static ret_t get_next_hop(struct bpf_dynptr *dynptr, __u64 *offset, encap_headers_t *encap,  in get_next_hop()  argument
478 	if (encap->unigue.next_hop > encap->unigue.hop_count)  in get_next_hop()
482 	MAYBE_RETURN(skip_next_hops(offset, encap->unigue.next_hop));  in get_next_hop()
484 	if (encap->unigue.next_hop == encap->unigue.hop_count) {  in get_next_hop()
496 	return skip_next_hops(offset, encap->unigue.hop_count - encap->unigue.next_hop - 1);  in get_next_hop()
858 	encap_headers_t *encap;  in cls_redirect()  local
863 	if (bpf_skb_pull_data(skb, sizeof(*encap)))  in cls_redirect()
866 	encap = bpf_dynptr_slice_rdwr(&dynptr, 0, encap_buffer, sizeof(encap_buffer));  in cls_redirect()
867 	if (!encap)  in cls_redirect()
870 	off += sizeof(*encap);  in cls_redirect()
872 	if (encap->ip.ihl != 5)  in cls_redirect()
876 	if (encap->ip.daddr != ENCAPSULATION_IP ||  in cls_redirect()
877 	    encap->ip.protocol != IPPROTO_UDP)  in cls_redirect()
881 	if (encap->udp.dest != ENCAPSULATION_PORT)  in cls_redirect()
887 	if (ipv4_is_fragment((void *)&encap->ip)) {  in cls_redirect()
892 	if (encap->gue.variant != 0) {  in cls_redirect()
897 	if (encap->gue.control != 0) {  in cls_redirect()
902 	if (encap->gue.flags != 0) {  in cls_redirect()
907 	if (encap->gue.hlen !=  in cls_redirect()
908 	    sizeof(encap->unigue) / 4 + encap->unigue.hop_count) {  in cls_redirect()
913 	if (encap->unigue.version != 0) {  in cls_redirect()
918 	if (encap->unigue.reserved != 0)  in cls_redirect()
921 	MAYBE_RETURN(get_next_hop(&dynptr, &off, encap, &next_hop));  in cls_redirect()
925 		return accept_locally(skb, encap);  in cls_redirect()
929 	switch (encap->gue.proto_ctype) {  in cls_redirect()
949 		return forward_to_next_hop(skb, &dynptr, encap, &next_hop, metrics);  in cls_redirect()
956 		if (encap->unigue.forward_syn) {  in cls_redirect()
957 			return forward_to_next_hop(skb, &dynptr, encap, &next_hop,  in cls_redirect()
973 	ret = accept_locally(skb, encap);  in cls_redirect()
975 	if (encap == encap_buffer)  in cls_redirect()