bpf/progs/test_cls_redirect_dynptr.c

511 static uint64_t fill_tuple(struct bpf_sock_tuple *tuple, void *iph,
517 		tuple->ipv4.daddr = ipv4->daddr;
518 		tuple->ipv4.saddr = ipv4->saddr;
519 		tuple->ipv4.sport = sport;
520 		tuple->ipv4.dport = dport;
521 		return sizeof(tuple->ipv4);
526 		memcpy(&tuple->ipv6.daddr, &ipv6->daddr,
527 		       sizeof(tuple->ipv6.daddr));
528 		memcpy(&tuple->ipv6.saddr, &ipv6->saddr,
529 		       sizeof(tuple->ipv6.saddr));
530 		tuple->ipv6.sport = sport;
531 		tuple->ipv6.dport = dport;
532 		return sizeof(tuple->ipv6);
540 static verdict_t classify_tcp(struct __sk_buff *skb, struct bpf_sock_tuple *tuple,
544 		bpf_skc_lookup_tcp(skb, tuple, tuplen, BPF_F_CURRENT_NETNS, 0);
558 		if (tuplen == sizeof(tuple->ipv6))
572 static verdict_t classify_udp(struct __sk_buff *skb, struct bpf_sock_tuple *tuple, uint64_t tuplen)
575 		bpf_sk_lookup_udp(skb, tuple, tuplen, BPF_F_CURRENT_NETNS, 0);
589 static verdict_t classify_icmp(struct __sk_buff *skb, uint8_t proto, struct bpf_sock_tuple *tuple,
594 		return classify_tcp(skb, tuple, tuplen, NULL, NULL);
597 		return classify_udp(skb, tuple, tuplen);
639 	 * the correct flow tuple.
641 	struct bpf_sock_tuple tuple;
642 	tuple.ipv4.saddr = ipv4.daddr;
643 	tuple.ipv4.daddr = ipv4.saddr;
645 	if (!pkt_parse_icmp_l4_ports(dynptr, offset, (flow_ports_t *)&tuple.ipv4.sport)) {
650 	return classify_icmp(skb, ipv4.protocol, &tuple,
651 			     sizeof(tuple.ipv4), metrics);
657 	struct bpf_sock_tuple tuple;
694 	memcpy(&tuple.ipv6.saddr, &ipv6.daddr, sizeof(tuple.ipv6.saddr));
695 	memcpy(&tuple.ipv6.daddr, &ipv6.saddr, sizeof(tuple.ipv6.daddr));
697 	if (!pkt_parse_icmp_l4_ports(dynptr, offset, (flow_ports_t *)&tuple.ipv6.sport)) {
702 	return classify_icmp(skb, l4_proto, &tuple, sizeof(tuple.ipv6),
709 	struct bpf_sock_tuple tuple;
725 	tuplen = fill_tuple(&tuple, info->hdr, info->len, tcp.source, tcp.dest);
726 	return classify_tcp(skb, &tuple, tuplen, info->hdr, &tcp);
732 	struct bpf_sock_tuple tuple;
744 	tuplen = fill_tuple(&tuple, info->hdr, info->len, udph.source, udph.dest);
745 	return classify_udp(skb, &tuple, tuplen);