| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* Copyright (c) 2023 Isovalent */ |
| 3 | #include <stdbool.h> |
| 4 | |
| 5 | #include <linux/bpf.h> |
| 6 | #include <linux/if_ether.h> |
| 7 | |
| 8 | #include <bpf/bpf_endian.h> |
| 9 | #include <bpf/bpf_helpers.h> |
| 10 | |
| 11 | char LICENSE[] SEC("license") = "GPL"; |
| 12 | |
| 13 | bool seen_tc1; |
| 14 | bool seen_tc2; |
| 15 | bool seen_tc3; |
| 16 | bool seen_tc4; |
| 17 | bool seen_tc5; |
| 18 | bool seen_tc6; |
| 19 | bool seen_eth; |
| 20 | |
| 21 | SEC("tc/ingress") |
| 22 | int tc1(struct __sk_buff *skb) |
| 23 | { |
| 24 | struct ethhdr eth = {}; |
| 25 | |
| 26 | if (skb->protocol != __bpf_constant_htons(ETH_P_IP)) |
| 27 | goto out; |
| 28 | if (bpf_skb_load_bytes(skb, 0, ð, sizeof(eth))) |
| 29 | goto out; |
| 30 | seen_eth = eth.h_proto == bpf_htons(ETH_P_IP); |
| 31 | out: |
| 32 | seen_tc1 = true; |
| 33 | return TCX_NEXT; |
| 34 | } |
| 35 | |
| 36 | SEC("tc/egress") |
| 37 | int tc2(struct __sk_buff *skb) |
| 38 | { |
| 39 | seen_tc2 = true; |
| 40 | return TCX_NEXT; |
| 41 | } |
| 42 | |
| 43 | SEC("tc/egress") |
| 44 | int tc3(struct __sk_buff *skb) |
| 45 | { |
| 46 | seen_tc3 = true; |
| 47 | return TCX_NEXT; |
| 48 | } |
| 49 | |
| 50 | SEC("tc/egress") |
| 51 | int tc4(struct __sk_buff *skb) |
| 52 | { |
| 53 | seen_tc4 = true; |
| 54 | return TCX_NEXT; |
| 55 | } |
| 56 | |
| 57 | SEC("tc/egress") |
| 58 | int tc5(struct __sk_buff *skb) |
| 59 | { |
| 60 | seen_tc5 = true; |
| 61 | return TCX_PASS; |
| 62 | } |
| 63 | |
| 64 | SEC("tc/egress") |
| 65 | int tc6(struct __sk_buff *skb) |
| 66 | { |
| 67 | seen_tc6 = true; |
| 68 | return TCX_PASS; |
| 69 | } |
| 70 |