diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_tc_link.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_tc_link.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_tc_link.c b/tools/testing/selftests/bpf/progs/test_tc_link.c index 992400acb957..ab3eae3d6af8 100644 --- a/tools/testing/selftests/bpf/progs/test_tc_link.c +++ b/tools/testing/selftests/bpf/progs/test_tc_link.c @@ -4,7 +4,8 @@ #include <linux/bpf.h> #include <linux/if_ether.h> - +#include <linux/stddef.h> +#include <linux/if_packet.h> #include <bpf/bpf_endian.h> #include <bpf/bpf_helpers.h> @@ -16,7 +17,13 @@ bool seen_tc3; bool seen_tc4; bool seen_tc5; bool seen_tc6; +bool seen_tc7; + +bool set_type; + bool seen_eth; +bool seen_host; +bool seen_mcast; SEC("tc/ingress") int tc1(struct __sk_buff *skb) @@ -28,8 +35,16 @@ int tc1(struct __sk_buff *skb) if (bpf_skb_load_bytes(skb, 0, ð, sizeof(eth))) goto out; seen_eth = eth.h_proto == bpf_htons(ETH_P_IP); + seen_host = skb->pkt_type == PACKET_HOST; + if (seen_host && set_type) { + eth.h_dest[0] = 4; + if (bpf_skb_store_bytes(skb, 0, ð, sizeof(eth), 0)) + goto fail; + bpf_skb_change_type(skb, PACKET_MULTICAST); + } out: seen_tc1 = true; +fail: return TCX_NEXT; } @@ -67,3 +82,21 @@ int tc6(struct __sk_buff *skb) seen_tc6 = true; return TCX_PASS; } + +SEC("tc/ingress") +int tc7(struct __sk_buff *skb) +{ + struct ethhdr eth = {}; + + if (skb->protocol != __bpf_constant_htons(ETH_P_IP)) + goto out; + if (bpf_skb_load_bytes(skb, 0, ð, sizeof(eth))) + goto out; + if (eth.h_dest[0] == 4 && set_type) { + seen_mcast = skb->pkt_type == PACKET_MULTICAST; + bpf_skb_change_type(skb, PACKET_HOST); + } +out: + seen_tc7 = true; + return TCX_PASS; +} |