diff options
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/bpf/xdp_redirect_cpu_kern.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/samples/bpf/xdp_redirect_cpu_kern.c b/samples/bpf/xdp_redirect_cpu_kern.c index 303e9e7161f3..8cb703671b04 100644 --- a/samples/bpf/xdp_redirect_cpu_kern.c +++ b/samples/bpf/xdp_redirect_cpu_kern.c @@ -134,7 +134,16 @@ bool parse_eth(struct ethhdr *eth, void *data_end, return false; eth_type = vlan_hdr->h_vlan_encapsulated_proto; } - /* TODO: Handle double VLAN tagged packet */ + /* Handle double VLAN tagged packet */ + if (eth_type == htons(ETH_P_8021Q) || eth_type == htons(ETH_P_8021AD)) { + struct vlan_hdr *vlan_hdr; + + vlan_hdr = (void *)eth + offset; + offset += sizeof(*vlan_hdr); + if ((void *)eth + offset > data_end) + return false; + eth_type = vlan_hdr->h_vlan_encapsulated_proto; + } *eth_proto = ntohs(eth_type); *l3_offset = offset; |