| // Copyright (c) PLUMgrid, Inc. |
| // Licensed under the Apache License, Version 2.0 (the "License") |
| #include <bcc/proto.h> |
| |
| // physical endpoint manager (pem) tables which connects VMs and bridges |
| // <ifindex_in, ifindex_out> |
| BPF_HASH(pem_dest, u32, u32, 256); |
| // <0, tx_pkts> |
| BPF_ARRAY(pem_stats, u32, 1); |
| |
| int pem(struct __sk_buff *skb) { |
| u32 ifindex_in, *ifindex_p; |
| u8 *cursor = 0; |
| struct ethernet_t *ethernet = cursor_advance(cursor, sizeof(*ethernet)); |
| |
| ifindex_in = skb->ingress_ifindex; |
| ifindex_p = pem_dest.lookup(&ifindex_in); |
| if (ifindex_p) { |
| #if 1 |
| if (ethernet->type == 0x0800 || ethernet->type == 0x0806) { |
| /* accumulate stats */ |
| u32 index = 0; |
| u32 *value = pem_stats.lookup(&index); |
| if (value) |
| lock_xadd(value, 1); |
| } |
| #endif |
| bpf_clone_redirect(skb, *ifindex_p, 0); |
| } |
| |
| return 1; |
| } |
