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// 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;
}
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