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