1 // Copyright (c) PLUMgrid, Inc. 2 // Licensed under the Apache License, Version 2.0 (the "License") 3 struct IPKey { 4 u32 dip:32; 5 u32 sip:32; 6 }; 7 struct IPLeaf { 8 u32 rx_pkts:64; 9 u32 tx_pkts:64; 10 }; 11 Table<IPKey, IPLeaf, FIXED_MATCH, AUTO> stats(1024); 12 13 struct skbuff { 14 u32 type:32; 15 }; 16 17 u32 on_packet(struct skbuff *skb) { 18 u32 ret:32 = 0; 19 20 goto proto::ethernet; 21 22 state proto::ethernet { 23 } 24 25 state proto::dot1q { 26 } 27 28 state proto::ip { 29 u32 rx:32 = 0; 30 u32 tx:32 = 0; 31 u32 IPKey key; 32 if $ip.dst > $ip.src { 33 key.dip = $ip.dst; 34 key.sip = $ip.src; 35 rx = 1; 36 // test arbitrary return stmt 37 if false { 38 return 3; 39 } 40 } else { 41 key.dip = $ip.src; 42 key.sip = $ip.dst; 43 tx = 1; 44 ret = 1; 45 } 46 struct IPLeaf *leaf; 47 leaf = stats[key]; 48 on_valid(leaf) { 49 atomic_add(leaf.rx_pkts, rx); 50 atomic_add(leaf.tx_pkts, tx); 51 } 52 } 53 54 state proto::udp { 55 } 56 57 state proto::vxlan { 58 } 59 60 state proto::gre { 61 } 62 63 state EOP { 64 return ret; 65 } 66 } 67
