tests/jit/test3.dp

// test for packet modification

@1.0.0
#name 'classifier'
#packed 'false'

struct IPKey {
  dip:32
  sip:32
}
struct IPLeaf {
  xdip:32
  xsip:32
  xlated_pkts:64
}
Table<IPKey, IPLeaf, FIXED_MATCH, LRU> xlate(1024)

var ret:32 = 1

var orig_dip:32 = 0
var orig_sip:32 = 0
var IPLeaf *xleaf;

state INIT {
  goto proto::ethernet
}

state proto::ethernet {
}

state proto::dot1q {
}

state proto::ip {
  orig_dip = $ip.dst
  orig_sip = $ip.src
  var IPKey key{dip=orig_dip, sip=orig_sip}
  xlate.lookup(key, xleaf) {}
  on_valid(xleaf) {
    incr_cksum(@ip.hchecksum, orig_dip, xleaf.xdip)
    incr_cksum(@ip.hchecksum, orig_sip, xleaf.xsip)
    pkt.rewrite_field($ip.dst, xleaf.xdip)
    pkt.rewrite_field($ip.src, xleaf.xsip)
    atomic_add(xleaf.xlated_pkts, 1)
  }
}

state proto::udp {
  on_valid(xleaf) {
    incr_cksum(@udp.crc, orig_dip, xleaf.xdip, 1)
    incr_cksum(@udp.crc, orig_sip, xleaf.xsip, 1)
  }
}

state proto::tcp {
  on_valid(xleaf) {
    incr_cksum(@tcp.cksum, orig_dip, xleaf.xdip, 1)
    incr_cksum(@tcp.cksum, orig_sip, xleaf.xsip, 1)
  }
}

state proto::vxlan {
}

state proto::gre {
}

state EOP {
  return ret
}