func (d *of10Driver) nomMatch(m of10.Match) (nom.Match, error) {
nm := nom.Match{}
wc := of10.FlowWildcards(m.Wildcards())
if wc&of10.PFW_IN_PORT == 0 {
ofp := m.InPort()
nomp, ok := d.ofPorts[ofp]
if !ok {
return nom.Match{}, fmt.Errorf("of10Driver: cannot find port %v", ofp)
}
nm.AddField(nom.InPort(nomp.UID()))
}
if wc&of10.PFW_DL_SRC == 0 {
nm.AddField(nom.EthSrc{
Addr: m.DlSrc(),
Mask: nom.MaskNoneMAC,
})
}
if wc&of10.PFW_DL_DST == 0 {
nm.AddField(nom.EthDst{
Addr: m.DlDst(),
Mask: nom.MaskNoneMAC,
})
}
if wc&of10.PFW_DL_TYPE == 0 {
nm.AddField(nom.EthType(m.DlType()))
}
if wc&of10.PFW_NW_SRC_MASK != of10.PFW_NW_SRC_ALL && m.NwSrc() != 0 {
mask := uint(wc&of10.PFW_NW_SRC_MASK) >> uint(of10.PFW_NW_SRC_SHIFT)
nm.AddField(nom.IPv4Src(nom.CIDRToMaskedIPv4(m.NwSrc(), mask)))
}
if wc&of10.PFW_NW_DST_MASK != of10.PFW_NW_DST_ALL && m.NwDst() != 0 {
mask := uint(wc&of10.PFW_NW_DST_MASK) >> uint(of10.PFW_NW_DST_SHIFT)
nm.AddField(nom.IPv4Dst(nom.CIDRToMaskedIPv4(m.NwDst(), mask)))
}
if wc&of10.PFW_TP_SRC == 0 {
nm.AddField(nom.TransportPortSrc(m.TpSrc()))
}
if wc&of10.PFW_TP_DST == 0 {
nm.AddField(nom.TransportPortDst(m.TpDst()))
}
return nm, nil
}
func (d *of10Driver) ofMatch(m nom.Match) (of10.Match, error) {
ofm := of10.NewMatch()
w := of10.PFW_ALL
for _, f := range m.Fields {
switch f := f.(type) {
case nom.InPort:
p, ok := d.nomPorts[nom.UID(f)]
if !ok {
return of10.Match{}, fmt.Errorf("of10Driver: nom port not found %v", f)
}
ofm.SetInPort(p)
w &= ^of10.PFW_IN_PORT
case nom.EthDst:
if f.Mask != nom.MaskNoneMAC {
return of10.Match{},
fmt.Errorf("of10Driver: masked ethernet address is not supported")
}
ofm.SetDlDst([6]byte(f.Addr))
w &= ^of10.PFW_DL_DST
case nom.EthSrc:
if f.Mask != nom.MaskNoneMAC {
return of10.Match{},
fmt.Errorf("of10Driver: masked ethernet address is not supported")
}
ofm.SetDlSrc([6]byte(f.Addr))
w &= ^of10.PFW_DL_SRC
case nom.EthType:
ofm.SetDlType(uint16(f))
w &= ^of10.PFW_DL_TYPE
case nom.IPv4Src:
w &= ^of10.PFW_NW_SRC_MASK
ofm.SetNwSrc(f.Addr.Uint())
mask := f.Mask.PopCount()
if mask == 32 {
w |= of10.PFW_NW_SRC_MASK
} else {
w |= of10.FlowWildcards(mask << uint(of10.PFW_NW_SRC_SHIFT))
}
case nom.IPv4Dst:
w &= ^of10.PFW_NW_DST_MASK
ofm.SetNwDst(f.Addr.Uint())
mask := f.Mask.PopCount()
if mask == 32 {
w |= of10.PFW_NW_DST_MASK
} else {
w |= of10.FlowWildcards(mask << uint(of10.PFW_NW_DST_SHIFT))
}
case nom.TransportPortSrc:
ofm.SetTpSrc(uint16(f))
w &= ^of10.PFW_TP_SRC
case nom.TransportPortDst:
ofm.SetTpDst(uint16(f))
w &= ^of10.PFW_TP_DST
case nom.IPv6Src, nom.IPv6Dst:
return of10.Match{}, fmt.Errorf("of10Driver: IPv6 not supported")
}
}
ofm.SetWildcards(uint32(w))
return ofm, nil
}