Beispiel #1
0
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
}
Beispiel #2
0
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
}