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/*
Copyright 2020 the original author or authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package openflow
import (
"context"
"encoding/binary"
"encoding/json"
"unsafe"
ofp "github.com/donNewtonAlpha/goloxi/of13"
"github.com/opencord/voltha-lib-go/v3/pkg/log"
"github.com/opencord/voltha-protos/v3/go/openflow_13"
"github.com/opencord/voltha-protos/v3/go/voltha"
)
var oxmMap = map[string]int32{
"in_port": 0,
"in_phy_port": 1,
"metadata": 2,
"eth_dst": 3,
"eth_src": 4,
"eth_type": 5,
"vlan_vid": 6,
"vlan_pcp": 7,
"ip_dscp": 8,
"ip_ecn": 9,
"ip_proto": 10,
"ipv4_src": 11,
"ipv4_dst": 12,
"tcp_src": 13,
"tcp_dst": 14,
"udp_src": 15,
"udp_dst": 16,
"sctp_src": 17,
"sctp_dst": 18,
"icmpv4_type": 19,
"icmpv4_code": 20,
"arp_op": 21,
"arp_spa": 22,
"arp_tpa": 23,
"arp_sha": 24,
"arp_tha": 25,
"ipv6_src": 26,
"ipv6_dst": 27,
"ipv6_flabel": 28,
"icmpv6_type": 29,
"icmpv6_code": 30,
"ipv6_nd_target": 31,
"ipv6_nd_sll": 32,
"ipv6_nd_tll": 33,
"mpls_label": 34,
"mpls_tc": 35,
"mpls_bos": 36,
"pbb_isid": 37,
"tunnel_id": 38,
"ipv6_exthdr": 39,
"vlan_vid_masked": 200, //made up
}
func (ofc *OFClient) handleFlowAdd(flowAdd *ofp.FlowAdd) {
if logger.V(log.DebugLevel) {
js, _ := json.Marshal(flowAdd)
logger.Debugw("handleFlowAdd called",
log.Fields{
"device-id": ofc.DeviceID,
"params": js})
}
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
logger.Errorw("no-voltha-connection",
log.Fields{"device-id": ofc.DeviceID})
return
}
// Construct the match
var oxmList []*voltha.OfpOxmField
for _, oxmField := range flowAdd.Match.GetOxmList() {
name := oxmMap[oxmField.GetOXMName()]
val := oxmField.GetOXMValue()
field := voltha.OfpOxmOfbField{Type: voltha.OxmOfbFieldTypes(name)}
ofpOxmField := voltha.OfpOxmField{
OxmClass: ofp.OFPXMCOpenflowBasic,
Field: &openflow_13.OfpOxmField_OfbField{OfbField: &field},
}
switch voltha.OxmOfbFieldTypes(name) {
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IN_PORT:
field.Value = &voltha.OfpOxmOfbField_Port{
Port: uint32(val.(ofp.Port)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IN_PHY_PORT:
field.Value = &voltha.OfpOxmOfbField_PhysicalPort{
PhysicalPort: val.(uint32),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_METADATA:
field.Value = &voltha.OfpOxmOfbField_TableMetadata{
TableMetadata: val.(uint64),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_ETH_TYPE:
field.Value = &voltha.OfpOxmOfbField_EthType{
EthType: uint32(val.(ofp.EthernetType)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IP_PROTO:
field.Value = &voltha.OfpOxmOfbField_IpProto{
IpProto: uint32(val.(ofp.IpPrototype)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_UDP_SRC:
field.Value = &voltha.OfpOxmOfbField_UdpSrc{
UdpSrc: uint32(val.(uint16)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_UDP_DST:
field.Value = &voltha.OfpOxmOfbField_UdpDst{
UdpDst: uint32(val.(uint16)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_VLAN_VID:
field.Value = &voltha.OfpOxmOfbField_VlanVid{
VlanVid: uint32((val.(uint16) & 0xfff) | 0x1000),
}
case 200: // voltha-protos doesn't actually have a type for vlan_mask
field = voltha.OfpOxmOfbField{Type: voltha.OxmOfbFieldTypes(oxmMap["vlan_vid"])}
field.HasMask = true
ofpOxmField = voltha.OfpOxmField{
OxmClass: ofp.OFPXMCOpenflowBasic,
Field: &openflow_13.OfpOxmField_OfbField{OfbField: &field},
}
field.Value = &voltha.OfpOxmOfbField_VlanVid{
VlanVid: uint32(val.(uint16)),
}
vidMask := val.(uint16)
field.Mask = &voltha.OfpOxmOfbField_VlanVidMask{
VlanVidMask: uint32(vidMask),
}
}
oxmList = append(oxmList, &ofpOxmField)
}
// Construct the instructions
var instructions []*voltha.OfpInstruction
for _, ofpInstruction := range flowAdd.GetInstructions() {
instructionType := ofpInstruction.GetType()
instruction := voltha.OfpInstruction{Type: uint32(instructionType)}
switch instructionType {
case ofp.OFPITGotoTable:
instruction.Data = &openflow_13.OfpInstruction_GotoTable{
GotoTable: &openflow_13.OfpInstructionGotoTable{
TableId: uint32(ofpInstruction.(ofp.IInstructionGotoTable).GetTableId()),
},
}
case ofp.OFPITWriteMetadata:
instruction.Data = &openflow_13.OfpInstruction_WriteMetadata{
WriteMetadata: &openflow_13.OfpInstructionWriteMetadata{
Metadata: ofpInstruction.(ofp.IInstructionWriteMetadata).GetMetadata(),
MetadataMask: ofpInstruction.(ofp.IInstructionWriteMetadata).GetMetadataMask(),
},
}
case ofp.OFPITWriteActions:
var ofpActions []*openflow_13.OfpAction
for _, action := range ofpInstruction.(ofp.IInstructionWriteActions).GetActions() {
ofpActions = append(ofpActions, extractAction(action))
}
instruction.Data = &openflow_13.OfpInstruction_Actions{
Actions: &openflow_13.OfpInstructionActions{
Actions: ofpActions,
},
}
case ofp.OFPITApplyActions:
var ofpActions []*openflow_13.OfpAction
for _, action := range ofpInstruction.(ofp.IInstructionApplyActions).GetActions() {
ofpActions = append(ofpActions, extractAction(action))
}
instruction.Data = &openflow_13.OfpInstruction_Actions{
Actions: &openflow_13.OfpInstructionActions{
Actions: ofpActions,
},
}
case ofp.OFPITMeter:
instruction.Data = &openflow_13.OfpInstruction_Meter{
Meter: &openflow_13.OfpInstructionMeter{
MeterId: ofpInstruction.(ofp.IInstructionMeter).GetMeterId(),
},
}
}
instructions = append(instructions, &instruction)
}
// Construct the request
flowUpdate := openflow_13.FlowTableUpdate{
Id: ofc.DeviceID,
FlowMod: &voltha.OfpFlowMod{
Cookie: flowAdd.Cookie,
CookieMask: flowAdd.CookieMask,
TableId: uint32(flowAdd.TableId),
Command: voltha.OfpFlowModCommand_OFPFC_ADD,
IdleTimeout: uint32(flowAdd.IdleTimeout),
HardTimeout: uint32(flowAdd.HardTimeout),
Priority: uint32(flowAdd.Priority),
BufferId: flowAdd.BufferId,
OutPort: uint32(flowAdd.OutPort),
OutGroup: uint32(flowAdd.OutGroup),
Flags: uint32(flowAdd.Flags),
Match: &voltha.OfpMatch{
Type: voltha.OfpMatchType(flowAdd.Match.GetType()),
OxmFields: oxmList,
},
Instructions: instructions,
},
}
if logger.V(log.DebugLevel) {
flowUpdateJs, _ := json.Marshal(flowUpdate)
logger.Debugf("FlowAdd being sent to Voltha",
log.Fields{
"device-id": ofc.DeviceID,
"flow-mod-object": flowUpdate,
"flow-mod-request": flowUpdateJs})
}
if _, err := volthaClient.UpdateLogicalDeviceFlowTable(context.Background(), &flowUpdate); err != nil {
logger.Errorw("Error calling FlowAdd ",
log.Fields{
"device-id": ofc.DeviceID,
"error": err})
// Report failure to controller
message := ofp.NewFlowModFailedErrorMsg()
message.SetXid(flowAdd.Xid)
message.SetCode(ofp.OFPFMFCBadCommand)
//OF 1.3
message.SetVersion(4)
bs := make([]byte, 2)
//OF 1.3
bs[0] = byte(4)
//Flow Mod
bs[1] = byte(14)
//Length of the message
length := make([]byte, 2)
binary.BigEndian.PutUint16(length, 56)
bs = append(bs, length...)
empty := []byte{0, 0, 0, 0}
bs = append(bs, empty...)
//Cookie of the Flow
cookie := make([]byte, 52)
binary.BigEndian.PutUint64(cookie, flowAdd.Cookie)
bs = append(bs, cookie...)
message.SetData(bs)
message.Length = uint16(unsafe.Sizeof(*message))
err := ofc.SendMessage(message)
if err != nil {
logger.Errorw("Error reporting failure of FlowUpdate to controller",
log.Fields{
"device-id": ofc.DeviceID,
"error": err})
}
}
}
func (ofc *OFClient) handleFlowMod(flowMod *ofp.FlowMod) {
if logger.V(log.DebugLevel) {
js, _ := json.Marshal(flowMod)
logger.Debugw("handleFlowMod called",
log.Fields{
"device-id": ofc.DeviceID,
"flow-mod": js})
}
logger.Errorw("handleFlowMod not implemented",
log.Fields{"device-id": ofc.DeviceID})
}
func (ofc *OFClient) handleFlowModStrict(flowModStrict *ofp.FlowModifyStrict) {
if logger.V(log.DebugLevel) {
js, _ := json.Marshal(flowModStrict)
logger.Debugw("handleFlowModStrict called",
log.Fields{
"device-id": ofc.DeviceID,
"flow-mod-strict": js})
}
logger.Error("handleFlowModStrict not implemented",
log.Fields{"device-id": ofc.DeviceID})
}
func (ofc *OFClient) handleFlowDelete(flowDelete *ofp.FlowDelete) {
if logger.V(log.DebugLevel) {
js, _ := json.Marshal(flowDelete)
logger.Debugw("handleFlowDelete called",
log.Fields{
"device-id": ofc.DeviceID,
"flow-delete": js})
}
logger.Error("handleFlowDelete not implemented",
log.Fields{"device-id": ofc.DeviceID})
}
func (ofc *OFClient) handleFlowDeleteStrict(flowDeleteStrict *ofp.FlowDeleteStrict) {
if logger.V(log.DebugLevel) {
js, _ := json.Marshal(flowDeleteStrict)
logger.Debugw("handleFlowDeleteStrict called",
log.Fields{
"device-id": ofc.DeviceID,
"flow-delete-strict": js})
}
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
logger.Errorw("no-voltha-connection",
log.Fields{"device-id": ofc.DeviceID})
return
}
// Construct match
var oxmList []*voltha.OfpOxmField
for _, oxmField := range flowDeleteStrict.Match.GetOxmList() {
name := oxmMap[oxmField.GetOXMName()]
val := oxmField.GetOXMValue()
var ofpOxmField voltha.OfpOxmField
ofpOxmField.OxmClass = ofp.OFPXMCOpenflowBasic
var field voltha.OfpOxmOfbField
field.Type = voltha.OxmOfbFieldTypes(name)
var x openflow_13.OfpOxmField_OfbField
x.OfbField = &field
ofpOxmField.Field = &x
switch voltha.OxmOfbFieldTypes(name) {
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IN_PORT:
field.Value = &voltha.OfpOxmOfbField_Port{
Port: uint32(val.(ofp.Port)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IN_PHY_PORT:
field.Value = &voltha.OfpOxmOfbField_PhysicalPort{
PhysicalPort: val.(uint32),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_METADATA:
field.Value = &voltha.OfpOxmOfbField_TableMetadata{
TableMetadata: val.(uint64),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_ETH_TYPE:
field.Value = &voltha.OfpOxmOfbField_EthType{
EthType: uint32(val.(ofp.EthernetType)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_IP_PROTO:
field.Value = &voltha.OfpOxmOfbField_IpProto{
IpProto: uint32(val.(ofp.IpPrototype)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_UDP_SRC:
field.Value = &voltha.OfpOxmOfbField_UdpSrc{
UdpSrc: uint32(val.(uint16)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_UDP_DST:
field.Value = &voltha.OfpOxmOfbField_UdpDst{
UdpDst: uint32(val.(uint16)),
}
case voltha.OxmOfbFieldTypes_OFPXMT_OFB_VLAN_VID:
field.Value = &voltha.OfpOxmOfbField_VlanVid{
VlanVid: uint32(val.(uint16)),
}
case 200: // voltha-protos doesn't actually have a type for vlan_mask
field = voltha.OfpOxmOfbField{Type: voltha.OxmOfbFieldTypes(oxmMap["vlan_vid"])}
field.HasMask = true
ofpOxmField = voltha.OfpOxmField{
OxmClass: ofp.OFPXMCOpenflowBasic,
Field: &openflow_13.OfpOxmField_OfbField{OfbField: &field},
}
field.Value = &voltha.OfpOxmOfbField_VlanVid{
VlanVid: uint32(val.(uint16)),
}
vidMask := val.(uint16)
field.Mask = &voltha.OfpOxmOfbField_VlanVidMask{
VlanVidMask: uint32(vidMask),
}
}
oxmList = append(oxmList, &ofpOxmField)
}
// Construct request
flowUpdate := openflow_13.FlowTableUpdate{
Id: ofc.DeviceID,
FlowMod: &voltha.OfpFlowMod{
Cookie: flowDeleteStrict.Cookie,
CookieMask: flowDeleteStrict.CookieMask,
TableId: uint32(flowDeleteStrict.TableId),
Command: voltha.OfpFlowModCommand_OFPFC_DELETE_STRICT,
IdleTimeout: uint32(flowDeleteStrict.IdleTimeout),
HardTimeout: uint32(flowDeleteStrict.HardTimeout),
Priority: uint32(flowDeleteStrict.Priority),
BufferId: flowDeleteStrict.BufferId,
OutPort: uint32(flowDeleteStrict.OutPort),
OutGroup: uint32(flowDeleteStrict.OutGroup),
Flags: uint32(flowDeleteStrict.Flags),
Match: &voltha.OfpMatch{
Type: voltha.OfpMatchType(flowDeleteStrict.Match.GetType()),
OxmFields: oxmList,
},
},
}
if logger.V(log.DebugLevel) {
flowUpdateJs, _ := json.Marshal(flowUpdate)
logger.Debugf("FlowDeleteStrict being sent to Voltha",
log.Fields{
"device-id": ofc.DeviceID,
"flow-update": flowUpdateJs})
}
if _, err := volthaClient.UpdateLogicalDeviceFlowTable(context.Background(), &flowUpdate); err != nil {
logger.Errorw("Error calling FlowDelete ",
log.Fields{
"device-id": ofc.DeviceID,
"error": err})
}
}