VOL-2153 move flow_utils.go from voltha-go to voltha-lib-go;
release 2.2.6
Based on voltha-go commit ec6e61b6239b955b6e7623ba3b604e8030154773
Change-Id: Id52f3eb1cb4bcade3f0e42da0129b643fdc5b0f9
diff --git a/pkg/flows/flow_utils.go b/pkg/flows/flow_utils.go
new file mode 100644
index 0000000..2dbf52d
--- /dev/null
+++ b/pkg/flows/flow_utils.go
@@ -0,0 +1,1332 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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 flows
+
+import (
+ "bytes"
+ "crypto/md5"
+ "fmt"
+ "github.com/cevaris/ordered_map"
+ "github.com/gogo/protobuf/proto"
+ "github.com/opencord/voltha-lib-go/pkg/log"
+ ofp "github.com/opencord/voltha-protos/go/openflow_13"
+ "math/big"
+ "strings"
+)
+
+var (
+ // Instructions shortcut
+ APPLY_ACTIONS = ofp.OfpInstructionType_OFPIT_APPLY_ACTIONS
+ WRITE_METADATA = ofp.OfpInstructionType_OFPIT_WRITE_METADATA
+ METER_ACTION = ofp.OfpInstructionType_OFPIT_METER
+
+ //OFPAT_* shortcuts
+ OUTPUT = ofp.OfpActionType_OFPAT_OUTPUT
+ COPY_TTL_OUT = ofp.OfpActionType_OFPAT_COPY_TTL_OUT
+ COPY_TTL_IN = ofp.OfpActionType_OFPAT_COPY_TTL_IN
+ SET_MPLS_TTL = ofp.OfpActionType_OFPAT_SET_MPLS_TTL
+ DEC_MPLS_TTL = ofp.OfpActionType_OFPAT_DEC_MPLS_TTL
+ PUSH_VLAN = ofp.OfpActionType_OFPAT_PUSH_VLAN
+ POP_VLAN = ofp.OfpActionType_OFPAT_POP_VLAN
+ PUSH_MPLS = ofp.OfpActionType_OFPAT_PUSH_MPLS
+ POP_MPLS = ofp.OfpActionType_OFPAT_POP_MPLS
+ SET_QUEUE = ofp.OfpActionType_OFPAT_SET_QUEUE
+ GROUP = ofp.OfpActionType_OFPAT_GROUP
+ SET_NW_TTL = ofp.OfpActionType_OFPAT_SET_NW_TTL
+ NW_TTL = ofp.OfpActionType_OFPAT_DEC_NW_TTL
+ SET_FIELD = ofp.OfpActionType_OFPAT_SET_FIELD
+ PUSH_PBB = ofp.OfpActionType_OFPAT_PUSH_PBB
+ POP_PBB = ofp.OfpActionType_OFPAT_POP_PBB
+ EXPERIMENTER = ofp.OfpActionType_OFPAT_EXPERIMENTER
+
+ //OFPXMT_OFB_* shortcuts (incomplete)
+ IN_PORT = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IN_PORT
+ IN_PHY_PORT = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IN_PHY_PORT
+ METADATA = ofp.OxmOfbFieldTypes_OFPXMT_OFB_METADATA
+ ETH_DST = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ETH_DST
+ ETH_SRC = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ETH_SRC
+ ETH_TYPE = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ETH_TYPE
+ VLAN_VID = ofp.OxmOfbFieldTypes_OFPXMT_OFB_VLAN_VID
+ VLAN_PCP = ofp.OxmOfbFieldTypes_OFPXMT_OFB_VLAN_PCP
+ IP_DSCP = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IP_DSCP
+ IP_ECN = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IP_ECN
+ IP_PROTO = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IP_PROTO
+ IPV4_SRC = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV4_SRC
+ IPV4_DST = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV4_DST
+ TCP_SRC = ofp.OxmOfbFieldTypes_OFPXMT_OFB_TCP_SRC
+ TCP_DST = ofp.OxmOfbFieldTypes_OFPXMT_OFB_TCP_DST
+ UDP_SRC = ofp.OxmOfbFieldTypes_OFPXMT_OFB_UDP_SRC
+ UDP_DST = ofp.OxmOfbFieldTypes_OFPXMT_OFB_UDP_DST
+ SCTP_SRC = ofp.OxmOfbFieldTypes_OFPXMT_OFB_SCTP_SRC
+ SCTP_DST = ofp.OxmOfbFieldTypes_OFPXMT_OFB_SCTP_DST
+ ICMPV4_TYPE = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ICMPV4_TYPE
+ ICMPV4_CODE = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ICMPV4_CODE
+ ARP_OP = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_OP
+ ARP_SPA = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_SPA
+ ARP_TPA = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_TPA
+ ARP_SHA = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_SHA
+ ARP_THA = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_THA
+ IPV6_SRC = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_SRC
+ IPV6_DST = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_DST
+ IPV6_FLABEL = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_FLABEL
+ ICMPV6_TYPE = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ICMPV6_TYPE
+ ICMPV6_CODE = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ICMPV6_CODE
+ IPV6_ND_TARGET = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_ND_TARGET
+ OFB_IPV6_ND_SLL = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_ND_SLL
+ IPV6_ND_TLL = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_ND_TLL
+ MPLS_LABEL = ofp.OxmOfbFieldTypes_OFPXMT_OFB_MPLS_LABEL
+ MPLS_TC = ofp.OxmOfbFieldTypes_OFPXMT_OFB_MPLS_TC
+ MPLS_BOS = ofp.OxmOfbFieldTypes_OFPXMT_OFB_MPLS_BOS
+ PBB_ISID = ofp.OxmOfbFieldTypes_OFPXMT_OFB_PBB_ISID
+ TUNNEL_ID = ofp.OxmOfbFieldTypes_OFPXMT_OFB_TUNNEL_ID
+ IPV6_EXTHDR = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_EXTHDR
+)
+
+//ofp_action_* shortcuts
+
+func Output(port uint32, maxLen ...ofp.OfpControllerMaxLen) *ofp.OfpAction {
+ maxLength := ofp.OfpControllerMaxLen_OFPCML_MAX
+ if len(maxLen) > 0 {
+ maxLength = maxLen[0]
+ }
+ return &ofp.OfpAction{Type: OUTPUT, Action: &ofp.OfpAction_Output{Output: &ofp.OfpActionOutput{Port: port, MaxLen: uint32(maxLength)}}}
+}
+
+func MplsTtl(ttl uint32) *ofp.OfpAction {
+ return &ofp.OfpAction{Type: SET_MPLS_TTL, Action: &ofp.OfpAction_MplsTtl{MplsTtl: &ofp.OfpActionMplsTtl{MplsTtl: ttl}}}
+}
+
+func PushVlan(ethType uint32) *ofp.OfpAction {
+ return &ofp.OfpAction{Type: PUSH_VLAN, Action: &ofp.OfpAction_Push{Push: &ofp.OfpActionPush{Ethertype: ethType}}}
+}
+
+func PopVlan() *ofp.OfpAction {
+ return &ofp.OfpAction{Type: POP_VLAN}
+}
+
+func PopMpls(ethType uint32) *ofp.OfpAction {
+ return &ofp.OfpAction{Type: POP_MPLS, Action: &ofp.OfpAction_PopMpls{PopMpls: &ofp.OfpActionPopMpls{Ethertype: ethType}}}
+}
+
+func Group(groupId uint32) *ofp.OfpAction {
+ return &ofp.OfpAction{Type: GROUP, Action: &ofp.OfpAction_Group{Group: &ofp.OfpActionGroup{GroupId: groupId}}}
+}
+
+func NwTtl(nwTtl uint32) *ofp.OfpAction {
+ return &ofp.OfpAction{Type: NW_TTL, Action: &ofp.OfpAction_NwTtl{NwTtl: &ofp.OfpActionNwTtl{NwTtl: nwTtl}}}
+}
+
+func SetField(field *ofp.OfpOxmOfbField) *ofp.OfpAction {
+ actionSetField := &ofp.OfpOxmField{OxmClass: ofp.OfpOxmClass_OFPXMC_OPENFLOW_BASIC, Field: &ofp.OfpOxmField_OfbField{OfbField: field}}
+ return &ofp.OfpAction{Type: SET_FIELD, Action: &ofp.OfpAction_SetField{SetField: &ofp.OfpActionSetField{Field: actionSetField}}}
+}
+
+func Experimenter(experimenter uint32, data []byte) *ofp.OfpAction {
+ return &ofp.OfpAction{Type: EXPERIMENTER, Action: &ofp.OfpAction_Experimenter{Experimenter: &ofp.OfpActionExperimenter{Experimenter: experimenter, Data: data}}}
+}
+
+//ofb_field generators (incomplete set)
+
+func InPort(inPort uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IN_PORT, Value: &ofp.OfpOxmOfbField_Port{Port: inPort}}
+}
+
+func InPhyPort(inPhyPort uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IN_PHY_PORT, Value: &ofp.OfpOxmOfbField_Port{Port: inPhyPort}}
+}
+
+func Metadata_ofp(tableMetadata uint64) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: METADATA, Value: &ofp.OfpOxmOfbField_TableMetadata{TableMetadata: tableMetadata}}
+}
+
+// should Metadata_ofp used here ?????
+func EthDst(ethDst uint64) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ETH_DST, Value: &ofp.OfpOxmOfbField_TableMetadata{TableMetadata: ethDst}}
+}
+
+// should Metadata_ofp used here ?????
+func EthSrc(ethSrc uint64) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ETH_SRC, Value: &ofp.OfpOxmOfbField_TableMetadata{TableMetadata: ethSrc}}
+}
+
+func EthType(ethType uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ETH_TYPE, Value: &ofp.OfpOxmOfbField_EthType{EthType: ethType}}
+}
+
+func VlanVid(vlanVid uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: VLAN_VID, Value: &ofp.OfpOxmOfbField_VlanVid{VlanVid: vlanVid}}
+}
+
+func VlanPcp(vlanPcp uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: VLAN_PCP, Value: &ofp.OfpOxmOfbField_VlanPcp{VlanPcp: vlanPcp}}
+}
+
+func IpDscp(ipDscp uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IP_DSCP, Value: &ofp.OfpOxmOfbField_IpDscp{IpDscp: ipDscp}}
+}
+
+func IpEcn(ipEcn uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IP_ECN, Value: &ofp.OfpOxmOfbField_IpEcn{IpEcn: ipEcn}}
+}
+
+func IpProto(ipProto uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IP_PROTO, Value: &ofp.OfpOxmOfbField_IpProto{IpProto: ipProto}}
+}
+
+func Ipv4Src(ipv4Src uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IPV4_SRC, Value: &ofp.OfpOxmOfbField_Ipv4Src{Ipv4Src: ipv4Src}}
+}
+
+func Ipv4Dst(ipv4Dst uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IPV4_DST, Value: &ofp.OfpOxmOfbField_Ipv4Dst{Ipv4Dst: ipv4Dst}}
+}
+
+func TcpSrc(tcpSrc uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: TCP_SRC, Value: &ofp.OfpOxmOfbField_TcpSrc{TcpSrc: tcpSrc}}
+}
+
+func TcpDst(tcpDst uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: TCP_DST, Value: &ofp.OfpOxmOfbField_TcpDst{TcpDst: tcpDst}}
+}
+
+func UdpSrc(udpSrc uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: UDP_SRC, Value: &ofp.OfpOxmOfbField_UdpSrc{UdpSrc: udpSrc}}
+}
+
+func UdpDst(udpDst uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: UDP_DST, Value: &ofp.OfpOxmOfbField_UdpDst{UdpDst: udpDst}}
+}
+
+func SctpSrc(sctpSrc uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: SCTP_SRC, Value: &ofp.OfpOxmOfbField_SctpSrc{SctpSrc: sctpSrc}}
+}
+
+func SctpDst(sctpDst uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: SCTP_DST, Value: &ofp.OfpOxmOfbField_SctpDst{SctpDst: sctpDst}}
+}
+
+func Icmpv4Type(icmpv4Type uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ICMPV4_TYPE, Value: &ofp.OfpOxmOfbField_Icmpv4Type{Icmpv4Type: icmpv4Type}}
+}
+
+func Icmpv4Code(icmpv4Code uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ICMPV4_CODE, Value: &ofp.OfpOxmOfbField_Icmpv4Code{Icmpv4Code: icmpv4Code}}
+}
+
+func ArpOp(arpOp uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ARP_OP, Value: &ofp.OfpOxmOfbField_ArpOp{ArpOp: arpOp}}
+}
+
+func ArpSpa(arpSpa uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ARP_SPA, Value: &ofp.OfpOxmOfbField_ArpSpa{ArpSpa: arpSpa}}
+}
+
+func ArpTpa(arpTpa uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ARP_TPA, Value: &ofp.OfpOxmOfbField_ArpTpa{ArpTpa: arpTpa}}
+}
+
+func ArpSha(arpSha []byte) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ARP_SHA, Value: &ofp.OfpOxmOfbField_ArpSha{ArpSha: arpSha}}
+}
+
+func ArpTha(arpTha []byte) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ARP_THA, Value: &ofp.OfpOxmOfbField_ArpTha{ArpTha: arpTha}}
+}
+
+func Ipv6Src(ipv6Src []byte) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IPV6_SRC, Value: &ofp.OfpOxmOfbField_Ipv6Src{Ipv6Src: ipv6Src}}
+}
+
+func Ipv6Dst(ipv6Dst []byte) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IPV6_DST, Value: &ofp.OfpOxmOfbField_Ipv6Dst{Ipv6Dst: ipv6Dst}}
+}
+
+func Ipv6Flabel(ipv6Flabel uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IPV6_FLABEL, Value: &ofp.OfpOxmOfbField_Ipv6Flabel{Ipv6Flabel: ipv6Flabel}}
+}
+
+func Icmpv6Type(icmpv6Type uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ICMPV6_TYPE, Value: &ofp.OfpOxmOfbField_Icmpv6Type{Icmpv6Type: icmpv6Type}}
+}
+
+func Icmpv6Code(icmpv6Code uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: ICMPV6_CODE, Value: &ofp.OfpOxmOfbField_Icmpv6Code{Icmpv6Code: icmpv6Code}}
+}
+
+func Ipv6NdTarget(ipv6NdTarget []byte) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IPV6_ND_TARGET, Value: &ofp.OfpOxmOfbField_Ipv6NdTarget{Ipv6NdTarget: ipv6NdTarget}}
+}
+
+func OfbIpv6NdSll(ofbIpv6NdSll []byte) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: OFB_IPV6_ND_SLL, Value: &ofp.OfpOxmOfbField_Ipv6NdSsl{Ipv6NdSsl: ofbIpv6NdSll}}
+}
+
+func Ipv6NdTll(ipv6NdTll []byte) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IPV6_ND_TLL, Value: &ofp.OfpOxmOfbField_Ipv6NdTll{Ipv6NdTll: ipv6NdTll}}
+}
+
+func MplsLabel(mplsLabel uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: MPLS_LABEL, Value: &ofp.OfpOxmOfbField_MplsLabel{MplsLabel: mplsLabel}}
+}
+
+func MplsTc(mplsTc uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: MPLS_TC, Value: &ofp.OfpOxmOfbField_MplsTc{MplsTc: mplsTc}}
+}
+
+func MplsBos(mplsBos uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: MPLS_BOS, Value: &ofp.OfpOxmOfbField_MplsBos{MplsBos: mplsBos}}
+}
+
+func PbbIsid(pbbIsid uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: PBB_ISID, Value: &ofp.OfpOxmOfbField_PbbIsid{PbbIsid: pbbIsid}}
+}
+
+func TunnelId(tunnelId uint64) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: TUNNEL_ID, Value: &ofp.OfpOxmOfbField_TunnelId{TunnelId: tunnelId}}
+}
+
+func Ipv6Exthdr(ipv6Exthdr uint32) *ofp.OfpOxmOfbField {
+ return &ofp.OfpOxmOfbField{Type: IPV6_EXTHDR, Value: &ofp.OfpOxmOfbField_Ipv6Exthdr{Ipv6Exthdr: ipv6Exthdr}}
+}
+
+//frequently used extractors
+
+func excludeAction(action *ofp.OfpAction, exclude ...ofp.OfpActionType) bool {
+ for _, actionToExclude := range exclude {
+ if action.Type == actionToExclude {
+ return true
+ }
+ }
+ return false
+}
+
+func GetActions(flow *ofp.OfpFlowStats, exclude ...ofp.OfpActionType) []*ofp.OfpAction {
+ if flow == nil {
+ return nil
+ }
+ for _, instruction := range flow.Instructions {
+ if instruction.Type == uint32(ofp.OfpInstructionType_OFPIT_APPLY_ACTIONS) {
+ instActions := instruction.GetActions()
+ if instActions == nil {
+ return nil
+ }
+ if len(exclude) == 0 {
+ return instActions.Actions
+ } else {
+ filteredAction := make([]*ofp.OfpAction, 0)
+ for _, action := range instActions.Actions {
+ if !excludeAction(action, exclude...) {
+ filteredAction = append(filteredAction, action)
+ }
+ }
+ return filteredAction
+ }
+ }
+ }
+ return nil
+}
+
+func UpdateOutputPortByActionType(flow *ofp.OfpFlowStats, actionType uint32, toPort uint32) *ofp.OfpFlowStats {
+ if flow == nil {
+ return nil
+ }
+ nFlow := (proto.Clone(flow)).(*ofp.OfpFlowStats)
+ nFlow.Instructions = nil
+ nInsts := make([]*ofp.OfpInstruction, 0)
+ for _, instruction := range flow.Instructions {
+ if instruction.Type == actionType {
+ instActions := instruction.GetActions()
+ if instActions == nil {
+ return nil
+ }
+ nActions := make([]*ofp.OfpAction, 0)
+ for _, action := range instActions.Actions {
+ if action.GetOutput() != nil {
+ nActions = append(nActions, Output(toPort))
+ } else {
+ nActions = append(nActions, action)
+ }
+ }
+ instructionAction := ofp.OfpInstruction_Actions{Actions: &ofp.OfpInstructionActions{Actions: nActions}}
+ nInsts = append(nInsts, &ofp.OfpInstruction{Type: uint32(APPLY_ACTIONS), Data: &instructionAction})
+ } else {
+ nInsts = append(nInsts, instruction)
+ }
+ }
+ nFlow.Instructions = nInsts
+ return nFlow
+}
+
+func excludeOxmOfbField(field *ofp.OfpOxmOfbField, exclude ...ofp.OxmOfbFieldTypes) bool {
+ for _, fieldToExclude := range exclude {
+ if field.Type == fieldToExclude {
+ return true
+ }
+ }
+ return false
+}
+
+func GetOfbFields(flow *ofp.OfpFlowStats, exclude ...ofp.OxmOfbFieldTypes) []*ofp.OfpOxmOfbField {
+ if flow == nil || flow.Match == nil || flow.Match.Type != ofp.OfpMatchType_OFPMT_OXM {
+ return nil
+ }
+ ofbFields := make([]*ofp.OfpOxmOfbField, 0)
+ for _, field := range flow.Match.OxmFields {
+ if field.OxmClass == ofp.OfpOxmClass_OFPXMC_OPENFLOW_BASIC {
+ ofbFields = append(ofbFields, field.GetOfbField())
+ }
+ }
+ if len(exclude) == 0 {
+ return ofbFields
+ } else {
+ filteredFields := make([]*ofp.OfpOxmOfbField, 0)
+ for _, ofbField := range ofbFields {
+ if !excludeOxmOfbField(ofbField, exclude...) {
+ filteredFields = append(filteredFields, ofbField)
+ }
+ }
+ return filteredFields
+ }
+}
+
+func GetPacketOutPort(packet *ofp.OfpPacketOut) uint32 {
+ if packet == nil {
+ return 0
+ }
+ for _, action := range packet.GetActions() {
+ if action.Type == OUTPUT {
+ return action.GetOutput().Port
+ }
+ }
+ return 0
+}
+
+func GetOutPort(flow *ofp.OfpFlowStats) uint32 {
+ if flow == nil {
+ return 0
+ }
+ for _, action := range GetActions(flow) {
+ if action.Type == OUTPUT {
+ out := action.GetOutput()
+ if out == nil {
+ return 0
+ }
+ return out.GetPort()
+ }
+ }
+ return 0
+}
+
+func GetInPort(flow *ofp.OfpFlowStats) uint32 {
+ if flow == nil {
+ return 0
+ }
+ for _, field := range GetOfbFields(flow) {
+ if field.Type == IN_PORT {
+ return field.GetPort()
+ }
+ }
+ return 0
+}
+
+func GetGotoTableId(flow *ofp.OfpFlowStats) uint32 {
+ if flow == nil {
+ return 0
+ }
+ for _, instruction := range flow.Instructions {
+ if instruction.Type == uint32(ofp.OfpInstructionType_OFPIT_GOTO_TABLE) {
+ gotoTable := instruction.GetGotoTable()
+ if gotoTable == nil {
+ return 0
+ }
+ return gotoTable.GetTableId()
+ }
+ }
+ return 0
+}
+
+func GetMeterId(flow *ofp.OfpFlowStats) uint32 {
+ if flow == nil {
+ return 0
+ }
+ for _, instruction := range flow.Instructions {
+ if instruction.Type == uint32(ofp.OfpInstructionType_OFPIT_METER) {
+ MeterInstruction := instruction.GetMeter()
+ if MeterInstruction == nil {
+ return 0
+ }
+ return MeterInstruction.GetMeterId()
+ }
+ }
+ return 0
+}
+
+func GetVlanVid(flow *ofp.OfpFlowStats) *uint32 {
+ if flow == nil {
+ return nil
+ }
+ for _, field := range GetOfbFields(flow) {
+ if field.Type == VLAN_VID {
+ ret := field.GetVlanVid()
+ return &ret
+ }
+ }
+ // Dont return 0 if the field is missing as vlan id value 0 has meaning and cannot be overloaded as "not found"
+ return nil
+}
+
+func GetTunnelId(flow *ofp.OfpFlowStats) uint64 {
+ if flow == nil {
+ return 0
+ }
+ for _, field := range GetOfbFields(flow) {
+ if field.Type == TUNNEL_ID {
+ return field.GetTunnelId()
+ }
+ }
+ return 0
+}
+
+//GetMetaData - legacy get method (only want lower 32 bits)
+func GetMetaData(flow *ofp.OfpFlowStats) uint32 {
+ if flow == nil {
+ return 0
+ }
+ for _, field := range GetOfbFields(flow) {
+ if field.Type == METADATA {
+ return uint32(field.GetTableMetadata() & 0xFFFFFFFF)
+ }
+ }
+ log.Debug("No-metadata-present")
+ return 0
+}
+
+func GetMetaData64Bit(flow *ofp.OfpFlowStats) uint64 {
+ if flow == nil {
+ return 0
+ }
+ for _, field := range GetOfbFields(flow) {
+ if field.Type == METADATA {
+ return field.GetTableMetadata()
+ }
+ }
+ log.Debug("No-metadata-present")
+ return 0
+}
+
+// function returns write metadata value from write_metadata action field
+func GetMetadataFromWriteMetadataAction(flow *ofp.OfpFlowStats) uint64 {
+ if flow != nil {
+ for _, instruction := range flow.Instructions {
+ if instruction.Type == uint32(WRITE_METADATA) {
+ if writeMetadata := instruction.GetWriteMetadata(); writeMetadata != nil {
+ return writeMetadata.GetMetadata()
+ }
+ }
+ }
+ }
+ log.Debugw("No-write-metadata-present", log.Fields{"flow": flow})
+ return 0
+}
+
+func GetTechProfileIDFromWriteMetaData(metadata uint64) uint16 {
+ /*
+ Write metadata instruction value (metadata) is 8 bytes:
+ MS 2 bytes: C Tag
+ Next 2 bytes: Technology Profile Id
+ Next 4 bytes: Port number (uni or nni)
+
+ This is set in the ONOS OltPipeline as a write metadata instruction
+ */
+ var tpId uint16 = 0
+ log.Debugw("Write metadata value for Techprofile ID", log.Fields{"metadata": metadata})
+ if metadata != 0 {
+ tpId = uint16((metadata >> 32) & 0xFFFF)
+ log.Debugw("Found techprofile ID from write metadata action", log.Fields{"tpid": tpId})
+ }
+ return tpId
+}
+
+func GetEgressPortNumberFromWriteMetadata(flow *ofp.OfpFlowStats) uint32 {
+ /*
+ Write metadata instruction value (metadata) is 8 bytes:
+ MS 2 bytes: C Tag
+ Next 2 bytes: Technology Profile Id
+ Next 4 bytes: Port number (uni or nni)
+ This is set in the ONOS OltPipeline as a write metadata instruction
+ */
+ var uniPort uint32 = 0
+ md := GetMetadataFromWriteMetadataAction(flow)
+ log.Debugw("Metadata found for egress/uni port ", log.Fields{"metadata": md})
+ if md != 0 {
+ uniPort = uint32(md & 0xFFFFFFFF)
+ log.Debugw("Found EgressPort from write metadata action", log.Fields{"egress_port": uniPort})
+ }
+ return uniPort
+
+}
+
+func GetInnerTagFromMetaData(flow *ofp.OfpFlowStats) uint16 {
+ /*
+ Write metadata instruction value (metadata) is 8 bytes:
+ MS 2 bytes: C Tag
+ Next 2 bytes: Technology Profile Id
+ Next 4 bytes: Port number (uni or nni)
+ This is set in the ONOS OltPipeline as a write metadata instruction
+ */
+ var innerTag uint16 = 0
+ md := GetMetadataFromWriteMetadataAction(flow)
+ if md != 0 {
+ innerTag = uint16((md >> 48) & 0xFFFF)
+ log.Debugw("Found CVLAN from write metadate action", log.Fields{"c_vlan": innerTag})
+ }
+ return innerTag
+}
+
+//GetInnerTagFromMetaData retrieves the inner tag from the Metadata_ofp. The port number (UNI on ONU) is in the
+// lower 32-bits of Metadata_ofp and the inner_tag is in the upper 32-bits. This is set in the ONOS OltPipeline as
+//// a Metadata_ofp field
+/*func GetInnerTagFromMetaData(flow *ofp.OfpFlowStats) uint64 {
+ md := GetMetaData64Bit(flow)
+ if md == 0 {
+ return 0
+ }
+ if md <= 0xffffffff {
+ log.Debugw("onos-upgrade-suggested", log.Fields{"Metadata_ofp": md, "message": "Legacy MetaData detected form OltPipeline"})
+ return md
+ }
+ return (md >> 32) & 0xffffffff
+}*/
+
+// Extract the child device port from a flow that contains the parent device peer port. Typically the UNI port of an
+// ONU child device. Per TST agreement this will be the lower 32 bits of tunnel id reserving upper 32 bits for later
+// use
+func GetChildPortFromTunnelId(flow *ofp.OfpFlowStats) uint32 {
+ tid := GetTunnelId(flow)
+ if tid == 0 {
+ return 0
+ }
+ // Per TST agreement we are keeping any child port id (uni port id) in the lower 32 bits
+ return uint32(tid & 0xffffffff)
+}
+
+func HasNextTable(flow *ofp.OfpFlowStats) bool {
+ if flow == nil {
+ return false
+ }
+ return GetGotoTableId(flow) != 0
+}
+
+func GetGroup(flow *ofp.OfpFlowStats) uint32 {
+ if flow == nil {
+ return 0
+ }
+ for _, action := range GetActions(flow) {
+ if action.Type == GROUP {
+ grp := action.GetGroup()
+ if grp == nil {
+ return 0
+ }
+ return grp.GetGroupId()
+ }
+ }
+ return 0
+}
+
+func HasGroup(flow *ofp.OfpFlowStats) bool {
+ return GetGroup(flow) != 0
+}
+
+// GetNextTableId returns the next table ID if the "table_id" is present in the map, otherwise return nil
+func GetNextTableId(kw OfpFlowModArgs) *uint32 {
+ if val, exist := kw["table_id"]; exist {
+ ret := uint32(val)
+ return &ret
+ }
+ return nil
+}
+
+// GetMeterIdFlowModArgs returns the meterId if the "meter_id" is present in the map, otherwise return 0
+func GetMeterIdFlowModArgs(kw OfpFlowModArgs) uint32 {
+ if val, exist := kw["meter_id"]; exist {
+ return uint32(val)
+ }
+ return 0
+}
+
+// Function returns the metadata if the "write_metadata" is present in the map, otherwise return nil
+func GetMetadataFlowModArgs(kw OfpFlowModArgs) uint64 {
+ if val, exist := kw["write_metadata"]; exist {
+ ret := uint64(val)
+ return ret
+ }
+ return 0
+}
+
+// Return unique 64-bit integer hash for flow covering the following attributes:
+// 'table_id', 'priority', 'flags', 'cookie', 'match', '_instruction_string'
+func HashFlowStats(flow *ofp.OfpFlowStats) uint64 {
+ if flow == nil { // Should never happen
+ return 0
+ }
+ // Create string with the instructions field first
+ var instructionString bytes.Buffer
+ for _, instruction := range flow.Instructions {
+ instructionString.WriteString(instruction.String())
+ }
+ var flowString = fmt.Sprintf("%d%d%d%d%s%s", flow.TableId, flow.Priority, flow.Flags, flow.Cookie, flow.Match.String(), instructionString.String())
+ h := md5.New()
+ h.Write([]byte(flowString))
+ hash := big.NewInt(0)
+ hash.SetBytes(h.Sum(nil))
+ return hash.Uint64()
+}
+
+// flowStatsEntryFromFlowModMessage maps an ofp_flow_mod message to an ofp_flow_stats message
+func FlowStatsEntryFromFlowModMessage(mod *ofp.OfpFlowMod) *ofp.OfpFlowStats {
+ flow := &ofp.OfpFlowStats{}
+ if mod == nil {
+ return flow
+ }
+ flow.TableId = mod.TableId
+ flow.Priority = mod.Priority
+ flow.IdleTimeout = mod.IdleTimeout
+ flow.HardTimeout = mod.HardTimeout
+ flow.Flags = mod.Flags
+ flow.Cookie = mod.Cookie
+ flow.Match = mod.Match
+ flow.Instructions = mod.Instructions
+ flow.Id = HashFlowStats(flow)
+ return flow
+}
+
+func GroupEntryFromGroupMod(mod *ofp.OfpGroupMod) *ofp.OfpGroupEntry {
+ group := &ofp.OfpGroupEntry{}
+ if mod == nil {
+ return group
+ }
+ group.Desc = &ofp.OfpGroupDesc{Type: mod.Type, GroupId: mod.GroupId, Buckets: mod.Buckets}
+ group.Stats = &ofp.OfpGroupStats{GroupId: mod.GroupId}
+ //TODO do we need to instantiate bucket bins?
+ return group
+}
+
+// flowStatsEntryFromFlowModMessage maps an ofp_flow_mod message to an ofp_flow_stats message
+func MeterEntryFromMeterMod(meterMod *ofp.OfpMeterMod) *ofp.OfpMeterEntry {
+ bandStats := make([]*ofp.OfpMeterBandStats, 0)
+ meter := &ofp.OfpMeterEntry{Config: &ofp.OfpMeterConfig{},
+ Stats: &ofp.OfpMeterStats{BandStats: bandStats}}
+ if meterMod == nil {
+ log.Error("Invalid meter mod command")
+ return meter
+ }
+ // config init
+ meter.Config.MeterId = meterMod.MeterId
+ meter.Config.Flags = meterMod.Flags
+ meter.Config.Bands = meterMod.Bands
+ // meter stats init
+ meter.Stats.MeterId = meterMod.MeterId
+ meter.Stats.FlowCount = 0
+ meter.Stats.PacketInCount = 0
+ meter.Stats.ByteInCount = 0
+ meter.Stats.DurationSec = 0
+ meter.Stats.DurationNsec = 0
+ // band stats init
+ for _, _ = range meterMod.Bands {
+ band := &ofp.OfpMeterBandStats{}
+ band.PacketBandCount = 0
+ band.ByteBandCount = 0
+ bandStats = append(bandStats, band)
+ }
+ meter.Stats.BandStats = bandStats
+ log.Debugw("Allocated meter entry", log.Fields{"meter": *meter})
+ return meter
+
+}
+
+func GetMeterIdFromFlow(flow *ofp.OfpFlowStats) uint32 {
+ if flow != nil {
+ for _, instruction := range flow.Instructions {
+ if instruction.Type == uint32(METER_ACTION) {
+ if meterInst := instruction.GetMeter(); meterInst != nil {
+ return meterInst.GetMeterId()
+ }
+ }
+ }
+ }
+
+ return uint32(0)
+}
+
+func MkOxmFields(matchFields []ofp.OfpOxmField) []*ofp.OfpOxmField {
+ oxmFields := make([]*ofp.OfpOxmField, 0)
+ for _, matchField := range matchFields {
+ oxmField := ofp.OfpOxmField{OxmClass: ofp.OfpOxmClass_OFPXMC_OPENFLOW_BASIC, Field: matchField.Field}
+ oxmFields = append(oxmFields, &oxmField)
+ }
+ return oxmFields
+}
+
+func MkInstructionsFromActions(actions []*ofp.OfpAction) []*ofp.OfpInstruction {
+ instructions := make([]*ofp.OfpInstruction, 0)
+ instructionAction := ofp.OfpInstruction_Actions{Actions: &ofp.OfpInstructionActions{Actions: actions}}
+ instruction := ofp.OfpInstruction{Type: uint32(APPLY_ACTIONS), Data: &instructionAction}
+ instructions = append(instructions, &instruction)
+ return instructions
+}
+
+// Convenience function to generare ofp_flow_mod message with OXM BASIC match composed from the match_fields, and
+// single APPLY_ACTIONS instruction with a list if ofp_action objects.
+func MkSimpleFlowMod(matchFields []*ofp.OfpOxmField, actions []*ofp.OfpAction, command *ofp.OfpFlowModCommand, kw OfpFlowModArgs) *ofp.OfpFlowMod {
+
+ // Process actions instructions
+ instructions := make([]*ofp.OfpInstruction, 0)
+ instructionAction := ofp.OfpInstruction_Actions{Actions: &ofp.OfpInstructionActions{Actions: actions}}
+ instruction := ofp.OfpInstruction{Type: uint32(APPLY_ACTIONS), Data: &instructionAction}
+ instructions = append(instructions, &instruction)
+
+ // Process next table
+ if tableId := GetNextTableId(kw); tableId != nil {
+ var instGotoTable ofp.OfpInstruction_GotoTable
+ instGotoTable.GotoTable = &ofp.OfpInstructionGotoTable{TableId: *tableId}
+ inst := ofp.OfpInstruction{Type: uint32(ofp.OfpInstructionType_OFPIT_GOTO_TABLE), Data: &instGotoTable}
+ instructions = append(instructions, &inst)
+ }
+ // Process meter action
+ if meterId := GetMeterIdFlowModArgs(kw); meterId != 0 {
+ var instMeter ofp.OfpInstruction_Meter
+ instMeter.Meter = &ofp.OfpInstructionMeter{MeterId: meterId}
+ inst := ofp.OfpInstruction{Type: uint32(METER_ACTION), Data: &instMeter}
+ instructions = append(instructions, &inst)
+ }
+ //process write_metadata action
+ if metadata := GetMetadataFlowModArgs(kw); metadata != 0 {
+ var instWriteMetadata ofp.OfpInstruction_WriteMetadata
+ instWriteMetadata.WriteMetadata = &ofp.OfpInstructionWriteMetadata{Metadata: metadata}
+ inst := ofp.OfpInstruction{Type: uint32(WRITE_METADATA), Data: &instWriteMetadata}
+ instructions = append(instructions, &inst)
+ }
+
+ // Process match fields
+ oxmFields := make([]*ofp.OfpOxmField, 0)
+ for _, matchField := range matchFields {
+ oxmField := ofp.OfpOxmField{OxmClass: ofp.OfpOxmClass_OFPXMC_OPENFLOW_BASIC, Field: matchField.Field}
+ oxmFields = append(oxmFields, &oxmField)
+ }
+ var match ofp.OfpMatch
+ match.Type = ofp.OfpMatchType_OFPMT_OXM
+ match.OxmFields = oxmFields
+
+ // Create ofp_flow_message
+ msg := &ofp.OfpFlowMod{}
+ if command == nil {
+ msg.Command = ofp.OfpFlowModCommand_OFPFC_ADD
+ } else {
+ msg.Command = *command
+ }
+ msg.Instructions = instructions
+ msg.Match = &match
+
+ // Set the variadic argument values
+ msg = setVariadicModAttributes(msg, kw)
+
+ return msg
+}
+
+func MkMulticastGroupMod(groupId uint32, buckets []*ofp.OfpBucket, command *ofp.OfpGroupModCommand) *ofp.OfpGroupMod {
+ group := &ofp.OfpGroupMod{}
+ if command == nil {
+ group.Command = ofp.OfpGroupModCommand_OFPGC_ADD
+ } else {
+ group.Command = *command
+ }
+ group.Type = ofp.OfpGroupType_OFPGT_ALL
+ group.GroupId = groupId
+ group.Buckets = buckets
+ return group
+}
+
+//SetVariadicModAttributes sets only uint64 or uint32 fields of the ofp_flow_mod message
+func setVariadicModAttributes(mod *ofp.OfpFlowMod, args OfpFlowModArgs) *ofp.OfpFlowMod {
+ if args == nil {
+ return mod
+ }
+ for key, val := range args {
+ switch key {
+ case "cookie":
+ mod.Cookie = val
+ case "cookie_mask":
+ mod.CookieMask = val
+ case "table_id":
+ mod.TableId = uint32(val)
+ case "idle_timeout":
+ mod.IdleTimeout = uint32(val)
+ case "hard_timeout":
+ mod.HardTimeout = uint32(val)
+ case "priority":
+ mod.Priority = uint32(val)
+ case "buffer_id":
+ mod.BufferId = uint32(val)
+ case "out_port":
+ mod.OutPort = uint32(val)
+ case "out_group":
+ mod.OutGroup = uint32(val)
+ case "flags":
+ mod.Flags = uint32(val)
+ }
+ }
+ return mod
+}
+
+func MkPacketIn(port uint32, packet []byte) *ofp.OfpPacketIn {
+ packetIn := &ofp.OfpPacketIn{
+ Reason: ofp.OfpPacketInReason_OFPR_ACTION,
+ Match: &ofp.OfpMatch{
+ Type: ofp.OfpMatchType_OFPMT_OXM,
+ OxmFields: []*ofp.OfpOxmField{
+ {
+ OxmClass: ofp.OfpOxmClass_OFPXMC_OPENFLOW_BASIC,
+ Field: &ofp.OfpOxmField_OfbField{
+ OfbField: InPort(port)},
+ },
+ },
+ },
+ Data: packet,
+ }
+ return packetIn
+}
+
+// MkFlowStat is a helper method to build flows
+func MkFlowStat(fa *FlowArgs) *ofp.OfpFlowStats {
+ //Build the match-fields
+ matchFields := make([]*ofp.OfpOxmField, 0)
+ for _, val := range fa.MatchFields {
+ matchFields = append(matchFields, &ofp.OfpOxmField{Field: &ofp.OfpOxmField_OfbField{OfbField: val}})
+ }
+ return FlowStatsEntryFromFlowModMessage(MkSimpleFlowMod(matchFields, fa.Actions, fa.Command, fa.KV))
+}
+
+func MkGroupStat(ga *GroupArgs) *ofp.OfpGroupEntry {
+ return GroupEntryFromGroupMod(MkMulticastGroupMod(ga.GroupId, ga.Buckets, ga.Command))
+}
+
+type OfpFlowModArgs map[string]uint64
+
+type FlowArgs struct {
+ MatchFields []*ofp.OfpOxmOfbField
+ Actions []*ofp.OfpAction
+ Command *ofp.OfpFlowModCommand
+ Priority uint32
+ KV OfpFlowModArgs
+}
+
+type GroupArgs struct {
+ GroupId uint32
+ Buckets []*ofp.OfpBucket
+ Command *ofp.OfpGroupModCommand
+}
+
+type FlowsAndGroups struct {
+ Flows *ordered_map.OrderedMap
+ Groups *ordered_map.OrderedMap
+}
+
+func NewFlowsAndGroups() *FlowsAndGroups {
+ var fg FlowsAndGroups
+ fg.Flows = ordered_map.NewOrderedMap()
+ fg.Groups = ordered_map.NewOrderedMap()
+ return &fg
+}
+
+func (fg *FlowsAndGroups) Copy() *FlowsAndGroups {
+ copyFG := NewFlowsAndGroups()
+ iter := fg.Flows.IterFunc()
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpFlowStats); isMsg {
+ copyFG.Flows.Set(kv.Key, proto.Clone(protoMsg))
+ }
+ }
+ iter = fg.Groups.IterFunc()
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpGroupEntry); isMsg {
+ copyFG.Groups.Set(kv.Key, proto.Clone(protoMsg))
+ }
+ }
+ return copyFG
+}
+
+func (fg *FlowsAndGroups) GetFlow(index int) *ofp.OfpFlowStats {
+ iter := fg.Flows.IterFunc()
+ pos := 0
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if pos == index {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpFlowStats); isMsg {
+ return protoMsg
+ }
+ return nil
+ }
+ pos += 1
+ }
+ return nil
+}
+
+func (fg *FlowsAndGroups) ListFlows() []*ofp.OfpFlowStats {
+ flows := make([]*ofp.OfpFlowStats, 0)
+ iter := fg.Flows.IterFunc()
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpFlowStats); isMsg {
+ flows = append(flows, protoMsg)
+ }
+ }
+ return flows
+}
+
+func (fg *FlowsAndGroups) ListGroups() []*ofp.OfpGroupEntry {
+ groups := make([]*ofp.OfpGroupEntry, 0)
+ iter := fg.Groups.IterFunc()
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpGroupEntry); isMsg {
+ groups = append(groups, protoMsg)
+ }
+ }
+ return groups
+}
+
+func (fg *FlowsAndGroups) String() string {
+ var buffer bytes.Buffer
+ iter := fg.Flows.IterFunc()
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpFlowStats); isMsg {
+ buffer.WriteString("\nFlow:\n")
+ buffer.WriteString(proto.MarshalTextString(protoMsg))
+ buffer.WriteString("\n")
+ }
+ }
+ iter = fg.Groups.IterFunc()
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpGroupEntry); isMsg {
+ buffer.WriteString("\nGroup:\n")
+ buffer.WriteString(proto.MarshalTextString(protoMsg))
+ buffer.WriteString("\n")
+ }
+ }
+ return buffer.String()
+}
+
+func (fg *FlowsAndGroups) AddFlow(flow *ofp.OfpFlowStats) {
+ if flow == nil {
+ return
+ }
+
+ if fg.Flows == nil {
+ fg.Flows = ordered_map.NewOrderedMap()
+ }
+ if fg.Groups == nil {
+ fg.Groups = ordered_map.NewOrderedMap()
+ }
+ //Add flow only if absent
+ if _, exist := fg.Flows.Get(flow.Id); !exist {
+ fg.Flows.Set(flow.Id, flow)
+ }
+}
+
+func (fg *FlowsAndGroups) AddGroup(group *ofp.OfpGroupEntry) {
+ if group == nil {
+ return
+ }
+
+ if fg.Flows == nil {
+ fg.Flows = ordered_map.NewOrderedMap()
+ }
+ if fg.Groups == nil {
+ fg.Groups = ordered_map.NewOrderedMap()
+ }
+ //Add group only if absent
+ if _, exist := fg.Groups.Get(group.Desc.GroupId); !exist {
+ fg.Groups.Set(group.Desc.GroupId, group)
+ }
+}
+
+//AddFrom add flows and groups from the argument into this structure only if they do not already exist
+func (fg *FlowsAndGroups) AddFrom(from *FlowsAndGroups) {
+ iter := from.Flows.IterFunc()
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpFlowStats); isMsg {
+ if _, exist := fg.Flows.Get(protoMsg.Id); !exist {
+ fg.Flows.Set(protoMsg.Id, protoMsg)
+ }
+ }
+ }
+ iter = from.Groups.IterFunc()
+ for kv, ok := iter(); ok; kv, ok = iter() {
+ if protoMsg, isMsg := kv.Value.(*ofp.OfpGroupEntry); isMsg {
+ if _, exist := fg.Groups.Get(protoMsg.Stats.GroupId); !exist {
+ fg.Groups.Set(protoMsg.Stats.GroupId, protoMsg)
+ }
+ }
+ }
+}
+
+type DeviceRules struct {
+ Rules map[string]*FlowsAndGroups
+}
+
+func NewDeviceRules() *DeviceRules {
+ var dr DeviceRules
+ dr.Rules = make(map[string]*FlowsAndGroups)
+ return &dr
+}
+
+func (dr *DeviceRules) Copy() *DeviceRules {
+ copyDR := NewDeviceRules()
+ if dr != nil {
+ for key, val := range dr.Rules {
+ if val != nil {
+ copyDR.Rules[key] = val.Copy()
+ }
+ }
+ }
+ return copyDR
+}
+
+func (dr *DeviceRules) ClearFlows(deviceId string) {
+ if _, exist := dr.Rules[deviceId]; exist {
+ dr.Rules[deviceId].Flows = ordered_map.NewOrderedMap()
+ }
+}
+
+func (dr *DeviceRules) FilterRules(deviceIds map[string]string) *DeviceRules {
+ filteredDR := NewDeviceRules()
+ for key, val := range dr.Rules {
+ if _, exist := deviceIds[key]; exist {
+ filteredDR.Rules[key] = val.Copy()
+ }
+ }
+ return filteredDR
+}
+
+func (dr *DeviceRules) AddFlow(deviceId string, flow *ofp.OfpFlowStats) {
+ if _, exist := dr.Rules[deviceId]; !exist {
+ dr.Rules[deviceId] = NewFlowsAndGroups()
+ }
+ dr.Rules[deviceId].AddFlow(flow)
+}
+
+func (dr *DeviceRules) GetRules() map[string]*FlowsAndGroups {
+ return dr.Rules
+}
+
+func (dr *DeviceRules) String() string {
+ var buffer bytes.Buffer
+ for key, value := range dr.Rules {
+ buffer.WriteString("DeviceId:")
+ buffer.WriteString(key)
+ buffer.WriteString(value.String())
+ buffer.WriteString("\n\n")
+ }
+ return buffer.String()
+}
+
+func (dr *DeviceRules) AddFlowsAndGroup(deviceId string, fg *FlowsAndGroups) {
+ if _, ok := dr.Rules[deviceId]; !ok {
+ dr.Rules[deviceId] = NewFlowsAndGroups()
+ }
+ dr.Rules[deviceId] = fg
+}
+
+// CreateEntryIfNotExist creates a new deviceId in the Map if it does not exist and assigns an
+// empty FlowsAndGroups to it. Otherwise, it does nothing.
+func (dr *DeviceRules) CreateEntryIfNotExist(deviceId string) {
+ if _, ok := dr.Rules[deviceId]; !ok {
+ dr.Rules[deviceId] = NewFlowsAndGroups()
+ }
+}
+
+/*
+ * Common flow routines
+ */
+
+//FindOverlappingFlows return a list of overlapping flow(s) where mod is the flow request
+func FindOverlappingFlows(flows []*ofp.OfpFlowStats, mod *ofp.OfpFlowMod) []*ofp.OfpFlowStats {
+ return nil //TODO - complete implementation
+}
+
+// FindFlowById returns the index of the flow in the flows array if present. Otherwise, it returns -1
+func FindFlowById(flows []*ofp.OfpFlowStats, flow *ofp.OfpFlowStats) int {
+ for idx, f := range flows {
+ if flow.Id == f.Id {
+ return idx
+ }
+ }
+ return -1
+}
+
+// FindFlows returns the index in flows where flow if present. Otherwise, it returns -1
+func FindFlows(flows []*ofp.OfpFlowStats, flow *ofp.OfpFlowStats) int {
+ for idx, f := range flows {
+ if FlowMatch(f, flow) {
+ return idx
+ }
+ }
+ return -1
+}
+
+//FlowMatch returns true if two flows matches on the following flow attributes:
+//TableId, Priority, Flags, Cookie, Match
+func FlowMatch(f1 *ofp.OfpFlowStats, f2 *ofp.OfpFlowStats) bool {
+ if f1 == nil || f2 == nil {
+ return false
+ }
+ keysMatter := []string{"TableId", "Priority", "Flags", "Cookie", "Match"}
+ for _, key := range keysMatter {
+ switch key {
+ case "TableId":
+ if f1.TableId != f2.TableId {
+ return false
+ }
+ case "Priority":
+ if f1.Priority != f2.Priority {
+ return false
+ }
+ case "Flags":
+ if f1.Flags != f2.Flags {
+ return false
+ }
+ case "Cookie":
+ if f1.Cookie != f2.Cookie {
+ return false
+ }
+ case "Match":
+ if strings.Compare(f1.Match.String(), f2.Match.String()) != 0 {
+ return false
+ }
+ }
+ }
+ return true
+}
+
+//FlowMatchesMod returns True if given flow is "covered" by the wildcard flow_mod, taking into consideration of
+//both exact matches as well as masks-based match fields if any. Otherwise return False
+func FlowMatchesMod(flow *ofp.OfpFlowStats, mod *ofp.OfpFlowMod) bool {
+ if flow == nil || mod == nil {
+ return false
+ }
+ //Check if flow.cookie is covered by mod.cookie and mod.cookie_mask
+ if (flow.Cookie & mod.CookieMask) != (mod.Cookie & mod.CookieMask) {
+ return false
+ }
+
+ //Check if flow.table_id is covered by flow_mod.table_id
+ if mod.TableId != uint32(ofp.OfpTable_OFPTT_ALL) && flow.TableId != mod.TableId {
+ return false
+ }
+
+ //Check out_port
+ if (mod.OutPort&0x7fffffff) != uint32(ofp.OfpPortNo_OFPP_ANY) && !FlowHasOutPort(flow, mod.OutPort) {
+ return false
+ }
+
+ // Check out_group
+ if (mod.OutGroup&0x7fffffff) != uint32(ofp.OfpGroup_OFPG_ANY) && !FlowHasOutGroup(flow, mod.OutGroup) {
+ return false
+ }
+
+ //Priority is ignored
+
+ //Check match condition
+ //If the flow_mod match field is empty, that is a special case and indicates the flow entry matches
+ if (mod.Match == nil) || (mod.Match.OxmFields == nil) || (len(mod.Match.OxmFields) == 0) {
+ //If we got this far and the match is empty in the flow spec, than the flow matches
+ return true
+ } // TODO : implement the flow match analysis
+ return false
+
+}
+
+//FlowHasOutPort returns True if flow has a output command with the given out_port
+func FlowHasOutPort(flow *ofp.OfpFlowStats, outPort uint32) bool {
+ if flow == nil {
+ return false
+ }
+ for _, instruction := range flow.Instructions {
+ if instruction.Type == uint32(ofp.OfpInstructionType_OFPIT_APPLY_ACTIONS) {
+ if instruction.GetActions() == nil {
+ return false
+ }
+ for _, action := range instruction.GetActions().Actions {
+ if action.Type == ofp.OfpActionType_OFPAT_OUTPUT {
+ if (action.GetOutput() != nil) && (action.GetOutput().Port == outPort) {
+ return true
+ }
+ }
+
+ }
+ }
+ }
+ return false
+}
+
+//FlowHasOutGroup return True if flow has a output command with the given out_group
+func FlowHasOutGroup(flow *ofp.OfpFlowStats, groupID uint32) bool {
+ if flow == nil {
+ return false
+ }
+ for _, instruction := range flow.Instructions {
+ if instruction.Type == uint32(ofp.OfpInstructionType_OFPIT_APPLY_ACTIONS) {
+ if instruction.GetActions() == nil {
+ return false
+ }
+ for _, action := range instruction.GetActions().Actions {
+ if action.Type == ofp.OfpActionType_OFPAT_GROUP {
+ if (action.GetGroup() != nil) && (action.GetGroup().GroupId == groupID) {
+ return true
+ }
+ }
+
+ }
+ }
+ }
+ return false
+}
+
+//FindGroup returns index of group if found, else returns -1
+func FindGroup(groups []*ofp.OfpGroupEntry, groupId uint32) int {
+ for idx, group := range groups {
+ if group.Desc.GroupId == groupId {
+ return idx
+ }
+ }
+ return -1
+}
+
+func FlowsDeleteByGroupId(flows []*ofp.OfpFlowStats, groupId uint32) (bool, []*ofp.OfpFlowStats) {
+ toKeep := make([]*ofp.OfpFlowStats, 0)
+
+ for _, f := range flows {
+ if !FlowHasOutGroup(f, groupId) {
+ toKeep = append(toKeep, f)
+ }
+ }
+ return len(toKeep) < len(flows), toKeep
+}
+
+func ToOfpOxmField(from []*ofp.OfpOxmOfbField) []*ofp.OfpOxmField {
+ matchFields := make([]*ofp.OfpOxmField, 0)
+ for _, val := range from {
+ matchFields = append(matchFields, &ofp.OfpOxmField{Field: &ofp.OfpOxmField_OfbField{OfbField: val}})
+ }
+ return matchFields
+}