/
services.go
548 lines (493 loc) · 17.4 KB
/
services.go
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/*
* 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 devices
import (
"encoding/hex"
"github.com/looplab/fsm"
"github.com/opencord/bbsim/internal/bbsim/packetHandlers"
"github.com/opencord/bbsim/internal/bbsim/responders/dhcp"
"github.com/opencord/bbsim/internal/bbsim/responders/eapol"
"github.com/opencord/bbsim/internal/bbsim/responders/igmp"
bbsimTypes "github.com/opencord/bbsim/internal/bbsim/types"
"github.com/opencord/bbsim/internal/common"
log "github.com/sirupsen/logrus"
"net"
"time"
)
var serviceLogger = log.WithFields(log.Fields{
"module": "SERVICE",
})
// time to wait before fail EAPOL/DHCP
// (it's a variable and not a constant so it can be overridden in the tests)
var eapolWaitTime = 60 * time.Second
var dhcpWaitTime = 60 * time.Second
type ServiceIf interface {
HandlePackets() // start listening on the PacketCh
HandleAuth() // Sends the EapoStart packet
HandleDhcp(pbit uint8, cTag int) // Sends the DHCPDiscover packet
Initialize(stream bbsimTypes.Stream)
Disable()
}
type Service struct {
Name string
HwAddress net.HardwareAddr
Onu *Onu
CTag int
STag int
NeedsEapol bool
NeedsDhcp bool
NeedsIgmp bool
TechnologyProfileID int
UniTagMatch int
ConfigureMacAddress bool
UsPonCTagPriority uint8
UsPonSTagPriority uint8
DsPonCTagPriority uint8
DsPonSTagPriority uint8
// state
GemPort uint32
InternalState *fsm.FSM
EapolState *fsm.FSM
DHCPState *fsm.FSM
IGMPState *fsm.FSM
Channel chan bbsimTypes.Message // drive Service lifecycle
PacketCh chan bbsimTypes.OnuPacketMessage // handle packets
Stream bbsimTypes.Stream // the gRPC stream to communicate with the adapter, created in the initialize transition
}
func NewService(name string, hwAddress net.HardwareAddr, onu *Onu, cTag int, sTag int,
needsEapol bool, needsDchp bool, needsIgmp bool, tpID int, uniTagMatch int, configMacAddress bool,
usPonCTagPriority uint8, usPonSTagPriority uint8, dsPonCTagPriority uint8, dsPonSTagPriority uint8) (*Service, error) {
service := Service{
Name: name,
HwAddress: hwAddress,
Onu: onu,
CTag: cTag,
STag: sTag,
NeedsEapol: needsEapol,
NeedsDhcp: needsDchp,
NeedsIgmp: needsIgmp,
TechnologyProfileID: tpID,
UniTagMatch: uniTagMatch,
ConfigureMacAddress: configMacAddress,
UsPonCTagPriority: usPonCTagPriority,
UsPonSTagPriority: usPonSTagPriority,
DsPonCTagPriority: dsPonCTagPriority,
DsPonSTagPriority: dsPonSTagPriority,
}
service.InternalState = fsm.NewFSM(
"created",
fsm.Events{
{Name: "initialized", Src: []string{"created", "disabled"}, Dst: "initialized"},
{Name: "disabled", Src: []string{"initialized"}, Dst: "disabled"},
},
fsm.Callbacks{
"enter_state": func(e *fsm.Event) {
service.logStateChange("InternalState", e.Src, e.Dst)
},
"enter_initialized": func(e *fsm.Event) {
stream, ok := e.Args[0].(bbsimTypes.Stream)
if !ok {
serviceLogger.Fatal("initialize invoke with wrong arguments")
}
service.Stream = stream
service.PacketCh = make(chan bbsimTypes.OnuPacketMessage)
service.Channel = make(chan bbsimTypes.Message)
go service.HandlePackets()
go service.HandleChannel()
},
"enter_disabled": func(e *fsm.Event) {
// reset the state machines
service.EapolState.SetState("created")
service.DHCPState.SetState("created")
// stop listening for packets
close(service.PacketCh)
close(service.Channel)
service.PacketCh = nil
service.Channel = nil
},
},
)
service.EapolState = fsm.NewFSM(
"created",
fsm.Events{
{Name: "start_auth", Src: []string{"created", "eap_response_success_received", "auth_failed"}, Dst: "auth_started"},
{Name: "eap_start_sent", Src: []string{"auth_started"}, Dst: "eap_start_sent"},
{Name: "eap_response_identity_sent", Src: []string{"eap_start_sent"}, Dst: "eap_response_identity_sent"},
{Name: "eap_response_challenge_sent", Src: []string{"eap_response_identity_sent"}, Dst: "eap_response_challenge_sent"},
{Name: "eap_response_success_received", Src: []string{"eap_response_challenge_sent"}, Dst: "eap_response_success_received"},
{Name: "auth_failed", Src: []string{"auth_started", "eap_start_sent", "eap_response_identity_sent", "eap_response_challenge_sent"}, Dst: "auth_failed"},
},
fsm.Callbacks{
"enter_state": func(e *fsm.Event) {
service.logStateChange("EapolState", e.Src, e.Dst)
},
"before_start_auth": func(e *fsm.Event) {
msg := bbsimTypes.Message{
Type: bbsimTypes.StartEAPOL,
}
service.Channel <- msg
},
"enter_auth_started": func(e *fsm.Event) {
go func() {
for {
select {
case <-service.Onu.PonPort.Olt.enableContext.Done():
// if the OLT is disabled, then cancel
return
case <-time.After(eapolWaitTime):
if service.EapolState.Current() != "eap_response_success_received" {
serviceLogger.WithFields(log.Fields{
"OnuId": service.Onu.ID,
"IntfId": service.Onu.PonPortID,
"OnuSn": service.Onu.Sn(),
"Name": service.Name,
"EapolState": service.EapolState.Current(),
}).Warn("EAPOL failed, resetting EAPOL State")
_ = service.EapolState.Event("auth_failed")
if common.Config.BBSim.AuthRetry {
_ = service.EapolState.Event("start_auth")
}
return
}
}
}
}()
},
},
)
service.DHCPState = fsm.NewFSM(
"created",
fsm.Events{
// TODO only allow transitions to dhcp_start from success or failure, not in-between states
// TODO forcefully fail DHCP if we don't get an ack in X seconds
{Name: "start_dhcp", Src: []string{"created", "dhcp_ack_received", "dhcp_failed"}, Dst: "dhcp_started"},
{Name: "dhcp_discovery_sent", Src: []string{"dhcp_started"}, Dst: "dhcp_discovery_sent"},
{Name: "dhcp_request_sent", Src: []string{"dhcp_discovery_sent"}, Dst: "dhcp_request_sent"},
{Name: "dhcp_ack_received", Src: []string{"dhcp_request_sent"}, Dst: "dhcp_ack_received"},
{Name: "dhcp_failed", Src: []string{"dhcp_started", "dhcp_discovery_sent", "dhcp_request_sent"}, Dst: "dhcp_failed"},
},
fsm.Callbacks{
"enter_state": func(e *fsm.Event) {
service.logStateChange("DHCPState", e.Src, e.Dst)
},
"before_start_dhcp": func(e *fsm.Event) {
msg := bbsimTypes.Message{
Type: bbsimTypes.StartDHCP,
}
service.Channel <- msg
},
"enter_dhcp_started": func(e *fsm.Event) {
go func() {
for {
select {
case <-service.Onu.PonPort.Olt.enableContext.Done():
// if the OLT is disabled, then cancel
return
case <-time.After(dhcpWaitTime):
if service.DHCPState.Current() != "dhcp_ack_received" {
serviceLogger.WithFields(log.Fields{
"OnuId": service.Onu.ID,
"IntfId": service.Onu.PonPortID,
"OnuSn": service.Onu.Sn(),
"Name": service.Name,
"DHCPState": service.DHCPState.Current(),
}).Warn("DHCP failed, resetting DHCP State")
_ = service.DHCPState.Event("dhcp_failed")
if common.Config.BBSim.DhcpRetry {
_ = service.DHCPState.Event("start_dhcp")
}
return
}
}
}
}()
},
},
)
service.IGMPState = fsm.NewFSM(
"created",
fsm.Events{
{Name: "igmp_join_start", Src: []string{"created", "igmp_left", "igmp_join_error", "igmp_join_started"}, Dst: "igmp_join_started"},
{Name: "igmp_join_startv3", Src: []string{"igmp_left", "igmp_join_error", "igmp_join_started"}, Dst: "igmp_join_started"},
{Name: "igmp_join_error", Src: []string{"igmp_join_started"}, Dst: "igmp_join_error"},
{Name: "igmp_leave", Src: []string{"igmp_join_started"}, Dst: "igmp_left"},
},
fsm.Callbacks{
"igmp_join_start": func(e *fsm.Event) {
igmpInfo, _ := e.Args[0].(bbsimTypes.IgmpMessage)
msg := bbsimTypes.Message{
Type: bbsimTypes.IGMPMembershipReportV2,
Data: bbsimTypes.IgmpMessage{
GroupAddress: igmpInfo.GroupAddress,
},
}
service.Channel <- msg
},
"igmp_leave": func(e *fsm.Event) {
igmpInfo, _ := e.Args[0].(bbsimTypes.IgmpMessage)
msg := bbsimTypes.Message{
Type: bbsimTypes.IGMPLeaveGroup,
Data: bbsimTypes.IgmpMessage{
GroupAddress: igmpInfo.GroupAddress,
},
}
service.Channel <- msg
},
"igmp_join_startv3": func(e *fsm.Event) {
igmpInfo, _ := e.Args[0].(bbsimTypes.IgmpMessage)
msg := bbsimTypes.Message{
Type: bbsimTypes.IGMPMembershipReportV3,
Data: bbsimTypes.IgmpMessage{
GroupAddress: igmpInfo.GroupAddress,
},
}
service.Channel <- msg
},
},
)
return &service, nil
}
// HandleAuth is used to start EAPOL for a particular Service when the corresponding flow is received
func (s *Service) HandleAuth() {
if !s.NeedsEapol {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"NeedsEapol": s.NeedsEapol,
}).Debug("Won't start authentication as EAPOL is not required")
return
}
if err := s.EapolState.Event("start_auth"); err != nil {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"err": err.Error(),
}).Error("Can't start auth for this Service")
}
}
// HandleDhcp is used to start DHCP for a particular Service when the corresponding flow is received
func (s *Service) HandleDhcp(pbit uint8, cTag int) {
if s.CTag != cTag || (s.UsPonCTagPriority != pbit && pbit != 255) {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
}).Trace("DHCP flow is not for this service, ignoring")
return
}
if !s.NeedsDhcp {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"NeedsDhcp": s.NeedsDhcp,
}).Trace("Won't start DHCP as it is not required")
return
}
// TODO check if the DHCP flow was received before starting auth
if err := s.DHCPState.Event("start_dhcp"); err != nil {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"err": err.Error(),
}).Error("Can't start DHCP for this Service")
}
}
func (s *Service) HandlePackets() {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"GemPortId": s.GemPort,
"Name": s.Name,
}).Debug("Listening on Service Packet Channel")
defer func() {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"GemPortId": s.GemPort,
"Name": s.Name,
}).Debug("Done Listening on Service Packet Channel")
}()
for msg := range s.PacketCh {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"messageType": msg.Type,
}).Trace("Received message on Service Packet Channel")
if msg.Type == packetHandlers.EAPOL {
eapol.HandleNextPacket(msg.OnuId, msg.IntfId, s.GemPort, s.Onu.Sn(), s.Onu.PortNo, s.EapolState, msg.Packet, s.Stream, nil)
} else if msg.Type == packetHandlers.DHCP {
_ = dhcp.HandleNextPacket(s.Onu.ID, s.Onu.PonPortID, s.Name, s.Onu.Sn(), s.Onu.PortNo, s.CTag, s.GemPort, s.HwAddress, s.DHCPState, msg.Packet, s.UsPonCTagPriority, s.Stream)
} else if msg.Type == packetHandlers.IGMP {
log.Warn(hex.EncodeToString(msg.Packet.Data()))
_ = igmp.HandleNextPacket(s.Onu.PonPortID, s.Onu.ID, s.Onu.Sn(), s.Onu.PortNo, s.GemPort, s.HwAddress, msg.Packet, s.CTag, s.UsPonCTagPriority, s.Stream)
}
}
}
func (s *Service) HandleChannel() {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"GemPortId": s.GemPort,
"Name": s.Name,
}).Debug("Listening on Service Channel")
defer func() {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"GemPortId": s.GemPort,
"Name": s.Name,
}).Debug("Done Listening on Service Channel")
}()
for msg := range s.Channel {
switch msg.Type {
case bbsimTypes.StartEAPOL:
if err := s.handleEapolStart(s.Stream); err != nil {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"err": err,
}).Error("Error while sending EapolStart packet")
_ = s.EapolState.Event("auth_failed")
}
case bbsimTypes.StartDHCP:
if err := s.handleDHCPStart(s.Stream); err != nil {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"err": err,
}).Error("Error while sending DHCPDiscovery packet")
_ = s.DHCPState.Event("dhcp_failed")
}
case bbsimTypes.IGMPMembershipReportV2:
igmpInfo, _ := msg.Data.(bbsimTypes.IgmpMessage)
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
}).Debug("Received IGMPMembershipReportV2 message on ONU channel")
_ = igmp.SendIGMPMembershipReportV2(s.Onu.PonPortID, s.Onu.ID, s.Onu.Sn(), s.Onu.PortNo, s.GemPort, s.HwAddress, s.CTag, s.UsPonCTagPriority, s.Stream, igmpInfo.GroupAddress)
case bbsimTypes.IGMPLeaveGroup:
igmpInfo, _ := msg.Data.(bbsimTypes.IgmpMessage)
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
}).Debug("Received IGMPLeaveGroupV2 message on ONU channel")
_ = igmp.SendIGMPLeaveGroupV2(s.Onu.PonPortID, s.Onu.ID, s.Onu.Sn(), s.Onu.PortNo, s.GemPort, s.HwAddress, s.CTag, s.UsPonCTagPriority, s.Stream, igmpInfo.GroupAddress)
case bbsimTypes.IGMPMembershipReportV3:
igmpInfo, _ := msg.Data.(bbsimTypes.IgmpMessage)
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
}).Debug("Received IGMPMembershipReportV3 message on ONU channel")
_ = igmp.SendIGMPMembershipReportV3(s.Onu.PonPortID, s.Onu.ID, s.Onu.Sn(), s.Onu.PortNo, s.GemPort, s.HwAddress, s.CTag, s.UsPonCTagPriority, s.Stream, igmpInfo.GroupAddress)
}
}
}
func (s *Service) Initialize(stream bbsimTypes.Stream) {
if err := s.InternalState.Event("initialized", stream); err != nil {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"Err": err,
}).Error("Cannot initialize service")
}
}
func (s *Service) Disable() {
if err := s.InternalState.Event("disabled"); err != nil {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"Err": err,
}).Error("Cannot disable service")
}
}
func (s *Service) handleEapolStart(stream bbsimTypes.Stream) error {
// TODO fail Auth if it does not succeed in 30 seconds
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"GemPort": s.GemPort,
"Name": s.Name,
}).Trace("handleEapolStart")
if err := eapol.SendEapStart(s.Onu.ID, s.Onu.PonPortID, s.Onu.Sn(), s.Onu.PortNo,
s.HwAddress, s.GemPort, s.EapolState, stream); err != nil {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"GemPort": s.GemPort,
"Name": s.Name,
}).Error("handleEapolStart")
return err
}
return nil
}
func (s *Service) handleDHCPStart(stream bbsimTypes.Stream) error {
// TODO fail DHCP if it does not succeed in 30 seconds
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"GemPortId": s.GemPort,
}).Debugf("HandleDHCPStart")
if err := dhcp.SendDHCPDiscovery(s.Onu.PonPortID, s.Onu.ID, s.Name, int(s.CTag), s.GemPort,
s.Onu.Sn(), s.Onu.PortNo, s.DHCPState, s.HwAddress, s.UsPonCTagPriority, stream); err != nil {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
"GemPortId": s.GemPort,
}).Error("HandleDHCPStart")
return err
}
return nil
}
func (s *Service) logStateChange(stateMachine string, src string, dst string) {
serviceLogger.WithFields(log.Fields{
"OnuId": s.Onu.ID,
"IntfId": s.Onu.PonPortID,
"OnuSn": s.Onu.Sn(),
"Name": s.Name,
}).Debugf("Changing Service.%s InternalState from %s to %s", stateMachine, src, dst)
}