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packet.go
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packet.go
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// -*- coding: utf-8 -*-
// Copyright (C) 2018 Nippon Telegraph and Telephone Corporation.
//
// 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 gonslib
import (
"fabricflow/fibc/api"
"fabricflow/fibc/net"
"github.com/beluganos/go-opennsl/opennsl"
log "github.com/sirupsen/logrus"
)
const (
packetRxPri = 10
packetRxSize = 16 * 1024
packetRxPerChan = 10
packerRxChans = 4
packetRxPps = 30000
packetTxPadsize = 4
)
//
// RxInit initialize opennsl rx function.
//
func RxInit(unit int) error {
pcfg, err := opennsl.PortConfigGet(unit)
if err != nil {
log.Errorf("Server: RxInit: PortConfigGet error. %s", err)
return err
}
bmp, _ := pcfg.PBmp(opennsl.PORT_CONFIG_CPU)
if err := opennsl.VlanDefaultMustGet(unit).PortAdd(unit, bmp, bmp); err != nil {
log.Errorf("DEFAULT_VLAN.PortAdd. %s", err)
return err
}
log.Infof("Rx init ok.")
return nil
}
//
// RxStart starts receiving packets.
//
func (s *Server) RxStart(done <-chan struct{}) <-chan *opennsl.Pkt {
rxCh := make(chan *opennsl.Pkt)
go RxServe(s.Unit(), rxCh, done)
return rxCh
}
//
// RxServe serve receiving packets.
//
func RxServe(unit int, rxCh chan<- *opennsl.Pkt, done <-chan struct{}) {
flg := opennsl.NewRxCallbackFlags(fieldCosDefault)
err := opennsl.RxRegister(unit, packetRxPri, flg, func(unit int, pkt *opennsl.Pkt) {
rxCh <- pkt
})
if err != nil {
log.Errorf("Server: RxPacket: RxRegister error. %s", err)
return
}
defer opennsl.RxUnregister(unit, packetRxPri)
if active := opennsl.RxActive(unit); !active {
cfg := opennsl.NewRxCfg()
cfg.SetPktSize(packetRxSize)
cfg.SetPktsPerChain(packetRxPerChan)
cfg.SetGlobalPps(packetRxPps)
cfg.ChanCfg(1).SetChains(packerRxChans)
// cfg.ChanCfg(1).SetCosBmp(0xffffffff)
if err := opennsl.RxStart(unit, cfg); err != nil {
log.Errorf("Server: RxPacket: RxStart error. %s", err)
return
}
defer cfg.Stop(unit)
log.Infof("Server: RxPacket: activated.")
}
log.Infof("Server: RxPacket: Started.")
<-done
log.Infof("Server: RxPacket: Exit")
}
//
// FIBCFFPacketOut process FFPacketOUT message from fibcd.
//
func (s *Server) FIBCFFPacketOut(hdr *fibcnet.Header, pktout *fibcapi.FFPacketOut) {
log.Debugf("Server: PacketOUT: %v %d %d", hdr, pktout.GetPortNo(), len(pktout.Data))
pkt, err := opennsl.PktAlloc(s.Unit(), len(pktout.Data)+packetTxPadsize, opennsl.PKT_F_NONE)
if err != nil {
log.Errorf("Server: PacketOut: PktAlloc error. %s", err)
return
}
defer pkt.Free(s.Unit())
if err := pkt.Memcpy(0, pktout.GetData()); err != nil {
log.Errorf("Server: PacketOut: Memcpy error. %s", err)
return
}
pkt.TxPBmp().Clear()
pkt.TxPBmp().Add(opennsl.Port(pktout.GetPortNo()))
if err := pkt.Tx(s.Unit()); err != nil {
log.Errorf("Server: PacketOut: Send error. %s", err)
return
}
}