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Configuration.go
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Configuration.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
*
* https://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 s7
import (
"github.com/rs/zerolog"
"strconv"
"github.com/pkg/errors"
)
type Configuration struct {
localRack int32
localSlot int32
remoteRack int32
remoteSlot int32
pduSize uint16
maxAmqCaller uint16
maxAmqCallee uint16
controllerType ControllerType
}
func ParseFromOptions(localLog zerolog.Logger, options map[string][]string) (Configuration, error) {
configuration := Configuration{
localRack: 1,
localSlot: 1,
remoteRack: 0,
remoteSlot: 0,
pduSize: 1024,
maxAmqCaller: 8,
maxAmqCallee: 8,
controllerType: ControllerType_UNKNOWN,
}
if localRackString := getFromOptions(localLog, options, "local-rack"); localRackString != "" {
parsedInt, err := strconv.ParseInt(localRackString, 10, 32)
if err != nil {
return Configuration{}, errors.Wrap(err, "Error parsing local-rack")
}
configuration.localRack = int32(parsedInt)
}
if localSlotString := getFromOptions(localLog, options, "local-slot"); localSlotString != "" {
parsedInt, err := strconv.ParseInt(localSlotString, 10, 32)
if err != nil {
return Configuration{}, errors.Wrap(err, "Error parsing local-slot")
}
configuration.localSlot = int32(parsedInt)
}
if remoteRackString := getFromOptions(localLog, options, "remote-rack"); remoteRackString != "" {
parsedInt, err := strconv.ParseInt(remoteRackString, 10, 32)
if err != nil {
return Configuration{}, errors.Wrap(err, "Error parsing remote-rack")
}
configuration.remoteRack = int32(parsedInt)
}
if remoteSlotString := getFromOptions(localLog, options, "remote-slot"); remoteSlotString != "" {
parsedInt, err := strconv.ParseInt(remoteSlotString, 10, 32)
if err != nil {
return Configuration{}, errors.Wrap(err, "Error parsing remote-slot")
}
configuration.remoteSlot = int32(parsedInt)
}
if controllerTypeString := getFromOptions(localLog, options, "controller-type"); controllerTypeString != "" {
switch controllerTypeString {
case "ANY":
configuration.controllerType = ControllerType_ANY
case "S7_200":
configuration.controllerType = ControllerType_S7_200
case "S7_300":
configuration.controllerType = ControllerType_S7_300
case "S7_400":
configuration.controllerType = ControllerType_S7_400
case "S7_1200":
configuration.controllerType = ControllerType_S7_1200
case "S7_1500":
configuration.controllerType = ControllerType_S7_1500
case "LOGO":
configuration.controllerType = ControllerType_LOGO
default:
return Configuration{}, errors.Errorf("Unknown controller type %s", controllerTypeString)
}
}
pduSizeString := getFromOptions(localLog, options, "pdu-size")
if pduSizeString != "" {
parsedUint, err := strconv.ParseUint(pduSizeString, 10, 16)
if err != nil {
return Configuration{}, errors.Wrapf(err, "Error parsing pdu-size %s", pduSizeString)
}
configuration.pduSize = uint16(parsedUint)
}
if maxAmqCallerString := getFromOptions(localLog, options, "max-amq-caller"); maxAmqCallerString != "" {
parsedUint, err := strconv.ParseUint(maxAmqCallerString, 10, 16)
if err != nil {
return Configuration{}, errors.Wrapf(err, "Error parsing max-amq-caller %s", maxAmqCallerString)
}
configuration.maxAmqCaller = uint16(parsedUint)
}
if maxAmqCalleeString := getFromOptions(localLog, options, "max-amq-callee"); maxAmqCalleeString != "" {
parsedUint, err := strconv.ParseUint(maxAmqCalleeString, 10, 16)
if err != nil {
return Configuration{}, errors.Wrapf(err, "Error parsing max-amq-callee %s", maxAmqCalleeString)
}
configuration.maxAmqCallee = uint16(parsedUint)
}
return configuration, nil
}
func getFromOptions(localLog zerolog.Logger, options map[string][]string, key string) string {
if optionValues, ok := options[key]; ok {
if len(optionValues) <= 0 {
return ""
}
if len(optionValues) > 1 {
localLog.Warn().Str("key", key).Msg("Options %s must be unique")
}
return optionValues[0]
}
return ""
}