tools/xappmock/sender/jsonSender.go

   1 Binary file (standard input) matches
   2
   3 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
   4 //  platform project (RICP).
   5
   6 // Copyright 2019 Nokia
   7 //
   8 // Licensed under the Apache License, Version 2.0 (the "License");
   9 // you may not use this file except in compliance with the License.
  10 // You may obtain a copy of the License at
  11 //
  12 //      http://www.apache.org/licenses/LICENSE-2.0
  13 //
  14 // Unless required by applicable law or agreed to in writing, software
  15 // distributed under the License is distributed on an "AS IS" BASIS,
  16 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17 // See the License for the specific language governing permissions and
  18 // limitations under the License.
  19 //
  20 package sender
  21
  22 import (
  23         "fmt"
  24         "github.com/pkg/errors"
  25         "os"
  26         "reflect"
  27         "strconv"
  28         "strings"
  29         "sync/atomic"
  30         "time"
  31         "unicode"
  32         "xappmock/logger"
  33         "xappmock/models"
  34         "xappmock/rmr"
  35 )
  36
  37 var counter uint64
  38
  39 type JsonSender struct {
  40         logger *logger.Logger
  41 }
  42
  43 func NewJsonSender(logger *logger.Logger) *JsonSender {
  44         return &JsonSender{
  45                 logger: logger,
  46         }
  47 }
  48
  49 func (s *JsonSender) SendJsonRmrMessage(command models.JsonCommand /*the copy is modified locally*/, xAction *[]byte, r *rmr.Service) error {
  50         var payload []byte
  51         _, err := fmt.Sscanf(command.PackedPayload, "%x", &payload)
  52         if err != nil {
  53                 return errors.New(fmt.Sprintf("convert inputPayloadAsStr to payloadAsByte. Error: %v\n", err))
  54         }
  55         command.PackedPayload = string(payload)
  56         command.TransactionId = expandTransactionId(command.TransactionId)
  57         if len(command.TransactionId) == 0 {
  58                 command.TransactionId = string(*xAction)
  59         }
  60         command.PayloadHeader = s.expandPayloadHeader(command.PayloadHeader, &command)
  61         s.logger.Infof("#JsonSender.SendJsonRmrMessage - command payload header: %s", command.PayloadHeader)
  62         rmrMsgId, err := rmr.MessageIdToUint(command.RmrMessageType)
  63         if err != nil {
  64                 return errors.New(fmt.Sprintf("invalid rmr message id: %s", command.RmrMessageType))
  65         }
  66
  67         msg := append([]byte(command.PayloadHeader), payload...)
  68         messageInfo := models.NewMessageInfo(int(rmrMsgId), command.RanName, msg, []byte(command.TransactionId))
  69         s.logger.Infof("#JsonSender.SendJsonRmrMessage - going to send message: %s", messageInfo)
  70
  71         _, err = r.SendMessage(int(rmrMsgId), command.RanName, msg, []byte(command.TransactionId))
  72         return err
  73 }
  74
  75 /*
  76  * transactionId (xAction): The value may have a fixed value or $ or <prefix>$.
  77  * $ is replaced by a value generated at runtime (possibly unique per message sent).
  78  * If the tag does not exist, then the mock shall use the value taken from the incoming message.
  79  */
  80 func expandTransactionId(id string) string {
  81         if len(id) == 1 && id[0] == '$' {
  82                 return fmt.Sprintf("%d", incAndGetCounter())
  83         }
  84         if len(id) > 1 && id[len(id)-1] == '$' {
  85                 return fmt.Sprintf("%s%d", id[:len(id)-1], incAndGetCounter())
  86         }
  87         return id
  88 }
  89
  90 /*
  91  * payloadHeader: A prefix to combine with the payload that will be the message’s payload. The value may include variables of the format $<name> or #<name> where:
  92  *   $<name> expands to the value of <name> if it exists or the empty string if not.
  93  *   #<name> expands to the length of the value of <name> if it exists or omitted if not.
  94  * The intention is to allow the Mock to construct the payload header required by the setup messages (ranIp|ranPort|ranName|payload len|<payload>).
  95  * Example: “payloadHeader”: “$ranIp|$ranPort|$ranName|#packedPayload|”
  96  */
  97
  98 func (s *JsonSender) expandPayloadHeader(header string, command *models.JsonCommand) string {
  99         var name strings.Builder
 100         var expandedHeader strings.Builder
 101
 102         r := strings.NewReader(header)
 103         ch, err := r.ReadByte()
 104         for {
 105                 if err != nil {
 106                         break
 107                 }
 108
 109                 switch ch {
 110                 case '$':
 111                         for {
 112                                 ch, err = r.ReadByte() //on error ch == 0
 113                                 if unicode.IsDigit(rune(ch)) || unicode.IsLetter(rune(ch)) {
 114                                         if name.Len() == 0 {
 115                                                 name.WriteByte(byte(unicode.ToUpper(rune(ch))))
 116                                         } else {
 117                                                 name.WriteByte(ch)
 118                                         }
 119                                 } else {
 120                                         if fieldValue := reflect.Indirect(reflect.ValueOf(command)).FieldByName(name.String()); fieldValue.IsValid() {
 121                                                 switch fieldValue.Kind() {
 122                                                 case reflect.String:
 123                                                         expandedHeader.WriteString(fieldValue.String())
 124                                                 case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 125                                                         expandedHeader.WriteString(strconv.FormatInt(fieldValue.Int(), 10))
 126                                                 case reflect.Bool:
 127                                                         expandedHeader.WriteString(strconv.FormatBool(fieldValue.Bool()))
 128                                                 case reflect.Float64, reflect.Float32:
 129                                                         expandedHeader.WriteString(fmt.Sprintf("%g", fieldValue.Float()))
 130                                                 default:
 131                                                         s.logger.Errorf("#JsonSender.expandPayloadHeader - invalid type for $%s, value must be a string, an int, a bool or a float", name.String())
 132                                                         os.Exit(1)
 133                                                 }
 134                                         }
 135                                         name.Reset()
 136                                         break
 137                                 }
 138                         }
 139                 case '#':
 140                         for {
 141                                 ch, err = r.ReadByte() //on error ch == 0
 142                                 if unicode.IsDigit(rune(ch)) || unicode.IsLetter(rune(ch)) {
 143                                         if name.Len() == 0 {
 144                                                 name.WriteByte(byte(unicode.ToUpper(rune(ch))))
 145                                         } else {
 146                                                 name.WriteByte(ch)
 147                                         }
 148                                 } else {
 149                                         if fieldValue := reflect.Indirect(reflect.ValueOf(command)).FieldByName(name.String()); fieldValue.IsValid() {
 150                                                 if fieldValue.Kind() == reflect.String {
 151                                                         expandedHeader.WriteString(strconv.FormatInt(int64(len(fieldValue.String())), 10))
 152                                                 } else {
 153                                                         s.logger.Errorf("#JsonSender.expandPayloadHeader - invalid type for #%s, value must be a string", name.String())
 154                                                         os.Exit(1)
 155                                                 }
 156                                         }
 157                                         name.Reset()
 158                                         break
 159                                 }
 160                         }
 161                 default:
 162                         if unicode.IsPrint(rune(ch)) {
 163                                 expandedHeader.WriteByte(ch)
 164                         }
 165                         ch, err = r.ReadByte()
 166                 }
 167         }
 168         return expandedHeader.String()
 169 }
 170
 171 func incAndGetCounter() uint64 {
 172         return atomic.AddUint64(&counter, 1)
 173 }
 174
 175 func init() {
 176         counter = uint64(time.Now().Unix() - 1572000000)
 177 }