[RICPLT-2048] X2 ENDC Setup request refactoring

[ric-plt/e2mgr.git] / E2Manager / e2pdus / x2_setup_requests.go

diff --git a/E2Manager/e2pdus/x2_setup_requests.go b/E2Manager/e2pdus/x2_setup_requests.go
index 938506b..b22e59d 100644 (file)
--- a/E2Manager/e2pdus/x2_setup_requests.go
+++ b/E2Manager/e2pdus/x2_setup_requests.go
@@ -25,10 +25,12 @@ import "C"
 import (
        "fmt"
        "github.com/pkg/errors"
+       "os"
        "unsafe"
 )
 
 const (
+       EnvRicId          = "RIC_ID"
        ShortMacro_eNB_ID = 18
        Macro_eNB_ID      = 20
        LongMacro_eNB_ID  = 21
@@ -40,7 +42,13 @@ var PackedX2setupRequest []byte
 var PackedEndcX2setupRequestAsString string
 var PackedX2setupRequestAsString string
 
-func PreparePackedEndcX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessageBufferSize int, pLMNId []byte, eNB_Id []byte /*18, 20, 21, 28 bits length*/, bitqty uint, ricFlag []byte) ([]byte, string, error) {
+/*The Ric Id is the combination of pLMNId and ENBId*/
+var pLMNId []byte
+var eNBId []byte
+var eNBIdBitqty uint
+var ricFlag = []byte{0xbb, 0xbc, 0xcc} /*pLMNId [3]bytes*/
+
+func preparePackedEndcX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessageBufferSize int, pLMNId []byte, eNB_Id []byte /*18, 20, 21, 28 bits length*/, bitqty uint, ricFlag []byte) ([]byte, string, error) {
        packedBuf := make([]byte, maxAsn1PackedBufferSize)
        errBuf := make([]C.char, maxAsn1CodecMessageBufferSize)
        packedBufSize := C.ulong(len(packedBuf))
@@ -68,7 +76,7 @@ func PreparePackedEndcX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMe
        return packedBuf[:packedBufSize], pduAsString, nil
 }
 
-func PreparePackedX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessageBufferSize int, pLMNId []byte, eNB_Id []byte /*18, 20, 21, 28 bits length*/, bitqty uint, ricFlag []byte) ([]byte, string, error) {
+func preparePackedX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessageBufferSize int, pLMNId []byte, eNB_Id []byte /*18, 20, 21, 28 bits length*/, bitqty uint, ricFlag []byte) ([]byte, string, error) {
        packedBuf := make([]byte, maxAsn1PackedBufferSize)
        errBuf := make([]C.char, maxAsn1CodecMessageBufferSize)
        packedBufSize := C.ulong(len(packedBuf))
@@ -94,3 +102,46 @@ func PreparePackedX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessag
        }
        return packedBuf[:packedBufSize], pduAsString, nil
 }
+
+//Expected value in RIC_ID = pLMN_Identity-eNB_ID/<eNB_ID size in bits>
+//<6 hex digits>-<6 or 8 hex digits>/<18|20|21|28>
+//Each byte is represented by two hex digits, the value in the lowest byte of the eNB_ID must be assigned to the lowest bits
+//For example, to get the value of ffffeab/28  the last byte must be 0x0b, not 0xb0 (-ffffea0b/28).
+func parseRicID(ricId string) error {
+       if _, err := fmt.Sscanf(ricId, "%6x-%8x/%2d", &pLMNId, &eNBId, &eNBIdBitqty); err != nil {
+               return fmt.Errorf("unable to extract the value of %s: %s", EnvRicId, err)
+       }
+
+       if len(pLMNId) < 3 {
+               return fmt.Errorf("invalid value for %s, len(pLMNId:%v) != 3", EnvRicId, pLMNId)
+       }
+
+       if len(eNBId) < 3 {
+               return fmt.Errorf("invalid value for %s, len(eNBId:%v) != 3 or 4", EnvRicId, eNBId)
+       }
+
+       if eNBIdBitqty != ShortMacro_eNB_ID && eNBIdBitqty != Macro_eNB_ID && eNBIdBitqty != LongMacro_eNB_ID && eNBIdBitqty != Home_eNB_ID {
+               return fmt.Errorf("invalid value for %s, eNBIdBitqty: %d", EnvRicId, eNBIdBitqty)
+       }
+
+       return nil
+}
+
+func init() {
+       var err error
+       ricId := os.Getenv(EnvRicId)
+       //ricId="bbbccc-ffff0e/20"
+       //ricId="bbbccc-abcd0e/20"
+       if err = parseRicID(ricId); err != nil {
+               panic(err)
+       }
+
+       PackedEndcX2setupRequest, PackedEndcX2setupRequestAsString, err = preparePackedEndcX2SetupRequest(MaxAsn1PackedBufferSize, MaxAsn1CodecMessageBufferSize, pLMNId, eNBId, eNBIdBitqty, ricFlag)
+       if err != nil {
+               panic(err)
+       }
+       PackedX2setupRequest, PackedX2setupRequestAsString, err = preparePackedX2SetupRequest(MaxAsn1PackedBufferSize, MaxAsn1CodecMessageBufferSize, pLMNId, eNBId, eNBIdBitqty, ricFlag)
+       if err != nil {
+               panic(err)
+       }
+}