fix(inputs.s7comm): Fix bit queries (#14068)

go.mod

@@ -160,7 +160,7 @@ require (
 	github.com/redis/go-redis/v9 v9.2.1
 	github.com/riemann/riemann-go-client v0.5.1-0.20211206220514-f58f10cdce16
 	github.com/robbiet480/go.nut v0.0.0-20220219091450-bd8f121e1fa1
-	github.com/robinson/gos7 v0.0.0-20231012111941-bdaa10e92e16
+	github.com/robinson/gos7 v0.0.0-20231031082500-fb5a72fd499e
 	github.com/safchain/ethtool v0.3.0
 	github.com/santhosh-tekuri/jsonschema/v5 v5.3.1
 	github.com/sensu/sensu-go/api/core/v2 v2.16.0

go.sum

@@ -2039,8 +2039,8 @@ github.com/robertkrimen/otto v0.0.0-20191219234010-c382bd3c16ff h1:+6NUiITWwE5q1
 github.com/robertkrimen/otto v0.0.0-20191219234010-c382bd3c16ff/go.mod h1:xvqspoSXJTIpemEonrMDFq6XzwHYYgToXWj5eRX1OtY=
 github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
 github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
-github.com/robinson/gos7 v0.0.0-20231012111941-bdaa10e92e16 h1:bhgGFmhTZpESybQyk+uxZ+dAd3yNSJSano2fN7HGmlA=
+github.com/robinson/gos7 v0.0.0-20231031082500-fb5a72fd499e h1:Ofp6C2iX58K698sGpIXZFp3furntNlhIjeyLkcrAiek=
-github.com/robinson/gos7 v0.0.0-20231012111941-bdaa10e92e16/go.mod h1:AMHIeh1KJ7Xa2RVOMHdv9jXKrpw0D4EWGGQMHLb2doc=
+github.com/robinson/gos7 v0.0.0-20231031082500-fb5a72fd499e/go.mod h1:AMHIeh1KJ7Xa2RVOMHdv9jXKrpw0D4EWGGQMHLb2doc=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/rogpeppe/fastuuid v1.1.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/fastuuid v1.2.0 h1:Ppwyp6VYCF1nvBTXL3trRso7mXMlRrw9ooo375wvi2s=

plugins/inputs/s7comm/s7comm.go

@@ -301,9 +301,9 @@ func handleFieldAddress(address string) (*gos7.S7DataItem, converterFunc, error)
 	}
 
 	// Check the amount parameter if any
-	var extra int
+	var extra, bit int
 	switch dtype {
-	case "X", "S":
+	case "S":
 		// We require an extra parameter
 		x := groups["extra"]
 		if x == "" {
@@ -317,6 +317,21 @@ func handleFieldAddress(address string) (*gos7.S7DataItem, converterFunc, error)
 		if extra < 1 {
 			return nil, nil, fmt.Errorf("invalid extra parameter %d", extra)
 		}
+	case "X":
+		// We require an extra parameter
+		x := groups["extra"]
+		if x == "" {
+			return nil, nil, errors.New("extra parameter required")
+		}
+
+		bit, err = strconv.Atoi(x)
+		if err != nil {
+			return nil, nil, fmt.Errorf("invalid extra parameter: %w", err)
+		}
+		if bit < 0 || bit > 7 {
+			// Ensure bit address is valid
+			return nil, nil, fmt.Errorf("invalid extra parameter: bit address %d out of range", bit)
+		}
 	default:
 		if groups["extra"] != "" {
 			return nil, nil, errors.New("extra parameter specified but not used")
@@ -348,6 +363,7 @@ func handleFieldAddress(address string) (*gos7.S7DataItem, converterFunc, error)
 	item := &gos7.S7DataItem{
 		Area:     area,
 		WordLen:  wordlen,
+		Bit:      bit,
 		DBNumber: areaidx,
 		Start:    start,
 		Amount:   amount,
@@ -355,7 +371,7 @@ func handleFieldAddress(address string) (*gos7.S7DataItem, converterFunc, error)
 	}
 
 	// Determine the type converter function
-	f := determineConversion(dtype, extra)
+	f := determineConversion(dtype)
 	return item, f, nil
 }
 

plugins/inputs/s7comm/s7comm_test.go

@@ -258,6 +258,7 @@ func TestFieldMappings(t *testing.T) {
 						{
 							Area:     0x84,
 							WordLen:  0x01,
+							Bit:      2,
 							DBNumber: 5,
 							Start:    3,
 							Amount:   1,

plugins/inputs/s7comm/type_conversions.go

@@ -9,11 +9,11 @@ import (
 
 var helper = &gos7.Helper{}
 
-func determineConversion(dtype string, extra int) converterFunc {
+func determineConversion(dtype string) converterFunc {
 	switch dtype {
 	case "X":
 		return func(buf []byte) interface{} {
-			return (buf[0] & (1 << extra)) != 0
+			return buf[0] != 0
 		}
 	case "B":
 		return func(buf []byte) interface{} {