1 files changed, 155 insertions, 0 deletions
diff --git a/src/go/plugin/go.d/modules/snmp/snmp.go b/src/go/plugin/go.d/modules/snmp/snmp.go
new file mode 100644
index 000000000..253d9f50d
--- /dev/null
+++ b/src/go/plugin/go.d/modules/snmp/snmp.go
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package snmp
+
+import (
+	_ "embed"
+	"errors"
+
+	"github.com/netdata/netdata/go/plugins/plugin/go.d/agent/module"
+	"github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/matcher"
+
+	"github.com/gosnmp/gosnmp"
+)
+
+//go:embed "config_schema.json"
+var configSchema string
+
+func init() {
+	module.Register("snmp", module.Creator{
+		JobConfigSchema: configSchema,
+		Defaults: module.Defaults{
+			UpdateEvery: 10,
+		},
+		Create: func() module.Module { return New() },
+		Config: func() any { return &Config{} },
+	})
+}
+
+func New() *SNMP {
+	return &SNMP{
+		Config: Config{
+			Community: "public",
+			Options: Options{
+				Port:           161,
+				Retries:        1,
+				Timeout:        5,
+				Version:        gosnmp.Version2c.String(),
+				MaxOIDs:        60,
+				MaxRepetitions: 25,
+			},
+			User: User{
+				SecurityLevel: "authPriv",
+				AuthProto:     "sha512",
+				PrivProto:     "aes192c",
+			},
+		},
+
+		newSnmpClient: gosnmp.NewHandler,
+
+		checkMaxReps:  true,
+		collectIfMib:  true,
+		netInterfaces: make(map[string]*netInterface),
+	}
+}
+
+type SNMP struct {
+	module.Base
+	Config `yaml:",inline" json:""`
+
+	charts *module.Charts
+
+	newSnmpClient func() gosnmp.Handler
+	snmpClient    gosnmp.Handler
+
+	netIfaceFilterByName matcher.Matcher
+	netIfaceFilterByType matcher.Matcher
+
+	checkMaxReps  bool
+	collectIfMib  bool
+	netInterfaces map[string]*netInterface
+	sysName       string
+
+	oids []string
+}
+
+func (s *SNMP) Configuration() any {
+	return s.Config
+}
+
+func (s *SNMP) Init() error {
+	err := s.validateConfig()
+	if err != nil {
+		s.Errorf("config validation failed: %v", err)
+		return err
+	}
+
+	snmpClient, err := s.initSNMPClient()
+	if err != nil {
+		s.Errorf("failed to initialize SNMP client: %v", err)
+		return err
+	}
+
+	err = snmpClient.Connect()
+	if err != nil {
+		s.Errorf("SNMP client connection failed: %v", err)
+		return err
+	}
+	s.snmpClient = snmpClient
+
+	byName, byType, err := s.initNetIfaceFilters()
+	if err != nil {
+		s.Errorf("failed to initialize network interface filters: %v", err)
+		return err
+	}
+	s.netIfaceFilterByName = byName
+	s.netIfaceFilterByType = byType
+
+	charts, err := newUserInputCharts(s.ChartsInput)
+	if err != nil {
+		s.Errorf("failed to create user charts: %v", err)
+		return err
+	}
+	s.charts = charts
+
+	s.oids = s.initOIDs()
+
+	return nil
+}
+
+func (s *SNMP) Check() error {
+	mx, err := s.collect()
+	if err != nil {
+		s.Error(err)
+		return err
+	}
+
+	if len(mx) == 0 {
+		return errors.New("no metrics collected")
+	}
+
+	return nil
+}
+
+func (s *SNMP) Charts() *module.Charts {
+	return s.charts
+}
+
+func (s *SNMP) Collect() map[string]int64 {
+	mx, err := s.collect()
+	if err != nil {
+		s.Error(err)
+	}
+
+	if len(mx) == 0 {
+		return nil
+	}
+
+	return mx
+}
+
+func (s *SNMP) Cleanup() {
+	if s.snmpClient != nil {
+		_ = s.snmpClient.Close()
+	}
+}