Alternate SNMP plugin (#1389)
* Add a new and improved snmp plugin * update gosnmp for duplicate packet fix https://github.com/soniah/gosnmp/issues/68 https://github.com/soniah/gosnmp/pull/69
This commit is contained in:
Patrick Hemmer
committed by
Cameron Sparr
Cameron Sparr
parent
b022b5567d
commit
7fac74919c
791
plugins/inputs/snmp/snmp.go
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791
plugins/inputs/snmp/snmp.go
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@@ -0,0 +1,791 @@
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package snmp
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import (
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"bytes"
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"fmt"
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"math"
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"net"
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"os/exec"
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"strconv"
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"strings"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/internal"
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"github.com/influxdata/telegraf/plugins/inputs"
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"github.com/soniah/gosnmp"
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)
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const description = `Retrieves SNMP values from remote agents`
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const sampleConfig = `
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agents = [ "127.0.0.1:161" ]
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timeout = "5s"
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version = 2
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# SNMPv1 & SNMPv2 parameters
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community = "public"
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# SNMPv2 & SNMPv3 parameters
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max_repetitions = 50
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# SNMPv3 parameters
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#sec_name = "myuser"
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#auth_protocol = "md5" # Values: "MD5", "SHA", ""
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#auth_password = "password123"
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#sec_level = "authNoPriv" # Values: "noAuthNoPriv", "authNoPriv", "authPriv"
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#context_name = ""
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#priv_protocol = "" # Values: "DES", "AES", ""
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#priv_password = ""
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# measurement name
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name = "system"
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[[inputs.snmp.field]]
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name = "hostname"
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oid = ".1.0.0.1.1"
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[[inputs.snmp.field]]
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name = "uptime"
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oid = ".1.0.0.1.2"
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[[inputs.snmp.field]]
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name = "load"
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oid = ".1.0.0.1.3"
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[[inputs.snmp.field]]
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oid = "HOST-RESOURCES-MIB::hrMemorySize"
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[[inputs.snmp.table]]
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# measurement name
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name = "remote_servers"
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inherit_tags = [ "hostname" ]
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[[inputs.snmp.table.field]]
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name = "server"
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oid = ".1.0.0.0.1.0"
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is_tag = true
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[[inputs.snmp.table.field]]
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name = "connections"
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oid = ".1.0.0.0.1.1"
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[[inputs.snmp.table.field]]
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name = "latency"
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oid = ".1.0.0.0.1.2"
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[[inputs.snmp.table]]
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# auto populate table's fields using the MIB
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oid = "HOST-RESOURCES-MIB::hrNetworkTable"
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`
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// execCommand is so tests can mock out exec.Command usage.
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var execCommand = exec.Command
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// execCmd executes the specified command, returning the STDOUT content.
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// If command exits with error status, the output is captured into the returned error.
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func execCmd(arg0 string, args ...string) ([]byte, error) {
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out, err := execCommand(arg0, args...).Output()
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if err != nil {
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if err, ok := err.(*exec.ExitError); ok {
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return nil, NestedError{
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Err: err,
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NestedErr: fmt.Errorf("%s", bytes.TrimRight(err.Stderr, "\n")),
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}
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}
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return nil, err
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}
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return out, nil
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}
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// Snmp holds the configuration for the plugin.
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type Snmp struct {
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// The SNMP agent to query. Format is ADDR[:PORT] (e.g. 1.2.3.4:161).
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Agents []string
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// Timeout to wait for a response.
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Timeout internal.Duration
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Retries int
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// Values: 1, 2, 3
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Version uint8
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// Parameters for Version 1 & 2
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Community string
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// Parameters for Version 2 & 3
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MaxRepetitions uint
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// Parameters for Version 3
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ContextName string
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// Values: "noAuthNoPriv", "authNoPriv", "authPriv"
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SecLevel string
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SecName string
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// Values: "MD5", "SHA", "". Default: ""
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AuthProtocol string
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AuthPassword string
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// Values: "DES", "AES", "". Default: ""
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PrivProtocol string
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PrivPassword string
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EngineID string
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EngineBoots uint32
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EngineTime uint32
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Tables []Table `toml:"table"`
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// Name & Fields are the elements of a Table.
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// Telegraf chokes if we try to embed a Table. So instead we have to embed the
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// fields of a Table, and construct a Table during runtime.
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Name string
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Fields []Field `toml:"field"`
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connectionCache map[string]snmpConnection
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initialized bool
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}
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func (s *Snmp) init() error {
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if s.initialized {
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return nil
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}
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for i := range s.Tables {
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if err := s.Tables[i].init(); err != nil {
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return err
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}
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}
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for i := range s.Fields {
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if err := s.Fields[i].init(); err != nil {
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return err
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}
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}
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s.initialized = true
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return nil
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}
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// Table holds the configuration for a SNMP table.
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type Table struct {
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// Name will be the name of the measurement.
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Name string
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// Which tags to inherit from the top-level config.
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InheritTags []string
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// Fields is the tags and values to look up.
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Fields []Field `toml:"field"`
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// OID for automatic field population.
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// If provided, init() will populate Fields with all the table columns of the
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// given OID.
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Oid string
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initialized bool
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}
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// init() populates Fields if a table OID is provided.
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func (t *Table) init() error {
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if t.initialized {
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return nil
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}
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if t.Oid == "" {
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t.initialized = true
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return nil
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}
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mibPrefix := ""
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if err := snmpTranslate(&mibPrefix, &t.Oid, &t.Name); err != nil {
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return err
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}
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// first attempt to get the table's tags
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tagOids := map[string]struct{}{}
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// We have to guess that the "entry" oid is `t.Oid+".1"`. snmptable and snmptranslate don't seem to have a way to provide the info.
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if out, err := execCmd("snmptranslate", "-m", "all", "-Td", t.Oid+".1"); err == nil {
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lines := bytes.Split(out, []byte{'\n'})
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// get the MIB name if we didn't get it above
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if mibPrefix == "" {
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if i := bytes.Index(lines[0], []byte("::")); i != -1 {
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mibPrefix = string(lines[0][:i+2])
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}
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}
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for _, line := range lines {
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if !bytes.HasPrefix(line, []byte(" INDEX")) {
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continue
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}
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i := bytes.Index(line, []byte("{ "))
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if i == -1 { // parse error
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continue
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}
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line = line[i+2:]
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i = bytes.Index(line, []byte(" }"))
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if i == -1 { // parse error
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continue
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}
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line = line[:i]
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for _, col := range bytes.Split(line, []byte(", ")) {
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tagOids[mibPrefix+string(col)] = struct{}{}
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}
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}
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}
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// this won't actually try to run a query. The `-Ch` will just cause it to dump headers.
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out, err := execCmd("snmptable", "-m", "all", "-Ch", "-Cl", "-c", "public", "127.0.0.1", t.Oid)
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if err != nil {
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return Errorf(err, "getting table columns for %s", t.Oid)
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}
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cols := bytes.SplitN(out, []byte{'\n'}, 2)[0]
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if len(cols) == 0 {
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return fmt.Errorf("unable to get columns for table %s", t.Oid)
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}
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for _, col := range bytes.Split(cols, []byte{' '}) {
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if len(col) == 0 {
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continue
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}
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col := string(col)
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_, isTag := tagOids[mibPrefix+col]
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t.Fields = append(t.Fields, Field{Name: col, Oid: mibPrefix + col, IsTag: isTag})
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}
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// initialize all the nested fields
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for i := range t.Fields {
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if err := t.Fields[i].init(); err != nil {
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return err
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}
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}
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t.initialized = true
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return nil
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}
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// Field holds the configuration for a Field to look up.
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type Field struct {
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// Name will be the name of the field.
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Name string
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// OID is prefix for this field. The plugin will perform a walk through all
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// OIDs with this as their parent. For each value found, the plugin will strip
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// off the OID prefix, and use the remainder as the index. For multiple fields
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// to show up in the same row, they must share the same index.
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Oid string
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// IsTag controls whether this OID is output as a tag or a value.
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IsTag bool
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// Conversion controls any type conversion that is done on the value.
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// "float"/"float(0)" will convert the value into a float.
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// "float(X)" will convert the value into a float, and then move the decimal before Xth right-most digit.
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// "int" will conver the value into an integer.
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Conversion string
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initialized bool
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}
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// init() converts OID names to numbers, and sets the .Name attribute if unset.
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func (f *Field) init() error {
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if f.initialized {
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return nil
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}
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if err := snmpTranslate(nil, &f.Oid, &f.Name); err != nil {
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return err
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}
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//TODO use textual convention conversion from the MIB
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f.initialized = true
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return nil
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}
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// RTable is the resulting table built from a Table.
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type RTable struct {
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// Name is the name of the field, copied from Table.Name.
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Name string
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// Time is the time the table was built.
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Time time.Time
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// Rows are the rows that were found, one row for each table OID index found.
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Rows []RTableRow
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}
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// RTableRow is the resulting row containing all the OID values which shared
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// the same index.
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type RTableRow struct {
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// Tags are all the Field values which had IsTag=true.
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Tags map[string]string
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// Fields are all the Field values which had IsTag=false.
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Fields map[string]interface{}
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}
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// NestedError wraps an error returned from deeper in the code.
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type NestedError struct {
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// Err is the error from where the NestedError was constructed.
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Err error
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// NestedError is the error that was passed back from the called function.
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NestedErr error
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}
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// Error returns a concatenated string of all the nested errors.
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func (ne NestedError) Error() string {
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return ne.Err.Error() + ": " + ne.NestedErr.Error()
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}
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// Errorf is a convenience function for constructing a NestedError.
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func Errorf(err error, msg string, format ...interface{}) error {
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return NestedError{
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NestedErr: err,
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Err: fmt.Errorf(msg, format...),
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}
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}
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func init() {
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inputs.Add("snmp", func() telegraf.Input {
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return &Snmp{
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Retries: 5,
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MaxRepetitions: 50,
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Timeout: internal.Duration{Duration: 5 * time.Second},
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Version: 2,
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Community: "public",
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}
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})
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}
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// SampleConfig returns the default configuration of the input.
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func (s *Snmp) SampleConfig() string {
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return sampleConfig
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}
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// Description returns a one-sentence description on the input.
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func (s *Snmp) Description() string {
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return description
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}
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// Gather retrieves all the configured fields and tables.
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// Any error encountered does not halt the process. The errors are accumulated
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// and returned at the end.
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func (s *Snmp) Gather(acc telegraf.Accumulator) error {
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if err := s.init(); err != nil {
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return err
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}
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for _, agent := range s.Agents {
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gs, err := s.getConnection(agent)
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if err != nil {
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acc.AddError(Errorf(err, "agent %s", agent))
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continue
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}
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// First is the top-level fields. We treat the fields as table prefixes with an empty index.
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t := Table{
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Name: s.Name,
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Fields: s.Fields,
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}
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topTags := map[string]string{}
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if err := s.gatherTable(acc, gs, t, topTags, false); err != nil {
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acc.AddError(Errorf(err, "agent %s", agent))
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}
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// Now is the real tables.
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for _, t := range s.Tables {
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if err := s.gatherTable(acc, gs, t, topTags, true); err != nil {
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acc.AddError(Errorf(err, "agent %s", agent))
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}
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}
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}
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return nil
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}
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func (s *Snmp) gatherTable(acc telegraf.Accumulator, gs snmpConnection, t Table, topTags map[string]string, walk bool) error {
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rt, err := t.Build(gs, walk)
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if err != nil {
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return err
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}
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for _, tr := range rt.Rows {
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if !walk {
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// top-level table. Add tags to topTags.
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for k, v := range tr.Tags {
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topTags[k] = v
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}
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} else {
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// real table. Inherit any specified tags.
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for _, k := range t.InheritTags {
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if v, ok := topTags[k]; ok {
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tr.Tags[k] = v
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}
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}
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}
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if _, ok := tr.Tags["agent_host"]; !ok {
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tr.Tags["agent_host"] = gs.Host()
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}
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acc.AddFields(rt.Name, tr.Fields, tr.Tags, rt.Time)
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}
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return nil
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}
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// Build retrieves all the fields specified in the table and constructs the RTable.
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func (t Table) Build(gs snmpConnection, walk bool) (*RTable, error) {
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rows := map[string]RTableRow{}
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tagCount := 0
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for _, f := range t.Fields {
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if f.IsTag {
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tagCount++
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}
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if len(f.Oid) == 0 {
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return nil, fmt.Errorf("cannot have empty OID")
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}
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var oid string
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if f.Oid[0] == '.' {
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oid = f.Oid
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} else {
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// make sure OID has "." because the BulkWalkAll results do, and the prefix needs to match
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oid = "." + f.Oid
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}
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// ifv contains a mapping of table OID index to field value
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ifv := map[string]interface{}{}
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if !walk {
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// This is used when fetching non-table fields. Fields configured a the top
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// scope of the plugin.
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// We fetch the fields directly, and add them to ifv as if the index were an
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// empty string. This results in all the non-table fields sharing the same
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// index, and being added on the same row.
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if pkt, err := gs.Get([]string{oid}); err != nil {
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return nil, Errorf(err, "performing get")
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} else if pkt != nil && len(pkt.Variables) > 0 && pkt.Variables[0].Type != gosnmp.NoSuchObject {
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ent := pkt.Variables[0]
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ifv[ent.Name[len(oid):]] = fieldConvert(f.Conversion, ent.Value)
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}
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} else {
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err := gs.Walk(oid, func(ent gosnmp.SnmpPDU) error {
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if len(ent.Name) <= len(oid) || ent.Name[:len(oid)+1] != oid+"." {
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return NestedError{} // break the walk
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}
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ifv[ent.Name[len(oid):]] = fieldConvert(f.Conversion, ent.Value)
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return nil
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})
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if err != nil {
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if _, ok := err.(NestedError); !ok {
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return nil, Errorf(err, "performing bulk walk")
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}
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}
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}
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for i, v := range ifv {
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rtr, ok := rows[i]
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if !ok {
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rtr = RTableRow{}
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rtr.Tags = map[string]string{}
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rtr.Fields = map[string]interface{}{}
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rows[i] = rtr
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}
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if f.IsTag {
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if vs, ok := v.(string); ok {
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rtr.Tags[f.Name] = vs
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} else {
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rtr.Tags[f.Name] = fmt.Sprintf("%v", v)
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}
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} else {
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rtr.Fields[f.Name] = v
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}
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}
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}
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rt := RTable{
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Name: t.Name,
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Time: time.Now(), //TODO record time at start
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Rows: make([]RTableRow, 0, len(rows)),
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}
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for _, r := range rows {
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if len(r.Tags) < tagCount {
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// don't add rows which are missing tags, as without tags you can't filter
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continue
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}
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rt.Rows = append(rt.Rows, r)
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}
|
||||
return &rt, nil
|
||||
}
|
||||
|
||||
// snmpConnection is an interface which wraps a *gosnmp.GoSNMP object.
|
||||
// We interact through an interface so we can mock it out in tests.
|
||||
type snmpConnection interface {
|
||||
Host() string
|
||||
//BulkWalkAll(string) ([]gosnmp.SnmpPDU, error)
|
||||
Walk(string, gosnmp.WalkFunc) error
|
||||
Get(oids []string) (*gosnmp.SnmpPacket, error)
|
||||
}
|
||||
|
||||
// gosnmpWrapper wraps a *gosnmp.GoSNMP object so we can use it as a snmpConnection.
|
||||
type gosnmpWrapper struct {
|
||||
*gosnmp.GoSNMP
|
||||
}
|
||||
|
||||
// Host returns the value of GoSNMP.Target.
|
||||
func (gsw gosnmpWrapper) Host() string {
|
||||
return gsw.Target
|
||||
}
|
||||
|
||||
// Walk wraps GoSNMP.Walk() or GoSNMP.BulkWalk(), depending on whether the
|
||||
// connection is using SNMPv1 or newer.
|
||||
// Also, if any error is encountered, it will just once reconnect and try again.
|
||||
func (gsw gosnmpWrapper) Walk(oid string, fn gosnmp.WalkFunc) error {
|
||||
var err error
|
||||
// On error, retry once.
|
||||
// Unfortunately we can't distinguish between an error returned by gosnmp, and one returned by the walk function.
|
||||
for i := 0; i < 2; i++ {
|
||||
if gsw.Version == gosnmp.Version1 {
|
||||
err = gsw.GoSNMP.Walk(oid, fn)
|
||||
} else {
|
||||
err = gsw.GoSNMP.BulkWalk(oid, fn)
|
||||
}
|
||||
if err == nil {
|
||||
return nil
|
||||
}
|
||||
if err := gsw.GoSNMP.Connect(); err != nil {
|
||||
return Errorf(err, "reconnecting")
|
||||
}
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
// Get wraps GoSNMP.GET().
|
||||
// If any error is encountered, it will just once reconnect and try again.
|
||||
func (gsw gosnmpWrapper) Get(oids []string) (*gosnmp.SnmpPacket, error) {
|
||||
var err error
|
||||
var pkt *gosnmp.SnmpPacket
|
||||
for i := 0; i < 2; i++ {
|
||||
pkt, err = gsw.GoSNMP.Get(oids)
|
||||
if err == nil {
|
||||
return pkt, nil
|
||||
}
|
||||
if err := gsw.GoSNMP.Connect(); err != nil {
|
||||
return nil, Errorf(err, "reconnecting")
|
||||
}
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// getConnection creates a snmpConnection (*gosnmp.GoSNMP) object and caches the
|
||||
// result using `agent` as the cache key.
|
||||
func (s *Snmp) getConnection(agent string) (snmpConnection, error) {
|
||||
if s.connectionCache == nil {
|
||||
s.connectionCache = map[string]snmpConnection{}
|
||||
}
|
||||
if gs, ok := s.connectionCache[agent]; ok {
|
||||
return gs, nil
|
||||
}
|
||||
|
||||
gs := gosnmpWrapper{&gosnmp.GoSNMP{}}
|
||||
|
||||
host, portStr, err := net.SplitHostPort(agent)
|
||||
if err != nil {
|
||||
if err, ok := err.(*net.AddrError); !ok || err.Err != "missing port in address" {
|
||||
return nil, Errorf(err, "parsing host")
|
||||
}
|
||||
host = agent
|
||||
portStr = "161"
|
||||
}
|
||||
gs.Target = host
|
||||
|
||||
port, err := strconv.ParseUint(portStr, 10, 16)
|
||||
if err != nil {
|
||||
return nil, Errorf(err, "parsing port")
|
||||
}
|
||||
gs.Port = uint16(port)
|
||||
|
||||
gs.Timeout = s.Timeout.Duration
|
||||
|
||||
gs.Retries = s.Retries
|
||||
|
||||
switch s.Version {
|
||||
case 3:
|
||||
gs.Version = gosnmp.Version3
|
||||
case 2, 0:
|
||||
gs.Version = gosnmp.Version2c
|
||||
case 1:
|
||||
gs.Version = gosnmp.Version1
|
||||
default:
|
||||
return nil, fmt.Errorf("invalid version")
|
||||
}
|
||||
|
||||
if s.Version < 3 {
|
||||
if s.Community == "" {
|
||||
gs.Community = "public"
|
||||
} else {
|
||||
gs.Community = s.Community
|
||||
}
|
||||
}
|
||||
|
||||
gs.MaxRepetitions = int(s.MaxRepetitions)
|
||||
|
||||
if s.Version == 3 {
|
||||
gs.ContextName = s.ContextName
|
||||
|
||||
sp := &gosnmp.UsmSecurityParameters{}
|
||||
gs.SecurityParameters = sp
|
||||
gs.SecurityModel = gosnmp.UserSecurityModel
|
||||
|
||||
switch strings.ToLower(s.SecLevel) {
|
||||
case "noauthnopriv", "":
|
||||
gs.MsgFlags = gosnmp.NoAuthNoPriv
|
||||
case "authnopriv":
|
||||
gs.MsgFlags = gosnmp.AuthNoPriv
|
||||
case "authpriv":
|
||||
gs.MsgFlags = gosnmp.AuthPriv
|
||||
default:
|
||||
return nil, fmt.Errorf("invalid secLevel")
|
||||
}
|
||||
|
||||
sp.UserName = s.SecName
|
||||
|
||||
switch strings.ToLower(s.AuthProtocol) {
|
||||
case "md5":
|
||||
sp.AuthenticationProtocol = gosnmp.MD5
|
||||
case "sha":
|
||||
sp.AuthenticationProtocol = gosnmp.SHA
|
||||
case "":
|
||||
sp.AuthenticationProtocol = gosnmp.NoAuth
|
||||
default:
|
||||
return nil, fmt.Errorf("invalid authProtocol")
|
||||
}
|
||||
|
||||
sp.AuthenticationPassphrase = s.AuthPassword
|
||||
|
||||
switch strings.ToLower(s.PrivProtocol) {
|
||||
case "des":
|
||||
sp.PrivacyProtocol = gosnmp.DES
|
||||
case "aes":
|
||||
sp.PrivacyProtocol = gosnmp.AES
|
||||
case "":
|
||||
sp.PrivacyProtocol = gosnmp.NoPriv
|
||||
default:
|
||||
return nil, fmt.Errorf("invalid privProtocol")
|
||||
}
|
||||
|
||||
sp.PrivacyPassphrase = s.PrivPassword
|
||||
|
||||
sp.AuthoritativeEngineID = s.EngineID
|
||||
|
||||
sp.AuthoritativeEngineBoots = s.EngineBoots
|
||||
|
||||
sp.AuthoritativeEngineTime = s.EngineTime
|
||||
}
|
||||
|
||||
if err := gs.Connect(); err != nil {
|
||||
return nil, Errorf(err, "setting up connection")
|
||||
}
|
||||
|
||||
s.connectionCache[agent] = gs
|
||||
return gs, nil
|
||||
}
|
||||
|
||||
// fieldConvert converts from any type according to the conv specification
|
||||
// "float"/"float(0)" will convert the value into a float.
|
||||
// "float(X)" will convert the value into a float, and then move the decimal before Xth right-most digit.
|
||||
// "int" will convert the value into an integer.
|
||||
// "" will convert a byte slice into a string.
|
||||
// Any other conv will return the input value unchanged.
|
||||
func fieldConvert(conv string, v interface{}) interface{} {
|
||||
if conv == "" {
|
||||
if bs, ok := v.([]byte); ok {
|
||||
return string(bs)
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
var d int
|
||||
if _, err := fmt.Sscanf(conv, "float(%d)", &d); err == nil || conv == "float" {
|
||||
switch vt := v.(type) {
|
||||
case float32:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case float64:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case int:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case int8:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case int16:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case int32:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case int64:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case uint:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case uint8:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case uint16:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case uint32:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case uint64:
|
||||
v = float64(vt) / math.Pow10(d)
|
||||
case []byte:
|
||||
vf, _ := strconv.ParseFloat(string(vt), 64)
|
||||
v = vf / math.Pow10(d)
|
||||
case string:
|
||||
vf, _ := strconv.ParseFloat(vt, 64)
|
||||
v = vf / math.Pow10(d)
|
||||
}
|
||||
}
|
||||
if conv == "int" {
|
||||
switch vt := v.(type) {
|
||||
case float32:
|
||||
v = int64(vt)
|
||||
case float64:
|
||||
v = int64(vt)
|
||||
case int:
|
||||
v = int64(vt)
|
||||
case int8:
|
||||
v = int64(vt)
|
||||
case int16:
|
||||
v = int64(vt)
|
||||
case int32:
|
||||
v = int64(vt)
|
||||
case int64:
|
||||
v = int64(vt)
|
||||
case uint:
|
||||
v = int64(vt)
|
||||
case uint8:
|
||||
v = int64(vt)
|
||||
case uint16:
|
||||
v = int64(vt)
|
||||
case uint32:
|
||||
v = int64(vt)
|
||||
case uint64:
|
||||
v = int64(vt)
|
||||
case []byte:
|
||||
v, _ = strconv.Atoi(string(vt))
|
||||
case string:
|
||||
v, _ = strconv.Atoi(vt)
|
||||
}
|
||||
}
|
||||
|
||||
return v
|
||||
}
|
||||
|
||||
// snmpTranslate resolves the given OID.
|
||||
// The contents of the oid parameter will be replaced with the numeric oid value.
|
||||
// If name is empty, the textual OID value is stored in it. If the textual OID cannot be translated, the numeric OID is stored instead.
|
||||
// If mibPrefix is non-nil, the MIB in which the OID was found is stored, with a suffix of "::".
|
||||
func snmpTranslate(mibPrefix *string, oid *string, name *string) error {
|
||||
if strings.ContainsAny(*oid, ":abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ") {
|
||||
out, err := execCmd("snmptranslate", "-m", "all", "-On", *oid)
|
||||
if err != nil {
|
||||
return Errorf(err, "translating %s", *oid)
|
||||
}
|
||||
*oid = string(bytes.TrimSuffix(out, []byte{'\n'}))
|
||||
}
|
||||
|
||||
if *name == "" {
|
||||
out, err := execCmd("snmptranslate", "-m", "all", *oid)
|
||||
if err != nil {
|
||||
//TODO debug message
|
||||
*name = *oid
|
||||
} else {
|
||||
if i := bytes.Index(out, []byte("::")); i != -1 {
|
||||
if mibPrefix != nil {
|
||||
*mibPrefix = string(out[:i+2])
|
||||
}
|
||||
out = out[i+2:]
|
||||
}
|
||||
*name = string(bytes.TrimSuffix(out, []byte{'\n'}))
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
Reference in New Issue
Block a user