70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
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package snmp
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import (
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"fmt"
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omd "git.loafle.net/overflow/model/discovery"
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"github.com/k-sone/snmpgo"
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)
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var defaultPort = 161
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var defaultOIDs = []string{
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"1.3.6.1.2.1.1.5.0", //sysName
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}
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type SNMPResponse struct {
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Host *omd.Host
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Value map[string]string
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Error error
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}
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func ScanSNMP(host *omd.Host, community string, ch chan *SNMPResponse) {
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go func() {
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getV2(host, defaultPort, community, defaultOIDs, ch)
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}()
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}
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func getV2(host *omd.Host, port int, community string, _oids []string, ch chan *SNMPResponse) {
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address := fmt.Sprintf("%s:%d", host.Address, port)
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snmp, err := snmpgo.NewSNMP(snmpgo.SNMPArguments{
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Version: snmpgo.V2c,
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Address: address,
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Retries: 1,
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Community: community,
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})
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if err != nil {
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ch <- &SNMPResponse{host, nil, err}
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return
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}
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defer snmp.Close()
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oids, err := snmpgo.NewOids(_oids)
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if err != nil {
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ch <- &SNMPResponse{host, nil, err}
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return
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}
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pdu, err := snmp.GetRequest(oids)
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if err != nil {
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ch <- &SNMPResponse{host, nil, err}
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return
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}
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if pdu.ErrorStatus() != snmpgo.NoError {
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ch <- &SNMPResponse{host, nil, fmt.Errorf("%s", pdu.ErrorStatus().String())}
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return
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}
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if pdu == nil {
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ch <- &SNMPResponse{host, nil, fmt.Errorf("%s", "Empty PDU")}
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return
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}
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resMap := make(map[string]string)
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for _, val := range pdu.VarBinds() {
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resMap[val.Oid.String()] = val.Variable.String()
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}
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ch <- &SNMPResponse{host, resMap, nil}
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return
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}
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