| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package snmputils |
| 4 | |
| 5 | import ( |
| 6 | "fmt" |
| 7 | "strings" |
| 8 | |
| 9 | "github.com/gosnmp/gosnmp" |
| 10 | ) |
| 11 | |
| 12 | func ParseSNMPVersion(version string) gosnmp.SnmpVersion { |
| 13 | switch version { |
| 14 | case "0", "1": |
| 15 | return gosnmp.Version1 |
| 16 | case "2", "2c", "": |
| 17 | return gosnmp.Version2c |
| 18 | case "3": |
| 19 | return gosnmp.Version3 |
| 20 | default: |
| 21 | return gosnmp.Version2c |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | func ParseSNMPv3SecurityLevel(level string) gosnmp.SnmpV3MsgFlags { |
| 26 | switch level { |
| 27 | case "1", "none", "noAuthNoPriv", "": |
| 28 | return gosnmp.NoAuthNoPriv |
| 29 | case "2", "authNoPriv": |
| 30 | return gosnmp.AuthNoPriv |
| 31 | case "3", "authPriv": |
| 32 | return gosnmp.AuthPriv |
| 33 | default: |
| 34 | return gosnmp.NoAuthNoPriv |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | func ParseSNMPv3AuthProtocol(protocol string) gosnmp.SnmpV3AuthProtocol { |
| 39 | switch protocol { |
| 40 | case "1", "none", "noAuth", "": |
| 41 | return gosnmp.NoAuth |
| 42 | case "2", "md5": |
| 43 | return gosnmp.MD5 |
| 44 | case "3", "sha": |
| 45 | return gosnmp.SHA |
| 46 | case "4", "sha224": |
| 47 | return gosnmp.SHA224 |
| 48 | case "5", "sha256": |
| 49 | return gosnmp.SHA256 |
| 50 | case "6", "sha384": |
| 51 | return gosnmp.SHA384 |
| 52 | case "7", "sha512": |
| 53 | return gosnmp.SHA512 |
| 54 | default: |
| 55 | return gosnmp.NoAuth |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | func ParseSNMPv3PrivProtocol(protocol string) gosnmp.SnmpV3PrivProtocol { |
| 60 | switch protocol { |
| 61 | case "1", "none", "noPriv", "": |
| 62 | return gosnmp.NoPriv |
| 63 | case "2", "des": |
| 64 | return gosnmp.DES |
| 65 | case "3", "aes": |
| 66 | return gosnmp.AES |
| 67 | case "4", "aes192": |
| 68 | return gosnmp.AES192 |
| 69 | case "5", "aes256": |
| 70 | return gosnmp.AES256 |
| 71 | case "6", "aes192c": |
| 72 | return gosnmp.AES192C |
| 73 | case "7", "aes256c": |
| 74 | return gosnmp.AES256C |
| 75 | default: |
| 76 | return gosnmp.NoPriv |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | func SnmpClientConnInfo(c gosnmp.Handler) string { |
| 81 | var info strings.Builder |
| 82 | info.WriteString(fmt.Sprintf("hostname='%s',port='%d',snmp_version='%s'", c.Target(), c.Port(), c.Version())) |
| 83 | switch c.Version() { |
| 84 | case gosnmp.Version1, gosnmp.Version2c: |
| 85 | info.WriteString(fmt.Sprintf(",community='%s'", c.Community())) |
| 86 | case gosnmp.Version3: |
| 87 | info.WriteString(fmt.Sprintf(",security_level='%d,%s'", c.MsgFlags(), c.SecurityParameters().Description())) |
| 88 | if ctx := c.ContextName(); ctx != "" { |
| 89 | info.WriteString(fmt.Sprintf(",context_name='%s'", ctx)) |
| 90 | } |
| 91 | } |
| 92 | return info.String() |
| 93 | } |