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authorIlya Etingof <etingof@gmail.com>2017-08-03 23:52:48 +0200
committerIlya Etingof <etingof@gmail.com>2017-08-03 23:52:48 +0200
commit9c55a5293c3f19d1c5747c9d0c7be7a7d5bfe7a6 (patch)
tree8163b50af585544cc4c4ae8fbdee9fcd114dc2df /examples
parent04bc906d29a344f9e67e304c44b7e5311450358c (diff)
downloadpysnmp-git-9c55a5293c3f19d1c5747c9d0c7be7a7d5bfe7a6.tar.gz
fail gracefully when sha2 suite is not available
Diffstat (limited to 'examples')
-rw-r--r--examples/v3arch/asyncore/agent/cmdrsp/implementing-dynamic-snmp-table.py127
-rw-r--r--examples/v3arch/asyncore/agent/cmdrsp/implementing-static-snmp-table.py (renamed from examples/v3arch/asyncore/agent/cmdrsp/implementing-snmp-table.py)0
2 files changed, 127 insertions, 0 deletions
diff --git a/examples/v3arch/asyncore/agent/cmdrsp/implementing-dynamic-snmp-table.py b/examples/v3arch/asyncore/agent/cmdrsp/implementing-dynamic-snmp-table.py
new file mode 100644
index 00000000..f7015e51
--- /dev/null
+++ b/examples/v3arch/asyncore/agent/cmdrsp/implementing-dynamic-snmp-table.py
@@ -0,0 +1,127 @@
+"""
+Implementing conceptual table
++++++++++++++++++++++++++++++
+
+Listen and respond to SNMP GET/SET/GETNEXT/GETBULK queries with
+the following options:
+
+* SNMPv2c
+* with SNMP community "public"
+* define a simple SNMP Table within a newly created EXAMPLE-MIB
+* pre-populate SNMP Table with a single row of values
+* allow read access only to the subtree where example SNMP Table resides
+* over IPv4/UDP, listening at 127.0.0.1:161
+
+The following Net-SNMP commands will populate and walk a table:
+
+| $ snmpset -v2c -c public 127.0.0.1 1.3.6.6.1.5.2.97.98.99 s "my value"
+| $ snmpset -v2c -c public 127.0.0.1 1.3.6.6.1.5.4.97.98.99 i 4
+| $ snmpwalk -v2c -c public 127.0.0.1 1.3.6
+
+...while the following command will destroy the same row
+
+| $ snmpset -v2c -c public 127.0.0.1 1.3.6.6.1.5.4.97.98.99 i 6
+| $ snmpwalk -v2c -c public 127.0.0.1 1.3.6
+
+""" #
+from pysnmp.entity import engine, config
+from pysnmp.entity.rfc3413 import cmdrsp, context
+from pysnmp.carrier.asyncore.dgram import udp
+from pysnmp.proto.api import v2c
+
+# Create SNMP engine
+snmpEngine = engine.SnmpEngine()
+
+# Transport setup
+
+# UDP over IPv4
+config.addTransport(
+ snmpEngine,
+ udp.domainName,
+ udp.UdpTransport().openServerMode(('127.0.0.1', 161))
+)
+
+# SNMPv2c setup
+
+# SecurityName <-> CommunityName mapping.
+config.addV1System(snmpEngine, 'my-area', 'public')
+
+# Allow read MIB access for this user / securityModels at VACM
+config.addVacmUser(snmpEngine, 2, 'my-area', 'noAuthNoPriv', (1, 3, 6, 6), (1, 3, 6, 6))
+
+# Create an SNMP context
+snmpContext = context.SnmpContext(snmpEngine)
+
+# --- define custom SNMP Table within a newly defined EXAMPLE-MIB ---
+
+mibBuilder = snmpContext.getMibInstrum().getMibBuilder()
+
+(MibTable,
+ MibTableRow,
+ MibTableColumn,
+ MibScalarInstance) = mibBuilder.importSymbols(
+ 'SNMPv2-SMI',
+ 'MibTable',
+ 'MibTableRow',
+ 'MibTableColumn',
+ 'MibScalarInstance'
+)
+
+RowStatus, = mibBuilder.importSymbols('SNMPv2-TC', 'RowStatus')
+
+mibBuilder.exportSymbols(
+ '__EXAMPLE-MIB',
+ # table object
+ exampleTable=MibTable((1, 3, 6, 6, 1)).setMaxAccess('readcreate'),
+ # table row object, also carries references to table indices
+ exampleTableEntry=MibTableRow((1, 3, 6, 6, 1, 5)).setMaxAccess('readcreate').setIndexNames(
+ (0, '__EXAMPLE-MIB', 'exampleTableColumn1')),
+ # table column: string index
+ exampleTableColumn1=MibTableColumn((1, 3, 6, 6, 1, 5, 1), v2c.OctetString()).setMaxAccess('readcreate'),
+ # table column: string value
+ exampleTableColumn2=MibTableColumn((1, 3, 6, 6, 1, 5, 2), v2c.OctetString()).setMaxAccess('readcreate'),
+ # table column: integer value with default
+ exampleTableColumn3=MibTableColumn((1, 3, 6, 6, 1, 5, 3), v2c.Integer32(123)).setMaxAccess('readcreate'),
+ # table column: row status
+ exampleTableStatus=MibTableColumn((1, 3, 6, 6, 1, 5, 4), RowStatus('notExists')).setMaxAccess('readcreate')
+)
+
+# --- end of custom SNMP table definition, empty table now exists ---
+
+# --- populate custom SNMP table with one row ---
+
+(exampleTableEntry,
+ exampleTableColumn2,
+ exampleTableColumn3,
+ exampleTableStatus) = mibBuilder.importSymbols(
+ '__EXAMPLE-MIB',
+ 'exampleTableEntry',
+ 'exampleTableColumn2',
+ 'exampleTableColumn3',
+ 'exampleTableStatus'
+)
+rowInstanceId = exampleTableEntry.getInstIdFromIndices('example record one')
+mibInstrumentation = snmpContext.getMibInstrum()
+mibInstrumentation.writeVars(
+ ((exampleTableColumn2.name + rowInstanceId, 'my string value'),
+ (exampleTableColumn3.name + rowInstanceId, 123456),
+ (exampleTableStatus.name + rowInstanceId, 'createAndGo'))
+)
+
+# --- end of SNMP table population ---
+
+# Register SNMP Applications at the SNMP engine for particular SNMP context
+cmdrsp.GetCommandResponder(snmpEngine, snmpContext)
+cmdrsp.SetCommandResponder(snmpEngine, snmpContext)
+cmdrsp.NextCommandResponder(snmpEngine, snmpContext)
+cmdrsp.BulkCommandResponder(snmpEngine, snmpContext)
+
+# Register an imaginary never-ending job to keep I/O dispatcher running forever
+snmpEngine.transportDispatcher.jobStarted(1)
+
+# Run I/O dispatcher which would receive queries and send responses
+try:
+ snmpEngine.transportDispatcher.runDispatcher()
+except:
+ snmpEngine.transportDispatcher.closeDispatcher()
+ raise
diff --git a/examples/v3arch/asyncore/agent/cmdrsp/implementing-snmp-table.py b/examples/v3arch/asyncore/agent/cmdrsp/implementing-static-snmp-table.py
index 0e15599a..0e15599a 100644
--- a/examples/v3arch/asyncore/agent/cmdrsp/implementing-snmp-table.py
+++ b/examples/v3arch/asyncore/agent/cmdrsp/implementing-static-snmp-table.py