Hello!
I use source code from
http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_Subagent tutorial.
I have run "snmpd -Le -f -Dagentx" under one consloe and "./subagent"
compiled from that sources under other console.
I have added to the subage code:
...
debug_register_tokens("nstAgentSubagentObject");
debug_register_tokens("snmp_alarm");
debug_register_tokens("agentx");
snmp_set_do_debugging(1);
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET, "udp:localhost:705");
...
Then
linux-h110 /root# snmpget -v1 -c rwpublic localhost
.1.3.6.1.4.1.8072.2.4.1.1.2.0
Timeout: No Response from localhost.
TCPDUMP shows:
linux-h110 /root# tcpdump -i lo
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lo, link-type EN10MB (Ethernet), capture size 96 bytes
01:30:50.063287 IP localhost.33763 > localhost.snmp: C=rwpublic
GetRequest(33) E:8072.2.4.1.1.2.0
01:30:51.066819 IP localhost.33763 > localhost.snmp: C=rwpublic
GetRequest(33) E:8072.2.4.1.1.2.0
01:30:52.069128 IP localhost.33763 > localhost.snmp: C=rwpublic
GetRequest(33) E:8072.2.4.1.1.2.0
01:30:53.071589 IP localhost.33763 > localhost.snmp: C=rwpublic
GetRequest(33) E:8072.2.4.1.1.2.0
01:30:54.074751 IP localhost.33763 > localhost.snmp: C=rwpublic
GetRequest(33) E:8072.2.4.1.1.2.0
01:30:55.077898 IP localhost.33763 > localhost.snmp: C=rwpublic
GetRequest(33) E:8072.2.4.1.1.2.0
SNMPD shows:
agentx/master: agentx master handler starting, mode = 0xa0
agentx/master: request for variable
(NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0)
agentx: sending pdu (req=0x2,trans=0x1,sess=0x6)
agentx_build: packet built okay
agentx/master: agentx master handler starting, mode = 0xa0
agentx/master: request for variable
(NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0)
agentx: sending pdu (req=0x4,trans=0x3,sess=0x6)
agentx_build: packet built okay
agentx/master: agentx master handler starting, mode = 0xa0
agentx/master: request for variable
(NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0)
agentx: sending pdu (req=0x6,trans=0x5,sess=0x6)
agentx_build: packet built okay
agentx/master: agentx master handler starting, mode = 0xa0
agentx/master: request for variable
(NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0)
agentx: sending pdu (req=0x8,trans=0x7,sess=0x6)
agentx_build: packet built okay
agentx/master: agentx master handler starting, mode = 0xa0
agentx/master: request for variable
(NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0)
agentx: sending pdu (req=0xa,trans=0x9,sess=0x6)
agentx_build: packet built okay
agentx/master: agentx master handler starting, mode = 0xa0
agentx/master: request for variable
(NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0)
agentx: sending pdu (req=0xc,trans=0xb,sess=0x6)
agentx_build: packet built okay
SUBAGENT nothing receives:
linux-h110 /root# ./subagent
registered debug token nstAgentSubagentObject, 1
registered debug token snmp_alarm, 1
registered debug token agentx, 1
agentx_register_app_config_handler: registering .conf token for
"agentxsocket"
agentx/subagent: initializing....
agentx/subagent: subagent_init sess 0804f078
agentx/subagent: initializing.... DONE
nstAgentSubagentObject: Initializing the nstAgentSubagentObject module
nstAgentSubagentObject: Initalizing nstAgentSubagentObject scalar integer.
Default value = 123
nstAgentSubagentObject: Done initalizing nstAgentSubagentObject module
agentx/subagent: connecting to master...
agentx/subagent: agentx_reopen_session(0) called
agentx/subagent: opening session...
agentx/subagent: opening session
agentx_build: packet built okay
agentx/subagent: synching input, op 0x01
agentx/subagent: open
agentx/subagent: trap session registered OK
agentx/subagent: registering callbacks for session 0x8053e90
NET-SNMP version 5.4.2.1 AgentX subagent connected
agentx/subagent: opening session... DONE (0x8053e90)
agentx/subagent: registering:
NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0
agentx_build: packet built okay
agentx/subagent: synching input, op 0x01
agentx/subagent: registered
agentx/subagent: register ping alarm every 3600 seconds
snmp_alarm: registered alarm 1, t = 3600.000, flags=0x01
snmp_alarm: no alarms found to schedule
example-demon is up and running.
SNMPD.CONF:
master agentx
agentXSocket udp:192.168.89.130:705
syslocation Server Room
syscontact Sysadmin (r...@localhost)
rocommunity ropublic #localhost 192.168.89.130 192.168.89.129
rwcommunity rwpublic #localhost 192.168.89.130 192.168.89.129
trap2sink 192.168.89.130
trap2sink 192.168.89.129
Let me know please which settings are missed to pass get requests to
subagent?
Notice: if I shutdown subagent and run snmpget -v1 -c rwpublic localhost
nstAgentSubagentObject.0 I get:
linux-h110 /root# snmpget -v1 -c rwpublic localhost nstAgentSubagentObject.0
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: NET-SNMP-TUTORIAL-MIB::nstAgentSubagentObject.0
--
/BR, Alexander
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