SNMP4j实现同步和异步的Walk的示例
目录：
- 环境参数
- 代码示例
- 同步WALK
- 异步WALK
[一]、环境参数
- jdk 1.6.0_18
- snmp4j 1.11.3
[二]、代码示例
1.同步WALK（v2c）
代码：SnmpWalk.java
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package
com
.
micmiu
.
snmp4j
.
demo1x
;
import
java
.
io
.
IOException
;
import
org
.
snmp4j
.
CommunityTarget
;
import
org
.
snmp4j
.
PDU
;
import
org
.
snmp4j
.
Snmp
;
import
org
.
snmp4j
.
TransportMapping
;
import
org
.
snmp4j
.
event
.
ResponseEvent
;
import
org
.
snmp4j
.
mp
.
SnmpConstants
;
import
org
.
snmp4j
.
smi
.
Address
;
import
org
.
snmp4j
.
smi
.
GenericAddress
;
import
org
.
snmp4j
.
smi
.
Integer32
;
import
org
.
snmp4j
.
smi
.
Null
;
import
org
.
snmp4j
.
smi
.
OID
;
import
org
.
snmp4j
.
smi
.
OctetString
;
import
org
.
snmp4j
.
smi
.
VariableBinding
;
import
org
.
snmp4j
.
transport
.
DefaultUdpTransportMapping
;
/**
* 演示：WALK的方式获取值
*
* blog http://www.micmiu.com
*
* @author Michael
*/
public
class
SnmpWalk
{
public
static
final
int
DEFAULT_VERSION
=
SnmpConstants
.
version2c
;
public
static
final
String
DEFAULT_PROTOCOL
=
"udp"
;
public
static
final
int
DEFAULT_PORT
=
161
;
public
static
final
long
DEFAULT_TIMEOUT
=
3
*
1000L
;
public
static
final
int
DEFAULT_RETRY
=
3
;
/**
* 创建对象communityTarget
*
* @param targetAddress
* @param community
* @param version
* @param timeOut
* @param retry
* @return CommunityTarget
*/
public
static
CommunityTarget
createDefault
(
String
ip
,
String
community
)
{
Address
address
=
GenericAddress
.
parse
(
DEFAULT_PROTOCOL
+
":"
+
ip
+
"/"
+
DEFAULT_PORT
)
;
CommunityTarget
target
=
new
CommunityTarget
(
)
;
target
.
setCommunity
(
new
OctetString
(
community
)
)
;
target
.
setAddress
(
address
)
;
target
.
setVersion
(
DEFAULT_VERSION
)
;
target
.
setTimeout
(
DEFAULT_TIMEOUT
)
;
// milliseconds
target
.
setRetries
(
DEFAULT_RETRY
)
;
return
target
;
}
/**
* @param ip
* @param community
* @param oid
*/
public
static
void
snmpWalk
(
String
ip
,
String
community
,
String
targetOid
)
{
CommunityTarget
target
=
SnmpUtil
.
createDefault
(
ip
,
community
)
;
TransportMapping
transport
=
null
;
Snmp
snmp
=
null
;
try
{
transport
=
new
DefaultUdpTransportMapping
(
)
;
snmp
=
new
Snmp
(
transport
)
;
transport
.
listen
(
)
;
PDU
pdu
=
new
PDU
(
)
;
OID
targetOID
=
new
OID
(
targetOid
)
;
pdu
.
add
(
new
VariableBinding
(
targetOID
)
)
;
boolean
finished
=
false
;
System
.
out
.
println
(
"----> demo start <----"
)
;
while
(
!
finished
)
{
VariableBinding
vb
=
null
;
ResponseEvent
respEvent
=
snmp
.
getNext
(
pdu
,
target
)
;
PDU
response
=
respEvent
.
getResponse
(
)
;
if
(
null
==
response
)
{
System
.
out
.
println
(
"responsePDU == null"
)
;
finished
=
true
;
break
;
}
else
{
vb
=
response
.
get
(
0
)
;
}
// check finish
finished
=
checkWalkFinished
(
targetOID
,
pdu
,
vb
)
;
if
(
!
finished
)
{
System
.
out
.
println
(
"==== walk each vlaue :"
)
;
System
.
out
.
println
(
vb
.
getOid
(
)
+
" = "
+
vb
.
getVariable
(
)
)
;
// Set up the variable binding for the next entry.
pdu
.
setRequestID
(
new
Integer32
(
0
)
)
;
pdu
.
set
(
0
,
vb
)
;
}
else
{
System
.
out
.
println
(
"SNMP walk OID has finished."
)
;
snmp
.
close
(
)
;
}
}
System
.
out
.
println
(
"----> demo end <----"
)
;
}
catch
(
Exception
e
)
{
e
.
printStackTrace
(
)
;
System
.
out
.
println
(
"SNMP walk Exception: "
+
e
)
;
}
finally
{
if
(
snmp
!=
null
)
{
try
{
snmp
.
close
(
)
;
}
catch
(
IOException
ex1
)
{
snmp
=
null
;
}
}
}
}
/**
* 1)responsePDU == null<br>
* 2)responsePDU.getErrorStatus() != 0<br>
* 3)responsePDU.get(0).getOid() == null<br>
* 4)responsePDU.get(0).getOid().size() < targetOID.size()<br>
* 5)targetOID.leftMostCompare(targetOID.size(),responsePDU.get(0).getOid())
* !=0<br>
* 6)Null.isExceptionSyntax(responsePDU.get(0).getVariable().getSyntax())<br>
* 7)responsePDU.get(0).getOid().compareTo(targetOID) <= 0<br>
*
* @param resquestPDU
* @param targetOID
* @param responsePDU
* @param vb
* @return
*/
private
static
boolean
checkWalkFinished
(
OID
targetOID
,
PDU
pdu
,
VariableBinding
vb
)
{
boolean
finished
=
false
;
if
(
pdu
.
getErrorStatus
(
)
!=
0
)
{
System
.
out
.
println
(
"[true] responsePDU.getErrorStatus() != 0 "
)
;
System
.
out
.
println
(
pdu
.
getErrorStatusText
(
)
)
;
finished
=
true
;
}
else
if
(
vb
.
getOid
(
)
==
null
)
{
System
.
out
.
println
(
"[true] vb.getOid() == null"
)
;
finished
=
true
;
}
else
if
(
vb
.
getOid
(
)
.
size
(
)
&
lt
;
targetOID
.
size
(
)
)
{
System
.
out
.
println
(
"[true] vb.getOid().size() < targetOID.size()"
)
;
finished
=
true
;
}
else
if
(
targetOID
.
leftMostCompare
(
targetOID
.
size
(
)
,
vb
.
getOid
(
)
)
!=
0
)
{
System
.
out
.
println
(
"[true] targetOID.leftMostCompare() != 0"
)
;
finished
=
true
;
}
else
if
(
Null
.
isExceptionSyntax
(
vb
.
getVariable
(
)
.
getSyntax
(
)
)
)
{
System
.
out
.
println
(
"[true] Null.isExceptionSyntax(vb.getVariable().getSyntax())"
)
;
finished
=
true
;
}
else
if
(
vb
.
getOid
(
)
.
compareTo
(
targetOID
)
&
lt
;
=
0
)
{
System
.
out
.
println
(
"[true] Variable received is not "
+
"lexicographic successor of requested "
+
"one:"
)
;
System
.
out
.
println
(
vb
.
toString
(
)
+
" <= "
+
targetOID
)
;
finished
=
true
;
}
return
finished
;
}
/**
*
* @param args
*/
public
static
void
main
(
String
[
]
args
)
{
String
ip
=
"192.168.8.254"
;
String
community
=
"public"
;
// 1.3.6.1.2.1.2.2.1.2
String
targetOid
=
".1.3.6.1.2.1.1"
;
SnmpWalk
.
snmpWalk
(
ip
,
community
,
targetOid
)
;
}
}
|
运行结果：
|
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|
--
--
&
gt
;
demo
start
&
lt
;
--
--
===
=
walk
each
vlaue
:
1.3.6.1.2.1.1.1.0
=
H3C
ICG2000
H3C
Comware
Platform
Software
Comware
Software
Version
5.20
,
Release
2104P02
Copyright
(
c
)
2004
-
2010
Hangzhou
H3C
Technologies
Co
.
,
Ltd
.
===
=
walk
each
vlaue
:
1.3.6.1.2.1.1.2.0
=
1.3.6.1.4.1.25506.1.287
===
=
walk
each
vlaue
:
1.3.6.1.2.1.1.3.0
=
39
days
,
21
:
47
:
28.41
===
=
walk
each
vlaue
:
1.3.6.1.2.1.1.4.0
=
R
&
amp
;
D
Hangzhou
,
Hangzhou
H3C
Technologies
Co
.
,
Ltd
.
===
=
walk
each
vlaue
:
1.3.6.1.2.1.1.5.0
=
HX_ICG2000
===
=
walk
each
vlaue
:
1.3.6.1.2.1.1.6.0
=
Hangzhou
,
China
===
=
walk
each
vlaue
:
1.3.6.1.2.1.1.7.0
=
78
[
true
]
targetOID
.
leftMostCompare
(
)
!=
0
SNMP
walk
OID
has
finished
.
--
--
&
gt
;
demo
end
&
lt
;
--
--
|
2.异步WALK（v2c）
代码：SnmpWalkAsyn.java
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package
com
.
micmiu
.
snmp4j
.
demo1x
;
import
java
.
util
.
ArrayList
;
import
java
.
util
.
List
;
import
java
.
util
.
concurrent
.
CountDownLatch
;
import
java
.
util
.
concurrent
.
TimeUnit
;
import
org
.
snmp4j
.
CommunityTarget
;
import
org
.
snmp4j
.
PDU
;
import
org
.
snmp4j
.
Snmp
;
import
org
.
snmp4j
.
event
.
ResponseEvent
;
import
org
.
snmp4j
.
event
.
ResponseListener
;
import
org
.
snmp4j
.
mp
.
SnmpConstants
;
import
org
.
snmp4j
.
smi
.
Address
;
import
org
.
snmp4j
.
smi
.
GenericAddress
;
import
org
.
snmp4j
.
smi
.
Integer32
;
import
org
.
snmp4j
.
smi
.
Null
;
import
org
.
snmp4j
.
smi
.
OID
;
import
org
.
snmp4j
.
smi
.
OctetString
;
import
org
.
snmp4j
.
smi
.
VariableBinding
;
import
org
.
snmp4j
.
transport
.
DefaultUdpTransportMapping
;
/**
* 演示：异步GET OID值
*
* blog http://www.micmiu.com
*
* @author Michael
*
*/
public
class
SnmpWalkAsyn
{
public
static
final
int
DEFAULT_VERSION
=
SnmpConstants
.
version2c
;
public
static
final
String
DEFAULT_PROTOCOL
=
"udp"
;
public
static
final
int
DEFAULT_PORT
=
161
;
public
static
final
long
DEFAULT_TIMEOUT
=
3
*
1000L
;
public
static
final
int
DEFAULT_RETRY
=
3
;
/**
* 创建对象communityTarget
*
* @param targetAddress
* @param community
* @param version
* @param timeOut
* @param retry
* @return CommunityTarget
*/
public
static
CommunityTarget
createDefault
(
String
ip
,
String
community
)
{
Address
address
=
GenericAddress
.
parse
(
DEFAULT_PROTOCOL
+
":"
+
ip
+
"/"
+
DEFAULT_PORT
)
;
CommunityTarget
target
=
new
CommunityTarget
(
)
;
target
.
setCommunity
(
new
OctetString
(
community
)
)
;
target
.
setAddress
(
address
)
;
target
.
setVersion
(
DEFAULT_VERSION
)
;
target
.
setTimeout
(
DEFAULT_TIMEOUT
)
;
// milliseconds
target
.
setRetries
(
DEFAULT_RETRY
)
;
return
target
;
}
/**
* 异步采集信息
*
* @param ip
* @param community
* @param oid
*/
public
static
void
snmpAsynWalk
(
String
ip
,
String
community
,
String
oid
)
{
final
CommunityTarget
target
=
createDefault
(
ip
,
community
)
;
Snmp
snmp
=
null
;
try
{
System
.
out
.
println
(
"----> demo start <----"
)
;
DefaultUdpTransportMapping
transport
=
new
DefaultUdpTransportMapping
(
)
;
snmp
=
new
Snmp
(
transport
)
;
snmp
.
listen
(
)
;
final
PDU
pdu
=
new
PDU
(
)
;
final
OID
targetOID
=
new
OID
(
oid
)
;
final
CountDownLatch
latch
=
new
CountDownLatch
(
1
)
;
pdu
.
add
(
new
VariableBinding
(
targetOID
)
)
;
ResponseListener
listener
=
new
ResponseListener
(
)
{
public
void
onResponse
(
ResponseEvent
event
)
{
(
(
Snmp
)
event
.
getSource
(
)
)
.
cancel
(
event
.
getRequest
(
)
,
this
)
;
try
{
PDU
response
=
event
.
getResponse
(
)
;
// PDU request = event.getRequest();
// System.out.println("[request]:" + request);
if
(
response
==
null
)
{
System
.
out
.
println
(
"[ERROR]: response is null"
)
;
}
else
if
(
response
.
getErrorStatus
(
)
!=
0
)
{
System
.
out
.
println
(
"[ERROR]: response status"
+
response
.
getErrorStatus
(
)
+
" Text:"
+
response
.
getErrorStatusText
(
)
)
;
}
else
{
System
.
out
.
println
(
"Received Walk response value :"
)
;
VariableBinding
vb
=
response
.
get
(
0
)
;
boolean
finished
=
checkWalkFinished
(
targetOID
,
pdu
,
vb
)
;
if
(
!
finished
)
{
System
.
out
.
println
(
vb
.
getOid
(
)
+
" = "
+
vb
.
getVariable
(
)
)
;
pdu
.
setRequestID
(
new
Integer32
(
0
)
)
;
pdu
.
set
(
0
,
vb
)
;
(
(
Snmp
)
event
.
getSource
(
)
)
.
getNext
(
pdu
,
target
,
null
,
this
)
;
}
else
{
System
.
out
.
println
(
"SNMP Asyn walk OID value success !"
)
;
latch
.
countDown
(
)
;
}
|