错误 - （noSuchName）这个MIB中没有这样的变量名 - netSnmp？
我制作了一个私人MIB - RASP-MIB。
这是mib
RASP-MIB DEFINITIONS ::= BEGIN
IMPORTS
OBJECT-TYPE, MODULE-IDENTITY,enterprises FROM SNMPv2-SMI
TEXTUAL-CONVENTION FROM SNMPv2-TC;
rasp MODULE-IDENTITY
LAST-UPDATED "201804210000Z" -- 21 April 2018, midnight
ORGANIZATION "net-snmp"
CONTACT-INFO "postal: ABC HELLO
CHECK 512310
email: net-snmp-coders@lists.sourceforge.net"
DESCRIPTION "A simple mib for Raspberry PI information gathering."
::={enterprises 9100}
RowStatus ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The RowStatus textual convention is used to manage the
creation and deletion of conceptual rows, and is used as the
value of the SYNTAX clause for the status column of a
conceptual row."
SYNTAX INTEGER {
-- the following two values are states:
-- these values may be read or written
active(1), -- state: read/write
notInService(2), -- state: read/write
notReady(3), -- state: read only
createAndGo(4), -- action: write only
createAndWait(5), -- action: write only
destroy(6) -- action: write only
}
raspScalar OBJECT IDENTIFIER ::= {rasp 1}
raspTable OBJECT IDENTIFIER ::= {rasp 2}
freeSpaceAvailable OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION "The free space available in the system in MB"
DEFVAL { 2 }
::= { raspScalar 1 }
scalar2 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION "scalar2"
DEFVAL { 4 }
::= { raspScalar 2 }
raspTableOne OBJECT-TYPE
SYNTAX SEQUENCE OF raspTable1Entry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "Table 1"
::= { raspTable 1 }
raspTable1Entry OBJECT-TYPE
SYNTAX raspTable1Entry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "Entry"
INDEX { tIndex }
::= { raspTableOne 1 }
raspTable1Entry ::= SEQUENCE {
tIndex Integer32,
tName DisplayString,
tMarks Integer32,
tRowStatus INTEGER
}
tIndex OBJECT-TYPE
SYNTAX Integer32 (1..100)
MAX-ACCESS read-only
STATUS current
DESCRIPTION "Index for Table 1"
::= { raspTable1Entry 1 }
tName OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-create
STATUS current
DESCRIPTION "Name for Table 1"
::= { raspTable1Entry 2 }
tMarks OBJECT-TYPE
SYNTAX Integer32(1..100)
MAX-ACCESS read-create
STATUS current
DESCRIPTION "Marks for Table 1"
::= { raspTable1Entry 3 }
tRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION "The status"
::= { raspTable1Entry 4 }
END
接下来，这个mib有一个标量对象 - freeSpaceAvailable。我想用这个。
1）首先我使用snmptranslate翻译了这个
$ snmptranslate -m + RASP-MIB -IR -On freeSpaceAvailable
.1.3.6.1.4.1.9100.1.1
2）接下来，我已经生成了mib2c代码 -
env MIBS="+RASP-MIB" mibc2c freeSpaceAvailable
3）接下来，我修改了这个文件以返回硬编码值
4）将其编译为subAgent
$net-snmp-config --compile-subagent mysubagent freeSpaceAvailable.c
5）启动snmp守护程序
sudo service snmpd start
6）测试它是否正常工作
snmpwalk localhost -c public -v1
7）运行我的子代理
$。/ mysubagent＆amp;
$pidof mysubagent
27709
现在，不知道为什么我会遇到这个问题？
$snmpget -v 1 -c public localhost .1.3.6.1.4.1.9100.1.1
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: iso.3.6.1.4.1.9100.1.1
这是屏幕截图 -
这是freeSpaceAvailable.c代码
/*
* Note: this file originally auto-generated by mib2c using
* $
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "freeSpaceAvailable.h"
static unsigned long myVarUlong = 0;
/** Initializes the freeSpaceAvailable module */
void
init_freeSpaceAvailable(void)
{
const oid freeSpaceAvailable_oid[] =
{ 1, 3, 6, 1, 4, 1, 9100, 1, 1 };
DEBUGMSGTL(("freeSpaceAvailable", "Initializing\n"));
netsnmp_register_scalar(netsnmp_create_handler_registration
("freeSpaceAvailable",
handle_freeSpaceAvailable,
freeSpaceAvailable_oid,
OID_LENGTH(freeSpaceAvailable_oid),
HANDLER_CAN_RWRITE));
}
int
handle_freeSpaceAvailable(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
int ret = -1;
/*
* We are never called for a GETNEXT if it's registered as a
* "instance", as it's "magically" handled for us.
*/
/*
* a instance handler also only hands us one request at a time, so
* we don't need to loop over a list of requests; we'll only get one.
*/
switch (reqinfo->mode) {
case MODE_GET:
snmp_set_var_typed_value(requests->requestvb, ASN_INTEGER, &myVarUlong,sizeof(myVarUlong) );
break;
/*
* SET REQUEST
*
* multiple states in the transaction. See:
* http://www.net-snmp.org/tutorial-5/toolkit/mib_module/set-actions.jpg
*/
case MODE_SET_RESERVE1:
/*
* or you could use netsnmp_check_vb_type_and_size instead
*/
ret = netsnmp_check_vb_type(requests->requestvb, ASN_INTEGER);
if (ret != SNMP_ERR_NOERROR) {
netsnmp_set_request_error(reqinfo, requests, ret);
}
break;
case MODE_SET_RESERVE2:
/*
* XXX malloc "undo" storage buffer
*/
//if ( /* XXX if malloc, or whatever, failed: */ ) {
// netsnmp_set_request_error(reqinfo, requests,
// SNMP_ERR_RESOURCEUNAVAILABLE);
// }
break;
case MODE_SET_FREE:
/*
* XXX: free resources allocated in RESERVE1 and/or
* RESERVE2. Something failed somewhere, and the states
* below won't be called.
*/
break;
case MODE_SET_ACTION:
/*
* XXX: perform the value change here
*/
myVarUlong = (unsigned long)*requests->requestvb->val.integer;
if ( myVarUlong == 0 ) {
netsnmp_set_request_error(reqinfo, requests, ret
);
}
break;
case MODE_SET_COMMIT:
/*
* XXX: delete temporary storage
*/
//if ( /* XXX: error? */ ) {
/*
* try _really_really_ hard to never get to this point
*/
// netsnmp_set_request_error(reqinfo, requests,
// SNMP_ERR_COMMITFAILED);
// }
break;
case MODE_SET_UNDO:
/*
* XXX: UNDO and return to previous value for the object
*/
#if 0
if ( /* XXX: error? */ ) {
/*
* try _really_really_ hard to never get to this point
*/
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_UNDOFAILED);
}
#endif
break;
default:
/*
* we should never get here, so this is a really bad error
*/
snmp_log(LOG_ERR,
"unknown mode (%d) in handle_freeSpaceAvailable\n",
reqinfo->mode);
return SNMP_ERR_GENERR;
}
return SNMP_ERR_NOERROR;
}
似乎主要的SNMP守护程序根本没有得到通知。 我在
中添加了调试信息的/ etc /默认/ SNMPD
SNMPDOPTS =＆＃39; -LS 0-4 d -Lf / dev / null -u snmp -g snmp -I -smux，mteTrigger，mteTriggerConf -p /var/run/snmpd.pid'
在syslog中 -
sudo tail -f /var/log/syslog
Apr 23 16:00:17 pc snmpd[11340]: /etc/snmp/snmpd.conf: line 143: Warning: Unknown token: defaultMonitors.
Apr 23 16:00:17 pc snmpd[11340]: /etc/snmp/snmpd.conf: line 145: Warning: Unknown token: linkUpDownNotifications.
Apr 23 16:00:17 pc snmpd[11340]: /var/lib/snmp/snmpd.conf: line 32: Warning: Unknown token: _mteTTable.
Apr 23 16:00:17 pc snmpd[11340]: /var/lib/snmp/snmpd.conf: line 33: Warning: Unknown token: _mteTTable.
Apr 23 16:00:17 pc snmpd[11340]: /var/lib/snmp/snmpd.conf: line 34: Warning: Unknown token: _mteTTable.
Apr 23 16:00:17 pc snmpd[11340]: /var/lib/snmp/snmpd.conf: line 35: Warning: Unknown token: _mteTTable.
Apr 23 16:00:17 pc snmpd[11340]: /var/lib/snmp/snmpd.conf: line 36: Warning: Unknown token: _mteTTable.
Apr 23 16:00:17 pc snmpd[11340]: /var/lib/snmp/snmpd.conf: line 37: Warning: Unknown token: _mteTTable.
Apr 23 16:00:17 pc snmpd[11340]: /var/lib/snmp/snmpd.conf: line 38: Warning: Unknown token: _mteTTable.
即使我杀死或产生了mysubagent，它也没有任何区别。
1 个答案:
答案 0 :(得分：1)
节点定义中存在一个小错误。它应该是::= { raspScalar 1 }
freeSpaceAvailable OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION "The free space available in the system in MB"
DEFVAL { 2 }
::= { raspScalar 1 }
我使用tkmib（linux）来解决问题。
在this tutorial之后，我得到了很好的回复
c代码片段：
int fSpace;
// inside init_freeSpaceAvailable
fSpace = (int) random();
// inside switch statement
case MODE_GET:
snmp_set_var_typed_value(requests->requestvb, ASN_INTEGER,
(u_char *)&fSpace,
sizeof(fSpace));
break;
在/etc/snmp/snmpd.conf上添加
master agentx
以
开始snmpd sudo snmpd -f -Lo -C --rwcommunity=public --master=agentx --agentXSocket=tcp:localhost:1705
启动代理
./mysubagent -f -Lo -x tcp:localhost:1705
测试为
snmpget -v 1 -c public localhost RASP-MIB::freeSpaceAvailable.0
RASP-MIB::freeSpaceAvailable.0 = INTEGER: 924855091
或OID
snmpget -v 1 -c public -m "+RASP-MIB" localhost 1.3.6.1.4.1.9100.1.1.0
RASP-MIB::freeSpaceAvailable.0 = INTEGER: 924855091
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