SNMPv3 到 SNMPv2 粘合层 [英] SNMPv3 to SNMPv2 glue layer
问题描述
我被要求在远程 Unix 平台上安装 HP OpenView 代理,以捕获客户端应用程序转发的 SNMP 陷阱.
I have been asked to install an HP OpenView agent onto a remote Unix platform to capture SNMP traps forwarded by a client application.
此后我发现客户端应用程序只能转发 SNMPv3 陷阱,而我们使用的代理只能接受 SNMPv2 陷阱.
I have since discovered that the client application can only forward SNMPv3 traps, and the agents we use can only accept SNMPv2 traps.
我发现我可以通过使用 Perl 模块来解决这个问题 NetSNMP::TrapReceiver
但我不清楚这是如何设置的,或者如何/是否可以将 v3 陷阱转换为 v2 陷阱.
I have discovered that I may be able to resolve this issue through the use of the Perl module NetSNMP::TrapReceiver
but I am unclear how this is setup or how/if you can convert a v3 trap to a v2 trap.
我的目标是捕获 v3 陷阱,并希望通过脚本或工具将其转换为 v2 陷阱并将其发送回备用端口.
My goal is to capture the v3 trap and, hopefully via a script or tool, convert this to a v2 trap and send it back out on an alternative port.
推荐答案
碰巧我现在有同样的任务.所以我对 NetSNMP::TrapReceiver 的决定在这里:
By chance I have same task for now. So my decision with NetSNMP::TrapReceiver is here:
#!/usr/bin/perl
use strict;
use warnings;
use diagnostics;
use Net::SNMP;
use SNMP;
use Switch;
my $snmpTrapDestHost = "127.0.0.1";
my $snmpTrapRemotePort = 16162; #other than default trap port or we got infinite trap loop
my $snmpTrapCommunity = "public";
my $snmpTrapVersion = "2c";
my $sess = new SNMP::TrapSession(DestHost => $snmpTrapDestHost, Community => $snmpTrapCommunity, Version => $snmpTrapVersion, RemotePort => $snmpTrapRemotePort);
sub my_receiver {
print "********** PERL RECEIVED A NOTIFICATION:\n";
my @bunchOfVarbinds;
foreach my $x (@{$_[1]})
{
printf "'%s' type='%d' value='%s'\n", $x->[0], $x->[2], $x->[1];
my $lsOid = $x->[0];
my $liOid = &SNMP::translateObj($lsOid);
my $lsVal = $x->[1];
my $lType = $x->[2];
my $lVal;
# You need some convertion here, cause we got data in "human readable" format
switch($lType)
{
case Net::SNMP::OBJECT_IDENTIFIER
{
$lType = "OBJECTID";
if ($lsVal =~ /OID\:\s+(.*)$/)
{
$lVal = $1
}
else
{
$lVal = $lsVal;
}
$lVal = &SNMP::translateObj($lVal);
}
case Net::SNMP::TIMETICKS
{
$lType = "TICKS";
if($lsVal =~ /Timeticks\:\s+\((\d+)\)\s+.*$/)
{
$lVal = $1;
}
else
{
my ($d, $h, $m, $s) = split(/\:/, $lsVal);
$lVal = $d * 24;
$lVal = ($lVal + $h)*60;
$lVal = ($lVal + $m)*60;
$lVal = ($lVal + $s)*100;
}
}
case Net::SNMP::OCTET_STRING
{
$lType = "OCTETSTR";
my $isHex;
($isHex, $lVal) = split(/STRING\:\s*/, $lsVal);
if (!defined($lVal))
{
$lVal = $lsVal;
}
$lVal =~ s/"//g;
if (defined($isHex))
{
if($isHex eq "Hex-")
{
$lVal =~ s/\n//g;
$lVal =~ s/ //g;
}
}
}
case Net::SNMP::INTEGER
{
$lType = "INTEGER";
$lVal = $lsVal;
}
case Net::SNMP::IPADDRESS
{
# IPADDR
# NETADDR
$lType = "IPADDR";
$lVal = $lsVal;
}
case Net::SNMP::COUNTER
{
# COUNTER
$lType = "COUNTER";
$lVal = $lsVal;
}
case Net::SNMP::COUNTER64
{
# COUNTER64
$lType = "COUNTER64";
$lVal = $lsVal;
}
case Net::SNMP::GAUGE
{
# GAUGE
$lType = "GAUGE";
$lVal = $lsVal;
}
case Net::SNMP::NULL
{
# NULL
$lType = "NULL";
$lVal = $lsVal;
}
else
{
# UINTEGER
# OPAQUE
$lVal = $lsVal;
}
}
push @bunchOfVarbinds, new SNMP::Varbind([$liOid, undef, $lVal, $lType]);
}
my $vl = new SNMP::VarList(@bunchOfVarbinds);
$sess->trap(
oid => $initiTrapProxyServiceOid,
uptime => $trapUptimeValue,
$vl
);
return NETSNMPTRAPD_HANDLER_OK;
}
$SNMP::use_numeric = 1;
NetSNMP::TrapReceiver::register("all", \&my_receiver) ||
warn "failed to register perl trap handler\n";
print STDERR "Loaded perl snmptrapd handler\n";
我是 perl 的新手,所以不胜感激.
I am newbie in perl so any fixes are appreciated.
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