Indy SNMP and C++ Builder XE3 - c++

Question

I'm trying to use Indy SNMP component but is having problems
The following code
try
{
TIdSNMP* client = new TIdSNMP();
String host = "192.168.123.123";
String mib = "1.3.6.1.2.1.1.5.0";
Log(lInfo) << "Test simple SNMP call on server: " << host;
client->Host = host;
client->BoundIP = "192.168.123.1";
client->Community = "public";
client->ReceiveTimeout = 1000;
client->Query->Clear();
client->Query->PDUType = PDUGetRequest;
client->Query->MIBAdd(mib,"");
if (client->SendQuery())
//...
}
else
{
Log(lInfo) << "*** Query not sent *** ";
}
delete client;
}
catch (const Exception & ex)
{
Log(lInfo) << Mylog(L"ERROR [%s] ", ex.Message.c_str());
}
keep returning false on the SendQuery line, while using the snmpget client in a terminal gives proper result
>/Users/matsk:\> snmpget -v 2c -c public 192.168.123.123 1.3.6.1.2.1.1.5.0
SNMPv2-MIB::sysName.0 = STRING: Watchdog 15
where
SNMPv2-MIB::sysName.0 = STRING: Watchdog 15
is an expected return string from a temperature measuring device.
Or using version 1
>/Users/matsk:\> snmpget -v 1 -c public 192.168.123.123 1.3.6.1.2.1.1.5.0
SNMPv2-MIB::sysName.0 = STRING: Watchdog 15
I should add to the question that the device is connected to the local computer using a Ethernet -> USB dongle and is on a different 'subnet' than my regular internet connection. I'm not sure if that may add to Indy's behavior?
Doing a ipconfig /all gives for the relevant ethernet adapter, as suggested by Remy L.
Ethernet adapter Ethernet 2:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Linksys USB3GIGV1
Physical Address. . . . . . . . . : 94-10-3E-B7-D7-0A
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::bc9f:3659:9f91:2627%24(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.123.1(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 412356670
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-21-70-32-91-D8-CB-8A-BC-E5-B
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled
from where I used BoundIP = 192.168.123.1
However, SendQuery() still returns false.
I copied some code from this post:
Indi TIdSNMP : How use SendQuery
Using Wireshark and a filter gives one line
63 47.723731 192.168.123.1 192.168.123.123 SNMP 82 get-request 1.3.6.1.2.1.1.5.0
Interestingly, when using snmpget I get
476 182.830210 192.168.123.1 192.168.123.123 SNMP 83 get-request 1.3.6.1.2.1.1.5.0
Only difference is that the Length record is being 83, instead of 82 for the request using Indy. Not sure if that helps figuring out whats going on?