void callback( int reason, Snmp *snmp, Pdu &pdu, SnmpTarget &target, void *cd)
{
Vb nextVb;
int pdu_error;
cout << "reason: " << reason << endl
<< "msg: " << snmp->error_msg(reason) << endl;
pdu_error = pdu.get_error_status();
if (pdu_error) {
cout << "Response contains error: "
<< snmp->error_msg(pdu_error)<< endl;
}
for (int i=0; i<pdu.get_vb_count(); i++)
{
pdu.get_vb(nextVb, i);
cout << "Oid: " << nextVb.get_printable_oid() << endl
<< "Val: " << nextVb.get_printable_value() << endl;
}
if (pdu.get_type() == sNMP_PDU_INFORM) {
cout << "pdu type: " << pdu.get_type() << endl;
cout << "sending response to inform: " << endl;
nextVb.set_value("This is the response.");
pdu.set_vb(nextVb, 0);
snmp->response(pdu, target);
}
cout << endl;
}
// callback : have received a Pdu from the target host with given read comm str
// this is really simplistic, but gives the general idea
int agent_impl::handle_get( Pdu &pdu, UdpTarget &target)
{
ACE_TRACE("agent_impl::handle_get");
OctetStr mgr_rd_str, agent_rd_str;
target.get_read_community(mgr_rd_str); // requster's read community string
tgt_.get_read_community(agent_rd_str); // this agent's read community string
// 1. verify we have a valid read string else drop pdu (no response to caller)
if (mgr_rd_str != agent_rd_str) {
ACE_DEBUG((LM_DEBUG, "agent_impl::handle_get: invalid read community recvd\n"));
return 0;
}
// 2. iterate over each varbind in the pdu, filling providing responses
int fdone = 0;
for (int i = 0; (i < pdu.get_vb_count()) && !fdone; i++) {
Vb vb;
pdu.get_vb(vb, i);
if (get_response(vb)) { // set a value for the oid if we can else
set_error_status(&pdu, SNMP_ERROR_NO_SUCH_NAME); // these ought to be member
set_error_index(&pdu, i); // functions but are not yet...
fdone++; // trigger flag to exit loop early
}
else // failed, return noSuch error
pdu.set_vb(vb, i);
}
// 3. lastly, return the pkt to the caller
return respond(pdu, target);
}
void MainWindow::async_callback(int reason, Snmp * /*snmp*/, Pdu &pdu,
SnmpTarget &target)
{
Vb nextVb;
int pdu_error;
QString prefix_text;
QString notify_text;
push_button_get_next->setEnabled(true);
// What is the reason for this callback?
if (reason == SNMP_CLASS_NOTIFICATION)
{
prefix_text = "Trap: ";
// get the notify id for traps
Oid id;
pdu.get_notify_id(id);
notify_text = QString(" ID: %1 Type %2 -- ").arg(id.get_printable())
.arg(pdu.get_type());
}
else if (reason == SNMP_CLASS_ASYNC_RESPONSE)
{
prefix_text = "Response ";
}
else if (reason == SNMP_CLASS_TIMEOUT)
{
prefix_text = "Timeout ";
}
else
{
QString err = QString("\nDid not receive async response/trap: (%1) %2\n")
.arg(reason).arg(Snmp::error_msg(reason));
text_edit_output->append(err);
}
// Look at the error status of the Pdu
pdu_error = pdu.get_error_status();
if (pdu_error)
{
QString err = "\nResponse contains error:\n";
err += Snmp::error_msg(pdu_error);
text_edit_output->append(err);
return;
}
// The Pdu must contain at least one Vb
if (pdu.get_vb_count() == 0)
{
QString err = "\nPdu is empty\n";
text_edit_output->append(err);
return;
}
for (int i=0; i<pdu.get_vb_count(); i++)
{
// Get the Vb of the Pdu
pdu.get_vb(nextVb, i);
// Get Oid and value from the Vb and display it
line_edit_obj_id->setText(nextVb.get_printable_oid());
line_edit_value->setText(nextVb.get_printable_value());
text_edit_output->append(prefix_text +
target.get_address().get_printable() +
" -- " +
notify_text +
line_edit_obj_id->text() + " = " +
line_edit_value->text() + "\n");
}
// If we received a inform pdu, we have to send a response
if (pdu.get_type() == sNMP_PDU_INFORM)
{
text_edit_output->append("Sending response to inform.\n");
// just change the value of the first vb
pdu.get_vb(nextVb, 0);
nextVb.set_value("This is the response.");
pdu.set_vb(nextVb, 0);
snmp->response(pdu, target);
}
}
const list<pair<string,string> > & SnmpDG::GetMibTable(const snmp_version version, const SnmpPara& spr, const string oid) const
{
m_mib_table.clear();
if(!m_inited_success)
{
return m_mib_table;
}
Snmp::socket_startup(); // Initialize socket subsystem
UdpAddress address( spr.ip.c_str());
Oid myoid(oid.c_str()); // default is sysDescr
if( !myoid.valid())
{// check validity of user oid
return m_mib_table;
}
Pdu pdu; // construct a Pdu object
Vb vb; // construct a Vb object(SNMP++ Variable Binding)
vb.set_oid(myoid);//oid.c_str());
pdu += vb;
CTarget ctarget(address);
ctarget.set_version( version );
ctarget.set_retry(spr.retry);
ctarget.set_timeout(spr.timeout);
ctarget.set_readcommunity(spr.community.c_str());
SnmpTarget *target;
target = &ctarget;
int status;
Snmp snmp(status, 0, false);
if (status == SNMP_CLASS_SUCCESS)
{
DWORD dwStartTime_ttl = GetTickCount();
DWORD dwStartTime = 0, dwEndTime = 0;
while ( (status = snmp.get_next(pdu, *target)) == SNMP_CLASS_SUCCESS) //get_next命令是按列遍历oid
{
pdu.get_vb(vb, 0);
Oid oid_tmp = vb.get_oid();//.get_printable_oid();该表项的oid
string str_oid_tmp = oid_tmp.get_printable();
if(oid_tmp.nCompare(myoid.len(), myoid) != 0)//判断是否已越界，如果是则结束循环
{
break;
}
bool bNew = true;
string value_tmp = vb.get_printable_value();
for(std::list<pair<string,string> >::iterator item = m_mib_table.begin();
item != m_mib_table.end();
item++)
{
if(item->first == str_oid_tmp)//value_tmp)//去掉重复的oid
{
bNew = false;
cout << "ip:" + spr.ip + ",repeat oid:" + str_oid_tmp;
break;
}
}
if(bNew)
{
dwStartTime = GetTickCount();
m_mib_table.push_back(make_pair(str_oid_tmp,value_tmp));
vb.set_oid(oid_tmp);
vb.set_null();
pdu.set_vb(vb,0);
}
else
{
// if ( GetTickCount() - dwStartTime > 10000 ) //10s
//{
// cout << "Timeout because read repeat data " << endl;
break;
//}
}
if ( GetTickCount() - dwStartTime_ttl > 300000 ) //5min
{
cout << "Timeout because read operation " << endl;
break;
}
}
}
else
{
cout << "SNMP++ Session Create Fail, " << snmp.error_msg(status) << "\n";
SetLastError(status);
}
Snmp::socket_cleanup(); // Shut down socket subsystem
return m_mib_table;
}
