C++ Pdu::get_request_id方法代码示例

int Snmp::run_transaction(Pdu& pdu, UdpTarget& target)
{
  int rc, done = 0;

  // 1. set unique id to match this packet on return
  size_t hold_req_id = req_id_++;
  set_request_id(&pdu, hold_req_id);

  // 2. write request to agent
  transaction trans(pdu, target, iv_snmp_session_);

  // this call blocks while it attempts to retrieve agent response
  while (!done) {
    if ((rc = trans.run()) < 0) {
       last_transaction_status_ = rc;
       return rc;
    }
    else {
      trans.result(pdu);
      // verify this is the pdu we are after
      if (pdu.get_request_id() == hold_req_id)
        done = 1 ;
    }
  }
  return 0;
}

wpdu::wpdu(const Pdu& pdu, const UdpTarget& target):
   valid_flag_(SNMP_CLASS_INVALID ), comm_len(MAX_COMM_STR_LEN)
{
   reset_iov(iovec_);
   version_ = target.get_version();
   int status;
   OctetStr comm_str;

   community_name[0] = 0;

   snmp_pdu *raw_pdu;   // create a raw pdu
   raw_pdu = cmu_snmp::pdu_create( (int) pdu.get_type());
   if (!raw_pdu) {
     valid_flag_ = SNMP_CLASS_RESOURCE_UNAVAIL;
     return;
   }

   raw_pdu->reqid = pdu.get_request_id();
   raw_pdu->errstat= (unsigned long) pdu.get_error_status();
   raw_pdu->errindex= (unsigned long) pdu.get_error_index();

   switch (raw_pdu->command) {
     case sNMP_PDU_GET:
     case sNMP_PDU_GETNEXT:
       target.get_read_community(comm_str);
       break;

     case sNMP_PDU_SET:
       target.get_write_community(comm_str);
       break;

     case sNMP_PDU_V1TRAP:
       target.get_read_community(comm_str);
       if (set_trap_info(raw_pdu, pdu)) // will free raw_pdu
          return;
       break;
     case sNMP_PDU_RESPONSE:
       break;

   default:
     ACE_ASSERT(0);
     return;
   }

   if (load_vbs(raw_pdu, pdu)) {
     cmu_snmp::free_pdu( raw_pdu);
     valid_flag_ = SNMP_CLASS_RESOURCE_UNAVAIL;
     return;
   }

   // TODO: determine how big raw_pdu serializes out to
   iovec_.iov_len = target.get_max_pdu_size();
   ACE_NEW(iovec_.iov_base, char [iovec_.iov_len]);

   // create raw byte stream
   // The intermediate integer is to avoid type-punned pointer
   // dereferencing.
   int out_length = iovec_.iov_len;
   status = cmu_snmp::build( raw_pdu,
                            (unsigned char *)iovec_.iov_base,
                            &out_length,
                            target.get_version(),
                            comm_str.data(),
                            comm_str.length());
   iovec_.iov_len = out_length;

   if ( status != 0) {
     valid_flag_ = SNMP_ERROR_WRONG_ENCODING;
     cmu_snmp::free_pdu( raw_pdu);
     return;
   }

   cmu_snmp::free_pdu( raw_pdu);
   valid_flag_ = SNMP_CLASS_SUCCESS;
}

int CSNMPMessage::SetPdu(const int reason, const Pdu &pdu,
			 const UdpAddress &fromaddress)
{
  if (Pdu::match_type(m_pdu.get_type(), pdu.get_type()) == false)
  {
    LOG_BEGIN(INFO_LOG | 1);
    LOG("MsgQueue: Response pdu type does not match, pdu is ignored: (id) (type1) (type2)");
    LOG(m_uniqueId);
    LOG(m_pdu.get_type());
    LOG(pdu.get_type());
    LOG_END;

    return -1;
  }

  unsigned short orig_type = m_pdu.get_type();
  if (m_received)
  {
    LOG_BEGIN(WARNING_LOG | 1);
    LOG("MsgQueue: Message is already marked as received (id) (reason) (new reason)");
    LOG(m_uniqueId);
    LOG(reason);
    LOG(m_reason);
    LOG_END;

    // TODO: better check based on error codes
    if (reason || !m_reason)
    {
      LOG_BEGIN(WARNING_LOG | 1);
      LOG("MsgQueue: ignoring the second pdu");
      LOG_END;

      return 0;
    }
  }
  m_received = 1;
  m_pdu = pdu;
  m_reason = reason;

  LOG_BEGIN(DEBUG_LOG | 10);
  LOG("MsgQueue: Response received (req id) (status) (msg id)");
  LOG(pdu.get_request_id());
  LOG(reason);
#ifdef _SNMPv3
  LOG(pdu.get_message_id());
#endif
  LOG_END;

  if ((orig_type == sNMP_PDU_INFORM) &&
      (m_pdu.get_type() == sNMP_PDU_RESPONSE))
  {
    // remove the first two vbs of the pdu if sysUpTime and notify_id
    if (m_pdu.get_vb_count() < 2)
      return 0;

    const Vb &vb1 = m_pdu.get_vb(0);
    if (vb1.get_syntax() != sNMP_SYNTAX_TIMETICKS)   return 0;
    if (vb1.get_oid()    != SNMP_MSG_OID_SYSUPTIME)  return 0;

    const Vb &vb2 = m_pdu.get_vb(1);
    if (vb2.get_syntax() != sNMP_SYNTAX_OID)         return 0;
    if (vb2.get_oid()    != SNMP_MSG_OID_TRAPID)     return 0;

    TimeTicks timeticks;
    Oid oid;

    vb1.get_value(timeticks);
    m_pdu.set_notify_timestamp(timeticks);

    vb2.get_value(oid);
    m_pdu.set_notify_id(oid);

    m_pdu.delete_vb(1);
    m_pdu.delete_vb(0);
  }
  return 0;
}