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authornobody <nobody@ae88bc3d-4319-0410-8dbf-d08b4c9d3795>2003-11-03 23:23:22 +0000
committernobody <nobody@ae88bc3d-4319-0410-8dbf-d08b4c9d3795>2003-11-03 23:23:22 +0000
commit88e92c489becdf6bf1613955d6d4afe2dea235ae (patch)
tree1c65178c73ddd1fb30e53ae3ea7ad5e159f665aa /ASNMP/asnmp/snmp.cpp
parentb74c3ce9b719f1b325370d067ad44fa2404a23c3 (diff)
downloadATCD-unlabeled-1.1.6.tar.gz
This commit was manufactured by cvs2svn to create branchunlabeled-1.1.6
'unlabeled-1.1.6'.
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diff --git a/ASNMP/asnmp/snmp.cpp b/ASNMP/asnmp/snmp.cpp
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-// $Id$
-
-// ============================================================================
-//
-// = LIBRARY
-// asnmp
-//
-// = FILENAME
-// snmp.cpp
-//
-// = DESCRIPTION
-// The basic SNMPv1 API - blocking version using UDP/IPv4 transport
-// and addressing.
-//
-// = AUTHOR
-// Peter E Mellquist class design/orig code
-// Michael R MacFaden mrm@cisco.com / rework API, use ACE facilities
-// ============================================================================
-/*===================================================================
- Copyright (c) 1996
- Hewlett-Packard Company
-
- ATTENTION: USE OF THIS SOFTWARE IS SUBJECT TO THE FOLLOWING TERMS.
- Permission to use, copy, modify, distribute and/or sell this software
- and/or its documentation is hereby granted without fee. User agrees
- to display the above copyright notice and this license notice in all
- copies of the software and any documentation of the software. User
- agrees to assume all liability for the use of the software; Hewlett-Packard
- makes no representations about the suitability of this software for any
- purpose. It is provided "AS-IS without warranty of any kind,either express
- or implied. User hereby grants a royalty-free license to any and all
- derivatives based upon this software code base.
-=====================================================================*/
-
-
-#define INCLUDE_SNMP_ERR_STRINGS_
-
-//----[ snmp++ includes ]----------------------------------------------
-#include "asnmp/snmp.h" // class def for this module
-#include "asnmp/oid.h" // class def for oids
-#include "asnmp/enttraps.h" // class def for well known trap oids
-#include "asnmp/vb.h" // class def for vbs
-#include "asnmp/address.h" // class def for addresses
-#include "asnmp/wpdu.h" // adapter to cmu_library / wire protocol
-#include "asnmp/transaction.h" // synchronous transaction processor
-#include "ace/OS_NS_string.h"
-#include "ace/OS_NS_unistd.h"
-#include "ace/OS_NS_time.h"
-
-ACE_RCSID(asnmp, snmp, "$Id$")
-
-const coldStartOid coldStart;
-const warmStartOid warmStart;
-const linkDownOid linkDown;
-const linkUpOid linkUp;
-const authenticationFailureOid authenticationFailure;
-const egpNeighborLossOid egpNeighborLoss;
-const snmpTrapEnterpriseOid snmpTrapEnterprise;
-
-char Snmp::host_name_[MAXHOSTNAMELEN] = "";
-
-Snmp::Snmp(unsigned short port): result_(0), construct_status_(SNMP_CLASS_ERROR), last_transaction_status_(0)
-{
- ACE_TRACE("Snmp::Snmp");
-
- ACE_INET_Addr addr(port); // any port,address is ok
- if (iv_snmp_session_.open(addr) < 0) {
- last_transaction_status_ = errno; // open udp/ipv4 socket
- ACE_DEBUG((LM_DEBUG, "Snmp::snmp::open port %d failed", port));
- return;
- }
-
- // initial request id randomly generated then monotonically incremented
- req_id_ = (unsigned) ACE_OS::time(0);
-
- construct_status_ = SNMP_CLASS_SUCCESS;
- return;
-}
-
-Snmp::~Snmp()
-{
- ACE_TRACE("Snmp::~Snmp");
- iv_snmp_session_.close();
-}
-
-int Snmp::valid() const
-{
- return construct_status_;
-}
-
-// given error code, return string definition
-// class version
-// static
-const char * Snmp::error_string(int last_transaction_status_)
-{
- ACE_TRACE("Snmp::error_string");
-
- return ((last_transaction_status_ < 0) ?
- ((last_transaction_status_ < MAX_NEG_ERROR)?
- nErrs[ abs(MAX_NEG_ERROR) + 1] : nErrs[abs(last_transaction_status_)]):
- ((last_transaction_status_ > MAX_POS_ERROR)?
- pErrs[MAX_POS_ERROR+1] : pErrs[last_transaction_status_]));
-}
-
-// instance version
-const char * Snmp::error_string()
-{
- return Snmp::error_string(last_transaction_status_);
-}
-
-void Snmp::check_default_port(UdpTarget& target, unsigned short port)
-{
- UdpAddress tmp;
- target.get_address(tmp);
- if (tmp.get_port() == 0) {
- tmp.set_port(port);
- target.set_address(tmp);
- }
-}
-
-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;
-}
-
-int Snmp::run_transaction(Pdu& pdu, UdpTarget& target, Snmp_Result * cb)
-{
- if (!cb)
- return run_transaction(pdu, target);
-
- // 1. set unique id to match this packet on return
- hold_req_id_ = req_id_++;
- set_request_id(&pdu, hold_req_id_);
- pdu_ = &pdu;
- result_ = cb;
-
- // 2. write request to agent
- transaction * trans = new transaction(pdu, target, iv_snmp_session_);
- return trans->run(this);
-}
-
-void Snmp::result(transaction *t, int rc)
-{
- t->result(*pdu_);
- // verify this is the pdu we are after
- if (pdu_->get_request_id() == hold_req_id_)
- {
- last_transaction_status_ = rc;
- delete t;
- result_->result(this, rc);
- }
- else
- {
- rc = t->run(this);
- if (rc < 0)
- {
- delete t;
- result_->result(this, rc);
- }
- }
-}
-
-int Snmp::validate_args(const Pdu& pdu, const UdpTarget& target) const
-{
- // 0. check object status
- if (construct_status_ != SNMP_CLASS_SUCCESS)
- return construct_status_;
-
- // 1. check args passed
- if ( !pdu.valid() || !target.valid() )
- return SNMP_INVALID_ARGS;
- return 0;
-}
-
-// SYNC API: write request to wire then wait for reply or timeout
-int Snmp::get( Pdu &pdu, UdpTarget &target, Snmp_Result * cb)
-{
- ACE_TRACE("Snmp::get");
- int rc;
- if ((rc = validate_args(pdu, target)) != 0)
- return rc;
-
- pdu.set_type( sNMP_PDU_GET);
- check_default_port(target);
- return run_transaction(pdu, target, cb);
-}
-
-int Snmp::get_next( Pdu &pdu, UdpTarget &target, Snmp_Result * cb)
-{
- ACE_TRACE("Snmp::get_next");
- int rc;
- if ((rc = validate_args(pdu, target)) != 0)
- return rc;
-
- pdu.set_type( sNMP_PDU_GETNEXT);
- check_default_port(target);
- return run_transaction(pdu, target, cb);
-}
-
-int Snmp::set( Pdu &pdu, UdpTarget &target, Snmp_Result * cb)
-{
- ACE_TRACE("Snmp::set");
- int rc;
- if ((rc = validate_args(pdu, target)) != 0)
- return rc;
-
- pdu.set_type( sNMP_PDU_SET);
- check_default_port(target);
- return run_transaction(pdu, target, cb);
-}
-
-// one way, best of luck, non-confirmed alert
-int Snmp::trap( Pdu &pdu, UdpTarget &target)
-{
- ACE_TRACE("Snmp::trap");
- int rc;
- if ((rc = validate_args(pdu, target)) != 0)
- return rc;
-
- pdu.set_type( sNMP_PDU_V1TRAP);
- check_default_port(target, DEF_TRAP_PORT);
-
- // 2. write request to agent
- transaction trans(pdu, target, iv_snmp_session_);
- if (trans.send() > 0) // expect number of bytes sent on
- return 0;
-
- last_transaction_status_ = SNMP_CLASS_INTERNAL_ERROR;
- return -1;
-}
-
-// Allow host name to be overriden. Supplying a null pointer or zero
-// length string removes the override.
-void Snmp::override_host_name(const char* name)
-{
- if (name)
- {
- ACE_OS::strncpy(host_name_, name, MAXHOSTNAMELEN);
- host_name_[MAXHOSTNAMELEN-1] = 0;
- }
- else {
- host_name_[0] = 0;
- }
-}
-
-// Returns the current host name in the supplied string.
-void Snmp::get_host_name(char* name, int len)
-{
- if (name)
- {
- if (ACE_OS::strlen(host_name_) > 0)
- {
- ACE_OS::strncpy(name, host_name_, len);
- name[len-1] = 0;
- }
- else
- {
- if (ACE_OS::hostname(name, len-1) == -1)
- name[0] = 0;
- }
- }
-}
-
-Snmp_Result::~Snmp_Result() {}