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// $OpenLDAP$
/*
* Copyright 2000-2022 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "config.h"
#include "debug.h"
#include "LDAPMessageQueue.h"
#include "LDAPRequest.h"
#include "LDAPResult.h"
#include "LDAPSearchReference.h"
#include "LDAPSearchRequest.h"
#include "LDAPUrl.h"
#include "LDAPUrlList.h"
#include "LDAPException.h"
using namespace std;
// TODO: How to handle unsolicited notifications, like notice of
// disconnection
LDAPMessageQueue::LDAPMessageQueue(LDAPRequest *req){
DEBUG(LDAP_DEBUG_CONSTRUCT, "LDAPMessageQueue::LDAPMessageQueue()" << endl);
m_activeReq.push(req);
m_issuedReq.push_back(req);
}
LDAPMessageQueue::~LDAPMessageQueue(){
DEBUG(LDAP_DEBUG_DESTROY, "LDAPMessageQueue::~LDAPMessageQueue()" << endl);
for(LDAPRequestList::iterator i=m_issuedReq.begin();
i != m_issuedReq.end(); i++){
delete *i;
}
m_issuedReq.clear();
}
LDAPMsg *LDAPMessageQueue::getNext(){
DEBUG(LDAP_DEBUG_TRACE,"LDAPMessageQueue::getNext()" << endl);
if ( m_activeReq.empty() ) {
return 0;
}
LDAPRequest *req=m_activeReq.top();
LDAPMsg *ret=0;
try{
ret = req->getNextMessage();
}catch(LDAPException e){
//do some clean up
m_activeReq.pop();
throw;
}
const LDAPConstraints *constr=req->getConstraints();
switch (ret->getMessageType()) {
case LDAPMsg::SEARCH_REFERENCE :
if (constr->getReferralChase() ){
//throws Exception (limit Exceeded)
LDAPRequest *refReq=chaseReferral(ret);
if(refReq != 0){
m_activeReq.push(refReq);
m_issuedReq.push_back(refReq);
delete ret;
return getNext();
}
}
return ret;
break;
case LDAPMsg::SEARCH_ENTRY :
return ret;
break;
case LDAPMsg::SEARCH_DONE :
if(req->isReferral()){
req->unbind();
}
switch ( ((LDAPResult*)ret)->getResultCode()) {
case LDAPResult::REFERRAL :
if(constr->getReferralChase()){
//throws Exception (limit Exceeded)
LDAPRequest *refReq=chaseReferral(ret);
if(refReq != 0){
m_activeReq.pop();
m_activeReq.push(refReq);
m_issuedReq.push_back(refReq);
delete ret;
return getNext();
}
}
return ret;
break;
case LDAPResult::SUCCESS :
if(req->isReferral()){
delete ret;
m_activeReq.pop();
return getNext();
}else{
m_activeReq.pop();
return ret;
}
break;
default:
m_activeReq.pop();
return ret;
break;
}
break;
//must be some kind of LDAPResultMessage
default:
if(req->isReferral()){
req->unbind();
}
LDAPResult* res_p=(LDAPResult*)ret;
switch (res_p->getResultCode()) {
case LDAPResult::REFERRAL :
if(constr->getReferralChase()){
//throws Exception (limit Exceeded)
LDAPRequest *refReq=chaseReferral(ret);
if(refReq != 0){
m_activeReq.pop();
m_activeReq.push(refReq);
m_issuedReq.push_back(refReq);
delete ret;
return getNext();
}
}
return ret;
break;
default:
m_activeReq.pop();
return ret;
}
break;
}
}
// TODO Maybe moved to LDAPRequest::followReferral seems more reasonable
//there
LDAPRequest* LDAPMessageQueue::chaseReferral(LDAPMsg* ref){
DEBUG(LDAP_DEBUG_TRACE,"LDAPMessageQueue::chaseReferral()" << endl);
LDAPRequest *req=m_activeReq.top();
LDAPRequest *refReq=req->followReferral(ref);
if(refReq !=0){
if(refReq->getConstraints()->getHopLimit() < refReq->getHopCount()){
delete(refReq);
throw LDAPException(LDAP_REFERRAL_LIMIT_EXCEEDED);
}
if(refReq->isCycle()){
delete(refReq);
throw LDAPException(LDAP_CLIENT_LOOP);
}
try {
refReq->sendRequest();
return refReq;
}catch (LDAPException e){
DEBUG(LDAP_DEBUG_TRACE," caught exception" << endl);
return 0;
}
}else{
return 0;
}
}
LDAPRequestStack* LDAPMessageQueue::getRequestStack(){
DEBUG(LDAP_DEBUG_TRACE,"LDAPMessageQueue::getRequestStack()" << endl);
return &m_activeReq;
}
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