git.sur5r.net Git - openldap/blob - contrib/ldapc++/src/LDAPMessageQueue.cpp

   1 // $OpenLDAP$
   2 /*
   3  * Copyright 2000-2017 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7
   8 #include "config.h"
   9 #include "debug.h"
  10 #include "LDAPMessageQueue.h"
  11 #include "LDAPRequest.h"
  12 #include "LDAPResult.h"
  13 #include "LDAPSearchReference.h"
  14 #include "LDAPSearchRequest.h"
  15 #include "LDAPUrl.h"
  16 #include "LDAPUrlList.h"
  17 #include "LDAPException.h"
  18
  19 using namespace std;
  20
  21 // TODO: How to handle unsolicited notifications, like notice of
  22 //       disconnection
  23
  24 LDAPMessageQueue::LDAPMessageQueue(LDAPRequest *req){
  25     DEBUG(LDAP_DEBUG_CONSTRUCT, "LDAPMessageQueue::LDAPMessageQueue()" << endl);
  26         m_activeReq.push(req);
  27     m_issuedReq.push_back(req);
  28 }
  29
  30 LDAPMessageQueue::~LDAPMessageQueue(){
  31     DEBUG(LDAP_DEBUG_DESTROY, "LDAPMessageQueue::~LDAPMessageQueue()" << endl);
  32     for(LDAPRequestList::iterator i=m_issuedReq.begin();
  33             i != m_issuedReq.end(); i++){
  34         delete *i;
  35     }
  36     m_issuedReq.clear();
  37 }
  38
  39
  40 LDAPMsg *LDAPMessageQueue::getNext(){
  41     DEBUG(LDAP_DEBUG_TRACE,"LDAPMessageQueue::getNext()" << endl);
  42
  43     if ( m_activeReq.empty() ) {
  44         return 0;
  45     }
  46
  47     LDAPRequest *req=m_activeReq.top();
  48     LDAPMsg *ret=0;
  49
  50     try{
  51         ret = req->getNextMessage();
  52     }catch(LDAPException e){
  53         //do some clean up
  54         m_activeReq.pop();
  55         throw;
  56     }
  57
  58     const LDAPConstraints *constr=req->getConstraints();
  59     switch (ret->getMessageType()) {
  60         case LDAPMsg::SEARCH_REFERENCE :
  61             if (constr->getReferralChase() ){
  62                 //throws Exception (limit Exceeded)
  63                 LDAPRequest *refReq=chaseReferral(ret);
  64                 if(refReq != 0){
  65                     m_activeReq.push(refReq);
  66                     m_issuedReq.push_back(refReq);
  67                     delete ret;
  68                     return getNext();
  69                 }
  70             }
  71             return ret;
  72         break;
  73         case LDAPMsg::SEARCH_ENTRY :
  74             return ret;
  75         break;
  76         case LDAPMsg::SEARCH_DONE :
  77             if(req->isReferral()){
  78                 req->unbind();
  79             }
  80             switch ( ((LDAPResult*)ret)->getResultCode()) {
  81                 case LDAPResult::REFERRAL :
  82                     if(constr->getReferralChase()){
  83                         //throws Exception (limit Exceeded)
  84                         LDAPRequest *refReq=chaseReferral(ret);
  85                         if(refReq != 0){
  86                             m_activeReq.pop();
  87                             m_activeReq.push(refReq);
  88                             m_issuedReq.push_back(refReq);
  89                             delete ret;
  90                             return getNext();
  91                         }
  92                     }
  93                     return ret;
  94                 break;
  95                 case LDAPResult::SUCCESS :
  96                     if(req->isReferral()){
  97                         delete ret;
  98                         m_activeReq.pop();
  99                         return getNext();
 100                     }else{
 101                         m_activeReq.pop();
 102                         return ret;
 103                     }
 104                 break;
 105                 default:
 106                     m_activeReq.pop();
 107                     return ret;
 108                 break;
 109             }
 110         break;
 111         //must be some kind of LDAPResultMessage
 112         default:
 113             if(req->isReferral()){
 114                 req->unbind();
 115             }
 116             LDAPResult* res_p=(LDAPResult*)ret;
 117             switch (res_p->getResultCode()) {
 118                 case LDAPResult::REFERRAL :
 119                     if(constr->getReferralChase()){
 120                         //throws Exception (limit Exceeded)
 121                         LDAPRequest *refReq=chaseReferral(ret);
 122                         if(refReq != 0){
 123                             m_activeReq.pop();
 124                             m_activeReq.push(refReq);
 125                             m_issuedReq.push_back(refReq);
 126                             delete ret;
 127                             return getNext();
 128                         }
 129                     }
 130                     return ret;
 131                 break;
 132                 default:
 133                     m_activeReq.pop();
 134                     return ret;
 135             }
 136         break;
 137     }
 138 }
 139
 140 // TODO Maybe moved to LDAPRequest::followReferral seems more reasonable
 141 //there
 142 LDAPRequest* LDAPMessageQueue::chaseReferral(LDAPMsg* ref){
 143     DEBUG(LDAP_DEBUG_TRACE,"LDAPMessageQueue::chaseReferral()" << endl);
 144     LDAPRequest *req=m_activeReq.top();
 145     LDAPRequest *refReq=req->followReferral(ref);
 146     if(refReq !=0){
 147         if(refReq->getConstraints()->getHopLimit() < refReq->getHopCount()){
 148             delete(refReq);
 149             throw LDAPException(LDAP_REFERRAL_LIMIT_EXCEEDED);
 150         }
 151         if(refReq->isCycle()){
 152             delete(refReq);
 153             throw LDAPException(LDAP_CLIENT_LOOP);
 154         }
 155         try {
 156             refReq->sendRequest();
 157             return refReq;
 158         }catch (LDAPException e){
 159             DEBUG(LDAP_DEBUG_TRACE,"   caught exception" << endl);
 160             return 0;
 161         }
 162     }else{
 163         return 0;
 164     }
 165 }
 166
 167 LDAPRequestStack* LDAPMessageQueue::getRequestStack(){
 168     DEBUG(LDAP_DEBUG_TRACE,"LDAPMessageQueue::getRequestStack()" << endl);
 169     return &m_activeReq;
 170 }
 171