SSL comstack support. Separate POSIX thread support library.
[yaz-moved-to-github.git] / server / seshigh.c
index faa1f63..18f604b 100644 (file)
@@ -1,10 +1,75 @@
 /*
- * Copyright (c) 1995-1999, Index Data
+ * Copyright (c) 1995-2000, Index Data
  * See the file LICENSE for details.
- * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: seshigh.c,v $
- * Revision 1.89  1999-05-26 15:24:26  adam
+ * Revision 1.111  2000-11-23 10:58:32  adam
+ * SSL comstack support. Separate POSIX thread support library.
+ *
+ * Revision 1.110  2000/10/02 13:05:32  adam
+ * Fixed bug introduced by previous commit.
+ *
+ * Revision 1.109  2000/10/02 11:07:44  adam
+ * Added peer_name member for bend_init handler. Changed the YAZ
+ * client so that tcp: can be avoided in target spec.
+ *
+ * Revision 1.108  2000/09/04 08:58:15  adam
+ * Added prefix yaz_ for most logging utility functions.
+ *
+ * Revision 1.107  2000/08/31 10:20:12  adam
+ * Added member request_format and output_format for backend fetch method.
+ *
+ * Revision 1.106  2000/08/31 09:51:25  adam
+ * Added record_syntax member for fetch method (raw OID).
+ *
+ * Revision 1.105  2000/07/06 10:38:47  adam
+ * Enhanced option --enable-tcpd.
+ *
+ * Revision 1.104  2000/04/05 07:39:55  adam
+ * Added shared library support (libtool).
+ *
+ * Revision 1.103  2000/03/20 19:06:25  adam
+ * Added Segment request for fronend server. Work on admin for client.
+ *
+ * Revision 1.102  2000/03/15 12:59:49  adam
+ * Added handle member to statserv_control.
+ *
+ * Revision 1.101  2000/01/12 14:36:07  adam
+ * Added printing stream (ODR) for backend functions.
+ *
+ * Revision 1.100  1999/12/16 23:36:19  adam
+ * Implemented ILL protocol. Minor updates ASN.1 compiler.
+ *
+ * Revision 1.99  1999/11/30 13:47:12  adam
+ * Improved installation. Moved header files to include/yaz.
+ *
+ * Revision 1.98  1999/11/29 15:12:27  adam
+ * Changed the way implementationName - and version is set.
+ *
+ * Revision 1.96  1999/11/04 14:58:44  adam
+ * Added status elements for backend delete result set handler.
+ * Updated delete result result set command for client.
+ *
+ * Revision 1.95  1999/10/11 10:01:24  adam
+ * Implemented bend_sort_rr handler for frontend server.
+ *
+ * Revision 1.94  1999/08/27 09:40:32  adam
+ * Renamed logf function to yaz_log. Removed VC++ project files.
+ *
+ * Revision 1.93  1999/07/06 12:17:15  adam
+ * Added option -1 that runs server once (for profiling purposes).
+ *
+ * Revision 1.92  1999/06/17 10:54:45  adam
+ * Added facility to specify implementation version - and name
+ * for server.
+ *
+ * Revision 1.91  1999/06/01 14:29:12  adam
+ * Work on Extended Services.
+ *
+ * Revision 1.90  1999/05/27 13:02:20  adam
+ * Assigned OID for old DB Update (VAL_DBUPDATE0).
+ *
+ * Revision 1.89  1999/05/26 15:24:26  adam
  * Fixed minor bugs regarding DB Update (introduced by previous commit).
  *
  * Revision 1.88  1999/04/20 09:56:48  adam
  *
  */
 
-#include <yconfig.h>
 #include <stdlib.h>
 #include <stdio.h>
 #ifdef WIN32
 #endif
 #include <assert.h>
 
-#include <xmalloc.h>
-#include <comstack.h>
+#include <yaz/yconfig.h>
+#include <yaz/xmalloc.h>
+#include <yaz/comstack.h>
 #include "eventl.h"
 #include "session.h"
-#include <proto.h>
-#include <oid.h>
-#include <log.h>
-#include <logrpn.h>
-#include <statserv.h>
+#include <yaz/proto.h>
+#include <yaz/oid.h>
+#include <yaz/log.h>
+#include <yaz/logrpn.h>
+#include <yaz/statserv.h>
 
-#include <backend.h>
+#include <yaz/backend.h>
 
-static int process_request(association *assoc, request *req);
+static int process_request(association *assoc, request *req, char **msg);
 void backend_response(IOCHAN i, int event);
 static int process_response(association *assoc, request *req, Z_APDU *res);
 static Z_APDU *process_initRequest(association *assoc, request *reqb);
@@ -347,6 +412,7 @@ static void process_close(association *assoc, request *reqb);
 void save_referenceId (request *reqb, Z_ReferenceId *refid);
 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
     int *fd);
+static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 
 static FILE *apduf = 0; /* for use in static mode */
 static statserv_options_block *control_block = 0;
@@ -369,8 +435,12 @@ association *create_association(IOCHAN channel, COMSTACK link)
        control_block = statserv_getcontrol();
     if (!(anew = (association *)xmalloc(sizeof(*anew))))
        return 0;
+    anew->init = 0;
     anew->client_chan = channel;
     anew->client_link = link;
+    anew->cs_get_mask = 0;
+    anew->cs_put_mask = 0;
+    anew->cs_accept_mask = 0;
     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
        !(anew->encode = odr_createmem(ODR_ENCODE)))
        return 0;
@@ -391,7 +461,7 @@ association *create_association(IOCHAN channel, COMSTACK link)
                {
                    if (!(apduf = fopen(filename, "w")))
                    {
-                       logf(LOG_WARN|LOG_ERRNO, "%s", filename);
+                       yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
                        return 0;
                    }
                    setvbuf(apduf, 0, _IONBF, 0);
@@ -403,7 +473,7 @@ association *create_association(IOCHAN channel, COMSTACK link)
                sprintf(filename + strlen(filename), ".%d", getpid());
                if (!(f = fopen(filename, "w")))
                {
-                   logf(LOG_WARN|LOG_ERRNO, "%s", filename);
+                   yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
                    return 0;
                }
                setvbuf(f, 0, _IONBF, 0);
@@ -428,6 +498,9 @@ association *create_association(IOCHAN channel, COMSTACK link)
  */
 void destroy_association(association *h)
 {
+    statserv_options_block *cb = statserv_getcontrol();
+
+    xfree(h->init);
     odr_destroy(h->decode);
     odr_destroy(h->encode);
     if (h->print)
@@ -435,12 +508,14 @@ void destroy_association(association *h)
     if (h->input_buffer)
     xfree(h->input_buffer);
     if (h->backend)
-       bend_close(h->backend);
+       (*cb->bend_close)(h->backend);
     while (request_deq(&h->incoming));
     while (request_deq(&h->outgoing));
     request_delq(&h->incoming);
     request_delq(&h->outgoing);
     xfree(h);
+    if (control_block && control_block->one_shot)
+       exit (0);
 }
 
 static void do_close_req(association *a, int reason, char *message,
@@ -454,7 +529,7 @@ static void do_close_req(association *a, int reason, char *message,
     while (request_deq(&a->outgoing));
     if (a->version >= 3)
     {
-       logf(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
+       yaz_log(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
            reason, message ? message : "none");
        apdu.which = Z_APDU_close;
        apdu.u.close = cls;
@@ -465,7 +540,7 @@ static void do_close_req(association *a, int reason, char *message,
     }
     else
     {
-       logf(LOG_DEBUG, "v2 client. No Close PDU");
+       yaz_log(LOG_DEBUG, "v2 client. No Close PDU");
        iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
     }
     a->state = ASSOC_DEAD;
@@ -497,66 +572,97 @@ void ir_session(IOCHAN h, int event)
     {
        if (assoc->state != ASSOC_UP)
        {
-           logf(LOG_LOG, "Final timeout - closing connection.");
+           yaz_log(LOG_LOG, "Final timeout - closing connection.");
            cs_close(conn);
            destroy_association(assoc);
            iochan_destroy(h);
        }
        else
        {
-           logf(LOG_LOG, "Session idle too long. Sending close.");
+           yaz_log(LOG_LOG, "Session idle too long. Sending close.");
            do_close(assoc, Z_Close_lackOfActivity, 0);
        }
        return;
     }
-    if (event & EVENT_INPUT || event & EVENT_WORK) /* input */
+    if (event & assoc->cs_accept_mask)
     {
-       if (event & EVENT_INPUT)
+       yaz_log (LOG_DEBUG, "ir_session (accept)");
+       if (!cs_accept (conn))
        {
-           logf(LOG_DEBUG, "ir_session (input)");
-           assert(assoc && conn);
+           yaz_log (LOG_LOG, "accept failed");
+           destroy_association(assoc);
+           iochan_destroy(h);
+       }
+       iochan_clearflag (h, EVENT_OUTPUT|EVENT_OUTPUT);
+       if (conn->io_pending) 
+       {   /* cs_accept didn't complete */
+           assoc->cs_accept_mask = 
+               ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
+               ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
+
+           iochan_setflag (h, assoc->cs_accept_mask);
+       }
+       else
+       {   /* cs_accept completed. Prepare for reading (cs_get) */
+           assoc->cs_accept_mask = 0;
+           assoc->cs_get_mask = EVENT_INPUT;
+           iochan_setflag (h, assoc->cs_get_mask);
+       }
+       return;
+    }
+    if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
+    {
+       if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
+       {
+           yaz_log(LOG_DEBUG, "ir_session (input)");
            /* We aren't speaking to this fellow */
            if (assoc->state == ASSOC_DEAD)
            {
-               logf(LOG_LOG, "Closed connection after reject");
+               yaz_log(LOG_LOG, "Closed connection after reject");
                cs_close(conn);
                destroy_association(assoc);
                iochan_destroy(h);
                return;
            }
+           assoc->cs_get_mask = EVENT_INPUT;
            if ((res = cs_get(conn, &assoc->input_buffer,
                &assoc->input_buffer_len)) <= 0)
            {
-               logf(LOG_LOG, "Connection closed by client");
+               yaz_log(LOG_LOG, "Connection closed by client");
                cs_close(conn);
                destroy_association(assoc);
                iochan_destroy(h);
                return;
            }
            else if (res == 1) /* incomplete read - wait for more  */
+           {
+               if (conn->io_pending & CS_WANT_WRITE)
+                   assoc->cs_get_mask |= EVENT_OUTPUT;
+               iochan_setflag(h, assoc->cs_get_mask);
                return;
+           }
            if (cs_more(conn)) /* more stuff - call us again later, please */
                iochan_setevent(h, EVENT_INPUT);
                
            /* we got a complete PDU. Let's decode it */
-           logf(LOG_DEBUG, "Got PDU, %d bytes", res);
+           yaz_log(LOG_DEBUG, "Got PDU, %d bytes", res);
            req = request_get(&assoc->incoming); /* get a new request structure */
            odr_reset(assoc->decode);
            odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
            if (!z_APDU(assoc->decode, &req->request, 0, 0))
            {
-               logf(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
+               yaz_log(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
                    odr_errmsg(odr_geterror(assoc->decode)),
                    odr_offset(assoc->decode));
-               logf(LOG_LOG, "PDU dump:");
-               odr_dumpBER(log_file(), assoc->input_buffer, res);
+               yaz_log(LOG_LOG, "PDU dump:");
+               odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
                do_close(assoc, Z_Close_protocolError, "Malformed package");
                return;
            }
            req->request_mem = odr_extract_mem(assoc->decode);
            if (assoc->print && !z_APDU(assoc->print, &req->request, 0, 0))
            {
-               logf(LOG_WARN, "ODR print error: %s", 
+               yaz_log(LOG_WARN, "ODR print error: %s", 
                    odr_errmsg(odr_geterror(assoc->print)));
                odr_reset(assoc->print);
            }
@@ -567,40 +673,49 @@ void ir_session(IOCHAN h, int event)
        req = request_head(&assoc->incoming);
        if (req->state == REQUEST_IDLE)
        {
+           char *msg;
            request_deq(&assoc->incoming);
-           if (process_request(assoc, req) < 0)
-               do_close_req(assoc, Z_Close_systemProblem, "Unknown error",
-                            req);
+           if (process_request(assoc, req, &msg) < 0)
+               do_close_req(assoc, Z_Close_systemProblem, msg, req);
        }
     }
-    if (event & EVENT_OUTPUT)
+    if (event & assoc->cs_put_mask)
     {
        request *req = request_head(&assoc->outgoing);
 
-       logf(LOG_DEBUG, "ir_session (output)");
+       assoc->cs_put_mask = 0;
+       yaz_log(LOG_DEBUG, "ir_session (output)");
        req->state = REQUEST_PENDING;
        switch (res = cs_put(conn, req->response, req->len_response))
        {
-           case -1:
-               logf(LOG_LOG, "Connection closed by client");
-               cs_close(conn);
-               destroy_association(assoc);
-               iochan_destroy(h);
-               break;
-           case 0: /* all sent - release the request structure */
-               logf(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
-               nmem_destroy(req->request_mem);
-               request_deq(&assoc->outgoing);
-               request_release(req);
-               if (!request_head(&assoc->outgoing))
-                   iochan_clearflag(h, EVENT_OUTPUT);
-               break;
-           /* value of 1 -- partial send -- is simply ignored */
+       case -1:
+           yaz_log(LOG_LOG, "Connection closed by client");
+           cs_close(conn);
+           destroy_association(assoc);
+           iochan_destroy(h);
+           break;
+       case 0: /* all sent - release the request structure */
+           yaz_log(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
+           nmem_destroy(req->request_mem);
+           request_deq(&assoc->outgoing);
+           request_release(req);
+           if (!request_head(&assoc->outgoing))
+           {   /* restore mask for cs_get operation ... */
+               iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
+               iochan_setflag(h, assoc->cs_get_mask);
+           }
+           break;
+       default:
+           if (conn->io_pending & CS_WANT_WRITE)
+               assoc->cs_put_mask |= EVENT_OUTPUT;
+           if (conn->io_pending & CS_WANT_READ)
+               assoc->cs_put_mask |= EVENT_INPUT;
+           iochan_setflag(h, assoc->cs_put_mask);
        }
     }
     if (event & EVENT_EXCEPT)
     {
-       logf(LOG_DEBUG, "ir_session (exception)");
+       yaz_log(LOG_LOG, "ir_session (exception)");
        cs_close(conn);
        destroy_association(assoc);
        iochan_destroy(h);
@@ -610,64 +725,89 @@ void ir_session(IOCHAN h, int event)
 /*
  * Initiate request processing.
  */
-static int process_request(association *assoc, request *req)
+static int process_request(association *assoc, request *req, char **msg)
 {
     int fd = -1;
     Z_APDU *res;
     int retval;
-
+    
+    *msg = "Unknown Error";
     assert(req && req->state == REQUEST_IDLE);
+    if (req->request->which != Z_APDU_initRequest && !assoc->init)
+    {
+       *msg = "Missing InitRequest";
+       return -1;
+    }
     switch (req->request->which)
     {
-       case Z_APDU_initRequest:
-           res = process_initRequest(assoc, req); break;
-       case Z_APDU_searchRequest:
-           res = process_searchRequest(assoc, req, &fd); break;
-       case Z_APDU_presentRequest:
-           res = process_presentRequest(assoc, req, &fd); break;
-       case Z_APDU_scanRequest:
-           res = process_scanRequest(assoc, req, &fd); break;
-        case Z_APDU_extendedServicesRequest:
-           if (assoc->bend_esrequest)
-               res = process_ESRequest(assoc, req, &fd);
-           else
-           {
-               logf(LOG_WARN, "Cannot handle EXTENDED SERVICES APDU");
-               return -1;
-           }
-           break;
-        case Z_APDU_sortRequest:
-           if (assoc->bend_sort)
-               res = process_sortRequest(assoc, req, &fd);
-           else
-           {
-               logf(LOG_WARN, "Cannot handle SORT APDU");
-               return -1;
-           }
-           break;
-       case Z_APDU_close:
-           process_close(assoc, req); return 0;
-        case Z_APDU_deleteResultSetRequest:
-           if (assoc->bend_delete)
-               res = process_deleteRequest(assoc, req, &fd);
-           else
-           {
-               logf (LOG_WARN, "Cannot handle Delete APDU");
-               return -1;
-           }
-           break;
-       default:
-           logf(LOG_WARN, "Bad APDU received");
+    case Z_APDU_initRequest:
+       res = process_initRequest(assoc, req); break;
+    case Z_APDU_searchRequest:
+       res = process_searchRequest(assoc, req, &fd); break;
+    case Z_APDU_presentRequest:
+       res = process_presentRequest(assoc, req, &fd); break;
+    case Z_APDU_scanRequest:
+       if (assoc->init->bend_scan)
+           res = process_scanRequest(assoc, req, &fd);
+       else
+       {
+           *msg = "Cannot handle Scan APDU";
+           return -1;
+       }
+       break;
+    case Z_APDU_extendedServicesRequest:
+       if (assoc->init->bend_esrequest)
+           res = process_ESRequest(assoc, req, &fd);
+       else
+       {
+           *msg = "Cannot handle Extended Services APDU";
+           return -1;
+       }
+       break;
+    case Z_APDU_sortRequest:
+       if (assoc->init->bend_sort)
+           res = process_sortRequest(assoc, req, &fd);
+       else
+       {
+           *msg = "Cannot handle Sort APDU";
+           return -1;
+       }
+       break;
+    case Z_APDU_close:
+       process_close(assoc, req);
+       return 0;
+    case Z_APDU_deleteResultSetRequest:
+       if (assoc->init->bend_delete)
+           res = process_deleteRequest(assoc, req, &fd);
+       else
+       {
+           *msg = "Cannot handle Delete APDU";
            return -1;
+       }
+       break;
+    case Z_APDU_segmentRequest:
+       if (assoc->init->bend_segment)
+       {
+           res = process_segmentRequest (assoc, req);
+       }
+       else
+       {
+           *msg = "Cannot handle Segment APDU";
+           return -1;
+       }
+       break;
+    default:
+       *msg = "Bad APDU received";
+       return -1;
     }
     if (res)
     {
-       logf(LOG_DEBUG, "  result immediately available");
+       yaz_log(LOG_DEBUG, "  result immediately available");
        retval = process_response(assoc, req, res);
     }
     else if (fd < 0)
     {
-       logf(LOG_DEBUG, "  result unavailble");
+       yaz_log(LOG_DEBUG, "  result unavailble");
        retval = 0;
     }
     else /* no result yet - one will be provided later */
@@ -676,7 +816,7 @@ static int process_request(association *assoc, request *req)
 
        /* Set up an I/O handler for the fd supplied by the backend */
 
-       logf(LOG_DEBUG, "   establishing handler for result");
+       yaz_log(LOG_DEBUG, "   establishing handler for result");
        req->state = REQUEST_PENDING;
        if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
            abort();
@@ -696,7 +836,7 @@ void backend_response(IOCHAN i, int event)
     Z_APDU *res;
     int fd;
 
-    logf(LOG_DEBUG, "backend_response");
+    yaz_log(LOG_DEBUG, "backend_response");
     assert(assoc && req && req->state != REQUEST_IDLE);
     /* determine what it is we're waiting for */
     switch (req->request->which)
@@ -710,19 +850,19 @@ void backend_response(IOCHAN i, int event)
            res = response_scanRequest(assoc, req, 0, &fd); break;
 #endif
        default:
-           logf(LOG_WARN, "Serious programmer's lapse or bug");
+           yaz_log(LOG_WARN, "Serious programmer's lapse or bug");
            abort();
     }
     if ((res && process_response(assoc, req, res) < 0) || fd < 0)
     {
-       logf(LOG_LOG, "Fatal error when talking to backend");
+       yaz_log(LOG_LOG, "Fatal error when talking to backend");
        do_close(assoc, Z_Close_systemProblem, 0);
        iochan_destroy(i);
        return;
     }
     else if (!res) /* no result yet - try again later */
     {
-       logf(LOG_DEBUG, "   no result yet");
+       yaz_log(LOG_DEBUG, "   no result yet");
        iochan_setfd(i, fd); /* in case fd has changed */
     }
 }
@@ -735,7 +875,7 @@ static int process_response(association *assoc, request *req, Z_APDU *res)
     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
     if (!z_APDU(assoc->encode, &res, 0, 0))
     {
-       logf(LOG_WARN, "ODR error when encoding response: %s",
+       yaz_log(LOG_WARN, "ODR error when encoding response: %s",
            odr_errmsg(odr_geterror(assoc->decode)));
        odr_reset(assoc->encode);
        return -1;
@@ -745,7 +885,7 @@ static int process_response(association *assoc, request *req, Z_APDU *res)
     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
     if (assoc->print && !z_APDU(assoc->print, &res, 0, 0))
     {
-       logf(LOG_WARN, "ODR print error: %s", 
+       yaz_log(LOG_WARN, "ODR print error: %s", 
            odr_errmsg(odr_geterror(assoc->print)));
        odr_reset(assoc->print);
     }
@@ -754,11 +894,12 @@ static int process_response(association *assoc, request *req, Z_APDU *res)
     request_enq(&assoc->outgoing, req);
     /* turn the work over to the ir_session handler */
     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
+    assoc->cs_put_mask = EVENT_OUTPUT;
     /* Is there more work to be done? give that to the input handler too */
 #if 1
     if (request_head(&assoc->incoming))
     {
-       logf (LOG_DEBUG, "more work to be done");
+       yaz_log (LOG_DEBUG, "more work to be done");
        iochan_setevent(assoc->client_chan, EVENT_WORK);
     }
 #endif
@@ -774,47 +915,62 @@ static int process_response(association *assoc, request *req, Z_APDU *res)
  */
 static Z_APDU *process_initRequest(association *assoc, request *reqb)
 {
+    statserv_options_block *cb = statserv_getcontrol();
     Z_InitRequest *req = reqb->request->u.initRequest;
     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
     Z_InitResponse *resp = apdu->u.initResponse;
-    bend_initrequest binitreq;
     bend_initresult *binitres;
     char options[100];
 
-    logf(LOG_LOG, "Got initRequest");
+    xfree (assoc->init);
+    assoc->init = xmalloc (sizeof(*assoc->init));
+
+    yaz_log(LOG_LOG, "Got initRequest");
     if (req->implementationId)
-       logf(LOG_LOG, "Id:        %s", req->implementationId);
+       yaz_log(LOG_LOG, "Id:        %s", req->implementationId);
     if (req->implementationName)
-       logf(LOG_LOG, "Name:      %s", req->implementationName);
+       yaz_log(LOG_LOG, "Name:      %s", req->implementationName);
     if (req->implementationVersion)
-       logf(LOG_LOG, "Version:   %s", req->implementationVersion);
-
-    binitreq.stream = assoc->encode;
-    binitreq.configname = "default-config";
-    binitreq.auth = req->idAuthentication;
-    binitreq.referenceId = req->referenceId;
-    binitreq.bend_sort = NULL;
-    binitreq.bend_search = NULL;
-    binitreq.bend_present = NULL;
-    binitreq.bend_esrequest = NULL;
-    binitreq.bend_delete = NULL;
-    if (!(binitres = bend_init(&binitreq)))
+       yaz_log(LOG_LOG, "Version:   %s", req->implementationVersion);
+
+    assoc->init->stream = assoc->encode;
+    assoc->init->print = assoc->print;
+    assoc->init->auth = req->idAuthentication;
+    assoc->init->referenceId = req->referenceId;
+    assoc->init->implementation_version = 0;
+    assoc->init->implementation_name = 0;
+    assoc->init->bend_sort = NULL;
+    assoc->init->bend_search = NULL;
+    assoc->init->bend_present = NULL;
+    assoc->init->bend_esrequest = NULL;
+    assoc->init->bend_delete = NULL;
+    assoc->init->bend_scan = NULL;
+    assoc->init->bend_segment = NULL;
+    assoc->init->bend_fetch = NULL;
+    
+    assoc->init->peer_name =
+       odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
+    if (!(binitres = (*cb->bend_init)(assoc->init)))
     {
-       logf(LOG_WARN, "Bad response from backend.");
+       yaz_log(LOG_WARN, "Bad response from backend.");
        return 0;
     }
 
     assoc->backend = binitres->handle;
-    if ((assoc->bend_sort = (int (*)())binitreq.bend_sort))
-       logf (LOG_DEBUG, "Sort handler installed");
-    if ((assoc->bend_search = (int (*)())binitreq.bend_search))
-       logf (LOG_DEBUG, "Search handler installed");
-    if ((assoc->bend_present = (int (*)())binitreq.bend_present))
-       logf (LOG_DEBUG, "Present handler installed");   
-    if ((assoc->bend_esrequest = (int (*)())binitreq.bend_esrequest))
-       logf (LOG_DEBUG, "ESRequest handler installed");   
-    if ((assoc->bend_delete = (int (*)())binitreq.bend_delete))
-       logf (LOG_DEBUG, "Delete handler installed");   
+    if ((assoc->init->bend_sort))
+       yaz_log (LOG_DEBUG, "Sort handler installed");
+    if ((assoc->init->bend_search))
+       yaz_log (LOG_DEBUG, "Search handler installed");
+    if ((assoc->init->bend_present))
+       yaz_log (LOG_DEBUG, "Present handler installed");   
+    if ((assoc->init->bend_esrequest))
+       yaz_log (LOG_DEBUG, "ESRequest handler installed");   
+    if ((assoc->init->bend_delete))
+       yaz_log (LOG_DEBUG, "Delete handler installed");   
+    if ((assoc->init->bend_scan))
+       yaz_log (LOG_DEBUG, "Scan handler installed");   
+    if ((assoc->init->bend_segment))
+       yaz_log (LOG_DEBUG, "Segment handler installed");   
     
     resp->referenceId = req->referenceId;
     *options = '\0';
@@ -829,13 +985,14 @@ static Z_APDU *process_initRequest(association *assoc, request *reqb)
        ODR_MASK_SET(resp->options, Z_Options_present);
        strcat(options, " prst");
     }
-    if (ODR_MASK_GET(req->options, Z_Options_delSet) && binitreq.bend_delete)
+    if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
+       assoc->init->bend_delete)
     {
        ODR_MASK_SET(resp->options, Z_Options_delSet);
        strcat(options, " del");
     }
     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
-       binitreq.bend_esrequest)
+       assoc->init->bend_esrequest)
     {
        ODR_MASK_SET(resp->options, Z_Options_extendedServices);
        strcat (options, " extendedServices");
@@ -845,7 +1002,7 @@ static Z_APDU *process_initRequest(association *assoc, request *reqb)
        ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
        strcat(options, " namedresults");
     }
-    if (ODR_MASK_GET(req->options, Z_Options_scan))
+    if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
     {
        ODR_MASK_SET(resp->options, Z_Options_scan);
        strcat(options, " scan");
@@ -855,7 +1012,7 @@ static Z_APDU *process_initRequest(association *assoc, request *reqb)
        ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
        strcat(options, " concurop");
     }
-    if (ODR_MASK_GET(req->options, Z_Options_sort) && binitreq.bend_sort)
+    if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
     {
        ODR_MASK_SET(resp->options, Z_Options_sort);
        strcat(options, " sort");
@@ -875,19 +1032,49 @@ static Z_APDU *process_initRequest(association *assoc, request *reqb)
        ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
        assoc->version = 3;
     }
-    logf(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
+    yaz_log(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
     assoc->maximumRecordSize = *req->maximumRecordSize;
     if (assoc->maximumRecordSize > control_block->maxrecordsize)
        assoc->maximumRecordSize = control_block->maxrecordsize;
     assoc->preferredMessageSize = *req->preferredMessageSize;
     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
        assoc->preferredMessageSize = assoc->maximumRecordSize;
+
+#if 0
+    assoc->maximumRecordSize = 3000000;
+    assoc->preferredMessageSize = 3000000;
+#endif
+
     resp->preferredMessageSize = &assoc->preferredMessageSize;
     resp->maximumRecordSize = &assoc->maximumRecordSize;
-    resp->implementationName = "Index Data/YAZ Generic Frontend Server";
+
+    resp->implementationName = "GFS";
+
+    if (assoc->init->implementation_name)
+    {
+       char *nv = (char *)
+           odr_malloc (assoc->encode,
+                       strlen(assoc->init->implementation_name) + 10 + 
+                              strlen(resp->implementationName));
+       sprintf (nv, "%s / %s",
+                resp->implementationName, assoc->init->implementation_name);
+        resp->implementationName = nv;
+    }
+    if (assoc->init->implementation_version)
+    {
+       char *nv = (char *)
+           odr_malloc (assoc->encode,
+                       strlen(assoc->init->implementation_version) + 10 + 
+                              strlen(resp->implementationVersion));
+       sprintf (nv, "YAZ %s / %s",
+                resp->implementationVersion,
+                assoc->init->implementation_version);
+        resp->implementationVersion = nv;
+    }
+
     if (binitres->errcode)
     {
-       logf(LOG_LOG, "Connection rejected by backend.");
+       yaz_log(LOG_LOG, "Connection rejected by backend.");
        *resp->result = 0;
        assoc->state = ASSOC_DEAD;
     }
@@ -931,7 +1118,7 @@ static Z_Records *diagrec(association *assoc, int error, char *addinfo)
     bib1.oclass = CLASS_DIAGSET;
     bib1.value = VAL_BIB1;
 
-    logf(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
+    yaz_log(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
        "NULL");
     *err = error;
     rec->which = Z_Records_NSD;
@@ -968,7 +1155,7 @@ static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
     bib1.oclass = CLASS_DIAGSET;
     bib1.value = VAL_BIB1;
 
-    logf(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
+    yaz_log(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
     *err = error;
     rec->databaseName = dbname;
     rec->which = Z_NamePlusRecord_surrogateDiagnostic;
@@ -996,7 +1183,7 @@ static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
     Z_DefaultDiagFormat *rec = (Z_DefaultDiagFormat *)odr_malloc (assoc->encode, sizeof(*rec));
 
-    logf(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : "");
+    yaz_log(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : "");
     bib1.proto = assoc->proto;
     bib1.oclass = CLASS_DIAGSET;
     bib1.value = VAL_BIB1;
@@ -1023,11 +1210,11 @@ static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
 }
 
 static Z_Records *pack_records(association *a, char *setname, int start,
-                               int *num, Z_RecordComposition *comp,
-                               int *next, int *pres, oid_value format,
-                               Z_ReferenceId *referenceId)
+                              int *num, Z_RecordComposition *comp,
+                              int *next, int *pres, oid_value format,
+                              Z_ReferenceId *referenceId,
+                              int *oid)
 {
-    int oid[OID_SIZE];
     int recno, total_length = 0, toget = *num, dumped_records = 0;
     Z_Records *records =
        (Z_Records *) odr_malloc (a->encode, sizeof(*records));
@@ -1035,7 +1222,6 @@ static Z_Records *pack_records(association *a, char *setname, int start,
        (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
     Z_NamePlusRecord **list =
        (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
-    oident recform;
 
     records->which = Z_Records_DBOSD;
     records->u.databaseOrSurDiagnostics = reclist;
@@ -1045,88 +1231,92 @@ static Z_Records *pack_records(association *a, char *setname, int start,
     *num = 0;
     *next = 0;
 
-    logf(LOG_LOG, "Request to pack %d+%d", start, toget);
-    logf(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
+    yaz_log(LOG_LOG, "Request to pack %d+%d", start, toget);
+    yaz_log(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
        a->maximumRecordSize);
     for (recno = start; reclist->num_records < toget; recno++)
     {
-       bend_fetchrequest freq;
-       bend_fetchresult *fres;
+       bend_fetch_rr freq;
        Z_NamePlusRecord *thisrec;
-       Z_DatabaseRecord *thisext;
        int this_length = 0;
-
        /*
         * we get the number of bytes allocated on the stream before any
         * allocation done by the backend - this should give us a reasonable
         * idea of the total size of the data so far.
         */
        total_length = odr_total(a->encode) - dumped_records;
+       freq.errcode = 0;
+       freq.errstring = 0;
+       freq.basename = 0;
+       freq.len = 0;
+       freq.record = 0;
+       freq.last_in_set = 0;
        freq.setname = setname;
+       freq.surrogate_flag = 0;
        freq.number = recno;
        freq.comp = comp;
-       freq.format = format;
+       freq.request_format = format;
+       freq.request_format_raw = oid;
+       freq.output_format = format;
+       freq.output_format_raw = 0;
        freq.stream = a->encode;
+       freq.print = a->print;
        freq.surrogate_flag = 0;
        freq.referenceId = referenceId;
-       if (!(fres = bend_fetch(a->backend, &freq, 0)))
-       {
-           *pres = Z_PRES_FAILURE;
-           return diagrec(a, 2, "Backend interface problem");
-       }
+       (*a->init->bend_fetch)(a->backend, &freq);
        /* backend should be able to signal whether error is system-wide
           or only pertaining to current record */
-       if (fres->errcode)
+       if (freq.errcode)
        {
            if (!freq.surrogate_flag)
            {
                *pres = Z_PRES_FAILURE;
-               return diagrec(a, fres->errcode, fres->errstring);
+               return diagrec(a, freq.errcode, freq.errstring);
            }
            reclist->records[reclist->num_records] =
-               surrogatediagrec(a, fres->basename, fres->errcode,
-                                fres->errstring);
+               surrogatediagrec(a, freq.basename, freq.errcode,
+                                freq.errstring);
            reclist->num_records++;
-           *next = fres->last_in_set ? 0 : recno + 1;
+           *next = freq.last_in_set ? 0 : recno + 1;
            continue;
        }
-       if (fres->len >= 0)
-           this_length = fres->len;
+       if (freq.len >= 0)
+           this_length = freq.len;
        else
            this_length = odr_total(a->encode) - total_length;
-       logf(LOG_DEBUG, "  fetched record, len=%d, total=%d",
+       yaz_log(LOG_DEBUG, "  fetched record, len=%d, total=%d",
            this_length, total_length);
        if (this_length + total_length > a->preferredMessageSize)
        {
            /* record is small enough, really */
            if (this_length <= a->preferredMessageSize)
            {
-               logf(LOG_DEBUG, "  Dropped last normal-sized record");
+               yaz_log(LOG_DEBUG, "  Dropped last normal-sized record");
                *pres = Z_PRES_PARTIAL_2;
                break;
            }
            /* record can only be fetched by itself */
            if (this_length < a->maximumRecordSize)
            {
-               logf(LOG_DEBUG, "  Record > prefmsgsz");
+               yaz_log(LOG_DEBUG, "  Record > prefmsgsz");
                if (toget > 1)
                {
-                   logf(LOG_DEBUG, "  Dropped it");
+                   yaz_log(LOG_DEBUG, "  Dropped it");
                    reclist->records[reclist->num_records] =
-                        surrogatediagrec(a, fres->basename, 16, 0);
+                        surrogatediagrec(a, freq.basename, 16, 0);
                    reclist->num_records++;
-                   *next = fres->last_in_set ? 0 : recno + 1;
+                   *next = freq.last_in_set ? 0 : recno + 1;
                    dumped_records += this_length;
                    continue;
                }
            }
            else /* too big entirely */
            {
-               logf(LOG_DEBUG, "Record > maxrcdsz");
+               yaz_log(LOG_DEBUG, "Record > maxrcdsz");
                reclist->records[reclist->num_records] =
-                   surrogatediagrec(a, fres->basename, 17, 0);
+                   surrogatediagrec(a, freq.basename, 17, 0);
                reclist->num_records++;
-               *next = fres->last_in_set ? 0 : recno + 1;
+               *next = freq.last_in_set ? 0 : recno + 1;
                dumped_records += this_length;
                continue;
            }
@@ -1136,17 +1326,23 @@ static Z_Records *pack_records(association *a, char *setname, int start,
              odr_malloc(a->encode, sizeof(*thisrec))))
            return 0;
        if (!(thisrec->databaseName = (char *)odr_malloc(a->encode,
-           strlen(fres->basename) + 1)))
+           strlen(freq.basename) + 1)))
            return 0;
-       strcpy(thisrec->databaseName, fres->basename);
+       strcpy(thisrec->databaseName, freq.basename);
        thisrec->which = Z_NamePlusRecord_databaseRecord;
-       thisrec->u.databaseRecord = z_ext_record(a->encode, fres->format,
-                                                fres->record, fres->len);
+
+       if (freq.output_format_raw)
+       {
+           struct oident *ident = oid_getentbyoid(freq.output_format_raw);
+           freq.output_format = ident->value;
+       }
+       thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
+                                                freq.record, freq.len);
        if (!thisrec->u.databaseRecord)
            return 0;
        reclist->records[reclist->num_records] = thisrec;
        reclist->num_records++;
-       *next = fres->last_in_set ? 0 : recno + 1;
+       *next = freq.last_in_set ? 0 : recno + 1;
     }
     *num = reclist->num_records;
     return records;
@@ -1159,26 +1355,26 @@ static Z_APDU *process_searchRequest(association *assoc, request *reqb,
     bend_search_rr *bsrr = 
        (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
     
-    logf(LOG_LOG, "Got SearchRequest.");
+    yaz_log(LOG_LOG, "Got SearchRequest.");
     bsrr->fd = fd;
     bsrr->request = reqb;
     bsrr->association = assoc;
     bsrr->referenceId = req->referenceId;
     save_referenceId (reqb, bsrr->referenceId);
 
-    logf (LOG_LOG, "ResultSet '%s'", req->resultSetName);
+    yaz_log (LOG_LOG, "ResultSet '%s'", req->resultSetName);
     if (req->databaseNames)
     {
        int i;
        for (i = 0; i < req->num_databaseNames; i++)
-           logf (LOG_LOG, "Database '%s'", req->databaseNames[i]);
+           yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
     }
     switch (req->query->which)
     {
     case Z_Query_type_1: case Z_Query_type_101:
        log_rpn_query (req->query->u.type_1);
     }
-    if (assoc->bend_search)
+    if (assoc->init->bend_search)
     {
        bsrr->setname = req->resultSetName;
        bsrr->replace_set = *req->replaceIndicator;
@@ -1187,14 +1383,15 @@ static Z_APDU *process_searchRequest(association *assoc, request *reqb,
        bsrr->query = req->query;
        bsrr->stream = assoc->encode;
        bsrr->decode = assoc->decode;
+       bsrr->print = assoc->print;
        bsrr->errcode = 0;
        bsrr->hits = 0;
        bsrr->errstring = NULL;
-       ((int (*)(void *, bend_search_rr *))(assoc->bend_search))
-           (assoc->backend, bsrr);
+       (assoc->init->bend_search)(assoc->backend, bsrr);
        if (!bsrr->request)
            return 0;
     }
+#if 0
     else
     {
        bend_searchrequest bsrq;
@@ -1208,12 +1405,14 @@ static Z_APDU *process_searchRequest(association *assoc, request *reqb,
         bsrq.referenceId = req->referenceId;
        bsrq.stream = assoc->encode;
        bsrq.decode = assoc->decode;
+       bsrq.print = assoc->print;
        if (!(bsrt = bend_search (assoc->backend, &bsrq, fd)))
            return 0;
        bsrr->hits = bsrt->hits;
        bsrr->errcode = bsrt->errcode;
        bsrr->errstring = bsrt->errstring;
     }
+#endif
     return response_searchRequest(assoc, reqb, bsrr, fd);
 }
 
@@ -1251,7 +1450,7 @@ static Z_APDU *response_searchRequest(association *assoc, request *reqb,
     *fd = -1;
     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
     {
-       logf(LOG_FATAL, "Bad result from backend");
+       yaz_log(LOG_FATAL, "Bad result from backend");
        return 0;
     }
     else if (bsrt->errcode)
@@ -1305,7 +1504,8 @@ static Z_APDU *response_searchRequest(association *assoc, request *reqb,
            else
                form = prefformat->value;
            resp->records = pack_records(assoc, req->resultSetName, 1,
-               toget, compp, next, presst, form, req->referenceId);
+               toget, compp, next, presst, form, req->referenceId,
+                                        req->preferredRecordSyntax);
            if (!resp->records)
                return 0;
            resp->numberOfRecordsReturned = toget;
@@ -1344,7 +1544,7 @@ static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  * speed - which is normally more true for search than for present.
  */
 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
-    int *fd)
+                                     int *fd)
 {
     Z_PresentRequest *req = reqb->request->u.presentRequest;
     oident *prefformat;
@@ -1355,14 +1555,14 @@ static Z_APDU *process_presentRequest(association *assoc, request *reqb,
     int *next;
     int *num;
 
-    logf(LOG_LOG, "Got PresentRequest.");
+    yaz_log(LOG_LOG, "Got PresentRequest.");
 
     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
        prefformat->oclass != CLASS_RECSYN)
        form = VAL_NONE;
     else
        form = prefformat->value;
-    if (assoc->bend_present)
+    if (assoc->init->bend_present)
     {
        bend_present_rr *bprr = (bend_present_rr *)
            nmem_malloc (reqb->request_mem, sizeof(*bprr));
@@ -1373,12 +1573,12 @@ static Z_APDU *process_presentRequest(association *assoc, request *reqb,
        bprr->comp = req->recordComposition;
        bprr->referenceId = req->referenceId;
        bprr->stream = assoc->encode;
+       bprr->print = assoc->print;
        bprr->request = reqb;
        bprr->association = assoc;
        bprr->errcode = 0;
        bprr->errstring = NULL;
-       ((int (*)(void *, bend_present_rr *))(*assoc->bend_present))(
-           assoc->backend, bprr);
+       (*assoc->init->bend_present)(assoc->backend, bprr);
        
        if (!bprr->request)
            return 0;
@@ -1400,7 +1600,7 @@ static Z_APDU *process_presentRequest(association *assoc, request *reqb,
     resp->records =
        pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
                     num, req->recordComposition, next, presst, form,
-                     req->referenceId);
+                     req->referenceId, req->preferredRecordSyntax);
     if (!resp->records)
        return 0;
     resp->numberOfRecordsReturned = num;
@@ -1410,6 +1610,34 @@ static Z_APDU *process_presentRequest(association *assoc, request *reqb,
     return apdu;
 }
 
+#if 0
+static int bend_default_scan (void *handle, bend_scan_rr *rr)
+{
+    bend_scanrequest srq;
+    bend_scanresult *srs;
+
+    srq.num_bases = rr->num_bases;
+    srq.basenames = rr->basenames;
+    srq.attributeset = rr->attributeset;
+    srq.referenceId = rr->referenceId;
+    srq.term = rr->term;
+    srq.term_position = rr->term_position;
+    srq.num_entries = rr->num_entries;
+    srq.stream = rr->stream;
+    srq.print = rr->print;
+    
+    srs = bend_scan(handle, &srq, 0);
+
+    rr->term_position = srs->term_position;
+    rr->num_entries = srs->num_entries;
+    rr->entries = srs->entries;
+    rr->status = srs->status;
+    rr->errcode = srs->errcode;
+    rr->errstring = srs->errstring;
+    return 0;
+}
+#endif
+
 /*
  * Scan was implemented rather in a hurry, and with support for only the basic
  * elements of the service in the backend API. Suggestions are welcome.
@@ -1428,11 +1656,9 @@ static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
        odr_malloc (assoc->encode, sizeof(*ents));
     Z_DiagRecs *diagrecs_p = NULL;
     oident *attent;
-    bend_scanrequest srq;
-    bend_scanresult *srs;
     oident *attset;
 
-    logf(LOG_LOG, "Got ScanRequest");
+    yaz_log(LOG_LOG, "Got ScanRequest");
     *scanStatus = Z_Scan_failure;
     *numberOfEntriesReturned = 0;
 
@@ -1459,52 +1685,55 @@ static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
        diagrecs_p = diagrecs(assoc, 205, 0);
     else
     {
+       bend_scan_rr *bsrr = (bend_scan_rr *)
+           odr_malloc (assoc->encode, sizeof(*bsrr));
        if (req->databaseNames)
        {
            int i;
            for (i = 0; i < req->num_databaseNames; i++)
-               logf (LOG_LOG, "Database '%s'", req->databaseNames[i]);
+               yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
        }
-       srq.num_bases = req->num_databaseNames;
-       srq.basenames = req->databaseNames;
-       srq.num_entries = *req->numberOfTermsRequested;
-       srq.term = req->termListAndStartPoint;
-       srq.referenceId = req->referenceId;
-       srq.stream = assoc->encode;
+       bsrr->num_bases = req->num_databaseNames;
+       bsrr->basenames = req->databaseNames;
+       bsrr->num_entries = *req->numberOfTermsRequested;
+       bsrr->term = req->termListAndStartPoint;
+       bsrr->referenceId = req->referenceId;
+       bsrr->stream = assoc->encode;
+       bsrr->print = assoc->print;
        if (!(attset = oid_getentbyoid(req->attributeSet)) ||
            attset->oclass != CLASS_RECSYN)
-           srq.attributeset = VAL_NONE;
+           bsrr->attributeset = VAL_NONE;
        else
-           srq.attributeset = attset->value;
+           bsrr->attributeset = attset->value;
        log_scan_term (req->termListAndStartPoint, attset->value);
-       srq.term_position = req->preferredPositionInResponse ?
+       bsrr->term_position = req->preferredPositionInResponse ?
            *req->preferredPositionInResponse : 1;
-       if (!(srs = bend_scan(assoc->backend, &srq, 0)))
-           diagrecs_p = diagrecs(assoc, 2, 0);
-       else if (srs->errcode)
-           diagrecs_p = diagrecs(assoc, srs->errcode, srs->errstring);
+       ((int (*)(void *, bend_scan_rr *))
+        (*assoc->init->bend_scan))(assoc->backend, bsrr);
+       if (bsrr->errcode)
+           diagrecs_p = diagrecs(assoc, bsrr->errcode, bsrr->errstring);
        else
        {
            int i;
             Z_Entry **tab = (Z_Entry **)
-               odr_malloc (assoc->encode, sizeof(*tab) * srs->num_entries);
+               odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
            
-           if (srs->status == BEND_SCAN_PARTIAL)
+           if (bsrr->status == BEND_SCAN_PARTIAL)
                *scanStatus = Z_Scan_partial_5;
            else
                *scanStatus = Z_Scan_success;
            ents->entries = tab;
-           ents->num_entries = srs->num_entries;
+           ents->num_entries = bsrr->num_entries;
            res->numberOfEntriesReturned = &ents->num_entries;      
-           res->positionOfTerm = &srs->term_position;
-           for (i = 0; i < srs->num_entries; i++)
+           res->positionOfTerm = &bsrr->term_position;
+           for (i = 0; i < bsrr->num_entries; i++)
            {
                Z_Entry *e;
                Z_TermInfo *t;
                Odr_oct *o;
                
                tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
-               if (srs->entries[i].occurrences >= 0)
+               if (bsrr->entries[i].occurrences >= 0)
                {
                    e->which = Z_Entry_termInfo;
                    e->u.termInfo = t = (Z_TermInfo *)
@@ -1514,7 +1743,7 @@ static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
                    t->alternativeTerm = 0;
                    t->byAttributes = 0;
                    t->otherTermInfo = 0;
-                   t->globalOccurrences = &srs->entries[i].occurrences;
+                   t->globalOccurrences = &bsrr->entries[i].occurrences;
                    t->term = (Z_Term *)
                        odr_malloc(assoc->encode, sizeof(*t->term));
                    t->term->which = Z_Term_general;
@@ -1522,16 +1751,16 @@ static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
                        (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
                    o->buf = (unsigned char *)
                        odr_malloc(assoc->encode, o->len = o->size =
-                                  strlen(srs->entries[i].term));
-                   memcpy(o->buf, srs->entries[i].term, o->len);
-                   logf(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
-                        srs->entries[i].term, srs->entries[i].occurrences);
+                                  strlen(bsrr->entries[i].term));
+                   memcpy(o->buf, bsrr->entries[i].term, o->len);
+                   yaz_log(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
+                        bsrr->entries[i].term, bsrr->entries[i].occurrences);
                }
                else
                {
                    Z_DiagRecs *drecs = diagrecs (assoc,
-                                                 srs->entries[i].errcode,
-                                                 srs->entries[i].errstring);
+                                                 bsrr->entries[i].errcode,
+                                                 bsrr->entries[i].errstring);
                    assert (drecs->num_diagRecs == 1);
                    e->which = Z_Entry_surrogateDiagnostic;
                    assert (drecs->diagRecs[0]);
@@ -1559,7 +1788,7 @@ static Z_APDU *process_sortRequest(association *assoc, request *reqb,
 
     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
 
-    logf(LOG_LOG, "Got SortRequest.");
+    yaz_log(LOG_LOG, "Got SortRequest.");
 
 #ifdef ASN_COMPILED
     bsrr->num_input_setnames = req->num_inputResultSetNames;
@@ -1572,13 +1801,13 @@ static Z_APDU *process_sortRequest(association *assoc, request *reqb,
     bsrr->output_setname = req->sortedResultSetName;
     bsrr->sort_sequence = req->sortSequence;
     bsrr->stream = assoc->encode;
+    bsrr->print = assoc->print;
 
     bsrr->sort_status = Z_SortStatus_failure;
     bsrr->errcode = 0;
     bsrr->errstring = 0;
     
-    ((int (*)(void *, bend_sort_rr *))(*assoc->bend_sort))(assoc->backend,
-                                                          bsrr);
+    (*assoc->init->bend_sort)(assoc->backend, bsrr);
     
     res->referenceId = bsrr->referenceId;
     res->sortStatus = (int *)
@@ -1619,16 +1848,24 @@ static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
        odr_malloc (assoc->encode, sizeof(*bdrr));
     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
 
-    logf(LOG_LOG, "Got DeleteRequest.");
+    yaz_log(LOG_LOG, "Got DeleteRequest.");
 
     bdrr->num_setnames = req->num_resultSetList;
     bdrr->setnames = req->resultSetList;
     bdrr->stream = assoc->encode;
+    bdrr->print = assoc->print;
     bdrr->function = *req->deleteFunction;
     bdrr->referenceId = req->referenceId;
-
-    ((int (*)(void *, bend_delete_rr *))
-     (*assoc->bend_delete))(assoc->backend, bdrr);
+    bdrr->statuses = 0;
+    if (bdrr->num_setnames > 0)
+    {
+       int i;
+       bdrr->statuses = odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
+                                   bdrr->num_setnames);
+       for (i = 0; i < bdrr->num_setnames; i++)
+           bdrr->statuses[i] = 0;
+    }
+    (*assoc->init->bend_delete)(assoc->backend, bdrr);
     
     res->referenceId = req->referenceId;
 
@@ -1637,6 +1874,27 @@ static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
     *res->deleteOperationStatus = bdrr->delete_status;
 
     res->deleteListStatuses = 0;
+    if (bdrr->num_setnames > 0)
+    {
+       int i;
+       res->deleteListStatuses = odr_malloc(assoc->encode,
+                                            sizeof(*res->deleteListStatuses));
+       res->deleteListStatuses->num = bdrr->num_setnames;
+       res->deleteListStatuses->elements =
+           odr_malloc (assoc->encode,
+                       sizeof(*res->deleteListStatuses->elements) *
+                       bdrr->num_setnames);
+       for (i = 0; i<bdrr->num_setnames; i++)
+       {
+           res->deleteListStatuses->elements[i] =
+               odr_malloc (assoc->encode,
+                           sizeof(**res->deleteListStatuses->elements));
+           res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
+           res->deleteListStatuses->elements[i]->id =
+               odr_strdup (assoc->encode, bdrr->setnames[i]);
+           
+       }
+    }
     res->numberNotDeleted = 0;
     res->bulkStatuses = 0;
     res->deleteMessage = 0;
@@ -1664,7 +1922,7 @@ static void process_close(association *assoc, request *reqb)
        "unspecified"
     };
 
-    logf(LOG_LOG, "Got Close, reason %s, message %s",
+    yaz_log(LOG_LOG, "Got Close, reason %s, message %s",
        reasons[*req->closeReason], req->diagnosticInformation ?
        req->diagnosticInformation : "NULL");
     if (assoc->version < 3) /* to make do_force respond with close */
@@ -1721,7 +1979,12 @@ void bend_request_destroy (bend_request *req)
 
 int bend_backend_respond (bend_association a, bend_request req)
 {
-    return process_request (a, req);
+    char *msg;
+    int r;
+    r = process_request (a, req, &msg);
+    if (r < 0)
+       logf (LOG_WARN, "%s", msg);
+    return r;
 }
 
 void bend_request_setdata(bend_request r, void *p)
@@ -1734,6 +1997,21 @@ void *bend_request_getdata(bend_request r)
     return r->clientData;
 }
 
+static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
+{
+    bend_segment_rr request;
+
+    request.segment = reqb->request->u.segmentRequest;
+    request.stream = assoc->encode;
+    request.decode = assoc->decode;
+    request.print = assoc->print;
+    request.association = assoc;
+    
+    (*assoc->init->bend_segment)(assoc->backend, &request);
+
+    return 0;
+}
+
 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
 {
     bend_esrequest_rr esrequest;
@@ -1743,18 +2021,19 @@ static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
 
     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
 
-    logf(LOG_DEBUG,"inside Process esRequest");
+    yaz_log(LOG_DEBUG,"inside Process esRequest");
 
     esrequest.esr = reqb->request->u.extendedServicesRequest;
     esrequest.stream = assoc->encode;
+    esrequest.decode = assoc->decode;
+    esrequest.print = assoc->print;
     esrequest.errcode = 0;
     esrequest.errstring = NULL;
     esrequest.request = reqb;
     esrequest.association = assoc;
     esrequest.referenceId = req->referenceId;
     
-    ((int (*)(void *, bend_esrequest_rr *))(*assoc->bend_esrequest))
-       (assoc->backend, &esrequest);
+    (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
     
     /* If the response is being delayed, return NULL */
     if (esrequest.request == NULL)
@@ -1762,21 +2041,31 @@ static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
 
     resp->referenceId = req->referenceId;
 
-    if ( esrequest.errcode == 0 )
+    if (esrequest.errcode == -1)
     {
         /* Backend service indicates request will be processed */
-        logf(LOG_DEBUG,"Request will be processed...Good !");
+        yaz_log(LOG_DEBUG,"Request could be processed...Accepted !");
+        *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
+    }
+    else if (esrequest.errcode == 0)
+    {
+        /* Backend service indicates request will be processed */
+        yaz_log(LOG_DEBUG,"Request could be processed...Done !");
         *resp->operationStatus = Z_ExtendedServicesResponse_done;
     }
     else
     {
+       Z_DiagRecs *diagRecs = diagrecs (assoc, esrequest.errcode,
+                                        esrequest.errstring);
+
         /* Backend indicates error, request will not be processed */
-        logf(LOG_DEBUG,"Request will not be processed...BAD !");
+        yaz_log(LOG_DEBUG,"Request could not be processed...failure !");
         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
+       resp->num_diagnostics = diagRecs->num_diagRecs;
+       resp->diagnostics = diagRecs->diagRecs;
     }
     /* Do something with the members of bend_extendedservice */
 
-    logf(LOG_DEBUG,"Send the result apdu");
-
+    yaz_log(LOG_DEBUG,"Send the result apdu");
     return apdu;
 }