Fixed possible buf in proto.c
[yaz-moved-to-github.git] / server / seshigh.c
index 42a90d8..2007f3e 100644 (file)
@@ -4,76 +4,86 @@
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: seshigh.c,v $
- * Revision 1.6  1995-03-21 12:30:09  quinn
- * Beginning to add support for record packing.
+ * Revision 1.17  1995-04-10 10:23:36  quinn
+ * Some work to add scan and other things.
  *
- * Revision 1.5  1995/03/17  10:44:13  quinn
- * Added catch of null-string in makediagrec
+ * Revision 1.16  1995/03/31  09:18:55  quinn
+ * Added logging.
  *
- * Revision 1.4  1995/03/17  10:18:08  quinn
- * Added memory management.
+ * Revision 1.15  1995/03/30  14:03:23  quinn
+ * Added RFC1006 as separate library
  *
- * Revision 1.3  1995/03/16  17:42:39  quinn
- * Little changes
+ * Revision 1.14  1995/03/30  12:18:17  quinn
+ * Fixed bug.
  *
- * Revision 1.2  1995/03/16  13:29:01  quinn
- * Partitioned server.
+ * Revision 1.13  1995/03/30  09:09:24  quinn
+ * Added state-handle and some support for asynchronous activities.
  *
- * Revision 1.1  1995/03/15  16:02:10  quinn
- * Modded session.c seshigh.c
+ * Revision 1.12  1995/03/29  15:40:16  quinn
+ * Ongoing work. Statserv is now dynamic by default
  *
- * Revision 1.10  1995/03/15  15:18:51  quinn
- * Little changes to better support nonblocking I/O
- * Added backend.h
+ * Revision 1.11  1995/03/28  09:16:21  quinn
+ * Added record packing to the search request
  *
- * Revision 1.9  1995/03/15  13:20:23  adam
- * Yet another bug fix in very dummy_database...
+ * Revision 1.10  1995/03/27  08:34:24  quinn
+ * Added dynamic server functionality.
+ * Released bindings to session.c (is now redundant)
  *
- * Revision 1.8  1995/03/15  11:18:17  quinn
- * Smallish changes.
+ * Revision 1.9  1995/03/22  15:01:26  quinn
+ * Adjusting record packing.
  *
- * Revision 1.7  1995/03/15  09:40:15  adam
- * Bug fixes in dummy_database_...
+ * Revision 1.8  1995/03/22  10:13:21  quinn
+ * Working on record packer
  *
- * Revision 1.6  1995/03/15  09:08:30  adam
- * Take care of preferredMessageSize.
+ * Revision 1.7  1995/03/21  15:53:31  quinn
+ * Little changes.
  *
- * Revision 1.5  1995/03/15  08:37:44  quinn
- * Now we're pretty much set for nonblocking I/O.
+ * Revision 1.6  1995/03/21  12:30:09  quinn
+ * Beginning to add support for record packing.
  *
- * Revision 1.4  1995/03/15  08:27:20  adam
- * PresentRequest changed to return MARC records from file 'dummy-records'.
+ * Revision 1.5  1995/03/17  10:44:13  quinn
+ * Added catch of null-string in makediagrec
  *
- * Revision 1.3  1995/03/14  16:59:48  quinn
- * Bug-fixes
+ * Revision 1.4  1995/03/17  10:18:08  quinn
+ * Added memory management.
  *
- * Revision 1.2  1995/03/14  11:30:14  quinn
- * Works better now.
+ * Revision 1.3  1995/03/16  17:42:39  quinn
+ * Little changes
  *
- * Revision 1.1  1995/03/14  10:28:01  quinn
- * More work on demo server.
+ * Revision 1.2  1995/03/16  13:29:01  quinn
+ * Partitioned server.
  *
+ * Revision 1.1  1995/03/15  16:02:10  quinn
+ * Modded session.c to seshigh.c
  *
  */
 
 #include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
 #include <assert.h>
 
 #include <comstack.h>
 #include <eventl.h>
 #include <session.h>
 #include <proto.h>
+#include <oid.h>
+#include <log.h>
 
 #include <backend.h>
 
-#include <iso2709.h>
-
 #define ENCODE_BUFFER_SIZE 10000
 
 static int process_apdu(IOCHAN chan);
 static int process_initRequest(IOCHAN client, Z_InitRequest *req);
 static int process_searchRequest(IOCHAN client, Z_SearchRequest *req);
 static int process_presentRequest(IOCHAN client, Z_PresentRequest *req);
+static int process_scanRequest(IOCHAN client, Z_ScanRequest *req);
+
+extern int dynamic;
+extern char *apdufile;
+
+static FILE *apduf = 0; /* for use in static mode */
 
 association *create_association(IOCHAN channel, COMSTACK link)
 {
@@ -86,12 +96,55 @@ association *create_association(IOCHAN channel, COMSTACK link)
     if (!(new->decode = odr_createmem(ODR_DECODE)) ||
        !(new->encode = odr_createmem(ODR_ENCODE)))
        return 0;
+    if (apdufile)
+    {
+       char filename[256];
+       FILE *f;
+
+       if (!(new->print = odr_createmem(ODR_PRINT)))
+           return 0;
+       if (*apdufile)
+       {
+           strcpy(filename, apdufile);
+           if (!dynamic)
+           {
+               if (!apduf)
+               {
+                   if (!(apduf = fopen(filename, "w")))
+                   {
+                       logf(LOG_WARN|LOG_ERRNO, "%s", filename);
+                       return 0;
+                   }
+                   setvbuf(apduf, 0, _IONBF, 0);
+               }
+               f = apduf;
+           }
+           else 
+           {
+               sprintf(filename + strlen(filename), ".%d", getpid());
+               if (!(f = fopen(filename, "w")))
+               {
+                   logf(LOG_WARN|LOG_ERRNO, "%s", filename);
+                   return 0;
+               }
+               setvbuf(f, 0, _IONBF, 0);
+           }
+           odr_setprint(new->print, f);
+       }
+    }
+    else
+       new->print = 0;
     if (!(new->encode_buffer = malloc(ENCODE_BUFFER_SIZE)))
        return 0;
     odr_setbuf(new->encode, new->encode_buffer, ENCODE_BUFFER_SIZE);
     new->state = ASSOC_UNINIT;
     new->input_buffer = 0;
     new->input_buffer_len = 0;
+    new->backend = 0;
+    if (cs_getproto(link) == CS_Z3950)
+       new->proto = PROTO_Z3950;
+    else
+       new->proto = PROTO_SR;
     return new;
 }
 
@@ -99,9 +152,13 @@ void destroy_association(association *h)
 {
     odr_destroy(h->decode);
     odr_destroy(h->encode);
+    if (h->print)
+       odr_destroy(h->print);
     free(h->encode_buffer);
     if (h->input_buffer)
        free(h->input_buffer);
+    if (h->backend)
+       bend_close(h->backend);
     free(h);
 }
 
@@ -118,7 +175,7 @@ void ir_session(IOCHAN h, int event)
        switch (res)
        {
            case 0: case -1: /* connection closed by peer */
-               fprintf(stderr, "Closed connection\n");
+               logf(LOG_LOG, "Connection closed by client");
                cs_close(conn);
                destroy_association(assoc);
                iochan_destroy(h);
@@ -129,7 +186,6 @@ void ir_session(IOCHAN h, int event)
                assoc->input_apdu_len = res;
                if (process_apdu(h) < 0)
                {
-                   fprintf(stderr, "Operation failed\n");
                    cs_close(conn);
                    destroy_association(assoc);
                    iochan_destroy(h);
@@ -143,7 +199,7 @@ void ir_session(IOCHAN h, int event)
        switch (res = cs_put(conn, assoc->encode_buffer, assoc->encoded_len))
        {
            case -1:
-               fprintf(stderr, "Closed connection\n");
+               logf(LOG_LOG, "Connection closed by client");
                cs_close(conn);
                destroy_association(assoc);
                iochan_destroy(h);
@@ -156,7 +212,7 @@ void ir_session(IOCHAN h, int event)
     }
     else if (event == EVENT_EXCEPT)
     {
-       fprintf(stderr, "Exception on line\n");
+       logf(LOG_LOG, "Exception on line");
        cs_close(conn);
        destroy_association(assoc);
        iochan_destroy(h);
@@ -172,7 +228,14 @@ static int process_apdu(IOCHAN chan)
     odr_setbuf(assoc->decode, assoc->input_buffer, assoc->input_apdu_len);
     if (!z_APDU(assoc->decode, &apdu, 0))
     {
-       odr_perror(assoc->decode, "Incoming APDU");
+       logf(LOG_WARN, "ODR error: %s",
+           odr_errlist[odr_geterror(assoc->decode)]);
+       return -1;
+    }
+    if (assoc->print && !z_APDU(assoc->print, &apdu, 0))
+    {
+       logf(LOG_WARN, "ODR print error: %s", 
+           odr_errlist[odr_geterror(assoc->print)]);
        return -1;
     }
     switch (apdu->which)
@@ -183,11 +246,14 @@ static int process_apdu(IOCHAN chan)
            res = process_searchRequest(chan, apdu->u.searchRequest); break;
        case Z_APDU_presentRequest:
            res = process_presentRequest(chan, apdu->u.presentRequest); break;
+       case Z_APDU_scanRequest:
+           res = process_scanRequest(chan, apdu->u.scanRequest); break;
        default:
-           fprintf(stderr, "Bad APDU\n");
+           logf(LOG_WARN, "Bad APDU");
            return -1;
     }
-    odr_reset(assoc->decode);
+    odr_reset(assoc->decode); /* release incopming APDU */
+    odr_reset(assoc->encode); /* release stuff alloced before encoding */
     return res;
 }
 
@@ -199,31 +265,51 @@ static int process_initRequest(IOCHAN client, Z_InitRequest *req)
     association *assoc = iochan_getdata(client);
     bend_initrequest binitreq;
     bend_initresult *binitres;
+    Odr_bitmask options, protocolVersion;
 
-    fprintf(stderr, "Got initRequest.\n");
+    logf(LOG_LOG, "Got initRequest");
     if (req->implementationId)
-       fprintf(stderr, "Id:        %s\n", req->implementationId);
+       logf(LOG_LOG, "Id:        %s", req->implementationId);
     if (req->implementationName)
-       fprintf(stderr, "Name:      %s\n", req->implementationName);
+       logf(LOG_LOG, "Name:      %s", req->implementationName);
     if (req->implementationVersion)
-       fprintf(stderr, "Version:   %s\n", req->implementationVersion);
+       logf(LOG_LOG, "Version:   %s", req->implementationVersion);
 
     binitreq.configname = "default-config";
     if (!(binitres = bend_init(&binitreq)) || binitres->errcode)
     {
-       fprintf(stderr, "Bad response from backend\n");
+       logf(LOG_WARN, "Bad response from backend");
        return -1;
     }
 
+    assoc->backend = binitres->handle;
     apdup = &apdu;
     apdu.which = Z_APDU_initResponse;
     apdu.u.initResponse = &resp;
     resp.referenceId = req->referenceId;
-    resp.options = req->options; /* should check these */
-    resp.protocolVersion = req->protocolVersion;
+    ODR_MASK_ZERO(&options);
+    if (ODR_MASK_GET(req->options, Z_Options_search))
+       ODR_MASK_SET(&options, Z_Options_search);
+    if (ODR_MASK_GET(req->options, Z_Options_present))
+       ODR_MASK_SET(&options, Z_Options_present);
+    if (ODR_MASK_GET(req->options, Z_Options_delSet))
+       ODR_MASK_SET(&options, Z_Options_delSet);
+    if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
+       ODR_MASK_SET(&options, Z_Options_namedResultSets);
+    resp.options = &options;
+    ODR_MASK_ZERO(&protocolVersion);
+    if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
+       ODR_MASK_SET(&protocolVersion, Z_ProtocolVersion_1);
+    if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
+       ODR_MASK_SET(&protocolVersion, Z_ProtocolVersion_2);
+    resp.protocolVersion = &protocolVersion;
     assoc->maximumRecordSize = *req->maximumRecordSize;
-    if (assoc->maximumRecordSize > ENCODE_BUFFER_SIZE - 500)
-       assoc->maximumRecordSize = ENCODE_BUFFER_SIZE - 500;
+    /*
+     * This is not so hot. The big todo for ODR is dynamic memory allocation
+     * on encoding.
+     */
+    if (assoc->maximumRecordSize > ENCODE_BUFFER_SIZE - 1000)
+       assoc->maximumRecordSize = ENCODE_BUFFER_SIZE - 1000;
     assoc->preferredMessageSize = *req->preferredMessageSize;
     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
        assoc->preferredMessageSize = assoc->maximumRecordSize;
@@ -231,12 +317,13 @@ static int process_initRequest(IOCHAN client, Z_InitRequest *req)
     resp.maximumRecordSize = &assoc->maximumRecordSize;
     resp.result = &result;
     resp.implementationId = "YAZ";
-    resp.implementationName = "YAZ/Simple asynchronous test server";
-    resp.implementationVersion = "$Revision: 1.6 $";
+    resp.implementationName = "Index Data/YAZ Generic Frontend Server";
+    resp.implementationVersion = "$Revision: 1.17 $";
     resp.userInformationField = 0;
     if (!z_APDU(assoc->encode, &apdup, 0))
     {
-       odr_perror(assoc->encode, "Encode initres");
+       logf(LOG_FATAL, "ODR error encoding initres: %s",
+           odr_errlist[odr_geterror(assoc->encode)]);
        return -1;
     }
     odr_getbuf(assoc->encode, &assoc->encoded_len);
@@ -245,43 +332,193 @@ static int process_initRequest(IOCHAN client, Z_InitRequest *req)
     return 0;
 }
 
-static Z_Records *diagrec(int error, char *addinfo)
+static Z_Records *diagrec(oid_proto proto, int error, char *addinfo)
 {
     static Z_Records rec;
-    static Odr_oid bib1[] = { 1, 2, 3, 4, 5, -1 };
+    oident bib1;
     static Z_DiagRec dr;
     static int err;
 
-    fprintf(stderr, "Diagnostic: %d -- %s\n", error, addinfo);
+    bib1.proto = proto;
+    bib1.class = CLASS_DIAGSET;
+    bib1.value = VAL_BIB1;
+
+    logf(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
+       "NULL");
     err = error;
     rec.which = Z_Records_NSD;
     rec.u.nonSurrogateDiagnostic = &dr;
-    dr.diagnosticSetId = bib1;
+    dr.diagnosticSetId = oid_getoidbyent(&bib1);
     dr.condition = &err;
     dr.addinfo = addinfo ? addinfo : "";
     return &rec;
 }
 
-static Z_NamePlusRecord *surrogatediagrec(char *dbname, int error,
-                                           char *addinfo)
+static Z_NamePlusRecord *surrogatediagrec(oid_proto proto, char *dbname,
+                                           int error, char *addinfo)
 {
     static Z_NamePlusRecord rec;
     static Z_DiagRec dr;
-    static Odr_oid bib1[] = { 1, 2, 3, 4, 5, -1 };
     static int err;
+    oident bib1;
+
+    bib1.proto = proto;
+    bib1.class = CLASS_DIAGSET;
+    bib1.value = VAL_BIB1;
 
-    fprintf(stderr, "SurrogateDiagnotic: %d -- %s\n", error, addinfo);
+    logf(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
+    err = error;
     rec.databaseName = dbname;
     rec.which = Z_NamePlusRecord_surrogateDiagnostic;
     rec.u.surrogateDiagnostic = &dr;
-    dr.diagnosticSetId = bib1;
+    dr.diagnosticSetId = oid_getoidbyent(&bib1);
     dr.condition = &err;
     dr.addinfo = addinfo ? addinfo : "";
     return &rec;
 }
 
-static Z_Records *pack_records(association *a, int num, Z_ElementSetNames *esn)
+static Z_DiagRecs *diagrecs(oid_proto proto, int error, char *addinfo)
 {
+    static Z_DiagRecs recs;
+    static Z_DiagRec *recp[1], rec;
+    static int err;
+    oident bib1;
+
+    logf(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo);
+    bib1.proto = proto;
+    bib1.class = CLASS_DIAGSET;
+    bib1.value = VAL_BIB1;
+
+    err = error;
+    recs.num_diagRecs = 1;
+    recs.diagRecs = recp;
+    recp[0] = &rec;
+    rec.diagnosticSetId = oid_getoidbyent(&bib1);
+    rec.condition = &err;
+    rec.addinfo = addinfo ? addinfo : "";
+    return &recs;
+}
+
+#define MAX_RECORDS 256
+
+static Z_Records *pack_records(association *a, char *setname, int start,
+                               int *num, Z_ElementSetNames *esn,
+                               int *next, int *pres)
+{
+    int recno, total_length = 0, toget = *num;
+    static Z_Records records;
+    static Z_NamePlusRecordList reclist;
+    static Z_NamePlusRecord *list[MAX_RECORDS];
+    oident recform;
+    Odr_oid *oid;
+
+    records.which = Z_Records_DBOSD;
+    records.u.databaseOrSurDiagnostics = &reclist;
+    reclist.num_records = 0;
+    reclist.records = list;
+    *pres = Z_PRES_SUCCESS;
+    *num = 0;
+    *next = 0;
+
+    recform.proto = a->proto;
+    recform.class = CLASS_RECSYN;
+    recform.value = VAL_USMARC;
+    if (!(oid = odr_oiddup(a->encode, oid_getoidbyent(&recform))))
+       return 0;
+
+    logf(LOG_DEBUG, "Request to pack %d+%d", start, toget);
+    logf(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
+       a->maximumRecordSize);
+    for (recno = start; reclist.num_records < toget; recno++)
+    {
+       bend_fetchrequest freq;
+       bend_fetchresult *fres;
+       Z_NamePlusRecord *thisrec;
+       Z_DatabaseRecord *thisext;
+
+       if (reclist.num_records == MAX_RECORDS - 1)
+       {
+           *pres = Z_PRES_PARTIAL_2;
+           break;
+       }
+       freq.setname = setname;
+       freq.number = recno;
+       if (!(fres = bend_fetch(a->backend, &freq, 0)))
+       {
+           *pres = Z_PRES_FAILURE;
+           return diagrec(a->proto, 2, "Backend interface problem");
+       }
+       /* backend should be able to signal whether error is system-wide
+          or only pertaining to current record */
+       if (fres->errcode)
+       {
+           *pres = Z_PRES_FAILURE;
+           return diagrec(a->proto, fres->errcode, fres->errstring);
+       }
+       logf(LOG_DEBUG, "  fetched record, len=%d, total=%d",
+           fres->len, total_length);
+       if (fres->len + total_length > a->preferredMessageSize)
+       {
+           /* record is small enough, really */
+           if (fres->len <= a->preferredMessageSize)
+           {
+               logf(LOG_DEBUG, "  Dropped last normal-sized record");
+               *pres = Z_PRES_PARTIAL_2;
+               break;
+           }
+           /* record can only be fetched by itself */
+           if (fres->len < a->maximumRecordSize)
+           {
+               logf(LOG_DEBUG, "  Record > prefmsgsz");
+               if (toget > 1)
+               {
+                   logf(LOG_DEBUG, "  Dropped it");
+                   reclist.records[reclist.num_records] =
+                        surrogatediagrec(a->proto, fres->basename, 16, 0);
+                   reclist.num_records++;
+                   *pres = Z_PRES_PARTIAL_2;
+                   break;
+               }
+           }
+           else /* too big entirely */
+           {
+               logf(LOG_DEBUG, "Record > maxrcdsz");
+               reclist.records[reclist.num_records] =
+                   surrogatediagrec(a->proto, fres->basename, 17, 0);
+               reclist.num_records++;
+               *pres = Z_PRES_PARTIAL_2;
+               break;
+           }
+       }
+       if (!(thisrec = odr_malloc(a->encode, sizeof(*thisrec))))
+           return 0;
+       if (!(thisrec->databaseName = odr_malloc(a->encode,
+           strlen(fres->basename) + 1)))
+           return 0;
+       strcpy(thisrec->databaseName, fres->basename);
+       thisrec->which = Z_NamePlusRecord_databaseRecord;
+       if (!(thisrec->u.databaseRecord = thisext =  odr_malloc(a->encode,
+           sizeof(Z_DatabaseRecord))))
+           return 0;
+       thisext->direct_reference = oid; /* should be OID for current MARC */
+       thisext->indirect_reference = 0;
+       thisext->descriptor = 0;
+       thisext->which = ODR_EXTERNAL_octet;
+       if (!(thisext->u.octet_aligned = odr_malloc(a->encode,
+           sizeof(Odr_oct))))
+           return 0;
+       if (!(thisext->u.octet_aligned->buf = odr_malloc(a->encode, fres->len)))
+           return 0;
+       memcpy(thisext->u.octet_aligned->buf, fres->record, fres->len);
+       thisext->u.octet_aligned->len = thisext->u.octet_aligned->size =
+           fres->len;
+       reclist.records[reclist.num_records] = thisrec;
+       reclist.num_records++;
+       total_length += fres->len;
+       (*num)++;
+       *next = fres->last_in_set ? 0 : recno + 1;
+    }
+    return &records;
 }
 
 static int process_searchRequest(IOCHAN client, Z_SearchRequest *req)
@@ -291,40 +528,111 @@ static int process_searchRequest(IOCHAN client, Z_SearchRequest *req)
     association *assoc = iochan_getdata(client);
     int nulint = 0;
     bool_t sr = 1;
-    int nrp;
     bend_searchrequest bsrq;
     bend_searchresult *bsrt;
+    oident *oent;
+    int next = 0;
+    static int none = Z_RES_NONE;
 
-    fprintf(stderr, "Got SearchRequest.\n");
+    logf(LOG_LOG, "Got SearchRequest.");
     apdup = &apdu;
     apdu.which = Z_APDU_searchResponse;
     apdu.u.searchResponse = &resp;
     resp.referenceId = req->referenceId;
 
-    bsrq.setname = req->resultSetName;
-    bsrq.replace_set = *req->replaceIndicator;
-    bsrq.num_bases = req->num_databaseNames;
-    bsrq.basenames = req->databaseNames;
-    bsrq.query = req->query;
+    resp.records = 0;
+    if (req->query->which == Z_Query_type_1)
+    {
+       Z_RPNQuery *q = req->query->u.type_1;
 
-    if (!(bsrt = bend_search(&bsrq)))
-       return -1;
-    else if (bsrt->errcode)
-       resp.records = diagrec(bsrt->errcode, bsrt->errstring);
-    else
-       resp.records = 0;
+       if (!(oent = oid_getentbyoid(q->attributeSetId)) ||
+           oent->class != CLASS_ATTSET ||
+           oent->value != VAL_BIB1)
+       {
+           resp.records = diagrec(assoc->proto, 121, 0);
+           resp.resultCount = &nulint;
+           resp.numberOfRecordsReturned = &nulint;
+           resp.nextResultSetPosition = &nulint;
+           resp.searchStatus = &none;
+           resp.resultSetStatus = 0;
+           resp.presentStatus = 0;
+       }
+    }
+    if (!resp.records)
+    {
+       int toget;
+       Z_ElementSetNames *setnames;
+       int presst = 0;
+
+       bsrq.setname = req->resultSetName;
+       bsrq.replace_set = *req->replaceIndicator;
+       bsrq.num_bases = req->num_databaseNames;
+       bsrq.basenames = req->databaseNames;
+       bsrq.query = req->query;
+
+       if (!(bsrt = bend_search(assoc->backend, &bsrq, 0)))
+           return -1;
+       else if (bsrt->errcode)
+       {
 
-    resp.resultCount = &bsrt->hits;
-    resp.numberOfRecordsReturned = &nulint;
-    nrp = bsrt->hits ? 1 : 0;
-    resp.nextResultSetPosition = &nrp;
-    resp.searchStatus = &sr;
-    resp.resultSetStatus = &sr;
-    resp.presentStatus = 0;
+           resp.records = diagrec(assoc->proto, bsrt->errcode,
+               bsrt->errstring);
+           resp.resultCount = &nulint;
+           resp.numberOfRecordsReturned = &nulint;
+           resp.nextResultSetPosition = &nulint;
+           resp.searchStatus = &nulint;
+           resp.resultSetStatus = &none;
+           resp.presentStatus = 0;
+       }
+       else
+       {
+           resp.records = 0;
+
+           resp.resultCount = &bsrt->hits;
+
+           /* how many records does the user agent want, then? */
+           if (bsrt->hits <= *req->smallSetUpperBound)
+           {
+               toget = bsrt->hits;
+               setnames = req->smallSetElementSetNames;
+           }
+           else if (bsrt->hits < *req->largeSetLowerBound)
+           {
+               toget = *req->mediumSetPresentNumber;
+               if (toget > bsrt->hits)
+                   toget = bsrt->hits;
+               setnames = req->mediumSetElementSetNames;
+           }
+           else
+               toget = 0;
+
+           if (toget && !resp.records)
+           {
+               resp.records = pack_records(assoc, req->resultSetName, 1,
+                   &toget, setnames, &next, &presst);
+               if (!resp.records)
+                   return -1;
+               resp.numberOfRecordsReturned = &toget;
+               resp.nextResultSetPosition = &next;
+               resp.searchStatus = &sr;
+               resp.resultSetStatus = 0;
+               resp.presentStatus = &presst;
+           }
+           else
+           {
+               resp.numberOfRecordsReturned = &nulint;
+               resp.nextResultSetPosition = &next;
+               resp.searchStatus = &sr;
+               resp.resultSetStatus = 0;
+               resp.presentStatus = 0;
+           }
+       }
+    }
 
     if (!z_APDU(assoc->encode, &apdup, 0))
     {
-       odr_perror(assoc->encode, "Encode searchres");
+       logf(LOG_FATAL, "ODR error encoding searchres: %s",
+           odr_errlist[odr_geterror(assoc->encode)]);
        return -1;
     }
     odr_getbuf(assoc->encode, &assoc->encoded_len);
@@ -338,23 +646,126 @@ static int process_presentRequest(IOCHAN client, Z_PresentRequest *req)
     Z_APDU apdu, *apdup;
     Z_PresentResponse resp;
     association *assoc = iochan_getdata(client);
-    int nrr = 1;
+    int presst, next, num;
 
-    fprintf(stderr, "Got PresentRequest.\n");
+    logf(LOG_LOG, "Got PresentRequest.");
     apdup = &apdu;
     apdu.which = Z_APDU_presentResponse;
     apdu.u.presentResponse = &resp;
     resp.referenceId = req->referenceId;
 
-    resp.numberOfRecordsReturned = &nrr;
-    resp.nextResultSetPosition = &nrr;
-    resp.presentStatus = &nrr;
+    num = *req->numberOfRecordsRequested;
+    resp.records = pack_records(assoc, req->resultSetId,
+       *req->resultSetStartPoint, &num, req->elementSetNames, &next, &presst);
+    if (!resp.records)
+       return -1;
+    resp.numberOfRecordsReturned = &num;
+    resp.presentStatus = &presst;
+    resp.nextResultSetPosition = &next;
 
-    resp.records = diagrec(1, "No records yet.");
+    if (!z_APDU(assoc->encode, &apdup, 0))
+    {
+       logf(LOG_FATAL, "ODR error encoding initres: %s",
+           odr_errlist[odr_geterror(assoc->encode)]);
+       return -1;
+    }
+    odr_getbuf(assoc->encode, &assoc->encoded_len);
+    odr_reset(assoc->encode);
+    iochan_setflags(client, EVENT_OUTPUT | EVENT_EXCEPT);
+    return 0;
+}
 
+static int process_scanRequest(IOCHAN client, Z_ScanRequest *req)
+{
+    association *assoc = iochan_getdata(client);
+    Z_APDU apdu, *apdup;
+    Z_ScanResponse res;
+    bend_scanrequest srq;
+    bend_scanresult *srs;
+    int scanStatus = Z_Scan_failure;
+    int numberOfEntriesReturned = 0;
+    oident *attent;
+    Z_ListEntries ents;
+#define SCAN_MAX_ENTRIES 200
+    Z_Entry *tab[SCAN_MAX_ENTRIES];
+
+    apdup = &apdu;
+    apdu.which = Z_APDU_scanResponse;
+    apdu.u.scanResponse = &res;
+    res.referenceId = req->referenceId;
+    res.stepSize = 0;
+    res.scanStatus = &scanStatus;
+    res.numberOfEntriesReturned = &numberOfEntriesReturned;
+    res.positionOfTerm = 0;
+    res.entries = &ents;
+    ents.which = Z_ListEntries_nonSurrogateDiagnostics;
+    res.attributeSet = 0;
+
+    if (req->attributeSet && (!(attent = oid_getentbyoid(req->attributeSet)) ||
+       attent->class != CLASS_ATTSET || attent->value != VAL_BIB1))
+       ents.u.nonSurrogateDiagnostics = diagrecs(assoc->proto, 121, 0);
+    else if (req->stepSize && *req->stepSize > 0)
+       ents.u.nonSurrogateDiagnostics = diagrecs(assoc->proto, 205, 0);
+    else
+    {
+       srq.num_bases = req->num_databaseNames;
+       srq.basenames = req->databaseNames;
+       srq.num_entries = *req->numberOfTermsRequested;
+       srq.term = req->termListAndStartPoint;
+       srq.term_position = req->preferredPositionInResponse ?
+           *req->preferredPositionInResponse : 1;
+       if (!(srs = bend_scan(assoc->backend, &srq, 0)))
+           ents.u.nonSurrogateDiagnostics = diagrecs(assoc->proto, 2, 0);
+       else if (srs->errcode)
+           ents.u.nonSurrogateDiagnostics = diagrecs(assoc->proto,
+               srs->errcode, srs->errstring);
+       else
+       {
+           int i;
+           static Z_Entries list;
+
+           if (srs->status == BEND_SCAN_PARTIAL)
+               scanStatus = Z_Scan_partial_5;
+           else
+               scanStatus = 1;  /* Z_Scan_success; */ /* assumption for now */
+           ents.which = Z_ListEntries_entries;
+           ents.u.entries = &list;
+           list.entries = tab;
+           for (i = 0; i < srs->num_entries; i++)
+           {
+               Z_Entry *e;
+               Z_TermInfo *t;
+               Odr_oct *o;
+
+               if (i >= SCAN_MAX_ENTRIES)
+               {
+                   scanStatus = Z_Scan_partial_4;
+                   break;
+               }
+               list.entries[i] = e = odr_malloc(assoc->encode, sizeof(*e));
+               e->which = Z_Entry_termInfo;
+               e->u.termInfo = t = odr_malloc(assoc->encode, sizeof(*t));
+               t->suggestedAttributes = 0;
+               t->alternativeTerm = 0;
+               t->byAttributes = 0;
+               t->globalOccurrences = &srs->entries[i].occurrences;
+               t->term = odr_malloc(assoc->encode, sizeof(*t->term));
+               t->term->which = Z_Term_general;
+               t->term->u.general = o = odr_malloc(assoc->encode,
+                   sizeof(Odr_oct));
+               o->buf = odr_malloc(assoc->encode, o->len = o->size =
+                   strlen(srs->entries[i].term));
+               memcpy(o->buf, srs->entries[i].term, o->len);
+           }
+           list.num_entries = i;
+           res.numberOfEntriesReturned = &list.num_entries;
+           res.positionOfTerm = &srs->term_position;
+       }
+    }
     if (!z_APDU(assoc->encode, &apdup, 0))
     {
-       odr_perror(assoc->encode, "Encode presentres");
+       logf(LOG_FATAL, "ODR error encoding initres: %s",
+           odr_errlist[odr_geterror(assoc->encode)]);
        return -1;
     }
     odr_getbuf(assoc->encode, &assoc->encoded_len);