/*
- * Copyright (C) 1994, Index Data I/S
- * All rights reserved.
+ * Copyright (c) 1995-1998, Index Data
+ * See the file LICENSE for details.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: seshigh.c,v $
- * Revision 1.3 1995-03-16 17:42:39 quinn
- * Little changes
+ * Revision 1.74 1998-03-31 15:13:20 adam
+ * Development towards compiled ASN.1.
*
- * Revision 1.2 1995/03/16 13:29:01 quinn
- * Partitioned server.
+ * Revision 1.73 1998/03/31 11:07:45 adam
+ * Furhter work on UNIverse resource report.
+ * Added Extended Services handling in frontend server.
*
- * Revision 1.1 1995/03/15 16:02:10 quinn
- * Modded session.c seshigh.c
+ * Revision 1.72 1998/02/11 11:53:35 adam
+ * Changed code so that it compiles as C++.
+ *
+ * Revision 1.71 1998/02/10 11:03:57 adam
+ * Added support for extended handlers in backend server interface.
+ *
+ * Revision 1.70 1998/01/29 13:15:35 adam
+ * Implemented sort for the backend interface.
+ *
+ * Revision 1.69 1997/09/30 11:48:12 adam
+ * Fixed bug introduced by previous commit.
+ *
+ * Revision 1.68 1997/09/29 13:18:59 adam
+ * Added function, oid_ent_to_oid, to replace the function
+ * oid_getoidbyent, which is not thread safe.
+ *
+ * Revision 1.67 1997/09/17 12:10:40 adam
+ * YAZ version 1.4.
+ *
+ * Revision 1.66 1997/09/05 15:26:44 adam
+ * Added ODR encode in search and scen bend request structures.
+ * Fixed a few enums that caused trouble with C++.
+ *
+ * Revision 1.65 1997/09/01 08:53:01 adam
+ * New windows NT/95 port using MSV5.0. The test server 'ztest' was
+ * moved a separate directory. MSV5.0 project server.dsp created.
+ * As an option, the server can now operate as an NT service.
+ *
+ * Revision 1.64 1997/04/30 08:52:11 quinn
+ * Null
+ *
+ * Revision 1.63 1996/10/11 11:57:26 quinn
+ * Smallish
+ *
+ * Revision 1.62 1996/07/06 19:58:35 quinn
+ * System headerfiles gathered in yconfig
+ *
+ * Revision 1.61 1996/06/10 08:56:16 quinn
+ * Work on Summary.
+ *
+ * Revision 1.60 1996/05/30 11:03:10 quinn
+ * Fixed NextresultSetPosition bug fixed.
+ *
+ * Revision 1.59 1996/05/14 09:26:46 quinn
+ * Added attribute set to scan backend
+ *
+ * Revision 1.58 1996/02/20 12:53:04 quinn
+ * Chanes to SCAN
+ *
+ * Revision 1.57 1996/01/02 08:57:47 quinn
+ * Changed enums in the ASN.1 .h files to #defines. Changed oident.class to oclass
+ *
+ * Revision 1.56 1995/12/14 11:09:57 quinn
+ * Work on Explain
+ *
+ * Revision 1.55 1995/11/08 17:41:37 quinn
+ * Smallish.
+ *
+ * Revision 1.54 1995/11/08 15:11:29 quinn
+ * Log of close transmit.
+ *
+ * Revision 1.53 1995/11/01 13:54:58 quinn
+ * Minor adjustments
+ *
+ * Revision 1.52 1995/11/01 12:19:13 quinn
+ * Second attempt to fix same bug.
+ *
+ * Revision 1.50 1995/10/25 16:58:32 quinn
+ * Simple.
+ *
+ * Revision 1.49 1995/10/16 13:51:53 quinn
+ * Changes to provide Especs to the backend.
+ *
+ * Revision 1.48 1995/10/06 08:51:20 quinn
+ * Added Write-buffer.
+ *
+ * Revision 1.47 1995/08/29 14:24:16 quinn
+ * Added second half of close-handshake
+ *
+ * Revision 1.46 1995/08/29 11:17:58 quinn
+ * Added code to receive close
+ *
+ * Revision 1.45 1995/08/21 09:11:00 quinn
+ * Smallish fixes to suppport new formats.
+ *
+ * Revision 1.44 1995/08/17 12:45:25 quinn
+ * Fixed minor problems with GRS-1. Added support in c&s.
+ *
+ * Revision 1.43 1995/08/15 12:00:31 quinn
+ * Updated External
+ *
+ * Revision 1.42 1995/08/15 11:16:50 quinn
+ *
+ * Revision 1.41 1995/08/02 10:23:06 quinn
+ * Smallish
+ *
+ * Revision 1.40 1995/07/31 14:34:26 quinn
+ * Fixed bug in process_searchResponse (numberOfRecordsReturned).
+ *
+ * Revision 1.39 1995/06/27 13:21:00 quinn
+ * SUTRS support
+ *
+ * Revision 1.38 1995/06/19 12:39:11 quinn
+ * Fixed bug in timeout code. Added BER dumper.
+ *
+ * Revision 1.37 1995/06/16 13:16:14 quinn
+ * Fixed Defaultdiagformat.
+ *
+ * Revision 1.36 1995/06/16 10:31:36 quinn
+ * Added session timeout.
+ *
+ * Revision 1.35 1995/06/15 07:45:14 quinn
+ * Moving to v3.
+ *
+ * Revision 1.34 1995/06/14 15:26:46 quinn
+ * *** empty log message ***
+ *
+ * Revision 1.33 1995/06/06 14:57:05 quinn
+ * Better diagnostics.
+ *
+ * Revision 1.32 1995/06/06 08:41:44 quinn
+ * Better diagnostics.
+ *
+ * Revision 1.31 1995/06/06 08:15:37 quinn
+ * Cosmetic.
+ *
+ * Revision 1.30 1995/06/05 10:53:32 quinn
+ * Added a better SCAN.
+ *
+ * Revision 1.29 1995/06/01 11:25:03 quinn
+ * Smallish.
*
- * Revision 1.10 1995/03/15 15:18:51 quinn
- * Little changes to better support nonblocking I/O
- * Added backend.h
+ * Revision 1.28 1995/06/01 11:21:01 quinn
+ * Attempting to fix a bug in pack-records. replaced break with continue
+ * for large records, according to standard.
*
- * Revision 1.9 1995/03/15 13:20:23 adam
- * Yet another bug fix in very dummy_database...
+ * Revision 1.27 1995/05/29 08:12:06 quinn
+ * Moved oid to util
*
- * Revision 1.8 1995/03/15 11:18:17 quinn
- * Smallish changes.
+ * Revision 1.26 1995/05/18 13:02:12 quinn
+ * Smallish.
*
- * Revision 1.7 1995/03/15 09:40:15 adam
- * Bug fixes in dummy_database_...
+ * Revision 1.25 1995/05/17 08:42:26 quinn
+ * Transfer auth info to backend. Allow backend to reject init gracefully.
*
- * Revision 1.6 1995/03/15 09:08:30 adam
- * Take care of preferredMessageSize.
+ * Revision 1.24 1995/05/16 08:51:04 quinn
+ * License, documentation, and memory fixes
*
- * Revision 1.5 1995/03/15 08:37:44 quinn
- * Now we're pretty much set for nonblocking I/O.
+ * Revision 1.23 1995/05/15 13:25:10 quinn
+ * Fixed memory bug.
*
- * Revision 1.4 1995/03/15 08:27:20 adam
- * PresentRequest changed to return MARC records from file 'dummy-records'.
+ * Revision 1.22 1995/05/15 11:56:39 quinn
+ * Asynchronous facilities. Restructuring of seshigh code.
*
- * Revision 1.3 1995/03/14 16:59:48 quinn
- * Bug-fixes
+ * Revision 1.21 1995/05/02 08:53:19 quinn
+ * Trying in vain to fix comm with ISODE
*
- * Revision 1.2 1995/03/14 11:30:14 quinn
- * Works better now.
+ * Revision 1.20 1995/04/20 15:13:00 quinn
+ * Cosmetic
*
- * Revision 1.1 1995/03/14 10:28:01 quinn
- * More work on demo server.
+ * Revision 1.19 1995/04/18 08:15:34 quinn
+ * Added dynamic memory allocation on encoding (whew). Code is now somewhat
+ * neater. We'll make the same change for decoding one day.
*
+ * Revision 1.18 1995/04/17 11:28:25 quinn
+ * Smallish
+ *
+ * Revision 1.17 1995/04/10 10:23:36 quinn
+ * Some work to add scan and other things.
+ *
+ * Revision 1.16 1995/03/31 09:18:55 quinn
+ * Added logging.
+ *
+ * Revision 1.15 1995/03/30 14:03:23 quinn
+ * Added RFC1006 as separate library
+ *
+ * Revision 1.14 1995/03/30 12:18:17 quinn
+ * Fixed bug.
+ *
+ * Revision 1.13 1995/03/30 09:09:24 quinn
+ * Added state-handle and some support for asynchronous activities.
+ *
+ * Revision 1.12 1995/03/29 15:40:16 quinn
+ * Ongoing work. Statserv is now dynamic by default
+ *
+ * Revision 1.11 1995/03/28 09:16:21 quinn
+ * Added record packing to the search request
+ *
+ * Revision 1.10 1995/03/27 08:34:24 quinn
+ * Added dynamic server functionality.
+ * Released bindings to session.c (is now redundant)
+ *
+ * Revision 1.9 1995/03/22 15:01:26 quinn
+ * Adjusting record packing.
+ *
+ * Revision 1.8 1995/03/22 10:13:21 quinn
+ * Working on record packer
+ *
+ * Revision 1.7 1995/03/21 15:53:31 quinn
+ * Little changes.
+ *
+ * Revision 1.6 1995/03/21 12:30:09 quinn
+ * Beginning to add support for record packing.
+ *
+ * Revision 1.5 1995/03/17 10:44:13 quinn
+ * Added catch of null-string in makediagrec
+ *
+ * Revision 1.4 1995/03/17 10:18:08 quinn
+ * Added memory management.
+ *
+ * Revision 1.3 1995/03/16 17:42:39 quinn
+ * Little changes
+ *
+ * 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
+ *
+ */
+
+/*
+ * Frontend server logic.
+ *
+ * This code receives incoming APDUs, and handles client requests by means
+ * of the backend API.
+ *
+ * Some of the code is getting quite involved, compared to simpler servers -
+ * primarily because it is asynchronous both in the communication with
+ * the user and the backend. We think the complexity will pay off in
+ * the form of greater flexibility when more asynchronous facilities
+ * are implemented.
+ *
+ * Memory management has become somewhat involved. In the simple case, where
+ * only one PDU is pending at a time, it will simply reuse the same memory,
+ * once it has found its working size. When we enable multiple concurrent
+ * operations, perhaps even with multiple parallel calls to the backend, it
+ * will maintain a pool of buffers for encoding and decoding, trying to
+ * minimize memory allocation/deallocation during normal operation.
+ *
+ * TODOs include (and will be done in order of public interest):
+ *
+ * Support for EXPLAIN - provide simple meta-database system.
+ * Support for access control.
+ * Support for resource control.
+ * Support for extended services - primarily Item Order.
+ * Rest of Z39.50-1994
*
*/
+#include <yconfig.h>
#include <stdlib.h>
+#include <stdio.h>
+#ifdef WINDOWS
+#include <process.h>
+#else
+#include <unistd.h>
+#endif
#include <assert.h>
+#include <xmalloc.h>
#include <comstack.h>
-#include <eventl.h>
-#include <session.h>
+#include "eventl.h"
+#include "session.h"
#include <proto.h>
+#include <oid.h>
+#include <log.h>
+#include <statserv.h>
#include <backend.h>
-#include <iso2709.h>
+static int process_request(association *assoc, request *req);
+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);
+static Z_APDU *process_searchRequest(association *assoc, request *reqb,
+ int *fd);
+static Z_APDU *response_searchRequest(association *assoc, request *reqb,
+ bend_search_rr *bsrr, int *fd);
+static Z_APDU *process_presentRequest(association *assoc, request *reqb,
+ int *fd);
+static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
+static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
+static void process_close(association *assoc, request *reqb);
+void save_referenceId (request *reqb, Z_ReferenceId *refid);
-#define ENCODE_BUFFER_SIZE 10000
+static FILE *apduf = 0; /* for use in static mode */
+static statserv_options_block *control_block = 0;
-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);
+/* Chas: Added in from DALI */
+static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
+/* Chas: End of addition from DALI */
+/*
+ * Create and initialize a new association-handle.
+ * channel : iochannel for the current line.
+ * link : communications channel.
+ * Returns: 0 or a new association handle.
+ */
association *create_association(IOCHAN channel, COMSTACK link)
{
- association *new;
+ association *anew;
- if (!(new = malloc(sizeof(*new))))
+ if (!control_block)
+ control_block = statserv_getcontrol();
+ if (!(anew = (association *)xmalloc(sizeof(*anew))))
return 0;
- new->client_chan = channel;
- new->client_link = link;
- if (!(new->decode = odr_createmem(ODR_DECODE)) ||
- !(new->encode = odr_createmem(ODR_ENCODE)))
+ anew->client_chan = channel;
+ anew->client_link = link;
+ if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
+ !(anew->encode = odr_createmem(ODR_ENCODE)))
return 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;
- return new;
+ if (*control_block->apdufile)
+ {
+ char filename[256];
+ FILE *f;
+
+ strcpy(filename, control_block->apdufile);
+ if (!(anew->print = odr_createmem(ODR_PRINT)))
+ return 0;
+ if (*control_block->apdufile != '-')
+ {
+ strcpy(filename, control_block->apdufile);
+ if (!control_block->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(anew->print, f);
+ }
+ }
+ else
+ anew->print = 0;
+ anew->input_buffer = 0;
+ anew->input_buffer_len = 0;
+ anew->backend = 0;
+ anew->state = ASSOC_NEW;
+ request_initq(&anew->incoming);
+ request_initq(&anew->outgoing);
+ anew->proto = cs_getproto(link);
+ return anew;
}
+/*
+ * Free association and release resources.
+ */
void destroy_association(association *h)
{
odr_destroy(h->decode);
odr_destroy(h->encode);
- free(h->encode_buffer);
- free(h);
+ if (h->print)
+ odr_destroy(h->print);
+ if (h->input_buffer)
+ xfree(h->input_buffer);
+ if (h->backend)
+ bend_close(h->backend);
+ while (request_deq(&h->incoming));
+ while (request_deq(&h->outgoing));
+ request_delq(&h->incoming);
+ request_delq(&h->outgoing);
+ xfree(h);
}
+static void do_close(association *a, int reason, char *message)
+{
+ Z_APDU apdu;
+ Z_Close *cls = zget_Close(a->encode);
+ request *req = request_get(&a->outgoing);
+
+ /* Purge request queue */
+ while (request_deq(&a->incoming));
+ while (request_deq(&a->outgoing));
+ if (a->version >= 3)
+ {
+ logf(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
+ reason, message ? message : "none");
+ apdu.which = Z_APDU_close;
+ apdu.u.close = cls;
+ *cls->closeReason = reason;
+ cls->diagnosticInformation = message;
+ process_response(a, req, &apdu);
+ iochan_settimeout(a->client_chan, 60);
+ }
+ else
+ {
+ logf(LOG_DEBUG, "v2 client. No Close PDU");
+ iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
+ }
+ a->state = ASSOC_DEAD;
+}
+
+/*
+ * This is where PDUs from the client are read and the further
+ * processing is initiated. Flow of control moves down through the
+ * various process_* functions below, until the encoded result comes back up
+ * to the output handler in here.
+ *
+ * h : the I/O channel that has an outstanding event.
+ * event : the current outstanding event.
+ */
void ir_session(IOCHAN h, int event)
{
int res;
- association *assoc = iochan_getdata(h);
+ association *assoc = (association *)iochan_getdata(h);
COMSTACK conn = assoc->client_link;
+ request *req;
- if (event == EVENT_INPUT)
+ assert(h && conn && assoc);
+ if (event == EVENT_TIMEOUT)
{
- assert(assoc && conn);
- res = cs_get(conn, &assoc->input_buffer, &assoc->input_buffer_len);
- switch (res)
+ if (assoc->state != ASSOC_UP)
+ {
+ logf(LOG_LOG, "Final timeout - closing connection.");
+ cs_close(conn);
+ destroy_association(assoc);
+ iochan_destroy(h);
+ }
+ else
{
- case 0: case -1: /* connection closed by peer */
- fprintf(stderr, "Closed connection\n");
+ logf(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 & EVENT_INPUT)
+ {
+ logf(LOG_DEBUG, "ir_session (input)");
+ assert(assoc && conn);
+ /* We aren't speaking to this fellow */
+ if (assoc->state == ASSOC_DEAD)
+ {
+ logf(LOG_LOG, "Closed connection after reject");
cs_close(conn);
destroy_association(assoc);
iochan_destroy(h);
return;
- case 1: /* incomplete read */
+ }
+ if ((res = cs_get(conn, &assoc->input_buffer,
+ &assoc->input_buffer_len)) <= 0)
+ {
+ logf(LOG_LOG, "Connection closed by client");
+ cs_close(conn);
+ destroy_association(assoc);
+ iochan_destroy(h);
return;
- default: /* data! */
- assoc->input_apdu_len = res;
- if (process_apdu(h) < 0)
- {
- fprintf(stderr, "Operation failed\n");
- cs_close(conn);
- destroy_association(assoc);
- iochan_destroy(h);
- }
- else if (cs_more(conn)) /* arrange to be called again */
- iochan_setevent(h, EVENT_INPUT);
+ }
+ else if (res == 1) /* incomplete read - wait for more */
+ 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);
+ 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))
+ {
+ logf(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);
+ 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))
+ {
+ logf(LOG_WARN, "ODR print error: %s",
+ odr_errmsg(odr_geterror(assoc->print)));
+ odr_reset(assoc->print);
+ }
+ request_enq(&assoc->incoming, req);
+ }
+
+ /* can we do something yet? */
+ req = request_head(&assoc->incoming);
+ if (req->state == REQUEST_IDLE)
+ {
+ request_deq(&assoc->incoming);
+ if (process_request(assoc, req) < 0)
+ do_close(assoc, Z_Close_systemProblem, "Unknown error");
}
}
- else if (event == EVENT_OUTPUT)
+ if (event & EVENT_OUTPUT)
{
- switch (res = cs_put(conn, assoc->encode_buffer, assoc->encoded_len))
+ request *req = request_head(&assoc->outgoing);
+
+ logf(LOG_DEBUG, "ir_session (output)");
+ req->state = REQUEST_PENDING;
+ switch (res = cs_put(conn, req->response, req->len_response))
{
case -1:
- fprintf(stderr, "Closed connection\n");
+ logf(LOG_LOG, "Connection closed by client");
cs_close(conn);
destroy_association(assoc);
iochan_destroy(h);
- case 0: /* all sent */
- iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset */
break;
- case 1: /* partial send */
- break; /* we'll get called again */
+ 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 */
}
}
- else if (event == EVENT_EXCEPT)
+ if (event & EVENT_EXCEPT)
{
- fprintf(stderr, "Exception on line\n");
+ logf(LOG_DEBUG, "ir_session (exception)");
cs_close(conn);
destroy_association(assoc);
iochan_destroy(h);
}
}
-static int process_apdu(IOCHAN chan)
+/*
+ * Initiate request processing.
+ */
+static int process_request(association *assoc, request *req)
{
- Z_APDU *apdu;
- int res;
- association *assoc = iochan_getdata(chan);
+ int fd = -1;
+ Z_APDU *res;
+ int retval;
- odr_setbuf(assoc->decode, assoc->input_buffer, assoc->input_apdu_len);
- if (!z_APDU(assoc->decode, &apdu, 0))
- {
- odr_perror(assoc->decode, "Incoming APDU");
- return -1;
- }
- switch (apdu->which)
+ assert(req && req->state == REQUEST_IDLE);
+ switch (req->request->which)
{
case Z_APDU_initRequest:
- res = process_initRequest(chan, apdu->u.initRequest); break;
+ res = process_initRequest(assoc, req); break;
case Z_APDU_searchRequest:
- res = process_searchRequest(chan, apdu->u.searchRequest); break;
+ res = process_searchRequest(assoc, req, &fd); break;
case Z_APDU_presentRequest:
- res = process_presentRequest(chan, apdu->u.presentRequest); break;
+ res = process_presentRequest(assoc, req, &fd); break;
+ case Z_APDU_scanRequest:
+ res = process_scanRequest(assoc, req, &fd); break;
+/* Chas: Added in from DALI */
+ 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;
+ }
+/* Chas: End of addition from DALI */
+ 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;
default:
- fprintf(stderr, "Bad APDU\n");
+ logf(LOG_WARN, "Bad APDU received");
return -1;
}
- return res;
+ if (res)
+ {
+ logf(LOG_DEBUG, " result immediately available");
+ retval = process_response(assoc, req, res);
+ }
+ else if (fd < 0)
+ {
+ logf(LOG_DEBUG, " result unavailble");
+ retval = 0;
+ }
+ else /* no result yet - one will be provided later */
+ {
+ IOCHAN chan;
+
+ /* Set up an I/O handler for the fd supplied by the backend */
+
+ logf(LOG_DEBUG, " establishing handler for result");
+ req->state = REQUEST_PENDING;
+ if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
+ abort();
+ iochan_setdata(chan, assoc);
+ retval = 0;
+ }
+ return retval;
}
-static int process_initRequest(IOCHAN client, Z_InitRequest *req)
+/*
+ * Handle message from the backend.
+ */
+void backend_response(IOCHAN i, int event)
{
- Z_APDU apdu, *apdup;
- Z_InitResponse resp;
- bool_t result = 1;
- association *assoc = iochan_getdata(client);
+ association *assoc = (association *)iochan_getdata(i);
+ request *req = request_head(&assoc->incoming);
+ Z_APDU *res;
+ int fd;
+
+ logf(LOG_DEBUG, "backend_response");
+ assert(assoc && req && req->state != REQUEST_IDLE);
+ /* determine what it is we're waiting for */
+ switch (req->request->which)
+ {
+ case Z_APDU_searchRequest:
+ res = response_searchRequest(assoc, req, 0, &fd); break;
+#if 0
+ case Z_APDU_presentRequest:
+ res = response_presentRequest(assoc, req, 0, &fd); break;
+ case Z_APDU_scanRequest:
+ res = response_scanRequest(assoc, req, 0, &fd); break;
+#endif
+ default:
+ logf(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");
+ 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");
+ iochan_setfd(i, fd); /* in case fd has changed */
+ }
+}
+
+/*
+ * Encode response, and transfer the request structure to the outgoing queue.
+ */
+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))
+ {
+ logf(LOG_WARN, "ODR error when encoding response: %s",
+ odr_errmsg(odr_geterror(assoc->decode)));
+ odr_reset(assoc->encode);
+ return -1;
+ }
+ req->response = odr_getbuf(assoc->encode, &req->len_response,
+ &req->size_response);
+ odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
+ odr_reset(assoc->encode);
+ if (assoc->print && !z_APDU(assoc->print, &res, 0))
+ {
+ logf(LOG_WARN, "ODR print error: %s",
+ odr_errmsg(odr_geterror(assoc->print)));
+ odr_reset(assoc->print);
+ }
+ req->state = REQUEST_IDLE;
+ request_enq(&assoc->outgoing, req);
+ /* turn the work over to the ir_session handler */
+ iochan_setflag(assoc->client_chan, 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");
+ iochan_setevent(assoc->client_chan, EVENT_WORK);
+ }
+#endif
+ return 0;
+}
+
+/*
+ * Handle init request.
+ * At the moment, we don't check the options
+ * anywhere else in the code - we just try not to do anything that would
+ * break a naive client. We'll toss 'em into the association block when
+ * we need them there.
+ */
+static Z_APDU *process_initRequest(association *assoc, request *reqb)
+{
+ 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];
- 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.stream = assoc->encode;
binitreq.configname = "default-config";
- if (!(binitres = bend_init(&binitreq)) || binitres->errcode)
+ binitreq.auth = req->idAuthentication;
+ binitreq.bend_sort = NULL;
+ binitreq.bend_search = NULL;
+ binitreq.bend_present = NULL;
+ binitreq.bend_esrequest = NULL;
+ if (!(binitres = bend_init(&binitreq)))
{
- fprintf(stderr, "Bad response from backend\n");
- return -1;
+ logf(LOG_WARN, "Bad response from backend.");
+ return 0;
}
- 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;
+ 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");
+
+ resp->referenceId = req->referenceId;
+ *options = '\0';
+ /* let's tell the client what we can do */
+ if (ODR_MASK_GET(req->options, Z_Options_search))
+ {
+ ODR_MASK_SET(resp->options, Z_Options_search);
+ strcat(options, "srch");
+ }
+ if (ODR_MASK_GET(req->options, Z_Options_present))
+ {
+ ODR_MASK_SET(resp->options, Z_Options_present);
+ strcat(options, " prst");
+ }
+ if (ODR_MASK_GET(req->options, Z_Options_delSet))
+ {
+ ODR_MASK_SET(resp->options, Z_Options_delSet);
+ strcat(options, " del");
+ }
+ if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
+ binitreq.bend_esrequest)
+ {
+ ODR_MASK_SET(resp->options, Z_Options_extendedServices);
+ strcat (options, " extendedServices");
+ }
+ if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
+ {
+ ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
+ strcat(options, " namedresults");
+ }
+ if (ODR_MASK_GET(req->options, Z_Options_scan))
+ {
+ ODR_MASK_SET(resp->options, Z_Options_scan);
+ strcat(options, " scan");
+ }
+ if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
+ {
+ ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
+ strcat(options, " concurop");
+ }
+ if (ODR_MASK_GET(req->options, Z_Options_sort && binitreq.bend_sort))
+ {
+ ODR_MASK_SET(resp->options, Z_Options_sort);
+ strcat(options, " sort");
+ }
+ if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
+ {
+ ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
+ assoc->version = 2; /* 1 & 2 are equivalent */
+ }
+ if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
+ {
+ ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
+ assoc->version = 2;
+ }
+ if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
+ {
+ ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
+ assoc->version = 3;
+ }
+ logf(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
assoc->maximumRecordSize = *req->maximumRecordSize;
- if (assoc->maximumRecordSize > ENCODE_BUFFER_SIZE - 500)
- assoc->maximumRecordSize = ENCODE_BUFFER_SIZE - 500;
+ if (assoc->maximumRecordSize > control_block->maxrecordsize)
+ assoc->maximumRecordSize = control_block->maxrecordsize;
assoc->preferredMessageSize = *req->preferredMessageSize;
if (assoc->preferredMessageSize > assoc->maximumRecordSize)
assoc->preferredMessageSize = assoc->maximumRecordSize;
- resp.preferredMessageSize = &assoc->preferredMessageSize;
- resp.maximumRecordSize = &assoc->maximumRecordSize;
- resp.result = &result;
- resp.implementationId = "YAZ";
- resp.implementationName = "YAZ/Simple asynchronous test server";
- resp.implementationVersion = "$Revision: 1.3 $";
- resp.userInformationField = 0;
- if (!z_APDU(assoc->encode, &apdup, 0))
- {
- odr_perror(assoc->encode, "Encode initres");
- return -1;
+ resp->preferredMessageSize = &assoc->preferredMessageSize;
+ resp->maximumRecordSize = &assoc->maximumRecordSize;
+ resp->implementationName = "Index Data/YAZ Generic Frontend Server";
+ if (binitres->errcode)
+ {
+ logf(LOG_LOG, "Connection rejected by backend.");
+ *resp->result = 0;
+ assoc->state = ASSOC_DEAD;
}
- odr_getbuf(assoc->encode, &assoc->encoded_len);
- iochan_setflags(client, EVENT_OUTPUT | EVENT_EXCEPT);
- return 0;
+ else
+ assoc->state = ASSOC_UP;
+ return apdu;
+}
+
+/*
+ * These functions should be merged.
+ */
+
+static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo)
+{
+#if ASN_COMPILED
+ dr->which = Z_DefaultDiagFormat_v2Addinfo;
+ dr->u.v2Addinfo = addinfo ? addinfo : "";
+#else
+ dr->which = Z_DiagForm_v2AddInfo;
+ dr->addinfo = addinfo ? addinfo : "";
+#endif
+}
+
+/*
+ * nonsurrogate diagnostic record.
+ */
+static Z_Records *diagrec(association *assoc, int error, char *addinfo)
+{
+ int oid[OID_SIZE];
+ Z_Records *rec = (Z_Records *)odr_malloc (assoc->encode, sizeof(*rec));
+ oident bib1;
+ int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
+ Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
+ Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)odr_malloc (assoc->encode, sizeof(*dr));
+
+ bib1.proto = assoc->proto;
+ bib1.oclass = CLASS_DIAGSET;
+ bib1.value = VAL_BIB1;
+
+ logf(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
+ "NULL");
+ *err = error;
+ rec->which = Z_Records_NSD;
+#if ASN_COMPILED
+ rec->u.nonSurrogateDiagnostic = dr;
+#else
+#ifdef Z_95
+ rec->u.nonSurrogateDiagnostic = drec;
+ drec->which = Z_DiagRec_defaultFormat;
+ drec->u.defaultFormat = dr;
+#else
+ rec->u.nonSurrogateDiagnostic = dr;
+#endif
+#endif
+ dr->diagnosticSetId = odr_oiddup (assoc->encode,
+ oid_ent_to_oid(&bib1, oid));
+ dr->condition = err;
+ set_addinfo (dr, addinfo);
+ return rec;
+}
+
+/*
+ * surrogate diagnostic.
+ */
+static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
+ int error, char *addinfo)
+{
+ int oid[OID_SIZE];
+ Z_NamePlusRecord *rec = (Z_NamePlusRecord *)odr_malloc (assoc->encode, sizeof(*rec));
+ int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
+ oident bib1;
+ Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
+ Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)odr_malloc (assoc->encode, sizeof(*dr));
+
+ bib1.proto = assoc->proto;
+ bib1.oclass = CLASS_DIAGSET;
+ bib1.value = VAL_BIB1;
+
+ logf(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
+ *err = error;
+ rec->databaseName = dbname;
+ rec->which = Z_NamePlusRecord_surrogateDiagnostic;
+ rec->u.surrogateDiagnostic = drec;
+ drec->which = Z_DiagRec_defaultFormat;
+ drec->u.defaultFormat = dr;
+ dr->diagnosticSetId = odr_oiddup (assoc->encode,
+ oid_ent_to_oid(&bib1, oid));
+ dr->condition = err;
+ set_addinfo (dr, addinfo);
+
+ return rec;
+}
+
+/*
+ * multiple nonsurrogate diagnostics.
+ */
+static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
+{
+ int oid[OID_SIZE];
+ Z_DiagRecs *recs = (Z_DiagRecs *)odr_malloc (assoc->encode, sizeof(*recs));
+ int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
+ oident bib1;
+ Z_DiagRec **recp = (Z_DiagRec **)odr_malloc (assoc->encode, sizeof(*recp));
+ 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);
+ bib1.proto = assoc->proto;
+ bib1.oclass = CLASS_DIAGSET;
+ bib1.value = VAL_BIB1;
+
+ *err = error;
+ recs->num_diagRecs = 1;
+ recs->diagRecs = recp;
+ recp[0] = drec;
+ drec->which = Z_DiagRec_defaultFormat;
+ drec->u.defaultFormat = rec;
+
+ rec->diagnosticSetId = odr_oiddup (assoc->encode,
+ oid_ent_to_oid(&bib1, oid));
+ rec->condition = err;
+
+#ifdef ASN_COMPILED
+ rec->which = Z_DefaultDiagFormat_v2Addinfo;
+ rec->u.v2Addinfo = addinfo ? addinfo : "";
+#else
+ rec->which = Z_DiagForm_v2AddInfo;
+ rec->addinfo = addinfo ? addinfo : "";
+#endif
+ return recs;
+}
+
+static Z_Records *pack_records(association *a, char *setname, int start,
+ int *num, Z_RecordComposition *comp,
+ int *next, int *pres, oid_value format)
+{
+ 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));
+ Z_NamePlusRecordList *reclist = (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;
+ reclist->num_records = 0;
+ reclist->records = list;
+ *pres = Z_PRES_SUCCESS;
+ *num = 0;
+ *next = 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;
+ int this_length;
+
+ /*
+ * 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.setname = setname;
+ freq.number = recno;
+ freq.comp = comp;
+ freq.format = format;
+ freq.stream = a->encode;
+ if (!(fres = bend_fetch(a->backend, &freq, 0)))
+ {
+ *pres = Z_PRES_FAILURE;
+ return diagrec(a, 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, fres->errcode, fres->errstring);
+ }
+ if (fres->len >= 0)
+ this_length = fres->len;
+ else
+ this_length = odr_total(a->encode) - total_length;
+ logf(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");
+ *pres = Z_PRES_PARTIAL_2;
+ break;
+ }
+ /* record can only be fetched by itself */
+ if (this_length < a->maximumRecordSize)
+ {
+ logf(LOG_DEBUG, " Record > prefmsgsz");
+ if (toget > 1)
+ {
+ logf(LOG_DEBUG, " Dropped it");
+ reclist->records[reclist->num_records] =
+ surrogatediagrec(a, fres->basename, 16, 0);
+ reclist->num_records++;
+ *next = fres->last_in_set ? 0 : recno + 1;
+ dumped_records += this_length;
+ continue;
+ }
+ }
+ else /* too big entirely */
+ {
+ logf(LOG_DEBUG, "Record > maxrcdsz");
+ reclist->records[reclist->num_records] =
+ surrogatediagrec(a, fres->basename, 17, 0);
+ reclist->num_records++;
+ *next = fres->last_in_set ? 0 : recno + 1;
+ dumped_records += this_length;
+ continue;
+ }
+ }
+ if (!(thisrec = (Z_NamePlusRecord *)odr_malloc(a->encode, sizeof(*thisrec))))
+ return 0;
+ if (!(thisrec->databaseName = (char *)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 = (Z_External *)odr_malloc(a->encode,
+ sizeof(Z_DatabaseRecord))))
+ return 0;
+ recform.proto = a->proto;
+ recform.oclass = CLASS_RECSYN;
+ recform.value = fres->format;
+ thisext->direct_reference = odr_oiddup(a->encode,
+ oid_ent_to_oid(&recform, oid));
+ thisext->indirect_reference = 0;
+ thisext->descriptor = 0;
+ if (fres->len < 0) /* Structured data */
+ {
+ switch (fres->format)
+ {
+ case VAL_SUTRS: thisext->which = Z_External_sutrs; break;
+ case VAL_GRS1: thisext->which = Z_External_grs1; break;
+ case VAL_EXPLAIN: thisext->which = Z_External_explainRecord;
+ break;
+ case VAL_SUMMARY: thisext->which = Z_External_summary; break;
+ case VAL_OPAC: thisext->which = Z_External_OPAC; break;
+
+ default:
+ logf(LOG_FATAL, "Unknown structured format from backend.");
+ return 0;
+ }
+
+ /*
+ * We cheat on the pointers here. Obviously, the record field
+ * of the backend-fetch structure should have been a union for
+ * correctness, but we're stuck with this for backwards
+ * compatibility.
+ */
+ thisext->u.grs1 = (Z_GenericRecord*) fres->record;
+ }
+ else if (fres->format == VAL_SUTRS) /* SUTRS is a single-ASN.1-type */
+ {
+#if 0
+ Z_SUTRS *sutrs = (Z_SUTRS *)odr_malloc(a->encode, 1+fres->len);
+
+ memcpy(sutrs, fres->record, fres->len);
+ sutrs[fres->len] = '\0';
+#else
+ Odr_oct *sutrs = (Odr_oct *)odr_malloc(a->encode, sizeof(*sutrs));
+
+ thisext->which = Z_External_sutrs;
+ thisext->u.sutrs = sutrs;
+ sutrs->buf = (unsigned char *)odr_malloc(a->encode, fres->len);
+ sutrs->len = sutrs->size = fres->len;
+ memcpy(sutrs->buf, fres->record, fres->len);
+#endif
+ }
+ else /* octet-aligned record. */
+ {
+ thisext->which = Z_External_octet;
+ if (!(thisext->u.octet_aligned = (Odr_oct *)odr_malloc(a->encode,
+ sizeof(Odr_oct))))
+ return 0;
+ if (!(thisext->u.octet_aligned->buf = (unsigned char *)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++;
+ *next = fres->last_in_set ? 0 : recno + 1;
+ }
+ *num = reclist->num_records;
+ return records;
}
-static Z_Records *diagrec(int error, char *addinfo)
+static Z_APDU *process_searchRequest(association *assoc, request *reqb,
+ int *fd)
{
- static Z_Records rec;
- static Odr_oid bib1[] = { 1, 2, 3, 4, 5, -1 };
- static Z_DiagRec dr;
- static int err;
-
- fprintf(stderr, "Diagnostic: %d -- %s\n", error, addinfo);
- err = error;
- rec.which = Z_Records_NSD;
- rec.u.nonSurrogateDiagnostic = &dr;
- dr.diagnosticSetId = bib1;
- dr.condition = &err;
- dr.addinfo = addinfo;
- return &rec;
+ Z_SearchRequest *req = reqb->request->u.searchRequest;
+ bend_search_rr *bsrr = (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
+
+ logf(LOG_LOG, "Got SearchRequest.");
+ save_referenceId (reqb, req->referenceId);
+ /* store ref id in request */
+ bsrr->fd = fd;
+ bsrr->request = reqb;
+ bsrr->association = assoc;
+ if (assoc->bend_search)
+ {
+ bsrr->setname = req->resultSetName;
+ bsrr->replace_set = *req->replaceIndicator;
+ bsrr->num_bases = req->num_databaseNames;
+ bsrr->basenames = req->databaseNames;
+ bsrr->query = req->query;
+ bsrr->stream = assoc->encode;
+ bsrr->errcode = 0;
+ bsrr->hits = 0;
+ bsrr->errstring = NULL;
+ ((int (*)(void *, bend_search_rr *))(assoc->bend_search))(assoc->backend, bsrr);
+ if (!bsrr->request)
+ return 0;
+ }
+ else
+ {
+ bend_searchrequest bsrq;
+ bend_searchresult *bsrt;
+
+ bsrq.setname = req->resultSetName;
+ bsrq.replace_set = *req->replaceIndicator;
+ bsrq.num_bases = req->num_databaseNames;
+ bsrq.basenames = req->databaseNames;
+ bsrq.query = req->query;
+ bsrq.stream = assoc->encode;
+ if (!(bsrt = bend_search(assoc->backend, &bsrq, fd)))
+ return 0;
+ bsrr->hits = bsrt->hits;
+ bsrr->errcode = bsrt->errcode;
+ bsrr->errstring = bsrt->errstring;
+ }
+ return response_searchRequest(assoc, reqb, bsrr, fd);
}
-static int process_searchRequest(IOCHAN client, Z_SearchRequest *req)
+int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
+
+/*
+ * Prepare a searchresponse based on the backend results. We probably want
+ * to look at making the fetching of records nonblocking as well, but
+ * so far, we'll keep things simple.
+ * If bsrt is null, that means we're called in response to a communications
+ * event, and we'll have to get the response for ourselves.
+ */
+static Z_APDU *response_searchRequest(association *assoc, request *reqb,
+ bend_search_rr *bsrt, int *fd)
{
- Z_APDU apdu, *apdup;
- Z_SearchResponse resp;
- association *assoc = iochan_getdata(client);
- int nulint = 0;
- bool_t sr = 1;
- int nrp;
- bend_searchrequest bsrq;
- bend_searchresult *bsrt;
-
- fprintf(stderr, "Got SearchRequest.\n");
- 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;
-
- if (!(bsrt = bend_search(&bsrq)))
- return -1;
+ Z_SearchRequest *req = reqb->request->u.searchRequest;
+ Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
+ Z_SearchResponse *resp = (Z_SearchResponse *)odr_malloc (assoc->encode, sizeof(*resp));
+ int *nulint = (int *)odr_malloc (assoc->encode, sizeof(*nulint));
+ bool_t *sr = (bool_t *)odr_malloc (assoc->encode, sizeof(*sr));
+ int *next = (int *)odr_malloc (assoc->encode, sizeof(*next));
+ int *none = (int *)odr_malloc (assoc->encode, sizeof(*none));
+
+ *nulint = 0;
+ *sr = 1;
+ *next = 0;
+ *none = Z_RES_NONE;
+
+ apdu->which = Z_APDU_searchResponse;
+ apdu->u.searchResponse = resp;
+ resp->referenceId = req->referenceId;
+ resp->additionalSearchInfo = 0;
+ resp->otherInfo = 0;
+ *fd = -1;
+ if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
+ {
+ logf(LOG_FATAL, "Bad result from backend");
+ return 0;
+ }
else if (bsrt->errcode)
- resp.records = diagrec(bsrt->errcode, bsrt->errstring);
+ {
+ resp->records = diagrec(assoc, 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;
+ {
+ int *toget = (int *)odr_malloc (assoc->encode, sizeof(*toget));
+ int *presst = (int *)odr_malloc (assoc->encode, sizeof(*presst));
+ Z_RecordComposition comp, *compp = 0;
- resp.resultCount = &bsrt->hits;
- resp.numberOfRecordsReturned = &nulint;
- nrp = bsrt->hits ? 1 : 0;
- resp.nextResultSetPosition = &nrp;
- resp.searchStatus = &sr;
- resp.resultSetStatus = &sr;
- resp.presentStatus = 0;
+ *toget = 0;
+ *presst = 0;
+ resp->records = 0;
+ resp->resultCount = &bsrt->hits;
- if (!z_APDU(assoc->encode, &apdup, 0))
+ comp.which = Z_RecordComp_simple;
+ /* how many records does the user agent want, then? */
+ if (bsrt->hits <= *req->smallSetUpperBound)
+ {
+ *toget = bsrt->hits;
+ if ((comp.u.simple = req->smallSetElementSetNames))
+ compp = ∁
+ }
+ else if (bsrt->hits < *req->largeSetLowerBound)
+ {
+ *toget = *req->mediumSetPresentNumber;
+ if (*toget > bsrt->hits)
+ *toget = bsrt->hits;
+ if ((comp.u.simple = req->mediumSetElementSetNames))
+ compp = ∁
+ }
+ else
+ *toget = 0;
+
+ if (*toget && !resp->records)
+ {
+ oident *prefformat;
+ oid_value form;
+
+ if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
+ prefformat->oclass != CLASS_RECSYN)
+ form = VAL_NONE;
+ else
+ form = prefformat->value;
+ resp->records = pack_records(assoc, req->resultSetName, 1,
+ toget, compp, next, presst, form);
+ if (!resp->records)
+ return 0;
+ resp->numberOfRecordsReturned = toget;
+ resp->nextResultSetPosition = next;
+ resp->searchStatus = sr;
+ resp->resultSetStatus = 0;
+ resp->presentStatus = presst;
+ }
+ else
+ {
+ if (*resp->resultCount)
+ *next = 1;
+ resp->numberOfRecordsReturned = nulint;
+ resp->nextResultSetPosition = next;
+ resp->searchStatus = sr;
+ resp->resultSetStatus = 0;
+ resp->presentStatus = 0;
+ }
+ }
+ return apdu;
+}
+
+/*
+ * Maybe we got a little over-friendly when we designed bend_fetch to
+ * get only one record at a time. Some backends can optimise multiple-record
+ * fetches, and at any rate, there is some overhead involved in
+ * all that selecting and hopping around. Problem is, of course, that the
+ * frontend can't know ahead of time how many records it'll need to
+ * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
+ * is downright lousy as a bulk data transfer protocol.
+ *
+ * To start with, we'll do the fetching of records from the backend
+ * in one operation: To save some trips in and out of the event-handler,
+ * and to simplify the interface to pack_records. At any rate, asynch
+ * operation is more fun in operations that have an unpredictable execution
+ * speed - which is normally more true for search than for present.
+ */
+static Z_APDU *process_presentRequest(association *assoc, request *reqb,
+ int *fd)
+{
+ Z_PresentRequest *req = reqb->request->u.presentRequest;
+ oident *prefformat;
+ oid_value form;
+ Z_APDU *apdu;
+ Z_PresentResponse *resp;
+ int *presst;
+ int *next;
+ int *num;
+
+ logf(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)
{
- odr_perror(assoc->encode, "Encode searchres");
- return -1;
+ bend_present_rr *bprr = (bend_present_rr *)nmem_malloc (reqb->request_mem, sizeof(*bprr));
+ bprr->setname = req->resultSetId;
+ bprr->start = *req->resultSetStartPoint;
+ bprr->number = *req->numberOfRecordsRequested;
+ bprr->format = form;
+ bprr->comp = req->recordComposition;
+ bprr->stream = assoc->encode;
+ bprr->request = reqb;
+ bprr->association = assoc;
+ bprr->errcode = 0;
+ bprr->errstring = NULL;
+ ((int (*)(void *, bend_present_rr *))(*assoc->bend_present))(assoc->backend, bprr);
+
+ if (!bprr->request)
+ return 0;
}
- odr_getbuf(assoc->encode, &assoc->encoded_len);
- iochan_setflags(client, EVENT_OUTPUT | EVENT_EXCEPT);
- return 0;
+ apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
+ resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
+ presst = (int *)odr_malloc (assoc->encode, sizeof(*presst));
+ next = (int *)odr_malloc (assoc->encode, sizeof(*next));
+ num = (int *)odr_malloc (assoc->encode, sizeof(*num));
+ *presst = 0;
+ *next = 0;
+ *num = *req->numberOfRecordsRequested;
+
+ apdu->which = Z_APDU_presentResponse;
+ apdu->u.presentResponse = resp;
+ resp->referenceId = req->referenceId;
+ resp->otherInfo = 0;
+
+ resp->records =
+ pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
+ num, req->recordComposition, next, presst, form);
+ if (!resp->records)
+ return 0;
+ resp->numberOfRecordsReturned = num;
+ resp->presentStatus = presst;
+ resp->nextResultSetPosition = next;
+
+ return apdu;
+}
+
+/*
+ * 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.
+ */
+static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
+{
+ Z_ScanRequest *req = reqb->request->u.scanRequest;
+ Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
+ Z_ScanResponse *res = (Z_ScanResponse *)odr_malloc (assoc->encode, sizeof(*res));
+ int *scanStatus = (int *)odr_malloc (assoc->encode, sizeof(*scanStatus));
+ int *numberOfEntriesReturned =
+ (int *)odr_malloc (assoc->encode, sizeof(*numberOfEntriesReturned));
+ Z_ListEntries *ents = (Z_ListEntries *)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");
+ *scanStatus = Z_Scan_failure;
+ *numberOfEntriesReturned = 0;
+
+ 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;
+#if ASN_COMPILED
+ ents->num_entries = 0;
+ ents->entries = NULL;
+ ents->num_nonsurrogateDiagnostics = 0;
+ ents->nonsurrogateDiagnostics = NULL;
+#else
+ ents->which = Z_ListEntries_entries;
+#endif
+ res->attributeSet = 0;
+ res->otherInfo = 0;
+
+ if (req->attributeSet && (!(attent = oid_getentbyoid(req->attributeSet)) ||
+ attent->oclass != CLASS_ATTSET
+ || attent->value != VAL_BIB1))
+ diagrecs_p = diagrecs(assoc, 121, 0);
+ else if (req->stepSize && *req->stepSize > 0)
+ diagrecs_p = diagrecs(assoc, 205, 0);
+ else
+ {
+ if (req->termListAndStartPoint->term->which == Z_Term_general)
+ logf(LOG_DEBUG, " term: '%.*s'",
+ req->termListAndStartPoint->term->u.general->len,
+ req->termListAndStartPoint->term->u.general->buf);
+ srq.num_bases = req->num_databaseNames;
+ srq.basenames = req->databaseNames;
+ srq.num_entries = *req->numberOfTermsRequested;
+ srq.term = req->termListAndStartPoint;
+ srq.stream = assoc->encode;
+ if (!(attset = oid_getentbyoid(req->attributeSet)) ||
+ attset->oclass != CLASS_RECSYN)
+ srq.attributeset = VAL_NONE;
+ else
+ srq.attributeset = attset->value;
+ srq.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);
+ else
+ {
+ int i;
+#ifdef ASN_COMPILED
+#else
+ Z_Entries *list = (Z_Entries *)
+ odr_malloc (assoc->encode, sizeof(*list));
+#endif
+ Z_Entry **tab = (Z_Entry **)
+ odr_malloc (assoc->encode, sizeof(*tab) * srs->num_entries);
+
+ if (srs->status == BEND_SCAN_PARTIAL)
+ *scanStatus = Z_Scan_partial_5;
+ else
+ *scanStatus = Z_Scan_success;
+#ifdef ASN_COMPILED
+ ents->entries = tab;
+ ents->num_entries = srs->num_entries;
+ res->numberOfEntriesReturned = &ents->num_entries;
+#else
+ ents->u.entries = list;
+ list->entries = tab;
+ list->num_entries = srs->num_entries;
+ res->numberOfEntriesReturned = &list->num_entries;
+#endif
+ res->positionOfTerm = &srs->term_position;
+ for (i = 0; i < srs->num_entries; i++)
+ {
+ Z_Entry *e;
+ Z_TermInfo *t;
+ Odr_oct *o;
+
+ tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
+ e->which = Z_Entry_termInfo;
+ e->u.termInfo = t = (Z_TermInfo *)odr_malloc(assoc->encode, sizeof(*t));
+ t->suggestedAttributes = 0;
+ t->displayTerm = 0;
+ t->alternativeTerm = 0;
+ t->byAttributes = 0;
+ t->otherTermInfo = 0;
+ t->globalOccurrences = &srs->entries[i].occurrences;
+ t->term = (Z_Term *)odr_malloc(assoc->encode, sizeof(*t->term));
+ t->term->which = Z_Term_general;
+ t->term->u.general = o = (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);
+ }
+ }
+ }
+ if (diagrecs_p)
+ {
+#ifdef ASN_COMPILED
+ ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
+ ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
+#else
+ ents->u.nonSurrogateDiagnostics = diagrecs_p;
+ ents->which = Z_ListEntries_nonSurrogateDiagnostics;
+#endif
+ }
+ return apdu;
}
-static int process_presentRequest(IOCHAN client, Z_PresentRequest *req)
+static Z_APDU *process_sortRequest(association *assoc, request *reqb,
+ int *fd)
{
- Z_APDU apdu, *apdup;
- Z_PresentResponse resp;
- association *assoc = iochan_getdata(client);
- int nrr = 1;
+ Z_SortRequest *req = reqb->request->u.sortRequest;
+ Z_SortResponse *res = (Z_SortResponse *)odr_malloc (assoc->encode, sizeof(*res));
+ bend_sort_rr *bsrr = (bend_sort_rr *)odr_malloc (assoc->encode, sizeof(*bsrr));
- fprintf(stderr, "Got PresentRequest.\n");
- apdup = &apdu;
- apdu.which = Z_APDU_presentResponse;
- apdu.u.presentResponse = &resp;
- resp.referenceId = req->referenceId;
+ Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
- resp.numberOfRecordsReturned = &nrr;
- resp.nextResultSetPosition = &nrr;
- resp.presentStatus = &nrr;
+ logf(LOG_LOG, "Got SortRequest.");
- resp.records = diagrec(1, "No records yet.");
+#ifdef ASN_COMPILED
+ bsrr->num_input_setnames = req->num_inputResultSetNames;
+ bsrr->input_setnames = req->inputResultSetNames;
+#else
+ bsrr->num_input_setnames = req->inputResultSetNames->num_strings;
+ bsrr->input_setnames = req->inputResultSetNames->strings;
+#endif
+ bsrr->output_setname = req->sortedResultSetName;
+ bsrr->sort_sequence = req->sortSequence;
+ bsrr->stream = assoc->encode;
- if (!z_APDU(assoc->encode, &apdup, 0))
+ bsrr->sort_status = Z_SortStatus_failure;
+ bsrr->errcode = 0;
+ bsrr->errstring = 0;
+
+ ((int (*)(void *, bend_sort_rr *))(*assoc->bend_sort))(assoc->backend, bsrr);
+
+ res->referenceId = req->referenceId;
+ res->sortStatus = (int *)odr_malloc (assoc->encode, sizeof(*res->sortStatus));
+ *res->sortStatus = bsrr->sort_status;
+ res->resultSetStatus = 0;
+ if (bsrr->errcode)
{
- odr_perror(assoc->encode, "Encode presentres");
- return -1;
+ Z_DiagRecs *dr = diagrecs (assoc, bsrr->errcode, bsrr->errstring);
+#ifdef ASN_COMPILED
+ res->diagnostics = dr->diagRecs;
+ res->num_diagnostics = dr->num_diagRecs;
+#else
+ res->diagnostics = dr;
+#endif
}
- odr_getbuf(assoc->encode, &assoc->encoded_len);
- iochan_setflags(client, EVENT_OUTPUT | EVENT_EXCEPT);
- return 0;
+ else
+ {
+#ifdef ASN_COMPILED
+ res->num_diagnostics = 0;
+#endif
+ res->diagnostics = 0;
+ }
+ res->otherInfo = 0;
+
+ apdu->which = Z_APDU_sortResponse;
+ apdu->u.sortResponse = res;
+ return apdu;
}
+
+static void process_close(association *assoc, request *reqb)
+{
+ Z_Close *req = reqb->request->u.close;
+ static char *reasons[] =
+ {
+ "finished",
+ "shutdown",
+ "systemProblem",
+ "costLimit",
+ "resources",
+ "securityViolation",
+ "protocolError",
+ "lackOfActivity",
+ "peerAbort",
+ "unspecified"
+ };
+
+ logf(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 */
+ assoc->version = 3;
+ do_close(assoc, Z_Close_finished, "Association terminated by client");
+}
+
+void save_referenceId (request *reqb, Z_ReferenceId *refid)
+{
+ if (refid)
+ {
+ reqb->len_refid = refid->len;
+ reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
+ memcpy (reqb->refid, refid->buf, refid->len);
+ }
+ else
+ {
+ reqb->len_refid = 0;
+ reqb->refid = NULL;
+ }
+}
+
+void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
+{
+ process_response (a, req, res);
+}
+
+bend_request bend_request_mk (bend_association a)
+{
+ request *nreq = request_get (&a->outgoing);
+ nreq->request_mem = nmem_create ();
+ return nreq;
+}
+
+Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
+{
+ Z_ReferenceId *id;
+ if (!req->refid)
+ return 0;
+ id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
+ id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
+ id->len = id->size = req->len_refid;
+ memcpy (id->buf, req->refid, req->len_refid);
+ return id;
+}
+
+void bend_request_destroy (bend_request *req)
+{
+ nmem_destroy((*req)->request_mem);
+ request_release(*req);
+ *req = NULL;
+}
+
+int bend_backend_respond (bend_association a, bend_request req)
+{
+ return process_request (a, req);
+}
+
+void bend_request_setdata(bend_request r, void *p)
+{
+ r->clientData = p;
+}
+
+void *bend_request_getdata(bend_request r)
+{
+ return r->clientData;
+}
+
+/* Chas: Added in from DALI */
+static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
+{
+ bend_esrequest_rr esrequest;
+
+ Z_ExtendedServicesRequest *req = reqb->request->u.extendedServicesRequest;
+ Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
+
+ Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
+
+ logf(LOG_DEBUG,"inside Process esRequest");
+
+ esrequest.esr = reqb->request->u.extendedServicesRequest;
+ esrequest.stream = assoc->encode;
+ esrequest.errcode = 0;
+ esrequest.errstring = NULL;
+ esrequest.request = reqb;
+ esrequest.association = assoc;
+
+ (*assoc->bend_esrequest)(assoc->backend, &esrequest, fd);
+
+ /* If the response is being delayed, return NULL */
+ if (esrequest.request == NULL)
+ return(NULL);
+
+ resp->referenceId = req->referenceId;
+
+ if ( esrequest.errcode == 0 )
+ {
+ /* Backend service indicates request will be processed */
+ logf(LOG_DEBUG,"Request will be processed...Good !");
+ *resp->operationStatus = Z_ExtendedServicesResponse_done;
+ }
+ else
+ {
+ /* Backend indicates error, request will not be processed */
+ logf(LOG_DEBUG,"Request will not be processed...BAD !");
+ *resp->operationStatus = Z_ExtendedServicesResponse_failure;
+ }
+ /* Do something with the members of bend_extendedservice */
+
+ logf(LOG_DEBUG,"Send the result apdu");
+
+ return apdu;
+}
+
+/* Chas: End of addition from DALI */