2 * Copyright (c) 1995, the EUROPAGATE consortium (see below).
4 * The EUROPAGATE consortium members are:
6 * University College Dublin
7 * Danmarks Teknologiske Videnscenter
8 * An Chomhairle Leabharlanna
9 * Consejo Superior de Investigaciones Cientificas
11 * Permission to use, copy, modify, distribute, and sell this software and
12 * its documentation, in whole or in part, for any purpose, is hereby granted,
15 * 1. This copyright and permission notice appear in all copies of the
16 * software and its documentation. Notices of copyright or attribution
17 * which appear at the beginning of any file must remain unchanged.
19 * 2. The names of EUROPAGATE or the project partners may not be used to
20 * endorse or promote products derived from this software without specific
21 * prior written permission.
23 * 3. Users of this software (implementors and gateway operators) agree to
24 * inform the EUROPAGATE consortium of their use of the software. This
25 * information will be used to evaluate the EUROPAGATE project and the
26 * software, and to plan further developments. The consortium may use
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29 * 4. Users of this software agree to make their best efforts, when
30 * documenting their use of the software, to acknowledge the EUROPAGATE
31 * consortium, and the role played by the software in their work.
33 * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
34 * EXPRESS, IMPLIED, OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
35 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
36 * IN NO EVENT SHALL THE EUROPAGATE CONSORTIUM OR ITS MEMBERS BE LIABLE
37 * FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF
38 * ANY KIND, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
39 * OR PROFITS, WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND
40 * ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
41 * USE OR PERFORMANCE OF THIS SOFTWARE.
47 * Z39.50 API for the Email gateway
50 * Revision 1.3 1995/07/05 11:09:06 adam
51 * Bug fix in zass_openresult.
53 * Revision 1.2 1995/07/05 10:20:44 adam
54 * Edited ZDist zlayer to use new API.
56 * Revision 1.1 1995/07/03 08:21:43 adam
57 * Zdist layer moved to new sub directory.
59 * Revision 1.17 1995/05/16 09:41:47 adam
60 * LICENSE. Uses new versions of odr_{set,get}buf.
62 * Revision 1.16 1995/04/20 15:25:34 quinn
65 * Revision 1.15 1995/04/17 11:26:55 quinn
66 * Added YAZ version of zaccess
68 * Revision 1.14 1995/02/23 08:32:26 adam
71 * Revision 1.12 1995/02/20 20:35:37 quinn
72 * Pull present status from presresp.
74 * Revision 1.11 1995/02/20 18:58:05 quinn
75 * Added hack for record in ANY
77 * Revision 1.10 1995/02/20 18:19:30 quinn
78 * More relaxed about record types.
80 * Revision 1.9 1995/02/17 15:17:51 quinn
83 * Revision 1.8 1995/02/17 14:48:41 quinn
84 * 'nother bug in present
86 * Revision 1.7 1995/02/17 14:42:21 quinn
87 * Trivial bug in fetch-loop.
89 * Revision 1.6 1995/02/17 14:41:22 quinn
92 * Revision 1.5 1995/02/17 13:58:01 quinn
93 * First kick at present handling
95 * Revision 1.4 1995/02/16 15:33:45 quinn
96 * Fixed bug in KWAQS generator
98 * Revision 1.3 1995/02/16 15:20:45 quinn
99 * Added initialization of response from search
101 * Revision 1.2 1995/02/16 15:14:53 quinn
102 * Fixed KWAQS-generator
104 * Revision 1.1 1995/02/16 14:47:55 quinn
110 * Interface to the Z39.50 toolkit. Primary function is to hide Zdist, or
111 * whatever lower-layer we decide to use later. The decision to add a
112 * layer atop the toolkit was twofold: It vastly simplifies the
113 * implementation of the protocol persistence, and it hides Zdist. The
114 * latter is useful after Zdist has gone and changed their fine API after
115 * we went through all the trouble of documenting it in our Design. Don't
116 * want that to happen again.
118 * For the time being at least, we'll have these routines hang (or err) if
119 * they get a WOULDBLOCK on a write. That seems safe since, under normal
120 * circumstances, the network buffers should always be able to absorb
121 * the small request packages.
128 #include <z3950sup.h>
136 struct zass /* Z-assoc */
138 NETBOXPROFILE *ass; /* ZDIST association handle */
139 int fd; /* low-level socket (for select only) */
141 int preferredmessagesize;
142 char *buf; /* intermediary buffer */
145 int rpn2kwaqs(struct ccl_rpn_node *q, char **p)
147 struct ccl_rpn_attr *i;
148 static char *ops[] = {"and", "or", "not"};
150 assert(!CCL_RPN_AND);
154 strcpy(*p, q->u.t.term);
155 (*p) += strlen(q->u.t.term);
156 if (q->u.t.attr_list)
160 for (i = q->u.t.attr_list; i; i = i->next)
162 sprintf(*p, "%d,%d%s", i->type, i->value, i->next ?
171 gw_log(GW_LOG_FATAL, ZASS_TYPE, "KWAQS Doesn't support set refs");
173 case CCL_RPN_AND: case CCL_RPN_OR: case CCL_RPN_NOT:
174 strcpy(*p, ops[q->kind]);
175 *p += strlen(ops[q->kind]);
178 if (rpn2kwaqs(q->u.p[0], p) < 0)
182 if (rpn2kwaqs(q->u.p[1], p) < 0)
188 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Unknown RPN node");
193 int zass_openresult(ZASS p, int *complete)
198 if ((len = zutil_GetBERFromNet(p->ass, (unsigned char*)p->buf,
199 p->maxrecordsize)) <= 0)
201 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to receive initresponse");
204 ires = (PINITRESPONSE) zutil_CreateFromData((unsigned char*)p->buf, len);
205 if (InitResponse_GetTag(ires) != INITRESPONSE_TAG)
207 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Expected initresponse from target");
210 gw_log(ZASS_DEBUG, ZASS_TYPE, "Got initresponse");
211 if (!InitResponse_GetResult(ires))
213 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Access to target denied.");
216 gw_log(ZASS_DEBUG, ZASS_TYPE, "Connected OK");
217 p->preferredmessagesize = InitResponse_GetPreferredMessageSize(ires);
218 p->maxrecordsize = InitResponse_GetExceptionalRecordSize(ires);
219 InitResponse_Destroy(ires);
225 ZASS zass_open(char *host, int port, int *complete, char *auth)
233 if (!(p = malloc(sizeof(*p))))
235 gw_log(GW_LOG_FATAL, ZASS_TYPE, "memory alloc failed");
238 p->maxrecordsize = ZASS_MAXRECORDSIZE;
239 p->preferredmessagesize = ZASS_PREFERREDMESSAGESIZE;
240 if (!(p->buf = malloc(ZASS_MAXRECORDSIZE + 100)))
242 gw_log(GW_LOG_FATAL, ZASS_TYPE, "alloc zass-buffer");
245 if (!(p->ass = NEWSTRUCT(NETBOXPROFILE)))
247 gw_log(GW_LOG_FATAL, ZASS_TYPE, "memory alloc failed");
250 p->ass->TimeOutSec = 120;
251 p->ass->TimeOutUSec = 0;
252 strcpy(p->ass->HostName, host);
255 if (netbox_Open(p->ass) != 1)
257 gw_log(GW_LOG_WARN, ZASS_TYPE, "netbox_Open failed");
260 gw_log(ZASS_DEBUG, ZASS_TYPE, "Opened connection to %s:%d",
261 p->ass->HostName, p->ass->Port);
262 sprintf(name, "%s (ZDIST protocol layer)", ZASS_NAME);
263 ireq = InitRequest_CreateInitAllASCII(0, "yy", "yy", p->maxrecordsize,
264 p->preferredmessagesize, ZASS_ID, name, ZASS_VERSION, 0);
267 gw_log(GW_LOG_FATAL, "ZASS_TYPE", "failed to create initrequest");
270 zutil_GetBEREncodedBuffer(ireq, (unsigned char*)p->buf, &len,
274 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to encode initrequest");
277 InitRequest_Destroy(ireq);
278 if (netbox_SendBuffer(p->ass, p->buf, len) != len)
280 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to send initrequest");
283 gw_log(ZASS_DEBUG, ZASS_TYPE, "Sent initrequest.");
285 if (zass_openresult(p, complete) < 0 && (!complete || *complete))
292 const struct zass_searchent *zass_search(ZASS a, struct ccl_rpn_node *query,
293 char *resname, char *databases, int *complete)
295 static struct zass_searchent r;
297 DATA_DIR *pdu, *record;
301 if (rpn2kwaqs(query, &p) < 0)
303 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to encode query");
306 gw_log(ZASS_DEBUG, ZASS_TYPE, "Query: KWAQS: '%s'", kwaqs);
307 pdu = SearchRequest_CreateInitAllASCII(0, 0, 2, 0, 1, resname, databases,
308 0, 0, 0, kwaqs, BIB1_OID);
311 gw_log(GW_LOG_FATAL, "ZASS_TYPE", "failed to create searchrequest");
314 zutil_GetBEREncodedBuffer(pdu, (unsigned char*)a->buf, &len,
318 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to encode initrequest");
321 SearchRequest_Destroy(pdu);
322 if (netbox_SendBuffer(a->ass, a->buf, len) != len)
324 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to send initrequest");
327 gw_log(ZASS_DEBUG, ZASS_TYPE, "Sent searchrequest.");
328 if ((len = zutil_GetBERFromNet(a->ass, (unsigned char*)a->buf,
329 a->maxrecordsize)) <= 0)
331 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to receive searchresponse");
334 pdu = zutil_CreateFromData((unsigned char*)a->buf, len);
335 if (zutil_GetTag(pdu) != SEARCHRESPONSE_TAG)
337 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Expected serchresponse from target");
340 gw_log(ZASS_DEBUG, ZASS_TYPE, "Got searchresponse");
341 r.status = SearchResponse_GetSearchStatus(pdu);
342 r.num = SearchResponse_GetResultCount(pdu);
343 r.status = SearchResponse_GetResultSetStatus(pdu);
346 if ((record = SearchResponse_GetRecords(pdu)))
348 if (zutil_GetTag(record) == NONSURROGATEDIAGNOSTIC_TAG)
352 r.errcode = zutil_GetTaggedInt(record, ASN1_INTEGER);
353 if ((ad = zutil_GetTaggedObject(record, ASN1_VISIBLESTRING)))
357 if ((s = OctetString_GetASCIIString(ad)))
359 strcpy(r.errstring, s);
365 gw_log(GW_LOG_WARN, ZASS_TYPE, "Got real record in SRCHRESP");
367 SearchResponse_Destroy(pdu);
373 * Triple indirection - that's kinda heavy. We'll fix it later.
374 * There are worse things around, though. Like ZDist.
376 void get_diagrec(zass_record ***p, DATA_DIR *rec)
380 **p = malloc(sizeof(***p));
382 (**p)->errcode = zutil_GetTaggedInt(rec, ASN1_INTEGER);
383 if ((ad = zutil_GetTaggedObject(rec, ASN1_VISIBLESTRING)))
387 if ((s = OctetString_GetASCIIString(ad)))
389 strcpy((**p)->errstring, s);
393 (**p)->which = ZASS_REC_DIAG;
397 void get_responserecords(zass_record ***p, DATA_DIR *rec)
399 int num, recsyntaxlen, i;
400 DATA_DIR *record, *retrec, *align;
402 POBJECTIDENTIFIER oid;
405 num = ResponseRecords_GetCount(rec);
406 for (i = 1; i <= num; i++)
408 record = ResponseRecords_GetRecord(rec, i);
411 gw_log(GW_LOG_WARN, ZASS_TYPE, "Failed to get record.");
414 retrec = NamePlusRecord_GetRetrievalRecord(record);
417 /* check if it's a diagrec */
418 if (record->ptr.child->fldid == 2)
419 get_diagrec(p, record->ptr.child);
422 gw_log(GW_LOG_WARN, ZASS_TYPE, "Illegal record.");
426 ext = RetrievalRecord_GetExternal(retrec);
429 gw_log(GW_LOG_WARN, ZASS_TYPE, "No external in record");
432 oid = External_GetDirectReference(ext);
435 gw_log(GW_LOG_WARN, ZASS_TYPE, "Unknown record type.");
438 recsyntaxlen = DirectReference_GetLength(oid);
439 memcpy(recsyntax, DirectReference_GetData(oid), recsyntaxlen);
440 recsyntax[recsyntaxlen] = '\0';
441 **p = malloc(sizeof(***p));
443 if (!strcmp(recsyntax, USMARC_OID))
444 (**p)->which = ZASS_REC_USMARC;
447 gw_log(GW_LOG_WARN, ZASS_TYPE, "ZLAYER only knows USMARC at this point.");
448 gw_log(GW_LOG_WARN, ZASS_TYPE, "Type was '%d'", (**p)->which);
450 align = External_GetEncodingAligned(ext);
453 gw_log(GW_LOG_WARN, ZASS_TYPE, "Record wasn't octet-aligned");
454 align = External_GetEncodingSingle(ext);
457 gw_log(GW_LOG_WARN, ZASS_TYPE, "Record wasn't ANY");
460 align = align->ptr.child;
462 if (!((**p)->record = malloc(align->count + 1)))
464 gw_log(GW_LOG_FATAL, ZASS_TYPE, "malloc");
467 memcpy((**p)->record, align->ptr.data, align->count);
468 (**p)->record[align->count] = '\0';
469 gw_log(ZASS_DEBUG, ZASS_TYPE, "Got a record of %d bytes",
476 static void zass_records_free(zass_record *p)
481 * Note that 1== first record.
483 const struct zass_presentent *zass_present(ZASS a, char *resname, int start,
484 int num, int *complete)
486 static struct zass_presentent r = {0, 0, 0, 0};
487 zass_record **rec = &r.records;
494 zass_records_free(r.records);
499 gw_log(ZASS_DEBUG, ZASS_TYPE, "Fetching %d records from # %d", num - r.num,
501 pdu = PresentRequest_CreateInitAllASCII(0, resname, start, num - r.num, "F",
505 gw_log(GW_LOG_FATAL, "ZASS_TYPE", "failed to create presentrequest");
508 zutil_GetBEREncodedBuffer(pdu, (unsigned char*)a->buf, &len,
512 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to encode presentrequest");
515 PresentRequest_Destroy(pdu);
516 if (netbox_SendBuffer(a->ass, a->buf, len) != len)
518 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to send presentrequest");
521 gw_log(ZASS_DEBUG, ZASS_TYPE, "Sent presentrequest.");
522 if ((len = zutil_GetBERFromNet(a->ass, (unsigned char*)a->buf,
523 a->maxrecordsize)) <= 0)
525 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Failed to receive presentresponse");
528 pdu = zutil_CreateFromData((unsigned char*)a->buf, len);
529 if (zutil_GetTag(pdu) != PRESENTRESPONSE_TAG)
531 gw_log(GW_LOG_FATAL, ZASS_TYPE, "Expected presentresponse from target");
534 gw_log(ZASS_DEBUG, ZASS_TYPE, "Got presentresponse");
535 r.num += PresentResponse_GetNumberOfRecordsReturned(pdu);
536 r.presentstatus = PresentResponse_GetPresentStatus(pdu);
539 gw_log(GW_LOG_WARN, ZASS_TYPE, "Got 0 records from target.");
542 r.nextpos = PresentResponse_GetNextResultSetPosition(pdu);
544 switch(PresentResponse_GetRecordType(pdu))
546 case RESPONSERECORDS_TAG:
547 get_responserecords(&rec, PresentResponse_GetResponseRecords(pdu));
549 case NONSURROGATEDIAGNOSTIC_TAG:
550 get_diagrec(&rec, PresentResponse_GetNonSurrogateDiagnostic(pdu));
553 gw_log(GW_LOG_WARN, ZASS_TYPE, "Bad tag in response rec.");
555 PresentResponse_Destroy(pdu);
557 while (num - r.num && start);