Fixes for gcc warnings - mostly WRT check of returns values
[yaz-moved-to-github.git] / src / seshigh.c
1 /* This file is part of the YAZ toolkit.
2  * Copyright (C) 1995-2008 Index Data
3  * See the file LICENSE for details.
4  */
5 /**
6  * \file seshigh.c
7  * \brief Implements GFS session logic.
8  *
9  * Frontend server logic.
10  *
11  * This code receives incoming APDUs, and handles client requests by means
12  * of the backend API.
13  *
14  * Some of the code is getting quite involved, compared to simpler servers -
15  * primarily because it is asynchronous both in the communication with
16  * the user and the backend. We think the complexity will pay off in
17  * the form of greater flexibility when more asynchronous facilities
18  * are implemented.
19  *
20  * Memory management has become somewhat involved. In the simple case, where
21  * only one PDU is pending at a time, it will simply reuse the same memory,
22  * once it has found its working size. When we enable multiple concurrent
23  * operations, perhaps even with multiple parallel calls to the backend, it
24  * will maintain a pool of buffers for encoding and decoding, trying to
25  * minimize memory allocation/deallocation during normal operation.
26  *
27  */
28
29 #include <stdlib.h>
30 #include <stdio.h>
31 #include <assert.h>
32 #include <ctype.h>
33
34 #if HAVE_SYS_TYPES_H
35 #include <sys/types.h>
36 #endif
37 #if HAVE_SYS_STAT_H
38 #include <sys/stat.h>
39 #endif
40
41 #ifdef WIN32
42 #include <io.h>
43 #define S_ISREG(x) (x & _S_IFREG)
44 #include <process.h>
45 #endif
46
47 #if HAVE_UNISTD_H
48 #include <unistd.h>
49 #endif
50
51 #if YAZ_HAVE_XML2
52 #include <libxml/parser.h>
53 #include <libxml/tree.h>
54 #endif
55
56 #include <yaz/yconfig.h>
57 #include <yaz/xmalloc.h>
58 #include <yaz/comstack.h>
59 #include "eventl.h"
60 #include "session.h"
61 #include "mime.h"
62 #include <yaz/proto.h>
63 #include <yaz/oid_db.h>
64 #include <yaz/log.h>
65 #include <yaz/logrpn.h>
66 #include <yaz/querytowrbuf.h>
67 #include <yaz/statserv.h>
68 #include <yaz/diagbib1.h>
69 #include <yaz/charneg.h>
70 #include <yaz/otherinfo.h>
71 #include <yaz/yaz-util.h>
72 #include <yaz/pquery.h>
73 #include <yaz/oid_db.h>
74
75 #include <yaz/srw.h>
76 #include <yaz/backend.h>
77 #include <yaz/yaz-ccl.h>
78
79 static void process_gdu_request(association *assoc, request *req);
80 static int process_z_request(association *assoc, request *req, char **msg);
81 void backend_response(IOCHAN i, int event);
82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
85 static Z_External *init_diagnostics(ODR odr, int errcode,
86                                     const char *errstring);
87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
88     int *fd);
89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
90     bend_search_rr *bsrr, int *fd);
91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
92     int *fd);
93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
95 static void process_close(association *assoc, request *reqb);
96 void save_referenceId(request *reqb, Z_ReferenceId *refid);
97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
98     int *fd);
99 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
100
101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
102
103 /* dynamic logging levels */
104 static int logbits_set = 0;
105 static int log_session = 0; /* one-line logs for session */
106 static int log_sessiondetail = 0; /* more detailed stuff */
107 static int log_request = 0; /* one-line logs for requests */
108 static int log_requestdetail = 0;  /* more detailed stuff */
109
110 /** get_logbits sets global loglevel bits */
111 static void get_logbits(void)
112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
113     if (!logbits_set)
114     {
115         logbits_set = 1;
116         log_session = yaz_log_module_level("session"); 
117         log_sessiondetail = yaz_log_module_level("sessiondetail");
118         log_request = yaz_log_module_level("request");
119         log_requestdetail = yaz_log_module_level("requestdetail"); 
120     }
121 }
122
123
124
125 static void wr_diag(WRBUF w, int error, const char *addinfo)
126 {
127     wrbuf_printf(w, "ERROR %d+", error);
128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
129     if (addinfo){
130         wrbuf_puts(w, "+");
131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
132     }
133     
134     wrbuf_puts(w, " ");    
135 }
136
137
138 /*
139  * Create and initialize a new association-handle.
140  *  channel  : iochannel for the current line.
141  *  link     : communications channel.
142  * Returns: 0 or a new association handle.
143  */
144 association *create_association(IOCHAN channel, COMSTACK link,
145                                 const char *apdufile)
146 {
147     association *anew;
148
149     if (!logbits_set)
150         get_logbits();
151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
152         return 0;
153     anew->init = 0;
154     anew->version = 0;
155     anew->last_control = 0;
156     anew->client_chan = channel;
157     anew->client_link = link;
158     anew->cs_get_mask = 0;
159     anew->cs_put_mask = 0;
160     anew->cs_accept_mask = 0;
161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
162         !(anew->encode = odr_createmem(ODR_ENCODE)))
163         return 0;
164     if (apdufile && *apdufile)
165     {
166         FILE *f;
167
168         if (!(anew->print = odr_createmem(ODR_PRINT)))
169             return 0;
170         if (*apdufile == '@')
171         {
172             odr_setprint(anew->print, yaz_log_file());
173         }       
174         else if (*apdufile != '-')
175         {
176             char filename[256];
177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
178             if (!(f = fopen(filename, "w")))
179             {
180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
181                 return 0;
182             }
183             setvbuf(f, 0, _IONBF, 0);
184             odr_setprint(anew->print, f);
185         }
186     }
187     else
188         anew->print = 0;
189     anew->input_buffer = 0;
190     anew->input_buffer_len = 0;
191     anew->backend = 0;
192     anew->state = ASSOC_NEW;
193     request_initq(&anew->incoming);
194     request_initq(&anew->outgoing);
195     anew->proto = cs_getproto(link);
196     anew->server = 0;
197     return anew;
198 }
199
200 /*
201  * Free association and release resources.
202  */
203 void destroy_association(association *h)
204 {
205     statserv_options_block *cb = statserv_getcontrol();
206     request *req;
207
208     xfree(h->init);
209     odr_destroy(h->decode);
210     odr_destroy(h->encode);
211     if (h->print)
212         odr_destroy(h->print);
213     if (h->input_buffer)
214     xfree(h->input_buffer);
215     if (h->backend)
216         (*cb->bend_close)(h->backend);
217     while ((req = request_deq(&h->incoming)))
218         request_release(req);
219     while ((req = request_deq(&h->outgoing)))
220         request_release(req);
221     request_delq(&h->incoming);
222     request_delq(&h->outgoing);
223     xfree(h);
224     xmalloc_trav("session closed");
225     if (cb && cb->one_shot)
226     {
227         exit(0);
228     }
229 }
230
231 static void do_close_req(association *a, int reason, char *message,
232                          request *req)
233 {
234     Z_APDU apdu;
235     Z_Close *cls = zget_Close(a->encode);
236     
237     /* Purge request queue */
238     while (request_deq(&a->incoming));
239     while (request_deq(&a->outgoing));
240     if (a->version >= 3)
241     {
242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
243             reason, message ? message : "none");
244         apdu.which = Z_APDU_close;
245         apdu.u.close = cls;
246         *cls->closeReason = reason;
247         cls->diagnosticInformation = message;
248         process_z_response(a, req, &apdu);
249         iochan_settimeout(a->client_chan, 20);
250     }
251     else
252     {
253         request_release(req);
254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
256         a->cs_put_mask = 0;
257     }
258     a->state = ASSOC_DEAD;
259 }
260
261 static void do_close(association *a, int reason, char *message)
262 {
263     request *req = request_get(&a->outgoing);
264     do_close_req (a, reason, message, req);
265 }
266
267
268 int ir_read(IOCHAN h, int event)
269 {
270     association *assoc = (association *)iochan_getdata(h);
271     COMSTACK conn = assoc->client_link;
272     request *req;
273     
274     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
275     {
276         yaz_log(YLOG_DEBUG, "ir_session (input)");
277         /* We aren't speaking to this fellow */
278         if (assoc->state == ASSOC_DEAD)
279         {
280             yaz_log(log_sessiondetail, "Connection closed - end of session");
281             cs_close(conn);
282             destroy_association(assoc);
283             iochan_destroy(h);
284             return 0;
285         }
286         assoc->cs_get_mask = EVENT_INPUT;
287
288         do
289         {
290             int res = cs_get(conn, &assoc->input_buffer,
291                              &assoc->input_buffer_len);
292             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
293             {
294                 yaz_log(log_session, "Connection error: %s res=%d",
295                         cs_errmsg(cs_errno(conn)), res);
296                 req = request_get(&assoc->incoming); /* get a new request */
297                 do_close_req(assoc, Z_Close_protocolError, 
298                              "Incoming package too large", req);
299                 return 0;
300             }
301             else if (res <= 0)
302             {
303                 yaz_log(log_session, "Connection closed by client");
304                 assoc->state = ASSOC_DEAD;
305                 return 0;
306             }
307             else if (res == 1) /* incomplete read - wait for more  */
308             {
309                 if (conn->io_pending & CS_WANT_WRITE)
310                     assoc->cs_get_mask |= EVENT_OUTPUT;
311                 iochan_setflag(h, assoc->cs_get_mask);
312                 return 0;
313             }
314             /* we got a complete PDU. Let's decode it */
315             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
316                     assoc->input_buffer[0] & 0xff,
317                     assoc->input_buffer[1] & 0xff,
318                     assoc->input_buffer[2] & 0xff);
319             req = request_get(&assoc->incoming); /* get a new request */
320             odr_reset(assoc->decode);
321             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
322             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
323             {
324                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
325                         "[near byte %ld] ",
326                         odr_errmsg(odr_geterror(assoc->decode)),
327                         odr_getelement(assoc->decode),
328                         (long) odr_offset(assoc->decode));
329                 if (assoc->decode->error != OHTTP)
330                 {
331                     yaz_log(YLOG_WARN, "PDU dump:");
332                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
333                     request_release(req);
334                     do_close(assoc, Z_Close_protocolError, "Malformed package");
335                 }
336                 else
337                 {
338                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
339                     assoc->state = ASSOC_DEAD;
340                     process_gdu_response(assoc, req, p);
341                 }
342                 return 0;
343             }
344             req->request_mem = odr_extract_mem(assoc->decode);
345             if (assoc->print) 
346             {
347                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
348                     yaz_log(YLOG_WARN, "ODR print error: %s", 
349                             odr_errmsg(odr_geterror(assoc->print)));
350                 odr_reset(assoc->print);
351             }
352             request_enq(&assoc->incoming, req);
353         }
354         while (cs_more(conn));
355     }
356     return 1;
357 }
358
359 /*
360  * This is where PDUs from the client are read and the further
361  * processing is initiated. Flow of control moves down through the
362  * various process_* functions below, until the encoded result comes back up
363  * to the output handler in here.
364  * 
365  *  h     : the I/O channel that has an outstanding event.
366  *  event : the current outstanding event.
367  */
368 void ir_session(IOCHAN h, int event)
369 {
370     int res;
371     association *assoc = (association *)iochan_getdata(h);
372     COMSTACK conn = assoc->client_link;
373     request *req;
374
375     assert(h && conn && assoc);
376     if (event == EVENT_TIMEOUT)
377     {
378         if (assoc->state != ASSOC_UP)
379         {
380             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
381             /* do we need to lod this at all */
382             cs_close(conn);
383             destroy_association(assoc);
384             iochan_destroy(h);
385         }
386         else
387         {
388             yaz_log(log_sessiondetail, 
389                     "Session idle too long. Sending close.");
390             do_close(assoc, Z_Close_lackOfActivity, 0);
391         }
392         return;
393     }
394     if (event & assoc->cs_accept_mask)
395     {
396         if (!cs_accept(conn))
397         {
398             yaz_log(YLOG_WARN, "accept failed");
399             destroy_association(assoc);
400             iochan_destroy(h);
401             return;
402         }
403         iochan_clearflag(h, EVENT_OUTPUT);
404         if (conn->io_pending) 
405         {   /* cs_accept didn't complete */
406             assoc->cs_accept_mask = 
407                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
408                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
409
410             iochan_setflag(h, assoc->cs_accept_mask);
411         }
412         else
413         {   /* cs_accept completed. Prepare for reading (cs_get) */
414             assoc->cs_accept_mask = 0;
415             assoc->cs_get_mask = EVENT_INPUT;
416             iochan_setflag(h, assoc->cs_get_mask);
417         }
418         return;
419     }
420     if (event & assoc->cs_get_mask) /* input */
421     {
422         if (!ir_read(h, event))
423             return;
424         req = request_head(&assoc->incoming);
425         if (req->state == REQUEST_IDLE)
426         {
427             request_deq(&assoc->incoming);
428             process_gdu_request(assoc, req);
429         }
430     }
431     if (event & assoc->cs_put_mask)
432     {
433         request *req = request_head(&assoc->outgoing);
434
435         assoc->cs_put_mask = 0;
436         yaz_log(YLOG_DEBUG, "ir_session (output)");
437         req->state = REQUEST_PENDING;
438         switch (res = cs_put(conn, req->response, req->len_response))
439         {
440         case -1:
441             yaz_log(log_sessiondetail, "Connection closed by client");
442             cs_close(conn);
443             destroy_association(assoc);
444             iochan_destroy(h);
445             break;
446         case 0: /* all sent - release the request structure */
447             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
448 #if 0
449             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
450                     req->response);
451 #endif
452             nmem_destroy(req->request_mem);
453             request_deq(&assoc->outgoing);
454             request_release(req);
455             if (!request_head(&assoc->outgoing))
456             {   /* restore mask for cs_get operation ... */
457                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
458                 iochan_setflag(h, assoc->cs_get_mask);
459                 if (assoc->state == ASSOC_DEAD)
460                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
461             }
462             else
463             {
464                 assoc->cs_put_mask = EVENT_OUTPUT;
465             }
466             break;
467         default:
468             if (conn->io_pending & CS_WANT_WRITE)
469                 assoc->cs_put_mask |= EVENT_OUTPUT;
470             if (conn->io_pending & CS_WANT_READ)
471                 assoc->cs_put_mask |= EVENT_INPUT;
472             iochan_setflag(h, assoc->cs_put_mask);
473         }
474     }
475     if (event & EVENT_EXCEPT)
476     {
477         yaz_log(YLOG_WARN, "ir_session (exception)");
478         cs_close(conn);
479         destroy_association(assoc);
480         iochan_destroy(h);
481     }
482 }
483
484 static int process_z_request(association *assoc, request *req, char **msg);
485
486
487 static void assoc_init_reset(association *assoc)
488 {
489     xfree (assoc->init);
490     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
491
492     assoc->init->stream = assoc->encode;
493     assoc->init->print = assoc->print;
494     assoc->init->auth = 0;
495     assoc->init->referenceId = 0;
496     assoc->init->implementation_version = 0;
497     assoc->init->implementation_id = 0;
498     assoc->init->implementation_name = 0;
499     assoc->init->query_charset = 0;
500     assoc->init->records_in_same_charset = 0;
501     assoc->init->bend_sort = NULL;
502     assoc->init->bend_search = NULL;
503     assoc->init->bend_present = NULL;
504     assoc->init->bend_esrequest = NULL;
505     assoc->init->bend_delete = NULL;
506     assoc->init->bend_scan = NULL;
507     assoc->init->bend_segment = NULL;
508     assoc->init->bend_fetch = NULL;
509     assoc->init->bend_explain = NULL;
510     assoc->init->bend_srw_scan = NULL;
511     assoc->init->bend_srw_update = NULL;
512
513     assoc->init->charneg_request = NULL;
514     assoc->init->charneg_response = NULL;
515
516     assoc->init->decode = assoc->decode;
517     assoc->init->peer_name = 
518         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
519
520     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
521 }
522
523 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
524 {
525     statserv_options_block *cb = statserv_getcontrol();
526     if (!assoc->init)
527     {
528         const char *encoding = "UTF-8";
529         Z_External *ce;
530         bend_initresult *binitres;
531
532         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
533         assoc_init_reset(assoc);
534         
535         if (sr->username)
536         {
537             Z_IdAuthentication *auth = (Z_IdAuthentication *)
538                 odr_malloc(assoc->decode, sizeof(*auth));
539             int len;
540
541             len = strlen(sr->username) + 1;
542             if (sr->password) 
543                 len += strlen(sr->password) + 2;
544             auth->which = Z_IdAuthentication_open;
545             auth->u.open = (char *) odr_malloc(assoc->decode, len);
546             strcpy(auth->u.open, sr->username);
547             if (sr->password && *sr->password)
548             {
549                 strcat(auth->u.open, "/");
550                 strcat(auth->u.open, sr->password);
551             }
552             assoc->init->auth = auth;
553         }
554
555 #if 1
556         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
557         assoc->init->charneg_request = ce->u.charNeg3;
558 #endif
559         assoc->backend = 0;
560         if (!(binitres = (*cb->bend_init)(assoc->init)))
561         {
562             assoc->state = ASSOC_DEAD;
563             yaz_add_srw_diagnostic(assoc->encode, d, num,
564                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
565             return 0;
566         }
567         assoc->backend = binitres->handle;
568         assoc->init->auth = 0;
569         if (binitres->errcode)
570         {
571             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
572             assoc->state = ASSOC_DEAD;
573             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
574                                    binitres->errstring);
575             return 0;
576         }
577         return 1;
578     }
579     return 1;
580 }
581
582 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
583 {
584 #if YAZ_HAVE_XML2
585     yaz_record_conv_t rc = 0;
586     const char *match_schema = 0;
587     Odr_oid *match_syntax = 0;
588
589     if (assoc->server)
590     {
591         int r;
592         const char *input_schema = yaz_get_esn(rr->comp);
593         Odr_oid *input_syntax_raw = rr->request_format;
594         
595         const char *backend_schema = 0;
596         Odr_oid *backend_syntax = 0;
597
598         r = yaz_retrieval_request(assoc->server->retrieval,
599                                   input_schema,
600                                   input_syntax_raw,
601                                   &match_schema,
602                                   &match_syntax,
603                                   &rc,
604                                   &backend_schema,
605                                   &backend_syntax);
606         if (r == -1) /* error ? */
607         {
608             const char *details = yaz_retrieval_get_error(
609                 assoc->server->retrieval);
610
611             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
612             if (details)
613                 rr->errstring = odr_strdup(rr->stream, details);
614             return -1;
615         }
616         else if (r == 1 || r == 3)
617         {
618             const char *details = input_schema;
619             rr->errcode =
620                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
621             if (details)
622                 rr->errstring = odr_strdup(rr->stream, details);
623             return -1;
624         }
625         else if (r == 2)
626         {
627             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
628             if (input_syntax_raw)
629             {
630                 char oidbuf[OID_STR_MAX];
631                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
632                 rr->errstring = odr_strdup(rr->stream, oidbuf);
633             }
634             return -1;
635         }
636         if (backend_schema)
637         {
638             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
639         }
640         if (backend_syntax)
641             rr->request_format = backend_syntax;
642     }
643     (*assoc->init->bend_fetch)(assoc->backend, rr);
644     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
645     {   /* post conversion must take place .. */
646         WRBUF output_record = wrbuf_alloc();
647         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
648         if (r)
649         {
650             const char *details = yaz_record_conv_get_error(rc);
651             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
652             if (details)
653                 rr->errstring = odr_strdup(rr->stream, details);
654         }
655         else
656         {
657             rr->len = wrbuf_len(output_record);
658             rr->record = (char *) odr_malloc(rr->stream, rr->len);
659             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
660         }
661         wrbuf_destroy(output_record);
662     }
663     if (match_syntax)
664         rr->output_format = match_syntax;
665     if (match_schema)
666         rr->schema = odr_strdup(rr->stream, match_schema);
667     return 0;
668 #else
669     (*assoc->init->bend_fetch)(assoc->backend, rr);
670 #endif
671     return 0;
672 }
673
674 static int srw_bend_fetch(association *assoc, int pos,
675                           Z_SRW_searchRetrieveRequest *srw_req,
676                           Z_SRW_record *record,
677                           const char **addinfo)
678 {
679     bend_fetch_rr rr;
680     ODR o = assoc->encode;
681
682     rr.setname = "default";
683     rr.number = pos;
684     rr.referenceId = 0;
685     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
686
687     rr.comp = (Z_RecordComposition *)
688             odr_malloc(assoc->decode, sizeof(*rr.comp));
689     rr.comp->which = Z_RecordComp_complex;
690     rr.comp->u.complex = (Z_CompSpec *)
691             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
692     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
693         odr_malloc(assoc->encode, sizeof(bool_t));
694     *rr.comp->u.complex->selectAlternativeSyntax = 0;    
695     rr.comp->u.complex->num_dbSpecific = 0;
696     rr.comp->u.complex->dbSpecific = 0;
697     rr.comp->u.complex->num_recordSyntax = 0; 
698     rr.comp->u.complex->recordSyntax = 0;
699
700     rr.comp->u.complex->generic = (Z_Specification *) 
701             odr_malloc(assoc->decode, sizeof(Z_Specification));
702
703     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
704     rr.comp->u.complex->generic->which = Z_Schema_uri;
705     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
706
707     /* ESN = recordSchema if recordSchema is present */
708     rr.comp->u.complex->generic->elementSpec = 0;
709     if (srw_req->recordSchema)
710     {
711         rr.comp->u.complex->generic->elementSpec = 
712             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
713         rr.comp->u.complex->generic->elementSpec->which = 
714             Z_ElementSpec_elementSetName;
715         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
716             srw_req->recordSchema;
717     }
718     
719     rr.stream = assoc->encode;
720     rr.print = assoc->print;
721
722     rr.basename = 0;
723     rr.len = 0;
724     rr.record = 0;
725     rr.last_in_set = 0;
726     rr.errcode = 0;
727     rr.errstring = 0;
728     rr.surrogate_flag = 0;
729     rr.schema = srw_req->recordSchema;
730
731     if (!assoc->init->bend_fetch)
732         return 1;
733
734     retrieve_fetch(assoc, &rr);
735
736     if (rr.errcode && rr.surrogate_flag)
737     {
738         int code = yaz_diag_bib1_to_srw(rr.errcode);
739         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
740         return 0;
741     }
742     else if (rr.len >= 0)
743     {
744         record->recordData_buf = rr.record;
745         record->recordData_len = rr.len;
746         record->recordPosition = odr_intdup(o, pos);
747         record->recordSchema = odr_strdup_null(
748             o, rr.schema ? rr.schema : srw_req->recordSchema);
749     }
750     if (rr.errcode)
751     {
752         *addinfo = rr.errstring;
753         return rr.errcode;
754     }
755     return 0;
756 }
757
758 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
759                    Z_Query *query_result)
760 {
761     /* have a CQL query and  CQL to PQF transform .. */
762     CQL_parser cp = cql_parser_create();
763     int r;
764     int srw_errcode = 0;
765     const char *add = 0;
766     char rpn_buf[5120];
767             
768     r = cql_parser_string(cp, cql);
769     if (r)
770     {
771         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
772     }
773     if (!r)
774     {
775         /* Syntax OK */
776         r = cql_transform_buf(ct,
777                               cql_parser_result(cp),
778                               rpn_buf, sizeof(rpn_buf)-1);
779         if (r)
780             srw_errcode = cql_transform_error(ct, &add);
781     }
782     if (!r)
783     {
784         /* Syntax & transform OK. */
785         /* Convert PQF string to Z39.50 to RPN query struct */
786         YAZ_PQF_Parser pp = yaz_pqf_create();
787         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
788         if (!rpnquery)
789         {
790             size_t off;
791             const char *pqf_msg;
792             int code = yaz_pqf_error(pp, &pqf_msg, &off);
793             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
794                     pqf_msg, code);
795             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
796         }
797         else
798         {
799             query_result->which = Z_Query_type_1;
800             query_result->u.type_1 = rpnquery;
801         }
802         yaz_pqf_destroy(pp);
803     }
804     cql_parser_destroy(cp);
805     return srw_errcode;
806 }
807
808 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
809                         Z_AttributesPlusTerm *result)
810 {
811     Z_Query query;
812     Z_RPNQuery *rpn;
813     int srw_error = cql2pqf(odr, cql, ct, &query);
814     if (srw_error)
815         return srw_error;
816     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
817         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
818     rpn = query.u.type_1;
819     if (!rpn->RPNStructure) 
820         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
821     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
822         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
823     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
824         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
825     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
826            sizeof(*result));
827     return 0;
828 }
829                    
830
831 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
832                    bend_search_rr *bsrr) {
833     char *ccl0;
834     struct ccl_rpn_node *node;
835     int errcode, pos;
836
837     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
838     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0) {
839         bsrr->errstring = (char*) ccl_err_msg(errcode);
840         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
841     }
842
843     bsrr->query->which = Z_Query_type_1;
844     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
845     return 0;
846 }
847
848
849 static void srw_bend_search(association *assoc, request *req,
850                             Z_SRW_PDU *sr,
851                             Z_SRW_searchRetrieveResponse *srw_res,
852                             int *http_code)
853 {
854     int srw_error = 0;
855     Z_External *ext;
856     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
857     
858     *http_code = 200;
859     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
860     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
861     if (srw_res->num_diagnostics == 0 && assoc->init)
862     {
863         bend_search_rr rr;
864         rr.setname = "default";
865         rr.replace_set = 1;
866         rr.num_bases = 1;
867         rr.basenames = &srw_req->database;
868         rr.referenceId = 0;
869         rr.srw_sortKeys = 0;
870         rr.srw_setname = 0;
871         rr.srw_setnameIdleTime = 0;
872         rr.estimated_hit_count = 0;
873         rr.partial_resultset = 0;
874         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
875         rr.query->u.type_1 = 0;
876         
877         if (srw_req->query_type == Z_SRW_query_type_cql)
878         {
879             if (assoc->server && assoc->server->cql_transform)
880             {
881                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
882                                           assoc->server->cql_transform,
883                                           rr.query);
884                 if (srw_errcode)
885                 {
886                     yaz_add_srw_diagnostic(assoc->encode,
887                                            &srw_res->diagnostics,
888                                            &srw_res->num_diagnostics,
889                                            srw_errcode, 0);
890                 }
891             }
892             else
893             {
894                 /* CQL query to backend. Wrap it - Z39.50 style */
895                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
896                 ext->direct_reference = odr_getoidbystr(assoc->decode, 
897                                                         "1.2.840.10003.16.2");
898                 ext->indirect_reference = 0;
899                 ext->descriptor = 0;
900                 ext->which = Z_External_CQL;
901                 ext->u.cql = srw_req->query.cql;
902                 
903                 rr.query->which = Z_Query_type_104;
904                 rr.query->u.type_104 =  ext;
905             }
906         }
907         else if (srw_req->query_type == Z_SRW_query_type_pqf)
908         {
909             Z_RPNQuery *RPNquery;
910             YAZ_PQF_Parser pqf_parser;
911             
912             pqf_parser = yaz_pqf_create();
913             
914             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
915                                      srw_req->query.pqf);
916             if (!RPNquery)
917             {
918                 const char *pqf_msg;
919                 size_t off;
920                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
921                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
922                         code, pqf_msg, (long) off);
923                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
924             }
925             
926             rr.query->which = Z_Query_type_1;
927             rr.query->u.type_1 =  RPNquery;
928             
929             yaz_pqf_destroy(pqf_parser);
930         }
931         else
932         {
933             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
934                                    &srw_res->num_diagnostics,
935                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
936         }
937         if (rr.query->u.type_1)
938         {
939             rr.stream = assoc->encode;
940             rr.decode = assoc->decode;
941             rr.print = assoc->print;
942             rr.request = req;
943             if ( srw_req->sort.sortKeys )
944                 rr.srw_sortKeys = odr_strdup(assoc->encode, 
945                                              srw_req->sort.sortKeys );
946             rr.association = assoc;
947             rr.fd = 0;
948             rr.hits = 0;
949             rr.errcode = 0;
950             rr.errstring = 0;
951             rr.search_info = 0;
952             yaz_log_zquery_level(log_requestdetail,rr.query);
953             
954             (assoc->init->bend_search)(assoc->backend, &rr);
955             if (rr.errcode)
956             {
957                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
958                 {
959                     *http_code = 404;
960                 }
961                 else
962                 {
963                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
964                     yaz_add_srw_diagnostic(assoc->encode,
965                                            &srw_res->diagnostics,
966                                            &srw_res->num_diagnostics,
967                                            srw_error, rr.errstring);
968                 }
969             }
970             else
971             {
972                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
973                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
974                 
975                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
976                         start, number, rr.hits);
977                 
978                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
979                 if (rr.srw_setname)
980                 {
981                     srw_res->resultSetId =
982                         odr_strdup(assoc->encode, rr.srw_setname );
983                     srw_res->resultSetIdleTime =
984                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
985                 }
986                 
987                 if (start > rr.hits || start < 1)
988                 {
989                     /* if hits<=0 and start=1 we don't return a diagnostic */
990                     if (start != 1)
991                         yaz_add_srw_diagnostic(
992                             assoc->encode, 
993                             &srw_res->diagnostics, &srw_res->num_diagnostics,
994                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
995                 }
996                 else if (number > 0)
997                 {
998                     int i;
999                     int ok = 1;
1000                     if (start + number > rr.hits)
1001                         number = rr.hits - start + 1;
1002                     
1003                     /* Call bend_present if defined */
1004                     if (assoc->init->bend_present)
1005                     {
1006                         bend_present_rr *bprr = (bend_present_rr*)
1007                             odr_malloc(assoc->decode, sizeof(*bprr));
1008                         bprr->setname = "default";
1009                         bprr->start = start;
1010                         bprr->number = number;
1011                         if (srw_req->recordSchema)
1012                         {
1013                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1014                                                                             sizeof(*bprr->comp));
1015                             bprr->comp->which = Z_RecordComp_simple;
1016                             bprr->comp->u.simple = (Z_ElementSetNames *)
1017                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1018                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1019                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1020                         }
1021                         else
1022                         {
1023                             bprr->comp = 0;
1024                         }
1025                         bprr->stream = assoc->encode;
1026                         bprr->referenceId = 0;
1027                         bprr->print = assoc->print;
1028                         bprr->request = req;
1029                         bprr->association = assoc;
1030                         bprr->errcode = 0;
1031                         bprr->errstring = NULL;
1032                         (*assoc->init->bend_present)(assoc->backend, bprr);
1033                         
1034                         if (!bprr->request)
1035                             return;
1036                         if (bprr->errcode)
1037                         {
1038                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1039                             yaz_add_srw_diagnostic(assoc->encode,
1040                                                    &srw_res->diagnostics,
1041                                                    &srw_res->num_diagnostics,
1042                                                    srw_error, bprr->errstring);
1043                             ok = 0;
1044                         }
1045                     }
1046                     
1047                     if (ok)
1048                     {
1049                         int j = 0;
1050                         int packing = Z_SRW_recordPacking_string;
1051                         if (srw_req->recordPacking)
1052                         {
1053                             packing = 
1054                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1055                             if (packing == -1)
1056                                 packing = Z_SRW_recordPacking_string;
1057                         }
1058                         srw_res->records = (Z_SRW_record *)
1059                             odr_malloc(assoc->encode,
1060                                        number * sizeof(*srw_res->records));
1061                         
1062                         srw_res->extra_records = (Z_SRW_extra_record **)
1063                             odr_malloc(assoc->encode,
1064                                        number*sizeof(*srw_res->extra_records));
1065
1066                         for (i = 0; i<number; i++)
1067                         {
1068                             int errcode;
1069                             const char *addinfo = 0;
1070                             
1071                             srw_res->records[j].recordPacking = packing;
1072                             srw_res->records[j].recordData_buf = 0;
1073                             srw_res->extra_records[j] = 0;
1074                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1075                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1076                                                      srw_res->records + j,
1077                                                      &addinfo);
1078                             if (errcode)
1079                             {
1080                                 yaz_add_srw_diagnostic(assoc->encode,
1081                                                        &srw_res->diagnostics,
1082                                                        &srw_res->num_diagnostics,
1083                                                        yaz_diag_bib1_to_srw(errcode),
1084                                                        addinfo);
1085                                 
1086                                 break;
1087                             }
1088                             if (srw_res->records[j].recordData_buf)
1089                                 j++;
1090                         }
1091                         srw_res->num_records = j;
1092                         if (!j)
1093                             srw_res->records = 0;
1094                     }
1095                 }
1096                 if (rr.estimated_hit_count || rr.partial_resultset)
1097                 {
1098                     yaz_add_srw_diagnostic(
1099                         assoc->encode,
1100                         &srw_res->diagnostics,
1101                         &srw_res->num_diagnostics,
1102                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1103                         0);
1104                 }
1105             }
1106         }
1107     }
1108     if (log_request)
1109     {
1110         const char *querystr = "?";
1111         const char *querytype = "?";
1112         WRBUF wr = wrbuf_alloc();
1113
1114         switch (srw_req->query_type)
1115         {
1116         case Z_SRW_query_type_cql:
1117             querytype = "CQL";
1118             querystr = srw_req->query.cql;
1119             break;
1120         case Z_SRW_query_type_pqf:
1121             querytype = "PQF";
1122             querystr = srw_req->query.pqf;
1123             break;
1124         }
1125         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1126         if (srw_res->num_diagnostics)
1127             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1128         else if (*http_code != 200)
1129             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1130         else if (srw_res->numberOfRecords)
1131         {
1132             wrbuf_printf(wr, "OK %d",
1133                          (srw_res->numberOfRecords ?
1134                           *srw_res->numberOfRecords : 0));
1135         }
1136         wrbuf_printf(wr, " %s %d+%d", 
1137                      (srw_res->resultSetId ?
1138                       srw_res->resultSetId : "-"),
1139                      (srw_req->startRecord ? *srw_req->startRecord : 1), 
1140                      srw_res->num_records);
1141         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1142         wrbuf_destroy(wr);
1143     }
1144 }
1145
1146 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1147 {
1148 #if YAZ_HAVE_XML2
1149     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1150     if (!ptr)
1151         return 0;
1152     for (ptr = ptr->children; ptr; ptr = ptr->next)
1153     {
1154         if (ptr->type != XML_ELEMENT_NODE)
1155             continue;
1156         if (!strcmp((const char *) ptr->name, "explain"))
1157         {
1158             int len;
1159             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1160             xmlChar *buf_out;
1161             char *content;
1162
1163             ptr = xmlCopyNode(ptr, 1);
1164         
1165             xmlDocSetRootElement(doc, ptr);
1166             
1167             xmlDocDumpMemory(doc, &buf_out, &len);
1168             content = (char*) odr_malloc(rr->stream, 1+len);
1169             memcpy(content, buf_out, len);
1170             content[len] = '\0';
1171             
1172             xmlFree(buf_out);
1173             xmlFreeDoc(doc);
1174             rr->explain_buf = content;
1175             return 0;
1176         }
1177     }
1178 #endif
1179     return 0;
1180 }
1181
1182 static void srw_bend_explain(association *assoc, request *req,
1183                              Z_SRW_PDU *sr,
1184                              Z_SRW_explainResponse *srw_res,
1185                              int *http_code)
1186 {
1187     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1188     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1189     *http_code = 404;
1190     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1191     if (assoc->init)
1192     {
1193         bend_explain_rr rr;
1194         
1195         rr.stream = assoc->encode;
1196         rr.decode = assoc->decode;
1197         rr.print = assoc->print;
1198         rr.explain_buf = 0;
1199         rr.database = srw_req->database;
1200         if (assoc->server)
1201             rr.server_node_ptr = assoc->server->server_node_ptr;
1202         else
1203             rr.server_node_ptr = 0;
1204         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1205         if (assoc->init->bend_explain)
1206             (*assoc->init->bend_explain)(assoc->backend, &rr);
1207         else
1208             srw_bend_explain_default(assoc->backend, &rr);
1209
1210         if (rr.explain_buf)
1211         {
1212             int packing = Z_SRW_recordPacking_string;
1213             if (srw_req->recordPacking)
1214             {
1215                 packing = 
1216                     yaz_srw_str_to_pack(srw_req->recordPacking);
1217                 if (packing == -1)
1218                     packing = Z_SRW_recordPacking_string;
1219             }
1220             srw_res->record.recordSchema = rr.schema;
1221             srw_res->record.recordPacking = packing;
1222             srw_res->record.recordData_buf = rr.explain_buf;
1223             srw_res->record.recordData_len = strlen(rr.explain_buf);
1224             srw_res->record.recordPosition = 0;
1225             *http_code = 200;
1226         }
1227     }
1228 }
1229
1230 static void srw_bend_scan(association *assoc, request *req,
1231                           Z_SRW_PDU *sr,
1232                           Z_SRW_scanResponse *srw_res,
1233                           int *http_code)
1234 {
1235     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1236     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1237
1238     *http_code = 200;
1239     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1240     if (srw_res->num_diagnostics == 0 && assoc->init)
1241     {
1242         struct scan_entry *save_entries;
1243
1244         bend_scan_rr *bsrr = (bend_scan_rr *)
1245             odr_malloc(assoc->encode, sizeof(*bsrr));
1246         bsrr->num_bases = 1;
1247         bsrr->basenames = &srw_req->database;
1248
1249         bsrr->num_entries = srw_req->maximumTerms ?
1250             *srw_req->maximumTerms : 10;
1251         bsrr->term_position = srw_req->responsePosition ?
1252             *srw_req->responsePosition : 1;
1253
1254         bsrr->errcode = 0;
1255         bsrr->errstring = 0;
1256         bsrr->referenceId = 0;
1257         bsrr->stream = assoc->encode;
1258         bsrr->print = assoc->print;
1259         bsrr->step_size = odr_intdup(assoc->decode, 0);
1260         bsrr->entries = 0;
1261         bsrr->setname = 0;
1262
1263         if (bsrr->num_entries > 0) 
1264         {
1265             int i;
1266             bsrr->entries = (struct scan_entry *) 
1267                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1268                            bsrr->num_entries);
1269             for (i = 0; i<bsrr->num_entries; i++)
1270             {
1271                 bsrr->entries[i].term = 0;
1272                 bsrr->entries[i].occurrences = 0;
1273                 bsrr->entries[i].errcode = 0;
1274                 bsrr->entries[i].errstring = 0;
1275                 bsrr->entries[i].display_term = 0;
1276             }
1277         }
1278         save_entries = bsrr->entries;  /* save it so we can compare later */
1279
1280         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1281             assoc->init->bend_scan)
1282         {
1283             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1284             
1285             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1286                                       &bsrr->attributeset, 
1287                                       srw_req->scanClause.pqf); 
1288             yaz_pqf_destroy(pqf_parser);
1289             bsrr->scanClause = 0;
1290             ((int (*)(void *, bend_scan_rr *))
1291              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1292         }
1293         else if (srw_req->query_type == Z_SRW_query_type_cql
1294                  && assoc->init->bend_scan && assoc->server
1295                  && assoc->server->cql_transform)
1296         {
1297             int srw_error;
1298             bsrr->scanClause = 0;
1299             bsrr->attributeset = 0;
1300             bsrr->term = (Z_AttributesPlusTerm *)
1301                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1302             srw_error = cql2pqf_scan(assoc->encode,
1303                                      srw_req->scanClause.cql,
1304                                      assoc->server->cql_transform,
1305                                      bsrr->term);
1306             if (srw_error)
1307                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1308                                        &srw_res->num_diagnostics,
1309                                        srw_error, 0);
1310             else
1311             {
1312                 ((int (*)(void *, bend_scan_rr *))
1313                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1314             }
1315         }
1316         else if (srw_req->query_type == Z_SRW_query_type_cql
1317                  && assoc->init->bend_srw_scan)
1318         {
1319             bsrr->term = 0;
1320             bsrr->attributeset = 0;
1321             bsrr->scanClause = srw_req->scanClause.cql;
1322             ((int (*)(void *, bend_scan_rr *))
1323              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1324         }
1325         else
1326         {
1327             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1328                                    &srw_res->num_diagnostics,
1329                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1330         }
1331         if (bsrr->errcode)
1332         {
1333             int srw_error;
1334             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1335             {
1336                 *http_code = 404;
1337                 return;
1338             }
1339             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1340
1341             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1342                                    &srw_res->num_diagnostics,
1343                                    srw_error, bsrr->errstring);
1344         }
1345         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1346         {
1347             int i;
1348             srw_res->terms = (Z_SRW_scanTerm*)
1349                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1350                            bsrr->num_entries);
1351
1352             srw_res->num_terms =  bsrr->num_entries;
1353             for (i = 0; i<bsrr->num_entries; i++)
1354             {
1355                 Z_SRW_scanTerm *t = srw_res->terms + i;
1356                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1357                 t->numberOfRecords =
1358                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1359                 t->displayTerm = 0;
1360                 if (save_entries == bsrr->entries && 
1361                     bsrr->entries[i].display_term)
1362                 {
1363                     /* the entries was _not_ set by the handler. So it's
1364                        safe to test for new member display_term. It is
1365                        NULL'ed by us.
1366                     */
1367                     t->displayTerm = odr_strdup(assoc->encode, 
1368                                                 bsrr->entries[i].display_term);
1369                 }
1370                 t->whereInList = 0;
1371             }
1372         }
1373     }
1374     if (log_request)
1375     {
1376         WRBUF wr = wrbuf_alloc();
1377         const char *querytype = 0;
1378         const char *querystr = 0;
1379
1380         switch(srw_req->query_type)
1381         {
1382         case Z_SRW_query_type_pqf:
1383             querytype = "PQF";
1384             querystr = srw_req->scanClause.pqf;
1385             break;
1386         case Z_SRW_query_type_cql:
1387             querytype = "CQL";
1388             querystr = srw_req->scanClause.cql;
1389             break;
1390         default:
1391             querytype = "UNKNOWN";
1392             querystr = "";
1393         }
1394
1395         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1396
1397         if (srw_res->num_diagnostics)
1398             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1399         else if (srw_res->num_terms)
1400             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1401         else
1402             wrbuf_printf(wr, "OK - - ");
1403
1404         wrbuf_printf(wr, "%d+%d+0 ",
1405                      (srw_req->responsePosition ? 
1406                       *srw_req->responsePosition : 1),
1407                      (srw_req->maximumTerms ?
1408                       *srw_req->maximumTerms : 1));
1409         /* there is no step size in SRU/W ??? */
1410         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1411         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1412         wrbuf_destroy(wr);
1413     }
1414
1415 }
1416
1417 static void srw_bend_update(association *assoc, request *req,
1418                             Z_SRW_PDU *sr,
1419                             Z_SRW_updateResponse *srw_res,
1420                             int *http_code)
1421 {
1422     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1423     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1424     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1425     *http_code = 404;
1426     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1427     if (assoc->init)
1428     {
1429         bend_update_rr rr;
1430         Z_SRW_extra_record *extra = srw_req->extra_record;
1431         
1432         rr.stream = assoc->encode;
1433         rr.print = assoc->print;
1434         rr.num_bases = 1;
1435         rr.basenames = &srw_req->database;
1436         rr.operation = srw_req->operation;
1437         rr.operation_status = "failed";
1438         rr.record_id = 0;
1439         rr.record_versions = 0;
1440         rr.num_versions = 0;
1441         rr.record_packing = "string";
1442         rr.record_schema = 0;
1443         rr.record_data = 0;
1444         rr.extra_record_data = 0;
1445         rr.extra_request_data = 0;
1446         rr.extra_response_data = 0;
1447         rr.uri = 0;
1448         rr.message = 0;
1449         rr.details = 0;
1450         
1451         *http_code = 200;
1452         if (rr.operation == 0)
1453         {
1454             yaz_add_sru_update_diagnostic(
1455                 assoc->encode, &srw_res->diagnostics,
1456                 &srw_res->num_diagnostics,
1457                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1458                 "action" );
1459             return;
1460         }
1461         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1462         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1463         if (!strcmp( rr.operation, "delete"))
1464         {
1465             if (srw_req->record && !srw_req->record->recordSchema)
1466             {
1467                 rr.record_schema = odr_strdup(
1468                     assoc->encode,
1469                     srw_req->record->recordSchema);
1470             }
1471             if (srw_req->record)
1472             {
1473                 rr.record_data = odr_strdupn(
1474                     assoc->encode, 
1475                     srw_req->record->recordData_buf,
1476                     srw_req->record->recordData_len );
1477             }
1478             if (extra && extra->extraRecordData_len)
1479             {
1480                 rr.extra_record_data = odr_strdupn(
1481                     assoc->encode, 
1482                     extra->extraRecordData_buf,
1483                     extra->extraRecordData_len );
1484             }
1485             if (srw_req->recordId)
1486                 rr.record_id = srw_req->recordId;
1487             else if (extra && extra->recordIdentifier)
1488                 rr.record_id = extra->recordIdentifier;
1489         }
1490         else if (!strcmp(rr.operation, "replace"))
1491         {
1492             if (srw_req->recordId)
1493                 rr.record_id = srw_req->recordId;
1494             else if (extra && extra->recordIdentifier)
1495                 rr.record_id = extra->recordIdentifier;
1496             else 
1497             {
1498                 yaz_add_sru_update_diagnostic(
1499                     assoc->encode, &srw_res->diagnostics,
1500                     &srw_res->num_diagnostics,
1501                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1502                     "recordIdentifier");
1503             }
1504             if (!srw_req->record)
1505             {
1506                 yaz_add_sru_update_diagnostic(
1507                     assoc->encode, &srw_res->diagnostics,
1508                     &srw_res->num_diagnostics,
1509                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1510                     "record");
1511             }
1512             else 
1513             {
1514                 if (srw_req->record->recordSchema)
1515                     rr.record_schema = odr_strdup(
1516                         assoc->encode, srw_req->record->recordSchema);
1517                 if (srw_req->record->recordData_len )
1518                 {
1519                     rr.record_data = odr_strdupn(assoc->encode, 
1520                                                  srw_req->record->recordData_buf,
1521                                                  srw_req->record->recordData_len );
1522                 }
1523                 else 
1524                 {
1525                     yaz_add_sru_update_diagnostic(
1526                         assoc->encode, &srw_res->diagnostics,
1527                         &srw_res->num_diagnostics,
1528                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,                                              
1529                         "recordData" );
1530                 }
1531             }
1532             if (extra && extra->extraRecordData_len)
1533             {
1534                 rr.extra_record_data = odr_strdupn(
1535                     assoc->encode, 
1536                     extra->extraRecordData_buf,
1537                     extra->extraRecordData_len );
1538             }
1539         }
1540         else if (!strcmp(rr.operation, "insert"))
1541         {
1542             if (srw_req->recordId)
1543                 rr.record_id = srw_req->recordId; 
1544             else if (extra)
1545                 rr.record_id = extra->recordIdentifier;
1546             
1547             if (srw_req->record)
1548             {
1549                 if (srw_req->record->recordSchema)
1550                     rr.record_schema = odr_strdup(
1551                         assoc->encode, srw_req->record->recordSchema);
1552             
1553                 if (srw_req->record->recordData_len)
1554                     rr.record_data = odr_strdupn(
1555                         assoc->encode, 
1556                         srw_req->record->recordData_buf,
1557                         srw_req->record->recordData_len );
1558             }
1559             if (extra && extra->extraRecordData_len)
1560             {
1561                 rr.extra_record_data = odr_strdupn(
1562                     assoc->encode, 
1563                     extra->extraRecordData_buf,
1564                     extra->extraRecordData_len );
1565             }
1566         }
1567         else 
1568             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1569                                           &srw_res->num_diagnostics,
1570                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1571                                           rr.operation );
1572
1573         if (srw_req->record)
1574         {
1575             const char *pack_str = 
1576                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1577             if (pack_str)
1578                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1579         }
1580
1581         if (srw_req->num_recordVersions)
1582         {
1583             rr.record_versions = srw_req->recordVersions;
1584             rr.num_versions = srw_req->num_recordVersions;
1585         }
1586         if (srw_req->extraRequestData_len)
1587         {
1588             rr.extra_request_data = odr_strdupn(assoc->encode,
1589                                                 srw_req->extraRequestData_buf,
1590                                                 srw_req->extraRequestData_len );
1591         }
1592         if (srw_res->num_diagnostics == 0)
1593         {
1594             if ( assoc->init->bend_srw_update)
1595                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1596             else 
1597                 yaz_add_sru_update_diagnostic(
1598                     assoc->encode, &srw_res->diagnostics,
1599                     &srw_res->num_diagnostics,
1600                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1601                     "No Update backend handler");
1602         }
1603
1604         if (rr.uri)
1605             yaz_add_srw_diagnostic_uri(assoc->encode,
1606                                        &srw_res->diagnostics,
1607                                        &srw_res->num_diagnostics,
1608                                        rr.uri, 
1609                                        rr.message,
1610                                        rr.details);
1611         srw_res->recordId = rr.record_id;
1612         srw_res->operationStatus = rr.operation_status;
1613         srw_res->recordVersions = rr.record_versions;
1614         srw_res->num_recordVersions = rr.num_versions;
1615         if (srw_res->extraResponseData_len)
1616         {
1617             srw_res->extraResponseData_buf = rr.extra_response_data;
1618             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1619         }
1620         if (srw_res->num_diagnostics == 0 && rr.record_data)
1621         {
1622             srw_res->record = yaz_srw_get_record(assoc->encode);
1623             srw_res->record->recordSchema = rr.record_schema;
1624             if (rr.record_packing)
1625             {
1626                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1627
1628                 if (pack == -1)
1629                 {
1630                     pack = Z_SRW_recordPacking_string;
1631                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1632                             rr.record_packing);
1633                 }
1634                 srw_res->record->recordPacking = pack;
1635             }
1636             srw_res->record->recordData_buf = rr.record_data;
1637             srw_res->record->recordData_len = strlen(rr.record_data);
1638             if (rr.extra_record_data)
1639             {
1640                 Z_SRW_extra_record *ex = 
1641                     yaz_srw_get_extra_record(assoc->encode);
1642                 srw_res->extra_record = ex;
1643                 ex->extraRecordData_buf = rr.extra_record_data;
1644                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1645             }
1646         }
1647     }
1648 }
1649
1650 /* check if path is OK (1); BAD (0) */
1651 static int check_path(const char *path)
1652 {
1653     if (*path != '/')
1654         return 0;
1655     if (strstr(path, ".."))
1656         return 0;
1657     return 1;
1658 }
1659
1660 static char *read_file(const char *fname, ODR o, int *sz)
1661 {
1662     char *buf;
1663     FILE *inf = fopen(fname, "rb");
1664     if (!inf)
1665         return 0;
1666
1667     fseek(inf, 0L, SEEK_END);
1668     *sz = ftell(inf);
1669     rewind(inf);
1670     buf = (char *) odr_malloc(o, *sz);
1671     if (fread(buf, 1, *sz, inf) != *sz)
1672         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1673     fclose(inf);
1674     return buf;     
1675 }
1676
1677 static void process_http_request(association *assoc, request *req)
1678 {
1679     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1680     ODR o = assoc->encode;
1681     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1682     Z_SRW_PDU *sr = 0;
1683     Z_SOAP *soap_package = 0;
1684     Z_GDU *p = 0;
1685     char *charset = 0;
1686     Z_HTTP_Response *hres = 0;
1687     int keepalive = 1;
1688     const char *stylesheet = 0; /* for now .. set later */
1689     Z_SRW_diagnostic *diagnostic = 0;
1690     int num_diagnostic = 0;
1691     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1692
1693     if (!control_association(assoc, host, 0))
1694     {
1695         p = z_get_HTTP_Response(o, 404);
1696         r = 1;
1697     }
1698     if (r == 2 && assoc->server && assoc->server->docpath
1699         && hreq->path[0] == '/' 
1700         && 
1701         /* check if path is a proper prefix of documentroot */
1702         strncmp(hreq->path+1, assoc->server->docpath,
1703                 strlen(assoc->server->docpath))
1704         == 0)
1705     {   
1706         if (!check_path(hreq->path))
1707         {
1708             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1709             p = z_get_HTTP_Response(o, 404);
1710         }
1711         else
1712         {
1713             int content_size = 0;
1714             char *content_buf = read_file(hreq->path+1, o, &content_size);
1715             if (!content_buf)
1716             {
1717                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1718                 p = z_get_HTTP_Response(o, 404);
1719             }
1720             else
1721             {
1722                 const char *ctype = 0;
1723                 yaz_mime_types types = yaz_mime_types_create();
1724                 
1725                 yaz_mime_types_add(types, "xsl", "application/xml");
1726                 yaz_mime_types_add(types, "xml", "application/xml");
1727                 yaz_mime_types_add(types, "css", "text/css");
1728                 yaz_mime_types_add(types, "html", "text/html");
1729                 yaz_mime_types_add(types, "htm", "text/html");
1730                 yaz_mime_types_add(types, "txt", "text/plain");
1731                 yaz_mime_types_add(types, "js", "application/x-javascript");
1732                 
1733                 yaz_mime_types_add(types, "gif", "image/gif");
1734                 yaz_mime_types_add(types, "png", "image/png");
1735                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1736                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1737                 
1738                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1739                 if (!ctype)
1740                 {
1741                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1742                     p = z_get_HTTP_Response(o, 404);
1743                 }
1744                 else
1745                 {
1746                     p = z_get_HTTP_Response(o, 200);
1747                     hres = p->u.HTTP_Response;
1748                     hres->content_buf = content_buf;
1749                     hres->content_len = content_size;
1750                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1751                 }
1752                 yaz_mime_types_destroy(types);
1753             }
1754         }
1755         r = 1;
1756     }
1757
1758     if (r == 2)
1759     {
1760         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1761         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1762     }
1763     if (r == 2)  /* not taken */
1764     {
1765         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1766                            &diagnostic, &num_diagnostic);
1767         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1768     }
1769     if (r == 0)  /* decode SRW/SRU OK .. */
1770     {
1771         int http_code = 200;
1772         if (sr->which == Z_SRW_searchRetrieve_request)
1773         {
1774             Z_SRW_PDU *res =
1775                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1776                                 sr->srw_version);
1777             stylesheet = sr->u.request->stylesheet;
1778             if (num_diagnostic)
1779             {
1780                 res->u.response->diagnostics = diagnostic;
1781                 res->u.response->num_diagnostics = num_diagnostic;
1782             }
1783             else
1784             {
1785                 srw_bend_search(assoc, req, sr, res->u.response, 
1786                                 &http_code);
1787             }
1788             if (http_code == 200)
1789                 soap_package->u.generic->p = res;
1790         }
1791         else if (sr->which == Z_SRW_explain_request)
1792         {
1793             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1794                                              sr->srw_version);
1795             stylesheet = sr->u.explain_request->stylesheet;
1796             if (num_diagnostic)
1797             {   
1798                 res->u.explain_response->diagnostics = diagnostic;
1799                 res->u.explain_response->num_diagnostics = num_diagnostic;
1800             }
1801             srw_bend_explain(assoc, req, sr,
1802                              res->u.explain_response, &http_code);
1803             if (http_code == 200)
1804                 soap_package->u.generic->p = res;
1805         }
1806         else if (sr->which == Z_SRW_scan_request)
1807         {
1808             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1809                                              sr->srw_version);
1810             stylesheet = sr->u.scan_request->stylesheet;
1811             if (num_diagnostic)
1812             {   
1813                 res->u.scan_response->diagnostics = diagnostic;
1814                 res->u.scan_response->num_diagnostics = num_diagnostic;
1815             }
1816             srw_bend_scan(assoc, req, sr,
1817                           res->u.scan_response, &http_code);
1818             if (http_code == 200)
1819                 soap_package->u.generic->p = res;
1820         }
1821         else if (sr->which == Z_SRW_update_request)
1822         {
1823             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1824                                              sr->srw_version);
1825             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1826             if (num_diagnostic)
1827             {   
1828                 res->u.update_response->diagnostics = diagnostic;
1829                 res->u.update_response->num_diagnostics = num_diagnostic;
1830             }
1831             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1832             srw_bend_update(assoc, req, sr,
1833                             res->u.update_response, &http_code);
1834             if (http_code == 200)
1835                 soap_package->u.generic->p = res;
1836         }
1837         else
1838         {
1839             yaz_log(log_request, "SOAP ERROR"); 
1840             /* FIXME - what error, what query */
1841             http_code = 500;
1842             z_soap_error(assoc->encode, soap_package,
1843                          "SOAP-ENV:Client", "Bad method", 0); 
1844         }
1845         if (http_code == 200 || http_code == 500)
1846         {
1847             static Z_SOAP_Handler soap_handlers[4] = {
1848 #if YAZ_HAVE_XML2
1849                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1850                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1851                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1852 #endif
1853                 {0, 0, 0}
1854             };
1855             char ctype[80];
1856             int ret;
1857             p = z_get_HTTP_Response(o, 200);
1858             hres = p->u.HTTP_Response;
1859
1860             if (!stylesheet && assoc->server)
1861                 stylesheet = assoc->server->stylesheet;
1862
1863             /* empty stylesheet means NO stylesheet */
1864             if (stylesheet && *stylesheet == '\0')
1865                 stylesheet = 0;
1866
1867             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1868                                        &hres->content_buf, &hres->content_len,
1869                                        soap_handlers, charset, stylesheet);
1870             hres->code = http_code;
1871
1872             strcpy(ctype, "text/xml");
1873             if (charset && strlen(charset) < sizeof(ctype)-30)
1874             {
1875                 strcat(ctype, "; charset=");
1876                 strcat(ctype, charset);
1877             }
1878             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1879         }
1880         else
1881             p = z_get_HTTP_Response(o, http_code);
1882     }
1883
1884     if (p == 0)
1885         p = z_get_HTTP_Response(o, 500);
1886     hres = p->u.HTTP_Response;
1887     if (!strcmp(hreq->version, "1.0")) 
1888     {
1889         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1890         if (v && !strcmp(v, "Keep-Alive"))
1891             keepalive = 1;
1892         else
1893             keepalive = 0;
1894         hres->version = "1.0";
1895     }
1896     else
1897     {
1898         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1899         if (v && !strcmp(v, "close"))
1900             keepalive = 0;
1901         else
1902             keepalive = 1;
1903         hres->version = "1.1";
1904     }
1905     if (!keepalive)
1906     {
1907         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1908         assoc->state = ASSOC_DEAD;
1909         assoc->cs_get_mask = 0;
1910     }
1911     else
1912     {
1913         int t;
1914         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1915
1916         if (alive && isdigit(*(const unsigned char *) alive))
1917             t = atoi(alive);
1918         else
1919             t = 15;
1920         if (t < 0 || t > 3600)
1921             t = 3600;
1922         iochan_settimeout(assoc->client_chan,t);
1923         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1924     }
1925     process_gdu_response(assoc, req, p);
1926 }
1927
1928 static void process_gdu_request(association *assoc, request *req)
1929 {
1930     if (req->gdu_request->which == Z_GDU_Z3950)
1931     {
1932         char *msg = 0;
1933         req->apdu_request = req->gdu_request->u.z3950;
1934         if (process_z_request(assoc, req, &msg) < 0)
1935             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1936     }
1937     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1938         process_http_request(assoc, req);
1939     else
1940     {
1941         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1942     }
1943 }
1944
1945 /*
1946  * Initiate request processing.
1947  */
1948 static int process_z_request(association *assoc, request *req, char **msg)
1949 {
1950     int fd = -1;
1951     Z_APDU *res;
1952     int retval;
1953     
1954     *msg = "Unknown Error";
1955     assert(req && req->state == REQUEST_IDLE);
1956     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1957     {
1958         *msg = "Missing InitRequest";
1959         return -1;
1960     }
1961     switch (req->apdu_request->which)
1962     {
1963     case Z_APDU_initRequest:
1964         res = process_initRequest(assoc, req); break;
1965     case Z_APDU_searchRequest:
1966         res = process_searchRequest(assoc, req, &fd); break;
1967     case Z_APDU_presentRequest:
1968         res = process_presentRequest(assoc, req, &fd); break;
1969     case Z_APDU_scanRequest:
1970         if (assoc->init->bend_scan)
1971             res = process_scanRequest(assoc, req, &fd);
1972         else
1973         {
1974             *msg = "Cannot handle Scan APDU";
1975             return -1;
1976         }
1977         break;
1978     case Z_APDU_extendedServicesRequest:
1979         if (assoc->init->bend_esrequest)
1980             res = process_ESRequest(assoc, req, &fd);
1981         else
1982         {
1983             *msg = "Cannot handle Extended Services APDU";
1984             return -1;
1985         }
1986         break;
1987     case Z_APDU_sortRequest:
1988         if (assoc->init->bend_sort)
1989             res = process_sortRequest(assoc, req, &fd);
1990         else
1991         {
1992             *msg = "Cannot handle Sort APDU";
1993             return -1;
1994         }
1995         break;
1996     case Z_APDU_close:
1997         process_close(assoc, req);
1998         return 0;
1999     case Z_APDU_deleteResultSetRequest:
2000         if (assoc->init->bend_delete)
2001             res = process_deleteRequest(assoc, req, &fd);
2002         else
2003         {
2004             *msg = "Cannot handle Delete APDU";
2005             return -1;
2006         }
2007         break;
2008     case Z_APDU_segmentRequest:
2009         if (assoc->init->bend_segment)
2010         {
2011             res = process_segmentRequest(assoc, req);
2012         }
2013         else
2014         {
2015             *msg = "Cannot handle Segment APDU";
2016             return -1;
2017         }
2018         break;
2019     case Z_APDU_triggerResourceControlRequest:
2020         return 0;
2021     default:
2022         *msg = "Bad APDU received";
2023         return -1;
2024     }
2025     if (res)
2026     {
2027         yaz_log(YLOG_DEBUG, "  result immediately available");
2028         retval = process_z_response(assoc, req, res);
2029     }
2030     else if (fd < 0)
2031     {
2032         yaz_log(YLOG_DEBUG, "  result unavailble");
2033         retval = 0;
2034     }
2035     else /* no result yet - one will be provided later */
2036     {
2037         IOCHAN chan;
2038
2039         /* Set up an I/O handler for the fd supplied by the backend */
2040
2041         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2042         req->state = REQUEST_PENDING;
2043         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2044             abort();
2045         iochan_setdata(chan, assoc);
2046         retval = 0;
2047     }
2048     return retval;
2049 }
2050
2051 /*
2052  * Handle message from the backend.
2053  */
2054 void backend_response(IOCHAN i, int event)
2055 {
2056     association *assoc = (association *)iochan_getdata(i);
2057     request *req = request_head(&assoc->incoming);
2058     Z_APDU *res;
2059     int fd;
2060
2061     yaz_log(YLOG_DEBUG, "backend_response");
2062     assert(assoc && req && req->state != REQUEST_IDLE);
2063     /* determine what it is we're waiting for */
2064     switch (req->apdu_request->which)
2065     {
2066         case Z_APDU_searchRequest:
2067             res = response_searchRequest(assoc, req, 0, &fd); break;
2068 #if 0
2069         case Z_APDU_presentRequest:
2070             res = response_presentRequest(assoc, req, 0, &fd); break;
2071         case Z_APDU_scanRequest:
2072             res = response_scanRequest(assoc, req, 0, &fd); break;
2073 #endif
2074         default:
2075             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2076             abort();
2077     }
2078     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2079     {
2080         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2081         do_close(assoc, Z_Close_systemProblem, 0);
2082         iochan_destroy(i);
2083         return;
2084     }
2085     else if (!res) /* no result yet - try again later */
2086     {
2087         yaz_log(YLOG_DEBUG, "   no result yet");
2088         iochan_setfd(i, fd); /* in case fd has changed */
2089     }
2090 }
2091
2092 /*
2093  * Encode response, and transfer the request structure to the outgoing queue.
2094  */
2095 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2096 {
2097     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2098
2099     if (assoc->print)
2100     {
2101         if (!z_GDU(assoc->print, &res, 0, 0))
2102             yaz_log(YLOG_WARN, "ODR print error: %s", 
2103                 odr_errmsg(odr_geterror(assoc->print)));
2104         odr_reset(assoc->print);
2105     }
2106     if (!z_GDU(assoc->encode, &res, 0, 0))
2107     {
2108         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2109                 odr_errmsg(odr_geterror(assoc->decode)),
2110                 odr_getelement(assoc->decode));
2111         return -1;
2112     }
2113     req->response = odr_getbuf(assoc->encode, &req->len_response,
2114         &req->size_response);
2115     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2116     odr_reset(assoc->encode);
2117     req->state = REQUEST_IDLE;
2118     request_enq(&assoc->outgoing, req);
2119     /* turn the work over to the ir_session handler */
2120     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2121     assoc->cs_put_mask = EVENT_OUTPUT;
2122     /* Is there more work to be done? give that to the input handler too */
2123     for (;;)
2124     {
2125         req = request_head(&assoc->incoming);
2126         if (req && req->state == REQUEST_IDLE)
2127         {
2128             request_deq(&assoc->incoming);
2129             process_gdu_request(assoc, req);
2130         }
2131         else
2132             break;
2133     }
2134     return 0;
2135 }
2136
2137 /*
2138  * Encode response, and transfer the request structure to the outgoing queue.
2139  */
2140 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2141 {
2142     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2143     gres->which = Z_GDU_Z3950;
2144     gres->u.z3950 = res;
2145
2146     return process_gdu_response(assoc, req, gres);
2147 }
2148
2149 static char *get_vhost(Z_OtherInformation *otherInfo)
2150 {
2151     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2152 }
2153
2154 /*
2155  * Handle init request.
2156  * At the moment, we don't check the options
2157  * anywhere else in the code - we just try not to do anything that would
2158  * break a naive client. We'll toss 'em into the association block when
2159  * we need them there.
2160  */
2161 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2162 {
2163     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2164     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2165     Z_InitResponse *resp = apdu->u.initResponse;
2166     bend_initresult *binitres;
2167     char *version;
2168     char options[140];
2169     statserv_options_block *cb = 0;  /* by default no control for backend */
2170
2171     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2172         cb = statserv_getcontrol();  /* got control block for backend */
2173
2174     if (cb && assoc->backend)
2175         (*cb->bend_close)(assoc->backend);
2176
2177     yaz_log(log_requestdetail, "Got initRequest");
2178     if (req->implementationId)
2179         yaz_log(log_requestdetail, "Id:        %s",
2180                 req->implementationId);
2181     if (req->implementationName)
2182         yaz_log(log_requestdetail, "Name:      %s",
2183                 req->implementationName);
2184     if (req->implementationVersion)
2185         yaz_log(log_requestdetail, "Version:   %s",
2186                 req->implementationVersion);
2187     
2188     assoc_init_reset(assoc);
2189
2190     assoc->init->auth = req->idAuthentication;
2191     assoc->init->referenceId = req->referenceId;
2192
2193     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2194     {
2195         Z_CharSetandLanguageNegotiation *negotiation =
2196             yaz_get_charneg_record (req->otherInfo);
2197         if (negotiation &&
2198             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2199             assoc->init->charneg_request = negotiation;
2200     }
2201
2202     assoc->backend = 0;
2203     if (cb)
2204     {
2205         if (req->implementationVersion)
2206             yaz_log(log_requestdetail, "Config:    %s",
2207                     cb->configname);
2208     
2209         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2210         
2211         /* we have a backend control block, so call that init function */
2212         if (!(binitres = (*cb->bend_init)(assoc->init)))
2213         {
2214             yaz_log(YLOG_WARN, "Bad response from backend.");
2215             return 0;
2216         }
2217         assoc->backend = binitres->handle;
2218     }
2219     else
2220     {
2221         /* no backend. return error */
2222         binitres = (bend_initresult *)
2223             odr_malloc(assoc->encode, sizeof(*binitres));
2224         binitres->errstring = 0;
2225         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2226         iochan_settimeout(assoc->client_chan, 10);
2227     }
2228     if ((assoc->init->bend_sort))
2229         yaz_log(YLOG_DEBUG, "Sort handler installed");
2230     if ((assoc->init->bend_search))
2231         yaz_log(YLOG_DEBUG, "Search handler installed");
2232     if ((assoc->init->bend_present))
2233         yaz_log(YLOG_DEBUG, "Present handler installed");   
2234     if ((assoc->init->bend_esrequest))
2235         yaz_log(YLOG_DEBUG, "ESRequest handler installed");   
2236     if ((assoc->init->bend_delete))
2237         yaz_log(YLOG_DEBUG, "Delete handler installed");   
2238     if ((assoc->init->bend_scan))
2239         yaz_log(YLOG_DEBUG, "Scan handler installed");   
2240     if ((assoc->init->bend_segment))
2241         yaz_log(YLOG_DEBUG, "Segment handler installed");   
2242     
2243     resp->referenceId = req->referenceId;
2244     *options = '\0';
2245     /* let's tell the client what we can do */
2246     if (ODR_MASK_GET(req->options, Z_Options_search))
2247     {
2248         ODR_MASK_SET(resp->options, Z_Options_search);
2249         strcat(options, "srch");
2250     }
2251     if (ODR_MASK_GET(req->options, Z_Options_present))
2252     {
2253         ODR_MASK_SET(resp->options, Z_Options_present);
2254         strcat(options, " prst");
2255     }
2256     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2257         assoc->init->bend_delete)
2258     {
2259         ODR_MASK_SET(resp->options, Z_Options_delSet);
2260         strcat(options, " del");
2261     }
2262     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2263         assoc->init->bend_esrequest)
2264     {
2265         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2266         strcat(options, " extendedServices");
2267     }
2268     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2269     {
2270         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2271         strcat(options, " namedresults");
2272     }
2273     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2274     {
2275         ODR_MASK_SET(resp->options, Z_Options_scan);
2276         strcat(options, " scan");
2277     }
2278     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2279     {
2280         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2281         strcat(options, " concurrop");
2282     }
2283     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2284     {
2285         ODR_MASK_SET(resp->options, Z_Options_sort);
2286         strcat(options, " sort");
2287     }
2288     
2289     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2290     {
2291         Z_OtherInformationUnit *p0;
2292
2293         if (!assoc->init->charneg_response)
2294         {
2295             if (assoc->init->query_charset)
2296             {
2297                 assoc->init->charneg_response = yaz_set_response_charneg(
2298                     assoc->encode, assoc->init->query_charset, 0, 
2299                     assoc->init->records_in_same_charset);
2300             }
2301             else
2302             {
2303                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2304             }
2305         }
2306         if (assoc->init->charneg_response
2307             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2308         {
2309             p0->which = Z_OtherInfo_externallyDefinedInfo;
2310             p0->information.externallyDefinedInfo =
2311                 assoc->init->charneg_response;
2312             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2313             strcat(options, " negotiation");
2314         }
2315     }
2316     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2317         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2318
2319     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2320     {
2321         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2322         assoc->version = 1; /* 1 & 2 are equivalent */
2323     }
2324     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2325     {
2326         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2327         assoc->version = 2;
2328     }
2329     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2330     {
2331         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2332         assoc->version = 3;
2333     }
2334
2335     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2336
2337     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2338         assoc->maximumRecordSize = *req->maximumRecordSize;
2339
2340     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2341         assoc->preferredMessageSize = *req->preferredMessageSize;
2342
2343     resp->preferredMessageSize = &assoc->preferredMessageSize;
2344     resp->maximumRecordSize = &assoc->maximumRecordSize;
2345
2346     resp->implementationId = odr_prepend(assoc->encode,
2347                 assoc->init->implementation_id,
2348                 resp->implementationId);
2349
2350     resp->implementationName = odr_prepend(assoc->encode,
2351                 assoc->init->implementation_name,
2352                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2353
2354     version = odr_strdup(assoc->encode, "$Revision: 1.128 $");
2355     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2356         version[strlen(version)-2] = '\0';
2357     resp->implementationVersion = odr_prepend(assoc->encode,
2358                 assoc->init->implementation_version,
2359                 odr_prepend(assoc->encode, &version[11],
2360                             resp->implementationVersion));
2361
2362     if (binitres->errcode)
2363     {
2364         assoc->state = ASSOC_DEAD;
2365         resp->userInformationField =
2366             init_diagnostics(assoc->encode, binitres->errcode,
2367                              binitres->errstring);
2368         *resp->result = 0;
2369     }
2370     if (log_request)
2371     {
2372         if (!req->idAuthentication)
2373             yaz_log(log_request, "Auth none");
2374         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2375         {
2376             const char *open = req->idAuthentication->u.open;
2377             const char *slash = strchr(open, '/');
2378             int len;
2379             if (slash)
2380                 len = slash - open;
2381             else
2382                 len = strlen(open);
2383                 yaz_log(log_request, "Auth open %.*s", len, open);
2384         }
2385         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2386         {
2387             const char *user = req->idAuthentication->u.idPass->userId;
2388             const char *group = req->idAuthentication->u.idPass->groupId;
2389             yaz_log(log_request, "Auth idPass %s %s",
2390                     user ? user : "-", group ? group : "-");
2391         }
2392         else if (req->idAuthentication->which 
2393                  == Z_IdAuthentication_anonymous)
2394         {
2395             yaz_log(log_request, "Auth anonymous");
2396         }
2397         else
2398         {
2399             yaz_log(log_request, "Auth other");
2400         }
2401     }
2402     if (log_request)
2403     {
2404         WRBUF wr = wrbuf_alloc();
2405         wrbuf_printf(wr, "Init ");
2406         if (binitres->errcode)
2407             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2408         else
2409             wrbuf_printf(wr, "OK -");
2410         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2411                      (req->implementationId ? req->implementationId :"-"), 
2412                      (req->implementationName ?
2413                       req->implementationName : "-"),
2414                      (req->implementationVersion ?
2415                       req->implementationVersion : "-")
2416             );
2417         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2418         wrbuf_destroy(wr);
2419     }
2420     return apdu;
2421 }
2422
2423 /*
2424  * Set the specified `errcode' and `errstring' into a UserInfo-1
2425  * external to be returned to the client in accordance with Z35.90
2426  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2427  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2428  */
2429 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2430 {
2431     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2432         addinfo ? " -- " : "", addinfo ? addinfo : "");
2433     return zget_init_diagnostics(odr, error, addinfo);
2434 }
2435
2436 /*
2437  * nonsurrogate diagnostic record.
2438  */
2439 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2440 {
2441     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2442
2443     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2444             addinfo ? " -- " : "", addinfo ? addinfo : "");
2445
2446     rec->which = Z_Records_NSD;
2447     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2448                                                            error, addinfo);
2449     return rec;
2450 }
2451
2452 /*
2453  * surrogate diagnostic.
2454  */
2455 static Z_NamePlusRecord *surrogatediagrec(association *assoc, 
2456                                           const char *dbname,
2457                                           int error, const char *addinfo)
2458 {
2459     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2460             addinfo ? " -- " : "", addinfo ? addinfo : "");
2461     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2462 }
2463
2464 static Z_Records *pack_records(association *a, char *setname, int start,
2465                                int *num, Z_RecordComposition *comp,
2466                                int *next, int *pres,
2467                                Z_ReferenceId *referenceId,
2468                                Odr_oid *oid, int *errcode)
2469 {
2470     int recno, total_length = 0, toget = *num, dumped_records = 0;
2471     Z_Records *records =
2472         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2473     Z_NamePlusRecordList *reclist =
2474         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2475     Z_NamePlusRecord **list =
2476         (Z_NamePlusRecord **) odr_malloc(a->encode, sizeof(*list) * toget);
2477
2478     records->which = Z_Records_DBOSD;
2479     records->u.databaseOrSurDiagnostics = reclist;
2480     reclist->num_records = 0;
2481     reclist->records = list;
2482     *pres = Z_PresentStatus_success;
2483     *num = 0;
2484     *next = 0;
2485
2486     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2487     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2488         a->maximumRecordSize);
2489     for (recno = start; reclist->num_records < toget; recno++)
2490     {
2491         bend_fetch_rr freq;
2492         Z_NamePlusRecord *thisrec;
2493         int this_length = 0;
2494         /*
2495          * we get the number of bytes allocated on the stream before any
2496          * allocation done by the backend - this should give us a reasonable
2497          * idea of the total size of the data so far.
2498          */
2499         total_length = odr_total(a->encode) - dumped_records;
2500         freq.errcode = 0;
2501         freq.errstring = 0;
2502         freq.basename = 0;
2503         freq.len = 0;
2504         freq.record = 0;
2505         freq.last_in_set = 0;
2506         freq.setname = setname;
2507         freq.surrogate_flag = 0;
2508         freq.number = recno;
2509         freq.comp = comp;
2510         freq.request_format = oid;
2511         freq.output_format = 0;
2512         freq.stream = a->encode;
2513         freq.print = a->print;
2514         freq.referenceId = referenceId;
2515         freq.schema = 0;
2516
2517         retrieve_fetch(a, &freq);
2518
2519         *next = freq.last_in_set ? 0 : recno + 1;
2520
2521         if (freq.errcode)
2522         {
2523             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2524             {
2525                 char s[20];
2526                 *pres = Z_PresentStatus_failure;
2527                 /* for 'present request out of range',
2528                    set addinfo to record position if not set */
2529                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  && 
2530                                 freq.errstring == 0)
2531                 {
2532                     sprintf (s, "%d", recno);
2533                     freq.errstring = s;
2534                 }
2535                 if (errcode)
2536                     *errcode = freq.errcode;
2537                 return diagrec(a, freq.errcode, freq.errstring);
2538             }
2539             reclist->records[reclist->num_records] =
2540                 surrogatediagrec(a, freq.basename, freq.errcode,
2541                                  freq.errstring);
2542             reclist->num_records++;
2543             continue;
2544         }
2545         if (freq.record == 0)  /* no error and no record ? */
2546         {
2547             *next = 0;   /* signal end-of-set and stop */
2548             break;
2549         }
2550         if (freq.len >= 0)
2551             this_length = freq.len;
2552         else
2553             this_length = odr_total(a->encode) - total_length - dumped_records;
2554         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2555             this_length, total_length, dumped_records);
2556         if (a->preferredMessageSize > 0 &&
2557                 this_length + total_length > a->preferredMessageSize)
2558         {
2559             /* record is small enough, really */
2560             if (this_length <= a->preferredMessageSize && recno > start)
2561             {
2562                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2563                 *pres = Z_PresentStatus_partial_2;
2564                 break;
2565             }
2566             /* record can only be fetched by itself */
2567             if (this_length < a->maximumRecordSize)
2568             {
2569                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2570                 if (toget > 1)
2571                 {
2572                     yaz_log(YLOG_DEBUG, "  Dropped it");
2573                     reclist->records[reclist->num_records] =
2574                          surrogatediagrec(a, freq.basename, 16, 0);
2575                     reclist->num_records++;
2576                     dumped_records += this_length;
2577                     continue;
2578                 }
2579             }
2580             else /* too big entirely */
2581             {
2582                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2583                         this_length, a->maximumRecordSize);
2584                 reclist->records[reclist->num_records] =
2585                     surrogatediagrec(a, freq.basename, 17, 0);
2586                 reclist->num_records++;
2587                 dumped_records += this_length;
2588                 continue;
2589             }
2590         }
2591
2592         if (!(thisrec = (Z_NamePlusRecord *)
2593               odr_malloc(a->encode, sizeof(*thisrec))))
2594             return 0;
2595         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2596         thisrec->which = Z_NamePlusRecord_databaseRecord;
2597
2598         if (!freq.output_format)
2599             freq.output_format = freq.request_format;
2600         thisrec->u.databaseRecord = z_ext_record_oid(
2601             a->encode, freq.output_format, freq.record, freq.len);
2602         if (!thisrec->u.databaseRecord)
2603             return 0;
2604         reclist->records[reclist->num_records] = thisrec;
2605         reclist->num_records++;
2606     }
2607     *num = reclist->num_records;
2608     return records;
2609 }
2610
2611 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2612     int *fd)
2613 {
2614     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2615     bend_search_rr *bsrr = 
2616         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2617     
2618     yaz_log(log_requestdetail, "Got SearchRequest.");
2619     bsrr->fd = fd;
2620     bsrr->request = reqb;
2621     bsrr->association = assoc;
2622     bsrr->referenceId = req->referenceId;
2623     save_referenceId (reqb, bsrr->referenceId);
2624     bsrr->srw_sortKeys = 0;
2625     bsrr->srw_setname = 0;
2626     bsrr->srw_setnameIdleTime = 0;
2627     bsrr->estimated_hit_count = 0;
2628     bsrr->partial_resultset = 0;
2629
2630     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2631     if (req->databaseNames)
2632     {
2633         int i;
2634         for (i = 0; i < req->num_databaseNames; i++)
2635             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2636     }
2637
2638     yaz_log_zquery_level(log_requestdetail,req->query);
2639
2640     if (assoc->init->bend_search)
2641     {
2642         bsrr->setname = req->resultSetName;
2643         bsrr->replace_set = *req->replaceIndicator;
2644         bsrr->num_bases = req->num_databaseNames;
2645         bsrr->basenames = req->databaseNames;
2646         bsrr->query = req->query;
2647         bsrr->stream = assoc->encode;
2648         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2649         bsrr->decode = assoc->decode;
2650         bsrr->print = assoc->print;
2651         bsrr->hits = 0;
2652         bsrr->errcode = 0;
2653         bsrr->errstring = NULL;
2654         bsrr->search_info = NULL;
2655
2656         if (assoc->server && assoc->server->cql_transform 
2657             && req->query->which == Z_Query_type_104
2658             && req->query->u.type_104->which == Z_External_CQL)
2659         {
2660             /* have a CQL query and a CQL to PQF transform .. */
2661             int srw_errcode = 
2662                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2663                         assoc->server->cql_transform, bsrr->query);
2664             if (srw_errcode)
2665                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2666         }
2667
2668         if (assoc->server && assoc->server->ccl_transform 
2669             && req->query->which == Z_Query_type_2) /*CCL*/
2670         {
2671             /* have a CCL query and a CCL to PQF transform .. */
2672             int srw_errcode = 
2673                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2674                         assoc->server->ccl_transform, bsrr);
2675             if (srw_errcode)
2676                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2677         }
2678
2679         if (!bsrr->errcode)
2680             (assoc->init->bend_search)(assoc->backend, bsrr);
2681         if (!bsrr->request)  /* backend not ready with the search response */
2682             return 0;  /* should not be used any more */
2683     }
2684     else
2685     { 
2686         /* FIXME - make a diagnostic for it */
2687         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2688     }
2689     return response_searchRequest(assoc, reqb, bsrr, fd);
2690 }
2691
2692 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2693
2694 /*
2695  * Prepare a searchresponse based on the backend results. We probably want
2696  * to look at making the fetching of records nonblocking as well, but
2697  * so far, we'll keep things simple.
2698  * If bsrt is null, that means we're called in response to a communications
2699  * event, and we'll have to get the response for ourselves.
2700  */
2701 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2702     bend_search_rr *bsrt, int *fd)
2703 {
2704     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2705     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2706     Z_SearchResponse *resp = (Z_SearchResponse *)
2707         odr_malloc(assoc->encode, sizeof(*resp));
2708     int *nulint = odr_intdup(assoc->encode, 0);
2709     int *next = odr_intdup(assoc->encode, 0);
2710     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2711     int returnedrecs = 0;
2712
2713     apdu->which = Z_APDU_searchResponse;
2714     apdu->u.searchResponse = resp;
2715     resp->referenceId = req->referenceId;
2716     resp->additionalSearchInfo = 0;
2717     resp->otherInfo = 0;
2718     *fd = -1;
2719     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2720     {
2721         yaz_log(YLOG_FATAL, "Bad result from backend");
2722         return 0;
2723     }
2724     else if (bsrt->errcode)
2725     {
2726         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2727         resp->resultCount = nulint;
2728         resp->numberOfRecordsReturned = nulint;
2729         resp->nextResultSetPosition = nulint;
2730         resp->searchStatus = nulint;
2731         resp->resultSetStatus = none;
2732         resp->presentStatus = 0;
2733     }
2734     else
2735     {
2736         bool_t *sr = odr_intdup(assoc->encode, 1);
2737         int *toget = odr_intdup(assoc->encode, 0);
2738         Z_RecordComposition comp, *compp = 0;
2739
2740         yaz_log(log_requestdetail, "resultCount: %d", bsrt->hits);
2741
2742         resp->records = 0;
2743         resp->resultCount = &bsrt->hits;
2744
2745         comp.which = Z_RecordComp_simple;
2746         /* how many records does the user agent want, then? */
2747         if (bsrt->hits <= *req->smallSetUpperBound)
2748         {
2749             *toget = bsrt->hits;
2750             if ((comp.u.simple = req->smallSetElementSetNames))
2751                 compp = &comp;
2752         }
2753         else if (bsrt->hits < *req->largeSetLowerBound)
2754         {
2755             *toget = *req->mediumSetPresentNumber;
2756             if (*toget > bsrt->hits)
2757                 *toget = bsrt->hits;
2758             if ((comp.u.simple = req->mediumSetElementSetNames))
2759                 compp = &comp;
2760         }
2761         else
2762             *toget = 0;
2763
2764         if (*toget && !resp->records)
2765         {
2766             int *presst = odr_intdup(assoc->encode, 0);
2767             /* Call bend_present if defined */
2768             if (assoc->init->bend_present)
2769             {
2770                 bend_present_rr *bprr = (bend_present_rr *)
2771                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2772                 bprr->setname = req->resultSetName;
2773                 bprr->start = 1;
2774                 bprr->number = *toget;
2775                 bprr->format = req->preferredRecordSyntax;
2776                 bprr->comp = compp;
2777                 bprr->referenceId = req->referenceId;
2778                 bprr->stream = assoc->encode;
2779                 bprr->print = assoc->print;
2780                 bprr->request = reqb;
2781                 bprr->association = assoc;
2782                 bprr->errcode = 0;
2783                 bprr->errstring = NULL;
2784                 (*assoc->init->bend_present)(assoc->backend, bprr);
2785
2786                 if (!bprr->request)
2787                     return 0;
2788                 if (bprr->errcode)
2789                 {
2790                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2791                     *resp->presentStatus = Z_PresentStatus_failure;
2792                 }
2793             }
2794
2795             if (!resp->records)
2796                 resp->records = pack_records(
2797                     assoc, req->resultSetName, 1,
2798                     toget, compp, next, presst, req->referenceId,
2799                     req->preferredRecordSyntax, NULL);
2800             if (!resp->records)
2801                 return 0;
2802             resp->numberOfRecordsReturned = toget;
2803             returnedrecs = *toget;
2804             resp->presentStatus = presst;
2805         }
2806         else
2807         {
2808             if (*resp->resultCount)
2809                 *next = 1;
2810             resp->numberOfRecordsReturned = nulint;
2811             resp->presentStatus = 0;
2812         }
2813         resp->nextResultSetPosition = next;
2814         resp->searchStatus = sr;
2815         resp->resultSetStatus = 0;
2816         if (bsrt->estimated_hit_count)
2817         {
2818             resp->resultSetStatus = odr_intdup(assoc->encode, 
2819                                                Z_SearchResponse_estimate);
2820         }
2821         else if (bsrt->partial_resultset)
2822         {
2823             resp->resultSetStatus = odr_intdup(assoc->encode, 
2824                                                Z_SearchResponse_subset);
2825         }
2826     }
2827     resp->additionalSearchInfo = bsrt->search_info;
2828
2829     if (log_request)
2830     {
2831         int i;
2832         WRBUF wr = wrbuf_alloc();
2833
2834         for (i = 0 ; i < req->num_databaseNames; i++){
2835             if (i)
2836                 wrbuf_printf(wr, "+");
2837             wrbuf_puts(wr, req->databaseNames[i]);
2838         }
2839         wrbuf_printf(wr, " ");
2840         
2841         if (bsrt->errcode)
2842             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2843         else
2844             wrbuf_printf(wr, "OK %d", bsrt->hits);
2845         wrbuf_printf(wr, " %s 1+%d ",
2846                      req->resultSetName, returnedrecs);
2847         yaz_query_to_wrbuf(wr, req->query);
2848         
2849         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2850         wrbuf_destroy(wr);
2851     }
2852     return apdu;
2853 }
2854
2855 /*
2856  * Maybe we got a little over-friendly when we designed bend_fetch to
2857  * get only one record at a time. Some backends can optimise multiple-record
2858  * fetches, and at any rate, there is some overhead involved in
2859  * all that selecting and hopping around. Problem is, of course, that the
2860  * frontend can't know ahead of time how many records it'll need to
2861  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2862  * is downright lousy as a bulk data transfer protocol.
2863  *
2864  * To start with, we'll do the fetching of records from the backend
2865  * in one operation: To save some trips in and out of the event-handler,
2866  * and to simplify the interface to pack_records. At any rate, asynch
2867  * operation is more fun in operations that have an unpredictable execution
2868  * speed - which is normally more true for search than for present.
2869  */
2870 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2871                                       int *fd)
2872 {
2873     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2874     Z_APDU *apdu;
2875     Z_PresentResponse *resp;
2876     int *next;
2877     int *num;
2878     int errcode = 0;
2879     const char *errstring = 0;
2880
2881     yaz_log(log_requestdetail, "Got PresentRequest.");
2882
2883     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2884     resp->records = 0;
2885     resp->presentStatus = odr_intdup(assoc->encode, 0);
2886     if (assoc->init->bend_present)
2887     {
2888         bend_present_rr *bprr = (bend_present_rr *)
2889             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2890         bprr->setname = req->resultSetId;
2891         bprr->start = *req->resultSetStartPoint;
2892         bprr->number = *req->numberOfRecordsRequested;
2893         bprr->format = req->preferredRecordSyntax;
2894         bprr->comp = req->recordComposition;
2895         bprr->referenceId = req->referenceId;
2896         bprr->stream = assoc->encode;
2897         bprr->print = assoc->print;
2898         bprr->request = reqb;
2899         bprr->association = assoc;
2900         bprr->errcode = 0;
2901         bprr->errstring = NULL;
2902         (*assoc->init->bend_present)(assoc->backend, bprr);
2903         
2904         if (!bprr->request)
2905             return 0; /* should not happen */
2906         if (bprr->errcode)
2907         {
2908             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2909             *resp->presentStatus = Z_PresentStatus_failure;
2910             errcode = bprr->errcode;
2911             errstring = bprr->errstring;
2912         }
2913     }
2914     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2915     next = odr_intdup(assoc->encode, 0);
2916     num = odr_intdup(assoc->encode, 0);
2917     
2918     apdu->which = Z_APDU_presentResponse;
2919     apdu->u.presentResponse = resp;
2920     resp->referenceId = req->referenceId;
2921     resp->otherInfo = 0;
2922     
2923     if (!resp->records)
2924     {
2925         *num = *req->numberOfRecordsRequested;
2926         resp->records =
2927             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2928                          num, req->recordComposition, next,
2929                          resp->presentStatus,
2930                          req->referenceId, req->preferredRecordSyntax, 
2931                          &errcode);
2932     }
2933     if (log_request)
2934     {
2935         WRBUF wr = wrbuf_alloc();
2936         wrbuf_printf(wr, "Present ");
2937
2938         if (*resp->presentStatus == Z_PresentStatus_failure)
2939             wrbuf_printf(wr, "ERROR %d ", errcode);
2940         else if (*resp->presentStatus == Z_PresentStatus_success)
2941             wrbuf_printf(wr, "OK -  ");
2942         else
2943             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2944
2945         wrbuf_printf(wr, " %s %d+%d ",
2946                 req->resultSetId, *req->resultSetStartPoint,
2947                 *req->numberOfRecordsRequested);
2948         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2949         wrbuf_destroy(wr);
2950     }
2951     if (!resp->records)
2952         return 0;
2953     resp->numberOfRecordsReturned = num;
2954     resp->nextResultSetPosition = next;
2955     
2956     return apdu;
2957 }
2958
2959 /*
2960  * Scan was implemented rather in a hurry, and with support for only the basic
2961  * elements of the service in the backend API. Suggestions are welcome.
2962  */
2963 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2964 {
2965     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2966     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2967     Z_ScanResponse *res = (Z_ScanResponse *)
2968         odr_malloc(assoc->encode, sizeof(*res));
2969     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2970     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2971     Z_ListEntries *ents = (Z_ListEntries *)
2972         odr_malloc(assoc->encode, sizeof(*ents));
2973     Z_DiagRecs *diagrecs_p = NULL;
2974     bend_scan_rr *bsrr = (bend_scan_rr *)
2975         odr_malloc(assoc->encode, sizeof(*bsrr));
2976     struct scan_entry *save_entries;
2977
2978     yaz_log(log_requestdetail, "Got ScanRequest");
2979
2980     apdu->which = Z_APDU_scanResponse;
2981     apdu->u.scanResponse = res;
2982     res->referenceId = req->referenceId;
2983
2984     /* if step is absent, set it to 0 */
2985     res->stepSize = odr_intdup(assoc->encode, 0);
2986     if (req->stepSize)
2987         *res->stepSize = *req->stepSize;
2988
2989     res->scanStatus = scanStatus;
2990     res->numberOfEntriesReturned = numberOfEntriesReturned;
2991     res->positionOfTerm = 0;
2992     res->entries = ents;
2993     ents->num_entries = 0;
2994     ents->entries = NULL;
2995     ents->num_nonsurrogateDiagnostics = 0;
2996     ents->nonsurrogateDiagnostics = NULL;
2997     res->attributeSet = 0;
2998     res->otherInfo = 0;
2999
3000     if (req->databaseNames)
3001     {
3002         int i;
3003         for (i = 0; i < req->num_databaseNames; i++)
3004             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3005     }
3006     bsrr->scanClause = 0;
3007     bsrr->errcode = 0;
3008     bsrr->errstring = 0;
3009     bsrr->num_bases = req->num_databaseNames;
3010     bsrr->basenames = req->databaseNames;
3011     bsrr->num_entries = *req->numberOfTermsRequested;
3012     bsrr->term = req->termListAndStartPoint;
3013     bsrr->referenceId = req->referenceId;
3014     bsrr->stream = assoc->encode;
3015     bsrr->print = assoc->print;
3016     bsrr->step_size = res->stepSize;
3017     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo, 
3018                                           yaz_oid_userinfo_scan_set, 1, 0);
3019     bsrr->entries = 0;
3020     /* For YAZ 2.0 and earlier it was the backend handler that
3021        initialized entries (member display_term did not exist)
3022        YAZ 2.0 and later sets 'entries'  and initialize all members
3023        including 'display_term'. If YAZ 2.0 or later sees that
3024        entries was modified - we assume that it is an old handler and
3025        that 'display_term' is _not_ set.
3026     */
3027     if (bsrr->num_entries > 0) 
3028     {
3029         int i;
3030         bsrr->entries = (struct scan_entry *)
3031             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3032                        bsrr->num_entries);
3033         for (i = 0; i<bsrr->num_entries; i++)
3034         {
3035             bsrr->entries[i].term = 0;
3036             bsrr->entries[i].occurrences = 0;
3037             bsrr->entries[i].errcode = 0;
3038             bsrr->entries[i].errstring = 0;
3039             bsrr->entries[i].display_term = 0;
3040         }
3041     }
3042     save_entries = bsrr->entries;  /* save it so we can compare later */
3043
3044     bsrr->attributeset = req->attributeSet;
3045     log_scan_term_level(log_requestdetail, req->termListAndStartPoint, 
3046                         bsrr->attributeset);
3047     bsrr->term_position = req->preferredPositionInResponse ?
3048         *req->preferredPositionInResponse : 1;
3049
3050     ((int (*)(void *, bend_scan_rr *))
3051      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3052
3053     if (bsrr->errcode)
3054         diagrecs_p = zget_DiagRecs(assoc->encode,
3055                                    bsrr->errcode, bsrr->errstring);
3056     else
3057     {
3058         int i;
3059         Z_Entry **tab = (Z_Entry **)
3060             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3061         
3062         if (bsrr->status == BEND_SCAN_PARTIAL)
3063             *scanStatus = Z_Scan_partial_5;
3064         else
3065             *scanStatus = Z_Scan_success;
3066         ents->entries = tab;
3067         ents->num_entries = bsrr->num_entries;
3068         res->numberOfEntriesReturned = &ents->num_entries;          
3069         res->positionOfTerm = &bsrr->term_position;
3070         for (i = 0; i < bsrr->num_entries; i++)
3071         {
3072             Z_Entry *e;
3073             Z_TermInfo *t;
3074             Odr_oct *o;
3075             
3076             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3077             if (bsrr->entries[i].occurrences >= 0)
3078             {
3079                 e->which = Z_Entry_termInfo;
3080                 e->u.termInfo = t = (Z_TermInfo *)
3081                     odr_malloc(assoc->encode, sizeof(*t));
3082                 t->suggestedAttributes = 0;
3083                 t->displayTerm = 0;
3084                 if (save_entries == bsrr->entries && 
3085                     bsrr->entries[i].display_term)
3086                 {
3087                     /* the entries was _not_ set by the handler. So it's
3088                        safe to test for new member display_term. It is
3089                        NULL'ed by us.
3090                     */
3091                     t->displayTerm = odr_strdup(assoc->encode,
3092                                                 bsrr->entries[i].display_term);
3093                 }
3094                 t->alternativeTerm = 0;
3095                 t->byAttributes = 0;
3096                 t->otherTermInfo = 0;
3097                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3098                 t->term = (Z_Term *)
3099                     odr_malloc(assoc->encode, sizeof(*t->term));
3100                 t->term->which = Z_Term_general;
3101                 t->term->u.general = o =
3102                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3103                 o->buf = (unsigned char *)
3104                     odr_malloc(assoc->encode, o->len = o->size =
3105                                strlen(bsrr->entries[i].term));
3106                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3107                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3108                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3109             }
3110             else
3111             {
3112                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3113                                                   bsrr->entries[i].errcode,
3114                                                   bsrr->entries[i].errstring);
3115                 assert(drecs->num_diagRecs == 1);
3116                 e->which = Z_Entry_surrogateDiagnostic;
3117                 assert(drecs->diagRecs[0]);
3118                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3119             }
3120         }
3121     }
3122     if (diagrecs_p)
3123     {
3124         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3125         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3126     }
3127     if (log_request)
3128     {
3129         int i;
3130         WRBUF wr = wrbuf_alloc();
3131         wrbuf_printf(wr, "Scan ");
3132         for (i = 0 ; i < req->num_databaseNames; i++)
3133         {
3134             if (i)
3135                 wrbuf_printf(wr, "+");
3136             wrbuf_puts(wr, req->databaseNames[i]);
3137         }
3138
3139         wrbuf_printf(wr, " ");
3140         
3141         if (bsrr->errcode)
3142             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3143         else
3144             wrbuf_printf(wr, "OK"); 
3145
3146         wrbuf_printf(wr, " %d - %d+%d+%d",
3147                      res->numberOfEntriesReturned ?
3148                      *res->numberOfEntriesReturned : 0,
3149                      (req->preferredPositionInResponse ?
3150                       *req->preferredPositionInResponse : 1),
3151                      *req->numberOfTermsRequested,
3152                      (res->stepSize ? *res->stepSize : 1));
3153         
3154         if (bsrr->setname)
3155             wrbuf_printf(wr, "+%s", bsrr->setname);
3156
3157         wrbuf_printf(wr, " ");
3158         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint, 
3159                           bsrr->attributeset);
3160         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3161         wrbuf_destroy(wr);
3162     }
3163     return apdu;
3164 }
3165
3166 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3167     int *fd)
3168 {
3169     int i;
3170     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3171     Z_SortResponse *res = (Z_SortResponse *)
3172         odr_malloc(assoc->encode, sizeof(*res));
3173     bend_sort_rr *bsrr = (bend_sort_rr *)
3174         odr_malloc(assoc->encode, sizeof(*bsrr));
3175
3176     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3177
3178     yaz_log(log_requestdetail, "Got SortRequest.");
3179
3180     bsrr->num_input_setnames = req->num_inputResultSetNames;
3181     for (i=0;i<req->num_inputResultSetNames;i++)
3182         yaz_log(log_requestdetail, "Input resultset: '%s'",
3183                 req->inputResultSetNames[i]);
3184     bsrr->input_setnames = req->inputResultSetNames;
3185     bsrr->referenceId = req->referenceId;
3186     bsrr->output_setname = req->sortedResultSetName;
3187     yaz_log(log_requestdetail, "Output resultset: '%s'",
3188                 req->sortedResultSetName);
3189     bsrr->sort_sequence = req->sortSequence;
3190        /*FIXME - dump those sequences too */
3191     bsrr->stream = assoc->encode;
3192     bsrr->print = assoc->print;
3193
3194     bsrr->sort_status = Z_SortResponse_failure;
3195     bsrr->errcode = 0;
3196     bsrr->errstring = 0;
3197     
3198     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3199     
3200     res->referenceId = bsrr->referenceId;
3201     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3202     res->resultSetStatus = 0;
3203     if (bsrr->errcode)
3204     {
3205         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3206                                        bsrr->errcode, bsrr->errstring);
3207         res->diagnostics = dr->diagRecs;
3208         res->num_diagnostics = dr->num_diagRecs;
3209     }
3210     else
3211     {
3212         res->num_diagnostics = 0;
3213         res->diagnostics = 0;
3214     }
3215     res->resultCount = 0;
3216     res->otherInfo = 0;
3217
3218     apdu->which = Z_APDU_sortResponse;
3219     apdu->u.sortResponse = res;
3220     if (log_request)
3221     {
3222         WRBUF wr = wrbuf_alloc();
3223         wrbuf_printf(wr, "Sort ");
3224         if (bsrr->errcode)
3225             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3226         else
3227             wrbuf_printf(wr,  "OK -");
3228         wrbuf_printf(wr, " (");
3229         for (i = 0; i<req->num_inputResultSetNames; i++)
3230         {
3231             if (i)
3232                 wrbuf_printf(wr, "+");
3233             wrbuf_puts(wr, req->inputResultSetNames[i]);
3234         }
3235         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3236
3237         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3238         wrbuf_destroy(wr);
3239     }
3240     return apdu;
3241 }
3242
3243 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3244     int *fd)
3245 {
3246     int i;
3247     Z_DeleteResultSetRequest *req =
3248         reqb->apdu_request->u.deleteResultSetRequest;
3249     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3250         odr_malloc(assoc->encode, sizeof(*res));
3251     bend_delete_rr *bdrr = (bend_delete_rr *)
3252         odr_malloc(assoc->encode, sizeof(*bdrr));
3253     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3254
3255     yaz_log(log_requestdetail, "Got DeleteRequest.");
3256
3257     bdrr->num_setnames = req->num_resultSetList;
3258     bdrr->setnames = req->resultSetList;
3259     for (i = 0; i<req->num_resultSetList; i++)
3260         yaz_log(log_requestdetail, "resultset: '%s'",
3261                 req->resultSetList[i]);
3262     bdrr->stream = assoc->encode;
3263     bdrr->print = assoc->print;
3264     bdrr->function = *req->deleteFunction;
3265     bdrr->referenceId = req->referenceId;
3266     bdrr->statuses = 0;
3267     if (bdrr->num_setnames > 0)
3268     {
3269         bdrr->statuses = (int*) 
3270             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3271                        bdrr->num_setnames);
3272         for (i = 0; i < bdrr->num_setnames; i++)
3273             bdrr->statuses[i] = 0;
3274     }
3275     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3276     
3277     res->referenceId = req->referenceId;
3278
3279     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3280
3281     res->deleteListStatuses = 0;
3282     if (bdrr->num_setnames > 0)
3283     {
3284         int i;
3285         res->deleteListStatuses = (Z_ListStatuses *)
3286             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3287         res->deleteListStatuses->num = bdrr->num_setnames;
3288         res->deleteListStatuses->elements =
3289             (Z_ListStatus **)
3290             odr_malloc(assoc->encode, 
3291                         sizeof(*res->deleteListStatuses->elements) *
3292                         bdrr->num_setnames);
3293         for (i = 0; i<bdrr->num_setnames; i++)
3294         {
3295             res->deleteListStatuses->elements[i] =
3296                 (Z_ListStatus *)
3297                 odr_malloc(assoc->encode,
3298                             sizeof(**res->deleteListStatuses->elements));
3299             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3300             res->deleteListStatuses->elements[i]->id =
3301                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3302         }
3303     }
3304     res->numberNotDeleted = 0;
3305     res->bulkStatuses = 0;
3306     res->deleteMessage = 0;
3307     res->otherInfo = 0;
3308
3309     apdu->which = Z_APDU_deleteResultSetResponse;
3310     apdu->u.deleteResultSetResponse = res;
3311     if (log_request)
3312     {
3313         WRBUF wr = wrbuf_alloc();
3314         wrbuf_printf(wr, "Delete ");
3315         if (bdrr->delete_status)
3316             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3317         else
3318             wrbuf_printf(wr, "OK -");
3319         for (i = 0; i<req->num_resultSetList; i++)
3320             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3321         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3322         wrbuf_destroy(wr);
3323     }
3324     return apdu;
3325 }
3326
3327 static void process_close(association *assoc, request *reqb)
3328 {
3329     Z_Close *req = reqb->apdu_request->u.close;
3330     static char *reasons[] =
3331     {
3332         "finished",
3333         "shutdown",
3334         "systemProblem",
3335         "costLimit",
3336         "resources",
3337         "securityViolation",
3338         "protocolError",
3339         "lackOfActivity",
3340         "peerAbort",
3341         "unspecified"
3342     };
3343
3344     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3345         reasons[*req->closeReason], req->diagnosticInformation ?
3346         req->diagnosticInformation : "NULL");
3347     if (assoc->version < 3) /* to make do_force respond with close */
3348         assoc->version = 3;
3349     do_close_req(assoc, Z_Close_finished,
3350                  "Association terminated by client", reqb);
3351     yaz_log(log_request,"Close OK");
3352 }
3353
3354 void save_referenceId(request *reqb, Z_ReferenceId *refid)
3355 {
3356     if (refid)
3357     {
3358         reqb->len_refid = refid->len;
3359         reqb->refid = (char *)nmem_malloc(reqb->request_mem, refid->len);
3360         memcpy(reqb->refid, refid->buf, refid->len);
3361     }
3362     else
3363     {
3364         reqb->len_refid = 0;
3365         reqb->refid = NULL;
3366     }
3367 }
3368
3369 void bend_request_send(bend_association a, bend_request req, Z_APDU *res)
3370 {
3371     process_z_response(a, req, res);
3372 }
3373
3374 bend_request bend_request_mk(bend_association a)
3375 {
3376     request *nreq = request_get(&a->outgoing);
3377     nreq->request_mem = nmem_create();
3378     return nreq;
3379 }
3380
3381 Z_ReferenceId *bend_request_getid(ODR odr, bend_request req)
3382 {
3383     Z_ReferenceId *id;
3384     if (!req->refid)
3385         return 0;
3386     id = (Odr_oct *)odr_malloc(odr, sizeof(*odr));
3387     id->buf = (unsigned char *)odr_malloc(odr, req->len_refid);
3388     id->len = id->size = req->len_refid;
3389     memcpy(id->buf, req->refid, req->len_refid);
3390     return id;
3391 }
3392
3393 void bend_request_destroy(bend_request *req)
3394 {
3395     nmem_destroy((*req)->request_mem);
3396     request_release(*req);
3397     *req = NULL;
3398 }
3399
3400 int bend_backend_respond(bend_association a, bend_request req)
3401 {
3402     char *msg;
3403     int r;
3404     r = process_z_request(a, req, &msg);
3405     if (r < 0)
3406         yaz_log(YLOG_WARN, "%s", msg);
3407     return r;
3408 }
3409
3410 void bend_request_setdata(bend_request r, void *p)
3411 {
3412     r->clientData = p;
3413 }
3414
3415 void *bend_request_getdata(bend_request r)