src/zoom-c.c

   1 /*
   2  * Copyright (c) 2000-2004, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: zoom-c.c,v 1.34 2004-12-21 00:34:31 adam Exp $
   6  */
   7 /**
   8  * \file zoom-c.c
   9  * \brief Implements ZOOM C interface.
  10  */
  11
  12 #include <assert.h>
  13 #include <string.h>
  14 #include "zoom-p.h"
  15
  16 #include <yaz/yaz-util.h>
  17 #include <yaz/xmalloc.h>
  18 #include <yaz/otherinfo.h>
  19 #include <yaz/log.h>
  20 #include <yaz/pquery.h>
  21 #include <yaz/marcdisp.h>
  22 #include <yaz/diagbib1.h>
  23 #include <yaz/charneg.h>
  24 #include <yaz/ill.h>
  25 #include <yaz/srw.h>
  26
  27 #if HAVE_SYS_POLL_H
  28 #include <sys/poll.h>
  29 #endif
  30
  31 static int log_level=0;
  32 static int log_level_initialized=0;
  33
  34 typedef enum {
  35     zoom_pending,
  36     zoom_complete
  37 } zoom_ret;
  38
  39 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  40 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  41
  42 static ZOOM_Event ZOOM_Event_create (int kind)
  43 {
  44     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  45     event->kind = kind;
  46     event->next = 0;
  47     event->prev = 0;
  48     return event;
  49 }
  50
  51 static void ZOOM_Event_destroy (ZOOM_Event event)
  52 {
  53     xfree (event);
  54 }
  55
  56 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  57 {
  58     if (c->m_queue_back)
  59     {
  60         c->m_queue_back->prev = event;
  61         assert (c->m_queue_front);
  62     }
  63     else
  64     {
  65         assert (!c->m_queue_front);
  66         c->m_queue_front = event;
  67     }
  68     event->next = c->m_queue_back;
  69     event->prev = 0;
  70     c->m_queue_back = event;
  71 }
  72
  73 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  74 {
  75     ZOOM_Event event = c->m_queue_front;
  76     if (!event)
  77     {
  78         c->last_event = ZOOM_EVENT_NONE;
  79         return 0;
  80     }
  81     assert (c->m_queue_back);
  82     c->m_queue_front = event->prev;
  83     if (c->m_queue_front)
  84     {
  85         assert (c->m_queue_back);
  86         c->m_queue_front->next = 0;
  87     }
  88     else
  89         c->m_queue_back = 0;
  90     c->last_event = event->kind;
  91     return event;
  92 }
  93
  94
  95 static void set_dset_error (ZOOM_connection c, int error,
  96                             const char *dset,
  97                             const char *addinfo, const char *addinfo2)
  98 {
  99     char *cp;
 100     if (!log_level_initialized)
 101     {
 102         log_level=yaz_log_module_level("zoom");
 103         log_level_initialized=1;
 104     }
 105
 106     xfree (c->addinfo);
 107     c->addinfo = 0;
 108     c->error = error;
 109     if (!c->diagset || strcmp(dset, c->diagset))
 110     {
 111         xfree(c->diagset);
 112         c->diagset = xstrdup(dset);
 113         /* remove integer part from SRW diagset .. */
 114         if ((cp = strrchr(c->diagset, '/')))
 115            *cp = '\0';
 116     }
 117     if (addinfo && addinfo2)
 118     {
 119         c->addinfo = (char*) xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
 120         strcpy(c->addinfo, addinfo);
 121         strcat(c->addinfo, addinfo2);
 122     }
 123     else if (addinfo)
 124         c->addinfo = xstrdup(addinfo);
 125     if (error)
 126         yaz_log(log_level, "Error %s %s:%d %s %s",
 127                 c->host_port ? c->host_port : "<>", dset, error,
 128                 addinfo ? addinfo : "",
 129                 addinfo2 ? addinfo2 : "");
 130 }
 131
 132 #if HAVE_XML2
 133 static void set_HTTP_error (ZOOM_connection c, int error,
 134                             const char *addinfo, const char *addinfo2)
 135 {
 136     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 137 }
 138 #endif
 139
 140 static void set_ZOOM_error (ZOOM_connection c, int error,
 141                             const char *addinfo)
 142 {
 143     set_dset_error(c, error, "ZOOM", addinfo, 0);
 144 }
 145
 146 static void clear_error (ZOOM_connection c)
 147 {
 148
 149     switch (c->error)
 150     {
 151     case ZOOM_ERROR_CONNECT:
 152     case ZOOM_ERROR_MEMORY:
 153     case ZOOM_ERROR_DECODE:
 154     case ZOOM_ERROR_CONNECTION_LOST:
 155     case ZOOM_ERROR_INIT:
 156     case ZOOM_ERROR_INTERNAL:
 157     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 158         break;
 159     default:
 160         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 161     }
 162 }
 163
 164 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 165 {
 166     ZOOM_task *taskp = &c->tasks;
 167     while (*taskp)
 168         taskp = &(*taskp)->next;
 169     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 170     (*taskp)->running = 0;
 171     (*taskp)->which = which;
 172     (*taskp)->next = 0;
 173     clear_error (c);
 174     return *taskp;
 175 }
 176
 177 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 178 {
 179     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 180
 181     task->next = c->tasks;
 182     c->tasks = task;
 183
 184     task->running = 0;
 185     task->which = which;
 186     clear_error (c);
 187     return task;
 188 }
 189
 190 void ZOOM_connection_remove_task (ZOOM_connection c)
 191 {
 192     ZOOM_task task = c->tasks;
 193
 194     if (task)
 195     {
 196         c->tasks = task->next;
 197         switch (task->which)
 198         {
 199         case ZOOM_TASK_SEARCH:
 200             ZOOM_resultset_destroy (task->u.search.resultset);
 201             break;
 202         case ZOOM_TASK_RETRIEVE:
 203             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 204             break;
 205         case ZOOM_TASK_CONNECT:
 206             break;
 207         case ZOOM_TASK_SCAN:
 208             ZOOM_scanset_destroy (task->u.scan.scan);
 209             break;
 210         case ZOOM_TASK_PACKAGE:
 211             ZOOM_package_destroy (task->u.package);
 212             break;
 213         case ZOOM_TASK_SORT:
 214             ZOOM_resultset_destroy (task->u.sort.resultset);
 215             ZOOM_query_destroy(task->u.sort.q);
 216             break;
 217         default:
 218             assert (0);
 219         }
 220         xfree (task);
 221     }
 222 }
 223
 224 static int ZOOM_connection_exec_task (ZOOM_connection c);
 225
 226 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 227 {
 228     while (c->tasks)
 229         ZOOM_connection_remove_task(c);
 230 }
 231
 232 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 233
 234 ZOOM_API(ZOOM_connection)
 235 ZOOM_connection_create (ZOOM_options options)
 236 {
 237     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 238
 239     if (!log_level_initialized)
 240     {
 241         log_level=yaz_log_module_level("zoom");
 242         log_level_initialized=1;
 243     }
 244
 245     c->proto = PROTO_Z3950;
 246     c->cs = 0;
 247     c->mask = 0;
 248     c->reconnect_ok = 0;
 249     c->state = STATE_IDLE;
 250     c->addinfo = 0;
 251     c->diagset = 0;
 252     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 253     c->buf_in = 0;
 254     c->len_in = 0;
 255     c->buf_out = 0;
 256     c->len_out = 0;
 257     c->resultsets = 0;
 258
 259     c->options = ZOOM_options_create_with_parent(options);
 260
 261     c->host_port = 0;
 262     c->path = 0;
 263     c->proxy = 0;
 264
 265     c->charset = c->lang = 0;
 266
 267     c->cookie_out = 0;
 268     c->cookie_in = 0;
 269     c->client_IP = 0;
 270     c->tasks = 0;
 271
 272     c->odr_in = odr_createmem (ODR_DECODE);
 273     c->odr_out = odr_createmem (ODR_ENCODE);
 274
 275     c->async = 0;
 276     c->support_named_resultsets = 0;
 277     c->last_event = ZOOM_EVENT_NONE;
 278
 279     c->m_queue_front = 0;
 280     c->m_queue_back = 0;
 281     return c;
 282 }
 283
 284 /* set database names. Take local databases (if set); otherwise
 285    take databases given in ZURL (if set); otherwise use Default */
 286 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 287                                  int *num)
 288 {
 289     char **databaseNames;
 290     const char *c;
 291     int no = 2;
 292     const char *cp = ZOOM_options_get (options, "databaseName");
 293
 294     if (!cp || !*cp)
 295     {
 296         if (strncmp (con->host_port, "unix:", 5) == 0)
 297             cp = strchr (con->host_port+5, ':');
 298         else
 299             cp = strchr (con->host_port, '/');
 300         if (cp)
 301             cp++;
 302     }
 303     if (cp)
 304     {
 305         c = cp;
 306         while ((c = strchr(c, '+')))
 307         {
 308             c++;
 309             no++;
 310         }
 311     }
 312     else
 313         cp = "Default";
 314     databaseNames = (char**)
 315         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 316     no = 0;
 317     while (*cp)
 318     {
 319         c = strchr (cp, '+');
 320         if (!c)
 321             c = cp + strlen(cp);
 322         else if (c == cp)
 323         {
 324             cp++;
 325             continue;
 326         }
 327         /* cp ptr to first char of db name, c is char
 328            following db name */
 329         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 330         memcpy (databaseNames[no], cp, c-cp);
 331         databaseNames[no++][c-cp] = '\0';
 332         cp = c;
 333         if (*cp)
 334             cp++;
 335     }
 336     databaseNames[no] = NULL;
 337     *num = no;
 338     return databaseNames;
 339 }
 340
 341 ZOOM_API(ZOOM_connection)
 342 ZOOM_connection_new (const char *host, int portnum)
 343 {
 344     ZOOM_connection c = ZOOM_connection_create (0);
 345
 346     ZOOM_connection_connect (c, host, portnum);
 347     return c;
 348 }
 349
 350 ZOOM_API(void)
 351 ZOOM_connection_connect(ZOOM_connection c,
 352                         const char *host, int portnum)
 353 {
 354     const char *val;
 355     ZOOM_task task;
 356
 357     if (!log_level_initialized)
 358     {
 359         log_level=yaz_log_module_level("zoom");
 360         log_level_initialized=1;
 361     }
 362
 363     if (c->cs)
 364     {
 365         yaz_log (log_level, "reconnect");
 366         c->reconnect_ok = 1;
 367         return;
 368     }
 369     yaz_log(log_level, "connect");
 370     xfree (c->proxy);
 371     val = ZOOM_options_get (c->options, "proxy");
 372     if (val && *val)
 373         c->proxy = xstrdup (val);
 374     else
 375         c->proxy = 0;
 376
 377     xfree (c->charset);
 378     val = ZOOM_options_get (c->options, "charset");
 379     if (val && *val)
 380         c->charset = xstrdup (val);
 381     else
 382         c->charset = 0;
 383
 384     xfree (c->lang);
 385     val = ZOOM_options_get (c->options, "lang");
 386     if (val && *val)
 387         c->lang = xstrdup (val);
 388     else
 389         c->lang = 0;
 390
 391     xfree (c->host_port);
 392     if (portnum)
 393     {
 394         char hostn[128];
 395         sprintf (hostn, "%.80s:%d", host, portnum);
 396         c->host_port = xstrdup(hostn);
 397     }
 398     else
 399         c->host_port = xstrdup(host);
 400
 401     ZOOM_options_set(c->options, "host", c->host_port);
 402
 403     val = ZOOM_options_get (c->options, "cookie");
 404     if (val && *val)
 405         c->cookie_out = xstrdup (val);
 406
 407     val = ZOOM_options_get (c->options, "clientIP");
 408     if (val && *val)
 409         c->client_IP = xstrdup (val);
 410
 411     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 412
 413     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 414
 415     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 416
 417     if (!c->async)
 418     {
 419         while (ZOOM_event (1, &c))
 420             ;
 421     }
 422 }
 423
 424 ZOOM_API(ZOOM_query)
 425 ZOOM_query_create(void)
 426 {
 427     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 428
 429     s->refcount = 1;
 430     s->z_query = 0;
 431     s->sort_spec = 0;
 432     s->odr = odr_createmem (ODR_ENCODE);
 433     s->query_string = 0;
 434
 435     return s;
 436 }
 437
 438 ZOOM_API(void)
 439 ZOOM_query_destroy(ZOOM_query s)
 440 {
 441     if (!s)
 442         return;
 443
 444     (s->refcount)--;
 445     yaz_log (log_level, "ZOOM_query_destroy count=%d", s->refcount);
 446     if (s->refcount == 0)
 447     {
 448         odr_destroy (s->odr);
 449         xfree (s);
 450     }
 451 }
 452
 453 ZOOM_API(int)
 454 ZOOM_query_prefix(ZOOM_query s, const char *str)
 455 {
 456     s->query_string = odr_strdup(s->odr, str);
 457     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 458     s->z_query->which = Z_Query_type_1;
 459     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 460     if (!s->z_query->u.type_1)
 461     {
 462         s->z_query = 0;
 463         return -1;
 464     }
 465     return 0;
 466 }
 467
 468 ZOOM_API(int)
 469 ZOOM_query_cql(ZOOM_query s, const char *str)
 470 {
 471     Z_External *ext;
 472
 473     s->query_string = odr_strdup(s->odr, str);
 474
 475     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 476     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 477     ext->indirect_reference = 0;
 478     ext->descriptor = 0;
 479     ext->which = Z_External_CQL;
 480     ext->u.cql = s->query_string;
 481
 482     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 483     s->z_query->which = Z_Query_type_104;
 484     s->z_query->u.type_104 =  ext;
 485
 486     return 0;
 487 }
 488
 489 ZOOM_API(int)
 490 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 491 {
 492     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 493     if (!s->sort_spec)
 494         return -1;
 495     return 0;
 496 }
 497
 498 static zoom_ret do_write(ZOOM_connection c);
 499
 500 ZOOM_API(void)
 501 ZOOM_connection_destroy(ZOOM_connection c)
 502 {
 503     ZOOM_resultset r;
 504     if (!c)
 505         return;
 506     if (c->cs)
 507         cs_close (c->cs);
 508     for (r = c->resultsets; r; r = r->next)
 509         r->connection = 0;
 510
 511     xfree (c->buf_in);
 512     xfree (c->addinfo);
 513     xfree (c->diagset);
 514     odr_destroy (c->odr_in);
 515     odr_destroy (c->odr_out);
 516     ZOOM_options_destroy (c->options);
 517     ZOOM_connection_remove_tasks (c);
 518     xfree (c->host_port);
 519     xfree (c->path);
 520     xfree (c->proxy);
 521     xfree (c->charset);
 522     xfree (c->lang);
 523     xfree (c->cookie_out);
 524     xfree (c->cookie_in);
 525     xfree (c->client_IP);
 526     xfree (c);
 527 }
 528
 529 void ZOOM_resultset_addref (ZOOM_resultset r)
 530 {
 531     if (r)
 532     {
 533         (r->refcount)++;
 534         yaz_log (log_level, "ZOOM_resultset_addref r=%p count=%d",
 535                  r, r->refcount);
 536     }
 537 }
 538
 539 ZOOM_resultset ZOOM_resultset_create ()
 540 {
 541     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 542
 543     if (!log_level_initialized)
 544     {
 545         log_level=yaz_log_module_level("zoom");
 546         log_level_initialized=1;
 547     }
 548
 549     yaz_log (log_level, "ZOOM_resultset_create r = %p", r);
 550     r->refcount = 1;
 551     r->size = 0;
 552     r->odr = odr_createmem (ODR_ENCODE);
 553     r->start = 0;
 554     r->piggyback = 1;
 555     r->setname = 0;
 556     r->schema = 0;
 557     r->count = 0;
 558     r->step = 0;
 559     r->record_cache = 0;
 560     r->r_sort_spec = 0;
 561     r->query = 0;
 562     r->connection = 0;
 563     r->next = 0;
 564     return r;
 565 }
 566
 567 ZOOM_API(ZOOM_resultset)
 568 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 569 {
 570     ZOOM_resultset r;
 571     ZOOM_query s = ZOOM_query_create();
 572
 573     ZOOM_query_prefix (s, q);
 574
 575     r = ZOOM_connection_search (c, s);
 576     ZOOM_query_destroy (s);
 577     return r;
 578 }
 579
 580 ZOOM_API(ZOOM_resultset)
 581 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 582 {
 583     ZOOM_resultset r = ZOOM_resultset_create ();
 584     ZOOM_task task;
 585     const char *cp;
 586
 587     r->r_sort_spec = q->sort_spec;
 588     r->query = q;
 589
 590     r->options = ZOOM_options_create_with_parent(c->options);
 591
 592     r->start = ZOOM_options_get_int(r->options, "start", 0);
 593     r->count = ZOOM_options_get_int(r->options, "count", 0);
 594     {
 595         /* If "presentChunk" is defined use that; otherwise "step" */
 596         const char *cp = ZOOM_options_get (r->options, "presentChunk");
 597         r->step = ZOOM_options_get_int(r->options,
 598                                        (cp != 0 ? "presentChunk": "step"), 0);
 599     }
 600     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 601     cp = ZOOM_options_get (r->options, "setname");
 602     if (cp)
 603         r->setname = xstrdup(cp);
 604     cp = ZOOM_options_get (r->options, "schema");
 605     if (cp)
 606         r->schema = xstrdup(cp);
 607
 608     r->connection = c;
 609
 610     r->next = c->resultsets;
 611     c->resultsets = r;
 612
 613     if (c->host_port && c->proto == PROTO_HTTP)
 614     {
 615         if (!c->cs)
 616         {
 617             yaz_log(log_level, "NO COMSTACK");
 618             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 619         }
 620         else
 621         {
 622             yaz_log(log_level, "PREPARE FOR RECONNECT");
 623             c->reconnect_ok = 1;
 624         }
 625     }
 626
 627     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 628     task->u.search.resultset = r;
 629     ZOOM_resultset_addref (r);
 630
 631     (q->refcount)++;
 632
 633     if (!c->async)
 634     {
 635         while (ZOOM_event (1, &c))
 636             ;
 637     }
 638     return r;
 639 }
 640
 641 ZOOM_API(void)
 642     ZOOM_resultset_sort(ZOOM_resultset r,
 643                         const char *sort_type, const char *sort_spec)
 644 {
 645     ZOOM_connection c = r->connection;
 646     ZOOM_task task;
 647
 648     if (!c)
 649         return;
 650
 651     if (c->host_port && c->proto == PROTO_HTTP)
 652     {
 653         if (!c->cs)
 654         {
 655             yaz_log(log_level, "NO COMSTACK");
 656             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 657         }
 658         else
 659         {
 660             yaz_log(log_level, "PREPARE FOR RECONNECT");
 661             c->reconnect_ok = 1;
 662         }
 663     }
 664
 665     ZOOM_resultset_cache_reset(r);
 666     task = ZOOM_connection_add_task (c, ZOOM_TASK_SORT);
 667     task->u.sort.resultset = r;
 668     task->u.sort.q = ZOOM_query_create();
 669     ZOOM_query_sortby(task->u.sort.q, sort_spec);
 670
 671     ZOOM_resultset_addref (r);
 672
 673     if (!c->async)
 674     {
 675         while (ZOOM_event (1, &c))
 676             ;
 677     }
 678 }
 679
 680 ZOOM_API(void)
 681     ZOOM_resultset_cache_reset(ZOOM_resultset r)
 682 {
 683     ZOOM_record_cache rc;
 684
 685     for (rc = r->record_cache; rc; rc = rc->next)
 686     {
 687         if (rc->rec.wrbuf_marc)
 688             wrbuf_free (rc->rec.wrbuf_marc, 1);
 689         if (rc->rec.wrbuf_iconv)
 690             wrbuf_free (rc->rec.wrbuf_iconv, 1);
 691         if (rc->rec.wrbuf_opac)
 692             wrbuf_free (rc->rec.wrbuf_opac, 1);
 693     }
 694     r->record_cache = 0;
 695 }
 696
 697 ZOOM_API(void)
 698 ZOOM_resultset_destroy(ZOOM_resultset r)
 699 {
 700     if (!r)
 701         return;
 702     (r->refcount)--;
 703     yaz_log (log_level, "ZOOM_resultset_destroy r = %p count=%d",
 704              r, r->refcount);
 705     if (r->refcount == 0)
 706     {
 707         ZOOM_resultset_cache_reset(r);
 708
 709         if (r->connection)
 710         {
 711             /* remove ourselves from the resultsets in connection */
 712             ZOOM_resultset *rp = &r->connection->resultsets;
 713             while (1)
 714             {
 715                 assert (*rp);   /* we must be in this list!! */
 716                 if (*rp == r)
 717                 {   /* OK, we're here - take us out of it */
 718                     *rp = (*rp)->next;
 719                     break;
 720                 }
 721                 rp = &(*rp)->next;
 722             }
 723         }
 724         ZOOM_query_destroy (r->query);
 725         ZOOM_options_destroy (r->options);
 726         odr_destroy (r->odr);
 727         xfree (r->setname);
 728         xfree (r->schema);
 729         xfree (r);
 730     }
 731 }
 732
 733 ZOOM_API(size_t)
 734 ZOOM_resultset_size (ZOOM_resultset r)
 735 {
 736     return r->size;
 737 }
 738
 739 static void do_close (ZOOM_connection c)
 740 {
 741     if (c->cs)
 742         cs_close(c->cs);
 743     c->cs = 0;
 744     c->mask = 0;
 745     c->state = STATE_IDLE;
 746 }
 747
 748 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 749                                      int force_sync, int start, int count)
 750 {
 751     ZOOM_task task;
 752     ZOOM_connection c;
 753     const char *cp;
 754
 755     if (!r)
 756         return;
 757     c = r->connection;
 758     if (!c)
 759         return;
 760
 761     if (c->host_port && c->proto == PROTO_HTTP)
 762     {
 763         if (!c->cs)
 764         {
 765             yaz_log(log_level, "NO COMSTACK");
 766             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 767         }
 768         else
 769         {
 770             yaz_log(log_level, "PREPARE FOR RECONNECT");
 771             c->reconnect_ok = 1;
 772         }
 773     }
 774     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 775     task->u.retrieve.resultset = r;
 776     task->u.retrieve.start = start;
 777     task->u.retrieve.count = count;
 778
 779     cp = ZOOM_options_get (r->options, "schema");
 780     if (cp)
 781     {
 782         if (!r->schema || strcmp(r->schema, cp))
 783         {
 784             xfree(r->schema);
 785             r->schema = xstrdup(cp);
 786         }
 787     }
 788
 789     ZOOM_resultset_addref (r);
 790
 791     if (!r->connection->async || force_sync)
 792         while (r->connection && ZOOM_event (1, &r->connection))
 793             ;
 794 }
 795
 796 ZOOM_API(void)
 797 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 798                         size_t start, size_t count)
 799 {
 800     int force_present = 0;
 801
 802     if (!r)
 803         return ;
 804     if (count && recs)
 805         force_present = 1;
 806     ZOOM_resultset_retrieve (r, force_present, start, count);
 807     if (force_present)
 808     {
 809         size_t i;
 810         for (i = 0; i< count; i++)
 811             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 812     }
 813 }
 814
 815 static void get_cert(ZOOM_connection c)
 816 {
 817     char *cert_buf;
 818     int cert_len;
 819
 820     if (cs_get_peer_certificate_x509(c->cs, &cert_buf, &cert_len))
 821     {
 822         ZOOM_connection_option_setl(c, "sslPeerCert",
 823                                     cert_buf, cert_len);
 824         xfree(cert_buf);
 825     }
 826 }
 827
 828 static zoom_ret do_connect (ZOOM_connection c)
 829 {
 830     void *add;
 831     const char *effective_host;
 832     if (!log_level_initialized)
 833     {
 834         log_level=yaz_log_module_level("zoom");
 835         log_level_initialized=1;
 836     }
 837
 838
 839     if (c->proxy)
 840         effective_host = c->proxy;
 841     else
 842         effective_host = c->host_port;
 843
 844     yaz_log (log_level, "do_connect host=%s", effective_host);
 845
 846     if (c->cs)
 847         cs_close(c->cs);
 848     c->cs = cs_create_host (effective_host, 0, &add);
 849
 850     if (c->cs && c->cs->protocol == PROTO_HTTP)
 851     {
 852 #if HAVE_XML2
 853         const char *path = 0;
 854
 855         c->proto = PROTO_HTTP;
 856         cs_get_host_args(c->host_port, &path);
 857         xfree(c->path);
 858         c->path = (char*) xmalloc(strlen(path)+2);
 859         c->path[0] = '/';
 860         strcpy (c->path+1, path);
 861 #else
 862         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 863         do_close(c);
 864         return zoom_complete;
 865 #endif
 866     }
 867     if (c->cs)
 868     {
 869         int ret = cs_connect (c->cs, add);
 870         if (ret == 0)
 871         {
 872             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 873             ZOOM_connection_put_event(c, event);
 874             get_cert(c);
 875             if (c->proto == PROTO_Z3950)
 876                 ZOOM_connection_send_init(c);
 877             else
 878             {
 879                 /* no init request for SRW .. */
 880                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 881                 ZOOM_connection_remove_task (c);
 882                 c->mask = 0;
 883                 ZOOM_connection_exec_task (c);
 884             }
 885             c->state = STATE_ESTABLISHED;
 886             return zoom_pending;
 887         }
 888         else if (ret > 0)
 889         {
 890             c->state = STATE_CONNECTING;
 891             c->mask = ZOOM_SELECT_EXCEPT;
 892             if (c->cs->io_pending & CS_WANT_WRITE)
 893                 c->mask += ZOOM_SELECT_WRITE;
 894             if (c->cs->io_pending & CS_WANT_READ)
 895                 c->mask += ZOOM_SELECT_READ;
 896             return zoom_pending;
 897         }
 898     }
 899     c->state = STATE_IDLE;
 900     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 901     return zoom_complete;
 902 }
 903
 904 int z3950_connection_socket(ZOOM_connection c)
 905 {
 906     if (c->cs)
 907         return cs_fileno(c->cs);
 908     return -1;
 909 }
 910
 911 int z3950_connection_mask(ZOOM_connection c)
 912 {
 913     if (c->cs)
 914         return c->mask;
 915     return 0;
 916 }
 917
 918 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 919 {
 920     int i;
 921     for (i = 0; i<200; i++)
 922     {
 923         size_t len;
 924         Z_OtherInformation **oi;
 925         char buf[80];
 926         const char *val;
 927         const char *cp;
 928         int oidval;
 929
 930         sprintf (buf, "otherInfo%d", i);
 931         val = ZOOM_options_get (c->options, buf);
 932         if (!val)
 933             break;
 934         cp = strchr (val, ':');
 935         if (!cp)
 936             continue;
 937         len = cp - val;
 938         if (len >= sizeof(buf))
 939             len = sizeof(buf)-1;
 940         memcpy (buf, val, len);
 941         buf[len] = '\0';
 942         oidval = oid_getvalbyname (buf);
 943         if (oidval == VAL_NONE)
 944             continue;
 945
 946         yaz_oi_APDU(a, &oi);
 947         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 948     }
 949 }
 950
 951 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 952 {
 953     assert (a);
 954     if (c->cookie_out)
 955     {
 956         Z_OtherInformation **oi;
 957         yaz_oi_APDU(a, &oi);
 958         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 959     }
 960     if (c->client_IP)
 961     {
 962         Z_OtherInformation **oi;
 963         yaz_oi_APDU(a, &oi);
 964         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 965     }
 966     otherInfo_attach (c, a, out);
 967     if (!z_APDU(out, &a, 0, 0))
 968     {
 969         FILE *outf = fopen("/tmp/apdu.txt", "a");
 970         if (a && outf)
 971         {
 972             ODR odr_pr = odr_createmem(ODR_PRINT);
 973             fprintf (outf, "a=%p\n", a);
 974             odr_setprint(odr_pr, outf);
 975             z_APDU(odr_pr, &a, 0, 0);
 976             odr_destroy(odr_pr);
 977         }
 978         yaz_log (log_level, "encoding failed");
 979         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 980         odr_reset(out);
 981         return -1;
 982     }
 983
 984     return 0;
 985 }
 986
 987 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 988 {
 989     ZOOM_Event event;
 990     assert (a);
 991     if (encode_APDU(c, a, c->odr_out))
 992         return zoom_complete;
 993     yaz_log(log_level, "send APDU type=%d", a->which);
 994     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 995     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 996     ZOOM_connection_put_event (c, event);
 997     odr_reset(c->odr_out);
 998     return do_write (c);
 999 }
1000
1001 /* returns 1 if PDU was sent OK (still pending )
1002            0 if PDU was not sent OK (nothing to wait for)
1003 */
1004
1005 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
1006 {
1007     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
1008     Z_InitRequest *ireq = apdu->u.initRequest;
1009     Z_IdAuthentication *auth = (Z_IdAuthentication *)
1010         odr_malloc(c->odr_out, sizeof(*auth));
1011     const char *auth_groupId = ZOOM_options_get (c->options, "group");
1012     const char *auth_userId = ZOOM_options_get (c->options, "user");
1013     const char *auth_password = ZOOM_options_get (c->options, "password");
1014     char *version;
1015
1016     /* support the pass for backwards compatibility */
1017     if (!auth_password)
1018         auth_password = ZOOM_options_get (c->options, "pass");
1019
1020     ODR_MASK_SET(ireq->options, Z_Options_search);
1021     ODR_MASK_SET(ireq->options, Z_Options_present);
1022     ODR_MASK_SET(ireq->options, Z_Options_scan);
1023     ODR_MASK_SET(ireq->options, Z_Options_sort);
1024     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
1025     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
1026
1027     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
1028     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
1029     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
1030
1031     /* Index Data's Z39.50 Implementor Id is 81 */
1032     ireq->implementationId = odr_prepend(c->odr_out,
1033         ZOOM_options_get(c->options, "implementationId"),
1034         odr_prepend(c->odr_out, "81", ireq->implementationId));
1035
1036     ireq->implementationName = odr_prepend(c->odr_out,
1037         ZOOM_options_get(c->options, "implementationName"),
1038         odr_prepend(c->odr_out, "ZOOM-C", ireq->implementationName));
1039
1040     version = odr_strdup(c->odr_out, "$Revision: 1.34 $");
1041     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
1042         version[strlen(version)-2] = '\0';
1043     ireq->implementationVersion = odr_prepend(c->odr_out,
1044         ZOOM_options_get(c->options, "implementationVersion"),
1045         odr_prepend(c->odr_out, &version[11], ireq->implementationVersion));
1046
1047     *ireq->maximumRecordSize =
1048         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
1049     *ireq->preferredMessageSize =
1050         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
1051
1052     if (auth_groupId || auth_password)
1053     {
1054         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
1055         int i = 0;
1056         pass->groupId = 0;
1057         if (auth_groupId && *auth_groupId)
1058         {
1059             pass->groupId = (char *)
1060                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
1061             strcpy(pass->groupId, auth_groupId);
1062             i++;
1063         }
1064         pass->userId = 0;
1065         if (auth_userId && *auth_userId)
1066         {
1067             pass->userId = (char *)
1068                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
1069             strcpy(pass->userId, auth_userId);
1070             i++;
1071         }
1072         pass->password = 0;
1073         if (auth_password && *auth_password)
1074         {
1075             pass->password = (char *)
1076                 odr_malloc(c->odr_out, strlen(auth_password)+1);
1077             strcpy(pass->password, auth_password);
1078             i++;
1079         }
1080         if (i)
1081         {
1082             auth->which = Z_IdAuthentication_idPass;
1083             auth->u.idPass = pass;
1084             ireq->idAuthentication = auth;
1085         }
1086     }
1087     else if (auth_userId)
1088     {
1089         auth->which = Z_IdAuthentication_open;
1090         auth->u.open = (char *)
1091             odr_malloc(c->odr_out, strlen(auth_userId)+1);
1092         strcpy(auth->u.open, auth_userId);
1093         ireq->idAuthentication = auth;
1094     }
1095     if (c->proxy)
1096         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
1097                                  VAL_PROXY, 1, c->host_port);
1098     if (c->charset||c->lang)
1099     {
1100         Z_OtherInformation **oi;
1101         Z_OtherInformationUnit *oi_unit;
1102
1103         yaz_oi_APDU(apdu, &oi);
1104
1105         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
1106         {
1107             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
1108
1109             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
1110             oi_unit->information.externallyDefinedInfo =
1111                 yaz_set_proposal_charneg
1112                 (c->odr_out,
1113                  (const char **)&c->charset, (c->charset) ? 1:0,
1114                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
1115         }
1116     }
1117     assert (apdu);
1118     return send_APDU (c, apdu);
1119 }
1120
1121 #if HAVE_XML2
1122 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
1123 {
1124     char ctype[50];
1125     Z_SOAP_Handler h[2] = {
1126         {"http://www.loc.gov/zing/srw/", 0, (Z_SOAP_fun) yaz_srw_codec},
1127         {0, 0, 0}
1128     };
1129     ODR o = odr_createmem(ODR_ENCODE);
1130     int ret;
1131     Z_SOAP *p = (Z_SOAP*) odr_malloc(o, sizeof(*p));
1132     Z_GDU *gdu;
1133     ZOOM_Event event;
1134
1135     gdu = z_get_HTTP_Request(c->odr_out);
1136     gdu->u.HTTP_Request->path = c->path;
1137
1138     if (c->host_port)
1139     {
1140         const char *cp0 = strstr(c->host_port, "://");
1141         const char *cp1 = 0;
1142         if (cp0)
1143             cp0 = cp0+3;
1144         else
1145             cp0 = c->host_port;
1146
1147         cp1 = strchr(cp0, '/');
1148         if (!cp1)
1149             cp1 = cp0+strlen(cp0);
1150
1151         if (cp0 && cp1)
1152         {
1153             char *h = (char*) odr_malloc(c->odr_out, cp1 - cp0 + 1);
1154             memcpy (h, cp0, cp1 - cp0);
1155             h[cp1-cp0] = '\0';
1156             z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1157                               "Host", h);
1158         }
1159     }
1160
1161     strcpy(ctype, "text/xml");
1162     if (c->charset && strlen(c->charset) < 20)
1163     {
1164         strcat(ctype, "; charset=");
1165         strcat(ctype, c->charset);
1166     }
1167     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1168                       "Content-Type", ctype);
1169     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1170                       "SOAPAction", "\"\"");
1171     p->which = Z_SOAP_generic;
1172     p->u.generic = (Z_SOAP_Generic *) odr_malloc(o, sizeof(*p->u.generic));
1173     p->u.generic->no = 0;
1174     p->u.generic->ns = 0;
1175     p->u.generic->p = sr;
1176     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1177
1178     ret = z_soap_codec_enc(o, &p,
1179                            &gdu->u.HTTP_Request->content_buf,
1180                            &gdu->u.HTTP_Request->content_len, h,
1181                            c->charset);
1182
1183     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1184         return zoom_complete;
1185     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1186
1187     odr_destroy(o);
1188
1189     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1190     ZOOM_connection_put_event (c, event);
1191     odr_reset(c->odr_out);
1192     return do_write (c);
1193 }
1194 #endif
1195
1196 #if HAVE_XML2
1197 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1198 {
1199     int i;
1200     ZOOM_resultset resultset = 0;
1201     Z_SRW_PDU *sr = 0;
1202     const char *recordPacking = 0;
1203
1204     if (c->error)                  /* don't continue on error */
1205         return zoom_complete;
1206     assert (c->tasks);
1207     if (c->tasks->which == ZOOM_TASK_SEARCH)
1208     {
1209         resultset = c->tasks->u.search.resultset;
1210         resultset->setname = xstrdup ("default");
1211         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1212     }
1213     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1214     {
1215         resultset = c->tasks->u.retrieve.resultset;
1216
1217         resultset->start = c->tasks->u.retrieve.start;
1218         resultset->count = c->tasks->u.retrieve.count;
1219
1220         if (resultset->start >= resultset->size)
1221             return zoom_complete;
1222         if (resultset->start + resultset->count > resultset->size)
1223             resultset->count = resultset->size - resultset->start;
1224
1225         for (i = 0; i<resultset->count; i++)
1226         {
1227             ZOOM_record rec =
1228                 record_cache_lookup (resultset, i + resultset->start);
1229             if (!rec)
1230                 break;
1231         }
1232         if (i == resultset->count)
1233             return zoom_complete;
1234     }
1235     assert(resultset->query);
1236
1237     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1238
1239     if (resultset->query->z_query->which == Z_Query_type_104
1240         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1241     {
1242
1243         sr->u.request->query_type = Z_SRW_query_type_cql;
1244         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1245     }
1246     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1247              resultset->query->z_query->u.type_1)
1248     {
1249         sr->u.request->query_type = Z_SRW_query_type_pqf;
1250         sr->u.request->query.pqf = resultset->query->query_string;
1251     }
1252     else
1253     {
1254         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1255         return zoom_complete;
1256     }
1257     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1258     sr->u.request->maximumRecords = odr_intdup (
1259         c->odr_out, resultset->step>0 ? resultset->step : resultset->count);
1260     sr->u.request->recordSchema = resultset->schema;
1261
1262     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1263
1264     if (recordPacking)
1265         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1266
1267     return send_srw(c, sr);
1268 }
1269 #else
1270 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1271 {
1272     return zoom_complete;
1273 }
1274 #endif
1275
1276 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1277 {
1278     ZOOM_resultset r;
1279     int lslb, ssub, mspn;
1280     const char *syntax;
1281     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1282     Z_SearchRequest *search_req = apdu->u.searchRequest;
1283     const char *elementSetName;
1284     const char *smallSetElementSetName;
1285     const char *mediumSetElementSetName;
1286
1287     assert (c->tasks);
1288     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1289
1290     r = c->tasks->u.search.resultset;
1291
1292     elementSetName =
1293         ZOOM_options_get (r->options, "elementSetName");
1294     smallSetElementSetName  =
1295         ZOOM_options_get (r->options, "smallSetElementSetName");
1296     mediumSetElementSetName =
1297         ZOOM_options_get (r->options, "mediumSetElementSetName");
1298
1299     if (!smallSetElementSetName)
1300         smallSetElementSetName = elementSetName;
1301
1302     if (!mediumSetElementSetName)
1303         mediumSetElementSetName = elementSetName;
1304
1305     assert (r);
1306     assert (r->query);
1307
1308     /* prepare query for the search request */
1309     search_req->query = r->query->z_query;
1310     if (!search_req->query)
1311     {
1312         set_ZOOM_error(c, ZOOM_ERROR_INVALID_QUERY, 0);
1313         return zoom_complete;
1314     }
1315
1316     search_req->databaseNames =
1317         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1318
1319     /* get syntax (no need to provide unless piggyback is in effect) */
1320     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1321
1322     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1323     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1324     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1325     if (lslb != -1 && ssub != -1 && mspn != -1)
1326     {
1327         /* So're a Z39.50 expert? Let's hope you don't do sort */
1328         *search_req->largeSetLowerBound = lslb;
1329         *search_req->smallSetUpperBound = ssub;
1330         *search_req->mediumSetPresentNumber = mspn;
1331     }
1332     else if (r->start == 0 && r->count > 0
1333              && r->piggyback && !r->r_sort_spec && !r->schema)
1334     {
1335         /* Regular piggyback - do it unless we're going to do sort */
1336         *search_req->largeSetLowerBound = 2000000000;
1337         *search_req->smallSetUpperBound = 1;
1338         *search_req->mediumSetPresentNumber = r->step>0 ? r->step : r->count;
1339     }
1340     else
1341     {
1342         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1343         smallSetElementSetName = 0;
1344         mediumSetElementSetName = 0;
1345         syntax = 0;
1346     }
1347     if (smallSetElementSetName && *smallSetElementSetName)
1348     {
1349         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1350             odr_malloc (c->odr_out, sizeof(*esn));
1351
1352         esn->which = Z_ElementSetNames_generic;
1353         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1354         search_req->smallSetElementSetNames = esn;
1355     }
1356     if (mediumSetElementSetName && *mediumSetElementSetName)
1357     {
1358         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1359             odr_malloc (c->odr_out, sizeof(*esn));
1360
1361         esn->which = Z_ElementSetNames_generic;
1362         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1363         search_req->mediumSetElementSetNames = esn;
1364     }
1365     if (syntax)
1366         search_req->preferredRecordSyntax =
1367             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1368
1369     if (!r->setname)
1370     {
1371         if (c->support_named_resultsets)
1372         {
1373             char setname[14];
1374             int ord;
1375             /* find the lowest unused ordinal so that we re-use
1376                result sets on the server. */
1377             for (ord = 1; ; ord++)
1378             {
1379                 ZOOM_resultset rp;
1380                 sprintf (setname, "%d", ord);
1381                 for (rp = c->resultsets; rp; rp = rp->next)
1382                     if (rp->setname && !strcmp (rp->setname, setname))
1383                         break;
1384                 if (!rp)
1385                     break;
1386             }
1387             r->setname = xstrdup (setname);
1388             yaz_log (log_level, "allocating set %s", r->setname);
1389         }
1390         else
1391             r->setname = xstrdup ("default");
1392         ZOOM_options_set (r->options, "setname", r->setname);
1393     }
1394     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1395     /* send search request */
1396     return send_APDU (c, apdu);
1397 }
1398
1399 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1400 {
1401     int oclass;
1402     Z_DefaultDiagFormat *r;
1403     char *addinfo = 0;
1404
1405     xfree (c->addinfo);
1406     c->addinfo = 0;
1407     if (p->which != Z_DiagRec_defaultFormat)
1408     {
1409         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1410         return;
1411     }
1412     r = p->u.defaultFormat;
1413     switch (r->which)
1414     {
1415     case Z_DefaultDiagFormat_v2Addinfo:
1416         addinfo = r->u.v2Addinfo;
1417         break;
1418     case Z_DefaultDiagFormat_v3Addinfo:
1419         addinfo = r->u.v3Addinfo;
1420         break;
1421     }
1422     set_dset_error(c, *r->condition,
1423                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1424                    addinfo, 0);
1425 }
1426
1427 ZOOM_API(ZOOM_record)
1428 ZOOM_record_clone (ZOOM_record srec)
1429 {
1430     char *buf;
1431     int size;
1432     ODR odr_enc;
1433     ZOOM_record nrec;
1434
1435     odr_enc = odr_createmem(ODR_ENCODE);
1436     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1437         return 0;
1438     buf = odr_getbuf (odr_enc, &size, 0);
1439
1440     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1441     nrec->odr = odr_createmem(ODR_DECODE);
1442     nrec->wrbuf_marc = 0;
1443     nrec->wrbuf_iconv = 0;
1444     nrec->wrbuf_opac = 0;
1445     odr_setbuf (nrec->odr, buf, size, 0);
1446     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1447
1448     odr_destroy (odr_enc);
1449     return nrec;
1450 }
1451
1452 ZOOM_API(ZOOM_record)
1453 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1454 {
1455     return record_cache_lookup (s, pos);
1456 }
1457
1458 ZOOM_API(ZOOM_record)
1459 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1460 {
1461     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1462
1463     if (!rec)
1464     {
1465         ZOOM_resultset_retrieve (r, 1, pos, 1);
1466         rec = ZOOM_resultset_record_immediate (r, pos);
1467     }
1468     return rec;
1469 }
1470
1471 ZOOM_API(void)
1472 ZOOM_record_destroy (ZOOM_record rec)
1473 {
1474     if (!rec)
1475         return;
1476     if (rec->wrbuf_marc)
1477         wrbuf_free (rec->wrbuf_marc, 1);
1478     if (rec->wrbuf_iconv)
1479         wrbuf_free (rec->wrbuf_iconv, 1);
1480     if (rec->wrbuf_opac)
1481         wrbuf_free (rec->wrbuf_opac, 1);
1482     odr_destroy (rec->odr);
1483     xfree (rec);
1484 }
1485
1486 static const char *marc_iconv_return(ZOOM_record rec, int marc_type,
1487                                      int *len,
1488                                      const char *buf, int sz,
1489                                      const char *record_charset)
1490 {
1491     char to[40];
1492     char from[40];
1493     yaz_iconv_t cd = 0;
1494     yaz_marc_t mt = yaz_marc_create();
1495
1496     *from = '\0';
1497     strcpy(to, "UTF-8");
1498     if (record_charset && *record_charset)
1499     {
1500         /* Use "from,to" or just "from" */
1501         const char *cp =strchr(record_charset, ',');
1502         int clen = strlen(record_charset);
1503         if (cp && cp[1])
1504         {
1505             strncpy( to, cp+1, sizeof(to)-1);
1506             to[sizeof(to)-1] = '\0';
1507             clen = cp - record_charset;
1508         }
1509         if (clen > sizeof(from)-1)
1510             clen = sizeof(from)-1;
1511
1512         if (clen)
1513             strncpy(from, record_charset, clen);
1514         from[clen] = '\0';
1515     }
1516
1517     if (*from && *to)
1518     {
1519         cd = yaz_iconv_open(to, from);
1520         yaz_marc_iconv(mt, cd);
1521     }
1522
1523     yaz_marc_xml(mt, marc_type);
1524     if (!rec->wrbuf_marc)
1525         rec->wrbuf_marc = wrbuf_alloc();
1526     wrbuf_rewind (rec->wrbuf_marc);
1527     if (yaz_marc_decode_wrbuf (mt, buf, sz, rec->wrbuf_marc) > 0)
1528     {
1529         yaz_marc_destroy(mt);
1530         if (cd)
1531             yaz_iconv_close(cd);
1532         if (len)
1533             *len = wrbuf_len(rec->wrbuf_marc);
1534         return wrbuf_buf(rec->wrbuf_marc);
1535     }
1536     yaz_marc_destroy(mt);
1537     if (cd)
1538         yaz_iconv_close(cd);
1539     return 0;
1540 }
1541
1542 static const char *record_iconv_return(ZOOM_record rec, int *len,
1543                                        const char *buf, int sz,
1544                                        const char *record_charset)
1545 {
1546     char to[40];
1547     char from[40];
1548     yaz_iconv_t cd = 0;
1549
1550     *from = '\0';
1551     strcpy(to, "UTF-8");
1552     if (record_charset && *record_charset)
1553     {
1554         /* Use "from,to" or just "from" */
1555         const char *cp =strchr(record_charset, ',');
1556         int clen = strlen(record_charset);
1557         if (cp && cp[1])
1558         {
1559             strncpy( to, cp+1, sizeof(to)-1);
1560             to[sizeof(to)-1] = '\0';
1561             clen = cp - record_charset;
1562         }
1563         if (clen > sizeof(from)-1)
1564             clen = sizeof(from)-1;
1565
1566         if (clen)
1567             strncpy(from, record_charset, clen);
1568         from[clen] = '\0';
1569     }
1570
1571     if (*from && *to && (cd = yaz_iconv_open(to, from)))
1572     {
1573         char outbuf[12];
1574         size_t inbytesleft = sz;
1575         const char *inp = buf;
1576
1577         if (!rec->wrbuf_iconv)
1578             rec->wrbuf_iconv = wrbuf_alloc();
1579
1580         wrbuf_rewind(rec->wrbuf_iconv);
1581
1582         while (inbytesleft)
1583         {
1584             size_t outbytesleft = sizeof(outbuf);
1585             char *outp = outbuf;
1586             size_t r = yaz_iconv (cd, (char**) &inp,
1587                                   &inbytesleft,
1588                                   &outp, &outbytesleft);
1589             if (r == (size_t) (-1))
1590             {
1591                 int e = yaz_iconv_error(cd);
1592                 if (e != YAZ_ICONV_E2BIG)
1593                     break;
1594             }
1595             wrbuf_write(rec->wrbuf_iconv, outbuf, outp - outbuf);
1596         }
1597         wrbuf_puts(rec->wrbuf_iconv, "");
1598         buf = wrbuf_buf(rec->wrbuf_iconv);
1599         sz = wrbuf_len(rec->wrbuf_iconv);
1600         yaz_iconv_close(cd);
1601     }
1602     if (len)
1603         *len = sz;
1604     return buf;
1605 }
1606
1607 ZOOM_API(const char *)
1608 ZOOM_record_get (ZOOM_record rec, const char *type_spec, int *len)
1609 {
1610     char type[40];
1611     char charset[40];
1612     char xpath[512];
1613     const char *cp;
1614     int i;
1615     Z_NamePlusRecord *npr;
1616
1617     if (len)
1618         *len = 0; /* default return */
1619
1620     if (!rec)
1621         return 0;
1622     npr = rec->npr;
1623     if (!npr)
1624         return 0;
1625
1626     cp = type_spec;
1627     for (i = 0; cp[i] && i < sizeof(type)-1; i++)
1628     {
1629         if (cp[i] == ';' || cp[i] == ' ')
1630             break;
1631         type[i] = cp[i];
1632     }
1633     type[i] = '\0';
1634     charset[0] = '\0';
1635     while (type_spec[i] == ';')
1636     {
1637         i++;
1638         while (type_spec[i] == ' ')
1639             i++;
1640         if (!strncmp(type_spec+i, "charset=", 8))
1641         {
1642             int j = 0;
1643             i = i + 8; /* skip charset= */
1644             for (j = 0; type_spec[i]  && j < sizeof(charset)-1; i++, j++)
1645             {
1646                 if (type_spec[i] == ';' || type_spec[i] == ' ')
1647                     break;
1648                 charset[j] = cp[i];
1649             }
1650             charset[j] = '\0';
1651         }
1652         else if (!strncmp(type_spec+i, "xpath=", 6))
1653         {
1654             int j = 0;
1655             i = i + 6;
1656             for (j = 0; type_spec[i] && j < sizeof(xpath)-1; i++, j++)
1657                 xpath[j] = cp[i];
1658             xpath[j] = '\0';
1659         }
1660         while (type_spec[i] == ' ')
1661             i++;
1662     }
1663     if (!strcmp (type, "database"))
1664     {
1665         if (len)
1666             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1667         return npr->databaseName;
1668     }
1669     else if (!strcmp (type, "syntax"))
1670     {
1671         const char *desc = 0;
1672         if (npr->which == Z_NamePlusRecord_databaseRecord)
1673         {
1674             Z_External *r = (Z_External *) npr->u.databaseRecord;
1675             oident *ent = oid_getentbyoid(r->direct_reference);
1676             if (ent)
1677                 desc = ent->desc;
1678         }
1679         if (!desc)
1680             desc = "none";
1681         if (len)
1682             *len = strlen(desc);
1683         return desc;
1684     }
1685     if (npr->which != Z_NamePlusRecord_databaseRecord)
1686         return 0;
1687
1688     /* from now on - we have a database record .. */
1689     if (!strcmp (type, "render"))
1690     {
1691         Z_External *r = (Z_External *) npr->u.databaseRecord;
1692         oident *ent = oid_getentbyoid(r->direct_reference);
1693
1694         /* render bibliographic record .. */
1695         if (r->which == Z_External_OPAC)
1696         {
1697             r = r->u.opac->bibliographicRecord;
1698             if (!r)
1699                 return 0;
1700             ent = oid_getentbyoid(r->direct_reference);
1701         }
1702         if (r->which == Z_External_sutrs)
1703             return record_iconv_return(rec, len,
1704                                        (char*) r->u.sutrs->buf,
1705                                        r->u.sutrs->len,
1706                                        charset);
1707         else if (r->which == Z_External_octet)
1708         {
1709             const char *ret_buf;
1710             switch (ent->value)
1711             {
1712             case VAL_SOIF:
1713             case VAL_HTML:
1714             case VAL_SUTRS:
1715                 break;
1716             case VAL_TEXT_XML:
1717             case VAL_APPLICATION_XML:
1718                 break;
1719             default:
1720                 ret_buf = marc_iconv_return(
1721                     rec, YAZ_MARC_LINE, len,
1722                     (const char *) r->u.octet_aligned->buf,
1723                     r->u.octet_aligned->len,
1724                     charset);
1725                 if (ret_buf)
1726                     return ret_buf;
1727             }
1728             return record_iconv_return(rec, len,
1729                                        (const char *) r->u.octet_aligned->buf,
1730                                        r->u.octet_aligned->len,
1731                                        charset);
1732         }
1733         else if (r->which == Z_External_grs1)
1734         {
1735             if (!rec->wrbuf_marc)
1736                 rec->wrbuf_marc = wrbuf_alloc();
1737             wrbuf_rewind (rec->wrbuf_marc);
1738             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1739             return record_iconv_return(rec, len,
1740                                        wrbuf_buf(rec->wrbuf_marc),
1741                                        wrbuf_len(rec->wrbuf_marc),
1742                                        charset);
1743         }
1744         return 0;
1745     }
1746     else if (!strcmp (type, "xml") || !strcmp(type, "oai"))
1747     {
1748         Z_External *r = (Z_External *) npr->u.databaseRecord;
1749         oident *ent = oid_getentbyoid(r->direct_reference);
1750
1751         /* render bibliographic record .. */
1752         if (r->which == Z_External_OPAC)
1753         {
1754             r = r->u.opac->bibliographicRecord;
1755             if (!r)
1756                 return 0;
1757             ent = oid_getentbyoid(r->direct_reference);
1758         }
1759
1760         if (r->which == Z_External_sutrs)
1761             return record_iconv_return(rec, len,
1762                                        (const char *) r->u.sutrs->buf,
1763                                        r->u.sutrs->len,
1764                                        charset);
1765         else if (r->which == Z_External_octet)
1766         {
1767             const char *ret_buf;
1768             int marc_decode_type = YAZ_MARC_MARCXML;
1769
1770             if (!strcmp(type, "oai"))
1771                 marc_decode_type = YAZ_MARC_OAIMARC;
1772             switch (ent->value)
1773             {
1774             case VAL_SOIF:
1775             case VAL_HTML:
1776             case VAL_SUTRS:
1777                 break;
1778             case VAL_TEXT_XML:
1779             case VAL_APPLICATION_XML:
1780                 break;
1781             default:
1782                 ret_buf = marc_iconv_return(
1783                     rec, marc_decode_type, len,
1784                     (const char *) r->u.octet_aligned->buf,
1785                     r->u.octet_aligned->len,
1786                     charset);
1787                 if (ret_buf)
1788                     return ret_buf;
1789             }
1790             return record_iconv_return(rec, len,
1791                                        (const char *) r->u.octet_aligned->buf,
1792                                        r->u.octet_aligned->len,
1793                                        charset);
1794         }
1795         else if (r->which == Z_External_grs1)
1796         {
1797             if (len) *len = 5;
1798             return "GRS-1";
1799         }
1800         return 0;
1801     }
1802     else if (!strcmp (type, "raw"))
1803     {
1804         Z_External *r = (Z_External *) npr->u.databaseRecord;
1805
1806         if (r->which == Z_External_sutrs)
1807         {
1808             if (len) *len = r->u.sutrs->len;
1809             return (const char *) r->u.sutrs->buf;
1810         }
1811         else if (r->which == Z_External_octet)
1812         {
1813             if (len) *len = r->u.octet_aligned->len;
1814             return (const char *) r->u.octet_aligned->buf;
1815         }
1816         else /* grs-1, explain, OPAC, ... */
1817         {
1818             if (len) *len = -1;
1819             return (const char *) npr->u.databaseRecord;
1820         }
1821         return 0;
1822     }
1823     else if (!strcmp (type, "ext"))
1824     {
1825         if (len) *len = -1;
1826         return (const char *) npr->u.databaseRecord;
1827     }
1828     else if (!strcmp (type, "opac"))
1829
1830     {
1831         Z_External *r = (Z_External *) npr->u.databaseRecord;
1832         if (r->which == Z_External_OPAC)
1833         {
1834             if (!rec->wrbuf_opac)
1835                 rec->wrbuf_opac = wrbuf_alloc();
1836             wrbuf_rewind (rec->wrbuf_opac);
1837             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
1838             return record_iconv_return(rec, len,
1839                                        wrbuf_buf(rec->wrbuf_opac),
1840                                        wrbuf_len(rec->wrbuf_opac),
1841                                        charset);
1842         }
1843     }
1844     return 0;
1845 }
1846
1847 static int strcmp_null(const char *v1, const char *v2)
1848 {
1849     if (!v1 && !v2)
1850         return 0;
1851     if (!v1 || !v2)
1852         return -1;
1853     return strcmp(v1, v2);
1854 }
1855
1856 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1857                               int pos)
1858 {
1859     ZOOM_record_cache rc;
1860     const char *elementSetName =
1861         ZOOM_resultset_option_get (r, "elementSetName");
1862     const char *syntax =
1863         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1864
1865     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1866     ZOOM_connection_put_event(r->connection, event);
1867
1868     for (rc = r->record_cache; rc; rc = rc->next)
1869     {
1870         if (pos == rc->pos)
1871         {
1872             if (strcmp_null(r->schema, rc->schema))
1873                 continue;
1874             if (strcmp_null(elementSetName,rc->elementSetName))
1875                 continue;
1876             if (strcmp_null(syntax, rc->syntax))
1877                 continue;
1878             /* not destroying rc->npr (it's handled by nmem )*/
1879             rc->rec.npr = npr;
1880             /* keeping wrbuf_marc too */
1881             return;
1882         }
1883     }
1884     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1885     rc->rec.npr = npr;
1886     rc->rec.odr = 0;
1887     rc->rec.wrbuf_marc = 0;
1888     rc->rec.wrbuf_iconv = 0;
1889     rc->rec.wrbuf_opac = 0;
1890     if (elementSetName)
1891         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1892     else
1893         rc->elementSetName = 0;
1894
1895     if (syntax)
1896         rc->syntax = odr_strdup (r->odr, syntax);
1897     else
1898         rc->syntax = 0;
1899
1900     if (r->schema)
1901         rc->schema = odr_strdup (r->odr, r->schema);
1902     else
1903         rc->schema = 0;
1904
1905     rc->pos = pos;
1906     rc->next = r->record_cache;
1907     r->record_cache = rc;
1908 }
1909
1910 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1911 {
1912     ZOOM_record_cache rc;
1913     const char *elementSetName =
1914         ZOOM_resultset_option_get (r, "elementSetName");
1915     const char *syntax =
1916         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1917
1918     for (rc = r->record_cache; rc; rc = rc->next)
1919     {
1920         if (pos == rc->pos)
1921         {
1922             if (strcmp_null(r->schema, rc->schema))
1923                 continue;
1924             if (strcmp_null(elementSetName,rc->elementSetName))
1925                 continue;
1926             if (strcmp_null(syntax, rc->syntax))
1927                 continue;
1928             return &rc->rec;
1929         }
1930     }
1931     return 0;
1932 }
1933
1934 static void handle_records (ZOOM_connection c, Z_Records *sr,
1935                             int present_phase)
1936 {
1937     ZOOM_resultset resultset;
1938
1939     if (!c->tasks)
1940         return ;
1941     switch (c->tasks->which)
1942     {
1943     case ZOOM_TASK_SEARCH:
1944         resultset = c->tasks->u.search.resultset;
1945         break;
1946     case ZOOM_TASK_RETRIEVE:
1947         resultset = c->tasks->u.retrieve.resultset;
1948         break;
1949     default:
1950         return;
1951     }
1952     if (sr && sr->which == Z_Records_NSD)
1953     {
1954         Z_DiagRec dr, *dr_p = &dr;
1955         dr.which = Z_DiagRec_defaultFormat;
1956         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1957
1958         response_diag (c, dr_p);
1959     }
1960     else if (sr && sr->which == Z_Records_multipleNSD)
1961     {
1962         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1963             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1964         else
1965             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1966     }
1967     else
1968     {
1969         if (resultset->count + resultset->start > resultset->size)
1970             resultset->count = resultset->size - resultset->start;
1971         if (resultset->count < 0)
1972             resultset->count = 0;
1973         if (sr && sr->which == Z_Records_DBOSD)
1974         {
1975             int i;
1976             NMEM nmem = odr_extract_mem (c->odr_in);
1977             Z_NamePlusRecordList *p =
1978                 sr->u.databaseOrSurDiagnostics;
1979             for (i = 0; i<p->num_records; i++)
1980             {
1981                 record_cache_add (resultset, p->records[i],
1982                                   i+ resultset->start);
1983             }
1984             /* transfer our response to search_nmem .. we need it later */
1985             nmem_transfer (resultset->odr->mem, nmem);
1986             nmem_destroy (nmem);
1987             if (present_phase && p->num_records == 0)
1988             {
1989                 /* present response and we didn't get any records! */
1990                 Z_NamePlusRecord *myrec =
1991                     zget_surrogateDiagRec(resultset->odr, 0, 14, 0);
1992                 record_cache_add(resultset, myrec, resultset->start);
1993                 yaz_log(YLOG_LOG, "pseudo record 1, at pos %d",
1994                         resultset->start);
1995             }
1996         }
1997         else if (present_phase)
1998         {
1999             /* present response and we didn't get any records! */
2000             Z_NamePlusRecord *myrec =
2001                 zget_surrogateDiagRec(resultset->odr, 0, 14, 0);
2002             record_cache_add(resultset, myrec, resultset->start);
2003             yaz_log(YLOG_LOG, "pseudo record 1, at pos %d",
2004                     resultset->start);
2005         }
2006     }
2007 }
2008
2009 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
2010 {
2011     handle_records (c, pr->records, 1);
2012 }
2013
2014 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
2015 {
2016     ZOOM_resultset resultset;
2017     ZOOM_Event event;
2018
2019     yaz_log (log_level, "got search response");
2020
2021     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
2022         return ;
2023
2024     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2025     ZOOM_connection_put_event(c, event);
2026
2027     resultset = c->tasks->u.search.resultset;
2028
2029     resultset->size = *sr->resultCount;
2030     handle_records (c, sr->records, 0);
2031 }
2032
2033 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
2034 {
2035     if (res->diagnostics && res->num_diagnostics > 0)
2036         response_diag (c, res->diagnostics[0]);
2037 }
2038
2039 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
2040 {
2041     NMEM nmem = odr_extract_mem (c->odr_in);
2042     ZOOM_scanset scan;
2043
2044     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
2045         return 0;
2046     scan = c->tasks->u.scan.scan;
2047
2048     if (res->entries && res->entries->nonsurrogateDiagnostics)
2049         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
2050     scan->scan_response = res;
2051     nmem_transfer (scan->odr->mem, nmem);
2052     if (res->stepSize)
2053         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
2054     if (res->positionOfTerm)
2055         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
2056     if (res->scanStatus)
2057         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
2058     if (res->numberOfEntriesReturned)
2059         ZOOM_options_set_int (scan->options, "number",
2060                               *res->numberOfEntriesReturned);
2061     nmem_destroy (nmem);
2062     return 1;
2063 }
2064
2065 static zoom_ret send_sort (ZOOM_connection c,
2066                            ZOOM_resultset resultset)
2067 {
2068     if (c->error)
2069         resultset->r_sort_spec = 0;
2070     if (resultset->r_sort_spec)
2071     {
2072         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
2073         Z_SortRequest *req = apdu->u.sortRequest;
2074
2075         req->num_inputResultSetNames = 1;
2076         req->inputResultSetNames = (Z_InternationalString **)
2077             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
2078         req->inputResultSetNames[0] =
2079             odr_strdup (c->odr_out, resultset->setname);
2080         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
2081         req->sortSequence = resultset->r_sort_spec;
2082         resultset->r_sort_spec = 0;
2083         return send_APDU (c, apdu);
2084     }
2085     return zoom_complete;
2086 }
2087
2088 static zoom_ret send_present (ZOOM_connection c)
2089 {
2090     Z_APDU *apdu = 0;
2091     Z_PresentRequest *req = 0;
2092     int i = 0;
2093     const char *syntax = 0;
2094     const char *elementSetName = 0;
2095     ZOOM_resultset  resultset;
2096
2097     if (!c->tasks)
2098         return zoom_complete;
2099
2100     switch (c->tasks->which)
2101     {
2102     case ZOOM_TASK_SEARCH:
2103         resultset = c->tasks->u.search.resultset;
2104         break;
2105     case ZOOM_TASK_RETRIEVE:
2106         resultset = c->tasks->u.retrieve.resultset;
2107         resultset->start = c->tasks->u.retrieve.start;
2108         resultset->count = c->tasks->u.retrieve.count;
2109
2110         if (resultset->start >= resultset->size)
2111             return zoom_complete;
2112         if (resultset->start + resultset->count > resultset->size)
2113             resultset->count = resultset->size - resultset->start;
2114         break;
2115     default:
2116         return zoom_complete;
2117     }
2118
2119     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
2120     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
2121
2122     if (c->error)                  /* don't continue on error */
2123         return zoom_complete;
2124     if (resultset->start < 0)
2125         return zoom_complete;
2126     for (i = 0; i<resultset->count; i++)
2127     {
2128         ZOOM_record rec =
2129             record_cache_lookup (resultset, i + resultset->start);
2130         if (!rec)
2131             break;
2132     }
2133     if (i == resultset->count)
2134         return zoom_complete;
2135
2136     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
2137     req = apdu->u.presentRequest;
2138
2139     resultset->start += i;
2140     resultset->count -= i;
2141     *req->resultSetStartPoint = resultset->start + 1;
2142     *req->numberOfRecordsRequested = resultset->step>0 ?
2143         resultset->step : resultset->count;
2144     assert (*req->numberOfRecordsRequested > 0);
2145
2146     if (syntax && *syntax)
2147         req->preferredRecordSyntax =
2148             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
2149
2150     if (resultset->schema && *resultset->schema)
2151     {
2152         Z_RecordComposition *compo = (Z_RecordComposition *)
2153             odr_malloc (c->odr_out, sizeof(*compo));
2154
2155         req->recordComposition = compo;
2156         compo->which = Z_RecordComp_complex;
2157         compo->u.complex = (Z_CompSpec *)
2158             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
2159         compo->u.complex->selectAlternativeSyntax = (bool_t *)
2160             odr_malloc(c->odr_out, sizeof(bool_t));
2161         *compo->u.complex->selectAlternativeSyntax = 0;
2162
2163         compo->u.complex->generic = (Z_Specification *)
2164             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
2165
2166         compo->u.complex->generic->which = Z_Schema_oid;
2167         compo->u.complex->generic->schema.oid = (Odr_oid *)
2168             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
2169
2170         if (!compo->u.complex->generic->schema.oid)
2171         {
2172             /* OID wasn't a schema! Try record syntax instead. */
2173
2174             compo->u.complex->generic->schema.oid = (Odr_oid *)
2175                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
2176         }
2177         if (elementSetName && *elementSetName)
2178         {
2179             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2180                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2181             compo->u.complex->generic->elementSpec->which =
2182                 Z_ElementSpec_elementSetName;
2183             compo->u.complex->generic->elementSpec->u.elementSetName =
2184                 odr_strdup (c->odr_out, elementSetName);
2185         }
2186         else
2187             compo->u.complex->generic->elementSpec = 0;
2188         compo->u.complex->num_dbSpecific = 0;
2189         compo->u.complex->dbSpecific = 0;
2190         compo->u.complex->num_recordSyntax = 0;
2191         compo->u.complex->recordSyntax = 0;
2192     }
2193     else if (elementSetName && *elementSetName)
2194     {
2195         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2196             odr_malloc (c->odr_out, sizeof(*esn));
2197         Z_RecordComposition *compo = (Z_RecordComposition *)
2198             odr_malloc (c->odr_out, sizeof(*compo));
2199
2200         esn->which = Z_ElementSetNames_generic;
2201         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
2202         compo->which = Z_RecordComp_simple;
2203         compo->u.simple = esn;
2204         req->recordComposition = compo;
2205     }
2206     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2207     return send_APDU (c, apdu);
2208 }
2209
2210 ZOOM_API(ZOOM_scanset)
2211 ZOOM_connection_scan (ZOOM_connection c, const char *start)
2212 {
2213     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
2214
2215     scan->connection = c;
2216     scan->odr = odr_createmem (ODR_DECODE);
2217     scan->options = ZOOM_options_create_with_parent (c->options);
2218     scan->refcount = 1;
2219     scan->scan_response = 0;
2220
2221     if ((scan->termListAndStartPoint =
2222          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
2223                       start)))
2224     {
2225         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
2226         task->u.scan.scan = scan;
2227
2228         (scan->refcount)++;
2229         if (!c->async)
2230         {
2231             while (ZOOM_event (1, &c))
2232                 ;
2233         }
2234     }
2235     return scan;
2236 }
2237
2238 ZOOM_API(void)
2239 ZOOM_scanset_destroy (ZOOM_scanset scan)
2240 {
2241     if (!scan)
2242         return;
2243     (scan->refcount)--;
2244     if (scan->refcount == 0)
2245     {
2246         odr_destroy (scan->odr);
2247
2248         ZOOM_options_destroy (scan->options);
2249         xfree (scan);
2250     }
2251 }
2252
2253 static zoom_ret send_package (ZOOM_connection c)
2254 {
2255     ZOOM_Event event;
2256     if (!c->tasks)
2257         return zoom_complete;
2258     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2259
2260     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
2261     ZOOM_connection_put_event (c, event);
2262
2263     return do_write_ex (c, c->tasks->u.package->buf_out,
2264                         c->tasks->u.package->len_out);
2265 }
2266
2267 static zoom_ret send_scan (ZOOM_connection c)
2268 {
2269     ZOOM_scanset scan;
2270     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2271     Z_ScanRequest *req = apdu->u.scanRequest;
2272     if (!c->tasks)
2273         return zoom_complete;
2274     assert (c->tasks->which == ZOOM_TASK_SCAN);
2275     scan = c->tasks->u.scan.scan;
2276
2277     req->termListAndStartPoint = scan->termListAndStartPoint;
2278     req->attributeSet = scan->attributeSet;
2279
2280     *req->numberOfTermsRequested =
2281         ZOOM_options_get_int(scan->options, "number", 10);
2282
2283     req->preferredPositionInResponse =
2284         odr_intdup (c->odr_out,
2285                     ZOOM_options_get_int(scan->options, "position", 1));
2286
2287     req->stepSize =
2288         odr_intdup (c->odr_out,
2289                     ZOOM_options_get_int(scan->options, "stepSize", 0));
2290
2291     req->databaseNames = set_DatabaseNames (c, scan->options,
2292                                             &req->num_databaseNames);
2293
2294     return send_APDU (c, apdu);
2295 }
2296
2297 ZOOM_API(size_t)
2298 ZOOM_scanset_size (ZOOM_scanset scan)
2299 {
2300     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2301         return 0;
2302     return scan->scan_response->entries->num_entries;
2303 }
2304
2305 ZOOM_API(const char *)
2306 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
2307                    int *occ, int *len)
2308 {
2309     const char *term = 0;
2310     size_t noent = ZOOM_scanset_size (scan);
2311     Z_ScanResponse *res = scan->scan_response;
2312
2313     *len = 0;
2314     *occ = 0;
2315     if (pos >= noent)
2316         return 0;
2317     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2318     {
2319         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2320
2321         if (t->term->which == Z_Term_general)
2322         {
2323             term = (const char *) t->term->u.general->buf;
2324             *len = t->term->u.general->len;
2325         }
2326         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2327     }
2328     return term;
2329 }
2330
2331 ZOOM_API(const char *)
2332 ZOOM_scanset_display_term (ZOOM_scanset scan, size_t pos,
2333                            int *occ, int *len)
2334 {
2335     const char *term = 0;
2336     size_t noent = ZOOM_scanset_size (scan);
2337     Z_ScanResponse *res = scan->scan_response;
2338
2339     *len = 0;
2340     *occ = 0;
2341     if (pos >= noent)
2342         return 0;
2343     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2344     {
2345         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2346
2347         if (t->displayTerm)
2348         {
2349             term = t->displayTerm;
2350             *len = strlen(term);
2351         }
2352         else if (t->term->which == Z_Term_general)
2353         {
2354             term = (const char *) t->term->u.general->buf;
2355             *len = t->term->u.general->len;
2356         }
2357         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2358     }
2359     return term;
2360 }
2361
2362 ZOOM_API(const char *)
2363 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2364 {
2365     return ZOOM_options_get (scan->options, key);
2366 }
2367
2368 ZOOM_API(void)
2369 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2370                               const char *val)
2371 {
2372     ZOOM_options_set (scan->options, key, val);
2373 }
2374
2375 static Z_APDU *create_es_package (ZOOM_package p, int type)
2376 {
2377     const char *str;
2378     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2379     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2380
2381     *req->function = Z_ExtendedServicesRequest_create;
2382
2383     str = ZOOM_options_get(p->options, "package-name");
2384     if (str && *str)
2385         req->packageName = nmem_strdup (p->odr_out->mem, str);
2386
2387     str = ZOOM_options_get(p->options, "user-id");
2388     if (str)
2389         req->userId = nmem_strdup (p->odr_out->mem, str);
2390
2391     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2392                                               type);
2393
2394     str = ZOOM_options_get(p->options, "function");
2395     if (str)
2396     {
2397         if (!strcmp (str, "create"))
2398             *req->function = 1;
2399         if (!strcmp (str, "delete"))
2400             *req->function = 2;
2401         if (!strcmp (str, "modify"))
2402             *req->function = 3;
2403     }
2404     return apdu;
2405 }
2406
2407 static const char *ill_array_lookup (void *clientData, const char *idx)
2408 {
2409     ZOOM_package p = (ZOOM_package) clientData;
2410     return ZOOM_options_get (p->options, idx+4);
2411 }
2412
2413 static Z_External *encode_ill_request (ZOOM_package p)
2414 {
2415     ODR out = p->odr_out;
2416     ILL_Request *req;
2417     Z_External *r = 0;
2418     struct ill_get_ctl ctl;
2419
2420     ctl.odr = p->odr_out;
2421     ctl.clientData = p;
2422     ctl.f = ill_array_lookup;
2423
2424     req = ill_get_ILLRequest(&ctl, "ill", 0);
2425
2426     if (!ill_Request (out, &req, 0, 0))
2427     {
2428         int ill_request_size;
2429         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2430         if (ill_request_buf)
2431             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2432         return 0;
2433     }
2434     else
2435     {
2436         oident oid;
2437         int illRequest_size = 0;
2438         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2439
2440         oid.proto = PROTO_GENERAL;
2441         oid.oclass = CLASS_GENERAL;
2442         oid.value = VAL_ISO_ILL_1;
2443
2444         r = (Z_External *) odr_malloc (out, sizeof(*r));
2445         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2446         r->indirect_reference = 0;
2447         r->descriptor = 0;
2448         r->which = Z_External_single;
2449
2450         r->u.single_ASN1_type = (Odr_oct *)
2451             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2452         r->u.single_ASN1_type->buf = (unsigned char*)
2453             odr_malloc (out, illRequest_size);
2454         r->u.single_ASN1_type->len = illRequest_size;
2455         r->u.single_ASN1_type->size = illRequest_size;
2456         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2457     }
2458     return r;
2459 }
2460
2461 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2462 {
2463     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2464     const char *str;
2465
2466     req->which=Z_IOItemOrder_esRequest;
2467     req->u.esRequest = (Z_IORequest *)
2468         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2469
2470     /* to keep part ... */
2471     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2472         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2473     req->u.esRequest->toKeep->supplDescription = 0;
2474     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2475         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2476
2477     str = ZOOM_options_get(p->options, "contact-name");
2478     req->u.esRequest->toKeep->contact->name = str ?
2479         nmem_strdup (p->odr_out->mem, str) : 0;
2480
2481     str = ZOOM_options_get(p->options, "contact-phone");
2482     req->u.esRequest->toKeep->contact->phone = str ?
2483         nmem_strdup (p->odr_out->mem, str) : 0;
2484
2485     str = ZOOM_options_get(p->options, "contact-email");
2486     req->u.esRequest->toKeep->contact->email = str ?
2487         nmem_strdup (p->odr_out->mem, str) : 0;
2488
2489     req->u.esRequest->toKeep->addlBilling = 0;
2490
2491     /* not to keep part ... */
2492     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2493         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2494
2495     str = ZOOM_options_get(p->options, "itemorder-setname");
2496     if (!str)
2497         str = "default";
2498
2499     if (!*str)
2500         req->u.esRequest->notToKeep->resultSetItem = 0;
2501     else
2502     {
2503         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2504            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2505
2506         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2507            nmem_strdup (p->odr_out->mem, str);
2508         req->u.esRequest->notToKeep->resultSetItem->item =
2509             (int *) odr_malloc(p->odr_out, sizeof(int));
2510
2511         str = ZOOM_options_get(p->options, "itemorder-item");
2512         *req->u.esRequest->notToKeep->resultSetItem->item =
2513             (str ? atoi(str) : 1);
2514     }
2515     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2516
2517     return req;
2518 }
2519
2520 Z_APDU *create_admin_package(ZOOM_package p, int type,
2521                              Z_ESAdminOriginPartToKeep **toKeepP,
2522                              Z_ESAdminOriginPartNotToKeep **notToKeepP)
2523 {
2524     Z_APDU *apdu = create_es_package (p, VAL_ADMINSERVICE);
2525     if (apdu)
2526     {
2527         Z_ESAdminOriginPartToKeep  *toKeep;
2528         Z_ESAdminOriginPartNotToKeep  *notToKeep;
2529         Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2530         const char *first_db = "Default";
2531         int num_db;
2532         char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2533         if (num_db > 0)
2534             first_db = db[0];
2535
2536         r->direct_reference =
2537             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2538                                    VAL_ADMINSERVICE);
2539         r->descriptor = 0;
2540         r->indirect_reference = 0;
2541         r->which = Z_External_ESAdmin;
2542
2543         r->u.adminService = (Z_Admin *)
2544             odr_malloc(p->odr_out, sizeof(*r->u.adminService));
2545         r->u.adminService->which = Z_Admin_esRequest;
2546         r->u.adminService->u.esRequest = (Z_AdminEsRequest *)
2547             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest));
2548
2549         toKeep = r->u.adminService->u.esRequest->toKeep =
2550             (Z_ESAdminOriginPartToKeep *)
2551             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest->toKeep));
2552         toKeep->which=type;
2553         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2554         toKeep->u.create=odr_nullval();
2555         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2556
2557         r->u.adminService->u.esRequest->notToKeep = notToKeep =
2558             (Z_ESAdminOriginPartNotToKeep *)
2559             odr_malloc(p->odr_out,
2560                        sizeof(*r->u.adminService->u.esRequest->notToKeep));
2561         notToKeep->which=Z_ESAdminOriginPartNotToKeep_recordsWillFollow;
2562         notToKeep->u.recordsWillFollow=odr_nullval();
2563         if (toKeepP)
2564             *toKeepP = toKeep;
2565         if (notToKeepP)
2566             *notToKeepP = notToKeep;
2567     }
2568     return apdu;
2569 }
2570
2571 static Z_APDU *create_update_package(ZOOM_package p)
2572 {
2573     Z_APDU *apdu = 0;
2574     const char *first_db = "Default";
2575     int num_db;
2576     char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2577     const char *action = ZOOM_options_get(p->options, "action");
2578     const char *recordIdOpaque = ZOOM_options_get(p->options, "recordIdOpaque");
2579     const char *recordIdNumber = ZOOM_options_get(p->options, "recordIdNumber");
2580     const char *record_buf = ZOOM_options_get(p->options, "record");
2581     const char *syntax_str = ZOOM_options_get(p->options, "syntax");
2582     int syntax_oid = VAL_NONE;
2583     int action_no = -1;
2584
2585     if (syntax_str)
2586         syntax_oid = oid_getvalbyname(syntax_str);
2587     if (!record_buf)
2588     {
2589         record_buf = "void";
2590         syntax_oid = VAL_SUTRS;
2591     }
2592     if (syntax_oid != VAL_NONE)
2593         syntax_oid = VAL_TEXT_XML;
2594
2595     if (num_db > 0)
2596         first_db = db[0];
2597
2598     if (!action)
2599         action = "specialUpdate";
2600
2601     if (!strcmp(action, "recordInsert"))
2602         action_no = Z_IUOriginPartToKeep_recordInsert;
2603     else if (!strcmp(action, "recordReplace"))
2604         action_no = Z_IUOriginPartToKeep_recordReplace;
2605     else if (!strcmp(action, "recordDelete"))
2606         action_no = Z_IUOriginPartToKeep_recordDelete;
2607     else if (!strcmp(action, "elementUpdate"))
2608         action_no = Z_IUOriginPartToKeep_elementUpdate;
2609     else if (!strcmp(action, "specialUpdate"))
2610         action_no = Z_IUOriginPartToKeep_specialUpdate;
2611     else
2612         return 0;
2613
2614     apdu = create_es_package (p, VAL_DBUPDATE);
2615     if (apdu)
2616     {
2617         Z_IUOriginPartToKeep *toKeep;
2618         Z_IUSuppliedRecords *notToKeep;
2619         Z_External *r = (Z_External *)
2620             odr_malloc (p->odr_out, sizeof(*r));
2621
2622         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2623
2624         r->direct_reference =
2625             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2626                                    VAL_DBUPDATE);
2627         r->descriptor = 0;
2628         r->which = Z_External_update;
2629         r->indirect_reference = 0;
2630         r->u.update = (Z_IUUpdate *)
2631             odr_malloc(p->odr_out, sizeof(*r->u.update));
2632
2633         r->u.update->which = Z_IUUpdate_esRequest;
2634         r->u.update->u.esRequest = (Z_IUUpdateEsRequest *)
2635             odr_malloc(p->odr_out, sizeof(*r->u.update->u.esRequest));
2636         toKeep = r->u.update->u.esRequest->toKeep =
2637             (Z_IUOriginPartToKeep *)
2638             odr_malloc(p->odr_out, sizeof(*toKeep));
2639
2640         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2641         toKeep->schema = 0;
2642         toKeep->elementSetName = 0;
2643         toKeep->actionQualifier = 0;
2644         toKeep->action = odr_intdup(p->odr_out, action_no);
2645
2646         notToKeep = r->u.update->u.esRequest->notToKeep =
2647             (Z_IUSuppliedRecords *)
2648             odr_malloc(p->odr_out, sizeof(*notToKeep));
2649         notToKeep->num = 1;
2650         notToKeep->elements = (Z_IUSuppliedRecords_elem **)
2651             odr_malloc(p->odr_out, sizeof(*notToKeep->elements));
2652         notToKeep->elements[0] = (Z_IUSuppliedRecords_elem *)
2653             odr_malloc(p->odr_out, sizeof(**notToKeep->elements));
2654         notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_opaque;
2655         if (recordIdOpaque)
2656         {
2657             notToKeep->elements[0]->u.opaque = (Odr_oct *)
2658                 odr_malloc (p->odr_out, sizeof(Odr_oct));
2659             notToKeep->elements[0]->u.opaque->size =
2660                 notToKeep->elements[0]->u.opaque->len = strlen(recordIdOpaque);
2661             notToKeep->elements[0]->u.opaque->buf = (unsigned char*)
2662                 odr_strdup(p->odr_out, recordIdOpaque);
2663         }
2664         else if (recordIdNumber)
2665         {
2666             notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_number;
2667
2668             notToKeep->elements[0]->u.number =
2669                 odr_intdup(p->odr_out, atoi(recordIdNumber));
2670         }
2671         else
2672             notToKeep->elements[0]->u.opaque = 0;
2673         notToKeep->elements[0]->supplementalId = 0;
2674         notToKeep->elements[0]->correlationInfo = 0;
2675         notToKeep->elements[0]->record =
2676             z_ext_record(p->odr_out, syntax_oid,
2677                          record_buf, strlen(record_buf));
2678     }
2679     if (0 && apdu)
2680     {
2681        ODR print = odr_createmem(ODR_PRINT);
2682
2683        z_APDU(print, &apdu, 0, 0);
2684        odr_destroy(print);
2685     }
2686     return apdu;
2687 }
2688
2689 ZOOM_API(void)
2690     ZOOM_package_send (ZOOM_package p, const char *type)
2691 {
2692     Z_APDU *apdu = 0;
2693     ZOOM_connection c;
2694     if (!p)
2695         return;
2696     c = p->connection;
2697     odr_reset (p->odr_out);
2698     xfree (p->buf_out);
2699     p->buf_out = 0;
2700     if (!strcmp(type, "itemorder"))
2701     {
2702         apdu = create_es_package (p, VAL_ITEMORDER);
2703         if (apdu)
2704         {
2705             Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2706
2707             r->direct_reference =
2708                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2709                                        VAL_ITEMORDER);
2710             r->descriptor = 0;
2711             r->which = Z_External_itemOrder;
2712             r->indirect_reference = 0;
2713             r->u.itemOrder = encode_item_order (p);
2714
2715             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2716         }
2717     }
2718     else if (!strcmp(type, "create"))  /* create database */
2719     {
2720         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_create,
2721                                     0, 0);
2722     }
2723     else if (!strcmp(type, "drop"))  /* drop database */
2724     {
2725         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_drop,
2726                                     0, 0);
2727     }
2728     else if (!strcmp(type, "commit"))  /* commit changes */
2729     {
2730         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_commit,
2731                                     0, 0);
2732     }
2733     else if (!strcmp(type, "update")) /* update record(s) */
2734     {
2735         apdu = create_update_package(p);
2736     }
2737     if (apdu)
2738     {
2739         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2740         {
2741             char *buf;
2742
2743             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2744             task->u.package = p;
2745             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2746             p->buf_out = (char *) xmalloc (p->len_out);
2747             memcpy (p->buf_out, buf, p->len_out);
2748
2749             (p->refcount)++;
2750             if (!c->async)
2751             {
2752                 while (ZOOM_event (1, &c))
2753                     ;
2754             }
2755         }
2756     }
2757 }
2758
2759 ZOOM_API(ZOOM_package)
2760     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2761 {
2762     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2763
2764     p->connection = c;
2765     p->odr_out = odr_createmem (ODR_ENCODE);
2766     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2767     p->refcount = 1;
2768     p->buf_out = 0;
2769     p->len_out = 0;
2770     return p;
2771 }
2772
2773 ZOOM_API(void)
2774     ZOOM_package_destroy(ZOOM_package p)
2775 {
2776     if (!p)
2777         return;
2778     (p->refcount)--;
2779     if (p->refcount == 0)
2780     {
2781         odr_destroy (p->odr_out);
2782         xfree (p->buf_out);
2783
2784         ZOOM_options_destroy (p->options);
2785         xfree (p);
2786     }
2787 }
2788
2789 ZOOM_API(const char *)
2790 ZOOM_package_option_get (ZOOM_package p, const char *key)
2791 {
2792     return ZOOM_options_get (p->options, key);
2793 }
2794
2795
2796 ZOOM_API(void)
2797 ZOOM_package_option_set (ZOOM_package p, const char *key,
2798                               const char *val)
2799 {
2800     ZOOM_options_set (p->options, key, val);
2801 }
2802
2803 static int ZOOM_connection_exec_task (ZOOM_connection c)
2804 {
2805     ZOOM_task task = c->tasks;
2806     zoom_ret ret = zoom_complete;
2807
2808     if (!task)
2809     {
2810         yaz_log (log_level, "ZOOM_connection_exec_task task=<null>");
2811         return 0;
2812     }
2813     yaz_log (log_level, "ZOOM_connection_exec_task type=%d run=%d",
2814              task->which, task->running);
2815     if (c->error != ZOOM_ERROR_NONE)
2816     {
2817         yaz_log (log_level, "remove tasks because of error = %d", c->error);
2818         ZOOM_connection_remove_tasks (c);
2819         return 0;
2820     }
2821     if (task->running)
2822     {
2823         yaz_log (log_level, "task already running");
2824         return 0;
2825     }
2826     task->running = 1;
2827     ret = zoom_complete;
2828     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2829     {
2830         switch (task->which)
2831         {
2832         case ZOOM_TASK_SEARCH:
2833             if (c->proto == PROTO_HTTP)
2834                 ret = ZOOM_connection_srw_send_search(c);
2835             else
2836                 ret = ZOOM_connection_send_search(c);
2837             break;
2838         case ZOOM_TASK_RETRIEVE:
2839             if (c->proto == PROTO_HTTP)
2840                 ret = ZOOM_connection_srw_send_search(c);
2841             else
2842                 ret = send_present (c);
2843             break;
2844         case ZOOM_TASK_CONNECT:
2845             ret = do_connect(c);
2846             break;
2847         case ZOOM_TASK_SCAN:
2848             ret = send_scan(c);
2849             break;
2850         case ZOOM_TASK_PACKAGE:
2851             ret = send_package(c);
2852             break;
2853         case ZOOM_TASK_SORT:
2854             c->tasks->u.sort.resultset->r_sort_spec =
2855                 c->tasks->u.sort.q->sort_spec;
2856             ret = send_sort(c, c->tasks->u.sort.resultset);
2857             break;
2858         }
2859     }
2860     else
2861     {
2862         yaz_log (log_level, "remove tasks because no connection exist");
2863         ZOOM_connection_remove_tasks (c);
2864     }
2865     if (ret == zoom_complete)
2866     {
2867         yaz_log (log_level, "task removed (complete)");
2868         ZOOM_connection_remove_task (c);
2869         return 0;
2870     }
2871     yaz_log (log_level, "task pending");
2872     return 1;
2873 }
2874
2875 static zoom_ret send_sort_present (ZOOM_connection c)
2876 {
2877     zoom_ret r = zoom_complete;
2878
2879     if (c->tasks && c->tasks->which == ZOOM_TASK_SEARCH)
2880         r = send_sort (c, c->tasks->u.search.resultset);
2881     if (r == zoom_complete)
2882         r = send_present (c);
2883     return r;
2884 }
2885
2886 static int es_response (ZOOM_connection c,
2887                         Z_ExtendedServicesResponse *res)
2888 {
2889     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2890         return 0;
2891     if (res->diagnostics && res->num_diagnostics > 0)
2892         response_diag(c, res->diagnostics[0]);
2893     if (res->taskPackage &&
2894         res->taskPackage->which == Z_External_extendedService)
2895     {
2896         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2897         Odr_oct *id = taskPackage->targetReference;
2898
2899         if (id)
2900             ZOOM_options_setl (c->tasks->u.package->options,
2901                                "targetReference", (char*) id->buf, id->len);
2902     }
2903     return 1;
2904 }
2905
2906
2907 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2908 {
2909     Z_InitResponse *initrs;
2910
2911     c->mask = 0;
2912     yaz_log (log_level, "recv APDU type=%d", apdu->which);
2913     switch(apdu->which)
2914     {
2915     case Z_APDU_initResponse:
2916         initrs = apdu->u.initResponse;
2917         ZOOM_connection_option_set(c, "serverImplementationId",
2918                                    initrs->implementationId ?
2919                                    initrs->implementationId : "");
2920         ZOOM_connection_option_set(c, "serverImplementationName",
2921                                    initrs->implementationName ?
2922                                    initrs->implementationName : "");
2923         ZOOM_connection_option_set(c, "serverImplementationVersion",
2924                                    initrs->implementationVersion ?
2925                                    initrs->implementationVersion : "");
2926         /* Set the three old options too, for old applications */
2927         ZOOM_connection_option_set(c, "targetImplementationId",
2928                                    initrs->implementationId ?
2929                                    initrs->implementationId : "");
2930         ZOOM_connection_option_set(c, "targetImplementationName",
2931                                    initrs->implementationName ?
2932                                    initrs->implementationName : "");
2933         ZOOM_connection_option_set(c, "targetImplementationVersion",
2934                                    initrs->implementationVersion ?
2935                                    initrs->implementationVersion : "");
2936         if (!*initrs->result)
2937         {
2938             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2939         }
2940         else
2941         {
2942             char *cookie =
2943                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2944                                           VAL_COOKIE, 1, 0);
2945             xfree (c->cookie_in);
2946             c->cookie_in = 0;
2947             if (cookie)
2948                 c->cookie_in = xstrdup(cookie);
2949             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2950                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2951                 c->support_named_resultsets = 1;
2952             if (c->tasks)
2953             {
2954                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2955                 ZOOM_connection_remove_task (c);
2956             }
2957             ZOOM_connection_exec_task (c);
2958         }
2959         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2960         {
2961             NMEM tmpmem = nmem_create();
2962             Z_CharSetandLanguageNegotiation *p =
2963                 yaz_get_charneg_record(initrs->otherInfo);
2964
2965             if (p)
2966             {
2967                 char *charset=NULL, *lang=NULL;
2968                 int sel;
2969
2970                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2971                 yaz_log(log_level, "Target accepted: charset %s, "
2972                         "language %s, select %d",
2973                         charset ? charset : "none", lang ? lang : "none", sel);
2974                 if (charset)
2975                     ZOOM_connection_option_set (c, "negotiation-charset",
2976                                                 charset);
2977                 if (lang)
2978                     ZOOM_connection_option_set (c, "negotiation-lang",
2979                                                 lang);
2980                 nmem_destroy(tmpmem);
2981             }
2982         }
2983         break;
2984     case Z_APDU_searchResponse:
2985         handle_search_response (c, apdu->u.searchResponse);
2986         if (send_sort_present (c) == zoom_complete)
2987             ZOOM_connection_remove_task (c);
2988         break;
2989     case Z_APDU_presentResponse:
2990         handle_present_response (c, apdu->u.presentResponse);
2991         if (send_present (c) == zoom_complete)
2992             ZOOM_connection_remove_task (c);
2993         break;
2994     case Z_APDU_sortResponse:
2995         sort_response (c, apdu->u.sortResponse);
2996         if (send_present (c) == zoom_complete)
2997             ZOOM_connection_remove_task (c);
2998         break;
2999     case Z_APDU_scanResponse:
3000         scan_response (c, apdu->u.scanResponse);
3001         ZOOM_connection_remove_task (c);
3002         break;
3003     case Z_APDU_extendedServicesResponse:
3004         es_response (c, apdu->u.extendedServicesResponse);
3005         ZOOM_connection_remove_task (c);
3006         break;
3007     case Z_APDU_close:
3008         if (c->reconnect_ok)
3009         {
3010             do_close(c);
3011             c->tasks->running = 0;
3012             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3013         }
3014         else
3015         {
3016             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3017             do_close(c);
3018         }
3019         break;
3020     default:
3021         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3022         do_close(c);
3023     }
3024 }
3025
3026 #if HAVE_XML2
3027 static void handle_srw_response(ZOOM_connection c,
3028                                 Z_SRW_searchRetrieveResponse *res)
3029 {
3030     ZOOM_resultset resultset = 0;
3031     int i;
3032     NMEM nmem;
3033     ZOOM_Event event;
3034
3035     if (!c->tasks)
3036         return;
3037
3038     if (c->tasks->which == ZOOM_TASK_SEARCH)
3039         resultset = c->tasks->u.search.resultset;
3040     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
3041         resultset = c->tasks->u.retrieve.resultset;
3042     else
3043         return ;
3044
3045     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
3046     ZOOM_connection_put_event(c, event);
3047
3048     resultset->size = 0;
3049
3050     yaz_log(log_level, "got SRW response OK");
3051
3052     if (res->numberOfRecords)
3053         resultset->size = *res->numberOfRecords;
3054
3055     for (i = 0; i<res->num_records; i++)
3056     {
3057         int pos;
3058
3059         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
3060             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
3061
3062         if (res->records[i].recordPosition &&
3063             *res->records[i].recordPosition > 0)
3064             pos = *res->records[i].recordPosition - 1;
3065         else
3066             pos = resultset->start + i;
3067
3068         npr->databaseName = 0;
3069         npr->which = Z_NamePlusRecord_databaseRecord;
3070         npr->u.databaseRecord = (Z_External *)
3071             odr_malloc(c->odr_in, sizeof(Z_External));
3072         npr->u.databaseRecord->descriptor = 0;
3073         npr->u.databaseRecord->direct_reference =
3074             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
3075         npr->u.databaseRecord->which = Z_External_octet;
3076         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
3077             odr_malloc(c->odr_in, sizeof(Odr_oct));
3078         npr->u.databaseRecord->u.octet_aligned->buf = (unsigned char*)
3079             res->records[i].recordData_buf;
3080         npr->u.databaseRecord->u.octet_aligned->len =
3081             npr->u.databaseRecord->u.octet_aligned->size =
3082             res->records[i].recordData_len;
3083         record_cache_add (resultset, npr, pos);
3084     }
3085     if (res->num_diagnostics > 0)
3086     {
3087         const char *uri = res->diagnostics[0].uri;
3088         if (uri)
3089         {
3090             int code = 0;
3091             const char *cp;
3092             if ((cp = strrchr(uri, '/')))
3093                 code = atoi(cp+1);
3094             set_dset_error(c, code, uri,
3095                            res->diagnostics[0].details, 0);
3096         }
3097     }
3098     nmem = odr_extract_mem(c->odr_in);
3099     nmem_transfer(resultset->odr->mem, nmem);
3100     nmem_destroy(nmem);
3101 }
3102 #endif
3103
3104 #if HAVE_XML2
3105 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
3106 {
3107     int ret = -1;
3108     const char *content_type = z_HTTP_header_lookup(hres->headers,
3109                                                     "Content-Type");
3110     const char *connection_head = z_HTTP_header_lookup(hres->headers,
3111                                                        "Connection");
3112     c->mask = 0;
3113     yaz_log (log_level, "handle_http");
3114
3115     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
3116     {
3117         Z_SOAP *soap_package = 0;
3118         ODR o = c->odr_in;
3119         Z_SOAP_Handler soap_handlers[2] = {
3120             {"http://www.loc.gov/zing/srw/", 0,
3121              (Z_SOAP_fun) yaz_srw_codec},
3122             {0, 0, 0}
3123         };
3124         ret = z_soap_codec(o, &soap_package,
3125                            &hres->content_buf, &hres->content_len,
3126                            soap_handlers);
3127         if (!ret && soap_package->which == Z_SOAP_generic &&
3128             soap_package->u.generic->no == 0)
3129         {
3130             Z_SRW_PDU *sr = (Z_SRW_PDU*) soap_package->u.generic->p;
3131             if (sr->which == Z_SRW_searchRetrieve_response)
3132                 handle_srw_response(c, sr->u.response);
3133             else
3134                 ret = -1;
3135         }
3136         else if (!ret && (soap_package->which == Z_SOAP_fault
3137                           || soap_package->which == Z_SOAP_error))
3138         {
3139             set_HTTP_error(c, hres->code,
3140                            soap_package->u.fault->fault_code,
3141                            soap_package->u.fault->fault_string);
3142         }
3143         else
3144             ret = -1;
3145     }
3146     if (ret)
3147     {
3148         if (hres->code != 200)
3149             set_HTTP_error(c, hres->code, 0, 0);
3150         else
3151             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3152         do_close (c);
3153     }
3154     ZOOM_connection_remove_task(c);
3155     if (!strcmp(hres->version, "1.0"))
3156     {
3157         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
3158         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
3159             do_close(c);
3160     }
3161     else
3162     {
3163         /* HTTP 1.1: only if no close we stay alive .. */
3164         if (connection_head && !strcmp(connection_head, "close"))
3165             do_close(c);
3166     }
3167 }
3168 #endif
3169
3170 static int do_read (ZOOM_connection c)
3171 {
3172     int r, more;
3173     ZOOM_Event event;
3174
3175     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
3176     ZOOM_connection_put_event (c, event);
3177
3178     r = cs_get (c->cs, &c->buf_in, &c->len_in);
3179     more = cs_more(c->cs);
3180     yaz_log (log_level, "do_read len=%d more=%d", r, more);
3181     if (r == 1)
3182         return 0;
3183     if (r <= 0)
3184     {
3185         if (c->reconnect_ok)
3186         {
3187             do_close (c);
3188             c->reconnect_ok = 0;
3189             yaz_log (log_level, "reconnect read");
3190             c->tasks->running = 0;
3191             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3192         }
3193         else
3194         {
3195             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3196             do_close (c);
3197         }
3198     }
3199     else
3200     {
3201         Z_GDU *gdu;
3202         ZOOM_Event event;
3203
3204         odr_reset (c->odr_in);
3205         odr_setbuf (c->odr_in, c->buf_in, r, 0);
3206         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
3207         ZOOM_connection_put_event (c, event);
3208
3209         if (!z_GDU (c->odr_in, &gdu, 0, 0))
3210         {
3211             int x;
3212             int err = odr_geterrorx(c->odr_in, &x);
3213             char msg[60];
3214             const char *element = odr_getelement(c->odr_in);
3215             sprintf (msg, "ODR code %d:%d element=%-20s",
3216                      err, x, element ? element : "<unknown>");
3217             set_ZOOM_error(c, ZOOM_ERROR_DECODE, msg);
3218             do_close (c);
3219         }
3220         else if (gdu->which == Z_GDU_Z3950)
3221             handle_apdu (c, gdu->u.z3950);
3222         else if (gdu->which == Z_GDU_HTTP_Response)
3223         {
3224 #if HAVE_XML2
3225             handle_http (c, gdu->u.HTTP_Response);
3226 #else
3227             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3228             do_close (c);
3229 #endif
3230         }
3231         c->reconnect_ok = 0;
3232     }
3233     return 1;
3234 }
3235
3236 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
3237 {
3238     int r;
3239     ZOOM_Event event;
3240
3241     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
3242     ZOOM_connection_put_event (c, event);
3243
3244     yaz_log (log_level, "do_write_ex len=%d", len_out);
3245     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
3246     {
3247         if (c->reconnect_ok)
3248         {
3249             do_close (c);
3250             c->reconnect_ok = 0;
3251             yaz_log (log_level, "reconnect write");
3252             c->tasks->running = 0;
3253             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3254             return zoom_pending;
3255         }
3256         if (c->state == STATE_CONNECTING)
3257             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3258         else
3259             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3260         do_close (c);
3261         return zoom_complete;
3262     }
3263     else if (r == 1)
3264     {
3265         c->mask = ZOOM_SELECT_EXCEPT;
3266         if (c->cs->io_pending & CS_WANT_WRITE)
3267             c->mask += ZOOM_SELECT_WRITE;
3268         if (c->cs->io_pending & CS_WANT_READ)
3269             c->mask += ZOOM_SELECT_READ;
3270         yaz_log (log_level, "do_write_ex 1 mask=%d", c->mask);
3271     }
3272     else
3273     {
3274         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
3275         yaz_log (log_level, "do_write_ex 2 mask=%d", c->mask);
3276     }
3277     return zoom_pending;
3278 }
3279
3280 static zoom_ret do_write(ZOOM_connection c)
3281 {
3282     return do_write_ex (c, c->buf_out, c->len_out);
3283 }
3284
3285
3286 ZOOM_API(const char *)
3287 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
3288 {
3289     return ZOOM_options_get (c->options, key);
3290 }
3291
3292 ZOOM_API(void)
3293 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
3294                             const char *val)
3295 {
3296     ZOOM_options_set (c->options, key, val);
3297 }
3298
3299 ZOOM_API(void)
3300 ZOOM_connection_option_setl (ZOOM_connection c, const char *key,
3301                              const char *val, int len)
3302 {
3303     ZOOM_options_setl (c->options, key, val, len);
3304 }
3305
3306 ZOOM_API(const char *)
3307 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
3308 {
3309     return ZOOM_options_get (r->options, key);
3310 }
3311
3312 ZOOM_API(void)
3313 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
3314                                   const char *val)
3315 {
3316     ZOOM_options_set (r->options, key, val);
3317 }
3318
3319
3320 ZOOM_API(int)
3321 ZOOM_connection_errcode (ZOOM_connection c)
3322 {
3323     return ZOOM_connection_error (c, 0, 0);
3324 }
3325
3326 ZOOM_API(const char *)
3327 ZOOM_connection_errmsg (ZOOM_connection c)
3328 {
3329     const char *msg;
3330     ZOOM_connection_error (c, &msg, 0);
3331     return msg;
3332 }
3333
3334 ZOOM_API(const char *)
3335 ZOOM_connection_addinfo (ZOOM_connection c)
3336 {
3337     const char *addinfo;
3338     ZOOM_connection_error (c, 0, &addinfo);
3339     return addinfo;
3340 }
3341
3342 ZOOM_API(const char *)
3343 ZOOM_diag_str (int error)
3344 {
3345     switch (error)
3346     {
3347     case ZOOM_ERROR_NONE:
3348         return "No error";
3349     case ZOOM_ERROR_CONNECT:
3350         return "Connect failed";
3351     case ZOOM_ERROR_MEMORY:
3352         return "Out of memory";
3353     case ZOOM_ERROR_ENCODE:
3354         return "Encoding failed";
3355     case ZOOM_ERROR_DECODE:
3356         return "Decoding failed";
3357     case ZOOM_ERROR_CONNECTION_LOST:
3358         return "Connection lost";
3359     case ZOOM_ERROR_INIT:
3360         return "Init rejected";
3361     case ZOOM_ERROR_INTERNAL:
3362         return "Internal failure";
3363     case ZOOM_ERROR_TIMEOUT:
3364         return "Timeout";
3365     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
3366         return "Unsupported protocol";
3367     case ZOOM_ERROR_UNSUPPORTED_QUERY:
3368         return "Unsupported query type";
3369     case ZOOM_ERROR_INVALID_QUERY:
3370         return "Invalid query";
3371     default:
3372         return diagbib1_str (error);
3373     }
3374 }
3375
3376 ZOOM_API(int)
3377 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
3378                          const char **addinfo, const char **diagset)
3379 {
3380     int error = c->error;
3381     if (cp)
3382     {
3383         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
3384             *cp = ZOOM_diag_str(error);
3385         else if (!strcmp(c->diagset, "HTTP"))
3386             *cp = z_HTTP_errmsg(c->error);
3387         else if (!strcmp(c->diagset, "Bib-1"))
3388             *cp = ZOOM_diag_str(error);
3389         else if (!strcmp(c->diagset, "info:srw/diagnostic/1"))
3390             *cp = yaz_diag_srw_str(c->error);
3391         else
3392             *cp = "Unknown error and diagnostic set";
3393     }
3394     if (addinfo)
3395         *addinfo = c->addinfo ? c->addinfo : "";
3396     if (diagset)
3397         *diagset = c->diagset ? c->diagset : "";
3398     return c->error;
3399 }
3400
3401 ZOOM_API(int)
3402 ZOOM_connection_error (ZOOM_connection c, const char **cp,
3403                        const char **addinfo)
3404 {
3405     return ZOOM_connection_error_x(c, cp, addinfo, 0);
3406 }
3407
3408 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
3409 {
3410     ZOOM_Event event = 0;
3411     int r = cs_look(c->cs);
3412     yaz_log (log_level, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
3413              c, mask, r);
3414
3415     if (r == CS_NONE)
3416     {
3417         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3418         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3419         do_close (c);
3420         ZOOM_connection_put_event (c, event);
3421     }
3422     else if (r == CS_CONNECT)
3423     {
3424         int ret;
3425         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3426
3427         ret = cs_rcvconnect (c->cs);
3428         yaz_log (log_level, "cs_rcvconnect returned %d", ret);
3429         if (ret == 1)
3430         {
3431             c->mask = ZOOM_SELECT_EXCEPT;
3432             if (c->cs->io_pending & CS_WANT_WRITE)
3433                 c->mask += ZOOM_SELECT_WRITE;
3434             if (c->cs->io_pending & CS_WANT_READ)
3435                 c->mask += ZOOM_SELECT_READ;
3436             ZOOM_connection_put_event (c, event);
3437         }
3438         else if (ret == 0)
3439         {
3440             ZOOM_connection_put_event (c, event);
3441             get_cert(c);
3442             if (c->proto == PROTO_Z3950)
3443                 ZOOM_connection_send_init(c);
3444             else
3445             {
3446                 /* no init request for SRW .. */
3447                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
3448                 ZOOM_connection_remove_task (c);
3449                 c->mask = 0;
3450                 ZOOM_connection_exec_task (c);
3451             }
3452             c->state = STATE_ESTABLISHED;
3453         }
3454         else
3455         {
3456             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3457             do_close (c);
3458             ZOOM_connection_put_event (c, event);
3459         }
3460     }
3461     else
3462     {
3463         if (mask & ZOOM_SELECT_READ)
3464             do_read (c);
3465         if (c->cs && (mask & ZOOM_SELECT_WRITE))
3466             do_write (c);
3467     }
3468     return 1;
3469 }
3470
3471 ZOOM_API(int)
3472 ZOOM_connection_last_event(ZOOM_connection cs)
3473 {
3474     if (!cs)
3475         return ZOOM_EVENT_NONE;
3476     return cs->last_event;
3477 }
3478
3479 ZOOM_API(int)
3480 ZOOM_event (int no, ZOOM_connection *cs)
3481 {
3482     int timeout = 5000;
3483 #if HAVE_SYS_POLL_H
3484     struct pollfd pollfds[1024];
3485     ZOOM_connection poll_cs[1024];
3486 #else
3487     struct timeval tv;
3488     fd_set input, output, except;
3489 #endif
3490     int i, r, nfds;
3491     int max_fd = 0;
3492
3493     for (i = 0; i<no; i++)
3494     {
3495         ZOOM_connection c = cs[i];
3496         ZOOM_Event event;
3497         if (c && (event = ZOOM_connection_get_event(c)))
3498         {
3499             ZOOM_Event_destroy (event);
3500             return i+1;
3501         }
3502     }
3503     for (i = 0; i<no; i++)
3504     {
3505         ZOOM_connection c = cs[i];
3506         ZOOM_Event event;
3507         if (c && ZOOM_connection_exec_task (c))
3508         {
3509             if ((event = ZOOM_connection_get_event(c)))
3510             {
3511                 ZOOM_Event_destroy (event);
3512                 return i+1;
3513             }
3514         }
3515     }
3516 #if HAVE_SYS_POLL_H
3517
3518 #else
3519     FD_ZERO (&input);
3520     FD_ZERO (&output);
3521     FD_ZERO (&except);
3522 #endif
3523     nfds = 0;
3524     for (i = 0; i<no; i++)
3525     {
3526         ZOOM_connection c = cs[i];
3527         int fd, mask;
3528         int this_timeout;
3529
3530         if (!c)
3531             continue;
3532         fd = z3950_connection_socket(c);
3533         mask = z3950_connection_mask(c);
3534
3535         if (fd == -1)
3536             continue;
3537         if (max_fd < fd)
3538             max_fd = fd;
3539
3540         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
3541         if (this_timeout != -1 && this_timeout < timeout)
3542             timeout = this_timeout;
3543 #if HAVE_SYS_POLL_H
3544         if (mask)
3545         {
3546             short poll_events = 0;
3547
3548             if (mask & ZOOM_SELECT_READ)
3549                 poll_events += POLLIN;
3550             if (mask & ZOOM_SELECT_WRITE)
3551                 poll_events += POLLOUT;
3552             if (mask & ZOOM_SELECT_EXCEPT)
3553                 poll_events += POLLERR;
3554             pollfds[nfds].fd = fd;
3555             pollfds[nfds].events = poll_events;
3556             pollfds[nfds].revents = 0;
3557             poll_cs[nfds] = c;
3558             nfds++;
3559         }
3560 #else
3561         if (mask & ZOOM_SELECT_READ)
3562         {
3563             FD_SET (fd, &input);
3564             nfds++;
3565         }
3566         if (mask & ZOOM_SELECT_WRITE)
3567         {
3568             FD_SET (fd, &output);
3569             nfds++;
3570         }
3571         if (mask & ZOOM_SELECT_EXCEPT)
3572         {
3573             FD_SET (fd, &except);
3574             nfds++;
3575         }
3576 #endif
3577     }
3578     if (timeout >= 5000)
3579         timeout = 30;
3580
3581     if (!nfds)
3582         return 0;
3583
3584 #if HAVE_SYS_POLL_H
3585     r = poll (pollfds, nfds, timeout * 1000);
3586     for (i = 0; i<nfds; i++)
3587     {
3588         ZOOM_connection c = poll_cs[i];
3589         if (r && c->mask)
3590         {
3591             int mask = 0;
3592             if (pollfds[i].revents & POLLIN)
3593                 mask += ZOOM_SELECT_READ;
3594             if (pollfds[i].revents & POLLOUT)
3595                 mask += ZOOM_SELECT_WRITE;
3596             if (pollfds[i].revents & POLLERR)
3597                 mask += ZOOM_SELECT_EXCEPT;
3598             if (mask)
3599                 ZOOM_connection_do_io(c, mask);
3600         }
3601         else if (r == 0 && c->mask)
3602         {
3603             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3604             /* timeout and this connection was waiting */
3605             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3606             do_close (c);
3607             ZOOM_connection_put_event(c, event);
3608         }
3609     }
3610 #else
3611     tv.tv_sec = timeout;
3612     tv.tv_usec = 0;
3613     yaz_log (log_level, "select start");
3614     r = select (max_fd+1, &input, &output, &except, &tv);
3615     yaz_log (log_level, "select stop, returned r=%d", r);
3616     for (i = 0; i<no; i++)
3617     {
3618         ZOOM_connection c = cs[i];
3619         int fd, mask;
3620
3621         if (!c)
3622             continue;
3623         fd = z3950_connection_socket(c);
3624         mask = 0;
3625         if (r && c->mask)
3626         {
3627             /* no timeout and real socket */
3628             if (FD_ISSET(fd, &input))
3629                 mask += ZOOM_SELECT_READ;
3630             if (FD_ISSET(fd, &output))
3631                 mask += ZOOM_SELECT_WRITE;
3632             if (FD_ISSET(fd, &except))
3633                 mask += ZOOM_SELECT_EXCEPT;
3634             if (mask)
3635                 ZOOM_connection_do_io(c, mask);
3636         }
3637         if (r == 0 && c->mask)
3638         {
3639             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3640             /* timeout and this connection was waiting */
3641             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3642             do_close (c);
3643             yaz_log (log_level, "timeout");
3644             ZOOM_connection_put_event(c, event);
3645         }
3646     }
3647 #endif
3648     for (i = 0; i<no; i++)
3649     {
3650         ZOOM_connection c = cs[i];
3651         ZOOM_Event event;
3652         if (c && (event = ZOOM_connection_get_event(c)))
3653         {
3654             ZOOM_Event_destroy (event);
3655             return i+1;
3656         }
3657     }
3658     return 0;
3659 }