zutil/zoom-c.c

   1 /*
   2  * Copyright (c) 2000-2003, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: zoom-c.c,v 1.34 2003-05-14 20:58:07 adam Exp $
   6  *
   7  * ZOOM layer for C, connections, result sets, queries.
   8  */
   9 #include <assert.h>
  10 #include <string.h>
  11 #include "zoom-p.h"
  12
  13 #include <yaz/yaz-util.h>
  14 #include <yaz/xmalloc.h>
  15 #include <yaz/otherinfo.h>
  16 #include <yaz/log.h>
  17 #include <yaz/pquery.h>
  18 #include <yaz/marcdisp.h>
  19 #include <yaz/diagbib1.h>
  20 #include <yaz/charneg.h>
  21 #include <yaz/ill.h>
  22 #include <yaz/srw.h>
  23
  24 #if HAVE_SYS_POLL_H
  25 #include <sys/poll.h>
  26 #endif
  27
  28 typedef enum {
  29     zoom_pending,
  30     zoom_complete
  31 } zoom_ret;
  32
  33 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  34 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  35
  36 static ZOOM_Event ZOOM_Event_create (int kind)
  37 {
  38     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  39     event->kind = kind;
  40     event->next = 0;
  41     event->prev = 0;
  42     return event;
  43 }
  44
  45 static void ZOOM_Event_destroy (ZOOM_Event event)
  46 {
  47     xfree (event);
  48 }
  49
  50 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  51 {
  52     if (c->m_queue_back)
  53     {
  54         c->m_queue_back->prev = event;
  55         assert (c->m_queue_front);
  56     }
  57     else
  58     {
  59         assert (!c->m_queue_front);
  60         c->m_queue_front = event;
  61     }
  62     event->next = c->m_queue_back;
  63     event->prev = 0;
  64     c->m_queue_back = event;
  65 }
  66
  67 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  68 {
  69     ZOOM_Event event = c->m_queue_front;
  70     if (!event)
  71     {
  72         c->last_event = ZOOM_EVENT_NONE;
  73         return 0;
  74     }
  75     assert (c->m_queue_back);
  76     c->m_queue_front = event->prev;
  77     if (c->m_queue_front)
  78     {
  79         assert (c->m_queue_back);
  80         c->m_queue_front->next = 0;
  81     }
  82     else
  83         c->m_queue_back = 0;
  84     c->last_event = event->kind;
  85     return event;
  86 }
  87
  88
  89 static void set_dset_error (ZOOM_connection c, int error,
  90                             const char *dset,
  91                             const char *addinfo, const char *addinfo2)
  92 {
  93     xfree (c->addinfo);
  94     c->addinfo = 0;
  95     c->error = error;
  96     c->diagset = dset;
  97     if (addinfo && addinfo2)
  98     {
  99         c->addinfo = xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
 100         strcpy(c->addinfo, addinfo);
 101         strcat(c->addinfo, addinfo2);
 102     }
 103     else if (addinfo)
 104         c->addinfo = xstrdup(addinfo);
 105     if (error)
 106         yaz_log(LOG_DEBUG, "Error %s %s:%d %s %s",
 107                 c->host_port ? c->host_port : "<>", dset, error,
 108                 addinfo ? addinfo : "",
 109                 addinfo2 ? addinfo2 : "");
 110 }
 111
 112 #if HAVE_XML2
 113 static void set_HTTP_error (ZOOM_connection c, int error,
 114                             const char *addinfo, const char *addinfo2)
 115 {
 116     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 117 }
 118 #endif
 119
 120 static void set_ZOOM_error (ZOOM_connection c, int error,
 121                             const char *addinfo)
 122 {
 123     set_dset_error(c, error, "ZOOM", addinfo, 0);
 124 }
 125
 126 static void clear_error (ZOOM_connection c)
 127 {
 128
 129     switch (c->error)
 130     {
 131     case ZOOM_ERROR_CONNECT:
 132     case ZOOM_ERROR_MEMORY:
 133     case ZOOM_ERROR_DECODE:
 134     case ZOOM_ERROR_CONNECTION_LOST:
 135     case ZOOM_ERROR_INIT:
 136     case ZOOM_ERROR_INTERNAL:
 137     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 138         break;
 139     default:
 140         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 141     }
 142 }
 143
 144 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 145 {
 146     ZOOM_task *taskp = &c->tasks;
 147     while (*taskp)
 148         taskp = &(*taskp)->next;
 149     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 150     (*taskp)->running = 0;
 151     (*taskp)->which = which;
 152     (*taskp)->next = 0;
 153     clear_error (c);
 154     return *taskp;
 155 }
 156
 157 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 158 {
 159     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 160
 161     task->next = c->tasks;
 162     c->tasks = task;
 163
 164     task->running = 0;
 165     task->which = which;
 166     clear_error (c);
 167     return task;
 168 }
 169
 170 void ZOOM_connection_remove_task (ZOOM_connection c)
 171 {
 172     ZOOM_task task = c->tasks;
 173
 174     if (task)
 175     {
 176         c->tasks = task->next;
 177         switch (task->which)
 178         {
 179         case ZOOM_TASK_SEARCH:
 180
 181             ZOOM_resultset_destroy (task->u.search.resultset);
 182             break;
 183         case ZOOM_TASK_RETRIEVE:
 184             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 185             break;
 186         case ZOOM_TASK_CONNECT:
 187             break;
 188         case ZOOM_TASK_SCAN:
 189             ZOOM_scanset_destroy (task->u.scan.scan);
 190             break;
 191         case ZOOM_TASK_PACKAGE:
 192             ZOOM_package_destroy (task->u.package);
 193             break;
 194         default:
 195             assert (0);
 196         }
 197         xfree (task);
 198     }
 199 }
 200
 201 static int ZOOM_connection_exec_task (ZOOM_connection c);
 202
 203 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 204 {
 205     while (c->tasks)
 206         ZOOM_connection_remove_task(c);
 207 }
 208
 209 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 210
 211 ZOOM_API(ZOOM_connection)
 212 ZOOM_connection_create (ZOOM_options options)
 213 {
 214     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 215
 216     c->proto = PROTO_Z3950;
 217     c->cs = 0;
 218     c->mask = 0;
 219     c->reconnect_ok = 0;
 220     c->state = STATE_IDLE;
 221     c->addinfo = 0;
 222     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 223     c->buf_in = 0;
 224     c->len_in = 0;
 225     c->buf_out = 0;
 226     c->len_out = 0;
 227     c->resultsets = 0;
 228
 229     c->options = ZOOM_options_create_with_parent(options);
 230
 231     c->host_port = 0;
 232     c->path = 0;
 233     c->proxy = 0;
 234
 235     c->charset = c->lang = 0;
 236
 237     c->cookie_out = 0;
 238     c->cookie_in = 0;
 239     c->client_IP = 0;
 240     c->tasks = 0;
 241
 242     c->odr_in = odr_createmem (ODR_DECODE);
 243     c->odr_out = odr_createmem (ODR_ENCODE);
 244
 245     c->async = 0;
 246     c->support_named_resultsets = 0;
 247     c->last_event = ZOOM_EVENT_NONE;
 248
 249     c->m_queue_front = 0;
 250     c->m_queue_back = 0;
 251     return c;
 252 }
 253
 254 /* set database names. Take local databases (if set); otherwise
 255    take databases given in ZURL (if set); otherwise use Default */
 256 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 257                                  int *num)
 258 {
 259     char **databaseNames;
 260     const char *c;
 261     int no = 2;
 262     const char *cp = ZOOM_options_get (options, "databaseName");
 263
 264     if (!cp || !*cp)
 265     {
 266         if (strncmp (con->host_port, "unix:", 5) == 0)
 267             cp = strchr (con->host_port+5, ':');
 268         else
 269             cp = strchr (con->host_port, '/');
 270         if (cp)
 271             cp++;
 272     }
 273     if (cp)
 274     {
 275         c = cp;
 276         while ((c = strchr(c, '+')))
 277         {
 278             c++;
 279             no++;
 280         }
 281     }
 282     else
 283         cp = "Default";
 284     databaseNames = (char**)
 285         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 286     no = 0;
 287     while (*cp)
 288     {
 289         c = strchr (cp, '+');
 290         if (!c)
 291             c = cp + strlen(cp);
 292         else if (c == cp)
 293         {
 294             cp++;
 295             continue;
 296         }
 297         /* cp ptr to first char of db name, c is char
 298            following db name */
 299         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 300         memcpy (databaseNames[no], cp, c-cp);
 301         databaseNames[no++][c-cp] = '\0';
 302         cp = c;
 303         if (*cp)
 304             cp++;
 305     }
 306     databaseNames[no] = NULL;
 307     *num = no;
 308     return databaseNames;
 309 }
 310
 311 ZOOM_API(ZOOM_connection)
 312 ZOOM_connection_new (const char *host, int portnum)
 313 {
 314     ZOOM_connection c = ZOOM_connection_create (0);
 315
 316     ZOOM_connection_connect (c, host, portnum);
 317     return c;
 318 }
 319
 320 ZOOM_API(void)
 321 ZOOM_connection_connect(ZOOM_connection c,
 322                         const char *host, int portnum)
 323 {
 324     const char *val;
 325     ZOOM_task task;
 326
 327     if (c->cs)
 328     {
 329         yaz_log (LOG_DEBUG, "reconnect");
 330         c->reconnect_ok = 1;
 331         return;
 332     }
 333     yaz_log(LOG_DEBUG, "connect");
 334     xfree (c->proxy);
 335     val = ZOOM_options_get (c->options, "proxy");
 336     if (val && *val)
 337         c->proxy = xstrdup (val);
 338     else
 339         c->proxy = 0;
 340
 341     xfree (c->charset);
 342     val = ZOOM_options_get (c->options, "charset");
 343     if (val && *val)
 344         c->charset = xstrdup (val);
 345     else
 346         c->charset = 0;
 347
 348     xfree (c->lang);
 349     val = ZOOM_options_get (c->options, "lang");
 350     if (val && *val)
 351         c->lang = xstrdup (val);
 352     else
 353         c->lang = 0;
 354
 355     xfree (c->host_port);
 356     if (portnum)
 357     {
 358         char hostn[128];
 359         sprintf (hostn, "%.80s:%d", host, portnum);
 360         c->host_port = xstrdup(hostn);
 361     }
 362     else
 363         c->host_port = xstrdup(host);
 364
 365     ZOOM_options_set(c->options, "host", c->host_port);
 366
 367     val = ZOOM_options_get (c->options, "cookie");
 368     if (val && *val)
 369         c->cookie_out = xstrdup (val);
 370
 371     val = ZOOM_options_get (c->options, "clientIP");
 372     if (val && *val)
 373         c->client_IP = xstrdup (val);
 374
 375     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 376
 377     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 378
 379     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 380
 381     if (!c->async)
 382     {
 383         while (ZOOM_event (1, &c))
 384             ;
 385     }
 386 }
 387
 388 ZOOM_API(ZOOM_query)
 389 ZOOM_query_create(void)
 390 {
 391     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 392
 393     s->refcount = 1;
 394     s->z_query = 0;
 395     s->sort_spec = 0;
 396     s->odr = odr_createmem (ODR_ENCODE);
 397     s->query_string = 0;
 398
 399     return s;
 400 }
 401
 402 ZOOM_API(void)
 403 ZOOM_query_destroy(ZOOM_query s)
 404 {
 405     if (!s)
 406         return;
 407
 408     (s->refcount)--;
 409     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 410     if (s->refcount == 0)
 411     {
 412         odr_destroy (s->odr);
 413         xfree (s);
 414     }
 415 }
 416
 417 ZOOM_API(int)
 418 ZOOM_query_prefix(ZOOM_query s, const char *str)
 419 {
 420     s->query_string = odr_strdup(s->odr, str);
 421     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 422     s->z_query->which = Z_Query_type_1;
 423     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 424     if (!s->z_query->u.type_1)
 425         return -1;
 426     return 0;
 427 }
 428
 429 ZOOM_API(int)
 430 ZOOM_query_cql(ZOOM_query s, const char *str)
 431 {
 432     Z_External *ext;
 433
 434     s->query_string = odr_strdup(s->odr, str);
 435
 436     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 437     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 438     ext->indirect_reference = 0;
 439     ext->descriptor = 0;
 440     ext->which = Z_External_CQL;
 441     ext->u.cql = s->query_string;
 442
 443     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 444     s->z_query->which = Z_Query_type_104;
 445     s->z_query->u.type_104 =  ext;
 446
 447     return 0;
 448 }
 449
 450 ZOOM_API(int)
 451 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 452 {
 453     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 454     if (!s->sort_spec)
 455         return -1;
 456     return 0;
 457 }
 458
 459 static zoom_ret do_write(ZOOM_connection c);
 460
 461 ZOOM_API(void)
 462 ZOOM_connection_destroy(ZOOM_connection c)
 463 {
 464     ZOOM_resultset r;
 465     if (!c)
 466         return;
 467     if (c->cs)
 468         cs_close (c->cs);
 469     for (r = c->resultsets; r; r = r->next)
 470         r->connection = 0;
 471
 472     xfree (c->buf_in);
 473     xfree (c->addinfo);
 474     odr_destroy (c->odr_in);
 475     odr_destroy (c->odr_out);
 476     ZOOM_options_destroy (c->options);
 477     ZOOM_connection_remove_tasks (c);
 478     xfree (c->host_port);
 479     xfree (c->path);
 480     xfree (c->proxy);
 481     xfree (c->charset);
 482     xfree (c->lang);
 483     xfree (c->cookie_out);
 484     xfree (c->cookie_in);
 485     xfree (c->client_IP);
 486     xfree (c);
 487 }
 488
 489 void ZOOM_resultset_addref (ZOOM_resultset r)
 490 {
 491     if (r)
 492     {
 493         (r->refcount)++;
 494         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 495                  r, r->refcount);
 496     }
 497 }
 498 ZOOM_resultset ZOOM_resultset_create ()
 499 {
 500     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 501
 502     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 503     r->refcount = 1;
 504     r->size = 0;
 505     r->odr = odr_createmem (ODR_ENCODE);
 506     r->start = 0;
 507     r->piggyback = 1;
 508     r->setname = 0;
 509     r->schema = 0;
 510     r->count = 0;
 511     r->record_cache = 0;
 512     r->r_sort_spec = 0;
 513     r->query = 0;
 514     r->connection = 0;
 515     r->next = 0;
 516     return r;
 517 }
 518
 519 ZOOM_API(ZOOM_resultset)
 520 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 521 {
 522     ZOOM_resultset r;
 523     ZOOM_query s = ZOOM_query_create();
 524
 525     ZOOM_query_prefix (s, q);
 526
 527     r = ZOOM_connection_search (c, s);
 528     ZOOM_query_destroy (s);
 529     return r;
 530 }
 531
 532 ZOOM_API(ZOOM_resultset)
 533 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 534 {
 535     ZOOM_resultset r = ZOOM_resultset_create ();
 536     ZOOM_task task;
 537     const char *cp;
 538
 539     r->r_sort_spec = q->sort_spec;
 540     r->query = q;
 541
 542     r->options = ZOOM_options_create_with_parent(c->options);
 543
 544     r->start = ZOOM_options_get_int(r->options, "start", 0);
 545     r->count = ZOOM_options_get_int(r->options, "count", 0);
 546     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 547     cp = ZOOM_options_get (r->options, "setname");
 548     if (cp)
 549         r->setname = xstrdup(cp);
 550     cp = ZOOM_options_get (r->options, "schema");
 551     if (cp)
 552         r->schema = xstrdup(cp);
 553
 554     r->connection = c;
 555
 556     r->next = c->resultsets;
 557     c->resultsets = r;
 558
 559     if (c->host_port && c->proto == PROTO_HTTP)
 560     {
 561         if (!c->cs)
 562         {
 563             yaz_log(LOG_DEBUG, "NO COMSTACK");
 564             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 565         }
 566         else
 567         {
 568             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 569             c->reconnect_ok = 1;
 570         }
 571     }
 572
 573     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 574     task->u.search.resultset = r;
 575     ZOOM_resultset_addref (r);
 576
 577     (q->refcount)++;
 578
 579     if (!c->async)
 580     {
 581         while (ZOOM_event (1, &c))
 582             ;
 583     }
 584     return r;
 585 }
 586
 587 ZOOM_API(void)
 588 ZOOM_resultset_destroy(ZOOM_resultset r)
 589 {
 590     if (!r)
 591         return;
 592     (r->refcount)--;
 593     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 594              r, r->refcount);
 595     if (r->refcount == 0)
 596     {
 597         ZOOM_record_cache rc;
 598
 599         for (rc = r->record_cache; rc; rc = rc->next)
 600             if (rc->rec.wrbuf_marc)
 601                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 602         if (r->connection)
 603         {
 604             /* remove ourselves from the resultsets in connection */
 605             ZOOM_resultset *rp = &r->connection->resultsets;
 606             while (1)
 607             {
 608                 assert (*rp);   /* we must be in this list!! */
 609                 if (*rp == r)
 610                 {   /* OK, we're here - take us out of it */
 611                     *rp = (*rp)->next;
 612                     break;
 613                 }
 614                 rp = &(*rp)->next;
 615             }
 616         }
 617         ZOOM_query_destroy (r->query);
 618         ZOOM_options_destroy (r->options);
 619         odr_destroy (r->odr);
 620         xfree (r->setname);
 621         xfree (r->schema);
 622         xfree (r);
 623     }
 624 }
 625
 626 ZOOM_API(size_t)
 627 ZOOM_resultset_size (ZOOM_resultset r)
 628 {
 629     return r->size;
 630 }
 631
 632 static void do_close (ZOOM_connection c)
 633 {
 634     if (c->cs)
 635         cs_close(c->cs);
 636     c->cs = 0;
 637     c->mask = 0;
 638     c->state = STATE_IDLE;
 639 }
 640
 641 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 642                                      int force_sync, int start, int count)
 643 {
 644     ZOOM_task task;
 645     ZOOM_connection c;
 646     const char *cp;
 647
 648     if (!r)
 649         return;
 650     c = r->connection;
 651     if (!c)
 652         return;
 653
 654     if (c->host_port && c->proto == PROTO_HTTP)
 655     {
 656         if (!c->cs)
 657         {
 658             yaz_log(LOG_DEBUG, "NO COMSTACK");
 659             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 660         }
 661         else
 662         {
 663             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 664             c->reconnect_ok = 1;
 665         }
 666     }
 667     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 668     task->u.retrieve.resultset = r;
 669     task->u.retrieve.start = start;
 670     task->u.retrieve.count = count;
 671
 672     cp = ZOOM_options_get (r->options, "schema");
 673     if (cp)
 674     {
 675         if (!r->schema || strcmp(r->schema, cp))
 676         {
 677             xfree(r->schema);
 678             r->schema = xstrdup(cp);
 679         }
 680     }
 681
 682     ZOOM_resultset_addref (r);
 683
 684     if (!r->connection->async || force_sync)
 685         while (r->connection && ZOOM_event (1, &r->connection))
 686             ;
 687 }
 688
 689 ZOOM_API(void)
 690 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 691                         size_t start, size_t count)
 692 {
 693     int force_present = 0;
 694
 695     if (!r)
 696         return ;
 697     if (count && recs)
 698         force_present = 1;
 699     ZOOM_resultset_retrieve (r, force_present, start, count);
 700     if (force_present)
 701     {
 702         size_t i;
 703         for (i = 0; i< count; i++)
 704             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 705     }
 706 }
 707
 708 static zoom_ret do_connect (ZOOM_connection c)
 709 {
 710     void *add;
 711     const char *effective_host;
 712
 713     if (c->proxy)
 714         effective_host = c->proxy;
 715     else
 716         effective_host = c->host_port;
 717
 718     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 719
 720     assert (!c->cs);
 721     c->cs = cs_create_host (effective_host, 0, &add);
 722
 723     if (c->cs && c->cs->protocol == PROTO_HTTP)
 724     {
 725 #if HAVE_XML2
 726         const char *path = 0;
 727
 728         c->proto = PROTO_HTTP;
 729         cs_get_host_args(c->host_port, &path);
 730         xfree(c->path);
 731         c->path = xmalloc(strlen(path)+2);
 732         c->path[0] = '/';
 733         strcpy (c->path+1, path);
 734 #else
 735         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 736         do_close(c);
 737         return zoom_complete;
 738 #endif
 739     }
 740     if (c->cs)
 741     {
 742         int ret = cs_connect (c->cs, add);
 743         if (ret == 0)
 744         {
 745             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 746             ZOOM_connection_put_event(c, event);
 747             if (c->proto == PROTO_Z3950)
 748                 ZOOM_connection_send_init(c);
 749             else
 750             {
 751                 /* no init request for SRW .. */
 752                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 753                 ZOOM_connection_remove_task (c);
 754                 c->mask = 0;
 755                 ZOOM_connection_exec_task (c);
 756             }
 757             c->state = STATE_ESTABLISHED;
 758             return zoom_pending;
 759         }
 760         else if (ret > 0)
 761         {
 762             c->state = STATE_CONNECTING;
 763             c->mask = ZOOM_SELECT_EXCEPT;
 764             if (c->cs->io_pending & CS_WANT_WRITE)
 765                 c->mask += ZOOM_SELECT_WRITE;
 766             if (c->cs->io_pending & CS_WANT_READ)
 767                 c->mask += ZOOM_SELECT_READ;
 768             return zoom_pending;
 769         }
 770     }
 771     c->state = STATE_IDLE;
 772     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 773     return zoom_complete;
 774 }
 775
 776 int z3950_connection_socket(ZOOM_connection c)
 777 {
 778     if (c->cs)
 779         return cs_fileno(c->cs);
 780     return -1;
 781 }
 782
 783 int z3950_connection_mask(ZOOM_connection c)
 784 {
 785     if (c->cs)
 786         return c->mask;
 787     return 0;
 788 }
 789
 790 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 791 {
 792     int i;
 793     for (i = 0; i<200; i++)
 794     {
 795         size_t len;
 796         Z_OtherInformation **oi;
 797         char buf[80];
 798         const char *val;
 799         const char *cp;
 800         int oidval;
 801
 802         sprintf (buf, "otherInfo%d", i);
 803         val = ZOOM_options_get (c->options, buf);
 804         if (!val)
 805             break;
 806         cp = strchr (val, ':');
 807         if (!cp)
 808             continue;
 809         len = cp - val;
 810         if (len >= sizeof(buf))
 811             len = sizeof(buf)-1;
 812         memcpy (buf, val, len);
 813         buf[len] = '\0';
 814         oidval = oid_getvalbyname (buf);
 815         if (oidval == VAL_NONE)
 816             continue;
 817
 818         yaz_oi_APDU(a, &oi);
 819         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 820     }
 821 }
 822
 823 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 824 {
 825     assert (a);
 826     if (c->cookie_out)
 827     {
 828         Z_OtherInformation **oi;
 829         yaz_oi_APDU(a, &oi);
 830         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 831     }
 832     if (c->client_IP)
 833     {
 834         Z_OtherInformation **oi;
 835         yaz_oi_APDU(a, &oi);
 836         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 837     }
 838     otherInfo_attach (c, a, out);
 839     if (!z_APDU(out, &a, 0, 0))
 840     {
 841         FILE *outf = fopen("/tmp/apdu.txt", "a");
 842         if (a && outf)
 843         {
 844             ODR odr_pr = odr_createmem(ODR_PRINT);
 845             fprintf (outf, "a=%p\n", a);
 846             odr_setprint(odr_pr, outf);
 847             z_APDU(odr_pr, &a, 0, 0);
 848             odr_destroy(odr_pr);
 849         }
 850         yaz_log (LOG_DEBUG, "encoding failed");
 851         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 852         odr_reset(out);
 853         return -1;
 854     }
 855
 856     return 0;
 857 }
 858
 859 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 860 {
 861     ZOOM_Event event;
 862     assert (a);
 863     if (encode_APDU(c, a, c->odr_out))
 864         return zoom_complete;
 865     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 866     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 867     ZOOM_connection_put_event (c, event);
 868     odr_reset(c->odr_out);
 869     return do_write (c);
 870 }
 871
 872 /* returns 1 if PDU was sent OK (still pending )
 873            0 if PDU was not sent OK (nothing to wait for)
 874 */
 875
 876 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 877 {
 878     const char *impname;
 879     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 880     Z_InitRequest *ireq = apdu->u.initRequest;
 881     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 882         odr_malloc(c->odr_out, sizeof(*auth));
 883     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 884     const char *auth_userId = ZOOM_options_get (c->options, "user");
 885     const char *auth_password = ZOOM_options_get (c->options, "pass");
 886
 887     ODR_MASK_SET(ireq->options, Z_Options_search);
 888     ODR_MASK_SET(ireq->options, Z_Options_present);
 889     ODR_MASK_SET(ireq->options, Z_Options_scan);
 890     ODR_MASK_SET(ireq->options, Z_Options_sort);
 891     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 892     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 893
 894     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 895     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 896     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 897
 898     impname = ZOOM_options_get (c->options, "implementationName");
 899     ireq->implementationName =
 900         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 901     strcpy (ireq->implementationName, "");
 902     if (impname)
 903     {
 904         strcat (ireq->implementationName, impname);
 905         strcat (ireq->implementationName, "/");
 906     }
 907     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 908
 909     *ireq->maximumRecordSize =
 910         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 911     *ireq->preferredMessageSize =
 912         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 913
 914     if (auth_groupId || auth_password)
 915     {
 916         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 917         int i = 0;
 918         pass->groupId = 0;
 919         if (auth_groupId && *auth_groupId)
 920         {
 921             pass->groupId = (char *)
 922                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 923             strcpy(pass->groupId, auth_groupId);
 924             i++;
 925         }
 926         pass->userId = 0;
 927         if (auth_userId && *auth_userId)
 928         {
 929             pass->userId = (char *)
 930                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 931             strcpy(pass->userId, auth_userId);
 932             i++;
 933         }
 934         pass->password = 0;
 935         if (auth_password && *auth_password)
 936         {
 937             pass->password = (char *)
 938                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 939             strcpy(pass->password, auth_password);
 940             i++;
 941         }
 942         if (i)
 943         {
 944             auth->which = Z_IdAuthentication_idPass;
 945             auth->u.idPass = pass;
 946             ireq->idAuthentication = auth;
 947         }
 948     }
 949     else if (auth_userId)
 950     {
 951         auth->which = Z_IdAuthentication_open;
 952         auth->u.open = (char *)
 953             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 954         strcpy(auth->u.open, auth_userId);
 955         ireq->idAuthentication = auth;
 956     }
 957     if (c->proxy)
 958         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 959                                  VAL_PROXY, 1, c->host_port);
 960     if (c->charset||c->lang)
 961     {
 962         Z_OtherInformation **oi;
 963         Z_OtherInformationUnit *oi_unit;
 964
 965         yaz_oi_APDU(apdu, &oi);
 966
 967         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 968         {
 969             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 970
 971             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 972             oi_unit->information.externallyDefinedInfo =
 973                 yaz_set_proposal_charneg
 974                 (c->odr_out,
 975                  (const char **)&c->charset, (c->charset) ? 1:0,
 976                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 977         }
 978     }
 979     assert (apdu);
 980     return send_APDU (c, apdu);
 981 }
 982
 983 #if HAVE_XML2
 984 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
 985 {
 986     char ctype[50];
 987     Z_SOAP_Handler h[2] = {
 988         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 989         {0, 0, 0}
 990     };
 991     ODR o = odr_createmem(ODR_ENCODE);
 992     int ret;
 993     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 994     Z_GDU *gdu;
 995     ZOOM_Event event;
 996
 997     gdu = z_get_HTTP_Request(c->odr_out);
 998     gdu->u.HTTP_Request->path = c->path;
 999
1000     if (c->host_port)
1001     {
1002         const char *cp0 = strstr(c->host_port, "://");
1003         const char *cp1 = 0;
1004         if (cp0)
1005             cp0 = cp0+3;
1006         else
1007             cp0 = c->host_port;
1008
1009         cp1 = strchr(cp0, '/');
1010         if (!cp1)
1011             cp1 = cp0+strlen(cp0);
1012
1013         if (cp0 && cp1)
1014         {
1015             char *h = odr_malloc(c->odr_out, cp1 - cp0 + 1);
1016             memcpy (h, cp0, cp1 - cp0);
1017             h[cp1-cp0] = '\0';
1018             z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1019                               "host", h);
1020         }
1021     }
1022
1023     strcpy(ctype, "text/xml");
1024     if (c->charset && strlen(c->charset) < 20)
1025     {
1026         strcat(ctype, "; charset=");
1027         strcat(ctype, c->charset);
1028     }
1029     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1030                       "Content-Type", ctype);
1031     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1032                       "SOAPAction", "\"\"");
1033     p->which = Z_SOAP_generic;
1034     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1035     p->u.generic->no = 0;
1036     p->u.generic->ns = 0;
1037     p->u.generic->p = sr;
1038     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1039
1040     ret = z_soap_codec_enc(o, &p,
1041                            &gdu->u.HTTP_Request->content_buf,
1042                            &gdu->u.HTTP_Request->content_len, h,
1043                            c->charset);
1044
1045     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1046         return zoom_complete;
1047     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1048
1049     odr_destroy(o);
1050
1051     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1052     ZOOM_connection_put_event (c, event);
1053     odr_reset(c->odr_out);
1054     return do_write (c);
1055 }
1056 #endif
1057
1058 #if HAVE_XML2
1059 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1060 {
1061     int i;
1062     ZOOM_resultset resultset = 0;
1063     Z_SRW_PDU *sr = 0;
1064     const char *recordPacking = 0;
1065
1066     if (c->error)                  /* don't continue on error */
1067         return zoom_complete;
1068     assert (c->tasks);
1069     if (c->tasks->which == ZOOM_TASK_SEARCH)
1070     {
1071         resultset = c->tasks->u.search.resultset;
1072         resultset->setname = xstrdup ("default");
1073         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1074     }
1075     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1076     {
1077         resultset = c->tasks->u.retrieve.resultset;
1078
1079         resultset->start = c->tasks->u.retrieve.start;
1080         resultset->count = c->tasks->u.retrieve.count;
1081
1082         if (resultset->start >= resultset->size)
1083             return zoom_complete;
1084         if (resultset->start + resultset->count > resultset->size)
1085             resultset->count = resultset->size - resultset->start;
1086
1087         for (i = 0; i<resultset->count; i++)
1088         {
1089             ZOOM_record rec =
1090                 record_cache_lookup (resultset, i + resultset->start);
1091             if (!rec)
1092                 break;
1093         }
1094         if (i == resultset->count)
1095             return zoom_complete;
1096     }
1097     assert(resultset->query);
1098
1099     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1100
1101     if (resultset->query->z_query->which == Z_Query_type_104
1102         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1103     {
1104
1105         sr->u.request->query_type = Z_SRW_query_type_cql;
1106         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1107     }
1108     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1109              resultset->query->z_query->u.type_1)
1110     {
1111         sr->u.request->query_type = Z_SRW_query_type_pqf;
1112         sr->u.request->query.pqf = resultset->query->query_string;
1113     }
1114     else
1115     {
1116         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1117         return zoom_complete;
1118     }
1119     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1120     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1121     sr->u.request->recordSchema = resultset->schema;
1122
1123     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1124
1125     if (recordPacking)
1126         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1127
1128     return send_srw(c, sr);
1129 }
1130 #else
1131 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1132 {
1133     return zoom_complete;
1134 }
1135 #endif
1136
1137 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1138 {
1139     ZOOM_resultset r;
1140     int lslb, ssub, mspn;
1141     const char *syntax;
1142     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1143     Z_SearchRequest *search_req = apdu->u.searchRequest;
1144     const char *elementSetName;
1145     const char *smallSetElementSetName;
1146     const char *mediumSetElementSetName;
1147
1148     assert (c->tasks);
1149     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1150
1151     r = c->tasks->u.search.resultset;
1152
1153     elementSetName =
1154         ZOOM_options_get (r->options, "elementSetName");
1155     smallSetElementSetName  =
1156         ZOOM_options_get (r->options, "smallSetElementSetName");
1157     mediumSetElementSetName =
1158         ZOOM_options_get (r->options, "mediumSetElementSetName");
1159
1160     if (!smallSetElementSetName)
1161         smallSetElementSetName = elementSetName;
1162
1163     if (!mediumSetElementSetName)
1164         mediumSetElementSetName = elementSetName;
1165
1166     assert (r);
1167     assert (r->query);
1168
1169     /* prepare query for the search request */
1170     search_req->query = r->query->z_query;
1171
1172     search_req->databaseNames =
1173         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1174
1175     /* get syntax (no need to provide unless piggyback is in effect) */
1176     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1177
1178     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1179     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1180     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1181     if (lslb != -1 && ssub != -1 && mspn != -1)
1182     {
1183         /* So're a Z39.50 expert? Let's hope you don't do sort */
1184         *search_req->largeSetLowerBound = lslb;
1185         *search_req->smallSetUpperBound = ssub;
1186         *search_req->mediumSetPresentNumber = mspn;
1187     }
1188     else if (r->start == 0 && r->count > 0
1189              && r->piggyback && !r->r_sort_spec && !r->schema)
1190     {
1191         /* Regular piggyback - do it unless we're going to do sort */
1192         *search_req->largeSetLowerBound = 2000000000;
1193         *search_req->smallSetUpperBound = 0;
1194         *search_req->mediumSetPresentNumber = r->count;
1195         smallSetElementSetName = 0;
1196     }
1197     else
1198     {
1199         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1200         smallSetElementSetName = 0;
1201         mediumSetElementSetName = 0;
1202         syntax = 0;
1203     }
1204     if (smallSetElementSetName && *smallSetElementSetName)
1205     {
1206         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1207             odr_malloc (c->odr_out, sizeof(*esn));
1208
1209         esn->which = Z_ElementSetNames_generic;
1210         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1211         search_req->smallSetElementSetNames = esn;
1212     }
1213     if (mediumSetElementSetName && *mediumSetElementSetName)
1214     {
1215         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1216             odr_malloc (c->odr_out, sizeof(*esn));
1217
1218         esn->which = Z_ElementSetNames_generic;
1219         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1220         search_req->mediumSetElementSetNames = esn;
1221     }
1222     if (syntax)
1223         search_req->preferredRecordSyntax =
1224             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1225
1226     if (!r->setname)
1227     {
1228         if (c->support_named_resultsets)
1229         {
1230             char setname[14];
1231             int ord;
1232             /* find the lowest unused ordinal so that we re-use
1233                result sets on the server. */
1234             for (ord = 1; ; ord++)
1235             {
1236                 ZOOM_resultset rp;
1237                 sprintf (setname, "%d", ord);
1238                 for (rp = c->resultsets; rp; rp = rp->next)
1239                     if (rp->setname && !strcmp (rp->setname, setname))
1240                         break;
1241                 if (!rp)
1242                     break;
1243             }
1244             r->setname = xstrdup (setname);
1245             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1246         }
1247         else
1248             r->setname = xstrdup ("default");
1249         ZOOM_options_set (r->options, "setname", r->setname);
1250     }
1251     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1252     /* send search request */
1253     return send_APDU (c, apdu);
1254 }
1255
1256 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1257 {
1258     int oclass;
1259     Z_DefaultDiagFormat *r;
1260     char *addinfo = 0;
1261
1262     xfree (c->addinfo);
1263     c->addinfo = 0;
1264     if (p->which != Z_DiagRec_defaultFormat)
1265     {
1266         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1267         return;
1268     }
1269     r = p->u.defaultFormat;
1270     switch (r->which)
1271     {
1272     case Z_DefaultDiagFormat_v2Addinfo:
1273         addinfo = r->u.v2Addinfo;
1274         break;
1275     case Z_DefaultDiagFormat_v3Addinfo:
1276         addinfo = r->u.v3Addinfo;
1277         break;
1278     }
1279     set_dset_error(c, *r->condition,
1280                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1281                    addinfo, 0);
1282 }
1283
1284 ZOOM_API(ZOOM_record)
1285 ZOOM_record_clone (ZOOM_record srec)
1286 {
1287     char *buf;
1288     int size;
1289     ODR odr_enc;
1290     ZOOM_record nrec;
1291
1292     odr_enc = odr_createmem(ODR_ENCODE);
1293     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1294         return 0;
1295     buf = odr_getbuf (odr_enc, &size, 0);
1296
1297     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1298     nrec->odr = odr_createmem(ODR_DECODE);
1299     nrec->wrbuf_marc = 0;
1300     odr_setbuf (nrec->odr, buf, size, 0);
1301     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1302
1303     odr_destroy (odr_enc);
1304     return nrec;
1305 }
1306
1307 ZOOM_API(ZOOM_record)
1308 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1309 {
1310     return record_cache_lookup (s, pos);
1311 }
1312
1313 ZOOM_API(ZOOM_record)
1314 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1315 {
1316     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1317
1318     if (!rec)
1319     {
1320         ZOOM_resultset_retrieve (r, 1, pos, 1);
1321         rec = ZOOM_resultset_record_immediate (r, pos);
1322     }
1323     return rec;
1324 }
1325
1326 ZOOM_API(void)
1327 ZOOM_record_destroy (ZOOM_record rec)
1328 {
1329     if (!rec)
1330         return;
1331     if (rec->wrbuf_marc)
1332         wrbuf_free (rec->wrbuf_marc, 1);
1333     odr_destroy (rec->odr);
1334     xfree (rec);
1335 }
1336
1337 ZOOM_API(const char *)
1338 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1339 {
1340     Z_NamePlusRecord *npr;
1341
1342     if (len)
1343         *len = 0; /* default return */
1344
1345     if (!rec)
1346         return 0;
1347     npr = rec->npr;
1348     if (!npr)
1349         return 0;
1350     if (!strcmp (type, "database"))
1351     {
1352         if (len)
1353             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1354         return npr->databaseName;
1355     }
1356     else if (!strcmp (type, "syntax"))
1357     {
1358         const char *desc = 0;
1359         if (npr->which == Z_NamePlusRecord_databaseRecord)
1360         {
1361             Z_External *r = (Z_External *) npr->u.databaseRecord;
1362             oident *ent = oid_getentbyoid(r->direct_reference);
1363             if (ent)
1364                 desc = ent->desc;
1365         }
1366         if (!desc)
1367             desc = "none";
1368         if (len)
1369             *len = strlen(desc);
1370         return desc;
1371     }
1372     else if (!strcmp (type, "render") &&
1373              npr->which == Z_NamePlusRecord_databaseRecord)
1374     {
1375         Z_External *r = (Z_External *) npr->u.databaseRecord;
1376         oident *ent = oid_getentbyoid(r->direct_reference);
1377
1378         if (r->which == Z_External_sutrs)
1379         {
1380             if (len) *len = r->u.sutrs->len;
1381             return (const char *) r->u.sutrs->buf;
1382         }
1383         else if (r->which == Z_External_octet)
1384         {
1385             yaz_marc_t mt;
1386             switch (ent->value)
1387             {
1388             case VAL_SOIF:
1389             case VAL_HTML:
1390             case VAL_SUTRS:
1391                 break;
1392             case VAL_TEXT_XML:
1393             case VAL_APPLICATION_XML:
1394                 break;
1395             default:
1396                 if (!rec->wrbuf_marc)
1397                     rec->wrbuf_marc = wrbuf_alloc();
1398
1399                 mt = yaz_marc_create();
1400                 wrbuf_rewind (rec->wrbuf_marc);
1401                 if (yaz_marc_decode_wrbuf (
1402                         mt, (const char *) r->u.octet_aligned->buf,
1403                         r->u.octet_aligned->len,
1404                         rec->wrbuf_marc) > 0)
1405                 {
1406                     if (len)
1407                         *len = wrbuf_len(rec->wrbuf_marc);
1408                     yaz_marc_destroy(mt);
1409                     return wrbuf_buf(rec->wrbuf_marc);
1410                 }
1411                 yaz_marc_destroy(mt);
1412             }
1413             if (len)
1414                 *len = r->u.octet_aligned->len;
1415             return (const char *) r->u.octet_aligned->buf;
1416         }
1417         else if (r->which == Z_External_grs1)
1418         {
1419             if (!rec->wrbuf_marc)
1420                 rec->wrbuf_marc = wrbuf_alloc();
1421             wrbuf_rewind (rec->wrbuf_marc);
1422             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1423             if (len)
1424                 *len = wrbuf_len(rec->wrbuf_marc);
1425             return wrbuf_buf(rec->wrbuf_marc);
1426         }
1427         return 0;
1428     }
1429     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1430              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1431     {
1432         Z_External *r = (Z_External *) npr->u.databaseRecord;
1433         oident *ent = oid_getentbyoid(r->direct_reference);
1434
1435         if (r->which == Z_External_sutrs)
1436         {
1437             if (len) *len = r->u.sutrs->len;
1438             return (const char *) r->u.sutrs->buf;
1439         }
1440         else if (r->which == Z_External_octet)
1441         {
1442             yaz_marc_t mt;
1443             int marc_decode_type = YAZ_MARC_MARCXML;
1444
1445             if (!strcmp(type, "oai"))
1446                 marc_decode_type = YAZ_MARC_OAIMARC;
1447             switch (ent->value)
1448             {
1449             case VAL_SOIF:
1450             case VAL_HTML:
1451             case VAL_SUTRS:
1452                 break;
1453             case VAL_TEXT_XML:
1454             case VAL_APPLICATION_XML:
1455                 break;
1456             default:
1457                 if (!rec->wrbuf_marc)
1458                     rec->wrbuf_marc = wrbuf_alloc();
1459                 wrbuf_rewind (rec->wrbuf_marc);
1460                 mt = yaz_marc_create();
1461
1462                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1463                 if (yaz_marc_decode_wrbuf (
1464                         mt, (const char *) r->u.octet_aligned->buf,
1465                         r->u.octet_aligned->len,
1466                         rec->wrbuf_marc) > 0)
1467                 {
1468                     if (len)
1469                         *len = wrbuf_len(rec->wrbuf_marc);
1470                     yaz_marc_destroy(mt);
1471                     return wrbuf_buf(rec->wrbuf_marc);
1472                 }
1473                 yaz_marc_destroy(mt);
1474             }
1475             if (len) *len = r->u.octet_aligned->len;
1476             return (const char *) r->u.octet_aligned->buf;
1477         }
1478         else if (r->which == Z_External_grs1)
1479         {
1480             if (len) *len = 5;
1481             return "GRS-1";
1482         }
1483         else if (r->which == Z_External_OPAC)
1484         {
1485             if (len) *len = 4;
1486             return "OPAC";
1487         }
1488         return 0;
1489     }
1490     else if (!strcmp (type, "raw"))
1491     {
1492         if (npr->which == Z_NamePlusRecord_databaseRecord)
1493         {
1494             Z_External *r = (Z_External *) npr->u.databaseRecord;
1495
1496             if (r->which == Z_External_sutrs)
1497             {
1498                 if (len) *len = r->u.sutrs->len;
1499                 return (const char *) r->u.sutrs->buf;
1500             }
1501             else if (r->which == Z_External_octet)
1502             {
1503                 if (len) *len = r->u.octet_aligned->len;
1504                 return (const char *) r->u.octet_aligned->buf;
1505             }
1506             else /* grs-1, explain, ... */
1507             {
1508                 if (len) *len = -1;
1509                 return (const char *) npr->u.databaseRecord;
1510             }
1511         }
1512         return 0;
1513     }
1514     else if (!strcmp (type, "ext"))
1515     {
1516         if (npr->which == Z_NamePlusRecord_databaseRecord)
1517             return (const char *) npr->u.databaseRecord;
1518         return 0;
1519     }
1520     return 0;
1521 }
1522
1523 static int strcmp_null(const char *v1, const char *v2)
1524 {
1525     if (!v1 && !v2)
1526         return 0;
1527     if (!v1 || !v2)
1528         return -1;
1529     return strcmp(v1, v2);
1530 }
1531
1532 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1533                               int pos)
1534 {
1535     ZOOM_record_cache rc;
1536     const char *elementSetName =
1537         ZOOM_resultset_option_get (r, "elementSetName");
1538     const char *syntax =
1539         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1540
1541     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1542     ZOOM_connection_put_event(r->connection, event);
1543
1544     for (rc = r->record_cache; rc; rc = rc->next)
1545     {
1546         if (pos == rc->pos)
1547         {
1548             if (strcmp_null(r->schema, rc->schema))
1549                 continue;
1550             if (strcmp_null(elementSetName,rc->elementSetName))
1551                 continue;
1552             if (strcmp_null(syntax, rc->syntax))
1553                 continue;
1554             /* not destroying rc->npr (it's handled by nmem )*/
1555             rc->rec.npr = npr;
1556             /* keeping wrbuf_marc too */
1557             return;
1558         }
1559     }
1560     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1561     rc->rec.npr = npr;
1562     rc->rec.odr = 0;
1563     rc->rec.wrbuf_marc = 0;
1564     if (elementSetName)
1565         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1566     else
1567         rc->elementSetName = 0;
1568
1569     if (syntax)
1570         rc->syntax = odr_strdup (r->odr, syntax);
1571     else
1572         rc->syntax = 0;
1573
1574     if (r->schema)
1575         rc->schema = odr_strdup (r->odr, r->schema);
1576     else
1577         rc->schema = 0;
1578
1579     rc->pos = pos;
1580     rc->next = r->record_cache;
1581     r->record_cache = rc;
1582 }
1583
1584 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1585 {
1586     ZOOM_record_cache rc;
1587     const char *elementSetName =
1588         ZOOM_resultset_option_get (r, "elementSetName");
1589     const char *syntax =
1590         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1591
1592     for (rc = r->record_cache; rc; rc = rc->next)
1593     {
1594         if (pos == rc->pos)
1595         {
1596             if (strcmp_null(r->schema, rc->schema))
1597                 continue;
1598             if (strcmp_null(elementSetName,rc->elementSetName))
1599                 continue;
1600             if (strcmp_null(syntax, rc->syntax))
1601                 continue;
1602             return &rc->rec;
1603         }
1604     }
1605     return 0;
1606 }
1607
1608 static void handle_records (ZOOM_connection c, Z_Records *sr,
1609                             int present_phase)
1610 {
1611     ZOOM_resultset resultset;
1612
1613     if (!c->tasks)
1614         return ;
1615     switch (c->tasks->which)
1616     {
1617     case ZOOM_TASK_SEARCH:
1618         resultset = c->tasks->u.search.resultset;
1619         break;
1620     case ZOOM_TASK_RETRIEVE:
1621         resultset = c->tasks->u.retrieve.resultset;
1622         break;
1623     default:
1624         return;
1625     }
1626     if (sr && sr->which == Z_Records_NSD)
1627     {
1628         Z_DiagRec dr, *dr_p = &dr;
1629         dr.which = Z_DiagRec_defaultFormat;
1630         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1631
1632         response_diag (c, dr_p);
1633     }
1634     else if (sr && sr->which == Z_Records_multipleNSD)
1635     {
1636         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1637             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1638         else
1639             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1640     }
1641     else
1642     {
1643         if (resultset->count + resultset->start > resultset->size)
1644             resultset->count = resultset->size - resultset->start;
1645         if (resultset->count < 0)
1646             resultset->count = 0;
1647         if (sr && sr->which == Z_Records_DBOSD)
1648         {
1649             int i;
1650             NMEM nmem = odr_extract_mem (c->odr_in);
1651             Z_NamePlusRecordList *p =
1652                 sr->u.databaseOrSurDiagnostics;
1653             for (i = 0; i<p->num_records; i++)
1654             {
1655                 record_cache_add (resultset, p->records[i],
1656                                   i+ resultset->start);
1657             }
1658             /* transfer our response to search_nmem .. we need it later */
1659             nmem_transfer (resultset->odr->mem, nmem);
1660             nmem_destroy (nmem);
1661             if (present_phase && p->num_records == 0)
1662             {
1663                 /* present response and we didn't get any records! */
1664                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1665             }
1666         }
1667         else if (present_phase)
1668         {
1669             /* present response and we didn't get any records! */
1670             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1671         }
1672     }
1673 }
1674
1675 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1676 {
1677     handle_records (c, pr->records, 1);
1678 }
1679
1680 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1681 {
1682     ZOOM_resultset resultset;
1683     ZOOM_Event event;
1684
1685     yaz_log (LOG_DEBUG, "got search response");
1686
1687     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1688         return ;
1689
1690     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
1691     ZOOM_connection_put_event(c, event);
1692
1693     resultset = c->tasks->u.search.resultset;
1694
1695     resultset->size = *sr->resultCount;
1696     handle_records (c, sr->records, 0);
1697 }
1698
1699 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1700 {
1701     if (res->diagnostics && res->num_diagnostics > 0)
1702         response_diag (c, res->diagnostics[0]);
1703 }
1704
1705 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1706 {
1707     NMEM nmem = odr_extract_mem (c->odr_in);
1708     ZOOM_scanset scan;
1709
1710     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1711         return 0;
1712     scan = c->tasks->u.scan.scan;
1713
1714     if (res->entries && res->entries->nonsurrogateDiagnostics)
1715         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1716     scan->scan_response = res;
1717     nmem_transfer (scan->odr->mem, nmem);
1718     if (res->stepSize)
1719         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1720     if (res->positionOfTerm)
1721         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1722     if (res->scanStatus)
1723         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1724     if (res->numberOfEntriesReturned)
1725         ZOOM_options_set_int (scan->options, "number",
1726                               *res->numberOfEntriesReturned);
1727     nmem_destroy (nmem);
1728     return 1;
1729 }
1730
1731 static zoom_ret send_sort (ZOOM_connection c)
1732 {
1733     ZOOM_resultset  resultset;
1734
1735     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1736         return zoom_complete;
1737
1738     resultset = c->tasks->u.search.resultset;
1739
1740     if (c->error)
1741     {
1742         resultset->r_sort_spec = 0;
1743         return zoom_complete;
1744     }
1745     if (resultset->r_sort_spec)
1746     {
1747         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1748         Z_SortRequest *req = apdu->u.sortRequest;
1749
1750         req->num_inputResultSetNames = 1;
1751         req->inputResultSetNames = (Z_InternationalString **)
1752             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1753         req->inputResultSetNames[0] =
1754             odr_strdup (c->odr_out, resultset->setname);
1755         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1756         req->sortSequence = resultset->r_sort_spec;
1757         resultset->r_sort_spec = 0;
1758         return send_APDU (c, apdu);
1759     }
1760     return zoom_complete;
1761 }
1762
1763 static zoom_ret send_present (ZOOM_connection c)
1764 {
1765     Z_APDU *apdu = 0;
1766     Z_PresentRequest *req = 0;
1767     int i = 0;
1768     const char *syntax = 0;
1769     const char *elementSetName = 0;
1770     ZOOM_resultset  resultset;
1771
1772     if (!c->tasks)
1773         return zoom_complete;
1774
1775     switch (c->tasks->which)
1776     {
1777     case ZOOM_TASK_SEARCH:
1778         resultset = c->tasks->u.search.resultset;
1779         break;
1780     case ZOOM_TASK_RETRIEVE:
1781         resultset = c->tasks->u.retrieve.resultset;
1782         resultset->start = c->tasks->u.retrieve.start;
1783         resultset->count = c->tasks->u.retrieve.count;
1784
1785         if (resultset->start >= resultset->size)
1786             return zoom_complete;
1787         if (resultset->start + resultset->count > resultset->size)
1788             resultset->count = resultset->size - resultset->start;
1789         break;
1790     default:
1791         return zoom_complete;
1792     }
1793
1794     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1795     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1796
1797     if (c->error)                  /* don't continue on error */
1798         return zoom_complete;
1799     if (resultset->start < 0)
1800         return zoom_complete;
1801     for (i = 0; i<resultset->count; i++)
1802     {
1803         ZOOM_record rec =
1804             record_cache_lookup (resultset, i + resultset->start);
1805         if (!rec)
1806             break;
1807     }
1808     if (i == resultset->count)
1809         return zoom_complete;
1810
1811     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1812     req = apdu->u.presentRequest;
1813
1814     resultset->start += i;
1815     resultset->count -= i;
1816     *req->resultSetStartPoint = resultset->start + 1;
1817     *req->numberOfRecordsRequested = resultset->count;
1818     assert (*req->numberOfRecordsRequested > 0);
1819
1820     if (syntax && *syntax)
1821         req->preferredRecordSyntax =
1822             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1823
1824     if (resultset->schema && *resultset->schema)
1825     {
1826         Z_RecordComposition *compo = (Z_RecordComposition *)
1827             odr_malloc (c->odr_out, sizeof(*compo));
1828
1829         req->recordComposition = compo;
1830         compo->which = Z_RecordComp_complex;
1831         compo->u.complex = (Z_CompSpec *)
1832             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1833         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1834             odr_malloc(c->odr_out, sizeof(bool_t));
1835         *compo->u.complex->selectAlternativeSyntax = 0;
1836
1837         compo->u.complex->generic = (Z_Specification *)
1838             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1839
1840         compo->u.complex->generic->which = Z_Schema_oid;
1841         compo->u.complex->generic->schema.oid = (Odr_oid *)
1842             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1843
1844         if (!compo->u.complex->generic->schema.oid)
1845         {
1846             /* OID wasn't a schema! Try record syntax instead. */
1847
1848             compo->u.complex->generic->schema.oid = (Odr_oid *)
1849                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1850         }
1851         if (elementSetName && *elementSetName)
1852         {
1853             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1854                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1855             compo->u.complex->generic->elementSpec->which =
1856                 Z_ElementSpec_elementSetName;
1857             compo->u.complex->generic->elementSpec->u.elementSetName =
1858                 odr_strdup (c->odr_out, elementSetName);
1859         }
1860         else
1861             compo->u.complex->generic->elementSpec = 0;
1862         compo->u.complex->num_dbSpecific = 0;
1863         compo->u.complex->dbSpecific = 0;
1864         compo->u.complex->num_recordSyntax = 0;
1865         compo->u.complex->recordSyntax = 0;
1866     }
1867     else if (elementSetName && *elementSetName)
1868     {
1869         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1870             odr_malloc (c->odr_out, sizeof(*esn));
1871         Z_RecordComposition *compo = (Z_RecordComposition *)
1872             odr_malloc (c->odr_out, sizeof(*compo));
1873
1874         esn->which = Z_ElementSetNames_generic;
1875         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1876         compo->which = Z_RecordComp_simple;
1877         compo->u.simple = esn;
1878         req->recordComposition = compo;
1879     }
1880     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1881     return send_APDU (c, apdu);
1882 }
1883
1884 ZOOM_API(ZOOM_scanset)
1885 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1886 {
1887     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1888
1889     scan->connection = c;
1890     scan->odr = odr_createmem (ODR_DECODE);
1891     scan->options = ZOOM_options_create_with_parent (c->options);
1892     scan->refcount = 1;
1893     scan->scan_response = 0;
1894
1895     if ((scan->termListAndStartPoint =
1896          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1897                       start)))
1898     {
1899         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1900         task->u.scan.scan = scan;
1901
1902         (scan->refcount)++;
1903         if (!c->async)
1904         {
1905             while (ZOOM_event (1, &c))
1906                 ;
1907         }
1908     }
1909     return scan;
1910 }
1911
1912 ZOOM_API(void)
1913 ZOOM_scanset_destroy (ZOOM_scanset scan)
1914 {
1915     if (!scan)
1916         return;
1917     (scan->refcount)--;
1918     if (scan->refcount == 0)
1919     {
1920         odr_destroy (scan->odr);
1921
1922         ZOOM_options_destroy (scan->options);
1923         xfree (scan);
1924     }
1925 }
1926
1927 static zoom_ret send_package (ZOOM_connection c)
1928 {
1929     ZOOM_Event event;
1930     if (!c->tasks)
1931         return zoom_complete;
1932     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1933
1934     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1935     ZOOM_connection_put_event (c, event);
1936
1937     return do_write_ex (c, c->tasks->u.package->buf_out,
1938                         c->tasks->u.package->len_out);
1939 }
1940
1941 static zoom_ret send_scan (ZOOM_connection c)
1942 {
1943     ZOOM_scanset scan;
1944     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1945     Z_ScanRequest *req = apdu->u.scanRequest;
1946     if (!c->tasks)
1947         return zoom_complete;
1948     assert (c->tasks->which == ZOOM_TASK_SCAN);
1949     scan = c->tasks->u.scan.scan;
1950
1951     req->termListAndStartPoint = scan->termListAndStartPoint;
1952     req->attributeSet = scan->attributeSet;
1953
1954     *req->numberOfTermsRequested =
1955         ZOOM_options_get_int(scan->options, "number", 10);
1956
1957     req->preferredPositionInResponse =
1958         odr_intdup (c->odr_out,
1959                     ZOOM_options_get_int(scan->options, "position", 1));
1960
1961     req->stepSize =
1962         odr_intdup (c->odr_out,
1963                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1964
1965     req->databaseNames = set_DatabaseNames (c, scan->options,
1966                                             &req->num_databaseNames);
1967
1968     return send_APDU (c, apdu);
1969 }
1970
1971 ZOOM_API(size_t)
1972 ZOOM_scanset_size (ZOOM_scanset scan)
1973 {
1974     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1975         return 0;
1976     return scan->scan_response->entries->num_entries;
1977 }
1978
1979 ZOOM_API(const char *)
1980 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1981                                int *occ, int *len)
1982 {
1983     const char *term = 0;
1984     size_t noent = ZOOM_scanset_size (scan);
1985     Z_ScanResponse *res = scan->scan_response;
1986
1987     *len = 0;
1988     *occ = 0;
1989     if (pos >= noent)
1990         return 0;
1991     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1992     {
1993         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1994
1995         if (t->term->which == Z_Term_general)
1996         {
1997             term = (const char *) t->term->u.general->buf;
1998             *len = t->term->u.general->len;
1999         }
2000         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2001     }
2002     return term;
2003 }
2004
2005 ZOOM_API(const char *)
2006 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2007 {
2008     return ZOOM_options_get (scan->options, key);
2009 }
2010
2011 ZOOM_API(void)
2012 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2013                               const char *val)
2014 {
2015     ZOOM_options_set (scan->options, key, val);
2016 }
2017
2018 static Z_APDU *create_es_package (ZOOM_package p, int type)
2019 {
2020     const char *str;
2021     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2022     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2023
2024     *req->function = Z_ExtendedServicesRequest_create;
2025
2026     str = ZOOM_options_get(p->options, "package-name");
2027     if (str && *str)
2028         req->packageName = nmem_strdup (p->odr_out->mem, str);
2029
2030     str = ZOOM_options_get(p->options, "user-id");
2031     if (str)
2032         req->userId = nmem_strdup (p->odr_out->mem, str);
2033
2034     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2035                                               type);
2036
2037     str = ZOOM_options_get(p->options, "function");
2038     if (str)
2039     {
2040         if (!strcmp (str, "create"))
2041             *req->function = 1;
2042         if (!strcmp (str, "delete"))
2043             *req->function = 2;
2044         if (!strcmp (str, "modify"))
2045             *req->function = 3;
2046     }
2047     return apdu;
2048 }
2049
2050 static const char *ill_array_lookup (void *clientData, const char *idx)
2051 {
2052     ZOOM_package p = (ZOOM_package) clientData;
2053     return ZOOM_options_get (p->options, idx+4);
2054 }
2055
2056 static Z_External *encode_ill_request (ZOOM_package p)
2057 {
2058     ODR out = p->odr_out;
2059     ILL_Request *req;
2060     Z_External *r = 0;
2061     struct ill_get_ctl ctl;
2062
2063     ctl.odr = p->odr_out;
2064     ctl.clientData = p;
2065     ctl.f = ill_array_lookup;
2066
2067     req = ill_get_ILLRequest(&ctl, "ill", 0);
2068
2069     if (!ill_Request (out, &req, 0, 0))
2070     {
2071         int ill_request_size;
2072         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2073         if (ill_request_buf)
2074             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2075         return 0;
2076     }
2077     else
2078     {
2079         oident oid;
2080         int illRequest_size = 0;
2081         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2082
2083         oid.proto = PROTO_GENERAL;
2084         oid.oclass = CLASS_GENERAL;
2085         oid.value = VAL_ISO_ILL_1;
2086
2087         r = (Z_External *) odr_malloc (out, sizeof(*r));
2088         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2089         r->indirect_reference = 0;
2090         r->descriptor = 0;
2091         r->which = Z_External_single;
2092
2093         r->u.single_ASN1_type = (Odr_oct *)
2094             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2095         r->u.single_ASN1_type->buf = (unsigned char*)
2096             odr_malloc (out, illRequest_size);
2097         r->u.single_ASN1_type->len = illRequest_size;
2098         r->u.single_ASN1_type->size = illRequest_size;
2099         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2100     }
2101     return r;
2102 }
2103
2104 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2105 {
2106     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2107     const char *str;
2108
2109     req->which=Z_IOItemOrder_esRequest;
2110     req->u.esRequest = (Z_IORequest *)
2111         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2112
2113     /* to keep part ... */
2114     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2115         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2116     req->u.esRequest->toKeep->supplDescription = 0;
2117     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2118         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2119
2120     str = ZOOM_options_get(p->options, "contact-name");
2121     req->u.esRequest->toKeep->contact->name = str ?
2122         nmem_strdup (p->odr_out->mem, str) : 0;
2123
2124     str = ZOOM_options_get(p->options, "contact-phone");
2125     req->u.esRequest->toKeep->contact->phone = str ?
2126         nmem_strdup (p->odr_out->mem, str) : 0;
2127
2128     str = ZOOM_options_get(p->options, "contact-email");
2129     req->u.esRequest->toKeep->contact->email = str ?
2130         nmem_strdup (p->odr_out->mem, str) : 0;
2131
2132     req->u.esRequest->toKeep->addlBilling = 0;
2133
2134     /* not to keep part ... */
2135     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2136         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2137
2138     str = ZOOM_options_get(p->options, "itemorder-setname");
2139     if (!str)
2140         str = "default";
2141
2142     if (!*str)
2143         req->u.esRequest->notToKeep->resultSetItem = 0;
2144     else
2145     {
2146         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2147            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2148
2149         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2150            nmem_strdup (p->odr_out->mem, str);
2151         req->u.esRequest->notToKeep->resultSetItem->item =
2152             (int *) odr_malloc(p->odr_out, sizeof(int));
2153
2154         str = ZOOM_options_get(p->options, "itemorder-item");
2155         *req->u.esRequest->notToKeep->resultSetItem->item =
2156             (str ? atoi(str) : 1);
2157     }
2158     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2159
2160     return req;
2161 }
2162
2163 ZOOM_API(void)
2164     ZOOM_package_send (ZOOM_package p, const char *type)
2165 {
2166     Z_APDU *apdu = 0;
2167     ZOOM_connection c;
2168     if (!p)
2169         return;
2170     c = p->connection;
2171     odr_reset (p->odr_out);
2172     xfree (p->buf_out);
2173     p->buf_out = 0;
2174     if (!strcmp(type, "itemorder"))
2175     {
2176         Z_External *r;
2177         apdu = create_es_package (p, VAL_ITEMORDER);
2178         if (apdu)
2179         {
2180             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2181
2182             r->direct_reference =
2183                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2184                                        VAL_ITEMORDER);
2185             r->descriptor = 0;
2186             r->which = Z_External_itemOrder;
2187             r->indirect_reference = 0;
2188             r->u.itemOrder = encode_item_order (p);
2189
2190             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2191         }
2192     }
2193     if (apdu)
2194     {
2195         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2196         {
2197             char *buf;
2198
2199             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2200             task->u.package = p;
2201             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2202             p->buf_out = (char *) xmalloc (p->len_out);
2203             memcpy (p->buf_out, buf, p->len_out);
2204
2205             (p->refcount)++;
2206             if (!c->async)
2207             {
2208                 while (ZOOM_event (1, &c))
2209                     ;
2210             }
2211         }
2212     }
2213 }
2214
2215 ZOOM_API(ZOOM_package)
2216     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2217 {
2218     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2219
2220     p->connection = c;
2221     p->odr_out = odr_createmem (ODR_ENCODE);
2222     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2223     p->refcount = 1;
2224     p->buf_out = 0;
2225     p->len_out = 0;
2226     return p;
2227 }
2228
2229 ZOOM_API(void)
2230     ZOOM_package_destroy(ZOOM_package p)
2231 {
2232     if (!p)
2233         return;
2234     (p->refcount)--;
2235     if (p->refcount == 0)
2236     {
2237         odr_destroy (p->odr_out);
2238         xfree (p->buf_out);
2239
2240         ZOOM_options_destroy (p->options);
2241         xfree (p);
2242     }
2243 }
2244
2245 ZOOM_API(const char *)
2246 ZOOM_package_option_get (ZOOM_package p, const char *key)
2247 {
2248     return ZOOM_options_get (p->options, key);
2249 }
2250
2251
2252 ZOOM_API(void)
2253 ZOOM_package_option_set (ZOOM_package p, const char *key,
2254                               const char *val)
2255 {
2256     ZOOM_options_set (p->options, key, val);
2257 }
2258
2259 static int ZOOM_connection_exec_task (ZOOM_connection c)
2260 {
2261     ZOOM_task task = c->tasks;
2262     zoom_ret ret = zoom_complete;
2263
2264     if (!task)
2265     {
2266         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2267         return 0;
2268     }
2269     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2270              task->which, task->running);
2271     if (c->error != ZOOM_ERROR_NONE)
2272     {
2273         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2274         ZOOM_connection_remove_tasks (c);
2275         return 0;
2276     }
2277     if (task->running)
2278     {
2279         yaz_log (LOG_DEBUG, "task already running");
2280         return 0;
2281     }
2282     task->running = 1;
2283     ret = zoom_complete;
2284     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2285     {
2286         switch (task->which)
2287         {
2288         case ZOOM_TASK_SEARCH:
2289             if (c->proto == PROTO_HTTP)
2290                 ret = ZOOM_connection_srw_send_search(c);
2291             else
2292                 ret = ZOOM_connection_send_search(c);
2293             break;
2294         case ZOOM_TASK_RETRIEVE:
2295             if (c->proto == PROTO_HTTP)
2296                 ret = ZOOM_connection_srw_send_search(c);
2297             else
2298                 ret = send_present (c);
2299             break;
2300         case ZOOM_TASK_CONNECT:
2301             ret = do_connect(c);
2302             break;
2303         case ZOOM_TASK_SCAN:
2304             ret = send_scan(c);
2305             break;
2306         case ZOOM_TASK_PACKAGE:
2307             ret = send_package(c);
2308             break;
2309         }
2310     }
2311     else
2312     {
2313         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2314         ZOOM_connection_remove_tasks (c);
2315     }
2316     if (ret == zoom_complete)
2317     {
2318         yaz_log (LOG_DEBUG, "task removed (complete)");
2319         ZOOM_connection_remove_task (c);
2320         return 0;
2321     }
2322     yaz_log (LOG_DEBUG, "task pending");
2323     return 1;
2324 }
2325
2326 static zoom_ret send_sort_present (ZOOM_connection c)
2327 {
2328     zoom_ret r = send_sort (c);
2329     if (r == zoom_complete)
2330         r = send_present (c);
2331     return r;
2332 }
2333
2334 static int es_response (ZOOM_connection c,
2335                         Z_ExtendedServicesResponse *res)
2336 {
2337     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2338         return 0;
2339     if (res->diagnostics && res->num_diagnostics > 0)
2340         response_diag(c, res->diagnostics[0]);
2341     if (res->taskPackage &&
2342         res->taskPackage->which == Z_External_extendedService)
2343     {
2344         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2345         Odr_oct *id = taskPackage->targetReference;
2346
2347         if (id)
2348             ZOOM_options_setl (c->tasks->u.package->options,
2349                                "targetReference", (char*) id->buf, id->len);
2350     }
2351     return 1;
2352 }
2353
2354
2355 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2356 {
2357     Z_InitResponse *initrs;
2358
2359     c->mask = 0;
2360     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2361     switch(apdu->which)
2362     {
2363     case Z_APDU_initResponse:
2364         initrs = apdu->u.initResponse;
2365         ZOOM_connection_option_set(c, "targetImplementationId",
2366                                    initrs->implementationId ?
2367                                    initrs->implementationId : "");
2368         ZOOM_connection_option_set(c, "targetImplementationName",
2369                                    initrs->implementationName ?
2370                                    initrs->implementationName : "");
2371         ZOOM_connection_option_set(c, "targetImplementationVersion",
2372                                    initrs->implementationVersion ?
2373                                    initrs->implementationVersion : "");
2374         if (!*initrs->result)
2375         {
2376             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2377         }
2378         else
2379         {
2380             char *cookie =
2381                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2382                                           VAL_COOKIE, 1, 0);
2383             xfree (c->cookie_in);
2384             c->cookie_in = 0;
2385             if (cookie)
2386                 c->cookie_in = xstrdup(cookie);
2387             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2388                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2389                 c->support_named_resultsets = 1;
2390             if (c->tasks)
2391             {
2392                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2393                 ZOOM_connection_remove_task (c);
2394             }
2395             ZOOM_connection_exec_task (c);
2396         }
2397         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2398         {
2399             NMEM tmpmem = nmem_create();
2400             Z_CharSetandLanguageNegotiation *p =
2401                 yaz_get_charneg_record(initrs->otherInfo);
2402
2403             if (p)
2404             {
2405                 char *charset=NULL, *lang=NULL;
2406                 int sel;
2407
2408                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2409                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2410                         "language %s, select %d",
2411                         charset ? charset : "none", lang ? lang : "none", sel);
2412                 if (charset)
2413                     ZOOM_connection_option_set (c, "negotiation-charset",
2414                                                 charset);
2415                 if (lang)
2416                     ZOOM_connection_option_set (c, "negotiation-lang",
2417                                                 lang);
2418                 nmem_destroy(tmpmem);
2419             }
2420         }
2421         break;
2422     case Z_APDU_searchResponse:
2423         handle_search_response (c, apdu->u.searchResponse);
2424         if (send_sort_present (c) == zoom_complete)
2425             ZOOM_connection_remove_task (c);
2426         break;
2427     case Z_APDU_presentResponse:
2428         handle_present_response (c, apdu->u.presentResponse);
2429         if (send_present (c) == zoom_complete)
2430             ZOOM_connection_remove_task (c);
2431         break;
2432     case Z_APDU_sortResponse:
2433         sort_response (c, apdu->u.sortResponse);
2434         if (send_present (c) == zoom_complete)
2435             ZOOM_connection_remove_task (c);
2436         break;
2437     case Z_APDU_scanResponse:
2438         scan_response (c, apdu->u.scanResponse);
2439         ZOOM_connection_remove_task (c);
2440         break;
2441     case Z_APDU_extendedServicesResponse:
2442         es_response (c, apdu->u.extendedServicesResponse);
2443         ZOOM_connection_remove_task (c);
2444         break;
2445     case Z_APDU_close:
2446         if (c->reconnect_ok)
2447         {
2448             do_close(c);
2449             c->tasks->running = 0;
2450             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2451         }
2452         else
2453         {
2454             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2455             do_close(c);
2456         }
2457         break;
2458     default:
2459         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2460         do_close(c);
2461     }
2462 }
2463
2464 #if HAVE_XML2
2465 static void handle_srw_response(ZOOM_connection c,
2466                                 Z_SRW_searchRetrieveResponse *res)
2467 {
2468     ZOOM_resultset resultset = 0;
2469     int i;
2470     NMEM nmem;
2471     ZOOM_Event event;
2472
2473     if (!c->tasks)
2474         return;
2475
2476     if (c->tasks->which == ZOOM_TASK_SEARCH)
2477         resultset = c->tasks->u.search.resultset;
2478     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2479         resultset = c->tasks->u.retrieve.resultset;
2480     else
2481         return ;
2482
2483     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2484     ZOOM_connection_put_event(c, event);
2485
2486     resultset->size = 0;
2487
2488     yaz_log(LOG_DEBUG, "got SRW response OK");
2489
2490     if (res->numberOfRecords)
2491         resultset->size = *res->numberOfRecords;
2492
2493     for (i = 0; i<res->num_records; i++)
2494     {
2495         int pos;
2496
2497         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2498             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2499
2500         if (res->records[i].recordPosition &&
2501             *res->records[i].recordPosition > 0)
2502             pos = *res->records[i].recordPosition - 1;
2503         else
2504             pos = resultset->start + i;
2505
2506         npr->databaseName = 0;
2507         npr->which = Z_NamePlusRecord_databaseRecord;
2508         npr->u.databaseRecord = (Z_External *)
2509             odr_malloc(c->odr_in, sizeof(Z_External));
2510         npr->u.databaseRecord->descriptor = 0;
2511         npr->u.databaseRecord->direct_reference =
2512             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2513         npr->u.databaseRecord->which = Z_External_octet;
2514         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2515             odr_malloc(c->odr_in, sizeof(Odr_oct));
2516         npr->u.databaseRecord->u.octet_aligned->buf =
2517             res->records[i].recordData_buf;
2518         npr->u.databaseRecord->u.octet_aligned->len =
2519             npr->u.databaseRecord->u.octet_aligned->size =
2520             res->records[i].recordData_len;
2521         record_cache_add (resultset, npr, pos);
2522     }
2523     if (res->num_diagnostics > 0)
2524     {
2525         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2526                        res->diagnostics[0].details, 0);
2527     }
2528     nmem = odr_extract_mem(c->odr_in);
2529     nmem_transfer(resultset->odr->mem, nmem);
2530     nmem_destroy(nmem);
2531 }
2532 #endif
2533
2534 #if HAVE_XML2
2535 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2536 {
2537     int ret = -1;
2538     const char *content_type = z_HTTP_header_lookup(hres->headers,
2539                                                     "Content-Type");
2540     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2541                                                        "Connection");
2542     c->mask = 0;
2543     yaz_log (LOG_DEBUG, "handle_http");
2544
2545     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2546     {
2547         Z_SOAP *soap_package = 0;
2548         ODR o = odr_createmem(ODR_DECODE);
2549         Z_SOAP_Handler soap_handlers[2] = {
2550             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2551              (Z_SOAP_fun) yaz_srw_codec},
2552             {0, 0, 0}
2553         };
2554         ret = z_soap_codec(o, &soap_package,
2555                            &hres->content_buf, &hres->content_len,
2556                            soap_handlers);
2557         if (!ret && soap_package->which == Z_SOAP_generic &&
2558             soap_package->u.generic->no == 0)
2559         {
2560             Z_SRW_PDU *sr = soap_package->u.generic->p;
2561             if (sr->which == Z_SRW_searchRetrieve_response)
2562                 handle_srw_response(c, sr->u.response);
2563             else
2564                 ret = -1;
2565         }
2566         else if (!ret && (soap_package->which == Z_SOAP_fault
2567                           || soap_package->which == Z_SOAP_error))
2568         {
2569             set_HTTP_error(c, hres->code,
2570                            soap_package->u.fault->fault_code,
2571                            soap_package->u.fault->fault_string);
2572         }
2573         else
2574             ret = -1;
2575         odr_destroy(o);
2576     }
2577     if (ret)
2578     {
2579         if (hres->code != 200)
2580             set_HTTP_error(c, hres->code, 0, 0);
2581         else
2582             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2583         do_close (c);
2584     }
2585     ZOOM_connection_remove_task(c);
2586     if (!strcmp(hres->version, "1.0"))
2587     {
2588         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2589         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2590             do_close(c);
2591     }
2592     else
2593     {
2594         /* HTTP 1.1: only if no close we stay alive .. */
2595         if (connection_head && !strcmp(connection_head, "close"))
2596             do_close(c);
2597     }
2598 }
2599 #endif
2600
2601 static int do_read (ZOOM_connection c)
2602 {
2603     int r;
2604     ZOOM_Event event;
2605
2606     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2607     ZOOM_connection_put_event (c, event);
2608
2609     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2610
2611     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2612     if (r == 1)
2613         return 0;
2614     if (r <= 0)
2615     {
2616         if (c->reconnect_ok)
2617         {
2618             do_close (c);
2619             c->reconnect_ok = 0;
2620             yaz_log (LOG_DEBUG, "reconnect read");
2621             c->tasks->running = 0;
2622             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2623         }
2624         else
2625         {
2626             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2627             do_close (c);
2628         }
2629     }
2630     else
2631     {
2632         Z_GDU *gdu;
2633         ZOOM_Event event;
2634
2635         odr_reset (c->odr_in);
2636         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2637         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2638         ZOOM_connection_put_event (c, event);
2639
2640         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2641         {
2642             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2643             do_close (c);
2644         }
2645         else if (gdu->which == Z_GDU_Z3950)
2646             handle_apdu (c, gdu->u.z3950);
2647         else if (gdu->which == Z_GDU_HTTP_Response)
2648         {
2649 #if HAVE_XML2
2650             handle_http (c, gdu->u.HTTP_Response);
2651 #else
2652             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2653             do_close (c);
2654 #endif
2655         }
2656         c->reconnect_ok = 0;
2657     }
2658     return 1;
2659 }
2660
2661 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2662 {
2663     int r;
2664     ZOOM_Event event;
2665
2666     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2667     ZOOM_connection_put_event (c, event);
2668
2669     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2670     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2671     {
2672         if (c->reconnect_ok)
2673         {
2674             do_close (c);
2675             c->reconnect_ok = 0;
2676             yaz_log (LOG_DEBUG, "reconnect write");
2677             c->tasks->running = 0;
2678             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2679             return zoom_pending;
2680         }
2681         if (c->state == STATE_CONNECTING)
2682             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2683         else
2684             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2685         do_close (c);
2686         return zoom_complete;
2687     }
2688     else if (r == 1)
2689     {
2690         c->mask = ZOOM_SELECT_EXCEPT;
2691         if (c->cs->io_pending & CS_WANT_WRITE)
2692             c->mask += ZOOM_SELECT_WRITE;
2693         if (c->cs->io_pending & CS_WANT_READ)
2694             c->mask += ZOOM_SELECT_READ;
2695         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2696     }
2697     else
2698     {
2699         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2700         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2701     }
2702     return zoom_pending;
2703 }
2704
2705 static zoom_ret do_write(ZOOM_connection c)
2706 {
2707     return do_write_ex (c, c->buf_out, c->len_out);
2708 }
2709
2710
2711 ZOOM_API(const char *)
2712 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2713 {
2714     return ZOOM_options_get (c->options, key);
2715 }
2716
2717 ZOOM_API(void)
2718 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2719                                   const char *val)
2720 {
2721     ZOOM_options_set (c->options, key, val);
2722 }
2723
2724 ZOOM_API(const char *)
2725 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2726 {
2727     return ZOOM_options_get (r->options, key);
2728 }
2729
2730 ZOOM_API(void)
2731 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2732                                   const char *val)
2733 {
2734     ZOOM_options_set (r->options, key, val);
2735 }
2736
2737
2738 ZOOM_API(int)
2739 ZOOM_connection_errcode (ZOOM_connection c)
2740 {
2741     return ZOOM_connection_error (c, 0, 0);
2742 }
2743
2744 ZOOM_API(const char *)
2745 ZOOM_connection_errmsg (ZOOM_connection c)
2746 {
2747     const char *msg;
2748     ZOOM_connection_error (c, &msg, 0);
2749     return msg;
2750 }
2751
2752 ZOOM_API(const char *)
2753 ZOOM_connection_addinfo (ZOOM_connection c)
2754 {
2755     const char *addinfo;
2756     ZOOM_connection_error (c, 0, &addinfo);
2757     return addinfo;
2758 }
2759
2760 ZOOM_API(const char *)
2761 ZOOM_diag_str (int error)
2762 {
2763     switch (error)
2764     {
2765     case ZOOM_ERROR_NONE:
2766         return "No error";
2767     case ZOOM_ERROR_CONNECT:
2768         return "Connect failed";
2769     case ZOOM_ERROR_MEMORY:
2770         return "Out of memory";
2771     case ZOOM_ERROR_ENCODE:
2772         return "Encoding failed";
2773     case ZOOM_ERROR_DECODE:
2774         return "Decoding failed";
2775     case ZOOM_ERROR_CONNECTION_LOST:
2776         return "Connection lost";
2777     case ZOOM_ERROR_INIT:
2778         return "Init rejected";
2779     case ZOOM_ERROR_INTERNAL:
2780         return "Internal failure";
2781     case ZOOM_ERROR_TIMEOUT:
2782         return "Timeout";
2783     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2784         return "Unsupported protocol";
2785     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2786         return "Unsupported query type";
2787     default:
2788         return diagbib1_str (error);
2789     }
2790 }
2791
2792 ZOOM_API(int)
2793 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2794                          const char **addinfo, const char **diagset)
2795 {
2796     int error = c->error;
2797     if (cp)
2798     {
2799         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2800             *cp = ZOOM_diag_str(error);
2801         else if (!strcmp(c->diagset, "HTTP"))
2802             *cp = z_HTTP_errmsg(c->error);
2803         else if (!strcmp(c->diagset, "Bib-1"))
2804             *cp = ZOOM_diag_str(error);
2805         else if (!strcmp(c->diagset, "SRW"))
2806             *cp = yaz_diag_srw_str(c->error);
2807         else
2808             *cp = "Unknown error and diagnostic set";
2809     }
2810     if (addinfo)
2811         *addinfo = c->addinfo ? c->addinfo : "";
2812     if (diagset)
2813         *diagset = c->diagset ? c->diagset : "";
2814     return c->error;
2815 }
2816
2817 ZOOM_API(int)
2818 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2819                        const char **addinfo)
2820 {
2821     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2822 }
2823
2824 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2825 {
2826     ZOOM_Event event = 0;
2827     int r = cs_look(c->cs);
2828     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2829              c, mask, r);
2830
2831     if (r == CS_NONE)
2832     {
2833         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2834         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2835         do_close (c);
2836         ZOOM_connection_put_event (c, event);
2837     }
2838     else if (r == CS_CONNECT)
2839     {
2840         int ret;
2841         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2842
2843         ret = cs_rcvconnect (c->cs);
2844         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2845         if (ret == 1)
2846         {
2847             c->mask = ZOOM_SELECT_EXCEPT;
2848             if (c->cs->io_pending & CS_WANT_WRITE)
2849                 c->mask += ZOOM_SELECT_WRITE;
2850             if (c->cs->io_pending & CS_WANT_READ)
2851                 c->mask += ZOOM_SELECT_READ;
2852             ZOOM_connection_put_event (c, event);
2853         }
2854         else if (ret == 0)
2855         {
2856             ZOOM_connection_put_event (c, event);
2857             if (c->proto == PROTO_Z3950)
2858                 ZOOM_connection_send_init(c);
2859             else
2860             {
2861                 /* no init request for SRW .. */
2862                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2863                 ZOOM_connection_remove_task (c);
2864                 c->mask = 0;
2865                 ZOOM_connection_exec_task (c);
2866             }
2867             c->state = STATE_ESTABLISHED;
2868         }
2869         else
2870         {
2871             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2872             do_close (c);
2873             ZOOM_connection_put_event (c, event);
2874         }
2875     }
2876     else
2877     {
2878         if (mask & ZOOM_SELECT_READ)
2879             do_read (c);
2880         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2881             do_write (c);
2882     }
2883     return 1;
2884 }
2885
2886 ZOOM_API(int)
2887 ZOOM_connection_last_event(ZOOM_connection cs)
2888 {
2889     if (!cs)
2890         return ZOOM_EVENT_NONE;
2891     return cs->last_event;
2892 }
2893
2894 ZOOM_API(int)
2895 ZOOM_event (int no, ZOOM_connection *cs)
2896 {
2897     int timeout = 5000;
2898 #if HAVE_SYS_POLL_H
2899     struct pollfd pollfds[1024];
2900     ZOOM_connection poll_cs[1024];
2901 #else
2902     struct timeval tv;
2903     fd_set input, output, except;
2904 #endif
2905     int i, r, nfds;
2906     int max_fd = 0;
2907
2908     for (i = 0; i<no; i++)
2909     {
2910         ZOOM_connection c = cs[i];
2911         ZOOM_Event event;
2912         if (c && (event = ZOOM_connection_get_event(c)))
2913         {
2914             ZOOM_Event_destroy (event);
2915             return i+1;
2916         }
2917     }
2918     for (i = 0; i<no; i++)
2919     {
2920         ZOOM_connection c = cs[i];
2921         ZOOM_Event event;
2922         if (c && ZOOM_connection_exec_task (c))
2923         {
2924             if ((event = ZOOM_connection_get_event(c)))
2925             {
2926                 ZOOM_Event_destroy (event);
2927                 return i+1;
2928             }
2929         }
2930     }
2931 #if HAVE_SYS_POLL_H
2932
2933 #else
2934     FD_ZERO (&input);
2935     FD_ZERO (&output);
2936     FD_ZERO (&except);
2937 #endif
2938     nfds = 0;
2939     for (i = 0; i<no; i++)
2940     {
2941         ZOOM_connection c = cs[i];
2942         int fd, mask;
2943         int this_timeout;
2944
2945         if (!c)
2946             continue;
2947         fd = z3950_connection_socket(c);
2948         mask = z3950_connection_mask(c);
2949
2950         if (fd == -1)
2951             continue;
2952         if (max_fd < fd)
2953             max_fd = fd;
2954
2955         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2956         if (this_timeout != -1 && this_timeout < timeout)
2957             timeout = this_timeout;
2958 #if HAVE_SYS_POLL_H
2959         if (mask)
2960         {
2961             short poll_events = 0;
2962
2963             if (mask & ZOOM_SELECT_READ)
2964                 poll_events += POLLIN;
2965             if (mask & ZOOM_SELECT_WRITE)
2966                 poll_events += POLLOUT;
2967             if (mask & ZOOM_SELECT_EXCEPT)
2968                 poll_events += POLLERR;
2969             pollfds[nfds].fd = fd;
2970             pollfds[nfds].events = poll_events;
2971             pollfds[nfds].revents = 0;
2972             poll_cs[nfds] = c;
2973             nfds++;
2974         }
2975 #else
2976         if (mask & ZOOM_SELECT_READ)
2977         {
2978             FD_SET (fd, &input);
2979             nfds++;
2980         }
2981         if (mask & ZOOM_SELECT_WRITE)
2982         {
2983             FD_SET (fd, &output);
2984             nfds++;
2985         }
2986         if (mask & ZOOM_SELECT_EXCEPT)
2987         {
2988             FD_SET (fd, &except);
2989             nfds++;
2990         }
2991 #endif
2992     }
2993     if (timeout >= 5000)
2994         timeout = 30;
2995
2996     if (!nfds)
2997         return 0;
2998
2999 #if HAVE_SYS_POLL_H
3000     r = poll (pollfds, nfds, timeout * 1000);
3001     for (i = 0; i<nfds; i++)
3002     {
3003         ZOOM_connection c = poll_cs[i];
3004         if (r && c->mask)
3005         {
3006             int mask = 0;
3007             if (pollfds[i].revents & POLLIN)
3008                 mask += ZOOM_SELECT_READ;
3009             if (pollfds[i].revents & POLLOUT)
3010                 mask += ZOOM_SELECT_WRITE;
3011             if (pollfds[i].revents & POLLERR)
3012                 mask += ZOOM_SELECT_EXCEPT;
3013             if (mask)
3014                 ZOOM_connection_do_io(c, mask);
3015         }
3016         else if (r == 0 && c->mask)
3017         {
3018             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3019             /* timeout and this connection was waiting */
3020             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3021             do_close (c);
3022             ZOOM_connection_put_event(c, event);
3023         }
3024     }
3025 #else
3026     tv.tv_sec = timeout;
3027     tv.tv_usec = 0;
3028     yaz_log (LOG_DEBUG, "select start");
3029     r = select (max_fd+1, &input, &output, &except, &tv);
3030     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3031     for (i = 0; i<no; i++)
3032     {
3033         ZOOM_connection c = cs[i];
3034         int fd, mask;
3035
3036         if (!c)
3037             continue;
3038         fd = z3950_connection_socket(c);
3039         mask = 0;
3040         if (r && c->mask)
3041         {
3042             /* no timeout and real socket */
3043             if (FD_ISSET(fd, &input))
3044                 mask += ZOOM_SELECT_READ;
3045             if (FD_ISSET(fd, &output))
3046                 mask += ZOOM_SELECT_WRITE;
3047             if (FD_ISSET(fd, &except))
3048                 mask += ZOOM_SELECT_EXCEPT;
3049             if (mask)
3050                 ZOOM_connection_do_io(c, mask);
3051         }
3052         if (r == 0 && c->mask)
3053         {
3054             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3055             /* timeout and this connection was waiting */
3056             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3057             do_close (c);
3058             yaz_log (LOG_DEBUG, "timeout");
3059             ZOOM_connection_put_event(c, event);
3060         }
3061     }
3062 #endif
3063     for (i = 0; i<no; i++)
3064     {
3065         ZOOM_connection c = cs[i];
3066         ZOOM_Event event;
3067         if (c && (event = ZOOM_connection_get_event(c)))
3068         {
3069             ZOOM_Event_destroy (event);
3070             return i+1;
3071         }
3072     }
3073     return 0;
3074 }