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 1.30 2003-04-17 19:43:41 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         return 0;
  72     assert (c->m_queue_back);
  73     c->m_queue_front = event->prev;
  74     if (c->m_queue_front)
  75     {
  76         assert (c->m_queue_back);
  77         c->m_queue_front->next = 0;
  78     }
  79     else
  80         c->m_queue_back = 0;
  81     c->last_event = event->kind;
  82     return event;
  83 }
  84
  85
  86 static void set_dset_error (ZOOM_connection c, int error,
  87                             const char *dset,
  88                             const char *addinfo, const char *addinfo2)
  89 {
  90     xfree (c->addinfo);
  91     c->addinfo = 0;
  92     c->error = error;
  93     c->diagset = dset;
  94     if (addinfo && addinfo2)
  95     {
  96         c->addinfo = xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
  97         strcpy(c->addinfo, addinfo);
  98         strcat(c->addinfo, addinfo2);
  99     }
 100     else if (addinfo)
 101         c->addinfo = xstrdup(addinfo);
 102     if (error)
 103         yaz_log(LOG_DEBUG, "Error %s %s:%d %s %s",
 104                 c->host_port ? c->host_port : "<>", dset, error,
 105                 addinfo ? addinfo : "",
 106                 addinfo2 ? addinfo2 : "");
 107 }
 108
 109 static void set_HTTP_error (ZOOM_connection c, int error,
 110                             const char *addinfo, const char *addinfo2)
 111 {
 112     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 113 }
 114
 115 static void set_ZOOM_error (ZOOM_connection c, int error,
 116                             const char *addinfo)
 117 {
 118     set_dset_error(c, error, "ZOOM", addinfo, 0);
 119 }
 120
 121 static void clear_error (ZOOM_connection c)
 122 {
 123
 124     switch (c->error)
 125     {
 126     case ZOOM_ERROR_CONNECT:
 127     case ZOOM_ERROR_MEMORY:
 128     case ZOOM_ERROR_DECODE:
 129     case ZOOM_ERROR_CONNECTION_LOST:
 130     case ZOOM_ERROR_INIT:
 131     case ZOOM_ERROR_INTERNAL:
 132     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 133         break;
 134     default:
 135         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 136     }
 137 }
 138
 139 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 140 {
 141     ZOOM_task *taskp = &c->tasks;
 142     while (*taskp)
 143         taskp = &(*taskp)->next;
 144     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 145     (*taskp)->running = 0;
 146     (*taskp)->which = which;
 147     (*taskp)->next = 0;
 148     clear_error (c);
 149     return *taskp;
 150 }
 151
 152 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 153 {
 154     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 155
 156     task->next = c->tasks;
 157     c->tasks = task;
 158
 159     task->running = 0;
 160     task->which = which;
 161     clear_error (c);
 162     return task;
 163 }
 164
 165 void ZOOM_connection_remove_task (ZOOM_connection c)
 166 {
 167     ZOOM_task task = c->tasks;
 168
 169     if (task)
 170     {
 171         c->tasks = task->next;
 172         switch (task->which)
 173         {
 174         case ZOOM_TASK_SEARCH:
 175             ZOOM_resultset_destroy (task->u.search.resultset);
 176             break;
 177         case ZOOM_TASK_RETRIEVE:
 178             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 179             break;
 180         case ZOOM_TASK_CONNECT:
 181             break;
 182         case ZOOM_TASK_SCAN:
 183             ZOOM_scanset_destroy (task->u.scan.scan);
 184             break;
 185         case ZOOM_TASK_PACKAGE:
 186             ZOOM_package_destroy (task->u.package);
 187             break;
 188         default:
 189             assert (0);
 190         }
 191         xfree (task);
 192     }
 193 }
 194
 195 static int ZOOM_connection_exec_task (ZOOM_connection c);
 196
 197 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 198 {
 199     while (c->tasks)
 200         ZOOM_connection_remove_task(c);
 201 }
 202
 203 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 204
 205 ZOOM_API(ZOOM_connection)
 206 ZOOM_connection_create (ZOOM_options options)
 207 {
 208     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 209
 210     c->proto = PROTO_Z3950;
 211     c->cs = 0;
 212     c->mask = 0;
 213     c->reconnect_ok = 0;
 214     c->state = STATE_IDLE;
 215     c->addinfo = 0;
 216     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 217     c->buf_in = 0;
 218     c->len_in = 0;
 219     c->buf_out = 0;
 220     c->len_out = 0;
 221     c->resultsets = 0;
 222
 223     c->options = ZOOM_options_create_with_parent(options);
 224
 225     c->host_port = 0;
 226     c->path = 0;
 227     c->proxy = 0;
 228
 229     c->charset = c->lang = 0;
 230
 231     c->cookie_out = 0;
 232     c->cookie_in = 0;
 233     c->client_IP = 0;
 234     c->tasks = 0;
 235
 236     c->odr_in = odr_createmem (ODR_DECODE);
 237     c->odr_out = odr_createmem (ODR_ENCODE);
 238
 239     c->async = 0;
 240     c->support_named_resultsets = 0;
 241     c->last_event = ZOOM_EVENT_NONE;
 242
 243     c->m_queue_front = 0;
 244     c->m_queue_back = 0;
 245     return c;
 246 }
 247
 248 /* set database names. Take local databases (if set); otherwise
 249    take databases given in ZURL (if set); otherwise use Default */
 250 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 251                                  int *num)
 252 {
 253     char **databaseNames;
 254     const char *c;
 255     int no = 2;
 256     const char *cp = ZOOM_options_get (options, "databaseName");
 257
 258     if (!cp || !*cp)
 259     {
 260         if (strncmp (con->host_port, "unix:", 5) == 0)
 261             cp = strchr (con->host_port+5, ':');
 262         else
 263             cp = strchr (con->host_port, '/');
 264         if (cp)
 265             cp++;
 266     }
 267     if (cp)
 268     {
 269         c = cp;
 270         while ((c = strchr(c, '+')))
 271         {
 272             c++;
 273             no++;
 274         }
 275     }
 276     else
 277         cp = "Default";
 278     databaseNames = (char**)
 279         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 280     no = 0;
 281     while (*cp)
 282     {
 283         c = strchr (cp, '+');
 284         if (!c)
 285             c = cp + strlen(cp);
 286         else if (c == cp)
 287         {
 288             cp++;
 289             continue;
 290         }
 291         /* cp ptr to first char of db name, c is char
 292            following db name */
 293         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 294         memcpy (databaseNames[no], cp, c-cp);
 295         databaseNames[no++][c-cp] = '\0';
 296         cp = c;
 297         if (*cp)
 298             cp++;
 299     }
 300     databaseNames[no] = NULL;
 301     *num = no;
 302     return databaseNames;
 303 }
 304
 305 ZOOM_API(ZOOM_connection)
 306 ZOOM_connection_new (const char *host, int portnum)
 307 {
 308     ZOOM_connection c = ZOOM_connection_create (0);
 309
 310     ZOOM_connection_connect (c, host, portnum);
 311     return c;
 312 }
 313
 314 ZOOM_API(void)
 315 ZOOM_connection_connect(ZOOM_connection c,
 316                         const char *host, int portnum)
 317 {
 318     const char *val;
 319     ZOOM_task task;
 320
 321     if (c->cs)
 322     {
 323         yaz_log (LOG_DEBUG, "reconnect");
 324         c->reconnect_ok = 1;
 325         return;
 326     }
 327     yaz_log(LOG_DEBUG, "connect");
 328     xfree (c->proxy);
 329     val = ZOOM_options_get (c->options, "proxy");
 330     if (val && *val)
 331         c->proxy = xstrdup (val);
 332     else
 333         c->proxy = 0;
 334
 335     xfree (c->charset);
 336     val = ZOOM_options_get (c->options, "charset");
 337     if (val && *val)
 338         c->charset = xstrdup (val);
 339     else
 340         c->charset = 0;
 341
 342     xfree (c->lang);
 343     val = ZOOM_options_get (c->options, "lang");
 344     if (val && *val)
 345         c->lang = xstrdup (val);
 346     else
 347         c->lang = 0;
 348
 349     xfree (c->host_port);
 350     if (portnum)
 351     {
 352         char hostn[128];
 353         sprintf (hostn, "%.80s:%d", host, portnum);
 354         c->host_port = xstrdup(hostn);
 355     }
 356     else
 357         c->host_port = xstrdup(host);
 358
 359     ZOOM_options_set(c->options, "host", c->host_port);
 360
 361     val = ZOOM_options_get (c->options, "cookie");
 362     if (val && *val)
 363         c->cookie_out = xstrdup (val);
 364
 365     val = ZOOM_options_get (c->options, "clientIP");
 366     if (val && *val)
 367         c->client_IP = xstrdup (val);
 368
 369     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 370
 371     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 372
 373     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 374
 375     if (!c->async)
 376     {
 377         while (ZOOM_event (1, &c))
 378             ;
 379     }
 380 }
 381
 382 ZOOM_API(ZOOM_query)
 383 ZOOM_query_create(void)
 384 {
 385     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 386
 387     s->refcount = 1;
 388     s->z_query = 0;
 389     s->sort_spec = 0;
 390     s->odr = odr_createmem (ODR_ENCODE);
 391     s->query_string = 0;
 392
 393     return s;
 394 }
 395
 396 ZOOM_API(void)
 397 ZOOM_query_destroy(ZOOM_query s)
 398 {
 399     if (!s)
 400         return;
 401
 402     (s->refcount)--;
 403     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 404     if (s->refcount == 0)
 405     {
 406         odr_destroy (s->odr);
 407         xfree (s);
 408     }
 409 }
 410
 411 ZOOM_API(int)
 412 ZOOM_query_prefix(ZOOM_query s, const char *str)
 413 {
 414     s->query_string = odr_strdup(s->odr, str);
 415     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 416     s->z_query->which = Z_Query_type_1;
 417     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 418     if (!s->z_query->u.type_1)
 419         return -1;
 420     return 0;
 421 }
 422
 423 ZOOM_API(int)
 424 ZOOM_query_cql(ZOOM_query s, const char *str)
 425 {
 426     Z_External *ext;
 427
 428     s->query_string = odr_strdup(s->odr, str);
 429
 430     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 431     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 432     ext->indirect_reference = 0;
 433     ext->descriptor = 0;
 434     ext->which = Z_External_CQL;
 435     ext->u.cql = s->query_string;
 436
 437     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 438     s->z_query->which = Z_Query_type_104;
 439     s->z_query->u.type_104 =  ext;
 440
 441     return 0;
 442 }
 443
 444 ZOOM_API(int)
 445 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 446 {
 447     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 448     if (!s->sort_spec)
 449         return -1;
 450     return 0;
 451 }
 452
 453 static zoom_ret do_write(ZOOM_connection c);
 454
 455 ZOOM_API(void)
 456 ZOOM_connection_destroy(ZOOM_connection c)
 457 {
 458     ZOOM_resultset r;
 459     if (!c)
 460         return;
 461     if (c->cs)
 462         cs_close (c->cs);
 463     for (r = c->resultsets; r; r = r->next)
 464         r->connection = 0;
 465
 466     xfree (c->buf_in);
 467     xfree (c->addinfo);
 468     odr_destroy (c->odr_in);
 469     odr_destroy (c->odr_out);
 470     ZOOM_options_destroy (c->options);
 471     ZOOM_connection_remove_tasks (c);
 472     xfree (c->host_port);
 473     xfree (c->path);
 474     xfree (c->proxy);
 475     xfree (c->charset);
 476     xfree (c->lang);
 477     xfree (c->cookie_out);
 478     xfree (c->cookie_in);
 479     xfree (c->client_IP);
 480     xfree (c);
 481 }
 482
 483 void ZOOM_resultset_addref (ZOOM_resultset r)
 484 {
 485     if (r)
 486     {
 487         (r->refcount)++;
 488         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 489                  r, r->refcount);
 490     }
 491 }
 492 ZOOM_resultset ZOOM_resultset_create ()
 493 {
 494     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 495
 496     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 497     r->refcount = 1;
 498     r->size = 0;
 499     r->odr = odr_createmem (ODR_ENCODE);
 500     r->start = 0;
 501     r->piggyback = 1;
 502     r->setname = 0;
 503     r->schema = 0;
 504     r->count = 0;
 505     r->record_cache = 0;
 506     r->r_sort_spec = 0;
 507     r->query = 0;
 508     r->connection = 0;
 509     r->next = 0;
 510     return r;
 511 }
 512
 513 ZOOM_API(ZOOM_resultset)
 514 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 515 {
 516     ZOOM_resultset r;
 517     ZOOM_query s = ZOOM_query_create();
 518
 519     ZOOM_query_prefix (s, q);
 520
 521     r = ZOOM_connection_search (c, s);
 522     ZOOM_query_destroy (s);
 523     return r;
 524 }
 525
 526 ZOOM_API(ZOOM_resultset)
 527 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 528 {
 529     ZOOM_resultset r = ZOOM_resultset_create ();
 530     ZOOM_task task;
 531     const char *cp;
 532
 533     r->r_sort_spec = q->sort_spec;
 534     r->query = q;
 535
 536     r->options = ZOOM_options_create_with_parent(c->options);
 537
 538     r->start = ZOOM_options_get_int(r->options, "start", 0);
 539     r->count = ZOOM_options_get_int(r->options, "count", 0);
 540     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 541     cp = ZOOM_options_get (r->options, "setname");
 542     if (cp)
 543         r->setname = xstrdup(cp);
 544     cp = ZOOM_options_get (r->options, "schema");
 545     if (cp)
 546         r->schema = xstrdup(cp);
 547
 548     r->connection = c;
 549
 550     r->next = c->resultsets;
 551     c->resultsets = r;
 552
 553     if (c->host_port && c->proto == PROTO_HTTP)
 554     {
 555         if (!c->cs)
 556         {
 557             yaz_log(LOG_DEBUG, "NO COMSTACK");
 558             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 559         }
 560         else
 561         {
 562             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 563             c->reconnect_ok = 1;
 564         }
 565     }
 566
 567     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 568     task->u.search.resultset = r;
 569     ZOOM_resultset_addref (r);
 570
 571     (q->refcount)++;
 572
 573     if (!c->async)
 574     {
 575         while (ZOOM_event (1, &c))
 576             ;
 577     }
 578     return r;
 579 }
 580
 581 ZOOM_API(void)
 582 ZOOM_resultset_destroy(ZOOM_resultset r)
 583 {
 584     if (!r)
 585         return;
 586     (r->refcount)--;
 587     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 588              r, r->refcount);
 589     if (r->refcount == 0)
 590     {
 591         ZOOM_record_cache rc;
 592
 593         for (rc = r->record_cache; rc; rc = rc->next)
 594             if (rc->rec.wrbuf_marc)
 595                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 596         if (r->connection)
 597         {
 598             /* remove ourselves from the resultsets in connection */
 599             ZOOM_resultset *rp = &r->connection->resultsets;
 600             while (1)
 601             {
 602                 assert (*rp);   /* we must be in this list!! */
 603                 if (*rp == r)
 604                 {   /* OK, we're here - take us out of it */
 605                     *rp = (*rp)->next;
 606                     break;
 607                 }
 608                 rp = &(*rp)->next;
 609             }
 610         }
 611         ZOOM_query_destroy (r->query);
 612         ZOOM_options_destroy (r->options);
 613         odr_destroy (r->odr);
 614         xfree (r->setname);
 615         xfree (r->schema);
 616         xfree (r);
 617     }
 618 }
 619
 620 ZOOM_API(size_t)
 621 ZOOM_resultset_size (ZOOM_resultset r)
 622 {
 623     return r->size;
 624 }
 625
 626 static void do_close (ZOOM_connection c)
 627 {
 628     if (c->cs)
 629         cs_close(c->cs);
 630     c->cs = 0;
 631     c->mask = 0;
 632     c->state = STATE_IDLE;
 633 }
 634
 635 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 636                                      int force_sync, int start, int count)
 637 {
 638     ZOOM_task task;
 639     ZOOM_connection c;
 640     const char *cp;
 641
 642     if (!r)
 643         return;
 644     c = r->connection;
 645     if (!c)
 646         return;
 647
 648     if (c->host_port && c->proto == PROTO_HTTP)
 649     {
 650         if (!c->cs)
 651         {
 652             yaz_log(LOG_DEBUG, "NO COMSTACK");
 653             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 654         }
 655         else
 656         {
 657             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 658             c->reconnect_ok = 1;
 659         }
 660     }
 661     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 662     task->u.retrieve.resultset = r;
 663     task->u.retrieve.start = start;
 664     task->u.retrieve.count = count;
 665
 666     cp = ZOOM_options_get (r->options, "schema");
 667     if (cp)
 668     {
 669         if (!r->schema || strcmp(r->schema, cp))
 670         {
 671             xfree(r->schema);
 672             r->schema = xstrdup(cp);
 673         }
 674     }
 675
 676     ZOOM_resultset_addref (r);
 677
 678     if (!r->connection->async || force_sync)
 679         while (r->connection && ZOOM_event (1, &r->connection))
 680             ;
 681 }
 682
 683 ZOOM_API(void)
 684 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 685                         size_t start, size_t count)
 686 {
 687     int force_present = 0;
 688
 689     if (!r)
 690         return ;
 691     if (count && recs)
 692         force_present = 1;
 693     ZOOM_resultset_retrieve (r, force_present, start, count);
 694     if (force_present)
 695     {
 696         size_t i;
 697         for (i = 0; i< count; i++)
 698             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 699     }
 700 }
 701
 702 static zoom_ret do_connect (ZOOM_connection c)
 703 {
 704     void *add;
 705     const char *effective_host;
 706
 707     if (c->proxy)
 708         effective_host = c->proxy;
 709     else
 710         effective_host = c->host_port;
 711
 712     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 713
 714     assert (!c->cs);
 715     c->cs = cs_create_host (effective_host, 0, &add);
 716
 717     if (c->cs && c->cs->protocol == PROTO_HTTP)
 718     {
 719 #if HAVE_XML2
 720         const char *path = 0;
 721
 722         c->proto = PROTO_HTTP;
 723         cs_get_host_args(c->host_port, &path);
 724         xfree(c->path);
 725         c->path = xstrdup(path);
 726 #else
 727         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 728         do_close(c);
 729         return zoom_complete;
 730 #endif
 731     }
 732     if (c->cs)
 733     {
 734         int ret = cs_connect (c->cs, add);
 735         if (ret == 0)
 736         {
 737             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 738             ZOOM_connection_put_event(c, event);
 739             if (c->proto == PROTO_Z3950)
 740                 ZOOM_connection_send_init(c);
 741             else
 742             {
 743                 /* no init request for SRW .. */
 744                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 745                 ZOOM_connection_remove_task (c);
 746                 c->mask = 0;
 747                 ZOOM_connection_exec_task (c);
 748             }
 749             c->state = STATE_ESTABLISHED;
 750             return zoom_pending;
 751         }
 752         else if (ret > 0)
 753         {
 754             c->state = STATE_CONNECTING;
 755             c->mask = ZOOM_SELECT_EXCEPT;
 756             if (c->cs->io_pending & CS_WANT_WRITE)
 757                 c->mask += ZOOM_SELECT_WRITE;
 758             if (c->cs->io_pending & CS_WANT_READ)
 759                 c->mask += ZOOM_SELECT_READ;
 760             return zoom_pending;
 761         }
 762     }
 763     c->state = STATE_IDLE;
 764     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 765     return zoom_complete;
 766 }
 767
 768 int z3950_connection_socket(ZOOM_connection c)
 769 {
 770     if (c->cs)
 771         return cs_fileno(c->cs);
 772     return -1;
 773 }
 774
 775 int z3950_connection_mask(ZOOM_connection c)
 776 {
 777     if (c->cs)
 778         return c->mask;
 779     return 0;
 780 }
 781
 782 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 783 {
 784     int i;
 785     for (i = 0; i<200; i++)
 786     {
 787         size_t len;
 788         Z_OtherInformation **oi;
 789         char buf[80];
 790         const char *val;
 791         const char *cp;
 792         int oidval;
 793
 794         sprintf (buf, "otherInfo%d", i);
 795         val = ZOOM_options_get (c->options, buf);
 796         if (!val)
 797             break;
 798         cp = strchr (val, ':');
 799         if (!cp)
 800             continue;
 801         len = cp - val;
 802         if (len >= sizeof(buf))
 803             len = sizeof(buf)-1;
 804         memcpy (buf, val, len);
 805         buf[len] = '\0';
 806         oidval = oid_getvalbyname (buf);
 807         if (oidval == VAL_NONE)
 808             continue;
 809
 810         yaz_oi_APDU(a, &oi);
 811         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 812     }
 813 }
 814
 815 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 816 {
 817     assert (a);
 818     if (c->cookie_out)
 819     {
 820         Z_OtherInformation **oi;
 821         yaz_oi_APDU(a, &oi);
 822         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 823     }
 824     if (c->client_IP)
 825     {
 826         Z_OtherInformation **oi;
 827         yaz_oi_APDU(a, &oi);
 828         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 829     }
 830     otherInfo_attach (c, a, out);
 831     if (!z_APDU(out, &a, 0, 0))
 832     {
 833         FILE *outf = fopen("/tmp/apdu.txt", "a");
 834         if (a && outf)
 835         {
 836             ODR odr_pr = odr_createmem(ODR_PRINT);
 837             fprintf (outf, "a=%p\n", a);
 838             odr_setprint(odr_pr, outf);
 839             z_APDU(odr_pr, &a, 0, 0);
 840             odr_destroy(odr_pr);
 841         }
 842         yaz_log (LOG_DEBUG, "encoding failed");
 843         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 844         odr_reset(out);
 845         return -1;
 846     }
 847
 848     return 0;
 849 }
 850
 851 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 852 {
 853     ZOOM_Event event;
 854     assert (a);
 855     if (encode_APDU(c, a, c->odr_out))
 856         return zoom_complete;
 857     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 858     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 859     ZOOM_connection_put_event (c, event);
 860     odr_reset(c->odr_out);
 861     return do_write (c);
 862 }
 863
 864 /* returns 1 if PDU was sent OK (still pending )
 865            0 if PDU was not sent OK (nothing to wait for)
 866 */
 867
 868 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 869 {
 870     const char *impname;
 871     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 872     Z_InitRequest *ireq = apdu->u.initRequest;
 873     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 874         odr_malloc(c->odr_out, sizeof(*auth));
 875     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 876     const char *auth_userId = ZOOM_options_get (c->options, "user");
 877     const char *auth_password = ZOOM_options_get (c->options, "pass");
 878
 879     ODR_MASK_SET(ireq->options, Z_Options_search);
 880     ODR_MASK_SET(ireq->options, Z_Options_present);
 881     ODR_MASK_SET(ireq->options, Z_Options_scan);
 882     ODR_MASK_SET(ireq->options, Z_Options_sort);
 883     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 884     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 885
 886     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 887     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 888     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 889
 890     impname = ZOOM_options_get (c->options, "implementationName");
 891     ireq->implementationName =
 892         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 893     strcpy (ireq->implementationName, "");
 894     if (impname)
 895     {
 896         strcat (ireq->implementationName, impname);
 897         strcat (ireq->implementationName, "/");
 898     }
 899     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 900
 901     *ireq->maximumRecordSize =
 902         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 903     *ireq->preferredMessageSize =
 904         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 905
 906     if (auth_groupId || auth_password)
 907     {
 908         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 909         int i = 0;
 910         pass->groupId = 0;
 911         if (auth_groupId && *auth_groupId)
 912         {
 913             pass->groupId = (char *)
 914                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 915             strcpy(pass->groupId, auth_groupId);
 916             i++;
 917         }
 918         pass->userId = 0;
 919         if (auth_userId && *auth_userId)
 920         {
 921             pass->userId = (char *)
 922                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 923             strcpy(pass->userId, auth_userId);
 924             i++;
 925         }
 926         pass->password = 0;
 927         if (auth_password && *auth_password)
 928         {
 929             pass->password = (char *)
 930                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 931             strcpy(pass->password, auth_password);
 932             i++;
 933         }
 934         if (i)
 935         {
 936             auth->which = Z_IdAuthentication_idPass;
 937             auth->u.idPass = pass;
 938             ireq->idAuthentication = auth;
 939         }
 940     }
 941     else if (auth_userId)
 942     {
 943         auth->which = Z_IdAuthentication_open;
 944         auth->u.open = (char *)
 945             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 946         strcpy(auth->u.open, auth_userId);
 947         ireq->idAuthentication = auth;
 948     }
 949     if (c->proxy)
 950         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 951                                  VAL_PROXY, 1, c->host_port);
 952     if (c->charset||c->lang)
 953     {
 954         Z_OtherInformation **oi;
 955         Z_OtherInformationUnit *oi_unit;
 956
 957         yaz_oi_APDU(apdu, &oi);
 958
 959         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 960         {
 961             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 962
 963             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 964             oi_unit->information.externallyDefinedInfo =
 965                 yaz_set_proposal_charneg
 966                 (c->odr_out,
 967                  (const char **)&c->charset, (c->charset) ? 1:0,
 968                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 969         }
 970     }
 971     assert (apdu);
 972     return send_APDU (c, apdu);
 973 }
 974
 975 #if HAVE_XML2
 976 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
 977 {
 978     char ctype[50];
 979     Z_SOAP_Handler h[2] = {
 980         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 981         {0, 0, 0}
 982     };
 983     ODR o = odr_createmem(ODR_ENCODE);
 984     int ret;
 985     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 986     Z_GDU *gdu;
 987     ZOOM_Event event;
 988
 989     gdu = z_get_HTTP_Request(c->odr_out);
 990     gdu->u.HTTP_Request->path = c->path;
 991
 992     strcpy(ctype, "text/xml");
 993     if (c->charset && strlen(c->charset) < 20)
 994     {
 995         strcat(ctype, "; charset=");
 996         strcat(ctype, c->charset);
 997     }
 998     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 999                       "Content-Type", ctype);
1000     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1001                       "SOAPAction", "\"\"");
1002     p->which = Z_SOAP_generic;
1003     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1004     p->u.generic->no = 0;
1005     p->u.generic->ns = 0;
1006     p->u.generic->p = sr;
1007     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1008
1009     ret = z_soap_codec_enc(o, &p,
1010                            &gdu->u.HTTP_Request->content_buf,
1011                            &gdu->u.HTTP_Request->content_len, h,
1012                            c->charset);
1013
1014     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1015         return zoom_complete;
1016     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1017
1018     odr_destroy(o);
1019
1020     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1021     ZOOM_connection_put_event (c, event);
1022     odr_reset(c->odr_out);
1023     return do_write (c);
1024 }
1025 #endif
1026
1027 #if HAVE_XML2
1028 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1029 {
1030     int i;
1031     ZOOM_resultset resultset = 0;
1032     Z_SRW_PDU *sr = 0;
1033     const char *recordPacking = 0;
1034
1035     if (c->error)                  /* don't continue on error */
1036         return zoom_complete;
1037     assert (c->tasks);
1038     if (c->tasks->which == ZOOM_TASK_SEARCH)
1039     {
1040         resultset = c->tasks->u.search.resultset;
1041         resultset->setname = xstrdup ("default");
1042         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1043     }
1044     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1045     {
1046         resultset = c->tasks->u.retrieve.resultset;
1047
1048         resultset->start = c->tasks->u.retrieve.start;
1049         resultset->count = c->tasks->u.retrieve.count;
1050
1051         if (resultset->start >= resultset->size)
1052             return zoom_complete;
1053         if (resultset->start + resultset->count > resultset->size)
1054             resultset->count = resultset->size - resultset->start;
1055
1056         for (i = 0; i<resultset->count; i++)
1057         {
1058             ZOOM_record rec =
1059                 record_cache_lookup (resultset, i + resultset->start);
1060             if (!rec)
1061                 break;
1062         }
1063         if (i == resultset->count)
1064             return zoom_complete;
1065     }
1066     assert(resultset->query);
1067
1068     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1069
1070     if (resultset->query->z_query->which == Z_Query_type_104
1071         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1072     {
1073
1074         sr->u.request->query_type = Z_SRW_query_type_cql;
1075         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1076     }
1077     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1078              resultset->query->z_query->u.type_1)
1079     {
1080         sr->u.request->query_type = Z_SRW_query_type_pqf;
1081         sr->u.request->query.pqf = resultset->query->query_string;
1082     }
1083     else
1084     {
1085         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1086         return zoom_complete;
1087     }
1088     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1089     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1090     sr->u.request->recordSchema = resultset->schema;
1091
1092     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1093
1094     if (recordPacking)
1095         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1096
1097     return send_srw(c, sr);
1098 }
1099 #else
1100 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1101 {
1102     return zoom_complete;
1103 }
1104 #endif
1105
1106 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1107 {
1108     ZOOM_resultset r;
1109     int lslb, ssub, mspn;
1110     const char *syntax;
1111     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1112     Z_SearchRequest *search_req = apdu->u.searchRequest;
1113     const char *elementSetName;
1114     const char *smallSetElementSetName;
1115     const char *mediumSetElementSetName;
1116
1117     assert (c->tasks);
1118     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1119
1120     r = c->tasks->u.search.resultset;
1121
1122     elementSetName =
1123         ZOOM_options_get (r->options, "elementSetName");
1124     smallSetElementSetName  =
1125         ZOOM_options_get (r->options, "smallSetElementSetName");
1126     mediumSetElementSetName =
1127         ZOOM_options_get (r->options, "mediumSetElementSetName");
1128
1129     if (!smallSetElementSetName)
1130         smallSetElementSetName = elementSetName;
1131
1132     if (!mediumSetElementSetName)
1133         mediumSetElementSetName = elementSetName;
1134
1135     assert (r);
1136     assert (r->query);
1137
1138     /* prepare query for the search request */
1139     search_req->query = r->query->z_query;
1140
1141     search_req->databaseNames =
1142         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1143
1144     /* get syntax (no need to provide unless piggyback is in effect) */
1145     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1146
1147     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1148     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1149     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1150     if (lslb != -1 && ssub != -1 && mspn != -1)
1151     {
1152         /* So're a Z39.50 expert? Let's hope you don't do sort */
1153         *search_req->largeSetLowerBound = lslb;
1154         *search_req->smallSetUpperBound = ssub;
1155         *search_req->mediumSetPresentNumber = mspn;
1156     }
1157     else if (r->start == 0 && r->count > 0
1158              && r->piggyback && !r->r_sort_spec && !r->schema)
1159     {
1160         /* Regular piggyback - do it unless we're going to do sort */
1161         *search_req->largeSetLowerBound = 2000000000;
1162         *search_req->smallSetUpperBound = 0;
1163         *search_req->mediumSetPresentNumber = r->count;
1164         smallSetElementSetName = 0;
1165     }
1166     else
1167     {
1168         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1169         smallSetElementSetName = 0;
1170         mediumSetElementSetName = 0;
1171         syntax = 0;
1172     }
1173     if (smallSetElementSetName && *smallSetElementSetName)
1174     {
1175         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1176             odr_malloc (c->odr_out, sizeof(*esn));
1177
1178         esn->which = Z_ElementSetNames_generic;
1179         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1180         search_req->smallSetElementSetNames = esn;
1181     }
1182     if (mediumSetElementSetName && *mediumSetElementSetName)
1183     {
1184         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1185             odr_malloc (c->odr_out, sizeof(*esn));
1186
1187         esn->which = Z_ElementSetNames_generic;
1188         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1189         search_req->mediumSetElementSetNames = esn;
1190     }
1191     if (syntax)
1192         search_req->preferredRecordSyntax =
1193             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1194
1195     if (!r->setname)
1196     {
1197         if (c->support_named_resultsets)
1198         {
1199             char setname[14];
1200             int ord;
1201             /* find the lowest unused ordinal so that we re-use
1202                result sets on the server. */
1203             for (ord = 1; ; ord++)
1204             {
1205                 ZOOM_resultset rp;
1206                 sprintf (setname, "%d", ord);
1207                 for (rp = c->resultsets; rp; rp = rp->next)
1208                     if (rp->setname && !strcmp (rp->setname, setname))
1209                         break;
1210                 if (!rp)
1211                     break;
1212             }
1213             r->setname = xstrdup (setname);
1214             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1215         }
1216         else
1217             r->setname = xstrdup ("default");
1218         ZOOM_options_set (r->options, "setname", r->setname);
1219     }
1220     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1221     /* send search request */
1222     return send_APDU (c, apdu);
1223 }
1224
1225 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1226 {
1227     int oclass;
1228     Z_DefaultDiagFormat *r;
1229     char *addinfo = 0;
1230
1231     xfree (c->addinfo);
1232     c->addinfo = 0;
1233     if (p->which != Z_DiagRec_defaultFormat)
1234     {
1235         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1236         return;
1237     }
1238     r = p->u.defaultFormat;
1239     switch (r->which)
1240     {
1241     case Z_DefaultDiagFormat_v2Addinfo:
1242         addinfo = r->u.v2Addinfo;
1243         break;
1244     case Z_DefaultDiagFormat_v3Addinfo:
1245         addinfo = r->u.v3Addinfo;
1246         break;
1247     }
1248     set_dset_error(c, *r->condition,
1249                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1250                    addinfo, 0);
1251 }
1252
1253 ZOOM_API(ZOOM_record)
1254 ZOOM_record_clone (ZOOM_record srec)
1255 {
1256     char *buf;
1257     int size;
1258     ODR odr_enc;
1259     ZOOM_record nrec;
1260
1261     odr_enc = odr_createmem(ODR_ENCODE);
1262     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1263         return 0;
1264     buf = odr_getbuf (odr_enc, &size, 0);
1265
1266     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1267     nrec->odr = odr_createmem(ODR_DECODE);
1268     nrec->wrbuf_marc = 0;
1269     odr_setbuf (nrec->odr, buf, size, 0);
1270     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1271
1272     odr_destroy (odr_enc);
1273     return nrec;
1274 }
1275
1276 ZOOM_API(ZOOM_record)
1277 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1278 {
1279     return record_cache_lookup (s, pos);
1280 }
1281
1282 ZOOM_API(ZOOM_record)
1283 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1284 {
1285     ZOOM_resultset_retrieve (r, 1, pos, 1);
1286     return ZOOM_resultset_record_immediate (r, pos);
1287 }
1288
1289 ZOOM_API(void)
1290 ZOOM_record_destroy (ZOOM_record rec)
1291 {
1292     if (!rec)
1293         return;
1294     if (rec->wrbuf_marc)
1295         wrbuf_free (rec->wrbuf_marc, 1);
1296     odr_destroy (rec->odr);
1297     xfree (rec);
1298 }
1299
1300 ZOOM_API(const char *)
1301 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1302 {
1303     Z_NamePlusRecord *npr;
1304
1305     if (len)
1306         *len = 0; /* default return */
1307
1308     if (!rec)
1309         return 0;
1310     npr = rec->npr;
1311     if (!npr)
1312         return 0;
1313     if (!strcmp (type, "database"))
1314     {
1315         if (len)
1316             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1317         return npr->databaseName;
1318     }
1319     else if (!strcmp (type, "syntax"))
1320     {
1321         const char *desc = 0;
1322         if (npr->which == Z_NamePlusRecord_databaseRecord)
1323         {
1324             Z_External *r = (Z_External *) npr->u.databaseRecord;
1325             oident *ent = oid_getentbyoid(r->direct_reference);
1326             if (ent)
1327                 desc = ent->desc;
1328         }
1329         if (!desc)
1330             desc = "none";
1331         if (len)
1332             *len = strlen(desc);
1333         return desc;
1334     }
1335     else if (!strcmp (type, "render") &&
1336              npr->which == Z_NamePlusRecord_databaseRecord)
1337     {
1338         Z_External *r = (Z_External *) npr->u.databaseRecord;
1339         oident *ent = oid_getentbyoid(r->direct_reference);
1340
1341         if (r->which == Z_External_sutrs)
1342         {
1343             if (len) *len = r->u.sutrs->len;
1344             return (const char *) r->u.sutrs->buf;
1345         }
1346         else if (r->which == Z_External_octet)
1347         {
1348             yaz_marc_t mt;
1349             switch (ent->value)
1350             {
1351             case VAL_SOIF:
1352             case VAL_HTML:
1353             case VAL_SUTRS:
1354                 break;
1355             case VAL_TEXT_XML:
1356             case VAL_APPLICATION_XML:
1357                 break;
1358             default:
1359                 if (!rec->wrbuf_marc)
1360                     rec->wrbuf_marc = wrbuf_alloc();
1361
1362                 mt = yaz_marc_create();
1363                 wrbuf_rewind (rec->wrbuf_marc);
1364                 if (yaz_marc_decode_wrbuf (
1365                         mt, (const char *) r->u.octet_aligned->buf,
1366                         r->u.octet_aligned->len,
1367                         rec->wrbuf_marc) > 0)
1368                 {
1369                     if (len)
1370                         *len = wrbuf_len(rec->wrbuf_marc);
1371                     yaz_marc_destroy(mt);
1372                     return wrbuf_buf(rec->wrbuf_marc);
1373                 }
1374                 yaz_marc_destroy(mt);
1375             }
1376             if (len)
1377                 *len = r->u.octet_aligned->len;
1378             return (const char *) r->u.octet_aligned->buf;
1379         }
1380         else if (r->which == Z_External_grs1)
1381         {
1382             if (!rec->wrbuf_marc)
1383                 rec->wrbuf_marc = wrbuf_alloc();
1384             wrbuf_rewind (rec->wrbuf_marc);
1385             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1386             if (len)
1387                 *len = wrbuf_len(rec->wrbuf_marc);
1388             return wrbuf_buf(rec->wrbuf_marc);
1389         }
1390         return 0;
1391     }
1392     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1393              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1394     {
1395         Z_External *r = (Z_External *) npr->u.databaseRecord;
1396         oident *ent = oid_getentbyoid(r->direct_reference);
1397
1398         if (r->which == Z_External_sutrs)
1399         {
1400             if (len) *len = r->u.sutrs->len;
1401             return (const char *) r->u.sutrs->buf;
1402         }
1403         else if (r->which == Z_External_octet)
1404         {
1405             yaz_marc_t mt;
1406             int marc_decode_type = YAZ_MARC_MARCXML;
1407
1408             if (!strcmp(type, "oai"))
1409                 marc_decode_type = YAZ_MARC_OAIMARC;
1410             switch (ent->value)
1411             {
1412             case VAL_SOIF:
1413             case VAL_HTML:
1414             case VAL_SUTRS:
1415                 break;
1416             case VAL_TEXT_XML:
1417             case VAL_APPLICATION_XML:
1418                 break;
1419             default:
1420                 if (!rec->wrbuf_marc)
1421                     rec->wrbuf_marc = wrbuf_alloc();
1422                 wrbuf_rewind (rec->wrbuf_marc);
1423                 mt = yaz_marc_create();
1424
1425                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1426                 if (yaz_marc_decode_wrbuf (
1427                         mt, (const char *) r->u.octet_aligned->buf,
1428                         r->u.octet_aligned->len,
1429                         rec->wrbuf_marc) > 0)
1430                 {
1431                     if (len)
1432                         *len = wrbuf_len(rec->wrbuf_marc);
1433                     yaz_marc_destroy(mt);
1434                     return wrbuf_buf(rec->wrbuf_marc);
1435                 }
1436                 yaz_marc_destroy(mt);
1437             }
1438             if (len) *len = r->u.octet_aligned->len;
1439             return (const char *) r->u.octet_aligned->buf;
1440         }
1441         else if (r->which == Z_External_grs1)
1442         {
1443             if (len) *len = 5;
1444             return "GRS-1";
1445         }
1446         else if (r->which == Z_External_OPAC)
1447         {
1448             if (len) *len = 4;
1449             return "OPAC";
1450         }
1451         return 0;
1452     }
1453     else if (!strcmp (type, "raw"))
1454     {
1455         if (npr->which == Z_NamePlusRecord_databaseRecord)
1456         {
1457             Z_External *r = (Z_External *) npr->u.databaseRecord;
1458
1459             if (r->which == Z_External_sutrs)
1460             {
1461                 if (len) *len = r->u.sutrs->len;
1462                 return (const char *) r->u.sutrs->buf;
1463             }
1464             else if (r->which == Z_External_octet)
1465             {
1466                 if (len) *len = r->u.octet_aligned->len;
1467                 return (const char *) r->u.octet_aligned->buf;
1468             }
1469             else /* grs-1, explain, ... */
1470             {
1471                 if (len) *len = -1;
1472                 return (const char *) npr->u.databaseRecord;
1473             }
1474         }
1475         return 0;
1476     }
1477     else if (!strcmp (type, "ext"))
1478     {
1479         if (npr->which == Z_NamePlusRecord_databaseRecord)
1480             return (const char *) npr->u.databaseRecord;
1481         return 0;
1482     }
1483     return 0;
1484 }
1485
1486 static int strcmp_null(const char *v1, const char *v2)
1487 {
1488     if (!v1 && !v2)
1489         return 0;
1490     if (!v1 || !v2)
1491         return -1;
1492     return strcmp(v1, v2);
1493 }
1494
1495 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1496                               int pos)
1497 {
1498     ZOOM_record_cache rc;
1499     const char *elementSetName =
1500         ZOOM_resultset_option_get (r, "elementSetName");
1501     const char *syntax =
1502         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1503
1504     for (rc = r->record_cache; rc; rc = rc->next)
1505     {
1506         if (pos == rc->pos)
1507         {
1508             if (strcmp_null(r->schema, rc->schema))
1509                 continue;
1510             if (strcmp_null(elementSetName,rc->elementSetName))
1511                 continue;
1512             if (strcmp_null(syntax, rc->syntax))
1513                 continue;
1514             /* not destroying rc->npr (it's handled by nmem )*/
1515             rc->rec.npr = npr;
1516             /* keeping wrbuf_marc too */
1517             return;
1518         }
1519     }
1520     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1521     rc->rec.npr = npr;
1522     rc->rec.odr = 0;
1523     rc->rec.wrbuf_marc = 0;
1524     if (elementSetName)
1525         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1526     else
1527         rc->elementSetName = 0;
1528
1529     if (syntax)
1530         rc->syntax = odr_strdup (r->odr, syntax);
1531     else
1532         rc->syntax = 0;
1533
1534     if (r->schema)
1535         rc->schema = odr_strdup (r->odr, r->schema);
1536     else
1537         rc->schema = 0;
1538
1539     rc->pos = pos;
1540     rc->next = r->record_cache;
1541     r->record_cache = rc;
1542 }
1543
1544 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1545 {
1546     ZOOM_record_cache rc;
1547     const char *elementSetName =
1548         ZOOM_resultset_option_get (r, "elementSetName");
1549     const char *syntax =
1550         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1551
1552     for (rc = r->record_cache; rc; rc = rc->next)
1553     {
1554         if (pos == rc->pos)
1555         {
1556             if (strcmp_null(r->schema, rc->schema))
1557                 continue;
1558             if (strcmp_null(elementSetName,rc->elementSetName))
1559                 continue;
1560             if (strcmp_null(syntax, rc->syntax))
1561                 continue;
1562             return &rc->rec;
1563         }
1564     }
1565     return 0;
1566 }
1567
1568 static void handle_records (ZOOM_connection c, Z_Records *sr,
1569                             int present_phase)
1570 {
1571     ZOOM_resultset resultset;
1572
1573     if (!c->tasks)
1574         return ;
1575     switch (c->tasks->which)
1576     {
1577     case ZOOM_TASK_SEARCH:
1578         resultset = c->tasks->u.search.resultset;
1579         break;
1580     case ZOOM_TASK_RETRIEVE:
1581         resultset = c->tasks->u.retrieve.resultset;
1582         break;
1583     default:
1584         return;
1585     }
1586     if (sr && sr->which == Z_Records_NSD)
1587     {
1588         Z_DiagRec dr, *dr_p = &dr;
1589         dr.which = Z_DiagRec_defaultFormat;
1590         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1591
1592         response_diag (c, dr_p);
1593     }
1594     else if (sr && sr->which == Z_Records_multipleNSD)
1595     {
1596         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1597             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1598         else
1599             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1600     }
1601     else
1602     {
1603         if (resultset->count + resultset->start > resultset->size)
1604             resultset->count = resultset->size - resultset->start;
1605         if (resultset->count < 0)
1606             resultset->count = 0;
1607         if (sr && sr->which == Z_Records_DBOSD)
1608         {
1609             int i;
1610             NMEM nmem = odr_extract_mem (c->odr_in);
1611             Z_NamePlusRecordList *p =
1612                 sr->u.databaseOrSurDiagnostics;
1613             for (i = 0; i<p->num_records; i++)
1614             {
1615                 record_cache_add (resultset, p->records[i],
1616                                   i+ resultset->start);
1617             }
1618             /* transfer our response to search_nmem .. we need it later */
1619             nmem_transfer (resultset->odr->mem, nmem);
1620             nmem_destroy (nmem);
1621             if (present_phase && p->num_records == 0)
1622             {
1623                 /* present response and we didn't get any records! */
1624                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1625             }
1626         }
1627         else if (present_phase)
1628         {
1629             /* present response and we didn't get any records! */
1630             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1631         }
1632     }
1633 }
1634
1635 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1636 {
1637     handle_records (c, pr->records, 1);
1638 }
1639
1640 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1641 {
1642     ZOOM_resultset resultset;
1643
1644     yaz_log (LOG_DEBUG, "got search response");
1645
1646     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1647         return ;
1648
1649     resultset = c->tasks->u.search.resultset;
1650
1651     resultset->size = *sr->resultCount;
1652     handle_records (c, sr->records, 0);
1653 }
1654
1655 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1656 {
1657     if (res->diagnostics && res->num_diagnostics > 0)
1658         response_diag (c, res->diagnostics[0]);
1659 }
1660
1661 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1662 {
1663     NMEM nmem = odr_extract_mem (c->odr_in);
1664     ZOOM_scanset scan;
1665
1666     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1667         return 0;
1668     scan = c->tasks->u.scan.scan;
1669
1670     if (res->entries && res->entries->nonsurrogateDiagnostics)
1671         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1672     scan->scan_response = res;
1673     nmem_transfer (scan->odr->mem, nmem);
1674     if (res->stepSize)
1675         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1676     if (res->positionOfTerm)
1677         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1678     if (res->scanStatus)
1679         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1680     if (res->numberOfEntriesReturned)
1681         ZOOM_options_set_int (scan->options, "number",
1682                               *res->numberOfEntriesReturned);
1683     nmem_destroy (nmem);
1684     return 1;
1685 }
1686
1687 static zoom_ret send_sort (ZOOM_connection c)
1688 {
1689     ZOOM_resultset  resultset;
1690
1691     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1692         return zoom_complete;
1693
1694     resultset = c->tasks->u.search.resultset;
1695
1696     if (c->error)
1697     {
1698         resultset->r_sort_spec = 0;
1699         return zoom_complete;
1700     }
1701     if (resultset->r_sort_spec)
1702     {
1703         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1704         Z_SortRequest *req = apdu->u.sortRequest;
1705
1706         req->num_inputResultSetNames = 1;
1707         req->inputResultSetNames = (Z_InternationalString **)
1708             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1709         req->inputResultSetNames[0] =
1710             odr_strdup (c->odr_out, resultset->setname);
1711         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1712         req->sortSequence = resultset->r_sort_spec;
1713         resultset->r_sort_spec = 0;
1714         return send_APDU (c, apdu);
1715     }
1716     return zoom_complete;
1717 }
1718
1719 static zoom_ret send_present (ZOOM_connection c)
1720 {
1721     Z_APDU *apdu = 0;
1722     Z_PresentRequest *req = 0;
1723     int i = 0;
1724     const char *syntax = 0;
1725     const char *elementSetName = 0;
1726     ZOOM_resultset  resultset;
1727
1728     if (!c->tasks)
1729         return zoom_complete;
1730
1731     switch (c->tasks->which)
1732     {
1733     case ZOOM_TASK_SEARCH:
1734         resultset = c->tasks->u.search.resultset;
1735         break;
1736     case ZOOM_TASK_RETRIEVE:
1737         resultset = c->tasks->u.retrieve.resultset;
1738         resultset->start = c->tasks->u.retrieve.start;
1739         resultset->count = c->tasks->u.retrieve.count;
1740
1741         if (resultset->start >= resultset->size)
1742             return zoom_complete;
1743         if (resultset->start + resultset->count > resultset->size)
1744             resultset->count = resultset->size - resultset->start;
1745         break;
1746     default:
1747         return zoom_complete;
1748     }
1749
1750     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1751     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1752
1753     if (c->error)                  /* don't continue on error */
1754         return zoom_complete;
1755     if (resultset->start < 0)
1756         return zoom_complete;
1757     for (i = 0; i<resultset->count; i++)
1758     {
1759         ZOOM_record rec =
1760             record_cache_lookup (resultset, i + resultset->start);
1761         if (!rec)
1762             break;
1763     }
1764     if (i == resultset->count)
1765         return zoom_complete;
1766
1767     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1768     req = apdu->u.presentRequest;
1769
1770     resultset->start += i;
1771     resultset->count -= i;
1772     *req->resultSetStartPoint = resultset->start + 1;
1773     *req->numberOfRecordsRequested = resultset->count;
1774     assert (*req->numberOfRecordsRequested > 0);
1775
1776     if (syntax && *syntax)
1777         req->preferredRecordSyntax =
1778             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1779
1780     if (resultset->schema && *resultset->schema)
1781     {
1782         Z_RecordComposition *compo = (Z_RecordComposition *)
1783             odr_malloc (c->odr_out, sizeof(*compo));
1784
1785         req->recordComposition = compo;
1786         compo->which = Z_RecordComp_complex;
1787         compo->u.complex = (Z_CompSpec *)
1788             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1789         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1790             odr_malloc(c->odr_out, sizeof(bool_t));
1791         *compo->u.complex->selectAlternativeSyntax = 0;
1792
1793         compo->u.complex->generic = (Z_Specification *)
1794             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1795
1796         compo->u.complex->generic->which = Z_Schema_oid;
1797         compo->u.complex->generic->schema.oid = (Odr_oid *)
1798             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1799
1800         if (!compo->u.complex->generic->schema.oid)
1801         {
1802             /* OID wasn't a schema! Try record syntax instead. */
1803
1804             compo->u.complex->generic->schema.oid = (Odr_oid *)
1805                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1806         }
1807         if (elementSetName && *elementSetName)
1808         {
1809             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1810                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1811             compo->u.complex->generic->elementSpec->which =
1812                 Z_ElementSpec_elementSetName;
1813             compo->u.complex->generic->elementSpec->u.elementSetName =
1814                 odr_strdup (c->odr_out, elementSetName);
1815         }
1816         else
1817             compo->u.complex->generic->elementSpec = 0;
1818         compo->u.complex->num_dbSpecific = 0;
1819         compo->u.complex->dbSpecific = 0;
1820         compo->u.complex->num_recordSyntax = 0;
1821         compo->u.complex->recordSyntax = 0;
1822     }
1823     else if (elementSetName && *elementSetName)
1824     {
1825         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1826             odr_malloc (c->odr_out, sizeof(*esn));
1827         Z_RecordComposition *compo = (Z_RecordComposition *)
1828             odr_malloc (c->odr_out, sizeof(*compo));
1829
1830         esn->which = Z_ElementSetNames_generic;
1831         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1832         compo->which = Z_RecordComp_simple;
1833         compo->u.simple = esn;
1834         req->recordComposition = compo;
1835     }
1836     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1837     return send_APDU (c, apdu);
1838 }
1839
1840 ZOOM_API(ZOOM_scanset)
1841 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1842 {
1843     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1844
1845     scan->connection = c;
1846     scan->odr = odr_createmem (ODR_DECODE);
1847     scan->options = ZOOM_options_create_with_parent (c->options);
1848     scan->refcount = 1;
1849     scan->scan_response = 0;
1850
1851     if ((scan->termListAndStartPoint =
1852          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1853                       start)))
1854     {
1855         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1856         task->u.scan.scan = scan;
1857
1858         (scan->refcount)++;
1859         if (!c->async)
1860         {
1861             while (ZOOM_event (1, &c))
1862                 ;
1863         }
1864     }
1865     return scan;
1866 }
1867
1868 ZOOM_API(void)
1869 ZOOM_scanset_destroy (ZOOM_scanset scan)
1870 {
1871     if (!scan)
1872         return;
1873     (scan->refcount)--;
1874     if (scan->refcount == 0)
1875     {
1876         odr_destroy (scan->odr);
1877
1878         ZOOM_options_destroy (scan->options);
1879         xfree (scan);
1880     }
1881 }
1882
1883 static zoom_ret send_package (ZOOM_connection c)
1884 {
1885     ZOOM_Event event;
1886     if (!c->tasks)
1887         return zoom_complete;
1888     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1889
1890     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1891     ZOOM_connection_put_event (c, event);
1892
1893     return do_write_ex (c, c->tasks->u.package->buf_out,
1894                         c->tasks->u.package->len_out);
1895 }
1896
1897 static zoom_ret send_scan (ZOOM_connection c)
1898 {
1899     ZOOM_scanset scan;
1900     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1901     Z_ScanRequest *req = apdu->u.scanRequest;
1902     if (!c->tasks)
1903         return zoom_complete;
1904     assert (c->tasks->which == ZOOM_TASK_SCAN);
1905     scan = c->tasks->u.scan.scan;
1906
1907     req->termListAndStartPoint = scan->termListAndStartPoint;
1908     req->attributeSet = scan->attributeSet;
1909
1910     *req->numberOfTermsRequested =
1911         ZOOM_options_get_int(scan->options, "number", 10);
1912
1913     req->preferredPositionInResponse =
1914         odr_intdup (c->odr_out,
1915                     ZOOM_options_get_int(scan->options, "position", 1));
1916
1917     req->stepSize =
1918         odr_intdup (c->odr_out,
1919                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1920
1921     req->databaseNames = set_DatabaseNames (c, scan->options,
1922                                             &req->num_databaseNames);
1923
1924     return send_APDU (c, apdu);
1925 }
1926
1927 ZOOM_API(size_t)
1928 ZOOM_scanset_size (ZOOM_scanset scan)
1929 {
1930     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1931         return 0;
1932     return scan->scan_response->entries->num_entries;
1933 }
1934
1935 ZOOM_API(const char *)
1936 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1937                                int *occ, int *len)
1938 {
1939     const char *term = 0;
1940     size_t noent = ZOOM_scanset_size (scan);
1941     Z_ScanResponse *res = scan->scan_response;
1942
1943     *len = 0;
1944     *occ = 0;
1945     if (pos >= noent)
1946         return 0;
1947     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1948     {
1949         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1950
1951         if (t->term->which == Z_Term_general)
1952         {
1953             term = (const char *) t->term->u.general->buf;
1954             *len = t->term->u.general->len;
1955         }
1956         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1957     }
1958     return term;
1959 }
1960
1961 ZOOM_API(const char *)
1962 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1963 {
1964     return ZOOM_options_get (scan->options, key);
1965 }
1966
1967 ZOOM_API(void)
1968 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1969                               const char *val)
1970 {
1971     ZOOM_options_set (scan->options, key, val);
1972 }
1973
1974 static Z_APDU *create_es_package (ZOOM_package p, int type)
1975 {
1976     const char *str;
1977     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1978     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1979
1980     *req->function = Z_ExtendedServicesRequest_create;
1981
1982     str = ZOOM_options_get(p->options, "package-name");
1983     if (str && *str)
1984         req->packageName = nmem_strdup (p->odr_out->mem, str);
1985
1986     str = ZOOM_options_get(p->options, "user-id");
1987     if (str)
1988         req->userId = nmem_strdup (p->odr_out->mem, str);
1989
1990     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1991                                               type);
1992
1993     str = ZOOM_options_get(p->options, "function");
1994     if (str)
1995     {
1996         if (!strcmp (str, "create"))
1997             *req->function = 1;
1998         if (!strcmp (str, "delete"))
1999             *req->function = 2;
2000         if (!strcmp (str, "modify"))
2001             *req->function = 3;
2002     }
2003     return apdu;
2004 }
2005
2006 static const char *ill_array_lookup (void *clientData, const char *idx)
2007 {
2008     ZOOM_package p = (ZOOM_package) clientData;
2009     return ZOOM_options_get (p->options, idx+4);
2010 }
2011
2012 static Z_External *encode_ill_request (ZOOM_package p)
2013 {
2014     ODR out = p->odr_out;
2015     ILL_Request *req;
2016     Z_External *r = 0;
2017     struct ill_get_ctl ctl;
2018
2019     ctl.odr = p->odr_out;
2020     ctl.clientData = p;
2021     ctl.f = ill_array_lookup;
2022
2023     req = ill_get_ILLRequest(&ctl, "ill", 0);
2024
2025     if (!ill_Request (out, &req, 0, 0))
2026     {
2027         int ill_request_size;
2028         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2029         if (ill_request_buf)
2030             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2031         return 0;
2032     }
2033     else
2034     {
2035         oident oid;
2036         int illRequest_size = 0;
2037         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2038
2039         oid.proto = PROTO_GENERAL;
2040         oid.oclass = CLASS_GENERAL;
2041         oid.value = VAL_ISO_ILL_1;
2042
2043         r = (Z_External *) odr_malloc (out, sizeof(*r));
2044         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2045         r->indirect_reference = 0;
2046         r->descriptor = 0;
2047         r->which = Z_External_single;
2048
2049         r->u.single_ASN1_type = (Odr_oct *)
2050             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2051         r->u.single_ASN1_type->buf = (unsigned char*)
2052             odr_malloc (out, illRequest_size);
2053         r->u.single_ASN1_type->len = illRequest_size;
2054         r->u.single_ASN1_type->size = illRequest_size;
2055         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2056     }
2057     return r;
2058 }
2059
2060 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2061 {
2062     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2063     const char *str;
2064
2065     req->which=Z_IOItemOrder_esRequest;
2066     req->u.esRequest = (Z_IORequest *)
2067         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2068
2069     /* to keep part ... */
2070     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2071         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2072     req->u.esRequest->toKeep->supplDescription = 0;
2073     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2074         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2075
2076     str = ZOOM_options_get(p->options, "contact-name");
2077     req->u.esRequest->toKeep->contact->name = str ?
2078         nmem_strdup (p->odr_out->mem, str) : 0;
2079
2080     str = ZOOM_options_get(p->options, "contact-phone");
2081     req->u.esRequest->toKeep->contact->phone = str ?
2082         nmem_strdup (p->odr_out->mem, str) : 0;
2083
2084     str = ZOOM_options_get(p->options, "contact-email");
2085     req->u.esRequest->toKeep->contact->email = str ?
2086         nmem_strdup (p->odr_out->mem, str) : 0;
2087
2088     req->u.esRequest->toKeep->addlBilling = 0;
2089
2090     /* not to keep part ... */
2091     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2092         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2093
2094     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2095         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2096
2097     str = ZOOM_options_get(p->options, "itemorder-setname");
2098     if (!str)
2099         str = "default";
2100     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2101         nmem_strdup (p->odr_out->mem, str);
2102     req->u.esRequest->notToKeep->resultSetItem->item =
2103         (int *) odr_malloc(p->odr_out, sizeof(int));
2104
2105     str = ZOOM_options_get(p->options, "itemorder-item");
2106     *req->u.esRequest->notToKeep->resultSetItem->item =
2107         (str ? atoi(str) : 1);
2108
2109     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2110
2111     return req;
2112 }
2113
2114 ZOOM_API(void)
2115     ZOOM_package_send (ZOOM_package p, const char *type)
2116 {
2117     Z_APDU *apdu = 0;
2118     ZOOM_connection c;
2119     if (!p)
2120         return;
2121     c = p->connection;
2122     odr_reset (p->odr_out);
2123     xfree (p->buf_out);
2124     p->buf_out = 0;
2125     if (!strcmp(type, "itemorder"))
2126     {
2127         Z_External *r;
2128         apdu = create_es_package (p, VAL_ITEMORDER);
2129         if (apdu)
2130         {
2131             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2132
2133             r->direct_reference =
2134                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2135                                        VAL_ITEMORDER);
2136             r->descriptor = 0;
2137             r->which = Z_External_itemOrder;
2138             r->indirect_reference = 0;
2139             r->u.itemOrder = encode_item_order (p);
2140
2141             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2142         }
2143     }
2144     if (apdu)
2145     {
2146         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2147         {
2148             char *buf;
2149
2150             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2151             task->u.package = p;
2152             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2153             p->buf_out = (char *) xmalloc (p->len_out);
2154             memcpy (p->buf_out, buf, p->len_out);
2155
2156             (p->refcount)++;
2157             if (!c->async)
2158             {
2159                 while (ZOOM_event (1, &c))
2160                     ;
2161             }
2162         }
2163     }
2164 }
2165
2166 ZOOM_API(ZOOM_package)
2167     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2168 {
2169     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2170
2171     p->connection = c;
2172     p->odr_out = odr_createmem (ODR_ENCODE);
2173     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2174     p->refcount = 1;
2175     p->buf_out = 0;
2176     p->len_out = 0;
2177     return p;
2178 }
2179
2180 ZOOM_API(void)
2181     ZOOM_package_destroy(ZOOM_package p)
2182 {
2183     if (!p)
2184         return;
2185     (p->refcount)--;
2186     if (p->refcount == 0)
2187     {
2188         odr_destroy (p->odr_out);
2189         xfree (p->buf_out);
2190
2191         ZOOM_options_destroy (p->options);
2192         xfree (p);
2193     }
2194 }
2195
2196 ZOOM_API(const char *)
2197 ZOOM_package_option_get (ZOOM_package p, const char *key)
2198 {
2199     return ZOOM_options_get (p->options, key);
2200 }
2201
2202
2203 ZOOM_API(void)
2204 ZOOM_package_option_set (ZOOM_package p, const char *key,
2205                               const char *val)
2206 {
2207     ZOOM_options_set (p->options, key, val);
2208 }
2209
2210 static int ZOOM_connection_exec_task (ZOOM_connection c)
2211 {
2212     ZOOM_task task = c->tasks;
2213     zoom_ret ret = zoom_complete;
2214
2215     if (!task)
2216     {
2217         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2218         return 0;
2219     }
2220     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2221              task->which, task->running);
2222     if (c->error != ZOOM_ERROR_NONE)
2223     {
2224         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2225         ZOOM_connection_remove_tasks (c);
2226         return 0;
2227     }
2228     if (task->running)
2229     {
2230         yaz_log (LOG_DEBUG, "task already running");
2231         return 0;
2232     }
2233     task->running = 1;
2234     ret = zoom_complete;
2235     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2236     {
2237         switch (task->which)
2238         {
2239         case ZOOM_TASK_SEARCH:
2240             if (c->proto == PROTO_HTTP)
2241                 ret = ZOOM_connection_srw_send_search(c);
2242             else
2243                 ret = ZOOM_connection_send_search(c);
2244             break;
2245         case ZOOM_TASK_RETRIEVE:
2246             if (c->proto == PROTO_HTTP)
2247                 ret = ZOOM_connection_srw_send_search(c);
2248             else
2249                 ret = send_present (c);
2250             break;
2251         case ZOOM_TASK_CONNECT:
2252             ret = do_connect(c);
2253             break;
2254         case ZOOM_TASK_SCAN:
2255             ret = send_scan(c);
2256             break;
2257         case ZOOM_TASK_PACKAGE:
2258             ret = send_package(c);
2259             break;
2260         }
2261     }
2262     else
2263     {
2264         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2265         ZOOM_connection_remove_tasks (c);
2266     }
2267     if (ret == zoom_complete)
2268     {
2269         yaz_log (LOG_DEBUG, "task removed (complete)");
2270         ZOOM_connection_remove_task (c);
2271         return 0;
2272     }
2273     yaz_log (LOG_DEBUG, "task pending");
2274     return 1;
2275 }
2276
2277 static zoom_ret send_sort_present (ZOOM_connection c)
2278 {
2279     zoom_ret r = send_sort (c);
2280     if (r == zoom_complete)
2281         r = send_present (c);
2282     return r;
2283 }
2284
2285 static int es_response (ZOOM_connection c,
2286                         Z_ExtendedServicesResponse *res)
2287 {
2288     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2289         return 0;
2290     if (res->diagnostics && res->num_diagnostics > 0)
2291         response_diag(c, res->diagnostics[0]);
2292     if (res->taskPackage &&
2293         res->taskPackage->which == Z_External_extendedService)
2294     {
2295         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2296         Odr_oct *id = taskPackage->targetReference;
2297
2298         if (id)
2299             ZOOM_options_setl (c->tasks->u.package->options,
2300                                "targetReference", (char*) id->buf, id->len);
2301     }
2302     return 1;
2303 }
2304
2305
2306 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2307 {
2308     Z_InitResponse *initrs;
2309
2310     c->mask = 0;
2311     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2312     switch(apdu->which)
2313     {
2314     case Z_APDU_initResponse:
2315         initrs = apdu->u.initResponse;
2316         ZOOM_connection_option_set(c, "targetImplementationId",
2317                                    initrs->implementationId ?
2318                                    initrs->implementationId : "");
2319         ZOOM_connection_option_set(c, "targetImplementationName",
2320                                    initrs->implementationName ?
2321                                    initrs->implementationName : "");
2322         ZOOM_connection_option_set(c, "targetImplementationVersion",
2323                                    initrs->implementationVersion ?
2324                                    initrs->implementationVersion : "");
2325         if (!*initrs->result)
2326         {
2327             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2328         }
2329         else
2330         {
2331             char *cookie =
2332                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2333                                           VAL_COOKIE, 1, 0);
2334             xfree (c->cookie_in);
2335             c->cookie_in = 0;
2336             if (cookie)
2337                 c->cookie_in = xstrdup(cookie);
2338             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2339                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2340                 c->support_named_resultsets = 1;
2341             if (c->tasks)
2342             {
2343                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2344                 ZOOM_connection_remove_task (c);
2345             }
2346             ZOOM_connection_exec_task (c);
2347         }
2348         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2349         {
2350             NMEM tmpmem = nmem_create();
2351             Z_CharSetandLanguageNegotiation *p =
2352                 yaz_get_charneg_record(initrs->otherInfo);
2353
2354             if (p)
2355             {
2356                 char *charset=NULL, *lang=NULL;
2357                 int sel;
2358
2359                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2360                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2361                         "language %s, select %d",
2362                         charset ? charset : "none", lang ? lang : "none", sel);
2363                 if (charset)
2364                     ZOOM_connection_option_set (c, "negotiation-charset",
2365                                                 charset);
2366                 if (lang)
2367                     ZOOM_connection_option_set (c, "negotiation-lang",
2368                                                 lang);
2369                 nmem_destroy(tmpmem);
2370             }
2371         }
2372         break;
2373     case Z_APDU_searchResponse:
2374         handle_search_response (c, apdu->u.searchResponse);
2375         if (send_sort_present (c) == zoom_complete)
2376             ZOOM_connection_remove_task (c);
2377         break;
2378     case Z_APDU_presentResponse:
2379         handle_present_response (c, apdu->u.presentResponse);
2380         if (send_present (c) == zoom_complete)
2381             ZOOM_connection_remove_task (c);
2382         break;
2383     case Z_APDU_sortResponse:
2384         sort_response (c, apdu->u.sortResponse);
2385         if (send_present (c) == zoom_complete)
2386             ZOOM_connection_remove_task (c);
2387         break;
2388     case Z_APDU_scanResponse:
2389         scan_response (c, apdu->u.scanResponse);
2390         ZOOM_connection_remove_task (c);
2391         break;
2392     case Z_APDU_extendedServicesResponse:
2393         es_response (c, apdu->u.extendedServicesResponse);
2394         ZOOM_connection_remove_task (c);
2395         break;
2396     case Z_APDU_close:
2397         if (c->reconnect_ok)
2398         {
2399             do_close(c);
2400             c->tasks->running = 0;
2401             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2402         }
2403         else
2404         {
2405             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2406             do_close(c);
2407         }
2408         break;
2409     default:
2410         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2411         do_close(c);
2412     }
2413 }
2414
2415 #if HAVE_XML2
2416 static void handle_srw_response(ZOOM_connection c,
2417                                 Z_SRW_searchRetrieveResponse *res)
2418 {
2419     ZOOM_resultset resultset = 0;
2420     int i;
2421     NMEM nmem;
2422
2423     if (!c->tasks)
2424         return;
2425
2426     if (c->tasks->which == ZOOM_TASK_SEARCH)
2427         resultset = c->tasks->u.search.resultset;
2428     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2429         resultset = c->tasks->u.retrieve.resultset;
2430     else
2431         return ;
2432
2433     resultset->size = 0;
2434
2435     yaz_log(LOG_DEBUG, "got SRW response OK");
2436
2437     if (res->numberOfRecords)
2438         resultset->size = *res->numberOfRecords;
2439
2440     for (i = 0; i<res->num_records; i++)
2441     {
2442         int pos;
2443
2444         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2445             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2446
2447         if (res->records[i].recordPosition &&
2448             *res->records[i].recordPosition > 0)
2449             pos = *res->records[i].recordPosition - 1;
2450         else
2451             pos = resultset->start + i;
2452
2453         npr->databaseName = 0;
2454         npr->which = Z_NamePlusRecord_databaseRecord;
2455         npr->u.databaseRecord = (Z_External *)
2456             odr_malloc(c->odr_in, sizeof(Z_External));
2457         npr->u.databaseRecord->descriptor = 0;
2458         npr->u.databaseRecord->direct_reference =
2459             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2460         npr->u.databaseRecord->which = Z_External_octet;
2461         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2462             odr_malloc(c->odr_in, sizeof(Odr_oct));
2463         npr->u.databaseRecord->u.octet_aligned->buf =
2464             res->records[i].recordData_buf;
2465         npr->u.databaseRecord->u.octet_aligned->len =
2466             npr->u.databaseRecord->u.octet_aligned->size =
2467             res->records[i].recordData_len;
2468         record_cache_add (resultset, npr, pos);
2469     }
2470     if (res->num_diagnostics > 0)
2471     {
2472         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2473                        res->diagnostics[0].details, 0);
2474     }
2475     nmem = odr_extract_mem(c->odr_in);
2476     nmem_transfer(resultset->odr->mem, nmem);
2477     nmem_destroy(nmem);
2478 }
2479 #endif
2480
2481 #if HAVE_XML2
2482 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2483 {
2484     int ret = -1;
2485     const char *content_type = z_HTTP_header_lookup(hres->headers,
2486                                                     "Content-Type");
2487     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2488                                                        "Connection");
2489     c->mask = 0;
2490     yaz_log (LOG_DEBUG, "handle_http");
2491
2492     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2493     {
2494         Z_SOAP *soap_package = 0;
2495         ODR o = odr_createmem(ODR_DECODE);
2496         Z_SOAP_Handler soap_handlers[2] = {
2497             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2498              (Z_SOAP_fun) yaz_srw_codec},
2499             {0, 0, 0}
2500         };
2501         ret = z_soap_codec(o, &soap_package,
2502                            &hres->content_buf, &hres->content_len,
2503                            soap_handlers);
2504         if (!ret && soap_package->which == Z_SOAP_generic &&
2505             soap_package->u.generic->no == 0)
2506         {
2507             Z_SRW_PDU *sr = soap_package->u.generic->p;
2508             if (sr->which == Z_SRW_searchRetrieve_response)
2509                 handle_srw_response(c, sr->u.response);
2510             else
2511                 ret = -1;
2512         }
2513         else if (!ret && (soap_package->which == Z_SOAP_fault
2514                           || soap_package->which == Z_SOAP_error))
2515         {
2516             set_HTTP_error(c, hres->code,
2517                            soap_package->u.fault->fault_code,
2518                            soap_package->u.fault->fault_string);
2519         }
2520         else
2521             ret = -1;
2522         odr_destroy(o);
2523     }
2524     if (ret)
2525     {
2526         if (hres->code != 200)
2527             set_HTTP_error(c, hres->code, 0, 0);
2528         else
2529             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2530         do_close (c);
2531     }
2532     ZOOM_connection_remove_task(c);
2533     if (!strcmp(hres->version, "1.0"))
2534     {
2535         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2536         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2537             do_close(c);
2538     }
2539     else
2540     {
2541         /* HTTP 1.1: only if no close we stay alive .. */
2542         if (connection_head && !strcmp(connection_head, "close"))
2543             do_close(c);
2544     }
2545 }
2546 #endif
2547
2548 static int do_read (ZOOM_connection c)
2549 {
2550     int r;
2551     ZOOM_Event event;
2552
2553     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2554     ZOOM_connection_put_event (c, event);
2555
2556     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2557
2558     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2559     if (r == 1)
2560         return 0;
2561     if (r <= 0)
2562     {
2563         if (c->reconnect_ok)
2564         {
2565             do_close (c);
2566             c->reconnect_ok = 0;
2567             yaz_log (LOG_DEBUG, "reconnect read");
2568             c->tasks->running = 0;
2569             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2570         }
2571         else
2572         {
2573             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2574             do_close (c);
2575         }
2576     }
2577     else
2578     {
2579         Z_GDU *gdu;
2580         ZOOM_Event event;
2581         odr_reset (c->odr_in);
2582         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2583         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2584         ZOOM_connection_put_event (c, event);
2585
2586         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2587         {
2588             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2589             do_close (c);
2590         }
2591         else if (gdu->which == Z_GDU_Z3950)
2592             handle_apdu (c, gdu->u.z3950);
2593         else if (gdu->which == Z_GDU_HTTP_Response)
2594         {
2595 #if HAVE_XML2
2596             handle_http (c, gdu->u.HTTP_Response);
2597 #else
2598             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2599             do_close (c);
2600 #endif
2601         }
2602         c->reconnect_ok = 0;
2603     }
2604     return 1;
2605 }
2606
2607 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2608 {
2609     int r;
2610     ZOOM_Event event;
2611
2612     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2613     ZOOM_connection_put_event (c, event);
2614
2615     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2616     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2617     {
2618         if (c->reconnect_ok)
2619         {
2620             do_close (c);
2621             c->reconnect_ok = 0;
2622             yaz_log (LOG_DEBUG, "reconnect write");
2623             c->tasks->running = 0;
2624             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2625             return zoom_pending;
2626         }
2627         if (c->state == STATE_CONNECTING)
2628             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2629         else
2630             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2631         do_close (c);
2632         return zoom_complete;
2633     }
2634     else if (r == 1)
2635     {
2636         c->mask = ZOOM_SELECT_EXCEPT;
2637         if (c->cs->io_pending & CS_WANT_WRITE)
2638             c->mask += ZOOM_SELECT_WRITE;
2639         if (c->cs->io_pending & CS_WANT_READ)
2640             c->mask += ZOOM_SELECT_READ;
2641         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2642     }
2643     else
2644     {
2645         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2646         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2647     }
2648     return zoom_pending;
2649 }
2650
2651 static zoom_ret do_write(ZOOM_connection c)
2652 {
2653     return do_write_ex (c, c->buf_out, c->len_out);
2654 }
2655
2656
2657 ZOOM_API(const char *)
2658 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2659 {
2660     return ZOOM_options_get (c->options, key);
2661 }
2662
2663 ZOOM_API(void)
2664 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2665                                   const char *val)
2666 {
2667     ZOOM_options_set (c->options, key, val);
2668 }
2669
2670 ZOOM_API(const char *)
2671 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2672 {
2673     return ZOOM_options_get (r->options, key);
2674 }
2675
2676 ZOOM_API(void)
2677 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2678                                   const char *val)
2679 {
2680     ZOOM_options_set (r->options, key, val);
2681 }
2682
2683
2684 ZOOM_API(int)
2685 ZOOM_connection_errcode (ZOOM_connection c)
2686 {
2687     return ZOOM_connection_error (c, 0, 0);
2688 }
2689
2690 ZOOM_API(const char *)
2691 ZOOM_connection_errmsg (ZOOM_connection c)
2692 {
2693     const char *msg;
2694     ZOOM_connection_error (c, &msg, 0);
2695     return msg;
2696 }
2697
2698 ZOOM_API(const char *)
2699 ZOOM_connection_addinfo (ZOOM_connection c)
2700 {
2701     const char *addinfo;
2702     ZOOM_connection_error (c, 0, &addinfo);
2703     return addinfo;
2704 }
2705
2706 ZOOM_API(const char *)
2707 ZOOM_diag_str (int error)
2708 {
2709     switch (error)
2710     {
2711     case ZOOM_ERROR_NONE:
2712         return "No error";
2713     case ZOOM_ERROR_CONNECT:
2714         return "Connect failed";
2715     case ZOOM_ERROR_MEMORY:
2716         return "Out of memory";
2717     case ZOOM_ERROR_ENCODE:
2718         return "Encoding failed";
2719     case ZOOM_ERROR_DECODE:
2720         return "Decoding failed";
2721     case ZOOM_ERROR_CONNECTION_LOST:
2722         return "Connection lost";
2723     case ZOOM_ERROR_INIT:
2724         return "Init rejected";
2725     case ZOOM_ERROR_INTERNAL:
2726         return "Internal failure";
2727     case ZOOM_ERROR_TIMEOUT:
2728         return "Timeout";
2729     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2730         return "Unsupported protocol";
2731     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2732         return "Unsupported query type";
2733     default:
2734         return diagbib1_str (error);
2735     }
2736 }
2737
2738 ZOOM_API(int)
2739 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2740                          const char **addinfo, const char **diagset)
2741 {
2742     int error = c->error;
2743     if (cp)
2744     {
2745         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2746             *cp = ZOOM_diag_str(error);
2747         else if (!strcmp(c->diagset, "HTTP"))
2748             *cp = z_HTTP_errmsg(c->error);
2749         else if (!strcmp(c->diagset, "Bib-1"))
2750             *cp = ZOOM_diag_str(error);
2751         else if (!strcmp(c->diagset, "SRW"))
2752             *cp = yaz_diag_srw_str(c->error);
2753         else
2754             *cp = "Unknown error and diagnostic set";
2755     }
2756     if (addinfo)
2757         *addinfo = c->addinfo ? c->addinfo : "";
2758     if (diagset)
2759         *diagset = c->diagset ? c->diagset : "";
2760     return c->error;
2761 }
2762
2763 ZOOM_API(int)
2764 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2765                        const char **addinfo)
2766 {
2767     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2768 }
2769
2770 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2771 {
2772     ZOOM_Event event = 0;
2773     int r = cs_look(c->cs);
2774     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2775              c, mask, r);
2776
2777     if (r == CS_NONE)
2778     {
2779         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2780         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2781         do_close (c);
2782         ZOOM_connection_put_event (c, event);
2783     }
2784     else if (r == CS_CONNECT)
2785     {
2786         int ret;
2787         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2788
2789         ret = cs_rcvconnect (c->cs);
2790         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2791         if (ret == 1)
2792         {
2793             c->mask = ZOOM_SELECT_EXCEPT;
2794             if (c->cs->io_pending & CS_WANT_WRITE)
2795                 c->mask += ZOOM_SELECT_WRITE;
2796             if (c->cs->io_pending & CS_WANT_READ)
2797                 c->mask += ZOOM_SELECT_READ;
2798             ZOOM_connection_put_event (c, event);
2799         }
2800         else if (ret == 0)
2801         {
2802             ZOOM_connection_put_event (c, event);
2803             if (c->proto == PROTO_Z3950)
2804                 ZOOM_connection_send_init(c);
2805             else
2806             {
2807                 /* no init request for SRW .. */
2808                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2809                 ZOOM_connection_remove_task (c);
2810                 c->mask = 0;
2811                 ZOOM_connection_exec_task (c);
2812             }
2813             c->state = STATE_ESTABLISHED;
2814         }
2815         else
2816         {
2817             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2818             do_close (c);
2819             ZOOM_connection_put_event (c, event);
2820         }
2821     }
2822     else
2823     {
2824         if (mask & ZOOM_SELECT_READ)
2825             do_read (c);
2826         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2827             do_write (c);
2828     }
2829     return 1;
2830 }
2831
2832 ZOOM_API(int)
2833 ZOOM_connection_last_event(ZOOM_connection cs)
2834 {
2835     if (!cs)
2836         return ZOOM_EVENT_NONE;
2837     return cs->last_event;
2838 }
2839
2840 ZOOM_API(int)
2841 ZOOM_event (int no, ZOOM_connection *cs)
2842 {
2843     int timeout = 5000;
2844 #if HAVE_SYS_POLL_H
2845     struct pollfd pollfds[1024];
2846     ZOOM_connection poll_cs[1024];
2847 #else
2848     struct timeval tv;
2849     fd_set input, output, except;
2850 #endif
2851     int i, r, nfds;
2852     int max_fd = 0;
2853
2854     for (i = 0; i<no; i++)
2855     {
2856         ZOOM_connection c = cs[i];
2857         ZOOM_Event event;
2858         if (c && (event = ZOOM_connection_get_event(c)))
2859         {
2860             ZOOM_Event_destroy (event);
2861             return i+1;
2862         }
2863     }
2864     for (i = 0; i<no; i++)
2865     {
2866         ZOOM_connection c = cs[i];
2867         ZOOM_Event event;
2868         if (c && ZOOM_connection_exec_task (c))
2869         {
2870             if ((event = ZOOM_connection_get_event(c)))
2871             {
2872                 ZOOM_Event_destroy (event);
2873                 return i+1;
2874             }
2875         }
2876     }
2877 #if HAVE_SYS_POLL_H
2878
2879 #else
2880     FD_ZERO (&input);
2881     FD_ZERO (&output);
2882     FD_ZERO (&except);
2883 #endif
2884     nfds = 0;
2885     for (i = 0; i<no; i++)
2886     {
2887         ZOOM_connection c = cs[i];
2888         int fd, mask;
2889         int this_timeout;
2890
2891         if (!c)
2892             continue;
2893         fd = z3950_connection_socket(c);
2894         mask = z3950_connection_mask(c);
2895
2896         if (fd == -1)
2897             continue;
2898         if (max_fd < fd)
2899             max_fd = fd;
2900
2901         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2902         if (this_timeout != -1 && this_timeout < timeout)
2903             timeout = this_timeout;
2904 #if HAVE_SYS_POLL_H
2905         if (mask)
2906         {
2907             short poll_events = 0;
2908
2909             if (mask & ZOOM_SELECT_READ)
2910                 poll_events += POLLIN;
2911             if (mask & ZOOM_SELECT_WRITE)
2912                 poll_events += POLLOUT;
2913             if (mask & ZOOM_SELECT_EXCEPT)
2914                 poll_events += POLLERR;
2915             pollfds[nfds].fd = fd;
2916             pollfds[nfds].events = poll_events;
2917             pollfds[nfds].revents = 0;
2918             poll_cs[nfds] = c;
2919             nfds++;
2920         }
2921 #else
2922         if (mask & ZOOM_SELECT_READ)
2923         {
2924             FD_SET (fd, &input);
2925             nfds++;
2926         }
2927         if (mask & ZOOM_SELECT_WRITE)
2928         {
2929             FD_SET (fd, &output);
2930             nfds++;
2931         }
2932         if (mask & ZOOM_SELECT_EXCEPT)
2933         {
2934             FD_SET (fd, &except);
2935             nfds++;
2936         }
2937 #endif
2938     }
2939     if (timeout >= 5000)
2940         timeout = 30;
2941
2942     if (!nfds)
2943         return 0;
2944
2945 #if HAVE_SYS_POLL_H
2946     r = poll (pollfds, nfds, timeout * 1000);
2947     for (i = 0; i<nfds; i++)
2948     {
2949         ZOOM_connection c = poll_cs[i];
2950         if (r && c->mask)
2951         {
2952             int mask = 0;
2953             if (pollfds[i].revents & POLLIN)
2954                 mask += ZOOM_SELECT_READ;
2955             if (pollfds[i].revents & POLLOUT)
2956                 mask += ZOOM_SELECT_WRITE;
2957             if (pollfds[i].revents & POLLERR)
2958                 mask += ZOOM_SELECT_EXCEPT;
2959             if (mask)
2960                 ZOOM_connection_do_io(c, mask);
2961         }
2962         else if (r == 0 && c->mask)
2963         {
2964             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2965             /* timeout and this connection was waiting */
2966             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2967             do_close (c);
2968             ZOOM_connection_put_event(c, event);
2969         }
2970     }
2971 #else
2972     tv.tv_sec = timeout;
2973     tv.tv_usec = 0;
2974     yaz_log (LOG_DEBUG, "select start");
2975     r = select (max_fd+1, &input, &output, &except, &tv);
2976     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2977     for (i = 0; i<no; i++)
2978     {
2979         ZOOM_connection c = cs[i];
2980         int fd, mask;
2981
2982         if (!c)
2983             continue;
2984         fd = z3950_connection_socket(c);
2985         mask = 0;
2986         if (r && c->mask)
2987         {
2988             /* no timeout and real socket */
2989             if (FD_ISSET(fd, &input))
2990                 mask += ZOOM_SELECT_READ;
2991             if (FD_ISSET(fd, &output))
2992                 mask += ZOOM_SELECT_WRITE;
2993             if (FD_ISSET(fd, &except))
2994                 mask += ZOOM_SELECT_EXCEPT;
2995             if (mask)
2996                 ZOOM_connection_do_io(c, mask);
2997         }
2998         if (r == 0 && c->mask)
2999         {
3000             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3001             /* timeout and this connection was waiting */
3002             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3003             do_close (c);
3004             yaz_log (LOG_DEBUG, "timeout");
3005             ZOOM_connection_put_event(c, event);
3006         }
3007     }
3008 #endif
3009     for (i = 0; i<no; i++)
3010     {
3011         ZOOM_connection c = cs[i];
3012         ZOOM_Event event;
3013         if (c && (event = ZOOM_connection_get_event(c)))
3014         {
3015             ZOOM_Event_destroy (event);
3016             return i+1;
3017         }
3018     }
3019     return 0;
3020 }