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 1.28 2003-02-23 14:26:58 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
 716     if (memcmp(c->host_port, "http:", 5) == 0)
 717     {
 718 #if HAVE_XML2
 719         const char *path;
 720         c->proto = PROTO_HTTP;
 721         effective_host = c->host_port + 5;
 722         if (*effective_host == '/')
 723             effective_host++;
 724         if (*effective_host == '/')
 725             effective_host++;
 726         if (!(path = strchr(effective_host, '/')))
 727             path = "/";
 728         xfree(c->path);
 729         c->path = xstrdup(path);
 730 #else
 731         c->state = STATE_IDLE;
 732         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 733         return zoom_complete;
 734 #endif
 735     }
 736     c->cs = cs_create_host (effective_host, 0, &add);
 737
 738     if (c->cs)
 739     {
 740         int ret = cs_connect (c->cs, add);
 741         if (ret == 0)
 742         {
 743             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 744             ZOOM_connection_put_event(c, event);
 745             if (c->proto == PROTO_Z3950)
 746                 ZOOM_connection_send_init(c);
 747             else
 748             {
 749                 /* no init request for SRW .. */
 750                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 751                 ZOOM_connection_remove_task (c);
 752                 c->mask = 0;
 753                 ZOOM_connection_exec_task (c);
 754             }
 755             c->state = STATE_ESTABLISHED;
 756             return zoom_pending;
 757         }
 758         else if (ret > 0)
 759         {
 760             c->state = STATE_CONNECTING;
 761             c->mask = ZOOM_SELECT_EXCEPT;
 762             if (c->cs->io_pending & CS_WANT_WRITE)
 763                 c->mask += ZOOM_SELECT_WRITE;
 764             if (c->cs->io_pending & CS_WANT_READ)
 765                 c->mask += ZOOM_SELECT_READ;
 766             return zoom_pending;
 767         }
 768     }
 769     c->state = STATE_IDLE;
 770     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 771     return zoom_complete;
 772 }
 773
 774 int z3950_connection_socket(ZOOM_connection c)
 775 {
 776     if (c->cs)
 777         return cs_fileno(c->cs);
 778     return -1;
 779 }
 780
 781 int z3950_connection_mask(ZOOM_connection c)
 782 {
 783     if (c->cs)
 784         return c->mask;
 785     return 0;
 786 }
 787
 788 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 789 {
 790     int i;
 791     for (i = 0; i<200; i++)
 792     {
 793         size_t len;
 794         Z_OtherInformation **oi;
 795         char buf[80];
 796         const char *val;
 797         const char *cp;
 798         int oidval;
 799
 800         sprintf (buf, "otherInfo%d", i);
 801         val = ZOOM_options_get (c->options, buf);
 802         if (!val)
 803             break;
 804         cp = strchr (val, ':');
 805         if (!cp)
 806             continue;
 807         len = cp - val;
 808         if (len >= sizeof(buf))
 809             len = sizeof(buf)-1;
 810         memcpy (buf, val, len);
 811         buf[len] = '\0';
 812         oidval = oid_getvalbyname (buf);
 813         if (oidval == VAL_NONE)
 814             continue;
 815
 816         yaz_oi_APDU(a, &oi);
 817         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 818     }
 819 }
 820
 821 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 822 {
 823     assert (a);
 824     if (c->cookie_out)
 825     {
 826         Z_OtherInformation **oi;
 827         yaz_oi_APDU(a, &oi);
 828         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 829     }
 830     if (c->client_IP)
 831     {
 832         Z_OtherInformation **oi;
 833         yaz_oi_APDU(a, &oi);
 834         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 835     }
 836     otherInfo_attach (c, a, out);
 837     if (!z_APDU(out, &a, 0, 0))
 838     {
 839         FILE *outf = fopen("/tmp/apdu.txt", "a");
 840         if (a && outf)
 841         {
 842             ODR odr_pr = odr_createmem(ODR_PRINT);
 843             fprintf (outf, "a=%p\n", a);
 844             odr_setprint(odr_pr, outf);
 845             z_APDU(odr_pr, &a, 0, 0);
 846             odr_destroy(odr_pr);
 847         }
 848         yaz_log (LOG_DEBUG, "encoding failed");
 849         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 850         odr_reset(out);
 851         return -1;
 852     }
 853
 854     return 0;
 855 }
 856
 857 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 858 {
 859     ZOOM_Event event;
 860     assert (a);
 861     if (encode_APDU(c, a, c->odr_out))
 862         return zoom_complete;
 863     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 864     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 865     ZOOM_connection_put_event (c, event);
 866     odr_reset(c->odr_out);
 867     return do_write (c);
 868 }
 869
 870 /* returns 1 if PDU was sent OK (still pending )
 871            0 if PDU was not sent OK (nothing to wait for)
 872 */
 873
 874 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 875 {
 876     const char *impname;
 877     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 878     Z_InitRequest *ireq = apdu->u.initRequest;
 879     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 880         odr_malloc(c->odr_out, sizeof(*auth));
 881     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 882     const char *auth_userId = ZOOM_options_get (c->options, "user");
 883     const char *auth_password = ZOOM_options_get (c->options, "pass");
 884
 885     ODR_MASK_SET(ireq->options, Z_Options_search);
 886     ODR_MASK_SET(ireq->options, Z_Options_present);
 887     ODR_MASK_SET(ireq->options, Z_Options_scan);
 888     ODR_MASK_SET(ireq->options, Z_Options_sort);
 889     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 890     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 891
 892     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 893     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 894     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 895
 896     impname = ZOOM_options_get (c->options, "implementationName");
 897     ireq->implementationName =
 898         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 899     strcpy (ireq->implementationName, "");
 900     if (impname)
 901     {
 902         strcat (ireq->implementationName, impname);
 903         strcat (ireq->implementationName, "/");
 904     }
 905     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 906
 907     *ireq->maximumRecordSize =
 908         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 909     *ireq->preferredMessageSize =
 910         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 911
 912     if (auth_groupId || auth_password)
 913     {
 914         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 915         int i = 0;
 916         pass->groupId = 0;
 917         if (auth_groupId && *auth_groupId)
 918         {
 919             pass->groupId = (char *)
 920                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 921             strcpy(pass->groupId, auth_groupId);
 922             i++;
 923         }
 924         pass->userId = 0;
 925         if (auth_userId && *auth_userId)
 926         {
 927             pass->userId = (char *)
 928                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 929             strcpy(pass->userId, auth_userId);
 930             i++;
 931         }
 932         pass->password = 0;
 933         if (auth_password && *auth_password)
 934         {
 935             pass->password = (char *)
 936                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 937             strcpy(pass->password, auth_password);
 938             i++;
 939         }
 940         if (i)
 941         {
 942             auth->which = Z_IdAuthentication_idPass;
 943             auth->u.idPass = pass;
 944             ireq->idAuthentication = auth;
 945         }
 946     }
 947     else if (auth_userId)
 948     {
 949         auth->which = Z_IdAuthentication_open;
 950         auth->u.open = (char *)
 951             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 952         strcpy(auth->u.open, auth_userId);
 953         ireq->idAuthentication = auth;
 954     }
 955     if (c->proxy)
 956         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 957                                  VAL_PROXY, 1, c->host_port);
 958     if (c->charset||c->lang)
 959     {
 960         Z_OtherInformation **oi;
 961         Z_OtherInformationUnit *oi_unit;
 962
 963         yaz_oi_APDU(apdu, &oi);
 964
 965         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 966         {
 967             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 968
 969             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 970             oi_unit->information.externallyDefinedInfo =
 971                 yaz_set_proposal_charneg
 972                 (c->odr_out,
 973                  (const char **)&c->charset, (c->charset) ? 1:0,
 974                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 975         }
 976     }
 977     assert (apdu);
 978     return send_APDU (c, apdu);
 979 }
 980
 981 #if HAVE_XML2
 982 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
 983 {
 984     Z_SOAP_Handler h[2] = {
 985         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 986         {0, 0, 0}
 987     };
 988     ODR o = odr_createmem(ODR_ENCODE);
 989     int ret;
 990     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 991     Z_GDU *gdu;
 992     ZOOM_Event event;
 993
 994     gdu = z_get_HTTP_Request(c->odr_out);
 995     gdu->u.HTTP_Request->path = c->path;
 996     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 997                       "Content-Type", "text/xml");
 998     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 999                       "SOAPAction", "\"\"");
1000     p->which = Z_SOAP_generic;
1001     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1002     p->u.generic->no = 0;
1003     p->u.generic->ns = 0;
1004     p->u.generic->p = sr;
1005     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1006
1007     ret = z_soap_codec(o, &p,
1008                        &gdu->u.HTTP_Request->content_buf,
1009                        &gdu->u.HTTP_Request->content_len, h);
1010
1011     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1012         return zoom_complete;
1013     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1014
1015     odr_destroy(o);
1016
1017     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1018     ZOOM_connection_put_event (c, event);
1019     odr_reset(c->odr_out);
1020     return do_write (c);
1021 }
1022 #endif
1023
1024 #if HAVE_XML2
1025 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1026 {
1027     int i;
1028     ZOOM_resultset resultset = 0;
1029     Z_SRW_PDU *sr = 0;
1030
1031     if (c->error)                  /* don't continue on error */
1032         return zoom_complete;
1033     assert (c->tasks);
1034     if (c->tasks->which == ZOOM_TASK_SEARCH)
1035     {
1036         resultset = c->tasks->u.search.resultset;
1037         resultset->setname = xstrdup ("default");
1038         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1039     }
1040     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1041     {
1042         resultset = c->tasks->u.retrieve.resultset;
1043
1044         resultset->start = c->tasks->u.retrieve.start;
1045         resultset->count = c->tasks->u.retrieve.count;
1046
1047         if (resultset->start >= resultset->size)
1048             return zoom_complete;
1049         if (resultset->start + resultset->count > resultset->size)
1050             resultset->count = resultset->size - resultset->start;
1051
1052         for (i = 0; i<resultset->count; i++)
1053         {
1054             ZOOM_record rec =
1055                 record_cache_lookup (resultset, i + resultset->start);
1056             if (!rec)
1057                 break;
1058         }
1059         if (i == resultset->count)
1060             return zoom_complete;
1061     }
1062     assert(resultset->query);
1063
1064     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1065
1066     if (resultset->query->z_query->which == Z_Query_type_104
1067         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1068     {
1069
1070         sr->u.request->query_type = Z_SRW_query_type_cql;
1071         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1072     }
1073     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1074              resultset->query->z_query->u.type_1)
1075     {
1076         sr->u.request->query_type = Z_SRW_query_type_pqf;
1077         sr->u.request->query.pqf = resultset->query->query_string;
1078     }
1079     else
1080     {
1081         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1082         return zoom_complete;
1083     }
1084     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1085     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1086     sr->u.request->recordSchema = resultset->schema;
1087
1088
1089     return send_srw(c, sr);
1090 }
1091 #else
1092 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1093 {
1094     return zoom_complete;
1095 }
1096 #endif
1097
1098 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1099 {
1100     ZOOM_resultset r;
1101     int lslb, ssub, mspn;
1102     const char *syntax;
1103     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1104     Z_SearchRequest *search_req = apdu->u.searchRequest;
1105     const char *elementSetName;
1106     const char *smallSetElementSetName;
1107     const char *mediumSetElementSetName;
1108
1109     assert (c->tasks);
1110     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1111
1112     r = c->tasks->u.search.resultset;
1113
1114     elementSetName =
1115         ZOOM_options_get (r->options, "elementSetName");
1116     smallSetElementSetName  =
1117         ZOOM_options_get (r->options, "smallSetElementSetName");
1118     mediumSetElementSetName =
1119         ZOOM_options_get (r->options, "mediumSetElementSetName");
1120
1121     if (!smallSetElementSetName)
1122         smallSetElementSetName = elementSetName;
1123
1124     if (!mediumSetElementSetName)
1125         mediumSetElementSetName = elementSetName;
1126
1127     assert (r);
1128     assert (r->query);
1129
1130     /* prepare query for the search request */
1131     search_req->query = r->query->z_query;
1132
1133     search_req->databaseNames =
1134         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1135
1136     /* get syntax (no need to provide unless piggyback is in effect) */
1137     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1138
1139     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1140     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1141     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1142     if (lslb != -1 && ssub != -1 && mspn != -1)
1143     {
1144         /* So're a Z39.50 expert? Let's hope you don't do sort */
1145         *search_req->largeSetLowerBound = lslb;
1146         *search_req->smallSetUpperBound = ssub;
1147         *search_req->mediumSetPresentNumber = mspn;
1148     }
1149     else if (r->start == 0 && r->count > 0
1150              && r->piggyback && !r->r_sort_spec && !r->schema)
1151     {
1152         /* Regular piggyback - do it unless we're going to do sort */
1153         *search_req->largeSetLowerBound = 2000000000;
1154         *search_req->smallSetUpperBound = 0;
1155         *search_req->mediumSetPresentNumber = r->count;
1156         smallSetElementSetName = 0;
1157     }
1158     else
1159     {
1160         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1161         smallSetElementSetName = 0;
1162         mediumSetElementSetName = 0;
1163         syntax = 0;
1164     }
1165     if (smallSetElementSetName && *smallSetElementSetName)
1166     {
1167         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1168             odr_malloc (c->odr_out, sizeof(*esn));
1169
1170         esn->which = Z_ElementSetNames_generic;
1171         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1172         search_req->smallSetElementSetNames = esn;
1173     }
1174     if (mediumSetElementSetName && *mediumSetElementSetName)
1175     {
1176         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1177             odr_malloc (c->odr_out, sizeof(*esn));
1178
1179         esn->which = Z_ElementSetNames_generic;
1180         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1181         search_req->mediumSetElementSetNames = esn;
1182     }
1183     if (syntax)
1184         search_req->preferredRecordSyntax =
1185             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1186
1187     if (!r->setname)
1188     {
1189         if (c->support_named_resultsets)
1190         {
1191             char setname[14];
1192             int ord;
1193             /* find the lowest unused ordinal so that we re-use
1194                result sets on the server. */
1195             for (ord = 1; ; ord++)
1196             {
1197                 ZOOM_resultset rp;
1198                 sprintf (setname, "%d", ord);
1199                 for (rp = c->resultsets; rp; rp = rp->next)
1200                     if (rp->setname && !strcmp (rp->setname, setname))
1201                         break;
1202                 if (!rp)
1203                     break;
1204             }
1205             r->setname = xstrdup (setname);
1206             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1207         }
1208         else
1209             r->setname = xstrdup ("default");
1210         ZOOM_options_set (r->options, "setname", r->setname);
1211     }
1212     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1213     /* send search request */
1214     return send_APDU (c, apdu);
1215 }
1216
1217 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1218 {
1219     int oclass;
1220     Z_DefaultDiagFormat *r;
1221     char *addinfo = 0;
1222
1223     xfree (c->addinfo);
1224     c->addinfo = 0;
1225     if (p->which != Z_DiagRec_defaultFormat)
1226     {
1227         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1228         return;
1229     }
1230     r = p->u.defaultFormat;
1231     switch (r->which)
1232     {
1233     case Z_DefaultDiagFormat_v2Addinfo:
1234         addinfo = r->u.v2Addinfo;
1235         break;
1236     case Z_DefaultDiagFormat_v3Addinfo:
1237         addinfo = r->u.v3Addinfo;
1238         break;
1239     }
1240     set_dset_error(c, *r->condition,
1241                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1242                    addinfo, 0);
1243 }
1244
1245 ZOOM_API(ZOOM_record)
1246 ZOOM_record_clone (ZOOM_record srec)
1247 {
1248     char *buf;
1249     int size;
1250     ODR odr_enc;
1251     ZOOM_record nrec;
1252
1253     odr_enc = odr_createmem(ODR_ENCODE);
1254     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1255         return 0;
1256     buf = odr_getbuf (odr_enc, &size, 0);
1257
1258     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1259     nrec->odr = odr_createmem(ODR_DECODE);
1260     nrec->wrbuf_marc = 0;
1261     odr_setbuf (nrec->odr, buf, size, 0);
1262     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1263
1264     odr_destroy (odr_enc);
1265     return nrec;
1266 }
1267
1268 ZOOM_API(ZOOM_record)
1269 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1270 {
1271     return record_cache_lookup (s, pos);
1272 }
1273
1274 ZOOM_API(ZOOM_record)
1275 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1276 {
1277     ZOOM_resultset_retrieve (r, 1, pos, 1);
1278     return ZOOM_resultset_record_immediate (r, pos);
1279 }
1280
1281 ZOOM_API(void)
1282 ZOOM_record_destroy (ZOOM_record rec)
1283 {
1284     if (!rec)
1285         return;
1286     if (rec->wrbuf_marc)
1287         wrbuf_free (rec->wrbuf_marc, 1);
1288     odr_destroy (rec->odr);
1289     xfree (rec);
1290 }
1291
1292 ZOOM_API(const char *)
1293 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1294 {
1295     Z_NamePlusRecord *npr;
1296
1297     if (len)
1298         *len = 0; /* default return */
1299
1300     if (!rec)
1301         return 0;
1302     npr = rec->npr;
1303     if (!npr)
1304         return 0;
1305     if (!strcmp (type, "database"))
1306     {
1307         if (len)
1308             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1309         return npr->databaseName;
1310     }
1311     else if (!strcmp (type, "syntax"))
1312     {
1313         const char *desc = 0;
1314         if (npr->which == Z_NamePlusRecord_databaseRecord)
1315         {
1316             Z_External *r = (Z_External *) npr->u.databaseRecord;
1317             oident *ent = oid_getentbyoid(r->direct_reference);
1318             if (ent)
1319                 desc = ent->desc;
1320         }
1321         if (!desc)
1322             desc = "none";
1323         if (len)
1324             *len = strlen(desc);
1325         return desc;
1326     }
1327     else if (!strcmp (type, "render") &&
1328              npr->which == Z_NamePlusRecord_databaseRecord)
1329     {
1330         Z_External *r = (Z_External *) npr->u.databaseRecord;
1331         oident *ent = oid_getentbyoid(r->direct_reference);
1332
1333         if (r->which == Z_External_sutrs)
1334         {
1335             if (len) *len = r->u.sutrs->len;
1336             return (const char *) r->u.sutrs->buf;
1337         }
1338         else if (r->which == Z_External_octet)
1339         {
1340             yaz_marc_t mt;
1341             switch (ent->value)
1342             {
1343             case VAL_SOIF:
1344             case VAL_HTML:
1345             case VAL_SUTRS:
1346                 break;
1347             case VAL_TEXT_XML:
1348             case VAL_APPLICATION_XML:
1349                 break;
1350             default:
1351                 if (!rec->wrbuf_marc)
1352                     rec->wrbuf_marc = wrbuf_alloc();
1353
1354                 mt = yaz_marc_create();
1355                 wrbuf_rewind (rec->wrbuf_marc);
1356                 if (yaz_marc_decode_wrbuf (
1357                         mt, (const char *) r->u.octet_aligned->buf,
1358                         r->u.octet_aligned->len,
1359                         rec->wrbuf_marc) > 0)
1360                 {
1361                     if (len)
1362                         *len = wrbuf_len(rec->wrbuf_marc);
1363                     yaz_marc_destroy(mt);
1364                     return wrbuf_buf(rec->wrbuf_marc);
1365                 }
1366                 yaz_marc_destroy(mt);
1367             }
1368             if (len)
1369                 *len = r->u.octet_aligned->len;
1370             return (const char *) r->u.octet_aligned->buf;
1371         }
1372         else if (r->which == Z_External_grs1)
1373         {
1374             if (!rec->wrbuf_marc)
1375                 rec->wrbuf_marc = wrbuf_alloc();
1376             wrbuf_rewind (rec->wrbuf_marc);
1377             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1378             if (len)
1379                 *len = wrbuf_len(rec->wrbuf_marc);
1380             return wrbuf_buf(rec->wrbuf_marc);
1381         }
1382         return 0;
1383     }
1384     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1385              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1386     {
1387         Z_External *r = (Z_External *) npr->u.databaseRecord;
1388         oident *ent = oid_getentbyoid(r->direct_reference);
1389
1390         if (r->which == Z_External_sutrs)
1391         {
1392             if (len) *len = r->u.sutrs->len;
1393             return (const char *) r->u.sutrs->buf;
1394         }
1395         else if (r->which == Z_External_octet)
1396         {
1397             yaz_marc_t mt;
1398             int marc_decode_type = YAZ_MARC_MARCXML;
1399
1400             if (!strcmp(type, "oai"))
1401                 marc_decode_type = YAZ_MARC_OAIMARC;
1402             switch (ent->value)
1403             {
1404             case VAL_SOIF:
1405             case VAL_HTML:
1406             case VAL_SUTRS:
1407                 break;
1408             case VAL_TEXT_XML:
1409             case VAL_APPLICATION_XML:
1410                 break;
1411             default:
1412                 if (!rec->wrbuf_marc)
1413                     rec->wrbuf_marc = wrbuf_alloc();
1414                 wrbuf_rewind (rec->wrbuf_marc);
1415                 mt = yaz_marc_create();
1416
1417                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1418                 if (yaz_marc_decode_wrbuf (
1419                         mt, (const char *) r->u.octet_aligned->buf,
1420                         r->u.octet_aligned->len,
1421                         rec->wrbuf_marc) > 0)
1422                 {
1423                     if (len)
1424                         *len = wrbuf_len(rec->wrbuf_marc);
1425                     yaz_marc_destroy(mt);
1426                     return wrbuf_buf(rec->wrbuf_marc);
1427                 }
1428                 yaz_marc_destroy(mt);
1429             }
1430             if (len) *len = r->u.octet_aligned->len;
1431             return (const char *) r->u.octet_aligned->buf;
1432         }
1433         else if (r->which == Z_External_grs1)
1434         {
1435             if (len) *len = 5;
1436             return "GRS-1";
1437         }
1438         return 0;
1439     }
1440     else if (!strcmp (type, "raw"))
1441     {
1442         if (npr->which == Z_NamePlusRecord_databaseRecord)
1443         {
1444             Z_External *r = (Z_External *) npr->u.databaseRecord;
1445
1446             if (r->which == Z_External_sutrs)
1447             {
1448                 if (len) *len = r->u.sutrs->len;
1449                 return (const char *) r->u.sutrs->buf;
1450             }
1451             else if (r->which == Z_External_octet)
1452             {
1453                 if (len) *len = r->u.octet_aligned->len;
1454                 return (const char *) r->u.octet_aligned->buf;
1455             }
1456             else /* grs-1, explain, ... */
1457             {
1458                 if (len) *len = -1;
1459                 return (const char *) npr->u.databaseRecord;
1460             }
1461         }
1462         return 0;
1463     }
1464     else if (!strcmp (type, "ext"))
1465     {
1466         if (npr->which == Z_NamePlusRecord_databaseRecord)
1467             return (const char *) npr->u.databaseRecord;
1468         return 0;
1469     }
1470     return 0;
1471 }
1472
1473 static int strcmp_null(const char *v1, const char *v2)
1474 {
1475     if (!v1 && !v2)
1476         return 0;
1477     if (!v1 || !v2)
1478         return -1;
1479     return strcmp(v1, v2);
1480 }
1481
1482 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1483                               int pos)
1484 {
1485     ZOOM_record_cache rc;
1486     const char *elementSetName =
1487         ZOOM_resultset_option_get (r, "elementSetName");
1488     const char *syntax =
1489         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1490
1491     for (rc = r->record_cache; rc; rc = rc->next)
1492     {
1493         if (pos == rc->pos)
1494         {
1495             if (strcmp_null(r->schema, rc->schema))
1496                 continue;
1497             if (strcmp_null(elementSetName,rc->elementSetName))
1498                 continue;
1499             if (strcmp_null(syntax, rc->syntax))
1500                 continue;
1501             /* not destroying rc->npr (it's handled by nmem )*/
1502             rc->rec.npr = npr;
1503             /* keeping wrbuf_marc too */
1504             return;
1505         }
1506     }
1507     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1508     rc->rec.npr = npr;
1509     rc->rec.odr = 0;
1510     rc->rec.wrbuf_marc = 0;
1511     if (elementSetName)
1512         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1513     else
1514         rc->elementSetName = 0;
1515
1516     if (syntax)
1517         rc->syntax = odr_strdup (r->odr, syntax);
1518     else
1519         rc->syntax = 0;
1520
1521     if (r->schema)
1522         rc->schema = odr_strdup (r->odr, r->schema);
1523     else
1524         rc->schema = 0;
1525
1526     rc->pos = pos;
1527     rc->next = r->record_cache;
1528     r->record_cache = rc;
1529 }
1530
1531 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1532 {
1533     ZOOM_record_cache rc;
1534     const char *elementSetName =
1535         ZOOM_resultset_option_get (r, "elementSetName");
1536     const char *syntax =
1537         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1538
1539     for (rc = r->record_cache; rc; rc = rc->next)
1540     {
1541         if (pos == rc->pos)
1542         {
1543             if (strcmp_null(r->schema, rc->schema))
1544                 continue;
1545             if (strcmp_null(elementSetName,rc->elementSetName))
1546                 continue;
1547             if (strcmp_null(syntax, rc->syntax))
1548                 continue;
1549             return &rc->rec;
1550         }
1551     }
1552     return 0;
1553 }
1554
1555 static void handle_records (ZOOM_connection c, Z_Records *sr,
1556                             int present_phase)
1557 {
1558     ZOOM_resultset resultset;
1559
1560     if (!c->tasks)
1561         return ;
1562     switch (c->tasks->which)
1563     {
1564     case ZOOM_TASK_SEARCH:
1565         resultset = c->tasks->u.search.resultset;
1566         break;
1567     case ZOOM_TASK_RETRIEVE:
1568         resultset = c->tasks->u.retrieve.resultset;
1569         break;
1570     default:
1571         return;
1572     }
1573     if (sr && sr->which == Z_Records_NSD)
1574     {
1575         Z_DiagRec dr, *dr_p = &dr;
1576         dr.which = Z_DiagRec_defaultFormat;
1577         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1578
1579         response_diag (c, dr_p);
1580     }
1581     else if (sr && sr->which == Z_Records_multipleNSD)
1582     {
1583         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1584             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1585         else
1586             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1587     }
1588     else
1589     {
1590         if (resultset->count + resultset->start > resultset->size)
1591             resultset->count = resultset->size - resultset->start;
1592         if (resultset->count < 0)
1593             resultset->count = 0;
1594         if (sr && sr->which == Z_Records_DBOSD)
1595         {
1596             int i;
1597             NMEM nmem = odr_extract_mem (c->odr_in);
1598             Z_NamePlusRecordList *p =
1599                 sr->u.databaseOrSurDiagnostics;
1600             for (i = 0; i<p->num_records; i++)
1601             {
1602                 record_cache_add (resultset, p->records[i],
1603                                   i+ resultset->start);
1604             }
1605             /* transfer our response to search_nmem .. we need it later */
1606             nmem_transfer (resultset->odr->mem, nmem);
1607             nmem_destroy (nmem);
1608             if (present_phase && p->num_records == 0)
1609             {
1610                 /* present response and we didn't get any records! */
1611                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1612             }
1613         }
1614         else if (present_phase)
1615         {
1616             /* present response and we didn't get any records! */
1617             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1618         }
1619     }
1620 }
1621
1622 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1623 {
1624     handle_records (c, pr->records, 1);
1625 }
1626
1627 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1628 {
1629     ZOOM_resultset resultset;
1630
1631     yaz_log (LOG_DEBUG, "got search response");
1632
1633     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1634         return ;
1635
1636     resultset = c->tasks->u.search.resultset;
1637
1638     resultset->size = *sr->resultCount;
1639     handle_records (c, sr->records, 0);
1640 }
1641
1642 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1643 {
1644     if (res->diagnostics && res->num_diagnostics > 0)
1645         response_diag (c, res->diagnostics[0]);
1646 }
1647
1648 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1649 {
1650     NMEM nmem = odr_extract_mem (c->odr_in);
1651     ZOOM_scanset scan;
1652
1653     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1654         return 0;
1655     scan = c->tasks->u.scan.scan;
1656
1657     if (res->entries && res->entries->nonsurrogateDiagnostics)
1658         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1659     scan->scan_response = res;
1660     nmem_transfer (scan->odr->mem, nmem);
1661     if (res->stepSize)
1662         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1663     if (res->positionOfTerm)
1664         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1665     if (res->scanStatus)
1666         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1667     if (res->numberOfEntriesReturned)
1668         ZOOM_options_set_int (scan->options, "number",
1669                               *res->numberOfEntriesReturned);
1670     nmem_destroy (nmem);
1671     return 1;
1672 }
1673
1674 static zoom_ret send_sort (ZOOM_connection c)
1675 {
1676     ZOOM_resultset  resultset;
1677
1678     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1679         return zoom_complete;
1680
1681     resultset = c->tasks->u.search.resultset;
1682
1683     if (c->error)
1684     {
1685         resultset->r_sort_spec = 0;
1686         return zoom_complete;
1687     }
1688     if (resultset->r_sort_spec)
1689     {
1690         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1691         Z_SortRequest *req = apdu->u.sortRequest;
1692
1693         req->num_inputResultSetNames = 1;
1694         req->inputResultSetNames = (Z_InternationalString **)
1695             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1696         req->inputResultSetNames[0] =
1697             odr_strdup (c->odr_out, resultset->setname);
1698         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1699         req->sortSequence = resultset->r_sort_spec;
1700         resultset->r_sort_spec = 0;
1701         return send_APDU (c, apdu);
1702     }
1703     return zoom_complete;
1704 }
1705
1706 static zoom_ret send_present (ZOOM_connection c)
1707 {
1708     Z_APDU *apdu = 0;
1709     Z_PresentRequest *req = 0;
1710     int i = 0;
1711     const char *syntax = 0;
1712     const char *elementSetName = 0;
1713     ZOOM_resultset  resultset;
1714
1715     if (!c->tasks)
1716         return zoom_complete;
1717
1718     switch (c->tasks->which)
1719     {
1720     case ZOOM_TASK_SEARCH:
1721         resultset = c->tasks->u.search.resultset;
1722         break;
1723     case ZOOM_TASK_RETRIEVE:
1724         resultset = c->tasks->u.retrieve.resultset;
1725         resultset->start = c->tasks->u.retrieve.start;
1726         resultset->count = c->tasks->u.retrieve.count;
1727
1728         if (resultset->start >= resultset->size)
1729             return zoom_complete;
1730         if (resultset->start + resultset->count > resultset->size)
1731             resultset->count = resultset->size - resultset->start;
1732         break;
1733     default:
1734         return zoom_complete;
1735     }
1736
1737     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1738     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1739
1740     if (c->error)                  /* don't continue on error */
1741         return zoom_complete;
1742     if (resultset->start < 0)
1743         return zoom_complete;
1744     for (i = 0; i<resultset->count; i++)
1745     {
1746         ZOOM_record rec =
1747             record_cache_lookup (resultset, i + resultset->start);
1748         if (!rec)
1749             break;
1750     }
1751     if (i == resultset->count)
1752         return zoom_complete;
1753
1754     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1755     req = apdu->u.presentRequest;
1756
1757     resultset->start += i;
1758     resultset->count -= i;
1759     *req->resultSetStartPoint = resultset->start + 1;
1760     *req->numberOfRecordsRequested = resultset->count;
1761     assert (*req->numberOfRecordsRequested > 0);
1762
1763     if (syntax && *syntax)
1764         req->preferredRecordSyntax =
1765             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1766
1767     if (resultset->schema && *resultset->schema)
1768     {
1769         Z_RecordComposition *compo = (Z_RecordComposition *)
1770             odr_malloc (c->odr_out, sizeof(*compo));
1771
1772         req->recordComposition = compo;
1773         compo->which = Z_RecordComp_complex;
1774         compo->u.complex = (Z_CompSpec *)
1775             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1776         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1777             odr_malloc(c->odr_out, sizeof(bool_t));
1778         *compo->u.complex->selectAlternativeSyntax = 0;
1779
1780         compo->u.complex->generic = (Z_Specification *)
1781             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1782
1783         compo->u.complex->generic->which = Z_Schema_oid;
1784         compo->u.complex->generic->schema.oid = (Odr_oid *)
1785             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1786
1787         if (!compo->u.complex->generic->schema.oid)
1788         {
1789             /* OID wasn't a schema! Try record syntax instead. */
1790
1791             compo->u.complex->generic->schema.oid = (Odr_oid *)
1792                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1793         }
1794         if (elementSetName && *elementSetName)
1795         {
1796             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1797                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1798             compo->u.complex->generic->elementSpec->which =
1799                 Z_ElementSpec_elementSetName;
1800             compo->u.complex->generic->elementSpec->u.elementSetName =
1801                 odr_strdup (c->odr_out, elementSetName);
1802         }
1803         else
1804             compo->u.complex->generic->elementSpec = 0;
1805         compo->u.complex->num_dbSpecific = 0;
1806         compo->u.complex->dbSpecific = 0;
1807         compo->u.complex->num_recordSyntax = 0;
1808         compo->u.complex->recordSyntax = 0;
1809     }
1810     else if (elementSetName && *elementSetName)
1811     {
1812         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1813             odr_malloc (c->odr_out, sizeof(*esn));
1814         Z_RecordComposition *compo = (Z_RecordComposition *)
1815             odr_malloc (c->odr_out, sizeof(*compo));
1816
1817         esn->which = Z_ElementSetNames_generic;
1818         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1819         compo->which = Z_RecordComp_simple;
1820         compo->u.simple = esn;
1821         req->recordComposition = compo;
1822     }
1823     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1824     return send_APDU (c, apdu);
1825 }
1826
1827 ZOOM_API(ZOOM_scanset)
1828 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1829 {
1830     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1831
1832     scan->connection = c;
1833     scan->odr = odr_createmem (ODR_DECODE);
1834     scan->options = ZOOM_options_create_with_parent (c->options);
1835     scan->refcount = 1;
1836     scan->scan_response = 0;
1837
1838     if ((scan->termListAndStartPoint =
1839          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1840                       start)))
1841     {
1842         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1843         task->u.scan.scan = scan;
1844
1845         (scan->refcount)++;
1846         if (!c->async)
1847         {
1848             while (ZOOM_event (1, &c))
1849                 ;
1850         }
1851     }
1852     return scan;
1853 }
1854
1855 ZOOM_API(void)
1856 ZOOM_scanset_destroy (ZOOM_scanset scan)
1857 {
1858     if (!scan)
1859         return;
1860     (scan->refcount)--;
1861     if (scan->refcount == 0)
1862     {
1863         odr_destroy (scan->odr);
1864
1865         ZOOM_options_destroy (scan->options);
1866         xfree (scan);
1867     }
1868 }
1869
1870 static zoom_ret send_package (ZOOM_connection c)
1871 {
1872     ZOOM_Event event;
1873     if (!c->tasks)
1874         return zoom_complete;
1875     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1876
1877     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1878     ZOOM_connection_put_event (c, event);
1879
1880     return do_write_ex (c, c->tasks->u.package->buf_out,
1881                         c->tasks->u.package->len_out);
1882 }
1883
1884 static zoom_ret send_scan (ZOOM_connection c)
1885 {
1886     ZOOM_scanset scan;
1887     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1888     Z_ScanRequest *req = apdu->u.scanRequest;
1889     if (!c->tasks)
1890         return zoom_complete;
1891     assert (c->tasks->which == ZOOM_TASK_SCAN);
1892     scan = c->tasks->u.scan.scan;
1893
1894     req->termListAndStartPoint = scan->termListAndStartPoint;
1895     req->attributeSet = scan->attributeSet;
1896
1897     *req->numberOfTermsRequested =
1898         ZOOM_options_get_int(scan->options, "number", 10);
1899
1900     req->preferredPositionInResponse =
1901         odr_intdup (c->odr_out,
1902                     ZOOM_options_get_int(scan->options, "position", 1));
1903
1904     req->stepSize =
1905         odr_intdup (c->odr_out,
1906                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1907
1908     req->databaseNames = set_DatabaseNames (c, scan->options,
1909                                             &req->num_databaseNames);
1910
1911     return send_APDU (c, apdu);
1912 }
1913
1914 ZOOM_API(size_t)
1915 ZOOM_scanset_size (ZOOM_scanset scan)
1916 {
1917     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1918         return 0;
1919     return scan->scan_response->entries->num_entries;
1920 }
1921
1922 ZOOM_API(const char *)
1923 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1924                                int *occ, int *len)
1925 {
1926     const char *term = 0;
1927     size_t noent = ZOOM_scanset_size (scan);
1928     Z_ScanResponse *res = scan->scan_response;
1929
1930     *len = 0;
1931     *occ = 0;
1932     if (pos >= noent)
1933         return 0;
1934     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1935     {
1936         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1937
1938         if (t->term->which == Z_Term_general)
1939         {
1940             term = (const char *) t->term->u.general->buf;
1941             *len = t->term->u.general->len;
1942         }
1943         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1944     }
1945     return term;
1946 }
1947
1948 ZOOM_API(const char *)
1949 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1950 {
1951     return ZOOM_options_get (scan->options, key);
1952 }
1953
1954 ZOOM_API(void)
1955 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1956                               const char *val)
1957 {
1958     ZOOM_options_set (scan->options, key, val);
1959 }
1960
1961 static Z_APDU *create_es_package (ZOOM_package p, int type)
1962 {
1963     const char *str;
1964     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1965     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1966
1967     *req->function = Z_ExtendedServicesRequest_create;
1968
1969     str = ZOOM_options_get(p->options, "package-name");
1970     if (str && *str)
1971         req->packageName = nmem_strdup (p->odr_out->mem, str);
1972
1973     str = ZOOM_options_get(p->options, "user-id");
1974     if (str)
1975         req->userId = nmem_strdup (p->odr_out->mem, str);
1976
1977     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1978                                               type);
1979
1980     str = ZOOM_options_get(p->options, "function");
1981     if (str)
1982     {
1983         if (!strcmp (str, "create"))
1984             *req->function = 1;
1985         if (!strcmp (str, "delete"))
1986             *req->function = 2;
1987         if (!strcmp (str, "modify"))
1988             *req->function = 3;
1989     }
1990     return apdu;
1991 }
1992
1993 static const char *ill_array_lookup (void *clientData, const char *idx)
1994 {
1995     ZOOM_package p = (ZOOM_package) clientData;
1996     return ZOOM_options_get (p->options, idx+4);
1997 }
1998
1999 static Z_External *encode_ill_request (ZOOM_package p)
2000 {
2001     ODR out = p->odr_out;
2002     ILL_Request *req;
2003     Z_External *r = 0;
2004     struct ill_get_ctl ctl;
2005
2006     ctl.odr = p->odr_out;
2007     ctl.clientData = p;
2008     ctl.f = ill_array_lookup;
2009
2010     req = ill_get_ILLRequest(&ctl, "ill", 0);
2011
2012     if (!ill_Request (out, &req, 0, 0))
2013     {
2014         int ill_request_size;
2015         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2016         if (ill_request_buf)
2017             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2018         return 0;
2019     }
2020     else
2021     {
2022         oident oid;
2023         int illRequest_size = 0;
2024         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2025
2026         oid.proto = PROTO_GENERAL;
2027         oid.oclass = CLASS_GENERAL;
2028         oid.value = VAL_ISO_ILL_1;
2029
2030         r = (Z_External *) odr_malloc (out, sizeof(*r));
2031         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2032         r->indirect_reference = 0;
2033         r->descriptor = 0;
2034         r->which = Z_External_single;
2035
2036         r->u.single_ASN1_type = (Odr_oct *)
2037             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2038         r->u.single_ASN1_type->buf = (unsigned char*)
2039             odr_malloc (out, illRequest_size);
2040         r->u.single_ASN1_type->len = illRequest_size;
2041         r->u.single_ASN1_type->size = illRequest_size;
2042         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2043     }
2044     return r;
2045 }
2046
2047 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2048 {
2049     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2050     const char *str;
2051
2052     req->which=Z_IOItemOrder_esRequest;
2053     req->u.esRequest = (Z_IORequest *)
2054         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2055
2056     /* to keep part ... */
2057     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2058         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2059     req->u.esRequest->toKeep->supplDescription = 0;
2060     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2061         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2062
2063     str = ZOOM_options_get(p->options, "contact-name");
2064     req->u.esRequest->toKeep->contact->name = str ?
2065         nmem_strdup (p->odr_out->mem, str) : 0;
2066
2067     str = ZOOM_options_get(p->options, "contact-phone");
2068     req->u.esRequest->toKeep->contact->phone = str ?
2069         nmem_strdup (p->odr_out->mem, str) : 0;
2070
2071     str = ZOOM_options_get(p->options, "contact-email");
2072     req->u.esRequest->toKeep->contact->email = str ?
2073         nmem_strdup (p->odr_out->mem, str) : 0;
2074
2075     req->u.esRequest->toKeep->addlBilling = 0;
2076
2077     /* not to keep part ... */
2078     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2079         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2080
2081     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2082         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2083
2084     str = ZOOM_options_get(p->options, "itemorder-setname");
2085     if (!str)
2086         str = "default";
2087     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2088         nmem_strdup (p->odr_out->mem, str);
2089     req->u.esRequest->notToKeep->resultSetItem->item =
2090         (int *) odr_malloc(p->odr_out, sizeof(int));
2091
2092     str = ZOOM_options_get(p->options, "itemorder-item");
2093     *req->u.esRequest->notToKeep->resultSetItem->item =
2094         (str ? atoi(str) : 1);
2095
2096     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2097
2098     return req;
2099 }
2100
2101 ZOOM_API(void)
2102     ZOOM_package_send (ZOOM_package p, const char *type)
2103 {
2104     Z_APDU *apdu = 0;
2105     ZOOM_connection c;
2106     if (!p)
2107         return;
2108     c = p->connection;
2109     odr_reset (p->odr_out);
2110     xfree (p->buf_out);
2111     p->buf_out = 0;
2112     if (!strcmp(type, "itemorder"))
2113     {
2114         Z_External *r;
2115         apdu = create_es_package (p, VAL_ITEMORDER);
2116         if (apdu)
2117         {
2118             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2119
2120             r->direct_reference =
2121                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2122                                        VAL_ITEMORDER);
2123             r->descriptor = 0;
2124             r->which = Z_External_itemOrder;
2125             r->indirect_reference = 0;
2126             r->u.itemOrder = encode_item_order (p);
2127
2128             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2129         }
2130     }
2131     if (apdu)
2132     {
2133         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2134         {
2135             char *buf;
2136
2137             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2138             task->u.package = p;
2139             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2140             p->buf_out = (char *) xmalloc (p->len_out);
2141             memcpy (p->buf_out, buf, p->len_out);
2142
2143             (p->refcount)++;
2144             if (!c->async)
2145             {
2146                 while (ZOOM_event (1, &c))
2147                     ;
2148             }
2149         }
2150     }
2151 }
2152
2153 ZOOM_API(ZOOM_package)
2154     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2155 {
2156     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2157
2158     p->connection = c;
2159     p->odr_out = odr_createmem (ODR_ENCODE);
2160     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2161     p->refcount = 1;
2162     p->buf_out = 0;
2163     p->len_out = 0;
2164     return p;
2165 }
2166
2167 ZOOM_API(void)
2168     ZOOM_package_destroy(ZOOM_package p)
2169 {
2170     if (!p)
2171         return;
2172     (p->refcount)--;
2173     if (p->refcount == 0)
2174     {
2175         odr_destroy (p->odr_out);
2176         xfree (p->buf_out);
2177
2178         ZOOM_options_destroy (p->options);
2179         xfree (p);
2180     }
2181 }
2182
2183 ZOOM_API(const char *)
2184 ZOOM_package_option_get (ZOOM_package p, const char *key)
2185 {
2186     return ZOOM_options_get (p->options, key);
2187 }
2188
2189
2190 ZOOM_API(void)
2191 ZOOM_package_option_set (ZOOM_package p, const char *key,
2192                               const char *val)
2193 {
2194     ZOOM_options_set (p->options, key, val);
2195 }
2196
2197 static int ZOOM_connection_exec_task (ZOOM_connection c)
2198 {
2199     ZOOM_task task = c->tasks;
2200     zoom_ret ret = zoom_complete;
2201
2202     if (!task)
2203     {
2204         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2205         return 0;
2206     }
2207     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2208              task->which, task->running);
2209     if (c->error != ZOOM_ERROR_NONE)
2210     {
2211         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2212         ZOOM_connection_remove_tasks (c);
2213         return 0;
2214     }
2215     if (task->running)
2216     {
2217         yaz_log (LOG_DEBUG, "task already running");
2218         return 0;
2219     }
2220     task->running = 1;
2221     ret = zoom_complete;
2222     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2223     {
2224         switch (task->which)
2225         {
2226         case ZOOM_TASK_SEARCH:
2227             if (c->proto == PROTO_HTTP)
2228                 ret = ZOOM_connection_srw_send_search(c);
2229             else
2230                 ret = ZOOM_connection_send_search(c);
2231             break;
2232         case ZOOM_TASK_RETRIEVE:
2233             if (c->proto == PROTO_HTTP)
2234                 ret = ZOOM_connection_srw_send_search(c);
2235             else
2236                 ret = send_present (c);
2237             break;
2238         case ZOOM_TASK_CONNECT:
2239             ret = do_connect(c);
2240             break;
2241         case ZOOM_TASK_SCAN:
2242             ret = send_scan(c);
2243             break;
2244         case ZOOM_TASK_PACKAGE:
2245             ret = send_package(c);
2246             break;
2247         }
2248     }
2249     else
2250     {
2251         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2252         ZOOM_connection_remove_tasks (c);
2253     }
2254     if (ret == zoom_complete)
2255     {
2256         yaz_log (LOG_DEBUG, "task removed (complete)");
2257         ZOOM_connection_remove_task (c);
2258         return 0;
2259     }
2260     yaz_log (LOG_DEBUG, "task pending");
2261     return 1;
2262 }
2263
2264 static zoom_ret send_sort_present (ZOOM_connection c)
2265 {
2266     zoom_ret r = send_sort (c);
2267     if (r == zoom_complete)
2268         r = send_present (c);
2269     return r;
2270 }
2271
2272 static int es_response (ZOOM_connection c,
2273                         Z_ExtendedServicesResponse *res)
2274 {
2275     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2276         return 0;
2277     if (res->diagnostics && res->num_diagnostics > 0)
2278         response_diag(c, res->diagnostics[0]);
2279     if (res->taskPackage &&
2280         res->taskPackage->which == Z_External_extendedService)
2281     {
2282         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2283         Odr_oct *id = taskPackage->targetReference;
2284
2285         if (id)
2286             ZOOM_options_setl (c->tasks->u.package->options,
2287                                "targetReference", (char*) id->buf, id->len);
2288     }
2289     return 1;
2290 }
2291
2292
2293 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2294 {
2295     Z_InitResponse *initrs;
2296
2297     c->mask = 0;
2298     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2299     switch(apdu->which)
2300     {
2301     case Z_APDU_initResponse:
2302         initrs = apdu->u.initResponse;
2303         ZOOM_connection_option_set(c, "targetImplementationId",
2304                                    initrs->implementationId ?
2305                                    initrs->implementationId : "");
2306         ZOOM_connection_option_set(c, "targetImplementationName",
2307                                    initrs->implementationName ?
2308                                    initrs->implementationName : "");
2309         ZOOM_connection_option_set(c, "targetImplementationVersion",
2310                                    initrs->implementationVersion ?
2311                                    initrs->implementationVersion : "");
2312         if (!*initrs->result)
2313         {
2314             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2315         }
2316         else
2317         {
2318             char *cookie =
2319                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2320                                           VAL_COOKIE, 1, 0);
2321             xfree (c->cookie_in);
2322             c->cookie_in = 0;
2323             if (cookie)
2324                 c->cookie_in = xstrdup(cookie);
2325             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2326                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2327                 c->support_named_resultsets = 1;
2328             if (c->tasks)
2329             {
2330                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2331                 ZOOM_connection_remove_task (c);
2332             }
2333             ZOOM_connection_exec_task (c);
2334         }
2335         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2336         {
2337             NMEM tmpmem = nmem_create();
2338             Z_CharSetandLanguageNegotiation *p =
2339                 yaz_get_charneg_record(initrs->otherInfo);
2340
2341             if (p)
2342             {
2343                 char *charset=NULL, *lang=NULL;
2344                 int sel;
2345
2346                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2347                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2348                         "language %s, select %d",
2349                         charset ? charset : "none", lang ? lang : "none", sel);
2350                 if (charset)
2351                     ZOOM_connection_option_set (c, "negotiation-charset",
2352                                                 charset);
2353                 if (lang)
2354                     ZOOM_connection_option_set (c, "negotiation-lang",
2355                                                 lang);
2356                 nmem_destroy(tmpmem);
2357             }
2358         }
2359         break;
2360     case Z_APDU_searchResponse:
2361         handle_search_response (c, apdu->u.searchResponse);
2362         if (send_sort_present (c) == zoom_complete)
2363             ZOOM_connection_remove_task (c);
2364         break;
2365     case Z_APDU_presentResponse:
2366         handle_present_response (c, apdu->u.presentResponse);
2367         if (send_present (c) == zoom_complete)
2368             ZOOM_connection_remove_task (c);
2369         break;
2370     case Z_APDU_sortResponse:
2371         sort_response (c, apdu->u.sortResponse);
2372         if (send_present (c) == zoom_complete)
2373             ZOOM_connection_remove_task (c);
2374         break;
2375     case Z_APDU_scanResponse:
2376         scan_response (c, apdu->u.scanResponse);
2377         ZOOM_connection_remove_task (c);
2378         break;
2379     case Z_APDU_extendedServicesResponse:
2380         es_response (c, apdu->u.extendedServicesResponse);
2381         ZOOM_connection_remove_task (c);
2382         break;
2383     case Z_APDU_close:
2384         if (c->reconnect_ok)
2385         {
2386             do_close(c);
2387             c->tasks->running = 0;
2388             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2389         }
2390         else
2391         {
2392             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2393             do_close(c);
2394         }
2395         break;
2396     default:
2397         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2398         do_close(c);
2399     }
2400 }
2401
2402 #if HAVE_XML2
2403 static void handle_srw_response(ZOOM_connection c,
2404                                 Z_SRW_searchRetrieveResponse *res)
2405 {
2406     ZOOM_resultset resultset = 0;
2407     int i;
2408     NMEM nmem;
2409
2410     if (!c->tasks)
2411         return;
2412
2413     if (c->tasks->which == ZOOM_TASK_SEARCH)
2414         resultset = c->tasks->u.search.resultset;
2415     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2416         resultset = c->tasks->u.retrieve.resultset;
2417     else
2418         return ;
2419
2420     resultset->size = 0;
2421
2422     yaz_log(LOG_DEBUG, "got SRW response OK");
2423
2424     if (res->numberOfRecords)
2425         resultset->size = *res->numberOfRecords;
2426
2427     for (i = 0; i<res->num_records; i++)
2428     {
2429         int pos;
2430
2431         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2432             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2433
2434         if (res->records[i].recordPosition &&
2435             *res->records[i].recordPosition > 0)
2436             pos = *res->records[i].recordPosition - 1;
2437         else
2438             pos = resultset->start + i;
2439
2440         npr->databaseName = 0;
2441         npr->which = Z_NamePlusRecord_databaseRecord;
2442         npr->u.databaseRecord = (Z_External *)
2443             odr_malloc(c->odr_in, sizeof(Z_External));
2444         npr->u.databaseRecord->descriptor = 0;
2445         npr->u.databaseRecord->direct_reference =
2446             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2447         npr->u.databaseRecord->which = Z_External_octet;
2448         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2449             odr_malloc(c->odr_in, sizeof(Odr_oct));
2450         npr->u.databaseRecord->u.octet_aligned->buf =
2451             res->records[i].recordData_buf;
2452         npr->u.databaseRecord->u.octet_aligned->len =
2453             npr->u.databaseRecord->u.octet_aligned->size =
2454             res->records[i].recordData_len;
2455         record_cache_add (resultset, npr, pos);
2456     }
2457     if (res->num_diagnostics > 0)
2458     {
2459         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2460                        res->diagnostics[0].details, 0);
2461     }
2462     nmem = odr_extract_mem(c->odr_in);
2463     nmem_transfer(resultset->odr->mem, nmem);
2464     nmem_destroy(nmem);
2465 }
2466 #endif
2467
2468 #if HAVE_XML2
2469 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2470 {
2471     int ret = -1;
2472     const char *content_type = z_HTTP_header_lookup(hres->headers,
2473                                                     "Content-Type");
2474     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2475                                                        "Connection");
2476     c->mask = 0;
2477     yaz_log (LOG_DEBUG, "handle_http");
2478
2479     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2480     {
2481         Z_SOAP *soap_package = 0;
2482         ODR o = odr_createmem(ODR_DECODE);
2483         Z_SOAP_Handler soap_handlers[2] = {
2484             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2485              (Z_SOAP_fun) yaz_srw_codec},
2486             {0, 0, 0}
2487         };
2488         ret = z_soap_codec(o, &soap_package,
2489                            &hres->content_buf, &hres->content_len,
2490                            soap_handlers);
2491         if (!ret && soap_package->which == Z_SOAP_generic &&
2492             soap_package->u.generic->no == 0)
2493         {
2494             Z_SRW_PDU *sr = soap_package->u.generic->p;
2495             if (sr->which == Z_SRW_searchRetrieve_response)
2496                 handle_srw_response(c, sr->u.response);
2497             else
2498                 ret = -1;
2499         }
2500         else if (!ret && (soap_package->which == Z_SOAP_fault
2501                           || soap_package->which == Z_SOAP_error))
2502         {
2503             set_HTTP_error(c, hres->code,
2504                            soap_package->u.fault->fault_code,
2505                            soap_package->u.fault->fault_string);
2506         }
2507         else
2508             ret = -1;
2509         odr_destroy(o);
2510     }
2511     if (ret)
2512     {
2513         if (hres->code != 200)
2514             set_HTTP_error(c, hres->code, 0, 0);
2515         else
2516             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2517         do_close (c);
2518     }
2519     ZOOM_connection_remove_task(c);
2520     if (!strcmp(hres->version, "1.0"))
2521     {
2522         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2523         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2524             do_close(c);
2525     }
2526     else
2527     {
2528         /* HTTP 1.1: only if no close we stay alive .. */
2529         if (connection_head && !strcmp(connection_head, "close"))
2530             do_close(c);
2531     }
2532 }
2533 #endif
2534
2535 static int do_read (ZOOM_connection c)
2536 {
2537     int r;
2538     ZOOM_Event event;
2539
2540     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2541     ZOOM_connection_put_event (c, event);
2542
2543     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2544
2545     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2546     if (r == 1)
2547         return 0;
2548     if (r <= 0)
2549     {
2550         if (c->reconnect_ok)
2551         {
2552             do_close (c);
2553             c->reconnect_ok = 0;
2554             yaz_log (LOG_DEBUG, "reconnect read");
2555             c->tasks->running = 0;
2556             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2557         }
2558         else
2559         {
2560             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2561             do_close (c);
2562         }
2563     }
2564     else
2565     {
2566         Z_GDU *gdu;
2567         ZOOM_Event event;
2568         odr_reset (c->odr_in);
2569         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2570         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2571         ZOOM_connection_put_event (c, event);
2572
2573         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2574         {
2575             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2576             do_close (c);
2577         }
2578         else if (gdu->which == Z_GDU_Z3950)
2579             handle_apdu (c, gdu->u.z3950);
2580         else if (gdu->which == Z_GDU_HTTP_Response)
2581         {
2582 #if HAVE_XML2
2583             handle_http (c, gdu->u.HTTP_Response);
2584 #else
2585             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2586             do_close (c);
2587 #endif
2588         }
2589         c->reconnect_ok = 0;
2590     }
2591     return 1;
2592 }
2593
2594 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2595 {
2596     int r;
2597     ZOOM_Event event;
2598
2599     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2600     ZOOM_connection_put_event (c, event);
2601
2602     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2603     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2604     {
2605         if (c->reconnect_ok)
2606         {
2607             do_close (c);
2608             c->reconnect_ok = 0;
2609             yaz_log (LOG_DEBUG, "reconnect write");
2610             c->tasks->running = 0;
2611             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2612             return zoom_pending;
2613         }
2614         if (c->state == STATE_CONNECTING)
2615             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2616         else
2617             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2618         do_close (c);
2619         return zoom_complete;
2620     }
2621     else if (r == 1)
2622     {
2623         c->mask = ZOOM_SELECT_EXCEPT;
2624         if (c->cs->io_pending & CS_WANT_WRITE)
2625             c->mask += ZOOM_SELECT_WRITE;
2626         if (c->cs->io_pending & CS_WANT_READ)
2627             c->mask += ZOOM_SELECT_READ;
2628         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2629     }
2630     else
2631     {
2632         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2633         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2634     }
2635     return zoom_pending;
2636 }
2637
2638 static zoom_ret do_write(ZOOM_connection c)
2639 {
2640     return do_write_ex (c, c->buf_out, c->len_out);
2641 }
2642
2643
2644 ZOOM_API(const char *)
2645 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2646 {
2647     return ZOOM_options_get (c->options, key);
2648 }
2649
2650 ZOOM_API(void)
2651 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2652                                   const char *val)
2653 {
2654     ZOOM_options_set (c->options, key, val);
2655 }
2656
2657 ZOOM_API(const char *)
2658 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2659 {
2660     return ZOOM_options_get (r->options, key);
2661 }
2662
2663 ZOOM_API(void)
2664 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2665                                   const char *val)
2666 {
2667     ZOOM_options_set (r->options, key, val);
2668 }
2669
2670
2671 ZOOM_API(int)
2672 ZOOM_connection_errcode (ZOOM_connection c)
2673 {
2674     return ZOOM_connection_error (c, 0, 0);
2675 }
2676
2677 ZOOM_API(const char *)
2678 ZOOM_connection_errmsg (ZOOM_connection c)
2679 {
2680     const char *msg;
2681     ZOOM_connection_error (c, &msg, 0);
2682     return msg;
2683 }
2684
2685 ZOOM_API(const char *)
2686 ZOOM_connection_addinfo (ZOOM_connection c)
2687 {
2688     const char *addinfo;
2689     ZOOM_connection_error (c, 0, &addinfo);
2690     return addinfo;
2691 }
2692
2693 ZOOM_API(const char *)
2694 ZOOM_diag_str (int error)
2695 {
2696     switch (error)
2697     {
2698     case ZOOM_ERROR_NONE:
2699         return "No error";
2700     case ZOOM_ERROR_CONNECT:
2701         return "Connect failed";
2702     case ZOOM_ERROR_MEMORY:
2703         return "Out of memory";
2704     case ZOOM_ERROR_ENCODE:
2705         return "Encoding failed";
2706     case ZOOM_ERROR_DECODE:
2707         return "Decoding failed";
2708     case ZOOM_ERROR_CONNECTION_LOST:
2709         return "Connection lost";
2710     case ZOOM_ERROR_INIT:
2711         return "Init rejected";
2712     case ZOOM_ERROR_INTERNAL:
2713         return "Internal failure";
2714     case ZOOM_ERROR_TIMEOUT:
2715         return "Timeout";
2716     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2717         return "Unsupported protocol";
2718     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2719         return "Unsupported query type";
2720     default:
2721         return diagbib1_str (error);
2722     }
2723 }
2724
2725 ZOOM_API(int)
2726 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2727                          const char **addinfo, const char **diagset)
2728 {
2729     int error = c->error;
2730     if (cp)
2731     {
2732         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2733             *cp = ZOOM_diag_str(error);
2734         else if (!strcmp(c->diagset, "HTTP"))
2735             *cp = z_HTTP_errmsg(c->error);
2736         else if (!strcmp(c->diagset, "Bib-1"))
2737             *cp = ZOOM_diag_str(error);
2738         else if (!strcmp(c->diagset, "SRW"))
2739             *cp = yaz_diag_srw_str(c->error);
2740         else
2741             *cp = "Unknown error and diagnostic set";
2742     }
2743     if (addinfo)
2744         *addinfo = c->addinfo ? c->addinfo : "";
2745     if (diagset)
2746         *diagset = c->diagset ? c->diagset : "";
2747     return c->error;
2748 }
2749
2750 ZOOM_API(int)
2751 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2752                        const char **addinfo)
2753 {
2754     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2755 }
2756
2757 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2758 {
2759     ZOOM_Event event = 0;
2760     int r = cs_look(c->cs);
2761     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2762              c, mask, r);
2763
2764     if (r == CS_NONE)
2765     {
2766         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2767         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2768         do_close (c);
2769         ZOOM_connection_put_event (c, event);
2770     }
2771     else if (r == CS_CONNECT)
2772     {
2773         int ret;
2774         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2775
2776         ret = cs_rcvconnect (c->cs);
2777         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2778         if (ret == 1)
2779         {
2780             c->mask = ZOOM_SELECT_EXCEPT;
2781             if (c->cs->io_pending & CS_WANT_WRITE)
2782                 c->mask += ZOOM_SELECT_WRITE;
2783             if (c->cs->io_pending & CS_WANT_READ)
2784                 c->mask += ZOOM_SELECT_READ;
2785             ZOOM_connection_put_event (c, event);
2786         }
2787         else if (ret == 0)
2788         {
2789             ZOOM_connection_put_event (c, event);
2790             if (c->proto == PROTO_Z3950)
2791                 ZOOM_connection_send_init(c);
2792             else
2793             {
2794                 /* no init request for SRW .. */
2795                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2796                 ZOOM_connection_remove_task (c);
2797                 c->mask = 0;
2798                 ZOOM_connection_exec_task (c);
2799             }
2800             c->state = STATE_ESTABLISHED;
2801         }
2802         else
2803         {
2804             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2805             do_close (c);
2806             ZOOM_connection_put_event (c, event);
2807         }
2808     }
2809     else
2810     {
2811         if (mask & ZOOM_SELECT_READ)
2812             do_read (c);
2813         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2814             do_write (c);
2815     }
2816     return 1;
2817 }
2818
2819 ZOOM_API(int)
2820 ZOOM_connection_last_event(ZOOM_connection cs)
2821 {
2822     if (!cs)
2823         return ZOOM_EVENT_NONE;
2824     return cs->last_event;
2825 }
2826
2827 ZOOM_API(int)
2828 ZOOM_event (int no, ZOOM_connection *cs)
2829 {
2830     int timeout = 5000;
2831 #if HAVE_SYS_POLL_H
2832     struct pollfd pollfds[1024];
2833     ZOOM_connection poll_cs[1024];
2834 #else
2835     struct timeval tv;
2836     fd_set input, output, except;
2837 #endif
2838     int i, r, nfds;
2839     int max_fd = 0;
2840
2841     for (i = 0; i<no; i++)
2842     {
2843         ZOOM_connection c = cs[i];
2844         ZOOM_Event event;
2845         if (c && (event = ZOOM_connection_get_event(c)))
2846         {
2847             ZOOM_Event_destroy (event);
2848             return i+1;
2849         }
2850     }
2851     for (i = 0; i<no; i++)
2852     {
2853         ZOOM_connection c = cs[i];
2854         ZOOM_Event event;
2855         if (c && ZOOM_connection_exec_task (c))
2856         {
2857             if ((event = ZOOM_connection_get_event(c)))
2858             {
2859                 ZOOM_Event_destroy (event);
2860                 return i+1;
2861             }
2862         }
2863     }
2864 #if HAVE_SYS_POLL_H
2865
2866 #else
2867     FD_ZERO (&input);
2868     FD_ZERO (&output);
2869     FD_ZERO (&except);
2870 #endif
2871     nfds = 0;
2872     for (i = 0; i<no; i++)
2873     {
2874         ZOOM_connection c = cs[i];
2875         int fd, mask;
2876         int this_timeout;
2877
2878         if (!c)
2879             continue;
2880         fd = z3950_connection_socket(c);
2881         mask = z3950_connection_mask(c);
2882
2883         if (fd == -1)
2884             continue;
2885         if (max_fd < fd)
2886             max_fd = fd;
2887
2888         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2889         if (this_timeout != -1 && this_timeout < timeout)
2890             timeout = this_timeout;
2891 #if HAVE_SYS_POLL_H
2892         if (mask)
2893         {
2894             short poll_events = 0;
2895
2896             if (mask & ZOOM_SELECT_READ)
2897                 poll_events += POLLIN;
2898             if (mask & ZOOM_SELECT_WRITE)
2899                 poll_events += POLLOUT;
2900             if (mask & ZOOM_SELECT_EXCEPT)
2901                 poll_events += POLLERR;
2902             pollfds[nfds].fd = fd;
2903             pollfds[nfds].events = poll_events;
2904             pollfds[nfds].revents = 0;
2905             poll_cs[nfds] = c;
2906             nfds++;
2907         }
2908 #else
2909         if (mask & ZOOM_SELECT_READ)
2910         {
2911             FD_SET (fd, &input);
2912             nfds++;
2913         }
2914         if (mask & ZOOM_SELECT_WRITE)
2915         {
2916             FD_SET (fd, &output);
2917             nfds++;
2918         }
2919         if (mask & ZOOM_SELECT_EXCEPT)
2920         {
2921             FD_SET (fd, &except);
2922             nfds++;
2923         }
2924 #endif
2925     }
2926     if (timeout >= 5000)
2927         timeout = 30;
2928
2929     if (!nfds)
2930         return 0;
2931
2932 #if HAVE_SYS_POLL_H
2933     r = poll (pollfds, nfds, timeout * 1000);
2934     for (i = 0; i<nfds; i++)
2935     {
2936         ZOOM_connection c = poll_cs[i];
2937         if (r && c->mask)
2938         {
2939             int mask = 0;
2940             if (pollfds[i].revents & POLLIN)
2941                 mask += ZOOM_SELECT_READ;
2942             if (pollfds[i].revents & POLLOUT)
2943                 mask += ZOOM_SELECT_WRITE;
2944             if (pollfds[i].revents & POLLERR)
2945                 mask += ZOOM_SELECT_EXCEPT;
2946             if (mask)
2947                 ZOOM_connection_do_io(c, mask);
2948         }
2949         else if (r == 0 && c->mask)
2950         {
2951             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2952             /* timeout and this connection was waiting */
2953             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2954             do_close (c);
2955             ZOOM_connection_put_event(c, event);
2956         }
2957     }
2958 #else
2959     tv.tv_sec = timeout;
2960     tv.tv_usec = 0;
2961     yaz_log (LOG_DEBUG, "select start");
2962     r = select (max_fd+1, &input, &output, &except, &tv);
2963     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2964     for (i = 0; i<no; i++)
2965     {
2966         ZOOM_connection c = cs[i];
2967         int fd, mask;
2968
2969         if (!c)
2970             continue;
2971         fd = z3950_connection_socket(c);
2972         mask = 0;
2973         if (r && c->mask)
2974         {
2975             /* no timeout and real socket */
2976             if (FD_ISSET(fd, &input))
2977                 mask += ZOOM_SELECT_READ;
2978             if (FD_ISSET(fd, &output))
2979                 mask += ZOOM_SELECT_WRITE;
2980             if (FD_ISSET(fd, &except))
2981                 mask += ZOOM_SELECT_EXCEPT;
2982             if (mask)
2983                 ZOOM_connection_do_io(c, mask);
2984         }
2985         if (r == 0 && c->mask)
2986         {
2987             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2988             /* timeout and this connection was waiting */
2989             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2990             do_close (c);
2991             yaz_log (LOG_DEBUG, "timeout");
2992             ZOOM_connection_put_event(c, event);
2993         }
2994     }
2995 #endif
2996     for (i = 0; i<no; i++)
2997     {
2998         ZOOM_connection c = cs[i];
2999         ZOOM_Event event;
3000         if (c && (event = ZOOM_connection_get_event(c)))
3001         {
3002             ZOOM_Event_destroy (event);
3003             return i+1;
3004         }
3005     }
3006     return 0;
3007 }