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 1.26 2003-02-20 15:11:38 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_SRW)
 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_SRW)
 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_SRW;
 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_searchRetrieve *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_searchRetrieve *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         sr->u.request->query = resultset->query->z_query->u.type_104->u.cql;
1070     }
1071     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1072              resultset->query->z_query->u.type_1)
1073     {
1074         sr->u.request->pQuery = resultset->query->query_string;
1075     }
1076     else
1077     {
1078         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1079         return zoom_complete;
1080     }
1081     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1082     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1083     sr->u.request->recordSchema = resultset->schema;
1084
1085
1086     return send_srw(c, sr);
1087 }
1088 #else
1089 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1090 {
1091     return zoom_complete;
1092 }
1093 #endif
1094
1095 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1096 {
1097     ZOOM_resultset r;
1098     int lslb, ssub, mspn;
1099     const char *syntax;
1100     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1101     Z_SearchRequest *search_req = apdu->u.searchRequest;
1102     const char *elementSetName;
1103     const char *smallSetElementSetName;
1104     const char *mediumSetElementSetName;
1105
1106     assert (c->tasks);
1107     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1108
1109     r = c->tasks->u.search.resultset;
1110
1111     elementSetName =
1112         ZOOM_options_get (r->options, "elementSetName");
1113     smallSetElementSetName  =
1114         ZOOM_options_get (r->options, "smallSetElementSetName");
1115     mediumSetElementSetName =
1116         ZOOM_options_get (r->options, "mediumSetElementSetName");
1117
1118     if (!smallSetElementSetName)
1119         smallSetElementSetName = elementSetName;
1120
1121     if (!mediumSetElementSetName)
1122         mediumSetElementSetName = elementSetName;
1123
1124     assert (r);
1125     assert (r->query);
1126
1127     /* prepare query for the search request */
1128     search_req->query = r->query->z_query;
1129
1130     search_req->databaseNames =
1131         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1132
1133     /* get syntax (no need to provide unless piggyback is in effect) */
1134     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1135
1136     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1137     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1138     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1139     if (lslb != -1 && ssub != -1 && mspn != -1)
1140     {
1141         /* So're a Z39.50 expert? Let's hope you don't do sort */
1142         *search_req->largeSetLowerBound = lslb;
1143         *search_req->smallSetUpperBound = ssub;
1144         *search_req->mediumSetPresentNumber = mspn;
1145     }
1146     else if (r->start == 0 && r->count > 0
1147              && r->piggyback && !r->r_sort_spec && !r->schema)
1148     {
1149         /* Regular piggyback - do it unless we're going to do sort */
1150         *search_req->largeSetLowerBound = 2000000000;
1151         *search_req->smallSetUpperBound = 0;
1152         *search_req->mediumSetPresentNumber = r->count;
1153         smallSetElementSetName = 0;
1154     }
1155     else
1156     {
1157         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1158         smallSetElementSetName = 0;
1159         mediumSetElementSetName = 0;
1160         syntax = 0;
1161     }
1162     if (smallSetElementSetName && *smallSetElementSetName)
1163     {
1164         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1165             odr_malloc (c->odr_out, sizeof(*esn));
1166
1167         esn->which = Z_ElementSetNames_generic;
1168         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1169         search_req->smallSetElementSetNames = esn;
1170     }
1171     if (mediumSetElementSetName && *mediumSetElementSetName)
1172     {
1173         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1174             odr_malloc (c->odr_out, sizeof(*esn));
1175
1176         esn->which = Z_ElementSetNames_generic;
1177         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1178         search_req->mediumSetElementSetNames = esn;
1179     }
1180     if (syntax)
1181         search_req->preferredRecordSyntax =
1182             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1183
1184     if (!r->setname)
1185     {
1186         if (c->support_named_resultsets)
1187         {
1188             char setname[14];
1189             int ord;
1190             /* find the lowest unused ordinal so that we re-use
1191                result sets on the server. */
1192             for (ord = 1; ; ord++)
1193             {
1194                 ZOOM_resultset rp;
1195                 sprintf (setname, "%d", ord);
1196                 for (rp = c->resultsets; rp; rp = rp->next)
1197                     if (rp->setname && !strcmp (rp->setname, setname))
1198                         break;
1199                 if (!rp)
1200                     break;
1201             }
1202             r->setname = xstrdup (setname);
1203             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1204         }
1205         else
1206             r->setname = xstrdup ("default");
1207         ZOOM_options_set (r->options, "setname", r->setname);
1208     }
1209     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1210     /* send search request */
1211     return send_APDU (c, apdu);
1212 }
1213
1214 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1215 {
1216     int oclass;
1217     Z_DefaultDiagFormat *r;
1218     char *addinfo = 0;
1219
1220     xfree (c->addinfo);
1221     c->addinfo = 0;
1222     if (p->which != Z_DiagRec_defaultFormat)
1223     {
1224         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1225         return;
1226     }
1227     r = p->u.defaultFormat;
1228     switch (r->which)
1229     {
1230     case Z_DefaultDiagFormat_v2Addinfo:
1231         addinfo = r->u.v2Addinfo;
1232         break;
1233     case Z_DefaultDiagFormat_v3Addinfo:
1234         addinfo = r->u.v3Addinfo;
1235         break;
1236     }
1237     set_dset_error(c, *r->condition,
1238                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1239                    addinfo, 0);
1240 }
1241
1242 ZOOM_API(ZOOM_record)
1243 ZOOM_record_clone (ZOOM_record srec)
1244 {
1245     char *buf;
1246     int size;
1247     ODR odr_enc;
1248     ZOOM_record nrec;
1249
1250     odr_enc = odr_createmem(ODR_ENCODE);
1251     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1252         return 0;
1253     buf = odr_getbuf (odr_enc, &size, 0);
1254
1255     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1256     nrec->odr = odr_createmem(ODR_DECODE);
1257     nrec->wrbuf_marc = 0;
1258     odr_setbuf (nrec->odr, buf, size, 0);
1259     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1260
1261     odr_destroy (odr_enc);
1262     return nrec;
1263 }
1264
1265 ZOOM_API(ZOOM_record)
1266 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1267 {
1268     return record_cache_lookup (s, pos);
1269 }
1270
1271 ZOOM_API(ZOOM_record)
1272 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1273 {
1274     ZOOM_resultset_retrieve (r, 1, pos, 1);
1275     return ZOOM_resultset_record_immediate (r, pos);
1276 }
1277
1278 ZOOM_API(void)
1279 ZOOM_record_destroy (ZOOM_record rec)
1280 {
1281     if (!rec)
1282         return;
1283     if (rec->wrbuf_marc)
1284         wrbuf_free (rec->wrbuf_marc, 1);
1285     odr_destroy (rec->odr);
1286     xfree (rec);
1287 }
1288
1289 ZOOM_API(const char *)
1290 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1291 {
1292     Z_NamePlusRecord *npr;
1293
1294     if (len)
1295         *len = 0; /* default return */
1296
1297     if (!rec)
1298         return 0;
1299     npr = rec->npr;
1300     if (!npr)
1301         return 0;
1302     if (!strcmp (type, "database"))
1303     {
1304         if (len)
1305             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1306         return npr->databaseName;
1307     }
1308     else if (!strcmp (type, "syntax"))
1309     {
1310         const char *desc = 0;
1311         if (npr->which == Z_NamePlusRecord_databaseRecord)
1312         {
1313             Z_External *r = (Z_External *) npr->u.databaseRecord;
1314             oident *ent = oid_getentbyoid(r->direct_reference);
1315             if (ent)
1316                 desc = ent->desc;
1317         }
1318         if (!desc)
1319             desc = "none";
1320         if (len)
1321             *len = strlen(desc);
1322         return desc;
1323     }
1324     else if (!strcmp (type, "render") &&
1325              npr->which == Z_NamePlusRecord_databaseRecord)
1326     {
1327         Z_External *r = (Z_External *) npr->u.databaseRecord;
1328         oident *ent = oid_getentbyoid(r->direct_reference);
1329
1330         if (r->which == Z_External_sutrs)
1331         {
1332             if (len) *len = r->u.sutrs->len;
1333             return (const char *) r->u.sutrs->buf;
1334         }
1335         else if (r->which == Z_External_octet)
1336         {
1337             yaz_marc_t mt;
1338             switch (ent->value)
1339             {
1340             case VAL_SOIF:
1341             case VAL_HTML:
1342             case VAL_SUTRS:
1343                 break;
1344             case VAL_TEXT_XML:
1345             case VAL_APPLICATION_XML:
1346                 break;
1347             default:
1348                 if (!rec->wrbuf_marc)
1349                     rec->wrbuf_marc = wrbuf_alloc();
1350
1351                 mt = yaz_marc_create();
1352                 wrbuf_rewind (rec->wrbuf_marc);
1353                 if (yaz_marc_decode_wrbuf (
1354                         mt, (const char *) r->u.octet_aligned->buf,
1355                         r->u.octet_aligned->len,
1356                         rec->wrbuf_marc) > 0)
1357                 {
1358                     if (len)
1359                         *len = wrbuf_len(rec->wrbuf_marc);
1360                     yaz_marc_destroy(mt);
1361                     return wrbuf_buf(rec->wrbuf_marc);
1362                 }
1363                 yaz_marc_destroy(mt);
1364             }
1365             if (len)
1366                 *len = r->u.octet_aligned->len;
1367             return (const char *) r->u.octet_aligned->buf;
1368         }
1369         else if (r->which == Z_External_grs1)
1370         {
1371             if (!rec->wrbuf_marc)
1372                 rec->wrbuf_marc = wrbuf_alloc();
1373             wrbuf_rewind (rec->wrbuf_marc);
1374             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1375             if (len)
1376                 *len = wrbuf_len(rec->wrbuf_marc);
1377             return wrbuf_buf(rec->wrbuf_marc);
1378         }
1379         return 0;
1380     }
1381     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1382              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1383     {
1384         Z_External *r = (Z_External *) npr->u.databaseRecord;
1385         oident *ent = oid_getentbyoid(r->direct_reference);
1386
1387         if (r->which == Z_External_sutrs)
1388         {
1389             if (len) *len = r->u.sutrs->len;
1390             return (const char *) r->u.sutrs->buf;
1391         }
1392         else if (r->which == Z_External_octet)
1393         {
1394             yaz_marc_t mt;
1395             int marc_decode_type = YAZ_MARC_MARCXML;
1396
1397             if (!strcmp(type, "oai"))
1398                 marc_decode_type = YAZ_MARC_OAIMARC;
1399             switch (ent->value)
1400             {
1401             case VAL_SOIF:
1402             case VAL_HTML:
1403             case VAL_SUTRS:
1404                 break;
1405             case VAL_TEXT_XML:
1406             case VAL_APPLICATION_XML:
1407                 break;
1408             default:
1409                 if (!rec->wrbuf_marc)
1410                     rec->wrbuf_marc = wrbuf_alloc();
1411                 wrbuf_rewind (rec->wrbuf_marc);
1412                 mt = yaz_marc_create();
1413
1414                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1415                 if (yaz_marc_decode_wrbuf (
1416                         mt, (const char *) r->u.octet_aligned->buf,
1417                         r->u.octet_aligned->len,
1418                         rec->wrbuf_marc) > 0)
1419                 {
1420                     if (len)
1421                         *len = wrbuf_len(rec->wrbuf_marc);
1422                     yaz_marc_destroy(mt);
1423                     return wrbuf_buf(rec->wrbuf_marc);
1424                 }
1425                 yaz_marc_destroy(mt);
1426             }
1427             if (len) *len = r->u.octet_aligned->len;
1428             return (const char *) r->u.octet_aligned->buf;
1429         }
1430         else if (r->which == Z_External_grs1)
1431         {
1432             if (len) *len = 5;
1433             return "GRS-1";
1434         }
1435         return 0;
1436     }
1437     else if (!strcmp (type, "raw"))
1438     {
1439         if (npr->which == Z_NamePlusRecord_databaseRecord)
1440         {
1441             Z_External *r = (Z_External *) npr->u.databaseRecord;
1442
1443             if (r->which == Z_External_sutrs)
1444             {
1445                 if (len) *len = r->u.sutrs->len;
1446                 return (const char *) r->u.sutrs->buf;
1447             }
1448             else if (r->which == Z_External_octet)
1449             {
1450                 if (len) *len = r->u.octet_aligned->len;
1451                 return (const char *) r->u.octet_aligned->buf;
1452             }
1453             else /* grs-1, explain, ... */
1454             {
1455                 if (len) *len = -1;
1456                 return (const char *) npr->u.databaseRecord;
1457             }
1458         }
1459         return 0;
1460     }
1461     else if (!strcmp (type, "ext"))
1462     {
1463         if (npr->which == Z_NamePlusRecord_databaseRecord)
1464             return (const char *) npr->u.databaseRecord;
1465         return 0;
1466     }
1467     return 0;
1468 }
1469
1470 static int strcmp_null(const char *v1, const char *v2)
1471 {
1472     if (!v1 && !v2)
1473         return 0;
1474     if (!v1 || !v2)
1475         return -1;
1476     return strcmp(v1, v2);
1477 }
1478
1479 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1480                               int pos)
1481 {
1482     ZOOM_record_cache rc;
1483     const char *elementSetName =
1484         ZOOM_resultset_option_get (r, "elementSetName");
1485     const char *syntax =
1486         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1487
1488     for (rc = r->record_cache; rc; rc = rc->next)
1489     {
1490         if (pos == rc->pos)
1491         {
1492             if (strcmp_null(r->schema, rc->schema))
1493                 continue;
1494             if (strcmp_null(elementSetName,rc->elementSetName))
1495                 continue;
1496             if (strcmp_null(syntax, rc->syntax))
1497                 continue;
1498             /* not destroying rc->npr (it's handled by nmem )*/
1499             rc->rec.npr = npr;
1500             /* keeping wrbuf_marc too */
1501             return;
1502         }
1503     }
1504     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1505     rc->rec.npr = npr;
1506     rc->rec.odr = 0;
1507     rc->rec.wrbuf_marc = 0;
1508     if (elementSetName)
1509         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1510     else
1511         rc->elementSetName = 0;
1512
1513     if (syntax)
1514         rc->syntax = odr_strdup (r->odr, syntax);
1515     else
1516         rc->syntax = 0;
1517
1518     if (r->schema)
1519         rc->schema = odr_strdup (r->odr, r->schema);
1520     else
1521         rc->schema = 0;
1522
1523     rc->pos = pos;
1524     rc->next = r->record_cache;
1525     r->record_cache = rc;
1526 }
1527
1528 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1529 {
1530     ZOOM_record_cache rc;
1531     const char *elementSetName =
1532         ZOOM_resultset_option_get (r, "elementSetName");
1533     const char *syntax =
1534         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1535
1536     for (rc = r->record_cache; rc; rc = rc->next)
1537     {
1538         if (pos == rc->pos)
1539         {
1540             if (strcmp_null(r->schema, rc->schema))
1541                 continue;
1542             if (strcmp_null(elementSetName,rc->elementSetName))
1543                 continue;
1544             if (strcmp_null(syntax, rc->syntax))
1545                 continue;
1546             return &rc->rec;
1547         }
1548     }
1549     return 0;
1550 }
1551
1552 static void handle_records (ZOOM_connection c, Z_Records *sr,
1553                             int present_phase)
1554 {
1555     ZOOM_resultset resultset;
1556
1557     if (!c->tasks)
1558         return ;
1559     switch (c->tasks->which)
1560     {
1561     case ZOOM_TASK_SEARCH:
1562         resultset = c->tasks->u.search.resultset;
1563         break;
1564     case ZOOM_TASK_RETRIEVE:
1565         resultset = c->tasks->u.retrieve.resultset;
1566         break;
1567     default:
1568         return;
1569     }
1570     if (sr && sr->which == Z_Records_NSD)
1571     {
1572         Z_DiagRec dr, *dr_p = &dr;
1573         dr.which = Z_DiagRec_defaultFormat;
1574         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1575
1576         response_diag (c, dr_p);
1577     }
1578     else if (sr && sr->which == Z_Records_multipleNSD)
1579     {
1580         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1581             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1582         else
1583             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1584     }
1585     else
1586     {
1587         if (resultset->count + resultset->start > resultset->size)
1588             resultset->count = resultset->size - resultset->start;
1589         if (resultset->count < 0)
1590             resultset->count = 0;
1591         if (sr && sr->which == Z_Records_DBOSD)
1592         {
1593             int i;
1594             NMEM nmem = odr_extract_mem (c->odr_in);
1595             Z_NamePlusRecordList *p =
1596                 sr->u.databaseOrSurDiagnostics;
1597             for (i = 0; i<p->num_records; i++)
1598             {
1599                 record_cache_add (resultset, p->records[i],
1600                                   i+ resultset->start);
1601             }
1602             /* transfer our response to search_nmem .. we need it later */
1603             nmem_transfer (resultset->odr->mem, nmem);
1604             nmem_destroy (nmem);
1605             if (present_phase && p->num_records == 0)
1606             {
1607                 /* present response and we didn't get any records! */
1608                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1609             }
1610         }
1611         else if (present_phase)
1612         {
1613             /* present response and we didn't get any records! */
1614             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1615         }
1616     }
1617 }
1618
1619 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1620 {
1621     handle_records (c, pr->records, 1);
1622 }
1623
1624 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1625 {
1626     ZOOM_resultset resultset;
1627
1628     yaz_log (LOG_DEBUG, "got search response");
1629
1630     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1631         return ;
1632
1633     resultset = c->tasks->u.search.resultset;
1634
1635     resultset->size = *sr->resultCount;
1636     handle_records (c, sr->records, 0);
1637 }
1638
1639 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1640 {
1641     if (res->diagnostics && res->num_diagnostics > 0)
1642         response_diag (c, res->diagnostics[0]);
1643 }
1644
1645 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1646 {
1647     NMEM nmem = odr_extract_mem (c->odr_in);
1648     ZOOM_scanset scan;
1649
1650     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1651         return 0;
1652     scan = c->tasks->u.scan.scan;
1653
1654     if (res->entries && res->entries->nonsurrogateDiagnostics)
1655         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1656     scan->scan_response = res;
1657     nmem_transfer (scan->odr->mem, nmem);
1658     if (res->stepSize)
1659         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1660     if (res->positionOfTerm)
1661         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1662     if (res->scanStatus)
1663         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1664     if (res->numberOfEntriesReturned)
1665         ZOOM_options_set_int (scan->options, "number",
1666                               *res->numberOfEntriesReturned);
1667     nmem_destroy (nmem);
1668     return 1;
1669 }
1670
1671 static zoom_ret send_sort (ZOOM_connection c)
1672 {
1673     ZOOM_resultset  resultset;
1674
1675     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1676         return zoom_complete;
1677
1678     resultset = c->tasks->u.search.resultset;
1679
1680     if (c->error)
1681     {
1682         resultset->r_sort_spec = 0;
1683         return zoom_complete;
1684     }
1685     if (resultset->r_sort_spec)
1686     {
1687         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1688         Z_SortRequest *req = apdu->u.sortRequest;
1689
1690         req->num_inputResultSetNames = 1;
1691         req->inputResultSetNames = (Z_InternationalString **)
1692             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1693         req->inputResultSetNames[0] =
1694             odr_strdup (c->odr_out, resultset->setname);
1695         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1696         req->sortSequence = resultset->r_sort_spec;
1697         resultset->r_sort_spec = 0;
1698         return send_APDU (c, apdu);
1699     }
1700     return zoom_complete;
1701 }
1702
1703 static zoom_ret send_present (ZOOM_connection c)
1704 {
1705     Z_APDU *apdu = 0;
1706     Z_PresentRequest *req = 0;
1707     int i = 0;
1708     const char *syntax = 0;
1709     const char *elementSetName = 0;
1710     ZOOM_resultset  resultset;
1711
1712     if (!c->tasks)
1713         return zoom_complete;
1714
1715     switch (c->tasks->which)
1716     {
1717     case ZOOM_TASK_SEARCH:
1718         resultset = c->tasks->u.search.resultset;
1719         break;
1720     case ZOOM_TASK_RETRIEVE:
1721         resultset = c->tasks->u.retrieve.resultset;
1722         resultset->start = c->tasks->u.retrieve.start;
1723         resultset->count = c->tasks->u.retrieve.count;
1724
1725         if (resultset->start >= resultset->size)
1726             return zoom_complete;
1727         if (resultset->start + resultset->count > resultset->size)
1728             resultset->count = resultset->size - resultset->start;
1729         break;
1730     default:
1731         return zoom_complete;
1732     }
1733
1734     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1735     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1736
1737     if (c->error)                  /* don't continue on error */
1738         return zoom_complete;
1739     if (resultset->start < 0)
1740         return zoom_complete;
1741     for (i = 0; i<resultset->count; i++)
1742     {
1743         ZOOM_record rec =
1744             record_cache_lookup (resultset, i + resultset->start);
1745         if (!rec)
1746             break;
1747     }
1748     if (i == resultset->count)
1749         return zoom_complete;
1750
1751     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1752     req = apdu->u.presentRequest;
1753
1754     resultset->start += i;
1755     resultset->count -= i;
1756     *req->resultSetStartPoint = resultset->start + 1;
1757     *req->numberOfRecordsRequested = resultset->count;
1758     assert (*req->numberOfRecordsRequested > 0);
1759
1760     if (syntax && *syntax)
1761         req->preferredRecordSyntax =
1762             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1763
1764     if (resultset->schema && *resultset->schema)
1765     {
1766         Z_RecordComposition *compo = (Z_RecordComposition *)
1767             odr_malloc (c->odr_out, sizeof(*compo));
1768
1769         req->recordComposition = compo;
1770         compo->which = Z_RecordComp_complex;
1771         compo->u.complex = (Z_CompSpec *)
1772             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1773         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1774             odr_malloc(c->odr_out, sizeof(bool_t));
1775         *compo->u.complex->selectAlternativeSyntax = 0;
1776
1777         compo->u.complex->generic = (Z_Specification *)
1778             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1779
1780         compo->u.complex->generic->which = Z_Schema_oid;
1781         compo->u.complex->generic->schema.oid = (Odr_oid *)
1782             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1783
1784         if (!compo->u.complex->generic->schema.oid)
1785         {
1786             /* OID wasn't a schema! Try record syntax instead. */
1787
1788             compo->u.complex->generic->schema.oid = (Odr_oid *)
1789                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1790         }
1791         if (elementSetName && *elementSetName)
1792         {
1793             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1794                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1795             compo->u.complex->generic->elementSpec->which =
1796                 Z_ElementSpec_elementSetName;
1797             compo->u.complex->generic->elementSpec->u.elementSetName =
1798                 odr_strdup (c->odr_out, elementSetName);
1799         }
1800         else
1801             compo->u.complex->generic->elementSpec = 0;
1802         compo->u.complex->num_dbSpecific = 0;
1803         compo->u.complex->dbSpecific = 0;
1804         compo->u.complex->num_recordSyntax = 0;
1805         compo->u.complex->recordSyntax = 0;
1806     }
1807     else if (elementSetName && *elementSetName)
1808     {
1809         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1810             odr_malloc (c->odr_out, sizeof(*esn));
1811         Z_RecordComposition *compo = (Z_RecordComposition *)
1812             odr_malloc (c->odr_out, sizeof(*compo));
1813
1814         esn->which = Z_ElementSetNames_generic;
1815         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1816         compo->which = Z_RecordComp_simple;
1817         compo->u.simple = esn;
1818         req->recordComposition = compo;
1819     }
1820     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1821     return send_APDU (c, apdu);
1822 }
1823
1824 ZOOM_API(ZOOM_scanset)
1825 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1826 {
1827     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1828
1829     scan->connection = c;
1830     scan->odr = odr_createmem (ODR_DECODE);
1831     scan->options = ZOOM_options_create_with_parent (c->options);
1832     scan->refcount = 1;
1833     scan->scan_response = 0;
1834
1835     if ((scan->termListAndStartPoint =
1836          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1837                       start)))
1838     {
1839         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1840         task->u.scan.scan = scan;
1841
1842         (scan->refcount)++;
1843         if (!c->async)
1844         {
1845             while (ZOOM_event (1, &c))
1846                 ;
1847         }
1848     }
1849     return scan;
1850 }
1851
1852 ZOOM_API(void)
1853 ZOOM_scanset_destroy (ZOOM_scanset scan)
1854 {
1855     if (!scan)
1856         return;
1857     (scan->refcount)--;
1858     if (scan->refcount == 0)
1859     {
1860         odr_destroy (scan->odr);
1861
1862         ZOOM_options_destroy (scan->options);
1863         xfree (scan);
1864     }
1865 }
1866
1867 static zoom_ret send_package (ZOOM_connection c)
1868 {
1869     ZOOM_Event event;
1870     if (!c->tasks)
1871         return zoom_complete;
1872     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1873
1874     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1875     ZOOM_connection_put_event (c, event);
1876
1877     return do_write_ex (c, c->tasks->u.package->buf_out,
1878                         c->tasks->u.package->len_out);
1879 }
1880
1881 static zoom_ret send_scan (ZOOM_connection c)
1882 {
1883     ZOOM_scanset scan;
1884     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1885     Z_ScanRequest *req = apdu->u.scanRequest;
1886     if (!c->tasks)
1887         return zoom_complete;
1888     assert (c->tasks->which == ZOOM_TASK_SCAN);
1889     scan = c->tasks->u.scan.scan;
1890
1891     req->termListAndStartPoint = scan->termListAndStartPoint;
1892     req->attributeSet = scan->attributeSet;
1893
1894     *req->numberOfTermsRequested =
1895         ZOOM_options_get_int(scan->options, "number", 10);
1896
1897     req->preferredPositionInResponse =
1898         odr_intdup (c->odr_out,
1899                     ZOOM_options_get_int(scan->options, "position", 1));
1900
1901     req->stepSize =
1902         odr_intdup (c->odr_out,
1903                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1904
1905     req->databaseNames = set_DatabaseNames (c, scan->options,
1906                                             &req->num_databaseNames);
1907
1908     return send_APDU (c, apdu);
1909 }
1910
1911 ZOOM_API(size_t)
1912 ZOOM_scanset_size (ZOOM_scanset scan)
1913 {
1914     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1915         return 0;
1916     return scan->scan_response->entries->num_entries;
1917 }
1918
1919 ZOOM_API(const char *)
1920 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1921                                int *occ, int *len)
1922 {
1923     const char *term = 0;
1924     size_t noent = ZOOM_scanset_size (scan);
1925     Z_ScanResponse *res = scan->scan_response;
1926
1927     *len = 0;
1928     *occ = 0;
1929     if (pos >= noent)
1930         return 0;
1931     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1932     {
1933         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1934
1935         if (t->term->which == Z_Term_general)
1936         {
1937             term = (const char *) t->term->u.general->buf;
1938             *len = t->term->u.general->len;
1939         }
1940         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1941     }
1942     return term;
1943 }
1944
1945 ZOOM_API(const char *)
1946 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1947 {
1948     return ZOOM_options_get (scan->options, key);
1949 }
1950
1951 ZOOM_API(void)
1952 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1953                               const char *val)
1954 {
1955     ZOOM_options_set (scan->options, key, val);
1956 }
1957
1958 static Z_APDU *create_es_package (ZOOM_package p, int type)
1959 {
1960     const char *str;
1961     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1962     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1963
1964     *req->function = Z_ExtendedServicesRequest_create;
1965
1966     str = ZOOM_options_get(p->options, "package-name");
1967     if (str && *str)
1968         req->packageName = nmem_strdup (p->odr_out->mem, str);
1969
1970     str = ZOOM_options_get(p->options, "user-id");
1971     if (str)
1972         req->userId = nmem_strdup (p->odr_out->mem, str);
1973
1974     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1975                                               type);
1976
1977     str = ZOOM_options_get(p->options, "function");
1978     if (str)
1979     {
1980         if (!strcmp (str, "create"))
1981             *req->function = 1;
1982         if (!strcmp (str, "delete"))
1983             *req->function = 2;
1984         if (!strcmp (str, "modify"))
1985             *req->function = 3;
1986     }
1987     return apdu;
1988 }
1989
1990 static const char *ill_array_lookup (void *clientData, const char *idx)
1991 {
1992     ZOOM_package p = (ZOOM_package) clientData;
1993     return ZOOM_options_get (p->options, idx+4);
1994 }
1995
1996 static Z_External *encode_ill_request (ZOOM_package p)
1997 {
1998     ODR out = p->odr_out;
1999     ILL_Request *req;
2000     Z_External *r = 0;
2001     struct ill_get_ctl ctl;
2002
2003     ctl.odr = p->odr_out;
2004     ctl.clientData = p;
2005     ctl.f = ill_array_lookup;
2006
2007     req = ill_get_ILLRequest(&ctl, "ill", 0);
2008
2009     if (!ill_Request (out, &req, 0, 0))
2010     {
2011         int ill_request_size;
2012         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2013         if (ill_request_buf)
2014             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2015         return 0;
2016     }
2017     else
2018     {
2019         oident oid;
2020         int illRequest_size = 0;
2021         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2022
2023         oid.proto = PROTO_GENERAL;
2024         oid.oclass = CLASS_GENERAL;
2025         oid.value = VAL_ISO_ILL_1;
2026
2027         r = (Z_External *) odr_malloc (out, sizeof(*r));
2028         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2029         r->indirect_reference = 0;
2030         r->descriptor = 0;
2031         r->which = Z_External_single;
2032
2033         r->u.single_ASN1_type = (Odr_oct *)
2034             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2035         r->u.single_ASN1_type->buf = (unsigned char*)
2036             odr_malloc (out, illRequest_size);
2037         r->u.single_ASN1_type->len = illRequest_size;
2038         r->u.single_ASN1_type->size = illRequest_size;
2039         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2040     }
2041     return r;
2042 }
2043
2044 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2045 {
2046     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2047     const char *str;
2048
2049     req->which=Z_IOItemOrder_esRequest;
2050     req->u.esRequest = (Z_IORequest *)
2051         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2052
2053     /* to keep part ... */
2054     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2055         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2056     req->u.esRequest->toKeep->supplDescription = 0;
2057     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2058         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2059
2060     str = ZOOM_options_get(p->options, "contact-name");
2061     req->u.esRequest->toKeep->contact->name = str ?
2062         nmem_strdup (p->odr_out->mem, str) : 0;
2063
2064     str = ZOOM_options_get(p->options, "contact-phone");
2065     req->u.esRequest->toKeep->contact->phone = str ?
2066         nmem_strdup (p->odr_out->mem, str) : 0;
2067
2068     str = ZOOM_options_get(p->options, "contact-email");
2069     req->u.esRequest->toKeep->contact->email = str ?
2070         nmem_strdup (p->odr_out->mem, str) : 0;
2071
2072     req->u.esRequest->toKeep->addlBilling = 0;
2073
2074     /* not to keep part ... */
2075     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2076         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2077
2078     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2079         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2080
2081     str = ZOOM_options_get(p->options, "itemorder-setname");
2082     if (!str)
2083         str = "default";
2084     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2085         nmem_strdup (p->odr_out->mem, str);
2086     req->u.esRequest->notToKeep->resultSetItem->item =
2087         (int *) odr_malloc(p->odr_out, sizeof(int));
2088
2089     str = ZOOM_options_get(p->options, "itemorder-item");
2090     *req->u.esRequest->notToKeep->resultSetItem->item =
2091         (str ? atoi(str) : 1);
2092
2093     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2094
2095     return req;
2096 }
2097
2098 ZOOM_API(void)
2099     ZOOM_package_send (ZOOM_package p, const char *type)
2100 {
2101     Z_APDU *apdu = 0;
2102     ZOOM_connection c;
2103     if (!p)
2104         return;
2105     c = p->connection;
2106     odr_reset (p->odr_out);
2107     xfree (p->buf_out);
2108     p->buf_out = 0;
2109     if (!strcmp(type, "itemorder"))
2110     {
2111         Z_External *r;
2112         apdu = create_es_package (p, VAL_ITEMORDER);
2113         if (apdu)
2114         {
2115             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2116
2117             r->direct_reference =
2118                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2119                                        VAL_ITEMORDER);
2120             r->descriptor = 0;
2121             r->which = Z_External_itemOrder;
2122             r->indirect_reference = 0;
2123             r->u.itemOrder = encode_item_order (p);
2124
2125             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2126         }
2127     }
2128     if (apdu)
2129     {
2130         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2131         {
2132             char *buf;
2133
2134             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2135             task->u.package = p;
2136             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2137             p->buf_out = (char *) xmalloc (p->len_out);
2138             memcpy (p->buf_out, buf, p->len_out);
2139
2140             (p->refcount)++;
2141             if (!c->async)
2142             {
2143                 while (ZOOM_event (1, &c))
2144                     ;
2145             }
2146         }
2147     }
2148 }
2149
2150 ZOOM_API(ZOOM_package)
2151     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2152 {
2153     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2154
2155     p->connection = c;
2156     p->odr_out = odr_createmem (ODR_ENCODE);
2157     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2158     p->refcount = 1;
2159     p->buf_out = 0;
2160     p->len_out = 0;
2161     return p;
2162 }
2163
2164 ZOOM_API(void)
2165     ZOOM_package_destroy(ZOOM_package p)
2166 {
2167     if (!p)
2168         return;
2169     (p->refcount)--;
2170     if (p->refcount == 0)
2171     {
2172         odr_destroy (p->odr_out);
2173         xfree (p->buf_out);
2174
2175         ZOOM_options_destroy (p->options);
2176         xfree (p);
2177     }
2178 }
2179
2180 ZOOM_API(const char *)
2181 ZOOM_package_option_get (ZOOM_package p, const char *key)
2182 {
2183     return ZOOM_options_get (p->options, key);
2184 }
2185
2186
2187 ZOOM_API(void)
2188 ZOOM_package_option_set (ZOOM_package p, const char *key,
2189                               const char *val)
2190 {
2191     ZOOM_options_set (p->options, key, val);
2192 }
2193
2194 static int ZOOM_connection_exec_task (ZOOM_connection c)
2195 {
2196     ZOOM_task task = c->tasks;
2197     zoom_ret ret = zoom_complete;
2198
2199     if (!task)
2200     {
2201         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2202         return 0;
2203     }
2204     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2205              task->which, task->running);
2206     if (c->error != ZOOM_ERROR_NONE)
2207     {
2208         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2209         ZOOM_connection_remove_tasks (c);
2210         return 0;
2211     }
2212     if (task->running)
2213     {
2214         yaz_log (LOG_DEBUG, "task already running");
2215         return 0;
2216     }
2217     task->running = 1;
2218     ret = zoom_complete;
2219     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2220     {
2221         switch (task->which)
2222         {
2223         case ZOOM_TASK_SEARCH:
2224             if (c->proto == PROTO_SRW)
2225                 ret = ZOOM_connection_srw_send_search(c);
2226             else
2227                 ret = ZOOM_connection_send_search(c);
2228             break;
2229         case ZOOM_TASK_RETRIEVE:
2230             if (c->proto == PROTO_SRW)
2231                 ret = ZOOM_connection_srw_send_search(c);
2232             else
2233                 ret = send_present (c);
2234             break;
2235         case ZOOM_TASK_CONNECT:
2236             ret = do_connect(c);
2237             break;
2238         case ZOOM_TASK_SCAN:
2239             ret = send_scan(c);
2240             break;
2241         case ZOOM_TASK_PACKAGE:
2242             ret = send_package(c);
2243             break;
2244         }
2245     }
2246     else
2247     {
2248         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2249         ZOOM_connection_remove_tasks (c);
2250     }
2251     if (ret == zoom_complete)
2252     {
2253         yaz_log (LOG_DEBUG, "task removed (complete)");
2254         ZOOM_connection_remove_task (c);
2255         return 0;
2256     }
2257     yaz_log (LOG_DEBUG, "task pending");
2258     return 1;
2259 }
2260
2261 static zoom_ret send_sort_present (ZOOM_connection c)
2262 {
2263     zoom_ret r = send_sort (c);
2264     if (r == zoom_complete)
2265         r = send_present (c);
2266     return r;
2267 }
2268
2269 static int es_response (ZOOM_connection c,
2270                         Z_ExtendedServicesResponse *res)
2271 {
2272     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2273         return 0;
2274     if (res->diagnostics && res->num_diagnostics > 0)
2275         response_diag(c, res->diagnostics[0]);
2276     if (res->taskPackage &&
2277         res->taskPackage->which == Z_External_extendedService)
2278     {
2279         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2280         Odr_oct *id = taskPackage->targetReference;
2281
2282         if (id)
2283             ZOOM_options_setl (c->tasks->u.package->options,
2284                                "targetReference", (char*) id->buf, id->len);
2285     }
2286     return 1;
2287 }
2288
2289
2290 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2291 {
2292     Z_InitResponse *initrs;
2293
2294     c->mask = 0;
2295     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2296     switch(apdu->which)
2297     {
2298     case Z_APDU_initResponse:
2299         initrs = apdu->u.initResponse;
2300         ZOOM_connection_option_set(c, "targetImplementationId",
2301                                    initrs->implementationId ?
2302                                    initrs->implementationId : "");
2303         ZOOM_connection_option_set(c, "targetImplementationName",
2304                                    initrs->implementationName ?
2305                                    initrs->implementationName : "");
2306         ZOOM_connection_option_set(c, "targetImplementationVersion",
2307                                    initrs->implementationVersion ?
2308                                    initrs->implementationVersion : "");
2309         if (!*initrs->result)
2310         {
2311             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2312         }
2313         else
2314         {
2315             char *cookie =
2316                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2317                                           VAL_COOKIE, 1, 0);
2318             xfree (c->cookie_in);
2319             c->cookie_in = 0;
2320             if (cookie)
2321                 c->cookie_in = xstrdup(cookie);
2322             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2323                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2324                 c->support_named_resultsets = 1;
2325             if (c->tasks)
2326             {
2327                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2328                 ZOOM_connection_remove_task (c);
2329             }
2330             ZOOM_connection_exec_task (c);
2331         }
2332         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2333         {
2334             NMEM tmpmem = nmem_create();
2335             Z_CharSetandLanguageNegotiation *p =
2336                 yaz_get_charneg_record(initrs->otherInfo);
2337
2338             if (p)
2339             {
2340                 char *charset=NULL, *lang=NULL;
2341                 int sel;
2342
2343                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2344                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2345                         "language %s, select %d",
2346                         charset ? charset : "none", lang ? lang : "none", sel);
2347                 if (charset)
2348                     ZOOM_connection_option_set (c, "negotiation-charset",
2349                                                 charset);
2350                 if (lang)
2351                     ZOOM_connection_option_set (c, "negotiation-lang",
2352                                                 lang);
2353                 nmem_destroy(tmpmem);
2354             }
2355         }
2356         break;
2357     case Z_APDU_searchResponse:
2358         handle_search_response (c, apdu->u.searchResponse);
2359         if (send_sort_present (c) == zoom_complete)
2360             ZOOM_connection_remove_task (c);
2361         break;
2362     case Z_APDU_presentResponse:
2363         handle_present_response (c, apdu->u.presentResponse);
2364         if (send_present (c) == zoom_complete)
2365             ZOOM_connection_remove_task (c);
2366         break;
2367     case Z_APDU_sortResponse:
2368         sort_response (c, apdu->u.sortResponse);
2369         if (send_present (c) == zoom_complete)
2370             ZOOM_connection_remove_task (c);
2371         break;
2372     case Z_APDU_scanResponse:
2373         scan_response (c, apdu->u.scanResponse);
2374         ZOOM_connection_remove_task (c);
2375         break;
2376     case Z_APDU_extendedServicesResponse:
2377         es_response (c, apdu->u.extendedServicesResponse);
2378         ZOOM_connection_remove_task (c);
2379         break;
2380     case Z_APDU_close:
2381         if (c->reconnect_ok)
2382         {
2383             do_close(c);
2384             c->tasks->running = 0;
2385             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2386         }
2387         else
2388         {
2389             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2390             do_close(c);
2391         }
2392         break;
2393     default:
2394         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2395         do_close(c);
2396     }
2397 }
2398
2399 #if HAVE_XML2
2400 static void handle_srw_response(ZOOM_connection c,
2401                                 Z_SRW_searchRetrieveResponse *res)
2402 {
2403     ZOOM_resultset resultset = 0;
2404     int i;
2405     NMEM nmem;
2406
2407     if (!c->tasks)
2408         return;
2409
2410     if (c->tasks->which == ZOOM_TASK_SEARCH)
2411         resultset = c->tasks->u.search.resultset;
2412     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2413         resultset = c->tasks->u.retrieve.resultset;
2414     else
2415         return ;
2416
2417     resultset->size = 0;
2418
2419     yaz_log(LOG_DEBUG, "got SRW response OK");
2420
2421     if (res->numberOfRecords)
2422         resultset->size = *res->numberOfRecords;
2423
2424     for (i = 0; i<res->num_records; i++)
2425     {
2426         int pos;
2427
2428         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2429             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2430
2431         if (res->records[i].recordPosition &&
2432             *res->records[i].recordPosition > 0)
2433             pos = *res->records[i].recordPosition - 1;
2434         else
2435             pos = resultset->start + i;
2436
2437         npr->databaseName = 0;
2438         npr->which = Z_NamePlusRecord_databaseRecord;
2439         npr->u.databaseRecord = (Z_External *)
2440             odr_malloc(c->odr_in, sizeof(Z_External));
2441         npr->u.databaseRecord->descriptor = 0;
2442         npr->u.databaseRecord->direct_reference =
2443             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2444         npr->u.databaseRecord->which = Z_External_octet;
2445         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2446             odr_malloc(c->odr_in, sizeof(Odr_oct));
2447         npr->u.databaseRecord->u.octet_aligned->buf =
2448             res->records[i].recordData_buf;
2449         npr->u.databaseRecord->u.octet_aligned->len =
2450             npr->u.databaseRecord->u.octet_aligned->size =
2451             res->records[i].recordData_len;
2452         record_cache_add (resultset, npr, pos);
2453     }
2454     if (res->num_diagnostics > 0)
2455     {
2456         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2457                        res->diagnostics[0].details, 0);
2458     }
2459     nmem = odr_extract_mem(c->odr_in);
2460     nmem_transfer(resultset->odr->mem, nmem);
2461     nmem_destroy(nmem);
2462 }
2463 #endif
2464
2465 #if HAVE_XML2
2466 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2467 {
2468     int ret = -1;
2469     const char *content_type = z_HTTP_header_lookup(hres->headers,
2470                                                     "Content-Type");
2471     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2472                                                        "Connection");
2473     c->mask = 0;
2474     yaz_log (LOG_DEBUG, "handle_http");
2475
2476     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2477     {
2478         Z_SOAP *soap_package = 0;
2479         ODR o = odr_createmem(ODR_DECODE);
2480         Z_SOAP_Handler soap_handlers[2] = {
2481             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2482              (Z_SOAP_fun) yaz_srw_codec},
2483             {0, 0, 0}
2484         };
2485         ret = z_soap_codec(o, &soap_package,
2486                            &hres->content_buf, &hres->content_len,
2487                            soap_handlers);
2488         if (!ret && soap_package->which == Z_SOAP_generic &&
2489             soap_package->u.generic->no == 0)
2490         {
2491             Z_SRW_searchRetrieve *sr = soap_package->u.generic->p;
2492             if (sr->which == Z_SRW_searchRetrieve_response)
2493                 handle_srw_response(c, sr->u.response);
2494             else
2495                 ret = -1;
2496         }
2497         else if (!ret && (soap_package->which == Z_SOAP_fault
2498                           || soap_package->which == Z_SOAP_error))
2499         {
2500             set_HTTP_error(c, hres->code,
2501                            soap_package->u.fault->fault_code,
2502                            soap_package->u.fault->fault_string);
2503         }
2504         else
2505             ret = -1;
2506         odr_destroy(o);
2507     }
2508     if (ret)
2509     {
2510         if (hres->code != 200)
2511             set_HTTP_error(c, hres->code, 0, 0);
2512         else
2513             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2514         do_close (c);
2515     }
2516     ZOOM_connection_remove_task(c);
2517     if (!strcmp(hres->version, "1.0"))
2518     {
2519         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2520         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2521             do_close(c);
2522     }
2523     else
2524     {
2525         /* HTTP 1.1: only if no close we stay alive .. */
2526         if (connection_head && !strcmp(connection_head, "close"))
2527             do_close(c);
2528     }
2529 }
2530 #endif
2531
2532 static int do_read (ZOOM_connection c)
2533 {
2534     int r;
2535     ZOOM_Event event;
2536
2537     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2538     ZOOM_connection_put_event (c, event);
2539
2540     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2541
2542     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2543     if (r == 1)
2544         return 0;
2545     if (r <= 0)
2546     {
2547         if (c->reconnect_ok)
2548         {
2549             do_close (c);
2550             c->reconnect_ok = 0;
2551             yaz_log (LOG_DEBUG, "reconnect read");
2552             c->tasks->running = 0;
2553             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2554         }
2555         else
2556         {
2557             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2558             do_close (c);
2559         }
2560     }
2561     else
2562     {
2563         Z_GDU *gdu;
2564         ZOOM_Event event;
2565         odr_reset (c->odr_in);
2566         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2567         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2568         ZOOM_connection_put_event (c, event);
2569
2570         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2571         {
2572             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2573             do_close (c);
2574         }
2575         else if (gdu->which == Z_GDU_Z3950)
2576             handle_apdu (c, gdu->u.z3950);
2577         else if (gdu->which == Z_GDU_HTTP_Response)
2578         {
2579 #if HAVE_XML2
2580             handle_http (c, gdu->u.HTTP_Response);
2581 #else
2582             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2583             do_close (c);
2584 #endif
2585         }
2586         c->reconnect_ok = 0;
2587     }
2588     return 1;
2589 }
2590
2591 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2592 {
2593     int r;
2594     ZOOM_Event event;
2595
2596     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2597     ZOOM_connection_put_event (c, event);
2598
2599     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2600     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2601     {
2602         if (c->reconnect_ok)
2603         {
2604             do_close (c);
2605             c->reconnect_ok = 0;
2606             yaz_log (LOG_DEBUG, "reconnect write");
2607             c->tasks->running = 0;
2608             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2609             return zoom_pending;
2610         }
2611         if (c->state == STATE_CONNECTING)
2612             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2613         else
2614             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2615         do_close (c);
2616         return zoom_complete;
2617     }
2618     else if (r == 1)
2619     {
2620         c->mask = ZOOM_SELECT_EXCEPT;
2621         if (c->cs->io_pending & CS_WANT_WRITE)
2622             c->mask += ZOOM_SELECT_WRITE;
2623         if (c->cs->io_pending & CS_WANT_READ)
2624             c->mask += ZOOM_SELECT_READ;
2625         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2626     }
2627     else
2628     {
2629         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2630         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2631     }
2632     return zoom_pending;
2633 }
2634
2635 static zoom_ret do_write(ZOOM_connection c)
2636 {
2637     return do_write_ex (c, c->buf_out, c->len_out);
2638 }
2639
2640
2641 ZOOM_API(const char *)
2642 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2643 {
2644     return ZOOM_options_get (c->options, key);
2645 }
2646
2647 ZOOM_API(void)
2648 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2649                                   const char *val)
2650 {
2651     ZOOM_options_set (c->options, key, val);
2652 }
2653
2654 ZOOM_API(const char *)
2655 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2656 {
2657     return ZOOM_options_get (r->options, key);
2658 }
2659
2660 ZOOM_API(void)
2661 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2662                                   const char *val)
2663 {
2664     ZOOM_options_set (r->options, key, val);
2665 }
2666
2667
2668 ZOOM_API(int)
2669 ZOOM_connection_errcode (ZOOM_connection c)
2670 {
2671     return ZOOM_connection_error (c, 0, 0);
2672 }
2673
2674 ZOOM_API(const char *)
2675 ZOOM_connection_errmsg (ZOOM_connection c)
2676 {
2677     const char *msg;
2678     ZOOM_connection_error (c, &msg, 0);
2679     return msg;
2680 }
2681
2682 ZOOM_API(const char *)
2683 ZOOM_connection_addinfo (ZOOM_connection c)
2684 {
2685     const char *addinfo;
2686     ZOOM_connection_error (c, 0, &addinfo);
2687     return addinfo;
2688 }
2689
2690 ZOOM_API(const char *)
2691 ZOOM_diag_str (int error)
2692 {
2693     switch (error)
2694     {
2695     case ZOOM_ERROR_NONE:
2696         return "No error";
2697     case ZOOM_ERROR_CONNECT:
2698         return "Connect failed";
2699     case ZOOM_ERROR_MEMORY:
2700         return "Out of memory";
2701     case ZOOM_ERROR_ENCODE:
2702         return "Encoding failed";
2703     case ZOOM_ERROR_DECODE:
2704         return "Decoding failed";
2705     case ZOOM_ERROR_CONNECTION_LOST:
2706         return "Connection lost";
2707     case ZOOM_ERROR_INIT:
2708         return "Init rejected";
2709     case ZOOM_ERROR_INTERNAL:
2710         return "Internal failure";
2711     case ZOOM_ERROR_TIMEOUT:
2712         return "Timeout";
2713     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2714         return "Unsupported protocol";
2715     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2716         return "Unsupported query type";
2717     default:
2718         return diagbib1_str (error);
2719     }
2720 }
2721
2722 ZOOM_API(int)
2723 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2724                          const char **addinfo, const char **diagset)
2725 {
2726     int error = c->error;
2727     if (cp)
2728     {
2729         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2730             *cp = ZOOM_diag_str(error);
2731         else if (!strcmp(c->diagset, "HTTP"))
2732             *cp = z_HTTP_errmsg(c->error);
2733         else if (!strcmp(c->diagset, "Bib-1"))
2734             *cp = ZOOM_diag_str(error);
2735         else if (!strcmp(c->diagset, "SRW"))
2736             *cp = yaz_diag_srw_str(c->error);
2737         else
2738             *cp = "Unknown error and diagnostic set";
2739     }
2740     if (addinfo)
2741         *addinfo = c->addinfo ? c->addinfo : "";
2742     if (diagset)
2743         *diagset = c->diagset ? c->diagset : "";
2744     return c->error;
2745 }
2746
2747 ZOOM_API(int)
2748 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2749                        const char **addinfo)
2750 {
2751     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2752 }
2753
2754 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2755 {
2756     ZOOM_Event event = 0;
2757     int r = cs_look(c->cs);
2758     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2759              c, mask, r);
2760
2761     if (r == CS_NONE)
2762     {
2763         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2764         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2765         do_close (c);
2766         ZOOM_connection_put_event (c, event);
2767     }
2768     else if (r == CS_CONNECT)
2769     {
2770         int ret;
2771         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2772
2773         ret = cs_rcvconnect (c->cs);
2774         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2775         if (ret == 1)
2776         {
2777             c->mask = ZOOM_SELECT_EXCEPT;
2778             if (c->cs->io_pending & CS_WANT_WRITE)
2779                 c->mask += ZOOM_SELECT_WRITE;
2780             if (c->cs->io_pending & CS_WANT_READ)
2781                 c->mask += ZOOM_SELECT_READ;
2782             ZOOM_connection_put_event (c, event);
2783         }
2784         else if (ret == 0)
2785         {
2786             ZOOM_connection_put_event (c, event);
2787             if (c->proto == PROTO_Z3950)
2788                 ZOOM_connection_send_init(c);
2789             else
2790             {
2791                 /* no init request for SRW .. */
2792                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2793                 ZOOM_connection_remove_task (c);
2794                 c->mask = 0;
2795                 ZOOM_connection_exec_task (c);
2796             }
2797             c->state = STATE_ESTABLISHED;
2798         }
2799         else
2800         {
2801             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2802             do_close (c);
2803             ZOOM_connection_put_event (c, event);
2804         }
2805     }
2806     else
2807     {
2808         if (mask & ZOOM_SELECT_READ)
2809             do_read (c);
2810         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2811             do_write (c);
2812     }
2813     return 1;
2814 }
2815
2816 ZOOM_API(int)
2817 ZOOM_connection_last_event(ZOOM_connection cs)
2818 {
2819     if (!cs)
2820         return ZOOM_EVENT_NONE;
2821     return cs->last_event;
2822 }
2823
2824 ZOOM_API(int)
2825 ZOOM_event (int no, ZOOM_connection *cs)
2826 {
2827     int timeout = 5000;
2828 #if HAVE_SYS_POLL_H
2829     struct pollfd pollfds[1024];
2830     ZOOM_connection poll_cs[1024];
2831 #else
2832     struct timeval tv;
2833     fd_set input, output, except;
2834 #endif
2835     int i, r, nfds;
2836     int max_fd = 0;
2837
2838     for (i = 0; i<no; i++)
2839     {
2840         ZOOM_connection c = cs[i];
2841         ZOOM_Event event;
2842         if (c && (event = ZOOM_connection_get_event(c)))
2843         {
2844             ZOOM_Event_destroy (event);
2845             return i+1;
2846         }
2847     }
2848     for (i = 0; i<no; i++)
2849     {
2850         ZOOM_connection c = cs[i];
2851         ZOOM_Event event;
2852         if (c && ZOOM_connection_exec_task (c))
2853         {
2854             if ((event = ZOOM_connection_get_event(c)))
2855             {
2856                 ZOOM_Event_destroy (event);
2857                 return i+1;
2858             }
2859         }
2860     }
2861 #if HAVE_SYS_POLL_H
2862
2863 #else
2864     FD_ZERO (&input);
2865     FD_ZERO (&output);
2866     FD_ZERO (&except);
2867 #endif
2868     nfds = 0;
2869     for (i = 0; i<no; i++)
2870     {
2871         ZOOM_connection c = cs[i];
2872         int fd, mask;
2873         int this_timeout;
2874
2875         if (!c)
2876             continue;
2877         fd = z3950_connection_socket(c);
2878         mask = z3950_connection_mask(c);
2879
2880         if (fd == -1)
2881             continue;
2882         if (max_fd < fd)
2883             max_fd = fd;
2884
2885         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2886         if (this_timeout != -1 && this_timeout < timeout)
2887             timeout = this_timeout;
2888 #if HAVE_SYS_POLL_H
2889         if (mask)
2890         {
2891             short poll_events = 0;
2892
2893             if (mask & ZOOM_SELECT_READ)
2894                 poll_events += POLLIN;
2895             if (mask & ZOOM_SELECT_WRITE)
2896                 poll_events += POLLOUT;
2897             if (mask & ZOOM_SELECT_EXCEPT)
2898                 poll_events += POLLERR;
2899             pollfds[nfds].fd = fd;
2900             pollfds[nfds].events = poll_events;
2901             pollfds[nfds].revents = 0;
2902             poll_cs[nfds] = c;
2903             nfds++;
2904         }
2905 #else
2906         if (mask & ZOOM_SELECT_READ)
2907         {
2908             FD_SET (fd, &input);
2909             nfds++;
2910         }
2911         if (mask & ZOOM_SELECT_WRITE)
2912         {
2913             FD_SET (fd, &output);
2914             nfds++;
2915         }
2916         if (mask & ZOOM_SELECT_EXCEPT)
2917         {
2918             FD_SET (fd, &except);
2919             nfds++;
2920         }
2921 #endif
2922     }
2923     if (timeout >= 5000)
2924         timeout = 30;
2925
2926     if (!nfds)
2927         return 0;
2928
2929 #if HAVE_SYS_POLL_H
2930     r = poll (pollfds, nfds, timeout * 1000);
2931     for (i = 0; i<nfds; i++)
2932     {
2933         ZOOM_connection c = poll_cs[i];
2934         if (r && c->mask)
2935         {
2936             int mask = 0;
2937             if (pollfds[i].revents & POLLIN)
2938                 mask += ZOOM_SELECT_READ;
2939             if (pollfds[i].revents & POLLOUT)
2940                 mask += ZOOM_SELECT_WRITE;
2941             if (pollfds[i].revents & POLLERR)
2942                 mask += ZOOM_SELECT_EXCEPT;
2943             if (mask)
2944                 ZOOM_connection_do_io(c, mask);
2945         }
2946         else if (r == 0 && c->mask)
2947         {
2948             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2949             /* timeout and this connection was waiting */
2950             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2951             do_close (c);
2952             ZOOM_connection_put_event(c, event);
2953         }
2954     }
2955 #else
2956     tv.tv_sec = timeout;
2957     tv.tv_usec = 0;
2958     yaz_log (LOG_DEBUG, "select start");
2959     r = select (max_fd+1, &input, &output, &except, &tv);
2960     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2961     for (i = 0; i<no; i++)
2962     {
2963         ZOOM_connection c = cs[i];
2964         int fd, mask;
2965
2966         if (!c)
2967             continue;
2968         fd = z3950_connection_socket(c);
2969         mask = 0;
2970         if (r && c->mask)
2971         {
2972             /* no timeout and real socket */
2973             if (FD_ISSET(fd, &input))
2974                 mask += ZOOM_SELECT_READ;
2975             if (FD_ISSET(fd, &output))
2976                 mask += ZOOM_SELECT_WRITE;
2977             if (FD_ISSET(fd, &except))
2978                 mask += ZOOM_SELECT_EXCEPT;
2979             if (mask)
2980                 ZOOM_connection_do_io(c, mask);
2981         }
2982         if (r == 0 && c->mask)
2983         {
2984             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2985             /* timeout and this connection was waiting */
2986             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2987             do_close (c);
2988             yaz_log (LOG_DEBUG, "timeout");
2989             ZOOM_connection_put_event(c, event);
2990         }
2991     }
2992 #endif
2993     for (i = 0; i<no; i++)
2994     {
2995         ZOOM_connection c = cs[i];
2996         ZOOM_Event event;
2997         if (c && (event = ZOOM_connection_get_event(c)))
2998         {
2999             ZOOM_Event_destroy (event);
3000             return i+1;
3001         }
3002     }
3003     return 0;
3004 }