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 1.20 2003-02-17 14:35:42 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_LOG, "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     return 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     return 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     xfree (c->path);
 351     if (portnum)
 352     {
 353         char hostn[128];
 354         sprintf (hostn, "%.80s:%d", host, portnum);
 355         c->host_port = xstrdup(hostn);
 356     }
 357     else
 358         c->host_port = xstrdup(host);
 359
 360     ZOOM_options_set(c->options, "host", c->host_port);
 361
 362     val = ZOOM_options_get (c->options, "cookie");
 363     if (val && *val)
 364         c->cookie_out = xstrdup (val);
 365
 366     val = ZOOM_options_get (c->options, "clientIP");
 367     if (val && *val)
 368         c->client_IP = xstrdup (val);
 369
 370     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 371
 372     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 373
 374     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 375
 376     if (!c->async)
 377     {
 378         while (ZOOM_event (1, &c))
 379             ;
 380     }
 381 }
 382
 383 ZOOM_API(ZOOM_query)
 384 ZOOM_query_create(void)
 385 {
 386     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 387
 388     s->refcount = 1;
 389     s->z_query = 0;
 390     s->sort_spec = 0;
 391     s->odr = odr_createmem (ODR_ENCODE);
 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->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 415     s->z_query->which = Z_Query_type_1;
 416     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 417     if (!s->z_query->u.type_1)
 418         return -1;
 419     return 0;
 420 }
 421
 422 ZOOM_API(int)
 423 ZOOM_query_cql(ZOOM_query s, const char *str)
 424 {
 425     Z_External *ext;
 426
 427     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 428     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 429     ext->indirect_reference = 0;
 430     ext->descriptor = 0;
 431     ext->which = Z_External_CQL;
 432     ext->u.cql = odr_strdup(s->odr, str);
 433
 434     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 435     s->z_query->which = Z_Query_type_104;
 436     s->z_query->u.type_104 =  ext;
 437     return 0;
 438 }
 439
 440 ZOOM_API(int)
 441 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 442 {
 443     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 444     if (!s->sort_spec)
 445         return -1;
 446     return 0;
 447 }
 448
 449 static zoom_ret do_write(ZOOM_connection c);
 450
 451 ZOOM_API(void)
 452 ZOOM_connection_destroy(ZOOM_connection c)
 453 {
 454     ZOOM_resultset r;
 455     if (!c)
 456         return;
 457     if (c->cs)
 458         cs_close (c->cs);
 459     for (r = c->resultsets; r; r = r->next)
 460         r->connection = 0;
 461
 462     xfree (c->buf_in);
 463     xfree (c->addinfo);
 464     odr_destroy (c->odr_in);
 465     odr_destroy (c->odr_out);
 466     ZOOM_options_destroy (c->options);
 467     ZOOM_connection_remove_tasks (c);
 468     xfree (c->host_port);
 469     xfree (c->proxy);
 470     xfree (c->charset);
 471     xfree (c->lang);
 472     xfree (c->cookie_out);
 473     xfree (c->cookie_in);
 474     xfree (c->client_IP);
 475     xfree (c);
 476 }
 477
 478 void ZOOM_resultset_addref (ZOOM_resultset r)
 479 {
 480     if (r)
 481     {
 482         (r->refcount)++;
 483         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 484                  r, r->refcount);
 485     }
 486 }
 487 ZOOM_resultset ZOOM_resultset_create ()
 488 {
 489     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 490
 491     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 492     r->refcount = 1;
 493     r->size = 0;
 494     r->odr = odr_createmem (ODR_ENCODE);
 495     r->start = 0;
 496     r->piggyback = 1;
 497     r->setname = 0;
 498     r->schema = 0;
 499     r->count = 0;
 500     r->record_cache = 0;
 501     r->r_sort_spec = 0;
 502     r->z_query = 0;
 503     r->search = 0;
 504     r->connection = 0;
 505     r->next = 0;
 506     return r;
 507 }
 508
 509 ZOOM_API(ZOOM_resultset)
 510 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 511 {
 512     ZOOM_resultset r;
 513     ZOOM_query s = ZOOM_query_create();
 514
 515     ZOOM_query_prefix (s, q);
 516
 517     r = ZOOM_connection_search (c, s);
 518     ZOOM_query_destroy (s);
 519     return r;
 520 }
 521
 522 ZOOM_API(ZOOM_resultset)
 523 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 524 {
 525     ZOOM_resultset r = ZOOM_resultset_create ();
 526     ZOOM_task task;
 527     const char *cp;
 528
 529     r->r_sort_spec = q->sort_spec;
 530     r->z_query = q->z_query;
 531     r->search = q;
 532
 533     r->options = ZOOM_options_create_with_parent(c->options);
 534
 535     r->start = ZOOM_options_get_int(r->options, "start", 0);
 536     r->count = ZOOM_options_get_int(r->options, "count", 0);
 537     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 538     cp = ZOOM_options_get (r->options, "setname");
 539     if (cp)
 540         r->setname = xstrdup(cp);
 541     cp = ZOOM_options_get (r->options, "schema");
 542     if (cp)
 543         r->schema = xstrdup(cp);
 544
 545     r->connection = c;
 546
 547     r->next = c->resultsets;
 548     c->resultsets = r;
 549
 550     if (c->host_port && c->proto == PROTO_SRW)
 551     {
 552         if (!c->cs)
 553         {
 554             yaz_log(LOG_DEBUG, "NO COMSTACK");
 555             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 556         }
 557         else
 558         {
 559             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 560             c->reconnect_ok = 1;
 561         }
 562     }
 563
 564     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 565     task->u.search.resultset = r;
 566     ZOOM_resultset_addref (r);
 567
 568     (q->refcount)++;
 569
 570     if (!c->async)
 571     {
 572         while (ZOOM_event (1, &c))
 573             ;
 574     }
 575     return r;
 576 }
 577
 578 ZOOM_API(void)
 579 ZOOM_resultset_destroy(ZOOM_resultset r)
 580 {
 581     if (!r)
 582         return;
 583     (r->refcount)--;
 584     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 585              r, r->refcount);
 586     if (r->refcount == 0)
 587     {
 588         ZOOM_record_cache rc;
 589
 590         for (rc = r->record_cache; rc; rc = rc->next)
 591             if (rc->rec.wrbuf_marc)
 592                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 593         if (r->connection)
 594         {
 595             /* remove ourselves from the resultsets in connection */
 596             ZOOM_resultset *rp = &r->connection->resultsets;
 597             while (1)
 598             {
 599                 assert (*rp);   /* we must be in this list!! */
 600                 if (*rp == r)
 601                 {   /* OK, we're here - take us out of it */
 602                     *rp = (*rp)->next;
 603                     break;
 604                 }
 605                 rp = &(*rp)->next;
 606             }
 607         }
 608         ZOOM_query_destroy (r->search);
 609         ZOOM_options_destroy (r->options);
 610         odr_destroy (r->odr);
 611         xfree (r->setname);
 612         xfree (r->schema);
 613         xfree (r);
 614     }
 615 }
 616
 617 ZOOM_API(size_t)
 618 ZOOM_resultset_size (ZOOM_resultset r)
 619 {
 620     return r->size;
 621 }
 622
 623 static void do_close (ZOOM_connection c)
 624 {
 625     if (c->cs)
 626         cs_close(c->cs);
 627     c->cs = 0;
 628     c->mask = 0;
 629     c->state = STATE_IDLE;
 630 }
 631
 632 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 633                                      int force_sync, int start, int count)
 634 {
 635     ZOOM_task task;
 636     ZOOM_connection c;
 637     const char *cp;
 638
 639     if (!r)
 640         return;
 641     c = r->connection;
 642     if (!c)
 643         return;
 644     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 645     task->u.retrieve.resultset = r;
 646     task->u.retrieve.start = start;
 647     task->u.retrieve.count = count;
 648
 649     cp = ZOOM_options_get (r->options, "schema");
 650     if (cp)
 651     {
 652         if (!r->schema || strcmp(r->schema, cp))
 653         {
 654             xfree(r->schema);
 655             r->schema = xstrdup(cp);
 656         }
 657     }
 658
 659     ZOOM_resultset_addref (r);
 660
 661     if (!r->connection->async || force_sync)
 662         while (r->connection && ZOOM_event (1, &r->connection))
 663             ;
 664 }
 665
 666 ZOOM_API(void)
 667 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 668                         size_t start, size_t count)
 669 {
 670     int force_present = 0;
 671
 672     if (!r)
 673         return ;
 674     if (count && recs)
 675         force_present = 1;
 676     ZOOM_resultset_retrieve (r, force_present, start, count);
 677     if (force_present)
 678     {
 679         size_t i;
 680         for (i = 0; i< count; i++)
 681             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 682     }
 683 }
 684
 685 static zoom_ret do_connect (ZOOM_connection c)
 686 {
 687     void *add;
 688     const char *effective_host;
 689
 690     if (c->proxy)
 691         effective_host = c->proxy;
 692     else
 693         effective_host = c->host_port;
 694
 695     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 696
 697     assert (!c->cs);
 698
 699     if (memcmp(c->host_port, "http:", 5) == 0)
 700     {
 701 #if HAVE_XSLT
 702         const char *path;
 703         c->proto = PROTO_SRW;
 704         effective_host = c->host_port + 5;
 705         if (*effective_host == '/')
 706             effective_host++;
 707         if (*effective_host == '/')
 708             effective_host++;
 709         if (!(path = strchr(effective_host, '/')))
 710             path = "/";
 711         xfree(c->path);
 712         c->path = xstrdup(path);
 713 #else
 714         c->state = STATE_IDLE;
 715         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 716         return zoom_complete;
 717 #endif
 718     }
 719     c->cs = cs_create_host (effective_host, 0, &add);
 720
 721     if (c->cs)
 722     {
 723         int ret = cs_connect (c->cs, add);
 724         if (ret == 0)
 725         {
 726             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 727             ZOOM_connection_put_event(c, event);
 728             if (c->proto == PROTO_Z3950)
 729                 ZOOM_connection_send_init(c);
 730             else
 731             {
 732                 /* no init request for SRW .. */
 733                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 734                 ZOOM_connection_remove_task (c);
 735                 c->mask = 0;
 736                 ZOOM_connection_exec_task (c);
 737             }
 738             c->state = STATE_ESTABLISHED;
 739             return zoom_pending;
 740         }
 741         else if (ret > 0)
 742         {
 743             c->state = STATE_CONNECTING;
 744             c->mask = ZOOM_SELECT_EXCEPT;
 745             if (c->cs->io_pending & CS_WANT_WRITE)
 746                 c->mask += ZOOM_SELECT_WRITE;
 747             if (c->cs->io_pending & CS_WANT_READ)
 748                 c->mask += ZOOM_SELECT_READ;
 749             return zoom_pending;
 750         }
 751     }
 752     c->state = STATE_IDLE;
 753     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 754     return zoom_complete;
 755 }
 756
 757 int z3950_connection_socket(ZOOM_connection c)
 758 {
 759     if (c->cs)
 760         return cs_fileno(c->cs);
 761     return -1;
 762 }
 763
 764 int z3950_connection_mask(ZOOM_connection c)
 765 {
 766     if (c->cs)
 767         return c->mask;
 768     return 0;
 769 }
 770
 771 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 772 {
 773     int i;
 774     for (i = 0; i<200; i++)
 775     {
 776         size_t len;
 777         Z_OtherInformation **oi;
 778         char buf[80];
 779         const char *val;
 780         const char *cp;
 781         int oidval;
 782
 783         sprintf (buf, "otherInfo%d", i);
 784         val = ZOOM_options_get (c->options, buf);
 785         if (!val)
 786             break;
 787         cp = strchr (val, ':');
 788         if (!cp)
 789             continue;
 790         len = cp - val;
 791         if (len >= sizeof(buf))
 792             len = sizeof(buf)-1;
 793         memcpy (buf, val, len);
 794         buf[len] = '\0';
 795         oidval = oid_getvalbyname (buf);
 796         if (oidval == VAL_NONE)
 797             continue;
 798
 799         yaz_oi_APDU(a, &oi);
 800         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 801     }
 802 }
 803
 804 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 805 {
 806     assert (a);
 807     if (c->cookie_out)
 808     {
 809         Z_OtherInformation **oi;
 810         yaz_oi_APDU(a, &oi);
 811         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 812     }
 813     if (c->client_IP)
 814     {
 815         Z_OtherInformation **oi;
 816         yaz_oi_APDU(a, &oi);
 817         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 818     }
 819     otherInfo_attach (c, a, out);
 820     if (!z_APDU(out, &a, 0, 0))
 821     {
 822         FILE *outf = fopen("/tmp/apdu.txt", "a");
 823         if (a && outf)
 824         {
 825             ODR odr_pr = odr_createmem(ODR_PRINT);
 826             fprintf (outf, "a=%p\n", a);
 827             odr_setprint(odr_pr, outf);
 828             z_APDU(odr_pr, &a, 0, 0);
 829             odr_destroy(odr_pr);
 830         }
 831         yaz_log (LOG_DEBUG, "encoding failed");
 832         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 833         odr_reset(out);
 834         return -1;
 835     }
 836
 837     return 0;
 838 }
 839
 840 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 841 {
 842     ZOOM_Event event;
 843     yaz_log(LOG_LOG, "sending Z39.50 APDU");
 844     assert (a);
 845     if (encode_APDU(c, a, c->odr_out))
 846         return zoom_complete;
 847     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 848     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 849     ZOOM_connection_put_event (c, event);
 850     odr_reset(c->odr_out);
 851     return do_write (c);
 852 }
 853
 854 /* returns 1 if PDU was sent OK (still pending )
 855            0 if PDU was not sent OK (nothing to wait for)
 856 */
 857
 858 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 859 {
 860     const char *impname;
 861     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 862     Z_InitRequest *ireq = apdu->u.initRequest;
 863     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 864         odr_malloc(c->odr_out, sizeof(*auth));
 865     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 866     const char *auth_userId = ZOOM_options_get (c->options, "user");
 867     const char *auth_password = ZOOM_options_get (c->options, "pass");
 868
 869     ODR_MASK_SET(ireq->options, Z_Options_search);
 870     ODR_MASK_SET(ireq->options, Z_Options_present);
 871     ODR_MASK_SET(ireq->options, Z_Options_scan);
 872     ODR_MASK_SET(ireq->options, Z_Options_sort);
 873     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 874     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 875
 876     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 877     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 878     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 879
 880     impname = ZOOM_options_get (c->options, "implementationName");
 881     ireq->implementationName =
 882         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 883     strcpy (ireq->implementationName, "");
 884     if (impname)
 885     {
 886         strcat (ireq->implementationName, impname);
 887         strcat (ireq->implementationName, "/");
 888     }
 889     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 890
 891     *ireq->maximumRecordSize =
 892         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 893     *ireq->preferredMessageSize =
 894         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 895
 896     if (auth_groupId || auth_password)
 897     {
 898         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 899         int i = 0;
 900         pass->groupId = 0;
 901         if (auth_groupId && *auth_groupId)
 902         {
 903             pass->groupId = (char *)
 904                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 905             strcpy(pass->groupId, auth_groupId);
 906             i++;
 907         }
 908         pass->userId = 0;
 909         if (auth_userId && *auth_userId)
 910         {
 911             pass->userId = (char *)
 912                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 913             strcpy(pass->userId, auth_userId);
 914             i++;
 915         }
 916         pass->password = 0;
 917         if (auth_password && *auth_password)
 918         {
 919             pass->password = (char *)
 920                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 921             strcpy(pass->password, auth_password);
 922             i++;
 923         }
 924         if (i)
 925         {
 926             auth->which = Z_IdAuthentication_idPass;
 927             auth->u.idPass = pass;
 928             ireq->idAuthentication = auth;
 929         }
 930     }
 931     else if (auth_userId)
 932     {
 933         auth->which = Z_IdAuthentication_open;
 934         auth->u.open = (char *)
 935             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 936         strcpy(auth->u.open, auth_userId);
 937         ireq->idAuthentication = auth;
 938     }
 939     if (c->proxy)
 940         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 941                                  VAL_PROXY, 1, c->host_port);
 942     if (c->charset||c->lang)
 943     {
 944         Z_OtherInformation **oi;
 945         Z_OtherInformationUnit *oi_unit;
 946
 947         yaz_oi_APDU(apdu, &oi);
 948
 949         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 950         {
 951             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 952
 953             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 954             oi_unit->information.externallyDefinedInfo =
 955                 yaz_set_proposal_charneg
 956                 (c->odr_out,
 957                  (const char **)&c->charset, (c->charset) ? 1:0,
 958                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 959         }
 960     }
 961     assert (apdu);
 962     return send_APDU (c, apdu);
 963 }
 964
 965 #if HAVE_XSLT
 966 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_searchRetrieve *sr)
 967 {
 968     Z_SOAP_Handler h[2] = {
 969         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 970         {0, 0, 0}
 971     };
 972     ODR o = odr_createmem(ODR_ENCODE);
 973     int ret;
 974     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 975     Z_GDU *gdu;
 976     ZOOM_Event event;
 977
 978     gdu = z_get_HTTP_Request(c->odr_out);
 979     gdu->u.HTTP_Request->path = c->path;
 980     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 981                       "Content-Type", "text/xml");
 982     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 983                       "SOAPAction", "\"\"");
 984     p->which = Z_SOAP_generic;
 985     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
 986     p->u.generic->no = 0;
 987     p->u.generic->ns = 0;
 988     p->u.generic->p = sr;
 989     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
 990
 991     ret = z_soap_codec(o, &p,
 992                        &gdu->u.HTTP_Request->content_buf,
 993                        &gdu->u.HTTP_Request->content_len, h);
 994
 995     if (!z_GDU(c->odr_out, &gdu, 0, 0))
 996         return zoom_complete;
 997     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 998
 999     odr_destroy(o);
1000
1001     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1002     ZOOM_connection_put_event (c, event);
1003     odr_reset(c->odr_out);
1004     return do_write (c);
1005 }
1006 #endif
1007
1008 #if HAVE_XSLT
1009 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1010 {
1011     int i;
1012     ZOOM_resultset resultset = 0;
1013     Z_SRW_searchRetrieve *sr = 0;
1014
1015     if (c->error)                  /* don't continue on error */
1016         return zoom_complete;
1017     assert (c->tasks);
1018     if (c->tasks->which == ZOOM_TASK_SEARCH)
1019         resultset = c->tasks->u.search.resultset;
1020     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1021     {
1022         resultset = c->tasks->u.retrieve.resultset;
1023
1024         resultset->start = c->tasks->u.retrieve.start;
1025         resultset->count = c->tasks->u.retrieve.count;
1026
1027         if (resultset->start >= resultset->size)
1028             return zoom_complete;
1029         if (resultset->start + resultset->count > resultset->size)
1030             resultset->count = resultset->size - resultset->start;
1031
1032         for (i = 0; i<resultset->count; i++)
1033         {
1034             ZOOM_record rec =
1035                 record_cache_lookup (resultset, i + resultset->start);
1036             if (!rec)
1037                 break;
1038         }
1039         if (i == resultset->count)
1040             return zoom_complete;
1041     }
1042     assert(resultset->z_query);
1043
1044     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1045
1046     if (resultset->z_query->which == Z_Query_type_104
1047         && resultset->z_query->u.type_104->which == Z_External_CQL)
1048         sr->u.request->query = resultset->z_query->u.type_104->u.cql;
1049     else if (resultset->z_query->which == Z_Query_type_1)
1050     {
1051         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, "Type-1");
1052         return zoom_complete;
1053     }
1054     else
1055     {
1056         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1057         return zoom_complete;
1058     }
1059     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1060     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1061     sr->u.request->recordSchema = resultset->schema;
1062
1063     resultset->setname = xstrdup ("default");
1064     ZOOM_options_set (resultset->options, "setname", resultset->setname);
1065
1066     return send_srw(c, sr);
1067 }
1068 #else
1069 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1070 {
1071     return zoom_complete;
1072 }
1073 #endif
1074
1075 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1076 {
1077     ZOOM_resultset r;
1078     int lslb, ssub, mspn;
1079     const char *syntax;
1080     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1081     Z_SearchRequest *search_req = apdu->u.searchRequest;
1082     const char *elementSetName;
1083     const char *smallSetElementSetName;
1084     const char *mediumSetElementSetName;
1085
1086     assert (c->tasks);
1087     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1088
1089     r = c->tasks->u.search.resultset;
1090
1091     elementSetName =
1092         ZOOM_options_get (r->options, "elementSetName");
1093     smallSetElementSetName  =
1094         ZOOM_options_get (r->options, "smallSetElementSetName");
1095     mediumSetElementSetName =
1096         ZOOM_options_get (r->options, "mediumSetElementSetName");
1097
1098     if (!smallSetElementSetName)
1099         smallSetElementSetName = elementSetName;
1100
1101     if (!mediumSetElementSetName)
1102         mediumSetElementSetName = elementSetName;
1103
1104     assert (r);
1105     assert (r->z_query);
1106
1107     /* prepare query for the search request */
1108     search_req->query = r->z_query;
1109
1110     search_req->databaseNames =
1111         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1112
1113     /* get syntax (no need to provide unless piggyback is in effect) */
1114     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1115
1116     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1117     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1118     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1119     if (lslb != -1 && ssub != -1 && mspn != -1)
1120     {
1121         /* So're a Z39.50 expert? Let's hope you don't do sort */
1122         *search_req->largeSetLowerBound = lslb;
1123         *search_req->smallSetUpperBound = ssub;
1124         *search_req->mediumSetPresentNumber = mspn;
1125     }
1126     else if (r->start == 0 && r->count > 0
1127              && r->piggyback && !r->r_sort_spec && !r->schema)
1128     {
1129         /* Regular piggyback - do it unless we're going to do sort */
1130         *search_req->largeSetLowerBound = 2000000000;
1131         *search_req->smallSetUpperBound = 0;
1132         *search_req->mediumSetPresentNumber = r->count;
1133         smallSetElementSetName = 0;
1134     }
1135     else
1136     {
1137         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1138         smallSetElementSetName = 0;
1139         mediumSetElementSetName = 0;
1140         syntax = 0;
1141     }
1142     if (smallSetElementSetName && *smallSetElementSetName)
1143     {
1144         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1145             odr_malloc (c->odr_out, sizeof(*esn));
1146
1147         esn->which = Z_ElementSetNames_generic;
1148         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1149         search_req->smallSetElementSetNames = esn;
1150     }
1151     if (mediumSetElementSetName && *mediumSetElementSetName)
1152     {
1153         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1154             odr_malloc (c->odr_out, sizeof(*esn));
1155
1156         esn->which = Z_ElementSetNames_generic;
1157         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1158         search_req->mediumSetElementSetNames = esn;
1159     }
1160     if (syntax)
1161         search_req->preferredRecordSyntax =
1162             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1163
1164     if (!r->setname)
1165     {
1166         if (c->support_named_resultsets)
1167         {
1168             char setname[14];
1169             int ord;
1170             /* find the lowest unused ordinal so that we re-use
1171                result sets on the server. */
1172             for (ord = 1; ; ord++)
1173             {
1174                 ZOOM_resultset rp;
1175                 sprintf (setname, "%d", ord);
1176                 for (rp = c->resultsets; rp; rp = rp->next)
1177                     if (rp->setname && !strcmp (rp->setname, setname))
1178                         break;
1179                 if (!rp)
1180                     break;
1181             }
1182             r->setname = xstrdup (setname);
1183             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1184         }
1185         else
1186             r->setname = xstrdup ("default");
1187         ZOOM_options_set (r->options, "setname", r->setname);
1188     }
1189     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1190     /* send search request */
1191     return send_APDU (c, apdu);
1192 }
1193
1194 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1195 {
1196     int oclass;
1197     Z_DefaultDiagFormat *r;
1198     char *addinfo = 0;
1199
1200     xfree (c->addinfo);
1201     c->addinfo = 0;
1202     if (p->which != Z_DiagRec_defaultFormat)
1203     {
1204         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1205         return;
1206     }
1207     r = p->u.defaultFormat;
1208     switch (r->which)
1209     {
1210     case Z_DefaultDiagFormat_v2Addinfo:
1211         addinfo = r->u.v2Addinfo;
1212         break;
1213     case Z_DefaultDiagFormat_v3Addinfo:
1214         addinfo = r->u.v3Addinfo;
1215         break;
1216     }
1217     set_dset_error(c, *r->condition,
1218                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1219                    addinfo, 0);
1220 }
1221
1222 ZOOM_API(ZOOM_record)
1223 ZOOM_record_clone (ZOOM_record srec)
1224 {
1225     char *buf;
1226     int size;
1227     ODR odr_enc;
1228     ZOOM_record nrec;
1229
1230     odr_enc = odr_createmem(ODR_ENCODE);
1231     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1232         return 0;
1233     buf = odr_getbuf (odr_enc, &size, 0);
1234
1235     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1236     nrec->odr = odr_createmem(ODR_DECODE);
1237     nrec->wrbuf_marc = 0;
1238     odr_setbuf (nrec->odr, buf, size, 0);
1239     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1240
1241     odr_destroy (odr_enc);
1242     return nrec;
1243 }
1244
1245 ZOOM_API(ZOOM_record)
1246 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1247 {
1248     return record_cache_lookup (s, pos);
1249 }
1250
1251 ZOOM_API(ZOOM_record)
1252 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1253 {
1254     ZOOM_resultset_retrieve (r, 1, pos, 1);
1255     return ZOOM_resultset_record_immediate (r, pos);
1256 }
1257
1258 ZOOM_API(void)
1259 ZOOM_record_destroy (ZOOM_record rec)
1260 {
1261     if (!rec)
1262         return;
1263     if (rec->wrbuf_marc)
1264         wrbuf_free (rec->wrbuf_marc, 1);
1265     odr_destroy (rec->odr);
1266     xfree (rec);
1267 }
1268
1269 ZOOM_API(const char *)
1270 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1271 {
1272     Z_NamePlusRecord *npr;
1273
1274     if (len)
1275         *len = 0; /* default return */
1276
1277     if (!rec)
1278         return 0;
1279     npr = rec->npr;
1280     if (!npr)
1281         return 0;
1282     if (!strcmp (type, "database"))
1283     {
1284         if (len)
1285             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1286         return npr->databaseName;
1287     }
1288     else if (!strcmp (type, "syntax"))
1289     {
1290         const char *desc = 0;
1291         if (npr->which == Z_NamePlusRecord_databaseRecord)
1292         {
1293             Z_External *r = (Z_External *) npr->u.databaseRecord;
1294             oident *ent = oid_getentbyoid(r->direct_reference);
1295             if (ent)
1296                 desc = ent->desc;
1297         }
1298         if (!desc)
1299             desc = "none";
1300         if (len)
1301             *len = strlen(desc);
1302         return desc;
1303     }
1304     else if (!strcmp (type, "render") &&
1305              npr->which == Z_NamePlusRecord_databaseRecord)
1306     {
1307         Z_External *r = (Z_External *) npr->u.databaseRecord;
1308         oident *ent = oid_getentbyoid(r->direct_reference);
1309
1310         if (r->which == Z_External_sutrs)
1311         {
1312             if (len) *len = r->u.sutrs->len;
1313             return (const char *) r->u.sutrs->buf;
1314         }
1315         else if (r->which == Z_External_octet)
1316         {
1317             yaz_marc_t mt;
1318             switch (ent->value)
1319             {
1320             case VAL_SOIF:
1321             case VAL_HTML:
1322             case VAL_SUTRS:
1323                 break;
1324             case VAL_TEXT_XML:
1325             case VAL_APPLICATION_XML:
1326                 break;
1327             default:
1328                 if (!rec->wrbuf_marc)
1329                     rec->wrbuf_marc = wrbuf_alloc();
1330
1331                 mt = yaz_marc_create();
1332                 wrbuf_rewind (rec->wrbuf_marc);
1333                 if (yaz_marc_decode_wrbuf (
1334                         mt, (const char *) r->u.octet_aligned->buf,
1335                         r->u.octet_aligned->len,
1336                         rec->wrbuf_marc) > 0)
1337                 {
1338                     if (len)
1339                         *len = wrbuf_len(rec->wrbuf_marc);
1340                     yaz_marc_destroy(mt);
1341                     return wrbuf_buf(rec->wrbuf_marc);
1342                 }
1343                 yaz_marc_destroy(mt);
1344             }
1345             if (len)
1346                 *len = r->u.octet_aligned->len;
1347             return (const char *) r->u.octet_aligned->buf;
1348         }
1349         else if (r->which == Z_External_grs1)
1350         {
1351             if (!rec->wrbuf_marc)
1352                 rec->wrbuf_marc = wrbuf_alloc();
1353             wrbuf_rewind (rec->wrbuf_marc);
1354             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1355             if (len)
1356                 *len = wrbuf_len(rec->wrbuf_marc);
1357             return wrbuf_buf(rec->wrbuf_marc);
1358         }
1359         return 0;
1360     }
1361     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1362              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1363     {
1364         Z_External *r = (Z_External *) npr->u.databaseRecord;
1365         oident *ent = oid_getentbyoid(r->direct_reference);
1366
1367         if (r->which == Z_External_sutrs)
1368         {
1369             if (len) *len = r->u.sutrs->len;
1370             return (const char *) r->u.sutrs->buf;
1371         }
1372         else if (r->which == Z_External_octet)
1373         {
1374             yaz_marc_t mt;
1375             int marc_decode_type = YAZ_MARC_MARCXML;
1376
1377             if (!strcmp(type, "oai"))
1378                 marc_decode_type = YAZ_MARC_OAIMARC;
1379             switch (ent->value)
1380             {
1381             case VAL_SOIF:
1382             case VAL_HTML:
1383             case VAL_SUTRS:
1384                 break;
1385             case VAL_TEXT_XML:
1386             case VAL_APPLICATION_XML:
1387                 break;
1388             default:
1389                 if (!rec->wrbuf_marc)
1390                     rec->wrbuf_marc = wrbuf_alloc();
1391                 wrbuf_rewind (rec->wrbuf_marc);
1392                 mt = yaz_marc_create();
1393
1394                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1395                 if (yaz_marc_decode_wrbuf (
1396                         mt, (const char *) r->u.octet_aligned->buf,
1397                         r->u.octet_aligned->len,
1398                         rec->wrbuf_marc) > 0)
1399                 {
1400                     if (len)
1401                         *len = wrbuf_len(rec->wrbuf_marc);
1402                     yaz_marc_destroy(mt);
1403                     return wrbuf_buf(rec->wrbuf_marc);
1404                 }
1405                 yaz_marc_destroy(mt);
1406             }
1407             if (len) *len = r->u.octet_aligned->len;
1408             return (const char *) r->u.octet_aligned->buf;
1409         }
1410         else if (r->which == Z_External_grs1)
1411         {
1412             if (len) *len = 5;
1413             return "GRS-1";
1414         }
1415         return 0;
1416     }
1417     else if (!strcmp (type, "raw"))
1418     {
1419         if (npr->which == Z_NamePlusRecord_databaseRecord)
1420         {
1421             Z_External *r = (Z_External *) npr->u.databaseRecord;
1422
1423             if (r->which == Z_External_sutrs)
1424             {
1425                 if (len) *len = r->u.sutrs->len;
1426                 return (const char *) r->u.sutrs->buf;
1427             }
1428             else if (r->which == Z_External_octet)
1429             {
1430                 if (len) *len = r->u.octet_aligned->len;
1431                 return (const char *) r->u.octet_aligned->buf;
1432             }
1433             else /* grs-1, explain, ... */
1434             {
1435                 if (len) *len = -1;
1436                 return (const char *) npr->u.databaseRecord;
1437             }
1438         }
1439         return 0;
1440     }
1441     else if (!strcmp (type, "ext"))
1442     {
1443         if (npr->which == Z_NamePlusRecord_databaseRecord)
1444             return (const char *) npr->u.databaseRecord;
1445         return 0;
1446     }
1447     return 0;
1448 }
1449
1450 static int strcmp_null(const char *v1, const char *v2)
1451 {
1452     if (!v1 && !v2)
1453         return 0;
1454     if (!v1 || !v2)
1455         return -1;
1456     return strcmp(v1, v2);
1457 }
1458
1459 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1460                               int pos)
1461 {
1462     ZOOM_record_cache rc;
1463     const char *elementSetName =
1464         ZOOM_resultset_option_get (r, "elementSetName");
1465     const char *syntax =
1466         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1467
1468     for (rc = r->record_cache; rc; rc = rc->next)
1469     {
1470         if (pos == rc->pos)
1471         {
1472             if (strcmp_null(r->schema, rc->schema))
1473                 continue;
1474             if (strcmp_null(elementSetName,rc->elementSetName))
1475                 continue;
1476             if (strcmp_null(syntax, rc->syntax))
1477                 continue;
1478             /* not destroying rc->npr (it's handled by nmem )*/
1479             rc->rec.npr = npr;
1480             /* keeping wrbuf_marc too */
1481             return;
1482         }
1483     }
1484     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1485     rc->rec.npr = npr;
1486     rc->rec.odr = 0;
1487     rc->rec.wrbuf_marc = 0;
1488     if (elementSetName)
1489         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1490     else
1491         rc->elementSetName = 0;
1492
1493     if (syntax)
1494         rc->syntax = odr_strdup (r->odr, syntax);
1495     else
1496         rc->syntax = 0;
1497
1498     if (r->schema)
1499         rc->schema = odr_strdup (r->odr, r->schema);
1500     else
1501         rc->schema = 0;
1502
1503     rc->pos = pos;
1504     rc->next = r->record_cache;
1505     r->record_cache = rc;
1506 }
1507
1508 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1509 {
1510     ZOOM_record_cache rc;
1511     const char *elementSetName =
1512         ZOOM_resultset_option_get (r, "elementSetName");
1513     const char *syntax =
1514         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1515
1516     for (rc = r->record_cache; rc; rc = rc->next)
1517     {
1518         if (pos == rc->pos)
1519         {
1520             if (strcmp_null(r->schema, rc->schema))
1521                 continue;
1522             if (strcmp_null(elementSetName,rc->elementSetName))
1523                 continue;
1524             if (strcmp_null(syntax, rc->syntax))
1525                 continue;
1526             return &rc->rec;
1527         }
1528     }
1529     return 0;
1530 }
1531
1532 static void handle_records (ZOOM_connection c, Z_Records *sr,
1533                             int present_phase)
1534 {
1535     ZOOM_resultset resultset;
1536
1537     if (!c->tasks)
1538         return ;
1539     switch (c->tasks->which)
1540     {
1541     case ZOOM_TASK_SEARCH:
1542         resultset = c->tasks->u.search.resultset;
1543         break;
1544     case ZOOM_TASK_RETRIEVE:
1545         resultset = c->tasks->u.retrieve.resultset;
1546         break;
1547     default:
1548         return;
1549     }
1550     if (sr && sr->which == Z_Records_NSD)
1551     {
1552         Z_DiagRec dr, *dr_p = &dr;
1553         dr.which = Z_DiagRec_defaultFormat;
1554         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1555
1556         response_diag (c, dr_p);
1557     }
1558     else if (sr && sr->which == Z_Records_multipleNSD)
1559     {
1560         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1561             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1562         else
1563             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1564     }
1565     else
1566     {
1567         if (resultset->count + resultset->start > resultset->size)
1568             resultset->count = resultset->size - resultset->start;
1569         if (resultset->count < 0)
1570             resultset->count = 0;
1571         if (sr && sr->which == Z_Records_DBOSD)
1572         {
1573             int i;
1574             NMEM nmem = odr_extract_mem (c->odr_in);
1575             Z_NamePlusRecordList *p =
1576                 sr->u.databaseOrSurDiagnostics;
1577             for (i = 0; i<p->num_records; i++)
1578             {
1579                 record_cache_add (resultset, p->records[i],
1580                                   i+ resultset->start);
1581             }
1582             /* transfer our response to search_nmem .. we need it later */
1583             nmem_transfer (resultset->odr->mem, nmem);
1584             nmem_destroy (nmem);
1585             if (present_phase && p->num_records == 0)
1586             {
1587                 /* present response and we didn't get any records! */
1588                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1589             }
1590         }
1591         else if (present_phase)
1592         {
1593             /* present response and we didn't get any records! */
1594             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1595         }
1596     }
1597 }
1598
1599 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1600 {
1601     handle_records (c, pr->records, 1);
1602 }
1603
1604 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1605 {
1606     ZOOM_resultset resultset;
1607
1608     yaz_log (LOG_DEBUG, "got search response");
1609
1610     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1611         return ;
1612
1613     resultset = c->tasks->u.search.resultset;
1614
1615     resultset->size = *sr->resultCount;
1616     handle_records (c, sr->records, 0);
1617 }
1618
1619 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1620 {
1621     if (res->diagnostics && res->num_diagnostics > 0)
1622         response_diag (c, res->diagnostics[0]);
1623 }
1624
1625 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1626 {
1627     NMEM nmem = odr_extract_mem (c->odr_in);
1628     ZOOM_scanset scan;
1629
1630     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1631         return 0;
1632     scan = c->tasks->u.scan.scan;
1633
1634     if (res->entries && res->entries->nonsurrogateDiagnostics)
1635         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1636     scan->scan_response = res;
1637     nmem_transfer (scan->odr->mem, nmem);
1638     if (res->stepSize)
1639         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1640     if (res->positionOfTerm)
1641         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1642     if (res->scanStatus)
1643         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1644     if (res->numberOfEntriesReturned)
1645         ZOOM_options_set_int (scan->options, "number",
1646                               *res->numberOfEntriesReturned);
1647     nmem_destroy (nmem);
1648     return 1;
1649 }
1650
1651 static zoom_ret send_sort (ZOOM_connection c)
1652 {
1653     ZOOM_resultset  resultset;
1654
1655     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1656         return zoom_complete;
1657
1658     resultset = c->tasks->u.search.resultset;
1659
1660     if (c->error)
1661     {
1662         resultset->r_sort_spec = 0;
1663         return zoom_complete;
1664     }
1665     if (resultset->r_sort_spec)
1666     {
1667         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1668         Z_SortRequest *req = apdu->u.sortRequest;
1669
1670         req->num_inputResultSetNames = 1;
1671         req->inputResultSetNames = (Z_InternationalString **)
1672             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1673         req->inputResultSetNames[0] =
1674             odr_strdup (c->odr_out, resultset->setname);
1675         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1676         req->sortSequence = resultset->r_sort_spec;
1677         resultset->r_sort_spec = 0;
1678         return send_APDU (c, apdu);
1679     }
1680     return zoom_complete;
1681 }
1682
1683 static zoom_ret send_present (ZOOM_connection c)
1684 {
1685     Z_APDU *apdu = 0;
1686     Z_PresentRequest *req = 0;
1687     int i = 0;
1688     const char *syntax = 0;
1689     const char *elementSetName = 0;
1690     ZOOM_resultset  resultset;
1691
1692     if (!c->tasks)
1693         return zoom_complete;
1694
1695     switch (c->tasks->which)
1696     {
1697     case ZOOM_TASK_SEARCH:
1698         resultset = c->tasks->u.search.resultset;
1699         break;
1700     case ZOOM_TASK_RETRIEVE:
1701         resultset = c->tasks->u.retrieve.resultset;
1702         resultset->start = c->tasks->u.retrieve.start;
1703         resultset->count = c->tasks->u.retrieve.count;
1704
1705         if (resultset->start >= resultset->size)
1706             return zoom_complete;
1707         if (resultset->start + resultset->count > resultset->size)
1708             resultset->count = resultset->size - resultset->start;
1709         break;
1710     default:
1711         return zoom_complete;
1712     }
1713
1714     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1715     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1716
1717     if (c->error)                  /* don't continue on error */
1718         return zoom_complete;
1719     if (resultset->start < 0)
1720         return zoom_complete;
1721     for (i = 0; i<resultset->count; i++)
1722     {
1723         ZOOM_record rec =
1724             record_cache_lookup (resultset, i + resultset->start);
1725         if (!rec)
1726             break;
1727     }
1728     if (i == resultset->count)
1729         return zoom_complete;
1730
1731     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1732     req = apdu->u.presentRequest;
1733
1734     resultset->start += i;
1735     resultset->count -= i;
1736     *req->resultSetStartPoint = resultset->start + 1;
1737     *req->numberOfRecordsRequested = resultset->count;
1738     assert (*req->numberOfRecordsRequested > 0);
1739
1740     if (syntax && *syntax)
1741         req->preferredRecordSyntax =
1742             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1743
1744     if (resultset->schema && *resultset->schema)
1745     {
1746         Z_RecordComposition *compo = (Z_RecordComposition *)
1747             odr_malloc (c->odr_out, sizeof(*compo));
1748
1749         req->recordComposition = compo;
1750         compo->which = Z_RecordComp_complex;
1751         compo->u.complex = (Z_CompSpec *)
1752             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1753         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1754             odr_malloc(c->odr_out, sizeof(bool_t));
1755         *compo->u.complex->selectAlternativeSyntax = 0;
1756
1757         compo->u.complex->generic = (Z_Specification *)
1758             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1759
1760         compo->u.complex->generic->which = Z_Specification_oid;
1761         compo->u.complex->generic->u.oid = (Odr_oid *)
1762             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1763
1764         if (!compo->u.complex->generic->u.oid)
1765         {
1766             /* OID wasn't a schema! Try record syntax instead. */
1767
1768             compo->u.complex->generic->u.oid = (Odr_oid *)
1769                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1770         }
1771         if (elementSetName && *elementSetName)
1772         {
1773             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1774                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1775             compo->u.complex->generic->elementSpec->which =
1776                 Z_ElementSpec_elementSetName;
1777             compo->u.complex->generic->elementSpec->u.elementSetName =
1778                 odr_strdup (c->odr_out, elementSetName);
1779         }
1780         else
1781             compo->u.complex->generic->elementSpec = 0;
1782         compo->u.complex->num_dbSpecific = 0;
1783         compo->u.complex->dbSpecific = 0;
1784         compo->u.complex->num_recordSyntax = 0;
1785         compo->u.complex->recordSyntax = 0;
1786     }
1787     else if (elementSetName && *elementSetName)
1788     {
1789         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1790             odr_malloc (c->odr_out, sizeof(*esn));
1791         Z_RecordComposition *compo = (Z_RecordComposition *)
1792             odr_malloc (c->odr_out, sizeof(*compo));
1793
1794         esn->which = Z_ElementSetNames_generic;
1795         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1796         compo->which = Z_RecordComp_simple;
1797         compo->u.simple = esn;
1798         req->recordComposition = compo;
1799     }
1800     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1801     return send_APDU (c, apdu);
1802 }
1803
1804 ZOOM_API(ZOOM_scanset)
1805 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1806 {
1807     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1808
1809     scan->connection = c;
1810     scan->odr = odr_createmem (ODR_DECODE);
1811     scan->options = ZOOM_options_create_with_parent (c->options);
1812     scan->refcount = 1;
1813     scan->scan_response = 0;
1814
1815     if ((scan->termListAndStartPoint =
1816          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1817                       start)))
1818     {
1819         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1820         task->u.scan.scan = scan;
1821
1822         (scan->refcount)++;
1823         if (!c->async)
1824         {
1825             while (ZOOM_event (1, &c))
1826                 ;
1827         }
1828     }
1829     return scan;
1830 }
1831
1832 ZOOM_API(void)
1833 ZOOM_scanset_destroy (ZOOM_scanset scan)
1834 {
1835     if (!scan)
1836         return;
1837     (scan->refcount)--;
1838     if (scan->refcount == 0)
1839     {
1840         odr_destroy (scan->odr);
1841
1842         ZOOM_options_destroy (scan->options);
1843         xfree (scan);
1844     }
1845 }
1846
1847 static zoom_ret send_package (ZOOM_connection c)
1848 {
1849     ZOOM_Event event;
1850     if (!c->tasks)
1851         return zoom_complete;
1852     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1853
1854     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1855     ZOOM_connection_put_event (c, event);
1856
1857     return do_write_ex (c, c->tasks->u.package->buf_out,
1858                         c->tasks->u.package->len_out);
1859 }
1860
1861 static zoom_ret send_scan (ZOOM_connection c)
1862 {
1863     ZOOM_scanset scan;
1864     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1865     Z_ScanRequest *req = apdu->u.scanRequest;
1866     if (!c->tasks)
1867         return zoom_complete;
1868     assert (c->tasks->which == ZOOM_TASK_SCAN);
1869     scan = c->tasks->u.scan.scan;
1870
1871     req->termListAndStartPoint = scan->termListAndStartPoint;
1872     req->attributeSet = scan->attributeSet;
1873
1874     *req->numberOfTermsRequested =
1875         ZOOM_options_get_int(scan->options, "number", 10);
1876
1877     req->preferredPositionInResponse =
1878         odr_intdup (c->odr_out,
1879                     ZOOM_options_get_int(scan->options, "position", 1));
1880
1881     req->stepSize =
1882         odr_intdup (c->odr_out,
1883                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1884
1885     req->databaseNames = set_DatabaseNames (c, scan->options,
1886                                             &req->num_databaseNames);
1887
1888     return send_APDU (c, apdu);
1889 }
1890
1891 ZOOM_API(size_t)
1892 ZOOM_scanset_size (ZOOM_scanset scan)
1893 {
1894     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1895         return 0;
1896     return scan->scan_response->entries->num_entries;
1897 }
1898
1899 ZOOM_API(const char *)
1900 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1901                                int *occ, int *len)
1902 {
1903     const char *term = 0;
1904     size_t noent = ZOOM_scanset_size (scan);
1905     Z_ScanResponse *res = scan->scan_response;
1906
1907     *len = 0;
1908     *occ = 0;
1909     if (pos >= noent)
1910         return 0;
1911     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1912     {
1913         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1914
1915         if (t->term->which == Z_Term_general)
1916         {
1917             term = (const char *) t->term->u.general->buf;
1918             *len = t->term->u.general->len;
1919         }
1920         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1921     }
1922     return term;
1923 }
1924
1925 ZOOM_API(const char *)
1926 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1927 {
1928     return ZOOM_options_get (scan->options, key);
1929 }
1930
1931 ZOOM_API(void)
1932 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1933                               const char *val)
1934 {
1935     ZOOM_options_set (scan->options, key, val);
1936 }
1937
1938 static Z_APDU *create_es_package (ZOOM_package p, int type)
1939 {
1940     const char *str;
1941     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1942     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1943
1944     *req->function = Z_ExtendedServicesRequest_create;
1945
1946     str = ZOOM_options_get(p->options, "package-name");
1947     if (str && *str)
1948         req->packageName = nmem_strdup (p->odr_out->mem, str);
1949
1950     str = ZOOM_options_get(p->options, "user-id");
1951     if (str)
1952         req->userId = nmem_strdup (p->odr_out->mem, str);
1953
1954     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1955                                               type);
1956
1957     str = ZOOM_options_get(p->options, "function");
1958     if (str)
1959     {
1960         if (!strcmp (str, "create"))
1961             *req->function = 1;
1962         if (!strcmp (str, "delete"))
1963             *req->function = 2;
1964         if (!strcmp (str, "modify"))
1965             *req->function = 3;
1966     }
1967     return apdu;
1968 }
1969
1970 static const char *ill_array_lookup (void *clientData, const char *idx)
1971 {
1972     ZOOM_package p = (ZOOM_package) clientData;
1973     return ZOOM_options_get (p->options, idx+4);
1974 }
1975
1976 static Z_External *encode_ill_request (ZOOM_package p)
1977 {
1978     ODR out = p->odr_out;
1979     ILL_Request *req;
1980     Z_External *r = 0;
1981     struct ill_get_ctl ctl;
1982
1983     ctl.odr = p->odr_out;
1984     ctl.clientData = p;
1985     ctl.f = ill_array_lookup;
1986
1987     req = ill_get_ILLRequest(&ctl, "ill", 0);
1988
1989     if (!ill_Request (out, &req, 0, 0))
1990     {
1991         int ill_request_size;
1992         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
1993         if (ill_request_buf)
1994             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
1995         return 0;
1996     }
1997     else
1998     {
1999         oident oid;
2000         int illRequest_size = 0;
2001         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2002
2003         oid.proto = PROTO_GENERAL;
2004         oid.oclass = CLASS_GENERAL;
2005         oid.value = VAL_ISO_ILL_1;
2006
2007         r = (Z_External *) odr_malloc (out, sizeof(*r));
2008         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2009         r->indirect_reference = 0;
2010         r->descriptor = 0;
2011         r->which = Z_External_single;
2012
2013         r->u.single_ASN1_type = (Odr_oct *)
2014             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2015         r->u.single_ASN1_type->buf = (unsigned char*)
2016             odr_malloc (out, illRequest_size);
2017         r->u.single_ASN1_type->len = illRequest_size;
2018         r->u.single_ASN1_type->size = illRequest_size;
2019         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2020     }
2021     return r;
2022 }
2023
2024 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2025 {
2026     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2027     const char *str;
2028
2029     req->which=Z_IOItemOrder_esRequest;
2030     req->u.esRequest = (Z_IORequest *)
2031         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2032
2033     /* to keep part ... */
2034     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2035         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2036     req->u.esRequest->toKeep->supplDescription = 0;
2037     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2038         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2039
2040     str = ZOOM_options_get(p->options, "contact-name");
2041     req->u.esRequest->toKeep->contact->name = str ?
2042         nmem_strdup (p->odr_out->mem, str) : 0;
2043
2044     str = ZOOM_options_get(p->options, "contact-phone");
2045     req->u.esRequest->toKeep->contact->phone = str ?
2046         nmem_strdup (p->odr_out->mem, str) : 0;
2047
2048     str = ZOOM_options_get(p->options, "contact-email");
2049     req->u.esRequest->toKeep->contact->email = str ?
2050         nmem_strdup (p->odr_out->mem, str) : 0;
2051
2052     req->u.esRequest->toKeep->addlBilling = 0;
2053
2054     /* not to keep part ... */
2055     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2056         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2057
2058     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2059         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2060
2061     str = ZOOM_options_get(p->options, "itemorder-setname");
2062     if (!str)
2063         str = "default";
2064     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2065         nmem_strdup (p->odr_out->mem, str);
2066     req->u.esRequest->notToKeep->resultSetItem->item =
2067         (int *) odr_malloc(p->odr_out, sizeof(int));
2068
2069     str = ZOOM_options_get(p->options, "itemorder-item");
2070     *req->u.esRequest->notToKeep->resultSetItem->item =
2071         (str ? atoi(str) : 1);
2072
2073     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2074
2075     return req;
2076 }
2077
2078 ZOOM_API(void)
2079     ZOOM_package_send (ZOOM_package p, const char *type)
2080 {
2081     Z_APDU *apdu = 0;
2082     ZOOM_connection c;
2083     if (!p)
2084         return;
2085     c = p->connection;
2086     odr_reset (p->odr_out);
2087     xfree (p->buf_out);
2088     p->buf_out = 0;
2089     if (!strcmp(type, "itemorder"))
2090     {
2091         Z_External *r;
2092         apdu = create_es_package (p, VAL_ITEMORDER);
2093         if (apdu)
2094         {
2095             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2096
2097             r->direct_reference =
2098                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2099                                        VAL_ITEMORDER);
2100             r->descriptor = 0;
2101             r->which = Z_External_itemOrder;
2102             r->indirect_reference = 0;
2103             r->u.itemOrder = encode_item_order (p);
2104
2105             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2106         }
2107     }
2108     if (apdu)
2109     {
2110         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2111         {
2112             char *buf;
2113
2114             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2115             task->u.package = p;
2116             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2117             p->buf_out = (char *) xmalloc (p->len_out);
2118             memcpy (p->buf_out, buf, p->len_out);
2119
2120             (p->refcount)++;
2121             if (!c->async)
2122             {
2123                 while (ZOOM_event (1, &c))
2124                     ;
2125             }
2126         }
2127     }
2128 }
2129
2130 ZOOM_API(ZOOM_package)
2131     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2132 {
2133     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2134
2135     p->connection = c;
2136     p->odr_out = odr_createmem (ODR_ENCODE);
2137     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2138     p->refcount = 1;
2139     p->buf_out = 0;
2140     p->len_out = 0;
2141     return p;
2142 }
2143
2144 ZOOM_API(void)
2145     ZOOM_package_destroy(ZOOM_package p)
2146 {
2147     if (!p)
2148         return;
2149     (p->refcount)--;
2150     if (p->refcount == 0)
2151     {
2152         odr_destroy (p->odr_out);
2153         xfree (p->buf_out);
2154
2155         ZOOM_options_destroy (p->options);
2156         xfree (p);
2157     }
2158 }
2159
2160 ZOOM_API(const char *)
2161 ZOOM_package_option_get (ZOOM_package p, const char *key)
2162 {
2163     return ZOOM_options_get (p->options, key);
2164 }
2165
2166
2167 ZOOM_API(void)
2168 ZOOM_package_option_set (ZOOM_package p, const char *key,
2169                               const char *val)
2170 {
2171     ZOOM_options_set (p->options, key, val);
2172 }
2173
2174 static int ZOOM_connection_exec_task (ZOOM_connection c)
2175 {
2176     ZOOM_task task = c->tasks;
2177     zoom_ret ret = zoom_complete;
2178
2179     if (!task)
2180     {
2181         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2182         return 0;
2183     }
2184     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2185              task->which, task->running);
2186     if (c->error != ZOOM_ERROR_NONE)
2187     {
2188         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2189         ZOOM_connection_remove_tasks (c);
2190         return 0;
2191     }
2192     if (task->running)
2193     {
2194         yaz_log (LOG_DEBUG, "task already running");
2195         return 0;
2196     }
2197     task->running = 1;
2198     ret = zoom_complete;
2199     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2200     {
2201         switch (task->which)
2202         {
2203         case ZOOM_TASK_SEARCH:
2204             if (c->proto == PROTO_SRW)
2205                 ret = ZOOM_connection_srw_send_search(c);
2206             else
2207                 ret = ZOOM_connection_send_search(c);
2208             break;
2209         case ZOOM_TASK_RETRIEVE:
2210             if (c->proto == PROTO_SRW)
2211                 ret = ZOOM_connection_srw_send_search(c);
2212             else
2213                 ret = send_present (c);
2214             break;
2215         case ZOOM_TASK_CONNECT:
2216             ret = do_connect(c);
2217             break;
2218         case ZOOM_TASK_SCAN:
2219             ret = send_scan(c);
2220             break;
2221         case ZOOM_TASK_PACKAGE:
2222             ret = send_package(c);
2223             break;
2224         }
2225     }
2226     else
2227     {
2228         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2229         ZOOM_connection_remove_tasks (c);
2230     }
2231     if (ret == zoom_complete)
2232     {
2233         yaz_log (LOG_DEBUG, "task removed (complete)");
2234         ZOOM_connection_remove_task (c);
2235         return 0;
2236     }
2237     yaz_log (LOG_DEBUG, "task pending");
2238     return 1;
2239 }
2240
2241 static zoom_ret send_sort_present (ZOOM_connection c)
2242 {
2243     zoom_ret r = send_sort (c);
2244     if (r == zoom_complete)
2245         r = send_present (c);
2246     return r;
2247 }
2248
2249 static int es_response (ZOOM_connection c,
2250                         Z_ExtendedServicesResponse *res)
2251 {
2252     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2253         return 0;
2254     if (res->diagnostics && res->num_diagnostics > 0)
2255         response_diag(c, res->diagnostics[0]);
2256     if (res->taskPackage &&
2257         res->taskPackage->which == Z_External_extendedService)
2258     {
2259         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2260         Odr_oct *id = taskPackage->targetReference;
2261
2262         if (id)
2263             ZOOM_options_setl (c->tasks->u.package->options,
2264                                "targetReference", (char*) id->buf, id->len);
2265     }
2266     return 1;
2267 }
2268
2269
2270 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2271 {
2272     Z_InitResponse *initrs;
2273
2274     c->mask = 0;
2275     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2276     switch(apdu->which)
2277     {
2278     case Z_APDU_initResponse:
2279         initrs = apdu->u.initResponse;
2280         ZOOM_connection_option_set(c, "targetImplementationId",
2281                                    initrs->implementationId ?
2282                                    initrs->implementationId : "");
2283         ZOOM_connection_option_set(c, "targetImplementationName",
2284                                    initrs->implementationName ?
2285                                    initrs->implementationName : "");
2286         ZOOM_connection_option_set(c, "targetImplementationVersion",
2287                                    initrs->implementationVersion ?
2288                                    initrs->implementationVersion : "");
2289         if (!*initrs->result)
2290         {
2291             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2292         }
2293         else
2294         {
2295             char *cookie =
2296                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2297                                           VAL_COOKIE, 1, 0);
2298             xfree (c->cookie_in);
2299             c->cookie_in = 0;
2300             if (cookie)
2301                 c->cookie_in = xstrdup(cookie);
2302             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2303                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2304                 c->support_named_resultsets = 1;
2305             if (c->tasks)
2306             {
2307                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2308                 ZOOM_connection_remove_task (c);
2309             }
2310             ZOOM_connection_exec_task (c);
2311         }
2312         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2313         {
2314             NMEM tmpmem = nmem_create();
2315             Z_CharSetandLanguageNegotiation *p =
2316                 yaz_get_charneg_record(initrs->otherInfo);
2317
2318             if (p)
2319             {
2320                 char *charset=NULL, *lang=NULL;
2321                 int sel;
2322
2323                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2324                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2325                         "language %s, select %d",
2326                         charset ? charset : "none", lang ? lang : "none", sel);
2327                 if (charset)
2328                     ZOOM_connection_option_set (c, "negotiation-charset",
2329                                                 charset);
2330                 if (lang)
2331                     ZOOM_connection_option_set (c, "negotiation-lang",
2332                                                 lang);
2333                 nmem_destroy(tmpmem);
2334             }
2335         }
2336         break;
2337     case Z_APDU_searchResponse:
2338         handle_search_response (c, apdu->u.searchResponse);
2339         if (send_sort_present (c) == zoom_complete)
2340             ZOOM_connection_remove_task (c);
2341         break;
2342     case Z_APDU_presentResponse:
2343         handle_present_response (c, apdu->u.presentResponse);
2344         if (send_present (c) == zoom_complete)
2345             ZOOM_connection_remove_task (c);
2346         break;
2347     case Z_APDU_sortResponse:
2348         sort_response (c, apdu->u.sortResponse);
2349         if (send_present (c) == zoom_complete)
2350             ZOOM_connection_remove_task (c);
2351         break;
2352     case Z_APDU_scanResponse:
2353         scan_response (c, apdu->u.scanResponse);
2354         ZOOM_connection_remove_task (c);
2355         break;
2356     case Z_APDU_extendedServicesResponse:
2357         es_response (c, apdu->u.extendedServicesResponse);
2358         ZOOM_connection_remove_task (c);
2359         break;
2360     case Z_APDU_close:
2361         if (c->reconnect_ok)
2362         {
2363             do_close(c);
2364             c->tasks->running = 0;
2365             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2366         }
2367         else
2368         {
2369             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2370             do_close(c);
2371         }
2372         break;
2373     default:
2374         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2375         do_close(c);
2376     }
2377 }
2378
2379 #if HAVE_XSLT
2380 static void handle_srw_response(ZOOM_connection c,
2381                                 Z_SRW_searchRetrieveResponse *res)
2382 {
2383     ZOOM_resultset resultset = 0;
2384     int i;
2385     NMEM nmem;
2386
2387     if (!c->tasks)
2388         return;
2389
2390     if (c->tasks->which == ZOOM_TASK_SEARCH)
2391         resultset = c->tasks->u.search.resultset;
2392     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2393         resultset = c->tasks->u.retrieve.resultset;
2394     else
2395         return ;
2396
2397     resultset->size = 0;
2398
2399     yaz_log(LOG_LOG, "got SRW response OK");
2400
2401     if (res->numberOfRecords)
2402         resultset->size = *res->numberOfRecords;
2403
2404     for (i = 0; i<res->num_records; i++)
2405     {
2406         int pos;
2407
2408         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2409             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2410
2411         if (res->records[i].recordPosition &&
2412             *res->records[i].recordPosition > 0)
2413             pos = *res->records[i].recordPosition - 1;
2414         else
2415             pos = resultset->start + i;
2416
2417         npr->databaseName = 0;
2418         npr->which = Z_NamePlusRecord_databaseRecord;
2419         npr->u.databaseRecord = (Z_External *)
2420             odr_malloc(c->odr_in, sizeof(Z_External));
2421         npr->u.databaseRecord->descriptor = 0;
2422         npr->u.databaseRecord->direct_reference =
2423             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2424         npr->u.databaseRecord->which = Z_External_octet;
2425         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2426             odr_malloc(c->odr_in, sizeof(Odr_oct));
2427         npr->u.databaseRecord->u.octet_aligned->buf =
2428             res->records[i].recordData_buf;
2429         npr->u.databaseRecord->u.octet_aligned->len =
2430             npr->u.databaseRecord->u.octet_aligned->size =
2431             res->records[i].recordData_len;
2432         record_cache_add (resultset, npr, pos);
2433         yaz_log(LOG_LOG, "add SRW record to cache to pos %d", pos);
2434     }
2435     if (res->num_diagnostics > 0)
2436     {
2437         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2438                        res->diagnostics[0].details, 0);
2439     }
2440     nmem = odr_extract_mem(c->odr_in);
2441     nmem_transfer(resultset->odr->mem, nmem);
2442     nmem_destroy(nmem);
2443 }
2444 #endif
2445
2446 #if HAVE_XSLT
2447 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2448 {
2449     int ret = -1;
2450     const char *content_type = z_HTTP_header_lookup(hres->headers,
2451                                                     "Content-Type");
2452     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2453                                                        "Connection");
2454     c->mask = 0;
2455     yaz_log (LOG_DEBUG, "handle_http");
2456
2457     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2458     {
2459         Z_SOAP *soap_package = 0;
2460         ODR o = odr_createmem(ODR_DECODE);
2461         Z_SOAP_Handler soap_handlers[2] = {
2462             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2463              (Z_SOAP_fun) yaz_srw_codec},
2464             {0, 0, 0}
2465         };
2466         ret = z_soap_codec(o, &soap_package,
2467                            &hres->content_buf, &hres->content_len,
2468                            soap_handlers);
2469         if (!ret && soap_package->which == Z_SOAP_generic &&
2470             soap_package->u.generic->no == 0)
2471         {
2472             Z_SRW_searchRetrieve *sr = soap_package->u.generic->p;
2473             if (sr->which == Z_SRW_searchRetrieve_response)
2474                 handle_srw_response(c, sr->u.response);
2475             else
2476                 ret = -1;
2477         }
2478         else if (!ret && (soap_package->which == Z_SOAP_fault
2479                           || soap_package->which == Z_SOAP_error))
2480         {
2481             set_HTTP_error(c, hres->code,
2482                            soap_package->u.fault->fault_code,
2483                            soap_package->u.fault->fault_string);
2484         }
2485         else
2486             ret = -1;
2487         odr_destroy(o);
2488     }
2489     if (ret)
2490     {
2491         if (hres->code != 200)
2492             set_HTTP_error(c, hres->code, 0, 0);
2493         else
2494             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2495         do_close (c);
2496     }
2497     ZOOM_connection_remove_task(c);
2498     if (!strcmp(hres->version, "1.0"))
2499     {
2500         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2501         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2502             do_close(c);
2503     }
2504     else
2505     {
2506         /* HTTP 1.1: only if no close we stay alive .. */
2507         if (connection_head && !strcmp(connection_head, "close"))
2508             do_close(c);
2509     }
2510 }
2511 #endif
2512
2513 static int do_read (ZOOM_connection c)
2514 {
2515     int r;
2516     ZOOM_Event event;
2517
2518     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2519     ZOOM_connection_put_event (c, event);
2520
2521     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2522
2523     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2524     if (r == 1)
2525         return 0;
2526     if (r <= 0)
2527     {
2528         if (c->reconnect_ok)
2529         {
2530             do_close (c);
2531             c->reconnect_ok = 0;
2532             yaz_log (LOG_DEBUG, "reconnect read");
2533             c->tasks->running = 0;
2534             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2535         }
2536         else
2537         {
2538             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2539             do_close (c);
2540         }
2541     }
2542     else
2543     {
2544         Z_GDU *gdu;
2545         ZOOM_Event event;
2546         odr_reset (c->odr_in);
2547         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2548         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2549         ZOOM_connection_put_event (c, event);
2550
2551         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2552         {
2553             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2554             do_close (c);
2555         }
2556         else if (gdu->which == Z_GDU_Z3950)
2557             handle_apdu (c, gdu->u.z3950);
2558         else if (gdu->which == Z_GDU_HTTP_Response)
2559         {
2560 #if HAVE_XSLT
2561             handle_http (c, gdu->u.HTTP_Response);
2562 #else
2563             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2564             do_close (c);
2565 #endif
2566         }
2567         c->reconnect_ok = 0;
2568     }
2569     return 1;
2570 }
2571
2572 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2573 {
2574     int r;
2575     ZOOM_Event event;
2576
2577     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2578     ZOOM_connection_put_event (c, event);
2579
2580     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2581     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2582     {
2583         if (c->reconnect_ok)
2584         {
2585             do_close (c);
2586             c->reconnect_ok = 0;
2587             yaz_log (LOG_DEBUG, "reconnect write");
2588             c->tasks->running = 0;
2589             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2590             return zoom_complete;
2591         }
2592         if (c->state == STATE_CONNECTING)
2593             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2594         else
2595             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2596         do_close (c);
2597         return zoom_complete;
2598     }
2599     else if (r == 1)
2600     {
2601         c->mask = ZOOM_SELECT_EXCEPT;
2602         if (c->cs->io_pending & CS_WANT_WRITE)
2603             c->mask += ZOOM_SELECT_WRITE;
2604         if (c->cs->io_pending & CS_WANT_READ)
2605             c->mask += ZOOM_SELECT_READ;
2606         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2607     }
2608     else
2609     {
2610         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2611         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2612     }
2613     return zoom_pending;
2614 }
2615
2616 static zoom_ret do_write(ZOOM_connection c)
2617 {
2618     return do_write_ex (c, c->buf_out, c->len_out);
2619 }
2620
2621
2622 ZOOM_API(const char *)
2623 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2624 {
2625     return ZOOM_options_get (c->options, key);
2626 }
2627
2628 ZOOM_API(void)
2629 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2630                                   const char *val)
2631 {
2632     ZOOM_options_set (c->options, key, val);
2633 }
2634
2635 ZOOM_API(const char *)
2636 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2637 {
2638     return ZOOM_options_get (r->options, key);
2639 }
2640
2641 ZOOM_API(void)
2642 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2643                                   const char *val)
2644 {
2645     ZOOM_options_set (r->options, key, val);
2646 }
2647
2648
2649 ZOOM_API(int)
2650 ZOOM_connection_errcode (ZOOM_connection c)
2651 {
2652     return ZOOM_connection_error (c, 0, 0);
2653 }
2654
2655 ZOOM_API(const char *)
2656 ZOOM_connection_errmsg (ZOOM_connection c)
2657 {
2658     const char *msg;
2659     ZOOM_connection_error (c, &msg, 0);
2660     return msg;
2661 }
2662
2663 ZOOM_API(const char *)
2664 ZOOM_connection_addinfo (ZOOM_connection c)
2665 {
2666     const char *addinfo;
2667     ZOOM_connection_error (c, 0, &addinfo);
2668     return addinfo;
2669 }
2670
2671 ZOOM_API(const char *)
2672 ZOOM_diag_str (int error)
2673 {
2674     switch (error)
2675     {
2676     case ZOOM_ERROR_NONE:
2677         return "No error";
2678     case ZOOM_ERROR_CONNECT:
2679         return "Connect failed";
2680     case ZOOM_ERROR_MEMORY:
2681         return "Out of memory";
2682     case ZOOM_ERROR_ENCODE:
2683         return "Encoding failed";
2684     case ZOOM_ERROR_DECODE:
2685         return "Decoding failed";
2686     case ZOOM_ERROR_CONNECTION_LOST:
2687         return "Connection lost";
2688     case ZOOM_ERROR_INIT:
2689         return "Init rejected";
2690     case ZOOM_ERROR_INTERNAL:
2691         return "Internal failure";
2692     case ZOOM_ERROR_TIMEOUT:
2693         return "Timeout";
2694     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2695         return "Unsupported protocol";
2696     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2697         return "Unsupported query type";
2698     default:
2699         return diagbib1_str (error);
2700     }
2701 }
2702
2703 ZOOM_API(int)
2704 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2705                          const char **addinfo, const char **diagset)
2706 {
2707     int error = c->error;
2708     if (cp)
2709     {
2710         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2711             *cp = ZOOM_diag_str(error);
2712         else if (!strcmp(c->diagset, "HTTP"))
2713             *cp = z_HTTP_errmsg(c->error);
2714         else if (!strcmp(c->diagset, "Bib-1"))
2715             *cp = ZOOM_diag_str(error);
2716         else if (!strcmp(c->diagset, "SRW"))
2717             *cp = yaz_srw_error_str(c->error);
2718         else
2719             *cp = "Unknown error and diagnostic set";
2720     }
2721     if (addinfo)
2722         *addinfo = c->addinfo ? c->addinfo : "";
2723     if (diagset)
2724         *diagset = c->diagset ? c->diagset : "";
2725     return c->error;
2726 }
2727
2728 ZOOM_API(int)
2729 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2730                        const char **addinfo)
2731 {
2732     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2733 }
2734
2735 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2736 {
2737     ZOOM_Event event = 0;
2738     int r = cs_look(c->cs);
2739     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2740              c, mask, r);
2741
2742     if (r == CS_NONE)
2743     {
2744         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2745         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2746         do_close (c);
2747         ZOOM_connection_put_event (c, event);
2748     }
2749     else if (r == CS_CONNECT)
2750     {
2751         int ret;
2752         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2753
2754         ret = cs_rcvconnect (c->cs);
2755         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2756         if (ret == 1)
2757         {
2758             c->mask = ZOOM_SELECT_EXCEPT;
2759             if (c->cs->io_pending & CS_WANT_WRITE)
2760                 c->mask += ZOOM_SELECT_WRITE;
2761             if (c->cs->io_pending & CS_WANT_READ)
2762                 c->mask += ZOOM_SELECT_READ;
2763             ZOOM_connection_put_event (c, event);
2764         }
2765         else if (ret == 0)
2766         {
2767             ZOOM_connection_put_event (c, event);
2768             if (c->proto == PROTO_Z3950)
2769                 ZOOM_connection_send_init(c);
2770             else
2771             {
2772                 /* no init request for SRW .. */
2773                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2774                 ZOOM_connection_remove_task (c);
2775                 c->mask = 0;
2776                 ZOOM_connection_exec_task (c);
2777             }
2778             c->state = STATE_ESTABLISHED;
2779         }
2780         else
2781         {
2782             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2783             do_close (c);
2784             ZOOM_connection_put_event (c, event);
2785         }
2786     }
2787     else
2788     {
2789         if (mask & ZOOM_SELECT_READ)
2790             do_read (c);
2791         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2792             do_write (c);
2793     }
2794     return 1;
2795 }
2796
2797 ZOOM_API(int)
2798 ZOOM_connection_last_event(ZOOM_connection cs)
2799 {
2800     if (!cs)
2801         return ZOOM_EVENT_NONE;
2802     return cs->last_event;
2803 }
2804
2805 ZOOM_API(int)
2806 ZOOM_event (int no, ZOOM_connection *cs)
2807 {
2808     int timeout = 5000;
2809 #if HAVE_SYS_POLL_H
2810     struct pollfd pollfds[1024];
2811     ZOOM_connection poll_cs[1024];
2812 #else
2813     struct timeval tv;
2814     fd_set input, output, except;
2815 #endif
2816     int i, r, nfds;
2817     int max_fd = 0;
2818
2819     for (i = 0; i<no; i++)
2820     {
2821         ZOOM_connection c = cs[i];
2822         ZOOM_Event event;
2823         if (c && (event = ZOOM_connection_get_event(c)))
2824         {
2825             ZOOM_Event_destroy (event);
2826             return i+1;
2827         }
2828     }
2829     for (i = 0; i<no; i++)
2830     {
2831         ZOOM_connection c = cs[i];
2832         ZOOM_Event event;
2833         if (c && ZOOM_connection_exec_task (c))
2834         {
2835             if ((event = ZOOM_connection_get_event(c)))
2836             {
2837                 ZOOM_Event_destroy (event);
2838                 return i+1;
2839             }
2840         }
2841     }
2842 #if HAVE_SYS_POLL_H
2843
2844 #else
2845     FD_ZERO (&input);
2846     FD_ZERO (&output);
2847     FD_ZERO (&except);
2848 #endif
2849     nfds = 0;
2850     for (i = 0; i<no; i++)
2851     {
2852         ZOOM_connection c = cs[i];
2853         int fd, mask;
2854         int this_timeout;
2855
2856         if (!c)
2857             continue;
2858         fd = z3950_connection_socket(c);
2859         mask = z3950_connection_mask(c);
2860
2861         if (fd == -1)
2862             continue;
2863         if (max_fd < fd)
2864             max_fd = fd;
2865
2866         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2867         if (this_timeout != -1 && this_timeout < timeout)
2868             timeout = this_timeout;
2869 #if HAVE_SYS_POLL_H
2870         if (mask)
2871         {
2872             short poll_events = 0;
2873
2874             if (mask & ZOOM_SELECT_READ)
2875                 poll_events += POLLIN;
2876             if (mask & ZOOM_SELECT_WRITE)
2877                 poll_events += POLLOUT;
2878             if (mask & ZOOM_SELECT_EXCEPT)
2879                 poll_events += POLLERR;
2880             pollfds[nfds].fd = fd;
2881             pollfds[nfds].events = poll_events;
2882             pollfds[nfds].revents = 0;
2883             poll_cs[nfds] = c;
2884             nfds++;
2885         }
2886 #else
2887         if (mask & ZOOM_SELECT_READ)
2888         {
2889             FD_SET (fd, &input);
2890             nfds++;
2891         }
2892         if (mask & ZOOM_SELECT_WRITE)
2893         {
2894             FD_SET (fd, &output);
2895             nfds++;
2896         }
2897         if (mask & ZOOM_SELECT_EXCEPT)
2898         {
2899             FD_SET (fd, &except);
2900             nfds++;
2901         }
2902 #endif
2903     }
2904     if (timeout >= 5000)
2905         timeout = 30;
2906
2907     if (!nfds)
2908         return 0;
2909
2910 #if HAVE_SYS_POLL_H
2911     r = poll (pollfds, nfds, timeout * 1000);
2912     for (i = 0; i<nfds; i++)
2913     {
2914         ZOOM_connection c = poll_cs[i];
2915         if (r && c->mask)
2916         {
2917             int mask = 0;
2918             if (pollfds[i].revents & POLLIN)
2919                 mask += ZOOM_SELECT_READ;
2920             if (pollfds[i].revents & POLLOUT)
2921                 mask += ZOOM_SELECT_WRITE;
2922             if (pollfds[i].revents & POLLERR)
2923                 mask += ZOOM_SELECT_EXCEPT;
2924             if (mask)
2925                 ZOOM_connection_do_io(c, mask);
2926         }
2927         else if (r == 0 && c->mask)
2928         {
2929             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2930             /* timeout and this connection was waiting */
2931             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2932             do_close (c);
2933             ZOOM_connection_put_event(c, event);
2934         }
2935     }
2936 #else
2937     tv.tv_sec = timeout;
2938     tv.tv_usec = 0;
2939     yaz_log (LOG_DEBUG, "select start");
2940     r = select (max_fd+1, &input, &output, &except, &tv);
2941     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2942     for (i = 0; i<no; i++)
2943     {
2944         ZOOM_connection c = cs[i];
2945         int fd, mask;
2946
2947         if (!c)
2948             continue;
2949         fd = z3950_connection_socket(c);
2950         mask = 0;
2951         if (r && c->mask)
2952         {
2953             /* no timeout and real socket */
2954             if (FD_ISSET(fd, &input))
2955                 mask += ZOOM_SELECT_READ;
2956             if (FD_ISSET(fd, &output))
2957                 mask += ZOOM_SELECT_WRITE;
2958             if (FD_ISSET(fd, &except))
2959                 mask += ZOOM_SELECT_EXCEPT;
2960             if (mask)
2961                 ZOOM_connection_do_io(c, mask);
2962         }
2963         if (r == 0 && c->mask)
2964         {
2965             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2966             /* timeout and this connection was waiting */
2967             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2968             do_close (c);
2969             yaz_log (LOG_DEBUG, "timeout");
2970             ZOOM_connection_put_event(c, event);
2971         }
2972     }
2973 #endif
2974     for (i = 0; i<no; i++)
2975     {
2976         ZOOM_connection c = cs[i];
2977         ZOOM_Event event;
2978         if (c && (event = ZOOM_connection_get_event(c)))
2979         {
2980             ZOOM_Event_destroy (event);
2981             return i+1;
2982         }
2983     }
2984     return 0;
2985 }