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 1.23 2003-02-18 09:12:14 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     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 113 }
 114
 115 static void set_ZOOM_error (ZOOM_connection c, int error,
 116                             const char *addinfo)
 117 {
 118     set_dset_error(c, error, "ZOOM", addinfo, 0);
 119 }
 120
 121 static void clear_error (ZOOM_connection c)
 122 {
 123
 124     switch (c->error)
 125     {
 126     case ZOOM_ERROR_CONNECT:
 127     case ZOOM_ERROR_MEMORY:
 128     case ZOOM_ERROR_DECODE:
 129     case ZOOM_ERROR_CONNECTION_LOST:
 130     case ZOOM_ERROR_INIT:
 131     case ZOOM_ERROR_INTERNAL:
 132     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 133         break;
 134     default:
 135         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 136     }
 137 }
 138
 139 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 140 {
 141     ZOOM_task *taskp = &c->tasks;
 142     while (*taskp)
 143         taskp = &(*taskp)->next;
 144     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 145     (*taskp)->running = 0;
 146     (*taskp)->which = which;
 147     (*taskp)->next = 0;
 148     clear_error (c);
 149     return *taskp;
 150 }
 151
 152 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 153 {
 154     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 155
 156     task->next = c->tasks;
 157     c->tasks = task;
 158
 159     task->running = 0;
 160     task->which = which;
 161     clear_error (c);
 162     return task;
 163 }
 164
 165 void ZOOM_connection_remove_task (ZOOM_connection c)
 166 {
 167     ZOOM_task task = c->tasks;
 168
 169     if (task)
 170     {
 171         c->tasks = task->next;
 172         switch (task->which)
 173         {
 174         case ZOOM_TASK_SEARCH:
 175             ZOOM_resultset_destroy (task->u.search.resultset);
 176             break;
 177         case ZOOM_TASK_RETRIEVE:
 178             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 179             break;
 180         case ZOOM_TASK_CONNECT:
 181             break;
 182         case ZOOM_TASK_SCAN:
 183             ZOOM_scanset_destroy (task->u.scan.scan);
 184             break;
 185         case ZOOM_TASK_PACKAGE:
 186             ZOOM_package_destroy (task->u.package);
 187             break;
 188         default:
 189             assert (0);
 190         }
 191         xfree (task);
 192     }
 193 }
 194
 195 static int ZOOM_connection_exec_task (ZOOM_connection c);
 196
 197 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 198 {
 199     while (c->tasks)
 200         ZOOM_connection_remove_task(c);
 201 }
 202
 203 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 204
 205 ZOOM_API(ZOOM_connection)
 206 ZOOM_connection_create (ZOOM_options options)
 207 {
 208     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 209
 210     c->proto = PROTO_Z3950;
 211     c->cs = 0;
 212     c->mask = 0;
 213     c->reconnect_ok = 0;
 214     c->state = STATE_IDLE;
 215     c->addinfo = 0;
 216     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 217     c->buf_in = 0;
 218     c->len_in = 0;
 219     c->buf_out = 0;
 220     c->len_out = 0;
 221     c->resultsets = 0;
 222
 223     c->options = ZOOM_options_create_with_parent(options);
 224
 225     c->host_port = 0;
 226     c->path = 0;
 227     c->proxy = 0;
 228
 229     c->charset = c->lang = 0;
 230
 231     c->cookie_out = 0;
 232     c->cookie_in = 0;
 233     c->client_IP = 0;
 234     c->tasks = 0;
 235
 236     c->odr_in = odr_createmem (ODR_DECODE);
 237     c->odr_out = odr_createmem (ODR_ENCODE);
 238
 239     c->async = 0;
 240     c->support_named_resultsets = 0;
 241     c->last_event = ZOOM_EVENT_NONE;
 242
 243     c->m_queue_front = 0;
 244     c->m_queue_back = 0;
 245     return c;
 246 }
 247
 248 /* set database names. Take local databases (if set); otherwise
 249    take databases given in ZURL (if set); otherwise use Default */
 250 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 251                                  int *num)
 252 {
 253     char **databaseNames;
 254     const char *c;
 255     int no = 2;
 256     const char *cp = ZOOM_options_get (options, "databaseName");
 257
 258     if (!cp || !*cp)
 259     {
 260         if (strncmp (con->host_port, "unix:", 5) == 0)
 261             cp = strchr (con->host_port+5, ':');
 262         else
 263             cp = strchr (con->host_port, '/');
 264         if (cp)
 265             cp++;
 266     }
 267     if (cp)
 268     {
 269         c = cp;
 270         while ((c = strchr(c, '+')))
 271         {
 272             c++;
 273             no++;
 274         }
 275     }
 276     else
 277         cp = "Default";
 278     databaseNames = (char**)
 279         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 280     no = 0;
 281     while (*cp)
 282     {
 283         c = strchr (cp, '+');
 284         if (!c)
 285             c = cp + strlen(cp);
 286         else if (c == cp)
 287         {
 288             cp++;
 289             continue;
 290         }
 291         /* cp ptr to first char of db name, c is char
 292            following db name */
 293         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 294         memcpy (databaseNames[no], cp, c-cp);
 295         databaseNames[no++][c-cp] = '\0';
 296         cp = c;
 297         if (*cp)
 298             cp++;
 299     }
 300     databaseNames[no] = NULL;
 301     *num = no;
 302     return databaseNames;
 303 }
 304
 305 ZOOM_API(ZOOM_connection)
 306 ZOOM_connection_new (const char *host, int portnum)
 307 {
 308     ZOOM_connection c = ZOOM_connection_create (0);
 309
 310     ZOOM_connection_connect (c, host, portnum);
 311     return c;
 312 }
 313
 314 ZOOM_API(void)
 315 ZOOM_connection_connect(ZOOM_connection c,
 316                         const char *host, int portnum)
 317 {
 318     const char *val;
 319     ZOOM_task task;
 320
 321     if (c->cs)
 322     {
 323         yaz_log (LOG_DEBUG, "reconnect");
 324         c->reconnect_ok = 1;
 325         return;
 326     }
 327     yaz_log(LOG_DEBUG, "connect");
 328     xfree (c->proxy);
 329     val = ZOOM_options_get (c->options, "proxy");
 330     if (val && *val)
 331         c->proxy = xstrdup (val);
 332     else
 333         c->proxy = 0;
 334
 335     xfree (c->charset);
 336     val = ZOOM_options_get (c->options, "charset");
 337     if (val && *val)
 338         c->charset = xstrdup (val);
 339     else
 340         c->charset = 0;
 341
 342     xfree (c->lang);
 343     val = ZOOM_options_get (c->options, "lang");
 344     if (val && *val)
 345         c->lang = xstrdup (val);
 346     else
 347         c->lang = 0;
 348
 349     xfree (c->host_port);
 350     if (portnum)
 351     {
 352         char hostn[128];
 353         sprintf (hostn, "%.80s:%d", host, portnum);
 354         c->host_port = xstrdup(hostn);
 355     }
 356     else
 357         c->host_port = xstrdup(host);
 358
 359     ZOOM_options_set(c->options, "host", c->host_port);
 360
 361     val = ZOOM_options_get (c->options, "cookie");
 362     if (val && *val)
 363         c->cookie_out = xstrdup (val);
 364
 365     val = ZOOM_options_get (c->options, "clientIP");
 366     if (val && *val)
 367         c->client_IP = xstrdup (val);
 368
 369     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 370
 371     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 372
 373     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 374
 375     if (!c->async)
 376     {
 377         while (ZOOM_event (1, &c))
 378             ;
 379     }
 380 }
 381
 382 ZOOM_API(ZOOM_query)
 383 ZOOM_query_create(void)
 384 {
 385     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 386
 387     s->refcount = 1;
 388     s->z_query = 0;
 389     s->sort_spec = 0;
 390     s->odr = odr_createmem (ODR_ENCODE);
 391
 392     return s;
 393 }
 394
 395 ZOOM_API(void)
 396 ZOOM_query_destroy(ZOOM_query s)
 397 {
 398     if (!s)
 399         return;
 400
 401     (s->refcount)--;
 402     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 403     if (s->refcount == 0)
 404     {
 405         odr_destroy (s->odr);
 406         xfree (s);
 407     }
 408 }
 409
 410 ZOOM_API(int)
 411 ZOOM_query_prefix(ZOOM_query s, const char *str)
 412 {
 413     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 414     s->z_query->which = Z_Query_type_1;
 415     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 416     if (!s->z_query->u.type_1)
 417         return -1;
 418     return 0;
 419 }
 420
 421 ZOOM_API(int)
 422 ZOOM_query_cql(ZOOM_query s, const char *str)
 423 {
 424     Z_External *ext;
 425
 426     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 427     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 428     ext->indirect_reference = 0;
 429     ext->descriptor = 0;
 430     ext->which = Z_External_CQL;
 431     ext->u.cql = odr_strdup(s->odr, str);
 432
 433     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 434     s->z_query->which = Z_Query_type_104;
 435     s->z_query->u.type_104 =  ext;
 436     return 0;
 437 }
 438
 439 ZOOM_API(int)
 440 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 441 {
 442     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 443     if (!s->sort_spec)
 444         return -1;
 445     return 0;
 446 }
 447
 448 static zoom_ret do_write(ZOOM_connection c);
 449
 450 ZOOM_API(void)
 451 ZOOM_connection_destroy(ZOOM_connection c)
 452 {
 453     ZOOM_resultset r;
 454     if (!c)
 455         return;
 456     if (c->cs)
 457         cs_close (c->cs);
 458     for (r = c->resultsets; r; r = r->next)
 459         r->connection = 0;
 460
 461     xfree (c->buf_in);
 462     xfree (c->addinfo);
 463     odr_destroy (c->odr_in);
 464     odr_destroy (c->odr_out);
 465     ZOOM_options_destroy (c->options);
 466     ZOOM_connection_remove_tasks (c);
 467     xfree (c->host_port);
 468     xfree (c->path);
 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
 645     if (c->host_port && c->proto == PROTO_SRW)
 646     {
 647         if (!c->cs)
 648         {
 649             yaz_log(LOG_DEBUG, "NO COMSTACK");
 650             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 651         }
 652         else
 653         {
 654             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 655             c->reconnect_ok = 1;
 656         }
 657     }
 658     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 659     task->u.retrieve.resultset = r;
 660     task->u.retrieve.start = start;
 661     task->u.retrieve.count = count;
 662
 663     cp = ZOOM_options_get (r->options, "schema");
 664     if (cp)
 665     {
 666         if (!r->schema || strcmp(r->schema, cp))
 667         {
 668             xfree(r->schema);
 669             r->schema = xstrdup(cp);
 670         }
 671     }
 672
 673     ZOOM_resultset_addref (r);
 674
 675     if (!r->connection->async || force_sync)
 676         while (r->connection && ZOOM_event (1, &r->connection))
 677             ;
 678 }
 679
 680 ZOOM_API(void)
 681 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 682                         size_t start, size_t count)
 683 {
 684     int force_present = 0;
 685
 686     if (!r)
 687         return ;
 688     if (count && recs)
 689         force_present = 1;
 690     ZOOM_resultset_retrieve (r, force_present, start, count);
 691     if (force_present)
 692     {
 693         size_t i;
 694         for (i = 0; i< count; i++)
 695             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 696     }
 697 }
 698
 699 static zoom_ret do_connect (ZOOM_connection c)
 700 {
 701     void *add;
 702     const char *effective_host;
 703
 704     if (c->proxy)
 705         effective_host = c->proxy;
 706     else
 707         effective_host = c->host_port;
 708
 709     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 710
 711     assert (!c->cs);
 712
 713     if (memcmp(c->host_port, "http:", 5) == 0)
 714     {
 715 #if HAVE_XML2
 716         const char *path;
 717         c->proto = PROTO_SRW;
 718         effective_host = c->host_port + 5;
 719         if (*effective_host == '/')
 720             effective_host++;
 721         if (*effective_host == '/')
 722             effective_host++;
 723         if (!(path = strchr(effective_host, '/')))
 724             path = "/";
 725         xfree(c->path);
 726         c->path = xstrdup(path);
 727 #else
 728         c->state = STATE_IDLE;
 729         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 730         return zoom_complete;
 731 #endif
 732     }
 733     c->cs = cs_create_host (effective_host, 0, &add);
 734
 735     if (c->cs)
 736     {
 737         int ret = cs_connect (c->cs, add);
 738         if (ret == 0)
 739         {
 740             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 741             ZOOM_connection_put_event(c, event);
 742             if (c->proto == PROTO_Z3950)
 743                 ZOOM_connection_send_init(c);
 744             else
 745             {
 746                 /* no init request for SRW .. */
 747                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 748                 ZOOM_connection_remove_task (c);
 749                 c->mask = 0;
 750                 ZOOM_connection_exec_task (c);
 751             }
 752             c->state = STATE_ESTABLISHED;
 753             return zoom_pending;
 754         }
 755         else if (ret > 0)
 756         {
 757             c->state = STATE_CONNECTING;
 758             c->mask = ZOOM_SELECT_EXCEPT;
 759             if (c->cs->io_pending & CS_WANT_WRITE)
 760                 c->mask += ZOOM_SELECT_WRITE;
 761             if (c->cs->io_pending & CS_WANT_READ)
 762                 c->mask += ZOOM_SELECT_READ;
 763             return zoom_pending;
 764         }
 765     }
 766     c->state = STATE_IDLE;
 767     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 768     return zoom_complete;
 769 }
 770
 771 int z3950_connection_socket(ZOOM_connection c)
 772 {
 773     if (c->cs)
 774         return cs_fileno(c->cs);
 775     return -1;
 776 }
 777
 778 int z3950_connection_mask(ZOOM_connection c)
 779 {
 780     if (c->cs)
 781         return c->mask;
 782     return 0;
 783 }
 784
 785 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 786 {
 787     int i;
 788     for (i = 0; i<200; i++)
 789     {
 790         size_t len;
 791         Z_OtherInformation **oi;
 792         char buf[80];
 793         const char *val;
 794         const char *cp;
 795         int oidval;
 796
 797         sprintf (buf, "otherInfo%d", i);
 798         val = ZOOM_options_get (c->options, buf);
 799         if (!val)
 800             break;
 801         cp = strchr (val, ':');
 802         if (!cp)
 803             continue;
 804         len = cp - val;
 805         if (len >= sizeof(buf))
 806             len = sizeof(buf)-1;
 807         memcpy (buf, val, len);
 808         buf[len] = '\0';
 809         oidval = oid_getvalbyname (buf);
 810         if (oidval == VAL_NONE)
 811             continue;
 812
 813         yaz_oi_APDU(a, &oi);
 814         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 815     }
 816 }
 817
 818 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 819 {
 820     assert (a);
 821     if (c->cookie_out)
 822     {
 823         Z_OtherInformation **oi;
 824         yaz_oi_APDU(a, &oi);
 825         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 826     }
 827     if (c->client_IP)
 828     {
 829         Z_OtherInformation **oi;
 830         yaz_oi_APDU(a, &oi);
 831         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 832     }
 833     otherInfo_attach (c, a, out);
 834     if (!z_APDU(out, &a, 0, 0))
 835     {
 836         FILE *outf = fopen("/tmp/apdu.txt", "a");
 837         if (a && outf)
 838         {
 839             ODR odr_pr = odr_createmem(ODR_PRINT);
 840             fprintf (outf, "a=%p\n", a);
 841             odr_setprint(odr_pr, outf);
 842             z_APDU(odr_pr, &a, 0, 0);
 843             odr_destroy(odr_pr);
 844         }
 845         yaz_log (LOG_DEBUG, "encoding failed");
 846         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 847         odr_reset(out);
 848         return -1;
 849     }
 850
 851     return 0;
 852 }
 853
 854 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 855 {
 856     ZOOM_Event event;
 857     assert (a);
 858     if (encode_APDU(c, a, c->odr_out))
 859         return zoom_complete;
 860     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 861     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 862     ZOOM_connection_put_event (c, event);
 863     odr_reset(c->odr_out);
 864     return do_write (c);
 865 }
 866
 867 /* returns 1 if PDU was sent OK (still pending )
 868            0 if PDU was not sent OK (nothing to wait for)
 869 */
 870
 871 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 872 {
 873     const char *impname;
 874     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 875     Z_InitRequest *ireq = apdu->u.initRequest;
 876     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 877         odr_malloc(c->odr_out, sizeof(*auth));
 878     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 879     const char *auth_userId = ZOOM_options_get (c->options, "user");
 880     const char *auth_password = ZOOM_options_get (c->options, "pass");
 881
 882     ODR_MASK_SET(ireq->options, Z_Options_search);
 883     ODR_MASK_SET(ireq->options, Z_Options_present);
 884     ODR_MASK_SET(ireq->options, Z_Options_scan);
 885     ODR_MASK_SET(ireq->options, Z_Options_sort);
 886     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 887     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 888
 889     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 890     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 891     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 892
 893     impname = ZOOM_options_get (c->options, "implementationName");
 894     ireq->implementationName =
 895         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 896     strcpy (ireq->implementationName, "");
 897     if (impname)
 898     {
 899         strcat (ireq->implementationName, impname);
 900         strcat (ireq->implementationName, "/");
 901     }
 902     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 903
 904     *ireq->maximumRecordSize =
 905         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 906     *ireq->preferredMessageSize =
 907         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 908
 909     if (auth_groupId || auth_password)
 910     {
 911         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 912         int i = 0;
 913         pass->groupId = 0;
 914         if (auth_groupId && *auth_groupId)
 915         {
 916             pass->groupId = (char *)
 917                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 918             strcpy(pass->groupId, auth_groupId);
 919             i++;
 920         }
 921         pass->userId = 0;
 922         if (auth_userId && *auth_userId)
 923         {
 924             pass->userId = (char *)
 925                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 926             strcpy(pass->userId, auth_userId);
 927             i++;
 928         }
 929         pass->password = 0;
 930         if (auth_password && *auth_password)
 931         {
 932             pass->password = (char *)
 933                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 934             strcpy(pass->password, auth_password);
 935             i++;
 936         }
 937         if (i)
 938         {
 939             auth->which = Z_IdAuthentication_idPass;
 940             auth->u.idPass = pass;
 941             ireq->idAuthentication = auth;
 942         }
 943     }
 944     else if (auth_userId)
 945     {
 946         auth->which = Z_IdAuthentication_open;
 947         auth->u.open = (char *)
 948             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 949         strcpy(auth->u.open, auth_userId);
 950         ireq->idAuthentication = auth;
 951     }
 952     if (c->proxy)
 953         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 954                                  VAL_PROXY, 1, c->host_port);
 955     if (c->charset||c->lang)
 956     {
 957         Z_OtherInformation **oi;
 958         Z_OtherInformationUnit *oi_unit;
 959
 960         yaz_oi_APDU(apdu, &oi);
 961
 962         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 963         {
 964             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 965
 966             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 967             oi_unit->information.externallyDefinedInfo =
 968                 yaz_set_proposal_charneg
 969                 (c->odr_out,
 970                  (const char **)&c->charset, (c->charset) ? 1:0,
 971                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 972         }
 973     }
 974     assert (apdu);
 975     return send_APDU (c, apdu);
 976 }
 977
 978 #if HAVE_XML2
 979 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_searchRetrieve *sr)
 980 {
 981     Z_SOAP_Handler h[2] = {
 982         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 983         {0, 0, 0}
 984     };
 985     ODR o = odr_createmem(ODR_ENCODE);
 986     int ret;
 987     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 988     Z_GDU *gdu;
 989     ZOOM_Event event;
 990
 991     gdu = z_get_HTTP_Request(c->odr_out);
 992     gdu->u.HTTP_Request->path = c->path;
 993     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 994                       "Content-Type", "text/xml");
 995     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 996                       "SOAPAction", "\"\"");
 997     p->which = Z_SOAP_generic;
 998     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
 999     p->u.generic->no = 0;
1000     p->u.generic->ns = 0;
1001     p->u.generic->p = sr;
1002     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1003
1004     ret = z_soap_codec(o, &p,
1005                        &gdu->u.HTTP_Request->content_buf,
1006                        &gdu->u.HTTP_Request->content_len, h);
1007
1008     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1009         return zoom_complete;
1010     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1011
1012     odr_destroy(o);
1013
1014     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1015     ZOOM_connection_put_event (c, event);
1016     odr_reset(c->odr_out);
1017     return do_write (c);
1018 }
1019 #endif
1020
1021 #if HAVE_XML2
1022 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1023 {
1024     int i;
1025     ZOOM_resultset resultset = 0;
1026     Z_SRW_searchRetrieve *sr = 0;
1027
1028     if (c->error)                  /* don't continue on error */
1029         return zoom_complete;
1030     assert (c->tasks);
1031     if (c->tasks->which == ZOOM_TASK_SEARCH)
1032     {
1033         resultset = c->tasks->u.search.resultset;
1034         resultset->setname = xstrdup ("default");
1035         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1036     }
1037     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1038     {
1039         resultset = c->tasks->u.retrieve.resultset;
1040
1041         resultset->start = c->tasks->u.retrieve.start;
1042         resultset->count = c->tasks->u.retrieve.count;
1043
1044         if (resultset->start >= resultset->size)
1045             return zoom_complete;
1046         if (resultset->start + resultset->count > resultset->size)
1047             resultset->count = resultset->size - resultset->start;
1048
1049         for (i = 0; i<resultset->count; i++)
1050         {
1051             ZOOM_record rec =
1052                 record_cache_lookup (resultset, i + resultset->start);
1053             if (!rec)
1054                 break;
1055         }
1056         if (i == resultset->count)
1057             return zoom_complete;
1058     }
1059     assert(resultset->z_query);
1060
1061     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1062
1063     if (resultset->z_query->which == Z_Query_type_104
1064         && resultset->z_query->u.type_104->which == Z_External_CQL)
1065         sr->u.request->query = resultset->z_query->u.type_104->u.cql;
1066     else if (resultset->z_query->which == Z_Query_type_1)
1067     {
1068         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, "Type-1");
1069         return zoom_complete;
1070     }
1071     else
1072     {
1073         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1074         return zoom_complete;
1075     }
1076     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1077     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1078     sr->u.request->recordSchema = resultset->schema;
1079
1080
1081     return send_srw(c, sr);
1082 }
1083 #else
1084 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1085 {
1086     return zoom_complete;
1087 }
1088 #endif
1089
1090 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1091 {
1092     ZOOM_resultset r;
1093     int lslb, ssub, mspn;
1094     const char *syntax;
1095     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1096     Z_SearchRequest *search_req = apdu->u.searchRequest;
1097     const char *elementSetName;
1098     const char *smallSetElementSetName;
1099     const char *mediumSetElementSetName;
1100
1101     assert (c->tasks);
1102     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1103
1104     r = c->tasks->u.search.resultset;
1105
1106     elementSetName =
1107         ZOOM_options_get (r->options, "elementSetName");
1108     smallSetElementSetName  =
1109         ZOOM_options_get (r->options, "smallSetElementSetName");
1110     mediumSetElementSetName =
1111         ZOOM_options_get (r->options, "mediumSetElementSetName");
1112
1113     if (!smallSetElementSetName)
1114         smallSetElementSetName = elementSetName;
1115
1116     if (!mediumSetElementSetName)
1117         mediumSetElementSetName = elementSetName;
1118
1119     assert (r);
1120     assert (r->z_query);
1121
1122     /* prepare query for the search request */
1123     search_req->query = r->z_query;
1124
1125     search_req->databaseNames =
1126         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1127
1128     /* get syntax (no need to provide unless piggyback is in effect) */
1129     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1130
1131     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1132     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1133     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1134     if (lslb != -1 && ssub != -1 && mspn != -1)
1135     {
1136         /* So're a Z39.50 expert? Let's hope you don't do sort */
1137         *search_req->largeSetLowerBound = lslb;
1138         *search_req->smallSetUpperBound = ssub;
1139         *search_req->mediumSetPresentNumber = mspn;
1140     }
1141     else if (r->start == 0 && r->count > 0
1142              && r->piggyback && !r->r_sort_spec && !r->schema)
1143     {
1144         /* Regular piggyback - do it unless we're going to do sort */
1145         *search_req->largeSetLowerBound = 2000000000;
1146         *search_req->smallSetUpperBound = 0;
1147         *search_req->mediumSetPresentNumber = r->count;
1148         smallSetElementSetName = 0;
1149     }
1150     else
1151     {
1152         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1153         smallSetElementSetName = 0;
1154         mediumSetElementSetName = 0;
1155         syntax = 0;
1156     }
1157     if (smallSetElementSetName && *smallSetElementSetName)
1158     {
1159         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1160             odr_malloc (c->odr_out, sizeof(*esn));
1161
1162         esn->which = Z_ElementSetNames_generic;
1163         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1164         search_req->smallSetElementSetNames = esn;
1165     }
1166     if (mediumSetElementSetName && *mediumSetElementSetName)
1167     {
1168         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1169             odr_malloc (c->odr_out, sizeof(*esn));
1170
1171         esn->which = Z_ElementSetNames_generic;
1172         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1173         search_req->mediumSetElementSetNames = esn;
1174     }
1175     if (syntax)
1176         search_req->preferredRecordSyntax =
1177             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1178
1179     if (!r->setname)
1180     {
1181         if (c->support_named_resultsets)
1182         {
1183             char setname[14];
1184             int ord;
1185             /* find the lowest unused ordinal so that we re-use
1186                result sets on the server. */
1187             for (ord = 1; ; ord++)
1188             {
1189                 ZOOM_resultset rp;
1190                 sprintf (setname, "%d", ord);
1191                 for (rp = c->resultsets; rp; rp = rp->next)
1192                     if (rp->setname && !strcmp (rp->setname, setname))
1193                         break;
1194                 if (!rp)
1195                     break;
1196             }
1197             r->setname = xstrdup (setname);
1198             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1199         }
1200         else
1201             r->setname = xstrdup ("default");
1202         ZOOM_options_set (r->options, "setname", r->setname);
1203     }
1204     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1205     /* send search request */
1206     return send_APDU (c, apdu);
1207 }
1208
1209 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1210 {
1211     int oclass;
1212     Z_DefaultDiagFormat *r;
1213     char *addinfo = 0;
1214
1215     xfree (c->addinfo);
1216     c->addinfo = 0;
1217     if (p->which != Z_DiagRec_defaultFormat)
1218     {
1219         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1220         return;
1221     }
1222     r = p->u.defaultFormat;
1223     switch (r->which)
1224     {
1225     case Z_DefaultDiagFormat_v2Addinfo:
1226         addinfo = r->u.v2Addinfo;
1227         break;
1228     case Z_DefaultDiagFormat_v3Addinfo:
1229         addinfo = r->u.v3Addinfo;
1230         break;
1231     }
1232     set_dset_error(c, *r->condition,
1233                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1234                    addinfo, 0);
1235 }
1236
1237 ZOOM_API(ZOOM_record)
1238 ZOOM_record_clone (ZOOM_record srec)
1239 {
1240     char *buf;
1241     int size;
1242     ODR odr_enc;
1243     ZOOM_record nrec;
1244
1245     odr_enc = odr_createmem(ODR_ENCODE);
1246     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1247         return 0;
1248     buf = odr_getbuf (odr_enc, &size, 0);
1249
1250     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1251     nrec->odr = odr_createmem(ODR_DECODE);
1252     nrec->wrbuf_marc = 0;
1253     odr_setbuf (nrec->odr, buf, size, 0);
1254     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1255
1256     odr_destroy (odr_enc);
1257     return nrec;
1258 }
1259
1260 ZOOM_API(ZOOM_record)
1261 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1262 {
1263     return record_cache_lookup (s, pos);
1264 }
1265
1266 ZOOM_API(ZOOM_record)
1267 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1268 {
1269     ZOOM_resultset_retrieve (r, 1, pos, 1);
1270     return ZOOM_resultset_record_immediate (r, pos);
1271 }
1272
1273 ZOOM_API(void)
1274 ZOOM_record_destroy (ZOOM_record rec)
1275 {
1276     if (!rec)
1277         return;
1278     if (rec->wrbuf_marc)
1279         wrbuf_free (rec->wrbuf_marc, 1);
1280     odr_destroy (rec->odr);
1281     xfree (rec);
1282 }
1283
1284 ZOOM_API(const char *)
1285 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1286 {
1287     Z_NamePlusRecord *npr;
1288
1289     if (len)
1290         *len = 0; /* default return */
1291
1292     if (!rec)
1293         return 0;
1294     npr = rec->npr;
1295     if (!npr)
1296         return 0;
1297     if (!strcmp (type, "database"))
1298     {
1299         if (len)
1300             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1301         return npr->databaseName;
1302     }
1303     else if (!strcmp (type, "syntax"))
1304     {
1305         const char *desc = 0;
1306         if (npr->which == Z_NamePlusRecord_databaseRecord)
1307         {
1308             Z_External *r = (Z_External *) npr->u.databaseRecord;
1309             oident *ent = oid_getentbyoid(r->direct_reference);
1310             if (ent)
1311                 desc = ent->desc;
1312         }
1313         if (!desc)
1314             desc = "none";
1315         if (len)
1316             *len = strlen(desc);
1317         return desc;
1318     }
1319     else if (!strcmp (type, "render") &&
1320              npr->which == Z_NamePlusRecord_databaseRecord)
1321     {
1322         Z_External *r = (Z_External *) npr->u.databaseRecord;
1323         oident *ent = oid_getentbyoid(r->direct_reference);
1324
1325         if (r->which == Z_External_sutrs)
1326         {
1327             if (len) *len = r->u.sutrs->len;
1328             return (const char *) r->u.sutrs->buf;
1329         }
1330         else if (r->which == Z_External_octet)
1331         {
1332             yaz_marc_t mt;
1333             switch (ent->value)
1334             {
1335             case VAL_SOIF:
1336             case VAL_HTML:
1337             case VAL_SUTRS:
1338                 break;
1339             case VAL_TEXT_XML:
1340             case VAL_APPLICATION_XML:
1341                 break;
1342             default:
1343                 if (!rec->wrbuf_marc)
1344                     rec->wrbuf_marc = wrbuf_alloc();
1345
1346                 mt = yaz_marc_create();
1347                 wrbuf_rewind (rec->wrbuf_marc);
1348                 if (yaz_marc_decode_wrbuf (
1349                         mt, (const char *) r->u.octet_aligned->buf,
1350                         r->u.octet_aligned->len,
1351                         rec->wrbuf_marc) > 0)
1352                 {
1353                     if (len)
1354                         *len = wrbuf_len(rec->wrbuf_marc);
1355                     yaz_marc_destroy(mt);
1356                     return wrbuf_buf(rec->wrbuf_marc);
1357                 }
1358                 yaz_marc_destroy(mt);
1359             }
1360             if (len)
1361                 *len = r->u.octet_aligned->len;
1362             return (const char *) r->u.octet_aligned->buf;
1363         }
1364         else if (r->which == Z_External_grs1)
1365         {
1366             if (!rec->wrbuf_marc)
1367                 rec->wrbuf_marc = wrbuf_alloc();
1368             wrbuf_rewind (rec->wrbuf_marc);
1369             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1370             if (len)
1371                 *len = wrbuf_len(rec->wrbuf_marc);
1372             return wrbuf_buf(rec->wrbuf_marc);
1373         }
1374         return 0;
1375     }
1376     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1377              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1378     {
1379         Z_External *r = (Z_External *) npr->u.databaseRecord;
1380         oident *ent = oid_getentbyoid(r->direct_reference);
1381
1382         if (r->which == Z_External_sutrs)
1383         {
1384             if (len) *len = r->u.sutrs->len;
1385             return (const char *) r->u.sutrs->buf;
1386         }
1387         else if (r->which == Z_External_octet)
1388         {
1389             yaz_marc_t mt;
1390             int marc_decode_type = YAZ_MARC_MARCXML;
1391
1392             if (!strcmp(type, "oai"))
1393                 marc_decode_type = YAZ_MARC_OAIMARC;
1394             switch (ent->value)
1395             {
1396             case VAL_SOIF:
1397             case VAL_HTML:
1398             case VAL_SUTRS:
1399                 break;
1400             case VAL_TEXT_XML:
1401             case VAL_APPLICATION_XML:
1402                 break;
1403             default:
1404                 if (!rec->wrbuf_marc)
1405                     rec->wrbuf_marc = wrbuf_alloc();
1406                 wrbuf_rewind (rec->wrbuf_marc);
1407                 mt = yaz_marc_create();
1408
1409                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1410                 if (yaz_marc_decode_wrbuf (
1411                         mt, (const char *) r->u.octet_aligned->buf,
1412                         r->u.octet_aligned->len,
1413                         rec->wrbuf_marc) > 0)
1414                 {
1415                     if (len)
1416                         *len = wrbuf_len(rec->wrbuf_marc);
1417                     yaz_marc_destroy(mt);
1418                     return wrbuf_buf(rec->wrbuf_marc);
1419                 }
1420                 yaz_marc_destroy(mt);
1421             }
1422             if (len) *len = r->u.octet_aligned->len;
1423             return (const char *) r->u.octet_aligned->buf;
1424         }
1425         else if (r->which == Z_External_grs1)
1426         {
1427             if (len) *len = 5;
1428             return "GRS-1";
1429         }
1430         return 0;
1431     }
1432     else if (!strcmp (type, "raw"))
1433     {
1434         if (npr->which == Z_NamePlusRecord_databaseRecord)
1435         {
1436             Z_External *r = (Z_External *) npr->u.databaseRecord;
1437
1438             if (r->which == Z_External_sutrs)
1439             {
1440                 if (len) *len = r->u.sutrs->len;
1441                 return (const char *) r->u.sutrs->buf;
1442             }
1443             else if (r->which == Z_External_octet)
1444             {
1445                 if (len) *len = r->u.octet_aligned->len;
1446                 return (const char *) r->u.octet_aligned->buf;
1447             }
1448             else /* grs-1, explain, ... */
1449             {
1450                 if (len) *len = -1;
1451                 return (const char *) npr->u.databaseRecord;
1452             }
1453         }
1454         return 0;
1455     }
1456     else if (!strcmp (type, "ext"))
1457     {
1458         if (npr->which == Z_NamePlusRecord_databaseRecord)
1459             return (const char *) npr->u.databaseRecord;
1460         return 0;
1461     }
1462     return 0;
1463 }
1464
1465 static int strcmp_null(const char *v1, const char *v2)
1466 {
1467     if (!v1 && !v2)
1468         return 0;
1469     if (!v1 || !v2)
1470         return -1;
1471     return strcmp(v1, v2);
1472 }
1473
1474 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1475                               int pos)
1476 {
1477     ZOOM_record_cache rc;
1478     const char *elementSetName =
1479         ZOOM_resultset_option_get (r, "elementSetName");
1480     const char *syntax =
1481         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1482
1483     for (rc = r->record_cache; rc; rc = rc->next)
1484     {
1485         if (pos == rc->pos)
1486         {
1487             if (strcmp_null(r->schema, rc->schema))
1488                 continue;
1489             if (strcmp_null(elementSetName,rc->elementSetName))
1490                 continue;
1491             if (strcmp_null(syntax, rc->syntax))
1492                 continue;
1493             /* not destroying rc->npr (it's handled by nmem )*/
1494             rc->rec.npr = npr;
1495             /* keeping wrbuf_marc too */
1496             return;
1497         }
1498     }
1499     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1500     rc->rec.npr = npr;
1501     rc->rec.odr = 0;
1502     rc->rec.wrbuf_marc = 0;
1503     if (elementSetName)
1504         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1505     else
1506         rc->elementSetName = 0;
1507
1508     if (syntax)
1509         rc->syntax = odr_strdup (r->odr, syntax);
1510     else
1511         rc->syntax = 0;
1512
1513     if (r->schema)
1514         rc->schema = odr_strdup (r->odr, r->schema);
1515     else
1516         rc->schema = 0;
1517
1518     rc->pos = pos;
1519     rc->next = r->record_cache;
1520     r->record_cache = rc;
1521 }
1522
1523 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1524 {
1525     ZOOM_record_cache rc;
1526     const char *elementSetName =
1527         ZOOM_resultset_option_get (r, "elementSetName");
1528     const char *syntax =
1529         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1530
1531     for (rc = r->record_cache; rc; rc = rc->next)
1532     {
1533         if (pos == rc->pos)
1534         {
1535             if (strcmp_null(r->schema, rc->schema))
1536                 continue;
1537             if (strcmp_null(elementSetName,rc->elementSetName))
1538                 continue;
1539             if (strcmp_null(syntax, rc->syntax))
1540                 continue;
1541             return &rc->rec;
1542         }
1543     }
1544     return 0;
1545 }
1546
1547 static void handle_records (ZOOM_connection c, Z_Records *sr,
1548                             int present_phase)
1549 {
1550     ZOOM_resultset resultset;
1551
1552     if (!c->tasks)
1553         return ;
1554     switch (c->tasks->which)
1555     {
1556     case ZOOM_TASK_SEARCH:
1557         resultset = c->tasks->u.search.resultset;
1558         break;
1559     case ZOOM_TASK_RETRIEVE:
1560         resultset = c->tasks->u.retrieve.resultset;
1561         break;
1562     default:
1563         return;
1564     }
1565     if (sr && sr->which == Z_Records_NSD)
1566     {
1567         Z_DiagRec dr, *dr_p = &dr;
1568         dr.which = Z_DiagRec_defaultFormat;
1569         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1570
1571         response_diag (c, dr_p);
1572     }
1573     else if (sr && sr->which == Z_Records_multipleNSD)
1574     {
1575         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1576             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1577         else
1578             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1579     }
1580     else
1581     {
1582         if (resultset->count + resultset->start > resultset->size)
1583             resultset->count = resultset->size - resultset->start;
1584         if (resultset->count < 0)
1585             resultset->count = 0;
1586         if (sr && sr->which == Z_Records_DBOSD)
1587         {
1588             int i;
1589             NMEM nmem = odr_extract_mem (c->odr_in);
1590             Z_NamePlusRecordList *p =
1591                 sr->u.databaseOrSurDiagnostics;
1592             for (i = 0; i<p->num_records; i++)
1593             {
1594                 record_cache_add (resultset, p->records[i],
1595                                   i+ resultset->start);
1596             }
1597             /* transfer our response to search_nmem .. we need it later */
1598             nmem_transfer (resultset->odr->mem, nmem);
1599             nmem_destroy (nmem);
1600             if (present_phase && p->num_records == 0)
1601             {
1602                 /* present response and we didn't get any records! */
1603                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1604             }
1605         }
1606         else if (present_phase)
1607         {
1608             /* present response and we didn't get any records! */
1609             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1610         }
1611     }
1612 }
1613
1614 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1615 {
1616     handle_records (c, pr->records, 1);
1617 }
1618
1619 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1620 {
1621     ZOOM_resultset resultset;
1622
1623     yaz_log (LOG_DEBUG, "got search response");
1624
1625     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1626         return ;
1627
1628     resultset = c->tasks->u.search.resultset;
1629
1630     resultset->size = *sr->resultCount;
1631     handle_records (c, sr->records, 0);
1632 }
1633
1634 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1635 {
1636     if (res->diagnostics && res->num_diagnostics > 0)
1637         response_diag (c, res->diagnostics[0]);
1638 }
1639
1640 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1641 {
1642     NMEM nmem = odr_extract_mem (c->odr_in);
1643     ZOOM_scanset scan;
1644
1645     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1646         return 0;
1647     scan = c->tasks->u.scan.scan;
1648
1649     if (res->entries && res->entries->nonsurrogateDiagnostics)
1650         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1651     scan->scan_response = res;
1652     nmem_transfer (scan->odr->mem, nmem);
1653     if (res->stepSize)
1654         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1655     if (res->positionOfTerm)
1656         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1657     if (res->scanStatus)
1658         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1659     if (res->numberOfEntriesReturned)
1660         ZOOM_options_set_int (scan->options, "number",
1661                               *res->numberOfEntriesReturned);
1662     nmem_destroy (nmem);
1663     return 1;
1664 }
1665
1666 static zoom_ret send_sort (ZOOM_connection c)
1667 {
1668     ZOOM_resultset  resultset;
1669
1670     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1671         return zoom_complete;
1672
1673     resultset = c->tasks->u.search.resultset;
1674
1675     if (c->error)
1676     {
1677         resultset->r_sort_spec = 0;
1678         return zoom_complete;
1679     }
1680     if (resultset->r_sort_spec)
1681     {
1682         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1683         Z_SortRequest *req = apdu->u.sortRequest;
1684
1685         req->num_inputResultSetNames = 1;
1686         req->inputResultSetNames = (Z_InternationalString **)
1687             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1688         req->inputResultSetNames[0] =
1689             odr_strdup (c->odr_out, resultset->setname);
1690         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1691         req->sortSequence = resultset->r_sort_spec;
1692         resultset->r_sort_spec = 0;
1693         return send_APDU (c, apdu);
1694     }
1695     return zoom_complete;
1696 }
1697
1698 static zoom_ret send_present (ZOOM_connection c)
1699 {
1700     Z_APDU *apdu = 0;
1701     Z_PresentRequest *req = 0;
1702     int i = 0;
1703     const char *syntax = 0;
1704     const char *elementSetName = 0;
1705     ZOOM_resultset  resultset;
1706
1707     if (!c->tasks)
1708         return zoom_complete;
1709
1710     switch (c->tasks->which)
1711     {
1712     case ZOOM_TASK_SEARCH:
1713         resultset = c->tasks->u.search.resultset;
1714         break;
1715     case ZOOM_TASK_RETRIEVE:
1716         resultset = c->tasks->u.retrieve.resultset;
1717         resultset->start = c->tasks->u.retrieve.start;
1718         resultset->count = c->tasks->u.retrieve.count;
1719
1720         if (resultset->start >= resultset->size)
1721             return zoom_complete;
1722         if (resultset->start + resultset->count > resultset->size)
1723             resultset->count = resultset->size - resultset->start;
1724         break;
1725     default:
1726         return zoom_complete;
1727     }
1728
1729     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1730     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1731
1732     if (c->error)                  /* don't continue on error */
1733         return zoom_complete;
1734     if (resultset->start < 0)
1735         return zoom_complete;
1736     for (i = 0; i<resultset->count; i++)
1737     {
1738         ZOOM_record rec =
1739             record_cache_lookup (resultset, i + resultset->start);
1740         if (!rec)
1741             break;
1742     }
1743     if (i == resultset->count)
1744         return zoom_complete;
1745
1746     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1747     req = apdu->u.presentRequest;
1748
1749     resultset->start += i;
1750     resultset->count -= i;
1751     *req->resultSetStartPoint = resultset->start + 1;
1752     *req->numberOfRecordsRequested = resultset->count;
1753     assert (*req->numberOfRecordsRequested > 0);
1754
1755     if (syntax && *syntax)
1756         req->preferredRecordSyntax =
1757             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1758
1759     if (resultset->schema && *resultset->schema)
1760     {
1761         Z_RecordComposition *compo = (Z_RecordComposition *)
1762             odr_malloc (c->odr_out, sizeof(*compo));
1763
1764         req->recordComposition = compo;
1765         compo->which = Z_RecordComp_complex;
1766         compo->u.complex = (Z_CompSpec *)
1767             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1768         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1769             odr_malloc(c->odr_out, sizeof(bool_t));
1770         *compo->u.complex->selectAlternativeSyntax = 0;
1771
1772         compo->u.complex->generic = (Z_Specification *)
1773             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1774
1775         compo->u.complex->generic->which = Z_Schema_oid;
1776         compo->u.complex->generic->schema.oid = (Odr_oid *)
1777             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1778
1779         if (!compo->u.complex->generic->schema.oid)
1780         {
1781             /* OID wasn't a schema! Try record syntax instead. */
1782
1783             compo->u.complex->generic->schema.oid = (Odr_oid *)
1784                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1785         }
1786         if (elementSetName && *elementSetName)
1787         {
1788             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1789                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1790             compo->u.complex->generic->elementSpec->which =
1791                 Z_ElementSpec_elementSetName;
1792             compo->u.complex->generic->elementSpec->u.elementSetName =
1793                 odr_strdup (c->odr_out, elementSetName);
1794         }
1795         else
1796             compo->u.complex->generic->elementSpec = 0;
1797         compo->u.complex->num_dbSpecific = 0;
1798         compo->u.complex->dbSpecific = 0;
1799         compo->u.complex->num_recordSyntax = 0;
1800         compo->u.complex->recordSyntax = 0;
1801     }
1802     else if (elementSetName && *elementSetName)
1803     {
1804         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1805             odr_malloc (c->odr_out, sizeof(*esn));
1806         Z_RecordComposition *compo = (Z_RecordComposition *)
1807             odr_malloc (c->odr_out, sizeof(*compo));
1808
1809         esn->which = Z_ElementSetNames_generic;
1810         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1811         compo->which = Z_RecordComp_simple;
1812         compo->u.simple = esn;
1813         req->recordComposition = compo;
1814     }
1815     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1816     return send_APDU (c, apdu);
1817 }
1818
1819 ZOOM_API(ZOOM_scanset)
1820 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1821 {
1822     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1823
1824     scan->connection = c;
1825     scan->odr = odr_createmem (ODR_DECODE);
1826     scan->options = ZOOM_options_create_with_parent (c->options);
1827     scan->refcount = 1;
1828     scan->scan_response = 0;
1829
1830     if ((scan->termListAndStartPoint =
1831          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1832                       start)))
1833     {
1834         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1835         task->u.scan.scan = scan;
1836
1837         (scan->refcount)++;
1838         if (!c->async)
1839         {
1840             while (ZOOM_event (1, &c))
1841                 ;
1842         }
1843     }
1844     return scan;
1845 }
1846
1847 ZOOM_API(void)
1848 ZOOM_scanset_destroy (ZOOM_scanset scan)
1849 {
1850     if (!scan)
1851         return;
1852     (scan->refcount)--;
1853     if (scan->refcount == 0)
1854     {
1855         odr_destroy (scan->odr);
1856
1857         ZOOM_options_destroy (scan->options);
1858         xfree (scan);
1859     }
1860 }
1861
1862 static zoom_ret send_package (ZOOM_connection c)
1863 {
1864     ZOOM_Event event;
1865     if (!c->tasks)
1866         return zoom_complete;
1867     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1868
1869     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1870     ZOOM_connection_put_event (c, event);
1871
1872     return do_write_ex (c, c->tasks->u.package->buf_out,
1873                         c->tasks->u.package->len_out);
1874 }
1875
1876 static zoom_ret send_scan (ZOOM_connection c)
1877 {
1878     ZOOM_scanset scan;
1879     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1880     Z_ScanRequest *req = apdu->u.scanRequest;
1881     if (!c->tasks)
1882         return zoom_complete;
1883     assert (c->tasks->which == ZOOM_TASK_SCAN);
1884     scan = c->tasks->u.scan.scan;
1885
1886     req->termListAndStartPoint = scan->termListAndStartPoint;
1887     req->attributeSet = scan->attributeSet;
1888
1889     *req->numberOfTermsRequested =
1890         ZOOM_options_get_int(scan->options, "number", 10);
1891
1892     req->preferredPositionInResponse =
1893         odr_intdup (c->odr_out,
1894                     ZOOM_options_get_int(scan->options, "position", 1));
1895
1896     req->stepSize =
1897         odr_intdup (c->odr_out,
1898                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1899
1900     req->databaseNames = set_DatabaseNames (c, scan->options,
1901                                             &req->num_databaseNames);
1902
1903     return send_APDU (c, apdu);
1904 }
1905
1906 ZOOM_API(size_t)
1907 ZOOM_scanset_size (ZOOM_scanset scan)
1908 {
1909     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1910         return 0;
1911     return scan->scan_response->entries->num_entries;
1912 }
1913
1914 ZOOM_API(const char *)
1915 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1916                                int *occ, int *len)
1917 {
1918     const char *term = 0;
1919     size_t noent = ZOOM_scanset_size (scan);
1920     Z_ScanResponse *res = scan->scan_response;
1921
1922     *len = 0;
1923     *occ = 0;
1924     if (pos >= noent)
1925         return 0;
1926     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1927     {
1928         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1929
1930         if (t->term->which == Z_Term_general)
1931         {
1932             term = (const char *) t->term->u.general->buf;
1933             *len = t->term->u.general->len;
1934         }
1935         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1936     }
1937     return term;
1938 }
1939
1940 ZOOM_API(const char *)
1941 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1942 {
1943     return ZOOM_options_get (scan->options, key);
1944 }
1945
1946 ZOOM_API(void)
1947 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1948                               const char *val)
1949 {
1950     ZOOM_options_set (scan->options, key, val);
1951 }
1952
1953 static Z_APDU *create_es_package (ZOOM_package p, int type)
1954 {
1955     const char *str;
1956     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1957     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1958
1959     *req->function = Z_ExtendedServicesRequest_create;
1960
1961     str = ZOOM_options_get(p->options, "package-name");
1962     if (str && *str)
1963         req->packageName = nmem_strdup (p->odr_out->mem, str);
1964
1965     str = ZOOM_options_get(p->options, "user-id");
1966     if (str)
1967         req->userId = nmem_strdup (p->odr_out->mem, str);
1968
1969     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1970                                               type);
1971
1972     str = ZOOM_options_get(p->options, "function");
1973     if (str)
1974     {
1975         if (!strcmp (str, "create"))
1976             *req->function = 1;
1977         if (!strcmp (str, "delete"))
1978             *req->function = 2;
1979         if (!strcmp (str, "modify"))
1980             *req->function = 3;
1981     }
1982     return apdu;
1983 }
1984
1985 static const char *ill_array_lookup (void *clientData, const char *idx)
1986 {
1987     ZOOM_package p = (ZOOM_package) clientData;
1988     return ZOOM_options_get (p->options, idx+4);
1989 }
1990
1991 static Z_External *encode_ill_request (ZOOM_package p)
1992 {
1993     ODR out = p->odr_out;
1994     ILL_Request *req;
1995     Z_External *r = 0;
1996     struct ill_get_ctl ctl;
1997
1998     ctl.odr = p->odr_out;
1999     ctl.clientData = p;
2000     ctl.f = ill_array_lookup;
2001
2002     req = ill_get_ILLRequest(&ctl, "ill", 0);
2003
2004     if (!ill_Request (out, &req, 0, 0))
2005     {
2006         int ill_request_size;
2007         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2008         if (ill_request_buf)
2009             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2010         return 0;
2011     }
2012     else
2013     {
2014         oident oid;
2015         int illRequest_size = 0;
2016         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2017
2018         oid.proto = PROTO_GENERAL;
2019         oid.oclass = CLASS_GENERAL;
2020         oid.value = VAL_ISO_ILL_1;
2021
2022         r = (Z_External *) odr_malloc (out, sizeof(*r));
2023         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2024         r->indirect_reference = 0;
2025         r->descriptor = 0;
2026         r->which = Z_External_single;
2027
2028         r->u.single_ASN1_type = (Odr_oct *)
2029             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2030         r->u.single_ASN1_type->buf = (unsigned char*)
2031             odr_malloc (out, illRequest_size);
2032         r->u.single_ASN1_type->len = illRequest_size;
2033         r->u.single_ASN1_type->size = illRequest_size;
2034         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2035     }
2036     return r;
2037 }
2038
2039 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2040 {
2041     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2042     const char *str;
2043
2044     req->which=Z_IOItemOrder_esRequest;
2045     req->u.esRequest = (Z_IORequest *)
2046         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2047
2048     /* to keep part ... */
2049     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2050         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2051     req->u.esRequest->toKeep->supplDescription = 0;
2052     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2053         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2054
2055     str = ZOOM_options_get(p->options, "contact-name");
2056     req->u.esRequest->toKeep->contact->name = str ?
2057         nmem_strdup (p->odr_out->mem, str) : 0;
2058
2059     str = ZOOM_options_get(p->options, "contact-phone");
2060     req->u.esRequest->toKeep->contact->phone = str ?
2061         nmem_strdup (p->odr_out->mem, str) : 0;
2062
2063     str = ZOOM_options_get(p->options, "contact-email");
2064     req->u.esRequest->toKeep->contact->email = str ?
2065         nmem_strdup (p->odr_out->mem, str) : 0;
2066
2067     req->u.esRequest->toKeep->addlBilling = 0;
2068
2069     /* not to keep part ... */
2070     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2071         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2072
2073     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2074         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2075
2076     str = ZOOM_options_get(p->options, "itemorder-setname");
2077     if (!str)
2078         str = "default";
2079     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2080         nmem_strdup (p->odr_out->mem, str);
2081     req->u.esRequest->notToKeep->resultSetItem->item =
2082         (int *) odr_malloc(p->odr_out, sizeof(int));
2083
2084     str = ZOOM_options_get(p->options, "itemorder-item");
2085     *req->u.esRequest->notToKeep->resultSetItem->item =
2086         (str ? atoi(str) : 1);
2087
2088     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2089
2090     return req;
2091 }
2092
2093 ZOOM_API(void)
2094     ZOOM_package_send (ZOOM_package p, const char *type)
2095 {
2096     Z_APDU *apdu = 0;
2097     ZOOM_connection c;
2098     if (!p)
2099         return;
2100     c = p->connection;
2101     odr_reset (p->odr_out);
2102     xfree (p->buf_out);
2103     p->buf_out = 0;
2104     if (!strcmp(type, "itemorder"))
2105     {
2106         Z_External *r;
2107         apdu = create_es_package (p, VAL_ITEMORDER);
2108         if (apdu)
2109         {
2110             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2111
2112             r->direct_reference =
2113                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2114                                        VAL_ITEMORDER);
2115             r->descriptor = 0;
2116             r->which = Z_External_itemOrder;
2117             r->indirect_reference = 0;
2118             r->u.itemOrder = encode_item_order (p);
2119
2120             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2121         }
2122     }
2123     if (apdu)
2124     {
2125         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2126         {
2127             char *buf;
2128
2129             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2130             task->u.package = p;
2131             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2132             p->buf_out = (char *) xmalloc (p->len_out);
2133             memcpy (p->buf_out, buf, p->len_out);
2134
2135             (p->refcount)++;
2136             if (!c->async)
2137             {
2138                 while (ZOOM_event (1, &c))
2139                     ;
2140             }
2141         }
2142     }
2143 }
2144
2145 ZOOM_API(ZOOM_package)
2146     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2147 {
2148     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2149
2150     p->connection = c;
2151     p->odr_out = odr_createmem (ODR_ENCODE);
2152     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2153     p->refcount = 1;
2154     p->buf_out = 0;
2155     p->len_out = 0;
2156     return p;
2157 }
2158
2159 ZOOM_API(void)
2160     ZOOM_package_destroy(ZOOM_package p)
2161 {
2162     if (!p)
2163         return;
2164     (p->refcount)--;
2165     if (p->refcount == 0)
2166     {
2167         odr_destroy (p->odr_out);
2168         xfree (p->buf_out);
2169
2170         ZOOM_options_destroy (p->options);
2171         xfree (p);
2172     }
2173 }
2174
2175 ZOOM_API(const char *)
2176 ZOOM_package_option_get (ZOOM_package p, const char *key)
2177 {
2178     return ZOOM_options_get (p->options, key);
2179 }
2180
2181
2182 ZOOM_API(void)
2183 ZOOM_package_option_set (ZOOM_package p, const char *key,
2184                               const char *val)
2185 {
2186     ZOOM_options_set (p->options, key, val);
2187 }
2188
2189 static int ZOOM_connection_exec_task (ZOOM_connection c)
2190 {
2191     ZOOM_task task = c->tasks;
2192     zoom_ret ret = zoom_complete;
2193
2194     if (!task)
2195     {
2196         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2197         return 0;
2198     }
2199     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2200              task->which, task->running);
2201     if (c->error != ZOOM_ERROR_NONE)
2202     {
2203         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2204         ZOOM_connection_remove_tasks (c);
2205         return 0;
2206     }
2207     if (task->running)
2208     {
2209         yaz_log (LOG_DEBUG, "task already running");
2210         return 0;
2211     }
2212     task->running = 1;
2213     ret = zoom_complete;
2214     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2215     {
2216         switch (task->which)
2217         {
2218         case ZOOM_TASK_SEARCH:
2219             if (c->proto == PROTO_SRW)
2220                 ret = ZOOM_connection_srw_send_search(c);
2221             else
2222                 ret = ZOOM_connection_send_search(c);
2223             break;
2224         case ZOOM_TASK_RETRIEVE:
2225             if (c->proto == PROTO_SRW)
2226                 ret = ZOOM_connection_srw_send_search(c);
2227             else
2228                 ret = send_present (c);
2229             break;
2230         case ZOOM_TASK_CONNECT:
2231             ret = do_connect(c);
2232             break;
2233         case ZOOM_TASK_SCAN:
2234             ret = send_scan(c);
2235             break;
2236         case ZOOM_TASK_PACKAGE:
2237             ret = send_package(c);
2238             break;
2239         }
2240     }
2241     else
2242     {
2243         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2244         ZOOM_connection_remove_tasks (c);
2245     }
2246     if (ret == zoom_complete)
2247     {
2248         yaz_log (LOG_DEBUG, "task removed (complete)");
2249         ZOOM_connection_remove_task (c);
2250         return 0;
2251     }
2252     yaz_log (LOG_DEBUG, "task pending");
2253     return 1;
2254 }
2255
2256 static zoom_ret send_sort_present (ZOOM_connection c)
2257 {
2258     zoom_ret r = send_sort (c);
2259     if (r == zoom_complete)
2260         r = send_present (c);
2261     return r;
2262 }
2263
2264 static int es_response (ZOOM_connection c,
2265                         Z_ExtendedServicesResponse *res)
2266 {
2267     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2268         return 0;
2269     if (res->diagnostics && res->num_diagnostics > 0)
2270         response_diag(c, res->diagnostics[0]);
2271     if (res->taskPackage &&
2272         res->taskPackage->which == Z_External_extendedService)
2273     {
2274         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2275         Odr_oct *id = taskPackage->targetReference;
2276
2277         if (id)
2278             ZOOM_options_setl (c->tasks->u.package->options,
2279                                "targetReference", (char*) id->buf, id->len);
2280     }
2281     return 1;
2282 }
2283
2284
2285 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2286 {
2287     Z_InitResponse *initrs;
2288
2289     c->mask = 0;
2290     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2291     switch(apdu->which)
2292     {
2293     case Z_APDU_initResponse:
2294         initrs = apdu->u.initResponse;
2295         ZOOM_connection_option_set(c, "targetImplementationId",
2296                                    initrs->implementationId ?
2297                                    initrs->implementationId : "");
2298         ZOOM_connection_option_set(c, "targetImplementationName",
2299                                    initrs->implementationName ?
2300                                    initrs->implementationName : "");
2301         ZOOM_connection_option_set(c, "targetImplementationVersion",
2302                                    initrs->implementationVersion ?
2303                                    initrs->implementationVersion : "");
2304         if (!*initrs->result)
2305         {
2306             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2307         }
2308         else
2309         {
2310             char *cookie =
2311                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2312                                           VAL_COOKIE, 1, 0);
2313             xfree (c->cookie_in);
2314             c->cookie_in = 0;
2315             if (cookie)
2316                 c->cookie_in = xstrdup(cookie);
2317             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2318                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2319                 c->support_named_resultsets = 1;
2320             if (c->tasks)
2321             {
2322                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2323                 ZOOM_connection_remove_task (c);
2324             }
2325             ZOOM_connection_exec_task (c);
2326         }
2327         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2328         {
2329             NMEM tmpmem = nmem_create();
2330             Z_CharSetandLanguageNegotiation *p =
2331                 yaz_get_charneg_record(initrs->otherInfo);
2332
2333             if (p)
2334             {
2335                 char *charset=NULL, *lang=NULL;
2336                 int sel;
2337
2338                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2339                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2340                         "language %s, select %d",
2341                         charset ? charset : "none", lang ? lang : "none", sel);
2342                 if (charset)
2343                     ZOOM_connection_option_set (c, "negotiation-charset",
2344                                                 charset);
2345                 if (lang)
2346                     ZOOM_connection_option_set (c, "negotiation-lang",
2347                                                 lang);
2348                 nmem_destroy(tmpmem);
2349             }
2350         }
2351         break;
2352     case Z_APDU_searchResponse:
2353         handle_search_response (c, apdu->u.searchResponse);
2354         if (send_sort_present (c) == zoom_complete)
2355             ZOOM_connection_remove_task (c);
2356         break;
2357     case Z_APDU_presentResponse:
2358         handle_present_response (c, apdu->u.presentResponse);
2359         if (send_present (c) == zoom_complete)
2360             ZOOM_connection_remove_task (c);
2361         break;
2362     case Z_APDU_sortResponse:
2363         sort_response (c, apdu->u.sortResponse);
2364         if (send_present (c) == zoom_complete)
2365             ZOOM_connection_remove_task (c);
2366         break;
2367     case Z_APDU_scanResponse:
2368         scan_response (c, apdu->u.scanResponse);
2369         ZOOM_connection_remove_task (c);
2370         break;
2371     case Z_APDU_extendedServicesResponse:
2372         es_response (c, apdu->u.extendedServicesResponse);
2373         ZOOM_connection_remove_task (c);
2374         break;
2375     case Z_APDU_close:
2376         if (c->reconnect_ok)
2377         {
2378             do_close(c);
2379             c->tasks->running = 0;
2380             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2381         }
2382         else
2383         {
2384             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2385             do_close(c);
2386         }
2387         break;
2388     default:
2389         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2390         do_close(c);
2391     }
2392 }
2393
2394 #if HAVE_XML2
2395 static void handle_srw_response(ZOOM_connection c,
2396                                 Z_SRW_searchRetrieveResponse *res)
2397 {
2398     ZOOM_resultset resultset = 0;
2399     int i;
2400     NMEM nmem;
2401
2402     if (!c->tasks)
2403         return;
2404
2405     if (c->tasks->which == ZOOM_TASK_SEARCH)
2406         resultset = c->tasks->u.search.resultset;
2407     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2408         resultset = c->tasks->u.retrieve.resultset;
2409     else
2410         return ;
2411
2412     resultset->size = 0;
2413
2414     yaz_log(LOG_LOG, "got SRW response OK");
2415
2416     if (res->numberOfRecords)
2417         resultset->size = *res->numberOfRecords;
2418
2419     for (i = 0; i<res->num_records; i++)
2420     {
2421         int pos;
2422
2423         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2424             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2425
2426         if (res->records[i].recordPosition &&
2427             *res->records[i].recordPosition > 0)
2428             pos = *res->records[i].recordPosition - 1;
2429         else
2430             pos = resultset->start + i;
2431
2432         npr->databaseName = 0;
2433         npr->which = Z_NamePlusRecord_databaseRecord;
2434         npr->u.databaseRecord = (Z_External *)
2435             odr_malloc(c->odr_in, sizeof(Z_External));
2436         npr->u.databaseRecord->descriptor = 0;
2437         npr->u.databaseRecord->direct_reference =
2438             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2439         npr->u.databaseRecord->which = Z_External_octet;
2440         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2441             odr_malloc(c->odr_in, sizeof(Odr_oct));
2442         npr->u.databaseRecord->u.octet_aligned->buf =
2443             res->records[i].recordData_buf;
2444         npr->u.databaseRecord->u.octet_aligned->len =
2445             npr->u.databaseRecord->u.octet_aligned->size =
2446             res->records[i].recordData_len;
2447         record_cache_add (resultset, npr, pos);
2448         yaz_log(LOG_LOG, "add SRW record to cache to pos %d", pos);
2449     }
2450     if (res->num_diagnostics > 0)
2451     {
2452         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2453                        res->diagnostics[0].details, 0);
2454     }
2455     nmem = odr_extract_mem(c->odr_in);
2456     nmem_transfer(resultset->odr->mem, nmem);
2457     nmem_destroy(nmem);
2458 }
2459 #endif
2460
2461 #if HAVE_XML2
2462 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2463 {
2464     int ret = -1;
2465     const char *content_type = z_HTTP_header_lookup(hres->headers,
2466                                                     "Content-Type");
2467     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2468                                                        "Connection");
2469     c->mask = 0;
2470     yaz_log (LOG_DEBUG, "handle_http");
2471
2472     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2473     {
2474         Z_SOAP *soap_package = 0;
2475         ODR o = odr_createmem(ODR_DECODE);
2476         Z_SOAP_Handler soap_handlers[2] = {
2477             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2478              (Z_SOAP_fun) yaz_srw_codec},
2479             {0, 0, 0}
2480         };
2481         ret = z_soap_codec(o, &soap_package,
2482                            &hres->content_buf, &hres->content_len,
2483                            soap_handlers);
2484         if (!ret && soap_package->which == Z_SOAP_generic &&
2485             soap_package->u.generic->no == 0)
2486         {
2487             Z_SRW_searchRetrieve *sr = soap_package->u.generic->p;
2488             if (sr->which == Z_SRW_searchRetrieve_response)
2489                 handle_srw_response(c, sr->u.response);
2490             else
2491                 ret = -1;
2492         }
2493         else if (!ret && (soap_package->which == Z_SOAP_fault
2494                           || soap_package->which == Z_SOAP_error))
2495         {
2496             set_HTTP_error(c, hres->code,
2497                            soap_package->u.fault->fault_code,
2498                            soap_package->u.fault->fault_string);
2499         }
2500         else
2501             ret = -1;
2502         odr_destroy(o);
2503     }
2504     if (ret)
2505     {
2506         if (hres->code != 200)
2507             set_HTTP_error(c, hres->code, 0, 0);
2508         else
2509             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2510         do_close (c);
2511     }
2512     ZOOM_connection_remove_task(c);
2513     if (!strcmp(hres->version, "1.0"))
2514     {
2515         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2516         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2517             do_close(c);
2518     }
2519     else
2520     {
2521         /* HTTP 1.1: only if no close we stay alive .. */
2522         if (connection_head && !strcmp(connection_head, "close"))
2523             do_close(c);
2524     }
2525 }
2526 #endif
2527
2528 static int do_read (ZOOM_connection c)
2529 {
2530     int r;
2531     ZOOM_Event event;
2532
2533     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2534     ZOOM_connection_put_event (c, event);
2535
2536     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2537
2538     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2539     if (r == 1)
2540         return 0;
2541     if (r <= 0)
2542     {
2543         if (c->reconnect_ok)
2544         {
2545             do_close (c);
2546             c->reconnect_ok = 0;
2547             yaz_log (LOG_DEBUG, "reconnect read");
2548             c->tasks->running = 0;
2549             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2550         }
2551         else
2552         {
2553             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2554             do_close (c);
2555         }
2556     }
2557     else
2558     {
2559         Z_GDU *gdu;
2560         ZOOM_Event event;
2561         odr_reset (c->odr_in);
2562         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2563         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2564         ZOOM_connection_put_event (c, event);
2565
2566         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2567         {
2568             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2569             do_close (c);
2570         }
2571         else if (gdu->which == Z_GDU_Z3950)
2572             handle_apdu (c, gdu->u.z3950);
2573         else if (gdu->which == Z_GDU_HTTP_Response)
2574         {
2575 #if HAVE_XML2
2576             handle_http (c, gdu->u.HTTP_Response);
2577 #else
2578             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2579             do_close (c);
2580 #endif
2581         }
2582         c->reconnect_ok = 0;
2583     }
2584     return 1;
2585 }
2586
2587 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2588 {
2589     int r;
2590     ZOOM_Event event;
2591
2592     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2593     ZOOM_connection_put_event (c, event);
2594
2595     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2596     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2597     {
2598         if (c->reconnect_ok)
2599         {
2600             do_close (c);
2601             c->reconnect_ok = 0;
2602             yaz_log (LOG_DEBUG, "reconnect write");
2603             c->tasks->running = 0;
2604             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2605             return zoom_pending;
2606         }
2607         if (c->state == STATE_CONNECTING)
2608             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2609         else
2610             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2611         do_close (c);
2612         return zoom_complete;
2613     }
2614     else if (r == 1)
2615     {
2616         c->mask = ZOOM_SELECT_EXCEPT;
2617         if (c->cs->io_pending & CS_WANT_WRITE)
2618             c->mask += ZOOM_SELECT_WRITE;
2619         if (c->cs->io_pending & CS_WANT_READ)
2620             c->mask += ZOOM_SELECT_READ;
2621         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2622     }
2623     else
2624     {
2625         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2626         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2627     }
2628     return zoom_pending;
2629 }
2630
2631 static zoom_ret do_write(ZOOM_connection c)
2632 {
2633     return do_write_ex (c, c->buf_out, c->len_out);
2634 }
2635
2636
2637 ZOOM_API(const char *)
2638 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2639 {
2640     return ZOOM_options_get (c->options, key);
2641 }
2642
2643 ZOOM_API(void)
2644 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2645                                   const char *val)
2646 {
2647     ZOOM_options_set (c->options, key, val);
2648 }
2649
2650 ZOOM_API(const char *)
2651 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2652 {
2653     return ZOOM_options_get (r->options, key);
2654 }
2655
2656 ZOOM_API(void)
2657 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2658                                   const char *val)
2659 {
2660     ZOOM_options_set (r->options, key, val);
2661 }
2662
2663
2664 ZOOM_API(int)
2665 ZOOM_connection_errcode (ZOOM_connection c)
2666 {
2667     return ZOOM_connection_error (c, 0, 0);
2668 }
2669
2670 ZOOM_API(const char *)
2671 ZOOM_connection_errmsg (ZOOM_connection c)
2672 {
2673     const char *msg;
2674     ZOOM_connection_error (c, &msg, 0);
2675     return msg;
2676 }
2677
2678 ZOOM_API(const char *)
2679 ZOOM_connection_addinfo (ZOOM_connection c)
2680 {
2681     const char *addinfo;
2682     ZOOM_connection_error (c, 0, &addinfo);
2683     return addinfo;
2684 }
2685
2686 ZOOM_API(const char *)
2687 ZOOM_diag_str (int error)
2688 {
2689     switch (error)
2690     {
2691     case ZOOM_ERROR_NONE:
2692         return "No error";
2693     case ZOOM_ERROR_CONNECT:
2694         return "Connect failed";
2695     case ZOOM_ERROR_MEMORY:
2696         return "Out of memory";
2697     case ZOOM_ERROR_ENCODE:
2698         return "Encoding failed";
2699     case ZOOM_ERROR_DECODE:
2700         return "Decoding failed";
2701     case ZOOM_ERROR_CONNECTION_LOST:
2702         return "Connection lost";
2703     case ZOOM_ERROR_INIT:
2704         return "Init rejected";
2705     case ZOOM_ERROR_INTERNAL:
2706         return "Internal failure";
2707     case ZOOM_ERROR_TIMEOUT:
2708         return "Timeout";
2709     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2710         return "Unsupported protocol";
2711     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2712         return "Unsupported query type";
2713     default:
2714         return diagbib1_str (error);
2715     }
2716 }
2717
2718 ZOOM_API(int)
2719 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2720                          const char **addinfo, const char **diagset)
2721 {
2722     int error = c->error;
2723     if (cp)
2724     {
2725         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2726             *cp = ZOOM_diag_str(error);
2727         else if (!strcmp(c->diagset, "HTTP"))
2728             *cp = z_HTTP_errmsg(c->error);
2729         else if (!strcmp(c->diagset, "Bib-1"))
2730             *cp = ZOOM_diag_str(error);
2731         else if (!strcmp(c->diagset, "SRW"))
2732             *cp = yaz_srw_error_str(c->error);
2733         else
2734             *cp = "Unknown error and diagnostic set";
2735     }
2736     if (addinfo)
2737         *addinfo = c->addinfo ? c->addinfo : "";
2738     if (diagset)
2739         *diagset = c->diagset ? c->diagset : "";
2740     return c->error;
2741 }
2742
2743 ZOOM_API(int)
2744 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2745                        const char **addinfo)
2746 {
2747     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2748 }
2749
2750 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2751 {
2752     ZOOM_Event event = 0;
2753     int r = cs_look(c->cs);
2754     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2755              c, mask, r);
2756
2757     if (r == CS_NONE)
2758     {
2759         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2760         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2761         do_close (c);
2762         ZOOM_connection_put_event (c, event);
2763     }
2764     else if (r == CS_CONNECT)
2765     {
2766         int ret;
2767         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2768
2769         ret = cs_rcvconnect (c->cs);
2770         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2771         if (ret == 1)
2772         {
2773             c->mask = ZOOM_SELECT_EXCEPT;
2774             if (c->cs->io_pending & CS_WANT_WRITE)
2775                 c->mask += ZOOM_SELECT_WRITE;
2776             if (c->cs->io_pending & CS_WANT_READ)
2777                 c->mask += ZOOM_SELECT_READ;
2778             ZOOM_connection_put_event (c, event);
2779         }
2780         else if (ret == 0)
2781         {
2782             ZOOM_connection_put_event (c, event);
2783             if (c->proto == PROTO_Z3950)
2784                 ZOOM_connection_send_init(c);
2785             else
2786             {
2787                 /* no init request for SRW .. */
2788                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2789                 ZOOM_connection_remove_task (c);
2790                 c->mask = 0;
2791                 ZOOM_connection_exec_task (c);
2792             }
2793             c->state = STATE_ESTABLISHED;
2794         }
2795         else
2796         {
2797             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2798             do_close (c);
2799             ZOOM_connection_put_event (c, event);
2800         }
2801     }
2802     else
2803     {
2804         if (mask & ZOOM_SELECT_READ)
2805             do_read (c);
2806         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2807             do_write (c);
2808     }
2809     return 1;
2810 }
2811
2812 ZOOM_API(int)
2813 ZOOM_connection_last_event(ZOOM_connection cs)
2814 {
2815     if (!cs)
2816         return ZOOM_EVENT_NONE;
2817     return cs->last_event;
2818 }
2819
2820 ZOOM_API(int)
2821 ZOOM_event (int no, ZOOM_connection *cs)
2822 {
2823     int timeout = 5000;
2824 #if HAVE_SYS_POLL_H
2825     struct pollfd pollfds[1024];
2826     ZOOM_connection poll_cs[1024];
2827 #else
2828     struct timeval tv;
2829     fd_set input, output, except;
2830 #endif
2831     int i, r, nfds;
2832     int max_fd = 0;
2833
2834     for (i = 0; i<no; i++)
2835     {
2836         ZOOM_connection c = cs[i];
2837         ZOOM_Event event;
2838         if (c && (event = ZOOM_connection_get_event(c)))
2839         {
2840             ZOOM_Event_destroy (event);
2841             return i+1;
2842         }
2843     }
2844     for (i = 0; i<no; i++)
2845     {
2846         ZOOM_connection c = cs[i];
2847         ZOOM_Event event;
2848         if (c && ZOOM_connection_exec_task (c))
2849         {
2850             if ((event = ZOOM_connection_get_event(c)))
2851             {
2852                 ZOOM_Event_destroy (event);
2853                 return i+1;
2854             }
2855         }
2856     }
2857 #if HAVE_SYS_POLL_H
2858
2859 #else
2860     FD_ZERO (&input);
2861     FD_ZERO (&output);
2862     FD_ZERO (&except);
2863 #endif
2864     nfds = 0;
2865     for (i = 0; i<no; i++)
2866     {
2867         ZOOM_connection c = cs[i];
2868         int fd, mask;
2869         int this_timeout;
2870
2871         if (!c)
2872             continue;
2873         fd = z3950_connection_socket(c);
2874         mask = z3950_connection_mask(c);
2875
2876         if (fd == -1)
2877             continue;
2878         if (max_fd < fd)
2879             max_fd = fd;
2880
2881         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2882         if (this_timeout != -1 && this_timeout < timeout)
2883             timeout = this_timeout;
2884 #if HAVE_SYS_POLL_H
2885         if (mask)
2886         {
2887             short poll_events = 0;
2888
2889             if (mask & ZOOM_SELECT_READ)
2890                 poll_events += POLLIN;
2891             if (mask & ZOOM_SELECT_WRITE)
2892                 poll_events += POLLOUT;
2893             if (mask & ZOOM_SELECT_EXCEPT)
2894                 poll_events += POLLERR;
2895             pollfds[nfds].fd = fd;
2896             pollfds[nfds].events = poll_events;
2897             pollfds[nfds].revents = 0;
2898             poll_cs[nfds] = c;
2899             nfds++;
2900         }
2901 #else
2902         if (mask & ZOOM_SELECT_READ)
2903         {
2904             FD_SET (fd, &input);
2905             nfds++;
2906         }
2907         if (mask & ZOOM_SELECT_WRITE)
2908         {
2909             FD_SET (fd, &output);
2910             nfds++;
2911         }
2912         if (mask & ZOOM_SELECT_EXCEPT)
2913         {
2914             FD_SET (fd, &except);
2915             nfds++;
2916         }
2917 #endif
2918     }
2919     if (timeout >= 5000)
2920         timeout = 30;
2921
2922     if (!nfds)
2923         return 0;
2924
2925 #if HAVE_SYS_POLL_H
2926     r = poll (pollfds, nfds, timeout * 1000);
2927     for (i = 0; i<nfds; i++)
2928     {
2929         ZOOM_connection c = poll_cs[i];
2930         if (r && c->mask)
2931         {
2932             int mask = 0;
2933             if (pollfds[i].revents & POLLIN)
2934                 mask += ZOOM_SELECT_READ;
2935             if (pollfds[i].revents & POLLOUT)
2936                 mask += ZOOM_SELECT_WRITE;
2937             if (pollfds[i].revents & POLLERR)
2938                 mask += ZOOM_SELECT_EXCEPT;
2939             if (mask)
2940                 ZOOM_connection_do_io(c, mask);
2941         }
2942         else if (r == 0 && c->mask)
2943         {
2944             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2945             /* timeout and this connection was waiting */
2946             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2947             do_close (c);
2948             ZOOM_connection_put_event(c, event);
2949         }
2950     }
2951 #else
2952     tv.tv_sec = timeout;
2953     tv.tv_usec = 0;
2954     yaz_log (LOG_DEBUG, "select start");
2955     r = select (max_fd+1, &input, &output, &except, &tv);
2956     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2957     for (i = 0; i<no; i++)
2958     {
2959         ZOOM_connection c = cs[i];
2960         int fd, mask;
2961
2962         if (!c)
2963             continue;
2964         fd = z3950_connection_socket(c);
2965         mask = 0;
2966         if (r && c->mask)
2967         {
2968             /* no timeout and real socket */
2969             if (FD_ISSET(fd, &input))
2970                 mask += ZOOM_SELECT_READ;
2971             if (FD_ISSET(fd, &output))
2972                 mask += ZOOM_SELECT_WRITE;
2973             if (FD_ISSET(fd, &except))
2974                 mask += ZOOM_SELECT_EXCEPT;
2975             if (mask)
2976                 ZOOM_connection_do_io(c, mask);
2977         }
2978         if (r == 0 && c->mask)
2979         {
2980             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2981             /* timeout and this connection was waiting */
2982             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2983             do_close (c);
2984             yaz_log (LOG_DEBUG, "timeout");
2985             ZOOM_connection_put_event(c, event);
2986         }
2987     }
2988 #endif
2989     for (i = 0; i<no; i++)
2990     {
2991         ZOOM_connection c = cs[i];
2992         ZOOM_Event event;
2993         if (c && (event = ZOOM_connection_get_event(c)))
2994         {
2995             ZOOM_Event_destroy (event);
2996             return i+1;
2997         }
2998     }
2999     return 0;
3000 }