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 1.29 2003-03-11 11:09:17 adam Exp $
   6  *
   7  * ZOOM layer for C, connections, result sets, queries.
   8  */
   9 #include <assert.h>
  10 #include <string.h>
  11 #include "zoom-p.h"
  12
  13 #include <yaz/yaz-util.h>
  14 #include <yaz/xmalloc.h>
  15 #include <yaz/otherinfo.h>
  16 #include <yaz/log.h>
  17 #include <yaz/pquery.h>
  18 #include <yaz/marcdisp.h>
  19 #include <yaz/diagbib1.h>
  20 #include <yaz/charneg.h>
  21 #include <yaz/ill.h>
  22 #include <yaz/srw.h>
  23
  24 #if HAVE_SYS_POLL_H
  25 #include <sys/poll.h>
  26 #endif
  27
  28 typedef enum {
  29     zoom_pending,
  30     zoom_complete
  31 } zoom_ret;
  32
  33 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  34 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  35
  36 static ZOOM_Event ZOOM_Event_create (int kind)
  37 {
  38     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  39     event->kind = kind;
  40     event->next = 0;
  41     event->prev = 0;
  42     return event;
  43 }
  44
  45 static void ZOOM_Event_destroy (ZOOM_Event event)
  46 {
  47     xfree (event);
  48 }
  49
  50 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  51 {
  52     if (c->m_queue_back)
  53     {
  54         c->m_queue_back->prev = event;
  55         assert (c->m_queue_front);
  56     }
  57     else
  58     {
  59         assert (!c->m_queue_front);
  60         c->m_queue_front = event;
  61     }
  62     event->next = c->m_queue_back;
  63     event->prev = 0;
  64     c->m_queue_back = event;
  65 }
  66
  67 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  68 {
  69     ZOOM_Event event = c->m_queue_front;
  70     if (!event)
  71         return 0;
  72     assert (c->m_queue_back);
  73     c->m_queue_front = event->prev;
  74     if (c->m_queue_front)
  75     {
  76         assert (c->m_queue_back);
  77         c->m_queue_front->next = 0;
  78     }
  79     else
  80         c->m_queue_back = 0;
  81     c->last_event = event->kind;
  82     return event;
  83 }
  84
  85
  86 static void set_dset_error (ZOOM_connection c, int error,
  87                             const char *dset,
  88                             const char *addinfo, const char *addinfo2)
  89 {
  90     xfree (c->addinfo);
  91     c->addinfo = 0;
  92     c->error = error;
  93     c->diagset = dset;
  94     if (addinfo && addinfo2)
  95     {
  96         c->addinfo = xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
  97         strcpy(c->addinfo, addinfo);
  98         strcat(c->addinfo, addinfo2);
  99     }
 100     else if (addinfo)
 101         c->addinfo = xstrdup(addinfo);
 102     if (error)
 103         yaz_log(LOG_DEBUG, "Error %s %s:%d %s %s",
 104                 c->host_port ? c->host_port : "<>", dset, error,
 105                 addinfo ? addinfo : "",
 106                 addinfo2 ? addinfo2 : "");
 107 }
 108
 109 static void set_HTTP_error (ZOOM_connection c, int error,
 110                             const char *addinfo, const char *addinfo2)
 111 {
 112     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 113 }
 114
 115 static void set_ZOOM_error (ZOOM_connection c, int error,
 116                             const char *addinfo)
 117 {
 118     set_dset_error(c, error, "ZOOM", addinfo, 0);
 119 }
 120
 121 static void clear_error (ZOOM_connection c)
 122 {
 123
 124     switch (c->error)
 125     {
 126     case ZOOM_ERROR_CONNECT:
 127     case ZOOM_ERROR_MEMORY:
 128     case ZOOM_ERROR_DECODE:
 129     case ZOOM_ERROR_CONNECTION_LOST:
 130     case ZOOM_ERROR_INIT:
 131     case ZOOM_ERROR_INTERNAL:
 132     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 133         break;
 134     default:
 135         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 136     }
 137 }
 138
 139 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 140 {
 141     ZOOM_task *taskp = &c->tasks;
 142     while (*taskp)
 143         taskp = &(*taskp)->next;
 144     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 145     (*taskp)->running = 0;
 146     (*taskp)->which = which;
 147     (*taskp)->next = 0;
 148     clear_error (c);
 149     return *taskp;
 150 }
 151
 152 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 153 {
 154     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 155
 156     task->next = c->tasks;
 157     c->tasks = task;
 158
 159     task->running = 0;
 160     task->which = which;
 161     clear_error (c);
 162     return task;
 163 }
 164
 165 void ZOOM_connection_remove_task (ZOOM_connection c)
 166 {
 167     ZOOM_task task = c->tasks;
 168
 169     if (task)
 170     {
 171         c->tasks = task->next;
 172         switch (task->which)
 173         {
 174         case ZOOM_TASK_SEARCH:
 175             ZOOM_resultset_destroy (task->u.search.resultset);
 176             break;
 177         case ZOOM_TASK_RETRIEVE:
 178             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 179             break;
 180         case ZOOM_TASK_CONNECT:
 181             break;
 182         case ZOOM_TASK_SCAN:
 183             ZOOM_scanset_destroy (task->u.scan.scan);
 184             break;
 185         case ZOOM_TASK_PACKAGE:
 186             ZOOM_package_destroy (task->u.package);
 187             break;
 188         default:
 189             assert (0);
 190         }
 191         xfree (task);
 192     }
 193 }
 194
 195 static int ZOOM_connection_exec_task (ZOOM_connection c);
 196
 197 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 198 {
 199     while (c->tasks)
 200         ZOOM_connection_remove_task(c);
 201 }
 202
 203 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 204
 205 ZOOM_API(ZOOM_connection)
 206 ZOOM_connection_create (ZOOM_options options)
 207 {
 208     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 209
 210     c->proto = PROTO_Z3950;
 211     c->cs = 0;
 212     c->mask = 0;
 213     c->reconnect_ok = 0;
 214     c->state = STATE_IDLE;
 215     c->addinfo = 0;
 216     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 217     c->buf_in = 0;
 218     c->len_in = 0;
 219     c->buf_out = 0;
 220     c->len_out = 0;
 221     c->resultsets = 0;
 222
 223     c->options = ZOOM_options_create_with_parent(options);
 224
 225     c->host_port = 0;
 226     c->path = 0;
 227     c->proxy = 0;
 228
 229     c->charset = c->lang = 0;
 230
 231     c->cookie_out = 0;
 232     c->cookie_in = 0;
 233     c->client_IP = 0;
 234     c->tasks = 0;
 235
 236     c->odr_in = odr_createmem (ODR_DECODE);
 237     c->odr_out = odr_createmem (ODR_ENCODE);
 238
 239     c->async = 0;
 240     c->support_named_resultsets = 0;
 241     c->last_event = ZOOM_EVENT_NONE;
 242
 243     c->m_queue_front = 0;
 244     c->m_queue_back = 0;
 245     return c;
 246 }
 247
 248 /* set database names. Take local databases (if set); otherwise
 249    take databases given in ZURL (if set); otherwise use Default */
 250 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 251                                  int *num)
 252 {
 253     char **databaseNames;
 254     const char *c;
 255     int no = 2;
 256     const char *cp = ZOOM_options_get (options, "databaseName");
 257
 258     if (!cp || !*cp)
 259     {
 260         if (strncmp (con->host_port, "unix:", 5) == 0)
 261             cp = strchr (con->host_port+5, ':');
 262         else
 263             cp = strchr (con->host_port, '/');
 264         if (cp)
 265             cp++;
 266     }
 267     if (cp)
 268     {
 269         c = cp;
 270         while ((c = strchr(c, '+')))
 271         {
 272             c++;
 273             no++;
 274         }
 275     }
 276     else
 277         cp = "Default";
 278     databaseNames = (char**)
 279         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 280     no = 0;
 281     while (*cp)
 282     {
 283         c = strchr (cp, '+');
 284         if (!c)
 285             c = cp + strlen(cp);
 286         else if (c == cp)
 287         {
 288             cp++;
 289             continue;
 290         }
 291         /* cp ptr to first char of db name, c is char
 292            following db name */
 293         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 294         memcpy (databaseNames[no], cp, c-cp);
 295         databaseNames[no++][c-cp] = '\0';
 296         cp = c;
 297         if (*cp)
 298             cp++;
 299     }
 300     databaseNames[no] = NULL;
 301     *num = no;
 302     return databaseNames;
 303 }
 304
 305 ZOOM_API(ZOOM_connection)
 306 ZOOM_connection_new (const char *host, int portnum)
 307 {
 308     ZOOM_connection c = ZOOM_connection_create (0);
 309
 310     ZOOM_connection_connect (c, host, portnum);
 311     return c;
 312 }
 313
 314 ZOOM_API(void)
 315 ZOOM_connection_connect(ZOOM_connection c,
 316                         const char *host, int portnum)
 317 {
 318     const char *val;
 319     ZOOM_task task;
 320
 321     if (c->cs)
 322     {
 323         yaz_log (LOG_DEBUG, "reconnect");
 324         c->reconnect_ok = 1;
 325         return;
 326     }
 327     yaz_log(LOG_DEBUG, "connect");
 328     xfree (c->proxy);
 329     val = ZOOM_options_get (c->options, "proxy");
 330     if (val && *val)
 331         c->proxy = xstrdup (val);
 332     else
 333         c->proxy = 0;
 334
 335     xfree (c->charset);
 336     val = ZOOM_options_get (c->options, "charset");
 337     if (val && *val)
 338         c->charset = xstrdup (val);
 339     else
 340         c->charset = 0;
 341
 342     xfree (c->lang);
 343     val = ZOOM_options_get (c->options, "lang");
 344     if (val && *val)
 345         c->lang = xstrdup (val);
 346     else
 347         c->lang = 0;
 348
 349     xfree (c->host_port);
 350     if (portnum)
 351     {
 352         char hostn[128];
 353         sprintf (hostn, "%.80s:%d", host, portnum);
 354         c->host_port = xstrdup(hostn);
 355     }
 356     else
 357         c->host_port = xstrdup(host);
 358
 359     ZOOM_options_set(c->options, "host", c->host_port);
 360
 361     val = ZOOM_options_get (c->options, "cookie");
 362     if (val && *val)
 363         c->cookie_out = xstrdup (val);
 364
 365     val = ZOOM_options_get (c->options, "clientIP");
 366     if (val && *val)
 367         c->client_IP = xstrdup (val);
 368
 369     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 370
 371     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 372
 373     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 374
 375     if (!c->async)
 376     {
 377         while (ZOOM_event (1, &c))
 378             ;
 379     }
 380 }
 381
 382 ZOOM_API(ZOOM_query)
 383 ZOOM_query_create(void)
 384 {
 385     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 386
 387     s->refcount = 1;
 388     s->z_query = 0;
 389     s->sort_spec = 0;
 390     s->odr = odr_createmem (ODR_ENCODE);
 391     s->query_string = 0;
 392
 393     return s;
 394 }
 395
 396 ZOOM_API(void)
 397 ZOOM_query_destroy(ZOOM_query s)
 398 {
 399     if (!s)
 400         return;
 401
 402     (s->refcount)--;
 403     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 404     if (s->refcount == 0)
 405     {
 406         odr_destroy (s->odr);
 407         xfree (s);
 408     }
 409 }
 410
 411 ZOOM_API(int)
 412 ZOOM_query_prefix(ZOOM_query s, const char *str)
 413 {
 414     s->query_string = odr_strdup(s->odr, str);
 415     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 416     s->z_query->which = Z_Query_type_1;
 417     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 418     if (!s->z_query->u.type_1)
 419         return -1;
 420     return 0;
 421 }
 422
 423 ZOOM_API(int)
 424 ZOOM_query_cql(ZOOM_query s, const char *str)
 425 {
 426     Z_External *ext;
 427
 428     s->query_string = odr_strdup(s->odr, str);
 429
 430     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 431     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 432     ext->indirect_reference = 0;
 433     ext->descriptor = 0;
 434     ext->which = Z_External_CQL;
 435     ext->u.cql = s->query_string;
 436
 437     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 438     s->z_query->which = Z_Query_type_104;
 439     s->z_query->u.type_104 =  ext;
 440
 441     return 0;
 442 }
 443
 444 ZOOM_API(int)
 445 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 446 {
 447     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 448     if (!s->sort_spec)
 449         return -1;
 450     return 0;
 451 }
 452
 453 static zoom_ret do_write(ZOOM_connection c);
 454
 455 ZOOM_API(void)
 456 ZOOM_connection_destroy(ZOOM_connection c)
 457 {
 458     ZOOM_resultset r;
 459     if (!c)
 460         return;
 461     if (c->cs)
 462         cs_close (c->cs);
 463     for (r = c->resultsets; r; r = r->next)
 464         r->connection = 0;
 465
 466     xfree (c->buf_in);
 467     xfree (c->addinfo);
 468     odr_destroy (c->odr_in);
 469     odr_destroy (c->odr_out);
 470     ZOOM_options_destroy (c->options);
 471     ZOOM_connection_remove_tasks (c);
 472     xfree (c->host_port);
 473     xfree (c->path);
 474     xfree (c->proxy);
 475     xfree (c->charset);
 476     xfree (c->lang);
 477     xfree (c->cookie_out);
 478     xfree (c->cookie_in);
 479     xfree (c->client_IP);
 480     xfree (c);
 481 }
 482
 483 void ZOOM_resultset_addref (ZOOM_resultset r)
 484 {
 485     if (r)
 486     {
 487         (r->refcount)++;
 488         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 489                  r, r->refcount);
 490     }
 491 }
 492 ZOOM_resultset ZOOM_resultset_create ()
 493 {
 494     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 495
 496     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 497     r->refcount = 1;
 498     r->size = 0;
 499     r->odr = odr_createmem (ODR_ENCODE);
 500     r->start = 0;
 501     r->piggyback = 1;
 502     r->setname = 0;
 503     r->schema = 0;
 504     r->count = 0;
 505     r->record_cache = 0;
 506     r->r_sort_spec = 0;
 507     r->query = 0;
 508     r->connection = 0;
 509     r->next = 0;
 510     return r;
 511 }
 512
 513 ZOOM_API(ZOOM_resultset)
 514 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 515 {
 516     ZOOM_resultset r;
 517     ZOOM_query s = ZOOM_query_create();
 518
 519     ZOOM_query_prefix (s, q);
 520
 521     r = ZOOM_connection_search (c, s);
 522     ZOOM_query_destroy (s);
 523     return r;
 524 }
 525
 526 ZOOM_API(ZOOM_resultset)
 527 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 528 {
 529     ZOOM_resultset r = ZOOM_resultset_create ();
 530     ZOOM_task task;
 531     const char *cp;
 532
 533     r->r_sort_spec = q->sort_spec;
 534     r->query = q;
 535
 536     r->options = ZOOM_options_create_with_parent(c->options);
 537
 538     r->start = ZOOM_options_get_int(r->options, "start", 0);
 539     r->count = ZOOM_options_get_int(r->options, "count", 0);
 540     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 541     cp = ZOOM_options_get (r->options, "setname");
 542     if (cp)
 543         r->setname = xstrdup(cp);
 544     cp = ZOOM_options_get (r->options, "schema");
 545     if (cp)
 546         r->schema = xstrdup(cp);
 547
 548     r->connection = c;
 549
 550     r->next = c->resultsets;
 551     c->resultsets = r;
 552
 553     if (c->host_port && c->proto == PROTO_HTTP)
 554     {
 555         if (!c->cs)
 556         {
 557             yaz_log(LOG_DEBUG, "NO COMSTACK");
 558             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 559         }
 560         else
 561         {
 562             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 563             c->reconnect_ok = 1;
 564         }
 565     }
 566
 567     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 568     task->u.search.resultset = r;
 569     ZOOM_resultset_addref (r);
 570
 571     (q->refcount)++;
 572
 573     if (!c->async)
 574     {
 575         while (ZOOM_event (1, &c))
 576             ;
 577     }
 578     return r;
 579 }
 580
 581 ZOOM_API(void)
 582 ZOOM_resultset_destroy(ZOOM_resultset r)
 583 {
 584     if (!r)
 585         return;
 586     (r->refcount)--;
 587     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 588              r, r->refcount);
 589     if (r->refcount == 0)
 590     {
 591         ZOOM_record_cache rc;
 592
 593         for (rc = r->record_cache; rc; rc = rc->next)
 594             if (rc->rec.wrbuf_marc)
 595                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 596         if (r->connection)
 597         {
 598             /* remove ourselves from the resultsets in connection */
 599             ZOOM_resultset *rp = &r->connection->resultsets;
 600             while (1)
 601             {
 602                 assert (*rp);   /* we must be in this list!! */
 603                 if (*rp == r)
 604                 {   /* OK, we're here - take us out of it */
 605                     *rp = (*rp)->next;
 606                     break;
 607                 }
 608                 rp = &(*rp)->next;
 609             }
 610         }
 611         ZOOM_query_destroy (r->query);
 612         ZOOM_options_destroy (r->options);
 613         odr_destroy (r->odr);
 614         xfree (r->setname);
 615         xfree (r->schema);
 616         xfree (r);
 617     }
 618 }
 619
 620 ZOOM_API(size_t)
 621 ZOOM_resultset_size (ZOOM_resultset r)
 622 {
 623     return r->size;
 624 }
 625
 626 static void do_close (ZOOM_connection c)
 627 {
 628     if (c->cs)
 629         cs_close(c->cs);
 630     c->cs = 0;
 631     c->mask = 0;
 632     c->state = STATE_IDLE;
 633 }
 634
 635 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 636                                      int force_sync, int start, int count)
 637 {
 638     ZOOM_task task;
 639     ZOOM_connection c;
 640     const char *cp;
 641
 642     if (!r)
 643         return;
 644     c = r->connection;
 645     if (!c)
 646         return;
 647
 648     if (c->host_port && c->proto == PROTO_HTTP)
 649     {
 650         if (!c->cs)
 651         {
 652             yaz_log(LOG_DEBUG, "NO COMSTACK");
 653             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 654         }
 655         else
 656         {
 657             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 658             c->reconnect_ok = 1;
 659         }
 660     }
 661     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 662     task->u.retrieve.resultset = r;
 663     task->u.retrieve.start = start;
 664     task->u.retrieve.count = count;
 665
 666     cp = ZOOM_options_get (r->options, "schema");
 667     if (cp)
 668     {
 669         if (!r->schema || strcmp(r->schema, cp))
 670         {
 671             xfree(r->schema);
 672             r->schema = xstrdup(cp);
 673         }
 674     }
 675
 676     ZOOM_resultset_addref (r);
 677
 678     if (!r->connection->async || force_sync)
 679         while (r->connection && ZOOM_event (1, &r->connection))
 680             ;
 681 }
 682
 683 ZOOM_API(void)
 684 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 685                         size_t start, size_t count)
 686 {
 687     int force_present = 0;
 688
 689     if (!r)
 690         return ;
 691     if (count && recs)
 692         force_present = 1;
 693     ZOOM_resultset_retrieve (r, force_present, start, count);
 694     if (force_present)
 695     {
 696         size_t i;
 697         for (i = 0; i< count; i++)
 698             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 699     }
 700 }
 701
 702 static zoom_ret do_connect (ZOOM_connection c)
 703 {
 704     void *add;
 705     const char *effective_host;
 706
 707     if (c->proxy)
 708         effective_host = c->proxy;
 709     else
 710         effective_host = c->host_port;
 711
 712     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 713
 714     assert (!c->cs);
 715     c->cs = cs_create_host (effective_host, 0, &add);
 716
 717     if (c->cs && c->cs->protocol == PROTO_HTTP)
 718     {
 719 #if HAVE_XML2
 720         const char *path = 0;
 721
 722         c->proto = PROTO_HTTP;
 723         cs_get_host_args(c->host_port, &path);
 724         xfree(c->path);
 725         c->path = xstrdup(path);
 726 #else
 727         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 728         do_close(c);
 729         return zoom_complete;
 730 #endif
 731     }
 732     if (c->cs)
 733     {
 734         int ret = cs_connect (c->cs, add);
 735         if (ret == 0)
 736         {
 737             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 738             ZOOM_connection_put_event(c, event);
 739             if (c->proto == PROTO_Z3950)
 740                 ZOOM_connection_send_init(c);
 741             else
 742             {
 743                 /* no init request for SRW .. */
 744                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 745                 ZOOM_connection_remove_task (c);
 746                 c->mask = 0;
 747                 ZOOM_connection_exec_task (c);
 748             }
 749             c->state = STATE_ESTABLISHED;
 750             return zoom_pending;
 751         }
 752         else if (ret > 0)
 753         {
 754             c->state = STATE_CONNECTING;
 755             c->mask = ZOOM_SELECT_EXCEPT;
 756             if (c->cs->io_pending & CS_WANT_WRITE)
 757                 c->mask += ZOOM_SELECT_WRITE;
 758             if (c->cs->io_pending & CS_WANT_READ)
 759                 c->mask += ZOOM_SELECT_READ;
 760             return zoom_pending;
 761         }
 762     }
 763     c->state = STATE_IDLE;
 764     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 765     return zoom_complete;
 766 }
 767
 768 int z3950_connection_socket(ZOOM_connection c)
 769 {
 770     if (c->cs)
 771         return cs_fileno(c->cs);
 772     return -1;
 773 }
 774
 775 int z3950_connection_mask(ZOOM_connection c)
 776 {
 777     if (c->cs)
 778         return c->mask;
 779     return 0;
 780 }
 781
 782 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 783 {
 784     int i;
 785     for (i = 0; i<200; i++)
 786     {
 787         size_t len;
 788         Z_OtherInformation **oi;
 789         char buf[80];
 790         const char *val;
 791         const char *cp;
 792         int oidval;
 793
 794         sprintf (buf, "otherInfo%d", i);
 795         val = ZOOM_options_get (c->options, buf);
 796         if (!val)
 797             break;
 798         cp = strchr (val, ':');
 799         if (!cp)
 800             continue;
 801         len = cp - val;
 802         if (len >= sizeof(buf))
 803             len = sizeof(buf)-1;
 804         memcpy (buf, val, len);
 805         buf[len] = '\0';
 806         oidval = oid_getvalbyname (buf);
 807         if (oidval == VAL_NONE)
 808             continue;
 809
 810         yaz_oi_APDU(a, &oi);
 811         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 812     }
 813 }
 814
 815 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 816 {
 817     assert (a);
 818     if (c->cookie_out)
 819     {
 820         Z_OtherInformation **oi;
 821         yaz_oi_APDU(a, &oi);
 822         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 823     }
 824     if (c->client_IP)
 825     {
 826         Z_OtherInformation **oi;
 827         yaz_oi_APDU(a, &oi);
 828         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 829     }
 830     otherInfo_attach (c, a, out);
 831     if (!z_APDU(out, &a, 0, 0))
 832     {
 833         FILE *outf = fopen("/tmp/apdu.txt", "a");
 834         if (a && outf)
 835         {
 836             ODR odr_pr = odr_createmem(ODR_PRINT);
 837             fprintf (outf, "a=%p\n", a);
 838             odr_setprint(odr_pr, outf);
 839             z_APDU(odr_pr, &a, 0, 0);
 840             odr_destroy(odr_pr);
 841         }
 842         yaz_log (LOG_DEBUG, "encoding failed");
 843         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 844         odr_reset(out);
 845         return -1;
 846     }
 847
 848     return 0;
 849 }
 850
 851 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 852 {
 853     ZOOM_Event event;
 854     assert (a);
 855     if (encode_APDU(c, a, c->odr_out))
 856         return zoom_complete;
 857     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 858     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 859     ZOOM_connection_put_event (c, event);
 860     odr_reset(c->odr_out);
 861     return do_write (c);
 862 }
 863
 864 /* returns 1 if PDU was sent OK (still pending )
 865            0 if PDU was not sent OK (nothing to wait for)
 866 */
 867
 868 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 869 {
 870     const char *impname;
 871     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 872     Z_InitRequest *ireq = apdu->u.initRequest;
 873     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 874         odr_malloc(c->odr_out, sizeof(*auth));
 875     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 876     const char *auth_userId = ZOOM_options_get (c->options, "user");
 877     const char *auth_password = ZOOM_options_get (c->options, "pass");
 878
 879     ODR_MASK_SET(ireq->options, Z_Options_search);
 880     ODR_MASK_SET(ireq->options, Z_Options_present);
 881     ODR_MASK_SET(ireq->options, Z_Options_scan);
 882     ODR_MASK_SET(ireq->options, Z_Options_sort);
 883     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 884     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 885
 886     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 887     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 888     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 889
 890     impname = ZOOM_options_get (c->options, "implementationName");
 891     ireq->implementationName =
 892         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 893     strcpy (ireq->implementationName, "");
 894     if (impname)
 895     {
 896         strcat (ireq->implementationName, impname);
 897         strcat (ireq->implementationName, "/");
 898     }
 899     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 900
 901     *ireq->maximumRecordSize =
 902         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 903     *ireq->preferredMessageSize =
 904         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 905
 906     if (auth_groupId || auth_password)
 907     {
 908         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 909         int i = 0;
 910         pass->groupId = 0;
 911         if (auth_groupId && *auth_groupId)
 912         {
 913             pass->groupId = (char *)
 914                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 915             strcpy(pass->groupId, auth_groupId);
 916             i++;
 917         }
 918         pass->userId = 0;
 919         if (auth_userId && *auth_userId)
 920         {
 921             pass->userId = (char *)
 922                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 923             strcpy(pass->userId, auth_userId);
 924             i++;
 925         }
 926         pass->password = 0;
 927         if (auth_password && *auth_password)
 928         {
 929             pass->password = (char *)
 930                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 931             strcpy(pass->password, auth_password);
 932             i++;
 933         }
 934         if (i)
 935         {
 936             auth->which = Z_IdAuthentication_idPass;
 937             auth->u.idPass = pass;
 938             ireq->idAuthentication = auth;
 939         }
 940     }
 941     else if (auth_userId)
 942     {
 943         auth->which = Z_IdAuthentication_open;
 944         auth->u.open = (char *)
 945             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 946         strcpy(auth->u.open, auth_userId);
 947         ireq->idAuthentication = auth;
 948     }
 949     if (c->proxy)
 950         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 951                                  VAL_PROXY, 1, c->host_port);
 952     if (c->charset||c->lang)
 953     {
 954         Z_OtherInformation **oi;
 955         Z_OtherInformationUnit *oi_unit;
 956
 957         yaz_oi_APDU(apdu, &oi);
 958
 959         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 960         {
 961             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 962
 963             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 964             oi_unit->information.externallyDefinedInfo =
 965                 yaz_set_proposal_charneg
 966                 (c->odr_out,
 967                  (const char **)&c->charset, (c->charset) ? 1:0,
 968                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 969         }
 970     }
 971     assert (apdu);
 972     return send_APDU (c, apdu);
 973 }
 974
 975 #if HAVE_XML2
 976 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
 977 {
 978     char ctype[50];
 979     Z_SOAP_Handler h[2] = {
 980         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 981         {0, 0, 0}
 982     };
 983     ODR o = odr_createmem(ODR_ENCODE);
 984     int ret;
 985     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 986     Z_GDU *gdu;
 987     ZOOM_Event event;
 988
 989     gdu = z_get_HTTP_Request(c->odr_out);
 990     gdu->u.HTTP_Request->path = c->path;
 991
 992     strcpy(ctype, "text/xml");
 993     if (c->charset && strlen(c->charset) < 20)
 994     {
 995         strcat(ctype, "; charset=");
 996         strcat(ctype, c->charset);
 997     }
 998     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 999                       "Content-Type", ctype);
1000     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1001                       "SOAPAction", "\"\"");
1002     p->which = Z_SOAP_generic;
1003     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1004     p->u.generic->no = 0;
1005     p->u.generic->ns = 0;
1006     p->u.generic->p = sr;
1007     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1008
1009     ret = z_soap_codec_enc(o, &p,
1010                            &gdu->u.HTTP_Request->content_buf,
1011                            &gdu->u.HTTP_Request->content_len, h,
1012                            c->charset);
1013
1014     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1015         return zoom_complete;
1016     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1017
1018     odr_destroy(o);
1019
1020     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1021     ZOOM_connection_put_event (c, event);
1022     odr_reset(c->odr_out);
1023     return do_write (c);
1024 }
1025 #endif
1026
1027 #if HAVE_XML2
1028 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1029 {
1030     int i;
1031     ZOOM_resultset resultset = 0;
1032     Z_SRW_PDU *sr = 0;
1033
1034     if (c->error)                  /* don't continue on error */
1035         return zoom_complete;
1036     assert (c->tasks);
1037     if (c->tasks->which == ZOOM_TASK_SEARCH)
1038     {
1039         resultset = c->tasks->u.search.resultset;
1040         resultset->setname = xstrdup ("default");
1041         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1042     }
1043     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1044     {
1045         resultset = c->tasks->u.retrieve.resultset;
1046
1047         resultset->start = c->tasks->u.retrieve.start;
1048         resultset->count = c->tasks->u.retrieve.count;
1049
1050         if (resultset->start >= resultset->size)
1051             return zoom_complete;
1052         if (resultset->start + resultset->count > resultset->size)
1053             resultset->count = resultset->size - resultset->start;
1054
1055         for (i = 0; i<resultset->count; i++)
1056         {
1057             ZOOM_record rec =
1058                 record_cache_lookup (resultset, i + resultset->start);
1059             if (!rec)
1060                 break;
1061         }
1062         if (i == resultset->count)
1063             return zoom_complete;
1064     }
1065     assert(resultset->query);
1066
1067     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1068
1069     if (resultset->query->z_query->which == Z_Query_type_104
1070         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1071     {
1072
1073         sr->u.request->query_type = Z_SRW_query_type_cql;
1074         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1075     }
1076     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1077              resultset->query->z_query->u.type_1)
1078     {
1079         sr->u.request->query_type = Z_SRW_query_type_pqf;
1080         sr->u.request->query.pqf = resultset->query->query_string;
1081     }
1082     else
1083     {
1084         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1085         return zoom_complete;
1086     }
1087     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1088     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1089     sr->u.request->recordSchema = resultset->schema;
1090
1091
1092     return send_srw(c, sr);
1093 }
1094 #else
1095 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1096 {
1097     return zoom_complete;
1098 }
1099 #endif
1100
1101 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1102 {
1103     ZOOM_resultset r;
1104     int lslb, ssub, mspn;
1105     const char *syntax;
1106     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1107     Z_SearchRequest *search_req = apdu->u.searchRequest;
1108     const char *elementSetName;
1109     const char *smallSetElementSetName;
1110     const char *mediumSetElementSetName;
1111
1112     assert (c->tasks);
1113     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1114
1115     r = c->tasks->u.search.resultset;
1116
1117     elementSetName =
1118         ZOOM_options_get (r->options, "elementSetName");
1119     smallSetElementSetName  =
1120         ZOOM_options_get (r->options, "smallSetElementSetName");
1121     mediumSetElementSetName =
1122         ZOOM_options_get (r->options, "mediumSetElementSetName");
1123
1124     if (!smallSetElementSetName)
1125         smallSetElementSetName = elementSetName;
1126
1127     if (!mediumSetElementSetName)
1128         mediumSetElementSetName = elementSetName;
1129
1130     assert (r);
1131     assert (r->query);
1132
1133     /* prepare query for the search request */
1134     search_req->query = r->query->z_query;
1135
1136     search_req->databaseNames =
1137         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1138
1139     /* get syntax (no need to provide unless piggyback is in effect) */
1140     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1141
1142     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1143     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1144     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1145     if (lslb != -1 && ssub != -1 && mspn != -1)
1146     {
1147         /* So're a Z39.50 expert? Let's hope you don't do sort */
1148         *search_req->largeSetLowerBound = lslb;
1149         *search_req->smallSetUpperBound = ssub;
1150         *search_req->mediumSetPresentNumber = mspn;
1151     }
1152     else if (r->start == 0 && r->count > 0
1153              && r->piggyback && !r->r_sort_spec && !r->schema)
1154     {
1155         /* Regular piggyback - do it unless we're going to do sort */
1156         *search_req->largeSetLowerBound = 2000000000;
1157         *search_req->smallSetUpperBound = 0;
1158         *search_req->mediumSetPresentNumber = r->count;
1159         smallSetElementSetName = 0;
1160     }
1161     else
1162     {
1163         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1164         smallSetElementSetName = 0;
1165         mediumSetElementSetName = 0;
1166         syntax = 0;
1167     }
1168     if (smallSetElementSetName && *smallSetElementSetName)
1169     {
1170         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1171             odr_malloc (c->odr_out, sizeof(*esn));
1172
1173         esn->which = Z_ElementSetNames_generic;
1174         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1175         search_req->smallSetElementSetNames = esn;
1176     }
1177     if (mediumSetElementSetName && *mediumSetElementSetName)
1178     {
1179         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1180             odr_malloc (c->odr_out, sizeof(*esn));
1181
1182         esn->which = Z_ElementSetNames_generic;
1183         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1184         search_req->mediumSetElementSetNames = esn;
1185     }
1186     if (syntax)
1187         search_req->preferredRecordSyntax =
1188             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1189
1190     if (!r->setname)
1191     {
1192         if (c->support_named_resultsets)
1193         {
1194             char setname[14];
1195             int ord;
1196             /* find the lowest unused ordinal so that we re-use
1197                result sets on the server. */
1198             for (ord = 1; ; ord++)
1199             {
1200                 ZOOM_resultset rp;
1201                 sprintf (setname, "%d", ord);
1202                 for (rp = c->resultsets; rp; rp = rp->next)
1203                     if (rp->setname && !strcmp (rp->setname, setname))
1204                         break;
1205                 if (!rp)
1206                     break;
1207             }
1208             r->setname = xstrdup (setname);
1209             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1210         }
1211         else
1212             r->setname = xstrdup ("default");
1213         ZOOM_options_set (r->options, "setname", r->setname);
1214     }
1215     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1216     /* send search request */
1217     return send_APDU (c, apdu);
1218 }
1219
1220 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1221 {
1222     int oclass;
1223     Z_DefaultDiagFormat *r;
1224     char *addinfo = 0;
1225
1226     xfree (c->addinfo);
1227     c->addinfo = 0;
1228     if (p->which != Z_DiagRec_defaultFormat)
1229     {
1230         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1231         return;
1232     }
1233     r = p->u.defaultFormat;
1234     switch (r->which)
1235     {
1236     case Z_DefaultDiagFormat_v2Addinfo:
1237         addinfo = r->u.v2Addinfo;
1238         break;
1239     case Z_DefaultDiagFormat_v3Addinfo:
1240         addinfo = r->u.v3Addinfo;
1241         break;
1242     }
1243     set_dset_error(c, *r->condition,
1244                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1245                    addinfo, 0);
1246 }
1247
1248 ZOOM_API(ZOOM_record)
1249 ZOOM_record_clone (ZOOM_record srec)
1250 {
1251     char *buf;
1252     int size;
1253     ODR odr_enc;
1254     ZOOM_record nrec;
1255
1256     odr_enc = odr_createmem(ODR_ENCODE);
1257     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1258         return 0;
1259     buf = odr_getbuf (odr_enc, &size, 0);
1260
1261     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1262     nrec->odr = odr_createmem(ODR_DECODE);
1263     nrec->wrbuf_marc = 0;
1264     odr_setbuf (nrec->odr, buf, size, 0);
1265     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1266
1267     odr_destroy (odr_enc);
1268     return nrec;
1269 }
1270
1271 ZOOM_API(ZOOM_record)
1272 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1273 {
1274     return record_cache_lookup (s, pos);
1275 }
1276
1277 ZOOM_API(ZOOM_record)
1278 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1279 {
1280     ZOOM_resultset_retrieve (r, 1, pos, 1);
1281     return ZOOM_resultset_record_immediate (r, pos);
1282 }
1283
1284 ZOOM_API(void)
1285 ZOOM_record_destroy (ZOOM_record rec)
1286 {
1287     if (!rec)
1288         return;
1289     if (rec->wrbuf_marc)
1290         wrbuf_free (rec->wrbuf_marc, 1);
1291     odr_destroy (rec->odr);
1292     xfree (rec);
1293 }
1294
1295 ZOOM_API(const char *)
1296 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1297 {
1298     Z_NamePlusRecord *npr;
1299
1300     if (len)
1301         *len = 0; /* default return */
1302
1303     if (!rec)
1304         return 0;
1305     npr = rec->npr;
1306     if (!npr)
1307         return 0;
1308     if (!strcmp (type, "database"))
1309     {
1310         if (len)
1311             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1312         return npr->databaseName;
1313     }
1314     else if (!strcmp (type, "syntax"))
1315     {
1316         const char *desc = 0;
1317         if (npr->which == Z_NamePlusRecord_databaseRecord)
1318         {
1319             Z_External *r = (Z_External *) npr->u.databaseRecord;
1320             oident *ent = oid_getentbyoid(r->direct_reference);
1321             if (ent)
1322                 desc = ent->desc;
1323         }
1324         if (!desc)
1325             desc = "none";
1326         if (len)
1327             *len = strlen(desc);
1328         return desc;
1329     }
1330     else if (!strcmp (type, "render") &&
1331              npr->which == Z_NamePlusRecord_databaseRecord)
1332     {
1333         Z_External *r = (Z_External *) npr->u.databaseRecord;
1334         oident *ent = oid_getentbyoid(r->direct_reference);
1335
1336         if (r->which == Z_External_sutrs)
1337         {
1338             if (len) *len = r->u.sutrs->len;
1339             return (const char *) r->u.sutrs->buf;
1340         }
1341         else if (r->which == Z_External_octet)
1342         {
1343             yaz_marc_t mt;
1344             switch (ent->value)
1345             {
1346             case VAL_SOIF:
1347             case VAL_HTML:
1348             case VAL_SUTRS:
1349                 break;
1350             case VAL_TEXT_XML:
1351             case VAL_APPLICATION_XML:
1352                 break;
1353             default:
1354                 if (!rec->wrbuf_marc)
1355                     rec->wrbuf_marc = wrbuf_alloc();
1356
1357                 mt = yaz_marc_create();
1358                 wrbuf_rewind (rec->wrbuf_marc);
1359                 if (yaz_marc_decode_wrbuf (
1360                         mt, (const char *) r->u.octet_aligned->buf,
1361                         r->u.octet_aligned->len,
1362                         rec->wrbuf_marc) > 0)
1363                 {
1364                     if (len)
1365                         *len = wrbuf_len(rec->wrbuf_marc);
1366                     yaz_marc_destroy(mt);
1367                     return wrbuf_buf(rec->wrbuf_marc);
1368                 }
1369                 yaz_marc_destroy(mt);
1370             }
1371             if (len)
1372                 *len = r->u.octet_aligned->len;
1373             return (const char *) r->u.octet_aligned->buf;
1374         }
1375         else if (r->which == Z_External_grs1)
1376         {
1377             if (!rec->wrbuf_marc)
1378                 rec->wrbuf_marc = wrbuf_alloc();
1379             wrbuf_rewind (rec->wrbuf_marc);
1380             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1381             if (len)
1382                 *len = wrbuf_len(rec->wrbuf_marc);
1383             return wrbuf_buf(rec->wrbuf_marc);
1384         }
1385         return 0;
1386     }
1387     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1388              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1389     {
1390         Z_External *r = (Z_External *) npr->u.databaseRecord;
1391         oident *ent = oid_getentbyoid(r->direct_reference);
1392
1393         if (r->which == Z_External_sutrs)
1394         {
1395             if (len) *len = r->u.sutrs->len;
1396             return (const char *) r->u.sutrs->buf;
1397         }
1398         else if (r->which == Z_External_octet)
1399         {
1400             yaz_marc_t mt;
1401             int marc_decode_type = YAZ_MARC_MARCXML;
1402
1403             if (!strcmp(type, "oai"))
1404                 marc_decode_type = YAZ_MARC_OAIMARC;
1405             switch (ent->value)
1406             {
1407             case VAL_SOIF:
1408             case VAL_HTML:
1409             case VAL_SUTRS:
1410                 break;
1411             case VAL_TEXT_XML:
1412             case VAL_APPLICATION_XML:
1413                 break;
1414             default:
1415                 if (!rec->wrbuf_marc)
1416                     rec->wrbuf_marc = wrbuf_alloc();
1417                 wrbuf_rewind (rec->wrbuf_marc);
1418                 mt = yaz_marc_create();
1419
1420                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1421                 if (yaz_marc_decode_wrbuf (
1422                         mt, (const char *) r->u.octet_aligned->buf,
1423                         r->u.octet_aligned->len,
1424                         rec->wrbuf_marc) > 0)
1425                 {
1426                     if (len)
1427                         *len = wrbuf_len(rec->wrbuf_marc);
1428                     yaz_marc_destroy(mt);
1429                     return wrbuf_buf(rec->wrbuf_marc);
1430                 }
1431                 yaz_marc_destroy(mt);
1432             }
1433             if (len) *len = r->u.octet_aligned->len;
1434             return (const char *) r->u.octet_aligned->buf;
1435         }
1436         else if (r->which == Z_External_grs1)
1437         {
1438             if (len) *len = 5;
1439             return "GRS-1";
1440         }
1441         return 0;
1442     }
1443     else if (!strcmp (type, "raw"))
1444     {
1445         if (npr->which == Z_NamePlusRecord_databaseRecord)
1446         {
1447             Z_External *r = (Z_External *) npr->u.databaseRecord;
1448
1449             if (r->which == Z_External_sutrs)
1450             {
1451                 if (len) *len = r->u.sutrs->len;
1452                 return (const char *) r->u.sutrs->buf;
1453             }
1454             else if (r->which == Z_External_octet)
1455             {
1456                 if (len) *len = r->u.octet_aligned->len;
1457                 return (const char *) r->u.octet_aligned->buf;
1458             }
1459             else /* grs-1, explain, ... */
1460             {
1461                 if (len) *len = -1;
1462                 return (const char *) npr->u.databaseRecord;
1463             }
1464         }
1465         return 0;
1466     }
1467     else if (!strcmp (type, "ext"))
1468     {
1469         if (npr->which == Z_NamePlusRecord_databaseRecord)
1470             return (const char *) npr->u.databaseRecord;
1471         return 0;
1472     }
1473     return 0;
1474 }
1475
1476 static int strcmp_null(const char *v1, const char *v2)
1477 {
1478     if (!v1 && !v2)
1479         return 0;
1480     if (!v1 || !v2)
1481         return -1;
1482     return strcmp(v1, v2);
1483 }
1484
1485 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1486                               int pos)
1487 {
1488     ZOOM_record_cache rc;
1489     const char *elementSetName =
1490         ZOOM_resultset_option_get (r, "elementSetName");
1491     const char *syntax =
1492         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1493
1494     for (rc = r->record_cache; rc; rc = rc->next)
1495     {
1496         if (pos == rc->pos)
1497         {
1498             if (strcmp_null(r->schema, rc->schema))
1499                 continue;
1500             if (strcmp_null(elementSetName,rc->elementSetName))
1501                 continue;
1502             if (strcmp_null(syntax, rc->syntax))
1503                 continue;
1504             /* not destroying rc->npr (it's handled by nmem )*/
1505             rc->rec.npr = npr;
1506             /* keeping wrbuf_marc too */
1507             return;
1508         }
1509     }
1510     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1511     rc->rec.npr = npr;
1512     rc->rec.odr = 0;
1513     rc->rec.wrbuf_marc = 0;
1514     if (elementSetName)
1515         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1516     else
1517         rc->elementSetName = 0;
1518
1519     if (syntax)
1520         rc->syntax = odr_strdup (r->odr, syntax);
1521     else
1522         rc->syntax = 0;
1523
1524     if (r->schema)
1525         rc->schema = odr_strdup (r->odr, r->schema);
1526     else
1527         rc->schema = 0;
1528
1529     rc->pos = pos;
1530     rc->next = r->record_cache;
1531     r->record_cache = rc;
1532 }
1533
1534 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1535 {
1536     ZOOM_record_cache rc;
1537     const char *elementSetName =
1538         ZOOM_resultset_option_get (r, "elementSetName");
1539     const char *syntax =
1540         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1541
1542     for (rc = r->record_cache; rc; rc = rc->next)
1543     {
1544         if (pos == rc->pos)
1545         {
1546             if (strcmp_null(r->schema, rc->schema))
1547                 continue;
1548             if (strcmp_null(elementSetName,rc->elementSetName))
1549                 continue;
1550             if (strcmp_null(syntax, rc->syntax))
1551                 continue;
1552             return &rc->rec;
1553         }
1554     }
1555     return 0;
1556 }
1557
1558 static void handle_records (ZOOM_connection c, Z_Records *sr,
1559                             int present_phase)
1560 {
1561     ZOOM_resultset resultset;
1562
1563     if (!c->tasks)
1564         return ;
1565     switch (c->tasks->which)
1566     {
1567     case ZOOM_TASK_SEARCH:
1568         resultset = c->tasks->u.search.resultset;
1569         break;
1570     case ZOOM_TASK_RETRIEVE:
1571         resultset = c->tasks->u.retrieve.resultset;
1572         break;
1573     default:
1574         return;
1575     }
1576     if (sr && sr->which == Z_Records_NSD)
1577     {
1578         Z_DiagRec dr, *dr_p = &dr;
1579         dr.which = Z_DiagRec_defaultFormat;
1580         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1581
1582         response_diag (c, dr_p);
1583     }
1584     else if (sr && sr->which == Z_Records_multipleNSD)
1585     {
1586         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1587             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1588         else
1589             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1590     }
1591     else
1592     {
1593         if (resultset->count + resultset->start > resultset->size)
1594             resultset->count = resultset->size - resultset->start;
1595         if (resultset->count < 0)
1596             resultset->count = 0;
1597         if (sr && sr->which == Z_Records_DBOSD)
1598         {
1599             int i;
1600             NMEM nmem = odr_extract_mem (c->odr_in);
1601             Z_NamePlusRecordList *p =
1602                 sr->u.databaseOrSurDiagnostics;
1603             for (i = 0; i<p->num_records; i++)
1604             {
1605                 record_cache_add (resultset, p->records[i],
1606                                   i+ resultset->start);
1607             }
1608             /* transfer our response to search_nmem .. we need it later */
1609             nmem_transfer (resultset->odr->mem, nmem);
1610             nmem_destroy (nmem);
1611             if (present_phase && p->num_records == 0)
1612             {
1613                 /* present response and we didn't get any records! */
1614                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1615             }
1616         }
1617         else if (present_phase)
1618         {
1619             /* present response and we didn't get any records! */
1620             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1621         }
1622     }
1623 }
1624
1625 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1626 {
1627     handle_records (c, pr->records, 1);
1628 }
1629
1630 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1631 {
1632     ZOOM_resultset resultset;
1633
1634     yaz_log (LOG_DEBUG, "got search response");
1635
1636     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1637         return ;
1638
1639     resultset = c->tasks->u.search.resultset;
1640
1641     resultset->size = *sr->resultCount;
1642     handle_records (c, sr->records, 0);
1643 }
1644
1645 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1646 {
1647     if (res->diagnostics && res->num_diagnostics > 0)
1648         response_diag (c, res->diagnostics[0]);
1649 }
1650
1651 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1652 {
1653     NMEM nmem = odr_extract_mem (c->odr_in);
1654     ZOOM_scanset scan;
1655
1656     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1657         return 0;
1658     scan = c->tasks->u.scan.scan;
1659
1660     if (res->entries && res->entries->nonsurrogateDiagnostics)
1661         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1662     scan->scan_response = res;
1663     nmem_transfer (scan->odr->mem, nmem);
1664     if (res->stepSize)
1665         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1666     if (res->positionOfTerm)
1667         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1668     if (res->scanStatus)
1669         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1670     if (res->numberOfEntriesReturned)
1671         ZOOM_options_set_int (scan->options, "number",
1672                               *res->numberOfEntriesReturned);
1673     nmem_destroy (nmem);
1674     return 1;
1675 }
1676
1677 static zoom_ret send_sort (ZOOM_connection c)
1678 {
1679     ZOOM_resultset  resultset;
1680
1681     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1682         return zoom_complete;
1683
1684     resultset = c->tasks->u.search.resultset;
1685
1686     if (c->error)
1687     {
1688         resultset->r_sort_spec = 0;
1689         return zoom_complete;
1690     }
1691     if (resultset->r_sort_spec)
1692     {
1693         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1694         Z_SortRequest *req = apdu->u.sortRequest;
1695
1696         req->num_inputResultSetNames = 1;
1697         req->inputResultSetNames = (Z_InternationalString **)
1698             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1699         req->inputResultSetNames[0] =
1700             odr_strdup (c->odr_out, resultset->setname);
1701         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1702         req->sortSequence = resultset->r_sort_spec;
1703         resultset->r_sort_spec = 0;
1704         return send_APDU (c, apdu);
1705     }
1706     return zoom_complete;
1707 }
1708
1709 static zoom_ret send_present (ZOOM_connection c)
1710 {
1711     Z_APDU *apdu = 0;
1712     Z_PresentRequest *req = 0;
1713     int i = 0;
1714     const char *syntax = 0;
1715     const char *elementSetName = 0;
1716     ZOOM_resultset  resultset;
1717
1718     if (!c->tasks)
1719         return zoom_complete;
1720
1721     switch (c->tasks->which)
1722     {
1723     case ZOOM_TASK_SEARCH:
1724         resultset = c->tasks->u.search.resultset;
1725         break;
1726     case ZOOM_TASK_RETRIEVE:
1727         resultset = c->tasks->u.retrieve.resultset;
1728         resultset->start = c->tasks->u.retrieve.start;
1729         resultset->count = c->tasks->u.retrieve.count;
1730
1731         if (resultset->start >= resultset->size)
1732             return zoom_complete;
1733         if (resultset->start + resultset->count > resultset->size)
1734             resultset->count = resultset->size - resultset->start;
1735         break;
1736     default:
1737         return zoom_complete;
1738     }
1739
1740     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1741     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1742
1743     if (c->error)                  /* don't continue on error */
1744         return zoom_complete;
1745     if (resultset->start < 0)
1746         return zoom_complete;
1747     for (i = 0; i<resultset->count; i++)
1748     {
1749         ZOOM_record rec =
1750             record_cache_lookup (resultset, i + resultset->start);
1751         if (!rec)
1752             break;
1753     }
1754     if (i == resultset->count)
1755         return zoom_complete;
1756
1757     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1758     req = apdu->u.presentRequest;
1759
1760     resultset->start += i;
1761     resultset->count -= i;
1762     *req->resultSetStartPoint = resultset->start + 1;
1763     *req->numberOfRecordsRequested = resultset->count;
1764     assert (*req->numberOfRecordsRequested > 0);
1765
1766     if (syntax && *syntax)
1767         req->preferredRecordSyntax =
1768             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1769
1770     if (resultset->schema && *resultset->schema)
1771     {
1772         Z_RecordComposition *compo = (Z_RecordComposition *)
1773             odr_malloc (c->odr_out, sizeof(*compo));
1774
1775         req->recordComposition = compo;
1776         compo->which = Z_RecordComp_complex;
1777         compo->u.complex = (Z_CompSpec *)
1778             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1779         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1780             odr_malloc(c->odr_out, sizeof(bool_t));
1781         *compo->u.complex->selectAlternativeSyntax = 0;
1782
1783         compo->u.complex->generic = (Z_Specification *)
1784             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1785
1786         compo->u.complex->generic->which = Z_Schema_oid;
1787         compo->u.complex->generic->schema.oid = (Odr_oid *)
1788             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1789
1790         if (!compo->u.complex->generic->schema.oid)
1791         {
1792             /* OID wasn't a schema! Try record syntax instead. */
1793
1794             compo->u.complex->generic->schema.oid = (Odr_oid *)
1795                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1796         }
1797         if (elementSetName && *elementSetName)
1798         {
1799             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1800                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1801             compo->u.complex->generic->elementSpec->which =
1802                 Z_ElementSpec_elementSetName;
1803             compo->u.complex->generic->elementSpec->u.elementSetName =
1804                 odr_strdup (c->odr_out, elementSetName);
1805         }
1806         else
1807             compo->u.complex->generic->elementSpec = 0;
1808         compo->u.complex->num_dbSpecific = 0;
1809         compo->u.complex->dbSpecific = 0;
1810         compo->u.complex->num_recordSyntax = 0;
1811         compo->u.complex->recordSyntax = 0;
1812     }
1813     else if (elementSetName && *elementSetName)
1814     {
1815         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1816             odr_malloc (c->odr_out, sizeof(*esn));
1817         Z_RecordComposition *compo = (Z_RecordComposition *)
1818             odr_malloc (c->odr_out, sizeof(*compo));
1819
1820         esn->which = Z_ElementSetNames_generic;
1821         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1822         compo->which = Z_RecordComp_simple;
1823         compo->u.simple = esn;
1824         req->recordComposition = compo;
1825     }
1826     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1827     return send_APDU (c, apdu);
1828 }
1829
1830 ZOOM_API(ZOOM_scanset)
1831 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1832 {
1833     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1834
1835     scan->connection = c;
1836     scan->odr = odr_createmem (ODR_DECODE);
1837     scan->options = ZOOM_options_create_with_parent (c->options);
1838     scan->refcount = 1;
1839     scan->scan_response = 0;
1840
1841     if ((scan->termListAndStartPoint =
1842          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1843                       start)))
1844     {
1845         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1846         task->u.scan.scan = scan;
1847
1848         (scan->refcount)++;
1849         if (!c->async)
1850         {
1851             while (ZOOM_event (1, &c))
1852                 ;
1853         }
1854     }
1855     return scan;
1856 }
1857
1858 ZOOM_API(void)
1859 ZOOM_scanset_destroy (ZOOM_scanset scan)
1860 {
1861     if (!scan)
1862         return;
1863     (scan->refcount)--;
1864     if (scan->refcount == 0)
1865     {
1866         odr_destroy (scan->odr);
1867
1868         ZOOM_options_destroy (scan->options);
1869         xfree (scan);
1870     }
1871 }
1872
1873 static zoom_ret send_package (ZOOM_connection c)
1874 {
1875     ZOOM_Event event;
1876     if (!c->tasks)
1877         return zoom_complete;
1878     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1879
1880     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1881     ZOOM_connection_put_event (c, event);
1882
1883     return do_write_ex (c, c->tasks->u.package->buf_out,
1884                         c->tasks->u.package->len_out);
1885 }
1886
1887 static zoom_ret send_scan (ZOOM_connection c)
1888 {
1889     ZOOM_scanset scan;
1890     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1891     Z_ScanRequest *req = apdu->u.scanRequest;
1892     if (!c->tasks)
1893         return zoom_complete;
1894     assert (c->tasks->which == ZOOM_TASK_SCAN);
1895     scan = c->tasks->u.scan.scan;
1896
1897     req->termListAndStartPoint = scan->termListAndStartPoint;
1898     req->attributeSet = scan->attributeSet;
1899
1900     *req->numberOfTermsRequested =
1901         ZOOM_options_get_int(scan->options, "number", 10);
1902
1903     req->preferredPositionInResponse =
1904         odr_intdup (c->odr_out,
1905                     ZOOM_options_get_int(scan->options, "position", 1));
1906
1907     req->stepSize =
1908         odr_intdup (c->odr_out,
1909                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1910
1911     req->databaseNames = set_DatabaseNames (c, scan->options,
1912                                             &req->num_databaseNames);
1913
1914     return send_APDU (c, apdu);
1915 }
1916
1917 ZOOM_API(size_t)
1918 ZOOM_scanset_size (ZOOM_scanset scan)
1919 {
1920     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1921         return 0;
1922     return scan->scan_response->entries->num_entries;
1923 }
1924
1925 ZOOM_API(const char *)
1926 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1927                                int *occ, int *len)
1928 {
1929     const char *term = 0;
1930     size_t noent = ZOOM_scanset_size (scan);
1931     Z_ScanResponse *res = scan->scan_response;
1932
1933     *len = 0;
1934     *occ = 0;
1935     if (pos >= noent)
1936         return 0;
1937     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1938     {
1939         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1940
1941         if (t->term->which == Z_Term_general)
1942         {
1943             term = (const char *) t->term->u.general->buf;
1944             *len = t->term->u.general->len;
1945         }
1946         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1947     }
1948     return term;
1949 }
1950
1951 ZOOM_API(const char *)
1952 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1953 {
1954     return ZOOM_options_get (scan->options, key);
1955 }
1956
1957 ZOOM_API(void)
1958 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1959                               const char *val)
1960 {
1961     ZOOM_options_set (scan->options, key, val);
1962 }
1963
1964 static Z_APDU *create_es_package (ZOOM_package p, int type)
1965 {
1966     const char *str;
1967     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1968     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1969
1970     *req->function = Z_ExtendedServicesRequest_create;
1971
1972     str = ZOOM_options_get(p->options, "package-name");
1973     if (str && *str)
1974         req->packageName = nmem_strdup (p->odr_out->mem, str);
1975
1976     str = ZOOM_options_get(p->options, "user-id");
1977     if (str)
1978         req->userId = nmem_strdup (p->odr_out->mem, str);
1979
1980     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1981                                               type);
1982
1983     str = ZOOM_options_get(p->options, "function");
1984     if (str)
1985     {
1986         if (!strcmp (str, "create"))
1987             *req->function = 1;
1988         if (!strcmp (str, "delete"))
1989             *req->function = 2;
1990         if (!strcmp (str, "modify"))
1991             *req->function = 3;
1992     }
1993     return apdu;
1994 }
1995
1996 static const char *ill_array_lookup (void *clientData, const char *idx)
1997 {
1998     ZOOM_package p = (ZOOM_package) clientData;
1999     return ZOOM_options_get (p->options, idx+4);
2000 }
2001
2002 static Z_External *encode_ill_request (ZOOM_package p)
2003 {
2004     ODR out = p->odr_out;
2005     ILL_Request *req;
2006     Z_External *r = 0;
2007     struct ill_get_ctl ctl;
2008
2009     ctl.odr = p->odr_out;
2010     ctl.clientData = p;
2011     ctl.f = ill_array_lookup;
2012
2013     req = ill_get_ILLRequest(&ctl, "ill", 0);
2014
2015     if (!ill_Request (out, &req, 0, 0))
2016     {
2017         int ill_request_size;
2018         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2019         if (ill_request_buf)
2020             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2021         return 0;
2022     }
2023     else
2024     {
2025         oident oid;
2026         int illRequest_size = 0;
2027         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2028
2029         oid.proto = PROTO_GENERAL;
2030         oid.oclass = CLASS_GENERAL;
2031         oid.value = VAL_ISO_ILL_1;
2032
2033         r = (Z_External *) odr_malloc (out, sizeof(*r));
2034         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2035         r->indirect_reference = 0;
2036         r->descriptor = 0;
2037         r->which = Z_External_single;
2038
2039         r->u.single_ASN1_type = (Odr_oct *)
2040             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2041         r->u.single_ASN1_type->buf = (unsigned char*)
2042             odr_malloc (out, illRequest_size);
2043         r->u.single_ASN1_type->len = illRequest_size;
2044         r->u.single_ASN1_type->size = illRequest_size;
2045         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2046     }
2047     return r;
2048 }
2049
2050 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2051 {
2052     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2053     const char *str;
2054
2055     req->which=Z_IOItemOrder_esRequest;
2056     req->u.esRequest = (Z_IORequest *)
2057         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2058
2059     /* to keep part ... */
2060     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2061         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2062     req->u.esRequest->toKeep->supplDescription = 0;
2063     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2064         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2065
2066     str = ZOOM_options_get(p->options, "contact-name");
2067     req->u.esRequest->toKeep->contact->name = str ?
2068         nmem_strdup (p->odr_out->mem, str) : 0;
2069
2070     str = ZOOM_options_get(p->options, "contact-phone");
2071     req->u.esRequest->toKeep->contact->phone = str ?
2072         nmem_strdup (p->odr_out->mem, str) : 0;
2073
2074     str = ZOOM_options_get(p->options, "contact-email");
2075     req->u.esRequest->toKeep->contact->email = str ?
2076         nmem_strdup (p->odr_out->mem, str) : 0;
2077
2078     req->u.esRequest->toKeep->addlBilling = 0;
2079
2080     /* not to keep part ... */
2081     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2082         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2083
2084     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2085         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2086
2087     str = ZOOM_options_get(p->options, "itemorder-setname");
2088     if (!str)
2089         str = "default";
2090     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2091         nmem_strdup (p->odr_out->mem, str);
2092     req->u.esRequest->notToKeep->resultSetItem->item =
2093         (int *) odr_malloc(p->odr_out, sizeof(int));
2094
2095     str = ZOOM_options_get(p->options, "itemorder-item");
2096     *req->u.esRequest->notToKeep->resultSetItem->item =
2097         (str ? atoi(str) : 1);
2098
2099     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2100
2101     return req;
2102 }
2103
2104 ZOOM_API(void)
2105     ZOOM_package_send (ZOOM_package p, const char *type)
2106 {
2107     Z_APDU *apdu = 0;
2108     ZOOM_connection c;
2109     if (!p)
2110         return;
2111     c = p->connection;
2112     odr_reset (p->odr_out);
2113     xfree (p->buf_out);
2114     p->buf_out = 0;
2115     if (!strcmp(type, "itemorder"))
2116     {
2117         Z_External *r;
2118         apdu = create_es_package (p, VAL_ITEMORDER);
2119         if (apdu)
2120         {
2121             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2122
2123             r->direct_reference =
2124                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2125                                        VAL_ITEMORDER);
2126             r->descriptor = 0;
2127             r->which = Z_External_itemOrder;
2128             r->indirect_reference = 0;
2129             r->u.itemOrder = encode_item_order (p);
2130
2131             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2132         }
2133     }
2134     if (apdu)
2135     {
2136         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2137         {
2138             char *buf;
2139
2140             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2141             task->u.package = p;
2142             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2143             p->buf_out = (char *) xmalloc (p->len_out);
2144             memcpy (p->buf_out, buf, p->len_out);
2145
2146             (p->refcount)++;
2147             if (!c->async)
2148             {
2149                 while (ZOOM_event (1, &c))
2150                     ;
2151             }
2152         }
2153     }
2154 }
2155
2156 ZOOM_API(ZOOM_package)
2157     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2158 {
2159     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2160
2161     p->connection = c;
2162     p->odr_out = odr_createmem (ODR_ENCODE);
2163     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2164     p->refcount = 1;
2165     p->buf_out = 0;
2166     p->len_out = 0;
2167     return p;
2168 }
2169
2170 ZOOM_API(void)
2171     ZOOM_package_destroy(ZOOM_package p)
2172 {
2173     if (!p)
2174         return;
2175     (p->refcount)--;
2176     if (p->refcount == 0)
2177     {
2178         odr_destroy (p->odr_out);
2179         xfree (p->buf_out);
2180
2181         ZOOM_options_destroy (p->options);
2182         xfree (p);
2183     }
2184 }
2185
2186 ZOOM_API(const char *)
2187 ZOOM_package_option_get (ZOOM_package p, const char *key)
2188 {
2189     return ZOOM_options_get (p->options, key);
2190 }
2191
2192
2193 ZOOM_API(void)
2194 ZOOM_package_option_set (ZOOM_package p, const char *key,
2195                               const char *val)
2196 {
2197     ZOOM_options_set (p->options, key, val);
2198 }
2199
2200 static int ZOOM_connection_exec_task (ZOOM_connection c)
2201 {
2202     ZOOM_task task = c->tasks;
2203     zoom_ret ret = zoom_complete;
2204
2205     if (!task)
2206     {
2207         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2208         return 0;
2209     }
2210     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2211              task->which, task->running);
2212     if (c->error != ZOOM_ERROR_NONE)
2213     {
2214         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2215         ZOOM_connection_remove_tasks (c);
2216         return 0;
2217     }
2218     if (task->running)
2219     {
2220         yaz_log (LOG_DEBUG, "task already running");
2221         return 0;
2222     }
2223     task->running = 1;
2224     ret = zoom_complete;
2225     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2226     {
2227         switch (task->which)
2228         {
2229         case ZOOM_TASK_SEARCH:
2230             if (c->proto == PROTO_HTTP)
2231                 ret = ZOOM_connection_srw_send_search(c);
2232             else
2233                 ret = ZOOM_connection_send_search(c);
2234             break;
2235         case ZOOM_TASK_RETRIEVE:
2236             if (c->proto == PROTO_HTTP)
2237                 ret = ZOOM_connection_srw_send_search(c);
2238             else
2239                 ret = send_present (c);
2240             break;
2241         case ZOOM_TASK_CONNECT:
2242             ret = do_connect(c);
2243             break;
2244         case ZOOM_TASK_SCAN:
2245             ret = send_scan(c);
2246             break;
2247         case ZOOM_TASK_PACKAGE:
2248             ret = send_package(c);
2249             break;
2250         }
2251     }
2252     else
2253     {
2254         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2255         ZOOM_connection_remove_tasks (c);
2256     }
2257     if (ret == zoom_complete)
2258     {
2259         yaz_log (LOG_DEBUG, "task removed (complete)");
2260         ZOOM_connection_remove_task (c);
2261         return 0;
2262     }
2263     yaz_log (LOG_DEBUG, "task pending");
2264     return 1;
2265 }
2266
2267 static zoom_ret send_sort_present (ZOOM_connection c)
2268 {
2269     zoom_ret r = send_sort (c);
2270     if (r == zoom_complete)
2271         r = send_present (c);
2272     return r;
2273 }
2274
2275 static int es_response (ZOOM_connection c,
2276                         Z_ExtendedServicesResponse *res)
2277 {
2278     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2279         return 0;
2280     if (res->diagnostics && res->num_diagnostics > 0)
2281         response_diag(c, res->diagnostics[0]);
2282     if (res->taskPackage &&
2283         res->taskPackage->which == Z_External_extendedService)
2284     {
2285         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2286         Odr_oct *id = taskPackage->targetReference;
2287
2288         if (id)
2289             ZOOM_options_setl (c->tasks->u.package->options,
2290                                "targetReference", (char*) id->buf, id->len);
2291     }
2292     return 1;
2293 }
2294
2295
2296 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2297 {
2298     Z_InitResponse *initrs;
2299
2300     c->mask = 0;
2301     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2302     switch(apdu->which)
2303     {
2304     case Z_APDU_initResponse:
2305         initrs = apdu->u.initResponse;
2306         ZOOM_connection_option_set(c, "targetImplementationId",
2307                                    initrs->implementationId ?
2308                                    initrs->implementationId : "");
2309         ZOOM_connection_option_set(c, "targetImplementationName",
2310                                    initrs->implementationName ?
2311                                    initrs->implementationName : "");
2312         ZOOM_connection_option_set(c, "targetImplementationVersion",
2313                                    initrs->implementationVersion ?
2314                                    initrs->implementationVersion : "");
2315         if (!*initrs->result)
2316         {
2317             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2318         }
2319         else
2320         {
2321             char *cookie =
2322                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2323                                           VAL_COOKIE, 1, 0);
2324             xfree (c->cookie_in);
2325             c->cookie_in = 0;
2326             if (cookie)
2327                 c->cookie_in = xstrdup(cookie);
2328             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2329                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2330                 c->support_named_resultsets = 1;
2331             if (c->tasks)
2332             {
2333                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2334                 ZOOM_connection_remove_task (c);
2335             }
2336             ZOOM_connection_exec_task (c);
2337         }
2338         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2339         {
2340             NMEM tmpmem = nmem_create();
2341             Z_CharSetandLanguageNegotiation *p =
2342                 yaz_get_charneg_record(initrs->otherInfo);
2343
2344             if (p)
2345             {
2346                 char *charset=NULL, *lang=NULL;
2347                 int sel;
2348
2349                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2350                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2351                         "language %s, select %d",
2352                         charset ? charset : "none", lang ? lang : "none", sel);
2353                 if (charset)
2354                     ZOOM_connection_option_set (c, "negotiation-charset",
2355                                                 charset);
2356                 if (lang)
2357                     ZOOM_connection_option_set (c, "negotiation-lang",
2358                                                 lang);
2359                 nmem_destroy(tmpmem);
2360             }
2361         }
2362         break;
2363     case Z_APDU_searchResponse:
2364         handle_search_response (c, apdu->u.searchResponse);
2365         if (send_sort_present (c) == zoom_complete)
2366             ZOOM_connection_remove_task (c);
2367         break;
2368     case Z_APDU_presentResponse:
2369         handle_present_response (c, apdu->u.presentResponse);
2370         if (send_present (c) == zoom_complete)
2371             ZOOM_connection_remove_task (c);
2372         break;
2373     case Z_APDU_sortResponse:
2374         sort_response (c, apdu->u.sortResponse);
2375         if (send_present (c) == zoom_complete)
2376             ZOOM_connection_remove_task (c);
2377         break;
2378     case Z_APDU_scanResponse:
2379         scan_response (c, apdu->u.scanResponse);
2380         ZOOM_connection_remove_task (c);
2381         break;
2382     case Z_APDU_extendedServicesResponse:
2383         es_response (c, apdu->u.extendedServicesResponse);
2384         ZOOM_connection_remove_task (c);
2385         break;
2386     case Z_APDU_close:
2387         if (c->reconnect_ok)
2388         {
2389             do_close(c);
2390             c->tasks->running = 0;
2391             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2392         }
2393         else
2394         {
2395             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2396             do_close(c);
2397         }
2398         break;
2399     default:
2400         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2401         do_close(c);
2402     }
2403 }
2404
2405 #if HAVE_XML2
2406 static void handle_srw_response(ZOOM_connection c,
2407                                 Z_SRW_searchRetrieveResponse *res)
2408 {
2409     ZOOM_resultset resultset = 0;
2410     int i;
2411     NMEM nmem;
2412
2413     if (!c->tasks)
2414         return;
2415
2416     if (c->tasks->which == ZOOM_TASK_SEARCH)
2417         resultset = c->tasks->u.search.resultset;
2418     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2419         resultset = c->tasks->u.retrieve.resultset;
2420     else
2421         return ;
2422
2423     resultset->size = 0;
2424
2425     yaz_log(LOG_DEBUG, "got SRW response OK");
2426
2427     if (res->numberOfRecords)
2428         resultset->size = *res->numberOfRecords;
2429
2430     for (i = 0; i<res->num_records; i++)
2431     {
2432         int pos;
2433
2434         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2435             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2436
2437         if (res->records[i].recordPosition &&
2438             *res->records[i].recordPosition > 0)
2439             pos = *res->records[i].recordPosition - 1;
2440         else
2441             pos = resultset->start + i;
2442
2443         npr->databaseName = 0;
2444         npr->which = Z_NamePlusRecord_databaseRecord;
2445         npr->u.databaseRecord = (Z_External *)
2446             odr_malloc(c->odr_in, sizeof(Z_External));
2447         npr->u.databaseRecord->descriptor = 0;
2448         npr->u.databaseRecord->direct_reference =
2449             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2450         npr->u.databaseRecord->which = Z_External_octet;
2451         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2452             odr_malloc(c->odr_in, sizeof(Odr_oct));
2453         npr->u.databaseRecord->u.octet_aligned->buf =
2454             res->records[i].recordData_buf;
2455         npr->u.databaseRecord->u.octet_aligned->len =
2456             npr->u.databaseRecord->u.octet_aligned->size =
2457             res->records[i].recordData_len;
2458         record_cache_add (resultset, npr, pos);
2459     }
2460     if (res->num_diagnostics > 0)
2461     {
2462         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2463                        res->diagnostics[0].details, 0);
2464     }
2465     nmem = odr_extract_mem(c->odr_in);
2466     nmem_transfer(resultset->odr->mem, nmem);
2467     nmem_destroy(nmem);
2468 }
2469 #endif
2470
2471 #if HAVE_XML2
2472 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2473 {
2474     int ret = -1;
2475     const char *content_type = z_HTTP_header_lookup(hres->headers,
2476                                                     "Content-Type");
2477     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2478                                                        "Connection");
2479     c->mask = 0;
2480     yaz_log (LOG_DEBUG, "handle_http");
2481
2482     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2483     {
2484         Z_SOAP *soap_package = 0;
2485         ODR o = odr_createmem(ODR_DECODE);
2486         Z_SOAP_Handler soap_handlers[2] = {
2487             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2488              (Z_SOAP_fun) yaz_srw_codec},
2489             {0, 0, 0}
2490         };
2491         ret = z_soap_codec(o, &soap_package,
2492                            &hres->content_buf, &hres->content_len,
2493                            soap_handlers);
2494         if (!ret && soap_package->which == Z_SOAP_generic &&
2495             soap_package->u.generic->no == 0)
2496         {
2497             Z_SRW_PDU *sr = soap_package->u.generic->p;
2498             if (sr->which == Z_SRW_searchRetrieve_response)
2499                 handle_srw_response(c, sr->u.response);
2500             else
2501                 ret = -1;
2502         }
2503         else if (!ret && (soap_package->which == Z_SOAP_fault
2504                           || soap_package->which == Z_SOAP_error))
2505         {
2506             set_HTTP_error(c, hres->code,
2507                            soap_package->u.fault->fault_code,
2508                            soap_package->u.fault->fault_string);
2509         }
2510         else
2511             ret = -1;
2512         odr_destroy(o);
2513     }
2514     if (ret)
2515     {
2516         if (hres->code != 200)
2517             set_HTTP_error(c, hres->code, 0, 0);
2518         else
2519             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2520         do_close (c);
2521     }
2522     ZOOM_connection_remove_task(c);
2523     if (!strcmp(hres->version, "1.0"))
2524     {
2525         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2526         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2527             do_close(c);
2528     }
2529     else
2530     {
2531         /* HTTP 1.1: only if no close we stay alive .. */
2532         if (connection_head && !strcmp(connection_head, "close"))
2533             do_close(c);
2534     }
2535 }
2536 #endif
2537
2538 static int do_read (ZOOM_connection c)
2539 {
2540     int r;
2541     ZOOM_Event event;
2542
2543     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2544     ZOOM_connection_put_event (c, event);
2545
2546     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2547
2548     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2549     if (r == 1)
2550         return 0;
2551     if (r <= 0)
2552     {
2553         if (c->reconnect_ok)
2554         {
2555             do_close (c);
2556             c->reconnect_ok = 0;
2557             yaz_log (LOG_DEBUG, "reconnect read");
2558             c->tasks->running = 0;
2559             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2560         }
2561         else
2562         {
2563             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2564             do_close (c);
2565         }
2566     }
2567     else
2568     {
2569         Z_GDU *gdu;
2570         ZOOM_Event event;
2571         odr_reset (c->odr_in);
2572         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2573         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2574         ZOOM_connection_put_event (c, event);
2575
2576         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2577         {
2578             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2579             do_close (c);
2580         }
2581         else if (gdu->which == Z_GDU_Z3950)
2582             handle_apdu (c, gdu->u.z3950);
2583         else if (gdu->which == Z_GDU_HTTP_Response)
2584         {
2585 #if HAVE_XML2
2586             handle_http (c, gdu->u.HTTP_Response);
2587 #else
2588             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2589             do_close (c);
2590 #endif
2591         }
2592         c->reconnect_ok = 0;
2593     }
2594     return 1;
2595 }
2596
2597 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2598 {
2599     int r;
2600     ZOOM_Event event;
2601
2602     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2603     ZOOM_connection_put_event (c, event);
2604
2605     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2606     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2607     {
2608         if (c->reconnect_ok)
2609         {
2610             do_close (c);
2611             c->reconnect_ok = 0;
2612             yaz_log (LOG_DEBUG, "reconnect write");
2613             c->tasks->running = 0;
2614             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2615             return zoom_pending;
2616         }
2617         if (c->state == STATE_CONNECTING)
2618             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2619         else
2620             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2621         do_close (c);
2622         return zoom_complete;
2623     }
2624     else if (r == 1)
2625     {
2626         c->mask = ZOOM_SELECT_EXCEPT;
2627         if (c->cs->io_pending & CS_WANT_WRITE)
2628             c->mask += ZOOM_SELECT_WRITE;
2629         if (c->cs->io_pending & CS_WANT_READ)
2630             c->mask += ZOOM_SELECT_READ;
2631         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2632     }
2633     else
2634     {
2635         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2636         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2637     }
2638     return zoom_pending;
2639 }
2640
2641 static zoom_ret do_write(ZOOM_connection c)
2642 {
2643     return do_write_ex (c, c->buf_out, c->len_out);
2644 }
2645
2646
2647 ZOOM_API(const char *)
2648 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2649 {
2650     return ZOOM_options_get (c->options, key);
2651 }
2652
2653 ZOOM_API(void)
2654 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2655                                   const char *val)
2656 {
2657     ZOOM_options_set (c->options, key, val);
2658 }
2659
2660 ZOOM_API(const char *)
2661 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2662 {
2663     return ZOOM_options_get (r->options, key);
2664 }
2665
2666 ZOOM_API(void)
2667 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2668                                   const char *val)
2669 {
2670     ZOOM_options_set (r->options, key, val);
2671 }
2672
2673
2674 ZOOM_API(int)
2675 ZOOM_connection_errcode (ZOOM_connection c)
2676 {
2677     return ZOOM_connection_error (c, 0, 0);
2678 }
2679
2680 ZOOM_API(const char *)
2681 ZOOM_connection_errmsg (ZOOM_connection c)
2682 {
2683     const char *msg;
2684     ZOOM_connection_error (c, &msg, 0);
2685     return msg;
2686 }
2687
2688 ZOOM_API(const char *)
2689 ZOOM_connection_addinfo (ZOOM_connection c)
2690 {
2691     const char *addinfo;
2692     ZOOM_connection_error (c, 0, &addinfo);
2693     return addinfo;
2694 }
2695
2696 ZOOM_API(const char *)
2697 ZOOM_diag_str (int error)
2698 {
2699     switch (error)
2700     {
2701     case ZOOM_ERROR_NONE:
2702         return "No error";
2703     case ZOOM_ERROR_CONNECT:
2704         return "Connect failed";
2705     case ZOOM_ERROR_MEMORY:
2706         return "Out of memory";
2707     case ZOOM_ERROR_ENCODE:
2708         return "Encoding failed";
2709     case ZOOM_ERROR_DECODE:
2710         return "Decoding failed";
2711     case ZOOM_ERROR_CONNECTION_LOST:
2712         return "Connection lost";
2713     case ZOOM_ERROR_INIT:
2714         return "Init rejected";
2715     case ZOOM_ERROR_INTERNAL:
2716         return "Internal failure";
2717     case ZOOM_ERROR_TIMEOUT:
2718         return "Timeout";
2719     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2720         return "Unsupported protocol";
2721     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2722         return "Unsupported query type";
2723     default:
2724         return diagbib1_str (error);
2725     }
2726 }
2727
2728 ZOOM_API(int)
2729 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2730                          const char **addinfo, const char **diagset)
2731 {
2732     int error = c->error;
2733     if (cp)
2734     {
2735         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2736             *cp = ZOOM_diag_str(error);
2737         else if (!strcmp(c->diagset, "HTTP"))
2738             *cp = z_HTTP_errmsg(c->error);
2739         else if (!strcmp(c->diagset, "Bib-1"))
2740             *cp = ZOOM_diag_str(error);
2741         else if (!strcmp(c->diagset, "SRW"))
2742             *cp = yaz_diag_srw_str(c->error);
2743         else
2744             *cp = "Unknown error and diagnostic set";
2745     }
2746     if (addinfo)
2747         *addinfo = c->addinfo ? c->addinfo : "";
2748     if (diagset)
2749         *diagset = c->diagset ? c->diagset : "";
2750     return c->error;
2751 }
2752
2753 ZOOM_API(int)
2754 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2755                        const char **addinfo)
2756 {
2757     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2758 }
2759
2760 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2761 {
2762     ZOOM_Event event = 0;
2763     int r = cs_look(c->cs);
2764     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2765              c, mask, r);
2766
2767     if (r == CS_NONE)
2768     {
2769         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2770         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2771         do_close (c);
2772         ZOOM_connection_put_event (c, event);
2773     }
2774     else if (r == CS_CONNECT)
2775     {
2776         int ret;
2777         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2778
2779         ret = cs_rcvconnect (c->cs);
2780         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2781         if (ret == 1)
2782         {
2783             c->mask = ZOOM_SELECT_EXCEPT;
2784             if (c->cs->io_pending & CS_WANT_WRITE)
2785                 c->mask += ZOOM_SELECT_WRITE;
2786             if (c->cs->io_pending & CS_WANT_READ)
2787                 c->mask += ZOOM_SELECT_READ;
2788             ZOOM_connection_put_event (c, event);
2789         }
2790         else if (ret == 0)
2791         {
2792             ZOOM_connection_put_event (c, event);
2793             if (c->proto == PROTO_Z3950)
2794                 ZOOM_connection_send_init(c);
2795             else
2796             {
2797                 /* no init request for SRW .. */
2798                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2799                 ZOOM_connection_remove_task (c);
2800                 c->mask = 0;
2801                 ZOOM_connection_exec_task (c);
2802             }
2803             c->state = STATE_ESTABLISHED;
2804         }
2805         else
2806         {
2807             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2808             do_close (c);
2809             ZOOM_connection_put_event (c, event);
2810         }
2811     }
2812     else
2813     {
2814         if (mask & ZOOM_SELECT_READ)
2815             do_read (c);
2816         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2817             do_write (c);
2818     }
2819     return 1;
2820 }
2821
2822 ZOOM_API(int)
2823 ZOOM_connection_last_event(ZOOM_connection cs)
2824 {
2825     if (!cs)
2826         return ZOOM_EVENT_NONE;
2827     return cs->last_event;
2828 }
2829
2830 ZOOM_API(int)
2831 ZOOM_event (int no, ZOOM_connection *cs)
2832 {
2833     int timeout = 5000;
2834 #if HAVE_SYS_POLL_H
2835     struct pollfd pollfds[1024];
2836     ZOOM_connection poll_cs[1024];
2837 #else
2838     struct timeval tv;
2839     fd_set input, output, except;
2840 #endif
2841     int i, r, nfds;
2842     int max_fd = 0;
2843
2844     for (i = 0; i<no; i++)
2845     {
2846         ZOOM_connection c = cs[i];
2847         ZOOM_Event event;
2848         if (c && (event = ZOOM_connection_get_event(c)))
2849         {
2850             ZOOM_Event_destroy (event);
2851             return i+1;
2852         }
2853     }
2854     for (i = 0; i<no; i++)
2855     {
2856         ZOOM_connection c = cs[i];
2857         ZOOM_Event event;
2858         if (c && ZOOM_connection_exec_task (c))
2859         {
2860             if ((event = ZOOM_connection_get_event(c)))
2861             {
2862                 ZOOM_Event_destroy (event);
2863                 return i+1;
2864             }
2865         }
2866     }
2867 #if HAVE_SYS_POLL_H
2868
2869 #else
2870     FD_ZERO (&input);
2871     FD_ZERO (&output);
2872     FD_ZERO (&except);
2873 #endif
2874     nfds = 0;
2875     for (i = 0; i<no; i++)
2876     {
2877         ZOOM_connection c = cs[i];
2878         int fd, mask;
2879         int this_timeout;
2880
2881         if (!c)
2882             continue;
2883         fd = z3950_connection_socket(c);
2884         mask = z3950_connection_mask(c);
2885
2886         if (fd == -1)
2887             continue;
2888         if (max_fd < fd)
2889             max_fd = fd;
2890
2891         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2892         if (this_timeout != -1 && this_timeout < timeout)
2893             timeout = this_timeout;
2894 #if HAVE_SYS_POLL_H
2895         if (mask)
2896         {
2897             short poll_events = 0;
2898
2899             if (mask & ZOOM_SELECT_READ)
2900                 poll_events += POLLIN;
2901             if (mask & ZOOM_SELECT_WRITE)
2902                 poll_events += POLLOUT;
2903             if (mask & ZOOM_SELECT_EXCEPT)
2904                 poll_events += POLLERR;
2905             pollfds[nfds].fd = fd;
2906             pollfds[nfds].events = poll_events;
2907             pollfds[nfds].revents = 0;
2908             poll_cs[nfds] = c;
2909             nfds++;
2910         }
2911 #else
2912         if (mask & ZOOM_SELECT_READ)
2913         {
2914             FD_SET (fd, &input);
2915             nfds++;
2916         }
2917         if (mask & ZOOM_SELECT_WRITE)
2918         {
2919             FD_SET (fd, &output);
2920             nfds++;
2921         }
2922         if (mask & ZOOM_SELECT_EXCEPT)
2923         {
2924             FD_SET (fd, &except);
2925             nfds++;
2926         }
2927 #endif
2928     }
2929     if (timeout >= 5000)
2930         timeout = 30;
2931
2932     if (!nfds)
2933         return 0;
2934
2935 #if HAVE_SYS_POLL_H
2936     r = poll (pollfds, nfds, timeout * 1000);
2937     for (i = 0; i<nfds; i++)
2938     {
2939         ZOOM_connection c = poll_cs[i];
2940         if (r && c->mask)
2941         {
2942             int mask = 0;
2943             if (pollfds[i].revents & POLLIN)
2944                 mask += ZOOM_SELECT_READ;
2945             if (pollfds[i].revents & POLLOUT)
2946                 mask += ZOOM_SELECT_WRITE;
2947             if (pollfds[i].revents & POLLERR)
2948                 mask += ZOOM_SELECT_EXCEPT;
2949             if (mask)
2950                 ZOOM_connection_do_io(c, mask);
2951         }
2952         else if (r == 0 && c->mask)
2953         {
2954             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2955             /* timeout and this connection was waiting */
2956             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2957             do_close (c);
2958             ZOOM_connection_put_event(c, event);
2959         }
2960     }
2961 #else
2962     tv.tv_sec = timeout;
2963     tv.tv_usec = 0;
2964     yaz_log (LOG_DEBUG, "select start");
2965     r = select (max_fd+1, &input, &output, &except, &tv);
2966     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2967     for (i = 0; i<no; i++)
2968     {
2969         ZOOM_connection c = cs[i];
2970         int fd, mask;
2971
2972         if (!c)
2973             continue;
2974         fd = z3950_connection_socket(c);
2975         mask = 0;
2976         if (r && c->mask)
2977         {
2978             /* no timeout and real socket */
2979             if (FD_ISSET(fd, &input))
2980                 mask += ZOOM_SELECT_READ;
2981             if (FD_ISSET(fd, &output))
2982                 mask += ZOOM_SELECT_WRITE;
2983             if (FD_ISSET(fd, &except))
2984                 mask += ZOOM_SELECT_EXCEPT;
2985             if (mask)
2986                 ZOOM_connection_do_io(c, mask);
2987         }
2988         if (r == 0 && c->mask)
2989         {
2990             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2991             /* timeout and this connection was waiting */
2992             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2993             do_close (c);
2994             yaz_log (LOG_DEBUG, "timeout");
2995             ZOOM_connection_put_event(c, event);
2996         }
2997     }
2998 #endif
2999     for (i = 0; i<no; i++)
3000     {
3001         ZOOM_connection c = cs[i];
3002         ZOOM_Event event;
3003         if (c && (event = ZOOM_connection_get_event(c)))
3004         {
3005             ZOOM_Event_destroy (event);
3006             return i+1;
3007         }
3008     }
3009     return 0;
3010 }