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 1.31 2003-04-23 20:38:19 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 = xmalloc(strlen(path)+2);
 726         c->path[0] = '/';
 727         strcpy (c->path+1, path);
 728 #else
 729         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 730         do_close(c);
 731         return zoom_complete;
 732 #endif
 733     }
 734     if (c->cs)
 735     {
 736         int ret = cs_connect (c->cs, add);
 737         if (ret == 0)
 738         {
 739             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 740             ZOOM_connection_put_event(c, event);
 741             if (c->proto == PROTO_Z3950)
 742                 ZOOM_connection_send_init(c);
 743             else
 744             {
 745                 /* no init request for SRW .. */
 746                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 747                 ZOOM_connection_remove_task (c);
 748                 c->mask = 0;
 749                 ZOOM_connection_exec_task (c);
 750             }
 751             c->state = STATE_ESTABLISHED;
 752             return zoom_pending;
 753         }
 754         else if (ret > 0)
 755         {
 756             c->state = STATE_CONNECTING;
 757             c->mask = ZOOM_SELECT_EXCEPT;
 758             if (c->cs->io_pending & CS_WANT_WRITE)
 759                 c->mask += ZOOM_SELECT_WRITE;
 760             if (c->cs->io_pending & CS_WANT_READ)
 761                 c->mask += ZOOM_SELECT_READ;
 762             return zoom_pending;
 763         }
 764     }
 765     c->state = STATE_IDLE;
 766     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 767     return zoom_complete;
 768 }
 769
 770 int z3950_connection_socket(ZOOM_connection c)
 771 {
 772     if (c->cs)
 773         return cs_fileno(c->cs);
 774     return -1;
 775 }
 776
 777 int z3950_connection_mask(ZOOM_connection c)
 778 {
 779     if (c->cs)
 780         return c->mask;
 781     return 0;
 782 }
 783
 784 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 785 {
 786     int i;
 787     for (i = 0; i<200; i++)
 788     {
 789         size_t len;
 790         Z_OtherInformation **oi;
 791         char buf[80];
 792         const char *val;
 793         const char *cp;
 794         int oidval;
 795
 796         sprintf (buf, "otherInfo%d", i);
 797         val = ZOOM_options_get (c->options, buf);
 798         if (!val)
 799             break;
 800         cp = strchr (val, ':');
 801         if (!cp)
 802             continue;
 803         len = cp - val;
 804         if (len >= sizeof(buf))
 805             len = sizeof(buf)-1;
 806         memcpy (buf, val, len);
 807         buf[len] = '\0';
 808         oidval = oid_getvalbyname (buf);
 809         if (oidval == VAL_NONE)
 810             continue;
 811
 812         yaz_oi_APDU(a, &oi);
 813         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 814     }
 815 }
 816
 817 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 818 {
 819     assert (a);
 820     if (c->cookie_out)
 821     {
 822         Z_OtherInformation **oi;
 823         yaz_oi_APDU(a, &oi);
 824         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 825     }
 826     if (c->client_IP)
 827     {
 828         Z_OtherInformation **oi;
 829         yaz_oi_APDU(a, &oi);
 830         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 831     }
 832     otherInfo_attach (c, a, out);
 833     if (!z_APDU(out, &a, 0, 0))
 834     {
 835         FILE *outf = fopen("/tmp/apdu.txt", "a");
 836         if (a && outf)
 837         {
 838             ODR odr_pr = odr_createmem(ODR_PRINT);
 839             fprintf (outf, "a=%p\n", a);
 840             odr_setprint(odr_pr, outf);
 841             z_APDU(odr_pr, &a, 0, 0);
 842             odr_destroy(odr_pr);
 843         }
 844         yaz_log (LOG_DEBUG, "encoding failed");
 845         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 846         odr_reset(out);
 847         return -1;
 848     }
 849
 850     return 0;
 851 }
 852
 853 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 854 {
 855     ZOOM_Event event;
 856     assert (a);
 857     if (encode_APDU(c, a, c->odr_out))
 858         return zoom_complete;
 859     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 860     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 861     ZOOM_connection_put_event (c, event);
 862     odr_reset(c->odr_out);
 863     return do_write (c);
 864 }
 865
 866 /* returns 1 if PDU was sent OK (still pending )
 867            0 if PDU was not sent OK (nothing to wait for)
 868 */
 869
 870 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 871 {
 872     const char *impname;
 873     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 874     Z_InitRequest *ireq = apdu->u.initRequest;
 875     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 876         odr_malloc(c->odr_out, sizeof(*auth));
 877     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 878     const char *auth_userId = ZOOM_options_get (c->options, "user");
 879     const char *auth_password = ZOOM_options_get (c->options, "pass");
 880
 881     ODR_MASK_SET(ireq->options, Z_Options_search);
 882     ODR_MASK_SET(ireq->options, Z_Options_present);
 883     ODR_MASK_SET(ireq->options, Z_Options_scan);
 884     ODR_MASK_SET(ireq->options, Z_Options_sort);
 885     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 886     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 887
 888     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 889     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 890     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 891
 892     impname = ZOOM_options_get (c->options, "implementationName");
 893     ireq->implementationName =
 894         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 895     strcpy (ireq->implementationName, "");
 896     if (impname)
 897     {
 898         strcat (ireq->implementationName, impname);
 899         strcat (ireq->implementationName, "/");
 900     }
 901     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 902
 903     *ireq->maximumRecordSize =
 904         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 905     *ireq->preferredMessageSize =
 906         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 907
 908     if (auth_groupId || auth_password)
 909     {
 910         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 911         int i = 0;
 912         pass->groupId = 0;
 913         if (auth_groupId && *auth_groupId)
 914         {
 915             pass->groupId = (char *)
 916                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 917             strcpy(pass->groupId, auth_groupId);
 918             i++;
 919         }
 920         pass->userId = 0;
 921         if (auth_userId && *auth_userId)
 922         {
 923             pass->userId = (char *)
 924                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 925             strcpy(pass->userId, auth_userId);
 926             i++;
 927         }
 928         pass->password = 0;
 929         if (auth_password && *auth_password)
 930         {
 931             pass->password = (char *)
 932                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 933             strcpy(pass->password, auth_password);
 934             i++;
 935         }
 936         if (i)
 937         {
 938             auth->which = Z_IdAuthentication_idPass;
 939             auth->u.idPass = pass;
 940             ireq->idAuthentication = auth;
 941         }
 942     }
 943     else if (auth_userId)
 944     {
 945         auth->which = Z_IdAuthentication_open;
 946         auth->u.open = (char *)
 947             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 948         strcpy(auth->u.open, auth_userId);
 949         ireq->idAuthentication = auth;
 950     }
 951     if (c->proxy)
 952         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 953                                  VAL_PROXY, 1, c->host_port);
 954     if (c->charset||c->lang)
 955     {
 956         Z_OtherInformation **oi;
 957         Z_OtherInformationUnit *oi_unit;
 958
 959         yaz_oi_APDU(apdu, &oi);
 960
 961         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 962         {
 963             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 964
 965             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 966             oi_unit->information.externallyDefinedInfo =
 967                 yaz_set_proposal_charneg
 968                 (c->odr_out,
 969                  (const char **)&c->charset, (c->charset) ? 1:0,
 970                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 971         }
 972     }
 973     assert (apdu);
 974     return send_APDU (c, apdu);
 975 }
 976
 977 #if HAVE_XML2
 978 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
 979 {
 980     char ctype[50];
 981     Z_SOAP_Handler h[2] = {
 982         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 983         {0, 0, 0}
 984     };
 985     ODR o = odr_createmem(ODR_ENCODE);
 986     int ret;
 987     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 988     Z_GDU *gdu;
 989     ZOOM_Event event;
 990
 991     gdu = z_get_HTTP_Request(c->odr_out);
 992     gdu->u.HTTP_Request->path = c->path;
 993
 994     if (c->host_port)
 995     {
 996         const char *cp0 = strstr(c->host_port, "://");
 997         const char *cp1 = 0;
 998         if (cp0)
 999             cp0 = cp0+3;
1000         else
1001             cp0 = c->host_port;
1002
1003         cp1 = strchr(cp0, '/');
1004         if (!cp1)
1005             cp1 = cp0+strlen(cp0);
1006
1007         if (cp0 && cp1)
1008         {
1009             char *h = odr_malloc(c->odr_out, cp1 - cp0 + 1);
1010             memcpy (h, cp0, cp1 - cp0);
1011             h[cp1-cp0] = '\0';
1012             z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1013                               "host", h);
1014         }
1015     }
1016
1017     strcpy(ctype, "text/xml");
1018     if (c->charset && strlen(c->charset) < 20)
1019     {
1020         strcat(ctype, "; charset=");
1021         strcat(ctype, c->charset);
1022     }
1023     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1024                       "Content-Type", ctype);
1025     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1026                       "SOAPAction", "\"\"");
1027     p->which = Z_SOAP_generic;
1028     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1029     p->u.generic->no = 0;
1030     p->u.generic->ns = 0;
1031     p->u.generic->p = sr;
1032     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1033
1034     ret = z_soap_codec_enc(o, &p,
1035                            &gdu->u.HTTP_Request->content_buf,
1036                            &gdu->u.HTTP_Request->content_len, h,
1037                            c->charset);
1038
1039     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1040         return zoom_complete;
1041     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1042
1043     odr_destroy(o);
1044
1045     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1046     ZOOM_connection_put_event (c, event);
1047     odr_reset(c->odr_out);
1048     return do_write (c);
1049 }
1050 #endif
1051
1052 #if HAVE_XML2
1053 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1054 {
1055     int i;
1056     ZOOM_resultset resultset = 0;
1057     Z_SRW_PDU *sr = 0;
1058     const char *recordPacking = 0;
1059
1060     if (c->error)                  /* don't continue on error */
1061         return zoom_complete;
1062     assert (c->tasks);
1063     if (c->tasks->which == ZOOM_TASK_SEARCH)
1064     {
1065         resultset = c->tasks->u.search.resultset;
1066         resultset->setname = xstrdup ("default");
1067         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1068     }
1069     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1070     {
1071         resultset = c->tasks->u.retrieve.resultset;
1072
1073         resultset->start = c->tasks->u.retrieve.start;
1074         resultset->count = c->tasks->u.retrieve.count;
1075
1076         if (resultset->start >= resultset->size)
1077             return zoom_complete;
1078         if (resultset->start + resultset->count > resultset->size)
1079             resultset->count = resultset->size - resultset->start;
1080
1081         for (i = 0; i<resultset->count; i++)
1082         {
1083             ZOOM_record rec =
1084                 record_cache_lookup (resultset, i + resultset->start);
1085             if (!rec)
1086                 break;
1087         }
1088         if (i == resultset->count)
1089             return zoom_complete;
1090     }
1091     assert(resultset->query);
1092
1093     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1094
1095     if (resultset->query->z_query->which == Z_Query_type_104
1096         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1097     {
1098
1099         sr->u.request->query_type = Z_SRW_query_type_cql;
1100         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1101     }
1102     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1103              resultset->query->z_query->u.type_1)
1104     {
1105         sr->u.request->query_type = Z_SRW_query_type_pqf;
1106         sr->u.request->query.pqf = resultset->query->query_string;
1107     }
1108     else
1109     {
1110         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1111         return zoom_complete;
1112     }
1113     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1114     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1115     sr->u.request->recordSchema = resultset->schema;
1116
1117     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1118
1119     if (recordPacking)
1120         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1121
1122     return send_srw(c, sr);
1123 }
1124 #else
1125 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1126 {
1127     return zoom_complete;
1128 }
1129 #endif
1130
1131 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1132 {
1133     ZOOM_resultset r;
1134     int lslb, ssub, mspn;
1135     const char *syntax;
1136     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1137     Z_SearchRequest *search_req = apdu->u.searchRequest;
1138     const char *elementSetName;
1139     const char *smallSetElementSetName;
1140     const char *mediumSetElementSetName;
1141
1142     assert (c->tasks);
1143     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1144
1145     r = c->tasks->u.search.resultset;
1146
1147     elementSetName =
1148         ZOOM_options_get (r->options, "elementSetName");
1149     smallSetElementSetName  =
1150         ZOOM_options_get (r->options, "smallSetElementSetName");
1151     mediumSetElementSetName =
1152         ZOOM_options_get (r->options, "mediumSetElementSetName");
1153
1154     if (!smallSetElementSetName)
1155         smallSetElementSetName = elementSetName;
1156
1157     if (!mediumSetElementSetName)
1158         mediumSetElementSetName = elementSetName;
1159
1160     assert (r);
1161     assert (r->query);
1162
1163     /* prepare query for the search request */
1164     search_req->query = r->query->z_query;
1165
1166     search_req->databaseNames =
1167         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1168
1169     /* get syntax (no need to provide unless piggyback is in effect) */
1170     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1171
1172     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1173     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1174     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1175     if (lslb != -1 && ssub != -1 && mspn != -1)
1176     {
1177         /* So're a Z39.50 expert? Let's hope you don't do sort */
1178         *search_req->largeSetLowerBound = lslb;
1179         *search_req->smallSetUpperBound = ssub;
1180         *search_req->mediumSetPresentNumber = mspn;
1181     }
1182     else if (r->start == 0 && r->count > 0
1183              && r->piggyback && !r->r_sort_spec && !r->schema)
1184     {
1185         /* Regular piggyback - do it unless we're going to do sort */
1186         *search_req->largeSetLowerBound = 2000000000;
1187         *search_req->smallSetUpperBound = 0;
1188         *search_req->mediumSetPresentNumber = r->count;
1189         smallSetElementSetName = 0;
1190     }
1191     else
1192     {
1193         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1194         smallSetElementSetName = 0;
1195         mediumSetElementSetName = 0;
1196         syntax = 0;
1197     }
1198     if (smallSetElementSetName && *smallSetElementSetName)
1199     {
1200         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1201             odr_malloc (c->odr_out, sizeof(*esn));
1202
1203         esn->which = Z_ElementSetNames_generic;
1204         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1205         search_req->smallSetElementSetNames = esn;
1206     }
1207     if (mediumSetElementSetName && *mediumSetElementSetName)
1208     {
1209         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1210             odr_malloc (c->odr_out, sizeof(*esn));
1211
1212         esn->which = Z_ElementSetNames_generic;
1213         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1214         search_req->mediumSetElementSetNames = esn;
1215     }
1216     if (syntax)
1217         search_req->preferredRecordSyntax =
1218             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1219
1220     if (!r->setname)
1221     {
1222         if (c->support_named_resultsets)
1223         {
1224             char setname[14];
1225             int ord;
1226             /* find the lowest unused ordinal so that we re-use
1227                result sets on the server. */
1228             for (ord = 1; ; ord++)
1229             {
1230                 ZOOM_resultset rp;
1231                 sprintf (setname, "%d", ord);
1232                 for (rp = c->resultsets; rp; rp = rp->next)
1233                     if (rp->setname && !strcmp (rp->setname, setname))
1234                         break;
1235                 if (!rp)
1236                     break;
1237             }
1238             r->setname = xstrdup (setname);
1239             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1240         }
1241         else
1242             r->setname = xstrdup ("default");
1243         ZOOM_options_set (r->options, "setname", r->setname);
1244     }
1245     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1246     /* send search request */
1247     return send_APDU (c, apdu);
1248 }
1249
1250 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1251 {
1252     int oclass;
1253     Z_DefaultDiagFormat *r;
1254     char *addinfo = 0;
1255
1256     xfree (c->addinfo);
1257     c->addinfo = 0;
1258     if (p->which != Z_DiagRec_defaultFormat)
1259     {
1260         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1261         return;
1262     }
1263     r = p->u.defaultFormat;
1264     switch (r->which)
1265     {
1266     case Z_DefaultDiagFormat_v2Addinfo:
1267         addinfo = r->u.v2Addinfo;
1268         break;
1269     case Z_DefaultDiagFormat_v3Addinfo:
1270         addinfo = r->u.v3Addinfo;
1271         break;
1272     }
1273     set_dset_error(c, *r->condition,
1274                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1275                    addinfo, 0);
1276 }
1277
1278 ZOOM_API(ZOOM_record)
1279 ZOOM_record_clone (ZOOM_record srec)
1280 {
1281     char *buf;
1282     int size;
1283     ODR odr_enc;
1284     ZOOM_record nrec;
1285
1286     odr_enc = odr_createmem(ODR_ENCODE);
1287     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1288         return 0;
1289     buf = odr_getbuf (odr_enc, &size, 0);
1290
1291     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1292     nrec->odr = odr_createmem(ODR_DECODE);
1293     nrec->wrbuf_marc = 0;
1294     odr_setbuf (nrec->odr, buf, size, 0);
1295     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1296
1297     odr_destroy (odr_enc);
1298     return nrec;
1299 }
1300
1301 ZOOM_API(ZOOM_record)
1302 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1303 {
1304     return record_cache_lookup (s, pos);
1305 }
1306
1307 ZOOM_API(ZOOM_record)
1308 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1309 {
1310     ZOOM_resultset_retrieve (r, 1, pos, 1);
1311     return ZOOM_resultset_record_immediate (r, pos);
1312 }
1313
1314 ZOOM_API(void)
1315 ZOOM_record_destroy (ZOOM_record rec)
1316 {
1317     if (!rec)
1318         return;
1319     if (rec->wrbuf_marc)
1320         wrbuf_free (rec->wrbuf_marc, 1);
1321     odr_destroy (rec->odr);
1322     xfree (rec);
1323 }
1324
1325 ZOOM_API(const char *)
1326 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1327 {
1328     Z_NamePlusRecord *npr;
1329
1330     if (len)
1331         *len = 0; /* default return */
1332
1333     if (!rec)
1334         return 0;
1335     npr = rec->npr;
1336     if (!npr)
1337         return 0;
1338     if (!strcmp (type, "database"))
1339     {
1340         if (len)
1341             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1342         return npr->databaseName;
1343     }
1344     else if (!strcmp (type, "syntax"))
1345     {
1346         const char *desc = 0;
1347         if (npr->which == Z_NamePlusRecord_databaseRecord)
1348         {
1349             Z_External *r = (Z_External *) npr->u.databaseRecord;
1350             oident *ent = oid_getentbyoid(r->direct_reference);
1351             if (ent)
1352                 desc = ent->desc;
1353         }
1354         if (!desc)
1355             desc = "none";
1356         if (len)
1357             *len = strlen(desc);
1358         return desc;
1359     }
1360     else if (!strcmp (type, "render") &&
1361              npr->which == Z_NamePlusRecord_databaseRecord)
1362     {
1363         Z_External *r = (Z_External *) npr->u.databaseRecord;
1364         oident *ent = oid_getentbyoid(r->direct_reference);
1365
1366         if (r->which == Z_External_sutrs)
1367         {
1368             if (len) *len = r->u.sutrs->len;
1369             return (const char *) r->u.sutrs->buf;
1370         }
1371         else if (r->which == Z_External_octet)
1372         {
1373             yaz_marc_t mt;
1374             switch (ent->value)
1375             {
1376             case VAL_SOIF:
1377             case VAL_HTML:
1378             case VAL_SUTRS:
1379                 break;
1380             case VAL_TEXT_XML:
1381             case VAL_APPLICATION_XML:
1382                 break;
1383             default:
1384                 if (!rec->wrbuf_marc)
1385                     rec->wrbuf_marc = wrbuf_alloc();
1386
1387                 mt = yaz_marc_create();
1388                 wrbuf_rewind (rec->wrbuf_marc);
1389                 if (yaz_marc_decode_wrbuf (
1390                         mt, (const char *) r->u.octet_aligned->buf,
1391                         r->u.octet_aligned->len,
1392                         rec->wrbuf_marc) > 0)
1393                 {
1394                     if (len)
1395                         *len = wrbuf_len(rec->wrbuf_marc);
1396                     yaz_marc_destroy(mt);
1397                     return wrbuf_buf(rec->wrbuf_marc);
1398                 }
1399                 yaz_marc_destroy(mt);
1400             }
1401             if (len)
1402                 *len = r->u.octet_aligned->len;
1403             return (const char *) r->u.octet_aligned->buf;
1404         }
1405         else if (r->which == Z_External_grs1)
1406         {
1407             if (!rec->wrbuf_marc)
1408                 rec->wrbuf_marc = wrbuf_alloc();
1409             wrbuf_rewind (rec->wrbuf_marc);
1410             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1411             if (len)
1412                 *len = wrbuf_len(rec->wrbuf_marc);
1413             return wrbuf_buf(rec->wrbuf_marc);
1414         }
1415         return 0;
1416     }
1417     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1418              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1419     {
1420         Z_External *r = (Z_External *) npr->u.databaseRecord;
1421         oident *ent = oid_getentbyoid(r->direct_reference);
1422
1423         if (r->which == Z_External_sutrs)
1424         {
1425             if (len) *len = r->u.sutrs->len;
1426             return (const char *) r->u.sutrs->buf;
1427         }
1428         else if (r->which == Z_External_octet)
1429         {
1430             yaz_marc_t mt;
1431             int marc_decode_type = YAZ_MARC_MARCXML;
1432
1433             if (!strcmp(type, "oai"))
1434                 marc_decode_type = YAZ_MARC_OAIMARC;
1435             switch (ent->value)
1436             {
1437             case VAL_SOIF:
1438             case VAL_HTML:
1439             case VAL_SUTRS:
1440                 break;
1441             case VAL_TEXT_XML:
1442             case VAL_APPLICATION_XML:
1443                 break;
1444             default:
1445                 if (!rec->wrbuf_marc)
1446                     rec->wrbuf_marc = wrbuf_alloc();
1447                 wrbuf_rewind (rec->wrbuf_marc);
1448                 mt = yaz_marc_create();
1449
1450                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1451                 if (yaz_marc_decode_wrbuf (
1452                         mt, (const char *) r->u.octet_aligned->buf,
1453                         r->u.octet_aligned->len,
1454                         rec->wrbuf_marc) > 0)
1455                 {
1456                     if (len)
1457                         *len = wrbuf_len(rec->wrbuf_marc);
1458                     yaz_marc_destroy(mt);
1459                     return wrbuf_buf(rec->wrbuf_marc);
1460                 }
1461                 yaz_marc_destroy(mt);
1462             }
1463             if (len) *len = r->u.octet_aligned->len;
1464             return (const char *) r->u.octet_aligned->buf;
1465         }
1466         else if (r->which == Z_External_grs1)
1467         {
1468             if (len) *len = 5;
1469             return "GRS-1";
1470         }
1471         else if (r->which == Z_External_OPAC)
1472         {
1473             if (len) *len = 4;
1474             return "OPAC";
1475         }
1476         return 0;
1477     }
1478     else if (!strcmp (type, "raw"))
1479     {
1480         if (npr->which == Z_NamePlusRecord_databaseRecord)
1481         {
1482             Z_External *r = (Z_External *) npr->u.databaseRecord;
1483
1484             if (r->which == Z_External_sutrs)
1485             {
1486                 if (len) *len = r->u.sutrs->len;
1487                 return (const char *) r->u.sutrs->buf;
1488             }
1489             else if (r->which == Z_External_octet)
1490             {
1491                 if (len) *len = r->u.octet_aligned->len;
1492                 return (const char *) r->u.octet_aligned->buf;
1493             }
1494             else /* grs-1, explain, ... */
1495             {
1496                 if (len) *len = -1;
1497                 return (const char *) npr->u.databaseRecord;
1498             }
1499         }
1500         return 0;
1501     }
1502     else if (!strcmp (type, "ext"))
1503     {
1504         if (npr->which == Z_NamePlusRecord_databaseRecord)
1505             return (const char *) npr->u.databaseRecord;
1506         return 0;
1507     }
1508     return 0;
1509 }
1510
1511 static int strcmp_null(const char *v1, const char *v2)
1512 {
1513     if (!v1 && !v2)
1514         return 0;
1515     if (!v1 || !v2)
1516         return -1;
1517     return strcmp(v1, v2);
1518 }
1519
1520 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1521                               int pos)
1522 {
1523     ZOOM_record_cache rc;
1524     const char *elementSetName =
1525         ZOOM_resultset_option_get (r, "elementSetName");
1526     const char *syntax =
1527         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1528
1529     for (rc = r->record_cache; rc; rc = rc->next)
1530     {
1531         if (pos == rc->pos)
1532         {
1533             if (strcmp_null(r->schema, rc->schema))
1534                 continue;
1535             if (strcmp_null(elementSetName,rc->elementSetName))
1536                 continue;
1537             if (strcmp_null(syntax, rc->syntax))
1538                 continue;
1539             /* not destroying rc->npr (it's handled by nmem )*/
1540             rc->rec.npr = npr;
1541             /* keeping wrbuf_marc too */
1542             return;
1543         }
1544     }
1545     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1546     rc->rec.npr = npr;
1547     rc->rec.odr = 0;
1548     rc->rec.wrbuf_marc = 0;
1549     if (elementSetName)
1550         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1551     else
1552         rc->elementSetName = 0;
1553
1554     if (syntax)
1555         rc->syntax = odr_strdup (r->odr, syntax);
1556     else
1557         rc->syntax = 0;
1558
1559     if (r->schema)
1560         rc->schema = odr_strdup (r->odr, r->schema);
1561     else
1562         rc->schema = 0;
1563
1564     rc->pos = pos;
1565     rc->next = r->record_cache;
1566     r->record_cache = rc;
1567 }
1568
1569 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1570 {
1571     ZOOM_record_cache rc;
1572     const char *elementSetName =
1573         ZOOM_resultset_option_get (r, "elementSetName");
1574     const char *syntax =
1575         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1576
1577     for (rc = r->record_cache; rc; rc = rc->next)
1578     {
1579         if (pos == rc->pos)
1580         {
1581             if (strcmp_null(r->schema, rc->schema))
1582                 continue;
1583             if (strcmp_null(elementSetName,rc->elementSetName))
1584                 continue;
1585             if (strcmp_null(syntax, rc->syntax))
1586                 continue;
1587             return &rc->rec;
1588         }
1589     }
1590     return 0;
1591 }
1592
1593 static void handle_records (ZOOM_connection c, Z_Records *sr,
1594                             int present_phase)
1595 {
1596     ZOOM_resultset resultset;
1597
1598     if (!c->tasks)
1599         return ;
1600     switch (c->tasks->which)
1601     {
1602     case ZOOM_TASK_SEARCH:
1603         resultset = c->tasks->u.search.resultset;
1604         break;
1605     case ZOOM_TASK_RETRIEVE:
1606         resultset = c->tasks->u.retrieve.resultset;
1607         break;
1608     default:
1609         return;
1610     }
1611     if (sr && sr->which == Z_Records_NSD)
1612     {
1613         Z_DiagRec dr, *dr_p = &dr;
1614         dr.which = Z_DiagRec_defaultFormat;
1615         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1616
1617         response_diag (c, dr_p);
1618     }
1619     else if (sr && sr->which == Z_Records_multipleNSD)
1620     {
1621         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1622             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1623         else
1624             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1625     }
1626     else
1627     {
1628         if (resultset->count + resultset->start > resultset->size)
1629             resultset->count = resultset->size - resultset->start;
1630         if (resultset->count < 0)
1631             resultset->count = 0;
1632         if (sr && sr->which == Z_Records_DBOSD)
1633         {
1634             int i;
1635             NMEM nmem = odr_extract_mem (c->odr_in);
1636             Z_NamePlusRecordList *p =
1637                 sr->u.databaseOrSurDiagnostics;
1638             for (i = 0; i<p->num_records; i++)
1639             {
1640                 record_cache_add (resultset, p->records[i],
1641                                   i+ resultset->start);
1642             }
1643             /* transfer our response to search_nmem .. we need it later */
1644             nmem_transfer (resultset->odr->mem, nmem);
1645             nmem_destroy (nmem);
1646             if (present_phase && p->num_records == 0)
1647             {
1648                 /* present response and we didn't get any records! */
1649                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1650             }
1651         }
1652         else if (present_phase)
1653         {
1654             /* present response and we didn't get any records! */
1655             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1656         }
1657     }
1658 }
1659
1660 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1661 {
1662     handle_records (c, pr->records, 1);
1663 }
1664
1665 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1666 {
1667     ZOOM_resultset resultset;
1668
1669     yaz_log (LOG_DEBUG, "got search response");
1670
1671     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1672         return ;
1673
1674     resultset = c->tasks->u.search.resultset;
1675
1676     resultset->size = *sr->resultCount;
1677     handle_records (c, sr->records, 0);
1678 }
1679
1680 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1681 {
1682     if (res->diagnostics && res->num_diagnostics > 0)
1683         response_diag (c, res->diagnostics[0]);
1684 }
1685
1686 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1687 {
1688     NMEM nmem = odr_extract_mem (c->odr_in);
1689     ZOOM_scanset scan;
1690
1691     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1692         return 0;
1693     scan = c->tasks->u.scan.scan;
1694
1695     if (res->entries && res->entries->nonsurrogateDiagnostics)
1696         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1697     scan->scan_response = res;
1698     nmem_transfer (scan->odr->mem, nmem);
1699     if (res->stepSize)
1700         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1701     if (res->positionOfTerm)
1702         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1703     if (res->scanStatus)
1704         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1705     if (res->numberOfEntriesReturned)
1706         ZOOM_options_set_int (scan->options, "number",
1707                               *res->numberOfEntriesReturned);
1708     nmem_destroy (nmem);
1709     return 1;
1710 }
1711
1712 static zoom_ret send_sort (ZOOM_connection c)
1713 {
1714     ZOOM_resultset  resultset;
1715
1716     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1717         return zoom_complete;
1718
1719     resultset = c->tasks->u.search.resultset;
1720
1721     if (c->error)
1722     {
1723         resultset->r_sort_spec = 0;
1724         return zoom_complete;
1725     }
1726     if (resultset->r_sort_spec)
1727     {
1728         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1729         Z_SortRequest *req = apdu->u.sortRequest;
1730
1731         req->num_inputResultSetNames = 1;
1732         req->inputResultSetNames = (Z_InternationalString **)
1733             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1734         req->inputResultSetNames[0] =
1735             odr_strdup (c->odr_out, resultset->setname);
1736         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1737         req->sortSequence = resultset->r_sort_spec;
1738         resultset->r_sort_spec = 0;
1739         return send_APDU (c, apdu);
1740     }
1741     return zoom_complete;
1742 }
1743
1744 static zoom_ret send_present (ZOOM_connection c)
1745 {
1746     Z_APDU *apdu = 0;
1747     Z_PresentRequest *req = 0;
1748     int i = 0;
1749     const char *syntax = 0;
1750     const char *elementSetName = 0;
1751     ZOOM_resultset  resultset;
1752
1753     if (!c->tasks)
1754         return zoom_complete;
1755
1756     switch (c->tasks->which)
1757     {
1758     case ZOOM_TASK_SEARCH:
1759         resultset = c->tasks->u.search.resultset;
1760         break;
1761     case ZOOM_TASK_RETRIEVE:
1762         resultset = c->tasks->u.retrieve.resultset;
1763         resultset->start = c->tasks->u.retrieve.start;
1764         resultset->count = c->tasks->u.retrieve.count;
1765
1766         if (resultset->start >= resultset->size)
1767             return zoom_complete;
1768         if (resultset->start + resultset->count > resultset->size)
1769             resultset->count = resultset->size - resultset->start;
1770         break;
1771     default:
1772         return zoom_complete;
1773     }
1774
1775     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1776     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1777
1778     if (c->error)                  /* don't continue on error */
1779         return zoom_complete;
1780     if (resultset->start < 0)
1781         return zoom_complete;
1782     for (i = 0; i<resultset->count; i++)
1783     {
1784         ZOOM_record rec =
1785             record_cache_lookup (resultset, i + resultset->start);
1786         if (!rec)
1787             break;
1788     }
1789     if (i == resultset->count)
1790         return zoom_complete;
1791
1792     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1793     req = apdu->u.presentRequest;
1794
1795     resultset->start += i;
1796     resultset->count -= i;
1797     *req->resultSetStartPoint = resultset->start + 1;
1798     *req->numberOfRecordsRequested = resultset->count;
1799     assert (*req->numberOfRecordsRequested > 0);
1800
1801     if (syntax && *syntax)
1802         req->preferredRecordSyntax =
1803             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1804
1805     if (resultset->schema && *resultset->schema)
1806     {
1807         Z_RecordComposition *compo = (Z_RecordComposition *)
1808             odr_malloc (c->odr_out, sizeof(*compo));
1809
1810         req->recordComposition = compo;
1811         compo->which = Z_RecordComp_complex;
1812         compo->u.complex = (Z_CompSpec *)
1813             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1814         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1815             odr_malloc(c->odr_out, sizeof(bool_t));
1816         *compo->u.complex->selectAlternativeSyntax = 0;
1817
1818         compo->u.complex->generic = (Z_Specification *)
1819             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1820
1821         compo->u.complex->generic->which = Z_Schema_oid;
1822         compo->u.complex->generic->schema.oid = (Odr_oid *)
1823             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1824
1825         if (!compo->u.complex->generic->schema.oid)
1826         {
1827             /* OID wasn't a schema! Try record syntax instead. */
1828
1829             compo->u.complex->generic->schema.oid = (Odr_oid *)
1830                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1831         }
1832         if (elementSetName && *elementSetName)
1833         {
1834             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1835                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1836             compo->u.complex->generic->elementSpec->which =
1837                 Z_ElementSpec_elementSetName;
1838             compo->u.complex->generic->elementSpec->u.elementSetName =
1839                 odr_strdup (c->odr_out, elementSetName);
1840         }
1841         else
1842             compo->u.complex->generic->elementSpec = 0;
1843         compo->u.complex->num_dbSpecific = 0;
1844         compo->u.complex->dbSpecific = 0;
1845         compo->u.complex->num_recordSyntax = 0;
1846         compo->u.complex->recordSyntax = 0;
1847     }
1848     else if (elementSetName && *elementSetName)
1849     {
1850         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1851             odr_malloc (c->odr_out, sizeof(*esn));
1852         Z_RecordComposition *compo = (Z_RecordComposition *)
1853             odr_malloc (c->odr_out, sizeof(*compo));
1854
1855         esn->which = Z_ElementSetNames_generic;
1856         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1857         compo->which = Z_RecordComp_simple;
1858         compo->u.simple = esn;
1859         req->recordComposition = compo;
1860     }
1861     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1862     return send_APDU (c, apdu);
1863 }
1864
1865 ZOOM_API(ZOOM_scanset)
1866 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1867 {
1868     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1869
1870     scan->connection = c;
1871     scan->odr = odr_createmem (ODR_DECODE);
1872     scan->options = ZOOM_options_create_with_parent (c->options);
1873     scan->refcount = 1;
1874     scan->scan_response = 0;
1875
1876     if ((scan->termListAndStartPoint =
1877          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1878                       start)))
1879     {
1880         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1881         task->u.scan.scan = scan;
1882
1883         (scan->refcount)++;
1884         if (!c->async)
1885         {
1886             while (ZOOM_event (1, &c))
1887                 ;
1888         }
1889     }
1890     return scan;
1891 }
1892
1893 ZOOM_API(void)
1894 ZOOM_scanset_destroy (ZOOM_scanset scan)
1895 {
1896     if (!scan)
1897         return;
1898     (scan->refcount)--;
1899     if (scan->refcount == 0)
1900     {
1901         odr_destroy (scan->odr);
1902
1903         ZOOM_options_destroy (scan->options);
1904         xfree (scan);
1905     }
1906 }
1907
1908 static zoom_ret send_package (ZOOM_connection c)
1909 {
1910     ZOOM_Event event;
1911     if (!c->tasks)
1912         return zoom_complete;
1913     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1914
1915     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1916     ZOOM_connection_put_event (c, event);
1917
1918     return do_write_ex (c, c->tasks->u.package->buf_out,
1919                         c->tasks->u.package->len_out);
1920 }
1921
1922 static zoom_ret send_scan (ZOOM_connection c)
1923 {
1924     ZOOM_scanset scan;
1925     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1926     Z_ScanRequest *req = apdu->u.scanRequest;
1927     if (!c->tasks)
1928         return zoom_complete;
1929     assert (c->tasks->which == ZOOM_TASK_SCAN);
1930     scan = c->tasks->u.scan.scan;
1931
1932     req->termListAndStartPoint = scan->termListAndStartPoint;
1933     req->attributeSet = scan->attributeSet;
1934
1935     *req->numberOfTermsRequested =
1936         ZOOM_options_get_int(scan->options, "number", 10);
1937
1938     req->preferredPositionInResponse =
1939         odr_intdup (c->odr_out,
1940                     ZOOM_options_get_int(scan->options, "position", 1));
1941
1942     req->stepSize =
1943         odr_intdup (c->odr_out,
1944                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1945
1946     req->databaseNames = set_DatabaseNames (c, scan->options,
1947                                             &req->num_databaseNames);
1948
1949     return send_APDU (c, apdu);
1950 }
1951
1952 ZOOM_API(size_t)
1953 ZOOM_scanset_size (ZOOM_scanset scan)
1954 {
1955     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1956         return 0;
1957     return scan->scan_response->entries->num_entries;
1958 }
1959
1960 ZOOM_API(const char *)
1961 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1962                                int *occ, int *len)
1963 {
1964     const char *term = 0;
1965     size_t noent = ZOOM_scanset_size (scan);
1966     Z_ScanResponse *res = scan->scan_response;
1967
1968     *len = 0;
1969     *occ = 0;
1970     if (pos >= noent)
1971         return 0;
1972     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1973     {
1974         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1975
1976         if (t->term->which == Z_Term_general)
1977         {
1978             term = (const char *) t->term->u.general->buf;
1979             *len = t->term->u.general->len;
1980         }
1981         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1982     }
1983     return term;
1984 }
1985
1986 ZOOM_API(const char *)
1987 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1988 {
1989     return ZOOM_options_get (scan->options, key);
1990 }
1991
1992 ZOOM_API(void)
1993 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1994                               const char *val)
1995 {
1996     ZOOM_options_set (scan->options, key, val);
1997 }
1998
1999 static Z_APDU *create_es_package (ZOOM_package p, int type)
2000 {
2001     const char *str;
2002     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2003     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2004
2005     *req->function = Z_ExtendedServicesRequest_create;
2006
2007     str = ZOOM_options_get(p->options, "package-name");
2008     if (str && *str)
2009         req->packageName = nmem_strdup (p->odr_out->mem, str);
2010
2011     str = ZOOM_options_get(p->options, "user-id");
2012     if (str)
2013         req->userId = nmem_strdup (p->odr_out->mem, str);
2014
2015     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2016                                               type);
2017
2018     str = ZOOM_options_get(p->options, "function");
2019     if (str)
2020     {
2021         if (!strcmp (str, "create"))
2022             *req->function = 1;
2023         if (!strcmp (str, "delete"))
2024             *req->function = 2;
2025         if (!strcmp (str, "modify"))
2026             *req->function = 3;
2027     }
2028     return apdu;
2029 }
2030
2031 static const char *ill_array_lookup (void *clientData, const char *idx)
2032 {
2033     ZOOM_package p = (ZOOM_package) clientData;
2034     return ZOOM_options_get (p->options, idx+4);
2035 }
2036
2037 static Z_External *encode_ill_request (ZOOM_package p)
2038 {
2039     ODR out = p->odr_out;
2040     ILL_Request *req;
2041     Z_External *r = 0;
2042     struct ill_get_ctl ctl;
2043
2044     ctl.odr = p->odr_out;
2045     ctl.clientData = p;
2046     ctl.f = ill_array_lookup;
2047
2048     req = ill_get_ILLRequest(&ctl, "ill", 0);
2049
2050     if (!ill_Request (out, &req, 0, 0))
2051     {
2052         int ill_request_size;
2053         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2054         if (ill_request_buf)
2055             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2056         return 0;
2057     }
2058     else
2059     {
2060         oident oid;
2061         int illRequest_size = 0;
2062         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2063
2064         oid.proto = PROTO_GENERAL;
2065         oid.oclass = CLASS_GENERAL;
2066         oid.value = VAL_ISO_ILL_1;
2067
2068         r = (Z_External *) odr_malloc (out, sizeof(*r));
2069         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2070         r->indirect_reference = 0;
2071         r->descriptor = 0;
2072         r->which = Z_External_single;
2073
2074         r->u.single_ASN1_type = (Odr_oct *)
2075             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2076         r->u.single_ASN1_type->buf = (unsigned char*)
2077             odr_malloc (out, illRequest_size);
2078         r->u.single_ASN1_type->len = illRequest_size;
2079         r->u.single_ASN1_type->size = illRequest_size;
2080         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2081     }
2082     return r;
2083 }
2084
2085 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2086 {
2087     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2088     const char *str;
2089
2090     req->which=Z_IOItemOrder_esRequest;
2091     req->u.esRequest = (Z_IORequest *)
2092         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2093
2094     /* to keep part ... */
2095     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2096         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2097     req->u.esRequest->toKeep->supplDescription = 0;
2098     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2099         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2100
2101     str = ZOOM_options_get(p->options, "contact-name");
2102     req->u.esRequest->toKeep->contact->name = str ?
2103         nmem_strdup (p->odr_out->mem, str) : 0;
2104
2105     str = ZOOM_options_get(p->options, "contact-phone");
2106     req->u.esRequest->toKeep->contact->phone = str ?
2107         nmem_strdup (p->odr_out->mem, str) : 0;
2108
2109     str = ZOOM_options_get(p->options, "contact-email");
2110     req->u.esRequest->toKeep->contact->email = str ?
2111         nmem_strdup (p->odr_out->mem, str) : 0;
2112
2113     req->u.esRequest->toKeep->addlBilling = 0;
2114
2115     /* not to keep part ... */
2116     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2117         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2118
2119     str = ZOOM_options_get(p->options, "itemorder-setname");
2120     if (!str)
2121         str = "default";
2122
2123     if (!*str)
2124         req->u.esRequest->notToKeep->resultSetItem = 0;
2125     else
2126     {
2127         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2128            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2129
2130         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2131            nmem_strdup (p->odr_out->mem, str);
2132         req->u.esRequest->notToKeep->resultSetItem->item =
2133             (int *) odr_malloc(p->odr_out, sizeof(int));
2134
2135         str = ZOOM_options_get(p->options, "itemorder-item");
2136         *req->u.esRequest->notToKeep->resultSetItem->item =
2137             (str ? atoi(str) : 1);
2138     }
2139     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2140
2141     return req;
2142 }
2143
2144 ZOOM_API(void)
2145     ZOOM_package_send (ZOOM_package p, const char *type)
2146 {
2147     Z_APDU *apdu = 0;
2148     ZOOM_connection c;
2149     if (!p)
2150         return;
2151     c = p->connection;
2152     odr_reset (p->odr_out);
2153     xfree (p->buf_out);
2154     p->buf_out = 0;
2155     if (!strcmp(type, "itemorder"))
2156     {
2157         Z_External *r;
2158         apdu = create_es_package (p, VAL_ITEMORDER);
2159         if (apdu)
2160         {
2161             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2162
2163             r->direct_reference =
2164                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2165                                        VAL_ITEMORDER);
2166             r->descriptor = 0;
2167             r->which = Z_External_itemOrder;
2168             r->indirect_reference = 0;
2169             r->u.itemOrder = encode_item_order (p);
2170
2171             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2172         }
2173     }
2174     if (apdu)
2175     {
2176         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2177         {
2178             char *buf;
2179
2180             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2181             task->u.package = p;
2182             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2183             p->buf_out = (char *) xmalloc (p->len_out);
2184             memcpy (p->buf_out, buf, p->len_out);
2185
2186             (p->refcount)++;
2187             if (!c->async)
2188             {
2189                 while (ZOOM_event (1, &c))
2190                     ;
2191             }
2192         }
2193     }
2194 }
2195
2196 ZOOM_API(ZOOM_package)
2197     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2198 {
2199     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2200
2201     p->connection = c;
2202     p->odr_out = odr_createmem (ODR_ENCODE);
2203     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2204     p->refcount = 1;
2205     p->buf_out = 0;
2206     p->len_out = 0;
2207     return p;
2208 }
2209
2210 ZOOM_API(void)
2211     ZOOM_package_destroy(ZOOM_package p)
2212 {
2213     if (!p)
2214         return;
2215     (p->refcount)--;
2216     if (p->refcount == 0)
2217     {
2218         odr_destroy (p->odr_out);
2219         xfree (p->buf_out);
2220
2221         ZOOM_options_destroy (p->options);
2222         xfree (p);
2223     }
2224 }
2225
2226 ZOOM_API(const char *)
2227 ZOOM_package_option_get (ZOOM_package p, const char *key)
2228 {
2229     return ZOOM_options_get (p->options, key);
2230 }
2231
2232
2233 ZOOM_API(void)
2234 ZOOM_package_option_set (ZOOM_package p, const char *key,
2235                               const char *val)
2236 {
2237     ZOOM_options_set (p->options, key, val);
2238 }
2239
2240 static int ZOOM_connection_exec_task (ZOOM_connection c)
2241 {
2242     ZOOM_task task = c->tasks;
2243     zoom_ret ret = zoom_complete;
2244
2245     if (!task)
2246     {
2247         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2248         return 0;
2249     }
2250     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2251              task->which, task->running);
2252     if (c->error != ZOOM_ERROR_NONE)
2253     {
2254         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2255         ZOOM_connection_remove_tasks (c);
2256         return 0;
2257     }
2258     if (task->running)
2259     {
2260         yaz_log (LOG_DEBUG, "task already running");
2261         return 0;
2262     }
2263     task->running = 1;
2264     ret = zoom_complete;
2265     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2266     {
2267         switch (task->which)
2268         {
2269         case ZOOM_TASK_SEARCH:
2270             if (c->proto == PROTO_HTTP)
2271                 ret = ZOOM_connection_srw_send_search(c);
2272             else
2273                 ret = ZOOM_connection_send_search(c);
2274             break;
2275         case ZOOM_TASK_RETRIEVE:
2276             if (c->proto == PROTO_HTTP)
2277                 ret = ZOOM_connection_srw_send_search(c);
2278             else
2279                 ret = send_present (c);
2280             break;
2281         case ZOOM_TASK_CONNECT:
2282             ret = do_connect(c);
2283             break;
2284         case ZOOM_TASK_SCAN:
2285             ret = send_scan(c);
2286             break;
2287         case ZOOM_TASK_PACKAGE:
2288             ret = send_package(c);
2289             break;
2290         }
2291     }
2292     else
2293     {
2294         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2295         ZOOM_connection_remove_tasks (c);
2296     }
2297     if (ret == zoom_complete)
2298     {
2299         yaz_log (LOG_DEBUG, "task removed (complete)");
2300         ZOOM_connection_remove_task (c);
2301         return 0;
2302     }
2303     yaz_log (LOG_DEBUG, "task pending");
2304     return 1;
2305 }
2306
2307 static zoom_ret send_sort_present (ZOOM_connection c)
2308 {
2309     zoom_ret r = send_sort (c);
2310     if (r == zoom_complete)
2311         r = send_present (c);
2312     return r;
2313 }
2314
2315 static int es_response (ZOOM_connection c,
2316                         Z_ExtendedServicesResponse *res)
2317 {
2318     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2319         return 0;
2320     if (res->diagnostics && res->num_diagnostics > 0)
2321         response_diag(c, res->diagnostics[0]);
2322     if (res->taskPackage &&
2323         res->taskPackage->which == Z_External_extendedService)
2324     {
2325         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2326         Odr_oct *id = taskPackage->targetReference;
2327
2328         if (id)
2329             ZOOM_options_setl (c->tasks->u.package->options,
2330                                "targetReference", (char*) id->buf, id->len);
2331     }
2332     return 1;
2333 }
2334
2335
2336 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2337 {
2338     Z_InitResponse *initrs;
2339
2340     c->mask = 0;
2341     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2342     switch(apdu->which)
2343     {
2344     case Z_APDU_initResponse:
2345         initrs = apdu->u.initResponse;
2346         ZOOM_connection_option_set(c, "targetImplementationId",
2347                                    initrs->implementationId ?
2348                                    initrs->implementationId : "");
2349         ZOOM_connection_option_set(c, "targetImplementationName",
2350                                    initrs->implementationName ?
2351                                    initrs->implementationName : "");
2352         ZOOM_connection_option_set(c, "targetImplementationVersion",
2353                                    initrs->implementationVersion ?
2354                                    initrs->implementationVersion : "");
2355         if (!*initrs->result)
2356         {
2357             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2358         }
2359         else
2360         {
2361             char *cookie =
2362                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2363                                           VAL_COOKIE, 1, 0);
2364             xfree (c->cookie_in);
2365             c->cookie_in = 0;
2366             if (cookie)
2367                 c->cookie_in = xstrdup(cookie);
2368             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2369                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2370                 c->support_named_resultsets = 1;
2371             if (c->tasks)
2372             {
2373                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2374                 ZOOM_connection_remove_task (c);
2375             }
2376             ZOOM_connection_exec_task (c);
2377         }
2378         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2379         {
2380             NMEM tmpmem = nmem_create();
2381             Z_CharSetandLanguageNegotiation *p =
2382                 yaz_get_charneg_record(initrs->otherInfo);
2383
2384             if (p)
2385             {
2386                 char *charset=NULL, *lang=NULL;
2387                 int sel;
2388
2389                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2390                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2391                         "language %s, select %d",
2392                         charset ? charset : "none", lang ? lang : "none", sel);
2393                 if (charset)
2394                     ZOOM_connection_option_set (c, "negotiation-charset",
2395                                                 charset);
2396                 if (lang)
2397                     ZOOM_connection_option_set (c, "negotiation-lang",
2398                                                 lang);
2399                 nmem_destroy(tmpmem);
2400             }
2401         }
2402         break;
2403     case Z_APDU_searchResponse:
2404         handle_search_response (c, apdu->u.searchResponse);
2405         if (send_sort_present (c) == zoom_complete)
2406             ZOOM_connection_remove_task (c);
2407         break;
2408     case Z_APDU_presentResponse:
2409         handle_present_response (c, apdu->u.presentResponse);
2410         if (send_present (c) == zoom_complete)
2411             ZOOM_connection_remove_task (c);
2412         break;
2413     case Z_APDU_sortResponse:
2414         sort_response (c, apdu->u.sortResponse);
2415         if (send_present (c) == zoom_complete)
2416             ZOOM_connection_remove_task (c);
2417         break;
2418     case Z_APDU_scanResponse:
2419         scan_response (c, apdu->u.scanResponse);
2420         ZOOM_connection_remove_task (c);
2421         break;
2422     case Z_APDU_extendedServicesResponse:
2423         es_response (c, apdu->u.extendedServicesResponse);
2424         ZOOM_connection_remove_task (c);
2425         break;
2426     case Z_APDU_close:
2427         if (c->reconnect_ok)
2428         {
2429             do_close(c);
2430             c->tasks->running = 0;
2431             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2432         }
2433         else
2434         {
2435             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2436             do_close(c);
2437         }
2438         break;
2439     default:
2440         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2441         do_close(c);
2442     }
2443 }
2444
2445 #if HAVE_XML2
2446 static void handle_srw_response(ZOOM_connection c,
2447                                 Z_SRW_searchRetrieveResponse *res)
2448 {
2449     ZOOM_resultset resultset = 0;
2450     int i;
2451     NMEM nmem;
2452
2453     if (!c->tasks)
2454         return;
2455
2456     if (c->tasks->which == ZOOM_TASK_SEARCH)
2457         resultset = c->tasks->u.search.resultset;
2458     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2459         resultset = c->tasks->u.retrieve.resultset;
2460     else
2461         return ;
2462
2463     resultset->size = 0;
2464
2465     yaz_log(LOG_DEBUG, "got SRW response OK");
2466
2467     if (res->numberOfRecords)
2468         resultset->size = *res->numberOfRecords;
2469
2470     for (i = 0; i<res->num_records; i++)
2471     {
2472         int pos;
2473
2474         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2475             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2476
2477         if (res->records[i].recordPosition &&
2478             *res->records[i].recordPosition > 0)
2479             pos = *res->records[i].recordPosition - 1;
2480         else
2481             pos = resultset->start + i;
2482
2483         npr->databaseName = 0;
2484         npr->which = Z_NamePlusRecord_databaseRecord;
2485         npr->u.databaseRecord = (Z_External *)
2486             odr_malloc(c->odr_in, sizeof(Z_External));
2487         npr->u.databaseRecord->descriptor = 0;
2488         npr->u.databaseRecord->direct_reference =
2489             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2490         npr->u.databaseRecord->which = Z_External_octet;
2491         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2492             odr_malloc(c->odr_in, sizeof(Odr_oct));
2493         npr->u.databaseRecord->u.octet_aligned->buf =
2494             res->records[i].recordData_buf;
2495         npr->u.databaseRecord->u.octet_aligned->len =
2496             npr->u.databaseRecord->u.octet_aligned->size =
2497             res->records[i].recordData_len;
2498         record_cache_add (resultset, npr, pos);
2499     }
2500     if (res->num_diagnostics > 0)
2501     {
2502         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2503                        res->diagnostics[0].details, 0);
2504     }
2505     nmem = odr_extract_mem(c->odr_in);
2506     nmem_transfer(resultset->odr->mem, nmem);
2507     nmem_destroy(nmem);
2508 }
2509 #endif
2510
2511 #if HAVE_XML2
2512 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2513 {
2514     int ret = -1;
2515     const char *content_type = z_HTTP_header_lookup(hres->headers,
2516                                                     "Content-Type");
2517     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2518                                                        "Connection");
2519     c->mask = 0;
2520     yaz_log (LOG_DEBUG, "handle_http");
2521
2522     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2523     {
2524         Z_SOAP *soap_package = 0;
2525         ODR o = odr_createmem(ODR_DECODE);
2526         Z_SOAP_Handler soap_handlers[2] = {
2527             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2528              (Z_SOAP_fun) yaz_srw_codec},
2529             {0, 0, 0}
2530         };
2531         ret = z_soap_codec(o, &soap_package,
2532                            &hres->content_buf, &hres->content_len,
2533                            soap_handlers);
2534         if (!ret && soap_package->which == Z_SOAP_generic &&
2535             soap_package->u.generic->no == 0)
2536         {
2537             Z_SRW_PDU *sr = soap_package->u.generic->p;
2538             if (sr->which == Z_SRW_searchRetrieve_response)
2539                 handle_srw_response(c, sr->u.response);
2540             else
2541                 ret = -1;
2542         }
2543         else if (!ret && (soap_package->which == Z_SOAP_fault
2544                           || soap_package->which == Z_SOAP_error))
2545         {
2546             set_HTTP_error(c, hres->code,
2547                            soap_package->u.fault->fault_code,
2548                            soap_package->u.fault->fault_string);
2549         }
2550         else
2551             ret = -1;
2552         odr_destroy(o);
2553     }
2554     if (ret)
2555     {
2556         if (hres->code != 200)
2557             set_HTTP_error(c, hres->code, 0, 0);
2558         else
2559             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2560         do_close (c);
2561     }
2562     ZOOM_connection_remove_task(c);
2563     if (!strcmp(hres->version, "1.0"))
2564     {
2565         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2566         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2567             do_close(c);
2568     }
2569     else
2570     {
2571         /* HTTP 1.1: only if no close we stay alive .. */
2572         if (connection_head && !strcmp(connection_head, "close"))
2573             do_close(c);
2574     }
2575 }
2576 #endif
2577
2578 static int do_read (ZOOM_connection c)
2579 {
2580     int r;
2581     ZOOM_Event event;
2582
2583     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2584     ZOOM_connection_put_event (c, event);
2585
2586     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2587
2588     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2589     if (r == 1)
2590         return 0;
2591     if (r <= 0)
2592     {
2593         if (c->reconnect_ok)
2594         {
2595             do_close (c);
2596             c->reconnect_ok = 0;
2597             yaz_log (LOG_DEBUG, "reconnect read");
2598             c->tasks->running = 0;
2599             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2600         }
2601         else
2602         {
2603             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2604             do_close (c);
2605         }
2606     }
2607     else
2608     {
2609         Z_GDU *gdu;
2610         ZOOM_Event event;
2611
2612         odr_reset (c->odr_in);
2613         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2614         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2615         ZOOM_connection_put_event (c, event);
2616
2617         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2618         {
2619             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2620             do_close (c);
2621         }
2622         else if (gdu->which == Z_GDU_Z3950)
2623             handle_apdu (c, gdu->u.z3950);
2624         else if (gdu->which == Z_GDU_HTTP_Response)
2625         {
2626 #if HAVE_XML2
2627             handle_http (c, gdu->u.HTTP_Response);
2628 #else
2629             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2630             do_close (c);
2631 #endif
2632         }
2633         c->reconnect_ok = 0;
2634     }
2635     return 1;
2636 }
2637
2638 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2639 {
2640     int r;
2641     ZOOM_Event event;
2642
2643     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2644     ZOOM_connection_put_event (c, event);
2645
2646     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2647     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2648     {
2649         if (c->reconnect_ok)
2650         {
2651             do_close (c);
2652             c->reconnect_ok = 0;
2653             yaz_log (LOG_DEBUG, "reconnect write");
2654             c->tasks->running = 0;
2655             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2656             return zoom_pending;
2657         }
2658         if (c->state == STATE_CONNECTING)
2659             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2660         else
2661             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2662         do_close (c);
2663         return zoom_complete;
2664     }
2665     else if (r == 1)
2666     {
2667         c->mask = ZOOM_SELECT_EXCEPT;
2668         if (c->cs->io_pending & CS_WANT_WRITE)
2669             c->mask += ZOOM_SELECT_WRITE;
2670         if (c->cs->io_pending & CS_WANT_READ)
2671             c->mask += ZOOM_SELECT_READ;
2672         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2673     }
2674     else
2675     {
2676         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2677         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2678     }
2679     return zoom_pending;
2680 }
2681
2682 static zoom_ret do_write(ZOOM_connection c)
2683 {
2684     return do_write_ex (c, c->buf_out, c->len_out);
2685 }
2686
2687
2688 ZOOM_API(const char *)
2689 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2690 {
2691     return ZOOM_options_get (c->options, key);
2692 }
2693
2694 ZOOM_API(void)
2695 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2696                                   const char *val)
2697 {
2698     ZOOM_options_set (c->options, key, val);
2699 }
2700
2701 ZOOM_API(const char *)
2702 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2703 {
2704     return ZOOM_options_get (r->options, key);
2705 }
2706
2707 ZOOM_API(void)
2708 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2709                                   const char *val)
2710 {
2711     ZOOM_options_set (r->options, key, val);
2712 }
2713
2714
2715 ZOOM_API(int)
2716 ZOOM_connection_errcode (ZOOM_connection c)
2717 {
2718     return ZOOM_connection_error (c, 0, 0);
2719 }
2720
2721 ZOOM_API(const char *)
2722 ZOOM_connection_errmsg (ZOOM_connection c)
2723 {
2724     const char *msg;
2725     ZOOM_connection_error (c, &msg, 0);
2726     return msg;
2727 }
2728
2729 ZOOM_API(const char *)
2730 ZOOM_connection_addinfo (ZOOM_connection c)
2731 {
2732     const char *addinfo;
2733     ZOOM_connection_error (c, 0, &addinfo);
2734     return addinfo;
2735 }
2736
2737 ZOOM_API(const char *)
2738 ZOOM_diag_str (int error)
2739 {
2740     switch (error)
2741     {
2742     case ZOOM_ERROR_NONE:
2743         return "No error";
2744     case ZOOM_ERROR_CONNECT:
2745         return "Connect failed";
2746     case ZOOM_ERROR_MEMORY:
2747         return "Out of memory";
2748     case ZOOM_ERROR_ENCODE:
2749         return "Encoding failed";
2750     case ZOOM_ERROR_DECODE:
2751         return "Decoding failed";
2752     case ZOOM_ERROR_CONNECTION_LOST:
2753         return "Connection lost";
2754     case ZOOM_ERROR_INIT:
2755         return "Init rejected";
2756     case ZOOM_ERROR_INTERNAL:
2757         return "Internal failure";
2758     case ZOOM_ERROR_TIMEOUT:
2759         return "Timeout";
2760     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2761         return "Unsupported protocol";
2762     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2763         return "Unsupported query type";
2764     default:
2765         return diagbib1_str (error);
2766     }
2767 }
2768
2769 ZOOM_API(int)
2770 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2771                          const char **addinfo, const char **diagset)
2772 {
2773     int error = c->error;
2774     if (cp)
2775     {
2776         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2777             *cp = ZOOM_diag_str(error);
2778         else if (!strcmp(c->diagset, "HTTP"))
2779             *cp = z_HTTP_errmsg(c->error);
2780         else if (!strcmp(c->diagset, "Bib-1"))
2781             *cp = ZOOM_diag_str(error);
2782         else if (!strcmp(c->diagset, "SRW"))
2783             *cp = yaz_diag_srw_str(c->error);
2784         else
2785             *cp = "Unknown error and diagnostic set";
2786     }
2787     if (addinfo)
2788         *addinfo = c->addinfo ? c->addinfo : "";
2789     if (diagset)
2790         *diagset = c->diagset ? c->diagset : "";
2791     return c->error;
2792 }
2793
2794 ZOOM_API(int)
2795 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2796                        const char **addinfo)
2797 {
2798     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2799 }
2800
2801 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2802 {
2803     ZOOM_Event event = 0;
2804     int r = cs_look(c->cs);
2805     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2806              c, mask, r);
2807
2808     if (r == CS_NONE)
2809     {
2810         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2811         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2812         do_close (c);
2813         ZOOM_connection_put_event (c, event);
2814     }
2815     else if (r == CS_CONNECT)
2816     {
2817         int ret;
2818         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2819
2820         ret = cs_rcvconnect (c->cs);
2821         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2822         if (ret == 1)
2823         {
2824             c->mask = ZOOM_SELECT_EXCEPT;
2825             if (c->cs->io_pending & CS_WANT_WRITE)
2826                 c->mask += ZOOM_SELECT_WRITE;
2827             if (c->cs->io_pending & CS_WANT_READ)
2828                 c->mask += ZOOM_SELECT_READ;
2829             ZOOM_connection_put_event (c, event);
2830         }
2831         else if (ret == 0)
2832         {
2833             ZOOM_connection_put_event (c, event);
2834             if (c->proto == PROTO_Z3950)
2835                 ZOOM_connection_send_init(c);
2836             else
2837             {
2838                 /* no init request for SRW .. */
2839                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2840                 ZOOM_connection_remove_task (c);
2841                 c->mask = 0;
2842                 ZOOM_connection_exec_task (c);
2843             }
2844             c->state = STATE_ESTABLISHED;
2845         }
2846         else
2847         {
2848             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2849             do_close (c);
2850             ZOOM_connection_put_event (c, event);
2851         }
2852     }
2853     else
2854     {
2855         if (mask & ZOOM_SELECT_READ)
2856             do_read (c);
2857         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2858             do_write (c);
2859     }
2860     return 1;
2861 }
2862
2863 ZOOM_API(int)
2864 ZOOM_connection_last_event(ZOOM_connection cs)
2865 {
2866     if (!cs)
2867         return ZOOM_EVENT_NONE;
2868     return cs->last_event;
2869 }
2870
2871 ZOOM_API(int)
2872 ZOOM_event (int no, ZOOM_connection *cs)
2873 {
2874     int timeout = 5000;
2875 #if HAVE_SYS_POLL_H
2876     struct pollfd pollfds[1024];
2877     ZOOM_connection poll_cs[1024];
2878 #else
2879     struct timeval tv;
2880     fd_set input, output, except;
2881 #endif
2882     int i, r, nfds;
2883     int max_fd = 0;
2884
2885     for (i = 0; i<no; i++)
2886     {
2887         ZOOM_connection c = cs[i];
2888         ZOOM_Event event;
2889         if (c && (event = ZOOM_connection_get_event(c)))
2890         {
2891             ZOOM_Event_destroy (event);
2892             return i+1;
2893         }
2894     }
2895     for (i = 0; i<no; i++)
2896     {
2897         ZOOM_connection c = cs[i];
2898         ZOOM_Event event;
2899         if (c && ZOOM_connection_exec_task (c))
2900         {
2901             if ((event = ZOOM_connection_get_event(c)))
2902             {
2903                 ZOOM_Event_destroy (event);
2904                 return i+1;
2905             }
2906         }
2907     }
2908 #if HAVE_SYS_POLL_H
2909
2910 #else
2911     FD_ZERO (&input);
2912     FD_ZERO (&output);
2913     FD_ZERO (&except);
2914 #endif
2915     nfds = 0;
2916     for (i = 0; i<no; i++)
2917     {
2918         ZOOM_connection c = cs[i];
2919         int fd, mask;
2920         int this_timeout;
2921
2922         if (!c)
2923             continue;
2924         fd = z3950_connection_socket(c);
2925         mask = z3950_connection_mask(c);
2926
2927         if (fd == -1)
2928             continue;
2929         if (max_fd < fd)
2930             max_fd = fd;
2931
2932         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2933         if (this_timeout != -1 && this_timeout < timeout)
2934             timeout = this_timeout;
2935 #if HAVE_SYS_POLL_H
2936         if (mask)
2937         {
2938             short poll_events = 0;
2939
2940             if (mask & ZOOM_SELECT_READ)
2941                 poll_events += POLLIN;
2942             if (mask & ZOOM_SELECT_WRITE)
2943                 poll_events += POLLOUT;
2944             if (mask & ZOOM_SELECT_EXCEPT)
2945                 poll_events += POLLERR;
2946             pollfds[nfds].fd = fd;
2947             pollfds[nfds].events = poll_events;
2948             pollfds[nfds].revents = 0;
2949             poll_cs[nfds] = c;
2950             nfds++;
2951         }
2952 #else
2953         if (mask & ZOOM_SELECT_READ)
2954         {
2955             FD_SET (fd, &input);
2956             nfds++;
2957         }
2958         if (mask & ZOOM_SELECT_WRITE)
2959         {
2960             FD_SET (fd, &output);
2961             nfds++;
2962         }
2963         if (mask & ZOOM_SELECT_EXCEPT)
2964         {
2965             FD_SET (fd, &except);
2966             nfds++;
2967         }
2968 #endif
2969     }
2970     if (timeout >= 5000)
2971         timeout = 30;
2972
2973     if (!nfds)
2974         return 0;
2975
2976 #if HAVE_SYS_POLL_H
2977     r = poll (pollfds, nfds, timeout * 1000);
2978     for (i = 0; i<nfds; i++)
2979     {
2980         ZOOM_connection c = poll_cs[i];
2981         if (r && c->mask)
2982         {
2983             int mask = 0;
2984             if (pollfds[i].revents & POLLIN)
2985                 mask += ZOOM_SELECT_READ;
2986             if (pollfds[i].revents & POLLOUT)
2987                 mask += ZOOM_SELECT_WRITE;
2988             if (pollfds[i].revents & POLLERR)
2989                 mask += ZOOM_SELECT_EXCEPT;
2990             if (mask)
2991                 ZOOM_connection_do_io(c, mask);
2992         }
2993         else if (r == 0 && c->mask)
2994         {
2995             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2996             /* timeout and this connection was waiting */
2997             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2998             do_close (c);
2999             ZOOM_connection_put_event(c, event);
3000         }
3001     }
3002 #else
3003     tv.tv_sec = timeout;
3004     tv.tv_usec = 0;
3005     yaz_log (LOG_DEBUG, "select start");
3006     r = select (max_fd+1, &input, &output, &except, &tv);
3007     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3008     for (i = 0; i<no; i++)
3009     {
3010         ZOOM_connection c = cs[i];
3011         int fd, mask;
3012
3013         if (!c)
3014             continue;
3015         fd = z3950_connection_socket(c);
3016         mask = 0;
3017         if (r && c->mask)
3018         {
3019             /* no timeout and real socket */
3020             if (FD_ISSET(fd, &input))
3021                 mask += ZOOM_SELECT_READ;
3022             if (FD_ISSET(fd, &output))
3023                 mask += ZOOM_SELECT_WRITE;
3024             if (FD_ISSET(fd, &except))
3025                 mask += ZOOM_SELECT_EXCEPT;
3026             if (mask)
3027                 ZOOM_connection_do_io(c, mask);
3028         }
3029         if (r == 0 && c->mask)
3030         {
3031             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3032             /* timeout and this connection was waiting */
3033             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3034             do_close (c);
3035             yaz_log (LOG_DEBUG, "timeout");
3036             ZOOM_connection_put_event(c, event);
3037         }
3038     }
3039 #endif
3040     for (i = 0; i<no; i++)
3041     {
3042         ZOOM_connection c = cs[i];
3043         ZOOM_Event event;
3044         if (c && (event = ZOOM_connection_get_event(c)))
3045         {
3046             ZOOM_Event_destroy (event);
3047             return i+1;
3048         }
3049     }
3050     return 0;
3051 }