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 1.36 2003-05-30 10:24:58 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     {
  72         c->last_event = ZOOM_EVENT_NONE;
  73         return 0;
  74     }
  75     assert (c->m_queue_back);
  76     c->m_queue_front = event->prev;
  77     if (c->m_queue_front)
  78     {
  79         assert (c->m_queue_back);
  80         c->m_queue_front->next = 0;
  81     }
  82     else
  83         c->m_queue_back = 0;
  84     c->last_event = event->kind;
  85     return event;
  86 }
  87
  88
  89 static void set_dset_error (ZOOM_connection c, int error,
  90                             const char *dset,
  91                             const char *addinfo, const char *addinfo2)
  92 {
  93     xfree (c->addinfo);
  94     c->addinfo = 0;
  95     c->error = error;
  96     c->diagset = dset;
  97     if (addinfo && addinfo2)
  98     {
  99         c->addinfo = xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
 100         strcpy(c->addinfo, addinfo);
 101         strcat(c->addinfo, addinfo2);
 102     }
 103     else if (addinfo)
 104         c->addinfo = xstrdup(addinfo);
 105     if (error)
 106         yaz_log(LOG_DEBUG, "Error %s %s:%d %s %s",
 107                 c->host_port ? c->host_port : "<>", dset, error,
 108                 addinfo ? addinfo : "",
 109                 addinfo2 ? addinfo2 : "");
 110 }
 111
 112 #if HAVE_XML2
 113 static void set_HTTP_error (ZOOM_connection c, int error,
 114                             const char *addinfo, const char *addinfo2)
 115 {
 116     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 117 }
 118 #endif
 119
 120 static void set_ZOOM_error (ZOOM_connection c, int error,
 121                             const char *addinfo)
 122 {
 123     set_dset_error(c, error, "ZOOM", addinfo, 0);
 124 }
 125
 126 static void clear_error (ZOOM_connection c)
 127 {
 128
 129     switch (c->error)
 130     {
 131     case ZOOM_ERROR_CONNECT:
 132     case ZOOM_ERROR_MEMORY:
 133     case ZOOM_ERROR_DECODE:
 134     case ZOOM_ERROR_CONNECTION_LOST:
 135     case ZOOM_ERROR_INIT:
 136     case ZOOM_ERROR_INTERNAL:
 137     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 138         break;
 139     default:
 140         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 141     }
 142 }
 143
 144 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 145 {
 146     ZOOM_task *taskp = &c->tasks;
 147     while (*taskp)
 148         taskp = &(*taskp)->next;
 149     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 150     (*taskp)->running = 0;
 151     (*taskp)->which = which;
 152     (*taskp)->next = 0;
 153     clear_error (c);
 154     return *taskp;
 155 }
 156
 157 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 158 {
 159     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 160
 161     task->next = c->tasks;
 162     c->tasks = task;
 163
 164     task->running = 0;
 165     task->which = which;
 166     clear_error (c);
 167     return task;
 168 }
 169
 170 void ZOOM_connection_remove_task (ZOOM_connection c)
 171 {
 172     ZOOM_task task = c->tasks;
 173
 174     if (task)
 175     {
 176         c->tasks = task->next;
 177         switch (task->which)
 178         {
 179         case ZOOM_TASK_SEARCH:
 180
 181             ZOOM_resultset_destroy (task->u.search.resultset);
 182             break;
 183         case ZOOM_TASK_RETRIEVE:
 184             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 185             break;
 186         case ZOOM_TASK_CONNECT:
 187             break;
 188         case ZOOM_TASK_SCAN:
 189             ZOOM_scanset_destroy (task->u.scan.scan);
 190             break;
 191         case ZOOM_TASK_PACKAGE:
 192             ZOOM_package_destroy (task->u.package);
 193             break;
 194         default:
 195             assert (0);
 196         }
 197         xfree (task);
 198     }
 199 }
 200
 201 static int ZOOM_connection_exec_task (ZOOM_connection c);
 202
 203 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 204 {
 205     while (c->tasks)
 206         ZOOM_connection_remove_task(c);
 207 }
 208
 209 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 210
 211 ZOOM_API(ZOOM_connection)
 212 ZOOM_connection_create (ZOOM_options options)
 213 {
 214     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 215
 216     c->proto = PROTO_Z3950;
 217     c->cs = 0;
 218     c->mask = 0;
 219     c->reconnect_ok = 0;
 220     c->state = STATE_IDLE;
 221     c->addinfo = 0;
 222     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 223     c->buf_in = 0;
 224     c->len_in = 0;
 225     c->buf_out = 0;
 226     c->len_out = 0;
 227     c->resultsets = 0;
 228
 229     c->options = ZOOM_options_create_with_parent(options);
 230
 231     c->host_port = 0;
 232     c->path = 0;
 233     c->proxy = 0;
 234
 235     c->charset = c->lang = 0;
 236
 237     c->cookie_out = 0;
 238     c->cookie_in = 0;
 239     c->client_IP = 0;
 240     c->tasks = 0;
 241
 242     c->odr_in = odr_createmem (ODR_DECODE);
 243     c->odr_out = odr_createmem (ODR_ENCODE);
 244
 245     c->async = 0;
 246     c->support_named_resultsets = 0;
 247     c->last_event = ZOOM_EVENT_NONE;
 248
 249     c->m_queue_front = 0;
 250     c->m_queue_back = 0;
 251     return c;
 252 }
 253
 254 /* set database names. Take local databases (if set); otherwise
 255    take databases given in ZURL (if set); otherwise use Default */
 256 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 257                                  int *num)
 258 {
 259     char **databaseNames;
 260     const char *c;
 261     int no = 2;
 262     const char *cp = ZOOM_options_get (options, "databaseName");
 263
 264     if (!cp || !*cp)
 265     {
 266         if (strncmp (con->host_port, "unix:", 5) == 0)
 267             cp = strchr (con->host_port+5, ':');
 268         else
 269             cp = strchr (con->host_port, '/');
 270         if (cp)
 271             cp++;
 272     }
 273     if (cp)
 274     {
 275         c = cp;
 276         while ((c = strchr(c, '+')))
 277         {
 278             c++;
 279             no++;
 280         }
 281     }
 282     else
 283         cp = "Default";
 284     databaseNames = (char**)
 285         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 286     no = 0;
 287     while (*cp)
 288     {
 289         c = strchr (cp, '+');
 290         if (!c)
 291             c = cp + strlen(cp);
 292         else if (c == cp)
 293         {
 294             cp++;
 295             continue;
 296         }
 297         /* cp ptr to first char of db name, c is char
 298            following db name */
 299         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 300         memcpy (databaseNames[no], cp, c-cp);
 301         databaseNames[no++][c-cp] = '\0';
 302         cp = c;
 303         if (*cp)
 304             cp++;
 305     }
 306     databaseNames[no] = NULL;
 307     *num = no;
 308     return databaseNames;
 309 }
 310
 311 ZOOM_API(ZOOM_connection)
 312 ZOOM_connection_new (const char *host, int portnum)
 313 {
 314     ZOOM_connection c = ZOOM_connection_create (0);
 315
 316     ZOOM_connection_connect (c, host, portnum);
 317     return c;
 318 }
 319
 320 ZOOM_API(void)
 321 ZOOM_connection_connect(ZOOM_connection c,
 322                         const char *host, int portnum)
 323 {
 324     const char *val;
 325     ZOOM_task task;
 326
 327     if (c->cs)
 328     {
 329         yaz_log (LOG_DEBUG, "reconnect");
 330         c->reconnect_ok = 1;
 331         return;
 332     }
 333     yaz_log(LOG_DEBUG, "connect");
 334     xfree (c->proxy);
 335     val = ZOOM_options_get (c->options, "proxy");
 336     if (val && *val)
 337         c->proxy = xstrdup (val);
 338     else
 339         c->proxy = 0;
 340
 341     xfree (c->charset);
 342     val = ZOOM_options_get (c->options, "charset");
 343     if (val && *val)
 344         c->charset = xstrdup (val);
 345     else
 346         c->charset = 0;
 347
 348     xfree (c->lang);
 349     val = ZOOM_options_get (c->options, "lang");
 350     if (val && *val)
 351         c->lang = xstrdup (val);
 352     else
 353         c->lang = 0;
 354
 355     xfree (c->host_port);
 356     if (portnum)
 357     {
 358         char hostn[128];
 359         sprintf (hostn, "%.80s:%d", host, portnum);
 360         c->host_port = xstrdup(hostn);
 361     }
 362     else
 363         c->host_port = xstrdup(host);
 364
 365     ZOOM_options_set(c->options, "host", c->host_port);
 366
 367     val = ZOOM_options_get (c->options, "cookie");
 368     if (val && *val)
 369         c->cookie_out = xstrdup (val);
 370
 371     val = ZOOM_options_get (c->options, "clientIP");
 372     if (val && *val)
 373         c->client_IP = xstrdup (val);
 374
 375     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 376
 377     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 378
 379     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 380
 381     if (!c->async)
 382     {
 383         while (ZOOM_event (1, &c))
 384             ;
 385     }
 386 }
 387
 388 ZOOM_API(ZOOM_query)
 389 ZOOM_query_create(void)
 390 {
 391     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 392
 393     s->refcount = 1;
 394     s->z_query = 0;
 395     s->sort_spec = 0;
 396     s->odr = odr_createmem (ODR_ENCODE);
 397     s->query_string = 0;
 398
 399     return s;
 400 }
 401
 402 ZOOM_API(void)
 403 ZOOM_query_destroy(ZOOM_query s)
 404 {
 405     if (!s)
 406         return;
 407
 408     (s->refcount)--;
 409     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 410     if (s->refcount == 0)
 411     {
 412         odr_destroy (s->odr);
 413         xfree (s);
 414     }
 415 }
 416
 417 ZOOM_API(int)
 418 ZOOM_query_prefix(ZOOM_query s, const char *str)
 419 {
 420     s->query_string = odr_strdup(s->odr, str);
 421     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 422     s->z_query->which = Z_Query_type_1;
 423     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 424     if (!s->z_query->u.type_1)
 425         return -1;
 426     return 0;
 427 }
 428
 429 ZOOM_API(int)
 430 ZOOM_query_cql(ZOOM_query s, const char *str)
 431 {
 432     Z_External *ext;
 433
 434     s->query_string = odr_strdup(s->odr, str);
 435
 436     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 437     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 438     ext->indirect_reference = 0;
 439     ext->descriptor = 0;
 440     ext->which = Z_External_CQL;
 441     ext->u.cql = s->query_string;
 442
 443     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 444     s->z_query->which = Z_Query_type_104;
 445     s->z_query->u.type_104 =  ext;
 446
 447     return 0;
 448 }
 449
 450 ZOOM_API(int)
 451 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 452 {
 453     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 454     if (!s->sort_spec)
 455         return -1;
 456     return 0;
 457 }
 458
 459 static zoom_ret do_write(ZOOM_connection c);
 460
 461 ZOOM_API(void)
 462 ZOOM_connection_destroy(ZOOM_connection c)
 463 {
 464     ZOOM_resultset r;
 465     if (!c)
 466         return;
 467     if (c->cs)
 468         cs_close (c->cs);
 469     for (r = c->resultsets; r; r = r->next)
 470         r->connection = 0;
 471
 472     xfree (c->buf_in);
 473     xfree (c->addinfo);
 474     odr_destroy (c->odr_in);
 475     odr_destroy (c->odr_out);
 476     ZOOM_options_destroy (c->options);
 477     ZOOM_connection_remove_tasks (c);
 478     xfree (c->host_port);
 479     xfree (c->path);
 480     xfree (c->proxy);
 481     xfree (c->charset);
 482     xfree (c->lang);
 483     xfree (c->cookie_out);
 484     xfree (c->cookie_in);
 485     xfree (c->client_IP);
 486     xfree (c);
 487 }
 488
 489 void ZOOM_resultset_addref (ZOOM_resultset r)
 490 {
 491     if (r)
 492     {
 493         (r->refcount)++;
 494         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 495                  r, r->refcount);
 496     }
 497 }
 498 ZOOM_resultset ZOOM_resultset_create ()
 499 {
 500     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 501
 502     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 503     r->refcount = 1;
 504     r->size = 0;
 505     r->odr = odr_createmem (ODR_ENCODE);
 506     r->start = 0;
 507     r->piggyback = 1;
 508     r->setname = 0;
 509     r->schema = 0;
 510     r->count = 0;
 511     r->step = 0;
 512     r->record_cache = 0;
 513     r->r_sort_spec = 0;
 514     r->query = 0;
 515     r->connection = 0;
 516     r->next = 0;
 517     return r;
 518 }
 519
 520 ZOOM_API(ZOOM_resultset)
 521 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 522 {
 523     ZOOM_resultset r;
 524     ZOOM_query s = ZOOM_query_create();
 525
 526     ZOOM_query_prefix (s, q);
 527
 528     r = ZOOM_connection_search (c, s);
 529     ZOOM_query_destroy (s);
 530     return r;
 531 }
 532
 533 ZOOM_API(ZOOM_resultset)
 534 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 535 {
 536     ZOOM_resultset r = ZOOM_resultset_create ();
 537     ZOOM_task task;
 538     const char *cp;
 539
 540     r->r_sort_spec = q->sort_spec;
 541     r->query = q;
 542
 543     r->options = ZOOM_options_create_with_parent(c->options);
 544
 545     r->start = ZOOM_options_get_int(r->options, "start", 0);
 546     r->count = ZOOM_options_get_int(r->options, "count", 0);
 547     r->step = ZOOM_options_get_int(r->options, "step", 0);
 548     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 549     cp = ZOOM_options_get (r->options, "setname");
 550     if (cp)
 551         r->setname = xstrdup(cp);
 552     cp = ZOOM_options_get (r->options, "schema");
 553     if (cp)
 554         r->schema = xstrdup(cp);
 555
 556     r->connection = c;
 557
 558     r->next = c->resultsets;
 559     c->resultsets = r;
 560
 561     if (c->host_port && c->proto == PROTO_HTTP)
 562     {
 563         if (!c->cs)
 564         {
 565             yaz_log(LOG_DEBUG, "NO COMSTACK");
 566             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 567         }
 568         else
 569         {
 570             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 571             c->reconnect_ok = 1;
 572         }
 573     }
 574
 575     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 576     task->u.search.resultset = r;
 577     ZOOM_resultset_addref (r);
 578
 579     (q->refcount)++;
 580
 581     if (!c->async)
 582     {
 583         while (ZOOM_event (1, &c))
 584             ;
 585     }
 586     return r;
 587 }
 588
 589 ZOOM_API(void)
 590 ZOOM_resultset_destroy(ZOOM_resultset r)
 591 {
 592     if (!r)
 593         return;
 594     (r->refcount)--;
 595     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 596              r, r->refcount);
 597     if (r->refcount == 0)
 598     {
 599         ZOOM_record_cache rc;
 600
 601         for (rc = r->record_cache; rc; rc = rc->next)
 602         {
 603             if (rc->rec.wrbuf_marc)
 604                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 605             if (rc->rec.wrbuf_iconv)
 606                 wrbuf_free (rc->rec.wrbuf_iconv, 1);
 607         }
 608         if (r->connection)
 609         {
 610             /* remove ourselves from the resultsets in connection */
 611             ZOOM_resultset *rp = &r->connection->resultsets;
 612             while (1)
 613             {
 614                 assert (*rp);   /* we must be in this list!! */
 615                 if (*rp == r)
 616                 {   /* OK, we're here - take us out of it */
 617                     *rp = (*rp)->next;
 618                     break;
 619                 }
 620                 rp = &(*rp)->next;
 621             }
 622         }
 623         ZOOM_query_destroy (r->query);
 624         ZOOM_options_destroy (r->options);
 625         odr_destroy (r->odr);
 626         xfree (r->setname);
 627         xfree (r->schema);
 628         xfree (r);
 629     }
 630 }
 631
 632 ZOOM_API(size_t)
 633 ZOOM_resultset_size (ZOOM_resultset r)
 634 {
 635     return r->size;
 636 }
 637
 638 static void do_close (ZOOM_connection c)
 639 {
 640     if (c->cs)
 641         cs_close(c->cs);
 642     c->cs = 0;
 643     c->mask = 0;
 644     c->state = STATE_IDLE;
 645 }
 646
 647 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 648                                      int force_sync, int start, int count)
 649 {
 650     ZOOM_task task;
 651     ZOOM_connection c;
 652     const char *cp;
 653
 654     if (!r)
 655         return;
 656     c = r->connection;
 657     if (!c)
 658         return;
 659
 660     if (c->host_port && c->proto == PROTO_HTTP)
 661     {
 662         if (!c->cs)
 663         {
 664             yaz_log(LOG_DEBUG, "NO COMSTACK");
 665             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 666         }
 667         else
 668         {
 669             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 670             c->reconnect_ok = 1;
 671         }
 672     }
 673     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 674     task->u.retrieve.resultset = r;
 675     task->u.retrieve.start = start;
 676     task->u.retrieve.count = count;
 677
 678     cp = ZOOM_options_get (r->options, "schema");
 679     if (cp)
 680     {
 681         if (!r->schema || strcmp(r->schema, cp))
 682         {
 683             xfree(r->schema);
 684             r->schema = xstrdup(cp);
 685         }
 686     }
 687
 688     ZOOM_resultset_addref (r);
 689
 690     if (!r->connection->async || force_sync)
 691         while (r->connection && ZOOM_event (1, &r->connection))
 692             ;
 693 }
 694
 695 ZOOM_API(void)
 696 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 697                         size_t start, size_t count)
 698 {
 699     int force_present = 0;
 700
 701     if (!r)
 702         return ;
 703     if (count && recs)
 704         force_present = 1;
 705     ZOOM_resultset_retrieve (r, force_present, start, count);
 706     if (force_present)
 707     {
 708         size_t i;
 709         for (i = 0; i< count; i++)
 710             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 711     }
 712 }
 713
 714 static zoom_ret do_connect (ZOOM_connection c)
 715 {
 716     void *add;
 717     const char *effective_host;
 718
 719     if (c->proxy)
 720         effective_host = c->proxy;
 721     else
 722         effective_host = c->host_port;
 723
 724     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 725
 726     assert (!c->cs);
 727     c->cs = cs_create_host (effective_host, 0, &add);
 728
 729     if (c->cs && c->cs->protocol == PROTO_HTTP)
 730     {
 731 #if HAVE_XML2
 732         const char *path = 0;
 733
 734         c->proto = PROTO_HTTP;
 735         cs_get_host_args(c->host_port, &path);
 736         xfree(c->path);
 737         c->path = xmalloc(strlen(path)+2);
 738         c->path[0] = '/';
 739         strcpy (c->path+1, path);
 740 #else
 741         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 742         do_close(c);
 743         return zoom_complete;
 744 #endif
 745     }
 746     if (c->cs)
 747     {
 748         int ret = cs_connect (c->cs, add);
 749         if (ret == 0)
 750         {
 751             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 752             ZOOM_connection_put_event(c, event);
 753             if (c->proto == PROTO_Z3950)
 754                 ZOOM_connection_send_init(c);
 755             else
 756             {
 757                 /* no init request for SRW .. */
 758                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 759                 ZOOM_connection_remove_task (c);
 760                 c->mask = 0;
 761                 ZOOM_connection_exec_task (c);
 762             }
 763             c->state = STATE_ESTABLISHED;
 764             return zoom_pending;
 765         }
 766         else if (ret > 0)
 767         {
 768             c->state = STATE_CONNECTING;
 769             c->mask = ZOOM_SELECT_EXCEPT;
 770             if (c->cs->io_pending & CS_WANT_WRITE)
 771                 c->mask += ZOOM_SELECT_WRITE;
 772             if (c->cs->io_pending & CS_WANT_READ)
 773                 c->mask += ZOOM_SELECT_READ;
 774             return zoom_pending;
 775         }
 776     }
 777     c->state = STATE_IDLE;
 778     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 779     return zoom_complete;
 780 }
 781
 782 int z3950_connection_socket(ZOOM_connection c)
 783 {
 784     if (c->cs)
 785         return cs_fileno(c->cs);
 786     return -1;
 787 }
 788
 789 int z3950_connection_mask(ZOOM_connection c)
 790 {
 791     if (c->cs)
 792         return c->mask;
 793     return 0;
 794 }
 795
 796 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 797 {
 798     int i;
 799     for (i = 0; i<200; i++)
 800     {
 801         size_t len;
 802         Z_OtherInformation **oi;
 803         char buf[80];
 804         const char *val;
 805         const char *cp;
 806         int oidval;
 807
 808         sprintf (buf, "otherInfo%d", i);
 809         val = ZOOM_options_get (c->options, buf);
 810         if (!val)
 811             break;
 812         cp = strchr (val, ':');
 813         if (!cp)
 814             continue;
 815         len = cp - val;
 816         if (len >= sizeof(buf))
 817             len = sizeof(buf)-1;
 818         memcpy (buf, val, len);
 819         buf[len] = '\0';
 820         oidval = oid_getvalbyname (buf);
 821         if (oidval == VAL_NONE)
 822             continue;
 823
 824         yaz_oi_APDU(a, &oi);
 825         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 826     }
 827 }
 828
 829 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 830 {
 831     assert (a);
 832     if (c->cookie_out)
 833     {
 834         Z_OtherInformation **oi;
 835         yaz_oi_APDU(a, &oi);
 836         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 837     }
 838     if (c->client_IP)
 839     {
 840         Z_OtherInformation **oi;
 841         yaz_oi_APDU(a, &oi);
 842         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 843     }
 844     otherInfo_attach (c, a, out);
 845     if (!z_APDU(out, &a, 0, 0))
 846     {
 847         FILE *outf = fopen("/tmp/apdu.txt", "a");
 848         if (a && outf)
 849         {
 850             ODR odr_pr = odr_createmem(ODR_PRINT);
 851             fprintf (outf, "a=%p\n", a);
 852             odr_setprint(odr_pr, outf);
 853             z_APDU(odr_pr, &a, 0, 0);
 854             odr_destroy(odr_pr);
 855         }
 856         yaz_log (LOG_DEBUG, "encoding failed");
 857         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 858         odr_reset(out);
 859         return -1;
 860     }
 861
 862     return 0;
 863 }
 864
 865 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 866 {
 867     ZOOM_Event event;
 868     assert (a);
 869     if (encode_APDU(c, a, c->odr_out))
 870         return zoom_complete;
 871     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 872     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 873     ZOOM_connection_put_event (c, event);
 874     odr_reset(c->odr_out);
 875     return do_write (c);
 876 }
 877
 878 /* returns 1 if PDU was sent OK (still pending )
 879            0 if PDU was not sent OK (nothing to wait for)
 880 */
 881
 882 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 883 {
 884     const char *impname;
 885     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 886     Z_InitRequest *ireq = apdu->u.initRequest;
 887     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 888         odr_malloc(c->odr_out, sizeof(*auth));
 889     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 890     const char *auth_userId = ZOOM_options_get (c->options, "user");
 891     const char *auth_password = ZOOM_options_get (c->options, "pass");
 892
 893     ODR_MASK_SET(ireq->options, Z_Options_search);
 894     ODR_MASK_SET(ireq->options, Z_Options_present);
 895     ODR_MASK_SET(ireq->options, Z_Options_scan);
 896     ODR_MASK_SET(ireq->options, Z_Options_sort);
 897     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 898     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 899
 900     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 901     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 902     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 903
 904     impname = ZOOM_options_get (c->options, "implementationName");
 905     ireq->implementationName =
 906         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 907     strcpy (ireq->implementationName, "");
 908     if (impname)
 909     {
 910         strcat (ireq->implementationName, impname);
 911         strcat (ireq->implementationName, "/");
 912     }
 913     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 914
 915     *ireq->maximumRecordSize =
 916         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 917     *ireq->preferredMessageSize =
 918         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 919
 920     if (auth_groupId || auth_password)
 921     {
 922         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 923         int i = 0;
 924         pass->groupId = 0;
 925         if (auth_groupId && *auth_groupId)
 926         {
 927             pass->groupId = (char *)
 928                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 929             strcpy(pass->groupId, auth_groupId);
 930             i++;
 931         }
 932         pass->userId = 0;
 933         if (auth_userId && *auth_userId)
 934         {
 935             pass->userId = (char *)
 936                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 937             strcpy(pass->userId, auth_userId);
 938             i++;
 939         }
 940         pass->password = 0;
 941         if (auth_password && *auth_password)
 942         {
 943             pass->password = (char *)
 944                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 945             strcpy(pass->password, auth_password);
 946             i++;
 947         }
 948         if (i)
 949         {
 950             auth->which = Z_IdAuthentication_idPass;
 951             auth->u.idPass = pass;
 952             ireq->idAuthentication = auth;
 953         }
 954     }
 955     else if (auth_userId)
 956     {
 957         auth->which = Z_IdAuthentication_open;
 958         auth->u.open = (char *)
 959             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 960         strcpy(auth->u.open, auth_userId);
 961         ireq->idAuthentication = auth;
 962     }
 963     if (c->proxy)
 964         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 965                                  VAL_PROXY, 1, c->host_port);
 966     if (c->charset||c->lang)
 967     {
 968         Z_OtherInformation **oi;
 969         Z_OtherInformationUnit *oi_unit;
 970
 971         yaz_oi_APDU(apdu, &oi);
 972
 973         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 974         {
 975             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 976
 977             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 978             oi_unit->information.externallyDefinedInfo =
 979                 yaz_set_proposal_charneg
 980                 (c->odr_out,
 981                  (const char **)&c->charset, (c->charset) ? 1:0,
 982                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 983         }
 984     }
 985     assert (apdu);
 986     return send_APDU (c, apdu);
 987 }
 988
 989 #if HAVE_XML2
 990 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
 991 {
 992     char ctype[50];
 993     Z_SOAP_Handler h[2] = {
 994         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 995         {0, 0, 0}
 996     };
 997     ODR o = odr_createmem(ODR_ENCODE);
 998     int ret;
 999     Z_SOAP *p = odr_malloc(o, sizeof(*p));
1000     Z_GDU *gdu;
1001     ZOOM_Event event;
1002
1003     gdu = z_get_HTTP_Request(c->odr_out);
1004     gdu->u.HTTP_Request->path = c->path;
1005
1006     if (c->host_port)
1007     {
1008         const char *cp0 = strstr(c->host_port, "://");
1009         const char *cp1 = 0;
1010         if (cp0)
1011             cp0 = cp0+3;
1012         else
1013             cp0 = c->host_port;
1014
1015         cp1 = strchr(cp0, '/');
1016         if (!cp1)
1017             cp1 = cp0+strlen(cp0);
1018
1019         if (cp0 && cp1)
1020         {
1021             char *h = odr_malloc(c->odr_out, cp1 - cp0 + 1);
1022             memcpy (h, cp0, cp1 - cp0);
1023             h[cp1-cp0] = '\0';
1024             z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1025                               "host", h);
1026         }
1027     }
1028
1029     strcpy(ctype, "text/xml");
1030     if (c->charset && strlen(c->charset) < 20)
1031     {
1032         strcat(ctype, "; charset=");
1033         strcat(ctype, c->charset);
1034     }
1035     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1036                       "Content-Type", ctype);
1037     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1038                       "SOAPAction", "\"\"");
1039     p->which = Z_SOAP_generic;
1040     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1041     p->u.generic->no = 0;
1042     p->u.generic->ns = 0;
1043     p->u.generic->p = sr;
1044     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1045
1046     ret = z_soap_codec_enc(o, &p,
1047                            &gdu->u.HTTP_Request->content_buf,
1048                            &gdu->u.HTTP_Request->content_len, h,
1049                            c->charset);
1050
1051     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1052         return zoom_complete;
1053     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1054
1055     odr_destroy(o);
1056
1057     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1058     ZOOM_connection_put_event (c, event);
1059     odr_reset(c->odr_out);
1060     return do_write (c);
1061 }
1062 #endif
1063
1064 #if HAVE_XML2
1065 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1066 {
1067     int i;
1068     ZOOM_resultset resultset = 0;
1069     Z_SRW_PDU *sr = 0;
1070     const char *recordPacking = 0;
1071
1072     if (c->error)                  /* don't continue on error */
1073         return zoom_complete;
1074     assert (c->tasks);
1075     if (c->tasks->which == ZOOM_TASK_SEARCH)
1076     {
1077         resultset = c->tasks->u.search.resultset;
1078         resultset->setname = xstrdup ("default");
1079         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1080     }
1081     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1082     {
1083         resultset = c->tasks->u.retrieve.resultset;
1084
1085         resultset->start = c->tasks->u.retrieve.start;
1086         resultset->count = c->tasks->u.retrieve.count;
1087
1088         if (resultset->start >= resultset->size)
1089             return zoom_complete;
1090         if (resultset->start + resultset->count > resultset->size)
1091             resultset->count = resultset->size - resultset->start;
1092
1093         for (i = 0; i<resultset->count; i++)
1094         {
1095             ZOOM_record rec =
1096                 record_cache_lookup (resultset, i + resultset->start);
1097             if (!rec)
1098                 break;
1099         }
1100         if (i == resultset->count)
1101             return zoom_complete;
1102     }
1103     assert(resultset->query);
1104
1105     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1106
1107     if (resultset->query->z_query->which == Z_Query_type_104
1108         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1109     {
1110
1111         sr->u.request->query_type = Z_SRW_query_type_cql;
1112         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1113     }
1114     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1115              resultset->query->z_query->u.type_1)
1116     {
1117         sr->u.request->query_type = Z_SRW_query_type_pqf;
1118         sr->u.request->query.pqf = resultset->query->query_string;
1119     }
1120     else
1121     {
1122         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1123         return zoom_complete;
1124     }
1125     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1126     sr->u.request->maximumRecords = odr_intdup (
1127         c->odr_out, resultset->step>0 ? resultset->step : resultset->count);
1128     sr->u.request->recordSchema = resultset->schema;
1129
1130     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1131
1132     if (recordPacking)
1133         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1134
1135     return send_srw(c, sr);
1136 }
1137 #else
1138 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1139 {
1140     return zoom_complete;
1141 }
1142 #endif
1143
1144 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1145 {
1146     ZOOM_resultset r;
1147     int lslb, ssub, mspn;
1148     const char *syntax;
1149     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1150     Z_SearchRequest *search_req = apdu->u.searchRequest;
1151     const char *elementSetName;
1152     const char *smallSetElementSetName;
1153     const char *mediumSetElementSetName;
1154
1155     assert (c->tasks);
1156     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1157
1158     r = c->tasks->u.search.resultset;
1159
1160     elementSetName =
1161         ZOOM_options_get (r->options, "elementSetName");
1162     smallSetElementSetName  =
1163         ZOOM_options_get (r->options, "smallSetElementSetName");
1164     mediumSetElementSetName =
1165         ZOOM_options_get (r->options, "mediumSetElementSetName");
1166
1167     if (!smallSetElementSetName)
1168         smallSetElementSetName = elementSetName;
1169
1170     if (!mediumSetElementSetName)
1171         mediumSetElementSetName = elementSetName;
1172
1173     assert (r);
1174     assert (r->query);
1175
1176     /* prepare query for the search request */
1177     search_req->query = r->query->z_query;
1178
1179     search_req->databaseNames =
1180         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1181
1182     /* get syntax (no need to provide unless piggyback is in effect) */
1183     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1184
1185     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1186     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1187     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1188     if (lslb != -1 && ssub != -1 && mspn != -1)
1189     {
1190         /* So're a Z39.50 expert? Let's hope you don't do sort */
1191         *search_req->largeSetLowerBound = lslb;
1192         *search_req->smallSetUpperBound = ssub;
1193         *search_req->mediumSetPresentNumber = mspn;
1194     }
1195     else if (r->start == 0 && r->count > 0
1196              && r->piggyback && !r->r_sort_spec && !r->schema)
1197     {
1198         /* Regular piggyback - do it unless we're going to do sort */
1199         *search_req->largeSetLowerBound = 2000000000;
1200         *search_req->smallSetUpperBound = 0;
1201         *search_req->mediumSetPresentNumber = r->step>0 ? r->step : r->count;
1202         smallSetElementSetName = 0;
1203     }
1204     else
1205     {
1206         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1207         smallSetElementSetName = 0;
1208         mediumSetElementSetName = 0;
1209         syntax = 0;
1210     }
1211     if (smallSetElementSetName && *smallSetElementSetName)
1212     {
1213         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1214             odr_malloc (c->odr_out, sizeof(*esn));
1215
1216         esn->which = Z_ElementSetNames_generic;
1217         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1218         search_req->smallSetElementSetNames = esn;
1219     }
1220     if (mediumSetElementSetName && *mediumSetElementSetName)
1221     {
1222         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1223             odr_malloc (c->odr_out, sizeof(*esn));
1224
1225         esn->which = Z_ElementSetNames_generic;
1226         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1227         search_req->mediumSetElementSetNames = esn;
1228     }
1229     if (syntax)
1230         search_req->preferredRecordSyntax =
1231             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1232
1233     if (!r->setname)
1234     {
1235         if (c->support_named_resultsets)
1236         {
1237             char setname[14];
1238             int ord;
1239             /* find the lowest unused ordinal so that we re-use
1240                result sets on the server. */
1241             for (ord = 1; ; ord++)
1242             {
1243                 ZOOM_resultset rp;
1244                 sprintf (setname, "%d", ord);
1245                 for (rp = c->resultsets; rp; rp = rp->next)
1246                     if (rp->setname && !strcmp (rp->setname, setname))
1247                         break;
1248                 if (!rp)
1249                     break;
1250             }
1251             r->setname = xstrdup (setname);
1252             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1253         }
1254         else
1255             r->setname = xstrdup ("default");
1256         ZOOM_options_set (r->options, "setname", r->setname);
1257     }
1258     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1259     /* send search request */
1260     return send_APDU (c, apdu);
1261 }
1262
1263 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1264 {
1265     int oclass;
1266     Z_DefaultDiagFormat *r;
1267     char *addinfo = 0;
1268
1269     xfree (c->addinfo);
1270     c->addinfo = 0;
1271     if (p->which != Z_DiagRec_defaultFormat)
1272     {
1273         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1274         return;
1275     }
1276     r = p->u.defaultFormat;
1277     switch (r->which)
1278     {
1279     case Z_DefaultDiagFormat_v2Addinfo:
1280         addinfo = r->u.v2Addinfo;
1281         break;
1282     case Z_DefaultDiagFormat_v3Addinfo:
1283         addinfo = r->u.v3Addinfo;
1284         break;
1285     }
1286     set_dset_error(c, *r->condition,
1287                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1288                    addinfo, 0);
1289 }
1290
1291 ZOOM_API(ZOOM_record)
1292 ZOOM_record_clone (ZOOM_record srec)
1293 {
1294     char *buf;
1295     int size;
1296     ODR odr_enc;
1297     ZOOM_record nrec;
1298
1299     odr_enc = odr_createmem(ODR_ENCODE);
1300     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1301         return 0;
1302     buf = odr_getbuf (odr_enc, &size, 0);
1303
1304     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1305     nrec->odr = odr_createmem(ODR_DECODE);
1306     nrec->wrbuf_marc = 0;
1307     nrec->wrbuf_iconv = 0;
1308     nrec->record_charset = 0;
1309     if (srec->record_charset)
1310         nrec->record_charset = odr_strdup(nrec->odr, srec->record_charset);
1311     odr_setbuf (nrec->odr, buf, size, 0);
1312     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1313
1314     odr_destroy (odr_enc);
1315     return nrec;
1316 }
1317
1318 ZOOM_API(ZOOM_record)
1319 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1320 {
1321     return record_cache_lookup (s, pos);
1322 }
1323
1324 ZOOM_API(ZOOM_record)
1325 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1326 {
1327     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1328
1329     if (!rec)
1330     {
1331         ZOOM_resultset_retrieve (r, 1, pos, 1);
1332         rec = ZOOM_resultset_record_immediate (r, pos);
1333     }
1334     return rec;
1335 }
1336
1337 ZOOM_API(void)
1338 ZOOM_record_destroy (ZOOM_record rec)
1339 {
1340     if (!rec)
1341         return;
1342     if (rec->wrbuf_marc)
1343         wrbuf_free (rec->wrbuf_marc, 1);
1344     odr_destroy (rec->odr);
1345     xfree (rec);
1346 }
1347
1348 static const char *record_iconv_return(ZOOM_record rec, int *len,
1349                                        const char *buf, int sz)
1350 {
1351     char to[40];
1352     char from[40];
1353     yaz_iconv_t cd = 0;
1354
1355     *from = '\0';
1356     strcpy(to, "UTF-8");
1357     if (rec->record_charset)
1358     {
1359         /* Use "from,to" or just "from" */
1360         const char *cp =strchr(rec->record_charset, ',');
1361         int clen = strlen(rec->record_charset);
1362         if (cp && cp[1])
1363         {
1364             strncpy( to, cp+1, sizeof(to)-1);
1365             to[sizeof(to)-1] = '\0';
1366             clen = cp - rec->record_charset;
1367         }
1368         if (clen > sizeof(from)-1)
1369             clen = sizeof(from)-1;
1370
1371         if (clen)
1372             strncpy(from, rec->record_charset, clen);
1373         from[clen] = '\0';
1374     }
1375
1376     if (*from && *to && (cd = yaz_iconv_open("UTF-8", rec->record_charset)))
1377     {
1378         char outbuf[12];
1379         size_t inbytesleft = sz;
1380         const char *inp = buf;
1381
1382         if (!rec->wrbuf_iconv)
1383             rec->wrbuf_iconv = wrbuf_alloc();
1384
1385         wrbuf_rewind(rec->wrbuf_iconv);
1386
1387         while (inbytesleft)
1388         {
1389             size_t outbytesleft = sizeof(outbuf);
1390             char *outp = outbuf;
1391             size_t r = yaz_iconv (cd, (char**) &inp,
1392                                   &inbytesleft,
1393                                   &outp, &outbytesleft);
1394             if (r == (size_t) (-1))
1395             {
1396                 int e = yaz_iconv_error(cd);
1397                 if (e != YAZ_ICONV_E2BIG)
1398                     break;
1399             }
1400             wrbuf_write(rec->wrbuf_iconv, outbuf, outp - outbuf);
1401         }
1402         wrbuf_puts(rec->wrbuf_iconv, "");
1403         buf = wrbuf_buf(rec->wrbuf_iconv);
1404         sz = wrbuf_len(rec->wrbuf_iconv);
1405         yaz_iconv_close(cd);
1406     }
1407     if (len)
1408         *len = sz;
1409     return buf;
1410 }
1411
1412 ZOOM_API(const char *)
1413 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1414 {
1415     Z_NamePlusRecord *npr;
1416
1417     if (len)
1418         *len = 0; /* default return */
1419
1420     if (!rec)
1421         return 0;
1422     npr = rec->npr;
1423     if (!npr)
1424         return 0;
1425     if (!strcmp (type, "database"))
1426     {
1427         if (len)
1428             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1429         return npr->databaseName;
1430     }
1431     else if (!strcmp (type, "syntax"))
1432     {
1433         const char *desc = 0;
1434         if (npr->which == Z_NamePlusRecord_databaseRecord)
1435         {
1436             Z_External *r = (Z_External *) npr->u.databaseRecord;
1437             oident *ent = oid_getentbyoid(r->direct_reference);
1438             if (ent)
1439                 desc = ent->desc;
1440         }
1441         if (!desc)
1442             desc = "none";
1443         if (len)
1444             *len = strlen(desc);
1445         return desc;
1446     }
1447     else if (!strcmp (type, "render") &&
1448              npr->which == Z_NamePlusRecord_databaseRecord)
1449     {
1450         Z_External *r = (Z_External *) npr->u.databaseRecord;
1451         oident *ent = oid_getentbyoid(r->direct_reference);
1452
1453         if (r->which == Z_External_sutrs)
1454             return record_iconv_return(rec, len,
1455                                        r->u.sutrs->buf, r->u.sutrs->len);
1456         else if (r->which == Z_External_octet)
1457         {
1458             yaz_marc_t mt;
1459             switch (ent->value)
1460             {
1461             case VAL_SOIF:
1462             case VAL_HTML:
1463             case VAL_SUTRS:
1464                 break;
1465             case VAL_TEXT_XML:
1466             case VAL_APPLICATION_XML:
1467                 break;
1468             default:
1469                 if (!rec->wrbuf_marc)
1470                     rec->wrbuf_marc = wrbuf_alloc();
1471
1472                 mt = yaz_marc_create();
1473                 wrbuf_rewind (rec->wrbuf_marc);
1474                 if (yaz_marc_decode_wrbuf (
1475                         mt, (const char *) r->u.octet_aligned->buf,
1476                         r->u.octet_aligned->len,
1477                         rec->wrbuf_marc) > 0)
1478                 {
1479                     yaz_marc_destroy(mt);
1480                     return record_iconv_return(rec, len,
1481                                                wrbuf_buf(rec->wrbuf_marc),
1482                                                wrbuf_len(rec->wrbuf_marc));
1483                 }
1484                 yaz_marc_destroy(mt);
1485             }
1486             return record_iconv_return(rec, len,
1487                                        (const char *) r->u.octet_aligned->buf,
1488                                        r->u.octet_aligned->len);
1489         }
1490         else if (r->which == Z_External_grs1)
1491         {
1492             if (!rec->wrbuf_marc)
1493                 rec->wrbuf_marc = wrbuf_alloc();
1494             wrbuf_rewind (rec->wrbuf_marc);
1495             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1496             return record_iconv_return(rec, len,
1497                                        wrbuf_buf(rec->wrbuf_marc),
1498                                        wrbuf_len(rec->wrbuf_marc));
1499         }
1500         return 0;
1501     }
1502     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1503              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1504     {
1505         Z_External *r = (Z_External *) npr->u.databaseRecord;
1506         oident *ent = oid_getentbyoid(r->direct_reference);
1507
1508         if (r->which == Z_External_sutrs)
1509             return record_iconv_return(rec, len,
1510                                        (const char *) r->u.sutrs->buf,
1511                                        r->u.sutrs->len);
1512         else if (r->which == Z_External_octet)
1513         {
1514             yaz_marc_t mt;
1515             int marc_decode_type = YAZ_MARC_MARCXML;
1516
1517             if (!strcmp(type, "oai"))
1518                 marc_decode_type = YAZ_MARC_OAIMARC;
1519             switch (ent->value)
1520             {
1521             case VAL_SOIF:
1522             case VAL_HTML:
1523             case VAL_SUTRS:
1524                 break;
1525             case VAL_TEXT_XML:
1526             case VAL_APPLICATION_XML:
1527                 break;
1528             default:
1529                 if (!rec->wrbuf_marc)
1530                     rec->wrbuf_marc = wrbuf_alloc();
1531                 wrbuf_rewind (rec->wrbuf_marc);
1532                 mt = yaz_marc_create();
1533
1534                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1535                 if (yaz_marc_decode_wrbuf (
1536                         mt, (const char *) r->u.octet_aligned->buf,
1537                         r->u.octet_aligned->len,
1538                         rec->wrbuf_marc) > 0)
1539                 {
1540                     yaz_marc_destroy(mt);
1541                     return record_iconv_return(rec, len,
1542                                                wrbuf_buf(rec->wrbuf_marc),
1543                                                wrbuf_len(rec->wrbuf_marc));
1544                 }
1545                 yaz_marc_destroy(mt);
1546             }
1547             return record_iconv_return(rec, len,
1548                                        (const char *) r->u.octet_aligned->buf,
1549                                        r->u.octet_aligned->len);
1550         }
1551         else if (r->which == Z_External_grs1)
1552         {
1553             if (len) *len = 5;
1554             return "GRS-1";
1555         }
1556         else if (r->which == Z_External_OPAC)
1557         {
1558             if (len) *len = 4;
1559             return "OPAC";
1560         }
1561         return 0;
1562     }
1563     else if (!strcmp (type, "raw"))
1564     {
1565         if (npr->which == Z_NamePlusRecord_databaseRecord)
1566         {
1567             Z_External *r = (Z_External *) npr->u.databaseRecord;
1568
1569             if (r->which == Z_External_sutrs)
1570             {
1571                 if (len) *len = r->u.sutrs->len;
1572                 return (const char *) r->u.sutrs->buf;
1573             }
1574             else if (r->which == Z_External_octet)
1575             {
1576                 if (len) *len = r->u.octet_aligned->len;
1577                 return (const char *) r->u.octet_aligned->buf;
1578             }
1579             else /* grs-1, explain, ... */
1580             {
1581                 if (len) *len = -1;
1582                 return (const char *) npr->u.databaseRecord;
1583             }
1584         }
1585         return 0;
1586     }
1587     else if (!strcmp (type, "ext"))
1588     {
1589         if (npr->which == Z_NamePlusRecord_databaseRecord)
1590             return (const char *) npr->u.databaseRecord;
1591         return 0;
1592     }
1593     return 0;
1594 }
1595
1596 static int strcmp_null(const char *v1, const char *v2)
1597 {
1598     if (!v1 && !v2)
1599         return 0;
1600     if (!v1 || !v2)
1601         return -1;
1602     return strcmp(v1, v2);
1603 }
1604
1605 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1606                               int pos)
1607 {
1608     ZOOM_record_cache rc;
1609     const char *elementSetName =
1610         ZOOM_resultset_option_get (r, "elementSetName");
1611     const char *syntax =
1612         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1613     const char *recordCharset =
1614         ZOOM_resultset_option_get (r, "recordCharset");
1615
1616     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1617     ZOOM_connection_put_event(r->connection, event);
1618
1619     for (rc = r->record_cache; rc; rc = rc->next)
1620     {
1621         if (pos == rc->pos)
1622         {
1623             if (strcmp_null(r->schema, rc->schema))
1624                 continue;
1625             if (strcmp_null(elementSetName,rc->elementSetName))
1626                 continue;
1627             if (strcmp_null(syntax, rc->syntax))
1628                 continue;
1629             if (strcmp_null(recordCharset, rc->rec.record_charset))
1630                 continue;
1631             /* not destroying rc->npr (it's handled by nmem )*/
1632             rc->rec.npr = npr;
1633             /* keeping wrbuf_marc too */
1634             return;
1635         }
1636     }
1637     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1638     rc->rec.npr = npr;
1639     rc->rec.odr = 0;
1640     rc->rec.wrbuf_marc = 0;
1641     rc->rec.wrbuf_iconv = 0;
1642     if (elementSetName)
1643         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1644     else
1645         rc->elementSetName = 0;
1646
1647     if (syntax)
1648         rc->syntax = odr_strdup (r->odr, syntax);
1649     else
1650         rc->syntax = 0;
1651
1652     if (r->schema)
1653         rc->schema = odr_strdup (r->odr, r->schema);
1654     else
1655         rc->schema = 0;
1656
1657     rc->rec.record_charset = 0;
1658     if (recordCharset)
1659         rc->rec.record_charset = odr_strdup(r->odr, recordCharset);
1660
1661     rc->pos = pos;
1662     rc->next = r->record_cache;
1663     r->record_cache = rc;
1664 }
1665
1666 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1667 {
1668     ZOOM_record_cache rc;
1669     const char *elementSetName =
1670         ZOOM_resultset_option_get (r, "elementSetName");
1671     const char *syntax =
1672         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1673
1674     for (rc = r->record_cache; rc; rc = rc->next)
1675     {
1676         if (pos == rc->pos)
1677         {
1678             if (strcmp_null(r->schema, rc->schema))
1679                 continue;
1680             if (strcmp_null(elementSetName,rc->elementSetName))
1681                 continue;
1682             if (strcmp_null(syntax, rc->syntax))
1683                 continue;
1684             return &rc->rec;
1685         }
1686     }
1687     return 0;
1688 }
1689
1690 static void handle_records (ZOOM_connection c, Z_Records *sr,
1691                             int present_phase)
1692 {
1693     ZOOM_resultset resultset;
1694
1695     if (!c->tasks)
1696         return ;
1697     switch (c->tasks->which)
1698     {
1699     case ZOOM_TASK_SEARCH:
1700         resultset = c->tasks->u.search.resultset;
1701         break;
1702     case ZOOM_TASK_RETRIEVE:
1703         resultset = c->tasks->u.retrieve.resultset;
1704         break;
1705     default:
1706         return;
1707     }
1708     if (sr && sr->which == Z_Records_NSD)
1709     {
1710         Z_DiagRec dr, *dr_p = &dr;
1711         dr.which = Z_DiagRec_defaultFormat;
1712         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1713
1714         response_diag (c, dr_p);
1715     }
1716     else if (sr && sr->which == Z_Records_multipleNSD)
1717     {
1718         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1719             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1720         else
1721             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1722     }
1723     else
1724     {
1725         if (resultset->count + resultset->start > resultset->size)
1726             resultset->count = resultset->size - resultset->start;
1727         if (resultset->count < 0)
1728             resultset->count = 0;
1729         if (sr && sr->which == Z_Records_DBOSD)
1730         {
1731             int i;
1732             NMEM nmem = odr_extract_mem (c->odr_in);
1733             Z_NamePlusRecordList *p =
1734                 sr->u.databaseOrSurDiagnostics;
1735             for (i = 0; i<p->num_records; i++)
1736             {
1737                 record_cache_add (resultset, p->records[i],
1738                                   i+ resultset->start);
1739             }
1740             /* transfer our response to search_nmem .. we need it later */
1741             nmem_transfer (resultset->odr->mem, nmem);
1742             nmem_destroy (nmem);
1743             if (present_phase && p->num_records == 0)
1744             {
1745                 /* present response and we didn't get any records! */
1746                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1747             }
1748         }
1749         else if (present_phase)
1750         {
1751             /* present response and we didn't get any records! */
1752             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1753         }
1754     }
1755 }
1756
1757 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1758 {
1759     handle_records (c, pr->records, 1);
1760 }
1761
1762 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1763 {
1764     ZOOM_resultset resultset;
1765     ZOOM_Event event;
1766
1767     yaz_log (LOG_DEBUG, "got search response");
1768
1769     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1770         return ;
1771
1772     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
1773     ZOOM_connection_put_event(c, event);
1774
1775     resultset = c->tasks->u.search.resultset;
1776
1777     resultset->size = *sr->resultCount;
1778     handle_records (c, sr->records, 0);
1779 }
1780
1781 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1782 {
1783     if (res->diagnostics && res->num_diagnostics > 0)
1784         response_diag (c, res->diagnostics[0]);
1785 }
1786
1787 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1788 {
1789     NMEM nmem = odr_extract_mem (c->odr_in);
1790     ZOOM_scanset scan;
1791
1792     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1793         return 0;
1794     scan = c->tasks->u.scan.scan;
1795
1796     if (res->entries && res->entries->nonsurrogateDiagnostics)
1797         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1798     scan->scan_response = res;
1799     nmem_transfer (scan->odr->mem, nmem);
1800     if (res->stepSize)
1801         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1802     if (res->positionOfTerm)
1803         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1804     if (res->scanStatus)
1805         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1806     if (res->numberOfEntriesReturned)
1807         ZOOM_options_set_int (scan->options, "number",
1808                               *res->numberOfEntriesReturned);
1809     nmem_destroy (nmem);
1810     return 1;
1811 }
1812
1813 static zoom_ret send_sort (ZOOM_connection c)
1814 {
1815     ZOOM_resultset  resultset;
1816
1817     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1818         return zoom_complete;
1819
1820     resultset = c->tasks->u.search.resultset;
1821
1822     if (c->error)
1823     {
1824         resultset->r_sort_spec = 0;
1825         return zoom_complete;
1826     }
1827     if (resultset->r_sort_spec)
1828     {
1829         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1830         Z_SortRequest *req = apdu->u.sortRequest;
1831
1832         req->num_inputResultSetNames = 1;
1833         req->inputResultSetNames = (Z_InternationalString **)
1834             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1835         req->inputResultSetNames[0] =
1836             odr_strdup (c->odr_out, resultset->setname);
1837         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1838         req->sortSequence = resultset->r_sort_spec;
1839         resultset->r_sort_spec = 0;
1840         return send_APDU (c, apdu);
1841     }
1842     return zoom_complete;
1843 }
1844
1845 static zoom_ret send_present (ZOOM_connection c)
1846 {
1847     Z_APDU *apdu = 0;
1848     Z_PresentRequest *req = 0;
1849     int i = 0;
1850     const char *syntax = 0;
1851     const char *elementSetName = 0;
1852     ZOOM_resultset  resultset;
1853
1854     if (!c->tasks)
1855         return zoom_complete;
1856
1857     switch (c->tasks->which)
1858     {
1859     case ZOOM_TASK_SEARCH:
1860         resultset = c->tasks->u.search.resultset;
1861         break;
1862     case ZOOM_TASK_RETRIEVE:
1863         resultset = c->tasks->u.retrieve.resultset;
1864         resultset->start = c->tasks->u.retrieve.start;
1865         resultset->count = c->tasks->u.retrieve.count;
1866
1867         if (resultset->start >= resultset->size)
1868             return zoom_complete;
1869         if (resultset->start + resultset->count > resultset->size)
1870             resultset->count = resultset->size - resultset->start;
1871         break;
1872     default:
1873         return zoom_complete;
1874     }
1875
1876     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1877     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1878
1879     if (c->error)                  /* don't continue on error */
1880         return zoom_complete;
1881     if (resultset->start < 0)
1882         return zoom_complete;
1883     for (i = 0; i<resultset->count; i++)
1884     {
1885         ZOOM_record rec =
1886             record_cache_lookup (resultset, i + resultset->start);
1887         if (!rec)
1888             break;
1889     }
1890     if (i == resultset->count)
1891         return zoom_complete;
1892
1893     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1894     req = apdu->u.presentRequest;
1895
1896     resultset->start += i;
1897     resultset->count -= i;
1898     *req->resultSetStartPoint = resultset->start + 1;
1899     *req->numberOfRecordsRequested = resultset->step>0 ?
1900         resultset->step : resultset->count;
1901     assert (*req->numberOfRecordsRequested > 0);
1902
1903     if (syntax && *syntax)
1904         req->preferredRecordSyntax =
1905             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1906
1907     if (resultset->schema && *resultset->schema)
1908     {
1909         Z_RecordComposition *compo = (Z_RecordComposition *)
1910             odr_malloc (c->odr_out, sizeof(*compo));
1911
1912         req->recordComposition = compo;
1913         compo->which = Z_RecordComp_complex;
1914         compo->u.complex = (Z_CompSpec *)
1915             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1916         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1917             odr_malloc(c->odr_out, sizeof(bool_t));
1918         *compo->u.complex->selectAlternativeSyntax = 0;
1919
1920         compo->u.complex->generic = (Z_Specification *)
1921             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1922
1923         compo->u.complex->generic->which = Z_Schema_oid;
1924         compo->u.complex->generic->schema.oid = (Odr_oid *)
1925             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1926
1927         if (!compo->u.complex->generic->schema.oid)
1928         {
1929             /* OID wasn't a schema! Try record syntax instead. */
1930
1931             compo->u.complex->generic->schema.oid = (Odr_oid *)
1932                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1933         }
1934         if (elementSetName && *elementSetName)
1935         {
1936             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1937                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1938             compo->u.complex->generic->elementSpec->which =
1939                 Z_ElementSpec_elementSetName;
1940             compo->u.complex->generic->elementSpec->u.elementSetName =
1941                 odr_strdup (c->odr_out, elementSetName);
1942         }
1943         else
1944             compo->u.complex->generic->elementSpec = 0;
1945         compo->u.complex->num_dbSpecific = 0;
1946         compo->u.complex->dbSpecific = 0;
1947         compo->u.complex->num_recordSyntax = 0;
1948         compo->u.complex->recordSyntax = 0;
1949     }
1950     else if (elementSetName && *elementSetName)
1951     {
1952         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1953             odr_malloc (c->odr_out, sizeof(*esn));
1954         Z_RecordComposition *compo = (Z_RecordComposition *)
1955             odr_malloc (c->odr_out, sizeof(*compo));
1956
1957         esn->which = Z_ElementSetNames_generic;
1958         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1959         compo->which = Z_RecordComp_simple;
1960         compo->u.simple = esn;
1961         req->recordComposition = compo;
1962     }
1963     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1964     return send_APDU (c, apdu);
1965 }
1966
1967 ZOOM_API(ZOOM_scanset)
1968 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1969 {
1970     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1971
1972     scan->connection = c;
1973     scan->odr = odr_createmem (ODR_DECODE);
1974     scan->options = ZOOM_options_create_with_parent (c->options);
1975     scan->refcount = 1;
1976     scan->scan_response = 0;
1977
1978     if ((scan->termListAndStartPoint =
1979          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1980                       start)))
1981     {
1982         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1983         task->u.scan.scan = scan;
1984
1985         (scan->refcount)++;
1986         if (!c->async)
1987         {
1988             while (ZOOM_event (1, &c))
1989                 ;
1990         }
1991     }
1992     return scan;
1993 }
1994
1995 ZOOM_API(void)
1996 ZOOM_scanset_destroy (ZOOM_scanset scan)
1997 {
1998     if (!scan)
1999         return;
2000     (scan->refcount)--;
2001     if (scan->refcount == 0)
2002     {
2003         odr_destroy (scan->odr);
2004
2005         ZOOM_options_destroy (scan->options);
2006         xfree (scan);
2007     }
2008 }
2009
2010 static zoom_ret send_package (ZOOM_connection c)
2011 {
2012     ZOOM_Event event;
2013     if (!c->tasks)
2014         return zoom_complete;
2015     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2016
2017     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
2018     ZOOM_connection_put_event (c, event);
2019
2020     return do_write_ex (c, c->tasks->u.package->buf_out,
2021                         c->tasks->u.package->len_out);
2022 }
2023
2024 static zoom_ret send_scan (ZOOM_connection c)
2025 {
2026     ZOOM_scanset scan;
2027     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2028     Z_ScanRequest *req = apdu->u.scanRequest;
2029     if (!c->tasks)
2030         return zoom_complete;
2031     assert (c->tasks->which == ZOOM_TASK_SCAN);
2032     scan = c->tasks->u.scan.scan;
2033
2034     req->termListAndStartPoint = scan->termListAndStartPoint;
2035     req->attributeSet = scan->attributeSet;
2036
2037     *req->numberOfTermsRequested =
2038         ZOOM_options_get_int(scan->options, "number", 10);
2039
2040     req->preferredPositionInResponse =
2041         odr_intdup (c->odr_out,
2042                     ZOOM_options_get_int(scan->options, "position", 1));
2043
2044     req->stepSize =
2045         odr_intdup (c->odr_out,
2046                     ZOOM_options_get_int(scan->options, "stepSize", 0));
2047
2048     req->databaseNames = set_DatabaseNames (c, scan->options,
2049                                             &req->num_databaseNames);
2050
2051     return send_APDU (c, apdu);
2052 }
2053
2054 ZOOM_API(size_t)
2055 ZOOM_scanset_size (ZOOM_scanset scan)
2056 {
2057     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2058         return 0;
2059     return scan->scan_response->entries->num_entries;
2060 }
2061
2062 ZOOM_API(const char *)
2063 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
2064                                int *occ, int *len)
2065 {
2066     const char *term = 0;
2067     size_t noent = ZOOM_scanset_size (scan);
2068     Z_ScanResponse *res = scan->scan_response;
2069
2070     *len = 0;
2071     *occ = 0;
2072     if (pos >= noent)
2073         return 0;
2074     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2075     {
2076         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2077
2078         if (t->term->which == Z_Term_general)
2079         {
2080             term = (const char *) t->term->u.general->buf;
2081             *len = t->term->u.general->len;
2082         }
2083         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2084     }
2085     return term;
2086 }
2087
2088 ZOOM_API(const char *)
2089 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2090 {
2091     return ZOOM_options_get (scan->options, key);
2092 }
2093
2094 ZOOM_API(void)
2095 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2096                               const char *val)
2097 {
2098     ZOOM_options_set (scan->options, key, val);
2099 }
2100
2101 static Z_APDU *create_es_package (ZOOM_package p, int type)
2102 {
2103     const char *str;
2104     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2105     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2106
2107     *req->function = Z_ExtendedServicesRequest_create;
2108
2109     str = ZOOM_options_get(p->options, "package-name");
2110     if (str && *str)
2111         req->packageName = nmem_strdup (p->odr_out->mem, str);
2112
2113     str = ZOOM_options_get(p->options, "user-id");
2114     if (str)
2115         req->userId = nmem_strdup (p->odr_out->mem, str);
2116
2117     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2118                                               type);
2119
2120     str = ZOOM_options_get(p->options, "function");
2121     if (str)
2122     {
2123         if (!strcmp (str, "create"))
2124             *req->function = 1;
2125         if (!strcmp (str, "delete"))
2126             *req->function = 2;
2127         if (!strcmp (str, "modify"))
2128             *req->function = 3;
2129     }
2130     return apdu;
2131 }
2132
2133 static const char *ill_array_lookup (void *clientData, const char *idx)
2134 {
2135     ZOOM_package p = (ZOOM_package) clientData;
2136     return ZOOM_options_get (p->options, idx+4);
2137 }
2138
2139 static Z_External *encode_ill_request (ZOOM_package p)
2140 {
2141     ODR out = p->odr_out;
2142     ILL_Request *req;
2143     Z_External *r = 0;
2144     struct ill_get_ctl ctl;
2145
2146     ctl.odr = p->odr_out;
2147     ctl.clientData = p;
2148     ctl.f = ill_array_lookup;
2149
2150     req = ill_get_ILLRequest(&ctl, "ill", 0);
2151
2152     if (!ill_Request (out, &req, 0, 0))
2153     {
2154         int ill_request_size;
2155         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2156         if (ill_request_buf)
2157             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2158         return 0;
2159     }
2160     else
2161     {
2162         oident oid;
2163         int illRequest_size = 0;
2164         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2165
2166         oid.proto = PROTO_GENERAL;
2167         oid.oclass = CLASS_GENERAL;
2168         oid.value = VAL_ISO_ILL_1;
2169
2170         r = (Z_External *) odr_malloc (out, sizeof(*r));
2171         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2172         r->indirect_reference = 0;
2173         r->descriptor = 0;
2174         r->which = Z_External_single;
2175
2176         r->u.single_ASN1_type = (Odr_oct *)
2177             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2178         r->u.single_ASN1_type->buf = (unsigned char*)
2179             odr_malloc (out, illRequest_size);
2180         r->u.single_ASN1_type->len = illRequest_size;
2181         r->u.single_ASN1_type->size = illRequest_size;
2182         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2183     }
2184     return r;
2185 }
2186
2187 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2188 {
2189     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2190     const char *str;
2191
2192     req->which=Z_IOItemOrder_esRequest;
2193     req->u.esRequest = (Z_IORequest *)
2194         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2195
2196     /* to keep part ... */
2197     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2198         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2199     req->u.esRequest->toKeep->supplDescription = 0;
2200     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2201         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2202
2203     str = ZOOM_options_get(p->options, "contact-name");
2204     req->u.esRequest->toKeep->contact->name = str ?
2205         nmem_strdup (p->odr_out->mem, str) : 0;
2206
2207     str = ZOOM_options_get(p->options, "contact-phone");
2208     req->u.esRequest->toKeep->contact->phone = str ?
2209         nmem_strdup (p->odr_out->mem, str) : 0;
2210
2211     str = ZOOM_options_get(p->options, "contact-email");
2212     req->u.esRequest->toKeep->contact->email = str ?
2213         nmem_strdup (p->odr_out->mem, str) : 0;
2214
2215     req->u.esRequest->toKeep->addlBilling = 0;
2216
2217     /* not to keep part ... */
2218     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2219         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2220
2221     str = ZOOM_options_get(p->options, "itemorder-setname");
2222     if (!str)
2223         str = "default";
2224
2225     if (!*str)
2226         req->u.esRequest->notToKeep->resultSetItem = 0;
2227     else
2228     {
2229         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2230            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2231
2232         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2233            nmem_strdup (p->odr_out->mem, str);
2234         req->u.esRequest->notToKeep->resultSetItem->item =
2235             (int *) odr_malloc(p->odr_out, sizeof(int));
2236
2237         str = ZOOM_options_get(p->options, "itemorder-item");
2238         *req->u.esRequest->notToKeep->resultSetItem->item =
2239             (str ? atoi(str) : 1);
2240     }
2241     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2242
2243     return req;
2244 }
2245
2246 ZOOM_API(void)
2247     ZOOM_package_send (ZOOM_package p, const char *type)
2248 {
2249     Z_APDU *apdu = 0;
2250     ZOOM_connection c;
2251     if (!p)
2252         return;
2253     c = p->connection;
2254     odr_reset (p->odr_out);
2255     xfree (p->buf_out);
2256     p->buf_out = 0;
2257     if (!strcmp(type, "itemorder"))
2258     {
2259         Z_External *r;
2260         apdu = create_es_package (p, VAL_ITEMORDER);
2261         if (apdu)
2262         {
2263             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2264
2265             r->direct_reference =
2266                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2267                                        VAL_ITEMORDER);
2268             r->descriptor = 0;
2269             r->which = Z_External_itemOrder;
2270             r->indirect_reference = 0;
2271             r->u.itemOrder = encode_item_order (p);
2272
2273             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2274         }
2275     }
2276     if (apdu)
2277     {
2278         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2279         {
2280             char *buf;
2281
2282             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2283             task->u.package = p;
2284             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2285             p->buf_out = (char *) xmalloc (p->len_out);
2286             memcpy (p->buf_out, buf, p->len_out);
2287
2288             (p->refcount)++;
2289             if (!c->async)
2290             {
2291                 while (ZOOM_event (1, &c))
2292                     ;
2293             }
2294         }
2295     }
2296 }
2297
2298 ZOOM_API(ZOOM_package)
2299     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2300 {
2301     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2302
2303     p->connection = c;
2304     p->odr_out = odr_createmem (ODR_ENCODE);
2305     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2306     p->refcount = 1;
2307     p->buf_out = 0;
2308     p->len_out = 0;
2309     return p;
2310 }
2311
2312 ZOOM_API(void)
2313     ZOOM_package_destroy(ZOOM_package p)
2314 {
2315     if (!p)
2316         return;
2317     (p->refcount)--;
2318     if (p->refcount == 0)
2319     {
2320         odr_destroy (p->odr_out);
2321         xfree (p->buf_out);
2322
2323         ZOOM_options_destroy (p->options);
2324         xfree (p);
2325     }
2326 }
2327
2328 ZOOM_API(const char *)
2329 ZOOM_package_option_get (ZOOM_package p, const char *key)
2330 {
2331     return ZOOM_options_get (p->options, key);
2332 }
2333
2334
2335 ZOOM_API(void)
2336 ZOOM_package_option_set (ZOOM_package p, const char *key,
2337                               const char *val)
2338 {
2339     ZOOM_options_set (p->options, key, val);
2340 }
2341
2342 static int ZOOM_connection_exec_task (ZOOM_connection c)
2343 {
2344     ZOOM_task task = c->tasks;
2345     zoom_ret ret = zoom_complete;
2346
2347     if (!task)
2348     {
2349         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2350         return 0;
2351     }
2352     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2353              task->which, task->running);
2354     if (c->error != ZOOM_ERROR_NONE)
2355     {
2356         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2357         ZOOM_connection_remove_tasks (c);
2358         return 0;
2359     }
2360     if (task->running)
2361     {
2362         yaz_log (LOG_DEBUG, "task already running");
2363         return 0;
2364     }
2365     task->running = 1;
2366     ret = zoom_complete;
2367     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2368     {
2369         switch (task->which)
2370         {
2371         case ZOOM_TASK_SEARCH:
2372             if (c->proto == PROTO_HTTP)
2373                 ret = ZOOM_connection_srw_send_search(c);
2374             else
2375                 ret = ZOOM_connection_send_search(c);
2376             break;
2377         case ZOOM_TASK_RETRIEVE:
2378             if (c->proto == PROTO_HTTP)
2379                 ret = ZOOM_connection_srw_send_search(c);
2380             else
2381                 ret = send_present (c);
2382             break;
2383         case ZOOM_TASK_CONNECT:
2384             ret = do_connect(c);
2385             break;
2386         case ZOOM_TASK_SCAN:
2387             ret = send_scan(c);
2388             break;
2389         case ZOOM_TASK_PACKAGE:
2390             ret = send_package(c);
2391             break;
2392         }
2393     }
2394     else
2395     {
2396         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2397         ZOOM_connection_remove_tasks (c);
2398     }
2399     if (ret == zoom_complete)
2400     {
2401         yaz_log (LOG_DEBUG, "task removed (complete)");
2402         ZOOM_connection_remove_task (c);
2403         return 0;
2404     }
2405     yaz_log (LOG_DEBUG, "task pending");
2406     return 1;
2407 }
2408
2409 static zoom_ret send_sort_present (ZOOM_connection c)
2410 {
2411     zoom_ret r = send_sort (c);
2412     if (r == zoom_complete)
2413         r = send_present (c);
2414     return r;
2415 }
2416
2417 static int es_response (ZOOM_connection c,
2418                         Z_ExtendedServicesResponse *res)
2419 {
2420     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2421         return 0;
2422     if (res->diagnostics && res->num_diagnostics > 0)
2423         response_diag(c, res->diagnostics[0]);
2424     if (res->taskPackage &&
2425         res->taskPackage->which == Z_External_extendedService)
2426     {
2427         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2428         Odr_oct *id = taskPackage->targetReference;
2429
2430         if (id)
2431             ZOOM_options_setl (c->tasks->u.package->options,
2432                                "targetReference", (char*) id->buf, id->len);
2433     }
2434     return 1;
2435 }
2436
2437
2438 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2439 {
2440     Z_InitResponse *initrs;
2441
2442     c->mask = 0;
2443     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2444     switch(apdu->which)
2445     {
2446     case Z_APDU_initResponse:
2447         initrs = apdu->u.initResponse;
2448         ZOOM_connection_option_set(c, "targetImplementationId",
2449                                    initrs->implementationId ?
2450                                    initrs->implementationId : "");
2451         ZOOM_connection_option_set(c, "targetImplementationName",
2452                                    initrs->implementationName ?
2453                                    initrs->implementationName : "");
2454         ZOOM_connection_option_set(c, "targetImplementationVersion",
2455                                    initrs->implementationVersion ?
2456                                    initrs->implementationVersion : "");
2457         if (!*initrs->result)
2458         {
2459             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2460         }
2461         else
2462         {
2463             char *cookie =
2464                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2465                                           VAL_COOKIE, 1, 0);
2466             xfree (c->cookie_in);
2467             c->cookie_in = 0;
2468             if (cookie)
2469                 c->cookie_in = xstrdup(cookie);
2470             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2471                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2472                 c->support_named_resultsets = 1;
2473             if (c->tasks)
2474             {
2475                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2476                 ZOOM_connection_remove_task (c);
2477             }
2478             ZOOM_connection_exec_task (c);
2479         }
2480         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2481         {
2482             NMEM tmpmem = nmem_create();
2483             Z_CharSetandLanguageNegotiation *p =
2484                 yaz_get_charneg_record(initrs->otherInfo);
2485
2486             if (p)
2487             {
2488                 char *charset=NULL, *lang=NULL;
2489                 int sel;
2490
2491                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2492                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2493                         "language %s, select %d",
2494                         charset ? charset : "none", lang ? lang : "none", sel);
2495                 if (charset)
2496                     ZOOM_connection_option_set (c, "negotiation-charset",
2497                                                 charset);
2498                 if (lang)
2499                     ZOOM_connection_option_set (c, "negotiation-lang",
2500                                                 lang);
2501                 nmem_destroy(tmpmem);
2502             }
2503         }
2504         break;
2505     case Z_APDU_searchResponse:
2506         handle_search_response (c, apdu->u.searchResponse);
2507         if (send_sort_present (c) == zoom_complete)
2508             ZOOM_connection_remove_task (c);
2509         break;
2510     case Z_APDU_presentResponse:
2511         handle_present_response (c, apdu->u.presentResponse);
2512         if (send_present (c) == zoom_complete)
2513             ZOOM_connection_remove_task (c);
2514         break;
2515     case Z_APDU_sortResponse:
2516         sort_response (c, apdu->u.sortResponse);
2517         if (send_present (c) == zoom_complete)
2518             ZOOM_connection_remove_task (c);
2519         break;
2520     case Z_APDU_scanResponse:
2521         scan_response (c, apdu->u.scanResponse);
2522         ZOOM_connection_remove_task (c);
2523         break;
2524     case Z_APDU_extendedServicesResponse:
2525         es_response (c, apdu->u.extendedServicesResponse);
2526         ZOOM_connection_remove_task (c);
2527         break;
2528     case Z_APDU_close:
2529         if (c->reconnect_ok)
2530         {
2531             do_close(c);
2532             c->tasks->running = 0;
2533             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2534         }
2535         else
2536         {
2537             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2538             do_close(c);
2539         }
2540         break;
2541     default:
2542         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2543         do_close(c);
2544     }
2545 }
2546
2547 #if HAVE_XML2
2548 static void handle_srw_response(ZOOM_connection c,
2549                                 Z_SRW_searchRetrieveResponse *res)
2550 {
2551     ZOOM_resultset resultset = 0;
2552     int i;
2553     NMEM nmem;
2554     ZOOM_Event event;
2555
2556     if (!c->tasks)
2557         return;
2558
2559     if (c->tasks->which == ZOOM_TASK_SEARCH)
2560         resultset = c->tasks->u.search.resultset;
2561     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2562         resultset = c->tasks->u.retrieve.resultset;
2563     else
2564         return ;
2565
2566     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2567     ZOOM_connection_put_event(c, event);
2568
2569     resultset->size = 0;
2570
2571     yaz_log(LOG_DEBUG, "got SRW response OK");
2572
2573     if (res->numberOfRecords)
2574         resultset->size = *res->numberOfRecords;
2575
2576     for (i = 0; i<res->num_records; i++)
2577     {
2578         int pos;
2579
2580         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2581             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2582
2583         if (res->records[i].recordPosition &&
2584             *res->records[i].recordPosition > 0)
2585             pos = *res->records[i].recordPosition - 1;
2586         else
2587             pos = resultset->start + i;
2588
2589         npr->databaseName = 0;
2590         npr->which = Z_NamePlusRecord_databaseRecord;
2591         npr->u.databaseRecord = (Z_External *)
2592             odr_malloc(c->odr_in, sizeof(Z_External));
2593         npr->u.databaseRecord->descriptor = 0;
2594         npr->u.databaseRecord->direct_reference =
2595             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2596         npr->u.databaseRecord->which = Z_External_octet;
2597         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2598             odr_malloc(c->odr_in, sizeof(Odr_oct));
2599         npr->u.databaseRecord->u.octet_aligned->buf =
2600             res->records[i].recordData_buf;
2601         npr->u.databaseRecord->u.octet_aligned->len =
2602             npr->u.databaseRecord->u.octet_aligned->size =
2603             res->records[i].recordData_len;
2604         record_cache_add (resultset, npr, pos);
2605     }
2606     if (res->num_diagnostics > 0)
2607     {
2608         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2609                        res->diagnostics[0].details, 0);
2610     }
2611     nmem = odr_extract_mem(c->odr_in);
2612     nmem_transfer(resultset->odr->mem, nmem);
2613     nmem_destroy(nmem);
2614 }
2615 #endif
2616
2617 #if HAVE_XML2
2618 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2619 {
2620     int ret = -1;
2621     const char *content_type = z_HTTP_header_lookup(hres->headers,
2622                                                     "Content-Type");
2623     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2624                                                        "Connection");
2625     c->mask = 0;
2626     yaz_log (LOG_DEBUG, "handle_http");
2627
2628     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2629     {
2630         Z_SOAP *soap_package = 0;
2631         ODR o = odr_createmem(ODR_DECODE);
2632         Z_SOAP_Handler soap_handlers[2] = {
2633             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2634              (Z_SOAP_fun) yaz_srw_codec},
2635             {0, 0, 0}
2636         };
2637         ret = z_soap_codec(o, &soap_package,
2638                            &hres->content_buf, &hres->content_len,
2639                            soap_handlers);
2640         if (!ret && soap_package->which == Z_SOAP_generic &&
2641             soap_package->u.generic->no == 0)
2642         {
2643             Z_SRW_PDU *sr = soap_package->u.generic->p;
2644             if (sr->which == Z_SRW_searchRetrieve_response)
2645                 handle_srw_response(c, sr->u.response);
2646             else
2647                 ret = -1;
2648         }
2649         else if (!ret && (soap_package->which == Z_SOAP_fault
2650                           || soap_package->which == Z_SOAP_error))
2651         {
2652             set_HTTP_error(c, hres->code,
2653                            soap_package->u.fault->fault_code,
2654                            soap_package->u.fault->fault_string);
2655         }
2656         else
2657             ret = -1;
2658         odr_destroy(o);
2659     }
2660     if (ret)
2661     {
2662         if (hres->code != 200)
2663             set_HTTP_error(c, hres->code, 0, 0);
2664         else
2665             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2666         do_close (c);
2667     }
2668     ZOOM_connection_remove_task(c);
2669     if (!strcmp(hres->version, "1.0"))
2670     {
2671         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2672         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2673             do_close(c);
2674     }
2675     else
2676     {
2677         /* HTTP 1.1: only if no close we stay alive .. */
2678         if (connection_head && !strcmp(connection_head, "close"))
2679             do_close(c);
2680     }
2681 }
2682 #endif
2683
2684 static int do_read (ZOOM_connection c)
2685 {
2686     int r;
2687     ZOOM_Event event;
2688
2689     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2690     ZOOM_connection_put_event (c, event);
2691
2692     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2693
2694     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2695     if (r == 1)
2696         return 0;
2697     if (r <= 0)
2698     {
2699         if (c->reconnect_ok)
2700         {
2701             do_close (c);
2702             c->reconnect_ok = 0;
2703             yaz_log (LOG_DEBUG, "reconnect read");
2704             c->tasks->running = 0;
2705             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2706         }
2707         else
2708         {
2709             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2710             do_close (c);
2711         }
2712     }
2713     else
2714     {
2715         Z_GDU *gdu;
2716         ZOOM_Event event;
2717
2718         odr_reset (c->odr_in);
2719         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2720         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2721         ZOOM_connection_put_event (c, event);
2722
2723         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2724         {
2725             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2726             do_close (c);
2727         }
2728         else if (gdu->which == Z_GDU_Z3950)
2729             handle_apdu (c, gdu->u.z3950);
2730         else if (gdu->which == Z_GDU_HTTP_Response)
2731         {
2732 #if HAVE_XML2
2733             handle_http (c, gdu->u.HTTP_Response);
2734 #else
2735             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2736             do_close (c);
2737 #endif
2738         }
2739         c->reconnect_ok = 0;
2740     }
2741     return 1;
2742 }
2743
2744 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2745 {
2746     int r;
2747     ZOOM_Event event;
2748
2749     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2750     ZOOM_connection_put_event (c, event);
2751
2752     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2753     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2754     {
2755         if (c->reconnect_ok)
2756         {
2757             do_close (c);
2758             c->reconnect_ok = 0;
2759             yaz_log (LOG_DEBUG, "reconnect write");
2760             c->tasks->running = 0;
2761             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2762             return zoom_pending;
2763         }
2764         if (c->state == STATE_CONNECTING)
2765             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2766         else
2767             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2768         do_close (c);
2769         return zoom_complete;
2770     }
2771     else if (r == 1)
2772     {
2773         c->mask = ZOOM_SELECT_EXCEPT;
2774         if (c->cs->io_pending & CS_WANT_WRITE)
2775             c->mask += ZOOM_SELECT_WRITE;
2776         if (c->cs->io_pending & CS_WANT_READ)
2777             c->mask += ZOOM_SELECT_READ;
2778         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2779     }
2780     else
2781     {
2782         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2783         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2784     }
2785     return zoom_pending;
2786 }
2787
2788 static zoom_ret do_write(ZOOM_connection c)
2789 {
2790     return do_write_ex (c, c->buf_out, c->len_out);
2791 }
2792
2793
2794 ZOOM_API(const char *)
2795 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2796 {
2797     return ZOOM_options_get (c->options, key);
2798 }
2799
2800 ZOOM_API(void)
2801 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2802                                   const char *val)
2803 {
2804     ZOOM_options_set (c->options, key, val);
2805 }
2806
2807 ZOOM_API(const char *)
2808 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2809 {
2810     return ZOOM_options_get (r->options, key);
2811 }
2812
2813 ZOOM_API(void)
2814 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2815                                   const char *val)
2816 {
2817     ZOOM_options_set (r->options, key, val);
2818 }
2819
2820
2821 ZOOM_API(int)
2822 ZOOM_connection_errcode (ZOOM_connection c)
2823 {
2824     return ZOOM_connection_error (c, 0, 0);
2825 }
2826
2827 ZOOM_API(const char *)
2828 ZOOM_connection_errmsg (ZOOM_connection c)
2829 {
2830     const char *msg;
2831     ZOOM_connection_error (c, &msg, 0);
2832     return msg;
2833 }
2834
2835 ZOOM_API(const char *)
2836 ZOOM_connection_addinfo (ZOOM_connection c)
2837 {
2838     const char *addinfo;
2839     ZOOM_connection_error (c, 0, &addinfo);
2840     return addinfo;
2841 }
2842
2843 ZOOM_API(const char *)
2844 ZOOM_diag_str (int error)
2845 {
2846     switch (error)
2847     {
2848     case ZOOM_ERROR_NONE:
2849         return "No error";
2850     case ZOOM_ERROR_CONNECT:
2851         return "Connect failed";
2852     case ZOOM_ERROR_MEMORY:
2853         return "Out of memory";
2854     case ZOOM_ERROR_ENCODE:
2855         return "Encoding failed";
2856     case ZOOM_ERROR_DECODE:
2857         return "Decoding failed";
2858     case ZOOM_ERROR_CONNECTION_LOST:
2859         return "Connection lost";
2860     case ZOOM_ERROR_INIT:
2861         return "Init rejected";
2862     case ZOOM_ERROR_INTERNAL:
2863         return "Internal failure";
2864     case ZOOM_ERROR_TIMEOUT:
2865         return "Timeout";
2866     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2867         return "Unsupported protocol";
2868     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2869         return "Unsupported query type";
2870     default:
2871         return diagbib1_str (error);
2872     }
2873 }
2874
2875 ZOOM_API(int)
2876 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2877                          const char **addinfo, const char **diagset)
2878 {
2879     int error = c->error;
2880     if (cp)
2881     {
2882         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2883             *cp = ZOOM_diag_str(error);
2884         else if (!strcmp(c->diagset, "HTTP"))
2885             *cp = z_HTTP_errmsg(c->error);
2886         else if (!strcmp(c->diagset, "Bib-1"))
2887             *cp = ZOOM_diag_str(error);
2888         else if (!strcmp(c->diagset, "SRW"))
2889             *cp = yaz_diag_srw_str(c->error);
2890         else
2891             *cp = "Unknown error and diagnostic set";
2892     }
2893     if (addinfo)
2894         *addinfo = c->addinfo ? c->addinfo : "";
2895     if (diagset)
2896         *diagset = c->diagset ? c->diagset : "";
2897     return c->error;
2898 }
2899
2900 ZOOM_API(int)
2901 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2902                        const char **addinfo)
2903 {
2904     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2905 }
2906
2907 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2908 {
2909     ZOOM_Event event = 0;
2910     int r = cs_look(c->cs);
2911     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2912              c, mask, r);
2913
2914     if (r == CS_NONE)
2915     {
2916         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2917         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2918         do_close (c);
2919         ZOOM_connection_put_event (c, event);
2920     }
2921     else if (r == CS_CONNECT)
2922     {
2923         int ret;
2924         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2925
2926         ret = cs_rcvconnect (c->cs);
2927         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2928         if (ret == 1)
2929         {
2930             c->mask = ZOOM_SELECT_EXCEPT;
2931             if (c->cs->io_pending & CS_WANT_WRITE)
2932                 c->mask += ZOOM_SELECT_WRITE;
2933             if (c->cs->io_pending & CS_WANT_READ)
2934                 c->mask += ZOOM_SELECT_READ;
2935             ZOOM_connection_put_event (c, event);
2936         }
2937         else if (ret == 0)
2938         {
2939             ZOOM_connection_put_event (c, event);
2940             if (c->proto == PROTO_Z3950)
2941                 ZOOM_connection_send_init(c);
2942             else
2943             {
2944                 /* no init request for SRW .. */
2945                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2946                 ZOOM_connection_remove_task (c);
2947                 c->mask = 0;
2948                 ZOOM_connection_exec_task (c);
2949             }
2950             c->state = STATE_ESTABLISHED;
2951         }
2952         else
2953         {
2954             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2955             do_close (c);
2956             ZOOM_connection_put_event (c, event);
2957         }
2958     }
2959     else
2960     {
2961         if (mask & ZOOM_SELECT_READ)
2962             do_read (c);
2963         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2964             do_write (c);
2965     }
2966     return 1;
2967 }
2968
2969 ZOOM_API(int)
2970 ZOOM_connection_last_event(ZOOM_connection cs)
2971 {
2972     if (!cs)
2973         return ZOOM_EVENT_NONE;
2974     return cs->last_event;
2975 }
2976
2977 ZOOM_API(int)
2978 ZOOM_event (int no, ZOOM_connection *cs)
2979 {
2980     int timeout = 5000;
2981 #if HAVE_SYS_POLL_H
2982     struct pollfd pollfds[1024];
2983     ZOOM_connection poll_cs[1024];
2984 #else
2985     struct timeval tv;
2986     fd_set input, output, except;
2987 #endif
2988     int i, r, nfds;
2989     int max_fd = 0;
2990
2991     for (i = 0; i<no; i++)
2992     {
2993         ZOOM_connection c = cs[i];
2994         ZOOM_Event event;
2995         if (c && (event = ZOOM_connection_get_event(c)))
2996         {
2997             ZOOM_Event_destroy (event);
2998             return i+1;
2999         }
3000     }
3001     for (i = 0; i<no; i++)
3002     {
3003         ZOOM_connection c = cs[i];
3004         ZOOM_Event event;
3005         if (c && ZOOM_connection_exec_task (c))
3006         {
3007             if ((event = ZOOM_connection_get_event(c)))
3008             {
3009                 ZOOM_Event_destroy (event);
3010                 return i+1;
3011             }
3012         }
3013     }
3014 #if HAVE_SYS_POLL_H
3015
3016 #else
3017     FD_ZERO (&input);
3018     FD_ZERO (&output);
3019     FD_ZERO (&except);
3020 #endif
3021     nfds = 0;
3022     for (i = 0; i<no; i++)
3023     {
3024         ZOOM_connection c = cs[i];
3025         int fd, mask;
3026         int this_timeout;
3027
3028         if (!c)
3029             continue;
3030         fd = z3950_connection_socket(c);
3031         mask = z3950_connection_mask(c);
3032
3033         if (fd == -1)
3034             continue;
3035         if (max_fd < fd)
3036             max_fd = fd;
3037
3038         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
3039         if (this_timeout != -1 && this_timeout < timeout)
3040             timeout = this_timeout;
3041 #if HAVE_SYS_POLL_H
3042         if (mask)
3043         {
3044             short poll_events = 0;
3045
3046             if (mask & ZOOM_SELECT_READ)
3047                 poll_events += POLLIN;
3048             if (mask & ZOOM_SELECT_WRITE)
3049                 poll_events += POLLOUT;
3050             if (mask & ZOOM_SELECT_EXCEPT)
3051                 poll_events += POLLERR;
3052             pollfds[nfds].fd = fd;
3053             pollfds[nfds].events = poll_events;
3054             pollfds[nfds].revents = 0;
3055             poll_cs[nfds] = c;
3056             nfds++;
3057         }
3058 #else
3059         if (mask & ZOOM_SELECT_READ)
3060         {
3061             FD_SET (fd, &input);
3062             nfds++;
3063         }
3064         if (mask & ZOOM_SELECT_WRITE)
3065         {
3066             FD_SET (fd, &output);
3067             nfds++;
3068         }
3069         if (mask & ZOOM_SELECT_EXCEPT)
3070         {
3071             FD_SET (fd, &except);
3072             nfds++;
3073         }
3074 #endif
3075     }
3076     if (timeout >= 5000)
3077         timeout = 30;
3078
3079     if (!nfds)
3080         return 0;
3081
3082 #if HAVE_SYS_POLL_H
3083     r = poll (pollfds, nfds, timeout * 1000);
3084     for (i = 0; i<nfds; i++)
3085     {
3086         ZOOM_connection c = poll_cs[i];
3087         if (r && c->mask)
3088         {
3089             int mask = 0;
3090             if (pollfds[i].revents & POLLIN)
3091                 mask += ZOOM_SELECT_READ;
3092             if (pollfds[i].revents & POLLOUT)
3093                 mask += ZOOM_SELECT_WRITE;
3094             if (pollfds[i].revents & POLLERR)
3095                 mask += ZOOM_SELECT_EXCEPT;
3096             if (mask)
3097                 ZOOM_connection_do_io(c, mask);
3098         }
3099         else if (r == 0 && c->mask)
3100         {
3101             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3102             /* timeout and this connection was waiting */
3103             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3104             do_close (c);
3105             ZOOM_connection_put_event(c, event);
3106         }
3107     }
3108 #else
3109     tv.tv_sec = timeout;
3110     tv.tv_usec = 0;
3111     yaz_log (LOG_DEBUG, "select start");
3112     r = select (max_fd+1, &input, &output, &except, &tv);
3113     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3114     for (i = 0; i<no; i++)
3115     {
3116         ZOOM_connection c = cs[i];
3117         int fd, mask;
3118
3119         if (!c)
3120             continue;
3121         fd = z3950_connection_socket(c);
3122         mask = 0;
3123         if (r && c->mask)
3124         {
3125             /* no timeout and real socket */
3126             if (FD_ISSET(fd, &input))
3127                 mask += ZOOM_SELECT_READ;
3128             if (FD_ISSET(fd, &output))
3129                 mask += ZOOM_SELECT_WRITE;
3130             if (FD_ISSET(fd, &except))
3131                 mask += ZOOM_SELECT_EXCEPT;
3132             if (mask)
3133                 ZOOM_connection_do_io(c, mask);
3134         }
3135         if (r == 0 && c->mask)
3136         {
3137             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3138             /* timeout and this connection was waiting */
3139             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3140             do_close (c);
3141             yaz_log (LOG_DEBUG, "timeout");
3142             ZOOM_connection_put_event(c, event);
3143         }
3144     }
3145 #endif
3146     for (i = 0; i<no; i++)
3147     {
3148         ZOOM_connection c = cs[i];
3149         ZOOM_Event event;
3150         if (c && (event = ZOOM_connection_get_event(c)))
3151         {
3152             ZOOM_Event_destroy (event);
3153             return i+1;
3154         }
3155     }
3156     return 0;
3157 }