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 1.25 2003-02-19 15:22:11 adam Exp $
   6  *
   7  * ZOOM layer for C, connections, result sets, queries.
   8  */
   9 #include <assert.h>
  10 #include <string.h>
  11 #include "zoom-p.h"
  12
  13 #include <yaz/yaz-util.h>
  14 #include <yaz/xmalloc.h>
  15 #include <yaz/otherinfo.h>
  16 #include <yaz/log.h>
  17 #include <yaz/pquery.h>
  18 #include <yaz/marcdisp.h>
  19 #include <yaz/diagbib1.h>
  20 #include <yaz/charneg.h>
  21 #include <yaz/ill.h>
  22 #include <yaz/srw.h>
  23
  24 #if HAVE_SYS_POLL_H
  25 #include <sys/poll.h>
  26 #endif
  27
  28 typedef enum {
  29     zoom_pending,
  30     zoom_complete
  31 } zoom_ret;
  32
  33 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  34 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  35
  36 static ZOOM_Event ZOOM_Event_create (int kind)
  37 {
  38     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  39     event->kind = kind;
  40     event->next = 0;
  41     event->prev = 0;
  42     return event;
  43 }
  44
  45 static void ZOOM_Event_destroy (ZOOM_Event event)
  46 {
  47     xfree (event);
  48 }
  49
  50 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  51 {
  52     if (c->m_queue_back)
  53     {
  54         c->m_queue_back->prev = event;
  55         assert (c->m_queue_front);
  56     }
  57     else
  58     {
  59         assert (!c->m_queue_front);
  60         c->m_queue_front = event;
  61     }
  62     event->next = c->m_queue_back;
  63     event->prev = 0;
  64     c->m_queue_back = event;
  65 }
  66
  67 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  68 {
  69     ZOOM_Event event = c->m_queue_front;
  70     if (!event)
  71         return 0;
  72     assert (c->m_queue_back);
  73     c->m_queue_front = event->prev;
  74     if (c->m_queue_front)
  75     {
  76         assert (c->m_queue_back);
  77         c->m_queue_front->next = 0;
  78     }
  79     else
  80         c->m_queue_back = 0;
  81     c->last_event = event->kind;
  82     return event;
  83 }
  84
  85
  86 static void set_dset_error (ZOOM_connection c, int error,
  87                             const char *dset,
  88                             const char *addinfo, const char *addinfo2)
  89 {
  90     xfree (c->addinfo);
  91     c->addinfo = 0;
  92     c->error = error;
  93     c->diagset = dset;
  94     if (addinfo && addinfo2)
  95     {
  96         c->addinfo = xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
  97         strcpy(c->addinfo, addinfo);
  98         strcat(c->addinfo, addinfo2);
  99     }
 100     else if (addinfo)
 101         c->addinfo = xstrdup(addinfo);
 102     if (error)
 103         yaz_log(LOG_DEBUG, "Error %s %s:%d %s %s",
 104                 c->host_port ? c->host_port : "<>", dset, error,
 105                 addinfo ? addinfo : "",
 106                 addinfo2 ? addinfo2 : "");
 107 }
 108
 109 static void set_HTTP_error (ZOOM_connection c, int error,
 110                             const char *addinfo, const char *addinfo2)
 111 {
 112     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 113 }
 114
 115 static void set_ZOOM_error (ZOOM_connection c, int error,
 116                             const char *addinfo)
 117 {
 118     set_dset_error(c, error, "ZOOM", addinfo, 0);
 119 }
 120
 121 static void clear_error (ZOOM_connection c)
 122 {
 123
 124     switch (c->error)
 125     {
 126     case ZOOM_ERROR_CONNECT:
 127     case ZOOM_ERROR_MEMORY:
 128     case ZOOM_ERROR_DECODE:
 129     case ZOOM_ERROR_CONNECTION_LOST:
 130     case ZOOM_ERROR_INIT:
 131     case ZOOM_ERROR_INTERNAL:
 132     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 133         break;
 134     default:
 135         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 136     }
 137 }
 138
 139 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 140 {
 141     ZOOM_task *taskp = &c->tasks;
 142     while (*taskp)
 143         taskp = &(*taskp)->next;
 144     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 145     (*taskp)->running = 0;
 146     (*taskp)->which = which;
 147     (*taskp)->next = 0;
 148     clear_error (c);
 149     return *taskp;
 150 }
 151
 152 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 153 {
 154     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 155
 156     task->next = c->tasks;
 157     c->tasks = task;
 158
 159     task->running = 0;
 160     task->which = which;
 161     clear_error (c);
 162     return task;
 163 }
 164
 165 void ZOOM_connection_remove_task (ZOOM_connection c)
 166 {
 167     ZOOM_task task = c->tasks;
 168
 169     if (task)
 170     {
 171         c->tasks = task->next;
 172         switch (task->which)
 173         {
 174         case ZOOM_TASK_SEARCH:
 175             ZOOM_resultset_destroy (task->u.search.resultset);
 176             break;
 177         case ZOOM_TASK_RETRIEVE:
 178             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 179             break;
 180         case ZOOM_TASK_CONNECT:
 181             break;
 182         case ZOOM_TASK_SCAN:
 183             ZOOM_scanset_destroy (task->u.scan.scan);
 184             break;
 185         case ZOOM_TASK_PACKAGE:
 186             ZOOM_package_destroy (task->u.package);
 187             break;
 188         default:
 189             assert (0);
 190         }
 191         xfree (task);
 192     }
 193 }
 194
 195 static int ZOOM_connection_exec_task (ZOOM_connection c);
 196
 197 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 198 {
 199     while (c->tasks)
 200         ZOOM_connection_remove_task(c);
 201 }
 202
 203 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 204
 205 ZOOM_API(ZOOM_connection)
 206 ZOOM_connection_create (ZOOM_options options)
 207 {
 208     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 209
 210     c->proto = PROTO_Z3950;
 211     c->cs = 0;
 212     c->mask = 0;
 213     c->reconnect_ok = 0;
 214     c->state = STATE_IDLE;
 215     c->addinfo = 0;
 216     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 217     c->buf_in = 0;
 218     c->len_in = 0;
 219     c->buf_out = 0;
 220     c->len_out = 0;
 221     c->resultsets = 0;
 222
 223     c->options = ZOOM_options_create_with_parent(options);
 224
 225     c->host_port = 0;
 226     c->path = 0;
 227     c->proxy = 0;
 228
 229     c->charset = c->lang = 0;
 230
 231     c->cookie_out = 0;
 232     c->cookie_in = 0;
 233     c->client_IP = 0;
 234     c->tasks = 0;
 235
 236     c->odr_in = odr_createmem (ODR_DECODE);
 237     c->odr_out = odr_createmem (ODR_ENCODE);
 238
 239     c->async = 0;
 240     c->support_named_resultsets = 0;
 241     c->last_event = ZOOM_EVENT_NONE;
 242
 243     c->m_queue_front = 0;
 244     c->m_queue_back = 0;
 245     return c;
 246 }
 247
 248 /* set database names. Take local databases (if set); otherwise
 249    take databases given in ZURL (if set); otherwise use Default */
 250 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 251                                  int *num)
 252 {
 253     char **databaseNames;
 254     const char *c;
 255     int no = 2;
 256     const char *cp = ZOOM_options_get (options, "databaseName");
 257
 258     if (!cp || !*cp)
 259     {
 260         if (strncmp (con->host_port, "unix:", 5) == 0)
 261             cp = strchr (con->host_port+5, ':');
 262         else
 263             cp = strchr (con->host_port, '/');
 264         if (cp)
 265             cp++;
 266     }
 267     if (cp)
 268     {
 269         c = cp;
 270         while ((c = strchr(c, '+')))
 271         {
 272             c++;
 273             no++;
 274         }
 275     }
 276     else
 277         cp = "Default";
 278     databaseNames = (char**)
 279         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 280     no = 0;
 281     while (*cp)
 282     {
 283         c = strchr (cp, '+');
 284         if (!c)
 285             c = cp + strlen(cp);
 286         else if (c == cp)
 287         {
 288             cp++;
 289             continue;
 290         }
 291         /* cp ptr to first char of db name, c is char
 292            following db name */
 293         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 294         memcpy (databaseNames[no], cp, c-cp);
 295         databaseNames[no++][c-cp] = '\0';
 296         cp = c;
 297         if (*cp)
 298             cp++;
 299     }
 300     databaseNames[no] = NULL;
 301     *num = no;
 302     return databaseNames;
 303 }
 304
 305 ZOOM_API(ZOOM_connection)
 306 ZOOM_connection_new (const char *host, int portnum)
 307 {
 308     ZOOM_connection c = ZOOM_connection_create (0);
 309
 310     ZOOM_connection_connect (c, host, portnum);
 311     return c;
 312 }
 313
 314 ZOOM_API(void)
 315 ZOOM_connection_connect(ZOOM_connection c,
 316                         const char *host, int portnum)
 317 {
 318     const char *val;
 319     ZOOM_task task;
 320
 321     if (c->cs)
 322     {
 323         yaz_log (LOG_DEBUG, "reconnect");
 324         c->reconnect_ok = 1;
 325         return;
 326     }
 327     yaz_log(LOG_DEBUG, "connect");
 328     xfree (c->proxy);
 329     val = ZOOM_options_get (c->options, "proxy");
 330     if (val && *val)
 331         c->proxy = xstrdup (val);
 332     else
 333         c->proxy = 0;
 334
 335     xfree (c->charset);
 336     val = ZOOM_options_get (c->options, "charset");
 337     if (val && *val)
 338         c->charset = xstrdup (val);
 339     else
 340         c->charset = 0;
 341
 342     xfree (c->lang);
 343     val = ZOOM_options_get (c->options, "lang");
 344     if (val && *val)
 345         c->lang = xstrdup (val);
 346     else
 347         c->lang = 0;
 348
 349     xfree (c->host_port);
 350     if (portnum)
 351     {
 352         char hostn[128];
 353         sprintf (hostn, "%.80s:%d", host, portnum);
 354         c->host_port = xstrdup(hostn);
 355     }
 356     else
 357         c->host_port = xstrdup(host);
 358
 359     ZOOM_options_set(c->options, "host", c->host_port);
 360
 361     val = ZOOM_options_get (c->options, "cookie");
 362     if (val && *val)
 363         c->cookie_out = xstrdup (val);
 364
 365     val = ZOOM_options_get (c->options, "clientIP");
 366     if (val && *val)
 367         c->client_IP = xstrdup (val);
 368
 369     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 370
 371     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 372
 373     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 374
 375     if (!c->async)
 376     {
 377         while (ZOOM_event (1, &c))
 378             ;
 379     }
 380 }
 381
 382 ZOOM_API(ZOOM_query)
 383 ZOOM_query_create(void)
 384 {
 385     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 386
 387     s->refcount = 1;
 388     s->z_query = 0;
 389     s->sort_spec = 0;
 390     s->odr = odr_createmem (ODR_ENCODE);
 391
 392     return s;
 393 }
 394
 395 ZOOM_API(void)
 396 ZOOM_query_destroy(ZOOM_query s)
 397 {
 398     if (!s)
 399         return;
 400
 401     (s->refcount)--;
 402     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 403     if (s->refcount == 0)
 404     {
 405         odr_destroy (s->odr);
 406         xfree (s);
 407     }
 408 }
 409
 410 ZOOM_API(int)
 411 ZOOM_query_prefix(ZOOM_query s, const char *str)
 412 {
 413     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 414     s->z_query->which = Z_Query_type_1;
 415     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 416     if (!s->z_query->u.type_1)
 417         return -1;
 418     return 0;
 419 }
 420
 421 ZOOM_API(int)
 422 ZOOM_query_cql(ZOOM_query s, const char *str)
 423 {
 424     Z_External *ext;
 425
 426     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 427     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 428     ext->indirect_reference = 0;
 429     ext->descriptor = 0;
 430     ext->which = Z_External_CQL;
 431     ext->u.cql = odr_strdup(s->odr, str);
 432
 433     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 434     s->z_query->which = Z_Query_type_104;
 435     s->z_query->u.type_104 =  ext;
 436     return 0;
 437 }
 438
 439 ZOOM_API(int)
 440 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 441 {
 442     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 443     if (!s->sort_spec)
 444         return -1;
 445     return 0;
 446 }
 447
 448 static zoom_ret do_write(ZOOM_connection c);
 449
 450 ZOOM_API(void)
 451 ZOOM_connection_destroy(ZOOM_connection c)
 452 {
 453     ZOOM_resultset r;
 454     if (!c)
 455         return;
 456     if (c->cs)
 457         cs_close (c->cs);
 458     for (r = c->resultsets; r; r = r->next)
 459         r->connection = 0;
 460
 461     xfree (c->buf_in);
 462     xfree (c->addinfo);
 463     odr_destroy (c->odr_in);
 464     odr_destroy (c->odr_out);
 465     ZOOM_options_destroy (c->options);
 466     ZOOM_connection_remove_tasks (c);
 467     xfree (c->host_port);
 468     xfree (c->path);
 469     xfree (c->proxy);
 470     xfree (c->charset);
 471     xfree (c->lang);
 472     xfree (c->cookie_out);
 473     xfree (c->cookie_in);
 474     xfree (c->client_IP);
 475     xfree (c);
 476 }
 477
 478 void ZOOM_resultset_addref (ZOOM_resultset r)
 479 {
 480     if (r)
 481     {
 482         (r->refcount)++;
 483         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 484                  r, r->refcount);
 485     }
 486 }
 487 ZOOM_resultset ZOOM_resultset_create ()
 488 {
 489     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 490
 491     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 492     r->refcount = 1;
 493     r->size = 0;
 494     r->odr = odr_createmem (ODR_ENCODE);
 495     r->start = 0;
 496     r->piggyback = 1;
 497     r->setname = 0;
 498     r->schema = 0;
 499     r->count = 0;
 500     r->record_cache = 0;
 501     r->r_sort_spec = 0;
 502     r->z_query = 0;
 503     r->search = 0;
 504     r->connection = 0;
 505     r->next = 0;
 506     return r;
 507 }
 508
 509 ZOOM_API(ZOOM_resultset)
 510 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 511 {
 512     ZOOM_resultset r;
 513     ZOOM_query s = ZOOM_query_create();
 514
 515     ZOOM_query_prefix (s, q);
 516
 517     r = ZOOM_connection_search (c, s);
 518     ZOOM_query_destroy (s);
 519     return r;
 520 }
 521
 522 ZOOM_API(ZOOM_resultset)
 523 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 524 {
 525     ZOOM_resultset r = ZOOM_resultset_create ();
 526     ZOOM_task task;
 527     const char *cp;
 528
 529     r->r_sort_spec = q->sort_spec;
 530     r->z_query = q->z_query;
 531     r->search = q;
 532
 533     r->options = ZOOM_options_create_with_parent(c->options);
 534
 535     r->start = ZOOM_options_get_int(r->options, "start", 0);
 536     r->count = ZOOM_options_get_int(r->options, "count", 0);
 537     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 538     cp = ZOOM_options_get (r->options, "setname");
 539     if (cp)
 540         r->setname = xstrdup(cp);
 541     cp = ZOOM_options_get (r->options, "schema");
 542     if (cp)
 543         r->schema = xstrdup(cp);
 544
 545     r->connection = c;
 546
 547     r->next = c->resultsets;
 548     c->resultsets = r;
 549
 550     if (c->host_port && c->proto == PROTO_SRW)
 551     {
 552         if (!c->cs)
 553         {
 554             yaz_log(LOG_DEBUG, "NO COMSTACK");
 555             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 556         }
 557         else
 558         {
 559             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 560             c->reconnect_ok = 1;
 561         }
 562     }
 563
 564     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 565     task->u.search.resultset = r;
 566     ZOOM_resultset_addref (r);
 567
 568     (q->refcount)++;
 569
 570     if (!c->async)
 571     {
 572         while (ZOOM_event (1, &c))
 573             ;
 574     }
 575     return r;
 576 }
 577
 578 ZOOM_API(void)
 579 ZOOM_resultset_destroy(ZOOM_resultset r)
 580 {
 581     if (!r)
 582         return;
 583     (r->refcount)--;
 584     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 585              r, r->refcount);
 586     if (r->refcount == 0)
 587     {
 588         ZOOM_record_cache rc;
 589
 590         for (rc = r->record_cache; rc; rc = rc->next)
 591             if (rc->rec.wrbuf_marc)
 592                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 593         if (r->connection)
 594         {
 595             /* remove ourselves from the resultsets in connection */
 596             ZOOM_resultset *rp = &r->connection->resultsets;
 597             while (1)
 598             {
 599                 assert (*rp);   /* we must be in this list!! */
 600                 if (*rp == r)
 601                 {   /* OK, we're here - take us out of it */
 602                     *rp = (*rp)->next;
 603                     break;
 604                 }
 605                 rp = &(*rp)->next;
 606             }
 607         }
 608         ZOOM_query_destroy (r->search);
 609         ZOOM_options_destroy (r->options);
 610         odr_destroy (r->odr);
 611         xfree (r->setname);
 612         xfree (r->schema);
 613         xfree (r);
 614     }
 615 }
 616
 617 ZOOM_API(size_t)
 618 ZOOM_resultset_size (ZOOM_resultset r)
 619 {
 620     return r->size;
 621 }
 622
 623 static void do_close (ZOOM_connection c)
 624 {
 625     if (c->cs)
 626         cs_close(c->cs);
 627     c->cs = 0;
 628     c->mask = 0;
 629     c->state = STATE_IDLE;
 630 }
 631
 632 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 633                                      int force_sync, int start, int count)
 634 {
 635     ZOOM_task task;
 636     ZOOM_connection c;
 637     const char *cp;
 638
 639     if (!r)
 640         return;
 641     c = r->connection;
 642     if (!c)
 643         return;
 644
 645     if (c->host_port && c->proto == PROTO_SRW)
 646     {
 647         if (!c->cs)
 648         {
 649             yaz_log(LOG_DEBUG, "NO COMSTACK");
 650             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 651         }
 652         else
 653         {
 654             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 655             c->reconnect_ok = 1;
 656         }
 657     }
 658     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 659     task->u.retrieve.resultset = r;
 660     task->u.retrieve.start = start;
 661     task->u.retrieve.count = count;
 662
 663     cp = ZOOM_options_get (r->options, "schema");
 664     if (cp)
 665     {
 666         if (!r->schema || strcmp(r->schema, cp))
 667         {
 668             xfree(r->schema);
 669             r->schema = xstrdup(cp);
 670         }
 671     }
 672
 673     ZOOM_resultset_addref (r);
 674
 675     if (!r->connection->async || force_sync)
 676         while (r->connection && ZOOM_event (1, &r->connection))
 677             ;
 678 }
 679
 680 ZOOM_API(void)
 681 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 682                         size_t start, size_t count)
 683 {
 684     int force_present = 0;
 685
 686     if (!r)
 687         return ;
 688     if (count && recs)
 689         force_present = 1;
 690     ZOOM_resultset_retrieve (r, force_present, start, count);
 691     if (force_present)
 692     {
 693         size_t i;
 694         for (i = 0; i< count; i++)
 695             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 696     }
 697 }
 698
 699 static zoom_ret do_connect (ZOOM_connection c)
 700 {
 701     void *add;
 702     const char *effective_host;
 703
 704     if (c->proxy)
 705         effective_host = c->proxy;
 706     else
 707         effective_host = c->host_port;
 708
 709     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 710
 711     assert (!c->cs);
 712
 713     if (memcmp(c->host_port, "http:", 5) == 0)
 714     {
 715 #if HAVE_XML2
 716         const char *path;
 717         c->proto = PROTO_SRW;
 718         effective_host = c->host_port + 5;
 719         if (*effective_host == '/')
 720             effective_host++;
 721         if (*effective_host == '/')
 722             effective_host++;
 723         if (!(path = strchr(effective_host, '/')))
 724             path = "/";
 725         xfree(c->path);
 726         c->path = xstrdup(path);
 727 #else
 728         c->state = STATE_IDLE;
 729         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 730         return zoom_complete;
 731 #endif
 732     }
 733     c->cs = cs_create_host (effective_host, 0, &add);
 734
 735     if (c->cs)
 736     {
 737         int ret = cs_connect (c->cs, add);
 738         if (ret == 0)
 739         {
 740             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 741             ZOOM_connection_put_event(c, event);
 742             if (c->proto == PROTO_Z3950)
 743                 ZOOM_connection_send_init(c);
 744             else
 745             {
 746                 /* no init request for SRW .. */
 747                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 748                 ZOOM_connection_remove_task (c);
 749                 c->mask = 0;
 750                 ZOOM_connection_exec_task (c);
 751             }
 752             c->state = STATE_ESTABLISHED;
 753             return zoom_pending;
 754         }
 755         else if (ret > 0)
 756         {
 757             c->state = STATE_CONNECTING;
 758             c->mask = ZOOM_SELECT_EXCEPT;
 759             if (c->cs->io_pending & CS_WANT_WRITE)
 760                 c->mask += ZOOM_SELECT_WRITE;
 761             if (c->cs->io_pending & CS_WANT_READ)
 762                 c->mask += ZOOM_SELECT_READ;
 763             return zoom_pending;
 764         }
 765     }
 766     c->state = STATE_IDLE;
 767     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 768     return zoom_complete;
 769 }
 770
 771 int z3950_connection_socket(ZOOM_connection c)
 772 {
 773     if (c->cs)
 774         return cs_fileno(c->cs);
 775     return -1;
 776 }
 777
 778 int z3950_connection_mask(ZOOM_connection c)
 779 {
 780     if (c->cs)
 781         return c->mask;
 782     return 0;
 783 }
 784
 785 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 786 {
 787     int i;
 788     for (i = 0; i<200; i++)
 789     {
 790         size_t len;
 791         Z_OtherInformation **oi;
 792         char buf[80];
 793         const char *val;
 794         const char *cp;
 795         int oidval;
 796
 797         sprintf (buf, "otherInfo%d", i);
 798         val = ZOOM_options_get (c->options, buf);
 799         if (!val)
 800             break;
 801         cp = strchr (val, ':');
 802         if (!cp)
 803             continue;
 804         len = cp - val;
 805         if (len >= sizeof(buf))
 806             len = sizeof(buf)-1;
 807         memcpy (buf, val, len);
 808         buf[len] = '\0';
 809         oidval = oid_getvalbyname (buf);
 810         if (oidval == VAL_NONE)
 811             continue;
 812
 813         yaz_oi_APDU(a, &oi);
 814         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 815     }
 816 }
 817
 818 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 819 {
 820     assert (a);
 821     if (c->cookie_out)
 822     {
 823         Z_OtherInformation **oi;
 824         yaz_oi_APDU(a, &oi);
 825         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 826     }
 827     if (c->client_IP)
 828     {
 829         Z_OtherInformation **oi;
 830         yaz_oi_APDU(a, &oi);
 831         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 832     }
 833     otherInfo_attach (c, a, out);
 834     if (!z_APDU(out, &a, 0, 0))
 835     {
 836         FILE *outf = fopen("/tmp/apdu.txt", "a");
 837         if (a && outf)
 838         {
 839             ODR odr_pr = odr_createmem(ODR_PRINT);
 840             fprintf (outf, "a=%p\n", a);
 841             odr_setprint(odr_pr, outf);
 842             z_APDU(odr_pr, &a, 0, 0);
 843             odr_destroy(odr_pr);
 844         }
 845         yaz_log (LOG_DEBUG, "encoding failed");
 846         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 847         odr_reset(out);
 848         return -1;
 849     }
 850
 851     return 0;
 852 }
 853
 854 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 855 {
 856     ZOOM_Event event;
 857     assert (a);
 858     if (encode_APDU(c, a, c->odr_out))
 859         return zoom_complete;
 860     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 861     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 862     ZOOM_connection_put_event (c, event);
 863     odr_reset(c->odr_out);
 864     return do_write (c);
 865 }
 866
 867 /* returns 1 if PDU was sent OK (still pending )
 868            0 if PDU was not sent OK (nothing to wait for)
 869 */
 870
 871 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 872 {
 873     const char *impname;
 874     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 875     Z_InitRequest *ireq = apdu->u.initRequest;
 876     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 877         odr_malloc(c->odr_out, sizeof(*auth));
 878     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 879     const char *auth_userId = ZOOM_options_get (c->options, "user");
 880     const char *auth_password = ZOOM_options_get (c->options, "pass");
 881
 882     ODR_MASK_SET(ireq->options, Z_Options_search);
 883     ODR_MASK_SET(ireq->options, Z_Options_present);
 884     ODR_MASK_SET(ireq->options, Z_Options_scan);
 885     ODR_MASK_SET(ireq->options, Z_Options_sort);
 886     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 887     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 888
 889     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 890     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 891     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 892
 893     impname = ZOOM_options_get (c->options, "implementationName");
 894     ireq->implementationName =
 895         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 896     strcpy (ireq->implementationName, "");
 897     if (impname)
 898     {
 899         strcat (ireq->implementationName, impname);
 900         strcat (ireq->implementationName, "/");
 901     }
 902     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 903
 904     *ireq->maximumRecordSize =
 905         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 906     *ireq->preferredMessageSize =
 907         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 908
 909     if (auth_groupId || auth_password)
 910     {
 911         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 912         int i = 0;
 913         pass->groupId = 0;
 914         if (auth_groupId && *auth_groupId)
 915         {
 916             pass->groupId = (char *)
 917                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 918             strcpy(pass->groupId, auth_groupId);
 919             i++;
 920         }
 921         pass->userId = 0;
 922         if (auth_userId && *auth_userId)
 923         {
 924             pass->userId = (char *)
 925                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 926             strcpy(pass->userId, auth_userId);
 927             i++;
 928         }
 929         pass->password = 0;
 930         if (auth_password && *auth_password)
 931         {
 932             pass->password = (char *)
 933                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 934             strcpy(pass->password, auth_password);
 935             i++;
 936         }
 937         if (i)
 938         {
 939             auth->which = Z_IdAuthentication_idPass;
 940             auth->u.idPass = pass;
 941             ireq->idAuthentication = auth;
 942         }
 943     }
 944     else if (auth_userId)
 945     {
 946         auth->which = Z_IdAuthentication_open;
 947         auth->u.open = (char *)
 948             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 949         strcpy(auth->u.open, auth_userId);
 950         ireq->idAuthentication = auth;
 951     }
 952     if (c->proxy)
 953         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 954                                  VAL_PROXY, 1, c->host_port);
 955     if (c->charset||c->lang)
 956     {
 957         Z_OtherInformation **oi;
 958         Z_OtherInformationUnit *oi_unit;
 959
 960         yaz_oi_APDU(apdu, &oi);
 961
 962         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 963         {
 964             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 965
 966             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 967             oi_unit->information.externallyDefinedInfo =
 968                 yaz_set_proposal_charneg
 969                 (c->odr_out,
 970                  (const char **)&c->charset, (c->charset) ? 1:0,
 971                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 972         }
 973     }
 974     assert (apdu);
 975     return send_APDU (c, apdu);
 976 }
 977
 978 #if HAVE_XML2
 979 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_searchRetrieve *sr)
 980 {
 981     Z_SOAP_Handler h[2] = {
 982         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 983         {0, 0, 0}
 984     };
 985     ODR o = odr_createmem(ODR_ENCODE);
 986     int ret;
 987     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 988     Z_GDU *gdu;
 989     ZOOM_Event event;
 990
 991     gdu = z_get_HTTP_Request(c->odr_out);
 992     gdu->u.HTTP_Request->path = c->path;
 993     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 994                       "Content-Type", "text/xml");
 995     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 996                       "SOAPAction", "\"\"");
 997     p->which = Z_SOAP_generic;
 998     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
 999     p->u.generic->no = 0;
1000     p->u.generic->ns = 0;
1001     p->u.generic->p = sr;
1002     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1003
1004     ret = z_soap_codec(o, &p,
1005                        &gdu->u.HTTP_Request->content_buf,
1006                        &gdu->u.HTTP_Request->content_len, h);
1007
1008     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1009         return zoom_complete;
1010     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1011
1012     odr_destroy(o);
1013
1014     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1015     ZOOM_connection_put_event (c, event);
1016     odr_reset(c->odr_out);
1017     return do_write (c);
1018 }
1019 #endif
1020
1021 #if HAVE_XML2
1022 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1023 {
1024     int i;
1025     ZOOM_resultset resultset = 0;
1026     Z_SRW_searchRetrieve *sr = 0;
1027
1028     if (c->error)                  /* don't continue on error */
1029         return zoom_complete;
1030     assert (c->tasks);
1031     if (c->tasks->which == ZOOM_TASK_SEARCH)
1032     {
1033         resultset = c->tasks->u.search.resultset;
1034         resultset->setname = xstrdup ("default");
1035         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1036     }
1037     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1038     {
1039         resultset = c->tasks->u.retrieve.resultset;
1040
1041         resultset->start = c->tasks->u.retrieve.start;
1042         resultset->count = c->tasks->u.retrieve.count;
1043
1044         if (resultset->start >= resultset->size)
1045             return zoom_complete;
1046         if (resultset->start + resultset->count > resultset->size)
1047             resultset->count = resultset->size - resultset->start;
1048
1049         for (i = 0; i<resultset->count; i++)
1050         {
1051             ZOOM_record rec =
1052                 record_cache_lookup (resultset, i + resultset->start);
1053             if (!rec)
1054                 break;
1055         }
1056         if (i == resultset->count)
1057             return zoom_complete;
1058     }
1059     assert(resultset->z_query);
1060
1061     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1062
1063     if (resultset->z_query->which == Z_Query_type_104
1064         && resultset->z_query->u.type_104->which == Z_External_CQL)
1065         sr->u.request->query = resultset->z_query->u.type_104->u.cql;
1066     else if (resultset->z_query->which == Z_Query_type_1 &&
1067              resultset->z_query->u.type_1)
1068     {
1069         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1070         return zoom_complete;
1071     }
1072     else
1073     {
1074         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1075         return zoom_complete;
1076     }
1077     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1078     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
1079     sr->u.request->recordSchema = resultset->schema;
1080
1081
1082     return send_srw(c, sr);
1083 }
1084 #else
1085 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1086 {
1087     return zoom_complete;
1088 }
1089 #endif
1090
1091 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1092 {
1093     ZOOM_resultset r;
1094     int lslb, ssub, mspn;
1095     const char *syntax;
1096     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1097     Z_SearchRequest *search_req = apdu->u.searchRequest;
1098     const char *elementSetName;
1099     const char *smallSetElementSetName;
1100     const char *mediumSetElementSetName;
1101
1102     assert (c->tasks);
1103     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1104
1105     r = c->tasks->u.search.resultset;
1106
1107     elementSetName =
1108         ZOOM_options_get (r->options, "elementSetName");
1109     smallSetElementSetName  =
1110         ZOOM_options_get (r->options, "smallSetElementSetName");
1111     mediumSetElementSetName =
1112         ZOOM_options_get (r->options, "mediumSetElementSetName");
1113
1114     if (!smallSetElementSetName)
1115         smallSetElementSetName = elementSetName;
1116
1117     if (!mediumSetElementSetName)
1118         mediumSetElementSetName = elementSetName;
1119
1120     assert (r);
1121     assert (r->z_query);
1122
1123     /* prepare query for the search request */
1124     search_req->query = r->z_query;
1125
1126     search_req->databaseNames =
1127         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1128
1129     /* get syntax (no need to provide unless piggyback is in effect) */
1130     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1131
1132     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1133     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1134     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1135     if (lslb != -1 && ssub != -1 && mspn != -1)
1136     {
1137         /* So're a Z39.50 expert? Let's hope you don't do sort */
1138         *search_req->largeSetLowerBound = lslb;
1139         *search_req->smallSetUpperBound = ssub;
1140         *search_req->mediumSetPresentNumber = mspn;
1141     }
1142     else if (r->start == 0 && r->count > 0
1143              && r->piggyback && !r->r_sort_spec && !r->schema)
1144     {
1145         /* Regular piggyback - do it unless we're going to do sort */
1146         *search_req->largeSetLowerBound = 2000000000;
1147         *search_req->smallSetUpperBound = 0;
1148         *search_req->mediumSetPresentNumber = r->count;
1149         smallSetElementSetName = 0;
1150     }
1151     else
1152     {
1153         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1154         smallSetElementSetName = 0;
1155         mediumSetElementSetName = 0;
1156         syntax = 0;
1157     }
1158     if (smallSetElementSetName && *smallSetElementSetName)
1159     {
1160         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1161             odr_malloc (c->odr_out, sizeof(*esn));
1162
1163         esn->which = Z_ElementSetNames_generic;
1164         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1165         search_req->smallSetElementSetNames = esn;
1166     }
1167     if (mediumSetElementSetName && *mediumSetElementSetName)
1168     {
1169         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1170             odr_malloc (c->odr_out, sizeof(*esn));
1171
1172         esn->which = Z_ElementSetNames_generic;
1173         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1174         search_req->mediumSetElementSetNames = esn;
1175     }
1176     if (syntax)
1177         search_req->preferredRecordSyntax =
1178             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1179
1180     if (!r->setname)
1181     {
1182         if (c->support_named_resultsets)
1183         {
1184             char setname[14];
1185             int ord;
1186             /* find the lowest unused ordinal so that we re-use
1187                result sets on the server. */
1188             for (ord = 1; ; ord++)
1189             {
1190                 ZOOM_resultset rp;
1191                 sprintf (setname, "%d", ord);
1192                 for (rp = c->resultsets; rp; rp = rp->next)
1193                     if (rp->setname && !strcmp (rp->setname, setname))
1194                         break;
1195                 if (!rp)
1196                     break;
1197             }
1198             r->setname = xstrdup (setname);
1199             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1200         }
1201         else
1202             r->setname = xstrdup ("default");
1203         ZOOM_options_set (r->options, "setname", r->setname);
1204     }
1205     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1206     /* send search request */
1207     return send_APDU (c, apdu);
1208 }
1209
1210 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1211 {
1212     int oclass;
1213     Z_DefaultDiagFormat *r;
1214     char *addinfo = 0;
1215
1216     xfree (c->addinfo);
1217     c->addinfo = 0;
1218     if (p->which != Z_DiagRec_defaultFormat)
1219     {
1220         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1221         return;
1222     }
1223     r = p->u.defaultFormat;
1224     switch (r->which)
1225     {
1226     case Z_DefaultDiagFormat_v2Addinfo:
1227         addinfo = r->u.v2Addinfo;
1228         break;
1229     case Z_DefaultDiagFormat_v3Addinfo:
1230         addinfo = r->u.v3Addinfo;
1231         break;
1232     }
1233     set_dset_error(c, *r->condition,
1234                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1235                    addinfo, 0);
1236 }
1237
1238 ZOOM_API(ZOOM_record)
1239 ZOOM_record_clone (ZOOM_record srec)
1240 {
1241     char *buf;
1242     int size;
1243     ODR odr_enc;
1244     ZOOM_record nrec;
1245
1246     odr_enc = odr_createmem(ODR_ENCODE);
1247     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1248         return 0;
1249     buf = odr_getbuf (odr_enc, &size, 0);
1250
1251     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1252     nrec->odr = odr_createmem(ODR_DECODE);
1253     nrec->wrbuf_marc = 0;
1254     odr_setbuf (nrec->odr, buf, size, 0);
1255     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1256
1257     odr_destroy (odr_enc);
1258     return nrec;
1259 }
1260
1261 ZOOM_API(ZOOM_record)
1262 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1263 {
1264     return record_cache_lookup (s, pos);
1265 }
1266
1267 ZOOM_API(ZOOM_record)
1268 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1269 {
1270     ZOOM_resultset_retrieve (r, 1, pos, 1);
1271     return ZOOM_resultset_record_immediate (r, pos);
1272 }
1273
1274 ZOOM_API(void)
1275 ZOOM_record_destroy (ZOOM_record rec)
1276 {
1277     if (!rec)
1278         return;
1279     if (rec->wrbuf_marc)
1280         wrbuf_free (rec->wrbuf_marc, 1);
1281     odr_destroy (rec->odr);
1282     xfree (rec);
1283 }
1284
1285 ZOOM_API(const char *)
1286 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1287 {
1288     Z_NamePlusRecord *npr;
1289
1290     if (len)
1291         *len = 0; /* default return */
1292
1293     if (!rec)
1294         return 0;
1295     npr = rec->npr;
1296     if (!npr)
1297         return 0;
1298     if (!strcmp (type, "database"))
1299     {
1300         if (len)
1301             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1302         return npr->databaseName;
1303     }
1304     else if (!strcmp (type, "syntax"))
1305     {
1306         const char *desc = 0;
1307         if (npr->which == Z_NamePlusRecord_databaseRecord)
1308         {
1309             Z_External *r = (Z_External *) npr->u.databaseRecord;
1310             oident *ent = oid_getentbyoid(r->direct_reference);
1311             if (ent)
1312                 desc = ent->desc;
1313         }
1314         if (!desc)
1315             desc = "none";
1316         if (len)
1317             *len = strlen(desc);
1318         return desc;
1319     }
1320     else if (!strcmp (type, "render") &&
1321              npr->which == Z_NamePlusRecord_databaseRecord)
1322     {
1323         Z_External *r = (Z_External *) npr->u.databaseRecord;
1324         oident *ent = oid_getentbyoid(r->direct_reference);
1325
1326         if (r->which == Z_External_sutrs)
1327         {
1328             if (len) *len = r->u.sutrs->len;
1329             return (const char *) r->u.sutrs->buf;
1330         }
1331         else if (r->which == Z_External_octet)
1332         {
1333             yaz_marc_t mt;
1334             switch (ent->value)
1335             {
1336             case VAL_SOIF:
1337             case VAL_HTML:
1338             case VAL_SUTRS:
1339                 break;
1340             case VAL_TEXT_XML:
1341             case VAL_APPLICATION_XML:
1342                 break;
1343             default:
1344                 if (!rec->wrbuf_marc)
1345                     rec->wrbuf_marc = wrbuf_alloc();
1346
1347                 mt = yaz_marc_create();
1348                 wrbuf_rewind (rec->wrbuf_marc);
1349                 if (yaz_marc_decode_wrbuf (
1350                         mt, (const char *) r->u.octet_aligned->buf,
1351                         r->u.octet_aligned->len,
1352                         rec->wrbuf_marc) > 0)
1353                 {
1354                     if (len)
1355                         *len = wrbuf_len(rec->wrbuf_marc);
1356                     yaz_marc_destroy(mt);
1357                     return wrbuf_buf(rec->wrbuf_marc);
1358                 }
1359                 yaz_marc_destroy(mt);
1360             }
1361             if (len)
1362                 *len = r->u.octet_aligned->len;
1363             return (const char *) r->u.octet_aligned->buf;
1364         }
1365         else if (r->which == Z_External_grs1)
1366         {
1367             if (!rec->wrbuf_marc)
1368                 rec->wrbuf_marc = wrbuf_alloc();
1369             wrbuf_rewind (rec->wrbuf_marc);
1370             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1371             if (len)
1372                 *len = wrbuf_len(rec->wrbuf_marc);
1373             return wrbuf_buf(rec->wrbuf_marc);
1374         }
1375         return 0;
1376     }
1377     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1378              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1379     {
1380         Z_External *r = (Z_External *) npr->u.databaseRecord;
1381         oident *ent = oid_getentbyoid(r->direct_reference);
1382
1383         if (r->which == Z_External_sutrs)
1384         {
1385             if (len) *len = r->u.sutrs->len;
1386             return (const char *) r->u.sutrs->buf;
1387         }
1388         else if (r->which == Z_External_octet)
1389         {
1390             yaz_marc_t mt;
1391             int marc_decode_type = YAZ_MARC_MARCXML;
1392
1393             if (!strcmp(type, "oai"))
1394                 marc_decode_type = YAZ_MARC_OAIMARC;
1395             switch (ent->value)
1396             {
1397             case VAL_SOIF:
1398             case VAL_HTML:
1399             case VAL_SUTRS:
1400                 break;
1401             case VAL_TEXT_XML:
1402             case VAL_APPLICATION_XML:
1403                 break;
1404             default:
1405                 if (!rec->wrbuf_marc)
1406                     rec->wrbuf_marc = wrbuf_alloc();
1407                 wrbuf_rewind (rec->wrbuf_marc);
1408                 mt = yaz_marc_create();
1409
1410                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1411                 if (yaz_marc_decode_wrbuf (
1412                         mt, (const char *) r->u.octet_aligned->buf,
1413                         r->u.octet_aligned->len,
1414                         rec->wrbuf_marc) > 0)
1415                 {
1416                     if (len)
1417                         *len = wrbuf_len(rec->wrbuf_marc);
1418                     yaz_marc_destroy(mt);
1419                     return wrbuf_buf(rec->wrbuf_marc);
1420                 }
1421                 yaz_marc_destroy(mt);
1422             }
1423             if (len) *len = r->u.octet_aligned->len;
1424             return (const char *) r->u.octet_aligned->buf;
1425         }
1426         else if (r->which == Z_External_grs1)
1427         {
1428             if (len) *len = 5;
1429             return "GRS-1";
1430         }
1431         return 0;
1432     }
1433     else if (!strcmp (type, "raw"))
1434     {
1435         if (npr->which == Z_NamePlusRecord_databaseRecord)
1436         {
1437             Z_External *r = (Z_External *) npr->u.databaseRecord;
1438
1439             if (r->which == Z_External_sutrs)
1440             {
1441                 if (len) *len = r->u.sutrs->len;
1442                 return (const char *) r->u.sutrs->buf;
1443             }
1444             else if (r->which == Z_External_octet)
1445             {
1446                 if (len) *len = r->u.octet_aligned->len;
1447                 return (const char *) r->u.octet_aligned->buf;
1448             }
1449             else /* grs-1, explain, ... */
1450             {
1451                 if (len) *len = -1;
1452                 return (const char *) npr->u.databaseRecord;
1453             }
1454         }
1455         return 0;
1456     }
1457     else if (!strcmp (type, "ext"))
1458     {
1459         if (npr->which == Z_NamePlusRecord_databaseRecord)
1460             return (const char *) npr->u.databaseRecord;
1461         return 0;
1462     }
1463     return 0;
1464 }
1465
1466 static int strcmp_null(const char *v1, const char *v2)
1467 {
1468     if (!v1 && !v2)
1469         return 0;
1470     if (!v1 || !v2)
1471         return -1;
1472     return strcmp(v1, v2);
1473 }
1474
1475 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1476                               int pos)
1477 {
1478     ZOOM_record_cache rc;
1479     const char *elementSetName =
1480         ZOOM_resultset_option_get (r, "elementSetName");
1481     const char *syntax =
1482         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1483
1484     for (rc = r->record_cache; rc; rc = rc->next)
1485     {
1486         if (pos == rc->pos)
1487         {
1488             if (strcmp_null(r->schema, rc->schema))
1489                 continue;
1490             if (strcmp_null(elementSetName,rc->elementSetName))
1491                 continue;
1492             if (strcmp_null(syntax, rc->syntax))
1493                 continue;
1494             /* not destroying rc->npr (it's handled by nmem )*/
1495             rc->rec.npr = npr;
1496             /* keeping wrbuf_marc too */
1497             return;
1498         }
1499     }
1500     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1501     rc->rec.npr = npr;
1502     rc->rec.odr = 0;
1503     rc->rec.wrbuf_marc = 0;
1504     if (elementSetName)
1505         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1506     else
1507         rc->elementSetName = 0;
1508
1509     if (syntax)
1510         rc->syntax = odr_strdup (r->odr, syntax);
1511     else
1512         rc->syntax = 0;
1513
1514     if (r->schema)
1515         rc->schema = odr_strdup (r->odr, r->schema);
1516     else
1517         rc->schema = 0;
1518
1519     rc->pos = pos;
1520     rc->next = r->record_cache;
1521     r->record_cache = rc;
1522 }
1523
1524 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1525 {
1526     ZOOM_record_cache rc;
1527     const char *elementSetName =
1528         ZOOM_resultset_option_get (r, "elementSetName");
1529     const char *syntax =
1530         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1531
1532     for (rc = r->record_cache; rc; rc = rc->next)
1533     {
1534         if (pos == rc->pos)
1535         {
1536             if (strcmp_null(r->schema, rc->schema))
1537                 continue;
1538             if (strcmp_null(elementSetName,rc->elementSetName))
1539                 continue;
1540             if (strcmp_null(syntax, rc->syntax))
1541                 continue;
1542             return &rc->rec;
1543         }
1544     }
1545     return 0;
1546 }
1547
1548 static void handle_records (ZOOM_connection c, Z_Records *sr,
1549                             int present_phase)
1550 {
1551     ZOOM_resultset resultset;
1552
1553     if (!c->tasks)
1554         return ;
1555     switch (c->tasks->which)
1556     {
1557     case ZOOM_TASK_SEARCH:
1558         resultset = c->tasks->u.search.resultset;
1559         break;
1560     case ZOOM_TASK_RETRIEVE:
1561         resultset = c->tasks->u.retrieve.resultset;
1562         break;
1563     default:
1564         return;
1565     }
1566     if (sr && sr->which == Z_Records_NSD)
1567     {
1568         Z_DiagRec dr, *dr_p = &dr;
1569         dr.which = Z_DiagRec_defaultFormat;
1570         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1571
1572         response_diag (c, dr_p);
1573     }
1574     else if (sr && sr->which == Z_Records_multipleNSD)
1575     {
1576         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1577             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1578         else
1579             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1580     }
1581     else
1582     {
1583         if (resultset->count + resultset->start > resultset->size)
1584             resultset->count = resultset->size - resultset->start;
1585         if (resultset->count < 0)
1586             resultset->count = 0;
1587         if (sr && sr->which == Z_Records_DBOSD)
1588         {
1589             int i;
1590             NMEM nmem = odr_extract_mem (c->odr_in);
1591             Z_NamePlusRecordList *p =
1592                 sr->u.databaseOrSurDiagnostics;
1593             for (i = 0; i<p->num_records; i++)
1594             {
1595                 record_cache_add (resultset, p->records[i],
1596                                   i+ resultset->start);
1597             }
1598             /* transfer our response to search_nmem .. we need it later */
1599             nmem_transfer (resultset->odr->mem, nmem);
1600             nmem_destroy (nmem);
1601             if (present_phase && p->num_records == 0)
1602             {
1603                 /* present response and we didn't get any records! */
1604                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1605             }
1606         }
1607         else if (present_phase)
1608         {
1609             /* present response and we didn't get any records! */
1610             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1611         }
1612     }
1613 }
1614
1615 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1616 {
1617     handle_records (c, pr->records, 1);
1618 }
1619
1620 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1621 {
1622     ZOOM_resultset resultset;
1623
1624     yaz_log (LOG_DEBUG, "got search response");
1625
1626     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1627         return ;
1628
1629     resultset = c->tasks->u.search.resultset;
1630
1631     resultset->size = *sr->resultCount;
1632     handle_records (c, sr->records, 0);
1633 }
1634
1635 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1636 {
1637     if (res->diagnostics && res->num_diagnostics > 0)
1638         response_diag (c, res->diagnostics[0]);
1639 }
1640
1641 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1642 {
1643     NMEM nmem = odr_extract_mem (c->odr_in);
1644     ZOOM_scanset scan;
1645
1646     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1647         return 0;
1648     scan = c->tasks->u.scan.scan;
1649
1650     if (res->entries && res->entries->nonsurrogateDiagnostics)
1651         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1652     scan->scan_response = res;
1653     nmem_transfer (scan->odr->mem, nmem);
1654     if (res->stepSize)
1655         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1656     if (res->positionOfTerm)
1657         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1658     if (res->scanStatus)
1659         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1660     if (res->numberOfEntriesReturned)
1661         ZOOM_options_set_int (scan->options, "number",
1662                               *res->numberOfEntriesReturned);
1663     nmem_destroy (nmem);
1664     return 1;
1665 }
1666
1667 static zoom_ret send_sort (ZOOM_connection c)
1668 {
1669     ZOOM_resultset  resultset;
1670
1671     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1672         return zoom_complete;
1673
1674     resultset = c->tasks->u.search.resultset;
1675
1676     if (c->error)
1677     {
1678         resultset->r_sort_spec = 0;
1679         return zoom_complete;
1680     }
1681     if (resultset->r_sort_spec)
1682     {
1683         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1684         Z_SortRequest *req = apdu->u.sortRequest;
1685
1686         req->num_inputResultSetNames = 1;
1687         req->inputResultSetNames = (Z_InternationalString **)
1688             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1689         req->inputResultSetNames[0] =
1690             odr_strdup (c->odr_out, resultset->setname);
1691         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1692         req->sortSequence = resultset->r_sort_spec;
1693         resultset->r_sort_spec = 0;
1694         return send_APDU (c, apdu);
1695     }
1696     return zoom_complete;
1697 }
1698
1699 static zoom_ret send_present (ZOOM_connection c)
1700 {
1701     Z_APDU *apdu = 0;
1702     Z_PresentRequest *req = 0;
1703     int i = 0;
1704     const char *syntax = 0;
1705     const char *elementSetName = 0;
1706     ZOOM_resultset  resultset;
1707
1708     if (!c->tasks)
1709         return zoom_complete;
1710
1711     switch (c->tasks->which)
1712     {
1713     case ZOOM_TASK_SEARCH:
1714         resultset = c->tasks->u.search.resultset;
1715         break;
1716     case ZOOM_TASK_RETRIEVE:
1717         resultset = c->tasks->u.retrieve.resultset;
1718         resultset->start = c->tasks->u.retrieve.start;
1719         resultset->count = c->tasks->u.retrieve.count;
1720
1721         if (resultset->start >= resultset->size)
1722             return zoom_complete;
1723         if (resultset->start + resultset->count > resultset->size)
1724             resultset->count = resultset->size - resultset->start;
1725         break;
1726     default:
1727         return zoom_complete;
1728     }
1729
1730     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1731     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1732
1733     if (c->error)                  /* don't continue on error */
1734         return zoom_complete;
1735     if (resultset->start < 0)
1736         return zoom_complete;
1737     for (i = 0; i<resultset->count; i++)
1738     {
1739         ZOOM_record rec =
1740             record_cache_lookup (resultset, i + resultset->start);
1741         if (!rec)
1742             break;
1743     }
1744     if (i == resultset->count)
1745         return zoom_complete;
1746
1747     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1748     req = apdu->u.presentRequest;
1749
1750     resultset->start += i;
1751     resultset->count -= i;
1752     *req->resultSetStartPoint = resultset->start + 1;
1753     *req->numberOfRecordsRequested = resultset->count;
1754     assert (*req->numberOfRecordsRequested > 0);
1755
1756     if (syntax && *syntax)
1757         req->preferredRecordSyntax =
1758             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1759
1760     if (resultset->schema && *resultset->schema)
1761     {
1762         Z_RecordComposition *compo = (Z_RecordComposition *)
1763             odr_malloc (c->odr_out, sizeof(*compo));
1764
1765         req->recordComposition = compo;
1766         compo->which = Z_RecordComp_complex;
1767         compo->u.complex = (Z_CompSpec *)
1768             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1769         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1770             odr_malloc(c->odr_out, sizeof(bool_t));
1771         *compo->u.complex->selectAlternativeSyntax = 0;
1772
1773         compo->u.complex->generic = (Z_Specification *)
1774             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1775
1776         compo->u.complex->generic->which = Z_Schema_oid;
1777         compo->u.complex->generic->schema.oid = (Odr_oid *)
1778             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1779
1780         if (!compo->u.complex->generic->schema.oid)
1781         {
1782             /* OID wasn't a schema! Try record syntax instead. */
1783
1784             compo->u.complex->generic->schema.oid = (Odr_oid *)
1785                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1786         }
1787         if (elementSetName && *elementSetName)
1788         {
1789             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1790                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1791             compo->u.complex->generic->elementSpec->which =
1792                 Z_ElementSpec_elementSetName;
1793             compo->u.complex->generic->elementSpec->u.elementSetName =
1794                 odr_strdup (c->odr_out, elementSetName);
1795         }
1796         else
1797             compo->u.complex->generic->elementSpec = 0;
1798         compo->u.complex->num_dbSpecific = 0;
1799         compo->u.complex->dbSpecific = 0;
1800         compo->u.complex->num_recordSyntax = 0;
1801         compo->u.complex->recordSyntax = 0;
1802     }
1803     else if (elementSetName && *elementSetName)
1804     {
1805         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1806             odr_malloc (c->odr_out, sizeof(*esn));
1807         Z_RecordComposition *compo = (Z_RecordComposition *)
1808             odr_malloc (c->odr_out, sizeof(*compo));
1809
1810         esn->which = Z_ElementSetNames_generic;
1811         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1812         compo->which = Z_RecordComp_simple;
1813         compo->u.simple = esn;
1814         req->recordComposition = compo;
1815     }
1816     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1817     return send_APDU (c, apdu);
1818 }
1819
1820 ZOOM_API(ZOOM_scanset)
1821 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1822 {
1823     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1824
1825     scan->connection = c;
1826     scan->odr = odr_createmem (ODR_DECODE);
1827     scan->options = ZOOM_options_create_with_parent (c->options);
1828     scan->refcount = 1;
1829     scan->scan_response = 0;
1830
1831     if ((scan->termListAndStartPoint =
1832          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1833                       start)))
1834     {
1835         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1836         task->u.scan.scan = scan;
1837
1838         (scan->refcount)++;
1839         if (!c->async)
1840         {
1841             while (ZOOM_event (1, &c))
1842                 ;
1843         }
1844     }
1845     return scan;
1846 }
1847
1848 ZOOM_API(void)
1849 ZOOM_scanset_destroy (ZOOM_scanset scan)
1850 {
1851     if (!scan)
1852         return;
1853     (scan->refcount)--;
1854     if (scan->refcount == 0)
1855     {
1856         odr_destroy (scan->odr);
1857
1858         ZOOM_options_destroy (scan->options);
1859         xfree (scan);
1860     }
1861 }
1862
1863 static zoom_ret send_package (ZOOM_connection c)
1864 {
1865     ZOOM_Event event;
1866     if (!c->tasks)
1867         return zoom_complete;
1868     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1869
1870     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1871     ZOOM_connection_put_event (c, event);
1872
1873     return do_write_ex (c, c->tasks->u.package->buf_out,
1874                         c->tasks->u.package->len_out);
1875 }
1876
1877 static zoom_ret send_scan (ZOOM_connection c)
1878 {
1879     ZOOM_scanset scan;
1880     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1881     Z_ScanRequest *req = apdu->u.scanRequest;
1882     if (!c->tasks)
1883         return zoom_complete;
1884     assert (c->tasks->which == ZOOM_TASK_SCAN);
1885     scan = c->tasks->u.scan.scan;
1886
1887     req->termListAndStartPoint = scan->termListAndStartPoint;
1888     req->attributeSet = scan->attributeSet;
1889
1890     *req->numberOfTermsRequested =
1891         ZOOM_options_get_int(scan->options, "number", 10);
1892
1893     req->preferredPositionInResponse =
1894         odr_intdup (c->odr_out,
1895                     ZOOM_options_get_int(scan->options, "position", 1));
1896
1897     req->stepSize =
1898         odr_intdup (c->odr_out,
1899                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1900
1901     req->databaseNames = set_DatabaseNames (c, scan->options,
1902                                             &req->num_databaseNames);
1903
1904     return send_APDU (c, apdu);
1905 }
1906
1907 ZOOM_API(size_t)
1908 ZOOM_scanset_size (ZOOM_scanset scan)
1909 {
1910     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1911         return 0;
1912     return scan->scan_response->entries->num_entries;
1913 }
1914
1915 ZOOM_API(const char *)
1916 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1917                                int *occ, int *len)
1918 {
1919     const char *term = 0;
1920     size_t noent = ZOOM_scanset_size (scan);
1921     Z_ScanResponse *res = scan->scan_response;
1922
1923     *len = 0;
1924     *occ = 0;
1925     if (pos >= noent)
1926         return 0;
1927     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1928     {
1929         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1930
1931         if (t->term->which == Z_Term_general)
1932         {
1933             term = (const char *) t->term->u.general->buf;
1934             *len = t->term->u.general->len;
1935         }
1936         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1937     }
1938     return term;
1939 }
1940
1941 ZOOM_API(const char *)
1942 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1943 {
1944     return ZOOM_options_get (scan->options, key);
1945 }
1946
1947 ZOOM_API(void)
1948 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1949                               const char *val)
1950 {
1951     ZOOM_options_set (scan->options, key, val);
1952 }
1953
1954 static Z_APDU *create_es_package (ZOOM_package p, int type)
1955 {
1956     const char *str;
1957     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1958     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1959
1960     *req->function = Z_ExtendedServicesRequest_create;
1961
1962     str = ZOOM_options_get(p->options, "package-name");
1963     if (str && *str)
1964         req->packageName = nmem_strdup (p->odr_out->mem, str);
1965
1966     str = ZOOM_options_get(p->options, "user-id");
1967     if (str)
1968         req->userId = nmem_strdup (p->odr_out->mem, str);
1969
1970     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1971                                               type);
1972
1973     str = ZOOM_options_get(p->options, "function");
1974     if (str)
1975     {
1976         if (!strcmp (str, "create"))
1977             *req->function = 1;
1978         if (!strcmp (str, "delete"))
1979             *req->function = 2;
1980         if (!strcmp (str, "modify"))
1981             *req->function = 3;
1982     }
1983     return apdu;
1984 }
1985
1986 static const char *ill_array_lookup (void *clientData, const char *idx)
1987 {
1988     ZOOM_package p = (ZOOM_package) clientData;
1989     return ZOOM_options_get (p->options, idx+4);
1990 }
1991
1992 static Z_External *encode_ill_request (ZOOM_package p)
1993 {
1994     ODR out = p->odr_out;
1995     ILL_Request *req;
1996     Z_External *r = 0;
1997     struct ill_get_ctl ctl;
1998
1999     ctl.odr = p->odr_out;
2000     ctl.clientData = p;
2001     ctl.f = ill_array_lookup;
2002
2003     req = ill_get_ILLRequest(&ctl, "ill", 0);
2004
2005     if (!ill_Request (out, &req, 0, 0))
2006     {
2007         int ill_request_size;
2008         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2009         if (ill_request_buf)
2010             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2011         return 0;
2012     }
2013     else
2014     {
2015         oident oid;
2016         int illRequest_size = 0;
2017         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2018
2019         oid.proto = PROTO_GENERAL;
2020         oid.oclass = CLASS_GENERAL;
2021         oid.value = VAL_ISO_ILL_1;
2022
2023         r = (Z_External *) odr_malloc (out, sizeof(*r));
2024         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2025         r->indirect_reference = 0;
2026         r->descriptor = 0;
2027         r->which = Z_External_single;
2028
2029         r->u.single_ASN1_type = (Odr_oct *)
2030             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2031         r->u.single_ASN1_type->buf = (unsigned char*)
2032             odr_malloc (out, illRequest_size);
2033         r->u.single_ASN1_type->len = illRequest_size;
2034         r->u.single_ASN1_type->size = illRequest_size;
2035         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2036     }
2037     return r;
2038 }
2039
2040 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2041 {
2042     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2043     const char *str;
2044
2045     req->which=Z_IOItemOrder_esRequest;
2046     req->u.esRequest = (Z_IORequest *)
2047         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2048
2049     /* to keep part ... */
2050     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2051         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2052     req->u.esRequest->toKeep->supplDescription = 0;
2053     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2054         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2055
2056     str = ZOOM_options_get(p->options, "contact-name");
2057     req->u.esRequest->toKeep->contact->name = str ?
2058         nmem_strdup (p->odr_out->mem, str) : 0;
2059
2060     str = ZOOM_options_get(p->options, "contact-phone");
2061     req->u.esRequest->toKeep->contact->phone = str ?
2062         nmem_strdup (p->odr_out->mem, str) : 0;
2063
2064     str = ZOOM_options_get(p->options, "contact-email");
2065     req->u.esRequest->toKeep->contact->email = str ?
2066         nmem_strdup (p->odr_out->mem, str) : 0;
2067
2068     req->u.esRequest->toKeep->addlBilling = 0;
2069
2070     /* not to keep part ... */
2071     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2072         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2073
2074     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2075         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2076
2077     str = ZOOM_options_get(p->options, "itemorder-setname");
2078     if (!str)
2079         str = "default";
2080     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2081         nmem_strdup (p->odr_out->mem, str);
2082     req->u.esRequest->notToKeep->resultSetItem->item =
2083         (int *) odr_malloc(p->odr_out, sizeof(int));
2084
2085     str = ZOOM_options_get(p->options, "itemorder-item");
2086     *req->u.esRequest->notToKeep->resultSetItem->item =
2087         (str ? atoi(str) : 1);
2088
2089     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2090
2091     return req;
2092 }
2093
2094 ZOOM_API(void)
2095     ZOOM_package_send (ZOOM_package p, const char *type)
2096 {
2097     Z_APDU *apdu = 0;
2098     ZOOM_connection c;
2099     if (!p)
2100         return;
2101     c = p->connection;
2102     odr_reset (p->odr_out);
2103     xfree (p->buf_out);
2104     p->buf_out = 0;
2105     if (!strcmp(type, "itemorder"))
2106     {
2107         Z_External *r;
2108         apdu = create_es_package (p, VAL_ITEMORDER);
2109         if (apdu)
2110         {
2111             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2112
2113             r->direct_reference =
2114                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2115                                        VAL_ITEMORDER);
2116             r->descriptor = 0;
2117             r->which = Z_External_itemOrder;
2118             r->indirect_reference = 0;
2119             r->u.itemOrder = encode_item_order (p);
2120
2121             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2122         }
2123     }
2124     if (apdu)
2125     {
2126         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2127         {
2128             char *buf;
2129
2130             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2131             task->u.package = p;
2132             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2133             p->buf_out = (char *) xmalloc (p->len_out);
2134             memcpy (p->buf_out, buf, p->len_out);
2135
2136             (p->refcount)++;
2137             if (!c->async)
2138             {
2139                 while (ZOOM_event (1, &c))
2140                     ;
2141             }
2142         }
2143     }
2144 }
2145
2146 ZOOM_API(ZOOM_package)
2147     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2148 {
2149     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2150
2151     p->connection = c;
2152     p->odr_out = odr_createmem (ODR_ENCODE);
2153     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2154     p->refcount = 1;
2155     p->buf_out = 0;
2156     p->len_out = 0;
2157     return p;
2158 }
2159
2160 ZOOM_API(void)
2161     ZOOM_package_destroy(ZOOM_package p)
2162 {
2163     if (!p)
2164         return;
2165     (p->refcount)--;
2166     if (p->refcount == 0)
2167     {
2168         odr_destroy (p->odr_out);
2169         xfree (p->buf_out);
2170
2171         ZOOM_options_destroy (p->options);
2172         xfree (p);
2173     }
2174 }
2175
2176 ZOOM_API(const char *)
2177 ZOOM_package_option_get (ZOOM_package p, const char *key)
2178 {
2179     return ZOOM_options_get (p->options, key);
2180 }
2181
2182
2183 ZOOM_API(void)
2184 ZOOM_package_option_set (ZOOM_package p, const char *key,
2185                               const char *val)
2186 {
2187     ZOOM_options_set (p->options, key, val);
2188 }
2189
2190 static int ZOOM_connection_exec_task (ZOOM_connection c)
2191 {
2192     ZOOM_task task = c->tasks;
2193     zoom_ret ret = zoom_complete;
2194
2195     if (!task)
2196     {
2197         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2198         return 0;
2199     }
2200     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2201              task->which, task->running);
2202     if (c->error != ZOOM_ERROR_NONE)
2203     {
2204         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2205         ZOOM_connection_remove_tasks (c);
2206         return 0;
2207     }
2208     if (task->running)
2209     {
2210         yaz_log (LOG_DEBUG, "task already running");
2211         return 0;
2212     }
2213     task->running = 1;
2214     ret = zoom_complete;
2215     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2216     {
2217         switch (task->which)
2218         {
2219         case ZOOM_TASK_SEARCH:
2220             if (c->proto == PROTO_SRW)
2221                 ret = ZOOM_connection_srw_send_search(c);
2222             else
2223                 ret = ZOOM_connection_send_search(c);
2224             break;
2225         case ZOOM_TASK_RETRIEVE:
2226             if (c->proto == PROTO_SRW)
2227                 ret = ZOOM_connection_srw_send_search(c);
2228             else
2229                 ret = send_present (c);
2230             break;
2231         case ZOOM_TASK_CONNECT:
2232             ret = do_connect(c);
2233             break;
2234         case ZOOM_TASK_SCAN:
2235             ret = send_scan(c);
2236             break;
2237         case ZOOM_TASK_PACKAGE:
2238             ret = send_package(c);
2239             break;
2240         }
2241     }
2242     else
2243     {
2244         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2245         ZOOM_connection_remove_tasks (c);
2246     }
2247     if (ret == zoom_complete)
2248     {
2249         yaz_log (LOG_DEBUG, "task removed (complete)");
2250         ZOOM_connection_remove_task (c);
2251         return 0;
2252     }
2253     yaz_log (LOG_DEBUG, "task pending");
2254     return 1;
2255 }
2256
2257 static zoom_ret send_sort_present (ZOOM_connection c)
2258 {
2259     zoom_ret r = send_sort (c);
2260     if (r == zoom_complete)
2261         r = send_present (c);
2262     return r;
2263 }
2264
2265 static int es_response (ZOOM_connection c,
2266                         Z_ExtendedServicesResponse *res)
2267 {
2268     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2269         return 0;
2270     if (res->diagnostics && res->num_diagnostics > 0)
2271         response_diag(c, res->diagnostics[0]);
2272     if (res->taskPackage &&
2273         res->taskPackage->which == Z_External_extendedService)
2274     {
2275         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2276         Odr_oct *id = taskPackage->targetReference;
2277
2278         if (id)
2279             ZOOM_options_setl (c->tasks->u.package->options,
2280                                "targetReference", (char*) id->buf, id->len);
2281     }
2282     return 1;
2283 }
2284
2285
2286 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2287 {
2288     Z_InitResponse *initrs;
2289
2290     c->mask = 0;
2291     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2292     switch(apdu->which)
2293     {
2294     case Z_APDU_initResponse:
2295         initrs = apdu->u.initResponse;
2296         ZOOM_connection_option_set(c, "targetImplementationId",
2297                                    initrs->implementationId ?
2298                                    initrs->implementationId : "");
2299         ZOOM_connection_option_set(c, "targetImplementationName",
2300                                    initrs->implementationName ?
2301                                    initrs->implementationName : "");
2302         ZOOM_connection_option_set(c, "targetImplementationVersion",
2303                                    initrs->implementationVersion ?
2304                                    initrs->implementationVersion : "");
2305         if (!*initrs->result)
2306         {
2307             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2308         }
2309         else
2310         {
2311             char *cookie =
2312                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2313                                           VAL_COOKIE, 1, 0);
2314             xfree (c->cookie_in);
2315             c->cookie_in = 0;
2316             if (cookie)
2317                 c->cookie_in = xstrdup(cookie);
2318             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2319                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2320                 c->support_named_resultsets = 1;
2321             if (c->tasks)
2322             {
2323                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2324                 ZOOM_connection_remove_task (c);
2325             }
2326             ZOOM_connection_exec_task (c);
2327         }
2328         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2329         {
2330             NMEM tmpmem = nmem_create();
2331             Z_CharSetandLanguageNegotiation *p =
2332                 yaz_get_charneg_record(initrs->otherInfo);
2333
2334             if (p)
2335             {
2336                 char *charset=NULL, *lang=NULL;
2337                 int sel;
2338
2339                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2340                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2341                         "language %s, select %d",
2342                         charset ? charset : "none", lang ? lang : "none", sel);
2343                 if (charset)
2344                     ZOOM_connection_option_set (c, "negotiation-charset",
2345                                                 charset);
2346                 if (lang)
2347                     ZOOM_connection_option_set (c, "negotiation-lang",
2348                                                 lang);
2349                 nmem_destroy(tmpmem);
2350             }
2351         }
2352         break;
2353     case Z_APDU_searchResponse:
2354         handle_search_response (c, apdu->u.searchResponse);
2355         if (send_sort_present (c) == zoom_complete)
2356             ZOOM_connection_remove_task (c);
2357         break;
2358     case Z_APDU_presentResponse:
2359         handle_present_response (c, apdu->u.presentResponse);
2360         if (send_present (c) == zoom_complete)
2361             ZOOM_connection_remove_task (c);
2362         break;
2363     case Z_APDU_sortResponse:
2364         sort_response (c, apdu->u.sortResponse);
2365         if (send_present (c) == zoom_complete)
2366             ZOOM_connection_remove_task (c);
2367         break;
2368     case Z_APDU_scanResponse:
2369         scan_response (c, apdu->u.scanResponse);
2370         ZOOM_connection_remove_task (c);
2371         break;
2372     case Z_APDU_extendedServicesResponse:
2373         es_response (c, apdu->u.extendedServicesResponse);
2374         ZOOM_connection_remove_task (c);
2375         break;
2376     case Z_APDU_close:
2377         if (c->reconnect_ok)
2378         {
2379             do_close(c);
2380             c->tasks->running = 0;
2381             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2382         }
2383         else
2384         {
2385             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2386             do_close(c);
2387         }
2388         break;
2389     default:
2390         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2391         do_close(c);
2392     }
2393 }
2394
2395 #if HAVE_XML2
2396 static void handle_srw_response(ZOOM_connection c,
2397                                 Z_SRW_searchRetrieveResponse *res)
2398 {
2399     ZOOM_resultset resultset = 0;
2400     int i;
2401     NMEM nmem;
2402
2403     if (!c->tasks)
2404         return;
2405
2406     if (c->tasks->which == ZOOM_TASK_SEARCH)
2407         resultset = c->tasks->u.search.resultset;
2408     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2409         resultset = c->tasks->u.retrieve.resultset;
2410     else
2411         return ;
2412
2413     resultset->size = 0;
2414
2415     yaz_log(LOG_DEBUG, "got SRW response OK");
2416
2417     if (res->numberOfRecords)
2418         resultset->size = *res->numberOfRecords;
2419
2420     for (i = 0; i<res->num_records; i++)
2421     {
2422         int pos;
2423
2424         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2425             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2426
2427         if (res->records[i].recordPosition &&
2428             *res->records[i].recordPosition > 0)
2429             pos = *res->records[i].recordPosition - 1;
2430         else
2431             pos = resultset->start + i;
2432
2433         npr->databaseName = 0;
2434         npr->which = Z_NamePlusRecord_databaseRecord;
2435         npr->u.databaseRecord = (Z_External *)
2436             odr_malloc(c->odr_in, sizeof(Z_External));
2437         npr->u.databaseRecord->descriptor = 0;
2438         npr->u.databaseRecord->direct_reference =
2439             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2440         npr->u.databaseRecord->which = Z_External_octet;
2441         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2442             odr_malloc(c->odr_in, sizeof(Odr_oct));
2443         npr->u.databaseRecord->u.octet_aligned->buf =
2444             res->records[i].recordData_buf;
2445         npr->u.databaseRecord->u.octet_aligned->len =
2446             npr->u.databaseRecord->u.octet_aligned->size =
2447             res->records[i].recordData_len;
2448         record_cache_add (resultset, npr, pos);
2449     }
2450     if (res->num_diagnostics > 0)
2451     {
2452         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2453                        res->diagnostics[0].details, 0);
2454     }
2455     nmem = odr_extract_mem(c->odr_in);
2456     nmem_transfer(resultset->odr->mem, nmem);
2457     nmem_destroy(nmem);
2458 }
2459 #endif
2460
2461 #if HAVE_XML2
2462 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2463 {
2464     int ret = -1;
2465     const char *content_type = z_HTTP_header_lookup(hres->headers,
2466                                                     "Content-Type");
2467     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2468                                                        "Connection");
2469     c->mask = 0;
2470     yaz_log (LOG_DEBUG, "handle_http");
2471
2472     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2473     {
2474         Z_SOAP *soap_package = 0;
2475         ODR o = odr_createmem(ODR_DECODE);
2476         Z_SOAP_Handler soap_handlers[2] = {
2477             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2478              (Z_SOAP_fun) yaz_srw_codec},
2479             {0, 0, 0}
2480         };
2481         ret = z_soap_codec(o, &soap_package,
2482                            &hres->content_buf, &hres->content_len,
2483                            soap_handlers);
2484         if (!ret && soap_package->which == Z_SOAP_generic &&
2485             soap_package->u.generic->no == 0)
2486         {
2487             Z_SRW_searchRetrieve *sr = soap_package->u.generic->p;
2488             if (sr->which == Z_SRW_searchRetrieve_response)
2489                 handle_srw_response(c, sr->u.response);
2490             else
2491                 ret = -1;
2492         }
2493         else if (!ret && (soap_package->which == Z_SOAP_fault
2494                           || soap_package->which == Z_SOAP_error))
2495         {
2496             set_HTTP_error(c, hres->code,
2497                            soap_package->u.fault->fault_code,
2498                            soap_package->u.fault->fault_string);
2499         }
2500         else
2501             ret = -1;
2502         odr_destroy(o);
2503     }
2504     if (ret)
2505     {
2506         if (hres->code != 200)
2507             set_HTTP_error(c, hres->code, 0, 0);
2508         else
2509             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2510         do_close (c);
2511     }
2512     ZOOM_connection_remove_task(c);
2513     if (!strcmp(hres->version, "1.0"))
2514     {
2515         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2516         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2517             do_close(c);
2518     }
2519     else
2520     {
2521         /* HTTP 1.1: only if no close we stay alive .. */
2522         if (connection_head && !strcmp(connection_head, "close"))
2523             do_close(c);
2524     }
2525 }
2526 #endif
2527
2528 static int do_read (ZOOM_connection c)
2529 {
2530     int r;
2531     ZOOM_Event event;
2532
2533     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2534     ZOOM_connection_put_event (c, event);
2535
2536     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2537
2538     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2539     if (r == 1)
2540         return 0;
2541     if (r <= 0)
2542     {
2543         if (c->reconnect_ok)
2544         {
2545             do_close (c);
2546             c->reconnect_ok = 0;
2547             yaz_log (LOG_DEBUG, "reconnect read");
2548             c->tasks->running = 0;
2549             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2550         }
2551         else
2552         {
2553             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2554             do_close (c);
2555         }
2556     }
2557     else
2558     {
2559         Z_GDU *gdu;
2560         ZOOM_Event event;
2561         odr_reset (c->odr_in);
2562         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2563         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2564         ZOOM_connection_put_event (c, event);
2565
2566         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2567         {
2568             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2569             do_close (c);
2570         }
2571         else if (gdu->which == Z_GDU_Z3950)
2572             handle_apdu (c, gdu->u.z3950);
2573         else if (gdu->which == Z_GDU_HTTP_Response)
2574         {
2575 #if HAVE_XML2
2576             handle_http (c, gdu->u.HTTP_Response);
2577 #else
2578             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2579             do_close (c);
2580 #endif
2581         }
2582         c->reconnect_ok = 0;
2583     }
2584     return 1;
2585 }
2586
2587 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2588 {
2589     int r;
2590     ZOOM_Event event;
2591
2592     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2593     ZOOM_connection_put_event (c, event);
2594
2595     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2596     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2597     {
2598         if (c->reconnect_ok)
2599         {
2600             do_close (c);
2601             c->reconnect_ok = 0;
2602             yaz_log (LOG_DEBUG, "reconnect write");
2603             c->tasks->running = 0;
2604             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2605             return zoom_pending;
2606         }
2607         if (c->state == STATE_CONNECTING)
2608             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2609         else
2610             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2611         do_close (c);
2612         return zoom_complete;
2613     }
2614     else if (r == 1)
2615     {
2616         c->mask = ZOOM_SELECT_EXCEPT;
2617         if (c->cs->io_pending & CS_WANT_WRITE)
2618             c->mask += ZOOM_SELECT_WRITE;
2619         if (c->cs->io_pending & CS_WANT_READ)
2620             c->mask += ZOOM_SELECT_READ;
2621         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2622     }
2623     else
2624     {
2625         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2626         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2627     }
2628     return zoom_pending;
2629 }
2630
2631 static zoom_ret do_write(ZOOM_connection c)
2632 {
2633     return do_write_ex (c, c->buf_out, c->len_out);
2634 }
2635
2636
2637 ZOOM_API(const char *)
2638 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2639 {
2640     return ZOOM_options_get (c->options, key);
2641 }
2642
2643 ZOOM_API(void)
2644 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2645                                   const char *val)
2646 {
2647     ZOOM_options_set (c->options, key, val);
2648 }
2649
2650 ZOOM_API(const char *)
2651 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2652 {
2653     return ZOOM_options_get (r->options, key);
2654 }
2655
2656 ZOOM_API(void)
2657 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2658                                   const char *val)
2659 {
2660     ZOOM_options_set (r->options, key, val);
2661 }
2662
2663
2664 ZOOM_API(int)
2665 ZOOM_connection_errcode (ZOOM_connection c)
2666 {
2667     return ZOOM_connection_error (c, 0, 0);
2668 }
2669
2670 ZOOM_API(const char *)
2671 ZOOM_connection_errmsg (ZOOM_connection c)
2672 {
2673     const char *msg;
2674     ZOOM_connection_error (c, &msg, 0);
2675     return msg;
2676 }
2677
2678 ZOOM_API(const char *)
2679 ZOOM_connection_addinfo (ZOOM_connection c)
2680 {
2681     const char *addinfo;
2682     ZOOM_connection_error (c, 0, &addinfo);
2683     return addinfo;
2684 }
2685
2686 ZOOM_API(const char *)
2687 ZOOM_diag_str (int error)
2688 {
2689     switch (error)
2690     {
2691     case ZOOM_ERROR_NONE:
2692         return "No error";
2693     case ZOOM_ERROR_CONNECT:
2694         return "Connect failed";
2695     case ZOOM_ERROR_MEMORY:
2696         return "Out of memory";
2697     case ZOOM_ERROR_ENCODE:
2698         return "Encoding failed";
2699     case ZOOM_ERROR_DECODE:
2700         return "Decoding failed";
2701     case ZOOM_ERROR_CONNECTION_LOST:
2702         return "Connection lost";
2703     case ZOOM_ERROR_INIT:
2704         return "Init rejected";
2705     case ZOOM_ERROR_INTERNAL:
2706         return "Internal failure";
2707     case ZOOM_ERROR_TIMEOUT:
2708         return "Timeout";
2709     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2710         return "Unsupported protocol";
2711     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2712         return "Unsupported query type";
2713     default:
2714         return diagbib1_str (error);
2715     }
2716 }
2717
2718 ZOOM_API(int)
2719 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2720                          const char **addinfo, const char **diagset)
2721 {
2722     int error = c->error;
2723     if (cp)
2724     {
2725         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2726             *cp = ZOOM_diag_str(error);
2727         else if (!strcmp(c->diagset, "HTTP"))
2728             *cp = z_HTTP_errmsg(c->error);
2729         else if (!strcmp(c->diagset, "Bib-1"))
2730             *cp = ZOOM_diag_str(error);
2731         else if (!strcmp(c->diagset, "SRW"))
2732             *cp = yaz_diag_srw_str(c->error);
2733         else
2734             *cp = "Unknown error and diagnostic set";
2735     }
2736     if (addinfo)
2737         *addinfo = c->addinfo ? c->addinfo : "";
2738     if (diagset)
2739         *diagset = c->diagset ? c->diagset : "";
2740     return c->error;
2741 }
2742
2743 ZOOM_API(int)
2744 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2745                        const char **addinfo)
2746 {
2747     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2748 }
2749
2750 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2751 {
2752     ZOOM_Event event = 0;
2753     int r = cs_look(c->cs);
2754     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2755              c, mask, r);
2756
2757     if (r == CS_NONE)
2758     {
2759         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2760         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2761         do_close (c);
2762         ZOOM_connection_put_event (c, event);
2763     }
2764     else if (r == CS_CONNECT)
2765     {
2766         int ret;
2767         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2768
2769         ret = cs_rcvconnect (c->cs);
2770         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2771         if (ret == 1)
2772         {
2773             c->mask = ZOOM_SELECT_EXCEPT;
2774             if (c->cs->io_pending & CS_WANT_WRITE)
2775                 c->mask += ZOOM_SELECT_WRITE;
2776             if (c->cs->io_pending & CS_WANT_READ)
2777                 c->mask += ZOOM_SELECT_READ;
2778             ZOOM_connection_put_event (c, event);
2779         }
2780         else if (ret == 0)
2781         {
2782             ZOOM_connection_put_event (c, event);
2783             if (c->proto == PROTO_Z3950)
2784                 ZOOM_connection_send_init(c);
2785             else
2786             {
2787                 /* no init request for SRW .. */
2788                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2789                 ZOOM_connection_remove_task (c);
2790                 c->mask = 0;
2791                 ZOOM_connection_exec_task (c);
2792             }
2793             c->state = STATE_ESTABLISHED;
2794         }
2795         else
2796         {
2797             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2798             do_close (c);
2799             ZOOM_connection_put_event (c, event);
2800         }
2801     }
2802     else
2803     {
2804         if (mask & ZOOM_SELECT_READ)
2805             do_read (c);
2806         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2807             do_write (c);
2808     }
2809     return 1;
2810 }
2811
2812 ZOOM_API(int)
2813 ZOOM_connection_last_event(ZOOM_connection cs)
2814 {
2815     if (!cs)
2816         return ZOOM_EVENT_NONE;
2817     return cs->last_event;
2818 }
2819
2820 ZOOM_API(int)
2821 ZOOM_event (int no, ZOOM_connection *cs)
2822 {
2823     int timeout = 5000;
2824 #if HAVE_SYS_POLL_H
2825     struct pollfd pollfds[1024];
2826     ZOOM_connection poll_cs[1024];
2827 #else
2828     struct timeval tv;
2829     fd_set input, output, except;
2830 #endif
2831     int i, r, nfds;
2832     int max_fd = 0;
2833
2834     for (i = 0; i<no; i++)
2835     {
2836         ZOOM_connection c = cs[i];
2837         ZOOM_Event event;
2838         if (c && (event = ZOOM_connection_get_event(c)))
2839         {
2840             ZOOM_Event_destroy (event);
2841             return i+1;
2842         }
2843     }
2844     for (i = 0; i<no; i++)
2845     {
2846         ZOOM_connection c = cs[i];
2847         ZOOM_Event event;
2848         if (c && ZOOM_connection_exec_task (c))
2849         {
2850             if ((event = ZOOM_connection_get_event(c)))
2851             {
2852                 ZOOM_Event_destroy (event);
2853                 return i+1;
2854             }
2855         }
2856     }
2857 #if HAVE_SYS_POLL_H
2858
2859 #else
2860     FD_ZERO (&input);
2861     FD_ZERO (&output);
2862     FD_ZERO (&except);
2863 #endif
2864     nfds = 0;
2865     for (i = 0; i<no; i++)
2866     {
2867         ZOOM_connection c = cs[i];
2868         int fd, mask;
2869         int this_timeout;
2870
2871         if (!c)
2872             continue;
2873         fd = z3950_connection_socket(c);
2874         mask = z3950_connection_mask(c);
2875
2876         if (fd == -1)
2877             continue;
2878         if (max_fd < fd)
2879             max_fd = fd;
2880
2881         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2882         if (this_timeout != -1 && this_timeout < timeout)
2883             timeout = this_timeout;
2884 #if HAVE_SYS_POLL_H
2885         if (mask)
2886         {
2887             short poll_events = 0;
2888
2889             if (mask & ZOOM_SELECT_READ)
2890                 poll_events += POLLIN;
2891             if (mask & ZOOM_SELECT_WRITE)
2892                 poll_events += POLLOUT;
2893             if (mask & ZOOM_SELECT_EXCEPT)
2894                 poll_events += POLLERR;
2895             pollfds[nfds].fd = fd;
2896             pollfds[nfds].events = poll_events;
2897             pollfds[nfds].revents = 0;
2898             poll_cs[nfds] = c;
2899             nfds++;
2900         }
2901 #else
2902         if (mask & ZOOM_SELECT_READ)
2903         {
2904             FD_SET (fd, &input);
2905             nfds++;
2906         }
2907         if (mask & ZOOM_SELECT_WRITE)
2908         {
2909             FD_SET (fd, &output);
2910             nfds++;
2911         }
2912         if (mask & ZOOM_SELECT_EXCEPT)
2913         {
2914             FD_SET (fd, &except);
2915             nfds++;
2916         }
2917 #endif
2918     }
2919     if (timeout >= 5000)
2920         timeout = 30;
2921
2922     if (!nfds)
2923         return 0;
2924
2925 #if HAVE_SYS_POLL_H
2926     r = poll (pollfds, nfds, timeout * 1000);
2927     for (i = 0; i<nfds; i++)
2928     {
2929         ZOOM_connection c = poll_cs[i];
2930         if (r && c->mask)
2931         {
2932             int mask = 0;
2933             if (pollfds[i].revents & POLLIN)
2934                 mask += ZOOM_SELECT_READ;
2935             if (pollfds[i].revents & POLLOUT)
2936                 mask += ZOOM_SELECT_WRITE;
2937             if (pollfds[i].revents & POLLERR)
2938                 mask += ZOOM_SELECT_EXCEPT;
2939             if (mask)
2940                 ZOOM_connection_do_io(c, mask);
2941         }
2942         else if (r == 0 && c->mask)
2943         {
2944             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2945             /* timeout and this connection was waiting */
2946             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2947             do_close (c);
2948             ZOOM_connection_put_event(c, event);
2949         }
2950     }
2951 #else
2952     tv.tv_sec = timeout;
2953     tv.tv_usec = 0;
2954     yaz_log (LOG_DEBUG, "select start");
2955     r = select (max_fd+1, &input, &output, &except, &tv);
2956     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2957     for (i = 0; i<no; i++)
2958     {
2959         ZOOM_connection c = cs[i];
2960         int fd, mask;
2961
2962         if (!c)
2963             continue;
2964         fd = z3950_connection_socket(c);
2965         mask = 0;
2966         if (r && c->mask)
2967         {
2968             /* no timeout and real socket */
2969             if (FD_ISSET(fd, &input))
2970                 mask += ZOOM_SELECT_READ;
2971             if (FD_ISSET(fd, &output))
2972                 mask += ZOOM_SELECT_WRITE;
2973             if (FD_ISSET(fd, &except))
2974                 mask += ZOOM_SELECT_EXCEPT;
2975             if (mask)
2976                 ZOOM_connection_do_io(c, mask);
2977         }
2978         if (r == 0 && c->mask)
2979         {
2980             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2981             /* timeout and this connection was waiting */
2982             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2983             do_close (c);
2984             yaz_log (LOG_DEBUG, "timeout");
2985             ZOOM_connection_put_event(c, event);
2986         }
2987     }
2988 #endif
2989     for (i = 0; i<no; i++)
2990     {
2991         ZOOM_connection c = cs[i];
2992         ZOOM_Event event;
2993         if (c && (event = ZOOM_connection_get_event(c)))
2994         {
2995             ZOOM_Event_destroy (event);
2996             return i+1;
2997         }
2998     }
2999     return 0;
3000 }