src/zoom-c.c

   1 /*
   2  * Copyright (C) 1995-2007, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: zoom-c.c,v 1.116 2007-03-12 08:27:44 adam Exp $
   6  */
   7 /**
   8  * \file zoom-c.c
   9  * \brief Implements ZOOM C interface.
  10  */
  11
  12 #include <assert.h>
  13 #include <string.h>
  14 #include <errno.h>
  15 #include "zoom-p.h"
  16
  17 #include <yaz/yaz-util.h>
  18 #include <yaz/xmalloc.h>
  19 #include <yaz/otherinfo.h>
  20 #include <yaz/log.h>
  21 #include <yaz/pquery.h>
  22 #include <yaz/marcdisp.h>
  23 #include <yaz/diagbib1.h>
  24 #include <yaz/charneg.h>
  25 #include <yaz/ill.h>
  26 #include <yaz/srw.h>
  27 #include <yaz/cql.h>
  28 #include <yaz/ccl.h>
  29
  30 #define TASK_FIX 1
  31
  32 static int log_api = 0;
  33 static int log_details = 0;
  34
  35 typedef enum {
  36     zoom_pending,
  37     zoom_complete
  38 } zoom_ret;
  39
  40 static void resultset_destroy(ZOOM_resultset r);
  41 static zoom_ret ZOOM_connection_send_init(ZOOM_connection c);
  42 static zoom_ret do_write_ex(ZOOM_connection c, char *buf_out, int len_out);
  43 static char *cql2pqf(ZOOM_connection c, const char *cql);
  44
  45
  46 /*
  47  * This wrapper is just for logging failed lookups.  It would be nicer
  48  * if it could cause failure when a lookup fails, but that's hard.
  49  */
  50 static Odr_oid *zoom_yaz_str_to_z3950oid(ZOOM_connection c,
  51                                          int oid_class, const char *str) {
  52     Odr_oid *res = yaz_str_to_z3950oid(c->odr_out, oid_class, str);
  53     if (res == 0)
  54         yaz_log(YLOG_WARN, "%p OID lookup (%d, '%s') failed",
  55                 c, (int) oid_class, str);
  56     return res;
  57 }
  58
  59
  60 static void initlog(void)
  61 {
  62     static int log_level_initialized = 0;
  63     if (!log_level_initialized)
  64     {
  65         log_api = yaz_log_module_level("zoom");
  66         log_details = yaz_log_module_level("zoomdetails");
  67         log_level_initialized = 1;
  68     }
  69 }
  70
  71 static ZOOM_Event ZOOM_Event_create(int kind)
  72 {
  73     ZOOM_Event event = (ZOOM_Event) xmalloc(sizeof(*event));
  74     event->kind = kind;
  75     event->next = 0;
  76     event->prev = 0;
  77     yaz_log(log_details, "ZOOM_Event_create(kind=%d)", kind);
  78     return event;
  79 }
  80
  81 static void ZOOM_Event_destroy(ZOOM_Event event)
  82 {
  83     xfree(event);
  84 }
  85
  86 static void ZOOM_connection_put_event(ZOOM_connection c, ZOOM_Event event)
  87 {
  88     if (c->m_queue_back)
  89     {
  90         c->m_queue_back->prev = event;
  91         assert(c->m_queue_front);
  92     }
  93     else
  94     {
  95         assert(!c->m_queue_front);
  96         c->m_queue_front = event;
  97     }
  98     event->next = c->m_queue_back;
  99     event->prev = 0;
 100     c->m_queue_back = event;
 101 }
 102
 103 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
 104 {
 105     ZOOM_Event event = c->m_queue_front;
 106     if (!event)
 107     {
 108         c->last_event = ZOOM_EVENT_NONE;
 109         return 0;
 110     }
 111     assert(c->m_queue_back);
 112     c->m_queue_front = event->prev;
 113     if (c->m_queue_front)
 114     {
 115         assert(c->m_queue_back);
 116         c->m_queue_front->next = 0;
 117     }
 118     else
 119         c->m_queue_back = 0;
 120     c->last_event = event->kind;
 121     return event;
 122 }
 123
 124 static void ZOOM_connection_remove_events(ZOOM_connection c)
 125 {
 126     ZOOM_Event event;
 127     while ((event = ZOOM_connection_get_event(c)))
 128         ZOOM_Event_destroy(event);
 129 }
 130
 131 ZOOM_API(int) ZOOM_connection_peek_event(ZOOM_connection c)
 132 {
 133     ZOOM_Event event = c->m_queue_front;
 134
 135     return event ? event->kind : ZOOM_EVENT_NONE;
 136 }
 137
 138 void ZOOM_connection_remove_tasks(ZOOM_connection c);
 139
 140 static void set_dset_error(ZOOM_connection c, int error,
 141                            const char *dset,
 142                            const char *addinfo, const char *addinfo2)
 143 {
 144     char *cp;
 145
 146     xfree(c->addinfo);
 147     c->addinfo = 0;
 148     c->error = error;
 149     if (!c->diagset || strcmp(dset, c->diagset))
 150     {
 151         xfree(c->diagset);
 152         c->diagset = xstrdup(dset);
 153         /* remove integer part from SRW diagset .. */
 154         if ((cp = strrchr(c->diagset, '/')))
 155             *cp = '\0';
 156     }
 157     if (addinfo && addinfo2)
 158     {
 159         c->addinfo = (char*) xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
 160         strcpy(c->addinfo, addinfo);
 161         strcat(c->addinfo, addinfo2);
 162     }
 163     else if (addinfo)
 164         c->addinfo = xstrdup(addinfo);
 165     if (error != ZOOM_ERROR_NONE)
 166     {
 167         yaz_log(log_api, "%p set_dset_error %s %s:%d %s %s",
 168                 c, c->host_port ? c->host_port : "<>", dset, error,
 169                 addinfo ? addinfo : "",
 170                 addinfo2 ? addinfo2 : "");
 171 #if TASK_FIX
 172         ZOOM_connection_remove_tasks(c);
 173 #endif
 174     }
 175 }
 176
 177 #if YAZ_HAVE_XML2
 178 static void set_HTTP_error(ZOOM_connection c, int error,
 179                            const char *addinfo, const char *addinfo2)
 180 {
 181     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 182 }
 183 #endif
 184
 185
 186 static void set_ZOOM_error(ZOOM_connection c, int error,
 187                            const char *addinfo)
 188 {
 189     set_dset_error(c, error, "ZOOM", addinfo, 0);
 190 }
 191
 192 static void clear_error(ZOOM_connection c)
 193 {
 194     /*
 195      * If an error is tied to an operation then it's ok to clear: for
 196      * example, a diagnostic returned from a search is cleared by a
 197      * subsequent search.  However, problems such as Connection Lost
 198      * or Init Refused are not cleared, because they are not
 199      * recoverable: doing another search doesn't help.
 200      */
 201
 202     ZOOM_connection_remove_events(c);
 203     switch (c->error)
 204     {
 205     case ZOOM_ERROR_CONNECT:
 206     case ZOOM_ERROR_MEMORY:
 207     case ZOOM_ERROR_DECODE:
 208     case ZOOM_ERROR_CONNECTION_LOST:
 209     case ZOOM_ERROR_INIT:
 210     case ZOOM_ERROR_INTERNAL:
 211     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 212         break;
 213     default:
 214         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 215     }
 216 }
 217
 218 void ZOOM_connection_show_task(ZOOM_task task)
 219 {
 220     switch(task->which)
 221     {
 222     case ZOOM_TASK_SEARCH:
 223         yaz_log(YLOG_LOG, "search p=%p", task);
 224         break;
 225     case ZOOM_TASK_RETRIEVE:
 226         yaz_log(YLOG_LOG, "retrieve p=%p", task);
 227         break;
 228     case ZOOM_TASK_CONNECT:
 229         yaz_log(YLOG_LOG, "connect p=%p", task);
 230         break;
 231     case ZOOM_TASK_SCAN:
 232         yaz_log(YLOG_LOG, "scant p=%p", task);
 233         break;
 234     }
 235 }
 236
 237 void ZOOM_connection_show_tasks(ZOOM_connection c)
 238 {
 239     ZOOM_task task;
 240     yaz_log(YLOG_LOG, "connection p=%p tasks", c);
 241     for (task = c->tasks; task; task = task->next)
 242         ZOOM_connection_show_task(task);
 243 }
 244
 245 ZOOM_task ZOOM_connection_add_task(ZOOM_connection c, int which)
 246 {
 247     ZOOM_task *taskp = &c->tasks;
 248     while (*taskp)
 249         taskp = &(*taskp)->next;
 250     *taskp = (ZOOM_task) xmalloc(sizeof(**taskp));
 251     (*taskp)->running = 0;
 252     (*taskp)->which = which;
 253     (*taskp)->next = 0;
 254     clear_error(c);
 255     return *taskp;
 256 }
 257
 258 ZOOM_API(int) ZOOM_connection_is_idle(ZOOM_connection c)
 259 {
 260     return c->tasks ? 0 : 1;
 261 }
 262
 263 ZOOM_task ZOOM_connection_insert_task(ZOOM_connection c, int which)
 264 {
 265     ZOOM_task task = (ZOOM_task) xmalloc(sizeof(*task));
 266
 267     task->next = c->tasks;
 268     c->tasks = task;
 269
 270     task->running = 0;
 271     task->which = which;
 272     clear_error(c);
 273     return task;
 274 }
 275
 276 void ZOOM_connection_remove_task(ZOOM_connection c)
 277 {
 278     ZOOM_task task = c->tasks;
 279
 280     if (task)
 281     {
 282         c->tasks = task->next;
 283         switch (task->which)
 284         {
 285         case ZOOM_TASK_SEARCH:
 286             resultset_destroy(task->u.search.resultset);
 287             xfree(task->u.search.syntax);
 288             xfree(task->u.search.elementSetName);
 289             break;
 290         case ZOOM_TASK_RETRIEVE:
 291             resultset_destroy(task->u.retrieve.resultset);
 292             xfree(task->u.retrieve.syntax);
 293             xfree(task->u.retrieve.elementSetName);
 294             break;
 295         case ZOOM_TASK_CONNECT:
 296             break;
 297         case ZOOM_TASK_SCAN:
 298             ZOOM_scanset_destroy(task->u.scan.scan);
 299             break;
 300         case ZOOM_TASK_PACKAGE:
 301             ZOOM_package_destroy(task->u.package);
 302             break;
 303         case ZOOM_TASK_SORT:
 304             resultset_destroy(task->u.sort.resultset);
 305             ZOOM_query_destroy(task->u.sort.q);
 306             break;
 307         default:
 308             assert(0);
 309         }
 310         xfree(task);
 311
 312         if (!c->tasks)
 313         {
 314             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_END);
 315             ZOOM_connection_put_event(c, event);
 316         }
 317     }
 318 }
 319
 320 static int ZOOM_connection_exec_task(ZOOM_connection c);
 321
 322 void ZOOM_connection_remove_tasks(ZOOM_connection c)
 323 {
 324     while (c->tasks)
 325         ZOOM_connection_remove_task(c);
 326 }
 327
 328 static ZOOM_record record_cache_lookup(ZOOM_resultset r, int pos,
 329                                        const char *syntax,
 330                                        const char *elementSetName);
 331
 332 ZOOM_API(ZOOM_connection)
 333     ZOOM_connection_create(ZOOM_options options)
 334 {
 335     ZOOM_connection c = (ZOOM_connection) xmalloc(sizeof(*c));
 336
 337     initlog();
 338
 339     yaz_log(log_api, "%p ZOOM_connection_create", c);
 340
 341     c->proto = PROTO_Z3950;
 342     c->cs = 0;
 343     ZOOM_connection_set_mask(c, 0);
 344     c->reconnect_ok = 0;
 345     c->state = STATE_IDLE;
 346     c->addinfo = 0;
 347     c->diagset = 0;
 348     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 349     c->buf_in = 0;
 350     c->len_in = 0;
 351     c->buf_out = 0;
 352     c->len_out = 0;
 353     c->resultsets = 0;
 354
 355     c->options = ZOOM_options_create_with_parent(options);
 356
 357     c->host_port = 0;
 358     c->path = 0;
 359     c->proxy = 0;
 360
 361     c->charset = c->lang = 0;
 362
 363     c->cookie_out = 0;
 364     c->cookie_in = 0;
 365     c->client_IP = 0;
 366     c->tasks = 0;
 367
 368     c->odr_in = odr_createmem(ODR_DECODE);
 369     c->odr_out = odr_createmem(ODR_ENCODE);
 370
 371     c->async = 0;
 372     c->support_named_resultsets = 0;
 373     c->last_event = ZOOM_EVENT_NONE;
 374
 375     c->m_queue_front = 0;
 376     c->m_queue_back = 0;
 377     return c;
 378 }
 379
 380
 381 /* set database names. Take local databases (if set); otherwise
 382    take databases given in ZURL (if set); otherwise use Default */
 383 static char **set_DatabaseNames(ZOOM_connection con, ZOOM_options options,
 384                                 int *num, ODR odr)
 385 {
 386     char **databaseNames;
 387     const char *cp = ZOOM_options_get(options, "databaseName");
 388
 389     if ((!cp || !*cp) && con->host_port)
 390     {
 391         if (strncmp(con->host_port, "unix:", 5) == 0)
 392             cp = strchr(con->host_port+5, ':');
 393         else
 394             cp = strchr(con->host_port, '/');
 395         if (cp)
 396             cp++;
 397     }
 398     if (!cp)
 399         cp = "Default";
 400     nmem_strsplit(odr->mem, "+", cp,  &databaseNames, num);
 401     return databaseNames;
 402 }
 403
 404 ZOOM_API(ZOOM_connection)
 405     ZOOM_connection_new(const char *host, int portnum)
 406 {
 407     ZOOM_connection c = ZOOM_connection_create(0);
 408
 409     ZOOM_connection_connect(c, host, portnum);
 410     return c;
 411 }
 412
 413 static zoom_sru_mode get_sru_mode_from_string(const char *s)
 414 {
 415     if (!s || !*s)
 416         return zoom_sru_soap;
 417     if (!yaz_matchstr(s, "soap"))
 418         return zoom_sru_soap;
 419     else if (!yaz_matchstr(s, "get"))
 420         return zoom_sru_get;
 421     else if (!yaz_matchstr(s, "post"))
 422         return zoom_sru_post;
 423     return zoom_sru_error;
 424 }
 425
 426 ZOOM_API(void)
 427     ZOOM_connection_connect(ZOOM_connection c,
 428                             const char *host, int portnum)
 429 {
 430     const char *val;
 431     ZOOM_task task;
 432
 433     initlog();
 434
 435     yaz_log(log_api, "%p ZOOM_connection_connect host=%s portnum=%d",
 436             c, host ? host : "null", portnum);
 437
 438     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 439     ZOOM_connection_remove_tasks(c);
 440
 441     if (c->cs)
 442     {
 443         yaz_log(log_details, "%p ZOOM_connection_connect reconnect ok", c);
 444         c->reconnect_ok = 1;
 445         return;
 446     }
 447     yaz_log(log_details, "%p ZOOM_connection_connect connect", c);
 448     xfree(c->proxy);
 449     val = ZOOM_options_get(c->options, "proxy");
 450     if (val && *val)
 451     {
 452         yaz_log(log_details, "%p ZOOM_connection_connect proxy=%s", c, val);
 453         c->proxy = xstrdup(val);
 454     }
 455     else
 456         c->proxy = 0;
 457
 458     xfree(c->charset);
 459     val = ZOOM_options_get(c->options, "charset");
 460     if (val && *val)
 461     {
 462         yaz_log(log_details, "%p ZOOM_connection_connect charset=%s", c, val);
 463         c->charset = xstrdup(val);
 464     }
 465     else
 466         c->charset = 0;
 467
 468     xfree(c->lang);
 469     val = ZOOM_options_get(c->options, "lang");
 470     if (val && *val)
 471     {
 472         yaz_log(log_details, "%p ZOOM_connection_connect lang=%s", c, val);
 473         c->lang = xstrdup(val);
 474     }
 475     else
 476         c->lang = 0;
 477
 478     if (host)
 479     {
 480         xfree(c->host_port);
 481         if (portnum)
 482         {
 483             char hostn[128];
 484             sprintf(hostn, "%.80s:%d", host, portnum);
 485             c->host_port = xstrdup(hostn);
 486         }
 487         else
 488             c->host_port = xstrdup(host);
 489     }
 490
 491     {
 492         /*
 493          * If the "<scheme>:" part of the host string is preceded by one
 494          * or more comma-separated <name>=<value> pairs, these are taken
 495          * to be options to be set on the connection object.  Among other
 496          * applications, this facility can be used to embed authentication
 497          * in a host string:
 498          *          user=admin,password=secret,tcp:localhost:9999
 499          */
 500         char *remainder = c->host_port;
 501         char *pcolon = strchr(remainder, ':');
 502         char *pcomma;
 503         char *pequals;
 504         while ((pcomma = strchr(remainder, ',')) != 0 &&
 505                (pcolon == 0 || pcomma < pcolon)) {
 506             *pcomma = '\0';
 507             if ((pequals = strchr(remainder, '=')) != 0) {
 508                 *pequals = '\0';
 509                 /*printf("# setting '%s'='%s'\n", remainder, pequals+1);*/
 510                 ZOOM_connection_option_set(c, remainder, pequals+1);
 511             }
 512             remainder = pcomma+1;
 513         }
 514
 515         if (remainder != c->host_port) {
 516             xfree(c->host_port);
 517             c->host_port = xstrdup(remainder);
 518             /*printf("# reset hp='%s'\n", remainder);*/
 519         }
 520     }
 521
 522     val = ZOOM_options_get(c->options, "sru");
 523     c->sru_mode = get_sru_mode_from_string(val);
 524
 525     ZOOM_options_set(c->options, "host", c->host_port);
 526
 527     val = ZOOM_options_get(c->options, "cookie");
 528     if (val && *val)
 529     {
 530         yaz_log(log_details, "%p ZOOM_connection_connect cookie=%s", c, val);
 531         c->cookie_out = xstrdup(val);
 532     }
 533
 534     val = ZOOM_options_get(c->options, "clientIP");
 535     if (val && *val)
 536     {
 537         yaz_log(log_details, "%p ZOOM_connection_connect clientIP=%s",
 538                 c, val);
 539         c->client_IP = xstrdup(val);
 540     }
 541
 542     c->async = ZOOM_options_get_bool(c->options, "async", 0);
 543     yaz_log(log_details, "%p ZOOM_connection_connect async=%d", c, c->async);
 544
 545     task = ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 546
 547     if (!c->async)
 548     {
 549         while (ZOOM_event(1, &c))
 550             ;
 551     }
 552 }
 553
 554 ZOOM_API(ZOOM_query)
 555     ZOOM_query_create(void)
 556 {
 557     ZOOM_query s = (ZOOM_query) xmalloc(sizeof(*s));
 558
 559     yaz_log(log_details, "%p ZOOM_query_create", s);
 560     s->refcount = 1;
 561     s->z_query = 0;
 562     s->sort_spec = 0;
 563     s->odr = odr_createmem(ODR_ENCODE);
 564     s->query_string = 0;
 565
 566     return s;
 567 }
 568
 569 ZOOM_API(void)
 570     ZOOM_query_destroy(ZOOM_query s)
 571 {
 572     if (!s)
 573         return;
 574
 575     (s->refcount)--;
 576     yaz_log(log_details, "%p ZOOM_query_destroy count=%d", s, s->refcount);
 577     if (s->refcount == 0)
 578     {
 579         odr_destroy(s->odr);
 580         xfree(s);
 581     }
 582 }
 583
 584 ZOOM_API(int)
 585     ZOOM_query_prefix(ZOOM_query s, const char *str)
 586 {
 587     s->query_string = odr_strdup(s->odr, str);
 588     s->z_query = (Z_Query *) odr_malloc(s->odr, sizeof(*s->z_query));
 589     s->z_query->which = Z_Query_type_1;
 590     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 591     if (!s->z_query->u.type_1)
 592     {
 593         yaz_log(log_details, "%p ZOOM_query_prefix str=%s failed", s, str);
 594         s->z_query = 0;
 595         return -1;
 596     }
 597     yaz_log(log_details, "%p ZOOM_query_prefix str=%s", s, str);
 598     return 0;
 599 }
 600
 601 ZOOM_API(int)
 602     ZOOM_query_cql(ZOOM_query s, const char *str)
 603 {
 604     Z_External *ext;
 605
 606     s->query_string = odr_strdup(s->odr, str);
 607
 608     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 609     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 610     ext->indirect_reference = 0;
 611     ext->descriptor = 0;
 612     ext->which = Z_External_CQL;
 613     ext->u.cql = s->query_string;
 614
 615     s->z_query = (Z_Query *) odr_malloc(s->odr, sizeof(*s->z_query));
 616     s->z_query->which = Z_Query_type_104;
 617     s->z_query->u.type_104 =  ext;
 618
 619     yaz_log(log_details, "%p ZOOM_query_cql str=%s", s, str);
 620
 621     return 0;
 622 }
 623
 624 /*
 625  * Translate the CQL string client-side into RPN which is passed to
 626  * the server.  This is useful for server's that don't themselves
 627  * support CQL, for which ZOOM_query_cql() is useless.  `conn' is used
 628  * only as a place to stash diagnostics if compilation fails; if this
 629  * information is not needed, a null pointer may be used.
 630  */
 631 ZOOM_API(int)
 632     ZOOM_query_cql2rpn(ZOOM_query s, const char *str, ZOOM_connection conn)
 633 {
 634     char *rpn;
 635     int ret;
 636     ZOOM_connection freeme = 0;
 637
 638     yaz_log(log_details, "%p ZOOM_query_cql2rpn str=%s conn=%p", s, str, conn);
 639     if (conn == 0)
 640         conn = freeme = ZOOM_connection_create(0);
 641
 642     rpn = cql2pqf(conn, str);
 643     if (freeme != 0)
 644         ZOOM_connection_destroy(freeme);
 645     if (rpn == 0)
 646         return -1;
 647
 648     ret = ZOOM_query_prefix(s, rpn);
 649     xfree(rpn);
 650     return ret;
 651 }
 652
 653 /*
 654  * Analogous in every way to ZOOM_query_cql2rpn(), except that there
 655  * is no analogous ZOOM_query_ccl() that just sends uninterpreted CCL
 656  * to the server, as the YAZ GFS doesn't know how to handle this.
 657  */
 658 ZOOM_API(int)
 659     ZOOM_query_ccl2rpn(ZOOM_query s, const char *str, const char *config,
 660                        int *ccl_error, const char **error_string,
 661                        int *error_pos)
 662 {
 663     int ret;
 664     struct ccl_rpn_node *rpn;
 665     CCL_bibset bibset = ccl_qual_mk();
 666
 667     if (config)
 668         ccl_qual_buf(bibset, config);
 669
 670     rpn = ccl_find_str(bibset, str, ccl_error, error_pos);
 671     if (!rpn)
 672     {
 673         *error_string = ccl_err_msg(*ccl_error);
 674         ret = -1;
 675     }
 676     else
 677     {
 678         WRBUF wr = wrbuf_alloc();
 679         ccl_pquery(wr, rpn);
 680         ccl_rpn_delete(rpn);
 681         ret = ZOOM_query_prefix(s, wrbuf_buf(wr));
 682         wrbuf_free(wr, 1);
 683     }
 684     ccl_qual_rm(&bibset);
 685     return ret;
 686 }
 687
 688 ZOOM_API(int)
 689     ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 690 {
 691     s->sort_spec = yaz_sort_spec(s->odr, criteria);
 692     if (!s->sort_spec)
 693     {
 694         yaz_log(log_details, "%p ZOOM_query_sortby criteria=%s failed",
 695                 s, criteria);
 696         return -1;
 697     }
 698     yaz_log(log_details, "%p ZOOM_query_sortby criteria=%s", s, criteria);
 699     return 0;
 700 }
 701
 702 static zoom_ret do_write(ZOOM_connection c);
 703
 704 ZOOM_API(void)
 705     ZOOM_connection_destroy(ZOOM_connection c)
 706 {
 707     ZOOM_resultset r;
 708     if (!c)
 709         return;
 710     yaz_log(log_api, "%p ZOOM_connection_destroy", c);
 711     if (c->cs)
 712         cs_close(c->cs);
 713     for (r = c->resultsets; r; r = r->next)
 714         r->connection = 0;
 715
 716     xfree(c->buf_in);
 717     xfree(c->addinfo);
 718     xfree(c->diagset);
 719     odr_destroy(c->odr_in);
 720     odr_destroy(c->odr_out);
 721     ZOOM_options_destroy(c->options);
 722     ZOOM_connection_remove_tasks(c);
 723     ZOOM_connection_remove_events(c);
 724     xfree(c->host_port);
 725     xfree(c->path);
 726     xfree(c->proxy);
 727     xfree(c->charset);
 728     xfree(c->lang);
 729     xfree(c->cookie_out);
 730     xfree(c->cookie_in);
 731     xfree(c->client_IP);
 732     xfree(c);
 733 }
 734
 735 void ZOOM_resultset_addref(ZOOM_resultset r)
 736 {
 737     if (r)
 738     {
 739         (r->refcount)++;
 740         yaz_log(log_details, "%p ZOOM_resultset_addref count=%d",
 741                 r, r->refcount);
 742     }
 743 }
 744
 745 ZOOM_resultset ZOOM_resultset_create(void)
 746 {
 747     int i;
 748     ZOOM_resultset r = (ZOOM_resultset) xmalloc(sizeof(*r));
 749
 750     initlog();
 751
 752     yaz_log(log_details, "%p ZOOM_resultset_create", r);
 753     r->refcount = 1;
 754     r->size = 0;
 755     r->odr = odr_createmem(ODR_ENCODE);
 756     r->piggyback = 1;
 757     r->setname = 0;
 758     r->schema = 0;
 759     r->step = 0;
 760     for (i = 0; i<RECORD_HASH_SIZE; i++)
 761         r->record_hash[i] = 0;
 762     r->r_sort_spec = 0;
 763     r->query = 0;
 764     r->connection = 0;
 765     r->next = 0;
 766     r->databaseNames = 0;
 767     r->num_databaseNames = 0;
 768     return r;
 769 }
 770
 771 ZOOM_API(ZOOM_resultset)
 772     ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 773 {
 774     ZOOM_resultset r;
 775     ZOOM_query s = ZOOM_query_create();
 776
 777     ZOOM_query_prefix(s, q);
 778
 779     r = ZOOM_connection_search(c, s);
 780     ZOOM_query_destroy(s);
 781     return r;
 782 }
 783
 784 ZOOM_API(ZOOM_resultset)
 785     ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 786 {
 787     ZOOM_resultset r = ZOOM_resultset_create();
 788     ZOOM_task task;
 789     const char *cp;
 790     int start, count;
 791     const char *syntax, *elementSetName;
 792
 793     yaz_log(log_api, "%p ZOOM_connection_search set %p query %p", c, r, q);
 794     r->r_sort_spec = q->sort_spec;
 795     r->query = q;
 796
 797     r->options = ZOOM_options_create_with_parent(c->options);
 798
 799     start = ZOOM_options_get_int(r->options, "start", 0);
 800     count = ZOOM_options_get_int(r->options, "count", 0);
 801     {
 802         /* If "presentChunk" is defined use that; otherwise "step" */
 803         const char *cp = ZOOM_options_get(r->options, "presentChunk");
 804         r->step = ZOOM_options_get_int(r->options,
 805                                        (cp != 0 ? "presentChunk": "step"), 0);
 806     }
 807     r->piggyback = ZOOM_options_get_bool(r->options, "piggyback", 1);
 808     cp = ZOOM_options_get(r->options, "setname");
 809     if (cp)
 810         r->setname = xstrdup(cp);
 811     cp = ZOOM_options_get(r->options, "schema");
 812     if (cp)
 813         r->schema = xstrdup(cp);
 814
 815     r->databaseNames = set_DatabaseNames(c, c->options, &r->num_databaseNames,
 816                                          r->odr);
 817
 818     r->connection = c;
 819
 820     r->next = c->resultsets;
 821     c->resultsets = r;
 822
 823     if (c->host_port && c->proto == PROTO_HTTP)
 824     {
 825         if (!c->cs)
 826         {
 827             yaz_log(log_details, "ZOOM_connection_search: no comstack");
 828             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 829         }
 830         else
 831         {
 832             yaz_log(log_details, "ZOOM_connection_search: reconnect");
 833             c->reconnect_ok = 1;
 834         }
 835     }
 836
 837     task = ZOOM_connection_add_task(c, ZOOM_TASK_SEARCH);
 838     task->u.search.resultset = r;
 839     task->u.search.start = start;
 840     task->u.search.count = count;
 841
 842     syntax = ZOOM_options_get(r->options, "preferredRecordSyntax");
 843     task->u.search.syntax = syntax ? xstrdup(syntax) : 0;
 844     elementSetName = ZOOM_options_get(r->options, "elementSetName");
 845     task->u.search.elementSetName = elementSetName
 846         ? xstrdup(elementSetName) : 0;
 847
 848     ZOOM_resultset_addref(r);
 849
 850     (q->refcount)++;
 851
 852     if (!c->async)
 853     {
 854         while (ZOOM_event(1, &c))
 855             ;
 856     }
 857     return r;
 858 }
 859
 860 /*
 861  * This is the old result-set sorting API, which is maintained only
 862  * for the sake of binary compatibility.  There is no reason ever to
 863  * use this rather than ZOOM_resultset_sort1().
 864  */
 865 ZOOM_API(void)
 866     ZOOM_resultset_sort(ZOOM_resultset r,
 867                         const char *sort_type, const char *sort_spec)
 868 {
 869     (void) ZOOM_resultset_sort1(r, sort_type, sort_spec);
 870 }
 871
 872 ZOOM_API(int)
 873     ZOOM_resultset_sort1(ZOOM_resultset r,
 874                          const char *sort_type, const char *sort_spec)
 875 {
 876     ZOOM_connection c = r->connection;
 877     ZOOM_task task;
 878     ZOOM_query newq;
 879
 880     newq = ZOOM_query_create();
 881     if (ZOOM_query_sortby(newq, sort_spec) < 0)
 882         return -1;
 883
 884     yaz_log(log_api, "%p ZOOM_resultset_sort r=%p sort_type=%s sort_spec=%s",
 885             r, r, sort_type, sort_spec);
 886     if (!c)
 887         return 0;
 888
 889     if (c->host_port && c->proto == PROTO_HTTP)
 890     {
 891         if (!c->cs)
 892         {
 893             yaz_log(log_details, "%p ZOOM_resultset_sort: no comstack", r);
 894             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 895         }
 896         else
 897         {
 898             yaz_log(log_details, "%p ZOOM_resultset_sort: prepare reconnect",
 899                     r);
 900             c->reconnect_ok = 1;
 901         }
 902     }
 903
 904     ZOOM_resultset_cache_reset(r);
 905     task = ZOOM_connection_add_task(c, ZOOM_TASK_SORT);
 906     task->u.sort.resultset = r;
 907     task->u.sort.q = newq;
 908
 909     ZOOM_resultset_addref(r);
 910
 911     if (!c->async)
 912     {
 913         while (ZOOM_event(1, &c))
 914             ;
 915     }
 916
 917     return 0;
 918 }
 919
 920 ZOOM_API(void)
 921     ZOOM_resultset_cache_reset(ZOOM_resultset r)
 922 {
 923     int i;
 924     for (i = 0; i<RECORD_HASH_SIZE; i++)
 925     {
 926         ZOOM_record_cache rc;
 927         for (rc = r->record_hash[i]; rc; rc = rc->next)
 928         {
 929             if (rc->rec.wrbuf_marc)
 930                 wrbuf_free(rc->rec.wrbuf_marc, 1);
 931             if (rc->rec.wrbuf_iconv)
 932                 wrbuf_free(rc->rec.wrbuf_iconv, 1);
 933             if (rc->rec.wrbuf_opac)
 934                 wrbuf_free(rc->rec.wrbuf_opac, 1);
 935         }
 936         r->record_hash[i] = 0;
 937     }
 938 }
 939
 940 ZOOM_API(void)
 941     ZOOM_resultset_destroy(ZOOM_resultset r)
 942 {
 943     resultset_destroy(r);
 944 }
 945
 946 static void resultset_destroy(ZOOM_resultset r)
 947 {
 948     if (!r)
 949         return;
 950     (r->refcount)--;
 951     yaz_log(log_details, "%p ZOOM_resultset_destroy r=%p count=%d",
 952             r, r, r->refcount);
 953     if (r->refcount == 0)
 954     {
 955         ZOOM_resultset_cache_reset(r);
 956
 957         if (r->connection)
 958         {
 959             /* remove ourselves from the resultsets in connection */
 960             ZOOM_resultset *rp = &r->connection->resultsets;
 961             while (1)
 962             {
 963                 assert(*rp);   /* we must be in this list!! */
 964                 if (*rp == r)
 965                 {   /* OK, we're here - take us out of it */
 966                     *rp = (*rp)->next;
 967                     break;
 968                 }
 969                 rp = &(*rp)->next;
 970             }
 971         }
 972         ZOOM_query_destroy(r->query);
 973         ZOOM_options_destroy(r->options);
 974         odr_destroy(r->odr);
 975         xfree(r->setname);
 976         xfree(r->schema);
 977         xfree(r);
 978     }
 979 }
 980
 981 ZOOM_API(size_t)
 982     ZOOM_resultset_size(ZOOM_resultset r)
 983 {
 984     yaz_log(log_details, "ZOOM_resultset_size r=%p count=%d",
 985             r, r->size);
 986     return r->size;
 987 }
 988
 989 static void do_close(ZOOM_connection c)
 990 {
 991     if (c->cs)
 992         cs_close(c->cs);
 993     c->cs = 0;
 994     ZOOM_connection_set_mask(c, 0);
 995     c->state = STATE_IDLE;
 996 }
 997
 998 static int ZOOM_test_reconnect(ZOOM_connection c)
 999 {
1000     ZOOM_Event event;
1001
1002     if (!c->reconnect_ok)
1003         return 0;
1004     do_close(c);
1005     c->reconnect_ok = 0;
1006     c->tasks->running = 0;
1007     ZOOM_connection_insert_task(c, ZOOM_TASK_CONNECT);
1008
1009     event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
1010     ZOOM_connection_put_event(c, event);
1011
1012     return 1;
1013 }
1014
1015 static void ZOOM_resultset_retrieve(ZOOM_resultset r,
1016                                     int force_sync, int start, int count)
1017 {
1018     ZOOM_task task;
1019     ZOOM_connection c;
1020     const char *cp;
1021     const char *syntax, *elementSetName;
1022
1023     if (!r)
1024         return;
1025     yaz_log(log_details, "%p ZOOM_resultset_retrieve force_sync=%d start=%d"
1026             " count=%d", r, force_sync, start, count);
1027     c = r->connection;
1028     if (!c)
1029         return;
1030
1031     if (c->host_port && c->proto == PROTO_HTTP)
1032     {
1033         if (!c->cs)
1034         {
1035             yaz_log(log_details, "%p ZOOM_resultset_retrieve: no comstack", r);
1036             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
1037         }
1038         else
1039         {
1040             yaz_log(log_details, "%p ZOOM_resultset_retrieve: prepare "
1041                     "reconnect", r);
1042             c->reconnect_ok = 1;
1043         }
1044     }
1045     task = ZOOM_connection_add_task(c, ZOOM_TASK_RETRIEVE);
1046     task->u.retrieve.resultset = r;
1047     task->u.retrieve.start = start;
1048     task->u.retrieve.count = count;
1049
1050     syntax = ZOOM_options_get(r->options, "preferredRecordSyntax");
1051     task->u.retrieve.syntax = syntax ? xstrdup(syntax) : 0;
1052     elementSetName = ZOOM_options_get(r->options, "elementSetName");
1053     task->u.retrieve.elementSetName = elementSetName
1054         ? xstrdup(elementSetName) : 0;
1055
1056     cp = ZOOM_options_get(r->options, "schema");
1057     if (cp)
1058     {
1059         if (!r->schema || strcmp(r->schema, cp))
1060         {
1061             xfree(r->schema);
1062             r->schema = xstrdup(cp);
1063         }
1064     }
1065
1066     ZOOM_resultset_addref(r);
1067
1068     if (!r->connection->async || force_sync)
1069         while (r->connection && ZOOM_event(1, &r->connection))
1070             ;
1071 }
1072
1073 ZOOM_API(void)
1074     ZOOM_resultset_records(ZOOM_resultset r, ZOOM_record *recs,
1075                            size_t start, size_t count)
1076 {
1077     int force_present = 0;
1078
1079     if (!r)
1080         return ;
1081     yaz_log(log_api, "%p ZOOM_resultset_records r=%p start=%ld count=%ld",
1082             r, r, (long) start, (long) count);
1083     if (count && recs)
1084         force_present = 1;
1085     ZOOM_resultset_retrieve(r, force_present, start, count);
1086     if (force_present)
1087     {
1088         size_t i;
1089         for (i = 0; i< count; i++)
1090             recs[i] = ZOOM_resultset_record_immediate(r, i+start);
1091     }
1092 }
1093
1094 static void get_cert(ZOOM_connection c)
1095 {
1096     char *cert_buf;
1097     int cert_len;
1098
1099     if (cs_get_peer_certificate_x509(c->cs, &cert_buf, &cert_len))
1100     {
1101         ZOOM_connection_option_setl(c, "sslPeerCert",
1102                                     cert_buf, cert_len);
1103         xfree(cert_buf);
1104     }
1105 }
1106
1107 static zoom_ret do_connect(ZOOM_connection c)
1108 {
1109     void *add;
1110     const char *effective_host;
1111
1112     if (c->proxy)
1113         effective_host = c->proxy;
1114     else
1115         effective_host = c->host_port;
1116
1117     yaz_log(log_details, "%p do_connect effective_host=%s", c, effective_host);
1118
1119     if (c->cs)
1120         cs_close(c->cs);
1121     c->cs = cs_create_host(effective_host, 0, &add);
1122
1123     if (c->cs && c->cs->protocol == PROTO_HTTP)
1124     {
1125 #if YAZ_HAVE_XML2
1126         const char *path = 0;
1127
1128         c->proto = PROTO_HTTP;
1129         cs_get_host_args(c->host_port, &path);
1130         xfree(c->path);
1131         c->path = (char*) xmalloc(strlen(path)+2);
1132         c->path[0] = '/';
1133         strcpy(c->path+1, path);
1134 #else
1135         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
1136         do_close(c);
1137         return zoom_complete;
1138 #endif
1139     }
1140     if (c->cs)
1141     {
1142         int ret = cs_connect(c->cs, add);
1143         if (ret == 0)
1144         {
1145             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
1146             ZOOM_connection_put_event(c, event);
1147             get_cert(c);
1148             if (c->proto == PROTO_Z3950)
1149                 ZOOM_connection_send_init(c);
1150             else
1151             {
1152                 /* no init request for SRW .. */
1153                 assert(c->tasks->which == ZOOM_TASK_CONNECT);
1154                 ZOOM_connection_remove_task(c);
1155                 ZOOM_connection_set_mask(c, 0);
1156                 ZOOM_connection_exec_task(c);
1157             }
1158             c->state = STATE_ESTABLISHED;
1159             return zoom_pending;
1160         }
1161         else if (ret > 0)
1162         {
1163             int mask = ZOOM_SELECT_EXCEPT;
1164             if (c->cs->io_pending & CS_WANT_WRITE)
1165                 mask += ZOOM_SELECT_WRITE;
1166             if (c->cs->io_pending & CS_WANT_READ)
1167                 mask += ZOOM_SELECT_READ;
1168             ZOOM_connection_set_mask(c, mask);
1169             c->state = STATE_CONNECTING;
1170             return zoom_pending;
1171         }
1172     }
1173     c->state = STATE_IDLE;
1174     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, c->host_port);
1175     return zoom_complete;
1176 }
1177
1178 static void otherInfo_attach(ZOOM_connection c, Z_APDU *a, ODR out)
1179 {
1180     int i;
1181     for (i = 0; i<200; i++)
1182     {
1183         size_t len;
1184         Z_OtherInformation **oi;
1185         char buf[80];
1186         const char *val;
1187         const char *cp;
1188         int oidval;
1189
1190         sprintf(buf, "otherInfo%d", i);
1191         val = ZOOM_options_get(c->options, buf);
1192         if (!val)
1193             break;
1194         cp = strchr(val, ':');
1195         if (!cp)
1196             continue;
1197         len = cp - val;
1198         if (len >= sizeof(buf))
1199             len = sizeof(buf)-1;
1200         memcpy(buf, val, len);
1201         buf[len] = '\0';
1202         oidval = oid_getvalbyname(buf);
1203         if (oidval == VAL_NONE)
1204             continue;
1205
1206         yaz_oi_APDU(a, &oi);
1207         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
1208     }
1209 }
1210
1211 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
1212 {
1213     assert(a);
1214     if (c->cookie_out)
1215     {
1216         Z_OtherInformation **oi;
1217         yaz_oi_APDU(a, &oi);
1218         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
1219     }
1220     if (c->client_IP)
1221     {
1222         Z_OtherInformation **oi;
1223         yaz_oi_APDU(a, &oi);
1224         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
1225     }
1226     otherInfo_attach(c, a, out);
1227     if (!z_APDU(out, &a, 0, 0))
1228     {
1229         FILE *outf = fopen("/tmp/apdu.txt", "a");
1230         if (a && outf)
1231         {
1232             ODR odr_pr = odr_createmem(ODR_PRINT);
1233             fprintf(outf, "a=%p\n", a);
1234             odr_setprint(odr_pr, outf);
1235             z_APDU(odr_pr, &a, 0, 0);
1236             odr_destroy(odr_pr);
1237         }
1238         yaz_log(log_api, "%p encoding_APDU: encoding failed", c);
1239         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
1240         odr_reset(out);
1241         return -1;
1242     }
1243     yaz_log(log_details, "%p encoding_APDU encoding OK", c);
1244     return 0;
1245 }
1246
1247 static zoom_ret send_APDU(ZOOM_connection c, Z_APDU *a)
1248 {
1249     ZOOM_Event event;
1250     assert(a);
1251     if (encode_APDU(c, a, c->odr_out))
1252         return zoom_complete;
1253     yaz_log(log_details, "%p send APDU type=%d", c, a->which);
1254     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1255     event = ZOOM_Event_create(ZOOM_EVENT_SEND_APDU);
1256     ZOOM_connection_put_event(c, event);
1257     odr_reset(c->odr_out);
1258     return do_write(c);
1259 }
1260
1261 /* returns 1 if PDU was sent OK (still pending )
1262    0 if PDU was not sent OK (nothing to wait for)
1263 */
1264
1265 static zoom_ret ZOOM_connection_send_init(ZOOM_connection c)
1266 {
1267     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
1268     Z_InitRequest *ireq = apdu->u.initRequest;
1269     Z_IdAuthentication *auth = (Z_IdAuthentication *)
1270         odr_malloc(c->odr_out, sizeof(*auth));
1271     const char *auth_groupId = ZOOM_options_get(c->options, "group");
1272     const char *auth_userId = ZOOM_options_get(c->options, "user");
1273     const char *auth_password = ZOOM_options_get(c->options, "password");
1274     char *version;
1275
1276     /* support the pass for backwards compatibility */
1277     if (!auth_password)
1278         auth_password = ZOOM_options_get(c->options, "pass");
1279
1280     ODR_MASK_SET(ireq->options, Z_Options_search);
1281     ODR_MASK_SET(ireq->options, Z_Options_present);
1282     ODR_MASK_SET(ireq->options, Z_Options_scan);
1283     ODR_MASK_SET(ireq->options, Z_Options_sort);
1284     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
1285     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
1286
1287     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
1288     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
1289     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
1290
1291     /* Index Data's Z39.50 Implementor Id is 81 */
1292     ireq->implementationId =
1293         odr_prepend(c->odr_out,
1294                     ZOOM_options_get(c->options, "implementationId"),
1295                     odr_prepend(c->odr_out, "81", ireq->implementationId));
1296
1297     ireq->implementationName =
1298         odr_prepend(c->odr_out,
1299                     ZOOM_options_get(c->options, "implementationName"),
1300                     odr_prepend(c->odr_out, "ZOOM-C",
1301                                 ireq->implementationName));
1302
1303     version = odr_strdup(c->odr_out, "$Revision: 1.116 $");
1304     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
1305         version[strlen(version)-2] = '\0';
1306     ireq->implementationVersion =
1307         odr_prepend(c->odr_out,
1308                     ZOOM_options_get(c->options, "implementationVersion"),
1309                     odr_prepend(c->odr_out, &version[11],
1310                                 ireq->implementationVersion));
1311
1312     *ireq->maximumRecordSize =
1313         ZOOM_options_get_int(c->options, "maximumRecordSize", 1024*1024);
1314     *ireq->preferredMessageSize =
1315         ZOOM_options_get_int(c->options, "preferredMessageSize", 1024*1024);
1316
1317     if (auth_groupId || auth_password)
1318     {
1319         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
1320         int i = 0;
1321         pass->groupId = 0;
1322         if (auth_groupId && *auth_groupId)
1323         {
1324             pass->groupId = (char *)
1325                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
1326             strcpy(pass->groupId, auth_groupId);
1327             i++;
1328         }
1329         pass->userId = 0;
1330         if (auth_userId && *auth_userId)
1331         {
1332             pass->userId = (char *)
1333                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
1334             strcpy(pass->userId, auth_userId);
1335             i++;
1336         }
1337         pass->password = 0;
1338         if (auth_password && *auth_password)
1339         {
1340             pass->password = (char *)
1341                 odr_malloc(c->odr_out, strlen(auth_password)+1);
1342             strcpy(pass->password, auth_password);
1343             i++;
1344         }
1345         if (i)
1346         {
1347             auth->which = Z_IdAuthentication_idPass;
1348             auth->u.idPass = pass;
1349             ireq->idAuthentication = auth;
1350         }
1351     }
1352     else if (auth_userId)
1353     {
1354         auth->which = Z_IdAuthentication_open;
1355         auth->u.open = (char *)
1356             odr_malloc(c->odr_out, strlen(auth_userId)+1);
1357         strcpy(auth->u.open, auth_userId);
1358         ireq->idAuthentication = auth;
1359     }
1360     if (c->proxy)
1361         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
1362                                  VAL_PROXY, 1, c->host_port);
1363     if (c->charset || c->lang)
1364     {
1365         Z_OtherInformation **oi;
1366         Z_OtherInformationUnit *oi_unit;
1367
1368         yaz_oi_APDU(apdu, &oi);
1369
1370         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
1371         {
1372             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
1373             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
1374             oi_unit->information.externallyDefinedInfo =
1375                 yaz_set_proposal_charneg_list(c->odr_out, " ",
1376                                               c->charset, c->lang, 1);
1377         }
1378     }
1379     assert(apdu);
1380     return send_APDU(c, apdu);
1381 }
1382
1383 #if YAZ_HAVE_XML2
1384 static zoom_ret send_srw(ZOOM_connection c, Z_SRW_PDU *sr)
1385 {
1386     Z_GDU *gdu;
1387     ZOOM_Event event;
1388
1389     gdu = z_get_HTTP_Request_host_path(c->odr_out, c->host_port, c->path);
1390
1391     if (c->sru_mode == zoom_sru_get)
1392     {
1393         yaz_sru_get_encode(gdu->u.HTTP_Request, sr, c->odr_out, c->charset);
1394     }
1395     else if (c->sru_mode == zoom_sru_post)
1396     {
1397         yaz_sru_post_encode(gdu->u.HTTP_Request, sr, c->odr_out, c->charset);
1398     }
1399     else if (c->sru_mode == zoom_sru_soap)
1400     {
1401         yaz_sru_soap_encode(gdu->u.HTTP_Request, sr, c->odr_out, c->charset);
1402     }
1403     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1404         return zoom_complete;
1405     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1406
1407     event = ZOOM_Event_create(ZOOM_EVENT_SEND_APDU);
1408     ZOOM_connection_put_event(c, event);
1409     odr_reset(c->odr_out);
1410     return do_write(c);
1411 }
1412 #endif
1413
1414 #if YAZ_HAVE_XML2
1415 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1416 {
1417     int i;
1418     int *start, *count;
1419     ZOOM_resultset resultset = 0;
1420     Z_SRW_PDU *sr = 0;
1421     const char *option_val = 0;
1422
1423     if (c->error)                  /* don't continue on error */
1424         return zoom_complete;
1425     assert(c->tasks);
1426     switch(c->tasks->which)
1427     {
1428     case ZOOM_TASK_SEARCH:
1429         resultset = c->tasks->u.search.resultset;
1430         resultset->setname = xstrdup("default");
1431         ZOOM_options_set(resultset->options, "setname", resultset->setname);
1432         start = &c->tasks->u.search.start;
1433         count = &c->tasks->u.search.count;
1434         break;
1435     case ZOOM_TASK_RETRIEVE:
1436         resultset = c->tasks->u.retrieve.resultset;
1437
1438         start = &c->tasks->u.retrieve.start;
1439         count = &c->tasks->u.retrieve.count;
1440
1441         if (*start >= resultset->size)
1442             return zoom_complete;
1443         if (*start + *count > resultset->size)
1444             *count = resultset->size - *start;
1445
1446         for (i = 0; i < *count; i++)
1447         {
1448             ZOOM_record rec =
1449                 record_cache_lookup(resultset, i + *start,
1450                                     c->tasks->u.retrieve.syntax,
1451                                     c->tasks->u.retrieve.elementSetName);
1452             if (!rec)
1453                 break;
1454             else
1455             {
1456                 ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1457                 ZOOM_connection_put_event(c, event);
1458             }
1459         }
1460         *start += i;
1461         *count -= i;
1462
1463         if (*count == 0)
1464             return zoom_complete;
1465         break;
1466     default:
1467         return zoom_complete;
1468     }
1469     assert(resultset->query);
1470
1471     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1472
1473     if (resultset->query->z_query->which == Z_Query_type_104
1474         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1475     {
1476         sr->u.request->query_type = Z_SRW_query_type_cql;
1477         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1478     }
1479     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1480              resultset->query->z_query->u.type_1)
1481     {
1482         sr->u.request->query_type = Z_SRW_query_type_pqf;
1483         sr->u.request->query.pqf = resultset->query->query_string;
1484     }
1485     else
1486     {
1487         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1488         return zoom_complete;
1489     }
1490     sr->u.request->startRecord = odr_intdup(c->odr_out, *start + 1);
1491     sr->u.request->maximumRecords = odr_intdup(
1492         c->odr_out, resultset->step>0 ? resultset->step : *count);
1493     sr->u.request->recordSchema = resultset->schema;
1494
1495     option_val = ZOOM_resultset_option_get(resultset, "recordPacking");
1496     if (option_val)
1497         sr->u.request->recordPacking = odr_strdup(c->odr_out, option_val);
1498
1499     option_val = ZOOM_resultset_option_get(resultset, "extraArgs");
1500     if (option_val)
1501         sr->extra_args = odr_strdup(c->odr_out, option_val);
1502     return send_srw(c, sr);
1503 }
1504 #else
1505 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1506 {
1507     return zoom_complete;
1508 }
1509 #endif
1510
1511 static zoom_ret ZOOM_connection_send_search(ZOOM_connection c)
1512 {
1513     ZOOM_resultset r;
1514     int lslb, ssub, mspn;
1515     const char *syntax;
1516     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1517     Z_SearchRequest *search_req = apdu->u.searchRequest;
1518     const char *elementSetName;
1519     const char *smallSetElementSetName;
1520     const char *mediumSetElementSetName;
1521
1522     assert(c->tasks);
1523     assert(c->tasks->which == ZOOM_TASK_SEARCH);
1524
1525     r = c->tasks->u.search.resultset;
1526
1527     yaz_log(log_details, "%p ZOOM_connection_send_search set=%p", c, r);
1528
1529     elementSetName =
1530         ZOOM_options_get(r->options, "elementSetName");
1531     smallSetElementSetName  =
1532         ZOOM_options_get(r->options, "smallSetElementSetName");
1533     mediumSetElementSetName =
1534         ZOOM_options_get(r->options, "mediumSetElementSetName");
1535
1536     if (!smallSetElementSetName)
1537         smallSetElementSetName = elementSetName;
1538
1539     if (!mediumSetElementSetName)
1540         mediumSetElementSetName = elementSetName;
1541
1542     assert(r);
1543     assert(r->query);
1544
1545     /* prepare query for the search request */
1546     search_req->query = r->query->z_query;
1547     if (!search_req->query)
1548     {
1549         set_ZOOM_error(c, ZOOM_ERROR_INVALID_QUERY, 0);
1550         return zoom_complete;
1551     }
1552
1553     search_req->databaseNames = r->databaseNames;
1554     search_req->num_databaseNames = r->num_databaseNames;
1555
1556     /* get syntax (no need to provide unless piggyback is in effect) */
1557     syntax = c->tasks->u.search.syntax;
1558
1559     lslb = ZOOM_options_get_int(r->options, "largeSetLowerBound", -1);
1560     ssub = ZOOM_options_get_int(r->options, "smallSetUpperBound", -1);
1561     mspn = ZOOM_options_get_int(r->options, "mediumSetPresentNumber", -1);
1562     if (lslb != -1 && ssub != -1 && mspn != -1)
1563     {
1564         /* So're a Z39.50 expert? Let's hope you don't do sort */
1565         *search_req->largeSetLowerBound = lslb;
1566         *search_req->smallSetUpperBound = ssub;
1567         *search_req->mediumSetPresentNumber = mspn;
1568     }
1569     else if (c->tasks->u.search.start == 0 && c->tasks->u.search.count > 0
1570              && r->piggyback && !r->r_sort_spec && !r->schema)
1571     {
1572         /* Regular piggyback - do it unless we're going to do sort */
1573         *search_req->largeSetLowerBound = 2000000000;
1574         *search_req->smallSetUpperBound = 1;
1575         *search_req->mediumSetPresentNumber =
1576             r->step>0 ? r->step : c->tasks->u.search.count;
1577     }
1578     else
1579     {
1580         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1581         smallSetElementSetName = 0;
1582         mediumSetElementSetName = 0;
1583         syntax = 0;
1584     }
1585     if (smallSetElementSetName && *smallSetElementSetName)
1586     {
1587         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1588             odr_malloc(c->odr_out, sizeof(*esn));
1589
1590         esn->which = Z_ElementSetNames_generic;
1591         esn->u.generic = odr_strdup(c->odr_out, smallSetElementSetName);
1592         search_req->smallSetElementSetNames = esn;
1593     }
1594     if (mediumSetElementSetName && *mediumSetElementSetName)
1595     {
1596         Z_ElementSetNames *esn =(Z_ElementSetNames *)
1597             odr_malloc(c->odr_out, sizeof(*esn));
1598
1599         esn->which = Z_ElementSetNames_generic;
1600         esn->u.generic = odr_strdup(c->odr_out, mediumSetElementSetName);
1601         search_req->mediumSetElementSetNames = esn;
1602     }
1603     if (syntax)
1604         search_req->preferredRecordSyntax =
1605             zoom_yaz_str_to_z3950oid(c, CLASS_RECSYN, syntax);
1606
1607     if (!r->setname)
1608     {
1609         if (c->support_named_resultsets)
1610         {
1611             char setname[14];
1612             int ord;
1613             /* find the lowest unused ordinal so that we re-use
1614                result sets on the server. */
1615             for (ord = 1; ; ord++)
1616             {
1617                 ZOOM_resultset rp;
1618                 sprintf(setname, "%d", ord);
1619                 for (rp = c->resultsets; rp; rp = rp->next)
1620                     if (rp->setname && !strcmp(rp->setname, setname))
1621                         break;
1622                 if (!rp)
1623                     break;
1624             }
1625             r->setname = xstrdup(setname);
1626             yaz_log(log_details, "%p ZOOM_connection_send_search: allocating "
1627                     "set %s", c, r->setname);
1628         }
1629         else
1630         {
1631             yaz_log(log_details, "%p ZOOM_connection_send_search: using "
1632                     "default set", c);
1633             r->setname = xstrdup("default");
1634         }
1635         ZOOM_options_set(r->options, "setname", r->setname);
1636     }
1637     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1638     return send_APDU(c, apdu);
1639 }
1640
1641 static void response_default_diag(ZOOM_connection c, Z_DefaultDiagFormat *r)
1642 {
1643     int oclass;
1644     char *addinfo = 0;
1645
1646     switch (r->which)
1647     {
1648     case Z_DefaultDiagFormat_v2Addinfo:
1649         addinfo = r->u.v2Addinfo;
1650         break;
1651     case Z_DefaultDiagFormat_v3Addinfo:
1652         addinfo = r->u.v3Addinfo;
1653         break;
1654     }
1655     xfree(c->addinfo);
1656     c->addinfo = 0;
1657     set_dset_error(c, *r->condition,
1658                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1659                    addinfo, 0);
1660 }
1661
1662 static void response_diag(ZOOM_connection c, Z_DiagRec *p)
1663 {
1664     if (p->which != Z_DiagRec_defaultFormat)
1665         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1666     else
1667         response_default_diag(c, p->u.defaultFormat);
1668 }
1669
1670 ZOOM_API(ZOOM_record)
1671     ZOOM_record_clone(ZOOM_record srec)
1672 {
1673     char *buf;
1674     int size;
1675     ODR odr_enc;
1676     ZOOM_record nrec;
1677
1678     odr_enc = odr_createmem(ODR_ENCODE);
1679     if (!z_NamePlusRecord(odr_enc, &srec->npr, 0, 0))
1680         return 0;
1681     buf = odr_getbuf(odr_enc, &size, 0);
1682
1683     nrec = (ZOOM_record) xmalloc(sizeof(*nrec));
1684     nrec->odr = odr_createmem(ODR_DECODE);
1685     nrec->wrbuf_marc = 0;
1686     nrec->wrbuf_iconv = 0;
1687     nrec->wrbuf_opac = 0;
1688     odr_setbuf(nrec->odr, buf, size, 0);
1689     z_NamePlusRecord(nrec->odr, &nrec->npr, 0, 0);
1690
1691     odr_destroy(odr_enc);
1692     return nrec;
1693 }
1694
1695 ZOOM_API(ZOOM_record)
1696     ZOOM_resultset_record_immediate(ZOOM_resultset s,size_t pos)
1697 {
1698     const char *syntax =
1699         ZOOM_options_get(s->options, "preferredRecordSyntax");
1700     const char *elementSetName =
1701         ZOOM_options_get(s->options, "elementSetName");
1702
1703     return record_cache_lookup(s, pos, syntax, elementSetName);
1704 }
1705
1706 ZOOM_API(ZOOM_record)
1707     ZOOM_resultset_record(ZOOM_resultset r, size_t pos)
1708 {
1709     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1710
1711     if (!rec)
1712     {
1713         /*
1714          * MIKE: I think force_sync should always be zero, but I don't
1715          * want to make this change until I get the go-ahead from
1716          * Adam, in case something depends on the old synchronous
1717          * behaviour.
1718          */
1719         int force_sync = 1;
1720         if (getenv("ZOOM_RECORD_NO_FORCE_SYNC")) force_sync = 0;
1721         ZOOM_resultset_retrieve(r, force_sync, pos, 1);
1722         rec = ZOOM_resultset_record_immediate(r, pos);
1723     }
1724     return rec;
1725 }
1726
1727 ZOOM_API(void)
1728     ZOOM_record_destroy(ZOOM_record rec)
1729 {
1730     if (!rec)
1731         return;
1732     if (rec->wrbuf_marc)
1733         wrbuf_free(rec->wrbuf_marc, 1);
1734     if (rec->wrbuf_iconv)
1735         wrbuf_free(rec->wrbuf_iconv, 1);
1736     if (rec->wrbuf_opac)
1737         wrbuf_free(rec->wrbuf_opac, 1);
1738     odr_destroy(rec->odr);
1739     xfree(rec);
1740 }
1741
1742 static const char *marc_iconv_return(ZOOM_record rec, int marc_type,
1743                                      int *len,
1744                                      const char *buf, int sz,
1745                                      const char *record_charset)
1746 {
1747     char to[40];
1748     char from[40];
1749     yaz_iconv_t cd = 0;
1750     yaz_marc_t mt = yaz_marc_create();
1751
1752     *from = '\0';
1753     strcpy(to, "UTF-8");
1754     if (record_charset && *record_charset)
1755     {
1756         /* Use "from,to" or just "from" */
1757         const char *cp = strchr(record_charset, ',');
1758         int clen = strlen(record_charset);
1759         if (cp && cp[1])
1760         {
1761             strncpy( to, cp+1, sizeof(to)-1);
1762             to[sizeof(to)-1] = '\0';
1763             clen = cp - record_charset;
1764         }
1765         if (clen > sizeof(from)-1)
1766             clen = sizeof(from)-1;
1767
1768         if (clen)
1769             strncpy(from, record_charset, clen);
1770         from[clen] = '\0';
1771     }
1772
1773     if (*from && *to)
1774     {
1775         cd = yaz_iconv_open(to, from);
1776         yaz_marc_iconv(mt, cd);
1777     }
1778
1779     yaz_marc_xml(mt, marc_type);
1780     if (!rec->wrbuf_marc)
1781         rec->wrbuf_marc = wrbuf_alloc();
1782     wrbuf_rewind(rec->wrbuf_marc);
1783     if (yaz_marc_decode_wrbuf(mt, buf, sz, rec->wrbuf_marc) > 0)
1784     {
1785         yaz_marc_destroy(mt);
1786         if (cd)
1787             yaz_iconv_close(cd);
1788         if (len)
1789             *len = wrbuf_len(rec->wrbuf_marc);
1790         return wrbuf_buf(rec->wrbuf_marc);
1791     }
1792     yaz_marc_destroy(mt);
1793     if (cd)
1794         yaz_iconv_close(cd);
1795     return 0;
1796 }
1797
1798 static const char *record_iconv_return(ZOOM_record rec, int *len,
1799                                        const char *buf, int sz,
1800                                        const char *record_charset)
1801 {
1802     char to[40];
1803     char from[40];
1804     yaz_iconv_t cd = 0;
1805
1806     *from = '\0';
1807     strcpy(to, "UTF-8");
1808     if (record_charset && *record_charset)
1809     {
1810         /* Use "from,to" or just "from" */
1811         const char *cp = strchr(record_charset, ',');
1812         int clen = strlen(record_charset);
1813         if (cp && cp[1])
1814         {
1815             strncpy( to, cp+1, sizeof(to)-1);
1816             to[sizeof(to)-1] = '\0';
1817             clen = cp - record_charset;
1818         }
1819         if (clen > sizeof(from)-1)
1820             clen = sizeof(from)-1;
1821
1822         if (clen)
1823             strncpy(from, record_charset, clen);
1824         from[clen] = '\0';
1825     }
1826
1827     if (*from && *to && (cd = yaz_iconv_open(to, from)))
1828     {
1829         char outbuf[12];
1830         size_t inbytesleft = sz;
1831         const char *inp = buf;
1832
1833         if (!rec->wrbuf_iconv)
1834             rec->wrbuf_iconv = wrbuf_alloc();
1835
1836         wrbuf_rewind(rec->wrbuf_iconv);
1837
1838         while (inbytesleft)
1839         {
1840             size_t outbytesleft = sizeof(outbuf);
1841             char *outp = outbuf;
1842             size_t r = yaz_iconv(cd, (char**) &inp,
1843                                  &inbytesleft,
1844                                  &outp, &outbytesleft);
1845             if (r == (size_t) (-1))
1846             {
1847                 int e = yaz_iconv_error(cd);
1848                 if (e != YAZ_ICONV_E2BIG)
1849                     break;
1850             }
1851             wrbuf_write(rec->wrbuf_iconv, outbuf, outp - outbuf);
1852         }
1853         wrbuf_puts(rec->wrbuf_iconv, "");
1854         buf = wrbuf_buf(rec->wrbuf_iconv);
1855         sz = wrbuf_len(rec->wrbuf_iconv);
1856         yaz_iconv_close(cd);
1857     }
1858     if (len)
1859         *len = sz;
1860     return buf;
1861 }
1862
1863 ZOOM_API(int)
1864     ZOOM_record_error(ZOOM_record rec, const char **cp,
1865                       const char **addinfo, const char **diagset)
1866 {
1867     Z_NamePlusRecord *npr;
1868
1869     if (!rec)
1870         return 0;
1871     npr = rec->npr;
1872     if (npr && npr->which == Z_NamePlusRecord_surrogateDiagnostic)
1873     {
1874         Z_DiagRec *diag_rec = npr->u.surrogateDiagnostic;
1875         int error = YAZ_BIB1_UNSPECIFIED_ERROR;
1876         const char *add = 0;
1877
1878         if (diag_rec->which == Z_DiagRec_defaultFormat)
1879         {
1880             Z_DefaultDiagFormat *ddf = diag_rec->u.defaultFormat;
1881             int oclass;
1882
1883             error = *ddf->condition;
1884             switch (ddf->which)
1885             {
1886             case Z_DefaultDiagFormat_v2Addinfo:
1887                 add = ddf->u.v2Addinfo;
1888                 break;
1889             case Z_DefaultDiagFormat_v3Addinfo:
1890                 add = ddf->u.v3Addinfo;
1891                 break;
1892             }
1893             if (diagset)
1894                 *diagset = yaz_z3950oid_to_str(ddf->diagnosticSetId, &oclass);
1895         }
1896         else
1897         {
1898             if (diagset)
1899                 *diagset = "Bib-1";
1900         }
1901         if (addinfo)
1902             *addinfo = add ? add : "";
1903         if (cp)
1904             *cp = diagbib1_str(error);
1905         return error;
1906     }
1907     return 0;
1908 }
1909
1910 ZOOM_API(const char *)
1911     ZOOM_record_get(ZOOM_record rec, const char *type_spec, int *len)
1912 {
1913     char type[40];
1914     char charset[40];
1915     char xpath[512];
1916     const char *cp;
1917     int i;
1918     Z_NamePlusRecord *npr;
1919
1920     if (len)
1921         *len = 0; /* default return */
1922
1923     if (!rec)
1924         return 0;
1925     npr = rec->npr;
1926     if (!npr)
1927         return 0;
1928
1929     cp = type_spec;
1930     for (i = 0; cp[i] && i < sizeof(type)-1; i++)
1931     {
1932         if (cp[i] == ';' || cp[i] == ' ')
1933             break;
1934         type[i] = cp[i];
1935     }
1936     type[i] = '\0';
1937     charset[0] = '\0';
1938     while (type_spec[i] == ';')
1939     {
1940         i++;
1941         while (type_spec[i] == ' ')
1942             i++;
1943         if (!strncmp(type_spec+i, "charset=", 8))
1944         {
1945             int j = 0;
1946             i = i + 8; /* skip charset= */
1947             for (j = 0; type_spec[i]  && j < sizeof(charset)-1; i++, j++)
1948             {
1949                 if (type_spec[i] == ';' || type_spec[i] == ' ')
1950                     break;
1951                 charset[j] = cp[i];
1952             }
1953             charset[j] = '\0';
1954         }
1955         else if (!strncmp(type_spec+i, "xpath=", 6))
1956         {
1957             int j = 0;
1958             i = i + 6;
1959             for (j = 0; type_spec[i] && j < sizeof(xpath)-1; i++, j++)
1960                 xpath[j] = cp[i];
1961             xpath[j] = '\0';
1962         }
1963         while (type_spec[i] == ' ')
1964             i++;
1965     }
1966     if (!strcmp(type, "database"))
1967     {
1968         if (len)
1969             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1970         return npr->databaseName;
1971     }
1972     else if (!strcmp(type, "syntax"))
1973     {
1974         const char *desc = 0;
1975         if (npr->which == Z_NamePlusRecord_databaseRecord)
1976         {
1977             Z_External *r = (Z_External *) npr->u.databaseRecord;
1978             oident *ent = oid_getentbyoid(r->direct_reference);
1979             if (ent)
1980                 desc = ent->desc;
1981         }
1982         if (!desc)
1983             desc = "none";
1984         if (len)
1985             *len = strlen(desc);
1986         return desc;
1987     }
1988     if (npr->which != Z_NamePlusRecord_databaseRecord)
1989         return 0;
1990
1991     /* from now on - we have a database record .. */
1992     if (!strcmp(type, "render"))
1993     {
1994         Z_External *r = (Z_External *) npr->u.databaseRecord;
1995         oident *ent = oid_getentbyoid(r->direct_reference);
1996
1997         /* render bibliographic record .. */
1998         if (r->which == Z_External_OPAC)
1999         {
2000             r = r->u.opac->bibliographicRecord;
2001             if (!r)
2002                 return 0;
2003             ent = oid_getentbyoid(r->direct_reference);
2004         }
2005         if (r->which == Z_External_sutrs)
2006             return record_iconv_return(rec, len,
2007                                        (char*) r->u.sutrs->buf,
2008                                        r->u.sutrs->len,
2009                                        charset);
2010         else if (r->which == Z_External_octet)
2011         {
2012             const char *ret_buf;
2013             switch (ent->value)
2014             {
2015             case VAL_SOIF:
2016             case VAL_HTML:
2017             case VAL_SUTRS:
2018                 break;
2019             case VAL_TEXT_XML:
2020             case VAL_APPLICATION_XML:
2021                 break;
2022             default:
2023                 ret_buf = marc_iconv_return(
2024                     rec, YAZ_MARC_LINE, len,
2025                     (const char *) r->u.octet_aligned->buf,
2026                     r->u.octet_aligned->len,
2027                     charset);
2028                 if (ret_buf)
2029                     return ret_buf;
2030             }
2031             return record_iconv_return(rec, len,
2032                                        (const char *) r->u.octet_aligned->buf,
2033                                        r->u.octet_aligned->len,
2034                                        charset);
2035         }
2036         else if (r->which == Z_External_grs1)
2037         {
2038             if (!rec->wrbuf_marc)
2039                 rec->wrbuf_marc = wrbuf_alloc();
2040             wrbuf_rewind(rec->wrbuf_marc);
2041             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
2042             return record_iconv_return(rec, len,
2043                                        wrbuf_buf(rec->wrbuf_marc),
2044                                        wrbuf_len(rec->wrbuf_marc),
2045                                        charset);
2046         }
2047         return 0;
2048     }
2049     else if (!strcmp(type, "xml"))
2050     {
2051         Z_External *r = (Z_External *) npr->u.databaseRecord;
2052         oident *ent = oid_getentbyoid(r->direct_reference);
2053
2054         /* render bibliographic record .. */
2055         if (r->which == Z_External_OPAC)
2056         {
2057             r = r->u.opac->bibliographicRecord;
2058             if (!r)
2059                 return 0;
2060             ent = oid_getentbyoid(r->direct_reference);
2061         }
2062
2063         if (r->which == Z_External_sutrs)
2064             return record_iconv_return(rec, len,
2065                                        (const char *) r->u.sutrs->buf,
2066                                        r->u.sutrs->len,
2067                                        charset);
2068         else if (r->which == Z_External_octet)
2069         {
2070             const char *ret_buf;
2071             int marc_decode_type = YAZ_MARC_MARCXML;
2072
2073             switch (ent->value)
2074             {
2075             case VAL_SOIF:
2076             case VAL_HTML:
2077             case VAL_SUTRS:
2078                 break;
2079             case VAL_TEXT_XML:
2080             case VAL_APPLICATION_XML:
2081                 break;
2082             default:
2083                 ret_buf = marc_iconv_return(
2084                     rec, marc_decode_type, len,
2085                     (const char *) r->u.octet_aligned->buf,
2086                     r->u.octet_aligned->len,
2087                     charset);
2088                 if (ret_buf)
2089                     return ret_buf;
2090             }
2091             return record_iconv_return(rec, len,
2092                                        (const char *) r->u.octet_aligned->buf,
2093                                        r->u.octet_aligned->len,
2094                                        charset);
2095         }
2096         else if (r->which == Z_External_grs1)
2097         {
2098             if (len) *len = 5;
2099             return "GRS-1";
2100         }
2101         return 0;
2102     }
2103     else if (!strcmp(type, "raw"))
2104     {
2105         Z_External *r = (Z_External *) npr->u.databaseRecord;
2106
2107         if (r->which == Z_External_sutrs)
2108         {
2109             if (len) *len = r->u.sutrs->len;
2110             return (const char *) r->u.sutrs->buf;
2111         }
2112         else if (r->which == Z_External_octet)
2113         {
2114             if (len) *len = r->u.octet_aligned->len;
2115             return (const char *) r->u.octet_aligned->buf;
2116         }
2117         else /* grs-1, explain, OPAC, ... */
2118         {
2119             if (len) *len = -1;
2120             return (const char *) npr->u.databaseRecord;
2121         }
2122         return 0;
2123     }
2124     else if (!strcmp (type, "ext"))
2125     {
2126         if (len) *len = -1;
2127         return (const char *) npr->u.databaseRecord;
2128     }
2129     else if (!strcmp (type, "opac"))
2130
2131     {
2132         Z_External *r = (Z_External *) npr->u.databaseRecord;
2133         if (r->which == Z_External_OPAC)
2134         {
2135             if (!rec->wrbuf_opac)
2136                 rec->wrbuf_opac = wrbuf_alloc();
2137             wrbuf_rewind(rec->wrbuf_opac);
2138             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
2139             return record_iconv_return(rec, len,
2140                                        wrbuf_buf(rec->wrbuf_opac),
2141                                        wrbuf_len(rec->wrbuf_opac),
2142                                        charset);
2143         }
2144     }
2145     return 0;
2146 }
2147
2148 static int strcmp_null(const char *v1, const char *v2)
2149 {
2150     if (!v1 && !v2)
2151         return 0;
2152     if (!v1 || !v2)
2153         return -1;
2154     return strcmp(v1, v2);
2155 }
2156
2157 static size_t record_hash(int pos)
2158 {
2159     if (pos < 0)
2160         pos = 0;
2161     return pos % RECORD_HASH_SIZE;
2162 }
2163
2164 static void record_cache_add(ZOOM_resultset r, Z_NamePlusRecord *npr,
2165                              int pos,
2166                              const char *syntax, const char *elementSetName)
2167 {
2168     ZOOM_record_cache rc;
2169
2170     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
2171     ZOOM_connection_put_event(r->connection, event);
2172
2173     for (rc = r->record_hash[record_hash(pos)]; rc; rc = rc->next)
2174     {
2175         if (pos == rc->pos)
2176         {
2177             if (strcmp_null(r->schema, rc->schema))
2178                 continue;
2179             if (strcmp_null(elementSetName,rc->elementSetName))
2180                 continue;
2181             if (strcmp_null(syntax, rc->syntax))
2182                 continue;
2183             /* not destroying rc->npr (it's handled by nmem )*/
2184             rc->rec.npr = npr;
2185             /* keeping wrbuf_marc too */
2186             return;
2187         }
2188     }
2189     rc = (ZOOM_record_cache) odr_malloc(r->odr, sizeof(*rc));
2190     rc->rec.npr = npr;
2191     rc->rec.odr = 0;
2192     rc->rec.wrbuf_marc = 0;
2193     rc->rec.wrbuf_iconv = 0;
2194     rc->rec.wrbuf_opac = 0;
2195     if (elementSetName)
2196         rc->elementSetName = odr_strdup(r->odr, elementSetName);
2197     else
2198         rc->elementSetName = 0;
2199
2200     if (syntax)
2201         rc->syntax = odr_strdup(r->odr, syntax);
2202     else
2203         rc->syntax = 0;
2204
2205     if (r->schema)
2206         rc->schema = odr_strdup(r->odr, r->schema);
2207     else
2208         rc->schema = 0;
2209
2210     rc->pos = pos;
2211     rc->next = r->record_hash[record_hash(pos)];
2212     r->record_hash[record_hash(pos)] = rc;
2213 }
2214
2215 static ZOOM_record record_cache_lookup(ZOOM_resultset r, int pos,
2216                                        const char *syntax,
2217                                        const char *elementSetName)
2218 {
2219     ZOOM_record_cache rc;
2220
2221     for (rc = r->record_hash[record_hash(pos)]; rc; rc = rc->next)
2222     {
2223         if (pos == rc->pos)
2224         {
2225             if (strcmp_null(r->schema, rc->schema))
2226                 continue;
2227             if (strcmp_null(elementSetName,rc->elementSetName))
2228                 continue;
2229             if (strcmp_null(syntax, rc->syntax))
2230                 continue;
2231             return &rc->rec;
2232         }
2233     }
2234     return 0;
2235 }
2236
2237 static void handle_records(ZOOM_connection c, Z_Records *sr,
2238                            int present_phase)
2239 {
2240     ZOOM_resultset resultset;
2241     int *start, *count;
2242     const char *syntax = 0, *elementSetName = 0;
2243
2244     if (!c->tasks)
2245         return ;
2246     switch (c->tasks->which)
2247     {
2248     case ZOOM_TASK_SEARCH:
2249         resultset = c->tasks->u.search.resultset;
2250         start = &c->tasks->u.search.start;
2251         count = &c->tasks->u.search.count;
2252         syntax = c->tasks->u.search.syntax;
2253         elementSetName = c->tasks->u.search.elementSetName;
2254         break;
2255     case ZOOM_TASK_RETRIEVE:
2256         resultset = c->tasks->u.retrieve.resultset;
2257         start = &c->tasks->u.retrieve.start;
2258         count = &c->tasks->u.retrieve.count;
2259         syntax = c->tasks->u.retrieve.syntax;
2260         elementSetName = c->tasks->u.retrieve.elementSetName;
2261         break;
2262     default:
2263         return;
2264     }
2265     if (sr && sr->which == Z_Records_NSD)
2266         response_default_diag(c, sr->u.nonSurrogateDiagnostic);
2267     else if (sr && sr->which == Z_Records_multipleNSD)
2268     {
2269         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
2270             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
2271         else
2272             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2273     }
2274     else
2275     {
2276         if (*count + *start > resultset->size)
2277             *count = resultset->size - *start;
2278         if (*count < 0)
2279             *count = 0;
2280         if (sr && sr->which == Z_Records_DBOSD)
2281         {
2282             int i;
2283             NMEM nmem = odr_extract_mem(c->odr_in);
2284             Z_NamePlusRecordList *p =
2285                 sr->u.databaseOrSurDiagnostics;
2286             for (i = 0; i<p->num_records; i++)
2287             {
2288                 record_cache_add(resultset, p->records[i], i + *start,
2289                                  syntax, elementSetName);
2290             }
2291             *count -= i;
2292             if (*count < 0)
2293                 *count = 0;
2294             *start += i;
2295             yaz_log(log_details,
2296                     "handle_records resultset=%p start=%d count=%d",
2297                     resultset, *start, *count);
2298
2299             /* transfer our response to search_nmem .. we need it later */
2300             nmem_transfer(resultset->odr->mem, nmem);
2301             nmem_destroy(nmem);
2302             if (present_phase && p->num_records == 0)
2303             {
2304                 /* present response and we didn't get any records! */
2305                 Z_NamePlusRecord *myrec =
2306                     zget_surrogateDiagRec(resultset->odr, 0, 14, 0);
2307                 record_cache_add(resultset, myrec, *start,
2308                                  syntax, elementSetName);
2309             }
2310         }
2311         else if (present_phase)
2312         {
2313             /* present response and we didn't get any records! */
2314             Z_NamePlusRecord *myrec =
2315                 zget_surrogateDiagRec(resultset->odr, 0, 14, 0);
2316             record_cache_add(resultset, myrec, *start, syntax, elementSetName);
2317         }
2318     }
2319 }
2320
2321 static void handle_present_response(ZOOM_connection c, Z_PresentResponse *pr)
2322 {
2323     handle_records(c, pr->records, 1);
2324 }
2325
2326 static void handle_queryExpressionTerm(ZOOM_options opt, const char *name,
2327                                        Z_Term *term)
2328 {
2329     switch (term->which)
2330     {
2331     case Z_Term_general:
2332         ZOOM_options_setl(opt, name,
2333                           (const char *)(term->u.general->buf),
2334                           term->u.general->len);
2335         break;
2336     case Z_Term_characterString:
2337         ZOOM_options_set(opt, name, term->u.characterString);
2338         break;
2339     case Z_Term_numeric:
2340         ZOOM_options_set_int(opt, name, *term->u.numeric);
2341         break;
2342     }
2343 }
2344
2345 static void handle_queryExpression(ZOOM_options opt, const char *name,
2346                                    Z_QueryExpression *exp)
2347 {
2348     char opt_name[80];
2349
2350     switch (exp->which)
2351     {
2352     case Z_QueryExpression_term:
2353         if (exp->u.term && exp->u.term->queryTerm)
2354         {
2355             sprintf(opt_name, "%s.term", name);
2356             handle_queryExpressionTerm(opt, opt_name, exp->u.term->queryTerm);
2357         }
2358         break;
2359     case Z_QueryExpression_query:
2360         break;
2361     }
2362 }
2363
2364 static void handle_searchResult(ZOOM_connection c, ZOOM_resultset resultset,
2365                                 Z_OtherInformation *o)
2366 {
2367     int i;
2368     for (i = 0; o && i < o->num_elements; i++)
2369     {
2370         if (o->list[i]->which == Z_OtherInfo_externallyDefinedInfo)
2371         {
2372             Z_External *ext = o->list[i]->information.externallyDefinedInfo;
2373
2374             if (ext->which == Z_External_searchResult1)
2375             {
2376                 int j;
2377                 Z_SearchInfoReport *sr = ext->u.searchResult1;
2378
2379                 if (sr->num)
2380                     ZOOM_options_set_int(
2381                         resultset->options, "searchresult.size", sr->num);
2382
2383                 for (j = 0; j < sr->num; j++)
2384                 {
2385                     Z_SearchInfoReport_s *ent =
2386                         ext->u.searchResult1->elements[j];
2387                     char pref[80];
2388
2389                     sprintf(pref, "searchresult.%d", j);
2390
2391                     if (ent->subqueryId)
2392                     {
2393                         char opt_name[80];
2394                         sprintf(opt_name, "%s.id", pref);
2395                         ZOOM_options_set(resultset->options, opt_name,
2396                                          ent->subqueryId);
2397                     }
2398                     if (ent->subqueryExpression)
2399                     {
2400                         char opt_name[80];
2401                         sprintf(opt_name, "%s.subquery", pref);
2402                         handle_queryExpression(resultset->options, opt_name,
2403                                                ent->subqueryExpression);
2404                     }
2405                     if (ent->subqueryInterpretation)
2406                     {
2407                         char opt_name[80];
2408                         sprintf(opt_name, "%s.interpretation", pref);
2409                         handle_queryExpression(resultset->options, opt_name,
2410                                                ent->subqueryInterpretation);
2411                     }
2412                     if (ent->subqueryRecommendation)
2413                     {
2414                         char opt_name[80];
2415                         sprintf(opt_name, "%s.recommendation", pref);
2416                         handle_queryExpression(resultset->options, opt_name,
2417                                                ent->subqueryRecommendation);
2418                     }
2419                     if (ent->subqueryCount)
2420                     {
2421                         char opt_name[80];
2422                         sprintf(opt_name, "%s.count", pref);
2423                         ZOOM_options_set_int(resultset->options, opt_name,
2424                                              *ent->subqueryCount);
2425                     }
2426                 }
2427             }
2428         }
2429     }
2430 }
2431
2432 static void handle_search_response(ZOOM_connection c, Z_SearchResponse *sr)
2433 {
2434     ZOOM_resultset resultset;
2435     ZOOM_Event event;
2436
2437     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
2438         return ;
2439
2440     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2441     ZOOM_connection_put_event(c, event);
2442
2443     resultset = c->tasks->u.search.resultset;
2444
2445     if (sr->resultSetStatus)
2446     {
2447         ZOOM_options_set_int(resultset->options, "resultSetStatus",
2448                              *sr->resultSetStatus);
2449     }
2450     if (sr->presentStatus)
2451     {
2452         ZOOM_options_set_int(resultset->options, "presentStatus",
2453                              *sr->presentStatus);
2454     }
2455     handle_searchResult(c, resultset, sr->additionalSearchInfo);
2456
2457     resultset->size = *sr->resultCount;
2458     handle_records(c, sr->records, 0);
2459 }
2460
2461 static void sort_response(ZOOM_connection c, Z_SortResponse *res)
2462 {
2463     if (res->diagnostics && res->num_diagnostics > 0)
2464         response_diag(c, res->diagnostics[0]);
2465 }
2466
2467 static int scan_response(ZOOM_connection c, Z_ScanResponse *res)
2468 {
2469     NMEM nmem = odr_extract_mem(c->odr_in);
2470     ZOOM_scanset scan;
2471
2472     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
2473         return 0;
2474     scan = c->tasks->u.scan.scan;
2475
2476     if (res->entries && res->entries->nonsurrogateDiagnostics)
2477         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
2478     scan->scan_response = res;
2479     nmem_transfer(scan->odr->mem, nmem);
2480     if (res->stepSize)
2481         ZOOM_options_set_int(scan->options, "stepSize", *res->stepSize);
2482     if (res->positionOfTerm)
2483         ZOOM_options_set_int(scan->options, "position", *res->positionOfTerm);
2484     if (res->scanStatus)
2485         ZOOM_options_set_int(scan->options, "scanStatus", *res->scanStatus);
2486     if (res->numberOfEntriesReturned)
2487         ZOOM_options_set_int(scan->options, "number",
2488                              *res->numberOfEntriesReturned);
2489     nmem_destroy(nmem);
2490     return 1;
2491 }
2492
2493 static zoom_ret send_sort(ZOOM_connection c,
2494                           ZOOM_resultset resultset)
2495 {
2496     if (c->error)
2497         resultset->r_sort_spec = 0;
2498     if (resultset->r_sort_spec)
2499     {
2500         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
2501         Z_SortRequest *req = apdu->u.sortRequest;
2502
2503         req->num_inputResultSetNames = 1;
2504         req->inputResultSetNames = (Z_InternationalString **)
2505             odr_malloc(c->odr_out, sizeof(*req->inputResultSetNames));
2506         req->inputResultSetNames[0] =
2507             odr_strdup(c->odr_out, resultset->setname);
2508         req->sortedResultSetName = odr_strdup(c->odr_out, resultset->setname);
2509         req->sortSequence = resultset->r_sort_spec;
2510         resultset->r_sort_spec = 0;
2511         return send_APDU(c, apdu);
2512     }
2513     return zoom_complete;
2514 }
2515
2516 static zoom_ret send_present(ZOOM_connection c)
2517 {
2518     Z_APDU *apdu = 0;
2519     Z_PresentRequest *req = 0;
2520     int i = 0;
2521     const char *syntax = 0;
2522     const char *elementSetName = 0;
2523     ZOOM_resultset  resultset;
2524     int *start, *count;
2525
2526     if (!c->tasks)
2527     {
2528         yaz_log(log_details, "%p send_present no tasks", c);
2529         return zoom_complete;
2530     }
2531
2532     switch (c->tasks->which)
2533     {
2534     case ZOOM_TASK_SEARCH:
2535         resultset = c->tasks->u.search.resultset;
2536         start = &c->tasks->u.search.start;
2537         count = &c->tasks->u.search.count;
2538         syntax = c->tasks->u.search.syntax;
2539         elementSetName = c->tasks->u.search.elementSetName;
2540         break;
2541     case ZOOM_TASK_RETRIEVE:
2542         resultset = c->tasks->u.retrieve.resultset;
2543         start = &c->tasks->u.retrieve.start;
2544         count = &c->tasks->u.retrieve.count;
2545         syntax = c->tasks->u.retrieve.syntax;
2546         elementSetName = c->tasks->u.retrieve.elementSetName;
2547         break;
2548     default:
2549         return zoom_complete;
2550     }
2551     yaz_log(log_details, "%p send_present start=%d count=%d",
2552             c, *start, *count);
2553
2554     if (*start < 0 || *count < 0 || *start + *count > resultset->size)
2555     {
2556         set_dset_error(c, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, "Bib-1",
2557                        "", 0);
2558     }
2559     if (c->error)                  /* don't continue on error */
2560         return zoom_complete;
2561     yaz_log(log_details, "send_present resultset=%p start=%d count=%d",
2562             resultset, *start, *count);
2563
2564     for (i = 0; i < *count; i++)
2565     {
2566         ZOOM_record rec =
2567             record_cache_lookup(resultset, i + *start, syntax, elementSetName);
2568         if (!rec)
2569             break;
2570         else
2571         {
2572             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
2573             ZOOM_connection_put_event(c, event);
2574         }
2575     }
2576     *start += i;
2577     *count -= i;
2578
2579     if (*count == 0)
2580     {
2581         yaz_log(log_details, "%p send_present skip=%d no more to fetch", c, i);
2582         return zoom_complete;
2583     }
2584
2585     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
2586     req = apdu->u.presentRequest;
2587
2588     if (i)
2589         yaz_log(log_details, "%p send_present skip=%d", c, i);
2590
2591     *req->resultSetStartPoint = *start + 1;
2592     *req->numberOfRecordsRequested = resultset->step>0 ?
2593         resultset->step : *count;
2594     if (*req->numberOfRecordsRequested + *start > resultset->size)
2595         *req->numberOfRecordsRequested = resultset->size - *start;
2596     assert(*req->numberOfRecordsRequested > 0);
2597
2598     if (syntax && *syntax)
2599         req->preferredRecordSyntax =
2600             zoom_yaz_str_to_z3950oid(c, CLASS_RECSYN, syntax);
2601
2602     if (resultset->schema && *resultset->schema)
2603     {
2604         Z_RecordComposition *compo = (Z_RecordComposition *)
2605             odr_malloc(c->odr_out, sizeof(*compo));
2606
2607         req->recordComposition = compo;
2608         compo->which = Z_RecordComp_complex;
2609         compo->u.complex = (Z_CompSpec *)
2610             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
2611         compo->u.complex->selectAlternativeSyntax = (bool_t *)
2612             odr_malloc(c->odr_out, sizeof(bool_t));
2613         *compo->u.complex->selectAlternativeSyntax = 0;
2614
2615         compo->u.complex->generic = (Z_Specification *)
2616             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
2617
2618         compo->u.complex->generic->which = Z_Schema_oid;
2619         compo->u.complex->generic->schema.oid = (Odr_oid *)
2620             zoom_yaz_str_to_z3950oid (c, CLASS_SCHEMA, resultset->schema);
2621
2622         if (!compo->u.complex->generic->schema.oid)
2623         {
2624             /* OID wasn't a schema! Try record syntax instead. */
2625
2626             compo->u.complex->generic->schema.oid = (Odr_oid *)
2627                 zoom_yaz_str_to_z3950oid (c, CLASS_RECSYN, resultset->schema);
2628         }
2629         if (elementSetName && *elementSetName)
2630         {
2631             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2632                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2633             compo->u.complex->generic->elementSpec->which =
2634                 Z_ElementSpec_elementSetName;
2635             compo->u.complex->generic->elementSpec->u.elementSetName =
2636                 odr_strdup(c->odr_out, elementSetName);
2637         }
2638         else
2639             compo->u.complex->generic->elementSpec = 0;
2640         compo->u.complex->num_dbSpecific = 0;
2641         compo->u.complex->dbSpecific = 0;
2642         compo->u.complex->num_recordSyntax = 0;
2643         compo->u.complex->recordSyntax = 0;
2644     }
2645     else if (elementSetName && *elementSetName)
2646     {
2647         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2648             odr_malloc(c->odr_out, sizeof(*esn));
2649         Z_RecordComposition *compo = (Z_RecordComposition *)
2650             odr_malloc(c->odr_out, sizeof(*compo));
2651
2652         esn->which = Z_ElementSetNames_generic;
2653         esn->u.generic = odr_strdup(c->odr_out, elementSetName);
2654         compo->which = Z_RecordComp_simple;
2655         compo->u.simple = esn;
2656         req->recordComposition = compo;
2657     }
2658     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2659     return send_APDU(c, apdu);
2660 }
2661
2662 ZOOM_API(ZOOM_scanset)
2663     ZOOM_connection_scan(ZOOM_connection c, const char *start)
2664 {
2665     ZOOM_scanset s;
2666     ZOOM_query q = ZOOM_query_create();
2667
2668     ZOOM_query_prefix(q, start);
2669
2670     s = ZOOM_connection_scan1(c, q);
2671     ZOOM_query_destroy(q);
2672     return s;
2673
2674 }
2675
2676 ZOOM_API(ZOOM_scanset)
2677     ZOOM_connection_scan1(ZOOM_connection c, ZOOM_query q)
2678 {
2679     char *start;
2680     char *freeme = 0;
2681     ZOOM_scanset scan = 0;
2682
2683     /*
2684      * We need to check the query-type, so we can recognise CQL and
2685      * CCL and compile them into a form that we can use here.  The
2686      * ZOOM_query structure has no explicit `type' member, but
2687      * inspection of the ZOOM_query_prefix() and ZOOM_query_cql()
2688      * functions shows how the structure is set up in each case.
2689      */
2690     if (!q->z_query)
2691         return 0;
2692     else if (q->z_query->which == Z_Query_type_1)
2693     {
2694         yaz_log(log_api, "%p ZOOM_connection_scan1 q=%p PQF '%s'",
2695                 c, q, q->query_string);
2696         start = q->query_string;
2697     }
2698     else if (q->z_query->which == Z_Query_type_104)
2699     {
2700         yaz_log(log_api, "%p ZOOM_connection_scan1 q=%p CQL '%s'",
2701                 c, q, q->query_string);
2702         start = freeme = cql2pqf(c, q->query_string);
2703         if (start == 0)
2704             return 0;
2705     }
2706     else
2707     {
2708         yaz_log(YLOG_FATAL, "%p ZOOM_connection_scan1 q=%p unknown type '%s'",
2709                 c, q, q->query_string);
2710         abort();
2711     }
2712
2713     scan = (ZOOM_scanset) xmalloc(sizeof(*scan));
2714     scan->connection = c;
2715     scan->odr = odr_createmem(ODR_DECODE);
2716     scan->options = ZOOM_options_create_with_parent(c->options);
2717     scan->refcount = 1;
2718     scan->scan_response = 0;
2719     scan->termListAndStartPoint =
2720         p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet, start);
2721     xfree(freeme);
2722
2723     scan->databaseNames = set_DatabaseNames(c, c->options,
2724                                             &scan->num_databaseNames,
2725                                             scan->odr);
2726     if (scan->termListAndStartPoint != 0)
2727     {
2728         ZOOM_task task = ZOOM_connection_add_task(c, ZOOM_TASK_SCAN);
2729         task->u.scan.scan = scan;
2730
2731         (scan->refcount)++;
2732         if (!c->async)
2733         {
2734             while (ZOOM_event(1, &c))
2735                 ;
2736         }
2737     }
2738     return scan;
2739 }
2740
2741 ZOOM_API(void)
2742     ZOOM_scanset_destroy(ZOOM_scanset scan)
2743 {
2744     if (!scan)
2745         return;
2746     (scan->refcount)--;
2747     if (scan->refcount == 0)
2748     {
2749         odr_destroy(scan->odr);
2750
2751         ZOOM_options_destroy(scan->options);
2752         xfree(scan);
2753     }
2754 }
2755
2756 static zoom_ret send_package(ZOOM_connection c)
2757 {
2758     ZOOM_Event event;
2759
2760     yaz_log(log_details, "%p send_package", c);
2761     if (!c->tasks)
2762         return zoom_complete;
2763     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2764
2765     event = ZOOM_Event_create(ZOOM_EVENT_SEND_APDU);
2766     ZOOM_connection_put_event(c, event);
2767
2768     c->buf_out = c->tasks->u.package->buf_out;
2769     c->len_out = c->tasks->u.package->len_out;
2770
2771     return do_write(c);
2772 }
2773
2774 static zoom_ret send_scan(ZOOM_connection c)
2775 {
2776     ZOOM_scanset scan;
2777     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2778     Z_ScanRequest *req = apdu->u.scanRequest;
2779
2780     yaz_log(log_details, "%p send_scan", c);
2781     if (!c->tasks)
2782         return zoom_complete;
2783     assert (c->tasks->which == ZOOM_TASK_SCAN);
2784     scan = c->tasks->u.scan.scan;
2785
2786     req->termListAndStartPoint = scan->termListAndStartPoint;
2787     req->attributeSet = scan->attributeSet;
2788
2789     *req->numberOfTermsRequested =
2790         ZOOM_options_get_int(scan->options, "number", 10);
2791
2792     req->preferredPositionInResponse =
2793         odr_intdup(c->odr_out,
2794                    ZOOM_options_get_int(scan->options, "position", 1));
2795
2796     req->stepSize =
2797         odr_intdup(c->odr_out,
2798                    ZOOM_options_get_int(scan->options, "stepSize", 0));
2799
2800     req->databaseNames = scan->databaseNames;
2801     req->num_databaseNames = scan->num_databaseNames;
2802
2803     return send_APDU(c, apdu);
2804 }
2805
2806 ZOOM_API(size_t)
2807     ZOOM_scanset_size(ZOOM_scanset scan)
2808 {
2809     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2810         return 0;
2811     return scan->scan_response->entries->num_entries;
2812 }
2813
2814 ZOOM_API(const char *)
2815     ZOOM_scanset_term(ZOOM_scanset scan, size_t pos,
2816                       int *occ, int *len)
2817 {
2818     const char *term = 0;
2819     size_t noent = ZOOM_scanset_size(scan);
2820     Z_ScanResponse *res = scan->scan_response;
2821
2822     *len = 0;
2823     *occ = 0;
2824     if (pos >= noent)
2825         return 0;
2826     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2827     {
2828         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2829
2830         if (t->term->which == Z_Term_general)
2831         {
2832             term = (const char *) t->term->u.general->buf;
2833             *len = t->term->u.general->len;
2834         }
2835         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2836     }
2837     return term;
2838 }
2839
2840 ZOOM_API(const char *)
2841     ZOOM_scanset_display_term(ZOOM_scanset scan, size_t pos,
2842                               int *occ, int *len)
2843 {
2844     const char *term = 0;
2845     size_t noent = ZOOM_scanset_size(scan);
2846     Z_ScanResponse *res = scan->scan_response;
2847
2848     *len = 0;
2849     *occ = 0;
2850     if (pos >= noent)
2851         return 0;
2852     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2853     {
2854         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2855
2856         if (t->displayTerm)
2857         {
2858             term = t->displayTerm;
2859             *len = strlen(term);
2860         }
2861         else if (t->term->which == Z_Term_general)
2862         {
2863             term = (const char *) t->term->u.general->buf;
2864             *len = t->term->u.general->len;
2865         }
2866         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2867     }
2868     return term;
2869 }
2870
2871 ZOOM_API(const char *)
2872     ZOOM_scanset_option_get(ZOOM_scanset scan, const char *key)
2873 {
2874     return ZOOM_options_get(scan->options, key);
2875 }
2876
2877 ZOOM_API(void)
2878     ZOOM_scanset_option_set(ZOOM_scanset scan, const char *key,
2879                             const char *val)
2880 {
2881     ZOOM_options_set(scan->options, key, val);
2882 }
2883
2884 static Z_APDU *create_es_package(ZOOM_package p, int type)
2885 {
2886     const char *str;
2887     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2888     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2889
2890     *req->function = Z_ExtendedServicesRequest_create;
2891
2892     str = ZOOM_options_get(p->options, "package-name");
2893     if (str && *str)
2894         req->packageName = nmem_strdup(p->odr_out->mem, str);
2895
2896     str = ZOOM_options_get(p->options, "user-id");
2897     if (str)
2898         req->userId = nmem_strdup(p->odr_out->mem, str);
2899
2900     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2901                                               type);
2902
2903     str = ZOOM_options_get(p->options, "function");
2904     if (str)
2905     {
2906         if (!strcmp (str, "create"))
2907             *req->function = 1;
2908         if (!strcmp (str, "delete"))
2909             *req->function = 2;
2910         if (!strcmp (str, "modify"))
2911             *req->function = 3;
2912     }
2913     return apdu;
2914 }
2915
2916 static const char *ill_array_lookup(void *clientData, const char *idx)
2917 {
2918     ZOOM_package p = (ZOOM_package) clientData;
2919     return ZOOM_options_get(p->options, idx+4);
2920 }
2921
2922 static Z_External *encode_ill_request(ZOOM_package p)
2923 {
2924     ODR out = p->odr_out;
2925     ILL_Request *req;
2926     Z_External *r = 0;
2927     struct ill_get_ctl ctl;
2928
2929     ctl.odr = p->odr_out;
2930     ctl.clientData = p;
2931     ctl.f = ill_array_lookup;
2932
2933     req = ill_get_ILLRequest(&ctl, "ill", 0);
2934
2935     if (!ill_Request(out, &req, 0, 0))
2936     {
2937         int ill_request_size;
2938         char *ill_request_buf = odr_getbuf(out, &ill_request_size, 0);
2939         if (ill_request_buf)
2940             odr_setbuf(out, ill_request_buf, ill_request_size, 1);
2941         return 0;
2942     }
2943     else
2944     {
2945         oident oid;
2946         int illRequest_size = 0;
2947         char *illRequest_buf = odr_getbuf(out, &illRequest_size, 0);
2948
2949         oid.proto = PROTO_GENERAL;
2950         oid.oclass = CLASS_GENERAL;
2951         oid.value = VAL_ISO_ILL_1;
2952
2953         r = (Z_External *) odr_malloc(out, sizeof(*r));
2954         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2955         r->indirect_reference = 0;
2956         r->descriptor = 0;
2957         r->which = Z_External_single;
2958
2959         r->u.single_ASN1_type =
2960             odr_create_Odr_oct(out,
2961                                (unsigned char *)illRequest_buf,
2962                                illRequest_size);
2963     }
2964     return r;
2965 }
2966
2967 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2968 {
2969     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc(p->odr_out, sizeof(*req));
2970     const char *str;
2971
2972     req->which = Z_IOItemOrder_esRequest;
2973     req->u.esRequest = (Z_IORequest *)
2974         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2975
2976     /* to keep part ... */
2977     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2978         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2979     req->u.esRequest->toKeep->supplDescription = 0;
2980     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2981         odr_malloc(p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2982
2983     str = ZOOM_options_get(p->options, "contact-name");
2984     req->u.esRequest->toKeep->contact->name = str ?
2985         nmem_strdup(p->odr_out->mem, str) : 0;
2986
2987     str = ZOOM_options_get(p->options, "contact-phone");
2988     req->u.esRequest->toKeep->contact->phone = str ?
2989         nmem_strdup(p->odr_out->mem, str) : 0;
2990
2991     str = ZOOM_options_get(p->options, "contact-email");
2992     req->u.esRequest->toKeep->contact->email = str ?
2993         nmem_strdup(p->odr_out->mem, str) : 0;
2994
2995     req->u.esRequest->toKeep->addlBilling = 0;
2996
2997     /* not to keep part ... */
2998     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2999         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
3000
3001     str = ZOOM_options_get(p->options, "itemorder-setname");
3002     if (!str)
3003         str = "default";
3004
3005     if (!*str)
3006         req->u.esRequest->notToKeep->resultSetItem = 0;
3007     else
3008     {
3009         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
3010             odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
3011
3012         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
3013             nmem_strdup(p->odr_out->mem, str);
3014         req->u.esRequest->notToKeep->resultSetItem->item =
3015             (int *) odr_malloc(p->odr_out, sizeof(int));
3016
3017         str = ZOOM_options_get(p->options, "itemorder-item");
3018         *req->u.esRequest->notToKeep->resultSetItem->item =
3019             (str ? atoi(str) : 1);
3020     }
3021
3022     str = ZOOM_options_get(p->options, "doc");
3023     if (str)
3024         req->u.esRequest->notToKeep->itemRequest =
3025             z_ext_record(p->odr_out, VAL_TEXT_XML, str, strlen(str));
3026     else
3027         req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
3028
3029     return req;
3030 }
3031
3032 Z_APDU *create_admin_package(ZOOM_package p, int type,
3033                              Z_ESAdminOriginPartToKeep **toKeepP,
3034                              Z_ESAdminOriginPartNotToKeep **notToKeepP)
3035 {
3036     Z_APDU *apdu = create_es_package(p, VAL_ADMINSERVICE);
3037     if (apdu)
3038     {
3039         Z_ESAdminOriginPartToKeep  *toKeep;
3040         Z_ESAdminOriginPartNotToKeep  *notToKeep;
3041         Z_External *r = (Z_External *) odr_malloc(p->odr_out, sizeof(*r));
3042         const char *first_db = "Default";
3043         int num_db;
3044         char **db = set_DatabaseNames(p->connection, p->options, &num_db,
3045                                       p->odr_out);
3046         if (num_db > 0)
3047             first_db = db[0];
3048
3049         r->direct_reference =
3050             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
3051                                    VAL_ADMINSERVICE);
3052         r->descriptor = 0;
3053         r->indirect_reference = 0;
3054         r->which = Z_External_ESAdmin;
3055
3056         r->u.adminService = (Z_Admin *)
3057             odr_malloc(p->odr_out, sizeof(*r->u.adminService));
3058         r->u.adminService->which = Z_Admin_esRequest;
3059         r->u.adminService->u.esRequest = (Z_AdminEsRequest *)
3060             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest));
3061
3062         toKeep = r->u.adminService->u.esRequest->toKeep =
3063             (Z_ESAdminOriginPartToKeep *)
3064             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest->toKeep));
3065         toKeep->which = type;
3066         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
3067         toKeep->u.create = odr_nullval();
3068         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
3069
3070         r->u.adminService->u.esRequest->notToKeep = notToKeep =
3071             (Z_ESAdminOriginPartNotToKeep *)
3072             odr_malloc(p->odr_out,
3073                        sizeof(*r->u.adminService->u.esRequest->notToKeep));
3074         notToKeep->which = Z_ESAdminOriginPartNotToKeep_recordsWillFollow;
3075         notToKeep->u.recordsWillFollow = odr_nullval();
3076         if (toKeepP)
3077             *toKeepP = toKeep;
3078         if (notToKeepP)
3079             *notToKeepP = notToKeep;
3080     }
3081     return apdu;
3082 }
3083
3084 static Z_APDU *create_xmlupdate_package(ZOOM_package p)
3085 {
3086     Z_APDU *apdu = create_es_package(p, VAL_XMLES);
3087     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
3088     Z_External *ext = (Z_External *) odr_malloc(p->odr_out, sizeof(*ext));
3089     const char *doc = ZOOM_options_get(p->options, "doc");
3090
3091     if (!doc)
3092         doc = "";
3093
3094     req->taskSpecificParameters = ext;
3095     ext->direct_reference = req->packageType;
3096     ext->descriptor = 0;
3097     ext->indirect_reference = 0;
3098
3099     ext->which = Z_External_octet;
3100     ext->u.single_ASN1_type =
3101         odr_create_Odr_oct(p->odr_out, (const unsigned char *) doc,
3102                            strlen(doc));
3103     return apdu;
3104 }
3105
3106 static Z_APDU *create_update_package(ZOOM_package p)
3107 {
3108     Z_APDU *apdu = 0;
3109     const char *first_db = "Default";
3110     int num_db;
3111     char **db = set_DatabaseNames(p->connection, p->options, &num_db, p->odr_out);
3112     const char *action = ZOOM_options_get(p->options, "action");
3113     const char *recordIdOpaque = ZOOM_options_get(p->options, "recordIdOpaque");
3114     const char *recordIdNumber = ZOOM_options_get(p->options, "recordIdNumber");
3115     const char *record_buf = ZOOM_options_get(p->options, "record");
3116     const char *syntax_str = ZOOM_options_get(p->options, "syntax");
3117     int syntax_oid = VAL_NONE;
3118     int action_no = -1;
3119
3120     if (syntax_str)
3121         syntax_oid = oid_getvalbyname(syntax_str);
3122     if (!record_buf)
3123     {
3124         record_buf = "void";
3125         syntax_oid = VAL_SUTRS;
3126     }
3127     if (syntax_oid == VAL_NONE)
3128         syntax_oid = VAL_TEXT_XML;
3129
3130     if (num_db > 0)
3131         first_db = db[0];
3132
3133     if (!action)
3134         action = "specialUpdate";
3135
3136     if (!strcmp(action, "recordInsert"))
3137         action_no = Z_IUOriginPartToKeep_recordInsert;
3138     else if (!strcmp(action, "recordReplace"))
3139         action_no = Z_IUOriginPartToKeep_recordReplace;
3140     else if (!strcmp(action, "recordDelete"))
3141         action_no = Z_IUOriginPartToKeep_recordDelete;
3142     else if (!strcmp(action, "elementUpdate"))
3143         action_no = Z_IUOriginPartToKeep_elementUpdate;
3144     else if (!strcmp(action, "specialUpdate"))
3145         action_no = Z_IUOriginPartToKeep_specialUpdate;
3146     else
3147         return 0;
3148
3149     apdu = create_es_package(p, VAL_DBUPDATE);
3150     if (apdu)
3151     {
3152         Z_IUOriginPartToKeep *toKeep;
3153         Z_IUSuppliedRecords *notToKeep;
3154         Z_External *r = (Z_External *)
3155             odr_malloc(p->odr_out, sizeof(*r));
3156
3157         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
3158
3159         r->direct_reference =
3160             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
3161                                    VAL_DBUPDATE);
3162         r->descriptor = 0;
3163         r->which = Z_External_update;
3164         r->indirect_reference = 0;
3165         r->u.update = (Z_IUUpdate *)
3166             odr_malloc(p->odr_out, sizeof(*r->u.update));
3167
3168         r->u.update->which = Z_IUUpdate_esRequest;
3169         r->u.update->u.esRequest = (Z_IUUpdateEsRequest *)
3170             odr_malloc(p->odr_out, sizeof(*r->u.update->u.esRequest));
3171         toKeep = r->u.update->u.esRequest->toKeep =
3172             (Z_IUOriginPartToKeep *)
3173             odr_malloc(p->odr_out, sizeof(*toKeep));
3174
3175         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
3176         toKeep->schema = 0;
3177         toKeep->elementSetName = 0;
3178         toKeep->actionQualifier = 0;
3179         toKeep->action = odr_intdup(p->odr_out, action_no);
3180
3181         notToKeep = r->u.update->u.esRequest->notToKeep =
3182             (Z_IUSuppliedRecords *)
3183             odr_malloc(p->odr_out, sizeof(*notToKeep));
3184         notToKeep->num = 1;
3185         notToKeep->elements = (Z_IUSuppliedRecords_elem **)
3186             odr_malloc(p->odr_out, sizeof(*notToKeep->elements));
3187         notToKeep->elements[0] = (Z_IUSuppliedRecords_elem *)
3188             odr_malloc(p->odr_out, sizeof(**notToKeep->elements));
3189         notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_opaque;
3190         if (recordIdOpaque)
3191         {
3192             notToKeep->elements[0]->u.opaque =
3193                 odr_create_Odr_oct(p->odr_out,
3194                                    (const unsigned char *) recordIdOpaque,
3195                                    strlen(recordIdOpaque));
3196         }
3197         else if (recordIdNumber)
3198         {
3199             notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_number;
3200
3201             notToKeep->elements[0]->u.number =
3202                 odr_intdup(p->odr_out, atoi(recordIdNumber));
3203         }
3204         else
3205             notToKeep->elements[0]->u.opaque = 0;
3206         notToKeep->elements[0]->supplementalId = 0;
3207         notToKeep->elements[0]->correlationInfo = 0;
3208         notToKeep->elements[0]->record =
3209             z_ext_record(p->odr_out, syntax_oid,
3210                          record_buf, strlen(record_buf));
3211     }
3212     if (0 && apdu)
3213     {
3214         ODR print = odr_createmem(ODR_PRINT);
3215
3216         z_APDU(print, &apdu, 0, 0);
3217         odr_destroy(print);
3218     }
3219     return apdu;
3220 }
3221
3222 ZOOM_API(void)
3223     ZOOM_package_send(ZOOM_package p, const char *type)
3224 {
3225     Z_APDU *apdu = 0;
3226     ZOOM_connection c;
3227     if (!p)
3228         return;
3229     c = p->connection;
3230     odr_reset(p->odr_out);
3231     xfree(p->buf_out);
3232     p->buf_out = 0;
3233     if (!strcmp(type, "itemorder"))
3234     {
3235         apdu = create_es_package(p, VAL_ITEMORDER);
3236         if (apdu)
3237         {
3238             Z_External *r = (Z_External *) odr_malloc(p->odr_out, sizeof(*r));
3239
3240             r->direct_reference =
3241                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
3242                                        VAL_ITEMORDER);
3243             r->descriptor = 0;
3244             r->which = Z_External_itemOrder;
3245             r->indirect_reference = 0;
3246             r->u.itemOrder = encode_item_order(p);
3247
3248             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
3249         }
3250     }
3251     else if (!strcmp(type, "create"))  /* create database */
3252     {
3253         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_create,
3254                                     0, 0);
3255     }
3256     else if (!strcmp(type, "drop"))  /* drop database */
3257     {
3258         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_drop,
3259                                     0, 0);
3260     }
3261     else if (!strcmp(type, "commit"))  /* commit changes */
3262     {
3263         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_commit,
3264                                     0, 0);
3265     }
3266     else if (!strcmp(type, "update")) /* update record(s) */
3267     {
3268         apdu = create_update_package(p);
3269     }
3270     else if (!strcmp(type, "xmlupdate"))
3271     {
3272         apdu = create_xmlupdate_package(p);
3273     }
3274     if (apdu)
3275     {
3276         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
3277         {
3278             char *buf;
3279
3280             ZOOM_task task = ZOOM_connection_add_task(c, ZOOM_TASK_PACKAGE);
3281             task->u.package = p;
3282             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
3283             p->buf_out = (char *) xmalloc(p->len_out);
3284             memcpy(p->buf_out, buf, p->len_out);
3285
3286             (p->refcount)++;
3287             if (!c->async)
3288             {
3289                 while (ZOOM_event(1, &c))
3290                     ;
3291             }
3292         }
3293     }
3294 }
3295
3296 ZOOM_API(ZOOM_package)
3297     ZOOM_connection_package(ZOOM_connection c, ZOOM_options options)
3298 {
3299     ZOOM_package p = (ZOOM_package) xmalloc(sizeof(*p));
3300
3301     p->connection = c;
3302     p->odr_out = odr_createmem(ODR_ENCODE);
3303     p->options = ZOOM_options_create_with_parent2(options, c->options);
3304     p->refcount = 1;
3305     p->buf_out = 0;
3306     p->len_out = 0;
3307     return p;
3308 }
3309
3310 ZOOM_API(void)
3311     ZOOM_package_destroy(ZOOM_package p)
3312 {
3313     if (!p)
3314         return;
3315     (p->refcount)--;
3316     if (p->refcount == 0)
3317     {
3318         odr_destroy(p->odr_out);
3319         xfree(p->buf_out);
3320
3321         ZOOM_options_destroy(p->options);
3322         xfree(p);
3323     }
3324 }
3325
3326 ZOOM_API(const char *)
3327     ZOOM_package_option_get(ZOOM_package p, const char *key)
3328 {
3329     return ZOOM_options_get(p->options, key);
3330 }
3331
3332
3333 ZOOM_API(void)
3334     ZOOM_package_option_set(ZOOM_package p, const char *key,
3335                             const char *val)
3336 {
3337     ZOOM_options_set(p->options, key, val);
3338 }
3339
3340 static int ZOOM_connection_exec_task(ZOOM_connection c)
3341 {
3342     ZOOM_task task = c->tasks;
3343     zoom_ret ret = zoom_complete;
3344
3345     if (!task)
3346         return 0;
3347     yaz_log(log_details, "%p ZOOM_connection_exec_task type=%d run=%d",
3348             c, task->which, task->running);
3349     if (c->error != ZOOM_ERROR_NONE)
3350     {
3351         yaz_log(log_details, "%p ZOOM_connection_exec_task "
3352                 "removing tasks because of error = %d", c, c->error);
3353         ZOOM_connection_remove_tasks(c);
3354         return 0;
3355     }
3356     if (task->running)
3357     {
3358         yaz_log(log_details, "%p ZOOM_connection_exec_task "
3359                 "task already running", c);
3360         return 0;
3361     }
3362     task->running = 1;
3363     ret = zoom_complete;
3364     if (c->cs || task->which == ZOOM_TASK_CONNECT)
3365     {
3366         switch (task->which)
3367         {
3368         case ZOOM_TASK_SEARCH:
3369             if (c->proto == PROTO_HTTP)
3370                 ret = ZOOM_connection_srw_send_search(c);
3371             else
3372                 ret = ZOOM_connection_send_search(c);
3373             break;
3374         case ZOOM_TASK_RETRIEVE:
3375             if (c->proto == PROTO_HTTP)
3376                 ret = ZOOM_connection_srw_send_search(c);
3377             else
3378                 ret = send_present(c);
3379             break;
3380         case ZOOM_TASK_CONNECT:
3381             ret = do_connect(c);
3382             break;
3383         case ZOOM_TASK_SCAN:
3384             ret = send_scan(c);
3385             break;
3386         case ZOOM_TASK_PACKAGE:
3387             ret = send_package(c);
3388             break;
3389         case ZOOM_TASK_SORT:
3390             c->tasks->u.sort.resultset->r_sort_spec =
3391                 c->tasks->u.sort.q->sort_spec;
3392             ret = send_sort(c, c->tasks->u.sort.resultset);
3393             break;
3394         }
3395     }
3396     else
3397     {
3398         yaz_log(log_details, "%p ZOOM_connection_exec_task "
3399                 "remove tasks because no connection exist", c);
3400         ZOOM_connection_remove_tasks(c);
3401     }
3402     if (ret == zoom_complete)
3403     {
3404         yaz_log(log_details, "%p ZOOM_connection_exec_task "
3405                 "task removed (complete)", c);
3406         ZOOM_connection_remove_task(c);
3407         return 0;
3408     }
3409     yaz_log(log_details, "%p ZOOM_connection_exec_task "
3410             "task pending", c);
3411     return 1;
3412 }
3413
3414 static zoom_ret send_sort_present(ZOOM_connection c)
3415 {
3416     zoom_ret r = zoom_complete;
3417
3418     if (c->tasks && c->tasks->which == ZOOM_TASK_SEARCH)
3419         r = send_sort(c, c->tasks->u.search.resultset);
3420     if (r == zoom_complete)
3421         r = send_present(c);
3422     return r;
3423 }
3424
3425 static int es_response(ZOOM_connection c,
3426                        Z_ExtendedServicesResponse *res)
3427 {
3428     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
3429         return 0;
3430     if (res->diagnostics && res->num_diagnostics > 0)
3431         response_diag(c, res->diagnostics[0]);
3432     if (res->taskPackage &&
3433         res->taskPackage->which == Z_External_extendedService)
3434     {
3435         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
3436         Odr_oct *id = taskPackage->targetReference;
3437
3438         if (id)
3439             ZOOM_options_setl(c->tasks->u.package->options,
3440                               "targetReference", (char*) id->buf, id->len);
3441     }
3442     if (res->taskPackage &&
3443         res->taskPackage->which == Z_External_octet)
3444     {
3445         Odr_oct *doc = res->taskPackage->u.octet_aligned;
3446         ZOOM_options_setl(c->tasks->u.package->options,
3447                           "xmlUpdateDoc", (char*) doc->buf, doc->len);
3448     }
3449     return 1;
3450 }
3451
3452 static void interpret_init_diag(ZOOM_connection c,
3453                                 Z_DiagnosticFormat *diag)
3454 {
3455     if (diag->num > 0)
3456     {
3457         Z_DiagnosticFormat_s *ds = diag->elements[0];
3458         if (ds->which == Z_DiagnosticFormat_s_defaultDiagRec)
3459             response_default_diag(c, ds->u.defaultDiagRec);
3460     }
3461 }
3462
3463
3464 static void interpret_otherinformation_field(ZOOM_connection c,
3465                                              Z_OtherInformation *ui)
3466 {
3467     int i;
3468     for (i = 0; i < ui->num_elements; i++)
3469     {
3470         Z_OtherInformationUnit *unit = ui->list[i];
3471         if (unit->which == Z_OtherInfo_externallyDefinedInfo &&
3472             unit->information.externallyDefinedInfo &&
3473             unit->information.externallyDefinedInfo->which ==
3474             Z_External_diag1)
3475         {
3476             interpret_init_diag(c, unit->information.externallyDefinedInfo->u.diag1);
3477         }
3478     }
3479 }
3480
3481
3482 static void set_init_option(const char *name, void *clientData) {
3483     ZOOM_connection c = clientData;
3484     char buf[80];
3485
3486     sprintf(buf, "init_opt_%.70s", name);
3487     ZOOM_connection_option_set(c, buf, "1");
3488 }
3489
3490
3491 static void recv_apdu(ZOOM_connection c, Z_APDU *apdu)
3492 {
3493     Z_InitResponse *initrs;
3494
3495     ZOOM_connection_set_mask(c, 0);
3496     yaz_log(log_details, "%p recv_apdu apdu->which=%d", c, apdu->which);
3497     switch(apdu->which)
3498     {
3499     case Z_APDU_initResponse:
3500         yaz_log(log_api, "%p recv_apd: Received Init response", c);
3501         initrs = apdu->u.initResponse;
3502         ZOOM_connection_option_set(c, "serverImplementationId",
3503                                    initrs->implementationId ?
3504                                    initrs->implementationId : "");
3505         ZOOM_connection_option_set(c, "serverImplementationName",
3506                                    initrs->implementationName ?
3507                                    initrs->implementationName : "");
3508         ZOOM_connection_option_set(c, "serverImplementationVersion",
3509                                    initrs->implementationVersion ?
3510                                    initrs->implementationVersion : "");
3511         /* Set the three old options too, for old applications */
3512         ZOOM_connection_option_set(c, "targetImplementationId",
3513                                    initrs->implementationId ?
3514                                    initrs->implementationId : "");
3515         ZOOM_connection_option_set(c, "targetImplementationName",
3516                                    initrs->implementationName ?
3517                                    initrs->implementationName : "");
3518         ZOOM_connection_option_set(c, "targetImplementationVersion",
3519                                    initrs->implementationVersion ?
3520                                    initrs->implementationVersion : "");
3521
3522         /* Make initrs->options available as ZOOM-level options */
3523         yaz_init_opt_decode(initrs->options, set_init_option, (void*) c);
3524
3525         if (!*initrs->result)
3526         {
3527             Z_External *uif = initrs->userInformationField;
3528
3529             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0); /* default error */
3530
3531             if (uif && uif->which == Z_External_userInfo1)
3532                 interpret_otherinformation_field(c, uif->u.userInfo1);
3533         }
3534         else
3535         {
3536             char *cookie =
3537                 yaz_oi_get_string_oidval(&apdu->u.initResponse->otherInfo,
3538                                          VAL_COOKIE, 1, 0);
3539             xfree(c->cookie_in);
3540             c->cookie_in = 0;
3541             if (cookie)
3542                 c->cookie_in = xstrdup(cookie);
3543             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
3544                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
3545                 c->support_named_resultsets = 1;
3546             if (c->tasks)
3547             {
3548                 assert(c->tasks->which == ZOOM_TASK_CONNECT);
3549                 ZOOM_connection_remove_task(c);
3550             }
3551             ZOOM_connection_exec_task(c);
3552         }
3553         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
3554         {
3555             NMEM tmpmem = nmem_create();
3556             Z_CharSetandLanguageNegotiation *p =
3557                 yaz_get_charneg_record(initrs->otherInfo);
3558
3559             if (p)
3560             {
3561                 char *charset = NULL, *lang = NULL;
3562                 int sel;
3563
3564                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
3565                 yaz_log(log_details, "%p recv_apdu target accepted: "
3566                         "charset %s, language %s, select %d",
3567                         c,
3568                         charset ? charset : "none", lang ? lang : "none", sel);
3569                 if (charset)
3570                     ZOOM_connection_option_set(c, "negotiation-charset",
3571                                                charset);
3572                 if (lang)
3573                     ZOOM_connection_option_set(c, "negotiation-lang",
3574                                                lang);
3575
3576                 ZOOM_connection_option_set(
3577                     c,  "negotiation-charset-in-effect-for-records",
3578                     (sel != 0) ? "1" : "0");
3579                 nmem_destroy(tmpmem);
3580             }
3581         }
3582         break;
3583     case Z_APDU_searchResponse:
3584         yaz_log(log_api, "%p recv_apdu Search response", c);
3585         handle_search_response(c, apdu->u.searchResponse);
3586         if (send_sort_present(c) == zoom_complete)
3587             ZOOM_connection_remove_task(c);
3588         break;
3589     case Z_APDU_presentResponse:
3590         yaz_log(log_api, "%p recv_apdu Present response", c);
3591         handle_present_response(c, apdu->u.presentResponse);
3592         if (send_present(c) == zoom_complete)
3593             ZOOM_connection_remove_task(c);
3594         break;
3595     case Z_APDU_sortResponse:
3596         yaz_log(log_api, "%p recv_apdu Sort response", c);
3597         sort_response(c, apdu->u.sortResponse);
3598         if (send_present(c) == zoom_complete)
3599             ZOOM_connection_remove_task(c);
3600         break;
3601     case Z_APDU_scanResponse:
3602         yaz_log(log_api, "%p recv_apdu Scan response", c);
3603         scan_response(c, apdu->u.scanResponse);
3604         ZOOM_connection_remove_task(c);
3605         break;
3606     case Z_APDU_extendedServicesResponse:
3607         yaz_log(log_api, "%p recv_apdu Extended Services response", c);
3608         es_response(c, apdu->u.extendedServicesResponse);
3609         ZOOM_connection_remove_task(c);
3610         break;
3611     case Z_APDU_close:
3612         yaz_log(log_api, "%p recv_apdu Close PDU", c);
3613         if (!ZOOM_test_reconnect(c))
3614         {
3615             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, c->host_port);
3616             do_close(c);
3617         }
3618         break;
3619     default:
3620         yaz_log(log_api, "%p Received unknown PDU", c);
3621         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3622         do_close(c);
3623     }
3624 }
3625
3626 #if YAZ_HAVE_XML2
3627 static void handle_srw_response(ZOOM_connection c,
3628                                 Z_SRW_searchRetrieveResponse *res)
3629 {
3630     ZOOM_resultset resultset = 0;
3631     int i;
3632     NMEM nmem;
3633     ZOOM_Event event;
3634     int *start;
3635     const char *syntax, *elementSetName;
3636
3637     if (!c->tasks)
3638         return;
3639
3640     switch(c->tasks->which)
3641     {
3642     case ZOOM_TASK_SEARCH:
3643         resultset = c->tasks->u.search.resultset;
3644         start = &c->tasks->u.search.start;
3645         syntax = c->tasks->u.search.syntax;
3646         elementSetName = c->tasks->u.search.elementSetName;
3647         break;
3648     case ZOOM_TASK_RETRIEVE:
3649         resultset = c->tasks->u.retrieve.resultset;
3650         start = &c->tasks->u.retrieve.start;
3651         syntax = c->tasks->u.retrieve.syntax;
3652         elementSetName = c->tasks->u.retrieve.elementSetName;
3653         break;
3654     default:
3655         return;
3656     }
3657     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
3658     ZOOM_connection_put_event(c, event);
3659
3660     resultset->size = 0;
3661
3662     yaz_log(log_details, "%p handle_srw_response got SRW response OK", c);
3663
3664     if (res->numberOfRecords)
3665         resultset->size = *res->numberOfRecords;
3666
3667     for (i = 0; i<res->num_records; i++)
3668     {
3669         int pos;
3670
3671         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
3672             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
3673
3674         if (res->records[i].recordPosition &&
3675             *res->records[i].recordPosition > 0)
3676             pos = *res->records[i].recordPosition - 1;
3677         else
3678             pos = *start + i;
3679
3680         npr->databaseName = 0;
3681         npr->which = Z_NamePlusRecord_databaseRecord;
3682         npr->u.databaseRecord = (Z_External *)
3683             odr_malloc(c->odr_in, sizeof(Z_External));
3684         npr->u.databaseRecord->descriptor = 0;
3685         npr->u.databaseRecord->direct_reference =
3686             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
3687         npr->u.databaseRecord->which = Z_External_octet;
3688
3689         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
3690             odr_malloc(c->odr_in, sizeof(Odr_oct));
3691         npr->u.databaseRecord->u.octet_aligned->buf = (unsigned char*)
3692             res->records[i].recordData_buf;
3693         npr->u.databaseRecord->u.octet_aligned->len =
3694             npr->u.databaseRecord->u.octet_aligned->size =
3695             res->records[i].recordData_len;
3696         record_cache_add(resultset, npr, pos, syntax, elementSetName);
3697     }
3698     if (res->num_diagnostics > 0)
3699     {
3700         const char *uri = res->diagnostics[0].uri;
3701         if (uri)
3702         {
3703             int code = 0;
3704             const char *cp;
3705             if ((cp = strrchr(uri, '/')))
3706                 code = atoi(cp+1);
3707             set_dset_error(c, code, uri,
3708                            res->diagnostics[0].details, 0);
3709         }
3710     }
3711     nmem = odr_extract_mem(c->odr_in);
3712     nmem_transfer(resultset->odr->mem, nmem);
3713     nmem_destroy(nmem);
3714 }
3715 #endif
3716
3717 #if YAZ_HAVE_XML2
3718 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
3719 {
3720     int ret = -1;
3721     const char *content_type = z_HTTP_header_lookup(hres->headers,
3722                                                     "Content-Type");
3723     const char *connection_head = z_HTTP_header_lookup(hres->headers,
3724                                                        "Connection");
3725     ZOOM_connection_set_mask(c, 0);
3726     yaz_log(log_details, "%p handle_http", c);
3727
3728     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
3729     {
3730         Z_SOAP *soap_package = 0;
3731         ODR o = c->odr_in;
3732         Z_SOAP_Handler soap_handlers[2] = {
3733             {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
3734             {0, 0, 0}
3735         };
3736         ret = z_soap_codec(o, &soap_package,
3737                            &hres->content_buf, &hres->content_len,
3738                            soap_handlers);
3739         if (!ret && soap_package->which == Z_SOAP_generic &&
3740             soap_package->u.generic->no == 0)
3741         {
3742             Z_SRW_PDU *sr = (Z_SRW_PDU*) soap_package->u.generic->p;
3743             if (sr->which == Z_SRW_searchRetrieve_response)
3744                 handle_srw_response(c, sr->u.response);
3745             else
3746                 ret = -1;
3747         }
3748         else if (!ret && (soap_package->which == Z_SOAP_fault
3749                           || soap_package->which == Z_SOAP_error))
3750         {
3751             set_HTTP_error(c, hres->code,
3752                            soap_package->u.fault->fault_code,
3753                            soap_package->u.fault->fault_string);
3754         }
3755         else
3756             ret = -1;
3757     }
3758     if (ret)
3759     {
3760         if (hres->code != 200)
3761             set_HTTP_error(c, hres->code, 0, 0);
3762         else
3763             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3764         do_close(c);
3765     }
3766     ZOOM_connection_remove_task(c);
3767     if (!strcmp(hres->version, "1.0"))
3768     {
3769         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
3770         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
3771             do_close(c);
3772     }
3773     else
3774     {
3775         /* HTTP 1.1: only if no close we stay alive .. */
3776         if (connection_head && !strcmp(connection_head, "close"))
3777             do_close(c);
3778     }
3779 }
3780 #endif
3781
3782 static int do_read(ZOOM_connection c)
3783 {
3784     int r, more;
3785     ZOOM_Event event;
3786
3787     event = ZOOM_Event_create(ZOOM_EVENT_RECV_DATA);
3788     ZOOM_connection_put_event(c, event);
3789
3790     r = cs_get(c->cs, &c->buf_in, &c->len_in);
3791     more = cs_more(c->cs);
3792     yaz_log(log_details, "%p do_read len=%d more=%d", c, r, more);
3793     if (r == 1)
3794         return 0;
3795     if (r <= 0)
3796     {
3797         if (!ZOOM_test_reconnect(c))
3798         {
3799             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, c->host_port);
3800             do_close(c);
3801         }
3802     }
3803     else
3804     {
3805         Z_GDU *gdu;
3806         ZOOM_Event event;
3807
3808         odr_reset(c->odr_in);
3809         odr_setbuf(c->odr_in, c->buf_in, r, 0);
3810         event = ZOOM_Event_create(ZOOM_EVENT_RECV_APDU);
3811         ZOOM_connection_put_event(c, event);
3812
3813         if (!z_GDU(c->odr_in, &gdu, 0, 0))
3814         {
3815             int x;
3816             int err = odr_geterrorx(c->odr_in, &x);
3817             char msg[60];
3818             const char *element = odr_getelement(c->odr_in);
3819             sprintf(msg, "ODR code %d:%d element=%-20s",
3820                     err, x, element ? element : "<unknown>");
3821             set_ZOOM_error(c, ZOOM_ERROR_DECODE, msg);
3822             do_close(c);
3823         }
3824         else if (gdu->which == Z_GDU_Z3950)
3825             recv_apdu(c, gdu->u.z3950);
3826         else if (gdu->which == Z_GDU_HTTP_Response)
3827         {
3828 #if YAZ_HAVE_XML2
3829             handle_http(c, gdu->u.HTTP_Response);
3830 #else
3831             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3832             do_close(c);
3833 #endif
3834         }
3835         c->reconnect_ok = 0;
3836     }
3837     return 1;
3838 }
3839
3840 static zoom_ret do_write_ex(ZOOM_connection c, char *buf_out, int len_out)
3841 {
3842     int r;
3843     ZOOM_Event event;
3844
3845     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
3846     ZOOM_connection_put_event(c, event);
3847
3848     yaz_log(log_details, "%p do_write_ex len=%d", c, len_out);
3849     if ((r = cs_put(c->cs, buf_out, len_out)) < 0)
3850     {
3851         yaz_log(log_details, "%p do_write_ex write failed", c);
3852         if (ZOOM_test_reconnect(c))
3853         {
3854             return zoom_pending;
3855         }
3856         if (c->state == STATE_CONNECTING)
3857             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, c->host_port);
3858         else
3859             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, c->host_port);
3860         do_close(c);
3861         return zoom_complete;
3862     }
3863     else if (r == 1)
3864     {
3865         int mask = ZOOM_SELECT_EXCEPT;
3866         if (c->cs->io_pending & CS_WANT_WRITE)
3867             mask += ZOOM_SELECT_WRITE;
3868         if (c->cs->io_pending & CS_WANT_READ)
3869             mask += ZOOM_SELECT_READ;
3870         ZOOM_connection_set_mask(c, mask);
3871         yaz_log(log_details, "%p do_write_ex write incomplete mask=%d",
3872                 c, c->mask);
3873     }
3874     else
3875     {
3876         ZOOM_connection_set_mask(c, ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT);
3877         yaz_log(log_details, "%p do_write_ex write complete mask=%d",
3878                 c, c->mask);
3879     }
3880     return zoom_pending;
3881 }
3882
3883 static zoom_ret do_write(ZOOM_connection c)
3884 {
3885     return do_write_ex(c, c->buf_out, c->len_out);
3886 }
3887
3888
3889 ZOOM_API(const char *)
3890     ZOOM_connection_option_get(ZOOM_connection c, const char *key)
3891 {
3892     return ZOOM_options_get(c->options, key);
3893 }
3894
3895 ZOOM_API(const char *)
3896     ZOOM_connection_option_getl(ZOOM_connection c, const char *key, int *lenp)
3897 {
3898     return ZOOM_options_getl(c->options, key, lenp);
3899 }
3900
3901 ZOOM_API(void)
3902     ZOOM_connection_option_set(ZOOM_connection c, const char *key,
3903                                const char *val)
3904 {
3905     ZOOM_options_set(c->options, key, val);
3906 }
3907
3908 ZOOM_API(void)
3909     ZOOM_connection_option_setl(ZOOM_connection c, const char *key,
3910                                 const char *val, int len)
3911 {
3912     ZOOM_options_setl(c->options, key, val, len);
3913 }
3914
3915 ZOOM_API(const char *)
3916     ZOOM_resultset_option_get(ZOOM_resultset r, const char *key)
3917 {
3918     return ZOOM_options_get(r->options, key);
3919 }
3920
3921 ZOOM_API(void)
3922     ZOOM_resultset_option_set(ZOOM_resultset r, const char *key,
3923                               const char *val)
3924 {
3925     ZOOM_options_set(r->options, key, val);
3926 }
3927
3928
3929 ZOOM_API(int)
3930     ZOOM_connection_errcode(ZOOM_connection c)
3931 {
3932     return ZOOM_connection_error(c, 0, 0);
3933 }
3934
3935 ZOOM_API(const char *)
3936     ZOOM_connection_errmsg(ZOOM_connection c)
3937 {
3938     const char *msg;
3939     ZOOM_connection_error(c, &msg, 0);
3940     return msg;
3941 }
3942
3943 ZOOM_API(const char *)
3944     ZOOM_connection_addinfo(ZOOM_connection c)
3945 {
3946     const char *addinfo;
3947     ZOOM_connection_error(c, 0, &addinfo);
3948     return addinfo;
3949 }
3950
3951 ZOOM_API(const char *)
3952     ZOOM_connection_diagset(ZOOM_connection c)
3953 {
3954     const char *diagset;
3955     ZOOM_connection_error_x(c, 0, 0, &diagset);
3956     return diagset;
3957 }
3958
3959 ZOOM_API(const char *)
3960     ZOOM_diag_str(int error)
3961 {
3962     switch (error)
3963     {
3964     case ZOOM_ERROR_NONE:
3965         return "No error";
3966     case ZOOM_ERROR_CONNECT:
3967         return "Connect failed";
3968     case ZOOM_ERROR_MEMORY:
3969         return "Out of memory";
3970     case ZOOM_ERROR_ENCODE:
3971         return "Encoding failed";
3972     case ZOOM_ERROR_DECODE:
3973         return "Decoding failed";
3974     case ZOOM_ERROR_CONNECTION_LOST:
3975         return "Connection lost";
3976     case ZOOM_ERROR_INIT:
3977         return "Init rejected";
3978     case ZOOM_ERROR_INTERNAL:
3979         return "Internal failure";
3980     case ZOOM_ERROR_TIMEOUT:
3981         return "Timeout";
3982     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
3983         return "Unsupported protocol";
3984     case ZOOM_ERROR_UNSUPPORTED_QUERY:
3985         return "Unsupported query type";
3986     case ZOOM_ERROR_INVALID_QUERY:
3987         return "Invalid query";
3988     case ZOOM_ERROR_CQL_PARSE:
3989         return "CQL parsing error";
3990     case ZOOM_ERROR_CQL_TRANSFORM:
3991         return "CQL transformation error";
3992     case ZOOM_ERROR_CCL_CONFIG:
3993         return "CCL configuration error";
3994     case ZOOM_ERROR_CCL_PARSE:
3995         return "CCL parsing error";
3996     default:
3997         return diagbib1_str(error);
3998     }
3999 }
4000
4001 ZOOM_API(int)
4002     ZOOM_connection_error_x(ZOOM_connection c, const char **cp,
4003                             const char **addinfo, const char **diagset)
4004 {
4005     int error = c->error;
4006     if (cp)
4007     {
4008         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
4009             *cp = ZOOM_diag_str(error);
4010         else if (!strcmp(c->diagset, "HTTP"))
4011             *cp = z_HTTP_errmsg(c->error);
4012         else if (!strcmp(c->diagset, "Bib-1"))
4013             *cp = ZOOM_diag_str(error);
4014         else if (!strcmp(c->diagset, "info:srw/diagnostic/1"))
4015             *cp = yaz_diag_srw_str(c->error);
4016         else
4017             *cp = "Unknown error and diagnostic set";
4018     }
4019     if (addinfo)
4020         *addinfo = c->addinfo ? c->addinfo : "";
4021     if (diagset)
4022         *diagset = c->diagset ? c->diagset : "";
4023     return c->error;
4024 }
4025
4026 ZOOM_API(int)
4027     ZOOM_connection_error(ZOOM_connection c, const char **cp,
4028                           const char **addinfo)
4029 {
4030     return ZOOM_connection_error_x(c, cp, addinfo, 0);
4031 }
4032
4033 static void ZOOM_connection_do_io(ZOOM_connection c, int mask)
4034 {
4035     ZOOM_Event event = 0;
4036     int r = cs_look(c->cs);
4037     yaz_log(log_details, "%p ZOOM_connection_do_io mask=%d cs_look=%d",
4038             c, mask, r);
4039
4040     if (r == CS_NONE)
4041     {
4042         event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
4043         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, c->host_port);
4044         do_close(c);
4045         ZOOM_connection_put_event(c, event);
4046     }
4047     else if (r == CS_CONNECT)
4048     {
4049         int ret = ret = cs_rcvconnect(c->cs);
4050         yaz_log(log_details, "%p ZOOM_connection_do_io "
4051                 "cs_rcvconnect returned %d", c, ret);
4052         if (ret == 1)
4053         {
4054             int mask = ZOOM_SELECT_EXCEPT;
4055             if (c->cs->io_pending & CS_WANT_WRITE)
4056                 mask += ZOOM_SELECT_WRITE;
4057             if (c->cs->io_pending & CS_WANT_READ)
4058                 mask += ZOOM_SELECT_READ;
4059             ZOOM_connection_set_mask(c, mask);
4060         }
4061         else if (ret == 0)
4062         {
4063             event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
4064             ZOOM_connection_put_event(c, event);
4065             get_cert(c);
4066             if (c->proto == PROTO_Z3950)
4067                 ZOOM_connection_send_init(c);
4068             else
4069             {
4070                 /* no init request for SRW .. */
4071                 assert(c->tasks->which == ZOOM_TASK_CONNECT);
4072                 ZOOM_connection_remove_task(c);
4073                 ZOOM_connection_set_mask(c, 0);
4074                 ZOOM_connection_exec_task(c);
4075             }
4076             c->state = STATE_ESTABLISHED;
4077         }
4078         else
4079         {
4080             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, c->host_port);
4081             do_close(c);
4082         }
4083     }
4084     else
4085     {
4086         if (mask & ZOOM_SELECT_EXCEPT)
4087         {
4088             if (!ZOOM_test_reconnect(c))
4089             {
4090                 set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, c->host_port);
4091                 do_close(c);
4092             }
4093             return;
4094         }
4095         if (mask & ZOOM_SELECT_READ)
4096             do_read(c);
4097         if (c->cs && (mask & ZOOM_SELECT_WRITE))
4098             do_write(c);
4099     }
4100 }
4101
4102 ZOOM_API(int)
4103     ZOOM_connection_last_event(ZOOM_connection cs)
4104 {
4105     if (!cs)
4106         return ZOOM_EVENT_NONE;
4107     return cs->last_event;
4108 }
4109
4110
4111 /*
4112  * Returns an xmalloc()d string containing RPN that corresponds to the
4113  * CQL passed in.  On error, sets the Connection object's error state
4114  * and returns a null pointer.
4115  * ### We could cache CQL parser and/or transformer in Connection.
4116  */
4117 static char *cql2pqf(ZOOM_connection c, const char *cql)
4118 {
4119     CQL_parser parser;
4120     int error;
4121     struct cql_node *node;
4122     const char *cqlfile;
4123     static cql_transform_t trans;
4124     char pqfbuf[512];
4125
4126     parser = cql_parser_create();
4127     if ((error = cql_parser_string(parser, cql)) != 0) {
4128         cql_parser_destroy(parser);
4129         set_ZOOM_error(c, ZOOM_ERROR_CQL_PARSE, cql);
4130         return 0;
4131     }
4132
4133     node = cql_parser_result(parser);
4134     /* ### Do not call cql_parser_destroy() yet: it destroys `node'! */
4135
4136     cqlfile = ZOOM_connection_option_get(c, "cqlfile");
4137     if (cqlfile == 0) {
4138         cql_parser_destroy(parser);
4139         cql_node_destroy(node);
4140         set_ZOOM_error(c, ZOOM_ERROR_CQL_TRANSFORM, "no CQL transform file");
4141         return 0;
4142     }
4143
4144     if ((trans = cql_transform_open_fname(cqlfile)) == 0) {
4145         char buf[512];
4146         cql_parser_destroy(parser);
4147         cql_node_destroy(node);
4148         sprintf(buf, "can't open CQL transform file '%.200s': %.200s",
4149                 cqlfile, strerror(errno));
4150         set_ZOOM_error(c, ZOOM_ERROR_CQL_TRANSFORM, buf);
4151         return 0;
4152     }
4153
4154     error = cql_transform_buf(trans, node, pqfbuf, sizeof pqfbuf);
4155     cql_parser_destroy(parser);
4156     cql_node_destroy(node);
4157     if (error != 0) {
4158         char buf[512];
4159         const char *addinfo;
4160         error = cql_transform_error(trans, &addinfo);
4161         cql_transform_close(trans);
4162         sprintf(buf, "%.200s (addinfo=%.200s)", cql_strerror(error), addinfo);
4163         set_ZOOM_error(c, ZOOM_ERROR_CQL_TRANSFORM, buf);
4164         return 0;
4165     }
4166
4167     cql_transform_close(trans);
4168     return xstrdup(pqfbuf);
4169 }
4170
4171 ZOOM_API(int) ZOOM_connection_fire_event_timeout(ZOOM_connection c)
4172 {
4173     if (c->mask)
4174     {
4175         ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
4176         /* timeout and this connection was waiting */
4177         set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
4178         do_close(c);
4179         ZOOM_connection_put_event(c, event);
4180     }
4181     return 0;
4182 }
4183
4184 ZOOM_API(int)
4185     ZOOM_connection_process(ZOOM_connection c)
4186 {
4187     ZOOM_Event event;
4188     if (!c)
4189         return 0;
4190
4191     event = ZOOM_connection_get_event(c);
4192     if (event)
4193     {
4194         ZOOM_Event_destroy(event);
4195         return 1;
4196     }
4197     ZOOM_connection_exec_task(c);
4198     event = ZOOM_connection_get_event(c);
4199     if (event)
4200     {
4201         ZOOM_Event_destroy(event);
4202         return 1;
4203     }
4204     return 0;
4205 }
4206
4207 ZOOM_API(int)
4208     ZOOM_event_nonblock(int no, ZOOM_connection *cs)
4209 {
4210     int i;
4211
4212     yaz_log(log_details, "ZOOM_process_event(no=%d,cs=%p)", no, cs);
4213
4214     for (i = 0; i<no; i++)
4215     {
4216         ZOOM_connection c = cs[i];
4217
4218         if (c && ZOOM_connection_process(c))
4219             return i+1;
4220     }
4221     return 0;
4222 }
4223
4224 ZOOM_API(int) ZOOM_connection_fire_event_socket(ZOOM_connection c, int mask)
4225 {
4226     if (c->mask && mask)
4227         ZOOM_connection_do_io(c, mask);
4228     return 0;
4229 }
4230
4231 ZOOM_API(int) ZOOM_connection_get_socket(ZOOM_connection c)
4232 {
4233     if (c->cs)
4234         return cs_fileno(c->cs);
4235     return -1;
4236 }
4237
4238 ZOOM_API(int) ZOOM_connection_set_mask(ZOOM_connection c, int mask)
4239 {
4240     c->mask = mask;
4241     if (!c->cs)
4242         return -1;
4243     return 0;
4244 }
4245
4246 ZOOM_API(int) ZOOM_connection_get_mask(ZOOM_connection c)
4247 {
4248     if (c->cs)
4249         return c->mask;
4250     return 0;
4251 }
4252
4253 ZOOM_API(int) ZOOM_connection_get_timeout(ZOOM_connection c)
4254 {
4255     return ZOOM_options_get_int(c->options, "timeout", 30);
4256 }
4257
4258 /*
4259  * Local variables:
4260  * c-basic-offset: 4
4261  * indent-tabs-mode: nil
4262  * End:
4263  * vim: shiftwidth=4 tabstop=8 expandtab
4264  */
4265