src/zoom-c.c

   1 /*
   2  * Copyright (C) 1995-2006, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: zoom-c.c,v 1.101 2006-12-06 11:12:14 mike 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 #if HAVE_SYS_TYPES_H
  31 #include <sys/types.h>
  32 #endif
  33 #if HAVE_SYS_TIME_H
  34 #include <sys/time.h>
  35 #endif
  36 #if HAVE_SYS_POLL_H
  37 #include <sys/poll.h>
  38 #endif
  39 #if HAVE_SYS_SELECT_H
  40 #include <sys/select.h>
  41 #endif
  42 #ifdef WIN32
  43 #if FD_SETSIZE < 512
  44 #define FD_SETSIZE 512
  45 #endif
  46 #include <winsock.h>
  47 #endif
  48
  49 static int log_api = 0;
  50 static int log_details = 0;
  51
  52 typedef enum {
  53     zoom_pending,
  54     zoom_complete
  55 } zoom_ret;
  56
  57 static zoom_ret ZOOM_connection_send_init(ZOOM_connection c);
  58 static zoom_ret do_write_ex(ZOOM_connection c, char *buf_out, int len_out);
  59 static char *cql2pqf(ZOOM_connection c, const char *cql);
  60
  61 static void initlog(void)
  62 {
  63     static int log_level_initialized = 0;
  64     if (!log_level_initialized)
  65     {
  66         log_api = yaz_log_module_level("zoom");
  67         log_details = yaz_log_module_level("zoomdetails");
  68         log_level_initialized = 1;
  69     }
  70 }
  71
  72 static ZOOM_Event ZOOM_Event_create(int kind)
  73 {
  74     ZOOM_Event event = (ZOOM_Event) xmalloc(sizeof(*event));
  75     event->kind = kind;
  76     event->next = 0;
  77     event->prev = 0;
  78     yaz_log(log_details, "ZOOM_Event_create(kind=%d)", kind);
  79     return event;
  80 }
  81
  82 static void ZOOM_Event_destroy(ZOOM_Event event)
  83 {
  84     xfree(event);
  85 }
  86
  87 static void ZOOM_connection_put_event(ZOOM_connection c, ZOOM_Event event)
  88 {
  89     if (c->m_queue_back)
  90     {
  91         c->m_queue_back->prev = event;
  92         assert(c->m_queue_front);
  93     }
  94     else
  95     {
  96         assert(!c->m_queue_front);
  97         c->m_queue_front = event;
  98     }
  99     event->next = c->m_queue_back;
 100     event->prev = 0;
 101     c->m_queue_back = event;
 102 }
 103
 104 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
 105 {
 106     ZOOM_Event event = c->m_queue_front;
 107     if (!event)
 108     {
 109         c->last_event = ZOOM_EVENT_NONE;
 110         return 0;
 111     }
 112     assert(c->m_queue_back);
 113     c->m_queue_front = event->prev;
 114     if (c->m_queue_front)
 115     {
 116         assert(c->m_queue_back);
 117         c->m_queue_front->next = 0;
 118     }
 119     else
 120         c->m_queue_back = 0;
 121     c->last_event = event->kind;
 122     return event;
 123 }
 124
 125
 126 static void set_dset_error(ZOOM_connection c, int error,
 127                            const char *dset,
 128                            const char *addinfo, const char *addinfo2)
 129 {
 130     char *cp;
 131
 132     xfree(c->addinfo);
 133     c->addinfo = 0;
 134     c->error = error;
 135     if (!c->diagset || strcmp(dset, c->diagset))
 136     {
 137         xfree(c->diagset);
 138         c->diagset = xstrdup(dset);
 139         /* remove integer part from SRW diagset .. */
 140         if ((cp = strrchr(c->diagset, '/')))
 141             *cp = '\0';
 142     }
 143     if (addinfo && addinfo2)
 144     {
 145         c->addinfo = (char*) xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
 146         strcpy(c->addinfo, addinfo);
 147         strcat(c->addinfo, addinfo2);
 148     }
 149     else if (addinfo)
 150         c->addinfo = xstrdup(addinfo);
 151     if (error)
 152         yaz_log(log_api, "%p set_dset_error %s %s:%d %s %s",
 153                 c, c->host_port ? c->host_port : "<>", dset, error,
 154                 addinfo ? addinfo : "",
 155                 addinfo2 ? addinfo2 : "");
 156 }
 157
 158 #if YAZ_HAVE_XML2
 159 static void set_HTTP_error(ZOOM_connection c, int error,
 160                            const char *addinfo, const char *addinfo2)
 161 {
 162     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 163 }
 164 #endif
 165
 166 static void set_ZOOM_error(ZOOM_connection c, int error,
 167                            const char *addinfo)
 168 {
 169     set_dset_error(c, error, "ZOOM", addinfo, 0);
 170 }
 171
 172 static void clear_error(ZOOM_connection c)
 173 {
 174     /*
 175      * If an error is tied to an operation then it's ok to clear: for
 176      * example, a diagnostic returned from a search is cleared by a
 177      * subsequent search.  However, problems such as Connection Lost
 178      * or Init Refused are not cleared, because they are not
 179      * recoverable: doing another search doesn't help.
 180      */
 181     switch (c->error)
 182     {
 183     case ZOOM_ERROR_CONNECT:
 184     case ZOOM_ERROR_MEMORY:
 185     case ZOOM_ERROR_DECODE:
 186     case ZOOM_ERROR_CONNECTION_LOST:
 187     case ZOOM_ERROR_INIT:
 188     case ZOOM_ERROR_INTERNAL:
 189     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 190         break;
 191     default:
 192         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 193     }
 194 }
 195
 196 void ZOOM_connection_show_task(ZOOM_task task)
 197 {
 198     switch(task->which)
 199     {
 200     case ZOOM_TASK_SEARCH:
 201         yaz_log(YLOG_LOG, "search p=%p", task);
 202         break;
 203     case ZOOM_TASK_RETRIEVE:
 204         yaz_log(YLOG_LOG, "retrieve p=%p", task);
 205         break;
 206     case ZOOM_TASK_CONNECT:
 207         yaz_log(YLOG_LOG, "connect p=%p", task);
 208         break;
 209     case ZOOM_TASK_SCAN:
 210         yaz_log(YLOG_LOG, "scant p=%p", task);
 211         break;
 212     }
 213 }
 214
 215 void ZOOM_connection_show_tasks(ZOOM_connection c)
 216 {
 217     ZOOM_task task;
 218     yaz_log(YLOG_LOG, "connection p=%p tasks", c);
 219     for (task = c->tasks; task; task = task->next)
 220         ZOOM_connection_show_task(task);
 221 }
 222
 223 ZOOM_task ZOOM_connection_add_task(ZOOM_connection c, int which)
 224 {
 225     ZOOM_task *taskp = &c->tasks;
 226     while (*taskp)
 227         taskp = &(*taskp)->next;
 228     *taskp = (ZOOM_task) xmalloc(sizeof(**taskp));
 229     (*taskp)->running = 0;
 230     (*taskp)->which = which;
 231     (*taskp)->next = 0;
 232     clear_error(c);
 233     return *taskp;
 234 }
 235
 236 ZOOM_API(int) ZOOM_connection_is_idle(ZOOM_connection c)
 237 {
 238     return c->tasks ? 0 : 1;
 239 }
 240
 241 ZOOM_task ZOOM_connection_insert_task(ZOOM_connection c, int which)
 242 {
 243     ZOOM_task task = (ZOOM_task) xmalloc(sizeof(*task));
 244
 245     task->next = c->tasks;
 246     c->tasks = task;
 247
 248     task->running = 0;
 249     task->which = which;
 250     clear_error(c);
 251     return task;
 252 }
 253
 254 void ZOOM_connection_remove_task(ZOOM_connection c)
 255 {
 256     ZOOM_task task = c->tasks;
 257
 258     if (task)
 259     {
 260         c->tasks = task->next;
 261         switch (task->which)
 262         {
 263         case ZOOM_TASK_SEARCH:
 264             ZOOM_resultset_destroy(task->u.search.resultset);
 265             xfree(task->u.search.syntax);
 266             xfree(task->u.search.elementSetName);
 267             break;
 268         case ZOOM_TASK_RETRIEVE:
 269             ZOOM_resultset_destroy(task->u.retrieve.resultset);
 270             xfree(task->u.retrieve.syntax);
 271             xfree(task->u.retrieve.elementSetName);
 272             break;
 273         case ZOOM_TASK_CONNECT:
 274             break;
 275         case ZOOM_TASK_SCAN:
 276             ZOOM_scanset_destroy(task->u.scan.scan);
 277             break;
 278         case ZOOM_TASK_PACKAGE:
 279             ZOOM_package_destroy(task->u.package);
 280             break;
 281         case ZOOM_TASK_SORT:
 282             ZOOM_resultset_destroy(task->u.sort.resultset);
 283             ZOOM_query_destroy(task->u.sort.q);
 284             break;
 285         default:
 286             assert(0);
 287         }
 288         xfree(task);
 289
 290         if (!c->tasks)
 291         {
 292             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_END);
 293             ZOOM_connection_put_event(c, event);
 294         }
 295     }
 296 }
 297
 298 static int ZOOM_connection_exec_task(ZOOM_connection c);
 299
 300 void ZOOM_connection_remove_tasks(ZOOM_connection c)
 301 {
 302     while (c->tasks)
 303         ZOOM_connection_remove_task(c);
 304 }
 305
 306 static ZOOM_record record_cache_lookup(ZOOM_resultset r, int pos,
 307                                        const char *syntax,
 308                                        const char *elementSetName);
 309
 310 ZOOM_API(ZOOM_connection)
 311     ZOOM_connection_create(ZOOM_options options)
 312 {
 313     ZOOM_connection c = (ZOOM_connection) xmalloc(sizeof(*c));
 314
 315     initlog();
 316
 317     yaz_log(log_api, "%p ZOOM_connection_create", c);
 318
 319     c->proto = PROTO_Z3950;
 320     c->cs = 0;
 321     c->mask = 0;
 322     c->reconnect_ok = 0;
 323     c->state = STATE_IDLE;
 324     c->addinfo = 0;
 325     c->diagset = 0;
 326     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 327     c->buf_in = 0;
 328     c->len_in = 0;
 329     c->buf_out = 0;
 330     c->len_out = 0;
 331     c->resultsets = 0;
 332
 333     c->options = ZOOM_options_create_with_parent(options);
 334
 335     c->host_port = 0;
 336     c->path = 0;
 337     c->proxy = 0;
 338
 339     c->charset = c->lang = 0;
 340
 341     c->cookie_out = 0;
 342     c->cookie_in = 0;
 343     c->client_IP = 0;
 344     c->tasks = 0;
 345
 346     c->odr_in = odr_createmem(ODR_DECODE);
 347     c->odr_out = odr_createmem(ODR_ENCODE);
 348
 349     c->async = 0;
 350     c->support_named_resultsets = 0;
 351     c->last_event = ZOOM_EVENT_NONE;
 352
 353     c->m_queue_front = 0;
 354     c->m_queue_back = 0;
 355     return c;
 356 }
 357
 358
 359 /* set database names. Take local databases (if set); otherwise
 360    take databases given in ZURL (if set); otherwise use Default */
 361 static char **set_DatabaseNames(ZOOM_connection con, ZOOM_options options,
 362                                 int *num, ODR odr)
 363 {
 364     char **databaseNames;
 365     const char *cp = ZOOM_options_get(options, "databaseName");
 366
 367     if ((!cp || !*cp) && con->host_port)
 368     {
 369         if (strncmp(con->host_port, "unix:", 5) == 0)
 370             cp = strchr(con->host_port+5, ':');
 371         else
 372             cp = strchr(con->host_port, '/');
 373         if (cp)
 374             cp++;
 375     }
 376     if (!cp)
 377         cp = "Default";
 378     nmem_strsplit(odr->mem, "+", cp,  &databaseNames, num);
 379     return databaseNames;
 380 }
 381
 382 ZOOM_API(ZOOM_connection)
 383     ZOOM_connection_new(const char *host, int portnum)
 384 {
 385     ZOOM_connection c = ZOOM_connection_create(0);
 386
 387     ZOOM_connection_connect(c, host, portnum);
 388     return c;
 389 }
 390
 391 static zoom_sru_mode get_sru_mode_from_string(const char *s)
 392 {
 393     if (!s || !*s)
 394         return zoom_sru_soap;
 395     if (!yaz_matchstr(s, "soap"))
 396         return zoom_sru_soap;
 397     else if (!yaz_matchstr(s, "get"))
 398         return zoom_sru_get;
 399     else if (!yaz_matchstr(s, "post"))
 400         return zoom_sru_post;
 401     return zoom_sru_error;
 402 }
 403
 404 ZOOM_API(void)
 405     ZOOM_connection_connect(ZOOM_connection c,
 406                             const char *host, int portnum)
 407 {
 408     const char *val;
 409     ZOOM_task task;
 410
 411     initlog();
 412
 413     yaz_log(log_api, "%p ZOOM_connection_connect host=%s portnum=%d",
 414             c, host, portnum);
 415
 416     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 417     ZOOM_connection_remove_tasks(c);
 418
 419     if (c->cs)
 420     {
 421         yaz_log(log_details, "%p ZOOM_connection_connect reconnect ok", c);
 422         c->reconnect_ok = 1;
 423         return;
 424     }
 425     yaz_log(log_details, "%p ZOOM_connection_connect connect", c);
 426     xfree(c->proxy);
 427     val = ZOOM_options_get(c->options, "proxy");
 428     if (val && *val)
 429     {
 430         yaz_log(log_details, "%p ZOOM_connection_connect proxy=%s", c, val);
 431         c->proxy = xstrdup(val);
 432     }
 433     else
 434         c->proxy = 0;
 435
 436     xfree(c->charset);
 437     val = ZOOM_options_get(c->options, "charset");
 438     if (val && *val)
 439     {
 440         yaz_log(log_details, "%p ZOOM_connection_connect charset=%s", c, val);
 441         c->charset = xstrdup(val);
 442     }
 443     else
 444         c->charset = 0;
 445
 446     xfree(c->lang);
 447     val = ZOOM_options_get(c->options, "lang");
 448     if (val && *val)
 449     {
 450         yaz_log(log_details, "%p ZOOM_connection_connect lang=%s", c, val);
 451         c->lang = xstrdup(val);
 452     }
 453     else
 454         c->lang = 0;
 455
 456     xfree(c->host_port);
 457     if (portnum)
 458     {
 459         char hostn[128];
 460         sprintf(hostn, "%.80s:%d", host, portnum);
 461         c->host_port = xstrdup(hostn);
 462     }
 463     else
 464         c->host_port = xstrdup(host);
 465
 466     {
 467         /*
 468          * If the "<scheme>:" part of the host string is preceded by one
 469          * or more comma-separated <name>=<value> pairs, these are taken
 470          * to be options to be set on the connection object.  Among other
 471          * applications, this facility can be used to embed authentication
 472          * in a host string:
 473          *          user=admin,password=secret,tcp:localhost:9999
 474          */
 475         char *remainder = c->host_port;
 476         char *pcolon = strchr(remainder, ':');
 477         char *pcomma;
 478         char *pequals;
 479         while ((pcomma = strchr(remainder, ',')) != 0 &&
 480                (pcolon == 0 || pcomma < pcolon)) {
 481             *pcomma = '\0';
 482             if ((pequals = strchr(remainder, '=')) != 0) {
 483                 *pequals = '\0';
 484                 /*printf("# setting '%s'='%s'\n", remainder, pequals+1);*/
 485                 ZOOM_connection_option_set(c, remainder, pequals+1);
 486             }
 487             remainder = pcomma+1;
 488         }
 489
 490         if (remainder != c->host_port) {
 491             xfree(c->host_port);
 492             c->host_port = xstrdup(remainder);
 493             /*printf("# reset hp='%s'\n", remainder);*/
 494         }
 495     }
 496
 497     val = ZOOM_options_get(c->options, "sru");
 498     c->sru_mode = get_sru_mode_from_string(val);
 499
 500     ZOOM_options_set(c->options, "host", c->host_port);
 501
 502     val = ZOOM_options_get(c->options, "cookie");
 503     if (val && *val)
 504     {
 505         yaz_log(log_details, "%p ZOOM_connection_connect cookie=%s", c, val);
 506         c->cookie_out = xstrdup(val);
 507     }
 508
 509     val = ZOOM_options_get(c->options, "clientIP");
 510     if (val && *val)
 511     {
 512         yaz_log(log_details, "%p ZOOM_connection_connect clientIP=%s",
 513                 c, val);
 514         c->client_IP = xstrdup(val);
 515     }
 516
 517     c->async = ZOOM_options_get_bool(c->options, "async", 0);
 518     yaz_log(log_details, "%p ZOOM_connection_connect async=%d", c, c->async);
 519
 520     task = ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 521
 522     if (!c->async)
 523     {
 524         while (ZOOM_event(1, &c))
 525             ;
 526     }
 527 }
 528
 529 ZOOM_API(ZOOM_query)
 530     ZOOM_query_create(void)
 531 {
 532     ZOOM_query s = (ZOOM_query) xmalloc(sizeof(*s));
 533
 534     yaz_log(log_details, "%p ZOOM_query_create", s);
 535     s->refcount = 1;
 536     s->z_query = 0;
 537     s->sort_spec = 0;
 538     s->odr = odr_createmem(ODR_ENCODE);
 539     s->query_string = 0;
 540
 541     return s;
 542 }
 543
 544 ZOOM_API(void)
 545     ZOOM_query_destroy(ZOOM_query s)
 546 {
 547     if (!s)
 548         return;
 549
 550     (s->refcount)--;
 551     yaz_log(log_details, "%p ZOOM_query_destroy count=%d", s, s->refcount);
 552     if (s->refcount == 0)
 553     {
 554         odr_destroy(s->odr);
 555         xfree(s);
 556     }
 557 }
 558
 559 ZOOM_API(int)
 560     ZOOM_query_prefix(ZOOM_query s, const char *str)
 561 {
 562     s->query_string = odr_strdup(s->odr, str);
 563     s->z_query = (Z_Query *) odr_malloc(s->odr, sizeof(*s->z_query));
 564     s->z_query->which = Z_Query_type_1;
 565     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 566     if (!s->z_query->u.type_1)
 567     {
 568         yaz_log(log_details, "%p ZOOM_query_prefix str=%s failed", s, str);
 569         s->z_query = 0;
 570         return -1;
 571     }
 572     yaz_log(log_details, "%p ZOOM_query_prefix str=%s", s, str);
 573     return 0;
 574 }
 575
 576 ZOOM_API(int)
 577     ZOOM_query_cql(ZOOM_query s, const char *str)
 578 {
 579     Z_External *ext;
 580
 581     s->query_string = odr_strdup(s->odr, str);
 582
 583     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 584     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 585     ext->indirect_reference = 0;
 586     ext->descriptor = 0;
 587     ext->which = Z_External_CQL;
 588     ext->u.cql = s->query_string;
 589
 590     s->z_query = (Z_Query *) odr_malloc(s->odr, sizeof(*s->z_query));
 591     s->z_query->which = Z_Query_type_104;
 592     s->z_query->u.type_104 =  ext;
 593
 594     yaz_log(log_details, "%p ZOOM_query_cql str=%s", s, str);
 595
 596     return 0;
 597 }
 598
 599 /*
 600  * Translate the CQL string client-side into RPN which is passed to
 601  * the server.  This is useful for server's that don't themselves
 602  * support CQL, for which ZOOM_query_cql() is useless.  `conn' is used
 603  * only as a place to stash diagnostics if compilation fails; if this
 604  * information is not needed, a null pointer may be used.
 605  */
 606 ZOOM_API(int)
 607     ZOOM_query_cql2rpn(ZOOM_query s, const char *str, ZOOM_connection conn)
 608 {
 609     char *rpn;
 610     int ret;
 611     ZOOM_connection freeme = 0;
 612
 613     yaz_log(log_details, "%p ZOOM_query_cql2rpn str=%s conn=%p", s, str, conn);
 614     if (conn == 0)
 615         conn = freeme = ZOOM_connection_create(0);
 616
 617     rpn = cql2pqf(conn, str);
 618     if (freeme != 0)
 619         ZOOM_connection_destroy(freeme);
 620     if (rpn == 0)
 621         return -1;
 622
 623     ret = ZOOM_query_prefix(s, rpn);
 624     xfree(rpn);
 625     return ret;
 626 }
 627
 628 /*
 629  * Analogous in every way to ZOOM_query_cql2rpn(), except that there
 630  * is no analogous ZOOM_query_ccl() that just sends uninterpreted CCL
 631  * to the server, as the YAZ GFS doesn't know how to handle this.
 632  */
 633 ZOOM_API(int)
 634     ZOOM_query_ccl2rpn(ZOOM_query s, const char *str, const char *config,
 635                        int *ccl_error, const char **error_string,
 636                        int *error_pos)
 637 {
 638     int ret;
 639     struct ccl_rpn_node *rpn;
 640     CCL_bibset bibset = ccl_qual_mk();
 641
 642     if (config)
 643         ccl_qual_buf(bibset, config);
 644
 645     rpn = ccl_find_str(bibset, str, ccl_error, error_pos);
 646     if (!rpn)
 647     {
 648         *error_string = ccl_err_msg(*ccl_error);
 649         ret = -1;
 650     }
 651     else
 652     {
 653         WRBUF wr = wrbuf_alloc();
 654         ccl_pquery(wr, rpn);
 655         ccl_rpn_delete(rpn);
 656         ret = ZOOM_query_prefix(s, wrbuf_buf(wr));
 657         wrbuf_free(wr, 1);
 658     }
 659     ccl_qual_rm(&bibset);
 660     return ret;
 661 }
 662
 663 ZOOM_API(int)
 664     ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 665 {
 666     s->sort_spec = yaz_sort_spec(s->odr, criteria);
 667     if (!s->sort_spec)
 668     {
 669         yaz_log(log_details, "%p ZOOM_query_sortby criteria=%s failed",
 670                 s, criteria);
 671         return -1;
 672     }
 673     yaz_log(log_details, "%p ZOOM_query_sortby criteria=%s", s, criteria);
 674     return 0;
 675 }
 676
 677 static zoom_ret do_write(ZOOM_connection c);
 678
 679 ZOOM_API(void)
 680     ZOOM_connection_destroy(ZOOM_connection c)
 681 {
 682     ZOOM_resultset r;
 683     if (!c)
 684         return;
 685     yaz_log(log_api, "%p ZOOM_connection_destroy", c);
 686     if (c->cs)
 687         cs_close(c->cs);
 688     for (r = c->resultsets; r; r = r->next)
 689         r->connection = 0;
 690
 691     xfree(c->buf_in);
 692     xfree(c->addinfo);
 693     xfree(c->diagset);
 694     odr_destroy(c->odr_in);
 695     odr_destroy(c->odr_out);
 696     ZOOM_options_destroy(c->options);
 697     ZOOM_connection_remove_tasks(c);
 698     xfree(c->host_port);
 699     xfree(c->path);
 700     xfree(c->proxy);
 701     xfree(c->charset);
 702     xfree(c->lang);
 703     xfree(c->cookie_out);
 704     xfree(c->cookie_in);
 705     xfree(c->client_IP);
 706     xfree(c);
 707 }
 708
 709 void ZOOM_resultset_addref(ZOOM_resultset r)
 710 {
 711     if (r)
 712     {
 713         (r->refcount)++;
 714         yaz_log(log_details, "%p ZOOM_resultset_addref count=%d",
 715                 r, r->refcount);
 716     }
 717 }
 718
 719 ZOOM_resultset ZOOM_resultset_create(void)
 720 {
 721     int i;
 722     ZOOM_resultset r = (ZOOM_resultset) xmalloc(sizeof(*r));
 723
 724     initlog();
 725
 726     yaz_log(log_details, "%p ZOOM_resultset_create", r);
 727     r->refcount = 1;
 728     r->size = 0;
 729     r->odr = odr_createmem(ODR_ENCODE);
 730     r->piggyback = 1;
 731     r->setname = 0;
 732     r->schema = 0;
 733     r->step = 0;
 734     for (i = 0; i<RECORD_HASH_SIZE; i++)
 735         r->record_hash[i] = 0;
 736     r->r_sort_spec = 0;
 737     r->query = 0;
 738     r->connection = 0;
 739     r->next = 0;
 740     r->databaseNames = 0;
 741     r->num_databaseNames = 0;
 742     return r;
 743 }
 744
 745 ZOOM_API(ZOOM_resultset)
 746     ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 747 {
 748     ZOOM_resultset r;
 749     ZOOM_query s = ZOOM_query_create();
 750
 751     ZOOM_query_prefix(s, q);
 752
 753     r = ZOOM_connection_search(c, s);
 754     ZOOM_query_destroy(s);
 755     return r;
 756 }
 757
 758 ZOOM_API(ZOOM_resultset)
 759     ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 760 {
 761     ZOOM_resultset r = ZOOM_resultset_create();
 762     ZOOM_task task;
 763     const char *cp;
 764     int start, count;
 765     const char *syntax, *elementSetName;
 766
 767     yaz_log(log_api, "%p ZOOM_connection_search set %p query %p", c, r, q);
 768     r->r_sort_spec = q->sort_spec;
 769     r->query = q;
 770
 771     r->options = ZOOM_options_create_with_parent(c->options);
 772
 773     start = ZOOM_options_get_int(r->options, "start", 0);
 774     count = ZOOM_options_get_int(r->options, "count", 0);
 775     {
 776         /* If "presentChunk" is defined use that; otherwise "step" */
 777         const char *cp = ZOOM_options_get(r->options, "presentChunk");
 778         r->step = ZOOM_options_get_int(r->options,
 779                                        (cp != 0 ? "presentChunk": "step"), 0);
 780     }
 781     r->piggyback = ZOOM_options_get_bool(r->options, "piggyback", 1);
 782     cp = ZOOM_options_get(r->options, "setname");
 783     if (cp)
 784         r->setname = xstrdup(cp);
 785     cp = ZOOM_options_get(r->options, "schema");
 786     if (cp)
 787         r->schema = xstrdup(cp);
 788
 789     r->databaseNames = set_DatabaseNames(c, c->options, &r->num_databaseNames,
 790                                          r->odr);
 791
 792     r->connection = c;
 793
 794     r->next = c->resultsets;
 795     c->resultsets = r;
 796
 797     if (c->host_port && c->proto == PROTO_HTTP)
 798     {
 799         if (!c->cs)
 800         {
 801             yaz_log(log_details, "ZOOM_connection_search: no comstack");
 802             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 803         }
 804         else
 805         {
 806             yaz_log(log_details, "ZOOM_connection_search: reconnect");
 807             c->reconnect_ok = 1;
 808         }
 809     }
 810
 811     task = ZOOM_connection_add_task(c, ZOOM_TASK_SEARCH);
 812     task->u.search.resultset = r;
 813     task->u.search.start = start;
 814     task->u.search.count = count;
 815
 816     syntax = ZOOM_options_get(r->options, "preferredRecordSyntax");
 817     task->u.search.syntax = syntax ? xstrdup(syntax) : 0;
 818     elementSetName = ZOOM_options_get(r->options, "elementSetName");
 819     task->u.search.elementSetName = elementSetName
 820         ? xstrdup(elementSetName) : 0;
 821
 822     ZOOM_resultset_addref(r);
 823
 824     (q->refcount)++;
 825
 826     if (!c->async)
 827     {
 828         while (ZOOM_event(1, &c))
 829             ;
 830     }
 831     return r;
 832 }
 833
 834 /*
 835  * This is the old result-set sorting API, which is maintained only
 836  * for the sake of binary compatibility.  There is no reason ever to
 837  * use this rather than ZOOM_resultset_sort1().
 838  */
 839 ZOOM_API(void)
 840     ZOOM_resultset_sort(ZOOM_resultset r,
 841                         const char *sort_type, const char *sort_spec)
 842 {
 843     (void) ZOOM_resultset_sort1(r, sort_type, sort_spec);
 844 }
 845
 846 ZOOM_API(int)
 847     ZOOM_resultset_sort1(ZOOM_resultset r,
 848                          const char *sort_type, const char *sort_spec)
 849 {
 850     ZOOM_connection c = r->connection;
 851     ZOOM_task task;
 852     ZOOM_query newq;
 853
 854     newq = ZOOM_query_create();
 855     if (ZOOM_query_sortby(newq, sort_spec) < 0)
 856         return -1;
 857
 858     yaz_log(log_api, "%p ZOOM_resultset_sort r=%p sort_type=%s sort_spec=%s",
 859             r, r, sort_type, sort_spec);
 860     if (!c)
 861         return 0;
 862
 863     if (c->host_port && c->proto == PROTO_HTTP)
 864     {
 865         if (!c->cs)
 866         {
 867             yaz_log(log_details, "%p ZOOM_resultset_sort: no comstack", r);
 868             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 869         }
 870         else
 871         {
 872             yaz_log(log_details, "%p ZOOM_resultset_sort: prepare reconnect",
 873                     r);
 874             c->reconnect_ok = 1;
 875         }
 876     }
 877
 878     ZOOM_resultset_cache_reset(r);
 879     task = ZOOM_connection_add_task(c, ZOOM_TASK_SORT);
 880     task->u.sort.resultset = r;
 881     task->u.sort.q = newq;
 882
 883     ZOOM_resultset_addref(r);
 884
 885     if (!c->async)
 886     {
 887         while (ZOOM_event(1, &c))
 888             ;
 889     }
 890
 891     return 0;
 892 }
 893
 894 ZOOM_API(void)
 895     ZOOM_resultset_cache_reset(ZOOM_resultset r)
 896 {
 897     int i;
 898     for (i = 0; i<RECORD_HASH_SIZE; i++)
 899     {
 900         ZOOM_record_cache rc;
 901         for (rc = r->record_hash[i]; rc; rc = rc->next)
 902         {
 903             if (rc->rec.wrbuf_marc)
 904                 wrbuf_free(rc->rec.wrbuf_marc, 1);
 905             if (rc->rec.wrbuf_iconv)
 906                 wrbuf_free(rc->rec.wrbuf_iconv, 1);
 907             if (rc->rec.wrbuf_opac)
 908                 wrbuf_free(rc->rec.wrbuf_opac, 1);
 909         }
 910         r->record_hash[i] = 0;
 911     }
 912 }
 913
 914 ZOOM_API(void)
 915     ZOOM_resultset_destroy(ZOOM_resultset r)
 916 {
 917     if (!r)
 918         return;
 919     (r->refcount)--;
 920     yaz_log(log_details, "%p ZOOM_resultset_destroy r=%p count=%d",
 921             r, r, r->refcount);
 922     if (r->refcount == 0)
 923     {
 924         ZOOM_resultset_cache_reset(r);
 925
 926         if (r->connection)
 927         {
 928             /* remove ourselves from the resultsets in connection */
 929             ZOOM_resultset *rp = &r->connection->resultsets;
 930             while (1)
 931             {
 932                 assert(*rp);   /* we must be in this list!! */
 933                 if (*rp == r)
 934                 {   /* OK, we're here - take us out of it */
 935                     *rp = (*rp)->next;
 936                     break;
 937                 }
 938                 rp = &(*rp)->next;
 939             }
 940         }
 941         ZOOM_query_destroy(r->query);
 942         ZOOM_options_destroy(r->options);
 943         odr_destroy(r->odr);
 944         xfree(r->setname);
 945         xfree(r->schema);
 946         xfree(r);
 947     }
 948 }
 949
 950 ZOOM_API(size_t)
 951     ZOOM_resultset_size(ZOOM_resultset r)
 952 {
 953     yaz_log(log_details, "ZOOM_resultset_size r=%p count=%d",
 954             r, r->size);
 955     return r->size;
 956 }
 957
 958 static void do_close(ZOOM_connection c)
 959 {
 960     if (c->cs)
 961         cs_close(c->cs);
 962     c->cs = 0;
 963     c->mask = 0;
 964     c->state = STATE_IDLE;
 965 }
 966
 967 static int ZOOM_test_reconnect(ZOOM_connection c)
 968 {
 969     if (!c->reconnect_ok)
 970         return 0;
 971     do_close(c);
 972     c->reconnect_ok = 0;
 973     c->tasks->running = 0;
 974     ZOOM_connection_insert_task(c, ZOOM_TASK_CONNECT);
 975     return 1;
 976 }
 977
 978 static void ZOOM_resultset_retrieve(ZOOM_resultset r,
 979                                     int force_sync, int start, int count)
 980 {
 981     ZOOM_task task;
 982     ZOOM_connection c;
 983     const char *cp;
 984     const char *syntax, *elementSetName;
 985
 986     if (!r)
 987         return;
 988     yaz_log(log_details, "%p ZOOM_resultset_retrieve force_sync=%d start=%d"
 989             " count=%d", r, force_sync, start, count);
 990     c = r->connection;
 991     if (!c)
 992         return;
 993
 994     if (c->host_port && c->proto == PROTO_HTTP)
 995     {
 996         if (!c->cs)
 997         {
 998             yaz_log(log_details, "%p ZOOM_resultset_retrieve: no comstack", r);
 999             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
1000         }
1001         else
1002         {
1003             yaz_log(log_details, "%p ZOOM_resultset_retrieve: prepare "
1004                     "reconnect", r);
1005             c->reconnect_ok = 1;
1006         }
1007     }
1008     task = ZOOM_connection_add_task(c, ZOOM_TASK_RETRIEVE);
1009     task->u.retrieve.resultset = r;
1010     task->u.retrieve.start = start;
1011     task->u.retrieve.count = count;
1012
1013     syntax = ZOOM_options_get(r->options, "preferredRecordSyntax");
1014     task->u.retrieve.syntax = syntax ? xstrdup(syntax) : 0;
1015     elementSetName = ZOOM_options_get(r->options, "elementSetName");
1016     task->u.retrieve.elementSetName = elementSetName
1017         ? xstrdup(elementSetName) : 0;
1018
1019     cp = ZOOM_options_get(r->options, "schema");
1020     if (cp)
1021     {
1022         if (!r->schema || strcmp(r->schema, cp))
1023         {
1024             xfree(r->schema);
1025             r->schema = xstrdup(cp);
1026         }
1027     }
1028
1029     ZOOM_resultset_addref(r);
1030
1031     if (!r->connection->async || force_sync)
1032         while (r->connection && ZOOM_event(1, &r->connection))
1033             ;
1034 }
1035
1036 ZOOM_API(void)
1037     ZOOM_resultset_records(ZOOM_resultset r, ZOOM_record *recs,
1038                            size_t start, size_t count)
1039 {
1040     int force_present = 0;
1041
1042     if (!r)
1043         return ;
1044     yaz_log(log_api, "%p ZOOM_resultset_records r=%p start=%ld count=%ld",
1045             r, r, (long) start, (long) count);
1046     if (count && recs)
1047         force_present = 1;
1048     ZOOM_resultset_retrieve(r, force_present, start, count);
1049     if (force_present)
1050     {
1051         size_t i;
1052         for (i = 0; i< count; i++)
1053             recs[i] = ZOOM_resultset_record_immediate(r, i+start);
1054     }
1055 }
1056
1057 static void get_cert(ZOOM_connection c)
1058 {
1059     char *cert_buf;
1060     int cert_len;
1061
1062     if (cs_get_peer_certificate_x509(c->cs, &cert_buf, &cert_len))
1063     {
1064         ZOOM_connection_option_setl(c, "sslPeerCert",
1065                                     cert_buf, cert_len);
1066         xfree(cert_buf);
1067     }
1068 }
1069
1070 static zoom_ret do_connect(ZOOM_connection c)
1071 {
1072     void *add;
1073     const char *effective_host;
1074
1075     if (c->proxy)
1076         effective_host = c->proxy;
1077     else
1078         effective_host = c->host_port;
1079
1080     yaz_log(log_details, "%p do_connect effective_host=%s", c, effective_host);
1081
1082     if (c->cs)
1083         cs_close(c->cs);
1084     c->cs = cs_create_host(effective_host, 0, &add);
1085
1086     if (c->cs && c->cs->protocol == PROTO_HTTP)
1087     {
1088 #if YAZ_HAVE_XML2
1089         const char *path = 0;
1090
1091         c->proto = PROTO_HTTP;
1092         cs_get_host_args(c->host_port, &path);
1093         xfree(c->path);
1094         c->path = (char*) xmalloc(strlen(path)+2);
1095         c->path[0] = '/';
1096         strcpy(c->path+1, path);
1097 #else
1098         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
1099         do_close(c);
1100         return zoom_complete;
1101 #endif
1102     }
1103     if (c->cs)
1104     {
1105         int ret = cs_connect(c->cs, add);
1106         if (ret == 0)
1107         {
1108             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
1109             ZOOM_connection_put_event(c, event);
1110             get_cert(c);
1111             if (c->proto == PROTO_Z3950)
1112                 ZOOM_connection_send_init(c);
1113             else
1114             {
1115                 /* no init request for SRW .. */
1116                 assert(c->tasks->which == ZOOM_TASK_CONNECT);
1117                 ZOOM_connection_remove_task(c);
1118                 c->mask = 0;
1119                 ZOOM_connection_exec_task(c);
1120             }
1121             c->state = STATE_ESTABLISHED;
1122             return zoom_pending;
1123         }
1124         else if (ret > 0)
1125         {
1126             c->state = STATE_CONNECTING;
1127             c->mask = ZOOM_SELECT_EXCEPT;
1128             if (c->cs->io_pending & CS_WANT_WRITE)
1129                 c->mask += ZOOM_SELECT_WRITE;
1130             if (c->cs->io_pending & CS_WANT_READ)
1131                 c->mask += ZOOM_SELECT_READ;
1132             return zoom_pending;
1133         }
1134     }
1135     c->state = STATE_IDLE;
1136     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, c->host_port);
1137     return zoom_complete;
1138 }
1139
1140 int z3950_connection_socket(ZOOM_connection c)
1141 {
1142     if (c->cs)
1143         return cs_fileno(c->cs);
1144     return -1;
1145 }
1146
1147 int z3950_connection_mask(ZOOM_connection c)
1148 {
1149     if (c->cs)
1150         return c->mask;
1151     return 0;
1152 }
1153
1154 static void otherInfo_attach(ZOOM_connection c, Z_APDU *a, ODR out)
1155 {
1156     int i;
1157     for (i = 0; i<200; i++)
1158     {
1159         size_t len;
1160         Z_OtherInformation **oi;
1161         char buf[80];
1162         const char *val;
1163         const char *cp;
1164         int oidval;
1165
1166         sprintf(buf, "otherInfo%d", i);
1167         val = ZOOM_options_get(c->options, buf);
1168         if (!val)
1169             break;
1170         cp = strchr(val, ':');
1171         if (!cp)
1172             continue;
1173         len = cp - val;
1174         if (len >= sizeof(buf))
1175             len = sizeof(buf)-1;
1176         memcpy(buf, val, len);
1177         buf[len] = '\0';
1178         oidval = oid_getvalbyname(buf);
1179         if (oidval == VAL_NONE)
1180             continue;
1181
1182         yaz_oi_APDU(a, &oi);
1183         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
1184     }
1185 }
1186
1187 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
1188 {
1189     assert(a);
1190     if (c->cookie_out)
1191     {
1192         Z_OtherInformation **oi;
1193         yaz_oi_APDU(a, &oi);
1194         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
1195     }
1196     if (c->client_IP)
1197     {
1198         Z_OtherInformation **oi;
1199         yaz_oi_APDU(a, &oi);
1200         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
1201     }
1202     otherInfo_attach(c, a, out);
1203     if (!z_APDU(out, &a, 0, 0))
1204     {
1205         FILE *outf = fopen("/tmp/apdu.txt", "a");
1206         if (a && outf)
1207         {
1208             ODR odr_pr = odr_createmem(ODR_PRINT);
1209             fprintf(outf, "a=%p\n", a);
1210             odr_setprint(odr_pr, outf);
1211             z_APDU(odr_pr, &a, 0, 0);
1212             odr_destroy(odr_pr);
1213         }
1214         yaz_log(log_api, "%p encoding_APDU: encoding failed", c);
1215         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
1216         odr_reset(out);
1217         return -1;
1218     }
1219     yaz_log(log_details, "%p encoding_APDU encoding OK", c);
1220     return 0;
1221 }
1222
1223 static zoom_ret send_APDU(ZOOM_connection c, Z_APDU *a)
1224 {
1225     ZOOM_Event event;
1226     assert(a);
1227     if (encode_APDU(c, a, c->odr_out))
1228         return zoom_complete;
1229     yaz_log(log_details, "%p send APDU type=%d", c, a->which);
1230     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1231     event = ZOOM_Event_create(ZOOM_EVENT_SEND_APDU);
1232     ZOOM_connection_put_event(c, event);
1233     odr_reset(c->odr_out);
1234     return do_write(c);
1235 }
1236
1237 /* returns 1 if PDU was sent OK (still pending )
1238    0 if PDU was not sent OK (nothing to wait for)
1239 */
1240
1241 static zoom_ret ZOOM_connection_send_init(ZOOM_connection c)
1242 {
1243     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
1244     Z_InitRequest *ireq = apdu->u.initRequest;
1245     Z_IdAuthentication *auth = (Z_IdAuthentication *)
1246         odr_malloc(c->odr_out, sizeof(*auth));
1247     const char *auth_groupId = ZOOM_options_get(c->options, "group");
1248     const char *auth_userId = ZOOM_options_get(c->options, "user");
1249     const char *auth_password = ZOOM_options_get(c->options, "password");
1250     char *version;
1251
1252     /* support the pass for backwards compatibility */
1253     if (!auth_password)
1254         auth_password = ZOOM_options_get(c->options, "pass");
1255
1256     ODR_MASK_SET(ireq->options, Z_Options_search);
1257     ODR_MASK_SET(ireq->options, Z_Options_present);
1258     ODR_MASK_SET(ireq->options, Z_Options_scan);
1259     ODR_MASK_SET(ireq->options, Z_Options_sort);
1260     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
1261     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
1262
1263     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
1264     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
1265     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
1266
1267     /* Index Data's Z39.50 Implementor Id is 81 */
1268     ireq->implementationId =
1269         odr_prepend(c->odr_out,
1270                     ZOOM_options_get(c->options, "implementationId"),
1271                     odr_prepend(c->odr_out, "81", ireq->implementationId));
1272
1273     ireq->implementationName =
1274         odr_prepend(c->odr_out,
1275                     ZOOM_options_get(c->options, "implementationName"),
1276                     odr_prepend(c->odr_out, "ZOOM-C",
1277                                 ireq->implementationName));
1278
1279     version = odr_strdup(c->odr_out, "$Revision: 1.101 $");
1280     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
1281         version[strlen(version)-2] = '\0';
1282     ireq->implementationVersion =
1283         odr_prepend(c->odr_out,
1284                     ZOOM_options_get(c->options, "implementationVersion"),
1285                     odr_prepend(c->odr_out, &version[11],
1286                                 ireq->implementationVersion));
1287
1288     *ireq->maximumRecordSize =
1289         ZOOM_options_get_int(c->options, "maximumRecordSize", 1024*1024);
1290     *ireq->preferredMessageSize =
1291         ZOOM_options_get_int(c->options, "preferredMessageSize", 1024*1024);
1292
1293     if (auth_groupId || auth_password)
1294     {
1295         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
1296         int i = 0;
1297         pass->groupId = 0;
1298         if (auth_groupId && *auth_groupId)
1299         {
1300             pass->groupId = (char *)
1301                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
1302             strcpy(pass->groupId, auth_groupId);
1303             i++;
1304         }
1305         pass->userId = 0;
1306         if (auth_userId && *auth_userId)
1307         {
1308             pass->userId = (char *)
1309                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
1310             strcpy(pass->userId, auth_userId);
1311             i++;
1312         }
1313         pass->password = 0;
1314         if (auth_password && *auth_password)
1315         {
1316             pass->password = (char *)
1317                 odr_malloc(c->odr_out, strlen(auth_password)+1);
1318             strcpy(pass->password, auth_password);
1319             i++;
1320         }
1321         if (i)
1322         {
1323             auth->which = Z_IdAuthentication_idPass;
1324             auth->u.idPass = pass;
1325             ireq->idAuthentication = auth;
1326         }
1327     }
1328     else if (auth_userId)
1329     {
1330         auth->which = Z_IdAuthentication_open;
1331         auth->u.open = (char *)
1332             odr_malloc(c->odr_out, strlen(auth_userId)+1);
1333         strcpy(auth->u.open, auth_userId);
1334         ireq->idAuthentication = auth;
1335     }
1336     if (c->proxy)
1337         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
1338                                  VAL_PROXY, 1, c->host_port);
1339     if (c->charset || c->lang)
1340     {
1341         Z_OtherInformation **oi;
1342         Z_OtherInformationUnit *oi_unit;
1343
1344         yaz_oi_APDU(apdu, &oi);
1345
1346         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
1347         {
1348             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
1349             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
1350             oi_unit->information.externallyDefinedInfo =
1351                 yaz_set_proposal_charneg_list(c->odr_out, " ",
1352                                               c->charset, c->lang, 1);
1353         }
1354     }
1355     assert(apdu);
1356     return send_APDU(c, apdu);
1357 }
1358
1359 #if YAZ_HAVE_XML2
1360 static zoom_ret send_srw(ZOOM_connection c, Z_SRW_PDU *sr)
1361 {
1362     Z_GDU *gdu;
1363     ZOOM_Event event;
1364
1365     gdu = z_get_HTTP_Request_host_path(c->odr_out, c->host_port, c->path);
1366
1367     if (c->sru_mode == zoom_sru_get)
1368     {
1369         yaz_sru_get_encode(gdu->u.HTTP_Request, sr, c->odr_out, c->charset);
1370     }
1371     else if (c->sru_mode == zoom_sru_post)
1372     {
1373         yaz_sru_post_encode(gdu->u.HTTP_Request, sr, c->odr_out, c->charset);
1374     }
1375     else if (c->sru_mode == zoom_sru_soap)
1376     {
1377         yaz_sru_soap_encode(gdu->u.HTTP_Request, sr, c->odr_out, c->charset);
1378     }
1379     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1380         return zoom_complete;
1381     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1382
1383     event = ZOOM_Event_create(ZOOM_EVENT_SEND_APDU);
1384     ZOOM_connection_put_event(c, event);
1385     odr_reset(c->odr_out);
1386     return do_write(c);
1387 }
1388 #endif
1389
1390 #if YAZ_HAVE_XML2
1391 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1392 {
1393     int i;
1394     int *start, *count;
1395     ZOOM_resultset resultset = 0;
1396     Z_SRW_PDU *sr = 0;
1397     const char *option_val = 0;
1398
1399     if (c->error)                  /* don't continue on error */
1400         return zoom_complete;
1401     assert(c->tasks);
1402     switch(c->tasks->which)
1403     {
1404     case ZOOM_TASK_SEARCH:
1405         resultset = c->tasks->u.search.resultset;
1406         resultset->setname = xstrdup("default");
1407         ZOOM_options_set(resultset->options, "setname", resultset->setname);
1408         start = &c->tasks->u.search.start;
1409         count = &c->tasks->u.search.count;
1410         break;
1411     case ZOOM_TASK_RETRIEVE:
1412         resultset = c->tasks->u.retrieve.resultset;
1413
1414         start = &c->tasks->u.retrieve.start;
1415         count = &c->tasks->u.retrieve.count;
1416
1417         if (*start >= resultset->size)
1418             return zoom_complete;
1419         if (*start + *count > resultset->size)
1420             *count = resultset->size - *start;
1421
1422         for (i = 0; i < *count; i++)
1423         {
1424             ZOOM_record rec =
1425                 record_cache_lookup(resultset, i + *start,
1426                                     c->tasks->u.retrieve.syntax,
1427                                     c->tasks->u.retrieve.elementSetName);
1428             if (!rec)
1429                 break;
1430             else
1431             {
1432                 ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1433                 ZOOM_connection_put_event(c, event);
1434             }
1435         }
1436         *start += i;
1437         *count -= i;
1438
1439         if (*count == 0)
1440             return zoom_complete;
1441         break;
1442     default:
1443         return zoom_complete;
1444     }
1445     assert(resultset->query);
1446
1447     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1448
1449     if (resultset->query->z_query->which == Z_Query_type_104
1450         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1451     {
1452         sr->u.request->query_type = Z_SRW_query_type_cql;
1453         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1454     }
1455     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1456              resultset->query->z_query->u.type_1)
1457     {
1458         sr->u.request->query_type = Z_SRW_query_type_pqf;
1459         sr->u.request->query.pqf = resultset->query->query_string;
1460     }
1461     else
1462     {
1463         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1464         return zoom_complete;
1465     }
1466     sr->u.request->startRecord = odr_intdup(c->odr_out, *start + 1);
1467     sr->u.request->maximumRecords = odr_intdup(
1468         c->odr_out, resultset->step>0 ? resultset->step : *count);
1469     sr->u.request->recordSchema = resultset->schema;
1470
1471     option_val = ZOOM_resultset_option_get(resultset, "recordPacking");
1472     if (option_val)
1473         sr->u.request->recordPacking = odr_strdup(c->odr_out, option_val);
1474
1475     option_val = ZOOM_resultset_option_get(resultset, "extraArgs");
1476     if (option_val)
1477         sr->extra_args = odr_strdup(c->odr_out, option_val);
1478     return send_srw(c, sr);
1479 }
1480 #else
1481 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1482 {
1483     return zoom_complete;
1484 }
1485 #endif
1486
1487 static zoom_ret ZOOM_connection_send_search(ZOOM_connection c)
1488 {
1489     ZOOM_resultset r;
1490     int lslb, ssub, mspn;
1491     const char *syntax;
1492     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1493     Z_SearchRequest *search_req = apdu->u.searchRequest;
1494     const char *elementSetName;
1495     const char *smallSetElementSetName;
1496     const char *mediumSetElementSetName;
1497
1498     assert(c->tasks);
1499     assert(c->tasks->which == ZOOM_TASK_SEARCH);
1500
1501     r = c->tasks->u.search.resultset;
1502
1503     yaz_log(log_details, "%p ZOOM_connection_send_search set=%p", c, r);
1504
1505     elementSetName =
1506         ZOOM_options_get(r->options, "elementSetName");
1507     smallSetElementSetName  =
1508         ZOOM_options_get(r->options, "smallSetElementSetName");
1509     mediumSetElementSetName =
1510         ZOOM_options_get(r->options, "mediumSetElementSetName");
1511
1512     if (!smallSetElementSetName)
1513         smallSetElementSetName = elementSetName;
1514
1515     if (!mediumSetElementSetName)
1516         mediumSetElementSetName = elementSetName;
1517
1518     assert(r);
1519     assert(r->query);
1520
1521     /* prepare query for the search request */
1522     search_req->query = r->query->z_query;
1523     if (!search_req->query)
1524     {
1525         set_ZOOM_error(c, ZOOM_ERROR_INVALID_QUERY, 0);
1526         return zoom_complete;
1527     }
1528
1529     search_req->databaseNames = r->databaseNames;
1530     search_req->num_databaseNames = r->num_databaseNames;
1531
1532     /* get syntax (no need to provide unless piggyback is in effect) */
1533     syntax = c->tasks->u.search.syntax;
1534
1535     lslb = ZOOM_options_get_int(r->options, "largeSetLowerBound", -1);
1536     ssub = ZOOM_options_get_int(r->options, "smallSetUpperBound", -1);
1537     mspn = ZOOM_options_get_int(r->options, "mediumSetPresentNumber", -1);
1538     if (lslb != -1 && ssub != -1 && mspn != -1)
1539     {
1540         /* So're a Z39.50 expert? Let's hope you don't do sort */
1541         *search_req->largeSetLowerBound = lslb;
1542         *search_req->smallSetUpperBound = ssub;
1543         *search_req->mediumSetPresentNumber = mspn;
1544     }
1545     else if (c->tasks->u.search.start == 0 && c->tasks->u.search.count > 0
1546              && r->piggyback && !r->r_sort_spec && !r->schema)
1547     {
1548         /* Regular piggyback - do it unless we're going to do sort */
1549         *search_req->largeSetLowerBound = 2000000000;
1550         *search_req->smallSetUpperBound = 1;
1551         *search_req->mediumSetPresentNumber =
1552             r->step>0 ? r->step : c->tasks->u.search.count;
1553     }
1554     else
1555     {
1556         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1557         smallSetElementSetName = 0;
1558         mediumSetElementSetName = 0;
1559         syntax = 0;
1560     }
1561     if (smallSetElementSetName && *smallSetElementSetName)
1562     {
1563         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1564             odr_malloc(c->odr_out, sizeof(*esn));
1565
1566         esn->which = Z_ElementSetNames_generic;
1567         esn->u.generic = odr_strdup(c->odr_out, smallSetElementSetName);
1568         search_req->smallSetElementSetNames = esn;
1569     }
1570     if (mediumSetElementSetName && *mediumSetElementSetName)
1571     {
1572         Z_ElementSetNames *esn =(Z_ElementSetNames *)
1573             odr_malloc(c->odr_out, sizeof(*esn));
1574
1575         esn->which = Z_ElementSetNames_generic;
1576         esn->u.generic = odr_strdup(c->odr_out, mediumSetElementSetName);
1577         search_req->mediumSetElementSetNames = esn;
1578     }
1579     if (syntax)
1580         search_req->preferredRecordSyntax =
1581             yaz_str_to_z3950oid(c->odr_out, CLASS_RECSYN, syntax);
1582
1583     if (!r->setname)
1584     {
1585         if (c->support_named_resultsets)
1586         {
1587             char setname[14];
1588             int ord;
1589             /* find the lowest unused ordinal so that we re-use
1590                result sets on the server. */
1591             for (ord = 1; ; ord++)
1592             {
1593                 ZOOM_resultset rp;
1594                 sprintf(setname, "%d", ord);
1595                 for (rp = c->resultsets; rp; rp = rp->next)
1596                     if (rp->setname && !strcmp(rp->setname, setname))
1597                         break;
1598                 if (!rp)
1599                     break;
1600             }
1601             r->setname = xstrdup(setname);
1602             yaz_log(log_details, "%p ZOOM_connection_send_search: allocating "
1603                     "set %s", c, r->setname);
1604         }
1605         else
1606         {
1607             yaz_log(log_details, "%p ZOOM_connection_send_search: using "
1608                     "default set", c);
1609             r->setname = xstrdup("default");
1610         }
1611         ZOOM_options_set(r->options, "setname", r->setname);
1612     }
1613     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1614     return send_APDU(c, apdu);
1615 }
1616
1617 static void response_default_diag(ZOOM_connection c, Z_DefaultDiagFormat *r)
1618 {
1619     int oclass;
1620     char *addinfo = 0;
1621
1622     switch (r->which)
1623     {
1624     case Z_DefaultDiagFormat_v2Addinfo:
1625         addinfo = r->u.v2Addinfo;
1626         break;
1627     case Z_DefaultDiagFormat_v3Addinfo:
1628         addinfo = r->u.v3Addinfo;
1629         break;
1630     }
1631     xfree(c->addinfo);
1632     c->addinfo = 0;
1633     set_dset_error(c, *r->condition,
1634                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1635                    addinfo, 0);
1636 }
1637
1638 static void response_diag(ZOOM_connection c, Z_DiagRec *p)
1639 {
1640     if (p->which != Z_DiagRec_defaultFormat)
1641         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1642     else
1643         response_default_diag(c, p->u.defaultFormat);
1644 }
1645
1646 ZOOM_API(ZOOM_record)
1647     ZOOM_record_clone(ZOOM_record srec)
1648 {
1649     char *buf;
1650     int size;
1651     ODR odr_enc;
1652     ZOOM_record nrec;
1653
1654     odr_enc = odr_createmem(ODR_ENCODE);
1655     if (!z_NamePlusRecord(odr_enc, &srec->npr, 0, 0))
1656         return 0;
1657     buf = odr_getbuf(odr_enc, &size, 0);
1658
1659     nrec = (ZOOM_record) xmalloc(sizeof(*nrec));
1660     nrec->odr = odr_createmem(ODR_DECODE);
1661     nrec->wrbuf_marc = 0;
1662     nrec->wrbuf_iconv = 0;
1663     nrec->wrbuf_opac = 0;
1664     odr_setbuf(nrec->odr, buf, size, 0);
1665     z_NamePlusRecord(nrec->odr, &nrec->npr, 0, 0);
1666
1667     odr_destroy(odr_enc);
1668     return nrec;
1669 }
1670
1671 ZOOM_API(ZOOM_record)
1672     ZOOM_resultset_record_immediate(ZOOM_resultset s,size_t pos)
1673 {
1674     const char *syntax =
1675         ZOOM_options_get(s->options, "preferredRecordSyntax");
1676     const char *elementSetName =
1677         ZOOM_options_get(s->options, "elementSetName");
1678
1679     return record_cache_lookup(s, pos, syntax, elementSetName);
1680 }
1681
1682 ZOOM_API(ZOOM_record)
1683     ZOOM_resultset_record(ZOOM_resultset r, size_t pos)
1684 {
1685     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1686
1687     if (!rec)
1688     {
1689         /*
1690          * MIKE: I think force_sync should always be zero, but I don't
1691          * want to make this change until I get the go-ahead from
1692          * Adam, in case something depends on the old synchronous
1693          * behaviour.
1694          */
1695         int force_sync = 1;
1696         if (getenv("ZOOM_RECORD_NO_FORCE_SYNC")) force_sync = 0;
1697         ZOOM_resultset_retrieve(r, force_sync, pos, 1);
1698         rec = ZOOM_resultset_record_immediate(r, pos);
1699     }
1700     return rec;
1701 }
1702
1703 ZOOM_API(void)
1704     ZOOM_record_destroy(ZOOM_record rec)
1705 {
1706     if (!rec)
1707         return;
1708     if (rec->wrbuf_marc)
1709         wrbuf_free(rec->wrbuf_marc, 1);
1710     if (rec->wrbuf_iconv)
1711         wrbuf_free(rec->wrbuf_iconv, 1);
1712     if (rec->wrbuf_opac)
1713         wrbuf_free(rec->wrbuf_opac, 1);
1714     odr_destroy(rec->odr);
1715     xfree(rec);
1716 }
1717
1718 static const char *marc_iconv_return(ZOOM_record rec, int marc_type,
1719                                      int *len,
1720                                      const char *buf, int sz,
1721                                      const char *record_charset)
1722 {
1723     char to[40];
1724     char from[40];
1725     yaz_iconv_t cd = 0;
1726     yaz_marc_t mt = yaz_marc_create();
1727
1728     *from = '\0';
1729     strcpy(to, "UTF-8");
1730     if (record_charset && *record_charset)
1731     {
1732         /* Use "from,to" or just "from" */
1733         const char *cp = strchr(record_charset, ',');
1734         int clen = strlen(record_charset);
1735         if (cp && cp[1])
1736         {
1737             strncpy( to, cp+1, sizeof(to)-1);
1738             to[sizeof(to)-1] = '\0';
1739             clen = cp - record_charset;
1740         }
1741         if (clen > sizeof(from)-1)
1742             clen = sizeof(from)-1;
1743
1744         if (clen)
1745             strncpy(from, record_charset, clen);
1746         from[clen] = '\0';
1747     }
1748
1749     if (*from && *to)
1750     {
1751         cd = yaz_iconv_open(to, from);
1752         yaz_marc_iconv(mt, cd);
1753     }
1754
1755     yaz_marc_xml(mt, marc_type);
1756     if (!rec->wrbuf_marc)
1757         rec->wrbuf_marc = wrbuf_alloc();
1758     wrbuf_rewind(rec->wrbuf_marc);
1759     if (yaz_marc_decode_wrbuf(mt, buf, sz, rec->wrbuf_marc) > 0)
1760     {
1761         yaz_marc_destroy(mt);
1762         if (cd)
1763             yaz_iconv_close(cd);
1764         if (len)
1765             *len = wrbuf_len(rec->wrbuf_marc);
1766         return wrbuf_buf(rec->wrbuf_marc);
1767     }
1768     yaz_marc_destroy(mt);
1769     if (cd)
1770         yaz_iconv_close(cd);
1771     return 0;
1772 }
1773
1774 static const char *record_iconv_return(ZOOM_record rec, int *len,
1775                                        const char *buf, int sz,
1776                                        const char *record_charset)
1777 {
1778     char to[40];
1779     char from[40];
1780     yaz_iconv_t cd = 0;
1781
1782     *from = '\0';
1783     strcpy(to, "UTF-8");
1784     if (record_charset && *record_charset)
1785     {
1786         /* Use "from,to" or just "from" */
1787         const char *cp = strchr(record_charset, ',');
1788         int clen = strlen(record_charset);
1789         if (cp && cp[1])
1790         {
1791             strncpy( to, cp+1, sizeof(to)-1);
1792             to[sizeof(to)-1] = '\0';
1793             clen = cp - record_charset;
1794         }
1795         if (clen > sizeof(from)-1)
1796             clen = sizeof(from)-1;
1797
1798         if (clen)
1799             strncpy(from, record_charset, clen);
1800         from[clen] = '\0';
1801     }
1802
1803     if (*from && *to && (cd = yaz_iconv_open(to, from)))
1804     {
1805         char outbuf[12];
1806         size_t inbytesleft = sz;
1807         const char *inp = buf;
1808
1809         if (!rec->wrbuf_iconv)
1810             rec->wrbuf_iconv = wrbuf_alloc();
1811
1812         wrbuf_rewind(rec->wrbuf_iconv);
1813
1814         while (inbytesleft)
1815         {
1816             size_t outbytesleft = sizeof(outbuf);
1817             char *outp = outbuf;
1818             size_t r = yaz_iconv(cd, (char**) &inp,
1819                                  &inbytesleft,
1820                                  &outp, &outbytesleft);
1821             if (r == (size_t) (-1))
1822             {
1823                 int e = yaz_iconv_error(cd);
1824                 if (e != YAZ_ICONV_E2BIG)
1825                     break;
1826             }
1827             wrbuf_write(rec->wrbuf_iconv, outbuf, outp - outbuf);
1828         }
1829         wrbuf_puts(rec->wrbuf_iconv, "");
1830         buf = wrbuf_buf(rec->wrbuf_iconv);
1831         sz = wrbuf_len(rec->wrbuf_iconv);
1832         yaz_iconv_close(cd);
1833     }
1834     if (len)
1835         *len = sz;
1836     return buf;
1837 }
1838
1839 ZOOM_API(int)
1840     ZOOM_record_error(ZOOM_record rec, const char **cp,
1841                       const char **addinfo, const char **diagset)
1842 {
1843     Z_NamePlusRecord *npr;
1844
1845     if (!rec)
1846         return 0;
1847     npr = rec->npr;
1848     if (npr && npr->which == Z_NamePlusRecord_surrogateDiagnostic)
1849     {
1850         Z_DiagRec *diag_rec = npr->u.surrogateDiagnostic;
1851         int error = YAZ_BIB1_UNSPECIFIED_ERROR;
1852         const char *add = 0;
1853
1854         if (diag_rec->which == Z_DiagRec_defaultFormat)
1855         {
1856             Z_DefaultDiagFormat *ddf = diag_rec->u.defaultFormat;
1857             int oclass;
1858
1859             error = *ddf->condition;
1860             switch (ddf->which)
1861             {
1862             case Z_DefaultDiagFormat_v2Addinfo:
1863                 add = ddf->u.v2Addinfo;
1864                 break;
1865             case Z_DefaultDiagFormat_v3Addinfo:
1866                 add = ddf->u.v3Addinfo;
1867                 break;
1868             }
1869             if (diagset)
1870                 *diagset = yaz_z3950oid_to_str(ddf->diagnosticSetId, &oclass);
1871         }
1872         else
1873         {
1874             if (diagset)
1875                 *diagset = "Bib-1";
1876         }
1877         if (addinfo)
1878             *addinfo = add ? add : "";
1879         if (cp)
1880             *cp = diagbib1_str(error);
1881         return error;
1882     }
1883     return 0;
1884 }
1885
1886 ZOOM_API(const char *)
1887     ZOOM_record_get(ZOOM_record rec, const char *type_spec, int *len)
1888 {
1889     char type[40];
1890     char charset[40];
1891     char xpath[512];
1892     const char *cp;
1893     int i;
1894     Z_NamePlusRecord *npr;
1895
1896     if (len)
1897         *len = 0; /* default return */
1898
1899     if (!rec)
1900         return 0;
1901     npr = rec->npr;
1902     if (!npr)
1903         return 0;
1904
1905     cp = type_spec;
1906     for (i = 0; cp[i] && i < sizeof(type)-1; i++)
1907     {
1908         if (cp[i] == ';' || cp[i] == ' ')
1909             break;
1910         type[i] = cp[i];
1911     }
1912     type[i] = '\0';
1913     charset[0] = '\0';
1914     while (type_spec[i] == ';')
1915     {
1916         i++;
1917         while (type_spec[i] == ' ')
1918             i++;
1919         if (!strncmp(type_spec+i, "charset=", 8))
1920         {
1921             int j = 0;
1922             i = i + 8; /* skip charset= */
1923             for (j = 0; type_spec[i]  && j < sizeof(charset)-1; i++, j++)
1924             {
1925                 if (type_spec[i] == ';' || type_spec[i] == ' ')
1926                     break;
1927                 charset[j] = cp[i];
1928             }
1929             charset[j] = '\0';
1930         }
1931         else if (!strncmp(type_spec+i, "xpath=", 6))
1932         {
1933             int j = 0;
1934             i = i + 6;
1935             for (j = 0; type_spec[i] && j < sizeof(xpath)-1; i++, j++)
1936                 xpath[j] = cp[i];
1937             xpath[j] = '\0';
1938         }
1939         while (type_spec[i] == ' ')
1940             i++;
1941     }
1942     if (!strcmp(type, "database"))
1943     {
1944         if (len)
1945             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1946         return npr->databaseName;
1947     }
1948     else if (!strcmp(type, "syntax"))
1949     {
1950         const char *desc = 0;
1951         if (npr->which == Z_NamePlusRecord_databaseRecord)
1952         {
1953             Z_External *r = (Z_External *) npr->u.databaseRecord;
1954             oident *ent = oid_getentbyoid(r->direct_reference);
1955             if (ent)
1956                 desc = ent->desc;
1957         }
1958         if (!desc)
1959             desc = "none";
1960         if (len)
1961             *len = strlen(desc);
1962         return desc;
1963     }
1964     if (npr->which != Z_NamePlusRecord_databaseRecord)
1965         return 0;
1966
1967     /* from now on - we have a database record .. */
1968     if (!strcmp(type, "render"))
1969     {
1970         Z_External *r = (Z_External *) npr->u.databaseRecord;
1971         oident *ent = oid_getentbyoid(r->direct_reference);
1972
1973         /* render bibliographic record .. */
1974         if (r->which == Z_External_OPAC)
1975         {
1976             r = r->u.opac->bibliographicRecord;
1977             if (!r)
1978                 return 0;
1979             ent = oid_getentbyoid(r->direct_reference);
1980         }
1981         if (r->which == Z_External_sutrs)
1982             return record_iconv_return(rec, len,
1983                                        (char*) r->u.sutrs->buf,
1984                                        r->u.sutrs->len,
1985                                        charset);
1986         else if (r->which == Z_External_octet)
1987         {
1988             const char *ret_buf;
1989             switch (ent->value)
1990             {
1991             case VAL_SOIF:
1992             case VAL_HTML:
1993             case VAL_SUTRS:
1994                 break;
1995             case VAL_TEXT_XML:
1996             case VAL_APPLICATION_XML:
1997                 break;
1998             default:
1999                 ret_buf = marc_iconv_return(
2000                     rec, YAZ_MARC_LINE, len,
2001                     (const char *) r->u.octet_aligned->buf,
2002                     r->u.octet_aligned->len,
2003                     charset);
2004                 if (ret_buf)
2005                     return ret_buf;
2006             }
2007             return record_iconv_return(rec, len,
2008                                        (const char *) r->u.octet_aligned->buf,
2009                                        r->u.octet_aligned->len,
2010                                        charset);
2011         }
2012         else if (r->which == Z_External_grs1)
2013         {
2014             if (!rec->wrbuf_marc)
2015                 rec->wrbuf_marc = wrbuf_alloc();
2016             wrbuf_rewind(rec->wrbuf_marc);
2017             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
2018             return record_iconv_return(rec, len,
2019                                        wrbuf_buf(rec->wrbuf_marc),
2020                                        wrbuf_len(rec->wrbuf_marc),
2021                                        charset);
2022         }
2023         return 0;
2024     }
2025     else if (!strcmp(type, "xml"))
2026     {
2027         Z_External *r = (Z_External *) npr->u.databaseRecord;
2028         oident *ent = oid_getentbyoid(r->direct_reference);
2029
2030         /* render bibliographic record .. */
2031         if (r->which == Z_External_OPAC)
2032         {
2033             r = r->u.opac->bibliographicRecord;
2034             if (!r)
2035                 return 0;
2036             ent = oid_getentbyoid(r->direct_reference);
2037         }
2038
2039         if (r->which == Z_External_sutrs)
2040             return record_iconv_return(rec, len,
2041                                        (const char *) r->u.sutrs->buf,
2042                                        r->u.sutrs->len,
2043                                        charset);
2044         else if (r->which == Z_External_octet)
2045         {
2046             const char *ret_buf;
2047             int marc_decode_type = YAZ_MARC_MARCXML;
2048
2049             switch (ent->value)
2050             {
2051             case VAL_SOIF:
2052             case VAL_HTML:
2053             case VAL_SUTRS:
2054                 break;
2055             case VAL_TEXT_XML:
2056             case VAL_APPLICATION_XML:
2057                 break;
2058             default:
2059                 ret_buf = marc_iconv_return(
2060                     rec, marc_decode_type, len,
2061                     (const char *) r->u.octet_aligned->buf,
2062                     r->u.octet_aligned->len,
2063                     charset);
2064                 if (ret_buf)
2065                     return ret_buf;
2066             }
2067             return record_iconv_return(rec, len,
2068                                        (const char *) r->u.octet_aligned->buf,
2069                                        r->u.octet_aligned->len,
2070                                        charset);
2071         }
2072         else if (r->which == Z_External_grs1)
2073         {
2074             if (len) *len = 5;
2075             return "GRS-1";
2076         }
2077         return 0;
2078     }
2079     else if (!strcmp(type, "raw"))
2080     {
2081         Z_External *r = (Z_External *) npr->u.databaseRecord;
2082
2083         if (r->which == Z_External_sutrs)
2084         {
2085             if (len) *len = r->u.sutrs->len;
2086             return (const char *) r->u.sutrs->buf;
2087         }
2088         else if (r->which == Z_External_octet)
2089         {
2090             if (len) *len = r->u.octet_aligned->len;
2091             return (const char *) r->u.octet_aligned->buf;
2092         }
2093         else /* grs-1, explain, OPAC, ... */
2094         {
2095             if (len) *len = -1;
2096             return (const char *) npr->u.databaseRecord;
2097         }
2098         return 0;
2099     }
2100     else if (!strcmp (type, "ext"))
2101     {
2102         if (len) *len = -1;
2103         return (const char *) npr->u.databaseRecord;
2104     }
2105     else if (!strcmp (type, "opac"))
2106
2107     {
2108         Z_External *r = (Z_External *) npr->u.databaseRecord;
2109         if (r->which == Z_External_OPAC)
2110         {
2111             if (!rec->wrbuf_opac)
2112                 rec->wrbuf_opac = wrbuf_alloc();
2113             wrbuf_rewind(rec->wrbuf_opac);
2114             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
2115             return record_iconv_return(rec, len,
2116                                        wrbuf_buf(rec->wrbuf_opac),
2117                                        wrbuf_len(rec->wrbuf_opac),
2118                                        charset);
2119         }
2120     }
2121     return 0;
2122 }
2123
2124 static int strcmp_null(const char *v1, const char *v2)
2125 {
2126     if (!v1 && !v2)
2127         return 0;
2128     if (!v1 || !v2)
2129         return -1;
2130     return strcmp(v1, v2);
2131 }
2132
2133 static size_t record_hash(int pos)
2134 {
2135     if (pos < 0)
2136         pos = 0;
2137     return pos % RECORD_HASH_SIZE;
2138 }
2139
2140 static void record_cache_add(ZOOM_resultset r, Z_NamePlusRecord *npr,
2141                              int pos,
2142                              const char *syntax, const char *elementSetName)
2143 {
2144     ZOOM_record_cache rc;
2145
2146     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
2147     ZOOM_connection_put_event(r->connection, event);
2148
2149     for (rc = r->record_hash[record_hash(pos)]; rc; rc = rc->next)
2150     {
2151         if (pos == rc->pos)
2152         {
2153             if (strcmp_null(r->schema, rc->schema))
2154                 continue;
2155             if (strcmp_null(elementSetName,rc->elementSetName))
2156                 continue;
2157             if (strcmp_null(syntax, rc->syntax))
2158                 continue;
2159             /* not destroying rc->npr (it's handled by nmem )*/
2160             rc->rec.npr = npr;
2161             /* keeping wrbuf_marc too */
2162             return;
2163         }
2164     }
2165     rc = (ZOOM_record_cache) odr_malloc(r->odr, sizeof(*rc));
2166     rc->rec.npr = npr;
2167     rc->rec.odr = 0;
2168     rc->rec.wrbuf_marc = 0;
2169     rc->rec.wrbuf_iconv = 0;
2170     rc->rec.wrbuf_opac = 0;
2171     if (elementSetName)
2172         rc->elementSetName = odr_strdup(r->odr, elementSetName);
2173     else
2174         rc->elementSetName = 0;
2175
2176     if (syntax)
2177         rc->syntax = odr_strdup(r->odr, syntax);
2178     else
2179         rc->syntax = 0;
2180
2181     if (r->schema)
2182         rc->schema = odr_strdup(r->odr, r->schema);
2183     else
2184         rc->schema = 0;
2185
2186     rc->pos = pos;
2187     rc->next = r->record_hash[record_hash(pos)];
2188     r->record_hash[record_hash(pos)] = rc;
2189 }
2190
2191 static ZOOM_record record_cache_lookup(ZOOM_resultset r, int pos,
2192                                        const char *syntax,
2193                                        const char *elementSetName)
2194 {
2195     ZOOM_record_cache rc;
2196
2197     for (rc = r->record_hash[record_hash(pos)]; rc; rc = rc->next)
2198     {
2199         if (pos == rc->pos)
2200         {
2201             if (strcmp_null(r->schema, rc->schema))
2202                 continue;
2203             if (strcmp_null(elementSetName,rc->elementSetName))
2204                 continue;
2205             if (strcmp_null(syntax, rc->syntax))
2206                 continue;
2207             return &rc->rec;
2208         }
2209     }
2210     return 0;
2211 }
2212
2213 static void handle_records(ZOOM_connection c, Z_Records *sr,
2214                            int present_phase)
2215 {
2216     ZOOM_resultset resultset;
2217     int *start, *count;
2218     const char *syntax = 0, *elementSetName = 0;
2219
2220     if (!c->tasks)
2221         return ;
2222     switch (c->tasks->which)
2223     {
2224     case ZOOM_TASK_SEARCH:
2225         resultset = c->tasks->u.search.resultset;
2226         start = &c->tasks->u.search.start;
2227         count = &c->tasks->u.search.count;
2228         syntax = c->tasks->u.search.syntax;
2229         elementSetName = c->tasks->u.search.elementSetName;
2230         break;
2231     case ZOOM_TASK_RETRIEVE:
2232         resultset = c->tasks->u.retrieve.resultset;
2233         start = &c->tasks->u.retrieve.start;
2234         count = &c->tasks->u.retrieve.count;
2235         syntax = c->tasks->u.retrieve.syntax;
2236         elementSetName = c->tasks->u.retrieve.elementSetName;
2237         break;
2238     default:
2239         return;
2240     }
2241     if (sr && sr->which == Z_Records_NSD)
2242         response_default_diag(c, sr->u.nonSurrogateDiagnostic);
2243     else if (sr && sr->which == Z_Records_multipleNSD)
2244     {
2245         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
2246             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
2247         else
2248             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2249     }
2250     else
2251     {
2252         if (*count + *start > resultset->size)
2253             *count = resultset->size - *start;
2254         if (*count < 0)
2255             *count = 0;
2256         if (sr && sr->which == Z_Records_DBOSD)
2257         {
2258             int i;
2259             NMEM nmem = odr_extract_mem(c->odr_in);
2260             Z_NamePlusRecordList *p =
2261                 sr->u.databaseOrSurDiagnostics;
2262             for (i = 0; i<p->num_records; i++)
2263             {
2264                 record_cache_add(resultset, p->records[i], i + *start,
2265                                  syntax, elementSetName);
2266             }
2267             *count -= i;
2268             *start += i;
2269             yaz_log(log_details,
2270                     "handle_records resultset=%p start=%d count=%d",
2271                     resultset, *start, *count);
2272
2273             /* transfer our response to search_nmem .. we need it later */
2274             nmem_transfer(resultset->odr->mem, nmem);
2275             nmem_destroy(nmem);
2276             if (present_phase && p->num_records == 0)
2277             {
2278                 /* present response and we didn't get any records! */
2279                 Z_NamePlusRecord *myrec =
2280                     zget_surrogateDiagRec(resultset->odr, 0, 14, 0);
2281                 record_cache_add(resultset, myrec, *start,
2282                                  syntax, elementSetName);
2283             }
2284         }
2285         else if (present_phase)
2286         {
2287             /* present response and we didn't get any records! */
2288             Z_NamePlusRecord *myrec =
2289                 zget_surrogateDiagRec(resultset->odr, 0, 14, 0);
2290             record_cache_add(resultset, myrec, *start, syntax, elementSetName);
2291         }
2292     }
2293 }
2294
2295 static void handle_present_response(ZOOM_connection c, Z_PresentResponse *pr)
2296 {
2297     handle_records(c, pr->records, 1);
2298 }
2299
2300 static void handle_queryExpressionTerm(ZOOM_options opt, const char *name,
2301                                        Z_Term *term)
2302 {
2303     switch (term->which)
2304     {
2305     case Z_Term_general:
2306         ZOOM_options_setl(opt, name,
2307                           (const char *)(term->u.general->buf),
2308                           term->u.general->len);
2309         break;
2310     case Z_Term_characterString:
2311         ZOOM_options_set(opt, name, term->u.characterString);
2312         break;
2313     case Z_Term_numeric:
2314         ZOOM_options_set_int(opt, name, *term->u.numeric);
2315         break;
2316     }
2317 }
2318
2319 static void handle_queryExpression(ZOOM_options opt, const char *name,
2320                                    Z_QueryExpression *exp)
2321 {
2322     char opt_name[80];
2323
2324     switch (exp->which)
2325     {
2326     case Z_QueryExpression_term:
2327         if (exp->u.term && exp->u.term->queryTerm)
2328         {
2329             sprintf(opt_name, "%s.term", name);
2330             handle_queryExpressionTerm(opt, opt_name, exp->u.term->queryTerm);
2331         }
2332         break;
2333     case Z_QueryExpression_query:
2334         break;
2335     }
2336 }
2337
2338 static void handle_searchResult(ZOOM_connection c, ZOOM_resultset resultset,
2339                                 Z_OtherInformation *o)
2340 {
2341     int i;
2342     for (i = 0; o && i < o->num_elements; i++)
2343     {
2344         if (o->list[i]->which == Z_OtherInfo_externallyDefinedInfo)
2345         {
2346             Z_External *ext = o->list[i]->information.externallyDefinedInfo;
2347
2348             if (ext->which == Z_External_searchResult1)
2349             {
2350                 int j;
2351                 Z_SearchInfoReport *sr = ext->u.searchResult1;
2352
2353                 if (sr->num)
2354                     ZOOM_options_set_int(
2355                         resultset->options, "searchresult.size", sr->num);
2356
2357                 for (j = 0; j < sr->num; j++)
2358                 {
2359                     Z_SearchInfoReport_s *ent =
2360                         ext->u.searchResult1->elements[j];
2361                     char pref[80];
2362
2363                     sprintf(pref, "searchresult.%d", j);
2364
2365                     if (ent->subqueryId)
2366                     {
2367                         char opt_name[80];
2368                         sprintf(opt_name, "%s.id", pref);
2369                         ZOOM_options_set(resultset->options, opt_name,
2370                                          ent->subqueryId);
2371                     }
2372                     if (ent->subqueryExpression)
2373                     {
2374                         char opt_name[80];
2375                         sprintf(opt_name, "%s.subquery", pref);
2376                         handle_queryExpression(resultset->options, opt_name,
2377                                                ent->subqueryExpression);
2378                     }
2379                     if (ent->subqueryInterpretation)
2380                     {
2381                         char opt_name[80];
2382                         sprintf(opt_name, "%s.interpretation", pref);
2383                         handle_queryExpression(resultset->options, opt_name,
2384                                                ent->subqueryInterpretation);
2385                     }
2386                     if (ent->subqueryRecommendation)
2387                     {
2388                         char opt_name[80];
2389                         sprintf(opt_name, "%s.recommendation", pref);
2390                         handle_queryExpression(resultset->options, opt_name,
2391                                                ent->subqueryRecommendation);
2392                     }
2393                     if (ent->subqueryCount)
2394                     {
2395                         char opt_name[80];
2396                         sprintf(opt_name, "%s.count", pref);
2397                         ZOOM_options_set_int(resultset->options, opt_name,
2398                                              *ent->subqueryCount);
2399                     }
2400                 }
2401             }
2402         }
2403     }
2404 }
2405
2406 static void handle_search_response(ZOOM_connection c, Z_SearchResponse *sr)
2407 {
2408     ZOOM_resultset resultset;
2409     ZOOM_Event event;
2410
2411     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
2412         return ;
2413
2414     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2415     ZOOM_connection_put_event(c, event);
2416
2417     resultset = c->tasks->u.search.resultset;
2418
2419     handle_searchResult(c, resultset, sr->additionalSearchInfo);
2420
2421     resultset->size = *sr->resultCount;
2422     handle_records(c, sr->records, 0);
2423 }
2424
2425 static void sort_response(ZOOM_connection c, Z_SortResponse *res)
2426 {
2427     if (res->diagnostics && res->num_diagnostics > 0)
2428         response_diag(c, res->diagnostics[0]);
2429 }
2430
2431 static int scan_response(ZOOM_connection c, Z_ScanResponse *res)
2432 {
2433     NMEM nmem = odr_extract_mem(c->odr_in);
2434     ZOOM_scanset scan;
2435
2436     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
2437         return 0;
2438     scan = c->tasks->u.scan.scan;
2439
2440     if (res->entries && res->entries->nonsurrogateDiagnostics)
2441         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
2442     scan->scan_response = res;
2443     nmem_transfer(scan->odr->mem, nmem);
2444     if (res->stepSize)
2445         ZOOM_options_set_int(scan->options, "stepSize", *res->stepSize);
2446     if (res->positionOfTerm)
2447         ZOOM_options_set_int(scan->options, "position", *res->positionOfTerm);
2448     if (res->scanStatus)
2449         ZOOM_options_set_int(scan->options, "scanStatus", *res->scanStatus);
2450     if (res->numberOfEntriesReturned)
2451         ZOOM_options_set_int(scan->options, "number",
2452                              *res->numberOfEntriesReturned);
2453     nmem_destroy(nmem);
2454     return 1;
2455 }
2456
2457 static zoom_ret send_sort(ZOOM_connection c,
2458                           ZOOM_resultset resultset)
2459 {
2460     if (c->error)
2461         resultset->r_sort_spec = 0;
2462     if (resultset->r_sort_spec)
2463     {
2464         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
2465         Z_SortRequest *req = apdu->u.sortRequest;
2466
2467         req->num_inputResultSetNames = 1;
2468         req->inputResultSetNames = (Z_InternationalString **)
2469             odr_malloc(c->odr_out, sizeof(*req->inputResultSetNames));
2470         req->inputResultSetNames[0] =
2471             odr_strdup(c->odr_out, resultset->setname);
2472         req->sortedResultSetName = odr_strdup(c->odr_out, resultset->setname);
2473         req->sortSequence = resultset->r_sort_spec;
2474         resultset->r_sort_spec = 0;
2475         return send_APDU(c, apdu);
2476     }
2477     return zoom_complete;
2478 }
2479
2480 static zoom_ret send_present(ZOOM_connection c)
2481 {
2482     Z_APDU *apdu = 0;
2483     Z_PresentRequest *req = 0;
2484     int i = 0;
2485     const char *syntax = 0;
2486     const char *elementSetName = 0;
2487     ZOOM_resultset  resultset;
2488     int *start, *count;
2489
2490     if (!c->tasks)
2491     {
2492         yaz_log(log_details, "%p send_present no tasks", c);
2493         return zoom_complete;
2494     }
2495
2496     switch (c->tasks->which)
2497     {
2498     case ZOOM_TASK_SEARCH:
2499         resultset = c->tasks->u.search.resultset;
2500         start = &c->tasks->u.search.start;
2501         count = &c->tasks->u.search.count;
2502         syntax = c->tasks->u.search.syntax;
2503         elementSetName = c->tasks->u.search.elementSetName;
2504         break;
2505     case ZOOM_TASK_RETRIEVE:
2506         resultset = c->tasks->u.retrieve.resultset;
2507         start = &c->tasks->u.retrieve.start;
2508         count = &c->tasks->u.retrieve.count;
2509         syntax = c->tasks->u.retrieve.syntax;
2510         elementSetName = c->tasks->u.retrieve.elementSetName;
2511         break;
2512     default:
2513         return zoom_complete;
2514     }
2515     yaz_log(log_details, "%p send_present start=%d count=%d",
2516             c, *start, *count);
2517
2518     if (*start < 0 || *count < 0 || *start + *count > resultset->size)
2519     {
2520         set_dset_error(c, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, "Bib-1",
2521                        "", 0);
2522     }
2523     if (c->error)                  /* don't continue on error */
2524         return zoom_complete;
2525     yaz_log(log_details, "send_present resultset=%p start=%d count=%d",
2526             resultset, *start, *count);
2527
2528     for (i = 0; i < *count; i++)
2529     {
2530         ZOOM_record rec =
2531             record_cache_lookup(resultset, i + *start, syntax, elementSetName);
2532         if (!rec)
2533             break;
2534         else
2535         {
2536             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
2537             ZOOM_connection_put_event(c, event);
2538         }
2539     }
2540     *start += i;
2541     *count -= i;
2542
2543     if (*count == 0)
2544     {
2545         yaz_log(log_details, "%p send_present skip=%d no more to fetch", c, i);
2546         return zoom_complete;
2547     }
2548
2549     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
2550     req = apdu->u.presentRequest;
2551
2552     if (i)
2553         yaz_log(log_details, "%p send_present skip=%d", c, i);
2554
2555     *req->resultSetStartPoint = *start + 1;
2556     *req->numberOfRecordsRequested = resultset->step>0 ?
2557         resultset->step : *count;
2558     if (*req->numberOfRecordsRequested + *start > resultset->size)
2559         *req->numberOfRecordsRequested = resultset->size - *start;
2560     assert(*req->numberOfRecordsRequested > 0);
2561
2562     if (syntax && *syntax)
2563         req->preferredRecordSyntax =
2564             yaz_str_to_z3950oid(c->odr_out, CLASS_RECSYN, syntax);
2565
2566     if (resultset->schema && *resultset->schema)
2567     {
2568         Z_RecordComposition *compo = (Z_RecordComposition *)
2569             odr_malloc(c->odr_out, sizeof(*compo));
2570
2571         req->recordComposition = compo;
2572         compo->which = Z_RecordComp_complex;
2573         compo->u.complex = (Z_CompSpec *)
2574             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
2575         compo->u.complex->selectAlternativeSyntax = (bool_t *)
2576             odr_malloc(c->odr_out, sizeof(bool_t));
2577         *compo->u.complex->selectAlternativeSyntax = 0;
2578
2579         compo->u.complex->generic = (Z_Specification *)
2580             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
2581
2582         compo->u.complex->generic->which = Z_Schema_oid;
2583         compo->u.complex->generic->schema.oid = (Odr_oid *)
2584             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
2585
2586         if (!compo->u.complex->generic->schema.oid)
2587         {
2588             /* OID wasn't a schema! Try record syntax instead. */
2589
2590             compo->u.complex->generic->schema.oid = (Odr_oid *)
2591                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
2592         }
2593         if (elementSetName && *elementSetName)
2594         {
2595             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2596                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2597             compo->u.complex->generic->elementSpec->which =
2598                 Z_ElementSpec_elementSetName;
2599             compo->u.complex->generic->elementSpec->u.elementSetName =
2600                 odr_strdup(c->odr_out, elementSetName);
2601         }
2602         else
2603             compo->u.complex->generic->elementSpec = 0;
2604         compo->u.complex->num_dbSpecific = 0;
2605         compo->u.complex->dbSpecific = 0;
2606         compo->u.complex->num_recordSyntax = 0;
2607         compo->u.complex->recordSyntax = 0;
2608     }
2609     else if (elementSetName && *elementSetName)
2610     {
2611         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2612             odr_malloc(c->odr_out, sizeof(*esn));
2613         Z_RecordComposition *compo = (Z_RecordComposition *)
2614             odr_malloc(c->odr_out, sizeof(*compo));
2615
2616         esn->which = Z_ElementSetNames_generic;
2617         esn->u.generic = odr_strdup(c->odr_out, elementSetName);
2618         compo->which = Z_RecordComp_simple;
2619         compo->u.simple = esn;
2620         req->recordComposition = compo;
2621     }
2622     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2623     return send_APDU(c, apdu);
2624 }
2625
2626 ZOOM_API(ZOOM_scanset)
2627     ZOOM_connection_scan(ZOOM_connection c, const char *start)
2628 {
2629     ZOOM_scanset s;
2630     ZOOM_query q = ZOOM_query_create();
2631
2632     ZOOM_query_prefix(q, start);
2633
2634     s = ZOOM_connection_scan1(c, q);
2635     ZOOM_query_destroy(q);
2636     return s;
2637
2638 }
2639
2640 ZOOM_API(ZOOM_scanset)
2641     ZOOM_connection_scan1(ZOOM_connection c, ZOOM_query q)
2642 {
2643     char *start;
2644     char *freeme = 0;
2645     ZOOM_scanset scan = 0;
2646
2647     /*
2648      * We need to check the query-type, so we can recognise CQL and
2649      * CCL and compile them into a form that we can use here.  The
2650      * ZOOM_query structure has no explicit `type' member, but
2651      * inspection of the ZOOM_query_prefix() and ZOOM_query_cql()
2652      * functions shows how the structure is set up in each case.
2653      */
2654     if (!q->z_query)
2655         return 0;
2656     else if (q->z_query->which == Z_Query_type_1)
2657     {
2658         yaz_log(log_api, "%p ZOOM_connection_scan1 q=%p PQF '%s'",
2659                 c, q, q->query_string);
2660         start = q->query_string;
2661     }
2662     else if (q->z_query->which == Z_Query_type_104)
2663     {
2664         yaz_log(log_api, "%p ZOOM_connection_scan1 q=%p CQL '%s'",
2665                 c, q, q->query_string);
2666         start = freeme = cql2pqf(c, q->query_string);
2667         if (start == 0)
2668             return 0;
2669     }
2670     else
2671     {
2672         yaz_log(YLOG_FATAL, "%p ZOOM_connection_scan1 q=%p unknown type '%s'",
2673                 c, q, q->query_string);
2674         abort();
2675     }
2676
2677     scan = (ZOOM_scanset) xmalloc(sizeof(*scan));
2678     scan->connection = c;
2679     scan->odr = odr_createmem(ODR_DECODE);
2680     scan->options = ZOOM_options_create_with_parent(c->options);
2681     scan->refcount = 1;
2682     scan->scan_response = 0;
2683     scan->termListAndStartPoint =
2684         p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet, start);
2685     xfree(freeme);
2686
2687     scan->databaseNames = set_DatabaseNames(c, c->options,
2688                                             &scan->num_databaseNames,
2689                                             scan->odr);
2690     if (scan->termListAndStartPoint != 0)
2691     {
2692         ZOOM_task task = ZOOM_connection_add_task(c, ZOOM_TASK_SCAN);
2693         task->u.scan.scan = scan;
2694
2695         (scan->refcount)++;
2696         if (!c->async)
2697         {
2698             while (ZOOM_event(1, &c))
2699                 ;
2700         }
2701     }
2702     return scan;
2703 }
2704
2705 ZOOM_API(void)
2706     ZOOM_scanset_destroy(ZOOM_scanset scan)
2707 {
2708     if (!scan)
2709         return;
2710     (scan->refcount)--;
2711     if (scan->refcount == 0)
2712     {
2713         odr_destroy(scan->odr);
2714
2715         ZOOM_options_destroy(scan->options);
2716         xfree(scan);
2717     }
2718 }
2719
2720 static zoom_ret send_package(ZOOM_connection c)
2721 {
2722     ZOOM_Event event;
2723
2724     yaz_log(log_details, "%p send_package", c);
2725     if (!c->tasks)
2726         return zoom_complete;
2727     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2728
2729     event = ZOOM_Event_create(ZOOM_EVENT_SEND_APDU);
2730     ZOOM_connection_put_event(c, event);
2731
2732     c->buf_out = c->tasks->u.package->buf_out;
2733     c->len_out = c->tasks->u.package->len_out;
2734
2735     return do_write(c);
2736 }
2737
2738 static zoom_ret send_scan(ZOOM_connection c)
2739 {
2740     ZOOM_scanset scan;
2741     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2742     Z_ScanRequest *req = apdu->u.scanRequest;
2743
2744     yaz_log(log_details, "%p send_scan", c);
2745     if (!c->tasks)
2746         return zoom_complete;
2747     assert (c->tasks->which == ZOOM_TASK_SCAN);
2748     scan = c->tasks->u.scan.scan;
2749
2750     req->termListAndStartPoint = scan->termListAndStartPoint;
2751     req->attributeSet = scan->attributeSet;
2752
2753     *req->numberOfTermsRequested =
2754         ZOOM_options_get_int(scan->options, "number", 10);
2755
2756     req->preferredPositionInResponse =
2757         odr_intdup(c->odr_out,
2758                    ZOOM_options_get_int(scan->options, "position", 1));
2759
2760     req->stepSize =
2761         odr_intdup(c->odr_out,
2762                    ZOOM_options_get_int(scan->options, "stepSize", 0));
2763
2764     req->databaseNames = scan->databaseNames;
2765     req->num_databaseNames = scan->num_databaseNames;
2766
2767     return send_APDU(c, apdu);
2768 }
2769
2770 ZOOM_API(size_t)
2771     ZOOM_scanset_size(ZOOM_scanset scan)
2772 {
2773     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2774         return 0;
2775     return scan->scan_response->entries->num_entries;
2776 }
2777
2778 ZOOM_API(const char *)
2779     ZOOM_scanset_term(ZOOM_scanset scan, size_t pos,
2780                       int *occ, int *len)
2781 {
2782     const char *term = 0;
2783     size_t noent = ZOOM_scanset_size(scan);
2784     Z_ScanResponse *res = scan->scan_response;
2785
2786     *len = 0;
2787     *occ = 0;
2788     if (pos >= noent)
2789         return 0;
2790     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2791     {
2792         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2793
2794         if (t->term->which == Z_Term_general)
2795         {
2796             term = (const char *) t->term->u.general->buf;
2797             *len = t->term->u.general->len;
2798         }
2799         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2800     }
2801     return term;
2802 }
2803
2804 ZOOM_API(const char *)
2805     ZOOM_scanset_display_term(ZOOM_scanset scan, size_t pos,
2806                               int *occ, int *len)
2807 {
2808     const char *term = 0;
2809     size_t noent = ZOOM_scanset_size(scan);
2810     Z_ScanResponse *res = scan->scan_response;
2811
2812     *len = 0;
2813     *occ = 0;
2814     if (pos >= noent)
2815         return 0;
2816     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2817     {
2818         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2819
2820         if (t->displayTerm)
2821         {
2822             term = t->displayTerm;
2823             *len = strlen(term);
2824         }
2825         else if (t->term->which == Z_Term_general)
2826         {
2827             term = (const char *) t->term->u.general->buf;
2828             *len = t->term->u.general->len;
2829         }
2830         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2831     }
2832     return term;
2833 }
2834
2835 ZOOM_API(const char *)
2836     ZOOM_scanset_option_get(ZOOM_scanset scan, const char *key)
2837 {
2838     return ZOOM_options_get(scan->options, key);
2839 }
2840
2841 ZOOM_API(void)
2842     ZOOM_scanset_option_set(ZOOM_scanset scan, const char *key,
2843                             const char *val)
2844 {
2845     ZOOM_options_set(scan->options, key, val);
2846 }
2847
2848 static Z_APDU *create_es_package(ZOOM_package p, int type)
2849 {
2850     const char *str;
2851     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2852     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2853
2854     *req->function = Z_ExtendedServicesRequest_create;
2855
2856     str = ZOOM_options_get(p->options, "package-name");
2857     if (str && *str)
2858         req->packageName = nmem_strdup(p->odr_out->mem, str);
2859
2860     str = ZOOM_options_get(p->options, "user-id");
2861     if (str)
2862         req->userId = nmem_strdup(p->odr_out->mem, str);
2863
2864     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2865                                               type);
2866
2867     str = ZOOM_options_get(p->options, "function");
2868     if (str)
2869     {
2870         if (!strcmp (str, "create"))
2871             *req->function = 1;
2872         if (!strcmp (str, "delete"))
2873             *req->function = 2;
2874         if (!strcmp (str, "modify"))
2875             *req->function = 3;
2876     }
2877     return apdu;
2878 }
2879
2880 static const char *ill_array_lookup(void *clientData, const char *idx)
2881 {
2882     ZOOM_package p = (ZOOM_package) clientData;
2883     return ZOOM_options_get(p->options, idx+4);
2884 }
2885
2886 static Z_External *encode_ill_request(ZOOM_package p)
2887 {
2888     ODR out = p->odr_out;
2889     ILL_Request *req;
2890     Z_External *r = 0;
2891     struct ill_get_ctl ctl;
2892
2893     ctl.odr = p->odr_out;
2894     ctl.clientData = p;
2895     ctl.f = ill_array_lookup;
2896
2897     req = ill_get_ILLRequest(&ctl, "ill", 0);
2898
2899     if (!ill_Request(out, &req, 0, 0))
2900     {
2901         int ill_request_size;
2902         char *ill_request_buf = odr_getbuf(out, &ill_request_size, 0);
2903         if (ill_request_buf)
2904             odr_setbuf(out, ill_request_buf, ill_request_size, 1);
2905         return 0;
2906     }
2907     else
2908     {
2909         oident oid;
2910         int illRequest_size = 0;
2911         char *illRequest_buf = odr_getbuf(out, &illRequest_size, 0);
2912
2913         oid.proto = PROTO_GENERAL;
2914         oid.oclass = CLASS_GENERAL;
2915         oid.value = VAL_ISO_ILL_1;
2916
2917         r = (Z_External *) odr_malloc(out, sizeof(*r));
2918         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2919         r->indirect_reference = 0;
2920         r->descriptor = 0;
2921         r->which = Z_External_single;
2922
2923         r->u.single_ASN1_type =
2924             odr_create_Odr_oct(out,
2925                                (unsigned char *)illRequest_buf,
2926                                illRequest_size);
2927     }
2928     return r;
2929 }
2930
2931 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2932 {
2933     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc(p->odr_out, sizeof(*req));
2934     const char *str;
2935
2936     req->which = Z_IOItemOrder_esRequest;
2937     req->u.esRequest = (Z_IORequest *)
2938         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2939
2940     /* to keep part ... */
2941     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2942         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2943     req->u.esRequest->toKeep->supplDescription = 0;
2944     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2945         odr_malloc(p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2946
2947     str = ZOOM_options_get(p->options, "contact-name");
2948     req->u.esRequest->toKeep->contact->name = str ?
2949         nmem_strdup(p->odr_out->mem, str) : 0;
2950
2951     str = ZOOM_options_get(p->options, "contact-phone");
2952     req->u.esRequest->toKeep->contact->phone = str ?
2953         nmem_strdup(p->odr_out->mem, str) : 0;
2954
2955     str = ZOOM_options_get(p->options, "contact-email");
2956     req->u.esRequest->toKeep->contact->email = str ?
2957         nmem_strdup(p->odr_out->mem, str) : 0;
2958
2959     req->u.esRequest->toKeep->addlBilling = 0;
2960
2961     /* not to keep part ... */
2962     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2963         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2964
2965     str = ZOOM_options_get(p->options, "itemorder-setname");
2966     if (!str)
2967         str = "default";
2968
2969     if (!*str)
2970         req->u.esRequest->notToKeep->resultSetItem = 0;
2971     else
2972     {
2973         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2974             odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2975
2976         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2977             nmem_strdup(p->odr_out->mem, str);
2978         req->u.esRequest->notToKeep->resultSetItem->item =
2979             (int *) odr_malloc(p->odr_out, sizeof(int));
2980
2981         str = ZOOM_options_get(p->options, "itemorder-item");
2982         *req->u.esRequest->notToKeep->resultSetItem->item =
2983             (str ? atoi(str) : 1);
2984     }
2985     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2986
2987     return req;
2988 }
2989
2990 Z_APDU *create_admin_package(ZOOM_package p, int type,
2991                              Z_ESAdminOriginPartToKeep **toKeepP,
2992                              Z_ESAdminOriginPartNotToKeep **notToKeepP)
2993 {
2994     Z_APDU *apdu = create_es_package(p, VAL_ADMINSERVICE);
2995     if (apdu)
2996     {
2997         Z_ESAdminOriginPartToKeep  *toKeep;
2998         Z_ESAdminOriginPartNotToKeep  *notToKeep;
2999         Z_External *r = (Z_External *) odr_malloc(p->odr_out, sizeof(*r));
3000         const char *first_db = "Default";
3001         int num_db;
3002         char **db = set_DatabaseNames(p->connection, p->options, &num_db,
3003                                       p->odr_out);
3004         if (num_db > 0)
3005             first_db = db[0];
3006
3007         r->direct_reference =
3008             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
3009                                    VAL_ADMINSERVICE);
3010         r->descriptor = 0;
3011         r->indirect_reference = 0;
3012         r->which = Z_External_ESAdmin;
3013
3014         r->u.adminService = (Z_Admin *)
3015             odr_malloc(p->odr_out, sizeof(*r->u.adminService));
3016         r->u.adminService->which = Z_Admin_esRequest;
3017         r->u.adminService->u.esRequest = (Z_AdminEsRequest *)
3018             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest));
3019
3020         toKeep = r->u.adminService->u.esRequest->toKeep =
3021             (Z_ESAdminOriginPartToKeep *)
3022             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest->toKeep));
3023         toKeep->which = type;
3024         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
3025         toKeep->u.create = odr_nullval();
3026         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
3027
3028         r->u.adminService->u.esRequest->notToKeep = notToKeep =
3029             (Z_ESAdminOriginPartNotToKeep *)
3030             odr_malloc(p->odr_out,
3031                        sizeof(*r->u.adminService->u.esRequest->notToKeep));
3032         notToKeep->which = Z_ESAdminOriginPartNotToKeep_recordsWillFollow;
3033         notToKeep->u.recordsWillFollow = odr_nullval();
3034         if (toKeepP)
3035             *toKeepP = toKeep;
3036         if (notToKeepP)
3037             *notToKeepP = notToKeep;
3038     }
3039     return apdu;
3040 }
3041
3042 static Z_APDU *create_xmlupdate_package(ZOOM_package p)
3043 {
3044     Z_APDU *apdu = create_es_package(p, VAL_XMLES);
3045     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
3046     Z_External *ext = (Z_External *) odr_malloc(p->odr_out, sizeof(*ext));
3047     const char *doc = ZOOM_options_get(p->options, "doc");
3048
3049     if (!doc)
3050         doc = "";
3051
3052     req->taskSpecificParameters = ext;
3053     ext->direct_reference = req->packageType;
3054     ext->descriptor = 0;
3055     ext->indirect_reference = 0;
3056
3057     ext->which = Z_External_octet;
3058     ext->u.single_ASN1_type =
3059         odr_create_Odr_oct(p->odr_out, (const unsigned char *) doc,
3060                            strlen(doc));
3061     return apdu;
3062 }
3063
3064 static Z_APDU *create_update_package(ZOOM_package p)
3065 {
3066     Z_APDU *apdu = 0;
3067     const char *first_db = "Default";
3068     int num_db;
3069     char **db = set_DatabaseNames(p->connection, p->options, &num_db, p->odr_out);
3070     const char *action = ZOOM_options_get(p->options, "action");
3071     const char *recordIdOpaque = ZOOM_options_get(p->options, "recordIdOpaque");
3072     const char *recordIdNumber = ZOOM_options_get(p->options, "recordIdNumber");
3073     const char *record_buf = ZOOM_options_get(p->options, "record");
3074     const char *syntax_str = ZOOM_options_get(p->options, "syntax");
3075     int syntax_oid = VAL_NONE;
3076     int action_no = -1;
3077
3078     if (syntax_str)
3079         syntax_oid = oid_getvalbyname(syntax_str);
3080     if (!record_buf)
3081     {
3082         record_buf = "void";
3083         syntax_oid = VAL_SUTRS;
3084     }
3085     if (syntax_oid == VAL_NONE)
3086         syntax_oid = VAL_TEXT_XML;
3087
3088     if (num_db > 0)
3089         first_db = db[0];
3090
3091     if (!action)
3092         action = "specialUpdate";
3093
3094     if (!strcmp(action, "recordInsert"))
3095         action_no = Z_IUOriginPartToKeep_recordInsert;
3096     else if (!strcmp(action, "recordReplace"))
3097         action_no = Z_IUOriginPartToKeep_recordReplace;
3098     else if (!strcmp(action, "recordDelete"))
3099         action_no = Z_IUOriginPartToKeep_recordDelete;
3100     else if (!strcmp(action, "elementUpdate"))
3101         action_no = Z_IUOriginPartToKeep_elementUpdate;
3102     else if (!strcmp(action, "specialUpdate"))
3103         action_no = Z_IUOriginPartToKeep_specialUpdate;
3104     else
3105         return 0;
3106
3107     apdu = create_es_package(p, VAL_DBUPDATE);
3108     if (apdu)
3109     {
3110         Z_IUOriginPartToKeep *toKeep;
3111         Z_IUSuppliedRecords *notToKeep;
3112         Z_External *r = (Z_External *)
3113             odr_malloc(p->odr_out, sizeof(*r));
3114
3115         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
3116
3117         r->direct_reference =
3118             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
3119                                    VAL_DBUPDATE);
3120         r->descriptor = 0;
3121         r->which = Z_External_update;
3122         r->indirect_reference = 0;
3123         r->u.update = (Z_IUUpdate *)
3124             odr_malloc(p->odr_out, sizeof(*r->u.update));
3125
3126         r->u.update->which = Z_IUUpdate_esRequest;
3127         r->u.update->u.esRequest = (Z_IUUpdateEsRequest *)
3128             odr_malloc(p->odr_out, sizeof(*r->u.update->u.esRequest));
3129         toKeep = r->u.update->u.esRequest->toKeep =
3130             (Z_IUOriginPartToKeep *)
3131             odr_malloc(p->odr_out, sizeof(*toKeep));
3132
3133         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
3134         toKeep->schema = 0;
3135         toKeep->elementSetName = 0;
3136         toKeep->actionQualifier = 0;
3137         toKeep->action = odr_intdup(p->odr_out, action_no);
3138
3139         notToKeep = r->u.update->u.esRequest->notToKeep =
3140             (Z_IUSuppliedRecords *)
3141             odr_malloc(p->odr_out, sizeof(*notToKeep));
3142         notToKeep->num = 1;
3143         notToKeep->elements = (Z_IUSuppliedRecords_elem **)
3144             odr_malloc(p->odr_out, sizeof(*notToKeep->elements));
3145         notToKeep->elements[0] = (Z_IUSuppliedRecords_elem *)
3146             odr_malloc(p->odr_out, sizeof(**notToKeep->elements));
3147         notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_opaque;
3148         if (recordIdOpaque)
3149         {
3150             notToKeep->elements[0]->u.opaque =
3151                 odr_create_Odr_oct(p->odr_out,
3152                                    (const unsigned char *) recordIdOpaque,
3153                                    strlen(recordIdOpaque));
3154         }
3155         else if (recordIdNumber)
3156         {
3157             notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_number;
3158
3159             notToKeep->elements[0]->u.number =
3160                 odr_intdup(p->odr_out, atoi(recordIdNumber));
3161         }
3162         else
3163             notToKeep->elements[0]->u.opaque = 0;
3164         notToKeep->elements[0]->supplementalId = 0;
3165         notToKeep->elements[0]->correlationInfo = 0;
3166         notToKeep->elements[0]->record =
3167             z_ext_record(p->odr_out, syntax_oid,
3168                          record_buf, strlen(record_buf));
3169     }
3170     if (0 && apdu)
3171     {
3172         ODR print = odr_createmem(ODR_PRINT);
3173
3174         z_APDU(print, &apdu, 0, 0);
3175         odr_destroy(print);
3176     }
3177     return apdu;
3178 }
3179
3180 ZOOM_API(void)
3181     ZOOM_package_send(ZOOM_package p, const char *type)
3182 {
3183     Z_APDU *apdu = 0;
3184     ZOOM_connection c;
3185     if (!p)
3186         return;
3187     c = p->connection;
3188     odr_reset(p->odr_out);
3189     xfree(p->buf_out);
3190     p->buf_out = 0;
3191     if (!strcmp(type, "itemorder"))
3192     {
3193         apdu = create_es_package(p, VAL_ITEMORDER);
3194         if (apdu)
3195         {
3196             Z_External *r = (Z_External *) odr_malloc(p->odr_out, sizeof(*r));
3197
3198             r->direct_reference =
3199                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
3200                                        VAL_ITEMORDER);
3201             r->descriptor = 0;
3202             r->which = Z_External_itemOrder;
3203             r->indirect_reference = 0;
3204             r->u.itemOrder = encode_item_order(p);
3205
3206             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
3207         }
3208     }
3209     else if (!strcmp(type, "create"))  /* create database */
3210     {
3211         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_create,
3212                                     0, 0);
3213     }
3214     else if (!strcmp(type, "drop"))  /* drop database */
3215     {
3216         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_drop,
3217                                     0, 0);
3218     }
3219     else if (!strcmp(type, "commit"))  /* commit changes */
3220     {
3221         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_commit,
3222                                     0, 0);
3223     }
3224     else if (!strcmp(type, "update")) /* update record(s) */
3225     {
3226         apdu = create_update_package(p);
3227     }
3228     else if (!strcmp(type, "xmlupdate"))
3229     {
3230         apdu = create_xmlupdate_package(p);
3231     }
3232     if (apdu)
3233     {
3234         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
3235         {
3236             char *buf;
3237
3238             ZOOM_task task = ZOOM_connection_add_task(c, ZOOM_TASK_PACKAGE);
3239             task->u.package = p;
3240             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
3241             p->buf_out = (char *) xmalloc(p->len_out);
3242             memcpy(p->buf_out, buf, p->len_out);
3243
3244             (p->refcount)++;
3245             if (!c->async)
3246             {
3247                 while (ZOOM_event(1, &c))
3248                     ;
3249             }
3250         }
3251     }
3252 }
3253
3254 ZOOM_API(ZOOM_package)
3255     ZOOM_connection_package(ZOOM_connection c, ZOOM_options options)
3256 {
3257     ZOOM_package p = (ZOOM_package) xmalloc(sizeof(*p));
3258
3259     p->connection = c;
3260     p->odr_out = odr_createmem(ODR_ENCODE);
3261     p->options = ZOOM_options_create_with_parent2(options, c->options);
3262     p->refcount = 1;
3263     p->buf_out = 0;
3264     p->len_out = 0;
3265     return p;
3266 }
3267
3268 ZOOM_API(void)
3269     ZOOM_package_destroy(ZOOM_package p)
3270 {
3271     if (!p)
3272         return;
3273     (p->refcount)--;
3274     if (p->refcount == 0)
3275     {
3276         odr_destroy(p->odr_out);
3277         xfree(p->buf_out);
3278
3279         ZOOM_options_destroy(p->options);
3280         xfree(p);
3281     }
3282 }
3283
3284 ZOOM_API(const char *)
3285     ZOOM_package_option_get(ZOOM_package p, const char *key)
3286 {
3287     return ZOOM_options_get(p->options, key);
3288 }
3289
3290
3291 ZOOM_API(void)
3292     ZOOM_package_option_set(ZOOM_package p, const char *key,
3293                             const char *val)
3294 {
3295     ZOOM_options_set(p->options, key, val);
3296 }
3297
3298 static int ZOOM_connection_exec_task(ZOOM_connection c)
3299 {
3300     ZOOM_task task = c->tasks;
3301     zoom_ret ret = zoom_complete;
3302
3303     if (!task)
3304         return 0;
3305     yaz_log(log_details, "%p ZOOM_connection_exec_task type=%d run=%d",
3306             c, task->which, task->running);
3307     if (c->error != ZOOM_ERROR_NONE)
3308     {
3309         yaz_log(log_details, "%p ZOOM_connection_exec_task "
3310                 "removing tasks because of error = %d", c, c->error);
3311         ZOOM_connection_remove_tasks(c);
3312         return 0;
3313     }
3314     if (task->running)
3315     {
3316         yaz_log(log_details, "%p ZOOM_connection_exec_task "
3317                 "task already running", c);
3318         return 0;
3319     }
3320     task->running = 1;
3321     ret = zoom_complete;
3322     if (c->cs || task->which == ZOOM_TASK_CONNECT)
3323     {
3324         switch (task->which)
3325         {
3326         case ZOOM_TASK_SEARCH:
3327             if (c->proto == PROTO_HTTP)
3328                 ret = ZOOM_connection_srw_send_search(c);
3329             else
3330                 ret = ZOOM_connection_send_search(c);
3331             break;
3332         case ZOOM_TASK_RETRIEVE:
3333             if (c->proto == PROTO_HTTP)
3334                 ret = ZOOM_connection_srw_send_search(c);
3335             else
3336                 ret = send_present(c);
3337             break;
3338         case ZOOM_TASK_CONNECT:
3339             ret = do_connect(c);
3340             break;
3341         case ZOOM_TASK_SCAN:
3342             ret = send_scan(c);
3343             break;
3344         case ZOOM_TASK_PACKAGE:
3345             ret = send_package(c);
3346             break;
3347         case ZOOM_TASK_SORT:
3348             c->tasks->u.sort.resultset->r_sort_spec =
3349                 c->tasks->u.sort.q->sort_spec;
3350             ret = send_sort(c, c->tasks->u.sort.resultset);
3351             break;
3352         }
3353     }
3354     else
3355     {
3356         yaz_log(log_details, "%p ZOOM_connection_exec_task "
3357                 "remove tasks because no connection exist", c);
3358         ZOOM_connection_remove_tasks(c);
3359     }
3360     if (ret == zoom_complete)
3361     {
3362         yaz_log(log_details, "%p ZOOM_connection_exec_task "
3363                 "task removed (complete)", c);
3364         ZOOM_connection_remove_task(c);
3365         return 0;
3366     }
3367     yaz_log(log_details, "%p ZOOM_connection_exec_task "
3368             "task pending", c);
3369     return 1;
3370 }
3371
3372 static zoom_ret send_sort_present(ZOOM_connection c)
3373 {
3374     zoom_ret r = zoom_complete;
3375
3376     if (c->tasks && c->tasks->which == ZOOM_TASK_SEARCH)
3377         r = send_sort(c, c->tasks->u.search.resultset);
3378     if (r == zoom_complete)
3379         r = send_present(c);
3380     return r;
3381 }
3382
3383 static int es_response(ZOOM_connection c,
3384                        Z_ExtendedServicesResponse *res)
3385 {
3386     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
3387         return 0;
3388     if (res->diagnostics && res->num_diagnostics > 0)
3389         response_diag(c, res->diagnostics[0]);
3390     if (res->taskPackage &&
3391         res->taskPackage->which == Z_External_extendedService)
3392     {
3393         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
3394         Odr_oct *id = taskPackage->targetReference;
3395
3396         if (id)
3397             ZOOM_options_setl(c->tasks->u.package->options,
3398                               "targetReference", (char*) id->buf, id->len);
3399     }
3400     if (res->taskPackage &&
3401         res->taskPackage->which == Z_External_octet)
3402     {
3403         Odr_oct *doc = res->taskPackage->u.octet_aligned;
3404         ZOOM_options_setl(c->tasks->u.package->options,
3405                           "xmlUpdateDoc", (char*) doc->buf, doc->len);
3406     }
3407     return 1;
3408 }
3409
3410 static void interpret_init_diag(ZOOM_connection c,
3411                                 Z_DiagnosticFormat *diag)
3412 {
3413     if (diag->num > 0)
3414     {
3415         Z_DiagnosticFormat_s *ds = diag->elements[0];
3416         if (ds->which == Z_DiagnosticFormat_s_defaultDiagRec)
3417             response_default_diag(c, ds->u.defaultDiagRec);
3418     }
3419 }
3420
3421
3422 static void interpret_otherinformation_field(ZOOM_connection c,
3423                                              Z_OtherInformation *ui)
3424 {
3425     int i;
3426     for (i = 0; i < ui->num_elements; i++)
3427     {
3428         Z_OtherInformationUnit *unit = ui->list[i];
3429         if (unit->which == Z_OtherInfo_externallyDefinedInfo &&
3430             unit->information.externallyDefinedInfo &&
3431             unit->information.externallyDefinedInfo->which ==
3432             Z_External_diag1)
3433         {
3434             interpret_init_diag(c, unit->information.externallyDefinedInfo->u.diag1);
3435         }
3436     }
3437 }
3438
3439
3440 static void set_init_option(const char *name, void *clientData) {
3441     ZOOM_connection c = clientData;
3442     char buf[80];
3443
3444     sprintf(buf, "init_opt_%.70s", name);
3445     ZOOM_connection_option_set(c, buf, "1");
3446 }
3447
3448
3449 static void recv_apdu(ZOOM_connection c, Z_APDU *apdu)
3450 {
3451     Z_InitResponse *initrs;
3452
3453     c->mask = 0;
3454     yaz_log(log_details, "%p recv_apdu apdu->which=%d", c, apdu->which);
3455     switch(apdu->which)
3456     {
3457     case Z_APDU_initResponse:
3458         yaz_log(log_api, "%p recv_apd: Received Init response", c);
3459         initrs = apdu->u.initResponse;
3460         ZOOM_connection_option_set(c, "serverImplementationId",
3461                                    initrs->implementationId ?
3462                                    initrs->implementationId : "");
3463         ZOOM_connection_option_set(c, "serverImplementationName",
3464                                    initrs->implementationName ?
3465                                    initrs->implementationName : "");
3466         ZOOM_connection_option_set(c, "serverImplementationVersion",
3467                                    initrs->implementationVersion ?
3468                                    initrs->implementationVersion : "");
3469         /* Set the three old options too, for old applications */
3470         ZOOM_connection_option_set(c, "targetImplementationId",
3471                                    initrs->implementationId ?
3472                                    initrs->implementationId : "");
3473         ZOOM_connection_option_set(c, "targetImplementationName",
3474                                    initrs->implementationName ?
3475                                    initrs->implementationName : "");
3476         ZOOM_connection_option_set(c, "targetImplementationVersion",
3477                                    initrs->implementationVersion ?
3478                                    initrs->implementationVersion : "");
3479
3480         /* Make initrs->options available as ZOOM-level options */
3481         yaz_init_opt_decode(initrs->options, set_init_option, (void*) c);
3482
3483         if (!*initrs->result)
3484         {
3485             Z_External *uif = initrs->userInformationField;
3486
3487             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0); /* default error */
3488
3489             if (uif && uif->which == Z_External_userInfo1)
3490                 interpret_otherinformation_field(c, uif->u.userInfo1);
3491         }
3492         else
3493         {
3494             char *cookie =
3495                 yaz_oi_get_string_oidval(&apdu->u.initResponse->otherInfo,
3496                                          VAL_COOKIE, 1, 0);
3497             xfree(c->cookie_in);
3498             c->cookie_in = 0;
3499             if (cookie)
3500                 c->cookie_in = xstrdup(cookie);
3501             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
3502                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
3503                 c->support_named_resultsets = 1;
3504             if (c->tasks)
3505             {
3506                 assert(c->tasks->which == ZOOM_TASK_CONNECT);
3507                 ZOOM_connection_remove_task(c);
3508             }
3509             ZOOM_connection_exec_task(c);
3510         }
3511         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
3512         {
3513             NMEM tmpmem = nmem_create();
3514             Z_CharSetandLanguageNegotiation *p =
3515                 yaz_get_charneg_record(initrs->otherInfo);
3516
3517             if (p)
3518             {
3519                 char *charset = NULL, *lang = NULL;
3520                 int sel;
3521
3522                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
3523                 yaz_log(log_details, "%p recv_apdu target accepted: "
3524                         "charset %s, language %s, select %d",
3525                         c,
3526                         charset ? charset : "none", lang ? lang : "none", sel);
3527                 if (charset)
3528                     ZOOM_connection_option_set(c, "negotiation-charset",
3529                                                charset);
3530                 if (lang)
3531                     ZOOM_connection_option_set(c, "negotiation-lang",
3532                                                lang);
3533
3534                 ZOOM_connection_option_set(
3535                     c,  "negotiation-charset-in-effect-for-records",
3536                     (sel != 0) ? "1" : "0");
3537                 nmem_destroy(tmpmem);
3538             }
3539         }
3540         break;
3541     case Z_APDU_searchResponse:
3542         yaz_log(log_api, "%p recv_apdu Search response", c);
3543         handle_search_response(c, apdu->u.searchResponse);
3544         if (send_sort_present(c) == zoom_complete)
3545             ZOOM_connection_remove_task(c);
3546         break;
3547     case Z_APDU_presentResponse:
3548         yaz_log(log_api, "%p recv_apdu Present response", c);
3549         handle_present_response(c, apdu->u.presentResponse);
3550         if (send_present(c) == zoom_complete)
3551             ZOOM_connection_remove_task(c);
3552         break;
3553     case Z_APDU_sortResponse:
3554         yaz_log(log_api, "%p recv_apdu Sort response", c);
3555         sort_response(c, apdu->u.sortResponse);
3556         if (send_present(c) == zoom_complete)
3557             ZOOM_connection_remove_task(c);
3558         break;
3559     case Z_APDU_scanResponse:
3560         yaz_log(log_api, "%p recv_apdu Scan response", c);
3561         scan_response(c, apdu->u.scanResponse);
3562         ZOOM_connection_remove_task(c);
3563         break;
3564     case Z_APDU_extendedServicesResponse:
3565         yaz_log(log_api, "%p recv_apdu Extended Services response", c);
3566         es_response(c, apdu->u.extendedServicesResponse);
3567         ZOOM_connection_remove_task(c);
3568         break;
3569     case Z_APDU_close:
3570         yaz_log(log_api, "%p recv_apdu Close PDU", c);
3571         if (!ZOOM_test_reconnect(c))
3572         {
3573             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, c->host_port);
3574             do_close(c);
3575         }
3576         break;
3577     default:
3578         yaz_log(log_api, "%p Received unknown PDU", c);
3579         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3580         do_close(c);
3581     }
3582 }
3583
3584 #if YAZ_HAVE_XML2
3585 static void handle_srw_response(ZOOM_connection c,
3586                                 Z_SRW_searchRetrieveResponse *res)
3587 {
3588     ZOOM_resultset resultset = 0;
3589     int i;
3590     NMEM nmem;
3591     ZOOM_Event event;
3592     int *start;
3593     const char *syntax, *elementSetName;
3594
3595     if (!c->tasks)
3596         return;
3597
3598     switch(c->tasks->which)
3599     {
3600     case ZOOM_TASK_SEARCH:
3601         resultset = c->tasks->u.search.resultset;
3602         start = &c->tasks->u.search.start;
3603         syntax = c->tasks->u.search.syntax;
3604         elementSetName = c->tasks->u.search.elementSetName;
3605         break;
3606     case ZOOM_TASK_RETRIEVE:
3607         resultset = c->tasks->u.retrieve.resultset;
3608         start = &c->tasks->u.retrieve.start;
3609         syntax = c->tasks->u.retrieve.syntax;
3610         elementSetName = c->tasks->u.retrieve.elementSetName;
3611         break;
3612     default:
3613         return;
3614     }
3615     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
3616     ZOOM_connection_put_event(c, event);
3617
3618     resultset->size = 0;
3619
3620     yaz_log(log_details, "%p handle_srw_response got SRW response OK", c);
3621
3622     if (res->numberOfRecords)
3623         resultset->size = *res->numberOfRecords;
3624
3625     for (i = 0; i<res->num_records; i++)
3626     {
3627         int pos;
3628
3629         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
3630             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
3631
3632         if (res->records[i].recordPosition &&
3633             *res->records[i].recordPosition > 0)
3634             pos = *res->records[i].recordPosition - 1;
3635         else
3636             pos = *start + i;
3637
3638         npr->databaseName = 0;
3639         npr->which = Z_NamePlusRecord_databaseRecord;
3640         npr->u.databaseRecord = (Z_External *)
3641             odr_malloc(c->odr_in, sizeof(Z_External));
3642         npr->u.databaseRecord->descriptor = 0;
3643         npr->u.databaseRecord->direct_reference =
3644             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
3645         npr->u.databaseRecord->which = Z_External_octet;
3646
3647         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
3648             odr_malloc(c->odr_in, sizeof(Odr_oct));
3649         npr->u.databaseRecord->u.octet_aligned->buf = (unsigned char*)
3650             res->records[i].recordData_buf;
3651         npr->u.databaseRecord->u.octet_aligned->len =
3652             npr->u.databaseRecord->u.octet_aligned->size =
3653             res->records[i].recordData_len;
3654         record_cache_add(resultset, npr, pos, syntax, elementSetName);
3655     }
3656     if (res->num_diagnostics > 0)
3657     {
3658         const char *uri = res->diagnostics[0].uri;
3659         if (uri)
3660         {
3661             int code = 0;
3662             const char *cp;
3663             if ((cp = strrchr(uri, '/')))
3664                 code = atoi(cp+1);
3665             set_dset_error(c, code, uri,
3666                            res->diagnostics[0].details, 0);
3667         }
3668     }
3669     nmem = odr_extract_mem(c->odr_in);
3670     nmem_transfer(resultset->odr->mem, nmem);
3671     nmem_destroy(nmem);
3672 }
3673 #endif
3674
3675 #if YAZ_HAVE_XML2
3676 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
3677 {
3678     int ret = -1;
3679     const char *content_type = z_HTTP_header_lookup(hres->headers,
3680                                                     "Content-Type");
3681     const char *connection_head = z_HTTP_header_lookup(hres->headers,
3682                                                        "Connection");
3683     c->mask = 0;
3684     yaz_log(log_details, "%p handle_http", c);
3685
3686     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
3687     {
3688         Z_SOAP *soap_package = 0;
3689         ODR o = c->odr_in;
3690         Z_SOAP_Handler soap_handlers[2] = {
3691             {"http://www.loc.gov/zing/srw/", 0,
3692              (Z_SOAP_fun) yaz_srw_codec},
3693             {0, 0, 0}
3694         };
3695         ret = z_soap_codec(o, &soap_package,
3696                            &hres->content_buf, &hres->content_len,
3697                            soap_handlers);
3698         if (!ret && soap_package->which == Z_SOAP_generic &&
3699             soap_package->u.generic->no == 0)
3700         {
3701             Z_SRW_PDU *sr = (Z_SRW_PDU*) soap_package->u.generic->p;
3702             if (sr->which == Z_SRW_searchRetrieve_response)
3703                 handle_srw_response(c, sr->u.response);
3704             else
3705                 ret = -1;
3706         }
3707         else if (!ret && (soap_package->which == Z_SOAP_fault
3708                           || soap_package->which == Z_SOAP_error))
3709         {
3710             set_HTTP_error(c, hres->code,
3711                            soap_package->u.fault->fault_code,
3712                            soap_package->u.fault->fault_string);
3713         }
3714         else
3715             ret = -1;
3716     }
3717     if (ret)
3718     {
3719         if (hres->code != 200)
3720             set_HTTP_error(c, hres->code, 0, 0);
3721         else
3722             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3723         do_close(c);
3724     }
3725     ZOOM_connection_remove_task(c);
3726     if (!strcmp(hres->version, "1.0"))
3727     {
3728         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
3729         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
3730             do_close(c);
3731     }
3732     else
3733     {
3734         /* HTTP 1.1: only if no close we stay alive .. */
3735         if (connection_head && !strcmp(connection_head, "close"))
3736             do_close(c);
3737     }
3738 }
3739 #endif
3740
3741 static int do_read(ZOOM_connection c)
3742 {
3743     int r, more;
3744     ZOOM_Event event;
3745
3746     event = ZOOM_Event_create(ZOOM_EVENT_RECV_DATA);
3747     ZOOM_connection_put_event(c, event);
3748
3749     r = cs_get(c->cs, &c->buf_in, &c->len_in);
3750     more = cs_more(c->cs);
3751     yaz_log(log_details, "%p do_read len=%d more=%d", c, r, more);
3752     if (r == 1)
3753         return 0;
3754     if (r <= 0)
3755     {
3756         if (ZOOM_test_reconnect(c))
3757         {
3758             yaz_log(log_details, "%p do_read reconnect read", c);
3759         }
3760         else
3761         {
3762             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, c->host_port);
3763             do_close(c);
3764         }
3765     }
3766     else
3767     {
3768         Z_GDU *gdu;
3769         ZOOM_Event event;
3770
3771         odr_reset(c->odr_in);
3772         odr_setbuf(c->odr_in, c->buf_in, r, 0);
3773         event = ZOOM_Event_create(ZOOM_EVENT_RECV_APDU);
3774         ZOOM_connection_put_event(c, event);
3775
3776         if (!z_GDU(c->odr_in, &gdu, 0, 0))
3777         {
3778             int x;
3779             int err = odr_geterrorx(c->odr_in, &x);
3780             char msg[60];
3781             const char *element = odr_getelement(c->odr_in);
3782             sprintf(msg, "ODR code %d:%d element=%-20s",
3783                     err, x, element ? element : "<unknown>");
3784             set_ZOOM_error(c, ZOOM_ERROR_DECODE, msg);
3785             do_close(c);
3786         }
3787         else if (gdu->which == Z_GDU_Z3950)
3788             recv_apdu(c, gdu->u.z3950);
3789         else if (gdu->which == Z_GDU_HTTP_Response)
3790         {
3791 #if YAZ_HAVE_XML2
3792             handle_http(c, gdu->u.HTTP_Response);
3793 #else
3794             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3795             do_close(c);
3796 #endif
3797         }
3798         c->reconnect_ok = 0;
3799     }
3800     return 1;
3801 }
3802
3803 static zoom_ret do_write_ex(ZOOM_connection c, char *buf_out, int len_out)
3804 {
3805     int r;
3806     ZOOM_Event event;
3807
3808     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
3809     ZOOM_connection_put_event(c, event);
3810
3811     yaz_log(log_details, "%p do_write_ex len=%d", c, len_out);
3812     if ((r = cs_put(c->cs, buf_out, len_out)) < 0)
3813     {
3814         yaz_log(log_details, "%p do_write_ex write failed", c);
3815         if (ZOOM_test_reconnect(c))
3816         {
3817             return zoom_pending;
3818         }
3819         if (c->state == STATE_CONNECTING)
3820             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, c->host_port);
3821         else
3822             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, c->host_port);
3823         do_close(c);
3824         return zoom_complete;
3825     }
3826     else if (r == 1)
3827     {
3828         c->mask = ZOOM_SELECT_EXCEPT;
3829         if (c->cs->io_pending & CS_WANT_WRITE)
3830             c->mask += ZOOM_SELECT_WRITE;
3831         if (c->cs->io_pending & CS_WANT_READ)
3832             c->mask += ZOOM_SELECT_READ;
3833         yaz_log(log_details, "%p do_write_ex write incomplete mask=%d",
3834                 c, c->mask);
3835     }
3836     else
3837     {
3838         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
3839         yaz_log(log_details, "%p do_write_ex write complete mask=%d",
3840                 c, c->mask);
3841     }
3842     return zoom_pending;
3843 }
3844
3845 static zoom_ret do_write(ZOOM_connection c)
3846 {
3847     return do_write_ex(c, c->buf_out, c->len_out);
3848 }
3849
3850
3851 ZOOM_API(const char *)
3852     ZOOM_connection_option_get(ZOOM_connection c, const char *key)
3853 {
3854     return ZOOM_options_get(c->options, key);
3855 }
3856
3857 ZOOM_API(const char *)
3858     ZOOM_connection_option_getl(ZOOM_connection c, const char *key, int *lenp)
3859 {
3860     return ZOOM_options_getl(c->options, key, lenp);
3861 }
3862
3863 ZOOM_API(void)
3864     ZOOM_connection_option_set(ZOOM_connection c, const char *key,
3865                                const char *val)
3866 {
3867     ZOOM_options_set(c->options, key, val);
3868 }
3869
3870 ZOOM_API(void)
3871     ZOOM_connection_option_setl(ZOOM_connection c, const char *key,
3872                                 const char *val, int len)
3873 {
3874     ZOOM_options_setl(c->options, key, val, len);
3875 }
3876
3877 ZOOM_API(const char *)
3878     ZOOM_resultset_option_get(ZOOM_resultset r, const char *key)
3879 {
3880     return ZOOM_options_get(r->options, key);
3881 }
3882
3883 ZOOM_API(void)
3884     ZOOM_resultset_option_set(ZOOM_resultset r, const char *key,
3885                               const char *val)
3886 {
3887     ZOOM_options_set(r->options, key, val);
3888 }
3889
3890
3891 ZOOM_API(int)
3892     ZOOM_connection_errcode(ZOOM_connection c)
3893 {
3894     return ZOOM_connection_error(c, 0, 0);
3895 }
3896
3897 ZOOM_API(const char *)
3898     ZOOM_connection_errmsg(ZOOM_connection c)
3899 {
3900     const char *msg;
3901     ZOOM_connection_error(c, &msg, 0);
3902     return msg;
3903 }
3904
3905 ZOOM_API(const char *)
3906     ZOOM_connection_addinfo(ZOOM_connection c)
3907 {
3908     const char *addinfo;
3909     ZOOM_connection_error(c, 0, &addinfo);
3910     return addinfo;
3911 }
3912
3913 ZOOM_API(const char *)
3914     ZOOM_connection_diagset(ZOOM_connection c)
3915 {
3916     const char *diagset;
3917     ZOOM_connection_error_x(c, 0, 0, &diagset);
3918     return diagset;
3919 }
3920
3921 ZOOM_API(const char *)
3922     ZOOM_diag_str(int error)
3923 {
3924     switch (error)
3925     {
3926     case ZOOM_ERROR_NONE:
3927         return "No error";
3928     case ZOOM_ERROR_CONNECT:
3929         return "Connect failed";
3930     case ZOOM_ERROR_MEMORY:
3931         return "Out of memory";
3932     case ZOOM_ERROR_ENCODE:
3933         return "Encoding failed";
3934     case ZOOM_ERROR_DECODE:
3935         return "Decoding failed";
3936     case ZOOM_ERROR_CONNECTION_LOST:
3937         return "Connection lost";
3938     case ZOOM_ERROR_INIT:
3939         return "Init rejected";
3940     case ZOOM_ERROR_INTERNAL:
3941         return "Internal failure";
3942     case ZOOM_ERROR_TIMEOUT:
3943         return "Timeout";
3944     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
3945         return "Unsupported protocol";
3946     case ZOOM_ERROR_UNSUPPORTED_QUERY:
3947         return "Unsupported query type";
3948     case ZOOM_ERROR_INVALID_QUERY:
3949         return "Invalid query";
3950     case ZOOM_ERROR_CQL_PARSE:
3951         return "CQL parsing error";
3952     case ZOOM_ERROR_CQL_TRANSFORM:
3953         return "CQL transformation error";
3954     case ZOOM_ERROR_CCL_CONFIG:
3955         return "CCL configuration error";
3956     case ZOOM_ERROR_CCL_PARSE:
3957         return "CCL parsing error";
3958     default:
3959         return diagbib1_str(error);
3960     }
3961 }
3962
3963 ZOOM_API(int)
3964     ZOOM_connection_error_x(ZOOM_connection c, const char **cp,
3965                             const char **addinfo, const char **diagset)
3966 {
3967     int error = c->error;
3968     if (cp)
3969     {
3970         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
3971             *cp = ZOOM_diag_str(error);
3972         else if (!strcmp(c->diagset, "HTTP"))
3973             *cp = z_HTTP_errmsg(c->error);
3974         else if (!strcmp(c->diagset, "Bib-1"))
3975             *cp = ZOOM_diag_str(error);
3976         else if (!strcmp(c->diagset, "info:srw/diagnostic/1"))
3977             *cp = yaz_diag_srw_str(c->error);
3978         else
3979             *cp = "Unknown error and diagnostic set";
3980     }
3981     if (addinfo)
3982         *addinfo = c->addinfo ? c->addinfo : "";
3983     if (diagset)
3984         *diagset = c->diagset ? c->diagset : "";
3985     return c->error;
3986 }
3987
3988 ZOOM_API(int)
3989     ZOOM_connection_error(ZOOM_connection c, const char **cp,
3990                           const char **addinfo)
3991 {
3992     return ZOOM_connection_error_x(c, cp, addinfo, 0);
3993 }
3994
3995 static void ZOOM_connection_do_io(ZOOM_connection c, int mask)
3996 {
3997     ZOOM_Event event = 0;
3998     int r = cs_look(c->cs);
3999     yaz_log(log_details, "%p ZOOM_connection_do_io mask=%d cs_look=%d",
4000             c, mask, r);
4001
4002     if (r == CS_NONE)
4003     {
4004         event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
4005         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, c->host_port);
4006         do_close(c);
4007         ZOOM_connection_put_event(c, event);
4008     }
4009     else if (r == CS_CONNECT)
4010     {
4011         int ret = ret = cs_rcvconnect(c->cs);
4012         yaz_log(log_details, "%p ZOOM_connection_do_io "
4013                 "cs_rcvconnect returned %d", c, ret);
4014         if (ret == 1)
4015         {
4016             c->mask = ZOOM_SELECT_EXCEPT;
4017             if (c->cs->io_pending & CS_WANT_WRITE)
4018                 c->mask += ZOOM_SELECT_WRITE;
4019             if (c->cs->io_pending & CS_WANT_READ)
4020                 c->mask += ZOOM_SELECT_READ;
4021         }
4022         else if (ret == 0)
4023         {
4024             event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
4025             ZOOM_connection_put_event(c, event);
4026             get_cert(c);
4027             if (c->proto == PROTO_Z3950)
4028                 ZOOM_connection_send_init(c);
4029             else
4030             {
4031                 /* no init request for SRW .. */
4032                 assert(c->tasks->which == ZOOM_TASK_CONNECT);
4033                 ZOOM_connection_remove_task(c);
4034                 c->mask = 0;
4035                 ZOOM_connection_exec_task(c);
4036             }
4037             c->state = STATE_ESTABLISHED;
4038         }
4039         else
4040         {
4041             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, c->host_port);
4042             do_close(c);
4043         }
4044     }
4045     else
4046     {
4047         if (mask & ZOOM_SELECT_EXCEPT)
4048         {
4049             if (ZOOM_test_reconnect(c))
4050             {
4051                 event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
4052                 ZOOM_connection_put_event(c, event);
4053             }
4054             else
4055             {
4056                 set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, c->host_port);
4057                 do_close(c);
4058             }
4059             return;
4060         }
4061         if (mask & ZOOM_SELECT_READ)
4062             do_read(c);
4063         if (c->cs && (mask & ZOOM_SELECT_WRITE))
4064             do_write(c);
4065     }
4066 }
4067
4068 ZOOM_API(int)
4069     ZOOM_connection_last_event(ZOOM_connection cs)
4070 {
4071     if (!cs)
4072         return ZOOM_EVENT_NONE;
4073     return cs->last_event;
4074 }
4075
4076 ZOOM_API(int)
4077     ZOOM_event(int no, ZOOM_connection *cs)
4078 {
4079     int timeout = 30;      /* default timeout in seconds */
4080     int timeout_set = 0;   /* whether it was overriden at all */
4081 #if HAVE_SYS_POLL_H
4082     struct pollfd pollfds[1024];
4083     ZOOM_connection poll_cs[1024];
4084 #else
4085     struct timeval tv;
4086     fd_set input, output, except;
4087 #endif
4088     int i, r, nfds;
4089     int max_fd = 0;
4090
4091     yaz_log(log_details, "ZOOM_event(no=%d,cs=%p)", no, cs);
4092
4093     for (i = 0; i<no; i++)
4094     {
4095         ZOOM_connection c = cs[i];
4096         ZOOM_Event event;
4097
4098 #if 0
4099         if (c)
4100             ZOOM_connection_show_tasks(c);
4101 #endif
4102
4103         if (c && (event = ZOOM_connection_get_event(c)))
4104         {
4105             ZOOM_Event_destroy(event);
4106             return i+1;
4107         }
4108     }
4109     for (i = 0; i<no; i++)
4110     {
4111         ZOOM_connection c = cs[i];
4112         if (c)
4113         {
4114             ZOOM_Event event;
4115             ZOOM_connection_exec_task(c);
4116             if ((event = ZOOM_connection_get_event(c)))
4117             {
4118                 ZOOM_Event_destroy(event);
4119                 return i+1;
4120             }
4121         }
4122     }
4123 #if HAVE_SYS_POLL_H
4124
4125 #else
4126     FD_ZERO(&input);
4127     FD_ZERO(&output);
4128     FD_ZERO(&except);
4129 #endif
4130     nfds = 0;
4131     for (i = 0; i<no; i++)
4132     {
4133         ZOOM_connection c = cs[i];
4134         int fd, mask;
4135         int this_timeout;
4136
4137         if (!c)
4138             continue;
4139         fd = z3950_connection_socket(c);
4140         mask = z3950_connection_mask(c);
4141
4142         if (fd == -1)
4143             continue;
4144         if (max_fd < fd)
4145             max_fd = fd;
4146
4147         /* -1 is used for indefinite timeout (no timeout), so -2 here. */
4148         this_timeout = ZOOM_options_get_int(c->options, "timeout", -2);
4149         if (this_timeout != -2)
4150         {
4151             /* ensure the minimum timeout is used */
4152             if (!timeout_set)
4153                 timeout = this_timeout;
4154             else if (this_timeout != -1 && this_timeout < timeout)
4155                 timeout = this_timeout;
4156             timeout_set = 1;
4157         }
4158 #if HAVE_SYS_POLL_H
4159         if (mask)
4160         {
4161             short poll_events = 0;
4162
4163             if (mask & ZOOM_SELECT_READ)
4164                 poll_events += POLLIN;
4165             if (mask & ZOOM_SELECT_WRITE)
4166                 poll_events += POLLOUT;
4167             if (mask & ZOOM_SELECT_EXCEPT)
4168                 poll_events += POLLERR;
4169             pollfds[nfds].fd = fd;
4170             pollfds[nfds].events = poll_events;
4171             pollfds[nfds].revents = 0;
4172             poll_cs[nfds] = c;
4173             nfds++;
4174         }
4175 #else
4176         if (mask & ZOOM_SELECT_READ)
4177         {
4178             FD_SET(fd, &input);
4179             nfds++;
4180         }
4181         if (mask & ZOOM_SELECT_WRITE)
4182         {
4183             FD_SET(fd, &output);
4184             nfds++;
4185         }
4186         if (mask & ZOOM_SELECT_EXCEPT)
4187         {
4188             FD_SET(fd, &except);
4189             nfds++;
4190         }
4191 #endif
4192     }
4193     if (!nfds)
4194         return 0;
4195
4196 #if HAVE_SYS_POLL_H
4197     while ((r = poll(pollfds, nfds,
4198          (timeout == -1 ? -1 : timeout * 1000))) < 0
4199           && errno == EINTR)
4200     {
4201         ;
4202     }
4203     if (r < 0)
4204         yaz_log(YLOG_WARN|YLOG_ERRNO, "ZOOM_event: poll");
4205     for (i = 0; i<nfds; i++)
4206     {
4207         ZOOM_connection c = poll_cs[i];
4208         if (r && c->mask)
4209         {
4210             int mask = 0;
4211             if (pollfds[i].revents & POLLIN)
4212                 mask += ZOOM_SELECT_READ;
4213             if (pollfds[i].revents & POLLOUT)
4214                 mask += ZOOM_SELECT_WRITE;
4215             if (pollfds[i].revents & POLLERR)
4216                 mask += ZOOM_SELECT_EXCEPT;
4217             if (mask)
4218                 ZOOM_connection_do_io(c, mask);
4219         }
4220         else if (r == 0 && c->mask)
4221         {
4222             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
4223             /* timeout and this connection was waiting */
4224             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
4225             do_close(c);
4226             ZOOM_connection_put_event(c, event);
4227         }
4228     }
4229 #else
4230     tv.tv_sec = timeout;
4231     tv.tv_usec = 0;
4232
4233     while ((r = select(max_fd+1, &input, &output, &except,
4234                        (timeout == -1 ? 0 : &tv))) < 0 && errno == EINTR)
4235     {
4236         ;
4237     }
4238     if (r < 0)
4239         yaz_log(YLOG_WARN|YLOG_ERRNO, "ZOOM_event: select");
4240
4241     r = select(max_fd+1, &input, &output, &except, (timeout == -1 ? 0 : &tv));
4242     for (i = 0; i<no; i++)
4243     {
4244         ZOOM_connection c = cs[i];
4245         int fd, mask;
4246
4247         if (!c)
4248             continue;
4249         fd = z3950_connection_socket(c);
4250         mask = 0;
4251         if (r && c->mask)
4252         {
4253             /* no timeout and real socket */
4254             if (FD_ISSET(fd, &input))
4255                 mask += ZOOM_SELECT_READ;
4256             if (FD_ISSET(fd, &output))
4257                 mask += ZOOM_SELECT_WRITE;
4258             if (FD_ISSET(fd, &except))
4259                 mask += ZOOM_SELECT_EXCEPT;
4260             if (mask)
4261                 ZOOM_connection_do_io(c, mask);
4262         }
4263         if (r == 0 && c->mask)
4264         {
4265             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
4266             /* timeout and this connection was waiting */
4267             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
4268             do_close(c);
4269             ZOOM_connection_put_event(c, event);
4270         }
4271     }
4272 #endif
4273     for (i = 0; i<no; i++)
4274     {
4275         ZOOM_connection c = cs[i];
4276         ZOOM_Event event;
4277         if (c && (event = ZOOM_connection_get_event(c)))
4278         {
4279             ZOOM_Event_destroy(event);
4280             return i+1;
4281         }
4282     }
4283     return 0;
4284 }
4285
4286
4287 /*
4288  * Returns an xmalloc()d string containing RPN that corresponds to the
4289  * CQL passed in.  On error, sets the Connection object's error state
4290  * and returns a null pointer.
4291  * ### We could cache CQL parser and/or transformer in Connection.
4292  */
4293 static char *cql2pqf(ZOOM_connection c, const char *cql)
4294 {
4295     CQL_parser parser;
4296     int error;
4297     struct cql_node *node;
4298     const char *cqlfile;
4299     static cql_transform_t trans;
4300     char pqfbuf[512];
4301
4302     parser = cql_parser_create();
4303     if ((error = cql_parser_string(parser, cql)) != 0) {
4304         cql_parser_destroy(parser);
4305         set_ZOOM_error(c, ZOOM_ERROR_CQL_PARSE, cql);
4306         return 0;
4307     }
4308
4309     node = cql_parser_result(parser);
4310     /* ### Do not call cql_parser_destroy() yet: it destroys `node'! */
4311
4312     cqlfile = ZOOM_connection_option_get(c, "cqlfile");
4313     if (cqlfile == 0) {
4314         cql_parser_destroy(parser);
4315         cql_node_destroy(node);
4316         set_ZOOM_error(c, ZOOM_ERROR_CQL_TRANSFORM, "no CQL transform file");
4317         return 0;
4318     }
4319
4320     if ((trans = cql_transform_open_fname(cqlfile)) == 0) {
4321         char buf[512];
4322         cql_parser_destroy(parser);
4323         cql_node_destroy(node);
4324         sprintf(buf, "can't open CQL transform file '%.200s': %.200s",
4325                 cqlfile, strerror(errno));
4326         set_ZOOM_error(c, ZOOM_ERROR_CQL_TRANSFORM, buf);
4327         return 0;
4328     }
4329
4330     error = cql_transform_buf(trans, node, pqfbuf, sizeof pqfbuf);
4331     cql_parser_destroy(parser);
4332     cql_node_destroy(node);
4333     if (error != 0) {
4334         char buf[512];
4335         const char *addinfo;
4336         error = cql_transform_error(trans, &addinfo);
4337         cql_transform_close(trans);
4338         sprintf(buf, "%.200s (addinfo=%.200s)", cql_strerror(error), addinfo);
4339         set_ZOOM_error(c, ZOOM_ERROR_CQL_TRANSFORM, buf);
4340         return 0;
4341     }
4342
4343     cql_transform_close(trans);
4344     return xstrdup(pqfbuf);
4345 }
4346
4347 /*
4348  * Local variables:
4349  * c-basic-offset: 4
4350  * indent-tabs-mode: nil
4351  * End:
4352  * vim: shiftwidth=4 tabstop=8 expandtab
4353  */
4354