src/yaz-proxy.cpp

   1 /* $Id: yaz-proxy.cpp,v 1.59 2006-04-16 07:35:06 adam Exp $
   2    Copyright (c) 1998-2006, Index Data.
   3
   4 This file is part of the yazproxy.
   5
   6 YAZ proxy is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 YAZ proxy is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with YAZ proxy; see the file LICENSE.  If not, write to the
  18 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.
  20  */
  21
  22 #ifdef WIN32
  23 #define HAVE_SYS_STAT_H 1
  24 #define HAVE_SYS_TYPES_H 1
  25 #endif
  26
  27 #if HAVE_UNISTD_H
  28 #include <unistd.h>
  29 #endif
  30 #if HAVE_SYS_TIME_H
  31 #include <sys/time.h>
  32 #endif
  33 #if HAVE_SYS_TYPES_H
  34 #include <sys/types.h>
  35 #endif
  36 #if HAVE_SYS_STAT_H
  37 #include <sys/stat.h>
  38 #endif
  39
  40 #include <assert.h>
  41 #include <stdlib.h>
  42 #include <time.h>
  43 #include <fcntl.h>
  44
  45 #include <yaz/srw.h>
  46 #include <yaz/marcdisp.h>
  47 #include <yaz/yaz-iconv.h>
  48 #include <yaz/log.h>
  49 #include <yaz/diagbib1.h>
  50 #include "proxyp.h"
  51 #include <yaz/pquery.h>
  52 #include <yaz/otherinfo.h>
  53 #include <yaz/charneg.h>
  54 #include "msg-thread.h"
  55
  56 using namespace yazpp_1;
  57
  58 #ifdef WIN32
  59 #define strncasecmp _strnicmp
  60 #endif
  61
  62 #define USE_AUTH_MSG 1
  63
  64 #if USE_AUTH_MSG
  65 class YAZ_EXPORT Auth_Msg : public IMsg_Thread {
  66 public:
  67     int m_ret;
  68     IMsg_Thread *handle();
  69     void result();
  70     Yaz_Proxy *m_proxy;
  71     NMEM m_nmem;
  72     char *m_apdu_buf;
  73     int m_apdu_len;
  74     Auth_Msg();
  75     virtual ~Auth_Msg();
  76 };
  77
  78 Auth_Msg::Auth_Msg()
  79 {
  80     m_nmem = nmem_create();
  81 }
  82
  83 Auth_Msg::~Auth_Msg()
  84 {
  85     nmem_destroy(m_nmem);
  86 }
  87
  88 IMsg_Thread *Auth_Msg::handle()
  89 {
  90     ODR decode = odr_createmem(ODR_DECODE);
  91     Z_APDU *apdu;
  92
  93     odr_setbuf(decode, m_apdu_buf, m_apdu_len, 0);
  94     int r = z_APDU(decode, &apdu, 0, 0);
  95     if (!r)
  96     {
  97         yaz_log(YLOG_WARN, "decode failed in Auth_Msg::handle");
  98     }
  99     else
 100     {
 101         m_ret = m_proxy->handle_authentication(apdu);
 102     }
 103     odr_destroy(decode);
 104     return this;
 105 }
 106
 107 void Auth_Msg::result()
 108 {
 109     if (m_proxy->dec_ref(false))
 110     {
 111         yaz_log(YLOG_LOG, "Auth_Msg::proxy deleted meanwhile");
 112     }
 113     else
 114     {
 115         odr_setbuf(m_proxy->odr_decode(), m_apdu_buf, m_apdu_len, 0);
 116         Z_APDU *apdu = 0;
 117         int r = z_APDU(m_proxy->odr_decode(), &apdu, 0, 0);
 118         if (!r)
 119             yaz_log(YLOG_LOG, "Auth_Msg::result z_APDU failed");
 120         m_proxy->result_authentication(apdu, m_ret);
 121     }
 122     delete this;
 123 }
 124
 125 #endif
 126
 127 void Yaz_Proxy::result_authentication(Z_APDU *apdu, int ret)
 128 {
 129     if (apdu == 0 || ret == 0)
 130     {
 131         Z_APDU *apdu_reject = zget_APDU(odr_encode(), Z_APDU_initResponse);
 132         *apdu_reject->u.initResponse->result = 0;
 133         send_to_client(apdu_reject);
 134         dec_ref(false);
 135     }
 136     else
 137     {
 138         if (apdu->which == Z_APDU_initRequest)
 139         {
 140             Yaz_ProxyConfig *cfg = check_reconfigure();
 141             if (cfg)
 142                 cfg->target_authentication(m_default_target, odr_encode(),
 143                                            apdu->u.initRequest);
 144         }
 145         handle_incoming_Z_PDU_2(apdu);
 146     }
 147 }
 148
 149 static const char *apdu_name(Z_APDU *apdu)
 150 {
 151     switch (apdu->which)
 152     {
 153     case Z_APDU_initRequest:
 154         return "initRequest";
 155     case Z_APDU_initResponse:
 156         return "initResponse";
 157     case Z_APDU_searchRequest:
 158         return "searchRequest";
 159     case Z_APDU_searchResponse:
 160         return "searchResponse";
 161     case Z_APDU_presentRequest:
 162         return "presentRequest";
 163     case Z_APDU_presentResponse:
 164         return "presentResponse";
 165     case Z_APDU_deleteResultSetRequest:
 166         return "deleteResultSetRequest";
 167     case Z_APDU_deleteResultSetResponse:
 168         return "deleteResultSetResponse";
 169     case Z_APDU_scanRequest:
 170         return "scanRequest";
 171     case Z_APDU_scanResponse:
 172         return "scanResponse";
 173     case Z_APDU_sortRequest:
 174         return "sortRequest";
 175     case Z_APDU_sortResponse:
 176         return "sortResponse";
 177     case Z_APDU_extendedServicesRequest:
 178         return "extendedServicesRequest";
 179     case Z_APDU_extendedServicesResponse:
 180         return "extendedServicesResponse";
 181     case Z_APDU_close:
 182         return "close";
 183     }
 184     return "other";
 185 }
 186
 187 static const char *gdu_name(Z_GDU *gdu)
 188 {
 189     switch(gdu->which)
 190     {
 191     case Z_GDU_Z3950:
 192         return apdu_name(gdu->u.z3950);
 193     case Z_GDU_HTTP_Request:
 194         return "HTTP Request";
 195     case Z_GDU_HTTP_Response:
 196         return "HTTP Response";
 197     }
 198     return "Unknown request/response";
 199 }
 200
 201 Yaz_Proxy::Yaz_Proxy(IPDU_Observable *the_PDU_Observable,
 202                      ISocketObservable *the_socket_observable,
 203                      Yaz_Proxy *parent)
 204     :
 205     Z_Assoc(the_PDU_Observable),
 206     m_bw_stat(60), m_pdu_stat(60), m_search_stat(60)
 207 {
 208     m_PDU_Observable = the_PDU_Observable;
 209     m_socket_observable = the_socket_observable;
 210     m_client = 0;
 211     m_parent = parent;
 212     m_clientPool = 0;
 213     m_seqno = 1;
 214     m_keepalive_limit_bw = 500000;
 215     m_keepalive_limit_pdu = 1000;
 216     m_proxyTarget = 0;
 217     m_default_target = 0;
 218     m_proxy_negotiation_charset = 0;
 219     m_proxy_negotiation_lang = 0;
 220     m_proxy_negotiation_default_charset = 0;
 221     m_charset_converter = new Yaz_CharsetConverter;
 222     m_max_clients = 150;
 223     m_log_mask = 0;
 224     m_seed = time(0);
 225     m_client_idletime = 600;
 226     m_target_idletime = 600;
 227     m_optimize = xstrdup ("1");
 228     strcpy(m_session_str, "0 ");
 229     m_session_no = 0;
 230     m_bytes_sent = 0;
 231     m_bytes_recv = 0;
 232     m_bw_max = 0;
 233     m_pdu_max = 0;
 234     m_search_max = 0;
 235     m_max_connect = 0;
 236     m_max_connect_period = 0;
 237     m_limit_connect = 0;
 238     m_limit_connect_period = 0;
 239     m_timeout_mode = timeout_normal;
 240     m_timeout_gdu = 0;
 241     m_max_record_retrieve = 0;
 242     m_reconfig_flag = 0;
 243     m_config_fname = 0;
 244     m_request_no = 0;
 245     m_flag_invalid_session = 0;
 246     m_referenceId = 0;
 247     m_referenceId_mem = nmem_create();
 248     m_config = 0;
 249     m_marcxml_mode = none;
 250     m_stylesheet_xsp = 0;
 251     m_stylesheet_nprl = 0;
 252     m_stylesheet_apdu = 0;
 253     m_s2z_stylesheet = 0;
 254     m_s2z_database = 0;
 255     m_schema = 0;
 256     m_backend_type = 0;
 257     m_backend_charset = 0;
 258     m_frontend_type = 0;
 259     m_initRequest_apdu = 0;
 260     m_initRequest_mem = 0;
 261     m_initRequest_preferredMessageSize = 0;
 262     m_initRequest_maximumRecordSize = 0;
 263     m_initRequest_options = 0;
 264     m_initRequest_version = 0;
 265     m_initRequest_oi_negotiation_charsets = 0;
 266     m_initRequest_oi_negotiation_num_charsets = 0;
 267     m_initRequest_oi_negotiation_langs = 0;
 268     m_initRequest_oi_negotiation_num_langs = 0;
 269     m_initRequest_oi_negotiation_selected = 0;
 270     m_apdu_invalid_session = 0;
 271     m_mem_invalid_session = 0;
 272     m_s2z_odr_init = 0;
 273     m_s2z_odr_search = 0;
 274     m_s2z_init_apdu = 0;
 275     m_s2z_search_apdu = 0;
 276     m_s2z_present_apdu = 0;
 277     m_http_keepalive = 0;
 278     m_http_version = 0;
 279     m_soap_ns = 0;
 280     m_s2z_packing = Z_SRW_recordPacking_string;
 281 #if HAVE_GETTIMEOFDAY
 282     m_time_tv = xmalloc(sizeof(struct timeval));
 283     struct timeval *tv = (struct timeval *) m_time_tv;
 284     tv->tv_sec = 0;
 285     tv->tv_usec = 0;
 286 #else
 287     m_time_tv = 0;
 288 #endif
 289     m_usemarcon_ini_stage1 = 0;
 290     m_usemarcon_ini_stage2 = 0;
 291     m_usemarcon = new Yaz_usemarcon();
 292     if (!m_parent)
 293         low_socket_open();
 294     m_my_thread = 0;
 295     m_ref_count = 1;
 296     m_main_ptr_dec = false;
 297     m_peername = 0;
 298 }
 299
 300 void Yaz_Proxy::inc_ref()
 301 {
 302     m_ref_count++;
 303 }
 304
 305 Yaz_Proxy::~Yaz_Proxy()
 306 {
 307     yaz_log(YLOG_LOG, "%sClosed %d/%d sent/recv bytes total", m_session_str,
 308             m_bytes_sent, m_bytes_recv);
 309     nmem_destroy(m_initRequest_mem);
 310     nmem_destroy(m_mem_invalid_session);
 311     nmem_destroy(m_referenceId_mem);
 312
 313     xfree(m_proxyTarget);
 314     xfree(m_default_target);
 315     xfree(m_proxy_negotiation_charset);
 316     xfree(m_proxy_negotiation_lang);
 317     xfree(m_proxy_negotiation_default_charset);
 318     delete m_charset_converter;
 319     xfree(m_optimize);
 320
 321 #if HAVE_XSLT
 322     if (m_stylesheet_xsp)
 323         xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
 324 #endif
 325     xfree (m_time_tv);
 326
 327     xfree (m_peername);
 328     xfree (m_schema);
 329     xfree (m_backend_type);
 330     xfree (m_backend_charset);
 331     xfree (m_usemarcon_ini_stage1);
 332     xfree (m_usemarcon_ini_stage2);
 333     delete m_usemarcon;
 334     if (m_s2z_odr_init)
 335         odr_destroy(m_s2z_odr_init);
 336     if (m_s2z_odr_search)
 337         odr_destroy(m_s2z_odr_search);
 338     if (!m_parent)
 339         low_socket_close();
 340     if (!m_parent)
 341         delete m_my_thread;
 342     delete m_config;
 343 }
 344
 345 void Yaz_Proxy::set_debug_mode(int mode)
 346 {
 347     m_debug_mode = mode;
 348 }
 349
 350 int Yaz_Proxy::set_config(const char *config)
 351 {
 352     delete m_config;
 353     m_config = new Yaz_ProxyConfig();
 354     xfree(m_config_fname);
 355     m_config_fname = xstrdup(config);
 356     int r = m_config->read_xml(config);
 357     if (!r)
 358     {
 359         int period = 60;
 360         m_config->get_generic_info(&m_log_mask, &m_max_clients,
 361                                    &m_max_connect, &m_limit_connect, &period);
 362         m_connect.set_period(period);
 363     }
 364     return r;
 365 }
 366
 367 void Yaz_Proxy::set_default_target(const char *target)
 368 {
 369     xfree (m_default_target);
 370     m_default_target = 0;
 371     if (target)
 372         m_default_target = (char *) xstrdup (target);
 373 }
 374
 375 void Yaz_Proxy::set_proxy_negotiation (const char *charset, const char *lang,
 376                                        const char *default_charset)
 377 {
 378     yaz_log(YLOG_DEBUG, "%sSet the proxy negotiation: charset to '%s', "
 379         "default charset to '%s', language to '%s'", m_session_str,
 380         charset?charset:"none",
 381         default_charset?default_charset:"none",
 382         lang?lang:"none");
 383     xfree (m_proxy_negotiation_charset);
 384     xfree (m_proxy_negotiation_lang);
 385     m_proxy_negotiation_charset = m_proxy_negotiation_lang = 0;
 386     if (charset)
 387         m_proxy_negotiation_charset = (char *) xstrdup (charset);
 388     if (lang)
 389         m_proxy_negotiation_lang = (char *) xstrdup (lang);
 390     if (default_charset)
 391         m_proxy_negotiation_default_charset =
 392             (char *) xstrdup (default_charset);
 393 }
 394
 395 Yaz_ProxyConfig *Yaz_Proxy::check_reconfigure()
 396 {
 397     if (m_parent)
 398         return m_parent->check_reconfigure();
 399
 400     Yaz_ProxyConfig *cfg = m_config;
 401     if (m_reconfig_flag)
 402     {
 403         yaz_log(YLOG_LOG, "reconfigure");
 404         yaz_log_reopen();
 405         if (m_config_fname && cfg)
 406         {
 407             yaz_log(YLOG_LOG, "reconfigure config %s", m_config_fname);
 408             int r = cfg->read_xml(m_config_fname);
 409             if (r)
 410                 yaz_log(YLOG_WARN, "reconfigure failed");
 411             else
 412             {
 413                 m_log_mask = 0;
 414                 int period = 60;
 415                 cfg->get_generic_info(&m_log_mask, &m_max_clients,
 416                                       &m_max_connect, &m_limit_connect,
 417                                       &period);
 418                 m_connect.set_period(period);
 419             }
 420         }
 421         else
 422             yaz_log(YLOG_LOG, "reconfigure");
 423         m_reconfig_flag = 0;
 424     }
 425     return cfg;
 426 }
 427
 428 IPDU_Observer *Yaz_Proxy::sessionNotify(IPDU_Observable
 429                                         *the_PDU_Observable, int fd)
 430 {
 431     check_reconfigure();
 432
 433     char session_str[200];
 434     const char *peername = the_PDU_Observable->getpeername();
 435     if (m_log_mask & PROXY_LOG_IP_CLIENT)
 436         sprintf(session_str, "%ld:%d %.80s %d ",
 437                 (long) time(0), m_session_no, peername, 0);
 438     else
 439         sprintf(session_str, "%ld:%d %d ",
 440                 (long) time(0), m_session_no, 0);
 441     m_session_no++;
 442
 443     yaz_log (YLOG_LOG, "%sNew session %s", session_str, peername);
 444
 445     Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable,
 446                                          m_socket_observable, this);
 447
 448     new_proxy->m_config = 0;
 449     new_proxy->m_config_fname = 0;
 450     new_proxy->timeout(m_client_idletime);
 451     new_proxy->m_target_idletime = m_target_idletime;
 452     new_proxy->set_default_target(m_default_target);
 453     new_proxy->m_max_clients = m_max_clients;
 454     new_proxy->m_log_mask = m_log_mask;
 455
 456     if (!strcmp(peername, "tcp:163.121.19.82")) // NIS GROUP
 457         new_proxy->m_log_mask = 255;
 458
 459     new_proxy->set_APDU_log(get_APDU_log());
 460     if (new_proxy->m_log_mask & PROXY_LOG_APDU_CLIENT)
 461         new_proxy->set_APDU_yazlog(1);
 462     else
 463         new_proxy->set_APDU_yazlog(0);
 464     strcpy(new_proxy->m_session_str, session_str);
 465     new_proxy->m_peername = xstrdup(peername);
 466     new_proxy->set_proxy_negotiation(m_proxy_negotiation_charset,
 467         m_proxy_negotiation_lang, m_proxy_negotiation_default_charset);
 468     // create thread object the first time we get an incoming connection
 469     if (!m_my_thread)
 470         m_my_thread = new Msg_Thread(m_socket_observable, 1);
 471     new_proxy->m_my_thread = m_my_thread;
 472     return new_proxy;
 473 }
 474
 475 char *Yaz_Proxy::get_cookie(Z_OtherInformation **otherInfo)
 476 {
 477     int oid[OID_SIZE];
 478     Z_OtherInformationUnit *oi;
 479     struct oident ent;
 480     ent.proto = PROTO_Z3950;
 481     ent.oclass = CLASS_USERINFO;
 482     ent.value = (oid_value) VAL_COOKIE;
 483     assert (oid_ent_to_oid (&ent, oid));
 484
 485     if (oid_ent_to_oid (&ent, oid) &&
 486         (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
 487         oi->which == Z_OtherInfo_characterInfo)
 488         return oi->information.characterInfo;
 489     return 0;
 490 }
 491 char *Yaz_Proxy::get_proxy(Z_OtherInformation **otherInfo)
 492 {
 493     int oid[OID_SIZE];
 494     Z_OtherInformationUnit *oi;
 495     struct oident ent;
 496     ent.proto = PROTO_Z3950;
 497     ent.oclass = CLASS_USERINFO;
 498     ent.value = (oid_value) VAL_PROXY;
 499     if (oid_ent_to_oid (&ent, oid) &&
 500         (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
 501         oi->which == Z_OtherInfo_characterInfo)
 502         return oi->information.characterInfo;
 503     return 0;
 504 }
 505 const char *Yaz_Proxy::load_balance(const char **url)
 506 {
 507     int zurl_in_use[MAX_ZURL_PLEX];
 508     int zurl_in_spare[MAX_ZURL_PLEX];
 509     Yaz_ProxyClient *c;
 510     int i;
 511
 512     for (i = 0; i<MAX_ZURL_PLEX; i++)
 513     {
 514         zurl_in_use[i] = 0;
 515         zurl_in_spare[i] = 0;
 516     }
 517     for (c = m_parent->m_clientPool; c; c = c->m_next)
 518     {
 519         for (i = 0; url[i]; i++)
 520             if (!strcmp(url[i], c->get_hostname()))
 521             {
 522                 zurl_in_use[i]++;
 523                 if (c->m_cookie == 0 && c->m_server == 0 && c->m_waiting == 0)
 524                     zurl_in_spare[i]++;
 525             }
 526     }
 527     int min_use = 100000;
 528     int spare_for_min = 0;
 529     int max_spare = 0;
 530     const char *ret_min = 0;
 531     const char *ret_spare = 0;
 532     for (i = 0; url[i]; i++)
 533     {
 534         yaz_log(YLOG_DEBUG, "%szurl=%s use=%d spare=%d",
 535                 m_session_str, url[i], zurl_in_use[i], zurl_in_spare[i]);
 536         if (min_use > zurl_in_use[i])
 537         {
 538             ret_min = url[i];
 539             min_use = zurl_in_use[i];
 540             spare_for_min = zurl_in_spare[i];
 541         }
 542         if (max_spare < zurl_in_spare[i])
 543         {
 544             ret_spare = url[i];
 545             max_spare = zurl_in_spare[i];
 546         }
 547     }
 548     return ret_min;
 549 }
 550
 551 Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
 552                                        const char *proxy_host)
 553 {
 554     assert (m_parent);
 555     Yaz_Proxy *parent = m_parent;
 556     Yaz_ProxyClient *c = m_client;
 557
 558     if (!m_proxyTarget)
 559     {
 560         const char *url[MAX_ZURL_PLEX];
 561         Yaz_ProxyConfig *cfg = check_reconfigure();
 562         if (proxy_host)
 563         {
 564             if (parent && parent->m_debug_mode)
 565             {
 566                 // only to be enabled for debugging...
 567                 if (!strcmp(proxy_host, "stop"))
 568                     exit(0);
 569             }
 570             xfree(m_default_target);
 571             m_default_target = xstrdup(proxy_host);
 572         }
 573         proxy_host = m_default_target;
 574         int client_idletime = -1;
 575         const char *cql2rpn_fname = 0;
 576         const char *negotiation_charset = 0;
 577         const char *negotiation_lang = 0;
 578         const char *query_charset = 0;
 579         const char *default_client_query_charset = 0;
 580         url[0] = m_default_target;
 581         url[1] = 0;
 582         if (cfg)
 583         {
 584             int pre_init = 0;
 585             cfg->get_target_info(proxy_host, url, &m_bw_max,
 586                                  &m_pdu_max, &m_max_record_retrieve,
 587                                  &m_search_max,
 588                                  &m_target_idletime, &client_idletime,
 589                                  &parent->m_max_clients,
 590                                  &m_keepalive_limit_bw,
 591                                  &m_keepalive_limit_pdu,
 592                                  &pre_init,
 593                                  &cql2rpn_fname,
 594                                  &negotiation_charset,
 595                                  &negotiation_lang,
 596                                  &query_charset,
 597                                  &default_client_query_charset);
 598         }
 599         if (client_idletime != -1)
 600         {
 601             m_client_idletime = client_idletime;
 602             timeout(m_client_idletime);
 603         }
 604         if (cql2rpn_fname)
 605             m_cql2rpn.set_pqf_file(cql2rpn_fname);
 606         if (negotiation_charset || negotiation_lang || default_client_query_charset)
 607         {
 608             set_proxy_negotiation(negotiation_charset,
 609                 negotiation_lang, default_client_query_charset);
 610         }
 611         m_charset_converter->set_target_query_charset(query_charset);
 612         if (!url[0])
 613         {
 614             yaz_log(YLOG_LOG, "%sNo default target", m_session_str);
 615             return 0;
 616         }
 617         // we don't handle multiplexing for cookie session, so we just
 618         // pick the first one in this case (anonymous users will be able
 619         // to use any backend)
 620         if (cookie && *cookie)
 621             m_proxyTarget = (char*) xstrdup(url[0]);
 622         else
 623             m_proxyTarget = (char*) xstrdup(load_balance(url));
 624     }
 625     if (cookie && *cookie)
 626     {   // search in sessions with a cookie
 627         for (c = parent->m_clientPool; c; c = c->m_next)
 628         {
 629             assert (c->m_prev);
 630             assert (*c->m_prev == c);
 631             if (c->m_cookie && !strcmp(cookie,c->m_cookie) &&
 632                 !strcmp(m_proxyTarget, c->get_hostname()))
 633             {
 634                 // Found it in cache
 635                 // The following handles "cancel"
 636                 // If connection is busy (waiting for PDU) and
 637                 // we have an initRequest we can safely do re-open
 638                 if (c->m_waiting && apdu->which == Z_APDU_initRequest)
 639                 {
 640                     yaz_log (YLOG_LOG, "%s REOPEN target=%s", m_session_str,
 641                              c->get_hostname());
 642                     c->close();
 643                     c->m_init_flag = 0;
 644
 645                     c->m_last_ok = 0;
 646                     c->m_cache.clear();
 647                     c->m_last_resultCount = 0;
 648                     c->m_sr_transform = 0;
 649                     c->m_waiting = 0;
 650                     c->m_resultSetStartPoint = 0;
 651                     c->m_target_idletime = m_target_idletime;
 652                     if (c->client(m_proxyTarget))
 653                     {
 654                         delete c;
 655                         return 0;
 656                     }
 657                     c->timeout(30);
 658                 }
 659                 c->m_seqno = parent->m_seqno;
 660                 if (c->m_server && c->m_server != this)
 661                     c->m_server->m_client = 0;
 662                 c->m_server = this;
 663                 (parent->m_seqno)++;
 664                 yaz_log (YLOG_DEBUG, "get_client 1 %p %p", this, c);
 665                 return c;
 666             }
 667         }
 668     }
 669     else if (!c && apdu->which == Z_APDU_initRequest )
 670     {
 671         // anonymous sessions without cookie.
 672         // if authentication is set it is NOT anonymous se we can't share them.
 673         // If charset and lang negotiation is use it is NOT anonymous session too.
 674         for (c = parent->m_clientPool; c; c = c->m_next)
 675         {
 676             assert(c->m_prev);
 677             assert(*c->m_prev == c);
 678             if (c->m_server == 0 && c->m_cookie == 0 &&  c->m_waiting == 0
 679                 && c->compare_idAuthentication(apdu)
 680                 && c->compare_charset(apdu)
 681                 && !strcmp(m_proxyTarget, c->get_hostname()))
 682             {
 683                 // found it in cache
 684                 yaz_log (YLOG_LOG, "%sREUSE %d %s",
 685                          m_session_str, parent->m_seqno, c->get_hostname());
 686
 687                 c->m_seqno = parent->m_seqno;
 688                 assert(c->m_server == 0);
 689                 c->m_server = this;
 690
 691                 if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 692                     c->set_APDU_yazlog(1);
 693                 else
 694                     c->set_APDU_yazlog(0);
 695
 696                 (parent->m_seqno)++;
 697
 698                 parent->pre_init();
 699
 700                 return c;
 701             }
 702         }
 703     }
 704     if (!m_client)
 705     {
 706         if (apdu->which != Z_APDU_initRequest)
 707         {
 708             yaz_log (YLOG_LOG, "%sno init request as first PDU", m_session_str);
 709             return 0;
 710         }
 711         // go through list of clients - and find the lowest/oldest one.
 712         Yaz_ProxyClient *c_min = 0;
 713         int min_seq = -1;
 714         int no_of_clients = 0;
 715         if (parent->m_clientPool)
 716             yaz_log (YLOG_DEBUG, "Existing sessions");
 717         for (c = parent->m_clientPool; c; c = c->m_next)
 718         {
 719             yaz_log (YLOG_DEBUG, " Session %-3d wait=%d %s cookie=%s", c->m_seqno,
 720                                c->m_waiting, c->get_hostname(),
 721                                c->m_cookie ? c->m_cookie : "");
 722             no_of_clients++;
 723             if (min_seq < 0 || c->m_seqno < min_seq)
 724             {
 725                 min_seq = c->m_seqno;
 726                 c_min = c;
 727             }
 728         }
 729         if (no_of_clients >= parent->m_max_clients)
 730         {
 731             c = c_min;
 732             if (c->m_waiting || strcmp(m_proxyTarget, c->get_hostname()))
 733             {
 734                 yaz_log (YLOG_LOG, "%sMAXCLIENTS %d Destroy %d",
 735                          m_session_str, parent->m_max_clients, c->m_seqno);
 736                 if (c->m_server && c->m_server != this)
 737                     c->m_server->dec_ref(true);
 738             }
 739             else
 740             {
 741                 yaz_log (YLOG_LOG, "%sMAXCLIENTS %d Reuse %d %d %s",
 742                          m_session_str, parent->m_max_clients,
 743                          c->m_seqno, parent->m_seqno, c->get_hostname());
 744                 xfree (c->m_cookie);
 745                 c->m_cookie = 0;
 746                 if (cookie)
 747                     c->m_cookie = xstrdup(cookie);
 748                 c->m_seqno = parent->m_seqno;
 749                 if (c->m_server && c->m_server != this)
 750                 {
 751                     c->m_server->m_client = 0;
 752                     c->m_server->dec_ref(true);
 753                 }
 754                 (parent->m_seqno)++;
 755                 c->m_target_idletime = m_target_idletime;
 756                 c->timeout(m_target_idletime);
 757
 758                 if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 759                     c->set_APDU_yazlog(1);
 760                 else
 761                     c->set_APDU_yazlog(0);
 762
 763                 return c;
 764             }
 765         }
 766         else
 767         {
 768             yaz_log (YLOG_LOG, "%sNEW %d %s",
 769                      m_session_str, parent->m_seqno, m_proxyTarget);
 770             c = new Yaz_ProxyClient(m_PDU_Observable->clone(), parent);
 771             c->m_next = parent->m_clientPool;
 772             if (c->m_next)
 773                 c->m_next->m_prev = &c->m_next;
 774             parent->m_clientPool = c;
 775             c->m_prev = &parent->m_clientPool;
 776         }
 777
 778         xfree (c->m_cookie);
 779         c->m_cookie = 0;
 780         if (cookie)
 781             c->m_cookie = xstrdup(cookie);
 782
 783         c->m_seqno = parent->m_seqno;
 784         c->m_init_flag = 0;
 785         c->m_last_resultCount = 0;
 786         c->m_last_ok = 0;
 787         c->m_cache.clear();
 788         c->m_sr_transform = 0;
 789         c->m_waiting = 0;
 790         c->m_resultSetStartPoint = 0;
 791         (parent->m_seqno)++;
 792         if (c->client(m_proxyTarget))
 793         {
 794             delete c;
 795             return 0;
 796         }
 797         c->m_target_idletime = m_target_idletime;
 798         c->timeout(30);
 799
 800         if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 801             c->set_APDU_yazlog(1);
 802         else
 803             c->set_APDU_yazlog(0);
 804
 805         c->set_idAuthentication(apdu);
 806     }
 807     yaz_log (YLOG_DEBUG, "get_client 3 %p %p", this, c);
 808     return c;
 809 }
 810
 811 void Yaz_Proxy::display_diagrecs(Z_DiagRec **pp, int num)
 812 {
 813     int i;
 814     for (i = 0; i<num; i++)
 815     {
 816         oident *ent;
 817         Z_DefaultDiagFormat *r;
 818         Z_DiagRec *p = pp[i];
 819         if (p->which != Z_DiagRec_defaultFormat)
 820         {
 821             yaz_log(YLOG_LOG, "%sError no diagnostics", m_session_str);
 822             return;
 823         }
 824         else
 825             r = p->u.defaultFormat;
 826         if (!(ent = oid_getentbyoid(r->diagnosticSetId)) ||
 827             ent->oclass != CLASS_DIAGSET || ent->value != VAL_BIB1)
 828             yaz_log(YLOG_LOG, "%sError unknown diagnostic set", m_session_str);
 829         switch (r->which)
 830         {
 831         case Z_DefaultDiagFormat_v2Addinfo:
 832             yaz_log(YLOG_LOG, "%sError %d %s:%s",
 833                     m_session_str,
 834                     *r->condition, diagbib1_str(*r->condition),
 835                     r->u.v2Addinfo);
 836             break;
 837         case Z_DefaultDiagFormat_v3Addinfo:
 838             yaz_log(YLOG_LOG, "%sError %d %s:%s",
 839                     m_session_str,
 840                     *r->condition, diagbib1_str(*r->condition),
 841                     r->u.v3Addinfo);
 842             break;
 843         }
 844     }
 845 }
 846
 847 int Yaz_Proxy::convert_xsl(Z_NamePlusRecordList *p, Z_APDU *apdu)
 848 {
 849     if (!m_stylesheet_xsp || p->num_records <= 0)
 850     {
 851         return 0;  /* no XSLT to be done ... */
 852     }
 853
 854     m_stylesheet_offset = 0;
 855     m_stylesheet_nprl = p;
 856     m_stylesheet_apdu = apdu;
 857     m_timeout_mode = timeout_xsl;
 858
 859     timeout(0);
 860     return 1;
 861 }
 862
 863 void Yaz_Proxy::convert_xsl_delay()
 864 {
 865 #if HAVE_XSLT
 866     Z_NamePlusRecord *npr = m_stylesheet_nprl->records[m_stylesheet_offset];
 867     if (npr->which == Z_NamePlusRecord_databaseRecord)
 868     {
 869         Z_External *r = npr->u.databaseRecord;
 870         if (r->which == Z_External_octet)
 871         {
 872 #if 0
 873             fwrite((char*) r->u.octet_aligned->buf, 1, r->u.octet_aligned->len, stdout);
 874 #endif
 875             xmlDocPtr res, doc = xmlParseMemory(
 876                 (char*) r->u.octet_aligned->buf,
 877                 r->u.octet_aligned->len);
 878
 879
 880             yaz_log(YLOG_LOG, "%sXSLT convert %d",
 881                     m_session_str, m_stylesheet_offset);
 882             res = xsltApplyStylesheet((xsltStylesheetPtr) m_stylesheet_xsp,
 883                                       doc, 0);
 884
 885             if (res)
 886             {
 887                 xmlChar *out_buf;
 888                 int out_len;
 889                 xmlDocDumpFormatMemory (res, &out_buf, &out_len, 1);
 890
 891                 m_stylesheet_nprl->records[m_stylesheet_offset]->
 892                     u.databaseRecord =
 893                     z_ext_record(odr_encode(), VAL_TEXT_XML,
 894                                  (char*) out_buf, out_len);
 895                 xmlFree(out_buf);
 896                 xmlFreeDoc(res);
 897             }
 898
 899             xmlFreeDoc(doc);
 900         }
 901     }
 902 #endif
 903     m_stylesheet_offset++;
 904     if (m_stylesheet_offset == m_stylesheet_nprl->num_records)
 905     {
 906         m_timeout_mode = timeout_normal;
 907         m_stylesheet_nprl = 0;
 908 #if HAVE_XSLT
 909         if (m_stylesheet_xsp)
 910             xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
 911 #endif
 912         m_stylesheet_xsp = 0;
 913         timeout(m_client_idletime);
 914         send_PDU_convert(m_stylesheet_apdu);
 915     }
 916     else
 917         timeout(0);
 918 }
 919
 920 void Yaz_Proxy::convert_to_frontend_type(Z_NamePlusRecordList *p)
 921 {
 922     if (m_frontend_type != VAL_NONE)
 923     {
 924         int i;
 925         for (i = 0; i < p->num_records; i++)
 926         {
 927             Z_NamePlusRecord *npr = p->records[i];
 928             if (npr->which == Z_NamePlusRecord_databaseRecord)
 929             {
 930                 Z_External *r = npr->u.databaseRecord;
 931                 if (r->which == Z_External_octet)
 932                 {
 933 #if HAVE_USEMARCON
 934                     if (m_usemarcon_ini_stage1 && *m_usemarcon_ini_stage1)
 935                     {
 936                         if (!m_usemarcon->m_stage1)
 937                         {
 938                             m_usemarcon->m_stage1 = new CDetails();
 939                         }
 940                         m_usemarcon->m_stage1->SetIniFileName(m_usemarcon_ini_stage1);
 941                         m_usemarcon->m_stage1->SetMarcRecord((char*) r->u.octet_aligned->buf, r->u.octet_aligned->len);
 942                         int res = m_usemarcon->m_stage1->Start();
 943                         if (res == 0)
 944                         {
 945                             char *converted;
 946                             int convlen;
 947                             m_usemarcon->m_stage1->GetMarcRecord(converted, convlen);
 948                             if (m_usemarcon_ini_stage2 && *m_usemarcon_ini_stage2)
 949                             {
 950                                 if (!m_usemarcon->m_stage2)
 951                                 {
 952                                     m_usemarcon->m_stage2 = new CDetails();
 953                                 }
 954                                 m_usemarcon->m_stage2->SetIniFileName(m_usemarcon_ini_stage2);
 955                                 m_usemarcon->m_stage2->SetMarcRecord(converted, convlen);
 956                                 res = m_usemarcon->m_stage2->Start();
 957                                 if (res == 0)
 958                                 {
 959                                     free(converted);
 960                                     m_usemarcon->m_stage2->GetMarcRecord(converted, convlen);
 961                                 }
 962                                 else
 963                                 {
 964                                     yaz_log(YLOG_LOG, "%sUSEMARCON stage 2 error %d", m_session_str, res);
 965                                 }
 966                             }
 967                             npr->u.databaseRecord =
 968                                 z_ext_record(odr_encode(),
 969                                              m_frontend_type,
 970                                              converted,
 971                                              strlen(converted));
 972                             free(converted);
 973                         }
 974                         else
 975                         {
 976                             yaz_log(YLOG_LOG, "%sUSEMARCON stage 1 error %d", m_session_str, res);
 977                         }
 978                         continue;
 979                     }
 980 #endif
 981 /* HAVE_USEMARCON */
 982                     npr->u.databaseRecord =
 983                         z_ext_record(odr_encode(),
 984                                      m_frontend_type,
 985                                      (char*) r->u.octet_aligned->buf,
 986                                      r->u.octet_aligned->len);
 987                 }
 988             }
 989         }
 990     }
 991 }
 992
 993 void Yaz_Proxy::convert_records_charset(Z_NamePlusRecordList *p,
 994                                         const char *backend_charset)
 995 {
 996     int sel =   m_charset_converter->get_client_charset_selected();
 997     const char *client_record_charset =
 998         m_charset_converter->get_client_query_charset();
 999     if (sel && backend_charset && client_record_charset &&
1000         strcmp(backend_charset, client_record_charset))
1001     {
1002         int i;
1003         yaz_iconv_t cd = yaz_iconv_open(client_record_charset,
1004                                         backend_charset);
1005         yaz_marc_t mt = yaz_marc_create();
1006         yaz_marc_xml(mt, YAZ_MARC_ISO2709);
1007         yaz_marc_iconv(mt, cd);
1008         for (i = 0; i < p->num_records; i++)
1009         {
1010             Z_NamePlusRecord *npr = p->records[i];
1011             if (npr->which == Z_NamePlusRecord_databaseRecord)
1012             {
1013                 Z_External *r = npr->u.databaseRecord;
1014                 oident *ent = oid_getentbyoid(r->direct_reference);
1015                 if (!ent || ent->value == VAL_NONE)
1016                     continue;
1017
1018                 if (ent->value == VAL_SUTRS)
1019                 {
1020                     WRBUF w = wrbuf_alloc();
1021
1022                     wrbuf_iconv_write(w, cd,  (char*) r->u.octet_aligned->buf,
1023                                       r->u.octet_aligned->len);
1024                     npr->u.databaseRecord =
1025                         z_ext_record(odr_encode(), ent->value, wrbuf_buf(w),
1026                                      wrbuf_len(w));
1027                     wrbuf_free(w, 1);
1028                 }
1029                 else if (ent->value == VAL_TEXT_XML)
1030                 {
1031                     ;
1032                 }
1033                 else if (r->which == Z_External_octet)
1034                 {
1035                     int rlen;
1036                     char *result;
1037                     if (yaz_marc_decode_buf(mt,
1038                                             (char*) r->u.octet_aligned->buf,
1039                                             r->u.octet_aligned->len,
1040                                             &result, &rlen))
1041                     {
1042                         npr->u.databaseRecord =
1043                             z_ext_record(odr_encode(), ent->value, result, rlen);
1044                         yaz_log(YLOG_LOG, "%sRecoding MARC record",
1045                                 m_session_str);
1046                     }
1047                 }
1048             }
1049         }
1050         if (cd)
1051             yaz_iconv_close(cd);
1052         yaz_marc_destroy(mt);
1053     }
1054 }
1055
1056 void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p,
1057                                    const char *backend_charset)
1058 {
1059     int i;
1060     if (!backend_charset)
1061         backend_charset = "MARC-8";
1062     yaz_iconv_t cd = yaz_iconv_open("UTF-8", backend_charset);
1063     yaz_marc_t mt = yaz_marc_create();
1064     yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1065     yaz_marc_iconv(mt, cd);
1066     for (i = 0; i < p->num_records; i++)
1067     {
1068         Z_NamePlusRecord *npr = p->records[i];
1069         if (npr->which == Z_NamePlusRecord_databaseRecord)
1070         {
1071             Z_External *r = npr->u.databaseRecord;
1072             if (r->which == Z_External_OPAC)
1073             {
1074                 WRBUF w = wrbuf_alloc();
1075
1076                 yaz_opac_decode_wrbuf(mt, r->u.opac, w);
1077                 npr->u.databaseRecord = z_ext_record(
1078                     odr_encode(), VAL_TEXT_XML,
1079                     wrbuf_buf(w), wrbuf_len(w)
1080                     );
1081                 wrbuf_free(w, 1);
1082             }
1083             else if (r->which == Z_External_octet)
1084             {
1085                 int rlen;
1086                 char *result;
1087                 if (yaz_marc_decode_buf(mt, (char*) r->u.octet_aligned->buf,
1088                                         r->u.octet_aligned->len,
1089                                         &result, &rlen))
1090                 {
1091                     npr->u.databaseRecord =
1092                         z_ext_record(odr_encode(), VAL_TEXT_XML, result, rlen);
1093                 }
1094             }
1095         }
1096     }
1097     if (cd)
1098         yaz_iconv_close(cd);
1099     yaz_marc_destroy(mt);
1100 }
1101
1102 void Yaz_Proxy::logtime()
1103 {
1104 #if HAVE_GETTIMEOFDAY
1105     struct timeval *tv = (struct timeval*) m_time_tv;
1106     if (tv->tv_sec)
1107     {
1108         struct timeval tv1;
1109         gettimeofday(&tv1, 0);
1110         long diff = (tv1.tv_sec - tv->tv_sec)*1000000 +
1111             (tv1.tv_usec - tv->tv_usec);
1112         if (diff >= 0)
1113             yaz_log(YLOG_LOG, "%sElapsed %ld.%03ld", m_session_str,
1114                     diff/1000000, (diff/1000)%1000);
1115     }
1116     tv->tv_sec = 0;
1117     tv->tv_usec = 0;
1118 #endif
1119 }
1120
1121 int Yaz_Proxy::send_http_response(int code)
1122 {
1123     ODR o = odr_encode();
1124     Z_GDU *gdu = z_get_HTTP_Response(o, code);
1125     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
1126     if (m_http_version)
1127         hres->version = odr_strdup(o, m_http_version);
1128     if (m_http_keepalive)
1129         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1130     else
1131         timeout(0);
1132
1133     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
1134     {
1135         yaz_log (YLOG_LOG, "%sSending %s to client", m_session_str,
1136                  gdu_name(gdu));
1137     }
1138     int len;
1139     int r = send_GDU(gdu, &len);
1140     m_bytes_sent += len;
1141     m_bw_stat.add_bytes(len);
1142     logtime();
1143
1144     recv_GDU_more(true);
1145
1146     return r;
1147 }
1148
1149 int Yaz_Proxy::send_srw_response(Z_SRW_PDU *srw_pdu, int http_code /* = 200 */)
1150 {
1151     ODR o = odr_encode();
1152     const char *ctype = "text/xml";
1153     Z_GDU *gdu = z_get_HTTP_Response(o, http_code);
1154     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
1155     if (m_http_version)
1156         hres->version = odr_strdup(o, m_http_version);
1157     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1158     if (m_http_keepalive)
1159         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1160     else
1161         timeout(0);
1162     if (http_code == 401)
1163         z_HTTP_header_add(o, &hres->headers, "WWW-Authenticate", "Basic realm=\"YAZ Proxy\"");
1164
1165     static Z_SOAP_Handler soap_handlers[2] = {
1166 #if HAVE_XSLT
1167         {"http://www.loc.gov/zing/srw/", 0,
1168          (Z_SOAP_fun) yaz_srw_codec},
1169 #endif
1170         {0, 0, 0}
1171     };
1172
1173     Z_SOAP *soap_package = (Z_SOAP*) odr_malloc(o, sizeof(Z_SOAP));
1174     soap_package->which = Z_SOAP_generic;
1175     soap_package->u.generic =
1176         (Z_SOAP_Generic *) odr_malloc(o,  sizeof(*soap_package->u.generic));
1177     soap_package->u.generic->no = 0;
1178     soap_package->u.generic->ns = soap_handlers[0].ns;
1179     soap_package->u.generic->p = (void *) srw_pdu;
1180     soap_package->ns = m_soap_ns;
1181     z_soap_codec_enc_xsl(o, &soap_package,
1182                          &hres->content_buf, &hres->content_len,
1183                          soap_handlers, 0, m_s2z_stylesheet);
1184     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
1185     {
1186         yaz_log (YLOG_LOG, "%sSending %s to client", m_session_str,
1187                  gdu_name(gdu));
1188     }
1189     int len;
1190     int r = send_GDU(gdu, &len);
1191     m_bytes_sent += len;
1192     m_bw_stat.add_bytes(len);
1193     logtime();
1194
1195     recv_GDU_more(true);
1196
1197     return r;
1198 }
1199
1200 int Yaz_Proxy::send_to_srw_client_error(int srw_error, const char *add)
1201 {
1202     ODR o = odr_encode();
1203     Z_SRW_diagnostic *diagnostic = (Z_SRW_diagnostic *)
1204         odr_malloc(o, sizeof(*diagnostic));
1205     int num_diagnostic = 1;
1206     yaz_mk_std_diagnostic(o, diagnostic, srw_error, add);
1207     return send_srw_search_response(diagnostic, num_diagnostic, srw_error == 3 ? 401 : 200);
1208 }
1209
1210 int Yaz_Proxy::z_to_srw_diag(ODR o, Z_SRW_searchRetrieveResponse *srw_res,
1211                              Z_DefaultDiagFormat *ddf)
1212 {
1213     int bib1_code = *ddf->condition;
1214     if (bib1_code == 109)
1215         return 404;
1216     srw_res->num_diagnostics = 1;
1217     srw_res->diagnostics = (Z_SRW_diagnostic *)
1218         odr_malloc(o, sizeof(*srw_res->diagnostics));
1219     yaz_mk_std_diagnostic(o, srw_res->diagnostics,
1220                           yaz_diag_bib1_to_srw(*ddf->condition),
1221                           ddf->u.v2Addinfo);
1222     return 0;
1223 }
1224
1225 int Yaz_Proxy::send_to_srw_client_ok(int hits, Z_Records *records, int start)
1226 {
1227     ODR o = odr_encode();
1228     Z_SRW_PDU *srw_pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
1229     Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
1230
1231     srw_res->numberOfRecords = odr_intdup (o, hits);
1232     if (records && records->which == Z_Records_DBOSD)
1233     {
1234         srw_res->num_records =
1235             records->u.databaseOrSurDiagnostics->num_records;
1236         int i;
1237         srw_res->records = (Z_SRW_record *)
1238             odr_malloc(o, srw_res->num_records * sizeof(Z_SRW_record));
1239         for (i = 0; i < srw_res->num_records; i++)
1240         {
1241             Z_NamePlusRecord *npr = records->u.databaseOrSurDiagnostics->records[i];
1242             if (npr->which != Z_NamePlusRecord_databaseRecord)
1243             {
1244                 srw_res->records[i].recordSchema = "diagnostic";
1245                 srw_res->records[i].recordPacking = m_s2z_packing;
1246                 srw_res->records[i].recordData_buf = "67";
1247                 srw_res->records[i].recordData_len = 2;
1248                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
1249                 continue;
1250             }
1251             Z_External *r = npr->u.databaseRecord;
1252             oident *ent = oid_getentbyoid(r->direct_reference);
1253             if (r->which == Z_External_octet && ent->value == VAL_TEXT_XML)
1254             {
1255                 srw_res->records[i].recordSchema = m_schema;
1256                 srw_res->records[i].recordPacking = m_s2z_packing;
1257                 srw_res->records[i].recordData_buf = (char*)
1258                     r->u.octet_aligned->buf;
1259                 srw_res->records[i].recordData_len = r->u.octet_aligned->len;
1260                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
1261             }
1262             else
1263             {
1264                 srw_res->records[i].recordSchema = "diagnostic";
1265                 srw_res->records[i].recordPacking = m_s2z_packing;
1266                 srw_res->records[i].recordData_buf = "67";
1267                 srw_res->records[i].recordData_len = 2;
1268                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
1269             }
1270         }
1271     }
1272     if (records && records->which == Z_Records_NSD)
1273     {
1274         int http_code;
1275         http_code = z_to_srw_diag(odr_encode(), srw_res,
1276                                    records->u.nonSurrogateDiagnostic);
1277         if (http_code)
1278             return send_http_response(http_code);
1279     }
1280     return send_srw_response(srw_pdu);
1281
1282 }
1283
1284 int Yaz_Proxy::send_srw_search_response(Z_SRW_diagnostic *diagnostics,
1285                                         int num_diagnostics, int http_code /* = 200 */)
1286 {
1287     ODR o = odr_encode();
1288     Z_SRW_PDU *srw_pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
1289     Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
1290
1291     srw_res->num_diagnostics = num_diagnostics;
1292     srw_res->diagnostics = diagnostics;
1293     return send_srw_response(srw_pdu, http_code);
1294 }
1295
1296 int Yaz_Proxy::send_srw_explain_response(Z_SRW_diagnostic *diagnostics,
1297                                         int num_diagnostics)
1298 {
1299     Yaz_ProxyConfig *cfg = check_reconfigure();
1300     if (cfg)
1301     {
1302         int len;
1303         char *b = cfg->get_explain_doc(odr_encode(), 0 /* target */,
1304                                        m_s2z_database, &len);
1305         if (b)
1306         {
1307             Z_SRW_PDU *res = yaz_srw_get(odr_encode(), Z_SRW_explain_response);
1308             Z_SRW_explainResponse *er = res->u.explain_response;
1309
1310             er->record.recordData_buf = b;
1311             er->record.recordData_len = len;
1312             er->record.recordPacking = m_s2z_packing;
1313             er->record.recordSchema = "http://explain.z3950.org/dtd/2.0/";
1314
1315             er->diagnostics = diagnostics;
1316             er->num_diagnostics = num_diagnostics;
1317             return send_srw_response(res);
1318         }
1319     }
1320     return send_http_response(404);
1321 }
1322
1323 int Yaz_Proxy::send_PDU_convert(Z_APDU *apdu)
1324 {
1325     if (m_http_version)
1326     {
1327         if (apdu->which == Z_APDU_initResponse)
1328         {
1329             Z_InitResponse *res = apdu->u.initResponse;
1330             if (*res->result == 0)
1331             {
1332                 send_to_srw_client_error(3, 0);
1333             }
1334             else if (!m_s2z_search_apdu)
1335             {
1336                 send_srw_explain_response(0, 0);
1337             }
1338             else
1339             {
1340                 handle_incoming_Z_PDU(m_s2z_search_apdu);
1341             }
1342         }
1343         else if (m_s2z_search_apdu && apdu->which == Z_APDU_searchResponse)
1344         {
1345             m_s2z_search_apdu = 0;
1346             Z_SearchResponse *res = apdu->u.searchResponse;
1347             m_s2z_hit_count = *res->resultCount;
1348             if (res->records && res->records->which == Z_Records_NSD)
1349             {
1350                 send_to_srw_client_ok(0, res->records, 1);
1351             }
1352             else if (m_s2z_present_apdu && m_s2z_hit_count > 0)
1353             {
1354                 // adjust
1355                 Z_PresentRequest *pr = m_s2z_present_apdu->u.presentRequest;
1356
1357                 if (*pr->resultSetStartPoint <= m_s2z_hit_count)
1358                 {
1359                     if (*pr->numberOfRecordsRequested+ *pr->resultSetStartPoint
1360                         > m_s2z_hit_count)
1361                         *pr->numberOfRecordsRequested =
1362                             1 + m_s2z_hit_count - *pr->resultSetStartPoint;
1363                 }
1364                 handle_incoming_Z_PDU(m_s2z_present_apdu);
1365             }
1366             else
1367             {
1368                 m_s2z_present_apdu = 0;
1369                 send_to_srw_client_ok(m_s2z_hit_count, res->records, 1);
1370             }
1371         }
1372         else if (m_s2z_present_apdu && apdu->which == Z_APDU_presentResponse)
1373         {
1374             int start =
1375                 *m_s2z_present_apdu->u.presentRequest->resultSetStartPoint;
1376
1377             m_s2z_present_apdu = 0;
1378             Z_PresentResponse *res = apdu->u.presentResponse;
1379             send_to_srw_client_ok(m_s2z_hit_count, res->records, start);
1380         }
1381     }
1382     else
1383     {
1384         int len = 0;
1385         if (m_log_mask & PROXY_LOG_REQ_CLIENT)
1386             yaz_log (YLOG_LOG, "%sSending %s to client", m_session_str,
1387                      apdu_name(apdu));
1388         int r = send_Z_PDU(apdu, &len);
1389         m_bytes_sent += len;
1390         m_bw_stat.add_bytes(len);
1391         logtime();
1392         return r;
1393     }
1394     return 0;
1395 }
1396
1397 int Yaz_Proxy::send_to_client(Z_APDU *apdu)
1398 {
1399     int kill_session = 0;
1400     Z_ReferenceId **new_id = get_referenceIdP(apdu);
1401
1402     if (new_id)
1403         *new_id = m_referenceId;
1404
1405     if (apdu->which == Z_APDU_searchResponse)
1406     {
1407         Z_SearchResponse *sr = apdu->u.searchResponse;
1408         Z_Records *p = sr->records;
1409         if (p && p->which == Z_Records_NSD)
1410         {
1411             Z_DiagRec dr, *dr_p = &dr;
1412             dr.which = Z_DiagRec_defaultFormat;
1413             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
1414
1415             *sr->searchStatus = 0;
1416             display_diagrecs(&dr_p, 1);
1417         }
1418         else
1419         {
1420             if (p && p->which == Z_Records_DBOSD)
1421             {
1422                 if (m_backend_type
1423 #if HAVE_USEMARCON
1424                     || m_usemarcon_ini_stage1 || m_usemarcon_ini_stage2
1425 #endif
1426                     )
1427                     convert_to_frontend_type(p->u.databaseOrSurDiagnostics);
1428                 if (m_marcxml_mode == marcxml)
1429                     convert_to_marcxml(p->u.databaseOrSurDiagnostics,
1430                                        m_backend_charset);
1431                 else
1432                     convert_records_charset(p->u.databaseOrSurDiagnostics,
1433                                             m_backend_charset);
1434                 if (convert_xsl(p->u.databaseOrSurDiagnostics, apdu))
1435                     return 0;
1436
1437             }
1438             if (sr->resultCount)
1439             {
1440                 yaz_log(YLOG_LOG, "%s%d hits", m_session_str,
1441                         *sr->resultCount);
1442                 if (*sr->resultCount < 0)
1443                 {
1444                     m_flag_invalid_session = 1;
1445                     kill_session = 1;
1446
1447                     *sr->searchStatus = 0;
1448                     sr->records =
1449                         create_nonSurrogateDiagnostics(odr_encode(), 2, 0);
1450                     *sr->resultCount = 0;
1451                 }
1452             }
1453         }
1454     }
1455     else if (apdu->which == Z_APDU_presentResponse)
1456     {
1457         Z_PresentResponse *sr = apdu->u.presentResponse;
1458         Z_Records *p = sr->records;
1459         if (p && p->which == Z_Records_NSD)
1460         {
1461             Z_DiagRec dr, *dr_p = &dr;
1462             dr.which = Z_DiagRec_defaultFormat;
1463             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
1464             if (*sr->presentStatus == Z_PresentStatus_success)
1465                 *sr->presentStatus = Z_PresentStatus_failure;
1466             display_diagrecs(&dr_p, 1);
1467         }
1468         if (p && p->which == Z_Records_DBOSD)
1469         {
1470             if (m_backend_type
1471 #if HAVE_USEMARCON
1472                 || m_usemarcon_ini_stage1 || m_usemarcon_ini_stage2
1473 #endif
1474                 )
1475                 convert_to_frontend_type(p->u.databaseOrSurDiagnostics);
1476             if (m_marcxml_mode == marcxml)
1477                 convert_to_marcxml(p->u.databaseOrSurDiagnostics,
1478                                    m_backend_charset);
1479             else
1480                 convert_records_charset(p->u.databaseOrSurDiagnostics,
1481                                         m_backend_charset);
1482             if (convert_xsl(p->u.databaseOrSurDiagnostics, apdu))
1483                 return 0;
1484         }
1485     }
1486     else if (apdu->which == Z_APDU_initResponse)
1487     {
1488         //Get and check negotiation record
1489         //from init response.
1490         handle_charset_lang_negotiation(apdu);
1491
1492         if (m_initRequest_options)
1493         {
1494             Z_Options *nopt =
1495                 (Odr_bitmask *)odr_malloc(odr_encode(),
1496                                           sizeof(Odr_bitmask));
1497             ODR_MASK_ZERO(nopt);
1498
1499             int i;
1500             for (i = 0; i<24; i++)
1501                 if (ODR_MASK_GET(m_initRequest_options, i) &&
1502                     ODR_MASK_GET(apdu->u.initResponse->options, i))
1503                     ODR_MASK_SET(nopt, i);
1504             apdu->u.initResponse->options = nopt;
1505         }
1506         if (m_initRequest_version)
1507         {
1508             Z_ProtocolVersion *nopt =
1509                 (Odr_bitmask *)odr_malloc(odr_encode(),
1510                                           sizeof(Odr_bitmask));
1511             ODR_MASK_ZERO(nopt);
1512
1513             int i;
1514             for (i = 0; i<8; i++)
1515                 if (ODR_MASK_GET(m_initRequest_version, i) &&
1516                     ODR_MASK_GET(apdu->u.initResponse->protocolVersion, i))
1517                     ODR_MASK_SET(nopt, i);
1518             apdu->u.initResponse->protocolVersion = nopt;
1519         }
1520         apdu->u.initResponse->preferredMessageSize =
1521             odr_intdup(odr_encode(),
1522                        m_client->m_initResponse_preferredMessageSize >
1523                        m_initRequest_preferredMessageSize ?
1524                        m_initRequest_preferredMessageSize :
1525                        m_client->m_initResponse_preferredMessageSize);
1526         apdu->u.initResponse->maximumRecordSize =
1527             odr_intdup(odr_encode(),
1528                        m_client->m_initResponse_maximumRecordSize >
1529                        m_initRequest_maximumRecordSize ?
1530                        m_initRequest_maximumRecordSize :
1531                        m_client->m_initResponse_maximumRecordSize);
1532     }
1533
1534     int r = send_PDU_convert(apdu);
1535     if (r)
1536         return r;
1537     if (kill_session)
1538     {
1539         delete m_client;
1540         m_client = 0;
1541         m_parent->pre_init();
1542     }
1543     return r;
1544 }
1545
1546 void Yaz_ProxyClient::set_idAuthentication(Z_APDU *apdu)
1547 {
1548     Z_IdAuthentication *t = apdu->u.initRequest->idAuthentication;
1549
1550     odr_reset(m_idAuthentication_odr);
1551     z_IdAuthentication(m_idAuthentication_odr, &t, 1, 0);
1552     m_idAuthentication_ber_buf =
1553         odr_getbuf(m_idAuthentication_odr,
1554                    &m_idAuthentication_ber_size, 0);
1555 }
1556
1557 bool Yaz_ProxyClient::compare_charset(Z_APDU *apdu)
1558 {
1559     return true;
1560 }
1561
1562 bool Yaz_ProxyClient::compare_idAuthentication(Z_APDU *apdu)
1563 {
1564     Z_IdAuthentication *t = apdu->u.initRequest->idAuthentication;
1565     ODR odr = odr_createmem(ODR_ENCODE);
1566
1567     z_IdAuthentication(odr, &t, 1, 0);
1568     int sz;
1569     char *buf = odr_getbuf(odr, &sz, 0);
1570     if (buf && m_idAuthentication_ber_buf
1571         && sz == m_idAuthentication_ber_size
1572         && !memcmp(m_idAuthentication_ber_buf, buf, sz))
1573     {
1574         odr_destroy(odr);
1575         return true;
1576     }
1577     odr_destroy(odr);
1578     if (!buf && !m_idAuthentication_ber_buf)
1579         return true;
1580     return false;
1581 }
1582
1583 int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
1584 {
1585     int len = 0;
1586     const char *apdu_name_tmp = apdu_name(apdu);
1587     int r = send_Z_PDU(apdu, &len);
1588     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
1589         yaz_log (YLOG_LOG, "%sSending %s to %s %d bytes",
1590                  get_session_str(),
1591                  apdu_name_tmp, get_hostname(), len);
1592     m_bytes_sent += len;
1593     return r;
1594 }
1595
1596 Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
1597 {
1598     if (apdu->which == Z_APDU_presentRequest)
1599     {
1600         Z_PresentRequest *pr = apdu->u.presentRequest;
1601         int toget = *pr->numberOfRecordsRequested;
1602         int start = *pr->resultSetStartPoint;
1603
1604         yaz_log(YLOG_LOG, "%sPresent %s %d+%d", m_session_str,
1605                 pr->resultSetId, start, toget);
1606
1607         if (*m_parent->m_optimize == '0')
1608             return apdu;
1609
1610         if (!m_client->m_last_resultSetId)
1611         {
1612             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1613             new_apdu->u.presentResponse->records =
1614                 create_nonSurrogateDiagnostics(odr_encode(), 30,
1615                                                pr->resultSetId);
1616             send_to_client(new_apdu);
1617             return 0;
1618         }
1619         if (!strcmp(m_client->m_last_resultSetId, pr->resultSetId))
1620         {
1621             if (start+toget-1 > m_client->m_last_resultCount)
1622             {
1623                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1624                 new_apdu->u.presentResponse->records =
1625                     create_nonSurrogateDiagnostics(odr_encode(), 13, 0);
1626                 send_to_client(new_apdu);
1627                 return 0;
1628             }
1629             Z_NamePlusRecordList *npr;
1630 #if 0
1631             yaz_log(YLOG_LOG, "%sCache lookup %d+%d syntax=%s",
1632                     m_session_str, start, toget, yaz_z3950oid_to_str(
1633                         pr->preferredRecordSyntax, &oclass));
1634 #endif
1635             if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
1636                                           pr->preferredRecordSyntax,
1637                                           pr->recordComposition))
1638             {
1639                 yaz_log (YLOG_LOG, "%sReturned cached records for present request",
1640                          m_session_str);
1641                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1642                 new_apdu->u.presentResponse->referenceId = pr->referenceId;
1643
1644                 new_apdu->u.presentResponse->numberOfRecordsReturned
1645                     = odr_intdup(odr_encode(), toget);
1646
1647                 new_apdu->u.presentResponse->records = (Z_Records*)
1648                     odr_malloc(odr_encode(), sizeof(Z_Records));
1649                 new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
1650                 new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
1651                 new_apdu->u.presentResponse->nextResultSetPosition =
1652                     odr_intdup(odr_encode(), start+toget);
1653
1654                 send_to_client(new_apdu);
1655                 return 0;
1656             }
1657         }
1658     }
1659
1660     if (apdu->which != Z_APDU_searchRequest)
1661         return apdu;
1662     Z_SearchRequest *sr = apdu->u.searchRequest;
1663     Yaz_Z_Query *this_query = new Yaz_Z_Query;
1664     Yaz_Z_Databases this_databases;
1665
1666     this_databases.set(sr->num_databaseNames, (const char **)
1667                        sr->databaseNames);
1668
1669     this_query->set_Z_Query(sr->query);
1670
1671     char query_str[120];
1672     this_query->print(query_str, sizeof(query_str)-1);
1673     yaz_log(YLOG_LOG, "%sSearch %s", m_session_str, query_str);
1674
1675     if (*m_parent->m_optimize != '0' &&
1676         m_client->m_last_ok && m_client->m_last_query &&
1677         m_client->m_last_query->match(this_query) &&
1678         !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
1679         m_client->m_last_databases.match(this_databases))
1680     {
1681         delete this_query;
1682         if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
1683             m_client->m_last_resultCount < *sr->largeSetLowerBound)
1684         {
1685             Z_NamePlusRecordList *npr;
1686             int toget = *sr->mediumSetPresentNumber;
1687             Z_RecordComposition *comp = 0;
1688
1689             if (toget > m_client->m_last_resultCount)
1690                 toget = m_client->m_last_resultCount;
1691
1692             if (sr->mediumSetElementSetNames)
1693             {
1694                 comp = (Z_RecordComposition *)
1695                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1696                 comp->which = Z_RecordComp_simple;
1697                 comp->u.simple = sr->mediumSetElementSetNames;
1698             }
1699
1700             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1701                                           sr->preferredRecordSyntax, comp))
1702             {
1703                 yaz_log (YLOG_LOG, "%sReturned cached records for medium set",
1704                          m_session_str);
1705                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1706                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1707                 new_apdu->u.searchResponse->resultCount =
1708                     &m_client->m_last_resultCount;
1709
1710                 new_apdu->u.searchResponse->numberOfRecordsReturned
1711                     = odr_intdup(odr_encode(), toget);
1712
1713                 new_apdu->u.searchResponse->presentStatus =
1714                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1715                 new_apdu->u.searchResponse->records = (Z_Records*)
1716                     odr_malloc(odr_encode(), sizeof(Z_Records));
1717                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1718                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1719                 new_apdu->u.searchResponse->nextResultSetPosition =
1720                     odr_intdup(odr_encode(), toget+1);
1721                 send_to_client(new_apdu);
1722                 return 0;
1723             }
1724             else
1725             {
1726                 // medium Set
1727                 // send present request (medium size)
1728                 yaz_log (YLOG_LOG, "%sOptimizing search for medium set",
1729                          m_session_str);
1730
1731                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1732                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1733                 pr->referenceId = sr->referenceId;
1734                 pr->resultSetId = sr->resultSetName;
1735                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1736                 *pr->numberOfRecordsRequested = toget;
1737                 pr->recordComposition = comp;
1738                 m_client->m_sr_transform = 1;
1739                 return new_apdu;
1740             }
1741         }
1742         else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
1743             m_client->m_last_resultCount <= 0)
1744         {
1745             // large set. Return pseudo-search response immediately
1746             yaz_log (YLOG_LOG, "%sOptimizing search for large set",
1747                      m_session_str);
1748             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1749             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1750             new_apdu->u.searchResponse->resultCount =
1751                 &m_client->m_last_resultCount;
1752             send_to_client(new_apdu);
1753             return 0;
1754         }
1755         else
1756         {
1757             Z_NamePlusRecordList *npr;
1758             int toget = m_client->m_last_resultCount;
1759             Z_RecordComposition *comp = 0;
1760             // small set
1761             // send a present request (small set)
1762
1763             if (sr->smallSetElementSetNames)
1764             {
1765                 comp = (Z_RecordComposition *)
1766                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1767                 comp->which = Z_RecordComp_simple;
1768                 comp->u.simple = sr->smallSetElementSetNames;
1769             }
1770
1771             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1772                                           sr->preferredRecordSyntax, comp))
1773             {
1774                 yaz_log (YLOG_LOG, "%sReturned cached records for small set",
1775                          m_session_str);
1776                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1777                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1778                 new_apdu->u.searchResponse->resultCount =
1779                     &m_client->m_last_resultCount;
1780
1781                 new_apdu->u.searchResponse->numberOfRecordsReturned
1782                     = odr_intdup(odr_encode(), toget);
1783
1784                 new_apdu->u.searchResponse->presentStatus =
1785                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1786                 new_apdu->u.searchResponse->records = (Z_Records*)
1787                     odr_malloc(odr_encode(), sizeof(Z_Records));
1788                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1789                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1790                 new_apdu->u.searchResponse->nextResultSetPosition =
1791                     odr_intdup(odr_encode(), toget+1);
1792                 send_to_client(new_apdu);
1793                 return 0;
1794             }
1795             else
1796             {
1797                 yaz_log (YLOG_LOG, "%sOptimizing search for small set",
1798                          m_session_str);
1799                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1800                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1801                 pr->referenceId = sr->referenceId;
1802                 pr->resultSetId = sr->resultSetName;
1803                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1804                 *pr->numberOfRecordsRequested = toget;
1805                 pr->recordComposition = comp;
1806                 m_client->m_sr_transform = 1;
1807                 return new_apdu;
1808             }
1809         }
1810     }
1811     else  // query doesn't match
1812     {
1813         delete m_client->m_last_query;
1814         m_client->m_last_query = this_query;
1815         m_client->m_last_ok = 0;
1816         m_client->m_cache.clear();
1817         m_client->m_resultSetStartPoint = 0;
1818
1819         xfree (m_client->m_last_resultSetId);
1820         m_client->m_last_resultSetId = xstrdup (sr->resultSetName);
1821
1822         m_client->m_last_databases.set(sr->num_databaseNames,
1823                                        (const char **) sr->databaseNames);
1824     }
1825     return apdu;
1826 }
1827
1828
1829 void Yaz_Proxy::inc_request_no()
1830 {
1831     m_request_no++;
1832     char *cp = m_session_str + strlen(m_session_str)-1;
1833     if (*cp == ' ')
1834         cp--;
1835     while (*cp && *cp != ' ')
1836         cp--;
1837     if (*cp)
1838         sprintf(cp+1, "%d ", m_request_no);
1839 }
1840
1841 void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
1842 {
1843     inc_request_no();
1844
1845     m_bytes_recv += len;
1846
1847     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
1848         yaz_log (YLOG_LOG, "%sReceiving %s from client %d bytes",
1849                  m_session_str, gdu_name(apdu), len);
1850
1851 #if HAVE_GETTIMEOFDAY
1852     gettimeofday((struct timeval *) m_time_tv, 0);
1853 #endif
1854     m_bw_stat.add_bytes(len);
1855     m_pdu_stat.add_bytes(1);
1856
1857     GDU *gdu = new GDU(apdu);
1858     m_in_queue.enqueue(gdu);
1859
1860     recv_GDU_more(false);
1861 }
1862
1863 void Yaz_Proxy::HTTP_Forwarded(Z_GDU *z_gdu)
1864 {
1865     if (z_gdu->which == Z_GDU_HTTP_Request)
1866     {
1867         Z_HTTP_Request *hreq = z_gdu->u.HTTP_Request;
1868         const char *x_forwarded_for =
1869             z_HTTP_header_lookup(hreq->headers, "X-Forwarded-For");
1870         if (x_forwarded_for)
1871         {
1872             xfree(m_peername);
1873             m_peername = (char*) xmalloc(strlen(x_forwarded_for)+5);
1874             sprintf(m_peername, "tcp:%s", x_forwarded_for);
1875
1876             yaz_log(YLOG_LOG, "%sHTTP Forwarded from %s", m_session_str,
1877                     m_peername);
1878             if (m_log_mask & PROXY_LOG_IP_CLIENT)
1879                 sprintf(m_session_str, "%ld:%d %.80s %d ",
1880                         (long) time(0), m_session_no, m_peername, m_request_no);
1881             else
1882                 sprintf(m_session_str, "%ld:%d %d ",
1883                         (long) time(0), m_session_no, m_request_no);
1884         }
1885     }
1886 }
1887
1888 void Yaz_Proxy::connect_stat(bool &block, int &reduce)
1889 {
1890
1891     m_parent->m_connect.cleanup(false);
1892     m_parent->m_connect.add_connect(m_peername);
1893
1894     int connect_total = m_parent->m_connect.get_total(m_peername);
1895     int max_connect = m_parent->m_max_connect;
1896
1897     if (max_connect && connect_total > max_connect)
1898     {
1899         yaz_log(YLOG_LOG, "%sconnect not accepted total=%d max=%d",
1900                 m_session_str, connect_total, max_connect);
1901         block = true;
1902     }
1903     else
1904         block = false;
1905     yaz_log(YLOG_LOG, "%sconnect accepted total=%d", m_session_str,
1906             connect_total);
1907
1908     int limit_connect = m_parent->m_limit_connect;
1909     if (limit_connect)
1910         reduce = connect_total / limit_connect;
1911     else
1912         reduce = 0;
1913 }
1914
1915 void Yaz_Proxy::recv_GDU_reduce(GDU *gdu)
1916 {
1917     HTTP_Forwarded(gdu->get());
1918
1919     int reduce = 0;
1920
1921     if (m_request_no == 1)
1922     {
1923         bool block = false;
1924
1925         connect_stat(block, reduce);
1926
1927         if (block)
1928         {
1929             m_timeout_mode = timeout_busy;
1930             timeout(0);
1931             return;
1932         }
1933     }
1934
1935     int bw_total = m_bw_stat.get_total();
1936     int pdu_total = m_pdu_stat.get_total();
1937     int search_total = m_search_stat.get_total();
1938
1939     assert(m_timeout_mode == timeout_busy);
1940     assert(m_timeout_gdu == 0);
1941
1942     if (m_search_max)
1943         reduce += search_total / m_search_max;
1944     if (m_bw_max)
1945         reduce += (bw_total/m_bw_max);
1946     if (m_pdu_max)
1947     {
1948         if (pdu_total > m_pdu_max)
1949         {
1950             int nreduce = (m_pdu_max >= 60) ? 1 : 60/m_pdu_max;
1951             reduce = (reduce > nreduce) ? reduce : nreduce;
1952         }
1953     }
1954     m_http_version = 0;
1955
1956 #if 0
1957     /* uncomment to force a big reduce */
1958     m_timeout_mode = timeout_reduce;
1959     m_timeout_gdu = gdu;
1960     timeout(3);       // call us reduce seconds later
1961     return;
1962 #endif
1963     if (reduce)
1964     {
1965         yaz_log(YLOG_LOG, "%sdelay=%d bw=%d pdu=%d search=%d limit-bw=%d limit-pdu=%d limit-search=%d",
1966                 m_session_str, reduce, bw_total, pdu_total, search_total,
1967                 m_bw_max, m_pdu_max, m_search_max);
1968
1969         m_timeout_mode = timeout_reduce;
1970         m_timeout_gdu = gdu;
1971         timeout(reduce);       // call us reduce seconds later
1972     }
1973     else
1974         recv_GDU_normal(gdu);
1975 }
1976
1977 void Yaz_Proxy::recv_GDU_more(bool normal)
1978 {
1979     GDU *g;
1980     if (normal && m_timeout_mode == timeout_busy)
1981         m_timeout_mode = timeout_normal;
1982     while (m_timeout_mode == timeout_normal && (g = m_in_queue.dequeue()))
1983     {
1984         m_timeout_mode = timeout_busy;
1985         inc_ref();
1986         recv_GDU_reduce(g);
1987         if (dec_ref(false))
1988             break;
1989     }
1990 }
1991
1992 void Yaz_Proxy::recv_GDU_normal(GDU *gdu)
1993 {
1994     Z_GDU *apdu = 0;
1995     gdu->move_away_gdu(odr_decode(), &apdu);
1996     delete gdu;
1997
1998     if (apdu->which == Z_GDU_Z3950)
1999         handle_incoming_Z_PDU(apdu->u.z3950);
2000     else if (apdu->which == Z_GDU_HTTP_Request)
2001         handle_incoming_HTTP(apdu->u.HTTP_Request);
2002 }
2003
2004 void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
2005 {
2006     if (m_max_record_retrieve)
2007     {
2008         if (apdu->which == Z_APDU_presentRequest)
2009         {
2010             Z_PresentRequest *pr = apdu->u.presentRequest;
2011             if (pr->numberOfRecordsRequested &&
2012                 *pr->numberOfRecordsRequested > m_max_record_retrieve)
2013                 *pr->numberOfRecordsRequested = m_max_record_retrieve;
2014         }
2015     }
2016 }
2017
2018 void Yaz_Proxy::handle_charset_lang_negotiation(Z_APDU *apdu)
2019 {
2020     if (apdu->which == Z_APDU_initRequest)
2021     {
2022         if (m_initRequest_options &&
2023             !ODR_MASK_GET(m_initRequest_options, Z_Options_negotiationModel) &&
2024             (m_proxy_negotiation_charset || m_proxy_negotiation_lang))
2025         {
2026             // There is no negotiation proposal from
2027             // client's side. OK. The proxy negotiation
2028             // in use, only.
2029             Z_InitRequest *initRequest = apdu->u.initRequest;
2030             Z_OtherInformation **otherInfo;
2031             Z_OtherInformationUnit *oi;
2032             get_otherInfoAPDU(apdu, &otherInfo);
2033             oi = update_otherInformation(otherInfo, 1, NULL, 0, 0);
2034             if (oi)
2035             {
2036                 ODR_MASK_SET(initRequest->options,
2037                     Z_Options_negotiationModel);
2038                 oi->which = Z_OtherInfo_externallyDefinedInfo;
2039                 oi->information.externallyDefinedInfo =
2040                 yaz_set_proposal_charneg(odr_encode(),
2041                     (const char**)&m_proxy_negotiation_charset,
2042                     m_proxy_negotiation_charset ? 1:0,
2043                     (const char**)&m_proxy_negotiation_lang,
2044                     m_proxy_negotiation_lang ? 1:0,
2045                     1);
2046             }
2047         }
2048         else if (m_initRequest_options &&
2049                  ODR_MASK_GET(m_initRequest_options,
2050                               Z_Options_negotiationModel) &&
2051                  m_charset_converter->get_target_query_charset())
2052         {
2053             yaz_log(YLOG_LOG, "%sManaged charset negotiation: charset=%s",
2054                     m_session_str,
2055                     m_charset_converter->get_target_query_charset());
2056             Z_InitRequest *initRequest = apdu->u.initRequest;
2057             Z_CharSetandLanguageNegotiation *negotiation =
2058                 yaz_get_charneg_record (initRequest->otherInfo);
2059             if (negotiation &&
2060                 negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2061             {
2062                 NMEM nmem = nmem_create();
2063                 char **charsets = 0;
2064                 int num_charsets = 0;
2065                 char **langs = 0;
2066                 int num_langs = 0;
2067                 int selected = 0;
2068                 yaz_get_proposal_charneg (nmem, negotiation,
2069                                           &charsets, &num_charsets,
2070                                           &langs, &num_langs, &selected);
2071                 int i;
2072                 for (i = 0; i<num_charsets; i++)
2073                     yaz_log(YLOG_LOG, "%scharset %s", m_session_str,
2074                             charsets[i]);
2075                 for (i = 0; i<num_langs; i++)
2076                     yaz_log(YLOG_LOG, "%slang %s", m_session_str,
2077                             langs[i]);
2078
2079                 const char *t_charset =
2080                     m_charset_converter->get_target_query_charset();
2081                 // sweep through charsets and pick the first supported
2082                 // conversion
2083                 for (i = 0; i<num_charsets; i++)
2084                 {
2085                     const char *c_charset = charsets[i];
2086                     if (!odr_set_charset(odr_decode(), t_charset, c_charset))
2087                         break;
2088                 }
2089                 if (i != num_charsets)
2090                 {
2091                     // got one .. set up ODR for reverse direction
2092                     const char *c_charset = charsets[i];
2093                     odr_set_charset(odr_encode(), c_charset, t_charset);
2094                     m_charset_converter->set_client_query_charset(c_charset);
2095                     m_charset_converter->set_client_charset_selected(selected);
2096                 }
2097                 nmem_destroy(nmem);
2098                 ODR_MASK_CLEAR(m_initRequest_options,
2099                                Z_Options_negotiationModel);
2100                 yaz_del_charneg_record(&initRequest->otherInfo);
2101             }
2102             else
2103             {
2104                 yaz_log(YLOG_WARN, "%sUnable to decode charset package",
2105                         m_session_str);
2106             }
2107         }
2108         else if (m_charset_converter->get_target_query_charset() &&
2109             m_proxy_negotiation_default_charset)
2110         {
2111             m_charset_converter->
2112                 set_client_query_charset(m_proxy_negotiation_default_charset);
2113         }
2114     }
2115     else if (apdu->which == Z_APDU_initResponse)
2116     {
2117         Z_InitResponse *initResponse = apdu->u.initResponse;
2118         Z_OtherInformation **otherInfo;
2119         get_otherInfoAPDU(apdu, &otherInfo);
2120
2121         Z_CharSetandLanguageNegotiation *charneg = 0;
2122
2123         if (otherInfo && *otherInfo &&
2124             ODR_MASK_GET(initResponse->options, Z_Options_negotiationModel)
2125             && (charneg = yaz_get_charneg_record(*otherInfo)))
2126         {
2127             char *charset = 0;
2128             char *lang = 0;
2129             int selected = 0;
2130
2131             yaz_get_response_charneg(m_referenceId_mem, charneg,
2132                 &charset, &lang, &selected);
2133
2134             yaz_log(YLOG_LOG, "%sAccepted charset - '%s' and lang - '%s'",
2135                 m_session_str, (charset)?charset:"none", (lang)?lang:"none");
2136
2137             if (m_initRequest_options &&
2138                 ODR_MASK_GET(m_initRequest_options, Z_Options_negotiationModel))
2139             {
2140                 yaz_log(YLOG_LOG, "%sClient's negotiation record in use",
2141                     m_session_str);
2142             }
2143             else if (m_proxy_negotiation_charset || m_proxy_negotiation_lang)
2144             {
2145                 // negotiation-charset, negotiation-lang
2146                 // elements of config file in use.
2147
2148                 yaz_log(YLOG_LOG, "%sProxy's negotiation record in use",
2149                     m_session_str);
2150
2151                 // clear negotiation option.
2152                 ODR_MASK_CLEAR(initResponse->options, Z_Options_negotiationModel);
2153
2154                 // Delete negotiation (charneg-3) entry.
2155                 yaz_del_charneg_record(otherInfo);
2156             }
2157         }
2158         else
2159         {
2160             if (m_proxy_negotiation_charset || m_proxy_negotiation_lang)
2161             {
2162                 yaz_log(YLOG_LOG, "%sTarget did not honor negotiation",
2163                         m_session_str);
2164             }
2165             else if (m_charset_converter->get_client_query_charset())
2166             {
2167                 Z_OtherInformation **otherInfo;
2168                 Z_OtherInformationUnit *oi;
2169                 get_otherInfoAPDU(apdu, &otherInfo);
2170                 oi = update_otherInformation(otherInfo, 1, NULL, 0, 0);
2171                 if (oi)
2172                 {
2173                     ODR_MASK_SET(initResponse->options,
2174                                  Z_Options_negotiationModel);
2175                     if (m_initRequest_options)
2176                         ODR_MASK_SET(m_initRequest_options,
2177                                      Z_Options_negotiationModel);
2178
2179                     oi->which = Z_OtherInfo_externallyDefinedInfo;
2180                     oi->information.externallyDefinedInfo =
2181                         yaz_set_response_charneg(
2182                             odr_encode(),
2183                             m_charset_converter->get_client_query_charset(),
2184                             0 /* no lang */,
2185                             m_charset_converter->get_client_charset_selected());
2186                 }
2187             }
2188         }
2189     }
2190 }
2191
2192 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
2193                                                      int error,
2194                                                      const char *addinfo)
2195 {
2196     Z_Records *rec = (Z_Records *)
2197         odr_malloc (odr, sizeof(*rec));
2198     int *err = (int *)
2199         odr_malloc (odr, sizeof(*err));
2200     Z_DiagRec *drec = (Z_DiagRec *)
2201         odr_malloc (odr, sizeof(*drec));
2202     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
2203         odr_malloc (odr, sizeof(*dr));
2204     *err = error;
2205     rec->which = Z_Records_NSD;
2206     rec->u.nonSurrogateDiagnostic = dr;
2207     dr->diagnosticSetId =
2208         yaz_oidval_to_z3950oid (odr, CLASS_DIAGSET, VAL_BIB1);
2209     dr->condition = err;
2210     dr->which = Z_DefaultDiagFormat_v2Addinfo;
2211     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
2212     return rec;
2213 }
2214
2215 Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
2216 {
2217     if (apdu->which == Z_APDU_searchRequest &&
2218         apdu->u.searchRequest->query &&
2219         apdu->u.searchRequest->query->which == Z_Query_type_104 &&
2220         apdu->u.searchRequest->query->u.type_104->which == Z_External_CQL)
2221     {
2222         Z_RPNQuery *rpnquery = 0;
2223         Z_SearchRequest *sr = apdu->u.searchRequest;
2224         char *addinfo = 0;
2225
2226         yaz_log(YLOG_LOG, "%sCQL: %s", m_session_str,
2227                 sr->query->u.type_104->u.cql);
2228
2229         int r = m_cql2rpn.query_transform(sr->query->u.type_104->u.cql,
2230                                           &rpnquery, odr_encode(),
2231                                           &addinfo);
2232         if (r == -3)
2233             yaz_log(YLOG_LOG, "%sNo CQL to RPN table", m_session_str);
2234         else if (r)
2235         {
2236             yaz_log(YLOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
2237             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2238
2239             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2240             new_apdu->u.searchResponse->records =
2241                 create_nonSurrogateDiagnostics(odr_encode(),
2242                                                yaz_diag_srw_to_bib1(r),
2243                                                addinfo);
2244             *new_apdu->u.searchResponse->searchStatus = 0;
2245
2246             send_to_client(new_apdu);
2247
2248             return 0;
2249         }
2250         else
2251         {
2252             sr->query->which = Z_Query_type_1;
2253             sr->query->u.type_1 = rpnquery;
2254         }
2255         return apdu;
2256     }
2257     return apdu;
2258 }
2259
2260 Z_APDU *Yaz_Proxy::handle_target_charset_conversion(Z_APDU *apdu)
2261 {
2262     if (apdu->which == Z_APDU_searchRequest &&
2263         apdu->u.searchRequest->query)
2264     {
2265         if (apdu->u.searchRequest->query->which == Z_Query_type_1
2266             || apdu->u.searchRequest->query->which == Z_Query_type_101)
2267         {
2268             if (m_http_version)
2269                 m_charset_converter->set_client_query_charset("UTF-8");
2270             Z_RPNQuery *rpnquery = apdu->u.searchRequest->query->u.type_1;
2271             m_charset_converter->convert_type_1(rpnquery, odr_encode());
2272         }
2273     }
2274     return apdu;
2275 }
2276
2277
2278 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
2279 {
2280     if (apdu->which == Z_APDU_searchRequest)
2281     {
2282         Z_SearchRequest *sr = apdu->u.searchRequest;
2283         int err = 0;
2284         char *addinfo = 0;
2285
2286         Yaz_ProxyConfig *cfg = check_reconfigure();
2287         if (cfg)
2288             err = cfg->check_query(odr_encode(), m_default_target,
2289                                    sr->query, &addinfo);
2290         if (err)
2291         {
2292             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2293
2294             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2295             new_apdu->u.searchResponse->records =
2296                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2297             *new_apdu->u.searchResponse->searchStatus = 0;
2298
2299             send_to_client(new_apdu);
2300
2301             return 0;
2302         }
2303     }
2304     return apdu;
2305 }
2306
2307 int Yaz_Proxy::handle_authentication(Z_APDU *apdu)
2308 {
2309     if (apdu->which != Z_APDU_initRequest)
2310         return 1;  // pass if no init request
2311     Z_InitRequest *req = apdu->u.initRequest;
2312
2313     Yaz_ProxyConfig *cfg = check_reconfigure();
2314     if (!cfg)
2315         return 1;  // pass if no config
2316
2317     int ret;
2318     if (req->idAuthentication == 0)
2319     {
2320         ret = cfg->client_authentication(m_default_target, 0, 0, 0,
2321                                          m_peername);
2322     }
2323     else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2324     {
2325         ret = cfg->client_authentication(
2326             m_default_target,
2327             req->idAuthentication->u.idPass->userId,
2328             req->idAuthentication->u.idPass->groupId,
2329             req->idAuthentication->u.idPass->password,
2330             m_peername);
2331     }
2332     else if (req->idAuthentication->which == Z_IdAuthentication_open)
2333     {
2334         char user[64], pass[64];
2335         *user = '\0';
2336         *pass = '\0';
2337         sscanf(req->idAuthentication->u.open, "%63[^/]/%63s", user, pass);
2338         ret = cfg->client_authentication(m_default_target, user, 0, pass,
2339                                          m_peername);
2340     }
2341     else
2342         ret = cfg->client_authentication(m_default_target, 0, 0, 0,
2343                                          m_peername);
2344     return ret;
2345 }
2346
2347 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
2348 {
2349     m_marcxml_mode = none;
2350     if (apdu->which == Z_APDU_searchRequest)
2351     {
2352         Z_SearchRequest *sr = apdu->u.searchRequest;
2353         int err = 0;
2354         char *addinfo = 0;
2355         Yaz_ProxyConfig *cfg = check_reconfigure();
2356
2357         Z_RecordComposition rc_temp, *rc = 0;
2358         if (sr->smallSetElementSetNames)
2359         {
2360             rc_temp.which = Z_RecordComp_simple;
2361             rc_temp.u.simple = sr->smallSetElementSetNames;
2362             rc = &rc_temp;
2363         }
2364
2365         if (sr->preferredRecordSyntax)
2366         {
2367             struct oident *ent;
2368             ent = oid_getentbyoid(sr->preferredRecordSyntax);
2369             m_frontend_type = ent->value;
2370         }
2371         else
2372             m_frontend_type = VAL_NONE;
2373
2374         char *stylesheet_name = 0;
2375         if (cfg)
2376             err = cfg->check_syntax(odr_encode(),
2377                                     m_default_target,
2378                                     sr->preferredRecordSyntax, rc,
2379                                     &addinfo, &stylesheet_name, &m_schema,
2380                                     &m_backend_type, &m_backend_charset,
2381                                     &m_usemarcon_ini_stage1,
2382                                     &m_usemarcon_ini_stage2);
2383         if (stylesheet_name)
2384         {
2385             m_parent->low_socket_close();
2386
2387 #if HAVE_XSLT
2388             if (m_stylesheet_xsp)
2389                 xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
2390             m_stylesheet_xsp = xsltParseStylesheetFile((const xmlChar*)
2391                                                        stylesheet_name);
2392 #endif
2393             m_stylesheet_offset = 0;
2394             xfree(stylesheet_name);
2395
2396             m_parent->low_socket_open();
2397         }
2398         if (err == -1)
2399         {
2400             sr->smallSetElementSetNames = 0;
2401             sr->mediumSetElementSetNames = 0;
2402             m_marcxml_mode = marcxml;
2403             if (m_backend_type)
2404             {
2405
2406                 sr->preferredRecordSyntax =
2407                     yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN,
2408                                         m_backend_type);
2409             }
2410             else
2411                 sr->preferredRecordSyntax =
2412                     yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN,
2413                                            VAL_USMARC);
2414         }
2415         else if (err)
2416         {
2417             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2418
2419             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2420             new_apdu->u.searchResponse->records =
2421                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2422             *new_apdu->u.searchResponse->searchStatus = 0;
2423
2424             send_to_client(new_apdu);
2425
2426             return 0;
2427         }
2428         else if (m_backend_type)
2429         {
2430             sr->preferredRecordSyntax =
2431                 yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN, m_backend_type);
2432         }
2433     }
2434     else if (apdu->which == Z_APDU_presentRequest)
2435     {
2436         Z_PresentRequest *pr = apdu->u.presentRequest;
2437         int err = 0;
2438         char *addinfo = 0;
2439         Yaz_ProxyConfig *cfg = check_reconfigure();
2440
2441         if (pr->preferredRecordSyntax)
2442         {
2443             struct oident *ent;
2444             ent = oid_getentbyoid(pr->preferredRecordSyntax);
2445             m_frontend_type = ent->value;
2446         }
2447         else
2448             m_frontend_type = VAL_NONE;
2449
2450         char *stylesheet_name = 0;
2451         if (cfg)
2452             err = cfg->check_syntax(odr_encode(), m_default_target,
2453                                     pr->preferredRecordSyntax,
2454                                     pr->recordComposition,
2455                                     &addinfo, &stylesheet_name, &m_schema,
2456                                     &m_backend_type, &m_backend_charset,
2457                                     &m_usemarcon_ini_stage1,
2458                                     &m_usemarcon_ini_stage2
2459                                     );
2460         if (stylesheet_name)
2461         {
2462             m_parent->low_socket_close();
2463
2464 #if HAVE_XSLT
2465             if (m_stylesheet_xsp)
2466                 xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
2467             m_stylesheet_xsp = xsltParseStylesheetFile((const xmlChar*)
2468                                                        stylesheet_name);
2469 #endif
2470             m_stylesheet_offset = 0;
2471             xfree(stylesheet_name);
2472
2473             m_parent->low_socket_open();
2474         }
2475         if (err == -1)
2476         {
2477             pr->recordComposition = 0;
2478             m_marcxml_mode = marcxml;
2479             if (m_backend_type)
2480             {
2481
2482                 pr->preferredRecordSyntax =
2483                     yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN,
2484                                         m_backend_type);
2485             }
2486             else
2487                 pr->preferredRecordSyntax =
2488                     yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN,
2489                                            VAL_USMARC);
2490         }
2491         else if (err)
2492         {
2493             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
2494
2495             new_apdu->u.presentResponse->referenceId = pr->referenceId;
2496             new_apdu->u.presentResponse->records =
2497                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2498             *new_apdu->u.presentResponse->presentStatus =
2499                 Z_PresentStatus_failure;
2500
2501             send_to_client(new_apdu);
2502
2503             return 0;
2504         }
2505         else if (m_backend_type)
2506         {
2507             pr->preferredRecordSyntax =
2508                 yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN, m_backend_type);
2509         }
2510     }
2511     return apdu;
2512 }
2513
2514 Z_ElementSetNames *Yaz_Proxy::mk_esn_from_schema(ODR o, const char *schema)
2515 {
2516     if (!schema)
2517         return 0;
2518     Z_ElementSetNames *esn = (Z_ElementSetNames *)
2519         odr_malloc(o, sizeof(Z_ElementSetNames));
2520     esn->which = Z_ElementSetNames_generic;
2521     esn->u.generic = odr_strdup(o, schema);
2522     return esn;
2523 }
2524
2525 void Yaz_Proxy::srw_get_client(const char *db, const char **backend_db)
2526 {
2527     const char *t = 0;
2528     Yaz_ProxyConfig *cfg = check_reconfigure();
2529     if (cfg)
2530         t = cfg->get_explain_name(db, backend_db);
2531
2532     if (m_client && m_default_target && t && strcmp(m_default_target, t))
2533     {
2534         releaseClient();
2535     }
2536
2537     if (t)
2538     {
2539         xfree(m_default_target);
2540         m_default_target = xstrdup(t);
2541     }
2542 }
2543
2544 int Yaz_Proxy::file_access(Z_HTTP_Request *hreq)
2545 {
2546     struct stat sbuf;
2547     if (strcmp(hreq->method, "GET"))
2548         return 0;
2549     if (hreq->path[0] != '/')
2550         return 0;
2551     const char *cp = hreq->path;
2552     while (*cp)
2553     {
2554         if (*cp == '/' && strchr("/.", cp[1]))
2555             return 0;
2556         cp++;
2557     }
2558
2559     Yaz_ProxyConfig *cfg = check_reconfigure();
2560
2561     if (!cfg->get_file_access_info(hreq->path+1))
2562         return 0;
2563
2564     const char *fname = hreq->path+1;
2565     if (stat(fname, &sbuf))
2566     {
2567         yaz_log(YLOG_LOG|YLOG_ERRNO, "%sstat failed for %s", m_session_str,
2568                 fname);
2569         return 0;
2570     }
2571     if ((sbuf.st_mode & S_IFMT) != S_IFREG)
2572     {
2573         yaz_log(YLOG_LOG, "%sNot a regular file %s", m_session_str, fname);
2574         return 0;
2575     }
2576     if (sbuf.st_size > (off_t) 1000000)
2577     {
2578         yaz_log(YLOG_WARN, "%sFile %s too large for transfer", m_session_str,
2579                 fname);
2580         return 0;
2581     }
2582
2583     ODR o = odr_encode();
2584
2585     const char *ctype = cfg->check_mime_type(fname);
2586     Z_GDU *gdu = z_get_HTTP_Response(o, 200);
2587     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
2588     if (m_http_version)
2589         hres->version = odr_strdup(o, m_http_version);
2590     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
2591     if (m_http_keepalive)
2592         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
2593     else
2594         timeout(0);
2595
2596     hres->content_len = sbuf.st_size;
2597     hres->content_buf = (char*) odr_malloc(o, hres->content_len);
2598     FILE *f = fopen(fname, "rb");
2599     if (f)
2600     {
2601         fread(hres->content_buf, 1, hres->content_len, f);
2602         fclose(f);
2603     }
2604     else
2605     {
2606         return 0;
2607     }
2608     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
2609     {
2610         yaz_log (YLOG_LOG, "%sSending file %s to client", m_session_str,
2611                  fname);
2612     }
2613     int len;
2614     send_GDU(gdu, &len);
2615     recv_GDU_more(true);
2616     return 1;
2617 }
2618
2619 void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
2620 {
2621     if (m_s2z_odr_init)
2622     {
2623         odr_destroy(m_s2z_odr_init);
2624         m_s2z_odr_init = 0;
2625     }
2626     if (m_s2z_odr_search)
2627     {
2628         odr_destroy(m_s2z_odr_search);
2629         m_s2z_odr_search = 0;
2630     }
2631
2632     m_http_keepalive = 0;
2633     m_http_version = 0;
2634     if (!strcmp(hreq->version, "1.0"))
2635     {
2636         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
2637         if (v && !strcmp(v, "Keep-Alive"))
2638             m_http_keepalive = 1;
2639         else
2640             m_http_keepalive = 0;
2641         m_http_version = "1.0";
2642     }
2643     else
2644     {
2645         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
2646         if (v && !strcmp(v, "close"))
2647             m_http_keepalive = 0;
2648         else
2649             m_http_keepalive = 1;
2650         m_http_version = "1.1";
2651     }
2652
2653     const char *a = z_HTTP_header_lookup(hreq->headers, "Authorization");
2654     char authorization_str[255];
2655     *authorization_str = '\0';
2656     if (a && strncasecmp(a, "Basic ", 6) == 0)
2657         base64_decode(a + 6, authorization_str, 254);
2658
2659     Z_SRW_PDU *srw_pdu = 0;
2660     Z_SOAP *soap_package = 0;
2661     char *charset = 0;
2662     Z_SRW_diagnostic *diagnostic = 0;
2663     int num_diagnostic = 0;
2664
2665     yaz_log(YLOG_LOG, "%s%s %s", m_session_str, hreq->method, hreq->path);
2666
2667     if (file_access(hreq))
2668     {
2669         return;
2670     }
2671     else if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
2672                             &charset) == 0
2673              || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
2674                                &charset, &diagnostic, &num_diagnostic) == 0)
2675     {
2676         m_s2z_odr_init = odr_createmem(ODR_ENCODE);
2677         m_s2z_odr_search = odr_createmem(ODR_ENCODE);
2678         m_soap_ns = odr_strdup(m_s2z_odr_search, soap_package->ns);
2679         m_s2z_init_apdu = 0;
2680         m_s2z_search_apdu = 0;
2681         m_s2z_present_apdu = 0;
2682
2683         m_s2z_stylesheet = 0;
2684
2685         Z_IdAuthentication *auth = NULL;
2686         if (*authorization_str)
2687         {
2688             auth = (Z_IdAuthentication *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdAuthentication));
2689             auth->which = Z_IdAuthentication_idPass;
2690             auth->u.idPass = (Z_IdPass *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdPass));
2691             auth->u.idPass->groupId = NULL;
2692             char *p = strchr(authorization_str, ':');
2693             if (p)
2694             {
2695                 *p = '\0';
2696                 p++;
2697                 auth->u.idPass->password = odr_strdup(m_s2z_odr_init, p);
2698             }
2699             auth->u.idPass->userId = odr_strdup(m_s2z_odr_init, authorization_str);
2700         }
2701
2702         if (srw_pdu->which == Z_SRW_searchRetrieve_request)
2703         {
2704
2705             Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
2706
2707             const char *backend_db = srw_req->database;
2708             srw_get_client(srw_req->database, &backend_db);
2709
2710             m_s2z_database = odr_strdup(m_s2z_odr_init, srw_req->database);
2711             // recordXPath unsupported.
2712             if (srw_req->recordXPath)
2713             {
2714                 yaz_add_srw_diagnostic(odr_decode(),
2715                                        &diagnostic, &num_diagnostic,
2716                                        72, 0);
2717             }
2718             // sort unsupported
2719             if (srw_req->sort_type != Z_SRW_sort_type_none)
2720             {
2721                 yaz_add_srw_diagnostic(odr_decode(),
2722                                        &diagnostic, &num_diagnostic,
2723                                        80, 0);
2724             }
2725             // save stylesheet
2726             if (srw_req->stylesheet)
2727                 m_s2z_stylesheet =
2728                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
2729
2730             // set packing for response records ..
2731             if (srw_req->recordPacking &&
2732                 !strcmp(srw_req->recordPacking, "xml"))
2733                 m_s2z_packing = Z_SRW_recordPacking_XML;
2734             else
2735                 m_s2z_packing = Z_SRW_recordPacking_string;
2736
2737             if (num_diagnostic)
2738             {
2739                 Z_SRW_PDU *srw_pdu =
2740                     yaz_srw_get(odr_encode(),
2741                                 Z_SRW_searchRetrieve_response);
2742                 Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
2743
2744                 srw_res->diagnostics = diagnostic;
2745                 srw_res->num_diagnostics = num_diagnostic;
2746                 send_srw_response(srw_pdu);
2747                 return;
2748             }
2749
2750             // prepare search PDU
2751             m_s2z_search_apdu = zget_APDU(m_s2z_odr_search,
2752                                           Z_APDU_searchRequest);
2753             Z_SearchRequest *z_searchRequest =
2754                 m_s2z_search_apdu->u.searchRequest;
2755
2756             z_searchRequest->num_databaseNames = 1;
2757             z_searchRequest->databaseNames = (char**)
2758                 odr_malloc(m_s2z_odr_search, sizeof(char *));
2759             z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
2760                                                            backend_db);
2761
2762             // query transformation
2763             Z_Query *query = (Z_Query *)
2764                 odr_malloc(m_s2z_odr_search, sizeof(Z_Query));
2765             z_searchRequest->query = query;
2766
2767             if (srw_req->query_type == Z_SRW_query_type_cql)
2768             {
2769                 Z_External *ext = (Z_External *)
2770                     odr_malloc(m_s2z_odr_search, sizeof(*ext));
2771                 ext->direct_reference =
2772                     odr_getoidbystr(m_s2z_odr_search, "1.2.840.10003.16.2");
2773                 ext->indirect_reference = 0;
2774                 ext->descriptor = 0;
2775                 ext->which = Z_External_CQL;
2776                 ext->u.cql = srw_req->query.cql;
2777
2778                 query->which = Z_Query_type_104;
2779                 query->u.type_104 =  ext;
2780             }
2781             else if (srw_req->query_type == Z_SRW_query_type_pqf)
2782             {
2783                 Z_RPNQuery *RPNquery;
2784                 YAZ_PQF_Parser pqf_parser;
2785
2786                 pqf_parser = yaz_pqf_create ();
2787
2788                 RPNquery = yaz_pqf_parse (pqf_parser, m_s2z_odr_search,
2789                                           srw_req->query.pqf);
2790                 if (!RPNquery)
2791                 {
2792                     const char *pqf_msg;
2793                     size_t off;
2794                     int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
2795                     int ioff = off;
2796                     yaz_log(YLOG_LOG, "%*s^\n", ioff+4, "");
2797                     yaz_log(YLOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
2798
2799                     send_to_srw_client_error(10, 0);
2800                     return;
2801                 }
2802                 query->which = Z_Query_type_1;
2803                 query->u.type_1 =  RPNquery;
2804
2805                 yaz_pqf_destroy (pqf_parser);
2806             }
2807             else
2808             {
2809                 send_to_srw_client_error(7, "query");
2810                 return;
2811             }
2812
2813             // present
2814             m_s2z_present_apdu = 0;
2815             int max = 0;
2816             if (srw_req->maximumRecords)
2817                 max = *srw_req->maximumRecords;
2818             int start = 1;
2819             if (srw_req->startRecord)
2820                 start = *srw_req->startRecord;
2821             if (max > 0)
2822             {
2823                 // Some backend, such as Voyager doesn't honor piggyback
2824                 // So we use present always (0 &&).
2825                 if (0 && start <= 1)  // Z39.50 piggyback
2826                 {
2827                     *z_searchRequest->smallSetUpperBound = max;
2828                     *z_searchRequest->mediumSetPresentNumber = max;
2829                     *z_searchRequest->largeSetLowerBound = 2000000000; // 2e9
2830
2831                     z_searchRequest->preferredRecordSyntax =
2832                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
2833                                                VAL_TEXT_XML);
2834                     if (srw_req->recordSchema)
2835                     {
2836                         z_searchRequest->smallSetElementSetNames =
2837                             z_searchRequest->mediumSetElementSetNames =
2838                             mk_esn_from_schema(m_s2z_odr_search,
2839                                                srw_req->recordSchema);
2840                     }
2841                 }
2842                 else   // Z39.50 present
2843                 {
2844                     m_s2z_present_apdu = zget_APDU(m_s2z_odr_search,
2845                                                    Z_APDU_presentRequest);
2846                     Z_PresentRequest *z_presentRequest =
2847                         m_s2z_present_apdu->u.presentRequest;
2848                     *z_presentRequest->resultSetStartPoint = start;
2849                     *z_presentRequest->numberOfRecordsRequested = max;
2850                     z_presentRequest->preferredRecordSyntax =
2851                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
2852                                                VAL_TEXT_XML);
2853                     if (srw_req->recordSchema)
2854                     {
2855                         z_presentRequest->recordComposition =
2856                             (Z_RecordComposition *)
2857                             odr_malloc(m_s2z_odr_search,
2858                                        sizeof(Z_RecordComposition));
2859                         z_presentRequest->recordComposition->which =
2860                             Z_RecordComp_simple;
2861                         z_presentRequest->recordComposition->u.simple =
2862                             mk_esn_from_schema(m_s2z_odr_search,
2863                                                srw_req->recordSchema);
2864                     }
2865                 }
2866             }
2867             if (!m_client)
2868             {
2869                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
2870                                             Z_APDU_initRequest);
2871
2872                 m_s2z_init_apdu->u.initRequest->idAuthentication = auth;
2873
2874                 // prevent m_initRequest_apdu memory from being grabbed
2875                 // in Yaz_Proxy::handle_incoming_Z_PDU
2876                 m_initRequest_apdu = m_s2z_init_apdu;
2877                 handle_incoming_Z_PDU(m_s2z_init_apdu);
2878                 return;
2879             }
2880             else
2881             {
2882                 handle_incoming_Z_PDU(m_s2z_search_apdu);
2883                 return;
2884             }
2885         }
2886         else if (srw_pdu->which == Z_SRW_explain_request)
2887         {
2888             Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
2889
2890             const char *backend_db = srw_req->database;
2891             srw_get_client(srw_req->database, &backend_db);
2892
2893             m_s2z_database = odr_strdup(m_s2z_odr_init, srw_req->database);
2894
2895             // save stylesheet
2896             if (srw_req->stylesheet)
2897                 m_s2z_stylesheet =
2898                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
2899
2900             if (srw_req->recordPacking &&
2901                 !strcmp(srw_req->recordPacking, "xml"))
2902                 m_s2z_packing = Z_SRW_recordPacking_XML;
2903             else
2904                 m_s2z_packing = Z_SRW_recordPacking_string;
2905
2906             if (num_diagnostic)
2907             {
2908                 send_srw_explain_response(diagnostic, num_diagnostic);
2909                 return;
2910             }
2911
2912             if (!m_client)
2913             {
2914                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
2915                                             Z_APDU_initRequest);
2916
2917                 m_s2z_init_apdu->u.initRequest->idAuthentication = auth;
2918
2919                 // prevent m_initRequest_apdu memory from being grabbed
2920                 // in Yaz_Proxy::handle_incoming_Z_PDU
2921                 m_initRequest_apdu = m_s2z_init_apdu;
2922                 handle_incoming_Z_PDU(m_s2z_init_apdu);
2923             }
2924             else
2925                 send_srw_explain_response(0, 0);
2926             return;
2927         }
2928         else if (srw_pdu->which == Z_SRW_scan_request)
2929         {
2930             m_s2z_database = odr_strdup(m_s2z_odr_init,
2931                                         srw_pdu->u.scan_request->database);
2932
2933             yaz_add_srw_diagnostic(odr_decode(),
2934                                    &diagnostic, &num_diagnostic,
2935                                    4, "scan");
2936             Z_SRW_PDU *srw_pdu =
2937                 yaz_srw_get(odr_encode(),
2938                             Z_SRW_scan_response);
2939             Z_SRW_scanResponse *srw_res = srw_pdu->u.scan_response;
2940
2941             srw_res->diagnostics = diagnostic;
2942             srw_res->num_diagnostics = num_diagnostic;
2943             send_srw_response(srw_pdu);
2944             return;
2945         }
2946         else
2947         {
2948             m_s2z_database = 0;
2949
2950             send_to_srw_client_error(4, 0);
2951         }
2952     }
2953     send_http_response(400);
2954 }
2955
2956 void Yaz_Proxy::handle_init(Z_APDU *apdu)
2957 {
2958
2959     Z_OtherInformation **oi;
2960     get_otherInfoAPDU(apdu, &oi);
2961
2962     if (apdu->u.initRequest->implementationId)
2963         yaz_log(YLOG_LOG, "%simplementationId: %s",
2964                 m_session_str, apdu->u.initRequest->implementationId);
2965     if (apdu->u.initRequest->implementationName)
2966         yaz_log(YLOG_LOG, "%simplementationName: %s",
2967                 m_session_str, apdu->u.initRequest->implementationName);
2968     if (apdu->u.initRequest->implementationVersion)
2969         yaz_log(YLOG_LOG, "%simplementationVersion: %s",
2970                 m_session_str, apdu->u.initRequest->implementationVersion);
2971     if (m_initRequest_apdu == 0)
2972     {
2973         if (m_initRequest_mem)
2974             nmem_destroy(m_initRequest_mem);
2975
2976         m_initRequest_apdu = apdu;
2977         m_initRequest_mem = odr_extract_mem(odr_decode());
2978
2979         m_initRequest_preferredMessageSize = *apdu->u.initRequest->
2980             preferredMessageSize;
2981         *apdu->u.initRequest->preferredMessageSize = 1024*1024;
2982         m_initRequest_maximumRecordSize = *apdu->u.initRequest->
2983             maximumRecordSize;
2984         *apdu->u.initRequest->maximumRecordSize = 1024*1024;
2985
2986         Z_CharSetandLanguageNegotiation *charSetandLangRecord =
2987             yaz_get_charneg_record(*oi);
2988
2989         // Save proposal charsets and langs.
2990         if (ODR_MASK_GET(apdu->u.initRequest->options,
2991                          Z_Options_negotiationModel)
2992             && charSetandLangRecord)
2993         {
2994
2995             yaz_get_proposal_charneg(m_referenceId_mem,
2996                                      charSetandLangRecord,
2997                                      &m_initRequest_oi_negotiation_charsets,
2998                                      &m_initRequest_oi_negotiation_num_charsets,
2999                                      &m_initRequest_oi_negotiation_langs,
3000                                      &m_initRequest_oi_negotiation_num_langs,
3001                                      &m_initRequest_oi_negotiation_selected);
3002
3003             for (int i = 0; i<m_initRequest_oi_negotiation_num_charsets; i++)
3004             {
3005                 yaz_log(YLOG_LOG, "%scharacters set proposal: %s",
3006                         m_session_str,(m_initRequest_oi_negotiation_charsets[i])?
3007                         m_initRequest_oi_negotiation_charsets[i]:"none");
3008             }
3009             for (int i=0; i<m_initRequest_oi_negotiation_num_langs; i++)
3010             {
3011                 yaz_log(YLOG_LOG, "%slanguages proposal: %s",
3012                         m_session_str, (m_initRequest_oi_negotiation_langs[i])?
3013                         m_initRequest_oi_negotiation_langs[i]:"none");
3014             }
3015             yaz_log(YLOG_LOG, "%sselected proposal: %d (boolean)",
3016                     m_session_str, m_initRequest_oi_negotiation_selected);
3017         }
3018         // save init options for the response..
3019         m_initRequest_options = apdu->u.initRequest->options;
3020
3021         apdu->u.initRequest->options =
3022             (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
3023                                        sizeof(Odr_bitmask));
3024         ODR_MASK_ZERO(apdu->u.initRequest->options);
3025         int i;
3026         for (i = 0; i<= 24; i++)
3027             ODR_MASK_SET(apdu->u.initRequest->options, i);
3028         // check negotiation option
3029         if (!ODR_MASK_GET(m_initRequest_options,
3030                           Z_Options_negotiationModel))
3031         {
3032             ODR_MASK_CLEAR(apdu->u.initRequest->options,
3033                            Z_Options_negotiationModel);
3034         }
3035         ODR_MASK_CLEAR(apdu->u.initRequest->options,
3036                        Z_Options_concurrentOperations);
3037         // make new version
3038         m_initRequest_version = apdu->u.initRequest->protocolVersion;
3039         apdu->u.initRequest->protocolVersion =
3040             (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
3041                                        sizeof(Odr_bitmask));
3042         ODR_MASK_ZERO(apdu->u.initRequest->protocolVersion);
3043
3044         for (i = 0; i<= 8; i++)
3045             ODR_MASK_SET(apdu->u.initRequest->protocolVersion, i);
3046     }
3047     handle_charset_lang_negotiation(apdu);
3048     if (m_client->m_init_flag)
3049     {
3050         if (handle_init_response_for_invalid_session(apdu))
3051             return;
3052         if (m_client->m_initResponse)
3053         {
3054             Z_APDU *apdu2 = m_client->m_initResponse;
3055             apdu2->u.initResponse->otherInfo = 0;
3056             if (m_client->m_cookie && *m_client->m_cookie)
3057                 set_otherInformationString(apdu2, VAL_COOKIE, 1,
3058                                            m_client->m_cookie);
3059             apdu2->u.initResponse->referenceId =
3060                 apdu->u.initRequest->referenceId;
3061             apdu2->u.initResponse->options = m_client->m_initResponse_options;
3062             apdu2->u.initResponse->protocolVersion =
3063                 m_client->m_initResponse_version;
3064
3065             handle_charset_lang_negotiation(apdu2);
3066
3067             send_to_client(apdu2);
3068             m_timeout_mode = timeout_normal;
3069             return;
3070         }
3071     }
3072     m_client->m_init_flag = 1;
3073
3074 #if USE_AUTH_MSG
3075     Auth_Msg *m = new Auth_Msg;
3076     m->m_proxy = this;
3077     z_APDU(odr_encode(), &apdu, 0, "encode");
3078     char *apdu_buf = odr_getbuf(odr_encode(), &m->m_apdu_len, 0);
3079     m->m_apdu_buf = (char*) nmem_malloc(m->m_nmem, m->m_apdu_len);
3080     memcpy(m->m_apdu_buf, apdu_buf, m->m_apdu_len);
3081     odr_reset(odr_encode());
3082
3083     inc_ref();
3084     m_my_thread->put(m);
3085 #else
3086     int ret = handle_authentication(apdu);
3087     result_authentication(apdu, ret);
3088 #endif
3089 }
3090
3091 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
3092 {
3093 #if 0
3094     // try to make a _bad_ attribute set ID .. Don't enable this in prod.
3095     if (apdu->which == Z_APDU_searchRequest)
3096     {
3097         Z_SearchRequest *req = apdu->u.searchRequest;
3098         if (req->query && req->query->which == Z_Query_type_1)
3099         {
3100             Z_RPNQuery *rpnquery = req->query->u.type_1;
3101             if (rpnquery->attributeSetId)
3102             {
3103                 rpnquery->attributeSetId[0] = -2;
3104                 rpnquery->attributeSetId[1] = -1;
3105                 yaz_log(YLOG_WARN, "%sBAD FIXUP TEST", m_session_str);
3106             }
3107         }
3108     }
3109 #endif
3110     Z_ReferenceId **refid = get_referenceIdP(apdu);
3111     nmem_reset(m_referenceId_mem);
3112     if (refid && *refid)
3113     {
3114         m_referenceId = (Z_ReferenceId *)
3115             nmem_malloc(m_referenceId_mem, sizeof(*m_referenceId));
3116         m_referenceId->len = m_referenceId->size = (*refid)->len;
3117         m_referenceId->buf = (unsigned char *)
3118             nmem_malloc(m_referenceId_mem, (*refid)->len);
3119         memcpy(m_referenceId->buf, (*refid)->buf, (*refid)->len);
3120     }
3121     else
3122         m_referenceId = 0;
3123
3124     if (!m_client && m_flag_invalid_session)
3125     {
3126         // Got request for a session that is invalid..
3127         m_apdu_invalid_session = apdu; // save package
3128         m_mem_invalid_session = odr_extract_mem(odr_decode());
3129         apdu = m_initRequest_apdu;     // but throw an init to the target
3130     }
3131
3132     if (apdu->which == Z_APDU_searchRequest)
3133         m_search_stat.add_bytes(1);
3134
3135     // Determine our client.
3136     Z_OtherInformation **oi;
3137     get_otherInfoAPDU(apdu, &oi);
3138     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi));
3139     if (!m_client)
3140     {
3141         if (m_http_version)
3142         {   // HTTP. Send not found
3143             send_http_response(404);
3144             return;
3145         }
3146         else
3147         {
3148             // Z39.50 just shutdown
3149             timeout(0);
3150             return;
3151         }
3152     }
3153
3154     m_client->m_server = this;
3155
3156     if (apdu->which == Z_APDU_initRequest)
3157         handle_init(apdu);
3158     else
3159         handle_incoming_Z_PDU_2(apdu);
3160 }
3161
3162 void Yaz_Proxy::handle_incoming_Z_PDU_2(Z_APDU *apdu)
3163 {
3164     handle_max_record_retrieve(apdu);
3165
3166     if (apdu)
3167         apdu = handle_syntax_validation(apdu);
3168
3169     if (apdu)
3170         apdu = handle_query_transformation(apdu);
3171
3172     if (apdu)
3173         apdu = handle_target_charset_conversion(apdu);
3174
3175     if (apdu)
3176         apdu = handle_query_validation(apdu);
3177
3178     if (apdu)
3179         apdu = result_set_optimize(apdu);
3180
3181     if (!apdu)
3182     {
3183         m_client->timeout(m_target_idletime);  // mark it active even
3184         recv_GDU_more(true);
3185         // though we didn't use it
3186         return;
3187     }
3188
3189     // delete other info construct completely if 0 elements
3190     Z_OtherInformation **oi;
3191     get_otherInfoAPDU(apdu, &oi);
3192     if (oi && *oi && (*oi)->num_elements == 0)
3193         *oi = 0;
3194
3195     if (apdu->which == Z_APDU_presentRequest &&
3196         m_client->m_resultSetStartPoint == 0)
3197     {
3198         Z_PresentRequest *pr = apdu->u.presentRequest;
3199         m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
3200         m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
3201     } else {
3202         m_client->m_resultSetStartPoint = 0;
3203     }
3204     if (m_client->send_to_target(apdu) < 0)
3205     {
3206         m_client->shutdown();
3207     }
3208     else
3209         m_client->m_waiting = 1;
3210 }
3211
3212 void Yaz_Proxy::connectNotify()
3213 {
3214 }
3215
3216 void Yaz_Proxy::releaseClient()
3217 {
3218     xfree(m_proxyTarget);
3219     m_proxyTarget = 0;
3220     m_flag_invalid_session = 0;
3221     // only keep if keep_alive flag is set...
3222     if (m_client &&
3223         m_client->m_pdu_recv < m_keepalive_limit_pdu &&
3224         m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
3225         m_client->m_waiting == 0)
3226     {
3227         yaz_log(YLOG_LOG, "%sShutdown (client to proxy) keepalive %s",
3228                  m_session_str,
3229                  m_client->get_hostname());
3230         yaz_log(YLOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
3231                 m_session_str, m_client->m_pdu_recv,
3232                 m_client->m_bytes_sent + m_client->m_bytes_recv,
3233                 m_keepalive_limit_bw, m_keepalive_limit_pdu);
3234         assert (m_client->m_waiting != 2);
3235         // Tell client (if any) that no server connection is there..
3236         m_client->m_server = 0;
3237         m_client = 0;
3238     }
3239     else if (m_client)
3240     {
3241         yaz_log (YLOG_LOG, "%sShutdown (client to proxy) close %s",
3242                  m_session_str,
3243                  m_client->get_hostname());
3244         assert (m_client->m_waiting != 2);
3245         delete m_client;
3246         m_client = 0;
3247     }
3248     else if (!m_parent)
3249     {
3250         yaz_log (YLOG_LOG, "%sshutdown (client to proxy) bad state",
3251                  m_session_str);
3252         assert (m_parent);
3253     }
3254     else
3255     {
3256         yaz_log (YLOG_LOG, "%sShutdown (client to proxy)",
3257                  m_session_str);
3258     }
3259     if (m_parent)
3260         m_parent->pre_init();
3261 }
3262
3263 bool Yaz_Proxy::dec_ref(bool main_ptr)
3264 {
3265     main_ptr = false;
3266     assert(m_ref_count > 0);
3267     if (main_ptr)
3268     {
3269         if (m_main_ptr_dec)
3270             return false;
3271         m_main_ptr_dec = true;
3272     }
3273
3274     m_http_keepalive = 0;
3275
3276     --m_ref_count;
3277     if (m_ref_count > 0)
3278         return false;
3279
3280     releaseClient();
3281
3282     delete this;
3283     return true;
3284 }
3285
3286 const char *Yaz_ProxyClient::get_session_str()
3287 {
3288     if (!m_server)
3289         return "0 ";
3290     return m_server->get_session_str();
3291 }
3292
3293 void Yaz_ProxyClient::shutdown()
3294 {
3295     yaz_log (YLOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
3296              get_hostname());
3297
3298     if (m_server)
3299     {
3300         m_waiting = 1;   // ensure it's released from Yaz_Proxy::releaseClient
3301         m_server->dec_ref(true);
3302     }
3303     else
3304         delete this;
3305 }
3306
3307 void Yaz_Proxy::failNotify()
3308 {
3309     inc_request_no();
3310     yaz_log (YLOG_LOG, "%sConnection closed by client", get_session_str());
3311     dec_ref(true);
3312 }
3313
3314 void Yaz_Proxy::send_response_fail_client(const char *addr)
3315 {
3316     if (m_http_version)
3317     {
3318         Z_SRW_diagnostic *diagnostic = 0;
3319         int num_diagnostic = 0;
3320
3321         yaz_add_srw_diagnostic(odr_encode(),
3322                                &diagnostic, &num_diagnostic,
3323                                YAZ_SRW_SYSTEM_TEMPORARILY_UNAVAILABLE, addr);
3324         if (m_s2z_search_apdu)
3325             send_srw_search_response(diagnostic, num_diagnostic);
3326         else
3327             send_srw_explain_response(diagnostic, num_diagnostic);
3328     }
3329 }
3330 void Yaz_ProxyClient::failNotify()
3331 {
3332     if (m_server)
3333         m_server->inc_request_no();
3334     yaz_log (YLOG_LOG, "%sConnection closed by target %s",
3335              get_session_str(), get_hostname());
3336
3337     if (m_server)
3338         m_server->send_response_fail_client(get_hostname());
3339     shutdown();
3340 }
3341
3342 void Yaz_ProxyClient::connectNotify()
3343 {
3344     const char *s = get_session_str();
3345     const char *h = get_hostname();
3346     yaz_log (YLOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
3347              m_target_idletime);
3348     timeout(m_target_idletime);
3349     if (!m_server)
3350         pre_init_client();
3351 }
3352
3353 IPDU_Observer *Yaz_ProxyClient::sessionNotify(IPDU_Observable
3354                                               *the_PDU_Observable, int fd)
3355 {
3356     return new Yaz_ProxyClient(the_PDU_Observable, 0);
3357 }
3358
3359 Yaz_ProxyClient::~Yaz_ProxyClient()
3360 {
3361     if (m_prev)
3362         *m_prev = m_next;
3363     if (m_next)
3364         m_next->m_prev = m_prev;
3365     m_waiting = 2;     // for debugging purposes only.
3366     odr_destroy(m_init_odr);
3367     odr_destroy(m_idAuthentication_odr);
3368     delete m_last_query;
3369     xfree (m_last_resultSetId);
3370     xfree (m_cookie);
3371 }
3372
3373 void Yaz_ProxyClient::pre_init_client()
3374 {
3375     Z_APDU *apdu = create_Z_PDU(Z_APDU_initRequest);
3376     Z_InitRequest *req = apdu->u.initRequest;
3377
3378     int i;
3379     for (i = 0; i<= 24; i++)
3380         ODR_MASK_SET(req->options, i);
3381     ODR_MASK_CLEAR(apdu->u.initRequest->options,
3382                    Z_Options_negotiationModel);
3383     ODR_MASK_CLEAR(apdu->u.initRequest->options,
3384                    Z_Options_concurrentOperations);
3385     for (i = 0; i<= 10; i++)
3386         ODR_MASK_SET(req->protocolVersion, i);
3387
3388     if (send_to_target(apdu) < 0)
3389     {
3390         delete this;
3391     }
3392     else
3393     {
3394         m_waiting = 1;
3395         m_init_flag = 1;
3396     }
3397 }
3398
3399 void Yaz_Proxy::pre_init()
3400 {
3401     int i;
3402     const char *name = 0;
3403     const char *zurl_in_use[MAX_ZURL_PLEX];
3404     int limit_bw, limit_pdu, limit_req, limit_search;
3405     int target_idletime, client_idletime;
3406     int max_clients;
3407     int keepalive_limit_bw, keepalive_limit_pdu;
3408     int pre_init;
3409     const char *cql2rpn = 0;
3410     const char *authentication = 0;
3411     const char *negotiation_charset = 0;
3412     const char *negotiation_lang = 0;
3413
3414     Yaz_ProxyConfig *cfg = check_reconfigure();
3415
3416     zurl_in_use[0] = 0;
3417
3418     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
3419         set_APDU_yazlog(1);
3420     else
3421         set_APDU_yazlog(0);
3422
3423     for (i = 0; cfg && cfg->get_target_no(i, &name, zurl_in_use,
3424                                           &limit_bw, &limit_pdu, &limit_req,
3425                                           &limit_search,
3426                                           &target_idletime, &client_idletime,
3427                                           &max_clients,
3428                                           &keepalive_limit_bw,
3429                                           &keepalive_limit_pdu,
3430                                           &pre_init,
3431                                           &cql2rpn,
3432                                           &authentication,
3433                                           &negotiation_charset,
3434                                           &negotiation_lang,
3435                                           0,
3436                                           0) ; i++)
3437     {
3438         if (pre_init)
3439         {
3440             int j;
3441             for (j = 0; zurl_in_use[j]; j++)
3442             {
3443                 Yaz_ProxyClient *c;
3444                 int spare = 0;
3445                 int spare_waiting = 0;
3446                 int in_use = 0;
3447                 int other = 0;
3448                 for (c = m_clientPool; c; c = c->m_next)
3449                 {
3450                     if (!strcmp(zurl_in_use[j], c->get_hostname()))
3451                     {
3452                         if (c->m_cookie == 0)
3453                         {
3454                             if (c->m_server == 0)
3455                                 if (c->m_waiting)
3456                                     spare_waiting++;
3457                                 else
3458                                     spare++;
3459                             else
3460                                 in_use++;
3461                         }
3462                         else
3463                             other++;
3464                     }
3465                 }
3466                 yaz_log(YLOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
3467                         "sparew=%d preinit=%d",m_session_str,
3468                         name, zurl_in_use[j], in_use, other,
3469                         spare, spare_waiting, pre_init);
3470                 if (spare + spare_waiting < pre_init)
3471                 {
3472                     c = new Yaz_ProxyClient(m_PDU_Observable->clone(), this);
3473                     c->m_next = m_clientPool;
3474                     if (c->m_next)
3475                         c->m_next->m_prev = &c->m_next;
3476                     m_clientPool = c;
3477                     c->m_prev = &m_clientPool;
3478
3479                     if (m_log_mask & PROXY_LOG_APDU_SERVER)
3480                         c->set_APDU_yazlog(1);
3481                     else
3482                         c->set_APDU_yazlog(0);
3483
3484                     if (c->client(zurl_in_use[j]))
3485                     {
3486                         timeout(60);
3487                         delete c;
3488                         return;
3489                     }
3490                     c->timeout(30);
3491                     c->m_waiting = 1;
3492                     c->m_target_idletime = target_idletime;
3493                     c->m_seqno = m_seqno++;
3494                 }
3495             }
3496         }
3497     }
3498 }
3499
3500 void Yaz_Proxy::timeoutNotify()
3501 {
3502     if (m_parent)
3503     {
3504         GDU *gdu;
3505         switch(m_timeout_mode)
3506         {
3507         case timeout_normal:
3508         case timeout_busy:
3509             inc_request_no();
3510             m_in_queue.clear();
3511             yaz_log (YLOG_LOG, "%sTimeout (client to proxy)", m_session_str);
3512             dec_ref(true);
3513             break;
3514         case timeout_reduce:
3515             timeout(m_client_idletime);
3516             m_timeout_mode = timeout_busy;
3517             gdu = m_timeout_gdu;
3518             m_timeout_gdu = 0;
3519             recv_GDU_normal(gdu);
3520             break;
3521         case timeout_xsl:
3522             assert(m_stylesheet_nprl);
3523             convert_xsl_delay();
3524             recv_GDU_more(true);
3525         }
3526     }
3527     else
3528     {
3529         timeout(600);
3530         pre_init();
3531     }
3532 }
3533
3534 void Yaz_Proxy::markInvalid()
3535 {
3536     m_client = 0;
3537     m_flag_invalid_session = 1;
3538 }
3539
3540 void Yaz_ProxyClient::timeoutNotify()
3541 {
3542     if (m_server)
3543         m_server->inc_request_no();
3544
3545     yaz_log (YLOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
3546              get_hostname());
3547
3548     if (m_server)
3549         m_server->send_response_fail_client(get_hostname());
3550
3551     Yaz_Proxy *proxy_root = m_root;
3552
3553     shutdown();
3554
3555     proxy_root->pre_init();
3556 }
3557
3558 Yaz_ProxyClient::Yaz_ProxyClient(IPDU_Observable *the_PDU_Observable,
3559                                  Yaz_Proxy *parent) :
3560     Z_Assoc (the_PDU_Observable)
3561 {
3562     m_cookie = 0;
3563     m_next = 0;
3564     m_prev = 0;
3565     m_init_flag = 0;
3566     m_last_query = 0;
3567     m_last_resultSetId = 0;
3568     m_last_resultCount = 0;
3569     m_last_ok = 0;
3570     m_sr_transform = 0;
3571     m_waiting = 0;
3572     m_init_odr = odr_createmem (ODR_DECODE);
3573     m_initResponse = 0;
3574     m_initResponse_options = 0;
3575     m_initResponse_version = 0;
3576     m_initResponse_preferredMessageSize = 0;
3577     m_initResponse_maximumRecordSize = 0;
3578     m_resultSetStartPoint = 0;
3579     m_bytes_sent = m_bytes_recv = 0;
3580     m_pdu_recv = 0;
3581     m_server = 0;
3582     m_seqno = 0;
3583     m_target_idletime = 600;
3584     m_root = parent;
3585     m_idAuthentication_odr = odr_createmem(ODR_ENCODE);
3586     m_idAuthentication_ber_buf = 0;
3587     m_idAuthentication_ber_size = 0;
3588 }
3589
3590 const char *Yaz_Proxy::option(const char *name, const char *value)
3591 {
3592     if (!strcmp (name, "optimize")) {
3593         if (value) {
3594             xfree (m_optimize);
3595             m_optimize = xstrdup (value);
3596         }
3597         return m_optimize;
3598     }
3599     return 0;
3600 }
3601
3602 void Yaz_ProxyClient::recv_HTTP_response(Z_HTTP_Response *apdu, int len)
3603 {
3604
3605 }
3606
3607 void Yaz_ProxyClient::recv_GDU(Z_GDU *apdu, int len)
3608 {
3609     if (apdu->which == Z_GDU_Z3950)
3610         recv_Z_PDU(apdu->u.z3950, len);
3611     else if (apdu->which == Z_GDU_HTTP_Response)
3612         recv_HTTP_response(apdu->u.HTTP_Response, len);
3613     else
3614         shutdown();
3615 }
3616
3617 int Yaz_Proxy::handle_init_response_for_invalid_session(Z_APDU *apdu)
3618 {
3619     if (!m_flag_invalid_session)
3620         return 0;
3621     m_flag_invalid_session = 0;
3622     handle_incoming_Z_PDU(m_apdu_invalid_session);
3623     assert (m_mem_invalid_session);
3624     nmem_destroy(m_mem_invalid_session);
3625     m_mem_invalid_session = 0;
3626     return 1;
3627 }
3628
3629 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
3630 {
3631     m_bytes_recv += len;
3632
3633     m_pdu_recv++;
3634     m_waiting = 0;
3635     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
3636         yaz_log (YLOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
3637                  apdu_name(apdu), get_hostname(), len);
3638     if (apdu->which == Z_APDU_initResponse)
3639     {
3640         if (!m_server)  // if this is a pre init session , check for more
3641             m_root->pre_init();
3642         NMEM nmem = odr_extract_mem (odr_decode());
3643         odr_reset (m_init_odr);
3644         nmem_transfer (m_init_odr->mem, nmem);
3645         m_initResponse = apdu;
3646         m_initResponse_options = apdu->u.initResponse->options;
3647         m_initResponse_version = apdu->u.initResponse->protocolVersion;
3648         m_initResponse_preferredMessageSize =
3649             *apdu->u.initResponse->preferredMessageSize;
3650         m_initResponse_maximumRecordSize =
3651             *apdu->u.initResponse->maximumRecordSize;
3652
3653         Z_InitResponse *ir = apdu->u.initResponse;
3654
3655         // apply YAZ Proxy version
3656         char *imv0 = ir->implementationVersion;
3657         char *imv1 = (char*)
3658             odr_malloc(m_init_odr, 20 + (imv0 ? strlen(imv0) : 0));
3659         *imv1 = '\0';
3660         if (imv0)
3661             strcat(imv1, imv0);
3662         strcat(imv1, "/" VERSION);
3663         ir->implementationVersion = imv1;
3664
3665         // apply YAZ Proxy implementation name
3666         char *im0 = ir->implementationName;
3667         char *im1 = (char*)
3668             odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
3669         *im1 = '\0';
3670         if (im0)
3671         {
3672             strcat(im1, im0);
3673             strcat(im1, " ");
3674         }
3675         strcat(im1, "(YAZ Proxy)");
3676         ir->implementationName = im1;
3677
3678         nmem_destroy (nmem);
3679
3680         if (m_server && m_server->handle_init_response_for_invalid_session(apdu))
3681             return;
3682     }
3683     if (apdu->which == Z_APDU_searchResponse)
3684     {
3685         Z_SearchResponse *sr = apdu->u.searchResponse;
3686         m_last_resultCount = *sr->resultCount;
3687         int status = *sr->searchStatus;
3688         if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
3689         {
3690             m_last_ok = 1;
3691
3692             if (sr->records && sr->records->which == Z_Records_DBOSD)
3693             {
3694                 m_cache.add(odr_decode(),
3695                             sr->records->u.databaseOrSurDiagnostics, 1,
3696                             *sr->resultCount);
3697             }
3698         }
3699     }
3700     if (apdu->which == Z_APDU_presentResponse)
3701     {
3702         Z_PresentResponse *pr = apdu->u.presentResponse;
3703         if (m_sr_transform)
3704         {
3705             m_sr_transform = 0;
3706             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
3707             Z_SearchResponse *sr = new_apdu->u.searchResponse;
3708             sr->referenceId = pr->referenceId;
3709             *sr->resultCount = m_last_resultCount;
3710             sr->records = pr->records;
3711             sr->nextResultSetPosition = pr->nextResultSetPosition;
3712             sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
3713             apdu = new_apdu;
3714         }
3715         if (pr->records &&
3716             pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
3717         {
3718             m_cache.add(odr_decode(),
3719                         pr->records->u.databaseOrSurDiagnostics,
3720                         m_resultSetStartPoint, -1);
3721             m_resultSetStartPoint = 0;
3722         }
3723     }
3724     if (m_cookie)
3725         set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
3726
3727     Yaz_Proxy *server = m_server; // save it. send_to_client may destroy us
3728
3729     if (server)
3730         server->send_to_client(apdu);
3731     if (apdu->which == Z_APDU_close)
3732         shutdown();
3733     else if (server)
3734         server->recv_GDU_more(true);
3735 }
3736
3737 void Yaz_Proxy::low_socket_close()
3738 {
3739 #if WIN32
3740 #else
3741     int i;
3742     for (i = 0; i<NO_SPARE_SOLARIS_FD; i++)
3743         if  (m_lo_fd[i] >= 0)
3744             ::close(m_lo_fd[i]);
3745 #endif
3746 }
3747
3748 void Yaz_Proxy::low_socket_open()
3749 {
3750 #if WIN32
3751 #else
3752     int i;
3753     for (i = 0; i<NO_SPARE_SOLARIS_FD; i++)
3754         m_lo_fd[i] = open("/dev/null", O_RDONLY);
3755 #endif
3756 }
3757
3758 int Yaz_Proxy::server(const char *addr)
3759 {
3760     int r = Z_Assoc::server(addr);
3761     if (!r)
3762     {
3763         yaz_log(YLOG_LOG, "%sStarted proxy "
3764 #ifdef VERSION
3765             VERSION
3766 #endif
3767             " on %s", m_session_str, addr);
3768         timeout(1);
3769     }
3770     return r;
3771 }
3772
3773 void Yaz_Proxy::base64_decode(const char *base64, char *buf, int buf_len)
3774 {
3775     const char *base64_chars =
3776         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
3777     int len = strlen(base64);
3778     int buf_pos = 0;
3779     int index = 1;
3780
3781     for (int pos = 0; pos <= len; pos++)
3782     {
3783         if (base64[pos] == '=' || buf_pos + 1 >= buf_len)
3784             break;
3785
3786         const char *ch_ptr = strchr(base64_chars, base64[pos]);
3787         if (!ch_ptr)
3788             break;
3789         char ch = (char) (ch_ptr - base64_chars);
3790         switch (index)
3791         {
3792             case 1:
3793                 buf[buf_pos] = ch << 2;
3794                 break;
3795             case 2:
3796                 buf[buf_pos++] += (ch & 0x30) >> 4;
3797                 buf[buf_pos] = (ch & 0x0f) << 4;
3798                 break;
3799             case 3:
3800                 buf[buf_pos++] += (ch & 0x3c) >> 2;
3801                 buf[buf_pos] = (ch & 0x03) << 6;
3802                 break;
3803             case 4:
3804                 buf[buf_pos++] += ch;
3805         }
3806         if (index < 4)
3807             index++;
3808         else
3809             index = 1;
3810     }
3811     buf[buf_pos] = '\0';
3812 }
3813
3814 /*
3815  * Local variables:
3816  * c-basic-offset: 4
3817  * indent-tabs-mode: nil
3818  * End:
3819  * vim: shiftwidth=4 tabstop=8 expandtab
3820  */
3821