src/yaz-proxy.cpp

   1 /* $Id: yaz-proxy.cpp,v 1.55 2006-04-13 00:02:24 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 0 ",
 437                 (long) time(0), m_session_no, peername);
 438     else
 439         sprintf(session_str, "%ld:%d 0 ",
 440                 (long) time(0), m_session_no);
 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 0 ",
1880                         (long) time(0), m_session_no, m_peername);
1881             else
1882                 sprintf(m_session_str, "%ld:%d 0 ",
1883                         (long) time(0), m_session_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         recv_GDU_reduce(g);
1986     }
1987 }
1988
1989 void Yaz_Proxy::recv_GDU_normal(GDU *gdu)
1990 {
1991     Z_GDU *apdu = 0;
1992     gdu->move_away_gdu(odr_decode(), &apdu);
1993     delete gdu;
1994
1995     if (apdu->which == Z_GDU_Z3950)
1996         handle_incoming_Z_PDU(apdu->u.z3950);
1997     else if (apdu->which == Z_GDU_HTTP_Request)
1998         handle_incoming_HTTP(apdu->u.HTTP_Request);
1999 }
2000
2001 void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
2002 {
2003     if (m_max_record_retrieve)
2004     {
2005         if (apdu->which == Z_APDU_presentRequest)
2006         {
2007             Z_PresentRequest *pr = apdu->u.presentRequest;
2008             if (pr->numberOfRecordsRequested &&
2009                 *pr->numberOfRecordsRequested > m_max_record_retrieve)
2010                 *pr->numberOfRecordsRequested = m_max_record_retrieve;
2011         }
2012     }
2013 }
2014
2015 void Yaz_Proxy::handle_charset_lang_negotiation(Z_APDU *apdu)
2016 {
2017     if (apdu->which == Z_APDU_initRequest)
2018     {
2019         if (m_initRequest_options &&
2020             !ODR_MASK_GET(m_initRequest_options, Z_Options_negotiationModel) &&
2021             (m_proxy_negotiation_charset || m_proxy_negotiation_lang))
2022         {
2023             // There is no negotiation proposal from
2024             // client's side. OK. The proxy negotiation
2025             // in use, only.
2026             Z_InitRequest *initRequest = apdu->u.initRequest;
2027             Z_OtherInformation **otherInfo;
2028             Z_OtherInformationUnit *oi;
2029             get_otherInfoAPDU(apdu, &otherInfo);
2030             oi = update_otherInformation(otherInfo, 1, NULL, 0, 0);
2031             if (oi)
2032             {
2033                 ODR_MASK_SET(initRequest->options,
2034                     Z_Options_negotiationModel);
2035                 oi->which = Z_OtherInfo_externallyDefinedInfo;
2036                 oi->information.externallyDefinedInfo =
2037                 yaz_set_proposal_charneg(odr_encode(),
2038                     (const char**)&m_proxy_negotiation_charset,
2039                     m_proxy_negotiation_charset ? 1:0,
2040                     (const char**)&m_proxy_negotiation_lang,
2041                     m_proxy_negotiation_lang ? 1:0,
2042                     1);
2043             }
2044         }
2045         else if (m_initRequest_options &&
2046                  ODR_MASK_GET(m_initRequest_options,
2047                               Z_Options_negotiationModel) &&
2048                  m_charset_converter->get_target_query_charset())
2049         {
2050             yaz_log(YLOG_LOG, "%sManaged charset negotiation: charset=%s",
2051                     m_session_str,
2052                     m_charset_converter->get_target_query_charset());
2053             Z_InitRequest *initRequest = apdu->u.initRequest;
2054             Z_CharSetandLanguageNegotiation *negotiation =
2055                 yaz_get_charneg_record (initRequest->otherInfo);
2056             if (negotiation &&
2057                 negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2058             {
2059                 NMEM nmem = nmem_create();
2060                 char **charsets = 0;
2061                 int num_charsets = 0;
2062                 char **langs = 0;
2063                 int num_langs = 0;
2064                 int selected = 0;
2065                 yaz_get_proposal_charneg (nmem, negotiation,
2066                                           &charsets, &num_charsets,
2067                                           &langs, &num_langs, &selected);
2068                 int i;
2069                 for (i = 0; i<num_charsets; i++)
2070                     yaz_log(YLOG_LOG, "%scharset %s", m_session_str,
2071                             charsets[i]);
2072                 for (i = 0; i<num_langs; i++)
2073                     yaz_log(YLOG_LOG, "%slang %s", m_session_str,
2074                             langs[i]);
2075
2076                 const char *t_charset =
2077                     m_charset_converter->get_target_query_charset();
2078                 // sweep through charsets and pick the first supported
2079                 // conversion
2080                 for (i = 0; i<num_charsets; i++)
2081                 {
2082                     const char *c_charset = charsets[i];
2083                     if (!odr_set_charset(odr_decode(), t_charset, c_charset))
2084                         break;
2085                 }
2086                 if (i != num_charsets)
2087                 {
2088                     // got one .. set up ODR for reverse direction
2089                     const char *c_charset = charsets[i];
2090                     odr_set_charset(odr_encode(), c_charset, t_charset);
2091                     m_charset_converter->set_client_query_charset(c_charset);
2092                     m_charset_converter->set_client_charset_selected(selected);
2093                 }
2094                 nmem_destroy(nmem);
2095                 ODR_MASK_CLEAR(m_initRequest_options,
2096                                Z_Options_negotiationModel);
2097                 yaz_del_charneg_record(&initRequest->otherInfo);
2098             }
2099             else
2100             {
2101                 yaz_log(YLOG_WARN, "%sUnable to decode charset package",
2102                         m_session_str);
2103             }
2104         }
2105         else if (m_charset_converter->get_target_query_charset() &&
2106             m_proxy_negotiation_default_charset)
2107         {
2108             m_charset_converter->
2109                 set_client_query_charset(m_proxy_negotiation_default_charset);
2110         }
2111     }
2112     else if (apdu->which == Z_APDU_initResponse)
2113     {
2114         Z_InitResponse *initResponse = apdu->u.initResponse;
2115         Z_OtherInformation **otherInfo;
2116         get_otherInfoAPDU(apdu, &otherInfo);
2117
2118         Z_CharSetandLanguageNegotiation *charneg = 0;
2119
2120         if (otherInfo && *otherInfo &&
2121             ODR_MASK_GET(initResponse->options, Z_Options_negotiationModel)
2122             && (charneg = yaz_get_charneg_record(*otherInfo)))
2123         {
2124             char *charset = 0;
2125             char *lang = 0;
2126             int selected = 0;
2127
2128             yaz_get_response_charneg(m_referenceId_mem, charneg,
2129                 &charset, &lang, &selected);
2130
2131             yaz_log(YLOG_LOG, "%sAccepted charset - '%s' and lang - '%s'",
2132                 m_session_str, (charset)?charset:"none", (lang)?lang:"none");
2133
2134             if (m_initRequest_options &&
2135                 ODR_MASK_GET(m_initRequest_options, Z_Options_negotiationModel))
2136             {
2137                 yaz_log(YLOG_LOG, "%sClient's negotiation record in use",
2138                     m_session_str);
2139             }
2140             else if (m_proxy_negotiation_charset || m_proxy_negotiation_lang)
2141             {
2142                 // negotiation-charset, negotiation-lang
2143                 // elements of config file in use.
2144
2145                 yaz_log(YLOG_LOG, "%sProxy's negotiation record in use",
2146                     m_session_str);
2147
2148                 // clear negotiation option.
2149                 ODR_MASK_CLEAR(initResponse->options, Z_Options_negotiationModel);
2150
2151                 // Delete negotiation (charneg-3) entry.
2152                 yaz_del_charneg_record(otherInfo);
2153             }
2154         }
2155         else
2156         {
2157             if (m_proxy_negotiation_charset || m_proxy_negotiation_lang)
2158             {
2159                 yaz_log(YLOG_LOG, "%sTarget did not honor negotiation",
2160                         m_session_str);
2161             }
2162             else if (m_charset_converter->get_client_query_charset())
2163             {
2164                 Z_OtherInformation **otherInfo;
2165                 Z_OtherInformationUnit *oi;
2166                 get_otherInfoAPDU(apdu, &otherInfo);
2167                 oi = update_otherInformation(otherInfo, 1, NULL, 0, 0);
2168                 if (oi)
2169                 {
2170                     ODR_MASK_SET(initResponse->options,
2171                                  Z_Options_negotiationModel);
2172                     if (m_initRequest_options)
2173                         ODR_MASK_SET(m_initRequest_options,
2174                                      Z_Options_negotiationModel);
2175
2176                     oi->which = Z_OtherInfo_externallyDefinedInfo;
2177                     oi->information.externallyDefinedInfo =
2178                         yaz_set_response_charneg(
2179                             odr_encode(),
2180                             m_charset_converter->get_client_query_charset(),
2181                             0 /* no lang */,
2182                             m_charset_converter->get_client_charset_selected());
2183                 }
2184             }
2185         }
2186     }
2187 }
2188
2189 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
2190                                                      int error,
2191                                                      const char *addinfo)
2192 {
2193     Z_Records *rec = (Z_Records *)
2194         odr_malloc (odr, sizeof(*rec));
2195     int *err = (int *)
2196         odr_malloc (odr, sizeof(*err));
2197     Z_DiagRec *drec = (Z_DiagRec *)
2198         odr_malloc (odr, sizeof(*drec));
2199     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
2200         odr_malloc (odr, sizeof(*dr));
2201     *err = error;
2202     rec->which = Z_Records_NSD;
2203     rec->u.nonSurrogateDiagnostic = dr;
2204     dr->diagnosticSetId =
2205         yaz_oidval_to_z3950oid (odr, CLASS_DIAGSET, VAL_BIB1);
2206     dr->condition = err;
2207     dr->which = Z_DefaultDiagFormat_v2Addinfo;
2208     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
2209     return rec;
2210 }
2211
2212 Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
2213 {
2214     if (apdu->which == Z_APDU_searchRequest &&
2215         apdu->u.searchRequest->query &&
2216         apdu->u.searchRequest->query->which == Z_Query_type_104 &&
2217         apdu->u.searchRequest->query->u.type_104->which == Z_External_CQL)
2218     {
2219         Z_RPNQuery *rpnquery = 0;
2220         Z_SearchRequest *sr = apdu->u.searchRequest;
2221         char *addinfo = 0;
2222
2223         yaz_log(YLOG_LOG, "%sCQL: %s", m_session_str,
2224                 sr->query->u.type_104->u.cql);
2225
2226         int r = m_cql2rpn.query_transform(sr->query->u.type_104->u.cql,
2227                                           &rpnquery, odr_encode(),
2228                                           &addinfo);
2229         if (r == -3)
2230             yaz_log(YLOG_LOG, "%sNo CQL to RPN table", m_session_str);
2231         else if (r)
2232         {
2233             yaz_log(YLOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
2234             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2235
2236             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2237             new_apdu->u.searchResponse->records =
2238                 create_nonSurrogateDiagnostics(odr_encode(),
2239                                                yaz_diag_srw_to_bib1(r),
2240                                                addinfo);
2241             *new_apdu->u.searchResponse->searchStatus = 0;
2242
2243             send_to_client(new_apdu);
2244
2245             return 0;
2246         }
2247         else
2248         {
2249             sr->query->which = Z_Query_type_1;
2250             sr->query->u.type_1 = rpnquery;
2251         }
2252         return apdu;
2253     }
2254     return apdu;
2255 }
2256
2257 Z_APDU *Yaz_Proxy::handle_target_charset_conversion(Z_APDU *apdu)
2258 {
2259     if (apdu->which == Z_APDU_searchRequest &&
2260         apdu->u.searchRequest->query)
2261     {
2262         if (apdu->u.searchRequest->query->which == Z_Query_type_1
2263             || apdu->u.searchRequest->query->which == Z_Query_type_101)
2264         {
2265             if (m_http_version)
2266                 m_charset_converter->set_client_query_charset("UTF-8");
2267             Z_RPNQuery *rpnquery = apdu->u.searchRequest->query->u.type_1;
2268             m_charset_converter->convert_type_1(rpnquery, odr_encode());
2269         }
2270     }
2271     return apdu;
2272 }
2273
2274
2275 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
2276 {
2277     if (apdu->which == Z_APDU_searchRequest)
2278     {
2279         Z_SearchRequest *sr = apdu->u.searchRequest;
2280         int err = 0;
2281         char *addinfo = 0;
2282
2283         Yaz_ProxyConfig *cfg = check_reconfigure();
2284         if (cfg)
2285             err = cfg->check_query(odr_encode(), m_default_target,
2286                                    sr->query, &addinfo);
2287         if (err)
2288         {
2289             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2290
2291             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2292             new_apdu->u.searchResponse->records =
2293                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2294             *new_apdu->u.searchResponse->searchStatus = 0;
2295
2296             send_to_client(new_apdu);
2297
2298             return 0;
2299         }
2300     }
2301     return apdu;
2302 }
2303
2304 int Yaz_Proxy::handle_authentication(Z_APDU *apdu)
2305 {
2306     if (apdu->which != Z_APDU_initRequest)
2307         return 1;  // pass if no init request
2308     Z_InitRequest *req = apdu->u.initRequest;
2309
2310     Yaz_ProxyConfig *cfg = check_reconfigure();
2311     if (!cfg)
2312         return 1;  // pass if no config
2313
2314     int ret;
2315     if (req->idAuthentication == 0)
2316     {
2317         ret = cfg->client_authentication(m_default_target, 0, 0, 0,
2318                                          m_peername);
2319     }
2320     else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2321     {
2322         ret = cfg->client_authentication(
2323             m_default_target,
2324             req->idAuthentication->u.idPass->userId,
2325             req->idAuthentication->u.idPass->groupId,
2326             req->idAuthentication->u.idPass->password,
2327             m_peername);
2328     }
2329     else if (req->idAuthentication->which == Z_IdAuthentication_open)
2330     {
2331         char user[64], pass[64];
2332         *user = '\0';
2333         *pass = '\0';
2334         sscanf(req->idAuthentication->u.open, "%63[^/]/%63s", user, pass);
2335         ret = cfg->client_authentication(m_default_target, user, 0, pass,
2336                                          m_peername);
2337     }
2338     else
2339         ret = cfg->client_authentication(m_default_target, 0, 0, 0,
2340                                          m_peername);
2341     return ret;
2342 }
2343
2344 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
2345 {
2346     m_marcxml_mode = none;
2347     if (apdu->which == Z_APDU_searchRequest)
2348     {
2349         Z_SearchRequest *sr = apdu->u.searchRequest;
2350         int err = 0;
2351         char *addinfo = 0;
2352         Yaz_ProxyConfig *cfg = check_reconfigure();
2353
2354         Z_RecordComposition rc_temp, *rc = 0;
2355         if (sr->smallSetElementSetNames)
2356         {
2357             rc_temp.which = Z_RecordComp_simple;
2358             rc_temp.u.simple = sr->smallSetElementSetNames;
2359             rc = &rc_temp;
2360         }
2361
2362         if (sr->preferredRecordSyntax)
2363         {
2364             struct oident *ent;
2365             ent = oid_getentbyoid(sr->preferredRecordSyntax);
2366             m_frontend_type = ent->value;
2367         }
2368         else
2369             m_frontend_type = VAL_NONE;
2370
2371         char *stylesheet_name = 0;
2372         if (cfg)
2373             err = cfg->check_syntax(odr_encode(),
2374                                     m_default_target,
2375                                     sr->preferredRecordSyntax, rc,
2376                                     &addinfo, &stylesheet_name, &m_schema,
2377                                     &m_backend_type, &m_backend_charset,
2378                                     &m_usemarcon_ini_stage1,
2379                                     &m_usemarcon_ini_stage2);
2380         if (stylesheet_name)
2381         {
2382             m_parent->low_socket_close();
2383
2384 #if HAVE_XSLT
2385             if (m_stylesheet_xsp)
2386                 xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
2387             m_stylesheet_xsp = xsltParseStylesheetFile((const xmlChar*)
2388                                                        stylesheet_name);
2389 #endif
2390             m_stylesheet_offset = 0;
2391             xfree(stylesheet_name);
2392
2393             m_parent->low_socket_open();
2394         }
2395         if (err == -1)
2396         {
2397             sr->smallSetElementSetNames = 0;
2398             sr->mediumSetElementSetNames = 0;
2399             m_marcxml_mode = marcxml;
2400             if (m_backend_type)
2401             {
2402
2403                 sr->preferredRecordSyntax =
2404                     yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN,
2405                                         m_backend_type);
2406             }
2407             else
2408                 sr->preferredRecordSyntax =
2409                     yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN,
2410                                            VAL_USMARC);
2411         }
2412         else if (err)
2413         {
2414             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2415
2416             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2417             new_apdu->u.searchResponse->records =
2418                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2419             *new_apdu->u.searchResponse->searchStatus = 0;
2420
2421             send_to_client(new_apdu);
2422
2423             return 0;
2424         }
2425         else if (m_backend_type)
2426         {
2427             sr->preferredRecordSyntax =
2428                 yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN, m_backend_type);
2429         }
2430     }
2431     else if (apdu->which == Z_APDU_presentRequest)
2432     {
2433         Z_PresentRequest *pr = apdu->u.presentRequest;
2434         int err = 0;
2435         char *addinfo = 0;
2436         Yaz_ProxyConfig *cfg = check_reconfigure();
2437
2438         if (pr->preferredRecordSyntax)
2439         {
2440             struct oident *ent;
2441             ent = oid_getentbyoid(pr->preferredRecordSyntax);
2442             m_frontend_type = ent->value;
2443         }
2444         else
2445             m_frontend_type = VAL_NONE;
2446
2447         char *stylesheet_name = 0;
2448         if (cfg)
2449             err = cfg->check_syntax(odr_encode(), m_default_target,
2450                                     pr->preferredRecordSyntax,
2451                                     pr->recordComposition,
2452                                     &addinfo, &stylesheet_name, &m_schema,
2453                                     &m_backend_type, &m_backend_charset,
2454                                     &m_usemarcon_ini_stage1,
2455                                     &m_usemarcon_ini_stage2
2456                                     );
2457         if (stylesheet_name)
2458         {
2459             m_parent->low_socket_close();
2460
2461 #if HAVE_XSLT
2462             if (m_stylesheet_xsp)
2463                 xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
2464             m_stylesheet_xsp = xsltParseStylesheetFile((const xmlChar*)
2465                                                        stylesheet_name);
2466 #endif
2467             m_stylesheet_offset = 0;
2468             xfree(stylesheet_name);
2469
2470             m_parent->low_socket_open();
2471         }
2472         if (err == -1)
2473         {
2474             pr->recordComposition = 0;
2475             m_marcxml_mode = marcxml;
2476             if (m_backend_type)
2477             {
2478
2479                 pr->preferredRecordSyntax =
2480                     yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN,
2481                                         m_backend_type);
2482             }
2483             else
2484                 pr->preferredRecordSyntax =
2485                     yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN,
2486                                            VAL_USMARC);
2487         }
2488         else if (err)
2489         {
2490             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
2491
2492             new_apdu->u.presentResponse->referenceId = pr->referenceId;
2493             new_apdu->u.presentResponse->records =
2494                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2495             *new_apdu->u.presentResponse->presentStatus =
2496                 Z_PresentStatus_failure;
2497
2498             send_to_client(new_apdu);
2499
2500             return 0;
2501         }
2502         else if (m_backend_type)
2503         {
2504             pr->preferredRecordSyntax =
2505                 yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN, m_backend_type);
2506         }
2507     }
2508     return apdu;
2509 }
2510
2511 Z_ElementSetNames *Yaz_Proxy::mk_esn_from_schema(ODR o, const char *schema)
2512 {
2513     if (!schema)
2514         return 0;
2515     Z_ElementSetNames *esn = (Z_ElementSetNames *)
2516         odr_malloc(o, sizeof(Z_ElementSetNames));
2517     esn->which = Z_ElementSetNames_generic;
2518     esn->u.generic = odr_strdup(o, schema);
2519     return esn;
2520 }
2521
2522 void Yaz_Proxy::srw_get_client(const char *db, const char **backend_db)
2523 {
2524     const char *t = 0;
2525     Yaz_ProxyConfig *cfg = check_reconfigure();
2526     if (cfg)
2527         t = cfg->get_explain_name(db, backend_db);
2528
2529     if (m_client && m_default_target && t && strcmp(m_default_target, t))
2530     {
2531         releaseClient();
2532     }
2533
2534     if (t)
2535     {
2536         xfree(m_default_target);
2537         m_default_target = xstrdup(t);
2538     }
2539 }
2540
2541 int Yaz_Proxy::file_access(Z_HTTP_Request *hreq)
2542 {
2543     struct stat sbuf;
2544     if (strcmp(hreq->method, "GET"))
2545         return 0;
2546     if (hreq->path[0] != '/')
2547         return 0;
2548     const char *cp = hreq->path;
2549     while (*cp)
2550     {
2551         if (*cp == '/' && strchr("/.", cp[1]))
2552             return 0;
2553         cp++;
2554     }
2555
2556     Yaz_ProxyConfig *cfg = check_reconfigure();
2557
2558     if (!cfg->get_file_access_info(hreq->path+1))
2559         return 0;
2560
2561     const char *fname = hreq->path+1;
2562     if (stat(fname, &sbuf))
2563     {
2564         yaz_log(YLOG_LOG|YLOG_ERRNO, "%sstat failed for %s", m_session_str,
2565                 fname);
2566         return 0;
2567     }
2568     if ((sbuf.st_mode & S_IFMT) != S_IFREG)
2569     {
2570         yaz_log(YLOG_LOG, "%sNot a regular file %s", m_session_str, fname);
2571         return 0;
2572     }
2573     if (sbuf.st_size > (off_t) 1000000)
2574     {
2575         yaz_log(YLOG_WARN, "%sFile %s too large for transfer", m_session_str,
2576                 fname);
2577         return 0;
2578     }
2579
2580     ODR o = odr_encode();
2581
2582     const char *ctype = cfg->check_mime_type(fname);
2583     Z_GDU *gdu = z_get_HTTP_Response(o, 200);
2584     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
2585     if (m_http_version)
2586         hres->version = odr_strdup(o, m_http_version);
2587     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
2588     if (m_http_keepalive)
2589         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
2590     else
2591         timeout(0);
2592
2593     hres->content_len = sbuf.st_size;
2594     hres->content_buf = (char*) odr_malloc(o, hres->content_len);
2595     FILE *f = fopen(fname, "rb");
2596     if (f)
2597     {
2598         fread(hres->content_buf, 1, hres->content_len, f);
2599         fclose(f);
2600     }
2601     else
2602     {
2603         return 0;
2604     }
2605     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
2606     {
2607         yaz_log (YLOG_LOG, "%sSending file %s to client", m_session_str,
2608                  fname);
2609     }
2610     int len;
2611     send_GDU(gdu, &len);
2612     recv_GDU_more(true);
2613     return 1;
2614 }
2615
2616 void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
2617 {
2618     if (m_s2z_odr_init)
2619     {
2620         odr_destroy(m_s2z_odr_init);
2621         m_s2z_odr_init = 0;
2622     }
2623     if (m_s2z_odr_search)
2624     {
2625         odr_destroy(m_s2z_odr_search);
2626         m_s2z_odr_search = 0;
2627     }
2628
2629     m_http_keepalive = 0;
2630     m_http_version = 0;
2631     if (!strcmp(hreq->version, "1.0"))
2632     {
2633         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
2634         if (v && !strcmp(v, "Keep-Alive"))
2635             m_http_keepalive = 1;
2636         else
2637             m_http_keepalive = 0;
2638         m_http_version = "1.0";
2639     }
2640     else
2641     {
2642         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
2643         if (v && !strcmp(v, "close"))
2644             m_http_keepalive = 0;
2645         else
2646             m_http_keepalive = 1;
2647         m_http_version = "1.1";
2648     }
2649
2650     const char *a = z_HTTP_header_lookup(hreq->headers, "Authorization");
2651     char authorization_str[255];
2652     *authorization_str = '\0';
2653     if (a && strncasecmp(a, "Basic ", 6) == 0)
2654         base64_decode(a + 6, authorization_str, 254);
2655
2656     Z_SRW_PDU *srw_pdu = 0;
2657     Z_SOAP *soap_package = 0;
2658     char *charset = 0;
2659     Z_SRW_diagnostic *diagnostic = 0;
2660     int num_diagnostic = 0;
2661
2662     yaz_log(YLOG_LOG, "%s%s %s", m_session_str, hreq->method, hreq->path);
2663
2664     if (file_access(hreq))
2665     {
2666         return;
2667     }
2668     else if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
2669                             &charset) == 0
2670              || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
2671                                &charset, &diagnostic, &num_diagnostic) == 0)
2672     {
2673         m_s2z_odr_init = odr_createmem(ODR_ENCODE);
2674         m_s2z_odr_search = odr_createmem(ODR_ENCODE);
2675         m_soap_ns = odr_strdup(m_s2z_odr_search, soap_package->ns);
2676         m_s2z_init_apdu = 0;
2677         m_s2z_search_apdu = 0;
2678         m_s2z_present_apdu = 0;
2679
2680         m_s2z_stylesheet = 0;
2681
2682         Z_IdAuthentication *auth = NULL;
2683         if (*authorization_str)
2684         {
2685             auth = (Z_IdAuthentication *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdAuthentication));
2686             auth->which = Z_IdAuthentication_idPass;
2687             auth->u.idPass = (Z_IdPass *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdPass));
2688             auth->u.idPass->groupId = NULL;
2689             char *p = strchr(authorization_str, ':');
2690             if (p)
2691             {
2692                 *p = '\0';
2693                 p++;
2694                 auth->u.idPass->password = odr_strdup(m_s2z_odr_init, p);
2695             }
2696             auth->u.idPass->userId = odr_strdup(m_s2z_odr_init, authorization_str);
2697         }
2698
2699         if (srw_pdu->which == Z_SRW_searchRetrieve_request)
2700         {
2701
2702             Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
2703
2704             const char *backend_db = srw_req->database;
2705             srw_get_client(srw_req->database, &backend_db);
2706
2707             m_s2z_database = odr_strdup(m_s2z_odr_init, srw_req->database);
2708             // recordXPath unsupported.
2709             if (srw_req->recordXPath)
2710             {
2711                 yaz_add_srw_diagnostic(odr_decode(),
2712                                        &diagnostic, &num_diagnostic,
2713                                        72, 0);
2714             }
2715             // sort unsupported
2716             if (srw_req->sort_type != Z_SRW_sort_type_none)
2717             {
2718                 yaz_add_srw_diagnostic(odr_decode(),
2719                                        &diagnostic, &num_diagnostic,
2720                                        80, 0);
2721             }
2722             // save stylesheet
2723             if (srw_req->stylesheet)
2724                 m_s2z_stylesheet =
2725                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
2726
2727             // set packing for response records ..
2728             if (srw_req->recordPacking &&
2729                 !strcmp(srw_req->recordPacking, "xml"))
2730                 m_s2z_packing = Z_SRW_recordPacking_XML;
2731             else
2732                 m_s2z_packing = Z_SRW_recordPacking_string;
2733
2734             if (num_diagnostic)
2735             {
2736                 Z_SRW_PDU *srw_pdu =
2737                     yaz_srw_get(odr_encode(),
2738                                 Z_SRW_searchRetrieve_response);
2739                 Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
2740
2741                 srw_res->diagnostics = diagnostic;
2742                 srw_res->num_diagnostics = num_diagnostic;
2743                 send_srw_response(srw_pdu);
2744                 return;
2745             }
2746
2747             // prepare search PDU
2748             m_s2z_search_apdu = zget_APDU(m_s2z_odr_search,
2749                                           Z_APDU_searchRequest);
2750             Z_SearchRequest *z_searchRequest =
2751                 m_s2z_search_apdu->u.searchRequest;
2752
2753             z_searchRequest->num_databaseNames = 1;
2754             z_searchRequest->databaseNames = (char**)
2755                 odr_malloc(m_s2z_odr_search, sizeof(char *));
2756             z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
2757                                                            backend_db);
2758
2759             // query transformation
2760             Z_Query *query = (Z_Query *)
2761                 odr_malloc(m_s2z_odr_search, sizeof(Z_Query));
2762             z_searchRequest->query = query;
2763
2764             if (srw_req->query_type == Z_SRW_query_type_cql)
2765             {
2766                 Z_External *ext = (Z_External *)
2767                     odr_malloc(m_s2z_odr_search, sizeof(*ext));
2768                 ext->direct_reference =
2769                     odr_getoidbystr(m_s2z_odr_search, "1.2.840.10003.16.2");
2770                 ext->indirect_reference = 0;
2771                 ext->descriptor = 0;
2772                 ext->which = Z_External_CQL;
2773                 ext->u.cql = srw_req->query.cql;
2774
2775                 query->which = Z_Query_type_104;
2776                 query->u.type_104 =  ext;
2777             }
2778             else if (srw_req->query_type == Z_SRW_query_type_pqf)
2779             {
2780                 Z_RPNQuery *RPNquery;
2781                 YAZ_PQF_Parser pqf_parser;
2782
2783                 pqf_parser = yaz_pqf_create ();
2784
2785                 RPNquery = yaz_pqf_parse (pqf_parser, m_s2z_odr_search,
2786                                           srw_req->query.pqf);
2787                 if (!RPNquery)
2788                 {
2789                     const char *pqf_msg;
2790                     size_t off;
2791                     int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
2792                     int ioff = off;
2793                     yaz_log(YLOG_LOG, "%*s^\n", ioff+4, "");
2794                     yaz_log(YLOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
2795
2796                     send_to_srw_client_error(10, 0);
2797                     return;
2798                 }
2799                 query->which = Z_Query_type_1;
2800                 query->u.type_1 =  RPNquery;
2801
2802                 yaz_pqf_destroy (pqf_parser);
2803             }
2804             else
2805             {
2806                 send_to_srw_client_error(7, "query");
2807                 return;
2808             }
2809
2810             // present
2811             m_s2z_present_apdu = 0;
2812             int max = 0;
2813             if (srw_req->maximumRecords)
2814                 max = *srw_req->maximumRecords;
2815             int start = 1;
2816             if (srw_req->startRecord)
2817                 start = *srw_req->startRecord;
2818             if (max > 0)
2819             {
2820                 // Some backend, such as Voyager doesn't honor piggyback
2821                 // So we use present always (0 &&).
2822                 if (0 && start <= 1)  // Z39.50 piggyback
2823                 {
2824                     *z_searchRequest->smallSetUpperBound = max;
2825                     *z_searchRequest->mediumSetPresentNumber = max;
2826                     *z_searchRequest->largeSetLowerBound = 2000000000; // 2e9
2827
2828                     z_searchRequest->preferredRecordSyntax =
2829                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
2830                                                VAL_TEXT_XML);
2831                     if (srw_req->recordSchema)
2832                     {
2833                         z_searchRequest->smallSetElementSetNames =
2834                             z_searchRequest->mediumSetElementSetNames =
2835                             mk_esn_from_schema(m_s2z_odr_search,
2836                                                srw_req->recordSchema);
2837                     }
2838                 }
2839                 else   // Z39.50 present
2840                 {
2841                     m_s2z_present_apdu = zget_APDU(m_s2z_odr_search,
2842                                                    Z_APDU_presentRequest);
2843                     Z_PresentRequest *z_presentRequest =
2844                         m_s2z_present_apdu->u.presentRequest;
2845                     *z_presentRequest->resultSetStartPoint = start;
2846                     *z_presentRequest->numberOfRecordsRequested = max;
2847                     z_presentRequest->preferredRecordSyntax =
2848                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
2849                                                VAL_TEXT_XML);
2850                     if (srw_req->recordSchema)
2851                     {
2852                         z_presentRequest->recordComposition =
2853                             (Z_RecordComposition *)
2854                             odr_malloc(m_s2z_odr_search,
2855                                        sizeof(Z_RecordComposition));
2856                         z_presentRequest->recordComposition->which =
2857                             Z_RecordComp_simple;
2858                         z_presentRequest->recordComposition->u.simple =
2859                             mk_esn_from_schema(m_s2z_odr_search,
2860                                                srw_req->recordSchema);
2861                     }
2862                 }
2863             }
2864             if (!m_client)
2865             {
2866                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
2867                                             Z_APDU_initRequest);
2868
2869                 m_s2z_init_apdu->u.initRequest->idAuthentication = auth;
2870
2871                 // prevent m_initRequest_apdu memory from being grabbed
2872                 // in Yaz_Proxy::handle_incoming_Z_PDU
2873                 m_initRequest_apdu = m_s2z_init_apdu;
2874                 handle_incoming_Z_PDU(m_s2z_init_apdu);
2875                 return;
2876             }
2877             else
2878             {
2879                 handle_incoming_Z_PDU(m_s2z_search_apdu);
2880                 return;
2881             }
2882         }
2883         else if (srw_pdu->which == Z_SRW_explain_request)
2884         {
2885             Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
2886
2887             const char *backend_db = srw_req->database;
2888             srw_get_client(srw_req->database, &backend_db);
2889
2890             m_s2z_database = odr_strdup(m_s2z_odr_init, srw_req->database);
2891
2892             // save stylesheet
2893             if (srw_req->stylesheet)
2894                 m_s2z_stylesheet =
2895                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
2896
2897             if (srw_req->recordPacking &&
2898                 !strcmp(srw_req->recordPacking, "xml"))
2899                 m_s2z_packing = Z_SRW_recordPacking_XML;
2900             else
2901                 m_s2z_packing = Z_SRW_recordPacking_string;
2902
2903             if (num_diagnostic)
2904             {
2905                 send_srw_explain_response(diagnostic, num_diagnostic);
2906                 return;
2907             }
2908
2909             if (!m_client)
2910             {
2911                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
2912                                             Z_APDU_initRequest);
2913
2914                 m_s2z_init_apdu->u.initRequest->idAuthentication = auth;
2915
2916                 // prevent m_initRequest_apdu memory from being grabbed
2917                 // in Yaz_Proxy::handle_incoming_Z_PDU
2918                 m_initRequest_apdu = m_s2z_init_apdu;
2919                 handle_incoming_Z_PDU(m_s2z_init_apdu);
2920             }
2921             else
2922                 send_srw_explain_response(0, 0);
2923             return;
2924         }
2925         else if (srw_pdu->which == Z_SRW_scan_request)
2926         {
2927             m_s2z_database = odr_strdup(m_s2z_odr_init,
2928                                         srw_pdu->u.scan_request->database);
2929
2930             yaz_add_srw_diagnostic(odr_decode(),
2931                                    &diagnostic, &num_diagnostic,
2932                                    4, "scan");
2933             Z_SRW_PDU *srw_pdu =
2934                 yaz_srw_get(odr_encode(),
2935                             Z_SRW_scan_response);
2936             Z_SRW_scanResponse *srw_res = srw_pdu->u.scan_response;
2937
2938             srw_res->diagnostics = diagnostic;
2939             srw_res->num_diagnostics = num_diagnostic;
2940             send_srw_response(srw_pdu);
2941             return;
2942         }
2943         else
2944         {
2945             m_s2z_database = 0;
2946
2947             send_to_srw_client_error(4, 0);
2948         }
2949     }
2950     send_http_response(400);
2951 }
2952
2953 void Yaz_Proxy::handle_init(Z_APDU *apdu)
2954 {
2955
2956     Z_OtherInformation **oi;
2957     get_otherInfoAPDU(apdu, &oi);
2958
2959     if (apdu->u.initRequest->implementationId)
2960         yaz_log(YLOG_LOG, "%simplementationId: %s",
2961                 m_session_str, apdu->u.initRequest->implementationId);
2962     if (apdu->u.initRequest->implementationName)
2963         yaz_log(YLOG_LOG, "%simplementationName: %s",
2964                 m_session_str, apdu->u.initRequest->implementationName);
2965     if (apdu->u.initRequest->implementationVersion)
2966         yaz_log(YLOG_LOG, "%simplementationVersion: %s",
2967                 m_session_str, apdu->u.initRequest->implementationVersion);
2968     if (m_initRequest_apdu == 0)
2969     {
2970         if (m_initRequest_mem)
2971             nmem_destroy(m_initRequest_mem);
2972
2973         m_initRequest_apdu = apdu;
2974         m_initRequest_mem = odr_extract_mem(odr_decode());
2975
2976         m_initRequest_preferredMessageSize = *apdu->u.initRequest->
2977             preferredMessageSize;
2978         *apdu->u.initRequest->preferredMessageSize = 1024*1024;
2979         m_initRequest_maximumRecordSize = *apdu->u.initRequest->
2980             maximumRecordSize;
2981         *apdu->u.initRequest->maximumRecordSize = 1024*1024;
2982
2983         Z_CharSetandLanguageNegotiation *charSetandLangRecord =
2984             yaz_get_charneg_record(*oi);
2985
2986         // Save proposal charsets and langs.
2987         if (ODR_MASK_GET(apdu->u.initRequest->options,
2988                          Z_Options_negotiationModel)
2989             && charSetandLangRecord)
2990         {
2991
2992             yaz_get_proposal_charneg(m_referenceId_mem,
2993                                      charSetandLangRecord,
2994                                      &m_initRequest_oi_negotiation_charsets,
2995                                      &m_initRequest_oi_negotiation_num_charsets,
2996                                      &m_initRequest_oi_negotiation_langs,
2997                                      &m_initRequest_oi_negotiation_num_langs,
2998                                      &m_initRequest_oi_negotiation_selected);
2999
3000             for (int i = 0; i<m_initRequest_oi_negotiation_num_charsets; i++)
3001             {
3002                 yaz_log(YLOG_LOG, "%scharacters set proposal: %s",
3003                         m_session_str,(m_initRequest_oi_negotiation_charsets[i])?
3004                         m_initRequest_oi_negotiation_charsets[i]:"none");
3005             }
3006             for (int i=0; i<m_initRequest_oi_negotiation_num_langs; i++)
3007             {
3008                 yaz_log(YLOG_LOG, "%slanguages proposal: %s",
3009                         m_session_str, (m_initRequest_oi_negotiation_langs[i])?
3010                         m_initRequest_oi_negotiation_langs[i]:"none");
3011             }
3012             yaz_log(YLOG_LOG, "%sselected proposal: %d (boolean)",
3013                     m_session_str, m_initRequest_oi_negotiation_selected);
3014         }
3015         // save init options for the response..
3016         m_initRequest_options = apdu->u.initRequest->options;
3017
3018         apdu->u.initRequest->options =
3019             (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
3020                                        sizeof(Odr_bitmask));
3021         ODR_MASK_ZERO(apdu->u.initRequest->options);
3022         int i;
3023         for (i = 0; i<= 24; i++)
3024             ODR_MASK_SET(apdu->u.initRequest->options, i);
3025         // check negotiation option
3026         if (!ODR_MASK_GET(m_initRequest_options,
3027                           Z_Options_negotiationModel))
3028         {
3029             ODR_MASK_CLEAR(apdu->u.initRequest->options,
3030                            Z_Options_negotiationModel);
3031         }
3032         ODR_MASK_CLEAR(apdu->u.initRequest->options,
3033                        Z_Options_concurrentOperations);
3034         // make new version
3035         m_initRequest_version = apdu->u.initRequest->protocolVersion;
3036         apdu->u.initRequest->protocolVersion =
3037             (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
3038                                        sizeof(Odr_bitmask));
3039         ODR_MASK_ZERO(apdu->u.initRequest->protocolVersion);
3040
3041         for (i = 0; i<= 8; i++)
3042             ODR_MASK_SET(apdu->u.initRequest->protocolVersion, i);
3043     }
3044     handle_charset_lang_negotiation(apdu);
3045     if (m_client->m_init_flag)
3046     {
3047         if (handle_init_response_for_invalid_session(apdu))
3048             return;
3049         if (m_client->m_initResponse)
3050         {
3051             Z_APDU *apdu2 = m_client->m_initResponse;
3052             apdu2->u.initResponse->otherInfo = 0;
3053             if (m_client->m_cookie && *m_client->m_cookie)
3054                 set_otherInformationString(apdu2, VAL_COOKIE, 1,
3055                                            m_client->m_cookie);
3056             apdu2->u.initResponse->referenceId =
3057                 apdu->u.initRequest->referenceId;
3058             apdu2->u.initResponse->options = m_client->m_initResponse_options;
3059             apdu2->u.initResponse->protocolVersion =
3060                 m_client->m_initResponse_version;
3061
3062             handle_charset_lang_negotiation(apdu2);
3063
3064             send_to_client(apdu2);
3065             m_timeout_mode = timeout_normal;
3066             return;
3067         }
3068     }
3069     m_client->m_init_flag = 1;
3070
3071 #if USE_AUTH_MSG
3072     Auth_Msg *m = new Auth_Msg;
3073     m->m_proxy = this;
3074     z_APDU(odr_encode(), &apdu, 0, "encode");
3075     char *apdu_buf = odr_getbuf(odr_encode(), &m->m_apdu_len, 0);
3076     m->m_apdu_buf = (char*) nmem_malloc(m->m_nmem, m->m_apdu_len);
3077     memcpy(m->m_apdu_buf, apdu_buf, m->m_apdu_len);
3078     odr_reset(odr_encode());
3079
3080     inc_ref();
3081     m_my_thread->put(m);
3082 #else
3083     int ret = handle_authentication(apdu);
3084     result_authentication(apdu, ret);
3085 #endif
3086 }
3087
3088 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
3089 {
3090     Z_ReferenceId **refid = get_referenceIdP(apdu);
3091     nmem_reset(m_referenceId_mem);
3092     if (refid && *refid)
3093     {
3094         m_referenceId = (Z_ReferenceId *)
3095             nmem_malloc(m_referenceId_mem, sizeof(*m_referenceId));
3096         m_referenceId->len = m_referenceId->size = (*refid)->len;
3097         m_referenceId->buf = (unsigned char *)
3098             nmem_malloc(m_referenceId_mem, (*refid)->len);
3099         memcpy(m_referenceId->buf, (*refid)->buf, (*refid)->len);
3100     }
3101     else
3102         m_referenceId = 0;
3103
3104     if (!m_client && m_flag_invalid_session)
3105     {
3106         // Got request for a session that is invalid..
3107         m_apdu_invalid_session = apdu; // save package
3108         m_mem_invalid_session = odr_extract_mem(odr_decode());
3109         apdu = m_initRequest_apdu;     // but throw an init to the target
3110     }
3111
3112     if (apdu->which == Z_APDU_searchRequest)
3113         m_search_stat.add_bytes(1);
3114
3115     // Determine our client.
3116     Z_OtherInformation **oi;
3117     get_otherInfoAPDU(apdu, &oi);
3118     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi));
3119     if (!m_client)
3120     {
3121         if (m_http_version)
3122         {   // HTTP. Send not found
3123             send_http_response(404);
3124             return;
3125         }
3126         else
3127         {
3128             // Z39.50 just shutdown
3129             timeout(0);
3130             return;
3131         }
3132     }
3133
3134     m_client->m_server = this;
3135
3136     if (apdu->which == Z_APDU_initRequest)
3137         handle_init(apdu);
3138     else
3139         handle_incoming_Z_PDU_2(apdu);
3140 }
3141
3142 void Yaz_Proxy::handle_incoming_Z_PDU_2(Z_APDU *apdu)
3143 {
3144     handle_max_record_retrieve(apdu);
3145
3146     if (apdu)
3147         apdu = handle_syntax_validation(apdu);
3148
3149     if (apdu)
3150         apdu = handle_query_transformation(apdu);
3151
3152     if (apdu)
3153         apdu = handle_target_charset_conversion(apdu);
3154
3155     if (apdu)
3156         apdu = handle_query_validation(apdu);
3157
3158     if (apdu)
3159         apdu = result_set_optimize(apdu);
3160
3161     if (!apdu)
3162     {
3163         m_client->timeout(m_target_idletime);  // mark it active even
3164         recv_GDU_more(true);
3165         // though we didn't use it
3166         return;
3167     }
3168
3169     // delete other info construct completely if 0 elements
3170     Z_OtherInformation **oi;
3171     get_otherInfoAPDU(apdu, &oi);
3172     if (oi && *oi && (*oi)->num_elements == 0)
3173         *oi = 0;
3174
3175     if (apdu->which == Z_APDU_presentRequest &&
3176         m_client->m_resultSetStartPoint == 0)
3177     {
3178         Z_PresentRequest *pr = apdu->u.presentRequest;
3179         m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
3180         m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
3181     } else {
3182         m_client->m_resultSetStartPoint = 0;
3183     }
3184     if (m_client->send_to_target(apdu) < 0)
3185     {
3186         m_client->shutdown();
3187     }
3188     else
3189         m_client->m_waiting = 1;
3190 }
3191
3192 void Yaz_Proxy::connectNotify()
3193 {
3194 }
3195
3196 void Yaz_Proxy::releaseClient()
3197 {
3198     xfree(m_proxyTarget);
3199     m_proxyTarget = 0;
3200     m_flag_invalid_session = 0;
3201     // only keep if keep_alive flag is set...
3202     if (m_client &&
3203         m_client->m_pdu_recv < m_keepalive_limit_pdu &&
3204         m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
3205         m_client->m_waiting == 0)
3206     {
3207         yaz_log(YLOG_LOG, "%sShutdown (client to proxy) keepalive %s",
3208                  m_session_str,
3209                  m_client->get_hostname());
3210         yaz_log(YLOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
3211                 m_session_str, m_client->m_pdu_recv,
3212                 m_client->m_bytes_sent + m_client->m_bytes_recv,
3213                 m_keepalive_limit_bw, m_keepalive_limit_pdu);
3214         assert (m_client->m_waiting != 2);
3215         // Tell client (if any) that no server connection is there..
3216         m_client->m_server = 0;
3217         m_client = 0;
3218     }
3219     else if (m_client)
3220     {
3221         yaz_log (YLOG_LOG, "%sShutdown (client to proxy) close %s",
3222                  m_session_str,
3223                  m_client->get_hostname());
3224         assert (m_client->m_waiting != 2);
3225         delete m_client;
3226         m_client = 0;
3227     }
3228     else if (!m_parent)
3229     {
3230         yaz_log (YLOG_LOG, "%sshutdown (client to proxy) bad state",
3231                  m_session_str);
3232         assert (m_parent);
3233     }
3234     else
3235     {
3236         yaz_log (YLOG_LOG, "%sShutdown (client to proxy)",
3237                  m_session_str);
3238     }
3239     if (m_parent)
3240         m_parent->pre_init();
3241 }
3242
3243 bool Yaz_Proxy::dec_ref(bool main_ptr)
3244 {
3245     assert(m_ref_count > 0);
3246     if (main_ptr)
3247     {
3248         if (m_main_ptr_dec)
3249             return false;
3250         m_main_ptr_dec = true;
3251     }
3252
3253     m_http_keepalive = 0;
3254
3255     --m_ref_count;
3256     if (m_ref_count > 0)
3257         return false;
3258
3259     releaseClient();
3260
3261     delete this;
3262     return true;
3263 }
3264
3265 const char *Yaz_ProxyClient::get_session_str()
3266 {
3267     if (!m_server)
3268         return "0 ";
3269     return m_server->get_session_str();
3270 }
3271
3272 void Yaz_ProxyClient::shutdown()
3273 {
3274     yaz_log (YLOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
3275              get_hostname());
3276
3277     if (m_server)
3278     {
3279         m_waiting = 1;      // ensure it's released from Proxy in releaseClient
3280         m_server->dec_ref(true);
3281     }
3282     else
3283         delete this;
3284 }
3285
3286 void Yaz_Proxy::failNotify()
3287 {
3288     inc_request_no();
3289     yaz_log (YLOG_LOG, "%sConnection closed by client",
3290              get_session_str());
3291     dec_ref(true);
3292 }
3293
3294 void Yaz_Proxy::send_response_fail_client(const char *addr)
3295 {
3296     if (m_http_version)
3297     {
3298         Z_SRW_diagnostic *diagnostic = 0;
3299         int num_diagnostic = 0;
3300
3301         yaz_add_srw_diagnostic(odr_encode(),
3302                                &diagnostic, &num_diagnostic,
3303                                YAZ_SRW_SYSTEM_TEMPORARILY_UNAVAILABLE, addr);
3304         if (m_s2z_search_apdu)
3305             send_srw_search_response(diagnostic, num_diagnostic);
3306         else
3307             send_srw_explain_response(diagnostic, num_diagnostic);
3308     }
3309 }
3310 void Yaz_ProxyClient::failNotify()
3311 {
3312     if (m_server)
3313         m_server->inc_request_no();
3314     yaz_log (YLOG_LOG, "%sConnection closed by target %s",
3315              get_session_str(), get_hostname());
3316
3317     if (m_server)
3318         m_server->send_response_fail_client(get_hostname());
3319     shutdown();
3320 }
3321
3322 void Yaz_ProxyClient::connectNotify()
3323 {
3324     const char *s = get_session_str();
3325     const char *h = get_hostname();
3326     yaz_log (YLOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
3327              m_target_idletime);
3328     timeout(m_target_idletime);
3329     if (!m_server)
3330         pre_init_client();
3331 }
3332
3333 IPDU_Observer *Yaz_ProxyClient::sessionNotify(IPDU_Observable
3334                                               *the_PDU_Observable, int fd)
3335 {
3336     return new Yaz_ProxyClient(the_PDU_Observable, 0);
3337 }
3338
3339 Yaz_ProxyClient::~Yaz_ProxyClient()
3340 {
3341     if (m_prev)
3342         *m_prev = m_next;
3343     if (m_next)
3344         m_next->m_prev = m_prev;
3345     m_waiting = 2;     // for debugging purposes only.
3346     odr_destroy(m_init_odr);
3347     odr_destroy(m_idAuthentication_odr);
3348     delete m_last_query;
3349     xfree (m_last_resultSetId);
3350     xfree (m_cookie);
3351 }
3352
3353 void Yaz_ProxyClient::pre_init_client()
3354 {
3355     Z_APDU *apdu = create_Z_PDU(Z_APDU_initRequest);
3356     Z_InitRequest *req = apdu->u.initRequest;
3357
3358     int i;
3359     for (i = 0; i<= 24; i++)
3360         ODR_MASK_SET(req->options, i);
3361     ODR_MASK_CLEAR(apdu->u.initRequest->options,
3362                    Z_Options_negotiationModel);
3363     ODR_MASK_CLEAR(apdu->u.initRequest->options,
3364                    Z_Options_concurrentOperations);
3365     for (i = 0; i<= 10; i++)
3366         ODR_MASK_SET(req->protocolVersion, i);
3367
3368     if (send_to_target(apdu) < 0)
3369     {
3370         delete this;
3371     }
3372     else
3373     {
3374         m_waiting = 1;
3375         m_init_flag = 1;
3376     }
3377 }
3378
3379 void Yaz_Proxy::pre_init()
3380 {
3381     int i;
3382     const char *name = 0;
3383     const char *zurl_in_use[MAX_ZURL_PLEX];
3384     int limit_bw, limit_pdu, limit_req, limit_search;
3385     int target_idletime, client_idletime;
3386     int max_clients;
3387     int keepalive_limit_bw, keepalive_limit_pdu;
3388     int pre_init;
3389     const char *cql2rpn = 0;
3390     const char *authentication = 0;
3391     const char *negotiation_charset = 0;
3392     const char *negotiation_lang = 0;
3393
3394     Yaz_ProxyConfig *cfg = check_reconfigure();
3395
3396     zurl_in_use[0] = 0;
3397
3398     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
3399         set_APDU_yazlog(1);
3400     else
3401         set_APDU_yazlog(0);
3402
3403     for (i = 0; cfg && cfg->get_target_no(i, &name, zurl_in_use,
3404                                           &limit_bw, &limit_pdu, &limit_req,
3405                                           &limit_search,
3406                                           &target_idletime, &client_idletime,
3407                                           &max_clients,
3408                                           &keepalive_limit_bw,
3409                                           &keepalive_limit_pdu,
3410                                           &pre_init,
3411                                           &cql2rpn,
3412                                           &authentication,
3413                                           &negotiation_charset,
3414                                           &negotiation_lang,
3415                                           0,
3416                                           0) ; i++)
3417     {
3418         if (pre_init)
3419         {
3420             int j;
3421             for (j = 0; zurl_in_use[j]; j++)
3422             {
3423                 Yaz_ProxyClient *c;
3424                 int spare = 0;
3425                 int spare_waiting = 0;
3426                 int in_use = 0;
3427                 int other = 0;
3428                 for (c = m_clientPool; c; c = c->m_next)
3429                 {
3430                     if (!strcmp(zurl_in_use[j], c->get_hostname()))
3431                     {
3432                         if (c->m_cookie == 0)
3433                         {
3434                             if (c->m_server == 0)
3435                                 if (c->m_waiting)
3436                                     spare_waiting++;
3437                                 else
3438                                     spare++;
3439                             else
3440                                 in_use++;
3441                         }
3442                         else
3443                             other++;
3444                     }
3445                 }
3446                 yaz_log(YLOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
3447                         "sparew=%d preinit=%d",m_session_str,
3448                         name, zurl_in_use[j], in_use, other,
3449                         spare, spare_waiting, pre_init);
3450                 if (spare + spare_waiting < pre_init)
3451                 {
3452                     c = new Yaz_ProxyClient(m_PDU_Observable->clone(), this);
3453                     c->m_next = m_clientPool;
3454                     if (c->m_next)
3455                         c->m_next->m_prev = &c->m_next;
3456                     m_clientPool = c;
3457                     c->m_prev = &m_clientPool;
3458
3459                     if (m_log_mask & PROXY_LOG_APDU_SERVER)
3460                         c->set_APDU_yazlog(1);
3461                     else
3462                         c->set_APDU_yazlog(0);
3463
3464                     if (c->client(zurl_in_use[j]))
3465                     {
3466                         timeout(60);
3467                         delete c;
3468                         return;
3469                     }
3470                     c->timeout(30);
3471                     c->m_waiting = 1;
3472                     c->m_target_idletime = target_idletime;
3473                     c->m_seqno = m_seqno++;
3474                 }
3475             }
3476         }
3477     }
3478 }
3479
3480 void Yaz_Proxy::timeoutNotify()
3481 {
3482     if (m_parent)
3483     {
3484         GDU *gdu;
3485         switch(m_timeout_mode)
3486         {
3487         case timeout_normal:
3488         case timeout_busy:
3489             inc_request_no();
3490             m_in_queue.clear();
3491             yaz_log (YLOG_LOG, "%sTimeout (client to proxy)", m_session_str);
3492             dec_ref(true);
3493             break;
3494         case timeout_reduce:
3495             timeout(m_client_idletime);
3496             m_timeout_mode = timeout_busy;
3497             gdu = m_timeout_gdu;
3498             m_timeout_gdu = 0;
3499             recv_GDU_normal(gdu);
3500             break;
3501         case timeout_xsl:
3502             assert(m_stylesheet_nprl);
3503             convert_xsl_delay();
3504             recv_GDU_more(true);
3505         }
3506     }
3507     else
3508     {
3509         timeout(600);
3510         pre_init();
3511     }
3512 }
3513
3514 void Yaz_Proxy::markInvalid()
3515 {
3516     m_client = 0;
3517     m_flag_invalid_session = 1;
3518 }
3519
3520 void Yaz_ProxyClient::timeoutNotify()
3521 {
3522     if (m_server)
3523         m_server->inc_request_no();
3524
3525     yaz_log (YLOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
3526              get_hostname());
3527
3528     if (m_server)
3529         m_server->send_response_fail_client(get_hostname());
3530
3531     Yaz_Proxy *proxy_root = m_root;
3532
3533     shutdown();
3534
3535     proxy_root->pre_init();
3536 }
3537
3538 Yaz_ProxyClient::Yaz_ProxyClient(IPDU_Observable *the_PDU_Observable,
3539                                  Yaz_Proxy *parent) :
3540     Z_Assoc (the_PDU_Observable)
3541 {
3542     m_cookie = 0;
3543     m_next = 0;
3544     m_prev = 0;
3545     m_init_flag = 0;
3546     m_last_query = 0;
3547     m_last_resultSetId = 0;
3548     m_last_resultCount = 0;
3549     m_last_ok = 0;
3550     m_sr_transform = 0;
3551     m_waiting = 0;
3552     m_init_odr = odr_createmem (ODR_DECODE);
3553     m_initResponse = 0;
3554     m_initResponse_options = 0;
3555     m_initResponse_version = 0;
3556     m_initResponse_preferredMessageSize = 0;
3557     m_initResponse_maximumRecordSize = 0;
3558     m_resultSetStartPoint = 0;
3559     m_bytes_sent = m_bytes_recv = 0;
3560     m_pdu_recv = 0;
3561     m_server = 0;
3562     m_seqno = 0;
3563     m_target_idletime = 600;
3564     m_root = parent;
3565     m_idAuthentication_odr = odr_createmem(ODR_ENCODE);
3566     m_idAuthentication_ber_buf = 0;
3567     m_idAuthentication_ber_size = 0;
3568 }
3569
3570 const char *Yaz_Proxy::option(const char *name, const char *value)
3571 {
3572     if (!strcmp (name, "optimize")) {
3573         if (value) {
3574             xfree (m_optimize);
3575             m_optimize = xstrdup (value);
3576         }
3577         return m_optimize;
3578     }
3579     return 0;
3580 }
3581
3582 void Yaz_ProxyClient::recv_HTTP_response(Z_HTTP_Response *apdu, int len)
3583 {
3584
3585 }
3586
3587 void Yaz_ProxyClient::recv_GDU(Z_GDU *apdu, int len)
3588 {
3589     if (apdu->which == Z_GDU_Z3950)
3590         recv_Z_PDU(apdu->u.z3950, len);
3591     else if (apdu->which == Z_GDU_HTTP_Response)
3592         recv_HTTP_response(apdu->u.HTTP_Response, len);
3593     else
3594         shutdown();
3595 }
3596
3597 int Yaz_Proxy::handle_init_response_for_invalid_session(Z_APDU *apdu)
3598 {
3599     if (!m_flag_invalid_session)
3600         return 0;
3601     m_flag_invalid_session = 0;
3602     handle_incoming_Z_PDU(m_apdu_invalid_session);
3603     assert (m_mem_invalid_session);
3604     nmem_destroy(m_mem_invalid_session);
3605     m_mem_invalid_session = 0;
3606     return 1;
3607 }
3608
3609 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
3610 {
3611     m_bytes_recv += len;
3612
3613     m_pdu_recv++;
3614     m_waiting = 0;
3615     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
3616         yaz_log (YLOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
3617                  apdu_name(apdu), get_hostname(), len);
3618     if (apdu->which == Z_APDU_initResponse)
3619     {
3620         if (!m_server)  // if this is a pre init session , check for more
3621             m_root->pre_init();
3622         NMEM nmem = odr_extract_mem (odr_decode());
3623         odr_reset (m_init_odr);
3624         nmem_transfer (m_init_odr->mem, nmem);
3625         m_initResponse = apdu;
3626         m_initResponse_options = apdu->u.initResponse->options;
3627         m_initResponse_version = apdu->u.initResponse->protocolVersion;
3628         m_initResponse_preferredMessageSize =
3629             *apdu->u.initResponse->preferredMessageSize;
3630         m_initResponse_maximumRecordSize =
3631             *apdu->u.initResponse->maximumRecordSize;
3632
3633         Z_InitResponse *ir = apdu->u.initResponse;
3634
3635         // apply YAZ Proxy version
3636         char *imv0 = ir->implementationVersion;
3637         char *imv1 = (char*)
3638             odr_malloc(m_init_odr, 20 + (imv0 ? strlen(imv0) : 0));
3639         *imv1 = '\0';
3640         if (imv0)
3641             strcat(imv1, imv0);
3642         strcat(imv1, "/" VERSION);
3643         ir->implementationVersion = imv1;
3644
3645         // apply YAZ Proxy implementation name
3646         char *im0 = ir->implementationName;
3647         char *im1 = (char*)
3648             odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
3649         *im1 = '\0';
3650         if (im0)
3651         {
3652             strcat(im1, im0);
3653             strcat(im1, " ");
3654         }
3655         strcat(im1, "(YAZ Proxy)");
3656         ir->implementationName = im1;
3657
3658         nmem_destroy (nmem);
3659
3660         if (m_server && m_server->handle_init_response_for_invalid_session(apdu))
3661             return;
3662     }
3663     if (apdu->which == Z_APDU_searchResponse)
3664     {
3665         Z_SearchResponse *sr = apdu->u.searchResponse;
3666         m_last_resultCount = *sr->resultCount;
3667         int status = *sr->searchStatus;
3668         if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
3669         {
3670             m_last_ok = 1;
3671
3672             if (sr->records && sr->records->which == Z_Records_DBOSD)
3673             {
3674                 m_cache.add(odr_decode(),
3675                             sr->records->u.databaseOrSurDiagnostics, 1,
3676                             *sr->resultCount);
3677             }
3678         }
3679     }
3680     if (apdu->which == Z_APDU_presentResponse)
3681     {
3682         Z_PresentResponse *pr = apdu->u.presentResponse;
3683         if (m_sr_transform)
3684         {
3685             m_sr_transform = 0;
3686             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
3687             Z_SearchResponse *sr = new_apdu->u.searchResponse;
3688             sr->referenceId = pr->referenceId;
3689             *sr->resultCount = m_last_resultCount;
3690             sr->records = pr->records;
3691             sr->nextResultSetPosition = pr->nextResultSetPosition;
3692             sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
3693             apdu = new_apdu;
3694         }
3695         if (pr->records &&
3696             pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
3697         {
3698             m_cache.add(odr_decode(),
3699                         pr->records->u.databaseOrSurDiagnostics,
3700                         m_resultSetStartPoint, -1);
3701             m_resultSetStartPoint = 0;
3702         }
3703     }
3704     if (m_cookie)
3705         set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
3706
3707     Yaz_Proxy *server = m_server; // save it. send_to_client may destroy us
3708
3709     if (server)
3710         server->send_to_client(apdu);
3711     if (apdu->which == Z_APDU_close)
3712         shutdown();
3713     else if (server)
3714         server->recv_GDU_more(true);
3715 }
3716
3717 void Yaz_Proxy::low_socket_close()
3718 {
3719 #if WIN32
3720 #else
3721     int i;
3722     for (i = 0; i<NO_SPARE_SOLARIS_FD; i++)
3723         if  (m_lo_fd[i] >= 0)
3724             ::close(m_lo_fd[i]);
3725 #endif
3726 }
3727
3728 void Yaz_Proxy::low_socket_open()
3729 {
3730 #if WIN32
3731 #else
3732     int i;
3733     for (i = 0; i<NO_SPARE_SOLARIS_FD; i++)
3734         m_lo_fd[i] = open("/dev/null", O_RDONLY);
3735 #endif
3736 }
3737
3738 int Yaz_Proxy::server(const char *addr)
3739 {
3740     int r = Z_Assoc::server(addr);
3741     if (!r)
3742     {
3743         yaz_log(YLOG_LOG, "%sStarted proxy "
3744 #ifdef VERSION
3745             VERSION
3746 #endif
3747             " on %s", m_session_str, addr);
3748         timeout(1);
3749     }
3750     return r;
3751 }
3752
3753 void Yaz_Proxy::base64_decode(const char *base64, char *buf, int buf_len)
3754 {
3755     const char *base64_chars =
3756         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
3757     int len = strlen(base64);
3758     int buf_pos = 0;
3759     int index = 1;
3760
3761     for (int pos = 0; pos <= len; pos++)
3762     {
3763         if (base64[pos] == '=' || buf_pos + 1 >= buf_len)
3764             break;
3765
3766         const char *ch_ptr = strchr(base64_chars, base64[pos]);
3767         if (!ch_ptr)
3768             break;
3769         char ch = (char) (ch_ptr - base64_chars);
3770         switch (index)
3771         {
3772             case 1:
3773                 buf[buf_pos] = ch << 2;
3774                 break;
3775             case 2:
3776                 buf[buf_pos++] += (ch & 0x30) >> 4;
3777                 buf[buf_pos] = (ch & 0x0f) << 4;
3778                 break;
3779             case 3:
3780                 buf[buf_pos++] += (ch & 0x3c) >> 2;
3781                 buf[buf_pos] = (ch & 0x03) << 6;
3782                 break;
3783             case 4:
3784                 buf[buf_pos++] += ch;
3785         }
3786         if (index < 4)
3787             index++;
3788         else
3789             index = 1;
3790     }
3791     buf[buf_pos] = '\0';
3792 }
3793
3794 /*
3795  * Local variables:
3796  * c-basic-offset: 4
3797  * indent-tabs-mode: nil
3798  * End:
3799  * vim: shiftwidth=4 tabstop=8 expandtab
3800  */
3801