src/yaz-proxy.cpp

   1 /* This file is part of YAZ proxy
   2    Copyright (C) 1998-2011 Index Data
   3
   4 YAZ proxy is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 YAZ proxy is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18
  19 #ifdef WIN32
  20 #define HAVE_SYS_STAT_H 1
  21 #define HAVE_SYS_TYPES_H 1
  22 #endif
  23
  24 #if HAVE_UNISTD_H
  25 #include <unistd.h>
  26 #endif
  27 #if HAVE_SYS_TIME_H
  28 #include <sys/time.h>
  29 #endif
  30 #if HAVE_SYS_TYPES_H
  31 #include <sys/types.h>
  32 #endif
  33 #if HAVE_SYS_STAT_H
  34 #include <sys/stat.h>
  35 #endif
  36
  37 #include <assert.h>
  38 #include <stdlib.h>
  39 #include <time.h>
  40 #include <fcntl.h>
  41
  42 #include <yaz/srw.h>
  43 #include <yaz/marcdisp.h>
  44 #include <yaz/yaz-iconv.h>
  45 #include <yaz/log.h>
  46 #include <yaz/diagbib1.h>
  47 #include "proxyp.h"
  48 #include <yaz/pquery.h>
  49 #include <yaz/otherinfo.h>
  50 #include <yaz/charneg.h>
  51 #include <yaz/oid_db.h>
  52 #include "msg-thread.h"
  53
  54 #if YAZ_VERSIONL >= 0x03001D
  55 #define YAZ_HAS_MK_SURROGATE 1
  56 #else
  57 #define YAZ_HAS_MK_SURROGATE 0
  58 #endif
  59
  60 using namespace yazpp_1;
  61
  62 #ifdef WIN32
  63 #define strncasecmp _strnicmp
  64 #endif
  65
  66 class YAZ_EXPORT Auth_Msg : public IMsg_Thread {
  67 public:
  68     int m_ret;
  69     IMsg_Thread *handle();
  70     void result();
  71     Yaz_Proxy *m_proxy;
  72     NMEM m_nmem;
  73     char *m_apdu_buf;
  74     int m_apdu_len;
  75     Auth_Msg();
  76     virtual ~Auth_Msg();
  77 };
  78
  79 Auth_Msg::Auth_Msg()
  80 {
  81     m_nmem = nmem_create();
  82 }
  83
  84 Auth_Msg::~Auth_Msg()
  85 {
  86     nmem_destroy(m_nmem);
  87 }
  88
  89 IMsg_Thread *Auth_Msg::handle()
  90 {
  91     ODR decode = odr_createmem(ODR_DECODE);
  92     Z_APDU *apdu;
  93
  94     odr_setbuf(decode, m_apdu_buf, m_apdu_len, 0);
  95     int r = z_APDU(decode, &apdu, 0, 0);
  96     if (!r)
  97     {
  98         yaz_log(YLOG_WARN, "decode failed in Auth_Msg::handle");
  99     }
 100     else
 101     {
 102         m_ret = m_proxy->handle_authentication(apdu);
 103     }
 104     odr_destroy(decode);
 105     return this;
 106 }
 107
 108 void Auth_Msg::result()
 109 {
 110     if (m_proxy->dec_ref())
 111     {
 112         yaz_log(YLOG_LOG, "Auth_Msg::proxy deleted meanwhile");
 113     }
 114     else
 115     {
 116         odr_setbuf(m_proxy->odr_decode(), m_apdu_buf, m_apdu_len, 0);
 117         Z_APDU *apdu = 0;
 118         int r = z_APDU(m_proxy->odr_decode(), &apdu, 0, 0);
 119         if (!r)
 120             yaz_log(YLOG_LOG, "Auth_Msg::result z_APDU failed");
 121         m_proxy->result_authentication(apdu, m_ret);
 122     }
 123     delete this;
 124 }
 125
 126 void Yaz_Proxy::result_authentication(Z_APDU *apdu, int ret)
 127 {
 128     if (apdu == 0 || ret == 0)
 129     {
 130         Z_APDU *apdu_reject = zget_APDU(odr_encode(), Z_APDU_initResponse);
 131         *apdu_reject->u.initResponse->result = 0;
 132         send_to_client(apdu_reject);
 133         dec_ref();
 134     }
 135     else
 136     {
 137         if (apdu->which == Z_APDU_initRequest)
 138         {
 139             Yaz_ProxyConfig *cfg = check_reconfigure();
 140             if (cfg)
 141                 cfg->target_authentication(m_default_target, odr_encode(),
 142                                            apdu->u.initRequest);
 143         }
 144         handle_incoming_Z_PDU_2(apdu);
 145     }
 146 }
 147
 148 static const char *apdu_name(Z_APDU *apdu)
 149 {
 150     switch (apdu->which)
 151     {
 152     case Z_APDU_initRequest:
 153         return "initRequest";
 154     case Z_APDU_initResponse:
 155         return "initResponse";
 156     case Z_APDU_searchRequest:
 157         return "searchRequest";
 158     case Z_APDU_searchResponse:
 159         return "searchResponse";
 160     case Z_APDU_presentRequest:
 161         return "presentRequest";
 162     case Z_APDU_presentResponse:
 163         return "presentResponse";
 164     case Z_APDU_deleteResultSetRequest:
 165         return "deleteResultSetRequest";
 166     case Z_APDU_deleteResultSetResponse:
 167         return "deleteResultSetResponse";
 168     case Z_APDU_scanRequest:
 169         return "scanRequest";
 170     case Z_APDU_scanResponse:
 171         return "scanResponse";
 172     case Z_APDU_sortRequest:
 173         return "sortRequest";
 174     case Z_APDU_sortResponse:
 175         return "sortResponse";
 176     case Z_APDU_extendedServicesRequest:
 177         return "extendedServicesRequest";
 178     case Z_APDU_extendedServicesResponse:
 179         return "extendedServicesResponse";
 180     case Z_APDU_close:
 181         return "close";
 182     }
 183     return "other";
 184 }
 185
 186 static const char *gdu_name(Z_GDU *gdu)
 187 {
 188     switch(gdu->which)
 189     {
 190     case Z_GDU_Z3950:
 191         return apdu_name(gdu->u.z3950);
 192     case Z_GDU_HTTP_Request:
 193         return "HTTP Request";
 194     case Z_GDU_HTTP_Response:
 195         return "HTTP Response";
 196     }
 197     return "Unknown request/response";
 198 }
 199
 200 Yaz_Proxy::Yaz_Proxy(IPDU_Observable *the_PDU_Observable,
 201                      ISocketObservable *the_socket_observable,
 202                      Yaz_Proxy *parent)
 203     :
 204     Z_Assoc(the_PDU_Observable),
 205     m_bw_stat(60), m_pdu_stat(60), m_search_stat(60)
 206 {
 207     m_PDU_Observable = the_PDU_Observable;
 208     m_socket_observable = the_socket_observable;
 209     m_client = 0;
 210     m_parent = parent;
 211     m_clientPool = 0;
 212     m_seqno = 1;
 213     m_keepalive_limit_bw = 500000;
 214     m_keepalive_limit_pdu = 1000;
 215     m_proxyTarget = 0;
 216     m_default_target = 0;
 217     m_proxy_negotiation_charset = 0;
 218     m_proxy_negotiation_lang = 0;
 219     m_proxy_negotiation_default_charset = 0;
 220     m_charset_converter = new Yaz_CharsetConverter;
 221     m_max_clients = 150;
 222     m_log_mask = 0;
 223     m_seed = time(0);
 224     m_client_idletime = 600;
 225     m_target_idletime = 600;
 226     m_max_sockets = 1024;
 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] = -1;
 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     m_num_msg_threads = 0;
 299 }
 300
 301 void Yaz_Proxy::inc_ref()
 302 {
 303     m_ref_count++;
 304 }
 305
 306 Yaz_Proxy::~Yaz_Proxy()
 307 {
 308     yaz_log(YLOG_LOG, "%sClosed %d/%d sent/recv bytes total", m_session_str,
 309             m_bytes_sent, m_bytes_recv);
 310     nmem_destroy(m_initRequest_mem);
 311     nmem_destroy(m_mem_invalid_session);
 312     nmem_destroy(m_referenceId_mem);
 313
 314     xfree(m_proxyTarget);
 315     xfree(m_default_target);
 316     xfree(m_proxy_negotiation_charset);
 317     xfree(m_proxy_negotiation_lang);
 318     xfree(m_proxy_negotiation_default_charset);
 319     delete m_charset_converter;
 320     xfree(m_optimize);
 321
 322 #if YAZ_HAVE_XSLT
 323     if (m_stylesheet_xsp)
 324         xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
 325 #endif
 326     xfree(m_time_tv);
 327
 328     xfree(m_peername);
 329     xfree(m_schema);
 330     xfree(m_backend_type);
 331     xfree(m_backend_charset);
 332     xfree(m_usemarcon_ini_stage1);
 333     xfree(m_usemarcon_ini_stage2);
 334     delete m_usemarcon;
 335     if (m_s2z_odr_init)
 336         odr_destroy(m_s2z_odr_init);
 337     if (m_s2z_odr_search)
 338         odr_destroy(m_s2z_odr_search);
 339     if (!m_parent)
 340         low_socket_close();
 341     if (!m_parent)
 342         delete m_my_thread;
 343     delete m_config;
 344 }
 345
 346 void Yaz_Proxy::set_debug_mode(int mode)
 347 {
 348     m_debug_mode = mode;
 349 }
 350
 351 int Yaz_Proxy::set_config(const char *config)
 352 {
 353     delete m_config;
 354     m_config = new Yaz_ProxyConfig();
 355     xfree(m_config_fname);
 356     m_config_fname = xstrdup(config);
 357     int r = m_config->read_xml(config);
 358     if (!r)
 359     {
 360         int period = 60;
 361         m_config->get_generic_info(&m_log_mask, &m_max_clients,
 362                                    &m_max_connect, &m_limit_connect, &period,
 363                                    &m_num_msg_threads);
 364         m_connect.set_period(period);
 365     }
 366     return r;
 367 }
 368
 369 void Yaz_Proxy::set_default_target(const char *target)
 370 {
 371     xfree(m_default_target);
 372     m_default_target = 0;
 373     if (target)
 374         m_default_target = (char *) xstrdup(target);
 375 }
 376
 377 void Yaz_Proxy::set_proxy_negotiation(const char *charset, const char *lang,
 378                                        const char *default_charset)
 379 {
 380     yaz_log(YLOG_DEBUG, "%sSet the proxy negotiation: charset to '%s', "
 381         "default charset to '%s', language to '%s'", m_session_str,
 382         charset?charset:"none",
 383         default_charset?default_charset:"none",
 384         lang?lang:"none");
 385     xfree(m_proxy_negotiation_charset);
 386     xfree(m_proxy_negotiation_lang);
 387     m_proxy_negotiation_charset = m_proxy_negotiation_lang = 0;
 388     if (charset)
 389         m_proxy_negotiation_charset = (char *) xstrdup(charset);
 390     if (lang)
 391         m_proxy_negotiation_lang = (char *) xstrdup(lang);
 392     if (default_charset)
 393         m_proxy_negotiation_default_charset =
 394             (char *) xstrdup(default_charset);
 395 }
 396
 397 Yaz_ProxyConfig *Yaz_Proxy::check_reconfigure()
 398 {
 399     if (m_parent)
 400         return m_parent->check_reconfigure();
 401
 402     Yaz_ProxyConfig *cfg = m_config;
 403     if (m_reconfig_flag)
 404     {
 405         yaz_log(YLOG_LOG, "reconfigure");
 406         if (m_config_fname && cfg)
 407         {
 408             yaz_log(YLOG_LOG, "reconfigure config %s", m_config_fname);
 409             int r = cfg->read_xml(m_config_fname);
 410             if (r)
 411                 yaz_log(YLOG_WARN, "reconfigure failed");
 412             else
 413             {
 414                 m_log_mask = 0;
 415                 int period = 60;
 416                 cfg->get_generic_info(&m_log_mask, &m_max_clients,
 417                                       &m_max_connect, &m_limit_connect,
 418                                       &period, &m_num_msg_threads);
 419                 m_connect.set_period(period);
 420             }
 421         }
 422         else
 423             yaz_log(YLOG_LOG, "reconfigure");
 424         m_reconfig_flag = 0;
 425     }
 426     return cfg;
 427 }
 428
 429 IPDU_Observer *Yaz_Proxy::sessionNotify(IPDU_Observable
 430                                         *the_PDU_Observable, int fd)
 431 {
 432     check_reconfigure();
 433
 434     char session_str[200];
 435     const char *peername = the_PDU_Observable->getpeername();
 436     if (!peername)
 437         peername = "nullpeer";
 438
 439     if (m_log_mask & PROXY_LOG_IP_CLIENT)
 440         sprintf(session_str, "%ld:%d %.80s %d ",
 441                 (long) time(0), m_session_no, peername, 0);
 442     else
 443         sprintf(session_str, "%ld:%d %d ",
 444                 (long) time(0), m_session_no, 0);
 445     m_session_no++;
 446
 447     yaz_log(YLOG_LOG, "%sNew session %s", session_str, peername);
 448
 449     Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable,
 450                                          m_socket_observable, this);
 451
 452     new_proxy->m_config = 0;
 453     new_proxy->m_config_fname = 0;
 454     new_proxy->timeout(m_client_idletime);
 455     new_proxy->m_target_idletime = m_target_idletime;
 456     new_proxy->set_default_target(m_default_target);
 457     new_proxy->m_max_clients = m_max_clients;
 458     new_proxy->m_log_mask = m_log_mask;
 459     new_proxy->m_session_no = m_session_no;
 460     new_proxy->m_num_msg_threads = m_num_msg_threads;
 461
 462 #if 0
 463     // in case we want to watch a particular client..
 464     if (!strcmp(peername, "tcp:163.121.19.82")) // NIS GROUP
 465         new_proxy->m_log_mask = 255;
 466 #endif
 467
 468     new_proxy->set_APDU_log(get_APDU_log());
 469     if (new_proxy->m_log_mask & PROXY_LOG_APDU_CLIENT)
 470         new_proxy->set_APDU_yazlog(1);
 471     else
 472         new_proxy->set_APDU_yazlog(0);
 473     strcpy(new_proxy->m_session_str, session_str);
 474     new_proxy->m_peername = xstrdup(peername);
 475     new_proxy->set_proxy_negotiation(m_proxy_negotiation_charset,
 476         m_proxy_negotiation_lang, m_proxy_negotiation_default_charset);
 477     // create thread object the first time we get an incoming connection
 478     if (!m_my_thread && m_num_msg_threads > 0)
 479     {
 480         yaz_log(YLOG_LOG, "%sStarting message thread management. number=%d",
 481                  session_str, m_num_msg_threads);
 482         m_my_thread = new Msg_Thread(m_socket_observable, m_num_msg_threads);
 483     }
 484     new_proxy->m_my_thread = m_my_thread;
 485     return new_proxy;
 486 }
 487
 488 char *Yaz_Proxy::get_cookie(Z_OtherInformation **otherInfo)
 489 {
 490     Z_OtherInformationUnit *oi =
 491         update_otherInformation(otherInfo, 0, yaz_oid_userinfo_cookie, 1, 1);
 492
 493     if (oi && oi->which == Z_OtherInfo_characterInfo)
 494         return oi->information.characterInfo;
 495     return 0;
 496 }
 497
 498 char *Yaz_Proxy::get_proxy(Z_OtherInformation **otherInfo)
 499 {
 500     Z_OtherInformationUnit *oi =
 501         update_otherInformation(otherInfo, 0, yaz_oid_userinfo_proxy, 1, 1);
 502
 503     if (oi && oi->which == Z_OtherInfo_characterInfo)
 504         return oi->information.characterInfo;
 505     return 0;
 506 }
 507 const char *Yaz_Proxy::load_balance(const char **url)
 508 {
 509     int zurl_in_use[MAX_ZURL_PLEX];
 510     int zurl_in_spare[MAX_ZURL_PLEX];
 511     Yaz_ProxyClient *c;
 512     int i;
 513
 514     for (i = 0; i<MAX_ZURL_PLEX; i++)
 515     {
 516         zurl_in_use[i] = 0;
 517         zurl_in_spare[i] = 0;
 518     }
 519     for (c = m_parent->m_clientPool; c; c = c->m_next)
 520     {
 521         for (i = 0; url[i]; i++)
 522             if (!strcmp(url[i], c->get_hostname()))
 523             {
 524                 zurl_in_use[i]++;
 525                 if (c->m_cookie == 0 && c->m_server == 0 && c->m_waiting == 0)
 526                     zurl_in_spare[i]++;
 527             }
 528     }
 529     int min_use = 100000;
 530     int spare_for_min = 0;
 531     int max_spare = 0;
 532     const char *ret_min = 0;
 533     const char *ret_spare = 0;
 534     for (i = 0; url[i]; i++)
 535     {
 536         yaz_log(YLOG_DEBUG, "%szurl=%s use=%d spare=%d",
 537                 m_session_str, url[i], zurl_in_use[i], zurl_in_spare[i]);
 538         if (min_use > zurl_in_use[i])
 539         {
 540             ret_min = url[i];
 541             min_use = zurl_in_use[i];
 542             spare_for_min = zurl_in_spare[i];
 543         }
 544         if (max_spare < zurl_in_spare[i])
 545         {
 546             ret_spare = url[i];
 547             max_spare = zurl_in_spare[i];
 548         }
 549     }
 550     return ret_min;
 551 }
 552
 553 int Yaz_Proxy::get_number_of_connections()
 554 {
 555     int no_connections = 0;
 556     Yaz_ProxyClient *c;
 557
 558     for (c = m_parent->m_clientPool; c; c = c->m_next)
 559     {
 560         assert(c->m_prev);
 561         assert(*c->m_prev == c);
 562         if (!strcmp(m_proxyTarget, c->get_hostname()))
 563         {
 564             no_connections++;
 565         }
 566     }
 567     yaz_log(YLOG_LOG, "%sExisting %s connections: %d", m_session_str, m_proxyTarget,
 568         no_connections);
 569     return no_connections;
 570 }
 571
 572 Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
 573                                        const char *proxy_host, int *http_code)
 574 {
 575     assert(m_parent);
 576     Yaz_Proxy *parent = m_parent;
 577     Yaz_ProxyClient *c = m_client;
 578
 579     if (!m_proxyTarget)
 580     {
 581         const char *url[MAX_ZURL_PLEX];
 582         Yaz_ProxyConfig *cfg = check_reconfigure();
 583         if (proxy_host)
 584         {
 585             if (parent && parent->m_debug_mode)
 586             {
 587                 // only to be enabled for debugging...
 588                 if (!strcmp(proxy_host, "stop"))
 589                     exit(0);
 590             }
 591             xfree(m_default_target);
 592             m_default_target = xstrdup(proxy_host);
 593         }
 594         proxy_host = m_default_target;
 595         int client_idletime = -1;
 596         const char *cql2rpn_fname = 0;
 597         const char *negotiation_charset = 0;
 598         const char *negotiation_lang = 0;
 599         const char *query_charset = 0;
 600         const char *default_client_query_charset = 0;
 601         url[0] = m_default_target;
 602         url[1] = 0;
 603         if (cfg)
 604         {
 605             int pre_init = 0;
 606             cfg->get_target_info(proxy_host, url, &m_bw_max,
 607                                  &m_pdu_max, &m_max_record_retrieve,
 608                                  &m_search_max,
 609                                  &m_target_idletime, &client_idletime,
 610                                  &m_max_sockets,
 611                                  &parent->m_max_clients,
 612                                  &m_keepalive_limit_bw,
 613                                  &m_keepalive_limit_pdu,
 614                                  &pre_init,
 615                                  &cql2rpn_fname,
 616                                  &negotiation_charset,
 617                                  &negotiation_lang,
 618                                  &query_charset,
 619                                  &default_client_query_charset);
 620         }
 621         if (client_idletime != -1)
 622         {
 623             m_client_idletime = client_idletime;
 624             timeout(m_client_idletime);
 625         }
 626
 627         // get those FILE descriptors available
 628         m_parent->low_socket_close();
 629         if (cql2rpn_fname)
 630             m_cql2rpn.set_pqf_file(cql2rpn_fname);
 631         // reserve them again
 632         m_parent->low_socket_open();
 633
 634         if (negotiation_charset || negotiation_lang || default_client_query_charset)
 635         {
 636             set_proxy_negotiation(negotiation_charset,
 637                 negotiation_lang, default_client_query_charset);
 638         }
 639         m_charset_converter->set_target_query_charset(query_charset);
 640         if (!url[0])
 641         {
 642             yaz_log(YLOG_LOG, "%sNo default target", m_session_str);
 643             return 0;
 644         }
 645         // we don't handle multiplexing for cookie session, so we just
 646         // pick the first one in this case (anonymous users will be able
 647         // to use any backend)
 648         if (cookie && *cookie)
 649             m_proxyTarget = (char*) xstrdup(url[0]);
 650         else
 651             m_proxyTarget = (char*) xstrdup(load_balance(url));
 652     }
 653     if (cookie && *cookie)
 654     {   // search in sessions with a cookie
 655         for (c = parent->m_clientPool; c; c = c->m_next)
 656         {
 657             assert(c->m_prev);
 658             assert(*c->m_prev == c);
 659             if (c->m_cookie && !strcmp(cookie,c->m_cookie) &&
 660                 !strcmp(m_proxyTarget, c->get_hostname()))
 661             {
 662                 // Found it in cache
 663                 // The following handles "cancel"
 664                 // If connection is busy (waiting for PDU) and
 665                 // we have an initRequest we can safely do re-open
 666                 if (c->m_waiting && apdu->which == Z_APDU_initRequest)
 667                 {
 668                     yaz_log(YLOG_LOG, "%s REOPEN target=%s", m_session_str,
 669                              c->get_hostname());
 670                     c->close();
 671                     c->m_init_flag = 0;
 672
 673                     c->m_last_ok = 0;
 674                     c->m_cache.clear();
 675                     c->m_last_resultCount = 0;
 676                     c->m_sr_transform = 0;
 677                     c->m_waiting = 0;
 678                     c->m_resultSetStartPoint = 0;
 679                     c->m_target_idletime = m_target_idletime;
 680                     if (c->client(m_proxyTarget))
 681                     {
 682                         delete c;
 683                         return 0;
 684                     }
 685                     c->timeout(30);
 686                 }
 687                 c->m_seqno = parent->m_seqno;
 688                 if (c->m_server && c->m_server != this)
 689                     c->m_server->m_client = 0;
 690                 c->m_server = this;
 691                 (parent->m_seqno)++;
 692                 yaz_log(YLOG_DEBUG, "get_client 1 %p %p", this, c);
 693                 return c;
 694             }
 695         }
 696     }
 697     else if (!c && apdu->which == Z_APDU_initRequest )
 698     {
 699         // anonymous sessions without cookie.
 700         // if authentication is set it is NOT anonymous se we can't share them.
 701         // If charset and lang negotiation is use it is NOT anonymous session too.
 702         for (c = parent->m_clientPool; c; c = c->m_next)
 703         {
 704             assert(c->m_prev);
 705             assert(*c->m_prev == c);
 706             if (c->m_server == 0 && c->m_cookie == 0 && c->m_waiting == 0
 707                 && c->compare_idAuthentication(apdu)
 708                 && c->compare_charset(apdu)
 709                 && !strcmp(m_proxyTarget, c->get_hostname()))
 710             {
 711                 // found it in cache
 712                 yaz_log(YLOG_LOG, "%sREUSE %d %s",
 713                          m_session_str, parent->m_seqno, c->get_hostname());
 714
 715                 c->m_seqno = parent->m_seqno;
 716                 assert(c->m_server == 0);
 717                 c->m_server = this;
 718
 719                 if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 720                     c->set_APDU_yazlog(1);
 721                 else
 722                     c->set_APDU_yazlog(0);
 723
 724                 (parent->m_seqno)++;
 725
 726                 parent->pre_init();
 727
 728                 return c;
 729             }
 730         }
 731     }
 732     if (!m_client)
 733     {
 734         if (apdu->which != Z_APDU_initRequest)
 735         {
 736             yaz_log(YLOG_LOG, "%sno init request as first PDU", m_session_str);
 737             *http_code = 500;
 738             return 0;
 739         }
 740
 741         int no_in_use = get_number_of_connections();
 742         if (no_in_use >= m_max_sockets)
 743         {
 744             yaz_log(YLOG_LOG, "%smax sockets reached %d", m_session_str,
 745                 m_max_sockets);
 746             *http_code = 500;
 747             return 0;
 748         }
 749         // go through list of clients - and find the lowest/oldest one.
 750         Yaz_ProxyClient *c_min = 0;
 751         int min_seq = -1;
 752         int no_of_clients = 0;
 753         if (parent->m_clientPool)
 754             yaz_log(YLOG_DEBUG, "Existing sessions");
 755         for (c = parent->m_clientPool; c; c = c->m_next)
 756         {
 757             yaz_log(YLOG_DEBUG, " Session %-3d wait=%d %s cookie=%s", c->m_seqno,
 758                                c->m_waiting, c->get_hostname(),
 759                                c->m_cookie ? c->m_cookie : "");
 760             no_of_clients++;
 761             if (min_seq < 0 || c->m_seqno < min_seq)
 762             {
 763                 min_seq = c->m_seqno;
 764                 c_min = c;
 765             }
 766         }
 767         if (no_of_clients >= parent->m_max_clients)
 768         {
 769             c = c_min;
 770             if (c->m_waiting || strcmp(m_proxyTarget, c->get_hostname()))
 771             {
 772                 yaz_log(YLOG_LOG, "%sMAXCLIENTS %d Destroy %d",
 773                          m_session_str, parent->m_max_clients, c->m_seqno);
 774                 if (c->m_server && c->m_server != this)
 775                     c->m_server->dec_ref();
 776             }
 777             else
 778             {
 779                 yaz_log(YLOG_LOG, "%sMAXCLIENTS %d Reuse %d %d %s",
 780                          m_session_str, parent->m_max_clients,
 781                          c->m_seqno, parent->m_seqno, c->get_hostname());
 782                 xfree(c->m_cookie);
 783                 c->m_cookie = 0;
 784                 if (cookie)
 785                     c->m_cookie = xstrdup(cookie);
 786                 c->m_seqno = parent->m_seqno;
 787                 if (c->m_server && c->m_server != this)
 788                 {
 789                     c->m_server->m_client = 0;
 790                     c->m_server->dec_ref();
 791                 }
 792                 (parent->m_seqno)++;
 793                 c->m_target_idletime = m_target_idletime;
 794                 c->timeout(m_target_idletime);
 795
 796                 if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 797                     c->set_APDU_yazlog(1);
 798                 else
 799                     c->set_APDU_yazlog(0);
 800
 801                 return c;
 802             }
 803         }
 804         else
 805         {
 806
 807             yaz_log(YLOG_LOG, "%sNEW %d %s",
 808                      m_session_str, parent->m_seqno, m_proxyTarget);
 809             c = new Yaz_ProxyClient(m_PDU_Observable->clone(), parent);
 810             c->m_next = parent->m_clientPool;
 811             if (c->m_next)
 812                 c->m_next->m_prev = &c->m_next;
 813             parent->m_clientPool = c;
 814             c->m_prev = &parent->m_clientPool;
 815         }
 816
 817         xfree(c->m_cookie);
 818         c->m_cookie = 0;
 819         if (cookie)
 820             c->m_cookie = xstrdup(cookie);
 821
 822         c->m_seqno = parent->m_seqno;
 823         c->m_init_flag = 0;
 824         c->m_last_resultCount = 0;
 825         c->m_last_ok = 0;
 826         c->m_cache.clear();
 827         c->m_sr_transform = 0;
 828         c->m_waiting = 0;
 829         c->m_resultSetStartPoint = 0;
 830         (parent->m_seqno)++;
 831         if (c->client(m_proxyTarget))
 832         {
 833             delete c;
 834             return 0;
 835         }
 836         c->m_target_idletime = m_target_idletime;
 837         c->timeout(30);
 838
 839         if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 840             c->set_APDU_yazlog(1);
 841         else
 842             c->set_APDU_yazlog(0);
 843
 844         c->set_idAuthentication(apdu);
 845     }
 846     yaz_log(YLOG_DEBUG, "get_client 3 %p %p", this, c);
 847     return c;
 848 }
 849
 850 void Yaz_Proxy::display_diagrecs(Z_DiagRec **pp, int num)
 851 {
 852     int i;
 853     for (i = 0; i<num; i++)
 854     {
 855         Z_DefaultDiagFormat *r;
 856         Z_DiagRec *p = pp[i];
 857         if (p->which != Z_DiagRec_defaultFormat)
 858         {
 859             yaz_log(YLOG_LOG, "%sError no diagnostics", m_session_str);
 860             return;
 861         }
 862         else
 863             r = p->u.defaultFormat;
 864         switch (r->which)
 865         {
 866         case Z_DefaultDiagFormat_v2Addinfo:
 867             yaz_log(YLOG_LOG, "%sError " ODR_INT_PRINTF " %s:%s",
 868                     m_session_str,
 869                     *r->condition, diagbib1_str(*r->condition),
 870                     r->u.v2Addinfo);
 871             break;
 872         case Z_DefaultDiagFormat_v3Addinfo:
 873             yaz_log(YLOG_LOG, "%sError " ODR_INT_PRINTF " %s:%s",
 874                     m_session_str,
 875                     *r->condition, diagbib1_str(*r->condition),
 876                     r->u.v3Addinfo);
 877             break;
 878         }
 879     }
 880 }
 881
 882 int Yaz_Proxy::convert_xsl(Z_NamePlusRecordList *p, Z_APDU *apdu)
 883 {
 884     if (!m_stylesheet_xsp || p->num_records <= 0)
 885     {
 886         return 0;  /* no XSLT to be done ... */
 887     }
 888
 889     m_stylesheet_offset = 0;
 890     m_stylesheet_nprl = p;
 891     m_stylesheet_apdu = apdu;
 892     m_timeout_mode = timeout_xsl;
 893
 894     timeout(0);
 895     return 1;
 896 }
 897
 898 void Yaz_Proxy::convert_xsl_delay()
 899 {
 900 #if YAZ_HAVE_XSLT
 901     Z_NamePlusRecord *npr = m_stylesheet_nprl->records[m_stylesheet_offset];
 902     if (npr->which == Z_NamePlusRecord_databaseRecord)
 903     {
 904         Z_External *r = npr->u.databaseRecord;
 905         if (r->which == Z_External_octet)
 906         {
 907 #if 0
 908             fwrite((char*) r->u.octet_aligned->buf, 1, r->u.octet_aligned->len, stdout);
 909 #endif
 910             xmlDocPtr res, doc = xmlParseMemory(
 911                 (char*) r->u.octet_aligned->buf,
 912                 r->u.octet_aligned->len);
 913
 914
 915             yaz_log(YLOG_LOG, "%sXSLT convert %d",
 916                     m_session_str, m_stylesheet_offset);
 917             res = xsltApplyStylesheet((xsltStylesheetPtr) m_stylesheet_xsp,
 918                                       doc, 0);
 919
 920             if (res)
 921             {
 922                 xmlChar *out_buf;
 923                 int out_len;
 924                 xmlDocDumpFormatMemory(res, &out_buf, &out_len, 1);
 925                 m_stylesheet_nprl->records[m_stylesheet_offset]->
 926                     u.databaseRecord =
 927                     z_ext_record_oid(odr_encode(), yaz_oid_recsyn_xml,
 928                                      (char*) out_buf, out_len);
 929                 xmlFree(out_buf);
 930                 xmlFreeDoc(res);
 931             }
 932
 933             xmlFreeDoc(doc);
 934         }
 935     }
 936 #endif
 937     m_stylesheet_offset++;
 938     if (m_stylesheet_offset == m_stylesheet_nprl->num_records)
 939     {
 940         m_timeout_mode = timeout_normal;
 941         m_stylesheet_nprl = 0;
 942 #if YAZ_HAVE_XSLT
 943         if (m_stylesheet_xsp)
 944             xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
 945 #endif
 946         m_stylesheet_xsp = 0;
 947         timeout(m_client_idletime);
 948         send_PDU_convert(m_stylesheet_apdu);
 949     }
 950     else
 951         timeout(0);
 952 }
 953
 954 void Yaz_Proxy::convert_to_frontend_type(Z_NamePlusRecordList *p)
 955 {
 956     if (m_frontend_type[0] != -1)
 957     {
 958         int i;
 959         for (i = 0; i < p->num_records; i++)
 960         {
 961             Z_NamePlusRecord *npr = p->records[i];
 962             if (npr->which == Z_NamePlusRecord_databaseRecord)
 963             {
 964                 Z_External *r = npr->u.databaseRecord;
 965                 if (r->which == Z_External_octet)
 966                 {
 967 #if !HAVE_USEMARCON
 968                     if (m_usemarcon_ini_stage1 && *m_usemarcon_ini_stage1)
 969                         yaz_log(YLOG_LOG, "%sError: USEMARCON requested but not available",
 970                             m_session_str);
 971 #endif
 972 #if HAVE_USEMARCON
 973                     yaz_log(YLOG_DEBUG, "%sUSEMARCON stage1=%s stage2=%s",
 974                         m_session_str,
 975                         m_usemarcon_ini_stage1 ? m_usemarcon_ini_stage1 : "(none)",
 976                         m_usemarcon_ini_stage2 ? m_usemarcon_ini_stage2 : "(none)");
 977                     char *converted;
 978                     int convlen;
 979                     if (m_usemarcon->convert(m_usemarcon_ini_stage1, m_usemarcon_ini_stage2,
 980                         (char*) r->u.octet_aligned->buf, r->u.octet_aligned->len,
 981                         &converted, &convlen))
 982                     {
 983                         npr->u.databaseRecord =
 984                             z_ext_record_oid(odr_encode(),
 985                                              m_frontend_type,
 986                                              converted,
 987                                              strlen(converted));
 988                         free(converted);
 989                     }
 990                     else
 991 #endif
 992 /* HAVE_USEMARCON */
 993                     npr->u.databaseRecord =
 994                         z_ext_record_oid(odr_encode(),
 995                                          m_frontend_type,
 996                                          (char*) r->u.octet_aligned->buf,
 997                                          r->u.octet_aligned->len);
 998                 }
 999             }
1000         }
1001     }
1002 }
1003
1004 void Yaz_Proxy::convert_records_charset(Z_NamePlusRecordList *p,
1005                                         const char *backend_charset)
1006 {
1007     int sel =   m_charset_converter->get_client_charset_selected();
1008     const char *client_record_charset =
1009         m_charset_converter->get_client_query_charset();
1010     if (sel && backend_charset && client_record_charset &&
1011         strcmp(backend_charset, client_record_charset))
1012     {
1013         int i;
1014         yaz_iconv_t cd = yaz_iconv_open(client_record_charset,
1015                                         backend_charset);
1016         yaz_marc_t mt = yaz_marc_create();
1017         yaz_marc_xml(mt, YAZ_MARC_ISO2709);
1018         yaz_marc_iconv(mt, cd);
1019         for (i = 0; i < p->num_records; i++)
1020         {
1021             Z_NamePlusRecord *npr = p->records[i];
1022             if (npr->which == Z_NamePlusRecord_databaseRecord)
1023             {
1024                 Z_External *r = npr->u.databaseRecord;
1025                 const Odr_oid *oid = r->direct_reference;
1026                 if (!oid)
1027                     continue;
1028
1029                 if (!oid_oidcmp(oid, yaz_oid_recsyn_sutrs))
1030                 {
1031                     WRBUF w = wrbuf_alloc();
1032
1033                     wrbuf_iconv_write(w, cd,  (char*) r->u.octet_aligned->buf,
1034                                       r->u.octet_aligned->len);
1035                     npr->u.databaseRecord =
1036                         z_ext_record_oid(odr_encode(), oid, wrbuf_buf(w),
1037                                          wrbuf_len(w));
1038                     wrbuf_destroy(w);
1039                 }
1040                 else if (!oid_oidcmp(oid, yaz_oid_recsyn_xml))
1041                 {
1042                     ;
1043                 }
1044                 else if (r->which == Z_External_octet)
1045                 {
1046                     size_t rlen;
1047                     const char *result;
1048                     if (yaz_marc_decode_buf(mt,
1049                                             (char*) r->u.octet_aligned->buf,
1050                                             r->u.octet_aligned->len,
1051                                             &result, &rlen))
1052                     {
1053                         npr->u.databaseRecord =
1054                             z_ext_record_oid(odr_encode(), oid, result, rlen);
1055                         yaz_log(YLOG_LOG, "%sRecoding MARC record",
1056                                 m_session_str);
1057                     }
1058                 }
1059             }
1060         }
1061         if (cd)
1062             yaz_iconv_close(cd);
1063         yaz_marc_destroy(mt);
1064     }
1065 }
1066
1067 void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p,
1068                                    const char *backend_charset)
1069 {
1070     int i;
1071     if (!backend_charset)
1072         backend_charset = "MARC-8";
1073     yaz_iconv_t cd = yaz_iconv_open("UTF-8", backend_charset);
1074     yaz_marc_t mt = yaz_marc_create();
1075     yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1076     yaz_marc_iconv(mt, cd);
1077     for (i = 0; i < p->num_records; i++)
1078     {
1079         Z_NamePlusRecord *npr = p->records[i];
1080         if (npr->which == Z_NamePlusRecord_databaseRecord)
1081         {
1082             Z_External *r = npr->u.databaseRecord;
1083             if (r->which == Z_External_OPAC)
1084             {
1085                 WRBUF w = wrbuf_alloc();
1086
1087                 yaz_opac_decode_wrbuf(mt, r->u.opac, w);
1088                 npr->u.databaseRecord = z_ext_record_oid(
1089                     odr_encode(), yaz_oid_recsyn_xml,
1090                     wrbuf_buf(w), wrbuf_len(w));
1091                 wrbuf_destroy(w);
1092             }
1093             else if (r->which == Z_External_octet)
1094             {
1095                 size_t rlen;
1096                 const char *result;
1097                 if (yaz_marc_decode_buf(mt, (char*) r->u.octet_aligned->buf,
1098                                         r->u.octet_aligned->len,
1099                                         &result, &rlen))
1100                 {
1101                     npr->u.databaseRecord =
1102                         z_ext_record_oid(odr_encode(), yaz_oid_recsyn_xml,
1103                                          result, rlen);
1104                 }
1105             }
1106         }
1107     }
1108     if (cd)
1109         yaz_iconv_close(cd);
1110     yaz_marc_destroy(mt);
1111 }
1112
1113 void Yaz_Proxy::logtime()
1114 {
1115 #if HAVE_GETTIMEOFDAY
1116     struct timeval *tv = (struct timeval*) m_time_tv;
1117     if (tv->tv_sec)
1118     {
1119         struct timeval tv1;
1120         gettimeofday(&tv1, 0);
1121         long diff = (tv1.tv_sec - tv->tv_sec)*1000000 +
1122             (tv1.tv_usec - tv->tv_usec);
1123         if (diff >= 0)
1124             yaz_log(YLOG_LOG, "%sElapsed %ld.%03ld", m_session_str,
1125                     diff/1000000, (diff/1000)%1000);
1126     }
1127     tv->tv_sec = 0;
1128     tv->tv_usec = 0;
1129 #endif
1130 }
1131
1132 int Yaz_Proxy::send_http_response(int code)
1133 {
1134     ODR o = odr_encode();
1135     Z_GDU *gdu = z_get_HTTP_Response(o, code);
1136     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
1137     if (m_http_version)
1138         hres->version = odr_strdup(o, m_http_version);
1139     if (m_http_keepalive)
1140         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1141     else
1142         timeout(0);
1143     if (code == 401)
1144         z_HTTP_header_add(o, &hres->headers, "WWW-Authenticate",
1145                           "Basic realm=\"YAZ Proxy\"");
1146
1147
1148     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
1149     {
1150         yaz_log (YLOG_LOG, "%sSending %s to client", m_session_str,
1151                  gdu_name(gdu));
1152     }
1153     int len;
1154     int r = send_GDU(gdu, &len);
1155     m_bytes_sent += len;
1156     m_bw_stat.add_bytes(len);
1157     logtime();
1158
1159     recv_GDU_more(true);
1160
1161     return r;
1162 }
1163
1164 int Yaz_Proxy::send_srw_response(Z_SRW_PDU *srw_pdu, int http_code /* = 200 */)
1165 {
1166     ODR o = odr_encode();
1167     const char *ctype = "text/xml";
1168     Z_GDU *gdu = z_get_HTTP_Response(o, http_code);
1169     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
1170     if (m_http_version)
1171         hres->version = odr_strdup(o, m_http_version);
1172     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1173     if (m_http_keepalive)
1174         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1175     else
1176         timeout(0);
1177     if (http_code == 401)
1178         z_HTTP_header_add(o, &hres->headers, "WWW-Authenticate", "Basic realm=\"YAZ Proxy\"");
1179
1180     static Z_SOAP_Handler soap_handlers[2] = {
1181 #if YAZ_HAVE_XSLT
1182         { (char*) "http://www.loc.gov/zing/srw/", 0,
1183          (Z_SOAP_fun) yaz_srw_codec},
1184 #endif
1185         {0, 0, 0}
1186     };
1187
1188     Z_SOAP *soap_package = (Z_SOAP*) odr_malloc(o, sizeof(Z_SOAP));
1189     soap_package->which = Z_SOAP_generic;
1190     soap_package->u.generic =
1191         (Z_SOAP_Generic *) odr_malloc(o,  sizeof(*soap_package->u.generic));
1192     soap_package->u.generic->no = 0;
1193     soap_package->u.generic->ns = soap_handlers[0].ns;
1194     soap_package->u.generic->p = (void *) srw_pdu;
1195     soap_package->ns = m_soap_ns;
1196     z_soap_codec_enc_xsl(o, &soap_package,
1197                          &hres->content_buf, &hres->content_len,
1198                          soap_handlers, 0, m_s2z_stylesheet);
1199     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
1200     {
1201         yaz_log(YLOG_LOG, "%sSending %s to client", m_session_str,
1202                 gdu_name(gdu));
1203     }
1204     int len;
1205     int r = send_GDU(gdu, &len);
1206     m_bytes_sent += len;
1207     m_bw_stat.add_bytes(len);
1208     logtime();
1209
1210     recv_GDU_more(true);
1211
1212     return r;
1213 }
1214
1215 int Yaz_Proxy::send_to_srw_client_error(int srw_error, const char *add)
1216 {
1217     ODR o = odr_encode();
1218     Z_SRW_diagnostic *diagnostic = (Z_SRW_diagnostic *)
1219         odr_malloc(o, sizeof(*diagnostic));
1220     int num_diagnostic = 1;
1221     yaz_mk_std_diagnostic(o, diagnostic, srw_error, add);
1222     return send_srw_search_response(diagnostic, num_diagnostic, srw_error == 3 ? 401 : 200);
1223 }
1224
1225 int Yaz_Proxy::z_to_srw_diag(ODR o, Z_SRW_searchRetrieveResponse *srw_res,
1226                              Z_DefaultDiagFormat *ddf)
1227 {
1228     int bib1_code = *ddf->condition;
1229     if (bib1_code == 109)
1230         return 404;
1231     srw_res->num_diagnostics = 1;
1232     srw_res->diagnostics = (Z_SRW_diagnostic *)
1233         odr_malloc(o, sizeof(*srw_res->diagnostics));
1234     yaz_mk_std_diagnostic(o, srw_res->diagnostics,
1235                           yaz_diag_bib1_to_srw(*ddf->condition),
1236                           ddf->u.v2Addinfo);
1237     return 0;
1238 }
1239
1240 #if YAZ_HAS_MK_SURROGATE
1241 #else
1242 static void yazproxy_mk_sru_surrogate(ODR o, Z_SRW_record *record, int pos,
1243                           int code, const char *details)
1244 {
1245     const char *message = yaz_diag_srw_str(code);
1246     int len = 200;
1247     if (message)
1248         len += strlen(message);
1249     if (details)
1250         len += strlen(details);
1251
1252     record->recordData_buf = (char *) odr_malloc(o, len);
1253
1254     sprintf(record->recordData_buf, "<diagnostic "
1255             "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
1256             " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
1257     if (details)
1258         sprintf(record->recordData_buf + strlen(record->recordData_buf),
1259                 " <details>%s</details>\n", details);
1260     if (message)
1261         sprintf(record->recordData_buf + strlen(record->recordData_buf),
1262                 " <message>%s</message>\n", message);
1263     sprintf(record->recordData_buf + strlen(record->recordData_buf),
1264             "</diagnostic>\n");
1265     record->recordData_len = strlen(record->recordData_buf);
1266     record->recordPosition = odr_intdup(o, pos);
1267     record->recordSchema = odr_strdup(o, "info:srw/schema/1/diagnostics-v1.1");
1268 }
1269 #endif
1270
1271 int Yaz_Proxy::send_to_srw_client_ok(int hits, Z_Records *records, int start)
1272 {
1273     ODR o = odr_encode();
1274     Z_SRW_PDU *srw_pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
1275     Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
1276
1277     srw_res->numberOfRecords = odr_intdup (o, hits);
1278     if (records && records->which == Z_Records_DBOSD)
1279     {
1280         srw_res->num_records =
1281             records->u.databaseOrSurDiagnostics->num_records;
1282         int i;
1283         srw_res->records = (Z_SRW_record *)
1284             odr_malloc(o, srw_res->num_records * sizeof(Z_SRW_record));
1285         for (i = 0; i < srw_res->num_records; i++)
1286         {
1287             Z_NamePlusRecord *npr = records->u.databaseOrSurDiagnostics->records[i];
1288             if (npr->which != Z_NamePlusRecord_databaseRecord)
1289             {
1290 #if YAZ_HAS_MK_SURROGATE
1291                 yaz_mk_sru_surrogate(
1292                     o, srw_res->records + i, i+start,
1293                     YAZ_SRW_RECORD_NOT_AVAILABLE_IN_THIS_SCHEMA, 0);
1294 #else
1295                 yazproxy_mk_sru_surrogate(
1296                     o, srw_res->records + i, i+start,
1297                     YAZ_SRW_RECORD_NOT_AVAILABLE_IN_THIS_SCHEMA, 0);
1298 #endif
1299                 continue;
1300             }
1301             Z_External *r = npr->u.databaseRecord;
1302
1303             if (r->which == Z_External_octet
1304                 && !oid_oidcmp(r->direct_reference, yaz_oid_recsyn_xml))
1305             {
1306                 srw_res->records[i].recordSchema = m_schema;
1307                 srw_res->records[i].recordPacking = m_s2z_packing;
1308                 srw_res->records[i].recordData_buf = (char*)
1309                     r->u.octet_aligned->buf;
1310                 srw_res->records[i].recordData_len = r->u.octet_aligned->len;
1311                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
1312             }
1313             else
1314             {
1315 #if YAZ_HAS_MK_SURROGATE
1316                 yaz_mk_sru_surrogate(
1317                     o, srw_res->records + i, i+start,
1318                     YAZ_SRW_RECORD_NOT_AVAILABLE_IN_THIS_SCHEMA, 0);
1319 #else
1320                 yazproxy_mk_sru_surrogate(
1321                     o, srw_res->records + i, i+start,
1322                     YAZ_SRW_RECORD_NOT_AVAILABLE_IN_THIS_SCHEMA, 0);
1323 #endif
1324             }
1325         }
1326     }
1327     if (records && records->which == Z_Records_NSD)
1328     {
1329         int http_code;
1330         http_code = z_to_srw_diag(odr_encode(), srw_res,
1331                                    records->u.nonSurrogateDiagnostic);
1332         if (http_code)
1333             return send_http_response(http_code);
1334     }
1335     return send_srw_response(srw_pdu);
1336
1337 }
1338
1339 int Yaz_Proxy::send_srw_search_response(Z_SRW_diagnostic *diagnostics,
1340                                         int num_diagnostics, int http_code /* = 200 */)
1341 {
1342     ODR o = odr_encode();
1343     Z_SRW_PDU *srw_pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
1344     Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
1345
1346     srw_res->num_diagnostics = num_diagnostics;
1347     srw_res->diagnostics = diagnostics;
1348     return send_srw_response(srw_pdu, http_code);
1349 }
1350
1351 int Yaz_Proxy::send_srw_explain_response(Z_SRW_diagnostic *diagnostics,
1352                                         int num_diagnostics)
1353 {
1354     int http_status = 404;
1355     Yaz_ProxyConfig *cfg = check_reconfigure();
1356     if (cfg)
1357     {
1358         int len;
1359         char *b = cfg->get_explain_doc(odr_encode(), 0 /* target */,
1360                                        m_s2z_database, &len, &http_status);
1361         if (b)
1362         {
1363             Z_SRW_PDU *res = yaz_srw_get(odr_encode(), Z_SRW_explain_response);
1364             Z_SRW_explainResponse *er = res->u.explain_response;
1365
1366             er->record.recordData_buf = b;
1367             er->record.recordData_len = len;
1368             er->record.recordPacking = m_s2z_packing;
1369             er->record.recordSchema = odr_strdup(odr_encode(),
1370                                                  "http://explain.z3950.org/dtd/2.0/");
1371
1372             er->diagnostics = diagnostics;
1373             er->num_diagnostics = num_diagnostics;
1374             return send_srw_response(res);
1375         }
1376     }
1377     return send_http_response(http_status);
1378 }
1379
1380 int Yaz_Proxy::send_PDU_convert(Z_APDU *apdu)
1381 {
1382     if (m_http_version)
1383     {
1384         if (apdu->which == Z_APDU_initResponse)
1385         {
1386             Z_InitResponse *res = apdu->u.initResponse;
1387             if (*res->result == 0)
1388             {
1389                 send_to_srw_client_error(3, 0);
1390             }
1391             else if (!m_s2z_search_apdu)
1392             {
1393                 send_srw_explain_response(0, 0);
1394             }
1395             else
1396             {
1397                 handle_incoming_Z_PDU(m_s2z_search_apdu);
1398             }
1399         }
1400         else if (m_s2z_search_apdu && apdu->which == Z_APDU_searchResponse)
1401         {
1402             m_s2z_search_apdu = 0;
1403             Z_SearchResponse *res = apdu->u.searchResponse;
1404             m_s2z_hit_count = *res->resultCount;
1405             if (res->records && res->records->which == Z_Records_NSD)
1406             {
1407                 send_to_srw_client_ok(0, res->records, 1);
1408             }
1409             else if (m_s2z_present_apdu && m_s2z_hit_count > 0)
1410             {
1411                 // adjust
1412                 Z_PresentRequest *pr = m_s2z_present_apdu->u.presentRequest;
1413
1414                 if (*pr->resultSetStartPoint <= m_s2z_hit_count)
1415                 {
1416                     if (*pr->numberOfRecordsRequested+ *pr->resultSetStartPoint
1417                         > m_s2z_hit_count)
1418                         *pr->numberOfRecordsRequested =
1419                             1 + m_s2z_hit_count - *pr->resultSetStartPoint;
1420                 }
1421                 handle_incoming_Z_PDU(m_s2z_present_apdu);
1422             }
1423             else
1424             {
1425                 m_s2z_present_apdu = 0;
1426                 send_to_srw_client_ok(m_s2z_hit_count, res->records, 1);
1427             }
1428         }
1429         else if (m_s2z_present_apdu && apdu->which == Z_APDU_presentResponse)
1430         {
1431             int start =
1432                 *m_s2z_present_apdu->u.presentRequest->resultSetStartPoint;
1433
1434             m_s2z_present_apdu = 0;
1435             Z_PresentResponse *res = apdu->u.presentResponse;
1436             send_to_srw_client_ok(m_s2z_hit_count, res->records, start);
1437         }
1438     }
1439     else
1440     {
1441         int len = 0;
1442         if (m_log_mask & PROXY_LOG_REQ_CLIENT)
1443             yaz_log(YLOG_LOG, "%sSending %s to client", m_session_str,
1444                      apdu_name(apdu));
1445         int r = send_Z_PDU(apdu, &len);
1446         m_bytes_sent += len;
1447         m_bw_stat.add_bytes(len);
1448         logtime();
1449         return r;
1450     }
1451     return 0;
1452 }
1453
1454 int Yaz_Proxy::send_to_client(Z_APDU *apdu)
1455 {
1456     int kill_session = 0;
1457     Z_ReferenceId **new_id = get_referenceIdP(apdu);
1458
1459     if (new_id)
1460         *new_id = m_referenceId;
1461
1462     if (apdu->which == Z_APDU_searchResponse)
1463     {
1464         Z_SearchResponse *sr = apdu->u.searchResponse;
1465         Z_Records *p = sr->records;
1466         if (p && p->which == Z_Records_NSD)
1467         {
1468             Z_DiagRec dr, *dr_p = &dr;
1469             dr.which = Z_DiagRec_defaultFormat;
1470             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
1471
1472             *sr->searchStatus = 0;
1473             display_diagrecs(&dr_p, 1);
1474         }
1475         else
1476         {
1477             if (p && p->which == Z_Records_DBOSD)
1478             {
1479                 if (m_backend_type
1480 #if HAVE_USEMARCON
1481                     || m_usemarcon_ini_stage1 || m_usemarcon_ini_stage2
1482 #endif
1483                     )
1484                     convert_to_frontend_type(p->u.databaseOrSurDiagnostics);
1485                 if (m_marcxml_mode == marcxml)
1486                     convert_to_marcxml(p->u.databaseOrSurDiagnostics,
1487                                        m_backend_charset);
1488                 else
1489                     convert_records_charset(p->u.databaseOrSurDiagnostics,
1490                                             m_backend_charset);
1491                 if (convert_xsl(p->u.databaseOrSurDiagnostics, apdu))
1492                     return 0;
1493
1494             }
1495             if (sr->resultCount)
1496             {
1497                 yaz_log(YLOG_LOG, "%s" ODR_INT_PRINTF " hits", m_session_str,
1498                         *sr->resultCount);
1499                 if (*sr->resultCount < 0)
1500                 {
1501                     m_flag_invalid_session = 1;
1502                     kill_session = 1;
1503
1504                     *sr->searchStatus = 0;
1505                     sr->records =
1506                         create_nonSurrogateDiagnostics(odr_encode(), 2, 0);
1507                     *sr->resultCount = 0;
1508                 }
1509             }
1510         }
1511     }
1512     else if (apdu->which == Z_APDU_presentResponse)
1513     {
1514         Z_PresentResponse *sr = apdu->u.presentResponse;
1515         Z_Records *p = sr->records;
1516         if (p && p->which == Z_Records_NSD)
1517         {
1518             Z_DiagRec dr, *dr_p = &dr;
1519             dr.which = Z_DiagRec_defaultFormat;
1520             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
1521             if (*sr->presentStatus == Z_PresentStatus_success)
1522                 *sr->presentStatus = Z_PresentStatus_failure;
1523             display_diagrecs(&dr_p, 1);
1524         }
1525         if (p && p->which == Z_Records_DBOSD)
1526         {
1527             if (m_backend_type
1528 #if HAVE_USEMARCON
1529                 || m_usemarcon_ini_stage1 || m_usemarcon_ini_stage2
1530 #endif
1531                 )
1532                 convert_to_frontend_type(p->u.databaseOrSurDiagnostics);
1533             if (m_marcxml_mode == marcxml)
1534                 convert_to_marcxml(p->u.databaseOrSurDiagnostics,
1535                                    m_backend_charset);
1536             else
1537                 convert_records_charset(p->u.databaseOrSurDiagnostics,
1538                                         m_backend_charset);
1539             if (convert_xsl(p->u.databaseOrSurDiagnostics, apdu))
1540                 return 0;
1541         }
1542     }
1543     else if (apdu->which == Z_APDU_initResponse)
1544     {
1545         //Get and check negotiation record
1546         //from init response.
1547         handle_charset_lang_negotiation(apdu);
1548
1549         if (m_initRequest_options)
1550         {
1551             Z_Options *nopt =
1552                 (Odr_bitmask *)odr_malloc(odr_encode(),
1553                                           sizeof(Odr_bitmask));
1554             ODR_MASK_ZERO(nopt);
1555
1556             int i;
1557             for (i = 0; i<24; i++)
1558                 if (ODR_MASK_GET(m_initRequest_options, i) &&
1559                     ODR_MASK_GET(apdu->u.initResponse->options, i))
1560                     ODR_MASK_SET(nopt, i);
1561             apdu->u.initResponse->options = nopt;
1562         }
1563         if (m_initRequest_version)
1564         {
1565             Z_ProtocolVersion *nopt =
1566                 (Odr_bitmask *)odr_malloc(odr_encode(),
1567                                           sizeof(Odr_bitmask));
1568             ODR_MASK_ZERO(nopt);
1569
1570             int i;
1571             for (i = 0; i<8; i++)
1572                 if (ODR_MASK_GET(m_initRequest_version, i) &&
1573                     ODR_MASK_GET(apdu->u.initResponse->protocolVersion, i))
1574                     ODR_MASK_SET(nopt, i);
1575             apdu->u.initResponse->protocolVersion = nopt;
1576         }
1577         apdu->u.initResponse->preferredMessageSize =
1578             odr_intdup(odr_encode(),
1579                        m_client->m_initResponse_preferredMessageSize >
1580                        m_initRequest_preferredMessageSize ?
1581                        m_initRequest_preferredMessageSize :
1582                        m_client->m_initResponse_preferredMessageSize);
1583         apdu->u.initResponse->maximumRecordSize =
1584             odr_intdup(odr_encode(),
1585                        m_client->m_initResponse_maximumRecordSize >
1586                        m_initRequest_maximumRecordSize ?
1587                        m_initRequest_maximumRecordSize :
1588                        m_client->m_initResponse_maximumRecordSize);
1589     }
1590
1591     int r = send_PDU_convert(apdu);
1592     if (r)
1593         return r;
1594     if (kill_session)
1595     {
1596         delete m_client;
1597         m_client = 0;
1598         m_parent->pre_init();
1599     }
1600     return r;
1601 }
1602
1603 void Yaz_ProxyClient::set_idAuthentication(Z_APDU *apdu)
1604 {
1605     Z_IdAuthentication *t = apdu->u.initRequest->idAuthentication;
1606
1607     odr_reset(m_idAuthentication_odr);
1608     z_IdAuthentication(m_idAuthentication_odr, &t, 1, 0);
1609     m_idAuthentication_ber_buf =
1610         odr_getbuf(m_idAuthentication_odr,
1611                    &m_idAuthentication_ber_size, 0);
1612 }
1613
1614 bool Yaz_ProxyClient::compare_charset(Z_APDU *apdu)
1615 {
1616     return true;
1617 }
1618
1619 bool Yaz_ProxyClient::compare_idAuthentication(Z_APDU *apdu)
1620 {
1621     Z_IdAuthentication *t = apdu->u.initRequest->idAuthentication;
1622     ODR odr = odr_createmem(ODR_ENCODE);
1623
1624     z_IdAuthentication(odr, &t, 1, 0);
1625     int sz;
1626     char *buf = odr_getbuf(odr, &sz, 0);
1627     if (buf && m_idAuthentication_ber_buf
1628         && sz == m_idAuthentication_ber_size
1629         && !memcmp(m_idAuthentication_ber_buf, buf, sz))
1630     {
1631         odr_destroy(odr);
1632         return true;
1633     }
1634     odr_destroy(odr);
1635     if (!buf && !m_idAuthentication_ber_buf)
1636         return true;
1637     return false;
1638 }
1639
1640 int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
1641 {
1642     int len = 0;
1643     const char *apdu_name_tmp = apdu_name(apdu);
1644     int r = send_Z_PDU(apdu, &len);
1645     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
1646         yaz_log(YLOG_LOG, "%sSending %s to %s %d bytes",
1647                  get_session_str(),
1648                  apdu_name_tmp, get_hostname(), len);
1649     m_bytes_sent += len;
1650     return r;
1651 }
1652
1653 Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
1654 {
1655     if (apdu->which == Z_APDU_presentRequest)
1656     {
1657         Z_PresentRequest *pr = apdu->u.presentRequest;
1658         int toget = *pr->numberOfRecordsRequested;
1659         int start = *pr->resultSetStartPoint;
1660
1661         yaz_log(YLOG_LOG, "%sPresent %s %d+%d", m_session_str,
1662                 pr->resultSetId, start, toget);
1663
1664         if (*m_parent->m_optimize == '0')
1665             return apdu;
1666
1667         if (!m_client->m_last_resultSetId)
1668         {
1669             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1670             new_apdu->u.presentResponse->records =
1671                 create_nonSurrogateDiagnostics(
1672                     odr_encode(),
1673                     YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
1674                     pr->resultSetId);
1675             send_to_client(new_apdu);
1676             return 0;
1677         }
1678         if (start < 1 || toget < 0)
1679         {
1680             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1681             new_apdu->u.presentResponse->records =
1682                 create_nonSurrogateDiagnostics(
1683                     odr_encode(),
1684                     YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE,
1685                     0);
1686             send_to_client(new_apdu);
1687             return 0;
1688         }
1689         if (!strcmp(m_client->m_last_resultSetId, pr->resultSetId))
1690         {
1691             if (start+toget-1 > m_client->m_last_resultCount)
1692             {
1693                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1694                 new_apdu->u.presentResponse->records =
1695                     create_nonSurrogateDiagnostics(
1696                         odr_encode(),
1697                         YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE,
1698                         0);
1699                 send_to_client(new_apdu);
1700                 return 0;
1701             }
1702             Z_NamePlusRecordList *npr;
1703 #if 0
1704             yaz_log(YLOG_LOG, "%sCache lookup %d+%d syntax=%s",
1705                     m_session_str, start, toget, yaz_z3950oid_to_str(
1706                         pr->preferredRecordSyntax, &oclass));
1707 #endif
1708             if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
1709                                           pr->preferredRecordSyntax,
1710                                           pr->recordComposition))
1711             {
1712                 yaz_log(YLOG_LOG, "%sReturned cached records for present request",
1713                          m_session_str);
1714                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1715                 new_apdu->u.presentResponse->referenceId = pr->referenceId;
1716
1717                 new_apdu->u.presentResponse->numberOfRecordsReturned
1718                     = odr_intdup(odr_encode(), toget);
1719
1720                 new_apdu->u.presentResponse->records = (Z_Records*)
1721                     odr_malloc(odr_encode(), sizeof(Z_Records));
1722                 new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
1723                 new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
1724                 new_apdu->u.presentResponse->nextResultSetPosition =
1725                     odr_intdup(odr_encode(), start+toget);
1726
1727                 send_to_client(new_apdu);
1728                 return 0;
1729             }
1730         }
1731     }
1732
1733     if (apdu->which != Z_APDU_searchRequest)
1734         return apdu;
1735     Z_SearchRequest *sr = apdu->u.searchRequest;
1736     Yaz_Z_Query *this_query = new Yaz_Z_Query;
1737     Yaz_Z_Databases this_databases;
1738
1739     this_databases.set(sr->num_databaseNames, (const char **)
1740                        sr->databaseNames);
1741
1742     this_query->set_Z_Query(sr->query);
1743
1744     // Check for non-negative piggyback params.
1745     if (*sr->smallSetUpperBound < 0
1746         || *sr->largeSetLowerBound < 0
1747         || *sr->mediumSetPresentNumber < 0)
1748     {
1749         Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1750         // Not a present request.. But can't find better diagnostic
1751         new_apdu->u.searchResponse->records =
1752             create_nonSurrogateDiagnostics(
1753                 odr_encode(),
1754                 YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
1755         send_to_client(new_apdu);
1756         return 0;
1757     }
1758
1759     char query_str[4096];
1760     this_query->print(query_str, sizeof(query_str)-1);
1761     yaz_log(YLOG_LOG, "%sSearch %s", m_session_str, query_str);
1762
1763     if (*m_parent->m_optimize != '0' &&
1764         m_client->m_last_ok && m_client->m_last_query &&
1765         m_client->m_last_query->match(this_query) &&
1766         !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
1767         m_client->m_last_databases.match(this_databases))
1768     {
1769         delete this_query;
1770         if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
1771             m_client->m_last_resultCount < *sr->largeSetLowerBound)
1772         {
1773             Z_NamePlusRecordList *npr;
1774             int toget = *sr->mediumSetPresentNumber;
1775             Z_RecordComposition *comp = 0;
1776
1777             if (toget > m_client->m_last_resultCount)
1778                 toget = m_client->m_last_resultCount;
1779
1780             if (sr->mediumSetElementSetNames)
1781             {
1782                 comp = (Z_RecordComposition *)
1783                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1784                 comp->which = Z_RecordComp_simple;
1785                 comp->u.simple = sr->mediumSetElementSetNames;
1786             }
1787
1788             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1789                                           sr->preferredRecordSyntax, comp))
1790             {
1791                 yaz_log(YLOG_LOG, "%sReturned cached records for medium set",
1792                          m_session_str);
1793                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1794                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1795                 new_apdu->u.searchResponse->resultCount =
1796                     &m_client->m_last_resultCount;
1797
1798                 new_apdu->u.searchResponse->numberOfRecordsReturned
1799                     = odr_intdup(odr_encode(), toget);
1800
1801                 new_apdu->u.searchResponse->presentStatus =
1802                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1803                 new_apdu->u.searchResponse->records = (Z_Records*)
1804                     odr_malloc(odr_encode(), sizeof(Z_Records));
1805                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1806                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1807                 new_apdu->u.searchResponse->nextResultSetPosition =
1808                     odr_intdup(odr_encode(), toget+1);
1809                 send_to_client(new_apdu);
1810                 return 0;
1811             }
1812             else
1813             {
1814                 // medium Set
1815                 // send present request (medium size)
1816                 yaz_log(YLOG_LOG, "%sOptimizing search for medium set",
1817                          m_session_str);
1818
1819                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1820                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1821                 pr->referenceId = sr->referenceId;
1822                 pr->resultSetId = sr->resultSetName;
1823                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1824                 *pr->numberOfRecordsRequested = toget;
1825                 pr->recordComposition = comp;
1826                 m_client->m_sr_transform = 1;
1827                 return new_apdu;
1828             }
1829         }
1830         else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
1831             m_client->m_last_resultCount <= 0)
1832         {
1833             // large set. Return pseudo-search response immediately
1834             yaz_log(YLOG_LOG, "%sOptimizing search for large set",
1835                      m_session_str);
1836             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1837             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1838             new_apdu->u.searchResponse->resultCount =
1839                 &m_client->m_last_resultCount;
1840             send_to_client(new_apdu);
1841             return 0;
1842         }
1843         else
1844         {
1845             Z_NamePlusRecordList *npr;
1846             int toget = m_client->m_last_resultCount;
1847             Z_RecordComposition *comp = 0;
1848             // small set
1849             // send a present request (small set)
1850
1851             if (sr->smallSetElementSetNames)
1852             {
1853                 comp = (Z_RecordComposition *)
1854                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1855                 comp->which = Z_RecordComp_simple;
1856                 comp->u.simple = sr->smallSetElementSetNames;
1857             }
1858
1859             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1860                                           sr->preferredRecordSyntax, comp))
1861             {
1862                 yaz_log(YLOG_LOG, "%sReturned cached records for small set",
1863                          m_session_str);
1864                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1865                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1866                 new_apdu->u.searchResponse->resultCount =
1867                     &m_client->m_last_resultCount;
1868
1869                 new_apdu->u.searchResponse->numberOfRecordsReturned
1870                     = odr_intdup(odr_encode(), toget);
1871
1872                 new_apdu->u.searchResponse->presentStatus =
1873                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1874                 new_apdu->u.searchResponse->records = (Z_Records*)
1875                     odr_malloc(odr_encode(), sizeof(Z_Records));
1876                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1877                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1878                 new_apdu->u.searchResponse->nextResultSetPosition =
1879                     odr_intdup(odr_encode(), toget+1);
1880                 send_to_client(new_apdu);
1881                 return 0;
1882             }
1883             else
1884             {
1885                 yaz_log(YLOG_LOG, "%sOptimizing search for small set",
1886                          m_session_str);
1887                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1888                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1889                 pr->referenceId = sr->referenceId;
1890                 pr->resultSetId = sr->resultSetName;
1891                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1892                 *pr->numberOfRecordsRequested = toget;
1893                 pr->recordComposition = comp;
1894                 m_client->m_sr_transform = 1;
1895                 return new_apdu;
1896             }
1897         }
1898     }
1899     else  // query doesn't match
1900     {
1901         delete m_client->m_last_query;
1902         m_client->m_last_query = this_query;
1903         m_client->m_last_ok = 0;
1904         m_client->m_cache.clear();
1905         m_client->m_resultSetStartPoint = 0;
1906
1907         xfree(m_client->m_last_resultSetId);
1908         m_client->m_last_resultSetId = xstrdup(sr->resultSetName);
1909
1910         m_client->m_last_databases.set(sr->num_databaseNames,
1911                                        (const char **) sr->databaseNames);
1912     }
1913     return apdu;
1914 }
1915
1916
1917 void Yaz_Proxy::inc_request_no()
1918 {
1919     m_request_no++;
1920     char *cp = m_session_str + strlen(m_session_str)-1;
1921     if (*cp == ' ')
1922         cp--;
1923     while (*cp && *cp != ' ')
1924         cp--;
1925     if (*cp)
1926         sprintf(cp+1, "%d ", m_request_no);
1927 }
1928
1929 void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
1930 {
1931     inc_request_no();
1932
1933     m_bytes_recv += len;
1934
1935     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
1936         yaz_log(YLOG_LOG, "%sReceiving %s from client %d bytes",
1937                  m_session_str, gdu_name(apdu), len);
1938
1939 #if 0
1940     // try to make a _bad_ attribute set ID .. Don't enable this in prod.
1941     if (apdu->which == Z_GDU_Z3950
1942         && apdu->u.z3950->which == Z_APDU_searchRequest)
1943     {
1944         Z_SearchRequest *req = apdu->u.z3950->u.searchRequest;
1945         if (req->query && req->query->which == Z_Query_type_1)
1946         {
1947             Z_RPNQuery *rpnquery = req->query->u.type_1;
1948             if (rpnquery->attributeSetId)
1949             {
1950                 rpnquery->attributeSetId[0] = -2;
1951                 rpnquery->attributeSetId[1] = -1;
1952                 yaz_log(YLOG_WARN, "%sBAD FIXUP TEST", m_session_str);
1953             }
1954         }
1955     }
1956 #endif
1957
1958 #if HAVE_GETTIMEOFDAY
1959     gettimeofday((struct timeval *) m_time_tv, 0);
1960 #endif
1961     m_bw_stat.add_bytes(len);
1962     m_pdu_stat.add_bytes(1);
1963
1964     GDU *gdu = new GDU(apdu);
1965
1966     if (gdu->get() == 0)
1967     {
1968         delete gdu;
1969         yaz_log(YLOG_LOG, "%sUnable to encode package", m_session_str);
1970         m_in_queue.clear();
1971         dec_ref();
1972         return;
1973     }
1974     m_in_queue.enqueue(gdu);
1975     recv_GDU_more(false);
1976 }
1977
1978 void Yaz_Proxy::HTTP_Forwarded(Z_GDU *z_gdu)
1979 {
1980     if (z_gdu->which == Z_GDU_HTTP_Request)
1981     {
1982         Z_HTTP_Request *hreq = z_gdu->u.HTTP_Request;
1983         const char *x_forwarded_for =
1984             z_HTTP_header_lookup(hreq->headers, "X-Forwarded-For");
1985         if (x_forwarded_for)
1986         {
1987             xfree(m_peername);
1988             m_peername = (char*) xmalloc(strlen(x_forwarded_for)+5);
1989             sprintf(m_peername, "tcp:%s", x_forwarded_for);
1990
1991             yaz_log(YLOG_LOG, "%sHTTP Forwarded from %s", m_session_str,
1992                     m_peername);
1993             if (m_log_mask & PROXY_LOG_IP_CLIENT)
1994                 sprintf(m_session_str, "%ld:%d %.80s %d ",
1995                         (long) time(0), m_session_no, m_peername, m_request_no);
1996             else
1997                 sprintf(m_session_str, "%ld:%d %d ",
1998                         (long) time(0), m_session_no, m_request_no);
1999         }
2000     }
2001 }
2002
2003 void Yaz_Proxy::connect_stat(bool &block, int &reduce)
2004 {
2005
2006     m_parent->m_connect.cleanup(false);
2007     m_parent->m_connect.add_connect(m_peername);
2008
2009     int connect_total = m_parent->m_connect.get_total(m_peername);
2010     int max_connect = m_parent->m_max_connect;
2011
2012     if (max_connect && connect_total > max_connect)
2013     {
2014         yaz_log(YLOG_LOG, "%sconnect not accepted total=%d max=%d",
2015                 m_session_str, connect_total, max_connect);
2016         block = true;
2017     }
2018     else
2019         block = false;
2020     yaz_log(YLOG_LOG, "%sconnect accepted total=%d", m_session_str,
2021             connect_total);
2022
2023     int limit_connect = m_parent->m_limit_connect;
2024     if (limit_connect)
2025         reduce = connect_total / limit_connect;
2026     else
2027         reduce = 0;
2028 }
2029
2030 void Yaz_Proxy::recv_GDU_reduce(GDU *gdu)
2031 {
2032     HTTP_Forwarded(gdu->get());
2033
2034     int reduce = 0;
2035
2036     if (m_request_no == 1)
2037     {
2038         bool block = false;
2039
2040         connect_stat(block, reduce);
2041
2042         if (block)
2043         {
2044             m_timeout_mode = timeout_busy;
2045             timeout(0);
2046             return;
2047         }
2048     }
2049
2050     int bw_total = m_bw_stat.get_total();
2051     int pdu_total = m_pdu_stat.get_total();
2052     int search_total = m_search_stat.get_total();
2053
2054     assert(m_timeout_mode == timeout_busy);
2055     assert(m_timeout_gdu == 0);
2056
2057     if (m_search_max)
2058         reduce += search_total / m_search_max;
2059     if (m_bw_max)
2060         reduce += (bw_total/m_bw_max);
2061     if (m_pdu_max)
2062     {
2063         if (pdu_total > m_pdu_max)
2064         {
2065             int nreduce = (m_pdu_max >= 60) ? 1 : 60/m_pdu_max;
2066             reduce = (reduce > nreduce) ? reduce : nreduce;
2067         }
2068     }
2069     m_http_version = 0;
2070
2071 #if 0
2072     /* uncomment to force a big reduce */
2073     m_timeout_mode = timeout_reduce;
2074     m_timeout_gdu = gdu;
2075     timeout(3);       // call us reduce seconds later
2076     return;
2077 #endif
2078     if (reduce)
2079     {
2080         yaz_log(YLOG_LOG, "%sdelay=%d bw=%d pdu=%d search=%d limit-bw=%d limit-pdu=%d limit-search=%d",
2081                 m_session_str, reduce, bw_total, pdu_total, search_total,
2082                 m_bw_max, m_pdu_max, m_search_max);
2083
2084         m_timeout_mode = timeout_reduce;
2085         m_timeout_gdu = gdu;
2086         timeout(reduce);       // call us reduce seconds later
2087     }
2088     else
2089         recv_GDU_normal(gdu);
2090 }
2091
2092 void Yaz_Proxy::recv_GDU_more(bool normal)
2093 {
2094     GDU *g;
2095     if (normal && m_timeout_mode == timeout_busy)
2096         m_timeout_mode = timeout_normal;
2097     while (m_timeout_mode == timeout_normal && (g = m_in_queue.dequeue()))
2098     {
2099         m_timeout_mode = timeout_busy;
2100         inc_ref();
2101         recv_GDU_reduce(g);
2102         if (dec_ref())
2103             break;
2104     }
2105 }
2106
2107 void Yaz_Proxy::recv_GDU_normal(GDU *gdu)
2108 {
2109     Z_GDU *apdu = 0;
2110     gdu->move_away_gdu(odr_decode(), &apdu);
2111     delete gdu;
2112
2113     if (apdu->which == Z_GDU_Z3950)
2114         handle_incoming_Z_PDU(apdu->u.z3950);
2115     else if (apdu->which == Z_GDU_HTTP_Request)
2116         handle_incoming_HTTP(apdu->u.HTTP_Request);
2117 }
2118
2119 void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
2120 {
2121     if (m_max_record_retrieve)
2122     {
2123         if (apdu->which == Z_APDU_presentRequest)
2124         {
2125             Z_PresentRequest *pr = apdu->u.presentRequest;
2126             if (pr->numberOfRecordsRequested &&
2127                 *pr->numberOfRecordsRequested > m_max_record_retrieve)
2128                 *pr->numberOfRecordsRequested = m_max_record_retrieve;
2129         }
2130     }
2131 }
2132
2133 void Yaz_Proxy::handle_charset_lang_negotiation(Z_APDU *apdu)
2134 {
2135     if (apdu->which == Z_APDU_initRequest)
2136     {
2137         if (m_initRequest_options &&
2138             !ODR_MASK_GET(m_initRequest_options, Z_Options_negotiationModel) &&
2139             (m_proxy_negotiation_charset || m_proxy_negotiation_lang))
2140         {
2141             // There is no negotiation proposal from
2142             // client's side. OK. The proxy negotiation
2143             // in use, only.
2144             Z_InitRequest *initRequest = apdu->u.initRequest;
2145             Z_OtherInformation **otherInfo;
2146             Z_OtherInformationUnit *oi;
2147             get_otherInfoAPDU(apdu, &otherInfo);
2148             oi = update_otherInformation(otherInfo, 1, NULL, 0, 0);
2149             if (oi)
2150             {
2151                 ODR_MASK_SET(initRequest->options,
2152                     Z_Options_negotiationModel);
2153                 oi->which = Z_OtherInfo_externallyDefinedInfo;
2154                 oi->information.externallyDefinedInfo =
2155                 yaz_set_proposal_charneg(odr_encode(),
2156                     (const char**)&m_proxy_negotiation_charset,
2157                     m_proxy_negotiation_charset ? 1:0,
2158                     (const char**)&m_proxy_negotiation_lang,
2159                     m_proxy_negotiation_lang ? 1:0,
2160                     1);
2161             }
2162         }
2163         else if (m_initRequest_options &&
2164                  ODR_MASK_GET(m_initRequest_options,
2165                               Z_Options_negotiationModel) &&
2166                  m_charset_converter->get_target_query_charset())
2167         {
2168             yaz_log(YLOG_LOG, "%sManaged charset negotiation: charset=%s",
2169                     m_session_str,
2170                     m_charset_converter->get_target_query_charset());
2171             Z_InitRequest *initRequest = apdu->u.initRequest;
2172             Z_CharSetandLanguageNegotiation *negotiation =
2173                 yaz_get_charneg_record (initRequest->otherInfo);
2174             if (negotiation &&
2175                 negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2176             {
2177                 NMEM nmem = nmem_create();
2178                 char **charsets = 0;
2179                 int num_charsets = 0;
2180                 char **langs = 0;
2181                 int num_langs = 0;
2182                 int selected = 0;
2183                 yaz_get_proposal_charneg (nmem, negotiation,
2184                                           &charsets, &num_charsets,
2185                                           &langs, &num_langs, &selected);
2186                 int i;
2187                 for (i = 0; i<num_charsets; i++)
2188                     yaz_log(YLOG_LOG, "%scharset %s", m_session_str,
2189                             charsets[i]);
2190                 for (i = 0; i<num_langs; i++)
2191                     yaz_log(YLOG_LOG, "%slang %s", m_session_str,
2192                             langs[i]);
2193
2194                 const char *t_charset =
2195                     m_charset_converter->get_target_query_charset();
2196                 // sweep through charsets and pick the first supported
2197                 // conversion
2198                 for (i = 0; i<num_charsets; i++)
2199                 {
2200                     const char *c_charset = charsets[i];
2201                     if (!odr_set_charset(odr_decode(), t_charset, c_charset))
2202                         break;
2203                 }
2204                 if (i != num_charsets)
2205                 {
2206                     // got one .. set up ODR for reverse direction
2207                     const char *c_charset = charsets[i];
2208                     odr_set_charset(odr_encode(), c_charset, t_charset);
2209                     m_charset_converter->set_client_query_charset(c_charset);
2210                     m_charset_converter->set_client_charset_selected(selected);
2211                 }
2212                 nmem_destroy(nmem);
2213                 ODR_MASK_CLEAR(m_initRequest_options,
2214                                Z_Options_negotiationModel);
2215                 yaz_del_charneg_record(&initRequest->otherInfo);
2216             }
2217             else
2218             {
2219                 yaz_log(YLOG_WARN, "%sUnable to decode charset package",
2220                         m_session_str);
2221             }
2222         }
2223         else if (m_charset_converter->get_target_query_charset() &&
2224             m_proxy_negotiation_default_charset)
2225         {
2226             m_charset_converter->
2227                 set_client_query_charset(m_proxy_negotiation_default_charset);
2228         }
2229     }
2230     else if (apdu->which == Z_APDU_initResponse)
2231     {
2232         Z_InitResponse *initResponse = apdu->u.initResponse;
2233         Z_OtherInformation **otherInfo;
2234         get_otherInfoAPDU(apdu, &otherInfo);
2235
2236         Z_CharSetandLanguageNegotiation *charneg = 0;
2237
2238         if (otherInfo && *otherInfo &&
2239             ODR_MASK_GET(initResponse->options, Z_Options_negotiationModel)
2240             && (charneg = yaz_get_charneg_record(*otherInfo)))
2241         {
2242             char *charset = 0;
2243             char *lang = 0;
2244             int selected = 0;
2245
2246             yaz_get_response_charneg(m_referenceId_mem, charneg,
2247                 &charset, &lang, &selected);
2248
2249             yaz_log(YLOG_LOG, "%sAccepted charset - '%s' and lang - '%s'",
2250                 m_session_str, (charset)?charset:"none", (lang)?lang:"none");
2251
2252             if (m_initRequest_options &&
2253                 ODR_MASK_GET(m_initRequest_options, Z_Options_negotiationModel))
2254             {
2255                 yaz_log(YLOG_LOG, "%sClient's negotiation record in use",
2256                     m_session_str);
2257             }
2258             else if (m_proxy_negotiation_charset || m_proxy_negotiation_lang)
2259             {
2260                 // negotiation-charset, negotiation-lang
2261                 // elements of config file in use.
2262
2263                 yaz_log(YLOG_LOG, "%sProxy's negotiation record in use",
2264                     m_session_str);
2265
2266                 // clear negotiation option.
2267                 ODR_MASK_CLEAR(initResponse->options, Z_Options_negotiationModel);
2268
2269                 // Delete negotiation (charneg-3) entry.
2270                 yaz_del_charneg_record(otherInfo);
2271             }
2272         }
2273         else
2274         {
2275             if (m_proxy_negotiation_charset || m_proxy_negotiation_lang)
2276             {
2277                 yaz_log(YLOG_LOG, "%sTarget did not honor negotiation",
2278                         m_session_str);
2279             }
2280             else if (m_charset_converter->get_client_query_charset())
2281             {
2282                 Z_OtherInformation **otherInfo;
2283                 Z_OtherInformationUnit *oi;
2284                 get_otherInfoAPDU(apdu, &otherInfo);
2285                 oi = update_otherInformation(otherInfo, 1, NULL, 0, 0);
2286                 if (oi)
2287                 {
2288                     ODR_MASK_SET(initResponse->options,
2289                                  Z_Options_negotiationModel);
2290                     if (m_initRequest_options)
2291                         ODR_MASK_SET(m_initRequest_options,
2292                                      Z_Options_negotiationModel);
2293
2294                     oi->which = Z_OtherInfo_externallyDefinedInfo;
2295                     oi->information.externallyDefinedInfo =
2296                         yaz_set_response_charneg(
2297                             odr_encode(),
2298                             m_charset_converter->get_client_query_charset(),
2299                             0 /* no lang */,
2300                             m_charset_converter->get_client_charset_selected());
2301                 }
2302             }
2303         }
2304     }
2305 }
2306
2307 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
2308                                                      int error,
2309                                                      const char *addinfo)
2310 {
2311     Z_Records *rec = (Z_Records *)
2312         odr_malloc (odr, sizeof(*rec));
2313     Odr_int *err = (Odr_int *)
2314         odr_malloc (odr, sizeof(*err));
2315     Z_DiagRec *drec = (Z_DiagRec *)
2316         odr_malloc (odr, sizeof(*drec));
2317     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
2318         odr_malloc (odr, sizeof(*dr));
2319     *err = error;
2320     rec->which = Z_Records_NSD;
2321     rec->u.nonSurrogateDiagnostic = dr;
2322     dr->diagnosticSetId = odr_oiddup(odr, yaz_oid_diagset_bib_1);
2323     dr->condition = err;
2324     dr->which = Z_DefaultDiagFormat_v2Addinfo;
2325     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
2326     return rec;
2327 }
2328
2329 Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
2330 {
2331     if (apdu->which == Z_APDU_searchRequest &&
2332         apdu->u.searchRequest->query &&
2333         apdu->u.searchRequest->query->which == Z_Query_type_104 &&
2334         apdu->u.searchRequest->query->u.type_104->which == Z_External_CQL)
2335     {
2336         Z_RPNQuery *rpnquery = 0;
2337         Z_SearchRequest *sr = apdu->u.searchRequest;
2338         char *addinfo = 0;
2339
2340         yaz_log(YLOG_LOG, "%sCQL: %s", m_session_str,
2341                 sr->query->u.type_104->u.cql);
2342
2343         int r = m_cql2rpn.query_transform(sr->query->u.type_104->u.cql,
2344                                           &rpnquery, odr_encode(),
2345                                           &addinfo);
2346         if (r == -3)
2347             yaz_log(YLOG_LOG, "%sNo CQL to RPN table", m_session_str);
2348         else if (r)
2349         {
2350             yaz_log(YLOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
2351             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2352
2353             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2354             new_apdu->u.searchResponse->records =
2355                 create_nonSurrogateDiagnostics(odr_encode(),
2356                                                yaz_diag_srw_to_bib1(r),
2357                                                addinfo);
2358             *new_apdu->u.searchResponse->searchStatus = 0;
2359
2360             send_to_client(new_apdu);
2361
2362             return 0;
2363         }
2364         else
2365         {
2366             sr->query->which = Z_Query_type_1;
2367             sr->query->u.type_1 = rpnquery;
2368         }
2369         return apdu;
2370     }
2371     return apdu;
2372 }
2373
2374 Z_APDU *Yaz_Proxy::handle_target_charset_conversion(Z_APDU *apdu)
2375 {
2376     if (apdu->which == Z_APDU_searchRequest &&
2377         apdu->u.searchRequest->query)
2378     {
2379         if (apdu->u.searchRequest->query->which == Z_Query_type_1
2380             || apdu->u.searchRequest->query->which == Z_Query_type_101)
2381         {
2382             if (m_http_version)
2383                 m_charset_converter->set_client_query_charset("UTF-8");
2384             Z_RPNQuery *rpnquery = apdu->u.searchRequest->query->u.type_1;
2385             m_charset_converter->convert_type_1(rpnquery, odr_encode());
2386         }
2387     }
2388     return apdu;
2389 }
2390
2391
2392 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
2393 {
2394     if (apdu->which == Z_APDU_searchRequest)
2395     {
2396         Z_SearchRequest *sr = apdu->u.searchRequest;
2397         int err = 0;
2398         char *addinfo = 0;
2399
2400         Yaz_ProxyConfig *cfg = check_reconfigure();
2401         if (cfg)
2402             err = cfg->check_query(odr_encode(), m_default_target,
2403                                    sr->query, &addinfo);
2404         if (err)
2405         {
2406             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2407
2408             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2409             new_apdu->u.searchResponse->records =
2410                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2411             *new_apdu->u.searchResponse->searchStatus = 0;
2412
2413             send_to_client(new_apdu);
2414
2415             return 0;
2416         }
2417     }
2418     return apdu;
2419 }
2420
2421 int Yaz_Proxy::handle_authentication(Z_APDU *apdu)
2422 {
2423     if (apdu->which != Z_APDU_initRequest)
2424         return 1;  // pass if no init request
2425     Z_InitRequest *req = apdu->u.initRequest;
2426
2427     Yaz_ProxyConfig *cfg = check_reconfigure();
2428     if (!cfg)
2429         return 1;  // pass if no config
2430
2431     int ret;
2432     if (req->idAuthentication == 0)
2433     {
2434         ret = cfg->client_authentication(m_default_target, 0, 0, 0,
2435                                          m_peername);
2436     }
2437     else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2438     {
2439         ret = cfg->client_authentication(
2440             m_default_target,
2441             req->idAuthentication->u.idPass->userId,
2442             req->idAuthentication->u.idPass->groupId,
2443             req->idAuthentication->u.idPass->password,
2444             m_peername);
2445     }
2446     else if (req->idAuthentication->which == Z_IdAuthentication_open)
2447     {
2448         char user[64], pass[64];
2449         *user = '\0';
2450         *pass = '\0';
2451         sscanf(req->idAuthentication->u.open, "%63[^/]/%63s", user, pass);
2452         ret = cfg->client_authentication(m_default_target, user, 0, pass,
2453                                          m_peername);
2454     }
2455     else
2456         ret = cfg->client_authentication(m_default_target, 0, 0, 0,
2457                                          m_peername);
2458     return ret;
2459 }
2460
2461 int Yaz_Proxy::handle_global_authentication(Z_APDU *apdu)
2462 {
2463     if (apdu->which != Z_APDU_initRequest)
2464         return 1;  // pass if no init request
2465     Z_InitRequest *req = apdu->u.initRequest;
2466
2467     Yaz_ProxyConfig *cfg = check_reconfigure();
2468     if (!cfg)
2469         return 1;  // pass if no config
2470
2471     int ret;
2472     if (req->idAuthentication == 0)
2473     {
2474         ret = cfg->global_client_authentication(0, 0, 0,
2475                                                 m_peername);
2476     }
2477     else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2478     {
2479         ret = cfg->global_client_authentication(
2480             req->idAuthentication->u.idPass->userId,
2481             req->idAuthentication->u.idPass->groupId,
2482             req->idAuthentication->u.idPass->password,
2483             m_peername);
2484     }
2485     else if (req->idAuthentication->which == Z_IdAuthentication_open)
2486     {
2487         char user[64], pass[64];
2488         *user = '\0';
2489         *pass = '\0';
2490         sscanf(req->idAuthentication->u.open, "%63[^/]/%63s", user, pass);
2491         ret = cfg->global_client_authentication(user, 0, pass,
2492                                                 m_peername);
2493     }
2494     else
2495         ret = cfg->global_client_authentication(0, 0, 0, m_peername);
2496     return ret;
2497 }
2498
2499 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
2500 {
2501     m_marcxml_mode = none;
2502     if (apdu->which == Z_APDU_searchRequest)
2503     {
2504         Z_SearchRequest *sr = apdu->u.searchRequest;
2505         int err = 0;
2506         char *addinfo = 0;
2507         Yaz_ProxyConfig *cfg = check_reconfigure();
2508
2509         Z_RecordComposition rc_temp, *rc = 0;
2510         if (sr->smallSetElementSetNames)
2511         {
2512             rc_temp.which = Z_RecordComp_simple;
2513             rc_temp.u.simple = sr->smallSetElementSetNames;
2514             rc = &rc_temp;
2515         }
2516
2517         if (sr->preferredRecordSyntax)
2518             oid_oidcpy(m_frontend_type, sr->preferredRecordSyntax);
2519         else
2520             m_frontend_type[0] = -1;
2521
2522         char *stylesheet_name = 0;
2523         if (cfg)
2524             err = cfg->check_syntax(odr_encode(),
2525                                     m_default_target,
2526                                     sr->preferredRecordSyntax, rc,
2527                                     &addinfo, &stylesheet_name, &m_schema,
2528                                     &m_backend_type, &m_backend_charset,
2529                                     &m_usemarcon_ini_stage1,
2530                                     &m_usemarcon_ini_stage2);
2531         if (stylesheet_name)
2532         {
2533             m_parent->low_socket_close();
2534
2535 #if YAZ_HAVE_XSLT
2536             if (m_stylesheet_xsp)
2537                 xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
2538             m_stylesheet_xsp = xsltParseStylesheetFile((const xmlChar*)
2539                                                        stylesheet_name);
2540 #endif
2541             m_stylesheet_offset = 0;
2542             xfree(stylesheet_name);
2543
2544             m_parent->low_socket_open();
2545         }
2546         if (err == -1)
2547         {
2548             sr->smallSetElementSetNames = 0;
2549             sr->mediumSetElementSetNames = 0;
2550             m_marcxml_mode = marcxml;
2551             sr->preferredRecordSyntax =
2552                 yaz_string_to_oid_odr(
2553                     yaz_oid_std(), CLASS_RECSYN,
2554                     m_backend_type ? m_backend_type : "usmarc",
2555                     odr_encode());
2556         }
2557         else if (err)
2558         {
2559             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2560
2561             new_apdu->u.searchResponse->referenceId = sr->referenceId;
2562             new_apdu->u.searchResponse->records =
2563                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2564             *new_apdu->u.searchResponse->searchStatus = 0;
2565
2566             send_to_client(new_apdu);
2567
2568             return 0;
2569         }
2570         else if (m_backend_type)
2571         {
2572             sr->preferredRecordSyntax =
2573                 yaz_string_to_oid_odr(yaz_oid_std(), CLASS_RECSYN,
2574                                       m_backend_type, odr_encode());
2575         }
2576     }
2577     else if (apdu->which == Z_APDU_presentRequest)
2578     {
2579         Z_PresentRequest *pr = apdu->u.presentRequest;
2580         int err = 0;
2581         char *addinfo = 0;
2582         Yaz_ProxyConfig *cfg = check_reconfigure();
2583
2584         if (pr->preferredRecordSyntax)
2585             oid_oidcpy(m_frontend_type, pr->preferredRecordSyntax);
2586         else
2587             m_frontend_type[0] = -1;
2588
2589         char *stylesheet_name = 0;
2590         if (cfg)
2591             err = cfg->check_syntax(odr_encode(), m_default_target,
2592                                     pr->preferredRecordSyntax,
2593                                     pr->recordComposition,
2594                                     &addinfo, &stylesheet_name, &m_schema,
2595                                     &m_backend_type, &m_backend_charset,
2596                                     &m_usemarcon_ini_stage1,
2597                                     &m_usemarcon_ini_stage2
2598                                     );
2599         if (stylesheet_name)
2600         {
2601             m_parent->low_socket_close();
2602
2603 #if YAZ_HAVE_XSLT
2604             if (m_stylesheet_xsp)
2605                 xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
2606             m_stylesheet_xsp = xsltParseStylesheetFile((const xmlChar*)
2607                                                        stylesheet_name);
2608 #endif
2609             m_stylesheet_offset = 0;
2610             xfree(stylesheet_name);
2611
2612             m_parent->low_socket_open();
2613         }
2614         if (err == -1)
2615         {
2616             pr->recordComposition = 0;
2617             m_marcxml_mode = marcxml;
2618
2619             pr->preferredRecordSyntax =
2620                 yaz_string_to_oid_odr(
2621                     yaz_oid_std(), CLASS_RECSYN,
2622                     m_backend_type ? m_backend_type : "usmarc",
2623                     odr_encode());
2624         }
2625         else if (err)
2626         {
2627             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
2628
2629             new_apdu->u.presentResponse->referenceId = pr->referenceId;
2630             new_apdu->u.presentResponse->records =
2631                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
2632             *new_apdu->u.presentResponse->presentStatus =
2633                 Z_PresentStatus_failure;
2634
2635             send_to_client(new_apdu);
2636
2637             return 0;
2638         }
2639         else if (m_backend_type)
2640         {
2641             pr->preferredRecordSyntax =
2642                 yaz_string_to_oid_odr(yaz_oid_std(),
2643                                       CLASS_RECSYN, m_backend_type,
2644                                       odr_encode());
2645         }
2646     }
2647     return apdu;
2648 }
2649
2650 Z_ElementSetNames *Yaz_Proxy::mk_esn_from_schema(ODR o, const char *schema)
2651 {
2652     if (!schema)
2653         return 0;
2654     Z_ElementSetNames *esn = (Z_ElementSetNames *)
2655         odr_malloc(o, sizeof(Z_ElementSetNames));
2656     esn->which = Z_ElementSetNames_generic;
2657     esn->u.generic = odr_strdup(o, schema);
2658     return esn;
2659 }
2660
2661 void Yaz_Proxy::srw_get_client(const char *db, const char **backend_db)
2662 {
2663     const char *t = 0;
2664     Yaz_ProxyConfig *cfg = check_reconfigure();
2665     if (cfg)
2666         t = cfg->get_explain_name(db, backend_db);
2667
2668     if (m_client && m_default_target && t && strcmp(m_default_target, t))
2669     {
2670         releaseClient();
2671     }
2672
2673     if (t)
2674     {
2675         xfree(m_default_target);
2676         m_default_target = xstrdup(t);
2677     }
2678 }
2679
2680 int Yaz_Proxy::file_access(Z_HTTP_Request *hreq)
2681 {
2682     struct stat sbuf;
2683     if (strcmp(hreq->method, "GET"))
2684         return 0;
2685     if (hreq->path[0] != '/')
2686         return 0;
2687     const char *cp = hreq->path;
2688     while (*cp)
2689     {
2690         if (*cp == '/' && strchr("/.", cp[1]))
2691             return 0;
2692         cp++;
2693     }
2694
2695     Yaz_ProxyConfig *cfg = check_reconfigure();
2696
2697     if (!cfg->get_file_access_info(hreq->path+1))
2698         return 0;
2699
2700     const char *fname = hreq->path+1;
2701     if (stat(fname, &sbuf))
2702     {
2703         yaz_log(YLOG_LOG|YLOG_ERRNO, "%sstat failed for %s", m_session_str,
2704                 fname);
2705         return 0;
2706     }
2707     if ((sbuf.st_mode & S_IFMT) != S_IFREG)
2708     {
2709         yaz_log(YLOG_LOG, "%sNot a regular file %s", m_session_str, fname);
2710         return 0;
2711     }
2712     if (sbuf.st_size > (off_t) 1000000)
2713     {
2714         yaz_log(YLOG_WARN, "%sFile %s too large for transfer", m_session_str,
2715                 fname);
2716         return 0;
2717     }
2718
2719     ODR o = odr_encode();
2720
2721     const char *ctype = cfg->check_mime_type(fname);
2722     Z_GDU *gdu = z_get_HTTP_Response(o, 200);
2723     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
2724     if (m_http_version)
2725         hres->version = odr_strdup(o, m_http_version);
2726     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
2727     if (m_http_keepalive)
2728         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
2729     else
2730         timeout(0);
2731
2732     hres->content_len = sbuf.st_size;
2733     hres->content_buf = (char*) odr_malloc(o, hres->content_len);
2734     FILE *f = fopen(fname, "rb");
2735     if (f)
2736     {
2737         fread(hres->content_buf, 1, hres->content_len, f);
2738         fclose(f);
2739     }
2740     else
2741     {
2742         return 0;
2743     }
2744     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
2745     {
2746         yaz_log(YLOG_LOG, "%sSending file %s to client", m_session_str,
2747                  fname);
2748     }
2749     int len;
2750     send_GDU(gdu, &len);
2751     recv_GDU_more(true);
2752     return 1;
2753 }
2754
2755 void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
2756 {
2757     if (m_s2z_odr_init)
2758     {
2759         odr_destroy(m_s2z_odr_init);
2760         m_s2z_odr_init = 0;
2761     }
2762     if (m_s2z_odr_search)
2763     {
2764         odr_destroy(m_s2z_odr_search);
2765         m_s2z_odr_search = 0;
2766     }
2767
2768     m_http_keepalive = 0;
2769     m_http_version = 0;
2770     if (!strcmp(hreq->version, "1.0"))
2771     {
2772         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
2773         if (v && !strcmp(v, "Keep-Alive"))
2774             m_http_keepalive = 1;
2775         else
2776             m_http_keepalive = 0;
2777         m_http_version = "1.0";
2778     }
2779     else
2780     {
2781         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
2782         if (v && !strcmp(v, "close"))
2783             m_http_keepalive = 0;
2784         else
2785             m_http_keepalive = 1;
2786         m_http_version = "1.1";
2787     }
2788
2789     const char *a = z_HTTP_header_lookup(hreq->headers, "Authorization");
2790     char authorization_str[255];
2791     *authorization_str = '\0';
2792     if (a && strncasecmp(a, "Basic ", 6) == 0)
2793         base64_decode(a + 6, authorization_str, 254);
2794
2795     Z_SRW_PDU *srw_pdu = 0;
2796     Z_SOAP *soap_package = 0;
2797     char *charset = 0;
2798     Z_SRW_diagnostic *diagnostic = 0;
2799     int num_diagnostic = 0;
2800
2801     yaz_log(YLOG_LOG, "%s%s %s", m_session_str, hreq->method, hreq->path);
2802
2803     if (file_access(hreq))
2804     {
2805         return;
2806     }
2807     else if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
2808                             &charset) == 0
2809              || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
2810                                &charset, &diagnostic, &num_diagnostic) == 0)
2811     {
2812         m_s2z_odr_init = odr_createmem(ODR_ENCODE);
2813         m_s2z_odr_search = odr_createmem(ODR_ENCODE);
2814         m_soap_ns = odr_strdup(m_s2z_odr_search, soap_package->ns);
2815         m_s2z_init_apdu = 0;
2816         m_s2z_search_apdu = 0;
2817         m_s2z_present_apdu = 0;
2818
2819         m_s2z_stylesheet = 0;
2820
2821         Z_IdAuthentication *auth = NULL;
2822         if (srw_pdu->username && !srw_pdu->password)
2823         {
2824             yaz_log(YLOG_LOG, "username: %s\n", srw_pdu->username);
2825             auth = (Z_IdAuthentication *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdAuthentication));
2826             auth->which = Z_IdAuthentication_open;
2827             auth->u.open = odr_strdup(m_s2z_odr_init, srw_pdu->username);
2828         }
2829         else if (srw_pdu->username && srw_pdu->password)
2830         {
2831             yaz_log(YLOG_LOG, "username/password: %s/%s\n",
2832                     srw_pdu->username, srw_pdu->password);
2833             auth = (Z_IdAuthentication *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdAuthentication));
2834             auth->which = Z_IdAuthentication_idPass;
2835             auth->u.idPass = (Z_IdPass *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdPass));
2836             auth->u.idPass->groupId = NULL;
2837             auth->u.idPass->password = odr_strdup(m_s2z_odr_init, srw_pdu->password);
2838             auth->u.idPass->userId = odr_strdup(m_s2z_odr_init, srw_pdu->username);
2839         }
2840         else
2841         {
2842             if (*authorization_str)
2843             {
2844                 yaz_log(YLOG_LOG, "authorization_str present: %s\n", authorization_str);
2845                 auth = (Z_IdAuthentication *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdAuthentication));
2846                 auth->which = Z_IdAuthentication_idPass;
2847                 auth->u.idPass = (Z_IdPass *) odr_malloc(m_s2z_odr_init, sizeof(Z_IdPass));
2848                 auth->u.idPass->groupId = NULL;
2849                 char *p = strchr(authorization_str, ':');
2850                 if (p)
2851                 {
2852                     *p = '\0';
2853                     p++;
2854                     auth->u.idPass->password = odr_strdup(m_s2z_odr_init, p);
2855                 }
2856                 auth->u.idPass->userId = odr_strdup(m_s2z_odr_init, authorization_str);
2857             }
2858         }
2859
2860         if (srw_pdu->which == Z_SRW_searchRetrieve_request)
2861         {
2862
2863             Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
2864
2865             const char *backend_db = srw_req->database;
2866             srw_get_client(srw_req->database, &backend_db);
2867
2868             m_s2z_database = odr_strdup(m_s2z_odr_init, srw_req->database);
2869             // recordXPath unsupported.
2870             if (srw_req->recordXPath)
2871             {
2872                 yaz_add_srw_diagnostic(odr_decode(),
2873                                        &diagnostic, &num_diagnostic,
2874                                        72, 0);
2875             }
2876             // sort unsupported
2877             if (srw_req->sort_type != Z_SRW_sort_type_none)
2878             {
2879                 yaz_add_srw_diagnostic(odr_decode(),
2880                                        &diagnostic, &num_diagnostic,
2881                                        80, 0);
2882             }
2883             // save stylesheet
2884             if (srw_req->stylesheet)
2885                 m_s2z_stylesheet =
2886                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
2887
2888             // set packing for response records ..
2889             if (srw_req->recordPacking &&
2890                 !strcmp(srw_req->recordPacking, "xml"))
2891                 m_s2z_packing = Z_SRW_recordPacking_XML;
2892             else
2893                 m_s2z_packing = Z_SRW_recordPacking_string;
2894
2895             if (num_diagnostic)
2896             {
2897                 Z_SRW_PDU *srw_pdu =
2898                     yaz_srw_get(odr_encode(),
2899                                 Z_SRW_searchRetrieve_response);
2900                 Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
2901
2902                 srw_res->diagnostics = diagnostic;
2903                 srw_res->num_diagnostics = num_diagnostic;
2904                 send_srw_response(srw_pdu);
2905                 return;
2906             }
2907
2908             // prepare search PDU
2909             m_s2z_search_apdu = zget_APDU(m_s2z_odr_search,
2910                                           Z_APDU_searchRequest);
2911             Z_SearchRequest *z_searchRequest =
2912                 m_s2z_search_apdu->u.searchRequest;
2913
2914             z_searchRequest->num_databaseNames = 1;
2915             z_searchRequest->databaseNames = (char**)
2916                 odr_malloc(m_s2z_odr_search, sizeof(char *));
2917             z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
2918                                                            backend_db);
2919
2920             // query transformation
2921             Z_Query *query = (Z_Query *)
2922                 odr_malloc(m_s2z_odr_search, sizeof(Z_Query));
2923             z_searchRequest->query = query;
2924
2925             if (srw_req->query_type == Z_SRW_query_type_cql)
2926             {
2927                 Z_External *ext = (Z_External *)
2928                     odr_malloc(m_s2z_odr_search, sizeof(*ext));
2929                 ext->direct_reference =
2930                     odr_getoidbystr(m_s2z_odr_search, "1.2.840.10003.16.2");
2931                 ext->indirect_reference = 0;
2932                 ext->descriptor = 0;
2933                 ext->which = Z_External_CQL;
2934                 ext->u.cql = srw_req->query.cql;
2935
2936                 query->which = Z_Query_type_104;
2937                 query->u.type_104 =  ext;
2938             }
2939             else if (srw_req->query_type == Z_SRW_query_type_pqf)
2940             {
2941                 Z_RPNQuery *RPNquery;
2942                 YAZ_PQF_Parser pqf_parser;
2943
2944                 pqf_parser = yaz_pqf_create ();
2945
2946                 RPNquery = yaz_pqf_parse (pqf_parser, m_s2z_odr_search,
2947                                           srw_req->query.pqf);
2948                 if (!RPNquery)
2949                 {
2950                     const char *pqf_msg;
2951                     size_t off;
2952                     int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
2953                     int ioff = off;
2954                     yaz_log(YLOG_LOG, "%*s^\n", ioff+4, "");
2955                     yaz_log(YLOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
2956
2957                     send_to_srw_client_error(10, 0);
2958                     return;
2959                 }
2960                 query->which = Z_Query_type_1;
2961                 query->u.type_1 =  RPNquery;
2962
2963                 yaz_pqf_destroy (pqf_parser);
2964             }
2965             else
2966             {
2967                 send_to_srw_client_error(7, "query");
2968                 return;
2969             }
2970
2971             // present
2972             m_s2z_present_apdu = 0;
2973             int max = 0;
2974             if (srw_req->maximumRecords)
2975                 max = *srw_req->maximumRecords;
2976             int start = 1;
2977             if (srw_req->startRecord)
2978                 start = *srw_req->startRecord;
2979             if (max > 0)
2980             {
2981                 // Some backend, such as Voyager doesn't honor piggyback
2982                 // So we use present always (0 &&).
2983                 if (0 && start <= 1)  // Z39.50 piggyback
2984                 {
2985                     *z_searchRequest->smallSetUpperBound = max;
2986                     *z_searchRequest->mediumSetPresentNumber = max;
2987                     *z_searchRequest->largeSetLowerBound = 2000000000; // 2e9
2988
2989                     z_searchRequest->preferredRecordSyntax =
2990                         odr_oiddup(m_s2z_odr_search, yaz_oid_recsyn_xml);
2991
2992                     if (srw_req->recordSchema)
2993                     {
2994                         z_searchRequest->smallSetElementSetNames =
2995                             z_searchRequest->mediumSetElementSetNames =
2996                             mk_esn_from_schema(m_s2z_odr_search,
2997                                                srw_req->recordSchema);
2998                     }
2999                 }
3000                 else   // Z39.50 present
3001                 {
3002                     m_s2z_present_apdu = zget_APDU(m_s2z_odr_search,
3003                                                    Z_APDU_presentRequest);
3004                     Z_PresentRequest *z_presentRequest =
3005                         m_s2z_present_apdu->u.presentRequest;
3006                     *z_presentRequest->resultSetStartPoint = start;
3007                     *z_presentRequest->numberOfRecordsRequested = max;
3008
3009                     z_presentRequest->preferredRecordSyntax =
3010                         odr_oiddup(m_s2z_odr_search, yaz_oid_recsyn_xml);
3011                     if (srw_req->recordSchema)
3012                     {
3013                         z_presentRequest->recordComposition =
3014                             (Z_RecordComposition *)
3015                             odr_malloc(m_s2z_odr_search,
3016                                        sizeof(Z_RecordComposition));
3017                         z_presentRequest->recordComposition->which =
3018                             Z_RecordComp_simple;
3019                         z_presentRequest->recordComposition->u.simple =
3020                             mk_esn_from_schema(m_s2z_odr_search,
3021                                                srw_req->recordSchema);
3022                     }
3023                 }
3024             }
3025             if (!m_client)
3026             {
3027                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
3028                                             Z_APDU_initRequest);
3029
3030                 m_s2z_init_apdu->u.initRequest->idAuthentication = auth;
3031
3032                 // prevent m_initRequest_apdu memory from being grabbed
3033                 // in Yaz_Proxy::handle_incoming_Z_PDU
3034                 m_initRequest_apdu = m_s2z_init_apdu;
3035                 handle_incoming_Z_PDU(m_s2z_init_apdu);
3036                 return;
3037             }
3038             else
3039             {
3040                 handle_incoming_Z_PDU(m_s2z_search_apdu);
3041                 return;
3042             }
3043         }
3044         else if (srw_pdu->which == Z_SRW_explain_request)
3045         {
3046             Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
3047
3048             const char *backend_db = srw_req->database;
3049             srw_get_client(srw_req->database, &backend_db);
3050
3051             m_s2z_database = odr_strdup(m_s2z_odr_init, srw_req->database);
3052
3053             // save stylesheet
3054             if (srw_req->stylesheet)
3055                 m_s2z_stylesheet =
3056                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
3057
3058             if (srw_req->recordPacking &&
3059                 !strcmp(srw_req->recordPacking, "xml"))
3060                 m_s2z_packing = Z_SRW_recordPacking_XML;
3061             else
3062                 m_s2z_packing = Z_SRW_recordPacking_string;
3063
3064             if (num_diagnostic)
3065             {
3066                 send_srw_explain_response(diagnostic, num_diagnostic);
3067                 return;
3068             }
3069
3070             if (!m_client)
3071             {
3072                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
3073                                             Z_APDU_initRequest);
3074
3075                 m_s2z_init_apdu->u.initRequest->idAuthentication = auth;
3076
3077                 // prevent m_initRequest_apdu memory from being grabbed
3078                 // in Yaz_Proxy::handle_incoming_Z_PDU
3079                 m_initRequest_apdu = m_s2z_init_apdu;
3080                 handle_incoming_Z_PDU(m_s2z_init_apdu);
3081             }
3082             else
3083                 send_srw_explain_response(0, 0);
3084             return;
3085         }
3086         else if (srw_pdu->which == Z_SRW_scan_request)
3087         {
3088             m_s2z_database = odr_strdup(m_s2z_odr_init,
3089                                         srw_pdu->u.scan_request->database);
3090
3091             yaz_add_srw_diagnostic(odr_decode(),
3092                                    &diagnostic, &num_diagnostic,
3093                                    4, "scan");
3094             Z_SRW_PDU *srw_pdu =
3095                 yaz_srw_get(odr_encode(),
3096                             Z_SRW_scan_response);
3097             Z_SRW_scanResponse *srw_res = srw_pdu->u.scan_response;
3098
3099             srw_res->diagnostics = diagnostic;
3100             srw_res->num_diagnostics = num_diagnostic;
3101             send_srw_response(srw_pdu);
3102             return;
3103         }
3104         else
3105         {
3106             m_s2z_database = 0;
3107
3108             send_to_srw_client_error(4, 0);
3109         }
3110     }
3111     send_http_response(400);
3112 }
3113
3114 void Yaz_Proxy::handle_init(Z_APDU *apdu)
3115 {
3116
3117     Z_OtherInformation **oi;
3118     get_otherInfoAPDU(apdu, &oi);
3119
3120     if (apdu->u.initRequest->implementationId)
3121         yaz_log(YLOG_LOG, "%simplementationId: %s",
3122                 m_session_str, apdu->u.initRequest->implementationId);
3123     if (apdu->u.initRequest->implementationName)
3124         yaz_log(YLOG_LOG, "%simplementationName: %s",
3125                 m_session_str, apdu->u.initRequest->implementationName);
3126     if (apdu->u.initRequest->implementationVersion)
3127         yaz_log(YLOG_LOG, "%simplementationVersion: %s",
3128                 m_session_str, apdu->u.initRequest->implementationVersion);
3129     if (m_initRequest_apdu == 0)
3130     {
3131         if (m_initRequest_mem)
3132             nmem_destroy(m_initRequest_mem);
3133
3134         m_initRequest_apdu = apdu;
3135         m_initRequest_mem = odr_extract_mem(odr_decode());
3136
3137         m_initRequest_preferredMessageSize = *apdu->u.initRequest->
3138             preferredMessageSize;
3139         *apdu->u.initRequest->preferredMessageSize = 1024*1024;
3140         m_initRequest_maximumRecordSize = *apdu->u.initRequest->
3141             maximumRecordSize;
3142         *apdu->u.initRequest->maximumRecordSize = 1024*1024;
3143
3144         Z_CharSetandLanguageNegotiation *charSetandLangRecord =
3145             yaz_get_charneg_record(*oi);
3146
3147         // Save proposal charsets and langs.
3148         if (ODR_MASK_GET(apdu->u.initRequest->options,
3149                          Z_Options_negotiationModel)
3150             && charSetandLangRecord)
3151         {
3152
3153             yaz_get_proposal_charneg(m_referenceId_mem,
3154                                      charSetandLangRecord,
3155                                      &m_initRequest_oi_negotiation_charsets,
3156                                      &m_initRequest_oi_negotiation_num_charsets,
3157                                      &m_initRequest_oi_negotiation_langs,
3158                                      &m_initRequest_oi_negotiation_num_langs,
3159                                      &m_initRequest_oi_negotiation_selected);
3160
3161             for (int i = 0; i<m_initRequest_oi_negotiation_num_charsets; i++)
3162             {
3163                 yaz_log(YLOG_LOG, "%scharacters set proposal: %s",
3164                         m_session_str,(m_initRequest_oi_negotiation_charsets[i])?
3165                         m_initRequest_oi_negotiation_charsets[i]:"none");
3166             }
3167             for (int i=0; i<m_initRequest_oi_negotiation_num_langs; i++)
3168             {
3169                 yaz_log(YLOG_LOG, "%slanguages proposal: %s",
3170                         m_session_str, (m_initRequest_oi_negotiation_langs[i])?
3171                         m_initRequest_oi_negotiation_langs[i]:"none");
3172             }
3173             yaz_log(YLOG_LOG, "%sselected proposal: %d (boolean)",
3174                     m_session_str, m_initRequest_oi_negotiation_selected);
3175         }
3176         // save init options for the response..
3177         m_initRequest_options = apdu->u.initRequest->options;
3178
3179         apdu->u.initRequest->options =
3180             (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
3181                                        sizeof(Odr_bitmask));
3182         ODR_MASK_ZERO(apdu->u.initRequest->options);
3183         int i;
3184         for (i = 0; i<= 24; i++)
3185             ODR_MASK_SET(apdu->u.initRequest->options, i);
3186         // check negotiation option
3187         if (!ODR_MASK_GET(m_initRequest_options,
3188                           Z_Options_negotiationModel))
3189         {
3190             ODR_MASK_CLEAR(apdu->u.initRequest->options,
3191                            Z_Options_negotiationModel);
3192         }
3193         ODR_MASK_CLEAR(apdu->u.initRequest->options,
3194                        Z_Options_concurrentOperations);
3195         // make new version
3196         m_initRequest_version = apdu->u.initRequest->protocolVersion;
3197         apdu->u.initRequest->protocolVersion =
3198             (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
3199                                        sizeof(Odr_bitmask));
3200         ODR_MASK_ZERO(apdu->u.initRequest->protocolVersion);
3201
3202         for (i = 0; i<= 8; i++)
3203             ODR_MASK_SET(apdu->u.initRequest->protocolVersion, i);
3204     }
3205     handle_charset_lang_negotiation(apdu);
3206     if (m_client->m_init_flag)
3207     {
3208         if (handle_init_response_for_invalid_session(apdu))
3209             return;
3210         if (m_client->m_initResponse)
3211         {
3212             Z_APDU *apdu2 = m_client->m_initResponse;
3213             apdu2->u.initResponse->otherInfo = 0;
3214             if (m_client->m_cookie && *m_client->m_cookie)
3215                 set_otherInformationString(apdu2, yaz_oid_userinfo_cookie,
3216                                            1, m_client->m_cookie);
3217             apdu2->u.initResponse->referenceId =
3218                 apdu->u.initRequest->referenceId;
3219             apdu2->u.initResponse->options = m_client->m_initResponse_options;
3220             apdu2->u.initResponse->protocolVersion =
3221                 m_client->m_initResponse_version;
3222
3223             handle_charset_lang_negotiation(apdu2);
3224
3225             if (m_timeout_mode == timeout_busy)
3226                 m_timeout_mode = timeout_normal;
3227             send_to_client(apdu2);
3228             return;
3229         }
3230     }
3231     m_client->m_init_flag = 1;
3232
3233     if (m_num_msg_threads && m_my_thread)
3234     {
3235         Auth_Msg *m = new Auth_Msg;
3236         m->m_proxy = this;
3237         z_APDU(odr_encode(), &apdu, 0, "encode");
3238         char *apdu_buf = odr_getbuf(odr_encode(), &m->m_apdu_len, 0);
3239         m->m_apdu_buf = (char*) nmem_malloc(m->m_nmem, m->m_apdu_len);
3240         memcpy(m->m_apdu_buf, apdu_buf, m->m_apdu_len);
3241         odr_reset(odr_encode());
3242
3243         inc_ref();
3244         m_my_thread->put(m);
3245     }
3246     else
3247     {
3248         int ret = handle_authentication(apdu);
3249         result_authentication(apdu, ret);
3250     }
3251 }
3252
3253 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
3254 {
3255     Z_ReferenceId **refid = get_referenceIdP(apdu);
3256     nmem_reset(m_referenceId_mem);
3257     if (refid && *refid)
3258     {
3259         m_referenceId = (Z_ReferenceId *)
3260             nmem_malloc(m_referenceId_mem, sizeof(*m_referenceId));
3261         m_referenceId->len = m_referenceId->size = (*refid)->len;
3262         m_referenceId->buf = (unsigned char *)
3263             nmem_malloc(m_referenceId_mem, (*refid)->len);
3264         memcpy(m_referenceId->buf, (*refid)->buf, (*refid)->len);
3265     }
3266     else
3267         m_referenceId = 0;
3268
3269     if (!m_client && m_flag_invalid_session)
3270     {
3271         // Got request for a session that is invalid..
3272         m_apdu_invalid_session = apdu; // save package
3273         m_mem_invalid_session = odr_extract_mem(odr_decode());
3274         apdu = m_initRequest_apdu;     // but throw an init to the target
3275     }
3276
3277     if (apdu->which == Z_APDU_searchRequest)
3278         m_search_stat.add_bytes(1);
3279
3280     // Handle global authentication
3281     if (!handle_global_authentication(apdu))
3282     {
3283         if (m_http_version)
3284         {   // HTTP. Send unauthorized
3285             send_http_response(401);
3286             return;
3287         }
3288         else
3289         {
3290             // Z39.50 just shutdown
3291             timeout(0);
3292             return;
3293         }
3294         return;
3295     }
3296
3297     // Determine our client.
3298     Z_OtherInformation **oi;
3299     get_otherInfoAPDU(apdu, &oi);
3300     int http_code = 404;
3301     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi), &http_code);
3302     if (!m_client)
3303     {
3304         if (m_http_version)
3305         {   // HTTP. Send not found
3306             send_http_response(http_code);
3307             return;
3308         }
3309         else
3310         {
3311             // Z39.50 just shutdown
3312             timeout(0);
3313             return;
3314         }
3315     }
3316
3317     m_client->m_server = this;
3318
3319     if (apdu->which == Z_APDU_initRequest)
3320         handle_init(apdu);
3321     else
3322         handle_incoming_Z_PDU_2(apdu);
3323 }
3324
3325 void Yaz_Proxy::handle_incoming_Z_PDU_2(Z_APDU *apdu)
3326 {
3327     handle_max_record_retrieve(apdu);
3328
3329     if (apdu)
3330         apdu = handle_syntax_validation(apdu);
3331
3332     if (apdu)
3333         apdu = handle_query_transformation(apdu);
3334
3335     if (apdu)
3336         apdu = handle_target_charset_conversion(apdu);
3337
3338     if (apdu)
3339         apdu = handle_query_validation(apdu);
3340
3341     if (apdu)
3342         apdu = result_set_optimize(apdu);
3343
3344     if (!apdu)
3345     {
3346         m_client->timeout(m_target_idletime);  // mark it active even
3347         recv_GDU_more(true);
3348         // though we didn't use it
3349         return;
3350     }
3351
3352     // delete other info construct completely if 0 elements
3353     Z_OtherInformation **oi;
3354     get_otherInfoAPDU(apdu, &oi);
3355     if (oi && *oi && (*oi)->num_elements == 0)
3356         *oi = 0;
3357
3358     if (apdu->which == Z_APDU_presentRequest &&
3359         m_client->m_resultSetStartPoint == 0)
3360     {
3361         Z_PresentRequest *pr = apdu->u.presentRequest;
3362         m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
3363         m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
3364     } else {
3365         m_client->m_resultSetStartPoint = 0;
3366     }
3367     if (m_client->send_to_target(apdu) < 0)
3368     {
3369         m_client->shutdown();
3370     }
3371     else
3372         m_client->m_waiting = 1;
3373 }
3374
3375 void Yaz_Proxy::connectNotify()
3376 {
3377 }
3378
3379 void Yaz_Proxy::releaseClient()
3380 {
3381     xfree(m_proxyTarget);
3382     m_proxyTarget = 0;
3383     m_flag_invalid_session = 0;
3384     // only keep if keep_alive flag is set...
3385     if (m_client &&
3386         m_client->m_pdu_recv < m_keepalive_limit_pdu &&
3387         m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
3388         m_client->m_waiting == 0)
3389     {
3390         yaz_log(YLOG_LOG, "%sShutdown (client to proxy) keepalive %s",
3391                  m_session_str,
3392                  m_client->get_hostname());
3393         yaz_log(YLOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
3394                 m_session_str, m_client->m_pdu_recv,
3395                 m_client->m_bytes_sent + m_client->m_bytes_recv,
3396                 m_keepalive_limit_bw, m_keepalive_limit_pdu);
3397         assert (m_client->m_waiting != 2);
3398         // Tell client (if any) that no server connection is there..
3399         m_client->m_server = 0;
3400         m_client = 0;
3401     }
3402     else if (m_client)
3403     {
3404         yaz_log(YLOG_LOG, "%sShutdown (client to proxy) close %s",
3405                  m_session_str,
3406                  m_client->get_hostname());
3407         assert (m_client->m_waiting != 2);
3408         delete m_client;
3409         m_client = 0;
3410     }
3411     else if (!m_parent)
3412     {
3413         yaz_log(YLOG_LOG, "%sshutdown (client to proxy) bad state",
3414                  m_session_str);
3415         assert (m_parent);
3416     }
3417     else
3418     {
3419         yaz_log(YLOG_LOG, "%sShutdown (client to proxy)",
3420                  m_session_str);
3421     }
3422     if (m_parent)
3423         m_parent->pre_init();
3424 }
3425
3426 bool Yaz_Proxy::dec_ref()
3427 {
3428     m_http_keepalive = 0;
3429
3430     --m_ref_count;
3431     if (m_ref_count > 0)
3432         return false;
3433
3434     releaseClient();
3435
3436     delete this;
3437     return true;
3438 }
3439
3440 const char *Yaz_ProxyClient::get_session_str()
3441 {
3442     if (!m_server)
3443         return "0 ";
3444     return m_server->get_session_str();
3445 }
3446
3447 void Yaz_ProxyClient::shutdown()
3448 {
3449     yaz_log(YLOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
3450              get_hostname());
3451
3452     if (m_server)
3453     {
3454         m_waiting = 1;   // ensure it's released from Yaz_Proxy::releaseClient
3455         m_server->dec_ref();
3456     }
3457     else
3458         delete this;
3459 }
3460
3461 void Yaz_Proxy::failNotify()
3462 {
3463     inc_request_no();
3464     yaz_log(YLOG_LOG, "%sConnection closed by client", get_session_str());
3465     dec_ref();
3466 }
3467
3468 void Yaz_Proxy::send_response_fail_client(const char *addr)
3469 {
3470     if (m_http_version)
3471     {
3472         Z_SRW_diagnostic *diagnostic = 0;
3473         int num_diagnostic = 0;
3474
3475         yaz_add_srw_diagnostic(odr_encode(),
3476                                &diagnostic, &num_diagnostic,
3477                                YAZ_SRW_SYSTEM_TEMPORARILY_UNAVAILABLE, addr);
3478         if (m_s2z_search_apdu)
3479             send_srw_search_response(diagnostic, num_diagnostic);
3480         else
3481             send_srw_explain_response(diagnostic, num_diagnostic);
3482     }
3483 }
3484
3485 void Yaz_ProxyClient::failNotify()
3486 {
3487     if (m_server)
3488         m_server->inc_request_no();
3489     yaz_log(YLOG_LOG, "%sConnection closed by target %s",
3490              get_session_str(), get_hostname());
3491
3492     if (m_server)
3493         m_server->send_response_fail_client(get_hostname());
3494     shutdown();
3495 }
3496
3497 void Yaz_ProxyClient::connectNotify()
3498 {
3499     const char *s = get_session_str();
3500     const char *h = get_hostname();
3501     yaz_log(YLOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
3502              m_target_idletime);
3503     timeout(m_target_idletime);
3504     if (!m_server)
3505         pre_init_client();
3506 }
3507
3508 IPDU_Observer *Yaz_ProxyClient::sessionNotify(IPDU_Observable
3509                                               *the_PDU_Observable, int fd)
3510 {
3511     return new Yaz_ProxyClient(the_PDU_Observable, 0);
3512 }
3513
3514 Yaz_ProxyClient::~Yaz_ProxyClient()
3515 {
3516     if (m_prev)
3517         *m_prev = m_next;
3518     if (m_next)
3519         m_next->m_prev = m_prev;
3520     m_waiting = 2;     // for debugging purposes only.
3521     odr_destroy(m_init_odr);
3522     odr_destroy(m_idAuthentication_odr);
3523     delete m_last_query;
3524     xfree(m_last_resultSetId);
3525     xfree(m_cookie);
3526 }
3527
3528 void Yaz_ProxyClient::pre_init_client()
3529 {
3530     Z_APDU *apdu = create_Z_PDU(Z_APDU_initRequest);
3531     Z_InitRequest *req = apdu->u.initRequest;
3532
3533     int i;
3534     for (i = 0; i<= 24; i++)
3535         ODR_MASK_SET(req->options, i);
3536     ODR_MASK_CLEAR(apdu->u.initRequest->options,
3537                    Z_Options_negotiationModel);
3538     ODR_MASK_CLEAR(apdu->u.initRequest->options,
3539                    Z_Options_concurrentOperations);
3540     for (i = 0; i<= 10; i++)
3541         ODR_MASK_SET(req->protocolVersion, i);
3542
3543     if (send_to_target(apdu) < 0)
3544     {
3545         delete this;
3546     }
3547     else
3548     {
3549         m_waiting = 1;
3550         m_init_flag = 1;
3551     }
3552 }
3553
3554 void Yaz_Proxy::pre_init()
3555 {
3556     int i;
3557     const char *name = 0;
3558     const char *zurl_in_use[MAX_ZURL_PLEX];
3559     int limit_bw, limit_pdu, limit_req, limit_search;
3560     int target_idletime, client_idletime;
3561     int max_sockets;
3562     int max_clients;
3563     int keepalive_limit_bw, keepalive_limit_pdu;
3564     int pre_init;
3565     const char *cql2rpn = 0;
3566     const char *authentication = 0;
3567     const char *negotiation_charset = 0;
3568     const char *negotiation_lang = 0;
3569
3570     Yaz_ProxyConfig *cfg = check_reconfigure();
3571
3572     zurl_in_use[0] = 0;
3573
3574     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
3575         set_APDU_yazlog(1);
3576     else
3577         set_APDU_yazlog(0);
3578
3579     for (i = 0; cfg && cfg->get_target_no(i, &name, zurl_in_use,
3580                                           &limit_bw, &limit_pdu, &limit_req,
3581                                           &limit_search,
3582                                           &target_idletime, &client_idletime,
3583                                           &max_sockets,
3584                                           &max_clients,
3585                                           &keepalive_limit_bw,
3586                                           &keepalive_limit_pdu,
3587                                           &pre_init,
3588                                           &cql2rpn,
3589                                           &authentication,
3590                                           &negotiation_charset,
3591                                           &negotiation_lang,
3592                                           0,
3593                                           0) ; i++)
3594     {
3595         if (pre_init)
3596         {
3597             int j;
3598             for (j = 0; zurl_in_use[j]; j++)
3599             {
3600                 Yaz_ProxyClient *c;
3601                 int spare = 0;
3602                 int spare_waiting = 0;
3603                 int in_use = 0;
3604                 int other = 0;
3605                 for (c = m_clientPool; c; c = c->m_next)
3606                 {
3607                     if (!strcmp(zurl_in_use[j], c->get_hostname()))
3608                     {
3609                         if (c->m_cookie == 0)
3610                         {
3611                             if (c->m_server == 0)
3612                                 if (c->m_waiting)
3613                                     spare_waiting++;
3614                                 else
3615                                     spare++;
3616                             else
3617                                 in_use++;
3618                         }
3619                         else
3620                             other++;
3621                     }
3622                 }
3623                 yaz_log(YLOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
3624                         "sparew=%d preinit=%d",m_session_str,
3625                         name, zurl_in_use[j], in_use, other,
3626                         spare, spare_waiting, pre_init);
3627                 if (spare + spare_waiting < pre_init
3628                     && in_use + spare + spare_waiting + other < max_sockets)
3629                 {
3630                     c = new Yaz_ProxyClient(m_PDU_Observable->clone(), this);
3631                     c->m_next = m_clientPool;
3632                     if (c->m_next)
3633                         c->m_next->m_prev = &c->m_next;
3634                     m_clientPool = c;
3635                     c->m_prev = &m_clientPool;
3636
3637                     if (m_log_mask & PROXY_LOG_APDU_SERVER)
3638                         c->set_APDU_yazlog(1);
3639                     else
3640                         c->set_APDU_yazlog(0);
3641
3642                     if (c->client(zurl_in_use[j]))
3643                     {
3644                         timeout(60);
3645                         delete c;
3646                         return;
3647                     }
3648                     c->timeout(30);
3649                     c->m_waiting = 1;
3650                     c->m_target_idletime = target_idletime;
3651                     c->m_seqno = m_seqno++;
3652                 }
3653             }
3654         }
3655     }
3656 }
3657
3658 void Yaz_Proxy::timeoutNotify()
3659 {
3660     if (m_parent)
3661     {
3662         GDU *gdu;
3663         switch(m_timeout_mode)
3664         {
3665         case timeout_normal:
3666         case timeout_busy:
3667             inc_request_no();
3668             m_in_queue.clear();
3669             yaz_log(YLOG_LOG, "%sTimeout (client to proxy)", m_session_str);
3670             dec_ref();
3671             break;
3672         case timeout_reduce:
3673             timeout(m_client_idletime);
3674             m_timeout_mode = timeout_busy;
3675             gdu = m_timeout_gdu;
3676             m_timeout_gdu = 0;
3677             recv_GDU_normal(gdu);
3678             break;
3679         case timeout_xsl:
3680             assert(m_stylesheet_nprl);
3681             convert_xsl_delay();
3682             recv_GDU_more(true);
3683         }
3684     }
3685     else
3686     {
3687         timeout(600);
3688         pre_init();
3689     }
3690 }
3691
3692 void Yaz_Proxy::markInvalid()
3693 {
3694     m_client = 0;
3695     m_flag_invalid_session = 1;
3696 }
3697
3698 void Yaz_ProxyClient::timeoutNotify()
3699 {
3700     if (m_server)
3701         m_server->inc_request_no();
3702
3703     yaz_log(YLOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
3704              get_hostname());
3705
3706     if (m_server)
3707         m_server->send_response_fail_client(get_hostname());
3708
3709     Yaz_Proxy *proxy_root = m_root;
3710
3711     shutdown();
3712
3713     proxy_root->pre_init();
3714 }
3715
3716 Yaz_ProxyClient::Yaz_ProxyClient(IPDU_Observable *the_PDU_Observable,
3717                                  Yaz_Proxy *parent) :
3718     Z_Assoc (the_PDU_Observable)
3719 {
3720     m_cookie = 0;
3721     m_next = 0;
3722     m_prev = 0;
3723     m_init_flag = 0;
3724     m_last_query = 0;
3725     m_last_resultSetId = 0;
3726     m_last_resultCount = 0;
3727     m_last_ok = 0;
3728     m_sr_transform = 0;
3729     m_waiting = 0;
3730     m_init_odr = odr_createmem (ODR_DECODE);
3731     m_initResponse = 0;
3732     m_initResponse_options = 0;
3733     m_initResponse_version = 0;
3734     m_initResponse_preferredMessageSize = 0;
3735     m_initResponse_maximumRecordSize = 0;
3736     m_resultSetStartPoint = 0;
3737     m_bytes_sent = m_bytes_recv = 0;
3738     m_pdu_recv = 0;
3739     m_server = 0;
3740     m_seqno = 0;
3741     m_target_idletime = 600;
3742     m_root = parent;
3743     m_idAuthentication_odr = odr_createmem(ODR_ENCODE);
3744     m_idAuthentication_ber_buf = 0;
3745     m_idAuthentication_ber_size = 0;
3746 }
3747
3748 const char *Yaz_Proxy::option(const char *name, const char *value)
3749 {
3750     if (!strcmp (name, "optimize")) {
3751         if (value) {
3752             xfree(m_optimize);
3753             m_optimize = xstrdup(value);
3754         }
3755         return m_optimize;
3756     }
3757     return 0;
3758 }
3759
3760 void Yaz_ProxyClient::recv_HTTP_response(Z_HTTP_Response *apdu, int len)
3761 {
3762
3763 }
3764
3765 void Yaz_ProxyClient::recv_GDU(Z_GDU *apdu, int len)
3766 {
3767     if (apdu->which == Z_GDU_Z3950)
3768         recv_Z_PDU(apdu->u.z3950, len);
3769     else if (apdu->which == Z_GDU_HTTP_Response)
3770         recv_HTTP_response(apdu->u.HTTP_Response, len);
3771     else
3772         shutdown();
3773 }
3774
3775 int Yaz_Proxy::handle_init_response_for_invalid_session(Z_APDU *apdu)
3776 {
3777     if (!m_flag_invalid_session)
3778         return 0;
3779     m_flag_invalid_session = 0;
3780     handle_incoming_Z_PDU(m_apdu_invalid_session);
3781     assert (m_mem_invalid_session);
3782     nmem_destroy(m_mem_invalid_session);
3783     m_mem_invalid_session = 0;
3784     return 1;
3785 }
3786
3787 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
3788 {
3789     m_bytes_recv += len;
3790
3791     m_pdu_recv++;
3792     m_waiting = 0;
3793     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
3794         yaz_log(YLOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
3795                  apdu_name(apdu), get_hostname(), len);
3796     if (apdu->which == Z_APDU_initResponse)
3797     {
3798         if (!m_server)  // if this is a pre init session , check for more
3799             m_root->pre_init();
3800         NMEM nmem = odr_extract_mem (odr_decode());
3801         odr_reset (m_init_odr);
3802         nmem_transfer (m_init_odr->mem, nmem);
3803         m_initResponse = apdu;
3804         m_initResponse_options = apdu->u.initResponse->options;
3805         m_initResponse_version = apdu->u.initResponse->protocolVersion;
3806         m_initResponse_preferredMessageSize =
3807             *apdu->u.initResponse->preferredMessageSize;
3808         m_initResponse_maximumRecordSize =
3809             *apdu->u.initResponse->maximumRecordSize;
3810
3811         Z_InitResponse *ir = apdu->u.initResponse;
3812
3813         // apply YAZ Proxy version
3814         char *imv0 = ir->implementationVersion;
3815         char *imv1 = (char*)
3816             odr_malloc(m_init_odr, 20 + (imv0 ? strlen(imv0) : 0));
3817         *imv1 = '\0';
3818         if (imv0)
3819             strcat(imv1, imv0);
3820 #ifdef VERSION
3821         strcat(imv1, "/" VERSION);
3822 #endif
3823         ir->implementationVersion = imv1;
3824
3825         // apply YAZ Proxy implementation name
3826         char *im0 = ir->implementationName;
3827         char *im1 = (char*)
3828             odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
3829         *im1 = '\0';
3830         if (im0)
3831         {
3832             strcat(im1, im0);
3833             strcat(im1, " ");
3834         }
3835         strcat(im1, "(YAZ Proxy)");
3836         ir->implementationName = im1;
3837
3838         nmem_destroy (nmem);
3839
3840         if (m_server && m_server->handle_init_response_for_invalid_session(apdu))
3841             return;
3842     }
3843     if (apdu->which == Z_APDU_searchResponse)
3844     {
3845         Z_SearchResponse *sr = apdu->u.searchResponse;
3846         m_last_resultCount = *sr->resultCount;
3847         int status = *sr->searchStatus;
3848         if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
3849         {
3850             m_last_ok = 1;
3851
3852             if (sr->records && sr->records->which == Z_Records_DBOSD)
3853             {
3854                 m_cache.add(odr_decode(),
3855                             sr->records->u.databaseOrSurDiagnostics, 1,
3856                             *sr->resultCount);
3857             }
3858         }
3859     }
3860     if (apdu->which == Z_APDU_presentResponse)
3861     {
3862         Z_PresentResponse *pr = apdu->u.presentResponse;
3863         if (m_sr_transform)
3864         {
3865             m_sr_transform = 0;
3866             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
3867             Z_SearchResponse *sr = new_apdu->u.searchResponse;
3868             sr->referenceId = pr->referenceId;
3869             *sr->resultCount = m_last_resultCount;
3870             sr->records = pr->records;
3871             sr->nextResultSetPosition = pr->nextResultSetPosition;
3872             sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
3873             apdu = new_apdu;
3874         }
3875         if (pr->records &&
3876             pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
3877         {
3878             m_cache.add(odr_decode(),
3879                         pr->records->u.databaseOrSurDiagnostics,
3880                         m_resultSetStartPoint, -1);
3881             m_resultSetStartPoint = 0;
3882         }
3883     }
3884     if (m_cookie)
3885         set_otherInformationString(apdu, yaz_oid_userinfo_cookie, 1, m_cookie);
3886
3887     Yaz_Proxy *server = m_server; // save it. send_to_client may destroy us
3888
3889     if (server)
3890         server->send_to_client(apdu);
3891     if (apdu->which == Z_APDU_close)
3892         shutdown();
3893     else if (server)
3894         server->recv_GDU_more(true);
3895 }
3896
3897 void Yaz_Proxy::low_socket_close()
3898 {
3899 #if WIN32
3900 #else
3901     int i;
3902     for (i = 0; i<NO_SPARE_SOLARIS_FD; i++)
3903         if  (m_lo_fd[i] >= 0)
3904             ::close(m_lo_fd[i]);
3905 #endif
3906 }
3907
3908 void Yaz_Proxy::low_socket_open()
3909 {
3910 #if WIN32
3911 #else
3912     int i;
3913     for (i = 0; i<NO_SPARE_SOLARIS_FD; i++)
3914         m_lo_fd[i] = open("/dev/null", O_RDONLY);
3915 #endif
3916 }
3917
3918 int Yaz_Proxy::server(const char *addr)
3919 {
3920     int r = Z_Assoc::server(addr);
3921     if (!r)
3922     {
3923         yaz_log(YLOG_LOG, "%sStarted proxy "
3924 #ifdef VERSION
3925             VERSION
3926 #endif
3927             " on %s", m_session_str, addr);
3928         timeout(1);
3929     }
3930     return r;
3931 }
3932
3933 void Yaz_Proxy::base64_decode(const char *base64, char *buf, int buf_len)
3934 {
3935     const char *base64_chars =
3936         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
3937     int len = strlen(base64);
3938     int buf_pos = 0;
3939     int index = 1;
3940
3941     for (int pos = 0; pos <= len; pos++)
3942     {
3943         if (base64[pos] == '=' || buf_pos + 1 >= buf_len)
3944             break;
3945
3946         const char *ch_ptr = strchr(base64_chars, base64[pos]);
3947         if (!ch_ptr)
3948             break;
3949         char ch = (char) (ch_ptr - base64_chars);
3950         switch (index)
3951         {
3952         case 1:
3953             buf[buf_pos] = ch << 2;
3954             break;
3955         case 2:
3956             buf[buf_pos++] += (ch & 0x30) >> 4;
3957             buf[buf_pos] = (ch & 0x0f) << 4;
3958             break;
3959         case 3:
3960             buf[buf_pos++] += (ch & 0x3c) >> 2;
3961             buf[buf_pos] = (ch & 0x03) << 6;
3962             break;
3963         case 4:
3964             buf[buf_pos++] += ch;
3965         }
3966         if (index < 4)
3967             index++;
3968         else
3969             index = 1;
3970     }
3971     buf[buf_pos] = '\0';
3972 }
3973
3974 /*
3975  * Local variables:
3976  * c-basic-offset: 4
3977  * c-file-style: "Stroustrup"
3978  * indent-tabs-mode: nil
3979  * End:
3980  * vim: shiftwidth=4 tabstop=8 expandtab
3981  */
3982