/* * Copyright (c) 1995-2001, Index Data * See the file LICENSE for details. * * $Log: seshigh.c,v $ * Revision 1.117 2001-06-13 20:47:40 adam * When error is returned from present handler, non-surrogate diagnostic * is returned in present response (and fetch handler is no longer called). * * Revision 1.116 2001/05/16 07:21:36 adam * Accept any OID for record syntax. * * Revision 1.115 2001/03/25 21:55:12 adam * Added odr_intdup. Ztest server returns TaskPackage for ItemUpdate. * * Revision 1.114 2001/02/21 13:46:53 adam * C++ fixes. * * Revision 1.113 2001/01/30 21:34:17 adam * Added step-size for Scan backend interface. * * Revision 1.112 2001/01/29 09:38:22 adam * Fixed bug that made the frontend server crash when no attribute set * was specified for scan. * * Revision 1.111 2000/11/23 10:58:32 adam * SSL comstack support. Separate POSIX thread support library. * * Revision 1.110 2000/10/02 13:05:32 adam * Fixed bug introduced by previous commit. * * Revision 1.109 2000/10/02 11:07:44 adam * Added peer_name member for bend_init handler. Changed the YAZ * client so that tcp: can be avoided in target spec. * * Revision 1.108 2000/09/04 08:58:15 adam * Added prefix yaz_ for most logging utility functions. * * Revision 1.107 2000/08/31 10:20:12 adam * Added member request_format and output_format for backend fetch method. * * Revision 1.106 2000/08/31 09:51:25 adam * Added record_syntax member for fetch method (raw OID). * * Revision 1.105 2000/07/06 10:38:47 adam * Enhanced option --enable-tcpd. * * Revision 1.104 2000/04/05 07:39:55 adam * Added shared library support (libtool). * * Revision 1.103 2000/03/20 19:06:25 adam * Added Segment request for fronend server. Work on admin for client. * * Revision 1.102 2000/03/15 12:59:49 adam * Added handle member to statserv_control. * * Revision 1.101 2000/01/12 14:36:07 adam * Added printing stream (ODR) for backend functions. * * Revision 1.100 1999/12/16 23:36:19 adam * Implemented ILL protocol. Minor updates ASN.1 compiler. * * Revision 1.99 1999/11/30 13:47:12 adam * Improved installation. Moved header files to include/yaz. * * Revision 1.98 1999/11/29 15:12:27 adam * Changed the way implementationName - and version is set. * * Revision 1.96 1999/11/04 14:58:44 adam * Added status elements for backend delete result set handler. * Updated delete result result set command for client. * * Revision 1.95 1999/10/11 10:01:24 adam * Implemented bend_sort_rr handler for frontend server. * * Revision 1.94 1999/08/27 09:40:32 adam * Renamed logf function to yaz_log. Removed VC++ project files. * * Revision 1.93 1999/07/06 12:17:15 adam * Added option -1 that runs server once (for profiling purposes). * * Revision 1.92 1999/06/17 10:54:45 adam * Added facility to specify implementation version - and name * for server. * * Revision 1.91 1999/06/01 14:29:12 adam * Work on Extended Services. * * Revision 1.90 1999/05/27 13:02:20 adam * Assigned OID for old DB Update (VAL_DBUPDATE0). * * Revision 1.89 1999/05/26 15:24:26 adam * Fixed minor bugs regarding DB Update (introduced by previous commit). * * Revision 1.88 1999/04/20 09:56:48 adam * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun). * Modified all encoders/decoders to reflect this change. * * Revision 1.87 1999/03/31 11:18:25 adam * Implemented odr_strdup. Added Reference ID to backend server API. * * Revision 1.86 1999/02/02 13:57:38 adam * Uses preprocessor define WIN32 instead of WINDOWS to build code * for Microsoft WIN32. * * Revision 1.85 1998/11/17 09:52:59 adam * Fixed minor bug (introduced by previous commit). * * Revision 1.84 1998/11/16 16:02:32 adam * Added loggin utilies, log_rpn_query and log_scan_term. These used * to be part of Zebra. * * Revision 1.83 1998/11/03 10:09:36 adam * Fixed bug regarding YC. * * Revision 1.82 1998/10/20 14:00:30 quinn * Fixed Scan * * Revision 1.81 1998/10/13 16:12:24 adam * Added support for Surrogate Diagnostics for Scan Term entries. * * Revision 1.80 1998/09/02 12:41:53 adam * Added decode stream in bend search structures. * * Revision 1.79 1998/08/19 16:10:08 adam * Changed som member names of DeleteResultSetRequest/Response. * * Revision 1.78 1998/08/03 10:23:55 adam * Fixed bug regarding Options for Sort. * * Revision 1.77 1998/07/20 12:38:42 adam * Implemented delete result set service to server API. * * Revision 1.76 1998/05/27 16:57:07 adam * Support for surrogate diagnostic records added for bend_fetch. * * Revision 1.75 1998/05/18 10:13:07 adam * Fixed call to es_request handler - extra argument was passed. * * Revision 1.74 1998/03/31 15:13:20 adam * Development towards compiled ASN.1. * * Revision 1.73 1998/03/31 11:07:45 adam * Furhter work on UNIverse resource report. * Added Extended Services handling in frontend server. * * Revision 1.72 1998/02/11 11:53:35 adam * Changed code so that it compiles as C++. * * Revision 1.71 1998/02/10 11:03:57 adam * Added support for extended handlers in backend server interface. * * Revision 1.70 1998/01/29 13:15:35 adam * Implemented sort for the backend interface. * * Revision 1.69 1997/09/30 11:48:12 adam * Fixed bug introduced by previous commit. * * Revision 1.68 1997/09/29 13:18:59 adam * Added function, oid_ent_to_oid, to replace the function * oid_getoidbyent, which is not thread safe. * * Revision 1.67 1997/09/17 12:10:40 adam * YAZ version 1.4. * * Revision 1.66 1997/09/05 15:26:44 adam * Added ODR encode in search and scen bend request structures. * Fixed a few enums that caused trouble with C++. * * Revision 1.65 1997/09/01 08:53:01 adam * New windows NT/95 port using MSV5.0. The test server 'ztest' was * moved a separate directory. MSV5.0 project server.dsp created. * As an option, the server can now operate as an NT service. * * Revision 1.64 1997/04/30 08:52:11 quinn * Null * * Revision 1.63 1996/10/11 11:57:26 quinn * Smallish * * Revision 1.62 1996/07/06 19:58:35 quinn * System headerfiles gathered in yconfig * * Revision 1.61 1996/06/10 08:56:16 quinn * Work on Summary. * * Revision 1.60 1996/05/30 11:03:10 quinn * Fixed NextresultSetPosition bug fixed. * * Revision 1.59 1996/05/14 09:26:46 quinn * Added attribute set to scan backend * * Revision 1.58 1996/02/20 12:53:04 quinn * Chanes to SCAN * * Revision 1.57 1996/01/02 08:57:47 quinn * Changed enums in the ASN.1 .h files to #defines. Changed oident.class to oclass * * Revision 1.56 1995/12/14 11:09:57 quinn * Work on Explain * * Revision 1.55 1995/11/08 17:41:37 quinn * Smallish. * * Revision 1.54 1995/11/08 15:11:29 quinn * Log of close transmit. * * Revision 1.53 1995/11/01 13:54:58 quinn * Minor adjustments * * Revision 1.52 1995/11/01 12:19:13 quinn * Second attempt to fix same bug. * * Revision 1.50 1995/10/25 16:58:32 quinn * Simple. * * Revision 1.49 1995/10/16 13:51:53 quinn * Changes to provide Especs to the backend. * * Revision 1.48 1995/10/06 08:51:20 quinn * Added Write-buffer. * * Revision 1.47 1995/08/29 14:24:16 quinn * Added second half of close-handshake * * Revision 1.46 1995/08/29 11:17:58 quinn * Added code to receive close * * Revision 1.45 1995/08/21 09:11:00 quinn * Smallish fixes to suppport new formats. * * Revision 1.44 1995/08/17 12:45:25 quinn * Fixed minor problems with GRS-1. Added support in c&s. * * Revision 1.43 1995/08/15 12:00:31 quinn * Updated External * * Revision 1.42 1995/08/15 11:16:50 quinn * * Revision 1.41 1995/08/02 10:23:06 quinn * Smallish * * Revision 1.40 1995/07/31 14:34:26 quinn * Fixed bug in process_searchResponse (numberOfRecordsReturned). * * Revision 1.39 1995/06/27 13:21:00 quinn * SUTRS support * * Revision 1.38 1995/06/19 12:39:11 quinn * Fixed bug in timeout code. Added BER dumper. * * Revision 1.37 1995/06/16 13:16:14 quinn * Fixed Defaultdiagformat. * * Revision 1.36 1995/06/16 10:31:36 quinn * Added session timeout. * * Revision 1.35 1995/06/15 07:45:14 quinn * Moving to v3. * * Revision 1.34 1995/06/14 15:26:46 quinn * *** empty log message *** * * Revision 1.33 1995/06/06 14:57:05 quinn * Better diagnostics. * * Revision 1.32 1995/06/06 08:41:44 quinn * Better diagnostics. * * Revision 1.31 1995/06/06 08:15:37 quinn * Cosmetic. * * Revision 1.30 1995/06/05 10:53:32 quinn * Added a better SCAN. * * Revision 1.29 1995/06/01 11:25:03 quinn * Smallish. * * Revision 1.28 1995/06/01 11:21:01 quinn * Attempting to fix a bug in pack-records. replaced break with continue * for large records, according to standard. * * Revision 1.27 1995/05/29 08:12:06 quinn * Moved oid to util * * Revision 1.26 1995/05/18 13:02:12 quinn * Smallish. * * Revision 1.25 1995/05/17 08:42:26 quinn * Transfer auth info to backend. Allow backend to reject init gracefully. * * Revision 1.24 1995/05/16 08:51:04 quinn * License, documentation, and memory fixes * * Revision 1.23 1995/05/15 13:25:10 quinn * Fixed memory bug. * * Revision 1.22 1995/05/15 11:56:39 quinn * Asynchronous facilities. Restructuring of seshigh code. * * Revision 1.21 1995/05/02 08:53:19 quinn * Trying in vain to fix comm with ISODE * * Revision 1.20 1995/04/20 15:13:00 quinn * Cosmetic * * Revision 1.19 1995/04/18 08:15:34 quinn * Added dynamic memory allocation on encoding (whew). Code is now somewhat * neater. We'll make the same change for decoding one day. * * Revision 1.18 1995/04/17 11:28:25 quinn * Smallish * * Revision 1.17 1995/04/10 10:23:36 quinn * Some work to add scan and other things. * * Revision 1.16 1995/03/31 09:18:55 quinn * Added logging. * * Revision 1.15 1995/03/30 14:03:23 quinn * Added RFC1006 as separate library * * Revision 1.14 1995/03/30 12:18:17 quinn * Fixed bug. * * Revision 1.13 1995/03/30 09:09:24 quinn * Added state-handle and some support for asynchronous activities. * * Revision 1.12 1995/03/29 15:40:16 quinn * Ongoing work. Statserv is now dynamic by default * * Revision 1.11 1995/03/28 09:16:21 quinn * Added record packing to the search request * * Revision 1.10 1995/03/27 08:34:24 quinn * Added dynamic server functionality. * Released bindings to session.c (is now redundant) * * Revision 1.9 1995/03/22 15:01:26 quinn * Adjusting record packing. * * Revision 1.8 1995/03/22 10:13:21 quinn * Working on record packer * * Revision 1.7 1995/03/21 15:53:31 quinn * Little changes. * * Revision 1.6 1995/03/21 12:30:09 quinn * Beginning to add support for record packing. * * Revision 1.5 1995/03/17 10:44:13 quinn * Added catch of null-string in makediagrec * * Revision 1.4 1995/03/17 10:18:08 quinn * Added memory management. * * Revision 1.3 1995/03/16 17:42:39 quinn * Little changes * * Revision 1.2 1995/03/16 13:29:01 quinn * Partitioned server. * * Revision 1.1 1995/03/15 16:02:10 quinn * Modded session.c to seshigh.c * */ /* * Frontend server logic. * * This code receives incoming APDUs, and handles client requests by means * of the backend API. * * Some of the code is getting quite involved, compared to simpler servers - * primarily because it is asynchronous both in the communication with * the user and the backend. We think the complexity will pay off in * the form of greater flexibility when more asynchronous facilities * are implemented. * * Memory management has become somewhat involved. In the simple case, where * only one PDU is pending at a time, it will simply reuse the same memory, * once it has found its working size. When we enable multiple concurrent * operations, perhaps even with multiple parallel calls to the backend, it * will maintain a pool of buffers for encoding and decoding, trying to * minimize memory allocation/deallocation during normal operation. * * TODOs include (and will be done in order of public interest): * * Support for EXPLAIN - provide simple meta-database system. * Support for access control. * Support for resource control. * Support for extended services - primarily Item Order. * Rest of Z39.50-1994 * */ #include #include #ifdef WIN32 #include #else #include #endif #include #include #include #include #include "eventl.h" #include "session.h" #include #include #include #include #include #include static int process_request(association *assoc, request *req, char **msg); void backend_response(IOCHAN i, int event); static int process_response(association *assoc, request *req, Z_APDU *res); static Z_APDU *process_initRequest(association *assoc, request *reqb); static Z_APDU *process_searchRequest(association *assoc, request *reqb, int *fd); static Z_APDU *response_searchRequest(association *assoc, request *reqb, bend_search_rr *bsrr, int *fd); static Z_APDU *process_presentRequest(association *assoc, request *reqb, int *fd); static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd); static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd); static void process_close(association *assoc, request *reqb); void save_referenceId (request *reqb, Z_ReferenceId *refid); static Z_APDU *process_deleteRequest(association *assoc, request *reqb, int *fd); static Z_APDU *process_segmentRequest (association *assoc, request *reqb); static FILE *apduf = 0; /* for use in static mode */ static statserv_options_block *control_block = 0; /* Chas: Added in from DALI */ static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd); /* Chas: End of addition from DALI */ /* * Create and initialize a new association-handle. * channel : iochannel for the current line. * link : communications channel. * Returns: 0 or a new association handle. */ association *create_association(IOCHAN channel, COMSTACK link) { association *anew; if (!control_block) control_block = statserv_getcontrol(); if (!(anew = (association *)xmalloc(sizeof(*anew)))) return 0; anew->init = 0; anew->client_chan = channel; anew->client_link = link; anew->cs_get_mask = 0; anew->cs_put_mask = 0; anew->cs_accept_mask = 0; if (!(anew->decode = odr_createmem(ODR_DECODE)) || !(anew->encode = odr_createmem(ODR_ENCODE))) return 0; if (*control_block->apdufile) { char filename[256]; FILE *f; strcpy(filename, control_block->apdufile); if (!(anew->print = odr_createmem(ODR_PRINT))) return 0; if (*control_block->apdufile != '-') { strcpy(filename, control_block->apdufile); if (!control_block->dynamic) { if (!apduf) { if (!(apduf = fopen(filename, "w"))) { yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename); return 0; } setvbuf(apduf, 0, _IONBF, 0); } f = apduf; } else { sprintf(filename + strlen(filename), ".%d", getpid()); if (!(f = fopen(filename, "w"))) { yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename); return 0; } setvbuf(f, 0, _IONBF, 0); } odr_setprint(anew->print, f); } } else anew->print = 0; anew->input_buffer = 0; anew->input_buffer_len = 0; anew->backend = 0; anew->state = ASSOC_NEW; request_initq(&anew->incoming); request_initq(&anew->outgoing); anew->proto = cs_getproto(link); return anew; } /* * Free association and release resources. */ void destroy_association(association *h) { statserv_options_block *cb = statserv_getcontrol(); xfree(h->init); odr_destroy(h->decode); odr_destroy(h->encode); if (h->print) odr_destroy(h->print); if (h->input_buffer) xfree(h->input_buffer); if (h->backend) (*cb->bend_close)(h->backend); while (request_deq(&h->incoming)); while (request_deq(&h->outgoing)); request_delq(&h->incoming); request_delq(&h->outgoing); xfree(h); if (control_block && control_block->one_shot) exit (0); } static void do_close_req(association *a, int reason, char *message, request *req) { Z_APDU apdu; Z_Close *cls = zget_Close(a->encode); /* Purge request queue */ while (request_deq(&a->incoming)); while (request_deq(&a->outgoing)); if (a->version >= 3) { yaz_log(LOG_LOG, "Sending Close PDU, reason=%d, message=%s", reason, message ? message : "none"); apdu.which = Z_APDU_close; apdu.u.close = cls; *cls->closeReason = reason; cls->diagnosticInformation = message; process_response(a, req, &apdu); iochan_settimeout(a->client_chan, 60); } else { yaz_log(LOG_DEBUG, "v2 client. No Close PDU"); iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */ } a->state = ASSOC_DEAD; } static void do_close(association *a, int reason, char *message) { do_close_req (a, reason, message, request_get(&a->outgoing)); } /* * This is where PDUs from the client are read and the further * processing is initiated. Flow of control moves down through the * various process_* functions below, until the encoded result comes back up * to the output handler in here. * * h : the I/O channel that has an outstanding event. * event : the current outstanding event. */ void ir_session(IOCHAN h, int event) { int res; association *assoc = (association *)iochan_getdata(h); COMSTACK conn = assoc->client_link; request *req; assert(h && conn && assoc); if (event == EVENT_TIMEOUT) { if (assoc->state != ASSOC_UP) { yaz_log(LOG_LOG, "Final timeout - closing connection."); cs_close(conn); destroy_association(assoc); iochan_destroy(h); } else { yaz_log(LOG_LOG, "Session idle too long. Sending close."); do_close(assoc, Z_Close_lackOfActivity, 0); } return; } if (event & assoc->cs_accept_mask) { yaz_log (LOG_DEBUG, "ir_session (accept)"); if (!cs_accept (conn)) { yaz_log (LOG_LOG, "accept failed"); destroy_association(assoc); iochan_destroy(h); } iochan_clearflag (h, EVENT_OUTPUT|EVENT_OUTPUT); if (conn->io_pending) { /* cs_accept didn't complete */ assoc->cs_accept_mask = ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) | ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0); iochan_setflag (h, assoc->cs_accept_mask); } else { /* cs_accept completed. Prepare for reading (cs_get) */ assoc->cs_accept_mask = 0; assoc->cs_get_mask = EVENT_INPUT; iochan_setflag (h, assoc->cs_get_mask); } return; } if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */ { if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask)) { yaz_log(LOG_DEBUG, "ir_session (input)"); /* We aren't speaking to this fellow */ if (assoc->state == ASSOC_DEAD) { yaz_log(LOG_LOG, "Closed connection after reject"); cs_close(conn); destroy_association(assoc); iochan_destroy(h); return; } assoc->cs_get_mask = EVENT_INPUT; if ((res = cs_get(conn, &assoc->input_buffer, &assoc->input_buffer_len)) <= 0) { yaz_log(LOG_LOG, "Connection closed by client"); cs_close(conn); destroy_association(assoc); iochan_destroy(h); return; } else if (res == 1) /* incomplete read - wait for more */ { if (conn->io_pending & CS_WANT_WRITE) assoc->cs_get_mask |= EVENT_OUTPUT; iochan_setflag(h, assoc->cs_get_mask); return; } if (cs_more(conn)) /* more stuff - call us again later, please */ iochan_setevent(h, EVENT_INPUT); /* we got a complete PDU. Let's decode it */ yaz_log(LOG_DEBUG, "Got PDU, %d bytes", res); req = request_get(&assoc->incoming); /* get a new request structure */ odr_reset(assoc->decode); odr_setbuf(assoc->decode, assoc->input_buffer, res, 0); if (!z_APDU(assoc->decode, &req->request, 0, 0)) { yaz_log(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ", odr_errmsg(odr_geterror(assoc->decode)), odr_offset(assoc->decode)); yaz_log(LOG_LOG, "PDU dump:"); odr_dumpBER(yaz_log_file(), assoc->input_buffer, res); do_close(assoc, Z_Close_protocolError, "Malformed package"); return; } req->request_mem = odr_extract_mem(assoc->decode); if (assoc->print && !z_APDU(assoc->print, &req->request, 0, 0)) { yaz_log(LOG_WARN, "ODR print error: %s", odr_errmsg(odr_geterror(assoc->print))); odr_reset(assoc->print); } request_enq(&assoc->incoming, req); } /* can we do something yet? */ req = request_head(&assoc->incoming); if (req->state == REQUEST_IDLE) { char *msg; request_deq(&assoc->incoming); if (process_request(assoc, req, &msg) < 0) do_close_req(assoc, Z_Close_systemProblem, msg, req); } } if (event & assoc->cs_put_mask) { request *req = request_head(&assoc->outgoing); assoc->cs_put_mask = 0; yaz_log(LOG_DEBUG, "ir_session (output)"); req->state = REQUEST_PENDING; switch (res = cs_put(conn, req->response, req->len_response)) { case -1: yaz_log(LOG_LOG, "Connection closed by client"); cs_close(conn); destroy_association(assoc); iochan_destroy(h); break; case 0: /* all sent - release the request structure */ yaz_log(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response); nmem_destroy(req->request_mem); request_deq(&assoc->outgoing); request_release(req); if (!request_head(&assoc->outgoing)) { /* restore mask for cs_get operation ... */ iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT); iochan_setflag(h, assoc->cs_get_mask); } break; default: if (conn->io_pending & CS_WANT_WRITE) assoc->cs_put_mask |= EVENT_OUTPUT; if (conn->io_pending & CS_WANT_READ) assoc->cs_put_mask |= EVENT_INPUT; iochan_setflag(h, assoc->cs_put_mask); } } if (event & EVENT_EXCEPT) { yaz_log(LOG_LOG, "ir_session (exception)"); cs_close(conn); destroy_association(assoc); iochan_destroy(h); } } /* * Initiate request processing. */ static int process_request(association *assoc, request *req, char **msg) { int fd = -1; Z_APDU *res; int retval; *msg = "Unknown Error"; assert(req && req->state == REQUEST_IDLE); if (req->request->which != Z_APDU_initRequest && !assoc->init) { *msg = "Missing InitRequest"; return -1; } switch (req->request->which) { case Z_APDU_initRequest: res = process_initRequest(assoc, req); break; case Z_APDU_searchRequest: res = process_searchRequest(assoc, req, &fd); break; case Z_APDU_presentRequest: res = process_presentRequest(assoc, req, &fd); break; case Z_APDU_scanRequest: if (assoc->init->bend_scan) res = process_scanRequest(assoc, req, &fd); else { *msg = "Cannot handle Scan APDU"; return -1; } break; case Z_APDU_extendedServicesRequest: if (assoc->init->bend_esrequest) res = process_ESRequest(assoc, req, &fd); else { *msg = "Cannot handle Extended Services APDU"; return -1; } break; case Z_APDU_sortRequest: if (assoc->init->bend_sort) res = process_sortRequest(assoc, req, &fd); else { *msg = "Cannot handle Sort APDU"; return -1; } break; case Z_APDU_close: process_close(assoc, req); return 0; case Z_APDU_deleteResultSetRequest: if (assoc->init->bend_delete) res = process_deleteRequest(assoc, req, &fd); else { *msg = "Cannot handle Delete APDU"; return -1; } break; case Z_APDU_segmentRequest: if (assoc->init->bend_segment) { res = process_segmentRequest (assoc, req); } else { *msg = "Cannot handle Segment APDU"; return -1; } break; default: *msg = "Bad APDU received"; return -1; } if (res) { yaz_log(LOG_DEBUG, " result immediately available"); retval = process_response(assoc, req, res); } else if (fd < 0) { yaz_log(LOG_DEBUG, " result unavailble"); retval = 0; } else /* no result yet - one will be provided later */ { IOCHAN chan; /* Set up an I/O handler for the fd supplied by the backend */ yaz_log(LOG_DEBUG, " establishing handler for result"); req->state = REQUEST_PENDING; if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT))) abort(); iochan_setdata(chan, assoc); retval = 0; } return retval; } /* * Handle message from the backend. */ void backend_response(IOCHAN i, int event) { association *assoc = (association *)iochan_getdata(i); request *req = request_head(&assoc->incoming); Z_APDU *res; int fd; yaz_log(LOG_DEBUG, "backend_response"); assert(assoc && req && req->state != REQUEST_IDLE); /* determine what it is we're waiting for */ switch (req->request->which) { case Z_APDU_searchRequest: res = response_searchRequest(assoc, req, 0, &fd); break; #if 0 case Z_APDU_presentRequest: res = response_presentRequest(assoc, req, 0, &fd); break; case Z_APDU_scanRequest: res = response_scanRequest(assoc, req, 0, &fd); break; #endif default: yaz_log(LOG_WARN, "Serious programmer's lapse or bug"); abort(); } if ((res && process_response(assoc, req, res) < 0) || fd < 0) { yaz_log(LOG_LOG, "Fatal error when talking to backend"); do_close(assoc, Z_Close_systemProblem, 0); iochan_destroy(i); return; } else if (!res) /* no result yet - try again later */ { yaz_log(LOG_DEBUG, " no result yet"); iochan_setfd(i, fd); /* in case fd has changed */ } } /* * Encode response, and transfer the request structure to the outgoing queue. */ static int process_response(association *assoc, request *req, Z_APDU *res) { odr_setbuf(assoc->encode, req->response, req->size_response, 1); if (assoc->print && !z_APDU(assoc->print, &res, 0, 0)) { yaz_log(LOG_WARN, "ODR print error: %s", odr_errmsg(odr_geterror(assoc->print))); odr_reset(assoc->print); } if (!z_APDU(assoc->encode, &res, 0, 0)) { yaz_log(LOG_WARN, "ODR error when encoding response: %s", odr_errmsg(odr_geterror(assoc->decode))); return -1; } req->response = odr_getbuf(assoc->encode, &req->len_response, &req->size_response); odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */ odr_reset(assoc->encode); req->state = REQUEST_IDLE; request_enq(&assoc->outgoing, req); /* turn the work over to the ir_session handler */ iochan_setflag(assoc->client_chan, EVENT_OUTPUT); assoc->cs_put_mask = EVENT_OUTPUT; /* Is there more work to be done? give that to the input handler too */ #if 1 if (request_head(&assoc->incoming)) { yaz_log (LOG_DEBUG, "more work to be done"); iochan_setevent(assoc->client_chan, EVENT_WORK); } #endif return 0; } /* * Handle init request. * At the moment, we don't check the options * anywhere else in the code - we just try not to do anything that would * break a naive client. We'll toss 'em into the association block when * we need them there. */ static Z_APDU *process_initRequest(association *assoc, request *reqb) { statserv_options_block *cb = statserv_getcontrol(); Z_InitRequest *req = reqb->request->u.initRequest; Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse); Z_InitResponse *resp = apdu->u.initResponse; bend_initresult *binitres; char options[100]; xfree (assoc->init); assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init)); yaz_log(LOG_LOG, "Got initRequest"); if (req->implementationId) yaz_log(LOG_LOG, "Id: %s", req->implementationId); if (req->implementationName) yaz_log(LOG_LOG, "Name: %s", req->implementationName); if (req->implementationVersion) yaz_log(LOG_LOG, "Version: %s", req->implementationVersion); assoc->init->stream = assoc->encode; assoc->init->print = assoc->print; assoc->init->auth = req->idAuthentication; assoc->init->referenceId = req->referenceId; assoc->init->implementation_version = 0; assoc->init->implementation_name = 0; assoc->init->bend_sort = NULL; assoc->init->bend_search = NULL; assoc->init->bend_present = NULL; assoc->init->bend_esrequest = NULL; assoc->init->bend_delete = NULL; assoc->init->bend_scan = NULL; assoc->init->bend_segment = NULL; assoc->init->bend_fetch = NULL; assoc->init->peer_name = odr_strdup (assoc->encode, cs_addrstr(assoc->client_link)); if (!(binitres = (*cb->bend_init)(assoc->init))) { yaz_log(LOG_WARN, "Bad response from backend."); return 0; } assoc->backend = binitres->handle; if ((assoc->init->bend_sort)) yaz_log (LOG_DEBUG, "Sort handler installed"); if ((assoc->init->bend_search)) yaz_log (LOG_DEBUG, "Search handler installed"); if ((assoc->init->bend_present)) yaz_log (LOG_DEBUG, "Present handler installed"); if ((assoc->init->bend_esrequest)) yaz_log (LOG_DEBUG, "ESRequest handler installed"); if ((assoc->init->bend_delete)) yaz_log (LOG_DEBUG, "Delete handler installed"); if ((assoc->init->bend_scan)) yaz_log (LOG_DEBUG, "Scan handler installed"); if ((assoc->init->bend_segment)) yaz_log (LOG_DEBUG, "Segment handler installed"); resp->referenceId = req->referenceId; *options = '\0'; /* let's tell the client what we can do */ if (ODR_MASK_GET(req->options, Z_Options_search)) { ODR_MASK_SET(resp->options, Z_Options_search); strcat(options, "srch"); } if (ODR_MASK_GET(req->options, Z_Options_present)) { ODR_MASK_SET(resp->options, Z_Options_present); strcat(options, " prst"); } if (ODR_MASK_GET(req->options, Z_Options_delSet) && assoc->init->bend_delete) { ODR_MASK_SET(resp->options, Z_Options_delSet); strcat(options, " del"); } if (ODR_MASK_GET(req->options, Z_Options_extendedServices) && assoc->init->bend_esrequest) { ODR_MASK_SET(resp->options, Z_Options_extendedServices); strcat (options, " extendedServices"); } if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)) { ODR_MASK_SET(resp->options, Z_Options_namedResultSets); strcat(options, " namedresults"); } if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan) { ODR_MASK_SET(resp->options, Z_Options_scan); strcat(options, " scan"); } if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations)) { ODR_MASK_SET(resp->options, Z_Options_concurrentOperations); strcat(options, " concurop"); } if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort) { ODR_MASK_SET(resp->options, Z_Options_sort); strcat(options, " sort"); } if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1)) { ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1); assoc->version = 2; /* 1 & 2 are equivalent */ } if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2)) { ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2); assoc->version = 2; } if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3)) { ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3); assoc->version = 3; } yaz_log(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options); assoc->maximumRecordSize = *req->maximumRecordSize; if (assoc->maximumRecordSize > control_block->maxrecordsize) assoc->maximumRecordSize = control_block->maxrecordsize; assoc->preferredMessageSize = *req->preferredMessageSize; if (assoc->preferredMessageSize > assoc->maximumRecordSize) assoc->preferredMessageSize = assoc->maximumRecordSize; #if 0 assoc->maximumRecordSize = 3000000; assoc->preferredMessageSize = 3000000; #endif resp->preferredMessageSize = &assoc->preferredMessageSize; resp->maximumRecordSize = &assoc->maximumRecordSize; resp->implementationName = "GFS"; if (assoc->init->implementation_name) { char *nv = (char *) odr_malloc (assoc->encode, strlen(assoc->init->implementation_name) + 10 + strlen(resp->implementationName)); sprintf (nv, "%s / %s", resp->implementationName, assoc->init->implementation_name); resp->implementationName = nv; } if (assoc->init->implementation_version) { char *nv = (char *) odr_malloc (assoc->encode, strlen(assoc->init->implementation_version) + 10 + strlen(resp->implementationVersion)); sprintf (nv, "YAZ %s / %s", resp->implementationVersion, assoc->init->implementation_version); resp->implementationVersion = nv; } if (binitres->errcode) { yaz_log(LOG_LOG, "Connection rejected by backend."); *resp->result = 0; assoc->state = ASSOC_DEAD; } else assoc->state = ASSOC_UP; return apdu; } /* * These functions should be merged. */ static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo, ODR odr) { #if ASN_COMPILED dr->which = Z_DefaultDiagFormat_v2Addinfo; dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : ""); #else dr->which = Z_DiagForm_v2AddInfo; dr->addinfo = odr_strdup (odr, addinfo ? addinfo : ""); #endif } /* * nonsurrogate diagnostic record. */ static Z_Records *diagrec(association *assoc, int error, char *addinfo) { int oid[OID_SIZE]; Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec)); oident bib1; int *err = odr_intdup(assoc->encode, error); Z_DiagRec *drec = (Z_DiagRec *) odr_malloc (assoc->encode, sizeof(*drec)); Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *) odr_malloc (assoc->encode, sizeof(*dr)); bib1.proto = assoc->proto; bib1.oclass = CLASS_DIAGSET; bib1.value = VAL_BIB1; yaz_log(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo : "NULL"); rec->which = Z_Records_NSD; #if ASN_COMPILED rec->u.nonSurrogateDiagnostic = dr; #else rec->u.nonSurrogateDiagnostic = drec; drec->which = Z_DiagRec_defaultFormat; drec->u.defaultFormat = dr; #endif dr->diagnosticSetId = odr_oiddup (assoc->encode, oid_ent_to_oid(&bib1, oid)); dr->condition = err; set_addinfo (dr, addinfo, assoc->encode); return rec; } /* * surrogate diagnostic. */ static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname, int error, char *addinfo) { int oid[OID_SIZE]; Z_NamePlusRecord *rec = (Z_NamePlusRecord *) odr_malloc (assoc->encode, sizeof(*rec)); int *err = odr_intdup(assoc->encode, error); oident bib1; Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec)); Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *) odr_malloc (assoc->encode, sizeof(*dr)); bib1.proto = assoc->proto; bib1.oclass = CLASS_DIAGSET; bib1.value = VAL_BIB1; yaz_log(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo); rec->databaseName = dbname; rec->which = Z_NamePlusRecord_surrogateDiagnostic; rec->u.surrogateDiagnostic = drec; drec->which = Z_DiagRec_defaultFormat; drec->u.defaultFormat = dr; dr->diagnosticSetId = odr_oiddup (assoc->encode, oid_ent_to_oid(&bib1, oid)); dr->condition = err; set_addinfo (dr, addinfo, assoc->encode); return rec; } /* * multiple nonsurrogate diagnostics. */ static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo) { int oid[OID_SIZE]; Z_DiagRecs *recs = (Z_DiagRecs *)odr_malloc (assoc->encode, sizeof(*recs)); int *err = odr_intdup(assoc->encode, error); oident bib1; Z_DiagRec **recp = (Z_DiagRec **)odr_malloc (assoc->encode, sizeof(*recp)); Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec)); Z_DefaultDiagFormat *rec = (Z_DefaultDiagFormat *)odr_malloc (assoc->encode, sizeof(*rec)); yaz_log(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : ""); bib1.proto = assoc->proto; bib1.oclass = CLASS_DIAGSET; bib1.value = VAL_BIB1; recs->num_diagRecs = 1; recs->diagRecs = recp; recp[0] = drec; drec->which = Z_DiagRec_defaultFormat; drec->u.defaultFormat = rec; rec->diagnosticSetId = odr_oiddup (assoc->encode, oid_ent_to_oid(&bib1, oid)); rec->condition = err; #ifdef ASN_COMPILED rec->which = Z_DefaultDiagFormat_v2Addinfo; rec->u.v2Addinfo = odr_strdup (assoc->encode, addinfo ? addinfo : ""); #else rec->which = Z_DiagForm_v2AddInfo; rec->addinfo = odr_strdup (assoc->encode, addinfo ? addinfo : ""); #endif return recs; } static Z_Records *pack_records(association *a, char *setname, int start, int *num, Z_RecordComposition *comp, int *next, int *pres, oid_value format, Z_ReferenceId *referenceId, int *oid) { int recno, total_length = 0, toget = *num, dumped_records = 0; Z_Records *records = (Z_Records *) odr_malloc (a->encode, sizeof(*records)); Z_NamePlusRecordList *reclist = (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist)); Z_NamePlusRecord **list = (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget); records->which = Z_Records_DBOSD; records->u.databaseOrSurDiagnostics = reclist; reclist->num_records = 0; reclist->records = list; *pres = Z_PRES_SUCCESS; *num = 0; *next = 0; yaz_log(LOG_LOG, "Request to pack %d+%d", start, toget); yaz_log(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize, a->maximumRecordSize); for (recno = start; reclist->num_records < toget; recno++) { bend_fetch_rr freq; Z_NamePlusRecord *thisrec; int this_length = 0; /* * we get the number of bytes allocated on the stream before any * allocation done by the backend - this should give us a reasonable * idea of the total size of the data so far. */ total_length = odr_total(a->encode) - dumped_records; freq.errcode = 0; freq.errstring = 0; freq.basename = 0; freq.len = 0; freq.record = 0; freq.last_in_set = 0; freq.setname = setname; freq.surrogate_flag = 0; freq.number = recno; freq.comp = comp; freq.request_format = format; freq.request_format_raw = oid; freq.output_format = format; freq.output_format_raw = 0; freq.stream = a->encode; freq.print = a->print; freq.surrogate_flag = 0; freq.referenceId = referenceId; (*a->init->bend_fetch)(a->backend, &freq); /* backend should be able to signal whether error is system-wide or only pertaining to current record */ if (freq.errcode) { if (!freq.surrogate_flag) { *pres = Z_PRES_FAILURE; return diagrec(a, freq.errcode, freq.errstring); } reclist->records[reclist->num_records] = surrogatediagrec(a, freq.basename, freq.errcode, freq.errstring); reclist->num_records++; *next = freq.last_in_set ? 0 : recno + 1; continue; } if (freq.len >= 0) this_length = freq.len; else this_length = odr_total(a->encode) - total_length; yaz_log(LOG_DEBUG, " fetched record, len=%d, total=%d", this_length, total_length); if (this_length + total_length > a->preferredMessageSize) { /* record is small enough, really */ if (this_length <= a->preferredMessageSize) { yaz_log(LOG_DEBUG, " Dropped last normal-sized record"); *pres = Z_PRES_PARTIAL_2; break; } /* record can only be fetched by itself */ if (this_length < a->maximumRecordSize) { yaz_log(LOG_DEBUG, " Record > prefmsgsz"); if (toget > 1) { yaz_log(LOG_DEBUG, " Dropped it"); reclist->records[reclist->num_records] = surrogatediagrec(a, freq.basename, 16, 0); reclist->num_records++; *next = freq.last_in_set ? 0 : recno + 1; dumped_records += this_length; continue; } } else /* too big entirely */ { yaz_log(LOG_DEBUG, "Record > maxrcdsz"); reclist->records[reclist->num_records] = surrogatediagrec(a, freq.basename, 17, 0); reclist->num_records++; *next = freq.last_in_set ? 0 : recno + 1; dumped_records += this_length; continue; } } if (!(thisrec = (Z_NamePlusRecord *) odr_malloc(a->encode, sizeof(*thisrec)))) return 0; if (!(thisrec->databaseName = (char *)odr_malloc(a->encode, strlen(freq.basename) + 1))) return 0; strcpy(thisrec->databaseName, freq.basename); thisrec->which = Z_NamePlusRecord_databaseRecord; if (freq.output_format_raw) { struct oident *ident = oid_getentbyoid(freq.output_format_raw); freq.output_format = ident->value; } thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format, freq.record, freq.len); if (!thisrec->u.databaseRecord) return 0; reclist->records[reclist->num_records] = thisrec; reclist->num_records++; *next = freq.last_in_set ? 0 : recno + 1; } *num = reclist->num_records; return records; } static Z_APDU *process_searchRequest(association *assoc, request *reqb, int *fd) { Z_SearchRequest *req = reqb->request->u.searchRequest; bend_search_rr *bsrr = (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr)); yaz_log(LOG_LOG, "Got SearchRequest."); bsrr->fd = fd; bsrr->request = reqb; bsrr->association = assoc; bsrr->referenceId = req->referenceId; save_referenceId (reqb, bsrr->referenceId); yaz_log (LOG_LOG, "ResultSet '%s'", req->resultSetName); if (req->databaseNames) { int i; for (i = 0; i < req->num_databaseNames; i++) yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]); } switch (req->query->which) { case Z_Query_type_1: case Z_Query_type_101: log_rpn_query (req->query->u.type_1); } if (assoc->init->bend_search) { bsrr->setname = req->resultSetName; bsrr->replace_set = *req->replaceIndicator; bsrr->num_bases = req->num_databaseNames; bsrr->basenames = req->databaseNames; bsrr->query = req->query; bsrr->stream = assoc->encode; bsrr->decode = assoc->decode; bsrr->print = assoc->print; bsrr->errcode = 0; bsrr->hits = 0; bsrr->errstring = NULL; (assoc->init->bend_search)(assoc->backend, bsrr); if (!bsrr->request) return 0; } #if 0 else { bend_searchrequest bsrq; bend_searchresult *bsrt; bsrq.setname = req->resultSetName; bsrq.replace_set = *req->replaceIndicator; bsrq.num_bases = req->num_databaseNames; bsrq.basenames = req->databaseNames; bsrq.query = req->query; bsrq.referenceId = req->referenceId; bsrq.stream = assoc->encode; bsrq.decode = assoc->decode; bsrq.print = assoc->print; if (!(bsrt = bend_search (assoc->backend, &bsrq, fd))) return 0; bsrr->hits = bsrt->hits; bsrr->errcode = bsrt->errcode; bsrr->errstring = bsrt->errstring; } #endif return response_searchRequest(assoc, reqb, bsrr, fd); } int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;} /* * Prepare a searchresponse based on the backend results. We probably want * to look at making the fetching of records nonblocking as well, but * so far, we'll keep things simple. * If bsrt is null, that means we're called in response to a communications * event, and we'll have to get the response for ourselves. */ static Z_APDU *response_searchRequest(association *assoc, request *reqb, bend_search_rr *bsrt, int *fd) { Z_SearchRequest *req = reqb->request->u.searchRequest; Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu)); Z_SearchResponse *resp = (Z_SearchResponse *) odr_malloc (assoc->encode, sizeof(*resp)); int *nulint = odr_intdup (assoc->encode, 0); bool_t *sr = odr_intdup(assoc->encode, 1); int *next = odr_intdup(assoc->encode, 0); int *none = odr_intdup(assoc->encode, Z_RES_NONE); apdu->which = Z_APDU_searchResponse; apdu->u.searchResponse = resp; resp->referenceId = req->referenceId; resp->additionalSearchInfo = 0; resp->otherInfo = 0; *fd = -1; if (!bsrt && !bend_searchresponse(assoc->backend, bsrt)) { yaz_log(LOG_FATAL, "Bad result from backend"); return 0; } else if (bsrt->errcode) { resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring); resp->resultCount = nulint; resp->numberOfRecordsReturned = nulint; resp->nextResultSetPosition = nulint; resp->searchStatus = nulint; resp->resultSetStatus = none; resp->presentStatus = 0; } else { int *toget = odr_intdup(assoc->encode, 0); int *presst = odr_intdup(assoc->encode, 0); Z_RecordComposition comp, *compp = 0; resp->records = 0; resp->resultCount = &bsrt->hits; comp.which = Z_RecordComp_simple; /* how many records does the user agent want, then? */ if (bsrt->hits <= *req->smallSetUpperBound) { *toget = bsrt->hits; if ((comp.u.simple = req->smallSetElementSetNames)) compp = ∁ } else if (bsrt->hits < *req->largeSetLowerBound) { *toget = *req->mediumSetPresentNumber; if (*toget > bsrt->hits) *toget = bsrt->hits; if ((comp.u.simple = req->mediumSetElementSetNames)) compp = ∁ } else *toget = 0; if (*toget && !resp->records) { oident *prefformat; oid_value form; if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax))) form = VAL_NONE; else form = prefformat->value; resp->records = pack_records(assoc, req->resultSetName, 1, toget, compp, next, presst, form, req->referenceId, req->preferredRecordSyntax); if (!resp->records) return 0; resp->numberOfRecordsReturned = toget; resp->nextResultSetPosition = next; resp->searchStatus = sr; resp->resultSetStatus = 0; resp->presentStatus = presst; } else { if (*resp->resultCount) *next = 1; resp->numberOfRecordsReturned = nulint; resp->nextResultSetPosition = next; resp->searchStatus = sr; resp->resultSetStatus = 0; resp->presentStatus = 0; } } return apdu; } /* * Maybe we got a little over-friendly when we designed bend_fetch to * get only one record at a time. Some backends can optimise multiple-record * fetches, and at any rate, there is some overhead involved in * all that selecting and hopping around. Problem is, of course, that the * frontend can't know ahead of time how many records it'll need to * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR * is downright lousy as a bulk data transfer protocol. * * To start with, we'll do the fetching of records from the backend * in one operation: To save some trips in and out of the event-handler, * and to simplify the interface to pack_records. At any rate, asynch * operation is more fun in operations that have an unpredictable execution * speed - which is normally more true for search than for present. */ static Z_APDU *process_presentRequest(association *assoc, request *reqb, int *fd) { Z_PresentRequest *req = reqb->request->u.presentRequest; oident *prefformat; oid_value form; Z_APDU *apdu; Z_PresentResponse *resp; int *next; int *num; yaz_log(LOG_LOG, "Got PresentRequest."); if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax))) form = VAL_NONE; else form = prefformat->value; resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp)); resp->records = 0; resp->presentStatus = odr_intdup(assoc->encode, 0); if (assoc->init->bend_present) { bend_present_rr *bprr = (bend_present_rr *) nmem_malloc (reqb->request_mem, sizeof(*bprr)); bprr->setname = req->resultSetId; bprr->start = *req->resultSetStartPoint; bprr->number = *req->numberOfRecordsRequested; bprr->format = form; bprr->comp = req->recordComposition; bprr->referenceId = req->referenceId; bprr->stream = assoc->encode; bprr->print = assoc->print; bprr->request = reqb; bprr->association = assoc; bprr->errcode = 0; bprr->errstring = NULL; (*assoc->init->bend_present)(assoc->backend, bprr); if (!bprr->request) return 0; if (bprr->errcode) { resp->records = diagrec(assoc, bprr->errcode, bprr->errstring); *resp->presentStatus = Z_PRES_FAILURE; } } apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu)); next = odr_intdup(assoc->encode, 0); num = odr_intdup(assoc->encode, 0); apdu->which = Z_APDU_presentResponse; apdu->u.presentResponse = resp; resp->referenceId = req->referenceId; resp->otherInfo = 0; if (!resp->records) { *num = *req->numberOfRecordsRequested; resp->records = pack_records(assoc, req->resultSetId, *req->resultSetStartPoint, num, req->recordComposition, next, resp->presentStatus, form, req->referenceId, req->preferredRecordSyntax); } if (!resp->records) return 0; resp->numberOfRecordsReturned = num; resp->nextResultSetPosition = next; return apdu; } /* * Scan was implemented rather in a hurry, and with support for only the basic * elements of the service in the backend API. Suggestions are welcome. */ static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd) { Z_ScanRequest *req = reqb->request->u.scanRequest; Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu)); Z_ScanResponse *res = (Z_ScanResponse *) odr_malloc (assoc->encode, sizeof(*res)); int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure); int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0); Z_ListEntries *ents = (Z_ListEntries *) odr_malloc (assoc->encode, sizeof(*ents)); Z_DiagRecs *diagrecs_p = NULL; oident *attent; oident *attset; yaz_log(LOG_LOG, "Got ScanRequest"); apdu->which = Z_APDU_scanResponse; apdu->u.scanResponse = res; res->referenceId = req->referenceId; res->stepSize = odr_intdup(assoc->encode, 0); if (req->stepSize) *res->stepSize = *req->stepSize; res->scanStatus = scanStatus; res->numberOfEntriesReturned = numberOfEntriesReturned; res->positionOfTerm = 0; res->entries = ents; ents->num_entries = 0; ents->entries = NULL; ents->num_nonsurrogateDiagnostics = 0; ents->nonsurrogateDiagnostics = NULL; res->attributeSet = 0; res->otherInfo = 0; if (req->attributeSet && (!(attent = oid_getentbyoid(req->attributeSet)) || attent->oclass != CLASS_ATTSET || attent->value != VAL_BIB1)) diagrecs_p = diagrecs(assoc, 121, 0); else if (req->stepSize && *req->stepSize > 0) diagrecs_p = diagrecs(assoc, 205, 0); else { bend_scan_rr *bsrr = (bend_scan_rr *) odr_malloc (assoc->encode, sizeof(*bsrr)); if (req->databaseNames) { int i; for (i = 0; i < req->num_databaseNames; i++) yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]); } bsrr->num_bases = req->num_databaseNames; bsrr->basenames = req->databaseNames; bsrr->num_entries = *req->numberOfTermsRequested; bsrr->term = req->termListAndStartPoint; bsrr->referenceId = req->referenceId; bsrr->stream = assoc->encode; bsrr->print = assoc->print; bsrr->step_size = res->stepSize; if (!(attset = oid_getentbyoid(req->attributeSet)) || attset->oclass != CLASS_RECSYN) bsrr->attributeset = VAL_NONE; else bsrr->attributeset = attset->value; log_scan_term (req->termListAndStartPoint, bsrr->attributeset); bsrr->term_position = req->preferredPositionInResponse ? *req->preferredPositionInResponse : 1; ((int (*)(void *, bend_scan_rr *)) (*assoc->init->bend_scan))(assoc->backend, bsrr); if (bsrr->errcode) diagrecs_p = diagrecs(assoc, bsrr->errcode, bsrr->errstring); else { int i; Z_Entry **tab = (Z_Entry **) odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries); if (bsrr->status == BEND_SCAN_PARTIAL) *scanStatus = Z_Scan_partial_5; else *scanStatus = Z_Scan_success; ents->entries = tab; ents->num_entries = bsrr->num_entries; res->numberOfEntriesReturned = &ents->num_entries; res->positionOfTerm = &bsrr->term_position; for (i = 0; i < bsrr->num_entries; i++) { Z_Entry *e; Z_TermInfo *t; Odr_oct *o; tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e)); if (bsrr->entries[i].occurrences >= 0) { e->which = Z_Entry_termInfo; e->u.termInfo = t = (Z_TermInfo *) odr_malloc(assoc->encode, sizeof(*t)); t->suggestedAttributes = 0; t->displayTerm = 0; t->alternativeTerm = 0; t->byAttributes = 0; t->otherTermInfo = 0; t->globalOccurrences = &bsrr->entries[i].occurrences; t->term = (Z_Term *) odr_malloc(assoc->encode, sizeof(*t->term)); t->term->which = Z_Term_general; t->term->u.general = o = (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct)); o->buf = (unsigned char *) odr_malloc(assoc->encode, o->len = o->size = strlen(bsrr->entries[i].term)); memcpy(o->buf, bsrr->entries[i].term, o->len); yaz_log(LOG_DEBUG, " term #%d: '%s' (%d)", i, bsrr->entries[i].term, bsrr->entries[i].occurrences); } else { Z_DiagRecs *drecs = diagrecs (assoc, bsrr->entries[i].errcode, bsrr->entries[i].errstring); assert (drecs->num_diagRecs == 1); e->which = Z_Entry_surrogateDiagnostic; assert (drecs->diagRecs[0]); e->u.surrogateDiagnostic = drecs->diagRecs[0]; } } } } if (diagrecs_p) { ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs; ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs; } return apdu; } static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd) { Z_SortRequest *req = reqb->request->u.sortRequest; Z_SortResponse *res = (Z_SortResponse *) odr_malloc (assoc->encode, sizeof(*res)); bend_sort_rr *bsrr = (bend_sort_rr *) odr_malloc (assoc->encode, sizeof(*bsrr)); Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu)); yaz_log(LOG_LOG, "Got SortRequest."); #ifdef ASN_COMPILED bsrr->num_input_setnames = req->num_inputResultSetNames; bsrr->input_setnames = req->inputResultSetNames; #else bsrr->num_input_setnames = req->inputResultSetNames->num_strings; bsrr->input_setnames = req->inputResultSetNames->strings; #endif bsrr->referenceId = req->referenceId; bsrr->output_setname = req->sortedResultSetName; bsrr->sort_sequence = req->sortSequence; bsrr->stream = assoc->encode; bsrr->print = assoc->print; bsrr->sort_status = Z_SortStatus_failure; bsrr->errcode = 0; bsrr->errstring = 0; (*assoc->init->bend_sort)(assoc->backend, bsrr); res->referenceId = bsrr->referenceId; res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status); res->resultSetStatus = 0; if (bsrr->errcode) { Z_DiagRecs *dr = diagrecs (assoc, bsrr->errcode, bsrr->errstring); #ifdef ASN_COMPILED res->diagnostics = dr->diagRecs; res->num_diagnostics = dr->num_diagRecs; #else res->diagnostics = dr; #endif } else { #ifdef ASN_COMPILED res->num_diagnostics = 0; #endif res->diagnostics = 0; } res->otherInfo = 0; apdu->which = Z_APDU_sortResponse; apdu->u.sortResponse = res; return apdu; } static Z_APDU *process_deleteRequest(association *assoc, request *reqb, int *fd) { Z_DeleteResultSetRequest *req = reqb->request->u.deleteResultSetRequest; Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *) odr_malloc (assoc->encode, sizeof(*res)); bend_delete_rr *bdrr = (bend_delete_rr *) odr_malloc (assoc->encode, sizeof(*bdrr)); Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu)); yaz_log(LOG_LOG, "Got DeleteRequest."); bdrr->num_setnames = req->num_resultSetList; bdrr->setnames = req->resultSetList; bdrr->stream = assoc->encode; bdrr->print = assoc->print; bdrr->function = *req->deleteFunction; bdrr->referenceId = req->referenceId; bdrr->statuses = 0; if (bdrr->num_setnames > 0) { int i; bdrr->statuses = (int*) odr_malloc(assoc->encode, sizeof(*bdrr->statuses) * bdrr->num_setnames); for (i = 0; i < bdrr->num_setnames; i++) bdrr->statuses[i] = 0; } (*assoc->init->bend_delete)(assoc->backend, bdrr); res->referenceId = req->referenceId; res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status); res->deleteListStatuses = 0; if (bdrr->num_setnames > 0) { int i; res->deleteListStatuses = (Z_ListStatuses *) odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses)); res->deleteListStatuses->num = bdrr->num_setnames; res->deleteListStatuses->elements = (Z_ListStatus **) odr_malloc (assoc->encode, sizeof(*res->deleteListStatuses->elements) * bdrr->num_setnames); for (i = 0; inum_setnames; i++) { res->deleteListStatuses->elements[i] = (Z_ListStatus *) odr_malloc (assoc->encode, sizeof(**res->deleteListStatuses->elements)); res->deleteListStatuses->elements[i]->status = bdrr->statuses+i; res->deleteListStatuses->elements[i]->id = odr_strdup (assoc->encode, bdrr->setnames[i]); } } res->numberNotDeleted = 0; res->bulkStatuses = 0; res->deleteMessage = 0; res->otherInfo = 0; apdu->which = Z_APDU_deleteResultSetResponse; apdu->u.deleteResultSetResponse = res; return apdu; } static void process_close(association *assoc, request *reqb) { Z_Close *req = reqb->request->u.close; static char *reasons[] = { "finished", "shutdown", "systemProblem", "costLimit", "resources", "securityViolation", "protocolError", "lackOfActivity", "peerAbort", "unspecified" }; yaz_log(LOG_LOG, "Got Close, reason %s, message %s", reasons[*req->closeReason], req->diagnosticInformation ? req->diagnosticInformation : "NULL"); if (assoc->version < 3) /* to make do_force respond with close */ assoc->version = 3; do_close_req(assoc, Z_Close_finished, "Association terminated by client", reqb); } void save_referenceId (request *reqb, Z_ReferenceId *refid) { if (refid) { reqb->len_refid = refid->len; reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len); memcpy (reqb->refid, refid->buf, refid->len); } else { reqb->len_refid = 0; reqb->refid = NULL; } } void bend_request_send (bend_association a, bend_request req, Z_APDU *res) { process_response (a, req, res); } bend_request bend_request_mk (bend_association a) { request *nreq = request_get (&a->outgoing); nreq->request_mem = nmem_create (); return nreq; } Z_ReferenceId *bend_request_getid (ODR odr, bend_request req) { Z_ReferenceId *id; if (!req->refid) return 0; id = (Odr_oct *)odr_malloc (odr, sizeof(*odr)); id->buf = (unsigned char *)odr_malloc (odr, req->len_refid); id->len = id->size = req->len_refid; memcpy (id->buf, req->refid, req->len_refid); return id; } void bend_request_destroy (bend_request *req) { nmem_destroy((*req)->request_mem); request_release(*req); *req = NULL; } int bend_backend_respond (bend_association a, bend_request req) { char *msg; int r; r = process_request (a, req, &msg); if (r < 0) logf (LOG_WARN, "%s", msg); return r; } void bend_request_setdata(bend_request r, void *p) { r->clientData = p; } void *bend_request_getdata(bend_request r) { return r->clientData; } static Z_APDU *process_segmentRequest (association *assoc, request *reqb) { bend_segment_rr request; request.segment = reqb->request->u.segmentRequest; request.stream = assoc->encode; request.decode = assoc->decode; request.print = assoc->print; request.association = assoc; (*assoc->init->bend_segment)(assoc->backend, &request); return 0; } static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd) { bend_esrequest_rr esrequest; Z_ExtendedServicesRequest *req = reqb->request->u.extendedServicesRequest; Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse); Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse; yaz_log(LOG_DEBUG,"inside Process esRequest"); esrequest.esr = reqb->request->u.extendedServicesRequest; esrequest.stream = assoc->encode; esrequest.decode = assoc->decode; esrequest.print = assoc->print; esrequest.errcode = 0; esrequest.errstring = NULL; esrequest.request = reqb; esrequest.association = assoc; esrequest.taskPackage = 0; esrequest.referenceId = req->referenceId; (*assoc->init->bend_esrequest)(assoc->backend, &esrequest); /* If the response is being delayed, return NULL */ if (esrequest.request == NULL) return(NULL); resp->referenceId = req->referenceId; if (esrequest.errcode == -1) { /* Backend service indicates request will be processed */ yaz_log(LOG_DEBUG,"Request could be processed...Accepted !"); *resp->operationStatus = Z_ExtendedServicesResponse_accepted; } else if (esrequest.errcode == 0) { /* Backend service indicates request will be processed */ yaz_log(LOG_DEBUG,"Request could be processed...Done !"); *resp->operationStatus = Z_ExtendedServicesResponse_done; } else { Z_DiagRecs *diagRecs = diagrecs (assoc, esrequest.errcode, esrequest.errstring); /* Backend indicates error, request will not be processed */ yaz_log(LOG_DEBUG,"Request could not be processed...failure !"); *resp->operationStatus = Z_ExtendedServicesResponse_failure; resp->num_diagnostics = diagRecs->num_diagRecs; resp->diagnostics = diagRecs->diagRecs; } /* Do something with the members of bend_extendedservice */ if (esrequest.taskPackage) resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED, (const char *) esrequest.taskPackage, -1); yaz_log(LOG_DEBUG,"Send the result apdu"); return apdu; }