X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=server%2Fseshigh.c;h=44d69f7a8d6be75974a16c948bfda649dd8092c9;hp=1021c88b3ce6aa00f51eee3a41ab26e965aa17c4;hb=f69d4aa4609ff3daa71733da1ea0fcd8322ab954;hpb=ab6840e96ece6494bbcc06e1c52f0deb371bcf53 diff --git a/server/seshigh.c b/server/seshigh.c index 1021c88..44d69f7 100644 --- a/server/seshigh.c +++ b/server/seshigh.c @@ -1,10 +1,226 @@ /* - * Copyright (C) 1994, Index Data I/S - * All rights reserved. + * Copyright (c) 1995-1998, Index Data + * See the file LICENSE for details. * Sebastian Hammer, Adam Dickmeiss * * $Log: seshigh.c,v $ - * Revision 1.11 1995-03-28 09:16:21 quinn + * 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 @@ -40,508 +256,1529 @@ * */ +/* + * 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 +#include +#ifdef WINDOWS +#include +#else +#include +#endif #include +#include #include -#include -#include +#include "eventl.h" +#include "session.h" #include #include +#include +#include #include -#include +static int process_request(association *assoc, request *req); +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); -#define ENCODE_BUFFER_SIZE 10000 +static FILE *apduf = 0; /* for use in static mode */ +static statserv_options_block *control_block = 0; -static int process_apdu(IOCHAN chan); -static int process_initRequest(IOCHAN client, Z_InitRequest *req); -static int process_searchRequest(IOCHAN client, Z_SearchRequest *req); -static int process_presentRequest(IOCHAN client, Z_PresentRequest *req); +/* 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 *new; + association *anew; - if (!(new = malloc(sizeof(*new)))) + if (!control_block) + control_block = statserv_getcontrol(); + if (!(anew = (association *)xmalloc(sizeof(*anew)))) return 0; - new->client_chan = channel; - new->client_link = link; - if (!(new->decode = odr_createmem(ODR_DECODE)) || - !(new->encode = odr_createmem(ODR_ENCODE))) + anew->client_chan = channel; + anew->client_link = link; + if (!(anew->decode = odr_createmem(ODR_DECODE)) || + !(anew->encode = odr_createmem(ODR_ENCODE))) return 0; - if (!(new->encode_buffer = malloc(ENCODE_BUFFER_SIZE))) - return 0; - odr_setbuf(new->encode, new->encode_buffer, ENCODE_BUFFER_SIZE); - new->state = ASSOC_UNINIT; - new->input_buffer = 0; - new->input_buffer_len = 0; - if (cs_getproto(link) == CS_Z3950) - new->proto = PROTO_Z3950; + 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"))) + { + logf(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"))) + { + logf(LOG_WARN|LOG_ERRNO, "%s", filename); + return 0; + } + setvbuf(f, 0, _IONBF, 0); + } + odr_setprint(anew->print, f); + } + } else - new->proto = PROTO_SR; - return new; + 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) { odr_destroy(h->decode); odr_destroy(h->encode); - free(h->encode_buffer); + if (h->print) + odr_destroy(h->print); if (h->input_buffer) - free(h->input_buffer); - free(h); + xfree(h->input_buffer); + if (h->backend) + bend_close(h->backend); + while (request_deq(&h->incoming)); + while (request_deq(&h->outgoing)); + request_delq(&h->incoming); + request_delq(&h->outgoing); + xfree(h); +} + +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) + { + logf(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 + { + logf(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 = iochan_getdata(h); + association *assoc = (association *)iochan_getdata(h); COMSTACK conn = assoc->client_link; + request *req; - if (event == EVENT_INPUT) + assert(h && conn && assoc); + if (event == EVENT_TIMEOUT) + { + if (assoc->state != ASSOC_UP) + { + logf(LOG_LOG, "Final timeout - closing connection."); + cs_close(conn); + destroy_association(assoc); + iochan_destroy(h); + } + else + { + logf(LOG_LOG, "Session idle too long. Sending close."); + do_close(assoc, Z_Close_lackOfActivity, 0); + } + return; + } + if (event & EVENT_INPUT || event & EVENT_WORK) /* input */ { - assert(assoc && conn); - res = cs_get(conn, &assoc->input_buffer, &assoc->input_buffer_len); - switch (res) + if (event & EVENT_INPUT) { - case 0: case -1: /* connection closed by peer */ - fprintf(stderr, "Closed connection\n"); + logf(LOG_DEBUG, "ir_session (input)"); + assert(assoc && conn); + /* We aren't speaking to this fellow */ + if (assoc->state == ASSOC_DEAD) + { + logf(LOG_LOG, "Closed connection after reject"); cs_close(conn); destroy_association(assoc); iochan_destroy(h); return; - case 1: /* incomplete read */ + } + if ((res = cs_get(conn, &assoc->input_buffer, + &assoc->input_buffer_len)) <= 0) + { + logf(LOG_LOG, "Connection closed by client"); + cs_close(conn); + destroy_association(assoc); + iochan_destroy(h); return; - default: /* data! */ - assoc->input_apdu_len = res; - if (process_apdu(h) < 0) - { - fprintf(stderr, "Operation failed\n"); - cs_close(conn); - destroy_association(assoc); - iochan_destroy(h); - } - else if (cs_more(conn)) /* arrange to be called again */ - iochan_setevent(h, EVENT_INPUT); + } + else if (res == 1) /* incomplete read - wait for more */ + 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 */ + logf(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)) + { + logf(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ", + odr_errmsg(odr_geterror(assoc->decode)), + odr_offset(assoc->decode)); + logf(LOG_LOG, "PDU dump:"); + odr_dumpBER(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)) + { + logf(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) + { + request_deq(&assoc->incoming); + if (process_request(assoc, req) < 0) + do_close_req(assoc, Z_Close_systemProblem, "Unknown error", + req); } } - else if (event == EVENT_OUTPUT) + if (event & EVENT_OUTPUT) { - switch (res = cs_put(conn, assoc->encode_buffer, assoc->encoded_len)) + request *req = request_head(&assoc->outgoing); + + logf(LOG_DEBUG, "ir_session (output)"); + req->state = REQUEST_PENDING; + switch (res = cs_put(conn, req->response, req->len_response)) { case -1: - fprintf(stderr, "Closed connection\n"); + logf(LOG_LOG, "Connection closed by client"); cs_close(conn); destroy_association(assoc); iochan_destroy(h); - case 0: /* all sent */ - iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset */ break; - case 1: /* partial send */ - break; /* we'll get called again */ + case 0: /* all sent - release the request structure */ + logf(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)) + iochan_clearflag(h, EVENT_OUTPUT); + break; + /* value of 1 -- partial send -- is simply ignored */ } } - else if (event == EVENT_EXCEPT) + if (event & EVENT_EXCEPT) { - fprintf(stderr, "Exception on line\n"); + logf(LOG_DEBUG, "ir_session (exception)"); cs_close(conn); destroy_association(assoc); iochan_destroy(h); } } -static int process_apdu(IOCHAN chan) +/* + * Initiate request processing. + */ +static int process_request(association *assoc, request *req) { - Z_APDU *apdu; - int res; - association *assoc = iochan_getdata(chan); + int fd = -1; + Z_APDU *res; + int retval; - odr_setbuf(assoc->decode, assoc->input_buffer, assoc->input_apdu_len); - if (!z_APDU(assoc->decode, &apdu, 0)) - { - odr_perror(assoc->decode, "Incoming APDU"); - return -1; - } - switch (apdu->which) + assert(req && req->state == REQUEST_IDLE); + switch (req->request->which) { case Z_APDU_initRequest: - res = process_initRequest(chan, apdu->u.initRequest); break; + res = process_initRequest(assoc, req); break; case Z_APDU_searchRequest: - res = process_searchRequest(chan, apdu->u.searchRequest); break; + res = process_searchRequest(assoc, req, &fd); break; case Z_APDU_presentRequest: - res = process_presentRequest(chan, apdu->u.presentRequest); break; + res = process_presentRequest(assoc, req, &fd); break; + case Z_APDU_scanRequest: + res = process_scanRequest(assoc, req, &fd); break; + case Z_APDU_extendedServicesRequest: + if (assoc->bend_esrequest) + res = process_ESRequest(assoc, req, &fd); + else + { + logf(LOG_WARN, "Cannot handle EXTENDED SERVICES APDU"); + return -1; + } + break; + case Z_APDU_sortRequest: + if (assoc->bend_sort) + res = process_sortRequest(assoc, req, &fd); + else + { + logf(LOG_WARN, "Cannot handle SORT APDU"); + return -1; + } + break; + case Z_APDU_close: + process_close(assoc, req); return 0; + case Z_APDU_deleteResultSetRequest: + if (assoc->bend_delete) + res = process_deleteRequest(assoc, req, &fd); + else + { + logf (LOG_WARN, "Cannot handle Delete APDU"); + return -1; + } + break; default: - fprintf(stderr, "Bad APDU\n"); + logf(LOG_WARN, "Bad APDU received"); return -1; } - odr_reset(assoc->decode); /* release incopming APDU */ - odr_reset(assoc->encode); /* release stuff alloced before encoding */ - return res; + if (res) + { + logf(LOG_DEBUG, " result immediately available"); + retval = process_response(assoc, req, res); + } + else if (fd < 0) + { + logf(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 */ + + logf(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; + + logf(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: + logf(LOG_WARN, "Serious programmer's lapse or bug"); + abort(); + } + if ((res && process_response(assoc, req, res) < 0) || fd < 0) + { + logf(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 */ + { + logf(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 (!z_APDU(assoc->encode, &res, 0)) + { + logf(LOG_WARN, "ODR error when encoding response: %s", + odr_errmsg(odr_geterror(assoc->decode))); + odr_reset(assoc->encode); + 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 */ + if (assoc->print && !z_APDU(assoc->print, &res, 0)) + { + logf(LOG_WARN, "ODR print error: %s", + odr_errmsg(odr_geterror(assoc->print))); + odr_reset(assoc->print); + } + 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); + /* Is there more work to be done? give that to the input handler too */ +#if 1 + if (request_head(&assoc->incoming)) + { + logf (LOG_DEBUG, "more work to be done"); + iochan_setevent(assoc->client_chan, EVENT_WORK); + } +#endif + return 0; } -static int process_initRequest(IOCHAN client, Z_InitRequest *req) +/* + * 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) { - Z_APDU apdu, *apdup; - Z_InitResponse resp; - bool_t result = 1; - association *assoc = iochan_getdata(client); + Z_InitRequest *req = reqb->request->u.initRequest; + Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse); + Z_InitResponse *resp = apdu->u.initResponse; bend_initrequest binitreq; bend_initresult *binitres; + char options[100]; - fprintf(stderr, "Got initRequest.\n"); + logf(LOG_LOG, "Got initRequest"); if (req->implementationId) - fprintf(stderr, "Id: %s\n", req->implementationId); + logf(LOG_LOG, "Id: %s", req->implementationId); if (req->implementationName) - fprintf(stderr, "Name: %s\n", req->implementationName); + logf(LOG_LOG, "Name: %s", req->implementationName); if (req->implementationVersion) - fprintf(stderr, "Version: %s\n", req->implementationVersion); + logf(LOG_LOG, "Version: %s", req->implementationVersion); + binitreq.stream = assoc->encode; binitreq.configname = "default-config"; - if (!(binitres = bend_init(&binitreq)) || binitres->errcode) + binitreq.auth = req->idAuthentication; + binitreq.bend_sort = NULL; + binitreq.bend_search = NULL; + binitreq.bend_present = NULL; + binitreq.bend_esrequest = NULL; + binitreq.bend_delete = NULL; + if (!(binitres = bend_init(&binitreq))) { - fprintf(stderr, "Bad response from backend\n"); - return -1; + logf(LOG_WARN, "Bad response from backend."); + return 0; } - apdup = &apdu; - apdu.which = Z_APDU_initResponse; - apdu.u.initResponse = &resp; - resp.referenceId = req->referenceId; - resp.options = req->options; /* should check these */ - resp.protocolVersion = req->protocolVersion; + assoc->backend = binitres->handle; + if ((assoc->bend_sort = (int (*)())binitreq.bend_sort)) + logf (LOG_DEBUG, "Sort handler installed"); + if ((assoc->bend_search = (int (*)())binitreq.bend_search)) + logf (LOG_DEBUG, "Search handler installed"); + if ((assoc->bend_present = (int (*)())binitreq.bend_present)) + logf (LOG_DEBUG, "Present handler installed"); + if ((assoc->bend_esrequest = (int (*)())binitreq.bend_esrequest)) + logf (LOG_DEBUG, "ESRequest handler installed"); + if ((assoc->bend_delete = (int (*)())binitreq.bend_delete)) + logf (LOG_DEBUG, "Delete 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) && binitreq.bend_delete) + { + ODR_MASK_SET(resp->options, Z_Options_delSet); + strcat(options, " del"); + } + if (ODR_MASK_GET(req->options, Z_Options_extendedServices) && + binitreq.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)) + { + 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) && binitreq.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; + } + logf(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options); assoc->maximumRecordSize = *req->maximumRecordSize; - /* - * This is not so hot. The big todo for ODR is dynamic memory allocation - * on encoding. - */ - if (assoc->maximumRecordSize > ENCODE_BUFFER_SIZE - 1000) - assoc->maximumRecordSize = ENCODE_BUFFER_SIZE - 1000; + if (assoc->maximumRecordSize > control_block->maxrecordsize) + assoc->maximumRecordSize = control_block->maxrecordsize; assoc->preferredMessageSize = *req->preferredMessageSize; if (assoc->preferredMessageSize > assoc->maximumRecordSize) assoc->preferredMessageSize = assoc->maximumRecordSize; - resp.preferredMessageSize = &assoc->preferredMessageSize; - resp.maximumRecordSize = &assoc->maximumRecordSize; - resp.result = &result; - resp.implementationId = "YAZ"; - resp.implementationName = "Index Data/YAZ Generic Frontend Server"; - resp.implementationVersion = "$Revision: 1.11 $"; - resp.userInformationField = 0; - if (!z_APDU(assoc->encode, &apdup, 0)) - { - odr_perror(assoc->encode, "Encode initres"); - return -1; + resp->preferredMessageSize = &assoc->preferredMessageSize; + resp->maximumRecordSize = &assoc->maximumRecordSize; + resp->implementationName = "Index Data/YAZ Generic Frontend Server"; + if (binitres->errcode) + { + logf(LOG_LOG, "Connection rejected by backend."); + *resp->result = 0; + assoc->state = ASSOC_DEAD; } - odr_getbuf(assoc->encode, &assoc->encoded_len); - odr_reset(assoc->encode); - iochan_setflags(client, EVENT_OUTPUT | EVENT_EXCEPT); - return 0; + else + assoc->state = ASSOC_UP; + return apdu; } -static Z_Records *diagrec(oid_proto proto, int error, char *addinfo) +/* + * These functions should be merged. + */ + +static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo) { - static Z_Records rec; +#if ASN_COMPILED + dr->which = Z_DefaultDiagFormat_v2Addinfo; + dr->u.v2Addinfo = addinfo ? addinfo : ""; +#else + dr->which = Z_DiagForm_v2AddInfo; + dr->addinfo = 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; - static Z_DiagRec dr; - static int err; + int *err = (int *) + odr_malloc (assoc->encode, sizeof(*err)); + Z_DiagRec *drec = (Z_DiagRec *) + odr_malloc (assoc->encode, sizeof(*drec)); + Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *) + odr_malloc (assoc->encode, sizeof(*dr)); - bib1.proto = proto; - bib1.class = CLASS_DIAGSET; + bib1.proto = assoc->proto; + bib1.oclass = CLASS_DIAGSET; bib1.value = VAL_BIB1; - fprintf(stderr, "Diagnostic: %d -- %s\n", error, addinfo ? addinfo : + logf(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo : "NULL"); - err = error; - rec.which = Z_Records_NSD; - rec.u.nonSurrogateDiagnostic = &dr; - dr.diagnosticSetId = oid_getoidbyent(&bib1); - dr.condition = &err; - dr.addinfo = addinfo ? addinfo : ""; - return &rec; + *err = error; + rec->which = Z_Records_NSD; +#if ASN_COMPILED + rec->u.nonSurrogateDiagnostic = dr; +#else +#ifdef Z_95 + rec->u.nonSurrogateDiagnostic = drec; + drec->which = Z_DiagRec_defaultFormat; + drec->u.defaultFormat = dr; +#else + rec->u.nonSurrogateDiagnostic = dr; +#endif +#endif + dr->diagnosticSetId = odr_oiddup (assoc->encode, + oid_ent_to_oid(&bib1, oid)); + dr->condition = err; + set_addinfo (dr, addinfo); + return rec; } -static Z_NamePlusRecord *surrogatediagrec(oid_proto proto, char *dbname, - int error, char *addinfo) +/* + * surrogate diagnostic. + */ +static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname, + int error, char *addinfo) { - static Z_NamePlusRecord rec; - static Z_DiagRec dr; - static int err; + int oid[OID_SIZE]; + Z_NamePlusRecord *rec = (Z_NamePlusRecord *)odr_malloc (assoc->encode, sizeof(*rec)); + int *err = (int *)odr_malloc (assoc->encode, sizeof(*err)); 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 = proto; - bib1.class = CLASS_DIAGSET; + bib1.proto = assoc->proto; + bib1.oclass = CLASS_DIAGSET; bib1.value = VAL_BIB1; - fprintf(stderr, "SurrogateDiagnotic: %d -- %s\n", error, addinfo); - err = error; - rec.databaseName = dbname; - rec.which = Z_NamePlusRecord_surrogateDiagnostic; - rec.u.surrogateDiagnostic = &dr; - dr.diagnosticSetId = oid_getoidbyent(&bib1); - dr.condition = &err; - dr.addinfo = addinfo ? addinfo : ""; - return &rec; + logf(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo); + *err = error; + 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); + + return rec; } -#define MAX_RECORDS 256 +/* + * 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 = (int *)odr_malloc (assoc->encode, sizeof(*err)); + 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)); + + logf(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo); + bib1.proto = assoc->proto; + bib1.oclass = CLASS_DIAGSET; + bib1.value = VAL_BIB1; + + *err = error; + 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 = addinfo ? addinfo : ""; +#else + rec->which = Z_DiagForm_v2AddInfo; + rec->addinfo = addinfo ? addinfo : ""; +#endif + return recs; +} static Z_Records *pack_records(association *a, char *setname, int start, - int *num, Z_ElementSetNames *esn, - int *next, int *pres) + int *num, Z_RecordComposition *comp, + int *next, int *pres, oid_value format) { - int recno, total_length = 0, toget = *num; - static Z_Records records; - static Z_NamePlusRecordList reclist; - static Z_NamePlusRecord *list[MAX_RECORDS]; + int oid[OID_SIZE]; + 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); oident recform; - Odr_oid *oid; - records.which = Z_Records_DBOSD; - records.u.databaseOrSurDiagnostics = &reclist; - reclist.num_records = 0; - reclist.records = list; + records->which = Z_Records_DBOSD; + records->u.databaseOrSurDiagnostics = reclist; + reclist->num_records = 0; + reclist->records = list; *pres = Z_PRES_SUCCESS; *num = 0; *next = 0; - recform.proto = a->proto; - recform.class = CLASS_RECSYN; - recform.value = VAL_USMARC; - if (!(oid = odr_oiddup(a->encode, oid_getoidbyent(&recform)))) - return 0; - - fprintf(stderr, "Request to pack %d+%d\n", start, toget); - fprintf(stderr, "pms=%d, mrs=%d\n", a->preferredMessageSize, + logf(LOG_DEBUG, "Request to pack %d+%d", start, toget); + logf(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize, a->maximumRecordSize); - for (recno = start; reclist.num_records < toget; recno++) + for (recno = start; reclist->num_records < toget; recno++) { bend_fetchrequest freq; bend_fetchresult *fres; Z_NamePlusRecord *thisrec; Z_DatabaseRecord *thisext; + int this_length = 0; - if (reclist.num_records == MAX_RECORDS - 1) - { - *pres = Z_PRES_PARTIAL_2; - break; - } + /* + * 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.setname = setname; freq.number = recno; - if (!(fres = bend_fetch(&freq))) + freq.comp = comp; + freq.format = format; + freq.stream = a->encode; + freq.surrogate_flag = 0; + if (!(fres = bend_fetch(a->backend, &freq, 0))) { *pres = Z_PRES_FAILURE; - return diagrec(a->proto, 2, "Backend interface problem"); + return diagrec(a, 2, "Backend interface problem"); } /* backend should be able to signal whether error is system-wide or only pertaining to current record */ if (fres->errcode) { - *pres = Z_PRES_FAILURE; - return diagrec(a->proto, fres->errcode, fres->errstring); + if (!freq.surrogate_flag) + { + *pres = Z_PRES_FAILURE; + return diagrec(a, fres->errcode, fres->errstring); + } + reclist->records[reclist->num_records] = + surrogatediagrec(a, fres->basename, fres->errcode, + fres->errstring); + reclist->num_records++; + *next = fres->last_in_set ? 0 : recno + 1; + continue; } - fprintf(stderr, " Got record, len=%d, total=%d\n", - fres->len, total_length); - if (fres->len + total_length > a->preferredMessageSize) + if (fres->len >= 0) + this_length = fres->len; + else + this_length = odr_total(a->encode) - total_length; + logf(LOG_DEBUG, " fetched record, len=%d, total=%d", + this_length, total_length); + if (this_length + total_length > a->preferredMessageSize) { - fprintf(stderr, " In drop-zone\n"); /* record is small enough, really */ - if (fres->len <= a->preferredMessageSize) + if (this_length <= a->preferredMessageSize) { - fprintf(stderr, " Dropped last normal-sized record\n"); + logf(LOG_DEBUG, " Dropped last normal-sized record"); *pres = Z_PRES_PARTIAL_2; break; } /* record can only be fetched by itself */ - if (fres->len < a->maximumRecordSize) + if (this_length < a->maximumRecordSize) { - fprintf(stderr, " Record > prefmsgsz\n"); + logf(LOG_DEBUG, " Record > prefmsgsz"); if (toget > 1) { - fprintf(stderr, " Dropped it\n"); - reclist.records[reclist.num_records] = - surrogatediagrec(a->proto, fres->basename, 16, 0); - reclist.num_records++; - *pres = Z_PRES_PARTIAL_2; - break; + logf(LOG_DEBUG, " Dropped it"); + reclist->records[reclist->num_records] = + surrogatediagrec(a, fres->basename, 16, 0); + reclist->num_records++; + *next = fres->last_in_set ? 0 : recno + 1; + dumped_records += this_length; + continue; } } else /* too big entirely */ { - fprintf(stderr, "Record > maxrcdsz\n"); - reclist.records[reclist.num_records] = - surrogatediagrec(a->proto, fres->basename, 17, 0); - reclist.num_records++; - *pres = Z_PRES_PARTIAL_2; - break; + logf(LOG_DEBUG, "Record > maxrcdsz"); + reclist->records[reclist->num_records] = + surrogatediagrec(a, fres->basename, 17, 0); + reclist->num_records++; + *next = fres->last_in_set ? 0 : recno + 1; + dumped_records += this_length; + continue; } } - if (!(thisrec = odr_malloc(a->encode, sizeof(*thisrec)))) + + if (!(thisrec = (Z_NamePlusRecord *)odr_malloc(a->encode, sizeof(*thisrec)))) return 0; - if (!(thisrec->databaseName = odr_malloc(a->encode, + if (!(thisrec->databaseName = (char *)odr_malloc(a->encode, strlen(fres->basename) + 1))) return 0; strcpy(thisrec->databaseName, fres->basename); thisrec->which = Z_NamePlusRecord_databaseRecord; - if (!(thisrec->u.databaseRecord = thisext = odr_malloc(a->encode, + if (!(thisrec->u.databaseRecord = thisext = (Z_External *)odr_malloc(a->encode, sizeof(Z_DatabaseRecord)))) return 0; - thisext->direct_reference = oid; /* should be OID for current MARC */ + recform.proto = a->proto; + recform.oclass = CLASS_RECSYN; + recform.value = fres->format; + thisext->direct_reference = odr_oiddup(a->encode, + oid_ent_to_oid(&recform, oid)); thisext->indirect_reference = 0; thisext->descriptor = 0; - thisext->which = ODR_EXTERNAL_octet; - if (!(thisext->u.octet_aligned = odr_malloc(a->encode, - sizeof(Odr_oct)))) - return 0; - if (!(thisext->u.octet_aligned->buf = odr_malloc(a->encode, fres->len))) - return 0; - memcpy(thisext->u.octet_aligned->buf, fres->record, fres->len); - thisext->u.octet_aligned->len = thisext->u.octet_aligned->size = - fres->len; - reclist.records[reclist.num_records] = thisrec; - reclist.num_records++; - total_length += fres->len; - (*num)++; + if (fres->len < 0) /* Structured data */ + { + switch (fres->format) + { + case VAL_SUTRS: thisext->which = Z_External_sutrs; break; + case VAL_GRS1: thisext->which = Z_External_grs1; break; + case VAL_EXPLAIN: thisext->which = Z_External_explainRecord; + break; + case VAL_SUMMARY: thisext->which = Z_External_summary; break; + case VAL_OPAC: thisext->which = Z_External_OPAC; break; + + default: + logf(LOG_FATAL, "Unknown structured format from backend."); + return 0; + } + + /* + * We cheat on the pointers here. Obviously, the record field + * of the backend-fetch structure should have been a union for + * correctness, but we're stuck with this for backwards + * compatibility. + */ + thisext->u.grs1 = (Z_GenericRecord*) fres->record; + } + else if (fres->format == VAL_SUTRS) /* SUTRS is a single-ASN.1-type */ + { +#if 0 + Z_SUTRS *sutrs = (Z_SUTRS *)odr_malloc(a->encode, 1+fres->len); + + memcpy(sutrs, fres->record, fres->len); + sutrs[fres->len] = '\0'; +#else + Odr_oct *sutrs = (Odr_oct *)odr_malloc(a->encode, sizeof(*sutrs)); + + thisext->which = Z_External_sutrs; + thisext->u.sutrs = sutrs; + sutrs->buf = (unsigned char *)odr_malloc(a->encode, fres->len); + sutrs->len = sutrs->size = fres->len; + memcpy(sutrs->buf, fres->record, fres->len); +#endif + } + else /* octet-aligned record. */ + { + thisext->which = Z_External_octet; + if (!(thisext->u.octet_aligned = (Odr_oct *)odr_malloc(a->encode, + sizeof(Odr_oct)))) + return 0; + if (!(thisext->u.octet_aligned->buf = (unsigned char *)odr_malloc(a->encode, + fres->len))) + return 0; + memcpy(thisext->u.octet_aligned->buf, fres->record, fres->len); + thisext->u.octet_aligned->len = thisext->u.octet_aligned->size = + fres->len; + } + reclist->records[reclist->num_records] = thisrec; + reclist->num_records++; *next = fres->last_in_set ? 0 : recno + 1; } - return &records; + *num = reclist->num_records; + return records; } -static int process_searchRequest(IOCHAN client, Z_SearchRequest *req) +static Z_APDU *process_searchRequest(association *assoc, request *reqb, + int *fd) { - Z_APDU apdu, *apdup; - Z_SearchResponse resp; - association *assoc = iochan_getdata(client); - int nulint = 0; - bool_t sr = 1; - bend_searchrequest bsrq; - bend_searchresult *bsrt; - oident *oent; - int next = 0; - - fprintf(stderr, "Got SearchRequest.\n"); - apdup = &apdu; - apdu.which = Z_APDU_searchResponse; - apdu.u.searchResponse = &resp; - resp.referenceId = req->referenceId; - - resp.records = 0; - if (req->query->which == Z_Query_type_1) - { - Z_RPNQuery *q = req->query->u.type_1; - - if (!(oent = oid_getentbyoid(q->attributeSetId)) || - oent->class != CLASS_ATTSET || - oent->value != VAL_BIB1) - resp.records = diagrec(assoc->proto, 121, 0); - } - if (!resp.records) - { - int toget; - Z_ElementSetNames *setnames; - int presst = 0; + Z_SearchRequest *req = reqb->request->u.searchRequest; + bend_search_rr *bsrr = (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr)); + + logf(LOG_LOG, "Got SearchRequest."); + save_referenceId (reqb, req->referenceId); + /* store ref id in request */ + bsrr->fd = fd; + bsrr->request = reqb; + bsrr->association = assoc; + if (assoc->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->errcode = 0; + bsrr->hits = 0; + bsrr->errstring = NULL; + ((int (*)(void *, bend_search_rr *))(assoc->bend_search))(assoc->backend, bsrr); + if (!bsrr->request) + return 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.stream = assoc->encode; + bsrq.decode = assoc->decode; + if (!(bsrt = bend_search(assoc->backend, &bsrq, fd))) + return 0; + bsrr->hits = bsrt->hits; + bsrr->errcode = bsrt->errcode; + bsrr->errstring = bsrt->errstring; + } + return response_searchRequest(assoc, reqb, bsrr, fd); +} - if (!(bsrt = bend_search(&bsrq))) - return -1; - else if (bsrt->errcode) - resp.records = diagrec(assoc->proto, bsrt->errcode, - bsrt->errstring); - else - resp.records = 0; +int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;} - resp.resultCount = &bsrt->hits; +/* + * 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 = (int *)odr_malloc (assoc->encode, sizeof(*nulint)); + bool_t *sr = (bool_t *)odr_malloc (assoc->encode, sizeof(*sr)); + int *next = (int *)odr_malloc (assoc->encode, sizeof(*next)); + int *none = (int *)odr_malloc (assoc->encode, sizeof(*none)); + + *nulint = 0; + *sr = 1; + *next = 0; + *none = 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)) + { + logf(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 = (int *)odr_malloc (assoc->encode, sizeof(*toget)); + int *presst = (int *)odr_malloc (assoc->encode, sizeof(*presst)); + Z_RecordComposition comp, *compp = 0; + *toget = 0; + *presst = 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; - setnames = req->smallSetElementSetNames; + *toget = bsrt->hits; + if ((comp.u.simple = req->smallSetElementSetNames)) + compp = ∁ } else if (bsrt->hits < *req->largeSetLowerBound) { - toget = *req->mediumSetPresentNumber; - setnames = req->mediumSetElementSetNames; + *toget = *req->mediumSetPresentNumber; + if (*toget > bsrt->hits) + *toget = bsrt->hits; + if ((comp.u.simple = req->mediumSetElementSetNames)) + compp = ∁ } else - toget = 0; + *toget = 0; + + if (*toget && !resp->records) + { + oident *prefformat; + oid_value form; - if (toget) + if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) || + prefformat->oclass != CLASS_RECSYN) + form = VAL_NONE; + else + form = prefformat->value; + resp->records = pack_records(assoc, req->resultSetName, 1, + toget, compp, next, presst, form); + if (!resp->records) + return 0; + resp->numberOfRecordsReturned = toget; + resp->nextResultSetPosition = next; + resp->searchStatus = sr; + resp->resultSetStatus = 0; + resp->presentStatus = presst; + } + else { - resp.records = pack_records(assoc, req->resultSetName, 1, &toget, - setnames, &next, &presst); - if (!resp.records) - return -1; - resp.numberOfRecordsReturned = &toget; - resp.nextResultSetPosition = &next; - resp.searchStatus = &sr; - resp.resultSetStatus = &sr; - resp.presentStatus = &presst; + 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 *presst; + int *next; + int *num; + + logf(LOG_LOG, "Got PresentRequest."); + + if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) || + prefformat->oclass != CLASS_RECSYN) + form = VAL_NONE; + else + form = prefformat->value; + if (assoc->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->stream = assoc->encode; + bprr->request = reqb; + bprr->association = assoc; + bprr->errcode = 0; + bprr->errstring = NULL; + ((int (*)(void *, bend_present_rr *))(*assoc->bend_present))(assoc->backend, bprr); + + if (!bprr->request) + return 0; + } + apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu)); + resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp)); + presst = (int *)odr_malloc (assoc->encode, sizeof(*presst)); + next = (int *)odr_malloc (assoc->encode, sizeof(*next)); + num = (int *)odr_malloc (assoc->encode, sizeof(*num)); + *presst = 0; + *next = 0; + *num = *req->numberOfRecordsRequested; + + apdu->which = Z_APDU_presentResponse; + apdu->u.presentResponse = resp; + resp->referenceId = req->referenceId; + resp->otherInfo = 0; + + resp->records = + pack_records(assoc, req->resultSetId, *req->resultSetStartPoint, + num, req->recordComposition, next, presst, form); + if (!resp->records) + return 0; + resp->numberOfRecordsReturned = num; + resp->presentStatus = presst; + 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 = (int *)odr_malloc (assoc->encode, sizeof(*scanStatus)); + int *numberOfEntriesReturned = + (int *)odr_malloc (assoc->encode, sizeof(*numberOfEntriesReturned)); + Z_ListEntries *ents = (Z_ListEntries *)odr_malloc (assoc->encode, sizeof(*ents)); + Z_DiagRecs *diagrecs_p = NULL; + oident *attent; + bend_scanrequest srq; + bend_scanresult *srs; + oident *attset; + + logf(LOG_LOG, "Got ScanRequest"); + *scanStatus = Z_Scan_failure; + *numberOfEntriesReturned = 0; + + apdu->which = Z_APDU_scanResponse; + apdu->u.scanResponse = res; + res->referenceId = req->referenceId; + res->stepSize = 0; + 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 + { + if (req->termListAndStartPoint->term->which == Z_Term_general) + logf(LOG_DEBUG, " term: '%.*s'", + req->termListAndStartPoint->term->u.general->len, + req->termListAndStartPoint->term->u.general->buf); + srq.num_bases = req->num_databaseNames; + srq.basenames = req->databaseNames; + srq.num_entries = *req->numberOfTermsRequested; + srq.term = req->termListAndStartPoint; + srq.stream = assoc->encode; + if (!(attset = oid_getentbyoid(req->attributeSet)) || + attset->oclass != CLASS_RECSYN) + srq.attributeset = VAL_NONE; + else + srq.attributeset = attset->value; + srq.term_position = req->preferredPositionInResponse ? + *req->preferredPositionInResponse : 1; + if (!(srs = bend_scan(assoc->backend, &srq, 0))) + diagrecs_p = diagrecs(assoc, 2, 0); + else if (srs->errcode) + diagrecs_p = diagrecs(assoc, srs->errcode, srs->errstring); else { - resp.records = 0; - resp.numberOfRecordsReturned = &nulint; - resp.nextResultSetPosition = &nulint; - resp.searchStatus = &sr; - resp.resultSetStatus = &sr; - resp.presentStatus = 0; + int i; + Z_Entry **tab = (Z_Entry **) + odr_malloc (assoc->encode, sizeof(*tab) * srs->num_entries); + + if (srs->status == BEND_SCAN_PARTIAL) + *scanStatus = Z_Scan_partial_5; + else + *scanStatus = Z_Scan_success; + ents->entries = tab; + ents->num_entries = srs->num_entries; + res->numberOfEntriesReturned = &ents->num_entries; + res->positionOfTerm = &srs->term_position; + for (i = 0; i < srs->num_entries; i++) + { + Z_Entry *e; + Z_TermInfo *t; + Odr_oct *o; + + tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e)); + if (srs->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 = &srs->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(srs->entries[i].term)); + memcpy(o->buf, srs->entries[i].term, o->len); + logf(LOG_DEBUG, " term #%d: '%s' (%d)", i, + srs->entries[i].term, srs->entries[i].occurrences); + } + else + { + Z_Records *zrecords = diagrec (assoc, + srs->entries[i].errcode, + srs->entries[i].errstring); + logf(LOG_DEBUG, " term sd code=%d addinfo=%s", + srs->entries[i].errcode, + (srs->entries[i].errstring?srs->entries[i].errstring : + "")); + assert (zrecords->which == Z_Records_NSD); + e->which = Z_Entry_surrogateDiagnostic; + e->u.surrogateDiagnostic = + zrecords->u.nonSurrogateDiagnostic; + } + } } } + 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)); + + logf(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->output_setname = req->sortedResultSetName; + bsrr->sort_sequence = req->sortSequence; + bsrr->stream = assoc->encode; + + bsrr->sort_status = Z_SortStatus_failure; + bsrr->errcode = 0; + bsrr->errstring = 0; + + ((int (*)(void *, bend_sort_rr *))(*assoc->bend_sort))(assoc->backend, bsrr); + + res->referenceId = req->referenceId; + res->sortStatus = (int *)odr_malloc (assoc->encode, sizeof(*res->sortStatus)); + *res->sortStatus = 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 { - resp.resultCount = &nulint; - resp.numberOfRecordsReturned = &nulint; - resp.nextResultSetPosition = &nulint; - resp.searchStatus = &nulint; - resp.resultSetStatus = 0; +#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)); + + logf(LOG_LOG, "Got DeleteRequest."); + + bdrr->num_setnames = req->num_resultSetList; + bdrr->setnames = req->resultSetList; + bdrr->stream = assoc->encode; + bdrr->function = *req->deleteFunction; + + ((int (*)(void *, bend_delete_rr *)) + (*assoc->bend_delete))(assoc->backend, bdrr); + + res->referenceId = req->referenceId; + + res->deleteOperationStatus = (int *) + odr_malloc (assoc->encode, sizeof(*res->deleteOperationStatus)); + *res->deleteOperationStatus = bdrr->delete_status; + + res->deleteListStatuses = 0; + res->numberNotDeleted = 0; + res->bulkStatuses = 0; + res->deleteMessage = 0; + res->otherInfo = 0; + + apdu->which = Z_APDU_deleteResultSetResponse; + apdu->u.deleteResultSetResponse = res; + return apdu; +} - if (!z_APDU(assoc->encode, &apdup, 0)) +static void process_close(association *assoc, request *reqb) +{ + Z_Close *req = reqb->request->u.close; + static char *reasons[] = { - odr_perror(assoc->encode, "Encode searchres"); - return -1; + "finished", + "shutdown", + "systemProblem", + "costLimit", + "resources", + "securityViolation", + "protocolError", + "lackOfActivity", + "peerAbort", + "unspecified" + }; + + logf(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; } - odr_getbuf(assoc->encode, &assoc->encoded_len); - odr_reset(assoc->encode); - iochan_setflags(client, EVENT_OUTPUT | EVENT_EXCEPT); - return 0; } -static int process_presentRequest(IOCHAN client, Z_PresentRequest *req) +void bend_request_send (bend_association a, bend_request req, Z_APDU *res) { - Z_APDU apdu, *apdup; - Z_PresentResponse resp; - association *assoc = iochan_getdata(client); - int presst, next, num; - - fprintf(stderr, "Got PresentRequest.\n"); - apdup = &apdu; - apdu.which = Z_APDU_presentResponse; - apdu.u.presentResponse = &resp; - resp.referenceId = req->referenceId; - - num = *req->numberOfRecordsRequested; - resp.records = pack_records(assoc, req->resultSetId, - *req->resultSetStartPoint, &num, req->elementSetNames, &next, &presst); - if (!resp.records) - return -1; - resp.numberOfRecordsReturned = # - resp.presentStatus = &presst; - resp.nextResultSetPosition = &next; - - if (!z_APDU(assoc->encode, &apdup, 0)) - { - odr_perror(assoc->encode, "Encode presentres"); - return -1; + 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) +{ + return process_request (a, req); +} + +void bend_request_setdata(bend_request r, void *p) +{ + r->clientData = p; +} + +void *bend_request_getdata(bend_request r) +{ + return r->clientData; +} + +/* Chas: Added in from DALI */ +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; + + logf(LOG_DEBUG,"inside Process esRequest"); + + esrequest.esr = reqb->request->u.extendedServicesRequest; + esrequest.stream = assoc->encode; + esrequest.errcode = 0; + esrequest.errstring = NULL; + esrequest.request = reqb; + esrequest.association = assoc; + + ((int (*)(void *, bend_esrequest_rr *))(*assoc->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 == 0 ) + { + /* Backend service indicates request will be processed */ + logf(LOG_DEBUG,"Request will be processed...Good !"); + *resp->operationStatus = Z_ExtendedServicesResponse_done; } - odr_getbuf(assoc->encode, &assoc->encoded_len); - odr_reset(assoc->encode); - iochan_setflags(client, EVENT_OUTPUT | EVENT_EXCEPT); - return 0; + else + { + /* Backend indicates error, request will not be processed */ + logf(LOG_DEBUG,"Request will not be processed...BAD !"); + *resp->operationStatus = Z_ExtendedServicesResponse_failure; + } + /* Do something with the members of bend_extendedservice */ + + logf(LOG_DEBUG,"Send the result apdu"); + + return apdu; } + +/* Chas: End of addition from DALI */