- head = reclist_insert(se->reclist, res);
-
- pull_relevance_keys(se, head, res);
-
- se->total_records++;
-
- return res;
-}
-
-static void ingest_records(struct client *cl, Z_Records *r)
-{
- struct record *rec;
- struct session *s = cl->session;
- Z_NamePlusRecordList *rlist;
- int i;
-
- if (r->which != Z_Records_DBOSD)
- return;
- rlist = r->u.databaseOrSurDiagnostics;
- for (i = 0; i < rlist->num_records; i++)
- {
- Z_NamePlusRecord *npr = rlist->records[i];
- Z_External *e;
- char *buf;
- int len;
-
- if (npr->which != Z_NamePlusRecord_databaseRecord)
- {
- yaz_log(YLOG_WARN, "Unexpected record type, probably diagnostic");
- continue;
- }
- e = npr->u.databaseRecord;
- if (e->which != Z_External_octet)
- {
- yaz_log(YLOG_WARN, "Unexpected external branch, probably BER");
- continue;
- }
- buf = (char*) e->u.octet_aligned->buf;
- len = e->u.octet_aligned->len;
-
- rec = ingest_record(cl, buf, len);
- if (!rec)
- continue;
- }
- if (s->watchlist[SESSION_WATCH_RECORDS].fun && rlist->num_records)
- session_alert_watch(s, SESSION_WATCH_RECORDS);
-}
-
-static void do_presentResponse(IOCHAN i, Z_APDU *a)
-{
- struct connection *co = iochan_getdata(i);
- struct client *cl = co->client;
- Z_PresentResponse *r = a->u.presentResponse;
-
- if (r->records) {
- Z_Records *recs = r->records;
- if (recs->which == Z_Records_NSD)
- {
- yaz_log(YLOG_WARN, "Non-surrogate diagnostic");
- cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
- cl->state = Client_Error;
- }
- }
-
- if (!*r->presentStatus && cl->state != Client_Error)
- {
- yaz_log(YLOG_DEBUG, "Good Present response");
- cl->records += *r->numberOfRecordsReturned;
- ingest_records(cl, r->records);
- cl->state = Client_Idle;
- }
- else if (*r->presentStatus)
- {
- yaz_log(YLOG_WARN, "Bad Present response");
- cl->state = Client_Error;
- }
-}
-
-static void handler(IOCHAN i, int event)
-{
- struct connection *co = iochan_getdata(i);
- struct client *cl = co->client;
- struct session *se = 0;
-
- if (cl)
- se = cl->session;
- else
- {
- yaz_log(YLOG_WARN, "Destroying orphan connection (fix me?)");
- connection_destroy(co);
- return;
- }
-
- if (co->state == Conn_Connecting && event & EVENT_OUTPUT)
- {
- int errcode;
- socklen_t errlen = sizeof(errcode);
-
- if (getsockopt(cs_fileno(co->link), SOL_SOCKET, SO_ERROR, &errcode,
- &errlen) < 0 || errcode != 0)
- {
- client_fatal(cl);
- return;
- }
- else
- {
- yaz_log(YLOG_DEBUG, "Connect OK");
- co->state = Conn_Open;
- if (cl)
- cl->state = Client_Connected;
- }
- }
-
- else if (event & EVENT_INPUT)
- {
- int len = cs_get(co->link, &co->ibuf, &co->ibufsize);
-
- if (len < 0)
- {
- yaz_log(YLOG_WARN|YLOG_ERRNO, "Error reading from Z server");
- connection_destroy(co);
- return;
- }
- else if (len == 0)
- {
- yaz_log(YLOG_WARN, "EOF reading from Z server");
- connection_destroy(co);
- return;
- }
- else if (len > 1) // We discard input if we have no connection
- {
- co->state = Conn_Open;
-
- if (cl && (cl->requestid == se->requestid || cl->state == Client_Initializing))
- {
- Z_APDU *a;
-
- odr_reset(global_parameters.odr_in);
- odr_setbuf(global_parameters.odr_in, co->ibuf, len, 0);
- if (!z_APDU(global_parameters.odr_in, &a, 0, 0))
- {
- client_fatal(cl);
- return;
- }
- switch (a->which)
- {
- case Z_APDU_initResponse:
- do_initResponse(i, a);
- break;
- case Z_APDU_searchResponse:
- do_searchResponse(i, a);
- break;
- case Z_APDU_presentResponse:
- do_presentResponse(i, a);
- break;
- default:
- yaz_log(YLOG_WARN, "Unexpected result from server");
- client_fatal(cl);
- return;
- }
- // We aren't expecting staggered output from target
- // if (cs_more(t->link))
- // iochan_setevent(i, EVENT_INPUT);
- }
- else // we throw away response and go to idle mode
- {
- yaz_log(YLOG_DEBUG, "Ignoring result of expired operation");
- cl->state = Client_Idle;
- }
- }
- /* if len==1 we do nothing but wait for more input */
- }
-
- if (cl->state == Client_Connected) {
- send_init(i);
- }
-
- if (cl->state == Client_Idle)
- {
- if (cl->requestid != se->requestid && *se->query) {
- send_search(i);
- }
- else if (cl->hits > 0 && cl->records < global_parameters.toget &&
- cl->records < cl->hits) {
- send_present(i);
- }
- }
-}
-
-// Disassociate connection from client
-static void connection_release(struct connection *co)
-{
- struct client *cl = co->client;
-
- yaz_log(YLOG_DEBUG, "Connection release %s", co->host->hostport);
- if (!cl)
- return;
- cl->connection = 0;
- co->client = 0;
-}
-
-// Close connection and recycle structure
-static void connection_destroy(struct connection *co)
-{
- struct host *h = co->host;
- cs_close(co->link);
- iochan_destroy(co->iochan);
-
- yaz_log(YLOG_DEBUG, "Connection destroy %s", co->host->hostport);
- if (h->connections == co)
- h->connections = co->next;
- else
- {
- struct connection *pco;
- for (pco = h->connections; pco && pco->next != co; pco = pco->next)
- ;
- if (pco)
- pco->next = co->next;
- else
- abort();
- }
- if (co->client)
- {
- if (co->client->state != Client_Idle)
- co->client->state = Client_Disconnected;
- co->client->connection = 0;
- }
- co->next = connection_freelist;
- connection_freelist = co;
-}
-
-// Creates a new connection for client, associated with the host of
-// client's database
-static struct connection *connection_create(struct client *cl)
-{
- struct connection *new;
- COMSTACK link;
- int res;
- void *addr;
-
- yaz_log(YLOG_DEBUG, "Connection create %s", cl->database->url);
- if (!(link = cs_create(tcpip_type, 0, PROTO_Z3950)))
- {
- yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create comstack");
- exit(1);
- }
-
- if (!(addr = cs_straddr(link, cl->database->host->ipport)))
- {
- yaz_log(YLOG_WARN|YLOG_ERRNO, "Lookup of IP address failed?");
- return 0;
- }
-
- res = cs_connect(link, addr);
- if (res < 0)
- {
- yaz_log(YLOG_WARN|YLOG_ERRNO, "cs_connect %s", cl->database->url);
- return 0;
- }
-
- if ((new = connection_freelist))
- connection_freelist = new->next;
- else
- {
- new = xmalloc(sizeof (struct connection));
- new->ibuf = 0;
- new->ibufsize = 0;
- }
- new->state = Conn_Connecting;
- new->host = cl->database->host;
- new->next = new->host->connections;
- new->host->connections = new;
- new->client = cl;
- cl->connection = new;
- new->link = link;
-
- new->iochan = iochan_create(cs_fileno(link), handler, 0);
- iochan_setdata(new->iochan, new);
- new->iochan->next = channel_list;
- channel_list = new->iochan;
- return new;
-}
-
-// Close connection and set state to error
-static void client_fatal(struct client *cl)
-{
- yaz_log(YLOG_WARN, "Fatal error from %s", cl->database->url);
- connection_destroy(cl->connection);
- cl->state = Client_Error;
-}
-
-// Ensure that client has a connection associated
-static int client_prep_connection(struct client *cl)
-{
- struct connection *co;
- struct session *se = cl->session;
- struct host *host = cl->database->host;
-
- co = cl->connection;
-
- yaz_log(YLOG_DEBUG, "Client prep %s", cl->database->url);
-
- if (!co)
- {
- // See if someone else has an idle connection
- // We should look at timestamps here to select the longest-idle connection
- for (co = host->connections; co; co = co->next)
- if (co->state == Conn_Open && (!co->client || co->client->session != se))
- break;
- if (co)
- {
- connection_release(co);
- cl->connection = co;
- co->client = cl;
- }
- else
- co = connection_create(cl);
- }
- if (co)
- {
- if (co->state == Conn_Connecting)
- cl->state = Client_Connecting;
- else if (co->state == Conn_Open)
- {
- if (cl->state == Client_Error || cl->state == Client_Disconnected)
- cl->state = Client_Idle;
- }
- iochan_setflag(co->iochan, EVENT_OUTPUT);
- return 1;
- }
- else
- return 0;
-}
-
-void load_simpletargets(const char *fn)
-{
- FILE *f = fopen(fn, "r");
- char line[256];
-
- if (!f)
- {
- yaz_log(YLOG_WARN|YLOG_ERRNO, "open %s", fn);
- exit(1);
- }
-
- while (fgets(line, 255, f))
- {
- char *url, *db;
- struct host *host;
- struct database *database;
-
- if (strncmp(line, "target ", 7))
- continue;
- url = line + 7;
- url[strlen(url) - 1] = '\0';
- yaz_log(YLOG_DEBUG, "Target: %s", url);
- if ((db = strchr(url, '/')))
- *(db++) = '\0';
- else
- db = "Default";
-
- for (host = hosts; host; host = host->next)
- if (!strcmp(url, host->hostport))
- break;
- if (!host)
- {
- struct addrinfo *addrinfo, hints;
- char *port;
- char ipport[128];
- unsigned char addrbuf[4];
- int res;
-
- host = xmalloc(sizeof(struct host));
- host->hostport = xstrdup(url);
- host->connections = 0;
-
- if ((port = strchr(url, ':')))
- *(port++) = '\0';
- else
- port = "210";
-
- hints.ai_flags = 0;
- hints.ai_family = PF_INET;
- hints.ai_socktype = SOCK_STREAM;
- hints.ai_protocol = IPPROTO_TCP;
- hints.ai_addrlen = 0;
- hints.ai_addr = 0;
- hints.ai_canonname = 0;
- hints.ai_next = 0;
- // This is not robust code. It assumes that getaddrinfo returns AF_INET
- // address.
- if ((res = getaddrinfo(url, port, &hints, &addrinfo)))
- {
- yaz_log(YLOG_WARN, "Failed to resolve %s: %s", url, gai_strerror(res));
- xfree(host->hostport);
- xfree(host);
- continue;
- }
- assert(addrinfo->ai_family == PF_INET);
- memcpy(addrbuf, &((struct sockaddr_in*)addrinfo->ai_addr)->sin_addr.s_addr, 4);
- sprintf(ipport, "%hhd.%hhd.%hhd.%hhd:%s",
- addrbuf[0], addrbuf[1], addrbuf[2], addrbuf[3], port);
- host->ipport = xstrdup(ipport);
- freeaddrinfo(addrinfo);
- host->next = hosts;
- hosts = host;
- }
- database = xmalloc(sizeof(struct database));
- database->host = host;
- database->url = xmalloc(strlen(url) + strlen(db) + 2);
- strcpy(database->url, url);
- strcat(database->url, "/");
- strcat(database->url, db);
-
- database->databases = xmalloc(2 * sizeof(char *));
- database->databases[0] = xstrdup(db);
- database->databases[1] = 0;
- database->errors = 0;
- database->next = databases;
- databases = database;
-
- }
- fclose(f);
-}
-
-static void pull_terms(NMEM nmem, struct ccl_rpn_node *n, char **termlist, int *num)
-{
- switch (n->kind)
- {
- case CCL_RPN_AND:
- case CCL_RPN_OR:
- case CCL_RPN_NOT:
- case CCL_RPN_PROX:
- pull_terms(nmem, n->u.p[0], termlist, num);
- pull_terms(nmem, n->u.p[1], termlist, num);
- break;
- case CCL_RPN_TERM:
- termlist[(*num)++] = nmem_strdup(nmem, n->u.t.term);
- break;
- default: // NOOP
- break;
- }
-}
-
-// Extract terms from query into null-terminated termlist
-static int extract_terms(NMEM nmem, char *query, char **termlist)
-{
- int error, pos;
- struct ccl_rpn_node *n;
- int num = 0;
-
- n = ccl_find_str(global_parameters.ccl_filter, query, &error, &pos);
- if (!n)
- return -1;
- pull_terms(nmem, n, termlist, &num);
- termlist[num] = 0;
- ccl_rpn_delete(n);
- return 0;
-}
-
-static struct client *client_create(void)
-{
- struct client *r;
- if (client_freelist)
- {
- r = client_freelist;
- client_freelist = client_freelist->next;
- }
- else
- r = xmalloc(sizeof(struct client));
- r->database = 0;
- r->connection = 0;
- r->session = 0;
- r->hits = 0;
- r->records = 0;
- r->setno = 0;
- r->requestid = -1;
- r->diagnostic = 0;
- r->state = Client_Disconnected;
- r->next = 0;
- return r;
-}
-
-void client_destroy(struct client *c)
-{
- struct session *se = c->session;
- if (c == se->clients)
- se->clients = c->next;
- else
- {
- struct client *cc;
- for (cc = se->clients; cc && cc->next != c; cc = cc->next)
- ;
- if (cc)
- cc->next = c->next;
- }
- if (c->connection)
- connection_release(c->connection);
- c->next = client_freelist;
- client_freelist = c;
-}
-
-void session_set_watch(struct session *s, int what, session_watchfun fun, void *data)
-{
- s->watchlist[what].fun = fun;
- s->watchlist[what].data = data;
-}
-
-void session_alert_watch(struct session *s, int what)
-{
- if (!s->watchlist[what].fun)
- return;
- (*s->watchlist[what].fun)(s->watchlist[what].data);
- s->watchlist[what].fun = 0;
- s->watchlist[what].data = 0;
-}
-
-// This should be extended with parameters to control selection criteria
-// Associates a set of clients with a session;
-int select_targets(struct session *se)
-{
- struct database *db;
- int c = 0;
-
- while (se->clients)
- client_destroy(se->clients);
- for (db = databases; db; db = db->next)
- {
- struct client *cl = client_create();
- cl->database = db;
- cl->session = se;
- cl->next = se->clients;
- se->clients = cl;
- c++;
- }
- return c;
-}
-
-char *search(struct session *se, char *query)
-{
- int live_channels = 0;
- struct client *cl;
-
- yaz_log(YLOG_DEBUG, "Search");
-
- strcpy(se->query, query);
- se->requestid++;
- nmem_reset(se->nmem);
- for (cl = se->clients; cl; cl = cl->next)
- {
- cl->hits = -1;
- cl->records = 0;
- cl->diagnostic = 0;
-
- if (client_prep_connection(cl))
- live_channels++;
- }
- if (live_channels)
- {
- char *p[512];
- int maxrecs = live_channels * global_parameters.toget;
- se->termlist = termlist_create(se->nmem, maxrecs, 15);
- se->reclist = reclist_create(se->nmem, maxrecs);
- extract_terms(se->nmem, query, p);
- se->relevance = relevance_create(se->nmem, (const char **) p, maxrecs);
- se->total_records = se->total_hits = 0;
- }
- else
- return "NOTARGETS";
-
- return 0;
-}
-
-void destroy_session(struct session *s)
-{
- yaz_log(YLOG_LOG, "Destroying session");
- while (s->clients)
- client_destroy(s->clients);
- nmem_destroy(s->nmem);
- wrbuf_free(s->wrbuf, 1);
-}
-
-struct session *new_session()
-{
- int i;
- struct session *session = xmalloc(sizeof(*session));
-
- yaz_log(YLOG_DEBUG, "New pazpar2 session");
-
- session->total_hits = 0;
- session->total_records = 0;
- session->termlist = 0;
- session->reclist = 0;
- session->requestid = -1;
- session->clients = 0;
- session->query[0] = '\0';
- session->nmem = nmem_create();
- session->wrbuf = wrbuf_alloc();
- for (i = 0; i <= SESSION_WATCH_MAX; i++)
- {
- session->watchlist[i].data = 0;
- session->watchlist[i].fun = 0;
- }
-
- select_targets(session);
-
- return session;
-}
-
-struct hitsbytarget *hitsbytarget(struct session *se, int *count)
-{
- static struct hitsbytarget res[1000]; // FIXME MM
- struct client *cl;
-
- *count = 0;
- for (cl = se->clients; cl; cl = cl->next)
- {
- strcpy(res[*count].id, cl->database->host->hostport);
- res[*count].hits = cl->hits;
- res[*count].records = cl->records;
- res[*count].diagnostic = cl->diagnostic;
- res[*count].state = client_states[cl->state];
- res[*count].connected = cl->connection ? 1 : 0;
- (*count)++;
- }
-
- return res;
-}
-
-struct termlist_score **termlist(struct session *s, int *num)
-{
- return termlist_highscore(s->termlist, num);
-}
-
-void report_nmem_stats(void)
-{
- size_t in_use, is_free;
-
- nmem_get_memory_in_use(&in_use);
- nmem_get_memory_free(&is_free);
-
- yaz_log(YLOG_LOG, "nmem stat: use=%ld free=%ld",
- (long) in_use, (long) is_free);
-}
-
-struct record **show(struct session *s, int start, int *num, int *total,
- int *sumhits, NMEM nmem_show)
-{
- struct record **recs = nmem_malloc(nmem_show, *num
- * sizeof(struct record *));
- int i;
-
- relevance_prepare_read(s->relevance, s->reclist);
-
- *total = s->reclist->num_records;
- *sumhits = s->total_hits;
-
- for (i = 0; i < start; i++)
- if (!reclist_read_record(s->reclist))
- {
- *num = 0;
- return 0;
- }
-
- for (i = 0; i < *num; i++)
- {
- struct record *r = reclist_read_record(s->reclist);
- if (!r)
- {
- *num = i;
- break;
- }
- recs[i] = r;
- }
- return recs;
-}
-
-void statistics(struct session *se, struct statistics *stat)
-{
- struct client *cl;
- int count = 0;
-
- bzero(stat, sizeof(*stat));
- for (cl = se->clients; cl; cl = cl->next)
- {
- if (!cl->connection)
- stat->num_no_connection++;
- switch (cl->state)
- {
- case Client_Connecting: stat->num_connecting++; break;
- case Client_Initializing: stat->num_initializing++; break;
- case Client_Searching: stat->num_searching++; break;
- case Client_Presenting: stat->num_presenting++; break;
- case Client_Idle: stat->num_idle++; break;
- case Client_Failed: stat->num_failed++; break;
- case Client_Error: stat->num_error++; break;
- default: break;
- }
- count++;
- }
- stat->num_hits = se->total_hits;
- stat->num_records = se->total_records;
-
- stat->num_clients = count;
-}