2 * Copyright (c) 2016, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of JANET(UK) nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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37 #include <trust_router/tr_dh.h>
38 #include <tid_internal.h>
39 #include <tr_filter.h>
43 #include <tr_rp_client.h>
47 #include <trp_route.h>
48 #include <trp_internal.h>
49 #include <tr_config.h>
55 /* Structure to hold data for the tid response callback */
56 typedef struct tr_resp_cookie {
61 /* hold a tids instance and a config manager */
62 struct tr_tids_event_cookie {
68 static void tr_tidc_resp_handler(TIDC_INSTANCE *tidc,
73 TR_RESP_COOKIE *cookie=talloc_get_type_abort(resp_cookie, TR_RESP_COOKIE);
75 tr_debug("tr_tidc_resp_handler: Response received! Realm = %s, Community = %s, result = %s.",
78 (TID_SUCCESS==resp->result)?"success":"error");
80 if (resp->error_path!=NULL)
81 tr_debug("tr_tids_resp_handler: error_path is set.");
82 cookie->resp=tid_resp_dup(cookie, resp);
85 /* data for AAA req forwarding threads */
86 struct tr_tids_fwd_cookie {
88 pthread_mutex_t mutex; /* lock on the mq (separate from the locking within the mq, see below) */
89 TR_MQ *mq; /* messages from thread to main process; set to NULL to disable response */
90 TR_AAA_SERVER *aaa; /* AAA server to contact */
92 TID_REQ *fwd_req; /* the req to duplicate */
95 static int tr_tids_fwd_cookie_destructor(void *obj)
97 struct tr_tids_fwd_cookie *c=talloc_get_type_abort(obj, struct tr_tids_fwd_cookie);
98 if (c->dh_params!=NULL)
99 tr_destroy_dh_params(c->dh_params);
103 /* Block until we get the lock, returns 0 on success.
104 * The mutex is used to protect changes to the mq pointer in
105 * a thread's cookie. The master thread sets this to null to indicate
106 * that it has abandoned the thread and the message queue is no longer
107 * valid. This is unrelated to the locking in the message queue
108 * implementation itself. */
109 static int tr_tids_fwd_get_mutex(struct tr_tids_fwd_cookie *cookie)
114 return (pthread_mutex_lock(&(cookie->mutex)));
117 static int tr_tids_fwd_release_mutex(struct tr_tids_fwd_cookie *cookie)
122 return (pthread_mutex_unlock(&(cookie->mutex)));
125 /* values for messages */
126 #define TR_TID_MQMSG_SUCCESS "tid success"
127 #define TR_TID_MQMSG_FAILURE "tid failure"
129 /* Thread main for sending and receiving a request to a single AAA server */
130 static void *tr_tids_req_fwd_thread(void *arg)
132 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
133 struct tr_tids_fwd_cookie *args=talloc_get_type_abort(arg, struct tr_tids_fwd_cookie);
134 TIDC_INSTANCE *tidc=tidc_create();
136 TR_RESP_COOKIE *cookie=NULL;
137 char *aaa_hostname = NULL;
142 talloc_steal(tmp_ctx, args); /* take responsibility for the cookie */
145 talloc_steal(tmp_ctx, tidc);
147 /* create the cookie we will use for our response */
148 cookie=talloc(tmp_ctx, TR_RESP_COOKIE);
150 tr_crit("tr_tids_req_fwd_thread: unable to allocate response cookie.");
154 cookie->thread_id=args->thread_id;
155 tr_debug("tr_tids_req_fwd_thread: thread %d started.", cookie->thread_id);
157 /* Create a TID client instance */
159 tr_crit("tr_tids_req_fwd_thread: Unable to allocate TIDC instance.");
160 /*tids_send_err_response(tids, orig_req, "Memory allocation failure");*/
161 /* TODO: encode reason for failure */
166 /* Set-up TID connection */
167 aaa_hostname = tr_name_strdup(tr_aaa_server_get_hostname(args->aaa));
168 if (aaa_hostname == NULL) {
169 tr_crit("tr_tids_req_fwd_thread: unable to allocate AAA hostname string");
173 aaa_port = tr_aaa_server_get_port(args->aaa);
174 if ((aaa_port <= 0) || (aaa_port > 65535)) {
175 tr_notice("tr_tids_req_fwd_thread: invalid port (%d) for %s", aaa_port, aaa_hostname);
180 if (-1==(args->fwd_req->conn = tidc_open_connection(tidc,
183 &(args->fwd_req->gssctx)))) {
184 tr_notice("tr_tids_req_fwd_thread: Error in tidc_open_connection.");
185 /* tids_send_err_response(tids, orig_req, "Can't open connection to next hop TIDS"); */
186 /* TODO: encode reason for failure */
190 tr_debug("tr_tids_req_fwd_thread: thread %d opened TID connection to %s:%d.",
191 cookie->thread_id, aaa_hostname, aaa_port);
193 /* Send a TID request. */
194 if (0 > (rc = tidc_fwd_request(tidc, args->fwd_req, tr_tidc_resp_handler, (void *)cookie))) {
195 tr_notice("Error from tidc_fwd_request, rc = %d.", rc);
199 /* cookie->resp should now contain our copy of the response */
201 tr_debug("tr_tids_req_fwd_thread: thread %d received response.", cookie->thread_id);
204 /* Notify parent thread of the response, if it's still listening. */
205 if (0!=tr_tids_fwd_get_mutex(args)) {
206 tr_notice("tr_tids_req_fwd_thread: thread %d unable to acquire mutex.", cookie->thread_id);
207 } else if (NULL!=args->mq) {
208 /* mq is still valid, so we can queue our response */
209 tr_debug("tr_tids_req_fwd_thread: thread %d using valid msg queue.", cookie->thread_id);
211 msg= tr_mq_msg_new(tmp_ctx, TR_TID_MQMSG_SUCCESS);
213 msg= tr_mq_msg_new(tmp_ctx, TR_TID_MQMSG_FAILURE);
216 tr_notice("tr_tids_req_fwd_thread: thread %d unable to allocate response msg.", cookie->thread_id);
218 tr_mq_msg_set_payload(msg, (void *)cookie, NULL);
220 talloc_steal(msg, cookie); /* attach this to the msg so we can forget about it */
221 tr_mq_add(args->mq, msg);
222 talloc_steal(NULL, args); /* take out of our tmp_ctx; master thread now responsible for freeing */
223 tr_debug("tr_tids_req_fwd_thread: thread %d queued response message.", cookie->thread_id);
224 if (0!=tr_tids_fwd_release_mutex(args))
225 tr_notice("tr_tids_req_fwd_thread: Error releasing mutex.");
228 if (aaa_hostname != NULL)
231 talloc_free(tmp_ctx);
235 /* Merges r2 into r1 if they are compatible. */
236 static TID_RC tr_tids_merge_resps(TID_RESP *r1, TID_RESP *r2)
238 /* ensure these are compatible replies */
239 if ((r1->result!=TID_SUCCESS) || (r2->result!=TID_SUCCESS))
242 if ((0 == tr_name_cmp(r1->rp_realm, r2->rp_realm))
243 && (0 == tr_name_cmp(r1->realm, r2->realm))
244 && ( (0 == tr_name_cmp(r1->comm, r2->comm))
245 || (0 == tr_name_cmp(r1->comm, r2->orig_coi))
246 || (0 == tr_name_cmp(r1->orig_coi, r2->comm)))) {
248 tid_srvr_blk_add(r1->servers, tid_srvr_blk_dup(r1, r2->servers));
255 enum map_coi_result {
257 MAP_COI_MAP_NOT_REQUIRED,
258 MAP_COI_ALREADY_MAPPED,
261 MAP_COI_UNKNOWN_COMM,
265 static enum map_coi_result map_coi(TR_COMM_TABLE *ctable, TID_REQ *req)
272 if (tid_req_get_orig_coi(req) != NULL)
273 return MAP_COI_ALREADY_MAPPED;
275 /* look up the community */
276 orig_comm = tr_comm_table_find_comm(ctable, tid_req_get_comm(req));
277 if (orig_comm == NULL)
278 return MAP_COI_UNKNOWN_COMM;
280 if (tr_comm_get_type(orig_comm) == TR_COMM_APC)
281 return MAP_COI_MAP_NOT_REQUIRED; /* it was already an APC, no mapping to do */
283 /* use first (only) APC. These are just APC names */
284 apcs = tr_comm_get_apcs(orig_comm);
285 if ((!apcs) || (!tr_apc_get_id(apcs)))
286 return MAP_COI_NO_APC;
288 /* get our own copy of the APC name */
289 apc_name = tr_dup_name(tr_apc_get_id(apcs));
290 if (apc_name == NULL) {
291 tr_err("map_coi: Error allocating apc_name");
292 return MAP_COI_ERROR;
295 /* Check that the APC is configured */
296 apc = tr_comm_table_find_comm(ctable, apc_name);
298 tr_free_name(apc_name);
299 return MAP_COI_INVALID_APC;
302 tid_req_set_orig_coi(req, tid_req_get_comm(req)); /* was null, so no need to free anything */
303 tid_req_set_comm(req, apc_name); /* original contents will be freed via orig_coi */
305 return MAP_COI_SUCCESS; /* successfully mapped */
309 * Process a TID request
311 * Return value of -1 means to send a TID_ERROR response. Fill in resp->err_msg or it will
312 * be returned as a generic error.
320 static int tr_tids_req_handler(TIDS_INSTANCE *tids,
325 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
326 TR_AAA_SERVER *aaa_servers=NULL, *this_aaa=NULL;
329 TR_AAA_SERVER_ITER *aaa_iter=NULL;
330 pthread_t aaa_thread[TR_TID_MAX_AAA_SERVERS];
331 struct tr_tids_fwd_cookie *aaa_cookie[TR_TID_MAX_AAA_SERVERS]={NULL};
332 TID_RESP *aaa_resp[TR_TID_MAX_AAA_SERVERS]={NULL};
333 TR_RP_CLIENT *rp_client=NULL;
334 TR_RP_CLIENT_ITER *rpc_iter=NULL;
335 TID_REQ *fwd_req = NULL;
336 TR_COMM *cfg_comm = NULL;
337 TR_COMM *cfg_apc = NULL;
338 TR_FILTER_ACTION oaction = TR_FILTER_ACTION_REJECT;
339 time_t expiration_interval=0;
340 struct tr_tids_event_cookie *cookie=talloc_get_type_abort(cookie_in, struct tr_tids_event_cookie);
341 TR_CFG_MGR *cfg_mgr=cookie->cfg_mgr;
342 TRPS_INSTANCE *trps=cookie->trps;
343 TRP_ROUTE *route=NULL;
346 unsigned int n_responses=0;
347 unsigned int n_failed=0;
348 struct timespec ts_abort={0};
349 unsigned int resp_frac_numer=cfg_mgr->active->internal->tid_resp_numer;
350 unsigned int resp_frac_denom=cfg_mgr->active->internal->tid_resp_denom;
351 TR_RESP_COOKIE *payload=NULL;
352 TR_FILTER_TARGET *target=NULL;
356 if ((!tids) || (!orig_req) || (!resp)) {
357 tr_debug("tr_tids_req_handler: Bad parameters");
362 tr_debug("tr_tids_req_handler: Request received (conn = %d)! Realm = %s, Comm = %s", orig_req->conn,
363 orig_req->realm->buf, orig_req->comm->buf);
364 if (orig_req->request_id)
365 tr_debug("tr_tids_req_handler: TID request ID: %.*s", orig_req->request_id->len, orig_req->request_id->buf);
367 tr_debug("tr_tids_req_handler: TID request ID: none");
371 /* Duplicate the request, so we can modify and forward it */
372 if (NULL == (fwd_req=tid_dup_req(orig_req))) {
373 tr_debug("tr_tids_req_handler: Unable to duplicate request.");
374 retval=-1; /* response will be a generic internal error */
377 talloc_steal(tmp_ctx, fwd_req);
379 /* cfg_comm is now the community (APC or CoI) of the incoming request */
380 if (NULL == (cfg_comm=tr_comm_table_find_comm(cfg_mgr->active->ctable, orig_req->comm))) {
381 tr_notice("tr_tids_req_hander: Request for unknown comm: %s.", orig_req->comm->buf);
382 tid_resp_set_err_msg(resp, tr_new_name("Unknown community"));
387 /* We now need to apply the filters associated with the RP client handing us the request.
388 * It is possible (or even likely) that more than one client is associated with the GSS
389 * name we got from the authentication. We will apply all of them in an arbitrary order.
390 * For this to result in well-defined behavior, either only accept or only reject filter
391 * lines should be used, or a unique GSS name must be given for each RP realm. */
393 if (!tids->gss_name) {
394 tr_notice("tr_tids_req_handler: No GSS name for incoming request.");
395 tid_resp_set_err_msg(resp, tr_new_name("No GSS name for request"));
400 /* Keep original constraints, may add more from the filter. These will be added to orig_req as
401 * well. Need to verify that this is acceptable behavior, but it's what we've always done. */
402 fwd_req->cons=orig_req->cons;
404 target=tr_filter_target_tid_req(tmp_ctx, orig_req);
406 tr_crit("tid_req_handler: Unable to allocate filter target, cannot apply filter!");
407 tid_resp_set_err_msg(resp, tr_new_name("Incoming TID request filter error"));
412 rpc_iter=tr_rp_client_iter_new(tmp_ctx);
413 if (rpc_iter==NULL) {
414 tr_err("tid_req_handler: Unable to allocate RP client iterator.");
418 for (rp_client=tr_rp_client_iter_first(rpc_iter, cfg_mgr->active->rp_clients);
420 rp_client=tr_rp_client_iter_next(rpc_iter)) {
422 if (!tr_gss_names_matches(rp_client->gss_names, tids->gss_name))
423 continue; /* skip any that don't match the GSS name */
425 if (TR_FILTER_MATCH == tr_filter_apply(target,
426 tr_filter_set_get(rp_client->filters,
427 TR_FILTER_TYPE_TID_INBOUND),
430 break; /* Stop looking, oaction is set */
433 /* We get here whether or not a filter matched. If tr_filter_apply() doesn't match, it returns
434 * a default action of reject, so we don't have to check why we exited the loop. */
435 if (oaction != TR_FILTER_ACTION_ACCEPT) {
436 tr_notice("tr_tids_req_handler: Incoming TID request rejected by RP client filter for GSS name %.*s",
437 tids->gss_name->len, tids->gss_name->buf);
438 tid_resp_set_err_msg(resp, tr_new_name("Incoming TID request filter error"));
443 /* Check that the rp_realm is a member of the community in the request */
444 if (NULL == tr_comm_find_rp(cfg_mgr->active->ctable, cfg_comm, orig_req->rp_realm)) {
445 tr_notice("tr_tids_req_handler: RP Realm (%s) not member of community (%s).",
446 orig_req->rp_realm->buf, orig_req->comm->buf);
447 tid_resp_set_err_msg(resp, tr_new_name("RP community membership error"));
452 switch(map_coi(cfg_mgr->active->ctable, fwd_req)) {
453 case MAP_COI_MAP_NOT_REQUIRED:
457 case MAP_COI_SUCCESS:
458 cfg_apc = tr_comm_table_find_comm(cfg_mgr->active->ctable, tid_req_get_comm(fwd_req));
459 tr_debug("tr_tids_req_handler: Community %.*s is a COI, mapping to APC %.*s.",
460 tid_req_get_orig_coi(fwd_req)->len, tid_req_get_orig_coi(fwd_req)->buf,
461 tr_comm_get_id(cfg_apc)->len, tr_comm_get_id(cfg_apc)->buf);
464 case MAP_COI_ALREADY_MAPPED:
465 tr_notice("tr_tids_req_handler: community %.*s is COI but COI to APC mapping already occurred. Dropping request.",
466 tid_req_get_comm(orig_req)->len, tid_req_get_comm(orig_req)->buf);
467 tid_resp_set_err_msg(resp, tr_new_name("Second COI to APC mapping would result, permitted only once."));
472 tr_notice("No valid APC for COI %.*s.",
473 tid_req_get_comm(orig_req)->len, tid_req_get_comm(orig_req)->buf);
474 tid_resp_set_err_msg(resp, tr_new_name("No valid APC for community"));
478 case MAP_COI_INVALID_APC:
479 tr_notice("tr_tids_req_hander: Request for unknown APC.");
480 tid_resp_set_err_msg(resp, tr_new_name("Unknown APC"));
485 tr_notice("tr_tids_req_hander: Unexpected error mapping COI to APC.");
490 /* cfg_comm is now the original community, and cfg_apc is the APC it belongs to. These
491 * may both be the same. If not, check that rp_realm is a member of the mapped APC */
492 if ((cfg_apc != cfg_comm)
493 && (NULL == tr_comm_find_rp(cfg_mgr->active->ctable,
495 tid_req_get_rp_realm(fwd_req)))) {
496 tr_notice("tr_tids_req_hander: RP Realm (%.*s) not member of mapped APC (%.*s).",
497 tid_req_get_rp_realm(fwd_req)->len, tid_req_get_rp_realm(fwd_req)->buf,
498 tr_comm_get_id(cfg_apc)->len, tr_comm_get_id(cfg_apc)->buf);
499 tid_resp_set_err_msg(resp, tr_new_name("RP community membership error"));
504 /* Look up the route for forwarding request's community/realm. */
505 tr_debug("tr_tids_req_handler: looking up route.");
506 route=trps_get_selected_route(trps, fwd_req->comm, fwd_req->realm);
508 /* No route. Use default AAA servers if we have them. */
509 tr_debug("tr_tids_req_handler: No route for realm %s, defaulting.", fwd_req->realm->buf);
510 if (NULL == (aaa_servers = tr_default_server_lookup(cfg_mgr->active->default_servers,
512 tr_notice("tr_tids_req_handler: No default AAA servers, discarded.");
513 tid_resp_set_err_msg(resp, tr_new_name("No path to AAA Server(s) for realm"));
519 /* Found a route. Determine the AAA servers or next hop address for the request we are forwarding. */
520 tr_debug("tr_tids_req_handler: found route.");
521 if (trp_route_is_local(route)) {
522 tr_debug("tr_tids_req_handler: route is local.");
523 aaa_servers = tr_idp_aaa_server_lookup(cfg_mgr->active->ctable->idp_realms,
528 tr_debug("tr_tids_req_handler: route not local.");
529 aaa_servers = tr_aaa_server_new(tmp_ctx); /* cleaned up via talloc */
530 if (aaa_servers == NULL) {
531 tr_err("tr_tids_req_handler: error allocating next hop");
535 tr_aaa_server_set_hostname(aaa_servers, trp_route_dup_next_hop(route));
536 if (tr_aaa_server_get_hostname(aaa_servers) == NULL) {
537 tr_err("tr_tids_req_handler: error allocating next hop");
541 tr_aaa_server_set_port(aaa_servers, trp_route_get_next_hop_port(route));
545 /* Since we aren't defaulting, check idp coi and apc membership of the original request */
546 if (NULL == (tr_comm_find_idp(cfg_mgr->active->ctable, cfg_comm, orig_req->realm))) {
547 tr_notice("tr_tids_req_handler: IDP Realm (%s) not member of community (%s).", orig_req->realm->buf, cfg_comm->id->buf);
548 tid_resp_set_err_msg(resp, tr_new_name("IDP community membership error"));
552 if ( cfg_apc && (NULL == (tr_comm_find_idp(cfg_mgr->active->ctable, cfg_apc, orig_req->realm)))) {
553 tr_notice("tr_tids_req_handler: IDP Realm (%s) not member of APC (%s).", orig_req->realm->buf, cfg_apc->id->buf);
554 tid_resp_set_err_msg(resp, tr_new_name("IDP APC membership error"));
560 /* Make sure we came through with a AAA server. If not, we can't handle the request.
561 * Report using the original request, not translated values. */
562 if (NULL == aaa_servers) {
563 tr_notice("tr_tids_req_handler: no route or AAA server for realm (%s) in community (%s).",
564 orig_req->realm->buf, orig_req->comm->buf);
565 tid_resp_set_err_msg(resp, tr_new_name("Missing trust route error"));
570 /* send a TID request to the AAA server(s), and get the answer(s) */
571 tr_debug("tr_tids_req_handler: sending TID request(s).");
572 /* Use the smaller of the APC's expiration interval and the expiration interval of the incoming request */
573 expiration_interval = cfg_apc->expiration_interval;
574 if (fwd_req->expiration_interval)
575 fwd_req->expiration_interval = (expiration_interval < fwd_req->expiration_interval) ? expiration_interval : fwd_req->expiration_interval;
577 fwd_req->expiration_interval = expiration_interval;
579 /* Set up message queue for replies from req forwarding threads */
580 mq=tr_mq_new(tmp_ctx);
582 tr_notice("tr_tids_req_handler: unable to allocate message queue.");
586 tr_debug("tr_tids_req_handler: message queue allocated.");
589 aaa_iter=tr_aaa_server_iter_new(tmp_ctx);
590 if (aaa_iter==NULL) {
591 tr_notice("tr_tids_req_handler: unable to allocate AAA server iterator.");
595 for (n_aaa=0, this_aaa=tr_aaa_server_iter_first(aaa_iter, aaa_servers);
597 n_aaa++, this_aaa=tr_aaa_server_iter_next(aaa_iter)) {
598 tr_debug("tr_tids_req_handler: Preparing to start thread %d.", n_aaa);
600 aaa_cookie[n_aaa]=talloc(tmp_ctx, struct tr_tids_fwd_cookie);
601 if (aaa_cookie[n_aaa]==NULL) {
602 tr_notice("tr_tids_req_handler: unable to allocate cookie for AAA thread %d.", n_aaa);
606 talloc_set_destructor((void *)(aaa_cookie[n_aaa]), tr_tids_fwd_cookie_destructor);
607 /* fill in the cookie. To ensure the thread has valid data even if we exit first and
608 * abandon it, duplicate anything pointed to (except the mq). */
609 aaa_cookie[n_aaa]->thread_id=n_aaa;
610 if (0!=pthread_mutex_init(&(aaa_cookie[n_aaa]->mutex), NULL)) {
611 tr_notice("tr_tids_req_handler: unable to init mutex for AAA thread %d.", n_aaa);
615 aaa_cookie[n_aaa]->mq=mq;
616 aaa_cookie[n_aaa]->aaa=this_aaa;
617 aaa_cookie[n_aaa]->dh_params=tr_dh_dup(orig_req->tidc_dh);
618 aaa_cookie[n_aaa]->fwd_req=tid_dup_req(fwd_req);
619 talloc_steal(aaa_cookie[n_aaa], aaa_cookie[n_aaa]->fwd_req);
620 tr_debug("tr_tids_req_handler: cookie %d initialized.", n_aaa);
622 /* Take the cookie out of tmp_ctx before starting thread. If thread starts, it becomes
623 * responsible for freeing it until it queues a response. If we did not do this, the possibility
624 * exists that this function exits, freeing the cookie, before the thread takes the cookie
625 * out of our tmp_ctx. This would cause a segfault or talloc error in the thread. */
626 talloc_steal(NULL, aaa_cookie[n_aaa]);
627 if (0!=pthread_create(&(aaa_thread[n_aaa]), NULL, tr_tids_req_fwd_thread, aaa_cookie[n_aaa])) {
628 talloc_steal(tmp_ctx, aaa_cookie[n_aaa]); /* thread start failed; steal this back */
629 tr_notice("tr_tids_req_handler: unable to start AAA thread %d.", n_aaa);
633 tr_debug("tr_tids_req_handler: thread %d started.", n_aaa);
636 /* determine expiration time */
637 if (0!=tr_mq_pop_timeout(cfg_mgr->active->internal->tid_req_timeout, &ts_abort)) {
638 tr_notice("tr_tids_req_handler: unable to read clock for timeout.");
643 /* wait for responses */
644 tr_debug("tr_tids_req_handler: waiting for response(s).");
647 while (((n_responses+n_failed)<n_aaa) &&
648 (NULL!=(msg=tr_mq_pop(mq, &ts_abort)))) {
649 /* process message */
650 if (0==strcmp(tr_mq_msg_get_message(msg), TR_TID_MQMSG_SUCCESS)) {
651 payload=talloc_get_type_abort(tr_mq_msg_get_payload(msg), TR_RESP_COOKIE);
652 talloc_steal(tmp_ctx, payload); /* put this back in our context */
653 aaa_resp[payload->thread_id]=payload->resp; /* save pointers to these */
655 if (payload->resp->result==TID_SUCCESS) {
656 tr_tids_merge_resps(resp, payload->resp);
660 tr_notice("tr_tids_req_handler: TID error received from AAA server %d: %.*s",
662 payload->resp->err_msg->len,
663 payload->resp->err_msg->buf);
665 } else if (0==strcmp(tr_mq_msg_get_message(msg), TR_TID_MQMSG_FAILURE)) {
668 payload=talloc_get_type(tr_mq_msg_get_payload(msg), TR_RESP_COOKIE);
670 talloc_steal(tmp_ctx, payload); /* put this back in our context */
672 /* this means the thread was unable to allocate a response cookie, and we thus cannot determine which thread it was. This is bad and should never happen in a working system.. Give up. */
673 tr_notice("tr_tids_req_handler: TID request thread sent invalid reply. Aborting!");
677 tr_notice("tr_tids_req_handler: TID request for AAA server %d failed.",
680 /* unexpected message */
681 tr_err("tr_tids_req_handler: Unexpected message received. Aborting!");
686 /* Set the cookie pointer to NULL so we know we've dealt with this one. The
687 * cookie itself is in our tmp_ctx, which we'll free before exiting. Let it hang
688 * around in case we are still using pointers to elements of the cookie. */
689 aaa_cookie[payload->thread_id]=NULL;
693 /* check whether we've received enough responses to exit */
694 if ((idp_shared && (n_responses>0)) ||
695 (resp_frac_denom*n_responses>=resp_frac_numer*n_aaa))
699 tr_debug("tr_tids_req_handler: done waiting for responses. %d responses, %d failures.",
700 n_responses, n_failed);
701 /* Inform any remaining threads that we will no longer handle their responses. */
702 for (ii=0; ii<n_aaa; ii++) {
703 if (aaa_cookie[ii]!=NULL) {
704 if (0!=tr_tids_fwd_get_mutex(aaa_cookie[ii]))
705 tr_notice("tr_tids_req_handler: unable to get mutex for AAA thread %d.", ii);
707 aaa_cookie[ii]->mq=NULL; /* threads will not try to respond through a null mq */
709 if (0!=tr_tids_fwd_release_mutex(aaa_cookie[ii]))
710 tr_notice("tr_tids_req_handler: unable to release mutex for AAA thread %d.", ii);
714 /* Now all threads have either replied (and aaa_cookie[ii] is null) or have been told not to
715 * reply (by setting their mq pointer to null). However, some may have responded by placing
716 * a message on the mq after we last checked but before we set their mq pointer to null. These
717 * will not know that we gave up on them, so we must free their cookies for them. We can just
718 * go through any remaining messages on the mq to identify these threads. By putting them in
719 * our context instead of freeing them directly, we ensure we don't accidentally invalidate
720 * any of our own pointers into the structure before this function exits. */
721 while (NULL!=(msg=tr_mq_pop(mq, NULL))) {
722 payload=(TR_RESP_COOKIE *)tr_mq_msg_get_payload(msg);
723 if (aaa_cookie[payload->thread_id]!=NULL)
724 talloc_steal(tmp_ctx, aaa_cookie[payload->thread_id]);
729 if (n_responses==0) {
730 /* No requests succeeded, so this will be an error */
733 /* If we got any error responses, send an arbitrarily chosen one. */
734 for (ii=0; ii<n_aaa; ii++) {
735 if (aaa_resp[ii] != NULL) {
736 tid_resp_cpy(resp, aaa_resp[ii]);
740 /* No error responses at all, so generate our own error. */
741 tid_resp_set_err_msg(resp, tr_new_name("Unable to contact AAA server(s)."));
749 talloc_free(tmp_ctx);
753 static int tr_tids_gss_handler(gss_name_t client_name, TR_NAME *gss_name,
756 struct tr_tids_event_cookie *cookie=talloc_get_type_abort(data, struct tr_tids_event_cookie);
757 TIDS_INSTANCE *tids = cookie->tids;
758 TR_CFG_MGR *cfg_mgr = cookie->cfg_mgr;
760 if ((!client_name) || (!gss_name) || (!tids) || (!cfg_mgr)) {
761 tr_debug("tr_tidc_gss_handler: Bad parameters.");
765 /* Ensure at least one client exists using this GSS name */
766 if (NULL == tr_rp_client_lookup(cfg_mgr->active->rp_clients, gss_name)) {
767 tr_debug("tr_tids_gss_handler: Unknown GSS name %.*s", gss_name->len, gss_name->buf);
771 /* Store the GSS name */
772 tids->gss_name = tr_dup_name(gss_name);
773 tr_debug("Client's GSS Name: %.*s", gss_name->len, gss_name->buf);
779 /***** TIDS event handling *****/
781 /* called when a connection to the TIDS port is received */
782 static void tr_tids_event_cb(int listener, short event, void *arg)
784 TIDS_INSTANCE *tids = talloc_get_type_abort(arg, TIDS_INSTANCE);
786 if (0==(event & EV_READ))
787 tr_debug("tr_tids_event_cb: unexpected event on TIDS socket (event=0x%X)", event);
789 tids_accept(tids, listener);
792 /* called when it's time to sweep for completed TID child processes */
793 static void tr_tids_sweep_cb(int listener, short event, void *arg)
795 TIDS_INSTANCE *tids = talloc_get_type_abort(arg, TIDS_INSTANCE);
797 if (0==(event & EV_TIMEOUT))
798 tr_debug("tr_tids_event_cb: unexpected event on TID process sweep timer (event=0x%X)", event);
800 tids_sweep_procs(tids);
803 /* Configure the tids instance and set up its event handlers.
804 * Returns 0 on success, nonzero on failure. Fills in
805 * *tids_event (which should be allocated by caller). */
806 int tr_tids_event_init(struct event_base *base, TIDS_INSTANCE *tids, TR_CFG_MGR *cfg_mgr, TRPS_INSTANCE *trps,
807 struct tr_socket_event *tids_ev, struct event **sweep_ev)
809 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
810 struct tr_tids_event_cookie *cookie=NULL;
811 struct timeval sweep_interval;
815 if (tids_ev == NULL) {
816 tr_debug("tr_tids_event_init: Null tids_ev.");
821 if (sweep_ev == NULL) {
822 tr_debug("tr_tids_event_init: Null sweep_ev.");
827 /* Create the cookie for callbacks. We'll put it in the tids context, so it will
828 * be cleaned up when tids is freed by talloc_free. */
829 cookie=talloc(tmp_ctx, struct tr_tids_event_cookie);
830 if (cookie == NULL) {
831 tr_debug("tr_tids_event_init: Unable to allocate cookie.");
836 cookie->cfg_mgr=cfg_mgr;
838 talloc_steal(tids, cookie);
840 /* get a tids listener */
841 tids_ev->n_sock_fd = (int)tids_get_listener(tids,
844 cfg_mgr->active->internal->hostname,
845 cfg_mgr->active->internal->tids_port,
849 if (tids_ev->n_sock_fd==0) {
850 tr_crit("Error opening TID server socket.");
855 /* Set up listener events */
856 for (ii=0; ii<tids_ev->n_sock_fd; ii++) {
857 tids_ev->ev[ii]=event_new(base,
858 tids_ev->sock_fd[ii],
862 event_add(tids_ev->ev[ii], NULL);
865 /* Set up a periodic check for completed TID handler processes */
866 *sweep_ev = event_new(base, -1, EV_TIMEOUT|EV_PERSIST, tr_tids_sweep_cb, tids);
867 sweep_interval.tv_sec = 10;
868 sweep_interval.tv_usec = 0;
869 event_add(*sweep_ev, &sweep_interval);
872 talloc_free(tmp_ctx);