3 #include <event2/event.h>
11 #include <trp_internal.h>
12 #include <tr_config.h>
18 /* hold a trps instance and a config manager */
19 struct tr_trps_event_cookie {
24 /* callback to schedule event to process messages */
25 static void tr_trps_mq_cb(TR_MQ *mq, void *arg)
27 struct event *mq_ev=(struct event *)arg;
28 event_active(mq_ev, 0, 0);
31 static void msg_free_helper(void *p)
33 tr_msg_free_decoded((TR_MSG *)p);
35 /* takes a TR_MSG and puts it in a TR_MQ_MSG for processing by the main thread */
36 static TRP_RC tr_trps_msg_handler(TRPS_INSTANCE *trps,
40 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
41 TR_MQ_MSG *mq_msg=NULL;
43 /* n.b., conn is available here, but do not hold onto the reference
44 * because it may be cleaned up if the originating connection goes
45 * down before the message is processed */
46 mq_msg=tr_mq_msg_new(tmp_ctx, "tr_msg");
50 tr_mq_msg_set_payload(mq_msg, (void *)tr_msg, msg_free_helper);
51 trps_mq_append(trps, mq_msg);
52 talloc_free(tmp_ctx); /* cleans up the message if it did not get appended correctly */
57 static int tr_trps_gss_handler(gss_name_t client_name, gss_buffer_t gss_name,
61 struct tr_trps_event_cookie *cookie=(struct tr_trps_event_cookie *)cookie_in;
62 TRPS_INSTANCE *trps = cookie->trps;
63 TR_CFG_MGR *cfg_mgr = cookie->cfg_mgr;
64 TR_NAME name={gss_name->value, gss_name->length};
66 tr_debug("tr_trps_gss_handler()");
68 if ((!client_name) || (!gss_name) || (!trps) || (!cfg_mgr)) {
69 tr_debug("tr_trps_gss_handler: Bad parameters.");
73 /* look up the RP client matching the GSS name */
74 if ((NULL == (rp = tr_rp_client_lookup(cfg_mgr->active->rp_clients, &name)))) {
75 tr_debug("tr_trps_gss_handler: Unknown GSS name %.*s", name.len, name.buf);
79 /*trps->rp_gss = rp;*/
80 tr_debug("Client's GSS Name: %.*s", name.len, name.buf);
85 /* data passed to thread */
86 struct trps_thread_data {
90 /* thread to handle GSS connections to peers */
91 static void *tr_trps_thread(void *arg)
93 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
94 struct trps_thread_data *thread_data=talloc_get_type_abort(arg, struct trps_thread_data);
95 TRP_CONNECTION *conn=thread_data->conn;
96 TRPS_INSTANCE *trps=thread_data->trps;
99 tr_debug("tr_trps_thread: started");
100 trps_handle_connection(trps, conn);
102 msg=tr_mq_msg_new(tmp_ctx, "trps_thread_exit");
103 tr_mq_msg_set_payload(msg, (void *)conn, NULL); /* do not pass a free routine */
105 tr_err("tr_trps_thread: error allocating TR_MQ_MSG");
107 trps_mq_append(trps, msg);
109 tr_debug("tr_trps_thread: exit");
110 talloc_free(tmp_ctx);
114 /* called when a connection to the TRPS port is received */
115 static void tr_trps_event_cb(int listener, short event, void *arg)
117 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
118 TRPS_INSTANCE *trps = talloc_get_type_abort(arg, TRPS_INSTANCE); /* aborts on wrong type */
119 TRP_CONNECTION *conn=NULL;
120 TR_NAME *gssname=NULL;
122 struct trps_thread_data *thread_data=NULL;
124 if (0==(event & EV_READ)) {
125 tr_debug("tr_trps_event_cb: unexpected event on TRPS socket (event=0x%X)", event);
127 /* create a thread to handle this connection */
128 asprintf(&name, "trustrouter@%s", trps->hostname);
129 gssname=tr_new_name(name);
130 free(name); name=NULL;
131 conn=trp_connection_accept(tmp_ctx, listener, gssname);
133 /* need to monitor this fd and trigger events when read becomes possible */
134 thread_data=talloc(conn, struct trps_thread_data);
135 if (thread_data==NULL) {
136 tr_err("tr_trps_event_cb: unable to allocate trps_thread_data");
137 talloc_free(tmp_ctx);
140 thread_data->conn=conn;
141 thread_data->trps=trps;
142 pthread_create(trp_connection_get_thread(conn), NULL, tr_trps_thread, thread_data);
143 pthread_detach(*(trp_connection_get_thread(conn))); /* we will not rejoin the thread */
144 trps_add_connection(trps, conn); /* remember the connection */
147 talloc_free(tmp_ctx);
150 static void tr_trps_cleanup_thread(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
152 /* everything belonging to the thread is in the TRP_CONNECTION
153 * associated with it */
154 trps_remove_connection(trps, conn);
155 tr_debug("Deleted connection");
158 static void tr_trps_process_mq(int socket, short event, void *arg)
160 TRPS_INSTANCE *trps=talloc_get_type_abort(arg, TRPS_INSTANCE);
165 msg=trps_mq_pop(trps);
167 s=tr_mq_msg_get_message(msg);
168 if (0==strcmp(s, "trps_thread_exit")) {
169 tr_trps_cleanup_thread(trps,
170 talloc_get_type_abort(tr_mq_msg_get_payload(msg),
173 else if (0==strcmp(s, "tr_msg")) {
174 trps_handle_tr_msg(trps, msg);
177 tr_notice("tr_trps_process_mq: unknown message '%s' received.", tr_mq_msg_get_message(msg));
180 msg=trps_mq_pop(trps);
184 static int tr_trps_events_destructor(void *obj)
186 TR_TRPS_EVENTS *ev=talloc_get_type_abort(obj, TR_TRPS_EVENTS);
188 event_free(ev->mq_ev);
191 TR_TRPS_EVENTS *tr_trps_events_new(TALLOC_CTX *mem_ctx)
193 TR_TRPS_EVENTS *ev=talloc(mem_ctx, TR_TRPS_EVENTS);
195 ev->listen_ev=talloc(ev, struct tr_socket_event);
197 if (ev->listen_ev==NULL) {
201 talloc_set_destructor((void *)ev, tr_trps_events_destructor);
206 /* Configure the trps instance and set up its event handler.
207 * Fills in trps_ev, which should be allocated by caller. */
208 TRP_RC tr_trps_event_init(struct event_base *base,
211 TR_TRPS_EVENTS *trps_ev)
213 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
214 struct tr_socket_event *listen_ev=NULL;
215 struct tr_trps_event_cookie *cookie;
216 TRP_RC retval=TRP_ERROR;
218 if (trps_ev == NULL) {
219 tr_debug("tr_trps_event_init: Null trps_ev.");
224 /* get convenient handles */
225 listen_ev=trps_ev->listen_ev;
227 /* Create the cookie for callbacks. It is part of the trps context, so it will
228 * be cleaned up when trps is freed by talloc_free. */
229 cookie=talloc(tmp_ctx, struct tr_trps_event_cookie);
230 if (cookie == NULL) {
231 tr_debug("tr_trps_event_init: Unable to allocate cookie.");
236 cookie->cfg_mgr=cfg_mgr;
237 talloc_steal(trps, cookie);
239 /* get a trps listener */
240 listen_ev->sock_fd=trps_get_listener(trps,
243 cfg_mgr->active->internal->hostname,
244 cfg_mgr->active->internal->trps_port,
246 if (listen_ev->sock_fd < 0) {
247 tr_crit("Error opening TRP server socket.");
253 listen_ev->ev=event_new(base,
258 event_add(listen_ev->ev, NULL);
260 /* now set up message queue processing event, only triggered by
262 trps_ev->mq_ev=event_new(base,
267 tr_mq_set_notify_cb(trps->mq, tr_trps_mq_cb, trps_ev->mq_ev);
272 talloc_free(tmp_ctx);
277 struct trpc_notify_cb_data {
280 pthread_mutex_t mutex;
283 static void tr_trpc_mq_cb(TR_MQ *mq, void *arg)
285 struct trpc_notify_cb_data *cb_data=(struct trpc_notify_cb_data *) arg;
286 pthread_mutex_lock(&(cb_data->mutex));
287 if (!cb_data->msg_ready) {
288 cb_data->msg_ready=1;
289 pthread_cond_signal(&(cb_data->cond));
291 pthread_mutex_unlock(&(cb_data->mutex));
294 /* data passed to thread */
295 struct trpc_thread_data {
299 static void *tr_trpc_thread(void *arg)
301 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
302 struct trpc_thread_data *thread_data=talloc_get_type_abort(arg, struct trpc_thread_data);
303 TRPC_INSTANCE *trpc=thread_data->trpc;
304 TRPS_INSTANCE *trps=thread_data->trps;
307 const char *msg_type=NULL;
308 char *encoded_msg=NULL;
310 struct trpc_notify_cb_data cb_data={0,
311 PTHREAD_COND_INITIALIZER,
312 PTHREAD_MUTEX_INITIALIZER};
314 tr_debug("tr_trpc_thread: started");
316 /* set up the mq for receiving */
317 pthread_mutex_lock(&(cb_data.mutex)); /* hold this lock until we enter the main loop */
319 tr_mq_lock(trpc->mq);
320 tr_mq_set_notify_cb(trpc->mq, tr_trpc_mq_cb, (void *) &cb_data);
321 tr_mq_unlock(trpc->mq);
323 rc=trpc_connect(trpc);
324 if (rc!=TRP_SUCCESS) {
325 tr_notice("tr_trpc_thread: failed to initiate connection to %s:%d.",
326 trpc_get_server(trpc),
327 trpc_get_port(trpc));
331 pthread_cond_wait(&(cb_data.cond), &(cb_data.mutex));
332 /* verify the condition */
333 if (cb_data.msg_ready) {
334 msg=trpc_mq_pop(trpc);
336 /* no message in the queue */
337 tr_err("tr_trpc_thread: notified of msg, but queue empty");
341 msg_type=tr_mq_msg_get_message(msg);
343 if (0==strcmp(msg_type, "trpc_abort")) {
345 break; /* exit loop */
347 else if (0==strcmp(msg_type, "trpc_send")) {
348 encoded_msg=tr_mq_msg_get_payload(msg);
349 if (encoded_msg==NULL)
350 tr_notice("tr_trpc_thread: null outgoing TRP message.");
352 rc = trpc_send_msg(trpc, encoded_msg);
353 if (rc!=TRP_SUCCESS) {
354 tr_notice("tr_trpc_thread: trpc_send_msg failed.");
361 tr_notice("tr_trpc_thread: unknown message '%s' received.", msg_type);
368 msg=tr_mq_msg_new(tmp_ctx, "trpc_thread_exit");
369 tr_mq_msg_set_payload(msg, (void *)trpc, NULL); /* do not pass a free routine */
371 tr_err("tr_trpc_thread: error allocating TR_MQ_MSG");
373 trps_mq_append(trps, msg);
375 talloc_free(tmp_ctx);
379 /* starts a trpc thread to connect to server:port */
380 TRPC_INSTANCE *tr_trpc_initiate(TRPS_INSTANCE *trps, const char *server, unsigned int port)
382 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
383 TRPC_INSTANCE *trpc=NULL;
384 TRP_CONNECTION *conn=NULL;
385 struct trpc_thread_data *thread_data=NULL;
387 tr_debug("tr_trpc_initiate entered");
388 trpc=trpc_new(tmp_ctx);
390 tr_crit("tr_trpc_initiate: could not allocate TRPC_INSTANCE.");
393 tr_debug("tr_trpc_initiate: allocated trpc");
395 conn=trp_connection_new(trpc);
397 tr_crit("tr_trpc_initiate: could not allocate TRP_CONNECTION.");
400 trpc_set_conn(trpc, conn);
401 trpc_set_server(trpc, talloc_strdup(trpc, server));
402 trpc_set_port(trpc, port);
403 tr_debug("tr_trpc_initiate: allocated connection");
406 thread_data=talloc(trpc, struct trpc_thread_data);
407 if (thread_data==NULL) {
408 tr_crit("tr_trpc_initiate: could not allocate struct trpc_thread_data.");
411 thread_data->trpc=trpc;
412 thread_data->trps=trps;
414 pthread_create(trp_connection_get_thread(conn), NULL, tr_trpc_thread, thread_data);
415 pthread_detach(*(trp_connection_get_thread(conn))); /* we will not rejoin the thread */
417 tr_debug("tr_trpc_initiate: started trpc thread");
418 trps_add_trpc(trps, trpc);
420 talloc_report_full(trps, stderr);
421 talloc_report_full(tmp_ctx, stderr);
424 talloc_free(tmp_ctx);