1 /* Copyright 2010-2013 NORDUnet A/S. All rights reserved.
2 See LICENSE for licensing information. */
4 #if defined HAVE_CONFIG_H
12 #include <event2/event.h>
13 #include <event2/bufferevent.h>
14 #include <radsec/radsec.h>
15 #include <radsec/radsec-impl.h>
24 conn_user_dispatch_p (const struct rs_connection *conn)
28 return (conn->callbacks.connected_cb ||
29 conn->callbacks.disconnected_cb ||
30 conn->callbacks.received_cb ||
31 conn->callbacks.sent_cb);
35 conn_activate_timeout (struct rs_connection *conn)
37 const struct rs_conn_base *connbase;
39 connbase = TO_BASE_CONN (conn);
40 assert (connbase->ctx);
41 assert (connbase->ctx->evb);
43 if (connbase->timeout.tv_sec || connbase->timeout.tv_usec)
45 rs_debug (("%s: activating timer: %d.%d\n", __func__,
46 connbase->timeout.tv_sec, connbase->timeout.tv_usec));
47 if (evtimer_add (conn->tev, &connbase->timeout))
48 return rs_err_conn_push (conn, RSE_EVENT, "evtimer_add: %d", errno);
54 conn_type_tls_p (const struct rs_connection *conn)
56 return TO_BASE_CONN(conn)->transport == RS_CONN_TYPE_TLS
57 || TO_BASE_CONN(conn)->transport == RS_CONN_TYPE_DTLS;
61 baseconn_type_datagram_p (const struct rs_conn_base *connbase)
63 return connbase->transport == RS_CONN_TYPE_UDP
64 || connbase->transport == RS_CONN_TYPE_DTLS;
68 baseconn_type_stream_p (const struct rs_conn_base *connbase)
70 return connbase->transport == RS_CONN_TYPE_TCP
71 || connbase->transport == RS_CONN_TYPE_TLS;
75 conn_cred_psk (const struct rs_connection *conn)
78 return conn->active_peer != NULL
79 && conn->active_peer->transport_cred
80 && conn->active_peer->transport_cred->type == RS_CRED_TLS_PSK;
84 conn_init (struct rs_context *ctx, /* FIXME: rename connbase_init? */
85 struct rs_conn_base *connbase,
86 enum rs_conn_subtype type)
90 case RS_CONN_OBJTYPE_BASE:
91 connbase->magic = RS_CONN_MAGIC_BASE;
93 case RS_CONN_OBJTYPE_GENERIC:
94 connbase->magic = RS_CONN_MAGIC_GENERIC;
96 case RS_CONN_OBJTYPE_LISTENER:
97 connbase->magic = RS_CONN_MAGIC_LISTENER;
100 assert ("invalid connection subtype" == NULL);
108 conn_configure (struct rs_context *ctx, /* FIXME: rename conbbase_configure? */
109 struct rs_conn_base *connbase,
114 struct rs_realm *r = rs_conf_find_realm (ctx, config);
118 connbase->peers = r->peers; /* FIXME: Copy instead? */
120 for (p = connbase->peers; p != NULL; p = p->next)
121 p->connbase = connbase;
123 connbase->timeout.tv_sec = r->timeout;
124 connbase->tryagain = r->retries;
127 #if 0 /* incoming connections don't have a realm (a config object), update: they do, but "somebody else" is setting this up <-- FIXME */
128 if (connbase->realm == NULL)
130 struct rs_realm *r = rs_calloc (ctx, 1, sizeof (struct rs_realm));
132 return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL);
133 r->next = ctx->realms;
134 ctx->realms = connbase->realm = r;
138 connbase->transport = connbase->realm->type;
145 conn_add_read_event (struct rs_connection *conn, void *user_data)
147 struct rs_conn_base *connbase = TO_BASE_CONN(conn);
152 if (connbase->bev) /* TCP (including TLS). */
154 bufferevent_setwatermark (connbase->bev, EV_READ, RS_HEADER_LEN, 0);
155 bufferevent_setcb (connbase->bev, tcp_read_cb, NULL, tcp_event_cb,
157 bufferevent_enable (connbase->bev, EV_READ);
161 /* Put fresh message in user_data for the callback and enable the
163 event_assign (connbase->rev, connbase->ctx->evb,
164 event_get_fd (connbase->rev), EV_READ,
165 event_get_callback (connbase->rev),
167 err = event_add (connbase->rev, NULL);
169 return rs_err_connbase_push_fl (connbase, RSE_EVENT, __FILE__, __LINE__,
171 evutil_gai_strerror (err));
173 /* Activate retransmission timer. */
174 conn_activate_timeout (conn);
180 /** Return !=0 if \a conn is an originating connection, i.e. if its
183 conn_originating_p (const struct rs_connection *conn)
185 return conn->active_peer->type == RS_PEER_TYPE_SERVER;
189 baseconn_close (struct rs_conn_base *connbase)
194 rs_debug (("%s: closing fd %d\n", __func__, connbase->fd));
196 err = evutil_closesocket (connbase->fd);
198 err = rs_err_connbase_push (connbase, RSE_EVENT,
199 "evutil_closesocket: %d (%s)",
200 errno, strerror (errno));
205 /* Public functions. */
207 rs_conn_create (struct rs_context *ctx,
208 struct rs_connection **conn,
212 struct rs_connection *c = NULL;
215 c = rs_calloc (ctx, 1, sizeof (struct rs_connection));
217 return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL);
218 conn_init (ctx, &c->base_, RS_CONN_OBJTYPE_GENERIC);
219 err = conn_configure (ctx, &c->base_, config);
234 rs_conn_set_type (struct rs_connection *conn, rs_conn_type_t type)
237 assert (conn->base_.realm);
238 conn->base_.realm->type = type;
242 rs_conn_add_listener (struct rs_connection *conn,
244 const char *hostname,
247 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
252 rs_conn_disconnect (struct rs_connection *conn)
258 if (conn->state == RS_CONN_STATE_CONNECTED)
259 event_on_disconnect (conn);
261 if (TO_BASE_CONN (conn)->bev)
263 bufferevent_free (TO_BASE_CONN (conn)->bev);
264 TO_BASE_CONN (conn)->bev = NULL;
266 if (TO_BASE_CONN (conn)->rev)
268 event_free (TO_BASE_CONN (conn)->rev);
269 TO_BASE_CONN (conn)->rev = NULL;
271 if (TO_BASE_CONN (conn)->wev)
273 event_free (TO_BASE_CONN (conn)->wev);
274 TO_BASE_CONN (conn)->wev = NULL;
277 err = evutil_closesocket (TO_BASE_CONN (conn)->fd);
278 TO_BASE_CONN (conn)->fd = -1;
283 rs_conn_destroy (struct rs_connection *conn)
289 /* NOTE: conn->realm is owned by context. */
290 /* NOTE: conn->peers is owned by context. */
292 if (conn->state == RS_CONN_STATE_CONNECTED)
293 err = rs_conn_disconnect (conn);
295 #if defined (RS_ENABLE_TLS)
296 if (conn->tls_ssl) /* FIXME: Free SSL strucxt in rs_conn_disconnect? */
297 SSL_free (conn->tls_ssl);
299 SSL_CTX_free (conn->tls_ctx);
303 event_free (conn->tev);
305 bufferevent_free (conn->base_.bev);
307 event_free (conn->base_.rev);
309 event_free (conn->base_.wev);
311 rs_free (conn->base_.ctx, conn);
317 rs_conn_set_eventbase (struct rs_connection *conn, struct event_base *eb)
319 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
323 rs_conn_set_callbacks (struct rs_connection *conn,
324 struct rs_conn_callbacks *cb,
328 TO_BASE_CONN(conn)->user_data = user_data;
329 memcpy (&conn->callbacks, cb, sizeof (conn->callbacks));
333 rs_conn_del_callbacks (struct rs_connection *conn)
336 memset (&conn->callbacks, 0, sizeof (conn->callbacks));
339 struct rs_conn_callbacks *
340 rs_conn_get_callbacks (struct rs_connection *conn)
343 return &conn->callbacks;
347 rs_conn_select_peer (struct rs_connection *conn, const char *name)
349 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
353 rs_conn_get_current_peer (struct rs_connection *conn,
357 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
361 rs_conn_dispatch (struct rs_connection *conn)
364 return event_base_loop (conn->base_.ctx->evb, EVLOOP_ONCE);
369 *rs_conn_get_evb (const struct rs_connection *conn)
376 int rs_conn_get_fd (struct rs_connection *conn)
379 return conn->base_.fd;
383 _rcb (struct rs_message *message, void *user_data)
385 struct rs_message *msg = (struct rs_message *) user_data;
389 msg->flags |= RS_MESSAGE_RECEIVED;
390 if (msg->conn->base_.bev) /* TCP -- disable bufferevent. */
391 bufferevent_disable (msg->conn->base_.bev, EV_WRITE|EV_READ);
392 else /* UDP -- remove read event. */
393 event_del (msg->conn->base_.rev);
397 rs_conn_receive_message (struct rs_connection *conn,
398 struct rs_message *req_msg,
399 struct rs_message **msg_out)
402 struct rs_message *msg = NULL;
405 assert (conn->base_.realm);
406 assert (!conn_user_dispatch_p (conn)); /* Blocking mode only. */
408 if (rs_message_create (conn, &msg))
411 assert (conn->base_.ctx->evb);
412 assert (conn->base_.fd >= 0);
414 conn->callbacks.received_cb = _rcb;
415 conn->base_.user_data = msg;
416 msg->flags &= ~RS_MESSAGE_RECEIVED;
418 err = conn_add_read_event (conn, msg);
422 rs_debug (("%s: entering event loop\n", __func__));
423 err = event_base_dispatch (conn->base_.ctx->evb);
424 conn->callbacks.received_cb = NULL;
426 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
427 "event_base_dispatch: %s",
428 evutil_gai_strerror (err));
429 rs_debug (("%s: event loop done\n", __func__));
431 if ((msg->flags & RS_MESSAGE_RECEIVED) == 0 /* No message. */
433 && message_verify_response (conn, msg, req_msg) != RSE_OK))
435 if (rs_err_conn_peek_code (conn) == RSE_OK)
437 /* No message and no error on the stack _should_ mean that the
438 server hung up on us. */
439 rs_err_conn_push (conn, RSE_DISCO, "no response");
441 return rs_err_conn_peek_code (conn);
450 rs_conn_set_timeout(struct rs_connection *conn, struct timeval *tv)
454 conn->base_.timeout = *tv;
458 connbase_get_peers (const struct rs_conn_base *connbase)
461 return connbase->peers;