1 /* Copyright 2010,2011,2013 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>
23 conn_close (struct rs_connection **connp)
28 if ((*connp)->state == RS_CONN_STATE_CONNECTED)
29 r = rs_conn_disconnect (*connp);
36 conn_user_dispatch_p (const struct rs_connection *conn)
40 return (conn->callbacks.connected_cb ||
41 conn->callbacks.disconnected_cb ||
42 conn->callbacks.received_cb ||
43 conn->callbacks.sent_cb);
48 conn_activate_timeout (struct rs_connection *conn)
52 assert (conn->base_.ctx->evb);
53 if (conn->base_.timeout.tv_sec || conn->base_.timeout.tv_usec)
55 rs_debug (("%s: activating timer: %d.%d\n", __func__,
56 conn->base_.timeout.tv_sec, conn->base_.timeout.tv_usec));
57 if (evtimer_add (conn->tev, &conn->base_.timeout))
58 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
59 "evtimer_add: %d", errno);
65 conn_type_tls (const struct rs_connection *conn)
67 assert (conn->base_.active_peer);
68 return conn->base_.realm->type == RS_CONN_TYPE_TLS
69 || conn->base_.realm->type == RS_CONN_TYPE_DTLS;
73 conn_cred_psk (const struct rs_connection *conn)
75 assert (conn->base_.active_peer);
76 return conn->base_.active_peer->transport_cred &&
77 conn->base_.active_peer->transport_cred->type == RS_CRED_TLS_PSK;
81 conn_init (struct rs_context *ctx,
82 struct rs_conn_base *connbase,
83 enum rs_conn_subtype type)
87 case RS_CONN_OBJTYPE_BASE:
88 connbase->magic = RS_CONN_MAGIC_BASE;
90 case RS_CONN_OBJTYPE_GENERIC:
91 connbase->magic = RS_CONN_MAGIC_GENERIC;
93 case RS_CONN_OBJTYPE_LISTENER:
94 connbase->magic = RS_CONN_MAGIC_LISTENER;
97 assert ("invalid connection subtype" == NULL);
105 conn_configure (struct rs_context *ctx,
106 struct rs_conn_base *connbase,
111 struct rs_realm *r = rs_conf_find_realm (ctx, config);
115 connbase->peers = r->peers; /* FIXME: Copy instead? */
117 for (p = connbase->peers; p != NULL; p = p->next)
118 p->connbase = connbase;
120 connbase->timeout.tv_sec = r->timeout;
121 connbase->tryagain = r->retries;
124 if (connbase->realm == NULL)
126 connbase->realm = rs_calloc (ctx, 1, sizeof (struct rs_realm));
127 if (connbase->realm == NULL)
128 return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL);
133 /* Public functions. */
135 rs_conn_create (struct rs_context *ctx,
136 struct rs_connection **conn,
140 struct rs_connection *c = NULL;
143 c = rs_calloc (ctx, 1, sizeof (struct rs_connection));
145 return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL);
146 conn_init (ctx, &c->base_, RS_CONN_OBJTYPE_GENERIC);
147 err = conn_configure (ctx, &c->base_, config);
162 rs_conn_set_type (struct rs_connection *conn, rs_conn_type_t type)
165 assert (conn->base_.realm);
166 conn->base_.realm->type = type;
170 rs_conn_add_listener (struct rs_connection *conn,
172 const char *hostname,
175 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
180 rs_conn_disconnect (struct rs_connection *conn)
186 err = evutil_closesocket (conn->base_.fd);
192 rs_conn_destroy (struct rs_connection *conn)
198 /* NOTE: conn->realm is owned by context. */
199 /* NOTE: conn->peers is owned by context. */
201 if (conn->state == RS_CONN_STATE_CONNECTED)
202 err = rs_conn_disconnect (conn);
204 #if defined (RS_ENABLE_TLS)
205 if (conn->tls_ssl) /* FIXME: Free SSL strucxt in rs_conn_disconnect? */
206 SSL_free (conn->tls_ssl);
208 SSL_CTX_free (conn->tls_ctx);
212 event_free (conn->tev);
214 bufferevent_free (conn->base_.bev);
216 event_free (conn->base_.rev);
218 event_free (conn->base_.wev);
220 rs_free (conn->base_.ctx, conn);
226 rs_conn_set_eventbase (struct rs_connection *conn, struct event_base *eb)
228 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
232 rs_conn_set_callbacks (struct rs_connection *conn, struct rs_conn_callbacks *cb)
235 memcpy (&conn->callbacks, cb, sizeof (conn->callbacks));
239 rs_conn_del_callbacks (struct rs_connection *conn)
242 memset (&conn->callbacks, 0, sizeof (conn->callbacks));
245 struct rs_conn_callbacks *
246 rs_conn_get_callbacks(struct rs_connection *conn)
249 return &conn->callbacks;
253 rs_conn_select_peer (struct rs_connection *conn, const char *name)
255 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
259 rs_conn_get_current_peer (struct rs_connection *conn,
263 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
267 rs_conn_dispatch (struct rs_connection *conn)
270 return event_base_loop (conn->base_.ctx->evb, EVLOOP_ONCE);
275 *rs_conn_get_evb (const struct rs_connection *conn)
282 int rs_conn_get_fd (struct rs_connection *conn)
285 assert (conn->base_.active_peer);
286 return conn->base_.fd;
290 _rcb (struct rs_message *message, void *user_data)
292 struct rs_message *msg = (struct rs_message *) user_data;
296 msg->flags |= RS_MESSAGE_RECEIVED;
297 if (msg->conn->base_.bev)
298 bufferevent_disable (msg->conn->base_.bev, EV_WRITE|EV_READ);
300 event_del (msg->conn->base_.rev);
304 rs_conn_receive_message (struct rs_connection *conn,
305 struct rs_message *req_msg,
306 struct rs_message **msg_out)
309 struct rs_message *msg = NULL;
312 assert (conn->base_.realm);
313 assert (!conn_user_dispatch_p (conn)); /* Blocking mode only. */
315 if (rs_message_create (conn, &msg))
318 assert (conn->base_.ctx->evb);
319 assert (conn->base_.fd >= 0);
321 conn->callbacks.received_cb = _rcb;
322 conn->base_.user_data = msg;
323 msg->flags &= ~RS_MESSAGE_RECEIVED;
325 if (conn->base_.bev) /* TCP. */
327 bufferevent_setwatermark (conn->base_.bev, EV_READ, RS_HEADER_LEN, 0);
328 bufferevent_setcb (conn->base_.bev, tcp_read_cb, NULL, tcp_event_cb, msg);
329 bufferevent_enable (conn->base_.bev, EV_READ);
333 /* Put fresh message in user_data for the callback and enable the
335 event_assign (conn->base_.rev, conn->base_.ctx->evb,
336 event_get_fd (conn->base_.rev), EV_READ,
337 event_get_callback (conn->base_.rev), msg);
338 err = event_add (conn->base_.rev, NULL);
340 return rs_err_conn_push_fl (msg->conn, RSE_EVENT, __FILE__, __LINE__,
342 evutil_gai_strerror (err));
344 /* Activate retransmission timer. */
345 conn_activate_timeout (msg->conn);
348 rs_debug (("%s: entering event loop\n", __func__));
349 err = event_base_dispatch (conn->base_.ctx->evb);
350 conn->callbacks.received_cb = NULL;
352 return rs_err_conn_push_fl (msg->conn, RSE_EVENT, __FILE__, __LINE__,
353 "event_base_dispatch: %s",
354 evutil_gai_strerror (err));
355 rs_debug (("%s: event loop done\n", __func__));
357 if ((msg->flags & RS_MESSAGE_RECEIVED) == 0
359 && message_verify_response (msg->conn, msg, req_msg) != RSE_OK))
361 if (rs_err_conn_peek_code (msg->conn) == RSE_OK)
362 /* No message and no error on the stack _should_ mean that the
363 server hung up on us. */
364 rs_err_conn_push (msg->conn, RSE_DISCO, "no response");
365 return rs_err_conn_peek_code (conn);
374 rs_conn_set_timeout(struct rs_connection *conn, struct timeval *tv)
378 conn->base_.timeout = *tv;