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>
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)
39 assert (conn->base_.ctx->evb);
40 if (conn->base_.timeout.tv_sec || conn->base_.timeout.tv_usec)
42 rs_debug (("%s: activating timer: %d.%d\n", __func__,
43 conn->base_.timeout.tv_sec, conn->base_.timeout.tv_usec));
44 if (evtimer_add (conn->tev, &conn->base_.timeout))
45 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
46 "evtimer_add: %d", errno);
52 conn_type_tls_p (const struct rs_connection *conn)
54 return TO_BASE_CONN(conn)->transport == RS_CONN_TYPE_TLS
55 || TO_BASE_CONN(conn)->transport == RS_CONN_TYPE_DTLS;
59 baseconn_type_datagram_p (const struct rs_conn_base *connbase)
61 return connbase->transport == RS_CONN_TYPE_UDP
62 || connbase->transport == RS_CONN_TYPE_DTLS;
66 baseconn_type_stream_p (const struct rs_conn_base *connbase)
68 return connbase->transport == RS_CONN_TYPE_TCP
69 || connbase->transport == RS_CONN_TYPE_TLS;
73 conn_cred_psk (const struct rs_connection *conn)
76 assert (conn->active_peer);
77 return conn->active_peer->transport_cred &&
78 conn->active_peer->transport_cred->type == RS_CRED_TLS_PSK;
82 conn_init (struct rs_context *ctx, /* FIXME: rename connbase_init? */
83 struct rs_conn_base *connbase,
84 enum rs_conn_subtype type)
88 case RS_CONN_OBJTYPE_BASE:
89 connbase->magic = RS_CONN_MAGIC_BASE;
91 case RS_CONN_OBJTYPE_GENERIC:
92 connbase->magic = RS_CONN_MAGIC_GENERIC;
94 case RS_CONN_OBJTYPE_LISTENER:
95 connbase->magic = RS_CONN_MAGIC_LISTENER;
98 assert ("invalid connection subtype" == NULL);
106 conn_configure (struct rs_context *ctx, /* FIXME: rename conbbase_configure? */
107 struct rs_conn_base *connbase,
112 struct rs_realm *r = rs_conf_find_realm (ctx, config);
116 connbase->peers = r->peers; /* FIXME: Copy instead? */
118 for (p = connbase->peers; p != NULL; p = p->next)
119 p->connbase = connbase;
121 connbase->timeout.tv_sec = r->timeout;
122 connbase->tryagain = r->retries;
125 #if 0 /* incoming connections don't have a realm (a config object), update: they do, but "somebody else" is setting this up <-- FIXME */
126 if (connbase->realm == NULL)
128 struct rs_realm *r = rs_calloc (ctx, 1, sizeof (struct rs_realm));
130 return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL);
131 r->next = ctx->realms;
132 ctx->realms = connbase->realm = r;
136 connbase->transport = connbase->realm->type;
143 conn_add_read_event (struct rs_connection *conn, void *user_data)
145 struct rs_conn_base *connbase = TO_BASE_CONN(conn);
150 if (connbase->bev) /* TCP (including TLS). */
152 bufferevent_setwatermark (connbase->bev, EV_READ, RS_HEADER_LEN, 0);
153 bufferevent_setcb (connbase->bev, tcp_read_cb, NULL, tcp_event_cb,
155 bufferevent_enable (connbase->bev, EV_READ);
159 /* Put fresh message in user_data for the callback and enable the
161 event_assign (connbase->rev, connbase->ctx->evb,
162 event_get_fd (connbase->rev), EV_READ,
163 event_get_callback (connbase->rev),
165 err = event_add (connbase->rev, NULL);
167 return rs_err_connbase_push_fl (connbase, RSE_EVENT, __FILE__, __LINE__,
169 evutil_gai_strerror (err));
171 /* Activate retransmission timer. */
172 conn_activate_timeout (conn);
178 /** Return !=0 if \a conn is an originating connection, i.e. if its
181 conn_originating_p (const struct rs_connection *conn)
183 return conn->active_peer->type == RS_PEER_TYPE_SERVER;
187 baseconn_close (struct rs_conn_base *connbase)
192 rs_debug (("%s: closing fd %d\n", __func__, connbase->fd));
194 err = evutil_closesocket (connbase->fd);
196 err = rs_err_connbase_push (connbase, RSE_EVENT,
197 "evutil_closesocket: %d (%s)",
198 errno, strerror (errno));
203 /* Public functions. */
205 rs_conn_create (struct rs_context *ctx,
206 struct rs_connection **conn,
210 struct rs_connection *c = NULL;
213 c = rs_calloc (ctx, 1, sizeof (struct rs_connection));
215 return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL);
216 conn_init (ctx, &c->base_, RS_CONN_OBJTYPE_GENERIC);
217 err = conn_configure (ctx, &c->base_, config);
232 rs_conn_set_type (struct rs_connection *conn, rs_conn_type_t type)
235 assert (conn->base_.realm);
236 conn->base_.realm->type = type;
240 rs_conn_add_listener (struct rs_connection *conn,
242 const char *hostname,
245 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
250 rs_conn_disconnect (struct rs_connection *conn)
252 int err = baseconn_close (TO_BASE_CONN (conn));
253 conn->state = RS_CONN_STATE_UNDEFINED;
258 rs_conn_destroy (struct rs_connection *conn)
264 /* NOTE: conn->realm is owned by context. */
265 /* NOTE: conn->peers is owned by context. */
267 if (conn->state == RS_CONN_STATE_CONNECTED)
268 err = rs_conn_disconnect (conn);
270 #if defined (RS_ENABLE_TLS)
271 if (conn->tls_ssl) /* FIXME: Free SSL strucxt in rs_conn_disconnect? */
272 SSL_free (conn->tls_ssl);
274 SSL_CTX_free (conn->tls_ctx);
278 event_free (conn->tev);
280 bufferevent_free (conn->base_.bev);
282 event_free (conn->base_.rev);
284 event_free (conn->base_.wev);
286 rs_free (conn->base_.ctx, conn);
292 rs_conn_set_eventbase (struct rs_connection *conn, struct event_base *eb)
294 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
298 rs_conn_set_callbacks (struct rs_connection *conn,
299 struct rs_conn_callbacks *cb,
303 TO_BASE_CONN(conn)->user_data = user_data;
304 memcpy (&conn->callbacks, cb, sizeof (conn->callbacks));
308 rs_conn_del_callbacks (struct rs_connection *conn)
311 memset (&conn->callbacks, 0, sizeof (conn->callbacks));
314 struct rs_conn_callbacks *
315 rs_conn_get_callbacks (struct rs_connection *conn)
318 return &conn->callbacks;
322 rs_conn_select_peer (struct rs_connection *conn, const char *name)
324 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
328 rs_conn_get_current_peer (struct rs_connection *conn,
332 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
336 rs_conn_dispatch (struct rs_connection *conn)
339 return event_base_loop (conn->base_.ctx->evb, EVLOOP_ONCE);
344 *rs_conn_get_evb (const struct rs_connection *conn)
351 int rs_conn_get_fd (struct rs_connection *conn)
354 return conn->base_.fd;
358 _rcb (struct rs_message *message, void *user_data)
360 struct rs_message *msg = (struct rs_message *) user_data;
364 msg->flags |= RS_MESSAGE_RECEIVED;
365 if (msg->conn->base_.bev) /* TCP -- disable bufferevent. */
366 bufferevent_disable (msg->conn->base_.bev, EV_WRITE|EV_READ);
367 else /* UDP -- remove read event. */
368 event_del (msg->conn->base_.rev);
372 rs_conn_receive_message (struct rs_connection *conn,
373 struct rs_message *req_msg,
374 struct rs_message **msg_out)
377 struct rs_message *msg = NULL;
380 assert (conn->base_.realm);
381 assert (!conn_user_dispatch_p (conn)); /* Blocking mode only. */
383 if (rs_message_create (conn, &msg))
386 assert (conn->base_.ctx->evb);
387 assert (conn->base_.fd >= 0);
389 conn->callbacks.received_cb = _rcb;
390 conn->base_.user_data = msg;
391 msg->flags &= ~RS_MESSAGE_RECEIVED;
393 err = conn_add_read_event (conn, msg);
397 rs_debug (("%s: entering event loop\n", __func__));
398 err = event_base_dispatch (conn->base_.ctx->evb);
399 conn->callbacks.received_cb = NULL;
401 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
402 "event_base_dispatch: %s",
403 evutil_gai_strerror (err));
404 rs_debug (("%s: event loop done\n", __func__));
406 if ((msg->flags & RS_MESSAGE_RECEIVED) == 0 /* No message. */
408 && message_verify_response (conn, msg, req_msg) != RSE_OK))
410 if (rs_err_conn_peek_code (conn) == RSE_OK)
412 /* No message and no error on the stack _should_ mean that the
413 server hung up on us. */
414 rs_err_conn_push (conn, RSE_DISCO, "no response");
416 return rs_err_conn_peek_code (conn);
425 rs_conn_set_timeout(struct rs_connection *conn, struct timeval *tv)
429 conn->base_.timeout = *tv;
433 connbase_get_peers (const struct rs_conn_base *connbase)
436 return connbase->peers;