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>
23 conn_close (struct rs_connection **connp)
28 if ((*connp)->is_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)
53 if (conn->timeout.tv_sec || conn->timeout.tv_usec)
55 rs_debug (("%s: activating timer: %d.%d\n", __func__,
56 conn->timeout.tv_sec, conn->timeout.tv_usec));
57 if (evtimer_add (conn->tev, &conn->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 return conn->realm->type == RS_CONN_TYPE_TLS
68 || conn->realm->type == RS_CONN_TYPE_DTLS;
72 conn_cred_psk (const struct rs_connection *conn)
74 return conn->realm->transport_cred &&
75 conn->realm->transport_cred->type == RS_CRED_TLS_PSK;
79 /* Public functions. */
81 rs_conn_create (struct rs_context *ctx,
82 struct rs_connection **conn,
85 struct rs_connection *c;
87 c = (struct rs_connection *) malloc (sizeof(struct rs_connection));
89 return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL);
91 memset (c, 0, sizeof(struct rs_connection));
96 struct rs_realm *r = rs_conf_find_realm (ctx, config);
102 c->peers = r->peers; /* FIXME: Copy instead? */
103 for (p = c->peers; p; p = p->next)
105 c->timeout.tv_sec = r->timeout;
106 c->tryagain = r->retries;
110 c->realm = rs_malloc (ctx, sizeof (struct rs_realm));
112 return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__,
114 memset (c->realm, 0, sizeof (struct rs_realm));
124 rs_conn_set_type (struct rs_connection *conn, rs_conn_type_t type)
127 assert (conn->realm);
128 conn->realm->type = type;
132 rs_conn_add_listener (struct rs_connection *conn,
134 const char *hostname,
137 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
142 rs_conn_disconnect (struct rs_connection *conn)
148 err = evutil_closesocket (conn->fd);
154 rs_conn_destroy (struct rs_connection *conn)
160 /* NOTE: conn->realm is owned by context. */
161 /* NOTE: conn->peers is owned by context. */
163 if (conn->is_connected)
164 err = rs_conn_disconnect (conn);
166 #if defined (RS_ENABLE_TLS)
167 if (conn->tls_ssl) /* FIXME: Free SSL strucxt in rs_conn_disconnect? */
168 SSL_free (conn->tls_ssl);
170 SSL_CTX_free (conn->tls_ctx);
174 event_free (conn->tev);
176 bufferevent_free (conn->bev);
178 event_free (conn->rev);
180 event_free (conn->wev);
182 event_base_free (conn->evb);
184 rs_free (conn->ctx, conn);
190 rs_conn_set_eventbase (struct rs_connection *conn, struct event_base *eb)
192 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
196 rs_conn_set_callbacks (struct rs_connection *conn, struct rs_conn_callbacks *cb)
199 memcpy (&conn->callbacks, cb, sizeof (conn->callbacks));
203 rs_conn_del_callbacks (struct rs_connection *conn)
206 memset (&conn->callbacks, 0, sizeof (conn->callbacks));
209 struct rs_conn_callbacks *
210 rs_conn_get_callbacks(struct rs_connection *conn)
213 return &conn->callbacks;
217 rs_conn_select_peer (struct rs_connection *conn, const char *name)
219 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
223 rs_conn_get_current_peer (struct rs_connection *conn,
227 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
230 int rs_conn_fd (struct rs_connection *conn)
233 assert (conn->active_peer);
238 _rcb (struct rs_packet *packet, void *user_data)
240 struct rs_packet *pkt = (struct rs_packet *) user_data;
244 pkt->flags |= RS_PACKET_RECEIVED;
246 bufferevent_disable (pkt->conn->bev, EV_WRITE|EV_READ);
248 event_del (pkt->conn->rev);
252 rs_conn_receive_packet (struct rs_connection *conn,
253 struct rs_packet *req_msg,
254 struct rs_packet **pkt_out)
257 struct rs_packet *pkt = NULL;
260 assert (conn->realm);
261 assert (!conn_user_dispatch_p (conn)); /* Blocking mode only. */
263 if (rs_packet_create (conn, &pkt))
267 assert (conn->fd >= 0);
269 conn->callbacks.received_cb = _rcb;
270 conn->user_data = pkt;
271 pkt->flags &= ~RS_PACKET_RECEIVED;
273 if (conn->bev) /* TCP. */
275 bufferevent_setwatermark (conn->bev, EV_READ, RS_HEADER_LEN, 0);
276 bufferevent_setcb (conn->bev, tcp_read_cb, NULL, tcp_event_cb, pkt);
277 bufferevent_enable (conn->bev, EV_READ);
281 /* Put fresh packet in user_data for the callback and enable the
283 event_assign (conn->rev, conn->evb, event_get_fd (conn->rev),
284 EV_READ, event_get_callback (conn->rev), pkt);
285 err = event_add (conn->rev, NULL);
287 return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
289 evutil_gai_strerror (err));
291 /* Activate retransmission timer. */
292 conn_activate_timeout (pkt->conn);
295 rs_debug (("%s: entering event loop\n", __func__));
296 err = event_base_dispatch (conn->evb);
297 conn->callbacks.received_cb = NULL;
299 return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
300 "event_base_dispatch: %s",
301 evutil_gai_strerror (err));
302 rs_debug (("%s: event loop done\n", __func__));
304 if ((pkt->flags & RS_PACKET_RECEIVED) == 0
306 && packet_verify_response (pkt->conn, pkt, req_msg) != RSE_OK))
308 if (rs_err_conn_peek_code (pkt->conn) == RSE_OK)
309 /* No packet and no error on the stack _should_ mean that the
310 server hung up on us. */
311 rs_err_conn_push (pkt->conn, RSE_DISCO, "no response");
312 return rs_err_conn_peek_code (conn);
321 rs_conn_set_timeout(struct rs_connection *conn, struct timeval *tv)