1 /* See the file COPYING for licensing information. */
5 #include <freeradius/libradius.h>
6 #include <event2/event.h>
7 #include <event2/bufferevent.h>
8 #include <radsec/radsec.h>
9 #include <radsec/radsec-impl.h>
12 #include <sys/socket.h>
17 _packet_create (struct rs_connection *conn, struct rs_packet **pkt_out)
26 return rs_err_conn_push (conn, RSE_NOMEM, __func__);
27 rpkt->id = conn->nextid++;
29 p = (struct rs_packet *) malloc (sizeof (struct rs_packet));
33 return rs_err_conn_push (conn, RSE_NOMEM, __func__);
35 memset (p, 0, sizeof (struct rs_packet));
44 _do_send (struct rs_packet *pkt)
48 if (rad_encode (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
49 return rs_err_conn_push_fl (pkg->conn, RSE_FR, __FILE__, __LINE__,
50 "rad_encode: %s", fr_strerror ());
51 if (rad_sign (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
52 return rs_err_conn_push_fl (pkg->conn, RSE_FR, __FILE__, __LINE__,
53 "rad_sign: %s", fr_strerror ());
57 char host[80], serv[80];
59 getnameinfo (pkt->conn->active_peer->addr->ai_addr,
60 pkt->conn->active_peer->addr->ai_addrlen,
61 host, sizeof(host), serv, sizeof(serv),
62 0 /* NI_NUMERICHOST|NI_NUMERICSERV*/);
63 fprintf (stderr, "%s: about to send this to %s:%s:\n", __func__, host,
68 err = bufferevent_write (pkt->conn->bev, pkt->rpkt->data,
71 return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
72 "bufferevent_write: %s",
73 evutil_gai_strerror(err));
78 _event_cb (struct bufferevent *bev, short events, void *ctx)
80 struct rs_packet *pkt = (struct rs_packet *)ctx;
81 struct rs_connection *conn;
87 assert (pkt->conn->active_peer);
89 p = conn->active_peer;
92 if (events & BEV_EVENT_CONNECTED)
95 if (conn->callbacks.connected_cb)
96 conn->callbacks.connected_cb (conn->user_data);
99 fprintf (stderr, "%s: connected\n", __func__);
101 err = _do_send (pkt);
104 if (conn->callbacks.sent_cb)
105 conn->callbacks.sent_cb (conn->user_data);
106 /* Packet will be freed in write callback. */
108 else if (events & BEV_EVENT_ERROR)
109 rs_err_conn_push_fl (pkt->conn, RSE_CONNERR, __FILE__, __LINE__, NULL);
113 _write_cb (struct bufferevent *bev, void *ctx)
115 struct rs_packet *pkt = (struct rs_packet *) ctx;
120 fprintf (stderr, "%s: packet written, breaking event loop\n", __func__);
122 if (event_base_loopbreak (pkt->conn->evb) < 0)
123 abort (); /* FIXME */
124 rs_packet_destroy (pkt);
128 _read_cb (struct bufferevent *bev, void *ctx)
130 struct rs_packet *pkt = (struct rs_packet *) ctx;
135 if (!pkt->hdr_read_flag)
137 n = bufferevent_read (pkt->conn->bev, pkt->hdr, RS_HEADER_LEN);
138 if (n == RS_HEADER_LEN)
140 pkt->hdr_read_flag = 1;
141 pkt->rpkt->data_len = (pkt->hdr[2] << 8) + pkt->hdr[3];
142 if (pkt->rpkt->data_len < 20 /* || len > 4096 */)
143 abort (); /* FIXME: Read and discard packet. */
144 pkt->rpkt->data = rs_malloc (pkt->conn->ctx, pkt->rpkt->data_len);
145 if (!pkt->rpkt->data)
147 rs_err_conn_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
149 abort (); /* FIXME: Read and discard packet. */
151 memcpy (pkt->rpkt->data, pkt->hdr, RS_HEADER_LEN);
152 bufferevent_setwatermark (pkt->conn->bev, EV_READ,
153 pkt->rpkt->data_len - RS_HEADER_LEN, 0);
155 fprintf (stderr, "%s: packet header read, total pkt len=%d\n",
156 __func__, pkt->rpkt->data_len);
160 return; /* Buffer frozen. */
162 assert (!"short header");
166 printf ("%s: trying to read %d octets of packet data\n", __func__, pkt->rpkt->data_len - RS_HEADER_LEN);
168 n = bufferevent_read (pkt->conn->bev, pkt->rpkt->data + RS_HEADER_LEN, pkt->rpkt->data_len - RS_HEADER_LEN);
170 printf ("%s: read %d octets of packet data\n", __func__, n);
172 if (n == pkt->rpkt->data_len - RS_HEADER_LEN)
174 bufferevent_disable (pkt->conn->bev, EV_READ);
175 pkt->hdr_read_flag = 0;
176 memset (pkt->hdr, 0, sizeof(*pkt->hdr));
178 fprintf (stderr, "%s: complete packet read\n", __func__);
180 if (!rad_packet_ok (pkt->rpkt, 0) != 0)
182 if (rad_decode (pkt->rpkt, NULL, pkt->conn->active_peer->secret) != 0)
185 if (pkt->conn->callbacks.received_cb)
186 pkt->conn->callbacks.received_cb(pkt, pkt->conn->user_data);
188 if (event_base_loopbreak (pkt->conn->evb) < 0)
189 abort (); /* FIXME */
192 return; /* Buffer frozen. */
194 assert (!"short packet");
198 _evlog_cb (int severity, const char *msg)
203 case _EVENT_LOG_DEBUG:
204 #if !defined (DEBUG_LEVENT)
212 case _EVENT_LOG_WARN:
222 fprintf (stderr, "libevent: [%s] %s\n", sevstr, msg);
226 _init_evb (struct rs_connection *conn)
231 event_enable_debug_mode ();
233 event_set_log_callback (_evlog_cb);
234 conn->evb = event_base_new ();
236 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
243 _init_socket (struct rs_connection *conn, struct rs_peer *p)
249 p->fd = socket (p->addr->ai_family, p->addr->ai_socktype,
250 p->addr->ai_protocol);
252 return rs_err_conn_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
254 if (evutil_make_socket_nonblocking (p->fd) < 0)
256 evutil_closesocket (p->fd);
257 return rs_err_conn_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
263 static struct rs_peer *
264 _pick_peer (struct rs_connection *conn)
266 if (!conn->active_peer)
267 conn->active_peer = conn->peers;
268 return conn->active_peer;
272 _init_bev (struct rs_connection *conn, struct rs_peer *peer)
276 conn->bev = bufferevent_socket_new (conn->evb, peer->fd, 0);
278 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
279 "bufferevent_socket_new");
285 _do_connect (struct rs_peer *p)
289 err = bufferevent_socket_connect (p->conn->bev, p->addr->ai_addr,
290 p->addr->ai_addrlen);
292 rs_err_conn_push_fl (p->conn, RSE_EVENT, __FILE__, __LINE__,
293 "bufferevent_socket_connect: %s",
294 evutil_gai_strerror(err));
296 p->is_connecting = 1;
300 _conn_open(struct rs_connection *conn, struct rs_packet *pkt)
304 if (_init_evb (conn))
307 p = _pick_peer (conn);
309 return rs_err_conn_push_fl (conn, RSE_NOPEER, __FILE__, __LINE__, NULL);
311 if (_init_socket (conn, p))
314 if (_init_bev (conn, p))
317 if (!p->is_connected)
318 if (!p->is_connecting)
325 _conn_is_open_p (struct rs_connection *conn)
327 return conn->active_peer && conn->active_peer->is_connected;
330 /* Public functions. */
332 rs_packet_create_acc_request (struct rs_connection *conn,
333 struct rs_packet **pkt_out,
334 const char *user_name, const char *user_pw)
336 struct rs_packet *pkt;
337 struct rs_attr *attr;
339 if (_packet_create (conn, pkt_out))
342 pkt->rpkt->code = PW_AUTHENTICATION_REQUEST;
344 if (rs_attr_create (conn, &attr, "User-Name", user_name))
346 rs_packet_add_attr (pkt, attr);
348 if (rs_attr_create (conn, &attr, "User-Password", user_pw))
350 /* FIXME: need this too? rad_pwencode(user_pw, &pwlen, SECRET, reqauth) */
351 rs_packet_add_attr (pkt, attr);
357 rs_packet_send (struct rs_packet *pkt, void *user_data)
359 struct rs_connection *conn;
364 if (_conn_is_open_p (conn))
367 if (_conn_open (conn, pkt))
372 assert (conn->active_peer);
373 assert (conn->active_peer->fd >= 0);
375 if (conn->callbacks.connected_cb || conn->callbacks.disconnected_cb
376 || conn->callbacks.received_cb || conn->callbacks.sent_cb)
377 ; /* FIXME: install event callbacks, other than below */
380 bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
381 event_base_dispatch (conn->evb);
385 fprintf (stderr, "%s: event loop done\n", __func__);
386 assert (event_base_got_break(conn->evb));
393 rs_conn_receive_packet (struct rs_connection *conn, struct rs_packet **pkt_out)
395 struct rs_packet *pkt;
399 if (_packet_create (conn, pkt_out))
404 if (_conn_open (conn, pkt))
408 assert (conn->active_peer);
409 assert (conn->active_peer->fd >= 0);
411 bufferevent_setwatermark (conn->bev, EV_READ, RS_HEADER_LEN, 0);
412 bufferevent_enable (conn->bev, EV_READ);
413 event_base_dispatch (conn->evb);
415 fprintf (stderr, "%s: event loop done", __func__);
416 if (event_base_got_break(conn->evb))
418 fprintf (stderr, ", got this:\n");
419 rs_dump_packet (pkt);
422 fprintf (stderr, ", no reply\n");
429 rs_packet_add_attr(struct rs_packet *pkt, struct rs_attr *attr)
431 pairadd (&pkt->rpkt->vps, attr->vp);
435 struct radius_packet *
436 rs_packet_frpkt(struct rs_packet *pkt)
443 rs_packet_destroy(struct rs_packet *pkt)
447 rad_free (&pkt->rpkt);
448 rs_free (pkt->conn->ctx, pkt);