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)
50 assert (!pkt->original);
52 vp = paircreate (PW_MESSAGE_AUTHENTICATOR, PW_TYPE_OCTETS);
54 return rs_err_conn_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
55 "rad_encode: %s", fr_strerror ());
56 pairadd (&pkt->rpkt->vps, vp);
58 if (rad_encode (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
59 return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
60 "rad_encode: %s", fr_strerror ());
61 if (rad_sign (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
62 return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
63 "rad_sign: %s", fr_strerror ());
66 char host[80], serv[80];
68 getnameinfo (pkt->conn->active_peer->addr->ai_addr,
69 pkt->conn->active_peer->addr->ai_addrlen,
70 host, sizeof(host), serv, sizeof(serv),
71 0 /* NI_NUMERICHOST|NI_NUMERICSERV*/);
72 fprintf (stderr, "%s: about to send this to %s:%s:\n", __func__, host,
77 err = bufferevent_write (pkt->conn->bev, pkt->rpkt->data,
80 return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
81 "bufferevent_write: %s",
82 evutil_gai_strerror(err));
87 _event_cb (struct bufferevent *bev, short events, void *ctx)
89 struct rs_packet *pkt = (struct rs_packet *)ctx;
90 struct rs_connection *conn;
96 assert (pkt->conn->active_peer);
98 p = conn->active_peer;
100 p->is_connecting = 0;
101 if (events & BEV_EVENT_CONNECTED)
104 if (conn->callbacks.connected_cb)
105 conn->callbacks.connected_cb (conn->user_data);
108 fprintf (stderr, "%s: connected\n", __func__);
112 if (conn->callbacks.sent_cb)
113 conn->callbacks.sent_cb (conn->user_data);
114 /* Packet will be freed in write callback. */
116 else if (events & BEV_EVENT_ERROR)
117 rs_err_conn_push_fl (pkt->conn, RSE_CONNERR, __FILE__, __LINE__, NULL);
121 _write_cb (struct bufferevent *bev, void *ctx)
123 struct rs_packet *pkt = (struct rs_packet *) ctx;
128 fprintf (stderr, "%s: packet written, breaking event loop\n", __func__);
130 if (event_base_loopbreak (pkt->conn->evb) < 0)
131 abort (); /* FIXME */
132 if (!pkt->conn->callbacks.sent_cb) /* Callback owns the packet now. */
133 rs_packet_destroy (pkt);
137 _read_cb (struct bufferevent *bev, void *ctx)
139 struct rs_packet *pkt = (struct rs_packet *)ctx;
145 pkt->rpkt->sockfd = pkt->conn->active_peer->fd; /* FIXME: Why? */
146 pkt->rpkt->vps = NULL; /* FIXME: Why? */
148 if (!pkt->hdr_read_flag)
150 n = bufferevent_read (pkt->conn->bev, pkt->hdr, RS_HEADER_LEN);
151 if (n == RS_HEADER_LEN)
153 pkt->hdr_read_flag = 1;
154 pkt->rpkt->data_len = (pkt->hdr[2] << 8) + pkt->hdr[3];
155 if (pkt->rpkt->data_len < 20 /* || len > 4096 */)
156 abort (); /* FIXME: Read and discard packet. */
157 pkt->rpkt->data = rs_malloc (pkt->conn->ctx, pkt->rpkt->data_len);
158 if (!pkt->rpkt->data)
160 rs_err_conn_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
162 abort (); /* FIXME: Read and discard packet. */
164 memcpy (pkt->rpkt->data, pkt->hdr, RS_HEADER_LEN);
165 bufferevent_setwatermark (pkt->conn->bev, EV_READ,
166 pkt->rpkt->data_len - RS_HEADER_LEN, 0);
168 fprintf (stderr, "%s: packet header read, total pkt len=%d\n",
169 __func__, pkt->rpkt->data_len);
173 return; /* Buffer frozen. */
175 assert (!"short header");
179 printf ("%s: trying to read %d octets of packet data\n", __func__, pkt->rpkt->data_len - RS_HEADER_LEN);
181 n = bufferevent_read (pkt->conn->bev, pkt->rpkt->data + RS_HEADER_LEN, pkt->rpkt->data_len - RS_HEADER_LEN);
183 printf ("%s: read %d octets of packet data\n", __func__, n);
185 if (n == pkt->rpkt->data_len - RS_HEADER_LEN)
187 bufferevent_disable (pkt->conn->bev, EV_READ);
188 pkt->hdr_read_flag = 0;
189 memset (pkt->hdr, 0, sizeof(*pkt->hdr));
191 fprintf (stderr, "%s: complete packet read\n", __func__);
193 if (!rad_packet_ok (pkt->rpkt, 0) != 0)
195 assert (pkt->original);
197 /* Verify header and message authenticator. */
198 if (rad_verify (pkt->rpkt, pkt->original->rpkt,
199 pkt->conn->active_peer->secret))
201 rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
202 "rad_verify: %s", fr_strerror ());
206 /* decode and decrypt */
207 if (rad_decode (pkt->rpkt, pkt->original->rpkt,
208 pkt->conn->active_peer->secret))
210 rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
211 "rad_decode: %s", fr_strerror ());
215 if (pkt->conn->callbacks.received_cb)
216 pkt->conn->callbacks.received_cb (pkt, pkt->conn->user_data);
218 if (event_base_loopbreak (pkt->conn->evb) < 0)
219 abort (); /* FIXME */
222 return; /* Buffer frozen. */
224 assert (!"short packet");
228 _evlog_cb (int severity, const char *msg)
233 case _EVENT_LOG_DEBUG:
234 #if !defined (DEBUG_LEVENT)
242 case _EVENT_LOG_WARN:
252 fprintf (stderr, "libevent: [%s] %s\n", sevstr, msg);
256 _init_evb (struct rs_connection *conn)
261 event_enable_debug_mode ();
263 event_set_log_callback (_evlog_cb);
264 conn->evb = event_base_new ();
266 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
273 _init_socket (struct rs_connection *conn, struct rs_peer *p)
279 p->fd = socket (p->addr->ai_family, p->addr->ai_socktype,
280 p->addr->ai_protocol);
282 return rs_err_conn_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
284 if (evutil_make_socket_nonblocking (p->fd) < 0)
286 evutil_closesocket (p->fd);
287 return rs_err_conn_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
293 static struct rs_peer *
294 _pick_peer (struct rs_connection *conn)
296 if (!conn->active_peer)
297 conn->active_peer = conn->peers;
298 return conn->active_peer;
302 _init_bev (struct rs_connection *conn, struct rs_peer *peer)
306 conn->bev = bufferevent_socket_new (conn->evb, peer->fd, 0);
308 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
309 "bufferevent_socket_new");
315 _do_connect (struct rs_peer *p)
319 err = bufferevent_socket_connect (p->conn->bev, p->addr->ai_addr,
320 p->addr->ai_addrlen);
322 rs_err_conn_push_fl (p->conn, RSE_EVENT, __FILE__, __LINE__,
323 "bufferevent_socket_connect: %s",
324 evutil_gai_strerror(err));
326 p->is_connecting = 1;
330 _conn_open(struct rs_connection *conn, struct rs_packet *pkt)
334 if (_init_evb (conn))
337 p = _pick_peer (conn);
339 return rs_err_conn_push_fl (conn, RSE_NOPEER, __FILE__, __LINE__, NULL);
341 if (_init_socket (conn, p))
344 if (_init_bev (conn, p))
347 if (!p->is_connected)
348 if (!p->is_connecting)
355 _conn_is_open_p (struct rs_connection *conn)
357 return conn->active_peer && conn->active_peer->is_connected;
360 /* Public functions. */
362 rs_packet_create_acc_request (struct rs_connection *conn,
363 struct rs_packet **pkt_out,
364 const char *user_name, const char *user_pw)
366 struct rs_packet *pkt;
367 struct rs_attr *attr;
369 if (_packet_create (conn, pkt_out))
372 pkt->rpkt->code = PW_AUTHENTICATION_REQUEST;
376 if (rs_attr_create (conn, &attr, "User-Name", user_name))
378 rs_packet_add_attr (pkt, attr);
382 if (rs_attr_create (conn, &attr, "User-Password", user_pw))
384 /* FIXME: need this too? rad_pwencode(user_pw, &pwlen, SECRET, reqauth) */
385 rs_packet_add_attr (pkt, attr);
393 rs_packet_send (struct rs_packet *pkt, void *user_data)
395 struct rs_connection *conn;
400 if (_conn_is_open_p (conn))
403 if (_conn_open (conn, pkt))
408 assert (conn->active_peer);
409 assert (conn->active_peer->fd >= 0);
411 conn->user_data = user_data;
412 bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
413 if (!conn->user_dispatch_flag)
414 event_base_dispatch (conn->evb);
417 fprintf (stderr, "%s: event loop done\n", __func__);
418 assert (event_base_got_break(conn->evb));
425 rs_conn_receive_packet (struct rs_connection *conn,
426 struct rs_packet *request,
427 struct rs_packet **pkt_out)
429 struct rs_packet *pkt;
433 if (_packet_create (conn, pkt_out))
437 pkt->original = request;
439 if (_conn_open (conn, pkt))
443 assert (conn->active_peer);
444 assert (conn->active_peer->fd >= 0);
446 bufferevent_setwatermark (conn->bev, EV_READ, RS_HEADER_LEN, 0);
447 bufferevent_enable (conn->bev, EV_READ);
448 bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
450 if (!conn->user_dispatch_flag)
452 event_base_dispatch (conn->evb);
454 fprintf (stderr, "%s: event loop done", __func__);
455 if (event_base_got_break(conn->evb))
457 fprintf (stderr, ", got this:\n");
458 rs_dump_packet (pkt);
461 fprintf (stderr, ", no reply\n");
465 pkt->original = NULL;
471 rs_packet_add_attr(struct rs_packet *pkt, struct rs_attr *attr)
473 pairadd (&pkt->rpkt->vps, attr->vp);
477 struct radius_packet *
478 rs_packet_frpkt(struct rs_packet *pkt)
485 rs_packet_destroy(struct rs_packet *pkt)
489 rad_free (&pkt->rpkt);
490 rs_free (pkt->conn->ctx, pkt);