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_conn_err_push (conn, RSE_NOMEM, __func__);
29 p = (struct rs_packet *) malloc (sizeof (struct rs_packet));
33 return rs_conn_err_push (conn, RSE_NOMEM, __func__);
35 memset (p, 0, sizeof (struct rs_packet));
44 _do_send (struct rs_packet *pkt)
48 rad_encode (pkt->rpkt, NULL, pkt->conn->active_peer->secret);
52 char host[80], serv[80];
54 getnameinfo (pkt->conn->active_peer->addr->ai_addr,
55 pkt->conn->active_peer->addr->ai_addrlen,
56 host, sizeof(host), serv, sizeof(serv),
57 0 /* NI_NUMERICHOST|NI_NUMERICSERV*/);
58 fprintf (stderr, "%s: about to send this to %s:%s:\n", __func__, host,
63 err = bufferevent_write (pkt->conn->bev, pkt->rpkt->data,
66 rs_conn_err_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
67 "bufferevent_write: %s", evutil_gai_strerror(err));
71 _event_cb (struct bufferevent *bev, short events, void *ctx)
73 struct rs_packet *pkt = (struct rs_packet *) ctx;
74 struct rs_connection *conn;
79 assert (pkt->conn->active_peer);
81 p = conn->active_peer;
84 if (events & BEV_EVENT_CONNECTED)
88 fprintf (stderr, "%s: connected\n", __func__);
91 /* Packet will be freed in write callback. */
93 else if (events & BEV_EVENT_ERROR)
94 rs_conn_err_push_fl (pkt->conn, RSE_CONNERR, __FILE__, __LINE__, NULL);
98 _write_cb (struct bufferevent *bev, void *ctx)
100 struct rs_packet *pkt = (struct rs_packet *) ctx;
105 fprintf (stderr, "%s: packet written, breaking event loop\n", __func__);
107 if (event_base_loopbreak (pkt->conn->evb) < 0)
108 abort (); /* FIXME */
109 rs_packet_destroy (pkt);
113 _read_cb (struct bufferevent *bev, void *ctx)
115 struct rs_packet *pkt = (struct rs_packet *) ctx;
120 if (!pkt->hdr_read_flag)
122 n = bufferevent_read (pkt->conn->bev, pkt->hdr, RS_HEADER_LEN);
123 if (n == RS_HEADER_LEN)
125 pkt->hdr_read_flag = 1;
126 pkt->rpkt->data_len = (pkt->hdr[2] << 8) + pkt->hdr[3];
127 if (pkt->rpkt->data_len < 20 /* || len > 4096 */)
128 abort (); /* FIXME: Read and discard packet. */
129 pkt->rpkt->data = rs_malloc (pkt->conn->ctx, pkt->rpkt->data_len);
130 if (!pkt->rpkt->data)
132 rs_conn_err_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
134 abort (); /* FIXME: Read and discard packet. */
136 memcpy (pkt->rpkt->data, pkt->hdr, RS_HEADER_LEN);
137 bufferevent_setwatermark (pkt->conn->bev, EV_READ,
138 pkt->rpkt->data_len - RS_HEADER_LEN, 0);
140 fprintf (stderr, "%s: packet header read, total pkt len=%d\n",
141 __func__, pkt->rpkt->data_len);
145 return; /* Buffer frozen. */
147 assert (!"short header");
151 printf ("%s: trying to read %d octets of packet data\n", __func__, pkt->rpkt->data_len - RS_HEADER_LEN);
153 n = bufferevent_read (pkt->conn->bev, pkt->rpkt->data + RS_HEADER_LEN, pkt->rpkt->data_len - RS_HEADER_LEN);
155 printf ("%s: read %d octets of packet data\n", __func__, n);
157 if (n == pkt->rpkt->data_len - RS_HEADER_LEN)
159 bufferevent_disable (pkt->conn->bev, EV_READ);
160 pkt->hdr_read_flag = 0;
161 memset (pkt->hdr, 0, sizeof(*pkt->hdr));
163 fprintf (stderr, "%s: complete packet read\n", __func__);
165 rad_decode (pkt->rpkt, NULL, pkt->conn->active_peer->secret);
166 if (event_base_loopbreak (pkt->conn->evb) < 0)
167 abort (); /* FIXME */
170 return; /* Buffer frozen. */
172 assert (!"short packet");
177 _evlog_cb (int severity, const char *msg)
182 case _EVENT_LOG_DEBUG:
188 case _EVENT_LOG_WARN:
198 fprintf (stderr, "libevent: [%s] %s\n", sevstr, msg);
203 _init_evb (struct rs_connection *conn)
208 event_enable_debug_mode ();
209 event_set_log_callback (_evlog_cb);
211 conn->evb = event_base_new ();
213 return rs_conn_err_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
220 _init_socket (struct rs_connection *conn, struct rs_peer *p)
226 p->fd = socket (p->addr->ai_family, p->addr->ai_socktype,
227 p->addr->ai_protocol);
229 return rs_conn_err_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
231 if (evutil_make_socket_nonblocking (p->fd) < 0)
233 evutil_closesocket (p->fd);
234 return rs_conn_err_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
240 static struct rs_peer *
241 _pick_peer (struct rs_connection *conn)
243 if (!conn->active_peer)
244 conn->active_peer = conn->peers;
245 return conn->active_peer;
249 _init_bev (struct rs_connection *conn, struct rs_peer *peer)
253 conn->bev = bufferevent_socket_new (conn->evb, peer->fd, 0);
255 return rs_conn_err_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
256 "bufferevent_socket_new");
262 _do_connect (struct rs_peer *p)
266 err = bufferevent_socket_connect (p->conn->bev, p->addr->ai_addr,
267 p->addr->ai_addrlen);
269 rs_conn_err_push_fl (p->conn, RSE_EVENT, __FILE__, __LINE__,
270 "bufferevent_socket_connect: %s",
271 evutil_gai_strerror(err));
273 p->is_connecting = 1;
277 _conn_open(struct rs_connection *conn, struct rs_packet *pkt)
281 if (_init_evb (conn))
284 p = _pick_peer (conn);
286 return rs_conn_err_push_fl (conn, RSE_NOPEER, __FILE__, __LINE__, NULL);
288 if (_init_socket (conn, p))
291 if (_init_bev (conn, p))
294 if (!p->is_connected)
295 if (!p->is_connecting)
302 _conn_is_open_p (struct rs_connection *conn)
304 return conn->active_peer && conn->active_peer->is_connected;
307 /* Public functions. */
309 rs_packet_create_acc_request (struct rs_connection *conn,
310 struct rs_packet **pkt_out,
311 const char *user_name, const char *user_pw)
313 struct rs_packet *pkt;
314 struct rs_attr *attr;
316 if (_packet_create (conn, pkt_out))
319 pkt->rpkt->code = PW_AUTHENTICATION_REQUEST;
321 if (rs_attr_create (conn, &attr, "User-Name", user_name))
323 rs_packet_add_attr (pkt, attr);
325 if (rs_attr_create (conn, &attr, "User-Password", user_pw))
327 /* FIXME: need this too? rad_pwencode(user_pw, &pwlen, SECRET, reqauth) */
328 rs_packet_add_attr (pkt, attr);
334 rs_packet_send (struct rs_packet *pkt, void *user_data)
336 struct rs_connection *conn;
340 if (_conn_is_open_p (conn))
343 if (_conn_open (conn, pkt))
348 assert (conn->active_peer);
349 assert (conn->active_peer->fd >= 0);
351 if (conn->callbacks.connected_cb || conn->callbacks.disconnected_cb
352 || conn->callbacks.received_cb || conn->callbacks.sent_cb)
353 ; /* FIXME: install event callbacks, other than below */
356 bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
357 event_base_dispatch (conn->evb);
361 fprintf (stderr, "%s: event loop done\n", __func__);
362 assert (event_base_got_break(conn->evb));
369 rs_conn_receive_packet (struct rs_connection *conn, struct rs_packet **pkt_out)
371 struct rs_packet *pkt;
375 if (_packet_create (conn, pkt_out))
380 if (_conn_open (conn, pkt))
384 assert (conn->active_peer);
385 assert (conn->active_peer->fd >= 0);
387 bufferevent_setwatermark (conn->bev, EV_READ, RS_HEADER_LEN, 0);
388 bufferevent_enable (conn->bev, EV_READ);
389 event_base_dispatch (conn->evb);
391 fprintf (stderr, "%s: event loop done", __func__);
392 if (event_base_got_break(conn->evb))
394 fprintf (stderr, ", got this:\n");
395 rs_dump_packet (pkt);
398 fprintf (stderr, ", no reply\n");
405 rs_packet_add_attr(struct rs_packet *pkt, struct rs_attr *attr)
407 pairadd (&pkt->rpkt->vps, attr->vp);
411 struct radius_packet *
412 rs_packet_frpkt(struct rs_packet *pkt)
419 rs_packet_destroy(struct rs_packet *pkt)
421 rad_free (&pkt->rpkt);
422 rs_free (pkt->conn->ctx, pkt);