1 /* See the file COPYING for licensing information. */
3 #if defined HAVE_CONFIG_H
10 #include <freeradius/libradius.h>
11 #include <event2/event.h>
12 #include <event2/bufferevent.h>
13 #if defined RS_ENABLE_TLS
14 #include <event2/bufferevent_ssl.h>
15 #include <openssl/err.h>
17 #include <radsec/radsec.h>
18 #include <radsec/radsec-impl.h>
22 #include <sys/socket.h>
27 _packet_create (struct rs_connection *conn, struct rs_packet **pkt_out)
36 return rs_err_conn_push (conn, RSE_NOMEM, __func__);
37 rpkt->id = conn->nextid++;
39 p = (struct rs_packet *) malloc (sizeof (struct rs_packet));
43 return rs_err_conn_push (conn, RSE_NOMEM, __func__);
45 memset (p, 0, sizeof (struct rs_packet));
54 _do_send (struct rs_packet *pkt)
60 assert (!pkt->original);
62 vp = paircreate (PW_MESSAGE_AUTHENTICATOR, PW_TYPE_OCTETS);
64 return rs_err_conn_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
65 "rad_encode: %s", fr_strerror ());
66 pairadd (&pkt->rpkt->vps, vp);
68 if (rad_encode (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
69 return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
70 "rad_encode: %s", fr_strerror ());
71 if (rad_sign (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
72 return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
73 "rad_sign: %s", fr_strerror ());
76 char host[80], serv[80];
78 getnameinfo (pkt->conn->active_peer->addr->ai_addr,
79 pkt->conn->active_peer->addr->ai_addrlen,
80 host, sizeof(host), serv, sizeof(serv),
81 0 /* NI_NUMERICHOST|NI_NUMERICSERV*/);
82 fprintf (stderr, "%s: about to send this to %s:%s:\n", __func__, host,
87 err = bufferevent_write (pkt->conn->bev, pkt->rpkt->data,
90 return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
91 "bufferevent_write: %s",
92 evutil_gai_strerror(err));
97 _event_cb (struct bufferevent *bev, short events, void *ctx)
99 struct rs_packet *pkt = (struct rs_packet *)ctx;
100 struct rs_connection *conn;
106 assert (pkt->conn->active_peer);
108 p = conn->active_peer;
110 p->is_connecting = 0;
111 if (events & BEV_EVENT_CONNECTED)
114 if (conn->callbacks.connected_cb)
115 conn->callbacks.connected_cb (conn->user_data);
117 fprintf (stderr, "%s: connected\n", __func__);
121 if (conn->callbacks.sent_cb)
122 conn->callbacks.sent_cb (conn->user_data);
123 /* Packet will be freed in write callback. */
125 else if (events & BEV_EVENT_ERROR)
127 #if defined RS_ENABLE_TLS
128 if (conn->tls_ssl) /* FIXME: correct check? */
130 for (err = bufferevent_get_openssl_error (conn->bev);
132 err = bufferevent_get_openssl_error (conn->bev))
134 fprintf (stderr, "%s: openssl error: %s\n", __func__,
135 ERR_error_string (err, NULL)); /* DEBUG, until verified that pushed errors will actually be handled */
136 rs_err_conn_push_fl (pkt->conn, RSE_SSLERR, __FILE__, __LINE__,
141 rs_err_conn_push_fl (pkt->conn, RSE_CONNERR, __FILE__, __LINE__, NULL);
142 fprintf (stderr, "%s: BEV_EVENT_ERROR\n", __func__); /* DEBUG, until verified that pushed errors will actually be handled */
147 _write_cb (struct bufferevent *bev, void *ctx)
149 struct rs_packet *pkt = (struct rs_packet *) ctx;
154 fprintf (stderr, "%s: packet written, breaking event loop\n", __func__);
156 if (event_base_loopbreak (pkt->conn->evb) < 0)
157 abort (); /* FIXME */
158 if (!pkt->conn->callbacks.sent_cb) /* Callback owns the packet now. */
159 rs_packet_destroy (pkt);
163 _read_cb (struct bufferevent *bev, void *ctx)
165 struct rs_packet *pkt = (struct rs_packet *)ctx;
171 pkt->rpkt->sockfd = pkt->conn->active_peer->fd; /* FIXME: Why? */
172 pkt->rpkt->vps = NULL; /* FIXME: Why? */
174 if (!pkt->hdr_read_flag)
176 n = bufferevent_read (pkt->conn->bev, pkt->hdr, RS_HEADER_LEN);
177 if (n == RS_HEADER_LEN)
179 pkt->hdr_read_flag = 1;
180 pkt->rpkt->data_len = (pkt->hdr[2] << 8) + pkt->hdr[3];
181 if (pkt->rpkt->data_len < 20 /* || len > 4096 */)
182 abort (); /* FIXME: Read and discard packet. */
183 pkt->rpkt->data = rs_malloc (pkt->conn->ctx, pkt->rpkt->data_len);
184 if (!pkt->rpkt->data)
186 rs_err_conn_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
188 abort (); /* FIXME: Read and discard packet. */
190 memcpy (pkt->rpkt->data, pkt->hdr, RS_HEADER_LEN);
191 bufferevent_setwatermark (pkt->conn->bev, EV_READ,
192 pkt->rpkt->data_len - RS_HEADER_LEN, 0);
194 fprintf (stderr, "%s: packet header read, total pkt len=%d\n",
195 __func__, pkt->rpkt->data_len);
199 return; /* Buffer frozen. */
201 assert (!"short header");
205 printf ("%s: trying to read %d octets of packet data\n", __func__, pkt->rpkt->data_len - RS_HEADER_LEN);
207 n = bufferevent_read (pkt->conn->bev, pkt->rpkt->data + RS_HEADER_LEN, pkt->rpkt->data_len - RS_HEADER_LEN);
209 printf ("%s: read %d octets of packet data\n", __func__, n);
211 if (n == pkt->rpkt->data_len - RS_HEADER_LEN)
213 bufferevent_disable (pkt->conn->bev, EV_READ);
214 pkt->hdr_read_flag = 0;
215 memset (pkt->hdr, 0, sizeof(*pkt->hdr));
217 fprintf (stderr, "%s: complete packet read\n", __func__);
219 if (!rad_packet_ok (pkt->rpkt, 0) != 0)
221 assert (pkt->original);
223 /* Verify header and message authenticator. */
224 if (rad_verify (pkt->rpkt, pkt->original->rpkt,
225 pkt->conn->active_peer->secret))
227 rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
228 "rad_verify: %s", fr_strerror ());
232 /* Decode and decrypt. */
233 if (rad_decode (pkt->rpkt, pkt->original->rpkt,
234 pkt->conn->active_peer->secret))
236 rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
237 "rad_decode: %s", fr_strerror ());
241 if (pkt->conn->callbacks.received_cb)
242 pkt->conn->callbacks.received_cb (pkt, pkt->conn->user_data);
244 if (event_base_loopbreak (pkt->conn->evb) < 0)
245 abort (); /* FIXME */
248 return; /* Buffer frozen. */
250 assert (!"short packet");
254 _evlog_cb (int severity, const char *msg)
259 case _EVENT_LOG_DEBUG:
260 #if !defined (DEBUG_LEVENT)
268 case _EVENT_LOG_WARN:
278 fprintf (stderr, "libevent: [%s] %s\n", sevstr, msg);
282 _init_evb (struct rs_connection *conn)
287 event_enable_debug_mode ();
289 event_set_log_callback (_evlog_cb);
290 conn->evb = event_base_new ();
292 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
299 _init_socket (struct rs_connection *conn, struct rs_peer *p)
305 p->fd = socket (p->addr->ai_family, p->addr->ai_socktype,
306 p->addr->ai_protocol);
308 return rs_err_conn_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
310 if (evutil_make_socket_nonblocking (p->fd) < 0)
312 evutil_closesocket (p->fd);
313 return rs_err_conn_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
319 static struct rs_peer *
320 _pick_peer (struct rs_connection *conn)
322 if (!conn->active_peer)
323 conn->active_peer = conn->peers;
324 return conn->active_peer;
328 _init_bev (struct rs_connection *conn, struct rs_peer *peer)
335 case RS_CONN_TYPE_UDP:
336 case RS_CONN_TYPE_TCP:
337 conn->bev = bufferevent_socket_new (conn->evb, peer->fd, 0);
339 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
340 "bufferevent_socket_new");
342 case RS_CONN_TYPE_TLS:
343 if (rs_tls_init (conn))
345 /* Would be convenient to pass BEV_OPT_CLOSE_ON_FREE but things
346 seem to break when be_openssl_ctrl() (in libevent) calls
347 SSL_set_bio() after BIO_new_socket() with flag=1. */
349 bufferevent_openssl_socket_new (conn->evb, peer->fd, conn->tls_ssl,
350 BUFFEREVENT_SSL_CONNECTING, 0);
352 return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
353 "bufferevent_openssl_socket_new");
356 case RS_CONN_TYPE_DTLS:
357 return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__,
358 "%s: NYI", __func__);
360 return rs_err_conn_push_fl (conn, RSE_INTERNAL, __FILE__, __LINE__,
361 "%s: invalid connection type: %d", __func__,
369 _do_connect (struct rs_peer *p)
373 err = bufferevent_socket_connect (p->conn->bev, p->addr->ai_addr,
374 p->addr->ai_addrlen);
376 rs_err_conn_push_fl (p->conn, RSE_EVENT, __FILE__, __LINE__,
377 "bufferevent_socket_connect: %s",
378 evutil_gai_strerror(err));
380 p->is_connecting = 1;
384 _conn_open(struct rs_connection *conn, struct rs_packet *pkt)
388 if (_init_evb (conn))
391 p = _pick_peer (conn);
393 return rs_err_conn_push_fl (conn, RSE_NOPEER, __FILE__, __LINE__, NULL);
395 if (_init_socket (conn, p))
398 if (_init_bev (conn, p))
401 if (!p->is_connected)
402 if (!p->is_connecting)
409 _conn_is_open_p (struct rs_connection *conn)
411 return conn->active_peer && conn->active_peer->is_connected;
414 /* Public functions. */
416 rs_packet_create_acc_request (struct rs_connection *conn,
417 struct rs_packet **pkt_out,
418 const char *user_name, const char *user_pw)
420 struct rs_packet *pkt;
421 struct rs_attr *attr;
423 if (_packet_create (conn, pkt_out))
426 pkt->rpkt->code = PW_AUTHENTICATION_REQUEST;
430 if (rs_attr_create (conn, &attr, "User-Name", user_name))
432 rs_packet_add_attr (pkt, attr);
436 if (rs_attr_create (conn, &attr, "User-Password", user_pw))
438 /* FIXME: need this too? rad_pwencode(user_pw, &pwlen, SECRET, reqauth) */
439 rs_packet_add_attr (pkt, attr);
447 rs_packet_send (struct rs_packet *pkt, void *user_data)
449 struct rs_connection *conn;
454 if (_conn_is_open_p (conn))
457 if (_conn_open (conn, pkt))
462 assert (conn->active_peer);
463 assert (conn->active_peer->fd >= 0);
465 conn->user_data = user_data;
466 bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
467 if (!conn->user_dispatch_flag)
468 event_base_dispatch (conn->evb);
471 fprintf (stderr, "%s: event loop done\n", __func__);
472 assert (event_base_got_break(conn->evb));
479 rs_conn_receive_packet (struct rs_connection *conn,
480 struct rs_packet *request,
481 struct rs_packet **pkt_out)
483 struct rs_packet *pkt;
487 if (_packet_create (conn, pkt_out))
491 pkt->original = request;
493 if (_conn_open (conn, pkt))
497 assert (conn->active_peer);
498 assert (conn->active_peer->fd >= 0);
500 bufferevent_setwatermark (conn->bev, EV_READ, RS_HEADER_LEN, 0);
501 bufferevent_enable (conn->bev, EV_READ);
502 bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
504 if (!conn->user_dispatch_flag)
506 event_base_dispatch (conn->evb);
508 fprintf (stderr, "%s: event loop done", __func__);
509 if (event_base_got_break(conn->evb))
511 fprintf (stderr, ", got this:\n");
512 rs_dump_packet (pkt);
515 fprintf (stderr, ", no reply\n");
519 pkt->original = NULL;
525 rs_packet_add_attr(struct rs_packet *pkt, struct rs_attr *attr)
527 pairadd (&pkt->rpkt->vps, attr->vp);
531 struct radius_packet *
532 rs_packet_frpkt(struct rs_packet *pkt)
539 rs_packet_destroy(struct rs_packet *pkt)
543 // TODO: free all attributes
544 rad_free (&pkt->rpkt);
545 rs_free (pkt->conn->ctx, pkt);