/* See the file COPYING for licensing information. */
+#if defined HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
#include <string.h>
+#include <errno.h>
+#include <sys/time.h>
#include <assert.h>
#include <freeradius/libradius.h>
#include <event2/event.h>
#include <event2/bufferevent.h>
#include <radsec/radsec.h>
#include <radsec/radsec-impl.h>
-#if defined DEBUG
+#include "tls.h"
+#include "debug.h"
+#if defined (RS_ENABLE_TLS)
+#include <event2/bufferevent_ssl.h>
+#include <openssl/err.h>
+#endif
+#if defined (DEBUG)
#include <netdb.h>
#include <sys/socket.h>
-#include "debug.h"
+#include <event2/buffer.h>
#endif
static int
-_packet_create (struct rs_connection *conn, struct rs_packet **pkt_out)
+_loopbreak (struct rs_connection *conn)
{
- struct rs_packet *p;
- RADIUS_PACKET *rpkt;
-
- *pkt_out = NULL;
-
- rpkt = rad_alloc (1);
- if (!rpkt)
- return rs_conn_err_push (conn, RSE_NOMEM, __func__);
- rpkt->id = -1;
-
- p = (struct rs_packet *) malloc (sizeof (struct rs_packet));
- if (!p)
- {
- rad_free (&rpkt);
- return rs_conn_err_push (conn, RSE_NOMEM, __func__);
- }
- memset (p, 0, sizeof (struct rs_packet));
- p->conn = conn;
- p->rpkt = rpkt;
-
- *pkt_out = p;
- return RSE_OK;
+ int err = event_base_loopbreak (conn->evb);
+ if (err < 0)
+ rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
+ "event_base_loopbreak: %s",
+ evutil_gai_strerror (err));
+ return err;
}
-static void
+static int
_do_send (struct rs_packet *pkt)
{
int err;
+ VALUE_PAIR *vp;
- rad_encode (pkt->rpkt, NULL, pkt->conn->active_peer->secret);
assert (pkt->rpkt);
+ assert (!pkt->original);
+
+ /* Add Message-Authenticator, RFC 2869. */
+ /* FIXME: Make Message-Authenticator optional? */
+ vp = paircreate (PW_MESSAGE_AUTHENTICATOR, PW_TYPE_OCTETS);
+ if (!vp)
+ return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
+ "paircreate: %s", fr_strerror ());
+ pairadd (&pkt->rpkt->vps, vp);
+
+ if (rad_encode (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
+ return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
+ "rad_encode: %s", fr_strerror ());
+ if (rad_sign (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
+ return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
+ "rad_sign: %s", fr_strerror ());
#if defined (DEBUG)
{
char host[80], serv[80];
pkt->conn->active_peer->addr->ai_addrlen,
host, sizeof(host), serv, sizeof(serv),
0 /* NI_NUMERICHOST|NI_NUMERICSERV*/);
- fprintf (stderr, "%s: about to send this to %s:%s:\n", __func__, host,
- serv);
+ rs_debug (("%s: about to send this to %s:%s:\n", __func__, host, serv));
rs_dump_packet (pkt);
}
#endif
+
err = bufferevent_write (pkt->conn->bev, pkt->rpkt->data,
pkt->rpkt->data_len);
if (err < 0)
- rs_conn_err_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
- "bufferevent_write: %s", evutil_gai_strerror(err));
+ return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
+ "bufferevent_write: %s",
+ evutil_gai_strerror (err));
+ return RSE_OK;
+}
+
+static void
+_on_connect (struct rs_connection *conn)
+{
+ conn->is_connected = 1;
+ rs_debug (("%s: %p connected\n", __func__, conn->active_peer));
+ evtimer_del (conn->tev);
+ if (conn->callbacks.connected_cb)
+ conn->callbacks.connected_cb (conn->user_data);
+}
+
+static void
+_on_disconnect (struct rs_connection *conn)
+{
+ conn->is_connecting = 0;
+ conn->is_connected = 0;
+ rs_debug (("%s: %p disconnected\n", __func__, conn->active_peer));
+ if (conn->callbacks.disconnected_cb)
+ conn->callbacks.disconnected_cb (conn->user_data);
}
static void
_event_cb (struct bufferevent *bev, short events, void *ctx)
{
- struct rs_packet *pkt = (struct rs_packet *) ctx;
- struct rs_connection *conn;
- struct rs_peer *p;
+ struct rs_packet *pkt = (struct rs_packet *)ctx;
+ struct rs_connection *conn = NULL;
+ struct rs_peer *p = NULL;
+ int sockerr = 0;
+#if defined (RS_ENABLE_TLS)
+ unsigned long tlserr = 0;
+#endif
assert (pkt);
assert (pkt->conn);
conn = pkt->conn;
p = conn->active_peer;
- p->is_connecting = 0;
+ conn->is_connecting = 0;
if (events & BEV_EVENT_CONNECTED)
{
- p->is_connected = 1;
-#if defined (DEBUG)
- fprintf (stderr, "%s: connected\n", __func__);
-#endif
- _do_send (pkt);
- /* Packet will be freed in write callback. */
+ _on_connect (conn);
+ if (_do_send (pkt))
+ rs_debug (("%s: error sending\n", __func__));
+ }
+ else if (events & BEV_EVENT_EOF)
+ {
+ _on_disconnect (conn);
+ }
+ else if (events & BEV_EVENT_TIMEOUT)
+ {
+ rs_debug (("%s: %p times out on %s\n", __func__, p,
+ (events & BEV_EVENT_READING) ? "read" : "write"));
+ rs_err_conn_push_fl (pkt->conn, RSE_TIMEOUT_IO, __FILE__, __LINE__, NULL);
}
else if (events & BEV_EVENT_ERROR)
- rs_conn_err_push_fl (pkt->conn, RSE_CONNERR, __FILE__, __LINE__, NULL);
+ {
+ sockerr = evutil_socket_geterror (conn->active_peer->fd);
+ if (sockerr == 0) /* FIXME: True that errno == 0 means closed? */
+ {
+ _on_disconnect (conn);
+ }
+ else
+ {
+ rs_err_conn_push_fl (pkt->conn, RSE_SOCKERR, __FILE__, __LINE__,
+ "%d: socket error %d (%s)",
+ conn->fd,
+ sockerr,
+ evutil_socket_error_to_string (sockerr));
+ rs_debug (("%s: socket error on fd %d: %s (%d)\n", __func__,
+ conn->fd,
+ evutil_socket_error_to_string (sockerr),
+ sockerr));
+ }
+#if defined (RS_ENABLE_TLS)
+ if (conn->tls_ssl) /* FIXME: correct check? */
+ {
+ for (tlserr = bufferevent_get_openssl_error (conn->bev);
+ tlserr;
+ tlserr = bufferevent_get_openssl_error (conn->bev))
+ {
+ rs_debug (("%s: openssl error: %s\n", __func__,
+ ERR_error_string (tlserr, NULL)));
+ rs_err_conn_push_fl (pkt->conn, RSE_SSLERR, __FILE__, __LINE__,
+ ERR_error_string (tlserr, NULL));
+ }
+ }
+#endif /* RS_ENABLE_TLS */
+ _loopbreak (conn);
+ }
+
+#if defined (DEBUG)
+ if (events & BEV_EVENT_ERROR && events != BEV_EVENT_ERROR)
+ rs_debug (("%s: BEV_EVENT_ERROR and more: 0x%x\n", __func__, events));
+#endif
}
static void
assert (pkt);
assert (pkt->conn);
-#if defined (DEBUG)
- fprintf (stderr, "%s: packet written, breaking event loop\n", __func__);
-#endif
- if (event_base_loopbreak (pkt->conn->evb) < 0)
- abort (); /* FIXME */
- rs_packet_destroy (pkt);
+
+ if (pkt->conn->callbacks.sent_cb)
+ pkt->conn->callbacks.sent_cb (pkt->conn->user_data);
}
-static void
-_read_cb (struct bufferevent *bev, void *ctx)
+/* Read one RADIUS packet header. Return !0 on error. A return value
+ of 0 means that we need more data. */
+static int
+_read_header (struct rs_packet *pkt)
{
- struct rs_packet *pkt = (struct rs_packet *) ctx;
- size_t n;
+ size_t n = 0;
- assert (pkt);
- assert (pkt->conn);
- if (!pkt->hdr_read_flag)
+ n = bufferevent_read (pkt->conn->bev, pkt->hdr, RS_HEADER_LEN);
+ if (n == RS_HEADER_LEN)
{
- n = bufferevent_read (pkt->conn->bev, pkt->hdr, RS_HEADER_LEN);
- if (n == RS_HEADER_LEN)
+ pkt->hdr_read_flag = 1;
+ pkt->rpkt->data_len = (pkt->hdr[2] << 8) + pkt->hdr[3];
+ if (pkt->rpkt->data_len < 20 || pkt->rpkt->data_len > 4096)
{
- pkt->hdr_read_flag = 1;
- pkt->rpkt->data_len = (pkt->hdr[2] << 8) + pkt->hdr[3];
- if (pkt->rpkt->data_len < 20 /* || len > 4096 */)
- abort (); /* FIXME: Read and discard packet. */
- pkt->rpkt->data = rs_malloc (pkt->conn->ctx, pkt->rpkt->data_len);
- if (!pkt->rpkt->data)
- {
- rs_conn_err_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
- NULL);
- abort (); /* FIXME: Read and discard packet. */
- }
- memcpy (pkt->rpkt->data, pkt->hdr, RS_HEADER_LEN);
- bufferevent_setwatermark (pkt->conn->bev, EV_READ,
- pkt->rpkt->data_len - RS_HEADER_LEN, 0);
-#if defined (DEBUG)
- fprintf (stderr, "%s: packet header read, total pkt len=%d\n",
- __func__, pkt->rpkt->data_len);
-#endif
+ bufferevent_free (pkt->conn->bev); /* Close connection. */
+ return rs_err_conn_push (pkt->conn, RSE_INVALID_PKT,
+ "invalid packet length: %d",
+ pkt->rpkt->data_len);
}
- else if (n < 0)
- return; /* Buffer frozen. */
- else
- assert (!"short header");
+ pkt->rpkt->data = rs_malloc (pkt->conn->ctx, pkt->rpkt->data_len);
+ if (!pkt->rpkt->data)
+ {
+ bufferevent_free (pkt->conn->bev); /* Close connection. */
+ return rs_err_conn_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
+ NULL);
+ }
+ memcpy (pkt->rpkt->data, pkt->hdr, RS_HEADER_LEN);
+ bufferevent_setwatermark (pkt->conn->bev, EV_READ,
+ pkt->rpkt->data_len - RS_HEADER_LEN, 0);
+ rs_debug (("%s: packet header read, total pkt len=%d\n",
+ __func__, pkt->rpkt->data_len));
+ }
+ else if (n < 0)
+ {
+ rs_debug (("%s: buffer frozen while reading header\n", __func__));
+ }
+ else /* Error: libevent gave us less than the low watermark. */
+ {
+ bufferevent_free (pkt->conn->bev); /* Close connection. */
+ return rs_err_conn_push_fl (pkt->conn, RSE_INTERNAL, __FILE__, __LINE__,
+ "got %d octets reading header", n);
}
-#if defined (DEBUG)
- printf ("%s: trying to read %d octets of packet data\n", __func__, pkt->rpkt->data_len - RS_HEADER_LEN);
-#endif
- n = bufferevent_read (pkt->conn->bev, pkt->rpkt->data + RS_HEADER_LEN, pkt->rpkt->data_len - RS_HEADER_LEN);
-#if defined (DEBUG)
- printf ("%s: read %d octets of packet data\n", __func__, n);
-#endif
+ return 0;
+}
+
+static int
+_read_packet (struct rs_packet *pkt)
+{
+ size_t n = 0;
+
+ rs_debug (("%s: trying to read %d octets of packet data\n", __func__,
+ pkt->rpkt->data_len - RS_HEADER_LEN));
+
+ n = bufferevent_read (pkt->conn->bev,
+ pkt->rpkt->data + RS_HEADER_LEN,
+ pkt->rpkt->data_len - RS_HEADER_LEN);
+
+ rs_debug (("%s: read %ld octets of packet data\n", __func__, n));
+
if (n == pkt->rpkt->data_len - RS_HEADER_LEN)
{
bufferevent_disable (pkt->conn->bev, EV_READ);
+ rs_debug (("%s: complete packet read\n", __func__));
pkt->hdr_read_flag = 0;
memset (pkt->hdr, 0, sizeof(*pkt->hdr));
+
+ /* Checks done by rad_packet_ok:
+ - lenghts (FIXME: checks really ok for tcp?)
+ - invalid code field
+ - attribute lengths >= 2
+ - attribute sizes adding up correctly */
+ if (!rad_packet_ok (pkt->rpkt, 0) != 0)
+ {
+ bufferevent_free (pkt->conn->bev); /* Close connection. */
+ return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
+ "invalid packet: %s", fr_strerror ());
+ }
+
+ /* TODO: Verify that reception of an unsolicited response packet
+ results in connection being closed. */
+
+ /* If we have a request to match this response against, verify
+ and decode the response. */
+ if (pkt->original)
+ {
+ /* Verify header and message authenticator. */
+ if (rad_verify (pkt->rpkt, pkt->original->rpkt,
+ pkt->conn->active_peer->secret))
+ {
+ bufferevent_free (pkt->conn->bev); /* Close connection. */
+ return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
+ "rad_verify: %s", fr_strerror ());
+ }
+
+ /* Decode and decrypt. */
+ if (rad_decode (pkt->rpkt, pkt->original->rpkt,
+ pkt->conn->active_peer->secret))
+ {
+ bufferevent_free (pkt->conn->bev); /* Close connection. */
+ return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
+ "rad_decode: %s", fr_strerror ());
+ }
+ }
+
#if defined (DEBUG)
- fprintf (stderr, "%s: complete packet read\n", __func__);
+ /* Find out what happens if there's data left in the buffer. */
+ {
+ size_t rest = 0;
+ rest = evbuffer_get_length (bufferevent_get_input (pkt->conn->bev));
+ if (rest)
+ rs_debug (("%s: returning with %d octets left in buffer\n", __func__,
+ rest));
+ }
#endif
- rad_decode (pkt->rpkt, NULL, pkt->conn->active_peer->secret);
- if (event_base_loopbreak (pkt->conn->evb) < 0)
- abort (); /* FIXME */
+
+ /* Hand over message to user, changes ownership of pkt. Don't
+ touch it afterwards -- it might have been freed. */
+ if (pkt->conn->callbacks.received_cb)
+ pkt->conn->callbacks.received_cb (pkt, pkt->conn->user_data);
}
- else if (n < 0)
- return; /* Buffer frozen. */
- else
- assert (!"short packet");
+ else if (n < 0) /* Buffer frozen. */
+ rs_debug (("%s: buffer frozen when reading packet\n", __func__));
+ else /* Short packet. */
+ rs_debug (("%s: waiting for another %d octets\n", __func__,
+ pkt->rpkt->data_len - RS_HEADER_LEN - n));
+
+ return 0;
+}
+
+/* Read callback for TCP.
+
+ Read exactly one RADIUS message from BEV and store it in struct
+ rs_packet passed in CTX (hereby called 'pkt').
+
+ Verify the received packet against pkt->original, if !NULL.
+
+ Inform upper layer about successful reception of valid RADIUS
+ message by invoking conn->callbacks.recevied_cb(), if !NULL. */
+static void
+_read_cb (struct bufferevent *bev, void *user_data)
+{
+ struct rs_packet *pkt = (struct rs_packet *) user_data;
+
+ assert (pkt);
+ assert (pkt->conn);
+ assert (pkt->rpkt);
+
+ pkt->rpkt->sockfd = pkt->conn->fd;
+ pkt->rpkt->vps = NULL;
+
+ if (!pkt->hdr_read_flag)
+ if (_read_header (pkt))
+ return;
+ _read_packet (pkt);
}
-#if defined (DEBUG)
static void
_evlog_cb (int severity, const char *msg)
{
switch (severity)
{
case _EVENT_LOG_DEBUG:
+#if !defined (DEBUG_LEVENT)
+ return;
+#endif
sevstr = "debug";
break;
case _EVENT_LOG_MSG:
sevstr = "???";
break;
}
- fprintf (stderr, "libevent: [%s] %s\n", sevstr, msg);
+ fprintf (stderr, "libevent: [%s] %s\n", sevstr, msg); /* FIXME: stderr? */
}
-#endif /* DEBUG */
static int
_init_evb (struct rs_connection *conn)
{
- if (!conn->evb)
- {
+ if (conn->evb)
+ return RSE_OK;
+
#if defined (DEBUG)
- event_enable_debug_mode ();
- event_set_log_callback (_evlog_cb);
+ event_enable_debug_mode ();
#endif
- conn->evb = event_base_new ();
- if (!conn->evb)
- return rs_conn_err_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
- "event_base_new");
- }
+ event_set_log_callback (_evlog_cb);
+ conn->evb = event_base_new ();
+ if (!conn->evb)
+ return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
+ "event_base_new");
+
return RSE_OK;
}
static int
_init_socket (struct rs_connection *conn, struct rs_peer *p)
{
- if (p->fd != -1)
+ if (conn->fd != -1)
return RSE_OK;
assert (p->addr);
- p->fd = socket (p->addr->ai_family, p->addr->ai_socktype,
- p->addr->ai_protocol);
- if (p->fd < 0)
- return rs_conn_err_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
- strerror (errno));
- if (evutil_make_socket_nonblocking (p->fd) < 0)
+ conn->fd = socket (p->addr->ai_family, p->addr->ai_socktype,
+ p->addr->ai_protocol);
+ if (conn->fd < 0)
+ return rs_err_conn_push_fl (conn, RSE_SOCKERR, __FILE__, __LINE__,
+ "socket: %d (%s)",
+ errno, strerror (errno));
+ if (evutil_make_socket_nonblocking (conn->fd) < 0)
{
- evutil_closesocket (p->fd);
- return rs_conn_err_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
- strerror (errno));
+ evutil_closesocket (conn->fd);
+ conn->fd = -1;
+ return rs_err_conn_push_fl (conn, RSE_SOCKERR, __FILE__, __LINE__,
+ "evutil_make_socket_nonblocking: %d (%s)",
+ errno, strerror (errno));
}
return RSE_OK;
}
static struct rs_peer *
_pick_peer (struct rs_connection *conn)
{
+ assert (conn);
+
+ if (conn->active_peer)
+ conn->active_peer = conn->active_peer->next; /* Next. */
if (!conn->active_peer)
- conn->active_peer = conn->peers;
+ conn->active_peer = conn->peers; /* From the top. */
+
return conn->active_peer;
}
+static void
+_conn_timeout_cb (int fd, short event, void *data)
+{
+ struct rs_connection *conn;
+
+ assert (data);
+ conn = (struct rs_connection *) data;
+
+ if (event & EV_TIMEOUT)
+ {
+ rs_debug (("%s: connection timeout on %p (fd %d) connecting to %p\n",
+ __func__, conn, conn->fd, conn->active_peer));
+ conn->is_connecting = 0;
+ rs_err_conn_push_fl (conn, RSE_TIMEOUT_IO, __FILE__, __LINE__, NULL);
+ _loopbreak (conn);
+ }
+}
+static int
+_set_timeout (struct rs_connection *conn)
+{
+ struct timeval tv;
+
+ if (!conn->tev)
+ conn->tev = evtimer_new (conn->evb, _conn_timeout_cb, conn);
+ if (!conn->tev)
+ return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
+ "evtimer_new");
+ tv.tv_sec = conn->realm->timeout;
+ tv.tv_usec = 0;
+ evtimer_add (conn->tev, &tv);
+
+ return RSE_OK;
+}
+
static int
_init_bev (struct rs_connection *conn, struct rs_peer *peer)
{
- if (!conn->bev)
+ if (conn->bev)
+ return RSE_OK;
+
+ switch (conn->realm->type)
{
- conn->bev = bufferevent_socket_new (conn->evb, peer->fd, 0);
+ case RS_CONN_TYPE_UDP:
+ /* Fall through. */
+ /* NOTE: We know this is wrong for several reasons, most notably
+ because libevent doesn't work as expected with UDP. The
+ timeout handling is wrong too. */
+ case RS_CONN_TYPE_TCP:
+ conn->bev = bufferevent_socket_new (conn->evb, conn->fd, 0);
if (!conn->bev)
- return rs_conn_err_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
+ return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
"bufferevent_socket_new");
+ break;
+
+#if defined (RS_ENABLE_TLS)
+ case RS_CONN_TYPE_TLS:
+ if (rs_tls_init (conn))
+ return -1;
+ /* Would be convenient to pass BEV_OPT_CLOSE_ON_FREE but things
+ seem to break when be_openssl_ctrl() (in libevent) calls
+ SSL_set_bio() after BIO_new_socket() with flag=1. */
+ conn->bev =
+ bufferevent_openssl_socket_new (conn->evb, conn->fd, conn->tls_ssl,
+ BUFFEREVENT_SSL_CONNECTING, 0);
+ if (!conn->bev)
+ return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
+ "bufferevent_openssl_socket_new");
+ break;
+
+ case RS_CONN_TYPE_DTLS:
+ return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__, NULL);
+#endif /* RS_ENABLE_TLS */
+
+ default:
+ return rs_err_conn_push_fl (conn, RSE_INTERNAL, __FILE__, __LINE__,
+ "%s: unknown connection type: %d", __func__,
+ conn->realm->type);
}
+
return RSE_OK;
}
static void
-_do_connect (struct rs_peer *p)
+_do_connect (struct rs_connection *conn)
{
+ struct rs_peer *p;
int err;
+ assert (conn);
+ assert (conn->active_peer);
+ p = conn->active_peer;
+
+#if defined (DEBUG)
+ {
+ char host[80], serv[80];
+
+ getnameinfo (p->addr->ai_addr,
+ p->addr->ai_addrlen,
+ host, sizeof(host), serv, sizeof(serv),
+ 0 /* NI_NUMERICHOST|NI_NUMERICSERV*/);
+ rs_debug (("%s: connecting to %s:%s\n", __func__, host, serv));
+ }
+#endif
+
+ _set_timeout (conn);
err = bufferevent_socket_connect (p->conn->bev, p->addr->ai_addr,
p->addr->ai_addrlen);
if (err < 0)
- rs_conn_err_push_fl (p->conn, RSE_EVENT, __FILE__, __LINE__,
+ rs_err_conn_push_fl (p->conn, RSE_EVENT, __FILE__, __LINE__,
"bufferevent_socket_connect: %s",
- evutil_gai_strerror(err));
+ evutil_gai_strerror (err));
else
- p->is_connecting = 1;
+ p->conn->is_connecting = 1;
}
static int
_conn_open(struct rs_connection *conn, struct rs_packet *pkt)
{
- struct rs_peer *p;
-
if (_init_evb (conn))
return -1;
- p = _pick_peer (conn);
- if (!p)
- return rs_conn_err_push_fl (conn, RSE_NOPEER, __FILE__, __LINE__, NULL);
+ if (!conn->active_peer)
+ _pick_peer (conn);
+ if (!conn->active_peer)
+ return rs_err_conn_push_fl (conn, RSE_NOPEER, __FILE__, __LINE__, NULL);
- if (_init_socket (conn, p))
+ if (_init_socket (conn, conn->active_peer))
return -1;
- if (_init_bev (conn, p))
+ if (_init_bev (conn, conn->active_peer))
return -1;
- if (!p->is_connected)
- if (!p->is_connecting)
- _do_connect (p);
+ if (!conn->is_connected)
+ if (!conn->is_connecting)
+ _do_connect (conn);
return RSE_OK;
}
static int
_conn_is_open_p (struct rs_connection *conn)
{
- return conn->active_peer && conn->active_peer->is_connected;
+ return conn->active_peer && conn->is_connected;
}
/* Public functions. */
int
-rs_packet_create_acc_request (struct rs_connection *conn,
- struct rs_packet **pkt_out,
- const char *user_name, const char *user_pw)
+rs_packet_create (struct rs_connection *conn, struct rs_packet **pkt_out)
+{
+ struct rs_packet *p;
+ RADIUS_PACKET *rpkt;
+
+ *pkt_out = NULL;
+
+ rpkt = rad_alloc (1);
+ if (!rpkt)
+ return rs_err_conn_push (conn, RSE_NOMEM, __func__);
+ rpkt->id = conn->nextid++;
+
+ p = (struct rs_packet *) malloc (sizeof (struct rs_packet));
+ if (!p)
+ {
+ rad_free (&rpkt);
+ return rs_err_conn_push (conn, RSE_NOMEM, __func__);
+ }
+ memset (p, 0, sizeof (struct rs_packet));
+ p->conn = conn;
+ p->rpkt = rpkt;
+
+ *pkt_out = p;
+ return RSE_OK;
+}
+
+int
+rs_packet_create_authn_request (struct rs_connection *conn,
+ struct rs_packet **pkt_out,
+ const char *user_name, const char *user_pw)
{
struct rs_packet *pkt;
struct rs_attr *attr;
- if (_packet_create (conn, pkt_out))
+ if (rs_packet_create (conn, pkt_out))
return -1;
pkt = *pkt_out;
pkt->rpkt->code = PW_AUTHENTICATION_REQUEST;
- if (rs_attr_create (conn, &attr, "User-Name", user_name))
- return -1;
- rs_packet_add_attr (pkt, attr);
+ if (user_name)
+ {
+ if (rs_attr_create (conn, &attr, "User-Name", user_name))
+ return -1;
+ rs_packet_add_attr (pkt, attr);
- if (rs_attr_create (conn, &attr, "User-Password", user_pw))
- return -1;
- /* FIXME: need this too? rad_pwencode(user_pw, &pwlen, SECRET, reqauth) */
- rs_packet_add_attr (pkt, attr);
+ if (user_pw)
+ {
+ if (rs_attr_create (conn, &attr, "User-Password", user_pw))
+ return -1;
+ rs_packet_add_attr (pkt, attr);
+ }
+ }
return RSE_OK;
}
+/* User callback used when we're dispatching for user. */
+static void
+_wcb (void *user_data)
+{
+ struct rs_packet *pkt = (struct rs_packet *) user_data;
+ assert (pkt);
+ pkt->written_flag = 1;
+ bufferevent_disable (pkt->conn->bev, EV_WRITE|EV_READ);
+}
+
int
rs_packet_send (struct rs_packet *pkt, void *user_data)
{
- struct rs_connection *conn;
+ struct rs_connection *conn = NULL;
+ int err = 0;
+
assert (pkt);
+ assert (pkt->conn);
conn = pkt->conn;
if (_conn_is_open_p (conn))
assert (conn->evb);
assert (conn->bev);
assert (conn->active_peer);
- assert (conn->active_peer->fd >= 0);
+ assert (conn->fd >= 0);
- if (conn->callbacks.connected_cb || conn->callbacks.disconnected_cb
- || conn->callbacks.received_cb || conn->callbacks.sent_cb)
- ; /* FIXME: install event callbacks, other than below */
- else
+ conn->user_data = user_data;
+ bufferevent_setcb (conn->bev, NULL, _write_cb, _event_cb, pkt);
+ bufferevent_enable (conn->bev, EV_WRITE);
+
+ /* Do dispatch, unless the user wants to do it herself. */
+ if (!conn->user_dispatch_flag)
{
- bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
- event_base_dispatch (conn->evb);
+ conn->callbacks.sent_cb = _wcb;
+ conn->user_data = pkt;
+ rs_debug (("%s: entering event loop\n", __func__));
+ err = event_base_dispatch (conn->evb);
+ if (err < 0)
+ return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
+ "event_base_dispatch: %s",
+ evutil_gai_strerror (err));
+ rs_debug (("%s: event loop done\n", __func__));
+ conn->callbacks.sent_cb = NULL;
+ conn->user_data = NULL;
+
+ if (!pkt->written_flag)
+ return -1;
}
-#if defined (DEBUG)
- fprintf (stderr, "%s: event loop done\n", __func__);
- assert (event_base_got_break(conn->evb));
-#endif
-
return RSE_OK;
}
+static void
+_rcb (struct rs_packet *packet, void *user_data)
+{
+ struct rs_packet *pkt = (struct rs_packet *) user_data;
+ assert (pkt);
+ pkt->valid_flag = 1;
+ bufferevent_disable (pkt->conn->bev, EV_WRITE|EV_READ);
+}
+
+/* Special function used in libradsec blocking dispatching mode,
+ i.e. with socket set to block on read/write and with no libradsec
+ callbacks registered.
+
+ For any other use of libradsec, a the received_cb callback should
+ be registered in the callbacks member of struct rs_connection.
+
+ On successful reception, verification and decoding of a RADIUS
+ message, PKT_OUT will upon return point at a pointer to a struct
+ rs_packet containing the message.
+
+ If anything goes wrong or if the read times out (TODO: explain),
+ PKT_OUT will point at the NULL pointer and one or more errors are
+ pushed on the connection (available through rs_err_conn_pop()). */
+
int
-rs_conn_receive_packet (struct rs_connection *conn, struct rs_packet **pkt_out)
+rs_conn_receive_packet (struct rs_connection *conn,
+ struct rs_packet *request,
+ struct rs_packet **pkt_out)
{
- struct rs_packet *pkt;
+ int err = 0;
+ struct rs_packet *pkt = NULL;
assert (conn);
+ assert (conn->realm);
+ assert (!conn->user_dispatch_flag); /* Dispatching mode only. */
- if (_packet_create (conn, pkt_out))
+ if (rs_packet_create (conn, pkt_out))
return -1;
pkt = *pkt_out;
pkt->conn = conn;
+ pkt->original = request;
- if (_conn_open (conn, pkt))
- return -1;
assert (conn->evb);
assert (conn->bev);
assert (conn->active_peer);
- assert (conn->active_peer->fd >= 0);
+ assert (conn->fd >= 0);
bufferevent_setwatermark (conn->bev, EV_READ, RS_HEADER_LEN, 0);
+ bufferevent_setcb (conn->bev, _read_cb, NULL, _event_cb, pkt);
bufferevent_enable (conn->bev, EV_READ);
- event_base_dispatch (conn->evb);
+ conn->callbacks.received_cb = _rcb;
+ conn->user_data = pkt;
+
+ /* Dispatch. */
+ rs_debug (("%s: entering event loop\n", __func__));
+ err = event_base_dispatch (conn->evb);
+ conn->callbacks.received_cb = NULL;
+ if (err < 0)
+ return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
+ "event_base_dispatch: %s",
+ evutil_gai_strerror (err));
+ rs_debug (("%s: event loop done\n", __func__));
+
+ if (!pkt->valid_flag)
+ return -1;
+
#if defined (DEBUG)
- fprintf (stderr, "%s: event loop done", __func__);
- if (event_base_got_break(conn->evb))
- {
- fprintf (stderr, ", got this:\n");
rs_dump_packet (pkt);
- }
- else
- fprintf (stderr, ", no reply\n");
#endif
+ pkt->original = NULL; /* FIXME: Why? */
return RSE_OK;
}
void
-rs_packet_add_attr(struct rs_packet *pkt, struct rs_attr *attr)
+rs_packet_add_attr (struct rs_packet *pkt, struct rs_attr *attr)
{
pairadd (&pkt->rpkt->vps, attr->vp);
attr->pkt = pkt;
}
struct radius_packet *
-rs_packet_frpkt(struct rs_packet *pkt)
+rs_packet_frpkt (struct rs_packet *pkt)
{
assert (pkt);
return pkt->rpkt;
}
void
-rs_packet_destroy(struct rs_packet *pkt)
+rs_packet_destroy (struct rs_packet *pkt)
{
if (pkt)
{
+ // FIXME: memory leak! TODO: free all attributes
rad_free (&pkt->rpkt);
rs_free (pkt->conn->ctx, pkt);
}
projects / radsecproxy.git / blobdiff