-/* See the file COPYING for licensing information. */
+/* Copyright 2010, 2011 NORDUnet A/S. All rights reserved.
+ See the file COPYING for licensing information. */
#if defined HAVE_CONFIG_H
#include <config.h>
#endif
-#include <stdlib.h>
-#include <string.h>
#include <assert.h>
-#include <freeradius/libradius.h>
-#include <event2/event.h>
#include <event2/bufferevent.h>
-#if defined RS_ENABLE_TLS
-#include <event2/bufferevent_ssl.h>
-#include <openssl/err.h>
-#endif
#include <radsec/radsec.h>
#include <radsec/radsec-impl.h>
-#include "tls.h"
-#if defined DEBUG
+#include "conn.h"
+#include "debug.h"
+#include "packet.h"
+
+#if defined (DEBUG)
#include <netdb.h>
#include <sys/socket.h>
-#include "debug.h"
+#include <event2/buffer.h>
#endif
-static int
-_do_send (struct rs_packet *pkt)
+int
+packet_verify_response (struct rs_connection *conn,
+ struct rs_packet *response,
+ struct rs_packet *request)
{
- int err;
- VALUE_PAIR *vp;
+ assert (conn);
+ assert (conn->active_peer);
+ assert (conn->active_peer->secret);
+ assert (response);
+ assert (response->rpkt);
+ assert (request);
+ assert (request->rpkt);
+
+ /* Verify header and message authenticator. */
+ if (rad_verify (response->rpkt, request->rpkt, conn->active_peer->secret))
+ {
+ conn_close (&conn);
+ return rs_err_conn_push_fl (conn, RSE_FR, __FILE__, __LINE__,
+ "rad_verify: %s", fr_strerror ());
+ }
+
+ /* Decode and decrypt. */
+ if (rad_decode (response->rpkt, request->rpkt, conn->active_peer->secret))
+ {
+ conn_close (&conn);
+ return rs_err_conn_push_fl (conn, RSE_FR, __FILE__, __LINE__,
+ "rad_decode: %s", fr_strerror ());
+ }
+
+ return RSE_OK;
+}
+
+
+/* Badly named function for preparing a RADIUS message and queue it.
+ FIXME: Rename. */
+int
+packet_do_send (struct rs_packet *pkt)
+{
+ VALUE_PAIR *vp = NULL;
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_NOMEM, __FILE__, __LINE__,
+ return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
"paircreate: %s", fr_strerror ());
pairadd (&pkt->rpkt->vps, vp);
pkt->conn->active_peer->addr->ai_addrlen,
host, sizeof(host), serv, sizeof(serv),
0 /* NI_NUMERICHOST|NI_NUMERICSERV*/);
- rs_debug ("%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)
- return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
- "bufferevent_write: %s",
- evutil_gai_strerror(err));
- return RSE_OK;
-}
-
-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;
-#if defined RS_ENABLE_TLS
- unsigned long err;
-#endif
-
- assert (pkt);
- assert (pkt->conn);
- assert (pkt->conn->active_peer);
- conn = pkt->conn;
- p = conn->active_peer;
-
- p->is_connecting = 0;
- if (events & BEV_EVENT_CONNECTED)
- {
- p->is_connected = 1;
- if (conn->callbacks.connected_cb)
- conn->callbacks.connected_cb (conn->user_data);
- rs_debug ("%s: connected\n", __func__);
- if (_do_send (pkt))
- return;
- if (conn->callbacks.sent_cb)
- conn->callbacks.sent_cb (conn->user_data);
- /* Packet will be freed in write callback. */
- }
- else if (events & BEV_EVENT_ERROR)
- {
-#if defined RS_ENABLE_TLS
- if (conn->tls_ssl) /* FIXME: correct check? */
- {
- for (err = bufferevent_get_openssl_error (conn->bev);
- err;
- err = bufferevent_get_openssl_error (conn->bev))
- {
- fprintf (stderr, "%s: DEBUG: openssl error: %s\n", __func__,
- ERR_error_string (err, NULL)); /* FIXME: DEBUG, until verified that pushed errors will actually be handled */
- rs_err_conn_push_fl (pkt->conn, RSE_SSLERR, __FILE__, __LINE__,
- "%d", err);
- }
- }
-#endif /* RS_ENABLE_TLS */
-
- rs_err_conn_push_fl (pkt->conn, RSE_CONNERR, __FILE__, __LINE__, NULL);
- fprintf (stderr, "%s: DEBUG: BEV_EVENT_ERROR\n", __func__); /* FIXME: DEBUG, until verified that pushed errors will actually be handled */
- }
-}
-
-static void
-_write_cb (struct bufferevent *bev, void *ctx)
-{
- struct rs_packet *pkt = (struct rs_packet *) ctx;
- int err;
-
- assert (pkt);
- assert (pkt->conn);
-
- rs_debug ("%s: packet written, breaking event loop\n", __func__);
- err = event_base_loopbreak (pkt->conn->evb);
- if (err < 0)
- rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
- "event_base_loopbreak: %s",
- evutil_gai_strerror(err));
-}
-
-static void
-_read_cb (struct bufferevent *bev, void *ctx)
-{
- struct rs_packet *pkt = (struct rs_packet *)ctx;
- int err;
- size_t n;
-
- assert (pkt);
- assert (pkt->conn);
- assert (pkt->rpkt);
-
- pkt->rpkt->sockfd = pkt->conn->active_peer->fd; /* FIXME: Why? */
- pkt->rpkt->vps = NULL; /* FIXME: Why? */
-
- if (!pkt->hdr_read_flag)
+ if (pkt->conn->bev) /* TCP. */
{
- 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 /* || len > 4096 */)
- abort (); /* FIXME: Read and discard invalid packet. */
- pkt->rpkt->data = rs_malloc (pkt->conn->ctx, pkt->rpkt->data_len);
- if (!pkt->rpkt->data)
- {
- rs_err_conn_push_fl (pkt->conn, RSE_NOMEM, __FILE__, __LINE__,
- NULL);
- abort (); /* FIXME: handle ENOMEM. */
- }
- 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)
- return; /* Buffer frozen. FIXME: Properly handled above? */
- else
- {
- assert (!"short header");
- abort (); /* FIXME: handle short header */
- }
- }
-
- 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));
- if (!rad_packet_ok (pkt->rpkt, 0) != 0)
- {
- rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
- "rad_packet_ok: %s", fr_strerror ());
- return;
- }
- assert (pkt->original); /* FIXME: where's the bug if this fires? */
-
- /* Verify header and message authenticator. */
- if (rad_verify (pkt->rpkt, pkt->original->rpkt,
- pkt->conn->active_peer->secret))
- {
- rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
- "rad_verify: %s", fr_strerror ());
- return;
- }
-
- /* Decode and decrypt. */
- if (rad_decode (pkt->rpkt, pkt->original->rpkt,
- pkt->conn->active_peer->secret))
- {
- rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
- "rad_decode: %s", fr_strerror ());
- return;
- }
-
- if (pkt->conn->callbacks.received_cb)
- pkt->conn->callbacks.received_cb (pkt, pkt->conn->user_data);
-
- err = event_base_loopbreak (pkt->conn->evb);
+ int err = bufferevent_write (pkt->conn->bev, pkt->rpkt->data,
+ pkt->rpkt->data_len);
if (err < 0)
- {
- rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
- "event_base_loopbreak: %s",
- evutil_gai_strerror(err));
- return;
- }
- }
- else if (n < 0)
- return; /* Buffer frozen. FIXME: Properly handled? */
- else
- {
- assert (!"short packet");
- abort (); /* FIXME: handle short packet */
- }
-}
-
-static void
-_evlog_cb (int severity, const char *msg)
-{
- const char *sevstr;
- switch (severity)
- {
- case _EVENT_LOG_DEBUG:
-#if !defined (DEBUG_LEVENT)
- return;
-#endif
- sevstr = "debug";
- break;
- case _EVENT_LOG_MSG:
- sevstr = "msg";
- break;
- case _EVENT_LOG_WARN:
- sevstr = "warn";
- break;
- case _EVENT_LOG_ERR:
- sevstr = "err";
- break;
- default:
- sevstr = "???";
- break;
- }
- fprintf (stderr, "libevent: [%s] %s\n", sevstr, msg); /* FIXME: stderr? */
-}
-
-static int
-_init_evb (struct rs_connection *conn)
-{
- if (!conn->evb)
- {
-#if defined (DEBUG)
- event_enable_debug_mode ();
-#endif
- 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 rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
+ "bufferevent_write: %s",
+ evutil_gai_strerror (err));
}
- return RSE_OK;
-}
-
-static int
-_init_socket (struct rs_connection *conn, struct rs_peer *p)
-{
- if (p->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_err_conn_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
- strerror (errno));
- if (evutil_make_socket_nonblocking (p->fd) < 0)
+ else /* UDP. */
{
- evutil_closesocket (p->fd);
- return rs_err_conn_push_fl (conn, RSE_SOME_ERROR, __FILE__, __LINE__,
- strerror (errno));
- }
- return RSE_OK;
-}
+ struct rs_packet **pp = &pkt->conn->out_queue;
-static struct rs_peer *
-_pick_peer (struct rs_connection *conn)
-{
- if (!conn->active_peer)
- conn->active_peer = conn->peers;
- return conn->active_peer;
-}
-
-static int
-_init_bev (struct rs_connection *conn, struct rs_peer *peer)
-{
- if (conn->bev)
- return RSE_OK;
-
- switch (conn->type)
- {
- case RS_CONN_TYPE_UDP:
- case RS_CONN_TYPE_TCP:
- conn->bev = bufferevent_socket_new (conn->evb, peer->fd, 0);
- if (!conn->bev)
- 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, peer->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");
+ while (*pp && (*pp)->next)
+ *pp = (*pp)->next;
+ *pp = pkt;
- break;
- case RS_CONN_TYPE_DTLS:
- return rs_err_conn_push_fl (conn, RSE_NOSYS, __FILE__, __LINE__,
- "%s: NYI", __func__);
-#endif /* RS_ENABLE_TLS */
- default:
- return rs_err_conn_push_fl (conn, RSE_INTERNAL, __FILE__, __LINE__,
- "%s: unknown connection type: %d", __func__,
- conn->type);
+ conn_activate_timeout (pkt->conn); /* Retransmission timer. */
}
return RSE_OK;
}
-static void
-_do_connect (struct rs_peer *p)
-{
- int err;
-
- err = bufferevent_socket_connect (p->conn->bev, p->addr->ai_addr,
- p->addr->ai_addrlen);
- if (err < 0)
- rs_err_conn_push_fl (p->conn, RSE_EVENT, __FILE__, __LINE__,
- "bufferevent_socket_connect: %s",
- evutil_gai_strerror(err));
- else
- p->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_err_conn_push_fl (conn, RSE_NOPEER, __FILE__, __LINE__, NULL);
-
- if (_init_socket (conn, p))
- return -1;
-
- if (_init_bev (conn, p))
- return -1;
-
- if (!p->is_connected)
- if (!p->is_connecting)
- _do_connect (p);
-
- return RSE_OK;
-}
-
-static int
-_conn_is_open_p (struct rs_connection *conn)
-{
- return conn->active_peer && conn->active_peer->is_connected;
-}
-
/* Public functions. */
int
rs_packet_create (struct rs_connection *conn, struct rs_packet **pkt_out)
}
int
-rs_packet_create_auth_request (struct rs_connection *conn,
- struct rs_packet **pkt_out,
- const char *user_name, const char *user_pw)
+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;
return RSE_OK;
}
-int
-rs_packet_send (struct rs_packet *pkt, void *user_data)
-{
- struct rs_connection *conn;
- int err;
-
- assert (pkt);
- conn = pkt->conn;
-
- if (_conn_is_open_p (conn))
- _do_send (pkt);
- else
- if (_conn_open (conn, pkt))
- return RSE_SOME_ERROR; /* FIXME */
-
- assert (conn->evb);
- assert (conn->bev);
- assert (conn->active_peer);
- assert (conn->active_peer->fd >= 0);
-
- conn->user_data = user_data;
- bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
- if (!conn->user_dispatch_flag)
- {
- 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__);
- if (!event_base_got_break(conn->evb))
- {
- /* Something went wrong -- we never reached loopbreak in
- _write_cb(). FIXME: Pull error/errors? */
- return RSE_SOME_ERROR; /* FIXME */
- }
- }
-
- return RSE_OK;
-}
-
-int
-rs_conn_receive_packet (struct rs_connection *conn,
- struct rs_packet *request,
- struct rs_packet **pkt_out)
-{
- struct rs_packet *pkt;
-
- assert (conn);
-
- 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);
-
- bufferevent_setwatermark (conn->bev, EV_READ, RS_HEADER_LEN, 0);
- bufferevent_enable (conn->bev, EV_READ);
- bufferevent_setcb (conn->bev, _read_cb, _write_cb, _event_cb, pkt);
-
- /* Do dispatch, unless the user wants to do it herself. */
- if (!conn->user_dispatch_flag)
- {
- event_base_dispatch (conn->evb);
- rs_debug ("%s: event loop done", __func__);
- if (event_base_got_break (conn->evb))
- {
- rs_debug (", got this:\n");
-#if defined DEBUG
- rs_dump_packet (pkt);
-#endif
- }
- else
- {
- rs_debug (", no reply\n");
- /* Something went wrong -- we never reached loopbreak in
- _read_cb(). FIXME: Pull error/errors? */
- return RSE_SOME_ERROR; /* FIXME */
- }
- }
-
- pkt->original = NULL;
-
- 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)
{
rs_free (pkt->conn->ctx, pkt);
}
}
+
projects / radsecproxy.git / blobdiff