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/* Copyright 2011 NORDUnet A/S. All rights reserved.
See the file COPYING for licensing information. */
#if defined HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.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 "tcp.h"
#include "udp.h"
#if defined (RS_ENABLE_TLS)
#include "tls.h"
#endif
#include "event.h"
#include "packet.h"
#include "conn.h"
#include "debug.h"
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? */
}
void
event_conn_timeout_cb (int fd, short event, void *data)
{
struct rs_connection *conn = NULL;
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_CONN, __FILE__, __LINE__, NULL);
event_loopbreak (conn);
}
}
void
event_retransmit_timeout_cb (int fd, short event, void *data)
{
struct rs_connection *conn = NULL;
assert (data);
conn = (struct rs_connection *) data;
if (event & EV_TIMEOUT)
{
rs_debug (("%s: retransmission timeout on %p (fd %d) sending to %p\n",
__func__, conn, conn->fd, conn->active_peer));
rs_err_conn_push_fl (conn, RSE_TIMEOUT_IO, __FILE__, __LINE__, NULL);
event_loopbreak (conn);
}
}
int
event_init_socket (struct rs_connection *conn, struct rs_peer *p)
{
if (conn->fd != -1)
return RSE_OK;
assert (p->addr);
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 (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;
}
int
event_init_bufferevent (struct rs_connection *conn, struct rs_peer *peer)
{
if (conn->bev)
return RSE_OK;
if (conn->realm->type == RS_CONN_TYPE_TCP)
{
conn->bev = bufferevent_socket_new (conn->evb, conn->fd, 0);
if (!conn->bev)
return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
"bufferevent_socket_new");
}
#if defined (RS_ENABLE_TLS)
else if (conn->realm->type == 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");
}
#endif /* RS_ENABLE_TLS */
else
{
return rs_err_conn_push_fl (conn, RSE_INTERNAL, __FILE__, __LINE__,
"%s: unknown connection type: %d", __func__,
conn->realm->type);
}
return RSE_OK;
}
void
event_do_connect (struct rs_connection *conn)
{
struct rs_peer *p;
int err, sockerr;
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
if (p->conn->bev) /* TCP */
{
conn_activate_timeout (conn); /* Connect timeout. */
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->conn->is_connecting = 1;
}
else /* UDP */
{
err = connect (p->conn->fd, p->addr->ai_addr, p->addr->ai_addrlen);
if (err < 0)
{
sockerr = evutil_socket_geterror (p->conn->fd);
rs_debug (("%s: %d: connect: %d (%s)\n", __func__, p->conn->fd,
sockerr, evutil_socket_error_to_string (sockerr)));
rs_err_conn_push_fl (p->conn, RSE_SOCKERR, __FILE__, __LINE__,
"%d: connect: %d (%s)", p->conn->fd, sockerr,
evutil_socket_error_to_string (sockerr));
}
}
}
int
event_loopbreak (struct rs_connection *conn)
{
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;
}
void
event_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);
}
void
event_on_connect (struct rs_connection *conn, struct rs_packet *pkt)
{
assert (!conn->is_connecting);
conn->is_connected = 1;
rs_debug (("%s: %p connected\n", __func__, conn->active_peer));
if (conn->callbacks.connected_cb)
conn->callbacks.connected_cb (conn->user_data);
if (pkt)
packet_do_send (pkt);
}
int
event_init_eventbase (struct rs_connection *conn)
{
assert (conn);
if (conn->evb)
return RSE_OK;
#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 RSE_OK;
}
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