/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single TCP/UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2008 OpenVPN Technologies, Inc. <sales@openvpn.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef FORWARD_INLINE_H
#define FORWARD_INLINE_H
/*
* Inline functions
*/
/*
* Does TLS session need service?
*/
static inline void
check_tls (struct context *c)
{
#if defined(USE_CRYPTO) && defined(USE_SSL)
void check_tls_dowork (struct context *c);
if (c->c2.tls_multi)
check_tls_dowork (c);
#endif
}
/*
* TLS errors are fatal in TCP mode.
* Also check for --tls-exit trigger.
*/
static inline void
check_tls_errors (struct context *c)
{
#if defined(USE_CRYPTO) && defined(USE_SSL)
void check_tls_errors_co (struct context *c);
void check_tls_errors_nco (struct context *c);
if (c->c2.tls_multi && c->c2.tls_exit_signal)
{
if (link_socket_connection_oriented (c->c2.link_socket))
{
if (c->c2.tls_multi->n_soft_errors)
check_tls_errors_co (c);
}
else
{
if (c->c2.tls_multi->n_hard_errors)
check_tls_errors_nco (c);
}
}
#endif
}
/*
* Check for possible incoming configuration
* messages on the control channel.
*/
static inline void
check_incoming_control_channel (struct context *c)
{
#if P2MP
void check_incoming_control_channel_dowork (struct context *c);
if (tls_test_payload_len (c->c2.tls_multi) > 0)
check_incoming_control_channel_dowork (c);
#endif
}
/*
* Options like --up-delay need to be triggered by this function which
* checks for connection establishment.
*/
static inline void
check_connection_established (struct context *c)
{
void check_connection_established_dowork (struct context *c);
if (event_timeout_defined (&c->c2.wait_for_connect))
check_connection_established_dowork (c);
}
/*
* Should we add routes?
*/
static inline void
check_add_routes (struct context *c)
{
void check_add_routes_dowork (struct context *c);
if (event_timeout_trigger (&c->c2.route_wakeup, &c->c2.timeval, ETT_DEFAULT))
check_add_routes_dowork (c);
}
/*
* Should we exit due to inactivity timeout?
*/
static inline void
check_inactivity_timeout (struct context *c)
{
void check_inactivity_timeout_dowork (struct context *c);
if (c->options.inactivity_timeout
&& event_timeout_trigger (&c->c2.inactivity_interval, &c->c2.timeval, ETT_DEFAULT))
check_inactivity_timeout_dowork (c);
}
#if P2MP
/*
* Scheduled exit?
*/
static inline void
check_scheduled_exit (struct context *c)
{
void check_scheduled_exit_dowork (struct context *c);
if (event_timeout_defined (&c->c2.scheduled_exit))
{
if (event_timeout_trigger (&c->c2.scheduled_exit, &c->c2.timeval, ETT_DEFAULT))
check_scheduled_exit_dowork (c);
}
}
#endif
/*
* Should we write timer-triggered status file.
*/
static inline void
check_status_file (struct context *c)
{
void check_status_file_dowork (struct context *c);
if (c->c1.status_output)
{
if (status_trigger_tv (c->c1.status_output, &c->c2.timeval))
check_status_file_dowork (c);
}
}
#ifdef ENABLE_FRAGMENT
/*
* Should we deliver a datagram fragment to remote?
*/
static inline void
check_fragment (struct context *c)
{
void check_fragment_dowork (struct context *c);
if (c->c2.fragment)
check_fragment_dowork (c);
}
#endif
#if P2MP
/*
* see if we should send a push_request in response to --pull
*/
static inline void
check_push_request (struct context *c)
{
void check_push_request_dowork (struct context *c);
if (event_timeout_trigger (&c->c2.push_request_interval, &c->c2.timeval, ETT_DEFAULT))
check_push_request_dowork (c);
}
#endif
#ifdef USE_CRYPTO
/*
* Should we persist our anti-replay packet ID state to disk?
*/
static inline void
check_packet_id_persist_flush (struct context *c)
{
if (packet_id_persist_enabled (&c->c1.pid_persist)
&& event_timeout_trigger (&c->c2.packet_id_persist_interval, &c->c2.timeval, ETT_DEFAULT))
packet_id_persist_save (&c->c1.pid_persist);
}
#endif
/*
* Set our wakeup to 0 seconds, so we will be rescheduled
* immediately.
*/
static inline void
context_immediate_reschedule (struct context *c)
{
c->c2.timeval.tv_sec = 0; /* ZERO-TIMEOUT */
c->c2.timeval.tv_usec = 0;
}
static inline void
context_reschedule_sec (struct context *c, int sec)
{
if (sec < 0)
sec = 0;
if (sec < c->c2.timeval.tv_sec)
{
c->c2.timeval.tv_sec = sec;
c->c2.timeval.tv_usec = 0;
}
}
static inline struct link_socket_info *
get_link_socket_info (struct context *c)
{
if (c->c2.link_socket_info)
return c->c2.link_socket_info;
else
return &c->c2.link_socket->info;
}
static inline void
register_activity (struct context *c, const int size)
{
if (c->options.inactivity_timeout)
{
c->c2.inactivity_bytes += size;
if (c->c2.inactivity_bytes >= c->options.inactivity_minimum_bytes)
{
c->c2.inactivity_bytes = 0;
event_timeout_reset (&c->c2.inactivity_interval);
}
}
}
/*
* Return the io_wait() flags appropriate for
* a point-to-point tunnel.
*/
static inline unsigned int
p2p_iow_flags (const struct context *c)
{
unsigned int flags = (IOW_SHAPER|IOW_CHECK_RESIDUAL|IOW_FRAG|IOW_READ|IOW_WAIT_SIGNAL);
if (c->c2.to_link.len > 0)
flags |= IOW_TO_LINK;
if (c->c2.to_tun.len > 0)
flags |= IOW_TO_TUN;
return flags;
}
/*
* This is the core I/O wait function, used for all I/O waits except
* for TCP in server mode.
*/
static inline void
io_wait (struct context *c, const unsigned int flags)
{
void io_wait_dowork (struct context *c, const unsigned int flags);
if (c->c2.fast_io && (flags & (IOW_TO_TUN|IOW_TO_LINK|IOW_MBUF)))
{
/* fast path -- only for TUN/TAP/UDP writes */
unsigned int ret = 0;
if (flags & IOW_TO_TUN)
ret |= TUN_WRITE;
if (flags & (IOW_TO_LINK|IOW_MBUF))
ret |= SOCKET_WRITE;
c->c2.event_set_status = ret;
}
else
{
/* slow path */
io_wait_dowork (c, flags);
}
}
#define CONNECTION_ESTABLISHED(c) (get_link_socket_info(c)->connection_established)
#endif /* EVENT_INLINE_H */
