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authorBernhard Schmidt <berni@debian.org>2020-09-01 16:53:26 +0200
committerBernhard Schmidt <berni@debian.org>2020-09-01 16:53:26 +0200
commit57f0b7b331088e489e93ae89ee0aed98381d8806 (patch)
treeb86439ebb9e98eb6b81bda4c47f67cd3959d182f /doc/doxygen/doc_eventloop.h
parent1079962e4c06f88a54e50d997c1b7e84303d30b4 (diff)
New upstream version 2.5~beta3upstream/2.5_beta3
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-/*
- * 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) 2010-2018 Fox Crypto B.V. <openvpn@fox-it.com>
- *
- *
- * 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; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-/**
- * @file
- * Main Event Loop module documentation file.
- */
-
-/**
- * @defgroup eventloop Main Event Loop module
- *
- * This main event loop module drives the packet processing of OpenVPN.
- *
- * OpenVPN is an event driven system. Its activities are driven by a main
- * event loop, which repeatedly waits for one of several predefined events
- * to occur, and then calls the appropriate module to handle the event.
- * The major types of network events that OpenVPN processes are:
- * - A packet can be read from the external network interface.
- * - The main event loop activates the \link external_multiplexer
- * External Multiplexer\endlink to read and process the packet.
- * - A packet can be read from the virtual tun/tap network interface.
- * - The main event loop activates the \link internal_multiplexer
- * Internal Multiplexer\endlink to read and process the packet.
- * - If a packet is ready to be sent out as a VPN tunnel packet: the
- * external network interface can be written to.
- * - The main event loop activates the \link external_multiplexer
- * External Multiplexer\endlink to send the packet.
- * - If a packet is ready to be sent to a locally reachable destination:
- * the virtual tun/tap network interface can be written to.
- * - The main event loop activates the \link internal_multiplexer
- * Internal Multiplexer\endlink to send the packet.
- *
- * Beside these external events, OpenVPN also processes other types of
- * internal events. These include scheduled events, such as resending of
- * non-acknowledged control channel messages.
- *
- * @par Main event loop implementations
- *
- * Depending on the mode in which OpenVPN is running, a different main
- * event loop function is called to drive the event processing. The
- * following implementations are available:
- * - Client mode using UDP or TCP: \c tunnel_point_to_point()
- * - Server mode using UDP: \c tunnel_server_udp_single_threaded()
- * - Server mode using TCP: \c tunnel_server_tcp()
- */