diff options
author | Parménides GV <parmegv@sdf.org> | 2014-04-08 12:04:17 +0200 |
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committer | Parménides GV <parmegv@sdf.org> | 2014-04-08 12:04:17 +0200 |
commit | 3c3421afd8f74a3aa8d1011de07a8c18f9549210 (patch) | |
tree | 49d52344661c23d7268b8ea69466a1cfef04bf8b /app/openvpn/doc/doxygen | |
parent | 5fc5d37330d3535a0f421632694d1e7918fc22d7 (diff) |
Rename app->bitmask_android
This way, gradle commands generate apks correctly named.
Diffstat (limited to 'app/openvpn/doc/doxygen')
-rw-r--r-- | app/openvpn/doc/doxygen/doc_compression.h | 92 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_control_processor.h | 189 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_control_tls.h | 105 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_data_control.h | 103 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_data_crypto.h | 75 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_eventloop.h | 67 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_external_multiplexer.h | 46 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_fragmentation.h | 96 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_internal_multiplexer.h | 44 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_key_generation.h | 153 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_mainpage.h | 162 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_memory_management.h | 99 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_protocol_overview.h | 199 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_reliable.h | 49 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/doc_tunnel_state.h | 155 | ||||
-rw-r--r-- | app/openvpn/doc/doxygen/openvpn.doxyfile | 279 |
16 files changed, 0 insertions, 1913 deletions
diff --git a/app/openvpn/doc/doxygen/doc_compression.h b/app/openvpn/doc/doxygen/doc_compression.h deleted file mode 100644 index bdc4a7ed..00000000 --- a/app/openvpn/doc/doxygen/doc_compression.h +++ /dev/null @@ -1,92 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file Data Channel Compression module documentation file. - */ - -/** - * @defgroup compression Data Channel Compression module - * - * This module offers compression of data channel packets. - * - * @par State structures - * The Data Channel Compression module stores its internal state in a \c - * lzo_compress_workspace structure. This state includes flags which - * control the module's behavior and preallocated working memory. One - * such structure is present for each VPN tunnel, and is stored in the \c - * context.c2.lzo_compwork of the \c context associated with that VPN - * tunnel. - * - * @par Initialization and cleanup - * Every time a new \c lzo_compress_workspace is needed, it must be - * initialized using the \c lzo_compress_init() function. Similarly, - * every time a \c lzo_compress_workspace is no longer needed, it must be - * cleaned up using the \c lzo_compress_uninit() function. These - * functions take care of the allocation and freeing of internal working - * memory, but not of the \c lzo_compress_workspace structures themselves. - * - * @par - * Because of the one-to-one relationship between \c - * lzo_compress_workspace structures and VPN tunnels, the above-mentioned - * initialization and cleanup functions are called directly from the \c - * init_instance() and \c close_instance() functions, which control the - * initialization and cleanup of VPN tunnel instances and their associated - * \c context structures. - * - * @par Packet processing functions - * This module receives data channel packets from the \link data_control - * Data Channel Control module\endlink and processes them according to the - * settings of the packet's VPN tunnel. The \link data_control Data - * Channel Control module\endlink uses the following interface functions: - * - For packets which will be sent to a remote OpenVPN peer: \c - * lzo_compress() - * - For packets which have been received from a remote OpenVPN peer: \c - * lzo_decompress() - * - * @par Settings that control this module's activity - * Whether or not the Data Channel Compression module is active depends on - * the compile-time \c ENABLE_LZO preprocessor macro and the runtime flags - * stored in \c lzo_compress_workspace.flags of the associated VPN tunnel. - * The latter are initialized from \c options.lzo, which gets its value - * from the process's configuration sources, such as its configuration - * file or command line %options. - * - * @par Adaptive compression - * The compression module supports adaptive compression. If this feature - * is enabled, the compression routines monitor their own performance and - * turn compression on or off depending on whether it is leading to - * significantly reduced payload size. - * - * @par Compression algorithms - * This module uses the Lempel-Ziv-Oberhumer (LZO) compression algorithms. - * These offer lossless compression and are designed for high-performance - * decompression. This module uses the external \c lzo library's - * implementation of the algorithms. - * - * @par - * For more information on the LZO library, see:\n - * http://www.oberhumer.com/opensource/lzo/ - */ diff --git a/app/openvpn/doc/doxygen/doc_control_processor.h b/app/openvpn/doc/doxygen/doc_control_processor.h deleted file mode 100644 index 072dc372..00000000 --- a/app/openvpn/doc/doxygen/doc_control_processor.h +++ /dev/null @@ -1,189 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Control Channel Processor module documentation file. - */ - -/** - * @defgroup control_processor Control Channel Processor module - * - * This module controls the setup and maintenance of VPN tunnels and the - * associated security parameters. - * - * @par This module's role - * The Control Channel Processor module lies at the core of OpenVPN's - * activities. It handles the setup of new VPN tunnels, the negotiation - * of data channel security parameters, the managing of active VPN - * tunnels, and finally the cleanup of expired VPN tunnels. - * - * @par State structures - * A large amount of VPN tunnel state information must be stored within an - * OpenVPN process. A wide variety of container structures are used by - * this module for that purpose. Several of these structures are listed - * below, and the function of the first three VPN tunnel state containers - * is described in more detail later. - * - VPN tunnel state containers: - * - \c tls_multi, security parameter state for a single VPN tunnel. - * Contains three instances of the \c tls_session structure. - * - \c tls_session, security parameter state of a single session - * within a VPN tunnel. Contains two instances of the \c key_state - * structure. - * - \c key_state, security parameter state of one TLS and data - * channel %key set. - * - Data channel security parameter containers: - * - \c key_ctx_bi, container for two sets of OpenSSL cipher and/or - * HMAC context (both directions). Contains two instances of the \c - * key_ctx structure. - * - \c key_ctx, container for one set of OpenSSL cipher and/or HMAC - * context (one directions. - * - Key material containers: - * - \c key2, container for two sets of cipher and/or HMAC %key - * material (both directions). Contains two instances of the \c key - * structure. - * - \c key, container for one set of cipher and/or HMAC %key material - * (one direction). - * - \c key_direction_state, ordering of %key material within the \c - * key2.key array. - * - Key method 2 random material containers: - * - \c key_source2, container for both halves of random material used - * for %key method 2. Contains two instances of the \c key_source - * structure. - * - \c key_source, container for one half of random material used for - * %key method 2. - * - * @par The life of a \c tls_multi object - * A \c tls_multi structure contains all the security parameter state - * information related to the control and data channels of one VPN tunnel. - * Its life cycle can be summarized as follows: - * -# Initialization: \c tls_multi_init() and \c - * tls_multi_init_finalize(), which are called (indirectly) from \c - * init_instance() when initializing a new \c context structure. - * - Initializes a \c tls_multi structure. - * - Allocates the three \c tls_session objects contained by the \c - * tls_multi structure, and initializes as appropriate. - * -# Management: \c tls_multi_process() and \c tls_pre_decrypt() - * - If a new session is initiated by the remote peer, then \c - * tls_pre_decrypt() starts the new session negotiation in the - * un-trusted \c tls_session. - * - If the, as yet, un-trusted \c tls_session authenticates - * successfully, then \c tls_multi_process() moves it so as to be - * the active \c tls_session. - * - If an error occurs during processing of a \c key_state object, - * then \c tls_multi_process() cleans up and initializes the - * associated \c tls_session object. If the error occurred in the - * active \c key_state of the active \c tls_session and the - * lame-duck \c key_state of that \c tls_session has not yet - * expired, it is preserved as fallback. - * -# Cleanup: \c tls_multi_free(), which is called (indirectly) from \c - * close_instance() when cleaning up a \c context structure. - * - Cleans up a \c tls_multi structure. - * - Cleans up the three \c tls_session objects contained by the \c - * tls_multi structure. - * - * @par The life of a \c tls_session object - * A \c tls_session structure contains the state information related to an - * active and a lame-duck \c key_state. Its life cycle can be summarized - * as follows: - * -# Initialization: \c tls_session_init() - * - Initializes a \c tls_session structure. - * - Initializes the primary \c key_state by calling \c - * key_state_init(). - * -# Renegotiation: \c key_state_soft_reset() - * - Cleans up the old lame-duck \c key_state by calling \c - * key_state_free(). - * - Moves the old primary \c key_state to be the new lame-duck \c - * key_state. - * - Initializes a new primary \c key_state by calling \c - * key_state_init(). - * -# Cleanup: \c tls_session_free() - * - Cleans up a \c tls_session structure. - * - Cleans up all \c key_state objects associated with the session by - * calling \c key_state_free() for each. - * - * @par The life of a \c key_state object - * A \c key_state structure represents one control and data channel %key - * set. It contains an OpenSSL TLS object that encapsulates the control - * channel, and the data channel security parameters needed by the \link - * data_crypto Data Channel Crypto module\endlink to perform cryptographic - * operations on data channel packets. Its life cycle can be summarized - * as follows: - * -# Initialization: \c key_state_init() - * - Initializes a \c key_state structure. - * - Creates a new OpenSSL TLS object to encapsulate this new control - * channel session. - * - Sets \c key_state.state to \c S_INITIAL. - * - Allocates several internal buffers. - * - Initializes new reliability layer structures for this key set. - * -# Negotiation: \c tls_process() - * - The OpenSSL TLS object negotiates a TLS session between itself - * and the remote peer's TLS object. - * - Key material is generated and exchanged through the TLS session - * between OpenVPN peers. - * - Both peers initialize their data channel cipher and HMAC key - * contexts. - * - On successful negotiation, the \c key_state.state will progress - * from \c S_INITIAL to \c S_ACTIVE and \c S_NORMAL. - * -# Active tunneling: \link data_crypto Data Channel Crypto - * module\endlink - * - Data channel packet to be sent to a remote OpenVPN peer: - * - \c tls_pre_encrypt() loads the security parameters from the \c - * key_state into a \c crypto_options structure. - * - \c openvpn_encrypt() uses the \c crypto_options to an encrypt - * and HMAC sign the data channel packet. - * - Data channel packet received from a remote OpenVPN peer: - * - \c tls_pre_decrypt() loads the security parameters from the \c - * key_state into a \c crypto_options structure. - * - \c openvpn_encrypt() uses the \c crypto_options to - * authenticate and decrypt the data channel packet. - * -# Cleanup: \c key_state_free() - * - Cleans up a \c key_state structure together with its OpenSSL TLS - * object, key material, internal buffers, and reliability layer - * structures. - * - * @par Control functions - * The following two functions drive the Control Channel Processor's - * activities. - * - \c tls_multi_process(), iterates through the \c tls_session objects - * within a given \c tls_multi of a VPN tunnel, and calls \c - * tls_process() for each \c tls_session which is being set up, is - * already active, or is busy expiring. - * - \c tls_process(), performs the Control Channel Processor module's - * core handling of received control channel messages, and generates - * appropriate messages to be sent. - * - * @par Functions which control data channel key generation - * - Key method 1 key exchange functions: - * - \c key_method_1_write(), generates and processes key material to - * be sent to the remote OpenVPN peer. - * - \c key_method_1_read(), processes key material received from the - * remote OpenVPN peer. - * - Key method 2 key exchange functions: - * - \c key_method_2_write(), generates and processes key material to - * be sent to the remote OpenVPN peer. - * - \c key_method_2_read(), processes key material received from the - * remote OpenVPN peer. - */ diff --git a/app/openvpn/doc/doxygen/doc_control_tls.h b/app/openvpn/doc/doxygen/doc_control_tls.h deleted file mode 100644 index aba55f77..00000000 --- a/app/openvpn/doc/doxygen/doc_control_tls.h +++ /dev/null @@ -1,105 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Control Channel TLS module documentation file. - */ - -/** - * @defgroup control_tls Control Channel TLS module - * - * This module provides secure encapsulation of control channel messages - * exchanged between OpenVPN peers. - * - * The Control Channel TLS module uses the Transport Layer Security (TLS) - * protocol to provide an encrypted communication channel between the - * local OpenVPN process and a remote peer. This protocol simultaneously - * offers certificate-based authentication of the communicating parties. - * - * @par This module's roles - * The Control Channel TLS module is essential for the security of any - * OpenVPN-based system. On the one hand, it performs the security - * operations necessary to protect control channel messages exchanged - * between OpenVPN peers. On the other hand, before the control and data - * channels are even setup, it controls the exchange of certificates and - * verification of the remote's identity during negotiation of VPN - * tunnels. - * - * @par - * The former role is described below. The latter is described in the - * documentation for the \c verify_callback() function. - * - * @par - * In other words, this module takes care of the confidentiality and - * integrity of data channel communications, and the authentication of - * both the communicating parties and the control channel messages - * exchanged. - * - * @par Initialization and cleanup - * Because of the one-to-one relationship between control channel TLS - * state and \c key_state structures, the initialization and cleanup of an - * instance of the Control Channel TLS module's state happens within the - * \c key_state_init() and \c key_state_free() functions. In other words, - * each \c key_state object contains exactly one OpenSSL SSL-BIO object, - * which is initialized and cleaned up together with the rest of the \c - * key_state object. - * - * @par Packet processing functions - * This object behaves somewhat like a black box with a ciphertext and a - * plaintext I/O port. Its interaction with OpenVPN's control channel - * during operation takes place within the \c tls_process() function of - * the \link control_processor Control Channel Processor\endlink. The - * following functions are available for processing packets: - * - If ciphertext received from the remote peer is available in the \link - * reliable Reliability Layer\endlink: - * - Insert it into the ciphertext-side of the SSL-BIO. - * - Use function: \c key_state_write_ciphertext() - * - If ciphertext can be extracted from the ciphertext-side of the - * SSL-BIO: - * - Pass it to the \link reliable Reliability Layer\endlink for sending - * to the remote peer. - * - Use function: \c key_state_read_ciphertext() - * - If plaintext can be extracted from the plaintext-side of the SSL-BIO: - * - Pass it on to the \link control_processor Control Channel - * Processor\endlink for local processing. - * - Use function: \c key_state_read_plaintext() - * - If plaintext from the \link control_processor Control Channel - * Processor\endlink is available to be sent to the remote peer: - * - Insert it into the plaintext-side of the SSL-BIO. - * - Use function: \c key_state_write_plaintext() or \c - * key_state_write_plaintext_const() - * - * @par Transport Layer Security protocol implementation - * This module uses the OpenSSL library's implementation of the TLS - * protocol in the form of an OpenSSL SSL-BIO object. - * - * @par - * For more information on the OpenSSL library's BIO objects, please see: - * - OpenSSL's generic BIO objects: - * http://www.openssl.org/docs/crypto/bio.html - * - OpenSSL's SSL-BIO object: - * http://www.openssl.org/docs/crypto/BIO_f_ssl.html - */ diff --git a/app/openvpn/doc/doxygen/doc_data_control.h b/app/openvpn/doc/doxygen/doc_data_control.h deleted file mode 100644 index d0f65ba3..00000000 --- a/app/openvpn/doc/doxygen/doc_data_control.h +++ /dev/null @@ -1,103 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Data Channel Control module documentation file. - */ - -/** - * @defgroup data_control Data Channel Control module - * - * This module controls the processing of packets as they pass through the - * data channel. - * - * The Data Channel Control module controls the processing of packets as - * they pass through the data channel. The processing includes packet - * compression, fragmentation, and the performing of security operations - * on the packets. This module does not do the processing itself, but - * passes the packet to other data channel modules to perform the - * appropriate actions. - * - * Packets can travel in two directions through the data channel. They - * can be going to a remote destination which is reachable through a VPN - * tunnel, in which case this module prepares them to be sent out through - * a VPN tunnel. On the other hand, they can have been received through a - * VPN tunnel from a remote OpenVPN peer, in which case this module - * retrieves the packet in its original form as it was before entering the - * VPN tunnel on the remote OpenVPN peer. How this module processes - * packets traveling in the two directions is discussed in more detail - * below. - * - * @par Packets to be sent to a remote OpenVPN peer - * This module's main function for processing packets traveling in this - * direction is \c encrypt_sign(), which performs the following processing - * steps: - * - Call the \link compression Data Channel Compression module\endlink to - * perform packet compression if necessary. - * - Call the \link fragmentation Data Channel Fragmentation - * module\endlink to perform packet fragmentation if necessary. - * - Call the \link data_crypto Data Channel Crypto module\endlink to - * perform the required security operations. - * - * @par - * See the \c encrypt_sign() documentation for details of these - * interactions. - * - * @par - * After the above processing is complete, the packet is ready to be sent - * to a remote OpenVPN peer as a VPN tunnel packet. The actual sending of - * the packet is handled by the \link external_multiplexer External - * Multiplexer\endlink. - * - * @par Packets received from a remote OpenVPN peer - * The function that controls how packets traveling in this direction are - * processed is \c process_incoming_link(). That function, however, also - * performs some of the tasks required for the \link external_multiplexer - * External Multiplexer\endlink and is therefore listed as part of that - * module, instead of here. - * - * @par - * After the \c process_incoming_link() function has determined that a - * received packet is a data channel packet, it performs the following - * processing steps: - * - Call the \link data_crypto Data Channel Crypto module\endlink to - * perform the required security operations. - * - Call the \link fragmentation Data Channel Fragmentation - * module\endlink to perform packet reassembly if necessary. - * - Call the \link compression Data Channel Compression module\endlink to - * perform packet decompression if necessary. - * - * @par - * See the \c process_incoming_link() documentation for details of these - * interactions. - * - * @par - * After the above processing is complete, the packet is in its original - * form again as it was received by the remote OpenVPN peer. It can now - * be routed further to its final destination. If that destination is a - * locally reachable host, then the \link internal_multiplexer Internal - * Multiplexer\endlink will send it there. - */ diff --git a/app/openvpn/doc/doxygen/doc_data_crypto.h b/app/openvpn/doc/doxygen/doc_data_crypto.h deleted file mode 100644 index ee72b8cd..00000000 --- a/app/openvpn/doc/doxygen/doc_data_crypto.h +++ /dev/null @@ -1,75 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Data Channel Crypto module documentation file. - */ - -/** - * @addtogroup data_crypto Data Channel Crypto module - * - * The Data Channel Crypto Module performs cryptographic operations on - * data channel packets. - * - * @par Security parameters - * This module is merely the user of a VPN tunnel's security parameters. - * It does not perform the negotiation and setup of the security - * parameters, nor the %key generation involved. These actions are done - * by the \link control_processor Control Channel Processor\endlink. This - * module receives the appropriate security parameters from that module in - * the form of a \c crypto_options structure when they are necessary for - * processing a packet. - * - * @par Packet processing functions - * This module receives data channel packets from the \link data_control - * Data Channel Control module\endlink and processes them according to the - * security parameters of the packet's VPN tunnel. The \link data_control - * Data Channel Control module\endlink uses the following interface - * functions: - * - For packets which will be sent to a remote OpenVPN peer: - * - \c tls_pre_encrypt() - * - \c openvpn_encrypt() - * - \c tls_post_encrypt() - * - For packets which have been received from a remote OpenVPN peer: - * - \c tls_pre_decrypt() (documented as part of the \link - * external_multiplexer External Multiplexer\endlink) - * - \c openvpn_decrypt() - * - * @par Settings that control this module's activity - * Whether or not the Data Channel Crypto module is active depends on the - * compile-time \c ENABLE_CRYPTO and \c ENABLE_SSL preprocessor macros. How it - * processes packets received from the \link data_control Data Channel - * Control module\endlink at runtime depends on the associated \c - * crypto_options structure. To perform cryptographic operations, the \c - * crypto_options.key_ctx_bi must contain the correct cipher and HMAC - * security parameters for the direction the packet is traveling in. - * - * @par Crypto algorithms - * This module uses the crypto algorithm implementations of the external - * OpenSSL library. More precisely, it uses the OpenSSL library's \c - * EVP_Cipher* and \c HMAC_* set of functions to perform cryptographic - * operations on data channel packets. - */ diff --git a/app/openvpn/doc/doxygen/doc_eventloop.h b/app/openvpn/doc/doxygen/doc_eventloop.h deleted file mode 100644 index a860db68..00000000 --- a/app/openvpn/doc/doxygen/doc_eventloop.h +++ /dev/null @@ -1,67 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @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() - */ diff --git a/app/openvpn/doc/doxygen/doc_external_multiplexer.h b/app/openvpn/doc/doxygen/doc_external_multiplexer.h deleted file mode 100644 index 76532557..00000000 --- a/app/openvpn/doc/doxygen/doc_external_multiplexer.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * External Multiplexer module documentation file. - */ - -/** - * @addtogroup external_multiplexer External Multiplexer module - * - * The External Multiplexer is the link between the external network - * interface and the other OpenVPN modules. It reads packets from the - * external network interface, determines which remote OpenVPN peer and - * VPN tunnel they are associated with, and whether they are data channel - * or control channel packets. It then passes the packets on to the - * appropriate processing module. - * - * This module also handles packets traveling in the reverse direction, - * which have been generated by the local control channel or which have - * already been processed by the \link data_control Data Channel Control - * module\endlink and are destined for a remote host reachable through a - * VPN tunnel. - */ diff --git a/app/openvpn/doc/doxygen/doc_fragmentation.h b/app/openvpn/doc/doxygen/doc_fragmentation.h deleted file mode 100644 index ef34cdb2..00000000 --- a/app/openvpn/doc/doxygen/doc_fragmentation.h +++ /dev/null @@ -1,96 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Data Channel Fragmentation module documentation file. - */ - -/** - * @defgroup fragmentation Data Channel Fragmentation module - * - * The Data Channel Fragmentation module offers fragmentation of data - * channel packets. - * - * @par State structures - * The Data Channel Fragmentation module stores its internal state in a \c - * fragment_master structure. One such structure is present for each VPN - * tunnel, and is stored in \c context.c2.fragment of the \c context - * associated with that VPN tunnel. - * - * @par - * The \c fragment_master structure contains one \c fragment_list - * structure \c fragment_master.incoming. This is a list of \c fragment - * structures, each of which can store the parts of one fragmented packet - * while it is being reassembled. The \c fragment_master structure also - * contains one \c buffer called \c fragment_master.outgoing, in which a - * data channel large packet to be sent to a remote OpenVPN peer can be - * broken up into parts to be sent one by one. - * - * @par Initialization and cleanup - * Every time a new \c fragment_master is needed, it must be allocated and - * initialized by the \c fragment_init() function. Similarly, every time - * a \c fragment_master is no longer needed, it must be cleaned up using - * the \c fragment_free() function. These functions take care of the - * allocation and freeing of the \c fragment_master structure itself and - * all internal memory required for the use of that structure. Note that - * this behavior is different from that displayed by the \link compression - * Data Channel Compression module\endlink. - * - * @par - * Because of the one-to-one relationship between \c fragment_master - * structures and VPN tunnels, the above-mentioned initialization and - * cleanup functions are called directly from the \c init_instance() and - * \c close_instance() functions, which control the initialization and - * cleanup of VPN tunnel instances and their associated \c context - * structures. - * - * @par Packet processing functions - * This module receives data channel packets from the \link data_control - * Data Channel Control module\endlink and processes them according to the - * settings of the packet's VPN tunnel. The \link data_control Data - * Channel Control module\endlink uses the following interface functions: - * - For packets which will be sent to a remote OpenVPN peer: \c - * fragment_outgoing() \n This function inspects data channel packets as - * they are being made ready to be sent as VPN tunnel packets to a - * remote OpenVPN peer. If a packet's size is larger than its - * destination VPN tunnel's maximum transmission unit (MTU), then this - * module breaks that packet up into smaller parts, each of which is - * smaller than or equal to the VPN tunnel's MTU. See \c - * fragment_outgoing() for details. - * - For packets which have been received from a remote OpenVPN peer: \c - * fragment_incoming() \n This function inspects data channel packets - * that have been received from a remote OpenVPN peer through a VPN - * tunnel. It reads the fragmentation header of the packet, and - * depending on its value performs the appropriate action. See \c - * fragment_incoming() for details. - * - * @par Settings that control this module's activity - * Whether the Data Channel Fragmentation module is active or not depends - * on the compile-time \c ENABLE_FRAGMENT preprocessor macro and the - * runtime flag \c options.fragment, which gets its value from the - * process's configuration sources, such as the configuration file and - * commandline %options. - */ diff --git a/app/openvpn/doc/doxygen/doc_internal_multiplexer.h b/app/openvpn/doc/doxygen/doc_internal_multiplexer.h deleted file mode 100644 index 5142dd0d..00000000 --- a/app/openvpn/doc/doxygen/doc_internal_multiplexer.h +++ /dev/null @@ -1,44 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Internal Multiplexer module documentation file. - */ - -/** - * @addtogroup internal_multiplexer Internal Multiplexer module - * - * The Internal Multiplexer is the link between the virtual tun/tap - * network interface and the \link data_control Data Channel Control - * module\endlink. It reads packets from the virtual network interface, - * determines for which remote OpenVPN peer they are destined, and then - * passes the packets on to the Data Channel Control module together with - * information about their destination VPN tunnel instance. - * - * This module also handles packets traveling in the reverse direction, - * which have already been processed by the Data Channel Control module - * and are destined for a locally reachable host. - */ diff --git a/app/openvpn/doc/doxygen/doc_key_generation.h b/app/openvpn/doc/doxygen/doc_key_generation.h deleted file mode 100644 index 903a4652..00000000 --- a/app/openvpn/doc/doxygen/doc_key_generation.h +++ /dev/null @@ -1,153 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Key generation documentation file. - */ - -/** - * @page key_generation Data channel %key generation - * - * This section describes how OpenVPN peers generate and exchange %key - * material necessary for the security operations performed on data - * channel packets. - * - * The %key generation and exchange process between OpenVPN client and - * server occurs every time data channel security parameters are - * negotiated, for example during the initial setup of a VPN tunnel or - * when the active security parameters expire. In source code terms, this - * is when a new key_state structure is initialized. - * - * @section key_generation_method Key methods - * - * OpenVPN supports two different ways of generating and exchanging %key - * material between client and server. These are known as %key method 1 - * and %key method 2. %Key method 2 is the recommended method. Both are - * explained below. - * - * @subsection key_generation_method_1 Key method 1 - * - * -# Each host generates its own random material. - * -# Each host uses its locally generated random material as %key data - * for encrypting and signing packets sent to the remote peer. - * -# Each host then sends its random material to the remote peer, so that - * the remote peer can use that %key data for authenticating and - * decrypting received packets. - * - * @subsection key_generation_method_2 Key method 2 - * - * -# The client generates random material in the following amounts: - * - Pre-master secret: 48 bytes - * - Client's PRF seed for master secret: 32 bytes - * - Client's PRF seed for %key expansion: 32 bytes - * -# The client sends its share of random material to the server. - * -# The server generates random material in the following amounts: - * - Server's PRF seed for master secret: 32 bytes - * - Server's PRF seed for %key expansion: 32 bytes - * -# The server computes the %key expansion using its own and the - * client's random material. - * -# The server sends its share of random material to the client. - * -# The client computes the %key expansion using its own and the - * server's random material. - * - * %Key method 2 %key expansion is performed by the \c - * generate_key_expansion() function. Please refer to its source code for - * details of the %key expansion process. - * - * @subsection key_generation_random Source of random material - * - * OpenVPN uses the either the OpenSSL library or the PolarSSL library as its - * source of random material. - * - * In OpenSSL, the \c RAND_bytes() function is called - * to supply cryptographically strong pseudo-random data. The following links - * contain more information on this subject: - * - For OpenSSL's \c RAND_bytes() function: - * http://www.openssl.org/docs/crypto/RAND_bytes.html - * - For OpenSSL's pseudo-random number generating system: - * http://www.openssl.org/docs/crypto/rand.html - * - For OpenSSL's support for external crypto modules: - * http://www.openssl.org/docs/crypto/engine.html - * - * In PolarSSL, the Havege random number generator is used. For details, see - * the PolarSSL documentation. - * - * @section key_generation_exchange Key exchange: - * - * The %key exchange process is initiated by the OpenVPN process running - * in client mode. After the initial three-way handshake has successfully - * completed, the client sends its share of random material to the server, - * after which the server responds with its part. This process is - * depicted below: - * -@verbatim - Client Client Server Server - State Action Action State ----------- -------------------- -------------------- ---------- - - ... waiting until three-way handshake complete ... -S_START S_START - key_method_?_write() - send to server --> --> --> --> receive from client -S_SENT_KEY key_method_?_read() - S_GOT_KEY - key_method_?_write() - receive from server <-- <-- <-- <-- send to client - key_method_?_read() S_SENT_KEY -S_GOT_KEY - ... waiting until control channel fully synchronized ... -S_ACTIVE S_ACTIVE -@endverbatim - * - * For more information about the client and server state values, see the - * \link control_processor Control Channel Processor module\endlink. - * - * Depending on which %key method is used, the \c ? in the function names - * of the diagram above is a \c 1 or a \c 2. For example, if %key method - * 2 is used, that %key exchange would be started by the client calling \c - * key_method_2_write(). These functions are called from the \link - * control_processor Control Channel Processor module's\endlink \c - * tls_process() function and control the %key generation and exchange - * process as follows: - * - %Key method 1: - * - \c key_method_1_write(): generate random material locally, and load - * as "sending" keys. - * - \c key_method_1_read(): read random material received from remote - * peer, and load as "receiving" keys. - * - %Key method 2: - * - \c key_method_2_write(): generate random material locally, and if - * in server mode generate %key expansion. - * - \c key_method_2_read(): read random material received from remote - * peer, and if in client mode generate %key expansion. - * - * @subsection key_generation_encapsulation Transmission of key material - * - * The OpenVPN client and server communicate with each other through their - * control channel. This means that all of the data transmitted over the - * network, such as random material for %key generation, is encapsulated - * in a TLS layer. For more details, see the \link control_tls Control - * Channel TLS module\endlink documentation. - */ diff --git a/app/openvpn/doc/doxygen/doc_mainpage.h b/app/openvpn/doc/doxygen/doc_mainpage.h deleted file mode 100644 index 821b2e87..00000000 --- a/app/openvpn/doc/doxygen/doc_mainpage.h +++ /dev/null @@ -1,162 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Main page documentation file. - */ - -/** - * @mainpage OpenVPN v2.1 source code documentation - * - * This documentation describes the internal structure of OpenVPN. It was - * automatically generated from specially formatted comment blocks in - * OpenVPN's source code using Doxygen. (See - * http://www.stack.nl/~dimitri/doxygen/ for more information on Doxygen) - * - * The \ref mainpage_modules "Modules section" below gives an introduction - * into the high-level module concepts used throughout this documentation. - * The \ref mainpage_relatedpages "Related Pages section" below describes - * various special subjects related to OpenVPN's implementation which are - * discussed in the related pages section. - * - * @section mainpage_modules Modules - * - * For the purpose of describing the internal structure of OpenVPN, this - * documentation and the underlying source code has been broken up into a - * number of conceptually well-defined parts, known as modules. Each - * module plays a specific role within the OpenVPN process, and in most - * cases each module has a clear interfacing strategy for interacting with - * other modules. - * - * The following modules have been defined: - * - Driver module: - * - The \link eventloop Main Event Loop\endlink: this module drives the - * event handling of OpenVPN. It implements various types of - * select-loop which wait until an event happens, and then delegate - * the handling of that event to the appropriate module. - * - Network interface modules: - * - The \link external_multiplexer External Multiplexer\endlink: this - * module sends and receives packets to and from remote OpenVPN peers - * over the external network interface. It also takes care of - * demultiplexing received packets to their appropriate VPN tunnel and - * splitting control channel and data channel packets. - * - The \link internal_multiplexer Internal Multiplexer\endlink: this - * module sends and receives packets to and from locally reachable - * posts over the virtual tun/tap network interface. It also takes - * care of determining through which VPN tunnel a received packet must - * be sent to reach its destination. - * - Control channel modules: - * - The \link reliable Reliability Layer\endlink: this module offers a - * %reliable and sequential transport layer for control channel - * messages. - * - The \link control_tls Control Channel TLS module\endlink: this - * module offers a secure encapsulation of control channel messages - * using the TLS protocol. - * - The \link control_processor Control Channel Processor\endlink: his - * module manages the setup, maintenance, and shut down of VPN - * tunnels. - * - Data channel modules: - * - The \link data_control Data Channel Control module\endlink: this - * module controls the processing of data channel packets and, - * depending on the settings of the packet's VPN tunnel, passes the - * packet to the three modules below for handling. - * - The \link data_crypto Data Channel Crypto module\endlink: this - * module performs security operations on data channel packets. - * - The \link fragmentation Data Channel Fragmentation module\endlink: - * this module offers fragmentation of data channel packets larger - * than the VPN tunnel's MTU. - * - The \link compression Data Channel Compression module\endlink: this - * module offers compression of data channel packets. - * - * @subsection mainpage_modules_example Example event: receiving a packet - * - * OpenVPN handles many types of events during operation. These include - * external events, such as network traffic being received, and internal - * events, such as a %key session timing out causing renegotiation. An - * example event, receiving a packet over the network, is described here - * together with which modules play what roles: - * -# The \link eventloop Main Event Loop\endlink detects that a packet - * can be read from the external or the virtual tun/tap network - * interface. - * -# The \link eventloop Main Event Loop\endlink calls the \link - * external_multiplexer External Multiplexer\endlink or \link - * internal_multiplexer Internal Multiplexer\endlink to read and - * process the packet. - * -# The multiplexer module determines the type of packet and its - * destination, and passes the packet on to the appropriate handling - * module: - * - A control channel packet received by the \link - * external_multiplexer External Multiplexer\endlink is passed on - * through the \link reliable Reliability Layer\endlink and the \link - * control_tls Control Channel TLS module\endlink to the \link - * control_processor Control Channel Processor\endlink. - * - A data channel packet received by either multiplexer module is - * passed on to the \link data_control Data Channel Control - * module\endlink. - * -# The packet is processed by the appropriate control channel or data - * channel modules. - * -# If, after processing the packet, a resulting packet is generated - * that needs to be sent to a local or remote destination, it is given - * to the \link external_multiplexer External Multiplexer\endlink or - * \link internal_multiplexer Internal Multiplexer\endlink for sending. - * -# If a packet is waiting to be sent by either multiplexer module and - * the \link eventloop Main Event Loop\endlink detects that data can be - * written to the associated network interface, it calls the - * multiplexer module to send the packet. - * - * @section mainpage_relatedpages Related pages - * - * This documentation includes a number of descriptions of various aspects - * of OpenVPN and its implementation. These are not directly related to - * one module, function, or data structure, and are therefore listed - * separately under "Related Pages". - * - * @subsection mainpage_relatedpages_key_generation Data channel key generation - * - * The @ref key_generation "Data channel key generation" related page - * describes how, during VPN tunnel setup and renegotiation, OpenVPN peers - * generate and exchange the %key material required for the symmetric - * encryption/decryption and HMAC signing/verifying security operations - * performed on data channel packets. - * - * @subsection mainpage_relatedpages_tunnel_state VPN tunnel state - * - * The @ref tunnel_state "Structure of VPN tunnel state storage" related - * page describes how an OpenVPN process manages the state information - * associated with its active VPN tunnels. - * - * @subsection mainpage_relatedpages_network_protocol Network protocol - * - * The @ref network_protocol "Network protocol" related page describes the - * format and content of VPN tunnel packets exchanged between OpenVPN - * peers. - * - * @subsection mainpage_relatedpages_memory_management Memory management - * - * The @ref memory_management "Memory management strategies" related page - * gives a brief introduction into OpenVPN's memory %buffer library and - * garbage collection facilities. - */ diff --git a/app/openvpn/doc/doxygen/doc_memory_management.h b/app/openvpn/doc/doxygen/doc_memory_management.h deleted file mode 100644 index f948783e..00000000 --- a/app/openvpn/doc/doxygen/doc_memory_management.h +++ /dev/null @@ -1,99 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Memory management strategies documentation file. - */ - -/** - * @page memory_management OpenVPN's memory management strategies - * - * This section describes several implementation details relating to - * OpenVPN's memory management strategies. - * - * During operation, the OpenVPN process performs all kinds of operations - * on blocks of data. Receiving packets, encrypting content, prepending - * headers, etc. To make the programmer's job easier and to decrease the - * likelihood of memory-related bugs, OpenVPN uses its own memory %buffer - * library and garbage collection facilities. These are described in - * brief here. - * - * @section memory_management_buffer The buffer structure - * - * The \c buffer structure is a wrapper around a block of dynamically - * allocated memory which keeps track of the block's capacity \c - * buffer.capacity and location in memory \c buffer.data. This structure - * supports efficient prepending and appending within the allocated memory - * through the use of offset \c buffer.offset and length \c buffer.len - * fields. See the \c buffer documentation for more details on the - * structure itself. - * - * OpenVPN's %buffer library, implemented in the \c buffer.h and \c - * buffer.c files, contains many utility functions for working with \c - * buffer structures. These functions facilitate common operations, such - * as allocating, freeing, reading and writing to \c buffer structures, - * and even offer several more advanced operations, such as string - * matching and creating sub-buffers. - * - * Not only do these utility functions make working with \c buffer - * structures easy, they also perform extensive error checking. Each - * function, where necessary, checks whether enough space is available - * before performing its actions. This minimizes the chance of bugs - * leading to %buffer overflows and other vulnerabilities. - * - * @section memory_management_frame The frame structure - * - * The \c frame structure keeps track of the maximum allowed packet - * geometries of a network connection. - * - * It is used, for example, to determine the size of \c buffer structures - * in which to store data channel packets. This is done by having each - * data channel processing module register the maximum amount of extra - * space it will need for header prepending and content expansion in the - * \c frame structure. Once these parameters are known, \c buffer - * structures can be allocated, based on the \c frame parameters, so that - * they are large enough to allow efficient prepending of headers and - * processing of content. - * - * @section memory_management_garbage Garbage collection - * - * OpenVPN has many sizable functions which perform various actions - * depending on their %context. This makes it difficult to know in advance - * exactly how much memory must be allocated. The garbage collection - * facilities are used to keep track of dynamic allocations, thereby - * allowing easy collective freeing of the allocated memory. - * - * The garbage collection system is implemented by the \c gc_arena and \c - * gc_entry structures. The arena represents a garbage collecting unit, - * and contains a linked list of entries. Each entry represents one block - * of dynamically allocated memory. - * - * The garbage collection system also contains various utility functions - * for working with the garbage collection structures. These include - * functions for initializing new arenas, allocating memory of a given - * size and registering the allocation in an arena, and freeing all the - * allocated memory associated with an arena. - */ diff --git a/app/openvpn/doc/doxygen/doc_protocol_overview.h b/app/openvpn/doc/doxygen/doc_protocol_overview.h deleted file mode 100644 index 26fed331..00000000 --- a/app/openvpn/doc/doxygen/doc_protocol_overview.h +++ /dev/null @@ -1,199 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file Network protocol overview documentation file. - */ - -/** - * @page network_protocol OpenVPN's network protocol - * - * Description of packet structure in OpenVPN's network protocol. - * - * This document describes the structure of packets exchanged between - * OpenVPN peers. It is based on the protocol description in the \c ssl.h - * file. - * - * @section network_protocol_external Outer structure of packets exchanged between OpenVPN peers - * - * VPN tunnel packets are transported between OpenVPN peers using the UDP - * or TCP protocols. Their structure is described below. - * - * @subsection network_protocol_external_structure External packet structure - * - * - packet length (16 bits, unsigned) [TCP-mode only]: always sent as - * plain text. Since TCP is a stream protocol, this packet length - * defines the packetization of the stream. - * - packet opcode and key_id (8 bits) [TLS-mode only]: - * - package message type (high 5 bits) - * - key_id (low 3 bits): the key_id refers to an already negotiated - * TLS session. OpenVPN seamlessly renegotiates the TLS session by - * using a new key_id for the new session. Overlap (controlled by - * user definable parameters) between old and new TLS sessions is - * allowed, providing a seamless transition during tunnel operation. - * - payload (n bytes) - * - * @subsection network_protocol_external_types Message types - * - * The type of a VPN tunnel packet is indicated by its opcode. The - * following describes the various opcodes available. - * - * - Control channel messages: - * - \c P_CONTROL_HARD_RESET_CLIENT_V1 -- %Key method 1, initial %key - * from client, forget previous state. - * - \c P_CONTROL_HARD_RESET_SERVER_V1 -- %Key method 1, initial %key - * from server, forget previous state. - * - \c P_CONTROL_HARD_RESET_CLIENT_V2 -- %Key method 2, initial %key - * from client, forget previous state. - * - \c P_CONTROL_HARD_RESET_SERVER_V2 -- %Key method 2, initial %key - * from server, forget previous state. - * - \c P_CONTROL_SOFT_RESET_V1 -- New %key, with a graceful - * transition from old to new %key in the sense that a transition - * window exists where both the old or new key_id can be used. - * - \c P_CONTROL_V1 -- Control channel packet (usually TLS - * ciphertext). - * - \c P_ACK_V1 -- Acknowledgement for control channel packets - * received. - * - Data channel messages: - * - \c P_DATA_V1 -- Data channel packet containing data channel - * ciphertext. - * - * @subsection network_protocol_external_key_id Session IDs and Key IDs - * - * OpenVPN uses two different forms of packet identifiers: - * - The first form is 64 bits and is used for all control channel - * messages. This form is referred to as a \c session_id. - * - Data channel messages on the other hand use a shortened form of 3 - * bits for efficiency reasons since the vast majority of OpenVPN - * packets in an active tunnel will be data channel messages. This - * form is referred to as a \c key_id. - * - * The control and data channels use independent packet-id sequences, - * because the data channel is an unreliable channel while the control - * channel is a %reliable channel. Each use their own independent HMAC - * keys. - * - * @subsection network_protocol_external_reliable Control channel reliability layer - * - * Control channel messages (\c P_CONTROL_* and \c P_ACK_* message types) - * are TLS ciphertext packets which have been encapsulated inside of a - * reliability layer. The reliability layer is implemented as a - * straightforward acknowledge and retransmit model. - * - * Acknowledgments of received messages can be encoded in either the - * dedicated \c P_ACK_* record or they can be prepended to a \c - * P_CONTROL_* message. - * - * See the \link reliable Reliability Layer\endlink module for a detailed - * description. - * - * @section network_protocol_control Structure of control channel messages - * - * @subsection network_protocol_control_ciphertext Structure of ciphertext control channel messages - * - * Control channel packets in ciphertext form consist of the following - * parts: - * - * - local \c session_id (random 64 bit value to identify TLS session). - * - HMAC signature of entire encapsulation header for HMAC firewall - * [only if \c --tls-auth is specified] (usually 16 or 20 bytes). - * - packet-id for replay protection (4 or 8 bytes, includes sequence - * number and optional \c time_t timestamp). - * - acknowledgment packet-id array length (1 byte). - * - acknowledgment packet-id array (if length > 0). - * - acknowledgment remote session-id (if length > 0). - * - packet-id of this message (4 bytes). - * - TLS payload ciphertext (n bytes) (only for \c P_CONTROL_V1). - * - * Note that when \c --tls-auth is used, all message types are protected - * with an HMAC signature, even the initial packets of the TLS handshake. - * This makes it easy for OpenVPN to throw away bogus packets quickly, - * without wasting resources on attempting a TLS handshake which will - * ultimately fail. - * - * @subsection network_protocol_control_key_methods Control channel key methods and - * - * Once the TLS session has been initialized and authenticated, the TLS - * channel is used to exchange random %key material for bidirectional - * cipher and HMAC keys which will be used to secure data channel packets. - * OpenVPN currently implements two %key methods. %Key method 1 directly - * derives keys using random bits obtained from the \c RAND_bytes() - * OpenSSL function. %Key method 2 mixes random %key material from both - * sides of the connection using the TLS PRF mixing function. %Key method - * 2 is the preferred method and is the default for OpenVPN 2.0. - * - * The @ref key_generation "Data channel key generation" related page - * describes the %key methods in more detail. - * - * @subsection network_protocol_control_plaintext Structure of plaintext control channel messages - * - * - %Key method 1: - * - Cipher %key length in bytes (1 byte). - * - Cipher %key (n bytes). - * - HMAC %key length in bytes (1 byte). - * - HMAC %key (n bytes). - * - %Options string (n bytes, null terminated, client/server %options - * string should match). - * - %Key method 2: - * - Literal 0 (4 bytes). - * - %Key method (1 byte). - * - \c key_source structure (\c key_source.pre_master only defined - * for client -> server). - * - %Options string length, including null (2 bytes). - * - %Options string (n bytes, null terminated, client/server %options - * string must match). - * - [The username/password data below is optional, record can end at - * this point.] - * - Username string length, including null (2 bytes). - * - Username string (n bytes, null terminated). - * - Password string length, including null (2 bytes). - * - Password string (n bytes, null terminated). - * - * @section network_protocol_data Structure of data channel messages - * - * @subsection network_protocol_data_ciphertext Structure of ciphertext data channel messages - * - * The P_DATA_* payload represents encrypted, encapsulated tunnel packets - * which tend to be either IP packets or Ethernet frames. This is - * essentially the "payload" of the VPN. - * - * Data channel packets in ciphertext form consist of the following parts: - * - HMAC of ciphertext IV + ciphertext (if not disabled by \c --auth - * none). - * - Ciphertext IV (size is cipher-dependent, if not disabled by \c - * --no-iv). - * - Tunnel packet ciphertext. - * - * @subsection network_protocol_data_plaintext Structure of plaintext data channel messages - * - * Data channel packets in plaintext form consist of the following parts: - * - packet-id (4 or 8 bytes, if not disabled by --no-replay). - * - In TLS mode, 4 bytes are used because the implementation can - * force a TLS renegotation before \c 2^32 packets are sent. - * - In pre-shared %key mode, 8 bytes are used (sequence number and \c - * time_t value) to allow long-term %key usage without packet-id - * collisions. - * - User plaintext (n bytes). - */ diff --git a/app/openvpn/doc/doxygen/doc_reliable.h b/app/openvpn/doc/doxygen/doc_reliable.h deleted file mode 100644 index 5264906a..00000000 --- a/app/openvpn/doc/doxygen/doc_reliable.h +++ /dev/null @@ -1,49 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * Reliability Layer module documentation file. - */ - -/** - * @defgroup reliable Reliability Layer module - * - * The Reliability Layer is part of OpenVPN's control channel. It - * provides a reliable and sequential transport mechanism for control - * channel messages between OpenVPN peers. This module forms the - * interface between the \link external_multiplexer External - * Multiplexer\endlink and the \link control_tls Control Channel TLS - * module\endlink. - * - * @par UDP or TCP as VPN tunnel transport - * - * This is especially important when OpenVPN is configured to communicate - * over UDP, because UDP does not offer a reliable and sequential - * transport. OpenVPN endpoints can also communicate over TCP which does - * provide a reliable and sequential transport. In both cases, using UDP - * or TCP as an external transport, the internal Reliability Layer is - * active. - */ diff --git a/app/openvpn/doc/doxygen/doc_tunnel_state.h b/app/openvpn/doc/doxygen/doc_tunnel_state.h deleted file mode 100644 index 6c93e71b..00000000 --- a/app/openvpn/doc/doxygen/doc_tunnel_state.h +++ /dev/null @@ -1,155 +0,0 @@ -/* - * 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 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 (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 - */ - -/** - * @file - * VPN tunnel state documentation file. - */ - -/** - * @page tunnel_state Structure of the VPN tunnel state storage - * - * This section describes how OpenVPN stores its VPN tunnel state during - * operation. - * - * OpenVPN uses several data structures as storage containers for state - * information of active VPN tunnels. These are described in this - * section, together with a little bit of history to help understand the - * origin of the current architecture. - * - * Whether an OpenVPN process is running in client-mode or server-mode - * determines whether it can support only one or multiple simultaneously - * active VPN tunnels. This consequently also determines how the - * associated state information is wrapped up internally. This section - * gives an overview of the differences. - * - * @section tunnel_state_history Historic developments - * - * In the old v1.x series, an OpenVPN process managed only one single VPN - * tunnel. This allowed the VPN tunnel state to be stored together with - * process-global information in one single \c context structure. - * - * This changed, however, in the v2.x series, as new OpenVPN versions - * running in server-mode can support multiple simultaneously active VPN - * tunnels. This necessitated a redesign of the VPN tunnel state - * container structures, and modification of the \link - * external_multiplexer External Multiplexer\endlink and \link - * internal_multiplexer Internal Multiplexer\endlink systems. The - * majority of these changes are only relevant for OpenVPN processes - * running in server-mode, and the client-mode structure has remained very - * similar to the v1.x single-tunnel form. - * - * @section tunnel_state_client Client-mode state - * - * An OpenVPN process running in client-mode can manage at most one single - * VPN tunnel at any one time. The state information for a client's VPN - * tunnel is stored in a \c context structure. - * - * The \c context structure is created in the \c main() function. That is - * also where process-wide initialization takes place, such as parsing - * command line %options and reading configuration files. The \c context - * is then passed to \c tunnel_point_to_point() which drives OpenVPN's - * main event processing loop. These functions are both part of the \link - * eventloop Main Event Loop\endlink module. - * - * @subsection tunnel_state_client_init Initialization and cleanup - * - * Because there is only one \c context structure present, it can be - * initialized and cleaned up from the client's main event processing - * function. Before the \c tunnel_point_to_point() function enters its - * event loop, it calls \c init_instance_handle_signals() which calls \c - * init_instance() to initialize the single \c context structure. After - * the event loop stops, it calls \c close_instance() to clean up the \c - * context. - * - * @subsection tunnel_state_client_event Event processing - * - * When the main event processing loop activates the external or internal - * multiplexer to handle a network event, it is not necessary to determine - * which VPN tunnel the event is associated with, because there is only - * one VPN tunnel active. - * - * @section tunnel_state_server Server-mode state - * - * An OpenVPN process running in server-mode can manage multiple - * simultaneously active VPN tunnels. For every VPN tunnel active, in - * other words for every OpenVPN client which is connected to a server, - * the OpenVPN server has one \c context structure in which it stores that - * particular VPN tunnel's state information. - * - * @subsection tunnel_state_server_multi Multi_context and multi_instance structures - * - * To support multiple \c context structures, each is wrapped in a \c - * multi_instance structure, and all the \c multi_instance structures are - * registered in one single \c multi_context structure. The \link - * external_multiplexer External Multiplexer\endlink and \link - * internal_multiplexer Internal Multiplexer\endlink then use the \c - * multi_context to retrieve the correct \c multi_instance and \c context - * associated with a given network address. - * - * @subsection tunnel_state_server_init Startup and initialization - * - * An OpenVPN process running in server-mode starts in the same \c main() - * function as it would in client-mode. The same process-wide - * initialization is performed, and the resulting state and configuration - * is stored in a \c context structure. The server-mode and client-mode - * processes diverge when the \c main() function calls one of \c - * tunnel_point_to_point() or \c tunnel_server(). - * - * In server-mode, \c main() calls the \c tunnel_server() function, which - * transfers control to \c tunnel_server_udp_single_threaded() or \c - * tunnel_server_tcp() depending on the external transport protocol. - * - * These functions receive the \c context created in \c main(). This - * object has a special status in server-mode, as it does not represent an - * active VPN tunnel, but does contain process-wide configuration - * parameters. In the source code, it is often stored in "top" variables. - * To distinguish this object from other instances of the same type, its - * \c context.mode value is set to \c CM_TOP. Other \c context objects, - * which do represent active VPN tunnels, have a \c context.mode set to \c - * CM_CHILD_UDP or \c CM_CHILD_TCP, depending on the external transport - * protocol. - * - * Both \c tunnel_server_udp_single_threaded() and \c tunnel_server_tcp() - * perform similar initialization. In either case, a \c multi_context - * structure is created, and it is initialized according to the - * configuration stored in the top \c context by the \c multi_init() and - * \c multi_top_init() functions. - * - * @subsection tunnel_state_server_tunnels Creating and destroying VPN tunnels - * - * When an OpenVPN client makes a new connection to a server, the server - * creates a new \c context and \c multi_instance. The latter is - * registered in the \c multi_context, which makes it possible for the - * external and internal multiplexers to retrieve the correct \c - * multi_instance and \c context when a network event occurs. - * - * @subsection tunnel_state_server_cleanup Final cleanup - * - * After the main event loop exits, both \c - * tunnel_server_udp_single_threaded() and \c tunnel_server_tcp() perform - * similar cleanup. They call \c multi_uninit() followed by \c - * multi_top_free() to clean up the \c multi_context structure. - */ diff --git a/app/openvpn/doc/doxygen/openvpn.doxyfile b/app/openvpn/doc/doxygen/openvpn.doxyfile deleted file mode 100644 index 5d87172c..00000000 --- a/app/openvpn/doc/doxygen/openvpn.doxyfile +++ /dev/null @@ -1,279 +0,0 @@ -# Doxyfile 1.5.5 - -#--------------------------------------------------------------------------- -# Project related configuration options -#--------------------------------------------------------------------------- -DOXYFILE_ENCODING = UTF-8 -PROJECT_NAME = "OpenVPN" -PROJECT_NUMBER = -OUTPUT_DIRECTORY = doxygen -CREATE_SUBDIRS = NO -OUTPUT_LANGUAGE = English -BRIEF_MEMBER_DESC = YES -REPEAT_BRIEF = YES -ABBREVIATE_BRIEF = "The $name class" \ - "The $name widget" \ - "The $name file" \ - is \ - provides \ - specifies \ - contains \ - represents \ - a \ - an \ - the -ALWAYS_DETAILED_SEC = NO -INLINE_INHERITED_MEMB = NO -FULL_PATH_NAMES = YES -STRIP_FROM_PATH = "" -STRIP_FROM_INC_PATH = -SHORT_NAMES = NO -JAVADOC_AUTOBRIEF = YES # 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