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The C and C++ Include Header Files

cat -n /usr/include/openvpn/openvpn-msg.h

     1	/*
     2	 *  OpenVPN -- An application to securely tunnel IP networks
     3	 *             over a single TCP/UDP port, with support for SSL/TLS-based
     4	 *             session authentication and key exchange,
     5	 *             packet encryption, packet authentication, and
     6	 *             packet compression.
     7	 *
     8	 *  Copyright (C) 2013-2026 Heiko Hund <heiko.hund@sophos.com>
     9	 *
    10	 *  This program is free software; you can redistribute it and/or modify
    11	 *  it under the terms of the GNU General Public License version 2
    12	 *  as published by the Free Software Foundation.
    13	 *
    14	 *  This program is distributed in the hope that it will be useful,
    15	 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    16	 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17	 *  GNU General Public License for more details.
    18	 *
    19	 *  You should have received a copy of the GNU General Public License along
    20	 *  with this program; if not, see <https://www.gnu.org/licenses/>.
    21	 */
    22	
    23	#ifndef OPENVPN_MSG_H_
    24	#define OPENVPN_MSG_H_
    25	
    26	#include <windef.h>
    27	#include <ws2tcpip.h>
    28	
    29	typedef enum
    30	{
    31	    msg_acknowledgement,
    32	    msg_add_address,
    33	    msg_del_address,
    34	    msg_add_route,
    35	    msg_del_route,
    36	    msg_add_dns_cfg,
    37	    msg_del_dns_cfg,
    38	    msg_add_nrpt_cfg,
    39	    msg_del_nrpt_cfg,
    40	    msg_add_nbt_cfg,
    41	    msg_del_nbt_cfg,
    42	    msg_flush_neighbors,
    43	    msg_add_wfp_block,
    44	    msg_del_wfp_block,
    45	    msg_register_dns,
    46	    msg_enable_dhcp,
    47	    deprecated_msg_register_ring_buffers,
    48	    msg_set_mtu,
    49	    msg_add_wins_cfg,
    50	    msg_del_wins_cfg,
    51	    msg_create_adapter
    52	} message_type_t;
    53	
    54	typedef struct
    55	{
    56	    message_type_t type;
    57	    size_t size;
    58	    int message_id;
    59	} message_header_t;
    60	
    61	typedef union
    62	{
    63	    struct in_addr ipv4;
    64	    struct in6_addr ipv6;
    65	} inet_address_t;
    66	
    67	typedef struct
    68	{
    69	    int index;
    70	    char name[256];
    71	} interface_t;
    72	
    73	typedef enum
    74	{
    75	    wfp_block_local = 1 << 0,
    76	    wfp_block_dns = 1 << 1
    77	} wfp_block_flags_t;
    78	
    79	typedef struct
    80	{
    81	    message_header_t header;
    82	    short family;
    83	    inet_address_t address;
    84	    int prefix_len;
    85	    interface_t iface;
    86	} address_message_t;
    87	
    88	typedef struct
    89	{
    90	    message_header_t header;
    91	    short family;
    92	    inet_address_t prefix;
    93	    int prefix_len;
    94	    inet_address_t gateway;
    95	    interface_t iface;
    96	    int metric;
    97	} route_message_t;
    98	
    99	typedef struct
   100	{
   101	    message_header_t header;
   102	    interface_t iface;
   103	    char domains[512];
   104	    short family;
   105	    int addr_len;
   106	    inet_address_t addr[4]; /* support up to 4 dns addresses */
   107	} dns_cfg_message_t;
   108	
   109	
   110	typedef enum
   111	{
   112	    nrpt_dnssec
   113	} nrpt_flags_t;
   114	
   115	#define NRPT_ADDR_NUM  8  /* Max. number of addresses */
   116	#define NRPT_ADDR_SIZE 48 /* Max. address strlen + some */
   117	typedef char nrpt_address_t[NRPT_ADDR_SIZE];
   118	typedef struct
   119	{
   120	    message_header_t header;
   121	    interface_t iface;
   122	    nrpt_address_t addresses[NRPT_ADDR_NUM];
   123	    char resolve_domains[512]; /* double \0 terminated */
   124	    char search_domains[512];
   125	    nrpt_flags_t flags;
   126	} nrpt_dns_cfg_message_t;
   127	
   128	typedef struct
   129	{
   130	    message_header_t header;
   131	    interface_t iface;
   132	    int addr_len;
   133	    inet_address_t addr[4]; /* support up to 4 dns addresses */
   134	} wins_cfg_message_t;
   135	
   136	typedef struct
   137	{
   138	    message_header_t header;
   139	    interface_t iface;
   140	    int disable_nbt;
   141	    int nbt_type;
   142	    char scope_id[256];
   143	    struct in_addr primary_nbns;
   144	    struct in_addr secondary_nbns;
   145	} nbt_cfg_message_t;
   146	
   147	/* TODO: NTP */
   148	
   149	typedef struct
   150	{
   151	    message_header_t header;
   152	    short family;
   153	    interface_t iface;
   154	} flush_neighbors_message_t;
   155	
   156	typedef struct
   157	{
   158	    message_header_t header;
   159	    int error_number;
   160	} ack_message_t;
   161	
   162	typedef struct
   163	{
   164	    message_header_t header;
   165	    wfp_block_flags_t flags;
   166	    interface_t iface;
   167	} wfp_block_message_t;
   168	
   169	typedef struct
   170	{
   171	    message_header_t header;
   172	    interface_t iface;
   173	} enable_dhcp_message_t;
   174	
   175	typedef struct
   176	{
   177	    message_header_t header;
   178	    interface_t iface;
   179	    short family;
   180	    int mtu;
   181	} set_mtu_message_t;
   182	
   183	typedef enum
   184	{
   185	    ADAPTER_TYPE_DCO,
   186	    ADAPTER_TYPE_TAP,
   187	} adapter_type_t;
   188	
   189	typedef struct
   190	{
   191	    message_header_t header;
   192	    adapter_type_t adapter_type;
   193	} create_adapter_message_t;
   194	
   195	#endif /* ifndef OPENVPN_MSG_H_ */