/* *  OpenVPN -- An application to securely tunnel IP networks *             over a single UDP port, with support for TLS-based *             session authentication and key exchange, *             packet encryption, packet authentication, and *             packet compression. * *  Copyright (C) 2002 James Yonan <jim@yonan.net> * *  This program is free software; you can redistribute it and/or modify *  it under the terms of the GNU General Public License as published by *  the Free Software Foundation; either version 2 of the License, or *  (at your option) any later version. * *  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 */#include "basic.h"/* Command line options */struct options{  /* mode parms */  bool persist_config;  int persist_mode;#ifdef USE_CRYPTO  bool askpass;  bool show_ciphers;  bool show_digests;#ifdef USE_SSL  bool show_tls_ciphers;#endif  bool genkey;#endif  /* Networking parms */  const char *local;  const char *remote;  int local_port;  int remote_port;  bool remote_float;  const char *ipchange;  bool bind_local;  const char *dev;  const char *dev_type;  const char *dev_node;  const char *ifconfig_local;  const char *ifconfig_remote;  int shaper;  int tun_mtu;          /* MTU of tun device */  int udp_mtu;          /* MTU of device over which tunnel packets pass via UDP */  bool tun_mtu_defined; /* true if user overriding parm with command line option */  bool udp_mtu_defined; /* true if user overriding parm with command line option */  bool mlock;  int inactivity_timeout;  int ping_send_timeout;        /* Send a UDP ping to remote every n seconds */  int ping_rec_timeout;         /* Expect a UDP ping from remote at least once every n seconds */  bool ping_timer_remote;       /* Run ping timer only if we have a remote address */  bool tun_ipv6;                /* Build tun dev that supports IPv6 */  #define PING_UNDEF   0  #define PING_EXIT    1  #define PING_RESTART 2  int ping_rec_timeout_action;  /* What action to take on ping_rec_timeout (exit or restart)? */  bool persist_tun;             /* Don't close/reopen tun/tap dev on SIGUSR1 or PING_RESTART */  bool persist_local_ip;        /* Don't re-resolve local address on SIGUSR1 or PING_RESTART */  bool persist_remote_ip;       /* Don't re-resolve remote address on SIGUSR1 or PING_RESTART */  bool persist_key;             /* Don't re-read key files on SIGUSR1 or PING_RESTART */  int resolve_retry_seconds;    /* If hostname resolve fails, retry for n seconds */  /* Misc parms */  const char *username;  const char *groupname;  const char *chroot_dir;  const char *cd_dir;  const char *writepid;  const char *up_script;  const char *down_script;  bool daemon;  bool inetd;  int nice;#ifdef USE_PTHREAD  int nice_work;#endif  int verbosity;  int mute;  bool gremlin;#ifdef USE_LZO  bool comp_lzo;  bool comp_lzo_adaptive;#endif#ifdef USE_CRYPTO  /* Cipher parms */  const char *shared_secret_file;  bool ciphername_defined;  const char *ciphername;  bool authname_defined;  const char *authname;  int keysize;  bool packet_id;  bool iv;  bool test_crypto;#ifdef USE_SSL  /* TLS (control channel) parms */  bool tls_server;  bool tls_client;  const char *ca_file;  const char *dh_file;  const char *cert_file;  const char *priv_key_file;  const char *cipher_list;  const char *tls_verify;  /* Per-packet timeout on control channel */  int tls_timeout;  /* Data channel key renegotiation parameters */  int renegotiate_bytes;  int renegotiate_packets;  int renegotiate_seconds;  /* Data channel key handshake must finalize     within n seconds of handshake initiation. */  int handshake_window;  /* Old key allowed to live n seconds after new key goes active */  int transition_window;  /* Special authentication MAC for TLS control channel */  const char *tls_auth_file;		/* shared secret */  /* Allow only one session */  bool single_session;  /* Disable options check between peers */  bool disable_occ;#endif /* USE_SSL */#endif /* USE_CRYPTO */};#define streq(x, y) (!strcmp((x), (y)))void notnull (const char *arg, const char *description);void usage_small ();void init_options (struct options *o);void show_settings (const struct options *o);char *options_string (const struct options *o);void parse_argv (struct options* options, int argc, char *argv[]);bool string_defined_equal (const char *s1, const char *s2);