diff options
Diffstat (limited to 'openvpn/tun.h')
| -rw-r--r-- | openvpn/tun.h | 413 |
1 files changed, 0 insertions, 413 deletions
diff --git a/openvpn/tun.h b/openvpn/tun.h deleted file mode 100644 index 76c4867..0000000 --- a/openvpn/tun.h +++ /dev/null @@ -1,413 +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) 2002-2005 OpenVPN Solutions LLC <info@openvpn.net> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program (see the file COPYING included with this - * distribution); if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#ifndef TUN_H -#define TUN_H - -#ifdef WIN32 -#include <winioctl.h> -#include "tap-win32/common.h" -#endif - -#include "buffer.h" -#include "error.h" -#include "mtu.h" -#include "win32.h" -#include "event.h" -#include "proto.h" -#include "misc.h" - -#ifdef WIN32 - -struct tuntap_options { - /* --ip-win32 options */ - bool ip_win32_defined; - -# define IPW32_SET_MANUAL 0 /* "--ip-win32 manual" */ -# define IPW32_SET_NETSH 1 /* "--ip-win32 netsh" */ -# define IPW32_SET_IPAPI 2 /* "--ip-win32 ipapi" */ -# define IPW32_SET_DHCP_MASQ 3 /* "--ip-win32 dynamic" */ -# define IPW32_SET_N 4 - int ip_win32_type; - - /* --ip-win32 dynamic options */ - bool dhcp_masq_custom_offset; - int dhcp_masq_offset; - int dhcp_lease_time; - - /* --tap-sleep option */ - int tap_sleep; - - /* --dhcp-option options */ - - bool dhcp_options; - - const char *domain; /* DOMAIN (15) */ - - const char *netbios_scope; /* NBS (47) */ - - int netbios_node_type; /* NBT 1,2,4,8 (46) */ - -#define N_DHCP_ADDR 4 /* Max # of addresses allowed for - DNS, WINS, etc. */ - - /* DNS (6) */ - in_addr_t dns[N_DHCP_ADDR]; - int dns_len; - - /* WINS (44) */ - in_addr_t wins[N_DHCP_ADDR]; - int wins_len; - - /* NTP (42) */ - in_addr_t ntp[N_DHCP_ADDR]; - int ntp_len; - - /* NBDD (45) */ - in_addr_t nbdd[N_DHCP_ADDR]; - int nbdd_len; - - /* DISABLE_NBT (43, Vendor option 001) */ - bool disable_nbt; - - bool dhcp_renew; - bool dhcp_pre_release; - bool dhcp_release; -}; - -#elif TARGET_LINUX - -struct tuntap_options { - int txqueuelen; -}; - -#else - -struct tuntap_options { - int dummy; /* not used */ -}; - -#endif - -/* - * Define a TUN/TAP dev. - */ - -struct tuntap -{ -# define TUNNEL_TYPE(tt) ((tt) ? ((tt)->type) : DEV_TYPE_UNDEF) - int type; /* DEV_TYPE_x as defined in proto.h */ - - bool did_ifconfig_setup; - bool did_ifconfig; - - bool ipv6; - - struct tuntap_options options; /* options set on command line */ - - char *actual_name; /* actual name of TUN/TAP dev, usually including unit number */ - - /* number of TX buffers */ - int txqueuelen; - - /* ifconfig parameters */ - in_addr_t local; - in_addr_t remote_netmask; - in_addr_t broadcast; - -#ifdef WIN32 - HANDLE hand; - struct overlapped_io reads; - struct overlapped_io writes; - struct rw_handle rw_handle; - - /* used for setting interface address via IP Helper API - or DHCP masquerade */ - bool ipapi_context_defined; - ULONG ipapi_context; - ULONG ipapi_instance; - in_addr_t adapter_netmask; - - /* Windows adapter index for TAP-Win32 adapter, - ~0 if undefined */ - DWORD adapter_index; -#else - int fd; /* file descriptor for TUN/TAP dev */ -#endif - -#ifdef TARGET_SOLARIS - int ip_fd; -#endif - - /* used for printing status info only */ - unsigned int rwflags_debug; - - /* Some TUN/TAP drivers like to be ioctled for mtu - after open */ - int post_open_mtu; -}; - -static inline bool -tuntap_defined (const struct tuntap *tt) -{ -#ifdef WIN32 - return tt && tt->hand != NULL; -#else - return tt && tt->fd >= 0; -#endif -} - -/* - * Function prototypes - */ - -void clear_tuntap (struct tuntap *tuntap); - -void open_tun (const char *dev, const char *dev_type, const char *dev_node, - bool ipv6, struct tuntap *tt); - -void close_tun (struct tuntap *tt); - -int write_tun (struct tuntap* tt, uint8_t *buf, int len); - -int read_tun (struct tuntap* tt, uint8_t *buf, int len); - -void tuncfg (const char *dev, const char *dev_type, const char *dev_node, - bool ipv6, int persist_mode); - -const char *guess_tuntap_dev (const char *dev, - const char *dev_type, - const char *dev_node, - struct gc_arena *gc); - -struct tuntap *init_tun (const char *dev, /* --dev option */ - const char *dev_type, /* --dev-type option */ - const char *ifconfig_local_parm, /* --ifconfig parm 1 */ - const char *ifconfig_remote_netmask_parm, /* --ifconfig parm 2 */ - in_addr_t local_public, - in_addr_t remote_public, - const bool strict_warn, - struct env_set *es); - -void init_tun_post (struct tuntap *tt, - const struct frame *frame, - const struct tuntap_options *options); - -void do_ifconfig (struct tuntap *tt, - const char *actual, /* actual device name */ - int tun_mtu, - const struct env_set *es); - -const char *dev_component_in_dev_node (const char *dev_node); - -bool is_dev_type (const char *dev, const char *dev_type, const char *match_type); -int dev_type_enum (const char *dev, const char *dev_type); -const char *dev_type_string (const char *dev, const char *dev_type); - -const char *ifconfig_options_string (const struct tuntap* tt, bool remote, bool disable, struct gc_arena *gc); - -/* - * Inline functions - */ - -static inline void -tun_adjust_frame_parameters (struct frame* frame, int size) -{ - frame_add_to_extra_tun (frame, size); -} - -/* - * Should ifconfig be called before or after - * tun dev open? - */ - -#define IFCONFIG_BEFORE_TUN_OPEN 0 -#define IFCONFIG_AFTER_TUN_OPEN 1 - -#define IFCONFIG_DEFAULT IFCONFIG_AFTER_TUN_OPEN - -static inline int -ifconfig_order(void) -{ -#if defined(TARGET_LINUX) - return IFCONFIG_AFTER_TUN_OPEN; -#elif defined(TARGET_SOLARIS) - return IFCONFIG_AFTER_TUN_OPEN; -#elif defined(TARGET_OPENBSD) - return IFCONFIG_BEFORE_TUN_OPEN; -#elif defined(TARGET_DARWIN) - return IFCONFIG_AFTER_TUN_OPEN; -#elif defined(TARGET_NETBSD) - return IFCONFIG_AFTER_TUN_OPEN; -#elif defined(WIN32) - return IFCONFIG_BEFORE_TUN_OPEN; -#else - return IFCONFIG_DEFAULT; -#endif -} - -#ifdef WIN32 - -#define TUN_PASS_BUFFER - -struct tap_reg -{ - const char *guid; - struct tap_reg *next; -}; - -struct panel_reg -{ - const char *name; - const char *guid; - struct panel_reg *next; -}; - -int ascii2ipset (const char* name); -const char *ipset2ascii (int index); -const char *ipset2ascii_all (struct gc_arena *gc); - -void verify_255_255_255_252 (in_addr_t local, in_addr_t remote); - -const IP_ADAPTER_INFO *get_adapter_info_list (struct gc_arena *gc); -const IP_ADAPTER_INFO *get_tun_adapter (const struct tuntap *tt, const IP_ADAPTER_INFO *list); -bool is_adapter_up (const struct tuntap *tt, const IP_ADAPTER_INFO *list); -bool is_ip_in_adapter_subnet (const IP_ADAPTER_INFO *ai, const in_addr_t ip, in_addr_t *highest_netmask); -DWORD adapter_index_of_ip (const IP_ADAPTER_INFO *list, const in_addr_t ip, int *count); - -void show_tap_win32_adapters (int msglev, int warnlev); -void show_adapters (int msglev); - -void show_valid_win32_tun_subnets (void); -const char *tap_win32_getinfo (const struct tuntap *tt, struct gc_arena *gc); -void tun_show_debug (struct tuntap *tt); - -bool dhcp_release (const struct tuntap *tt); -bool dhcp_renew (const struct tuntap *tt); - -int tun_read_queue (struct tuntap *tt, int maxsize); -int tun_write_queue (struct tuntap *tt, struct buffer *buf); -int tun_finalize (HANDLE h, struct overlapped_io *io, struct buffer *buf); - -const char *get_netsh_id (const char *dev_node, struct gc_arena *gc); - -static inline bool -tuntap_stop (int status) -{ - /* - * This corresponds to the STATUS_NO_SUCH_DEVICE - * error in tapdrvr.c. - */ - if (status < 0) - { - return openvpn_errno () == ERROR_FILE_NOT_FOUND; - } - return false; -} - -static inline int -tun_write_win32 (struct tuntap *tt, struct buffer *buf) -{ - int err = 0; - int status = 0; - if (overlapped_io_active (&tt->writes)) - { - status = tun_finalize (tt->hand, &tt->writes, NULL); - if (status < 0) - err = GetLastError (); - } - tun_write_queue (tt, buf); - if (status < 0) - { - SetLastError (err); - return status; - } - else - return BLEN (buf); -} - -static inline int -read_tun_buffered (struct tuntap *tt, struct buffer *buf, int maxsize) -{ - return tun_finalize (tt->hand, &tt->reads, buf); -} - -static inline int -write_tun_buffered (struct tuntap *tt, struct buffer *buf) -{ - return tun_write_win32 (tt, buf); -} - -#else - -static inline bool -tuntap_stop (int status) -{ - return false; -} - -#endif - -/* - * TUN/TAP I/O wait functions - */ - -static inline event_t -tun_event_handle (const struct tuntap *tt) -{ -#ifdef WIN32 - return &tt->rw_handle; -#else - return tt->fd; -#endif -} - -static inline unsigned int -tun_set (struct tuntap *tt, - struct event_set *es, - unsigned int rwflags, - void *arg, - unsigned int *persistent) -{ - if (tuntap_defined (tt)) - { - /* if persistent is defined, call event_ctl only if rwflags has changed since last call */ - if (!persistent || *persistent != rwflags) - { - event_ctl (es, tun_event_handle (tt), rwflags, arg); - if (persistent) - *persistent = rwflags; - } -#ifdef WIN32 - if (rwflags & EVENT_READ) - tun_read_queue (tt, 0); -#endif - tt->rwflags_debug = rwflags; - } - return rwflags; -} - -const char *tun_stat (const struct tuntap *tt, unsigned int rwflags, struct gc_arena *gc); - -#endif /* TUN_H */ |