#include <winioctl.h>
#include <tap-windows.h>
#include <setupapi.h>
#include <cfgmgr32.h>
#include "buffer.h"
#include "error.h"
#include "mtu.h"
#include "win32.h"
#include "event.h"
#include "proto.h"
#include "misc.h"
#include "networking.h"
#include "ring_buffer.h"
#include "dco.h"

Include dependency graph for tun.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	tuntap_options

struct	afunix_context

struct	tuntap

struct	tap_reg

struct	panel_reg

struct	device_instance_id_interface

Macros
#define	WINTUN_COMPONENT_ID "wintun"

#define	DCO_WIN_REFERENCE_STRING "ovpn-dco"

#define	TUN_ADAPTER_INDEX_INVALID ((DWORD)-1)

#define	IPW32_SET_ADAPTIVE_DELAY_WINDOW 300

#define	IPW32_SET_ADAPTIVE_TRY_NETSH 20

#define	DHCP_OPTIONS_DHCP_OPTIONAL (1<<0)

#define	DHCP_OPTIONS_DHCP_REQUIRED (1<<1)

#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_ADAPTIVE 4 /* "--ip-win32 adaptive" */

#define	IPW32_SET_N 5

#define	N_DHCP_ADDR

#define	N_SEARCH_LIST_LEN 10 /* Max # of entries in domin-search list */

#define	TUNNEL_TYPE(tt) ((tt) ? ((tt)->type) : DEV_TYPE_UNDEF)

#define	TUNNEL_TOPOLOGY(tt) ((tt) ? ((tt)->topology) : TOP_UNDEF)

#define	IFCONFIG_BEFORE_TUN_OPEN 0

#define	IFCONFIG_AFTER_TUN_OPEN 1

#define	IFCONFIG_DEFAULT IFCONFIG_AFTER_TUN_OPEN

#define	ROUTE_BEFORE_TUN 0

#define	ROUTE_AFTER_TUN 1

#define	ROUTE_ORDER_DEFAULT ROUTE_AFTER_TUN

Typedefs
typedef struct afunix_context	afunix_context_t

Enumerations
enum	tun_driver_type { WINDOWS_DRIVER_UNSPECIFIED , WINDOWS_DRIVER_TAP_WINDOWS6 , WINDOWS_DRIVER_WINTUN , DRIVER_GENERIC_TUNTAP , DRIVER_AFUNIX , DRIVER_NULL , DRIVER_DCO , DRIVER_UTUN }

Functions
static bool	tuntap_defined (const struct tuntap *tt)

static bool	tuntap_is_wintun (struct tuntap *tt)

static bool	tuntap_ring_empty (struct tuntap *tt)

void	open_tun (const char dev, const char dev_type, const char dev_node, struct tuntap tt, openvpn_net_ctx_t *ctx)

void	close_tun (struct tuntap tt, openvpn_net_ctx_t ctx)

void	tun_open_device (struct tuntap tt, const char dev_node, const char *device_guid, struct gc_arena gc)

void	close_tun_handle (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, int persist_mode, const char username, const char groupname, const struct tuntap_options options, openvpn_net_ctx_t *ctx)

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, const char dev_type, int topology, const char ifconfig_local_parm, const char ifconfig_remote_netmask_parm, const char ifconfig_ipv6_local_parm, int ifconfig_ipv6_netbits_parm, const char ifconfig_ipv6_remote_parm, struct addrinfo local_public, struct addrinfo remote_public, const bool strict_warn, struct env_set es, openvpn_net_ctx_t ctx, struct tuntap *tt)

void	init_tun_post (struct tuntap tt, const struct frame frame, const struct tuntap_options *options)

void	do_ifconfig_setenv (const struct tuntap tt, struct env_set es)

void	do_ifconfig (struct tuntap tt, const char ifname, int tun_mtu, const struct env_set es, openvpn_net_ctx_t ctx)
	do_ifconfig - configure the tunnel interface

void	undo_ifconfig (struct tuntap tt, openvpn_net_ctx_t ctx)
	undo_ifconfig - undo configuration of the tunnel interface

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)

bool	is_tun_p2p (const struct tuntap *tt)

void	warn_on_use_of_common_subnets (openvpn_net_ctx_t *ctx)

const char *	print_tun_backend_driver (enum tun_driver_type driver)
	Return a string representation of the tun backed driver type.

static int	ifconfig_order (struct tuntap *tt)

static int	route_order (struct tuntap *tt)

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)

const IP_ADAPTER_INFO *	get_adapter_info (DWORD index, struct gc_arena *gc)

const IP_PER_ADAPTER_INFO *	get_per_adapter_info (const DWORD index, struct gc_arena *gc)

const IP_ADAPTER_INFO *	get_adapter (const IP_ADAPTER_INFO *ai, DWORD index)

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, in_addr_t *netmask)

void	show_tap_win_adapters (int msglev, int warnlev)

void	show_adapters (int msglev)

void	tap_allow_nonadmin_access (const char *dev_node)

void	show_valid_win32_tun_subnets (void)

const char *	tap_win_getinfo (const struct tuntap tt, struct gc_arena gc)

void	tun_show_debug (struct tuntap *tt)

bool	dhcp_release_by_adapter_index (const DWORD adapter_index)

bool	dhcp_renew_by_adapter_index (const DWORD adapter_index)

void	fork_register_dns_action (struct tuntap *tt)

void	ipconfig_register_dns (const struct env_set *es)

void	tun_standby_init (struct tuntap *tt)

bool	tun_standby (struct tuntap *tt)

int	tun_read_queue (struct tuntap *tt, int maxsize)

int	tun_write_queue (struct tuntap tt, struct buffer buf)

static bool	tuntap_stop (int status)

static bool	tuntap_abort (int status)

int	tun_write_win32 (struct tuntap tt, struct buffer buf)

static ULONG	wintun_ring_packet_align (ULONG size)

static ULONG	wintun_ring_wrap (ULONG value)

static void	read_wintun (struct tuntap tt, struct buffer buf)

static bool	is_ip_packet_valid (const struct buffer *buf)

static int	write_wintun (struct tuntap tt, struct buffer buf)

static int	write_tun_buffered (struct tuntap tt, struct buffer buf)

static bool	tuntap_is_dco_win (struct tuntap *tt)

static bool	tuntap_is_dco_win_timeout (struct tuntap *tt, int status)

static event_t	tun_event_handle (const struct tuntap *tt)

static void	tun_set (struct tuntap tt, struct event_set es, unsigned int rwflags, void arg, unsigned int persistent)

const char *	tun_stat (const struct tuntap tt, unsigned int rwflags, struct gc_arena gc)

bool	tun_name_is_fixed (const char *dev)

static bool	is_tun_type_set (const struct tuntap *tt)

static void	open_tun_null (struct tuntap *tt)

Macro Definition Documentation

◆ DCO_WIN_REFERENCE_STRING

#define DCO_WIN_REFERENCE_STRING "ovpn-dco"

Definition at line 62 of file tun.h.

◆ DHCP_OPTIONS_DHCP_OPTIONAL

#define DHCP_OPTIONS_DHCP_OPTIONAL (1<<0)

Definition at line 74 of file tun.h.

◆ DHCP_OPTIONS_DHCP_REQUIRED

#define DHCP_OPTIONS_DHCP_REQUIRED (1<<1)

Definition at line 75 of file tun.h.

◆ IFCONFIG_AFTER_TUN_OPEN

#define IFCONFIG_AFTER_TUN_OPEN 1

Definition at line 371 of file tun.h.

◆ IFCONFIG_BEFORE_TUN_OPEN

#define IFCONFIG_BEFORE_TUN_OPEN 0

Definition at line 370 of file tun.h.

◆ IFCONFIG_DEFAULT

#define IFCONFIG_DEFAULT IFCONFIG_AFTER_TUN_OPEN

Definition at line 373 of file tun.h.

◆ IPW32_SET_ADAPTIVE

#define IPW32_SET_ADAPTIVE 4 /* "--ip-win32 adaptive" */

Definition at line 85 of file tun.h.

◆ IPW32_SET_ADAPTIVE_DELAY_WINDOW

#define IPW32_SET_ADAPTIVE_DELAY_WINDOW 300

Definition at line 70 of file tun.h.

◆ IPW32_SET_ADAPTIVE_TRY_NETSH

#define IPW32_SET_ADAPTIVE_TRY_NETSH 20

Definition at line 71 of file tun.h.

◆ IPW32_SET_DHCP_MASQ

#define IPW32_SET_DHCP_MASQ 3 /* "--ip-win32 dynamic" */

Definition at line 84 of file tun.h.

◆ IPW32_SET_IPAPI

#define IPW32_SET_IPAPI 2 /* "--ip-win32 ipapi" */

Definition at line 83 of file tun.h.

◆ IPW32_SET_MANUAL

#define IPW32_SET_MANUAL 0 /* "--ip-win32 manual" */

Definition at line 81 of file tun.h.

◆ IPW32_SET_N

#define IPW32_SET_N 5

Definition at line 86 of file tun.h.

◆ IPW32_SET_NETSH

#define IPW32_SET_NETSH 1 /* "--ip-win32 netsh" */

Definition at line 82 of file tun.h.

◆ N_DHCP_ADDR

#define N_DHCP_ADDR

Value:

4 /* Max # of addresses allowed for

* DNS, WINS, etc. */

Definition at line 111 of file tun.h.

◆ N_SEARCH_LIST_LEN

#define N_SEARCH_LIST_LEN 10 /* Max # of entries in domin-search list */

Definition at line 129 of file tun.h.

◆ ROUTE_AFTER_TUN

#define ROUTE_AFTER_TUN 1

Definition at line 402 of file tun.h.

◆ ROUTE_BEFORE_TUN

#define ROUTE_BEFORE_TUN 0

Definition at line 401 of file tun.h.

◆ ROUTE_ORDER_DEFAULT

#define ROUTE_ORDER_DEFAULT ROUTE_AFTER_TUN

Definition at line 403 of file tun.h.

◆ TUN_ADAPTER_INDEX_INVALID

#define TUN_ADAPTER_INDEX_INVALID ((DWORD)-1)

Definition at line 67 of file tun.h.

◆ TUNNEL_TOPOLOGY

#define TUNNEL_TOPOLOGY ( tt ) ((tt) ? ((tt)->topology) : TOP_UNDEF)

Definition at line 185 of file tun.h.

◆ TUNNEL_TYPE

#define TUNNEL_TYPE ( tt ) ((tt) ? ((tt)->type) : DEV_TYPE_UNDEF)

Definition at line 182 of file tun.h.

◆ WINTUN_COMPONENT_ID

#define WINTUN_COMPONENT_ID "wintun"

Definition at line 61 of file tun.h.

Typedef Documentation

◆ afunix_context_t

typedef struct afunix_context afunix_context_t

Enumeration Type Documentation

◆ tun_driver_type

enum tun_driver_type

Enumerator
WINDOWS_DRIVER_UNSPECIFIED
WINDOWS_DRIVER_TAP_WINDOWS6
WINDOWS_DRIVER_WINTUN
DRIVER_GENERIC_TUNTAP
DRIVER_AFUNIX	using an AF_UNIX socket to pass packets from/to an external program. This is always defined. We error out if a user tries to open this type of backend on unsupported platforms.
DRIVER_NULL
DRIVER_DCO
DRIVER_UTUN	macOS internal tun driver

Definition at line 45 of file tun.h.

Function Documentation

◆ adapter_index_of_ip()

DWORD adapter_index_of_ip	(	const IP_ADAPTER_INFO *	list,
		const in_addr_t	ip,
		int *	count,
		in_addr_t *	netmask
	)

Definition at line 4745 of file tun.c.

References D_ROUTE_DEBUG, dmsg, gc, gc_free(), gc_new(), get_interface_metric(), is_ip_in_adapter_subnet(), gc_arena::list, print_in_addr_t(), and TUN_ADAPTER_INDEX_INVALID.

Referenced by test_route().

◆ ascii2ipset()

int ascii2ipset ( const char * name )

Definition at line 7009 of file tun.c.

References ASSERT, IPW32_SET_N, ipset_names::short_form, and SIZE.

Referenced by add_option().

◆ close_tun()

void close_tun	(	struct tuntap *	tt,
		openvpn_net_ctx_t *	ctx
	)

◆ close_tun_handle()

void close_tun_handle ( struct tuntap * tt )

Definition at line 6865 of file tun.c.

References tuntap::backend_driver, D_WIN32_IO_LOW, dmsg, tuntap::hand, M_ERRNO, M_WARN, msg, overlapped_io_close(), print_tun_backend_driver(), rw_handle::read, tuntap::reads, tuntap::rw_handle, WINDOWS_DRIVER_WINTUN, tuntap::wintun_receive_ring, tuntap::wintun_receive_ring_handle, tuntap::wintun_send_ring, tuntap::wintun_send_ring_handle, rw_handle::write, and tuntap::writes.

Referenced by close_tun().

◆ dev_type_enum()

int dev_type_enum	(	const char *	dev,
		const char *	dev_type
	)

Definition at line 467 of file tun.c.

References DEV_TYPE_TAP, DEV_TYPE_TUN, DEV_TYPE_UNDEF, and is_dev_type().

Referenced by dev_type_string(), do_init_route_list(), do_persist_tuntap(), guess_tuntap_dev(), helper_client_server(), helper_setdefault_topology(), init_tun(), multi_init(), options_postprocess_mutate_ce(), options_postprocess_mutate_invariant(), and options_postprocess_verify_ce().

◆ dev_type_string()

const char * dev_type_string	(	const char *	dev,
		const char *	dev_type
	)

Definition at line 486 of file tun.c.

References dev_type_enum(), DEV_TYPE_TAP, and DEV_TYPE_TUN.

Referenced by do_open_tun(), open_tun_afunix(), and options_string().

◆ dhcp_release_by_adapter_index()

bool dhcp_release_by_adapter_index ( const DWORD adapter_index )

Definition at line 5163 of file tun.c.

References D_TUNTAP_INFO, gc, gc_free(), gc_new(), get_interface_info(), M_WARN, msg, status, and strerror_win32().

Referenced by add_option(), and dhcp_release().

◆ dhcp_renew_by_adapter_index()

bool dhcp_renew_by_adapter_index ( const DWORD adapter_index )

Definition at line 5203 of file tun.c.

References D_TUNTAP_INFO, gc, gc_free(), gc_new(), get_interface_info(), M_WARN, msg, status, and strerror_win32().

Referenced by add_option(), and dhcp_renew().

◆ do_ifconfig()

void do_ifconfig	(	struct tuntap *	tt,
		const char *	ifname,
		int	tun_mtu,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx
	)

do_ifconfig - configure the tunnel interface

Parameters

tt	the tuntap interface context
ifname	the human readable interface name
tun_mtu	the MTU value to set the interface to
es	the environment to be used when executing the commands
ctx	the networking API opaque context

Definition at line 1606 of file tun.c.

References D_LOW, tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, do_ifconfig_ipv4(), do_ifconfig_ipv6(), es, tuntap::local, tuntap::local_ipv6, management_set_state(), msg, net_ctx_free(), and OPENVPN_STATE_ASSIGN_IP.

Referenced by do_open_tun().

◆ do_ifconfig_setenv()

void do_ifconfig_setenv	(	const struct tuntap *	tt,
		struct env_set *	es
	)

Definition at line 750 of file tun.c.

References tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, es, gc, gc_free(), gc_new(), is_tun_p2p(), tuntap::local, tuntap::local_ipv6, tuntap::netbits_ipv6, print_in6_addr(), print_in_addr_t(), tuntap::remote_ipv6, tuntap::remote_netmask, setenv_int(), and setenv_str().

Referenced by do_open_tun(), and init_tun().

◆ fork_register_dns_action()

void fork_register_dns_action ( struct tuntap * tt )

Definition at line 6047 of file tun.c.

References alloc_buf_gc(), BSTR, buf_printf(), fork_to_self(), gc, gc_free(), gc_new(), buffer::len, tuntap_options::msg_channel, tuntap::options, tuntap_options::register_dns, and register_dns_service().

Referenced by initialization_sequence_completed().

◆ get_adapter()

const IP_ADAPTER_INFO * get_adapter	(	const IP_ADAPTER_INFO *	ai,
		DWORD	index
	)

Definition at line 4550 of file tun.c.

References TUN_ADAPTER_INDEX_INVALID.

Referenced by get_adapter_info(), get_default_gateway(), get_tun_adapter(), and netsh_ifconfig().

◆ get_adapter_info()

const IP_ADAPTER_INFO * get_adapter_info	(	DWORD	index,
		struct gc_arena *	gc
	)

Definition at line 4569 of file tun.c.

References gc, get_adapter(), and get_adapter_info_list().

Referenced by delete_temp_addresses(), dhcp_status(), and get_bypass_addresses().

◆ get_adapter_info_list()

const IP_ADAPTER_INFO * get_adapter_info_list ( struct gc_arena * gc )

Definition at line 4436 of file tun.c.

References gc, gc_malloc(), M_INFO, msg, status, and strerror_win32().

Referenced by get_adapter_index_method_2(), get_adapter_info(), get_default_gateway(), netsh_ifconfig(), show_adapters(), test_routes(), and windows_route_find_if_index().

◆ get_per_adapter_info()

const IP_PER_ADAPTER_INFO * get_per_adapter_info	(	const DWORD	index,
		struct gc_arena *	gc
	)

Definition at line 4463 of file tun.c.

References gc, gc_malloc(), M_INFO, msg, status, strerror_win32(), and TUN_ADAPTER_INDEX_INVALID.

Referenced by get_bypass_addresses(), netsh_ifconfig(), and show_adapter().

◆ get_tun_adapter()

const IP_ADAPTER_INFO * get_tun_adapter	(	const struct tuntap *	tt,
		const IP_ADAPTER_INFO *	list
	)

Definition at line 4654 of file tun.c.

References tuntap::adapter_index, and get_adapter().

Referenced by is_adapter_up(), and windows_route_find_if_index().

◆ guess_tuntap_dev()

const char * guess_tuntap_dev	(	const char *	dev,
		const char *	dev_type,
		const char *	dev_node,
		struct gc_arena *	gc
	)

Definition at line 506 of file tun.c.

References dev_type_enum(), DEV_TYPE_TAP, DEV_TYPE_TUN, gc, and netsh_get_id().

Referenced by do_open_tun().

◆ ifconfig_options_string()

const char * ifconfig_options_string	(	const struct tuntap *	tt,
		bool	remote,
		bool	disable,
		struct gc_arena *	gc
	)

Definition at line 653 of file tun.c.

References alloc_buf_gc(), BSTR, buf_printf(), DEV_TYPE_TUN, gc, is_tun_p2p(), buffer::len, and print_in_addr_t().

Referenced by options_string().

◆ ifconfig_order()

static int ifconfig_order ( struct tuntap * tt )

inlinestatic

Definition at line 376 of file tun.h.

References tuntap::backend_driver, DRIVER_AFUNIX, IFCONFIG_AFTER_TUN_OPEN, IFCONFIG_BEFORE_TUN_OPEN, and IFCONFIG_DEFAULT.

Referenced by do_open_tun().

◆ init_tun()

struct tuntap * init_tun	(	const char *	dev,
		const char *	dev_type,
		int	topology,
		const char *	ifconfig_local_parm,
		const char *	ifconfig_remote_netmask_parm,
		const char *	ifconfig_ipv6_local_parm,
		int	ifconfig_ipv6_netbits_parm,
		const char *	ifconfig_ipv6_remote_parm,
		struct addrinfo *	local_public,
		struct addrinfo *	remote_public,
		const bool	strict_warn,
		struct env_set *	es,
		openvpn_net_ctx_t *	ctx,
		struct tuntap *	tt
	)

Definition at line 794 of file tun.c.

References tuntap::adapter_netmask, ALLOC_OBJ, check_addr_clash(), clear_tuntap(), dev_type_enum(), tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, do_ifconfig_setenv(), es, getaddr(), GETADDR_FATAL, GETADDR_FATAL_ON_SIGNAL, GETADDR_HOST_ORDER, GETADDR_RESOLVE, ifconfig_sanity_check(), is_tun_p2p(), tuntap::local, tuntap::local_ipv6, M_FATAL, msg, tuntap::netbits_ipv6, tuntap::remote_ipv6, tuntap::remote_netmask, tuntap::topology, tuntap::type, and verify_255_255_255_252().

Referenced by do_init_tun(), and options_string().

◆ init_tun_post()

void init_tun_post	(	struct tuntap *	tt,
		const struct frame *	frame,
		const struct tuntap_options *	options
	)

Definition at line 940 of file tun.c.

References tuntap::adapter_index, tuntap::backend_driver, tuntap::dco, DRIVER_DCO, M_FATAL, msg, tuntap::options, overlapped_io::overlapped, overlapped_io_init(), rw_handle::read, tuntap::reads, tuntap::rw_handle, TUN_ADAPTER_INDEX_INVALID, WINDOWS_DRIVER_WINTUN, tuntap::wintun_receive_ring_handle, tuntap::wintun_send_ring_handle, rw_handle::write, and tuntap::writes.

Referenced by do_init_tun().

◆ ipconfig_register_dns()

void ipconfig_register_dns ( const struct env_set * es )

Definition at line 5269 of file tun.c.

References argv_free(), argv_msg(), argv_new(), argv_printf(), D_TUNTAP_INFO, es, get_win_sys_path(), msg, netcmd_semaphore_lock(), netcmd_semaphore_release(), openvpn_execve_check(), and WIN_IPCONFIG_PATH_SUFFIX.

Referenced by add_option().

◆ ipset2ascii()

const char * ipset2ascii ( int index )

Definition at line 7024 of file tun.c.

References ASSERT, IPW32_SET_N, ipset_names::short_form, and SIZE.

Referenced by ipset2ascii_all().

◆ ipset2ascii_all()

const char * ipset2ascii_all ( struct gc_arena * gc )

Definition at line 7038 of file tun.c.

References alloc_buf_gc(), ASSERT, BSTR, buf_printf(), gc, ipset2ascii(), IPW32_SET_N, buffer::len, and SIZE.

Referenced by add_option().

◆ is_adapter_up()

bool is_adapter_up	(	const struct tuntap *	tt,
		const IP_ADAPTER_INFO *	list
	)

Definition at line 4667 of file tun.c.

References tuntap::adapter_netmask, get_adapter_ip_netmask(), get_adapter_n_ip_netmask(), get_tun_adapter(), and tuntap::local.

Referenced by test_routes().

◆ is_dev_type()

bool is_dev_type	(	const char *	dev,
		const char *	dev_type,
		const char *	match_type
	)

Definition at line 449 of file tun.c.

References ASSERT.

Referenced by dev_type_enum(), and do_init_tun().

◆ is_ip_in_adapter_subnet()

bool is_ip_in_adapter_subnet	(	const IP_ADAPTER_INFO *	ai,
		const in_addr_t	ip,
		in_addr_t *	highest_netmask
	)

Definition at line 4712 of file tun.c.

References get_adapter_ip_netmask(), and get_adapter_n_ip_netmask().

Referenced by adapter_index_of_ip(), and windows_route_find_if_index().

◆ is_ip_packet_valid()

static bool is_ip_packet_valid ( const struct buffer * buf )

inlinestatic

Definition at line 596 of file tun.h.

References BLEN, BPTR, OPENVPN_IPH_GET_VER, and openvpn_iphdr::version_len.

Referenced by write_wintun().

◆ is_tun_p2p()

bool is_tun_p2p ( const struct tuntap * tt )

Definition at line 726 of file tun.c.

References DEV_TYPE_TAP, DEV_TYPE_TUN, buffer::len, M_FATAL, msg, and TOP_SUBNET.

Referenced by do_ifconfig_ipv4(), do_ifconfig_setenv(), ifconfig_options_string(), init_tun(), and undo_ifconfig_ipv4().

◆ is_tun_type_set()

static bool is_tun_type_set ( const struct tuntap * tt )

inlinestatic

Definition at line 782 of file tun.h.

References DEV_TYPE_UNDEF, and tuntap::type.

Referenced by can_preserve_tun(), and do_close_tun().

◆ open_tun()

void open_tun	(	const char *	dev,
		const char *	dev_type,
		const char *	dev_node,
		struct tuntap *	tt,
		openvpn_net_ctx_t *	ctx
	)

Definition at line 6731 of file tun.c.

References tuntap::backend_driver, DEV_TYPE_TAP, DEV_TYPE_TUN, tuntap_options::dhcp_options, DHCP_OPTIONS_DHCP_REQUIRED, gc, gc_free(), gc_new(), M_FATAL, M_INFO, M_NOPREFIX, M_WARN, msg, tuntap::options, print_tun_backend_driver(), tun_open_device(), tuntap_is_dco_win(), tuntap_post_open(), tuntap::type, and WINDOWS_DRIVER_TAP_WINDOWS6.

Referenced by open_tun_backend().

◆ open_tun_null()

static void open_tun_null ( struct tuntap * tt )

inlinestatic

Definition at line 788 of file tun.h.

References tuntap::actual_name, and string_alloc().

Referenced by open_tun_backend().

◆ print_tun_backend_driver()

const char * print_tun_backend_driver ( enum tun_driver_type driver )

Return a string representation of the tun backed driver type.

Definition at line 59 of file tun.c.

References DRIVER_AFUNIX, DRIVER_DCO, DRIVER_GENERIC_TUNTAP, DRIVER_NULL, DRIVER_UTUN, WINDOWS_DRIVER_TAP_WINDOWS6, and WINDOWS_DRIVER_WINTUN.

Referenced by close_tun_handle(), do_close_tun_simple(), get_tap_reg(), open_tun(), open_tun_backend(), options_postprocess_verify_ce(), show_tap_win_adapters(), tun_open_device(), and tun_try_open_device().

◆ read_tun()

int read_tun	(	struct tuntap *	tt,
		uint8_t *	buf,
		int	len
	)

Referenced by read_incoming_tun().

◆ read_wintun()

static void read_wintun	(	struct tuntap *	tt,
		struct buffer *	buf
	)

inlinestatic

Definition at line 540 of file tun.h.

References overlapped_io::buf_init, buf_write(), TUN_PACKET::data, tun_ring::data, tun_ring::head, buffer::len, M_INFO, msg, tuntap::reads, TUN_PACKET::size, tun_ring::tail, WINTUN_MAX_PACKET_SIZE, WINTUN_RING_CAPACITY, wintun_ring_packet_align(), wintun_ring_wrap(), and tuntap::wintun_send_ring.

Referenced by read_incoming_tun().

◆ route_order()

static int route_order ( struct tuntap * tt )

inlinestatic

Definition at line 406 of file tun.h.

References tuntap::backend_driver, DRIVER_AFUNIX, ROUTE_BEFORE_TUN, and ROUTE_ORDER_DEFAULT.

Referenced by do_open_tun(), and do_up().

◆ show_adapters()

void show_adapters ( int msglev )

Definition at line 5012 of file tun.c.

References gc, gc_free(), gc_new(), get_adapter_info_list(), msg, and show_adapter().

Referenced by add_option(), check_add_routes(), do_route(), initialization_sequence_completed(), and management_show_net_callback().

◆ show_tap_win_adapters()

void show_tap_win_adapters	(	int	msglev,
		int	warnlev
	)

Definition at line 4157 of file tun.c.

References gc, gc_free(), gc_new(), get_panel_reg(), get_tap_reg(), tap_reg::guid, panel_reg::guid, msg, panel_reg::name, tap_reg::next, panel_reg::next, print_tun_backend_driver(), and tap_reg::windows_driver.

Referenced by add_option().

◆ show_valid_win32_tun_subnets()

void show_valid_win32_tun_subnets ( void )

Definition at line 4124 of file tun.c.

Referenced by add_option().

◆ tap_allow_nonadmin_access()

void tap_allow_nonadmin_access ( const char * dev_node )

Definition at line 5061 of file tun.c.

References at_least_one_tap_win(), gc, gc_free(), gc_new(), get_device_guid(), get_panel_reg(), get_tap_reg(), get_unspecified_device_guid(), M_ERR, M_FATAL, M_WARN, msg, and tap_allow_nonadmin_access_handle().

Referenced by add_option().

◆ tap_win_getinfo()

const char * tap_win_getinfo	(	const struct tuntap *	tt,
		struct gc_arena *	gc
	)

Definition at line 6770 of file tun.c.

References alloc_buf_gc(), tuntap::backend_driver, BCAP, BSTR, gc, buffer::len, and WINDOWS_DRIVER_TAP_WINDOWS6.

Referenced by print_status(), and x_check_status().

◆ tun_event_handle()

static event_t tun_event_handle ( const struct tuntap * tt )

inlinestatic

Definition at line 738 of file tun.h.

References tuntap::rw_handle.

Referenced by tun_set().

◆ tun_name_is_fixed()

bool tun_name_is_fixed ( const char * dev )

Definition at line 1830 of file tun.c.

References has_digit().

◆ tun_open_device()

void tun_open_device	(	struct tuntap *	tt,
		const char *	dev_node,
		const char **	device_guid,
		struct gc_arena *	gc
	)

Definition at line 6565 of file tun.c.

References tuntap::actual_name, tuntap::adapter_index, at_least_one_tap_win(), tuntap::backend_driver, gc, get_adapter_index(), get_device_guid(), get_device_instance_id_interface(), get_panel_reg(), get_tap_reg(), get_unspecified_device_guid(), M_FATAL, msg, device_instance_id_interface::next, print_tun_backend_driver(), string_alloc(), tun_try_open_device(), and WINDOWS_DRIVER_UNSPECIFIED.

Referenced by create_socket_dco_win(), open_tun(), and ovpn_dco_init_mp().

◆ tun_read_queue()

int tun_read_queue	(	struct tuntap *	tt,
		int	maxsize
	)

Definition at line 3542 of file tun.c.

References ASSERT, BLEN, BPTR, overlapped_io::buf, overlapped_io::buf_init, D_WIN32_IO, dmsg, gc, gc_free(), gc_new(), tuntap::hand, overlapped_io::iostate, IOSTATE_IMMEDIATE_RETURN, IOSTATE_INITIAL, IOSTATE_QUEUED, overlapped_io::overlapped, tuntap::reads, overlapped_io::size, overlapped_io::status, status, and strerror_win32().

Referenced by tun_set().

◆ tun_set()

static void tun_set	(	struct tuntap *	tt,
		struct event_set *	es,
		unsigned int	rwflags,
		void *	arg,
		unsigned int *	persistent
	)

inlinestatic

Definition at line 748 of file tun.h.

References tuntap::backend_driver, es, event_ctl(), EVENT_READ, tuntap::rwflags_debug, tun_event_handle(), tun_read_queue(), tuntap_defined(), tuntap_is_dco_win(), and WINDOWS_DRIVER_TAP_WINDOWS6.

Referenced by multi_io_process_flags(), and multi_io_wait().

◆ tun_show_debug()

void tun_show_debug ( struct tuntap * tt )

Definition at line 6788 of file tun.c.

References alloc_buf(), BCAP, BSTR, D_TAP_WIN_DEBUG, free_buf(), buffer::len, msg, and WINDOWS_DRIVER_TAP_WINDOWS6.

Referenced by pre_select().

◆ tun_standby()

bool tun_standby ( struct tuntap * tt )

Definition at line 5740 of file tun.c.

References IPW32_SET_ADAPTIVE, IPW32_SET_ADAPTIVE_TRY_NETSH, buffer::len, M_INFO, msg, netsh_ifconfig(), NI_IP_NETMASK, NI_OPTIONS, and NI_TEST_FIRST.

Referenced by check_add_routes().

◆ tun_standby_init()

void tun_standby_init ( struct tuntap * tt )

Definition at line 5734 of file tun.c.

References buffer::len.

Referenced by do_up().

◆ tun_stat()

const char * tun_stat	(	const struct tuntap *	tt,
		unsigned int	rwflags,
		struct gc_arena *	gc
	)

Definition at line 691 of file tun.c.

References alloc_buf_gc(), BSTR, buf_printf(), EVENT_READ, EVENT_WRITE, gc, buffer::len, and overlapped_io_state_ascii().

◆ tun_write_queue()

int tun_write_queue	(	struct tuntap *	tt,
		struct buffer *	buf
	)

Definition at line 3606 of file tun.c.

References ASSERT, BLEN, BPTR, overlapped_io::buf, buf_copy(), overlapped_io::buf_init, D_WIN32_IO, dmsg, gc, gc_free(), gc_new(), tuntap::hand, overlapped_io::iostate, IOSTATE_IMMEDIATE_RETURN, IOSTATE_INITIAL, IOSTATE_QUEUED, buffer::len, overlapped_io::overlapped, overlapped_io::size, overlapped_io::status, status, strerror_win32(), and tuntap::writes.

Referenced by tun_write_win32().

◆ tun_write_win32()

int tun_write_win32	(	struct tuntap *	tt,
		struct buffer *	buf
	)

Definition at line 3669 of file tun.c.

References BLEN, tuntap::hand, sockethandle_t::is_handle, overlapped_io_active(), sockethandle_finalize(), status, tun_write_queue(), and tuntap::writes.

Referenced by write_tun_buffered().

◆ tuncfg()

void tuncfg	(	const char *	dev,
		const char *	dev_type,
		const char *	dev_node,
		int	persist_mode,
		const char *	username,
		const char *	groupname,
		const struct tuntap_options *	options,
		openvpn_net_ctx_t *	ctx
	)