tun.h File Reference

#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 "dco.h"

Include dependency graph for tun.h:

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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	DCO_WIN_REFERENCE_STRING   "ovpn-dco"
#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   4u
#define	N_SEARCH_LIST_LEN   10 /* Max # of entries in domin-search list */
#define	TUNNEL_TYPE(tt)
#define	TUNNEL_TOPOLOGY(tt)
#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 , DRIVER_GENERIC_TUNTAP , DRIVER_AFUNIX ,   DRIVER_NULL , DRIVER_DCO , DRIVER_UTUN }

Functions
static bool	tuntap_defined (const 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)
ssize_t	write_tun (const struct tuntap *tt, const uint8_t *buf, int len)
ssize_t	read_tun (const struct tuntap *tt, uint8_t *buf, int len)
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, const struct addrinfo *local_public, const 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 (const 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 (const struct tuntap *tt)
static int	route_order (const 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 (msglvl_t msglevel, msglvl_t warnlevel)
void	show_adapters (msglvl_t msglevel)
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 (const 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 (const 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, const struct buffer *buf)
static bool	tuntap_stop (int status)
static bool	tuntap_abort (int status)
int	tun_write_win32 (struct tuntap *tt, const struct buffer *buf)
static bool	is_ip_packet_valid (const struct buffer *buf)
static bool	tuntap_is_dco_win (const struct tuntap *tt)
static bool	tuntap_is_dco_win_timeout (const struct tuntap *tt, ssize_t 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 59 of file tun.h.

Referenced by tun_try_open_device().

DHCP_OPTIONS_DHCP_OPTIONAL

#define DHCP_OPTIONS_DHCP_OPTIONAL   (1 << 0)

Definition at line 69 of file tun.h.

Referenced by add_option(), and tuntap_options_postprocess_dns().

DHCP_OPTIONS_DHCP_REQUIRED

#define DHCP_OPTIONS_DHCP_REQUIRED   (1 << 1)

Definition at line 70 of file tun.h.

Referenced by add_option(), open_tun(), and options_postprocess_verify_ce().

IFCONFIG_AFTER_TUN_OPEN

#define IFCONFIG_AFTER_TUN_OPEN   1

Definition at line 349 of file tun.h.

Referenced by do_open_tun(), and ifconfig_order().

IFCONFIG_BEFORE_TUN_OPEN

#define IFCONFIG_BEFORE_TUN_OPEN   0

Definition at line 348 of file tun.h.

Referenced by do_open_tun(), and ifconfig_order().

IFCONFIG_DEFAULT

#define IFCONFIG_DEFAULT   IFCONFIG_AFTER_TUN_OPEN

Definition at line 351 of file tun.h.

Referenced by ifconfig_order().

IPW32_SET_ADAPTIVE

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

Definition at line 81 of file tun.h.

Referenced by add_option(), close_tun(), do_ifconfig_ipv4(), init_options(), options_postprocess_mutate_invariant(), options_postprocess_verify_ce(), run_dns_up_down(), tun_standby(), tuntap_options_postprocess_dns(), and tuntap_set_ip_props().

IPW32_SET_ADAPTIVE_DELAY_WINDOW

#define IPW32_SET_ADAPTIVE_DELAY_WINDOW   300

Definition at line 65 of file tun.h.

Referenced by add_option().

IPW32_SET_ADAPTIVE_TRY_NETSH

#define IPW32_SET_ADAPTIVE_TRY_NETSH   20

Definition at line 66 of file tun.h.

Referenced by tun_standby().

IPW32_SET_DHCP_MASQ

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

Definition at line 80 of file tun.h.

Referenced by add_option(), close_tun(), dhcp_release(), dhcp_renew(), do_ifconfig_ipv4(), init_options(), options_postprocess_mutate_invariant(), options_postprocess_verify_ce(), run_dns_up_down(), tuntap_options_postprocess_dns(), and tuntap_set_ip_props().

IPW32_SET_IPAPI

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

Definition at line 79 of file tun.h.

Referenced by tuntap_set_ip_addr().

IPW32_SET_MANUAL

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

Definition at line 77 of file tun.h.

Referenced by close_tun(), do_ifconfig_ipv4(), do_ifconfig_ipv6(), and options_postprocess_mutate_invariant().

IPW32_SET_N

#define IPW32_SET_N   5

Definition at line 82 of file tun.h.

Referenced by ascii2ipset(), ipset2ascii(), and ipset2ascii_all().

IPW32_SET_NETSH

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

Definition at line 78 of file tun.h.

Referenced by close_tun(), do_ifconfig_ipv4(), and options_postprocess_mutate_invariant().

N_DHCP_ADDR

#define N_DHCP_ADDR   4u

Definition at line 108 of file tun.h.

Referenced by dhcp_option_address_parse(), dhcp_option_dns6_parse(), and tuntap_options_postprocess_dns().

N_SEARCH_LIST_LEN

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

Definition at line 126 of file tun.h.

Referenced by add_option(), do_dns_domain_service(), and tuntap_options_postprocess_dns().

ROUTE_AFTER_TUN

#define ROUTE_AFTER_TUN   1

Definition at line 380 of file tun.h.

Referenced by do_open_tun(), do_up(), and do_update().

ROUTE_BEFORE_TUN

#define ROUTE_BEFORE_TUN   0

Definition at line 379 of file tun.h.

Referenced by do_open_tun(), and route_order().

ROUTE_ORDER_DEFAULT

#define ROUTE_ORDER_DEFAULT   ROUTE_AFTER_TUN

Definition at line 381 of file tun.h.

Referenced by route_order().

TUNNEL_TOPOLOGY

#define TUNNEL_TOPOLOGY

(

tt

)

Value:

((tt) ? ((tt)->topology) : TOP_UNDEF)

Definition at line 185 of file tun.h.

Referenced by multi_select_virtual_addr(), and multi_set_virtual_addr_env().

TUNNEL_TYPE

#define TUNNEL_TYPE

(

tt

)

Value:

((tt) ? ((tt)->type) : DEV_TYPE_UNDEF)

Definition at line 182 of file tun.h.

Referenced by drop_if_recursive_routing(), ipv6_send_icmp_unreachable(), multi_add_iroutes(), multi_client_connect_late_setup(), multi_del_iroutes(), multi_process_incoming_link_data(), multi_process_incoming_tun(), multi_select_virtual_addr(), multi_set_virtual_addr_env(), process_incoming_link_part2(), process_incoming_tun(), process_ip_header(), process_outgoing_tun(), and read_incoming_tun().

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
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 43 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 4384 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 6237 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 )

Definition at line 6136 of file tun.c.

References tuntap::actual_name, ASSERT, clear_tuntap(), close_tun_handle(), delete_route_connected_v6_net(), dhcp_release(), tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, do_address_service(), do_dns_domain_pwsh(), do_dns_domain_service(), do_dns_service(), do_wins_service(), gc, gc_free(), gc_new(), tuntap_options::ip_win32_type, tuntap::ipapi_context, tuntap::ipapi_context_defined, IPW32_SET_ADAPTIVE, IPW32_SET_DHCP_MASQ, IPW32_SET_MANUAL, IPW32_SET_NETSH, M_WARN, msg, tuntap_options::msg_channel, netsh_delete_address_dns(), tuntap::options, status, and strerror_win32().

Referenced by do_close_tun_simple().

close_tun_handle()

void close_tun_handle

(

struct tuntap *

tt

)

Definition at line 6105 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(), tuntap::reads, and tuntap::writes.

Referenced by close_tun().

dev_type_enum()

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

Definition at line 518 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 537 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 4771 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 4812 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 1563 of file tun.c.

References D_LOW, tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, do_ifconfig_ipv4(), do_ifconfig_ipv6(), 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 783 of file tun.c.

References tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, 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

(

const struct tuntap *

tt

)

Definition at line 5377 of file tun.c.

References alloc_buf_gc(), BSTR, buf_printf(), fork_to_self(), gc, gc_free(), gc_new(), 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 4191 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 4210 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 4082 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 4107 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 4295 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 557 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 691 of file tun.c.

References alloc_buf_gc(), BSTR, buf_printf(), DEV_TYPE_TUN, tuntap::did_ifconfig_setup, gc, is_tun_p2p(), tuntap::local, print_in_addr_t(), tuntap::remote_netmask, and tuntap::type.

Referenced by options_string().

ifconfig_order()

int ifconfig_order ( const struct tuntap * tt )

inlinestatic

Definition at line 354 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,
		const struct addrinfo *	local_public,
		const struct addrinfo *	remote_public,
		const bool	strict_warn,
		struct env_set *	es,
		openvpn_net_ctx_t *	ctx,
		struct tuntap *	tt )

Definition at line 827 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(), 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 951 of file tun.c.

References tuntap::adapter_index, tuntap::backend_driver, tuntap::dco, DRIVER_DCO, tuntap::options, overlapped_io::overlapped, overlapped_io_init(), rw_handle::read, tuntap::reads, tuntap::rw_handle, TUN_ADAPTER_INDEX_INVALID, 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 4879 of file tun.c.

References argv_free(), argv_msg(), argv_new(), argv_printf(), D_TUNTAP_INFO, 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 6252 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 6266 of file tun.c.

References alloc_buf_gc(), ASSERT, BSTR, buf_printf(), gc, ipset2ascii(), IPW32_SET_N, 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 4308 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 500 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 4351 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()

bool is_ip_packet_valid ( const struct buffer * buf )

inlinestatic

Definition at line 505 of file tun.h.

References BLENZ, CBPTR, OPENVPN_IPH_GET_VER, and openvpn_iphdr::version_len.

is_tun_p2p()

bool is_tun_p2p

(

const struct tuntap *

tt

)

Definition at line 759 of file tun.c.

References DEV_TYPE_TAP, DEV_TYPE_TUN, M_FATAL, msg, TOP_SUBNET, tuntap::topology, and tuntap::type.

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

is_tun_type_set()

bool is_tun_type_set ( const struct tuntap * tt )

inlinestatic

Definition at line 631 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 5985 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()

void open_tun_null ( struct tuntap * tt )

inlinestatic

Definition at line 637 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, and WINDOWS_DRIVER_TAP_WINDOWS6.

Referenced by close_tun_handle(), do_close_tun_simple(), do_create_adapter_service(), 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()

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

References gc.

Referenced by read_incoming_tun().

route_order()

int route_order ( const struct tuntap * tt )

inlinestatic

Definition at line 384 of file tun.h.

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

Referenced by do_open_tun(), do_up(), and do_update().

show_adapters()

void show_adapters

(

msglvl_t

msglevel

)

Definition at line 4642 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	(	msglvl_t	msglevel,
		msglvl_t	warnlevel )

Definition at line 3808 of file tun.c.

References gc, gc_free(), gc_new(), get_panel_reg(), get_tap_reg(), panel_reg::guid, tap_reg::guid, msg, panel_reg::name, panel_reg::next, tap_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 3775 of file tun.c.

Referenced by add_option().

tap_allow_nonadmin_access()

void tap_allow_nonadmin_access

(

const char *

dev_node

)

Definition at line 4691 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 6026 of file tun.c.

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

Referenced by print_status(), and x_check_status().

tun_event_handle()

event_t tun_event_handle ( const struct tuntap * tt )

inlinestatic

Definition at line 591 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 1794 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 5803 of file tun.c.

References tuntap::actual_name, tuntap::adapter_index, tuntap::backend_driver, do_create_adapter_service(), 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, tuntap_options::msg_channel, device_instance_id_interface::next, tuntap::options, 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 3263 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()

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

inlinestatic

Definition at line 601 of file tun.h.

References tuntap::backend_driver, 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

(

const struct tuntap *

tt

)

Definition at line 6042 of file tun.c.

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

Referenced by pre_select().

tun_standby()

bool tun_standby

(

struct tuntap *

tt

)

Definition at line 5301 of file tun.c.

References tuntap::adapter_index, tuntap::adapter_netmask, tuntap_options::ip_win32_type, IPW32_SET_ADAPTIVE, IPW32_SET_ADAPTIVE_TRY_NETSH, tuntap::local, M_INFO, msg, netsh_ifconfig(), NI_IP_NETMASK, NI_OPTIONS, NI_TEST_FIRST, tuntap::options, and tuntap::standby_iter.

Referenced by check_add_routes().

tun_standby_init()

void tun_standby_init

(

struct tuntap *

tt

)

Definition at line 5295 of file tun.c.

References tuntap::standby_iter.

Referenced by do_up(), and do_update().

tun_stat()

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

Definition at line 728 of file tun.c.

References alloc_buf_gc(), BSTR, buf_printf(), EVENT_READ, EVENT_WRITE, gc, overlapped_io_state_ascii(), tuntap::reads, tuntap::rwflags_debug, and tuntap::writes.

Referenced by wait_status_string().

tun_write_queue()

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

Definition at line 3317 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,
		const struct buffer *	buf )

Definition at line 3371 of file tun.c.

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

Referenced by process_outgoing_tun().

tuntap_abort()

bool tuntap_abort ( int status )

inlinestatic

Definition at line 490 of file tun.h.

References status.

Referenced by read_incoming_tun().

tuntap_defined()

bool tuntap_defined ( const struct tuntap * tt )

inlinestatic

Definition at line 252 of file tun.h.

References tuntap::hand.

Referenced by dco_get_peer_stats(), dco_get_peer_stats_fallback(), dco_get_peer_stats_multi(), pre_select(), print_status(), process_incoming_link_part2(), tun_set(), and x_check_status().

tuntap_is_dco_win()

bool tuntap_is_dco_win ( const struct tuntap * tt )

inlinestatic

Definition at line 532 of file tun.h.

References tuntap::backend_driver, and DRIVER_DCO.

Referenced by do_close_link_socket(), do_close_tun(), do_up(), do_update(), multi_io_wait(), open_tun(), tun_set(), and tuntap_is_dco_win_timeout().

tuntap_is_dco_win_timeout()

bool tuntap_is_dco_win_timeout ( const struct tuntap * tt, ssize_t status )

inlinestatic

Definition at line 538 of file tun.h.

References openvpn_errno, status, and tuntap_is_dco_win().

Referenced by read_incoming_link().

tuntap_stop()

bool tuntap_stop ( int status )

inlinestatic

Definition at line 476 of file tun.h.

References status.

Referenced by read_incoming_tun().

undo_ifconfig()

void undo_ifconfig	(	const struct tuntap *	tt,
		openvpn_net_ctx_t *	ctx )

undo_ifconfig - undo configuration of the tunnel interface

Parameters

tt	the tuntap interface context
ctx	the networking API opaque context

Definition at line 1652 of file tun.c.

References tuntap::backend_driver, tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, DRIVER_AFUNIX, DRIVER_NULL, net_ctx_reset(), undo_ifconfig_ipv4(), and undo_ifconfig_ipv6().

Referenced by do_close_tun_simple().

verify_255_255_255_252()

void verify_255_255_255_252	(	in_addr_t	local,
		in_addr_t	remote )

Definition at line 3739 of file tun.c.

References gc, gc_free(), gc_new(), M_FATAL, msg, and print_in_addr_t().

Referenced by init_tun().

warn_on_use_of_common_subnets()

void warn_on_use_of_common_subnets

(

openvpn_net_ctx_t *

ctx

)

Definition at line 667 of file tun.c.

References route_gateway_address::addr, route_gateway_info::flags, route_gateway_info::gateway, gc, gc_free(), gc_new(), get_default_gateway(), M_WARN, msg, route_gateway_address::netmask, RGI_ADDR_DEFINED, and RGI_NETMASK_DEFINED.

Referenced by do_option_warnings().

write_tun()

ssize_t write_tun	(	const struct tuntap *	tt,
		const uint8_t *	buf,
		int	len )

Referenced by process_outgoing_tun().