#include "syshead.h"
#include "openvpn.h"
#include "tun.h"
#include "fdmisc.h"
#include "common.h"
#include "run_command.h"
#include "socket_util.h"
#include "manage.h"
#include "route.h"
#include "win32.h"
#include "wfp_block.h"
#include "networking.h"
#include "memdbg.h"
#include "openvpn-msg.h"
#include <string.h>

Include dependency graph for tun.c:

Data Structures
struct	ipset_names

Macros
#define	NI_TEST_FIRST (1 << 0)

#define	NI_IP_NETMASK (1 << 1)

#define	NI_OPTIONS (1 << 2)

#define	DHCP_STATUS_UNDEF 0

#define	DHCP_STATUS_ENABLED 1

#define	DHCP_STATUS_DISABLED 2

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

static void	netsh_ifconfig (const struct tuntap_options *to, DWORD adapter_index, const in_addr_t ip, const in_addr_t netmask, const unsigned int flags)

static void	windows_set_mtu (const int iface_index, const short family, const int mtu)

static void	netsh_set_dns6_servers (const struct in6_addr *addr_list, const int addr_len, DWORD adapter_index)
	Set the ipv6 dns servers on the specified interface.

static void	netsh_command (const struct argv *a, int n, msglvl_t msglevel)

static void	exec_command (const char prefix, const struct argv a, int n, msglvl_t msglevel)

static const char *	netsh_get_id (const char dev_node, struct gc_arena gc)

static bool	do_address_service (const bool add, const short family, const struct tuntap *tt)

static void	do_dns_domain_service (bool add, const struct tuntap *tt)

static void	do_dns_service (bool add, const short family, const struct tuntap *tt)

static void	do_wins_service (bool add, const struct tuntap *tt)

static bool	do_set_mtu_service (const struct tuntap *tt, const short family, const int mtu)

static void	do_dns_domain_pwsh (bool add, const struct tuntap *tt)

static bool	do_create_adapter_service (HANDLE msg_channel, enum tun_driver_type driver_type)
	Requests the interactive service to create a VPN adapter of the specified type.

static void	clear_tuntap (struct tuntap *tuntap)

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

static void	ifconfig_sanity_check (bool tun_p2p, in_addr_t addr)

static void	check_addr_clash (const char *name, int type, in_addr_t public, in_addr_t local, in_addr_t remote_netmask)

void	warn_on_use_of_common_subnets (openvpn_net_ctx_t *ctx)

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

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

bool	is_tun_p2p (const struct tuntap *tt)

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

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)

static void	add_route_connected_v6_net (struct tuntap tt, const struct env_set es)

void	delete_route_connected_v6_net (const struct tuntap *tt)

static void	do_ifconfig_ipv6 (struct tuntap tt, const char ifname, int tun_mtu, const struct env_set es, openvpn_net_ctx_t ctx)
	do_ifconfig_ipv6 - perform platform specific ifconfig6 commands

static void	do_ifconfig_ipv4 (struct tuntap tt, const char ifname, int tun_mtu, const struct env_set es, openvpn_net_ctx_t ctx)
	do_ifconfig_ipv4 - perform platform specific ifconfig commands

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

static void	undo_ifconfig_ipv4 (struct tuntap tt, openvpn_net_ctx_t ctx)

static void	undo_ifconfig_ipv6 (struct tuntap tt, openvpn_net_ctx_t ctx)

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

bool	tun_name_is_fixed (const char *dev)

int	tun_read_queue (struct tuntap *tt, int maxsize)

int	tun_write_queue (struct tuntap tt, struct buffer buf)

int	tun_write_win32 (struct tuntap tt, struct buffer buf)

static const struct device_instance_id_interface *	get_device_instance_id_interface (struct gc_arena *gc)

static const struct tap_reg *	get_tap_reg (struct gc_arena *gc)

static const struct panel_reg *	get_panel_reg (struct gc_arena *gc)

void	verify_255_255_255_252 (in_addr_t local, in_addr_t remote)

void	show_valid_win32_tun_subnets (void)

void	show_tap_win_adapters (msglvl_t msglevel, msglvl_t warnlevel)

static const struct tap_reg *	get_adapter_by_guid (const char guid, const struct tap_reg tap_reg)

static const char *	guid_to_name (const char guid, const struct panel_reg panel_reg)

static const struct tap_reg *	get_adapter_by_name (const char name, const struct tap_reg tap_reg, const struct panel_reg *panel_reg)

static void	at_least_one_tap_win (const struct tap_reg *tap_reg)

static const char *	get_unspecified_device_guid (const int device_number, uint8_t actual_name, int actual_name_size, const struct tap_reg tap_reg_src, const struct panel_reg panel_reg_src, enum tun_driver_type windows_driver, struct gc_arena *gc)

static const char *	get_device_guid (const char name, uint8_t actual_name, int actual_name_size, enum tun_driver_type windows_driver, const struct tap_reg tap_reg, const struct panel_reg panel_reg, struct gc_arena gc)

const IP_ADAPTER_INFO *	get_adapter_info_list (struct gc_arena *gc)

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

static const IP_INTERFACE_INFO *	get_interface_info_list (struct gc_arena *gc)

static const IP_ADAPTER_INDEX_MAP *	get_interface_info (DWORD index, struct gc_arena *gc)

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

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

static int	get_adapter_n_ip_netmask (const IP_ADAPTER_INFO *ai)

static bool	get_adapter_ip_netmask (const IP_ADAPTER_INFO ai, const int n, in_addr_t ip, in_addr_t *netmask)

static bool	test_adapter_ip_netmask (const IP_ADAPTER_INFO *ai, const in_addr_t ip, const in_addr_t netmask)

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, in_addr_t *netmask)

static int	dhcp_status (DWORD index)

static void	delete_temp_addresses (DWORD index)

static DWORD	get_adapter_index_method_1 (const char *guid)

static DWORD	get_adapter_index_method_2 (const char *guid)

static DWORD	get_adapter_index (const char *guid)

static const char *	format_ip_addr_string (const IP_ADDR_STRING ip, struct gc_arena gc)

static void	show_adapter (msglvl_t msglevel, const IP_ADAPTER_INFO a, struct gc_arena gc)

void	show_adapters (msglvl_t msglevel)

static void	tap_allow_nonadmin_access_handle (const char *device_path, HANDLE hand)

void	tap_allow_nonadmin_access (const char *dev_node)

bool	dhcp_release_by_adapter_index (const DWORD adapter_index)

static bool	dhcp_release (const struct tuntap *tt)

bool	dhcp_renew_by_adapter_index (const DWORD adapter_index)

static bool	dhcp_renew (const struct tuntap *tt)

void	ipconfig_register_dns (const struct env_set *es)

void	ip_addr_string_to_array (in_addr_t dest, int dest_len, const IP_ADDR_STRING *src)

static bool	ip_addr_one_to_one (const in_addr_t a1, const int a1len, const IP_ADDR_STRING ias)

static bool	ip_addr_member_of (const in_addr_t addr, const IP_ADDR_STRING *ias)

static void	netsh_ifconfig_options (const char type, const in_addr_t addr_list, const int addr_len, const IP_ADDR_STRING *current, DWORD adapter_index, const bool test_first)

static void	init_ip_addr_string2 (IP_ADDR_STRING dest, const IP_ADDR_STRING src1, const IP_ADDR_STRING *src2)

static void	netsh_enable_dhcp (DWORD adapter_index)

static bool	service_enable_dhcp (const struct tuntap *tt)

void	tun_standby_init (struct tuntap *tt)

bool	tun_standby (struct tuntap *tt)

static void	write_dhcp_u8 (struct buffer buf, const int type, const int data, bool error)

static void	write_dhcp_u32_array (struct buffer buf, const int type, const uint32_t data, const unsigned int len, bool *error)

static void	write_dhcp_str (struct buffer buf, const int type, const char str, bool *error)

static void	write_dhcp_search_str (struct buffer buf, const int type, const char const str_array, int array_len, bool error)

static bool	build_dhcp_options_string (struct buffer buf, const struct tuntap_options o)

static void	fork_dhcp_action (struct tuntap *tt)

static void	register_dns_service (const struct tuntap *tt)

void	fork_register_dns_action (struct tuntap *tt)

static uint32_t	dhcp_masq_addr (const in_addr_t local, const in_addr_t netmask, const int offset)

static void	tuntap_get_version_info (const struct tuntap *tt)

static void	tuntap_get_mtu (struct tuntap *tt)

static void	tuntap_set_ip_addr (struct tuntap tt, const char device_guid, bool dhcp_masq_post)

static void	tuntap_set_connected (const struct tuntap *tt)

static void	tuntap_set_ptp (const struct tuntap *tt)

static void	tuntap_dhcp_mask (const struct tuntap tt, const char device_guid)

static bool	tun_try_open_device (struct tuntap tt, const char device_guid, const struct device_instance_id_interface *device_instance_id_interface)

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

static void	tuntap_set_ip_props (const struct tuntap tt, bool dhcp_masq, bool *dhcp_masq_post)

static void	tuntap_post_open (struct tuntap tt, const char device_guid)

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

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

void	tun_show_debug (struct tuntap *tt)

static void	netsh_delete_address_dns (const struct tuntap tt, bool ipv6, struct gc_arena gc)

void	close_tun_handle (struct tuntap *tt)

void	close_tun (struct tuntap tt, openvpn_net_ctx_t ctx)

int	ascii2ipset (const char *name)

const char *	ipset2ascii (int index)

const char *	ipset2ascii_all (struct gc_arena *gc)

Variables
static const GUID	GUID_DEVCLASS_NET

static const GUID	GUID_DEVINTERFACE_NET

static const char	ifconfig_warn_how_to_silence [] = "(silence this warning with --ifconfig-nowarn)"

static const struct ipset_names	ipset_names []

Macro Definition Documentation

◆ DHCP_STATUS_DISABLED

#define DHCP_STATUS_DISABLED 2

Definition at line 4695 of file tun.c.

◆ DHCP_STATUS_ENABLED

#define DHCP_STATUS_ENABLED 1

Definition at line 4694 of file tun.c.

◆ DHCP_STATUS_UNDEF

#define DHCP_STATUS_UNDEF 0

Definition at line 4693 of file tun.c.

◆ NI_IP_NETMASK

#define NI_IP_NETMASK (1 << 1)

Definition at line 97 of file tun.c.

◆ NI_OPTIONS

#define NI_OPTIONS (1 << 2)

Definition at line 98 of file tun.c.

◆ NI_TEST_FIRST

#define NI_TEST_FIRST (1 << 0)

Definition at line 96 of file tun.c.

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 4620 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().

◆ add_route_connected_v6_net()

static void add_route_connected_v6_net	(	struct tuntap *	tt,
		const struct env_set *	es
	)

static

Definition at line 980 of file tun.c.

References add_route_ipv6(), CLEAR, es, tuntap::local_ipv6, tuntap::netbits_ipv6, r6, RT_DEFINED, and RT_METRIC_DEFINED.

Referenced by do_ifconfig_ipv6().

◆ ascii2ipset()

int ascii2ipset ( const char * name )

Definition at line 6672 of file tun.c.

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

Referenced by add_option().

◆ at_least_one_tap_win()

static void at_least_one_tap_win ( const struct tap_reg * tap_reg )

static

Definition at line 4175 of file tun.c.

References M_FATAL, and msg.

Referenced by netsh_get_id(), and tap_allow_nonadmin_access().

◆ build_dhcp_options_string()

static bool build_dhcp_options_string	(	struct buffer *	buf,
		const struct tuntap_options *	o
	)

static

Definition at line 5706 of file tun.c.

References buf_safe(), buf_write_u32(), buf_write_u8(), buffer::len, M_WARN, msg, write_dhcp_search_str(), write_dhcp_str(), write_dhcp_u32_array(), and write_dhcp_u8().

Referenced by tuntap_dhcp_mask().

◆ check_addr_clash()

static void check_addr_clash	(	const char *	name,
		int	type,
		in_addr_t	public,
		in_addr_t	local,
		in_addr_t	remote_netmask
	)

static

Definition at line 615 of file tun.c.

References DEV_TYPE_TAP, DEV_TYPE_TUN, gc, gc_free(), gc_new(), ifconfig_warn_how_to_silence, M_INFO, M_WARN, msg, and print_in_addr_t().

Referenced by init_tun().

◆ clear_tuntap()

static void clear_tuntap ( struct tuntap * tuntap )

static

Definition at line 1674 of file tun.c.

References CLEAR, and tuntap::hand.

Referenced by close_tun(), and init_tun().

◆ 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 6541 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().

◆ delete_route_connected_v6_net()

void delete_route_connected_v6_net ( const struct tuntap * tt )

Definition at line 994 of file tun.c.

References CLEAR, delete_route_ipv6(), tuntap::local_ipv6, tuntap::netbits_ipv6, r6, route_ipv6_clear_host_bits(), RT_ADDED, RT_DEFINED, and RT_METRIC_DEFINED.

Referenced by close_tun(), and netsh_delete_address_dns().

◆ delete_temp_addresses()

static void delete_temp_addresses ( DWORD index )

static

Definition at line 4727 of file tun.c.

References gc, gc_free(), gc_new(), get_adapter_info(), M_INFO, msg, and status.

Referenced by tuntap_set_ip_addr().

◆ dev_type_enum()

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

Definition at line 520 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 539 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_masq_addr()

static uint32_t dhcp_masq_addr	(	const in_addr_t	local,
		const in_addr_t	netmask,
		const int	offset
	)

static

Definition at line 5828 of file tun.c.

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

Referenced by tuntap_dhcp_mask().

◆ dhcp_release()

static bool dhcp_release ( const struct tuntap * tt )

static

Definition at line 5034 of file tun.c.

References tuntap::adapter_index, dhcp_release_by_adapter_index(), tuntap_options::ip_win32_type, IPW32_SET_DHCP_MASQ, tuntap::options, and TUN_ADAPTER_INDEX_INVALID.

Referenced by close_tun(), and tuntap_set_ip_addr().

◆ dhcp_release_by_adapter_index()

bool dhcp_release_by_adapter_index ( const DWORD adapter_index )

Definition at line 5007 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()

static bool dhcp_renew ( const struct tuntap * tt )

static

Definition at line 5074 of file tun.c.

References tuntap::adapter_index, dhcp_renew_by_adapter_index(), tuntap_options::ip_win32_type, IPW32_SET_DHCP_MASQ, tuntap::options, and TUN_ADAPTER_INDEX_INVALID.

Referenced by show_tuntap_options(), and tuntap_set_ip_addr().

◆ dhcp_renew_by_adapter_index()

bool dhcp_renew_by_adapter_index ( const DWORD adapter_index )

Definition at line 5048 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().

◆ dhcp_status()

static int dhcp_status ( DWORD index )

static

Definition at line 4698 of file tun.c.

References DHCP_STATUS_DISABLED, DHCP_STATUS_ENABLED, DHCP_STATUS_UNDEF, gc, gc_free(), gc_new(), get_adapter_info(), and TUN_ADAPTER_INDEX_INVALID.

Referenced by tuntap_set_ip_addr(), and tuntap_set_ip_props().

◆ do_address_service()

static bool do_address_service	(	const bool	add,
		const short	family,
		const struct tuntap *	tt
	)

static

◆ do_create_adapter_service()

static bool do_create_adapter_service	(	HANDLE	msg_channel,
		enum tun_driver_type	driver_type
	)

static

Requests the interactive service to create a VPN adapter of the specified type.

Parameters

msg_channel	Handle to the interactive service communication pipe.
driver_type	Adapter type to create (e.g., TAP, Wintun, DCO).

Returns: true on success, false on failure.

Definition at line 436 of file tun.c.

References ADAPTER_TYPE_DCO, ADAPTER_TYPE_TAP, DRIVER_DCO, ack_message_t::error_number, gc, gc_free(), gc_new(), create_adapter_message_t::header, M_INFO, M_NONFATAL, msg, msg_create_adapter, print_tun_backend_driver(), send_msg_iservice(), strerror_win32(), and WINDOWS_DRIVER_TAP_WINDOWS6.

Referenced by tun_open_device().

◆ do_dns_domain_pwsh()

static void do_dns_domain_pwsh	(	bool	add,
		const struct tuntap *	tt
	)

static

Definition at line 408 of file tun.c.

References tuntap::adapter_index, argv_free(), argv_new(), argv_printf(), tuntap_options::domain, exec_command(), get_win_sys_path(), M_WARN, tuntap::options, and POWERSHELL_PATH_SUFFIX.

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

◆ do_dns_domain_service()

static void do_dns_domain_service	(	bool	add,
		const struct tuntap *	tt
	)

static

Definition at line 169 of file tun.c.

References tuntap::actual_name, tuntap::adapter_index, D_LOW, tuntap_options::dns, tuntap_options::domain, tuntap_options::domain_search_list, ack_message_t::error_number, gc, gc_free(), gc_new(), dns_cfg_message_t::header, i, M_INFO, M_WARN, msg, msg_add_dns_cfg, tuntap_options::msg_channel, msg_del_dns_cfg, N_SEARCH_LIST_LEN, tuntap::options, send_msg_iservice(), strerror_win32(), and strncpynt().

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

◆ do_dns_service()

static void do_dns_service	(	bool	add,
		const short	family,
		const struct tuntap *	tt
	)

static

◆ 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 1565 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_ipv4()

static void do_ifconfig_ipv4	(	struct tuntap *	tt,
		const char *	ifname,
		int	tun_mtu,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx
	)

static

do_ifconfig_ipv4 - perform platform specific ifconfig commands

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 1238 of file tun.c.

References tuntap::adapter_index, tuntap::adapter_netmask, add_route(), argv_free(), argv_msg(), argv_new(), argv_printf(), CLEAR, DEV_TYPE_TUN, do_address_service(), do_dns_domain_pwsh(), do_dns_domain_service(), do_dns_service(), do_set_mtu_service(), do_wins_service(), env_set_add(), env_set_create(), env_set_destroy(), es, route_ipv4::flags, route_ipv4::gateway, gc, gc_free(), gc_new(), IFCONFIG_PATH, tuntap_options::ip_win32_type, IPW32_SET_ADAPTIVE, IPW32_SET_DHCP_MASQ, IPW32_SET_MANUAL, IPW32_SET_NETSH, is_tun_p2p(), tuntap::local, M_FATAL, M_INFO, route_ipv4::metric, msg, tuntap_options::msg_channel, route_ipv4::netmask, netmask_to_netbits2(), netsh_ifconfig(), route_ipv4::network, NI_IP_NETMASK, NI_OPTIONS, openvpn_execve_check(), tuntap::options, print_in_addr_t(), print_topology(), tuntap::remote_netmask, RT_DEFINED, RT_METRIC_DEFINED, S_FATAL, tuntap::topology, tuntap::type, and windows_set_mtu().

Referenced by do_ifconfig().

◆ do_ifconfig_ipv6()

static void do_ifconfig_ipv6	(	struct tuntap *	tt,
		const char *	ifname,
		int	tun_mtu,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx
	)

static

do_ifconfig_ipv6 - perform platform specific ifconfig6 commands

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 1047 of file tun.c.

References tuntap::adapter_index, add_route_connected_v6_net(), argv_free(), argv_msg(), argv_new(), argv_printf(), DEV_TYPE_TUN, tuntap::did_ifconfig_setup, tuntap_options::dns6, tuntap_options::dns6_len, do_address_service(), do_dns_domain_pwsh(), do_dns_domain_service(), do_dns_service(), do_set_mtu_service(), env_set_add(), env_set_create(), env_set_destroy(), es, gc, gc_free(), gc_new(), get_win_sys_path(), IFCONFIG_PATH, tuntap_options::ip_win32_type, IPW32_SET_MANUAL, tuntap::local_ipv6, M_FATAL, M_INFO, msg, tuntap_options::msg_channel, tuntap::netbits_ipv6, netsh_command(), NETSH_PATH_SUFFIX, netsh_set_dns6_servers(), openvpn_execve_check(), tuntap::options, print_in6_addr(), tuntap::remote_ipv6, S_FATAL, sleep, tuntap::type, and windows_set_mtu().

Referenced by do_ifconfig().

◆ do_ifconfig_setenv()

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

Definition at line 785 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().

◆ do_set_mtu_service()

static bool do_set_mtu_service	(	const struct tuntap *	tt,
		const short	family,
		const int	mtu
	)

static

Definition at line 366 of file tun.c.

References tuntap::actual_name, tuntap::adapter_index, ack_message_t::error_number, gc, gc_free(), gc_new(), set_mtu_message_t::header, set_mtu_message_t::iface, interface_t::index, M_INFO, M_NONFATAL, msg, tuntap_options::msg_channel, msg_set_mtu, interface_t::name, tuntap::options, send_msg_iservice(), strerror_win32(), and strncpynt().

Referenced by do_ifconfig_ipv4(), and do_ifconfig_ipv6().

◆ do_wins_service()

static void do_wins_service	(	bool	add,
		const struct tuntap *	tt
	)

static

Definition at line 309 of file tun.c.

References tuntap::actual_name, tuntap::adapter_index, wins_cfg_message_t::addr, wins_cfg_message_t::addr_len, D_LOW, ack_message_t::error_number, gc, gc_free(), gc_new(), wins_cfg_message_t::header, i, wins_cfg_message_t::iface, interface_t::index, inet_address_t::ipv4, M_INFO, M_WARN, msg, msg_add_wins_cfg, tuntap_options::msg_channel, msg_del_wins_cfg, interface_t::name, tuntap::options, send_msg_iservice(), strerror_win32(), tuntap_options::wins, and tuntap_options::wins_len.

Referenced by close_tun(), and do_ifconfig_ipv4().

◆ exec_command()

static void exec_command	(	const char *	prefix,
		const struct argv *	a,
		int	n,
		msglvl_t	msglevel
	)

static

Definition at line 5088 of file tun.c.

References argv_msg_prefix(), i, M_INFO, management_sleep(), msg, netcmd_semaphore_lock(), netcmd_semaphore_release(), openvpn_execve_check(), and status.

Referenced by do_dns_domain_pwsh(), and netsh_command().

◆ fork_dhcp_action()

static void fork_dhcp_action ( struct tuntap * tt )

static

Definition at line 5754 of file tun.c.

References alloc_buf_gc(), BSTR, buf_printf(), fork_to_self(), gc, gc_free(), gc_new(), and buffer::len.

Referenced by tuntap_set_ip_addr().

◆ fork_register_dns_action()

void fork_register_dns_action ( struct tuntap * tt )

Definition at line 5809 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().

◆ format_ip_addr_string()

static const char * format_ip_addr_string	(	const IP_ADDR_STRING *	ip,
		struct gc_arena *	gc
	)

static

Definition at line 4824 of file tun.c.

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

Referenced by show_adapter().

◆ get_adapter()

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

Definition at line 4425 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_by_guid()

static const struct tap_reg * get_adapter_by_guid	(	const char *	guid,
		const struct tap_reg *	tap_reg
	)

static

Definition at line 4126 of file tun.c.

References tap_reg::guid, and tap_reg::next.

Referenced by get_adapter_by_name(), and get_device_guid().

◆ get_adapter_by_name()

static const struct tap_reg * get_adapter_by_name	(	const char *	name,
		const struct tap_reg *	tap_reg,
		const struct panel_reg *	panel_reg
	)

static

Definition at line 4158 of file tun.c.

References get_adapter_by_guid(), panel_reg::guid, panel_reg::name, and panel_reg::next.

Referenced by get_device_guid().

◆ get_adapter_index()

static DWORD get_adapter_index ( const char * guid )

static

Definition at line 4805 of file tun.c.

References get_adapter_index_method_1(), get_adapter_index_method_2(), M_INFO, msg, and TUN_ADAPTER_INDEX_INVALID.

Referenced by tun_open_device().

◆ get_adapter_index_method_1()

static DWORD get_adapter_index_method_1 ( const char * guid )

static

Definition at line 4765 of file tun.c.

References SIZE, and TUN_ADAPTER_INDEX_INVALID.

Referenced by get_adapter_index().

◆ get_adapter_index_method_2()

static DWORD get_adapter_index_method_2 ( const char * guid )

static

Definition at line 4783 of file tun.c.

References gc, gc_free(), gc_new(), get_adapter_info_list(), gc_arena::list, and TUN_ADAPTER_INDEX_INVALID.

Referenced by get_adapter_index().

◆ get_adapter_info()

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

Definition at line 4444 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 4317 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_adapter_ip_netmask()

static bool get_adapter_ip_netmask	(	const IP_ADAPTER_INFO *	ai,
		const int	n,
		in_addr_t *	ip,
		in_addr_t *	netmask
	)

static

Definition at line 4471 of file tun.c.

References getaddr(), GETADDR_HOST_ORDER, and i.

Referenced by is_adapter_up(), is_ip_in_adapter_subnet(), and test_adapter_ip_netmask().

◆ get_adapter_n_ip_netmask()

static int get_adapter_n_ip_netmask ( const IP_ADAPTER_INFO * ai )

static

Definition at line 4450 of file tun.c.

Referenced by is_adapter_up(), and is_ip_in_adapter_subnet().

◆ get_device_guid()

static const char * get_device_guid	(	const char *	name,
		uint8_t *	actual_name,
		int	actual_name_size,
		enum tun_driver_type *	windows_driver,
		const struct tap_reg *	tap_reg,
		const struct panel_reg *	panel_reg,
		struct gc_arena *	gc
	)

static

Definition at line 4253 of file tun.c.

References alloc_buf_gc(), ASSERT, BSTR, buf_printf(), buf_set_write(), clear_buf(), gc, get_adapter_by_guid(), get_adapter_by_name(), tap_reg::guid, guid_to_name(), and tap_reg::windows_driver.

Referenced by netsh_get_id(), tap_allow_nonadmin_access(), and tun_open_device().

◆ get_device_instance_id_interface()

static const struct device_instance_id_interface * get_device_instance_id_interface ( struct gc_arena * gc )

static

Definition at line 3640 of file tun.c.

References ALLOC_OBJ_CLEAR_GC, D_TAP_WIN_DEBUG, device_instance_id_interface::device_interface, gc, gc_malloc(), GUID_DEVCLASS_NET, GUID_DEVINTERFACE_NET, i, M_FATAL, msg, device_instance_id_interface::net_cfg_instance_id, device_instance_id_interface::next, res, status, strerror_win32(), and string_alloc().

Referenced by tun_open_device().

◆ get_interface_info()

static const IP_ADAPTER_INDEX_MAP * get_interface_info	(	DWORD	index,
		struct gc_arena *	gc
	)

static

Definition at line 4401 of file tun.c.

References gc, get_interface_info_list(), and i.

Referenced by dhcp_release_by_adapter_index(), and dhcp_renew_by_adapter_index().

◆ get_interface_info_list()

static const IP_INTERFACE_INFO * get_interface_info_list ( struct gc_arena * gc )

static

Definition at line 4373 of file tun.c.

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

Referenced by get_interface_info().

◆ get_panel_reg()

static const struct panel_reg * get_panel_reg ( struct gc_arena * gc )

static

Definition at line 3877 of file tun.c.

References ALLOC_OBJ_CLEAR_GC, D_REGISTRY, dmsg, gc, gc_malloc(), panel_reg::guid, i, M_FATAL, msg, panel_reg::name, panel_reg::next, status, and string_alloc().

Referenced by netsh_get_id(), show_tap_win_adapters(), tap_allow_nonadmin_access(), and tun_open_device().

◆ get_per_adapter_info()

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

Definition at line 4342 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_tap_reg()

static const struct tap_reg * get_tap_reg ( struct gc_arena * gc )

static

Definition at line 3766 of file tun.c.

References ALLOC_OBJ_CLEAR_GC, D_REGISTRY, D_TAP_WIN_DEBUG, dmsg, DRIVER_DCO, gc, tap_reg::guid, i, M_FATAL, msg, tap_reg::next, print_tun_backend_driver(), status, string_alloc(), TAP_WIN_COMPONENT_ID, tap_reg::windows_driver, WINDOWS_DRIVER_TAP_WINDOWS6, and WINDOWS_DRIVER_UNSPECIFIED.

Referenced by netsh_get_id(), show_tap_win_adapters(), tap_allow_nonadmin_access(), and tun_open_device().

◆ get_tun_adapter()

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

Definition at line 4529 of file tun.c.

References tuntap::adapter_index, and get_adapter().

Referenced by is_adapter_up(), and windows_route_find_if_index().

◆ get_unspecified_device_guid()

static const char * get_unspecified_device_guid	(	const int	device_number,
		uint8_t *	actual_name,
		int	actual_name_size,
		const struct tap_reg *	tap_reg_src,
		const struct panel_reg *	panel_reg_src,
		enum tun_driver_type *	windows_driver,
		struct gc_arena *	gc
	)

static

Definition at line 4190 of file tun.c.

References alloc_buf_gc(), ASSERT, BSTR, buf_printf(), buf_set_write(), clear_buf(), gc, tap_reg::guid, guid_to_name(), i, buffer::len, tap_reg::next, and tap_reg::windows_driver.

Referenced by netsh_get_id(), tap_allow_nonadmin_access(), and tun_open_device().

◆ 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 559 of file tun.c.

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

Referenced by do_open_tun().

◆ guid_to_name()

static const char * guid_to_name	(	const char *	guid,
		const struct panel_reg *	panel_reg
	)

static

Definition at line 4142 of file tun.c.

References panel_reg::guid, panel_reg::name, and panel_reg::next.

Referenced by get_device_guid(), and get_unspecified_device_guid().

◆ ifconfig_options_string()

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

Definition at line 693 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_sanity_check()

static void ifconfig_sanity_check	(	bool	tun_p2p,
		in_addr_t	addr
	)

static

Definition at line 585 of file tun.c.

References gc, gc_free(), gc_new(), ifconfig_warn_how_to_silence, M_WARN, msg, and print_in_addr_t().

Referenced by init_tun().

◆ init_ip_addr_string2()

static void init_ip_addr_string2	(	IP_ADDR_STRING *	dest,
		const IP_ADDR_STRING *	src1,
		const IP_ADDR_STRING *	src2
	)

static

Definition at line 5323 of file tun.c.

References CLEAR.

Referenced by netsh_ifconfig().

◆ 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 829 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 953 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().

◆ ip_addr_member_of()

static bool ip_addr_member_of	(	const in_addr_t	addr,
		const IP_ADDR_STRING *	ias
	)

static

Definition at line 5205 of file tun.c.

References i, ip_addr_string_to_array(), and SIZE.

Referenced by netsh_ifconfig_options().

◆ ip_addr_one_to_one()

static bool ip_addr_one_to_one	(	const in_addr_t *	a1,
		const int	a1len,
		const IP_ADDR_STRING *	ias
	)

static

Definition at line 5181 of file tun.c.

References i, ip_addr_string_to_array(), and SIZE.

Referenced by netsh_ifconfig_options().

◆ ip_addr_string_to_array()

void ip_addr_string_to_array	(	in_addr_t *	dest,
		int *	dest_len,
		const IP_ADDR_STRING *	src
	)

Definition at line 5137 of file tun.c.

References gc, gc_free(), gc_new(), getaddr(), GETADDR_HOST_ORDER, i, M_INFO, msg, and print_in_addr_t().

Referenced by ip_addr_member_of(), and ip_addr_one_to_one().

◆ ipconfig_register_dns()

void ipconfig_register_dns ( const struct env_set * es )

Definition at line 5115 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 6687 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 6701 of file tun.c.

References alloc_buf_gc(), ASSERT, BSTR, buf_printf(), gc, i, 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 4542 of file tun.c.

References tuntap::adapter_netmask, get_adapter_ip_netmask(), get_adapter_n_ip_netmask(), get_tun_adapter(), i, 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 502 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 4586 of file tun.c.

References get_adapter_ip_netmask(), get_adapter_n_ip_netmask(), and i.

Referenced by adapter_index_of_ip(), and windows_route_find_if_index().

◆ is_tun_p2p()

bool is_tun_p2p ( const struct tuntap * tt )

Definition at line 761 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().

◆ netsh_command()

static void netsh_command	(	const struct argv *	a,
		int	n,
		msglvl_t	msglevel
	)

static

Definition at line 5109 of file tun.c.

References exec_command().

Referenced by do_ifconfig_ipv6(), netsh_delete_address_dns(), netsh_enable_dhcp(), netsh_ifconfig(), netsh_ifconfig_options(), and netsh_set_dns6_servers().

◆ netsh_delete_address_dns()

static void netsh_delete_address_dns	(	const struct tuntap *	tt,
		bool	ipv6,
		struct gc_arena *	gc
	)

static

Definition at line 6494 of file tun.c.

References tuntap::adapter_index, argv_free(), argv_new(), argv_printf(), delete_route_connected_v6_net(), DEV_TYPE_TUN, tuntap_options::dns6_len, tuntap_options::dns_len, gc, get_win_sys_path(), buffer::len, tuntap::local, tuntap::local_ipv6, M_WARN, netsh_command(), NETSH_PATH_SUFFIX, tuntap::options, print_in6_addr(), print_in_addr_t(), tuntap::type, and tuntap_options::wins_len.

Referenced by close_tun().

◆ netsh_enable_dhcp()

static void netsh_enable_dhcp ( DWORD adapter_index )

static

Definition at line 5397 of file tun.c.

References argv_free(), argv_new(), argv_printf(), get_win_sys_path(), M_FATAL, netsh_command(), and NETSH_PATH_SUFFIX.

Referenced by tuntap_set_ip_props().

◆ netsh_get_id()

static const char * netsh_get_id	(	const char *	dev_node,
		struct gc_arena *	gc
	)

static

Definition at line 5487 of file tun.c.

References alloc_buf_gc(), at_least_one_tap_win(), BCAP, BPTR, BSTR, gc, get_device_guid(), get_panel_reg(), get_tap_reg(), get_unspecified_device_guid(), and buffer::len.

Referenced by guess_tuntap_dev().

◆ netsh_ifconfig()

static void netsh_ifconfig	(	const struct tuntap_options *	to,
		DWORD	adapter_index,
		const in_addr_t	ip,
		const in_addr_t	netmask,
		const unsigned int	flags
	)

static

Definition at line 5341 of file tun.c.

References argv_free(), argv_new(), argv_printf(), BOOL_CAST, CLEAR, tuntap_options::dns, tuntap_options::dns_len, gc, gc_free(), gc_new(), get_adapter(), get_adapter_info_list(), get_per_adapter_info(), get_win_sys_path(), init_ip_addr_string2(), M_FATAL, M_INFO, msg, netsh_command(), netsh_ifconfig_options(), NETSH_PATH_SUFFIX, NI_IP_NETMASK, NI_OPTIONS, NI_TEST_FIRST, print_in_addr_t(), test_adapter_ip_netmask(), tuntap_options::wins, and tuntap_options::wins_len.

Referenced by do_ifconfig_ipv4(), tun_standby(), and tuntap_set_ip_props().

◆ netsh_ifconfig_options()

static void netsh_ifconfig_options	(	const char *	type,
		const in_addr_t *	addr_list,
		const int	addr_len,
		const IP_ADDR_STRING *	current,
		DWORD	adapter_index,
		const bool	test_first
	)

static

Definition at line 5257 of file tun.c.

References argv_free(), argv_new(), argv_printf(), argv_printf_cat(), gc, gc_free(), gc_new(), get_win_sys_path(), i, ip_addr_member_of(), ip_addr_one_to_one(), M_FATAL, M_INFO, msg, netsh_command(), NETSH_PATH_SUFFIX, and print_in_addr_t().

Referenced by netsh_ifconfig().

◆ netsh_set_dns6_servers()

static void netsh_set_dns6_servers	(	const struct in6_addr *	addr_list,
		const int	addr_len,
		DWORD	adapter_index
	)

static

Set the ipv6 dns servers on the specified interface.

The list of dns servers currently set on the interface are cleared first.

Definition at line 5228 of file tun.c.

References argv_free(), argv_new(), argv_printf(), argv_printf_cat(), gc, gc_free(), gc_new(), get_win_sys_path(), i, M_FATAL, M_NONFATAL, netsh_command(), NETSH_PATH_SUFFIX, and print_in6_addr().

Referenced by do_ifconfig_ipv6().

◆ 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 6421 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().

◆ 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 58 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().

◆ register_dns_service()

static void register_dns_service ( const struct tuntap * tt )

static

Definition at line 5780 of file tun.c.

References ack_message_t::error_number, gc, gc_free(), gc_new(), buffer::len, M_INFO, M_WARN, msg, msg_register_dns, send_msg_iservice(), and strerror_win32().

Referenced by fork_register_dns_action().

◆ service_enable_dhcp()

static bool service_enable_dhcp ( const struct tuntap * tt )

static

Definition at line 5412 of file tun.c.

References tuntap::adapter_index, ack_message_t::error_number, gc, gc_free(), gc_new(), M_INFO, M_NONFATAL, msg, tuntap_options::msg_channel, msg_enable_dhcp, tuntap::options, send_msg_iservice(), and strerror_win32().

Referenced by tuntap_set_ip_props().

◆ show_adapter()

static void show_adapter	(	msglvl_t	msglevel,
		const IP_ADAPTER_INFO *	a,
		struct gc_arena *	gc
	)

static

Definition at line 4845 of file tun.c.

References format_hex_ex(), format_ip_addr_string(), gc, get_per_adapter_info(), buffer::len, msg, and time_string().

Referenced by show_adapters().

◆ show_adapters()

void show_adapters ( msglvl_t msglevel )

Definition at line 4878 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 4041 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 4008 of file tun.c.

References i.

Referenced by add_option().

◆ tap_allow_nonadmin_access()

void tap_allow_nonadmin_access ( const char * dev_node )

Definition at line 4927 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_allow_nonadmin_access_handle()

static void tap_allow_nonadmin_access_handle	(	const char *	device_path,
		HANDLE	hand
	)

static

Definition at line 4905 of file tun.c.

References init_security_attributes_allow_all(), M_ERR, M_ERRNO, M_INFO, M_NOPREFIX, msg, security_attributes::sa, and status.

Referenced by tap_allow_nonadmin_access().

◆ tap_win_getinfo()

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

Definition at line 6462 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().

◆ test_adapter_ip_netmask()

static bool test_adapter_ip_netmask	(	const IP_ADAPTER_INFO *	ai,
		const in_addr_t	ip,
		const in_addr_t	netmask
	)

static

Definition at line 4513 of file tun.c.

References get_adapter_ip_netmask(), and status.

Referenced by netsh_ifconfig().

◆ tun_name_is_fixed()

bool tun_name_is_fixed ( const char * dev )

Definition at line 1789 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
	)

◆ tun_read_queue()

int tun_read_queue	(	struct tuntap *	tt,
		int	maxsize
	)

Definition at line 3503 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_show_debug()

void tun_show_debug ( struct tuntap * tt )

Definition at line 6478 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 5537 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 5531 of file tun.c.

References buffer::len.

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 730 of file tun.c.

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

◆ tun_try_open_device()

static bool tun_try_open_device	(	struct tuntap *	tt,
		const char *	device_guid,
		const struct device_instance_id_interface *	device_instance_id_interface
	)

static

Definition at line 6182 of file tun.c.

References tuntap::backend_driver, D_TAP_WIN_DEBUG, D_TUNTAP_INFO, DCO_WIN_REFERENCE_STRING, device_instance_id_interface::device_interface, DRIVER_DCO, tuntap::hand, buffer::len, M_ERRNO, msg, device_instance_id_interface::net_cfg_instance_id, device_instance_id_interface::next, and print_tun_backend_driver().

Referenced by tun_open_device().

◆ tun_write_queue()

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

Definition at line 3559 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 3614 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 process_outgoing_tun().

◆ tuntap_dhcp_mask()

static void tuntap_dhcp_mask	(	const struct tuntap *	tt,
		const char *	device_guid
	)

static

Definition at line 6106 of file tun.c.

References tuntap::adapter_netmask, alloc_buf(), ASSERT, BLEN, BPTR, build_dhcp_options_string(), D_DHCP_OPT, DEV_TYPE_TAP, DEV_TYPE_TUN, tuntap_options::dhcp_lease_time, dhcp_masq_addr(), tuntap_options::dhcp_masq_custom_offset, tuntap_options::dhcp_masq_offset, tuntap_options::dhcp_options, format_hex(), free_buf(), gc, gc_free(), gc_new(), tuntap::hand, IA_NET_ORDER, buffer::len, tuntap::local, M_FATAL, M_INFO, M_WARN, msg, tuntap::options, print_in_addr_t(), tuntap::remote_netmask, TOP_SUBNET, tuntap::topology, and tuntap::type.

Referenced by tuntap_post_open().

◆ tuntap_get_mtu()

static void tuntap_get_mtu ( struct tuntap * tt )

static

Definition at line 5900 of file tun.c.

References D_MTU_INFO, tuntap::hand, and msg.

Referenced by tuntap_post_open().

◆ tuntap_get_version_info()

static void tuntap_get_version_info ( const struct tuntap * tt )

static

Definition at line 5859 of file tun.c.

References CLEAR, D_TUNTAP_INFO, DEV_TYPE_TUN, tuntap::hand, M_FATAL, M_INFO, msg, PACKAGE_NAME, TAP_WIN_MIN_MAJOR, TAP_WIN_MIN_MINOR, and tuntap::type.

Referenced by tuntap_post_open().

◆ tuntap_post_open()

static void tuntap_post_open	(	struct tuntap *	tt,
		const char *	device_guid
	)

static

Definition at line 6377 of file tun.c.

References tuntap::backend_driver, DEV_TYPE_TUN, tuntap::did_ifconfig_setup, tuntap_dhcp_mask(), tuntap_get_mtu(), tuntap_get_version_info(), tuntap_set_connected(), tuntap_set_ip_addr(), tuntap_set_ip_props(), tuntap_set_ptp(), tuntap::type, and WINDOWS_DRIVER_TAP_WINDOWS6.

Referenced by open_tun().

◆ tuntap_set_connected()

static void tuntap_set_connected ( const struct tuntap * tt )

static

Definition at line 6029 of file tun.c.

References tuntap::hand, M_INFO, M_WARN, management_sleep(), msg, tuntap::options, status, and tuntap_options::tap_sleep.

Referenced by tuntap_post_open().

◆ tuntap_set_ip_addr()

static void tuntap_set_ip_addr	(	struct tuntap *	tt,
		const char *	device_guid,
		bool	dhcp_masq_post
	)

static

◆ tuntap_set_ip_props()

static void tuntap_set_ip_props	(	const struct tuntap *	tt,
		bool *	dhcp_masq,
		bool *	dhcp_masq_post
	)

static

Definition at line 6337 of file tun.c.

References tuntap::adapter_index, tuntap::adapter_netmask, dhcp_status(), DHCP_STATUS_DISABLED, DHCP_STATUS_ENABLED, tuntap_options::ip_win32_type, IPW32_SET_ADAPTIVE, IPW32_SET_DHCP_MASQ, tuntap::local, tuntap_options::msg_channel, netsh_enable_dhcp(), netsh_ifconfig(), NI_IP_NETMASK, NI_OPTIONS, NI_TEST_FIRST, tuntap::options, and service_enable_dhcp().

Referenced by tuntap_post_open().

◆ tuntap_set_ptp()

static void tuntap_set_ptp ( const struct tuntap * tt )

static

Definition at line 6049 of file tun.c.

References tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, gc, gc_free(), gc_new(), tuntap::hand, IA_NET_ORDER, tuntap::local, M_FATAL, M_INFO, msg, print_in_addr_t(), tuntap::remote_netmask, status, TOP_SUBNET, and tuntap::topology.

Referenced by tuntap_post_open().

◆ undo_ifconfig()

void undo_ifconfig	(	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 1654 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().

◆ undo_ifconfig_ipv4()

static void undo_ifconfig_ipv4	(	struct tuntap *	tt,
		openvpn_net_ctx_t *	ctx
	)

static

Definition at line 1594 of file tun.c.

References tuntap::actual_name, argv_free(), argv_msg(), argv_new(), argv_printf(), gc, gc_free(), gc_new(), IFCONFIG_PATH, is_tun_p2p(), tuntap::local, M_INFO, M_WARN, msg, netmask_to_netbits2(), openvpn_execve_check(), print_in_addr_t(), and tuntap::remote_netmask.

Referenced by undo_ifconfig().

◆ undo_ifconfig_ipv6()

static void undo_ifconfig_ipv6	(	struct tuntap *	tt,
		openvpn_net_ctx_t *	ctx
	)

static

Definition at line 1629 of file tun.c.

References tuntap::actual_name, argv_free(), argv_msg(), argv_new(), argv_printf(), gc, gc_free(), gc_new(), IFCONFIG_PATH, tuntap::local_ipv6, M_INFO, M_WARN, msg, tuntap::netbits_ipv6, openvpn_execve_check(), and print_in6_addr().

Referenced by undo_ifconfig().

◆ verify_255_255_255_252()

void verify_255_255_255_252	(	in_addr_t	local,
		in_addr_t	remote
	)

Definition at line 3972 of file tun.c.

References gc, gc_free(), gc_new(), M_FATAL, msg, PACKAGE, 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 669 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().

◆ windows_set_mtu()

static void windows_set_mtu	(	const int	iface_index,
		const short	family,
		const int	mtu
	)

static

Definition at line 5444 of file tun.c.

References gc, gc_new(), M_INFO, M_WARN, msg, and strerror_win32().

Referenced by do_ifconfig_ipv4(), and do_ifconfig_ipv6().

◆ write_dhcp_search_str()

static void write_dhcp_search_str	(	struct buffer *	buf,
		const int	type,
		const char const	str_array,
		int	array_len,
		bool *	error
	)

static

Definition at line 5641 of file tun.c.

References buf_safe(), buf_write(), buf_write_u8(), i, buffer::len, M_WARN, and msg.

Referenced by build_dhcp_options_string().

◆ write_dhcp_str()

static void write_dhcp_str	(	struct buffer *	buf,
		const int	type,
		const char *	str,
		bool *	error
	)

static

Definition at line 5612 of file tun.c.

References buf_safe(), buf_write(), buf_write_u8(), buffer::len, M_WARN, and msg.

Referenced by build_dhcp_options_string().

◆ write_dhcp_u32_array()

static void write_dhcp_u32_array	(	struct buffer *	buf,
		const int	type,
		const uint32_t *	data,
		const unsigned int	len,
		bool *	error
	)

static

Definition at line 5582 of file tun.c.

References buf_safe(), buf_write_u32(), buf_write_u8(), buffer::data, i, buffer::len, M_WARN, and msg.

Referenced by build_dhcp_options_string().

◆ write_dhcp_u8()

static void write_dhcp_u8	(	struct buffer *	buf,
		const int	type,
		const int	data,
		bool *	error
	)

static

Definition at line 5568 of file tun.c.

References buf_safe(), buf_write_u8(), buffer::data, M_WARN, and msg.

Referenced by build_dhcp_options_string().

Variable Documentation

◆ GUID_DEVCLASS_NET

const GUID GUID_DEVCLASS_NET

static

Initial value:

= {
    0x4d36e972L, 0xe325, 0x11ce, { 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 }
}

Definition at line 87 of file tun.c.

Referenced by get_device_instance_id_interface().

◆ GUID_DEVINTERFACE_NET

const GUID GUID_DEVINTERFACE_NET

static

Initial value:

= {
    0xcac88484, 0x7515, 0x4c03, { 0x82, 0xe6, 0x71, 0xa8, 0x7a, 0xba, 0xc3, 0x61 }
}

Definition at line 90 of file tun.c.

Referenced by get_device_instance_id_interface().

◆ ifconfig_warn_how_to_silence

const char ifconfig_warn_how_to_silence[] = "(silence this warning with --ifconfig-nowarn)"

static

Definition at line 575 of file tun.c.

Referenced by check_addr_clash(), and ifconfig_sanity_check().

◆ ipset_names

const struct ipset_names ipset_names[]

static

Initial value:

= {
    { "manual" }, { "netsh" }, { "ipapi" }, { "dynamic" }, { "adaptive" }
}

Definition at line 6667 of file tun.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ DHCP_STATUS_DISABLED

◆ DHCP_STATUS_ENABLED

◆ DHCP_STATUS_UNDEF

◆ NI_IP_NETMASK

◆ NI_OPTIONS

◆ NI_TEST_FIRST

Function Documentation

◆ adapter_index_of_ip()

◆ add_route_connected_v6_net()

◆ ascii2ipset()

◆ at_least_one_tap_win()

◆ build_dhcp_options_string()

◆ check_addr_clash()

◆ clear_tuntap()

◆ close_tun()

◆ close_tun_handle()

◆ delete_route_connected_v6_net()

◆ delete_temp_addresses()

◆ dev_type_enum()

◆ dev_type_string()

◆ dhcp_masq_addr()

◆ dhcp_release()

◆ dhcp_release_by_adapter_index()

◆ dhcp_renew()

◆ dhcp_renew_by_adapter_index()

◆ dhcp_status()

◆ do_address_service()

◆ do_create_adapter_service()

◆ do_dns_domain_pwsh()

◆ do_dns_domain_service()

◆ do_dns_service()

◆ do_ifconfig()

◆ do_ifconfig_ipv4()

◆ do_ifconfig_ipv6()

◆ do_ifconfig_setenv()

◆ do_set_mtu_service()

◆ do_wins_service()

◆ exec_command()

◆ fork_dhcp_action()

◆ fork_register_dns_action()

◆ format_ip_addr_string()

◆ get_adapter()

◆ get_adapter_by_guid()

◆ get_adapter_by_name()

◆ get_adapter_index()

◆ get_adapter_index_method_1()

◆ get_adapter_index_method_2()

◆ get_adapter_info()

◆ get_adapter_info_list()

◆ get_adapter_ip_netmask()

◆ get_adapter_n_ip_netmask()

◆ get_device_guid()

◆ get_device_instance_id_interface()

◆ get_interface_info()

◆ get_interface_info_list()

◆ get_panel_reg()

◆ get_per_adapter_info()

◆ get_tap_reg()

◆ get_tun_adapter()

◆ get_unspecified_device_guid()

◆ guess_tuntap_dev()

◆ guid_to_name()

◆ ifconfig_options_string()

◆ ifconfig_sanity_check()

◆ init_ip_addr_string2()

◆ init_tun()

◆ init_tun_post()

◆ ip_addr_member_of()

◆ ip_addr_one_to_one()

◆ ip_addr_string_to_array()

◆ ipconfig_register_dns()

◆ ipset2ascii()

◆ ipset2ascii_all()

◆ is_adapter_up()

◆ is_dev_type()