dco_win.c File Reference

#include "syshead.h"
#include "dco.h"
#include "forward.h"
#include "tun.h"
#include "crypto.h"
#include "multi.h"
#include "ssl_common.h"
#include "openvpn.h"
#include <bcrypt.h>
#include <winsock2.h>
#include <ws2tcpip.h>

Include dependency graph for dco_win.c:

Go to the source code of this file.

Functions
static void	dco_wait_ready (DWORD idx)
static bool	dco_get_version (OVPN_VERSION *version)
	Gets version of dco-win driver.
void	ovpn_dco_init_mp (dco_context_t *dco, const char *dev_node)
	Initializes the DCO adapter in multipeer mode and sets it to "connected" state.
void	dco_p2p_start_vpn (struct tuntap *tt)
	Transitions the DCO adapter to the connected state in P2P mode.
bool	ovpn_dco_init (struct context *c)
	Initializes DCO depends on mode.
int	open_tun_dco (struct tuntap *tt, openvpn_net_ctx_t *ctx, const char *dev)
static void	dco_connect_wait (HANDLE handle, OVERLAPPED *ov, int timeout, struct signal_info *sig_info)
void	dco_mp_start_vpn (HANDLE handle, struct link_socket *sock)
	Initializes and binds the kernel UDP transport socket for multipeer mode.
void	dco_p2p_new_peer (HANDLE handle, OVERLAPPED *ov, struct link_socket *sock, struct signal_info *sig_info)
int	dco_new_peer (dco_context_t *dco, unsigned int peerid, socket_descriptor_t sd, struct sockaddr *localaddr, struct sockaddr *remoteaddr, const struct in_addr *vpn_ipv4, const struct in6_addr *vpn_ipv6)
int	dco_del_peer (dco_context_t *dco, unsigned int peerid)
int	dco_set_peer (dco_context_t *dco, unsigned int peerid, int keepalive_interval, int keepalive_timeout, int mss)
int	dco_new_key (dco_context_t *dco, unsigned int peerid, int keyid, dco_key_slot_t slot, const uint8_t *encrypt_key, const uint8_t *encrypt_iv, const uint8_t *decrypt_key, const uint8_t *decrypt_iv, const char *ciphername, bool epoch)
int	dco_del_key (dco_context_t *dco, unsigned int peerid, dco_key_slot_t slot)
int	dco_swap_keys (dco_context_t *dco, unsigned int peer_id)
bool	dco_available (msglvl_t msglevel)
const char *	dco_version_string (struct gc_arena *gc)
static void	dco_handle_overlapped_success (dco_context_t *dco, bool queued)
	Handles successful completion of overlapped operation.
int	dco_read_and_process (dco_context_t *dco)
int	dco_get_peer_stats_multi (dco_context_t *dco, const bool raise_sigusr1_on_err)
int	dco_get_peer_stats_fallback (struct context *c, const bool raise_sigusr1_on_err)
int	dco_get_peer_stats (struct context *c, const bool raise_sigusr1_on_err)
void	dco_event_set (dco_context_t *dco, struct event_set *es, void *arg)
const char *	dco_get_supported_ciphers (void)
bool	dco_win_supports_multipeer (void)
void	dco_win_add_iroute_ipv4 (dco_context_t *dco, in_addr_t dst, unsigned int netbits, unsigned int peer_id)
void	dco_win_add_iroute_ipv6 (dco_context_t *dco, struct in6_addr dst, unsigned int netbits, unsigned int peer_id)
void	dco_win_del_iroute_ipv4 (dco_context_t *dco, in_addr_t dst, unsigned int netbits)
void	dco_win_del_iroute_ipv6 (dco_context_t *dco, struct in6_addr dst, unsigned int netbits)
bool	dco_supports_epoch_data (struct context *c)

Function Documentation

dco_available()

bool dco_available

(

msglvl_t

msglevel

)

Definition at line 620 of file dco_win.c.

References msg.

dco_connect_wait()

void dco_connect_wait ( HANDLE handle, OVERLAPPED * ov, int timeout, struct signal_info * sig_info )

static

Definition at line 222 of file dco_win.c.

References get_signal(), M_ERR, M_ERRNO, M_NONFATAL, management_sleep(), msg, register_signal(), signal_info::signal_received, and SIGUSR1.

Referenced by dco_p2p_new_peer().

dco_del_key()

int dco_del_key	(	dco_context_t *	dco,
		unsigned int	peerid,
		dco_key_slot_t	slot )

Definition at line 586 of file dco_win.c.

References D_DCO, and msg.

dco_del_peer()

int dco_del_peer	(	dco_context_t *	dco,
		unsigned int	peerid )

Definition at line 471 of file dco_win.c.

References D_DCO_DEBUG, M_ERRNO, M_WARN, msg, OVPN_IOCTL_DEL_PEER, and OVPN_IOCTL_MP_DEL_PEER.

dco_event_set()

void dco_event_set	(	dco_context_t *	dco,
		struct event_set *	es,
		void *	arg )

Definition at line 943 of file dco_win.c.

References ASSERT, D_DCO_DEBUG, tuntap::dco, event_ctl(), EVENT_READ, IOSTATE_IMMEDIATE_RETURN, IOSTATE_INITIAL, IOSTATE_QUEUED, M_ERRNO, msg, and OVPN_IOCTL_NOTIFY_EVENT.

dco_get_peer_stats()

int dco_get_peer_stats	(	struct context *	c,
		const bool	raise_sigusr1_on_err )

Definition at line 901 of file dco_win.c.

References context::c1, context::c2, dco_get_peer_stats_fallback(), tls_multi::dco_peer_id, context_2::dco_read_bytes, context_2::dco_write_bytes, tuntap::hand, _OVPN_PEER_STATS::LinkRxBytes, _OVPN_PEER_STATS::LinkTxBytes, M_ERRNO, M_WARN, msg, OVPN_GET_PEER_STATS, OVPN_IOCTL_GET_PEER_STATS, context_2::tls_multi, context_2::tun_read_bytes, context_2::tun_write_bytes, context_1::tuntap, tuntap_defined(), _OVPN_PEER_STATS::VpnRxBytes, and _OVPN_PEER_STATS::VpnTxBytes.

dco_get_peer_stats_fallback()

int dco_get_peer_stats_fallback	(	struct context *	c,
		const bool	raise_sigusr1_on_err )

Definition at line 872 of file dco_win.c.

References context::c1, context::c2, context_2::dco_read_bytes, context_2::dco_write_bytes, tuntap::hand, M_ERRNO, M_WARN, msg, OVPN_IOCTL_GET_STATS, _OVPN_STATS::TransportBytesReceived, _OVPN_STATS::TransportBytesSent, context_2::tun_read_bytes, context_2::tun_write_bytes, _OVPN_STATS::TunBytesReceived, _OVPN_STATS::TunBytesSent, context_1::tuntap, and tuntap_defined().

Referenced by dco_get_peer_stats().

dco_get_peer_stats_multi()

int dco_get_peer_stats_multi	(	dco_context_t *	dco,
		const bool	raise_sigusr1_on_err )

Definition at line 745 of file dco_win.c.

References context::c2, multi_instance::context, tuntap::dco, context_2::dco_read_bytes, context_2::dco_write_bytes, gc, gc_free(), gc_malloc(), gc_new(), tuntap::hand, _OVPN_PEER_STATS::LinkRxBytes, _OVPN_PEER_STATS::LinkTxBytes, M_ERRNO, M_WARN, msg, OVPN_GET_PEER_STATS, OVPN_IOCTL_GET_PEER_STATS, _OVPN_PEER_STATS::PeerId, register_signal(), SIGUSR1, context_2::tun_read_bytes, context_2::tun_write_bytes, tuntap_defined(), _OVPN_PEER_STATS::VpnRxBytes, and _OVPN_PEER_STATS::VpnTxBytes.

dco_get_supported_ciphers()

const char * dco_get_supported_ciphers

(

void

)

Definition at line 991 of file dco_win.c.

References status.

dco_get_version()

bool dco_get_version ( OVPN_VERSION * version )

static

Gets version of dco-win driver.

Fills Major/Minor/Patch fields in a passed OVPN_VERSION struct. If version cannot be obtained, fields are set to 0.

Parameters

version

pointer to OVPN_VERSION struct

Returns

true if version has been obtained, false otherwise

Definition at line 73 of file dco_win.c.

References CLEAR, D_DCO_DEBUG, _OVPN_VERSION::Major, _OVPN_VERSION::Minor, msg, OVPN_IOCTL_GET_VERSION, and _OVPN_VERSION::Patch.

Referenced by dco_supports_epoch_data(), dco_version_string(), and dco_win_supports_multipeer().

dco_handle_overlapped_success()

void dco_handle_overlapped_success ( dco_context_t * dco, bool queued )

static

Handles successful completion of overlapped operation.

We use overlapped I/O (Windows term for asynchronous I/O) to get notifications from kernel to userspace. This gets the result of overlapped operation and, in case of success, copies data from kernel-filled buffer into userspace-provided dco context.

Parameters

dco	Pointer to the dco context
queued	true if operation was queued, false if it has completed immediately

Definition at line 674 of file dco_win.c.

References D_DCO_DEBUG, M_ERRNO, and msg.

Referenced by dco_read_and_process().

dco_mp_start_vpn()

void dco_mp_start_vpn	(	HANDLE	handle,
		struct link_socket *	sock )

Initializes and binds the kernel UDP transport socket for multipeer mode.

Sends OVPN_IOCTL_MP_START_VPN to create a kernel-mode UDP socket, binds it to the specified address, ready for incoming connections.

Parameters

handle	Device handle for the DCO adapter.
sock	Pointer to the link_socket structure containing socket information.

Definition at line 283 of file dco_win.c.

References _OVPN_MP_START_VPN::Addr4, _OVPN_MP_START_VPN::Addr6, addr_family_name(), link_socket_info::bind_ipv6_only, link_socket_addr::bind_local, D_DCO_DEBUG, link_socket::info, _OVPN_MP_START_VPN::IPv6Only, _OVPN_MP_START_VPN::ListenAddress, link_socket_info::lsa, M_ERR, M_FATAL, msg, OVPN_IOCTL_MP_START_VPN, SF_PREPEND_SA, and link_socket::sockflags.

Referenced by create_socket_dco_win().

dco_new_key()

int dco_new_key	(	dco_context_t *	dco,
		unsigned int	peerid,
		int	keyid,
		dco_key_slot_t	slot,
		const uint8_t *	encrypt_key,
		const uint8_t *	encrypt_iv,
		const uint8_t *	decrypt_key,
		const uint8_t *	decrypt_iv,
		const char *	ciphername,
		bool	epoch )

Definition at line 531 of file dco_win.c.

References ASSERT, cipher_kt_key_size(), _OVPN_CRYPTO_DATA::CipherAlg, CRYPTO_OPTIONS_EPOCH, _OVPN_CRYPTO_DATA_V2::CryptoOptions, D_DCO_DEBUG, _OVPN_CRYPTO_DATA::Decrypt, _OVPN_CRYPTO_DATA::Encrypt, _OVPN_KEY_DIRECTION::Key, _OVPN_CRYPTO_DATA::KeyId, _OVPN_KEY_DIRECTION::KeyLen, _OVPN_CRYPTO_DATA::KeySlot, M_ERRNO, M_WARN, msg, _OVPN_KEY_DIRECTION::NonceTail, OVPN_IOCTL_NEW_KEY, OVPN_IOCTL_NEW_KEY_V2, _OVPN_CRYPTO_DATA::PeerId, and _OVPN_CRYPTO_DATA_V2::V1.

dco_new_peer()

int dco_new_peer	(	dco_context_t *	dco,
		unsigned int	peerid,
		socket_descriptor_t	sd,
		struct sockaddr *	localaddr,
		struct sockaddr *	remoteaddr,
		const struct in_addr *	vpn_ipv4,
		const struct in6_addr *	vpn_ipv6 )

Definition at line 418 of file dco_win.c.

References _OVPN_MP_NEW_PEER::Addr4, _OVPN_MP_NEW_PEER::Addr6, D_DCO_DEBUG, _OVPN_MP_NEW_PEER::Local, M_ERRNO, M_WARN, msg, OVPN_IOCTL_MP_NEW_PEER, _OVPN_MP_NEW_PEER::PeerId, _OVPN_MP_NEW_PEER::Remote, SOCKET_PRINTF, _OVPN_MP_NEW_PEER::VpnAddr4, and _OVPN_MP_NEW_PEER::VpnAddr6.

dco_p2p_new_peer()

void dco_p2p_new_peer	(	HANDLE	handle,
		OVERLAPPED *	ov,
		struct link_socket *	sock,
		struct signal_info *	sig_info )

Definition at line 327 of file dco_win.c.

References _OVPN_NEW_PEER::Addr4, _OVPN_NEW_PEER::Addr6, addr_family_name(), ASSERT, link_socket::bind_local, link_socket_addr::bind_local, CLEAR, link_socket_addr::current_remote, D_DCO_DEBUG, dco_connect_wait(), get_server_poll_remaining_time(), link_socket::info, _OVPN_NEW_PEER::Local, link_socket_info::lsa, M_ERR, M_FATAL, msg, OVPN_IOCTL_NEW_PEER, OVPN_NEW_PEER, OVPN_PROTO_TCP, OVPN_PROTO_UDP, _OVPN_NEW_PEER::Proto, _OVPN_NEW_PEER::Remote, and link_socket::server_poll_timeout.

Referenced by create_socket_dco_win().

dco_p2p_start_vpn()

void dco_p2p_start_vpn

(

struct tuntap *

tt

)

Transitions the DCO adapter to the connected state in P2P mode.

Sends OVPN_IOCTL_START_VPN to start the VPN and waits for the adapter to become ready.

Parameters

tt	Pointer to the tuntap structure representing the adapter.

Definition at line 165 of file dco_win.c.

References tuntap::adapter_index, dco_wait_ready(), tuntap::hand, M_ERR, msg, and OVPN_IOCTL_START_VPN.

Referenced by ovpn_dco_init().

dco_read_and_process()

int dco_read_and_process

(

dco_context_t *

dco

)

Definition at line 695 of file dco_win.c.

References ASSERT, CM_TOP, D_DCO_DEBUG, dco_handle_overlapped_success(), IOSTATE_IMMEDIATE_RETURN, IOSTATE_INITIAL, IOSTATE_QUEUED, M_ERRNO, msg, multi_process_incoming_dco(), and process_incoming_dco().

dco_set_peer()

int dco_set_peer	(	dco_context_t *	dco,
		unsigned int	peerid,
		int	keepalive_interval,
		int	keepalive_timeout,
		int	mss )

Definition at line 497 of file dco_win.c.

References D_DCO_DEBUG, M_ERRNO, M_WARN, msg, OVPN_IOCTL_MP_SET_PEER, OVPN_IOCTL_SET_PEER, and OVPN_SET_PEER.

dco_supports_epoch_data()

bool dco_supports_epoch_data

(

struct context *

c

)

Definition at line 1104 of file dco_win.c.

References dco_get_version(), _OVPN_VERSION::Major, and _OVPN_VERSION::Minor.

dco_swap_keys()

int dco_swap_keys	(	dco_context_t *	dco,
		unsigned int	peer_id )

Definition at line 594 of file dco_win.c.

References D_DCO_DEBUG, M_ERRNO, M_WARN, msg, OVPN_IOCTL_MP_SWAP_KEYS, and OVPN_IOCTL_SWAP_KEYS.

dco_version_string()

const char * dco_version_string

(

struct gc_arena *

gc

)

Definition at line 647 of file dco_win.c.

References alloc_buf_gc(), BSTR, buf_printf(), dco_get_version(), gc, _OVPN_VERSION::Major, _OVPN_VERSION::Minor, and _OVPN_VERSION::Patch.

dco_wait_ready()

void dco_wait_ready ( DWORD idx )

static

Definition at line 49 of file dco_win.c.

References D_DCO_DEBUG, and msg.

Referenced by dco_p2p_start_vpn(), and ovpn_dco_init_mp().

dco_win_add_iroute_ipv4()

void dco_win_add_iroute_ipv4	(	dco_context_t *	dco,
		in_addr_t	dst,
		unsigned int	netbits,
		unsigned int	peer_id )

Definition at line 1020 of file dco_win.c.

References D_DCO_DEBUG, gc, gc_free(), gc_new(), IA_NET_ORDER, M_ERRNO, M_WARN, msg, OVPN_IOCTL_MP_ADD_IROUTE, print_in_addr_t(), and route.

dco_win_add_iroute_ipv6()

void dco_win_add_iroute_ipv6	(	dco_context_t *	dco,
		struct in6_addr	dst,
		unsigned int	netbits,
		unsigned int	peer_id )

Definition at line 1043 of file dco_win.c.

References D_DCO_DEBUG, gc, gc_free(), gc_new(), IA_NET_ORDER, M_ERRNO, M_WARN, msg, OVPN_IOCTL_MP_ADD_IROUTE, print_in6_addr(), and route.

dco_win_del_iroute_ipv4()

void dco_win_del_iroute_ipv4	(	dco_context_t *	dco,
		in_addr_t	dst,
		unsigned int	netbits )

Definition at line 1064 of file dco_win.c.

References D_DCO_DEBUG, gc, gc_free(), gc_new(), IA_NET_ORDER, M_ERRNO, M_WARN, msg, OVPN_IOCTL_MP_DEL_IROUTE, print_in_addr_t(), and route.

dco_win_del_iroute_ipv6()

void dco_win_del_iroute_ipv6	(	dco_context_t *	dco,
		struct in6_addr	dst,
		unsigned int	netbits )

Definition at line 1085 of file dco_win.c.

References D_DCO_DEBUG, gc, gc_free(), gc_new(), IA_NET_ORDER, M_ERRNO, M_WARN, msg, OVPN_IOCTL_MP_DEL_IROUTE, print_in6_addr(), and route.

dco_win_supports_multipeer()

bool dco_win_supports_multipeer

(

void

)

Definition at line 1013 of file dco_win.c.

References dco_get_version(), and _OVPN_VERSION::Major.

open_tun_dco()

int open_tun_dco	(	struct tuntap *	tt,
		openvpn_net_ctx_t *	ctx,
		const char *	dev )

Definition at line 215 of file dco_win.c.

References ASSERT.

ovpn_dco_init()

bool ovpn_dco_init

(

struct context *

c

)

Initializes DCO depends on mode.

• for P2P it puts adapter in "connected" state. The peer should be already added by dco_p2p_new_peer().
• for multipeer it opens DCO adapter and puts it into "connected" state. The server socket should be initialized later by dco_mp_start_vpn().

Definition at line 190 of file dco_win.c.

References ASSERT, context::c1, tuntap::dco, dco_p2p_start_vpn(), options::dev_node, context::mode, MODE_POINT_TO_POINT, MODE_SERVER, context::options, ovpn_dco_init_mp(), and context_1::tuntap.

ovpn_dco_init_mp()

void ovpn_dco_init_mp	(	dco_context_t *	dco,
		const char *	dev_node )

Initializes the DCO adapter in multipeer mode and sets it to "connected" state.

Opens the DCO device, sets the adapter mode using OVPN_IOCTL_SET_MODE, which transitions the adapter to the "connected" state, and waits for it to become ready.

Parameters

dco	Pointer to the dco_context_t structure representing the DCO context.
dev_node	Device node string for the DCO adapter.

Definition at line 122 of file dco_win.c.

References ASSERT, dco_wait_ready(), gc, gc_free(), gc_new(), M_ERR, msg, OVPN_IOCTL_SET_MODE, OVPN_MODE_MP, and tun_open_device().

Referenced by ovpn_dco_init().