#include <freerdp/config.h>
#include "settings.h"
#include <winpr/assert.h>
#include <winpr/crt.h>
#include <winpr/synch.h>
#include <winpr/print.h>
#include <winpr/stream.h>
#include <winpr/winsock.h>
#include <winpr/crypto.h>
#include <freerdp/log.h>
#include <freerdp/error.h>
#include <freerdp/utils/ringbuffer.h>
#include <openssl/bio.h>
#include <time.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <sys/socket.h>
#include "tpkt.h"
#include "fastpath.h"
#include "transport.h"
#include "rdp.h"
#include "proxy.h"
#include "utils.h"
#include "state.h"
#include "childsession.h"
#include "gateway/rdg.h"
#include "gateway/wst.h"
#include "gateway/arm.h"

Macros
#define	TAG FREERDP_TAG("core.transport")

#define	BUFFER_SIZE 16384

#define	WLog_ERR_BIO(transport, biofunc, bio) transport_bio_error_log(transport, biofunc, bio, __FILE__, __func__, __LINE__)

Functions
static void	transport_ssl_cb (const SSL *ssl, int where, int ret)

wStream *	transport_send_stream_init (rdpTransport *transport, size_t size)

BOOL	transport_attach (rdpTransport *transport, int sockfd)
	Attach a socket to the transport layer. More...

static BOOL	transport_default_attach (rdpTransport *transport, int sockfd)

BOOL	transport_connect_rdp (rdpTransport *transport)

BOOL	transport_connect_tls (rdpTransport *transport)

static BOOL	transport_default_connect_tls (rdpTransport *transport)

BOOL	transport_connect_nla (rdpTransport *transport, BOOL earlyUserAuth)

BOOL	transport_connect_rdstls (rdpTransport *transport)

BOOL	transport_connect_aad (rdpTransport *transport)

BOOL	transport_connect (rdpTransport transport, const char hostname, UINT16 port, DWORD timeout)

BOOL	transport_connect_childsession (rdpTransport *transport)

BOOL	transport_accept_rdp (rdpTransport *transport)

BOOL	transport_accept_tls (rdpTransport *transport)

static BOOL	transport_default_accept_tls (rdpTransport *transport)

BOOL	transport_accept_nla (rdpTransport *transport)

BOOL	transport_accept_rdstls (rdpTransport *transport)

static void	transport_bio_error_log (rdpTransport transport, LPCSTR biofunc, BIO bio, LPCSTR file, LPCSTR func, DWORD line)

static SSIZE_T	transport_read_layer (rdpTransport transport, BYTE data, size_t bytes)

static SSIZE_T	transport_read_layer_bytes (rdpTransport transport, wStream s, size_t toRead)
	Tries to read toRead bytes from the specified transport. More...

int	transport_read_pdu (rdpTransport transport, wStream s)
	Try to read a complete PDU (NLA, fast-path or tpkt) from the underlying transport. More...

static SSIZE_T	parse_nla_mode_pdu (rdpTransport transport, wStream stream)

static SSIZE_T	parse_default_mode_pdu (rdpTransport transport, wStream stream)

SSIZE_T	transport_parse_pdu (rdpTransport transport, wStream s, BOOL *incomplete)

static int	transport_default_read_pdu (rdpTransport transport, wStream s)

int	transport_write (rdpTransport transport, wStream s)

static int	transport_default_write (rdpTransport transport, wStream s)

BOOL	transport_get_public_key (rdpTransport transport, const BYTE data, DWORD length)

static BOOL	transport_default_get_public_key (rdpTransport transport, const BYTE data, DWORD length)

DWORD	transport_get_event_handles (rdpTransport transport, HANDLE events, DWORD count)

BOOL	transport_is_write_blocked (rdpTransport *transport)

int	transport_drain_output_buffer (rdpTransport *transport)

int	transport_check_fds (rdpTransport *transport)

BOOL	transport_set_blocking_mode (rdpTransport *transport, BOOL blocking)

static BOOL	transport_default_set_blocking_mode (rdpTransport *transport, BOOL blocking)

rdpTransportLayer *	transport_connect_layer (rdpTransport transport, const char hostname, int port, DWORD timeout)

static rdpTransportLayer *	transport_default_connect_layer (rdpTransport transport, const char hostname, int port, DWORD timeout)

BOOL	transport_attach_layer (rdpTransport transport, rdpTransportLayer layer)
	Attach a transport layer. More...

static BOOL	transport_default_attach_layer (rdpTransport transport, rdpTransportLayer layer)

void	transport_set_gateway_enabled (rdpTransport *transport, BOOL GatewayEnabled)

void	transport_set_nla_mode (rdpTransport *transport, BOOL NlaMode)

void	transport_set_rdstls_mode (rdpTransport *transport, BOOL RdstlsMode)

void	transport_set_aad_mode (rdpTransport *transport, BOOL AadMode)

BOOL	transport_disconnect (rdpTransport *transport)

static BOOL	transport_default_disconnect (rdpTransport *transport)

rdpTransport *	transport_new (rdpContext *context)

void	transport_free (rdpTransport *transport)

BOOL	transport_set_io_callbacks (rdpTransport transport, const rdpTransportIo io_callbacks)

const rdpTransportIo *	transport_get_io_callbacks (rdpTransport *transport)

rdpContext *	transport_get_context (rdpTransport *transport)

rdpTransport *	freerdp_get_transport (rdpContext *context)

BOOL	transport_set_nla (rdpTransport transport, rdpNla nla)

rdpNla *	transport_get_nla (rdpTransport *transport)

BOOL	transport_set_tls (rdpTransport transport, rdpTls tls)

rdpTls *	transport_get_tls (rdpTransport *transport)

BOOL	transport_set_tsg (rdpTransport transport, rdpTsg tsg)

rdpTsg *	transport_get_tsg (rdpTransport *transport)

wStream *	transport_take_from_pool (rdpTransport *transport, size_t size)

ULONG	transport_get_bytes_sent (rdpTransport *transport, BOOL resetCount)

TRANSPORT_LAYER	transport_get_layer (rdpTransport *transport)

BOOL	transport_set_layer (rdpTransport *transport, TRANSPORT_LAYER layer)

BOOL	transport_set_connected_event (rdpTransport *transport)

BOOL	transport_set_recv_callbacks (rdpTransport transport, TransportRecv recv, void extra)

BOOL	transport_get_blocking (rdpTransport *transport)

BOOL	transport_set_blocking (rdpTransport *transport, BOOL blocking)

BOOL	transport_have_more_bytes_to_read (rdpTransport *transport)

int	transport_tcp_connect (rdpTransport transport, const char hostname, int port, DWORD timeout)

HANDLE	transport_get_front_bio (rdpTransport *transport)

BOOL	transport_io_callback_set_event (rdpTransport *transport, BOOL set)

void	transport_set_early_user_auth_mode (rdpTransport *transport, BOOL EUAMode)

rdpTransportLayer *	transport_layer_new (rdpTransport *transport, size_t contextSize)

void	transport_layer_free (rdpTransportLayer *layer)

static int	transport_layer_bio_write (BIO bio, const char buf, int size)

static int	transport_layer_bio_read (BIO bio, char buf, int size)

static int	transport_layer_bio_puts (BIO bio, const char str)

static int	transport_layer_bio_gets (BIO bio, char str, int size)

static long	transport_layer_bio_ctrl (BIO bio, int cmd, long arg1, void arg2)

static int	transport_layer_bio_new (BIO *bio)

static int	transport_layer_bio_free (BIO *bio)

BIO_METHOD *	BIO_s_transport_layer (void)

Macro Definition Documentation

◆ BUFFER_SIZE

#define BUFFER_SIZE 16384

◆ TAG

#define TAG FREERDP_TAG("core.transport")

FreeRDP: A Remote Desktop Protocol Implementation Network Transport Layer

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

◆ WLog_ERR_BIO

#define WLog_ERR_BIO	(	transport,
		biofunc,
		bio
	)	transport_bio_error_log(transport, biofunc, bio, __FILE__, __func__, __LINE__)

Function Documentation

◆ BIO_s_transport_layer()

BIO_METHOD* BIO_s_transport_layer ( void )

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◆ freerdp_get_transport()

rdpTransport* freerdp_get_transport ( rdpContext * context )

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◆ parse_default_mode_pdu()

static SSIZE_T parse_default_mode_pdu	(	rdpTransport *	transport,
		wStream *	stream
	)

static

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◆ parse_nla_mode_pdu()

static SSIZE_T parse_nla_mode_pdu	(	rdpTransport *	transport,
		wStream *	stream
	)

static

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◆ transport_accept_nla()

BOOL transport_accept_nla ( rdpTransport * transport )

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◆ transport_accept_rdp()

BOOL transport_accept_rdp ( rdpTransport * transport )

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◆ transport_accept_rdstls()

BOOL transport_accept_rdstls ( rdpTransport * transport )

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◆ transport_accept_tls()

BOOL transport_accept_tls ( rdpTransport * transport )

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◆ transport_attach()

BOOL transport_attach	(	rdpTransport *	transport,
		int	sockfd
	)

Attach a socket to the transport layer.

!

The ownership of the socket provided by sockfd is taken if and only if the function is successful. In such a case the caller must no longer close or otherwise use the socket. If the function fails it is up to the caller to close the socket.

The implementation can be overridden by transport_set_io_callbacks(rdpTransportIo::TransportAttach)

Parameters

transport	The transport instance to attach the socket to
sockfd	The socket to attach to the transport

Returns: TRUE in case of success, FALSE otherwise.

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◆ transport_attach_layer()

BOOL transport_attach_layer	(	rdpTransport *	transport,
		rdpTransportLayer *	layer
	)

Attach a transport layer.

!

The ownership of the transport layer provided by layer is taken if and only if the function is successful. In such a case the caller must no longer free or otherwise use the layer. If the function fails it is up to the caller to free the layer.

The implementation can be overridden by transport_set_io_callbacks(rdpTransportIo::AttachLayer)

Parameters

transport	The transport instance to attach the socket to
layer	The layer to attach to the transport

Returns: TRUE in case of success, FALSE otherwise.

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◆ transport_bio_error_log()

static void transport_bio_error_log	(	rdpTransport *	transport,
		LPCSTR	biofunc,
		BIO *	bio,
		LPCSTR	file,
		LPCSTR	func,
		DWORD	line
	)

static

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◆ transport_check_fds()

int transport_check_fds ( rdpTransport * transport )

Note: transport_read_pdu tries to read one PDU from the transport layer. The ReceiveBuffer might have a position > 0 in case of a non blocking transport. If transport_read_pdu returns 0 the pdu couldn't be read at this point. Note that transport->ReceiveBuffer is replaced after each iteration of this loop with a fresh stream instance from a pool.

status: -1: error 0: success 1: redirection

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◆ transport_connect()

BOOL transport_connect	(	rdpTransport *	transport,
		const char *	hostname,
		UINT16	port,
		DWORD	timeout
	)

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◆ transport_connect_aad()

BOOL transport_connect_aad ( rdpTransport * transport )

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◆ transport_connect_childsession()

BOOL transport_connect_childsession ( rdpTransport * transport )

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◆ transport_connect_layer()

rdpTransportLayer* transport_connect_layer	(	rdpTransport *	transport,
		const char *	hostname,
		int	port,
		DWORD	timeout
	)

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◆ transport_connect_nla()

BOOL transport_connect_nla	(	rdpTransport *	transport,
		BOOL	earlyUserAuth
	)

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◆ transport_connect_rdp()

BOOL transport_connect_rdp ( rdpTransport * transport )

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◆ transport_connect_rdstls()

BOOL transport_connect_rdstls ( rdpTransport * transport )

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◆ transport_connect_tls()

BOOL transport_connect_tls ( rdpTransport * transport )

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◆ transport_default_accept_tls()

static BOOL transport_default_accept_tls ( rdpTransport * transport )

static

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◆ transport_default_attach()

static BOOL transport_default_attach	(	rdpTransport *	transport,
		int	sockfd
	)

static

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◆ transport_default_attach_layer()

static BOOL transport_default_attach_layer	(	rdpTransport *	transport,
		rdpTransportLayer *	layer
	)

static

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◆ transport_default_connect_layer()

static rdpTransportLayer* transport_default_connect_layer	(	rdpTransport *	transport,
		const char *	hostname,
		int	port,
		DWORD	timeout
	)

static

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◆ transport_default_connect_tls()

static BOOL transport_default_connect_tls ( rdpTransport * transport )

static

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◆ transport_default_disconnect()

static BOOL transport_default_disconnect ( rdpTransport * transport )

static

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◆ transport_default_get_public_key()

static BOOL transport_default_get_public_key	(	rdpTransport *	transport,
		const BYTE **	data,
		DWORD *	length
	)

static

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◆ transport_default_read_pdu()

static int transport_default_read_pdu	(	rdpTransport *	transport,
		wStream *	s
	)

static

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◆ transport_default_set_blocking_mode()

static BOOL transport_default_set_blocking_mode	(	rdpTransport *	transport,
		BOOL	blocking
	)

static

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◆ transport_default_write()

static int transport_default_write	(	rdpTransport *	transport,
		wStream *	s
	)

static

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◆ transport_disconnect()

BOOL transport_disconnect ( rdpTransport * transport )

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◆ transport_drain_output_buffer()

int transport_drain_output_buffer ( rdpTransport * transport )

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◆ transport_free()

void transport_free ( rdpTransport * transport )

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◆ transport_get_blocking()

BOOL transport_get_blocking ( rdpTransport * transport )

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◆ transport_get_bytes_sent()

ULONG transport_get_bytes_sent	(	rdpTransport *	transport,
		BOOL	resetCount
	)

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◆ transport_get_context()

rdpContext* transport_get_context ( rdpTransport * transport )

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◆ transport_get_event_handles()

DWORD transport_get_event_handles	(	rdpTransport *	transport,
		HANDLE *	events,
		DWORD	count
	)

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◆ transport_get_front_bio()

HANDLE transport_get_front_bio ( rdpTransport * transport )

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◆ transport_get_io_callbacks()

const rdpTransportIo* transport_get_io_callbacks ( rdpTransport * transport )

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◆ transport_get_layer()

TRANSPORT_LAYER transport_get_layer ( rdpTransport * transport )

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◆ transport_get_nla()

rdpNla* transport_get_nla ( rdpTransport * transport )

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◆ transport_get_public_key()

BOOL transport_get_public_key	(	rdpTransport *	transport,
		const BYTE **	data,
		DWORD *	length
	)

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◆ transport_get_tls()

rdpTls* transport_get_tls ( rdpTransport * transport )

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◆ transport_get_tsg()

rdpTsg* transport_get_tsg ( rdpTransport * transport )

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◆ transport_have_more_bytes_to_read()

BOOL transport_have_more_bytes_to_read ( rdpTransport * transport )

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◆ transport_io_callback_set_event()

BOOL transport_io_callback_set_event	(	rdpTransport *	transport,
		BOOL	set
	)

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◆ transport_is_write_blocked()

BOOL transport_is_write_blocked ( rdpTransport * transport )

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◆ transport_layer_bio_ctrl()

static long transport_layer_bio_ctrl	(	BIO *	bio,
		int	cmd,
		long	arg1,
		void *	arg2
	)

static

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◆ transport_layer_bio_free()

static int transport_layer_bio_free ( BIO * bio )

static

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◆ transport_layer_bio_gets()

static int transport_layer_bio_gets	(	BIO *	bio,
		char *	str,
		int	size
	)

static

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◆ transport_layer_bio_new()

static int transport_layer_bio_new ( BIO * bio )

static

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◆ transport_layer_bio_puts()

static int transport_layer_bio_puts	(	BIO *	bio,
		const char *	str
	)

static

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◆ transport_layer_bio_read()

static int transport_layer_bio_read	(	BIO *	bio,
		char *	buf,
		int	size
	)

static

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◆ transport_layer_bio_write()

static int transport_layer_bio_write	(	BIO *	bio,
		const char *	buf,
		int	size
	)

static

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◆ transport_layer_free()

void transport_layer_free ( rdpTransportLayer * layer )

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◆ transport_layer_new()

rdpTransportLayer* transport_layer_new	(	rdpTransport *	transport,
		size_t	contextSize
	)

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◆ transport_new()

rdpTransport* transport_new ( rdpContext * context )

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◆ transport_parse_pdu()

SSIZE_T transport_parse_pdu	(	rdpTransport *	transport,
		wStream *	s,
		BOOL *	incomplete
	)

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◆ transport_read_layer()

static SSIZE_T transport_read_layer	(	rdpTransport *	transport,
		BYTE *	data,
		size_t	bytes
	)

static

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◆ transport_read_layer_bytes()

static SSIZE_T transport_read_layer_bytes	(	rdpTransport *	transport,
		wStream *	s,
		size_t	toRead
	)

static

Tries to read toRead bytes from the specified transport.

Try to read toRead bytes from the transport to the stream. In case it was not possible to read toRead bytes 0 is returned. The stream is always advanced by the number of bytes read.

The function assumes that the stream has enough capacity to hold the data.

Parameters

[in]	transport	rdpTransport
[in]	s	wStream
[in]	toRead	number of bytes to read

Returns: < 0 on error; 0 if not enough data is available (non blocking mode); 1 toRead bytes read

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◆ transport_read_pdu()

int transport_read_pdu	(	rdpTransport *	transport,
		wStream *	s
	)

Try to read a complete PDU (NLA, fast-path or tpkt) from the underlying transport.

If possible a complete PDU is read, in case of non blocking transport this might not succeed. Except in case of an error the passed stream will point to the last byte read (correct position). When the pdu read is completed the stream is sealed and the pointer set to 0

Parameters

[in]	transport	rdpTransport
[in]	s	wStream

Returns: < 0 on error; 0 if not enough data is available (non blocking mode); > 0 number of bytes of the complete pdu read

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◆ transport_send_stream_init()

wStream* transport_send_stream_init	(	rdpTransport *	transport,
		size_t	size
	)

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◆ transport_set_aad_mode()

void transport_set_aad_mode	(	rdpTransport *	transport,
		BOOL	AadMode
	)

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◆ transport_set_blocking()

BOOL transport_set_blocking	(	rdpTransport *	transport,
		BOOL	blocking
	)

◆ transport_set_blocking_mode()

BOOL transport_set_blocking_mode	(	rdpTransport *	transport,
		BOOL	blocking
	)

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◆ transport_set_connected_event()

BOOL transport_set_connected_event ( rdpTransport * transport )

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◆ transport_set_early_user_auth_mode()

void transport_set_early_user_auth_mode	(	rdpTransport *	transport,
		BOOL	EUAMode
	)

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◆ transport_set_gateway_enabled()

void transport_set_gateway_enabled	(	rdpTransport *	transport,
		BOOL	GatewayEnabled
	)

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◆ transport_set_io_callbacks()

BOOL transport_set_io_callbacks	(	rdpTransport *	transport,
		const rdpTransportIo *	io_callbacks
	)

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◆ transport_set_layer()

BOOL transport_set_layer	(	rdpTransport *	transport,
		TRANSPORT_LAYER	layer
	)

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◆ transport_set_nla()

BOOL transport_set_nla	(	rdpTransport *	transport,
		rdpNla *	nla
	)

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◆ transport_set_nla_mode()

void transport_set_nla_mode	(	rdpTransport *	transport,
		BOOL	NlaMode
	)

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◆ transport_set_rdstls_mode()

void transport_set_rdstls_mode	(	rdpTransport *	transport,
		BOOL	RdstlsMode
	)

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◆ transport_set_recv_callbacks()

BOOL transport_set_recv_callbacks	(	rdpTransport *	transport,
		TransportRecv	recv,
		void *	extra
	)

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◆ transport_set_tls()

BOOL transport_set_tls	(	rdpTransport *	transport,
		rdpTls *	tls
	)

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◆ transport_set_tsg()

BOOL transport_set_tsg	(	rdpTransport *	transport,
		rdpTsg *	tsg
	)

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◆ transport_ssl_cb()

static void transport_ssl_cb	(	const SSL *	ssl,
		int	where,
		int	ret
	)

static

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◆ transport_take_from_pool()

wStream* transport_take_from_pool	(	rdpTransport *	transport,
		size_t	size
	)

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◆ transport_tcp_connect()

int transport_tcp_connect	(	rdpTransport *	transport,
		const char *	hostname,
		int	port,
		DWORD	timeout
	)

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◆ transport_write()

int transport_write	(	rdpTransport *	transport,
		wStream *	s
	)

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Macros

Functions

Macro Definition Documentation

◆ BUFFER_SIZE

◆ TAG

◆ WLog_ERR_BIO

Function Documentation

◆ BIO_s_transport_layer()

◆ freerdp_get_transport()

◆ parse_default_mode_pdu()

◆ parse_nla_mode_pdu()

◆ transport_accept_nla()

◆ transport_accept_rdp()

◆ transport_accept_rdstls()

◆ transport_accept_tls()

◆ transport_attach()

◆ transport_attach_layer()

◆ transport_bio_error_log()

◆ transport_check_fds()

◆ transport_connect()

◆ transport_connect_aad()

◆ transport_connect_childsession()

◆ transport_connect_layer()

◆ transport_connect_nla()

◆ transport_connect_rdp()

◆ transport_connect_rdstls()

◆ transport_connect_tls()

◆ transport_default_accept_tls()

◆ transport_default_attach()

◆ transport_default_attach_layer()

◆ transport_default_connect_layer()

◆ transport_default_connect_tls()

◆ transport_default_disconnect()

◆ transport_default_get_public_key()

◆ transport_default_read_pdu()

◆ transport_default_set_blocking_mode()

◆ transport_default_write()

◆ transport_disconnect()

◆ transport_drain_output_buffer()

◆ transport_free()

◆ transport_get_blocking()

◆ transport_get_bytes_sent()

◆ transport_get_context()

◆ transport_get_event_handles()

◆ transport_get_front_bio()

◆ transport_get_io_callbacks()

◆ transport_get_layer()

◆ transport_get_nla()

◆ transport_get_public_key()

◆ transport_get_tls()

◆ transport_get_tsg()

◆ transport_have_more_bytes_to_read()

◆ transport_io_callback_set_event()

◆ transport_is_write_blocked()

◆ transport_layer_bio_ctrl()

◆ transport_layer_bio_free()

◆ transport_layer_bio_gets()

◆ transport_layer_bio_new()

◆ transport_layer_bio_puts()

◆ transport_layer_bio_read()

◆ transport_layer_bio_write()

◆ transport_layer_free()

◆ transport_layer_new()

◆ transport_new()

◆ transport_parse_pdu()

◆ transport_read_layer()

◆ transport_read_layer_bytes()

◆ transport_read_pdu()

◆ transport_send_stream_init()

◆ transport_set_aad_mode()

◆ transport_set_blocking()

◆ transport_set_blocking_mode()

◆ transport_set_connected_event()

◆ transport_set_early_user_auth_mode()

◆ transport_set_gateway_enabled()

◆ transport_set_io_callbacks()

◆ transport_set_layer()

◆ transport_set_nla()

◆ transport_set_nla_mode()

◆ transport_set_rdstls_mode()