FreeRDP
transport.c File Reference
#include <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"

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__, __FUNCTION__, __LINE__)
 

Functions

static void transport_ssl_cb (SSL *ssl, int where, int ret)
 
wStream * transport_send_stream_init (rdpTransport *transport, int size)
 
BOOL transport_attach (rdpTransport *transport, int sockfd)
 
BOOL transport_connect_rdp (rdpTransport *transport)
 
BOOL transport_connect_tls (rdpTransport *transport)
 
BOOL transport_connect_nla (rdpTransport *transport)
 
BOOL transport_connect (rdpTransport *transport, const char *hostname, UINT16 port, int timeout)
 
BOOL transport_accept_rdp (rdpTransport *transport)
 
BOOL transport_accept_tls (rdpTransport *transport)
 
BOOL transport_accept_nla (rdpTransport *transport)
 
static void transport_bio_error_log (rdpTransport *transport, LPCSTR biofunc, BIO *bio, LPCSTR file, LPCSTR func, DWORD line)
 
int transport_read_layer (rdpTransport *transport, BYTE *data, int bytes)
 
static int transport_read_layer_bytes (rdpTransport *transport, wStream *s, unsigned int 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...
 
int transport_write (rdpTransport *transport, wStream *s)
 
DWORD transport_get_event_handles (rdpTransport *transport, HANDLE *events, DWORD count)
 
void transport_get_fds (rdpTransport *transport, void **rfds, int *rcount)
 
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)
 
void transport_set_gateway_enabled (rdpTransport *transport, BOOL GatewayEnabled)
 
void transport_set_nla_mode (rdpTransport *transport, BOOL NlaMode)
 
BOOL transport_disconnect (rdpTransport *transport)
 
rdpTransport * transport_new (rdpContext *context)
 
void transport_free (rdpTransport *transport)
 

Macro Definition Documentation

#define BUFFER_SIZE   16384
#define TAG   FREERDP_TAG("core.transport")

FreeRDP: A Remote Desktop Protocol Implementation Network Transport Layer

Copyright 2011 Vic Lee

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.

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

Function Documentation

BOOL transport_accept_nla ( rdpTransport *  transport)

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BOOL transport_accept_rdp ( rdpTransport *  transport)

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BOOL transport_accept_tls ( rdpTransport *  transport)

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BOOL transport_attach ( rdpTransport *  transport,
int  sockfd 
)

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

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

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BOOL transport_connect_nla ( rdpTransport *  transport)

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BOOL transport_connect_rdp ( rdpTransport *  transport)

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BOOL transport_connect_tls ( rdpTransport *  transport)

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BOOL transport_disconnect ( rdpTransport *  transport)

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int transport_drain_output_buffer ( rdpTransport *  transport)

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void transport_free ( rdpTransport *  transport)

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

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void transport_get_fds ( rdpTransport *  transport,
void **  rfds,
int *  rcount 
)

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BOOL transport_is_write_blocked ( rdpTransport *  transport)

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rdpTransport* transport_new ( rdpContext *  context)

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int transport_read_layer ( rdpTransport *  transport,
BYTE data,
int  bytes 
)

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static int transport_read_layer_bytes ( rdpTransport *  transport,
wStream *  s,
unsigned int  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]transportrdpTransport
[in]swStream
[in]toReadnumber 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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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]transportrdpTransport
[in]swStream
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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wStream* transport_send_stream_init ( rdpTransport *  transport,
int  size 
)

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BOOL transport_set_blocking_mode ( rdpTransport *  transport,
BOOL  blocking 
)

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void transport_set_gateway_enabled ( rdpTransport *  transport,
BOOL  GatewayEnabled 
)

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void transport_set_nla_mode ( rdpTransport *  transport,
BOOL  NlaMode 
)

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

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int transport_write ( rdpTransport *  transport,
wStream *  s 
)

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