/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Terminal Server Gateway (TSG)
*
* Copyright 2012 Fujitsu Technology Solutions GmbH
* Copyright 2012 Dmitrij Jasnov <dmitrij.jasnov@ts.fujitsu.com>
* Copyright 2015 Thincast Technologies GmbH
* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <winpr/crt.h>
#include <winpr/ndr.h>
#include <winpr/error.h>
#include <winpr/print.h>
#include <winpr/stream.h>
#include <freerdp/log.h>
#include "rpc_bind.h"
#include "rpc_client.h"
#include "tsg.h"
#include "../../crypto/opensslcompat.h"
#define TAG FREERDP_TAG("core.gateway.tsg")
typedef WCHAR* RESOURCENAME;
typedef struct _tsendpointinfo
{
RESOURCENAME* resourceName;
UINT32 numResourceNames;
RESOURCENAME* alternateResourceNames;
UINT16 numAlternateResourceNames;
UINT32 Port;
} TSENDPOINTINFO, *PTSENDPOINTINFO;
typedef struct _TSG_PACKET_HEADER
{
UINT16 ComponentId;
UINT16 PacketId;
} TSG_PACKET_HEADER, *PTSG_PACKET_HEADER;
typedef struct _TSG_CAPABILITY_NAP
{
UINT32 capabilities;
} TSG_CAPABILITY_NAP, *PTSG_CAPABILITY_NAP;
typedef union {
TSG_CAPABILITY_NAP tsgCapNap;
} TSG_CAPABILITIES_UNION, *PTSG_CAPABILITIES_UNION;
typedef struct _TSG_PACKET_CAPABILITIES
{
UINT32 capabilityType;
TSG_CAPABILITIES_UNION tsgPacket;
} TSG_PACKET_CAPABILITIES, *PTSG_PACKET_CAPABILITIES;
typedef struct _TSG_PACKET_VERSIONCAPS
{
TSG_PACKET_HEADER tsgHeader;
PTSG_PACKET_CAPABILITIES tsgCaps;
UINT32 numCapabilities;
UINT16 majorVersion;
UINT16 minorVersion;
UINT16 quarantineCapabilities;
} TSG_PACKET_VERSIONCAPS, *PTSG_PACKET_VERSIONCAPS;
typedef struct _TSG_PACKET_QUARCONFIGREQUEST
{
UINT32 flags;
} TSG_PACKET_QUARCONFIGREQUEST, *PTSG_PACKET_QUARCONFIGREQUEST;
typedef struct _TSG_PACKET_QUARREQUEST
{
UINT32 flags;
WCHAR* machineName;
UINT32 nameLength;
BYTE* data;
UINT32 dataLen;
} TSG_PACKET_QUARREQUEST, *PTSG_PACKET_QUARREQUEST;
typedef struct _TSG_REDIRECTION_FLAGS
{
BOOL enableAllRedirections;
BOOL disableAllRedirections;
BOOL driveRedirectionDisabled;
BOOL printerRedirectionDisabled;
BOOL portRedirectionDisabled;
BOOL reserved;
BOOL clipboardRedirectionDisabled;
BOOL pnpRedirectionDisabled;
} TSG_REDIRECTION_FLAGS, *PTSG_REDIRECTION_FLAGS;
typedef struct _TSG_PACKET_RESPONSE
{
UINT32 flags;
UINT32 reserved;
BYTE* responseData;
UINT32 responseDataLen;
TSG_REDIRECTION_FLAGS redirectionFlags;
} TSG_PACKET_RESPONSE, *PTSG_PACKET_RESPONSE;
typedef struct _TSG_PACKET_QUARENC_RESPONSE
{
UINT32 flags;
UINT32 certChainLen;
WCHAR* certChainData;
GUID nonce;
PTSG_PACKET_VERSIONCAPS versionCaps;
} TSG_PACKET_QUARENC_RESPONSE, *PTSG_PACKET_QUARENC_RESPONSE;
typedef struct TSG_PACKET_STRING_MESSAGE
{
INT32 isDisplayMandatory;
INT32 isConsentMandatory;
UINT32 msgBytes;
WCHAR* msgBuffer;
} TSG_PACKET_STRING_MESSAGE;
typedef struct TSG_PACKET_REAUTH_MESSAGE
{
UINT64 tunnelContext;
} TSG_PACKET_REAUTH_MESSAGE, *PTSG_PACKET_REAUTH_MESSAGE;
typedef struct _TSG_PACKET_MSG_RESPONSE
{
UINT32 msgID;
UINT32 msgType;
INT32 isMsgPresent;
} TSG_PACKET_MSG_RESPONSE, *PTSG_PACKET_MSG_RESPONSE;
typedef struct TSG_PACKET_CAPS_RESPONSE
{
TSG_PACKET_QUARENC_RESPONSE pktQuarEncResponse;
TSG_PACKET_MSG_RESPONSE pktConsentMessage;
} TSG_PACKET_CAPS_RESPONSE, *PTSG_PACKET_CAPS_RESPONSE;
typedef struct TSG_PACKET_MSG_REQUEST
{
UINT32 maxMessagesPerBatch;
} TSG_PACKET_MSG_REQUEST, *PTSG_PACKET_MSG_REQUEST;
typedef struct _TSG_PACKET_AUTH
{
TSG_PACKET_VERSIONCAPS tsgVersionCaps;
UINT32 cookieLen;
BYTE* cookie;
} TSG_PACKET_AUTH, *PTSG_PACKET_AUTH;
typedef union {
PTSG_PACKET_VERSIONCAPS packetVersionCaps;
PTSG_PACKET_AUTH packetAuth;
} TSG_INITIAL_PACKET_TYPE_UNION, *PTSG_INITIAL_PACKET_TYPE_UNION;
typedef struct TSG_PACKET_REAUTH
{
UINT64 tunnelContext;
UINT32 packetId;
TSG_INITIAL_PACKET_TYPE_UNION tsgInitialPacket;
} TSG_PACKET_REAUTH, *PTSG_PACKET_REAUTH;
typedef union {
PTSG_PACKET_HEADER packetHeader;
PTSG_PACKET_VERSIONCAPS packetVersionCaps;
PTSG_PACKET_QUARCONFIGREQUEST packetQuarConfigRequest;
PTSG_PACKET_QUARREQUEST packetQuarRequest;
PTSG_PACKET_RESPONSE packetResponse;
PTSG_PACKET_QUARENC_RESPONSE packetQuarEncResponse;
PTSG_PACKET_CAPS_RESPONSE packetCapsResponse;
PTSG_PACKET_MSG_REQUEST packetMsgRequest;
PTSG_PACKET_MSG_RESPONSE packetMsgResponse;
PTSG_PACKET_AUTH packetAuth;
PTSG_PACKET_REAUTH packetReauth;
} TSG_PACKET_TYPE_UNION;
typedef struct _TSG_PACKET
{
UINT32 packetId;
TSG_PACKET_TYPE_UNION tsgPacket;
} TSG_PACKET, *PTSG_PACKET;
struct rdp_tsg
{
BIO* bio;
rdpRpc* rpc;
UINT16 Port;
LPWSTR Hostname;
LPWSTR MachineName;
TSG_STATE state;
UINT32 TunnelId;
UINT32 ChannelId;
BOOL reauthSequence;
rdpSettings* settings;
rdpTransport* transport;
UINT64 ReauthTunnelContext;
CONTEXT_HANDLE TunnelContext;
CONTEXT_HANDLE ChannelContext;
CONTEXT_HANDLE NewTunnelContext;
CONTEXT_HANDLE NewChannelContext;
TSG_PACKET_REAUTH packetReauth;
TSG_PACKET_CAPABILITIES tsgCaps;
TSG_PACKET_VERSIONCAPS packetVersionCaps;
};
static BOOL tsg_stream_align(wStream* s, size_t align)
{
size_t pos;
size_t offset = 0;
if (!s)
return FALSE;
pos = Stream_GetPosition(s);
if ((pos % align) != 0)
offset = align - pos % align;
return Stream_SafeSeek(s, offset);
}
static BIO_METHOD* BIO_s_tsg(void);
/**
* RPC Functions: http://msdn.microsoft.com/en-us/library/windows/desktop/aa378623/
* Remote Procedure Call: http://msdn.microsoft.com/en-us/library/windows/desktop/aa378651/
* RPC NDR Interface Reference: http://msdn.microsoft.com/en-us/library/windows/desktop/hh802752/
*/
/**
* call sequence with silent reauth:
*
* TsProxyCreateTunnelRequest()
* TsProxyCreateTunnelResponse(TunnelContext)
* TsProxyAuthorizeTunnelRequest(TunnelContext)
* TsProxyAuthorizeTunnelResponse()
* TsProxyMakeTunnelCallRequest(TunnelContext)
* TsProxyCreateChannelRequest(TunnelContext)
* TsProxyCreateChannelResponse(ChannelContext)
* TsProxySetupReceivePipeRequest(ChannelContext)
* TsProxySendToServerRequest(ChannelContext)
*
* ...
*
* TsProxyMakeTunnelCallResponse(reauth)
* TsProxyCreateTunnelRequest()
* TsProxyMakeTunnelCallRequest(TunnelContext)
* TsProxyCreateTunnelResponse(NewTunnelContext)
* TsProxyAuthorizeTunnelRequest(NewTunnelContext)
* TsProxyAuthorizeTunnelResponse()
* TsProxyCreateChannelRequest(NewTunnelContext)
* TsProxyCreateChannelResponse(NewChannelContext)
* TsProxyCloseChannelRequest(NewChannelContext)
* TsProxyCloseTunnelRequest(NewTunnelContext)
* TsProxyCloseChannelResponse(NullChannelContext)
* TsProxyCloseTunnelResponse(NullTunnelContext)
* TsProxySendToServerRequest(ChannelContext)
*/
static int TsProxySendToServer(handle_t IDL_handle, const byte pRpcMessage[], UINT32 count,
UINT32* lengths)
{
wStream* s;
rdpTsg* tsg;
int length;
const byte* buffer1 = NULL;
const byte* buffer2 = NULL;
const byte* buffer3 = NULL;
UINT32 buffer1Length;
UINT32 buffer2Length;
UINT32 buffer3Length;
UINT32 numBuffers = 0;
UINT32 totalDataBytes = 0;
tsg = (rdpTsg*)IDL_handle;
buffer1Length = buffer2Length = buffer3Length = 0;
if (count > 0)
{
numBuffers++;
buffer1 = &pRpcMessage[0];
buffer1Length = lengths[0];
totalDataBytes += lengths[0] + 4;
}
if (count > 1)
{
numBuffers++;
buffer2 = &pRpcMessage[1];
buffer2Length = lengths[1];
totalDataBytes += lengths[1] + 4;
}
if (count > 2)
{
numBuffers++;
buffer3 = &pRpcMessage[2];
buffer3Length = lengths[2];
totalDataBytes += lengths[2] + 4;
}
length = 28 + totalDataBytes;
s = Stream_New(NULL, length);
if (!s)
{
WLog_ERR(TAG, "Stream_New failed!");
return -1;
}
/* PCHANNEL_CONTEXT_HANDLE_NOSERIALIZE_NR (20 bytes) */
Stream_Write(s, &tsg->ChannelContext.ContextType, 4); /* ContextType (4 bytes) */
Stream_Write(s, tsg->ChannelContext.ContextUuid, 16); /* ContextUuid (16 bytes) */
Stream_Write_UINT32_BE(s, totalDataBytes); /* totalDataBytes (4 bytes) */
Stream_Write_UINT32_BE(s, numBuffers); /* numBuffers (4 bytes) */
if (buffer1Length > 0)
Stream_Write_UINT32_BE(s, buffer1Length); /* buffer1Length (4 bytes) */
if (buffer2Length > 0)
Stream_Write_UINT32_BE(s, buffer2Length); /* buffer2Length (4 bytes) */
if (buffer3Length > 0)
Stream_Write_UINT32_BE(s, buffer3Length); /* buffer3Length (4 bytes) */
if (buffer1Length > 0)
Stream_Write(s, buffer1, buffer1Length); /* buffer1 (variable) */
if (buffer2Length > 0)
Stream_Write(s, buffer2, buffer2Length); /* buffer2 (variable) */
if (buffer3Length > 0)
Stream_Write(s, buffer3, buffer3Length); /* buffer3 (variable) */
if (!rpc_client_write_call(tsg->rpc, s, TsProxySendToServerOpnum))
return -1;
return length;
}
/**
* OpNum = 1
*
* HRESULT TsProxyCreateTunnel(
* [in, ref] PTSG_PACKET tsgPacket,
* [out, ref] PTSG_PACKET* tsgPacketResponse,
* [out] PTUNNEL_CONTEXT_HANDLE_SERIALIZE* tunnelContext,
* [out] unsigned long* tunnelId
* );
*/
static BOOL TsProxyCreateTunnelWriteRequest(rdpTsg* tsg, PTSG_PACKET tsgPacket)
{
BOOL rc = FALSE;
BOOL write = TRUE;
UINT16 opnum = 0;
wStream* s;
rdpRpc* rpc;
if (!tsg || !tsg->rpc)
return FALSE;
rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxyCreateTunnelWriteRequest");
s = Stream_New(NULL, 108);
if (!s)
return FALSE;
switch (tsgPacket->packetId)
{
case TSG_PACKET_TYPE_VERSIONCAPS:
{
PTSG_PACKET_VERSIONCAPS packetVersionCaps = tsgPacket->tsgPacket.packetVersionCaps;
PTSG_CAPABILITY_NAP tsgCapNap = &packetVersionCaps->tsgCaps->tsgPacket.tsgCapNap;
Stream_Write_UINT32(s, tsgPacket->packetId); /* PacketId (4 bytes) */
Stream_Write_UINT32(s, tsgPacket->packetId); /* SwitchValue (4 bytes) */
Stream_Write_UINT32(s, 0x00020000); /* PacketVersionCapsPtr (4 bytes) */
Stream_Write_UINT16(
s, packetVersionCaps->tsgHeader.ComponentId); /* ComponentId (2 bytes) */
Stream_Write_UINT16(s, packetVersionCaps->tsgHeader.PacketId); /* PacketId (2 bytes) */
Stream_Write_UINT32(s, 0x00020004); /* TsgCapsPtr (4 bytes) */
Stream_Write_UINT32(s,
packetVersionCaps->numCapabilities); /* NumCapabilities (4 bytes) */
Stream_Write_UINT16(s, packetVersionCaps->majorVersion); /* MajorVersion (2 bytes) */
Stream_Write_UINT16(s, packetVersionCaps->minorVersion); /* MinorVersion (2 bytes) */
Stream_Write_UINT16(
s,
packetVersionCaps->quarantineCapabilities); /* QuarantineCapabilities (2 bytes) */
/* 4-byte alignment (30 + 2) */
Stream_Write_UINT16(s, 0x0000); /* pad (2 bytes) */
Stream_Write_UINT32(s, packetVersionCaps->numCapabilities); /* MaxCount (4 bytes) */
Stream_Write_UINT32(
s, packetVersionCaps->tsgCaps->capabilityType); /* CapabilityType (4 bytes) */
Stream_Write_UINT32(
s, packetVersionCaps->tsgCaps->capabilityType); /* SwitchValue (4 bytes) */
Stream_Write_UINT32(s, tsgCapNap->capabilities); /* capabilities (4 bytes) */
/**
* The following 60-byte structure is apparently undocumented,
* but parts of it can be matched to known C706 data structures.
*/
/*
* 8-byte constant (8A E3 13 71 02 F4 36 71) also observed here:
* http://lists.samba.org/archive/cifs-protocol/2010-July/001543.html
*/
Stream_Write_UINT8(s, 0x8A);
Stream_Write_UINT8(s, 0xE3);
Stream_Write_UINT8(s, 0x13);
Stream_Write_UINT8(s, 0x71);
Stream_Write_UINT8(s, 0x02);
Stream_Write_UINT8(s, 0xF4);
Stream_Write_UINT8(s, 0x36);
Stream_Write_UINT8(s, 0x71);
Stream_Write_UINT32(s, 0x00040001); /* 1.4 (version?) */
Stream_Write_UINT32(s, 0x00000001); /* 1 (element count?) */
/* p_cont_list_t */
Stream_Write_UINT8(s, 2); /* ncontext_elem */
Stream_Write_UINT8(s, 0x40); /* reserved1 */
Stream_Write_UINT16(s, 0x0028); /* reserved2 */
/* p_syntax_id_t */
Stream_Write(s, &TSGU_UUID, sizeof(p_uuid_t));
Stream_Write_UINT32(s, TSGU_SYNTAX_IF_VERSION);
/* p_syntax_id_t */
Stream_Write(s, &NDR_UUID, sizeof(p_uuid_t));
Stream_Write_UINT32(s, NDR_SYNTAX_IF_VERSION);
opnum = TsProxyCreateTunnelOpnum;
}
break;
case TSG_PACKET_TYPE_REAUTH:
{
PTSG_PACKET_REAUTH packetReauth = tsgPacket->tsgPacket.packetReauth;
PTSG_PACKET_VERSIONCAPS packetVersionCaps =
packetReauth->tsgInitialPacket.packetVersionCaps;
PTSG_CAPABILITY_NAP tsgCapNap = &packetVersionCaps->tsgCaps->tsgPacket.tsgCapNap;
Stream_Write_UINT32(s, tsgPacket->packetId); /* PacketId (4 bytes) */
Stream_Write_UINT32(s, tsgPacket->packetId); /* SwitchValue (4 bytes) */
Stream_Write_UINT32(s, 0x00020000); /* PacketReauthPtr (4 bytes) */
Stream_Write_UINT32(s, 0); /* ??? (4 bytes) */
Stream_Write_UINT64(s, packetReauth->tunnelContext); /* TunnelContext (8 bytes) */
Stream_Write_UINT32(s, TSG_PACKET_TYPE_VERSIONCAPS); /* PacketId (4 bytes) */
Stream_Write_UINT32(s, TSG_PACKET_TYPE_VERSIONCAPS); /* SwitchValue (4 bytes) */
Stream_Write_UINT32(s, 0x00020004); /* PacketVersionCapsPtr (4 bytes) */
Stream_Write_UINT16(
s, packetVersionCaps->tsgHeader.ComponentId); /* ComponentId (2 bytes) */
Stream_Write_UINT16(s, packetVersionCaps->tsgHeader.PacketId); /* PacketId (2 bytes) */
Stream_Write_UINT32(s, 0x00020008); /* TsgCapsPtr (4 bytes) */
Stream_Write_UINT32(s,
packetVersionCaps->numCapabilities); /* NumCapabilities (4 bytes) */
Stream_Write_UINT16(s, packetVersionCaps->majorVersion); /* MajorVersion (2 bytes) */
Stream_Write_UINT16(s, packetVersionCaps->minorVersion); /* MinorVersion (2 bytes) */
Stream_Write_UINT16(
s,
packetVersionCaps->quarantineCapabilities); /* QuarantineCapabilities (2 bytes) */
/* 4-byte alignment (30 + 2) */
Stream_Write_UINT16(s, 0x0000); /* pad (2 bytes) */
Stream_Write_UINT32(s, packetVersionCaps->numCapabilities); /* MaxCount (4 bytes) */
Stream_Write_UINT32(
s, packetVersionCaps->tsgCaps->capabilityType); /* CapabilityType (4 bytes) */
Stream_Write_UINT32(
s, packetVersionCaps->tsgCaps->capabilityType); /* SwitchValue (4 bytes) */
Stream_Write_UINT32(s, tsgCapNap->capabilities); /* capabilities (4 bytes) */
opnum = TsProxyCreateTunnelOpnum;
}
break;
default:
write = FALSE;
break;
}
rc = TRUE;
if (write)
return rpc_client_write_call(rpc, s, opnum);
Stream_Free(s, TRUE);
return rc;
}
static BOOL TsProxyCreateTunnelReadResponse(rdpTsg* tsg, RPC_PDU* pdu,
CONTEXT_HANDLE* tunnelContext, UINT32* tunnelId)
{
BOOL rc = FALSE;
UINT32 count;
UINT32 Pointer;
PTSG_PACKET packet;
UINT32 SwitchValue;
UINT32 MessageSwitchValue = 0;
UINT32 IsMessagePresent;
UINT32 MsgBytes;
PTSG_PACKET_CAPABILITIES tsgCaps = NULL;
PTSG_PACKET_VERSIONCAPS versionCaps = NULL;
PTSG_PACKET_CAPS_RESPONSE packetCapsResponse = NULL;
PTSG_PACKET_QUARENC_RESPONSE packetQuarEncResponse = NULL;
WLog_DBG(TAG, "TsProxyCreateTunnelReadResponse");
if (!pdu)
return FALSE;
packet = (PTSG_PACKET)calloc(1, sizeof(TSG_PACKET));
if (!packet)
return FALSE;
if (Stream_GetRemainingLength(pdu->s) < 12)
goto fail;
Stream_Seek_UINT32(pdu->s); /* PacketPtr (4 bytes) */
Stream_Read_UINT32(pdu->s, packet->packetId); /* PacketId (4 bytes) */
Stream_Read_UINT32(pdu->s, SwitchValue); /* SwitchValue (4 bytes) */
if ((packet->packetId == TSG_PACKET_TYPE_CAPS_RESPONSE) &&
(SwitchValue == TSG_PACKET_TYPE_CAPS_RESPONSE))
{
packetCapsResponse = (PTSG_PACKET_CAPS_RESPONSE)calloc(1, sizeof(TSG_PACKET_CAPS_RESPONSE));
if (!packetCapsResponse)
goto fail;
packet->tsgPacket.packetCapsResponse = packetCapsResponse;
if (Stream_GetRemainingLength(pdu->s) < 32)
goto fail;
Stream_Seek_UINT32(pdu->s); /* PacketQuarResponsePtr (4 bytes) */
Stream_Read_UINT32(pdu->s,
packetCapsResponse->pktQuarEncResponse.flags); /* Flags (4 bytes) */
Stream_Read_UINT32(
pdu->s,
packetCapsResponse->pktQuarEncResponse.certChainLen); /* CertChainLength (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* CertChainDataPtr (4 bytes) */
Stream_Read(pdu->s, &packetCapsResponse->pktQuarEncResponse.nonce,
16); /* Nonce (16 bytes) */
Stream_Read_UINT32(pdu->s, Pointer); /* VersionCapsPtr (4 bytes) */
if ((Pointer == 0x0002000C) || (Pointer == 0x00020008))
{
if (Stream_GetRemainingLength(pdu->s) < 16)
goto fail;
Stream_Seek_UINT32(pdu->s); /* MsgId (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* MsgType (4 bytes) */
Stream_Read_UINT32(pdu->s, IsMessagePresent); /* IsMessagePresent (4 bytes) */
Stream_Read_UINT32(pdu->s, MessageSwitchValue); /* MessageSwitchValue (4 bytes) */
}
if (packetCapsResponse->pktQuarEncResponse.certChainLen > 0)
{
if (Stream_GetRemainingLength(pdu->s) < 16)
goto fail;
Stream_Read_UINT32(pdu->s, Pointer); /* MsgPtr (4 bytes): 0x00020014 */
Stream_Seek_UINT32(pdu->s); /* MaxCount (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* Offset (4 bytes) */
Stream_Read_UINT32(pdu->s, count); /* ActualCount (4 bytes) */
/*
* CertChainData is a wide character string, and the count is
* given in characters excluding the null terminator, therefore:
* size = (count * 2)
*/
if (!Stream_SafeSeek(pdu->s, count * 2)) /* CertChainData */
goto fail;
/* 4-byte alignment */
if (!tsg_stream_align(pdu->s, 4))
goto fail;
}
else
{
if (Stream_GetRemainingLength(pdu->s) < 4)
goto fail;
Stream_Read_UINT32(pdu->s, Pointer); /* Ptr (4 bytes) */
}
versionCaps = (PTSG_PACKET_VERSIONCAPS)calloc(1, sizeof(TSG_PACKET_VERSIONCAPS));
if (!versionCaps)
goto fail;
packetCapsResponse->pktQuarEncResponse.versionCaps = versionCaps;
if (Stream_GetRemainingLength(pdu->s) < 18)
goto fail;
Stream_Read_UINT16(pdu->s, versionCaps->tsgHeader.ComponentId); /* ComponentId (2 bytes) */
Stream_Read_UINT16(pdu->s, versionCaps->tsgHeader.PacketId); /* PacketId (2 bytes) */
if (versionCaps->tsgHeader.ComponentId != TS_GATEWAY_TRANSPORT)
{
WLog_ERR(TAG, "Unexpected ComponentId: 0x%04" PRIX16 ", Expected TS_GATEWAY_TRANSPORT",
versionCaps->tsgHeader.ComponentId);
goto fail;
}
Stream_Read_UINT32(pdu->s, Pointer); /* TsgCapsPtr (4 bytes) */
Stream_Read_UINT32(pdu->s, versionCaps->numCapabilities); /* NumCapabilities (4 bytes) */
Stream_Read_UINT16(pdu->s, versionCaps->majorVersion); /* MajorVersion (2 bytes) */
Stream_Read_UINT16(pdu->s, versionCaps->minorVersion); /* MinorVersion (2 bytes) */
Stream_Read_UINT16(
pdu->s, versionCaps->quarantineCapabilities); /* QuarantineCapabilities (2 bytes) */
/* 4-byte alignment */
if (!tsg_stream_align(pdu->s, 4))
goto fail;
tsgCaps = (PTSG_PACKET_CAPABILITIES)calloc(1, sizeof(TSG_PACKET_CAPABILITIES));
if (!tsgCaps)
goto fail;
versionCaps->tsgCaps = tsgCaps;
if (Stream_GetRemainingLength(pdu->s) < 16)
goto fail;
Stream_Seek_UINT32(pdu->s); /* MaxCount (4 bytes) */
Stream_Read_UINT32(pdu->s, tsgCaps->capabilityType); /* CapabilityType (4 bytes) */
Stream_Read_UINT32(pdu->s, SwitchValue); /* SwitchValue (4 bytes) */
if ((SwitchValue != TSG_CAPABILITY_TYPE_NAP) ||
(tsgCaps->capabilityType != TSG_CAPABILITY_TYPE_NAP))
{
WLog_ERR(TAG,
"Unexpected CapabilityType: 0x%08" PRIX32 ", Expected TSG_CAPABILITY_TYPE_NAP",
tsgCaps->capabilityType);
goto fail;
}
Stream_Read_UINT32(pdu->s,
tsgCaps->tsgPacket.tsgCapNap.capabilities); /* Capabilities (4 bytes) */
switch (MessageSwitchValue)
{
case TSG_ASYNC_MESSAGE_CONSENT_MESSAGE:
case TSG_ASYNC_MESSAGE_SERVICE_MESSAGE:
if (Stream_GetRemainingLength(pdu->s) < 16)
goto fail;
Stream_Seek_UINT32(pdu->s); /* IsDisplayMandatory (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* IsConsent Mandatory (4 bytes) */
Stream_Read_UINT32(pdu->s, MsgBytes);
Stream_Read_UINT32(pdu->s, Pointer);
if (Pointer)
{
if (Stream_GetRemainingLength(pdu->s) < 12)
goto fail;
Stream_Seek_UINT32(pdu->s); /* MaxCount (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* Offset (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* Length (4 bytes) */
}
if (MsgBytes > TSG_MESSAGING_MAX_MESSAGE_LENGTH)
{
WLog_ERR(TAG, "Out of Spec Message Length %" PRIu32 "", MsgBytes);
goto fail;
}
if (!Stream_SafeSeek(pdu->s, MsgBytes))
goto fail;
break;
case TSG_ASYNC_MESSAGE_REAUTH:
{
if (!tsg_stream_align(pdu->s, 8))
goto fail;
if (Stream_GetRemainingLength(pdu->s) < 8)
goto fail;
Stream_Seek_UINT64(pdu->s); /* TunnelContext (8 bytes) */
}
break;
default:
WLog_ERR(TAG, "Unexpected Message Type: 0x%" PRIX32 "", MessageSwitchValue);
goto fail;
}
if (!tsg_stream_align(pdu->s, 4))
goto fail;
/* TunnelContext (20 bytes) */
if (Stream_GetRemainingLength(pdu->s) < 24)
goto fail;
Stream_Read_UINT32(pdu->s, tunnelContext->ContextType); /* ContextType (4 bytes) */
Stream_Read(pdu->s, tunnelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
Stream_Read_UINT32(pdu->s, *tunnelId); /* TunnelId (4 bytes) */
/* ReturnValue (4 bytes) */
}
else if ((packet->packetId == TSG_PACKET_TYPE_QUARENC_RESPONSE) &&
(SwitchValue == TSG_PACKET_TYPE_QUARENC_RESPONSE))
{
packetQuarEncResponse =
(PTSG_PACKET_QUARENC_RESPONSE)calloc(1, sizeof(TSG_PACKET_QUARENC_RESPONSE));
if (!packetQuarEncResponse)
goto fail;
packet->tsgPacket.packetQuarEncResponse = packetQuarEncResponse;
if (Stream_GetRemainingLength(pdu->s) < 32)
goto fail;
Stream_Seek_UINT32(pdu->s); /* PacketQuarResponsePtr (4 bytes) */
Stream_Read_UINT32(pdu->s, packetQuarEncResponse->flags); /* Flags (4 bytes) */
Stream_Read_UINT32(pdu->s,
packetQuarEncResponse->certChainLen); /* CertChainLength (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* CertChainDataPtr (4 bytes) */
Stream_Read(pdu->s, &packetQuarEncResponse->nonce, 16); /* Nonce (16 bytes) */
if (packetQuarEncResponse->certChainLen > 0)
{
if (Stream_GetRemainingLength(pdu->s) < 16)
goto fail;
Stream_Read_UINT32(pdu->s, Pointer); /* Ptr (4 bytes): 0x0002000C */
Stream_Seek_UINT32(pdu->s); /* MaxCount (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* Offset (4 bytes) */
Stream_Read_UINT32(pdu->s, count); /* ActualCount (4 bytes) */
/*
* CertChainData is a wide character string, and the count is
* given in characters excluding the null terminator, therefore:
* size = (count * 2)
*/
if (!Stream_SafeSeek(pdu->s, count * 2)) /* CertChainData */
goto fail;
/* 4-byte alignment */
if (!tsg_stream_align(pdu->s, 4))
goto fail;
}
else
{
if (Stream_GetRemainingLength(pdu->s) < 4)
goto fail;
Stream_Read_UINT32(pdu->s, Pointer); /* Ptr (4 bytes): 0x00020008 */
}
versionCaps = (PTSG_PACKET_VERSIONCAPS)calloc(1, sizeof(TSG_PACKET_VERSIONCAPS));
if (!versionCaps)
goto fail;
packetQuarEncResponse->versionCaps = versionCaps;
if (Stream_GetRemainingLength(pdu->s) < 18)
goto fail;
Stream_Read_UINT16(pdu->s, versionCaps->tsgHeader.ComponentId); /* ComponentId (2 bytes) */
Stream_Read_UINT16(pdu->s, versionCaps->tsgHeader.PacketId); /* PacketId (2 bytes) */
if (versionCaps->tsgHeader.ComponentId != TS_GATEWAY_TRANSPORT)
{
WLog_ERR(TAG, "Unexpected ComponentId: 0x%04" PRIX16 ", Expected TS_GATEWAY_TRANSPORT",
versionCaps->tsgHeader.ComponentId);
goto fail;
}
Stream_Read_UINT32(pdu->s, Pointer); /* TsgCapsPtr (4 bytes) */
Stream_Read_UINT32(pdu->s, versionCaps->numCapabilities); /* NumCapabilities (4 bytes) */
Stream_Read_UINT16(pdu->s, versionCaps->majorVersion); /* MajorVersion (2 bytes) */
Stream_Read_UINT16(pdu->s, versionCaps->minorVersion); /* MinorVersion (2 bytes) */
Stream_Read_UINT16(
pdu->s, versionCaps->quarantineCapabilities); /* QuarantineCapabilities (2 bytes) */
/* 4-byte alignment */
if (!tsg_stream_align(pdu->s, 4))
goto fail;
if (Stream_GetRemainingLength(pdu->s) < 36)
goto fail;
/* Not sure exactly what this is */
Stream_Seek_UINT32(pdu->s); /* 0x00000001 (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* 0x00000001 (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* 0x00000001 (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* 0x00000002 (4 bytes) */
/* TunnelContext (20 bytes) */
Stream_Read_UINT32(pdu->s, tunnelContext->ContextType); /* ContextType (4 bytes) */
Stream_Read(pdu->s, tunnelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
}
else
{
WLog_ERR(TAG,
"Unexpected PacketId: 0x%08" PRIX32 ", Expected TSG_PACKET_TYPE_CAPS_RESPONSE "
"or TSG_PACKET_TYPE_QUARENC_RESPONSE",
packet->packetId);
goto fail;
}
rc = TRUE;
fail:
free(packetQuarEncResponse);
free(packetCapsResponse);
free(versionCaps);
free(tsgCaps);
free(packet);
return rc;
}
/**
* OpNum = 2
*
* HRESULT TsProxyAuthorizeTunnel(
* [in] PTUNNEL_CONTEXT_HANDLE_NOSERIALIZE tunnelContext,
* [in, ref] PTSG_PACKET tsgPacket,
* [out, ref] PTSG_PACKET* tsgPacketResponse
* );
*
*/
static BOOL TsProxyAuthorizeTunnelWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* tunnelContext)
{
UINT32 pad;
wStream* s;
size_t count;
UINT32 offset;
rdpRpc* rpc;
if (!tsg || !tsg->rpc || !tunnelContext || !tsg->MachineName)
return FALSE;
count = _wcslen(tsg->MachineName) + 1;
rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxyAuthorizeTunnelWriteRequest");
s = Stream_New(NULL, 1024 + count * 2);
if (!s)
return FALSE;
/* TunnelContext (20 bytes) */
Stream_Write_UINT32(s, tunnelContext->ContextType); /* ContextType (4 bytes) */
Stream_Write(s, &tunnelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
/* 4-byte alignment */
Stream_Write_UINT32(s, TSG_PACKET_TYPE_QUARREQUEST); /* PacketId (4 bytes) */
Stream_Write_UINT32(s, TSG_PACKET_TYPE_QUARREQUEST); /* SwitchValue (4 bytes) */
Stream_Write_UINT32(s, 0x00020000); /* PacketQuarRequestPtr (4 bytes) */
Stream_Write_UINT32(s, 0x00000000); /* Flags (4 bytes) */
Stream_Write_UINT32(s, 0x00020004); /* MachineNamePtr (4 bytes) */
Stream_Write_UINT32(s, count); /* NameLength (4 bytes) */
Stream_Write_UINT32(s, 0x00020008); /* DataPtr (4 bytes) */
Stream_Write_UINT32(s, 0); /* DataLength (4 bytes) */
/* MachineName */
Stream_Write_UINT32(s, count); /* MaxCount (4 bytes) */
Stream_Write_UINT32(s, 0); /* Offset (4 bytes) */
Stream_Write_UINT32(s, count); /* ActualCount (4 bytes) */
Stream_Write_UTF16_String(s, tsg->MachineName, count); /* Array */
/* 4-byte alignment */
offset = Stream_GetPosition(s);
pad = rpc_offset_align(&offset, 4);
Stream_Zero(s, pad);
Stream_Write_UINT32(s, 0x00000000); /* MaxCount (4 bytes) */
Stream_SealLength(s);
return rpc_client_write_call(rpc, s, TsProxyAuthorizeTunnelOpnum);
}
static BOOL TsProxyAuthorizeTunnelReadResponse(rdpTsg* tsg, RPC_PDU* pdu)
{
BOOL rc = FALSE;
UINT32 Pointer;
UINT32 SizeValue;
UINT32 SwitchValue;
UINT32 idleTimeout;
PTSG_PACKET packet = NULL;
PTSG_PACKET_RESPONSE packetResponse = NULL;
WLog_DBG(TAG, "TsProxyAuthorizeTunnelReadResponse");
if (!pdu)
return FALSE;
packet = (PTSG_PACKET)calloc(1, sizeof(TSG_PACKET));
if (!packet)
return FALSE;
if (Stream_GetRemainingLength(pdu->s) < 68)
goto fail;
Stream_Seek_UINT32(pdu->s); /* PacketPtr (4 bytes) */
Stream_Read_UINT32(pdu->s, packet->packetId); /* PacketId (4 bytes) */
Stream_Read_UINT32(pdu->s, SwitchValue); /* SwitchValue (4 bytes) */
if (packet->packetId == E_PROXY_NAP_ACCESSDENIED)
{
WLog_ERR(TAG, "status: E_PROXY_NAP_ACCESSDENIED (0x%08X)", E_PROXY_NAP_ACCESSDENIED);
WLog_ERR(TAG, "Ensure that the Gateway Connection Authorization Policy is correct");
goto fail;
}
if ((packet->packetId != TSG_PACKET_TYPE_RESPONSE) || (SwitchValue != TSG_PACKET_TYPE_RESPONSE))
{
WLog_ERR(TAG, "Unexpected PacketId: 0x%08" PRIX32 ", Expected TSG_PACKET_TYPE_RESPONSE",
packet->packetId);
goto fail;
}
packetResponse = (PTSG_PACKET_RESPONSE)calloc(1, sizeof(TSG_PACKET_RESPONSE));
if (!packetResponse)
goto fail;
packet->tsgPacket.packetResponse = packetResponse;
Stream_Read_UINT32(pdu->s, Pointer); /* PacketResponsePtr (4 bytes) */
Stream_Read_UINT32(pdu->s, packetResponse->flags); /* Flags (4 bytes) */
if (packetResponse->flags != TSG_PACKET_TYPE_QUARREQUEST)
{
WLog_ERR(TAG,
"Unexpected Packet Response Flags: 0x%08" PRIX32
", Expected TSG_PACKET_TYPE_QUARREQUEST",
packetResponse->flags);
goto fail;
}
Stream_Seek_UINT32(pdu->s); /* Reserved (4 bytes) */
Stream_Read_UINT32(pdu->s, Pointer); /* ResponseDataPtr (4 bytes) */
Stream_Read_UINT32(pdu->s, packetResponse->responseDataLen); /* ResponseDataLength (4 bytes) */
Stream_Read_UINT32(pdu->s, packetResponse->redirectionFlags
.enableAllRedirections); /* EnableAllRedirections (4 bytes) */
Stream_Read_UINT32(pdu->s, packetResponse->redirectionFlags
.disableAllRedirections); /* DisableAllRedirections (4 bytes) */
Stream_Read_UINT32(pdu->s,
packetResponse->redirectionFlags
.driveRedirectionDisabled); /* DriveRedirectionDisabled (4 bytes) */
Stream_Read_UINT32(pdu->s,
packetResponse->redirectionFlags
.printerRedirectionDisabled); /* PrinterRedirectionDisabled (4 bytes) */
Stream_Read_UINT32(pdu->s,
packetResponse->redirectionFlags
.portRedirectionDisabled); /* PortRedirectionDisabled (4 bytes) */
Stream_Read_UINT32(pdu->s, packetResponse->redirectionFlags.reserved); /* Reserved (4 bytes) */
Stream_Read_UINT32(
pdu->s, packetResponse->redirectionFlags
.clipboardRedirectionDisabled); /* ClipboardRedirectionDisabled (4 bytes) */
Stream_Read_UINT32(pdu->s, packetResponse->redirectionFlags
.pnpRedirectionDisabled); /* PnpRedirectionDisabled (4 bytes) */
Stream_Read_UINT32(pdu->s, SizeValue); /* (4 bytes) */
if (SizeValue != packetResponse->responseDataLen)
{
WLog_ERR(TAG, "Unexpected size value: %" PRIu32 ", expected: %" PRIu32 "", SizeValue,
packetResponse->responseDataLen);
goto fail;
}
if (Stream_GetRemainingLength(pdu->s) < SizeValue)
goto fail;
if (SizeValue == 4)
Stream_Read_UINT32(pdu->s, idleTimeout);
else
Stream_Seek(pdu->s, SizeValue); /* ResponseData */
rc = TRUE;
fail:
free(packetResponse);
free(packet);
return rc;
}
/**
* OpNum = 3
*
* HRESULT TsProxyMakeTunnelCall(
* [in] PTUNNEL_CONTEXT_HANDLE_NOSERIALIZE tunnelContext,
* [in] unsigned long procId,
* [in, ref] PTSG_PACKET tsgPacket,
* [out, ref] PTSG_PACKET* tsgPacketResponse
* );
*/
static BOOL TsProxyMakeTunnelCallWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* tunnelContext,
UINT32 procId)
{
wStream* s;
rdpRpc* rpc;
if (!tsg || !tsg->rpc || !tunnelContext)
return FALSE;
rpc = tsg->rpc;
WLog_DBG(TAG, "TsProxyMakeTunnelCallWriteRequest");
s = Stream_New(NULL, 40);
if (!s)
return FALSE;
/* TunnelContext (20 bytes) */
Stream_Write_UINT32(s, tunnelContext->ContextType); /* ContextType (4 bytes) */
Stream_Write(s, tunnelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
Stream_Write_UINT32(s, procId); /* ProcId (4 bytes) */
/* 4-byte alignment */
Stream_Write_UINT32(s, TSG_PACKET_TYPE_MSGREQUEST_PACKET); /* PacketId (4 bytes) */
Stream_Write_UINT32(s, TSG_PACKET_TYPE_MSGREQUEST_PACKET); /* SwitchValue (4 bytes) */
Stream_Write_UINT32(s, 0x00020000); /* PacketMsgRequestPtr (4 bytes) */
Stream_Write_UINT32(s, 0x00000001); /* MaxMessagesPerBatch (4 bytes) */
return rpc_client_write_call(rpc, s, TsProxyMakeTunnelCallOpnum);
}
static BOOL TsProxyReadPacketSTringMessage(rdpTsg* tsg, wStream* s, TSG_PACKET_STRING_MESSAGE* msg)
{
UINT32 Pointer, ActualCount, MaxCount;
if (!tsg || !s || !msg)
return FALSE;
if (Stream_GetRemainingLength(s) < 32)
return FALSE;
Stream_Read_UINT32(s, Pointer); /* ConsentMessagePtr (4 bytes) */
Stream_Read_INT32(s, msg->isDisplayMandatory); /* IsDisplayMandatory (4 bytes) */
Stream_Read_INT32(s, msg->isConsentMandatory); /* IsConsentMandatory (4 bytes) */
Stream_Read_UINT32(s, msg->msgBytes); /* MsgBytes (4 bytes) */
Stream_Read_UINT32(s, Pointer); /* MsgPtr (4 bytes) */
Stream_Read_UINT32(s, MaxCount); /* MaxCount (4 bytes) */
Stream_Seek_UINT32(s); /* Offset (4 bytes) */
Stream_Read_UINT32(s, ActualCount); /* ActualCount (4 bytes) */
if (msg->msgBytes < ActualCount * 2)
return FALSE;
if (Stream_GetRemainingLength(s) < msg->msgBytes)
return FALSE;
msg->msgBuffer = (WCHAR*)Stream_Pointer(s);
Stream_Seek(s, msg->msgBytes);
return TRUE;
}
static BOOL TsProxyMakeTunnelCallReadResponse(rdpTsg* tsg, RPC_PDU* pdu)
{
BOOL rc = FALSE;
UINT32 Pointer;
UINT32 SwitchValue;
TSG_PACKET packet;
char* messageText = NULL;
TSG_PACKET_MSG_RESPONSE packetMsgResponse = { 0 };
TSG_PACKET_STRING_MESSAGE packetStringMessage = { 0 };
TSG_PACKET_REAUTH_MESSAGE packetReauthMessage = { 0 };
WLog_DBG(TAG, "TsProxyMakeTunnelCallReadResponse");
/* This is an asynchronous response */
if (!pdu)
return FALSE;
if (Stream_GetRemainingLength(pdu->s) < 28)
goto fail;
Stream_Seek_UINT32(pdu->s); /* PacketPtr (4 bytes) */
Stream_Read_UINT32(pdu->s, packet.packetId); /* PacketId (4 bytes) */
Stream_Read_UINT32(pdu->s, SwitchValue); /* SwitchValue (4 bytes) */
if ((packet.packetId != TSG_PACKET_TYPE_MESSAGE_PACKET) ||
(SwitchValue != TSG_PACKET_TYPE_MESSAGE_PACKET))
{
WLog_ERR(TAG,
"Unexpected PacketId: 0x%08" PRIX32 ", Expected TSG_PACKET_TYPE_MESSAGE_PACKET",
packet.packetId);
goto fail;
}
Stream_Read_UINT32(pdu->s, Pointer); /* PacketMsgResponsePtr (4 bytes) */
Stream_Read_UINT32(pdu->s, packetMsgResponse.msgID); /* MsgId (4 bytes) */
Stream_Read_UINT32(pdu->s, packetMsgResponse.msgType); /* MsgType (4 bytes) */
Stream_Read_INT32(pdu->s, packetMsgResponse.isMsgPresent); /* IsMsgPresent (4 bytes) */
/* 2.2.9.2.1.9 TSG_PACKET_MSG_RESPONSE: Ignore empty message body. */
if (!packetMsgResponse.isMsgPresent)
{
rc = TRUE;
goto fail;
}
Stream_Read_UINT32(pdu->s, SwitchValue); /* SwitchValue (4 bytes) */
switch (SwitchValue)
{
case TSG_ASYNC_MESSAGE_CONSENT_MESSAGE:
if (!TsProxyReadPacketSTringMessage(tsg, pdu->s, &packetStringMessage))
goto fail;
ConvertFromUnicode(CP_UTF8, 0, packetStringMessage.msgBuffer,
packetStringMessage.msgBytes / 2, &messageText, 0, NULL, NULL);
WLog_INFO(TAG, "Consent Message: %s", messageText);
free(messageText);
if (tsg->rpc && tsg->rpc->context && tsg->rpc->context->instance)
{
rc = IFCALLRESULT(TRUE, tsg->rpc->context->instance->PresentGatewayMessage,
tsg->rpc->context->instance, SwitchValue,
packetStringMessage.isDisplayMandatory != 0,
packetStringMessage.isConsentMandatory != 0,
packetStringMessage.msgBytes, packetStringMessage.msgBuffer);
}
break;
case TSG_ASYNC_MESSAGE_SERVICE_MESSAGE:
if (!TsProxyReadPacketSTringMessage(tsg, pdu->s, &packetStringMessage))
goto fail;
ConvertFromUnicode(CP_UTF8, 0, packetStringMessage.msgBuffer,
packetStringMessage.msgBytes / 2, &messageText, 0, NULL, NULL);
WLog_INFO(TAG, "Service Message: %s", messageText);
free(messageText);
if (tsg->rpc && tsg->rpc->context && tsg->rpc->context->instance)
{
rc = IFCALLRESULT(TRUE, tsg->rpc->context->instance->PresentGatewayMessage,
tsg->rpc->context->instance, SwitchValue,
packetStringMessage.isDisplayMandatory != 0,
packetStringMessage.isConsentMandatory != 0,
packetStringMessage.msgBytes, packetStringMessage.msgBuffer);
}
break;
case TSG_ASYNC_MESSAGE_REAUTH:
if (Stream_GetRemainingLength(pdu->s) < 20)
goto fail;
Stream_Read_UINT32(pdu->s, Pointer); /* ReauthMessagePtr (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* alignment pad (4 bytes) */
Stream_Read_UINT64(pdu->s,
packetReauthMessage.tunnelContext); /* TunnelContext (8 bytes) */
Stream_Seek_UINT32(pdu->s); /* ReturnValue (4 bytes) */
tsg->ReauthTunnelContext = packetReauthMessage.tunnelContext;
break;
default:
WLog_ERR(TAG, "unexpected message type: %" PRIu32 "", SwitchValue);
goto fail;
}
rc = TRUE;
fail:
return rc;
}
/**
* OpNum = 4
*
* HRESULT TsProxyCreateChannel(
* [in] PTUNNEL_CONTEXT_HANDLE_NOSERIALIZE tunnelContext,
* [in, ref] PTSENDPOINTINFO tsEndPointInfo,
* [out] PCHANNEL_CONTEXT_HANDLE_SERIALIZE* channelContext,
* [out] unsigned long* channelId
* );
*/
static BOOL TsProxyCreateChannelWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* tunnelContext)
{
size_t count;
wStream* s;
rdpRpc* rpc;
WLog_DBG(TAG, "TsProxyCreateChannelWriteRequest");
if (!tsg || !tsg->rpc || !tunnelContext || !tsg->Hostname)
return FALSE;
rpc = tsg->rpc;
count = _wcslen(tsg->Hostname) + 1;
s = Stream_New(NULL, 60 + count * 2);
if (!s)
return FALSE;
/* TunnelContext (20 bytes) */
Stream_Write_UINT32(s, tunnelContext->ContextType); /* ContextType (4 bytes) */
Stream_Write(s, tunnelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
/* TSENDPOINTINFO */
Stream_Write_UINT32(s, 0x00020000); /* ResourceNamePtr (4 bytes) */
Stream_Write_UINT32(s, 0x00000001); /* NumResourceNames (4 bytes) */
Stream_Write_UINT32(s, 0x00000000); /* AlternateResourceNamesPtr (4 bytes) */
Stream_Write_UINT16(s, 0x0000); /* NumAlternateResourceNames (2 bytes) */
Stream_Write_UINT16(s, 0x0000); /* Pad (2 bytes) */
/* Port (4 bytes) */
Stream_Write_UINT16(s, 0x0003); /* ProtocolId (RDP = 3) (2 bytes) */
Stream_Write_UINT16(s, tsg->Port); /* PortNumber (0xD3D = 3389) (2 bytes) */
Stream_Write_UINT32(s, 0x00000001); /* NumResourceNames (4 bytes) */
Stream_Write_UINT32(s, 0x00020004); /* ResourceNamePtr (4 bytes) */
Stream_Write_UINT32(s, count); /* MaxCount (4 bytes) */
Stream_Write_UINT32(s, 0); /* Offset (4 bytes) */
Stream_Write_UINT32(s, count); /* ActualCount (4 bytes) */
Stream_Write_UTF16_String(s, tsg->Hostname, count); /* Array */
return rpc_client_write_call(rpc, s, TsProxyCreateChannelOpnum);
}
static BOOL TsProxyCreateChannelReadResponse(rdpTsg* tsg, RPC_PDU* pdu,
CONTEXT_HANDLE* channelContext, UINT32* channelId)
{
BOOL rc = FALSE;
WLog_DBG(TAG, "TsProxyCreateChannelReadResponse");
if (!pdu)
return FALSE;
if (Stream_GetRemainingLength(pdu->s) < 28)
goto fail;
/* ChannelContext (20 bytes) */
Stream_Read_UINT32(pdu->s, channelContext->ContextType); /* ContextType (4 bytes) */
Stream_Read(pdu->s, channelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
Stream_Read_UINT32(pdu->s, *channelId); /* ChannelId (4 bytes) */
Stream_Seek_UINT32(pdu->s); /* ReturnValue (4 bytes) */
rc = TRUE;
fail:
return rc;
}
/**
* HRESULT TsProxyCloseChannel(
* [in, out] PCHANNEL_CONTEXT_HANDLE_NOSERIALIZE* context
* );
*/
static BOOL TsProxyCloseChannelWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* context)
{
wStream* s;
rdpRpc* rpc;
WLog_DBG(TAG, "TsProxyCloseChannelWriteRequest");
if (!tsg || !tsg->rpc || !context)
return FALSE;
rpc = tsg->rpc;
s = Stream_New(NULL, 20);
if (!s)
return FALSE;
/* ChannelContext (20 bytes) */
Stream_Write_UINT32(s, context->ContextType); /* ContextType (4 bytes) */
Stream_Write(s, context->ContextUuid, 16); /* ContextUuid (16 bytes) */
return rpc_client_write_call(rpc, s, TsProxyCloseChannelOpnum);
}
static BOOL TsProxyCloseChannelReadResponse(rdpTsg* tsg, RPC_PDU* pdu, CONTEXT_HANDLE* context)
{
BOOL rc = FALSE;
WLog_DBG(TAG, "TsProxyCloseChannelReadResponse");
if (!pdu)
return FALSE;
if (Stream_GetRemainingLength(pdu->s) < 24)
goto fail;
/* ChannelContext (20 bytes) */
Stream_Read_UINT32(pdu->s, context->ContextType); /* ContextType (4 bytes) */
Stream_Read(pdu->s, context->ContextUuid, 16); /* ContextUuid (16 bytes) */
Stream_Seek_UINT32(pdu->s); /* ReturnValue (4 bytes) */
rc = TRUE;
fail:
return rc;
}
/**
* HRESULT TsProxyCloseTunnel(
* [in, out] PTUNNEL_CONTEXT_HANDLE_SERIALIZE* context
* );
*/
static BOOL TsProxyCloseTunnelWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* context)
{
wStream* s;
rdpRpc* rpc;
WLog_DBG(TAG, "TsProxyCloseTunnelWriteRequest");
if (!tsg || !tsg->rpc || !context)
return FALSE;
rpc = tsg->rpc;
s = Stream_New(NULL, 20);
if (!s)
return FALSE;
/* TunnelContext (20 bytes) */
Stream_Write_UINT32(s, context->ContextType); /* ContextType (4 bytes) */
Stream_Write(s, context->ContextUuid, 16); /* ContextUuid (16 bytes) */
return rpc_client_write_call(rpc, s, TsProxyCloseTunnelOpnum);
}
static BOOL TsProxyCloseTunnelReadResponse(rdpTsg* tsg, RPC_PDU* pdu, CONTEXT_HANDLE* context)
{
BOOL rc = FALSE;
WLog_DBG(TAG, "TsProxyCloseTunnelReadResponse");
if (!pdu || !context)
return FALSE;
if (Stream_GetRemainingLength(pdu->s) < 24)
goto fail;
/* TunnelContext (20 bytes) */
Stream_Read_UINT32(pdu->s, context->ContextType); /* ContextType (4 bytes) */
Stream_Read(pdu->s, context->ContextUuid, 16); /* ContextUuid (16 bytes) */
Stream_Seek_UINT32(pdu->s); /* ReturnValue (4 bytes) */
rc = TRUE;
fail:
return rc;
}
/**
* OpNum = 8
*
* DWORD TsProxySetupReceivePipe(
* [in, max_is(32767)] byte pRpcMessage[]
* );
*/
static BOOL TsProxySetupReceivePipeWriteRequest(rdpTsg* tsg, CONTEXT_HANDLE* channelContext)
{
wStream* s;
rdpRpc* rpc;
WLog_DBG(TAG, "TsProxySetupReceivePipeWriteRequest");
if (!tsg || !tsg->rpc || !channelContext)
return FALSE;
rpc = tsg->rpc;
s = Stream_New(NULL, 20);
if (!s)
return FALSE;
/* ChannelContext (20 bytes) */
Stream_Write_UINT32(s, channelContext->ContextType); /* ContextType (4 bytes) */
Stream_Write(s, channelContext->ContextUuid, 16); /* ContextUuid (16 bytes) */
return rpc_client_write_call(rpc, s, TsProxySetupReceivePipeOpnum);
}
static BOOL tsg_transition_to_state(rdpTsg* tsg, TSG_STATE state)
{
const char* str = "TSG_STATE_UNKNOWN";
switch (state)
{
case TSG_STATE_INITIAL:
str = "TSG_STATE_INITIAL";
break;
case TSG_STATE_CONNECTED:
str = "TSG_STATE_CONNECTED";
break;
case TSG_STATE_AUTHORIZED:
str = "TSG_STATE_AUTHORIZED";
break;
case TSG_STATE_CHANNEL_CREATED:
str = "TSG_STATE_CHANNEL_CREATED";
break;
case TSG_STATE_PIPE_CREATED:
str = "TSG_STATE_PIPE_CREATED";
break;
case TSG_STATE_TUNNEL_CLOSE_PENDING:
str = "TSG_STATE_TUNNEL_CLOSE_PENDING";
break;
case TSG_STATE_CHANNEL_CLOSE_PENDING:
str = "TSG_STATE_CHANNEL_CLOSE_PENDING";
break;
case TSG_STATE_FINAL:
str = "TSG_STATE_FINAL";
break;
}
WLog_DBG(TAG, "%s", str);
return tsg_set_state(tsg, state);
}
BOOL tsg_proxy_begin(rdpTsg* tsg)
{
TSG_PACKET tsgPacket;
PTSG_CAPABILITY_NAP tsgCapNap;
PTSG_PACKET_VERSIONCAPS packetVersionCaps;
if (!tsg)
return FALSE;
packetVersionCaps = &tsg->packetVersionCaps;
packetVersionCaps->tsgCaps = &tsg->tsgCaps;
tsgCapNap = &tsg->tsgCaps.tsgPacket.tsgCapNap;
tsgPacket.packetId = TSG_PACKET_TYPE_VERSIONCAPS;
tsgPacket.tsgPacket.packetVersionCaps = packetVersionCaps;
packetVersionCaps->tsgHeader.ComponentId = TS_GATEWAY_TRANSPORT;
packetVersionCaps->tsgHeader.PacketId = TSG_PACKET_TYPE_VERSIONCAPS;
packetVersionCaps->numCapabilities = 1;
packetVersionCaps->majorVersion = 1;
packetVersionCaps->minorVersion = 1;
packetVersionCaps->quarantineCapabilities = 0;
packetVersionCaps->tsgCaps->capabilityType = TSG_CAPABILITY_TYPE_NAP;
/*
* Using reduced capabilities appears to trigger
* TSG_PACKET_TYPE_QUARENC_RESPONSE instead of TSG_PACKET_TYPE_CAPS_RESPONSE
*
* However, reduced capabilities may break connectivity with servers enforcing features, such as
* "Only allow connections from Remote Desktop Services clients that support RD Gateway
* messaging"
*/
tsgCapNap->capabilities = TSG_NAP_CAPABILITY_QUAR_SOH | TSG_NAP_CAPABILITY_IDLE_TIMEOUT |
TSG_MESSAGING_CAP_CONSENT_SIGN | TSG_MESSAGING_CAP_SERVICE_MSG |
TSG_MESSAGING_CAP_REAUTH;
if (!TsProxyCreateTunnelWriteRequest(tsg, &tsgPacket))
{
WLog_ERR(TAG, "TsProxyCreateTunnel failure");
tsg_transition_to_state(tsg, TSG_STATE_FINAL);
return FALSE;
}
return tsg_transition_to_state(tsg, TSG_STATE_INITIAL);
}
static BOOL tsg_proxy_reauth(rdpTsg* tsg)
{
TSG_PACKET tsgPacket;
PTSG_PACKET_REAUTH packetReauth;
PTSG_PACKET_VERSIONCAPS packetVersionCaps;
if (!tsg)
return FALSE;
tsg->reauthSequence = TRUE;
packetReauth = &tsg->packetReauth;
packetVersionCaps = &tsg->packetVersionCaps;
if (!packetReauth || !packetVersionCaps)
return FALSE;
tsgPacket.packetId = TSG_PACKET_TYPE_REAUTH;
tsgPacket.tsgPacket.packetReauth = &tsg->packetReauth;
packetReauth->tunnelContext = tsg->ReauthTunnelContext;
packetReauth->packetId = TSG_PACKET_TYPE_VERSIONCAPS;
packetReauth->tsgInitialPacket.packetVersionCaps = packetVersionCaps;
if (!TsProxyCreateTunnelWriteRequest(tsg, &tsgPacket))
{
WLog_ERR(TAG, "TsProxyCreateTunnel failure");
tsg_transition_to_state(tsg, TSG_STATE_FINAL);
return FALSE;
}
if (!TsProxyMakeTunnelCallWriteRequest(tsg, &tsg->TunnelContext,
TSG_TUNNEL_CALL_ASYNC_MSG_REQUEST))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCall failure");
tsg_transition_to_state(tsg, TSG_STATE_FINAL);
return FALSE;
}
return tsg_transition_to_state(tsg, TSG_STATE_INITIAL);
}
BOOL tsg_recv_pdu(rdpTsg* tsg, RPC_PDU* pdu)
{
BOOL rc = FALSE;
RpcClientCall* call;
rdpRpc* rpc;
if (!tsg || !tsg->rpc || !pdu)
return FALSE;
rpc = tsg->rpc;
Stream_SealLength(pdu->s);
Stream_SetPosition(pdu->s, 0);
if (!(pdu->Flags & RPC_PDU_FLAG_STUB))
{
if (!Stream_SafeSeek(pdu->s, 24))
return FALSE;
}
switch (tsg->state)
{
case TSG_STATE_INITIAL:
{
CONTEXT_HANDLE* TunnelContext;
TunnelContext = (tsg->reauthSequence) ? &tsg->NewTunnelContext : &tsg->TunnelContext;
if (!TsProxyCreateTunnelReadResponse(tsg, pdu, TunnelContext, &tsg->TunnelId))
{
WLog_ERR(TAG, "TsProxyCreateTunnelReadResponse failure");
return FALSE;
}
if (!tsg_transition_to_state(tsg, TSG_STATE_CONNECTED))
return FALSE;
if (!TsProxyAuthorizeTunnelWriteRequest(tsg, TunnelContext))
{
WLog_ERR(TAG, "TsProxyAuthorizeTunnel failure");
return FALSE;
}
rc = TRUE;
}
break;
case TSG_STATE_CONNECTED:
{
CONTEXT_HANDLE* TunnelContext;
TunnelContext = (tsg->reauthSequence) ? &tsg->NewTunnelContext : &tsg->TunnelContext;
if (!TsProxyAuthorizeTunnelReadResponse(tsg, pdu))
{
WLog_ERR(TAG, "TsProxyAuthorizeTunnelReadResponse failure");
return FALSE;
}
if (!tsg_transition_to_state(tsg, TSG_STATE_AUTHORIZED))
return FALSE;
if (!tsg->reauthSequence)
{
if (!TsProxyMakeTunnelCallWriteRequest(tsg, TunnelContext,
TSG_TUNNEL_CALL_ASYNC_MSG_REQUEST))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCall failure");
return FALSE;
}
}
if (!TsProxyCreateChannelWriteRequest(tsg, TunnelContext))
{
WLog_ERR(TAG, "TsProxyCreateChannel failure");
return FALSE;
}
rc = TRUE;
}
break;
case TSG_STATE_AUTHORIZED:
call = rpc_client_call_find_by_id(rpc->client, pdu->CallId);
if (!call)
return FALSE;
if (call->OpNum == TsProxyMakeTunnelCallOpnum)
{
if (!TsProxyMakeTunnelCallReadResponse(tsg, pdu))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCallReadResponse failure");
return FALSE;
}
rc = TRUE;
}
else if (call->OpNum == TsProxyCreateChannelOpnum)
{
CONTEXT_HANDLE ChannelContext;
if (!TsProxyCreateChannelReadResponse(tsg, pdu, &ChannelContext, &tsg->ChannelId))
{
WLog_ERR(TAG, "TsProxyCreateChannelReadResponse failure");
return FALSE;
}
if (!tsg->reauthSequence)
CopyMemory(&tsg->ChannelContext, &ChannelContext, sizeof(CONTEXT_HANDLE));
else
CopyMemory(&tsg->NewChannelContext, &ChannelContext, sizeof(CONTEXT_HANDLE));
if (!tsg_transition_to_state(tsg, TSG_STATE_CHANNEL_CREATED))
return FALSE;
if (!tsg->reauthSequence)
{
if (!TsProxySetupReceivePipeWriteRequest(tsg, &tsg->ChannelContext))
{
WLog_ERR(TAG, "TsProxySetupReceivePipe failure");
return FALSE;
}
}
else
{
if (!TsProxyCloseChannelWriteRequest(tsg, &tsg->NewChannelContext))
{
WLog_ERR(TAG, "TsProxyCloseChannelWriteRequest failure");
return FALSE;
}
if (!TsProxyCloseTunnelWriteRequest(tsg, &tsg->NewTunnelContext))
{
WLog_ERR(TAG, "TsProxyCloseTunnelWriteRequest failure");
return FALSE;
}
}
rc = tsg_transition_to_state(tsg, TSG_STATE_PIPE_CREATED);
tsg->reauthSequence = FALSE;
}
else
{
WLog_ERR(TAG, "TSG_STATE_AUTHORIZED unexpected OpNum: %" PRIu32 "\n", call->OpNum);
}
break;
case TSG_STATE_CHANNEL_CREATED:
break;
case TSG_STATE_PIPE_CREATED:
call = rpc_client_call_find_by_id(rpc->client, pdu->CallId);
if (!call)
return FALSE;
if (call->OpNum == TsProxyMakeTunnelCallOpnum)
{
if (!TsProxyMakeTunnelCallReadResponse(tsg, pdu))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCallReadResponse failure");
return FALSE;
}
rc = TRUE;
if (tsg->ReauthTunnelContext)
rc = tsg_proxy_reauth(tsg);
}
else if (call->OpNum == TsProxyCloseChannelOpnum)
{
CONTEXT_HANDLE ChannelContext;
if (!TsProxyCloseChannelReadResponse(tsg, pdu, &ChannelContext))
{
WLog_ERR(TAG, "TsProxyCloseChannelReadResponse failure");
return FALSE;
}
rc = TRUE;
}
else if (call->OpNum == TsProxyCloseTunnelOpnum)
{
CONTEXT_HANDLE TunnelContext;
if (!TsProxyCloseTunnelReadResponse(tsg, pdu, &TunnelContext))
{
WLog_ERR(TAG, "TsProxyCloseTunnelReadResponse failure");
return FALSE;
}
rc = TRUE;
}
break;
case TSG_STATE_TUNNEL_CLOSE_PENDING:
{
CONTEXT_HANDLE ChannelContext;
if (!TsProxyCloseChannelReadResponse(tsg, pdu, &ChannelContext))
{
WLog_ERR(TAG, "TsProxyCloseChannelReadResponse failure");
return FALSE;
}
if (!tsg_transition_to_state(tsg, TSG_STATE_CHANNEL_CLOSE_PENDING))
return FALSE;
if (!TsProxyCloseChannelWriteRequest(tsg, NULL))
{
WLog_ERR(TAG, "TsProxyCloseChannelWriteRequest failure");
return FALSE;
}
if (!TsProxyMakeTunnelCallWriteRequest(tsg, &tsg->TunnelContext,
TSG_TUNNEL_CANCEL_ASYNC_MSG_REQUEST))
{
WLog_ERR(TAG, "TsProxyMakeTunnelCall failure");
return FALSE;
}
rc = TRUE;
}
break;
case TSG_STATE_CHANNEL_CLOSE_PENDING:
{
CONTEXT_HANDLE TunnelContext;
if (!TsProxyCloseTunnelReadResponse(tsg, pdu, &TunnelContext))
{
WLog_ERR(TAG, "TsProxyCloseTunnelReadResponse failure");
return FALSE;
}
rc = tsg_transition_to_state(tsg, TSG_STATE_FINAL);
}
break;
case TSG_STATE_FINAL:
break;
}
return rc;
}
BOOL tsg_check_event_handles(rdpTsg* tsg)
{
if (rpc_client_in_channel_recv(tsg->rpc) < 0)
return FALSE;
if (rpc_client_out_channel_recv(tsg->rpc) < 0)
return FALSE;
return TRUE;
}
DWORD tsg_get_event_handles(rdpTsg* tsg, HANDLE* events, DWORD count)
{
UINT32 nCount = 0;
rdpRpc* rpc = tsg->rpc;
RpcVirtualConnection* connection = rpc->VirtualConnection;
if (events && (nCount < count))
{
events[nCount] = rpc->client->PipeEvent;
nCount++;
}
else
return 0;
if (connection->DefaultInChannel && connection->DefaultInChannel->common.tls)
{
if (events && (nCount < count))
{
BIO_get_event(connection->DefaultInChannel->common.tls->bio, &events[nCount]);
nCount++;
}
else
return 0;
}
if (connection->NonDefaultInChannel && connection->NonDefaultInChannel->common.tls)
{
if (events && (nCount < count))
{
BIO_get_event(connection->NonDefaultInChannel->common.tls->bio, &events[nCount]);
nCount++;
}
else
return 0;
}
if (connection->DefaultOutChannel && connection->DefaultOutChannel->common.tls)
{
if (events && (nCount < count))
{
BIO_get_event(connection->DefaultOutChannel->common.tls->bio, &events[nCount]);
nCount++;
}
else
return 0;
}
if (connection->NonDefaultOutChannel && connection->NonDefaultOutChannel->common.tls)
{
if (events && (nCount < count))
{
BIO_get_event(connection->NonDefaultOutChannel->common.tls->bio, &events[nCount]);
nCount++;
}
else
return 0;
}
return nCount;
}
static BOOL tsg_set_hostname(rdpTsg* tsg, const char* hostname)
{
free(tsg->Hostname);
tsg->Hostname = NULL;
ConvertToUnicode(CP_UTF8, 0, hostname, -1, &tsg->Hostname, 0);
return TRUE;
}
static BOOL tsg_set_machine_name(rdpTsg* tsg, const char* machineName)
{
free(tsg->MachineName);
tsg->MachineName = NULL;
ConvertToUnicode(CP_UTF8, 0, machineName, -1, &tsg->MachineName, 0);
return TRUE;
}
BOOL tsg_connect(rdpTsg* tsg, const char* hostname, UINT16 port, int timeout)
{
DWORD nCount;
HANDLE events[64];
rdpRpc* rpc = tsg->rpc;
rdpSettings* settings = rpc->settings;
rdpTransport* transport = rpc->transport;
tsg->Port = port;
tsg->transport = transport;
if (!settings->GatewayPort)
settings->GatewayPort = 443;
if (!tsg_set_hostname(tsg, hostname))
return FALSE;
if (!tsg_set_machine_name(tsg, settings->ComputerName))
return FALSE;
if (!rpc_connect(rpc, timeout))
{
WLog_ERR(TAG, "rpc_connect error!");
return FALSE;
}
nCount = tsg_get_event_handles(tsg, events, 64);
if (nCount == 0)
return FALSE;
while (tsg->state != TSG_STATE_PIPE_CREATED)
{
WaitForMultipleObjects(nCount, events, FALSE, 250);
if (!tsg_check_event_handles(tsg))
{
WLog_ERR(TAG, "tsg_check failure");
transport->layer = TRANSPORT_LAYER_CLOSED;
return FALSE;
}
}
WLog_INFO(TAG, "TS Gateway Connection Success");
tsg->bio = BIO_new(BIO_s_tsg());
if (!tsg->bio)
return FALSE;
BIO_set_data(tsg->bio, (void*)tsg);
return TRUE;
}
BOOL tsg_disconnect(rdpTsg* tsg)
{
/**
* Gateway Shutdown Phase
*
* Client Server
* | |
* |-------------TsProxyCloseChannel Request---------->|
* | |
* |<-------TsProxySetupReceivePipe Final Response-----|
* |<-----------TsProxyCloseChannel Response-----------|
* | |
* |----TsProxyMakeTunnelCall Request (cancel async)-->|
* | |
* |<---TsProxyMakeTunnelCall Response (call async)----|
* |<---TsProxyMakeTunnelCall Response (cancel async)--|
* | |
* |--------------TsProxyCloseTunnel Request---------->|
* |<-------------TsProxyCloseTunnel Response----------|
* | |
*/
if (!tsg)
return FALSE;
if (tsg->state != TSG_STATE_TUNNEL_CLOSE_PENDING)
{
if (!TsProxyCloseChannelWriteRequest(tsg, &tsg->ChannelContext))
return FALSE;
return tsg_transition_to_state(tsg, TSG_STATE_CHANNEL_CLOSE_PENDING);
}
return TRUE;
}
/**
* @brief
*
* @param[in] tsg
* @param[in] data
* @param[in] length
* @return < 0 on error; 0 if not enough data is available (non blocking mode); > 0 bytes to read
*/
static int tsg_read(rdpTsg* tsg, BYTE* data, UINT32 length)
{
rdpRpc* rpc;
int status = 0;
if (!tsg || !data)
return -1;
rpc = tsg->rpc;
if (rpc->transport->layer == TRANSPORT_LAYER_CLOSED)
{
WLog_ERR(TAG, "tsg_read error: connection lost");
return -1;
}
do
{
status = rpc_client_receive_pipe_read(rpc->client, data, (size_t)length);
if (status < 0)
return -1;
if (!status && !rpc->transport->blocking)
return 0;
if (rpc->transport->layer == TRANSPORT_LAYER_CLOSED)
{
WLog_ERR(TAG, "tsg_read error: connection lost");
return -1;
}
if (status > 0)
break;
if (rpc->transport->blocking)
{
while (WaitForSingleObject(rpc->client->PipeEvent, 0) != WAIT_OBJECT_0)
{
if (!tsg_check_event_handles(tsg))
return -1;
WaitForSingleObject(rpc->client->PipeEvent, 100);
}
}
} while (rpc->transport->blocking);
return status;
}
static int tsg_write(rdpTsg* tsg, const BYTE* data, UINT32 length)
{
int status;
if (!tsg || !data || !tsg->rpc || !tsg->rpc->transport)
return -1;
if (tsg->rpc->transport->layer == TRANSPORT_LAYER_CLOSED)
{
WLog_ERR(TAG, "error, connection lost");
return -1;
}
status = TsProxySendToServer((handle_t)tsg, data, 1, &length);
if (status < 0)
return -1;
return length;
}
rdpTsg* tsg_new(rdpTransport* transport)
{
rdpTsg* tsg;
tsg = (rdpTsg*)calloc(1, sizeof(rdpTsg));
if (!tsg)
return NULL;
tsg->transport = transport;
tsg->settings = transport->settings;
tsg->rpc = rpc_new(tsg->transport);
if (!tsg->rpc)
goto out_free;
return tsg;
out_free:
free(tsg);
return NULL;
}
void tsg_free(rdpTsg* tsg)
{
if (tsg)
{
rpc_free(tsg->rpc);
free(tsg->Hostname);
free(tsg->MachineName);
free(tsg);
}
}
static int transport_bio_tsg_write(BIO* bio, const char* buf, int num)
{
int status;
rdpTsg* tsg = (rdpTsg*)BIO_get_data(bio);
BIO_clear_flags(bio, BIO_FLAGS_WRITE);
status = tsg_write(tsg, (BYTE*)buf, num);
if (status < 0)
{
BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY);
return -1;
}
else if (status == 0)
{
BIO_set_flags(bio, BIO_FLAGS_WRITE);
WSASetLastError(WSAEWOULDBLOCK);
}
else
{
BIO_set_flags(bio, BIO_FLAGS_WRITE);
}
return status >= 0 ? status : -1;
}
static int transport_bio_tsg_read(BIO* bio, char* buf, int size)
{
int status;
rdpTsg* tsg = (rdpTsg*)BIO_get_data(bio);
if (!tsg || (size < 0))
{
BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY);
return -1;
}
BIO_clear_flags(bio, BIO_FLAGS_READ);
status = tsg_read(tsg, (BYTE*)buf, size);
if (status < 0)
{
BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY);
return -1;
}
else if (status == 0)
{
BIO_set_flags(bio, BIO_FLAGS_READ);
WSASetLastError(WSAEWOULDBLOCK);
}
else
{
BIO_set_flags(bio, BIO_FLAGS_READ);
}
return status > 0 ? status : -1;
}
static int transport_bio_tsg_puts(BIO* bio, const char* str)
{
return 1;
}
static int transport_bio_tsg_gets(BIO* bio, char* str, int size)
{
return 1;
}
static long transport_bio_tsg_ctrl(BIO* bio, int cmd, long arg1, void* arg2)
{
int status = -1;
rdpTsg* tsg = (rdpTsg*)BIO_get_data(bio);
RpcVirtualConnection* connection = tsg->rpc->VirtualConnection;
RpcInChannel* inChannel = connection->DefaultInChannel;
RpcOutChannel* outChannel = connection->DefaultOutChannel;
switch (cmd)
{
case BIO_CTRL_FLUSH:
(void)BIO_flush(inChannel->common.tls->bio);
(void)BIO_flush(outChannel->common.tls->bio);
status = 1;
break;
case BIO_C_GET_EVENT:
if (arg2)
{
*((HANDLE*)arg2) = tsg->rpc->client->PipeEvent;
status = 1;
}
break;
case BIO_C_SET_NONBLOCK:
status = 1;
break;
case BIO_C_READ_BLOCKED:
{
BIO* bio = outChannel->common.bio;
status = BIO_read_blocked(bio);
}
break;
case BIO_C_WRITE_BLOCKED:
{
BIO* bio = inChannel->common.bio;
status = BIO_write_blocked(bio);
}
break;
case BIO_C_WAIT_READ:
{
int timeout = (int)arg1;
BIO* bio = outChannel->common.bio;
if (BIO_read_blocked(bio))
return BIO_wait_read(bio, timeout);
else if (BIO_write_blocked(bio))
return BIO_wait_write(bio, timeout);
else
status = 1;
}
break;
case BIO_C_WAIT_WRITE:
{
int timeout = (int)arg1;
BIO* bio = inChannel->common.bio;
if (BIO_write_blocked(bio))
status = BIO_wait_write(bio, timeout);
else if (BIO_read_blocked(bio))
status = BIO_wait_read(bio, timeout);
else
status = 1;
}
break;
default:
break;
}
return status;
}
static int transport_bio_tsg_new(BIO* bio)
{
BIO_set_init(bio, 1);
BIO_set_flags(bio, BIO_FLAGS_SHOULD_RETRY);
return 1;
}
static int transport_bio_tsg_free(BIO* bio)
{
return 1;
}
BIO_METHOD* BIO_s_tsg(void)
{
static BIO_METHOD* bio_methods = NULL;
if (bio_methods == NULL)
{
if (!(bio_methods = BIO_meth_new(BIO_TYPE_TSG, "TSGateway")))
return NULL;
BIO_meth_set_write(bio_methods, transport_bio_tsg_write);
BIO_meth_set_read(bio_methods, transport_bio_tsg_read);
BIO_meth_set_puts(bio_methods, transport_bio_tsg_puts);
BIO_meth_set_gets(bio_methods, transport_bio_tsg_gets);
BIO_meth_set_ctrl(bio_methods, transport_bio_tsg_ctrl);
BIO_meth_set_create(bio_methods, transport_bio_tsg_new);
BIO_meth_set_destroy(bio_methods, transport_bio_tsg_free);
}
return bio_methods;
}
TSG_STATE tsg_get_state(rdpTsg* tsg)
{
if (!tsg)
return TSG_STATE_INITIAL;
return tsg->state;
}
BIO* tsg_get_bio(rdpTsg* tsg)
{
if (!tsg)
return NULL;
return tsg->bio;
}
BOOL tsg_set_state(rdpTsg* tsg, TSG_STATE state)
{
if (!tsg)
return FALSE;
tsg->state = state;
return TRUE;
}