930 lines
22 KiB
C
930 lines
22 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* T.125 Multipoint Communication Service (MCS) Protocol
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*
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* Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <winpr/crt.h>
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#include "gcc.h"
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#include "mcs.h"
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#include "tpdu.h"
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#include "tpkt.h"
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/**
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* T.125 MCS is defined in:
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*
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* http://www.itu.int/rec/T-REC-T.125-199802-I/
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* ITU-T T.125 Multipoint Communication Service Protocol Specification
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*/
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/**
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* Connect-Initial ::= [APPLICATION 101] IMPLICIT SEQUENCE
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* {
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* callingDomainSelector OCTET_STRING,
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* calledDomainSelector OCTET_STRING,
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* upwardFlag BOOLEAN,
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* targetParameters DomainParameters,
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* minimumParameters DomainParameters,
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* maximumParameters DomainParameters,
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* userData OCTET_STRING
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* }
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*
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* DomainParameters ::= SEQUENCE
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* {
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* maxChannelIds INTEGER (0..MAX),
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* maxUserIds INTEGER (0..MAX),
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* maxTokenIds INTEGER (0..MAX),
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* numPriorities INTEGER (0..MAX),
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* minThroughput INTEGER (0..MAX),
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* maxHeight INTEGER (0..MAX),
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* maxMCSPDUsize INTEGER (0..MAX),
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* protocolVersion INTEGER (0..MAX)
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* }
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*
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* Connect-Response ::= [APPLICATION 102] IMPLICIT SEQUENCE
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* {
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* result Result,
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* calledConnectId INTEGER (0..MAX),
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* domainParameters DomainParameters,
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* userData OCTET_STRING
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* }
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*
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* Result ::= ENUMERATED
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* {
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* rt-successful (0),
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* rt-domain-merging (1),
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* rt-domain-not-hierarchical (2),
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* rt-no-such-channel (3),
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* rt-no-such-domain (4),
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* rt-no-such-user (5),
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* rt-not-admitted (6),
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* rt-other-user-id (7),
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* rt-parameters-unacceptable (8),
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* rt-token-not-available (9),
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* rt-token-not-possessed (10),
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* rt-too-many-channels (11),
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* rt-too-many-tokens (12),
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* rt-too-many-users (13),
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* rt-unspecified-failure (14),
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* rt-user-rejected (15)
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* }
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*
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* ErectDomainRequest ::= [APPLICATION 1] IMPLICIT SEQUENCE
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* {
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* subHeight INTEGER (0..MAX),
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* subInterval INTEGER (0..MAX)
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* }
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*
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* AttachUserRequest ::= [APPPLICATION 10] IMPLICIT SEQUENCE
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* {
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* }
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*
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* AttachUserConfirm ::= [APPLICATION 11] IMPLICIT SEQUENCE
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* {
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* result Result,
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* initiator UserId OPTIONAL
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* }
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*
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* ChannelJoinRequest ::= [APPLICATION 14] IMPLICIT SEQUENCE
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* {
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* initiator UserId,
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* channelId ChannelId
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* }
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*
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* ChannelJoinConfirm ::= [APPLICATION 15] IMPLICIT SEQUENCE
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* {
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* result Result,
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* initiator UserId,
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* requested ChannelId,
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* channelId ChannelId OPTIONAL
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* }
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*
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* SendDataRequest ::= [APPLICATION 25] IMPLICIT SEQUENCE
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* {
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* initiator UserId,
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* channelId ChannelId,
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* dataPriority DataPriority,
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* segmentation Segmentation,
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* userData OCTET_STRING
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* }
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*
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* DataPriority ::= CHOICE
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* {
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* top NULL,
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* high NULL,
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* medium NULL,
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* low NULL,
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* ...
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* }
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*
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* Segmentation ::= BIT_STRING
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* {
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* begin (0),
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* end (1)
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* } (SIZE(2))
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*
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* SendDataIndication ::= SEQUENCE
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* {
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* initiator UserId,
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* channelId ChannelId,
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* reliability BOOLEAN,
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* domainReferenceID INTEGER (0..65535) OPTIONAL,
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* dataPriority DataPriority,
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* segmentation Segmentation,
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* userData OCTET_STRING,
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* totalDataSize INTEGER OPTIONAL,
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* nonStandard SEQUENCE OF NonStandardParameter OPTIONAL,
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* ...
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* }
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*
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*/
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static const BYTE callingDomainSelector[1] = "\x01";
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static const BYTE calledDomainSelector[1] = "\x01";
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/*
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static const char* const mcs_result_enumerated[] =
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{
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"rt-successful",
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"rt-domain-merging",
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"rt-domain-not-hierarchical",
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"rt-no-such-channel",
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"rt-no-such-domain",
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"rt-no-such-user",
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"rt-not-admitted",
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"rt-other-user-id",
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"rt-parameters-unacceptable",
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"rt-token-not-available",
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"rt-token-not-possessed",
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"rt-too-many-channels",
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"rt-too-many-tokens",
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"rt-too-many-users",
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"rt-unspecified-failure",
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"rt-user-rejected"
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};
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*/
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/**
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* Read a DomainMCSPDU header.
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* @param s stream
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* @param domainMCSPDU DomainMCSPDU type
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* @param length TPKT length
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* @return
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*/
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BOOL mcs_read_domain_mcspdu_header(wStream* s, enum DomainMCSPDU* domainMCSPDU, UINT16* length)
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{
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UINT16 li;
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BYTE choice;
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enum DomainMCSPDU MCSPDU;
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*length = tpkt_read_header(s);
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if (!tpdu_read_data(s, &li))
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return FALSE;
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MCSPDU = *domainMCSPDU;
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if (!per_read_choice(s, &choice))
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return FALSE;
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*domainMCSPDU = (choice >> 2);
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if (*domainMCSPDU != MCSPDU)
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return FALSE;
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return TRUE;
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}
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/**
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* Write a DomainMCSPDU header.
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* @param s stream
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* @param domainMCSPDU DomainMCSPDU type
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* @param length TPKT length
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*/
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void mcs_write_domain_mcspdu_header(wStream* s, enum DomainMCSPDU domainMCSPDU, UINT16 length, BYTE options)
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{
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tpkt_write_header(s, length);
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tpdu_write_data(s);
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per_write_choice(s, (domainMCSPDU << 2) | options);
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}
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/**
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* Initialize MCS Domain Parameters.
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* @param domainParameters domain parameters
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* @param maxChannelIds max channel ids
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* @param maxUserIds max user ids
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* @param maxTokenIds max token ids
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* @param maxMCSPDUsize max MCS PDU size
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*/
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static void mcs_init_domain_parameters(DomainParameters* domainParameters,
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UINT32 maxChannelIds, UINT32 maxUserIds, UINT32 maxTokenIds, UINT32 maxMCSPDUsize)
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{
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domainParameters->maxChannelIds = maxChannelIds;
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domainParameters->maxUserIds = maxUserIds;
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domainParameters->maxTokenIds = maxTokenIds;
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domainParameters->maxMCSPDUsize = maxMCSPDUsize;
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domainParameters->numPriorities = 1;
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domainParameters->minThroughput = 0;
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domainParameters->maxHeight = 1;
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domainParameters->protocolVersion = 2;
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}
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/**
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* Read MCS Domain Parameters.
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* @param s stream
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* @param domainParameters domain parameters
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*/
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BOOL mcs_read_domain_parameters(wStream* s, DomainParameters* domainParameters)
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{
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int length;
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return
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ber_read_sequence_tag(s, &length) &&
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ber_read_integer(s, &(domainParameters->maxChannelIds)) &&
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ber_read_integer(s, &(domainParameters->maxUserIds)) &&
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ber_read_integer(s, &(domainParameters->maxTokenIds)) &&
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ber_read_integer(s, &(domainParameters->numPriorities)) &&
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ber_read_integer(s, &(domainParameters->minThroughput)) &&
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ber_read_integer(s, &(domainParameters->maxHeight)) &&
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ber_read_integer(s, &(domainParameters->maxMCSPDUsize)) &&
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ber_read_integer(s, &(domainParameters->protocolVersion));
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}
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/**
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* Write MCS Domain Parameters.
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* @param s stream
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* @param domainParameters domain parameters
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*/
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void mcs_write_domain_parameters(wStream* s, DomainParameters* domainParameters)
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{
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int length;
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wStream* tmps;
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tmps = Stream_New(NULL, Stream_Capacity(s));
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ber_write_integer(tmps, domainParameters->maxChannelIds);
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ber_write_integer(tmps, domainParameters->maxUserIds);
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ber_write_integer(tmps, domainParameters->maxTokenIds);
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ber_write_integer(tmps, domainParameters->numPriorities);
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ber_write_integer(tmps, domainParameters->minThroughput);
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ber_write_integer(tmps, domainParameters->maxHeight);
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ber_write_integer(tmps, domainParameters->maxMCSPDUsize);
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ber_write_integer(tmps, domainParameters->protocolVersion);
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length = Stream_GetPosition(tmps);
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ber_write_sequence_tag(s, length);
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Stream_Write(s, Stream_Buffer(tmps), length);
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Stream_Free(tmps, TRUE);
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}
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/**
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* Print MCS Domain Parameters.
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* @param domainParameters domain parameters
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*/
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void mcs_print_domain_parameters(DomainParameters* domainParameters)
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{
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fprintf(stderr, "DomainParameters {\n");
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fprintf(stderr, "\tmaxChannelIds:%d\n", domainParameters->maxChannelIds);
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fprintf(stderr, "\tmaxUserIds:%d\n", domainParameters->maxUserIds);
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fprintf(stderr, "\tmaxTokenIds:%d\n", domainParameters->maxTokenIds);
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fprintf(stderr, "\tnumPriorities:%d\n", domainParameters->numPriorities);
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fprintf(stderr, "\tminThroughput:%d\n", domainParameters->minThroughput);
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fprintf(stderr, "\tmaxHeight:%d\n", domainParameters->maxHeight);
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fprintf(stderr, "\tmaxMCSPDUsize:%d\n", domainParameters->maxMCSPDUsize);
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fprintf(stderr, "\tprotocolVersion:%d\n", domainParameters->protocolVersion);
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fprintf(stderr, "}\n");
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}
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/**
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* Read an MCS Connect Initial PDU.\n
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* @msdn{cc240508}
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* @param mcs MCS module
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* @param s stream
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*/
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BOOL mcs_recv_connect_initial(rdpMcs* mcs, wStream* s)
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{
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UINT16 li;
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int length;
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BOOL upwardFlag;
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tpkt_read_header(s);
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if (!tpdu_read_data(s, &li))
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return FALSE;
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if (!ber_read_application_tag(s, MCS_TYPE_CONNECT_INITIAL, &length))
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return FALSE;
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/* callingDomainSelector (OCTET_STRING) */
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if (!ber_read_octet_string_tag(s, &length) || Stream_GetRemainingLength(s) < length)
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return FALSE;
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Stream_Seek(s, length);
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/* calledDomainSelector (OCTET_STRING) */
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if (!ber_read_octet_string_tag(s, &length) || Stream_GetRemainingLength(s) < length)
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return FALSE;
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Stream_Seek(s, length);
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/* upwardFlag (BOOLEAN) */
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if (!ber_read_BOOL(s, &upwardFlag))
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return FALSE;
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/* targetParameters (DomainParameters) */
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if (!mcs_read_domain_parameters(s, &mcs->targetParameters))
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return FALSE;
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/* minimumParameters (DomainParameters) */
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if (!mcs_read_domain_parameters(s, &mcs->minimumParameters))
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return FALSE;
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/* maximumParameters (DomainParameters) */
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if (!mcs_read_domain_parameters(s, &mcs->maximumParameters))
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return FALSE;
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if (!ber_read_octet_string_tag(s, &length) || Stream_GetRemainingLength(s) < length)
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return FALSE;
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if (!gcc_read_conference_create_request(s, mcs->transport->settings))
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return FALSE;
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return TRUE;
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}
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/**
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* Write an MCS Connect Initial PDU.\n
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* @msdn{cc240508}
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* @param s stream
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* @param mcs MCS module
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* @param user_data GCC Conference Create Request
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*/
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void mcs_write_connect_initial(wStream* s, rdpMcs* mcs, wStream* user_data)
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{
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int length;
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wStream* tmps;
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tmps = Stream_New(NULL, Stream_Capacity(s));
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/* callingDomainSelector (OCTET_STRING) */
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ber_write_octet_string(tmps, callingDomainSelector, sizeof(callingDomainSelector));
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/* calledDomainSelector (OCTET_STRING) */
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ber_write_octet_string(tmps, calledDomainSelector, sizeof(calledDomainSelector));
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/* upwardFlag (BOOLEAN) */
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ber_write_BOOL(tmps, TRUE);
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/* targetParameters (DomainParameters) */
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mcs_write_domain_parameters(tmps, &mcs->targetParameters);
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/* minimumParameters (DomainParameters) */
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mcs_write_domain_parameters(tmps, &mcs->minimumParameters);
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/* maximumParameters (DomainParameters) */
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mcs_write_domain_parameters(tmps, &mcs->maximumParameters);
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/* userData (OCTET_STRING) */
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ber_write_octet_string(tmps, user_data->buffer, Stream_GetPosition(user_data));
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length = Stream_GetPosition(tmps);
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/* Connect-Initial (APPLICATION 101, IMPLICIT SEQUENCE) */
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ber_write_application_tag(s, MCS_TYPE_CONNECT_INITIAL, length);
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Stream_Write(s, Stream_Buffer(tmps), length);
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Stream_Free(tmps, TRUE);
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}
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/**
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* Write an MCS Connect Response PDU.\n
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* @msdn{cc240508}
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* @param s stream
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* @param mcs MCS module
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* @param user_data GCC Conference Create Response
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*/
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void mcs_write_connect_response(wStream* s, rdpMcs* mcs, wStream* user_data)
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{
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int length;
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wStream* tmps;
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tmps = Stream_New(NULL, Stream_Capacity(s));
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ber_write_enumerated(tmps, 0, MCS_Result_enum_length);
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ber_write_integer(tmps, 0); /* calledConnectId */
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mcs->domainParameters = mcs->targetParameters;
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mcs_write_domain_parameters(tmps, &(mcs->domainParameters));
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/* userData (OCTET_STRING) */
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ber_write_octet_string(tmps, user_data->buffer, Stream_GetPosition(user_data));
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length = Stream_GetPosition(tmps);
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ber_write_application_tag(s, MCS_TYPE_CONNECT_RESPONSE, length);
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Stream_Write(s, Stream_Buffer(tmps), length);
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Stream_Free(tmps, TRUE);
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}
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/**
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* Send MCS Connect Initial.\n
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* @msdn{cc240508}
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* @param mcs mcs module
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*/
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BOOL mcs_send_connect_initial(rdpMcs* mcs)
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{
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int status;
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int length;
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wStream* s;
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int bm, em;
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wStream* gcc_CCrq;
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wStream* client_data;
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client_data = Stream_New(NULL, 512);
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gcc_write_client_data_blocks(client_data, mcs->transport->settings);
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gcc_CCrq = Stream_New(NULL, 512);
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gcc_write_conference_create_request(gcc_CCrq, client_data);
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length = Stream_GetPosition(gcc_CCrq) + 7;
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s = Stream_New(NULL, 1024 + length);
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bm = Stream_GetPosition(s);
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Stream_Seek(s, 7);
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mcs_write_connect_initial(s, mcs, gcc_CCrq);
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em = Stream_GetPosition(s);
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length = (em - bm);
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Stream_SetPosition(s, bm);
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tpkt_write_header(s, length);
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tpdu_write_data(s);
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Stream_SetPosition(s, em);
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Stream_SealLength(s);
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status = transport_write(mcs->transport, s);
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Stream_Free(s, TRUE);
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Stream_Free(gcc_CCrq, TRUE);
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Stream_Free(client_data, TRUE);
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return (status < 0 ? FALSE : TRUE);
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}
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/**
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* Read MCS Connect Response.\n
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* @msdn{cc240501}
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* @param mcs mcs module
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*/
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BOOL mcs_recv_connect_response(rdpMcs* mcs, wStream* s)
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{
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int length;
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BYTE result;
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UINT16 li;
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UINT32 calledConnectId;
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tpkt_read_header(s);
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if (!tpdu_read_data(s, &li))
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return FALSE;
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if (!ber_read_application_tag(s, MCS_TYPE_CONNECT_RESPONSE, &length) ||
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!ber_read_enumerated(s, &result, MCS_Result_enum_length) ||
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!ber_read_integer(s, &calledConnectId) ||
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!mcs_read_domain_parameters(s, &(mcs->domainParameters)) ||
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!ber_read_octet_string_tag(s, &length))
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{
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return FALSE;
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}
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if (!gcc_read_conference_create_response(s, mcs->transport->settings))
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{
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fprintf(stderr, "mcs_recv_connect_response: gcc_read_conference_create_response failed\n");
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Send MCS Connect Response.\n
|
|
* @msdn{cc240501}
|
|
* @param mcs mcs module
|
|
*/
|
|
|
|
BOOL mcs_send_connect_response(rdpMcs* mcs)
|
|
{
|
|
int length;
|
|
int status;
|
|
wStream* s;
|
|
int bm, em;
|
|
wStream* gcc_CCrsp;
|
|
wStream* server_data;
|
|
|
|
server_data = Stream_New(NULL, 512);
|
|
gcc_write_server_data_blocks(server_data, mcs->transport->settings);
|
|
|
|
gcc_CCrsp = Stream_New(NULL, 512);
|
|
gcc_write_conference_create_response(gcc_CCrsp, server_data);
|
|
length = Stream_GetPosition(gcc_CCrsp) + 7;
|
|
|
|
s = Stream_New(NULL, length + 1024);
|
|
|
|
bm = Stream_GetPosition(s);
|
|
Stream_Seek(s, 7);
|
|
|
|
mcs_write_connect_response(s, mcs, gcc_CCrsp);
|
|
em = Stream_GetPosition(s);
|
|
length = (em - bm);
|
|
Stream_SetPosition(s, bm);
|
|
|
|
tpkt_write_header(s, length);
|
|
tpdu_write_data(s);
|
|
Stream_SetPosition(s, em);
|
|
Stream_SealLength(s);
|
|
|
|
status = transport_write(mcs->transport, s);
|
|
|
|
Stream_Free(s, TRUE);
|
|
Stream_Free(gcc_CCrsp, TRUE);
|
|
Stream_Free(server_data, TRUE);
|
|
|
|
return (status < 0) ? FALSE : TRUE;
|
|
}
|
|
|
|
/**
|
|
* Read MCS Erect Domain Request.\n
|
|
* @msdn{cc240523}
|
|
* @param mcs
|
|
* @param s stream
|
|
*/
|
|
|
|
BOOL mcs_recv_erect_domain_request(rdpMcs* mcs, wStream* s)
|
|
{
|
|
UINT16 length;
|
|
enum DomainMCSPDU MCSPDU;
|
|
|
|
MCSPDU = DomainMCSPDU_ErectDomainRequest;
|
|
|
|
return mcs_read_domain_mcspdu_header(s, &MCSPDU, &length);
|
|
}
|
|
|
|
/**
|
|
* Send MCS Erect Domain Request.\n
|
|
* @msdn{cc240523}
|
|
* @param mcs
|
|
*/
|
|
|
|
BOOL mcs_send_erect_domain_request(rdpMcs* mcs)
|
|
{
|
|
wStream* s;
|
|
int status;
|
|
UINT16 length = 12;
|
|
|
|
s = Stream_New(NULL, length);
|
|
|
|
mcs_write_domain_mcspdu_header(s, DomainMCSPDU_ErectDomainRequest, length, 0);
|
|
|
|
per_write_integer(s, 0); /* subHeight (INTEGER) */
|
|
per_write_integer(s, 0); /* subInterval (INTEGER) */
|
|
|
|
Stream_SealLength(s);
|
|
|
|
status = transport_write(mcs->transport, s);
|
|
|
|
Stream_Free(s, TRUE);
|
|
|
|
return (status < 0) ? FALSE : TRUE;
|
|
}
|
|
|
|
/**
|
|
* Read MCS Attach User Request.\n
|
|
* @msdn{cc240524}
|
|
* @param mcs mcs module
|
|
* @param s stream
|
|
*/
|
|
|
|
BOOL mcs_recv_attach_user_request(rdpMcs* mcs, wStream* s)
|
|
{
|
|
UINT16 length;
|
|
enum DomainMCSPDU MCSPDU;
|
|
|
|
MCSPDU = DomainMCSPDU_AttachUserRequest;
|
|
|
|
return mcs_read_domain_mcspdu_header(s, &MCSPDU, &length);
|
|
}
|
|
|
|
/**
|
|
* Send MCS Attach User Request.\n
|
|
* @msdn{cc240524}
|
|
* @param mcs mcs module
|
|
*/
|
|
|
|
BOOL mcs_send_attach_user_request(rdpMcs* mcs)
|
|
{
|
|
wStream* s;
|
|
int status;
|
|
UINT16 length = 8;
|
|
|
|
s = Stream_New(NULL, length);
|
|
|
|
mcs_write_domain_mcspdu_header(s, DomainMCSPDU_AttachUserRequest, length, 0);
|
|
|
|
Stream_SealLength(s);
|
|
|
|
status = transport_write(mcs->transport, s);
|
|
|
|
Stream_Free(s, TRUE);
|
|
|
|
return (status < 0) ? FALSE : TRUE;
|
|
}
|
|
|
|
/**
|
|
* Read MCS Attach User Confirm.\n
|
|
* @msdn{cc240525}
|
|
* @param mcs mcs module
|
|
*/
|
|
|
|
BOOL mcs_recv_attach_user_confirm(rdpMcs* mcs, wStream* s)
|
|
{
|
|
UINT16 length;
|
|
BYTE result;
|
|
enum DomainMCSPDU MCSPDU;
|
|
|
|
MCSPDU = DomainMCSPDU_AttachUserConfirm;
|
|
|
|
return
|
|
mcs_read_domain_mcspdu_header(s, &MCSPDU, &length) &&
|
|
per_read_enumerated(s, &result, MCS_Result_enum_length) && /* result */
|
|
per_read_integer16(s, &(mcs->user_id), MCS_BASE_CHANNEL_ID); /* initiator (UserId) */
|
|
}
|
|
|
|
/**
|
|
* Send MCS Attach User Confirm.\n
|
|
* @msdn{cc240525}
|
|
* @param mcs mcs module
|
|
*/
|
|
|
|
BOOL mcs_send_attach_user_confirm(rdpMcs* mcs)
|
|
{
|
|
wStream* s;
|
|
int status;
|
|
UINT16 length = 11;
|
|
|
|
s = Stream_New(NULL, length);
|
|
|
|
mcs_write_domain_mcspdu_header(s, DomainMCSPDU_AttachUserConfirm, length, 2);
|
|
|
|
per_write_enumerated(s, 0, MCS_Result_enum_length); /* result */
|
|
mcs->user_id = MCS_GLOBAL_CHANNEL_ID + 1 + mcs->transport->settings->ChannelCount;
|
|
per_write_integer16(s, mcs->user_id, MCS_BASE_CHANNEL_ID); /* initiator (UserId) */
|
|
|
|
Stream_SealLength(s);
|
|
|
|
status = transport_write(mcs->transport, s);
|
|
|
|
Stream_Free(s, TRUE);
|
|
|
|
return (status < 0) ? FALSE : TRUE;
|
|
}
|
|
|
|
/**
|
|
* Read MCS Channel Join Request.\n
|
|
* @msdn{cc240526}
|
|
* @param mcs mcs module
|
|
* @param s stream
|
|
*/
|
|
|
|
BOOL mcs_recv_channel_join_request(rdpMcs* mcs, wStream* s, UINT16* channel_id)
|
|
{
|
|
UINT16 length;
|
|
enum DomainMCSPDU MCSPDU;
|
|
UINT16 user_id;
|
|
|
|
MCSPDU = DomainMCSPDU_ChannelJoinRequest;
|
|
|
|
return
|
|
mcs_read_domain_mcspdu_header(s, &MCSPDU, &length) &&
|
|
per_read_integer16(s, &user_id, MCS_BASE_CHANNEL_ID) &&
|
|
(user_id == mcs->user_id) &&
|
|
per_read_integer16(s, channel_id, 0);
|
|
}
|
|
|
|
/**
|
|
* Send MCS Channel Join Request.\n
|
|
* @msdn{cc240526}
|
|
* @param mcs mcs module
|
|
* @param channel_id channel id
|
|
*/
|
|
|
|
BOOL mcs_send_channel_join_request(rdpMcs* mcs, UINT16 channel_id)
|
|
{
|
|
wStream* s;
|
|
int status;
|
|
UINT16 length = 12;
|
|
|
|
s = Stream_New(NULL, length);
|
|
|
|
mcs_write_domain_mcspdu_header(s, DomainMCSPDU_ChannelJoinRequest, length, 0);
|
|
|
|
per_write_integer16(s, mcs->user_id, MCS_BASE_CHANNEL_ID);
|
|
per_write_integer16(s, channel_id, 0);
|
|
|
|
Stream_SealLength(s);
|
|
|
|
status = transport_write(mcs->transport, s);
|
|
|
|
Stream_Free(s, TRUE);
|
|
|
|
return (status < 0) ? FALSE : TRUE;
|
|
}
|
|
|
|
/**
|
|
* Read MCS Channel Join Confirm.\n
|
|
* @msdn{cc240527}
|
|
* @param mcs mcs module
|
|
*/
|
|
|
|
BOOL mcs_recv_channel_join_confirm(rdpMcs* mcs, wStream* s, UINT16* channel_id)
|
|
{
|
|
BOOL status;
|
|
UINT16 length;
|
|
BYTE result;
|
|
UINT16 initiator;
|
|
UINT16 requested;
|
|
enum DomainMCSPDU MCSPDU;
|
|
|
|
status = TRUE;
|
|
MCSPDU = DomainMCSPDU_ChannelJoinConfirm;
|
|
|
|
status &= mcs_read_domain_mcspdu_header(s, &MCSPDU, &length);
|
|
status &= per_read_enumerated(s, &result, MCS_Result_enum_length); /* result */
|
|
status &= per_read_integer16(s, &initiator, MCS_BASE_CHANNEL_ID); /* initiator (UserId) */
|
|
status &= per_read_integer16(s, &requested, 0); /* requested (ChannelId) */
|
|
status &= per_read_integer16(s, channel_id, 0); /* channelId */
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* Send MCS Channel Join Confirm.\n
|
|
* @msdn{cc240527}
|
|
* @param mcs mcs module
|
|
*/
|
|
|
|
BOOL mcs_send_channel_join_confirm(rdpMcs* mcs, UINT16 channel_id)
|
|
{
|
|
wStream* s;
|
|
int status;
|
|
UINT16 length = 15;
|
|
|
|
s = Stream_New(NULL, length);
|
|
|
|
mcs_write_domain_mcspdu_header(s, DomainMCSPDU_ChannelJoinConfirm, length, 2);
|
|
|
|
per_write_enumerated(s, 0, MCS_Result_enum_length); /* result */
|
|
per_write_integer16(s, mcs->user_id, MCS_BASE_CHANNEL_ID); /* initiator (UserId) */
|
|
per_write_integer16(s, channel_id, 0); /* requested (ChannelId) */
|
|
per_write_integer16(s, channel_id, 0); /* channelId */
|
|
|
|
Stream_SealLength(s);
|
|
|
|
status = transport_write(mcs->transport, s);
|
|
|
|
Stream_Free(s, TRUE);
|
|
|
|
return (status < 0) ? FALSE : TRUE;
|
|
}
|
|
|
|
/**
|
|
* Receive MCS Disconnect Provider Ultimatum PDU.\n
|
|
* @param mcs mcs module
|
|
*/
|
|
|
|
BOOL mcs_recv_disconnect_provider_ultimatum(rdpMcs* mcs, wStream* s, int* reason)
|
|
{
|
|
BYTE b1, b2;
|
|
|
|
/*
|
|
* http://msdn.microsoft.com/en-us/library/cc240872.aspx:
|
|
*
|
|
* PER encoded (ALIGNED variant of BASIC-PER) PDU contents:
|
|
* 21 80
|
|
*
|
|
* 0x21:
|
|
* 0 - --\
|
|
* 0 - |
|
|
* 1 - | CHOICE: From DomainMCSPDU select disconnectProviderUltimatum (8)
|
|
* 0 - | of type DisconnectProviderUltimatum
|
|
* 0 - |
|
|
* 0 - --/
|
|
* 0 - --\
|
|
* 1 - |
|
|
* | DisconnectProviderUltimatum::reason = rn-user-requested (3)
|
|
* 0x80: |
|
|
* 1 - --/
|
|
* 0 - padding
|
|
* 0 - padding
|
|
* 0 - padding
|
|
* 0 - padding
|
|
* 0 - padding
|
|
* 0 - padding
|
|
* 0 - padding
|
|
*/
|
|
|
|
if (Stream_GetRemainingLength(s) < 1)
|
|
return FALSE;
|
|
|
|
Stream_Rewind_UINT8(s);
|
|
Stream_Read_UINT8(s, b1);
|
|
Stream_Read_UINT8(s, b2);
|
|
|
|
*reason = ((b1 & 0x01) << 1) | (b2 >> 7);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Send MCS Disconnect Provider Ultimatum PDU.\n
|
|
* @param mcs mcs module
|
|
*/
|
|
|
|
BOOL mcs_send_disconnect_provider_ultimatum(rdpMcs* mcs)
|
|
{
|
|
wStream* s;
|
|
int status;
|
|
UINT16 length = 9;
|
|
|
|
s = Stream_New(NULL, length);
|
|
|
|
mcs_write_domain_mcspdu_header(s, DomainMCSPDU_DisconnectProviderUltimatum, length, 1);
|
|
|
|
per_write_enumerated(s, 0, 0); /* reason */
|
|
|
|
status = transport_write(mcs->transport, s);
|
|
|
|
Stream_Free(s, TRUE);
|
|
|
|
return (status < 0) ? FALSE : TRUE;
|
|
}
|
|
|
|
/**
|
|
* Instantiate new MCS module.
|
|
* @param transport transport
|
|
* @return new MCS module
|
|
*/
|
|
|
|
rdpMcs* mcs_new(rdpTransport* transport)
|
|
{
|
|
rdpMcs* mcs;
|
|
|
|
mcs = (rdpMcs*) malloc(sizeof(rdpMcs));
|
|
|
|
if (mcs != NULL)
|
|
{
|
|
ZeroMemory(mcs, sizeof(rdpMcs));
|
|
|
|
mcs->transport = transport;
|
|
mcs_init_domain_parameters(&mcs->targetParameters, 34, 2, 0, 0xFFFF);
|
|
mcs_init_domain_parameters(&mcs->minimumParameters, 1, 1, 1, 0x420);
|
|
mcs_init_domain_parameters(&mcs->maximumParameters, 0xFFFF, 0xFC17, 0xFFFF, 0xFFFF);
|
|
}
|
|
|
|
return mcs;
|
|
}
|
|
|
|
/**
|
|
* Free MCS module.
|
|
* @param mcs MCS module to be freed
|
|
*/
|
|
|
|
void mcs_free(rdpMcs* mcs)
|
|
{
|
|
if (mcs != NULL)
|
|
{
|
|
free(mcs);
|
|
}
|
|
}
|