280 lines
7.8 KiB
C
280 lines
7.8 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Client
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* Connection Sequence
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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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#include "connection.h"
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#include "info.h"
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/**
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* Connection Sequence
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* client server
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* | |
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* |-----------------------X.224 Connection Request PDU--------------------->|
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* |<----------------------X.224 Connection Confirm PDU----------------------|
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* |-------MCS Connect-Initial PDU with GCC Conference Create Request------->|
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* |<-----MCS Connect-Response PDU with GCC Conference Create Response-------|
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* |------------------------MCS Erect Domain Request PDU-------------------->|
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* |------------------------MCS Attach User Request PDU--------------------->|
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* |<-----------------------MCS Attach User Confirm PDU----------------------|
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* |------------------------MCS Channel Join Request PDU-------------------->|
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* |<-----------------------MCS Channel Join Confirm PDU---------------------|
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* |----------------------------Security Exchange PDU----------------------->|
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* |-------------------------------Client Info PDU-------------------------->|
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* |<---------------------License Error PDU - Valid Client-------------------|
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* |<-----------------------------Demand Active PDU--------------------------|
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* |------------------------------Confirm Active PDU------------------------>|
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* |-------------------------------Synchronize PDU-------------------------->|
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* |---------------------------Control PDU - Cooperate---------------------->|
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* |------------------------Control PDU - Request Control------------------->|
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* |--------------------------Persistent Key List PDU(s)-------------------->|
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* |--------------------------------Font List PDU--------------------------->|
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* |<------------------------------Synchronize PDU---------------------------|
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* |<--------------------------Control PDU - Cooperate-----------------------|
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* |<-----------------------Control PDU - Granted Control--------------------|
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* |<-------------------------------Font Map PDU-----------------------------|
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*
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*/
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/**
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* Establish RDP Connection.\n
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* @msdn{cc240452}
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* @param rdp RDP module
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*/
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boolean rdp_client_connect(rdpRdp* rdp)
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{
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boolean ret;
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rdp->settings->autologon = 1;
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nego_init(rdp->nego);
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nego_set_target(rdp->nego, rdp->settings->hostname, rdp->settings->port);
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nego_set_cookie(rdp->nego, rdp->settings->username);
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nego_enable_rdp(rdp->nego, rdp->settings->rdp_security);
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nego_enable_nla(rdp->nego, rdp->settings->nla_security);
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nego_enable_tls(rdp->nego, rdp->settings->tls_security);
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if (nego_connect(rdp->nego) != True)
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{
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printf("Error: protocol security negotiation failure\n");
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return False;
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}
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ret = False;
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if (rdp->nego->selected_protocol & PROTOCOL_NLA)
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ret = transport_connect_nla(rdp->transport);
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else if (rdp->nego->selected_protocol & PROTOCOL_TLS)
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ret = transport_connect_tls(rdp->transport);
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else if (rdp->nego->selected_protocol & PROTOCOL_RDP)
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ret = transport_connect_rdp(rdp->transport);
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if (!ret)
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return False;
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if (mcs_connect(rdp->mcs) != True)
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{
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printf("Error: Multipoint Connection Service (MCS) connection failure\n");
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return False;
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}
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rdp_send_client_info(rdp);
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if (license_connect(rdp->license) != True)
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{
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printf("Error: license connection sequence failure\n");
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return False;
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}
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rdp->licensed = True;
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rdp_client_activate(rdp);
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rdp_set_blocking_mode(rdp, False);
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return True;
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}
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boolean rdp_server_accept_nego(rdpRdp* rdp, STREAM* s)
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{
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boolean ret;
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transport_set_blocking_mode(rdp->transport, True);
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if (!nego_recv_request(rdp->nego, s))
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return False;
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if (rdp->nego->requested_protocols == PROTOCOL_RDP)
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{
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printf("Standard RDP encryption is not supported.\n");
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return False;
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}
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printf("Requested protocols:");
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if ((rdp->nego->requested_protocols | PROTOCOL_TLS))
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{
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printf(" TLS");
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if (rdp->settings->tls_security)
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{
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printf("(Y)");
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rdp->nego->selected_protocol |= PROTOCOL_TLS;
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}
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else
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printf("(n)");
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}
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if ((rdp->nego->requested_protocols | PROTOCOL_NLA))
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{
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printf(" NLA");
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if (rdp->settings->nla_security)
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{
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printf("(Y)");
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rdp->nego->selected_protocol |= PROTOCOL_NLA;
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}
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else
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printf("(n)");
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}
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printf("\n");
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nego_send_negotiation_response(rdp->nego);
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ret = False;
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if (rdp->nego->selected_protocol & PROTOCOL_NLA)
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ret = transport_accept_nla(rdp->transport);
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else if (rdp->nego->selected_protocol & PROTOCOL_TLS)
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ret = transport_accept_tls(rdp->transport);
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else if (rdp->nego->selected_protocol & PROTOCOL_RDP)
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ret = transport_accept_rdp(rdp->transport);
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if (!ret)
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return False;
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transport_set_blocking_mode(rdp->transport, False);
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rdp->state = CONNECTION_STATE_NEGO;
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return True;
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}
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boolean rdp_server_accept_mcs_connect_initial(rdpRdp* rdp, STREAM* s)
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{
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int i;
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if (!mcs_read_connect_initial(rdp->mcs, s))
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return False;
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printf("Accepted client: %s\n", rdp->settings->client_hostname);
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printf("Accepted channels:");
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for (i = 0; i < rdp->settings->num_channels; i++)
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{
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printf(" %s", rdp->settings->channels[i].name);
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}
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printf("\n");
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if (!mcs_send_connect_response(rdp->mcs))
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return False;
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rdp->state = CONNECTION_STATE_MCS_CONNECT;
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return True;
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}
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boolean rdp_server_accept_mcs_erect_domain_request(rdpRdp* rdp, STREAM* s)
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{
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if (!mcs_read_erect_domain_request(rdp->mcs, s))
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return False;
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rdp->state = CONNECTION_STATE_MCS_ERECT_DOMAIN;
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return True;
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}
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boolean rdp_server_accept_mcs_attach_user_request(rdpRdp* rdp, STREAM* s)
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{
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if (!mcs_read_attach_user_request(rdp->mcs, s))
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return False;
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if (!mcs_send_attach_user_confirm(rdp->mcs))
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return False;
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rdp->state = CONNECTION_STATE_MCS_ATTACH_USER;
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return True;
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}
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boolean rdp_server_accept_mcs_channel_join_request(rdpRdp* rdp, STREAM* s)
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{
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int i;
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uint16 channel_id;
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boolean all_joined = True;
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if (!mcs_read_channel_join_request(rdp->mcs, s, &channel_id))
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return False;
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if (!mcs_send_channel_join_confirm(rdp->mcs, channel_id))
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return False;
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if (channel_id == rdp->mcs->user_id)
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rdp->mcs->user_channel_joined = True;
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else if (channel_id == MCS_GLOBAL_CHANNEL_ID)
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rdp->mcs->global_channel_joined = True;
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for (i = 0; i < rdp->settings->num_channels; i++)
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{
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if (rdp->settings->channels[i].chan_id == channel_id)
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rdp->settings->channels[i].joined = True;
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if (!rdp->settings->channels[i].joined)
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all_joined = False;
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}
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if (rdp->mcs->user_channel_joined && rdp->mcs->global_channel_joined && all_joined)
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rdp->state = CONNECTION_STATE_CHANNEL_JOIN;
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return True;
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}
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boolean rdp_server_accept_client_info(rdpRdp* rdp, STREAM* s)
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{
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if (!rdp_read_client_info(rdp, s))
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return False;
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if (!license_send_valid_client_error_packet(rdp->license))
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return False;
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rdp->state = CONNECTION_STATE_LICENSE;
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if (!rdp_send_demand_active(rdp))
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return False;
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return True;
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}
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boolean rdp_server_accept_confirm_active(rdpRdp* rdp, STREAM* s)
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{
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if (!rdp_read_confirm_active(rdp, s))
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return False;
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rdp->state = CONNECTION_STATE_ACTIVE;
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if (!rdp_send_server_synchronize_pdu(rdp))
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return False;
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if (!rdp_send_server_control_cooperate_pdu(rdp))
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return False;
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return True;
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}
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