FreeRDP/libfreerdp-core/connection.c

280 lines
7.8 KiB
C

/**
* FreeRDP: A Remote Desktop Protocol Client
* Connection Sequence
*
* Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.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.
*/
#include "connection.h"
#include "info.h"
/**
* Connection Sequence
* client server
* | |
* |-----------------------X.224 Connection Request PDU--------------------->|
* |<----------------------X.224 Connection Confirm PDU----------------------|
* |-------MCS Connect-Initial PDU with GCC Conference Create Request------->|
* |<-----MCS Connect-Response PDU with GCC Conference Create Response-------|
* |------------------------MCS Erect Domain Request PDU-------------------->|
* |------------------------MCS Attach User Request PDU--------------------->|
* |<-----------------------MCS Attach User Confirm PDU----------------------|
* |------------------------MCS Channel Join Request PDU-------------------->|
* |<-----------------------MCS Channel Join Confirm PDU---------------------|
* |----------------------------Security Exchange PDU----------------------->|
* |-------------------------------Client Info PDU-------------------------->|
* |<---------------------License Error PDU - Valid Client-------------------|
* |<-----------------------------Demand Active PDU--------------------------|
* |------------------------------Confirm Active PDU------------------------>|
* |-------------------------------Synchronize PDU-------------------------->|
* |---------------------------Control PDU - Cooperate---------------------->|
* |------------------------Control PDU - Request Control------------------->|
* |--------------------------Persistent Key List PDU(s)-------------------->|
* |--------------------------------Font List PDU--------------------------->|
* |<------------------------------Synchronize PDU---------------------------|
* |<--------------------------Control PDU - Cooperate-----------------------|
* |<-----------------------Control PDU - Granted Control--------------------|
* |<-------------------------------Font Map PDU-----------------------------|
*
*/
/**
* Establish RDP Connection.\n
* @msdn{cc240452}
* @param rdp RDP module
*/
boolean rdp_client_connect(rdpRdp* rdp)
{
boolean ret;
rdp->settings->autologon = 1;
nego_init(rdp->nego);
nego_set_target(rdp->nego, rdp->settings->hostname, rdp->settings->port);
nego_set_cookie(rdp->nego, rdp->settings->username);
nego_enable_rdp(rdp->nego, rdp->settings->rdp_security);
nego_enable_nla(rdp->nego, rdp->settings->nla_security);
nego_enable_tls(rdp->nego, rdp->settings->tls_security);
if (nego_connect(rdp->nego) != True)
{
printf("Error: protocol security negotiation failure\n");
return False;
}
ret = False;
if (rdp->nego->selected_protocol & PROTOCOL_NLA)
ret = transport_connect_nla(rdp->transport);
else if (rdp->nego->selected_protocol & PROTOCOL_TLS)
ret = transport_connect_tls(rdp->transport);
else if (rdp->nego->selected_protocol & PROTOCOL_RDP)
ret = transport_connect_rdp(rdp->transport);
if (!ret)
return False;
if (mcs_connect(rdp->mcs) != True)
{
printf("Error: Multipoint Connection Service (MCS) connection failure\n");
return False;
}
rdp_send_client_info(rdp);
if (license_connect(rdp->license) != True)
{
printf("Error: license connection sequence failure\n");
return False;
}
rdp->licensed = True;
rdp_client_activate(rdp);
rdp_set_blocking_mode(rdp, False);
return True;
}
boolean rdp_server_accept_nego(rdpRdp* rdp, STREAM* s)
{
boolean ret;
transport_set_blocking_mode(rdp->transport, True);
if (!nego_recv_request(rdp->nego, s))
return False;
if (rdp->nego->requested_protocols == PROTOCOL_RDP)
{
printf("Standard RDP encryption is not supported.\n");
return False;
}
printf("Requested protocols:");
if ((rdp->nego->requested_protocols | PROTOCOL_TLS))
{
printf(" TLS");
if (rdp->settings->tls_security)
{
printf("(Y)");
rdp->nego->selected_protocol |= PROTOCOL_TLS;
}
else
printf("(n)");
}
if ((rdp->nego->requested_protocols | PROTOCOL_NLA))
{
printf(" NLA");
if (rdp->settings->nla_security)
{
printf("(Y)");
rdp->nego->selected_protocol |= PROTOCOL_NLA;
}
else
printf("(n)");
}
printf("\n");
nego_send_negotiation_response(rdp->nego);
ret = False;
if (rdp->nego->selected_protocol & PROTOCOL_NLA)
ret = transport_accept_nla(rdp->transport);
else if (rdp->nego->selected_protocol & PROTOCOL_TLS)
ret = transport_accept_tls(rdp->transport);
else if (rdp->nego->selected_protocol & PROTOCOL_RDP)
ret = transport_accept_rdp(rdp->transport);
if (!ret)
return False;
transport_set_blocking_mode(rdp->transport, False);
rdp->state = CONNECTION_STATE_NEGO;
return True;
}
boolean rdp_server_accept_mcs_connect_initial(rdpRdp* rdp, STREAM* s)
{
int i;
if (!mcs_read_connect_initial(rdp->mcs, s))
return False;
printf("Accepted client: %s\n", rdp->settings->client_hostname);
printf("Accepted channels:");
for (i = 0; i < rdp->settings->num_channels; i++)
{
printf(" %s", rdp->settings->channels[i].name);
}
printf("\n");
if (!mcs_send_connect_response(rdp->mcs))
return False;
rdp->state = CONNECTION_STATE_MCS_CONNECT;
return True;
}
boolean rdp_server_accept_mcs_erect_domain_request(rdpRdp* rdp, STREAM* s)
{
if (!mcs_read_erect_domain_request(rdp->mcs, s))
return False;
rdp->state = CONNECTION_STATE_MCS_ERECT_DOMAIN;
return True;
}
boolean rdp_server_accept_mcs_attach_user_request(rdpRdp* rdp, STREAM* s)
{
if (!mcs_read_attach_user_request(rdp->mcs, s))
return False;
if (!mcs_send_attach_user_confirm(rdp->mcs))
return False;
rdp->state = CONNECTION_STATE_MCS_ATTACH_USER;
return True;
}
boolean rdp_server_accept_mcs_channel_join_request(rdpRdp* rdp, STREAM* s)
{
int i;
uint16 channel_id;
boolean all_joined = True;
if (!mcs_read_channel_join_request(rdp->mcs, s, &channel_id))
return False;
if (!mcs_send_channel_join_confirm(rdp->mcs, channel_id))
return False;
if (channel_id == rdp->mcs->user_id)
rdp->mcs->user_channel_joined = True;
else if (channel_id == MCS_GLOBAL_CHANNEL_ID)
rdp->mcs->global_channel_joined = True;
for (i = 0; i < rdp->settings->num_channels; i++)
{
if (rdp->settings->channels[i].chan_id == channel_id)
rdp->settings->channels[i].joined = True;
if (!rdp->settings->channels[i].joined)
all_joined = False;
}
if (rdp->mcs->user_channel_joined && rdp->mcs->global_channel_joined && all_joined)
rdp->state = CONNECTION_STATE_CHANNEL_JOIN;
return True;
}
boolean rdp_server_accept_client_info(rdpRdp* rdp, STREAM* s)
{
if (!rdp_read_client_info(rdp, s))
return False;
if (!license_send_valid_client_error_packet(rdp->license))
return False;
rdp->state = CONNECTION_STATE_LICENSE;
if (!rdp_send_demand_active(rdp))
return False;
return True;
}
boolean rdp_server_accept_confirm_active(rdpRdp* rdp, STREAM* s)
{
if (!rdp_read_confirm_active(rdp, s))
return False;
rdp->state = CONNECTION_STATE_ACTIVE;
if (!rdp_send_server_synchronize_pdu(rdp))
return False;
if (!rdp_send_server_control_cooperate_pdu(rdp))
return False;
return True;
}