int rts_recv_CONN_A3_pdu(rdpRpc* rpc, BYTE* buffer, UINT32 length)
{
UINT32 ConnectionTimeout;
rts_connection_timeout_command_read(rpc, &buffer[24], length - 24, &ConnectionTimeout);
DEBUG_RTS("ConnectionTimeout: %d", ConnectionTimeout);
rpc->VirtualConnection->DefaultInChannel->PingOriginator.ConnectionTimeout = ConnectionTimeout;
return 0;
}
int rts_recv_CONN_C2_pdu(rdpRpc* rpc, BYTE* buffer, UINT32 length)
{
UINT32 offset;
UINT32 ReceiveWindowSize;
UINT32 ConnectionTimeout;
offset = 24;
offset += rts_version_command_read(rpc, &buffer[offset], length - offset) + 4;
offset += rts_receive_window_size_command_read(rpc, &buffer[offset], length - offset, &ReceiveWindowSize) + 4;
offset += rts_connection_timeout_command_read(rpc, &buffer[offset], length - offset, &ConnectionTimeout) + 4;
DEBUG_RTS("ConnectionTimeout: %d", ConnectionTimeout);
DEBUG_RTS("ReceiveWindowSize: %d", ReceiveWindowSize);
/* TODO: verify if this is the correct protocol variable */
rpc->VirtualConnection->DefaultInChannel->PingOriginator.ConnectionTimeout = ConnectionTimeout;
rpc->VirtualConnection->DefaultInChannel->PeerReceiveWindow = ReceiveWindowSize;
rpc->VirtualConnection->DefaultInChannel->State = CLIENT_IN_CHANNEL_STATE_OPENED;
rpc->VirtualConnection->DefaultOutChannel->State = CLIENT_OUT_CHANNEL_STATE_OPENED;
return 0;
}
int rts_recv_pdu_commands(rdpRpc* rpc, RTS_PDU* rts_pdu)
{
int i;
STREAM* s;
UINT32 CommandType;
DEBUG_RTS("numberOfCommands:%d", rts_pdu->header.numberOfCommands);
if (rts_pdu->header.flags & RTS_FLAG_PING)
{
rts_send_keep_alive_pdu(rpc);
return 0;
}
s = stream_new(0);
stream_attach(s, rts_pdu->content, rts_pdu->header.frag_length);
for (i = 0; i < rts_pdu->header.numberOfCommands; i++)
{
stream_read_UINT32(s, CommandType); /* CommandType (4 bytes) */
DEBUG_RTS("CommandType: %s (0x%08X)", RTS_CMD_STRINGS[CommandType % 14], CommandType);
switch (CommandType)
{
case RTS_CMD_RECEIVE_WINDOW_SIZE:
rts_receive_window_size_command_read(rpc, s);
break;
case RTS_CMD_FLOW_CONTROL_ACK:
rts_flow_control_ack_command_read(rpc, s);
break;
case RTS_CMD_CONNECTION_TIMEOUT:
rts_connection_timeout_command_read(rpc, s);
break;
case RTS_CMD_COOKIE:
rts_cookie_command_read(rpc, s);
break;
case RTS_CMD_CHANNEL_LIFETIME:
rts_channel_lifetime_command_read(rpc, s);
break;
case RTS_CMD_CLIENT_KEEPALIVE:
rts_client_keepalive_command_read(rpc, s);
break;
case RTS_CMD_VERSION:
rts_version_command_read(rpc, s);
break;
case RTS_CMD_EMPTY:
rts_empty_command_read(rpc, s);
break;
case RTS_CMD_PADDING:
rts_padding_command_read(rpc, s);
break;
case RTS_CMD_NEGATIVE_ANCE:
rts_negative_ance_command_read(rpc, s);
break;
case RTS_CMD_ANCE:
rts_ance_command_read(rpc, s);
break;
case RTS_CMD_CLIENT_ADDRESS:
rts_client_address_command_read(rpc, s);
break;
case RTS_CMD_ASSOCIATION_GROUP_ID:
rts_association_group_id_command_read(rpc, s);
break;
case RTS_CMD_DESTINATION:
rts_destination_command_read(rpc, s);
break;
case RTS_CMD_PING_TRAFFIC_SENT_NOTIFY:
rts_ping_traffic_sent_notify_command_read(rpc, s);
break;
default:
printf("Error: Unknown RTS Command Type: 0x%x\n", CommandType);
stream_detach(s) ;
stream_free(s) ;
return -1;
break;
}
}
stream_detach(s);
stream_free(s);
return 0;
}
BOOL rts_connect(rdpRpc* rpc)
{
RPC_PDU* pdu;
rpcconn_rts_hdr_t* rts;
HttpResponse* http_response;
/**
* Connection Opening
*
* When opening a virtual connection to the server, an implementation of this protocol MUST perform
* the following sequence of steps:
*
* 1. Send an IN channel request as specified in section 2.1.2.1.1, containing the connection timeout,
* ResourceType UUID, and Session UUID values, if any, supplied by the higher-layer protocol or application.
*
* 2. Send an OUT channel request as specified in section 2.1.2.1.2.
*
* 3. Send a CONN/A1 RTS PDU as specified in section 2.2.4.2
*
* 4. Send a CONN/B1 RTS PDU as specified in section 2.2.4.5
*
* 5. Wait for the connection establishment protocol sequence as specified in 3.2.1.5.3.1 to complete
*
* An implementation MAY execute steps 1 and 2 in parallel. An implementation SHOULD execute steps
* 3 and 4 in parallel. An implementation MUST execute step 3 after completion of step 1 and execute
* step 4 after completion of step 2.
*
*/
rpc->VirtualConnection->State = VIRTUAL_CONNECTION_STATE_INITIAL;
DEBUG_RTS("VIRTUAL_CONNECTION_STATE_INITIAL");
rpc->client->SynchronousSend = TRUE;
rpc->client->SynchronousReceive = TRUE;
if (!rpc_ntlm_http_out_connect(rpc))
{
printf("rpc_out_connect_http error!\n");
return FALSE;
}
if (rts_send_CONN_A1_pdu(rpc) != 0)
{
printf("rpc_send_CONN_A1_pdu error!\n");
return FALSE;
}
if (!rpc_ntlm_http_in_connect(rpc))
{
printf("rpc_in_connect_http error!\n");
return FALSE;
}
if (rts_send_CONN_B1_pdu(rpc) != 0)
{
printf("rpc_send_CONN_B1_pdu error!\n");
return FALSE;
}
rpc->VirtualConnection->State = VIRTUAL_CONNECTION_STATE_OUT_CHANNEL_WAIT;
DEBUG_RTS("VIRTUAL_CONNECTION_STATE_OUT_CHANNEL_WAIT");
/**
* Receive OUT Channel Response
*
* A client implementation MUST NOT accept the OUT channel HTTP response in any state other than
* Out Channel Wait. If received in any other state, this HTTP response is a protocol error. Therefore,
* the client MUST consider the virtual connection opening a failure and indicate this to higher layers
* in an implementation-specific way. The Microsoft Windows® implementation returns
* RPC_S_PROTOCOL_ERROR, as specified in [MS-ERREF], to higher-layer protocols.
*
* If this HTTP response is received in Out Channel Wait state, the client MUST process the fields of
* this response as defined in this section.
*
* First, the client MUST determine whether the response indicates a success or a failure. If the status
* code is set to 200, the client MUST interpret this as a success, and it MUST do the following:
*
* 1. Ignore the values of all other header fields.
*
* 2. Transition to Wait_A3W state.
*
* 3. Wait for network events.
*
* 4. Skip the rest of the processing in this section.
*
* If the status code is not set to 200, the client MUST interpret this as a failure and follow the same
* processing rules as specified in section 3.2.2.5.6.
*
*/
http_response = http_response_recv(rpc->TlsOut);
if (http_response->StatusCode != 200)
{
printf("rts_connect error! Status Code: %d\n", http_response->StatusCode);
http_response_print(http_response);
http_response_free(http_response);
return FALSE;
}
//http_response_print(http_response);
http_response_free(http_response);
rpc->VirtualConnection->State = VIRTUAL_CONNECTION_STATE_WAIT_A3W;
DEBUG_RTS("VIRTUAL_CONNECTION_STATE_WAIT_A3W");
/**
* Receive CONN_A3 RTS PDU
*
* A client implementation MUST NOT accept the CONN/A3 RTS PDU in any state other than
* Wait_A3W. If received in any other state, this PDU is a protocol error and the client
* MUST consider the virtual connection opening a failure and indicate this to higher
* layers in an implementation-specific way.
*
* Set the ConnectionTimeout in the Ping Originator of the Client's IN Channel to the
* ConnectionTimeout in the CONN/A3 PDU.
*
* If this RTS PDU is received in Wait_A3W state, the client MUST transition the state
* machine to Wait_C2 state and wait for network events.
*
*/
rpc_client_start(rpc);
pdu = rpc_recv_dequeue_pdu(rpc);
if (!pdu)
return FALSE;
rts = (rpcconn_rts_hdr_t*) Stream_Buffer(pdu->s);
if (!rts_match_pdu_signature(rpc, &RTS_PDU_CONN_A3_SIGNATURE, rts))
{
printf("Unexpected RTS PDU: Expected CONN/A3\n");
return FALSE;
}
rts_recv_CONN_A3_pdu(rpc, Stream_Buffer(pdu->s), Stream_Length(pdu->s));
rpc_client_receive_pool_return(rpc, pdu);
rpc->VirtualConnection->State = VIRTUAL_CONNECTION_STATE_WAIT_C2;
DEBUG_RTS("VIRTUAL_CONNECTION_STATE_WAIT_C2");
/**
* Receive CONN_C2 RTS PDU
*
* A client implementation MUST NOT accept the CONN/C2 RTS PDU in any state other than Wait_C2.
* If received in any other state, this PDU is a protocol error and the client MUST consider the virtual
* connection opening a failure and indicate this to higher layers in an implementation-specific way.
*
* If this RTS PDU is received in Wait_C2 state, the client implementation MUST do the following:
*
* 1. Transition the state machine to opened state.
*
* 2. Set the connection time-out protocol variable to the value of the ConnectionTimeout field from
* the CONN/C2 RTS PDU.
*
* 3. Set the PeerReceiveWindow value in the SendingChannel of the Client IN Channel to the
* ReceiveWindowSize value in the CONN/C2 PDU.
*
* 4. Indicate to higher-layer protocols that the virtual connection opening is a success.
*
*/
pdu = rpc_recv_dequeue_pdu(rpc);
if (!pdu)
return FALSE;
rts = (rpcconn_rts_hdr_t*) Stream_Buffer(pdu->s);
if (!rts_match_pdu_signature(rpc, &RTS_PDU_CONN_C2_SIGNATURE, rts))
{
printf("Unexpected RTS PDU: Expected CONN/C2\n");
return FALSE;
}
rts_recv_CONN_C2_pdu(rpc, Stream_Buffer(pdu->s), Stream_Length(pdu->s));
rpc_client_receive_pool_return(rpc, pdu);
rpc->VirtualConnection->State = VIRTUAL_CONNECTION_STATE_OPENED;
DEBUG_RTS("VIRTUAL_CONNECTION_STATE_OPENED");
rpc->client->SynchronousSend = TRUE;
rpc->client->SynchronousReceive = TRUE;
return TRUE;
}
