BOOL rdp_client_connect_auto_detect(rdpRdp* rdp, wStream *s) { BYTE* mark; UINT16 length; UINT16 channelId; /* If the MCS message channel has been joined... */ if (rdp->mcs->messageChannelId != 0) { /* Process any MCS message channel PDUs. */ Stream_GetPointer(s, mark); if (rdp_read_header(rdp, s, &length, &channelId)) { if (channelId == rdp->mcs->messageChannelId) { if (rdp_recv_message_channel_pdu(rdp, s) == 0) return TRUE; } } Stream_SetPointer(s, mark); } return FALSE; }
BOOL rdp_client_connect_auto_detect(rdpRdp* rdp, wStream* s) { BYTE* mark; UINT16 length; UINT16 channelId; /* If the MCS message channel has been joined... */ if (rdp->mcs->messageChannelId != 0) { /* Process any MCS message channel PDUs. */ Stream_GetPointer(s, mark); if (rdp_read_header(rdp, s, &length, &channelId)) { if (channelId == rdp->mcs->messageChannelId) { UINT16 securityFlags = 0; if (!rdp_read_security_header(s, &securityFlags, &length)) return FALSE; if (securityFlags & SEC_ENCRYPT) { if (!rdp_decrypt(rdp, s, length, securityFlags)) { WLog_ERR(TAG, "rdp_decrypt failed"); return FALSE; } } if (rdp_recv_message_channel_pdu(rdp, s, securityFlags) == 0) return TRUE; } } Stream_SetPointer(s, mark); } return FALSE; }
static int peer_recv_tpkt_pdu(freerdp_peer* client, wStream* s) { rdpRdp* rdp; UINT16 length; UINT16 pduType; UINT16 pduLength; UINT16 pduSource; UINT16 channelId; UINT16 securityFlags = 0; rdp = client->context->rdp; if (!rdp_read_header(rdp, s, &length, &channelId)) { WLog_ERR(TAG, "Incorrect RDP header."); return -1; } if (freerdp_shall_disconnect(rdp->instance)) return 0; if (rdp->settings->UseRdpSecurityLayer) { if (!rdp_read_security_header(s, &securityFlags)) return -1; if (securityFlags & SEC_ENCRYPT) { if (!rdp_decrypt(rdp, s, length - 4, securityFlags)) { WLog_ERR(TAG, "rdp_decrypt failed"); return -1; } } } if (channelId == MCS_GLOBAL_CHANNEL_ID) { if (!rdp_read_share_control_header(s, &pduLength, &pduType, &pduSource)) return -1; client->settings->PduSource = pduSource; switch (pduType) { case PDU_TYPE_DATA: if (!peer_recv_data_pdu(client, s)) return -1; break; case PDU_TYPE_CONFIRM_ACTIVE: if (!rdp_server_accept_confirm_active(rdp, s)) return -1; break; case PDU_TYPE_FLOW_RESPONSE: case PDU_TYPE_FLOW_STOP: case PDU_TYPE_FLOW_TEST: break; default: WLog_ERR(TAG, "Client sent pduType %"PRIu16"", pduType); return -1; } } else if (rdp->mcs->messageChannelId && channelId == rdp->mcs->messageChannelId) { if (!rdp->settings->UseRdpSecurityLayer) if (!rdp_read_security_header(s, &securityFlags)) return -1; return rdp_recv_message_channel_pdu(rdp, s, securityFlags); } else { if (!freerdp_channel_peer_process(client, s, channelId)) return -1; } return 0; }
static int rdp_recv_tpkt_pdu(rdpRdp* rdp, wStream* s) { UINT16 length; UINT16 pduType; UINT16 pduLength; UINT16 pduSource; UINT16 channelId = 0; UINT16 securityFlags; int nextPosition; if (!rdp_read_header(rdp, s, &length, &channelId)) { DEBUG_WARN( "Incorrect RDP header.\n"); return -1; } if (rdp->settings->DisableEncryption) { if (!rdp_read_security_header(s, &securityFlags)) return -1; if (securityFlags & (SEC_ENCRYPT | SEC_REDIRECTION_PKT)) { if (!rdp_decrypt(rdp, s, length - 4, securityFlags)) { DEBUG_WARN( "rdp_decrypt failed\n"); return -1; } } if (securityFlags & SEC_REDIRECTION_PKT) { /* * [MS-RDPBCGR] 2.2.13.2.1 * - no share control header, nor the 2 byte pad */ Stream_Rewind(s, 2); return rdp_recv_enhanced_security_redirection_packet(rdp, s); } } if (channelId == MCS_GLOBAL_CHANNEL_ID) { while (Stream_GetRemainingLength(s) > 3) { nextPosition = Stream_GetPosition(s); if (!rdp_read_share_control_header(s, &pduLength, &pduType, &pduSource)) return -1; nextPosition += pduLength; rdp->settings->PduSource = pduSource; switch (pduType) { case PDU_TYPE_DATA: if (rdp_recv_data_pdu(rdp, s) < 0) { DEBUG_WARN( "rdp_recv_data_pdu failed\n"); return -1; } break; case PDU_TYPE_DEACTIVATE_ALL: if (!rdp_recv_deactivate_all(rdp, s)) return -1; break; case PDU_TYPE_SERVER_REDIRECTION: return rdp_recv_enhanced_security_redirection_packet(rdp, s); break; default: DEBUG_WARN( "incorrect PDU type: 0x%04X\n", pduType); break; } Stream_SetPosition(s, nextPosition); } } else if (rdp->mcs->messageChannelId && channelId == rdp->mcs->messageChannelId) { return rdp_recv_message_channel_pdu(rdp, s); } else { if (!freerdp_channel_process(rdp->instance, s, channelId)) return -1; } return 0; }