/** * FreeRDP: A Remote Desktop Protocol Implementation * RemoteFX USB Redirection * * Copyright 2012 Atrust corp. * Copyright 2012 Alfred Liu * * 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 #include #include #include #include #include #include #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) #include #include #include #include #include #endif #if defined(__linux__) #include #endif #include #include #include #include #include #include #include #include "urbdrc_types.h" #include "urbdrc_main.h" #include "data_transfer.h" #include "searchman.h" static int func_hardware_id_format(IUDEVICE* pdev, char(*HardwareIds)[DEVICE_HARDWARE_ID_SIZE]) { char str[DEVICE_HARDWARE_ID_SIZE]; UINT16 idVendor, idProduct, bcdDevice; idVendor = (UINT16)pdev->query_device_descriptor(pdev, ID_VENDOR); idProduct = (UINT16)pdev->query_device_descriptor(pdev, ID_PRODUCT); bcdDevice = (UINT16)pdev->query_device_descriptor(pdev, BCD_DEVICE); sprintf_s(str, sizeof(str), "USB\\VID_%04"PRIX16"&PID_%04"PRIX16"", idVendor, idProduct); strncpy(HardwareIds[1], str, DEVICE_HARDWARE_ID_SIZE); sprintf_s(str, sizeof(str), "%s&REV_%04"PRIX16"", HardwareIds[1], bcdDevice); strncpy(HardwareIds[0], str, DEVICE_HARDWARE_ID_SIZE); return 0; } static int func_compat_id_format(IUDEVICE* pdev, char(*CompatibilityIds)[DEVICE_COMPATIBILITY_ID_SIZE]) { char str[DEVICE_COMPATIBILITY_ID_SIZE]; UINT8 bDeviceClass, bDeviceSubClass, bDeviceProtocol; bDeviceClass = (UINT8)pdev->query_device_descriptor(pdev, B_DEVICE_CLASS); bDeviceSubClass = (UINT8)pdev->query_device_descriptor(pdev, B_DEVICE_SUBCLASS); bDeviceProtocol = (UINT8)pdev->query_device_descriptor(pdev, B_DEVICE_PROTOCOL); if (!(pdev->isCompositeDevice(pdev))) { sprintf_s(str, sizeof(str), "USB\\Class_%02"PRIX8"", bDeviceClass); strncpy(CompatibilityIds[2], str, DEVICE_COMPATIBILITY_ID_SIZE); sprintf_s(str, sizeof(str), "%s&SubClass_%02"PRIX8"", CompatibilityIds[2], bDeviceSubClass); strncpy(CompatibilityIds[1], str, DEVICE_COMPATIBILITY_ID_SIZE); sprintf_s(str, sizeof(str), "%s&Prot_%02"PRIX8"", CompatibilityIds[1], bDeviceProtocol); strncpy(CompatibilityIds[0], str, DEVICE_COMPATIBILITY_ID_SIZE); } else { sprintf_s(str, sizeof(str), "USB\\DevClass_00"); strncpy(CompatibilityIds[2], str, DEVICE_COMPATIBILITY_ID_SIZE); sprintf_s(str, sizeof(str), "%s&SubClass_00", CompatibilityIds[2]); strncpy(CompatibilityIds[1], str, DEVICE_COMPATIBILITY_ID_SIZE); sprintf_s(str, sizeof(str), "%s&Prot_00", CompatibilityIds[1]); strncpy(CompatibilityIds[0], str, DEVICE_COMPATIBILITY_ID_SIZE); } return 0; } static void func_close_udevice(USB_SEARCHMAN* searchman, IUDEVICE* pdev) { int idVendor = 0; int idProduct = 0; URBDRC_PLUGIN* urbdrc = searchman->urbdrc; pdev->SigToEnd(pdev); idVendor = pdev->query_device_descriptor(pdev, ID_VENDOR); idProduct = pdev->query_device_descriptor(pdev, ID_PRODUCT); searchman->add(searchman, (UINT16) idVendor, (UINT16) idProduct); pdev->cancel_all_transfer_request(pdev); pdev->wait_action_completion(pdev); #if ISOCH_FIFO { /* free isoch queue */ ISOCH_CALLBACK_QUEUE* isoch_queue = pdev->get_isoch_queue(pdev); if (isoch_queue) isoch_queue->free(isoch_queue); } #endif urbdrc->udevman->unregister_udevice(urbdrc->udevman, pdev->get_bus_number(pdev), pdev->get_dev_number(pdev)); } static int fun_device_string_send_set(char* out_data, int out_offset, char* str) { int i = 0; int offset = 0; while (str[i]) { data_write_UINT16(out_data + out_offset + offset, str[i]); /* str */ i++; offset += 2; } data_write_UINT16(out_data + out_offset + offset, 0x0000); /* add "\0" */ offset += 2; return offset + out_offset; } static int func_container_id_generate(IUDEVICE* pdev, char* strContainerId) { char* p, *path; UINT8 containerId[17]; UINT16 idVendor, idProduct; idVendor = (UINT16)pdev->query_device_descriptor(pdev, ID_VENDOR); idProduct = (UINT16)pdev->query_device_descriptor(pdev, ID_PRODUCT); path = pdev->getPath(pdev); if (strlen(path) > 8) p = (path + strlen(path)) - 8; else p = path; ZeroMemory(containerId, sizeof(containerId)); sprintf_s((char*)containerId, sizeof(containerId), "%04"PRIX16"%04"PRIX16"%s", idVendor, idProduct, p); /* format */ sprintf_s(strContainerId, DEVICE_CONTAINER_STR_SIZE, "{%02"PRIx8"%02"PRIx8"%02"PRIx8"%02"PRIx8"-%02"PRIx8"%02"PRIx8"-%02"PRIx8"%02"PRIx8"-%02"PRIx8"%02"PRIx8"-%02"PRIx8"%02"PRIx8"%02"PRIx8"%02"PRIx8"%02"PRIx8"%02"PRIx8"}", containerId[0], containerId[1], containerId[2], containerId[3], containerId[4], containerId[5], containerId[6], containerId[7], containerId[8], containerId[9], containerId[10], containerId[11], containerId[12], containerId[13], containerId[14], containerId[15]); return 0; } static int func_instance_id_generate(IUDEVICE* pdev, char* strInstanceId) { UINT8 instanceId[17]; ZeroMemory(instanceId, sizeof(instanceId)); sprintf_s((char*)instanceId, sizeof(instanceId), "\\%s", pdev->getPath(pdev)); /* format */ sprintf_s(strInstanceId, DEVICE_INSTANCE_STR_SIZE, "%02"PRIx8"%02"PRIx8"%02"PRIx8"%02"PRIx8"-%02"PRIx8"%02"PRIx8"-%02"PRIx8"%02"PRIx8"-%02"PRIx8"%02"PRIx8"-%02"PRIx8"%02"PRIx8"%02"PRIx8"%02"PRIx8"%02"PRIx8"%02"PRIx8"", instanceId[0], instanceId[1], instanceId[2], instanceId[3], instanceId[4], instanceId[5], instanceId[6], instanceId[7], instanceId[8], instanceId[9], instanceId[10], instanceId[11], instanceId[12], instanceId[13], instanceId[14], instanceId[15]); return 0; } #if ISOCH_FIFO static void func_lock_isoch_mutex(TRANSFER_DATA* transfer_data) { int noAck = 0; IUDEVICE* pdev; UINT32 FunctionId; UINT32 RequestField; UINT16 URB_Function; IUDEVMAN* udevman = transfer_data->udevman; if (transfer_data->cbSize >= 8) { data_read_UINT32(transfer_data->pBuffer + 4, FunctionId); if ((FunctionId == TRANSFER_IN_REQUEST || FunctionId == TRANSFER_OUT_REQUEST) && transfer_data->cbSize >= 16) { data_read_UINT16(transfer_data->pBuffer + 14, URB_Function); if (URB_Function == URB_FUNCTION_ISOCH_TRANSFER && transfer_data->cbSize >= 20) { data_read_UINT32(transfer_data->pBuffer + 16, RequestField); noAck = (RequestField & 0x80000000) >> 31; if (!noAck) { pdev = udevman->get_udevice_by_UsbDevice(udevman, transfer_data->UsbDevice); pdev->lock_fifo_isoch(pdev); } } } } } #endif /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_process_capability_request(URBDRC_CHANNEL_CALLBACK* callback, char* data, UINT32 data_sizem, UINT32 MessageId) { UINT32 InterfaceId; UINT32 Version; UINT32 out_size; char* out_data; UINT ret; WLog_VRB(TAG, ""); data_read_UINT32(data + 0, Version); InterfaceId = ((STREAM_ID_NONE << 30) | CAPABILITIES_NEGOTIATOR); out_size = 16; out_data = (char*) calloc(1, out_size); if (!out_data) return ERROR_OUTOFMEMORY; data_write_UINT32(out_data + 0, InterfaceId); /* interface id */ data_write_UINT32(out_data + 4, MessageId); /* message id */ data_write_UINT32(out_data + 8, Version); /* usb protocol version */ data_write_UINT32(out_data + 12, 0x00000000); /* HRESULT */ ret = callback->channel->Write(callback->channel, out_size, (BYTE*) out_data, NULL); zfree(out_data); return ret; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_process_channel_create(URBDRC_CHANNEL_CALLBACK* callback, char* data, UINT32 data_sizem, UINT32 MessageId) { UINT32 InterfaceId; UINT32 out_size; UINT32 MajorVersion; UINT32 MinorVersion; UINT32 Capabilities; char* out_data; UINT ret; WLog_VRB(TAG, ""); data_read_UINT32(data + 0, MajorVersion); data_read_UINT32(data + 4, MinorVersion); data_read_UINT32(data + 8, Capabilities); InterfaceId = ((STREAM_ID_PROXY << 30) | CLIENT_CHANNEL_NOTIFICATION); out_size = 24; out_data = (char*) calloc(1, out_size); if (!out_data) return ERROR_OUTOFMEMORY; data_write_UINT32(out_data + 0, InterfaceId); /* interface id */ data_write_UINT32(out_data + 4, MessageId); /* message id */ data_write_UINT32(out_data + 8, CHANNEL_CREATED); /* function id */ data_write_UINT32(out_data + 12, MajorVersion); data_write_UINT32(out_data + 16, MinorVersion); data_write_UINT32(out_data + 20, Capabilities); /* capabilities version */ ret = callback->channel->Write(callback->channel, out_size, (BYTE*)out_data, NULL); zfree(out_data); return ret; } static int urdbrc_send_virtual_channel_add(IWTSVirtualChannel* channel, UINT32 MessageId) { UINT32 out_size; UINT32 InterfaceId; char* out_data; WLog_VRB(TAG, ""); assert(NULL != channel); assert(NULL != channel->Write); InterfaceId = ((STREAM_ID_PROXY << 30) | CLIENT_DEVICE_SINK); out_size = 12; out_data = (char*) malloc(out_size); memset(out_data, 0, out_size); data_write_UINT32(out_data + 0, InterfaceId); /* interface */ data_write_UINT32(out_data + 4, MessageId); /* message id */ data_write_UINT32(out_data + 8, ADD_VIRTUAL_CHANNEL); /* function id */ channel->Write(channel, out_size, (BYTE*) out_data, NULL); zfree(out_data); return 0; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urdbrc_send_usb_device_add(URBDRC_CHANNEL_CALLBACK* callback, IUDEVICE* pdev) { char* out_data; UINT32 InterfaceId; char HardwareIds[2][DEVICE_HARDWARE_ID_SIZE]; char CompatibilityIds[3][DEVICE_COMPATIBILITY_ID_SIZE]; char strContainerId[DEVICE_CONTAINER_STR_SIZE]; char strInstanceId[DEVICE_INSTANCE_STR_SIZE]; char* composite_str = "USB\\COMPOSITE"; int size, out_offset, cchCompatIds, bcdUSB; ISOCH_CALLBACK_QUEUE* cb_queue; UINT ret; WLog_VRB(TAG, ""); InterfaceId = ((STREAM_ID_PROXY << 30) | CLIENT_DEVICE_SINK); /* USB kernel driver detach!! */ pdev->detach_kernel_driver(pdev); #if ISOCH_FIFO /* create/initial isoch queue */ cb_queue = isoch_queue_new(); if (!cb_queue) return ERROR_OUTOFMEMORY; pdev->set_isoch_queue(pdev, (void*)cb_queue); #endif func_hardware_id_format(pdev, HardwareIds); func_compat_id_format(pdev, CompatibilityIds); func_instance_id_generate(pdev, strInstanceId); func_container_id_generate(pdev, strContainerId); cchCompatIds = strlen(CompatibilityIds[0]) + 1 + strlen(CompatibilityIds[1]) + 1 + strlen(CompatibilityIds[2]) + 2; if (pdev->isCompositeDevice(pdev)) cchCompatIds += strlen(composite_str) + 1; out_offset = 24; size = 24; size += (strlen(strInstanceId) + 1) * 2 + (strlen(HardwareIds[0]) + 1) * 2 + 4 + (strlen(HardwareIds[1]) + 1) * 2 + 2 + 4 + (cchCompatIds) * 2 + (strlen(strContainerId) + 1) * 2 + 4 + 28; out_data = (char*)calloc(1, size); if (!out_data) return ERROR_OUTOFMEMORY; data_write_UINT32(out_data + 0, InterfaceId); /* interface */ /* data_write_UINT32(out_data + 4, 0);*/ /* message id */ data_write_UINT32(out_data + 8, ADD_DEVICE); /* function id */ data_write_UINT32(out_data + 12, 0x00000001); /* NumUsbDevice */ data_write_UINT32(out_data + 16, pdev->get_UsbDevice(pdev)); /* UsbDevice */ data_write_UINT32(out_data + 20, 0x00000025); /* cchDeviceInstanceId */ out_offset = fun_device_string_send_set(out_data, out_offset, strInstanceId); data_write_UINT32(out_data + out_offset, 0x00000036); /* cchHwIds */ out_offset += 4; /* HardwareIds 1 */ out_offset = fun_device_string_send_set(out_data, out_offset, HardwareIds[0]); /* HardwareIds 2 */ out_offset = fun_device_string_send_set(out_data, out_offset, HardwareIds[1]); /*data_write_UINT16(out_data + out_offset, 0x0000);*/ /* add "\0" */ out_offset += 2; data_write_UINT32(out_data + out_offset, cchCompatIds); /* cchCompatIds */ out_offset += 4; /* CompatibilityIds 1 */ out_offset = fun_device_string_send_set(out_data, out_offset, CompatibilityIds[0]); /* CompatibilityIds 2 */ out_offset = fun_device_string_send_set(out_data, out_offset, CompatibilityIds[1]); /* CompatibilityIds 3 */ out_offset = fun_device_string_send_set(out_data, out_offset, CompatibilityIds[2]); if (pdev->isCompositeDevice(pdev)) out_offset = fun_device_string_send_set(out_data, out_offset, composite_str); /*data_write_UINT16(out_data + out_offset, 0x0000);*/ /* add "\0" */ out_offset += 2; data_write_UINT32(out_data + out_offset, 0x00000027); /* cchContainerId */ out_offset += 4; /* ContainerId */ out_offset = fun_device_string_send_set(out_data, out_offset, strContainerId); /* USB_DEVICE_CAPABILITIES 28 bytes */ data_write_UINT32(out_data + out_offset, 0x0000001c); /* CbSize */ data_write_UINT32(out_data + out_offset + 4, 2); /* UsbBusInterfaceVersion, 0 ,1 or 2 */ data_write_UINT32(out_data + out_offset + 8, 0x600); /* USBDI_Version, 0x500 or 0x600 */ /* Supported_USB_Version, 0x110,0x110 or 0x200(usb2.0) */ bcdUSB = pdev->query_device_descriptor(pdev, BCD_USB); data_write_UINT32(out_data + out_offset + 12, bcdUSB); data_write_UINT32(out_data + out_offset + 16, 0x00000000); /* HcdCapabilities, MUST always be zero */ if (bcdUSB < 0x200) data_write_UINT32(out_data + out_offset + 20, 0x00000000); /* DeviceIsHighSpeed */ else data_write_UINT32(out_data + out_offset + 20, 0x00000001); /* DeviceIsHighSpeed */ data_write_UINT32(out_data + out_offset + 24, 0x50); /* NoAckIsochWriteJitterBufferSizeInMs, >=10 or <=512 */ out_offset += 28; ret = callback->channel->Write(callback->channel, out_offset, (BYTE*)out_data, NULL); zfree(out_data); return ret; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_exchange_capabilities(URBDRC_CHANNEL_CALLBACK* callback, char* pBuffer, UINT32 cbSize) { UINT32 MessageId; UINT32 FunctionId; UINT error = CHANNEL_RC_OK; data_read_UINT32(pBuffer + 0, MessageId); data_read_UINT32(pBuffer + 4, FunctionId); switch (FunctionId) { case RIM_EXCHANGE_CAPABILITY_REQUEST: error = urbdrc_process_capability_request(callback, pBuffer + 8, cbSize - 8, MessageId); break; default: WLog_ERR(TAG, "%s: unknown FunctionId 0x%"PRIX32"", __FUNCTION__, FunctionId); error = ERROR_NOT_FOUND; break; } return error; } #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) static char* devd_get_val(char* buf, size_t buf_size, const char* val_name, size_t val_name_size, size_t* val_size) { char* ret, *buf_end, *ptr; buf_end = (buf + buf_size); for (ret = buf; ret != NULL && ret < buf_end;) { ret = memmem(ret, (buf_end - ret), val_name, val_name_size); if (ret == NULL) return NULL; /* Found. */ /* Check: space before or buf+1. */ if ((buf + 1) < ret && ret[-1] != ' ') { ret += val_name_size; continue; } /* Check: = after name and size for value. */ ret += val_name_size; if ((ret + 1) >= buf_end) return NULL; if (ret[0] != '=') continue; ret ++; break; } if (ret == NULL || val_size == NULL) return ret; /* Calc value data size. */ ptr = memchr(ret, ' ', (buf_end - ret)); if (ptr == NULL) /* End of string/last value. */ ptr = buf_end; (*val_size) = (ptr - ret); return ret; } static void* urbdrc_search_usb_device(void* arg) { USB_SEARCHMAN* searchman = (USB_SEARCHMAN*)arg; URBDRC_PLUGIN* urbdrc = (URBDRC_PLUGIN*)searchman->urbdrc; IUDEVMAN* udevman = urbdrc->udevman; IWTSVirtualChannelManager* channel_mgr = urbdrc->listener_callback->channel_mgr; IWTSVirtualChannel* dvc_channel; USB_SEARCHDEV* sdev; IUDEVICE* pdev; HANDLE listobj[2]; HANDLE mon_fd; int devd_skt; char buf[4096], *val, *ptr, *end_val; ssize_t data_size; size_t val_size, tm; long idVendor, idProduct; long busnum, devnum; int action, success, error, found, on_close; struct sockaddr_un sun; DWORD status; UINT32 error; WLog_DBG(TAG, "urbdrc_search_usb_device - devd: start"); devd_skt = socket(PF_LOCAL, SOCK_SEQPACKET, 0); if (devd_skt == -1) { WLog_ERR(TAG, "Can't create devd socket: error = %i", errno); goto err_out; } memset(&sun, 0, sizeof(sun)); sun.sun_family = PF_LOCAL; sun.sun_len = sizeof(sun); strlcpy(sun.sun_path, "/var/run/devd.seqpacket.pipe", sizeof(sun.sun_path)); if (-1 == connect(devd_skt, (struct sockaddr*)&sun, sizeof(sun))) { WLog_ERR(TAG, "Can't connect devd socket: error = %i - %s", errno, strerror(errno)); goto err_out; } /* Get the file descriptor (fd) for the monitor. This fd will get passed to select() */ mon_fd = CreateFileDescriptorEvent(NULL, TRUE, FALSE, devd_skt); listobj[0] = searchman->term_event; listobj[1] = mon_fd; while (WaitForMultipleObjects(2, listobj, FALSE, INFINITE) != WAIT_OBJECT_0) { status = WaitForMultipleObjects(2, listobj, FALSE, INFINITE); if (status == WAIT_FAILED) { error = GetLastError(); WLog_ERR(TAG, "WaitForSingleObject failed with error %"PRIu32"!", error); return 0; } if (status == WAIT_OBJECT_0) break; errno = 0; WLog_DBG(TAG, "======= SEARCH ======= "); /* !system=USB subsystem=DEVICE type=ATTACH ugen=ugen3.3 cdev=ugen3.3 vendor=0x046d product=0x082d devclass=0xef devsubclass=0x02 sernum="6E7D726F" release=0x0011 mode=host port=4 parent=ugen3.1 */ /* !system=USB subsystem=DEVICE type=DETACH ugen=ugen3.3 cdev=ugen3.3 vendor=0x046d product=0x082d devclass=0xef devsubclass=0x02 sernum="6E7D726F" release=0x0011 mode=host port=4 parent=ugen3.1 */ data_size = read(devd_skt, buf, (sizeof(buf) - 1)); if (data_size == -1) { WLog_ERR(TAG, "devd socket read: error = %i", errno); break; } buf[data_size] = 0; WLog_DBG(TAG, "devd event: %s", buf); if (buf[0] != '!') /* Skeep non notify events. */ continue; /* Check: system=USB */ val = devd_get_val(buf, data_size, "system", 6, &val_size); if (val == NULL || val_size != 3 || memcmp(val, "USB", 3) != 0) continue; /* Check: subsystem=DEVICE */ val = devd_get_val(buf, data_size, "subsystem", 9, &val_size); if (val == NULL || val_size != 6 || memcmp(val, "DEVICE", 6) != 0) continue; /* Get event type. */ val = devd_get_val(buf, data_size, "type", 4, &val_size); if (val == NULL || val_size != 6) continue; action = -1; if (memcmp(val, "ATTACH", 6) == 0) action = 0; if (memcmp(val, "DETACH", 6) == 0) action = 1; if (action == -1) continue; /* Skeep other actions. */ /* Get bus and dev num. */ /* ugen=ugen3.3 */ val = devd_get_val(buf, data_size, "ugen", 4, &val_size); if (val == NULL || val_size < 7 || memcmp(val, "ugen", 4) != 0) continue; val += 4; val_size -= 4; ptr = memchr(val, '.', val_size); if (ptr == NULL) continue; /* Prepare strings. */ ptr[0] = 0; ptr ++; val[val_size] = 0; /* Extract numbers. */ busnum = strtol(val, NULL, 0); if (errno != 0) continue; devnum = strtol(ptr, NULL, 0); if (errno != 0) continue; /* Restore spaces. */ ptr[-1] = ' '; val[val_size] = ' '; /* Handle event. */ dvc_channel = NULL; switch (action) { case 0: /* ATTACH */ sdev = NULL; success = 0; found = 0; /* vendor=0x046d */ val = devd_get_val(buf, data_size, "vendor", 6, &val_size); if (val == NULL || val_size < 1) continue; val[val_size] = 0; idVendor = strtol(val, NULL, 16); if (errno != 0) continue; val[val_size] = ' '; /* product=0x082d */ val = devd_get_val(buf, data_size, "product", 7, &val_size); if (val == NULL || val_size < 1) continue; val[val_size] = 0; idProduct = strtol(val, NULL, 16); if (errno != 0) continue; val[val_size] = ' '; WLog_DBG(TAG, "ATTACH: bus: %i, dev: %i, ven: %i, prod: %i", busnum, devnum, idVendor, idProduct); dvc_channel = channel_mgr->FindChannelById(channel_mgr, urbdrc->first_channel_id); searchman->rewind(searchman); while (dvc_channel && searchman->has_next(searchman)) { sdev = searchman->get_next(searchman); if (sdev->idVendor == idVendor && sdev->idProduct == idProduct) { WLog_VRB(TAG, "Searchman Found Device: %04"PRIx16":%04"PRIx16"", sdev->idVendor, sdev->idProduct); found = 1; break; } } if (!found && udevman->isAutoAdd(udevman)) { WLog_VRB(TAG, "Auto Find Device: %04x:%04x ", idVendor, idProduct); found = 2; } if (found) { success = udevman->register_udevice(udevman, busnum, devnum, searchman->UsbDevice, 0, 0, UDEVMAN_FLAG_ADD_BY_ADDR); } if (success) { searchman->UsbDevice ++; usleep(400000); error = urdbrc_send_virtual_channel_add(dvc_channel, 0); if (found == 1) searchman->remove(searchman, sdev->idVendor, sdev->idProduct); } break; case 1: /* DETACH */ pdev = NULL; on_close = 0; WLog_DBG(TAG, "DETACH: bus: %i, dev: %i", busnum, devnum); usleep(500000); udevman->loading_lock(udevman); udevman->rewind(udevman); while (udevman->has_next(udevman)) { pdev = udevman->get_next(udevman); if (pdev->get_bus_number(pdev) == busnum && pdev->get_dev_number(pdev) == devnum) { dvc_channel = channel_mgr->FindChannelById(channel_mgr, pdev->get_channel_id(pdev)); if (dvc_channel == NULL) { WLog_ERR(TAG, "SEARCH: dvc_channel %d is NULL!!", pdev->get_channel_id(pdev)); func_close_udevice(searchman, pdev); break; } if (!pdev->isSigToEnd(pdev)) { dvc_channel->Write(dvc_channel, 0, NULL, NULL); pdev->SigToEnd(pdev); } on_close = 1; break; } } udevman->loading_unlock(udevman); usleep(300000); if (pdev && on_close && dvc_channel && pdev->isSigToEnd(pdev) && !(pdev->isChannelClosed(pdev))) { dvc_channel->Close(dvc_channel); } break; } } CloseHandle(mon_fd); err_out: close(devd_skt); sem_post(&searchman->sem_term); WLog_DBG(TAG, "urbdrc_search_usb_device - devd: end"); return 0; } #endif #if defined (__linux__) static void* urbdrc_search_usb_device(void* arg) { USB_SEARCHMAN* searchman = (USB_SEARCHMAN*) arg; URBDRC_PLUGIN* urbdrc = (URBDRC_PLUGIN*) searchman->urbdrc; IUDEVMAN* udevman = urbdrc->udevman; IWTSVirtualChannelManager* channel_mgr; IWTSVirtualChannel* dvc_channel; USB_SEARCHDEV* sdev; IUDEVICE* pdev = NULL; HANDLE listobj[2]; HANDLE mon_fd; int numobj, timeout; long busnum, devnum; int success = 0, on_close = 0, found = 0; WLog_VRB(TAG, ""); channel_mgr = urbdrc->listener_callback->channel_mgr; DWORD status; DWORD dwError; /* init usb monitor */ struct udev* udev; struct udev_device* dev; struct udev_monitor* mon; udev = udev_new(); if (!udev) { WLog_ERR(TAG, "Can't create udev"); return 0; } /* Set up a monitor to monitor usb devices */ mon = udev_monitor_new_from_netlink(udev, "udev"); udev_monitor_filter_add_match_subsystem_devtype(mon, "usb", "usb_device"); udev_monitor_enable_receiving(mon); /* Get the file descriptor (fd) for the monitor. This fd will get passed to select() */ mon_fd = CreateFileDescriptorEvent(NULL, TRUE, FALSE, udev_monitor_get_fd(mon), WINPR_FD_READ); if (!mon_fd) goto fail_create_monfd_event; while (1) { WLog_VRB(TAG, "======= SEARCH ======= "); busnum = 0; devnum = 0; sdev = NULL; pdev = NULL; dvc_channel = NULL; on_close = 0; listobj[0] = searchman->term_event; listobj[1] = mon_fd; numobj = 2; status = WaitForMultipleObjects(numobj, listobj, FALSE, INFINITE); if (status == WAIT_FAILED) { dwError = GetLastError(); WLog_ERR(TAG, "WaitForMultipleObjects failed with error %"PRIu32"!", dwError); goto out; } status = WaitForSingleObject(searchman->term_event, 0); if (status == WAIT_FAILED) { dwError = GetLastError(); WLog_ERR(TAG, "WaitForSingleObject failed with error %"PRIu32"!", dwError); goto out; } if (status == WAIT_OBJECT_0) { sem_post(&searchman->sem_term); goto out; } status = WaitForSingleObject(mon_fd, 0); if (status == WAIT_FAILED) { dwError = GetLastError(); WLog_ERR(TAG, "WaitForSingleObject failed with error %"PRIu32"!", dwError); goto out; } if (status == WAIT_OBJECT_0) { dev = udev_monitor_receive_device(mon); if (dev) { const char* action = udev_device_get_action(dev); if (strcmp(action, "add") == 0) { long idVendor, idProduct; success = 0; found = 0; idVendor = strtol(udev_device_get_sysattr_value(dev, "idVendor"), NULL, 16); if (errno != 0) continue; idProduct = strtol(udev_device_get_sysattr_value(dev, "idProduct"), NULL, 16); if (errno != 0) continue; if (idVendor < 0 || idProduct < 0) { udev_device_unref(dev); continue; } busnum = strtol(udev_device_get_property_value(dev, "BUSNUM"), NULL, 0); if (errno != 0) continue; devnum = strtol(udev_device_get_property_value(dev, "DEVNUM"), NULL, 0); if (errno != 0) continue; dvc_channel = channel_mgr->FindChannelById(channel_mgr, urbdrc->first_channel_id); searchman->rewind(searchman); while (dvc_channel && searchman->has_next(searchman)) { sdev = searchman->get_next(searchman); if (sdev->idVendor == idVendor && sdev->idProduct == idProduct) { WLog_VRB(TAG, "Searchman Find Device: %04"PRIx16":%04"PRIx16"", sdev->idVendor, sdev->idProduct); found = 1; break; } } if (!found && udevman->isAutoAdd(udevman)) { WLog_VRB(TAG, "Auto Find Device: %04x:%04x ", idVendor, idProduct); found = 2; } if (found) { success = udevman->register_udevice(udevman, busnum, devnum, searchman->UsbDevice, 0, 0, UDEVMAN_FLAG_ADD_BY_ADDR); } if (success) { searchman->UsbDevice++; /* when we send the usb device add request, * we will detach the device driver at same * time. But, if the time of detach the * driver and attach driver is too close, * the system will crash. workaround: we * wait it for some time to avoid system * crash. */ listobj[0] = searchman->term_event; numobj = 1; timeout = 4000; /* milliseconds */ status = WaitForMultipleObjects(numobj, listobj, FALSE, timeout); if (status == WAIT_FAILED) { dwError = GetLastError(); WLog_ERR(TAG, "WaitForMultipleObjects failed with error %"PRIu32"!", dwError); goto out; } status = WaitForSingleObject(searchman->term_event, 0); if (status == WAIT_FAILED) { dwError = GetLastError(); WLog_ERR(TAG, "WaitForMultipleObjects failed with error %"PRIu32"!", dwError); goto out; } if (status == WAIT_OBJECT_0) { CloseHandle(mon_fd); sem_post(&searchman->sem_term); return 0; } urdbrc_send_virtual_channel_add(dvc_channel, 0); if (found == 1) searchman->remove(searchman, sdev->idVendor, sdev->idProduct); } } else if (strcmp(action, "remove") == 0) { busnum = strtol(udev_device_get_property_value(dev, "BUSNUM"), NULL, 0); if (errno != 0) goto out; devnum = strtol(udev_device_get_property_value(dev, "DEVNUM"), NULL, 0); if (errno != 0) goto out; usleep(500000); udevman->loading_lock(udevman); udevman->rewind(udevman); while (udevman->has_next(udevman)) { pdev = udevman->get_next(udevman); if (pdev->get_bus_number(pdev) == busnum && pdev->get_dev_number(pdev) == devnum) { dvc_channel = channel_mgr->FindChannelById(channel_mgr, pdev->get_channel_id(pdev)); if (dvc_channel == NULL) { WLog_ERR(TAG, "SEARCH: dvc_channel %d is NULL!!", pdev->get_channel_id(pdev)); func_close_udevice(searchman, pdev); break; } if (!pdev->isSigToEnd(pdev)) { dvc_channel->Write(dvc_channel, 0, NULL, NULL); pdev->SigToEnd(pdev); } on_close = 1; break; } } udevman->loading_unlock(udevman); listobj[0] = searchman->term_event; numobj = 1; timeout = 3000; /* milliseconds */ status = WaitForMultipleObjects(numobj, listobj, FALSE, timeout); if (status == WAIT_FAILED) { dwError = GetLastError(); WLog_ERR(TAG, "WaitForMultipleObjects failed with error %"PRIu32"!", dwError); goto out; } status = WaitForSingleObject(searchman->term_event, 0); if (status == WAIT_FAILED) { dwError = GetLastError(); WLog_ERR(TAG, "WaitForSingleObject failed with error %"PRIu32"!", dwError); goto out; } if (status == WAIT_OBJECT_0) { CloseHandle(mon_fd); sem_post(&searchman->sem_term); return 0; } if (pdev && on_close && dvc_channel && pdev->isSigToEnd(pdev) && !(pdev->isChannelClosed(pdev))) { on_close = 0; dvc_channel->Close(dvc_channel); } } udev_device_unref(dev); } else { WLog_ERR(TAG, "No Device from receive_device(). An error occurred."); } } } out: CloseHandle(mon_fd); fail_create_monfd_event: sem_post(&searchman->sem_term); return 0; } #endif void* urbdrc_new_device_create(void* arg) { TRANSFER_DATA* transfer_data = (TRANSFER_DATA*) arg; URBDRC_CHANNEL_CALLBACK* callback = transfer_data->callback; IWTSVirtualChannelManager* channel_mgr; URBDRC_PLUGIN* urbdrc = transfer_data->urbdrc; USB_SEARCHMAN* searchman = urbdrc->searchman; BYTE* pBuffer = transfer_data->pBuffer; IUDEVMAN* udevman = transfer_data->udevman; IUDEVICE* pdev = NULL; UINT32 ChannelId = 0; UINT32 MessageId; UINT32 FunctionId; int i = 0, found = 0; WLog_DBG(TAG, "..."); channel_mgr = urbdrc->listener_callback->channel_mgr; ChannelId = channel_mgr->GetChannelId(callback->channel); data_read_UINT32(pBuffer + 0, MessageId); data_read_UINT32(pBuffer + 4, FunctionId); int error = 0; switch (urbdrc->vchannel_status) { case INIT_CHANNEL_IN: urbdrc->first_channel_id = ChannelId; if (!searchman->start(searchman, urbdrc_search_usb_device)) { WLog_ERR(TAG, "unable to start searchman thread"); return 0; } for (i = 0; i < udevman->get_device_num(udevman); i++) error = urdbrc_send_virtual_channel_add(callback->channel, MessageId); urbdrc->vchannel_status = INIT_CHANNEL_OUT; break; case INIT_CHANNEL_OUT: udevman->loading_lock(udevman); udevman->rewind(udevman); while (udevman->has_next(udevman)) { pdev = udevman->get_next(udevman); if (!pdev->isAlreadySend(pdev)) { found = 1; pdev->setAlreadySend(pdev); pdev->set_channel_id(pdev, ChannelId); break; } } udevman->loading_unlock(udevman); if (found && pdev->isAlreadySend(pdev)) { /* when we send the usb device add request, we will detach * the device driver at same time. But, if the time of detach the * driver and attach driver is too close, the system will crash. * workaround: we wait it for some time to avoid system crash. */ error = pdev->wait_for_detach(pdev); if (error >= 0) urdbrc_send_usb_device_add(callback, pdev); } break; default: WLog_ERR(TAG, "vchannel_status unknown value %"PRIu32"", urbdrc->vchannel_status); break; } return 0; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_process_channel_notification(URBDRC_CHANNEL_CALLBACK* callback, char* pBuffer, UINT32 cbSize) { int i; UINT32 MessageId; UINT32 FunctionId; UINT error = CHANNEL_RC_OK; URBDRC_PLUGIN* urbdrc = (URBDRC_PLUGIN*) callback->plugin; WLog_DBG(TAG, "..."); data_read_UINT32(pBuffer + 0, MessageId); data_read_UINT32(pBuffer + 4, FunctionId); switch (FunctionId) { case CHANNEL_CREATED: error = urbdrc_process_channel_create(callback, pBuffer + 8, cbSize - 8, MessageId); break; case RIMCALL_RELEASE: WLog_VRB(TAG, "recv RIMCALL_RELEASE"); pthread_t thread; TRANSFER_DATA* transfer_data; transfer_data = (TRANSFER_DATA*)malloc(sizeof(TRANSFER_DATA)); if (!transfer_data) return ERROR_OUTOFMEMORY; transfer_data->callback = callback; transfer_data->urbdrc = urbdrc; transfer_data->udevman = urbdrc->udevman; transfer_data->urbdrc = urbdrc; transfer_data->cbSize = cbSize; transfer_data->pBuffer = (BYTE*) malloc((cbSize)); if (!transfer_data->pBuffer) { free(transfer_data); return ERROR_OUTOFMEMORY; } for (i = 0; i < (cbSize); i++) { transfer_data->pBuffer[i] = pBuffer[i]; } if (pthread_create(&thread, 0, urbdrc_new_device_create, transfer_data) != 0) { free(transfer_data->pBuffer); free(transfer_data); return ERROR_INVALID_OPERATION; } pthread_detach(thread); break; default: WLog_VRB(TAG, "%s: unknown FunctionId 0x%"PRIX32"", __FUNCTION__, FunctionId); error = 1; break; } return error; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_on_data_received(IWTSVirtualChannelCallback* pChannelCallback, wStream* data) { URBDRC_CHANNEL_CALLBACK* callback = (URBDRC_CHANNEL_CALLBACK*) pChannelCallback; URBDRC_PLUGIN* urbdrc; IUDEVMAN* udevman; UINT32 InterfaceTemp; UINT32 InterfaceId; UINT32 Mask; UINT error = CHANNEL_RC_OK; char* pBuffer = (char*)Stream_Pointer(data); UINT32 cbSize = Stream_GetRemainingLength(data); if (callback == NULL) return 0; if (callback->plugin == NULL) return 0; urbdrc = (URBDRC_PLUGIN*) callback->plugin; if (urbdrc->udevman == NULL) return 0; udevman = (IUDEVMAN*) urbdrc->udevman; data_read_UINT32(pBuffer + 0, InterfaceTemp); InterfaceId = (InterfaceTemp & 0x0fffffff); Mask = ((InterfaceTemp & 0xf0000000) >> 30); WLog_VRB(TAG, "Size=%"PRIu32" InterfaceId=0x%"PRIX32" Mask=0x%"PRIX32"", cbSize, InterfaceId, Mask); switch (InterfaceId) { case CAPABILITIES_NEGOTIATOR: error = urbdrc_exchange_capabilities(callback, pBuffer + 4, cbSize - 4); break; case SERVER_CHANNEL_NOTIFICATION: error = urbdrc_process_channel_notification(callback, pBuffer + 4, cbSize - 4); break; default: WLog_VRB(TAG, "InterfaceId 0x%"PRIX32" Start matching devices list", InterfaceId); pthread_t thread; TRANSFER_DATA* transfer_data; transfer_data = (TRANSFER_DATA*)malloc(sizeof(TRANSFER_DATA)); if (!transfer_data) { WLog_ERR(TAG, "transfer_data is NULL!!"); return ERROR_OUTOFMEMORY; } transfer_data->callback = callback; transfer_data->urbdrc = urbdrc; transfer_data->udevman = udevman; transfer_data->cbSize = cbSize - 4; transfer_data->UsbDevice = InterfaceId; transfer_data->pBuffer = (BYTE*)malloc((cbSize - 4)); if (!transfer_data->pBuffer) { free(transfer_data); return ERROR_OUTOFMEMORY; } memcpy(transfer_data->pBuffer, pBuffer + 4, (cbSize - 4)); /* To ensure that not too many urb requests at the same time */ udevman->wait_urb(udevman); #if ISOCH_FIFO /* lock isoch mutex */ func_lock_isoch_mutex(transfer_data); #endif error = pthread_create(&thread, 0, urbdrc_process_udev_data_transfer, transfer_data); if (error != 0) { WLog_ERR(TAG, "Create Data Transfer Thread got error = %"PRIu32"", error); free(transfer_data->pBuffer); free(transfer_data); return ERROR_INVALID_OPERATION; } pthread_detach(thread); break; } return 0; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_on_close(IWTSVirtualChannelCallback* pChannelCallback) { URBDRC_CHANNEL_CALLBACK* callback = (URBDRC_CHANNEL_CALLBACK*) pChannelCallback; URBDRC_PLUGIN* urbdrc = (URBDRC_PLUGIN*) callback->plugin; IUDEVMAN* udevman = (IUDEVMAN*) urbdrc->udevman; USB_SEARCHMAN* searchman = (USB_SEARCHMAN*) urbdrc->searchman; IUDEVICE* pdev = NULL; UINT32 ChannelId = 0; int found = 0; ChannelId = callback->channel_mgr->GetChannelId(callback->channel); WLog_INFO(TAG, "urbdrc_on_close: channel id %"PRIu32"", ChannelId); udevman->loading_lock(udevman); udevman->rewind(udevman); while (udevman->has_next(udevman)) { pdev = udevman->get_next(udevman); if (pdev->get_channel_id(pdev) == ChannelId) { found = 1; break; } } udevman->loading_unlock(udevman); if (found && pdev && !(pdev->isChannelClosed(pdev))) { pdev->setChannelClosed(pdev); func_close_udevice(searchman, pdev); } zfree(callback); WLog_DBG(TAG, "success"); return CHANNEL_RC_OK; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_on_new_channel_connection(IWTSListenerCallback* pListenerCallback, IWTSVirtualChannel* pChannel, BYTE* pData, BOOL* pbAccept, IWTSVirtualChannelCallback** ppCallback) { URBDRC_LISTENER_CALLBACK* listener_callback = (URBDRC_LISTENER_CALLBACK*) pListenerCallback; URBDRC_CHANNEL_CALLBACK* callback; WLog_VRB(TAG, ""); callback = (URBDRC_CHANNEL_CALLBACK*) calloc(1, sizeof(URBDRC_CHANNEL_CALLBACK)); if (!callback) return ERROR_OUTOFMEMORY; callback->iface.OnDataReceived = urbdrc_on_data_received; callback->iface.OnClose = urbdrc_on_close; callback->plugin = listener_callback->plugin; callback->channel_mgr = listener_callback->channel_mgr; callback->channel = pChannel; *ppCallback = (IWTSVirtualChannelCallback*) callback; return CHANNEL_RC_OK; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_plugin_initialize(IWTSPlugin* pPlugin, IWTSVirtualChannelManager* pChannelMgr) { URBDRC_PLUGIN* urbdrc = (URBDRC_PLUGIN*) pPlugin; IUDEVMAN* udevman = NULL; USB_SEARCHMAN* searchman = NULL; WLog_VRB(TAG, ""); urbdrc->listener_callback = (URBDRC_LISTENER_CALLBACK*) calloc(1, sizeof(URBDRC_LISTENER_CALLBACK)); if (!urbdrc->listener_callback) return CHANNEL_RC_NO_MEMORY; urbdrc->listener_callback->iface.OnNewChannelConnection = urbdrc_on_new_channel_connection; urbdrc->listener_callback->plugin = pPlugin; urbdrc->listener_callback->channel_mgr = pChannelMgr; /* Init searchman */ udevman = urbdrc->udevman; searchman = searchman_new((void*) urbdrc, udevman->get_defUsbDevice(udevman)); if (!searchman) { free(urbdrc->listener_callback); urbdrc->listener_callback = NULL; return CHANNEL_RC_NO_MEMORY; } urbdrc->searchman = searchman; return pChannelMgr->CreateListener(pChannelMgr, "URBDRC", 0, (IWTSListenerCallback*) urbdrc->listener_callback, NULL); } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_plugin_terminated(IWTSPlugin* pPlugin) { URBDRC_PLUGIN* urbdrc = (URBDRC_PLUGIN*) pPlugin; IUDEVMAN* udevman = urbdrc->udevman; USB_SEARCHMAN* searchman = urbdrc->searchman; WLog_VRB(TAG, ""); if (searchman) { /* close searchman */ searchman->close(searchman); /* free searchman */ if (searchman->started) { struct timespec ts; ts.tv_sec = time(NULL) + 10; ts.tv_nsec = 0; sem_timedwait(&searchman->sem_term, &ts); } searchman->free(searchman); searchman = NULL; } if (udevman) { udevman->free(udevman); udevman = NULL; } if (urbdrc->listener_callback) zfree(urbdrc->listener_callback); if (urbdrc) zfree(urbdrc); return CHANNEL_RC_OK; } static void urbdrc_register_udevman_addin(IWTSPlugin* pPlugin, IUDEVMAN* udevman) { URBDRC_PLUGIN* urbdrc = (URBDRC_PLUGIN*) pPlugin; if (urbdrc->udevman) { WLog_ERR(TAG, "existing device, abort."); return; } DEBUG_DVC("device registered."); urbdrc->udevman = udevman; } /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_load_udevman_addin(IWTSPlugin* pPlugin, const char* name, ADDIN_ARGV* args) { PFREERDP_URBDRC_DEVICE_ENTRY entry; FREERDP_URBDRC_SERVICE_ENTRY_POINTS entryPoints; entry = (PFREERDP_URBDRC_DEVICE_ENTRY) freerdp_load_channel_addin_entry("urbdrc", (LPSTR) name, NULL, 0); if (!entry) return ERROR_INVALID_OPERATION; entryPoints.plugin = pPlugin; entryPoints.pRegisterUDEVMAN = urbdrc_register_udevman_addin; entryPoints.args = args; if (entry(&entryPoints) != 0) { WLog_ERR(TAG, "%s entry returns error.", name); return ERROR_INVALID_OPERATION; } return CHANNEL_RC_OK; } BOOL urbdrc_set_subsystem(URBDRC_PLUGIN* urbdrc, char* subsystem) { free(urbdrc->subsystem); urbdrc->subsystem = _strdup(subsystem); return (urbdrc->subsystem != NULL); } COMMAND_LINE_ARGUMENT_A urbdrc_args[] = { { "dbg", COMMAND_LINE_VALUE_FLAG, "", NULL, BoolValueFalse, -1, NULL, "debug" }, { "sys", COMMAND_LINE_VALUE_REQUIRED, "", NULL, NULL, -1, NULL, "subsystem" }, { NULL, 0, NULL, NULL, NULL, -1, NULL, NULL } }; /** * Function description * * @return 0 on success, otherwise a Win32 error code */ static UINT urbdrc_process_addin_args(URBDRC_PLUGIN* urbdrc, ADDIN_ARGV* args) { int status; DWORD flags; COMMAND_LINE_ARGUMENT_A* arg; flags = COMMAND_LINE_SIGIL_NONE | COMMAND_LINE_SEPARATOR_COLON; status = CommandLineParseArgumentsA(args->argc, args->argv, urbdrc_args, flags, urbdrc, NULL, NULL); if (status < 0) return ERROR_INVALID_DATA; arg = urbdrc_args; do { if (!(arg->Flags & COMMAND_LINE_VALUE_PRESENT)) continue; CommandLineSwitchStart(arg) CommandLineSwitchCase(arg, "dbg") { WLog_SetLogLevel(WLog_Get(TAG), WLOG_TRACE); } CommandLineSwitchCase(arg, "sys") { if (!urbdrc_set_subsystem(urbdrc, arg->Value)) return ERROR_OUTOFMEMORY; } CommandLineSwitchDefault(arg) { } CommandLineSwitchEnd(arg) } while ((arg = CommandLineFindNextArgumentA(arg)) != NULL); return CHANNEL_RC_OK; } #ifdef BUILTIN_CHANNELS #define DVCPluginEntry urbdrc_DVCPluginEntry #else #define DVCPluginEntry FREERDP_API DVCPluginEntry #endif /** * Function description * * @return 0 on success, otherwise a Win32 error code */ UINT DVCPluginEntry(IDRDYNVC_ENTRY_POINTS* pEntryPoints) { UINT status = 0; ADDIN_ARGV* args; URBDRC_PLUGIN* urbdrc; urbdrc = (URBDRC_PLUGIN*) pEntryPoints->GetPlugin(pEntryPoints, "urbdrc"); args = pEntryPoints->GetPluginData(pEntryPoints); if (urbdrc == NULL) { urbdrc = (URBDRC_PLUGIN*) calloc(1, sizeof(URBDRC_PLUGIN)); if (!urbdrc) return CHANNEL_RC_NO_MEMORY; urbdrc->iface.Initialize = urbdrc_plugin_initialize; urbdrc->iface.Connected = NULL; urbdrc->iface.Disconnected = NULL; urbdrc->iface.Terminated = urbdrc_plugin_terminated; urbdrc->searchman = NULL; urbdrc->vchannel_status = INIT_CHANNEL_IN; status = pEntryPoints->RegisterPlugin(pEntryPoints, "urbdrc", (IWTSPlugin*) urbdrc); if (status != CHANNEL_RC_OK) goto error_register; } status = urbdrc_process_addin_args(urbdrc, args); if (status != CHANNEL_RC_OK) { /* TODO: we should unregister the plugin ? */ WLog_ERR(TAG, "error processing arguments"); //return status; } if (!urbdrc->subsystem && !urbdrc_set_subsystem(urbdrc, "libusb")) { /* TODO: we should unregister the plugin ? */ WLog_ERR(TAG, "error setting subsystem"); return ERROR_OUTOFMEMORY; } return urbdrc_load_udevman_addin((IWTSPlugin*) urbdrc, urbdrc->subsystem, args); error_register: free(urbdrc); return status; }