[libserialport.git] / windows.c

/*
 * This file is part of the libserialport project.
 *
 * Copyright (C) 2013-2014 Martin Ling <martin-libserialport@earth.li>
 * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "libserialport.h"
#include "libserialport_internal.h"

/* USB path is a string of at most 8 decimal numbers < 128 separated by dots */
#define MAX_USB_PATH  (8*3 + 7*1 + 1)

static void enumerate_hub(struct sp_port *port, char *hub_name,
                          char *parent_path);

static char *wc_to_utf8(PWCHAR wc_buffer, ULONG size)
{
	WCHAR wc_str[size/sizeof(WCHAR)+1];
	char *utf8_str;

	/* zero terminate the wide char string */
	memcpy(wc_str, wc_buffer, size);
	wc_str[sizeof(wc_str)-1] = 0;

	/* compute the size of the utf8 converted string */
	if (!(size = WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
	                                 NULL, 0, NULL, NULL)))
		return NULL;

	/* allocate utf8 output buffer */
	if (!(utf8_str = malloc(size)))
		return NULL;

	/* actually converted to utf8 */
	if (!WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
	                         utf8_str, size, NULL, NULL)) {
		free(utf8_str);
		return NULL;
	}

	return utf8_str;
}

static char *get_root_hub_name(HANDLE host_controller)
{
	USB_ROOT_HUB_NAME  root_hub_name;
	PUSB_ROOT_HUB_NAME root_hub_name_wc;
	char *root_hub_name_utf8;
	ULONG size = 0;

	/* compute the size of the root hub name string */
	if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME, 0, 0,
	                     &root_hub_name, sizeof(root_hub_name), &size, NULL))
		return NULL;

	/* allocate wide char root hub name string */
	size = root_hub_name.ActualLength;
	if (!(root_hub_name_wc = malloc(size)))
		return NULL;

	/* actually get the root hub name string */
	if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME,
	                     NULL, 0, root_hub_name_wc, size, &size, NULL)) {
		free(root_hub_name_wc);
		return NULL;
	}

	/* convert the root hub name string to utf8 */
	root_hub_name_utf8 = wc_to_utf8(root_hub_name_wc->RootHubName, size);
	free(root_hub_name_wc);
	return root_hub_name_utf8;
}

static char *get_external_hub_name(HANDLE hub, ULONG connection_index)
{
	USB_NODE_CONNECTION_NAME  ext_hub_name;
	PUSB_NODE_CONNECTION_NAME ext_hub_name_wc;
	char *ext_hub_name_utf8;
	ULONG size;

	/* compute the size of the external hub name string */
	ext_hub_name.ConnectionIndex = connection_index;
	if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
	                     &ext_hub_name, sizeof(ext_hub_name),
	                     &ext_hub_name, sizeof(ext_hub_name), &size, NULL))
		return NULL;

	/* allocate wide char external hub name string */
	size = ext_hub_name.ActualLength;
	if (size <= sizeof(ext_hub_name)
	    || !(ext_hub_name_wc = malloc(size)))
		return NULL;

	/* get the name of the external hub attached to the specified port */
	ext_hub_name_wc->ConnectionIndex = connection_index;
	if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
	                     ext_hub_name_wc, size,
	                     ext_hub_name_wc, size, &size, NULL)) {
		free(ext_hub_name_wc);
		return NULL;
	}

	/* convert the external hub name string to utf8 */
	ext_hub_name_utf8 = wc_to_utf8(ext_hub_name_wc->NodeName, size);
	free(ext_hub_name_wc);
	return ext_hub_name_utf8;
}

static char *get_string_descriptor(HANDLE hub_device, ULONG connection_index,
                                   UCHAR descriptor_index)
{
	char desc_req_buf[sizeof(USB_DESCRIPTOR_REQUEST) +
	                  MAXIMUM_USB_STRING_LENGTH] = { 0 };
	PUSB_DESCRIPTOR_REQUEST desc_req = (void *) desc_req_buf;
	PUSB_STRING_DESCRIPTOR  desc     = (void *) (desc_req + 1);
	ULONG size = sizeof(desc_req_buf);

	desc_req->ConnectionIndex     = connection_index;
	desc_req->SetupPacket.wValue  = (USB_STRING_DESCRIPTOR_TYPE << 8)
	                                | descriptor_index;
	desc_req->SetupPacket.wIndex  = 0;
	desc_req->SetupPacket.wLength = size - sizeof(*desc_req);

	if (!DeviceIoControl(hub_device,
	                     IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
	                     desc_req, size, desc_req, size, &size, NULL)
	    || size < 2
	    || desc->bDescriptorType != USB_STRING_DESCRIPTOR_TYPE
	    || desc->bLength != size - sizeof(*desc_req)
	    || desc->bLength % 2)
		return NULL;

	return wc_to_utf8(desc->bString, desc->bLength);
}

static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
                                ULONG nb_ports, char *parent_path)
{
	char path[MAX_USB_PATH];
	ULONG index = 0;

	for (index = 1; index <= nb_ports; index++) {
		PUSB_NODE_CONNECTION_INFORMATION_EX connection_info_ex;
		ULONG size = sizeof(*connection_info_ex) + 30*sizeof(USB_PIPE_INFO);

		if (!(connection_info_ex = malloc(size)))
			break;

		connection_info_ex->ConnectionIndex = index;
		if (!DeviceIoControl(hub_device,
		                     IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX,
		                     connection_info_ex, size,
		                     connection_info_ex, size, &size, NULL)) {
			/* try to get CONNECTION_INFORMATION if CONNECTION_INFORMATION_EX
			   did not work */
			PUSB_NODE_CONNECTION_INFORMATION connection_info;

			size = sizeof(*connection_info) + 30*sizeof(USB_PIPE_INFO);
			if (!(connection_info = malloc(size))) {
				free(connection_info_ex);
				continue;
			}
			connection_info->ConnectionIndex = index;
			if (!DeviceIoControl(hub_device,
			                     IOCTL_USB_GET_NODE_CONNECTION_INFORMATION,
			                     connection_info, size,
			                     connection_info, size, &size, NULL)) {
				free(connection_info);
				free(connection_info_ex);
				continue;
			}

			connection_info_ex->ConnectionIndex = connection_info->ConnectionIndex;
			connection_info_ex->DeviceDescriptor = connection_info->DeviceDescriptor;
			connection_info_ex->DeviceIsHub = connection_info->DeviceIsHub;
			connection_info_ex->DeviceAddress = connection_info->DeviceAddress;
			free(connection_info);
		}

		if (connection_info_ex->DeviceIsHub) {
			/* recursively enumerate external hub */
			PCHAR ext_hub_name;
			if ((ext_hub_name = get_external_hub_name(hub_device, index))) {
				snprintf(path, sizeof(path), "%s%ld.",
				         parent_path, connection_info_ex->ConnectionIndex);
				enumerate_hub(port, ext_hub_name, path);
			}
			free(connection_info_ex);
		} else {
			snprintf(path, sizeof(path), "%s%ld",
			         parent_path, connection_info_ex->ConnectionIndex);

			/* check if this device is the one we search for */
			if (strcmp(path, port->usb_path)) {
				free(connection_info_ex);
				continue;
			}

			/* finally grab detailed informations regarding the device */
			port->usb_address = connection_info_ex->DeviceAddress + 1;
			port->usb_vid = connection_info_ex->DeviceDescriptor.idVendor;
			port->usb_pid = connection_info_ex->DeviceDescriptor.idProduct;

			if (connection_info_ex->DeviceDescriptor.iManufacturer)
				port->usb_manufacturer = get_string_descriptor(hub_device,index,
				           connection_info_ex->DeviceDescriptor.iManufacturer);
			if (connection_info_ex->DeviceDescriptor.iProduct)
				port->usb_product = get_string_descriptor(hub_device, index,
				           connection_info_ex->DeviceDescriptor.iProduct);
			if (connection_info_ex->DeviceDescriptor.iSerialNumber)
				port->usb_serial = get_string_descriptor(hub_device, index,
				           connection_info_ex->DeviceDescriptor.iSerialNumber);

			free(connection_info_ex);
			break;
		}
	}
}

static void enumerate_hub(struct sp_port *port, char *hub_name,
                          char *parent_path)
{
	USB_NODE_INFORMATION hub_info;
	HANDLE hub_device;
	ULONG size = sizeof(hub_info);
	char *device_name;

	/* open the hub with its full name */
	if (!(device_name = malloc(strlen("\\\\.\\") + strlen(hub_name) + 1)))
		return;
	strcpy(device_name, "\\\\.\\");
	strcat(device_name, hub_name);
	hub_device = CreateFile(device_name, GENERIC_WRITE, FILE_SHARE_WRITE,
	                        NULL, OPEN_EXISTING, 0, NULL);
	free(device_name);
	if (hub_device == INVALID_HANDLE_VALUE)
		return;

	/* get the number of ports of the hub */
	if (DeviceIoControl(hub_device, IOCTL_USB_GET_NODE_INFORMATION,
	                    &hub_info, size, &hub_info, size, &size, NULL))
		/* enumerate the ports of the hub */
		enumerate_hub_ports(port, hub_device,
		   hub_info.u.HubInformation.HubDescriptor.bNumberOfPorts, parent_path);

	CloseHandle(hub_device);
}

static void enumerate_host_controller(struct sp_port *port,
                                      HANDLE host_controller_device)
{
	char *root_hub_name;

	if ((root_hub_name = get_root_hub_name(host_controller_device))) {
		enumerate_hub(port, root_hub_name, "");
		free(root_hub_name);
	}
}

static void get_usb_details(struct sp_port *port, DEVINST dev_inst_match)
{
	HDEVINFO device_info;
	SP_DEVINFO_DATA device_info_data;
	ULONG i, size = 0;

	device_info = SetupDiGetClassDevs(&GUID_CLASS_USB_HOST_CONTROLLER,NULL,NULL,
	                                  DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
	device_info_data.cbSize = sizeof(device_info_data);

	for (i=0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
		SP_DEVICE_INTERFACE_DATA device_interface_data;
		PSP_DEVICE_INTERFACE_DETAIL_DATA device_detail_data;
		DEVINST dev_inst = dev_inst_match;
		HANDLE host_controller_device;

		device_interface_data.cbSize = sizeof(device_interface_data);
		if (!SetupDiEnumDeviceInterfaces(device_info, 0,
		                                 &GUID_CLASS_USB_HOST_CONTROLLER,
		                                 i, &device_interface_data))
			continue;

		if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
		                                     NULL, 0, &size, NULL)
		    && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
			continue;

		if (!(device_detail_data = malloc(size)))
			continue;
		device_detail_data->cbSize = sizeof(*device_detail_data);
		if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
		                                     device_detail_data, size, &size,
		                                     NULL)) {
			free(device_detail_data);
			continue;
		}

		while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS
		       && dev_inst != device_info_data.DevInst) { }
		if (dev_inst != device_info_data.DevInst) {
			free(device_detail_data);
			continue;
		}

		port->usb_bus = i + 1;

		host_controller_device = CreateFile(device_detail_data->DevicePath,
		                                    GENERIC_WRITE, FILE_SHARE_WRITE,
		                                    NULL, OPEN_EXISTING, 0, NULL);
		if (host_controller_device != INVALID_HANDLE_VALUE) {
			enumerate_host_controller(port, host_controller_device);
			CloseHandle(host_controller_device);
		}
		free(device_detail_data);
	}

	SetupDiDestroyDeviceInfoList(device_info);
	return;
}

SP_PRIV enum sp_return get_port_details(struct sp_port *port)
{
	/* Description limited to 127 char,
	   anything longer would not be user friendly anyway */
	char description[128];
	SP_DEVINFO_DATA device_info_data = { .cbSize = sizeof(device_info_data) };
	HDEVINFO device_info;
	int i;

	device_info = SetupDiGetClassDevs(NULL, 0, 0,
	                                  DIGCF_PRESENT | DIGCF_ALLCLASSES);
	if (device_info == INVALID_HANDLE_VALUE)
		RETURN_FAIL("SetupDiGetClassDevs() failed");

	for (i=0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
		HKEY device_key;
		DEVINST dev_inst;
		char value[8], class[16];
		DWORD size, type;
		CONFIGRET cr;

		/* check if this is the device we are looking for */
		device_key = SetupDiOpenDevRegKey(device_info, &device_info_data,
		                                  DICS_FLAG_GLOBAL, 0,
		                                  DIREG_DEV, KEY_QUERY_VALUE);
		if (device_key == INVALID_HANDLE_VALUE)
			continue;
		size = sizeof(value);
		if (RegQueryValueExA(device_key, "PortName", NULL, &type, (LPBYTE)value,
		                     &size) != ERROR_SUCCESS || type != REG_SZ) {
			RegCloseKey(device_key);
			continue;
		}
		RegCloseKey(device_key);
		value[sizeof(value)-1] = 0;
		if (strcmp(value, port->name))
			continue;

		/* check port transport type */
		dev_inst = device_info_data.DevInst;
		size = sizeof(class);
		cr = CR_FAILURE;
		while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS &&
		       (cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
		                 CM_DRP_CLASS, 0, class, &size, 0)) != CR_SUCCESS) { }
		if (cr == CR_SUCCESS) {
			if (!strcmp(class, "USB"))
				port->transport = SP_TRANSPORT_USB;
		}

		/* get port description (friendly name) */
		dev_inst = device_info_data.DevInst;
		size = sizeof(description);
		while ((cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
		          CM_DRP_FRIENDLYNAME, 0, description, &size, 0)) != CR_SUCCESS
		       && CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) { }
		if (cr == CR_SUCCESS)
			port->description = strdup(description);

		/* get more informations for USB connected ports */
		if (port->transport == SP_TRANSPORT_USB) {
			char usb_path[MAX_USB_PATH] = "", tmp[MAX_USB_PATH];
			char device_id[MAX_DEVICE_ID_LEN];

			/* recurse over parents to build the USB device path */
			dev_inst = device_info_data.DevInst;
			do {
				/* verify that this layer of the tree is USB related */
				if (CM_Get_Device_IDA(dev_inst, device_id,
				                      sizeof(device_id), 0) != CR_SUCCESS
				    || strncmp(device_id, "USB\\", 4))
					continue;

				/* discard one layer for composite devices */
				char compat_ids[512], *p = compat_ids;
				size = sizeof(compat_ids);
				if (CM_Get_DevNode_Registry_PropertyA(dev_inst,
				                                      CM_DRP_COMPATIBLEIDS, 0,
				                                      &compat_ids,
				                                      &size, 0) == CR_SUCCESS) {
					while (*p) {
						if (!strncmp(p, "USB\\COMPOSITE", 13))
							break;
						p += strlen(p) + 1;
					}
					if (*p)
						continue;
				}

				/* stop the recursion when reaching the USB root */
				if (!strncmp(device_id, "USB\\ROOT", 8))
					break;

				/* prepend the address of current USB layer to the USB path */
				DWORD address;
				size = sizeof(address);
				if (CM_Get_DevNode_Registry_PropertyA(dev_inst, CM_DRP_ADDRESS,
				                        0, &address, &size, 0) == CR_SUCCESS) {
					strcpy(tmp, usb_path);
					snprintf(usb_path, sizeof(usb_path), "%d%s%s",
					         (int)address, *tmp ? "." : "", tmp);
				}
			} while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS);

			port->usb_path = strdup(usb_path);

			/* wake up the USB device to be able to read string descriptor */
			char *escaped_port_name;
			HANDLE handle;
			if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
				RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
			sprintf(escaped_port_name, "\\\\.\\%s", port->name);
			handle = CreateFile(escaped_port_name, GENERIC_READ, 0, 0,
			                    OPEN_EXISTING,
			                    FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED, 0);
			free(escaped_port_name);
			CloseHandle(handle);

			/* retrieve USB device details from the device descriptor */
			get_usb_details(port, device_info_data.DevInst);
		}
		break;
	}

	SetupDiDestroyDeviceInfoList(device_info);

	RETURN_OK();
}

SP_PRIV enum sp_return list_ports(struct sp_port ***list)
{
	HKEY key;
	TCHAR *value, *data;
	DWORD max_value_len, max_data_size, max_data_len;
	DWORD value_len, data_size, data_len;
	DWORD type, index = 0;
	char *name;
	int name_len;
	int ret = SP_OK;

	DEBUG("Opening registry key");
	if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
			0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) {
		SET_FAIL(ret, "RegOpenKeyEx() failed");
		goto out_done;
	}
	DEBUG("Querying registry key value and data sizes");
	if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
				&max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) {
		SET_FAIL(ret, "RegQueryInfoKey() failed");
		goto out_close;
	}
	max_data_len = max_data_size / sizeof(TCHAR);
	if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
		SET_ERROR(ret, SP_ERR_MEM, "registry value malloc failed");
		goto out_close;
	}
	if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
		SET_ERROR(ret, SP_ERR_MEM, "registry data malloc failed");
		goto out_free_value;
	}
	DEBUG("Iterating over values");
	while (
		value_len = max_value_len + 1,
		data_size = max_data_size,
		RegEnumValue(key, index, value, &value_len,
			NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
	{
		if (type == REG_SZ) {
			data_len = data_size / sizeof(TCHAR);
			data[data_len] = '\0';
#ifdef UNICODE
			name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL);
#else
			name_len = data_len + 1;
#endif
			if (!(name = malloc(name_len))) {
				SET_ERROR(ret, SP_ERR_MEM, "registry port name malloc failed");
				goto out;
			}
#ifdef UNICODE
			WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
#else
			strcpy(name, data);
#endif
			DEBUG_FMT("Found port %s", name);
			if (!(*list = list_append(*list, name))) {
				SET_ERROR(ret, SP_ERR_MEM, "list append failed");
				free(name);
				goto out;
			}
			free(name);
		}
		index++;
	}
out:
	free(data);
out_free_value:
	free(value);
out_close:
	RegCloseKey(key);
out_done:

	return ret;
}
Commit	Line	Data
e33dcf90 ML	1	/*
	2	* This file is part of the libserialport project.
	3	*
48a4076f	4	* Copyright (C) 2013-2014 Martin Ling <martin-libserialport@earth.li>
e33dcf90 ML	5	* Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU Lesser General Public License as
	9	* published by the Free Software Foundation, either version 3 of the
	10	* License, or (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include "libserialport.h"
	22	#include "libserialport_internal.h"
	23
	24	/* USB path is a string of at most 8 decimal numbers < 128 separated by dots */
	25	#define MAX_USB_PATH (83 + 71 + 1)
	26
	27	static void enumerate_hub(struct sp_port port, char hub_name,
	28	char *parent_path);
	29
	30	static char *wc_to_utf8(PWCHAR wc_buffer, ULONG size)
	31	{
	32	WCHAR wc_str[size/sizeof(WCHAR)+1];
	33	char *utf8_str;
	34
	35	/* zero terminate the wide char string */
	36	memcpy(wc_str, wc_buffer, size);
	37	wc_str[sizeof(wc_str)-1] = 0;
	38
	39	/* compute the size of the utf8 converted string */
	40	if (!(size = WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
	41	NULL, 0, NULL, NULL)))
	42	return NULL;
	43
	44	/* allocate utf8 output buffer */
	45	if (!(utf8_str = malloc(size)))
	46	return NULL;
	47
	48	/* actually converted to utf8 */
	49	if (!WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
	50	utf8_str, size, NULL, NULL)) {
	51	free(utf8_str);
	52	return NULL;
	53	}
	54
	55	return utf8_str;
	56	}
	57
	58	static char *get_root_hub_name(HANDLE host_controller)
	59	{
	60	USB_ROOT_HUB_NAME root_hub_name;
	61	PUSB_ROOT_HUB_NAME root_hub_name_wc;
	62	char *root_hub_name_utf8;
	63	ULONG size = 0;
	64
	65	/* compute the size of the root hub name string */
	66	if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME, 0, 0,
	67	&root_hub_name, sizeof(root_hub_name), &size, NULL))
	68	return NULL;
69
70	/* allocate wide char root hub name string */
71	size = root_hub_name.ActualLength;
72	if (!(root_hub_name_wc = malloc(size)))
73	return NULL;
74
75	/* actually get the root hub name string */
76	if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME,
77	NULL, 0, root_hub_name_wc, size, &size, NULL)) {
78	free(root_hub_name_wc);
79	return NULL;
80	}
81
82	/* convert the root hub name string to utf8 */
83	root_hub_name_utf8 = wc_to_utf8(root_hub_name_wc->RootHubName, size);
84	free(root_hub_name_wc);
85	return root_hub_name_utf8;
86	}
87
88	static char *get_external_hub_name(HANDLE hub, ULONG connection_index)
89	{
90	USB_NODE_CONNECTION_NAME ext_hub_name;
91	PUSB_NODE_CONNECTION_NAME ext_hub_name_wc;
92	char *ext_hub_name_utf8;
93	ULONG size;
94
95	/* compute the size of the external hub name string */
96	ext_hub_name.ConnectionIndex = connection_index;
97	if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
98	&ext_hub_name, sizeof(ext_hub_name),
99	&ext_hub_name, sizeof(ext_hub_name), &size, NULL))
100	return NULL;
101
102	/* allocate wide char external hub name string */
103	size = ext_hub_name.ActualLength;
104	if (size <= sizeof(ext_hub_name)
105	\|\| !(ext_hub_name_wc = malloc(size)))
106	return NULL;
107
108	/* get the name of the external hub attached to the specified port */
109	ext_hub_name_wc->ConnectionIndex = connection_index;
110	if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
111	ext_hub_name_wc, size,
112	ext_hub_name_wc, size, &size, NULL)) {
113	free(ext_hub_name_wc);
114	return NULL;
115	}
116
117	/* convert the external hub name string to utf8 */
118	ext_hub_name_utf8 = wc_to_utf8(ext_hub_name_wc->NodeName, size);
119	free(ext_hub_name_wc);
120	return ext_hub_name_utf8;
121	}
122
123	static char *get_string_descriptor(HANDLE hub_device, ULONG connection_index,
124	UCHAR descriptor_index)
125	{
126	char desc_req_buf[sizeof(USB_DESCRIPTOR_REQUEST) +
127	MAXIMUM_USB_STRING_LENGTH] = { 0 };
128	PUSB_DESCRIPTOR_REQUEST desc_req = (void *) desc_req_buf;
129	PUSB_STRING_DESCRIPTOR desc = (void *) (desc_req + 1);
130	ULONG size = sizeof(desc_req_buf);
131
132	desc_req->ConnectionIndex = connection_index;
133	desc_req->SetupPacket.wValue = (USB_STRING_DESCRIPTOR_TYPE << 8)
134	\| descriptor_index;
135	desc_req->SetupPacket.wIndex = 0;
136	desc_req->SetupPacket.wLength = size - sizeof(*desc_req);
137
138	if (!DeviceIoControl(hub_device,
139	IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
140	desc_req, size, desc_req, size, &size, NULL)
141	\|\| size < 2
142	\|\| desc->bDescriptorType != USB_STRING_DESCRIPTOR_TYPE
143	\|\| desc->bLength != size - sizeof(*desc_req)
144	\|\| desc->bLength % 2)
145	return NULL;
146
147	return wc_to_utf8(desc->bString, desc->bLength);
148	}
149
150	static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
151	ULONG nb_ports, char *parent_path)
152	{
153	char path[MAX_USB_PATH];
154	ULONG index = 0;
155
156	for (index = 1; index <= nb_ports; index++) {
157	PUSB_NODE_CONNECTION_INFORMATION_EX connection_info_ex;
158	ULONG size = sizeof(connection_info_ex) + 30sizeof(USB_PIPE_INFO);
159
160	if (!(connection_info_ex = malloc(size)))
161	break;
162
163	connection_info_ex->ConnectionIndex = index;
164	if (!DeviceIoControl(hub_device,
165	IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX,
166	connection_info_ex, size,
167	connection_info_ex, size, &size, NULL)) {
168	/* try to get CONNECTION_INFORMATION if CONNECTION_INFORMATION_EX
169	did not work */
170	PUSB_NODE_CONNECTION_INFORMATION connection_info;
171
172	size = sizeof(connection_info) + 30sizeof(USB_PIPE_INFO);
173	if (!(connection_info = malloc(size))) {
174	free(connection_info_ex);
175	continue;
176	}
177	connection_info->ConnectionIndex = index;
178	if (!DeviceIoControl(hub_device,
179	IOCTL_USB_GET_NODE_CONNECTION_INFORMATION,
180	connection_info, size,
181	connection_info, size, &size, NULL)) {
182	free(connection_info);
183	free(connection_info_ex);
184	continue;
185	}
186
187	connection_info_ex->ConnectionIndex = connection_info->ConnectionIndex;
188	connection_info_ex->DeviceDescriptor = connection_info->DeviceDescriptor;
189	connection_info_ex->DeviceIsHub = connection_info->DeviceIsHub;
190	connection_info_ex->DeviceAddress = connection_info->DeviceAddress;
191	free(connection_info);
192	}
193
194	if (connection_info_ex->DeviceIsHub) {
195	/* recursively enumerate external hub */
196	PCHAR ext_hub_name;
197	if ((ext_hub_name = get_external_hub_name(hub_device, index))) {
198	snprintf(path, sizeof(path), "%s%ld.",
199	parent_path, connection_info_ex->ConnectionIndex);
200	enumerate_hub(port, ext_hub_name, path);
201	}
202	free(connection_info_ex);
203	} else {
204	snprintf(path, sizeof(path), "%s%ld",
205	parent_path, connection_info_ex->ConnectionIndex);
206
207	/* check if this device is the one we search for */
208	if (strcmp(path, port->usb_path)) {
209	free(connection_info_ex);
210	continue;
211	}
212
213	/* finally grab detailed informations regarding the device */
214	port->usb_address = connection_info_ex->DeviceAddress + 1;
215	port->usb_vid = connection_info_ex->DeviceDescriptor.idVendor;
216	port->usb_pid = connection_info_ex->DeviceDescriptor.idProduct;
217
218	if (connection_info_ex->DeviceDescriptor.iManufacturer)
219	port->usb_manufacturer = get_string_descriptor(hub_device,index,
220	connection_info_ex->DeviceDescriptor.iManufacturer);
221	if (connection_info_ex->DeviceDescriptor.iProduct)
222	port->usb_product = get_string_descriptor(hub_device, index,
223	connection_info_ex->DeviceDescriptor.iProduct);
224	if (connection_info_ex->DeviceDescriptor.iSerialNumber)
225	port->usb_serial = get_string_descriptor(hub_device, index,
226	connection_info_ex->DeviceDescriptor.iSerialNumber);
227
228	free(connection_info_ex);
229	break;
230	}
231	}
232	}
233
234	static void enumerate_hub(struct sp_port port, char hub_name,
235	char *parent_path)
236	{
237	USB_NODE_INFORMATION hub_info;
238	HANDLE hub_device;
239	ULONG size = sizeof(hub_info);
240	char *device_name;
241
242	/* open the hub with its full name */
243	if (!(device_name = malloc(strlen("\\\\.\\") + strlen(hub_name) + 1)))
244	return;
245	strcpy(device_name, "\\\\.\\");
246	strcat(device_name, hub_name);
247	hub_device = CreateFile(device_name, GENERIC_WRITE, FILE_SHARE_WRITE,
248	NULL, OPEN_EXISTING, 0, NULL);
249	free(device_name);
250	if (hub_device == INVALID_HANDLE_VALUE)
251	return;
252
253	/* get the number of ports of the hub */
254	if (DeviceIoControl(hub_device, IOCTL_USB_GET_NODE_INFORMATION,
255	&hub_info, size, &hub_info, size, &size, NULL))
d66bbcea	256	/* enumerate the ports of the hub */
e33dcf90 ML	257	enumerate_hub_ports(port, hub_device,
	258	hub_info.u.HubInformation.HubDescriptor.bNumberOfPorts, parent_path);
	259
	260	CloseHandle(hub_device);
	261	}
	262
	263	static void enumerate_host_controller(struct sp_port *port,
	264	HANDLE host_controller_device)
	265	{
	266	char *root_hub_name;
	267
	268	if ((root_hub_name = get_root_hub_name(host_controller_device))) {
	269	enumerate_hub(port, root_hub_name, "");
	270	free(root_hub_name);
	271	}
	272	}
	273
	274	static void get_usb_details(struct sp_port *port, DEVINST dev_inst_match)
	275	{
	276	HDEVINFO device_info;
	277	SP_DEVINFO_DATA device_info_data;
	278	ULONG i, size = 0;
	279
	280	device_info = SetupDiGetClassDevs(&GUID_CLASS_USB_HOST_CONTROLLER,NULL,NULL,
	281	DIGCF_PRESENT \| DIGCF_DEVICEINTERFACE);
	282	device_info_data.cbSize = sizeof(device_info_data);
	283
	284	for (i=0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
	285	SP_DEVICE_INTERFACE_DATA device_interface_data;
	286	PSP_DEVICE_INTERFACE_DETAIL_DATA device_detail_data;
	287	DEVINST dev_inst = dev_inst_match;
	288	HANDLE host_controller_device;
	289
	290	device_interface_data.cbSize = sizeof(device_interface_data);
	291	if (!SetupDiEnumDeviceInterfaces(device_info, 0,
	292	&GUID_CLASS_USB_HOST_CONTROLLER,
	293	i, &device_interface_data))
	294	continue;
	295
	296	if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
	297	NULL, 0, &size, NULL)
	298	&& GetLastError() != ERROR_INSUFFICIENT_BUFFER)
	299	continue;
	300
	301	if (!(device_detail_data = malloc(size)))
	302	continue;
	303	device_detail_data->cbSize = sizeof(*device_detail_data);
	304	if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
	305	device_detail_data, size, &size,
	306	NULL)) {
	307	free(device_detail_data);
	308	continue;
	309	}
	310
	311	while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS
	312	&& dev_inst != device_info_data.DevInst) { }
	313	if (dev_inst != device_info_data.DevInst) {
	314	free(device_detail_data);
	315	continue;
	316	}
	317
	318	port->usb_bus = i + 1;
	319
	320	host_controller_device = CreateFile(device_detail_data->DevicePath,
321	GENERIC_WRITE, FILE_SHARE_WRITE,
322	NULL, OPEN_EXISTING, 0, NULL);
323	if (host_controller_device != INVALID_HANDLE_VALUE) {
324	enumerate_host_controller(port, host_controller_device);
325	CloseHandle(host_controller_device);
326	}
327	free(device_detail_data);
328	}
329
330	SetupDiDestroyDeviceInfoList(device_info);
331	return;
332	}
333
970f279a	334	SP_PRIV enum sp_return get_port_details(struct sp_port *port)
e33dcf90 ML	335	{
	336	/* Description limited to 127 char,
	337	anything longer would not be user friendly anyway */
	338	char description[128];
	339	SP_DEVINFO_DATA device_info_data = { .cbSize = sizeof(device_info_data) };
	340	HDEVINFO device_info;
	341	int i;
	342
	343	device_info = SetupDiGetClassDevs(NULL, 0, 0,
	344	DIGCF_PRESENT \| DIGCF_ALLCLASSES);
	345	if (device_info == INVALID_HANDLE_VALUE)
	346	RETURN_FAIL("SetupDiGetClassDevs() failed");
	347
	348	for (i=0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
	349	HKEY device_key;
	350	DEVINST dev_inst;
	351	char value[8], class[16];
	352	DWORD size, type;
	353	CONFIGRET cr;
	354
	355	/* check if this is the device we are looking for */
b328a48b AJ	356	device_key = SetupDiOpenDevRegKey(device_info, &device_info_data,
	357	DICS_FLAG_GLOBAL, 0,
	358	DIREG_DEV, KEY_QUERY_VALUE);
	359	if (device_key == INVALID_HANDLE_VALUE)
e33dcf90 ML	360	continue;
	361	size = sizeof(value);
	362	if (RegQueryValueExA(device_key, "PortName", NULL, &type, (LPBYTE)value,
7aeb6736 AJ	363	&size) != ERROR_SUCCESS \|\| type != REG_SZ) {
7aeb6736 AJ	364	RegCloseKey(device_key);
e33dcf90	365	continue;
7aeb6736	366	}
e33dcf90 ML	367	RegCloseKey(device_key);
	368	value[sizeof(value)-1] = 0;
	369	if (strcmp(value, port->name))
	370	continue;
	371
	372	/* check port transport type */
	373	dev_inst = device_info_data.DevInst;
	374	size = sizeof(class);
	375	cr = CR_FAILURE;
	376	while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS &&
	377	(cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
	378	CM_DRP_CLASS, 0, class, &size, 0)) != CR_SUCCESS) { }
	379	if (cr == CR_SUCCESS) {
	380	if (!strcmp(class, "USB"))
	381	port->transport = SP_TRANSPORT_USB;
	382	}
	383
	384	/* get port description (friendly name) */
	385	dev_inst = device_info_data.DevInst;
	386	size = sizeof(description);
	387	while ((cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
	388	CM_DRP_FRIENDLYNAME, 0, description, &size, 0)) != CR_SUCCESS
	389	&& CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) { }
	390	if (cr == CR_SUCCESS)
	391	port->description = strdup(description);
	392
	393	/* get more informations for USB connected ports */
	394	if (port->transport == SP_TRANSPORT_USB) {
	395	char usb_path[MAX_USB_PATH] = "", tmp[MAX_USB_PATH];
	396	char device_id[MAX_DEVICE_ID_LEN];
	397
	398	/* recurse over parents to build the USB device path */
	399	dev_inst = device_info_data.DevInst;
	400	do {
	401	/* verify that this layer of the tree is USB related */
	402	if (CM_Get_Device_IDA(dev_inst, device_id,
	403	sizeof(device_id), 0) != CR_SUCCESS
	404	\|\| strncmp(device_id, "USB\\", 4))
	405	continue;
	406
	407	/* discard one layer for composite devices */
	408	char compat_ids[512], *p = compat_ids;
	409	size = sizeof(compat_ids);
	410	if (CM_Get_DevNode_Registry_PropertyA(dev_inst,
	411	CM_DRP_COMPATIBLEIDS, 0,
	412	&compat_ids,
	413	&size, 0) == CR_SUCCESS) {
	414	while (*p) {
	415	if (!strncmp(p, "USB\\COMPOSITE", 13))
	416	break;
	417	p += strlen(p) + 1;
	418	}
	419	if (*p)
	420	continue;
	421	}
	422
	423	/* stop the recursion when reaching the USB root */
	424	if (!strncmp(device_id, "USB\\ROOT", 8))
	425	break;
	426
	427	/* prepend the address of current USB layer to the USB path */
	428	DWORD address;
	429	size = sizeof(address);
	430	if (CM_Get_DevNode_Registry_PropertyA(dev_inst, CM_DRP_ADDRESS,
431	0, &address, &size, 0) == CR_SUCCESS) {
432	strcpy(tmp, usb_path);
433	snprintf(usb_path, sizeof(usb_path), "%d%s%s",
434	(int)address, *tmp ? "." : "", tmp);
435	}
436	} while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS);
437
438	port->usb_path = strdup(usb_path);
439
440	/* wake up the USB device to be able to read string descriptor */
441	char *escaped_port_name;
442	HANDLE handle;
443	if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
444	RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
445	sprintf(escaped_port_name, "\\\\.\\%s", port->name);
446	handle = CreateFile(escaped_port_name, GENERIC_READ, 0, 0,
447	OPEN_EXISTING,
448	FILE_ATTRIBUTE_NORMAL\|FILE_FLAG_OVERLAPPED, 0);
449	free(escaped_port_name);
450	CloseHandle(handle);
451
d66bbcea	452	/* retrieve USB device details from the device descriptor */
e33dcf90 ML	453	get_usb_details(port, device_info_data.DevInst);
	454	}
	455	break;
	456	}
	457
7aeb6736 AJ	458	SetupDiDestroyDeviceInfoList(device_info);
7aeb6736 AJ	459
e33dcf90 ML	460	RETURN_OK();
	461	}
	462
970f279a	463	SP_PRIV enum sp_return list_ports(struct sp_port ***list)
48a4076f AJ	464	{
	465	HKEY key;
	466	TCHAR value, data;
	467	DWORD max_value_len, max_data_size, max_data_len;
	468	DWORD value_len, data_size, data_len;
	469	DWORD type, index = 0;
	470	char *name;
	471	int name_len;
	472	int ret = SP_OK;
	473
	474	DEBUG("Opening registry key");
	475	if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
	476	0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) {
	477	SET_FAIL(ret, "RegOpenKeyEx() failed");
	478	goto out_done;
	479	}
	480	DEBUG("Querying registry key value and data sizes");
	481	if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
	482	&max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) {
	483	SET_FAIL(ret, "RegQueryInfoKey() failed");
	484	goto out_close;
	485	}
	486	max_data_len = max_data_size / sizeof(TCHAR);
	487	if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
	488	SET_ERROR(ret, SP_ERR_MEM, "registry value malloc failed");
	489	goto out_close;
	490	}
	491	if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
	492	SET_ERROR(ret, SP_ERR_MEM, "registry data malloc failed");
	493	goto out_free_value;
	494	}
	495	DEBUG("Iterating over values");
	496	while (
	497	value_len = max_value_len + 1,
	498	data_size = max_data_size,
	499	RegEnumValue(key, index, value, &value_len,
	500	NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
	501	{
7aeb6736	502	if (type == REG_SZ) {
6c444ade AJ	503	data_len = data_size / sizeof(TCHAR);
6c444ade AJ	504	data[data_len] = '\0';
48a4076f	505	#ifdef UNICODE
6c444ade	506	name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL);
48a4076f	507	#else
6c444ade	508	name_len = data_len + 1;
48a4076f	509	#endif
6c444ade AJ	510	if (!(name = malloc(name_len))) {
	511	SET_ERROR(ret, SP_ERR_MEM, "registry port name malloc failed");
	512	goto out;
	513	}
48a4076f	514	#ifdef UNICODE
6c444ade	515	WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
48a4076f	516	#else
6c444ade	517	strcpy(name, data);
48a4076f	518	#endif
d38c7d2c	519	DEBUG_FMT("Found port %s", name);
48a4076f AJ	520	if (!(list = list_append(list, name))) {
48a4076f AJ	521	SET_ERROR(ret, SP_ERR_MEM, "list append failed");
7aeb6736	522	free(name);
48a4076f AJ	523	goto out;
48a4076f AJ	524	}
7aeb6736	525	free(name);
48a4076f AJ	526	}
	527	index++;
	528	}
	529	out:
	530	free(data);
	531	out_free_value:
	532	free(value);
	533	out_close:
	534	RegCloseKey(key);
	535	out_done:
	536
	537	return ret;
	538	}