windows.c

   1 /*
   2  * This file is part of the libserialport project.
   3  *
   4  * Copyright (C) 2013-2014 Martin Ling <martin-libserialport@earth.li>
   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 <config.h>
  22 #include "libserialport.h"
  23 #include "libserialport_internal.h"
  24
  25 /* USB path is a string of at most 8 decimal numbers < 128 separated by dots. */
  26 #define MAX_USB_PATH ((8 * 3) + (7 * 1) + 1)
  27
  28 static void enumerate_hub(struct sp_port *port, const char *hub_name,
  29                           const char *parent_path, DEVINST dev_inst);
  30
  31 static char *wc_to_utf8(PWCHAR wc_buffer, ULONG size)
  32 {
  33         ULONG wc_length = size / sizeof(WCHAR);
  34         WCHAR wc_str[wc_length + 1];
  35         char *utf8_str;
  36
  37         /* Zero-terminate the wide char string. */
  38         memcpy(wc_str, wc_buffer, size);
  39         wc_str[wc_length] = 0;
  40
  41         /* Compute the size of the UTF-8 converted string. */
  42         if (!(size = WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
  43                                          NULL, 0, NULL, NULL)))
  44                 return NULL;
  45
  46         /* Allocate UTF-8 output buffer. */
  47         if (!(utf8_str = malloc(size)))
  48                 return NULL;
  49
  50         /* Actually converted to UTF-8. */
  51         if (!WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS, wc_str, -1,
  52                                  utf8_str, size, NULL, NULL)) {
  53                 free(utf8_str);
  54                 return NULL;
  55         }
  56
  57         return utf8_str;
  58 }
  59
  60 static char *get_root_hub_name(HANDLE host_controller)
  61 {
  62         USB_ROOT_HUB_NAME root_hub_name;
  63         PUSB_ROOT_HUB_NAME root_hub_name_wc;
  64         char *root_hub_name_utf8;
  65         ULONG size = 0;
  66
  67         /* Compute the size of the root hub name string. */
  68         if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME, 0, 0,
  69                              &root_hub_name, sizeof(root_hub_name), &size, NULL))
  70                 return NULL;
  71
  72         /* Allocate wide char root hub name string. */
  73         size = root_hub_name.ActualLength;
  74         if (!(root_hub_name_wc = malloc(size)))
  75                 return NULL;
  76
  77         /* Actually get the root hub name string. */
  78         if (!DeviceIoControl(host_controller, IOCTL_USB_GET_ROOT_HUB_NAME,
  79                              NULL, 0, root_hub_name_wc, size, &size, NULL)) {
  80                 free(root_hub_name_wc);
  81                 return NULL;
  82         }
  83
  84         /* Convert the root hub name string to UTF-8. */
  85         root_hub_name_utf8 = wc_to_utf8(root_hub_name_wc->RootHubName, size - offsetof(USB_ROOT_HUB_NAME, RootHubName));
  86         free(root_hub_name_wc);
  87         return root_hub_name_utf8;
  88 }
  89
  90 static char *get_external_hub_name(HANDLE hub, ULONG connection_index)
  91 {
  92         USB_NODE_CONNECTION_NAME ext_hub_name;
  93         PUSB_NODE_CONNECTION_NAME ext_hub_name_wc;
  94         char *ext_hub_name_utf8;
  95         ULONG size;
  96
  97         /* Compute the size of the external hub name string. */
  98         ext_hub_name.ConnectionIndex = connection_index;
  99         if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
 100                              &ext_hub_name, sizeof(ext_hub_name),
 101                              &ext_hub_name, sizeof(ext_hub_name), &size, NULL))
 102                 return NULL;
 103
 104         /* Allocate wide char external hub name string. */
 105         size = ext_hub_name.ActualLength;
 106         if (size <= sizeof(ext_hub_name)
 107             || !(ext_hub_name_wc = malloc(size)))
 108                 return NULL;
 109
 110         /* Get the name of the external hub attached to the specified port. */
 111         ext_hub_name_wc->ConnectionIndex = connection_index;
 112         if (!DeviceIoControl(hub, IOCTL_USB_GET_NODE_CONNECTION_NAME,
 113                              ext_hub_name_wc, size,
 114                              ext_hub_name_wc, size, &size, NULL)) {
 115                 free(ext_hub_name_wc);
 116                 return NULL;
 117         }
 118
 119         /* Convert the external hub name string to UTF-8. */
 120         ext_hub_name_utf8 = wc_to_utf8(ext_hub_name_wc->NodeName, size - offsetof(USB_NODE_CONNECTION_NAME, NodeName));
 121         free(ext_hub_name_wc);
 122         return ext_hub_name_utf8;
 123 }
 124
 125 static char *get_string_descriptor(HANDLE hub_device, ULONG connection_index,
 126                                    UCHAR descriptor_index)
 127 {
 128         char desc_req_buf[sizeof(USB_DESCRIPTOR_REQUEST) +
 129                           MAXIMUM_USB_STRING_LENGTH] = { 0 };
 130         PUSB_DESCRIPTOR_REQUEST desc_req = (void *)desc_req_buf;
 131         PUSB_STRING_DESCRIPTOR desc = (void *)(desc_req + 1);
 132         ULONG size = sizeof(desc_req_buf);
 133
 134         desc_req->ConnectionIndex = connection_index;
 135         desc_req->SetupPacket.wValue = (USB_STRING_DESCRIPTOR_TYPE << 8)
 136                                        | descriptor_index;
 137         desc_req->SetupPacket.wIndex = 0;
 138         desc_req->SetupPacket.wLength = size - sizeof(*desc_req);
 139
 140         if (!DeviceIoControl(hub_device,
 141                              IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION,
 142                              desc_req, size, desc_req, size, &size, NULL)
 143             || size < 2
 144             || desc->bDescriptorType != USB_STRING_DESCRIPTOR_TYPE
 145             || desc->bLength != size - sizeof(*desc_req)
 146             || desc->bLength % 2)
 147                 return NULL;
 148
 149         return wc_to_utf8(desc->bString, desc->bLength - offsetof(USB_STRING_DESCRIPTOR, bString));
 150 }
 151
 152 static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
 153                                 ULONG nb_ports, const char *parent_path, DEVINST dev_inst)
 154 {
 155         char path[MAX_USB_PATH];
 156         ULONG index = 0;
 157
 158         for (index = 1; index <= nb_ports; index++) {
 159                 PUSB_NODE_CONNECTION_INFORMATION_EX connection_info_ex;
 160                 ULONG size = sizeof(*connection_info_ex) + (30 * sizeof(USB_PIPE_INFO));
 161
 162                 if (!(connection_info_ex = malloc(size)))
 163                         break;
 164
 165                 connection_info_ex->ConnectionIndex = index;
 166                 if (!DeviceIoControl(hub_device,
 167                                      IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX,
 168                                      connection_info_ex, size,
 169                                      connection_info_ex, size, &size, NULL)) {
 170                         /*
 171                          * Try to get CONNECTION_INFORMATION if
 172                          * CONNECTION_INFORMATION_EX did not work.
 173                          */
 174                         PUSB_NODE_CONNECTION_INFORMATION connection_info;
 175
 176                         size = sizeof(*connection_info) + (30 * sizeof(USB_PIPE_INFO));
 177                         if (!(connection_info = malloc(size))) {
 178                                 free(connection_info_ex);
 179                                 continue;
 180                         }
 181                         connection_info->ConnectionIndex = index;
 182                         if (!DeviceIoControl(hub_device,
 183                                              IOCTL_USB_GET_NODE_CONNECTION_INFORMATION,
 184                                              connection_info, size,
 185                                              connection_info, size, &size, NULL)) {
 186                                 free(connection_info);
 187                                 free(connection_info_ex);
 188                                 continue;
 189                         }
 190
 191                         connection_info_ex->ConnectionIndex = connection_info->ConnectionIndex;
 192                         connection_info_ex->DeviceDescriptor = connection_info->DeviceDescriptor;
 193                         connection_info_ex->DeviceIsHub = connection_info->DeviceIsHub;
 194                         connection_info_ex->DeviceAddress = connection_info->DeviceAddress;
 195                         free(connection_info);
 196                 }
 197
 198                 if (connection_info_ex->DeviceIsHub) {
 199                         /* Recursively enumerate external hub. */
 200                         PCHAR ext_hub_name;
 201                         if ((ext_hub_name = get_external_hub_name(hub_device, index))) {
 202                                 snprintf(path, sizeof(path), "%s%ld.",
 203                                          parent_path, connection_info_ex->ConnectionIndex);
 204                                 enumerate_hub(port, ext_hub_name, path, dev_inst);
 205                         }
 206                         free(connection_info_ex);
 207                 } else {
 208                         snprintf(path, sizeof(path), "%s%ld",
 209                                  parent_path, connection_info_ex->ConnectionIndex);
 210
 211                         /* Check if this device is the one we search for. */
 212                         if (strcmp(path, port->usb_path)) {
 213                                 free(connection_info_ex);
 214                                 continue;
 215                         }
 216
 217                         /* Finally grab detailed information regarding the device. */
 218                         port->usb_address = connection_info_ex->DeviceAddress + 1;
 219                         port->usb_vid = connection_info_ex->DeviceDescriptor.idVendor;
 220                         port->usb_pid = connection_info_ex->DeviceDescriptor.idProduct;
 221
 222                         if (connection_info_ex->DeviceDescriptor.iManufacturer)
 223                                 port->usb_manufacturer = get_string_descriptor(hub_device, index,
 224                                            connection_info_ex->DeviceDescriptor.iManufacturer);
 225                         if (connection_info_ex->DeviceDescriptor.iProduct)
 226                                 port->usb_product = get_string_descriptor(hub_device, index,
 227                                            connection_info_ex->DeviceDescriptor.iProduct);
 228                         if (connection_info_ex->DeviceDescriptor.iSerialNumber) {
 229                                 port->usb_serial = get_string_descriptor(hub_device, index,
 230                                            connection_info_ex->DeviceDescriptor.iSerialNumber);
 231                                 if (port->usb_serial == NULL) {
 232                                         //composite device, get the parent's serial number
 233                                         char device_id[MAX_DEVICE_ID_LEN];
 234                                         if (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) {
 235                                                 if (CM_Get_Device_IDA(dev_inst, device_id, sizeof(device_id), 0) == CR_SUCCESS)
 236                                                         port->usb_serial = strdup(strrchr(device_id, '\\')+1);
 237                                         }
 238                                 }
 239                         }
 240
 241                         free(connection_info_ex);
 242                         break;
 243                 }
 244         }
 245 }
 246
 247 static void enumerate_hub(struct sp_port *port, const char *hub_name,
 248                           const char *parent_path, DEVINST dev_inst)
 249 {
 250         USB_NODE_INFORMATION hub_info;
 251         HANDLE hub_device;
 252         ULONG size = sizeof(hub_info);
 253         char *device_name;
 254
 255         /* Open the hub with its full name. */
 256         if (!(device_name = malloc(strlen("\\\\.\\") + strlen(hub_name) + 1)))
 257                 return;
 258         strcpy(device_name, "\\\\.\\");
 259         strcat(device_name, hub_name);
 260         hub_device = CreateFile(device_name, GENERIC_WRITE, FILE_SHARE_WRITE,
 261                                 NULL, OPEN_EXISTING, 0, NULL);
 262         free(device_name);
 263         if (hub_device == INVALID_HANDLE_VALUE)
 264                 return;
 265
 266         /* Get the number of ports of the hub. */
 267         if (DeviceIoControl(hub_device, IOCTL_USB_GET_NODE_INFORMATION,
 268                             &hub_info, size, &hub_info, size, &size, NULL))
 269                 /* Enumerate the ports of the hub. */
 270                 enumerate_hub_ports(port, hub_device,
 271                    hub_info.u.HubInformation.HubDescriptor.bNumberOfPorts, parent_path, dev_inst);
 272
 273         CloseHandle(hub_device);
 274 }
 275
 276 static void enumerate_host_controller(struct sp_port *port,
 277                                       HANDLE host_controller_device,
 278                                       DEVINST dev_inst)
 279 {
 280         char *root_hub_name;
 281
 282         if ((root_hub_name = get_root_hub_name(host_controller_device))) {
 283                 enumerate_hub(port, root_hub_name, "", dev_inst);
 284                 free(root_hub_name);
 285         }
 286 }
 287
 288 static void get_usb_details(struct sp_port *port, DEVINST dev_inst_match)
 289 {
 290         HDEVINFO device_info;
 291         SP_DEVINFO_DATA device_info_data;
 292         ULONG i, size = 0;
 293
 294         device_info = SetupDiGetClassDevs(&GUID_CLASS_USB_HOST_CONTROLLER, NULL, NULL,
 295                                           DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
 296         device_info_data.cbSize = sizeof(device_info_data);
 297
 298         for (i = 0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
 299                 SP_DEVICE_INTERFACE_DATA device_interface_data;
 300                 PSP_DEVICE_INTERFACE_DETAIL_DATA device_detail_data;
 301                 DEVINST dev_inst = dev_inst_match;
 302                 HANDLE host_controller_device;
 303
 304                 device_interface_data.cbSize = sizeof(device_interface_data);
 305                 if (!SetupDiEnumDeviceInterfaces(device_info, 0,
 306                                                  &GUID_CLASS_USB_HOST_CONTROLLER,
 307                                                  i, &device_interface_data))
 308                         continue;
 309
 310                 if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
 311                                                      NULL, 0, &size, NULL)
 312                     && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
 313                         continue;
 314
 315                 if (!(device_detail_data = malloc(size)))
 316                         continue;
 317                 device_detail_data->cbSize = sizeof(*device_detail_data);
 318                 if (!SetupDiGetDeviceInterfaceDetail(device_info,&device_interface_data,
 319                                                      device_detail_data, size, &size,
 320                                                      NULL)) {
 321                         free(device_detail_data);
 322                         continue;
 323                 }
 324
 325                 while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS
 326                        && dev_inst != device_info_data.DevInst) { }
 327                 if (dev_inst != device_info_data.DevInst) {
 328                         free(device_detail_data);
 329                         continue;
 330                 }
 331
 332                 port->usb_bus = i + 1;
 333
 334                 host_controller_device = CreateFile(device_detail_data->DevicePath,
 335                                                     GENERIC_WRITE, FILE_SHARE_WRITE,
 336                                                     NULL, OPEN_EXISTING, 0, NULL);
 337                 if (host_controller_device != INVALID_HANDLE_VALUE) {
 338                         enumerate_host_controller(port, host_controller_device, dev_inst_match);
 339                         CloseHandle(host_controller_device);
 340                 }
 341                 free(device_detail_data);
 342         }
 343
 344         SetupDiDestroyDeviceInfoList(device_info);
 345         return;
 346 }
 347
 348 SP_PRIV enum sp_return get_port_details(struct sp_port *port)
 349 {
 350         /*
 351          * Description limited to 127 char, anything longer
 352          * would not be user friendly anyway.
 353          */
 354         char description[128];
 355         SP_DEVINFO_DATA device_info_data = { .cbSize = sizeof(device_info_data) };
 356         HDEVINFO device_info;
 357         int i;
 358
 359         device_info = SetupDiGetClassDevs(NULL, 0, 0,
 360                                           DIGCF_PRESENT | DIGCF_ALLCLASSES);
 361         if (device_info == INVALID_HANDLE_VALUE)
 362                 RETURN_FAIL("SetupDiGetClassDevs() failed");
 363
 364         for (i = 0; SetupDiEnumDeviceInfo(device_info, i, &device_info_data); i++) {
 365                 HKEY device_key;
 366                 DEVINST dev_inst;
 367                 char value[8], class[16];
 368                 DWORD size, type;
 369                 CONFIGRET cr;
 370
 371                 /* Check if this is the device we are looking for. */
 372                 device_key = SetupDiOpenDevRegKey(device_info, &device_info_data,
 373                                                   DICS_FLAG_GLOBAL, 0,
 374                                                   DIREG_DEV, KEY_QUERY_VALUE);
 375                 if (device_key == INVALID_HANDLE_VALUE)
 376                         continue;
 377                 size = sizeof(value);
 378                 if (RegQueryValueExA(device_key, "PortName", NULL, &type, (LPBYTE)value,
 379                                      &size) != ERROR_SUCCESS || type != REG_SZ) {
 380                         RegCloseKey(device_key);
 381                         continue;
 382                 }
 383                 RegCloseKey(device_key);
 384                 value[sizeof(value) - 1] = 0;
 385                 if (strcmp(value, port->name))
 386                         continue;
 387
 388                 /* Check port transport type. */
 389                 dev_inst = device_info_data.DevInst;
 390                 size = sizeof(class);
 391                 cr = CR_FAILURE;
 392                 while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS &&
 393                        (cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
 394                                  CM_DRP_CLASS, 0, class, &size, 0)) != CR_SUCCESS) { }
 395                 if (cr == CR_SUCCESS) {
 396                         if (!strcmp(class, "USB"))
 397                                 port->transport = SP_TRANSPORT_USB;
 398                 }
 399
 400                 /* Get port description (friendly name). */
 401                 dev_inst = device_info_data.DevInst;
 402                 size = sizeof(description);
 403                 while ((cr = CM_Get_DevNode_Registry_PropertyA(dev_inst,
 404                           CM_DRP_FRIENDLYNAME, 0, description, &size, 0)) != CR_SUCCESS
 405                        && CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) { }
 406                 if (cr == CR_SUCCESS)
 407                         port->description = strdup(description);
 408
 409                 /* Get more informations for USB connected ports. */
 410                 if (port->transport == SP_TRANSPORT_USB) {
 411                         char usb_path[MAX_USB_PATH] = "", tmp[MAX_USB_PATH];
 412                         char device_id[MAX_DEVICE_ID_LEN];
 413
 414                         /* Recurse over parents to build the USB device path. */
 415                         dev_inst = device_info_data.DevInst;
 416                         do {
 417                                 /* Verify that this layer of the tree is USB related. */
 418                                 if (CM_Get_Device_IDA(dev_inst, device_id,
 419                                                       sizeof(device_id), 0) != CR_SUCCESS
 420                                     || strncmp(device_id, "USB\\", 4))
 421                                         continue;
 422
 423                                 /* Discard one layer for composite devices. */
 424                                 char compat_ids[512], *p = compat_ids;
 425                                 size = sizeof(compat_ids);
 426                                 if (CM_Get_DevNode_Registry_PropertyA(dev_inst,
 427                                                                       CM_DRP_COMPATIBLEIDS, 0,
 428                                                                       &compat_ids,
 429                                                                       &size, 0) == CR_SUCCESS) {
 430                                         while (*p) {
 431                                                 if (!strncmp(p, "USB\\COMPOSITE", 13))
 432                                                         break;
 433                                                 p += strlen(p) + 1;
 434                                         }
 435                                         if (*p)
 436                                                 continue;
 437                                 }
 438
 439                                 /* Stop the recursion when reaching the USB root. */
 440                                 if (!strncmp(device_id, "USB\\ROOT", 8))
 441                                         break;
 442
 443                                 /* Prepend the address of current USB layer to the USB path. */
 444                                 DWORD address;
 445                                 size = sizeof(address);
 446                                 if (CM_Get_DevNode_Registry_PropertyA(dev_inst, CM_DRP_ADDRESS,
 447                                                         0, &address, &size, 0) == CR_SUCCESS) {
 448                                         strcpy(tmp, usb_path);
 449                                         snprintf(usb_path, sizeof(usb_path), "%d%s%s",
 450                                                  (int)address, *tmp ? "." : "", tmp);
 451                                 }
 452                         } while (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS);
 453
 454                         port->usb_path = strdup(usb_path);
 455
 456                         /* Wake up the USB device to be able to read string descriptor. */
 457                         char *escaped_port_name;
 458                         HANDLE handle;
 459                         if (!(escaped_port_name = malloc(strlen(port->name) + 5)))
 460                                 RETURN_ERROR(SP_ERR_MEM, "Escaped port name malloc failed");
 461                         sprintf(escaped_port_name, "\\\\.\\%s", port->name);
 462                         handle = CreateFile(escaped_port_name, GENERIC_READ, 0, 0,
 463                                             OPEN_EXISTING,
 464                                             FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED, 0);
 465                         free(escaped_port_name);
 466                         CloseHandle(handle);
 467
 468                         /* Retrieve USB device details from the device descriptor. */
 469                         get_usb_details(port, device_info_data.DevInst);
 470                 }
 471                 break;
 472         }
 473
 474         SetupDiDestroyDeviceInfoList(device_info);
 475
 476         RETURN_OK();
 477 }
 478
 479 SP_PRIV enum sp_return list_ports(struct sp_port ***list)
 480 {
 481         HKEY key;
 482         TCHAR *value, *data;
 483         DWORD max_value_len, max_data_size, max_data_len;
 484         DWORD value_len, data_size, data_len;
 485         DWORD type, index = 0;
 486         LSTATUS result;
 487         char *name;
 488         int name_len;
 489         int ret = SP_OK;
 490
 491         DEBUG("Opening registry key");
 492         if ((result = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
 493                         0, KEY_QUERY_VALUE, &key)) != ERROR_SUCCESS) {
 494                 /* It's possible for this key to not exist if there are no serial ports
 495                  * at all. In that case we're done. Return a failure for any other error. */
 496                 if (result != ERROR_FILE_NOT_FOUND) {
 497                         SetLastError(result);
 498                         SET_FAIL(ret, "RegOpenKeyEx() failed");
 499                 }
 500                 goto out_done;
 501         }
 502         DEBUG("Querying registry key value and data sizes");
 503         if ((result = RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 504                                 &max_value_len, &max_data_size, NULL, NULL)) != ERROR_SUCCESS) {
 505                 SetLastError(result);
 506                 SET_FAIL(ret, "RegQueryInfoKey() failed");
 507                 goto out_close;
 508         }
 509         max_data_len = max_data_size / sizeof(TCHAR);
 510         if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
 511                 SET_ERROR(ret, SP_ERR_MEM, "Registry value malloc failed");
 512                 goto out_close;
 513         }
 514         if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
 515                 SET_ERROR(ret, SP_ERR_MEM, "Registry data malloc failed");
 516                 goto out_free_value;
 517         }
 518         DEBUG("Iterating over values");
 519         while (
 520                 value_len = max_value_len + 1,
 521                 data_size = max_data_size,
 522                 RegEnumValue(key, index, value, &value_len,
 523                         NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
 524         {
 525                 if (type == REG_SZ) {
 526                         data_len = data_size / sizeof(TCHAR);
 527                         data[data_len] = '\0';
 528 #ifdef UNICODE
 529                         name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL);
 530 #else
 531                         name_len = data_len + 1;
 532 #endif
 533                         if (!(name = malloc(name_len))) {
 534                                 SET_ERROR(ret, SP_ERR_MEM, "Registry port name malloc failed");
 535                                 goto out;
 536                         }
 537 #ifdef UNICODE
 538                         WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
 539 #else
 540                         strcpy(name, data);
 541 #endif
 542                         DEBUG_FMT("Found port %s", name);
 543                         if (!(*list = list_append(*list, name))) {
 544                                 SET_ERROR(ret, SP_ERR_MEM, "List append failed");
 545                                 free(name);
 546                                 goto out;
 547                         }
 548                         free(name);
 549                 }
 550                 index++;
 551         }
 552 out:
 553         free(data);
 554 out_free_value:
 555         free(value);
 556 out_close:
 557         RegCloseKey(key);
 558 out_done:
 559
 560         return ret;
 561 }